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). */
70 #ifndef DWARF2_REG_TO_REGNUM
71 #define DWARF2_REG_TO_REGNUM(REG) (REG)
75 /* .debug_info header for a compilation unit
76 Because of alignment constraints, this structure has padding and cannot
77 be mapped directly onto the beginning of the .debug_info section. */
78 typedef struct comp_unit_header
80 unsigned int length
; /* length of the .debug_info
82 unsigned short version
; /* version number -- 2 for DWARF
84 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
85 unsigned char addr_size
; /* byte size of an address -- 4 */
88 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
91 /* .debug_pubnames header
92 Because of alignment constraints, this structure has padding and cannot
93 be mapped directly onto the beginning of the .debug_info section. */
94 typedef struct pubnames_header
96 unsigned int length
; /* length of the .debug_pubnames
98 unsigned char version
; /* version number -- 2 for DWARF
100 unsigned int info_offset
; /* offset into .debug_info section */
101 unsigned int info_size
; /* byte size of .debug_info section
105 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
107 /* .debug_pubnames header
108 Because of alignment constraints, this structure has padding and cannot
109 be mapped directly onto the beginning of the .debug_info section. */
110 typedef struct aranges_header
112 unsigned int length
; /* byte len of the .debug_aranges
114 unsigned short version
; /* version number -- 2 for DWARF
116 unsigned int info_offset
; /* offset into .debug_info section */
117 unsigned char addr_size
; /* byte size of an address */
118 unsigned char seg_size
; /* byte size of segment descriptor */
121 #define _ACTUAL_ARANGES_HEADER_SIZE 12
123 /* .debug_line statement program prologue
124 Because of alignment constraints, this structure has padding and cannot
125 be mapped directly onto the beginning of the .debug_info section. */
126 typedef struct statement_prologue
128 unsigned int total_length
; /* byte length of the statement
130 unsigned short version
; /* version number -- 2 for DWARF
132 unsigned int prologue_length
; /* # bytes between prologue &
134 unsigned char minimum_instruction_length
; /* byte size of
136 unsigned char default_is_stmt
; /* initial value of is_stmt
139 unsigned char line_range
;
140 unsigned char opcode_base
; /* number assigned to first special
142 unsigned char *standard_opcode_lengths
;
146 static const struct objfile_data
*dwarf2_objfile_data_key
;
148 struct dwarf2_per_objfile
150 /* Sizes of debugging sections. */
151 unsigned int info_size
;
152 unsigned int abbrev_size
;
153 unsigned int line_size
;
154 unsigned int pubnames_size
;
155 unsigned int aranges_size
;
156 unsigned int loc_size
;
157 unsigned int macinfo_size
;
158 unsigned int str_size
;
159 unsigned int ranges_size
;
160 unsigned int frame_size
;
161 unsigned int eh_frame_size
;
163 /* Loaded data from the sections. */
164 gdb_byte
*info_buffer
;
165 gdb_byte
*abbrev_buffer
;
166 gdb_byte
*line_buffer
;
167 gdb_byte
*str_buffer
;
168 gdb_byte
*macinfo_buffer
;
169 gdb_byte
*ranges_buffer
;
170 gdb_byte
*loc_buffer
;
172 /* A list of all the compilation units. This is used to locate
173 the target compilation unit of a particular reference. */
174 struct dwarf2_per_cu_data
**all_comp_units
;
176 /* The number of compilation units in ALL_COMP_UNITS. */
179 /* A chain of compilation units that are currently read in, so that
180 they can be freed later. */
181 struct dwarf2_per_cu_data
*read_in_chain
;
183 /* A flag indicating wether this objfile has a section loaded at a
185 int has_section_at_zero
;
188 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
190 static asection
*dwarf_info_section
;
191 static asection
*dwarf_abbrev_section
;
192 static asection
*dwarf_line_section
;
193 static asection
*dwarf_pubnames_section
;
194 static asection
*dwarf_aranges_section
;
195 static asection
*dwarf_loc_section
;
196 static asection
*dwarf_macinfo_section
;
197 static asection
*dwarf_str_section
;
198 static asection
*dwarf_ranges_section
;
199 asection
*dwarf_frame_section
;
200 asection
*dwarf_eh_frame_section
;
202 /* names of the debugging sections */
204 #define INFO_SECTION ".debug_info"
205 #define ABBREV_SECTION ".debug_abbrev"
206 #define LINE_SECTION ".debug_line"
207 #define PUBNAMES_SECTION ".debug_pubnames"
208 #define ARANGES_SECTION ".debug_aranges"
209 #define LOC_SECTION ".debug_loc"
210 #define MACINFO_SECTION ".debug_macinfo"
211 #define STR_SECTION ".debug_str"
212 #define RANGES_SECTION ".debug_ranges"
213 #define FRAME_SECTION ".debug_frame"
214 #define EH_FRAME_SECTION ".eh_frame"
216 /* local data types */
218 /* We hold several abbreviation tables in memory at the same time. */
219 #ifndef ABBREV_HASH_SIZE
220 #define ABBREV_HASH_SIZE 121
223 /* The data in a compilation unit header, after target2host
224 translation, looks like this. */
225 struct comp_unit_head
227 unsigned long length
;
229 unsigned int abbrev_offset
;
230 unsigned char addr_size
;
231 unsigned char signed_addr_p
;
233 /* Size of file offsets; either 4 or 8. */
234 unsigned int offset_size
;
236 /* Size of the length field; either 4 or 12. */
237 unsigned int initial_length_size
;
239 /* Offset to the first byte of this compilation unit header in the
240 .debug_info section, for resolving relative reference dies. */
243 /* Pointer to this compilation unit header in the .debug_info
245 gdb_byte
*cu_head_ptr
;
247 /* Pointer to the first die of this compilation unit. This will be
248 the first byte following the compilation unit header. */
249 gdb_byte
*first_die_ptr
;
251 /* Pointer to the next compilation unit header in the program. */
252 struct comp_unit_head
*next
;
254 /* Base address of this compilation unit. */
255 CORE_ADDR base_address
;
257 /* Non-zero if base_address has been set. */
261 /* Fixed size for the DIE hash table. */
262 #ifndef REF_HASH_SIZE
263 #define REF_HASH_SIZE 1021
266 /* Internal state when decoding a particular compilation unit. */
269 /* The objfile containing this compilation unit. */
270 struct objfile
*objfile
;
272 /* The header of the compilation unit.
274 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
275 should logically be moved to the dwarf2_cu structure. */
276 struct comp_unit_head header
;
278 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
280 /* The language we are debugging. */
281 enum language language
;
282 const struct language_defn
*language_defn
;
284 const char *producer
;
286 /* The generic symbol table building routines have separate lists for
287 file scope symbols and all all other scopes (local scopes). So
288 we need to select the right one to pass to add_symbol_to_list().
289 We do it by keeping a pointer to the correct list in list_in_scope.
291 FIXME: The original dwarf code just treated the file scope as the
292 first local scope, and all other local scopes as nested local
293 scopes, and worked fine. Check to see if we really need to
294 distinguish these in buildsym.c. */
295 struct pending
**list_in_scope
;
297 /* Maintain an array of referenced fundamental types for the current
298 compilation unit being read. For DWARF version 1, we have to construct
299 the fundamental types on the fly, since no information about the
300 fundamental types is supplied. Each such fundamental type is created by
301 calling a language dependent routine to create the type, and then a
302 pointer to that type is then placed in the array at the index specified
303 by it's FT_<TYPENAME> value. The array has a fixed size set by the
304 FT_NUM_MEMBERS compile time constant, which is the number of predefined
305 fundamental types gdb knows how to construct. */
306 struct type
*ftypes
[FT_NUM_MEMBERS
]; /* Fundamental types */
308 /* DWARF abbreviation table associated with this compilation unit. */
309 struct abbrev_info
**dwarf2_abbrevs
;
311 /* Storage for the abbrev table. */
312 struct obstack abbrev_obstack
;
314 /* Hash table holding all the loaded partial DIEs. */
317 /* Storage for things with the same lifetime as this read-in compilation
318 unit, including partial DIEs. */
319 struct obstack comp_unit_obstack
;
321 /* When multiple dwarf2_cu structures are living in memory, this field
322 chains them all together, so that they can be released efficiently.
323 We will probably also want a generation counter so that most-recently-used
324 compilation units are cached... */
325 struct dwarf2_per_cu_data
*read_in_chain
;
327 /* Backchain to our per_cu entry if the tree has been built. */
328 struct dwarf2_per_cu_data
*per_cu
;
330 /* How many compilation units ago was this CU last referenced? */
333 /* A hash table of die offsets for following references. */
334 struct die_info
*die_ref_table
[REF_HASH_SIZE
];
336 /* Full DIEs if read in. */
337 struct die_info
*dies
;
339 /* A set of pointers to dwarf2_per_cu_data objects for compilation
340 units referenced by this one. Only set during full symbol processing;
341 partial symbol tables do not have dependencies. */
344 /* Header data from the line table, during full symbol processing. */
345 struct line_header
*line_header
;
347 /* Mark used when releasing cached dies. */
348 unsigned int mark
: 1;
350 /* This flag will be set if this compilation unit might include
351 inter-compilation-unit references. */
352 unsigned int has_form_ref_addr
: 1;
354 /* This flag will be set if this compilation unit includes any
355 DW_TAG_namespace DIEs. If we know that there are explicit
356 DIEs for namespaces, we don't need to try to infer them
357 from mangled names. */
358 unsigned int has_namespace_info
: 1;
361 /* Persistent data held for a compilation unit, even when not
362 processing it. We put a pointer to this structure in the
363 read_symtab_private field of the psymtab. If we encounter
364 inter-compilation-unit references, we also maintain a sorted
365 list of all compilation units. */
367 struct dwarf2_per_cu_data
369 /* The start offset and length of this compilation unit. 2**30-1
370 bytes should suffice to store the length of any compilation unit
371 - if it doesn't, GDB will fall over anyway. */
372 unsigned long offset
;
373 unsigned long length
: 30;
375 /* Flag indicating this compilation unit will be read in before
376 any of the current compilation units are processed. */
377 unsigned long queued
: 1;
379 /* This flag will be set if we need to load absolutely all DIEs
380 for this compilation unit, instead of just the ones we think
381 are interesting. It gets set if we look for a DIE in the
382 hash table and don't find it. */
383 unsigned int load_all_dies
: 1;
385 /* Set iff currently read in. */
386 struct dwarf2_cu
*cu
;
388 /* If full symbols for this CU have been read in, then this field
389 holds a map of DIE offsets to types. It isn't always possible
390 to reconstruct this information later, so we have to preserve
394 /* The partial symbol table associated with this compilation unit,
395 or NULL for partial units (which do not have an associated
397 struct partial_symtab
*psymtab
;
400 /* The line number information for a compilation unit (found in the
401 .debug_line section) begins with a "statement program header",
402 which contains the following information. */
405 unsigned int total_length
;
406 unsigned short version
;
407 unsigned int header_length
;
408 unsigned char minimum_instruction_length
;
409 unsigned char default_is_stmt
;
411 unsigned char line_range
;
412 unsigned char opcode_base
;
414 /* standard_opcode_lengths[i] is the number of operands for the
415 standard opcode whose value is i. This means that
416 standard_opcode_lengths[0] is unused, and the last meaningful
417 element is standard_opcode_lengths[opcode_base - 1]. */
418 unsigned char *standard_opcode_lengths
;
420 /* The include_directories table. NOTE! These strings are not
421 allocated with xmalloc; instead, they are pointers into
422 debug_line_buffer. If you try to free them, `free' will get
424 unsigned int num_include_dirs
, include_dirs_size
;
427 /* The file_names table. NOTE! These strings are not allocated
428 with xmalloc; instead, they are pointers into debug_line_buffer.
429 Don't try to free them directly. */
430 unsigned int num_file_names
, file_names_size
;
434 unsigned int dir_index
;
435 unsigned int mod_time
;
437 int included_p
; /* Non-zero if referenced by the Line Number Program. */
438 struct symtab
*symtab
; /* The associated symbol table, if any. */
441 /* The start and end of the statement program following this
442 header. These point into dwarf2_per_objfile->line_buffer. */
443 gdb_byte
*statement_program_start
, *statement_program_end
;
446 /* When we construct a partial symbol table entry we only
447 need this much information. */
448 struct partial_die_info
450 /* Offset of this DIE. */
453 /* DWARF-2 tag for this DIE. */
454 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
456 /* Language code associated with this DIE. This is only used
457 for the compilation unit DIE. */
458 unsigned int language
: 8;
460 /* Assorted flags describing the data found in this DIE. */
461 unsigned int has_children
: 1;
462 unsigned int is_external
: 1;
463 unsigned int is_declaration
: 1;
464 unsigned int has_type
: 1;
465 unsigned int has_specification
: 1;
466 unsigned int has_stmt_list
: 1;
467 unsigned int has_pc_info
: 1;
469 /* Flag set if the SCOPE field of this structure has been
471 unsigned int scope_set
: 1;
473 /* Flag set if the DIE has a byte_size attribute. */
474 unsigned int has_byte_size
: 1;
476 /* The name of this DIE. Normally the value of DW_AT_name, but
477 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
482 /* The scope to prepend to our children. This is generally
483 allocated on the comp_unit_obstack, so will disappear
484 when this compilation unit leaves the cache. */
487 /* The location description associated with this DIE, if any. */
488 struct dwarf_block
*locdesc
;
490 /* If HAS_PC_INFO, the PC range associated with this DIE. */
494 /* Pointer into the info_buffer pointing at the target of
495 DW_AT_sibling, if any. */
498 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
499 DW_AT_specification (or DW_AT_abstract_origin or
501 unsigned int spec_offset
;
503 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
504 unsigned int line_offset
;
506 /* Pointers to this DIE's parent, first child, and next sibling,
508 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
511 /* This data structure holds the information of an abbrev. */
514 unsigned int number
; /* number identifying abbrev */
515 enum dwarf_tag tag
; /* dwarf tag */
516 unsigned short has_children
; /* boolean */
517 unsigned short num_attrs
; /* number of attributes */
518 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
519 struct abbrev_info
*next
; /* next in chain */
524 enum dwarf_attribute name
;
525 enum dwarf_form form
;
528 /* This data structure holds a complete die structure. */
531 enum dwarf_tag tag
; /* Tag indicating type of die */
532 unsigned int abbrev
; /* Abbrev number */
533 unsigned int offset
; /* Offset in .debug_info section */
534 unsigned int num_attrs
; /* Number of attributes */
535 struct attribute
*attrs
; /* An array of attributes */
536 struct die_info
*next_ref
; /* Next die in ref hash table */
538 /* The dies in a compilation unit form an n-ary tree. PARENT
539 points to this die's parent; CHILD points to the first child of
540 this node; and all the children of a given node are chained
541 together via their SIBLING fields, terminated by a die whose
543 struct die_info
*child
; /* Its first child, if any. */
544 struct die_info
*sibling
; /* Its next sibling, if any. */
545 struct die_info
*parent
; /* Its parent, if any. */
547 struct type
*type
; /* Cached type information */
550 /* Attributes have a name and a value */
553 enum dwarf_attribute name
;
554 enum dwarf_form form
;
558 struct dwarf_block
*blk
;
566 struct function_range
569 CORE_ADDR lowpc
, highpc
;
571 struct function_range
*next
;
574 /* Get at parts of an attribute structure */
576 #define DW_STRING(attr) ((attr)->u.str)
577 #define DW_UNSND(attr) ((attr)->u.unsnd)
578 #define DW_BLOCK(attr) ((attr)->u.blk)
579 #define DW_SND(attr) ((attr)->u.snd)
580 #define DW_ADDR(attr) ((attr)->u.addr)
582 /* Blocks are a bunch of untyped bytes. */
589 #ifndef ATTR_ALLOC_CHUNK
590 #define ATTR_ALLOC_CHUNK 4
593 /* Allocate fields for structs, unions and enums in this size. */
594 #ifndef DW_FIELD_ALLOC_CHUNK
595 #define DW_FIELD_ALLOC_CHUNK 4
598 /* A zeroed version of a partial die for initialization purposes. */
599 static struct partial_die_info zeroed_partial_die
;
601 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
602 but this would require a corresponding change in unpack_field_as_long
604 static int bits_per_byte
= 8;
606 /* The routines that read and process dies for a C struct or C++ class
607 pass lists of data member fields and lists of member function fields
608 in an instance of a field_info structure, as defined below. */
611 /* List of data member and baseclasses fields. */
614 struct nextfield
*next
;
621 /* Number of fields. */
624 /* Number of baseclasses. */
627 /* Set if the accesibility of one of the fields is not public. */
628 int non_public_fields
;
630 /* Member function fields array, entries are allocated in the order they
631 are encountered in the object file. */
634 struct nextfnfield
*next
;
635 struct fn_field fnfield
;
639 /* Member function fieldlist array, contains name of possibly overloaded
640 member function, number of overloaded member functions and a pointer
641 to the head of the member function field chain. */
646 struct nextfnfield
*head
;
650 /* Number of entries in the fnfieldlists array. */
654 /* One item on the queue of compilation units to read in full symbols
656 struct dwarf2_queue_item
658 struct dwarf2_per_cu_data
*per_cu
;
659 struct dwarf2_queue_item
*next
;
662 /* The current queue. */
663 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
665 /* Loaded secondary compilation units are kept in memory until they
666 have not been referenced for the processing of this many
667 compilation units. Set this to zero to disable caching. Cache
668 sizes of up to at least twenty will improve startup time for
669 typical inter-CU-reference binaries, at an obvious memory cost. */
670 static int dwarf2_max_cache_age
= 5;
672 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
673 struct cmd_list_element
*c
, const char *value
)
675 fprintf_filtered (file
, _("\
676 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
681 /* Various complaints about symbol reading that don't abort the process */
684 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
686 complaint (&symfile_complaints
,
687 _("statement list doesn't fit in .debug_line section"));
691 dwarf2_debug_line_missing_file_complaint (void)
693 complaint (&symfile_complaints
,
694 _(".debug_line section has line data without a file"));
698 dwarf2_complex_location_expr_complaint (void)
700 complaint (&symfile_complaints
, _("location expression too complex"));
704 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
707 complaint (&symfile_complaints
,
708 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
713 dwarf2_macros_too_long_complaint (void)
715 complaint (&symfile_complaints
,
716 _("macro info runs off end of `.debug_macinfo' section"));
720 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
722 complaint (&symfile_complaints
,
723 _("macro debug info contains a malformed macro definition:\n`%s'"),
728 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
730 complaint (&symfile_complaints
,
731 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
734 /* local function prototypes */
736 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
739 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
742 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
745 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
746 struct partial_die_info
*,
747 struct partial_symtab
*);
749 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
751 static void scan_partial_symbols (struct partial_die_info
*,
752 CORE_ADDR
*, CORE_ADDR
*,
755 static void add_partial_symbol (struct partial_die_info
*,
758 static int pdi_needs_namespace (enum dwarf_tag tag
);
760 static void add_partial_namespace (struct partial_die_info
*pdi
,
761 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
762 struct dwarf2_cu
*cu
);
764 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
765 struct dwarf2_cu
*cu
);
767 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
770 struct dwarf2_cu
*cu
);
772 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
774 static void psymtab_to_symtab_1 (struct partial_symtab
*);
776 gdb_byte
*dwarf2_read_section (struct objfile
*, asection
*);
778 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
780 static void dwarf2_free_abbrev_table (void *);
782 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
785 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
788 static struct partial_die_info
*load_partial_dies (bfd
*, gdb_byte
*, int,
791 static gdb_byte
*read_partial_die (struct partial_die_info
*,
792 struct abbrev_info
*abbrev
, unsigned int,
793 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
795 static struct partial_die_info
*find_partial_die (unsigned long,
798 static void fixup_partial_die (struct partial_die_info
*,
801 static gdb_byte
*read_full_die (struct die_info
**, bfd
*, gdb_byte
*,
802 struct dwarf2_cu
*, int *);
804 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
805 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
807 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
808 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
810 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
812 static int read_1_signed_byte (bfd
*, gdb_byte
*);
814 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
816 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
818 static unsigned long read_8_bytes (bfd
*, gdb_byte
*);
820 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
823 static LONGEST
read_initial_length (bfd
*, gdb_byte
*,
824 struct comp_unit_head
*, unsigned int *);
826 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
829 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
831 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
833 static char *read_indirect_string (bfd
*, gdb_byte
*,
834 const struct comp_unit_head
*,
837 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
839 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
841 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
843 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
845 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
848 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
849 struct dwarf2_cu
*cu
);
851 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
853 static struct die_info
*die_specification (struct die_info
*die
,
856 static void free_line_header (struct line_header
*lh
);
858 static void add_file_name (struct line_header
*, char *, unsigned int,
859 unsigned int, unsigned int);
861 static struct line_header
*(dwarf_decode_line_header
862 (unsigned int offset
,
863 bfd
*abfd
, struct dwarf2_cu
*cu
));
865 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
866 struct dwarf2_cu
*, struct partial_symtab
*);
868 static void dwarf2_start_subfile (char *, char *, char *);
870 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
873 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
876 static void dwarf2_const_value_data (struct attribute
*attr
,
880 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
882 static struct type
*die_containing_type (struct die_info
*,
885 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
887 static void read_type_die (struct die_info
*, struct dwarf2_cu
*);
889 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
891 static char *typename_concat (struct obstack
*,
896 static void read_typedef (struct die_info
*, struct dwarf2_cu
*);
898 static void read_base_type (struct die_info
*, struct dwarf2_cu
*);
900 static void read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
902 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
904 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
906 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
908 static int dwarf2_get_pc_bounds (struct die_info
*,
909 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*);
911 static void get_scope_pc_bounds (struct die_info
*,
912 CORE_ADDR
*, CORE_ADDR
*,
915 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
918 static void dwarf2_attach_fields_to_type (struct field_info
*,
919 struct type
*, struct dwarf2_cu
*);
921 static void dwarf2_add_member_fn (struct field_info
*,
922 struct die_info
*, struct type
*,
925 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
926 struct type
*, struct dwarf2_cu
*);
928 static void read_structure_type (struct die_info
*, struct dwarf2_cu
*);
930 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
932 static char *determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
934 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
936 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
938 static const char *namespace_name (struct die_info
*die
,
939 int *is_anonymous
, struct dwarf2_cu
*);
941 static void read_enumeration_type (struct die_info
*, struct dwarf2_cu
*);
943 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
945 static struct type
*dwarf_base_type (int, int, struct dwarf2_cu
*);
947 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
949 static void read_array_type (struct die_info
*, struct dwarf2_cu
*);
951 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
954 static void read_tag_pointer_type (struct die_info
*, struct dwarf2_cu
*);
956 static void read_tag_ptr_to_member_type (struct die_info
*,
959 static void read_tag_reference_type (struct die_info
*, struct dwarf2_cu
*);
961 static void read_tag_const_type (struct die_info
*, struct dwarf2_cu
*);
963 static void read_tag_volatile_type (struct die_info
*, struct dwarf2_cu
*);
965 static void read_tag_string_type (struct die_info
*, struct dwarf2_cu
*);
967 static void read_subroutine_type (struct die_info
*, struct dwarf2_cu
*);
969 static struct die_info
*read_comp_unit (gdb_byte
*, bfd
*, struct dwarf2_cu
*);
971 static struct die_info
*read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
973 gdb_byte
**new_info_ptr
,
974 struct die_info
*parent
);
976 static struct die_info
*read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
978 gdb_byte
**new_info_ptr
,
979 struct die_info
*parent
);
981 static void free_die_list (struct die_info
*);
983 static void process_die (struct die_info
*, struct dwarf2_cu
*);
985 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
987 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
989 static struct die_info
*dwarf2_extension (struct die_info
*die
,
992 static char *dwarf_tag_name (unsigned int);
994 static char *dwarf_attr_name (unsigned int);
996 static char *dwarf_form_name (unsigned int);
998 static char *dwarf_stack_op_name (unsigned int);
1000 static char *dwarf_bool_name (unsigned int);
1002 static char *dwarf_type_encoding_name (unsigned int);
1005 static char *dwarf_cfi_name (unsigned int);
1007 struct die_info
*copy_die (struct die_info
*);
1010 static struct die_info
*sibling_die (struct die_info
*);
1012 static void dump_die (struct die_info
*);
1014 static void dump_die_list (struct die_info
*);
1016 static void store_in_ref_table (unsigned int, struct die_info
*,
1017 struct dwarf2_cu
*);
1019 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*,
1020 struct dwarf2_cu
*);
1022 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1024 static struct die_info
*follow_die_ref (struct die_info
*,
1026 struct dwarf2_cu
*);
1028 static struct type
*dwarf2_fundamental_type (struct objfile
*, int,
1029 struct dwarf2_cu
*);
1031 /* memory allocation interface */
1033 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1035 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1037 static struct die_info
*dwarf_alloc_die (void);
1039 static void initialize_cu_func_list (struct dwarf2_cu
*);
1041 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1042 struct dwarf2_cu
*);
1044 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1045 char *, bfd
*, struct dwarf2_cu
*);
1047 static int attr_form_is_block (struct attribute
*);
1049 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1051 struct dwarf2_cu
*cu
);
1053 static gdb_byte
*skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
1054 struct dwarf2_cu
*cu
);
1056 static void free_stack_comp_unit (void *);
1058 static hashval_t
partial_die_hash (const void *item
);
1060 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1062 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1063 (unsigned long offset
, struct objfile
*objfile
);
1065 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1066 (unsigned long offset
, struct objfile
*objfile
);
1068 static void free_one_comp_unit (void *);
1070 static void free_cached_comp_units (void *);
1072 static void age_cached_comp_units (void);
1074 static void free_one_cached_comp_unit (void *);
1076 static void set_die_type (struct die_info
*, struct type
*,
1077 struct dwarf2_cu
*);
1079 static void reset_die_and_siblings_types (struct die_info
*,
1080 struct dwarf2_cu
*);
1082 static void create_all_comp_units (struct objfile
*);
1084 static struct dwarf2_cu
*load_full_comp_unit (struct dwarf2_per_cu_data
*,
1087 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1089 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1090 struct dwarf2_per_cu_data
*);
1092 static void dwarf2_mark (struct dwarf2_cu
*);
1094 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1096 static void read_set_type (struct die_info
*, struct dwarf2_cu
*);
1099 /* Try to locate the sections we need for DWARF 2 debugging
1100 information and return true if we have enough to do something. */
1103 dwarf2_has_info (struct objfile
*objfile
)
1105 struct dwarf2_per_objfile
*data
;
1107 /* Initialize per-objfile state. */
1108 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1109 memset (data
, 0, sizeof (*data
));
1110 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1111 dwarf2_per_objfile
= data
;
1113 dwarf_info_section
= 0;
1114 dwarf_abbrev_section
= 0;
1115 dwarf_line_section
= 0;
1116 dwarf_str_section
= 0;
1117 dwarf_macinfo_section
= 0;
1118 dwarf_frame_section
= 0;
1119 dwarf_eh_frame_section
= 0;
1120 dwarf_ranges_section
= 0;
1121 dwarf_loc_section
= 0;
1123 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1124 return (dwarf_info_section
!= NULL
&& dwarf_abbrev_section
!= NULL
);
1127 /* This function is mapped across the sections and remembers the
1128 offset and size of each of the debugging sections we are interested
1132 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1134 if (strcmp (sectp
->name
, INFO_SECTION
) == 0)
1136 dwarf2_per_objfile
->info_size
= bfd_get_section_size (sectp
);
1137 dwarf_info_section
= sectp
;
1139 else if (strcmp (sectp
->name
, ABBREV_SECTION
) == 0)
1141 dwarf2_per_objfile
->abbrev_size
= bfd_get_section_size (sectp
);
1142 dwarf_abbrev_section
= sectp
;
1144 else if (strcmp (sectp
->name
, LINE_SECTION
) == 0)
1146 dwarf2_per_objfile
->line_size
= bfd_get_section_size (sectp
);
1147 dwarf_line_section
= sectp
;
1149 else if (strcmp (sectp
->name
, PUBNAMES_SECTION
) == 0)
1151 dwarf2_per_objfile
->pubnames_size
= bfd_get_section_size (sectp
);
1152 dwarf_pubnames_section
= sectp
;
1154 else if (strcmp (sectp
->name
, ARANGES_SECTION
) == 0)
1156 dwarf2_per_objfile
->aranges_size
= bfd_get_section_size (sectp
);
1157 dwarf_aranges_section
= sectp
;
1159 else if (strcmp (sectp
->name
, LOC_SECTION
) == 0)
1161 dwarf2_per_objfile
->loc_size
= bfd_get_section_size (sectp
);
1162 dwarf_loc_section
= sectp
;
1164 else if (strcmp (sectp
->name
, MACINFO_SECTION
) == 0)
1166 dwarf2_per_objfile
->macinfo_size
= bfd_get_section_size (sectp
);
1167 dwarf_macinfo_section
= sectp
;
1169 else if (strcmp (sectp
->name
, STR_SECTION
) == 0)
1171 dwarf2_per_objfile
->str_size
= bfd_get_section_size (sectp
);
1172 dwarf_str_section
= sectp
;
1174 else if (strcmp (sectp
->name
, FRAME_SECTION
) == 0)
1176 dwarf2_per_objfile
->frame_size
= bfd_get_section_size (sectp
);
1177 dwarf_frame_section
= sectp
;
1179 else if (strcmp (sectp
->name
, EH_FRAME_SECTION
) == 0)
1181 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1182 if (aflag
& SEC_HAS_CONTENTS
)
1184 dwarf2_per_objfile
->eh_frame_size
= bfd_get_section_size (sectp
);
1185 dwarf_eh_frame_section
= sectp
;
1188 else if (strcmp (sectp
->name
, RANGES_SECTION
) == 0)
1190 dwarf2_per_objfile
->ranges_size
= bfd_get_section_size (sectp
);
1191 dwarf_ranges_section
= sectp
;
1194 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1195 && bfd_section_vma (abfd
, sectp
) == 0)
1196 dwarf2_per_objfile
->has_section_at_zero
= 1;
1199 /* Build a partial symbol table. */
1202 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1204 /* We definitely need the .debug_info and .debug_abbrev sections */
1206 dwarf2_per_objfile
->info_buffer
= dwarf2_read_section (objfile
, dwarf_info_section
);
1207 dwarf2_per_objfile
->abbrev_buffer
= dwarf2_read_section (objfile
, dwarf_abbrev_section
);
1209 if (dwarf_line_section
)
1210 dwarf2_per_objfile
->line_buffer
= dwarf2_read_section (objfile
, dwarf_line_section
);
1212 dwarf2_per_objfile
->line_buffer
= NULL
;
1214 if (dwarf_str_section
)
1215 dwarf2_per_objfile
->str_buffer
= dwarf2_read_section (objfile
, dwarf_str_section
);
1217 dwarf2_per_objfile
->str_buffer
= NULL
;
1219 if (dwarf_macinfo_section
)
1220 dwarf2_per_objfile
->macinfo_buffer
= dwarf2_read_section (objfile
,
1221 dwarf_macinfo_section
);
1223 dwarf2_per_objfile
->macinfo_buffer
= NULL
;
1225 if (dwarf_ranges_section
)
1226 dwarf2_per_objfile
->ranges_buffer
= dwarf2_read_section (objfile
, dwarf_ranges_section
);
1228 dwarf2_per_objfile
->ranges_buffer
= NULL
;
1230 if (dwarf_loc_section
)
1231 dwarf2_per_objfile
->loc_buffer
= dwarf2_read_section (objfile
, dwarf_loc_section
);
1233 dwarf2_per_objfile
->loc_buffer
= NULL
;
1236 || (objfile
->global_psymbols
.size
== 0
1237 && objfile
->static_psymbols
.size
== 0))
1239 init_psymbol_list (objfile
, 1024);
1243 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1245 /* Things are significantly easier if we have .debug_aranges and
1246 .debug_pubnames sections */
1248 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1252 /* only test this case for now */
1254 /* In this case we have to work a bit harder */
1255 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1260 /* Build the partial symbol table from the information in the
1261 .debug_pubnames and .debug_aranges sections. */
1264 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1266 bfd
*abfd
= objfile
->obfd
;
1267 char *aranges_buffer
, *pubnames_buffer
;
1268 char *aranges_ptr
, *pubnames_ptr
;
1269 unsigned int entry_length
, version
, info_offset
, info_size
;
1271 pubnames_buffer
= dwarf2_read_section (objfile
,
1272 dwarf_pubnames_section
);
1273 pubnames_ptr
= pubnames_buffer
;
1274 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames_size
)
1276 struct comp_unit_head cu_header
;
1277 unsigned int bytes_read
;
1279 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
1281 pubnames_ptr
+= bytes_read
;
1282 version
= read_1_byte (abfd
, pubnames_ptr
);
1284 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1286 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1290 aranges_buffer
= dwarf2_read_section (objfile
,
1291 dwarf_aranges_section
);
1296 /* Read in the comp unit header information from the debug_info at
1300 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1301 gdb_byte
*info_ptr
, bfd
*abfd
)
1304 unsigned int bytes_read
;
1305 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
1307 info_ptr
+= bytes_read
;
1308 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1310 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1312 info_ptr
+= bytes_read
;
1313 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1315 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1316 if (signed_addr
< 0)
1317 internal_error (__FILE__
, __LINE__
,
1318 _("read_comp_unit_head: dwarf from non elf file"));
1319 cu_header
->signed_addr_p
= signed_addr
;
1324 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1327 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1329 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1331 if (header
->version
!= 2 && header
->version
!= 3)
1332 error (_("Dwarf Error: wrong version in compilation unit header "
1333 "(is %d, should be %d) [in module %s]"), header
->version
,
1334 2, bfd_get_filename (abfd
));
1336 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev_size
)
1337 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1338 "(offset 0x%lx + 6) [in module %s]"),
1339 (long) header
->abbrev_offset
,
1340 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1341 bfd_get_filename (abfd
));
1343 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1344 > dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1345 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1346 "(offset 0x%lx + 0) [in module %s]"),
1347 (long) header
->length
,
1348 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1349 bfd_get_filename (abfd
));
1354 /* Allocate a new partial symtab for file named NAME and mark this new
1355 partial symtab as being an include of PST. */
1358 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1359 struct objfile
*objfile
)
1361 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1363 subpst
->section_offsets
= pst
->section_offsets
;
1364 subpst
->textlow
= 0;
1365 subpst
->texthigh
= 0;
1367 subpst
->dependencies
= (struct partial_symtab
**)
1368 obstack_alloc (&objfile
->objfile_obstack
,
1369 sizeof (struct partial_symtab
*));
1370 subpst
->dependencies
[0] = pst
;
1371 subpst
->number_of_dependencies
= 1;
1373 subpst
->globals_offset
= 0;
1374 subpst
->n_global_syms
= 0;
1375 subpst
->statics_offset
= 0;
1376 subpst
->n_static_syms
= 0;
1377 subpst
->symtab
= NULL
;
1378 subpst
->read_symtab
= pst
->read_symtab
;
1381 /* No private part is necessary for include psymtabs. This property
1382 can be used to differentiate between such include psymtabs and
1383 the regular ones. */
1384 subpst
->read_symtab_private
= NULL
;
1387 /* Read the Line Number Program data and extract the list of files
1388 included by the source file represented by PST. Build an include
1389 partial symtab for each of these included files.
1391 This procedure assumes that there *is* a Line Number Program in
1392 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1393 before calling this procedure. */
1396 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1397 struct partial_die_info
*pdi
,
1398 struct partial_symtab
*pst
)
1400 struct objfile
*objfile
= cu
->objfile
;
1401 bfd
*abfd
= objfile
->obfd
;
1402 struct line_header
*lh
;
1404 lh
= dwarf_decode_line_header (pdi
->line_offset
, abfd
, cu
);
1406 return; /* No linetable, so no includes. */
1408 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1410 free_line_header (lh
);
1414 /* Build the partial symbol table by doing a quick pass through the
1415 .debug_info and .debug_abbrev sections. */
1418 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1420 /* Instead of reading this into a big buffer, we should probably use
1421 mmap() on architectures that support it. (FIXME) */
1422 bfd
*abfd
= objfile
->obfd
;
1424 gdb_byte
*beg_of_comp_unit
;
1425 struct partial_die_info comp_unit_die
;
1426 struct partial_symtab
*pst
;
1427 struct cleanup
*back_to
;
1428 CORE_ADDR lowpc
, highpc
, baseaddr
;
1430 info_ptr
= dwarf2_per_objfile
->info_buffer
;
1432 /* Any cached compilation units will be linked by the per-objfile
1433 read_in_chain. Make sure to free them when we're done. */
1434 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1436 create_all_comp_units (objfile
);
1438 /* Since the objects we're extracting from .debug_info vary in
1439 length, only the individual functions to extract them (like
1440 read_comp_unit_head and load_partial_die) can really know whether
1441 the buffer is large enough to hold another complete object.
1443 At the moment, they don't actually check that. If .debug_info
1444 holds just one extra byte after the last compilation unit's dies,
1445 then read_comp_unit_head will happily read off the end of the
1446 buffer. read_partial_die is similarly casual. Those functions
1449 For this loop condition, simply checking whether there's any data
1450 left at all should be sufficient. */
1451 while (info_ptr
< (dwarf2_per_objfile
->info_buffer
1452 + dwarf2_per_objfile
->info_size
))
1454 struct cleanup
*back_to_inner
;
1455 struct dwarf2_cu cu
;
1456 struct abbrev_info
*abbrev
;
1457 unsigned int bytes_read
;
1458 struct dwarf2_per_cu_data
*this_cu
;
1460 beg_of_comp_unit
= info_ptr
;
1462 memset (&cu
, 0, sizeof (cu
));
1464 obstack_init (&cu
.comp_unit_obstack
);
1466 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1468 cu
.objfile
= objfile
;
1469 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
, abfd
);
1471 /* Complete the cu_header */
1472 cu
.header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1473 cu
.header
.first_die_ptr
= info_ptr
;
1474 cu
.header
.cu_head_ptr
= beg_of_comp_unit
;
1476 cu
.list_in_scope
= &file_symbols
;
1478 /* Read the abbrevs for this compilation unit into a table */
1479 dwarf2_read_abbrevs (abfd
, &cu
);
1480 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1482 this_cu
= dwarf2_find_comp_unit (cu
.header
.offset
, objfile
);
1484 /* Read the compilation unit die */
1485 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, &cu
);
1486 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1487 abfd
, info_ptr
, &cu
);
1489 if (comp_unit_die
.tag
== DW_TAG_partial_unit
)
1491 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1492 + cu
.header
.initial_length_size
);
1493 do_cleanups (back_to_inner
);
1497 /* Set the language we're debugging */
1498 set_cu_language (comp_unit_die
.language
, &cu
);
1500 /* Allocate a new partial symbol table structure */
1501 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1502 comp_unit_die
.name
? comp_unit_die
.name
: "",
1503 comp_unit_die
.lowpc
,
1504 objfile
->global_psymbols
.next
,
1505 objfile
->static_psymbols
.next
);
1507 if (comp_unit_die
.dirname
)
1508 pst
->dirname
= xstrdup (comp_unit_die
.dirname
);
1510 pst
->read_symtab_private
= (char *) this_cu
;
1512 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1514 /* Store the function that reads in the rest of the symbol table */
1515 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1517 /* If this compilation unit was already read in, free the
1518 cached copy in order to read it in again. This is
1519 necessary because we skipped some symbols when we first
1520 read in the compilation unit (see load_partial_dies).
1521 This problem could be avoided, but the benefit is
1523 if (this_cu
->cu
!= NULL
)
1524 free_one_cached_comp_unit (this_cu
->cu
);
1526 cu
.per_cu
= this_cu
;
1528 /* Note that this is a pointer to our stack frame, being
1529 added to a global data structure. It will be cleaned up
1530 in free_stack_comp_unit when we finish with this
1531 compilation unit. */
1534 this_cu
->psymtab
= pst
;
1536 /* Check if comp unit has_children.
1537 If so, read the rest of the partial symbols from this comp unit.
1538 If not, there's no more debug_info for this comp unit. */
1539 if (comp_unit_die
.has_children
)
1541 struct partial_die_info
*first_die
;
1543 lowpc
= ((CORE_ADDR
) -1);
1544 highpc
= ((CORE_ADDR
) 0);
1546 first_die
= load_partial_dies (abfd
, info_ptr
, 1, &cu
);
1548 scan_partial_symbols (first_die
, &lowpc
, &highpc
, &cu
);
1550 /* If we didn't find a lowpc, set it to highpc to avoid
1551 complaints from `maint check'. */
1552 if (lowpc
== ((CORE_ADDR
) -1))
1555 /* If the compilation unit didn't have an explicit address range,
1556 then use the information extracted from its child dies. */
1557 if (! comp_unit_die
.has_pc_info
)
1559 comp_unit_die
.lowpc
= lowpc
;
1560 comp_unit_die
.highpc
= highpc
;
1563 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1564 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1566 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1567 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1568 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1569 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1570 sort_pst_symbols (pst
);
1572 /* If there is already a psymtab or symtab for a file of this
1573 name, remove it. (If there is a symtab, more drastic things
1574 also happen.) This happens in VxWorks. */
1575 free_named_symtabs (pst
->filename
);
1577 info_ptr
= beg_of_comp_unit
+ cu
.header
.length
1578 + cu
.header
.initial_length_size
;
1580 if (comp_unit_die
.has_stmt_list
)
1582 /* Get the list of files included in the current compilation unit,
1583 and build a psymtab for each of them. */
1584 dwarf2_build_include_psymtabs (&cu
, &comp_unit_die
, pst
);
1587 do_cleanups (back_to_inner
);
1589 do_cleanups (back_to
);
1592 /* Load the DIEs for a secondary CU into memory. */
1595 load_comp_unit (struct dwarf2_per_cu_data
*this_cu
, struct objfile
*objfile
)
1597 bfd
*abfd
= objfile
->obfd
;
1598 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
1599 struct partial_die_info comp_unit_die
;
1600 struct dwarf2_cu
*cu
;
1601 struct abbrev_info
*abbrev
;
1602 unsigned int bytes_read
;
1603 struct cleanup
*back_to
;
1605 info_ptr
= dwarf2_per_objfile
->info_buffer
+ this_cu
->offset
;
1606 beg_of_comp_unit
= info_ptr
;
1608 cu
= xmalloc (sizeof (struct dwarf2_cu
));
1609 memset (cu
, 0, sizeof (struct dwarf2_cu
));
1611 obstack_init (&cu
->comp_unit_obstack
);
1613 cu
->objfile
= objfile
;
1614 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
1616 /* Complete the cu_header. */
1617 cu
->header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1618 cu
->header
.first_die_ptr
= info_ptr
;
1619 cu
->header
.cu_head_ptr
= beg_of_comp_unit
;
1621 /* Read the abbrevs for this compilation unit into a table. */
1622 dwarf2_read_abbrevs (abfd
, cu
);
1623 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
1625 /* Read the compilation unit die. */
1626 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
1627 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1628 abfd
, info_ptr
, cu
);
1630 /* Set the language we're debugging. */
1631 set_cu_language (comp_unit_die
.language
, cu
);
1633 /* Link this compilation unit into the compilation unit tree. */
1635 cu
->per_cu
= this_cu
;
1637 /* Check if comp unit has_children.
1638 If so, read the rest of the partial symbols from this comp unit.
1639 If not, there's no more debug_info for this comp unit. */
1640 if (comp_unit_die
.has_children
)
1641 load_partial_dies (abfd
, info_ptr
, 0, cu
);
1643 do_cleanups (back_to
);
1646 /* Create a list of all compilation units in OBJFILE. We do this only
1647 if an inter-comp-unit reference is found; presumably if there is one,
1648 there will be many, and one will occur early in the .debug_info section.
1649 So there's no point in building this list incrementally. */
1652 create_all_comp_units (struct objfile
*objfile
)
1656 struct dwarf2_per_cu_data
**all_comp_units
;
1657 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info_buffer
;
1661 all_comp_units
= xmalloc (n_allocated
1662 * sizeof (struct dwarf2_per_cu_data
*));
1664 while (info_ptr
< dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1666 struct comp_unit_head cu_header
;
1667 gdb_byte
*beg_of_comp_unit
;
1668 struct dwarf2_per_cu_data
*this_cu
;
1669 unsigned long offset
;
1670 unsigned int bytes_read
;
1672 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
1674 /* Read just enough information to find out where the next
1675 compilation unit is. */
1676 cu_header
.initial_length_size
= 0;
1677 cu_header
.length
= read_initial_length (objfile
->obfd
, info_ptr
,
1678 &cu_header
, &bytes_read
);
1680 /* Save the compilation unit for later lookup. */
1681 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
1682 sizeof (struct dwarf2_per_cu_data
));
1683 memset (this_cu
, 0, sizeof (*this_cu
));
1684 this_cu
->offset
= offset
;
1685 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
1687 if (n_comp_units
== n_allocated
)
1690 all_comp_units
= xrealloc (all_comp_units
,
1692 * sizeof (struct dwarf2_per_cu_data
*));
1694 all_comp_units
[n_comp_units
++] = this_cu
;
1696 info_ptr
= info_ptr
+ this_cu
->length
;
1699 dwarf2_per_objfile
->all_comp_units
1700 = obstack_alloc (&objfile
->objfile_obstack
,
1701 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1702 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
1703 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1704 xfree (all_comp_units
);
1705 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
1708 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1709 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1713 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
1714 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
1716 struct objfile
*objfile
= cu
->objfile
;
1717 bfd
*abfd
= objfile
->obfd
;
1718 struct partial_die_info
*pdi
;
1720 /* Now, march along the PDI's, descending into ones which have
1721 interesting children but skipping the children of the other ones,
1722 until we reach the end of the compilation unit. */
1728 fixup_partial_die (pdi
, cu
);
1730 /* Anonymous namespaces have no name but have interesting
1731 children, so we need to look at them. Ditto for anonymous
1734 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
1735 || pdi
->tag
== DW_TAG_enumeration_type
)
1739 case DW_TAG_subprogram
:
1740 if (pdi
->has_pc_info
)
1742 if (pdi
->lowpc
< *lowpc
)
1744 *lowpc
= pdi
->lowpc
;
1746 if (pdi
->highpc
> *highpc
)
1748 *highpc
= pdi
->highpc
;
1750 if (!pdi
->is_declaration
)
1752 add_partial_symbol (pdi
, cu
);
1756 case DW_TAG_variable
:
1757 case DW_TAG_typedef
:
1758 case DW_TAG_union_type
:
1759 if (!pdi
->is_declaration
)
1761 add_partial_symbol (pdi
, cu
);
1764 case DW_TAG_class_type
:
1765 case DW_TAG_structure_type
:
1766 if (!pdi
->is_declaration
)
1768 add_partial_symbol (pdi
, cu
);
1771 case DW_TAG_enumeration_type
:
1772 if (!pdi
->is_declaration
)
1773 add_partial_enumeration (pdi
, cu
);
1775 case DW_TAG_base_type
:
1776 case DW_TAG_subrange_type
:
1777 /* File scope base type definitions are added to the partial
1779 add_partial_symbol (pdi
, cu
);
1781 case DW_TAG_namespace
:
1782 add_partial_namespace (pdi
, lowpc
, highpc
, cu
);
1789 /* If the die has a sibling, skip to the sibling. */
1791 pdi
= pdi
->die_sibling
;
1795 /* Functions used to compute the fully scoped name of a partial DIE.
1797 Normally, this is simple. For C++, the parent DIE's fully scoped
1798 name is concatenated with "::" and the partial DIE's name. For
1799 Java, the same thing occurs except that "." is used instead of "::".
1800 Enumerators are an exception; they use the scope of their parent
1801 enumeration type, i.e. the name of the enumeration type is not
1802 prepended to the enumerator.
1804 There are two complexities. One is DW_AT_specification; in this
1805 case "parent" means the parent of the target of the specification,
1806 instead of the direct parent of the DIE. The other is compilers
1807 which do not emit DW_TAG_namespace; in this case we try to guess
1808 the fully qualified name of structure types from their members'
1809 linkage names. This must be done using the DIE's children rather
1810 than the children of any DW_AT_specification target. We only need
1811 to do this for structures at the top level, i.e. if the target of
1812 any DW_AT_specification (if any; otherwise the DIE itself) does not
1815 /* Compute the scope prefix associated with PDI's parent, in
1816 compilation unit CU. The result will be allocated on CU's
1817 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1818 field. NULL is returned if no prefix is necessary. */
1820 partial_die_parent_scope (struct partial_die_info
*pdi
,
1821 struct dwarf2_cu
*cu
)
1823 char *grandparent_scope
;
1824 struct partial_die_info
*parent
, *real_pdi
;
1826 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1827 then this means the parent of the specification DIE. */
1830 while (real_pdi
->has_specification
)
1831 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
1833 parent
= real_pdi
->die_parent
;
1837 if (parent
->scope_set
)
1838 return parent
->scope
;
1840 fixup_partial_die (parent
, cu
);
1842 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
1844 if (parent
->tag
== DW_TAG_namespace
1845 || parent
->tag
== DW_TAG_structure_type
1846 || parent
->tag
== DW_TAG_class_type
1847 || parent
->tag
== DW_TAG_union_type
)
1849 if (grandparent_scope
== NULL
)
1850 parent
->scope
= parent
->name
;
1852 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
1855 else if (parent
->tag
== DW_TAG_enumeration_type
)
1856 /* Enumerators should not get the name of the enumeration as a prefix. */
1857 parent
->scope
= grandparent_scope
;
1860 /* FIXME drow/2004-04-01: What should we be doing with
1861 function-local names? For partial symbols, we should probably be
1863 complaint (&symfile_complaints
,
1864 _("unhandled containing DIE tag %d for DIE at %d"),
1865 parent
->tag
, pdi
->offset
);
1866 parent
->scope
= grandparent_scope
;
1869 parent
->scope_set
= 1;
1870 return parent
->scope
;
1873 /* Return the fully scoped name associated with PDI, from compilation unit
1874 CU. The result will be allocated with malloc. */
1876 partial_die_full_name (struct partial_die_info
*pdi
,
1877 struct dwarf2_cu
*cu
)
1881 parent_scope
= partial_die_parent_scope (pdi
, cu
);
1882 if (parent_scope
== NULL
)
1885 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
1889 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
1891 struct objfile
*objfile
= cu
->objfile
;
1894 const char *my_prefix
;
1895 const struct partial_symbol
*psym
= NULL
;
1897 int built_actual_name
= 0;
1899 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1903 if (pdi_needs_namespace (pdi
->tag
))
1905 actual_name
= partial_die_full_name (pdi
, cu
);
1907 built_actual_name
= 1;
1910 if (actual_name
== NULL
)
1911 actual_name
= pdi
->name
;
1915 case DW_TAG_subprogram
:
1916 if (pdi
->is_external
)
1918 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1919 mst_text, objfile); */
1920 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1921 VAR_DOMAIN
, LOC_BLOCK
,
1922 &objfile
->global_psymbols
,
1923 0, pdi
->lowpc
+ baseaddr
,
1924 cu
->language
, objfile
);
1928 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1929 mst_file_text, objfile); */
1930 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1931 VAR_DOMAIN
, LOC_BLOCK
,
1932 &objfile
->static_psymbols
,
1933 0, pdi
->lowpc
+ baseaddr
,
1934 cu
->language
, objfile
);
1937 case DW_TAG_variable
:
1938 if (pdi
->is_external
)
1941 Don't enter into the minimal symbol tables as there is
1942 a minimal symbol table entry from the ELF symbols already.
1943 Enter into partial symbol table if it has a location
1944 descriptor or a type.
1945 If the location descriptor is missing, new_symbol will create
1946 a LOC_UNRESOLVED symbol, the address of the variable will then
1947 be determined from the minimal symbol table whenever the variable
1949 The address for the partial symbol table entry is not
1950 used by GDB, but it comes in handy for debugging partial symbol
1954 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1955 if (pdi
->locdesc
|| pdi
->has_type
)
1956 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1957 VAR_DOMAIN
, LOC_STATIC
,
1958 &objfile
->global_psymbols
,
1960 cu
->language
, objfile
);
1964 /* Static Variable. Skip symbols without location descriptors. */
1965 if (pdi
->locdesc
== NULL
)
1967 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1968 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1969 mst_file_data, objfile); */
1970 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1971 VAR_DOMAIN
, LOC_STATIC
,
1972 &objfile
->static_psymbols
,
1974 cu
->language
, objfile
);
1977 case DW_TAG_typedef
:
1978 case DW_TAG_base_type
:
1979 case DW_TAG_subrange_type
:
1980 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1981 VAR_DOMAIN
, LOC_TYPEDEF
,
1982 &objfile
->static_psymbols
,
1983 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1985 case DW_TAG_namespace
:
1986 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1987 VAR_DOMAIN
, LOC_TYPEDEF
,
1988 &objfile
->global_psymbols
,
1989 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1991 case DW_TAG_class_type
:
1992 case DW_TAG_structure_type
:
1993 case DW_TAG_union_type
:
1994 case DW_TAG_enumeration_type
:
1995 /* Skip external references. The DWARF standard says in the section
1996 about "Structure, Union, and Class Type Entries": "An incomplete
1997 structure, union or class type is represented by a structure,
1998 union or class entry that does not have a byte size attribute
1999 and that has a DW_AT_declaration attribute." */
2000 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2003 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2004 static vs. global. */
2005 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2006 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2007 (cu
->language
== language_cplus
2008 || cu
->language
== language_java
)
2009 ? &objfile
->global_psymbols
2010 : &objfile
->static_psymbols
,
2011 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2013 if (cu
->language
== language_cplus
2014 || cu
->language
== language_java
2015 || cu
->language
== language_ada
)
2017 /* For C++ and Java, these implicitly act as typedefs as well. */
2018 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2019 VAR_DOMAIN
, LOC_TYPEDEF
,
2020 &objfile
->global_psymbols
,
2021 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2024 case DW_TAG_enumerator
:
2025 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2026 VAR_DOMAIN
, LOC_CONST
,
2027 (cu
->language
== language_cplus
2028 || cu
->language
== language_java
)
2029 ? &objfile
->global_psymbols
2030 : &objfile
->static_psymbols
,
2031 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2037 /* Check to see if we should scan the name for possible namespace
2038 info. Only do this if this is C++, if we don't have namespace
2039 debugging info in the file, if the psym is of an appropriate type
2040 (otherwise we'll have psym == NULL), and if we actually had a
2041 mangled name to begin with. */
2043 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2044 cases which do not set PSYM above? */
2046 if (cu
->language
== language_cplus
2047 && cu
->has_namespace_info
== 0
2049 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2050 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2053 if (built_actual_name
)
2054 xfree (actual_name
);
2057 /* Determine whether a die of type TAG living in a C++ class or
2058 namespace needs to have the name of the scope prepended to the
2059 name listed in the die. */
2062 pdi_needs_namespace (enum dwarf_tag tag
)
2066 case DW_TAG_namespace
:
2067 case DW_TAG_typedef
:
2068 case DW_TAG_class_type
:
2069 case DW_TAG_structure_type
:
2070 case DW_TAG_union_type
:
2071 case DW_TAG_enumeration_type
:
2072 case DW_TAG_enumerator
:
2079 /* Read a partial die corresponding to a namespace; also, add a symbol
2080 corresponding to that namespace to the symbol table. NAMESPACE is
2081 the name of the enclosing namespace. */
2084 add_partial_namespace (struct partial_die_info
*pdi
,
2085 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2086 struct dwarf2_cu
*cu
)
2088 struct objfile
*objfile
= cu
->objfile
;
2090 /* Add a symbol for the namespace. */
2092 add_partial_symbol (pdi
, cu
);
2094 /* Now scan partial symbols in that namespace. */
2096 if (pdi
->has_children
)
2097 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, cu
);
2100 /* See if we can figure out if the class lives in a namespace. We do
2101 this by looking for a member function; its demangled name will
2102 contain namespace info, if there is any. */
2105 guess_structure_name (struct partial_die_info
*struct_pdi
,
2106 struct dwarf2_cu
*cu
)
2108 if ((cu
->language
== language_cplus
2109 || cu
->language
== language_java
)
2110 && cu
->has_namespace_info
== 0
2111 && struct_pdi
->has_children
)
2113 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2114 what template types look like, because the demangler
2115 frequently doesn't give the same name as the debug info. We
2116 could fix this by only using the demangled name to get the
2117 prefix (but see comment in read_structure_type). */
2119 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2120 struct partial_die_info
*real_pdi
;
2122 /* If this DIE (this DIE's specification, if any) has a parent, then
2123 we should not do this. We'll prepend the parent's fully qualified
2124 name when we create the partial symbol. */
2126 real_pdi
= struct_pdi
;
2127 while (real_pdi
->has_specification
)
2128 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2130 if (real_pdi
->die_parent
!= NULL
)
2133 while (child_pdi
!= NULL
)
2135 if (child_pdi
->tag
== DW_TAG_subprogram
)
2137 char *actual_class_name
2138 = language_class_name_from_physname (cu
->language_defn
,
2140 if (actual_class_name
!= NULL
)
2143 = obsavestring (actual_class_name
,
2144 strlen (actual_class_name
),
2145 &cu
->comp_unit_obstack
);
2146 xfree (actual_class_name
);
2151 child_pdi
= child_pdi
->die_sibling
;
2156 /* Read a partial die corresponding to an enumeration type. */
2159 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2160 struct dwarf2_cu
*cu
)
2162 struct objfile
*objfile
= cu
->objfile
;
2163 bfd
*abfd
= objfile
->obfd
;
2164 struct partial_die_info
*pdi
;
2166 if (enum_pdi
->name
!= NULL
)
2167 add_partial_symbol (enum_pdi
, cu
);
2169 pdi
= enum_pdi
->die_child
;
2172 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2173 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2175 add_partial_symbol (pdi
, cu
);
2176 pdi
= pdi
->die_sibling
;
2180 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2181 Return the corresponding abbrev, or NULL if the number is zero (indicating
2182 an empty DIE). In either case *BYTES_READ will be set to the length of
2183 the initial number. */
2185 static struct abbrev_info
*
2186 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2187 struct dwarf2_cu
*cu
)
2189 bfd
*abfd
= cu
->objfile
->obfd
;
2190 unsigned int abbrev_number
;
2191 struct abbrev_info
*abbrev
;
2193 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2195 if (abbrev_number
== 0)
2198 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2201 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2202 bfd_get_filename (abfd
));
2208 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2209 pointer to the end of a series of DIEs, terminated by an empty
2210 DIE. Any children of the skipped DIEs will also be skipped. */
2213 skip_children (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2215 struct abbrev_info
*abbrev
;
2216 unsigned int bytes_read
;
2220 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2222 return info_ptr
+ bytes_read
;
2224 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
2228 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2229 should point just after the initial uleb128 of a DIE, and the
2230 abbrev corresponding to that skipped uleb128 should be passed in
2231 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2235 skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
2236 struct dwarf2_cu
*cu
)
2238 unsigned int bytes_read
;
2239 struct attribute attr
;
2240 bfd
*abfd
= cu
->objfile
->obfd
;
2241 unsigned int form
, i
;
2243 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2245 /* The only abbrev we care about is DW_AT_sibling. */
2246 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2248 read_attribute (&attr
, &abbrev
->attrs
[i
],
2249 abfd
, info_ptr
, cu
);
2250 if (attr
.form
== DW_FORM_ref_addr
)
2251 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2253 return dwarf2_per_objfile
->info_buffer
2254 + dwarf2_get_ref_die_offset (&attr
, cu
);
2257 /* If it isn't DW_AT_sibling, skip this attribute. */
2258 form
= abbrev
->attrs
[i
].form
;
2263 case DW_FORM_ref_addr
:
2264 info_ptr
+= cu
->header
.addr_size
;
2283 case DW_FORM_string
:
2284 read_string (abfd
, info_ptr
, &bytes_read
);
2285 info_ptr
+= bytes_read
;
2288 info_ptr
+= cu
->header
.offset_size
;
2291 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2292 info_ptr
+= bytes_read
;
2294 case DW_FORM_block1
:
2295 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2297 case DW_FORM_block2
:
2298 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2300 case DW_FORM_block4
:
2301 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2305 case DW_FORM_ref_udata
:
2306 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2308 case DW_FORM_indirect
:
2309 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2310 info_ptr
+= bytes_read
;
2311 /* We need to continue parsing from here, so just go back to
2313 goto skip_attribute
;
2316 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2317 dwarf_form_name (form
),
2318 bfd_get_filename (abfd
));
2322 if (abbrev
->has_children
)
2323 return skip_children (info_ptr
, cu
);
2328 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2329 the next DIE after ORIG_PDI. */
2332 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, gdb_byte
*info_ptr
,
2333 bfd
*abfd
, struct dwarf2_cu
*cu
)
2335 /* Do we know the sibling already? */
2337 if (orig_pdi
->sibling
)
2338 return orig_pdi
->sibling
;
2340 /* Are there any children to deal with? */
2342 if (!orig_pdi
->has_children
)
2345 /* Skip the children the long way. */
2347 return skip_children (info_ptr
, cu
);
2350 /* Expand this partial symbol table into a full symbol table. */
2353 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2355 /* FIXME: This is barely more than a stub. */
2360 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2366 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2367 gdb_flush (gdb_stdout
);
2370 /* Restore our global data. */
2371 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2372 dwarf2_objfile_data_key
);
2374 psymtab_to_symtab_1 (pst
);
2376 /* Finish up the debug error message. */
2378 printf_filtered (_("done.\n"));
2383 /* Add PER_CU to the queue. */
2386 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2388 struct dwarf2_queue_item
*item
;
2391 item
= xmalloc (sizeof (*item
));
2392 item
->per_cu
= per_cu
;
2395 if (dwarf2_queue
== NULL
)
2396 dwarf2_queue
= item
;
2398 dwarf2_queue_tail
->next
= item
;
2400 dwarf2_queue_tail
= item
;
2403 /* Process the queue. */
2406 process_queue (struct objfile
*objfile
)
2408 struct dwarf2_queue_item
*item
, *next_item
;
2410 /* Initially, there is just one item on the queue. Load its DIEs,
2411 and the DIEs of any other compilation units it requires,
2414 for (item
= dwarf2_queue
; item
!= NULL
; item
= item
->next
)
2416 /* Read in this compilation unit. This may add new items to
2417 the end of the queue. */
2418 load_full_comp_unit (item
->per_cu
, objfile
);
2420 item
->per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
2421 dwarf2_per_objfile
->read_in_chain
= item
->per_cu
;
2423 /* If this compilation unit has already had full symbols created,
2424 reset the TYPE fields in each DIE. */
2425 if (item
->per_cu
->type_hash
)
2426 reset_die_and_siblings_types (item
->per_cu
->cu
->dies
,
2430 /* Now everything left on the queue needs to be read in. Process
2431 them, one at a time, removing from the queue as we finish. */
2432 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2434 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2435 process_full_comp_unit (item
->per_cu
);
2437 item
->per_cu
->queued
= 0;
2438 next_item
= item
->next
;
2442 dwarf2_queue_tail
= NULL
;
2445 /* Free all allocated queue entries. This function only releases anything if
2446 an error was thrown; if the queue was processed then it would have been
2447 freed as we went along. */
2450 dwarf2_release_queue (void *dummy
)
2452 struct dwarf2_queue_item
*item
, *last
;
2454 item
= dwarf2_queue
;
2457 /* Anything still marked queued is likely to be in an
2458 inconsistent state, so discard it. */
2459 if (item
->per_cu
->queued
)
2461 if (item
->per_cu
->cu
!= NULL
)
2462 free_one_cached_comp_unit (item
->per_cu
->cu
);
2463 item
->per_cu
->queued
= 0;
2471 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2474 /* Read in full symbols for PST, and anything it depends on. */
2477 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2479 struct dwarf2_per_cu_data
*per_cu
;
2480 struct cleanup
*back_to
;
2483 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2484 if (!pst
->dependencies
[i
]->readin
)
2486 /* Inform about additional files that need to be read in. */
2489 /* FIXME: i18n: Need to make this a single string. */
2490 fputs_filtered (" ", gdb_stdout
);
2492 fputs_filtered ("and ", gdb_stdout
);
2494 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2495 wrap_here (""); /* Flush output */
2496 gdb_flush (gdb_stdout
);
2498 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2501 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
2505 /* It's an include file, no symbols to read for it.
2506 Everything is in the parent symtab. */
2511 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2513 queue_comp_unit (per_cu
);
2515 process_queue (pst
->objfile
);
2517 /* Age the cache, releasing compilation units that have not
2518 been used recently. */
2519 age_cached_comp_units ();
2521 do_cleanups (back_to
);
2524 /* Load the DIEs associated with PST and PER_CU into memory. */
2526 static struct dwarf2_cu
*
2527 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2529 bfd
*abfd
= objfile
->obfd
;
2530 struct dwarf2_cu
*cu
;
2531 unsigned long offset
;
2533 struct cleanup
*back_to
, *free_cu_cleanup
;
2534 struct attribute
*attr
;
2537 /* Set local variables from the partial symbol table info. */
2538 offset
= per_cu
->offset
;
2540 info_ptr
= dwarf2_per_objfile
->info_buffer
+ offset
;
2542 cu
= xmalloc (sizeof (struct dwarf2_cu
));
2543 memset (cu
, 0, sizeof (struct dwarf2_cu
));
2545 /* If an error occurs while loading, release our storage. */
2546 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
2548 cu
->objfile
= objfile
;
2550 /* read in the comp_unit header */
2551 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
2553 /* Read the abbrevs for this compilation unit */
2554 dwarf2_read_abbrevs (abfd
, cu
);
2555 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2557 cu
->header
.offset
= offset
;
2559 cu
->per_cu
= per_cu
;
2562 /* We use this obstack for block values in dwarf_alloc_block. */
2563 obstack_init (&cu
->comp_unit_obstack
);
2565 cu
->dies
= read_comp_unit (info_ptr
, abfd
, cu
);
2567 /* We try not to read any attributes in this function, because not
2568 all objfiles needed for references have been loaded yet, and symbol
2569 table processing isn't initialized. But we have to set the CU language,
2570 or we won't be able to build types correctly. */
2571 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
2573 set_cu_language (DW_UNSND (attr
), cu
);
2575 set_cu_language (language_minimal
, cu
);
2577 do_cleanups (back_to
);
2579 /* We've successfully allocated this compilation unit. Let our caller
2580 clean it up when finished with it. */
2581 discard_cleanups (free_cu_cleanup
);
2586 /* Generate full symbol information for PST and CU, whose DIEs have
2587 already been loaded into memory. */
2590 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2592 struct partial_symtab
*pst
= per_cu
->psymtab
;
2593 struct dwarf2_cu
*cu
= per_cu
->cu
;
2594 struct objfile
*objfile
= pst
->objfile
;
2595 bfd
*abfd
= objfile
->obfd
;
2596 CORE_ADDR lowpc
, highpc
;
2597 struct symtab
*symtab
;
2598 struct cleanup
*back_to
;
2599 struct attribute
*attr
;
2602 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2604 /* We're in the global namespace. */
2605 processing_current_prefix
= "";
2608 back_to
= make_cleanup (really_free_pendings
, NULL
);
2610 cu
->list_in_scope
= &file_symbols
;
2612 /* Find the base address of the compilation unit for range lists and
2613 location lists. It will normally be specified by DW_AT_low_pc.
2614 In DWARF-3 draft 4, the base address could be overridden by
2615 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2616 compilation units with discontinuous ranges. */
2618 cu
->header
.base_known
= 0;
2619 cu
->header
.base_address
= 0;
2621 attr
= dwarf2_attr (cu
->dies
, DW_AT_entry_pc
, cu
);
2624 cu
->header
.base_address
= DW_ADDR (attr
);
2625 cu
->header
.base_known
= 1;
2629 attr
= dwarf2_attr (cu
->dies
, DW_AT_low_pc
, cu
);
2632 cu
->header
.base_address
= DW_ADDR (attr
);
2633 cu
->header
.base_known
= 1;
2637 /* Do line number decoding in read_file_scope () */
2638 process_die (cu
->dies
, cu
);
2640 /* Some compilers don't define a DW_AT_high_pc attribute for the
2641 compilation unit. If the DW_AT_high_pc is missing, synthesize
2642 it, by scanning the DIE's below the compilation unit. */
2643 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
2645 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
2647 /* Set symtab language to language from DW_AT_language.
2648 If the compilation is from a C file generated by language preprocessors,
2649 do not set the language if it was already deduced by start_subfile. */
2651 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
2653 symtab
->language
= cu
->language
;
2655 pst
->symtab
= symtab
;
2658 do_cleanups (back_to
);
2661 /* Process a die and its children. */
2664 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
2668 case DW_TAG_padding
:
2670 case DW_TAG_compile_unit
:
2671 read_file_scope (die
, cu
);
2673 case DW_TAG_subprogram
:
2674 read_subroutine_type (die
, cu
);
2675 read_func_scope (die
, cu
);
2677 case DW_TAG_inlined_subroutine
:
2678 /* FIXME: These are ignored for now.
2679 They could be used to set breakpoints on all inlined instances
2680 of a function and make GDB `next' properly over inlined functions. */
2682 case DW_TAG_lexical_block
:
2683 case DW_TAG_try_block
:
2684 case DW_TAG_catch_block
:
2685 read_lexical_block_scope (die
, cu
);
2687 case DW_TAG_class_type
:
2688 case DW_TAG_structure_type
:
2689 case DW_TAG_union_type
:
2690 read_structure_type (die
, cu
);
2691 process_structure_scope (die
, cu
);
2693 case DW_TAG_enumeration_type
:
2694 read_enumeration_type (die
, cu
);
2695 process_enumeration_scope (die
, cu
);
2698 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2699 a symbol or process any children. Therefore it doesn't do anything
2700 that won't be done on-demand by read_type_die. */
2701 case DW_TAG_subroutine_type
:
2702 read_subroutine_type (die
, cu
);
2704 case DW_TAG_set_type
:
2705 read_set_type (die
, cu
);
2707 case DW_TAG_array_type
:
2708 read_array_type (die
, cu
);
2710 case DW_TAG_pointer_type
:
2711 read_tag_pointer_type (die
, cu
);
2713 case DW_TAG_ptr_to_member_type
:
2714 read_tag_ptr_to_member_type (die
, cu
);
2716 case DW_TAG_reference_type
:
2717 read_tag_reference_type (die
, cu
);
2719 case DW_TAG_string_type
:
2720 read_tag_string_type (die
, cu
);
2724 case DW_TAG_base_type
:
2725 read_base_type (die
, cu
);
2726 /* Add a typedef symbol for the type definition, if it has a
2728 new_symbol (die
, die
->type
, cu
);
2730 case DW_TAG_subrange_type
:
2731 read_subrange_type (die
, cu
);
2732 /* Add a typedef symbol for the type definition, if it has a
2734 new_symbol (die
, die
->type
, cu
);
2736 case DW_TAG_common_block
:
2737 read_common_block (die
, cu
);
2739 case DW_TAG_common_inclusion
:
2741 case DW_TAG_namespace
:
2742 processing_has_namespace_info
= 1;
2743 read_namespace (die
, cu
);
2745 case DW_TAG_imported_declaration
:
2746 case DW_TAG_imported_module
:
2747 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2748 information contained in these. DW_TAG_imported_declaration
2749 dies shouldn't have children; DW_TAG_imported_module dies
2750 shouldn't in the C++ case, but conceivably could in the
2751 Fortran case, so we'll have to replace this gdb_assert if
2752 Fortran compilers start generating that info. */
2753 processing_has_namespace_info
= 1;
2754 gdb_assert (die
->child
== NULL
);
2757 new_symbol (die
, NULL
, cu
);
2763 initialize_cu_func_list (struct dwarf2_cu
*cu
)
2765 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
2769 free_cu_line_header (void *arg
)
2771 struct dwarf2_cu
*cu
= arg
;
2773 free_line_header (cu
->line_header
);
2774 cu
->line_header
= NULL
;
2778 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2780 struct objfile
*objfile
= cu
->objfile
;
2781 struct comp_unit_head
*cu_header
= &cu
->header
;
2782 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2783 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
2784 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
2785 struct attribute
*attr
;
2787 char *comp_dir
= NULL
;
2788 struct die_info
*child_die
;
2789 bfd
*abfd
= objfile
->obfd
;
2790 struct line_header
*line_header
= 0;
2793 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2795 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
2797 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2798 from finish_block. */
2799 if (lowpc
== ((CORE_ADDR
) -1))
2804 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
2807 name
= DW_STRING (attr
);
2810 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
2812 comp_dir
= DW_STRING (attr
);
2813 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
2815 comp_dir
= ldirname (name
);
2816 if (comp_dir
!= NULL
)
2817 make_cleanup (xfree
, comp_dir
);
2819 if (comp_dir
!= NULL
)
2821 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2822 directory, get rid of it. */
2823 char *cp
= strchr (comp_dir
, ':');
2825 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2832 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
2835 set_cu_language (DW_UNSND (attr
), cu
);
2838 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
2840 cu
->producer
= DW_STRING (attr
);
2842 /* We assume that we're processing GCC output. */
2843 processing_gcc_compilation
= 2;
2845 /* The compilation unit may be in a different language or objfile,
2846 zero out all remembered fundamental types. */
2847 memset (cu
->ftypes
, 0, FT_NUM_MEMBERS
* sizeof (struct type
*));
2849 start_symtab (name
, comp_dir
, lowpc
);
2850 record_debugformat ("DWARF 2");
2851 record_producer (cu
->producer
);
2853 initialize_cu_func_list (cu
);
2855 /* Decode line number information if present. We do this before
2856 processing child DIEs, so that the line header table is available
2857 for DW_AT_decl_file. */
2858 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2861 unsigned int line_offset
= DW_UNSND (attr
);
2862 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2865 cu
->line_header
= line_header
;
2866 make_cleanup (free_cu_line_header
, cu
);
2867 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
2871 /* Process all dies in compilation unit. */
2872 if (die
->child
!= NULL
)
2874 child_die
= die
->child
;
2875 while (child_die
&& child_die
->tag
)
2877 process_die (child_die
, cu
);
2878 child_die
= sibling_die (child_die
);
2882 /* Decode macro information, if present. Dwarf 2 macro information
2883 refers to information in the line number info statement program
2884 header, so we can only read it if we've read the header
2886 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
2887 if (attr
&& line_header
)
2889 unsigned int macro_offset
= DW_UNSND (attr
);
2890 dwarf_decode_macros (line_header
, macro_offset
,
2891 comp_dir
, abfd
, cu
);
2893 do_cleanups (back_to
);
2897 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
2898 struct dwarf2_cu
*cu
)
2900 struct function_range
*thisfn
;
2902 thisfn
= (struct function_range
*)
2903 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
2904 thisfn
->name
= name
;
2905 thisfn
->lowpc
= lowpc
;
2906 thisfn
->highpc
= highpc
;
2907 thisfn
->seen_line
= 0;
2908 thisfn
->next
= NULL
;
2910 if (cu
->last_fn
== NULL
)
2911 cu
->first_fn
= thisfn
;
2913 cu
->last_fn
->next
= thisfn
;
2915 cu
->last_fn
= thisfn
;
2919 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2921 struct objfile
*objfile
= cu
->objfile
;
2922 struct context_stack
*new;
2925 struct die_info
*child_die
;
2926 struct attribute
*attr
;
2928 const char *previous_prefix
= processing_current_prefix
;
2929 struct cleanup
*back_to
= NULL
;
2932 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2934 name
= dwarf2_linkage_name (die
, cu
);
2936 /* Ignore functions with missing or empty names and functions with
2937 missing or invalid low and high pc attributes. */
2938 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
2941 if (cu
->language
== language_cplus
2942 || cu
->language
== language_java
)
2944 struct die_info
*spec_die
= die_specification (die
, cu
);
2946 /* NOTE: carlton/2004-01-23: We have to be careful in the
2947 presence of DW_AT_specification. For example, with GCC 3.4,
2952 // Definition of N::foo.
2956 then we'll have a tree of DIEs like this:
2958 1: DW_TAG_compile_unit
2959 2: DW_TAG_namespace // N
2960 3: DW_TAG_subprogram // declaration of N::foo
2961 4: DW_TAG_subprogram // definition of N::foo
2962 DW_AT_specification // refers to die #3
2964 Thus, when processing die #4, we have to pretend that we're
2965 in the context of its DW_AT_specification, namely the contex
2968 if (spec_die
!= NULL
)
2970 char *specification_prefix
= determine_prefix (spec_die
, cu
);
2971 processing_current_prefix
= specification_prefix
;
2972 back_to
= make_cleanup (xfree
, specification_prefix
);
2979 /* Record the function range for dwarf_decode_lines. */
2980 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
2982 new = push_context (0, lowpc
);
2983 new->name
= new_symbol (die
, die
->type
, cu
);
2985 /* If there is a location expression for DW_AT_frame_base, record
2987 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
2989 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2990 expression is being recorded directly in the function's symbol
2991 and not in a separate frame-base object. I guess this hack is
2992 to avoid adding some sort of frame-base adjunct/annex to the
2993 function's symbol :-(. The problem with doing this is that it
2994 results in a function symbol with a location expression that
2995 has nothing to do with the location of the function, ouch! The
2996 relationship should be: a function's symbol has-a frame base; a
2997 frame-base has-a location expression. */
2998 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3000 cu
->list_in_scope
= &local_symbols
;
3002 if (die
->child
!= NULL
)
3004 child_die
= die
->child
;
3005 while (child_die
&& child_die
->tag
)
3007 process_die (child_die
, cu
);
3008 child_die
= sibling_die (child_die
);
3012 new = pop_context ();
3013 /* Make a block for the local symbols within. */
3014 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3015 lowpc
, highpc
, objfile
);
3017 /* In C++, we can have functions nested inside functions (e.g., when
3018 a function declares a class that has methods). This means that
3019 when we finish processing a function scope, we may need to go
3020 back to building a containing block's symbol lists. */
3021 local_symbols
= new->locals
;
3022 param_symbols
= new->params
;
3024 /* If we've finished processing a top-level function, subsequent
3025 symbols go in the file symbol list. */
3026 if (outermost_context_p ())
3027 cu
->list_in_scope
= &file_symbols
;
3029 processing_current_prefix
= previous_prefix
;
3030 if (back_to
!= NULL
)
3031 do_cleanups (back_to
);
3034 /* Process all the DIES contained within a lexical block scope. Start
3035 a new scope, process the dies, and then close the scope. */
3038 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3040 struct objfile
*objfile
= cu
->objfile
;
3041 struct context_stack
*new;
3042 CORE_ADDR lowpc
, highpc
;
3043 struct die_info
*child_die
;
3046 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3048 /* Ignore blocks with missing or invalid low and high pc attributes. */
3049 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3050 as multiple lexical blocks? Handling children in a sane way would
3051 be nasty. Might be easier to properly extend generic blocks to
3053 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3058 push_context (0, lowpc
);
3059 if (die
->child
!= NULL
)
3061 child_die
= die
->child
;
3062 while (child_die
&& child_die
->tag
)
3064 process_die (child_die
, cu
);
3065 child_die
= sibling_die (child_die
);
3068 new = pop_context ();
3070 if (local_symbols
!= NULL
)
3072 finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3075 local_symbols
= new->locals
;
3078 /* Get low and high pc attributes from a die. Return 1 if the attributes
3079 are present and valid, otherwise, return 0. Return -1 if the range is
3080 discontinuous, i.e. derived from DW_AT_ranges information. */
3082 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3083 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3085 struct objfile
*objfile
= cu
->objfile
;
3086 struct comp_unit_head
*cu_header
= &cu
->header
;
3087 struct attribute
*attr
;
3088 bfd
*obfd
= objfile
->obfd
;
3093 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3096 high
= DW_ADDR (attr
);
3097 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3099 low
= DW_ADDR (attr
);
3101 /* Found high w/o low attribute. */
3104 /* Found consecutive range of addresses. */
3109 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3112 unsigned int addr_size
= cu_header
->addr_size
;
3113 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3114 /* Value of the DW_AT_ranges attribute is the offset in the
3115 .debug_ranges section. */
3116 unsigned int offset
= DW_UNSND (attr
);
3117 /* Base address selection entry. */
3125 found_base
= cu_header
->base_known
;
3126 base
= cu_header
->base_address
;
3128 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3130 complaint (&symfile_complaints
,
3131 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3135 buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3137 /* Read in the largest possible address. */
3138 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3139 if ((marker
& mask
) == mask
)
3141 /* If we found the largest possible address, then
3142 read the base address. */
3143 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3144 buffer
+= 2 * addr_size
;
3145 offset
+= 2 * addr_size
;
3153 CORE_ADDR range_beginning
, range_end
;
3155 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3156 buffer
+= addr_size
;
3157 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3158 buffer
+= addr_size
;
3159 offset
+= 2 * addr_size
;
3161 /* An end of list marker is a pair of zero addresses. */
3162 if (range_beginning
== 0 && range_end
== 0)
3163 /* Found the end of list entry. */
3166 /* Each base address selection entry is a pair of 2 values.
3167 The first is the largest possible address, the second is
3168 the base address. Check for a base address here. */
3169 if ((range_beginning
& mask
) == mask
)
3171 /* If we found the largest possible address, then
3172 read the base address. */
3173 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3180 /* We have no valid base address for the ranges
3182 complaint (&symfile_complaints
,
3183 _("Invalid .debug_ranges data (no base address)"));
3187 range_beginning
+= base
;
3190 /* FIXME: This is recording everything as a low-high
3191 segment of consecutive addresses. We should have a
3192 data structure for discontiguous block ranges
3196 low
= range_beginning
;
3202 if (range_beginning
< low
)
3203 low
= range_beginning
;
3204 if (range_end
> high
)
3210 /* If the first entry is an end-of-list marker, the range
3211 describes an empty scope, i.e. no instructions. */
3221 /* When using the GNU linker, .gnu.linkonce. sections are used to
3222 eliminate duplicate copies of functions and vtables and such.
3223 The linker will arbitrarily choose one and discard the others.
3224 The AT_*_pc values for such functions refer to local labels in
3225 these sections. If the section from that file was discarded, the
3226 labels are not in the output, so the relocs get a value of 0.
3227 If this is a discarded function, mark the pc bounds as invalid,
3228 so that GDB will ignore it. */
3229 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3237 /* Get the low and high pc's represented by the scope DIE, and store
3238 them in *LOWPC and *HIGHPC. If the correct values can't be
3239 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3242 get_scope_pc_bounds (struct die_info
*die
,
3243 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3244 struct dwarf2_cu
*cu
)
3246 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3247 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3248 CORE_ADDR current_low
, current_high
;
3250 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3252 best_low
= current_low
;
3253 best_high
= current_high
;
3257 struct die_info
*child
= die
->child
;
3259 while (child
&& child
->tag
)
3261 switch (child
->tag
) {
3262 case DW_TAG_subprogram
:
3263 if (dwarf2_get_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
))
3265 best_low
= min (best_low
, current_low
);
3266 best_high
= max (best_high
, current_high
);
3269 case DW_TAG_namespace
:
3270 /* FIXME: carlton/2004-01-16: Should we do this for
3271 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3272 that current GCC's always emit the DIEs corresponding
3273 to definitions of methods of classes as children of a
3274 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3275 the DIEs giving the declarations, which could be
3276 anywhere). But I don't see any reason why the
3277 standards says that they have to be there. */
3278 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3280 if (current_low
!= ((CORE_ADDR
) -1))
3282 best_low
= min (best_low
, current_low
);
3283 best_high
= max (best_high
, current_high
);
3291 child
= sibling_die (child
);
3296 *highpc
= best_high
;
3299 /* Add an aggregate field to the field list. */
3302 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3303 struct dwarf2_cu
*cu
)
3305 struct objfile
*objfile
= cu
->objfile
;
3306 struct nextfield
*new_field
;
3307 struct attribute
*attr
;
3309 char *fieldname
= "";
3311 /* Allocate a new field list entry and link it in. */
3312 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3313 make_cleanup (xfree
, new_field
);
3314 memset (new_field
, 0, sizeof (struct nextfield
));
3315 new_field
->next
= fip
->fields
;
3316 fip
->fields
= new_field
;
3319 /* Handle accessibility and virtuality of field.
3320 The default accessibility for members is public, the default
3321 accessibility for inheritance is private. */
3322 if (die
->tag
!= DW_TAG_inheritance
)
3323 new_field
->accessibility
= DW_ACCESS_public
;
3325 new_field
->accessibility
= DW_ACCESS_private
;
3326 new_field
->virtuality
= DW_VIRTUALITY_none
;
3328 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3330 new_field
->accessibility
= DW_UNSND (attr
);
3331 if (new_field
->accessibility
!= DW_ACCESS_public
)
3332 fip
->non_public_fields
= 1;
3333 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3335 new_field
->virtuality
= DW_UNSND (attr
);
3337 fp
= &new_field
->field
;
3339 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3341 /* Data member other than a C++ static data member. */
3343 /* Get type of field. */
3344 fp
->type
= die_type (die
, cu
);
3346 FIELD_STATIC_KIND (*fp
) = 0;
3348 /* Get bit size of field (zero if none). */
3349 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3352 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3356 FIELD_BITSIZE (*fp
) = 0;
3359 /* Get bit offset of field. */
3360 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3363 FIELD_BITPOS (*fp
) =
3364 decode_locdesc (DW_BLOCK (attr
), cu
) * bits_per_byte
;
3367 FIELD_BITPOS (*fp
) = 0;
3368 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
3371 if (BITS_BIG_ENDIAN
)
3373 /* For big endian bits, the DW_AT_bit_offset gives the
3374 additional bit offset from the MSB of the containing
3375 anonymous object to the MSB of the field. We don't
3376 have to do anything special since we don't need to
3377 know the size of the anonymous object. */
3378 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
3382 /* For little endian bits, compute the bit offset to the
3383 MSB of the anonymous object, subtract off the number of
3384 bits from the MSB of the field to the MSB of the
3385 object, and then subtract off the number of bits of
3386 the field itself. The result is the bit offset of
3387 the LSB of the field. */
3389 int bit_offset
= DW_UNSND (attr
);
3391 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3394 /* The size of the anonymous object containing
3395 the bit field is explicit, so use the
3396 indicated size (in bytes). */
3397 anonymous_size
= DW_UNSND (attr
);
3401 /* The size of the anonymous object containing
3402 the bit field must be inferred from the type
3403 attribute of the data member containing the
3405 anonymous_size
= TYPE_LENGTH (fp
->type
);
3407 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
3408 - bit_offset
- FIELD_BITSIZE (*fp
);
3412 /* Get name of field. */
3413 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3414 if (attr
&& DW_STRING (attr
))
3415 fieldname
= DW_STRING (attr
);
3417 /* The name is already allocated along with this objfile, so we don't
3418 need to duplicate it for the type. */
3419 fp
->name
= fieldname
;
3421 /* Change accessibility for artificial fields (e.g. virtual table
3422 pointer or virtual base class pointer) to private. */
3423 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
3425 new_field
->accessibility
= DW_ACCESS_private
;
3426 fip
->non_public_fields
= 1;
3429 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
3431 /* C++ static member. */
3433 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3434 is a declaration, but all versions of G++ as of this writing
3435 (so through at least 3.2.1) incorrectly generate
3436 DW_TAG_variable tags. */
3440 /* Get name of field. */
3441 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3442 if (attr
&& DW_STRING (attr
))
3443 fieldname
= DW_STRING (attr
);
3447 /* Get physical name. */
3448 physname
= dwarf2_linkage_name (die
, cu
);
3450 /* The name is already allocated along with this objfile, so we don't
3451 need to duplicate it for the type. */
3452 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
3453 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3454 FIELD_NAME (*fp
) = fieldname
;
3456 else if (die
->tag
== DW_TAG_inheritance
)
3458 /* C++ base class field. */
3459 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3461 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), cu
)
3463 FIELD_BITSIZE (*fp
) = 0;
3464 FIELD_STATIC_KIND (*fp
) = 0;
3465 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3466 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
3467 fip
->nbaseclasses
++;
3471 /* Create the vector of fields, and attach it to the type. */
3474 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3475 struct dwarf2_cu
*cu
)
3477 int nfields
= fip
->nfields
;
3479 /* Record the field count, allocate space for the array of fields,
3480 and create blank accessibility bitfields if necessary. */
3481 TYPE_NFIELDS (type
) = nfields
;
3482 TYPE_FIELDS (type
) = (struct field
*)
3483 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3484 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3486 if (fip
->non_public_fields
)
3488 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3490 TYPE_FIELD_PRIVATE_BITS (type
) =
3491 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3492 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3494 TYPE_FIELD_PROTECTED_BITS (type
) =
3495 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3496 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3498 TYPE_FIELD_IGNORE_BITS (type
) =
3499 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3500 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3503 /* If the type has baseclasses, allocate and clear a bit vector for
3504 TYPE_FIELD_VIRTUAL_BITS. */
3505 if (fip
->nbaseclasses
)
3507 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
3508 unsigned char *pointer
;
3510 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3511 pointer
= TYPE_ALLOC (type
, num_bytes
);
3512 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
3513 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
3514 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
3517 /* Copy the saved-up fields into the field vector. Start from the head
3518 of the list, adding to the tail of the field array, so that they end
3519 up in the same order in the array in which they were added to the list. */
3520 while (nfields
-- > 0)
3522 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
3523 switch (fip
->fields
->accessibility
)
3525 case DW_ACCESS_private
:
3526 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3529 case DW_ACCESS_protected
:
3530 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3533 case DW_ACCESS_public
:
3537 /* Unknown accessibility. Complain and treat it as public. */
3539 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
3540 fip
->fields
->accessibility
);
3544 if (nfields
< fip
->nbaseclasses
)
3546 switch (fip
->fields
->virtuality
)
3548 case DW_VIRTUALITY_virtual
:
3549 case DW_VIRTUALITY_pure_virtual
:
3550 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
3554 fip
->fields
= fip
->fields
->next
;
3558 /* Add a member function to the proper fieldlist. */
3561 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
3562 struct type
*type
, struct dwarf2_cu
*cu
)
3564 struct objfile
*objfile
= cu
->objfile
;
3565 struct attribute
*attr
;
3566 struct fnfieldlist
*flp
;
3568 struct fn_field
*fnp
;
3571 struct nextfnfield
*new_fnfield
;
3573 /* Get name of member function. */
3574 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3575 if (attr
&& DW_STRING (attr
))
3576 fieldname
= DW_STRING (attr
);
3580 /* Get the mangled name. */
3581 physname
= dwarf2_linkage_name (die
, cu
);
3583 /* Look up member function name in fieldlist. */
3584 for (i
= 0; i
< fip
->nfnfields
; i
++)
3586 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
3590 /* Create new list element if necessary. */
3591 if (i
< fip
->nfnfields
)
3592 flp
= &fip
->fnfieldlists
[i
];
3595 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3597 fip
->fnfieldlists
= (struct fnfieldlist
*)
3598 xrealloc (fip
->fnfieldlists
,
3599 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
3600 * sizeof (struct fnfieldlist
));
3601 if (fip
->nfnfields
== 0)
3602 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
3604 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
3605 flp
->name
= fieldname
;
3611 /* Create a new member function field and chain it to the field list
3613 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
3614 make_cleanup (xfree
, new_fnfield
);
3615 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
3616 new_fnfield
->next
= flp
->head
;
3617 flp
->head
= new_fnfield
;
3620 /* Fill in the member function field info. */
3621 fnp
= &new_fnfield
->fnfield
;
3622 /* The name is already allocated along with this objfile, so we don't
3623 need to duplicate it for the type. */
3624 fnp
->physname
= physname
? physname
: "";
3625 fnp
->type
= alloc_type (objfile
);
3626 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
3628 int nparams
= TYPE_NFIELDS (die
->type
);
3630 /* TYPE is the domain of this method, and DIE->TYPE is the type
3631 of the method itself (TYPE_CODE_METHOD). */
3632 smash_to_method_type (fnp
->type
, type
,
3633 TYPE_TARGET_TYPE (die
->type
),
3634 TYPE_FIELDS (die
->type
),
3635 TYPE_NFIELDS (die
->type
),
3636 TYPE_VARARGS (die
->type
));
3638 /* Handle static member functions.
3639 Dwarf2 has no clean way to discern C++ static and non-static
3640 member functions. G++ helps GDB by marking the first
3641 parameter for non-static member functions (which is the
3642 this pointer) as artificial. We obtain this information
3643 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3644 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
3645 fnp
->voffset
= VOFFSET_STATIC
;
3648 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
3651 /* Get fcontext from DW_AT_containing_type if present. */
3652 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3653 fnp
->fcontext
= die_containing_type (die
, cu
);
3655 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3656 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3658 /* Get accessibility. */
3659 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3662 switch (DW_UNSND (attr
))
3664 case DW_ACCESS_private
:
3665 fnp
->is_private
= 1;
3667 case DW_ACCESS_protected
:
3668 fnp
->is_protected
= 1;
3673 /* Check for artificial methods. */
3674 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
3675 if (attr
&& DW_UNSND (attr
) != 0)
3676 fnp
->is_artificial
= 1;
3678 /* Get index in virtual function table if it is a virtual member function. */
3679 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
3682 /* Support the .debug_loc offsets */
3683 if (attr_form_is_block (attr
))
3685 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
3687 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
3689 dwarf2_complex_location_expr_complaint ();
3693 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3699 /* Create the vector of member function fields, and attach it to the type. */
3702 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
3703 struct dwarf2_cu
*cu
)
3705 struct fnfieldlist
*flp
;
3706 int total_length
= 0;
3709 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3710 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
3711 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
3713 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
3715 struct nextfnfield
*nfp
= flp
->head
;
3716 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
3719 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
3720 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
3721 fn_flp
->fn_fields
= (struct fn_field
*)
3722 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
3723 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
3724 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
3726 total_length
+= flp
->length
;
3729 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
3730 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
3733 /* Returns non-zero if NAME is the name of a vtable member in CU's
3734 language, zero otherwise. */
3736 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
3738 static const char vptr
[] = "_vptr";
3739 static const char vtable
[] = "vtable";
3741 /* Look for the C++ and Java forms of the vtable. */
3742 if ((cu
->language
== language_java
3743 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
3744 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
3745 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
3751 /* GCC outputs unnamed structures that are really pointers to member
3752 functions, with the ABI-specified layout. If DIE (from CU) describes
3753 such a structure, set its type, and return nonzero. Otherwise return
3756 GCC shouldn't do this; it should just output pointer to member DIEs.
3757 This is GCC PR debug/28767. */
3760 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
3762 struct objfile
*objfile
= cu
->objfile
;
3764 struct die_info
*pfn_die
, *delta_die
;
3765 struct attribute
*pfn_name
, *delta_name
;
3766 struct type
*pfn_type
, *domain_type
;
3768 /* Check for a structure with no name and two children. */
3769 if (die
->tag
!= DW_TAG_structure_type
3770 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
3771 || die
->child
== NULL
3772 || die
->child
->sibling
== NULL
3773 || (die
->child
->sibling
->sibling
!= NULL
3774 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
3777 /* Check for __pfn and __delta members. */
3778 pfn_die
= die
->child
;
3779 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
3780 if (pfn_die
->tag
!= DW_TAG_member
3782 || DW_STRING (pfn_name
) == NULL
3783 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
3786 delta_die
= pfn_die
->sibling
;
3787 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
3788 if (delta_die
->tag
!= DW_TAG_member
3789 || delta_name
== NULL
3790 || DW_STRING (delta_name
) == NULL
3791 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
3794 /* Find the type of the method. */
3795 pfn_type
= die_type (pfn_die
, cu
);
3796 if (pfn_type
== NULL
3797 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
3798 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
3801 /* Look for the "this" argument. */
3802 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
3803 if (TYPE_NFIELDS (pfn_type
) == 0
3804 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
3807 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
3808 type
= alloc_type (objfile
);
3809 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
3810 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
3811 TYPE_VARARGS (pfn_type
));
3812 type
= lookup_methodptr_type (type
);
3813 set_die_type (die
, type
, cu
);
3818 /* Called when we find the DIE that starts a structure or union scope
3819 (definition) to process all dies that define the members of the
3822 NOTE: we need to call struct_type regardless of whether or not the
3823 DIE has an at_name attribute, since it might be an anonymous
3824 structure or union. This gets the type entered into our set of
3827 However, if the structure is incomplete (an opaque struct/union)
3828 then suppress creating a symbol table entry for it since gdb only
3829 wants to find the one with the complete definition. Note that if
3830 it is complete, we just call new_symbol, which does it's own
3831 checking about whether the struct/union is anonymous or not (and
3832 suppresses creating a symbol table entry itself). */
3835 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
3837 struct objfile
*objfile
= cu
->objfile
;
3839 struct attribute
*attr
;
3840 const char *previous_prefix
= processing_current_prefix
;
3841 struct cleanup
*back_to
= NULL
;
3846 if (quirk_gcc_member_function_pointer (die
, cu
))
3849 type
= alloc_type (objfile
);
3850 INIT_CPLUS_SPECIFIC (type
);
3851 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3852 if (attr
&& DW_STRING (attr
))
3854 if (cu
->language
== language_cplus
3855 || cu
->language
== language_java
)
3857 char *new_prefix
= determine_class_name (die
, cu
);
3858 TYPE_TAG_NAME (type
) = obsavestring (new_prefix
,
3859 strlen (new_prefix
),
3860 &objfile
->objfile_obstack
);
3861 back_to
= make_cleanup (xfree
, new_prefix
);
3862 processing_current_prefix
= new_prefix
;
3866 /* The name is already allocated along with this objfile, so
3867 we don't need to duplicate it for the type. */
3868 TYPE_TAG_NAME (type
) = DW_STRING (attr
);
3872 if (die
->tag
== DW_TAG_structure_type
)
3874 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
3876 else if (die
->tag
== DW_TAG_union_type
)
3878 TYPE_CODE (type
) = TYPE_CODE_UNION
;
3882 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
3884 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
3887 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3890 TYPE_LENGTH (type
) = DW_UNSND (attr
);
3894 TYPE_LENGTH (type
) = 0;
3897 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB_SUPPORTED
;
3898 if (die_is_declaration (die
, cu
))
3899 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
3901 /* We need to add the type field to the die immediately so we don't
3902 infinitely recurse when dealing with pointers to the structure
3903 type within the structure itself. */
3904 set_die_type (die
, type
, cu
);
3906 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
3908 struct field_info fi
;
3909 struct die_info
*child_die
;
3910 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3912 memset (&fi
, 0, sizeof (struct field_info
));
3914 child_die
= die
->child
;
3916 while (child_die
&& child_die
->tag
)
3918 if (child_die
->tag
== DW_TAG_member
3919 || child_die
->tag
== DW_TAG_variable
)
3921 /* NOTE: carlton/2002-11-05: A C++ static data member
3922 should be a DW_TAG_member that is a declaration, but
3923 all versions of G++ as of this writing (so through at
3924 least 3.2.1) incorrectly generate DW_TAG_variable
3925 tags for them instead. */
3926 dwarf2_add_field (&fi
, child_die
, cu
);
3928 else if (child_die
->tag
== DW_TAG_subprogram
)
3930 /* C++ member function. */
3931 read_type_die (child_die
, cu
);
3932 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
3934 else if (child_die
->tag
== DW_TAG_inheritance
)
3936 /* C++ base class field. */
3937 dwarf2_add_field (&fi
, child_die
, cu
);
3939 child_die
= sibling_die (child_die
);
3942 /* Attach fields and member functions to the type. */
3944 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
3947 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
3949 /* Get the type which refers to the base class (possibly this
3950 class itself) which contains the vtable pointer for the current
3951 class from the DW_AT_containing_type attribute. */
3953 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3955 struct type
*t
= die_containing_type (die
, cu
);
3957 TYPE_VPTR_BASETYPE (type
) = t
;
3962 /* Our own class provides vtbl ptr. */
3963 for (i
= TYPE_NFIELDS (t
) - 1;
3964 i
>= TYPE_N_BASECLASSES (t
);
3967 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
3969 if (is_vtable_name (fieldname
, cu
))
3971 TYPE_VPTR_FIELDNO (type
) = i
;
3976 /* Complain if virtual function table field not found. */
3977 if (i
< TYPE_N_BASECLASSES (t
))
3978 complaint (&symfile_complaints
,
3979 _("virtual function table pointer not found when defining class '%s'"),
3980 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
3985 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3988 else if (cu
->producer
3989 && strncmp (cu
->producer
,
3990 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
3992 /* The IBM XLC compiler does not provide direct indication
3993 of the containing type, but the vtable pointer is
3994 always named __vfp. */
3998 for (i
= TYPE_NFIELDS (type
) - 1;
3999 i
>= TYPE_N_BASECLASSES (type
);
4002 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4004 TYPE_VPTR_FIELDNO (type
) = i
;
4005 TYPE_VPTR_BASETYPE (type
) = type
;
4012 do_cleanups (back_to
);
4015 processing_current_prefix
= previous_prefix
;
4016 if (back_to
!= NULL
)
4017 do_cleanups (back_to
);
4021 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4023 struct objfile
*objfile
= cu
->objfile
;
4024 const char *previous_prefix
= processing_current_prefix
;
4025 struct die_info
*child_die
= die
->child
;
4027 if (TYPE_TAG_NAME (die
->type
) != NULL
)
4028 processing_current_prefix
= TYPE_TAG_NAME (die
->type
);
4030 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4031 snapshots) has been known to create a die giving a declaration
4032 for a class that has, as a child, a die giving a definition for a
4033 nested class. So we have to process our children even if the
4034 current die is a declaration. Normally, of course, a declaration
4035 won't have any children at all. */
4037 while (child_die
!= NULL
&& child_die
->tag
)
4039 if (child_die
->tag
== DW_TAG_member
4040 || child_die
->tag
== DW_TAG_variable
4041 || child_die
->tag
== DW_TAG_inheritance
)
4046 process_die (child_die
, cu
);
4048 child_die
= sibling_die (child_die
);
4051 /* Do not consider external references. According to the DWARF standard,
4052 these DIEs are identified by the fact that they have no byte_size
4053 attribute, and a declaration attribute. */
4054 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4055 || !die_is_declaration (die
, cu
))
4056 new_symbol (die
, die
->type
, cu
);
4058 processing_current_prefix
= previous_prefix
;
4061 /* Given a DW_AT_enumeration_type die, set its type. We do not
4062 complete the type's fields yet, or create any symbols. */
4065 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4067 struct objfile
*objfile
= cu
->objfile
;
4069 struct attribute
*attr
;
4074 type
= alloc_type (objfile
);
4076 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4077 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4078 if (attr
&& DW_STRING (attr
))
4080 char *name
= DW_STRING (attr
);
4082 if (processing_has_namespace_info
)
4084 TYPE_TAG_NAME (type
) = typename_concat (&objfile
->objfile_obstack
,
4085 processing_current_prefix
,
4090 /* The name is already allocated along with this objfile, so
4091 we don't need to duplicate it for the type. */
4092 TYPE_TAG_NAME (type
) = name
;
4096 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4099 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4103 TYPE_LENGTH (type
) = 0;
4106 set_die_type (die
, type
, cu
);
4109 /* Determine the name of the type represented by DIE, which should be
4110 a named C++ or Java compound type. Return the name in question; the caller
4111 is responsible for xfree()'ing it. */
4114 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4116 struct cleanup
*back_to
= NULL
;
4117 struct die_info
*spec_die
= die_specification (die
, cu
);
4118 char *new_prefix
= NULL
;
4120 /* If this is the definition of a class that is declared by another
4121 die, then processing_current_prefix may not be accurate; see
4122 read_func_scope for a similar example. */
4123 if (spec_die
!= NULL
)
4125 char *specification_prefix
= determine_prefix (spec_die
, cu
);
4126 processing_current_prefix
= specification_prefix
;
4127 back_to
= make_cleanup (xfree
, specification_prefix
);
4130 /* If we don't have namespace debug info, guess the name by trying
4131 to demangle the names of members, just like we did in
4132 guess_structure_name. */
4133 if (!processing_has_namespace_info
)
4135 struct die_info
*child
;
4137 for (child
= die
->child
;
4138 child
!= NULL
&& child
->tag
!= 0;
4139 child
= sibling_die (child
))
4141 if (child
->tag
== DW_TAG_subprogram
)
4144 = language_class_name_from_physname (cu
->language_defn
,
4148 if (new_prefix
!= NULL
)
4154 if (new_prefix
== NULL
)
4156 const char *name
= dwarf2_name (die
, cu
);
4157 new_prefix
= typename_concat (NULL
, processing_current_prefix
,
4158 name
? name
: "<<anonymous>>",
4162 if (back_to
!= NULL
)
4163 do_cleanups (back_to
);
4168 /* Given a pointer to a die which begins an enumeration, process all
4169 the dies that define the members of the enumeration, and create the
4170 symbol for the enumeration type.
4172 NOTE: We reverse the order of the element list. */
4175 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4177 struct objfile
*objfile
= cu
->objfile
;
4178 struct die_info
*child_die
;
4179 struct field
*fields
;
4180 struct attribute
*attr
;
4183 int unsigned_enum
= 1;
4187 if (die
->child
!= NULL
)
4189 child_die
= die
->child
;
4190 while (child_die
&& child_die
->tag
)
4192 if (child_die
->tag
!= DW_TAG_enumerator
)
4194 process_die (child_die
, cu
);
4198 attr
= dwarf2_attr (child_die
, DW_AT_name
, cu
);
4201 sym
= new_symbol (child_die
, die
->type
, cu
);
4202 if (SYMBOL_VALUE (sym
) < 0)
4205 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4207 fields
= (struct field
*)
4209 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4210 * sizeof (struct field
));
4213 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
4214 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4215 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
4216 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4217 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
4223 child_die
= sibling_die (child_die
);
4228 TYPE_NFIELDS (die
->type
) = num_fields
;
4229 TYPE_FIELDS (die
->type
) = (struct field
*)
4230 TYPE_ALLOC (die
->type
, sizeof (struct field
) * num_fields
);
4231 memcpy (TYPE_FIELDS (die
->type
), fields
,
4232 sizeof (struct field
) * num_fields
);
4236 TYPE_FLAGS (die
->type
) |= TYPE_FLAG_UNSIGNED
;
4239 new_symbol (die
, die
->type
, cu
);
4242 /* Extract all information from a DW_TAG_array_type DIE and put it in
4243 the DIE's type field. For now, this only handles one dimensional
4247 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4249 struct objfile
*objfile
= cu
->objfile
;
4250 struct die_info
*child_die
;
4251 struct type
*type
= NULL
;
4252 struct type
*element_type
, *range_type
, *index_type
;
4253 struct type
**range_types
= NULL
;
4254 struct attribute
*attr
;
4256 struct cleanup
*back_to
;
4258 /* Return if we've already decoded this type. */
4264 element_type
= die_type (die
, cu
);
4266 /* Irix 6.2 native cc creates array types without children for
4267 arrays with unspecified length. */
4268 if (die
->child
== NULL
)
4270 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
, cu
);
4271 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4272 set_die_type (die
, create_array_type (NULL
, element_type
, range_type
),
4277 back_to
= make_cleanup (null_cleanup
, NULL
);
4278 child_die
= die
->child
;
4279 while (child_die
&& child_die
->tag
)
4281 if (child_die
->tag
== DW_TAG_subrange_type
)
4283 read_subrange_type (child_die
, cu
);
4285 if (child_die
->type
!= NULL
)
4287 /* The range type was succesfully read. Save it for
4288 the array type creation. */
4289 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4291 range_types
= (struct type
**)
4292 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4293 * sizeof (struct type
*));
4295 make_cleanup (free_current_contents
, &range_types
);
4297 range_types
[ndim
++] = child_die
->type
;
4300 child_die
= sibling_die (child_die
);
4303 /* Dwarf2 dimensions are output from left to right, create the
4304 necessary array types in backwards order. */
4306 type
= element_type
;
4308 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4312 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4317 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4320 /* Understand Dwarf2 support for vector types (like they occur on
4321 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4322 array type. This is not part of the Dwarf2/3 standard yet, but a
4323 custom vendor extension. The main difference between a regular
4324 array and the vector variant is that vectors are passed by value
4326 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4328 TYPE_FLAGS (type
) |= TYPE_FLAG_VECTOR
;
4330 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4331 if (attr
&& DW_STRING (attr
))
4332 TYPE_NAME (type
) = DW_STRING (attr
);
4334 do_cleanups (back_to
);
4336 /* Install the type in the die. */
4337 set_die_type (die
, type
, cu
);
4340 static enum dwarf_array_dim_ordering
4341 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4343 struct attribute
*attr
;
4345 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4347 if (attr
) return DW_SND (attr
);
4350 GNU F77 is a special case, as at 08/2004 array type info is the
4351 opposite order to the dwarf2 specification, but data is still
4352 laid out as per normal fortran.
4354 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4358 if (cu
->language
== language_fortran
&&
4359 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4361 return DW_ORD_row_major
;
4364 switch (cu
->language_defn
->la_array_ordering
)
4366 case array_column_major
:
4367 return DW_ORD_col_major
;
4368 case array_row_major
:
4370 return DW_ORD_row_major
;
4374 /* Extract all information from a DW_TAG_set_type DIE and put it in
4375 the DIE's type field. */
4378 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4380 if (die
->type
== NULL
)
4381 die
->type
= create_set_type ((struct type
*) NULL
, die_type (die
, cu
));
4384 /* First cut: install each common block member as a global variable. */
4387 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4389 struct die_info
*child_die
;
4390 struct attribute
*attr
;
4392 CORE_ADDR base
= (CORE_ADDR
) 0;
4394 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4397 /* Support the .debug_loc offsets */
4398 if (attr_form_is_block (attr
))
4400 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
4402 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
4404 dwarf2_complex_location_expr_complaint ();
4408 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4409 "common block member");
4412 if (die
->child
!= NULL
)
4414 child_die
= die
->child
;
4415 while (child_die
&& child_die
->tag
)
4417 sym
= new_symbol (child_die
, NULL
, cu
);
4418 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
4421 SYMBOL_VALUE_ADDRESS (sym
) =
4422 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
4423 add_symbol_to_list (sym
, &global_symbols
);
4425 child_die
= sibling_die (child_die
);
4430 /* Read a C++ namespace. */
4433 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4435 struct objfile
*objfile
= cu
->objfile
;
4436 const char *previous_prefix
= processing_current_prefix
;
4439 struct die_info
*current_die
;
4440 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4442 name
= namespace_name (die
, &is_anonymous
, cu
);
4444 /* Now build the name of the current namespace. */
4446 if (previous_prefix
[0] == '\0')
4448 processing_current_prefix
= name
;
4452 char *temp_name
= typename_concat (NULL
, previous_prefix
, name
, cu
);
4453 make_cleanup (xfree
, temp_name
);
4454 processing_current_prefix
= temp_name
;
4457 /* Add a symbol associated to this if we haven't seen the namespace
4458 before. Also, add a using directive if it's an anonymous
4461 if (dwarf2_extension (die
, cu
) == NULL
)
4465 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4466 this cast will hopefully become unnecessary. */
4467 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
4468 (char *) processing_current_prefix
,
4470 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
4472 new_symbol (die
, type
, cu
);
4473 set_die_type (die
, type
, cu
);
4476 cp_add_using_directive (processing_current_prefix
,
4477 strlen (previous_prefix
),
4478 strlen (processing_current_prefix
));
4481 if (die
->child
!= NULL
)
4483 struct die_info
*child_die
= die
->child
;
4485 while (child_die
&& child_die
->tag
)
4487 process_die (child_die
, cu
);
4488 child_die
= sibling_die (child_die
);
4492 processing_current_prefix
= previous_prefix
;
4493 do_cleanups (back_to
);
4496 /* Return the name of the namespace represented by DIE. Set
4497 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4501 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
4503 struct die_info
*current_die
;
4504 const char *name
= NULL
;
4506 /* Loop through the extensions until we find a name. */
4508 for (current_die
= die
;
4509 current_die
!= NULL
;
4510 current_die
= dwarf2_extension (die
, cu
))
4512 name
= dwarf2_name (current_die
, cu
);
4517 /* Is it an anonymous namespace? */
4519 *is_anonymous
= (name
== NULL
);
4521 name
= "(anonymous namespace)";
4526 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4527 the user defined type vector. */
4530 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4532 struct comp_unit_head
*cu_header
= &cu
->header
;
4534 struct attribute
*attr_byte_size
;
4535 struct attribute
*attr_address_class
;
4536 int byte_size
, addr_class
;
4543 type
= lookup_pointer_type (die_type (die
, cu
));
4545 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4547 byte_size
= DW_UNSND (attr_byte_size
);
4549 byte_size
= cu_header
->addr_size
;
4551 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
4552 if (attr_address_class
)
4553 addr_class
= DW_UNSND (attr_address_class
);
4555 addr_class
= DW_ADDR_none
;
4557 /* If the pointer size or address class is different than the
4558 default, create a type variant marked as such and set the
4559 length accordingly. */
4560 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
4562 if (gdbarch_address_class_type_flags_p (current_gdbarch
))
4566 type_flags
= gdbarch_address_class_type_flags
4567 (current_gdbarch
, byte_size
, addr_class
);
4568 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
4569 type
= make_type_with_address_space (type
, type_flags
);
4571 else if (TYPE_LENGTH (type
) != byte_size
)
4573 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
4576 /* Should we also complain about unhandled address classes? */
4580 TYPE_LENGTH (type
) = byte_size
;
4581 set_die_type (die
, type
, cu
);
4584 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4585 the user defined type vector. */
4588 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4590 struct objfile
*objfile
= cu
->objfile
;
4592 struct type
*to_type
;
4593 struct type
*domain
;
4600 to_type
= die_type (die
, cu
);
4601 domain
= die_containing_type (die
, cu
);
4603 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
4604 type
= lookup_methodptr_type (to_type
);
4606 type
= lookup_memberptr_type (to_type
, domain
);
4608 set_die_type (die
, type
, cu
);
4611 /* Extract all information from a DW_TAG_reference_type DIE and add to
4612 the user defined type vector. */
4615 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4617 struct comp_unit_head
*cu_header
= &cu
->header
;
4619 struct attribute
*attr
;
4626 type
= lookup_reference_type (die_type (die
, cu
));
4627 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4630 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4634 TYPE_LENGTH (type
) = cu_header
->addr_size
;
4636 set_die_type (die
, type
, cu
);
4640 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4642 struct type
*base_type
;
4649 base_type
= die_type (die
, cu
);
4650 set_die_type (die
, make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0),
4655 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4657 struct type
*base_type
;
4664 base_type
= die_type (die
, cu
);
4665 set_die_type (die
, make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0),
4669 /* Extract all information from a DW_TAG_string_type DIE and add to
4670 the user defined type vector. It isn't really a user defined type,
4671 but it behaves like one, with other DIE's using an AT_user_def_type
4672 attribute to reference it. */
4675 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4677 struct objfile
*objfile
= cu
->objfile
;
4678 struct type
*type
, *range_type
, *index_type
, *char_type
;
4679 struct attribute
*attr
;
4680 unsigned int length
;
4687 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
4690 length
= DW_UNSND (attr
);
4694 /* check for the DW_AT_byte_size attribute */
4695 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4698 length
= DW_UNSND (attr
);
4705 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
, cu
);
4706 range_type
= create_range_type (NULL
, index_type
, 1, length
);
4707 if (cu
->language
== language_fortran
)
4709 /* Need to create a unique string type for bounds
4711 type
= create_string_type (0, range_type
);
4715 char_type
= dwarf2_fundamental_type (objfile
, FT_CHAR
, cu
);
4716 type
= create_string_type (char_type
, range_type
);
4718 set_die_type (die
, type
, cu
);
4721 /* Handle DIES due to C code like:
4725 int (*funcp)(int a, long l);
4729 ('funcp' generates a DW_TAG_subroutine_type DIE)
4733 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4735 struct type
*type
; /* Type that this function returns */
4736 struct type
*ftype
; /* Function that returns above type */
4737 struct attribute
*attr
;
4739 /* Decode the type that this subroutine returns */
4744 type
= die_type (die
, cu
);
4745 ftype
= make_function_type (type
, (struct type
**) 0);
4747 /* All functions in C++ and Java have prototypes. */
4748 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
4749 if ((attr
&& (DW_UNSND (attr
) != 0))
4750 || cu
->language
== language_cplus
4751 || cu
->language
== language_java
)
4752 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
4754 if (die
->child
!= NULL
)
4756 struct die_info
*child_die
;
4760 /* Count the number of parameters.
4761 FIXME: GDB currently ignores vararg functions, but knows about
4762 vararg member functions. */
4763 child_die
= die
->child
;
4764 while (child_die
&& child_die
->tag
)
4766 if (child_die
->tag
== DW_TAG_formal_parameter
)
4768 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
4769 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
4770 child_die
= sibling_die (child_die
);
4773 /* Allocate storage for parameters and fill them in. */
4774 TYPE_NFIELDS (ftype
) = nparams
;
4775 TYPE_FIELDS (ftype
) = (struct field
*)
4776 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
4778 child_die
= die
->child
;
4779 while (child_die
&& child_die
->tag
)
4781 if (child_die
->tag
== DW_TAG_formal_parameter
)
4783 /* Dwarf2 has no clean way to discern C++ static and non-static
4784 member functions. G++ helps GDB by marking the first
4785 parameter for non-static member functions (which is the
4786 this pointer) as artificial. We pass this information
4787 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4788 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
4790 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
4792 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
4793 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
4796 child_die
= sibling_die (child_die
);
4800 set_die_type (die
, ftype
, cu
);
4804 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
4806 struct objfile
*objfile
= cu
->objfile
;
4807 struct attribute
*attr
;
4812 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4813 if (attr
&& DW_STRING (attr
))
4815 name
= DW_STRING (attr
);
4817 set_die_type (die
, init_type (TYPE_CODE_TYPEDEF
, 0,
4818 TYPE_FLAG_TARGET_STUB
, name
, objfile
),
4820 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, cu
);
4824 /* Find a representation of a given base type and install
4825 it in the TYPE field of the die. */
4828 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4830 struct objfile
*objfile
= cu
->objfile
;
4832 struct attribute
*attr
;
4833 int encoding
= 0, size
= 0;
4835 /* If we've already decoded this die, this is a no-op. */
4841 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
4844 encoding
= DW_UNSND (attr
);
4846 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4849 size
= DW_UNSND (attr
);
4851 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4852 if (attr
&& DW_STRING (attr
))
4854 enum type_code code
= TYPE_CODE_INT
;
4859 case DW_ATE_address
:
4860 /* Turn DW_ATE_address into a void * pointer. */
4861 code
= TYPE_CODE_PTR
;
4862 type_flags
|= TYPE_FLAG_UNSIGNED
;
4864 case DW_ATE_boolean
:
4865 code
= TYPE_CODE_BOOL
;
4866 type_flags
|= TYPE_FLAG_UNSIGNED
;
4868 case DW_ATE_complex_float
:
4869 code
= TYPE_CODE_COMPLEX
;
4872 code
= TYPE_CODE_FLT
;
4876 case DW_ATE_unsigned
:
4877 type_flags
|= TYPE_FLAG_UNSIGNED
;
4879 case DW_ATE_signed_char
:
4880 if (cu
->language
== language_m2
)
4881 code
= TYPE_CODE_CHAR
;
4883 case DW_ATE_unsigned_char
:
4884 if (cu
->language
== language_m2
)
4885 code
= TYPE_CODE_CHAR
;
4886 type_flags
|= TYPE_FLAG_UNSIGNED
;
4889 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
4890 dwarf_type_encoding_name (encoding
));
4893 type
= init_type (code
, size
, type_flags
, DW_STRING (attr
), objfile
);
4894 if (encoding
== DW_ATE_address
)
4895 TYPE_TARGET_TYPE (type
) = dwarf2_fundamental_type (objfile
, FT_VOID
,
4897 else if (encoding
== DW_ATE_complex_float
)
4900 TYPE_TARGET_TYPE (type
)
4901 = dwarf2_fundamental_type (objfile
, FT_EXT_PREC_FLOAT
, cu
);
4902 else if (size
== 16)
4903 TYPE_TARGET_TYPE (type
)
4904 = dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
, cu
);
4906 TYPE_TARGET_TYPE (type
)
4907 = dwarf2_fundamental_type (objfile
, FT_FLOAT
, cu
);
4912 type
= dwarf_base_type (encoding
, size
, cu
);
4914 set_die_type (die
, type
, cu
);
4917 /* Read the given DW_AT_subrange DIE. */
4920 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4922 struct type
*base_type
;
4923 struct type
*range_type
;
4924 struct attribute
*attr
;
4928 /* If we have already decoded this die, then nothing more to do. */
4932 base_type
= die_type (die
, cu
);
4933 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
4935 complaint (&symfile_complaints
,
4936 _("DW_AT_type missing from DW_TAG_subrange_type"));
4937 base_type
= dwarf_base_type (DW_ATE_signed
, TARGET_ADDR_BIT
/ 8, cu
);
4940 if (cu
->language
== language_fortran
)
4942 /* FORTRAN implies a lower bound of 1, if not given. */
4946 /* FIXME: For variable sized arrays either of these could be
4947 a variable rather than a constant value. We'll allow it,
4948 but we don't know how to handle it. */
4949 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
4951 low
= dwarf2_get_attr_constant_value (attr
, 0);
4953 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
4956 if (attr
->form
== DW_FORM_block1
)
4958 /* GCC encodes arrays with unspecified or dynamic length
4959 with a DW_FORM_block1 attribute.
4960 FIXME: GDB does not yet know how to handle dynamic
4961 arrays properly, treat them as arrays with unspecified
4964 FIXME: jimb/2003-09-22: GDB does not really know
4965 how to handle arrays of unspecified length
4966 either; we just represent them as zero-length
4967 arrays. Choose an appropriate upper bound given
4968 the lower bound we've computed above. */
4972 high
= dwarf2_get_attr_constant_value (attr
, 1);
4975 range_type
= create_range_type (NULL
, base_type
, low
, high
);
4977 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
4978 if (attr
&& DW_STRING (attr
))
4979 TYPE_NAME (range_type
) = DW_STRING (attr
);
4981 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4983 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
4985 set_die_type (die
, range_type
, cu
);
4989 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4992 struct attribute
*attr
;
4997 /* For now, we only support the C meaning of an unspecified type: void. */
4999 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5000 type
= init_type (TYPE_CODE_VOID
, 0, 0, attr
? DW_STRING (attr
) : "",
5003 set_die_type (die
, type
, cu
);
5006 /* Read a whole compilation unit into a linked list of dies. */
5008 static struct die_info
*
5009 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5011 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5014 /* Read a single die and all its descendents. Set the die's sibling
5015 field to NULL; set other fields in the die correctly, and set all
5016 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5017 location of the info_ptr after reading all of those dies. PARENT
5018 is the parent of the die in question. */
5020 static struct die_info
*
5021 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5022 struct dwarf2_cu
*cu
,
5023 gdb_byte
**new_info_ptr
,
5024 struct die_info
*parent
)
5026 struct die_info
*die
;
5030 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5031 store_in_ref_table (die
->offset
, die
, cu
);
5035 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5041 *new_info_ptr
= cur_ptr
;
5044 die
->sibling
= NULL
;
5045 die
->parent
= parent
;
5049 /* Read a die, all of its descendents, and all of its siblings; set
5050 all of the fields of all of the dies correctly. Arguments are as
5051 in read_die_and_children. */
5053 static struct die_info
*
5054 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5055 struct dwarf2_cu
*cu
,
5056 gdb_byte
**new_info_ptr
,
5057 struct die_info
*parent
)
5059 struct die_info
*first_die
, *last_sibling
;
5063 first_die
= last_sibling
= NULL
;
5067 struct die_info
*die
5068 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5076 last_sibling
->sibling
= die
;
5081 *new_info_ptr
= cur_ptr
;
5091 /* Free a linked list of dies. */
5094 free_die_list (struct die_info
*dies
)
5096 struct die_info
*die
, *next
;
5101 if (die
->child
!= NULL
)
5102 free_die_list (die
->child
);
5103 next
= die
->sibling
;
5110 /* Read the contents of the section at OFFSET and of size SIZE from the
5111 object file specified by OBJFILE into the objfile_obstack and return it. */
5114 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5116 bfd
*abfd
= objfile
->obfd
;
5117 gdb_byte
*buf
, *retbuf
;
5118 bfd_size_type size
= bfd_get_section_size (sectp
);
5123 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5124 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5128 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5129 || bfd_bread (buf
, size
, abfd
) != size
)
5130 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5131 bfd_get_filename (abfd
));
5136 /* In DWARF version 2, the description of the debugging information is
5137 stored in a separate .debug_abbrev section. Before we read any
5138 dies from a section we read in all abbreviations and install them
5139 in a hash table. This function also sets flags in CU describing
5140 the data found in the abbrev table. */
5143 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5145 struct comp_unit_head
*cu_header
= &cu
->header
;
5146 gdb_byte
*abbrev_ptr
;
5147 struct abbrev_info
*cur_abbrev
;
5148 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5149 unsigned int abbrev_form
, hash_number
;
5150 struct attr_abbrev
*cur_attrs
;
5151 unsigned int allocated_attrs
;
5153 /* Initialize dwarf2 abbrevs */
5154 obstack_init (&cu
->abbrev_obstack
);
5155 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5157 * sizeof (struct abbrev_info
*)));
5158 memset (cu
->dwarf2_abbrevs
, 0,
5159 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5161 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5162 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5163 abbrev_ptr
+= bytes_read
;
5165 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5166 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5168 /* loop until we reach an abbrev number of 0 */
5169 while (abbrev_number
)
5171 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5173 /* read in abbrev header */
5174 cur_abbrev
->number
= abbrev_number
;
5175 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5176 abbrev_ptr
+= bytes_read
;
5177 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5180 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5181 cu
->has_namespace_info
= 1;
5183 /* now read in declarations */
5184 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5185 abbrev_ptr
+= bytes_read
;
5186 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5187 abbrev_ptr
+= bytes_read
;
5190 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5192 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5194 = xrealloc (cur_attrs
, (allocated_attrs
5195 * sizeof (struct attr_abbrev
)));
5198 /* Record whether this compilation unit might have
5199 inter-compilation-unit references. If we don't know what form
5200 this attribute will have, then it might potentially be a
5201 DW_FORM_ref_addr, so we conservatively expect inter-CU
5204 if (abbrev_form
== DW_FORM_ref_addr
5205 || abbrev_form
== DW_FORM_indirect
)
5206 cu
->has_form_ref_addr
= 1;
5208 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5209 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5210 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5211 abbrev_ptr
+= bytes_read
;
5212 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5213 abbrev_ptr
+= bytes_read
;
5216 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5217 (cur_abbrev
->num_attrs
5218 * sizeof (struct attr_abbrev
)));
5219 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5220 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5222 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5223 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5224 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5226 /* Get next abbreviation.
5227 Under Irix6 the abbreviations for a compilation unit are not
5228 always properly terminated with an abbrev number of 0.
5229 Exit loop if we encounter an abbreviation which we have
5230 already read (which means we are about to read the abbreviations
5231 for the next compile unit) or if the end of the abbreviation
5232 table is reached. */
5233 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5234 >= dwarf2_per_objfile
->abbrev_size
)
5236 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5237 abbrev_ptr
+= bytes_read
;
5238 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5245 /* Release the memory used by the abbrev table for a compilation unit. */
5248 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5250 struct dwarf2_cu
*cu
= ptr_to_cu
;
5252 obstack_free (&cu
->abbrev_obstack
, NULL
);
5253 cu
->dwarf2_abbrevs
= NULL
;
5256 /* Lookup an abbrev_info structure in the abbrev hash table. */
5258 static struct abbrev_info
*
5259 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5261 unsigned int hash_number
;
5262 struct abbrev_info
*abbrev
;
5264 hash_number
= number
% ABBREV_HASH_SIZE
;
5265 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5269 if (abbrev
->number
== number
)
5272 abbrev
= abbrev
->next
;
5277 /* Returns nonzero if TAG represents a type that we might generate a partial
5281 is_type_tag_for_partial (int tag
)
5286 /* Some types that would be reasonable to generate partial symbols for,
5287 that we don't at present. */
5288 case DW_TAG_array_type
:
5289 case DW_TAG_file_type
:
5290 case DW_TAG_ptr_to_member_type
:
5291 case DW_TAG_set_type
:
5292 case DW_TAG_string_type
:
5293 case DW_TAG_subroutine_type
:
5295 case DW_TAG_base_type
:
5296 case DW_TAG_class_type
:
5297 case DW_TAG_enumeration_type
:
5298 case DW_TAG_structure_type
:
5299 case DW_TAG_subrange_type
:
5300 case DW_TAG_typedef
:
5301 case DW_TAG_union_type
:
5308 /* Load all DIEs that are interesting for partial symbols into memory. */
5310 static struct partial_die_info
*
5311 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5312 struct dwarf2_cu
*cu
)
5314 struct partial_die_info
*part_die
;
5315 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5316 struct abbrev_info
*abbrev
;
5317 unsigned int bytes_read
;
5318 unsigned int load_all
= 0;
5320 int nesting_level
= 1;
5325 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5329 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5333 &cu
->comp_unit_obstack
,
5334 hashtab_obstack_allocate
,
5335 dummy_obstack_deallocate
);
5337 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5338 sizeof (struct partial_die_info
));
5342 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5344 /* A NULL abbrev means the end of a series of children. */
5347 if (--nesting_level
== 0)
5349 /* PART_DIE was probably the last thing allocated on the
5350 comp_unit_obstack, so we could call obstack_free
5351 here. We don't do that because the waste is small,
5352 and will be cleaned up when we're done with this
5353 compilation unit. This way, we're also more robust
5354 against other users of the comp_unit_obstack. */
5357 info_ptr
+= bytes_read
;
5358 last_die
= parent_die
;
5359 parent_die
= parent_die
->die_parent
;
5363 /* Check whether this DIE is interesting enough to save. Normally
5364 we would not be interested in members here, but there may be
5365 later variables referencing them via DW_AT_specification (for
5368 && !is_type_tag_for_partial (abbrev
->tag
)
5369 && abbrev
->tag
!= DW_TAG_enumerator
5370 && abbrev
->tag
!= DW_TAG_subprogram
5371 && abbrev
->tag
!= DW_TAG_variable
5372 && abbrev
->tag
!= DW_TAG_namespace
5373 && abbrev
->tag
!= DW_TAG_member
)
5375 /* Otherwise we skip to the next sibling, if any. */
5376 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5380 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5381 abfd
, info_ptr
, cu
);
5383 /* This two-pass algorithm for processing partial symbols has a
5384 high cost in cache pressure. Thus, handle some simple cases
5385 here which cover the majority of C partial symbols. DIEs
5386 which neither have specification tags in them, nor could have
5387 specification tags elsewhere pointing at them, can simply be
5388 processed and discarded.
5390 This segment is also optional; scan_partial_symbols and
5391 add_partial_symbol will handle these DIEs if we chain
5392 them in normally. When compilers which do not emit large
5393 quantities of duplicate debug information are more common,
5394 this code can probably be removed. */
5396 /* Any complete simple types at the top level (pretty much all
5397 of them, for a language without namespaces), can be processed
5399 if (parent_die
== NULL
5400 && part_die
->has_specification
== 0
5401 && part_die
->is_declaration
== 0
5402 && (part_die
->tag
== DW_TAG_typedef
5403 || part_die
->tag
== DW_TAG_base_type
5404 || part_die
->tag
== DW_TAG_subrange_type
))
5406 if (building_psymtab
&& part_die
->name
!= NULL
)
5407 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5408 VAR_DOMAIN
, LOC_TYPEDEF
,
5409 &cu
->objfile
->static_psymbols
,
5410 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5411 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5415 /* If we're at the second level, and we're an enumerator, and
5416 our parent has no specification (meaning possibly lives in a
5417 namespace elsewhere), then we can add the partial symbol now
5418 instead of queueing it. */
5419 if (part_die
->tag
== DW_TAG_enumerator
5420 && parent_die
!= NULL
5421 && parent_die
->die_parent
== NULL
5422 && parent_die
->tag
== DW_TAG_enumeration_type
5423 && parent_die
->has_specification
== 0)
5425 if (part_die
->name
== NULL
)
5426 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5427 else if (building_psymtab
)
5428 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5429 VAR_DOMAIN
, LOC_CONST
,
5430 (cu
->language
== language_cplus
5431 || cu
->language
== language_java
)
5432 ? &cu
->objfile
->global_psymbols
5433 : &cu
->objfile
->static_psymbols
,
5434 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5436 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5440 /* We'll save this DIE so link it in. */
5441 part_die
->die_parent
= parent_die
;
5442 part_die
->die_sibling
= NULL
;
5443 part_die
->die_child
= NULL
;
5445 if (last_die
&& last_die
== parent_die
)
5446 last_die
->die_child
= part_die
;
5448 last_die
->die_sibling
= part_die
;
5450 last_die
= part_die
;
5452 if (first_die
== NULL
)
5453 first_die
= part_die
;
5455 /* Maybe add the DIE to the hash table. Not all DIEs that we
5456 find interesting need to be in the hash table, because we
5457 also have the parent/sibling/child chains; only those that we
5458 might refer to by offset later during partial symbol reading.
5460 For now this means things that might have be the target of a
5461 DW_AT_specification, DW_AT_abstract_origin, or
5462 DW_AT_extension. DW_AT_extension will refer only to
5463 namespaces; DW_AT_abstract_origin refers to functions (and
5464 many things under the function DIE, but we do not recurse
5465 into function DIEs during partial symbol reading) and
5466 possibly variables as well; DW_AT_specification refers to
5467 declarations. Declarations ought to have the DW_AT_declaration
5468 flag. It happens that GCC forgets to put it in sometimes, but
5469 only for functions, not for types.
5471 Adding more things than necessary to the hash table is harmless
5472 except for the performance cost. Adding too few will result in
5473 wasted time in find_partial_die, when we reread the compilation
5474 unit with load_all_dies set. */
5477 || abbrev
->tag
== DW_TAG_subprogram
5478 || abbrev
->tag
== DW_TAG_variable
5479 || abbrev
->tag
== DW_TAG_namespace
5480 || part_die
->is_declaration
)
5484 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5485 part_die
->offset
, INSERT
);
5489 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5490 sizeof (struct partial_die_info
));
5492 /* For some DIEs we want to follow their children (if any). For C
5493 we have no reason to follow the children of structures; for other
5494 languages we have to, both so that we can get at method physnames
5495 to infer fully qualified class names, and for DW_AT_specification. */
5496 if (last_die
->has_children
5498 || last_die
->tag
== DW_TAG_namespace
5499 || last_die
->tag
== DW_TAG_enumeration_type
5500 || (cu
->language
!= language_c
5501 && (last_die
->tag
== DW_TAG_class_type
5502 || last_die
->tag
== DW_TAG_structure_type
5503 || last_die
->tag
== DW_TAG_union_type
))))
5506 parent_die
= last_die
;
5510 /* Otherwise we skip to the next sibling, if any. */
5511 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5513 /* Back to the top, do it again. */
5517 /* Read a minimal amount of information into the minimal die structure. */
5520 read_partial_die (struct partial_die_info
*part_die
,
5521 struct abbrev_info
*abbrev
,
5522 unsigned int abbrev_len
, bfd
*abfd
,
5523 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5525 unsigned int bytes_read
, i
;
5526 struct attribute attr
;
5527 int has_low_pc_attr
= 0;
5528 int has_high_pc_attr
= 0;
5530 memset (part_die
, 0, sizeof (struct partial_die_info
));
5532 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5534 info_ptr
+= abbrev_len
;
5539 part_die
->tag
= abbrev
->tag
;
5540 part_die
->has_children
= abbrev
->has_children
;
5542 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5544 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5546 /* Store the data if it is of an attribute we want to keep in a
5547 partial symbol table. */
5552 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5553 if (part_die
->name
== NULL
)
5554 part_die
->name
= DW_STRING (&attr
);
5556 case DW_AT_comp_dir
:
5557 if (part_die
->dirname
== NULL
)
5558 part_die
->dirname
= DW_STRING (&attr
);
5560 case DW_AT_MIPS_linkage_name
:
5561 part_die
->name
= DW_STRING (&attr
);
5564 has_low_pc_attr
= 1;
5565 part_die
->lowpc
= DW_ADDR (&attr
);
5568 has_high_pc_attr
= 1;
5569 part_die
->highpc
= DW_ADDR (&attr
);
5571 case DW_AT_location
:
5572 /* Support the .debug_loc offsets */
5573 if (attr_form_is_block (&attr
))
5575 part_die
->locdesc
= DW_BLOCK (&attr
);
5577 else if (attr
.form
== DW_FORM_data4
|| attr
.form
== DW_FORM_data8
)
5579 dwarf2_complex_location_expr_complaint ();
5583 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5584 "partial symbol information");
5587 case DW_AT_language
:
5588 part_die
->language
= DW_UNSND (&attr
);
5590 case DW_AT_external
:
5591 part_die
->is_external
= DW_UNSND (&attr
);
5593 case DW_AT_declaration
:
5594 part_die
->is_declaration
= DW_UNSND (&attr
);
5597 part_die
->has_type
= 1;
5599 case DW_AT_abstract_origin
:
5600 case DW_AT_specification
:
5601 case DW_AT_extension
:
5602 part_die
->has_specification
= 1;
5603 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5606 /* Ignore absolute siblings, they might point outside of
5607 the current compile unit. */
5608 if (attr
.form
== DW_FORM_ref_addr
)
5609 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5611 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5612 + dwarf2_get_ref_die_offset (&attr
, cu
);
5614 case DW_AT_stmt_list
:
5615 part_die
->has_stmt_list
= 1;
5616 part_die
->line_offset
= DW_UNSND (&attr
);
5618 case DW_AT_byte_size
:
5619 part_die
->has_byte_size
= 1;
5626 /* When using the GNU linker, .gnu.linkonce. sections are used to
5627 eliminate duplicate copies of functions and vtables and such.
5628 The linker will arbitrarily choose one and discard the others.
5629 The AT_*_pc values for such functions refer to local labels in
5630 these sections. If the section from that file was discarded, the
5631 labels are not in the output, so the relocs get a value of 0.
5632 If this is a discarded function, mark the pc bounds as invalid,
5633 so that GDB will ignore it. */
5634 if (has_low_pc_attr
&& has_high_pc_attr
5635 && part_die
->lowpc
< part_die
->highpc
5636 && (part_die
->lowpc
!= 0
5637 || dwarf2_per_objfile
->has_section_at_zero
))
5638 part_die
->has_pc_info
= 1;
5642 /* Find a cached partial DIE at OFFSET in CU. */
5644 static struct partial_die_info
*
5645 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5647 struct partial_die_info
*lookup_die
= NULL
;
5648 struct partial_die_info part_die
;
5650 part_die
.offset
= offset
;
5651 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5656 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5658 static struct partial_die_info
*
5659 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5661 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5662 struct partial_die_info
*pd
= NULL
;
5664 if (offset
>= cu
->header
.offset
5665 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5667 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5672 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5674 if (per_cu
->cu
== NULL
)
5676 load_comp_unit (per_cu
, cu
->objfile
);
5677 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5678 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5681 per_cu
->cu
->last_used
= 0;
5682 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5684 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5686 struct cleanup
*back_to
;
5687 struct partial_die_info comp_unit_die
;
5688 struct abbrev_info
*abbrev
;
5689 unsigned int bytes_read
;
5692 per_cu
->load_all_dies
= 1;
5694 /* Re-read the DIEs. */
5695 back_to
= make_cleanup (null_cleanup
, 0);
5696 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
5698 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
5699 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
5701 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
5702 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
5703 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
5704 per_cu
->cu
->objfile
->obfd
, info_ptr
,
5706 if (comp_unit_die
.has_children
)
5707 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
5708 do_cleanups (back_to
);
5710 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5714 internal_error (__FILE__
, __LINE__
,
5715 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5716 offset
, bfd_get_filename (cu
->objfile
->obfd
));
5720 /* Adjust PART_DIE before generating a symbol for it. This function
5721 may set the is_external flag or change the DIE's name. */
5724 fixup_partial_die (struct partial_die_info
*part_die
,
5725 struct dwarf2_cu
*cu
)
5727 /* If we found a reference attribute and the DIE has no name, try
5728 to find a name in the referred to DIE. */
5730 if (part_die
->name
== NULL
&& part_die
->has_specification
)
5732 struct partial_die_info
*spec_die
;
5734 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
5736 fixup_partial_die (spec_die
, cu
);
5740 part_die
->name
= spec_die
->name
;
5742 /* Copy DW_AT_external attribute if it is set. */
5743 if (spec_die
->is_external
)
5744 part_die
->is_external
= spec_die
->is_external
;
5748 /* Set default names for some unnamed DIEs. */
5749 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
5750 || part_die
->tag
== DW_TAG_class_type
))
5751 part_die
->name
= "(anonymous class)";
5753 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
5754 part_die
->name
= "(anonymous namespace)";
5756 if (part_die
->tag
== DW_TAG_structure_type
5757 || part_die
->tag
== DW_TAG_class_type
5758 || part_die
->tag
== DW_TAG_union_type
)
5759 guess_structure_name (part_die
, cu
);
5762 /* Read the die from the .debug_info section buffer. Set DIEP to
5763 point to a newly allocated die with its information, except for its
5764 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5765 whether the die has children or not. */
5768 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
5769 struct dwarf2_cu
*cu
, int *has_children
)
5771 unsigned int abbrev_number
, bytes_read
, i
, offset
;
5772 struct abbrev_info
*abbrev
;
5773 struct die_info
*die
;
5775 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5776 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5777 info_ptr
+= bytes_read
;
5780 die
= dwarf_alloc_die ();
5782 die
->abbrev
= abbrev_number
;
5789 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
5792 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5794 bfd_get_filename (abfd
));
5796 die
= dwarf_alloc_die ();
5797 die
->offset
= offset
;
5798 die
->tag
= abbrev
->tag
;
5799 die
->abbrev
= abbrev_number
;
5802 die
->num_attrs
= abbrev
->num_attrs
;
5803 die
->attrs
= (struct attribute
*)
5804 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
5806 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5808 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
5809 abfd
, info_ptr
, cu
);
5811 /* If this attribute is an absolute reference to a different
5812 compilation unit, make sure that compilation unit is loaded
5814 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
5815 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
5816 || (DW_ADDR (&die
->attrs
[i
])
5817 >= cu
->header
.offset
+ cu
->header
.length
)))
5819 struct dwarf2_per_cu_data
*per_cu
;
5820 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
5823 /* Mark the dependence relation so that we don't flush PER_CU
5825 dwarf2_add_dependence (cu
, per_cu
);
5827 /* If it's already on the queue, we have nothing to do. */
5831 /* If the compilation unit is already loaded, just mark it as
5833 if (per_cu
->cu
!= NULL
)
5835 per_cu
->cu
->last_used
= 0;
5839 /* Add it to the queue. */
5840 queue_comp_unit (per_cu
);
5845 *has_children
= abbrev
->has_children
;
5849 /* Read an attribute value described by an attribute form. */
5852 read_attribute_value (struct attribute
*attr
, unsigned form
,
5853 bfd
*abfd
, gdb_byte
*info_ptr
,
5854 struct dwarf2_cu
*cu
)
5856 struct comp_unit_head
*cu_header
= &cu
->header
;
5857 unsigned int bytes_read
;
5858 struct dwarf_block
*blk
;
5864 case DW_FORM_ref_addr
:
5865 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
5866 info_ptr
+= bytes_read
;
5868 case DW_FORM_block2
:
5869 blk
= dwarf_alloc_block (cu
);
5870 blk
->size
= read_2_bytes (abfd
, info_ptr
);
5872 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5873 info_ptr
+= blk
->size
;
5874 DW_BLOCK (attr
) = blk
;
5876 case DW_FORM_block4
:
5877 blk
= dwarf_alloc_block (cu
);
5878 blk
->size
= read_4_bytes (abfd
, info_ptr
);
5880 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5881 info_ptr
+= blk
->size
;
5882 DW_BLOCK (attr
) = blk
;
5885 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
5889 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
5893 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
5896 case DW_FORM_string
:
5897 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
5898 info_ptr
+= bytes_read
;
5901 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
5903 info_ptr
+= bytes_read
;
5906 blk
= dwarf_alloc_block (cu
);
5907 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5908 info_ptr
+= bytes_read
;
5909 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5910 info_ptr
+= blk
->size
;
5911 DW_BLOCK (attr
) = blk
;
5913 case DW_FORM_block1
:
5914 blk
= dwarf_alloc_block (cu
);
5915 blk
->size
= read_1_byte (abfd
, info_ptr
);
5917 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5918 info_ptr
+= blk
->size
;
5919 DW_BLOCK (attr
) = blk
;
5922 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
5926 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
5930 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
5931 info_ptr
+= bytes_read
;
5934 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5935 info_ptr
+= bytes_read
;
5938 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
5942 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
5946 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
5950 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
5953 case DW_FORM_ref_udata
:
5954 DW_ADDR (attr
) = (cu
->header
.offset
5955 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
5956 info_ptr
+= bytes_read
;
5958 case DW_FORM_indirect
:
5959 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5960 info_ptr
+= bytes_read
;
5961 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
5964 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
5965 dwarf_form_name (form
),
5966 bfd_get_filename (abfd
));
5971 /* Read an attribute described by an abbreviated attribute. */
5974 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
5975 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5977 attr
->name
= abbrev
->name
;
5978 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
5981 /* read dwarf information from a buffer */
5984 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
5986 return bfd_get_8 (abfd
, buf
);
5990 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
5992 return bfd_get_signed_8 (abfd
, buf
);
5996 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
5998 return bfd_get_16 (abfd
, buf
);
6002 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6004 return bfd_get_signed_16 (abfd
, buf
);
6008 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6010 return bfd_get_32 (abfd
, buf
);
6014 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6016 return bfd_get_signed_32 (abfd
, buf
);
6019 static unsigned long
6020 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6022 return bfd_get_64 (abfd
, buf
);
6026 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6027 unsigned int *bytes_read
)
6029 struct comp_unit_head
*cu_header
= &cu
->header
;
6030 CORE_ADDR retval
= 0;
6032 if (cu_header
->signed_addr_p
)
6034 switch (cu_header
->addr_size
)
6037 retval
= bfd_get_signed_16 (abfd
, buf
);
6040 retval
= bfd_get_signed_32 (abfd
, buf
);
6043 retval
= bfd_get_signed_64 (abfd
, buf
);
6046 internal_error (__FILE__
, __LINE__
,
6047 _("read_address: bad switch, signed [in module %s]"),
6048 bfd_get_filename (abfd
));
6053 switch (cu_header
->addr_size
)
6056 retval
= bfd_get_16 (abfd
, buf
);
6059 retval
= bfd_get_32 (abfd
, buf
);
6062 retval
= bfd_get_64 (abfd
, buf
);
6065 internal_error (__FILE__
, __LINE__
,
6066 _("read_address: bad switch, unsigned [in module %s]"),
6067 bfd_get_filename (abfd
));
6071 *bytes_read
= cu_header
->addr_size
;
6075 /* Read the initial length from a section. The (draft) DWARF 3
6076 specification allows the initial length to take up either 4 bytes
6077 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6078 bytes describe the length and all offsets will be 8 bytes in length
6081 An older, non-standard 64-bit format is also handled by this
6082 function. The older format in question stores the initial length
6083 as an 8-byte quantity without an escape value. Lengths greater
6084 than 2^32 aren't very common which means that the initial 4 bytes
6085 is almost always zero. Since a length value of zero doesn't make
6086 sense for the 32-bit format, this initial zero can be considered to
6087 be an escape value which indicates the presence of the older 64-bit
6088 format. As written, the code can't detect (old format) lengths
6089 greater than 4GB. If it becomes necessary to handle lengths
6090 somewhat larger than 4GB, we could allow other small values (such
6091 as the non-sensical values of 1, 2, and 3) to also be used as
6092 escape values indicating the presence of the old format.
6094 The value returned via bytes_read should be used to increment the
6095 relevant pointer after calling read_initial_length().
6097 As a side effect, this function sets the fields initial_length_size
6098 and offset_size in cu_header to the values appropriate for the
6099 length field. (The format of the initial length field determines
6100 the width of file offsets to be fetched later with read_offset().)
6102 [ Note: read_initial_length() and read_offset() are based on the
6103 document entitled "DWARF Debugging Information Format", revision
6104 3, draft 8, dated November 19, 2001. This document was obtained
6107 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6109 This document is only a draft and is subject to change. (So beware.)
6111 Details regarding the older, non-standard 64-bit format were
6112 determined empirically by examining 64-bit ELF files produced by
6113 the SGI toolchain on an IRIX 6.5 machine.
6115 - Kevin, July 16, 2002
6119 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6120 unsigned int *bytes_read
)
6122 LONGEST length
= bfd_get_32 (abfd
, buf
);
6124 if (length
== 0xffffffff)
6126 length
= bfd_get_64 (abfd
, buf
+ 4);
6129 else if (length
== 0)
6131 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6132 length
= bfd_get_64 (abfd
, buf
);
6142 gdb_assert (cu_header
->initial_length_size
== 0
6143 || cu_header
->initial_length_size
== 4
6144 || cu_header
->initial_length_size
== 8
6145 || cu_header
->initial_length_size
== 12);
6147 if (cu_header
->initial_length_size
!= 0
6148 && cu_header
->initial_length_size
!= *bytes_read
)
6149 complaint (&symfile_complaints
,
6150 _("intermixed 32-bit and 64-bit DWARF sections"));
6152 cu_header
->initial_length_size
= *bytes_read
;
6153 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6159 /* Read an offset from the data stream. The size of the offset is
6160 given by cu_header->offset_size. */
6163 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6164 unsigned int *bytes_read
)
6168 switch (cu_header
->offset_size
)
6171 retval
= bfd_get_32 (abfd
, buf
);
6175 retval
= bfd_get_64 (abfd
, buf
);
6179 internal_error (__FILE__
, __LINE__
,
6180 _("read_offset: bad switch [in module %s]"),
6181 bfd_get_filename (abfd
));
6188 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6190 /* If the size of a host char is 8 bits, we can return a pointer
6191 to the buffer, otherwise we have to copy the data to a buffer
6192 allocated on the temporary obstack. */
6193 gdb_assert (HOST_CHAR_BIT
== 8);
6198 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6200 /* If the size of a host char is 8 bits, we can return a pointer
6201 to the string, otherwise we have to copy the string to a buffer
6202 allocated on the temporary obstack. */
6203 gdb_assert (HOST_CHAR_BIT
== 8);
6206 *bytes_read_ptr
= 1;
6209 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6210 return (char *) buf
;
6214 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6215 const struct comp_unit_head
*cu_header
,
6216 unsigned int *bytes_read_ptr
)
6218 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6221 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6223 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6224 bfd_get_filename (abfd
));
6227 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6229 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6230 bfd_get_filename (abfd
));
6233 gdb_assert (HOST_CHAR_BIT
== 8);
6234 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6236 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6239 static unsigned long
6240 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6242 unsigned long result
;
6243 unsigned int num_read
;
6253 byte
= bfd_get_8 (abfd
, buf
);
6256 result
|= ((unsigned long)(byte
& 127) << shift
);
6257 if ((byte
& 128) == 0)
6263 *bytes_read_ptr
= num_read
;
6268 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6271 int i
, shift
, num_read
;
6280 byte
= bfd_get_8 (abfd
, buf
);
6283 result
|= ((long)(byte
& 127) << shift
);
6285 if ((byte
& 128) == 0)
6290 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6291 result
|= -(((long)1) << shift
);
6292 *bytes_read_ptr
= num_read
;
6296 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6299 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6305 byte
= bfd_get_8 (abfd
, buf
);
6307 if ((byte
& 128) == 0)
6313 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6319 cu
->language
= language_c
;
6321 case DW_LANG_C_plus_plus
:
6322 cu
->language
= language_cplus
;
6324 case DW_LANG_Fortran77
:
6325 case DW_LANG_Fortran90
:
6326 case DW_LANG_Fortran95
:
6327 cu
->language
= language_fortran
;
6329 case DW_LANG_Mips_Assembler
:
6330 cu
->language
= language_asm
;
6333 cu
->language
= language_java
;
6337 cu
->language
= language_ada
;
6339 case DW_LANG_Modula2
:
6340 cu
->language
= language_m2
;
6342 case DW_LANG_Pascal83
:
6343 cu
->language
= language_pascal
;
6345 case DW_LANG_Cobol74
:
6346 case DW_LANG_Cobol85
:
6348 cu
->language
= language_minimal
;
6351 cu
->language_defn
= language_def (cu
->language
);
6354 /* Return the named attribute or NULL if not there. */
6356 static struct attribute
*
6357 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6360 struct attribute
*spec
= NULL
;
6362 for (i
= 0; i
< die
->num_attrs
; ++i
)
6364 if (die
->attrs
[i
].name
== name
)
6365 return &die
->attrs
[i
];
6366 if (die
->attrs
[i
].name
== DW_AT_specification
6367 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6368 spec
= &die
->attrs
[i
];
6372 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6377 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6378 and holds a non-zero value. This function should only be used for
6379 DW_FORM_flag attributes. */
6382 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6384 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6386 return (attr
&& DW_UNSND (attr
));
6390 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6392 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6393 which value is non-zero. However, we have to be careful with
6394 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6395 (via dwarf2_flag_true_p) follows this attribute. So we may
6396 end up accidently finding a declaration attribute that belongs
6397 to a different DIE referenced by the specification attribute,
6398 even though the given DIE does not have a declaration attribute. */
6399 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6400 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6403 /* Return the die giving the specification for DIE, if there is
6406 static struct die_info
*
6407 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6409 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6411 if (spec_attr
== NULL
)
6414 return follow_die_ref (die
, spec_attr
, cu
);
6417 /* Free the line_header structure *LH, and any arrays and strings it
6420 free_line_header (struct line_header
*lh
)
6422 if (lh
->standard_opcode_lengths
)
6423 xfree (lh
->standard_opcode_lengths
);
6425 /* Remember that all the lh->file_names[i].name pointers are
6426 pointers into debug_line_buffer, and don't need to be freed. */
6428 xfree (lh
->file_names
);
6430 /* Similarly for the include directory names. */
6431 if (lh
->include_dirs
)
6432 xfree (lh
->include_dirs
);
6438 /* Add an entry to LH's include directory table. */
6440 add_include_dir (struct line_header
*lh
, char *include_dir
)
6442 /* Grow the array if necessary. */
6443 if (lh
->include_dirs_size
== 0)
6445 lh
->include_dirs_size
= 1; /* for testing */
6446 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6447 * sizeof (*lh
->include_dirs
));
6449 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6451 lh
->include_dirs_size
*= 2;
6452 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6453 (lh
->include_dirs_size
6454 * sizeof (*lh
->include_dirs
)));
6457 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6461 /* Add an entry to LH's file name table. */
6463 add_file_name (struct line_header
*lh
,
6465 unsigned int dir_index
,
6466 unsigned int mod_time
,
6467 unsigned int length
)
6469 struct file_entry
*fe
;
6471 /* Grow the array if necessary. */
6472 if (lh
->file_names_size
== 0)
6474 lh
->file_names_size
= 1; /* for testing */
6475 lh
->file_names
= xmalloc (lh
->file_names_size
6476 * sizeof (*lh
->file_names
));
6478 else if (lh
->num_file_names
>= lh
->file_names_size
)
6480 lh
->file_names_size
*= 2;
6481 lh
->file_names
= xrealloc (lh
->file_names
,
6482 (lh
->file_names_size
6483 * sizeof (*lh
->file_names
)));
6486 fe
= &lh
->file_names
[lh
->num_file_names
++];
6488 fe
->dir_index
= dir_index
;
6489 fe
->mod_time
= mod_time
;
6490 fe
->length
= length
;
6496 /* Read the statement program header starting at OFFSET in
6497 .debug_line, according to the endianness of ABFD. Return a pointer
6498 to a struct line_header, allocated using xmalloc.
6500 NOTE: the strings in the include directory and file name tables of
6501 the returned object point into debug_line_buffer, and must not be
6503 static struct line_header
*
6504 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6505 struct dwarf2_cu
*cu
)
6507 struct cleanup
*back_to
;
6508 struct line_header
*lh
;
6510 unsigned int bytes_read
;
6512 char *cur_dir
, *cur_file
;
6514 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6516 complaint (&symfile_complaints
, _("missing .debug_line section"));
6520 /* Make sure that at least there's room for the total_length field.
6521 That could be 12 bytes long, but we're just going to fudge that. */
6522 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6524 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6528 lh
= xmalloc (sizeof (*lh
));
6529 memset (lh
, 0, sizeof (*lh
));
6530 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6533 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6535 /* Read in the header. */
6537 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6538 line_ptr
+= bytes_read
;
6539 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6540 + dwarf2_per_objfile
->line_size
))
6542 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6545 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6546 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6548 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6549 line_ptr
+= bytes_read
;
6550 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6552 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6554 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6556 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6558 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6560 lh
->standard_opcode_lengths
6561 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6563 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6564 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6566 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6570 /* Read directory table. */
6571 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6573 line_ptr
+= bytes_read
;
6574 add_include_dir (lh
, cur_dir
);
6576 line_ptr
+= bytes_read
;
6578 /* Read file name table. */
6579 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6581 unsigned int dir_index
, mod_time
, length
;
6583 line_ptr
+= bytes_read
;
6584 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6585 line_ptr
+= bytes_read
;
6586 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6587 line_ptr
+= bytes_read
;
6588 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6589 line_ptr
+= bytes_read
;
6591 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6593 line_ptr
+= bytes_read
;
6594 lh
->statement_program_start
= line_ptr
;
6596 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6597 + dwarf2_per_objfile
->line_size
))
6598 complaint (&symfile_complaints
,
6599 _("line number info header doesn't fit in `.debug_line' section"));
6601 discard_cleanups (back_to
);
6605 /* This function exists to work around a bug in certain compilers
6606 (particularly GCC 2.95), in which the first line number marker of a
6607 function does not show up until after the prologue, right before
6608 the second line number marker. This function shifts ADDRESS down
6609 to the beginning of the function if necessary, and is called on
6610 addresses passed to record_line. */
6613 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6615 struct function_range
*fn
;
6617 /* Find the function_range containing address. */
6622 cu
->cached_fn
= cu
->first_fn
;
6626 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6632 while (fn
&& fn
!= cu
->cached_fn
)
6633 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6643 if (address
!= fn
->lowpc
)
6644 complaint (&symfile_complaints
,
6645 _("misplaced first line number at 0x%lx for '%s'"),
6646 (unsigned long) address
, fn
->name
);
6651 /* Decode the Line Number Program (LNP) for the given line_header
6652 structure and CU. The actual information extracted and the type
6653 of structures created from the LNP depends on the value of PST.
6655 1. If PST is NULL, then this procedure uses the data from the program
6656 to create all necessary symbol tables, and their linetables.
6657 The compilation directory of the file is passed in COMP_DIR,
6658 and must not be NULL.
6660 2. If PST is not NULL, this procedure reads the program to determine
6661 the list of files included by the unit represented by PST, and
6662 builds all the associated partial symbol tables. In this case,
6663 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6664 is not used to compute the full name of the symtab, and therefore
6665 omitting it when building the partial symtab does not introduce
6666 the potential for inconsistency - a partial symtab and its associated
6667 symbtab having a different fullname -). */
6670 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6671 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6675 unsigned int bytes_read
;
6676 unsigned char op_code
, extended_op
, adj_opcode
;
6678 struct objfile
*objfile
= cu
->objfile
;
6679 const int decode_for_pst_p
= (pst
!= NULL
);
6680 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6682 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6684 line_ptr
= lh
->statement_program_start
;
6685 line_end
= lh
->statement_program_end
;
6687 /* Read the statement sequences until there's nothing left. */
6688 while (line_ptr
< line_end
)
6690 /* state machine registers */
6691 CORE_ADDR address
= 0;
6692 unsigned int file
= 1;
6693 unsigned int line
= 1;
6694 unsigned int column
= 0;
6695 int is_stmt
= lh
->default_is_stmt
;
6696 int basic_block
= 0;
6697 int end_sequence
= 0;
6699 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
6701 /* Start a subfile for the current file of the state machine. */
6702 /* lh->include_dirs and lh->file_names are 0-based, but the
6703 directory and file name numbers in the statement program
6705 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
6709 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6711 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6714 /* Decode the table. */
6715 while (!end_sequence
)
6717 op_code
= read_1_byte (abfd
, line_ptr
);
6720 if (op_code
>= lh
->opcode_base
)
6722 /* Special operand. */
6723 adj_opcode
= op_code
- lh
->opcode_base
;
6724 address
+= (adj_opcode
/ lh
->line_range
)
6725 * lh
->minimum_instruction_length
;
6726 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
6727 if (lh
->num_file_names
< file
)
6728 dwarf2_debug_line_missing_file_complaint ();
6731 lh
->file_names
[file
- 1].included_p
= 1;
6732 if (!decode_for_pst_p
)
6734 if (last_subfile
!= current_subfile
)
6737 record_line (last_subfile
, 0, address
);
6738 last_subfile
= current_subfile
;
6740 /* Append row to matrix using current values. */
6741 record_line (current_subfile
, line
,
6742 check_cu_functions (address
, cu
));
6747 else switch (op_code
)
6749 case DW_LNS_extended_op
:
6750 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6751 line_ptr
+= bytes_read
;
6752 extended_op
= read_1_byte (abfd
, line_ptr
);
6754 switch (extended_op
)
6756 case DW_LNE_end_sequence
:
6759 if (lh
->num_file_names
< file
)
6760 dwarf2_debug_line_missing_file_complaint ();
6763 lh
->file_names
[file
- 1].included_p
= 1;
6764 if (!decode_for_pst_p
)
6765 record_line (current_subfile
, 0, address
);
6768 case DW_LNE_set_address
:
6769 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
6770 line_ptr
+= bytes_read
;
6771 address
+= baseaddr
;
6773 case DW_LNE_define_file
:
6776 unsigned int dir_index
, mod_time
, length
;
6778 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
6779 line_ptr
+= bytes_read
;
6781 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6782 line_ptr
+= bytes_read
;
6784 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6785 line_ptr
+= bytes_read
;
6787 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6788 line_ptr
+= bytes_read
;
6789 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6793 complaint (&symfile_complaints
,
6794 _("mangled .debug_line section"));
6799 if (lh
->num_file_names
< file
)
6800 dwarf2_debug_line_missing_file_complaint ();
6803 lh
->file_names
[file
- 1].included_p
= 1;
6804 if (!decode_for_pst_p
)
6806 if (last_subfile
!= current_subfile
)
6809 record_line (last_subfile
, 0, address
);
6810 last_subfile
= current_subfile
;
6812 record_line (current_subfile
, line
,
6813 check_cu_functions (address
, cu
));
6818 case DW_LNS_advance_pc
:
6819 address
+= lh
->minimum_instruction_length
6820 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6821 line_ptr
+= bytes_read
;
6823 case DW_LNS_advance_line
:
6824 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
6825 line_ptr
+= bytes_read
;
6827 case DW_LNS_set_file
:
6829 /* The arrays lh->include_dirs and lh->file_names are
6830 0-based, but the directory and file name numbers in
6831 the statement program are 1-based. */
6832 struct file_entry
*fe
;
6835 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6836 line_ptr
+= bytes_read
;
6837 if (lh
->num_file_names
< file
)
6838 dwarf2_debug_line_missing_file_complaint ();
6841 fe
= &lh
->file_names
[file
- 1];
6843 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6844 if (!decode_for_pst_p
)
6846 last_subfile
= current_subfile
;
6847 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6852 case DW_LNS_set_column
:
6853 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6854 line_ptr
+= bytes_read
;
6856 case DW_LNS_negate_stmt
:
6857 is_stmt
= (!is_stmt
);
6859 case DW_LNS_set_basic_block
:
6862 /* Add to the address register of the state machine the
6863 address increment value corresponding to special opcode
6864 255. I.e., this value is scaled by the minimum
6865 instruction length since special opcode 255 would have
6866 scaled the the increment. */
6867 case DW_LNS_const_add_pc
:
6868 address
+= (lh
->minimum_instruction_length
6869 * ((255 - lh
->opcode_base
) / lh
->line_range
));
6871 case DW_LNS_fixed_advance_pc
:
6872 address
+= read_2_bytes (abfd
, line_ptr
);
6877 /* Unknown standard opcode, ignore it. */
6880 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
6882 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6883 line_ptr
+= bytes_read
;
6890 if (decode_for_pst_p
)
6894 /* Now that we're done scanning the Line Header Program, we can
6895 create the psymtab of each included file. */
6896 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
6897 if (lh
->file_names
[file_index
].included_p
== 1)
6899 const struct file_entry fe
= lh
->file_names
[file_index
];
6900 char *include_name
= fe
.name
;
6901 char *dir_name
= NULL
;
6902 char *pst_filename
= pst
->filename
;
6905 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
6907 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
6909 include_name
= concat (dir_name
, SLASH_STRING
,
6910 include_name
, (char *)NULL
);
6911 make_cleanup (xfree
, include_name
);
6914 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
6916 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
6917 pst_filename
, (char *)NULL
);
6918 make_cleanup (xfree
, pst_filename
);
6921 if (strcmp (include_name
, pst_filename
) != 0)
6922 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
6927 /* Make sure a symtab is created for every file, even files
6928 which contain only variables (i.e. no code with associated
6932 struct file_entry
*fe
;
6934 for (i
= 0; i
< lh
->num_file_names
; i
++)
6937 fe
= &lh
->file_names
[i
];
6939 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6940 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6942 /* Skip the main file; we don't need it, and it must be
6943 allocated last, so that it will show up before the
6944 non-primary symtabs in the objfile's symtab list. */
6945 if (current_subfile
== first_subfile
)
6948 if (current_subfile
->symtab
== NULL
)
6949 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
6951 fe
->symtab
= current_subfile
->symtab
;
6956 /* Start a subfile for DWARF. FILENAME is the name of the file and
6957 DIRNAME the name of the source directory which contains FILENAME
6958 or NULL if not known. COMP_DIR is the compilation directory for the
6959 linetable's compilation unit or NULL if not known.
6960 This routine tries to keep line numbers from identical absolute and
6961 relative file names in a common subfile.
6963 Using the `list' example from the GDB testsuite, which resides in
6964 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
6965 of /srcdir/list0.c yields the following debugging information for list0.c:
6967 DW_AT_name: /srcdir/list0.c
6968 DW_AT_comp_dir: /compdir
6969 files.files[0].name: list0.h
6970 files.files[0].dir: /srcdir
6971 files.files[1].name: list0.c
6972 files.files[1].dir: /srcdir
6974 The line number information for list0.c has to end up in a single
6975 subfile, so that `break /srcdir/list0.c:1' works as expected.
6976 start_subfile will ensure that this happens provided that we pass the
6977 concatenation of files.files[1].dir and files.files[1].name as the
6981 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
6985 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
6986 `start_symtab' will always pass the contents of DW_AT_comp_dir as
6987 second argument to start_subfile. To be consistent, we do the
6988 same here. In order not to lose the line information directory,
6989 we concatenate it to the filename when it makes sense.
6990 Note that the Dwarf3 standard says (speaking of filenames in line
6991 information): ``The directory index is ignored for file names
6992 that represent full path names''. Thus ignoring dirname in the
6993 `else' branch below isn't an issue. */
6995 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
6996 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
6998 fullname
= filename
;
7000 start_subfile (fullname
, comp_dir
);
7002 if (fullname
!= filename
)
7007 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7008 struct dwarf2_cu
*cu
)
7010 struct objfile
*objfile
= cu
->objfile
;
7011 struct comp_unit_head
*cu_header
= &cu
->header
;
7013 /* NOTE drow/2003-01-30: There used to be a comment and some special
7014 code here to turn a symbol with DW_AT_external and a
7015 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7016 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7017 with some versions of binutils) where shared libraries could have
7018 relocations against symbols in their debug information - the
7019 minimal symbol would have the right address, but the debug info
7020 would not. It's no longer necessary, because we will explicitly
7021 apply relocations when we read in the debug information now. */
7023 /* A DW_AT_location attribute with no contents indicates that a
7024 variable has been optimized away. */
7025 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7027 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7031 /* Handle one degenerate form of location expression specially, to
7032 preserve GDB's previous behavior when section offsets are
7033 specified. If this is just a DW_OP_addr then mark this symbol
7036 if (attr_form_is_block (attr
)
7037 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7038 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7042 SYMBOL_VALUE_ADDRESS (sym
) =
7043 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7044 fixup_symbol_section (sym
, objfile
);
7045 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7046 SYMBOL_SECTION (sym
));
7047 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7051 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7052 expression evaluator, and use LOC_COMPUTED only when necessary
7053 (i.e. when the value of a register or memory location is
7054 referenced, or a thread-local block, etc.). Then again, it might
7055 not be worthwhile. I'm assuming that it isn't unless performance
7056 or memory numbers show me otherwise. */
7058 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7059 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7062 /* Given a pointer to a DWARF information entry, figure out if we need
7063 to make a symbol table entry for it, and if so, create a new entry
7064 and return a pointer to it.
7065 If TYPE is NULL, determine symbol type from the die, otherwise
7066 used the passed type. */
7068 static struct symbol
*
7069 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7071 struct objfile
*objfile
= cu
->objfile
;
7072 struct symbol
*sym
= NULL
;
7074 struct attribute
*attr
= NULL
;
7075 struct attribute
*attr2
= NULL
;
7078 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7080 if (die
->tag
!= DW_TAG_namespace
)
7081 name
= dwarf2_linkage_name (die
, cu
);
7083 name
= TYPE_NAME (type
);
7087 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7088 sizeof (struct symbol
));
7089 OBJSTAT (objfile
, n_syms
++);
7090 memset (sym
, 0, sizeof (struct symbol
));
7092 /* Cache this symbol's name and the name's demangled form (if any). */
7093 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7094 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7096 /* Default assumptions.
7097 Use the passed type or decode it from the die. */
7098 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7099 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7101 SYMBOL_TYPE (sym
) = type
;
7103 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7104 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7107 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7110 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7113 int file_index
= DW_UNSND (attr
);
7114 if (cu
->line_header
== NULL
7115 || file_index
> cu
->line_header
->num_file_names
)
7116 complaint (&symfile_complaints
,
7117 _("file index out of range"));
7118 else if (file_index
> 0)
7120 struct file_entry
*fe
;
7121 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7122 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7129 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7132 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7134 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7136 case DW_TAG_subprogram
:
7137 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7139 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7140 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7141 if (attr2
&& (DW_UNSND (attr2
) != 0))
7143 add_symbol_to_list (sym
, &global_symbols
);
7147 add_symbol_to_list (sym
, cu
->list_in_scope
);
7150 case DW_TAG_variable
:
7151 /* Compilation with minimal debug info may result in variables
7152 with missing type entries. Change the misleading `void' type
7153 to something sensible. */
7154 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7155 SYMBOL_TYPE (sym
) = init_type (TYPE_CODE_INT
,
7156 gdbarch_int_bit (current_gdbarch
)
7158 0, "<variable, no debug info>",
7160 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7163 dwarf2_const_value (attr
, sym
, cu
);
7164 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7165 if (attr2
&& (DW_UNSND (attr2
) != 0))
7166 add_symbol_to_list (sym
, &global_symbols
);
7168 add_symbol_to_list (sym
, cu
->list_in_scope
);
7171 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7174 var_decode_location (attr
, sym
, cu
);
7175 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7176 if (attr2
&& (DW_UNSND (attr2
) != 0))
7177 add_symbol_to_list (sym
, &global_symbols
);
7179 add_symbol_to_list (sym
, cu
->list_in_scope
);
7183 /* We do not know the address of this symbol.
7184 If it is an external symbol and we have type information
7185 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7186 The address of the variable will then be determined from
7187 the minimal symbol table whenever the variable is
7189 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7190 if (attr2
&& (DW_UNSND (attr2
) != 0)
7191 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7193 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7194 add_symbol_to_list (sym
, &global_symbols
);
7198 case DW_TAG_formal_parameter
:
7199 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7202 var_decode_location (attr
, sym
, cu
);
7203 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7204 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
7205 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
7207 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7210 dwarf2_const_value (attr
, sym
, cu
);
7212 add_symbol_to_list (sym
, cu
->list_in_scope
);
7214 case DW_TAG_unspecified_parameters
:
7215 /* From varargs functions; gdb doesn't seem to have any
7216 interest in this information, so just ignore it for now.
7219 case DW_TAG_class_type
:
7220 case DW_TAG_structure_type
:
7221 case DW_TAG_union_type
:
7222 case DW_TAG_set_type
:
7223 case DW_TAG_enumeration_type
:
7224 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7225 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7227 /* Make sure that the symbol includes appropriate enclosing
7228 classes/namespaces in its name. These are calculated in
7229 read_structure_type, and the correct name is saved in
7232 if (cu
->language
== language_cplus
7233 || cu
->language
== language_java
)
7235 struct type
*type
= SYMBOL_TYPE (sym
);
7237 if (TYPE_TAG_NAME (type
) != NULL
)
7239 /* FIXME: carlton/2003-11-10: Should this use
7240 SYMBOL_SET_NAMES instead? (The same problem also
7241 arises further down in this function.) */
7242 /* The type's name is already allocated along with
7243 this objfile, so we don't need to duplicate it
7245 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7250 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7251 really ever be static objects: otherwise, if you try
7252 to, say, break of a class's method and you're in a file
7253 which doesn't mention that class, it won't work unless
7254 the check for all static symbols in lookup_symbol_aux
7255 saves you. See the OtherFileClass tests in
7256 gdb.c++/namespace.exp. */
7258 struct pending
**list_to_add
;
7260 list_to_add
= (cu
->list_in_scope
== &file_symbols
7261 && (cu
->language
== language_cplus
7262 || cu
->language
== language_java
)
7263 ? &global_symbols
: cu
->list_in_scope
);
7265 add_symbol_to_list (sym
, list_to_add
);
7267 /* The semantics of C++ state that "struct foo { ... }" also
7268 defines a typedef for "foo". A Java class declaration also
7269 defines a typedef for the class. Synthesize a typedef symbol
7270 so that "ptype foo" works as expected. */
7271 if (cu
->language
== language_cplus
7272 || cu
->language
== language_java
7273 || cu
->language
== language_ada
)
7275 struct symbol
*typedef_sym
= (struct symbol
*)
7276 obstack_alloc (&objfile
->objfile_obstack
,
7277 sizeof (struct symbol
));
7278 *typedef_sym
= *sym
;
7279 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
7280 /* The symbol's name is already allocated along with
7281 this objfile, so we don't need to duplicate it for
7283 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7284 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7285 add_symbol_to_list (typedef_sym
, list_to_add
);
7289 case DW_TAG_typedef
:
7290 if (processing_has_namespace_info
7291 && processing_current_prefix
[0] != '\0')
7293 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7294 processing_current_prefix
,
7297 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7298 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7299 add_symbol_to_list (sym
, cu
->list_in_scope
);
7301 case DW_TAG_base_type
:
7302 case DW_TAG_subrange_type
:
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_enumerator
:
7308 if (processing_has_namespace_info
7309 && processing_current_prefix
[0] != '\0')
7311 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7312 processing_current_prefix
,
7315 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7318 dwarf2_const_value (attr
, sym
, cu
);
7321 /* NOTE: carlton/2003-11-10: See comment above in the
7322 DW_TAG_class_type, etc. block. */
7324 struct pending
**list_to_add
;
7326 list_to_add
= (cu
->list_in_scope
== &file_symbols
7327 && (cu
->language
== language_cplus
7328 || cu
->language
== language_java
)
7329 ? &global_symbols
: cu
->list_in_scope
);
7331 add_symbol_to_list (sym
, list_to_add
);
7334 case DW_TAG_namespace
:
7335 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7336 add_symbol_to_list (sym
, &global_symbols
);
7339 /* Not a tag we recognize. Hopefully we aren't processing
7340 trash data, but since we must specifically ignore things
7341 we don't recognize, there is nothing else we should do at
7343 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7344 dwarf_tag_name (die
->tag
));
7351 /* Copy constant value from an attribute to a symbol. */
7354 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7355 struct dwarf2_cu
*cu
)
7357 struct objfile
*objfile
= cu
->objfile
;
7358 struct comp_unit_head
*cu_header
= &cu
->header
;
7359 struct dwarf_block
*blk
;
7364 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7365 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7366 cu_header
->addr_size
,
7367 TYPE_LENGTH (SYMBOL_TYPE
7369 SYMBOL_VALUE_BYTES (sym
) =
7370 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7371 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7372 it's body - store_unsigned_integer. */
7373 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7375 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7377 case DW_FORM_block1
:
7378 case DW_FORM_block2
:
7379 case DW_FORM_block4
:
7381 blk
= DW_BLOCK (attr
);
7382 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7383 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7385 TYPE_LENGTH (SYMBOL_TYPE
7387 SYMBOL_VALUE_BYTES (sym
) =
7388 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7389 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7390 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7393 /* The DW_AT_const_value attributes are supposed to carry the
7394 symbol's value "represented as it would be on the target
7395 architecture." By the time we get here, it's already been
7396 converted to host endianness, so we just need to sign- or
7397 zero-extend it as appropriate. */
7399 dwarf2_const_value_data (attr
, sym
, 8);
7402 dwarf2_const_value_data (attr
, sym
, 16);
7405 dwarf2_const_value_data (attr
, sym
, 32);
7408 dwarf2_const_value_data (attr
, sym
, 64);
7412 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7413 SYMBOL_CLASS (sym
) = LOC_CONST
;
7417 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7418 SYMBOL_CLASS (sym
) = LOC_CONST
;
7422 complaint (&symfile_complaints
,
7423 _("unsupported const value attribute form: '%s'"),
7424 dwarf_form_name (attr
->form
));
7425 SYMBOL_VALUE (sym
) = 0;
7426 SYMBOL_CLASS (sym
) = LOC_CONST
;
7432 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7433 or zero-extend it as appropriate for the symbol's type. */
7435 dwarf2_const_value_data (struct attribute
*attr
,
7439 LONGEST l
= DW_UNSND (attr
);
7441 if (bits
< sizeof (l
) * 8)
7443 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7444 l
&= ((LONGEST
) 1 << bits
) - 1;
7446 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7449 SYMBOL_VALUE (sym
) = l
;
7450 SYMBOL_CLASS (sym
) = LOC_CONST
;
7454 /* Return the type of the die in question using its DW_AT_type attribute. */
7456 static struct type
*
7457 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7460 struct attribute
*type_attr
;
7461 struct die_info
*type_die
;
7463 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7466 /* A missing DW_AT_type represents a void type. */
7467 return dwarf2_fundamental_type (cu
->objfile
, FT_VOID
, cu
);
7470 type_die
= follow_die_ref (die
, type_attr
, cu
);
7472 type
= tag_type_to_type (type_die
, cu
);
7475 dump_die (type_die
);
7476 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7482 /* Return the containing type of the die in question using its
7483 DW_AT_containing_type attribute. */
7485 static struct type
*
7486 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7488 struct type
*type
= NULL
;
7489 struct attribute
*type_attr
;
7490 struct die_info
*type_die
= NULL
;
7492 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7495 type_die
= follow_die_ref (die
, type_attr
, cu
);
7496 type
= tag_type_to_type (type_die
, cu
);
7501 dump_die (type_die
);
7502 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7508 static struct type
*
7509 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7517 read_type_die (die
, cu
);
7521 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7529 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7531 char *prefix
= determine_prefix (die
, cu
);
7532 const char *old_prefix
= processing_current_prefix
;
7533 struct cleanup
*back_to
= make_cleanup (xfree
, prefix
);
7534 processing_current_prefix
= prefix
;
7538 case DW_TAG_class_type
:
7539 case DW_TAG_structure_type
:
7540 case DW_TAG_union_type
:
7541 read_structure_type (die
, cu
);
7543 case DW_TAG_enumeration_type
:
7544 read_enumeration_type (die
, cu
);
7546 case DW_TAG_subprogram
:
7547 case DW_TAG_subroutine_type
:
7548 read_subroutine_type (die
, cu
);
7550 case DW_TAG_array_type
:
7551 read_array_type (die
, cu
);
7553 case DW_TAG_set_type
:
7554 read_set_type (die
, cu
);
7556 case DW_TAG_pointer_type
:
7557 read_tag_pointer_type (die
, cu
);
7559 case DW_TAG_ptr_to_member_type
:
7560 read_tag_ptr_to_member_type (die
, cu
);
7562 case DW_TAG_reference_type
:
7563 read_tag_reference_type (die
, cu
);
7565 case DW_TAG_const_type
:
7566 read_tag_const_type (die
, cu
);
7568 case DW_TAG_volatile_type
:
7569 read_tag_volatile_type (die
, cu
);
7571 case DW_TAG_string_type
:
7572 read_tag_string_type (die
, cu
);
7574 case DW_TAG_typedef
:
7575 read_typedef (die
, cu
);
7577 case DW_TAG_subrange_type
:
7578 read_subrange_type (die
, cu
);
7580 case DW_TAG_base_type
:
7581 read_base_type (die
, cu
);
7583 case DW_TAG_unspecified_type
:
7584 read_unspecified_type (die
, cu
);
7587 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7588 dwarf_tag_name (die
->tag
));
7592 processing_current_prefix
= old_prefix
;
7593 do_cleanups (back_to
);
7596 /* Return the name of the namespace/class that DIE is defined within,
7597 or "" if we can't tell. The caller should xfree the result. */
7599 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7600 therein) for an example of how to use this function to deal with
7601 DW_AT_specification. */
7604 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7606 struct die_info
*parent
;
7608 if (cu
->language
!= language_cplus
7609 && cu
->language
!= language_java
)
7612 parent
= die
->parent
;
7616 return xstrdup ("");
7620 switch (parent
->tag
) {
7621 case DW_TAG_namespace
:
7623 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7624 before doing this check? */
7625 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7627 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7632 char *parent_prefix
= determine_prefix (parent
, cu
);
7633 char *retval
= typename_concat (NULL
, parent_prefix
,
7634 namespace_name (parent
, &dummy
,
7637 xfree (parent_prefix
);
7642 case DW_TAG_class_type
:
7643 case DW_TAG_structure_type
:
7645 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7647 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7651 const char *old_prefix
= processing_current_prefix
;
7652 char *new_prefix
= determine_prefix (parent
, cu
);
7655 processing_current_prefix
= new_prefix
;
7656 retval
= determine_class_name (parent
, cu
);
7657 processing_current_prefix
= old_prefix
;
7664 return determine_prefix (parent
, cu
);
7669 /* Return a newly-allocated string formed by concatenating PREFIX and
7670 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7671 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7672 perform an obconcat, otherwise allocate storage for the result. The CU argument
7673 is used to determine the language and hence, the appropriate separator. */
7675 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7678 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
7679 struct dwarf2_cu
*cu
)
7683 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
7685 else if (cu
->language
== language_java
)
7692 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
7697 strcpy (retval
, prefix
);
7698 strcat (retval
, sep
);
7701 strcat (retval
, suffix
);
7707 /* We have an obstack. */
7708 return obconcat (obs
, prefix
, sep
, suffix
);
7712 static struct type
*
7713 dwarf_base_type (int encoding
, int size
, struct dwarf2_cu
*cu
)
7715 struct objfile
*objfile
= cu
->objfile
;
7717 /* FIXME - this should not produce a new (struct type *)
7718 every time. It should cache base types. */
7722 case DW_ATE_address
:
7723 type
= dwarf2_fundamental_type (objfile
, FT_VOID
, cu
);
7725 case DW_ATE_boolean
:
7726 type
= dwarf2_fundamental_type (objfile
, FT_BOOLEAN
, cu
);
7728 case DW_ATE_complex_float
:
7731 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_COMPLEX
, cu
);
7735 type
= dwarf2_fundamental_type (objfile
, FT_COMPLEX
, cu
);
7741 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
, cu
);
7745 type
= dwarf2_fundamental_type (objfile
, FT_FLOAT
, cu
);
7752 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
, cu
);
7755 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_SHORT
, cu
);
7759 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
, cu
);
7763 case DW_ATE_signed_char
:
7764 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
, cu
);
7766 case DW_ATE_unsigned
:
7770 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
, cu
);
7773 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_SHORT
, cu
);
7777 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_INTEGER
, cu
);
7781 case DW_ATE_unsigned_char
:
7782 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
, cu
);
7785 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
, cu
);
7792 copy_die (struct die_info
*old_die
)
7794 struct die_info
*new_die
;
7797 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
7798 memset (new_die
, 0, sizeof (struct die_info
));
7800 new_die
->tag
= old_die
->tag
;
7801 new_die
->has_children
= old_die
->has_children
;
7802 new_die
->abbrev
= old_die
->abbrev
;
7803 new_die
->offset
= old_die
->offset
;
7804 new_die
->type
= NULL
;
7806 num_attrs
= old_die
->num_attrs
;
7807 new_die
->num_attrs
= num_attrs
;
7808 new_die
->attrs
= (struct attribute
*)
7809 xmalloc (num_attrs
* sizeof (struct attribute
));
7811 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
7813 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
7814 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
7815 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
7818 new_die
->next
= NULL
;
7823 /* Return sibling of die, NULL if no sibling. */
7825 static struct die_info
*
7826 sibling_die (struct die_info
*die
)
7828 return die
->sibling
;
7831 /* Get linkage name of a die, return NULL if not found. */
7834 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7836 struct attribute
*attr
;
7838 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7839 if (attr
&& DW_STRING (attr
))
7840 return DW_STRING (attr
);
7841 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7842 if (attr
&& DW_STRING (attr
))
7843 return DW_STRING (attr
);
7847 /* Get name of a die, return NULL if not found. */
7850 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7852 struct attribute
*attr
;
7854 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7855 if (attr
&& DW_STRING (attr
))
7856 return DW_STRING (attr
);
7860 /* Return the die that this die in an extension of, or NULL if there
7863 static struct die_info
*
7864 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
7866 struct attribute
*attr
;
7868 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
7872 return follow_die_ref (die
, attr
, cu
);
7875 /* Convert a DIE tag into its string name. */
7878 dwarf_tag_name (unsigned tag
)
7882 case DW_TAG_padding
:
7883 return "DW_TAG_padding";
7884 case DW_TAG_array_type
:
7885 return "DW_TAG_array_type";
7886 case DW_TAG_class_type
:
7887 return "DW_TAG_class_type";
7888 case DW_TAG_entry_point
:
7889 return "DW_TAG_entry_point";
7890 case DW_TAG_enumeration_type
:
7891 return "DW_TAG_enumeration_type";
7892 case DW_TAG_formal_parameter
:
7893 return "DW_TAG_formal_parameter";
7894 case DW_TAG_imported_declaration
:
7895 return "DW_TAG_imported_declaration";
7897 return "DW_TAG_label";
7898 case DW_TAG_lexical_block
:
7899 return "DW_TAG_lexical_block";
7901 return "DW_TAG_member";
7902 case DW_TAG_pointer_type
:
7903 return "DW_TAG_pointer_type";
7904 case DW_TAG_reference_type
:
7905 return "DW_TAG_reference_type";
7906 case DW_TAG_compile_unit
:
7907 return "DW_TAG_compile_unit";
7908 case DW_TAG_string_type
:
7909 return "DW_TAG_string_type";
7910 case DW_TAG_structure_type
:
7911 return "DW_TAG_structure_type";
7912 case DW_TAG_subroutine_type
:
7913 return "DW_TAG_subroutine_type";
7914 case DW_TAG_typedef
:
7915 return "DW_TAG_typedef";
7916 case DW_TAG_union_type
:
7917 return "DW_TAG_union_type";
7918 case DW_TAG_unspecified_parameters
:
7919 return "DW_TAG_unspecified_parameters";
7920 case DW_TAG_variant
:
7921 return "DW_TAG_variant";
7922 case DW_TAG_common_block
:
7923 return "DW_TAG_common_block";
7924 case DW_TAG_common_inclusion
:
7925 return "DW_TAG_common_inclusion";
7926 case DW_TAG_inheritance
:
7927 return "DW_TAG_inheritance";
7928 case DW_TAG_inlined_subroutine
:
7929 return "DW_TAG_inlined_subroutine";
7931 return "DW_TAG_module";
7932 case DW_TAG_ptr_to_member_type
:
7933 return "DW_TAG_ptr_to_member_type";
7934 case DW_TAG_set_type
:
7935 return "DW_TAG_set_type";
7936 case DW_TAG_subrange_type
:
7937 return "DW_TAG_subrange_type";
7938 case DW_TAG_with_stmt
:
7939 return "DW_TAG_with_stmt";
7940 case DW_TAG_access_declaration
:
7941 return "DW_TAG_access_declaration";
7942 case DW_TAG_base_type
:
7943 return "DW_TAG_base_type";
7944 case DW_TAG_catch_block
:
7945 return "DW_TAG_catch_block";
7946 case DW_TAG_const_type
:
7947 return "DW_TAG_const_type";
7948 case DW_TAG_constant
:
7949 return "DW_TAG_constant";
7950 case DW_TAG_enumerator
:
7951 return "DW_TAG_enumerator";
7952 case DW_TAG_file_type
:
7953 return "DW_TAG_file_type";
7955 return "DW_TAG_friend";
7956 case DW_TAG_namelist
:
7957 return "DW_TAG_namelist";
7958 case DW_TAG_namelist_item
:
7959 return "DW_TAG_namelist_item";
7960 case DW_TAG_packed_type
:
7961 return "DW_TAG_packed_type";
7962 case DW_TAG_subprogram
:
7963 return "DW_TAG_subprogram";
7964 case DW_TAG_template_type_param
:
7965 return "DW_TAG_template_type_param";
7966 case DW_TAG_template_value_param
:
7967 return "DW_TAG_template_value_param";
7968 case DW_TAG_thrown_type
:
7969 return "DW_TAG_thrown_type";
7970 case DW_TAG_try_block
:
7971 return "DW_TAG_try_block";
7972 case DW_TAG_variant_part
:
7973 return "DW_TAG_variant_part";
7974 case DW_TAG_variable
:
7975 return "DW_TAG_variable";
7976 case DW_TAG_volatile_type
:
7977 return "DW_TAG_volatile_type";
7978 case DW_TAG_dwarf_procedure
:
7979 return "DW_TAG_dwarf_procedure";
7980 case DW_TAG_restrict_type
:
7981 return "DW_TAG_restrict_type";
7982 case DW_TAG_interface_type
:
7983 return "DW_TAG_interface_type";
7984 case DW_TAG_namespace
:
7985 return "DW_TAG_namespace";
7986 case DW_TAG_imported_module
:
7987 return "DW_TAG_imported_module";
7988 case DW_TAG_unspecified_type
:
7989 return "DW_TAG_unspecified_type";
7990 case DW_TAG_partial_unit
:
7991 return "DW_TAG_partial_unit";
7992 case DW_TAG_imported_unit
:
7993 return "DW_TAG_imported_unit";
7994 case DW_TAG_condition
:
7995 return "DW_TAG_condition";
7996 case DW_TAG_shared_type
:
7997 return "DW_TAG_shared_type";
7998 case DW_TAG_MIPS_loop
:
7999 return "DW_TAG_MIPS_loop";
8000 case DW_TAG_HP_array_descriptor
:
8001 return "DW_TAG_HP_array_descriptor";
8002 case DW_TAG_format_label
:
8003 return "DW_TAG_format_label";
8004 case DW_TAG_function_template
:
8005 return "DW_TAG_function_template";
8006 case DW_TAG_class_template
:
8007 return "DW_TAG_class_template";
8008 case DW_TAG_GNU_BINCL
:
8009 return "DW_TAG_GNU_BINCL";
8010 case DW_TAG_GNU_EINCL
:
8011 return "DW_TAG_GNU_EINCL";
8012 case DW_TAG_upc_shared_type
:
8013 return "DW_TAG_upc_shared_type";
8014 case DW_TAG_upc_strict_type
:
8015 return "DW_TAG_upc_strict_type";
8016 case DW_TAG_upc_relaxed_type
:
8017 return "DW_TAG_upc_relaxed_type";
8018 case DW_TAG_PGI_kanji_type
:
8019 return "DW_TAG_PGI_kanji_type";
8020 case DW_TAG_PGI_interface_block
:
8021 return "DW_TAG_PGI_interface_block";
8023 return "DW_TAG_<unknown>";
8027 /* Convert a DWARF attribute code into its string name. */
8030 dwarf_attr_name (unsigned attr
)
8035 return "DW_AT_sibling";
8036 case DW_AT_location
:
8037 return "DW_AT_location";
8039 return "DW_AT_name";
8040 case DW_AT_ordering
:
8041 return "DW_AT_ordering";
8042 case DW_AT_subscr_data
:
8043 return "DW_AT_subscr_data";
8044 case DW_AT_byte_size
:
8045 return "DW_AT_byte_size";
8046 case DW_AT_bit_offset
:
8047 return "DW_AT_bit_offset";
8048 case DW_AT_bit_size
:
8049 return "DW_AT_bit_size";
8050 case DW_AT_element_list
:
8051 return "DW_AT_element_list";
8052 case DW_AT_stmt_list
:
8053 return "DW_AT_stmt_list";
8055 return "DW_AT_low_pc";
8057 return "DW_AT_high_pc";
8058 case DW_AT_language
:
8059 return "DW_AT_language";
8061 return "DW_AT_member";
8063 return "DW_AT_discr";
8064 case DW_AT_discr_value
:
8065 return "DW_AT_discr_value";
8066 case DW_AT_visibility
:
8067 return "DW_AT_visibility";
8069 return "DW_AT_import";
8070 case DW_AT_string_length
:
8071 return "DW_AT_string_length";
8072 case DW_AT_common_reference
:
8073 return "DW_AT_common_reference";
8074 case DW_AT_comp_dir
:
8075 return "DW_AT_comp_dir";
8076 case DW_AT_const_value
:
8077 return "DW_AT_const_value";
8078 case DW_AT_containing_type
:
8079 return "DW_AT_containing_type";
8080 case DW_AT_default_value
:
8081 return "DW_AT_default_value";
8083 return "DW_AT_inline";
8084 case DW_AT_is_optional
:
8085 return "DW_AT_is_optional";
8086 case DW_AT_lower_bound
:
8087 return "DW_AT_lower_bound";
8088 case DW_AT_producer
:
8089 return "DW_AT_producer";
8090 case DW_AT_prototyped
:
8091 return "DW_AT_prototyped";
8092 case DW_AT_return_addr
:
8093 return "DW_AT_return_addr";
8094 case DW_AT_start_scope
:
8095 return "DW_AT_start_scope";
8096 case DW_AT_stride_size
:
8097 return "DW_AT_stride_size";
8098 case DW_AT_upper_bound
:
8099 return "DW_AT_upper_bound";
8100 case DW_AT_abstract_origin
:
8101 return "DW_AT_abstract_origin";
8102 case DW_AT_accessibility
:
8103 return "DW_AT_accessibility";
8104 case DW_AT_address_class
:
8105 return "DW_AT_address_class";
8106 case DW_AT_artificial
:
8107 return "DW_AT_artificial";
8108 case DW_AT_base_types
:
8109 return "DW_AT_base_types";
8110 case DW_AT_calling_convention
:
8111 return "DW_AT_calling_convention";
8113 return "DW_AT_count";
8114 case DW_AT_data_member_location
:
8115 return "DW_AT_data_member_location";
8116 case DW_AT_decl_column
:
8117 return "DW_AT_decl_column";
8118 case DW_AT_decl_file
:
8119 return "DW_AT_decl_file";
8120 case DW_AT_decl_line
:
8121 return "DW_AT_decl_line";
8122 case DW_AT_declaration
:
8123 return "DW_AT_declaration";
8124 case DW_AT_discr_list
:
8125 return "DW_AT_discr_list";
8126 case DW_AT_encoding
:
8127 return "DW_AT_encoding";
8128 case DW_AT_external
:
8129 return "DW_AT_external";
8130 case DW_AT_frame_base
:
8131 return "DW_AT_frame_base";
8133 return "DW_AT_friend";
8134 case DW_AT_identifier_case
:
8135 return "DW_AT_identifier_case";
8136 case DW_AT_macro_info
:
8137 return "DW_AT_macro_info";
8138 case DW_AT_namelist_items
:
8139 return "DW_AT_namelist_items";
8140 case DW_AT_priority
:
8141 return "DW_AT_priority";
8143 return "DW_AT_segment";
8144 case DW_AT_specification
:
8145 return "DW_AT_specification";
8146 case DW_AT_static_link
:
8147 return "DW_AT_static_link";
8149 return "DW_AT_type";
8150 case DW_AT_use_location
:
8151 return "DW_AT_use_location";
8152 case DW_AT_variable_parameter
:
8153 return "DW_AT_variable_parameter";
8154 case DW_AT_virtuality
:
8155 return "DW_AT_virtuality";
8156 case DW_AT_vtable_elem_location
:
8157 return "DW_AT_vtable_elem_location";
8158 /* DWARF 3 values. */
8159 case DW_AT_allocated
:
8160 return "DW_AT_allocated";
8161 case DW_AT_associated
:
8162 return "DW_AT_associated";
8163 case DW_AT_data_location
:
8164 return "DW_AT_data_location";
8166 return "DW_AT_stride";
8167 case DW_AT_entry_pc
:
8168 return "DW_AT_entry_pc";
8169 case DW_AT_use_UTF8
:
8170 return "DW_AT_use_UTF8";
8171 case DW_AT_extension
:
8172 return "DW_AT_extension";
8174 return "DW_AT_ranges";
8175 case DW_AT_trampoline
:
8176 return "DW_AT_trampoline";
8177 case DW_AT_call_column
:
8178 return "DW_AT_call_column";
8179 case DW_AT_call_file
:
8180 return "DW_AT_call_file";
8181 case DW_AT_call_line
:
8182 return "DW_AT_call_line";
8183 case DW_AT_description
:
8184 return "DW_AT_description";
8185 case DW_AT_binary_scale
:
8186 return "DW_AT_binary_scale";
8187 case DW_AT_decimal_scale
:
8188 return "DW_AT_decimal_scale";
8190 return "DW_AT_small";
8191 case DW_AT_decimal_sign
:
8192 return "DW_AT_decimal_sign";
8193 case DW_AT_digit_count
:
8194 return "DW_AT_digit_count";
8195 case DW_AT_picture_string
:
8196 return "DW_AT_picture_string";
8198 return "DW_AT_mutable";
8199 case DW_AT_threads_scaled
:
8200 return "DW_AT_threads_scaled";
8201 case DW_AT_explicit
:
8202 return "DW_AT_explicit";
8203 case DW_AT_object_pointer
:
8204 return "DW_AT_object_pointer";
8205 case DW_AT_endianity
:
8206 return "DW_AT_endianity";
8207 case DW_AT_elemental
:
8208 return "DW_AT_elemental";
8210 return "DW_AT_pure";
8211 case DW_AT_recursive
:
8212 return "DW_AT_recursive";
8214 /* SGI/MIPS extensions. */
8215 case DW_AT_MIPS_fde
:
8216 return "DW_AT_MIPS_fde";
8217 case DW_AT_MIPS_loop_begin
:
8218 return "DW_AT_MIPS_loop_begin";
8219 case DW_AT_MIPS_tail_loop_begin
:
8220 return "DW_AT_MIPS_tail_loop_begin";
8221 case DW_AT_MIPS_epilog_begin
:
8222 return "DW_AT_MIPS_epilog_begin";
8223 case DW_AT_MIPS_loop_unroll_factor
:
8224 return "DW_AT_MIPS_loop_unroll_factor";
8225 case DW_AT_MIPS_software_pipeline_depth
:
8226 return "DW_AT_MIPS_software_pipeline_depth";
8227 case DW_AT_MIPS_linkage_name
:
8228 return "DW_AT_MIPS_linkage_name";
8229 case DW_AT_MIPS_stride
:
8230 return "DW_AT_MIPS_stride";
8231 case DW_AT_MIPS_abstract_name
:
8232 return "DW_AT_MIPS_abstract_name";
8233 case DW_AT_MIPS_clone_origin
:
8234 return "DW_AT_MIPS_clone_origin";
8235 case DW_AT_MIPS_has_inlines
:
8236 return "DW_AT_MIPS_has_inlines";
8238 /* HP extensions. */
8239 case DW_AT_HP_block_index
:
8240 return "DW_AT_HP_block_index";
8241 case DW_AT_HP_unmodifiable
:
8242 return "DW_AT_HP_unmodifiable";
8243 case DW_AT_HP_actuals_stmt_list
:
8244 return "DW_AT_HP_actuals_stmt_list";
8245 case DW_AT_HP_proc_per_section
:
8246 return "DW_AT_HP_proc_per_section";
8247 case DW_AT_HP_raw_data_ptr
:
8248 return "DW_AT_HP_raw_data_ptr";
8249 case DW_AT_HP_pass_by_reference
:
8250 return "DW_AT_HP_pass_by_reference";
8251 case DW_AT_HP_opt_level
:
8252 return "DW_AT_HP_opt_level";
8253 case DW_AT_HP_prof_version_id
:
8254 return "DW_AT_HP_prof_version_id";
8255 case DW_AT_HP_opt_flags
:
8256 return "DW_AT_HP_opt_flags";
8257 case DW_AT_HP_cold_region_low_pc
:
8258 return "DW_AT_HP_cold_region_low_pc";
8259 case DW_AT_HP_cold_region_high_pc
:
8260 return "DW_AT_HP_cold_region_high_pc";
8261 case DW_AT_HP_all_variables_modifiable
:
8262 return "DW_AT_HP_all_variables_modifiable";
8263 case DW_AT_HP_linkage_name
:
8264 return "DW_AT_HP_linkage_name";
8265 case DW_AT_HP_prof_flags
:
8266 return "DW_AT_HP_prof_flags";
8267 /* GNU extensions. */
8268 case DW_AT_sf_names
:
8269 return "DW_AT_sf_names";
8270 case DW_AT_src_info
:
8271 return "DW_AT_src_info";
8272 case DW_AT_mac_info
:
8273 return "DW_AT_mac_info";
8274 case DW_AT_src_coords
:
8275 return "DW_AT_src_coords";
8276 case DW_AT_body_begin
:
8277 return "DW_AT_body_begin";
8278 case DW_AT_body_end
:
8279 return "DW_AT_body_end";
8280 case DW_AT_GNU_vector
:
8281 return "DW_AT_GNU_vector";
8282 /* VMS extensions. */
8283 case DW_AT_VMS_rtnbeg_pd_address
:
8284 return "DW_AT_VMS_rtnbeg_pd_address";
8285 /* UPC extension. */
8286 case DW_AT_upc_threads_scaled
:
8287 return "DW_AT_upc_threads_scaled";
8288 /* PGI (STMicroelectronics) extensions. */
8289 case DW_AT_PGI_lbase
:
8290 return "DW_AT_PGI_lbase";
8291 case DW_AT_PGI_soffset
:
8292 return "DW_AT_PGI_soffset";
8293 case DW_AT_PGI_lstride
:
8294 return "DW_AT_PGI_lstride";
8296 return "DW_AT_<unknown>";
8300 /* Convert a DWARF value form code into its string name. */
8303 dwarf_form_name (unsigned form
)
8308 return "DW_FORM_addr";
8309 case DW_FORM_block2
:
8310 return "DW_FORM_block2";
8311 case DW_FORM_block4
:
8312 return "DW_FORM_block4";
8314 return "DW_FORM_data2";
8316 return "DW_FORM_data4";
8318 return "DW_FORM_data8";
8319 case DW_FORM_string
:
8320 return "DW_FORM_string";
8322 return "DW_FORM_block";
8323 case DW_FORM_block1
:
8324 return "DW_FORM_block1";
8326 return "DW_FORM_data1";
8328 return "DW_FORM_flag";
8330 return "DW_FORM_sdata";
8332 return "DW_FORM_strp";
8334 return "DW_FORM_udata";
8335 case DW_FORM_ref_addr
:
8336 return "DW_FORM_ref_addr";
8338 return "DW_FORM_ref1";
8340 return "DW_FORM_ref2";
8342 return "DW_FORM_ref4";
8344 return "DW_FORM_ref8";
8345 case DW_FORM_ref_udata
:
8346 return "DW_FORM_ref_udata";
8347 case DW_FORM_indirect
:
8348 return "DW_FORM_indirect";
8350 return "DW_FORM_<unknown>";
8354 /* Convert a DWARF stack opcode into its string name. */
8357 dwarf_stack_op_name (unsigned op
)
8362 return "DW_OP_addr";
8364 return "DW_OP_deref";
8366 return "DW_OP_const1u";
8368 return "DW_OP_const1s";
8370 return "DW_OP_const2u";
8372 return "DW_OP_const2s";
8374 return "DW_OP_const4u";
8376 return "DW_OP_const4s";
8378 return "DW_OP_const8u";
8380 return "DW_OP_const8s";
8382 return "DW_OP_constu";
8384 return "DW_OP_consts";
8388 return "DW_OP_drop";
8390 return "DW_OP_over";
8392 return "DW_OP_pick";
8394 return "DW_OP_swap";
8398 return "DW_OP_xderef";
8406 return "DW_OP_minus";
8418 return "DW_OP_plus";
8419 case DW_OP_plus_uconst
:
8420 return "DW_OP_plus_uconst";
8426 return "DW_OP_shra";
8444 return "DW_OP_skip";
8446 return "DW_OP_lit0";
8448 return "DW_OP_lit1";
8450 return "DW_OP_lit2";
8452 return "DW_OP_lit3";
8454 return "DW_OP_lit4";
8456 return "DW_OP_lit5";
8458 return "DW_OP_lit6";
8460 return "DW_OP_lit7";
8462 return "DW_OP_lit8";
8464 return "DW_OP_lit9";
8466 return "DW_OP_lit10";
8468 return "DW_OP_lit11";
8470 return "DW_OP_lit12";
8472 return "DW_OP_lit13";
8474 return "DW_OP_lit14";
8476 return "DW_OP_lit15";
8478 return "DW_OP_lit16";
8480 return "DW_OP_lit17";
8482 return "DW_OP_lit18";
8484 return "DW_OP_lit19";
8486 return "DW_OP_lit20";
8488 return "DW_OP_lit21";
8490 return "DW_OP_lit22";
8492 return "DW_OP_lit23";
8494 return "DW_OP_lit24";
8496 return "DW_OP_lit25";
8498 return "DW_OP_lit26";
8500 return "DW_OP_lit27";
8502 return "DW_OP_lit28";
8504 return "DW_OP_lit29";
8506 return "DW_OP_lit30";
8508 return "DW_OP_lit31";
8510 return "DW_OP_reg0";
8512 return "DW_OP_reg1";
8514 return "DW_OP_reg2";
8516 return "DW_OP_reg3";
8518 return "DW_OP_reg4";
8520 return "DW_OP_reg5";
8522 return "DW_OP_reg6";
8524 return "DW_OP_reg7";
8526 return "DW_OP_reg8";
8528 return "DW_OP_reg9";
8530 return "DW_OP_reg10";
8532 return "DW_OP_reg11";
8534 return "DW_OP_reg12";
8536 return "DW_OP_reg13";
8538 return "DW_OP_reg14";
8540 return "DW_OP_reg15";
8542 return "DW_OP_reg16";
8544 return "DW_OP_reg17";
8546 return "DW_OP_reg18";
8548 return "DW_OP_reg19";
8550 return "DW_OP_reg20";
8552 return "DW_OP_reg21";
8554 return "DW_OP_reg22";
8556 return "DW_OP_reg23";
8558 return "DW_OP_reg24";
8560 return "DW_OP_reg25";
8562 return "DW_OP_reg26";
8564 return "DW_OP_reg27";
8566 return "DW_OP_reg28";
8568 return "DW_OP_reg29";
8570 return "DW_OP_reg30";
8572 return "DW_OP_reg31";
8574 return "DW_OP_breg0";
8576 return "DW_OP_breg1";
8578 return "DW_OP_breg2";
8580 return "DW_OP_breg3";
8582 return "DW_OP_breg4";
8584 return "DW_OP_breg5";
8586 return "DW_OP_breg6";
8588 return "DW_OP_breg7";
8590 return "DW_OP_breg8";
8592 return "DW_OP_breg9";
8594 return "DW_OP_breg10";
8596 return "DW_OP_breg11";
8598 return "DW_OP_breg12";
8600 return "DW_OP_breg13";
8602 return "DW_OP_breg14";
8604 return "DW_OP_breg15";
8606 return "DW_OP_breg16";
8608 return "DW_OP_breg17";
8610 return "DW_OP_breg18";
8612 return "DW_OP_breg19";
8614 return "DW_OP_breg20";
8616 return "DW_OP_breg21";
8618 return "DW_OP_breg22";
8620 return "DW_OP_breg23";
8622 return "DW_OP_breg24";
8624 return "DW_OP_breg25";
8626 return "DW_OP_breg26";
8628 return "DW_OP_breg27";
8630 return "DW_OP_breg28";
8632 return "DW_OP_breg29";
8634 return "DW_OP_breg30";
8636 return "DW_OP_breg31";
8638 return "DW_OP_regx";
8640 return "DW_OP_fbreg";
8642 return "DW_OP_bregx";
8644 return "DW_OP_piece";
8645 case DW_OP_deref_size
:
8646 return "DW_OP_deref_size";
8647 case DW_OP_xderef_size
:
8648 return "DW_OP_xderef_size";
8651 /* DWARF 3 extensions. */
8652 case DW_OP_push_object_address
:
8653 return "DW_OP_push_object_address";
8655 return "DW_OP_call2";
8657 return "DW_OP_call4";
8658 case DW_OP_call_ref
:
8659 return "DW_OP_call_ref";
8660 /* GNU extensions. */
8661 case DW_OP_form_tls_address
:
8662 return "DW_OP_form_tls_address";
8663 case DW_OP_call_frame_cfa
:
8664 return "DW_OP_call_frame_cfa";
8665 case DW_OP_bit_piece
:
8666 return "DW_OP_bit_piece";
8667 case DW_OP_GNU_push_tls_address
:
8668 return "DW_OP_GNU_push_tls_address";
8669 case DW_OP_GNU_uninit
:
8670 return "DW_OP_GNU_uninit";
8671 /* HP extensions. */
8672 case DW_OP_HP_is_value
:
8673 return "DW_OP_HP_is_value";
8674 case DW_OP_HP_fltconst4
:
8675 return "DW_OP_HP_fltconst4";
8676 case DW_OP_HP_fltconst8
:
8677 return "DW_OP_HP_fltconst8";
8678 case DW_OP_HP_mod_range
:
8679 return "DW_OP_HP_mod_range";
8680 case DW_OP_HP_unmod_range
:
8681 return "DW_OP_HP_unmod_range";
8683 return "DW_OP_HP_tls";
8685 return "OP_<unknown>";
8690 dwarf_bool_name (unsigned mybool
)
8698 /* Convert a DWARF type code into its string name. */
8701 dwarf_type_encoding_name (unsigned enc
)
8706 return "DW_ATE_void";
8707 case DW_ATE_address
:
8708 return "DW_ATE_address";
8709 case DW_ATE_boolean
:
8710 return "DW_ATE_boolean";
8711 case DW_ATE_complex_float
:
8712 return "DW_ATE_complex_float";
8714 return "DW_ATE_float";
8716 return "DW_ATE_signed";
8717 case DW_ATE_signed_char
:
8718 return "DW_ATE_signed_char";
8719 case DW_ATE_unsigned
:
8720 return "DW_ATE_unsigned";
8721 case DW_ATE_unsigned_char
:
8722 return "DW_ATE_unsigned_char";
8724 case DW_ATE_imaginary_float
:
8725 return "DW_ATE_imaginary_float";
8726 case DW_ATE_packed_decimal
:
8727 return "DW_ATE_packed_decimal";
8728 case DW_ATE_numeric_string
:
8729 return "DW_ATE_numeric_string";
8731 return "DW_ATE_edited";
8732 case DW_ATE_signed_fixed
:
8733 return "DW_ATE_signed_fixed";
8734 case DW_ATE_unsigned_fixed
:
8735 return "DW_ATE_unsigned_fixed";
8736 case DW_ATE_decimal_float
:
8737 return "DW_ATE_decimal_float";
8738 /* HP extensions. */
8739 case DW_ATE_HP_float80
:
8740 return "DW_ATE_HP_float80";
8741 case DW_ATE_HP_complex_float80
:
8742 return "DW_ATE_HP_complex_float80";
8743 case DW_ATE_HP_float128
:
8744 return "DW_ATE_HP_float128";
8745 case DW_ATE_HP_complex_float128
:
8746 return "DW_ATE_HP_complex_float128";
8747 case DW_ATE_HP_floathpintel
:
8748 return "DW_ATE_HP_floathpintel";
8749 case DW_ATE_HP_imaginary_float80
:
8750 return "DW_ATE_HP_imaginary_float80";
8751 case DW_ATE_HP_imaginary_float128
:
8752 return "DW_ATE_HP_imaginary_float128";
8754 return "DW_ATE_<unknown>";
8758 /* Convert a DWARF call frame info operation to its string name. */
8762 dwarf_cfi_name (unsigned cfi_opc
)
8766 case DW_CFA_advance_loc
:
8767 return "DW_CFA_advance_loc";
8769 return "DW_CFA_offset";
8770 case DW_CFA_restore
:
8771 return "DW_CFA_restore";
8773 return "DW_CFA_nop";
8774 case DW_CFA_set_loc
:
8775 return "DW_CFA_set_loc";
8776 case DW_CFA_advance_loc1
:
8777 return "DW_CFA_advance_loc1";
8778 case DW_CFA_advance_loc2
:
8779 return "DW_CFA_advance_loc2";
8780 case DW_CFA_advance_loc4
:
8781 return "DW_CFA_advance_loc4";
8782 case DW_CFA_offset_extended
:
8783 return "DW_CFA_offset_extended";
8784 case DW_CFA_restore_extended
:
8785 return "DW_CFA_restore_extended";
8786 case DW_CFA_undefined
:
8787 return "DW_CFA_undefined";
8788 case DW_CFA_same_value
:
8789 return "DW_CFA_same_value";
8790 case DW_CFA_register
:
8791 return "DW_CFA_register";
8792 case DW_CFA_remember_state
:
8793 return "DW_CFA_remember_state";
8794 case DW_CFA_restore_state
:
8795 return "DW_CFA_restore_state";
8796 case DW_CFA_def_cfa
:
8797 return "DW_CFA_def_cfa";
8798 case DW_CFA_def_cfa_register
:
8799 return "DW_CFA_def_cfa_register";
8800 case DW_CFA_def_cfa_offset
:
8801 return "DW_CFA_def_cfa_offset";
8803 case DW_CFA_def_cfa_expression
:
8804 return "DW_CFA_def_cfa_expression";
8805 case DW_CFA_expression
:
8806 return "DW_CFA_expression";
8807 case DW_CFA_offset_extended_sf
:
8808 return "DW_CFA_offset_extended_sf";
8809 case DW_CFA_def_cfa_sf
:
8810 return "DW_CFA_def_cfa_sf";
8811 case DW_CFA_def_cfa_offset_sf
:
8812 return "DW_CFA_def_cfa_offset_sf";
8813 case DW_CFA_val_offset
:
8814 return "DW_CFA_val_offset";
8815 case DW_CFA_val_offset_sf
:
8816 return "DW_CFA_val_offset_sf";
8817 case DW_CFA_val_expression
:
8818 return "DW_CFA_val_expression";
8819 /* SGI/MIPS specific. */
8820 case DW_CFA_MIPS_advance_loc8
:
8821 return "DW_CFA_MIPS_advance_loc8";
8822 /* GNU extensions. */
8823 case DW_CFA_GNU_window_save
:
8824 return "DW_CFA_GNU_window_save";
8825 case DW_CFA_GNU_args_size
:
8826 return "DW_CFA_GNU_args_size";
8827 case DW_CFA_GNU_negative_offset_extended
:
8828 return "DW_CFA_GNU_negative_offset_extended";
8830 return "DW_CFA_<unknown>";
8836 dump_die (struct die_info
*die
)
8840 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
8841 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
8842 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
8843 dwarf_bool_name (die
->child
!= NULL
));
8845 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
8846 for (i
= 0; i
< die
->num_attrs
; ++i
)
8848 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
8849 dwarf_attr_name (die
->attrs
[i
].name
),
8850 dwarf_form_name (die
->attrs
[i
].form
));
8851 switch (die
->attrs
[i
].form
)
8853 case DW_FORM_ref_addr
:
8855 fprintf_unfiltered (gdb_stderr
, "address: ");
8856 deprecated_print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
8858 case DW_FORM_block2
:
8859 case DW_FORM_block4
:
8861 case DW_FORM_block1
:
8862 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
8867 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
8868 (long) (DW_ADDR (&die
->attrs
[i
])));
8876 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
8878 case DW_FORM_string
:
8880 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
8881 DW_STRING (&die
->attrs
[i
])
8882 ? DW_STRING (&die
->attrs
[i
]) : "");
8885 if (DW_UNSND (&die
->attrs
[i
]))
8886 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
8888 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
8890 case DW_FORM_indirect
:
8891 /* the reader will have reduced the indirect form to
8892 the "base form" so this form should not occur */
8893 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
8896 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
8897 die
->attrs
[i
].form
);
8899 fprintf_unfiltered (gdb_stderr
, "\n");
8904 dump_die_list (struct die_info
*die
)
8909 if (die
->child
!= NULL
)
8910 dump_die_list (die
->child
);
8911 if (die
->sibling
!= NULL
)
8912 dump_die_list (die
->sibling
);
8917 store_in_ref_table (unsigned int offset
, struct die_info
*die
,
8918 struct dwarf2_cu
*cu
)
8921 struct die_info
*old
;
8923 h
= (offset
% REF_HASH_SIZE
);
8924 old
= cu
->die_ref_table
[h
];
8925 die
->next_ref
= old
;
8926 cu
->die_ref_table
[h
] = die
;
8930 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
8932 unsigned int result
= 0;
8936 case DW_FORM_ref_addr
:
8941 case DW_FORM_ref_udata
:
8942 result
= DW_ADDR (attr
);
8945 complaint (&symfile_complaints
,
8946 _("unsupported die ref attribute form: '%s'"),
8947 dwarf_form_name (attr
->form
));
8952 /* Return the constant value held by the given attribute. Return -1
8953 if the value held by the attribute is not constant. */
8956 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
8958 if (attr
->form
== DW_FORM_sdata
)
8959 return DW_SND (attr
);
8960 else if (attr
->form
== DW_FORM_udata
8961 || attr
->form
== DW_FORM_data1
8962 || attr
->form
== DW_FORM_data2
8963 || attr
->form
== DW_FORM_data4
8964 || attr
->form
== DW_FORM_data8
)
8965 return DW_UNSND (attr
);
8968 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
8969 dwarf_form_name (attr
->form
));
8970 return default_value
;
8974 static struct die_info
*
8975 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
8976 struct dwarf2_cu
*cu
)
8978 struct die_info
*die
;
8979 unsigned int offset
;
8981 struct die_info temp_die
;
8982 struct dwarf2_cu
*target_cu
;
8984 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
8986 if (DW_ADDR (attr
) < cu
->header
.offset
8987 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
8989 struct dwarf2_per_cu_data
*per_cu
;
8990 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
8992 target_cu
= per_cu
->cu
;
8997 h
= (offset
% REF_HASH_SIZE
);
8998 die
= target_cu
->die_ref_table
[h
];
9001 if (die
->offset
== offset
)
9003 die
= die
->next_ref
;
9006 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9007 "at 0x%lx [in module %s]"),
9008 (long) src_die
->offset
, (long) offset
, cu
->objfile
->name
);
9013 static struct type
*
9014 dwarf2_fundamental_type (struct objfile
*objfile
, int typeid,
9015 struct dwarf2_cu
*cu
)
9017 if (typeid < 0 || typeid >= FT_NUM_MEMBERS
)
9019 error (_("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]"),
9020 typeid, objfile
->name
);
9023 /* Look for this particular type in the fundamental type vector. If
9024 one is not found, create and install one appropriate for the
9025 current language and the current target machine. */
9027 if (cu
->ftypes
[typeid] == NULL
)
9029 cu
->ftypes
[typeid] = cu
->language_defn
->la_fund_type (objfile
, typeid);
9032 return (cu
->ftypes
[typeid]);
9035 /* Decode simple location descriptions.
9036 Given a pointer to a dwarf block that defines a location, compute
9037 the location and return the value.
9039 NOTE drow/2003-11-18: This function is called in two situations
9040 now: for the address of static or global variables (partial symbols
9041 only) and for offsets into structures which are expected to be
9042 (more or less) constant. The partial symbol case should go away,
9043 and only the constant case should remain. That will let this
9044 function complain more accurately. A few special modes are allowed
9045 without complaint for global variables (for instance, global
9046 register values and thread-local values).
9048 A location description containing no operations indicates that the
9049 object is optimized out. The return value is 0 for that case.
9050 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9051 callers will only want a very basic result and this can become a
9054 Note that stack[0] is unused except as a default error return.
9055 Note that stack overflow is not yet handled. */
9058 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9060 struct objfile
*objfile
= cu
->objfile
;
9061 struct comp_unit_head
*cu_header
= &cu
->header
;
9063 int size
= blk
->size
;
9064 gdb_byte
*data
= blk
->data
;
9065 CORE_ADDR stack
[64];
9067 unsigned int bytes_read
, unsnd
;
9111 stack
[++stacki
] = op
- DW_OP_lit0
;
9146 stack
[++stacki
] = op
- DW_OP_reg0
;
9148 dwarf2_complex_location_expr_complaint ();
9152 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9154 stack
[++stacki
] = unsnd
;
9156 dwarf2_complex_location_expr_complaint ();
9160 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9166 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9171 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9176 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9181 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9186 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9191 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9196 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9202 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9207 stack
[stacki
+ 1] = stack
[stacki
];
9212 stack
[stacki
- 1] += stack
[stacki
];
9216 case DW_OP_plus_uconst
:
9217 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9222 stack
[stacki
- 1] -= stack
[stacki
];
9227 /* If we're not the last op, then we definitely can't encode
9228 this using GDB's address_class enum. This is valid for partial
9229 global symbols, although the variable's address will be bogus
9232 dwarf2_complex_location_expr_complaint ();
9235 case DW_OP_GNU_push_tls_address
:
9236 /* The top of the stack has the offset from the beginning
9237 of the thread control block at which the variable is located. */
9238 /* Nothing should follow this operator, so the top of stack would
9240 /* This is valid for partial global symbols, but the variable's
9241 address will be bogus in the psymtab. */
9243 dwarf2_complex_location_expr_complaint ();
9246 case DW_OP_GNU_uninit
:
9250 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9251 dwarf_stack_op_name (op
));
9252 return (stack
[stacki
]);
9255 return (stack
[stacki
]);
9258 /* memory allocation interface */
9260 static struct dwarf_block
*
9261 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9263 struct dwarf_block
*blk
;
9265 blk
= (struct dwarf_block
*)
9266 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9270 static struct abbrev_info
*
9271 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9273 struct abbrev_info
*abbrev
;
9275 abbrev
= (struct abbrev_info
*)
9276 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9277 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9281 static struct die_info
*
9282 dwarf_alloc_die (void)
9284 struct die_info
*die
;
9286 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
9287 memset (die
, 0, sizeof (struct die_info
));
9292 /* Macro support. */
9295 /* Return the full name of file number I in *LH's file name table.
9296 Use COMP_DIR as the name of the current directory of the
9297 compilation. The result is allocated using xmalloc; the caller is
9298 responsible for freeing it. */
9300 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9302 /* Is the file number a valid index into the line header's file name
9303 table? Remember that file numbers start with one, not zero. */
9304 if (1 <= file
&& file
<= lh
->num_file_names
)
9306 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9308 if (IS_ABSOLUTE_PATH (fe
->name
))
9309 return xstrdup (fe
->name
);
9317 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9323 dir_len
= strlen (dir
);
9324 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9325 strcpy (full_name
, dir
);
9326 full_name
[dir_len
] = '/';
9327 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9331 return xstrdup (fe
->name
);
9336 /* The compiler produced a bogus file number. We can at least
9337 record the macro definitions made in the file, even if we
9338 won't be able to find the file by name. */
9340 sprintf (fake_name
, "<bad macro file number %d>", file
);
9342 complaint (&symfile_complaints
,
9343 _("bad file number in macro information (%d)"),
9346 return xstrdup (fake_name
);
9351 static struct macro_source_file
*
9352 macro_start_file (int file
, int line
,
9353 struct macro_source_file
*current_file
,
9354 const char *comp_dir
,
9355 struct line_header
*lh
, struct objfile
*objfile
)
9357 /* The full name of this source file. */
9358 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9360 /* We don't create a macro table for this compilation unit
9361 at all until we actually get a filename. */
9362 if (! pending_macros
)
9363 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9364 objfile
->macro_cache
);
9367 /* If we have no current file, then this must be the start_file
9368 directive for the compilation unit's main source file. */
9369 current_file
= macro_set_main (pending_macros
, full_name
);
9371 current_file
= macro_include (current_file
, line
, full_name
);
9375 return current_file
;
9379 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9380 followed by a null byte. */
9382 copy_string (const char *buf
, int len
)
9384 char *s
= xmalloc (len
+ 1);
9385 memcpy (s
, buf
, len
);
9393 consume_improper_spaces (const char *p
, const char *body
)
9397 complaint (&symfile_complaints
,
9398 _("macro definition contains spaces in formal argument list:\n`%s'"),
9410 parse_macro_definition (struct macro_source_file
*file
, int line
,
9415 /* The body string takes one of two forms. For object-like macro
9416 definitions, it should be:
9418 <macro name> " " <definition>
9420 For function-like macro definitions, it should be:
9422 <macro name> "() " <definition>
9424 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9426 Spaces may appear only where explicitly indicated, and in the
9429 The Dwarf 2 spec says that an object-like macro's name is always
9430 followed by a space, but versions of GCC around March 2002 omit
9431 the space when the macro's definition is the empty string.
9433 The Dwarf 2 spec says that there should be no spaces between the
9434 formal arguments in a function-like macro's formal argument list,
9435 but versions of GCC around March 2002 include spaces after the
9439 /* Find the extent of the macro name. The macro name is terminated
9440 by either a space or null character (for an object-like macro) or
9441 an opening paren (for a function-like macro). */
9442 for (p
= body
; *p
; p
++)
9443 if (*p
== ' ' || *p
== '(')
9446 if (*p
== ' ' || *p
== '\0')
9448 /* It's an object-like macro. */
9449 int name_len
= p
- body
;
9450 char *name
= copy_string (body
, name_len
);
9451 const char *replacement
;
9454 replacement
= body
+ name_len
+ 1;
9457 dwarf2_macro_malformed_definition_complaint (body
);
9458 replacement
= body
+ name_len
;
9461 macro_define_object (file
, line
, name
, replacement
);
9467 /* It's a function-like macro. */
9468 char *name
= copy_string (body
, p
- body
);
9471 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9475 p
= consume_improper_spaces (p
, body
);
9477 /* Parse the formal argument list. */
9478 while (*p
&& *p
!= ')')
9480 /* Find the extent of the current argument name. */
9481 const char *arg_start
= p
;
9483 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9486 if (! *p
|| p
== arg_start
)
9487 dwarf2_macro_malformed_definition_complaint (body
);
9490 /* Make sure argv has room for the new argument. */
9491 if (argc
>= argv_size
)
9494 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9497 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9500 p
= consume_improper_spaces (p
, body
);
9502 /* Consume the comma, if present. */
9507 p
= consume_improper_spaces (p
, body
);
9516 /* Perfectly formed definition, no complaints. */
9517 macro_define_function (file
, line
, name
,
9518 argc
, (const char **) argv
,
9520 else if (*p
== '\0')
9522 /* Complain, but do define it. */
9523 dwarf2_macro_malformed_definition_complaint (body
);
9524 macro_define_function (file
, line
, name
,
9525 argc
, (const char **) argv
,
9529 /* Just complain. */
9530 dwarf2_macro_malformed_definition_complaint (body
);
9533 /* Just complain. */
9534 dwarf2_macro_malformed_definition_complaint (body
);
9540 for (i
= 0; i
< argc
; i
++)
9546 dwarf2_macro_malformed_definition_complaint (body
);
9551 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9552 char *comp_dir
, bfd
*abfd
,
9553 struct dwarf2_cu
*cu
)
9555 gdb_byte
*mac_ptr
, *mac_end
;
9556 struct macro_source_file
*current_file
= 0;
9558 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9560 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9564 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9565 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9566 + dwarf2_per_objfile
->macinfo_size
;
9570 enum dwarf_macinfo_record_type macinfo_type
;
9572 /* Do we at least have room for a macinfo type byte? */
9573 if (mac_ptr
>= mac_end
)
9575 dwarf2_macros_too_long_complaint ();
9579 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9582 switch (macinfo_type
)
9584 /* A zero macinfo type indicates the end of the macro
9589 case DW_MACINFO_define
:
9590 case DW_MACINFO_undef
:
9592 unsigned int bytes_read
;
9596 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9597 mac_ptr
+= bytes_read
;
9598 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9599 mac_ptr
+= bytes_read
;
9602 complaint (&symfile_complaints
,
9603 _("debug info gives macro %s outside of any file: %s"),
9605 DW_MACINFO_define
? "definition" : macinfo_type
==
9606 DW_MACINFO_undef
? "undefinition" :
9607 "something-or-other", body
);
9610 if (macinfo_type
== DW_MACINFO_define
)
9611 parse_macro_definition (current_file
, line
, body
);
9612 else if (macinfo_type
== DW_MACINFO_undef
)
9613 macro_undef (current_file
, line
, body
);
9618 case DW_MACINFO_start_file
:
9620 unsigned int bytes_read
;
9623 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9624 mac_ptr
+= bytes_read
;
9625 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9626 mac_ptr
+= bytes_read
;
9628 current_file
= macro_start_file (file
, line
,
9629 current_file
, comp_dir
,
9634 case DW_MACINFO_end_file
:
9636 complaint (&symfile_complaints
,
9637 _("macro debug info has an unmatched `close_file' directive"));
9640 current_file
= current_file
->included_by
;
9643 enum dwarf_macinfo_record_type next_type
;
9645 /* GCC circa March 2002 doesn't produce the zero
9646 type byte marking the end of the compilation
9647 unit. Complain if it's not there, but exit no
9650 /* Do we at least have room for a macinfo type byte? */
9651 if (mac_ptr
>= mac_end
)
9653 dwarf2_macros_too_long_complaint ();
9657 /* We don't increment mac_ptr here, so this is just
9659 next_type
= read_1_byte (abfd
, mac_ptr
);
9661 complaint (&symfile_complaints
,
9662 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9669 case DW_MACINFO_vendor_ext
:
9671 unsigned int bytes_read
;
9675 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9676 mac_ptr
+= bytes_read
;
9677 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9678 mac_ptr
+= bytes_read
;
9680 /* We don't recognize any vendor extensions. */
9687 /* Check if the attribute's form is a DW_FORM_block*
9688 if so return true else false. */
9690 attr_form_is_block (struct attribute
*attr
)
9692 return (attr
== NULL
? 0 :
9693 attr
->form
== DW_FORM_block1
9694 || attr
->form
== DW_FORM_block2
9695 || attr
->form
== DW_FORM_block4
9696 || attr
->form
== DW_FORM_block
);
9700 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9701 struct dwarf2_cu
*cu
)
9703 struct objfile
*objfile
= cu
->objfile
;
9705 /* Save the master objfile, so that we can report and look up the
9706 correct file containing this variable. */
9707 if (objfile
->separate_debug_objfile_backlink
)
9708 objfile
= objfile
->separate_debug_objfile_backlink
;
9710 if ((attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
9711 /* ".debug_loc" may not exist at all, or the offset may be outside
9712 the section. If so, fall through to the complaint in the
9714 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9716 struct dwarf2_loclist_baton
*baton
;
9718 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9719 sizeof (struct dwarf2_loclist_baton
));
9720 baton
->objfile
= objfile
;
9722 /* We don't know how long the location list is, but make sure we
9723 don't run off the edge of the section. */
9724 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9725 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
9726 baton
->base_address
= cu
->header
.base_address
;
9727 if (cu
->header
.base_known
== 0)
9728 complaint (&symfile_complaints
,
9729 _("Location list used without specifying the CU base address."));
9731 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
9732 SYMBOL_LOCATION_BATON (sym
) = baton
;
9736 struct dwarf2_locexpr_baton
*baton
;
9738 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9739 sizeof (struct dwarf2_locexpr_baton
));
9740 baton
->objfile
= objfile
;
9742 if (attr_form_is_block (attr
))
9744 /* Note that we're just copying the block's data pointer
9745 here, not the actual data. We're still pointing into the
9746 info_buffer for SYM's objfile; right now we never release
9747 that buffer, but when we do clean up properly this may
9749 baton
->size
= DW_BLOCK (attr
)->size
;
9750 baton
->data
= DW_BLOCK (attr
)->data
;
9754 dwarf2_invalid_attrib_class_complaint ("location description",
9755 SYMBOL_NATURAL_NAME (sym
));
9760 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
9761 SYMBOL_LOCATION_BATON (sym
) = baton
;
9765 /* Locate the compilation unit from CU's objfile which contains the
9766 DIE at OFFSET. Raises an error on failure. */
9768 static struct dwarf2_per_cu_data
*
9769 dwarf2_find_containing_comp_unit (unsigned long offset
,
9770 struct objfile
*objfile
)
9772 struct dwarf2_per_cu_data
*this_cu
;
9776 high
= dwarf2_per_objfile
->n_comp_units
- 1;
9779 int mid
= low
+ (high
- low
) / 2;
9780 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
9785 gdb_assert (low
== high
);
9786 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
9789 error (_("Dwarf Error: could not find partial DIE containing "
9790 "offset 0x%lx [in module %s]"),
9791 (long) offset
, bfd_get_filename (objfile
->obfd
));
9793 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
9794 return dwarf2_per_objfile
->all_comp_units
[low
-1];
9798 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
9799 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
9800 && offset
>= this_cu
->offset
+ this_cu
->length
)
9801 error (_("invalid dwarf2 offset %ld"), offset
);
9802 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
9807 /* Locate the compilation unit from OBJFILE which is located at exactly
9808 OFFSET. Raises an error on failure. */
9810 static struct dwarf2_per_cu_data
*
9811 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
9813 struct dwarf2_per_cu_data
*this_cu
;
9814 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
9815 if (this_cu
->offset
!= offset
)
9816 error (_("no compilation unit with offset %ld."), offset
);
9820 /* Release one cached compilation unit, CU. We unlink it from the tree
9821 of compilation units, but we don't remove it from the read_in_chain;
9822 the caller is responsible for that. */
9825 free_one_comp_unit (void *data
)
9827 struct dwarf2_cu
*cu
= data
;
9829 if (cu
->per_cu
!= NULL
)
9830 cu
->per_cu
->cu
= NULL
;
9833 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9835 free_die_list (cu
->dies
);
9840 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9841 when we're finished with it. We can't free the pointer itself, but be
9842 sure to unlink it from the cache. Also release any associated storage
9843 and perform cache maintenance.
9845 Only used during partial symbol parsing. */
9848 free_stack_comp_unit (void *data
)
9850 struct dwarf2_cu
*cu
= data
;
9852 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9853 cu
->partial_dies
= NULL
;
9855 if (cu
->per_cu
!= NULL
)
9857 /* This compilation unit is on the stack in our caller, so we
9858 should not xfree it. Just unlink it. */
9859 cu
->per_cu
->cu
= NULL
;
9862 /* If we had a per-cu pointer, then we may have other compilation
9863 units loaded, so age them now. */
9864 age_cached_comp_units ();
9868 /* Free all cached compilation units. */
9871 free_cached_comp_units (void *data
)
9873 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9875 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9876 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9877 while (per_cu
!= NULL
)
9879 struct dwarf2_per_cu_data
*next_cu
;
9881 next_cu
= per_cu
->cu
->read_in_chain
;
9883 free_one_comp_unit (per_cu
->cu
);
9884 *last_chain
= next_cu
;
9890 /* Increase the age counter on each cached compilation unit, and free
9891 any that are too old. */
9894 age_cached_comp_units (void)
9896 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9898 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
9899 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9900 while (per_cu
!= NULL
)
9902 per_cu
->cu
->last_used
++;
9903 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
9904 dwarf2_mark (per_cu
->cu
);
9905 per_cu
= per_cu
->cu
->read_in_chain
;
9908 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9909 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9910 while (per_cu
!= NULL
)
9912 struct dwarf2_per_cu_data
*next_cu
;
9914 next_cu
= per_cu
->cu
->read_in_chain
;
9916 if (!per_cu
->cu
->mark
)
9918 free_one_comp_unit (per_cu
->cu
);
9919 *last_chain
= next_cu
;
9922 last_chain
= &per_cu
->cu
->read_in_chain
;
9928 /* Remove a single compilation unit from the cache. */
9931 free_one_cached_comp_unit (void *target_cu
)
9933 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9935 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9936 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9937 while (per_cu
!= NULL
)
9939 struct dwarf2_per_cu_data
*next_cu
;
9941 next_cu
= per_cu
->cu
->read_in_chain
;
9943 if (per_cu
->cu
== target_cu
)
9945 free_one_comp_unit (per_cu
->cu
);
9946 *last_chain
= next_cu
;
9950 last_chain
= &per_cu
->cu
->read_in_chain
;
9956 /* A pair of DIE offset and GDB type pointer. We store these
9957 in a hash table separate from the DIEs, and preserve them
9958 when the DIEs are flushed out of cache. */
9960 struct dwarf2_offset_and_type
9962 unsigned int offset
;
9966 /* Hash function for a dwarf2_offset_and_type. */
9969 offset_and_type_hash (const void *item
)
9971 const struct dwarf2_offset_and_type
*ofs
= item
;
9975 /* Equality function for a dwarf2_offset_and_type. */
9978 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
9980 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
9981 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
9982 return ofs_lhs
->offset
== ofs_rhs
->offset
;
9985 /* Set the type associated with DIE to TYPE. Save it in CU's hash
9986 table if necessary. */
9989 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
9991 struct dwarf2_offset_and_type
**slot
, ofs
;
9995 if (cu
->per_cu
== NULL
)
9998 if (cu
->per_cu
->type_hash
== NULL
)
9999 cu
->per_cu
->type_hash
10000 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10001 offset_and_type_hash
,
10002 offset_and_type_eq
,
10004 &cu
->objfile
->objfile_obstack
,
10005 hashtab_obstack_allocate
,
10006 dummy_obstack_deallocate
);
10008 ofs
.offset
= die
->offset
;
10010 slot
= (struct dwarf2_offset_and_type
**)
10011 htab_find_slot_with_hash (cu
->per_cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10012 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10016 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10017 have a saved type. */
10019 static struct type
*
10020 get_die_type (struct die_info
*die
, htab_t type_hash
)
10022 struct dwarf2_offset_and_type
*slot
, ofs
;
10024 ofs
.offset
= die
->offset
;
10025 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10032 /* Restore the types of the DIE tree starting at START_DIE from the hash
10033 table saved in CU. */
10036 reset_die_and_siblings_types (struct die_info
*start_die
, struct dwarf2_cu
*cu
)
10038 struct die_info
*die
;
10040 if (cu
->per_cu
->type_hash
== NULL
)
10043 for (die
= start_die
; die
!= NULL
; die
= die
->sibling
)
10045 die
->type
= get_die_type (die
, cu
->per_cu
->type_hash
);
10046 if (die
->child
!= NULL
)
10047 reset_die_and_siblings_types (die
->child
, cu
);
10051 /* Set the mark field in CU and in every other compilation unit in the
10052 cache that we must keep because we are keeping CU. */
10054 /* Add a dependence relationship from CU to REF_PER_CU. */
10057 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10058 struct dwarf2_per_cu_data
*ref_per_cu
)
10062 if (cu
->dependencies
== NULL
)
10064 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10065 NULL
, &cu
->comp_unit_obstack
,
10066 hashtab_obstack_allocate
,
10067 dummy_obstack_deallocate
);
10069 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10071 *slot
= ref_per_cu
;
10074 /* Set the mark field in CU and in every other compilation unit in the
10075 cache that we must keep because we are keeping CU. */
10078 dwarf2_mark_helper (void **slot
, void *data
)
10080 struct dwarf2_per_cu_data
*per_cu
;
10082 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10083 if (per_cu
->cu
->mark
)
10085 per_cu
->cu
->mark
= 1;
10087 if (per_cu
->cu
->dependencies
!= NULL
)
10088 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10094 dwarf2_mark (struct dwarf2_cu
*cu
)
10099 if (cu
->dependencies
!= NULL
)
10100 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10104 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10108 per_cu
->cu
->mark
= 0;
10109 per_cu
= per_cu
->cu
->read_in_chain
;
10113 /* Trivial hash function for partial_die_info: the hash value of a DIE
10114 is its offset in .debug_info for this objfile. */
10117 partial_die_hash (const void *item
)
10119 const struct partial_die_info
*part_die
= item
;
10120 return part_die
->offset
;
10123 /* Trivial comparison function for partial_die_info structures: two DIEs
10124 are equal if they have the same offset. */
10127 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10129 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10130 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10131 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10134 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10135 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10138 set_dwarf2_cmd (char *args
, int from_tty
)
10140 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10144 show_dwarf2_cmd (char *args
, int from_tty
)
10146 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10149 void _initialize_dwarf2_read (void);
10152 _initialize_dwarf2_read (void)
10154 dwarf2_objfile_data_key
= register_objfile_data ();
10156 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10157 Set DWARF 2 specific variables.\n\
10158 Configure DWARF 2 variables such as the cache size"),
10159 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10160 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10162 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10163 Show DWARF 2 specific variables\n\
10164 Show DWARF 2 variables such as the cache size"),
10165 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10166 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10168 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10169 &dwarf2_max_cache_age
, _("\
10170 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10171 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10172 A higher limit means that cached compilation units will be stored\n\
10173 in memory longer, and more total memory will be used. Zero disables\n\
10174 caching, which can slow down startup."),
10176 show_dwarf2_max_cache_age
,
10177 &set_dwarf2_cmdlist
,
10178 &show_dwarf2_cmdlist
);