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);
135 struct pending *next, *next1;
137 for (next = m_file_symbols; next != NULL; next = next1)
140 xfree ((void *) next);
143 for (next = m_global_symbols; next != NULL; next = next1)
146 xfree ((void *) next);
150 void set_last_source_file (const char *name)
152 char *new_name = name == NULL ? NULL : xstrdup (name);
153 m_last_source_file.reset (new_name);
156 struct macro_table *get_macro_table ()
158 if (m_pending_macros == nullptr)
159 m_pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack,
160 objfile->per_bfd->macro_cache,
162 return m_pending_macros;
165 struct macro_table *release_macros ()
167 struct macro_table *result = m_pending_macros;
168 m_pending_macros = nullptr;
172 /* This function is called to discard any pending blocks. */
174 void free_pending_blocks ()
176 m_pending_block_obstack.clear ();
177 m_pending_blocks = nullptr;
180 /* The objfile we're reading debug info from. */
181 struct objfile *objfile;
183 /* List of subfiles (source files).
184 Files are added to the front of the list.
185 This is important mostly for the language determination hacks we use,
186 which iterate over previously added files. */
187 struct subfile *subfiles = nullptr;
189 /* The subfile of the main source file. */
190 struct subfile *main_subfile = nullptr;
192 /* Name of source file whose symbol data we are now processing. This
193 comes from a symbol of type N_SO for stabs. For DWARF it comes
194 from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */
195 gdb::unique_xmalloc_ptr<char> m_last_source_file;
197 /* E.g., DW_AT_comp_dir if DWARF. Space for this is malloc'd. */
198 gdb::unique_xmalloc_ptr<char> comp_dir;
200 /* Space for this is not malloc'd, and is assumed to have at least
201 the same lifetime as objfile. */
202 const char *producer = nullptr;
204 /* Space for this is not malloc'd, and is assumed to have at least
205 the same lifetime as objfile. */
206 const char *debugformat = nullptr;
208 /* The compunit we are building. */
209 struct compunit_symtab *compunit_symtab = nullptr;
211 /* Language of this compunit_symtab. */
212 enum language language;
214 /* The macro table for the compilation unit whose symbols we're
215 currently reading. */
216 struct macro_table *m_pending_macros = nullptr;
218 /* True if symtab has line number info. This prevents an otherwise
219 empty symtab from being tossed. */
220 bool m_have_line_numbers = false;
222 /* Core address of start of text of current source file. This too
223 comes from the N_SO symbol. For Dwarf it typically comes from the
224 DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE. */
225 CORE_ADDR m_last_source_start_addr;
227 /* Stack of subfile names. */
228 std::vector<const char *> m_subfile_stack;
230 /* The "using" directives local to lexical context. */
231 struct using_direct *m_local_using_directives = nullptr;
233 /* Global "using" directives. */
234 struct using_direct *m_global_using_directives = nullptr;
236 /* The stack of contexts that are pushed by push_context and popped
238 std::vector<struct context_stack> m_context_stack;
240 struct subfile *m_current_subfile = nullptr;
242 /* The mutable address map for the compilation unit whose symbols
243 we're currently reading. The symtabs' shared blockvector will
244 point to a fixed copy of this. */
245 struct addrmap *m_pending_addrmap = nullptr;
247 /* The obstack on which we allocate pending_addrmap.
248 If pending_addrmap is NULL, this is uninitialized; otherwise, it is
249 initialized (and holds pending_addrmap). */
250 auto_obstack m_pending_addrmap_obstack;
252 /* True if we recorded any ranges in the addrmap that are different
253 from those in the blockvector already. We set this to false when
254 we start processing a symfile, and if it's still false at the
255 end, then we just toss the addrmap. */
256 bool m_pending_addrmap_interesting = false;
258 /* An obstack used for allocating pending blocks. */
259 auto_obstack m_pending_block_obstack;
261 /* Pointer to the head of a linked list of symbol blocks which have
262 already been finalized (lexical contexts already closed) and which
263 are just waiting to be built into a blockvector when finalizing the
264 associated symtab. */
265 struct pending_block *m_pending_blocks = nullptr;
267 /* Pending static symbols and types at the top level. */
268 struct pending *m_file_symbols = nullptr;
270 /* Pending global functions and variables. */
271 struct pending *m_global_symbols = nullptr;
273 /* Pending symbols that are local to the lexical context. */
274 struct pending *m_local_symbols = nullptr;
277 /* The work-in-progress of the compunit we are building.
278 This is created first, before any subfiles by start_symtab. */
280 static struct buildsym_compunit *buildsym_compunit;
282 /* List of blocks already made (lexical contexts already closed).
283 This is used at the end to make the blockvector. */
287 struct pending_block *next;
291 static void free_buildsym_compunit (void);
293 static int compare_line_numbers (const void *ln1p, const void *ln2p);
295 static void record_pending_block (struct objfile *objfile,
297 struct pending_block *opblock);
299 /* Initial sizes of data structures. These are realloc'd larger if
300 needed, and realloc'd down to the size actually used, when
303 #define INITIAL_LINE_VECTOR_LENGTH 1000
306 /* Maintain the lists of symbols and blocks. */
308 /* Add a symbol to one of the lists of symbols. */
311 add_symbol_to_list (struct symbol *symbol, struct pending **listhead)
313 struct pending *link;
315 /* If this is an alias for another symbol, don't add it. */
316 if (symbol->ginfo.name && symbol->ginfo.name[0] == '#')
319 /* We keep PENDINGSIZE symbols in each link of the list. If we
320 don't have a link with room in it, add a new link. */
321 if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE)
323 link = XNEW (struct pending);
324 link->next = *listhead;
329 (*listhead)->symbol[(*listhead)->nsyms++] = symbol;
332 /* Find a symbol named NAME on a LIST. NAME need not be
333 '\0'-terminated; LENGTH is the length of the name. */
336 find_symbol_in_list (struct pending *list, char *name, int length)
343 for (j = list->nsyms; --j >= 0;)
345 pp = SYMBOL_LINKAGE_NAME (list->symbol[j]);
346 if (*pp == *name && strncmp (pp, name, length) == 0
347 && pp[length] == '\0')
349 return (list->symbol[j]);
357 /* At end of reading syms, or in case of quit, ensure everything
358 associated with building symtabs is freed.
360 N.B. This is *not* intended to be used when building psymtabs. Some debug
361 info readers call this anyway, which is harmless if confusing. */
363 scoped_free_pendings::~scoped_free_pendings ()
365 free_buildsym_compunit ();
368 /* Take one of the lists of symbols and make a block from it. Keep
369 the order the symbols have in the list (reversed from the input
370 file). Put the block on the list of pending blocks. */
372 static struct block *
373 finish_block_internal (struct symbol *symbol,
374 struct pending **listhead,
375 struct pending_block *old_blocks,
376 const struct dynamic_prop *static_link,
377 CORE_ADDR start, CORE_ADDR end,
378 int is_global, int expandable)
380 struct objfile *objfile = buildsym_compunit->objfile;
381 struct gdbarch *gdbarch = get_objfile_arch (objfile);
382 struct pending *next, *next1;
384 struct pending_block *pblock;
385 struct pending_block *opblock;
388 ? allocate_global_block (&objfile->objfile_obstack)
389 : allocate_block (&objfile->objfile_obstack));
394 = dict_create_linear (&objfile->objfile_obstack,
395 buildsym_compunit->language, *listhead);
402 = dict_create_hashed_expandable (buildsym_compunit->language);
403 dict_add_pending (BLOCK_DICT (block), *listhead);
408 dict_create_hashed (&objfile->objfile_obstack,
409 buildsym_compunit->language, *listhead);
413 BLOCK_START (block) = start;
414 BLOCK_END (block) = end;
416 /* Put the block in as the value of the symbol that names it. */
420 struct type *ftype = SYMBOL_TYPE (symbol);
421 struct dict_iterator iter;
422 SYMBOL_BLOCK_VALUE (symbol) = block;
423 BLOCK_FUNCTION (block) = symbol;
425 if (TYPE_NFIELDS (ftype) <= 0)
427 /* No parameter type information is recorded with the
428 function's type. Set that from the type of the
429 parameter symbols. */
430 int nparams = 0, iparams;
433 /* Here we want to directly access the dictionary, because
434 we haven't fully initialized the block yet. */
435 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
437 if (SYMBOL_IS_ARGUMENT (sym))
442 TYPE_NFIELDS (ftype) = nparams;
443 TYPE_FIELDS (ftype) = (struct field *)
444 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
447 /* Here we want to directly access the dictionary, because
448 we haven't fully initialized the block yet. */
449 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
451 if (iparams == nparams)
454 if (SYMBOL_IS_ARGUMENT (sym))
456 TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym);
457 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
466 BLOCK_FUNCTION (block) = NULL;
469 if (static_link != NULL)
470 objfile_register_static_link (objfile, block, static_link);
472 /* Now free the links of the list, and empty the list. */
474 for (next = *listhead; next; next = next1)
481 /* Check to be sure that the blocks have an end address that is
482 greater than starting address. */
484 if (BLOCK_END (block) < BLOCK_START (block))
488 complaint (_("block end address less than block "
489 "start address in %s (patched it)"),
490 SYMBOL_PRINT_NAME (symbol));
494 complaint (_("block end address %s less than block "
495 "start address %s (patched it)"),
496 paddress (gdbarch, BLOCK_END (block)),
497 paddress (gdbarch, BLOCK_START (block)));
499 /* Better than nothing. */
500 BLOCK_END (block) = BLOCK_START (block);
503 /* Install this block as the superblock of all blocks made since the
504 start of this scope that don't have superblocks yet. */
507 for (pblock = buildsym_compunit->m_pending_blocks;
508 pblock && pblock != old_blocks;
509 pblock = pblock->next)
511 if (BLOCK_SUPERBLOCK (pblock->block) == NULL)
513 /* Check to be sure the blocks are nested as we receive
514 them. If the compiler/assembler/linker work, this just
515 burns a small amount of time.
517 Skip blocks which correspond to a function; they're not
518 physically nested inside this other blocks, only
520 if (BLOCK_FUNCTION (pblock->block) == NULL
521 && (BLOCK_START (pblock->block) < BLOCK_START (block)
522 || BLOCK_END (pblock->block) > BLOCK_END (block)))
526 complaint (_("inner block not inside outer block in %s"),
527 SYMBOL_PRINT_NAME (symbol));
531 complaint (_("inner block (%s-%s) not "
532 "inside outer block (%s-%s)"),
533 paddress (gdbarch, BLOCK_START (pblock->block)),
534 paddress (gdbarch, BLOCK_END (pblock->block)),
535 paddress (gdbarch, BLOCK_START (block)),
536 paddress (gdbarch, BLOCK_END (block)));
538 if (BLOCK_START (pblock->block) < BLOCK_START (block))
539 BLOCK_START (pblock->block) = BLOCK_START (block);
540 if (BLOCK_END (pblock->block) > BLOCK_END (block))
541 BLOCK_END (pblock->block) = BLOCK_END (block);
543 BLOCK_SUPERBLOCK (pblock->block) = block;
548 block_set_using (block,
550 ? buildsym_compunit->m_global_using_directives
551 : buildsym_compunit->m_local_using_directives),
552 &objfile->objfile_obstack);
554 buildsym_compunit->m_global_using_directives = NULL;
556 buildsym_compunit->m_local_using_directives = NULL;
558 record_pending_block (objfile, block, opblock);
564 finish_block (struct symbol *symbol,
565 struct pending_block *old_blocks,
566 const struct dynamic_prop *static_link,
567 CORE_ADDR start, CORE_ADDR end)
569 return finish_block_internal (symbol, &buildsym_compunit->m_local_symbols,
570 old_blocks, static_link,
574 /* Record BLOCK on the list of all blocks in the file. Put it after
575 OPBLOCK, or at the beginning if opblock is NULL. This puts the
576 block in the list after all its subblocks.
578 Allocate the pending block struct in the objfile_obstack to save
579 time. This wastes a little space. FIXME: Is it worth it? */
582 record_pending_block (struct objfile *objfile, struct block *block,
583 struct pending_block *opblock)
585 struct pending_block *pblock;
587 pblock = XOBNEW (&buildsym_compunit->m_pending_block_obstack,
588 struct pending_block);
589 pblock->block = block;
592 pblock->next = opblock->next;
593 opblock->next = pblock;
597 pblock->next = buildsym_compunit->m_pending_blocks;
598 buildsym_compunit->m_pending_blocks = pblock;
603 /* Record that the range of addresses from START to END_INCLUSIVE
604 (inclusive, like it says) belongs to BLOCK. BLOCK's start and end
605 addresses must be set already. You must apply this function to all
606 BLOCK's children before applying it to BLOCK.
608 If a call to this function complicates the picture beyond that
609 already provided by BLOCK_START and BLOCK_END, then we create an
610 address map for the block. */
612 record_block_range (struct block *block,
613 CORE_ADDR start, CORE_ADDR end_inclusive)
615 /* If this is any different from the range recorded in the block's
616 own BLOCK_START and BLOCK_END, then note that the address map has
617 become interesting. Note that even if this block doesn't have
618 any "interesting" ranges, some later block might, so we still
619 need to record this block in the addrmap. */
620 if (start != BLOCK_START (block)
621 || end_inclusive + 1 != BLOCK_END (block))
622 buildsym_compunit->m_pending_addrmap_interesting = true;
624 if (buildsym_compunit->m_pending_addrmap == nullptr)
625 buildsym_compunit->m_pending_addrmap
626 = addrmap_create_mutable (&buildsym_compunit->m_pending_addrmap_obstack);
628 addrmap_set_empty (buildsym_compunit->m_pending_addrmap,
629 start, end_inclusive, block);
632 static struct blockvector *
633 make_blockvector (void)
635 struct objfile *objfile = buildsym_compunit->objfile;
636 struct pending_block *next;
637 struct blockvector *blockvector;
640 /* Count the length of the list of blocks. */
642 for (next = buildsym_compunit->m_pending_blocks, i = 0;
644 next = next->next, i++)
648 blockvector = (struct blockvector *)
649 obstack_alloc (&objfile->objfile_obstack,
650 (sizeof (struct blockvector)
651 + (i - 1) * sizeof (struct block *)));
653 /* Copy the blocks into the blockvector. This is done in reverse
654 order, which happens to put the blocks into the proper order
655 (ascending starting address). finish_block has hair to insert
656 each block into the list after its subblocks in order to make
657 sure this is true. */
659 BLOCKVECTOR_NBLOCKS (blockvector) = i;
660 for (next = buildsym_compunit->m_pending_blocks; next; next = next->next)
662 BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
665 buildsym_compunit->free_pending_blocks ();
667 /* If we needed an address map for this symtab, record it in the
669 if (buildsym_compunit->m_pending_addrmap != nullptr
670 && buildsym_compunit->m_pending_addrmap_interesting)
671 BLOCKVECTOR_MAP (blockvector)
672 = addrmap_create_fixed (buildsym_compunit->m_pending_addrmap,
673 &objfile->objfile_obstack);
675 BLOCKVECTOR_MAP (blockvector) = 0;
677 /* Some compilers output blocks in the wrong order, but we depend on
678 their being in the right order so we can binary search. Check the
679 order and moan about it.
680 Note: Remember that the first two blocks are the global and static
681 blocks. We could special case that fact and begin checking at block 2.
682 To avoid making that assumption we do not. */
683 if (BLOCKVECTOR_NBLOCKS (blockvector) > 1)
685 for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++)
687 if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i - 1))
688 > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i)))
691 = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i));
693 complaint (_("block at %s out of order"),
694 hex_string ((LONGEST) start));
699 return (blockvector);
702 /* Start recording information about source code that came from an
703 included (or otherwise merged-in) source file with a different
704 name. NAME is the name of the file (cannot be NULL). */
707 start_subfile (const char *name)
709 const char *subfile_dirname;
710 struct subfile *subfile;
712 gdb_assert (buildsym_compunit != NULL);
714 subfile_dirname = buildsym_compunit->comp_dir.get ();
716 /* See if this subfile is already registered. */
718 for (subfile = buildsym_compunit->subfiles; subfile; subfile = subfile->next)
722 /* If NAME is an absolute path, and this subfile is not, then
723 attempt to create an absolute path to compare. */
724 if (IS_ABSOLUTE_PATH (name)
725 && !IS_ABSOLUTE_PATH (subfile->name)
726 && subfile_dirname != NULL)
727 subfile_name = concat (subfile_dirname, SLASH_STRING,
728 subfile->name, (char *) NULL);
730 subfile_name = subfile->name;
732 if (FILENAME_CMP (subfile_name, name) == 0)
734 buildsym_compunit->m_current_subfile = subfile;
735 if (subfile_name != subfile->name)
736 xfree (subfile_name);
739 if (subfile_name != subfile->name)
740 xfree (subfile_name);
743 /* This subfile is not known. Add an entry for it. */
745 subfile = XNEW (struct subfile);
746 memset (subfile, 0, sizeof (struct subfile));
747 subfile->buildsym_compunit = buildsym_compunit;
749 subfile->next = buildsym_compunit->subfiles;
750 buildsym_compunit->subfiles = subfile;
752 buildsym_compunit->m_current_subfile = subfile;
754 subfile->name = xstrdup (name);
756 /* Initialize line-number recording for this subfile. */
757 subfile->line_vector = NULL;
759 /* Default the source language to whatever can be deduced from the
760 filename. If nothing can be deduced (such as for a C/C++ include
761 file with a ".h" extension), then inherit whatever language the
762 previous subfile had. This kludgery is necessary because there
763 is no standard way in some object formats to record the source
764 language. Also, when symtabs are allocated we try to deduce a
765 language then as well, but it is too late for us to use that
766 information while reading symbols, since symtabs aren't allocated
767 until after all the symbols have been processed for a given
770 subfile->language = deduce_language_from_filename (subfile->name);
771 if (subfile->language == language_unknown
772 && subfile->next != NULL)
774 subfile->language = subfile->next->language;
777 /* If the filename of this subfile ends in .C, then change the
778 language of any pending subfiles from C to C++. We also accept
779 any other C++ suffixes accepted by deduce_language_from_filename. */
780 /* Likewise for f2c. */
785 enum language sublang = deduce_language_from_filename (subfile->name);
787 if (sublang == language_cplus || sublang == language_fortran)
788 for (s = buildsym_compunit->subfiles; s != NULL; s = s->next)
789 if (s->language == language_c)
790 s->language = sublang;
793 /* And patch up this file if necessary. */
794 if (subfile->language == language_c
795 && subfile->next != NULL
796 && (subfile->next->language == language_cplus
797 || subfile->next->language == language_fortran))
799 subfile->language = subfile->next->language;
803 /* Delete the buildsym compunit. */
806 free_buildsym_compunit (void)
808 if (buildsym_compunit == NULL)
810 delete buildsym_compunit;
811 buildsym_compunit = NULL;
814 /* For stabs readers, the first N_SO symbol is assumed to be the
815 source file name, and the subfile struct is initialized using that
816 assumption. If another N_SO symbol is later seen, immediately
817 following the first one, then the first one is assumed to be the
818 directory name and the second one is really the source file name.
820 So we have to patch up the subfile struct by moving the old name
821 value to dirname and remembering the new name. Some sanity
822 checking is performed to ensure that the state of the subfile
823 struct is reasonable and that the old name we are assuming to be a
824 directory name actually is (by checking for a trailing '/'). */
827 patch_subfile_names (struct subfile *subfile, const char *name)
830 && buildsym_compunit->comp_dir == NULL
831 && subfile->name != NULL
832 && IS_DIR_SEPARATOR (subfile->name[strlen (subfile->name) - 1]))
834 buildsym_compunit->comp_dir.reset (subfile->name);
835 subfile->name = xstrdup (name);
836 set_last_source_file (name);
838 /* Default the source language to whatever can be deduced from
839 the filename. If nothing can be deduced (such as for a C/C++
840 include file with a ".h" extension), then inherit whatever
841 language the previous subfile had. This kludgery is
842 necessary because there is no standard way in some object
843 formats to record the source language. Also, when symtabs
844 are allocated we try to deduce a language then as well, but
845 it is too late for us to use that information while reading
846 symbols, since symtabs aren't allocated until after all the
847 symbols have been processed for a given source file. */
849 subfile->language = deduce_language_from_filename (subfile->name);
850 if (subfile->language == language_unknown
851 && subfile->next != NULL)
853 subfile->language = subfile->next->language;
858 /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for
859 switching source files (different subfiles, as we call them) within
860 one object file, but using a stack rather than in an arbitrary
866 gdb_assert (buildsym_compunit != nullptr);
867 gdb_assert (buildsym_compunit->m_current_subfile != NULL);
868 gdb_assert (buildsym_compunit->m_current_subfile->name != NULL);
869 buildsym_compunit->m_subfile_stack.push_back
870 (buildsym_compunit->m_current_subfile->name);
876 gdb_assert (buildsym_compunit != nullptr);
877 gdb_assert (!buildsym_compunit->m_subfile_stack.empty ());
878 const char *name = buildsym_compunit->m_subfile_stack.back ();
879 buildsym_compunit->m_subfile_stack.pop_back ();
883 /* Add a linetable entry for line number LINE and address PC to the
884 line vector for SUBFILE. */
887 record_line (struct subfile *subfile, int line, CORE_ADDR pc)
889 struct linetable_entry *e;
891 /* Ignore the dummy line number in libg.o */
897 /* Make sure line vector exists and is big enough. */
898 if (!subfile->line_vector)
900 subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH;
901 subfile->line_vector = (struct linetable *)
902 xmalloc (sizeof (struct linetable)
903 + subfile->line_vector_length * sizeof (struct linetable_entry));
904 subfile->line_vector->nitems = 0;
905 buildsym_compunit->m_have_line_numbers = true;
908 if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length)
910 subfile->line_vector_length *= 2;
911 subfile->line_vector = (struct linetable *)
912 xrealloc ((char *) subfile->line_vector,
913 (sizeof (struct linetable)
914 + (subfile->line_vector_length
915 * sizeof (struct linetable_entry))));
918 /* Normally, we treat lines as unsorted. But the end of sequence
919 marker is special. We sort line markers at the same PC by line
920 number, so end of sequence markers (which have line == 0) appear
921 first. This is right if the marker ends the previous function,
922 and there is no padding before the next function. But it is
923 wrong if the previous line was empty and we are now marking a
924 switch to a different subfile. We must leave the end of sequence
925 marker at the end of this group of lines, not sort the empty line
926 to after the marker. The easiest way to accomplish this is to
927 delete any empty lines from our table, if they are followed by
928 end of sequence markers. All we lose is the ability to set
929 breakpoints at some lines which contain no instructions
931 if (line == 0 && subfile->line_vector->nitems > 0)
933 e = subfile->line_vector->item + subfile->line_vector->nitems - 1;
934 while (subfile->line_vector->nitems > 0 && e->pc == pc)
937 subfile->line_vector->nitems--;
941 e = subfile->line_vector->item + subfile->line_vector->nitems++;
946 /* Needed in order to sort line tables from IBM xcoff files. Sigh! */
949 compare_line_numbers (const void *ln1p, const void *ln2p)
951 struct linetable_entry *ln1 = (struct linetable_entry *) ln1p;
952 struct linetable_entry *ln2 = (struct linetable_entry *) ln2p;
954 /* Note: this code does not assume that CORE_ADDRs can fit in ints.
955 Please keep it that way. */
956 if (ln1->pc < ln2->pc)
959 if (ln1->pc > ln2->pc)
962 /* If pc equal, sort by line. I'm not sure whether this is optimum
963 behavior (see comment at struct linetable in symtab.h). */
964 return ln1->line - ln2->line;
967 /* See buildsym.h. */
969 struct compunit_symtab *
970 buildsym_compunit_symtab (void)
972 gdb_assert (buildsym_compunit != NULL);
974 return buildsym_compunit->compunit_symtab;
977 /* See buildsym.h. */
980 get_macro_table (void)
982 struct objfile *objfile;
984 gdb_assert (buildsym_compunit != NULL);
985 return buildsym_compunit->get_macro_table ();
988 /* Init state to prepare for building a symtab.
989 Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c
990 can call start_symtab+end_symtab multiple times after one call to
994 prepare_for_building ()
996 /* These should have been reset either by successful completion of building
997 a symtab, or by the scoped_free_pendings destructor. */
998 gdb_assert (buildsym_compunit == nullptr);
1001 /* Start a new symtab for a new source file in OBJFILE. Called, for example,
1002 when a stabs symbol of type N_SO is seen, or when a DWARF
1003 TAG_compile_unit DIE is seen. It indicates the start of data for
1004 one original source file.
1006 NAME is the name of the file (cannot be NULL). COMP_DIR is the
1007 directory in which the file was compiled (or NULL if not known).
1008 START_ADDR is the lowest address of objects in the file (or 0 if
1009 not known). LANGUAGE is the language of the source file, or
1010 language_unknown if not known, in which case it'll be deduced from
1013 struct compunit_symtab *
1014 start_symtab (struct objfile *objfile, const char *name, const char *comp_dir,
1015 CORE_ADDR start_addr, enum language language)
1017 prepare_for_building ();
1019 buildsym_compunit = new struct buildsym_compunit (objfile, name, comp_dir,
1020 language, start_addr);
1022 /* Allocate the compunit symtab now. The caller needs it to allocate
1023 non-primary symtabs. It is also needed by get_macro_table. */
1024 buildsym_compunit->compunit_symtab = allocate_compunit_symtab (objfile,
1027 /* Build the subfile for NAME (the main source file) so that we can record
1028 a pointer to it for later.
1029 IMPORTANT: Do not allocate a struct symtab for NAME here.
1030 It can happen that the debug info provides a different path to NAME than
1031 DIRNAME,NAME. We cope with this in watch_main_source_file_lossage but
1032 that only works if the main_subfile doesn't have a symtab yet. */
1033 start_subfile (name);
1034 /* Save this so that we don't have to go looking for it at the end
1035 of the subfiles list. */
1036 buildsym_compunit->main_subfile = buildsym_compunit->m_current_subfile;
1038 return buildsym_compunit->compunit_symtab;
1041 /* Restart compilation for a symtab.
1042 CUST is the result of end_expandable_symtab.
1043 NAME, START_ADDR are the source file we are resuming with.
1045 This is used when a symtab is built from multiple sources.
1046 The symtab is first built with start_symtab/end_expandable_symtab
1047 and then for each additional piece call restart_symtab/augment_*_symtab.
1048 Note: At the moment there is only augment_type_symtab. */
1051 restart_symtab (struct compunit_symtab *cust,
1052 const char *name, CORE_ADDR start_addr)
1054 prepare_for_building ();
1057 = new struct buildsym_compunit (COMPUNIT_OBJFILE (cust),
1059 COMPUNIT_DIRNAME (cust),
1060 compunit_language (cust),
1062 buildsym_compunit->compunit_symtab = cust;
1065 /* Subroutine of end_symtab to simplify it. Look for a subfile that
1066 matches the main source file's basename. If there is only one, and
1067 if the main source file doesn't have any symbol or line number
1068 information, then copy this file's symtab and line_vector to the
1069 main source file's subfile and discard the other subfile. This can
1070 happen because of a compiler bug or from the user playing games
1071 with #line or from things like a distributed build system that
1072 manipulates the debug info. This can also happen from an innocent
1073 symlink in the paths, we don't canonicalize paths here. */
1076 watch_main_source_file_lossage (void)
1078 struct subfile *mainsub, *subfile;
1080 /* We have to watch for buildsym_compunit == NULL here. It's a quirk of
1081 end_symtab, it can return NULL so there may not be a main subfile. */
1082 if (buildsym_compunit == NULL)
1085 /* Get the main source file. */
1086 mainsub = buildsym_compunit->main_subfile;
1088 /* If the main source file doesn't have any line number or symbol
1089 info, look for an alias in another subfile. */
1091 if (mainsub->line_vector == NULL
1092 && mainsub->symtab == NULL)
1094 const char *mainbase = lbasename (mainsub->name);
1096 struct subfile *prevsub;
1097 struct subfile *mainsub_alias = NULL;
1098 struct subfile *prev_mainsub_alias = NULL;
1101 for (subfile = buildsym_compunit->subfiles;
1103 subfile = subfile->next)
1105 if (subfile == mainsub)
1107 if (filename_cmp (lbasename (subfile->name), mainbase) == 0)
1110 mainsub_alias = subfile;
1111 prev_mainsub_alias = prevsub;
1116 if (nr_matches == 1)
1118 gdb_assert (mainsub_alias != NULL && mainsub_alias != mainsub);
1120 /* Found a match for the main source file.
1121 Copy its line_vector and symtab to the main subfile
1122 and then discard it. */
1124 mainsub->line_vector = mainsub_alias->line_vector;
1125 mainsub->line_vector_length = mainsub_alias->line_vector_length;
1126 mainsub->symtab = mainsub_alias->symtab;
1128 if (prev_mainsub_alias == NULL)
1129 buildsym_compunit->subfiles = mainsub_alias->next;
1131 prev_mainsub_alias->next = mainsub_alias->next;
1132 xfree (mainsub_alias->name);
1133 xfree (mainsub_alias);
1138 /* Reset state after a successful building of a symtab.
1139 This exists because dbxread.c and xcoffread.c can call
1140 start_symtab+end_symtab multiple times after one call to buildsym_init,
1141 and before the scoped_free_pendings destructor is called.
1142 We keep the free_pendings list around for dbx/xcoff sake. */
1145 reset_symtab_globals (void)
1147 free_buildsym_compunit ();
1150 /* Implementation of the first part of end_symtab. It allows modifying
1151 STATIC_BLOCK before it gets finalized by end_symtab_from_static_block.
1152 If the returned value is NULL there is no blockvector created for
1153 this symtab (you still must call end_symtab_from_static_block).
1155 END_ADDR is the same as for end_symtab: the address of the end of the
1158 If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made
1161 If REQUIRED is non-zero, then a symtab is created even if it does
1162 not contain any symbols. */
1165 end_symtab_get_static_block (CORE_ADDR end_addr, int expandable, int required)
1167 struct objfile *objfile = buildsym_compunit->objfile;
1169 /* Finish the lexical context of the last function in the file; pop
1170 the context stack. */
1172 if (!buildsym_compunit->m_context_stack.empty ())
1174 struct context_stack cstk = pop_context ();
1176 /* Make a block for the local symbols within. */
1177 finish_block (cstk.name, cstk.old_blocks, NULL,
1178 cstk.start_addr, end_addr);
1180 if (!buildsym_compunit->m_context_stack.empty ())
1182 /* This is said to happen with SCO. The old coffread.c
1183 code simply emptied the context stack, so we do the
1184 same. FIXME: Find out why it is happening. This is not
1185 believed to happen in most cases (even for coffread.c);
1186 it used to be an abort(). */
1187 complaint (_("Context stack not empty in end_symtab"));
1188 buildsym_compunit->m_context_stack.clear ();
1192 /* Reordered executables may have out of order pending blocks; if
1193 OBJF_REORDERED is true, then sort the pending blocks. */
1195 if ((objfile->flags & OBJF_REORDERED) && buildsym_compunit->m_pending_blocks)
1197 struct pending_block *pb;
1199 std::vector<block *> barray;
1201 for (pb = buildsym_compunit->m_pending_blocks; pb != NULL; pb = pb->next)
1202 barray.push_back (pb->block);
1204 /* Sort blocks by start address in descending order. Blocks with the
1205 same start address must remain in the original order to preserve
1206 inline function caller/callee relationships. */
1207 std::stable_sort (barray.begin (), barray.end (),
1208 [] (const block *a, const block *b)
1210 return BLOCK_START (a) > BLOCK_START (b);
1214 for (pb = buildsym_compunit->m_pending_blocks; pb != NULL; pb = pb->next)
1215 pb->block = barray[i++];
1218 /* Cleanup any undefined types that have been left hanging around
1219 (this needs to be done before the finish_blocks so that
1220 file_symbols is still good).
1222 Both cleanup_undefined_stabs_types and finish_global_stabs are stabs
1223 specific, but harmless for other symbol readers, since on gdb
1224 startup or when finished reading stabs, the state is set so these
1225 are no-ops. FIXME: Is this handled right in case of QUIT? Can
1226 we make this cleaner? */
1228 cleanup_undefined_stabs_types (objfile);
1229 finish_global_stabs (objfile);
1232 && buildsym_compunit->m_pending_blocks == NULL
1233 && buildsym_compunit->m_file_symbols == NULL
1234 && buildsym_compunit->m_global_symbols == NULL
1235 && !buildsym_compunit->m_have_line_numbers
1236 && buildsym_compunit->m_pending_macros == NULL
1237 && buildsym_compunit->m_global_using_directives == NULL)
1239 /* Ignore symtabs that have no functions with real debugging info. */
1244 /* Define the STATIC_BLOCK. */
1245 return finish_block_internal (NULL, get_file_symbols (), NULL, NULL,
1246 buildsym_compunit->m_last_source_start_addr,
1247 end_addr, 0, expandable);
1251 /* Subroutine of end_symtab_from_static_block to simplify it.
1252 Handle the "have blockvector" case.
1253 See end_symtab_from_static_block for a description of the arguments. */
1255 static struct compunit_symtab *
1256 end_symtab_with_blockvector (struct block *static_block,
1257 int section, int expandable)
1259 struct objfile *objfile = buildsym_compunit->objfile;
1260 struct compunit_symtab *cu = buildsym_compunit->compunit_symtab;
1261 struct symtab *symtab;
1262 struct blockvector *blockvector;
1263 struct subfile *subfile;
1266 gdb_assert (static_block != NULL);
1267 gdb_assert (buildsym_compunit != NULL);
1268 gdb_assert (buildsym_compunit->subfiles != NULL);
1270 end_addr = BLOCK_END (static_block);
1272 /* Create the GLOBAL_BLOCK and build the blockvector. */
1273 finish_block_internal (NULL, get_global_symbols (), NULL, NULL,
1274 buildsym_compunit->m_last_source_start_addr, end_addr,
1276 blockvector = make_blockvector ();
1278 /* Read the line table if it has to be read separately.
1279 This is only used by xcoffread.c. */
1280 if (objfile->sf->sym_read_linetable != NULL)
1281 objfile->sf->sym_read_linetable (objfile);
1283 /* Handle the case where the debug info specifies a different path
1284 for the main source file. It can cause us to lose track of its
1285 line number information. */
1286 watch_main_source_file_lossage ();
1288 /* Now create the symtab objects proper, if not already done,
1289 one for each subfile. */
1291 for (subfile = buildsym_compunit->subfiles;
1293 subfile = subfile->next)
1295 int linetablesize = 0;
1297 if (subfile->line_vector)
1299 linetablesize = sizeof (struct linetable) +
1300 subfile->line_vector->nitems * sizeof (struct linetable_entry);
1302 /* Like the pending blocks, the line table may be
1303 scrambled in reordered executables. Sort it if
1304 OBJF_REORDERED is true. */
1305 if (objfile->flags & OBJF_REORDERED)
1306 qsort (subfile->line_vector->item,
1307 subfile->line_vector->nitems,
1308 sizeof (struct linetable_entry), compare_line_numbers);
1311 /* Allocate a symbol table if necessary. */
1312 if (subfile->symtab == NULL)
1313 subfile->symtab = allocate_symtab (cu, subfile->name);
1314 symtab = subfile->symtab;
1316 /* Fill in its components. */
1318 if (subfile->line_vector)
1320 /* Reallocate the line table on the symbol obstack. */
1321 SYMTAB_LINETABLE (symtab) = (struct linetable *)
1322 obstack_alloc (&objfile->objfile_obstack, linetablesize);
1323 memcpy (SYMTAB_LINETABLE (symtab), subfile->line_vector,
1328 SYMTAB_LINETABLE (symtab) = NULL;
1331 /* Use whatever language we have been using for this
1332 subfile, not the one that was deduced in allocate_symtab
1333 from the filename. We already did our own deducing when
1334 we created the subfile, and we may have altered our
1335 opinion of what language it is from things we found in
1337 symtab->language = subfile->language;
1340 /* Make sure the symtab of main_subfile is the first in its list. */
1342 struct symtab *main_symtab, *prev_symtab;
1344 main_symtab = buildsym_compunit->main_subfile->symtab;
1346 ALL_COMPUNIT_FILETABS (cu, symtab)
1348 if (symtab == main_symtab)
1350 if (prev_symtab != NULL)
1352 prev_symtab->next = main_symtab->next;
1353 main_symtab->next = COMPUNIT_FILETABS (cu);
1354 COMPUNIT_FILETABS (cu) = main_symtab;
1358 prev_symtab = symtab;
1360 gdb_assert (main_symtab == COMPUNIT_FILETABS (cu));
1363 /* Fill out the compunit symtab. */
1365 if (buildsym_compunit->comp_dir != NULL)
1367 /* Reallocate the dirname on the symbol obstack. */
1368 const char *comp_dir = buildsym_compunit->comp_dir.get ();
1369 COMPUNIT_DIRNAME (cu)
1370 = (const char *) obstack_copy0 (&objfile->objfile_obstack,
1371 comp_dir, strlen (comp_dir));
1374 /* Save the debug format string (if any) in the symtab. */
1375 COMPUNIT_DEBUGFORMAT (cu) = buildsym_compunit->debugformat;
1377 /* Similarly for the producer. */
1378 COMPUNIT_PRODUCER (cu) = buildsym_compunit->producer;
1380 COMPUNIT_BLOCKVECTOR (cu) = blockvector;
1382 struct block *b = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK);
1384 set_block_compunit_symtab (b, cu);
1387 COMPUNIT_BLOCK_LINE_SECTION (cu) = section;
1389 COMPUNIT_MACRO_TABLE (cu) = buildsym_compunit->release_macros ();
1391 /* Default any symbols without a specified symtab to the primary symtab. */
1395 /* The main source file's symtab. */
1396 symtab = COMPUNIT_FILETABS (cu);
1398 for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++)
1400 struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i);
1402 struct dict_iterator iter;
1404 /* Inlined functions may have symbols not in the global or
1405 static symbol lists. */
1406 if (BLOCK_FUNCTION (block) != NULL)
1407 if (symbol_symtab (BLOCK_FUNCTION (block)) == NULL)
1408 symbol_set_symtab (BLOCK_FUNCTION (block), symtab);
1410 /* Note that we only want to fix up symbols from the local
1411 blocks, not blocks coming from included symtabs. That is why
1412 we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */
1413 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
1414 if (symbol_symtab (sym) == NULL)
1415 symbol_set_symtab (sym, symtab);
1419 add_compunit_symtab_to_objfile (cu);
1424 /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK
1425 as value returned by end_symtab_get_static_block.
1427 SECTION is the same as for end_symtab: the section number
1428 (in objfile->section_offsets) of the blockvector and linetable.
1430 If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made
1433 struct compunit_symtab *
1434 end_symtab_from_static_block (struct block *static_block,
1435 int section, int expandable)
1437 struct compunit_symtab *cu;
1439 if (static_block == NULL)
1441 /* Handle the "no blockvector" case.
1442 When this happens there is nothing to record, so there's nothing
1443 to do: memory will be freed up later.
1445 Note: We won't be adding a compunit to the objfile's list of
1446 compunits, so there's nothing to unchain. However, since each symtab
1447 is added to the objfile's obstack we can't free that space.
1448 We could do better, but this is believed to be a sufficiently rare
1453 cu = end_symtab_with_blockvector (static_block, section, expandable);
1455 reset_symtab_globals ();
1460 /* Finish the symbol definitions for one main source file, close off
1461 all the lexical contexts for that file (creating struct block's for
1462 them), then make the struct symtab for that file and put it in the
1465 END_ADDR is the address of the end of the file's text. SECTION is
1466 the section number (in objfile->section_offsets) of the blockvector
1469 Note that it is possible for end_symtab() to return NULL. In
1470 particular, for the DWARF case at least, it will return NULL when
1471 it finds a compilation unit that has exactly one DIE, a
1472 TAG_compile_unit DIE. This can happen when we link in an object
1473 file that was compiled from an empty source file. Returning NULL
1474 is probably not the correct thing to do, because then gdb will
1475 never know about this empty file (FIXME).
1477 If you need to modify STATIC_BLOCK before it is finalized you should
1478 call end_symtab_get_static_block and end_symtab_from_static_block
1481 struct compunit_symtab *
1482 end_symtab (CORE_ADDR end_addr, int section)
1484 struct block *static_block;
1486 static_block = end_symtab_get_static_block (end_addr, 0, 0);
1487 return end_symtab_from_static_block (static_block, section, 0);
1490 /* Same as end_symtab except create a symtab that can be later added to. */
1492 struct compunit_symtab *
1493 end_expandable_symtab (CORE_ADDR end_addr, int section)
1495 struct block *static_block;
1497 static_block = end_symtab_get_static_block (end_addr, 1, 0);
1498 return end_symtab_from_static_block (static_block, section, 1);
1501 /* Subroutine of augment_type_symtab to simplify it.
1502 Attach the main source file's symtab to all symbols in PENDING_LIST that
1506 set_missing_symtab (struct pending *pending_list,
1507 struct compunit_symtab *cu)
1509 struct pending *pending;
1512 for (pending = pending_list; pending != NULL; pending = pending->next)
1514 for (i = 0; i < pending->nsyms; ++i)
1516 if (symbol_symtab (pending->symbol[i]) == NULL)
1517 symbol_set_symtab (pending->symbol[i], COMPUNIT_FILETABS (cu));
1522 /* Same as end_symtab, but for the case where we're adding more symbols
1523 to an existing symtab that is known to contain only type information.
1524 This is the case for DWARF4 Type Units. */
1527 augment_type_symtab (void)
1529 struct compunit_symtab *cust = buildsym_compunit->compunit_symtab;
1530 const struct blockvector *blockvector = COMPUNIT_BLOCKVECTOR (cust);
1532 if (!buildsym_compunit->m_context_stack.empty ())
1533 complaint (_("Context stack not empty in augment_type_symtab"));
1534 if (buildsym_compunit->m_pending_blocks != NULL)
1535 complaint (_("Blocks in a type symtab"));
1536 if (buildsym_compunit->m_pending_macros != NULL)
1537 complaint (_("Macro in a type symtab"));
1538 if (buildsym_compunit->m_have_line_numbers)
1539 complaint (_("Line numbers recorded in a type symtab"));
1541 if (buildsym_compunit->m_file_symbols != NULL)
1543 struct block *block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK);
1545 /* First mark any symbols without a specified symtab as belonging
1546 to the primary symtab. */
1547 set_missing_symtab (buildsym_compunit->m_file_symbols, cust);
1549 dict_add_pending (BLOCK_DICT (block), buildsym_compunit->m_file_symbols);
1552 if (buildsym_compunit->m_global_symbols != NULL)
1554 struct block *block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK);
1556 /* First mark any symbols without a specified symtab as belonging
1557 to the primary symtab. */
1558 set_missing_symtab (buildsym_compunit->m_global_symbols, cust);
1560 dict_add_pending (BLOCK_DICT (block),
1561 buildsym_compunit->m_global_symbols);
1564 reset_symtab_globals ();
1567 /* Push a context block. Args are an identifying nesting level
1568 (checkable when you pop it), and the starting PC address of this
1571 struct context_stack *
1572 push_context (int desc, CORE_ADDR valu)
1574 gdb_assert (buildsym_compunit != nullptr);
1576 buildsym_compunit->m_context_stack.emplace_back ();
1577 struct context_stack *newobj = &buildsym_compunit->m_context_stack.back ();
1579 newobj->depth = desc;
1580 newobj->locals = buildsym_compunit->m_local_symbols;
1581 newobj->old_blocks = buildsym_compunit->m_pending_blocks;
1582 newobj->start_addr = valu;
1583 newobj->local_using_directives
1584 = buildsym_compunit->m_local_using_directives;
1585 newobj->name = NULL;
1587 buildsym_compunit->m_local_symbols = NULL;
1588 buildsym_compunit->m_local_using_directives = NULL;
1593 /* Pop a context block. Returns the address of the context block just
1596 struct context_stack
1599 gdb_assert (buildsym_compunit != nullptr);
1600 gdb_assert (!buildsym_compunit->m_context_stack.empty ());
1601 struct context_stack result = buildsym_compunit->m_context_stack.back ();
1602 buildsym_compunit->m_context_stack.pop_back ();
1609 record_debugformat (const char *format)
1611 buildsym_compunit->debugformat = format;
1615 record_producer (const char *producer)
1617 buildsym_compunit->producer = producer;
1622 /* See buildsym.h. */
1625 set_last_source_file (const char *name)
1627 gdb_assert (buildsym_compunit != nullptr || name == nullptr);
1628 if (buildsym_compunit != nullptr)
1629 buildsym_compunit->set_last_source_file (name);
1632 /* See buildsym.h. */
1635 get_last_source_file (void)
1637 if (buildsym_compunit == nullptr)
1639 return buildsym_compunit->m_last_source_file.get ();
1642 /* See buildsym.h. */
1645 set_last_source_start_addr (CORE_ADDR addr)
1647 gdb_assert (buildsym_compunit != nullptr);
1648 buildsym_compunit->m_last_source_start_addr = addr;
1651 /* See buildsym.h. */
1654 get_last_source_start_addr ()
1656 gdb_assert (buildsym_compunit != nullptr);
1657 return buildsym_compunit->m_last_source_start_addr;
1660 /* See buildsym.h. */
1662 struct using_direct **
1663 get_local_using_directives ()
1665 gdb_assert (buildsym_compunit != nullptr);
1666 return &buildsym_compunit->m_local_using_directives;
1669 /* See buildsym.h. */
1672 set_local_using_directives (struct using_direct *new_local)
1674 gdb_assert (buildsym_compunit != nullptr);
1675 buildsym_compunit->m_local_using_directives = new_local;
1678 /* See buildsym.h. */
1680 struct using_direct **
1681 get_global_using_directives ()
1683 gdb_assert (buildsym_compunit != nullptr);
1684 return &buildsym_compunit->m_global_using_directives;
1687 /* See buildsym.h. */
1690 outermost_context_p ()
1692 gdb_assert (buildsym_compunit != nullptr);
1693 return buildsym_compunit->m_context_stack.empty ();
1696 /* See buildsym.h. */
1698 struct context_stack *
1699 get_current_context_stack ()
1701 gdb_assert (buildsym_compunit != nullptr);
1702 if (buildsym_compunit->m_context_stack.empty ())
1704 return &buildsym_compunit->m_context_stack.back ();
1707 /* See buildsym.h. */
1710 get_context_stack_depth ()
1712 gdb_assert (buildsym_compunit != nullptr);
1713 return buildsym_compunit->m_context_stack.size ();
1716 /* See buildsym.h. */
1719 get_current_subfile ()
1721 gdb_assert (buildsym_compunit != nullptr);
1722 return buildsym_compunit->m_current_subfile;
1725 /* See buildsym.h. */
1728 get_local_symbols ()
1730 gdb_assert (buildsym_compunit != nullptr);
1731 return &buildsym_compunit->m_local_symbols;
1734 /* See buildsym.h. */
1739 gdb_assert (buildsym_compunit != nullptr);
1740 return &buildsym_compunit->m_file_symbols;
1743 /* See buildsym.h. */
1746 get_global_symbols ()
1748 gdb_assert (buildsym_compunit != nullptr);
1749 return &buildsym_compunit->m_global_symbols;
1754 /* Initialize anything that needs initializing when starting to read a
1755 fresh piece of a symbol file, e.g. reading in the stuff
1756 corresponding to a psymtab. */