1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
6 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
7 Inc. with support from Florida State University (under contract
8 with the Ada Joint Program Office), and Silicon Graphics, Inc.
9 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
10 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
13 This file is part of GDB.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 2 of the License, or (at
18 your option) any later version.
20 This program is distributed in the hope that it will be useful, but
21 WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 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, write to the Free Software
27 Foundation, Inc., 51 Franklin Street, Fifth Floor,
28 Boston, MA 02110-1301, USA. */
35 #include "elf/dwarf2.h"
38 #include "expression.h"
39 #include "filenames.h" /* for DOSish file names */
42 #include "complaints.h"
44 #include "dwarf2expr.h"
45 #include "dwarf2loc.h"
46 #include "cp-support.h"
52 #include "gdb_string.h"
53 #include "gdb_assert.h"
54 #include <sys/types.h>
56 /* A note on memory usage for this file.
58 At the present time, this code reads the debug info sections into
59 the objfile's objfile_obstack. A definite improvement for startup
60 time, on platforms which do not emit relocations for debug
61 sections, would be to use mmap instead. The object's complete
62 debug information is loaded into memory, partly to simplify
63 absolute DIE references.
65 Whether using obstacks or mmap, the sections should remain loaded
66 until the objfile is released, and pointers into the section data
67 can be used for any other data associated to the objfile (symbol
68 names, type names, location expressions to name a few). */
71 /* .debug_info header for a compilation unit
72 Because of alignment constraints, this structure has padding and cannot
73 be mapped directly onto the beginning of the .debug_info section. */
74 typedef struct comp_unit_header
76 unsigned int length
; /* length of the .debug_info
78 unsigned short version
; /* version number -- 2 for DWARF
80 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
81 unsigned char addr_size
; /* byte size of an address -- 4 */
84 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
87 /* .debug_pubnames header
88 Because of alignment constraints, this structure has padding and cannot
89 be mapped directly onto the beginning of the .debug_info section. */
90 typedef struct pubnames_header
92 unsigned int length
; /* length of the .debug_pubnames
94 unsigned char version
; /* version number -- 2 for DWARF
96 unsigned int info_offset
; /* offset into .debug_info section */
97 unsigned int info_size
; /* byte size of .debug_info section
101 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
103 /* .debug_pubnames header
104 Because of alignment constraints, this structure has padding and cannot
105 be mapped directly onto the beginning of the .debug_info section. */
106 typedef struct aranges_header
108 unsigned int length
; /* byte len of the .debug_aranges
110 unsigned short version
; /* version number -- 2 for DWARF
112 unsigned int info_offset
; /* offset into .debug_info section */
113 unsigned char addr_size
; /* byte size of an address */
114 unsigned char seg_size
; /* byte size of segment descriptor */
117 #define _ACTUAL_ARANGES_HEADER_SIZE 12
119 /* .debug_line statement program prologue
120 Because of alignment constraints, this structure has padding and cannot
121 be mapped directly onto the beginning of the .debug_info section. */
122 typedef struct statement_prologue
124 unsigned int total_length
; /* byte length of the statement
126 unsigned short version
; /* version number -- 2 for DWARF
128 unsigned int prologue_length
; /* # bytes between prologue &
130 unsigned char minimum_instruction_length
; /* byte size of
132 unsigned char default_is_stmt
; /* initial value of is_stmt
135 unsigned char line_range
;
136 unsigned char opcode_base
; /* number assigned to first special
138 unsigned char *standard_opcode_lengths
;
142 static const struct objfile_data
*dwarf2_objfile_data_key
;
144 struct dwarf2_per_objfile
146 /* Sizes of debugging sections. */
147 unsigned int info_size
;
148 unsigned int abbrev_size
;
149 unsigned int line_size
;
150 unsigned int pubnames_size
;
151 unsigned int aranges_size
;
152 unsigned int loc_size
;
153 unsigned int macinfo_size
;
154 unsigned int str_size
;
155 unsigned int ranges_size
;
156 unsigned int frame_size
;
157 unsigned int eh_frame_size
;
159 /* Loaded data from the sections. */
160 gdb_byte
*info_buffer
;
161 gdb_byte
*abbrev_buffer
;
162 gdb_byte
*line_buffer
;
163 gdb_byte
*str_buffer
;
164 gdb_byte
*macinfo_buffer
;
165 gdb_byte
*ranges_buffer
;
166 gdb_byte
*loc_buffer
;
168 /* A list of all the compilation units. This is used to locate
169 the target compilation unit of a particular reference. */
170 struct dwarf2_per_cu_data
**all_comp_units
;
172 /* The number of compilation units in ALL_COMP_UNITS. */
175 /* A chain of compilation units that are currently read in, so that
176 they can be freed later. */
177 struct dwarf2_per_cu_data
*read_in_chain
;
179 /* A flag indicating wether this objfile has a section loaded at a
181 int has_section_at_zero
;
184 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
186 static asection
*dwarf_info_section
;
187 static asection
*dwarf_abbrev_section
;
188 static asection
*dwarf_line_section
;
189 static asection
*dwarf_pubnames_section
;
190 static asection
*dwarf_aranges_section
;
191 static asection
*dwarf_loc_section
;
192 static asection
*dwarf_macinfo_section
;
193 static asection
*dwarf_str_section
;
194 static asection
*dwarf_ranges_section
;
195 asection
*dwarf_frame_section
;
196 asection
*dwarf_eh_frame_section
;
198 /* names of the debugging sections */
200 #define INFO_SECTION ".debug_info"
201 #define ABBREV_SECTION ".debug_abbrev"
202 #define LINE_SECTION ".debug_line"
203 #define PUBNAMES_SECTION ".debug_pubnames"
204 #define ARANGES_SECTION ".debug_aranges"
205 #define LOC_SECTION ".debug_loc"
206 #define MACINFO_SECTION ".debug_macinfo"
207 #define STR_SECTION ".debug_str"
208 #define RANGES_SECTION ".debug_ranges"
209 #define FRAME_SECTION ".debug_frame"
210 #define EH_FRAME_SECTION ".eh_frame"
212 /* local data types */
214 /* We hold several abbreviation tables in memory at the same time. */
215 #ifndef ABBREV_HASH_SIZE
216 #define ABBREV_HASH_SIZE 121
219 /* The data in a compilation unit header, after target2host
220 translation, looks like this. */
221 struct comp_unit_head
223 unsigned long length
;
225 unsigned int abbrev_offset
;
226 unsigned char addr_size
;
227 unsigned char signed_addr_p
;
229 /* Size of file offsets; either 4 or 8. */
230 unsigned int offset_size
;
232 /* Size of the length field; either 4 or 12. */
233 unsigned int initial_length_size
;
235 /* Offset to the first byte of this compilation unit header in the
236 .debug_info section, for resolving relative reference dies. */
239 /* Pointer to this compilation unit header in the .debug_info
241 gdb_byte
*cu_head_ptr
;
243 /* Pointer to the first die of this compilation unit. This will be
244 the first byte following the compilation unit header. */
245 gdb_byte
*first_die_ptr
;
247 /* Pointer to the next compilation unit header in the program. */
248 struct comp_unit_head
*next
;
250 /* Base address of this compilation unit. */
251 CORE_ADDR base_address
;
253 /* Non-zero if base_address has been set. */
257 /* Fixed size for the DIE hash table. */
258 #ifndef REF_HASH_SIZE
259 #define REF_HASH_SIZE 1021
262 /* Internal state when decoding a particular compilation unit. */
265 /* The objfile containing this compilation unit. */
266 struct objfile
*objfile
;
268 /* The header of the compilation unit.
270 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
271 should logically be moved to the dwarf2_cu structure. */
272 struct comp_unit_head header
;
274 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
276 /* The language we are debugging. */
277 enum language language
;
278 const struct language_defn
*language_defn
;
280 const char *producer
;
282 /* The generic symbol table building routines have separate lists for
283 file scope symbols and all all other scopes (local scopes). So
284 we need to select the right one to pass to add_symbol_to_list().
285 We do it by keeping a pointer to the correct list in list_in_scope.
287 FIXME: The original dwarf code just treated the file scope as the
288 first local scope, and all other local scopes as nested local
289 scopes, and worked fine. Check to see if we really need to
290 distinguish these in buildsym.c. */
291 struct pending
**list_in_scope
;
293 /* Maintain an array of referenced fundamental types for the current
294 compilation unit being read. For DWARF version 1, we have to construct
295 the fundamental types on the fly, since no information about the
296 fundamental types is supplied. Each such fundamental type is created by
297 calling a language dependent routine to create the type, and then a
298 pointer to that type is then placed in the array at the index specified
299 by it's FT_<TYPENAME> value. The array has a fixed size set by the
300 FT_NUM_MEMBERS compile time constant, which is the number of predefined
301 fundamental types gdb knows how to construct. */
302 struct type
*ftypes
[FT_NUM_MEMBERS
]; /* Fundamental types */
304 /* DWARF abbreviation table associated with this compilation unit. */
305 struct abbrev_info
**dwarf2_abbrevs
;
307 /* Storage for the abbrev table. */
308 struct obstack abbrev_obstack
;
310 /* Hash table holding all the loaded partial DIEs. */
313 /* Storage for things with the same lifetime as this read-in compilation
314 unit, including partial DIEs. */
315 struct obstack comp_unit_obstack
;
317 /* When multiple dwarf2_cu structures are living in memory, this field
318 chains them all together, so that they can be released efficiently.
319 We will probably also want a generation counter so that most-recently-used
320 compilation units are cached... */
321 struct dwarf2_per_cu_data
*read_in_chain
;
323 /* Backchain to our per_cu entry if the tree has been built. */
324 struct dwarf2_per_cu_data
*per_cu
;
326 /* How many compilation units ago was this CU last referenced? */
329 /* A hash table of die offsets for following references. */
330 struct die_info
*die_ref_table
[REF_HASH_SIZE
];
332 /* Full DIEs if read in. */
333 struct die_info
*dies
;
335 /* A set of pointers to dwarf2_per_cu_data objects for compilation
336 units referenced by this one. Only set during full symbol processing;
337 partial symbol tables do not have dependencies. */
340 /* Header data from the line table, during full symbol processing. */
341 struct line_header
*line_header
;
343 /* Mark used when releasing cached dies. */
344 unsigned int mark
: 1;
346 /* This flag will be set if this compilation unit might include
347 inter-compilation-unit references. */
348 unsigned int has_form_ref_addr
: 1;
350 /* This flag will be set if this compilation unit includes any
351 DW_TAG_namespace DIEs. If we know that there are explicit
352 DIEs for namespaces, we don't need to try to infer them
353 from mangled names. */
354 unsigned int has_namespace_info
: 1;
357 /* Persistent data held for a compilation unit, even when not
358 processing it. We put a pointer to this structure in the
359 read_symtab_private field of the psymtab. If we encounter
360 inter-compilation-unit references, we also maintain a sorted
361 list of all compilation units. */
363 struct dwarf2_per_cu_data
365 /* The start offset and length of this compilation unit. 2**30-1
366 bytes should suffice to store the length of any compilation unit
367 - if it doesn't, GDB will fall over anyway. */
368 unsigned long offset
;
369 unsigned long length
: 30;
371 /* Flag indicating this compilation unit will be read in before
372 any of the current compilation units are processed. */
373 unsigned long queued
: 1;
375 /* This flag will be set if we need to load absolutely all DIEs
376 for this compilation unit, instead of just the ones we think
377 are interesting. It gets set if we look for a DIE in the
378 hash table and don't find it. */
379 unsigned int load_all_dies
: 1;
381 /* Set iff currently read in. */
382 struct dwarf2_cu
*cu
;
384 /* If full symbols for this CU have been read in, then this field
385 holds a map of DIE offsets to types. It isn't always possible
386 to reconstruct this information later, so we have to preserve
390 /* The partial symbol table associated with this compilation unit,
391 or NULL for partial units (which do not have an associated
393 struct partial_symtab
*psymtab
;
396 /* The line number information for a compilation unit (found in the
397 .debug_line section) begins with a "statement program header",
398 which contains the following information. */
401 unsigned int total_length
;
402 unsigned short version
;
403 unsigned int header_length
;
404 unsigned char minimum_instruction_length
;
405 unsigned char default_is_stmt
;
407 unsigned char line_range
;
408 unsigned char opcode_base
;
410 /* standard_opcode_lengths[i] is the number of operands for the
411 standard opcode whose value is i. This means that
412 standard_opcode_lengths[0] is unused, and the last meaningful
413 element is standard_opcode_lengths[opcode_base - 1]. */
414 unsigned char *standard_opcode_lengths
;
416 /* The include_directories table. NOTE! These strings are not
417 allocated with xmalloc; instead, they are pointers into
418 debug_line_buffer. If you try to free them, `free' will get
420 unsigned int num_include_dirs
, include_dirs_size
;
423 /* The file_names table. NOTE! These strings are not allocated
424 with xmalloc; instead, they are pointers into debug_line_buffer.
425 Don't try to free them directly. */
426 unsigned int num_file_names
, file_names_size
;
430 unsigned int dir_index
;
431 unsigned int mod_time
;
433 int included_p
; /* Non-zero if referenced by the Line Number Program. */
434 struct symtab
*symtab
; /* The associated symbol table, if any. */
437 /* The start and end of the statement program following this
438 header. These point into dwarf2_per_objfile->line_buffer. */
439 gdb_byte
*statement_program_start
, *statement_program_end
;
442 /* When we construct a partial symbol table entry we only
443 need this much information. */
444 struct partial_die_info
446 /* Offset of this DIE. */
449 /* DWARF-2 tag for this DIE. */
450 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
452 /* Language code associated with this DIE. This is only used
453 for the compilation unit DIE. */
454 unsigned int language
: 8;
456 /* Assorted flags describing the data found in this DIE. */
457 unsigned int has_children
: 1;
458 unsigned int is_external
: 1;
459 unsigned int is_declaration
: 1;
460 unsigned int has_type
: 1;
461 unsigned int has_specification
: 1;
462 unsigned int has_stmt_list
: 1;
463 unsigned int has_pc_info
: 1;
465 /* Flag set if the SCOPE field of this structure has been
467 unsigned int scope_set
: 1;
469 /* Flag set if the DIE has a byte_size attribute. */
470 unsigned int has_byte_size
: 1;
472 /* The name of this DIE. Normally the value of DW_AT_name, but
473 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
478 /* The scope to prepend to our children. This is generally
479 allocated on the comp_unit_obstack, so will disappear
480 when this compilation unit leaves the cache. */
483 /* The location description associated with this DIE, if any. */
484 struct dwarf_block
*locdesc
;
486 /* If HAS_PC_INFO, the PC range associated with this DIE. */
490 /* Pointer into the info_buffer pointing at the target of
491 DW_AT_sibling, if any. */
494 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
495 DW_AT_specification (or DW_AT_abstract_origin or
497 unsigned int spec_offset
;
499 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
500 unsigned int line_offset
;
502 /* Pointers to this DIE's parent, first child, and next sibling,
504 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
507 /* This data structure holds the information of an abbrev. */
510 unsigned int number
; /* number identifying abbrev */
511 enum dwarf_tag tag
; /* dwarf tag */
512 unsigned short has_children
; /* boolean */
513 unsigned short num_attrs
; /* number of attributes */
514 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
515 struct abbrev_info
*next
; /* next in chain */
520 enum dwarf_attribute name
;
521 enum dwarf_form form
;
524 /* This data structure holds a complete die structure. */
527 enum dwarf_tag tag
; /* Tag indicating type of die */
528 unsigned int abbrev
; /* Abbrev number */
529 unsigned int offset
; /* Offset in .debug_info section */
530 unsigned int num_attrs
; /* Number of attributes */
531 struct attribute
*attrs
; /* An array of attributes */
532 struct die_info
*next_ref
; /* Next die in ref hash table */
534 /* The dies in a compilation unit form an n-ary tree. PARENT
535 points to this die's parent; CHILD points to the first child of
536 this node; and all the children of a given node are chained
537 together via their SIBLING fields, terminated by a die whose
539 struct die_info
*child
; /* Its first child, if any. */
540 struct die_info
*sibling
; /* Its next sibling, if any. */
541 struct die_info
*parent
; /* Its parent, if any. */
543 struct type
*type
; /* Cached type information */
546 /* Attributes have a name and a value */
549 enum dwarf_attribute name
;
550 enum dwarf_form form
;
554 struct dwarf_block
*blk
;
562 struct function_range
565 CORE_ADDR lowpc
, highpc
;
567 struct function_range
*next
;
570 /* Get at parts of an attribute structure */
572 #define DW_STRING(attr) ((attr)->u.str)
573 #define DW_UNSND(attr) ((attr)->u.unsnd)
574 #define DW_BLOCK(attr) ((attr)->u.blk)
575 #define DW_SND(attr) ((attr)->u.snd)
576 #define DW_ADDR(attr) ((attr)->u.addr)
578 /* Blocks are a bunch of untyped bytes. */
585 #ifndef ATTR_ALLOC_CHUNK
586 #define ATTR_ALLOC_CHUNK 4
589 /* Allocate fields for structs, unions and enums in this size. */
590 #ifndef DW_FIELD_ALLOC_CHUNK
591 #define DW_FIELD_ALLOC_CHUNK 4
594 /* A zeroed version of a partial die for initialization purposes. */
595 static struct partial_die_info zeroed_partial_die
;
597 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
598 but this would require a corresponding change in unpack_field_as_long
600 static int bits_per_byte
= 8;
602 /* The routines that read and process dies for a C struct or C++ class
603 pass lists of data member fields and lists of member function fields
604 in an instance of a field_info structure, as defined below. */
607 /* List of data member and baseclasses fields. */
610 struct nextfield
*next
;
617 /* Number of fields. */
620 /* Number of baseclasses. */
623 /* Set if the accesibility of one of the fields is not public. */
624 int non_public_fields
;
626 /* Member function fields array, entries are allocated in the order they
627 are encountered in the object file. */
630 struct nextfnfield
*next
;
631 struct fn_field fnfield
;
635 /* Member function fieldlist array, contains name of possibly overloaded
636 member function, number of overloaded member functions and a pointer
637 to the head of the member function field chain. */
642 struct nextfnfield
*head
;
646 /* Number of entries in the fnfieldlists array. */
650 /* One item on the queue of compilation units to read in full symbols
652 struct dwarf2_queue_item
654 struct dwarf2_per_cu_data
*per_cu
;
655 struct dwarf2_queue_item
*next
;
658 /* The current queue. */
659 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
661 /* Loaded secondary compilation units are kept in memory until they
662 have not been referenced for the processing of this many
663 compilation units. Set this to zero to disable caching. Cache
664 sizes of up to at least twenty will improve startup time for
665 typical inter-CU-reference binaries, at an obvious memory cost. */
666 static int dwarf2_max_cache_age
= 5;
668 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
669 struct cmd_list_element
*c
, const char *value
)
671 fprintf_filtered (file
, _("\
672 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
677 /* Various complaints about symbol reading that don't abort the process */
680 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
682 complaint (&symfile_complaints
,
683 _("statement list doesn't fit in .debug_line section"));
687 dwarf2_debug_line_missing_file_complaint (void)
689 complaint (&symfile_complaints
,
690 _(".debug_line section has line data without a file"));
694 dwarf2_complex_location_expr_complaint (void)
696 complaint (&symfile_complaints
, _("location expression too complex"));
700 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
703 complaint (&symfile_complaints
,
704 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
709 dwarf2_macros_too_long_complaint (void)
711 complaint (&symfile_complaints
,
712 _("macro info runs off end of `.debug_macinfo' section"));
716 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
718 complaint (&symfile_complaints
,
719 _("macro debug info contains a malformed macro definition:\n`%s'"),
724 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
726 complaint (&symfile_complaints
,
727 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
730 /* local function prototypes */
732 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
735 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
738 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
741 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
742 struct partial_die_info
*,
743 struct partial_symtab
*);
745 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
747 static void scan_partial_symbols (struct partial_die_info
*,
748 CORE_ADDR
*, CORE_ADDR
*,
751 static void add_partial_symbol (struct partial_die_info
*,
754 static int pdi_needs_namespace (enum dwarf_tag tag
);
756 static void add_partial_namespace (struct partial_die_info
*pdi
,
757 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
758 struct dwarf2_cu
*cu
);
760 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
761 struct dwarf2_cu
*cu
);
763 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
766 struct dwarf2_cu
*cu
);
768 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
770 static void psymtab_to_symtab_1 (struct partial_symtab
*);
772 gdb_byte
*dwarf2_read_section (struct objfile
*, asection
*);
774 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
776 static void dwarf2_free_abbrev_table (void *);
778 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
781 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
784 static struct partial_die_info
*load_partial_dies (bfd
*, gdb_byte
*, int,
787 static gdb_byte
*read_partial_die (struct partial_die_info
*,
788 struct abbrev_info
*abbrev
, unsigned int,
789 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
791 static struct partial_die_info
*find_partial_die (unsigned long,
794 static void fixup_partial_die (struct partial_die_info
*,
797 static gdb_byte
*read_full_die (struct die_info
**, bfd
*, gdb_byte
*,
798 struct dwarf2_cu
*, int *);
800 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
801 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
803 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
804 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
806 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
808 static int read_1_signed_byte (bfd
*, gdb_byte
*);
810 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
812 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
814 static unsigned long read_8_bytes (bfd
*, gdb_byte
*);
816 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
819 static LONGEST
read_initial_length (bfd
*, gdb_byte
*,
820 struct comp_unit_head
*, unsigned int *);
822 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
825 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
827 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
829 static char *read_indirect_string (bfd
*, gdb_byte
*,
830 const struct comp_unit_head
*,
833 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
835 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
837 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
839 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
841 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
844 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
845 struct dwarf2_cu
*cu
);
847 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
849 static struct die_info
*die_specification (struct die_info
*die
,
852 static void free_line_header (struct line_header
*lh
);
854 static void add_file_name (struct line_header
*, char *, unsigned int,
855 unsigned int, unsigned int);
857 static struct line_header
*(dwarf_decode_line_header
858 (unsigned int offset
,
859 bfd
*abfd
, struct dwarf2_cu
*cu
));
861 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
862 struct dwarf2_cu
*, struct partial_symtab
*);
864 static void dwarf2_start_subfile (char *, char *, char *);
866 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
869 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
872 static void dwarf2_const_value_data (struct attribute
*attr
,
876 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
878 static struct type
*die_containing_type (struct die_info
*,
881 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
883 static void read_type_die (struct die_info
*, struct dwarf2_cu
*);
885 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
887 static char *typename_concat (struct obstack
*,
892 static void read_typedef (struct die_info
*, struct dwarf2_cu
*);
894 static void read_base_type (struct die_info
*, struct dwarf2_cu
*);
896 static void read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
898 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
900 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
902 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
904 static int dwarf2_get_pc_bounds (struct die_info
*,
905 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*);
907 static void get_scope_pc_bounds (struct die_info
*,
908 CORE_ADDR
*, CORE_ADDR
*,
911 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
914 static void dwarf2_attach_fields_to_type (struct field_info
*,
915 struct type
*, struct dwarf2_cu
*);
917 static void dwarf2_add_member_fn (struct field_info
*,
918 struct die_info
*, struct type
*,
921 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
922 struct type
*, struct dwarf2_cu
*);
924 static void read_structure_type (struct die_info
*, struct dwarf2_cu
*);
926 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
928 static char *determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
930 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
932 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
934 static const char *namespace_name (struct die_info
*die
,
935 int *is_anonymous
, struct dwarf2_cu
*);
937 static void read_enumeration_type (struct die_info
*, struct dwarf2_cu
*);
939 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
941 static struct type
*dwarf_base_type (int, int, struct dwarf2_cu
*);
943 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
945 static void read_array_type (struct die_info
*, struct dwarf2_cu
*);
947 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
950 static void read_tag_pointer_type (struct die_info
*, struct dwarf2_cu
*);
952 static void read_tag_ptr_to_member_type (struct die_info
*,
955 static void read_tag_reference_type (struct die_info
*, struct dwarf2_cu
*);
957 static void read_tag_const_type (struct die_info
*, struct dwarf2_cu
*);
959 static void read_tag_volatile_type (struct die_info
*, struct dwarf2_cu
*);
961 static void read_tag_string_type (struct die_info
*, struct dwarf2_cu
*);
963 static void read_subroutine_type (struct die_info
*, struct dwarf2_cu
*);
965 static struct die_info
*read_comp_unit (gdb_byte
*, bfd
*, struct dwarf2_cu
*);
967 static struct die_info
*read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
969 gdb_byte
**new_info_ptr
,
970 struct die_info
*parent
);
972 static struct die_info
*read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
974 gdb_byte
**new_info_ptr
,
975 struct die_info
*parent
);
977 static void free_die_list (struct die_info
*);
979 static void process_die (struct die_info
*, struct dwarf2_cu
*);
981 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
983 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
985 static struct die_info
*dwarf2_extension (struct die_info
*die
,
988 static char *dwarf_tag_name (unsigned int);
990 static char *dwarf_attr_name (unsigned int);
992 static char *dwarf_form_name (unsigned int);
994 static char *dwarf_stack_op_name (unsigned int);
996 static char *dwarf_bool_name (unsigned int);
998 static char *dwarf_type_encoding_name (unsigned int);
1001 static char *dwarf_cfi_name (unsigned int);
1003 struct die_info
*copy_die (struct die_info
*);
1006 static struct die_info
*sibling_die (struct die_info
*);
1008 static void dump_die (struct die_info
*);
1010 static void dump_die_list (struct die_info
*);
1012 static void store_in_ref_table (unsigned int, struct die_info
*,
1013 struct dwarf2_cu
*);
1015 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*,
1016 struct dwarf2_cu
*);
1018 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1020 static struct die_info
*follow_die_ref (struct die_info
*,
1022 struct dwarf2_cu
*);
1024 static struct type
*dwarf2_fundamental_type (struct objfile
*, int,
1025 struct dwarf2_cu
*);
1027 /* memory allocation interface */
1029 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1031 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1033 static struct die_info
*dwarf_alloc_die (void);
1035 static void initialize_cu_func_list (struct dwarf2_cu
*);
1037 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1038 struct dwarf2_cu
*);
1040 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1041 char *, bfd
*, struct dwarf2_cu
*);
1043 static int attr_form_is_block (struct attribute
*);
1045 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1047 struct dwarf2_cu
*cu
);
1049 static gdb_byte
*skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
1050 struct dwarf2_cu
*cu
);
1052 static void free_stack_comp_unit (void *);
1054 static hashval_t
partial_die_hash (const void *item
);
1056 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1058 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1059 (unsigned long offset
, struct objfile
*objfile
);
1061 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1062 (unsigned long offset
, struct objfile
*objfile
);
1064 static void free_one_comp_unit (void *);
1066 static void free_cached_comp_units (void *);
1068 static void age_cached_comp_units (void);
1070 static void free_one_cached_comp_unit (void *);
1072 static void set_die_type (struct die_info
*, struct type
*,
1073 struct dwarf2_cu
*);
1075 static void reset_die_and_siblings_types (struct die_info
*,
1076 struct dwarf2_cu
*);
1078 static void create_all_comp_units (struct objfile
*);
1080 static struct dwarf2_cu
*load_full_comp_unit (struct dwarf2_per_cu_data
*,
1083 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1085 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1086 struct dwarf2_per_cu_data
*);
1088 static void dwarf2_mark (struct dwarf2_cu
*);
1090 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1092 static void read_set_type (struct die_info
*, struct dwarf2_cu
*);
1095 /* Try to locate the sections we need for DWARF 2 debugging
1096 information and return true if we have enough to do something. */
1099 dwarf2_has_info (struct objfile
*objfile
)
1101 struct dwarf2_per_objfile
*data
;
1103 /* Initialize per-objfile state. */
1104 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1105 memset (data
, 0, sizeof (*data
));
1106 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1107 dwarf2_per_objfile
= data
;
1109 dwarf_info_section
= 0;
1110 dwarf_abbrev_section
= 0;
1111 dwarf_line_section
= 0;
1112 dwarf_str_section
= 0;
1113 dwarf_macinfo_section
= 0;
1114 dwarf_frame_section
= 0;
1115 dwarf_eh_frame_section
= 0;
1116 dwarf_ranges_section
= 0;
1117 dwarf_loc_section
= 0;
1119 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1120 return (dwarf_info_section
!= NULL
&& dwarf_abbrev_section
!= NULL
);
1123 /* This function is mapped across the sections and remembers the
1124 offset and size of each of the debugging sections we are interested
1128 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1130 if (strcmp (sectp
->name
, INFO_SECTION
) == 0)
1132 dwarf2_per_objfile
->info_size
= bfd_get_section_size (sectp
);
1133 dwarf_info_section
= sectp
;
1135 else if (strcmp (sectp
->name
, ABBREV_SECTION
) == 0)
1137 dwarf2_per_objfile
->abbrev_size
= bfd_get_section_size (sectp
);
1138 dwarf_abbrev_section
= sectp
;
1140 else if (strcmp (sectp
->name
, LINE_SECTION
) == 0)
1142 dwarf2_per_objfile
->line_size
= bfd_get_section_size (sectp
);
1143 dwarf_line_section
= sectp
;
1145 else if (strcmp (sectp
->name
, PUBNAMES_SECTION
) == 0)
1147 dwarf2_per_objfile
->pubnames_size
= bfd_get_section_size (sectp
);
1148 dwarf_pubnames_section
= sectp
;
1150 else if (strcmp (sectp
->name
, ARANGES_SECTION
) == 0)
1152 dwarf2_per_objfile
->aranges_size
= bfd_get_section_size (sectp
);
1153 dwarf_aranges_section
= sectp
;
1155 else if (strcmp (sectp
->name
, LOC_SECTION
) == 0)
1157 dwarf2_per_objfile
->loc_size
= bfd_get_section_size (sectp
);
1158 dwarf_loc_section
= sectp
;
1160 else if (strcmp (sectp
->name
, MACINFO_SECTION
) == 0)
1162 dwarf2_per_objfile
->macinfo_size
= bfd_get_section_size (sectp
);
1163 dwarf_macinfo_section
= sectp
;
1165 else if (strcmp (sectp
->name
, STR_SECTION
) == 0)
1167 dwarf2_per_objfile
->str_size
= bfd_get_section_size (sectp
);
1168 dwarf_str_section
= sectp
;
1170 else if (strcmp (sectp
->name
, FRAME_SECTION
) == 0)
1172 dwarf2_per_objfile
->frame_size
= bfd_get_section_size (sectp
);
1173 dwarf_frame_section
= sectp
;
1175 else if (strcmp (sectp
->name
, EH_FRAME_SECTION
) == 0)
1177 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1178 if (aflag
& SEC_HAS_CONTENTS
)
1180 dwarf2_per_objfile
->eh_frame_size
= bfd_get_section_size (sectp
);
1181 dwarf_eh_frame_section
= sectp
;
1184 else if (strcmp (sectp
->name
, RANGES_SECTION
) == 0)
1186 dwarf2_per_objfile
->ranges_size
= bfd_get_section_size (sectp
);
1187 dwarf_ranges_section
= sectp
;
1190 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1191 && bfd_section_vma (abfd
, sectp
) == 0)
1192 dwarf2_per_objfile
->has_section_at_zero
= 1;
1195 /* Build a partial symbol table. */
1198 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1200 /* We definitely need the .debug_info and .debug_abbrev sections */
1202 dwarf2_per_objfile
->info_buffer
= dwarf2_read_section (objfile
, dwarf_info_section
);
1203 dwarf2_per_objfile
->abbrev_buffer
= dwarf2_read_section (objfile
, dwarf_abbrev_section
);
1205 if (dwarf_line_section
)
1206 dwarf2_per_objfile
->line_buffer
= dwarf2_read_section (objfile
, dwarf_line_section
);
1208 dwarf2_per_objfile
->line_buffer
= NULL
;
1210 if (dwarf_str_section
)
1211 dwarf2_per_objfile
->str_buffer
= dwarf2_read_section (objfile
, dwarf_str_section
);
1213 dwarf2_per_objfile
->str_buffer
= NULL
;
1215 if (dwarf_macinfo_section
)
1216 dwarf2_per_objfile
->macinfo_buffer
= dwarf2_read_section (objfile
,
1217 dwarf_macinfo_section
);
1219 dwarf2_per_objfile
->macinfo_buffer
= NULL
;
1221 if (dwarf_ranges_section
)
1222 dwarf2_per_objfile
->ranges_buffer
= dwarf2_read_section (objfile
, dwarf_ranges_section
);
1224 dwarf2_per_objfile
->ranges_buffer
= NULL
;
1226 if (dwarf_loc_section
)
1227 dwarf2_per_objfile
->loc_buffer
= dwarf2_read_section (objfile
, dwarf_loc_section
);
1229 dwarf2_per_objfile
->loc_buffer
= NULL
;
1232 || (objfile
->global_psymbols
.size
== 0
1233 && objfile
->static_psymbols
.size
== 0))
1235 init_psymbol_list (objfile
, 1024);
1239 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1241 /* Things are significantly easier if we have .debug_aranges and
1242 .debug_pubnames sections */
1244 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1248 /* only test this case for now */
1250 /* In this case we have to work a bit harder */
1251 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1256 /* Build the partial symbol table from the information in the
1257 .debug_pubnames and .debug_aranges sections. */
1260 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1262 bfd
*abfd
= objfile
->obfd
;
1263 char *aranges_buffer
, *pubnames_buffer
;
1264 char *aranges_ptr
, *pubnames_ptr
;
1265 unsigned int entry_length
, version
, info_offset
, info_size
;
1267 pubnames_buffer
= dwarf2_read_section (objfile
,
1268 dwarf_pubnames_section
);
1269 pubnames_ptr
= pubnames_buffer
;
1270 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames_size
)
1272 struct comp_unit_head cu_header
;
1273 unsigned int bytes_read
;
1275 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
1277 pubnames_ptr
+= bytes_read
;
1278 version
= read_1_byte (abfd
, pubnames_ptr
);
1280 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1282 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1286 aranges_buffer
= dwarf2_read_section (objfile
,
1287 dwarf_aranges_section
);
1292 /* Read in the comp unit header information from the debug_info at
1296 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1297 gdb_byte
*info_ptr
, bfd
*abfd
)
1300 unsigned int bytes_read
;
1301 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
1303 info_ptr
+= bytes_read
;
1304 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1306 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1308 info_ptr
+= bytes_read
;
1309 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1311 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1312 if (signed_addr
< 0)
1313 internal_error (__FILE__
, __LINE__
,
1314 _("read_comp_unit_head: dwarf from non elf file"));
1315 cu_header
->signed_addr_p
= signed_addr
;
1320 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1323 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1325 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1327 if (header
->version
!= 2 && header
->version
!= 3)
1328 error (_("Dwarf Error: wrong version in compilation unit header "
1329 "(is %d, should be %d) [in module %s]"), header
->version
,
1330 2, bfd_get_filename (abfd
));
1332 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev_size
)
1333 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1334 "(offset 0x%lx + 6) [in module %s]"),
1335 (long) header
->abbrev_offset
,
1336 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1337 bfd_get_filename (abfd
));
1339 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1340 > dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1341 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1342 "(offset 0x%lx + 0) [in module %s]"),
1343 (long) header
->length
,
1344 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1345 bfd_get_filename (abfd
));
1350 /* Allocate a new partial symtab for file named NAME and mark this new
1351 partial symtab as being an include of PST. */
1354 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1355 struct objfile
*objfile
)
1357 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1359 subpst
->section_offsets
= pst
->section_offsets
;
1360 subpst
->textlow
= 0;
1361 subpst
->texthigh
= 0;
1363 subpst
->dependencies
= (struct partial_symtab
**)
1364 obstack_alloc (&objfile
->objfile_obstack
,
1365 sizeof (struct partial_symtab
*));
1366 subpst
->dependencies
[0] = pst
;
1367 subpst
->number_of_dependencies
= 1;
1369 subpst
->globals_offset
= 0;
1370 subpst
->n_global_syms
= 0;
1371 subpst
->statics_offset
= 0;
1372 subpst
->n_static_syms
= 0;
1373 subpst
->symtab
= NULL
;
1374 subpst
->read_symtab
= pst
->read_symtab
;
1377 /* No private part is necessary for include psymtabs. This property
1378 can be used to differentiate between such include psymtabs and
1379 the regular ones. */
1380 subpst
->read_symtab_private
= NULL
;
1383 /* Read the Line Number Program data and extract the list of files
1384 included by the source file represented by PST. Build an include
1385 partial symtab for each of these included files.
1387 This procedure assumes that there *is* a Line Number Program in
1388 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1389 before calling this procedure. */
1392 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1393 struct partial_die_info
*pdi
,
1394 struct partial_symtab
*pst
)
1396 struct objfile
*objfile
= cu
->objfile
;
1397 bfd
*abfd
= objfile
->obfd
;
1398 struct line_header
*lh
;
1400 lh
= dwarf_decode_line_header (pdi
->line_offset
, abfd
, cu
);
1402 return; /* No linetable, so no includes. */
1404 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1406 free_line_header (lh
);
1410 /* Build the partial symbol table by doing a quick pass through the
1411 .debug_info and .debug_abbrev sections. */
1414 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1416 /* Instead of reading this into a big buffer, we should probably use
1417 mmap() on architectures that support it. (FIXME) */
1418 bfd
*abfd
= objfile
->obfd
;
1420 gdb_byte
*beg_of_comp_unit
;
1421 struct partial_die_info comp_unit_die
;
1422 struct partial_symtab
*pst
;
1423 struct cleanup
*back_to
;
1424 CORE_ADDR lowpc
, highpc
, baseaddr
;
1426 info_ptr
= dwarf2_per_objfile
->info_buffer
;
1428 /* Any cached compilation units will be linked by the per-objfile
1429 read_in_chain. Make sure to free them when we're done. */
1430 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1432 create_all_comp_units (objfile
);
1434 /* Since the objects we're extracting from .debug_info vary in
1435 length, only the individual functions to extract them (like
1436 read_comp_unit_head and load_partial_die) can really know whether
1437 the buffer is large enough to hold another complete object.
1439 At the moment, they don't actually check that. If .debug_info
1440 holds just one extra byte after the last compilation unit's dies,
1441 then read_comp_unit_head will happily read off the end of the
1442 buffer. read_partial_die is similarly casual. Those functions
1445 For this loop condition, simply checking whether there's any data
1446 left at all should be sufficient. */
1447 while (info_ptr
< (dwarf2_per_objfile
->info_buffer
1448 + dwarf2_per_objfile
->info_size
))
1450 struct cleanup
*back_to_inner
;
1451 struct dwarf2_cu cu
;
1452 struct abbrev_info
*abbrev
;
1453 unsigned int bytes_read
;
1454 struct dwarf2_per_cu_data
*this_cu
;
1456 beg_of_comp_unit
= info_ptr
;
1458 memset (&cu
, 0, sizeof (cu
));
1460 obstack_init (&cu
.comp_unit_obstack
);
1462 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1464 cu
.objfile
= objfile
;
1465 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
, abfd
);
1467 /* Complete the cu_header */
1468 cu
.header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1469 cu
.header
.first_die_ptr
= info_ptr
;
1470 cu
.header
.cu_head_ptr
= beg_of_comp_unit
;
1472 cu
.list_in_scope
= &file_symbols
;
1474 /* Read the abbrevs for this compilation unit into a table */
1475 dwarf2_read_abbrevs (abfd
, &cu
);
1476 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1478 this_cu
= dwarf2_find_comp_unit (cu
.header
.offset
, objfile
);
1480 /* Read the compilation unit die */
1481 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, &cu
);
1482 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1483 abfd
, info_ptr
, &cu
);
1485 if (comp_unit_die
.tag
== DW_TAG_partial_unit
)
1487 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1488 + cu
.header
.initial_length_size
);
1489 do_cleanups (back_to_inner
);
1493 /* Set the language we're debugging */
1494 set_cu_language (comp_unit_die
.language
, &cu
);
1496 /* Allocate a new partial symbol table structure */
1497 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1498 comp_unit_die
.name
? comp_unit_die
.name
: "",
1499 comp_unit_die
.lowpc
,
1500 objfile
->global_psymbols
.next
,
1501 objfile
->static_psymbols
.next
);
1503 if (comp_unit_die
.dirname
)
1504 pst
->dirname
= xstrdup (comp_unit_die
.dirname
);
1506 pst
->read_symtab_private
= (char *) this_cu
;
1508 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1510 /* Store the function that reads in the rest of the symbol table */
1511 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1513 /* If this compilation unit was already read in, free the
1514 cached copy in order to read it in again. This is
1515 necessary because we skipped some symbols when we first
1516 read in the compilation unit (see load_partial_dies).
1517 This problem could be avoided, but the benefit is
1519 if (this_cu
->cu
!= NULL
)
1520 free_one_cached_comp_unit (this_cu
->cu
);
1522 cu
.per_cu
= this_cu
;
1524 /* Note that this is a pointer to our stack frame, being
1525 added to a global data structure. It will be cleaned up
1526 in free_stack_comp_unit when we finish with this
1527 compilation unit. */
1530 this_cu
->psymtab
= pst
;
1532 /* Check if comp unit has_children.
1533 If so, read the rest of the partial symbols from this comp unit.
1534 If not, there's no more debug_info for this comp unit. */
1535 if (comp_unit_die
.has_children
)
1537 struct partial_die_info
*first_die
;
1539 lowpc
= ((CORE_ADDR
) -1);
1540 highpc
= ((CORE_ADDR
) 0);
1542 first_die
= load_partial_dies (abfd
, info_ptr
, 1, &cu
);
1544 scan_partial_symbols (first_die
, &lowpc
, &highpc
, &cu
);
1546 /* If we didn't find a lowpc, set it to highpc to avoid
1547 complaints from `maint check'. */
1548 if (lowpc
== ((CORE_ADDR
) -1))
1551 /* If the compilation unit didn't have an explicit address range,
1552 then use the information extracted from its child dies. */
1553 if (! comp_unit_die
.has_pc_info
)
1555 comp_unit_die
.lowpc
= lowpc
;
1556 comp_unit_die
.highpc
= highpc
;
1559 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1560 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1562 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1563 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1564 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1565 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1566 sort_pst_symbols (pst
);
1568 /* If there is already a psymtab or symtab for a file of this
1569 name, remove it. (If there is a symtab, more drastic things
1570 also happen.) This happens in VxWorks. */
1571 free_named_symtabs (pst
->filename
);
1573 info_ptr
= beg_of_comp_unit
+ cu
.header
.length
1574 + cu
.header
.initial_length_size
;
1576 if (comp_unit_die
.has_stmt_list
)
1578 /* Get the list of files included in the current compilation unit,
1579 and build a psymtab for each of them. */
1580 dwarf2_build_include_psymtabs (&cu
, &comp_unit_die
, pst
);
1583 do_cleanups (back_to_inner
);
1585 do_cleanups (back_to
);
1588 /* Load the DIEs for a secondary CU into memory. */
1591 load_comp_unit (struct dwarf2_per_cu_data
*this_cu
, struct objfile
*objfile
)
1593 bfd
*abfd
= objfile
->obfd
;
1594 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
1595 struct partial_die_info comp_unit_die
;
1596 struct dwarf2_cu
*cu
;
1597 struct abbrev_info
*abbrev
;
1598 unsigned int bytes_read
;
1599 struct cleanup
*back_to
;
1601 info_ptr
= dwarf2_per_objfile
->info_buffer
+ this_cu
->offset
;
1602 beg_of_comp_unit
= info_ptr
;
1604 cu
= xmalloc (sizeof (struct dwarf2_cu
));
1605 memset (cu
, 0, sizeof (struct dwarf2_cu
));
1607 obstack_init (&cu
->comp_unit_obstack
);
1609 cu
->objfile
= objfile
;
1610 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
1612 /* Complete the cu_header. */
1613 cu
->header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1614 cu
->header
.first_die_ptr
= info_ptr
;
1615 cu
->header
.cu_head_ptr
= beg_of_comp_unit
;
1617 /* Read the abbrevs for this compilation unit into a table. */
1618 dwarf2_read_abbrevs (abfd
, cu
);
1619 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
1621 /* Read the compilation unit die. */
1622 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
1623 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1624 abfd
, info_ptr
, cu
);
1626 /* Set the language we're debugging. */
1627 set_cu_language (comp_unit_die
.language
, cu
);
1629 /* Link this compilation unit into the compilation unit tree. */
1631 cu
->per_cu
= this_cu
;
1633 /* Check if comp unit has_children.
1634 If so, read the rest of the partial symbols from this comp unit.
1635 If not, there's no more debug_info for this comp unit. */
1636 if (comp_unit_die
.has_children
)
1637 load_partial_dies (abfd
, info_ptr
, 0, cu
);
1639 do_cleanups (back_to
);
1642 /* Create a list of all compilation units in OBJFILE. We do this only
1643 if an inter-comp-unit reference is found; presumably if there is one,
1644 there will be many, and one will occur early in the .debug_info section.
1645 So there's no point in building this list incrementally. */
1648 create_all_comp_units (struct objfile
*objfile
)
1652 struct dwarf2_per_cu_data
**all_comp_units
;
1653 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info_buffer
;
1657 all_comp_units
= xmalloc (n_allocated
1658 * sizeof (struct dwarf2_per_cu_data
*));
1660 while (info_ptr
< dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1662 struct comp_unit_head cu_header
;
1663 gdb_byte
*beg_of_comp_unit
;
1664 struct dwarf2_per_cu_data
*this_cu
;
1665 unsigned long offset
;
1666 unsigned int bytes_read
;
1668 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
1670 /* Read just enough information to find out where the next
1671 compilation unit is. */
1672 cu_header
.initial_length_size
= 0;
1673 cu_header
.length
= read_initial_length (objfile
->obfd
, info_ptr
,
1674 &cu_header
, &bytes_read
);
1676 /* Save the compilation unit for later lookup. */
1677 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
1678 sizeof (struct dwarf2_per_cu_data
));
1679 memset (this_cu
, 0, sizeof (*this_cu
));
1680 this_cu
->offset
= offset
;
1681 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
1683 if (n_comp_units
== n_allocated
)
1686 all_comp_units
= xrealloc (all_comp_units
,
1688 * sizeof (struct dwarf2_per_cu_data
*));
1690 all_comp_units
[n_comp_units
++] = this_cu
;
1692 info_ptr
= info_ptr
+ this_cu
->length
;
1695 dwarf2_per_objfile
->all_comp_units
1696 = obstack_alloc (&objfile
->objfile_obstack
,
1697 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1698 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
1699 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1700 xfree (all_comp_units
);
1701 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
1704 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1705 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1709 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
1710 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
1712 struct objfile
*objfile
= cu
->objfile
;
1713 bfd
*abfd
= objfile
->obfd
;
1714 struct partial_die_info
*pdi
;
1716 /* Now, march along the PDI's, descending into ones which have
1717 interesting children but skipping the children of the other ones,
1718 until we reach the end of the compilation unit. */
1724 fixup_partial_die (pdi
, cu
);
1726 /* Anonymous namespaces have no name but have interesting
1727 children, so we need to look at them. Ditto for anonymous
1730 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
1731 || pdi
->tag
== DW_TAG_enumeration_type
)
1735 case DW_TAG_subprogram
:
1736 if (pdi
->has_pc_info
)
1738 if (pdi
->lowpc
< *lowpc
)
1740 *lowpc
= pdi
->lowpc
;
1742 if (pdi
->highpc
> *highpc
)
1744 *highpc
= pdi
->highpc
;
1746 if (!pdi
->is_declaration
)
1748 add_partial_symbol (pdi
, cu
);
1752 case DW_TAG_variable
:
1753 case DW_TAG_typedef
:
1754 case DW_TAG_union_type
:
1755 if (!pdi
->is_declaration
)
1757 add_partial_symbol (pdi
, cu
);
1760 case DW_TAG_class_type
:
1761 case DW_TAG_structure_type
:
1762 if (!pdi
->is_declaration
)
1764 add_partial_symbol (pdi
, cu
);
1767 case DW_TAG_enumeration_type
:
1768 if (!pdi
->is_declaration
)
1769 add_partial_enumeration (pdi
, cu
);
1771 case DW_TAG_base_type
:
1772 case DW_TAG_subrange_type
:
1773 /* File scope base type definitions are added to the partial
1775 add_partial_symbol (pdi
, cu
);
1777 case DW_TAG_namespace
:
1778 add_partial_namespace (pdi
, lowpc
, highpc
, cu
);
1785 /* If the die has a sibling, skip to the sibling. */
1787 pdi
= pdi
->die_sibling
;
1791 /* Functions used to compute the fully scoped name of a partial DIE.
1793 Normally, this is simple. For C++, the parent DIE's fully scoped
1794 name is concatenated with "::" and the partial DIE's name. For
1795 Java, the same thing occurs except that "." is used instead of "::".
1796 Enumerators are an exception; they use the scope of their parent
1797 enumeration type, i.e. the name of the enumeration type is not
1798 prepended to the enumerator.
1800 There are two complexities. One is DW_AT_specification; in this
1801 case "parent" means the parent of the target of the specification,
1802 instead of the direct parent of the DIE. The other is compilers
1803 which do not emit DW_TAG_namespace; in this case we try to guess
1804 the fully qualified name of structure types from their members'
1805 linkage names. This must be done using the DIE's children rather
1806 than the children of any DW_AT_specification target. We only need
1807 to do this for structures at the top level, i.e. if the target of
1808 any DW_AT_specification (if any; otherwise the DIE itself) does not
1811 /* Compute the scope prefix associated with PDI's parent, in
1812 compilation unit CU. The result will be allocated on CU's
1813 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1814 field. NULL is returned if no prefix is necessary. */
1816 partial_die_parent_scope (struct partial_die_info
*pdi
,
1817 struct dwarf2_cu
*cu
)
1819 char *grandparent_scope
;
1820 struct partial_die_info
*parent
, *real_pdi
;
1822 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1823 then this means the parent of the specification DIE. */
1826 while (real_pdi
->has_specification
)
1827 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
1829 parent
= real_pdi
->die_parent
;
1833 if (parent
->scope_set
)
1834 return parent
->scope
;
1836 fixup_partial_die (parent
, cu
);
1838 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
1840 if (parent
->tag
== DW_TAG_namespace
1841 || parent
->tag
== DW_TAG_structure_type
1842 || parent
->tag
== DW_TAG_class_type
1843 || parent
->tag
== DW_TAG_union_type
)
1845 if (grandparent_scope
== NULL
)
1846 parent
->scope
= parent
->name
;
1848 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
1851 else if (parent
->tag
== DW_TAG_enumeration_type
)
1852 /* Enumerators should not get the name of the enumeration as a prefix. */
1853 parent
->scope
= grandparent_scope
;
1856 /* FIXME drow/2004-04-01: What should we be doing with
1857 function-local names? For partial symbols, we should probably be
1859 complaint (&symfile_complaints
,
1860 _("unhandled containing DIE tag %d for DIE at %d"),
1861 parent
->tag
, pdi
->offset
);
1862 parent
->scope
= grandparent_scope
;
1865 parent
->scope_set
= 1;
1866 return parent
->scope
;
1869 /* Return the fully scoped name associated with PDI, from compilation unit
1870 CU. The result will be allocated with malloc. */
1872 partial_die_full_name (struct partial_die_info
*pdi
,
1873 struct dwarf2_cu
*cu
)
1877 parent_scope
= partial_die_parent_scope (pdi
, cu
);
1878 if (parent_scope
== NULL
)
1881 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
1885 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
1887 struct objfile
*objfile
= cu
->objfile
;
1890 const char *my_prefix
;
1891 const struct partial_symbol
*psym
= NULL
;
1893 int built_actual_name
= 0;
1895 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1899 if (pdi_needs_namespace (pdi
->tag
))
1901 actual_name
= partial_die_full_name (pdi
, cu
);
1903 built_actual_name
= 1;
1906 if (actual_name
== NULL
)
1907 actual_name
= pdi
->name
;
1911 case DW_TAG_subprogram
:
1912 if (pdi
->is_external
)
1914 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1915 mst_text, objfile); */
1916 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1917 VAR_DOMAIN
, LOC_BLOCK
,
1918 &objfile
->global_psymbols
,
1919 0, pdi
->lowpc
+ baseaddr
,
1920 cu
->language
, objfile
);
1924 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1925 mst_file_text, objfile); */
1926 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1927 VAR_DOMAIN
, LOC_BLOCK
,
1928 &objfile
->static_psymbols
,
1929 0, pdi
->lowpc
+ baseaddr
,
1930 cu
->language
, objfile
);
1933 case DW_TAG_variable
:
1934 if (pdi
->is_external
)
1937 Don't enter into the minimal symbol tables as there is
1938 a minimal symbol table entry from the ELF symbols already.
1939 Enter into partial symbol table if it has a location
1940 descriptor or a type.
1941 If the location descriptor is missing, new_symbol will create
1942 a LOC_UNRESOLVED symbol, the address of the variable will then
1943 be determined from the minimal symbol table whenever the variable
1945 The address for the partial symbol table entry is not
1946 used by GDB, but it comes in handy for debugging partial symbol
1950 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1951 if (pdi
->locdesc
|| pdi
->has_type
)
1952 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1953 VAR_DOMAIN
, LOC_STATIC
,
1954 &objfile
->global_psymbols
,
1956 cu
->language
, objfile
);
1960 /* Static Variable. Skip symbols without location descriptors. */
1961 if (pdi
->locdesc
== NULL
)
1963 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1964 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1965 mst_file_data, objfile); */
1966 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1967 VAR_DOMAIN
, LOC_STATIC
,
1968 &objfile
->static_psymbols
,
1970 cu
->language
, objfile
);
1973 case DW_TAG_typedef
:
1974 case DW_TAG_base_type
:
1975 case DW_TAG_subrange_type
:
1976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1977 VAR_DOMAIN
, LOC_TYPEDEF
,
1978 &objfile
->static_psymbols
,
1979 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1981 case DW_TAG_namespace
:
1982 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1983 VAR_DOMAIN
, LOC_TYPEDEF
,
1984 &objfile
->global_psymbols
,
1985 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1987 case DW_TAG_class_type
:
1988 case DW_TAG_structure_type
:
1989 case DW_TAG_union_type
:
1990 case DW_TAG_enumeration_type
:
1991 /* Skip external references. The DWARF standard says in the section
1992 about "Structure, Union, and Class Type Entries": "An incomplete
1993 structure, union or class type is represented by a structure,
1994 union or class entry that does not have a byte size attribute
1995 and that has a DW_AT_declaration attribute." */
1996 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
1999 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2000 static vs. global. */
2001 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2002 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2003 (cu
->language
== language_cplus
2004 || cu
->language
== language_java
)
2005 ? &objfile
->global_psymbols
2006 : &objfile
->static_psymbols
,
2007 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2009 if (cu
->language
== language_cplus
2010 || cu
->language
== language_java
2011 || cu
->language
== language_ada
)
2013 /* For C++ and Java, these implicitly act as typedefs as well. */
2014 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2015 VAR_DOMAIN
, LOC_TYPEDEF
,
2016 &objfile
->global_psymbols
,
2017 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2020 case DW_TAG_enumerator
:
2021 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2022 VAR_DOMAIN
, LOC_CONST
,
2023 (cu
->language
== language_cplus
2024 || cu
->language
== language_java
)
2025 ? &objfile
->global_psymbols
2026 : &objfile
->static_psymbols
,
2027 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2033 /* Check to see if we should scan the name for possible namespace
2034 info. Only do this if this is C++, if we don't have namespace
2035 debugging info in the file, if the psym is of an appropriate type
2036 (otherwise we'll have psym == NULL), and if we actually had a
2037 mangled name to begin with. */
2039 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2040 cases which do not set PSYM above? */
2042 if (cu
->language
== language_cplus
2043 && cu
->has_namespace_info
== 0
2045 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2046 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2049 if (built_actual_name
)
2050 xfree (actual_name
);
2053 /* Determine whether a die of type TAG living in a C++ class or
2054 namespace needs to have the name of the scope prepended to the
2055 name listed in the die. */
2058 pdi_needs_namespace (enum dwarf_tag tag
)
2062 case DW_TAG_namespace
:
2063 case DW_TAG_typedef
:
2064 case DW_TAG_class_type
:
2065 case DW_TAG_structure_type
:
2066 case DW_TAG_union_type
:
2067 case DW_TAG_enumeration_type
:
2068 case DW_TAG_enumerator
:
2075 /* Read a partial die corresponding to a namespace; also, add a symbol
2076 corresponding to that namespace to the symbol table. NAMESPACE is
2077 the name of the enclosing namespace. */
2080 add_partial_namespace (struct partial_die_info
*pdi
,
2081 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2082 struct dwarf2_cu
*cu
)
2084 struct objfile
*objfile
= cu
->objfile
;
2086 /* Add a symbol for the namespace. */
2088 add_partial_symbol (pdi
, cu
);
2090 /* Now scan partial symbols in that namespace. */
2092 if (pdi
->has_children
)
2093 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, cu
);
2096 /* See if we can figure out if the class lives in a namespace. We do
2097 this by looking for a member function; its demangled name will
2098 contain namespace info, if there is any. */
2101 guess_structure_name (struct partial_die_info
*struct_pdi
,
2102 struct dwarf2_cu
*cu
)
2104 if ((cu
->language
== language_cplus
2105 || cu
->language
== language_java
)
2106 && cu
->has_namespace_info
== 0
2107 && struct_pdi
->has_children
)
2109 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2110 what template types look like, because the demangler
2111 frequently doesn't give the same name as the debug info. We
2112 could fix this by only using the demangled name to get the
2113 prefix (but see comment in read_structure_type). */
2115 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2116 struct partial_die_info
*real_pdi
;
2118 /* If this DIE (this DIE's specification, if any) has a parent, then
2119 we should not do this. We'll prepend the parent's fully qualified
2120 name when we create the partial symbol. */
2122 real_pdi
= struct_pdi
;
2123 while (real_pdi
->has_specification
)
2124 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2126 if (real_pdi
->die_parent
!= NULL
)
2129 while (child_pdi
!= NULL
)
2131 if (child_pdi
->tag
== DW_TAG_subprogram
)
2133 char *actual_class_name
2134 = language_class_name_from_physname (cu
->language_defn
,
2136 if (actual_class_name
!= NULL
)
2139 = obsavestring (actual_class_name
,
2140 strlen (actual_class_name
),
2141 &cu
->comp_unit_obstack
);
2142 xfree (actual_class_name
);
2147 child_pdi
= child_pdi
->die_sibling
;
2152 /* Read a partial die corresponding to an enumeration type. */
2155 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2156 struct dwarf2_cu
*cu
)
2158 struct objfile
*objfile
= cu
->objfile
;
2159 bfd
*abfd
= objfile
->obfd
;
2160 struct partial_die_info
*pdi
;
2162 if (enum_pdi
->name
!= NULL
)
2163 add_partial_symbol (enum_pdi
, cu
);
2165 pdi
= enum_pdi
->die_child
;
2168 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2169 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2171 add_partial_symbol (pdi
, cu
);
2172 pdi
= pdi
->die_sibling
;
2176 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2177 Return the corresponding abbrev, or NULL if the number is zero (indicating
2178 an empty DIE). In either case *BYTES_READ will be set to the length of
2179 the initial number. */
2181 static struct abbrev_info
*
2182 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2183 struct dwarf2_cu
*cu
)
2185 bfd
*abfd
= cu
->objfile
->obfd
;
2186 unsigned int abbrev_number
;
2187 struct abbrev_info
*abbrev
;
2189 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2191 if (abbrev_number
== 0)
2194 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2197 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2198 bfd_get_filename (abfd
));
2204 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2205 pointer to the end of a series of DIEs, terminated by an empty
2206 DIE. Any children of the skipped DIEs will also be skipped. */
2209 skip_children (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2211 struct abbrev_info
*abbrev
;
2212 unsigned int bytes_read
;
2216 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2218 return info_ptr
+ bytes_read
;
2220 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
2224 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2225 should point just after the initial uleb128 of a DIE, and the
2226 abbrev corresponding to that skipped uleb128 should be passed in
2227 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2231 skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
2232 struct dwarf2_cu
*cu
)
2234 unsigned int bytes_read
;
2235 struct attribute attr
;
2236 bfd
*abfd
= cu
->objfile
->obfd
;
2237 unsigned int form
, i
;
2239 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2241 /* The only abbrev we care about is DW_AT_sibling. */
2242 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2244 read_attribute (&attr
, &abbrev
->attrs
[i
],
2245 abfd
, info_ptr
, cu
);
2246 if (attr
.form
== DW_FORM_ref_addr
)
2247 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2249 return dwarf2_per_objfile
->info_buffer
2250 + dwarf2_get_ref_die_offset (&attr
, cu
);
2253 /* If it isn't DW_AT_sibling, skip this attribute. */
2254 form
= abbrev
->attrs
[i
].form
;
2259 case DW_FORM_ref_addr
:
2260 info_ptr
+= cu
->header
.addr_size
;
2279 case DW_FORM_string
:
2280 read_string (abfd
, info_ptr
, &bytes_read
);
2281 info_ptr
+= bytes_read
;
2284 info_ptr
+= cu
->header
.offset_size
;
2287 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2288 info_ptr
+= bytes_read
;
2290 case DW_FORM_block1
:
2291 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2293 case DW_FORM_block2
:
2294 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2296 case DW_FORM_block4
:
2297 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2301 case DW_FORM_ref_udata
:
2302 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2304 case DW_FORM_indirect
:
2305 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2306 info_ptr
+= bytes_read
;
2307 /* We need to continue parsing from here, so just go back to
2309 goto skip_attribute
;
2312 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2313 dwarf_form_name (form
),
2314 bfd_get_filename (abfd
));
2318 if (abbrev
->has_children
)
2319 return skip_children (info_ptr
, cu
);
2324 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2325 the next DIE after ORIG_PDI. */
2328 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, gdb_byte
*info_ptr
,
2329 bfd
*abfd
, struct dwarf2_cu
*cu
)
2331 /* Do we know the sibling already? */
2333 if (orig_pdi
->sibling
)
2334 return orig_pdi
->sibling
;
2336 /* Are there any children to deal with? */
2338 if (!orig_pdi
->has_children
)
2341 /* Skip the children the long way. */
2343 return skip_children (info_ptr
, cu
);
2346 /* Expand this partial symbol table into a full symbol table. */
2349 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2351 /* FIXME: This is barely more than a stub. */
2356 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2362 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2363 gdb_flush (gdb_stdout
);
2366 /* Restore our global data. */
2367 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2368 dwarf2_objfile_data_key
);
2370 psymtab_to_symtab_1 (pst
);
2372 /* Finish up the debug error message. */
2374 printf_filtered (_("done.\n"));
2379 /* Add PER_CU to the queue. */
2382 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2384 struct dwarf2_queue_item
*item
;
2387 item
= xmalloc (sizeof (*item
));
2388 item
->per_cu
= per_cu
;
2391 if (dwarf2_queue
== NULL
)
2392 dwarf2_queue
= item
;
2394 dwarf2_queue_tail
->next
= item
;
2396 dwarf2_queue_tail
= item
;
2399 /* Process the queue. */
2402 process_queue (struct objfile
*objfile
)
2404 struct dwarf2_queue_item
*item
, *next_item
;
2406 /* Initially, there is just one item on the queue. Load its DIEs,
2407 and the DIEs of any other compilation units it requires,
2410 for (item
= dwarf2_queue
; item
!= NULL
; item
= item
->next
)
2412 /* Read in this compilation unit. This may add new items to
2413 the end of the queue. */
2414 load_full_comp_unit (item
->per_cu
, objfile
);
2416 item
->per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
2417 dwarf2_per_objfile
->read_in_chain
= item
->per_cu
;
2419 /* If this compilation unit has already had full symbols created,
2420 reset the TYPE fields in each DIE. */
2421 if (item
->per_cu
->type_hash
)
2422 reset_die_and_siblings_types (item
->per_cu
->cu
->dies
,
2426 /* Now everything left on the queue needs to be read in. Process
2427 them, one at a time, removing from the queue as we finish. */
2428 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2430 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2431 process_full_comp_unit (item
->per_cu
);
2433 item
->per_cu
->queued
= 0;
2434 next_item
= item
->next
;
2438 dwarf2_queue_tail
= NULL
;
2441 /* Free all allocated queue entries. This function only releases anything if
2442 an error was thrown; if the queue was processed then it would have been
2443 freed as we went along. */
2446 dwarf2_release_queue (void *dummy
)
2448 struct dwarf2_queue_item
*item
, *last
;
2450 item
= dwarf2_queue
;
2453 /* Anything still marked queued is likely to be in an
2454 inconsistent state, so discard it. */
2455 if (item
->per_cu
->queued
)
2457 if (item
->per_cu
->cu
!= NULL
)
2458 free_one_cached_comp_unit (item
->per_cu
->cu
);
2459 item
->per_cu
->queued
= 0;
2467 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2470 /* Read in full symbols for PST, and anything it depends on. */
2473 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2475 struct dwarf2_per_cu_data
*per_cu
;
2476 struct cleanup
*back_to
;
2479 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2480 if (!pst
->dependencies
[i
]->readin
)
2482 /* Inform about additional files that need to be read in. */
2485 /* FIXME: i18n: Need to make this a single string. */
2486 fputs_filtered (" ", gdb_stdout
);
2488 fputs_filtered ("and ", gdb_stdout
);
2490 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2491 wrap_here (""); /* Flush output */
2492 gdb_flush (gdb_stdout
);
2494 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2497 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
2501 /* It's an include file, no symbols to read for it.
2502 Everything is in the parent symtab. */
2507 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2509 queue_comp_unit (per_cu
);
2511 process_queue (pst
->objfile
);
2513 /* Age the cache, releasing compilation units that have not
2514 been used recently. */
2515 age_cached_comp_units ();
2517 do_cleanups (back_to
);
2520 /* Load the DIEs associated with PST and PER_CU into memory. */
2522 static struct dwarf2_cu
*
2523 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2525 bfd
*abfd
= objfile
->obfd
;
2526 struct dwarf2_cu
*cu
;
2527 unsigned long offset
;
2529 struct cleanup
*back_to
, *free_cu_cleanup
;
2530 struct attribute
*attr
;
2533 /* Set local variables from the partial symbol table info. */
2534 offset
= per_cu
->offset
;
2536 info_ptr
= dwarf2_per_objfile
->info_buffer
+ offset
;
2538 cu
= xmalloc (sizeof (struct dwarf2_cu
));
2539 memset (cu
, 0, sizeof (struct dwarf2_cu
));
2541 /* If an error occurs while loading, release our storage. */
2542 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
2544 cu
->objfile
= objfile
;
2546 /* read in the comp_unit header */
2547 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
2549 /* Read the abbrevs for this compilation unit */
2550 dwarf2_read_abbrevs (abfd
, cu
);
2551 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2553 cu
->header
.offset
= offset
;
2555 cu
->per_cu
= per_cu
;
2558 /* We use this obstack for block values in dwarf_alloc_block. */
2559 obstack_init (&cu
->comp_unit_obstack
);
2561 cu
->dies
= read_comp_unit (info_ptr
, abfd
, cu
);
2563 /* We try not to read any attributes in this function, because not
2564 all objfiles needed for references have been loaded yet, and symbol
2565 table processing isn't initialized. But we have to set the CU language,
2566 or we won't be able to build types correctly. */
2567 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
2569 set_cu_language (DW_UNSND (attr
), cu
);
2571 set_cu_language (language_minimal
, cu
);
2573 do_cleanups (back_to
);
2575 /* We've successfully allocated this compilation unit. Let our caller
2576 clean it up when finished with it. */
2577 discard_cleanups (free_cu_cleanup
);
2582 /* Generate full symbol information for PST and CU, whose DIEs have
2583 already been loaded into memory. */
2586 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2588 struct partial_symtab
*pst
= per_cu
->psymtab
;
2589 struct dwarf2_cu
*cu
= per_cu
->cu
;
2590 struct objfile
*objfile
= pst
->objfile
;
2591 bfd
*abfd
= objfile
->obfd
;
2592 CORE_ADDR lowpc
, highpc
;
2593 struct symtab
*symtab
;
2594 struct cleanup
*back_to
;
2595 struct attribute
*attr
;
2598 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2600 /* We're in the global namespace. */
2601 processing_current_prefix
= "";
2604 back_to
= make_cleanup (really_free_pendings
, NULL
);
2606 cu
->list_in_scope
= &file_symbols
;
2608 /* Find the base address of the compilation unit for range lists and
2609 location lists. It will normally be specified by DW_AT_low_pc.
2610 In DWARF-3 draft 4, the base address could be overridden by
2611 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2612 compilation units with discontinuous ranges. */
2614 cu
->header
.base_known
= 0;
2615 cu
->header
.base_address
= 0;
2617 attr
= dwarf2_attr (cu
->dies
, DW_AT_entry_pc
, cu
);
2620 cu
->header
.base_address
= DW_ADDR (attr
);
2621 cu
->header
.base_known
= 1;
2625 attr
= dwarf2_attr (cu
->dies
, DW_AT_low_pc
, cu
);
2628 cu
->header
.base_address
= DW_ADDR (attr
);
2629 cu
->header
.base_known
= 1;
2633 /* Do line number decoding in read_file_scope () */
2634 process_die (cu
->dies
, cu
);
2636 /* Some compilers don't define a DW_AT_high_pc attribute for the
2637 compilation unit. If the DW_AT_high_pc is missing, synthesize
2638 it, by scanning the DIE's below the compilation unit. */
2639 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
2641 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
2643 /* Set symtab language to language from DW_AT_language.
2644 If the compilation is from a C file generated by language preprocessors,
2645 do not set the language if it was already deduced by start_subfile. */
2647 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
2649 symtab
->language
= cu
->language
;
2651 pst
->symtab
= symtab
;
2654 do_cleanups (back_to
);
2657 /* Process a die and its children. */
2660 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
2664 case DW_TAG_padding
:
2666 case DW_TAG_compile_unit
:
2667 read_file_scope (die
, cu
);
2669 case DW_TAG_subprogram
:
2670 read_subroutine_type (die
, cu
);
2671 read_func_scope (die
, cu
);
2673 case DW_TAG_inlined_subroutine
:
2674 /* FIXME: These are ignored for now.
2675 They could be used to set breakpoints on all inlined instances
2676 of a function and make GDB `next' properly over inlined functions. */
2678 case DW_TAG_lexical_block
:
2679 case DW_TAG_try_block
:
2680 case DW_TAG_catch_block
:
2681 read_lexical_block_scope (die
, cu
);
2683 case DW_TAG_class_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 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
2803 name
= DW_STRING (attr
);
2806 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
2808 comp_dir
= DW_STRING (attr
);
2809 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
2811 comp_dir
= ldirname (name
);
2812 if (comp_dir
!= NULL
)
2813 make_cleanup (xfree
, comp_dir
);
2815 if (comp_dir
!= NULL
)
2817 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2818 directory, get rid of it. */
2819 char *cp
= strchr (comp_dir
, ':');
2821 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2828 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
2831 set_cu_language (DW_UNSND (attr
), cu
);
2834 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
2836 cu
->producer
= DW_STRING (attr
);
2838 /* We assume that we're processing GCC output. */
2839 processing_gcc_compilation
= 2;
2841 /* The compilation unit may be in a different language or objfile,
2842 zero out all remembered fundamental types. */
2843 memset (cu
->ftypes
, 0, FT_NUM_MEMBERS
* sizeof (struct type
*));
2845 start_symtab (name
, comp_dir
, lowpc
);
2846 record_debugformat ("DWARF 2");
2847 record_producer (cu
->producer
);
2849 initialize_cu_func_list (cu
);
2851 /* Decode line number information if present. We do this before
2852 processing child DIEs, so that the line header table is available
2853 for DW_AT_decl_file. */
2854 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2857 unsigned int line_offset
= DW_UNSND (attr
);
2858 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2861 cu
->line_header
= line_header
;
2862 make_cleanup (free_cu_line_header
, cu
);
2863 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
2867 /* Process all dies in compilation unit. */
2868 if (die
->child
!= NULL
)
2870 child_die
= die
->child
;
2871 while (child_die
&& child_die
->tag
)
2873 process_die (child_die
, cu
);
2874 child_die
= sibling_die (child_die
);
2878 /* Decode macro information, if present. Dwarf 2 macro information
2879 refers to information in the line number info statement program
2880 header, so we can only read it if we've read the header
2882 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
2883 if (attr
&& line_header
)
2885 unsigned int macro_offset
= DW_UNSND (attr
);
2886 dwarf_decode_macros (line_header
, macro_offset
,
2887 comp_dir
, abfd
, cu
);
2889 do_cleanups (back_to
);
2893 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
2894 struct dwarf2_cu
*cu
)
2896 struct function_range
*thisfn
;
2898 thisfn
= (struct function_range
*)
2899 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
2900 thisfn
->name
= name
;
2901 thisfn
->lowpc
= lowpc
;
2902 thisfn
->highpc
= highpc
;
2903 thisfn
->seen_line
= 0;
2904 thisfn
->next
= NULL
;
2906 if (cu
->last_fn
== NULL
)
2907 cu
->first_fn
= thisfn
;
2909 cu
->last_fn
->next
= thisfn
;
2911 cu
->last_fn
= thisfn
;
2915 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2917 struct objfile
*objfile
= cu
->objfile
;
2918 struct context_stack
*new;
2921 struct die_info
*child_die
;
2922 struct attribute
*attr
;
2924 const char *previous_prefix
= processing_current_prefix
;
2925 struct cleanup
*back_to
= NULL
;
2928 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2930 name
= dwarf2_linkage_name (die
, cu
);
2932 /* Ignore functions with missing or empty names and functions with
2933 missing or invalid low and high pc attributes. */
2934 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
2937 if (cu
->language
== language_cplus
2938 || cu
->language
== language_java
)
2940 struct die_info
*spec_die
= die_specification (die
, cu
);
2942 /* NOTE: carlton/2004-01-23: We have to be careful in the
2943 presence of DW_AT_specification. For example, with GCC 3.4,
2948 // Definition of N::foo.
2952 then we'll have a tree of DIEs like this:
2954 1: DW_TAG_compile_unit
2955 2: DW_TAG_namespace // N
2956 3: DW_TAG_subprogram // declaration of N::foo
2957 4: DW_TAG_subprogram // definition of N::foo
2958 DW_AT_specification // refers to die #3
2960 Thus, when processing die #4, we have to pretend that we're
2961 in the context of its DW_AT_specification, namely the contex
2964 if (spec_die
!= NULL
)
2966 char *specification_prefix
= determine_prefix (spec_die
, cu
);
2967 processing_current_prefix
= specification_prefix
;
2968 back_to
= make_cleanup (xfree
, specification_prefix
);
2975 /* Record the function range for dwarf_decode_lines. */
2976 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
2978 new = push_context (0, lowpc
);
2979 new->name
= new_symbol (die
, die
->type
, cu
);
2981 /* If there is a location expression for DW_AT_frame_base, record
2983 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
2985 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2986 expression is being recorded directly in the function's symbol
2987 and not in a separate frame-base object. I guess this hack is
2988 to avoid adding some sort of frame-base adjunct/annex to the
2989 function's symbol :-(. The problem with doing this is that it
2990 results in a function symbol with a location expression that
2991 has nothing to do with the location of the function, ouch! The
2992 relationship should be: a function's symbol has-a frame base; a
2993 frame-base has-a location expression. */
2994 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
2996 cu
->list_in_scope
= &local_symbols
;
2998 if (die
->child
!= NULL
)
3000 child_die
= die
->child
;
3001 while (child_die
&& child_die
->tag
)
3003 process_die (child_die
, cu
);
3004 child_die
= sibling_die (child_die
);
3008 new = pop_context ();
3009 /* Make a block for the local symbols within. */
3010 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3011 lowpc
, highpc
, objfile
);
3013 /* In C++, we can have functions nested inside functions (e.g., when
3014 a function declares a class that has methods). This means that
3015 when we finish processing a function scope, we may need to go
3016 back to building a containing block's symbol lists. */
3017 local_symbols
= new->locals
;
3018 param_symbols
= new->params
;
3020 /* If we've finished processing a top-level function, subsequent
3021 symbols go in the file symbol list. */
3022 if (outermost_context_p ())
3023 cu
->list_in_scope
= &file_symbols
;
3025 processing_current_prefix
= previous_prefix
;
3026 if (back_to
!= NULL
)
3027 do_cleanups (back_to
);
3030 /* Process all the DIES contained within a lexical block scope. Start
3031 a new scope, process the dies, and then close the scope. */
3034 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3036 struct objfile
*objfile
= cu
->objfile
;
3037 struct context_stack
*new;
3038 CORE_ADDR lowpc
, highpc
;
3039 struct die_info
*child_die
;
3042 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3044 /* Ignore blocks with missing or invalid low and high pc attributes. */
3045 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3046 as multiple lexical blocks? Handling children in a sane way would
3047 be nasty. Might be easier to properly extend generic blocks to
3049 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3054 push_context (0, lowpc
);
3055 if (die
->child
!= NULL
)
3057 child_die
= die
->child
;
3058 while (child_die
&& child_die
->tag
)
3060 process_die (child_die
, cu
);
3061 child_die
= sibling_die (child_die
);
3064 new = pop_context ();
3066 if (local_symbols
!= NULL
)
3068 finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3071 local_symbols
= new->locals
;
3074 /* Get low and high pc attributes from a die. Return 1 if the attributes
3075 are present and valid, otherwise, return 0. Return -1 if the range is
3076 discontinuous, i.e. derived from DW_AT_ranges information. */
3078 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3079 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3081 struct objfile
*objfile
= cu
->objfile
;
3082 struct comp_unit_head
*cu_header
= &cu
->header
;
3083 struct attribute
*attr
;
3084 bfd
*obfd
= objfile
->obfd
;
3089 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3092 high
= DW_ADDR (attr
);
3093 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3095 low
= DW_ADDR (attr
);
3097 /* Found high w/o low attribute. */
3100 /* Found consecutive range of addresses. */
3105 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3108 unsigned int addr_size
= cu_header
->addr_size
;
3109 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3110 /* Value of the DW_AT_ranges attribute is the offset in the
3111 .debug_ranges section. */
3112 unsigned int offset
= DW_UNSND (attr
);
3113 /* Base address selection entry. */
3121 found_base
= cu_header
->base_known
;
3122 base
= cu_header
->base_address
;
3124 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3126 complaint (&symfile_complaints
,
3127 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3131 buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3133 /* Read in the largest possible address. */
3134 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3135 if ((marker
& mask
) == mask
)
3137 /* If we found the largest possible address, then
3138 read the base address. */
3139 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3140 buffer
+= 2 * addr_size
;
3141 offset
+= 2 * addr_size
;
3149 CORE_ADDR range_beginning
, range_end
;
3151 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3152 buffer
+= addr_size
;
3153 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3154 buffer
+= addr_size
;
3155 offset
+= 2 * addr_size
;
3157 /* An end of list marker is a pair of zero addresses. */
3158 if (range_beginning
== 0 && range_end
== 0)
3159 /* Found the end of list entry. */
3162 /* Each base address selection entry is a pair of 2 values.
3163 The first is the largest possible address, the second is
3164 the base address. Check for a base address here. */
3165 if ((range_beginning
& mask
) == mask
)
3167 /* If we found the largest possible address, then
3168 read the base address. */
3169 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3176 /* We have no valid base address for the ranges
3178 complaint (&symfile_complaints
,
3179 _("Invalid .debug_ranges data (no base address)"));
3183 range_beginning
+= base
;
3186 /* FIXME: This is recording everything as a low-high
3187 segment of consecutive addresses. We should have a
3188 data structure for discontiguous block ranges
3192 low
= range_beginning
;
3198 if (range_beginning
< low
)
3199 low
= range_beginning
;
3200 if (range_end
> high
)
3206 /* If the first entry is an end-of-list marker, the range
3207 describes an empty scope, i.e. no instructions. */
3217 /* When using the GNU linker, .gnu.linkonce. sections are used to
3218 eliminate duplicate copies of functions and vtables and such.
3219 The linker will arbitrarily choose one and discard the others.
3220 The AT_*_pc values for such functions refer to local labels in
3221 these sections. If the section from that file was discarded, the
3222 labels are not in the output, so the relocs get a value of 0.
3223 If this is a discarded function, mark the pc bounds as invalid,
3224 so that GDB will ignore it. */
3225 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3233 /* Get the low and high pc's represented by the scope DIE, and store
3234 them in *LOWPC and *HIGHPC. If the correct values can't be
3235 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3238 get_scope_pc_bounds (struct die_info
*die
,
3239 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3240 struct dwarf2_cu
*cu
)
3242 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3243 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3244 CORE_ADDR current_low
, current_high
;
3246 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3248 best_low
= current_low
;
3249 best_high
= current_high
;
3253 struct die_info
*child
= die
->child
;
3255 while (child
&& child
->tag
)
3257 switch (child
->tag
) {
3258 case DW_TAG_subprogram
:
3259 if (dwarf2_get_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
))
3261 best_low
= min (best_low
, current_low
);
3262 best_high
= max (best_high
, current_high
);
3265 case DW_TAG_namespace
:
3266 /* FIXME: carlton/2004-01-16: Should we do this for
3267 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3268 that current GCC's always emit the DIEs corresponding
3269 to definitions of methods of classes as children of a
3270 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3271 the DIEs giving the declarations, which could be
3272 anywhere). But I don't see any reason why the
3273 standards says that they have to be there. */
3274 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3276 if (current_low
!= ((CORE_ADDR
) -1))
3278 best_low
= min (best_low
, current_low
);
3279 best_high
= max (best_high
, current_high
);
3287 child
= sibling_die (child
);
3292 *highpc
= best_high
;
3295 /* Add an aggregate field to the field list. */
3298 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3299 struct dwarf2_cu
*cu
)
3301 struct objfile
*objfile
= cu
->objfile
;
3302 struct nextfield
*new_field
;
3303 struct attribute
*attr
;
3305 char *fieldname
= "";
3307 /* Allocate a new field list entry and link it in. */
3308 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3309 make_cleanup (xfree
, new_field
);
3310 memset (new_field
, 0, sizeof (struct nextfield
));
3311 new_field
->next
= fip
->fields
;
3312 fip
->fields
= new_field
;
3315 /* Handle accessibility and virtuality of field.
3316 The default accessibility for members is public, the default
3317 accessibility for inheritance is private. */
3318 if (die
->tag
!= DW_TAG_inheritance
)
3319 new_field
->accessibility
= DW_ACCESS_public
;
3321 new_field
->accessibility
= DW_ACCESS_private
;
3322 new_field
->virtuality
= DW_VIRTUALITY_none
;
3324 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3326 new_field
->accessibility
= DW_UNSND (attr
);
3327 if (new_field
->accessibility
!= DW_ACCESS_public
)
3328 fip
->non_public_fields
= 1;
3329 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3331 new_field
->virtuality
= DW_UNSND (attr
);
3333 fp
= &new_field
->field
;
3335 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3337 /* Data member other than a C++ static data member. */
3339 /* Get type of field. */
3340 fp
->type
= die_type (die
, cu
);
3342 FIELD_STATIC_KIND (*fp
) = 0;
3344 /* Get bit size of field (zero if none). */
3345 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3348 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3352 FIELD_BITSIZE (*fp
) = 0;
3355 /* Get bit offset of field. */
3356 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3359 FIELD_BITPOS (*fp
) =
3360 decode_locdesc (DW_BLOCK (attr
), cu
) * bits_per_byte
;
3363 FIELD_BITPOS (*fp
) = 0;
3364 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
3367 if (BITS_BIG_ENDIAN
)
3369 /* For big endian bits, the DW_AT_bit_offset gives the
3370 additional bit offset from the MSB of the containing
3371 anonymous object to the MSB of the field. We don't
3372 have to do anything special since we don't need to
3373 know the size of the anonymous object. */
3374 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
3378 /* For little endian bits, compute the bit offset to the
3379 MSB of the anonymous object, subtract off the number of
3380 bits from the MSB of the field to the MSB of the
3381 object, and then subtract off the number of bits of
3382 the field itself. The result is the bit offset of
3383 the LSB of the field. */
3385 int bit_offset
= DW_UNSND (attr
);
3387 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3390 /* The size of the anonymous object containing
3391 the bit field is explicit, so use the
3392 indicated size (in bytes). */
3393 anonymous_size
= DW_UNSND (attr
);
3397 /* The size of the anonymous object containing
3398 the bit field must be inferred from the type
3399 attribute of the data member containing the
3401 anonymous_size
= TYPE_LENGTH (fp
->type
);
3403 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
3404 - bit_offset
- FIELD_BITSIZE (*fp
);
3408 /* Get name of field. */
3409 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3410 if (attr
&& DW_STRING (attr
))
3411 fieldname
= DW_STRING (attr
);
3413 /* The name is already allocated along with this objfile, so we don't
3414 need to duplicate it for the type. */
3415 fp
->name
= fieldname
;
3417 /* Change accessibility for artificial fields (e.g. virtual table
3418 pointer or virtual base class pointer) to private. */
3419 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
3421 new_field
->accessibility
= DW_ACCESS_private
;
3422 fip
->non_public_fields
= 1;
3425 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
3427 /* C++ static member. */
3429 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3430 is a declaration, but all versions of G++ as of this writing
3431 (so through at least 3.2.1) incorrectly generate
3432 DW_TAG_variable tags. */
3436 /* Get name of field. */
3437 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3438 if (attr
&& DW_STRING (attr
))
3439 fieldname
= DW_STRING (attr
);
3443 /* Get physical name. */
3444 physname
= dwarf2_linkage_name (die
, cu
);
3446 /* The name is already allocated along with this objfile, so we don't
3447 need to duplicate it for the type. */
3448 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
3449 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3450 FIELD_NAME (*fp
) = fieldname
;
3452 else if (die
->tag
== DW_TAG_inheritance
)
3454 /* C++ base class field. */
3455 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3457 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), cu
)
3459 FIELD_BITSIZE (*fp
) = 0;
3460 FIELD_STATIC_KIND (*fp
) = 0;
3461 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3462 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
3463 fip
->nbaseclasses
++;
3467 /* Create the vector of fields, and attach it to the type. */
3470 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3471 struct dwarf2_cu
*cu
)
3473 int nfields
= fip
->nfields
;
3475 /* Record the field count, allocate space for the array of fields,
3476 and create blank accessibility bitfields if necessary. */
3477 TYPE_NFIELDS (type
) = nfields
;
3478 TYPE_FIELDS (type
) = (struct field
*)
3479 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3480 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3482 if (fip
->non_public_fields
)
3484 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3486 TYPE_FIELD_PRIVATE_BITS (type
) =
3487 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3488 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3490 TYPE_FIELD_PROTECTED_BITS (type
) =
3491 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3492 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3494 TYPE_FIELD_IGNORE_BITS (type
) =
3495 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3496 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3499 /* If the type has baseclasses, allocate and clear a bit vector for
3500 TYPE_FIELD_VIRTUAL_BITS. */
3501 if (fip
->nbaseclasses
)
3503 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
3504 unsigned char *pointer
;
3506 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3507 pointer
= TYPE_ALLOC (type
, num_bytes
);
3508 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
3509 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
3510 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
3513 /* Copy the saved-up fields into the field vector. Start from the head
3514 of the list, adding to the tail of the field array, so that they end
3515 up in the same order in the array in which they were added to the list. */
3516 while (nfields
-- > 0)
3518 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
3519 switch (fip
->fields
->accessibility
)
3521 case DW_ACCESS_private
:
3522 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3525 case DW_ACCESS_protected
:
3526 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3529 case DW_ACCESS_public
:
3533 /* Unknown accessibility. Complain and treat it as public. */
3535 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
3536 fip
->fields
->accessibility
);
3540 if (nfields
< fip
->nbaseclasses
)
3542 switch (fip
->fields
->virtuality
)
3544 case DW_VIRTUALITY_virtual
:
3545 case DW_VIRTUALITY_pure_virtual
:
3546 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
3550 fip
->fields
= fip
->fields
->next
;
3554 /* Add a member function to the proper fieldlist. */
3557 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
3558 struct type
*type
, struct dwarf2_cu
*cu
)
3560 struct objfile
*objfile
= cu
->objfile
;
3561 struct attribute
*attr
;
3562 struct fnfieldlist
*flp
;
3564 struct fn_field
*fnp
;
3567 struct nextfnfield
*new_fnfield
;
3569 /* Get name of member function. */
3570 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3571 if (attr
&& DW_STRING (attr
))
3572 fieldname
= DW_STRING (attr
);
3576 /* Get the mangled name. */
3577 physname
= dwarf2_linkage_name (die
, cu
);
3579 /* Look up member function name in fieldlist. */
3580 for (i
= 0; i
< fip
->nfnfields
; i
++)
3582 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
3586 /* Create new list element if necessary. */
3587 if (i
< fip
->nfnfields
)
3588 flp
= &fip
->fnfieldlists
[i
];
3591 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3593 fip
->fnfieldlists
= (struct fnfieldlist
*)
3594 xrealloc (fip
->fnfieldlists
,
3595 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
3596 * sizeof (struct fnfieldlist
));
3597 if (fip
->nfnfields
== 0)
3598 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
3600 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
3601 flp
->name
= fieldname
;
3607 /* Create a new member function field and chain it to the field list
3609 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
3610 make_cleanup (xfree
, new_fnfield
);
3611 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
3612 new_fnfield
->next
= flp
->head
;
3613 flp
->head
= new_fnfield
;
3616 /* Fill in the member function field info. */
3617 fnp
= &new_fnfield
->fnfield
;
3618 /* The name is already allocated along with this objfile, so we don't
3619 need to duplicate it for the type. */
3620 fnp
->physname
= physname
? physname
: "";
3621 fnp
->type
= alloc_type (objfile
);
3622 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
3624 int nparams
= TYPE_NFIELDS (die
->type
);
3626 /* TYPE is the domain of this method, and DIE->TYPE is the type
3627 of the method itself (TYPE_CODE_METHOD). */
3628 smash_to_method_type (fnp
->type
, type
,
3629 TYPE_TARGET_TYPE (die
->type
),
3630 TYPE_FIELDS (die
->type
),
3631 TYPE_NFIELDS (die
->type
),
3632 TYPE_VARARGS (die
->type
));
3634 /* Handle static member functions.
3635 Dwarf2 has no clean way to discern C++ static and non-static
3636 member functions. G++ helps GDB by marking the first
3637 parameter for non-static member functions (which is the
3638 this pointer) as artificial. We obtain this information
3639 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3640 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
3641 fnp
->voffset
= VOFFSET_STATIC
;
3644 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
3647 /* Get fcontext from DW_AT_containing_type if present. */
3648 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3649 fnp
->fcontext
= die_containing_type (die
, cu
);
3651 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3652 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3654 /* Get accessibility. */
3655 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3658 switch (DW_UNSND (attr
))
3660 case DW_ACCESS_private
:
3661 fnp
->is_private
= 1;
3663 case DW_ACCESS_protected
:
3664 fnp
->is_protected
= 1;
3669 /* Check for artificial methods. */
3670 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
3671 if (attr
&& DW_UNSND (attr
) != 0)
3672 fnp
->is_artificial
= 1;
3674 /* Get index in virtual function table if it is a virtual member function. */
3675 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
3678 /* Support the .debug_loc offsets */
3679 if (attr_form_is_block (attr
))
3681 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
3683 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
3685 dwarf2_complex_location_expr_complaint ();
3689 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3695 /* Create the vector of member function fields, and attach it to the type. */
3698 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
3699 struct dwarf2_cu
*cu
)
3701 struct fnfieldlist
*flp
;
3702 int total_length
= 0;
3705 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3706 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
3707 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
3709 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
3711 struct nextfnfield
*nfp
= flp
->head
;
3712 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
3715 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
3716 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
3717 fn_flp
->fn_fields
= (struct fn_field
*)
3718 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
3719 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
3720 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
3722 total_length
+= flp
->length
;
3725 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
3726 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
3729 /* Returns non-zero if NAME is the name of a vtable member in CU's
3730 language, zero otherwise. */
3732 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
3734 static const char vptr
[] = "_vptr";
3735 static const char vtable
[] = "vtable";
3737 /* Look for the C++ and Java forms of the vtable. */
3738 if ((cu
->language
== language_java
3739 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
3740 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
3741 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
3747 /* GCC outputs unnamed structures that are really pointers to member
3748 functions, with the ABI-specified layout. If DIE (from CU) describes
3749 such a structure, set its type, and return nonzero. Otherwise return
3752 GCC shouldn't do this; it should just output pointer to member DIEs.
3753 This is GCC PR debug/28767. */
3756 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
3758 struct objfile
*objfile
= cu
->objfile
;
3760 struct die_info
*pfn_die
, *delta_die
;
3761 struct attribute
*pfn_name
, *delta_name
;
3762 struct type
*pfn_type
, *domain_type
;
3764 /* Check for a structure with no name and two children. */
3765 if (die
->tag
!= DW_TAG_structure_type
3766 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
3767 || die
->child
== NULL
3768 || die
->child
->sibling
== NULL
3769 || (die
->child
->sibling
->sibling
!= NULL
3770 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
3773 /* Check for __pfn and __delta members. */
3774 pfn_die
= die
->child
;
3775 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
3776 if (pfn_die
->tag
!= DW_TAG_member
3778 || DW_STRING (pfn_name
) == NULL
3779 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
3782 delta_die
= pfn_die
->sibling
;
3783 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
3784 if (delta_die
->tag
!= DW_TAG_member
3785 || delta_name
== NULL
3786 || DW_STRING (delta_name
) == NULL
3787 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
3790 /* Find the type of the method. */
3791 pfn_type
= die_type (pfn_die
, cu
);
3792 if (pfn_type
== NULL
3793 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
3794 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
3797 /* Look for the "this" argument. */
3798 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
3799 if (TYPE_NFIELDS (pfn_type
) == 0
3800 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
3803 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
3804 type
= alloc_type (objfile
);
3805 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
3806 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
3807 TYPE_VARARGS (pfn_type
));
3808 type
= lookup_methodptr_type (type
);
3809 set_die_type (die
, type
, cu
);
3814 /* Called when we find the DIE that starts a structure or union scope
3815 (definition) to process all dies that define the members of the
3818 NOTE: we need to call struct_type regardless of whether or not the
3819 DIE has an at_name attribute, since it might be an anonymous
3820 structure or union. This gets the type entered into our set of
3823 However, if the structure is incomplete (an opaque struct/union)
3824 then suppress creating a symbol table entry for it since gdb only
3825 wants to find the one with the complete definition. Note that if
3826 it is complete, we just call new_symbol, which does it's own
3827 checking about whether the struct/union is anonymous or not (and
3828 suppresses creating a symbol table entry itself). */
3831 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
3833 struct objfile
*objfile
= cu
->objfile
;
3835 struct attribute
*attr
;
3836 const char *previous_prefix
= processing_current_prefix
;
3837 struct cleanup
*back_to
= NULL
;
3842 if (quirk_gcc_member_function_pointer (die
, cu
))
3845 type
= alloc_type (objfile
);
3846 INIT_CPLUS_SPECIFIC (type
);
3847 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3848 if (attr
&& DW_STRING (attr
))
3850 if (cu
->language
== language_cplus
3851 || cu
->language
== language_java
)
3853 char *new_prefix
= determine_class_name (die
, cu
);
3854 TYPE_TAG_NAME (type
) = obsavestring (new_prefix
,
3855 strlen (new_prefix
),
3856 &objfile
->objfile_obstack
);
3857 back_to
= make_cleanup (xfree
, new_prefix
);
3858 processing_current_prefix
= new_prefix
;
3862 /* The name is already allocated along with this objfile, so
3863 we don't need to duplicate it for the type. */
3864 TYPE_TAG_NAME (type
) = DW_STRING (attr
);
3868 if (die
->tag
== DW_TAG_structure_type
)
3870 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
3872 else if (die
->tag
== DW_TAG_union_type
)
3874 TYPE_CODE (type
) = TYPE_CODE_UNION
;
3878 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
3880 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
3883 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3886 TYPE_LENGTH (type
) = DW_UNSND (attr
);
3890 TYPE_LENGTH (type
) = 0;
3893 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB_SUPPORTED
;
3894 if (die_is_declaration (die
, cu
))
3895 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
3897 /* We need to add the type field to the die immediately so we don't
3898 infinitely recurse when dealing with pointers to the structure
3899 type within the structure itself. */
3900 set_die_type (die
, type
, cu
);
3902 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
3904 struct field_info fi
;
3905 struct die_info
*child_die
;
3906 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3908 memset (&fi
, 0, sizeof (struct field_info
));
3910 child_die
= die
->child
;
3912 while (child_die
&& child_die
->tag
)
3914 if (child_die
->tag
== DW_TAG_member
3915 || child_die
->tag
== DW_TAG_variable
)
3917 /* NOTE: carlton/2002-11-05: A C++ static data member
3918 should be a DW_TAG_member that is a declaration, but
3919 all versions of G++ as of this writing (so through at
3920 least 3.2.1) incorrectly generate DW_TAG_variable
3921 tags for them instead. */
3922 dwarf2_add_field (&fi
, child_die
, cu
);
3924 else if (child_die
->tag
== DW_TAG_subprogram
)
3926 /* C++ member function. */
3927 read_type_die (child_die
, cu
);
3928 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
3930 else if (child_die
->tag
== DW_TAG_inheritance
)
3932 /* C++ base class field. */
3933 dwarf2_add_field (&fi
, child_die
, cu
);
3935 child_die
= sibling_die (child_die
);
3938 /* Attach fields and member functions to the type. */
3940 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
3943 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
3945 /* Get the type which refers to the base class (possibly this
3946 class itself) which contains the vtable pointer for the current
3947 class from the DW_AT_containing_type attribute. */
3949 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3951 struct type
*t
= die_containing_type (die
, cu
);
3953 TYPE_VPTR_BASETYPE (type
) = t
;
3958 /* Our own class provides vtbl ptr. */
3959 for (i
= TYPE_NFIELDS (t
) - 1;
3960 i
>= TYPE_N_BASECLASSES (t
);
3963 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
3965 if (is_vtable_name (fieldname
, cu
))
3967 TYPE_VPTR_FIELDNO (type
) = i
;
3972 /* Complain if virtual function table field not found. */
3973 if (i
< TYPE_N_BASECLASSES (t
))
3974 complaint (&symfile_complaints
,
3975 _("virtual function table pointer not found when defining class '%s'"),
3976 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
3981 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3984 else if (cu
->producer
3985 && strncmp (cu
->producer
,
3986 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
3988 /* The IBM XLC compiler does not provide direct indication
3989 of the containing type, but the vtable pointer is
3990 always named __vfp. */
3994 for (i
= TYPE_NFIELDS (type
) - 1;
3995 i
>= TYPE_N_BASECLASSES (type
);
3998 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4000 TYPE_VPTR_FIELDNO (type
) = i
;
4001 TYPE_VPTR_BASETYPE (type
) = type
;
4008 do_cleanups (back_to
);
4011 processing_current_prefix
= previous_prefix
;
4012 if (back_to
!= NULL
)
4013 do_cleanups (back_to
);
4017 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4019 struct objfile
*objfile
= cu
->objfile
;
4020 const char *previous_prefix
= processing_current_prefix
;
4021 struct die_info
*child_die
= die
->child
;
4023 if (TYPE_TAG_NAME (die
->type
) != NULL
)
4024 processing_current_prefix
= TYPE_TAG_NAME (die
->type
);
4026 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4027 snapshots) has been known to create a die giving a declaration
4028 for a class that has, as a child, a die giving a definition for a
4029 nested class. So we have to process our children even if the
4030 current die is a declaration. Normally, of course, a declaration
4031 won't have any children at all. */
4033 while (child_die
!= NULL
&& child_die
->tag
)
4035 if (child_die
->tag
== DW_TAG_member
4036 || child_die
->tag
== DW_TAG_variable
4037 || child_die
->tag
== DW_TAG_inheritance
)
4042 process_die (child_die
, cu
);
4044 child_die
= sibling_die (child_die
);
4047 /* Do not consider external references. According to the DWARF standard,
4048 these DIEs are identified by the fact that they have no byte_size
4049 attribute, and a declaration attribute. */
4050 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4051 || !die_is_declaration (die
, cu
))
4052 new_symbol (die
, die
->type
, cu
);
4054 processing_current_prefix
= previous_prefix
;
4057 /* Given a DW_AT_enumeration_type die, set its type. We do not
4058 complete the type's fields yet, or create any symbols. */
4061 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4063 struct objfile
*objfile
= cu
->objfile
;
4065 struct attribute
*attr
;
4070 type
= alloc_type (objfile
);
4072 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4073 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4074 if (attr
&& DW_STRING (attr
))
4076 char *name
= DW_STRING (attr
);
4078 if (processing_has_namespace_info
)
4080 TYPE_TAG_NAME (type
) = typename_concat (&objfile
->objfile_obstack
,
4081 processing_current_prefix
,
4086 /* The name is already allocated along with this objfile, so
4087 we don't need to duplicate it for the type. */
4088 TYPE_TAG_NAME (type
) = name
;
4092 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4095 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4099 TYPE_LENGTH (type
) = 0;
4102 set_die_type (die
, type
, cu
);
4105 /* Determine the name of the type represented by DIE, which should be
4106 a named C++ or Java compound type. Return the name in question; the caller
4107 is responsible for xfree()'ing it. */
4110 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4112 struct cleanup
*back_to
= NULL
;
4113 struct die_info
*spec_die
= die_specification (die
, cu
);
4114 char *new_prefix
= NULL
;
4116 /* If this is the definition of a class that is declared by another
4117 die, then processing_current_prefix may not be accurate; see
4118 read_func_scope for a similar example. */
4119 if (spec_die
!= NULL
)
4121 char *specification_prefix
= determine_prefix (spec_die
, cu
);
4122 processing_current_prefix
= specification_prefix
;
4123 back_to
= make_cleanup (xfree
, specification_prefix
);
4126 /* If we don't have namespace debug info, guess the name by trying
4127 to demangle the names of members, just like we did in
4128 guess_structure_name. */
4129 if (!processing_has_namespace_info
)
4131 struct die_info
*child
;
4133 for (child
= die
->child
;
4134 child
!= NULL
&& child
->tag
!= 0;
4135 child
= sibling_die (child
))
4137 if (child
->tag
== DW_TAG_subprogram
)
4140 = language_class_name_from_physname (cu
->language_defn
,
4144 if (new_prefix
!= NULL
)
4150 if (new_prefix
== NULL
)
4152 const char *name
= dwarf2_name (die
, cu
);
4153 new_prefix
= typename_concat (NULL
, processing_current_prefix
,
4154 name
? name
: "<<anonymous>>",
4158 if (back_to
!= NULL
)
4159 do_cleanups (back_to
);
4164 /* Given a pointer to a die which begins an enumeration, process all
4165 the dies that define the members of the enumeration, and create the
4166 symbol for the enumeration type.
4168 NOTE: We reverse the order of the element list. */
4171 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4173 struct objfile
*objfile
= cu
->objfile
;
4174 struct die_info
*child_die
;
4175 struct field
*fields
;
4176 struct attribute
*attr
;
4179 int unsigned_enum
= 1;
4183 if (die
->child
!= NULL
)
4185 child_die
= die
->child
;
4186 while (child_die
&& child_die
->tag
)
4188 if (child_die
->tag
!= DW_TAG_enumerator
)
4190 process_die (child_die
, cu
);
4194 attr
= dwarf2_attr (child_die
, DW_AT_name
, cu
);
4197 sym
= new_symbol (child_die
, die
->type
, cu
);
4198 if (SYMBOL_VALUE (sym
) < 0)
4201 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4203 fields
= (struct field
*)
4205 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4206 * sizeof (struct field
));
4209 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
4210 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4211 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
4212 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4213 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
4219 child_die
= sibling_die (child_die
);
4224 TYPE_NFIELDS (die
->type
) = num_fields
;
4225 TYPE_FIELDS (die
->type
) = (struct field
*)
4226 TYPE_ALLOC (die
->type
, sizeof (struct field
) * num_fields
);
4227 memcpy (TYPE_FIELDS (die
->type
), fields
,
4228 sizeof (struct field
) * num_fields
);
4232 TYPE_FLAGS (die
->type
) |= TYPE_FLAG_UNSIGNED
;
4235 new_symbol (die
, die
->type
, cu
);
4238 /* Extract all information from a DW_TAG_array_type DIE and put it in
4239 the DIE's type field. For now, this only handles one dimensional
4243 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4245 struct objfile
*objfile
= cu
->objfile
;
4246 struct die_info
*child_die
;
4247 struct type
*type
= NULL
;
4248 struct type
*element_type
, *range_type
, *index_type
;
4249 struct type
**range_types
= NULL
;
4250 struct attribute
*attr
;
4252 struct cleanup
*back_to
;
4254 /* Return if we've already decoded this type. */
4260 element_type
= die_type (die
, cu
);
4262 /* Irix 6.2 native cc creates array types without children for
4263 arrays with unspecified length. */
4264 if (die
->child
== NULL
)
4266 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
, cu
);
4267 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4268 set_die_type (die
, create_array_type (NULL
, element_type
, range_type
),
4273 back_to
= make_cleanup (null_cleanup
, NULL
);
4274 child_die
= die
->child
;
4275 while (child_die
&& child_die
->tag
)
4277 if (child_die
->tag
== DW_TAG_subrange_type
)
4279 read_subrange_type (child_die
, cu
);
4281 if (child_die
->type
!= NULL
)
4283 /* The range type was succesfully read. Save it for
4284 the array type creation. */
4285 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4287 range_types
= (struct type
**)
4288 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4289 * sizeof (struct type
*));
4291 make_cleanup (free_current_contents
, &range_types
);
4293 range_types
[ndim
++] = child_die
->type
;
4296 child_die
= sibling_die (child_die
);
4299 /* Dwarf2 dimensions are output from left to right, create the
4300 necessary array types in backwards order. */
4302 type
= element_type
;
4304 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4308 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4313 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4316 /* Understand Dwarf2 support for vector types (like they occur on
4317 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4318 array type. This is not part of the Dwarf2/3 standard yet, but a
4319 custom vendor extension. The main difference between a regular
4320 array and the vector variant is that vectors are passed by value
4322 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4324 TYPE_FLAGS (type
) |= TYPE_FLAG_VECTOR
;
4326 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4327 if (attr
&& DW_STRING (attr
))
4328 TYPE_NAME (type
) = DW_STRING (attr
);
4330 do_cleanups (back_to
);
4332 /* Install the type in the die. */
4333 set_die_type (die
, type
, cu
);
4336 static enum dwarf_array_dim_ordering
4337 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4339 struct attribute
*attr
;
4341 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4343 if (attr
) return DW_SND (attr
);
4346 GNU F77 is a special case, as at 08/2004 array type info is the
4347 opposite order to the dwarf2 specification, but data is still
4348 laid out as per normal fortran.
4350 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4354 if (cu
->language
== language_fortran
&&
4355 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4357 return DW_ORD_row_major
;
4360 switch (cu
->language_defn
->la_array_ordering
)
4362 case array_column_major
:
4363 return DW_ORD_col_major
;
4364 case array_row_major
:
4366 return DW_ORD_row_major
;
4370 /* Extract all information from a DW_TAG_set_type DIE and put it in
4371 the DIE's type field. */
4374 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4376 if (die
->type
== NULL
)
4377 die
->type
= create_set_type ((struct type
*) NULL
, die_type (die
, cu
));
4380 /* First cut: install each common block member as a global variable. */
4383 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4385 struct die_info
*child_die
;
4386 struct attribute
*attr
;
4388 CORE_ADDR base
= (CORE_ADDR
) 0;
4390 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4393 /* Support the .debug_loc offsets */
4394 if (attr_form_is_block (attr
))
4396 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
4398 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
4400 dwarf2_complex_location_expr_complaint ();
4404 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4405 "common block member");
4408 if (die
->child
!= NULL
)
4410 child_die
= die
->child
;
4411 while (child_die
&& child_die
->tag
)
4413 sym
= new_symbol (child_die
, NULL
, cu
);
4414 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
4417 SYMBOL_VALUE_ADDRESS (sym
) =
4418 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
4419 add_symbol_to_list (sym
, &global_symbols
);
4421 child_die
= sibling_die (child_die
);
4426 /* Read a C++ namespace. */
4429 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4431 struct objfile
*objfile
= cu
->objfile
;
4432 const char *previous_prefix
= processing_current_prefix
;
4435 struct die_info
*current_die
;
4436 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4438 name
= namespace_name (die
, &is_anonymous
, cu
);
4440 /* Now build the name of the current namespace. */
4442 if (previous_prefix
[0] == '\0')
4444 processing_current_prefix
= name
;
4448 char *temp_name
= typename_concat (NULL
, previous_prefix
, name
, cu
);
4449 make_cleanup (xfree
, temp_name
);
4450 processing_current_prefix
= temp_name
;
4453 /* Add a symbol associated to this if we haven't seen the namespace
4454 before. Also, add a using directive if it's an anonymous
4457 if (dwarf2_extension (die
, cu
) == NULL
)
4461 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4462 this cast will hopefully become unnecessary. */
4463 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
4464 (char *) processing_current_prefix
,
4466 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
4468 new_symbol (die
, type
, cu
);
4469 set_die_type (die
, type
, cu
);
4472 cp_add_using_directive (processing_current_prefix
,
4473 strlen (previous_prefix
),
4474 strlen (processing_current_prefix
));
4477 if (die
->child
!= NULL
)
4479 struct die_info
*child_die
= die
->child
;
4481 while (child_die
&& child_die
->tag
)
4483 process_die (child_die
, cu
);
4484 child_die
= sibling_die (child_die
);
4488 processing_current_prefix
= previous_prefix
;
4489 do_cleanups (back_to
);
4492 /* Return the name of the namespace represented by DIE. Set
4493 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4497 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
4499 struct die_info
*current_die
;
4500 const char *name
= NULL
;
4502 /* Loop through the extensions until we find a name. */
4504 for (current_die
= die
;
4505 current_die
!= NULL
;
4506 current_die
= dwarf2_extension (die
, cu
))
4508 name
= dwarf2_name (current_die
, cu
);
4513 /* Is it an anonymous namespace? */
4515 *is_anonymous
= (name
== NULL
);
4517 name
= "(anonymous namespace)";
4522 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4523 the user defined type vector. */
4526 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4528 struct comp_unit_head
*cu_header
= &cu
->header
;
4530 struct attribute
*attr_byte_size
;
4531 struct attribute
*attr_address_class
;
4532 int byte_size
, addr_class
;
4539 type
= lookup_pointer_type (die_type (die
, cu
));
4541 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4543 byte_size
= DW_UNSND (attr_byte_size
);
4545 byte_size
= cu_header
->addr_size
;
4547 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
4548 if (attr_address_class
)
4549 addr_class
= DW_UNSND (attr_address_class
);
4551 addr_class
= DW_ADDR_none
;
4553 /* If the pointer size or address class is different than the
4554 default, create a type variant marked as such and set the
4555 length accordingly. */
4556 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
4558 if (gdbarch_address_class_type_flags_p (current_gdbarch
))
4562 type_flags
= gdbarch_address_class_type_flags
4563 (current_gdbarch
, byte_size
, addr_class
);
4564 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
4565 type
= make_type_with_address_space (type
, type_flags
);
4567 else if (TYPE_LENGTH (type
) != byte_size
)
4569 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
4572 /* Should we also complain about unhandled address classes? */
4576 TYPE_LENGTH (type
) = byte_size
;
4577 set_die_type (die
, type
, cu
);
4580 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4581 the user defined type vector. */
4584 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4586 struct objfile
*objfile
= cu
->objfile
;
4588 struct type
*to_type
;
4589 struct type
*domain
;
4596 to_type
= die_type (die
, cu
);
4597 domain
= die_containing_type (die
, cu
);
4599 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
4600 type
= lookup_methodptr_type (to_type
);
4602 type
= lookup_memberptr_type (to_type
, domain
);
4604 set_die_type (die
, type
, cu
);
4607 /* Extract all information from a DW_TAG_reference_type DIE and add to
4608 the user defined type vector. */
4611 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4613 struct comp_unit_head
*cu_header
= &cu
->header
;
4615 struct attribute
*attr
;
4622 type
= lookup_reference_type (die_type (die
, cu
));
4623 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4626 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4630 TYPE_LENGTH (type
) = cu_header
->addr_size
;
4632 set_die_type (die
, type
, cu
);
4636 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4638 struct type
*base_type
;
4645 base_type
= die_type (die
, cu
);
4646 set_die_type (die
, make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0),
4651 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4653 struct type
*base_type
;
4660 base_type
= die_type (die
, cu
);
4661 set_die_type (die
, make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0),
4665 /* Extract all information from a DW_TAG_string_type DIE and add to
4666 the user defined type vector. It isn't really a user defined type,
4667 but it behaves like one, with other DIE's using an AT_user_def_type
4668 attribute to reference it. */
4671 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4673 struct objfile
*objfile
= cu
->objfile
;
4674 struct type
*type
, *range_type
, *index_type
, *char_type
;
4675 struct attribute
*attr
;
4676 unsigned int length
;
4683 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
4686 length
= DW_UNSND (attr
);
4690 /* check for the DW_AT_byte_size attribute */
4691 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4694 length
= DW_UNSND (attr
);
4701 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
, cu
);
4702 range_type
= create_range_type (NULL
, index_type
, 1, length
);
4703 if (cu
->language
== language_fortran
)
4705 /* Need to create a unique string type for bounds
4707 type
= create_string_type (0, range_type
);
4711 char_type
= dwarf2_fundamental_type (objfile
, FT_CHAR
, cu
);
4712 type
= create_string_type (char_type
, range_type
);
4714 set_die_type (die
, type
, cu
);
4717 /* Handle DIES due to C code like:
4721 int (*funcp)(int a, long l);
4725 ('funcp' generates a DW_TAG_subroutine_type DIE)
4729 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4731 struct type
*type
; /* Type that this function returns */
4732 struct type
*ftype
; /* Function that returns above type */
4733 struct attribute
*attr
;
4735 /* Decode the type that this subroutine returns */
4740 type
= die_type (die
, cu
);
4741 ftype
= make_function_type (type
, (struct type
**) 0);
4743 /* All functions in C++ and Java have prototypes. */
4744 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
4745 if ((attr
&& (DW_UNSND (attr
) != 0))
4746 || cu
->language
== language_cplus
4747 || cu
->language
== language_java
)
4748 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
4750 if (die
->child
!= NULL
)
4752 struct die_info
*child_die
;
4756 /* Count the number of parameters.
4757 FIXME: GDB currently ignores vararg functions, but knows about
4758 vararg member functions. */
4759 child_die
= die
->child
;
4760 while (child_die
&& child_die
->tag
)
4762 if (child_die
->tag
== DW_TAG_formal_parameter
)
4764 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
4765 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
4766 child_die
= sibling_die (child_die
);
4769 /* Allocate storage for parameters and fill them in. */
4770 TYPE_NFIELDS (ftype
) = nparams
;
4771 TYPE_FIELDS (ftype
) = (struct field
*)
4772 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
4774 child_die
= die
->child
;
4775 while (child_die
&& child_die
->tag
)
4777 if (child_die
->tag
== DW_TAG_formal_parameter
)
4779 /* Dwarf2 has no clean way to discern C++ static and non-static
4780 member functions. G++ helps GDB by marking the first
4781 parameter for non-static member functions (which is the
4782 this pointer) as artificial. We pass this information
4783 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4784 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
4786 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
4788 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
4789 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
4792 child_die
= sibling_die (child_die
);
4796 set_die_type (die
, ftype
, cu
);
4800 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
4802 struct objfile
*objfile
= cu
->objfile
;
4803 struct attribute
*attr
;
4808 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4809 if (attr
&& DW_STRING (attr
))
4811 name
= DW_STRING (attr
);
4813 set_die_type (die
, init_type (TYPE_CODE_TYPEDEF
, 0,
4814 TYPE_FLAG_TARGET_STUB
, name
, objfile
),
4816 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, cu
);
4820 /* Find a representation of a given base type and install
4821 it in the TYPE field of the die. */
4824 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4826 struct objfile
*objfile
= cu
->objfile
;
4828 struct attribute
*attr
;
4829 int encoding
= 0, size
= 0;
4831 /* If we've already decoded this die, this is a no-op. */
4837 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
4840 encoding
= DW_UNSND (attr
);
4842 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4845 size
= DW_UNSND (attr
);
4847 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4848 if (attr
&& DW_STRING (attr
))
4850 enum type_code code
= TYPE_CODE_INT
;
4855 case DW_ATE_address
:
4856 /* Turn DW_ATE_address into a void * pointer. */
4857 code
= TYPE_CODE_PTR
;
4858 type_flags
|= TYPE_FLAG_UNSIGNED
;
4860 case DW_ATE_boolean
:
4861 code
= TYPE_CODE_BOOL
;
4862 type_flags
|= TYPE_FLAG_UNSIGNED
;
4864 case DW_ATE_complex_float
:
4865 code
= TYPE_CODE_COMPLEX
;
4868 code
= TYPE_CODE_FLT
;
4872 case DW_ATE_unsigned
:
4873 type_flags
|= TYPE_FLAG_UNSIGNED
;
4875 case DW_ATE_signed_char
:
4876 if (cu
->language
== language_m2
)
4877 code
= TYPE_CODE_CHAR
;
4879 case DW_ATE_unsigned_char
:
4880 if (cu
->language
== language_m2
)
4881 code
= TYPE_CODE_CHAR
;
4882 type_flags
|= TYPE_FLAG_UNSIGNED
;
4885 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
4886 dwarf_type_encoding_name (encoding
));
4889 type
= init_type (code
, size
, type_flags
, DW_STRING (attr
), objfile
);
4890 if (encoding
== DW_ATE_address
)
4891 TYPE_TARGET_TYPE (type
) = dwarf2_fundamental_type (objfile
, FT_VOID
,
4893 else if (encoding
== DW_ATE_complex_float
)
4896 TYPE_TARGET_TYPE (type
)
4897 = dwarf2_fundamental_type (objfile
, FT_EXT_PREC_FLOAT
, cu
);
4898 else if (size
== 16)
4899 TYPE_TARGET_TYPE (type
)
4900 = dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
, cu
);
4902 TYPE_TARGET_TYPE (type
)
4903 = dwarf2_fundamental_type (objfile
, FT_FLOAT
, cu
);
4908 type
= dwarf_base_type (encoding
, size
, cu
);
4910 set_die_type (die
, type
, cu
);
4913 /* Read the given DW_AT_subrange DIE. */
4916 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4918 struct type
*base_type
;
4919 struct type
*range_type
;
4920 struct attribute
*attr
;
4924 /* If we have already decoded this die, then nothing more to do. */
4928 base_type
= die_type (die
, cu
);
4929 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
4931 complaint (&symfile_complaints
,
4932 _("DW_AT_type missing from DW_TAG_subrange_type"));
4934 = dwarf_base_type (DW_ATE_signed
,
4935 gdbarch_addr_bit (current_gdbarch
) / 8, cu
);
4938 if (cu
->language
== language_fortran
)
4940 /* FORTRAN implies a lower bound of 1, if not given. */
4944 /* FIXME: For variable sized arrays either of these could be
4945 a variable rather than a constant value. We'll allow it,
4946 but we don't know how to handle it. */
4947 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
4949 low
= dwarf2_get_attr_constant_value (attr
, 0);
4951 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
4954 if (attr
->form
== DW_FORM_block1
)
4956 /* GCC encodes arrays with unspecified or dynamic length
4957 with a DW_FORM_block1 attribute.
4958 FIXME: GDB does not yet know how to handle dynamic
4959 arrays properly, treat them as arrays with unspecified
4962 FIXME: jimb/2003-09-22: GDB does not really know
4963 how to handle arrays of unspecified length
4964 either; we just represent them as zero-length
4965 arrays. Choose an appropriate upper bound given
4966 the lower bound we've computed above. */
4970 high
= dwarf2_get_attr_constant_value (attr
, 1);
4973 range_type
= create_range_type (NULL
, base_type
, low
, high
);
4975 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4976 if (attr
&& DW_STRING (attr
))
4977 TYPE_NAME (range_type
) = DW_STRING (attr
);
4979 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4981 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
4983 set_die_type (die
, range_type
, cu
);
4987 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4990 struct attribute
*attr
;
4995 /* For now, we only support the C meaning of an unspecified type: void. */
4997 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4998 type
= init_type (TYPE_CODE_VOID
, 0, 0, attr
? DW_STRING (attr
) : "",
5001 set_die_type (die
, type
, cu
);
5004 /* Read a whole compilation unit into a linked list of dies. */
5006 static struct die_info
*
5007 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5009 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5012 /* Read a single die and all its descendents. Set the die's sibling
5013 field to NULL; set other fields in the die correctly, and set all
5014 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5015 location of the info_ptr after reading all of those dies. PARENT
5016 is the parent of the die in question. */
5018 static struct die_info
*
5019 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5020 struct dwarf2_cu
*cu
,
5021 gdb_byte
**new_info_ptr
,
5022 struct die_info
*parent
)
5024 struct die_info
*die
;
5028 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5029 store_in_ref_table (die
->offset
, die
, cu
);
5033 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5039 *new_info_ptr
= cur_ptr
;
5042 die
->sibling
= NULL
;
5043 die
->parent
= parent
;
5047 /* Read a die, all of its descendents, and all of its siblings; set
5048 all of the fields of all of the dies correctly. Arguments are as
5049 in read_die_and_children. */
5051 static struct die_info
*
5052 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5053 struct dwarf2_cu
*cu
,
5054 gdb_byte
**new_info_ptr
,
5055 struct die_info
*parent
)
5057 struct die_info
*first_die
, *last_sibling
;
5061 first_die
= last_sibling
= NULL
;
5065 struct die_info
*die
5066 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5074 last_sibling
->sibling
= die
;
5079 *new_info_ptr
= cur_ptr
;
5089 /* Free a linked list of dies. */
5092 free_die_list (struct die_info
*dies
)
5094 struct die_info
*die
, *next
;
5099 if (die
->child
!= NULL
)
5100 free_die_list (die
->child
);
5101 next
= die
->sibling
;
5108 /* Read the contents of the section at OFFSET and of size SIZE from the
5109 object file specified by OBJFILE into the objfile_obstack and return it. */
5112 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5114 bfd
*abfd
= objfile
->obfd
;
5115 gdb_byte
*buf
, *retbuf
;
5116 bfd_size_type size
= bfd_get_section_size (sectp
);
5121 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5122 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5126 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5127 || bfd_bread (buf
, size
, abfd
) != size
)
5128 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5129 bfd_get_filename (abfd
));
5134 /* In DWARF version 2, the description of the debugging information is
5135 stored in a separate .debug_abbrev section. Before we read any
5136 dies from a section we read in all abbreviations and install them
5137 in a hash table. This function also sets flags in CU describing
5138 the data found in the abbrev table. */
5141 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5143 struct comp_unit_head
*cu_header
= &cu
->header
;
5144 gdb_byte
*abbrev_ptr
;
5145 struct abbrev_info
*cur_abbrev
;
5146 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5147 unsigned int abbrev_form
, hash_number
;
5148 struct attr_abbrev
*cur_attrs
;
5149 unsigned int allocated_attrs
;
5151 /* Initialize dwarf2 abbrevs */
5152 obstack_init (&cu
->abbrev_obstack
);
5153 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5155 * sizeof (struct abbrev_info
*)));
5156 memset (cu
->dwarf2_abbrevs
, 0,
5157 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5159 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5160 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5161 abbrev_ptr
+= bytes_read
;
5163 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5164 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5166 /* loop until we reach an abbrev number of 0 */
5167 while (abbrev_number
)
5169 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5171 /* read in abbrev header */
5172 cur_abbrev
->number
= abbrev_number
;
5173 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5174 abbrev_ptr
+= bytes_read
;
5175 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5178 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5179 cu
->has_namespace_info
= 1;
5181 /* now read in declarations */
5182 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5183 abbrev_ptr
+= bytes_read
;
5184 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5185 abbrev_ptr
+= bytes_read
;
5188 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5190 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5192 = xrealloc (cur_attrs
, (allocated_attrs
5193 * sizeof (struct attr_abbrev
)));
5196 /* Record whether this compilation unit might have
5197 inter-compilation-unit references. If we don't know what form
5198 this attribute will have, then it might potentially be a
5199 DW_FORM_ref_addr, so we conservatively expect inter-CU
5202 if (abbrev_form
== DW_FORM_ref_addr
5203 || abbrev_form
== DW_FORM_indirect
)
5204 cu
->has_form_ref_addr
= 1;
5206 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5207 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5208 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5209 abbrev_ptr
+= bytes_read
;
5210 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5211 abbrev_ptr
+= bytes_read
;
5214 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5215 (cur_abbrev
->num_attrs
5216 * sizeof (struct attr_abbrev
)));
5217 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5218 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5220 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5221 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5222 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5224 /* Get next abbreviation.
5225 Under Irix6 the abbreviations for a compilation unit are not
5226 always properly terminated with an abbrev number of 0.
5227 Exit loop if we encounter an abbreviation which we have
5228 already read (which means we are about to read the abbreviations
5229 for the next compile unit) or if the end of the abbreviation
5230 table is reached. */
5231 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5232 >= dwarf2_per_objfile
->abbrev_size
)
5234 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5235 abbrev_ptr
+= bytes_read
;
5236 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5243 /* Release the memory used by the abbrev table for a compilation unit. */
5246 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5248 struct dwarf2_cu
*cu
= ptr_to_cu
;
5250 obstack_free (&cu
->abbrev_obstack
, NULL
);
5251 cu
->dwarf2_abbrevs
= NULL
;
5254 /* Lookup an abbrev_info structure in the abbrev hash table. */
5256 static struct abbrev_info
*
5257 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5259 unsigned int hash_number
;
5260 struct abbrev_info
*abbrev
;
5262 hash_number
= number
% ABBREV_HASH_SIZE
;
5263 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5267 if (abbrev
->number
== number
)
5270 abbrev
= abbrev
->next
;
5275 /* Returns nonzero if TAG represents a type that we might generate a partial
5279 is_type_tag_for_partial (int tag
)
5284 /* Some types that would be reasonable to generate partial symbols for,
5285 that we don't at present. */
5286 case DW_TAG_array_type
:
5287 case DW_TAG_file_type
:
5288 case DW_TAG_ptr_to_member_type
:
5289 case DW_TAG_set_type
:
5290 case DW_TAG_string_type
:
5291 case DW_TAG_subroutine_type
:
5293 case DW_TAG_base_type
:
5294 case DW_TAG_class_type
:
5295 case DW_TAG_enumeration_type
:
5296 case DW_TAG_structure_type
:
5297 case DW_TAG_subrange_type
:
5298 case DW_TAG_typedef
:
5299 case DW_TAG_union_type
:
5306 /* Load all DIEs that are interesting for partial symbols into memory. */
5308 static struct partial_die_info
*
5309 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5310 struct dwarf2_cu
*cu
)
5312 struct partial_die_info
*part_die
;
5313 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5314 struct abbrev_info
*abbrev
;
5315 unsigned int bytes_read
;
5316 unsigned int load_all
= 0;
5318 int nesting_level
= 1;
5323 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5327 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5331 &cu
->comp_unit_obstack
,
5332 hashtab_obstack_allocate
,
5333 dummy_obstack_deallocate
);
5335 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5336 sizeof (struct partial_die_info
));
5340 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5342 /* A NULL abbrev means the end of a series of children. */
5345 if (--nesting_level
== 0)
5347 /* PART_DIE was probably the last thing allocated on the
5348 comp_unit_obstack, so we could call obstack_free
5349 here. We don't do that because the waste is small,
5350 and will be cleaned up when we're done with this
5351 compilation unit. This way, we're also more robust
5352 against other users of the comp_unit_obstack. */
5355 info_ptr
+= bytes_read
;
5356 last_die
= parent_die
;
5357 parent_die
= parent_die
->die_parent
;
5361 /* Check whether this DIE is interesting enough to save. Normally
5362 we would not be interested in members here, but there may be
5363 later variables referencing them via DW_AT_specification (for
5366 && !is_type_tag_for_partial (abbrev
->tag
)
5367 && abbrev
->tag
!= DW_TAG_enumerator
5368 && abbrev
->tag
!= DW_TAG_subprogram
5369 && abbrev
->tag
!= DW_TAG_variable
5370 && abbrev
->tag
!= DW_TAG_namespace
5371 && abbrev
->tag
!= DW_TAG_member
)
5373 /* Otherwise we skip to the next sibling, if any. */
5374 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5378 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5379 abfd
, info_ptr
, cu
);
5381 /* This two-pass algorithm for processing partial symbols has a
5382 high cost in cache pressure. Thus, handle some simple cases
5383 here which cover the majority of C partial symbols. DIEs
5384 which neither have specification tags in them, nor could have
5385 specification tags elsewhere pointing at them, can simply be
5386 processed and discarded.
5388 This segment is also optional; scan_partial_symbols and
5389 add_partial_symbol will handle these DIEs if we chain
5390 them in normally. When compilers which do not emit large
5391 quantities of duplicate debug information are more common,
5392 this code can probably be removed. */
5394 /* Any complete simple types at the top level (pretty much all
5395 of them, for a language without namespaces), can be processed
5397 if (parent_die
== NULL
5398 && part_die
->has_specification
== 0
5399 && part_die
->is_declaration
== 0
5400 && (part_die
->tag
== DW_TAG_typedef
5401 || part_die
->tag
== DW_TAG_base_type
5402 || part_die
->tag
== DW_TAG_subrange_type
))
5404 if (building_psymtab
&& part_die
->name
!= NULL
)
5405 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5406 VAR_DOMAIN
, LOC_TYPEDEF
,
5407 &cu
->objfile
->static_psymbols
,
5408 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5409 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5413 /* If we're at the second level, and we're an enumerator, and
5414 our parent has no specification (meaning possibly lives in a
5415 namespace elsewhere), then we can add the partial symbol now
5416 instead of queueing it. */
5417 if (part_die
->tag
== DW_TAG_enumerator
5418 && parent_die
!= NULL
5419 && parent_die
->die_parent
== NULL
5420 && parent_die
->tag
== DW_TAG_enumeration_type
5421 && parent_die
->has_specification
== 0)
5423 if (part_die
->name
== NULL
)
5424 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5425 else if (building_psymtab
)
5426 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5427 VAR_DOMAIN
, LOC_CONST
,
5428 (cu
->language
== language_cplus
5429 || cu
->language
== language_java
)
5430 ? &cu
->objfile
->global_psymbols
5431 : &cu
->objfile
->static_psymbols
,
5432 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5434 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5438 /* We'll save this DIE so link it in. */
5439 part_die
->die_parent
= parent_die
;
5440 part_die
->die_sibling
= NULL
;
5441 part_die
->die_child
= NULL
;
5443 if (last_die
&& last_die
== parent_die
)
5444 last_die
->die_child
= part_die
;
5446 last_die
->die_sibling
= part_die
;
5448 last_die
= part_die
;
5450 if (first_die
== NULL
)
5451 first_die
= part_die
;
5453 /* Maybe add the DIE to the hash table. Not all DIEs that we
5454 find interesting need to be in the hash table, because we
5455 also have the parent/sibling/child chains; only those that we
5456 might refer to by offset later during partial symbol reading.
5458 For now this means things that might have be the target of a
5459 DW_AT_specification, DW_AT_abstract_origin, or
5460 DW_AT_extension. DW_AT_extension will refer only to
5461 namespaces; DW_AT_abstract_origin refers to functions (and
5462 many things under the function DIE, but we do not recurse
5463 into function DIEs during partial symbol reading) and
5464 possibly variables as well; DW_AT_specification refers to
5465 declarations. Declarations ought to have the DW_AT_declaration
5466 flag. It happens that GCC forgets to put it in sometimes, but
5467 only for functions, not for types.
5469 Adding more things than necessary to the hash table is harmless
5470 except for the performance cost. Adding too few will result in
5471 wasted time in find_partial_die, when we reread the compilation
5472 unit with load_all_dies set. */
5475 || abbrev
->tag
== DW_TAG_subprogram
5476 || abbrev
->tag
== DW_TAG_variable
5477 || abbrev
->tag
== DW_TAG_namespace
5478 || part_die
->is_declaration
)
5482 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5483 part_die
->offset
, INSERT
);
5487 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5488 sizeof (struct partial_die_info
));
5490 /* For some DIEs we want to follow their children (if any). For C
5491 we have no reason to follow the children of structures; for other
5492 languages we have to, both so that we can get at method physnames
5493 to infer fully qualified class names, and for DW_AT_specification. */
5494 if (last_die
->has_children
5496 || last_die
->tag
== DW_TAG_namespace
5497 || last_die
->tag
== DW_TAG_enumeration_type
5498 || (cu
->language
!= language_c
5499 && (last_die
->tag
== DW_TAG_class_type
5500 || last_die
->tag
== DW_TAG_structure_type
5501 || last_die
->tag
== DW_TAG_union_type
))))
5504 parent_die
= last_die
;
5508 /* Otherwise we skip to the next sibling, if any. */
5509 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5511 /* Back to the top, do it again. */
5515 /* Read a minimal amount of information into the minimal die structure. */
5518 read_partial_die (struct partial_die_info
*part_die
,
5519 struct abbrev_info
*abbrev
,
5520 unsigned int abbrev_len
, bfd
*abfd
,
5521 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5523 unsigned int bytes_read
, i
;
5524 struct attribute attr
;
5525 int has_low_pc_attr
= 0;
5526 int has_high_pc_attr
= 0;
5528 memset (part_die
, 0, sizeof (struct partial_die_info
));
5530 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5532 info_ptr
+= abbrev_len
;
5537 part_die
->tag
= abbrev
->tag
;
5538 part_die
->has_children
= abbrev
->has_children
;
5540 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5542 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5544 /* Store the data if it is of an attribute we want to keep in a
5545 partial symbol table. */
5550 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5551 if (part_die
->name
== NULL
)
5552 part_die
->name
= DW_STRING (&attr
);
5554 case DW_AT_comp_dir
:
5555 if (part_die
->dirname
== NULL
)
5556 part_die
->dirname
= DW_STRING (&attr
);
5558 case DW_AT_MIPS_linkage_name
:
5559 part_die
->name
= DW_STRING (&attr
);
5562 has_low_pc_attr
= 1;
5563 part_die
->lowpc
= DW_ADDR (&attr
);
5566 has_high_pc_attr
= 1;
5567 part_die
->highpc
= DW_ADDR (&attr
);
5569 case DW_AT_location
:
5570 /* Support the .debug_loc offsets */
5571 if (attr_form_is_block (&attr
))
5573 part_die
->locdesc
= DW_BLOCK (&attr
);
5575 else if (attr
.form
== DW_FORM_data4
|| attr
.form
== DW_FORM_data8
)
5577 dwarf2_complex_location_expr_complaint ();
5581 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5582 "partial symbol information");
5585 case DW_AT_language
:
5586 part_die
->language
= DW_UNSND (&attr
);
5588 case DW_AT_external
:
5589 part_die
->is_external
= DW_UNSND (&attr
);
5591 case DW_AT_declaration
:
5592 part_die
->is_declaration
= DW_UNSND (&attr
);
5595 part_die
->has_type
= 1;
5597 case DW_AT_abstract_origin
:
5598 case DW_AT_specification
:
5599 case DW_AT_extension
:
5600 part_die
->has_specification
= 1;
5601 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5604 /* Ignore absolute siblings, they might point outside of
5605 the current compile unit. */
5606 if (attr
.form
== DW_FORM_ref_addr
)
5607 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5609 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5610 + dwarf2_get_ref_die_offset (&attr
, cu
);
5612 case DW_AT_stmt_list
:
5613 part_die
->has_stmt_list
= 1;
5614 part_die
->line_offset
= DW_UNSND (&attr
);
5616 case DW_AT_byte_size
:
5617 part_die
->has_byte_size
= 1;
5624 /* When using the GNU linker, .gnu.linkonce. sections are used to
5625 eliminate duplicate copies of functions and vtables and such.
5626 The linker will arbitrarily choose one and discard the others.
5627 The AT_*_pc values for such functions refer to local labels in
5628 these sections. If the section from that file was discarded, the
5629 labels are not in the output, so the relocs get a value of 0.
5630 If this is a discarded function, mark the pc bounds as invalid,
5631 so that GDB will ignore it. */
5632 if (has_low_pc_attr
&& has_high_pc_attr
5633 && part_die
->lowpc
< part_die
->highpc
5634 && (part_die
->lowpc
!= 0
5635 || dwarf2_per_objfile
->has_section_at_zero
))
5636 part_die
->has_pc_info
= 1;
5640 /* Find a cached partial DIE at OFFSET in CU. */
5642 static struct partial_die_info
*
5643 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5645 struct partial_die_info
*lookup_die
= NULL
;
5646 struct partial_die_info part_die
;
5648 part_die
.offset
= offset
;
5649 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5654 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5656 static struct partial_die_info
*
5657 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5659 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5660 struct partial_die_info
*pd
= NULL
;
5662 if (offset
>= cu
->header
.offset
5663 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5665 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5670 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5672 if (per_cu
->cu
== NULL
)
5674 load_comp_unit (per_cu
, cu
->objfile
);
5675 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5676 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5679 per_cu
->cu
->last_used
= 0;
5680 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5682 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5684 struct cleanup
*back_to
;
5685 struct partial_die_info comp_unit_die
;
5686 struct abbrev_info
*abbrev
;
5687 unsigned int bytes_read
;
5690 per_cu
->load_all_dies
= 1;
5692 /* Re-read the DIEs. */
5693 back_to
= make_cleanup (null_cleanup
, 0);
5694 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
5696 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
5697 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
5699 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
5700 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
5701 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
5702 per_cu
->cu
->objfile
->obfd
, info_ptr
,
5704 if (comp_unit_die
.has_children
)
5705 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
5706 do_cleanups (back_to
);
5708 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5712 internal_error (__FILE__
, __LINE__
,
5713 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5714 offset
, bfd_get_filename (cu
->objfile
->obfd
));
5718 /* Adjust PART_DIE before generating a symbol for it. This function
5719 may set the is_external flag or change the DIE's name. */
5722 fixup_partial_die (struct partial_die_info
*part_die
,
5723 struct dwarf2_cu
*cu
)
5725 /* If we found a reference attribute and the DIE has no name, try
5726 to find a name in the referred to DIE. */
5728 if (part_die
->name
== NULL
&& part_die
->has_specification
)
5730 struct partial_die_info
*spec_die
;
5732 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
5734 fixup_partial_die (spec_die
, cu
);
5738 part_die
->name
= spec_die
->name
;
5740 /* Copy DW_AT_external attribute if it is set. */
5741 if (spec_die
->is_external
)
5742 part_die
->is_external
= spec_die
->is_external
;
5746 /* Set default names for some unnamed DIEs. */
5747 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
5748 || part_die
->tag
== DW_TAG_class_type
))
5749 part_die
->name
= "(anonymous class)";
5751 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
5752 part_die
->name
= "(anonymous namespace)";
5754 if (part_die
->tag
== DW_TAG_structure_type
5755 || part_die
->tag
== DW_TAG_class_type
5756 || part_die
->tag
== DW_TAG_union_type
)
5757 guess_structure_name (part_die
, cu
);
5760 /* Read the die from the .debug_info section buffer. Set DIEP to
5761 point to a newly allocated die with its information, except for its
5762 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5763 whether the die has children or not. */
5766 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
5767 struct dwarf2_cu
*cu
, int *has_children
)
5769 unsigned int abbrev_number
, bytes_read
, i
, offset
;
5770 struct abbrev_info
*abbrev
;
5771 struct die_info
*die
;
5773 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5774 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5775 info_ptr
+= bytes_read
;
5778 die
= dwarf_alloc_die ();
5780 die
->abbrev
= abbrev_number
;
5787 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
5790 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5792 bfd_get_filename (abfd
));
5794 die
= dwarf_alloc_die ();
5795 die
->offset
= offset
;
5796 die
->tag
= abbrev
->tag
;
5797 die
->abbrev
= abbrev_number
;
5800 die
->num_attrs
= abbrev
->num_attrs
;
5801 die
->attrs
= (struct attribute
*)
5802 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
5804 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5806 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
5807 abfd
, info_ptr
, cu
);
5809 /* If this attribute is an absolute reference to a different
5810 compilation unit, make sure that compilation unit is loaded
5812 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
5813 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
5814 || (DW_ADDR (&die
->attrs
[i
])
5815 >= cu
->header
.offset
+ cu
->header
.length
)))
5817 struct dwarf2_per_cu_data
*per_cu
;
5818 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
5821 /* Mark the dependence relation so that we don't flush PER_CU
5823 dwarf2_add_dependence (cu
, per_cu
);
5825 /* If it's already on the queue, we have nothing to do. */
5829 /* If the compilation unit is already loaded, just mark it as
5831 if (per_cu
->cu
!= NULL
)
5833 per_cu
->cu
->last_used
= 0;
5837 /* Add it to the queue. */
5838 queue_comp_unit (per_cu
);
5843 *has_children
= abbrev
->has_children
;
5847 /* Read an attribute value described by an attribute form. */
5850 read_attribute_value (struct attribute
*attr
, unsigned form
,
5851 bfd
*abfd
, gdb_byte
*info_ptr
,
5852 struct dwarf2_cu
*cu
)
5854 struct comp_unit_head
*cu_header
= &cu
->header
;
5855 unsigned int bytes_read
;
5856 struct dwarf_block
*blk
;
5862 case DW_FORM_ref_addr
:
5863 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
5864 info_ptr
+= bytes_read
;
5866 case DW_FORM_block2
:
5867 blk
= dwarf_alloc_block (cu
);
5868 blk
->size
= read_2_bytes (abfd
, info_ptr
);
5870 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5871 info_ptr
+= blk
->size
;
5872 DW_BLOCK (attr
) = blk
;
5874 case DW_FORM_block4
:
5875 blk
= dwarf_alloc_block (cu
);
5876 blk
->size
= read_4_bytes (abfd
, info_ptr
);
5878 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5879 info_ptr
+= blk
->size
;
5880 DW_BLOCK (attr
) = blk
;
5883 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
5887 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
5891 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
5894 case DW_FORM_string
:
5895 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
5896 info_ptr
+= bytes_read
;
5899 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
5901 info_ptr
+= bytes_read
;
5904 blk
= dwarf_alloc_block (cu
);
5905 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5906 info_ptr
+= bytes_read
;
5907 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5908 info_ptr
+= blk
->size
;
5909 DW_BLOCK (attr
) = blk
;
5911 case DW_FORM_block1
:
5912 blk
= dwarf_alloc_block (cu
);
5913 blk
->size
= read_1_byte (abfd
, info_ptr
);
5915 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5916 info_ptr
+= blk
->size
;
5917 DW_BLOCK (attr
) = blk
;
5920 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
5924 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
5928 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
5929 info_ptr
+= bytes_read
;
5932 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5933 info_ptr
+= bytes_read
;
5936 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
5940 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
5944 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
5948 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
5951 case DW_FORM_ref_udata
:
5952 DW_ADDR (attr
) = (cu
->header
.offset
5953 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
5954 info_ptr
+= bytes_read
;
5956 case DW_FORM_indirect
:
5957 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5958 info_ptr
+= bytes_read
;
5959 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
5962 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
5963 dwarf_form_name (form
),
5964 bfd_get_filename (abfd
));
5969 /* Read an attribute described by an abbreviated attribute. */
5972 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
5973 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5975 attr
->name
= abbrev
->name
;
5976 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
5979 /* read dwarf information from a buffer */
5982 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
5984 return bfd_get_8 (abfd
, buf
);
5988 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
5990 return bfd_get_signed_8 (abfd
, buf
);
5994 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
5996 return bfd_get_16 (abfd
, buf
);
6000 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6002 return bfd_get_signed_16 (abfd
, buf
);
6006 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6008 return bfd_get_32 (abfd
, buf
);
6012 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6014 return bfd_get_signed_32 (abfd
, buf
);
6017 static unsigned long
6018 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6020 return bfd_get_64 (abfd
, buf
);
6024 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6025 unsigned int *bytes_read
)
6027 struct comp_unit_head
*cu_header
= &cu
->header
;
6028 CORE_ADDR retval
= 0;
6030 if (cu_header
->signed_addr_p
)
6032 switch (cu_header
->addr_size
)
6035 retval
= bfd_get_signed_16 (abfd
, buf
);
6038 retval
= bfd_get_signed_32 (abfd
, buf
);
6041 retval
= bfd_get_signed_64 (abfd
, buf
);
6044 internal_error (__FILE__
, __LINE__
,
6045 _("read_address: bad switch, signed [in module %s]"),
6046 bfd_get_filename (abfd
));
6051 switch (cu_header
->addr_size
)
6054 retval
= bfd_get_16 (abfd
, buf
);
6057 retval
= bfd_get_32 (abfd
, buf
);
6060 retval
= bfd_get_64 (abfd
, buf
);
6063 internal_error (__FILE__
, __LINE__
,
6064 _("read_address: bad switch, unsigned [in module %s]"),
6065 bfd_get_filename (abfd
));
6069 *bytes_read
= cu_header
->addr_size
;
6073 /* Read the initial length from a section. The (draft) DWARF 3
6074 specification allows the initial length to take up either 4 bytes
6075 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6076 bytes describe the length and all offsets will be 8 bytes in length
6079 An older, non-standard 64-bit format is also handled by this
6080 function. The older format in question stores the initial length
6081 as an 8-byte quantity without an escape value. Lengths greater
6082 than 2^32 aren't very common which means that the initial 4 bytes
6083 is almost always zero. Since a length value of zero doesn't make
6084 sense for the 32-bit format, this initial zero can be considered to
6085 be an escape value which indicates the presence of the older 64-bit
6086 format. As written, the code can't detect (old format) lengths
6087 greater than 4GB. If it becomes necessary to handle lengths
6088 somewhat larger than 4GB, we could allow other small values (such
6089 as the non-sensical values of 1, 2, and 3) to also be used as
6090 escape values indicating the presence of the old format.
6092 The value returned via bytes_read should be used to increment the
6093 relevant pointer after calling read_initial_length().
6095 As a side effect, this function sets the fields initial_length_size
6096 and offset_size in cu_header to the values appropriate for the
6097 length field. (The format of the initial length field determines
6098 the width of file offsets to be fetched later with read_offset().)
6100 [ Note: read_initial_length() and read_offset() are based on the
6101 document entitled "DWARF Debugging Information Format", revision
6102 3, draft 8, dated November 19, 2001. This document was obtained
6105 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6107 This document is only a draft and is subject to change. (So beware.)
6109 Details regarding the older, non-standard 64-bit format were
6110 determined empirically by examining 64-bit ELF files produced by
6111 the SGI toolchain on an IRIX 6.5 machine.
6113 - Kevin, July 16, 2002
6117 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6118 unsigned int *bytes_read
)
6120 LONGEST length
= bfd_get_32 (abfd
, buf
);
6122 if (length
== 0xffffffff)
6124 length
= bfd_get_64 (abfd
, buf
+ 4);
6127 else if (length
== 0)
6129 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6130 length
= bfd_get_64 (abfd
, buf
);
6140 gdb_assert (cu_header
->initial_length_size
== 0
6141 || cu_header
->initial_length_size
== 4
6142 || cu_header
->initial_length_size
== 8
6143 || cu_header
->initial_length_size
== 12);
6145 if (cu_header
->initial_length_size
!= 0
6146 && cu_header
->initial_length_size
!= *bytes_read
)
6147 complaint (&symfile_complaints
,
6148 _("intermixed 32-bit and 64-bit DWARF sections"));
6150 cu_header
->initial_length_size
= *bytes_read
;
6151 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6157 /* Read an offset from the data stream. The size of the offset is
6158 given by cu_header->offset_size. */
6161 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6162 unsigned int *bytes_read
)
6166 switch (cu_header
->offset_size
)
6169 retval
= bfd_get_32 (abfd
, buf
);
6173 retval
= bfd_get_64 (abfd
, buf
);
6177 internal_error (__FILE__
, __LINE__
,
6178 _("read_offset: bad switch [in module %s]"),
6179 bfd_get_filename (abfd
));
6186 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6188 /* If the size of a host char is 8 bits, we can return a pointer
6189 to the buffer, otherwise we have to copy the data to a buffer
6190 allocated on the temporary obstack. */
6191 gdb_assert (HOST_CHAR_BIT
== 8);
6196 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6198 /* If the size of a host char is 8 bits, we can return a pointer
6199 to the string, otherwise we have to copy the string to a buffer
6200 allocated on the temporary obstack. */
6201 gdb_assert (HOST_CHAR_BIT
== 8);
6204 *bytes_read_ptr
= 1;
6207 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6208 return (char *) buf
;
6212 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6213 const struct comp_unit_head
*cu_header
,
6214 unsigned int *bytes_read_ptr
)
6216 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6219 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6221 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6222 bfd_get_filename (abfd
));
6225 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6227 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6228 bfd_get_filename (abfd
));
6231 gdb_assert (HOST_CHAR_BIT
== 8);
6232 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6234 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6237 static unsigned long
6238 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6240 unsigned long result
;
6241 unsigned int num_read
;
6251 byte
= bfd_get_8 (abfd
, buf
);
6254 result
|= ((unsigned long)(byte
& 127) << shift
);
6255 if ((byte
& 128) == 0)
6261 *bytes_read_ptr
= num_read
;
6266 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6269 int i
, shift
, num_read
;
6278 byte
= bfd_get_8 (abfd
, buf
);
6281 result
|= ((long)(byte
& 127) << shift
);
6283 if ((byte
& 128) == 0)
6288 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6289 result
|= -(((long)1) << shift
);
6290 *bytes_read_ptr
= num_read
;
6294 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6297 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6303 byte
= bfd_get_8 (abfd
, buf
);
6305 if ((byte
& 128) == 0)
6311 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6317 cu
->language
= language_c
;
6319 case DW_LANG_C_plus_plus
:
6320 cu
->language
= language_cplus
;
6322 case DW_LANG_Fortran77
:
6323 case DW_LANG_Fortran90
:
6324 case DW_LANG_Fortran95
:
6325 cu
->language
= language_fortran
;
6327 case DW_LANG_Mips_Assembler
:
6328 cu
->language
= language_asm
;
6331 cu
->language
= language_java
;
6335 cu
->language
= language_ada
;
6337 case DW_LANG_Modula2
:
6338 cu
->language
= language_m2
;
6340 case DW_LANG_Pascal83
:
6341 cu
->language
= language_pascal
;
6343 case DW_LANG_Cobol74
:
6344 case DW_LANG_Cobol85
:
6346 cu
->language
= language_minimal
;
6349 cu
->language_defn
= language_def (cu
->language
);
6352 /* Return the named attribute or NULL if not there. */
6354 static struct attribute
*
6355 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6358 struct attribute
*spec
= NULL
;
6360 for (i
= 0; i
< die
->num_attrs
; ++i
)
6362 if (die
->attrs
[i
].name
== name
)
6363 return &die
->attrs
[i
];
6364 if (die
->attrs
[i
].name
== DW_AT_specification
6365 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6366 spec
= &die
->attrs
[i
];
6370 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6375 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6376 and holds a non-zero value. This function should only be used for
6377 DW_FORM_flag attributes. */
6380 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6382 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6384 return (attr
&& DW_UNSND (attr
));
6388 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6390 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6391 which value is non-zero. However, we have to be careful with
6392 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6393 (via dwarf2_flag_true_p) follows this attribute. So we may
6394 end up accidently finding a declaration attribute that belongs
6395 to a different DIE referenced by the specification attribute,
6396 even though the given DIE does not have a declaration attribute. */
6397 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6398 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6401 /* Return the die giving the specification for DIE, if there is
6404 static struct die_info
*
6405 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6407 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6409 if (spec_attr
== NULL
)
6412 return follow_die_ref (die
, spec_attr
, cu
);
6415 /* Free the line_header structure *LH, and any arrays and strings it
6418 free_line_header (struct line_header
*lh
)
6420 if (lh
->standard_opcode_lengths
)
6421 xfree (lh
->standard_opcode_lengths
);
6423 /* Remember that all the lh->file_names[i].name pointers are
6424 pointers into debug_line_buffer, and don't need to be freed. */
6426 xfree (lh
->file_names
);
6428 /* Similarly for the include directory names. */
6429 if (lh
->include_dirs
)
6430 xfree (lh
->include_dirs
);
6436 /* Add an entry to LH's include directory table. */
6438 add_include_dir (struct line_header
*lh
, char *include_dir
)
6440 /* Grow the array if necessary. */
6441 if (lh
->include_dirs_size
== 0)
6443 lh
->include_dirs_size
= 1; /* for testing */
6444 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6445 * sizeof (*lh
->include_dirs
));
6447 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6449 lh
->include_dirs_size
*= 2;
6450 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6451 (lh
->include_dirs_size
6452 * sizeof (*lh
->include_dirs
)));
6455 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6459 /* Add an entry to LH's file name table. */
6461 add_file_name (struct line_header
*lh
,
6463 unsigned int dir_index
,
6464 unsigned int mod_time
,
6465 unsigned int length
)
6467 struct file_entry
*fe
;
6469 /* Grow the array if necessary. */
6470 if (lh
->file_names_size
== 0)
6472 lh
->file_names_size
= 1; /* for testing */
6473 lh
->file_names
= xmalloc (lh
->file_names_size
6474 * sizeof (*lh
->file_names
));
6476 else if (lh
->num_file_names
>= lh
->file_names_size
)
6478 lh
->file_names_size
*= 2;
6479 lh
->file_names
= xrealloc (lh
->file_names
,
6480 (lh
->file_names_size
6481 * sizeof (*lh
->file_names
)));
6484 fe
= &lh
->file_names
[lh
->num_file_names
++];
6486 fe
->dir_index
= dir_index
;
6487 fe
->mod_time
= mod_time
;
6488 fe
->length
= length
;
6494 /* Read the statement program header starting at OFFSET in
6495 .debug_line, according to the endianness of ABFD. Return a pointer
6496 to a struct line_header, allocated using xmalloc.
6498 NOTE: the strings in the include directory and file name tables of
6499 the returned object point into debug_line_buffer, and must not be
6501 static struct line_header
*
6502 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6503 struct dwarf2_cu
*cu
)
6505 struct cleanup
*back_to
;
6506 struct line_header
*lh
;
6508 unsigned int bytes_read
;
6510 char *cur_dir
, *cur_file
;
6512 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6514 complaint (&symfile_complaints
, _("missing .debug_line section"));
6518 /* Make sure that at least there's room for the total_length field.
6519 That could be 12 bytes long, but we're just going to fudge that. */
6520 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6522 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6526 lh
= xmalloc (sizeof (*lh
));
6527 memset (lh
, 0, sizeof (*lh
));
6528 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6531 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6533 /* Read in the header. */
6535 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6536 line_ptr
+= bytes_read
;
6537 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6538 + dwarf2_per_objfile
->line_size
))
6540 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6543 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6544 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6546 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6547 line_ptr
+= bytes_read
;
6548 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6550 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6552 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6554 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6556 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6558 lh
->standard_opcode_lengths
6559 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6561 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6562 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6564 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6568 /* Read directory table. */
6569 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6571 line_ptr
+= bytes_read
;
6572 add_include_dir (lh
, cur_dir
);
6574 line_ptr
+= bytes_read
;
6576 /* Read file name table. */
6577 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6579 unsigned int dir_index
, mod_time
, length
;
6581 line_ptr
+= bytes_read
;
6582 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6583 line_ptr
+= bytes_read
;
6584 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6585 line_ptr
+= bytes_read
;
6586 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6587 line_ptr
+= bytes_read
;
6589 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6591 line_ptr
+= bytes_read
;
6592 lh
->statement_program_start
= line_ptr
;
6594 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6595 + dwarf2_per_objfile
->line_size
))
6596 complaint (&symfile_complaints
,
6597 _("line number info header doesn't fit in `.debug_line' section"));
6599 discard_cleanups (back_to
);
6603 /* This function exists to work around a bug in certain compilers
6604 (particularly GCC 2.95), in which the first line number marker of a
6605 function does not show up until after the prologue, right before
6606 the second line number marker. This function shifts ADDRESS down
6607 to the beginning of the function if necessary, and is called on
6608 addresses passed to record_line. */
6611 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6613 struct function_range
*fn
;
6615 /* Find the function_range containing address. */
6620 cu
->cached_fn
= cu
->first_fn
;
6624 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6630 while (fn
&& fn
!= cu
->cached_fn
)
6631 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6641 if (address
!= fn
->lowpc
)
6642 complaint (&symfile_complaints
,
6643 _("misplaced first line number at 0x%lx for '%s'"),
6644 (unsigned long) address
, fn
->name
);
6649 /* Decode the Line Number Program (LNP) for the given line_header
6650 structure and CU. The actual information extracted and the type
6651 of structures created from the LNP depends on the value of PST.
6653 1. If PST is NULL, then this procedure uses the data from the program
6654 to create all necessary symbol tables, and their linetables.
6655 The compilation directory of the file is passed in COMP_DIR,
6656 and must not be NULL.
6658 2. If PST is not NULL, this procedure reads the program to determine
6659 the list of files included by the unit represented by PST, and
6660 builds all the associated partial symbol tables. In this case,
6661 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6662 is not used to compute the full name of the symtab, and therefore
6663 omitting it when building the partial symtab does not introduce
6664 the potential for inconsistency - a partial symtab and its associated
6665 symbtab having a different fullname -). */
6668 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6669 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6671 gdb_byte
*line_ptr
, *extended_end
;
6673 unsigned int bytes_read
, extended_len
;
6674 unsigned char op_code
, extended_op
, adj_opcode
;
6676 struct objfile
*objfile
= cu
->objfile
;
6677 const int decode_for_pst_p
= (pst
!= NULL
);
6678 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6680 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6682 line_ptr
= lh
->statement_program_start
;
6683 line_end
= lh
->statement_program_end
;
6685 /* Read the statement sequences until there's nothing left. */
6686 while (line_ptr
< line_end
)
6688 /* state machine registers */
6689 CORE_ADDR address
= 0;
6690 unsigned int file
= 1;
6691 unsigned int line
= 1;
6692 unsigned int column
= 0;
6693 int is_stmt
= lh
->default_is_stmt
;
6694 int basic_block
= 0;
6695 int end_sequence
= 0;
6697 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
6699 /* Start a subfile for the current file of the state machine. */
6700 /* lh->include_dirs and lh->file_names are 0-based, but the
6701 directory and file name numbers in the statement program
6703 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
6707 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6709 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6712 /* Decode the table. */
6713 while (!end_sequence
)
6715 op_code
= read_1_byte (abfd
, line_ptr
);
6718 if (op_code
>= lh
->opcode_base
)
6720 /* Special operand. */
6721 adj_opcode
= op_code
- lh
->opcode_base
;
6722 address
+= (adj_opcode
/ lh
->line_range
)
6723 * lh
->minimum_instruction_length
;
6724 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
6725 if (lh
->num_file_names
< file
)
6726 dwarf2_debug_line_missing_file_complaint ();
6729 lh
->file_names
[file
- 1].included_p
= 1;
6730 if (!decode_for_pst_p
)
6732 if (last_subfile
!= current_subfile
)
6735 record_line (last_subfile
, 0, address
);
6736 last_subfile
= current_subfile
;
6738 /* Append row to matrix using current values. */
6739 record_line (current_subfile
, line
,
6740 check_cu_functions (address
, cu
));
6745 else switch (op_code
)
6747 case DW_LNS_extended_op
:
6748 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6749 line_ptr
+= bytes_read
;
6750 extended_end
= line_ptr
+ extended_len
;
6751 extended_op
= read_1_byte (abfd
, line_ptr
);
6753 switch (extended_op
)
6755 case DW_LNE_end_sequence
:
6758 if (lh
->num_file_names
< file
)
6759 dwarf2_debug_line_missing_file_complaint ();
6762 lh
->file_names
[file
- 1].included_p
= 1;
6763 if (!decode_for_pst_p
)
6764 record_line (current_subfile
, 0, address
);
6767 case DW_LNE_set_address
:
6768 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
6769 line_ptr
+= bytes_read
;
6770 address
+= baseaddr
;
6772 case DW_LNE_define_file
:
6775 unsigned int dir_index
, mod_time
, length
;
6777 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
6778 line_ptr
+= bytes_read
;
6780 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6781 line_ptr
+= bytes_read
;
6783 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6784 line_ptr
+= bytes_read
;
6786 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6787 line_ptr
+= bytes_read
;
6788 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6792 complaint (&symfile_complaints
,
6793 _("mangled .debug_line section"));
6796 /* Make sure that we parsed the extended op correctly. If e.g.
6797 we expected a different address size than the producer used,
6798 we may have read the wrong number of bytes. */
6799 if (line_ptr
!= extended_end
)
6801 complaint (&symfile_complaints
,
6802 _("mangled .debug_line section"));
6807 if (lh
->num_file_names
< file
)
6808 dwarf2_debug_line_missing_file_complaint ();
6811 lh
->file_names
[file
- 1].included_p
= 1;
6812 if (!decode_for_pst_p
)
6814 if (last_subfile
!= current_subfile
)
6817 record_line (last_subfile
, 0, address
);
6818 last_subfile
= current_subfile
;
6820 record_line (current_subfile
, line
,
6821 check_cu_functions (address
, cu
));
6826 case DW_LNS_advance_pc
:
6827 address
+= lh
->minimum_instruction_length
6828 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6829 line_ptr
+= bytes_read
;
6831 case DW_LNS_advance_line
:
6832 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
6833 line_ptr
+= bytes_read
;
6835 case DW_LNS_set_file
:
6837 /* The arrays lh->include_dirs and lh->file_names are
6838 0-based, but the directory and file name numbers in
6839 the statement program are 1-based. */
6840 struct file_entry
*fe
;
6843 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6844 line_ptr
+= bytes_read
;
6845 if (lh
->num_file_names
< file
)
6846 dwarf2_debug_line_missing_file_complaint ();
6849 fe
= &lh
->file_names
[file
- 1];
6851 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6852 if (!decode_for_pst_p
)
6854 last_subfile
= current_subfile
;
6855 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6860 case DW_LNS_set_column
:
6861 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6862 line_ptr
+= bytes_read
;
6864 case DW_LNS_negate_stmt
:
6865 is_stmt
= (!is_stmt
);
6867 case DW_LNS_set_basic_block
:
6870 /* Add to the address register of the state machine the
6871 address increment value corresponding to special opcode
6872 255. I.e., this value is scaled by the minimum
6873 instruction length since special opcode 255 would have
6874 scaled the the increment. */
6875 case DW_LNS_const_add_pc
:
6876 address
+= (lh
->minimum_instruction_length
6877 * ((255 - lh
->opcode_base
) / lh
->line_range
));
6879 case DW_LNS_fixed_advance_pc
:
6880 address
+= read_2_bytes (abfd
, line_ptr
);
6885 /* Unknown standard opcode, ignore it. */
6888 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
6890 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6891 line_ptr
+= bytes_read
;
6898 if (decode_for_pst_p
)
6902 /* Now that we're done scanning the Line Header Program, we can
6903 create the psymtab of each included file. */
6904 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
6905 if (lh
->file_names
[file_index
].included_p
== 1)
6907 const struct file_entry fe
= lh
->file_names
[file_index
];
6908 char *include_name
= fe
.name
;
6909 char *dir_name
= NULL
;
6910 char *pst_filename
= pst
->filename
;
6913 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
6915 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
6917 include_name
= concat (dir_name
, SLASH_STRING
,
6918 include_name
, (char *)NULL
);
6919 make_cleanup (xfree
, include_name
);
6922 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
6924 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
6925 pst_filename
, (char *)NULL
);
6926 make_cleanup (xfree
, pst_filename
);
6929 if (strcmp (include_name
, pst_filename
) != 0)
6930 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
6935 /* Make sure a symtab is created for every file, even files
6936 which contain only variables (i.e. no code with associated
6940 struct file_entry
*fe
;
6942 for (i
= 0; i
< lh
->num_file_names
; i
++)
6945 fe
= &lh
->file_names
[i
];
6947 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6948 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6950 /* Skip the main file; we don't need it, and it must be
6951 allocated last, so that it will show up before the
6952 non-primary symtabs in the objfile's symtab list. */
6953 if (current_subfile
== first_subfile
)
6956 if (current_subfile
->symtab
== NULL
)
6957 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
6959 fe
->symtab
= current_subfile
->symtab
;
6964 /* Start a subfile for DWARF. FILENAME is the name of the file and
6965 DIRNAME the name of the source directory which contains FILENAME
6966 or NULL if not known. COMP_DIR is the compilation directory for the
6967 linetable's compilation unit or NULL if not known.
6968 This routine tries to keep line numbers from identical absolute and
6969 relative file names in a common subfile.
6971 Using the `list' example from the GDB testsuite, which resides in
6972 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
6973 of /srcdir/list0.c yields the following debugging information for list0.c:
6975 DW_AT_name: /srcdir/list0.c
6976 DW_AT_comp_dir: /compdir
6977 files.files[0].name: list0.h
6978 files.files[0].dir: /srcdir
6979 files.files[1].name: list0.c
6980 files.files[1].dir: /srcdir
6982 The line number information for list0.c has to end up in a single
6983 subfile, so that `break /srcdir/list0.c:1' works as expected.
6984 start_subfile will ensure that this happens provided that we pass the
6985 concatenation of files.files[1].dir and files.files[1].name as the
6989 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
6993 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
6994 `start_symtab' will always pass the contents of DW_AT_comp_dir as
6995 second argument to start_subfile. To be consistent, we do the
6996 same here. In order not to lose the line information directory,
6997 we concatenate it to the filename when it makes sense.
6998 Note that the Dwarf3 standard says (speaking of filenames in line
6999 information): ``The directory index is ignored for file names
7000 that represent full path names''. Thus ignoring dirname in the
7001 `else' branch below isn't an issue. */
7003 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7004 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7006 fullname
= filename
;
7008 start_subfile (fullname
, comp_dir
);
7010 if (fullname
!= filename
)
7015 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7016 struct dwarf2_cu
*cu
)
7018 struct objfile
*objfile
= cu
->objfile
;
7019 struct comp_unit_head
*cu_header
= &cu
->header
;
7021 /* NOTE drow/2003-01-30: There used to be a comment and some special
7022 code here to turn a symbol with DW_AT_external and a
7023 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7024 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7025 with some versions of binutils) where shared libraries could have
7026 relocations against symbols in their debug information - the
7027 minimal symbol would have the right address, but the debug info
7028 would not. It's no longer necessary, because we will explicitly
7029 apply relocations when we read in the debug information now. */
7031 /* A DW_AT_location attribute with no contents indicates that a
7032 variable has been optimized away. */
7033 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7035 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7039 /* Handle one degenerate form of location expression specially, to
7040 preserve GDB's previous behavior when section offsets are
7041 specified. If this is just a DW_OP_addr then mark this symbol
7044 if (attr_form_is_block (attr
)
7045 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7046 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7050 SYMBOL_VALUE_ADDRESS (sym
) =
7051 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7052 fixup_symbol_section (sym
, objfile
);
7053 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7054 SYMBOL_SECTION (sym
));
7055 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7059 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7060 expression evaluator, and use LOC_COMPUTED only when necessary
7061 (i.e. when the value of a register or memory location is
7062 referenced, or a thread-local block, etc.). Then again, it might
7063 not be worthwhile. I'm assuming that it isn't unless performance
7064 or memory numbers show me otherwise. */
7066 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7067 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7070 /* Given a pointer to a DWARF information entry, figure out if we need
7071 to make a symbol table entry for it, and if so, create a new entry
7072 and return a pointer to it.
7073 If TYPE is NULL, determine symbol type from the die, otherwise
7074 used the passed type. */
7076 static struct symbol
*
7077 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7079 struct objfile
*objfile
= cu
->objfile
;
7080 struct symbol
*sym
= NULL
;
7082 struct attribute
*attr
= NULL
;
7083 struct attribute
*attr2
= NULL
;
7086 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7088 if (die
->tag
!= DW_TAG_namespace
)
7089 name
= dwarf2_linkage_name (die
, cu
);
7091 name
= TYPE_NAME (type
);
7095 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7096 sizeof (struct symbol
));
7097 OBJSTAT (objfile
, n_syms
++);
7098 memset (sym
, 0, sizeof (struct symbol
));
7100 /* Cache this symbol's name and the name's demangled form (if any). */
7101 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7102 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7104 /* Default assumptions.
7105 Use the passed type or decode it from the die. */
7106 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7107 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7109 SYMBOL_TYPE (sym
) = type
;
7111 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7112 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7115 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7118 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7121 int file_index
= DW_UNSND (attr
);
7122 if (cu
->line_header
== NULL
7123 || file_index
> cu
->line_header
->num_file_names
)
7124 complaint (&symfile_complaints
,
7125 _("file index out of range"));
7126 else if (file_index
> 0)
7128 struct file_entry
*fe
;
7129 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7130 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7137 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7140 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7142 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7144 case DW_TAG_subprogram
:
7145 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7147 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7148 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7149 if (attr2
&& (DW_UNSND (attr2
) != 0))
7151 add_symbol_to_list (sym
, &global_symbols
);
7155 add_symbol_to_list (sym
, cu
->list_in_scope
);
7158 case DW_TAG_variable
:
7159 /* Compilation with minimal debug info may result in variables
7160 with missing type entries. Change the misleading `void' type
7161 to something sensible. */
7162 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7164 = builtin_type (current_gdbarch
)->nodebug_data_symbol
;
7166 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7169 dwarf2_const_value (attr
, sym
, cu
);
7170 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7171 if (attr2
&& (DW_UNSND (attr2
) != 0))
7172 add_symbol_to_list (sym
, &global_symbols
);
7174 add_symbol_to_list (sym
, cu
->list_in_scope
);
7177 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7180 var_decode_location (attr
, sym
, cu
);
7181 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7182 if (attr2
&& (DW_UNSND (attr2
) != 0))
7183 add_symbol_to_list (sym
, &global_symbols
);
7185 add_symbol_to_list (sym
, cu
->list_in_scope
);
7189 /* We do not know the address of this symbol.
7190 If it is an external symbol and we have type information
7191 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7192 The address of the variable will then be determined from
7193 the minimal symbol table whenever the variable is
7195 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7196 if (attr2
&& (DW_UNSND (attr2
) != 0)
7197 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7199 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7200 add_symbol_to_list (sym
, &global_symbols
);
7204 case DW_TAG_formal_parameter
:
7205 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7208 var_decode_location (attr
, sym
, cu
);
7209 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7210 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
7211 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
7213 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7216 dwarf2_const_value (attr
, sym
, cu
);
7218 add_symbol_to_list (sym
, cu
->list_in_scope
);
7220 case DW_TAG_unspecified_parameters
:
7221 /* From varargs functions; gdb doesn't seem to have any
7222 interest in this information, so just ignore it for now.
7225 case DW_TAG_class_type
:
7226 case DW_TAG_structure_type
:
7227 case DW_TAG_union_type
:
7228 case DW_TAG_set_type
:
7229 case DW_TAG_enumeration_type
:
7230 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7231 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7233 /* Make sure that the symbol includes appropriate enclosing
7234 classes/namespaces in its name. These are calculated in
7235 read_structure_type, and the correct name is saved in
7238 if (cu
->language
== language_cplus
7239 || cu
->language
== language_java
)
7241 struct type
*type
= SYMBOL_TYPE (sym
);
7243 if (TYPE_TAG_NAME (type
) != NULL
)
7245 /* FIXME: carlton/2003-11-10: Should this use
7246 SYMBOL_SET_NAMES instead? (The same problem also
7247 arises further down in this function.) */
7248 /* The type's name is already allocated along with
7249 this objfile, so we don't need to duplicate it
7251 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7256 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7257 really ever be static objects: otherwise, if you try
7258 to, say, break of a class's method and you're in a file
7259 which doesn't mention that class, it won't work unless
7260 the check for all static symbols in lookup_symbol_aux
7261 saves you. See the OtherFileClass tests in
7262 gdb.c++/namespace.exp. */
7264 struct pending
**list_to_add
;
7266 list_to_add
= (cu
->list_in_scope
== &file_symbols
7267 && (cu
->language
== language_cplus
7268 || cu
->language
== language_java
)
7269 ? &global_symbols
: cu
->list_in_scope
);
7271 add_symbol_to_list (sym
, list_to_add
);
7273 /* The semantics of C++ state that "struct foo { ... }" also
7274 defines a typedef for "foo". A Java class declaration also
7275 defines a typedef for the class. Synthesize a typedef symbol
7276 so that "ptype foo" works as expected. */
7277 if (cu
->language
== language_cplus
7278 || cu
->language
== language_java
7279 || cu
->language
== language_ada
)
7281 struct symbol
*typedef_sym
= (struct symbol
*)
7282 obstack_alloc (&objfile
->objfile_obstack
,
7283 sizeof (struct symbol
));
7284 *typedef_sym
= *sym
;
7285 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
7286 /* The symbol's name is already allocated along with
7287 this objfile, so we don't need to duplicate it for
7289 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7290 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7291 add_symbol_to_list (typedef_sym
, list_to_add
);
7295 case DW_TAG_typedef
:
7296 if (processing_has_namespace_info
7297 && processing_current_prefix
[0] != '\0')
7299 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7300 processing_current_prefix
,
7303 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7304 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7305 add_symbol_to_list (sym
, cu
->list_in_scope
);
7307 case DW_TAG_base_type
:
7308 case DW_TAG_subrange_type
:
7309 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7310 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7311 add_symbol_to_list (sym
, cu
->list_in_scope
);
7313 case DW_TAG_enumerator
:
7314 if (processing_has_namespace_info
7315 && processing_current_prefix
[0] != '\0')
7317 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7318 processing_current_prefix
,
7321 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7324 dwarf2_const_value (attr
, sym
, cu
);
7327 /* NOTE: carlton/2003-11-10: See comment above in the
7328 DW_TAG_class_type, etc. block. */
7330 struct pending
**list_to_add
;
7332 list_to_add
= (cu
->list_in_scope
== &file_symbols
7333 && (cu
->language
== language_cplus
7334 || cu
->language
== language_java
)
7335 ? &global_symbols
: cu
->list_in_scope
);
7337 add_symbol_to_list (sym
, list_to_add
);
7340 case DW_TAG_namespace
:
7341 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7342 add_symbol_to_list (sym
, &global_symbols
);
7345 /* Not a tag we recognize. Hopefully we aren't processing
7346 trash data, but since we must specifically ignore things
7347 we don't recognize, there is nothing else we should do at
7349 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7350 dwarf_tag_name (die
->tag
));
7357 /* Copy constant value from an attribute to a symbol. */
7360 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7361 struct dwarf2_cu
*cu
)
7363 struct objfile
*objfile
= cu
->objfile
;
7364 struct comp_unit_head
*cu_header
= &cu
->header
;
7365 struct dwarf_block
*blk
;
7370 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7371 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7372 cu_header
->addr_size
,
7373 TYPE_LENGTH (SYMBOL_TYPE
7375 SYMBOL_VALUE_BYTES (sym
) =
7376 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7377 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7378 it's body - store_unsigned_integer. */
7379 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7381 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7383 case DW_FORM_block1
:
7384 case DW_FORM_block2
:
7385 case DW_FORM_block4
:
7387 blk
= DW_BLOCK (attr
);
7388 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7389 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7391 TYPE_LENGTH (SYMBOL_TYPE
7393 SYMBOL_VALUE_BYTES (sym
) =
7394 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7395 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7396 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7399 /* The DW_AT_const_value attributes are supposed to carry the
7400 symbol's value "represented as it would be on the target
7401 architecture." By the time we get here, it's already been
7402 converted to host endianness, so we just need to sign- or
7403 zero-extend it as appropriate. */
7405 dwarf2_const_value_data (attr
, sym
, 8);
7408 dwarf2_const_value_data (attr
, sym
, 16);
7411 dwarf2_const_value_data (attr
, sym
, 32);
7414 dwarf2_const_value_data (attr
, sym
, 64);
7418 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7419 SYMBOL_CLASS (sym
) = LOC_CONST
;
7423 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7424 SYMBOL_CLASS (sym
) = LOC_CONST
;
7428 complaint (&symfile_complaints
,
7429 _("unsupported const value attribute form: '%s'"),
7430 dwarf_form_name (attr
->form
));
7431 SYMBOL_VALUE (sym
) = 0;
7432 SYMBOL_CLASS (sym
) = LOC_CONST
;
7438 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7439 or zero-extend it as appropriate for the symbol's type. */
7441 dwarf2_const_value_data (struct attribute
*attr
,
7445 LONGEST l
= DW_UNSND (attr
);
7447 if (bits
< sizeof (l
) * 8)
7449 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7450 l
&= ((LONGEST
) 1 << bits
) - 1;
7452 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7455 SYMBOL_VALUE (sym
) = l
;
7456 SYMBOL_CLASS (sym
) = LOC_CONST
;
7460 /* Return the type of the die in question using its DW_AT_type attribute. */
7462 static struct type
*
7463 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7466 struct attribute
*type_attr
;
7467 struct die_info
*type_die
;
7469 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7472 /* A missing DW_AT_type represents a void type. */
7473 return dwarf2_fundamental_type (cu
->objfile
, FT_VOID
, cu
);
7476 type_die
= follow_die_ref (die
, type_attr
, cu
);
7478 type
= tag_type_to_type (type_die
, cu
);
7481 dump_die (type_die
);
7482 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7488 /* Return the containing type of the die in question using its
7489 DW_AT_containing_type attribute. */
7491 static struct type
*
7492 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7494 struct type
*type
= NULL
;
7495 struct attribute
*type_attr
;
7496 struct die_info
*type_die
= NULL
;
7498 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7501 type_die
= follow_die_ref (die
, type_attr
, cu
);
7502 type
= tag_type_to_type (type_die
, cu
);
7507 dump_die (type_die
);
7508 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7514 static struct type
*
7515 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7523 read_type_die (die
, cu
);
7527 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7535 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7537 char *prefix
= determine_prefix (die
, cu
);
7538 const char *old_prefix
= processing_current_prefix
;
7539 struct cleanup
*back_to
= make_cleanup (xfree
, prefix
);
7540 processing_current_prefix
= prefix
;
7544 case DW_TAG_class_type
:
7545 case DW_TAG_structure_type
:
7546 case DW_TAG_union_type
:
7547 read_structure_type (die
, cu
);
7549 case DW_TAG_enumeration_type
:
7550 read_enumeration_type (die
, cu
);
7552 case DW_TAG_subprogram
:
7553 case DW_TAG_subroutine_type
:
7554 read_subroutine_type (die
, cu
);
7556 case DW_TAG_array_type
:
7557 read_array_type (die
, cu
);
7559 case DW_TAG_set_type
:
7560 read_set_type (die
, cu
);
7562 case DW_TAG_pointer_type
:
7563 read_tag_pointer_type (die
, cu
);
7565 case DW_TAG_ptr_to_member_type
:
7566 read_tag_ptr_to_member_type (die
, cu
);
7568 case DW_TAG_reference_type
:
7569 read_tag_reference_type (die
, cu
);
7571 case DW_TAG_const_type
:
7572 read_tag_const_type (die
, cu
);
7574 case DW_TAG_volatile_type
:
7575 read_tag_volatile_type (die
, cu
);
7577 case DW_TAG_string_type
:
7578 read_tag_string_type (die
, cu
);
7580 case DW_TAG_typedef
:
7581 read_typedef (die
, cu
);
7583 case DW_TAG_subrange_type
:
7584 read_subrange_type (die
, cu
);
7586 case DW_TAG_base_type
:
7587 read_base_type (die
, cu
);
7589 case DW_TAG_unspecified_type
:
7590 read_unspecified_type (die
, cu
);
7593 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7594 dwarf_tag_name (die
->tag
));
7598 processing_current_prefix
= old_prefix
;
7599 do_cleanups (back_to
);
7602 /* Return the name of the namespace/class that DIE is defined within,
7603 or "" if we can't tell. The caller should xfree the result. */
7605 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7606 therein) for an example of how to use this function to deal with
7607 DW_AT_specification. */
7610 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7612 struct die_info
*parent
;
7614 if (cu
->language
!= language_cplus
7615 && cu
->language
!= language_java
)
7618 parent
= die
->parent
;
7622 return xstrdup ("");
7626 switch (parent
->tag
) {
7627 case DW_TAG_namespace
:
7629 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7630 before doing this check? */
7631 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7633 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7638 char *parent_prefix
= determine_prefix (parent
, cu
);
7639 char *retval
= typename_concat (NULL
, parent_prefix
,
7640 namespace_name (parent
, &dummy
,
7643 xfree (parent_prefix
);
7648 case DW_TAG_class_type
:
7649 case DW_TAG_structure_type
:
7651 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7653 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7657 const char *old_prefix
= processing_current_prefix
;
7658 char *new_prefix
= determine_prefix (parent
, cu
);
7661 processing_current_prefix
= new_prefix
;
7662 retval
= determine_class_name (parent
, cu
);
7663 processing_current_prefix
= old_prefix
;
7670 return determine_prefix (parent
, cu
);
7675 /* Return a newly-allocated string formed by concatenating PREFIX and
7676 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7677 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7678 perform an obconcat, otherwise allocate storage for the result. The CU argument
7679 is used to determine the language and hence, the appropriate separator. */
7681 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7684 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
7685 struct dwarf2_cu
*cu
)
7689 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
7691 else if (cu
->language
== language_java
)
7698 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
7703 strcpy (retval
, prefix
);
7704 strcat (retval
, sep
);
7707 strcat (retval
, suffix
);
7713 /* We have an obstack. */
7714 return obconcat (obs
, prefix
, sep
, suffix
);
7718 static struct type
*
7719 dwarf_base_type (int encoding
, int size
, struct dwarf2_cu
*cu
)
7721 struct objfile
*objfile
= cu
->objfile
;
7723 /* FIXME - this should not produce a new (struct type *)
7724 every time. It should cache base types. */
7728 case DW_ATE_address
:
7729 type
= dwarf2_fundamental_type (objfile
, FT_VOID
, cu
);
7731 case DW_ATE_boolean
:
7732 type
= dwarf2_fundamental_type (objfile
, FT_BOOLEAN
, cu
);
7734 case DW_ATE_complex_float
:
7737 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_COMPLEX
, cu
);
7741 type
= dwarf2_fundamental_type (objfile
, FT_COMPLEX
, cu
);
7747 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
, cu
);
7751 type
= dwarf2_fundamental_type (objfile
, FT_FLOAT
, cu
);
7758 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
, cu
);
7761 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_SHORT
, cu
);
7765 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
, cu
);
7769 case DW_ATE_signed_char
:
7770 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
, cu
);
7772 case DW_ATE_unsigned
:
7776 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
, cu
);
7779 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_SHORT
, cu
);
7783 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_INTEGER
, cu
);
7787 case DW_ATE_unsigned_char
:
7788 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
, cu
);
7791 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
, cu
);
7798 copy_die (struct die_info
*old_die
)
7800 struct die_info
*new_die
;
7803 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
7804 memset (new_die
, 0, sizeof (struct die_info
));
7806 new_die
->tag
= old_die
->tag
;
7807 new_die
->has_children
= old_die
->has_children
;
7808 new_die
->abbrev
= old_die
->abbrev
;
7809 new_die
->offset
= old_die
->offset
;
7810 new_die
->type
= NULL
;
7812 num_attrs
= old_die
->num_attrs
;
7813 new_die
->num_attrs
= num_attrs
;
7814 new_die
->attrs
= (struct attribute
*)
7815 xmalloc (num_attrs
* sizeof (struct attribute
));
7817 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
7819 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
7820 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
7821 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
7824 new_die
->next
= NULL
;
7829 /* Return sibling of die, NULL if no sibling. */
7831 static struct die_info
*
7832 sibling_die (struct die_info
*die
)
7834 return die
->sibling
;
7837 /* Get linkage name of a die, return NULL if not found. */
7840 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7842 struct attribute
*attr
;
7844 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7845 if (attr
&& DW_STRING (attr
))
7846 return DW_STRING (attr
);
7847 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7848 if (attr
&& DW_STRING (attr
))
7849 return DW_STRING (attr
);
7853 /* Get name of a die, return NULL if not found. */
7856 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7858 struct attribute
*attr
;
7860 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7861 if (attr
&& DW_STRING (attr
))
7862 return DW_STRING (attr
);
7866 /* Return the die that this die in an extension of, or NULL if there
7869 static struct die_info
*
7870 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
7872 struct attribute
*attr
;
7874 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
7878 return follow_die_ref (die
, attr
, cu
);
7881 /* Convert a DIE tag into its string name. */
7884 dwarf_tag_name (unsigned tag
)
7888 case DW_TAG_padding
:
7889 return "DW_TAG_padding";
7890 case DW_TAG_array_type
:
7891 return "DW_TAG_array_type";
7892 case DW_TAG_class_type
:
7893 return "DW_TAG_class_type";
7894 case DW_TAG_entry_point
:
7895 return "DW_TAG_entry_point";
7896 case DW_TAG_enumeration_type
:
7897 return "DW_TAG_enumeration_type";
7898 case DW_TAG_formal_parameter
:
7899 return "DW_TAG_formal_parameter";
7900 case DW_TAG_imported_declaration
:
7901 return "DW_TAG_imported_declaration";
7903 return "DW_TAG_label";
7904 case DW_TAG_lexical_block
:
7905 return "DW_TAG_lexical_block";
7907 return "DW_TAG_member";
7908 case DW_TAG_pointer_type
:
7909 return "DW_TAG_pointer_type";
7910 case DW_TAG_reference_type
:
7911 return "DW_TAG_reference_type";
7912 case DW_TAG_compile_unit
:
7913 return "DW_TAG_compile_unit";
7914 case DW_TAG_string_type
:
7915 return "DW_TAG_string_type";
7916 case DW_TAG_structure_type
:
7917 return "DW_TAG_structure_type";
7918 case DW_TAG_subroutine_type
:
7919 return "DW_TAG_subroutine_type";
7920 case DW_TAG_typedef
:
7921 return "DW_TAG_typedef";
7922 case DW_TAG_union_type
:
7923 return "DW_TAG_union_type";
7924 case DW_TAG_unspecified_parameters
:
7925 return "DW_TAG_unspecified_parameters";
7926 case DW_TAG_variant
:
7927 return "DW_TAG_variant";
7928 case DW_TAG_common_block
:
7929 return "DW_TAG_common_block";
7930 case DW_TAG_common_inclusion
:
7931 return "DW_TAG_common_inclusion";
7932 case DW_TAG_inheritance
:
7933 return "DW_TAG_inheritance";
7934 case DW_TAG_inlined_subroutine
:
7935 return "DW_TAG_inlined_subroutine";
7937 return "DW_TAG_module";
7938 case DW_TAG_ptr_to_member_type
:
7939 return "DW_TAG_ptr_to_member_type";
7940 case DW_TAG_set_type
:
7941 return "DW_TAG_set_type";
7942 case DW_TAG_subrange_type
:
7943 return "DW_TAG_subrange_type";
7944 case DW_TAG_with_stmt
:
7945 return "DW_TAG_with_stmt";
7946 case DW_TAG_access_declaration
:
7947 return "DW_TAG_access_declaration";
7948 case DW_TAG_base_type
:
7949 return "DW_TAG_base_type";
7950 case DW_TAG_catch_block
:
7951 return "DW_TAG_catch_block";
7952 case DW_TAG_const_type
:
7953 return "DW_TAG_const_type";
7954 case DW_TAG_constant
:
7955 return "DW_TAG_constant";
7956 case DW_TAG_enumerator
:
7957 return "DW_TAG_enumerator";
7958 case DW_TAG_file_type
:
7959 return "DW_TAG_file_type";
7961 return "DW_TAG_friend";
7962 case DW_TAG_namelist
:
7963 return "DW_TAG_namelist";
7964 case DW_TAG_namelist_item
:
7965 return "DW_TAG_namelist_item";
7966 case DW_TAG_packed_type
:
7967 return "DW_TAG_packed_type";
7968 case DW_TAG_subprogram
:
7969 return "DW_TAG_subprogram";
7970 case DW_TAG_template_type_param
:
7971 return "DW_TAG_template_type_param";
7972 case DW_TAG_template_value_param
:
7973 return "DW_TAG_template_value_param";
7974 case DW_TAG_thrown_type
:
7975 return "DW_TAG_thrown_type";
7976 case DW_TAG_try_block
:
7977 return "DW_TAG_try_block";
7978 case DW_TAG_variant_part
:
7979 return "DW_TAG_variant_part";
7980 case DW_TAG_variable
:
7981 return "DW_TAG_variable";
7982 case DW_TAG_volatile_type
:
7983 return "DW_TAG_volatile_type";
7984 case DW_TAG_dwarf_procedure
:
7985 return "DW_TAG_dwarf_procedure";
7986 case DW_TAG_restrict_type
:
7987 return "DW_TAG_restrict_type";
7988 case DW_TAG_interface_type
:
7989 return "DW_TAG_interface_type";
7990 case DW_TAG_namespace
:
7991 return "DW_TAG_namespace";
7992 case DW_TAG_imported_module
:
7993 return "DW_TAG_imported_module";
7994 case DW_TAG_unspecified_type
:
7995 return "DW_TAG_unspecified_type";
7996 case DW_TAG_partial_unit
:
7997 return "DW_TAG_partial_unit";
7998 case DW_TAG_imported_unit
:
7999 return "DW_TAG_imported_unit";
8000 case DW_TAG_condition
:
8001 return "DW_TAG_condition";
8002 case DW_TAG_shared_type
:
8003 return "DW_TAG_shared_type";
8004 case DW_TAG_MIPS_loop
:
8005 return "DW_TAG_MIPS_loop";
8006 case DW_TAG_HP_array_descriptor
:
8007 return "DW_TAG_HP_array_descriptor";
8008 case DW_TAG_format_label
:
8009 return "DW_TAG_format_label";
8010 case DW_TAG_function_template
:
8011 return "DW_TAG_function_template";
8012 case DW_TAG_class_template
:
8013 return "DW_TAG_class_template";
8014 case DW_TAG_GNU_BINCL
:
8015 return "DW_TAG_GNU_BINCL";
8016 case DW_TAG_GNU_EINCL
:
8017 return "DW_TAG_GNU_EINCL";
8018 case DW_TAG_upc_shared_type
:
8019 return "DW_TAG_upc_shared_type";
8020 case DW_TAG_upc_strict_type
:
8021 return "DW_TAG_upc_strict_type";
8022 case DW_TAG_upc_relaxed_type
:
8023 return "DW_TAG_upc_relaxed_type";
8024 case DW_TAG_PGI_kanji_type
:
8025 return "DW_TAG_PGI_kanji_type";
8026 case DW_TAG_PGI_interface_block
:
8027 return "DW_TAG_PGI_interface_block";
8029 return "DW_TAG_<unknown>";
8033 /* Convert a DWARF attribute code into its string name. */
8036 dwarf_attr_name (unsigned attr
)
8041 return "DW_AT_sibling";
8042 case DW_AT_location
:
8043 return "DW_AT_location";
8045 return "DW_AT_name";
8046 case DW_AT_ordering
:
8047 return "DW_AT_ordering";
8048 case DW_AT_subscr_data
:
8049 return "DW_AT_subscr_data";
8050 case DW_AT_byte_size
:
8051 return "DW_AT_byte_size";
8052 case DW_AT_bit_offset
:
8053 return "DW_AT_bit_offset";
8054 case DW_AT_bit_size
:
8055 return "DW_AT_bit_size";
8056 case DW_AT_element_list
:
8057 return "DW_AT_element_list";
8058 case DW_AT_stmt_list
:
8059 return "DW_AT_stmt_list";
8061 return "DW_AT_low_pc";
8063 return "DW_AT_high_pc";
8064 case DW_AT_language
:
8065 return "DW_AT_language";
8067 return "DW_AT_member";
8069 return "DW_AT_discr";
8070 case DW_AT_discr_value
:
8071 return "DW_AT_discr_value";
8072 case DW_AT_visibility
:
8073 return "DW_AT_visibility";
8075 return "DW_AT_import";
8076 case DW_AT_string_length
:
8077 return "DW_AT_string_length";
8078 case DW_AT_common_reference
:
8079 return "DW_AT_common_reference";
8080 case DW_AT_comp_dir
:
8081 return "DW_AT_comp_dir";
8082 case DW_AT_const_value
:
8083 return "DW_AT_const_value";
8084 case DW_AT_containing_type
:
8085 return "DW_AT_containing_type";
8086 case DW_AT_default_value
:
8087 return "DW_AT_default_value";
8089 return "DW_AT_inline";
8090 case DW_AT_is_optional
:
8091 return "DW_AT_is_optional";
8092 case DW_AT_lower_bound
:
8093 return "DW_AT_lower_bound";
8094 case DW_AT_producer
:
8095 return "DW_AT_producer";
8096 case DW_AT_prototyped
:
8097 return "DW_AT_prototyped";
8098 case DW_AT_return_addr
:
8099 return "DW_AT_return_addr";
8100 case DW_AT_start_scope
:
8101 return "DW_AT_start_scope";
8102 case DW_AT_stride_size
:
8103 return "DW_AT_stride_size";
8104 case DW_AT_upper_bound
:
8105 return "DW_AT_upper_bound";
8106 case DW_AT_abstract_origin
:
8107 return "DW_AT_abstract_origin";
8108 case DW_AT_accessibility
:
8109 return "DW_AT_accessibility";
8110 case DW_AT_address_class
:
8111 return "DW_AT_address_class";
8112 case DW_AT_artificial
:
8113 return "DW_AT_artificial";
8114 case DW_AT_base_types
:
8115 return "DW_AT_base_types";
8116 case DW_AT_calling_convention
:
8117 return "DW_AT_calling_convention";
8119 return "DW_AT_count";
8120 case DW_AT_data_member_location
:
8121 return "DW_AT_data_member_location";
8122 case DW_AT_decl_column
:
8123 return "DW_AT_decl_column";
8124 case DW_AT_decl_file
:
8125 return "DW_AT_decl_file";
8126 case DW_AT_decl_line
:
8127 return "DW_AT_decl_line";
8128 case DW_AT_declaration
:
8129 return "DW_AT_declaration";
8130 case DW_AT_discr_list
:
8131 return "DW_AT_discr_list";
8132 case DW_AT_encoding
:
8133 return "DW_AT_encoding";
8134 case DW_AT_external
:
8135 return "DW_AT_external";
8136 case DW_AT_frame_base
:
8137 return "DW_AT_frame_base";
8139 return "DW_AT_friend";
8140 case DW_AT_identifier_case
:
8141 return "DW_AT_identifier_case";
8142 case DW_AT_macro_info
:
8143 return "DW_AT_macro_info";
8144 case DW_AT_namelist_items
:
8145 return "DW_AT_namelist_items";
8146 case DW_AT_priority
:
8147 return "DW_AT_priority";
8149 return "DW_AT_segment";
8150 case DW_AT_specification
:
8151 return "DW_AT_specification";
8152 case DW_AT_static_link
:
8153 return "DW_AT_static_link";
8155 return "DW_AT_type";
8156 case DW_AT_use_location
:
8157 return "DW_AT_use_location";
8158 case DW_AT_variable_parameter
:
8159 return "DW_AT_variable_parameter";
8160 case DW_AT_virtuality
:
8161 return "DW_AT_virtuality";
8162 case DW_AT_vtable_elem_location
:
8163 return "DW_AT_vtable_elem_location";
8164 /* DWARF 3 values. */
8165 case DW_AT_allocated
:
8166 return "DW_AT_allocated";
8167 case DW_AT_associated
:
8168 return "DW_AT_associated";
8169 case DW_AT_data_location
:
8170 return "DW_AT_data_location";
8172 return "DW_AT_stride";
8173 case DW_AT_entry_pc
:
8174 return "DW_AT_entry_pc";
8175 case DW_AT_use_UTF8
:
8176 return "DW_AT_use_UTF8";
8177 case DW_AT_extension
:
8178 return "DW_AT_extension";
8180 return "DW_AT_ranges";
8181 case DW_AT_trampoline
:
8182 return "DW_AT_trampoline";
8183 case DW_AT_call_column
:
8184 return "DW_AT_call_column";
8185 case DW_AT_call_file
:
8186 return "DW_AT_call_file";
8187 case DW_AT_call_line
:
8188 return "DW_AT_call_line";
8189 case DW_AT_description
:
8190 return "DW_AT_description";
8191 case DW_AT_binary_scale
:
8192 return "DW_AT_binary_scale";
8193 case DW_AT_decimal_scale
:
8194 return "DW_AT_decimal_scale";
8196 return "DW_AT_small";
8197 case DW_AT_decimal_sign
:
8198 return "DW_AT_decimal_sign";
8199 case DW_AT_digit_count
:
8200 return "DW_AT_digit_count";
8201 case DW_AT_picture_string
:
8202 return "DW_AT_picture_string";
8204 return "DW_AT_mutable";
8205 case DW_AT_threads_scaled
:
8206 return "DW_AT_threads_scaled";
8207 case DW_AT_explicit
:
8208 return "DW_AT_explicit";
8209 case DW_AT_object_pointer
:
8210 return "DW_AT_object_pointer";
8211 case DW_AT_endianity
:
8212 return "DW_AT_endianity";
8213 case DW_AT_elemental
:
8214 return "DW_AT_elemental";
8216 return "DW_AT_pure";
8217 case DW_AT_recursive
:
8218 return "DW_AT_recursive";
8220 /* SGI/MIPS extensions. */
8221 case DW_AT_MIPS_fde
:
8222 return "DW_AT_MIPS_fde";
8223 case DW_AT_MIPS_loop_begin
:
8224 return "DW_AT_MIPS_loop_begin";
8225 case DW_AT_MIPS_tail_loop_begin
:
8226 return "DW_AT_MIPS_tail_loop_begin";
8227 case DW_AT_MIPS_epilog_begin
:
8228 return "DW_AT_MIPS_epilog_begin";
8229 case DW_AT_MIPS_loop_unroll_factor
:
8230 return "DW_AT_MIPS_loop_unroll_factor";
8231 case DW_AT_MIPS_software_pipeline_depth
:
8232 return "DW_AT_MIPS_software_pipeline_depth";
8233 case DW_AT_MIPS_linkage_name
:
8234 return "DW_AT_MIPS_linkage_name";
8235 case DW_AT_MIPS_stride
:
8236 return "DW_AT_MIPS_stride";
8237 case DW_AT_MIPS_abstract_name
:
8238 return "DW_AT_MIPS_abstract_name";
8239 case DW_AT_MIPS_clone_origin
:
8240 return "DW_AT_MIPS_clone_origin";
8241 case DW_AT_MIPS_has_inlines
:
8242 return "DW_AT_MIPS_has_inlines";
8244 /* HP extensions. */
8245 case DW_AT_HP_block_index
:
8246 return "DW_AT_HP_block_index";
8247 case DW_AT_HP_unmodifiable
:
8248 return "DW_AT_HP_unmodifiable";
8249 case DW_AT_HP_actuals_stmt_list
:
8250 return "DW_AT_HP_actuals_stmt_list";
8251 case DW_AT_HP_proc_per_section
:
8252 return "DW_AT_HP_proc_per_section";
8253 case DW_AT_HP_raw_data_ptr
:
8254 return "DW_AT_HP_raw_data_ptr";
8255 case DW_AT_HP_pass_by_reference
:
8256 return "DW_AT_HP_pass_by_reference";
8257 case DW_AT_HP_opt_level
:
8258 return "DW_AT_HP_opt_level";
8259 case DW_AT_HP_prof_version_id
:
8260 return "DW_AT_HP_prof_version_id";
8261 case DW_AT_HP_opt_flags
:
8262 return "DW_AT_HP_opt_flags";
8263 case DW_AT_HP_cold_region_low_pc
:
8264 return "DW_AT_HP_cold_region_low_pc";
8265 case DW_AT_HP_cold_region_high_pc
:
8266 return "DW_AT_HP_cold_region_high_pc";
8267 case DW_AT_HP_all_variables_modifiable
:
8268 return "DW_AT_HP_all_variables_modifiable";
8269 case DW_AT_HP_linkage_name
:
8270 return "DW_AT_HP_linkage_name";
8271 case DW_AT_HP_prof_flags
:
8272 return "DW_AT_HP_prof_flags";
8273 /* GNU extensions. */
8274 case DW_AT_sf_names
:
8275 return "DW_AT_sf_names";
8276 case DW_AT_src_info
:
8277 return "DW_AT_src_info";
8278 case DW_AT_mac_info
:
8279 return "DW_AT_mac_info";
8280 case DW_AT_src_coords
:
8281 return "DW_AT_src_coords";
8282 case DW_AT_body_begin
:
8283 return "DW_AT_body_begin";
8284 case DW_AT_body_end
:
8285 return "DW_AT_body_end";
8286 case DW_AT_GNU_vector
:
8287 return "DW_AT_GNU_vector";
8288 /* VMS extensions. */
8289 case DW_AT_VMS_rtnbeg_pd_address
:
8290 return "DW_AT_VMS_rtnbeg_pd_address";
8291 /* UPC extension. */
8292 case DW_AT_upc_threads_scaled
:
8293 return "DW_AT_upc_threads_scaled";
8294 /* PGI (STMicroelectronics) extensions. */
8295 case DW_AT_PGI_lbase
:
8296 return "DW_AT_PGI_lbase";
8297 case DW_AT_PGI_soffset
:
8298 return "DW_AT_PGI_soffset";
8299 case DW_AT_PGI_lstride
:
8300 return "DW_AT_PGI_lstride";
8302 return "DW_AT_<unknown>";
8306 /* Convert a DWARF value form code into its string name. */
8309 dwarf_form_name (unsigned form
)
8314 return "DW_FORM_addr";
8315 case DW_FORM_block2
:
8316 return "DW_FORM_block2";
8317 case DW_FORM_block4
:
8318 return "DW_FORM_block4";
8320 return "DW_FORM_data2";
8322 return "DW_FORM_data4";
8324 return "DW_FORM_data8";
8325 case DW_FORM_string
:
8326 return "DW_FORM_string";
8328 return "DW_FORM_block";
8329 case DW_FORM_block1
:
8330 return "DW_FORM_block1";
8332 return "DW_FORM_data1";
8334 return "DW_FORM_flag";
8336 return "DW_FORM_sdata";
8338 return "DW_FORM_strp";
8340 return "DW_FORM_udata";
8341 case DW_FORM_ref_addr
:
8342 return "DW_FORM_ref_addr";
8344 return "DW_FORM_ref1";
8346 return "DW_FORM_ref2";
8348 return "DW_FORM_ref4";
8350 return "DW_FORM_ref8";
8351 case DW_FORM_ref_udata
:
8352 return "DW_FORM_ref_udata";
8353 case DW_FORM_indirect
:
8354 return "DW_FORM_indirect";
8356 return "DW_FORM_<unknown>";
8360 /* Convert a DWARF stack opcode into its string name. */
8363 dwarf_stack_op_name (unsigned op
)
8368 return "DW_OP_addr";
8370 return "DW_OP_deref";
8372 return "DW_OP_const1u";
8374 return "DW_OP_const1s";
8376 return "DW_OP_const2u";
8378 return "DW_OP_const2s";
8380 return "DW_OP_const4u";
8382 return "DW_OP_const4s";
8384 return "DW_OP_const8u";
8386 return "DW_OP_const8s";
8388 return "DW_OP_constu";
8390 return "DW_OP_consts";
8394 return "DW_OP_drop";
8396 return "DW_OP_over";
8398 return "DW_OP_pick";
8400 return "DW_OP_swap";
8404 return "DW_OP_xderef";
8412 return "DW_OP_minus";
8424 return "DW_OP_plus";
8425 case DW_OP_plus_uconst
:
8426 return "DW_OP_plus_uconst";
8432 return "DW_OP_shra";
8450 return "DW_OP_skip";
8452 return "DW_OP_lit0";
8454 return "DW_OP_lit1";
8456 return "DW_OP_lit2";
8458 return "DW_OP_lit3";
8460 return "DW_OP_lit4";
8462 return "DW_OP_lit5";
8464 return "DW_OP_lit6";
8466 return "DW_OP_lit7";
8468 return "DW_OP_lit8";
8470 return "DW_OP_lit9";
8472 return "DW_OP_lit10";
8474 return "DW_OP_lit11";
8476 return "DW_OP_lit12";
8478 return "DW_OP_lit13";
8480 return "DW_OP_lit14";
8482 return "DW_OP_lit15";
8484 return "DW_OP_lit16";
8486 return "DW_OP_lit17";
8488 return "DW_OP_lit18";
8490 return "DW_OP_lit19";
8492 return "DW_OP_lit20";
8494 return "DW_OP_lit21";
8496 return "DW_OP_lit22";
8498 return "DW_OP_lit23";
8500 return "DW_OP_lit24";
8502 return "DW_OP_lit25";
8504 return "DW_OP_lit26";
8506 return "DW_OP_lit27";
8508 return "DW_OP_lit28";
8510 return "DW_OP_lit29";
8512 return "DW_OP_lit30";
8514 return "DW_OP_lit31";
8516 return "DW_OP_reg0";
8518 return "DW_OP_reg1";
8520 return "DW_OP_reg2";
8522 return "DW_OP_reg3";
8524 return "DW_OP_reg4";
8526 return "DW_OP_reg5";
8528 return "DW_OP_reg6";
8530 return "DW_OP_reg7";
8532 return "DW_OP_reg8";
8534 return "DW_OP_reg9";
8536 return "DW_OP_reg10";
8538 return "DW_OP_reg11";
8540 return "DW_OP_reg12";
8542 return "DW_OP_reg13";
8544 return "DW_OP_reg14";
8546 return "DW_OP_reg15";
8548 return "DW_OP_reg16";
8550 return "DW_OP_reg17";
8552 return "DW_OP_reg18";
8554 return "DW_OP_reg19";
8556 return "DW_OP_reg20";
8558 return "DW_OP_reg21";
8560 return "DW_OP_reg22";
8562 return "DW_OP_reg23";
8564 return "DW_OP_reg24";
8566 return "DW_OP_reg25";
8568 return "DW_OP_reg26";
8570 return "DW_OP_reg27";
8572 return "DW_OP_reg28";
8574 return "DW_OP_reg29";
8576 return "DW_OP_reg30";
8578 return "DW_OP_reg31";
8580 return "DW_OP_breg0";
8582 return "DW_OP_breg1";
8584 return "DW_OP_breg2";
8586 return "DW_OP_breg3";
8588 return "DW_OP_breg4";
8590 return "DW_OP_breg5";
8592 return "DW_OP_breg6";
8594 return "DW_OP_breg7";
8596 return "DW_OP_breg8";
8598 return "DW_OP_breg9";
8600 return "DW_OP_breg10";
8602 return "DW_OP_breg11";
8604 return "DW_OP_breg12";
8606 return "DW_OP_breg13";
8608 return "DW_OP_breg14";
8610 return "DW_OP_breg15";
8612 return "DW_OP_breg16";
8614 return "DW_OP_breg17";
8616 return "DW_OP_breg18";
8618 return "DW_OP_breg19";
8620 return "DW_OP_breg20";
8622 return "DW_OP_breg21";
8624 return "DW_OP_breg22";
8626 return "DW_OP_breg23";
8628 return "DW_OP_breg24";
8630 return "DW_OP_breg25";
8632 return "DW_OP_breg26";
8634 return "DW_OP_breg27";
8636 return "DW_OP_breg28";
8638 return "DW_OP_breg29";
8640 return "DW_OP_breg30";
8642 return "DW_OP_breg31";
8644 return "DW_OP_regx";
8646 return "DW_OP_fbreg";
8648 return "DW_OP_bregx";
8650 return "DW_OP_piece";
8651 case DW_OP_deref_size
:
8652 return "DW_OP_deref_size";
8653 case DW_OP_xderef_size
:
8654 return "DW_OP_xderef_size";
8657 /* DWARF 3 extensions. */
8658 case DW_OP_push_object_address
:
8659 return "DW_OP_push_object_address";
8661 return "DW_OP_call2";
8663 return "DW_OP_call4";
8664 case DW_OP_call_ref
:
8665 return "DW_OP_call_ref";
8666 /* GNU extensions. */
8667 case DW_OP_form_tls_address
:
8668 return "DW_OP_form_tls_address";
8669 case DW_OP_call_frame_cfa
:
8670 return "DW_OP_call_frame_cfa";
8671 case DW_OP_bit_piece
:
8672 return "DW_OP_bit_piece";
8673 case DW_OP_GNU_push_tls_address
:
8674 return "DW_OP_GNU_push_tls_address";
8675 case DW_OP_GNU_uninit
:
8676 return "DW_OP_GNU_uninit";
8677 /* HP extensions. */
8678 case DW_OP_HP_is_value
:
8679 return "DW_OP_HP_is_value";
8680 case DW_OP_HP_fltconst4
:
8681 return "DW_OP_HP_fltconst4";
8682 case DW_OP_HP_fltconst8
:
8683 return "DW_OP_HP_fltconst8";
8684 case DW_OP_HP_mod_range
:
8685 return "DW_OP_HP_mod_range";
8686 case DW_OP_HP_unmod_range
:
8687 return "DW_OP_HP_unmod_range";
8689 return "DW_OP_HP_tls";
8691 return "OP_<unknown>";
8696 dwarf_bool_name (unsigned mybool
)
8704 /* Convert a DWARF type code into its string name. */
8707 dwarf_type_encoding_name (unsigned enc
)
8712 return "DW_ATE_void";
8713 case DW_ATE_address
:
8714 return "DW_ATE_address";
8715 case DW_ATE_boolean
:
8716 return "DW_ATE_boolean";
8717 case DW_ATE_complex_float
:
8718 return "DW_ATE_complex_float";
8720 return "DW_ATE_float";
8722 return "DW_ATE_signed";
8723 case DW_ATE_signed_char
:
8724 return "DW_ATE_signed_char";
8725 case DW_ATE_unsigned
:
8726 return "DW_ATE_unsigned";
8727 case DW_ATE_unsigned_char
:
8728 return "DW_ATE_unsigned_char";
8730 case DW_ATE_imaginary_float
:
8731 return "DW_ATE_imaginary_float";
8732 case DW_ATE_packed_decimal
:
8733 return "DW_ATE_packed_decimal";
8734 case DW_ATE_numeric_string
:
8735 return "DW_ATE_numeric_string";
8737 return "DW_ATE_edited";
8738 case DW_ATE_signed_fixed
:
8739 return "DW_ATE_signed_fixed";
8740 case DW_ATE_unsigned_fixed
:
8741 return "DW_ATE_unsigned_fixed";
8742 case DW_ATE_decimal_float
:
8743 return "DW_ATE_decimal_float";
8744 /* HP extensions. */
8745 case DW_ATE_HP_float80
:
8746 return "DW_ATE_HP_float80";
8747 case DW_ATE_HP_complex_float80
:
8748 return "DW_ATE_HP_complex_float80";
8749 case DW_ATE_HP_float128
:
8750 return "DW_ATE_HP_float128";
8751 case DW_ATE_HP_complex_float128
:
8752 return "DW_ATE_HP_complex_float128";
8753 case DW_ATE_HP_floathpintel
:
8754 return "DW_ATE_HP_floathpintel";
8755 case DW_ATE_HP_imaginary_float80
:
8756 return "DW_ATE_HP_imaginary_float80";
8757 case DW_ATE_HP_imaginary_float128
:
8758 return "DW_ATE_HP_imaginary_float128";
8760 return "DW_ATE_<unknown>";
8764 /* Convert a DWARF call frame info operation to its string name. */
8768 dwarf_cfi_name (unsigned cfi_opc
)
8772 case DW_CFA_advance_loc
:
8773 return "DW_CFA_advance_loc";
8775 return "DW_CFA_offset";
8776 case DW_CFA_restore
:
8777 return "DW_CFA_restore";
8779 return "DW_CFA_nop";
8780 case DW_CFA_set_loc
:
8781 return "DW_CFA_set_loc";
8782 case DW_CFA_advance_loc1
:
8783 return "DW_CFA_advance_loc1";
8784 case DW_CFA_advance_loc2
:
8785 return "DW_CFA_advance_loc2";
8786 case DW_CFA_advance_loc4
:
8787 return "DW_CFA_advance_loc4";
8788 case DW_CFA_offset_extended
:
8789 return "DW_CFA_offset_extended";
8790 case DW_CFA_restore_extended
:
8791 return "DW_CFA_restore_extended";
8792 case DW_CFA_undefined
:
8793 return "DW_CFA_undefined";
8794 case DW_CFA_same_value
:
8795 return "DW_CFA_same_value";
8796 case DW_CFA_register
:
8797 return "DW_CFA_register";
8798 case DW_CFA_remember_state
:
8799 return "DW_CFA_remember_state";
8800 case DW_CFA_restore_state
:
8801 return "DW_CFA_restore_state";
8802 case DW_CFA_def_cfa
:
8803 return "DW_CFA_def_cfa";
8804 case DW_CFA_def_cfa_register
:
8805 return "DW_CFA_def_cfa_register";
8806 case DW_CFA_def_cfa_offset
:
8807 return "DW_CFA_def_cfa_offset";
8809 case DW_CFA_def_cfa_expression
:
8810 return "DW_CFA_def_cfa_expression";
8811 case DW_CFA_expression
:
8812 return "DW_CFA_expression";
8813 case DW_CFA_offset_extended_sf
:
8814 return "DW_CFA_offset_extended_sf";
8815 case DW_CFA_def_cfa_sf
:
8816 return "DW_CFA_def_cfa_sf";
8817 case DW_CFA_def_cfa_offset_sf
:
8818 return "DW_CFA_def_cfa_offset_sf";
8819 case DW_CFA_val_offset
:
8820 return "DW_CFA_val_offset";
8821 case DW_CFA_val_offset_sf
:
8822 return "DW_CFA_val_offset_sf";
8823 case DW_CFA_val_expression
:
8824 return "DW_CFA_val_expression";
8825 /* SGI/MIPS specific. */
8826 case DW_CFA_MIPS_advance_loc8
:
8827 return "DW_CFA_MIPS_advance_loc8";
8828 /* GNU extensions. */
8829 case DW_CFA_GNU_window_save
:
8830 return "DW_CFA_GNU_window_save";
8831 case DW_CFA_GNU_args_size
:
8832 return "DW_CFA_GNU_args_size";
8833 case DW_CFA_GNU_negative_offset_extended
:
8834 return "DW_CFA_GNU_negative_offset_extended";
8836 return "DW_CFA_<unknown>";
8842 dump_die (struct die_info
*die
)
8846 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
8847 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
8848 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
8849 dwarf_bool_name (die
->child
!= NULL
));
8851 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
8852 for (i
= 0; i
< die
->num_attrs
; ++i
)
8854 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
8855 dwarf_attr_name (die
->attrs
[i
].name
),
8856 dwarf_form_name (die
->attrs
[i
].form
));
8857 switch (die
->attrs
[i
].form
)
8859 case DW_FORM_ref_addr
:
8861 fprintf_unfiltered (gdb_stderr
, "address: ");
8862 deprecated_print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
8864 case DW_FORM_block2
:
8865 case DW_FORM_block4
:
8867 case DW_FORM_block1
:
8868 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
8873 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
8874 (long) (DW_ADDR (&die
->attrs
[i
])));
8882 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
8884 case DW_FORM_string
:
8886 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
8887 DW_STRING (&die
->attrs
[i
])
8888 ? DW_STRING (&die
->attrs
[i
]) : "");
8891 if (DW_UNSND (&die
->attrs
[i
]))
8892 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
8894 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
8896 case DW_FORM_indirect
:
8897 /* the reader will have reduced the indirect form to
8898 the "base form" so this form should not occur */
8899 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
8902 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
8903 die
->attrs
[i
].form
);
8905 fprintf_unfiltered (gdb_stderr
, "\n");
8910 dump_die_list (struct die_info
*die
)
8915 if (die
->child
!= NULL
)
8916 dump_die_list (die
->child
);
8917 if (die
->sibling
!= NULL
)
8918 dump_die_list (die
->sibling
);
8923 store_in_ref_table (unsigned int offset
, struct die_info
*die
,
8924 struct dwarf2_cu
*cu
)
8927 struct die_info
*old
;
8929 h
= (offset
% REF_HASH_SIZE
);
8930 old
= cu
->die_ref_table
[h
];
8931 die
->next_ref
= old
;
8932 cu
->die_ref_table
[h
] = die
;
8936 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
8938 unsigned int result
= 0;
8942 case DW_FORM_ref_addr
:
8947 case DW_FORM_ref_udata
:
8948 result
= DW_ADDR (attr
);
8951 complaint (&symfile_complaints
,
8952 _("unsupported die ref attribute form: '%s'"),
8953 dwarf_form_name (attr
->form
));
8958 /* Return the constant value held by the given attribute. Return -1
8959 if the value held by the attribute is not constant. */
8962 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
8964 if (attr
->form
== DW_FORM_sdata
)
8965 return DW_SND (attr
);
8966 else if (attr
->form
== DW_FORM_udata
8967 || attr
->form
== DW_FORM_data1
8968 || attr
->form
== DW_FORM_data2
8969 || attr
->form
== DW_FORM_data4
8970 || attr
->form
== DW_FORM_data8
)
8971 return DW_UNSND (attr
);
8974 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
8975 dwarf_form_name (attr
->form
));
8976 return default_value
;
8980 static struct die_info
*
8981 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
8982 struct dwarf2_cu
*cu
)
8984 struct die_info
*die
;
8985 unsigned int offset
;
8987 struct die_info temp_die
;
8988 struct dwarf2_cu
*target_cu
;
8990 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
8992 if (DW_ADDR (attr
) < cu
->header
.offset
8993 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
8995 struct dwarf2_per_cu_data
*per_cu
;
8996 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
8998 target_cu
= per_cu
->cu
;
9003 h
= (offset
% REF_HASH_SIZE
);
9004 die
= target_cu
->die_ref_table
[h
];
9007 if (die
->offset
== offset
)
9009 die
= die
->next_ref
;
9012 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9013 "at 0x%lx [in module %s]"),
9014 (long) src_die
->offset
, (long) offset
, cu
->objfile
->name
);
9019 static struct type
*
9020 dwarf2_fundamental_type (struct objfile
*objfile
, int typeid,
9021 struct dwarf2_cu
*cu
)
9023 if (typeid < 0 || typeid >= FT_NUM_MEMBERS
)
9025 error (_("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]"),
9026 typeid, objfile
->name
);
9029 /* Look for this particular type in the fundamental type vector. If
9030 one is not found, create and install one appropriate for the
9031 current language and the current target machine. */
9033 if (cu
->ftypes
[typeid] == NULL
)
9035 cu
->ftypes
[typeid] = cu
->language_defn
->la_fund_type (objfile
, typeid);
9038 return (cu
->ftypes
[typeid]);
9041 /* Decode simple location descriptions.
9042 Given a pointer to a dwarf block that defines a location, compute
9043 the location and return the value.
9045 NOTE drow/2003-11-18: This function is called in two situations
9046 now: for the address of static or global variables (partial symbols
9047 only) and for offsets into structures which are expected to be
9048 (more or less) constant. The partial symbol case should go away,
9049 and only the constant case should remain. That will let this
9050 function complain more accurately. A few special modes are allowed
9051 without complaint for global variables (for instance, global
9052 register values and thread-local values).
9054 A location description containing no operations indicates that the
9055 object is optimized out. The return value is 0 for that case.
9056 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9057 callers will only want a very basic result and this can become a
9060 Note that stack[0] is unused except as a default error return.
9061 Note that stack overflow is not yet handled. */
9064 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9066 struct objfile
*objfile
= cu
->objfile
;
9067 struct comp_unit_head
*cu_header
= &cu
->header
;
9069 int size
= blk
->size
;
9070 gdb_byte
*data
= blk
->data
;
9071 CORE_ADDR stack
[64];
9073 unsigned int bytes_read
, unsnd
;
9117 stack
[++stacki
] = op
- DW_OP_lit0
;
9152 stack
[++stacki
] = op
- DW_OP_reg0
;
9154 dwarf2_complex_location_expr_complaint ();
9158 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9160 stack
[++stacki
] = unsnd
;
9162 dwarf2_complex_location_expr_complaint ();
9166 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9172 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9177 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9182 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9187 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9192 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9197 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9202 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9208 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9213 stack
[stacki
+ 1] = stack
[stacki
];
9218 stack
[stacki
- 1] += stack
[stacki
];
9222 case DW_OP_plus_uconst
:
9223 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9228 stack
[stacki
- 1] -= stack
[stacki
];
9233 /* If we're not the last op, then we definitely can't encode
9234 this using GDB's address_class enum. This is valid for partial
9235 global symbols, although the variable's address will be bogus
9238 dwarf2_complex_location_expr_complaint ();
9241 case DW_OP_GNU_push_tls_address
:
9242 /* The top of the stack has the offset from the beginning
9243 of the thread control block at which the variable is located. */
9244 /* Nothing should follow this operator, so the top of stack would
9246 /* This is valid for partial global symbols, but the variable's
9247 address will be bogus in the psymtab. */
9249 dwarf2_complex_location_expr_complaint ();
9252 case DW_OP_GNU_uninit
:
9256 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9257 dwarf_stack_op_name (op
));
9258 return (stack
[stacki
]);
9261 return (stack
[stacki
]);
9264 /* memory allocation interface */
9266 static struct dwarf_block
*
9267 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9269 struct dwarf_block
*blk
;
9271 blk
= (struct dwarf_block
*)
9272 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9276 static struct abbrev_info
*
9277 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9279 struct abbrev_info
*abbrev
;
9281 abbrev
= (struct abbrev_info
*)
9282 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9283 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9287 static struct die_info
*
9288 dwarf_alloc_die (void)
9290 struct die_info
*die
;
9292 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
9293 memset (die
, 0, sizeof (struct die_info
));
9298 /* Macro support. */
9301 /* Return the full name of file number I in *LH's file name table.
9302 Use COMP_DIR as the name of the current directory of the
9303 compilation. The result is allocated using xmalloc; the caller is
9304 responsible for freeing it. */
9306 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9308 /* Is the file number a valid index into the line header's file name
9309 table? Remember that file numbers start with one, not zero. */
9310 if (1 <= file
&& file
<= lh
->num_file_names
)
9312 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9314 if (IS_ABSOLUTE_PATH (fe
->name
))
9315 return xstrdup (fe
->name
);
9323 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9329 dir_len
= strlen (dir
);
9330 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9331 strcpy (full_name
, dir
);
9332 full_name
[dir_len
] = '/';
9333 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9337 return xstrdup (fe
->name
);
9342 /* The compiler produced a bogus file number. We can at least
9343 record the macro definitions made in the file, even if we
9344 won't be able to find the file by name. */
9346 sprintf (fake_name
, "<bad macro file number %d>", file
);
9348 complaint (&symfile_complaints
,
9349 _("bad file number in macro information (%d)"),
9352 return xstrdup (fake_name
);
9357 static struct macro_source_file
*
9358 macro_start_file (int file
, int line
,
9359 struct macro_source_file
*current_file
,
9360 const char *comp_dir
,
9361 struct line_header
*lh
, struct objfile
*objfile
)
9363 /* The full name of this source file. */
9364 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9366 /* We don't create a macro table for this compilation unit
9367 at all until we actually get a filename. */
9368 if (! pending_macros
)
9369 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9370 objfile
->macro_cache
);
9373 /* If we have no current file, then this must be the start_file
9374 directive for the compilation unit's main source file. */
9375 current_file
= macro_set_main (pending_macros
, full_name
);
9377 current_file
= macro_include (current_file
, line
, full_name
);
9381 return current_file
;
9385 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9386 followed by a null byte. */
9388 copy_string (const char *buf
, int len
)
9390 char *s
= xmalloc (len
+ 1);
9391 memcpy (s
, buf
, len
);
9399 consume_improper_spaces (const char *p
, const char *body
)
9403 complaint (&symfile_complaints
,
9404 _("macro definition contains spaces in formal argument list:\n`%s'"),
9416 parse_macro_definition (struct macro_source_file
*file
, int line
,
9421 /* The body string takes one of two forms. For object-like macro
9422 definitions, it should be:
9424 <macro name> " " <definition>
9426 For function-like macro definitions, it should be:
9428 <macro name> "() " <definition>
9430 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9432 Spaces may appear only where explicitly indicated, and in the
9435 The Dwarf 2 spec says that an object-like macro's name is always
9436 followed by a space, but versions of GCC around March 2002 omit
9437 the space when the macro's definition is the empty string.
9439 The Dwarf 2 spec says that there should be no spaces between the
9440 formal arguments in a function-like macro's formal argument list,
9441 but versions of GCC around March 2002 include spaces after the
9445 /* Find the extent of the macro name. The macro name is terminated
9446 by either a space or null character (for an object-like macro) or
9447 an opening paren (for a function-like macro). */
9448 for (p
= body
; *p
; p
++)
9449 if (*p
== ' ' || *p
== '(')
9452 if (*p
== ' ' || *p
== '\0')
9454 /* It's an object-like macro. */
9455 int name_len
= p
- body
;
9456 char *name
= copy_string (body
, name_len
);
9457 const char *replacement
;
9460 replacement
= body
+ name_len
+ 1;
9463 dwarf2_macro_malformed_definition_complaint (body
);
9464 replacement
= body
+ name_len
;
9467 macro_define_object (file
, line
, name
, replacement
);
9473 /* It's a function-like macro. */
9474 char *name
= copy_string (body
, p
- body
);
9477 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9481 p
= consume_improper_spaces (p
, body
);
9483 /* Parse the formal argument list. */
9484 while (*p
&& *p
!= ')')
9486 /* Find the extent of the current argument name. */
9487 const char *arg_start
= p
;
9489 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9492 if (! *p
|| p
== arg_start
)
9493 dwarf2_macro_malformed_definition_complaint (body
);
9496 /* Make sure argv has room for the new argument. */
9497 if (argc
>= argv_size
)
9500 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9503 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9506 p
= consume_improper_spaces (p
, body
);
9508 /* Consume the comma, if present. */
9513 p
= consume_improper_spaces (p
, body
);
9522 /* Perfectly formed definition, no complaints. */
9523 macro_define_function (file
, line
, name
,
9524 argc
, (const char **) argv
,
9526 else if (*p
== '\0')
9528 /* Complain, but do define it. */
9529 dwarf2_macro_malformed_definition_complaint (body
);
9530 macro_define_function (file
, line
, name
,
9531 argc
, (const char **) argv
,
9535 /* Just complain. */
9536 dwarf2_macro_malformed_definition_complaint (body
);
9539 /* Just complain. */
9540 dwarf2_macro_malformed_definition_complaint (body
);
9546 for (i
= 0; i
< argc
; i
++)
9552 dwarf2_macro_malformed_definition_complaint (body
);
9557 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9558 char *comp_dir
, bfd
*abfd
,
9559 struct dwarf2_cu
*cu
)
9561 gdb_byte
*mac_ptr
, *mac_end
;
9562 struct macro_source_file
*current_file
= 0;
9564 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9566 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9570 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9571 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9572 + dwarf2_per_objfile
->macinfo_size
;
9576 enum dwarf_macinfo_record_type macinfo_type
;
9578 /* Do we at least have room for a macinfo type byte? */
9579 if (mac_ptr
>= mac_end
)
9581 dwarf2_macros_too_long_complaint ();
9585 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9588 switch (macinfo_type
)
9590 /* A zero macinfo type indicates the end of the macro
9595 case DW_MACINFO_define
:
9596 case DW_MACINFO_undef
:
9598 unsigned int bytes_read
;
9602 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9603 mac_ptr
+= bytes_read
;
9604 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9605 mac_ptr
+= bytes_read
;
9608 complaint (&symfile_complaints
,
9609 _("debug info gives macro %s outside of any file: %s"),
9611 DW_MACINFO_define
? "definition" : macinfo_type
==
9612 DW_MACINFO_undef
? "undefinition" :
9613 "something-or-other", body
);
9616 if (macinfo_type
== DW_MACINFO_define
)
9617 parse_macro_definition (current_file
, line
, body
);
9618 else if (macinfo_type
== DW_MACINFO_undef
)
9619 macro_undef (current_file
, line
, body
);
9624 case DW_MACINFO_start_file
:
9626 unsigned int bytes_read
;
9629 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9630 mac_ptr
+= bytes_read
;
9631 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9632 mac_ptr
+= bytes_read
;
9634 current_file
= macro_start_file (file
, line
,
9635 current_file
, comp_dir
,
9640 case DW_MACINFO_end_file
:
9642 complaint (&symfile_complaints
,
9643 _("macro debug info has an unmatched `close_file' directive"));
9646 current_file
= current_file
->included_by
;
9649 enum dwarf_macinfo_record_type next_type
;
9651 /* GCC circa March 2002 doesn't produce the zero
9652 type byte marking the end of the compilation
9653 unit. Complain if it's not there, but exit no
9656 /* Do we at least have room for a macinfo type byte? */
9657 if (mac_ptr
>= mac_end
)
9659 dwarf2_macros_too_long_complaint ();
9663 /* We don't increment mac_ptr here, so this is just
9665 next_type
= read_1_byte (abfd
, mac_ptr
);
9667 complaint (&symfile_complaints
,
9668 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9675 case DW_MACINFO_vendor_ext
:
9677 unsigned int bytes_read
;
9681 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9682 mac_ptr
+= bytes_read
;
9683 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9684 mac_ptr
+= bytes_read
;
9686 /* We don't recognize any vendor extensions. */
9693 /* Check if the attribute's form is a DW_FORM_block*
9694 if so return true else false. */
9696 attr_form_is_block (struct attribute
*attr
)
9698 return (attr
== NULL
? 0 :
9699 attr
->form
== DW_FORM_block1
9700 || attr
->form
== DW_FORM_block2
9701 || attr
->form
== DW_FORM_block4
9702 || attr
->form
== DW_FORM_block
);
9706 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9707 struct dwarf2_cu
*cu
)
9709 struct objfile
*objfile
= cu
->objfile
;
9711 /* Save the master objfile, so that we can report and look up the
9712 correct file containing this variable. */
9713 if (objfile
->separate_debug_objfile_backlink
)
9714 objfile
= objfile
->separate_debug_objfile_backlink
;
9716 if ((attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
9717 /* ".debug_loc" may not exist at all, or the offset may be outside
9718 the section. If so, fall through to the complaint in the
9720 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9722 struct dwarf2_loclist_baton
*baton
;
9724 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9725 sizeof (struct dwarf2_loclist_baton
));
9726 baton
->objfile
= objfile
;
9728 /* We don't know how long the location list is, but make sure we
9729 don't run off the edge of the section. */
9730 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9731 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
9732 baton
->base_address
= cu
->header
.base_address
;
9733 if (cu
->header
.base_known
== 0)
9734 complaint (&symfile_complaints
,
9735 _("Location list used without specifying the CU base address."));
9737 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
9738 SYMBOL_LOCATION_BATON (sym
) = baton
;
9742 struct dwarf2_locexpr_baton
*baton
;
9744 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9745 sizeof (struct dwarf2_locexpr_baton
));
9746 baton
->objfile
= objfile
;
9748 if (attr_form_is_block (attr
))
9750 /* Note that we're just copying the block's data pointer
9751 here, not the actual data. We're still pointing into the
9752 info_buffer for SYM's objfile; right now we never release
9753 that buffer, but when we do clean up properly this may
9755 baton
->size
= DW_BLOCK (attr
)->size
;
9756 baton
->data
= DW_BLOCK (attr
)->data
;
9760 dwarf2_invalid_attrib_class_complaint ("location description",
9761 SYMBOL_NATURAL_NAME (sym
));
9766 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
9767 SYMBOL_LOCATION_BATON (sym
) = baton
;
9771 /* Locate the compilation unit from CU's objfile which contains the
9772 DIE at OFFSET. Raises an error on failure. */
9774 static struct dwarf2_per_cu_data
*
9775 dwarf2_find_containing_comp_unit (unsigned long offset
,
9776 struct objfile
*objfile
)
9778 struct dwarf2_per_cu_data
*this_cu
;
9782 high
= dwarf2_per_objfile
->n_comp_units
- 1;
9785 int mid
= low
+ (high
- low
) / 2;
9786 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
9791 gdb_assert (low
== high
);
9792 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
9795 error (_("Dwarf Error: could not find partial DIE containing "
9796 "offset 0x%lx [in module %s]"),
9797 (long) offset
, bfd_get_filename (objfile
->obfd
));
9799 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
9800 return dwarf2_per_objfile
->all_comp_units
[low
-1];
9804 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
9805 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
9806 && offset
>= this_cu
->offset
+ this_cu
->length
)
9807 error (_("invalid dwarf2 offset %ld"), offset
);
9808 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
9813 /* Locate the compilation unit from OBJFILE which is located at exactly
9814 OFFSET. Raises an error on failure. */
9816 static struct dwarf2_per_cu_data
*
9817 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
9819 struct dwarf2_per_cu_data
*this_cu
;
9820 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
9821 if (this_cu
->offset
!= offset
)
9822 error (_("no compilation unit with offset %ld."), offset
);
9826 /* Release one cached compilation unit, CU. We unlink it from the tree
9827 of compilation units, but we don't remove it from the read_in_chain;
9828 the caller is responsible for that. */
9831 free_one_comp_unit (void *data
)
9833 struct dwarf2_cu
*cu
= data
;
9835 if (cu
->per_cu
!= NULL
)
9836 cu
->per_cu
->cu
= NULL
;
9839 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9841 free_die_list (cu
->dies
);
9846 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9847 when we're finished with it. We can't free the pointer itself, but be
9848 sure to unlink it from the cache. Also release any associated storage
9849 and perform cache maintenance.
9851 Only used during partial symbol parsing. */
9854 free_stack_comp_unit (void *data
)
9856 struct dwarf2_cu
*cu
= data
;
9858 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9859 cu
->partial_dies
= NULL
;
9861 if (cu
->per_cu
!= NULL
)
9863 /* This compilation unit is on the stack in our caller, so we
9864 should not xfree it. Just unlink it. */
9865 cu
->per_cu
->cu
= NULL
;
9868 /* If we had a per-cu pointer, then we may have other compilation
9869 units loaded, so age them now. */
9870 age_cached_comp_units ();
9874 /* Free all cached compilation units. */
9877 free_cached_comp_units (void *data
)
9879 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9881 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9882 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9883 while (per_cu
!= NULL
)
9885 struct dwarf2_per_cu_data
*next_cu
;
9887 next_cu
= per_cu
->cu
->read_in_chain
;
9889 free_one_comp_unit (per_cu
->cu
);
9890 *last_chain
= next_cu
;
9896 /* Increase the age counter on each cached compilation unit, and free
9897 any that are too old. */
9900 age_cached_comp_units (void)
9902 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9904 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
9905 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9906 while (per_cu
!= NULL
)
9908 per_cu
->cu
->last_used
++;
9909 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
9910 dwarf2_mark (per_cu
->cu
);
9911 per_cu
= per_cu
->cu
->read_in_chain
;
9914 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9915 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9916 while (per_cu
!= NULL
)
9918 struct dwarf2_per_cu_data
*next_cu
;
9920 next_cu
= per_cu
->cu
->read_in_chain
;
9922 if (!per_cu
->cu
->mark
)
9924 free_one_comp_unit (per_cu
->cu
);
9925 *last_chain
= next_cu
;
9928 last_chain
= &per_cu
->cu
->read_in_chain
;
9934 /* Remove a single compilation unit from the cache. */
9937 free_one_cached_comp_unit (void *target_cu
)
9939 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9941 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9942 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9943 while (per_cu
!= NULL
)
9945 struct dwarf2_per_cu_data
*next_cu
;
9947 next_cu
= per_cu
->cu
->read_in_chain
;
9949 if (per_cu
->cu
== target_cu
)
9951 free_one_comp_unit (per_cu
->cu
);
9952 *last_chain
= next_cu
;
9956 last_chain
= &per_cu
->cu
->read_in_chain
;
9962 /* A pair of DIE offset and GDB type pointer. We store these
9963 in a hash table separate from the DIEs, and preserve them
9964 when the DIEs are flushed out of cache. */
9966 struct dwarf2_offset_and_type
9968 unsigned int offset
;
9972 /* Hash function for a dwarf2_offset_and_type. */
9975 offset_and_type_hash (const void *item
)
9977 const struct dwarf2_offset_and_type
*ofs
= item
;
9981 /* Equality function for a dwarf2_offset_and_type. */
9984 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
9986 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
9987 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
9988 return ofs_lhs
->offset
== ofs_rhs
->offset
;
9991 /* Set the type associated with DIE to TYPE. Save it in CU's hash
9992 table if necessary. */
9995 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
9997 struct dwarf2_offset_and_type
**slot
, ofs
;
10001 if (cu
->per_cu
== NULL
)
10004 if (cu
->per_cu
->type_hash
== NULL
)
10005 cu
->per_cu
->type_hash
10006 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10007 offset_and_type_hash
,
10008 offset_and_type_eq
,
10010 &cu
->objfile
->objfile_obstack
,
10011 hashtab_obstack_allocate
,
10012 dummy_obstack_deallocate
);
10014 ofs
.offset
= die
->offset
;
10016 slot
= (struct dwarf2_offset_and_type
**)
10017 htab_find_slot_with_hash (cu
->per_cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10018 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10022 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10023 have a saved type. */
10025 static struct type
*
10026 get_die_type (struct die_info
*die
, htab_t type_hash
)
10028 struct dwarf2_offset_and_type
*slot
, ofs
;
10030 ofs
.offset
= die
->offset
;
10031 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10038 /* Restore the types of the DIE tree starting at START_DIE from the hash
10039 table saved in CU. */
10042 reset_die_and_siblings_types (struct die_info
*start_die
, struct dwarf2_cu
*cu
)
10044 struct die_info
*die
;
10046 if (cu
->per_cu
->type_hash
== NULL
)
10049 for (die
= start_die
; die
!= NULL
; die
= die
->sibling
)
10051 die
->type
= get_die_type (die
, cu
->per_cu
->type_hash
);
10052 if (die
->child
!= NULL
)
10053 reset_die_and_siblings_types (die
->child
, cu
);
10057 /* Set the mark field in CU and in every other compilation unit in the
10058 cache that we must keep because we are keeping CU. */
10060 /* Add a dependence relationship from CU to REF_PER_CU. */
10063 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10064 struct dwarf2_per_cu_data
*ref_per_cu
)
10068 if (cu
->dependencies
== NULL
)
10070 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10071 NULL
, &cu
->comp_unit_obstack
,
10072 hashtab_obstack_allocate
,
10073 dummy_obstack_deallocate
);
10075 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10077 *slot
= ref_per_cu
;
10080 /* Set the mark field in CU and in every other compilation unit in the
10081 cache that we must keep because we are keeping CU. */
10084 dwarf2_mark_helper (void **slot
, void *data
)
10086 struct dwarf2_per_cu_data
*per_cu
;
10088 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10089 if (per_cu
->cu
->mark
)
10091 per_cu
->cu
->mark
= 1;
10093 if (per_cu
->cu
->dependencies
!= NULL
)
10094 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10100 dwarf2_mark (struct dwarf2_cu
*cu
)
10105 if (cu
->dependencies
!= NULL
)
10106 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10110 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10114 per_cu
->cu
->mark
= 0;
10115 per_cu
= per_cu
->cu
->read_in_chain
;
10119 /* Trivial hash function for partial_die_info: the hash value of a DIE
10120 is its offset in .debug_info for this objfile. */
10123 partial_die_hash (const void *item
)
10125 const struct partial_die_info
*part_die
= item
;
10126 return part_die
->offset
;
10129 /* Trivial comparison function for partial_die_info structures: two DIEs
10130 are equal if they have the same offset. */
10133 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10135 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10136 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10137 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10140 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10141 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10144 set_dwarf2_cmd (char *args
, int from_tty
)
10146 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10150 show_dwarf2_cmd (char *args
, int from_tty
)
10152 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10155 void _initialize_dwarf2_read (void);
10158 _initialize_dwarf2_read (void)
10160 dwarf2_objfile_data_key
= register_objfile_data ();
10162 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10163 Set DWARF 2 specific variables.\n\
10164 Configure DWARF 2 variables such as the cache size"),
10165 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10166 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10168 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10169 Show DWARF 2 specific variables\n\
10170 Show DWARF 2 variables such as the cache size"),
10171 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10172 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10174 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10175 &dwarf2_max_cache_age
, _("\
10176 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10177 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10178 A higher limit means that cached compilation units will be stored\n\
10179 in memory longer, and more total memory will be used. Zero disables\n\
10180 caching, which can slow down startup."),
10182 show_dwarf2_max_cache_age
,
10183 &set_dwarf2_cmdlist
,
10184 &show_dwarf2_cmdlist
);