1 /* Support routines for building symbol tables in GDB's internal format.
2 Copyright (C) 1986-2018 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 scoped_free_pendings free_pending;
30 cust = start_symtab (...);
31 ... read debug info ...
32 cust = end_symtab (...);
34 The compunit symtab pointer ("cust") is returned from both start_symtab
35 and end_symtab to simplify the debug info readers.
37 There are minor variations on this, e.g., dwarf2read.c splits end_symtab
38 into two calls: end_symtab_get_static_block, end_symtab_from_static_block,
39 but all debug info readers follow this basic flow.
41 Reading DWARF Type Units is another variation:
44 scoped_free_pendings free_pending;
45 cust = start_symtab (...);
46 ... read debug info ...
47 cust = end_expandable_symtab (...);
49 And then reading subsequent Type Units within the containing "Comp Unit"
50 will use a second flow:
53 scoped_free_pendings free_pending;
54 cust = restart_symtab (...);
55 ... read debug info ...
56 cust = augment_type_symtab (...);
58 dbxread.c and xcoffread.c use another variation:
61 scoped_free_pendings free_pending;
62 cust = start_symtab (...);
63 ... read debug info ...
64 cust = end_symtab (...);
65 ... start_symtab + read + end_symtab repeated ...
70 #include "gdb_obstack.h"
75 #include "complaints.h"
76 #include "expression.h" /* For "enum exp_opcode" used by... */
77 #include "filenames.h" /* For DOSish file names. */
79 #include "demangle.h" /* Needed by SYMBOL_INIT_DEMANGLED_NAME. */
81 #include "cp-support.h"
82 #include "dictionary.h"
86 /* Ask buildsym.h to define the vars it normally declares `extern'. */
89 #include "buildsym.h" /* Our own declarations. */
92 /* For cleanup_undefined_stabs_types and finish_global_stabs (somewhat
93 questionable--see comment where we call them). */
95 #include "stabsread.h"
97 /* Buildsym's counterpart to struct compunit_symtab.
98 TODO(dje): Move all related global state into here. */
100 struct buildsym_compunit
102 /* Start recording information about a primary source file (IOW, not an
103 included source file).
104 COMP_DIR is the directory in which the compilation unit was compiled
105 (or NULL if not known). */
107 buildsym_compunit (struct objfile
*objfile_
, const char *name
,
108 const char *comp_dir_
, enum language language_
,
110 : objfile (objfile_
),
111 m_last_source_file (name
== nullptr ? nullptr : xstrdup (name
)),
112 comp_dir (comp_dir_
== nullptr ? nullptr : xstrdup (comp_dir_
)),
113 language (language_
),
114 m_last_source_start_addr (last_addr
)
118 ~buildsym_compunit ()
120 struct subfile
*subfile
, *nextsub
;
122 if (m_pending_macros
!= nullptr)
123 free_macro_table (m_pending_macros
);
125 for (subfile
= subfiles
;
129 nextsub
= subfile
->next
;
130 xfree (subfile
->name
);
131 xfree (subfile
->line_vector
);
136 void set_last_source_file (const char *name
)
138 char *new_name
= name
== NULL
? NULL
: xstrdup (name
);
139 m_last_source_file
.reset (new_name
);
142 struct macro_table
*get_macro_table ()
144 if (m_pending_macros
== nullptr)
145 m_pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
146 objfile
->per_bfd
->macro_cache
,
148 return m_pending_macros
;
151 struct macro_table
*release_macros ()
153 struct macro_table
*result
= m_pending_macros
;
154 m_pending_macros
= nullptr;
158 /* The objfile we're reading debug info from. */
159 struct objfile
*objfile
;
161 /* List of subfiles (source files).
162 Files are added to the front of the list.
163 This is important mostly for the language determination hacks we use,
164 which iterate over previously added files. */
165 struct subfile
*subfiles
= nullptr;
167 /* The subfile of the main source file. */
168 struct subfile
*main_subfile
= nullptr;
170 /* Name of source file whose symbol data we are now processing. This
171 comes from a symbol of type N_SO for stabs. For DWARF it comes
172 from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */
173 gdb::unique_xmalloc_ptr
<char> m_last_source_file
;
175 /* E.g., DW_AT_comp_dir if DWARF. Space for this is malloc'd. */
176 gdb::unique_xmalloc_ptr
<char> comp_dir
;
178 /* Space for this is not malloc'd, and is assumed to have at least
179 the same lifetime as objfile. */
180 const char *producer
= nullptr;
182 /* Space for this is not malloc'd, and is assumed to have at least
183 the same lifetime as objfile. */
184 const char *debugformat
= nullptr;
186 /* The compunit we are building. */
187 struct compunit_symtab
*compunit_symtab
= nullptr;
189 /* Language of this compunit_symtab. */
190 enum language language
;
192 /* The macro table for the compilation unit whose symbols we're
193 currently reading. */
194 struct macro_table
*m_pending_macros
= nullptr;
196 /* True if symtab has line number info. This prevents an otherwise
197 empty symtab from being tossed. */
198 bool m_have_line_numbers
= false;
200 /* Core address of start of text of current source file. This too
201 comes from the N_SO symbol. For Dwarf it typically comes from the
202 DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE. */
203 CORE_ADDR m_last_source_start_addr
;
205 /* Stack of subfile names. */
206 std::vector
<const char *> m_subfile_stack
;
208 /* The "using" directives local to lexical context. */
209 struct using_direct
*m_local_using_directives
= nullptr;
211 /* Global "using" directives. */
212 struct using_direct
*m_global_using_directives
= nullptr;
214 /* The stack of contexts that are pushed by push_context and popped
216 std::vector
<struct context_stack
> m_context_stack
;
218 struct subfile
*m_current_subfile
= nullptr;
221 /* The work-in-progress of the compunit we are building.
222 This is created first, before any subfiles by start_symtab. */
224 static struct buildsym_compunit
*buildsym_compunit
;
226 /* List of free `struct pending' structures for reuse. */
228 static struct pending
*free_pendings
;
230 /* The mutable address map for the compilation unit whose symbols
231 we're currently reading. The symtabs' shared blockvector will
232 point to a fixed copy of this. */
233 static struct addrmap
*pending_addrmap
;
235 /* The obstack on which we allocate pending_addrmap.
236 If pending_addrmap is NULL, this is uninitialized; otherwise, it is
237 initialized (and holds pending_addrmap). */
238 static struct obstack pending_addrmap_obstack
;
240 /* Non-zero if we recorded any ranges in the addrmap that are
241 different from those in the blockvector already. We set this to
242 zero when we start processing a symfile, and if it's still zero at
243 the end, then we just toss the addrmap. */
244 static int pending_addrmap_interesting
;
246 /* An obstack used for allocating pending blocks. */
248 static struct obstack pending_block_obstack
;
250 /* List of blocks already made (lexical contexts already closed).
251 This is used at the end to make the blockvector. */
255 struct pending_block
*next
;
259 /* Pointer to the head of a linked list of symbol blocks which have
260 already been finalized (lexical contexts already closed) and which
261 are just waiting to be built into a blockvector when finalizing the
262 associated symtab. */
264 static struct pending_block
*pending_blocks
;
266 static void free_buildsym_compunit (void);
268 static int compare_line_numbers (const void *ln1p
, const void *ln2p
);
270 static void record_pending_block (struct objfile
*objfile
,
272 struct pending_block
*opblock
);
274 static void free_pending_blocks ();
276 /* Initial sizes of data structures. These are realloc'd larger if
277 needed, and realloc'd down to the size actually used, when
280 #define INITIAL_LINE_VECTOR_LENGTH 1000
283 /* Maintain the lists of symbols and blocks. */
285 /* Add a symbol to one of the lists of symbols. */
288 add_symbol_to_list (struct symbol
*symbol
, struct pending
**listhead
)
290 struct pending
*link
;
292 /* If this is an alias for another symbol, don't add it. */
293 if (symbol
->ginfo
.name
&& symbol
->ginfo
.name
[0] == '#')
296 /* We keep PENDINGSIZE symbols in each link of the list. If we
297 don't have a link with room in it, add a new link. */
298 if (*listhead
== NULL
|| (*listhead
)->nsyms
== PENDINGSIZE
)
302 link
= free_pendings
;
303 free_pendings
= link
->next
;
307 link
= XNEW (struct pending
);
310 link
->next
= *listhead
;
315 (*listhead
)->symbol
[(*listhead
)->nsyms
++] = symbol
;
318 /* Find a symbol named NAME on a LIST. NAME need not be
319 '\0'-terminated; LENGTH is the length of the name. */
322 find_symbol_in_list (struct pending
*list
, char *name
, int length
)
329 for (j
= list
->nsyms
; --j
>= 0;)
331 pp
= SYMBOL_LINKAGE_NAME (list
->symbol
[j
]);
332 if (*pp
== *name
&& strncmp (pp
, name
, length
) == 0
333 && pp
[length
] == '\0')
335 return (list
->symbol
[j
]);
343 scoped_free_pendings::scoped_free_pendings ()
345 gdb_assert (pending_blocks
== nullptr);
348 /* At end of reading syms, or in case of quit, ensure everything
349 associated with building symtabs is freed.
351 N.B. This is *not* intended to be used when building psymtabs. Some debug
352 info readers call this anyway, which is harmless if confusing. */
354 scoped_free_pendings::~scoped_free_pendings ()
356 struct pending
*next
, *next1
;
358 for (next
= free_pendings
; next
; next
= next1
)
361 xfree ((void *) next
);
363 free_pendings
= NULL
;
365 free_pending_blocks ();
367 for (next
= file_symbols
; next
!= NULL
; next
= next1
)
370 xfree ((void *) next
);
374 for (next
= global_symbols
; next
!= NULL
; next
= next1
)
377 xfree ((void *) next
);
379 global_symbols
= NULL
;
382 obstack_free (&pending_addrmap_obstack
, NULL
);
383 pending_addrmap
= NULL
;
385 free_buildsym_compunit ();
388 /* This function is called to discard any pending blocks. */
391 free_pending_blocks ()
393 if (pending_blocks
!= NULL
)
395 obstack_free (&pending_block_obstack
, NULL
);
396 pending_blocks
= NULL
;
400 /* Take one of the lists of symbols and make a block from it. Keep
401 the order the symbols have in the list (reversed from the input
402 file). Put the block on the list of pending blocks. */
404 static struct block
*
405 finish_block_internal (struct symbol
*symbol
,
406 struct pending
**listhead
,
407 struct pending_block
*old_blocks
,
408 const struct dynamic_prop
*static_link
,
409 CORE_ADDR start
, CORE_ADDR end
,
410 int is_global
, int expandable
)
412 struct objfile
*objfile
= buildsym_compunit
->objfile
;
413 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
414 struct pending
*next
, *next1
;
416 struct pending_block
*pblock
;
417 struct pending_block
*opblock
;
420 ? allocate_global_block (&objfile
->objfile_obstack
)
421 : allocate_block (&objfile
->objfile_obstack
));
426 = dict_create_linear (&objfile
->objfile_obstack
,
427 buildsym_compunit
->language
, *listhead
);
434 = dict_create_hashed_expandable (buildsym_compunit
->language
);
435 dict_add_pending (BLOCK_DICT (block
), *listhead
);
440 dict_create_hashed (&objfile
->objfile_obstack
,
441 buildsym_compunit
->language
, *listhead
);
445 BLOCK_START (block
) = start
;
446 BLOCK_END (block
) = end
;
448 /* Put the block in as the value of the symbol that names it. */
452 struct type
*ftype
= SYMBOL_TYPE (symbol
);
453 struct dict_iterator iter
;
454 SYMBOL_BLOCK_VALUE (symbol
) = block
;
455 BLOCK_FUNCTION (block
) = symbol
;
457 if (TYPE_NFIELDS (ftype
) <= 0)
459 /* No parameter type information is recorded with the
460 function's type. Set that from the type of the
461 parameter symbols. */
462 int nparams
= 0, iparams
;
465 /* Here we want to directly access the dictionary, because
466 we haven't fully initialized the block yet. */
467 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
469 if (SYMBOL_IS_ARGUMENT (sym
))
474 TYPE_NFIELDS (ftype
) = nparams
;
475 TYPE_FIELDS (ftype
) = (struct field
*)
476 TYPE_ALLOC (ftype
, nparams
* sizeof (struct field
));
479 /* Here we want to directly access the dictionary, because
480 we haven't fully initialized the block yet. */
481 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
483 if (iparams
== nparams
)
486 if (SYMBOL_IS_ARGUMENT (sym
))
488 TYPE_FIELD_TYPE (ftype
, iparams
) = SYMBOL_TYPE (sym
);
489 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
498 BLOCK_FUNCTION (block
) = NULL
;
501 if (static_link
!= NULL
)
502 objfile_register_static_link (objfile
, block
, static_link
);
504 /* Now "free" the links of the list, and empty the list. */
506 for (next
= *listhead
; next
; next
= next1
)
509 next
->next
= free_pendings
;
510 free_pendings
= next
;
514 /* Check to be sure that the blocks have an end address that is
515 greater than starting address. */
517 if (BLOCK_END (block
) < BLOCK_START (block
))
521 complaint (_("block end address less than block "
522 "start address in %s (patched it)"),
523 SYMBOL_PRINT_NAME (symbol
));
527 complaint (_("block end address %s less than block "
528 "start address %s (patched it)"),
529 paddress (gdbarch
, BLOCK_END (block
)),
530 paddress (gdbarch
, BLOCK_START (block
)));
532 /* Better than nothing. */
533 BLOCK_END (block
) = BLOCK_START (block
);
536 /* Install this block as the superblock of all blocks made since the
537 start of this scope that don't have superblocks yet. */
540 for (pblock
= pending_blocks
;
541 pblock
&& pblock
!= old_blocks
;
542 pblock
= pblock
->next
)
544 if (BLOCK_SUPERBLOCK (pblock
->block
) == NULL
)
546 /* Check to be sure the blocks are nested as we receive
547 them. If the compiler/assembler/linker work, this just
548 burns a small amount of time.
550 Skip blocks which correspond to a function; they're not
551 physically nested inside this other blocks, only
553 if (BLOCK_FUNCTION (pblock
->block
) == NULL
554 && (BLOCK_START (pblock
->block
) < BLOCK_START (block
)
555 || BLOCK_END (pblock
->block
) > BLOCK_END (block
)))
559 complaint (_("inner block not inside outer block in %s"),
560 SYMBOL_PRINT_NAME (symbol
));
564 complaint (_("inner block (%s-%s) not "
565 "inside outer block (%s-%s)"),
566 paddress (gdbarch
, BLOCK_START (pblock
->block
)),
567 paddress (gdbarch
, BLOCK_END (pblock
->block
)),
568 paddress (gdbarch
, BLOCK_START (block
)),
569 paddress (gdbarch
, BLOCK_END (block
)));
571 if (BLOCK_START (pblock
->block
) < BLOCK_START (block
))
572 BLOCK_START (pblock
->block
) = BLOCK_START (block
);
573 if (BLOCK_END (pblock
->block
) > BLOCK_END (block
))
574 BLOCK_END (pblock
->block
) = BLOCK_END (block
);
576 BLOCK_SUPERBLOCK (pblock
->block
) = block
;
581 block_set_using (block
,
583 ? buildsym_compunit
->m_global_using_directives
584 : buildsym_compunit
->m_local_using_directives
),
585 &objfile
->objfile_obstack
);
587 buildsym_compunit
->m_global_using_directives
= NULL
;
589 buildsym_compunit
->m_local_using_directives
= NULL
;
591 record_pending_block (objfile
, block
, opblock
);
597 finish_block (struct symbol
*symbol
,
598 struct pending
**listhead
,
599 struct pending_block
*old_blocks
,
600 const struct dynamic_prop
*static_link
,
601 CORE_ADDR start
, CORE_ADDR end
)
603 return finish_block_internal (symbol
, listhead
, old_blocks
, static_link
,
607 /* Record BLOCK on the list of all blocks in the file. Put it after
608 OPBLOCK, or at the beginning if opblock is NULL. This puts the
609 block in the list after all its subblocks.
611 Allocate the pending block struct in the objfile_obstack to save
612 time. This wastes a little space. FIXME: Is it worth it? */
615 record_pending_block (struct objfile
*objfile
, struct block
*block
,
616 struct pending_block
*opblock
)
618 struct pending_block
*pblock
;
620 if (pending_blocks
== NULL
)
621 obstack_init (&pending_block_obstack
);
623 pblock
= XOBNEW (&pending_block_obstack
, struct pending_block
);
624 pblock
->block
= block
;
627 pblock
->next
= opblock
->next
;
628 opblock
->next
= pblock
;
632 pblock
->next
= pending_blocks
;
633 pending_blocks
= pblock
;
638 /* Record that the range of addresses from START to END_INCLUSIVE
639 (inclusive, like it says) belongs to BLOCK. BLOCK's start and end
640 addresses must be set already. You must apply this function to all
641 BLOCK's children before applying it to BLOCK.
643 If a call to this function complicates the picture beyond that
644 already provided by BLOCK_START and BLOCK_END, then we create an
645 address map for the block. */
647 record_block_range (struct block
*block
,
648 CORE_ADDR start
, CORE_ADDR end_inclusive
)
650 /* If this is any different from the range recorded in the block's
651 own BLOCK_START and BLOCK_END, then note that the address map has
652 become interesting. Note that even if this block doesn't have
653 any "interesting" ranges, some later block might, so we still
654 need to record this block in the addrmap. */
655 if (start
!= BLOCK_START (block
)
656 || end_inclusive
+ 1 != BLOCK_END (block
))
657 pending_addrmap_interesting
= 1;
659 if (! pending_addrmap
)
661 obstack_init (&pending_addrmap_obstack
);
662 pending_addrmap
= addrmap_create_mutable (&pending_addrmap_obstack
);
665 addrmap_set_empty (pending_addrmap
, start
, end_inclusive
, block
);
668 static struct blockvector
*
669 make_blockvector (void)
671 struct objfile
*objfile
= buildsym_compunit
->objfile
;
672 struct pending_block
*next
;
673 struct blockvector
*blockvector
;
676 /* Count the length of the list of blocks. */
678 for (next
= pending_blocks
, i
= 0; next
; next
= next
->next
, i
++)
682 blockvector
= (struct blockvector
*)
683 obstack_alloc (&objfile
->objfile_obstack
,
684 (sizeof (struct blockvector
)
685 + (i
- 1) * sizeof (struct block
*)));
687 /* Copy the blocks into the blockvector. This is done in reverse
688 order, which happens to put the blocks into the proper order
689 (ascending starting address). finish_block has hair to insert
690 each block into the list after its subblocks in order to make
691 sure this is true. */
693 BLOCKVECTOR_NBLOCKS (blockvector
) = i
;
694 for (next
= pending_blocks
; next
; next
= next
->next
)
696 BLOCKVECTOR_BLOCK (blockvector
, --i
) = next
->block
;
699 free_pending_blocks ();
701 /* If we needed an address map for this symtab, record it in the
703 if (pending_addrmap
&& pending_addrmap_interesting
)
704 BLOCKVECTOR_MAP (blockvector
)
705 = addrmap_create_fixed (pending_addrmap
, &objfile
->objfile_obstack
);
707 BLOCKVECTOR_MAP (blockvector
) = 0;
709 /* Some compilers output blocks in the wrong order, but we depend on
710 their being in the right order so we can binary search. Check the
711 order and moan about it.
712 Note: Remember that the first two blocks are the global and static
713 blocks. We could special case that fact and begin checking at block 2.
714 To avoid making that assumption we do not. */
715 if (BLOCKVECTOR_NBLOCKS (blockvector
) > 1)
717 for (i
= 1; i
< BLOCKVECTOR_NBLOCKS (blockvector
); i
++)
719 if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
- 1))
720 > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
)))
723 = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
));
725 complaint (_("block at %s out of order"),
726 hex_string ((LONGEST
) start
));
731 return (blockvector
);
734 /* Start recording information about source code that came from an
735 included (or otherwise merged-in) source file with a different
736 name. NAME is the name of the file (cannot be NULL). */
739 start_subfile (const char *name
)
741 const char *subfile_dirname
;
742 struct subfile
*subfile
;
744 gdb_assert (buildsym_compunit
!= NULL
);
746 subfile_dirname
= buildsym_compunit
->comp_dir
.get ();
748 /* See if this subfile is already registered. */
750 for (subfile
= buildsym_compunit
->subfiles
; subfile
; subfile
= subfile
->next
)
754 /* If NAME is an absolute path, and this subfile is not, then
755 attempt to create an absolute path to compare. */
756 if (IS_ABSOLUTE_PATH (name
)
757 && !IS_ABSOLUTE_PATH (subfile
->name
)
758 && subfile_dirname
!= NULL
)
759 subfile_name
= concat (subfile_dirname
, SLASH_STRING
,
760 subfile
->name
, (char *) NULL
);
762 subfile_name
= subfile
->name
;
764 if (FILENAME_CMP (subfile_name
, name
) == 0)
766 buildsym_compunit
->m_current_subfile
= subfile
;
767 if (subfile_name
!= subfile
->name
)
768 xfree (subfile_name
);
771 if (subfile_name
!= subfile
->name
)
772 xfree (subfile_name
);
775 /* This subfile is not known. Add an entry for it. */
777 subfile
= XNEW (struct subfile
);
778 memset (subfile
, 0, sizeof (struct subfile
));
779 subfile
->buildsym_compunit
= buildsym_compunit
;
781 subfile
->next
= buildsym_compunit
->subfiles
;
782 buildsym_compunit
->subfiles
= subfile
;
784 buildsym_compunit
->m_current_subfile
= subfile
;
786 subfile
->name
= xstrdup (name
);
788 /* Initialize line-number recording for this subfile. */
789 subfile
->line_vector
= NULL
;
791 /* Default the source language to whatever can be deduced from the
792 filename. If nothing can be deduced (such as for a C/C++ include
793 file with a ".h" extension), then inherit whatever language the
794 previous subfile had. This kludgery is necessary because there
795 is no standard way in some object formats to record the source
796 language. Also, when symtabs are allocated we try to deduce a
797 language then as well, but it is too late for us to use that
798 information while reading symbols, since symtabs aren't allocated
799 until after all the symbols have been processed for a given
802 subfile
->language
= deduce_language_from_filename (subfile
->name
);
803 if (subfile
->language
== language_unknown
804 && subfile
->next
!= NULL
)
806 subfile
->language
= subfile
->next
->language
;
809 /* If the filename of this subfile ends in .C, then change the
810 language of any pending subfiles from C to C++. We also accept
811 any other C++ suffixes accepted by deduce_language_from_filename. */
812 /* Likewise for f2c. */
817 enum language sublang
= deduce_language_from_filename (subfile
->name
);
819 if (sublang
== language_cplus
|| sublang
== language_fortran
)
820 for (s
= buildsym_compunit
->subfiles
; s
!= NULL
; s
= s
->next
)
821 if (s
->language
== language_c
)
822 s
->language
= sublang
;
825 /* And patch up this file if necessary. */
826 if (subfile
->language
== language_c
827 && subfile
->next
!= NULL
828 && (subfile
->next
->language
== language_cplus
829 || subfile
->next
->language
== language_fortran
))
831 subfile
->language
= subfile
->next
->language
;
835 /* Delete the buildsym compunit. */
838 free_buildsym_compunit (void)
840 if (buildsym_compunit
== NULL
)
842 delete buildsym_compunit
;
843 buildsym_compunit
= NULL
;
846 /* For stabs readers, the first N_SO symbol is assumed to be the
847 source file name, and the subfile struct is initialized using that
848 assumption. If another N_SO symbol is later seen, immediately
849 following the first one, then the first one is assumed to be the
850 directory name and the second one is really the source file name.
852 So we have to patch up the subfile struct by moving the old name
853 value to dirname and remembering the new name. Some sanity
854 checking is performed to ensure that the state of the subfile
855 struct is reasonable and that the old name we are assuming to be a
856 directory name actually is (by checking for a trailing '/'). */
859 patch_subfile_names (struct subfile
*subfile
, const char *name
)
862 && buildsym_compunit
->comp_dir
== NULL
863 && subfile
->name
!= NULL
864 && IS_DIR_SEPARATOR (subfile
->name
[strlen (subfile
->name
) - 1]))
866 buildsym_compunit
->comp_dir
.reset (subfile
->name
);
867 subfile
->name
= xstrdup (name
);
868 set_last_source_file (name
);
870 /* Default the source language to whatever can be deduced from
871 the filename. If nothing can be deduced (such as for a C/C++
872 include file with a ".h" extension), then inherit whatever
873 language the previous subfile had. This kludgery is
874 necessary because there is no standard way in some object
875 formats to record the source language. Also, when symtabs
876 are allocated we try to deduce a language then as well, but
877 it is too late for us to use that information while reading
878 symbols, since symtabs aren't allocated until after all the
879 symbols have been processed for a given source file. */
881 subfile
->language
= deduce_language_from_filename (subfile
->name
);
882 if (subfile
->language
== language_unknown
883 && subfile
->next
!= NULL
)
885 subfile
->language
= subfile
->next
->language
;
890 /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for
891 switching source files (different subfiles, as we call them) within
892 one object file, but using a stack rather than in an arbitrary
898 gdb_assert (buildsym_compunit
!= nullptr);
899 gdb_assert (buildsym_compunit
->m_current_subfile
!= NULL
);
900 gdb_assert (buildsym_compunit
->m_current_subfile
->name
!= NULL
);
901 buildsym_compunit
->m_subfile_stack
.push_back
902 (buildsym_compunit
->m_current_subfile
->name
);
908 gdb_assert (buildsym_compunit
!= nullptr);
909 gdb_assert (!buildsym_compunit
->m_subfile_stack
.empty ());
910 const char *name
= buildsym_compunit
->m_subfile_stack
.back ();
911 buildsym_compunit
->m_subfile_stack
.pop_back ();
915 /* Add a linetable entry for line number LINE and address PC to the
916 line vector for SUBFILE. */
919 record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
921 struct linetable_entry
*e
;
923 /* Ignore the dummy line number in libg.o */
929 /* Make sure line vector exists and is big enough. */
930 if (!subfile
->line_vector
)
932 subfile
->line_vector_length
= INITIAL_LINE_VECTOR_LENGTH
;
933 subfile
->line_vector
= (struct linetable
*)
934 xmalloc (sizeof (struct linetable
)
935 + subfile
->line_vector_length
* sizeof (struct linetable_entry
));
936 subfile
->line_vector
->nitems
= 0;
937 buildsym_compunit
->m_have_line_numbers
= true;
940 if (subfile
->line_vector
->nitems
+ 1 >= subfile
->line_vector_length
)
942 subfile
->line_vector_length
*= 2;
943 subfile
->line_vector
= (struct linetable
*)
944 xrealloc ((char *) subfile
->line_vector
,
945 (sizeof (struct linetable
)
946 + (subfile
->line_vector_length
947 * sizeof (struct linetable_entry
))));
950 /* Normally, we treat lines as unsorted. But the end of sequence
951 marker is special. We sort line markers at the same PC by line
952 number, so end of sequence markers (which have line == 0) appear
953 first. This is right if the marker ends the previous function,
954 and there is no padding before the next function. But it is
955 wrong if the previous line was empty and we are now marking a
956 switch to a different subfile. We must leave the end of sequence
957 marker at the end of this group of lines, not sort the empty line
958 to after the marker. The easiest way to accomplish this is to
959 delete any empty lines from our table, if they are followed by
960 end of sequence markers. All we lose is the ability to set
961 breakpoints at some lines which contain no instructions
963 if (line
== 0 && subfile
->line_vector
->nitems
> 0)
965 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
- 1;
966 while (subfile
->line_vector
->nitems
> 0 && e
->pc
== pc
)
969 subfile
->line_vector
->nitems
--;
973 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
++;
978 /* Needed in order to sort line tables from IBM xcoff files. Sigh! */
981 compare_line_numbers (const void *ln1p
, const void *ln2p
)
983 struct linetable_entry
*ln1
= (struct linetable_entry
*) ln1p
;
984 struct linetable_entry
*ln2
= (struct linetable_entry
*) ln2p
;
986 /* Note: this code does not assume that CORE_ADDRs can fit in ints.
987 Please keep it that way. */
988 if (ln1
->pc
< ln2
->pc
)
991 if (ln1
->pc
> ln2
->pc
)
994 /* If pc equal, sort by line. I'm not sure whether this is optimum
995 behavior (see comment at struct linetable in symtab.h). */
996 return ln1
->line
- ln2
->line
;
999 /* See buildsym.h. */
1001 struct compunit_symtab
*
1002 buildsym_compunit_symtab (void)
1004 gdb_assert (buildsym_compunit
!= NULL
);
1006 return buildsym_compunit
->compunit_symtab
;
1009 /* See buildsym.h. */
1011 struct macro_table
*
1012 get_macro_table (void)
1014 struct objfile
*objfile
;
1016 gdb_assert (buildsym_compunit
!= NULL
);
1017 return buildsym_compunit
->get_macro_table ();
1020 /* Init state to prepare for building a symtab.
1021 Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c
1022 can call start_symtab+end_symtab multiple times after one call to
1026 prepare_for_building ()
1028 local_symbols
= NULL
;
1030 /* These should have been reset either by successful completion of building
1031 a symtab, or by the scoped_free_pendings destructor. */
1032 gdb_assert (file_symbols
== NULL
);
1033 gdb_assert (global_symbols
== NULL
);
1034 gdb_assert (pending_addrmap
== NULL
);
1035 gdb_assert (buildsym_compunit
== nullptr);
1038 /* Start a new symtab for a new source file in OBJFILE. Called, for example,
1039 when a stabs symbol of type N_SO is seen, or when a DWARF
1040 TAG_compile_unit DIE is seen. It indicates the start of data for
1041 one original source file.
1043 NAME is the name of the file (cannot be NULL). COMP_DIR is the
1044 directory in which the file was compiled (or NULL if not known).
1045 START_ADDR is the lowest address of objects in the file (or 0 if
1046 not known). LANGUAGE is the language of the source file, or
1047 language_unknown if not known, in which case it'll be deduced from
1050 struct compunit_symtab
*
1051 start_symtab (struct objfile
*objfile
, const char *name
, const char *comp_dir
,
1052 CORE_ADDR start_addr
, enum language language
)
1054 prepare_for_building ();
1056 buildsym_compunit
= new struct buildsym_compunit (objfile
, name
, comp_dir
,
1057 language
, start_addr
);
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
= buildsym_compunit
->m_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 ();
1094 = new struct buildsym_compunit (COMPUNIT_OBJFILE (cust
),
1096 COMPUNIT_DIRNAME (cust
),
1097 compunit_language (cust
),
1099 buildsym_compunit
->compunit_symtab
= cust
;
1102 /* Subroutine of end_symtab to simplify it. Look for a subfile that
1103 matches the main source file's basename. If there is only one, and
1104 if the main source file doesn't have any symbol or line number
1105 information, then copy this file's symtab and line_vector to the
1106 main source file's subfile and discard the other subfile. This can
1107 happen because of a compiler bug or from the user playing games
1108 with #line or from things like a distributed build system that
1109 manipulates the debug info. This can also happen from an innocent
1110 symlink in the paths, we don't canonicalize paths here. */
1113 watch_main_source_file_lossage (void)
1115 struct subfile
*mainsub
, *subfile
;
1117 /* We have to watch for buildsym_compunit == NULL here. It's a quirk of
1118 end_symtab, it can return NULL so there may not be a main subfile. */
1119 if (buildsym_compunit
== NULL
)
1122 /* Get the main source file. */
1123 mainsub
= buildsym_compunit
->main_subfile
;
1125 /* If the main source file doesn't have any line number or symbol
1126 info, look for an alias in another subfile. */
1128 if (mainsub
->line_vector
== NULL
1129 && mainsub
->symtab
== NULL
)
1131 const char *mainbase
= lbasename (mainsub
->name
);
1133 struct subfile
*prevsub
;
1134 struct subfile
*mainsub_alias
= NULL
;
1135 struct subfile
*prev_mainsub_alias
= NULL
;
1138 for (subfile
= buildsym_compunit
->subfiles
;
1140 subfile
= subfile
->next
)
1142 if (subfile
== mainsub
)
1144 if (filename_cmp (lbasename (subfile
->name
), mainbase
) == 0)
1147 mainsub_alias
= subfile
;
1148 prev_mainsub_alias
= prevsub
;
1153 if (nr_matches
== 1)
1155 gdb_assert (mainsub_alias
!= NULL
&& mainsub_alias
!= mainsub
);
1157 /* Found a match for the main source file.
1158 Copy its line_vector and symtab to the main subfile
1159 and then discard it. */
1161 mainsub
->line_vector
= mainsub_alias
->line_vector
;
1162 mainsub
->line_vector_length
= mainsub_alias
->line_vector_length
;
1163 mainsub
->symtab
= mainsub_alias
->symtab
;
1165 if (prev_mainsub_alias
== NULL
)
1166 buildsym_compunit
->subfiles
= mainsub_alias
->next
;
1168 prev_mainsub_alias
->next
= mainsub_alias
->next
;
1169 xfree (mainsub_alias
->name
);
1170 xfree (mainsub_alias
);
1175 /* Reset state after a successful building of a symtab.
1176 This exists because dbxread.c and xcoffread.c can call
1177 start_symtab+end_symtab multiple times after one call to buildsym_init,
1178 and before the scoped_free_pendings destructor is called.
1179 We keep the free_pendings list around for dbx/xcoff sake. */
1182 reset_symtab_globals (void)
1184 local_symbols
= NULL
;
1185 file_symbols
= NULL
;
1186 global_symbols
= NULL
;
1188 if (pending_addrmap
)
1189 obstack_free (&pending_addrmap_obstack
, NULL
);
1190 pending_addrmap
= NULL
;
1192 free_buildsym_compunit ();
1195 /* Implementation of the first part of end_symtab. It allows modifying
1196 STATIC_BLOCK before it gets finalized by end_symtab_from_static_block.
1197 If the returned value is NULL there is no blockvector created for
1198 this symtab (you still must call end_symtab_from_static_block).
1200 END_ADDR is the same as for end_symtab: the address of the end of the
1203 If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made
1206 If REQUIRED is non-zero, then a symtab is created even if it does
1207 not contain any symbols. */
1210 end_symtab_get_static_block (CORE_ADDR end_addr
, int expandable
, int required
)
1212 struct objfile
*objfile
= buildsym_compunit
->objfile
;
1214 /* Finish the lexical context of the last function in the file; pop
1215 the context stack. */
1217 if (!buildsym_compunit
->m_context_stack
.empty ())
1219 struct context_stack cstk
= pop_context ();
1221 /* Make a block for the local symbols within. */
1222 finish_block (cstk
.name
, &local_symbols
, cstk
.old_blocks
, NULL
,
1223 cstk
.start_addr
, end_addr
);
1225 if (!buildsym_compunit
->m_context_stack
.empty ())
1227 /* This is said to happen with SCO. The old coffread.c
1228 code simply emptied the context stack, so we do the
1229 same. FIXME: Find out why it is happening. This is not
1230 believed to happen in most cases (even for coffread.c);
1231 it used to be an abort(). */
1232 complaint (_("Context stack not empty in end_symtab"));
1233 buildsym_compunit
->m_context_stack
.clear ();
1237 /* Reordered executables may have out of order pending blocks; if
1238 OBJF_REORDERED is true, then sort the pending blocks. */
1240 if ((objfile
->flags
& OBJF_REORDERED
) && pending_blocks
)
1242 struct pending_block
*pb
;
1244 std::vector
<block
*> barray
;
1246 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1247 barray
.push_back (pb
->block
);
1249 /* Sort blocks by start address in descending order. Blocks with the
1250 same start address must remain in the original order to preserve
1251 inline function caller/callee relationships. */
1252 std::stable_sort (barray
.begin (), barray
.end (),
1253 [] (const block
*a
, const block
*b
)
1255 return BLOCK_START (a
) > BLOCK_START (b
);
1259 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1260 pb
->block
= barray
[i
++];
1263 /* Cleanup any undefined types that have been left hanging around
1264 (this needs to be done before the finish_blocks so that
1265 file_symbols is still good).
1267 Both cleanup_undefined_stabs_types and finish_global_stabs are stabs
1268 specific, but harmless for other symbol readers, since on gdb
1269 startup or when finished reading stabs, the state is set so these
1270 are no-ops. FIXME: Is this handled right in case of QUIT? Can
1271 we make this cleaner? */
1273 cleanup_undefined_stabs_types (objfile
);
1274 finish_global_stabs (objfile
);
1277 && pending_blocks
== NULL
1278 && file_symbols
== NULL
1279 && global_symbols
== NULL
1280 && !buildsym_compunit
->m_have_line_numbers
1281 && buildsym_compunit
->m_pending_macros
== NULL
1282 && buildsym_compunit
->m_global_using_directives
== NULL
)
1284 /* Ignore symtabs that have no functions with real debugging info. */
1289 /* Define the STATIC_BLOCK. */
1290 return finish_block_internal (NULL
, &file_symbols
, NULL
, NULL
,
1291 buildsym_compunit
->m_last_source_start_addr
,
1292 end_addr
, 0, expandable
);
1296 /* Subroutine of end_symtab_from_static_block to simplify it.
1297 Handle the "have blockvector" case.
1298 See end_symtab_from_static_block for a description of the arguments. */
1300 static struct compunit_symtab
*
1301 end_symtab_with_blockvector (struct block
*static_block
,
1302 int section
, int expandable
)
1304 struct objfile
*objfile
= buildsym_compunit
->objfile
;
1305 struct compunit_symtab
*cu
= buildsym_compunit
->compunit_symtab
;
1306 struct symtab
*symtab
;
1307 struct blockvector
*blockvector
;
1308 struct subfile
*subfile
;
1311 gdb_assert (static_block
!= NULL
);
1312 gdb_assert (buildsym_compunit
!= NULL
);
1313 gdb_assert (buildsym_compunit
->subfiles
!= NULL
);
1315 end_addr
= BLOCK_END (static_block
);
1317 /* Create the GLOBAL_BLOCK and build the blockvector. */
1318 finish_block_internal (NULL
, &global_symbols
, NULL
, NULL
,
1319 buildsym_compunit
->m_last_source_start_addr
, end_addr
,
1321 blockvector
= make_blockvector ();
1323 /* Read the line table if it has to be read separately.
1324 This is only used by xcoffread.c. */
1325 if (objfile
->sf
->sym_read_linetable
!= NULL
)
1326 objfile
->sf
->sym_read_linetable (objfile
);
1328 /* Handle the case where the debug info specifies a different path
1329 for the main source file. It can cause us to lose track of its
1330 line number information. */
1331 watch_main_source_file_lossage ();
1333 /* Now create the symtab objects proper, if not already done,
1334 one for each subfile. */
1336 for (subfile
= buildsym_compunit
->subfiles
;
1338 subfile
= subfile
->next
)
1340 int linetablesize
= 0;
1342 if (subfile
->line_vector
)
1344 linetablesize
= sizeof (struct linetable
) +
1345 subfile
->line_vector
->nitems
* sizeof (struct linetable_entry
);
1347 /* Like the pending blocks, the line table may be
1348 scrambled in reordered executables. Sort it if
1349 OBJF_REORDERED is true. */
1350 if (objfile
->flags
& OBJF_REORDERED
)
1351 qsort (subfile
->line_vector
->item
,
1352 subfile
->line_vector
->nitems
,
1353 sizeof (struct linetable_entry
), compare_line_numbers
);
1356 /* Allocate a symbol table if necessary. */
1357 if (subfile
->symtab
== NULL
)
1358 subfile
->symtab
= allocate_symtab (cu
, subfile
->name
);
1359 symtab
= subfile
->symtab
;
1361 /* Fill in its components. */
1363 if (subfile
->line_vector
)
1365 /* Reallocate the line table on the symbol obstack. */
1366 SYMTAB_LINETABLE (symtab
) = (struct linetable
*)
1367 obstack_alloc (&objfile
->objfile_obstack
, linetablesize
);
1368 memcpy (SYMTAB_LINETABLE (symtab
), subfile
->line_vector
,
1373 SYMTAB_LINETABLE (symtab
) = NULL
;
1376 /* Use whatever language we have been using for this
1377 subfile, not the one that was deduced in allocate_symtab
1378 from the filename. We already did our own deducing when
1379 we created the subfile, and we may have altered our
1380 opinion of what language it is from things we found in
1382 symtab
->language
= subfile
->language
;
1385 /* Make sure the symtab of main_subfile is the first in its list. */
1387 struct symtab
*main_symtab
, *prev_symtab
;
1389 main_symtab
= buildsym_compunit
->main_subfile
->symtab
;
1391 ALL_COMPUNIT_FILETABS (cu
, symtab
)
1393 if (symtab
== main_symtab
)
1395 if (prev_symtab
!= NULL
)
1397 prev_symtab
->next
= main_symtab
->next
;
1398 main_symtab
->next
= COMPUNIT_FILETABS (cu
);
1399 COMPUNIT_FILETABS (cu
) = main_symtab
;
1403 prev_symtab
= symtab
;
1405 gdb_assert (main_symtab
== COMPUNIT_FILETABS (cu
));
1408 /* Fill out the compunit symtab. */
1410 if (buildsym_compunit
->comp_dir
!= NULL
)
1412 /* Reallocate the dirname on the symbol obstack. */
1413 const char *comp_dir
= buildsym_compunit
->comp_dir
.get ();
1414 COMPUNIT_DIRNAME (cu
)
1415 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
1416 comp_dir
, strlen (comp_dir
));
1419 /* Save the debug format string (if any) in the symtab. */
1420 COMPUNIT_DEBUGFORMAT (cu
) = buildsym_compunit
->debugformat
;
1422 /* Similarly for the producer. */
1423 COMPUNIT_PRODUCER (cu
) = buildsym_compunit
->producer
;
1425 COMPUNIT_BLOCKVECTOR (cu
) = blockvector
;
1427 struct block
*b
= BLOCKVECTOR_BLOCK (blockvector
, GLOBAL_BLOCK
);
1429 set_block_compunit_symtab (b
, cu
);
1432 COMPUNIT_BLOCK_LINE_SECTION (cu
) = section
;
1434 COMPUNIT_MACRO_TABLE (cu
) = buildsym_compunit
->release_macros ();
1436 /* Default any symbols without a specified symtab to the primary symtab. */
1440 /* The main source file's symtab. */
1441 symtab
= COMPUNIT_FILETABS (cu
);
1443 for (block_i
= 0; block_i
< BLOCKVECTOR_NBLOCKS (blockvector
); block_i
++)
1445 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, block_i
);
1447 struct dict_iterator iter
;
1449 /* Inlined functions may have symbols not in the global or
1450 static symbol lists. */
1451 if (BLOCK_FUNCTION (block
) != NULL
)
1452 if (symbol_symtab (BLOCK_FUNCTION (block
)) == NULL
)
1453 symbol_set_symtab (BLOCK_FUNCTION (block
), symtab
);
1455 /* Note that we only want to fix up symbols from the local
1456 blocks, not blocks coming from included symtabs. That is why
1457 we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */
1458 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
1459 if (symbol_symtab (sym
) == NULL
)
1460 symbol_set_symtab (sym
, symtab
);
1464 add_compunit_symtab_to_objfile (cu
);
1469 /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK
1470 as value returned by end_symtab_get_static_block.
1472 SECTION is the same as for end_symtab: the section number
1473 (in objfile->section_offsets) of the blockvector and linetable.
1475 If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made
1478 struct compunit_symtab
*
1479 end_symtab_from_static_block (struct block
*static_block
,
1480 int section
, int expandable
)
1482 struct compunit_symtab
*cu
;
1484 if (static_block
== NULL
)
1486 /* Handle the "no blockvector" case.
1487 When this happens there is nothing to record, so there's nothing
1488 to do: memory will be freed up later.
1490 Note: We won't be adding a compunit to the objfile's list of
1491 compunits, so there's nothing to unchain. However, since each symtab
1492 is added to the objfile's obstack we can't free that space.
1493 We could do better, but this is believed to be a sufficiently rare
1498 cu
= end_symtab_with_blockvector (static_block
, section
, expandable
);
1500 reset_symtab_globals ();
1505 /* Finish the symbol definitions for one main source file, close off
1506 all the lexical contexts for that file (creating struct block's for
1507 them), then make the struct symtab for that file and put it in the
1510 END_ADDR is the address of the end of the file's text. SECTION is
1511 the section number (in objfile->section_offsets) of the blockvector
1514 Note that it is possible for end_symtab() to return NULL. In
1515 particular, for the DWARF case at least, it will return NULL when
1516 it finds a compilation unit that has exactly one DIE, a
1517 TAG_compile_unit DIE. This can happen when we link in an object
1518 file that was compiled from an empty source file. Returning NULL
1519 is probably not the correct thing to do, because then gdb will
1520 never know about this empty file (FIXME).
1522 If you need to modify STATIC_BLOCK before it is finalized you should
1523 call end_symtab_get_static_block and end_symtab_from_static_block
1526 struct compunit_symtab
*
1527 end_symtab (CORE_ADDR end_addr
, int section
)
1529 struct block
*static_block
;
1531 static_block
= end_symtab_get_static_block (end_addr
, 0, 0);
1532 return end_symtab_from_static_block (static_block
, section
, 0);
1535 /* Same as end_symtab except create a symtab that can be later added to. */
1537 struct compunit_symtab
*
1538 end_expandable_symtab (CORE_ADDR end_addr
, int section
)
1540 struct block
*static_block
;
1542 static_block
= end_symtab_get_static_block (end_addr
, 1, 0);
1543 return end_symtab_from_static_block (static_block
, section
, 1);
1546 /* Subroutine of augment_type_symtab to simplify it.
1547 Attach the main source file's symtab to all symbols in PENDING_LIST that
1551 set_missing_symtab (struct pending
*pending_list
,
1552 struct compunit_symtab
*cu
)
1554 struct pending
*pending
;
1557 for (pending
= pending_list
; pending
!= NULL
; pending
= pending
->next
)
1559 for (i
= 0; i
< pending
->nsyms
; ++i
)
1561 if (symbol_symtab (pending
->symbol
[i
]) == NULL
)
1562 symbol_set_symtab (pending
->symbol
[i
], COMPUNIT_FILETABS (cu
));
1567 /* Same as end_symtab, but for the case where we're adding more symbols
1568 to an existing symtab that is known to contain only type information.
1569 This is the case for DWARF4 Type Units. */
1572 augment_type_symtab (void)
1574 struct compunit_symtab
*cust
= buildsym_compunit
->compunit_symtab
;
1575 const struct blockvector
*blockvector
= COMPUNIT_BLOCKVECTOR (cust
);
1577 if (!buildsym_compunit
->m_context_stack
.empty ())
1578 complaint (_("Context stack not empty in augment_type_symtab"));
1579 if (pending_blocks
!= NULL
)
1580 complaint (_("Blocks in a type symtab"));
1581 if (buildsym_compunit
->m_pending_macros
!= NULL
)
1582 complaint (_("Macro in a type symtab"));
1583 if (buildsym_compunit
->m_have_line_numbers
)
1584 complaint (_("Line numbers recorded in a type symtab"));
1586 if (file_symbols
!= NULL
)
1588 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, STATIC_BLOCK
);
1590 /* First mark any symbols without a specified symtab as belonging
1591 to the primary symtab. */
1592 set_missing_symtab (file_symbols
, cust
);
1594 dict_add_pending (BLOCK_DICT (block
), file_symbols
);
1597 if (global_symbols
!= NULL
)
1599 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, GLOBAL_BLOCK
);
1601 /* First mark any symbols without a specified symtab as belonging
1602 to the primary symtab. */
1603 set_missing_symtab (global_symbols
, cust
);
1605 dict_add_pending (BLOCK_DICT (block
), global_symbols
);
1608 reset_symtab_globals ();
1611 /* Push a context block. Args are an identifying nesting level
1612 (checkable when you pop it), and the starting PC address of this
1615 struct context_stack
*
1616 push_context (int desc
, CORE_ADDR valu
)
1618 gdb_assert (buildsym_compunit
!= nullptr);
1620 buildsym_compunit
->m_context_stack
.emplace_back ();
1621 struct context_stack
*newobj
= &buildsym_compunit
->m_context_stack
.back ();
1623 newobj
->depth
= desc
;
1624 newobj
->locals
= local_symbols
;
1625 newobj
->old_blocks
= pending_blocks
;
1626 newobj
->start_addr
= valu
;
1627 newobj
->local_using_directives
1628 = buildsym_compunit
->m_local_using_directives
;
1629 newobj
->name
= NULL
;
1631 local_symbols
= NULL
;
1632 buildsym_compunit
->m_local_using_directives
= NULL
;
1637 /* Pop a context block. Returns the address of the context block just
1640 struct context_stack
1643 gdb_assert (buildsym_compunit
!= nullptr);
1644 gdb_assert (!buildsym_compunit
->m_context_stack
.empty ());
1645 struct context_stack result
= buildsym_compunit
->m_context_stack
.back ();
1646 buildsym_compunit
->m_context_stack
.pop_back ();
1653 record_debugformat (const char *format
)
1655 buildsym_compunit
->debugformat
= format
;
1659 record_producer (const char *producer
)
1661 buildsym_compunit
->producer
= producer
;
1666 /* See buildsym.h. */
1669 set_last_source_file (const char *name
)
1671 gdb_assert (buildsym_compunit
!= nullptr || name
== nullptr);
1672 if (buildsym_compunit
!= nullptr)
1673 buildsym_compunit
->set_last_source_file (name
);
1676 /* See buildsym.h. */
1679 get_last_source_file (void)
1681 if (buildsym_compunit
== nullptr)
1683 return buildsym_compunit
->m_last_source_file
.get ();
1686 /* See buildsym.h. */
1689 set_last_source_start_addr (CORE_ADDR addr
)
1691 gdb_assert (buildsym_compunit
!= nullptr);
1692 buildsym_compunit
->m_last_source_start_addr
= addr
;
1695 /* See buildsym.h. */
1698 get_last_source_start_addr ()
1700 gdb_assert (buildsym_compunit
!= nullptr);
1701 return buildsym_compunit
->m_last_source_start_addr
;
1704 /* See buildsym.h. */
1706 struct using_direct
**
1707 get_local_using_directives ()
1709 gdb_assert (buildsym_compunit
!= nullptr);
1710 return &buildsym_compunit
->m_local_using_directives
;
1713 /* See buildsym.h. */
1716 set_local_using_directives (struct using_direct
*new_local
)
1718 gdb_assert (buildsym_compunit
!= nullptr);
1719 buildsym_compunit
->m_local_using_directives
= new_local
;
1722 /* See buildsym.h. */
1724 struct using_direct
**
1725 get_global_using_directives ()
1727 gdb_assert (buildsym_compunit
!= nullptr);
1728 return &buildsym_compunit
->m_global_using_directives
;
1731 /* See buildsym.h. */
1734 outermost_context_p ()
1736 gdb_assert (buildsym_compunit
!= nullptr);
1737 return buildsym_compunit
->m_context_stack
.empty ();
1740 /* See buildsym.h. */
1742 struct context_stack
*
1743 get_current_context_stack ()
1745 gdb_assert (buildsym_compunit
!= nullptr);
1746 if (buildsym_compunit
->m_context_stack
.empty ())
1748 return &buildsym_compunit
->m_context_stack
.back ();
1751 /* See buildsym.h. */
1754 get_context_stack_depth ()
1756 gdb_assert (buildsym_compunit
!= nullptr);
1757 return buildsym_compunit
->m_context_stack
.size ();
1760 /* See buildsym.h. */
1763 get_current_subfile ()
1765 gdb_assert (buildsym_compunit
!= nullptr);
1766 return buildsym_compunit
->m_current_subfile
;
1771 /* Initialize anything that needs initializing when starting to read a
1772 fresh piece of a symbol file, e.g. reading in the stuff
1773 corresponding to a psymtab. */
1778 pending_addrmap_interesting
= 0;
1780 /* Ensure the scoped_free_pendings destructor was called after
1782 gdb_assert (free_pendings
== NULL
);
1783 gdb_assert (pending_blocks
== NULL
);
1784 gdb_assert (file_symbols
== NULL
);
1785 gdb_assert (global_symbols
== NULL
);
1786 gdb_assert (pending_addrmap
== NULL
);
1787 gdb_assert (buildsym_compunit
== NULL
);