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
,
335 struct pending
**listhead
,
336 struct pending_block
*old_blocks
,
337 const struct dynamic_prop
*static_link
,
338 CORE_ADDR start
, CORE_ADDR end
,
339 int is_global
, int expandable
)
341 struct objfile
*objfile
= buildsym_compunit
->objfile
;
342 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
343 struct pending
*next
, *next1
;
345 struct pending_block
*pblock
;
346 struct pending_block
*opblock
;
349 ? allocate_global_block (&objfile
->objfile_obstack
)
350 : allocate_block (&objfile
->objfile_obstack
));
354 BLOCK_DICT (block
) = dict_create_linear (&objfile
->objfile_obstack
,
361 BLOCK_DICT (block
) = dict_create_hashed_expandable ();
362 dict_add_pending (BLOCK_DICT (block
), *listhead
);
367 dict_create_hashed (&objfile
->objfile_obstack
, *listhead
);
371 BLOCK_START (block
) = start
;
372 BLOCK_END (block
) = end
;
374 /* Put the block in as the value of the symbol that names it. */
378 struct type
*ftype
= SYMBOL_TYPE (symbol
);
379 struct dict_iterator iter
;
380 SYMBOL_BLOCK_VALUE (symbol
) = block
;
381 BLOCK_FUNCTION (block
) = symbol
;
383 if (TYPE_NFIELDS (ftype
) <= 0)
385 /* No parameter type information is recorded with the
386 function's type. Set that from the type of the
387 parameter symbols. */
388 int nparams
= 0, iparams
;
391 /* Here we want to directly access the dictionary, because
392 we haven't fully initialized the block yet. */
393 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
395 if (SYMBOL_IS_ARGUMENT (sym
))
400 TYPE_NFIELDS (ftype
) = nparams
;
401 TYPE_FIELDS (ftype
) = (struct field
*)
402 TYPE_ALLOC (ftype
, nparams
* sizeof (struct field
));
405 /* Here we want to directly access the dictionary, because
406 we haven't fully initialized the block yet. */
407 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
409 if (iparams
== nparams
)
412 if (SYMBOL_IS_ARGUMENT (sym
))
414 TYPE_FIELD_TYPE (ftype
, iparams
) = SYMBOL_TYPE (sym
);
415 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
424 BLOCK_FUNCTION (block
) = NULL
;
427 if (static_link
!= NULL
)
428 objfile_register_static_link (objfile
, block
, static_link
);
430 /* Now "free" the links of the list, and empty the list. */
432 for (next
= *listhead
; next
; next
= next1
)
435 next
->next
= free_pendings
;
436 free_pendings
= next
;
440 /* Check to be sure that the blocks have an end address that is
441 greater than starting address. */
443 if (BLOCK_END (block
) < BLOCK_START (block
))
447 complaint (&symfile_complaints
,
448 _("block end address less than block "
449 "start address in %s (patched it)"),
450 SYMBOL_PRINT_NAME (symbol
));
454 complaint (&symfile_complaints
,
455 _("block end address %s less than block "
456 "start address %s (patched it)"),
457 paddress (gdbarch
, BLOCK_END (block
)),
458 paddress (gdbarch
, BLOCK_START (block
)));
460 /* Better than nothing. */
461 BLOCK_END (block
) = BLOCK_START (block
);
464 /* Install this block as the superblock of all blocks made since the
465 start of this scope that don't have superblocks yet. */
468 for (pblock
= pending_blocks
;
469 pblock
&& pblock
!= old_blocks
;
470 pblock
= pblock
->next
)
472 if (BLOCK_SUPERBLOCK (pblock
->block
) == NULL
)
474 /* Check to be sure the blocks are nested as we receive
475 them. If the compiler/assembler/linker work, this just
476 burns a small amount of time.
478 Skip blocks which correspond to a function; they're not
479 physically nested inside this other blocks, only
481 if (BLOCK_FUNCTION (pblock
->block
) == NULL
482 && (BLOCK_START (pblock
->block
) < BLOCK_START (block
)
483 || BLOCK_END (pblock
->block
) > BLOCK_END (block
)))
487 complaint (&symfile_complaints
,
488 _("inner block not inside outer block in %s"),
489 SYMBOL_PRINT_NAME (symbol
));
493 complaint (&symfile_complaints
,
494 _("inner block (%s-%s) not "
495 "inside outer block (%s-%s)"),
496 paddress (gdbarch
, BLOCK_START (pblock
->block
)),
497 paddress (gdbarch
, BLOCK_END (pblock
->block
)),
498 paddress (gdbarch
, BLOCK_START (block
)),
499 paddress (gdbarch
, BLOCK_END (block
)));
501 if (BLOCK_START (pblock
->block
) < BLOCK_START (block
))
502 BLOCK_START (pblock
->block
) = BLOCK_START (block
);
503 if (BLOCK_END (pblock
->block
) > BLOCK_END (block
))
504 BLOCK_END (pblock
->block
) = BLOCK_END (block
);
506 BLOCK_SUPERBLOCK (pblock
->block
) = block
;
511 block_set_using (block
,
513 ? global_using_directives
514 : local_using_directives
),
515 &objfile
->objfile_obstack
);
517 global_using_directives
= NULL
;
519 local_using_directives
= NULL
;
521 record_pending_block (objfile
, block
, opblock
);
527 finish_block (struct symbol
*symbol
,
528 struct pending
**listhead
,
529 struct pending_block
*old_blocks
,
530 const struct dynamic_prop
*static_link
,
531 CORE_ADDR start
, CORE_ADDR end
)
533 return finish_block_internal (symbol
, listhead
, old_blocks
, static_link
,
537 /* Record BLOCK on the list of all blocks in the file. Put it after
538 OPBLOCK, or at the beginning if opblock is NULL. This puts the
539 block in the list after all its subblocks.
541 Allocate the pending block struct in the objfile_obstack to save
542 time. This wastes a little space. FIXME: Is it worth it? */
545 record_pending_block (struct objfile
*objfile
, struct block
*block
,
546 struct pending_block
*opblock
)
548 struct pending_block
*pblock
;
550 if (pending_blocks
== NULL
)
551 obstack_init (&pending_block_obstack
);
553 pblock
= (struct pending_block
*)
554 obstack_alloc (&pending_block_obstack
, sizeof (struct pending_block
));
555 pblock
->block
= block
;
558 pblock
->next
= opblock
->next
;
559 opblock
->next
= pblock
;
563 pblock
->next
= pending_blocks
;
564 pending_blocks
= pblock
;
569 /* Record that the range of addresses from START to END_INCLUSIVE
570 (inclusive, like it says) belongs to BLOCK. BLOCK's start and end
571 addresses must be set already. You must apply this function to all
572 BLOCK's children before applying it to BLOCK.
574 If a call to this function complicates the picture beyond that
575 already provided by BLOCK_START and BLOCK_END, then we create an
576 address map for the block. */
578 record_block_range (struct block
*block
,
579 CORE_ADDR start
, CORE_ADDR end_inclusive
)
581 /* If this is any different from the range recorded in the block's
582 own BLOCK_START and BLOCK_END, then note that the address map has
583 become interesting. Note that even if this block doesn't have
584 any "interesting" ranges, some later block might, so we still
585 need to record this block in the addrmap. */
586 if (start
!= BLOCK_START (block
)
587 || end_inclusive
+ 1 != BLOCK_END (block
))
588 pending_addrmap_interesting
= 1;
590 if (! pending_addrmap
)
592 obstack_init (&pending_addrmap_obstack
);
593 pending_addrmap
= addrmap_create_mutable (&pending_addrmap_obstack
);
596 addrmap_set_empty (pending_addrmap
, start
, end_inclusive
, block
);
599 static struct blockvector
*
600 make_blockvector (void)
602 struct objfile
*objfile
= buildsym_compunit
->objfile
;
603 struct pending_block
*next
;
604 struct blockvector
*blockvector
;
607 /* Count the length of the list of blocks. */
609 for (next
= pending_blocks
, i
= 0; next
; next
= next
->next
, i
++)
613 blockvector
= (struct blockvector
*)
614 obstack_alloc (&objfile
->objfile_obstack
,
615 (sizeof (struct blockvector
)
616 + (i
- 1) * sizeof (struct block
*)));
618 /* Copy the blocks into the blockvector. This is done in reverse
619 order, which happens to put the blocks into the proper order
620 (ascending starting address). finish_block has hair to insert
621 each block into the list after its subblocks in order to make
622 sure this is true. */
624 BLOCKVECTOR_NBLOCKS (blockvector
) = i
;
625 for (next
= pending_blocks
; next
; next
= next
->next
)
627 BLOCKVECTOR_BLOCK (blockvector
, --i
) = next
->block
;
630 free_pending_blocks ();
632 /* If we needed an address map for this symtab, record it in the
634 if (pending_addrmap
&& pending_addrmap_interesting
)
635 BLOCKVECTOR_MAP (blockvector
)
636 = addrmap_create_fixed (pending_addrmap
, &objfile
->objfile_obstack
);
638 BLOCKVECTOR_MAP (blockvector
) = 0;
640 /* Some compilers output blocks in the wrong order, but we depend on
641 their being in the right order so we can binary search. Check the
642 order and moan about it.
643 Note: Remember that the first two blocks are the global and static
644 blocks. We could special case that fact and begin checking at block 2.
645 To avoid making that assumption we do not. */
646 if (BLOCKVECTOR_NBLOCKS (blockvector
) > 1)
648 for (i
= 1; i
< BLOCKVECTOR_NBLOCKS (blockvector
); i
++)
650 if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
- 1))
651 > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
)))
654 = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
));
656 complaint (&symfile_complaints
, _("block at %s out of order"),
657 hex_string ((LONGEST
) start
));
662 return (blockvector
);
665 /* Start recording information about source code that came from an
666 included (or otherwise merged-in) source file with a different
667 name. NAME is the name of the file (cannot be NULL). */
670 start_subfile (const char *name
)
672 const char *subfile_dirname
;
673 struct subfile
*subfile
;
675 gdb_assert (buildsym_compunit
!= NULL
);
677 subfile_dirname
= buildsym_compunit
->comp_dir
;
679 /* See if this subfile is already registered. */
681 for (subfile
= buildsym_compunit
->subfiles
; subfile
; subfile
= subfile
->next
)
685 /* If NAME is an absolute path, and this subfile is not, then
686 attempt to create an absolute path to compare. */
687 if (IS_ABSOLUTE_PATH (name
)
688 && !IS_ABSOLUTE_PATH (subfile
->name
)
689 && subfile_dirname
!= NULL
)
690 subfile_name
= concat (subfile_dirname
, SLASH_STRING
,
691 subfile
->name
, (char *) NULL
);
693 subfile_name
= subfile
->name
;
695 if (FILENAME_CMP (subfile_name
, name
) == 0)
697 current_subfile
= subfile
;
698 if (subfile_name
!= subfile
->name
)
699 xfree (subfile_name
);
702 if (subfile_name
!= subfile
->name
)
703 xfree (subfile_name
);
706 /* This subfile is not known. Add an entry for it. */
708 subfile
= (struct subfile
*) xmalloc (sizeof (struct subfile
));
709 memset (subfile
, 0, sizeof (struct subfile
));
710 subfile
->buildsym_compunit
= buildsym_compunit
;
712 subfile
->next
= buildsym_compunit
->subfiles
;
713 buildsym_compunit
->subfiles
= subfile
;
715 current_subfile
= subfile
;
717 subfile
->name
= xstrdup (name
);
719 /* Initialize line-number recording for this subfile. */
720 subfile
->line_vector
= NULL
;
722 /* Default the source language to whatever can be deduced from the
723 filename. If nothing can be deduced (such as for a C/C++ include
724 file with a ".h" extension), then inherit whatever language the
725 previous subfile had. This kludgery is necessary because there
726 is no standard way in some object formats to record the source
727 language. Also, when symtabs are allocated we try to deduce a
728 language then as well, but it is too late for us to use that
729 information while reading symbols, since symtabs aren't allocated
730 until after all the symbols have been processed for a given
733 subfile
->language
= deduce_language_from_filename (subfile
->name
);
734 if (subfile
->language
== language_unknown
735 && subfile
->next
!= NULL
)
737 subfile
->language
= subfile
->next
->language
;
740 /* If the filename of this subfile ends in .C, then change the
741 language of any pending subfiles from C to C++. We also accept
742 any other C++ suffixes accepted by deduce_language_from_filename. */
743 /* Likewise for f2c. */
748 enum language sublang
= deduce_language_from_filename (subfile
->name
);
750 if (sublang
== language_cplus
|| sublang
== language_fortran
)
751 for (s
= buildsym_compunit
->subfiles
; s
!= NULL
; s
= s
->next
)
752 if (s
->language
== language_c
)
753 s
->language
= sublang
;
756 /* And patch up this file if necessary. */
757 if (subfile
->language
== language_c
758 && subfile
->next
!= NULL
759 && (subfile
->next
->language
== language_cplus
760 || subfile
->next
->language
== language_fortran
))
762 subfile
->language
= subfile
->next
->language
;
766 /* Start recording information about a primary source file (IOW, not an
767 included source file).
768 COMP_DIR is the directory in which the compilation unit was compiled
769 (or NULL if not known). */
771 static struct buildsym_compunit
*
772 start_buildsym_compunit (struct objfile
*objfile
, const char *comp_dir
)
774 struct buildsym_compunit
*bscu
;
776 bscu
= (struct buildsym_compunit
*)
777 xmalloc (sizeof (struct buildsym_compunit
));
778 memset (bscu
, 0, sizeof (struct buildsym_compunit
));
780 bscu
->objfile
= objfile
;
781 bscu
->comp_dir
= (comp_dir
== NULL
) ? NULL
: xstrdup (comp_dir
);
783 /* Initialize the debug format string to NULL. We may supply it
784 later via a call to record_debugformat. */
785 bscu
->debugformat
= NULL
;
787 /* Similarly for the producer. */
788 bscu
->producer
= NULL
;
793 /* Delete the buildsym compunit. */
796 free_buildsym_compunit (void)
798 struct subfile
*subfile
, *nextsub
;
800 if (buildsym_compunit
== NULL
)
802 for (subfile
= buildsym_compunit
->subfiles
;
806 nextsub
= subfile
->next
;
807 xfree (subfile
->name
);
808 xfree (subfile
->line_vector
);
811 xfree (buildsym_compunit
->comp_dir
);
812 xfree (buildsym_compunit
);
813 buildsym_compunit
= NULL
;
814 current_subfile
= NULL
;
817 /* For stabs readers, the first N_SO symbol is assumed to be the
818 source file name, and the subfile struct is initialized using that
819 assumption. If another N_SO symbol is later seen, immediately
820 following the first one, then the first one is assumed to be the
821 directory name and the second one is really the source file name.
823 So we have to patch up the subfile struct by moving the old name
824 value to dirname and remembering the new name. Some sanity
825 checking is performed to ensure that the state of the subfile
826 struct is reasonable and that the old name we are assuming to be a
827 directory name actually is (by checking for a trailing '/'). */
830 patch_subfile_names (struct subfile
*subfile
, char *name
)
833 && buildsym_compunit
->comp_dir
== NULL
834 && subfile
->name
!= NULL
835 && IS_DIR_SEPARATOR (subfile
->name
[strlen (subfile
->name
) - 1]))
837 buildsym_compunit
->comp_dir
= subfile
->name
;
838 subfile
->name
= xstrdup (name
);
839 set_last_source_file (name
);
841 /* Default the source language to whatever can be deduced from
842 the filename. If nothing can be deduced (such as for a C/C++
843 include file with a ".h" extension), then inherit whatever
844 language the previous subfile had. This kludgery is
845 necessary because there is no standard way in some object
846 formats to record the source language. Also, when symtabs
847 are allocated we try to deduce a language then as well, but
848 it is too late for us to use that information while reading
849 symbols, since symtabs aren't allocated until after all the
850 symbols have been processed for a given source file. */
852 subfile
->language
= deduce_language_from_filename (subfile
->name
);
853 if (subfile
->language
== language_unknown
854 && subfile
->next
!= NULL
)
856 subfile
->language
= subfile
->next
->language
;
861 /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for
862 switching source files (different subfiles, as we call them) within
863 one object file, but using a stack rather than in an arbitrary
869 struct subfile_stack
*tem
870 = (struct subfile_stack
*) xmalloc (sizeof (struct subfile_stack
));
872 tem
->next
= subfile_stack
;
874 if (current_subfile
== NULL
|| current_subfile
->name
== NULL
)
876 internal_error (__FILE__
, __LINE__
,
877 _("failed internal consistency check"));
879 tem
->name
= current_subfile
->name
;
886 struct subfile_stack
*link
= subfile_stack
;
890 internal_error (__FILE__
, __LINE__
,
891 _("failed internal consistency check"));
894 subfile_stack
= link
->next
;
895 xfree ((void *) link
);
899 /* Add a linetable entry for line number LINE and address PC to the
900 line vector for SUBFILE. */
903 record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
905 struct linetable_entry
*e
;
907 /* Ignore the dummy line number in libg.o */
913 /* Make sure line vector exists and is big enough. */
914 if (!subfile
->line_vector
)
916 subfile
->line_vector_length
= INITIAL_LINE_VECTOR_LENGTH
;
917 subfile
->line_vector
= (struct linetable
*)
918 xmalloc (sizeof (struct linetable
)
919 + subfile
->line_vector_length
* sizeof (struct linetable_entry
));
920 subfile
->line_vector
->nitems
= 0;
921 have_line_numbers
= 1;
924 if (subfile
->line_vector
->nitems
+ 1 >= subfile
->line_vector_length
)
926 subfile
->line_vector_length
*= 2;
927 subfile
->line_vector
= (struct linetable
*)
928 xrealloc ((char *) subfile
->line_vector
,
929 (sizeof (struct linetable
)
930 + (subfile
->line_vector_length
931 * sizeof (struct linetable_entry
))));
934 /* Normally, we treat lines as unsorted. But the end of sequence
935 marker is special. We sort line markers at the same PC by line
936 number, so end of sequence markers (which have line == 0) appear
937 first. This is right if the marker ends the previous function,
938 and there is no padding before the next function. But it is
939 wrong if the previous line was empty and we are now marking a
940 switch to a different subfile. We must leave the end of sequence
941 marker at the end of this group of lines, not sort the empty line
942 to after the marker. The easiest way to accomplish this is to
943 delete any empty lines from our table, if they are followed by
944 end of sequence markers. All we lose is the ability to set
945 breakpoints at some lines which contain no instructions
947 if (line
== 0 && subfile
->line_vector
->nitems
> 0)
949 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
- 1;
950 while (subfile
->line_vector
->nitems
> 0 && e
->pc
== pc
)
953 subfile
->line_vector
->nitems
--;
957 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
++;
962 /* Needed in order to sort line tables from IBM xcoff files. Sigh! */
965 compare_line_numbers (const void *ln1p
, const void *ln2p
)
967 struct linetable_entry
*ln1
= (struct linetable_entry
*) ln1p
;
968 struct linetable_entry
*ln2
= (struct linetable_entry
*) ln2p
;
970 /* Note: this code does not assume that CORE_ADDRs can fit in ints.
971 Please keep it that way. */
972 if (ln1
->pc
< ln2
->pc
)
975 if (ln1
->pc
> ln2
->pc
)
978 /* If pc equal, sort by line. I'm not sure whether this is optimum
979 behavior (see comment at struct linetable in symtab.h). */
980 return ln1
->line
- ln2
->line
;
983 /* See buildsym.h. */
985 struct compunit_symtab
*
986 buildsym_compunit_symtab (void)
988 gdb_assert (buildsym_compunit
!= NULL
);
990 return buildsym_compunit
->compunit_symtab
;
993 /* See buildsym.h. */
996 get_macro_table (void)
998 struct objfile
*objfile
;
1000 gdb_assert (buildsym_compunit
!= NULL
);
1002 objfile
= buildsym_compunit
->objfile
;
1004 if (! pending_macros
)
1006 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
1007 objfile
->per_bfd
->macro_cache
,
1008 buildsym_compunit
->compunit_symtab
);
1011 return pending_macros
;
1014 /* Init state to prepare for building a symtab.
1015 Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c
1016 can call start_symtab+end_symtab multiple times after one call to
1020 prepare_for_building (const char *name
, CORE_ADDR start_addr
)
1022 set_last_source_file (name
);
1023 last_source_start_addr
= start_addr
;
1025 local_symbols
= NULL
;
1026 local_using_directives
= NULL
;
1027 within_function
= 0;
1028 have_line_numbers
= 0;
1030 context_stack_depth
= 0;
1032 /* These should have been reset either by successful completion of building
1033 a symtab, or by the really_free_pendings cleanup. */
1034 gdb_assert (file_symbols
== NULL
);
1035 gdb_assert (global_symbols
== NULL
);
1036 gdb_assert (global_using_directives
== NULL
);
1037 gdb_assert (pending_macros
== NULL
);
1038 gdb_assert (pending_addrmap
== NULL
);
1039 gdb_assert (current_subfile
== NULL
);
1042 /* Start a new symtab for a new source file in OBJFILE. Called, for example,
1043 when a stabs symbol of type N_SO is seen, or when a DWARF
1044 TAG_compile_unit DIE is seen. It indicates the start of data for
1045 one original source file.
1047 NAME is the name of the file (cannot be NULL). COMP_DIR is the directory in
1048 which the file was compiled (or NULL if not known). START_ADDR is the
1049 lowest address of objects in the file (or 0 if not known). */
1051 struct compunit_symtab
*
1052 start_symtab (struct objfile
*objfile
, const char *name
, const char *comp_dir
,
1053 CORE_ADDR start_addr
)
1055 prepare_for_building (name
, start_addr
);
1057 buildsym_compunit
= start_buildsym_compunit (objfile
, comp_dir
);
1059 /* Allocate the compunit symtab now. The caller needs it to allocate
1060 non-primary symtabs. It is also needed by get_macro_table. */
1061 buildsym_compunit
->compunit_symtab
= allocate_compunit_symtab (objfile
,
1064 /* Build the subfile for NAME (the main source file) so that we can record
1065 a pointer to it for later.
1066 IMPORTANT: Do not allocate a struct symtab for NAME here.
1067 It can happen that the debug info provides a different path to NAME than
1068 DIRNAME,NAME. We cope with this in watch_main_source_file_lossage but
1069 that only works if the main_subfile doesn't have a symtab yet. */
1070 start_subfile (name
);
1071 /* Save this so that we don't have to go looking for it at the end
1072 of the subfiles list. */
1073 buildsym_compunit
->main_subfile
= current_subfile
;
1075 return buildsym_compunit
->compunit_symtab
;
1078 /* Restart compilation for a symtab.
1079 CUST is the result of end_expandable_symtab.
1080 NAME, START_ADDR are the source file we are resuming with.
1082 This is used when a symtab is built from multiple sources.
1083 The symtab is first built with start_symtab/end_expandable_symtab
1084 and then for each additional piece call restart_symtab/augment_*_symtab.
1085 Note: At the moment there is only augment_type_symtab. */
1088 restart_symtab (struct compunit_symtab
*cust
,
1089 const char *name
, CORE_ADDR start_addr
)
1091 prepare_for_building (name
, start_addr
);
1093 buildsym_compunit
= start_buildsym_compunit (COMPUNIT_OBJFILE (cust
),
1094 COMPUNIT_DIRNAME (cust
));
1095 buildsym_compunit
->compunit_symtab
= cust
;
1098 /* Subroutine of end_symtab to simplify it. Look for a subfile that
1099 matches the main source file's basename. If there is only one, and
1100 if the main source file doesn't have any symbol or line number
1101 information, then copy this file's symtab and line_vector to the
1102 main source file's subfile and discard the other subfile. This can
1103 happen because of a compiler bug or from the user playing games
1104 with #line or from things like a distributed build system that
1105 manipulates the debug info. This can also happen from an innocent
1106 symlink in the paths, we don't canonicalize paths here. */
1109 watch_main_source_file_lossage (void)
1111 struct subfile
*mainsub
, *subfile
;
1113 /* We have to watch for buildsym_compunit == NULL here. It's a quirk of
1114 end_symtab, it can return NULL so there may not be a main subfile. */
1115 if (buildsym_compunit
== NULL
)
1118 /* Get the main source file. */
1119 mainsub
= buildsym_compunit
->main_subfile
;
1121 /* If the main source file doesn't have any line number or symbol
1122 info, look for an alias in another subfile. */
1124 if (mainsub
->line_vector
== NULL
1125 && mainsub
->symtab
== NULL
)
1127 const char *mainbase
= lbasename (mainsub
->name
);
1129 struct subfile
*prevsub
;
1130 struct subfile
*mainsub_alias
= NULL
;
1131 struct subfile
*prev_mainsub_alias
= NULL
;
1134 for (subfile
= buildsym_compunit
->subfiles
;
1136 subfile
= subfile
->next
)
1138 if (subfile
== mainsub
)
1140 if (filename_cmp (lbasename (subfile
->name
), mainbase
) == 0)
1143 mainsub_alias
= subfile
;
1144 prev_mainsub_alias
= prevsub
;
1149 if (nr_matches
== 1)
1151 gdb_assert (mainsub_alias
!= NULL
&& mainsub_alias
!= mainsub
);
1153 /* Found a match for the main source file.
1154 Copy its line_vector and symtab to the main subfile
1155 and then discard it. */
1157 mainsub
->line_vector
= mainsub_alias
->line_vector
;
1158 mainsub
->line_vector_length
= mainsub_alias
->line_vector_length
;
1159 mainsub
->symtab
= mainsub_alias
->symtab
;
1161 if (prev_mainsub_alias
== NULL
)
1162 buildsym_compunit
->subfiles
= mainsub_alias
->next
;
1164 prev_mainsub_alias
->next
= mainsub_alias
->next
;
1165 xfree (mainsub_alias
->name
);
1166 xfree (mainsub_alias
);
1171 /* Helper function for qsort. Parameters are `struct block *' pointers,
1172 function sorts them in descending order by their BLOCK_START. */
1175 block_compar (const void *ap
, const void *bp
)
1177 const struct block
*a
= *(const struct block
**) ap
;
1178 const struct block
*b
= *(const struct block
**) bp
;
1180 return ((BLOCK_START (b
) > BLOCK_START (a
))
1181 - (BLOCK_START (b
) < BLOCK_START (a
)));
1184 /* Reset state after a successful building of a symtab.
1185 This exists because dbxread.c and xcoffread.c can call
1186 start_symtab+end_symtab multiple times after one call to buildsym_init,
1187 and before the really_free_pendings cleanup is called.
1188 We keep the free_pendings list around for dbx/xcoff sake. */
1191 reset_symtab_globals (void)
1193 set_last_source_file (NULL
);
1195 local_symbols
= NULL
;
1196 local_using_directives
= NULL
;
1197 file_symbols
= NULL
;
1198 global_symbols
= NULL
;
1199 global_using_directives
= NULL
;
1201 /* We don't free pending_macros here because if the symtab was successfully
1202 built then ownership was transferred to the symtab. */
1203 pending_macros
= NULL
;
1205 if (pending_addrmap
)
1206 obstack_free (&pending_addrmap_obstack
, NULL
);
1207 pending_addrmap
= NULL
;
1209 free_buildsym_compunit ();
1212 /* Implementation of the first part of end_symtab. It allows modifying
1213 STATIC_BLOCK before it gets finalized by end_symtab_from_static_block.
1214 If the returned value is NULL there is no blockvector created for
1215 this symtab (you still must call end_symtab_from_static_block).
1217 END_ADDR is the same as for end_symtab: the address of the end of the
1220 If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made
1223 If REQUIRED is non-zero, then a symtab is created even if it does
1224 not contain any symbols. */
1227 end_symtab_get_static_block (CORE_ADDR end_addr
, int expandable
, int required
)
1229 struct objfile
*objfile
= buildsym_compunit
->objfile
;
1231 /* Finish the lexical context of the last function in the file; pop
1232 the context stack. */
1234 if (context_stack_depth
> 0)
1236 struct context_stack
*cstk
= pop_context ();
1238 /* Make a block for the local symbols within. */
1239 finish_block (cstk
->name
, &local_symbols
, cstk
->old_blocks
, NULL
,
1240 cstk
->start_addr
, end_addr
);
1242 if (context_stack_depth
> 0)
1244 /* This is said to happen with SCO. The old coffread.c
1245 code simply emptied the context stack, so we do the
1246 same. FIXME: Find out why it is happening. This is not
1247 believed to happen in most cases (even for coffread.c);
1248 it used to be an abort(). */
1249 complaint (&symfile_complaints
,
1250 _("Context stack not empty in end_symtab"));
1251 context_stack_depth
= 0;
1255 /* Reordered executables may have out of order pending blocks; if
1256 OBJF_REORDERED is true, then sort the pending blocks. */
1258 if ((objfile
->flags
& OBJF_REORDERED
) && pending_blocks
)
1261 struct pending_block
*pb
;
1262 struct block
**barray
, **bp
;
1263 struct cleanup
*back_to
;
1265 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1268 barray
= xmalloc (sizeof (*barray
) * count
);
1269 back_to
= make_cleanup (xfree
, barray
);
1272 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1275 qsort (barray
, count
, sizeof (*barray
), block_compar
);
1278 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1281 do_cleanups (back_to
);
1284 /* Cleanup any undefined types that have been left hanging around
1285 (this needs to be done before the finish_blocks so that
1286 file_symbols is still good).
1288 Both cleanup_undefined_stabs_types and finish_global_stabs are stabs
1289 specific, but harmless for other symbol readers, since on gdb
1290 startup or when finished reading stabs, the state is set so these
1291 are no-ops. FIXME: Is this handled right in case of QUIT? Can
1292 we make this cleaner? */
1294 cleanup_undefined_stabs_types (objfile
);
1295 finish_global_stabs (objfile
);
1298 && pending_blocks
== NULL
1299 && file_symbols
== NULL
1300 && global_symbols
== NULL
1301 && have_line_numbers
== 0
1302 && pending_macros
== NULL
1303 && global_using_directives
== NULL
)
1305 /* Ignore symtabs that have no functions with real debugging info. */
1310 /* Define the STATIC_BLOCK. */
1311 return finish_block_internal (NULL
, &file_symbols
, NULL
, NULL
,
1312 last_source_start_addr
, end_addr
,
1317 /* Subroutine of end_symtab_from_static_block to simplify it.
1318 Handle the "have blockvector" case.
1319 See end_symtab_from_static_block for a description of the arguments. */
1321 static struct compunit_symtab
*
1322 end_symtab_with_blockvector (struct block
*static_block
,
1323 int section
, int expandable
)
1325 struct objfile
*objfile
= buildsym_compunit
->objfile
;
1326 struct compunit_symtab
*cu
= buildsym_compunit
->compunit_symtab
;
1327 struct symtab
*symtab
;
1328 struct blockvector
*blockvector
;
1329 struct subfile
*subfile
;
1332 gdb_assert (static_block
!= NULL
);
1333 gdb_assert (buildsym_compunit
!= NULL
);
1334 gdb_assert (buildsym_compunit
->subfiles
!= NULL
);
1336 end_addr
= BLOCK_END (static_block
);
1338 /* Create the GLOBAL_BLOCK and build the blockvector. */
1339 finish_block_internal (NULL
, &global_symbols
, NULL
, NULL
,
1340 last_source_start_addr
, end_addr
,
1342 blockvector
= make_blockvector ();
1344 /* Read the line table if it has to be read separately.
1345 This is only used by xcoffread.c. */
1346 if (objfile
->sf
->sym_read_linetable
!= NULL
)
1347 objfile
->sf
->sym_read_linetable (objfile
);
1349 /* Handle the case where the debug info specifies a different path
1350 for the main source file. It can cause us to lose track of its
1351 line number information. */
1352 watch_main_source_file_lossage ();
1354 /* Now create the symtab objects proper, if not already done,
1355 one for each subfile. */
1357 for (subfile
= buildsym_compunit
->subfiles
;
1359 subfile
= subfile
->next
)
1361 int linetablesize
= 0;
1363 if (subfile
->line_vector
)
1365 linetablesize
= sizeof (struct linetable
) +
1366 subfile
->line_vector
->nitems
* sizeof (struct linetable_entry
);
1368 /* Like the pending blocks, the line table may be
1369 scrambled in reordered executables. Sort it if
1370 OBJF_REORDERED is true. */
1371 if (objfile
->flags
& OBJF_REORDERED
)
1372 qsort (subfile
->line_vector
->item
,
1373 subfile
->line_vector
->nitems
,
1374 sizeof (struct linetable_entry
), compare_line_numbers
);
1377 /* Allocate a symbol table if necessary. */
1378 if (subfile
->symtab
== NULL
)
1379 subfile
->symtab
= allocate_symtab (cu
, subfile
->name
);
1380 symtab
= subfile
->symtab
;
1382 /* Fill in its components. */
1384 if (subfile
->line_vector
)
1386 /* Reallocate the line table on the symbol obstack. */
1387 SYMTAB_LINETABLE (symtab
) = (struct linetable
*)
1388 obstack_alloc (&objfile
->objfile_obstack
, linetablesize
);
1389 memcpy (SYMTAB_LINETABLE (symtab
), subfile
->line_vector
,
1394 SYMTAB_LINETABLE (symtab
) = NULL
;
1397 /* Use whatever language we have been using for this
1398 subfile, not the one that was deduced in allocate_symtab
1399 from the filename. We already did our own deducing when
1400 we created the subfile, and we may have altered our
1401 opinion of what language it is from things we found in
1403 symtab
->language
= subfile
->language
;
1406 /* Make sure the symtab of main_subfile is the first in its list. */
1408 struct symtab
*main_symtab
, *prev_symtab
;
1410 main_symtab
= buildsym_compunit
->main_subfile
->symtab
;
1412 ALL_COMPUNIT_FILETABS (cu
, symtab
)
1414 if (symtab
== main_symtab
)
1416 if (prev_symtab
!= NULL
)
1418 prev_symtab
->next
= main_symtab
->next
;
1419 main_symtab
->next
= COMPUNIT_FILETABS (cu
);
1420 COMPUNIT_FILETABS (cu
) = main_symtab
;
1424 prev_symtab
= symtab
;
1426 gdb_assert (main_symtab
== COMPUNIT_FILETABS (cu
));
1429 /* Fill out the compunit symtab. */
1431 if (buildsym_compunit
->comp_dir
!= NULL
)
1433 /* Reallocate the dirname on the symbol obstack. */
1434 COMPUNIT_DIRNAME (cu
)
1435 = obstack_copy0 (&objfile
->objfile_obstack
,
1436 buildsym_compunit
->comp_dir
,
1437 strlen (buildsym_compunit
->comp_dir
));
1440 /* Save the debug format string (if any) in the symtab. */
1441 COMPUNIT_DEBUGFORMAT (cu
) = buildsym_compunit
->debugformat
;
1443 /* Similarly for the producer. */
1444 COMPUNIT_PRODUCER (cu
) = buildsym_compunit
->producer
;
1446 COMPUNIT_BLOCKVECTOR (cu
) = blockvector
;
1448 struct block
*b
= BLOCKVECTOR_BLOCK (blockvector
, GLOBAL_BLOCK
);
1450 set_block_compunit_symtab (b
, cu
);
1453 COMPUNIT_BLOCK_LINE_SECTION (cu
) = section
;
1455 COMPUNIT_MACRO_TABLE (cu
) = pending_macros
;
1457 /* Default any symbols without a specified symtab to the primary symtab. */
1461 /* The main source file's symtab. */
1462 symtab
= COMPUNIT_FILETABS (cu
);
1464 for (block_i
= 0; block_i
< BLOCKVECTOR_NBLOCKS (blockvector
); block_i
++)
1466 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, block_i
);
1468 struct dict_iterator iter
;
1470 /* Inlined functions may have symbols not in the global or
1471 static symbol lists. */
1472 if (BLOCK_FUNCTION (block
) != NULL
)
1473 if (symbol_symtab (BLOCK_FUNCTION (block
)) == NULL
)
1474 symbol_set_symtab (BLOCK_FUNCTION (block
), symtab
);
1476 /* Note that we only want to fix up symbols from the local
1477 blocks, not blocks coming from included symtabs. That is why
1478 we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */
1479 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
1480 if (symbol_symtab (sym
) == NULL
)
1481 symbol_set_symtab (sym
, symtab
);
1485 add_compunit_symtab_to_objfile (cu
);
1490 /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK
1491 as value returned by end_symtab_get_static_block.
1493 SECTION is the same as for end_symtab: the section number
1494 (in objfile->section_offsets) of the blockvector and linetable.
1496 If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made
1499 struct compunit_symtab
*
1500 end_symtab_from_static_block (struct block
*static_block
,
1501 int section
, int expandable
)
1503 struct compunit_symtab
*cu
;
1505 if (static_block
== NULL
)
1507 /* Handle the "no blockvector" case.
1508 When this happens there is nothing to record, so there's nothing
1509 to do: memory will be freed up later.
1511 Note: We won't be adding a compunit to the objfile's list of
1512 compunits, so there's nothing to unchain. However, since each symtab
1513 is added to the objfile's obstack we can't free that space.
1514 We could do better, but this is believed to be a sufficiently rare
1519 cu
= end_symtab_with_blockvector (static_block
, section
, expandable
);
1521 reset_symtab_globals ();
1526 /* Finish the symbol definitions for one main source file, close off
1527 all the lexical contexts for that file (creating struct block's for
1528 them), then make the struct symtab for that file and put it in the
1531 END_ADDR is the address of the end of the file's text. SECTION is
1532 the section number (in objfile->section_offsets) of the blockvector
1535 Note that it is possible for end_symtab() to return NULL. In
1536 particular, for the DWARF case at least, it will return NULL when
1537 it finds a compilation unit that has exactly one DIE, a
1538 TAG_compile_unit DIE. This can happen when we link in an object
1539 file that was compiled from an empty source file. Returning NULL
1540 is probably not the correct thing to do, because then gdb will
1541 never know about this empty file (FIXME).
1543 If you need to modify STATIC_BLOCK before it is finalized you should
1544 call end_symtab_get_static_block and end_symtab_from_static_block
1547 struct compunit_symtab
*
1548 end_symtab (CORE_ADDR end_addr
, int section
)
1550 struct block
*static_block
;
1552 static_block
= end_symtab_get_static_block (end_addr
, 0, 0);
1553 return end_symtab_from_static_block (static_block
, section
, 0);
1556 /* Same as end_symtab except create a symtab that can be later added to. */
1558 struct compunit_symtab
*
1559 end_expandable_symtab (CORE_ADDR end_addr
, int section
)
1561 struct block
*static_block
;
1563 static_block
= end_symtab_get_static_block (end_addr
, 1, 0);
1564 return end_symtab_from_static_block (static_block
, section
, 1);
1567 /* Subroutine of augment_type_symtab to simplify it.
1568 Attach the main source file's symtab to all symbols in PENDING_LIST that
1572 set_missing_symtab (struct pending
*pending_list
,
1573 struct compunit_symtab
*cu
)
1575 struct pending
*pending
;
1578 for (pending
= pending_list
; pending
!= NULL
; pending
= pending
->next
)
1580 for (i
= 0; i
< pending
->nsyms
; ++i
)
1582 if (symbol_symtab (pending
->symbol
[i
]) == NULL
)
1583 symbol_set_symtab (pending
->symbol
[i
], COMPUNIT_FILETABS (cu
));
1588 /* Same as end_symtab, but for the case where we're adding more symbols
1589 to an existing symtab that is known to contain only type information.
1590 This is the case for DWARF4 Type Units. */
1593 augment_type_symtab (void)
1595 struct compunit_symtab
*cust
= buildsym_compunit
->compunit_symtab
;
1596 const struct blockvector
*blockvector
= COMPUNIT_BLOCKVECTOR (cust
);
1598 if (context_stack_depth
> 0)
1600 complaint (&symfile_complaints
,
1601 _("Context stack not empty in augment_type_symtab"));
1602 context_stack_depth
= 0;
1604 if (pending_blocks
!= NULL
)
1605 complaint (&symfile_complaints
, _("Blocks in a type symtab"));
1606 if (pending_macros
!= NULL
)
1607 complaint (&symfile_complaints
, _("Macro in a type symtab"));
1608 if (have_line_numbers
)
1609 complaint (&symfile_complaints
,
1610 _("Line numbers recorded in a type symtab"));
1612 if (file_symbols
!= NULL
)
1614 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, STATIC_BLOCK
);
1616 /* First mark any symbols without a specified symtab as belonging
1617 to the primary symtab. */
1618 set_missing_symtab (file_symbols
, cust
);
1620 dict_add_pending (BLOCK_DICT (block
), file_symbols
);
1623 if (global_symbols
!= NULL
)
1625 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, GLOBAL_BLOCK
);
1627 /* First mark any symbols without a specified symtab as belonging
1628 to the primary symtab. */
1629 set_missing_symtab (global_symbols
, cust
);
1631 dict_add_pending (BLOCK_DICT (block
), global_symbols
);
1634 reset_symtab_globals ();
1637 /* Push a context block. Args are an identifying nesting level
1638 (checkable when you pop it), and the starting PC address of this
1641 struct context_stack
*
1642 push_context (int desc
, CORE_ADDR valu
)
1644 struct context_stack
*newobj
;
1646 if (context_stack_depth
== context_stack_size
)
1648 context_stack_size
*= 2;
1649 context_stack
= (struct context_stack
*)
1650 xrealloc ((char *) context_stack
,
1651 (context_stack_size
* sizeof (struct context_stack
)));
1654 newobj
= &context_stack
[context_stack_depth
++];
1655 newobj
->depth
= desc
;
1656 newobj
->locals
= local_symbols
;
1657 newobj
->old_blocks
= pending_blocks
;
1658 newobj
->start_addr
= valu
;
1659 newobj
->local_using_directives
= local_using_directives
;
1660 newobj
->name
= NULL
;
1662 local_symbols
= NULL
;
1663 local_using_directives
= NULL
;
1668 /* Pop a context block. Returns the address of the context block just
1671 struct context_stack
*
1674 gdb_assert (context_stack_depth
> 0);
1675 return (&context_stack
[--context_stack_depth
]);
1680 /* Compute a small integer hash code for the given name. */
1683 hashname (const char *name
)
1685 return (hash(name
,strlen(name
)) % HASHSIZE
);
1690 record_debugformat (const char *format
)
1692 buildsym_compunit
->debugformat
= format
;
1696 record_producer (const char *producer
)
1698 buildsym_compunit
->producer
= producer
;
1701 /* Merge the first symbol list SRCLIST into the second symbol list
1702 TARGETLIST by repeated calls to add_symbol_to_list(). This
1703 procedure "frees" each link of SRCLIST by adding it to the
1704 free_pendings list. Caller must set SRCLIST to a null list after
1705 calling this function.
1710 merge_symbol_lists (struct pending
**srclist
, struct pending
**targetlist
)
1714 if (!srclist
|| !*srclist
)
1717 /* Merge in elements from current link. */
1718 for (i
= 0; i
< (*srclist
)->nsyms
; i
++)
1719 add_symbol_to_list ((*srclist
)->symbol
[i
], targetlist
);
1721 /* Recurse on next. */
1722 merge_symbol_lists (&(*srclist
)->next
, targetlist
);
1724 /* "Free" the current link. */
1725 (*srclist
)->next
= free_pendings
;
1726 free_pendings
= (*srclist
);
1730 /* Name of source file whose symbol data we are now processing. This
1731 comes from a symbol of type N_SO for stabs. For Dwarf it comes
1732 from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */
1734 static char *last_source_file
;
1736 /* See buildsym.h. */
1739 set_last_source_file (const char *name
)
1741 xfree (last_source_file
);
1742 last_source_file
= name
== NULL
? NULL
: xstrdup (name
);
1745 /* See buildsym.h. */
1748 get_last_source_file (void)
1750 return last_source_file
;
1755 /* Initialize anything that needs initializing when starting to read a
1756 fresh piece of a symbol file, e.g. reading in the stuff
1757 corresponding to a psymtab. */
1760 buildsym_init (void)
1762 subfile_stack
= NULL
;
1764 pending_addrmap_interesting
= 0;
1766 /* Context stack is initially empty. Allocate first one with room
1767 for a few levels; reuse it forever afterward. */
1768 if (context_stack
== NULL
)
1770 context_stack_size
= INITIAL_CONTEXT_STACK_SIZE
;
1771 context_stack
= (struct context_stack
*)
1772 xmalloc (context_stack_size
* sizeof (struct context_stack
));
1775 /* Ensure the really_free_pendings cleanup was called after
1777 gdb_assert (free_pendings
== NULL
);
1778 gdb_assert (pending_blocks
== NULL
);
1779 gdb_assert (file_symbols
== NULL
);
1780 gdb_assert (global_symbols
== NULL
);
1781 gdb_assert (global_using_directives
== NULL
);
1782 gdb_assert (pending_macros
== NULL
);
1783 gdb_assert (pending_addrmap
== NULL
);
1784 gdb_assert (buildsym_compunit
== NULL
);
1787 /* Initialize anything that needs initializing when a completely new
1788 symbol file is specified (not just adding some symbols from another
1789 file, e.g. a shared library). */
1792 buildsym_new_init (void)