1 /* Support routines for building symbol tables in GDB's internal format.
2 Copyright (C) 1986-2015 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This module provides subroutines used for creating and adding to
20 the symbol table. These routines are called from various symbol-
21 file-reading routines.
23 Routines to support specific debugging information formats (stabs,
24 DWARF, etc) belong somewhere else.
26 The basic way this module is used is as follows:
29 cleanups = make_cleanup (really_free_pendings, NULL);
30 cust = start_symtab (...);
31 ... read debug info ...
32 cust = end_symtab (...);
33 do_cleanups (cleanups);
35 The compunit symtab pointer ("cust") is returned from both start_symtab
36 and end_symtab to simplify the debug info readers.
38 There are minor variations on this, e.g., dwarf2read.c splits end_symtab
39 into two calls: end_symtab_get_static_block, end_symtab_from_static_block,
40 but all debug info readers follow this basic flow.
42 Reading DWARF Type Units is another variation:
45 cleanups = make_cleanup (really_free_pendings, NULL);
46 cust = start_symtab (...);
47 ... read debug info ...
48 cust = end_expandable_symtab (...);
49 do_cleanups (cleanups);
51 And then reading subsequent Type Units within the containing "Comp Unit"
52 will use a second flow:
55 cleanups = make_cleanup (really_free_pendings, NULL);
56 cust = restart_symtab (...);
57 ... read debug info ...
58 cust = augment_type_symtab (...);
59 do_cleanups (cleanups);
61 dbxread.c and xcoffread.c use another variation:
64 cleanups = make_cleanup (really_free_pendings, NULL);
65 cust = start_symtab (...);
66 ... read debug info ...
67 cust = end_symtab (...);
68 ... start_symtab + read + end_symtab repeated ...
69 do_cleanups (cleanups);
74 #include "gdb_obstack.h"
79 #include "complaints.h"
80 #include "expression.h" /* For "enum exp_opcode" used by... */
82 #include "filenames.h" /* For DOSish file names. */
84 #include "demangle.h" /* Needed by SYMBOL_INIT_DEMANGLED_NAME. */
86 #include "cp-support.h"
87 #include "dictionary.h"
90 /* Ask buildsym.h to define the vars it normally declares `extern'. */
93 #include "buildsym.h" /* Our own declarations. */
96 /* For cleanup_undefined_stabs_types and finish_global_stabs (somewhat
97 questionable--see comment where we call them). */
99 #include "stabsread.h"
101 /* Buildsym's counterpart to struct compunit_symtab.
102 TODO(dje): Move all related global state into here. */
104 struct buildsym_compunit
106 /* The objfile we're reading debug info from. */
107 struct objfile
*objfile
;
109 /* List of subfiles (source files).
110 Files are added to the front of the list.
111 This is important mostly for the language determination hacks we use,
112 which iterate over previously added files. */
113 struct subfile
*subfiles
;
115 /* The subfile of the main source file. */
116 struct subfile
*main_subfile
;
118 /* E.g., DW_AT_comp_dir if DWARF. Space for this is malloc'd. */
121 /* Space for this is not malloc'd, and is assumed to have at least
122 the same lifetime as objfile. */
123 const char *producer
;
125 /* Space for this is not malloc'd, and is assumed to have at least
126 the same lifetime as objfile. */
127 const char *debugformat
;
129 /* The compunit we are building. */
130 struct compunit_symtab
*compunit_symtab
;
133 /* The work-in-progress of the compunit we are building.
134 This is created first, before any subfiles by start_symtab. */
136 static struct buildsym_compunit
*buildsym_compunit
;
138 /* List of free `struct pending' structures for reuse. */
140 static struct pending
*free_pendings
;
142 /* Non-zero if symtab has line number info. This prevents an
143 otherwise empty symtab from being tossed. */
145 static int have_line_numbers
;
147 /* The mutable address map for the compilation unit whose symbols
148 we're currently reading. The symtabs' shared blockvector will
149 point to a fixed copy of this. */
150 static struct addrmap
*pending_addrmap
;
152 /* The obstack on which we allocate pending_addrmap.
153 If pending_addrmap is NULL, this is uninitialized; otherwise, it is
154 initialized (and holds pending_addrmap). */
155 static struct obstack pending_addrmap_obstack
;
157 /* Non-zero if we recorded any ranges in the addrmap that are
158 different from those in the blockvector already. We set this to
159 zero when we start processing a symfile, and if it's still zero at
160 the end, then we just toss the addrmap. */
161 static int pending_addrmap_interesting
;
163 /* An obstack used for allocating pending blocks. */
165 static struct obstack pending_block_obstack
;
167 /* List of blocks already made (lexical contexts already closed).
168 This is used at the end to make the blockvector. */
172 struct pending_block
*next
;
176 /* Pointer to the head of a linked list of symbol blocks which have
177 already been finalized (lexical contexts already closed) and which
178 are just waiting to be built into a blockvector when finalizing the
179 associated symtab. */
181 static struct pending_block
*pending_blocks
;
185 struct subfile_stack
*next
;
189 static struct subfile_stack
*subfile_stack
;
191 /* The macro table for the compilation unit whose symbols we're
192 currently reading. */
193 static struct macro_table
*pending_macros
;
195 static void free_buildsym_compunit (void);
197 static int compare_line_numbers (const void *ln1p
, const void *ln2p
);
199 static void record_pending_block (struct objfile
*objfile
,
201 struct pending_block
*opblock
);
203 /* Initial sizes of data structures. These are realloc'd larger if
204 needed, and realloc'd down to the size actually used, when
207 #define INITIAL_CONTEXT_STACK_SIZE 10
208 #define INITIAL_LINE_VECTOR_LENGTH 1000
211 /* Maintain the lists of symbols and blocks. */
213 /* Add a symbol to one of the lists of symbols. */
216 add_symbol_to_list (struct symbol
*symbol
, struct pending
**listhead
)
218 struct pending
*link
;
220 /* If this is an alias for another symbol, don't add it. */
221 if (symbol
->ginfo
.name
&& symbol
->ginfo
.name
[0] == '#')
224 /* We keep PENDINGSIZE symbols in each link of the list. If we
225 don't have a link with room in it, add a new link. */
226 if (*listhead
== NULL
|| (*listhead
)->nsyms
== PENDINGSIZE
)
230 link
= free_pendings
;
231 free_pendings
= link
->next
;
235 link
= (struct pending
*) xmalloc (sizeof (struct pending
));
238 link
->next
= *listhead
;
243 (*listhead
)->symbol
[(*listhead
)->nsyms
++] = symbol
;
246 /* Find a symbol named NAME on a LIST. NAME need not be
247 '\0'-terminated; LENGTH is the length of the name. */
250 find_symbol_in_list (struct pending
*list
, char *name
, int length
)
257 for (j
= list
->nsyms
; --j
>= 0;)
259 pp
= SYMBOL_LINKAGE_NAME (list
->symbol
[j
]);
260 if (*pp
== *name
&& strncmp (pp
, name
, length
) == 0
261 && pp
[length
] == '\0')
263 return (list
->symbol
[j
]);
271 /* At end of reading syms, or in case of quit, ensure everything associated
272 with building symtabs is freed. This is intended to be registered as a
273 cleanup before doing psymtab->symtab expansion.
275 N.B. This is *not* intended to be used when building psymtabs. Some debug
276 info readers call this anyway, which is harmless if confusing. */
279 really_free_pendings (void *dummy
)
281 struct pending
*next
, *next1
;
283 for (next
= free_pendings
; next
; next
= next1
)
286 xfree ((void *) next
);
288 free_pendings
= NULL
;
290 free_pending_blocks ();
292 for (next
= file_symbols
; next
!= NULL
; next
= next1
)
295 xfree ((void *) next
);
299 for (next
= global_symbols
; next
!= NULL
; next
= next1
)
302 xfree ((void *) next
);
304 global_symbols
= NULL
;
307 free_macro_table (pending_macros
);
308 pending_macros
= NULL
;
311 obstack_free (&pending_addrmap_obstack
, NULL
);
312 pending_addrmap
= NULL
;
314 free_buildsym_compunit ();
317 /* This function is called to discard any pending blocks. */
320 free_pending_blocks (void)
322 if (pending_blocks
!= NULL
)
324 obstack_free (&pending_block_obstack
, NULL
);
325 pending_blocks
= NULL
;
329 /* Take one of the lists of symbols and make a block from it. Keep
330 the order the symbols have in the list (reversed from the input
331 file). Put the block on the list of pending blocks. */
333 static struct block
*
334 finish_block_internal (struct symbol
*symbol
, struct pending
**listhead
,
335 struct pending_block
*old_blocks
,
336 CORE_ADDR start
, CORE_ADDR end
,
337 int is_global
, int expandable
)
339 struct objfile
*objfile
= buildsym_compunit
->objfile
;
340 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
341 struct pending
*next
, *next1
;
343 struct pending_block
*pblock
;
344 struct pending_block
*opblock
;
347 ? allocate_global_block (&objfile
->objfile_obstack
)
348 : allocate_block (&objfile
->objfile_obstack
));
352 BLOCK_DICT (block
) = dict_create_linear (&objfile
->objfile_obstack
,
359 BLOCK_DICT (block
) = dict_create_hashed_expandable ();
360 dict_add_pending (BLOCK_DICT (block
), *listhead
);
365 dict_create_hashed (&objfile
->objfile_obstack
, *listhead
);
369 BLOCK_START (block
) = start
;
370 BLOCK_END (block
) = end
;
372 /* Put the block in as the value of the symbol that names it. */
376 struct type
*ftype
= SYMBOL_TYPE (symbol
);
377 struct dict_iterator iter
;
378 SYMBOL_BLOCK_VALUE (symbol
) = block
;
379 BLOCK_FUNCTION (block
) = symbol
;
381 if (TYPE_NFIELDS (ftype
) <= 0)
383 /* No parameter type information is recorded with the
384 function's type. Set that from the type of the
385 parameter symbols. */
386 int nparams
= 0, iparams
;
389 /* Here we want to directly access the dictionary, because
390 we haven't fully initialized the block yet. */
391 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
393 if (SYMBOL_IS_ARGUMENT (sym
))
398 TYPE_NFIELDS (ftype
) = nparams
;
399 TYPE_FIELDS (ftype
) = (struct field
*)
400 TYPE_ALLOC (ftype
, nparams
* sizeof (struct field
));
403 /* Here we want to directly access the dictionary, because
404 we haven't fully initialized the block yet. */
405 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
407 if (iparams
== nparams
)
410 if (SYMBOL_IS_ARGUMENT (sym
))
412 TYPE_FIELD_TYPE (ftype
, iparams
) = SYMBOL_TYPE (sym
);
413 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
422 BLOCK_FUNCTION (block
) = NULL
;
425 /* Now "free" the links of the list, and empty the list. */
427 for (next
= *listhead
; next
; next
= next1
)
430 next
->next
= free_pendings
;
431 free_pendings
= next
;
435 /* Check to be sure that the blocks have an end address that is
436 greater than starting address. */
438 if (BLOCK_END (block
) < BLOCK_START (block
))
442 complaint (&symfile_complaints
,
443 _("block end address less than block "
444 "start address in %s (patched it)"),
445 SYMBOL_PRINT_NAME (symbol
));
449 complaint (&symfile_complaints
,
450 _("block end address %s less than block "
451 "start address %s (patched it)"),
452 paddress (gdbarch
, BLOCK_END (block
)),
453 paddress (gdbarch
, BLOCK_START (block
)));
455 /* Better than nothing. */
456 BLOCK_END (block
) = BLOCK_START (block
);
459 /* Install this block as the superblock of all blocks made since the
460 start of this scope that don't have superblocks yet. */
463 for (pblock
= pending_blocks
;
464 pblock
&& pblock
!= old_blocks
;
465 pblock
= pblock
->next
)
467 if (BLOCK_SUPERBLOCK (pblock
->block
) == NULL
)
469 /* Check to be sure the blocks are nested as we receive
470 them. If the compiler/assembler/linker work, this just
471 burns a small amount of time.
473 Skip blocks which correspond to a function; they're not
474 physically nested inside this other blocks, only
476 if (BLOCK_FUNCTION (pblock
->block
) == NULL
477 && (BLOCK_START (pblock
->block
) < BLOCK_START (block
)
478 || BLOCK_END (pblock
->block
) > BLOCK_END (block
)))
482 complaint (&symfile_complaints
,
483 _("inner block not inside outer block in %s"),
484 SYMBOL_PRINT_NAME (symbol
));
488 complaint (&symfile_complaints
,
489 _("inner block (%s-%s) not "
490 "inside outer block (%s-%s)"),
491 paddress (gdbarch
, BLOCK_START (pblock
->block
)),
492 paddress (gdbarch
, BLOCK_END (pblock
->block
)),
493 paddress (gdbarch
, BLOCK_START (block
)),
494 paddress (gdbarch
, BLOCK_END (block
)));
496 if (BLOCK_START (pblock
->block
) < BLOCK_START (block
))
497 BLOCK_START (pblock
->block
) = BLOCK_START (block
);
498 if (BLOCK_END (pblock
->block
) > BLOCK_END (block
))
499 BLOCK_END (pblock
->block
) = BLOCK_END (block
);
501 BLOCK_SUPERBLOCK (pblock
->block
) = block
;
506 block_set_using (block
,
508 ? global_using_directives
509 : local_using_directives
),
510 &objfile
->objfile_obstack
);
512 global_using_directives
= NULL
;
514 local_using_directives
= NULL
;
516 record_pending_block (objfile
, block
, opblock
);
522 finish_block (struct symbol
*symbol
, struct pending
**listhead
,
523 struct pending_block
*old_blocks
,
524 CORE_ADDR start
, CORE_ADDR end
)
526 return finish_block_internal (symbol
, listhead
, old_blocks
,
530 /* Record BLOCK on the list of all blocks in the file. Put it after
531 OPBLOCK, or at the beginning if opblock is NULL. This puts the
532 block in the list after all its subblocks.
534 Allocate the pending block struct in the objfile_obstack to save
535 time. This wastes a little space. FIXME: Is it worth it? */
538 record_pending_block (struct objfile
*objfile
, struct block
*block
,
539 struct pending_block
*opblock
)
541 struct pending_block
*pblock
;
543 if (pending_blocks
== NULL
)
544 obstack_init (&pending_block_obstack
);
546 pblock
= (struct pending_block
*)
547 obstack_alloc (&pending_block_obstack
, sizeof (struct pending_block
));
548 pblock
->block
= block
;
551 pblock
->next
= opblock
->next
;
552 opblock
->next
= pblock
;
556 pblock
->next
= pending_blocks
;
557 pending_blocks
= pblock
;
562 /* Record that the range of addresses from START to END_INCLUSIVE
563 (inclusive, like it says) belongs to BLOCK. BLOCK's start and end
564 addresses must be set already. You must apply this function to all
565 BLOCK's children before applying it to BLOCK.
567 If a call to this function complicates the picture beyond that
568 already provided by BLOCK_START and BLOCK_END, then we create an
569 address map for the block. */
571 record_block_range (struct block
*block
,
572 CORE_ADDR start
, CORE_ADDR end_inclusive
)
574 /* If this is any different from the range recorded in the block's
575 own BLOCK_START and BLOCK_END, then note that the address map has
576 become interesting. Note that even if this block doesn't have
577 any "interesting" ranges, some later block might, so we still
578 need to record this block in the addrmap. */
579 if (start
!= BLOCK_START (block
)
580 || end_inclusive
+ 1 != BLOCK_END (block
))
581 pending_addrmap_interesting
= 1;
583 if (! pending_addrmap
)
585 obstack_init (&pending_addrmap_obstack
);
586 pending_addrmap
= addrmap_create_mutable (&pending_addrmap_obstack
);
589 addrmap_set_empty (pending_addrmap
, start
, end_inclusive
, block
);
592 static struct blockvector
*
593 make_blockvector (void)
595 struct objfile
*objfile
= buildsym_compunit
->objfile
;
596 struct pending_block
*next
;
597 struct blockvector
*blockvector
;
600 /* Count the length of the list of blocks. */
602 for (next
= pending_blocks
, i
= 0; next
; next
= next
->next
, i
++)
606 blockvector
= (struct blockvector
*)
607 obstack_alloc (&objfile
->objfile_obstack
,
608 (sizeof (struct blockvector
)
609 + (i
- 1) * sizeof (struct block
*)));
611 /* Copy the blocks into the blockvector. This is done in reverse
612 order, which happens to put the blocks into the proper order
613 (ascending starting address). finish_block has hair to insert
614 each block into the list after its subblocks in order to make
615 sure this is true. */
617 BLOCKVECTOR_NBLOCKS (blockvector
) = i
;
618 for (next
= pending_blocks
; next
; next
= next
->next
)
620 BLOCKVECTOR_BLOCK (blockvector
, --i
) = next
->block
;
623 free_pending_blocks ();
625 /* If we needed an address map for this symtab, record it in the
627 if (pending_addrmap
&& pending_addrmap_interesting
)
628 BLOCKVECTOR_MAP (blockvector
)
629 = addrmap_create_fixed (pending_addrmap
, &objfile
->objfile_obstack
);
631 BLOCKVECTOR_MAP (blockvector
) = 0;
633 /* Some compilers output blocks in the wrong order, but we depend on
634 their being in the right order so we can binary search. Check the
635 order and moan about it.
636 Note: Remember that the first two blocks are the global and static
637 blocks. We could special case that fact and begin checking at block 2.
638 To avoid making that assumption we do not. */
639 if (BLOCKVECTOR_NBLOCKS (blockvector
) > 1)
641 for (i
= 1; i
< BLOCKVECTOR_NBLOCKS (blockvector
); i
++)
643 if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
- 1))
644 > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
)))
647 = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
));
649 complaint (&symfile_complaints
, _("block at %s out of order"),
650 hex_string ((LONGEST
) start
));
655 return (blockvector
);
658 /* Start recording information about source code that came from an
659 included (or otherwise merged-in) source file with a different
660 name. NAME is the name of the file (cannot be NULL). */
663 start_subfile (const char *name
)
665 const char *subfile_dirname
;
666 struct subfile
*subfile
;
668 gdb_assert (buildsym_compunit
!= NULL
);
670 subfile_dirname
= buildsym_compunit
->comp_dir
;
672 /* See if this subfile is already registered. */
674 for (subfile
= buildsym_compunit
->subfiles
; subfile
; subfile
= subfile
->next
)
678 /* If NAME is an absolute path, and this subfile is not, then
679 attempt to create an absolute path to compare. */
680 if (IS_ABSOLUTE_PATH (name
)
681 && !IS_ABSOLUTE_PATH (subfile
->name
)
682 && subfile_dirname
!= NULL
)
683 subfile_name
= concat (subfile_dirname
, SLASH_STRING
,
684 subfile
->name
, (char *) NULL
);
686 subfile_name
= subfile
->name
;
688 if (FILENAME_CMP (subfile_name
, name
) == 0)
690 current_subfile
= subfile
;
691 if (subfile_name
!= subfile
->name
)
692 xfree (subfile_name
);
695 if (subfile_name
!= subfile
->name
)
696 xfree (subfile_name
);
699 /* This subfile is not known. Add an entry for it. */
701 subfile
= (struct subfile
*) xmalloc (sizeof (struct subfile
));
702 memset (subfile
, 0, sizeof (struct subfile
));
703 subfile
->buildsym_compunit
= buildsym_compunit
;
705 subfile
->next
= buildsym_compunit
->subfiles
;
706 buildsym_compunit
->subfiles
= subfile
;
708 current_subfile
= subfile
;
710 subfile
->name
= xstrdup (name
);
712 /* Initialize line-number recording for this subfile. */
713 subfile
->line_vector
= NULL
;
715 /* Default the source language to whatever can be deduced from the
716 filename. If nothing can be deduced (such as for a C/C++ include
717 file with a ".h" extension), then inherit whatever language the
718 previous subfile had. This kludgery is necessary because there
719 is no standard way in some object formats to record the source
720 language. Also, when symtabs are allocated we try to deduce a
721 language then as well, but it is too late for us to use that
722 information while reading symbols, since symtabs aren't allocated
723 until after all the symbols have been processed for a given
726 subfile
->language
= deduce_language_from_filename (subfile
->name
);
727 if (subfile
->language
== language_unknown
728 && subfile
->next
!= NULL
)
730 subfile
->language
= subfile
->next
->language
;
733 /* If the filename of this subfile ends in .C, then change the
734 language of any pending subfiles from C to C++. We also accept
735 any other C++ suffixes accepted by deduce_language_from_filename. */
736 /* Likewise for f2c. */
741 enum language sublang
= deduce_language_from_filename (subfile
->name
);
743 if (sublang
== language_cplus
|| sublang
== language_fortran
)
744 for (s
= buildsym_compunit
->subfiles
; s
!= NULL
; s
= s
->next
)
745 if (s
->language
== language_c
)
746 s
->language
= sublang
;
749 /* And patch up this file if necessary. */
750 if (subfile
->language
== language_c
751 && subfile
->next
!= NULL
752 && (subfile
->next
->language
== language_cplus
753 || subfile
->next
->language
== language_fortran
))
755 subfile
->language
= subfile
->next
->language
;
759 /* Start recording information about a primary source file (IOW, not an
760 included source file).
761 COMP_DIR is the directory in which the compilation unit was compiled
762 (or NULL if not known). */
764 static struct buildsym_compunit
*
765 start_buildsym_compunit (struct objfile
*objfile
, const char *comp_dir
)
767 struct buildsym_compunit
*bscu
;
769 bscu
= (struct buildsym_compunit
*)
770 xmalloc (sizeof (struct buildsym_compunit
));
771 memset (bscu
, 0, sizeof (struct buildsym_compunit
));
773 bscu
->objfile
= objfile
;
774 bscu
->comp_dir
= (comp_dir
== NULL
) ? NULL
: xstrdup (comp_dir
);
776 /* Initialize the debug format string to NULL. We may supply it
777 later via a call to record_debugformat. */
778 bscu
->debugformat
= NULL
;
780 /* Similarly for the producer. */
781 bscu
->producer
= NULL
;
786 /* Delete the buildsym compunit. */
789 free_buildsym_compunit (void)
791 struct subfile
*subfile
, *nextsub
;
793 if (buildsym_compunit
== NULL
)
795 for (subfile
= buildsym_compunit
->subfiles
;
799 nextsub
= subfile
->next
;
800 xfree (subfile
->name
);
801 xfree (subfile
->line_vector
);
804 xfree (buildsym_compunit
->comp_dir
);
805 xfree (buildsym_compunit
);
806 buildsym_compunit
= NULL
;
807 current_subfile
= NULL
;
810 /* For stabs readers, the first N_SO symbol is assumed to be the
811 source file name, and the subfile struct is initialized using that
812 assumption. If another N_SO symbol is later seen, immediately
813 following the first one, then the first one is assumed to be the
814 directory name and the second one is really the source file name.
816 So we have to patch up the subfile struct by moving the old name
817 value to dirname and remembering the new name. Some sanity
818 checking is performed to ensure that the state of the subfile
819 struct is reasonable and that the old name we are assuming to be a
820 directory name actually is (by checking for a trailing '/'). */
823 patch_subfile_names (struct subfile
*subfile
, char *name
)
826 && buildsym_compunit
->comp_dir
== NULL
827 && subfile
->name
!= NULL
828 && IS_DIR_SEPARATOR (subfile
->name
[strlen (subfile
->name
) - 1]))
830 buildsym_compunit
->comp_dir
= subfile
->name
;
831 subfile
->name
= xstrdup (name
);
832 set_last_source_file (name
);
834 /* Default the source language to whatever can be deduced from
835 the filename. If nothing can be deduced (such as for a C/C++
836 include file with a ".h" extension), then inherit whatever
837 language the previous subfile had. This kludgery is
838 necessary because there is no standard way in some object
839 formats to record the source language. Also, when symtabs
840 are allocated we try to deduce a language then as well, but
841 it is too late for us to use that information while reading
842 symbols, since symtabs aren't allocated until after all the
843 symbols have been processed for a given source file. */
845 subfile
->language
= deduce_language_from_filename (subfile
->name
);
846 if (subfile
->language
== language_unknown
847 && subfile
->next
!= NULL
)
849 subfile
->language
= subfile
->next
->language
;
854 /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for
855 switching source files (different subfiles, as we call them) within
856 one object file, but using a stack rather than in an arbitrary
862 struct subfile_stack
*tem
863 = (struct subfile_stack
*) xmalloc (sizeof (struct subfile_stack
));
865 tem
->next
= subfile_stack
;
867 if (current_subfile
== NULL
|| current_subfile
->name
== NULL
)
869 internal_error (__FILE__
, __LINE__
,
870 _("failed internal consistency check"));
872 tem
->name
= current_subfile
->name
;
879 struct subfile_stack
*link
= subfile_stack
;
883 internal_error (__FILE__
, __LINE__
,
884 _("failed internal consistency check"));
887 subfile_stack
= link
->next
;
888 xfree ((void *) link
);
892 /* Add a linetable entry for line number LINE and address PC to the
893 line vector for SUBFILE. */
896 record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
898 struct linetable_entry
*e
;
900 /* Ignore the dummy line number in libg.o */
906 /* Make sure line vector exists and is big enough. */
907 if (!subfile
->line_vector
)
909 subfile
->line_vector_length
= INITIAL_LINE_VECTOR_LENGTH
;
910 subfile
->line_vector
= (struct linetable
*)
911 xmalloc (sizeof (struct linetable
)
912 + subfile
->line_vector_length
* sizeof (struct linetable_entry
));
913 subfile
->line_vector
->nitems
= 0;
914 have_line_numbers
= 1;
917 if (subfile
->line_vector
->nitems
+ 1 >= subfile
->line_vector_length
)
919 subfile
->line_vector_length
*= 2;
920 subfile
->line_vector
= (struct linetable
*)
921 xrealloc ((char *) subfile
->line_vector
,
922 (sizeof (struct linetable
)
923 + (subfile
->line_vector_length
924 * sizeof (struct linetable_entry
))));
927 /* Normally, we treat lines as unsorted. But the end of sequence
928 marker is special. We sort line markers at the same PC by line
929 number, so end of sequence markers (which have line == 0) appear
930 first. This is right if the marker ends the previous function,
931 and there is no padding before the next function. But it is
932 wrong if the previous line was empty and we are now marking a
933 switch to a different subfile. We must leave the end of sequence
934 marker at the end of this group of lines, not sort the empty line
935 to after the marker. The easiest way to accomplish this is to
936 delete any empty lines from our table, if they are followed by
937 end of sequence markers. All we lose is the ability to set
938 breakpoints at some lines which contain no instructions
940 if (line
== 0 && subfile
->line_vector
->nitems
> 0)
942 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
- 1;
943 while (subfile
->line_vector
->nitems
> 0 && e
->pc
== pc
)
946 subfile
->line_vector
->nitems
--;
950 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
++;
955 /* Needed in order to sort line tables from IBM xcoff files. Sigh! */
958 compare_line_numbers (const void *ln1p
, const void *ln2p
)
960 struct linetable_entry
*ln1
= (struct linetable_entry
*) ln1p
;
961 struct linetable_entry
*ln2
= (struct linetable_entry
*) ln2p
;
963 /* Note: this code does not assume that CORE_ADDRs can fit in ints.
964 Please keep it that way. */
965 if (ln1
->pc
< ln2
->pc
)
968 if (ln1
->pc
> ln2
->pc
)
971 /* If pc equal, sort by line. I'm not sure whether this is optimum
972 behavior (see comment at struct linetable in symtab.h). */
973 return ln1
->line
- ln2
->line
;
976 /* See buildsym.h. */
978 struct compunit_symtab
*
979 buildsym_compunit_symtab (void)
981 gdb_assert (buildsym_compunit
!= NULL
);
983 return buildsym_compunit
->compunit_symtab
;
986 /* See buildsym.h. */
989 get_macro_table (void)
991 struct objfile
*objfile
;
993 gdb_assert (buildsym_compunit
!= NULL
);
995 objfile
= buildsym_compunit
->objfile
;
997 if (! pending_macros
)
999 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
1000 objfile
->per_bfd
->macro_cache
,
1001 buildsym_compunit
->compunit_symtab
);
1004 return pending_macros
;
1007 /* Init state to prepare for building a symtab.
1008 Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c
1009 can call start_symtab+end_symtab multiple times after one call to
1013 prepare_for_building (const char *name
, CORE_ADDR start_addr
)
1015 set_last_source_file (name
);
1016 last_source_start_addr
= start_addr
;
1018 local_symbols
= NULL
;
1019 local_using_directives
= NULL
;
1020 within_function
= 0;
1021 have_line_numbers
= 0;
1023 context_stack_depth
= 0;
1025 /* These should have been reset either by successful completion of building
1026 a symtab, or by the really_free_pendings cleanup. */
1027 gdb_assert (file_symbols
== NULL
);
1028 gdb_assert (global_symbols
== NULL
);
1029 gdb_assert (global_using_directives
== NULL
);
1030 gdb_assert (pending_macros
== NULL
);
1031 gdb_assert (pending_addrmap
== NULL
);
1032 gdb_assert (current_subfile
== NULL
);
1035 /* Start a new symtab for a new source file in OBJFILE. Called, for example,
1036 when a stabs symbol of type N_SO is seen, or when a DWARF
1037 TAG_compile_unit DIE is seen. It indicates the start of data for
1038 one original source file.
1040 NAME is the name of the file (cannot be NULL). COMP_DIR is the directory in
1041 which the file was compiled (or NULL if not known). START_ADDR is the
1042 lowest address of objects in the file (or 0 if not known). */
1044 struct compunit_symtab
*
1045 start_symtab (struct objfile
*objfile
, const char *name
, const char *comp_dir
,
1046 CORE_ADDR start_addr
)
1048 prepare_for_building (name
, start_addr
);
1050 buildsym_compunit
= start_buildsym_compunit (objfile
, comp_dir
);
1052 /* Allocate the compunit symtab now. The caller needs it to allocate
1053 non-primary symtabs. It is also needed by get_macro_table. */
1054 buildsym_compunit
->compunit_symtab
= allocate_compunit_symtab (objfile
,
1057 /* Build the subfile for NAME (the main source file) so that we can record
1058 a pointer to it for later.
1059 IMPORTANT: Do not allocate a struct symtab for NAME here.
1060 It can happen that the debug info provides a different path to NAME than
1061 DIRNAME,NAME. We cope with this in watch_main_source_file_lossage but
1062 that only works if the main_subfile doesn't have a symtab yet. */
1063 start_subfile (name
);
1064 /* Save this so that we don't have to go looking for it at the end
1065 of the subfiles list. */
1066 buildsym_compunit
->main_subfile
= current_subfile
;
1068 return buildsym_compunit
->compunit_symtab
;
1071 /* Restart compilation for a symtab.
1072 CUST is the result of end_expandable_symtab.
1073 NAME, START_ADDR are the source file we are resuming with.
1075 This is used when a symtab is built from multiple sources.
1076 The symtab is first built with start_symtab/end_expandable_symtab
1077 and then for each additional piece call restart_symtab/augment_*_symtab.
1078 Note: At the moment there is only augment_type_symtab. */
1081 restart_symtab (struct compunit_symtab
*cust
,
1082 const char *name
, CORE_ADDR start_addr
)
1084 prepare_for_building (name
, start_addr
);
1086 buildsym_compunit
= start_buildsym_compunit (COMPUNIT_OBJFILE (cust
),
1087 COMPUNIT_DIRNAME (cust
));
1088 buildsym_compunit
->compunit_symtab
= cust
;
1091 /* Subroutine of end_symtab to simplify it. Look for a subfile that
1092 matches the main source file's basename. If there is only one, and
1093 if the main source file doesn't have any symbol or line number
1094 information, then copy this file's symtab and line_vector to the
1095 main source file's subfile and discard the other subfile. This can
1096 happen because of a compiler bug or from the user playing games
1097 with #line or from things like a distributed build system that
1098 manipulates the debug info. This can also happen from an innocent
1099 symlink in the paths, we don't canonicalize paths here. */
1102 watch_main_source_file_lossage (void)
1104 struct subfile
*mainsub
, *subfile
;
1106 /* We have to watch for buildsym_compunit == NULL here. It's a quirk of
1107 end_symtab, it can return NULL so there may not be a main subfile. */
1108 if (buildsym_compunit
== NULL
)
1111 /* Get the main source file. */
1112 mainsub
= buildsym_compunit
->main_subfile
;
1114 /* If the main source file doesn't have any line number or symbol
1115 info, look for an alias in another subfile. */
1117 if (mainsub
->line_vector
== NULL
1118 && mainsub
->symtab
== NULL
)
1120 const char *mainbase
= lbasename (mainsub
->name
);
1122 struct subfile
*prevsub
;
1123 struct subfile
*mainsub_alias
= NULL
;
1124 struct subfile
*prev_mainsub_alias
= NULL
;
1127 for (subfile
= buildsym_compunit
->subfiles
;
1129 subfile
= subfile
->next
)
1131 if (subfile
== mainsub
)
1133 if (filename_cmp (lbasename (subfile
->name
), mainbase
) == 0)
1136 mainsub_alias
= subfile
;
1137 prev_mainsub_alias
= prevsub
;
1142 if (nr_matches
== 1)
1144 gdb_assert (mainsub_alias
!= NULL
&& mainsub_alias
!= mainsub
);
1146 /* Found a match for the main source file.
1147 Copy its line_vector and symtab to the main subfile
1148 and then discard it. */
1150 mainsub
->line_vector
= mainsub_alias
->line_vector
;
1151 mainsub
->line_vector_length
= mainsub_alias
->line_vector_length
;
1152 mainsub
->symtab
= mainsub_alias
->symtab
;
1154 if (prev_mainsub_alias
== NULL
)
1155 buildsym_compunit
->subfiles
= mainsub_alias
->next
;
1157 prev_mainsub_alias
->next
= mainsub_alias
->next
;
1158 xfree (mainsub_alias
->name
);
1159 xfree (mainsub_alias
);
1164 /* Helper function for qsort. Parameters are `struct block *' pointers,
1165 function sorts them in descending order by their BLOCK_START. */
1168 block_compar (const void *ap
, const void *bp
)
1170 const struct block
*a
= *(const struct block
**) ap
;
1171 const struct block
*b
= *(const struct block
**) bp
;
1173 return ((BLOCK_START (b
) > BLOCK_START (a
))
1174 - (BLOCK_START (b
) < BLOCK_START (a
)));
1177 /* Reset state after a successful building of a symtab.
1178 This exists because dbxread.c and xcoffread.c can call
1179 start_symtab+end_symtab multiple times after one call to buildsym_init,
1180 and before the really_free_pendings cleanup is called.
1181 We keep the free_pendings list around for dbx/xcoff sake. */
1184 reset_symtab_globals (void)
1186 set_last_source_file (NULL
);
1188 local_symbols
= NULL
;
1189 local_using_directives
= NULL
;
1190 file_symbols
= NULL
;
1191 global_symbols
= NULL
;
1192 global_using_directives
= NULL
;
1194 /* We don't free pending_macros here because if the symtab was successfully
1195 built then ownership was transferred to the symtab. */
1196 pending_macros
= NULL
;
1198 if (pending_addrmap
)
1199 obstack_free (&pending_addrmap_obstack
, NULL
);
1200 pending_addrmap
= NULL
;
1202 free_buildsym_compunit ();
1205 /* Implementation of the first part of end_symtab. It allows modifying
1206 STATIC_BLOCK before it gets finalized by end_symtab_from_static_block.
1207 If the returned value is NULL there is no blockvector created for
1208 this symtab (you still must call end_symtab_from_static_block).
1210 END_ADDR is the same as for end_symtab: the address of the end of the
1213 If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made
1216 If REQUIRED is non-zero, then a symtab is created even if it does
1217 not contain any symbols. */
1220 end_symtab_get_static_block (CORE_ADDR end_addr
, int expandable
, int required
)
1222 struct objfile
*objfile
= buildsym_compunit
->objfile
;
1224 /* Finish the lexical context of the last function in the file; pop
1225 the context stack. */
1227 if (context_stack_depth
> 0)
1229 struct context_stack
*cstk
= pop_context ();
1231 /* Make a block for the local symbols within. */
1232 finish_block (cstk
->name
, &local_symbols
, cstk
->old_blocks
,
1233 cstk
->start_addr
, end_addr
);
1235 if (context_stack_depth
> 0)
1237 /* This is said to happen with SCO. The old coffread.c
1238 code simply emptied the context stack, so we do the
1239 same. FIXME: Find out why it is happening. This is not
1240 believed to happen in most cases (even for coffread.c);
1241 it used to be an abort(). */
1242 complaint (&symfile_complaints
,
1243 _("Context stack not empty in end_symtab"));
1244 context_stack_depth
= 0;
1248 /* Reordered executables may have out of order pending blocks; if
1249 OBJF_REORDERED is true, then sort the pending blocks. */
1251 if ((objfile
->flags
& OBJF_REORDERED
) && pending_blocks
)
1254 struct pending_block
*pb
;
1255 struct block
**barray
, **bp
;
1256 struct cleanup
*back_to
;
1258 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1261 barray
= xmalloc (sizeof (*barray
) * count
);
1262 back_to
= make_cleanup (xfree
, barray
);
1265 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1268 qsort (barray
, count
, sizeof (*barray
), block_compar
);
1271 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1274 do_cleanups (back_to
);
1277 /* Cleanup any undefined types that have been left hanging around
1278 (this needs to be done before the finish_blocks so that
1279 file_symbols is still good).
1281 Both cleanup_undefined_stabs_types and finish_global_stabs are stabs
1282 specific, but harmless for other symbol readers, since on gdb
1283 startup or when finished reading stabs, the state is set so these
1284 are no-ops. FIXME: Is this handled right in case of QUIT? Can
1285 we make this cleaner? */
1287 cleanup_undefined_stabs_types (objfile
);
1288 finish_global_stabs (objfile
);
1291 && pending_blocks
== NULL
1292 && file_symbols
== NULL
1293 && global_symbols
== NULL
1294 && have_line_numbers
== 0
1295 && pending_macros
== NULL
1296 && global_using_directives
== NULL
)
1298 /* Ignore symtabs that have no functions with real debugging info. */
1303 /* Define the STATIC_BLOCK. */
1304 return finish_block_internal (NULL
, &file_symbols
, NULL
,
1305 last_source_start_addr
, end_addr
,
1310 /* Subroutine of end_symtab_from_static_block to simplify it.
1311 Handle the "have blockvector" case.
1312 See end_symtab_from_static_block for a description of the arguments. */
1314 static struct compunit_symtab
*
1315 end_symtab_with_blockvector (struct block
*static_block
,
1316 int section
, int expandable
)
1318 struct objfile
*objfile
= buildsym_compunit
->objfile
;
1319 struct compunit_symtab
*cu
= buildsym_compunit
->compunit_symtab
;
1320 struct symtab
*symtab
;
1321 struct blockvector
*blockvector
;
1322 struct subfile
*subfile
;
1325 gdb_assert (static_block
!= NULL
);
1326 gdb_assert (buildsym_compunit
!= NULL
);
1327 gdb_assert (buildsym_compunit
->subfiles
!= NULL
);
1329 end_addr
= BLOCK_END (static_block
);
1331 /* Create the GLOBAL_BLOCK and build the blockvector. */
1332 finish_block_internal (NULL
, &global_symbols
, NULL
,
1333 last_source_start_addr
, end_addr
,
1335 blockvector
= make_blockvector ();
1337 /* Read the line table if it has to be read separately.
1338 This is only used by xcoffread.c. */
1339 if (objfile
->sf
->sym_read_linetable
!= NULL
)
1340 objfile
->sf
->sym_read_linetable (objfile
);
1342 /* Handle the case where the debug info specifies a different path
1343 for the main source file. It can cause us to lose track of its
1344 line number information. */
1345 watch_main_source_file_lossage ();
1347 /* Now create the symtab objects proper, if not already done,
1348 one for each subfile. */
1350 for (subfile
= buildsym_compunit
->subfiles
;
1352 subfile
= subfile
->next
)
1354 int linetablesize
= 0;
1356 if (subfile
->line_vector
)
1358 linetablesize
= sizeof (struct linetable
) +
1359 subfile
->line_vector
->nitems
* sizeof (struct linetable_entry
);
1361 /* Like the pending blocks, the line table may be
1362 scrambled in reordered executables. Sort it if
1363 OBJF_REORDERED is true. */
1364 if (objfile
->flags
& OBJF_REORDERED
)
1365 qsort (subfile
->line_vector
->item
,
1366 subfile
->line_vector
->nitems
,
1367 sizeof (struct linetable_entry
), compare_line_numbers
);
1370 /* Allocate a symbol table if necessary. */
1371 if (subfile
->symtab
== NULL
)
1372 subfile
->symtab
= allocate_symtab (cu
, subfile
->name
);
1373 symtab
= subfile
->symtab
;
1375 /* Fill in its components. */
1377 if (subfile
->line_vector
)
1379 /* Reallocate the line table on the symbol obstack. */
1380 SYMTAB_LINETABLE (symtab
) = (struct linetable
*)
1381 obstack_alloc (&objfile
->objfile_obstack
, linetablesize
);
1382 memcpy (SYMTAB_LINETABLE (symtab
), subfile
->line_vector
,
1387 SYMTAB_LINETABLE (symtab
) = NULL
;
1390 /* Use whatever language we have been using for this
1391 subfile, not the one that was deduced in allocate_symtab
1392 from the filename. We already did our own deducing when
1393 we created the subfile, and we may have altered our
1394 opinion of what language it is from things we found in
1396 symtab
->language
= subfile
->language
;
1399 /* Make sure the symtab of main_subfile is the first in its list. */
1401 struct symtab
*main_symtab
, *prev_symtab
;
1403 main_symtab
= buildsym_compunit
->main_subfile
->symtab
;
1405 ALL_COMPUNIT_FILETABS (cu
, symtab
)
1407 if (symtab
== main_symtab
)
1409 if (prev_symtab
!= NULL
)
1411 prev_symtab
->next
= main_symtab
->next
;
1412 main_symtab
->next
= COMPUNIT_FILETABS (cu
);
1413 COMPUNIT_FILETABS (cu
) = main_symtab
;
1417 prev_symtab
= symtab
;
1419 gdb_assert (main_symtab
== COMPUNIT_FILETABS (cu
));
1422 /* Fill out the compunit symtab. */
1424 if (buildsym_compunit
->comp_dir
!= NULL
)
1426 /* Reallocate the dirname on the symbol obstack. */
1427 COMPUNIT_DIRNAME (cu
)
1428 = obstack_copy0 (&objfile
->objfile_obstack
,
1429 buildsym_compunit
->comp_dir
,
1430 strlen (buildsym_compunit
->comp_dir
));
1433 /* Save the debug format string (if any) in the symtab. */
1434 COMPUNIT_DEBUGFORMAT (cu
) = buildsym_compunit
->debugformat
;
1436 /* Similarly for the producer. */
1437 COMPUNIT_PRODUCER (cu
) = buildsym_compunit
->producer
;
1439 COMPUNIT_BLOCKVECTOR (cu
) = blockvector
;
1441 struct block
*b
= BLOCKVECTOR_BLOCK (blockvector
, GLOBAL_BLOCK
);
1443 set_block_compunit_symtab (b
, cu
);
1446 COMPUNIT_BLOCK_LINE_SECTION (cu
) = section
;
1448 COMPUNIT_MACRO_TABLE (cu
) = pending_macros
;
1450 /* Default any symbols without a specified symtab to the primary symtab. */
1454 /* The main source file's symtab. */
1455 symtab
= COMPUNIT_FILETABS (cu
);
1457 for (block_i
= 0; block_i
< BLOCKVECTOR_NBLOCKS (blockvector
); block_i
++)
1459 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, block_i
);
1461 struct dict_iterator iter
;
1463 /* Inlined functions may have symbols not in the global or
1464 static symbol lists. */
1465 if (BLOCK_FUNCTION (block
) != NULL
)
1466 if (symbol_symtab (BLOCK_FUNCTION (block
)) == NULL
)
1467 symbol_set_symtab (BLOCK_FUNCTION (block
), symtab
);
1469 /* Note that we only want to fix up symbols from the local
1470 blocks, not blocks coming from included symtabs. That is why
1471 we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */
1472 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
1473 if (symbol_symtab (sym
) == NULL
)
1474 symbol_set_symtab (sym
, symtab
);
1478 add_compunit_symtab_to_objfile (cu
);
1483 /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK
1484 as value returned by end_symtab_get_static_block.
1486 SECTION is the same as for end_symtab: the section number
1487 (in objfile->section_offsets) of the blockvector and linetable.
1489 If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made
1492 struct compunit_symtab
*
1493 end_symtab_from_static_block (struct block
*static_block
,
1494 int section
, int expandable
)
1496 struct compunit_symtab
*cu
;
1498 if (static_block
== NULL
)
1500 /* Handle the "no blockvector" case.
1501 When this happens there is nothing to record, so there's nothing
1502 to do: memory will be freed up later.
1504 Note: We won't be adding a compunit to the objfile's list of
1505 compunits, so there's nothing to unchain. However, since each symtab
1506 is added to the objfile's obstack we can't free that space.
1507 We could do better, but this is believed to be a sufficiently rare
1512 cu
= end_symtab_with_blockvector (static_block
, section
, expandable
);
1514 reset_symtab_globals ();
1519 /* Finish the symbol definitions for one main source file, close off
1520 all the lexical contexts for that file (creating struct block's for
1521 them), then make the struct symtab for that file and put it in the
1524 END_ADDR is the address of the end of the file's text. SECTION is
1525 the section number (in objfile->section_offsets) of the blockvector
1528 Note that it is possible for end_symtab() to return NULL. In
1529 particular, for the DWARF case at least, it will return NULL when
1530 it finds a compilation unit that has exactly one DIE, a
1531 TAG_compile_unit DIE. This can happen when we link in an object
1532 file that was compiled from an empty source file. Returning NULL
1533 is probably not the correct thing to do, because then gdb will
1534 never know about this empty file (FIXME).
1536 If you need to modify STATIC_BLOCK before it is finalized you should
1537 call end_symtab_get_static_block and end_symtab_from_static_block
1540 struct compunit_symtab
*
1541 end_symtab (CORE_ADDR end_addr
, int section
)
1543 struct block
*static_block
;
1545 static_block
= end_symtab_get_static_block (end_addr
, 0, 0);
1546 return end_symtab_from_static_block (static_block
, section
, 0);
1549 /* Same as end_symtab except create a symtab that can be later added to. */
1551 struct compunit_symtab
*
1552 end_expandable_symtab (CORE_ADDR end_addr
, int section
)
1554 struct block
*static_block
;
1556 static_block
= end_symtab_get_static_block (end_addr
, 1, 0);
1557 return end_symtab_from_static_block (static_block
, section
, 1);
1560 /* Subroutine of augment_type_symtab to simplify it.
1561 Attach the main source file's symtab to all symbols in PENDING_LIST that
1565 set_missing_symtab (struct pending
*pending_list
,
1566 struct compunit_symtab
*cu
)
1568 struct pending
*pending
;
1571 for (pending
= pending_list
; pending
!= NULL
; pending
= pending
->next
)
1573 for (i
= 0; i
< pending
->nsyms
; ++i
)
1575 if (symbol_symtab (pending
->symbol
[i
]) == NULL
)
1576 symbol_set_symtab (pending
->symbol
[i
], COMPUNIT_FILETABS (cu
));
1581 /* Same as end_symtab, but for the case where we're adding more symbols
1582 to an existing symtab that is known to contain only type information.
1583 This is the case for DWARF4 Type Units. */
1586 augment_type_symtab (void)
1588 struct compunit_symtab
*cust
= buildsym_compunit
->compunit_symtab
;
1589 const struct blockvector
*blockvector
= COMPUNIT_BLOCKVECTOR (cust
);
1591 if (context_stack_depth
> 0)
1593 complaint (&symfile_complaints
,
1594 _("Context stack not empty in augment_type_symtab"));
1595 context_stack_depth
= 0;
1597 if (pending_blocks
!= NULL
)
1598 complaint (&symfile_complaints
, _("Blocks in a type symtab"));
1599 if (pending_macros
!= NULL
)
1600 complaint (&symfile_complaints
, _("Macro in a type symtab"));
1601 if (have_line_numbers
)
1602 complaint (&symfile_complaints
,
1603 _("Line numbers recorded in a type symtab"));
1605 if (file_symbols
!= NULL
)
1607 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, STATIC_BLOCK
);
1609 /* First mark any symbols without a specified symtab as belonging
1610 to the primary symtab. */
1611 set_missing_symtab (file_symbols
, cust
);
1613 dict_add_pending (BLOCK_DICT (block
), file_symbols
);
1616 if (global_symbols
!= NULL
)
1618 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, GLOBAL_BLOCK
);
1620 /* First mark any symbols without a specified symtab as belonging
1621 to the primary symtab. */
1622 set_missing_symtab (global_symbols
, cust
);
1624 dict_add_pending (BLOCK_DICT (block
), global_symbols
);
1627 reset_symtab_globals ();
1630 /* Push a context block. Args are an identifying nesting level
1631 (checkable when you pop it), and the starting PC address of this
1634 struct context_stack
*
1635 push_context (int desc
, CORE_ADDR valu
)
1637 struct context_stack
*newobj
;
1639 if (context_stack_depth
== context_stack_size
)
1641 context_stack_size
*= 2;
1642 context_stack
= (struct context_stack
*)
1643 xrealloc ((char *) context_stack
,
1644 (context_stack_size
* sizeof (struct context_stack
)));
1647 newobj
= &context_stack
[context_stack_depth
++];
1648 newobj
->depth
= desc
;
1649 newobj
->locals
= local_symbols
;
1650 newobj
->old_blocks
= pending_blocks
;
1651 newobj
->start_addr
= valu
;
1652 newobj
->local_using_directives
= local_using_directives
;
1653 newobj
->name
= NULL
;
1655 local_symbols
= NULL
;
1656 local_using_directives
= NULL
;
1661 /* Pop a context block. Returns the address of the context block just
1664 struct context_stack
*
1667 gdb_assert (context_stack_depth
> 0);
1668 return (&context_stack
[--context_stack_depth
]);
1673 /* Compute a small integer hash code for the given name. */
1676 hashname (const char *name
)
1678 return (hash(name
,strlen(name
)) % HASHSIZE
);
1683 record_debugformat (const char *format
)
1685 buildsym_compunit
->debugformat
= format
;
1689 record_producer (const char *producer
)
1691 buildsym_compunit
->producer
= producer
;
1694 /* Merge the first symbol list SRCLIST into the second symbol list
1695 TARGETLIST by repeated calls to add_symbol_to_list(). This
1696 procedure "frees" each link of SRCLIST by adding it to the
1697 free_pendings list. Caller must set SRCLIST to a null list after
1698 calling this function.
1703 merge_symbol_lists (struct pending
**srclist
, struct pending
**targetlist
)
1707 if (!srclist
|| !*srclist
)
1710 /* Merge in elements from current link. */
1711 for (i
= 0; i
< (*srclist
)->nsyms
; i
++)
1712 add_symbol_to_list ((*srclist
)->symbol
[i
], targetlist
);
1714 /* Recurse on next. */
1715 merge_symbol_lists (&(*srclist
)->next
, targetlist
);
1717 /* "Free" the current link. */
1718 (*srclist
)->next
= free_pendings
;
1719 free_pendings
= (*srclist
);
1723 /* Name of source file whose symbol data we are now processing. This
1724 comes from a symbol of type N_SO for stabs. For Dwarf it comes
1725 from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */
1727 static char *last_source_file
;
1729 /* See buildsym.h. */
1732 set_last_source_file (const char *name
)
1734 xfree (last_source_file
);
1735 last_source_file
= name
== NULL
? NULL
: xstrdup (name
);
1738 /* See buildsym.h. */
1741 get_last_source_file (void)
1743 return last_source_file
;
1748 /* Initialize anything that needs initializing when starting to read a
1749 fresh piece of a symbol file, e.g. reading in the stuff
1750 corresponding to a psymtab. */
1753 buildsym_init (void)
1755 subfile_stack
= NULL
;
1757 pending_addrmap_interesting
= 0;
1759 /* Context stack is initially empty. Allocate first one with room
1760 for a few levels; reuse it forever afterward. */
1761 if (context_stack
== NULL
)
1763 context_stack_size
= INITIAL_CONTEXT_STACK_SIZE
;
1764 context_stack
= (struct context_stack
*)
1765 xmalloc (context_stack_size
* sizeof (struct context_stack
));
1768 /* Ensure the really_free_pendings cleanup was called after
1770 gdb_assert (free_pendings
== NULL
);
1771 gdb_assert (pending_blocks
== NULL
);
1772 gdb_assert (file_symbols
== NULL
);
1773 gdb_assert (global_symbols
== NULL
);
1774 gdb_assert (global_using_directives
== NULL
);
1775 gdb_assert (pending_macros
== NULL
);
1776 gdb_assert (pending_addrmap
== NULL
);
1777 gdb_assert (buildsym_compunit
== NULL
);
1780 /* Initialize anything that needs initializing when a completely new
1781 symbol file is specified (not just adding some symbols from another
1782 file, e.g. a shared library). */
1785 buildsym_new_init (void)