1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
6 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
7 Inc. with support from Florida State University (under contract
8 with the Ada Joint Program Office), and Silicon Graphics, Inc.
9 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
10 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
13 This file is part of GDB.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "elf/dwarf2.h"
36 #include "expression.h"
37 #include "filenames.h" /* for DOSish file names */
40 #include "complaints.h"
42 #include "dwarf2expr.h"
43 #include "dwarf2loc.h"
44 #include "cp-support.h"
50 #include "gdb_string.h"
51 #include "gdb_assert.h"
52 #include <sys/types.h>
54 /* A note on memory usage for this file.
56 At the present time, this code reads the debug info sections into
57 the objfile's objfile_obstack. A definite improvement for startup
58 time, on platforms which do not emit relocations for debug
59 sections, would be to use mmap instead. The object's complete
60 debug information is loaded into memory, partly to simplify
61 absolute DIE references.
63 Whether using obstacks or mmap, the sections should remain loaded
64 until the objfile is released, and pointers into the section data
65 can be used for any other data associated to the objfile (symbol
66 names, type names, location expressions to name a few). */
69 /* .debug_info header for a compilation unit
70 Because of alignment constraints, this structure has padding and cannot
71 be mapped directly onto the beginning of the .debug_info section. */
72 typedef struct comp_unit_header
74 unsigned int length
; /* length of the .debug_info
76 unsigned short version
; /* version number -- 2 for DWARF
78 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
79 unsigned char addr_size
; /* byte size of an address -- 4 */
82 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
85 /* .debug_pubnames header
86 Because of alignment constraints, this structure has padding and cannot
87 be mapped directly onto the beginning of the .debug_info section. */
88 typedef struct pubnames_header
90 unsigned int length
; /* length of the .debug_pubnames
92 unsigned char version
; /* version number -- 2 for DWARF
94 unsigned int info_offset
; /* offset into .debug_info section */
95 unsigned int info_size
; /* byte size of .debug_info section
99 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
101 /* .debug_pubnames header
102 Because of alignment constraints, this structure has padding and cannot
103 be mapped directly onto the beginning of the .debug_info section. */
104 typedef struct aranges_header
106 unsigned int length
; /* byte len of the .debug_aranges
108 unsigned short version
; /* version number -- 2 for DWARF
110 unsigned int info_offset
; /* offset into .debug_info section */
111 unsigned char addr_size
; /* byte size of an address */
112 unsigned char seg_size
; /* byte size of segment descriptor */
115 #define _ACTUAL_ARANGES_HEADER_SIZE 12
117 /* .debug_line statement program prologue
118 Because of alignment constraints, this structure has padding and cannot
119 be mapped directly onto the beginning of the .debug_info section. */
120 typedef struct statement_prologue
122 unsigned int total_length
; /* byte length of the statement
124 unsigned short version
; /* version number -- 2 for DWARF
126 unsigned int prologue_length
; /* # bytes between prologue &
128 unsigned char minimum_instruction_length
; /* byte size of
130 unsigned char default_is_stmt
; /* initial value of is_stmt
133 unsigned char line_range
;
134 unsigned char opcode_base
; /* number assigned to first special
136 unsigned char *standard_opcode_lengths
;
140 static const struct objfile_data
*dwarf2_objfile_data_key
;
142 struct dwarf2_per_objfile
144 /* Sizes of debugging sections. */
145 unsigned int info_size
;
146 unsigned int abbrev_size
;
147 unsigned int line_size
;
148 unsigned int pubnames_size
;
149 unsigned int aranges_size
;
150 unsigned int loc_size
;
151 unsigned int macinfo_size
;
152 unsigned int str_size
;
153 unsigned int ranges_size
;
154 unsigned int frame_size
;
155 unsigned int eh_frame_size
;
157 /* Loaded data from the sections. */
158 gdb_byte
*info_buffer
;
159 gdb_byte
*abbrev_buffer
;
160 gdb_byte
*line_buffer
;
161 gdb_byte
*str_buffer
;
162 gdb_byte
*macinfo_buffer
;
163 gdb_byte
*ranges_buffer
;
164 gdb_byte
*loc_buffer
;
166 /* A list of all the compilation units. This is used to locate
167 the target compilation unit of a particular reference. */
168 struct dwarf2_per_cu_data
**all_comp_units
;
170 /* The number of compilation units in ALL_COMP_UNITS. */
173 /* A chain of compilation units that are currently read in, so that
174 they can be freed later. */
175 struct dwarf2_per_cu_data
*read_in_chain
;
177 /* A flag indicating wether this objfile has a section loaded at a
179 int has_section_at_zero
;
182 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
184 static asection
*dwarf_info_section
;
185 static asection
*dwarf_abbrev_section
;
186 static asection
*dwarf_line_section
;
187 static asection
*dwarf_pubnames_section
;
188 static asection
*dwarf_aranges_section
;
189 static asection
*dwarf_loc_section
;
190 static asection
*dwarf_macinfo_section
;
191 static asection
*dwarf_str_section
;
192 static asection
*dwarf_ranges_section
;
193 asection
*dwarf_frame_section
;
194 asection
*dwarf_eh_frame_section
;
196 /* names of the debugging sections */
198 #define INFO_SECTION ".debug_info"
199 #define ABBREV_SECTION ".debug_abbrev"
200 #define LINE_SECTION ".debug_line"
201 #define PUBNAMES_SECTION ".debug_pubnames"
202 #define ARANGES_SECTION ".debug_aranges"
203 #define LOC_SECTION ".debug_loc"
204 #define MACINFO_SECTION ".debug_macinfo"
205 #define STR_SECTION ".debug_str"
206 #define RANGES_SECTION ".debug_ranges"
207 #define FRAME_SECTION ".debug_frame"
208 #define EH_FRAME_SECTION ".eh_frame"
210 /* local data types */
212 /* We hold several abbreviation tables in memory at the same time. */
213 #ifndef ABBREV_HASH_SIZE
214 #define ABBREV_HASH_SIZE 121
217 /* The data in a compilation unit header, after target2host
218 translation, looks like this. */
219 struct comp_unit_head
221 unsigned long length
;
223 unsigned int abbrev_offset
;
224 unsigned char addr_size
;
225 unsigned char signed_addr_p
;
227 /* Size of file offsets; either 4 or 8. */
228 unsigned int offset_size
;
230 /* Size of the length field; either 4 or 12. */
231 unsigned int initial_length_size
;
233 /* Offset to the first byte of this compilation unit header in the
234 .debug_info section, for resolving relative reference dies. */
237 /* Pointer to this compilation unit header in the .debug_info
239 gdb_byte
*cu_head_ptr
;
241 /* Pointer to the first die of this compilation unit. This will be
242 the first byte following the compilation unit header. */
243 gdb_byte
*first_die_ptr
;
245 /* Pointer to the next compilation unit header in the program. */
246 struct comp_unit_head
*next
;
248 /* Base address of this compilation unit. */
249 CORE_ADDR base_address
;
251 /* Non-zero if base_address has been set. */
255 /* Fixed size for the DIE hash table. */
256 #ifndef REF_HASH_SIZE
257 #define REF_HASH_SIZE 1021
260 /* Internal state when decoding a particular compilation unit. */
263 /* The objfile containing this compilation unit. */
264 struct objfile
*objfile
;
266 /* The header of the compilation unit.
268 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
269 should logically be moved to the dwarf2_cu structure. */
270 struct comp_unit_head header
;
272 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
274 /* The language we are debugging. */
275 enum language language
;
276 const struct language_defn
*language_defn
;
278 const char *producer
;
280 /* The generic symbol table building routines have separate lists for
281 file scope symbols and all all other scopes (local scopes). So
282 we need to select the right one to pass to add_symbol_to_list().
283 We do it by keeping a pointer to the correct list in list_in_scope.
285 FIXME: The original dwarf code just treated the file scope as the
286 first local scope, and all other local scopes as nested local
287 scopes, and worked fine. Check to see if we really need to
288 distinguish these in buildsym.c. */
289 struct pending
**list_in_scope
;
291 /* Maintain an array of referenced fundamental types for the current
292 compilation unit being read. For DWARF version 1, we have to construct
293 the fundamental types on the fly, since no information about the
294 fundamental types is supplied. Each such fundamental type is created by
295 calling a language dependent routine to create the type, and then a
296 pointer to that type is then placed in the array at the index specified
297 by it's FT_<TYPENAME> value. The array has a fixed size set by the
298 FT_NUM_MEMBERS compile time constant, which is the number of predefined
299 fundamental types gdb knows how to construct. */
300 struct type
*ftypes
[FT_NUM_MEMBERS
]; /* Fundamental types */
302 /* DWARF abbreviation table associated with this compilation unit. */
303 struct abbrev_info
**dwarf2_abbrevs
;
305 /* Storage for the abbrev table. */
306 struct obstack abbrev_obstack
;
308 /* Hash table holding all the loaded partial DIEs. */
311 /* Storage for things with the same lifetime as this read-in compilation
312 unit, including partial DIEs. */
313 struct obstack comp_unit_obstack
;
315 /* When multiple dwarf2_cu structures are living in memory, this field
316 chains them all together, so that they can be released efficiently.
317 We will probably also want a generation counter so that most-recently-used
318 compilation units are cached... */
319 struct dwarf2_per_cu_data
*read_in_chain
;
321 /* Backchain to our per_cu entry if the tree has been built. */
322 struct dwarf2_per_cu_data
*per_cu
;
324 /* How many compilation units ago was this CU last referenced? */
327 /* A hash table of die offsets for following references. */
328 struct die_info
*die_ref_table
[REF_HASH_SIZE
];
330 /* Full DIEs if read in. */
331 struct die_info
*dies
;
333 /* A set of pointers to dwarf2_per_cu_data objects for compilation
334 units referenced by this one. Only set during full symbol processing;
335 partial symbol tables do not have dependencies. */
338 /* Header data from the line table, during full symbol processing. */
339 struct line_header
*line_header
;
341 /* Mark used when releasing cached dies. */
342 unsigned int mark
: 1;
344 /* This flag will be set if this compilation unit might include
345 inter-compilation-unit references. */
346 unsigned int has_form_ref_addr
: 1;
348 /* This flag will be set if this compilation unit includes any
349 DW_TAG_namespace DIEs. If we know that there are explicit
350 DIEs for namespaces, we don't need to try to infer them
351 from mangled names. */
352 unsigned int has_namespace_info
: 1;
355 /* Persistent data held for a compilation unit, even when not
356 processing it. We put a pointer to this structure in the
357 read_symtab_private field of the psymtab. If we encounter
358 inter-compilation-unit references, we also maintain a sorted
359 list of all compilation units. */
361 struct dwarf2_per_cu_data
363 /* The start offset and length of this compilation unit. 2**30-1
364 bytes should suffice to store the length of any compilation unit
365 - if it doesn't, GDB will fall over anyway. */
366 unsigned long offset
;
367 unsigned long length
: 30;
369 /* Flag indicating this compilation unit will be read in before
370 any of the current compilation units are processed. */
371 unsigned long queued
: 1;
373 /* This flag will be set if we need to load absolutely all DIEs
374 for this compilation unit, instead of just the ones we think
375 are interesting. It gets set if we look for a DIE in the
376 hash table and don't find it. */
377 unsigned int load_all_dies
: 1;
379 /* Set iff currently read in. */
380 struct dwarf2_cu
*cu
;
382 /* If full symbols for this CU have been read in, then this field
383 holds a map of DIE offsets to types. It isn't always possible
384 to reconstruct this information later, so we have to preserve
388 /* The partial symbol table associated with this compilation unit,
389 or NULL for partial units (which do not have an associated
391 struct partial_symtab
*psymtab
;
394 /* The line number information for a compilation unit (found in the
395 .debug_line section) begins with a "statement program header",
396 which contains the following information. */
399 unsigned int total_length
;
400 unsigned short version
;
401 unsigned int header_length
;
402 unsigned char minimum_instruction_length
;
403 unsigned char default_is_stmt
;
405 unsigned char line_range
;
406 unsigned char opcode_base
;
408 /* standard_opcode_lengths[i] is the number of operands for the
409 standard opcode whose value is i. This means that
410 standard_opcode_lengths[0] is unused, and the last meaningful
411 element is standard_opcode_lengths[opcode_base - 1]. */
412 unsigned char *standard_opcode_lengths
;
414 /* The include_directories table. NOTE! These strings are not
415 allocated with xmalloc; instead, they are pointers into
416 debug_line_buffer. If you try to free them, `free' will get
418 unsigned int num_include_dirs
, include_dirs_size
;
421 /* The file_names table. NOTE! These strings are not allocated
422 with xmalloc; instead, they are pointers into debug_line_buffer.
423 Don't try to free them directly. */
424 unsigned int num_file_names
, file_names_size
;
428 unsigned int dir_index
;
429 unsigned int mod_time
;
431 int included_p
; /* Non-zero if referenced by the Line Number Program. */
432 struct symtab
*symtab
; /* The associated symbol table, if any. */
435 /* The start and end of the statement program following this
436 header. These point into dwarf2_per_objfile->line_buffer. */
437 gdb_byte
*statement_program_start
, *statement_program_end
;
440 /* When we construct a partial symbol table entry we only
441 need this much information. */
442 struct partial_die_info
444 /* Offset of this DIE. */
447 /* DWARF-2 tag for this DIE. */
448 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
450 /* Language code associated with this DIE. This is only used
451 for the compilation unit DIE. */
452 unsigned int language
: 8;
454 /* Assorted flags describing the data found in this DIE. */
455 unsigned int has_children
: 1;
456 unsigned int is_external
: 1;
457 unsigned int is_declaration
: 1;
458 unsigned int has_type
: 1;
459 unsigned int has_specification
: 1;
460 unsigned int has_stmt_list
: 1;
461 unsigned int has_pc_info
: 1;
463 /* Flag set if the SCOPE field of this structure has been
465 unsigned int scope_set
: 1;
467 /* Flag set if the DIE has a byte_size attribute. */
468 unsigned int has_byte_size
: 1;
470 /* The name of this DIE. Normally the value of DW_AT_name, but
471 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
476 /* The scope to prepend to our children. This is generally
477 allocated on the comp_unit_obstack, so will disappear
478 when this compilation unit leaves the cache. */
481 /* The location description associated with this DIE, if any. */
482 struct dwarf_block
*locdesc
;
484 /* If HAS_PC_INFO, the PC range associated with this DIE. */
488 /* Pointer into the info_buffer pointing at the target of
489 DW_AT_sibling, if any. */
492 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
493 DW_AT_specification (or DW_AT_abstract_origin or
495 unsigned int spec_offset
;
497 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
498 unsigned int line_offset
;
500 /* Pointers to this DIE's parent, first child, and next sibling,
502 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
505 /* This data structure holds the information of an abbrev. */
508 unsigned int number
; /* number identifying abbrev */
509 enum dwarf_tag tag
; /* dwarf tag */
510 unsigned short has_children
; /* boolean */
511 unsigned short num_attrs
; /* number of attributes */
512 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
513 struct abbrev_info
*next
; /* next in chain */
518 enum dwarf_attribute name
;
519 enum dwarf_form form
;
522 /* This data structure holds a complete die structure. */
525 enum dwarf_tag tag
; /* Tag indicating type of die */
526 unsigned int abbrev
; /* Abbrev number */
527 unsigned int offset
; /* Offset in .debug_info section */
528 unsigned int num_attrs
; /* Number of attributes */
529 struct attribute
*attrs
; /* An array of attributes */
530 struct die_info
*next_ref
; /* Next die in ref hash table */
532 /* The dies in a compilation unit form an n-ary tree. PARENT
533 points to this die's parent; CHILD points to the first child of
534 this node; and all the children of a given node are chained
535 together via their SIBLING fields, terminated by a die whose
537 struct die_info
*child
; /* Its first child, if any. */
538 struct die_info
*sibling
; /* Its next sibling, if any. */
539 struct die_info
*parent
; /* Its parent, if any. */
541 struct type
*type
; /* Cached type information */
544 /* Attributes have a name and a value */
547 enum dwarf_attribute name
;
548 enum dwarf_form form
;
552 struct dwarf_block
*blk
;
560 struct function_range
563 CORE_ADDR lowpc
, highpc
;
565 struct function_range
*next
;
568 /* Get at parts of an attribute structure */
570 #define DW_STRING(attr) ((attr)->u.str)
571 #define DW_UNSND(attr) ((attr)->u.unsnd)
572 #define DW_BLOCK(attr) ((attr)->u.blk)
573 #define DW_SND(attr) ((attr)->u.snd)
574 #define DW_ADDR(attr) ((attr)->u.addr)
576 /* Blocks are a bunch of untyped bytes. */
583 #ifndef ATTR_ALLOC_CHUNK
584 #define ATTR_ALLOC_CHUNK 4
587 /* Allocate fields for structs, unions and enums in this size. */
588 #ifndef DW_FIELD_ALLOC_CHUNK
589 #define DW_FIELD_ALLOC_CHUNK 4
592 /* A zeroed version of a partial die for initialization purposes. */
593 static struct partial_die_info zeroed_partial_die
;
595 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
596 but this would require a corresponding change in unpack_field_as_long
598 static int bits_per_byte
= 8;
600 /* The routines that read and process dies for a C struct or C++ class
601 pass lists of data member fields and lists of member function fields
602 in an instance of a field_info structure, as defined below. */
605 /* List of data member and baseclasses fields. */
608 struct nextfield
*next
;
615 /* Number of fields. */
618 /* Number of baseclasses. */
621 /* Set if the accesibility of one of the fields is not public. */
622 int non_public_fields
;
624 /* Member function fields array, entries are allocated in the order they
625 are encountered in the object file. */
628 struct nextfnfield
*next
;
629 struct fn_field fnfield
;
633 /* Member function fieldlist array, contains name of possibly overloaded
634 member function, number of overloaded member functions and a pointer
635 to the head of the member function field chain. */
640 struct nextfnfield
*head
;
644 /* Number of entries in the fnfieldlists array. */
648 /* One item on the queue of compilation units to read in full symbols
650 struct dwarf2_queue_item
652 struct dwarf2_per_cu_data
*per_cu
;
653 struct dwarf2_queue_item
*next
;
656 /* The current queue. */
657 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
659 /* Loaded secondary compilation units are kept in memory until they
660 have not been referenced for the processing of this many
661 compilation units. Set this to zero to disable caching. Cache
662 sizes of up to at least twenty will improve startup time for
663 typical inter-CU-reference binaries, at an obvious memory cost. */
664 static int dwarf2_max_cache_age
= 5;
666 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
667 struct cmd_list_element
*c
, const char *value
)
669 fprintf_filtered (file
, _("\
670 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
675 /* Various complaints about symbol reading that don't abort the process */
678 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
680 complaint (&symfile_complaints
,
681 _("statement list doesn't fit in .debug_line section"));
685 dwarf2_debug_line_missing_file_complaint (void)
687 complaint (&symfile_complaints
,
688 _(".debug_line section has line data without a file"));
692 dwarf2_complex_location_expr_complaint (void)
694 complaint (&symfile_complaints
, _("location expression too complex"));
698 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
701 complaint (&symfile_complaints
,
702 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
707 dwarf2_macros_too_long_complaint (void)
709 complaint (&symfile_complaints
,
710 _("macro info runs off end of `.debug_macinfo' section"));
714 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
716 complaint (&symfile_complaints
,
717 _("macro debug info contains a malformed macro definition:\n`%s'"),
722 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
724 complaint (&symfile_complaints
,
725 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
728 /* local function prototypes */
730 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
733 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
736 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
739 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
740 struct partial_die_info
*,
741 struct partial_symtab
*);
743 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
745 static void scan_partial_symbols (struct partial_die_info
*,
746 CORE_ADDR
*, CORE_ADDR
*,
749 static void add_partial_symbol (struct partial_die_info
*,
752 static int pdi_needs_namespace (enum dwarf_tag tag
);
754 static void add_partial_namespace (struct partial_die_info
*pdi
,
755 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
756 struct dwarf2_cu
*cu
);
758 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
759 struct dwarf2_cu
*cu
);
761 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
764 struct dwarf2_cu
*cu
);
766 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
768 static void psymtab_to_symtab_1 (struct partial_symtab
*);
770 gdb_byte
*dwarf2_read_section (struct objfile
*, asection
*);
772 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
774 static void dwarf2_free_abbrev_table (void *);
776 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
779 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
782 static struct partial_die_info
*load_partial_dies (bfd
*, gdb_byte
*, int,
785 static gdb_byte
*read_partial_die (struct partial_die_info
*,
786 struct abbrev_info
*abbrev
, unsigned int,
787 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
789 static struct partial_die_info
*find_partial_die (unsigned long,
792 static void fixup_partial_die (struct partial_die_info
*,
795 static gdb_byte
*read_full_die (struct die_info
**, bfd
*, gdb_byte
*,
796 struct dwarf2_cu
*, int *);
798 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
799 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
801 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
802 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
804 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
806 static int read_1_signed_byte (bfd
*, gdb_byte
*);
808 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
810 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
812 static unsigned long read_8_bytes (bfd
*, gdb_byte
*);
814 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
817 static LONGEST
read_initial_length (bfd
*, gdb_byte
*,
818 struct comp_unit_head
*, unsigned int *);
820 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
823 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
825 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
827 static char *read_indirect_string (bfd
*, gdb_byte
*,
828 const struct comp_unit_head
*,
831 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
833 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
835 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
837 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
839 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
842 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
843 struct dwarf2_cu
*cu
);
845 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
847 static struct die_info
*die_specification (struct die_info
*die
,
850 static void free_line_header (struct line_header
*lh
);
852 static void add_file_name (struct line_header
*, char *, unsigned int,
853 unsigned int, unsigned int);
855 static struct line_header
*(dwarf_decode_line_header
856 (unsigned int offset
,
857 bfd
*abfd
, struct dwarf2_cu
*cu
));
859 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
860 struct dwarf2_cu
*, struct partial_symtab
*);
862 static void dwarf2_start_subfile (char *, char *, char *);
864 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
867 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
870 static void dwarf2_const_value_data (struct attribute
*attr
,
874 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
876 static struct type
*die_containing_type (struct die_info
*,
879 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
881 static void read_type_die (struct die_info
*, struct dwarf2_cu
*);
883 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
885 static char *typename_concat (struct obstack
*,
890 static void read_typedef (struct die_info
*, struct dwarf2_cu
*);
892 static void read_base_type (struct die_info
*, struct dwarf2_cu
*);
894 static void read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
896 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
898 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
900 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
902 static int dwarf2_get_pc_bounds (struct die_info
*,
903 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*);
905 static void get_scope_pc_bounds (struct die_info
*,
906 CORE_ADDR
*, CORE_ADDR
*,
909 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
912 static void dwarf2_attach_fields_to_type (struct field_info
*,
913 struct type
*, struct dwarf2_cu
*);
915 static void dwarf2_add_member_fn (struct field_info
*,
916 struct die_info
*, struct type
*,
919 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
920 struct type
*, struct dwarf2_cu
*);
922 static void read_structure_type (struct die_info
*, struct dwarf2_cu
*);
924 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
926 static char *determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
928 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
930 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
932 static const char *namespace_name (struct die_info
*die
,
933 int *is_anonymous
, struct dwarf2_cu
*);
935 static void read_enumeration_type (struct die_info
*, struct dwarf2_cu
*);
937 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
939 static struct type
*dwarf_base_type (int, int, struct dwarf2_cu
*);
941 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
943 static void read_array_type (struct die_info
*, struct dwarf2_cu
*);
945 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
948 static void read_tag_pointer_type (struct die_info
*, struct dwarf2_cu
*);
950 static void read_tag_ptr_to_member_type (struct die_info
*,
953 static void read_tag_reference_type (struct die_info
*, struct dwarf2_cu
*);
955 static void read_tag_const_type (struct die_info
*, struct dwarf2_cu
*);
957 static void read_tag_volatile_type (struct die_info
*, struct dwarf2_cu
*);
959 static void read_tag_string_type (struct die_info
*, struct dwarf2_cu
*);
961 static void read_subroutine_type (struct die_info
*, struct dwarf2_cu
*);
963 static struct die_info
*read_comp_unit (gdb_byte
*, bfd
*, struct dwarf2_cu
*);
965 static struct die_info
*read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
967 gdb_byte
**new_info_ptr
,
968 struct die_info
*parent
);
970 static struct die_info
*read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
972 gdb_byte
**new_info_ptr
,
973 struct die_info
*parent
);
975 static void free_die_list (struct die_info
*);
977 static void process_die (struct die_info
*, struct dwarf2_cu
*);
979 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
981 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
983 static struct die_info
*dwarf2_extension (struct die_info
*die
,
986 static char *dwarf_tag_name (unsigned int);
988 static char *dwarf_attr_name (unsigned int);
990 static char *dwarf_form_name (unsigned int);
992 static char *dwarf_stack_op_name (unsigned int);
994 static char *dwarf_bool_name (unsigned int);
996 static char *dwarf_type_encoding_name (unsigned int);
999 static char *dwarf_cfi_name (unsigned int);
1001 struct die_info
*copy_die (struct die_info
*);
1004 static struct die_info
*sibling_die (struct die_info
*);
1006 static void dump_die (struct die_info
*);
1008 static void dump_die_list (struct die_info
*);
1010 static void store_in_ref_table (unsigned int, struct die_info
*,
1011 struct dwarf2_cu
*);
1013 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*,
1014 struct dwarf2_cu
*);
1016 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1018 static struct die_info
*follow_die_ref (struct die_info
*,
1020 struct dwarf2_cu
*);
1022 static struct type
*dwarf2_fundamental_type (struct objfile
*, int,
1023 struct dwarf2_cu
*);
1025 /* memory allocation interface */
1027 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1029 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1031 static struct die_info
*dwarf_alloc_die (void);
1033 static void initialize_cu_func_list (struct dwarf2_cu
*);
1035 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1036 struct dwarf2_cu
*);
1038 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1039 char *, bfd
*, struct dwarf2_cu
*);
1041 static int attr_form_is_block (struct attribute
*);
1043 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1045 struct dwarf2_cu
*cu
);
1047 static gdb_byte
*skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
1048 struct dwarf2_cu
*cu
);
1050 static void free_stack_comp_unit (void *);
1052 static hashval_t
partial_die_hash (const void *item
);
1054 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1056 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1057 (unsigned long offset
, struct objfile
*objfile
);
1059 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1060 (unsigned long offset
, struct objfile
*objfile
);
1062 static void free_one_comp_unit (void *);
1064 static void free_cached_comp_units (void *);
1066 static void age_cached_comp_units (void);
1068 static void free_one_cached_comp_unit (void *);
1070 static void set_die_type (struct die_info
*, struct type
*,
1071 struct dwarf2_cu
*);
1073 static void reset_die_and_siblings_types (struct die_info
*,
1074 struct dwarf2_cu
*);
1076 static void create_all_comp_units (struct objfile
*);
1078 static struct dwarf2_cu
*load_full_comp_unit (struct dwarf2_per_cu_data
*,
1081 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1083 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1084 struct dwarf2_per_cu_data
*);
1086 static void dwarf2_mark (struct dwarf2_cu
*);
1088 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1090 static void read_set_type (struct die_info
*, struct dwarf2_cu
*);
1093 /* Try to locate the sections we need for DWARF 2 debugging
1094 information and return true if we have enough to do something. */
1097 dwarf2_has_info (struct objfile
*objfile
)
1099 struct dwarf2_per_objfile
*data
;
1101 /* Initialize per-objfile state. */
1102 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1103 memset (data
, 0, sizeof (*data
));
1104 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1105 dwarf2_per_objfile
= data
;
1107 dwarf_info_section
= 0;
1108 dwarf_abbrev_section
= 0;
1109 dwarf_line_section
= 0;
1110 dwarf_str_section
= 0;
1111 dwarf_macinfo_section
= 0;
1112 dwarf_frame_section
= 0;
1113 dwarf_eh_frame_section
= 0;
1114 dwarf_ranges_section
= 0;
1115 dwarf_loc_section
= 0;
1117 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1118 return (dwarf_info_section
!= NULL
&& dwarf_abbrev_section
!= NULL
);
1121 /* This function is mapped across the sections and remembers the
1122 offset and size of each of the debugging sections we are interested
1126 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1128 if (strcmp (sectp
->name
, INFO_SECTION
) == 0)
1130 dwarf2_per_objfile
->info_size
= bfd_get_section_size (sectp
);
1131 dwarf_info_section
= sectp
;
1133 else if (strcmp (sectp
->name
, ABBREV_SECTION
) == 0)
1135 dwarf2_per_objfile
->abbrev_size
= bfd_get_section_size (sectp
);
1136 dwarf_abbrev_section
= sectp
;
1138 else if (strcmp (sectp
->name
, LINE_SECTION
) == 0)
1140 dwarf2_per_objfile
->line_size
= bfd_get_section_size (sectp
);
1141 dwarf_line_section
= sectp
;
1143 else if (strcmp (sectp
->name
, PUBNAMES_SECTION
) == 0)
1145 dwarf2_per_objfile
->pubnames_size
= bfd_get_section_size (sectp
);
1146 dwarf_pubnames_section
= sectp
;
1148 else if (strcmp (sectp
->name
, ARANGES_SECTION
) == 0)
1150 dwarf2_per_objfile
->aranges_size
= bfd_get_section_size (sectp
);
1151 dwarf_aranges_section
= sectp
;
1153 else if (strcmp (sectp
->name
, LOC_SECTION
) == 0)
1155 dwarf2_per_objfile
->loc_size
= bfd_get_section_size (sectp
);
1156 dwarf_loc_section
= sectp
;
1158 else if (strcmp (sectp
->name
, MACINFO_SECTION
) == 0)
1160 dwarf2_per_objfile
->macinfo_size
= bfd_get_section_size (sectp
);
1161 dwarf_macinfo_section
= sectp
;
1163 else if (strcmp (sectp
->name
, STR_SECTION
) == 0)
1165 dwarf2_per_objfile
->str_size
= bfd_get_section_size (sectp
);
1166 dwarf_str_section
= sectp
;
1168 else if (strcmp (sectp
->name
, FRAME_SECTION
) == 0)
1170 dwarf2_per_objfile
->frame_size
= bfd_get_section_size (sectp
);
1171 dwarf_frame_section
= sectp
;
1173 else if (strcmp (sectp
->name
, EH_FRAME_SECTION
) == 0)
1175 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1176 if (aflag
& SEC_HAS_CONTENTS
)
1178 dwarf2_per_objfile
->eh_frame_size
= bfd_get_section_size (sectp
);
1179 dwarf_eh_frame_section
= sectp
;
1182 else if (strcmp (sectp
->name
, RANGES_SECTION
) == 0)
1184 dwarf2_per_objfile
->ranges_size
= bfd_get_section_size (sectp
);
1185 dwarf_ranges_section
= sectp
;
1188 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1189 && bfd_section_vma (abfd
, sectp
) == 0)
1190 dwarf2_per_objfile
->has_section_at_zero
= 1;
1193 /* Build a partial symbol table. */
1196 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1198 /* We definitely need the .debug_info and .debug_abbrev sections */
1200 dwarf2_per_objfile
->info_buffer
= dwarf2_read_section (objfile
, dwarf_info_section
);
1201 dwarf2_per_objfile
->abbrev_buffer
= dwarf2_read_section (objfile
, dwarf_abbrev_section
);
1203 if (dwarf_line_section
)
1204 dwarf2_per_objfile
->line_buffer
= dwarf2_read_section (objfile
, dwarf_line_section
);
1206 dwarf2_per_objfile
->line_buffer
= NULL
;
1208 if (dwarf_str_section
)
1209 dwarf2_per_objfile
->str_buffer
= dwarf2_read_section (objfile
, dwarf_str_section
);
1211 dwarf2_per_objfile
->str_buffer
= NULL
;
1213 if (dwarf_macinfo_section
)
1214 dwarf2_per_objfile
->macinfo_buffer
= dwarf2_read_section (objfile
,
1215 dwarf_macinfo_section
);
1217 dwarf2_per_objfile
->macinfo_buffer
= NULL
;
1219 if (dwarf_ranges_section
)
1220 dwarf2_per_objfile
->ranges_buffer
= dwarf2_read_section (objfile
, dwarf_ranges_section
);
1222 dwarf2_per_objfile
->ranges_buffer
= NULL
;
1224 if (dwarf_loc_section
)
1225 dwarf2_per_objfile
->loc_buffer
= dwarf2_read_section (objfile
, dwarf_loc_section
);
1227 dwarf2_per_objfile
->loc_buffer
= NULL
;
1230 || (objfile
->global_psymbols
.size
== 0
1231 && objfile
->static_psymbols
.size
== 0))
1233 init_psymbol_list (objfile
, 1024);
1237 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1239 /* Things are significantly easier if we have .debug_aranges and
1240 .debug_pubnames sections */
1242 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1246 /* only test this case for now */
1248 /* In this case we have to work a bit harder */
1249 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1254 /* Build the partial symbol table from the information in the
1255 .debug_pubnames and .debug_aranges sections. */
1258 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1260 bfd
*abfd
= objfile
->obfd
;
1261 char *aranges_buffer
, *pubnames_buffer
;
1262 char *aranges_ptr
, *pubnames_ptr
;
1263 unsigned int entry_length
, version
, info_offset
, info_size
;
1265 pubnames_buffer
= dwarf2_read_section (objfile
,
1266 dwarf_pubnames_section
);
1267 pubnames_ptr
= pubnames_buffer
;
1268 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames_size
)
1270 struct comp_unit_head cu_header
;
1271 unsigned int bytes_read
;
1273 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
1275 pubnames_ptr
+= bytes_read
;
1276 version
= read_1_byte (abfd
, pubnames_ptr
);
1278 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1280 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1284 aranges_buffer
= dwarf2_read_section (objfile
,
1285 dwarf_aranges_section
);
1290 /* Read in the comp unit header information from the debug_info at
1294 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1295 gdb_byte
*info_ptr
, bfd
*abfd
)
1298 unsigned int bytes_read
;
1299 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
1301 info_ptr
+= bytes_read
;
1302 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1304 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1306 info_ptr
+= bytes_read
;
1307 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1309 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1310 if (signed_addr
< 0)
1311 internal_error (__FILE__
, __LINE__
,
1312 _("read_comp_unit_head: dwarf from non elf file"));
1313 cu_header
->signed_addr_p
= signed_addr
;
1318 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1321 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1323 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1325 if (header
->version
!= 2 && header
->version
!= 3)
1326 error (_("Dwarf Error: wrong version in compilation unit header "
1327 "(is %d, should be %d) [in module %s]"), header
->version
,
1328 2, bfd_get_filename (abfd
));
1330 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev_size
)
1331 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1332 "(offset 0x%lx + 6) [in module %s]"),
1333 (long) header
->abbrev_offset
,
1334 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1335 bfd_get_filename (abfd
));
1337 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1338 > dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1339 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1340 "(offset 0x%lx + 0) [in module %s]"),
1341 (long) header
->length
,
1342 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1343 bfd_get_filename (abfd
));
1348 /* Allocate a new partial symtab for file named NAME and mark this new
1349 partial symtab as being an include of PST. */
1352 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1353 struct objfile
*objfile
)
1355 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1357 subpst
->section_offsets
= pst
->section_offsets
;
1358 subpst
->textlow
= 0;
1359 subpst
->texthigh
= 0;
1361 subpst
->dependencies
= (struct partial_symtab
**)
1362 obstack_alloc (&objfile
->objfile_obstack
,
1363 sizeof (struct partial_symtab
*));
1364 subpst
->dependencies
[0] = pst
;
1365 subpst
->number_of_dependencies
= 1;
1367 subpst
->globals_offset
= 0;
1368 subpst
->n_global_syms
= 0;
1369 subpst
->statics_offset
= 0;
1370 subpst
->n_static_syms
= 0;
1371 subpst
->symtab
= NULL
;
1372 subpst
->read_symtab
= pst
->read_symtab
;
1375 /* No private part is necessary for include psymtabs. This property
1376 can be used to differentiate between such include psymtabs and
1377 the regular ones. */
1378 subpst
->read_symtab_private
= NULL
;
1381 /* Read the Line Number Program data and extract the list of files
1382 included by the source file represented by PST. Build an include
1383 partial symtab for each of these included files.
1385 This procedure assumes that there *is* a Line Number Program in
1386 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1387 before calling this procedure. */
1390 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1391 struct partial_die_info
*pdi
,
1392 struct partial_symtab
*pst
)
1394 struct objfile
*objfile
= cu
->objfile
;
1395 bfd
*abfd
= objfile
->obfd
;
1396 struct line_header
*lh
;
1398 lh
= dwarf_decode_line_header (pdi
->line_offset
, abfd
, cu
);
1400 return; /* No linetable, so no includes. */
1402 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1404 free_line_header (lh
);
1408 /* Build the partial symbol table by doing a quick pass through the
1409 .debug_info and .debug_abbrev sections. */
1412 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1414 /* Instead of reading this into a big buffer, we should probably use
1415 mmap() on architectures that support it. (FIXME) */
1416 bfd
*abfd
= objfile
->obfd
;
1418 gdb_byte
*beg_of_comp_unit
;
1419 struct partial_die_info comp_unit_die
;
1420 struct partial_symtab
*pst
;
1421 struct cleanup
*back_to
;
1422 CORE_ADDR lowpc
, highpc
, baseaddr
;
1424 info_ptr
= dwarf2_per_objfile
->info_buffer
;
1426 /* Any cached compilation units will be linked by the per-objfile
1427 read_in_chain. Make sure to free them when we're done. */
1428 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1430 create_all_comp_units (objfile
);
1432 /* Since the objects we're extracting from .debug_info vary in
1433 length, only the individual functions to extract them (like
1434 read_comp_unit_head and load_partial_die) can really know whether
1435 the buffer is large enough to hold another complete object.
1437 At the moment, they don't actually check that. If .debug_info
1438 holds just one extra byte after the last compilation unit's dies,
1439 then read_comp_unit_head will happily read off the end of the
1440 buffer. read_partial_die is similarly casual. Those functions
1443 For this loop condition, simply checking whether there's any data
1444 left at all should be sufficient. */
1445 while (info_ptr
< (dwarf2_per_objfile
->info_buffer
1446 + dwarf2_per_objfile
->info_size
))
1448 struct cleanup
*back_to_inner
;
1449 struct dwarf2_cu cu
;
1450 struct abbrev_info
*abbrev
;
1451 unsigned int bytes_read
;
1452 struct dwarf2_per_cu_data
*this_cu
;
1454 beg_of_comp_unit
= info_ptr
;
1456 memset (&cu
, 0, sizeof (cu
));
1458 obstack_init (&cu
.comp_unit_obstack
);
1460 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1462 cu
.objfile
= objfile
;
1463 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
, abfd
);
1465 /* Complete the cu_header */
1466 cu
.header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1467 cu
.header
.first_die_ptr
= info_ptr
;
1468 cu
.header
.cu_head_ptr
= beg_of_comp_unit
;
1470 cu
.list_in_scope
= &file_symbols
;
1472 /* Read the abbrevs for this compilation unit into a table */
1473 dwarf2_read_abbrevs (abfd
, &cu
);
1474 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1476 this_cu
= dwarf2_find_comp_unit (cu
.header
.offset
, objfile
);
1478 /* Read the compilation unit die */
1479 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, &cu
);
1480 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1481 abfd
, info_ptr
, &cu
);
1483 if (comp_unit_die
.tag
== DW_TAG_partial_unit
)
1485 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1486 + cu
.header
.initial_length_size
);
1487 do_cleanups (back_to_inner
);
1491 /* Set the language we're debugging */
1492 set_cu_language (comp_unit_die
.language
, &cu
);
1494 /* Allocate a new partial symbol table structure */
1495 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1496 comp_unit_die
.name
? comp_unit_die
.name
: "",
1497 comp_unit_die
.lowpc
,
1498 objfile
->global_psymbols
.next
,
1499 objfile
->static_psymbols
.next
);
1501 if (comp_unit_die
.dirname
)
1502 pst
->dirname
= xstrdup (comp_unit_die
.dirname
);
1504 pst
->read_symtab_private
= (char *) this_cu
;
1506 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1508 /* Store the function that reads in the rest of the symbol table */
1509 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1511 /* If this compilation unit was already read in, free the
1512 cached copy in order to read it in again. This is
1513 necessary because we skipped some symbols when we first
1514 read in the compilation unit (see load_partial_dies).
1515 This problem could be avoided, but the benefit is
1517 if (this_cu
->cu
!= NULL
)
1518 free_one_cached_comp_unit (this_cu
->cu
);
1520 cu
.per_cu
= this_cu
;
1522 /* Note that this is a pointer to our stack frame, being
1523 added to a global data structure. It will be cleaned up
1524 in free_stack_comp_unit when we finish with this
1525 compilation unit. */
1528 this_cu
->psymtab
= pst
;
1530 /* Check if comp unit has_children.
1531 If so, read the rest of the partial symbols from this comp unit.
1532 If not, there's no more debug_info for this comp unit. */
1533 if (comp_unit_die
.has_children
)
1535 struct partial_die_info
*first_die
;
1537 lowpc
= ((CORE_ADDR
) -1);
1538 highpc
= ((CORE_ADDR
) 0);
1540 first_die
= load_partial_dies (abfd
, info_ptr
, 1, &cu
);
1542 scan_partial_symbols (first_die
, &lowpc
, &highpc
, &cu
);
1544 /* If we didn't find a lowpc, set it to highpc to avoid
1545 complaints from `maint check'. */
1546 if (lowpc
== ((CORE_ADDR
) -1))
1549 /* If the compilation unit didn't have an explicit address range,
1550 then use the information extracted from its child dies. */
1551 if (! comp_unit_die
.has_pc_info
)
1553 comp_unit_die
.lowpc
= lowpc
;
1554 comp_unit_die
.highpc
= highpc
;
1557 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1558 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1560 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1561 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1562 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1563 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1564 sort_pst_symbols (pst
);
1566 /* If there is already a psymtab or symtab for a file of this
1567 name, remove it. (If there is a symtab, more drastic things
1568 also happen.) This happens in VxWorks. */
1569 free_named_symtabs (pst
->filename
);
1571 info_ptr
= beg_of_comp_unit
+ cu
.header
.length
1572 + cu
.header
.initial_length_size
;
1574 if (comp_unit_die
.has_stmt_list
)
1576 /* Get the list of files included in the current compilation unit,
1577 and build a psymtab for each of them. */
1578 dwarf2_build_include_psymtabs (&cu
, &comp_unit_die
, pst
);
1581 do_cleanups (back_to_inner
);
1583 do_cleanups (back_to
);
1586 /* Load the DIEs for a secondary CU into memory. */
1589 load_comp_unit (struct dwarf2_per_cu_data
*this_cu
, struct objfile
*objfile
)
1591 bfd
*abfd
= objfile
->obfd
;
1592 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
1593 struct partial_die_info comp_unit_die
;
1594 struct dwarf2_cu
*cu
;
1595 struct abbrev_info
*abbrev
;
1596 unsigned int bytes_read
;
1597 struct cleanup
*back_to
;
1599 info_ptr
= dwarf2_per_objfile
->info_buffer
+ this_cu
->offset
;
1600 beg_of_comp_unit
= info_ptr
;
1602 cu
= xmalloc (sizeof (struct dwarf2_cu
));
1603 memset (cu
, 0, sizeof (struct dwarf2_cu
));
1605 obstack_init (&cu
->comp_unit_obstack
);
1607 cu
->objfile
= objfile
;
1608 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
1610 /* Complete the cu_header. */
1611 cu
->header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1612 cu
->header
.first_die_ptr
= info_ptr
;
1613 cu
->header
.cu_head_ptr
= beg_of_comp_unit
;
1615 /* Read the abbrevs for this compilation unit into a table. */
1616 dwarf2_read_abbrevs (abfd
, cu
);
1617 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
1619 /* Read the compilation unit die. */
1620 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
1621 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1622 abfd
, info_ptr
, cu
);
1624 /* Set the language we're debugging. */
1625 set_cu_language (comp_unit_die
.language
, cu
);
1627 /* Link this compilation unit into the compilation unit tree. */
1629 cu
->per_cu
= this_cu
;
1631 /* Check if comp unit has_children.
1632 If so, read the rest of the partial symbols from this comp unit.
1633 If not, there's no more debug_info for this comp unit. */
1634 if (comp_unit_die
.has_children
)
1635 load_partial_dies (abfd
, info_ptr
, 0, cu
);
1637 do_cleanups (back_to
);
1640 /* Create a list of all compilation units in OBJFILE. We do this only
1641 if an inter-comp-unit reference is found; presumably if there is one,
1642 there will be many, and one will occur early in the .debug_info section.
1643 So there's no point in building this list incrementally. */
1646 create_all_comp_units (struct objfile
*objfile
)
1650 struct dwarf2_per_cu_data
**all_comp_units
;
1651 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info_buffer
;
1655 all_comp_units
= xmalloc (n_allocated
1656 * sizeof (struct dwarf2_per_cu_data
*));
1658 while (info_ptr
< dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1660 struct comp_unit_head cu_header
;
1661 gdb_byte
*beg_of_comp_unit
;
1662 struct dwarf2_per_cu_data
*this_cu
;
1663 unsigned long offset
;
1664 unsigned int bytes_read
;
1666 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
1668 /* Read just enough information to find out where the next
1669 compilation unit is. */
1670 cu_header
.initial_length_size
= 0;
1671 cu_header
.length
= read_initial_length (objfile
->obfd
, info_ptr
,
1672 &cu_header
, &bytes_read
);
1674 /* Save the compilation unit for later lookup. */
1675 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
1676 sizeof (struct dwarf2_per_cu_data
));
1677 memset (this_cu
, 0, sizeof (*this_cu
));
1678 this_cu
->offset
= offset
;
1679 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
1681 if (n_comp_units
== n_allocated
)
1684 all_comp_units
= xrealloc (all_comp_units
,
1686 * sizeof (struct dwarf2_per_cu_data
*));
1688 all_comp_units
[n_comp_units
++] = this_cu
;
1690 info_ptr
= info_ptr
+ this_cu
->length
;
1693 dwarf2_per_objfile
->all_comp_units
1694 = obstack_alloc (&objfile
->objfile_obstack
,
1695 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1696 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
1697 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1698 xfree (all_comp_units
);
1699 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
1702 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1703 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1707 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
1708 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
1710 struct objfile
*objfile
= cu
->objfile
;
1711 bfd
*abfd
= objfile
->obfd
;
1712 struct partial_die_info
*pdi
;
1714 /* Now, march along the PDI's, descending into ones which have
1715 interesting children but skipping the children of the other ones,
1716 until we reach the end of the compilation unit. */
1722 fixup_partial_die (pdi
, cu
);
1724 /* Anonymous namespaces have no name but have interesting
1725 children, so we need to look at them. Ditto for anonymous
1728 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
1729 || pdi
->tag
== DW_TAG_enumeration_type
)
1733 case DW_TAG_subprogram
:
1734 if (pdi
->has_pc_info
)
1736 if (pdi
->lowpc
< *lowpc
)
1738 *lowpc
= pdi
->lowpc
;
1740 if (pdi
->highpc
> *highpc
)
1742 *highpc
= pdi
->highpc
;
1744 if (!pdi
->is_declaration
)
1746 add_partial_symbol (pdi
, cu
);
1750 case DW_TAG_variable
:
1751 case DW_TAG_typedef
:
1752 case DW_TAG_union_type
:
1753 if (!pdi
->is_declaration
)
1755 add_partial_symbol (pdi
, cu
);
1758 case DW_TAG_class_type
:
1759 case DW_TAG_structure_type
:
1760 if (!pdi
->is_declaration
)
1762 add_partial_symbol (pdi
, cu
);
1765 case DW_TAG_enumeration_type
:
1766 if (!pdi
->is_declaration
)
1767 add_partial_enumeration (pdi
, cu
);
1769 case DW_TAG_base_type
:
1770 case DW_TAG_subrange_type
:
1771 /* File scope base type definitions are added to the partial
1773 add_partial_symbol (pdi
, cu
);
1775 case DW_TAG_namespace
:
1776 add_partial_namespace (pdi
, lowpc
, highpc
, cu
);
1783 /* If the die has a sibling, skip to the sibling. */
1785 pdi
= pdi
->die_sibling
;
1789 /* Functions used to compute the fully scoped name of a partial DIE.
1791 Normally, this is simple. For C++, the parent DIE's fully scoped
1792 name is concatenated with "::" and the partial DIE's name. For
1793 Java, the same thing occurs except that "." is used instead of "::".
1794 Enumerators are an exception; they use the scope of their parent
1795 enumeration type, i.e. the name of the enumeration type is not
1796 prepended to the enumerator.
1798 There are two complexities. One is DW_AT_specification; in this
1799 case "parent" means the parent of the target of the specification,
1800 instead of the direct parent of the DIE. The other is compilers
1801 which do not emit DW_TAG_namespace; in this case we try to guess
1802 the fully qualified name of structure types from their members'
1803 linkage names. This must be done using the DIE's children rather
1804 than the children of any DW_AT_specification target. We only need
1805 to do this for structures at the top level, i.e. if the target of
1806 any DW_AT_specification (if any; otherwise the DIE itself) does not
1809 /* Compute the scope prefix associated with PDI's parent, in
1810 compilation unit CU. The result will be allocated on CU's
1811 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1812 field. NULL is returned if no prefix is necessary. */
1814 partial_die_parent_scope (struct partial_die_info
*pdi
,
1815 struct dwarf2_cu
*cu
)
1817 char *grandparent_scope
;
1818 struct partial_die_info
*parent
, *real_pdi
;
1820 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1821 then this means the parent of the specification DIE. */
1824 while (real_pdi
->has_specification
)
1825 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
1827 parent
= real_pdi
->die_parent
;
1831 if (parent
->scope_set
)
1832 return parent
->scope
;
1834 fixup_partial_die (parent
, cu
);
1836 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
1838 if (parent
->tag
== DW_TAG_namespace
1839 || parent
->tag
== DW_TAG_structure_type
1840 || parent
->tag
== DW_TAG_class_type
1841 || parent
->tag
== DW_TAG_union_type
)
1843 if (grandparent_scope
== NULL
)
1844 parent
->scope
= parent
->name
;
1846 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
1849 else if (parent
->tag
== DW_TAG_enumeration_type
)
1850 /* Enumerators should not get the name of the enumeration as a prefix. */
1851 parent
->scope
= grandparent_scope
;
1854 /* FIXME drow/2004-04-01: What should we be doing with
1855 function-local names? For partial symbols, we should probably be
1857 complaint (&symfile_complaints
,
1858 _("unhandled containing DIE tag %d for DIE at %d"),
1859 parent
->tag
, pdi
->offset
);
1860 parent
->scope
= grandparent_scope
;
1863 parent
->scope_set
= 1;
1864 return parent
->scope
;
1867 /* Return the fully scoped name associated with PDI, from compilation unit
1868 CU. The result will be allocated with malloc. */
1870 partial_die_full_name (struct partial_die_info
*pdi
,
1871 struct dwarf2_cu
*cu
)
1875 parent_scope
= partial_die_parent_scope (pdi
, cu
);
1876 if (parent_scope
== NULL
)
1879 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
1883 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
1885 struct objfile
*objfile
= cu
->objfile
;
1887 char *actual_name
= NULL
;
1888 const char *my_prefix
;
1889 const struct partial_symbol
*psym
= NULL
;
1891 int built_actual_name
= 0;
1893 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1895 if (pdi_needs_namespace (pdi
->tag
))
1897 actual_name
= partial_die_full_name (pdi
, cu
);
1899 built_actual_name
= 1;
1902 if (actual_name
== NULL
)
1903 actual_name
= pdi
->name
;
1907 case DW_TAG_subprogram
:
1908 if (pdi
->is_external
)
1910 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1911 mst_text, objfile); */
1912 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1913 VAR_DOMAIN
, LOC_BLOCK
,
1914 &objfile
->global_psymbols
,
1915 0, pdi
->lowpc
+ baseaddr
,
1916 cu
->language
, objfile
);
1920 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1921 mst_file_text, objfile); */
1922 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1923 VAR_DOMAIN
, LOC_BLOCK
,
1924 &objfile
->static_psymbols
,
1925 0, pdi
->lowpc
+ baseaddr
,
1926 cu
->language
, objfile
);
1929 case DW_TAG_variable
:
1930 if (pdi
->is_external
)
1933 Don't enter into the minimal symbol tables as there is
1934 a minimal symbol table entry from the ELF symbols already.
1935 Enter into partial symbol table if it has a location
1936 descriptor or a type.
1937 If the location descriptor is missing, new_symbol will create
1938 a LOC_UNRESOLVED symbol, the address of the variable will then
1939 be determined from the minimal symbol table whenever the variable
1941 The address for the partial symbol table entry is not
1942 used by GDB, but it comes in handy for debugging partial symbol
1946 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1947 if (pdi
->locdesc
|| pdi
->has_type
)
1948 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1949 VAR_DOMAIN
, LOC_STATIC
,
1950 &objfile
->global_psymbols
,
1952 cu
->language
, objfile
);
1956 /* Static Variable. Skip symbols without location descriptors. */
1957 if (pdi
->locdesc
== NULL
)
1959 if (built_actual_name
)
1960 xfree (actual_name
);
1963 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1964 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1965 mst_file_data, objfile); */
1966 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1967 VAR_DOMAIN
, LOC_STATIC
,
1968 &objfile
->static_psymbols
,
1970 cu
->language
, objfile
);
1973 case DW_TAG_typedef
:
1974 case DW_TAG_base_type
:
1975 case DW_TAG_subrange_type
:
1976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1977 VAR_DOMAIN
, LOC_TYPEDEF
,
1978 &objfile
->static_psymbols
,
1979 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1981 case DW_TAG_namespace
:
1982 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1983 VAR_DOMAIN
, LOC_TYPEDEF
,
1984 &objfile
->global_psymbols
,
1985 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1987 case DW_TAG_class_type
:
1988 case DW_TAG_structure_type
:
1989 case DW_TAG_union_type
:
1990 case DW_TAG_enumeration_type
:
1991 /* Skip external references. The DWARF standard says in the section
1992 about "Structure, Union, and Class Type Entries": "An incomplete
1993 structure, union or class type is represented by a structure,
1994 union or class entry that does not have a byte size attribute
1995 and that has a DW_AT_declaration attribute." */
1996 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
1998 if (built_actual_name
)
1999 xfree (actual_name
);
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 /* Find the filename. Do not use dwarf2_name here, since the filename
2805 is not a source language identifier. */
2806 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
2809 name
= DW_STRING (attr
);
2812 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
2814 comp_dir
= DW_STRING (attr
);
2815 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
2817 comp_dir
= ldirname (name
);
2818 if (comp_dir
!= NULL
)
2819 make_cleanup (xfree
, comp_dir
);
2821 if (comp_dir
!= NULL
)
2823 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2824 directory, get rid of it. */
2825 char *cp
= strchr (comp_dir
, ':');
2827 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2834 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
2837 set_cu_language (DW_UNSND (attr
), cu
);
2840 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
2842 cu
->producer
= DW_STRING (attr
);
2844 /* We assume that we're processing GCC output. */
2845 processing_gcc_compilation
= 2;
2847 /* The compilation unit may be in a different language or objfile,
2848 zero out all remembered fundamental types. */
2849 memset (cu
->ftypes
, 0, FT_NUM_MEMBERS
* sizeof (struct type
*));
2851 start_symtab (name
, comp_dir
, lowpc
);
2852 record_debugformat ("DWARF 2");
2853 record_producer (cu
->producer
);
2855 initialize_cu_func_list (cu
);
2857 /* Decode line number information if present. We do this before
2858 processing child DIEs, so that the line header table is available
2859 for DW_AT_decl_file. */
2860 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2863 unsigned int line_offset
= DW_UNSND (attr
);
2864 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2867 cu
->line_header
= line_header
;
2868 make_cleanup (free_cu_line_header
, cu
);
2869 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
2873 /* Process all dies in compilation unit. */
2874 if (die
->child
!= NULL
)
2876 child_die
= die
->child
;
2877 while (child_die
&& child_die
->tag
)
2879 process_die (child_die
, cu
);
2880 child_die
= sibling_die (child_die
);
2884 /* Decode macro information, if present. Dwarf 2 macro information
2885 refers to information in the line number info statement program
2886 header, so we can only read it if we've read the header
2888 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
2889 if (attr
&& line_header
)
2891 unsigned int macro_offset
= DW_UNSND (attr
);
2892 dwarf_decode_macros (line_header
, macro_offset
,
2893 comp_dir
, abfd
, cu
);
2895 do_cleanups (back_to
);
2899 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
2900 struct dwarf2_cu
*cu
)
2902 struct function_range
*thisfn
;
2904 thisfn
= (struct function_range
*)
2905 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
2906 thisfn
->name
= name
;
2907 thisfn
->lowpc
= lowpc
;
2908 thisfn
->highpc
= highpc
;
2909 thisfn
->seen_line
= 0;
2910 thisfn
->next
= NULL
;
2912 if (cu
->last_fn
== NULL
)
2913 cu
->first_fn
= thisfn
;
2915 cu
->last_fn
->next
= thisfn
;
2917 cu
->last_fn
= thisfn
;
2921 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2923 struct objfile
*objfile
= cu
->objfile
;
2924 struct context_stack
*new;
2927 struct die_info
*child_die
;
2928 struct attribute
*attr
;
2930 const char *previous_prefix
= processing_current_prefix
;
2931 struct cleanup
*back_to
= NULL
;
2934 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2936 name
= dwarf2_linkage_name (die
, cu
);
2938 /* Ignore functions with missing or empty names and functions with
2939 missing or invalid low and high pc attributes. */
2940 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
2943 if (cu
->language
== language_cplus
2944 || cu
->language
== language_java
)
2946 struct die_info
*spec_die
= die_specification (die
, cu
);
2948 /* NOTE: carlton/2004-01-23: We have to be careful in the
2949 presence of DW_AT_specification. For example, with GCC 3.4,
2954 // Definition of N::foo.
2958 then we'll have a tree of DIEs like this:
2960 1: DW_TAG_compile_unit
2961 2: DW_TAG_namespace // N
2962 3: DW_TAG_subprogram // declaration of N::foo
2963 4: DW_TAG_subprogram // definition of N::foo
2964 DW_AT_specification // refers to die #3
2966 Thus, when processing die #4, we have to pretend that we're
2967 in the context of its DW_AT_specification, namely the contex
2970 if (spec_die
!= NULL
)
2972 char *specification_prefix
= determine_prefix (spec_die
, cu
);
2973 processing_current_prefix
= specification_prefix
;
2974 back_to
= make_cleanup (xfree
, specification_prefix
);
2981 /* Record the function range for dwarf_decode_lines. */
2982 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
2984 new = push_context (0, lowpc
);
2985 new->name
= new_symbol (die
, die
->type
, cu
);
2987 /* If there is a location expression for DW_AT_frame_base, record
2989 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
2991 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2992 expression is being recorded directly in the function's symbol
2993 and not in a separate frame-base object. I guess this hack is
2994 to avoid adding some sort of frame-base adjunct/annex to the
2995 function's symbol :-(. The problem with doing this is that it
2996 results in a function symbol with a location expression that
2997 has nothing to do with the location of the function, ouch! The
2998 relationship should be: a function's symbol has-a frame base; a
2999 frame-base has-a location expression. */
3000 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3002 cu
->list_in_scope
= &local_symbols
;
3004 if (die
->child
!= NULL
)
3006 child_die
= die
->child
;
3007 while (child_die
&& child_die
->tag
)
3009 process_die (child_die
, cu
);
3010 child_die
= sibling_die (child_die
);
3014 new = pop_context ();
3015 /* Make a block for the local symbols within. */
3016 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3017 lowpc
, highpc
, objfile
);
3019 /* In C++, we can have functions nested inside functions (e.g., when
3020 a function declares a class that has methods). This means that
3021 when we finish processing a function scope, we may need to go
3022 back to building a containing block's symbol lists. */
3023 local_symbols
= new->locals
;
3024 param_symbols
= new->params
;
3026 /* If we've finished processing a top-level function, subsequent
3027 symbols go in the file symbol list. */
3028 if (outermost_context_p ())
3029 cu
->list_in_scope
= &file_symbols
;
3031 processing_current_prefix
= previous_prefix
;
3032 if (back_to
!= NULL
)
3033 do_cleanups (back_to
);
3036 /* Process all the DIES contained within a lexical block scope. Start
3037 a new scope, process the dies, and then close the scope. */
3040 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3042 struct objfile
*objfile
= cu
->objfile
;
3043 struct context_stack
*new;
3044 CORE_ADDR lowpc
, highpc
;
3045 struct die_info
*child_die
;
3048 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3050 /* Ignore blocks with missing or invalid low and high pc attributes. */
3051 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3052 as multiple lexical blocks? Handling children in a sane way would
3053 be nasty. Might be easier to properly extend generic blocks to
3055 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3060 push_context (0, lowpc
);
3061 if (die
->child
!= NULL
)
3063 child_die
= die
->child
;
3064 while (child_die
&& child_die
->tag
)
3066 process_die (child_die
, cu
);
3067 child_die
= sibling_die (child_die
);
3070 new = pop_context ();
3072 if (local_symbols
!= NULL
)
3074 finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3077 local_symbols
= new->locals
;
3080 /* Get low and high pc attributes from a die. Return 1 if the attributes
3081 are present and valid, otherwise, return 0. Return -1 if the range is
3082 discontinuous, i.e. derived from DW_AT_ranges information. */
3084 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3085 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3087 struct objfile
*objfile
= cu
->objfile
;
3088 struct comp_unit_head
*cu_header
= &cu
->header
;
3089 struct attribute
*attr
;
3090 bfd
*obfd
= objfile
->obfd
;
3095 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3098 high
= DW_ADDR (attr
);
3099 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3101 low
= DW_ADDR (attr
);
3103 /* Found high w/o low attribute. */
3106 /* Found consecutive range of addresses. */
3111 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3114 unsigned int addr_size
= cu_header
->addr_size
;
3115 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3116 /* Value of the DW_AT_ranges attribute is the offset in the
3117 .debug_ranges section. */
3118 unsigned int offset
= DW_UNSND (attr
);
3119 /* Base address selection entry. */
3127 found_base
= cu_header
->base_known
;
3128 base
= cu_header
->base_address
;
3130 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3132 complaint (&symfile_complaints
,
3133 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3137 buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3139 /* Read in the largest possible address. */
3140 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3141 if ((marker
& mask
) == mask
)
3143 /* If we found the largest possible address, then
3144 read the base address. */
3145 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3146 buffer
+= 2 * addr_size
;
3147 offset
+= 2 * addr_size
;
3155 CORE_ADDR range_beginning
, range_end
;
3157 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3158 buffer
+= addr_size
;
3159 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3160 buffer
+= addr_size
;
3161 offset
+= 2 * addr_size
;
3163 /* An end of list marker is a pair of zero addresses. */
3164 if (range_beginning
== 0 && range_end
== 0)
3165 /* Found the end of list entry. */
3168 /* Each base address selection entry is a pair of 2 values.
3169 The first is the largest possible address, the second is
3170 the base address. Check for a base address here. */
3171 if ((range_beginning
& mask
) == mask
)
3173 /* If we found the largest possible address, then
3174 read the base address. */
3175 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3182 /* We have no valid base address for the ranges
3184 complaint (&symfile_complaints
,
3185 _("Invalid .debug_ranges data (no base address)"));
3189 range_beginning
+= base
;
3192 /* FIXME: This is recording everything as a low-high
3193 segment of consecutive addresses. We should have a
3194 data structure for discontiguous block ranges
3198 low
= range_beginning
;
3204 if (range_beginning
< low
)
3205 low
= range_beginning
;
3206 if (range_end
> high
)
3212 /* If the first entry is an end-of-list marker, the range
3213 describes an empty scope, i.e. no instructions. */
3223 /* When using the GNU linker, .gnu.linkonce. sections are used to
3224 eliminate duplicate copies of functions and vtables and such.
3225 The linker will arbitrarily choose one and discard the others.
3226 The AT_*_pc values for such functions refer to local labels in
3227 these sections. If the section from that file was discarded, the
3228 labels are not in the output, so the relocs get a value of 0.
3229 If this is a discarded function, mark the pc bounds as invalid,
3230 so that GDB will ignore it. */
3231 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3239 /* Get the low and high pc's represented by the scope DIE, and store
3240 them in *LOWPC and *HIGHPC. If the correct values can't be
3241 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3244 get_scope_pc_bounds (struct die_info
*die
,
3245 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3246 struct dwarf2_cu
*cu
)
3248 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3249 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3250 CORE_ADDR current_low
, current_high
;
3252 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3254 best_low
= current_low
;
3255 best_high
= current_high
;
3259 struct die_info
*child
= die
->child
;
3261 while (child
&& child
->tag
)
3263 switch (child
->tag
) {
3264 case DW_TAG_subprogram
:
3265 if (dwarf2_get_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
))
3267 best_low
= min (best_low
, current_low
);
3268 best_high
= max (best_high
, current_high
);
3271 case DW_TAG_namespace
:
3272 /* FIXME: carlton/2004-01-16: Should we do this for
3273 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3274 that current GCC's always emit the DIEs corresponding
3275 to definitions of methods of classes as children of a
3276 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3277 the DIEs giving the declarations, which could be
3278 anywhere). But I don't see any reason why the
3279 standards says that they have to be there. */
3280 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3282 if (current_low
!= ((CORE_ADDR
) -1))
3284 best_low
= min (best_low
, current_low
);
3285 best_high
= max (best_high
, current_high
);
3293 child
= sibling_die (child
);
3298 *highpc
= best_high
;
3301 /* Add an aggregate field to the field list. */
3304 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3305 struct dwarf2_cu
*cu
)
3307 struct objfile
*objfile
= cu
->objfile
;
3308 struct nextfield
*new_field
;
3309 struct attribute
*attr
;
3311 char *fieldname
= "";
3313 /* Allocate a new field list entry and link it in. */
3314 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3315 make_cleanup (xfree
, new_field
);
3316 memset (new_field
, 0, sizeof (struct nextfield
));
3317 new_field
->next
= fip
->fields
;
3318 fip
->fields
= new_field
;
3321 /* Handle accessibility and virtuality of field.
3322 The default accessibility for members is public, the default
3323 accessibility for inheritance is private. */
3324 if (die
->tag
!= DW_TAG_inheritance
)
3325 new_field
->accessibility
= DW_ACCESS_public
;
3327 new_field
->accessibility
= DW_ACCESS_private
;
3328 new_field
->virtuality
= DW_VIRTUALITY_none
;
3330 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3332 new_field
->accessibility
= DW_UNSND (attr
);
3333 if (new_field
->accessibility
!= DW_ACCESS_public
)
3334 fip
->non_public_fields
= 1;
3335 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3337 new_field
->virtuality
= DW_UNSND (attr
);
3339 fp
= &new_field
->field
;
3341 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3343 /* Data member other than a C++ static data member. */
3345 /* Get type of field. */
3346 fp
->type
= die_type (die
, cu
);
3348 FIELD_STATIC_KIND (*fp
) = 0;
3350 /* Get bit size of field (zero if none). */
3351 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3354 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3358 FIELD_BITSIZE (*fp
) = 0;
3361 /* Get bit offset of field. */
3362 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3365 FIELD_BITPOS (*fp
) =
3366 decode_locdesc (DW_BLOCK (attr
), cu
) * bits_per_byte
;
3369 FIELD_BITPOS (*fp
) = 0;
3370 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
3373 if (BITS_BIG_ENDIAN
)
3375 /* For big endian bits, the DW_AT_bit_offset gives the
3376 additional bit offset from the MSB of the containing
3377 anonymous object to the MSB of the field. We don't
3378 have to do anything special since we don't need to
3379 know the size of the anonymous object. */
3380 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
3384 /* For little endian bits, compute the bit offset to the
3385 MSB of the anonymous object, subtract off the number of
3386 bits from the MSB of the field to the MSB of the
3387 object, and then subtract off the number of bits of
3388 the field itself. The result is the bit offset of
3389 the LSB of the field. */
3391 int bit_offset
= DW_UNSND (attr
);
3393 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3396 /* The size of the anonymous object containing
3397 the bit field is explicit, so use the
3398 indicated size (in bytes). */
3399 anonymous_size
= DW_UNSND (attr
);
3403 /* The size of the anonymous object containing
3404 the bit field must be inferred from the type
3405 attribute of the data member containing the
3407 anonymous_size
= TYPE_LENGTH (fp
->type
);
3409 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
3410 - bit_offset
- FIELD_BITSIZE (*fp
);
3414 /* Get name of field. */
3415 fieldname
= dwarf2_name (die
, cu
);
3416 if (fieldname
== NULL
)
3419 /* The name is already allocated along with this objfile, so we don't
3420 need to duplicate it for the type. */
3421 fp
->name
= fieldname
;
3423 /* Change accessibility for artificial fields (e.g. virtual table
3424 pointer or virtual base class pointer) to private. */
3425 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
3427 new_field
->accessibility
= DW_ACCESS_private
;
3428 fip
->non_public_fields
= 1;
3431 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
3433 /* C++ static member. */
3435 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3436 is a declaration, but all versions of G++ as of this writing
3437 (so through at least 3.2.1) incorrectly generate
3438 DW_TAG_variable tags. */
3442 /* Get name of field. */
3443 fieldname
= dwarf2_name (die
, cu
);
3444 if (fieldname
== NULL
)
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 fieldname
= dwarf2_name (die
, cu
);
3575 if (fieldname
== NULL
)
3578 /* Get the mangled name. */
3579 physname
= dwarf2_linkage_name (die
, cu
);
3581 /* Look up member function name in fieldlist. */
3582 for (i
= 0; i
< fip
->nfnfields
; i
++)
3584 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
3588 /* Create new list element if necessary. */
3589 if (i
< fip
->nfnfields
)
3590 flp
= &fip
->fnfieldlists
[i
];
3593 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3595 fip
->fnfieldlists
= (struct fnfieldlist
*)
3596 xrealloc (fip
->fnfieldlists
,
3597 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
3598 * sizeof (struct fnfieldlist
));
3599 if (fip
->nfnfields
== 0)
3600 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
3602 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
3603 flp
->name
= fieldname
;
3609 /* Create a new member function field and chain it to the field list
3611 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
3612 make_cleanup (xfree
, new_fnfield
);
3613 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
3614 new_fnfield
->next
= flp
->head
;
3615 flp
->head
= new_fnfield
;
3618 /* Fill in the member function field info. */
3619 fnp
= &new_fnfield
->fnfield
;
3620 /* The name is already allocated along with this objfile, so we don't
3621 need to duplicate it for the type. */
3622 fnp
->physname
= physname
? physname
: "";
3623 fnp
->type
= alloc_type (objfile
);
3624 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
3626 int nparams
= TYPE_NFIELDS (die
->type
);
3628 /* TYPE is the domain of this method, and DIE->TYPE is the type
3629 of the method itself (TYPE_CODE_METHOD). */
3630 smash_to_method_type (fnp
->type
, type
,
3631 TYPE_TARGET_TYPE (die
->type
),
3632 TYPE_FIELDS (die
->type
),
3633 TYPE_NFIELDS (die
->type
),
3634 TYPE_VARARGS (die
->type
));
3636 /* Handle static member functions.
3637 Dwarf2 has no clean way to discern C++ static and non-static
3638 member functions. G++ helps GDB by marking the first
3639 parameter for non-static member functions (which is the
3640 this pointer) as artificial. We obtain this information
3641 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3642 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
3643 fnp
->voffset
= VOFFSET_STATIC
;
3646 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
3649 /* Get fcontext from DW_AT_containing_type if present. */
3650 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3651 fnp
->fcontext
= die_containing_type (die
, cu
);
3653 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3654 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3656 /* Get accessibility. */
3657 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3660 switch (DW_UNSND (attr
))
3662 case DW_ACCESS_private
:
3663 fnp
->is_private
= 1;
3665 case DW_ACCESS_protected
:
3666 fnp
->is_protected
= 1;
3671 /* Check for artificial methods. */
3672 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
3673 if (attr
&& DW_UNSND (attr
) != 0)
3674 fnp
->is_artificial
= 1;
3676 /* Get index in virtual function table if it is a virtual member function. */
3677 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
3680 /* Support the .debug_loc offsets */
3681 if (attr_form_is_block (attr
))
3683 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
3685 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
3687 dwarf2_complex_location_expr_complaint ();
3691 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3697 /* Create the vector of member function fields, and attach it to the type. */
3700 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
3701 struct dwarf2_cu
*cu
)
3703 struct fnfieldlist
*flp
;
3704 int total_length
= 0;
3707 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3708 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
3709 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
3711 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
3713 struct nextfnfield
*nfp
= flp
->head
;
3714 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
3717 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
3718 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
3719 fn_flp
->fn_fields
= (struct fn_field
*)
3720 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
3721 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
3722 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
3724 total_length
+= flp
->length
;
3727 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
3728 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
3731 /* Returns non-zero if NAME is the name of a vtable member in CU's
3732 language, zero otherwise. */
3734 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
3736 static const char vptr
[] = "_vptr";
3737 static const char vtable
[] = "vtable";
3739 /* Look for the C++ and Java forms of the vtable. */
3740 if ((cu
->language
== language_java
3741 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
3742 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
3743 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
3749 /* GCC outputs unnamed structures that are really pointers to member
3750 functions, with the ABI-specified layout. If DIE (from CU) describes
3751 such a structure, set its type, and return nonzero. Otherwise return
3754 GCC shouldn't do this; it should just output pointer to member DIEs.
3755 This is GCC PR debug/28767. */
3758 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
3760 struct objfile
*objfile
= cu
->objfile
;
3762 struct die_info
*pfn_die
, *delta_die
;
3763 struct attribute
*pfn_name
, *delta_name
;
3764 struct type
*pfn_type
, *domain_type
;
3766 /* Check for a structure with no name and two children. */
3767 if (die
->tag
!= DW_TAG_structure_type
3768 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
3769 || die
->child
== NULL
3770 || die
->child
->sibling
== NULL
3771 || (die
->child
->sibling
->sibling
!= NULL
3772 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
3775 /* Check for __pfn and __delta members. */
3776 pfn_die
= die
->child
;
3777 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
3778 if (pfn_die
->tag
!= DW_TAG_member
3780 || DW_STRING (pfn_name
) == NULL
3781 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
3784 delta_die
= pfn_die
->sibling
;
3785 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
3786 if (delta_die
->tag
!= DW_TAG_member
3787 || delta_name
== NULL
3788 || DW_STRING (delta_name
) == NULL
3789 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
3792 /* Find the type of the method. */
3793 pfn_type
= die_type (pfn_die
, cu
);
3794 if (pfn_type
== NULL
3795 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
3796 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
3799 /* Look for the "this" argument. */
3800 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
3801 if (TYPE_NFIELDS (pfn_type
) == 0
3802 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
3805 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
3806 type
= alloc_type (objfile
);
3807 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
3808 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
3809 TYPE_VARARGS (pfn_type
));
3810 type
= lookup_methodptr_type (type
);
3811 set_die_type (die
, type
, cu
);
3816 /* Called when we find the DIE that starts a structure or union scope
3817 (definition) to process all dies that define the members of the
3820 NOTE: we need to call struct_type regardless of whether or not the
3821 DIE has an at_name attribute, since it might be an anonymous
3822 structure or union. This gets the type entered into our set of
3825 However, if the structure is incomplete (an opaque struct/union)
3826 then suppress creating a symbol table entry for it since gdb only
3827 wants to find the one with the complete definition. Note that if
3828 it is complete, we just call new_symbol, which does it's own
3829 checking about whether the struct/union is anonymous or not (and
3830 suppresses creating a symbol table entry itself). */
3833 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
3835 struct objfile
*objfile
= cu
->objfile
;
3837 struct attribute
*attr
;
3838 const char *previous_prefix
= processing_current_prefix
;
3839 struct cleanup
*back_to
= NULL
;
3845 if (quirk_gcc_member_function_pointer (die
, cu
))
3848 type
= alloc_type (objfile
);
3849 INIT_CPLUS_SPECIFIC (type
);
3850 name
= dwarf2_name (die
, cu
);
3853 if (cu
->language
== language_cplus
3854 || cu
->language
== language_java
)
3856 char *new_prefix
= determine_class_name (die
, cu
);
3857 TYPE_TAG_NAME (type
) = obsavestring (new_prefix
,
3858 strlen (new_prefix
),
3859 &objfile
->objfile_obstack
);
3860 back_to
= make_cleanup (xfree
, new_prefix
);
3861 processing_current_prefix
= new_prefix
;
3865 /* The name is already allocated along with this objfile, so
3866 we don't need to duplicate it for the type. */
3867 TYPE_TAG_NAME (type
) = name
;
3871 if (die
->tag
== DW_TAG_structure_type
)
3873 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
3875 else if (die
->tag
== DW_TAG_union_type
)
3877 TYPE_CODE (type
) = TYPE_CODE_UNION
;
3881 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
3883 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
3886 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3889 TYPE_LENGTH (type
) = DW_UNSND (attr
);
3893 TYPE_LENGTH (type
) = 0;
3896 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB_SUPPORTED
;
3897 if (die_is_declaration (die
, cu
))
3898 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
3900 /* We need to add the type field to the die immediately so we don't
3901 infinitely recurse when dealing with pointers to the structure
3902 type within the structure itself. */
3903 set_die_type (die
, type
, cu
);
3905 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
3907 struct field_info fi
;
3908 struct die_info
*child_die
;
3909 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3911 memset (&fi
, 0, sizeof (struct field_info
));
3913 child_die
= die
->child
;
3915 while (child_die
&& child_die
->tag
)
3917 if (child_die
->tag
== DW_TAG_member
3918 || child_die
->tag
== DW_TAG_variable
)
3920 /* NOTE: carlton/2002-11-05: A C++ static data member
3921 should be a DW_TAG_member that is a declaration, but
3922 all versions of G++ as of this writing (so through at
3923 least 3.2.1) incorrectly generate DW_TAG_variable
3924 tags for them instead. */
3925 dwarf2_add_field (&fi
, child_die
, cu
);
3927 else if (child_die
->tag
== DW_TAG_subprogram
)
3929 /* C++ member function. */
3930 read_type_die (child_die
, cu
);
3931 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
3933 else if (child_die
->tag
== DW_TAG_inheritance
)
3935 /* C++ base class field. */
3936 dwarf2_add_field (&fi
, child_die
, cu
);
3938 child_die
= sibling_die (child_die
);
3941 /* Attach fields and member functions to the type. */
3943 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
3946 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
3948 /* Get the type which refers to the base class (possibly this
3949 class itself) which contains the vtable pointer for the current
3950 class from the DW_AT_containing_type attribute. */
3952 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3954 struct type
*t
= die_containing_type (die
, cu
);
3956 TYPE_VPTR_BASETYPE (type
) = t
;
3961 /* Our own class provides vtbl ptr. */
3962 for (i
= TYPE_NFIELDS (t
) - 1;
3963 i
>= TYPE_N_BASECLASSES (t
);
3966 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
3968 if (is_vtable_name (fieldname
, cu
))
3970 TYPE_VPTR_FIELDNO (type
) = i
;
3975 /* Complain if virtual function table field not found. */
3976 if (i
< TYPE_N_BASECLASSES (t
))
3977 complaint (&symfile_complaints
,
3978 _("virtual function table pointer not found when defining class '%s'"),
3979 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
3984 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3987 else if (cu
->producer
3988 && strncmp (cu
->producer
,
3989 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
3991 /* The IBM XLC compiler does not provide direct indication
3992 of the containing type, but the vtable pointer is
3993 always named __vfp. */
3997 for (i
= TYPE_NFIELDS (type
) - 1;
3998 i
>= TYPE_N_BASECLASSES (type
);
4001 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4003 TYPE_VPTR_FIELDNO (type
) = i
;
4004 TYPE_VPTR_BASETYPE (type
) = type
;
4011 do_cleanups (back_to
);
4014 processing_current_prefix
= previous_prefix
;
4015 if (back_to
!= NULL
)
4016 do_cleanups (back_to
);
4020 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4022 struct objfile
*objfile
= cu
->objfile
;
4023 const char *previous_prefix
= processing_current_prefix
;
4024 struct die_info
*child_die
= die
->child
;
4026 if (TYPE_TAG_NAME (die
->type
) != NULL
)
4027 processing_current_prefix
= TYPE_TAG_NAME (die
->type
);
4029 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4030 snapshots) has been known to create a die giving a declaration
4031 for a class that has, as a child, a die giving a definition for a
4032 nested class. So we have to process our children even if the
4033 current die is a declaration. Normally, of course, a declaration
4034 won't have any children at all. */
4036 while (child_die
!= NULL
&& child_die
->tag
)
4038 if (child_die
->tag
== DW_TAG_member
4039 || child_die
->tag
== DW_TAG_variable
4040 || child_die
->tag
== DW_TAG_inheritance
)
4045 process_die (child_die
, cu
);
4047 child_die
= sibling_die (child_die
);
4050 /* Do not consider external references. According to the DWARF standard,
4051 these DIEs are identified by the fact that they have no byte_size
4052 attribute, and a declaration attribute. */
4053 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4054 || !die_is_declaration (die
, cu
))
4055 new_symbol (die
, die
->type
, cu
);
4057 processing_current_prefix
= previous_prefix
;
4060 /* Given a DW_AT_enumeration_type die, set its type. We do not
4061 complete the type's fields yet, or create any symbols. */
4064 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4066 struct objfile
*objfile
= cu
->objfile
;
4068 struct attribute
*attr
;
4074 type
= alloc_type (objfile
);
4076 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4077 name
= dwarf2_name (die
, cu
);
4080 if (processing_has_namespace_info
)
4082 TYPE_TAG_NAME (type
) = typename_concat (&objfile
->objfile_obstack
,
4083 processing_current_prefix
,
4088 /* The name is already allocated along with this objfile, so
4089 we don't need to duplicate it for the type. */
4090 TYPE_TAG_NAME (type
) = name
;
4094 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4097 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4101 TYPE_LENGTH (type
) = 0;
4104 set_die_type (die
, type
, cu
);
4107 /* Determine the name of the type represented by DIE, which should be
4108 a named C++ or Java compound type. Return the name in question; the caller
4109 is responsible for xfree()'ing it. */
4112 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4114 struct cleanup
*back_to
= NULL
;
4115 struct die_info
*spec_die
= die_specification (die
, cu
);
4116 char *new_prefix
= NULL
;
4118 /* If this is the definition of a class that is declared by another
4119 die, then processing_current_prefix may not be accurate; see
4120 read_func_scope for a similar example. */
4121 if (spec_die
!= NULL
)
4123 char *specification_prefix
= determine_prefix (spec_die
, cu
);
4124 processing_current_prefix
= specification_prefix
;
4125 back_to
= make_cleanup (xfree
, specification_prefix
);
4128 /* If we don't have namespace debug info, guess the name by trying
4129 to demangle the names of members, just like we did in
4130 guess_structure_name. */
4131 if (!processing_has_namespace_info
)
4133 struct die_info
*child
;
4135 for (child
= die
->child
;
4136 child
!= NULL
&& child
->tag
!= 0;
4137 child
= sibling_die (child
))
4139 if (child
->tag
== DW_TAG_subprogram
)
4142 = language_class_name_from_physname (cu
->language_defn
,
4146 if (new_prefix
!= NULL
)
4152 if (new_prefix
== NULL
)
4154 const char *name
= dwarf2_name (die
, cu
);
4155 new_prefix
= typename_concat (NULL
, processing_current_prefix
,
4156 name
? name
: "<<anonymous>>",
4160 if (back_to
!= NULL
)
4161 do_cleanups (back_to
);
4166 /* Given a pointer to a die which begins an enumeration, process all
4167 the dies that define the members of the enumeration, and create the
4168 symbol for the enumeration type.
4170 NOTE: We reverse the order of the element list. */
4173 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4175 struct objfile
*objfile
= cu
->objfile
;
4176 struct die_info
*child_die
;
4177 struct field
*fields
;
4180 int unsigned_enum
= 1;
4185 if (die
->child
!= NULL
)
4187 child_die
= die
->child
;
4188 while (child_die
&& child_die
->tag
)
4190 if (child_die
->tag
!= DW_TAG_enumerator
)
4192 process_die (child_die
, cu
);
4196 name
= dwarf2_name (child_die
, cu
);
4199 sym
= new_symbol (child_die
, die
->type
, cu
);
4200 if (SYMBOL_VALUE (sym
) < 0)
4203 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4205 fields
= (struct field
*)
4207 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4208 * sizeof (struct field
));
4211 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
4212 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4213 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
4214 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4215 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
4221 child_die
= sibling_die (child_die
);
4226 TYPE_NFIELDS (die
->type
) = num_fields
;
4227 TYPE_FIELDS (die
->type
) = (struct field
*)
4228 TYPE_ALLOC (die
->type
, sizeof (struct field
) * num_fields
);
4229 memcpy (TYPE_FIELDS (die
->type
), fields
,
4230 sizeof (struct field
) * num_fields
);
4234 TYPE_FLAGS (die
->type
) |= TYPE_FLAG_UNSIGNED
;
4237 new_symbol (die
, die
->type
, cu
);
4240 /* Extract all information from a DW_TAG_array_type DIE and put it in
4241 the DIE's type field. For now, this only handles one dimensional
4245 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4247 struct objfile
*objfile
= cu
->objfile
;
4248 struct die_info
*child_die
;
4249 struct type
*type
= NULL
;
4250 struct type
*element_type
, *range_type
, *index_type
;
4251 struct type
**range_types
= NULL
;
4252 struct attribute
*attr
;
4254 struct cleanup
*back_to
;
4257 /* Return if we've already decoded this type. */
4263 element_type
= die_type (die
, cu
);
4265 /* Irix 6.2 native cc creates array types without children for
4266 arrays with unspecified length. */
4267 if (die
->child
== NULL
)
4269 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
, cu
);
4270 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4271 set_die_type (die
, create_array_type (NULL
, element_type
, range_type
),
4276 back_to
= make_cleanup (null_cleanup
, NULL
);
4277 child_die
= die
->child
;
4278 while (child_die
&& child_die
->tag
)
4280 if (child_die
->tag
== DW_TAG_subrange_type
)
4282 read_subrange_type (child_die
, cu
);
4284 if (child_die
->type
!= NULL
)
4286 /* The range type was succesfully read. Save it for
4287 the array type creation. */
4288 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4290 range_types
= (struct type
**)
4291 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4292 * sizeof (struct type
*));
4294 make_cleanup (free_current_contents
, &range_types
);
4296 range_types
[ndim
++] = child_die
->type
;
4299 child_die
= sibling_die (child_die
);
4302 /* Dwarf2 dimensions are output from left to right, create the
4303 necessary array types in backwards order. */
4305 type
= element_type
;
4307 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4311 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4316 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4319 /* Understand Dwarf2 support for vector types (like they occur on
4320 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4321 array type. This is not part of the Dwarf2/3 standard yet, but a
4322 custom vendor extension. The main difference between a regular
4323 array and the vector variant is that vectors are passed by value
4325 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4327 make_vector_type (type
);
4329 name
= dwarf2_name (die
, cu
);
4331 TYPE_NAME (type
) = name
;
4333 do_cleanups (back_to
);
4335 /* Install the type in the die. */
4336 set_die_type (die
, type
, cu
);
4339 static enum dwarf_array_dim_ordering
4340 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4342 struct attribute
*attr
;
4344 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4346 if (attr
) return DW_SND (attr
);
4349 GNU F77 is a special case, as at 08/2004 array type info is the
4350 opposite order to the dwarf2 specification, but data is still
4351 laid out as per normal fortran.
4353 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4357 if (cu
->language
== language_fortran
&&
4358 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4360 return DW_ORD_row_major
;
4363 switch (cu
->language_defn
->la_array_ordering
)
4365 case array_column_major
:
4366 return DW_ORD_col_major
;
4367 case array_row_major
:
4369 return DW_ORD_row_major
;
4373 /* Extract all information from a DW_TAG_set_type DIE and put it in
4374 the DIE's type field. */
4377 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4379 if (die
->type
== NULL
)
4380 die
->type
= create_set_type ((struct type
*) NULL
, die_type (die
, cu
));
4383 /* First cut: install each common block member as a global variable. */
4386 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4388 struct die_info
*child_die
;
4389 struct attribute
*attr
;
4391 CORE_ADDR base
= (CORE_ADDR
) 0;
4393 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4396 /* Support the .debug_loc offsets */
4397 if (attr_form_is_block (attr
))
4399 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
4401 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
4403 dwarf2_complex_location_expr_complaint ();
4407 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4408 "common block member");
4411 if (die
->child
!= NULL
)
4413 child_die
= die
->child
;
4414 while (child_die
&& child_die
->tag
)
4416 sym
= new_symbol (child_die
, NULL
, cu
);
4417 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
4420 SYMBOL_VALUE_ADDRESS (sym
) =
4421 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
4422 add_symbol_to_list (sym
, &global_symbols
);
4424 child_die
= sibling_die (child_die
);
4429 /* Read a C++ namespace. */
4432 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4434 struct objfile
*objfile
= cu
->objfile
;
4435 const char *previous_prefix
= processing_current_prefix
;
4438 struct die_info
*current_die
;
4439 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4441 name
= namespace_name (die
, &is_anonymous
, cu
);
4443 /* Now build the name of the current namespace. */
4445 if (previous_prefix
[0] == '\0')
4447 processing_current_prefix
= name
;
4451 char *temp_name
= typename_concat (NULL
, previous_prefix
, name
, cu
);
4452 make_cleanup (xfree
, temp_name
);
4453 processing_current_prefix
= temp_name
;
4456 /* Add a symbol associated to this if we haven't seen the namespace
4457 before. Also, add a using directive if it's an anonymous
4460 if (dwarf2_extension (die
, cu
) == NULL
)
4464 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4465 this cast will hopefully become unnecessary. */
4466 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
4467 (char *) processing_current_prefix
,
4469 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
4471 new_symbol (die
, type
, cu
);
4472 set_die_type (die
, type
, cu
);
4475 cp_add_using_directive (processing_current_prefix
,
4476 strlen (previous_prefix
),
4477 strlen (processing_current_prefix
));
4480 if (die
->child
!= NULL
)
4482 struct die_info
*child_die
= die
->child
;
4484 while (child_die
&& child_die
->tag
)
4486 process_die (child_die
, cu
);
4487 child_die
= sibling_die (child_die
);
4491 processing_current_prefix
= previous_prefix
;
4492 do_cleanups (back_to
);
4495 /* Return the name of the namespace represented by DIE. Set
4496 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4500 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
4502 struct die_info
*current_die
;
4503 const char *name
= NULL
;
4505 /* Loop through the extensions until we find a name. */
4507 for (current_die
= die
;
4508 current_die
!= NULL
;
4509 current_die
= dwarf2_extension (die
, cu
))
4511 name
= dwarf2_name (current_die
, cu
);
4516 /* Is it an anonymous namespace? */
4518 *is_anonymous
= (name
== NULL
);
4520 name
= "(anonymous namespace)";
4525 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4526 the user defined type vector. */
4529 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4531 struct comp_unit_head
*cu_header
= &cu
->header
;
4533 struct attribute
*attr_byte_size
;
4534 struct attribute
*attr_address_class
;
4535 int byte_size
, addr_class
;
4542 type
= lookup_pointer_type (die_type (die
, cu
));
4544 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4546 byte_size
= DW_UNSND (attr_byte_size
);
4548 byte_size
= cu_header
->addr_size
;
4550 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
4551 if (attr_address_class
)
4552 addr_class
= DW_UNSND (attr_address_class
);
4554 addr_class
= DW_ADDR_none
;
4556 /* If the pointer size or address class is different than the
4557 default, create a type variant marked as such and set the
4558 length accordingly. */
4559 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
4561 if (gdbarch_address_class_type_flags_p (current_gdbarch
))
4565 type_flags
= gdbarch_address_class_type_flags
4566 (current_gdbarch
, byte_size
, addr_class
);
4567 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
4568 type
= make_type_with_address_space (type
, type_flags
);
4570 else if (TYPE_LENGTH (type
) != byte_size
)
4572 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
4575 /* Should we also complain about unhandled address classes? */
4579 TYPE_LENGTH (type
) = byte_size
;
4580 set_die_type (die
, type
, cu
);
4583 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4584 the user defined type vector. */
4587 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4589 struct objfile
*objfile
= cu
->objfile
;
4591 struct type
*to_type
;
4592 struct type
*domain
;
4599 to_type
= die_type (die
, cu
);
4600 domain
= die_containing_type (die
, cu
);
4602 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
4603 type
= lookup_methodptr_type (to_type
);
4605 type
= lookup_memberptr_type (to_type
, domain
);
4607 set_die_type (die
, type
, cu
);
4610 /* Extract all information from a DW_TAG_reference_type DIE and add to
4611 the user defined type vector. */
4614 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4616 struct comp_unit_head
*cu_header
= &cu
->header
;
4618 struct attribute
*attr
;
4625 type
= lookup_reference_type (die_type (die
, cu
));
4626 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4629 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4633 TYPE_LENGTH (type
) = cu_header
->addr_size
;
4635 set_die_type (die
, type
, cu
);
4639 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4641 struct type
*base_type
;
4648 base_type
= die_type (die
, cu
);
4649 set_die_type (die
, make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0),
4654 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4656 struct type
*base_type
;
4663 base_type
= die_type (die
, cu
);
4664 set_die_type (die
, make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0),
4668 /* Extract all information from a DW_TAG_string_type DIE and add to
4669 the user defined type vector. It isn't really a user defined type,
4670 but it behaves like one, with other DIE's using an AT_user_def_type
4671 attribute to reference it. */
4674 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4676 struct objfile
*objfile
= cu
->objfile
;
4677 struct type
*type
, *range_type
, *index_type
, *char_type
;
4678 struct attribute
*attr
;
4679 unsigned int length
;
4686 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
4689 length
= DW_UNSND (attr
);
4693 /* check for the DW_AT_byte_size attribute */
4694 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4697 length
= DW_UNSND (attr
);
4704 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
, cu
);
4705 range_type
= create_range_type (NULL
, index_type
, 1, length
);
4706 if (cu
->language
== language_fortran
)
4708 /* Need to create a unique string type for bounds
4710 type
= create_string_type (0, range_type
);
4714 char_type
= dwarf2_fundamental_type (objfile
, FT_CHAR
, cu
);
4715 type
= create_string_type (char_type
, range_type
);
4717 set_die_type (die
, type
, cu
);
4720 /* Handle DIES due to C code like:
4724 int (*funcp)(int a, long l);
4728 ('funcp' generates a DW_TAG_subroutine_type DIE)
4732 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4734 struct type
*type
; /* Type that this function returns */
4735 struct type
*ftype
; /* Function that returns above type */
4736 struct attribute
*attr
;
4738 /* Decode the type that this subroutine returns */
4743 type
= die_type (die
, cu
);
4744 ftype
= make_function_type (type
, (struct type
**) 0);
4746 /* All functions in C++, Pascal and Java have prototypes. */
4747 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
4748 if ((attr
&& (DW_UNSND (attr
) != 0))
4749 || cu
->language
== language_cplus
4750 || cu
->language
== language_java
4751 || cu
->language
== language_pascal
)
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 name
= dwarf2_name (die
, cu
);
4813 set_die_type (die
, init_type (TYPE_CODE_TYPEDEF
, 0,
4814 TYPE_FLAG_TARGET_STUB
, name
, objfile
),
4816 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, cu
);
4820 /* Find a representation of a given base type and install
4821 it in the TYPE field of the die. */
4824 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4826 struct objfile
*objfile
= cu
->objfile
;
4828 struct attribute
*attr
;
4829 int encoding
= 0, size
= 0;
4832 /* If we've already decoded this die, this is a no-op. */
4838 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
4841 encoding
= DW_UNSND (attr
);
4843 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4846 size
= DW_UNSND (attr
);
4848 name
= dwarf2_name (die
, cu
);
4851 enum type_code code
= TYPE_CODE_INT
;
4856 case DW_ATE_address
:
4857 /* Turn DW_ATE_address into a void * pointer. */
4858 code
= TYPE_CODE_PTR
;
4859 type_flags
|= TYPE_FLAG_UNSIGNED
;
4861 case DW_ATE_boolean
:
4862 code
= TYPE_CODE_BOOL
;
4863 type_flags
|= TYPE_FLAG_UNSIGNED
;
4865 case DW_ATE_complex_float
:
4866 code
= TYPE_CODE_COMPLEX
;
4868 case DW_ATE_decimal_float
:
4869 code
= TYPE_CODE_DECFLOAT
;
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
, name
, 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
;
4929 /* If we have already decoded this die, then nothing more to do. */
4933 base_type
= die_type (die
, cu
);
4934 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
4936 complaint (&symfile_complaints
,
4937 _("DW_AT_type missing from DW_TAG_subrange_type"));
4939 = dwarf_base_type (DW_ATE_signed
,
4940 gdbarch_addr_bit (current_gdbarch
) / 8, cu
);
4943 if (cu
->language
== language_fortran
)
4945 /* FORTRAN implies a lower bound of 1, if not given. */
4949 /* FIXME: For variable sized arrays either of these could be
4950 a variable rather than a constant value. We'll allow it,
4951 but we don't know how to handle it. */
4952 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
4954 low
= dwarf2_get_attr_constant_value (attr
, 0);
4956 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
4959 if (attr
->form
== DW_FORM_block1
)
4961 /* GCC encodes arrays with unspecified or dynamic length
4962 with a DW_FORM_block1 attribute.
4963 FIXME: GDB does not yet know how to handle dynamic
4964 arrays properly, treat them as arrays with unspecified
4967 FIXME: jimb/2003-09-22: GDB does not really know
4968 how to handle arrays of unspecified length
4969 either; we just represent them as zero-length
4970 arrays. Choose an appropriate upper bound given
4971 the lower bound we've computed above. */
4975 high
= dwarf2_get_attr_constant_value (attr
, 1);
4978 range_type
= create_range_type (NULL
, base_type
, low
, high
);
4980 name
= dwarf2_name (die
, cu
);
4982 TYPE_NAME (range_type
) = name
;
4984 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4986 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
4988 set_die_type (die
, range_type
, cu
);
4992 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4999 /* For now, we only support the C meaning of an unspecified type: void. */
5001 type
= init_type (TYPE_CODE_VOID
, 0, 0, dwarf2_name (die
, cu
),
5004 set_die_type (die
, type
, cu
);
5007 /* Read a whole compilation unit into a linked list of dies. */
5009 static struct die_info
*
5010 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5012 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5015 /* Read a single die and all its descendents. Set the die's sibling
5016 field to NULL; set other fields in the die correctly, and set all
5017 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5018 location of the info_ptr after reading all of those dies. PARENT
5019 is the parent of the die in question. */
5021 static struct die_info
*
5022 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5023 struct dwarf2_cu
*cu
,
5024 gdb_byte
**new_info_ptr
,
5025 struct die_info
*parent
)
5027 struct die_info
*die
;
5031 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5032 store_in_ref_table (die
->offset
, die
, cu
);
5036 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5042 *new_info_ptr
= cur_ptr
;
5045 die
->sibling
= NULL
;
5046 die
->parent
= parent
;
5050 /* Read a die, all of its descendents, and all of its siblings; set
5051 all of the fields of all of the dies correctly. Arguments are as
5052 in read_die_and_children. */
5054 static struct die_info
*
5055 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5056 struct dwarf2_cu
*cu
,
5057 gdb_byte
**new_info_ptr
,
5058 struct die_info
*parent
)
5060 struct die_info
*first_die
, *last_sibling
;
5064 first_die
= last_sibling
= NULL
;
5068 struct die_info
*die
5069 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5077 last_sibling
->sibling
= die
;
5082 *new_info_ptr
= cur_ptr
;
5092 /* Free a linked list of dies. */
5095 free_die_list (struct die_info
*dies
)
5097 struct die_info
*die
, *next
;
5102 if (die
->child
!= NULL
)
5103 free_die_list (die
->child
);
5104 next
= die
->sibling
;
5111 /* Read the contents of the section at OFFSET and of size SIZE from the
5112 object file specified by OBJFILE into the objfile_obstack and return it. */
5115 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5117 bfd
*abfd
= objfile
->obfd
;
5118 gdb_byte
*buf
, *retbuf
;
5119 bfd_size_type size
= bfd_get_section_size (sectp
);
5124 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5125 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5129 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5130 || bfd_bread (buf
, size
, abfd
) != size
)
5131 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5132 bfd_get_filename (abfd
));
5137 /* In DWARF version 2, the description of the debugging information is
5138 stored in a separate .debug_abbrev section. Before we read any
5139 dies from a section we read in all abbreviations and install them
5140 in a hash table. This function also sets flags in CU describing
5141 the data found in the abbrev table. */
5144 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5146 struct comp_unit_head
*cu_header
= &cu
->header
;
5147 gdb_byte
*abbrev_ptr
;
5148 struct abbrev_info
*cur_abbrev
;
5149 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5150 unsigned int abbrev_form
, hash_number
;
5151 struct attr_abbrev
*cur_attrs
;
5152 unsigned int allocated_attrs
;
5154 /* Initialize dwarf2 abbrevs */
5155 obstack_init (&cu
->abbrev_obstack
);
5156 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5158 * sizeof (struct abbrev_info
*)));
5159 memset (cu
->dwarf2_abbrevs
, 0,
5160 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5162 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5163 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5164 abbrev_ptr
+= bytes_read
;
5166 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5167 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5169 /* loop until we reach an abbrev number of 0 */
5170 while (abbrev_number
)
5172 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5174 /* read in abbrev header */
5175 cur_abbrev
->number
= abbrev_number
;
5176 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5177 abbrev_ptr
+= bytes_read
;
5178 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5181 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5182 cu
->has_namespace_info
= 1;
5184 /* now read in declarations */
5185 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5186 abbrev_ptr
+= bytes_read
;
5187 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5188 abbrev_ptr
+= bytes_read
;
5191 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5193 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5195 = xrealloc (cur_attrs
, (allocated_attrs
5196 * sizeof (struct attr_abbrev
)));
5199 /* Record whether this compilation unit might have
5200 inter-compilation-unit references. If we don't know what form
5201 this attribute will have, then it might potentially be a
5202 DW_FORM_ref_addr, so we conservatively expect inter-CU
5205 if (abbrev_form
== DW_FORM_ref_addr
5206 || abbrev_form
== DW_FORM_indirect
)
5207 cu
->has_form_ref_addr
= 1;
5209 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5210 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5211 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5212 abbrev_ptr
+= bytes_read
;
5213 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5214 abbrev_ptr
+= bytes_read
;
5217 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5218 (cur_abbrev
->num_attrs
5219 * sizeof (struct attr_abbrev
)));
5220 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5221 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5223 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5224 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5225 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5227 /* Get next abbreviation.
5228 Under Irix6 the abbreviations for a compilation unit are not
5229 always properly terminated with an abbrev number of 0.
5230 Exit loop if we encounter an abbreviation which we have
5231 already read (which means we are about to read the abbreviations
5232 for the next compile unit) or if the end of the abbreviation
5233 table is reached. */
5234 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5235 >= dwarf2_per_objfile
->abbrev_size
)
5237 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5238 abbrev_ptr
+= bytes_read
;
5239 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5246 /* Release the memory used by the abbrev table for a compilation unit. */
5249 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5251 struct dwarf2_cu
*cu
= ptr_to_cu
;
5253 obstack_free (&cu
->abbrev_obstack
, NULL
);
5254 cu
->dwarf2_abbrevs
= NULL
;
5257 /* Lookup an abbrev_info structure in the abbrev hash table. */
5259 static struct abbrev_info
*
5260 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5262 unsigned int hash_number
;
5263 struct abbrev_info
*abbrev
;
5265 hash_number
= number
% ABBREV_HASH_SIZE
;
5266 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5270 if (abbrev
->number
== number
)
5273 abbrev
= abbrev
->next
;
5278 /* Returns nonzero if TAG represents a type that we might generate a partial
5282 is_type_tag_for_partial (int tag
)
5287 /* Some types that would be reasonable to generate partial symbols for,
5288 that we don't at present. */
5289 case DW_TAG_array_type
:
5290 case DW_TAG_file_type
:
5291 case DW_TAG_ptr_to_member_type
:
5292 case DW_TAG_set_type
:
5293 case DW_TAG_string_type
:
5294 case DW_TAG_subroutine_type
:
5296 case DW_TAG_base_type
:
5297 case DW_TAG_class_type
:
5298 case DW_TAG_enumeration_type
:
5299 case DW_TAG_structure_type
:
5300 case DW_TAG_subrange_type
:
5301 case DW_TAG_typedef
:
5302 case DW_TAG_union_type
:
5309 /* Load all DIEs that are interesting for partial symbols into memory. */
5311 static struct partial_die_info
*
5312 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5313 struct dwarf2_cu
*cu
)
5315 struct partial_die_info
*part_die
;
5316 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5317 struct abbrev_info
*abbrev
;
5318 unsigned int bytes_read
;
5319 unsigned int load_all
= 0;
5321 int nesting_level
= 1;
5326 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5330 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5334 &cu
->comp_unit_obstack
,
5335 hashtab_obstack_allocate
,
5336 dummy_obstack_deallocate
);
5338 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5339 sizeof (struct partial_die_info
));
5343 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5345 /* A NULL abbrev means the end of a series of children. */
5348 if (--nesting_level
== 0)
5350 /* PART_DIE was probably the last thing allocated on the
5351 comp_unit_obstack, so we could call obstack_free
5352 here. We don't do that because the waste is small,
5353 and will be cleaned up when we're done with this
5354 compilation unit. This way, we're also more robust
5355 against other users of the comp_unit_obstack. */
5358 info_ptr
+= bytes_read
;
5359 last_die
= parent_die
;
5360 parent_die
= parent_die
->die_parent
;
5364 /* Check whether this DIE is interesting enough to save. Normally
5365 we would not be interested in members here, but there may be
5366 later variables referencing them via DW_AT_specification (for
5369 && !is_type_tag_for_partial (abbrev
->tag
)
5370 && abbrev
->tag
!= DW_TAG_enumerator
5371 && abbrev
->tag
!= DW_TAG_subprogram
5372 && abbrev
->tag
!= DW_TAG_variable
5373 && abbrev
->tag
!= DW_TAG_namespace
5374 && abbrev
->tag
!= DW_TAG_member
)
5376 /* Otherwise we skip to the next sibling, if any. */
5377 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5381 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5382 abfd
, info_ptr
, cu
);
5384 /* This two-pass algorithm for processing partial symbols has a
5385 high cost in cache pressure. Thus, handle some simple cases
5386 here which cover the majority of C partial symbols. DIEs
5387 which neither have specification tags in them, nor could have
5388 specification tags elsewhere pointing at them, can simply be
5389 processed and discarded.
5391 This segment is also optional; scan_partial_symbols and
5392 add_partial_symbol will handle these DIEs if we chain
5393 them in normally. When compilers which do not emit large
5394 quantities of duplicate debug information are more common,
5395 this code can probably be removed. */
5397 /* Any complete simple types at the top level (pretty much all
5398 of them, for a language without namespaces), can be processed
5400 if (parent_die
== NULL
5401 && part_die
->has_specification
== 0
5402 && part_die
->is_declaration
== 0
5403 && (part_die
->tag
== DW_TAG_typedef
5404 || part_die
->tag
== DW_TAG_base_type
5405 || part_die
->tag
== DW_TAG_subrange_type
))
5407 if (building_psymtab
&& part_die
->name
!= NULL
)
5408 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5409 VAR_DOMAIN
, LOC_TYPEDEF
,
5410 &cu
->objfile
->static_psymbols
,
5411 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5412 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5416 /* If we're at the second level, and we're an enumerator, and
5417 our parent has no specification (meaning possibly lives in a
5418 namespace elsewhere), then we can add the partial symbol now
5419 instead of queueing it. */
5420 if (part_die
->tag
== DW_TAG_enumerator
5421 && parent_die
!= NULL
5422 && parent_die
->die_parent
== NULL
5423 && parent_die
->tag
== DW_TAG_enumeration_type
5424 && parent_die
->has_specification
== 0)
5426 if (part_die
->name
== NULL
)
5427 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5428 else if (building_psymtab
)
5429 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5430 VAR_DOMAIN
, LOC_CONST
,
5431 (cu
->language
== language_cplus
5432 || cu
->language
== language_java
)
5433 ? &cu
->objfile
->global_psymbols
5434 : &cu
->objfile
->static_psymbols
,
5435 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5437 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5441 /* We'll save this DIE so link it in. */
5442 part_die
->die_parent
= parent_die
;
5443 part_die
->die_sibling
= NULL
;
5444 part_die
->die_child
= NULL
;
5446 if (last_die
&& last_die
== parent_die
)
5447 last_die
->die_child
= part_die
;
5449 last_die
->die_sibling
= part_die
;
5451 last_die
= part_die
;
5453 if (first_die
== NULL
)
5454 first_die
= part_die
;
5456 /* Maybe add the DIE to the hash table. Not all DIEs that we
5457 find interesting need to be in the hash table, because we
5458 also have the parent/sibling/child chains; only those that we
5459 might refer to by offset later during partial symbol reading.
5461 For now this means things that might have be the target of a
5462 DW_AT_specification, DW_AT_abstract_origin, or
5463 DW_AT_extension. DW_AT_extension will refer only to
5464 namespaces; DW_AT_abstract_origin refers to functions (and
5465 many things under the function DIE, but we do not recurse
5466 into function DIEs during partial symbol reading) and
5467 possibly variables as well; DW_AT_specification refers to
5468 declarations. Declarations ought to have the DW_AT_declaration
5469 flag. It happens that GCC forgets to put it in sometimes, but
5470 only for functions, not for types.
5472 Adding more things than necessary to the hash table is harmless
5473 except for the performance cost. Adding too few will result in
5474 wasted time in find_partial_die, when we reread the compilation
5475 unit with load_all_dies set. */
5478 || abbrev
->tag
== DW_TAG_subprogram
5479 || abbrev
->tag
== DW_TAG_variable
5480 || abbrev
->tag
== DW_TAG_namespace
5481 || part_die
->is_declaration
)
5485 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5486 part_die
->offset
, INSERT
);
5490 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5491 sizeof (struct partial_die_info
));
5493 /* For some DIEs we want to follow their children (if any). For C
5494 we have no reason to follow the children of structures; for other
5495 languages we have to, both so that we can get at method physnames
5496 to infer fully qualified class names, and for DW_AT_specification. */
5497 if (last_die
->has_children
5499 || last_die
->tag
== DW_TAG_namespace
5500 || last_die
->tag
== DW_TAG_enumeration_type
5501 || (cu
->language
!= language_c
5502 && (last_die
->tag
== DW_TAG_class_type
5503 || last_die
->tag
== DW_TAG_structure_type
5504 || last_die
->tag
== DW_TAG_union_type
))))
5507 parent_die
= last_die
;
5511 /* Otherwise we skip to the next sibling, if any. */
5512 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5514 /* Back to the top, do it again. */
5518 /* Read a minimal amount of information into the minimal die structure. */
5521 read_partial_die (struct partial_die_info
*part_die
,
5522 struct abbrev_info
*abbrev
,
5523 unsigned int abbrev_len
, bfd
*abfd
,
5524 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5526 unsigned int bytes_read
, i
;
5527 struct attribute attr
;
5528 int has_low_pc_attr
= 0;
5529 int has_high_pc_attr
= 0;
5531 memset (part_die
, 0, sizeof (struct partial_die_info
));
5533 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5535 info_ptr
+= abbrev_len
;
5540 part_die
->tag
= abbrev
->tag
;
5541 part_die
->has_children
= abbrev
->has_children
;
5543 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5545 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5547 /* Store the data if it is of an attribute we want to keep in a
5548 partial symbol table. */
5553 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5554 if (part_die
->name
== NULL
)
5555 part_die
->name
= DW_STRING (&attr
);
5557 case DW_AT_comp_dir
:
5558 if (part_die
->dirname
== NULL
)
5559 part_die
->dirname
= DW_STRING (&attr
);
5561 case DW_AT_MIPS_linkage_name
:
5562 part_die
->name
= DW_STRING (&attr
);
5565 has_low_pc_attr
= 1;
5566 part_die
->lowpc
= DW_ADDR (&attr
);
5569 has_high_pc_attr
= 1;
5570 part_die
->highpc
= DW_ADDR (&attr
);
5572 case DW_AT_location
:
5573 /* Support the .debug_loc offsets */
5574 if (attr_form_is_block (&attr
))
5576 part_die
->locdesc
= DW_BLOCK (&attr
);
5578 else if (attr
.form
== DW_FORM_data4
|| attr
.form
== DW_FORM_data8
)
5580 dwarf2_complex_location_expr_complaint ();
5584 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5585 "partial symbol information");
5588 case DW_AT_language
:
5589 part_die
->language
= DW_UNSND (&attr
);
5591 case DW_AT_external
:
5592 part_die
->is_external
= DW_UNSND (&attr
);
5594 case DW_AT_declaration
:
5595 part_die
->is_declaration
= DW_UNSND (&attr
);
5598 part_die
->has_type
= 1;
5600 case DW_AT_abstract_origin
:
5601 case DW_AT_specification
:
5602 case DW_AT_extension
:
5603 part_die
->has_specification
= 1;
5604 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5607 /* Ignore absolute siblings, they might point outside of
5608 the current compile unit. */
5609 if (attr
.form
== DW_FORM_ref_addr
)
5610 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5612 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5613 + dwarf2_get_ref_die_offset (&attr
, cu
);
5615 case DW_AT_stmt_list
:
5616 part_die
->has_stmt_list
= 1;
5617 part_die
->line_offset
= DW_UNSND (&attr
);
5619 case DW_AT_byte_size
:
5620 part_die
->has_byte_size
= 1;
5622 case DW_AT_calling_convention
:
5623 /* DWARF doesn't provide a way to identify a program's source-level
5624 entry point. DW_AT_calling_convention attributes are only meant
5625 to describe functions' calling conventions.
5627 However, because it's a necessary piece of information in
5628 Fortran, and because DW_CC_program is the only piece of debugging
5629 information whose definition refers to a 'main program' at all,
5630 several compilers have begun marking Fortran main programs with
5631 DW_CC_program --- even when those functions use the standard
5632 calling conventions.
5634 So until DWARF specifies a way to provide this information and
5635 compilers pick up the new representation, we'll support this
5637 if (DW_UNSND (&attr
) == DW_CC_program
5638 && cu
->language
== language_fortran
)
5639 set_main_name (part_die
->name
);
5646 /* When using the GNU linker, .gnu.linkonce. sections are used to
5647 eliminate duplicate copies of functions and vtables and such.
5648 The linker will arbitrarily choose one and discard the others.
5649 The AT_*_pc values for such functions refer to local labels in
5650 these sections. If the section from that file was discarded, the
5651 labels are not in the output, so the relocs get a value of 0.
5652 If this is a discarded function, mark the pc bounds as invalid,
5653 so that GDB will ignore it. */
5654 if (has_low_pc_attr
&& has_high_pc_attr
5655 && part_die
->lowpc
< part_die
->highpc
5656 && (part_die
->lowpc
!= 0
5657 || dwarf2_per_objfile
->has_section_at_zero
))
5658 part_die
->has_pc_info
= 1;
5662 /* Find a cached partial DIE at OFFSET in CU. */
5664 static struct partial_die_info
*
5665 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5667 struct partial_die_info
*lookup_die
= NULL
;
5668 struct partial_die_info part_die
;
5670 part_die
.offset
= offset
;
5671 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5676 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5678 static struct partial_die_info
*
5679 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5681 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5682 struct partial_die_info
*pd
= NULL
;
5684 if (offset
>= cu
->header
.offset
5685 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5687 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5692 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5694 if (per_cu
->cu
== NULL
)
5696 load_comp_unit (per_cu
, cu
->objfile
);
5697 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5698 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5701 per_cu
->cu
->last_used
= 0;
5702 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5704 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5706 struct cleanup
*back_to
;
5707 struct partial_die_info comp_unit_die
;
5708 struct abbrev_info
*abbrev
;
5709 unsigned int bytes_read
;
5712 per_cu
->load_all_dies
= 1;
5714 /* Re-read the DIEs. */
5715 back_to
= make_cleanup (null_cleanup
, 0);
5716 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
5718 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
5719 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
5721 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
5722 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
5723 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
5724 per_cu
->cu
->objfile
->obfd
, info_ptr
,
5726 if (comp_unit_die
.has_children
)
5727 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
5728 do_cleanups (back_to
);
5730 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5734 internal_error (__FILE__
, __LINE__
,
5735 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5736 offset
, bfd_get_filename (cu
->objfile
->obfd
));
5740 /* Adjust PART_DIE before generating a symbol for it. This function
5741 may set the is_external flag or change the DIE's name. */
5744 fixup_partial_die (struct partial_die_info
*part_die
,
5745 struct dwarf2_cu
*cu
)
5747 /* If we found a reference attribute and the DIE has no name, try
5748 to find a name in the referred to DIE. */
5750 if (part_die
->name
== NULL
&& part_die
->has_specification
)
5752 struct partial_die_info
*spec_die
;
5754 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
5756 fixup_partial_die (spec_die
, cu
);
5760 part_die
->name
= spec_die
->name
;
5762 /* Copy DW_AT_external attribute if it is set. */
5763 if (spec_die
->is_external
)
5764 part_die
->is_external
= spec_die
->is_external
;
5768 /* Set default names for some unnamed DIEs. */
5769 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
5770 || part_die
->tag
== DW_TAG_class_type
))
5771 part_die
->name
= "(anonymous class)";
5773 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
5774 part_die
->name
= "(anonymous namespace)";
5776 if (part_die
->tag
== DW_TAG_structure_type
5777 || part_die
->tag
== DW_TAG_class_type
5778 || part_die
->tag
== DW_TAG_union_type
)
5779 guess_structure_name (part_die
, cu
);
5782 /* Read the die from the .debug_info section buffer. Set DIEP to
5783 point to a newly allocated die with its information, except for its
5784 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5785 whether the die has children or not. */
5788 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
5789 struct dwarf2_cu
*cu
, int *has_children
)
5791 unsigned int abbrev_number
, bytes_read
, i
, offset
;
5792 struct abbrev_info
*abbrev
;
5793 struct die_info
*die
;
5795 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5796 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5797 info_ptr
+= bytes_read
;
5800 die
= dwarf_alloc_die ();
5802 die
->abbrev
= abbrev_number
;
5809 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
5812 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5814 bfd_get_filename (abfd
));
5816 die
= dwarf_alloc_die ();
5817 die
->offset
= offset
;
5818 die
->tag
= abbrev
->tag
;
5819 die
->abbrev
= abbrev_number
;
5822 die
->num_attrs
= abbrev
->num_attrs
;
5823 die
->attrs
= (struct attribute
*)
5824 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
5826 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5828 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
5829 abfd
, info_ptr
, cu
);
5831 /* If this attribute is an absolute reference to a different
5832 compilation unit, make sure that compilation unit is loaded
5834 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
5835 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
5836 || (DW_ADDR (&die
->attrs
[i
])
5837 >= cu
->header
.offset
+ cu
->header
.length
)))
5839 struct dwarf2_per_cu_data
*per_cu
;
5840 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
5843 /* Mark the dependence relation so that we don't flush PER_CU
5845 dwarf2_add_dependence (cu
, per_cu
);
5847 /* If it's already on the queue, we have nothing to do. */
5851 /* If the compilation unit is already loaded, just mark it as
5853 if (per_cu
->cu
!= NULL
)
5855 per_cu
->cu
->last_used
= 0;
5859 /* Add it to the queue. */
5860 queue_comp_unit (per_cu
);
5865 *has_children
= abbrev
->has_children
;
5869 /* Read an attribute value described by an attribute form. */
5872 read_attribute_value (struct attribute
*attr
, unsigned form
,
5873 bfd
*abfd
, gdb_byte
*info_ptr
,
5874 struct dwarf2_cu
*cu
)
5876 struct comp_unit_head
*cu_header
= &cu
->header
;
5877 unsigned int bytes_read
;
5878 struct dwarf_block
*blk
;
5884 case DW_FORM_ref_addr
:
5885 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
5886 info_ptr
+= bytes_read
;
5888 case DW_FORM_block2
:
5889 blk
= dwarf_alloc_block (cu
);
5890 blk
->size
= read_2_bytes (abfd
, info_ptr
);
5892 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5893 info_ptr
+= blk
->size
;
5894 DW_BLOCK (attr
) = blk
;
5896 case DW_FORM_block4
:
5897 blk
= dwarf_alloc_block (cu
);
5898 blk
->size
= read_4_bytes (abfd
, info_ptr
);
5900 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5901 info_ptr
+= blk
->size
;
5902 DW_BLOCK (attr
) = blk
;
5905 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
5909 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
5913 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
5916 case DW_FORM_string
:
5917 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
5918 info_ptr
+= bytes_read
;
5921 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
5923 info_ptr
+= bytes_read
;
5926 blk
= dwarf_alloc_block (cu
);
5927 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5928 info_ptr
+= bytes_read
;
5929 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5930 info_ptr
+= blk
->size
;
5931 DW_BLOCK (attr
) = blk
;
5933 case DW_FORM_block1
:
5934 blk
= dwarf_alloc_block (cu
);
5935 blk
->size
= read_1_byte (abfd
, info_ptr
);
5937 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5938 info_ptr
+= blk
->size
;
5939 DW_BLOCK (attr
) = blk
;
5942 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
5946 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
5950 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
5951 info_ptr
+= bytes_read
;
5954 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5955 info_ptr
+= bytes_read
;
5958 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
5962 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
5966 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
5970 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
5973 case DW_FORM_ref_udata
:
5974 DW_ADDR (attr
) = (cu
->header
.offset
5975 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
5976 info_ptr
+= bytes_read
;
5978 case DW_FORM_indirect
:
5979 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5980 info_ptr
+= bytes_read
;
5981 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
5984 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
5985 dwarf_form_name (form
),
5986 bfd_get_filename (abfd
));
5991 /* Read an attribute described by an abbreviated attribute. */
5994 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
5995 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5997 attr
->name
= abbrev
->name
;
5998 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
6001 /* read dwarf information from a buffer */
6004 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
6006 return bfd_get_8 (abfd
, buf
);
6010 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
6012 return bfd_get_signed_8 (abfd
, buf
);
6016 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
6018 return bfd_get_16 (abfd
, buf
);
6022 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6024 return bfd_get_signed_16 (abfd
, buf
);
6028 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6030 return bfd_get_32 (abfd
, buf
);
6034 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6036 return bfd_get_signed_32 (abfd
, buf
);
6039 static unsigned long
6040 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6042 return bfd_get_64 (abfd
, buf
);
6046 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6047 unsigned int *bytes_read
)
6049 struct comp_unit_head
*cu_header
= &cu
->header
;
6050 CORE_ADDR retval
= 0;
6052 if (cu_header
->signed_addr_p
)
6054 switch (cu_header
->addr_size
)
6057 retval
= bfd_get_signed_16 (abfd
, buf
);
6060 retval
= bfd_get_signed_32 (abfd
, buf
);
6063 retval
= bfd_get_signed_64 (abfd
, buf
);
6066 internal_error (__FILE__
, __LINE__
,
6067 _("read_address: bad switch, signed [in module %s]"),
6068 bfd_get_filename (abfd
));
6073 switch (cu_header
->addr_size
)
6076 retval
= bfd_get_16 (abfd
, buf
);
6079 retval
= bfd_get_32 (abfd
, buf
);
6082 retval
= bfd_get_64 (abfd
, buf
);
6085 internal_error (__FILE__
, __LINE__
,
6086 _("read_address: bad switch, unsigned [in module %s]"),
6087 bfd_get_filename (abfd
));
6091 *bytes_read
= cu_header
->addr_size
;
6095 /* Read the initial length from a section. The (draft) DWARF 3
6096 specification allows the initial length to take up either 4 bytes
6097 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6098 bytes describe the length and all offsets will be 8 bytes in length
6101 An older, non-standard 64-bit format is also handled by this
6102 function. The older format in question stores the initial length
6103 as an 8-byte quantity without an escape value. Lengths greater
6104 than 2^32 aren't very common which means that the initial 4 bytes
6105 is almost always zero. Since a length value of zero doesn't make
6106 sense for the 32-bit format, this initial zero can be considered to
6107 be an escape value which indicates the presence of the older 64-bit
6108 format. As written, the code can't detect (old format) lengths
6109 greater than 4GB. If it becomes necessary to handle lengths
6110 somewhat larger than 4GB, we could allow other small values (such
6111 as the non-sensical values of 1, 2, and 3) to also be used as
6112 escape values indicating the presence of the old format.
6114 The value returned via bytes_read should be used to increment the
6115 relevant pointer after calling read_initial_length().
6117 As a side effect, this function sets the fields initial_length_size
6118 and offset_size in cu_header to the values appropriate for the
6119 length field. (The format of the initial length field determines
6120 the width of file offsets to be fetched later with read_offset().)
6122 [ Note: read_initial_length() and read_offset() are based on the
6123 document entitled "DWARF Debugging Information Format", revision
6124 3, draft 8, dated November 19, 2001. This document was obtained
6127 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6129 This document is only a draft and is subject to change. (So beware.)
6131 Details regarding the older, non-standard 64-bit format were
6132 determined empirically by examining 64-bit ELF files produced by
6133 the SGI toolchain on an IRIX 6.5 machine.
6135 - Kevin, July 16, 2002
6139 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6140 unsigned int *bytes_read
)
6142 LONGEST length
= bfd_get_32 (abfd
, buf
);
6144 if (length
== 0xffffffff)
6146 length
= bfd_get_64 (abfd
, buf
+ 4);
6149 else if (length
== 0)
6151 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6152 length
= bfd_get_64 (abfd
, buf
);
6162 gdb_assert (cu_header
->initial_length_size
== 0
6163 || cu_header
->initial_length_size
== 4
6164 || cu_header
->initial_length_size
== 8
6165 || cu_header
->initial_length_size
== 12);
6167 if (cu_header
->initial_length_size
!= 0
6168 && cu_header
->initial_length_size
!= *bytes_read
)
6169 complaint (&symfile_complaints
,
6170 _("intermixed 32-bit and 64-bit DWARF sections"));
6172 cu_header
->initial_length_size
= *bytes_read
;
6173 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6179 /* Read an offset from the data stream. The size of the offset is
6180 given by cu_header->offset_size. */
6183 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6184 unsigned int *bytes_read
)
6188 switch (cu_header
->offset_size
)
6191 retval
= bfd_get_32 (abfd
, buf
);
6195 retval
= bfd_get_64 (abfd
, buf
);
6199 internal_error (__FILE__
, __LINE__
,
6200 _("read_offset: bad switch [in module %s]"),
6201 bfd_get_filename (abfd
));
6208 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6210 /* If the size of a host char is 8 bits, we can return a pointer
6211 to the buffer, otherwise we have to copy the data to a buffer
6212 allocated on the temporary obstack. */
6213 gdb_assert (HOST_CHAR_BIT
== 8);
6218 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6220 /* If the size of a host char is 8 bits, we can return a pointer
6221 to the string, otherwise we have to copy the string to a buffer
6222 allocated on the temporary obstack. */
6223 gdb_assert (HOST_CHAR_BIT
== 8);
6226 *bytes_read_ptr
= 1;
6229 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6230 return (char *) buf
;
6234 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6235 const struct comp_unit_head
*cu_header
,
6236 unsigned int *bytes_read_ptr
)
6238 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6241 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6243 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6244 bfd_get_filename (abfd
));
6247 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6249 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6250 bfd_get_filename (abfd
));
6253 gdb_assert (HOST_CHAR_BIT
== 8);
6254 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6256 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6259 static unsigned long
6260 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6262 unsigned long result
;
6263 unsigned int num_read
;
6273 byte
= bfd_get_8 (abfd
, buf
);
6276 result
|= ((unsigned long)(byte
& 127) << shift
);
6277 if ((byte
& 128) == 0)
6283 *bytes_read_ptr
= num_read
;
6288 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6291 int i
, shift
, num_read
;
6300 byte
= bfd_get_8 (abfd
, buf
);
6303 result
|= ((long)(byte
& 127) << shift
);
6305 if ((byte
& 128) == 0)
6310 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6311 result
|= -(((long)1) << shift
);
6312 *bytes_read_ptr
= num_read
;
6316 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6319 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6325 byte
= bfd_get_8 (abfd
, buf
);
6327 if ((byte
& 128) == 0)
6333 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6339 cu
->language
= language_c
;
6341 case DW_LANG_C_plus_plus
:
6342 cu
->language
= language_cplus
;
6344 case DW_LANG_Fortran77
:
6345 case DW_LANG_Fortran90
:
6346 case DW_LANG_Fortran95
:
6347 cu
->language
= language_fortran
;
6349 case DW_LANG_Mips_Assembler
:
6350 cu
->language
= language_asm
;
6353 cu
->language
= language_java
;
6357 cu
->language
= language_ada
;
6359 case DW_LANG_Modula2
:
6360 cu
->language
= language_m2
;
6362 case DW_LANG_Pascal83
:
6363 cu
->language
= language_pascal
;
6365 case DW_LANG_Cobol74
:
6366 case DW_LANG_Cobol85
:
6368 cu
->language
= language_minimal
;
6371 cu
->language_defn
= language_def (cu
->language
);
6374 /* Return the named attribute or NULL if not there. */
6376 static struct attribute
*
6377 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6380 struct attribute
*spec
= NULL
;
6382 for (i
= 0; i
< die
->num_attrs
; ++i
)
6384 if (die
->attrs
[i
].name
== name
)
6385 return &die
->attrs
[i
];
6386 if (die
->attrs
[i
].name
== DW_AT_specification
6387 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6388 spec
= &die
->attrs
[i
];
6392 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6397 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6398 and holds a non-zero value. This function should only be used for
6399 DW_FORM_flag attributes. */
6402 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6404 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6406 return (attr
&& DW_UNSND (attr
));
6410 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6412 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6413 which value is non-zero. However, we have to be careful with
6414 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6415 (via dwarf2_flag_true_p) follows this attribute. So we may
6416 end up accidently finding a declaration attribute that belongs
6417 to a different DIE referenced by the specification attribute,
6418 even though the given DIE does not have a declaration attribute. */
6419 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6420 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6423 /* Return the die giving the specification for DIE, if there is
6426 static struct die_info
*
6427 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6429 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6431 if (spec_attr
== NULL
)
6434 return follow_die_ref (die
, spec_attr
, cu
);
6437 /* Free the line_header structure *LH, and any arrays and strings it
6440 free_line_header (struct line_header
*lh
)
6442 if (lh
->standard_opcode_lengths
)
6443 xfree (lh
->standard_opcode_lengths
);
6445 /* Remember that all the lh->file_names[i].name pointers are
6446 pointers into debug_line_buffer, and don't need to be freed. */
6448 xfree (lh
->file_names
);
6450 /* Similarly for the include directory names. */
6451 if (lh
->include_dirs
)
6452 xfree (lh
->include_dirs
);
6458 /* Add an entry to LH's include directory table. */
6460 add_include_dir (struct line_header
*lh
, char *include_dir
)
6462 /* Grow the array if necessary. */
6463 if (lh
->include_dirs_size
== 0)
6465 lh
->include_dirs_size
= 1; /* for testing */
6466 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6467 * sizeof (*lh
->include_dirs
));
6469 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6471 lh
->include_dirs_size
*= 2;
6472 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6473 (lh
->include_dirs_size
6474 * sizeof (*lh
->include_dirs
)));
6477 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6481 /* Add an entry to LH's file name table. */
6483 add_file_name (struct line_header
*lh
,
6485 unsigned int dir_index
,
6486 unsigned int mod_time
,
6487 unsigned int length
)
6489 struct file_entry
*fe
;
6491 /* Grow the array if necessary. */
6492 if (lh
->file_names_size
== 0)
6494 lh
->file_names_size
= 1; /* for testing */
6495 lh
->file_names
= xmalloc (lh
->file_names_size
6496 * sizeof (*lh
->file_names
));
6498 else if (lh
->num_file_names
>= lh
->file_names_size
)
6500 lh
->file_names_size
*= 2;
6501 lh
->file_names
= xrealloc (lh
->file_names
,
6502 (lh
->file_names_size
6503 * sizeof (*lh
->file_names
)));
6506 fe
= &lh
->file_names
[lh
->num_file_names
++];
6508 fe
->dir_index
= dir_index
;
6509 fe
->mod_time
= mod_time
;
6510 fe
->length
= length
;
6516 /* Read the statement program header starting at OFFSET in
6517 .debug_line, according to the endianness of ABFD. Return a pointer
6518 to a struct line_header, allocated using xmalloc.
6520 NOTE: the strings in the include directory and file name tables of
6521 the returned object point into debug_line_buffer, and must not be
6523 static struct line_header
*
6524 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6525 struct dwarf2_cu
*cu
)
6527 struct cleanup
*back_to
;
6528 struct line_header
*lh
;
6530 unsigned int bytes_read
;
6532 char *cur_dir
, *cur_file
;
6534 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6536 complaint (&symfile_complaints
, _("missing .debug_line section"));
6540 /* Make sure that at least there's room for the total_length field.
6541 That could be 12 bytes long, but we're just going to fudge that. */
6542 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6544 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6548 lh
= xmalloc (sizeof (*lh
));
6549 memset (lh
, 0, sizeof (*lh
));
6550 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6553 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6555 /* Read in the header. */
6557 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6558 line_ptr
+= bytes_read
;
6559 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6560 + dwarf2_per_objfile
->line_size
))
6562 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6565 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6566 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6568 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6569 line_ptr
+= bytes_read
;
6570 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6572 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6574 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6576 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6578 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6580 lh
->standard_opcode_lengths
6581 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6583 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6584 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6586 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6590 /* Read directory table. */
6591 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6593 line_ptr
+= bytes_read
;
6594 add_include_dir (lh
, cur_dir
);
6596 line_ptr
+= bytes_read
;
6598 /* Read file name table. */
6599 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6601 unsigned int dir_index
, mod_time
, length
;
6603 line_ptr
+= bytes_read
;
6604 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6605 line_ptr
+= bytes_read
;
6606 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6607 line_ptr
+= bytes_read
;
6608 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6609 line_ptr
+= bytes_read
;
6611 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6613 line_ptr
+= bytes_read
;
6614 lh
->statement_program_start
= line_ptr
;
6616 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6617 + dwarf2_per_objfile
->line_size
))
6618 complaint (&symfile_complaints
,
6619 _("line number info header doesn't fit in `.debug_line' section"));
6621 discard_cleanups (back_to
);
6625 /* This function exists to work around a bug in certain compilers
6626 (particularly GCC 2.95), in which the first line number marker of a
6627 function does not show up until after the prologue, right before
6628 the second line number marker. This function shifts ADDRESS down
6629 to the beginning of the function if necessary, and is called on
6630 addresses passed to record_line. */
6633 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6635 struct function_range
*fn
;
6637 /* Find the function_range containing address. */
6642 cu
->cached_fn
= cu
->first_fn
;
6646 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6652 while (fn
&& fn
!= cu
->cached_fn
)
6653 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6663 if (address
!= fn
->lowpc
)
6664 complaint (&symfile_complaints
,
6665 _("misplaced first line number at 0x%lx for '%s'"),
6666 (unsigned long) address
, fn
->name
);
6671 /* Decode the Line Number Program (LNP) for the given line_header
6672 structure and CU. The actual information extracted and the type
6673 of structures created from the LNP depends on the value of PST.
6675 1. If PST is NULL, then this procedure uses the data from the program
6676 to create all necessary symbol tables, and their linetables.
6677 The compilation directory of the file is passed in COMP_DIR,
6678 and must not be NULL.
6680 2. If PST is not NULL, this procedure reads the program to determine
6681 the list of files included by the unit represented by PST, and
6682 builds all the associated partial symbol tables. In this case,
6683 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6684 is not used to compute the full name of the symtab, and therefore
6685 omitting it when building the partial symtab does not introduce
6686 the potential for inconsistency - a partial symtab and its associated
6687 symbtab having a different fullname -). */
6690 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6691 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6693 gdb_byte
*line_ptr
, *extended_end
;
6695 unsigned int bytes_read
, extended_len
;
6696 unsigned char op_code
, extended_op
, adj_opcode
;
6698 struct objfile
*objfile
= cu
->objfile
;
6699 const int decode_for_pst_p
= (pst
!= NULL
);
6700 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6702 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6704 line_ptr
= lh
->statement_program_start
;
6705 line_end
= lh
->statement_program_end
;
6707 /* Read the statement sequences until there's nothing left. */
6708 while (line_ptr
< line_end
)
6710 /* state machine registers */
6711 CORE_ADDR address
= 0;
6712 unsigned int file
= 1;
6713 unsigned int line
= 1;
6714 unsigned int column
= 0;
6715 int is_stmt
= lh
->default_is_stmt
;
6716 int basic_block
= 0;
6717 int end_sequence
= 0;
6719 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
6721 /* Start a subfile for the current file of the state machine. */
6722 /* lh->include_dirs and lh->file_names are 0-based, but the
6723 directory and file name numbers in the statement program
6725 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
6729 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6731 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6734 /* Decode the table. */
6735 while (!end_sequence
)
6737 op_code
= read_1_byte (abfd
, line_ptr
);
6740 if (op_code
>= lh
->opcode_base
)
6742 /* Special operand. */
6743 adj_opcode
= op_code
- lh
->opcode_base
;
6744 address
+= (adj_opcode
/ lh
->line_range
)
6745 * lh
->minimum_instruction_length
;
6746 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
6747 if (lh
->num_file_names
< file
)
6748 dwarf2_debug_line_missing_file_complaint ();
6751 lh
->file_names
[file
- 1].included_p
= 1;
6752 if (!decode_for_pst_p
)
6754 if (last_subfile
!= current_subfile
)
6757 record_line (last_subfile
, 0, address
);
6758 last_subfile
= current_subfile
;
6760 /* Append row to matrix using current values. */
6761 record_line (current_subfile
, line
,
6762 check_cu_functions (address
, cu
));
6767 else switch (op_code
)
6769 case DW_LNS_extended_op
:
6770 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6771 line_ptr
+= bytes_read
;
6772 extended_end
= line_ptr
+ extended_len
;
6773 extended_op
= read_1_byte (abfd
, line_ptr
);
6775 switch (extended_op
)
6777 case DW_LNE_end_sequence
:
6780 if (lh
->num_file_names
< file
)
6781 dwarf2_debug_line_missing_file_complaint ();
6784 lh
->file_names
[file
- 1].included_p
= 1;
6785 if (!decode_for_pst_p
)
6786 record_line (current_subfile
, 0, address
);
6789 case DW_LNE_set_address
:
6790 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
6791 line_ptr
+= bytes_read
;
6792 address
+= baseaddr
;
6794 case DW_LNE_define_file
:
6797 unsigned int dir_index
, mod_time
, length
;
6799 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
6800 line_ptr
+= bytes_read
;
6802 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6803 line_ptr
+= bytes_read
;
6805 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6806 line_ptr
+= bytes_read
;
6808 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6809 line_ptr
+= bytes_read
;
6810 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6814 complaint (&symfile_complaints
,
6815 _("mangled .debug_line section"));
6818 /* Make sure that we parsed the extended op correctly. If e.g.
6819 we expected a different address size than the producer used,
6820 we may have read the wrong number of bytes. */
6821 if (line_ptr
!= extended_end
)
6823 complaint (&symfile_complaints
,
6824 _("mangled .debug_line section"));
6829 if (lh
->num_file_names
< file
)
6830 dwarf2_debug_line_missing_file_complaint ();
6833 lh
->file_names
[file
- 1].included_p
= 1;
6834 if (!decode_for_pst_p
)
6836 if (last_subfile
!= current_subfile
)
6839 record_line (last_subfile
, 0, address
);
6840 last_subfile
= current_subfile
;
6842 record_line (current_subfile
, line
,
6843 check_cu_functions (address
, cu
));
6848 case DW_LNS_advance_pc
:
6849 address
+= lh
->minimum_instruction_length
6850 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6851 line_ptr
+= bytes_read
;
6853 case DW_LNS_advance_line
:
6854 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
6855 line_ptr
+= bytes_read
;
6857 case DW_LNS_set_file
:
6859 /* The arrays lh->include_dirs and lh->file_names are
6860 0-based, but the directory and file name numbers in
6861 the statement program are 1-based. */
6862 struct file_entry
*fe
;
6865 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6866 line_ptr
+= bytes_read
;
6867 if (lh
->num_file_names
< file
)
6868 dwarf2_debug_line_missing_file_complaint ();
6871 fe
= &lh
->file_names
[file
- 1];
6873 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6874 if (!decode_for_pst_p
)
6876 last_subfile
= current_subfile
;
6877 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6882 case DW_LNS_set_column
:
6883 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6884 line_ptr
+= bytes_read
;
6886 case DW_LNS_negate_stmt
:
6887 is_stmt
= (!is_stmt
);
6889 case DW_LNS_set_basic_block
:
6892 /* Add to the address register of the state machine the
6893 address increment value corresponding to special opcode
6894 255. I.e., this value is scaled by the minimum
6895 instruction length since special opcode 255 would have
6896 scaled the the increment. */
6897 case DW_LNS_const_add_pc
:
6898 address
+= (lh
->minimum_instruction_length
6899 * ((255 - lh
->opcode_base
) / lh
->line_range
));
6901 case DW_LNS_fixed_advance_pc
:
6902 address
+= read_2_bytes (abfd
, line_ptr
);
6907 /* Unknown standard opcode, ignore it. */
6910 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
6912 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6913 line_ptr
+= bytes_read
;
6920 if (decode_for_pst_p
)
6924 /* Now that we're done scanning the Line Header Program, we can
6925 create the psymtab of each included file. */
6926 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
6927 if (lh
->file_names
[file_index
].included_p
== 1)
6929 const struct file_entry fe
= lh
->file_names
[file_index
];
6930 char *include_name
= fe
.name
;
6931 char *dir_name
= NULL
;
6932 char *pst_filename
= pst
->filename
;
6935 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
6937 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
6939 include_name
= concat (dir_name
, SLASH_STRING
,
6940 include_name
, (char *)NULL
);
6941 make_cleanup (xfree
, include_name
);
6944 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
6946 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
6947 pst_filename
, (char *)NULL
);
6948 make_cleanup (xfree
, pst_filename
);
6951 if (strcmp (include_name
, pst_filename
) != 0)
6952 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
6957 /* Make sure a symtab is created for every file, even files
6958 which contain only variables (i.e. no code with associated
6962 struct file_entry
*fe
;
6964 for (i
= 0; i
< lh
->num_file_names
; i
++)
6967 fe
= &lh
->file_names
[i
];
6969 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6970 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6972 /* Skip the main file; we don't need it, and it must be
6973 allocated last, so that it will show up before the
6974 non-primary symtabs in the objfile's symtab list. */
6975 if (current_subfile
== first_subfile
)
6978 if (current_subfile
->symtab
== NULL
)
6979 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
6981 fe
->symtab
= current_subfile
->symtab
;
6986 /* Start a subfile for DWARF. FILENAME is the name of the file and
6987 DIRNAME the name of the source directory which contains FILENAME
6988 or NULL if not known. COMP_DIR is the compilation directory for the
6989 linetable's compilation unit or NULL if not known.
6990 This routine tries to keep line numbers from identical absolute and
6991 relative file names in a common subfile.
6993 Using the `list' example from the GDB testsuite, which resides in
6994 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
6995 of /srcdir/list0.c yields the following debugging information for list0.c:
6997 DW_AT_name: /srcdir/list0.c
6998 DW_AT_comp_dir: /compdir
6999 files.files[0].name: list0.h
7000 files.files[0].dir: /srcdir
7001 files.files[1].name: list0.c
7002 files.files[1].dir: /srcdir
7004 The line number information for list0.c has to end up in a single
7005 subfile, so that `break /srcdir/list0.c:1' works as expected.
7006 start_subfile will ensure that this happens provided that we pass the
7007 concatenation of files.files[1].dir and files.files[1].name as the
7011 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
7015 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7016 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7017 second argument to start_subfile. To be consistent, we do the
7018 same here. In order not to lose the line information directory,
7019 we concatenate it to the filename when it makes sense.
7020 Note that the Dwarf3 standard says (speaking of filenames in line
7021 information): ``The directory index is ignored for file names
7022 that represent full path names''. Thus ignoring dirname in the
7023 `else' branch below isn't an issue. */
7025 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7026 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7028 fullname
= filename
;
7030 start_subfile (fullname
, comp_dir
);
7032 if (fullname
!= filename
)
7037 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7038 struct dwarf2_cu
*cu
)
7040 struct objfile
*objfile
= cu
->objfile
;
7041 struct comp_unit_head
*cu_header
= &cu
->header
;
7043 /* NOTE drow/2003-01-30: There used to be a comment and some special
7044 code here to turn a symbol with DW_AT_external and a
7045 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7046 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7047 with some versions of binutils) where shared libraries could have
7048 relocations against symbols in their debug information - the
7049 minimal symbol would have the right address, but the debug info
7050 would not. It's no longer necessary, because we will explicitly
7051 apply relocations when we read in the debug information now. */
7053 /* A DW_AT_location attribute with no contents indicates that a
7054 variable has been optimized away. */
7055 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7057 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7061 /* Handle one degenerate form of location expression specially, to
7062 preserve GDB's previous behavior when section offsets are
7063 specified. If this is just a DW_OP_addr then mark this symbol
7066 if (attr_form_is_block (attr
)
7067 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7068 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7072 SYMBOL_VALUE_ADDRESS (sym
) =
7073 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7074 fixup_symbol_section (sym
, objfile
);
7075 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7076 SYMBOL_SECTION (sym
));
7077 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7081 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7082 expression evaluator, and use LOC_COMPUTED only when necessary
7083 (i.e. when the value of a register or memory location is
7084 referenced, or a thread-local block, etc.). Then again, it might
7085 not be worthwhile. I'm assuming that it isn't unless performance
7086 or memory numbers show me otherwise. */
7088 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7089 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7092 /* Given a pointer to a DWARF information entry, figure out if we need
7093 to make a symbol table entry for it, and if so, create a new entry
7094 and return a pointer to it.
7095 If TYPE is NULL, determine symbol type from the die, otherwise
7096 used the passed type. */
7098 static struct symbol
*
7099 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7101 struct objfile
*objfile
= cu
->objfile
;
7102 struct symbol
*sym
= NULL
;
7104 struct attribute
*attr
= NULL
;
7105 struct attribute
*attr2
= NULL
;
7108 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7110 if (die
->tag
!= DW_TAG_namespace
)
7111 name
= dwarf2_linkage_name (die
, cu
);
7113 name
= TYPE_NAME (type
);
7117 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7118 sizeof (struct symbol
));
7119 OBJSTAT (objfile
, n_syms
++);
7120 memset (sym
, 0, sizeof (struct symbol
));
7122 /* Cache this symbol's name and the name's demangled form (if any). */
7123 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7124 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7126 /* Default assumptions.
7127 Use the passed type or decode it from the die. */
7128 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7129 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7131 SYMBOL_TYPE (sym
) = type
;
7133 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7134 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7137 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7140 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7143 int file_index
= DW_UNSND (attr
);
7144 if (cu
->line_header
== NULL
7145 || file_index
> cu
->line_header
->num_file_names
)
7146 complaint (&symfile_complaints
,
7147 _("file index out of range"));
7148 else if (file_index
> 0)
7150 struct file_entry
*fe
;
7151 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7152 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7159 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7162 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7164 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7166 case DW_TAG_subprogram
:
7167 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7169 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7170 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7171 if (attr2
&& (DW_UNSND (attr2
) != 0))
7173 add_symbol_to_list (sym
, &global_symbols
);
7177 add_symbol_to_list (sym
, cu
->list_in_scope
);
7180 case DW_TAG_variable
:
7181 /* Compilation with minimal debug info may result in variables
7182 with missing type entries. Change the misleading `void' type
7183 to something sensible. */
7184 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7186 = builtin_type (current_gdbarch
)->nodebug_data_symbol
;
7188 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7191 dwarf2_const_value (attr
, sym
, cu
);
7192 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7193 if (attr2
&& (DW_UNSND (attr2
) != 0))
7194 add_symbol_to_list (sym
, &global_symbols
);
7196 add_symbol_to_list (sym
, cu
->list_in_scope
);
7199 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7202 var_decode_location (attr
, sym
, cu
);
7203 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7204 if (attr2
&& (DW_UNSND (attr2
) != 0))
7205 add_symbol_to_list (sym
, &global_symbols
);
7207 add_symbol_to_list (sym
, cu
->list_in_scope
);
7211 /* We do not know the address of this symbol.
7212 If it is an external symbol and we have type information
7213 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7214 The address of the variable will then be determined from
7215 the minimal symbol table whenever the variable is
7217 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7218 if (attr2
&& (DW_UNSND (attr2
) != 0)
7219 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7221 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7222 add_symbol_to_list (sym
, &global_symbols
);
7226 case DW_TAG_formal_parameter
:
7227 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7230 var_decode_location (attr
, sym
, cu
);
7231 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7232 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
7233 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
7235 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7238 dwarf2_const_value (attr
, sym
, cu
);
7240 add_symbol_to_list (sym
, cu
->list_in_scope
);
7242 case DW_TAG_unspecified_parameters
:
7243 /* From varargs functions; gdb doesn't seem to have any
7244 interest in this information, so just ignore it for now.
7247 case DW_TAG_class_type
:
7248 case DW_TAG_structure_type
:
7249 case DW_TAG_union_type
:
7250 case DW_TAG_set_type
:
7251 case DW_TAG_enumeration_type
:
7252 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7253 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7255 /* Make sure that the symbol includes appropriate enclosing
7256 classes/namespaces in its name. These are calculated in
7257 read_structure_type, and the correct name is saved in
7260 if (cu
->language
== language_cplus
7261 || cu
->language
== language_java
)
7263 struct type
*type
= SYMBOL_TYPE (sym
);
7265 if (TYPE_TAG_NAME (type
) != NULL
)
7267 /* FIXME: carlton/2003-11-10: Should this use
7268 SYMBOL_SET_NAMES instead? (The same problem also
7269 arises further down in this function.) */
7270 /* The type's name is already allocated along with
7271 this objfile, so we don't need to duplicate it
7273 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7278 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7279 really ever be static objects: otherwise, if you try
7280 to, say, break of a class's method and you're in a file
7281 which doesn't mention that class, it won't work unless
7282 the check for all static symbols in lookup_symbol_aux
7283 saves you. See the OtherFileClass tests in
7284 gdb.c++/namespace.exp. */
7286 struct pending
**list_to_add
;
7288 list_to_add
= (cu
->list_in_scope
== &file_symbols
7289 && (cu
->language
== language_cplus
7290 || cu
->language
== language_java
)
7291 ? &global_symbols
: cu
->list_in_scope
);
7293 add_symbol_to_list (sym
, list_to_add
);
7295 /* The semantics of C++ state that "struct foo { ... }" also
7296 defines a typedef for "foo". A Java class declaration also
7297 defines a typedef for the class. Synthesize a typedef symbol
7298 so that "ptype foo" works as expected. */
7299 if (cu
->language
== language_cplus
7300 || cu
->language
== language_java
7301 || cu
->language
== language_ada
)
7303 struct symbol
*typedef_sym
= (struct symbol
*)
7304 obstack_alloc (&objfile
->objfile_obstack
,
7305 sizeof (struct symbol
));
7306 *typedef_sym
= *sym
;
7307 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
7308 /* The symbol's name is already allocated along with
7309 this objfile, so we don't need to duplicate it for
7311 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7312 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7313 add_symbol_to_list (typedef_sym
, list_to_add
);
7317 case DW_TAG_typedef
:
7318 if (processing_has_namespace_info
7319 && processing_current_prefix
[0] != '\0')
7321 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7322 processing_current_prefix
,
7325 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7326 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7327 add_symbol_to_list (sym
, cu
->list_in_scope
);
7329 case DW_TAG_base_type
:
7330 case DW_TAG_subrange_type
:
7331 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7332 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7333 add_symbol_to_list (sym
, cu
->list_in_scope
);
7335 case DW_TAG_enumerator
:
7336 if (processing_has_namespace_info
7337 && processing_current_prefix
[0] != '\0')
7339 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7340 processing_current_prefix
,
7343 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7346 dwarf2_const_value (attr
, sym
, cu
);
7349 /* NOTE: carlton/2003-11-10: See comment above in the
7350 DW_TAG_class_type, etc. block. */
7352 struct pending
**list_to_add
;
7354 list_to_add
= (cu
->list_in_scope
== &file_symbols
7355 && (cu
->language
== language_cplus
7356 || cu
->language
== language_java
)
7357 ? &global_symbols
: cu
->list_in_scope
);
7359 add_symbol_to_list (sym
, list_to_add
);
7362 case DW_TAG_namespace
:
7363 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7364 add_symbol_to_list (sym
, &global_symbols
);
7367 /* Not a tag we recognize. Hopefully we aren't processing
7368 trash data, but since we must specifically ignore things
7369 we don't recognize, there is nothing else we should do at
7371 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7372 dwarf_tag_name (die
->tag
));
7379 /* Copy constant value from an attribute to a symbol. */
7382 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7383 struct dwarf2_cu
*cu
)
7385 struct objfile
*objfile
= cu
->objfile
;
7386 struct comp_unit_head
*cu_header
= &cu
->header
;
7387 struct dwarf_block
*blk
;
7392 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7393 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7394 cu_header
->addr_size
,
7395 TYPE_LENGTH (SYMBOL_TYPE
7397 SYMBOL_VALUE_BYTES (sym
) =
7398 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7399 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7400 it's body - store_unsigned_integer. */
7401 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7403 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7405 case DW_FORM_block1
:
7406 case DW_FORM_block2
:
7407 case DW_FORM_block4
:
7409 blk
= DW_BLOCK (attr
);
7410 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7411 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7413 TYPE_LENGTH (SYMBOL_TYPE
7415 SYMBOL_VALUE_BYTES (sym
) =
7416 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7417 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7418 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7421 /* The DW_AT_const_value attributes are supposed to carry the
7422 symbol's value "represented as it would be on the target
7423 architecture." By the time we get here, it's already been
7424 converted to host endianness, so we just need to sign- or
7425 zero-extend it as appropriate. */
7427 dwarf2_const_value_data (attr
, sym
, 8);
7430 dwarf2_const_value_data (attr
, sym
, 16);
7433 dwarf2_const_value_data (attr
, sym
, 32);
7436 dwarf2_const_value_data (attr
, sym
, 64);
7440 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7441 SYMBOL_CLASS (sym
) = LOC_CONST
;
7445 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7446 SYMBOL_CLASS (sym
) = LOC_CONST
;
7450 complaint (&symfile_complaints
,
7451 _("unsupported const value attribute form: '%s'"),
7452 dwarf_form_name (attr
->form
));
7453 SYMBOL_VALUE (sym
) = 0;
7454 SYMBOL_CLASS (sym
) = LOC_CONST
;
7460 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7461 or zero-extend it as appropriate for the symbol's type. */
7463 dwarf2_const_value_data (struct attribute
*attr
,
7467 LONGEST l
= DW_UNSND (attr
);
7469 if (bits
< sizeof (l
) * 8)
7471 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7472 l
&= ((LONGEST
) 1 << bits
) - 1;
7474 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7477 SYMBOL_VALUE (sym
) = l
;
7478 SYMBOL_CLASS (sym
) = LOC_CONST
;
7482 /* Return the type of the die in question using its DW_AT_type attribute. */
7484 static struct type
*
7485 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7488 struct attribute
*type_attr
;
7489 struct die_info
*type_die
;
7491 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7494 /* A missing DW_AT_type represents a void type. */
7495 return dwarf2_fundamental_type (cu
->objfile
, FT_VOID
, cu
);
7498 type_die
= follow_die_ref (die
, type_attr
, cu
);
7500 type
= tag_type_to_type (type_die
, cu
);
7503 dump_die (type_die
);
7504 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7510 /* Return the containing type of the die in question using its
7511 DW_AT_containing_type attribute. */
7513 static struct type
*
7514 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7516 struct type
*type
= NULL
;
7517 struct attribute
*type_attr
;
7518 struct die_info
*type_die
= NULL
;
7520 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7523 type_die
= follow_die_ref (die
, type_attr
, cu
);
7524 type
= tag_type_to_type (type_die
, cu
);
7529 dump_die (type_die
);
7530 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7536 static struct type
*
7537 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7545 read_type_die (die
, cu
);
7549 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7557 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7559 char *prefix
= determine_prefix (die
, cu
);
7560 const char *old_prefix
= processing_current_prefix
;
7561 struct cleanup
*back_to
= make_cleanup (xfree
, prefix
);
7562 processing_current_prefix
= prefix
;
7566 case DW_TAG_class_type
:
7567 case DW_TAG_structure_type
:
7568 case DW_TAG_union_type
:
7569 read_structure_type (die
, cu
);
7571 case DW_TAG_enumeration_type
:
7572 read_enumeration_type (die
, cu
);
7574 case DW_TAG_subprogram
:
7575 case DW_TAG_subroutine_type
:
7576 read_subroutine_type (die
, cu
);
7578 case DW_TAG_array_type
:
7579 read_array_type (die
, cu
);
7581 case DW_TAG_set_type
:
7582 read_set_type (die
, cu
);
7584 case DW_TAG_pointer_type
:
7585 read_tag_pointer_type (die
, cu
);
7587 case DW_TAG_ptr_to_member_type
:
7588 read_tag_ptr_to_member_type (die
, cu
);
7590 case DW_TAG_reference_type
:
7591 read_tag_reference_type (die
, cu
);
7593 case DW_TAG_const_type
:
7594 read_tag_const_type (die
, cu
);
7596 case DW_TAG_volatile_type
:
7597 read_tag_volatile_type (die
, cu
);
7599 case DW_TAG_string_type
:
7600 read_tag_string_type (die
, cu
);
7602 case DW_TAG_typedef
:
7603 read_typedef (die
, cu
);
7605 case DW_TAG_subrange_type
:
7606 read_subrange_type (die
, cu
);
7608 case DW_TAG_base_type
:
7609 read_base_type (die
, cu
);
7611 case DW_TAG_unspecified_type
:
7612 read_unspecified_type (die
, cu
);
7615 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7616 dwarf_tag_name (die
->tag
));
7620 processing_current_prefix
= old_prefix
;
7621 do_cleanups (back_to
);
7624 /* Return the name of the namespace/class that DIE is defined within,
7625 or "" if we can't tell. The caller should xfree the result. */
7627 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7628 therein) for an example of how to use this function to deal with
7629 DW_AT_specification. */
7632 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7634 struct die_info
*parent
;
7636 if (cu
->language
!= language_cplus
7637 && cu
->language
!= language_java
)
7640 parent
= die
->parent
;
7644 return xstrdup ("");
7648 switch (parent
->tag
) {
7649 case DW_TAG_namespace
:
7651 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7652 before doing this check? */
7653 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7655 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7660 char *parent_prefix
= determine_prefix (parent
, cu
);
7661 char *retval
= typename_concat (NULL
, parent_prefix
,
7662 namespace_name (parent
, &dummy
,
7665 xfree (parent_prefix
);
7670 case DW_TAG_class_type
:
7671 case DW_TAG_structure_type
:
7673 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7675 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7679 const char *old_prefix
= processing_current_prefix
;
7680 char *new_prefix
= determine_prefix (parent
, cu
);
7683 processing_current_prefix
= new_prefix
;
7684 retval
= determine_class_name (parent
, cu
);
7685 processing_current_prefix
= old_prefix
;
7692 return determine_prefix (parent
, cu
);
7697 /* Return a newly-allocated string formed by concatenating PREFIX and
7698 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7699 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7700 perform an obconcat, otherwise allocate storage for the result. The CU argument
7701 is used to determine the language and hence, the appropriate separator. */
7703 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7706 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
7707 struct dwarf2_cu
*cu
)
7711 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
7713 else if (cu
->language
== language_java
)
7720 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
7725 strcpy (retval
, prefix
);
7726 strcat (retval
, sep
);
7729 strcat (retval
, suffix
);
7735 /* We have an obstack. */
7736 return obconcat (obs
, prefix
, sep
, suffix
);
7740 static struct type
*
7741 dwarf_base_type (int encoding
, int size
, struct dwarf2_cu
*cu
)
7743 struct objfile
*objfile
= cu
->objfile
;
7745 /* FIXME - this should not produce a new (struct type *)
7746 every time. It should cache base types. */
7750 case DW_ATE_address
:
7751 type
= dwarf2_fundamental_type (objfile
, FT_VOID
, cu
);
7753 case DW_ATE_boolean
:
7754 type
= dwarf2_fundamental_type (objfile
, FT_BOOLEAN
, cu
);
7756 case DW_ATE_complex_float
:
7759 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_COMPLEX
, cu
);
7763 type
= dwarf2_fundamental_type (objfile
, FT_COMPLEX
, cu
);
7769 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
, cu
);
7773 type
= dwarf2_fundamental_type (objfile
, FT_FLOAT
, cu
);
7776 case DW_ATE_decimal_float
:
7778 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_DECFLOAT
, cu
);
7780 type
= dwarf2_fundamental_type (objfile
, FT_EXT_PREC_DECFLOAT
, cu
);
7782 type
= dwarf2_fundamental_type (objfile
, FT_DECFLOAT
, cu
);
7788 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
, cu
);
7791 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_SHORT
, cu
);
7795 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
, cu
);
7799 case DW_ATE_signed_char
:
7800 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
, cu
);
7802 case DW_ATE_unsigned
:
7806 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
, cu
);
7809 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_SHORT
, cu
);
7813 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_INTEGER
, cu
);
7817 case DW_ATE_unsigned_char
:
7818 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
, cu
);
7821 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
, cu
);
7828 copy_die (struct die_info
*old_die
)
7830 struct die_info
*new_die
;
7833 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
7834 memset (new_die
, 0, sizeof (struct die_info
));
7836 new_die
->tag
= old_die
->tag
;
7837 new_die
->has_children
= old_die
->has_children
;
7838 new_die
->abbrev
= old_die
->abbrev
;
7839 new_die
->offset
= old_die
->offset
;
7840 new_die
->type
= NULL
;
7842 num_attrs
= old_die
->num_attrs
;
7843 new_die
->num_attrs
= num_attrs
;
7844 new_die
->attrs
= (struct attribute
*)
7845 xmalloc (num_attrs
* sizeof (struct attribute
));
7847 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
7849 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
7850 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
7851 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
7854 new_die
->next
= NULL
;
7859 /* Return sibling of die, NULL if no sibling. */
7861 static struct die_info
*
7862 sibling_die (struct die_info
*die
)
7864 return die
->sibling
;
7867 /* Get linkage name of a die, return NULL if not found. */
7870 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7872 struct attribute
*attr
;
7874 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7875 if (attr
&& DW_STRING (attr
))
7876 return DW_STRING (attr
);
7877 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7878 if (attr
&& DW_STRING (attr
))
7879 return DW_STRING (attr
);
7883 /* Get name of a die, return NULL if not found. */
7886 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7888 struct attribute
*attr
;
7890 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7891 if (attr
&& DW_STRING (attr
))
7892 return DW_STRING (attr
);
7896 /* Return the die that this die in an extension of, or NULL if there
7899 static struct die_info
*
7900 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
7902 struct attribute
*attr
;
7904 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
7908 return follow_die_ref (die
, attr
, cu
);
7911 /* Convert a DIE tag into its string name. */
7914 dwarf_tag_name (unsigned tag
)
7918 case DW_TAG_padding
:
7919 return "DW_TAG_padding";
7920 case DW_TAG_array_type
:
7921 return "DW_TAG_array_type";
7922 case DW_TAG_class_type
:
7923 return "DW_TAG_class_type";
7924 case DW_TAG_entry_point
:
7925 return "DW_TAG_entry_point";
7926 case DW_TAG_enumeration_type
:
7927 return "DW_TAG_enumeration_type";
7928 case DW_TAG_formal_parameter
:
7929 return "DW_TAG_formal_parameter";
7930 case DW_TAG_imported_declaration
:
7931 return "DW_TAG_imported_declaration";
7933 return "DW_TAG_label";
7934 case DW_TAG_lexical_block
:
7935 return "DW_TAG_lexical_block";
7937 return "DW_TAG_member";
7938 case DW_TAG_pointer_type
:
7939 return "DW_TAG_pointer_type";
7940 case DW_TAG_reference_type
:
7941 return "DW_TAG_reference_type";
7942 case DW_TAG_compile_unit
:
7943 return "DW_TAG_compile_unit";
7944 case DW_TAG_string_type
:
7945 return "DW_TAG_string_type";
7946 case DW_TAG_structure_type
:
7947 return "DW_TAG_structure_type";
7948 case DW_TAG_subroutine_type
:
7949 return "DW_TAG_subroutine_type";
7950 case DW_TAG_typedef
:
7951 return "DW_TAG_typedef";
7952 case DW_TAG_union_type
:
7953 return "DW_TAG_union_type";
7954 case DW_TAG_unspecified_parameters
:
7955 return "DW_TAG_unspecified_parameters";
7956 case DW_TAG_variant
:
7957 return "DW_TAG_variant";
7958 case DW_TAG_common_block
:
7959 return "DW_TAG_common_block";
7960 case DW_TAG_common_inclusion
:
7961 return "DW_TAG_common_inclusion";
7962 case DW_TAG_inheritance
:
7963 return "DW_TAG_inheritance";
7964 case DW_TAG_inlined_subroutine
:
7965 return "DW_TAG_inlined_subroutine";
7967 return "DW_TAG_module";
7968 case DW_TAG_ptr_to_member_type
:
7969 return "DW_TAG_ptr_to_member_type";
7970 case DW_TAG_set_type
:
7971 return "DW_TAG_set_type";
7972 case DW_TAG_subrange_type
:
7973 return "DW_TAG_subrange_type";
7974 case DW_TAG_with_stmt
:
7975 return "DW_TAG_with_stmt";
7976 case DW_TAG_access_declaration
:
7977 return "DW_TAG_access_declaration";
7978 case DW_TAG_base_type
:
7979 return "DW_TAG_base_type";
7980 case DW_TAG_catch_block
:
7981 return "DW_TAG_catch_block";
7982 case DW_TAG_const_type
:
7983 return "DW_TAG_const_type";
7984 case DW_TAG_constant
:
7985 return "DW_TAG_constant";
7986 case DW_TAG_enumerator
:
7987 return "DW_TAG_enumerator";
7988 case DW_TAG_file_type
:
7989 return "DW_TAG_file_type";
7991 return "DW_TAG_friend";
7992 case DW_TAG_namelist
:
7993 return "DW_TAG_namelist";
7994 case DW_TAG_namelist_item
:
7995 return "DW_TAG_namelist_item";
7996 case DW_TAG_packed_type
:
7997 return "DW_TAG_packed_type";
7998 case DW_TAG_subprogram
:
7999 return "DW_TAG_subprogram";
8000 case DW_TAG_template_type_param
:
8001 return "DW_TAG_template_type_param";
8002 case DW_TAG_template_value_param
:
8003 return "DW_TAG_template_value_param";
8004 case DW_TAG_thrown_type
:
8005 return "DW_TAG_thrown_type";
8006 case DW_TAG_try_block
:
8007 return "DW_TAG_try_block";
8008 case DW_TAG_variant_part
:
8009 return "DW_TAG_variant_part";
8010 case DW_TAG_variable
:
8011 return "DW_TAG_variable";
8012 case DW_TAG_volatile_type
:
8013 return "DW_TAG_volatile_type";
8014 case DW_TAG_dwarf_procedure
:
8015 return "DW_TAG_dwarf_procedure";
8016 case DW_TAG_restrict_type
:
8017 return "DW_TAG_restrict_type";
8018 case DW_TAG_interface_type
:
8019 return "DW_TAG_interface_type";
8020 case DW_TAG_namespace
:
8021 return "DW_TAG_namespace";
8022 case DW_TAG_imported_module
:
8023 return "DW_TAG_imported_module";
8024 case DW_TAG_unspecified_type
:
8025 return "DW_TAG_unspecified_type";
8026 case DW_TAG_partial_unit
:
8027 return "DW_TAG_partial_unit";
8028 case DW_TAG_imported_unit
:
8029 return "DW_TAG_imported_unit";
8030 case DW_TAG_condition
:
8031 return "DW_TAG_condition";
8032 case DW_TAG_shared_type
:
8033 return "DW_TAG_shared_type";
8034 case DW_TAG_MIPS_loop
:
8035 return "DW_TAG_MIPS_loop";
8036 case DW_TAG_HP_array_descriptor
:
8037 return "DW_TAG_HP_array_descriptor";
8038 case DW_TAG_format_label
:
8039 return "DW_TAG_format_label";
8040 case DW_TAG_function_template
:
8041 return "DW_TAG_function_template";
8042 case DW_TAG_class_template
:
8043 return "DW_TAG_class_template";
8044 case DW_TAG_GNU_BINCL
:
8045 return "DW_TAG_GNU_BINCL";
8046 case DW_TAG_GNU_EINCL
:
8047 return "DW_TAG_GNU_EINCL";
8048 case DW_TAG_upc_shared_type
:
8049 return "DW_TAG_upc_shared_type";
8050 case DW_TAG_upc_strict_type
:
8051 return "DW_TAG_upc_strict_type";
8052 case DW_TAG_upc_relaxed_type
:
8053 return "DW_TAG_upc_relaxed_type";
8054 case DW_TAG_PGI_kanji_type
:
8055 return "DW_TAG_PGI_kanji_type";
8056 case DW_TAG_PGI_interface_block
:
8057 return "DW_TAG_PGI_interface_block";
8059 return "DW_TAG_<unknown>";
8063 /* Convert a DWARF attribute code into its string name. */
8066 dwarf_attr_name (unsigned attr
)
8071 return "DW_AT_sibling";
8072 case DW_AT_location
:
8073 return "DW_AT_location";
8075 return "DW_AT_name";
8076 case DW_AT_ordering
:
8077 return "DW_AT_ordering";
8078 case DW_AT_subscr_data
:
8079 return "DW_AT_subscr_data";
8080 case DW_AT_byte_size
:
8081 return "DW_AT_byte_size";
8082 case DW_AT_bit_offset
:
8083 return "DW_AT_bit_offset";
8084 case DW_AT_bit_size
:
8085 return "DW_AT_bit_size";
8086 case DW_AT_element_list
:
8087 return "DW_AT_element_list";
8088 case DW_AT_stmt_list
:
8089 return "DW_AT_stmt_list";
8091 return "DW_AT_low_pc";
8093 return "DW_AT_high_pc";
8094 case DW_AT_language
:
8095 return "DW_AT_language";
8097 return "DW_AT_member";
8099 return "DW_AT_discr";
8100 case DW_AT_discr_value
:
8101 return "DW_AT_discr_value";
8102 case DW_AT_visibility
:
8103 return "DW_AT_visibility";
8105 return "DW_AT_import";
8106 case DW_AT_string_length
:
8107 return "DW_AT_string_length";
8108 case DW_AT_common_reference
:
8109 return "DW_AT_common_reference";
8110 case DW_AT_comp_dir
:
8111 return "DW_AT_comp_dir";
8112 case DW_AT_const_value
:
8113 return "DW_AT_const_value";
8114 case DW_AT_containing_type
:
8115 return "DW_AT_containing_type";
8116 case DW_AT_default_value
:
8117 return "DW_AT_default_value";
8119 return "DW_AT_inline";
8120 case DW_AT_is_optional
:
8121 return "DW_AT_is_optional";
8122 case DW_AT_lower_bound
:
8123 return "DW_AT_lower_bound";
8124 case DW_AT_producer
:
8125 return "DW_AT_producer";
8126 case DW_AT_prototyped
:
8127 return "DW_AT_prototyped";
8128 case DW_AT_return_addr
:
8129 return "DW_AT_return_addr";
8130 case DW_AT_start_scope
:
8131 return "DW_AT_start_scope";
8132 case DW_AT_stride_size
:
8133 return "DW_AT_stride_size";
8134 case DW_AT_upper_bound
:
8135 return "DW_AT_upper_bound";
8136 case DW_AT_abstract_origin
:
8137 return "DW_AT_abstract_origin";
8138 case DW_AT_accessibility
:
8139 return "DW_AT_accessibility";
8140 case DW_AT_address_class
:
8141 return "DW_AT_address_class";
8142 case DW_AT_artificial
:
8143 return "DW_AT_artificial";
8144 case DW_AT_base_types
:
8145 return "DW_AT_base_types";
8146 case DW_AT_calling_convention
:
8147 return "DW_AT_calling_convention";
8149 return "DW_AT_count";
8150 case DW_AT_data_member_location
:
8151 return "DW_AT_data_member_location";
8152 case DW_AT_decl_column
:
8153 return "DW_AT_decl_column";
8154 case DW_AT_decl_file
:
8155 return "DW_AT_decl_file";
8156 case DW_AT_decl_line
:
8157 return "DW_AT_decl_line";
8158 case DW_AT_declaration
:
8159 return "DW_AT_declaration";
8160 case DW_AT_discr_list
:
8161 return "DW_AT_discr_list";
8162 case DW_AT_encoding
:
8163 return "DW_AT_encoding";
8164 case DW_AT_external
:
8165 return "DW_AT_external";
8166 case DW_AT_frame_base
:
8167 return "DW_AT_frame_base";
8169 return "DW_AT_friend";
8170 case DW_AT_identifier_case
:
8171 return "DW_AT_identifier_case";
8172 case DW_AT_macro_info
:
8173 return "DW_AT_macro_info";
8174 case DW_AT_namelist_items
:
8175 return "DW_AT_namelist_items";
8176 case DW_AT_priority
:
8177 return "DW_AT_priority";
8179 return "DW_AT_segment";
8180 case DW_AT_specification
:
8181 return "DW_AT_specification";
8182 case DW_AT_static_link
:
8183 return "DW_AT_static_link";
8185 return "DW_AT_type";
8186 case DW_AT_use_location
:
8187 return "DW_AT_use_location";
8188 case DW_AT_variable_parameter
:
8189 return "DW_AT_variable_parameter";
8190 case DW_AT_virtuality
:
8191 return "DW_AT_virtuality";
8192 case DW_AT_vtable_elem_location
:
8193 return "DW_AT_vtable_elem_location";
8194 /* DWARF 3 values. */
8195 case DW_AT_allocated
:
8196 return "DW_AT_allocated";
8197 case DW_AT_associated
:
8198 return "DW_AT_associated";
8199 case DW_AT_data_location
:
8200 return "DW_AT_data_location";
8202 return "DW_AT_stride";
8203 case DW_AT_entry_pc
:
8204 return "DW_AT_entry_pc";
8205 case DW_AT_use_UTF8
:
8206 return "DW_AT_use_UTF8";
8207 case DW_AT_extension
:
8208 return "DW_AT_extension";
8210 return "DW_AT_ranges";
8211 case DW_AT_trampoline
:
8212 return "DW_AT_trampoline";
8213 case DW_AT_call_column
:
8214 return "DW_AT_call_column";
8215 case DW_AT_call_file
:
8216 return "DW_AT_call_file";
8217 case DW_AT_call_line
:
8218 return "DW_AT_call_line";
8219 case DW_AT_description
:
8220 return "DW_AT_description";
8221 case DW_AT_binary_scale
:
8222 return "DW_AT_binary_scale";
8223 case DW_AT_decimal_scale
:
8224 return "DW_AT_decimal_scale";
8226 return "DW_AT_small";
8227 case DW_AT_decimal_sign
:
8228 return "DW_AT_decimal_sign";
8229 case DW_AT_digit_count
:
8230 return "DW_AT_digit_count";
8231 case DW_AT_picture_string
:
8232 return "DW_AT_picture_string";
8234 return "DW_AT_mutable";
8235 case DW_AT_threads_scaled
:
8236 return "DW_AT_threads_scaled";
8237 case DW_AT_explicit
:
8238 return "DW_AT_explicit";
8239 case DW_AT_object_pointer
:
8240 return "DW_AT_object_pointer";
8241 case DW_AT_endianity
:
8242 return "DW_AT_endianity";
8243 case DW_AT_elemental
:
8244 return "DW_AT_elemental";
8246 return "DW_AT_pure";
8247 case DW_AT_recursive
:
8248 return "DW_AT_recursive";
8250 /* SGI/MIPS extensions. */
8251 case DW_AT_MIPS_fde
:
8252 return "DW_AT_MIPS_fde";
8253 case DW_AT_MIPS_loop_begin
:
8254 return "DW_AT_MIPS_loop_begin";
8255 case DW_AT_MIPS_tail_loop_begin
:
8256 return "DW_AT_MIPS_tail_loop_begin";
8257 case DW_AT_MIPS_epilog_begin
:
8258 return "DW_AT_MIPS_epilog_begin";
8259 case DW_AT_MIPS_loop_unroll_factor
:
8260 return "DW_AT_MIPS_loop_unroll_factor";
8261 case DW_AT_MIPS_software_pipeline_depth
:
8262 return "DW_AT_MIPS_software_pipeline_depth";
8263 case DW_AT_MIPS_linkage_name
:
8264 return "DW_AT_MIPS_linkage_name";
8265 case DW_AT_MIPS_stride
:
8266 return "DW_AT_MIPS_stride";
8267 case DW_AT_MIPS_abstract_name
:
8268 return "DW_AT_MIPS_abstract_name";
8269 case DW_AT_MIPS_clone_origin
:
8270 return "DW_AT_MIPS_clone_origin";
8271 case DW_AT_MIPS_has_inlines
:
8272 return "DW_AT_MIPS_has_inlines";
8274 /* HP extensions. */
8275 case DW_AT_HP_block_index
:
8276 return "DW_AT_HP_block_index";
8277 case DW_AT_HP_unmodifiable
:
8278 return "DW_AT_HP_unmodifiable";
8279 case DW_AT_HP_actuals_stmt_list
:
8280 return "DW_AT_HP_actuals_stmt_list";
8281 case DW_AT_HP_proc_per_section
:
8282 return "DW_AT_HP_proc_per_section";
8283 case DW_AT_HP_raw_data_ptr
:
8284 return "DW_AT_HP_raw_data_ptr";
8285 case DW_AT_HP_pass_by_reference
:
8286 return "DW_AT_HP_pass_by_reference";
8287 case DW_AT_HP_opt_level
:
8288 return "DW_AT_HP_opt_level";
8289 case DW_AT_HP_prof_version_id
:
8290 return "DW_AT_HP_prof_version_id";
8291 case DW_AT_HP_opt_flags
:
8292 return "DW_AT_HP_opt_flags";
8293 case DW_AT_HP_cold_region_low_pc
:
8294 return "DW_AT_HP_cold_region_low_pc";
8295 case DW_AT_HP_cold_region_high_pc
:
8296 return "DW_AT_HP_cold_region_high_pc";
8297 case DW_AT_HP_all_variables_modifiable
:
8298 return "DW_AT_HP_all_variables_modifiable";
8299 case DW_AT_HP_linkage_name
:
8300 return "DW_AT_HP_linkage_name";
8301 case DW_AT_HP_prof_flags
:
8302 return "DW_AT_HP_prof_flags";
8303 /* GNU extensions. */
8304 case DW_AT_sf_names
:
8305 return "DW_AT_sf_names";
8306 case DW_AT_src_info
:
8307 return "DW_AT_src_info";
8308 case DW_AT_mac_info
:
8309 return "DW_AT_mac_info";
8310 case DW_AT_src_coords
:
8311 return "DW_AT_src_coords";
8312 case DW_AT_body_begin
:
8313 return "DW_AT_body_begin";
8314 case DW_AT_body_end
:
8315 return "DW_AT_body_end";
8316 case DW_AT_GNU_vector
:
8317 return "DW_AT_GNU_vector";
8318 /* VMS extensions. */
8319 case DW_AT_VMS_rtnbeg_pd_address
:
8320 return "DW_AT_VMS_rtnbeg_pd_address";
8321 /* UPC extension. */
8322 case DW_AT_upc_threads_scaled
:
8323 return "DW_AT_upc_threads_scaled";
8324 /* PGI (STMicroelectronics) extensions. */
8325 case DW_AT_PGI_lbase
:
8326 return "DW_AT_PGI_lbase";
8327 case DW_AT_PGI_soffset
:
8328 return "DW_AT_PGI_soffset";
8329 case DW_AT_PGI_lstride
:
8330 return "DW_AT_PGI_lstride";
8332 return "DW_AT_<unknown>";
8336 /* Convert a DWARF value form code into its string name. */
8339 dwarf_form_name (unsigned form
)
8344 return "DW_FORM_addr";
8345 case DW_FORM_block2
:
8346 return "DW_FORM_block2";
8347 case DW_FORM_block4
:
8348 return "DW_FORM_block4";
8350 return "DW_FORM_data2";
8352 return "DW_FORM_data4";
8354 return "DW_FORM_data8";
8355 case DW_FORM_string
:
8356 return "DW_FORM_string";
8358 return "DW_FORM_block";
8359 case DW_FORM_block1
:
8360 return "DW_FORM_block1";
8362 return "DW_FORM_data1";
8364 return "DW_FORM_flag";
8366 return "DW_FORM_sdata";
8368 return "DW_FORM_strp";
8370 return "DW_FORM_udata";
8371 case DW_FORM_ref_addr
:
8372 return "DW_FORM_ref_addr";
8374 return "DW_FORM_ref1";
8376 return "DW_FORM_ref2";
8378 return "DW_FORM_ref4";
8380 return "DW_FORM_ref8";
8381 case DW_FORM_ref_udata
:
8382 return "DW_FORM_ref_udata";
8383 case DW_FORM_indirect
:
8384 return "DW_FORM_indirect";
8386 return "DW_FORM_<unknown>";
8390 /* Convert a DWARF stack opcode into its string name. */
8393 dwarf_stack_op_name (unsigned op
)
8398 return "DW_OP_addr";
8400 return "DW_OP_deref";
8402 return "DW_OP_const1u";
8404 return "DW_OP_const1s";
8406 return "DW_OP_const2u";
8408 return "DW_OP_const2s";
8410 return "DW_OP_const4u";
8412 return "DW_OP_const4s";
8414 return "DW_OP_const8u";
8416 return "DW_OP_const8s";
8418 return "DW_OP_constu";
8420 return "DW_OP_consts";
8424 return "DW_OP_drop";
8426 return "DW_OP_over";
8428 return "DW_OP_pick";
8430 return "DW_OP_swap";
8434 return "DW_OP_xderef";
8442 return "DW_OP_minus";
8454 return "DW_OP_plus";
8455 case DW_OP_plus_uconst
:
8456 return "DW_OP_plus_uconst";
8462 return "DW_OP_shra";
8480 return "DW_OP_skip";
8482 return "DW_OP_lit0";
8484 return "DW_OP_lit1";
8486 return "DW_OP_lit2";
8488 return "DW_OP_lit3";
8490 return "DW_OP_lit4";
8492 return "DW_OP_lit5";
8494 return "DW_OP_lit6";
8496 return "DW_OP_lit7";
8498 return "DW_OP_lit8";
8500 return "DW_OP_lit9";
8502 return "DW_OP_lit10";
8504 return "DW_OP_lit11";
8506 return "DW_OP_lit12";
8508 return "DW_OP_lit13";
8510 return "DW_OP_lit14";
8512 return "DW_OP_lit15";
8514 return "DW_OP_lit16";
8516 return "DW_OP_lit17";
8518 return "DW_OP_lit18";
8520 return "DW_OP_lit19";
8522 return "DW_OP_lit20";
8524 return "DW_OP_lit21";
8526 return "DW_OP_lit22";
8528 return "DW_OP_lit23";
8530 return "DW_OP_lit24";
8532 return "DW_OP_lit25";
8534 return "DW_OP_lit26";
8536 return "DW_OP_lit27";
8538 return "DW_OP_lit28";
8540 return "DW_OP_lit29";
8542 return "DW_OP_lit30";
8544 return "DW_OP_lit31";
8546 return "DW_OP_reg0";
8548 return "DW_OP_reg1";
8550 return "DW_OP_reg2";
8552 return "DW_OP_reg3";
8554 return "DW_OP_reg4";
8556 return "DW_OP_reg5";
8558 return "DW_OP_reg6";
8560 return "DW_OP_reg7";
8562 return "DW_OP_reg8";
8564 return "DW_OP_reg9";
8566 return "DW_OP_reg10";
8568 return "DW_OP_reg11";
8570 return "DW_OP_reg12";
8572 return "DW_OP_reg13";
8574 return "DW_OP_reg14";
8576 return "DW_OP_reg15";
8578 return "DW_OP_reg16";
8580 return "DW_OP_reg17";
8582 return "DW_OP_reg18";
8584 return "DW_OP_reg19";
8586 return "DW_OP_reg20";
8588 return "DW_OP_reg21";
8590 return "DW_OP_reg22";
8592 return "DW_OP_reg23";
8594 return "DW_OP_reg24";
8596 return "DW_OP_reg25";
8598 return "DW_OP_reg26";
8600 return "DW_OP_reg27";
8602 return "DW_OP_reg28";
8604 return "DW_OP_reg29";
8606 return "DW_OP_reg30";
8608 return "DW_OP_reg31";
8610 return "DW_OP_breg0";
8612 return "DW_OP_breg1";
8614 return "DW_OP_breg2";
8616 return "DW_OP_breg3";
8618 return "DW_OP_breg4";
8620 return "DW_OP_breg5";
8622 return "DW_OP_breg6";
8624 return "DW_OP_breg7";
8626 return "DW_OP_breg8";
8628 return "DW_OP_breg9";
8630 return "DW_OP_breg10";
8632 return "DW_OP_breg11";
8634 return "DW_OP_breg12";
8636 return "DW_OP_breg13";
8638 return "DW_OP_breg14";
8640 return "DW_OP_breg15";
8642 return "DW_OP_breg16";
8644 return "DW_OP_breg17";
8646 return "DW_OP_breg18";
8648 return "DW_OP_breg19";
8650 return "DW_OP_breg20";
8652 return "DW_OP_breg21";
8654 return "DW_OP_breg22";
8656 return "DW_OP_breg23";
8658 return "DW_OP_breg24";
8660 return "DW_OP_breg25";
8662 return "DW_OP_breg26";
8664 return "DW_OP_breg27";
8666 return "DW_OP_breg28";
8668 return "DW_OP_breg29";
8670 return "DW_OP_breg30";
8672 return "DW_OP_breg31";
8674 return "DW_OP_regx";
8676 return "DW_OP_fbreg";
8678 return "DW_OP_bregx";
8680 return "DW_OP_piece";
8681 case DW_OP_deref_size
:
8682 return "DW_OP_deref_size";
8683 case DW_OP_xderef_size
:
8684 return "DW_OP_xderef_size";
8687 /* DWARF 3 extensions. */
8688 case DW_OP_push_object_address
:
8689 return "DW_OP_push_object_address";
8691 return "DW_OP_call2";
8693 return "DW_OP_call4";
8694 case DW_OP_call_ref
:
8695 return "DW_OP_call_ref";
8696 /* GNU extensions. */
8697 case DW_OP_form_tls_address
:
8698 return "DW_OP_form_tls_address";
8699 case DW_OP_call_frame_cfa
:
8700 return "DW_OP_call_frame_cfa";
8701 case DW_OP_bit_piece
:
8702 return "DW_OP_bit_piece";
8703 case DW_OP_GNU_push_tls_address
:
8704 return "DW_OP_GNU_push_tls_address";
8705 case DW_OP_GNU_uninit
:
8706 return "DW_OP_GNU_uninit";
8707 /* HP extensions. */
8708 case DW_OP_HP_is_value
:
8709 return "DW_OP_HP_is_value";
8710 case DW_OP_HP_fltconst4
:
8711 return "DW_OP_HP_fltconst4";
8712 case DW_OP_HP_fltconst8
:
8713 return "DW_OP_HP_fltconst8";
8714 case DW_OP_HP_mod_range
:
8715 return "DW_OP_HP_mod_range";
8716 case DW_OP_HP_unmod_range
:
8717 return "DW_OP_HP_unmod_range";
8719 return "DW_OP_HP_tls";
8721 return "OP_<unknown>";
8726 dwarf_bool_name (unsigned mybool
)
8734 /* Convert a DWARF type code into its string name. */
8737 dwarf_type_encoding_name (unsigned enc
)
8742 return "DW_ATE_void";
8743 case DW_ATE_address
:
8744 return "DW_ATE_address";
8745 case DW_ATE_boolean
:
8746 return "DW_ATE_boolean";
8747 case DW_ATE_complex_float
:
8748 return "DW_ATE_complex_float";
8750 return "DW_ATE_float";
8752 return "DW_ATE_signed";
8753 case DW_ATE_signed_char
:
8754 return "DW_ATE_signed_char";
8755 case DW_ATE_unsigned
:
8756 return "DW_ATE_unsigned";
8757 case DW_ATE_unsigned_char
:
8758 return "DW_ATE_unsigned_char";
8760 case DW_ATE_imaginary_float
:
8761 return "DW_ATE_imaginary_float";
8762 case DW_ATE_packed_decimal
:
8763 return "DW_ATE_packed_decimal";
8764 case DW_ATE_numeric_string
:
8765 return "DW_ATE_numeric_string";
8767 return "DW_ATE_edited";
8768 case DW_ATE_signed_fixed
:
8769 return "DW_ATE_signed_fixed";
8770 case DW_ATE_unsigned_fixed
:
8771 return "DW_ATE_unsigned_fixed";
8772 case DW_ATE_decimal_float
:
8773 return "DW_ATE_decimal_float";
8774 /* HP extensions. */
8775 case DW_ATE_HP_float80
:
8776 return "DW_ATE_HP_float80";
8777 case DW_ATE_HP_complex_float80
:
8778 return "DW_ATE_HP_complex_float80";
8779 case DW_ATE_HP_float128
:
8780 return "DW_ATE_HP_float128";
8781 case DW_ATE_HP_complex_float128
:
8782 return "DW_ATE_HP_complex_float128";
8783 case DW_ATE_HP_floathpintel
:
8784 return "DW_ATE_HP_floathpintel";
8785 case DW_ATE_HP_imaginary_float80
:
8786 return "DW_ATE_HP_imaginary_float80";
8787 case DW_ATE_HP_imaginary_float128
:
8788 return "DW_ATE_HP_imaginary_float128";
8790 return "DW_ATE_<unknown>";
8794 /* Convert a DWARF call frame info operation to its string name. */
8798 dwarf_cfi_name (unsigned cfi_opc
)
8802 case DW_CFA_advance_loc
:
8803 return "DW_CFA_advance_loc";
8805 return "DW_CFA_offset";
8806 case DW_CFA_restore
:
8807 return "DW_CFA_restore";
8809 return "DW_CFA_nop";
8810 case DW_CFA_set_loc
:
8811 return "DW_CFA_set_loc";
8812 case DW_CFA_advance_loc1
:
8813 return "DW_CFA_advance_loc1";
8814 case DW_CFA_advance_loc2
:
8815 return "DW_CFA_advance_loc2";
8816 case DW_CFA_advance_loc4
:
8817 return "DW_CFA_advance_loc4";
8818 case DW_CFA_offset_extended
:
8819 return "DW_CFA_offset_extended";
8820 case DW_CFA_restore_extended
:
8821 return "DW_CFA_restore_extended";
8822 case DW_CFA_undefined
:
8823 return "DW_CFA_undefined";
8824 case DW_CFA_same_value
:
8825 return "DW_CFA_same_value";
8826 case DW_CFA_register
:
8827 return "DW_CFA_register";
8828 case DW_CFA_remember_state
:
8829 return "DW_CFA_remember_state";
8830 case DW_CFA_restore_state
:
8831 return "DW_CFA_restore_state";
8832 case DW_CFA_def_cfa
:
8833 return "DW_CFA_def_cfa";
8834 case DW_CFA_def_cfa_register
:
8835 return "DW_CFA_def_cfa_register";
8836 case DW_CFA_def_cfa_offset
:
8837 return "DW_CFA_def_cfa_offset";
8839 case DW_CFA_def_cfa_expression
:
8840 return "DW_CFA_def_cfa_expression";
8841 case DW_CFA_expression
:
8842 return "DW_CFA_expression";
8843 case DW_CFA_offset_extended_sf
:
8844 return "DW_CFA_offset_extended_sf";
8845 case DW_CFA_def_cfa_sf
:
8846 return "DW_CFA_def_cfa_sf";
8847 case DW_CFA_def_cfa_offset_sf
:
8848 return "DW_CFA_def_cfa_offset_sf";
8849 case DW_CFA_val_offset
:
8850 return "DW_CFA_val_offset";
8851 case DW_CFA_val_offset_sf
:
8852 return "DW_CFA_val_offset_sf";
8853 case DW_CFA_val_expression
:
8854 return "DW_CFA_val_expression";
8855 /* SGI/MIPS specific. */
8856 case DW_CFA_MIPS_advance_loc8
:
8857 return "DW_CFA_MIPS_advance_loc8";
8858 /* GNU extensions. */
8859 case DW_CFA_GNU_window_save
:
8860 return "DW_CFA_GNU_window_save";
8861 case DW_CFA_GNU_args_size
:
8862 return "DW_CFA_GNU_args_size";
8863 case DW_CFA_GNU_negative_offset_extended
:
8864 return "DW_CFA_GNU_negative_offset_extended";
8866 return "DW_CFA_<unknown>";
8872 dump_die (struct die_info
*die
)
8876 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
8877 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
8878 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
8879 dwarf_bool_name (die
->child
!= NULL
));
8881 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
8882 for (i
= 0; i
< die
->num_attrs
; ++i
)
8884 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
8885 dwarf_attr_name (die
->attrs
[i
].name
),
8886 dwarf_form_name (die
->attrs
[i
].form
));
8887 switch (die
->attrs
[i
].form
)
8889 case DW_FORM_ref_addr
:
8891 fprintf_unfiltered (gdb_stderr
, "address: ");
8892 deprecated_print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
8894 case DW_FORM_block2
:
8895 case DW_FORM_block4
:
8897 case DW_FORM_block1
:
8898 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
8903 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
8904 (long) (DW_ADDR (&die
->attrs
[i
])));
8912 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
8914 case DW_FORM_string
:
8916 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
8917 DW_STRING (&die
->attrs
[i
])
8918 ? DW_STRING (&die
->attrs
[i
]) : "");
8921 if (DW_UNSND (&die
->attrs
[i
]))
8922 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
8924 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
8926 case DW_FORM_indirect
:
8927 /* the reader will have reduced the indirect form to
8928 the "base form" so this form should not occur */
8929 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
8932 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
8933 die
->attrs
[i
].form
);
8935 fprintf_unfiltered (gdb_stderr
, "\n");
8940 dump_die_list (struct die_info
*die
)
8945 if (die
->child
!= NULL
)
8946 dump_die_list (die
->child
);
8947 if (die
->sibling
!= NULL
)
8948 dump_die_list (die
->sibling
);
8953 store_in_ref_table (unsigned int offset
, struct die_info
*die
,
8954 struct dwarf2_cu
*cu
)
8957 struct die_info
*old
;
8959 h
= (offset
% REF_HASH_SIZE
);
8960 old
= cu
->die_ref_table
[h
];
8961 die
->next_ref
= old
;
8962 cu
->die_ref_table
[h
] = die
;
8966 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
8968 unsigned int result
= 0;
8972 case DW_FORM_ref_addr
:
8977 case DW_FORM_ref_udata
:
8978 result
= DW_ADDR (attr
);
8981 complaint (&symfile_complaints
,
8982 _("unsupported die ref attribute form: '%s'"),
8983 dwarf_form_name (attr
->form
));
8988 /* Return the constant value held by the given attribute. Return -1
8989 if the value held by the attribute is not constant. */
8992 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
8994 if (attr
->form
== DW_FORM_sdata
)
8995 return DW_SND (attr
);
8996 else if (attr
->form
== DW_FORM_udata
8997 || attr
->form
== DW_FORM_data1
8998 || attr
->form
== DW_FORM_data2
8999 || attr
->form
== DW_FORM_data4
9000 || attr
->form
== DW_FORM_data8
)
9001 return DW_UNSND (attr
);
9004 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
9005 dwarf_form_name (attr
->form
));
9006 return default_value
;
9010 static struct die_info
*
9011 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
9012 struct dwarf2_cu
*cu
)
9014 struct die_info
*die
;
9015 unsigned int offset
;
9017 struct die_info temp_die
;
9018 struct dwarf2_cu
*target_cu
;
9020 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
9022 if (DW_ADDR (attr
) < cu
->header
.offset
9023 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
9025 struct dwarf2_per_cu_data
*per_cu
;
9026 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
9028 target_cu
= per_cu
->cu
;
9033 h
= (offset
% REF_HASH_SIZE
);
9034 die
= target_cu
->die_ref_table
[h
];
9037 if (die
->offset
== offset
)
9039 die
= die
->next_ref
;
9042 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9043 "at 0x%lx [in module %s]"),
9044 (long) src_die
->offset
, (long) offset
, cu
->objfile
->name
);
9049 static struct type
*
9050 dwarf2_fundamental_type (struct objfile
*objfile
, int typeid,
9051 struct dwarf2_cu
*cu
)
9053 if (typeid < 0 || typeid >= FT_NUM_MEMBERS
)
9055 error (_("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]"),
9056 typeid, objfile
->name
);
9059 /* Look for this particular type in the fundamental type vector. If
9060 one is not found, create and install one appropriate for the
9061 current language and the current target machine. */
9063 if (cu
->ftypes
[typeid] == NULL
)
9065 cu
->ftypes
[typeid] = cu
->language_defn
->la_fund_type (objfile
, typeid);
9068 return (cu
->ftypes
[typeid]);
9071 /* Decode simple location descriptions.
9072 Given a pointer to a dwarf block that defines a location, compute
9073 the location and return the value.
9075 NOTE drow/2003-11-18: This function is called in two situations
9076 now: for the address of static or global variables (partial symbols
9077 only) and for offsets into structures which are expected to be
9078 (more or less) constant. The partial symbol case should go away,
9079 and only the constant case should remain. That will let this
9080 function complain more accurately. A few special modes are allowed
9081 without complaint for global variables (for instance, global
9082 register values and thread-local values).
9084 A location description containing no operations indicates that the
9085 object is optimized out. The return value is 0 for that case.
9086 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9087 callers will only want a very basic result and this can become a
9090 Note that stack[0] is unused except as a default error return.
9091 Note that stack overflow is not yet handled. */
9094 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9096 struct objfile
*objfile
= cu
->objfile
;
9097 struct comp_unit_head
*cu_header
= &cu
->header
;
9099 int size
= blk
->size
;
9100 gdb_byte
*data
= blk
->data
;
9101 CORE_ADDR stack
[64];
9103 unsigned int bytes_read
, unsnd
;
9147 stack
[++stacki
] = op
- DW_OP_lit0
;
9182 stack
[++stacki
] = op
- DW_OP_reg0
;
9184 dwarf2_complex_location_expr_complaint ();
9188 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9190 stack
[++stacki
] = unsnd
;
9192 dwarf2_complex_location_expr_complaint ();
9196 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9202 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9207 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9212 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9217 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9222 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9227 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9232 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9238 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9243 stack
[stacki
+ 1] = stack
[stacki
];
9248 stack
[stacki
- 1] += stack
[stacki
];
9252 case DW_OP_plus_uconst
:
9253 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9258 stack
[stacki
- 1] -= stack
[stacki
];
9263 /* If we're not the last op, then we definitely can't encode
9264 this using GDB's address_class enum. This is valid for partial
9265 global symbols, although the variable's address will be bogus
9268 dwarf2_complex_location_expr_complaint ();
9271 case DW_OP_GNU_push_tls_address
:
9272 /* The top of the stack has the offset from the beginning
9273 of the thread control block at which the variable is located. */
9274 /* Nothing should follow this operator, so the top of stack would
9276 /* This is valid for partial global symbols, but the variable's
9277 address will be bogus in the psymtab. */
9279 dwarf2_complex_location_expr_complaint ();
9282 case DW_OP_GNU_uninit
:
9286 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9287 dwarf_stack_op_name (op
));
9288 return (stack
[stacki
]);
9291 return (stack
[stacki
]);
9294 /* memory allocation interface */
9296 static struct dwarf_block
*
9297 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9299 struct dwarf_block
*blk
;
9301 blk
= (struct dwarf_block
*)
9302 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9306 static struct abbrev_info
*
9307 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9309 struct abbrev_info
*abbrev
;
9311 abbrev
= (struct abbrev_info
*)
9312 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9313 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9317 static struct die_info
*
9318 dwarf_alloc_die (void)
9320 struct die_info
*die
;
9322 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
9323 memset (die
, 0, sizeof (struct die_info
));
9328 /* Macro support. */
9331 /* Return the full name of file number I in *LH's file name table.
9332 Use COMP_DIR as the name of the current directory of the
9333 compilation. The result is allocated using xmalloc; the caller is
9334 responsible for freeing it. */
9336 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9338 /* Is the file number a valid index into the line header's file name
9339 table? Remember that file numbers start with one, not zero. */
9340 if (1 <= file
&& file
<= lh
->num_file_names
)
9342 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9344 if (IS_ABSOLUTE_PATH (fe
->name
))
9345 return xstrdup (fe
->name
);
9353 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9359 dir_len
= strlen (dir
);
9360 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9361 strcpy (full_name
, dir
);
9362 full_name
[dir_len
] = '/';
9363 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9367 return xstrdup (fe
->name
);
9372 /* The compiler produced a bogus file number. We can at least
9373 record the macro definitions made in the file, even if we
9374 won't be able to find the file by name. */
9376 sprintf (fake_name
, "<bad macro file number %d>", file
);
9378 complaint (&symfile_complaints
,
9379 _("bad file number in macro information (%d)"),
9382 return xstrdup (fake_name
);
9387 static struct macro_source_file
*
9388 macro_start_file (int file
, int line
,
9389 struct macro_source_file
*current_file
,
9390 const char *comp_dir
,
9391 struct line_header
*lh
, struct objfile
*objfile
)
9393 /* The full name of this source file. */
9394 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9396 /* We don't create a macro table for this compilation unit
9397 at all until we actually get a filename. */
9398 if (! pending_macros
)
9399 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9400 objfile
->macro_cache
);
9403 /* If we have no current file, then this must be the start_file
9404 directive for the compilation unit's main source file. */
9405 current_file
= macro_set_main (pending_macros
, full_name
);
9407 current_file
= macro_include (current_file
, line
, full_name
);
9411 return current_file
;
9415 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9416 followed by a null byte. */
9418 copy_string (const char *buf
, int len
)
9420 char *s
= xmalloc (len
+ 1);
9421 memcpy (s
, buf
, len
);
9429 consume_improper_spaces (const char *p
, const char *body
)
9433 complaint (&symfile_complaints
,
9434 _("macro definition contains spaces in formal argument list:\n`%s'"),
9446 parse_macro_definition (struct macro_source_file
*file
, int line
,
9451 /* The body string takes one of two forms. For object-like macro
9452 definitions, it should be:
9454 <macro name> " " <definition>
9456 For function-like macro definitions, it should be:
9458 <macro name> "() " <definition>
9460 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9462 Spaces may appear only where explicitly indicated, and in the
9465 The Dwarf 2 spec says that an object-like macro's name is always
9466 followed by a space, but versions of GCC around March 2002 omit
9467 the space when the macro's definition is the empty string.
9469 The Dwarf 2 spec says that there should be no spaces between the
9470 formal arguments in a function-like macro's formal argument list,
9471 but versions of GCC around March 2002 include spaces after the
9475 /* Find the extent of the macro name. The macro name is terminated
9476 by either a space or null character (for an object-like macro) or
9477 an opening paren (for a function-like macro). */
9478 for (p
= body
; *p
; p
++)
9479 if (*p
== ' ' || *p
== '(')
9482 if (*p
== ' ' || *p
== '\0')
9484 /* It's an object-like macro. */
9485 int name_len
= p
- body
;
9486 char *name
= copy_string (body
, name_len
);
9487 const char *replacement
;
9490 replacement
= body
+ name_len
+ 1;
9493 dwarf2_macro_malformed_definition_complaint (body
);
9494 replacement
= body
+ name_len
;
9497 macro_define_object (file
, line
, name
, replacement
);
9503 /* It's a function-like macro. */
9504 char *name
= copy_string (body
, p
- body
);
9507 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9511 p
= consume_improper_spaces (p
, body
);
9513 /* Parse the formal argument list. */
9514 while (*p
&& *p
!= ')')
9516 /* Find the extent of the current argument name. */
9517 const char *arg_start
= p
;
9519 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9522 if (! *p
|| p
== arg_start
)
9523 dwarf2_macro_malformed_definition_complaint (body
);
9526 /* Make sure argv has room for the new argument. */
9527 if (argc
>= argv_size
)
9530 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9533 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9536 p
= consume_improper_spaces (p
, body
);
9538 /* Consume the comma, if present. */
9543 p
= consume_improper_spaces (p
, body
);
9552 /* Perfectly formed definition, no complaints. */
9553 macro_define_function (file
, line
, name
,
9554 argc
, (const char **) argv
,
9556 else if (*p
== '\0')
9558 /* Complain, but do define it. */
9559 dwarf2_macro_malformed_definition_complaint (body
);
9560 macro_define_function (file
, line
, name
,
9561 argc
, (const char **) argv
,
9565 /* Just complain. */
9566 dwarf2_macro_malformed_definition_complaint (body
);
9569 /* Just complain. */
9570 dwarf2_macro_malformed_definition_complaint (body
);
9576 for (i
= 0; i
< argc
; i
++)
9582 dwarf2_macro_malformed_definition_complaint (body
);
9587 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9588 char *comp_dir
, bfd
*abfd
,
9589 struct dwarf2_cu
*cu
)
9591 gdb_byte
*mac_ptr
, *mac_end
;
9592 struct macro_source_file
*current_file
= 0;
9594 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9596 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9600 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9601 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9602 + dwarf2_per_objfile
->macinfo_size
;
9606 enum dwarf_macinfo_record_type macinfo_type
;
9608 /* Do we at least have room for a macinfo type byte? */
9609 if (mac_ptr
>= mac_end
)
9611 dwarf2_macros_too_long_complaint ();
9615 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9618 switch (macinfo_type
)
9620 /* A zero macinfo type indicates the end of the macro
9625 case DW_MACINFO_define
:
9626 case DW_MACINFO_undef
:
9628 unsigned int bytes_read
;
9632 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9633 mac_ptr
+= bytes_read
;
9634 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9635 mac_ptr
+= bytes_read
;
9638 complaint (&symfile_complaints
,
9639 _("debug info gives macro %s outside of any file: %s"),
9641 DW_MACINFO_define
? "definition" : macinfo_type
==
9642 DW_MACINFO_undef
? "undefinition" :
9643 "something-or-other", body
);
9646 if (macinfo_type
== DW_MACINFO_define
)
9647 parse_macro_definition (current_file
, line
, body
);
9648 else if (macinfo_type
== DW_MACINFO_undef
)
9649 macro_undef (current_file
, line
, body
);
9654 case DW_MACINFO_start_file
:
9656 unsigned int bytes_read
;
9659 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9660 mac_ptr
+= bytes_read
;
9661 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9662 mac_ptr
+= bytes_read
;
9664 current_file
= macro_start_file (file
, line
,
9665 current_file
, comp_dir
,
9670 case DW_MACINFO_end_file
:
9672 complaint (&symfile_complaints
,
9673 _("macro debug info has an unmatched `close_file' directive"));
9676 current_file
= current_file
->included_by
;
9679 enum dwarf_macinfo_record_type next_type
;
9681 /* GCC circa March 2002 doesn't produce the zero
9682 type byte marking the end of the compilation
9683 unit. Complain if it's not there, but exit no
9686 /* Do we at least have room for a macinfo type byte? */
9687 if (mac_ptr
>= mac_end
)
9689 dwarf2_macros_too_long_complaint ();
9693 /* We don't increment mac_ptr here, so this is just
9695 next_type
= read_1_byte (abfd
, mac_ptr
);
9697 complaint (&symfile_complaints
,
9698 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9705 case DW_MACINFO_vendor_ext
:
9707 unsigned int bytes_read
;
9711 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9712 mac_ptr
+= bytes_read
;
9713 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9714 mac_ptr
+= bytes_read
;
9716 /* We don't recognize any vendor extensions. */
9723 /* Check if the attribute's form is a DW_FORM_block*
9724 if so return true else false. */
9726 attr_form_is_block (struct attribute
*attr
)
9728 return (attr
== NULL
? 0 :
9729 attr
->form
== DW_FORM_block1
9730 || attr
->form
== DW_FORM_block2
9731 || attr
->form
== DW_FORM_block4
9732 || attr
->form
== DW_FORM_block
);
9736 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9737 struct dwarf2_cu
*cu
)
9739 struct objfile
*objfile
= cu
->objfile
;
9741 /* Save the master objfile, so that we can report and look up the
9742 correct file containing this variable. */
9743 if (objfile
->separate_debug_objfile_backlink
)
9744 objfile
= objfile
->separate_debug_objfile_backlink
;
9746 if ((attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
9747 /* ".debug_loc" may not exist at all, or the offset may be outside
9748 the section. If so, fall through to the complaint in the
9750 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9752 struct dwarf2_loclist_baton
*baton
;
9754 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9755 sizeof (struct dwarf2_loclist_baton
));
9756 baton
->objfile
= objfile
;
9758 /* We don't know how long the location list is, but make sure we
9759 don't run off the edge of the section. */
9760 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9761 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
9762 baton
->base_address
= cu
->header
.base_address
;
9763 if (cu
->header
.base_known
== 0)
9764 complaint (&symfile_complaints
,
9765 _("Location list used without specifying the CU base address."));
9767 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
9768 SYMBOL_LOCATION_BATON (sym
) = baton
;
9772 struct dwarf2_locexpr_baton
*baton
;
9774 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9775 sizeof (struct dwarf2_locexpr_baton
));
9776 baton
->objfile
= objfile
;
9778 if (attr_form_is_block (attr
))
9780 /* Note that we're just copying the block's data pointer
9781 here, not the actual data. We're still pointing into the
9782 info_buffer for SYM's objfile; right now we never release
9783 that buffer, but when we do clean up properly this may
9785 baton
->size
= DW_BLOCK (attr
)->size
;
9786 baton
->data
= DW_BLOCK (attr
)->data
;
9790 dwarf2_invalid_attrib_class_complaint ("location description",
9791 SYMBOL_NATURAL_NAME (sym
));
9796 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
9797 SYMBOL_LOCATION_BATON (sym
) = baton
;
9801 /* Locate the compilation unit from CU's objfile which contains the
9802 DIE at OFFSET. Raises an error on failure. */
9804 static struct dwarf2_per_cu_data
*
9805 dwarf2_find_containing_comp_unit (unsigned long offset
,
9806 struct objfile
*objfile
)
9808 struct dwarf2_per_cu_data
*this_cu
;
9812 high
= dwarf2_per_objfile
->n_comp_units
- 1;
9815 int mid
= low
+ (high
- low
) / 2;
9816 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
9821 gdb_assert (low
== high
);
9822 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
9825 error (_("Dwarf Error: could not find partial DIE containing "
9826 "offset 0x%lx [in module %s]"),
9827 (long) offset
, bfd_get_filename (objfile
->obfd
));
9829 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
9830 return dwarf2_per_objfile
->all_comp_units
[low
-1];
9834 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
9835 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
9836 && offset
>= this_cu
->offset
+ this_cu
->length
)
9837 error (_("invalid dwarf2 offset %ld"), offset
);
9838 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
9843 /* Locate the compilation unit from OBJFILE which is located at exactly
9844 OFFSET. Raises an error on failure. */
9846 static struct dwarf2_per_cu_data
*
9847 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
9849 struct dwarf2_per_cu_data
*this_cu
;
9850 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
9851 if (this_cu
->offset
!= offset
)
9852 error (_("no compilation unit with offset %ld."), offset
);
9856 /* Release one cached compilation unit, CU. We unlink it from the tree
9857 of compilation units, but we don't remove it from the read_in_chain;
9858 the caller is responsible for that. */
9861 free_one_comp_unit (void *data
)
9863 struct dwarf2_cu
*cu
= data
;
9865 if (cu
->per_cu
!= NULL
)
9866 cu
->per_cu
->cu
= NULL
;
9869 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9871 free_die_list (cu
->dies
);
9876 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9877 when we're finished with it. We can't free the pointer itself, but be
9878 sure to unlink it from the cache. Also release any associated storage
9879 and perform cache maintenance.
9881 Only used during partial symbol parsing. */
9884 free_stack_comp_unit (void *data
)
9886 struct dwarf2_cu
*cu
= data
;
9888 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9889 cu
->partial_dies
= NULL
;
9891 if (cu
->per_cu
!= NULL
)
9893 /* This compilation unit is on the stack in our caller, so we
9894 should not xfree it. Just unlink it. */
9895 cu
->per_cu
->cu
= NULL
;
9898 /* If we had a per-cu pointer, then we may have other compilation
9899 units loaded, so age them now. */
9900 age_cached_comp_units ();
9904 /* Free all cached compilation units. */
9907 free_cached_comp_units (void *data
)
9909 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9911 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9912 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9913 while (per_cu
!= NULL
)
9915 struct dwarf2_per_cu_data
*next_cu
;
9917 next_cu
= per_cu
->cu
->read_in_chain
;
9919 free_one_comp_unit (per_cu
->cu
);
9920 *last_chain
= next_cu
;
9926 /* Increase the age counter on each cached compilation unit, and free
9927 any that are too old. */
9930 age_cached_comp_units (void)
9932 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9934 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
9935 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9936 while (per_cu
!= NULL
)
9938 per_cu
->cu
->last_used
++;
9939 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
9940 dwarf2_mark (per_cu
->cu
);
9941 per_cu
= per_cu
->cu
->read_in_chain
;
9944 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9945 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9946 while (per_cu
!= NULL
)
9948 struct dwarf2_per_cu_data
*next_cu
;
9950 next_cu
= per_cu
->cu
->read_in_chain
;
9952 if (!per_cu
->cu
->mark
)
9954 free_one_comp_unit (per_cu
->cu
);
9955 *last_chain
= next_cu
;
9958 last_chain
= &per_cu
->cu
->read_in_chain
;
9964 /* Remove a single compilation unit from the cache. */
9967 free_one_cached_comp_unit (void *target_cu
)
9969 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9971 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9972 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9973 while (per_cu
!= NULL
)
9975 struct dwarf2_per_cu_data
*next_cu
;
9977 next_cu
= per_cu
->cu
->read_in_chain
;
9979 if (per_cu
->cu
== target_cu
)
9981 free_one_comp_unit (per_cu
->cu
);
9982 *last_chain
= next_cu
;
9986 last_chain
= &per_cu
->cu
->read_in_chain
;
9992 /* Release all extra memory associated with OBJFILE. */
9995 dwarf2_free_objfile (struct objfile
*objfile
)
9997 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
9999 if (dwarf2_per_objfile
== NULL
)
10002 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10003 free_cached_comp_units (NULL
);
10005 /* Everything else should be on the objfile obstack. */
10008 /* A pair of DIE offset and GDB type pointer. We store these
10009 in a hash table separate from the DIEs, and preserve them
10010 when the DIEs are flushed out of cache. */
10012 struct dwarf2_offset_and_type
10014 unsigned int offset
;
10018 /* Hash function for a dwarf2_offset_and_type. */
10021 offset_and_type_hash (const void *item
)
10023 const struct dwarf2_offset_and_type
*ofs
= item
;
10024 return ofs
->offset
;
10027 /* Equality function for a dwarf2_offset_and_type. */
10030 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
10032 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
10033 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
10034 return ofs_lhs
->offset
== ofs_rhs
->offset
;
10037 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10038 table if necessary. */
10041 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10043 struct dwarf2_offset_and_type
**slot
, ofs
;
10047 if (cu
->per_cu
== NULL
)
10050 if (cu
->per_cu
->type_hash
== NULL
)
10051 cu
->per_cu
->type_hash
10052 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10053 offset_and_type_hash
,
10054 offset_and_type_eq
,
10056 &cu
->objfile
->objfile_obstack
,
10057 hashtab_obstack_allocate
,
10058 dummy_obstack_deallocate
);
10060 ofs
.offset
= die
->offset
;
10062 slot
= (struct dwarf2_offset_and_type
**)
10063 htab_find_slot_with_hash (cu
->per_cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10064 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10068 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10069 have a saved type. */
10071 static struct type
*
10072 get_die_type (struct die_info
*die
, htab_t type_hash
)
10074 struct dwarf2_offset_and_type
*slot
, ofs
;
10076 ofs
.offset
= die
->offset
;
10077 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10084 /* Restore the types of the DIE tree starting at START_DIE from the hash
10085 table saved in CU. */
10088 reset_die_and_siblings_types (struct die_info
*start_die
, struct dwarf2_cu
*cu
)
10090 struct die_info
*die
;
10092 if (cu
->per_cu
->type_hash
== NULL
)
10095 for (die
= start_die
; die
!= NULL
; die
= die
->sibling
)
10097 die
->type
= get_die_type (die
, cu
->per_cu
->type_hash
);
10098 if (die
->child
!= NULL
)
10099 reset_die_and_siblings_types (die
->child
, cu
);
10103 /* Set the mark field in CU and in every other compilation unit in the
10104 cache that we must keep because we are keeping CU. */
10106 /* Add a dependence relationship from CU to REF_PER_CU. */
10109 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10110 struct dwarf2_per_cu_data
*ref_per_cu
)
10114 if (cu
->dependencies
== NULL
)
10116 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10117 NULL
, &cu
->comp_unit_obstack
,
10118 hashtab_obstack_allocate
,
10119 dummy_obstack_deallocate
);
10121 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10123 *slot
= ref_per_cu
;
10126 /* Set the mark field in CU and in every other compilation unit in the
10127 cache that we must keep because we are keeping CU. */
10130 dwarf2_mark_helper (void **slot
, void *data
)
10132 struct dwarf2_per_cu_data
*per_cu
;
10134 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10135 if (per_cu
->cu
->mark
)
10137 per_cu
->cu
->mark
= 1;
10139 if (per_cu
->cu
->dependencies
!= NULL
)
10140 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10146 dwarf2_mark (struct dwarf2_cu
*cu
)
10151 if (cu
->dependencies
!= NULL
)
10152 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10156 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10160 per_cu
->cu
->mark
= 0;
10161 per_cu
= per_cu
->cu
->read_in_chain
;
10165 /* Trivial hash function for partial_die_info: the hash value of a DIE
10166 is its offset in .debug_info for this objfile. */
10169 partial_die_hash (const void *item
)
10171 const struct partial_die_info
*part_die
= item
;
10172 return part_die
->offset
;
10175 /* Trivial comparison function for partial_die_info structures: two DIEs
10176 are equal if they have the same offset. */
10179 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10181 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10182 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10183 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10186 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10187 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10190 set_dwarf2_cmd (char *args
, int from_tty
)
10192 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10196 show_dwarf2_cmd (char *args
, int from_tty
)
10198 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10201 void _initialize_dwarf2_read (void);
10204 _initialize_dwarf2_read (void)
10206 dwarf2_objfile_data_key
= register_objfile_data ();
10208 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10209 Set DWARF 2 specific variables.\n\
10210 Configure DWARF 2 variables such as the cache size"),
10211 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10212 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10214 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10215 Show DWARF 2 specific variables\n\
10216 Show DWARF 2 variables such as the cache size"),
10217 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10218 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10220 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10221 &dwarf2_max_cache_age
, _("\
10222 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10223 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10224 A higher limit means that cached compilation units will be stored\n\
10225 in memory longer, and more total memory will be used. Zero disables\n\
10226 caching, which can slow down startup."),
10228 show_dwarf2_max_cache_age
,
10229 &set_dwarf2_cmdlist
,
10230 &show_dwarf2_cmdlist
);