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;
220 /* The mutable address map for the compilation unit whose symbols
221 we're currently reading. The symtabs' shared blockvector will
222 point to a fixed copy of this. */
223 struct addrmap *m_pending_addrmap = nullptr;
225 /* The obstack on which we allocate pending_addrmap.
226 If pending_addrmap is NULL, this is uninitialized; otherwise, it is
227 initialized (and holds pending_addrmap). */
228 auto_obstack m_pending_addrmap_obstack;
230 /* True if we recorded any ranges in the addrmap that are different
231 from those in the blockvector already. We set this to false when
232 we start processing a symfile, and if it's still false at the
233 end, then we just toss the addrmap. */
234 bool m_pending_addrmap_interesting = false;
237 /* The work-in-progress of the compunit we are building.
238 This is created first, before any subfiles by start_symtab. */
240 static struct buildsym_compunit *buildsym_compunit;
242 /* List of free `struct pending' structures for reuse. */
244 static struct pending *free_pendings;
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;
381 free_buildsym_compunit ();
384 /* This function is called to discard any pending blocks. */
387 free_pending_blocks ()
389 if (pending_blocks != NULL)
391 obstack_free (&pending_block_obstack, NULL);
392 pending_blocks = NULL;
396 /* Take one of the lists of symbols and make a block from it. Keep
397 the order the symbols have in the list (reversed from the input
398 file). Put the block on the list of pending blocks. */
400 static struct block *
401 finish_block_internal (struct symbol *symbol,
402 struct pending **listhead,
403 struct pending_block *old_blocks,
404 const struct dynamic_prop *static_link,
405 CORE_ADDR start, CORE_ADDR end,
406 int is_global, int expandable)
408 struct objfile *objfile = buildsym_compunit->objfile;
409 struct gdbarch *gdbarch = get_objfile_arch (objfile);
410 struct pending *next, *next1;
412 struct pending_block *pblock;
413 struct pending_block *opblock;
416 ? allocate_global_block (&objfile->objfile_obstack)
417 : allocate_block (&objfile->objfile_obstack));
422 = dict_create_linear (&objfile->objfile_obstack,
423 buildsym_compunit->language, *listhead);
430 = dict_create_hashed_expandable (buildsym_compunit->language);
431 dict_add_pending (BLOCK_DICT (block), *listhead);
436 dict_create_hashed (&objfile->objfile_obstack,
437 buildsym_compunit->language, *listhead);
441 BLOCK_START (block) = start;
442 BLOCK_END (block) = end;
444 /* Put the block in as the value of the symbol that names it. */
448 struct type *ftype = SYMBOL_TYPE (symbol);
449 struct dict_iterator iter;
450 SYMBOL_BLOCK_VALUE (symbol) = block;
451 BLOCK_FUNCTION (block) = symbol;
453 if (TYPE_NFIELDS (ftype) <= 0)
455 /* No parameter type information is recorded with the
456 function's type. Set that from the type of the
457 parameter symbols. */
458 int nparams = 0, iparams;
461 /* Here we want to directly access the dictionary, because
462 we haven't fully initialized the block yet. */
463 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
465 if (SYMBOL_IS_ARGUMENT (sym))
470 TYPE_NFIELDS (ftype) = nparams;
471 TYPE_FIELDS (ftype) = (struct field *)
472 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
475 /* Here we want to directly access the dictionary, because
476 we haven't fully initialized the block yet. */
477 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
479 if (iparams == nparams)
482 if (SYMBOL_IS_ARGUMENT (sym))
484 TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym);
485 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
494 BLOCK_FUNCTION (block) = NULL;
497 if (static_link != NULL)
498 objfile_register_static_link (objfile, block, static_link);
500 /* Now "free" the links of the list, and empty the list. */
502 for (next = *listhead; next; next = next1)
505 next->next = free_pendings;
506 free_pendings = next;
510 /* Check to be sure that the blocks have an end address that is
511 greater than starting address. */
513 if (BLOCK_END (block) < BLOCK_START (block))
517 complaint (_("block end address less than block "
518 "start address in %s (patched it)"),
519 SYMBOL_PRINT_NAME (symbol));
523 complaint (_("block end address %s less than block "
524 "start address %s (patched it)"),
525 paddress (gdbarch, BLOCK_END (block)),
526 paddress (gdbarch, BLOCK_START (block)));
528 /* Better than nothing. */
529 BLOCK_END (block) = BLOCK_START (block);
532 /* Install this block as the superblock of all blocks made since the
533 start of this scope that don't have superblocks yet. */
536 for (pblock = pending_blocks;
537 pblock && pblock != old_blocks;
538 pblock = pblock->next)
540 if (BLOCK_SUPERBLOCK (pblock->block) == NULL)
542 /* Check to be sure the blocks are nested as we receive
543 them. If the compiler/assembler/linker work, this just
544 burns a small amount of time.
546 Skip blocks which correspond to a function; they're not
547 physically nested inside this other blocks, only
549 if (BLOCK_FUNCTION (pblock->block) == NULL
550 && (BLOCK_START (pblock->block) < BLOCK_START (block)
551 || BLOCK_END (pblock->block) > BLOCK_END (block)))
555 complaint (_("inner block not inside outer block in %s"),
556 SYMBOL_PRINT_NAME (symbol));
560 complaint (_("inner block (%s-%s) not "
561 "inside outer block (%s-%s)"),
562 paddress (gdbarch, BLOCK_START (pblock->block)),
563 paddress (gdbarch, BLOCK_END (pblock->block)),
564 paddress (gdbarch, BLOCK_START (block)),
565 paddress (gdbarch, BLOCK_END (block)));
567 if (BLOCK_START (pblock->block) < BLOCK_START (block))
568 BLOCK_START (pblock->block) = BLOCK_START (block);
569 if (BLOCK_END (pblock->block) > BLOCK_END (block))
570 BLOCK_END (pblock->block) = BLOCK_END (block);
572 BLOCK_SUPERBLOCK (pblock->block) = block;
577 block_set_using (block,
579 ? buildsym_compunit->m_global_using_directives
580 : buildsym_compunit->m_local_using_directives),
581 &objfile->objfile_obstack);
583 buildsym_compunit->m_global_using_directives = NULL;
585 buildsym_compunit->m_local_using_directives = NULL;
587 record_pending_block (objfile, block, opblock);
593 finish_block (struct symbol *symbol,
594 struct pending **listhead,
595 struct pending_block *old_blocks,
596 const struct dynamic_prop *static_link,
597 CORE_ADDR start, CORE_ADDR end)
599 return finish_block_internal (symbol, listhead, old_blocks, static_link,
603 /* Record BLOCK on the list of all blocks in the file. Put it after
604 OPBLOCK, or at the beginning if opblock is NULL. This puts the
605 block in the list after all its subblocks.
607 Allocate the pending block struct in the objfile_obstack to save
608 time. This wastes a little space. FIXME: Is it worth it? */
611 record_pending_block (struct objfile *objfile, struct block *block,
612 struct pending_block *opblock)
614 struct pending_block *pblock;
616 if (pending_blocks == NULL)
617 obstack_init (&pending_block_obstack);
619 pblock = XOBNEW (&pending_block_obstack, struct pending_block);
620 pblock->block = block;
623 pblock->next = opblock->next;
624 opblock->next = pblock;
628 pblock->next = pending_blocks;
629 pending_blocks = pblock;
634 /* Record that the range of addresses from START to END_INCLUSIVE
635 (inclusive, like it says) belongs to BLOCK. BLOCK's start and end
636 addresses must be set already. You must apply this function to all
637 BLOCK's children before applying it to BLOCK.
639 If a call to this function complicates the picture beyond that
640 already provided by BLOCK_START and BLOCK_END, then we create an
641 address map for the block. */
643 record_block_range (struct block *block,
644 CORE_ADDR start, CORE_ADDR end_inclusive)
646 /* If this is any different from the range recorded in the block's
647 own BLOCK_START and BLOCK_END, then note that the address map has
648 become interesting. Note that even if this block doesn't have
649 any "interesting" ranges, some later block might, so we still
650 need to record this block in the addrmap. */
651 if (start != BLOCK_START (block)
652 || end_inclusive + 1 != BLOCK_END (block))
653 buildsym_compunit->m_pending_addrmap_interesting = true;
655 if (buildsym_compunit->m_pending_addrmap == nullptr)
656 buildsym_compunit->m_pending_addrmap
657 = addrmap_create_mutable (&buildsym_compunit->m_pending_addrmap_obstack);
659 addrmap_set_empty (buildsym_compunit->m_pending_addrmap,
660 start, end_inclusive, block);
663 static struct blockvector *
664 make_blockvector (void)
666 struct objfile *objfile = buildsym_compunit->objfile;
667 struct pending_block *next;
668 struct blockvector *blockvector;
671 /* Count the length of the list of blocks. */
673 for (next = pending_blocks, i = 0; next; next = next->next, i++)
677 blockvector = (struct blockvector *)
678 obstack_alloc (&objfile->objfile_obstack,
679 (sizeof (struct blockvector)
680 + (i - 1) * sizeof (struct block *)));
682 /* Copy the blocks into the blockvector. This is done in reverse
683 order, which happens to put the blocks into the proper order
684 (ascending starting address). finish_block has hair to insert
685 each block into the list after its subblocks in order to make
686 sure this is true. */
688 BLOCKVECTOR_NBLOCKS (blockvector) = i;
689 for (next = pending_blocks; next; next = next->next)
691 BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
694 free_pending_blocks ();
696 /* If we needed an address map for this symtab, record it in the
698 if (buildsym_compunit->m_pending_addrmap != nullptr
699 && buildsym_compunit->m_pending_addrmap_interesting)
700 BLOCKVECTOR_MAP (blockvector)
701 = addrmap_create_fixed (buildsym_compunit->m_pending_addrmap,
702 &objfile->objfile_obstack);
704 BLOCKVECTOR_MAP (blockvector) = 0;
706 /* Some compilers output blocks in the wrong order, but we depend on
707 their being in the right order so we can binary search. Check the
708 order and moan about it.
709 Note: Remember that the first two blocks are the global and static
710 blocks. We could special case that fact and begin checking at block 2.
711 To avoid making that assumption we do not. */
712 if (BLOCKVECTOR_NBLOCKS (blockvector) > 1)
714 for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++)
716 if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i - 1))
717 > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i)))
720 = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i));
722 complaint (_("block at %s out of order"),
723 hex_string ((LONGEST) start));
728 return (blockvector);
731 /* Start recording information about source code that came from an
732 included (or otherwise merged-in) source file with a different
733 name. NAME is the name of the file (cannot be NULL). */
736 start_subfile (const char *name)
738 const char *subfile_dirname;
739 struct subfile *subfile;
741 gdb_assert (buildsym_compunit != NULL);
743 subfile_dirname = buildsym_compunit->comp_dir.get ();
745 /* See if this subfile is already registered. */
747 for (subfile = buildsym_compunit->subfiles; subfile; subfile = subfile->next)
751 /* If NAME is an absolute path, and this subfile is not, then
752 attempt to create an absolute path to compare. */
753 if (IS_ABSOLUTE_PATH (name)
754 && !IS_ABSOLUTE_PATH (subfile->name)
755 && subfile_dirname != NULL)
756 subfile_name = concat (subfile_dirname, SLASH_STRING,
757 subfile->name, (char *) NULL);
759 subfile_name = subfile->name;
761 if (FILENAME_CMP (subfile_name, name) == 0)
763 buildsym_compunit->m_current_subfile = subfile;
764 if (subfile_name != subfile->name)
765 xfree (subfile_name);
768 if (subfile_name != subfile->name)
769 xfree (subfile_name);
772 /* This subfile is not known. Add an entry for it. */
774 subfile = XNEW (struct subfile);
775 memset (subfile, 0, sizeof (struct subfile));
776 subfile->buildsym_compunit = buildsym_compunit;
778 subfile->next = buildsym_compunit->subfiles;
779 buildsym_compunit->subfiles = subfile;
781 buildsym_compunit->m_current_subfile = subfile;
783 subfile->name = xstrdup (name);
785 /* Initialize line-number recording for this subfile. */
786 subfile->line_vector = NULL;
788 /* Default the source language to whatever can be deduced from the
789 filename. If nothing can be deduced (such as for a C/C++ include
790 file with a ".h" extension), then inherit whatever language the
791 previous subfile had. This kludgery is necessary because there
792 is no standard way in some object formats to record the source
793 language. Also, when symtabs are allocated we try to deduce a
794 language then as well, but it is too late for us to use that
795 information while reading symbols, since symtabs aren't allocated
796 until after all the symbols have been processed for a given
799 subfile->language = deduce_language_from_filename (subfile->name);
800 if (subfile->language == language_unknown
801 && subfile->next != NULL)
803 subfile->language = subfile->next->language;
806 /* If the filename of this subfile ends in .C, then change the
807 language of any pending subfiles from C to C++. We also accept
808 any other C++ suffixes accepted by deduce_language_from_filename. */
809 /* Likewise for f2c. */
814 enum language sublang = deduce_language_from_filename (subfile->name);
816 if (sublang == language_cplus || sublang == language_fortran)
817 for (s = buildsym_compunit->subfiles; s != NULL; s = s->next)
818 if (s->language == language_c)
819 s->language = sublang;
822 /* And patch up this file if necessary. */
823 if (subfile->language == language_c
824 && subfile->next != NULL
825 && (subfile->next->language == language_cplus
826 || subfile->next->language == language_fortran))
828 subfile->language = subfile->next->language;
832 /* Delete the buildsym compunit. */
835 free_buildsym_compunit (void)
837 if (buildsym_compunit == NULL)
839 delete buildsym_compunit;
840 buildsym_compunit = NULL;
843 /* For stabs readers, the first N_SO symbol is assumed to be the
844 source file name, and the subfile struct is initialized using that
845 assumption. If another N_SO symbol is later seen, immediately
846 following the first one, then the first one is assumed to be the
847 directory name and the second one is really the source file name.
849 So we have to patch up the subfile struct by moving the old name
850 value to dirname and remembering the new name. Some sanity
851 checking is performed to ensure that the state of the subfile
852 struct is reasonable and that the old name we are assuming to be a
853 directory name actually is (by checking for a trailing '/'). */
856 patch_subfile_names (struct subfile *subfile, const char *name)
859 && buildsym_compunit->comp_dir == NULL
860 && subfile->name != NULL
861 && IS_DIR_SEPARATOR (subfile->name[strlen (subfile->name) - 1]))
863 buildsym_compunit->comp_dir.reset (subfile->name);
864 subfile->name = xstrdup (name);
865 set_last_source_file (name);
867 /* Default the source language to whatever can be deduced from
868 the filename. If nothing can be deduced (such as for a C/C++
869 include file with a ".h" extension), then inherit whatever
870 language the previous subfile had. This kludgery is
871 necessary because there is no standard way in some object
872 formats to record the source language. Also, when symtabs
873 are allocated we try to deduce a language then as well, but
874 it is too late for us to use that information while reading
875 symbols, since symtabs aren't allocated until after all the
876 symbols have been processed for a given source file. */
878 subfile->language = deduce_language_from_filename (subfile->name);
879 if (subfile->language == language_unknown
880 && subfile->next != NULL)
882 subfile->language = subfile->next->language;
887 /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for
888 switching source files (different subfiles, as we call them) within
889 one object file, but using a stack rather than in an arbitrary
895 gdb_assert (buildsym_compunit != nullptr);
896 gdb_assert (buildsym_compunit->m_current_subfile != NULL);
897 gdb_assert (buildsym_compunit->m_current_subfile->name != NULL);
898 buildsym_compunit->m_subfile_stack.push_back
899 (buildsym_compunit->m_current_subfile->name);
905 gdb_assert (buildsym_compunit != nullptr);
906 gdb_assert (!buildsym_compunit->m_subfile_stack.empty ());
907 const char *name = buildsym_compunit->m_subfile_stack.back ();
908 buildsym_compunit->m_subfile_stack.pop_back ();
912 /* Add a linetable entry for line number LINE and address PC to the
913 line vector for SUBFILE. */
916 record_line (struct subfile *subfile, int line, CORE_ADDR pc)
918 struct linetable_entry *e;
920 /* Ignore the dummy line number in libg.o */
926 /* Make sure line vector exists and is big enough. */
927 if (!subfile->line_vector)
929 subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH;
930 subfile->line_vector = (struct linetable *)
931 xmalloc (sizeof (struct linetable)
932 + subfile->line_vector_length * sizeof (struct linetable_entry));
933 subfile->line_vector->nitems = 0;
934 buildsym_compunit->m_have_line_numbers = true;
937 if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length)
939 subfile->line_vector_length *= 2;
940 subfile->line_vector = (struct linetable *)
941 xrealloc ((char *) subfile->line_vector,
942 (sizeof (struct linetable)
943 + (subfile->line_vector_length
944 * sizeof (struct linetable_entry))));
947 /* Normally, we treat lines as unsorted. But the end of sequence
948 marker is special. We sort line markers at the same PC by line
949 number, so end of sequence markers (which have line == 0) appear
950 first. This is right if the marker ends the previous function,
951 and there is no padding before the next function. But it is
952 wrong if the previous line was empty and we are now marking a
953 switch to a different subfile. We must leave the end of sequence
954 marker at the end of this group of lines, not sort the empty line
955 to after the marker. The easiest way to accomplish this is to
956 delete any empty lines from our table, if they are followed by
957 end of sequence markers. All we lose is the ability to set
958 breakpoints at some lines which contain no instructions
960 if (line == 0 && subfile->line_vector->nitems > 0)
962 e = subfile->line_vector->item + subfile->line_vector->nitems - 1;
963 while (subfile->line_vector->nitems > 0 && e->pc == pc)
966 subfile->line_vector->nitems--;
970 e = subfile->line_vector->item + subfile->line_vector->nitems++;
975 /* Needed in order to sort line tables from IBM xcoff files. Sigh! */
978 compare_line_numbers (const void *ln1p, const void *ln2p)
980 struct linetable_entry *ln1 = (struct linetable_entry *) ln1p;
981 struct linetable_entry *ln2 = (struct linetable_entry *) ln2p;
983 /* Note: this code does not assume that CORE_ADDRs can fit in ints.
984 Please keep it that way. */
985 if (ln1->pc < ln2->pc)
988 if (ln1->pc > ln2->pc)
991 /* If pc equal, sort by line. I'm not sure whether this is optimum
992 behavior (see comment at struct linetable in symtab.h). */
993 return ln1->line - ln2->line;
996 /* See buildsym.h. */
998 struct compunit_symtab *
999 buildsym_compunit_symtab (void)
1001 gdb_assert (buildsym_compunit != NULL);
1003 return buildsym_compunit->compunit_symtab;
1006 /* See buildsym.h. */
1008 struct macro_table *
1009 get_macro_table (void)
1011 struct objfile *objfile;
1013 gdb_assert (buildsym_compunit != NULL);
1014 return buildsym_compunit->get_macro_table ();
1017 /* Init state to prepare for building a symtab.
1018 Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c
1019 can call start_symtab+end_symtab multiple times after one call to
1023 prepare_for_building ()
1025 local_symbols = NULL;
1027 /* These should have been reset either by successful completion of building
1028 a symtab, or by the scoped_free_pendings destructor. */
1029 gdb_assert (file_symbols == NULL);
1030 gdb_assert (global_symbols == NULL);
1031 gdb_assert (buildsym_compunit == nullptr);
1034 /* Start a new symtab for a new source file in OBJFILE. Called, for example,
1035 when a stabs symbol of type N_SO is seen, or when a DWARF
1036 TAG_compile_unit DIE is seen. It indicates the start of data for
1037 one original source file.
1039 NAME is the name of the file (cannot be NULL). COMP_DIR is the
1040 directory in which the file was compiled (or NULL if not known).
1041 START_ADDR is the lowest address of objects in the file (or 0 if
1042 not known). LANGUAGE is the language of the source file, or
1043 language_unknown if not known, in which case it'll be deduced from
1046 struct compunit_symtab *
1047 start_symtab (struct objfile *objfile, const char *name, const char *comp_dir,
1048 CORE_ADDR start_addr, enum language language)
1050 prepare_for_building ();
1052 buildsym_compunit = new struct buildsym_compunit (objfile, name, comp_dir,
1053 language, start_addr);
1055 /* Allocate the compunit symtab now. The caller needs it to allocate
1056 non-primary symtabs. It is also needed by get_macro_table. */
1057 buildsym_compunit->compunit_symtab = allocate_compunit_symtab (objfile,
1060 /* Build the subfile for NAME (the main source file) so that we can record
1061 a pointer to it for later.
1062 IMPORTANT: Do not allocate a struct symtab for NAME here.
1063 It can happen that the debug info provides a different path to NAME than
1064 DIRNAME,NAME. We cope with this in watch_main_source_file_lossage but
1065 that only works if the main_subfile doesn't have a symtab yet. */
1066 start_subfile (name);
1067 /* Save this so that we don't have to go looking for it at the end
1068 of the subfiles list. */
1069 buildsym_compunit->main_subfile = buildsym_compunit->m_current_subfile;
1071 return buildsym_compunit->compunit_symtab;
1074 /* Restart compilation for a symtab.
1075 CUST is the result of end_expandable_symtab.
1076 NAME, START_ADDR are the source file we are resuming with.
1078 This is used when a symtab is built from multiple sources.
1079 The symtab is first built with start_symtab/end_expandable_symtab
1080 and then for each additional piece call restart_symtab/augment_*_symtab.
1081 Note: At the moment there is only augment_type_symtab. */
1084 restart_symtab (struct compunit_symtab *cust,
1085 const char *name, CORE_ADDR start_addr)
1087 prepare_for_building ();
1090 = new struct buildsym_compunit (COMPUNIT_OBJFILE (cust),
1092 COMPUNIT_DIRNAME (cust),
1093 compunit_language (cust),
1095 buildsym_compunit->compunit_symtab = cust;
1098 /* Subroutine of end_symtab to simplify it. Look for a subfile that
1099 matches the main source file's basename. If there is only one, and
1100 if the main source file doesn't have any symbol or line number
1101 information, then copy this file's symtab and line_vector to the
1102 main source file's subfile and discard the other subfile. This can
1103 happen because of a compiler bug or from the user playing games
1104 with #line or from things like a distributed build system that
1105 manipulates the debug info. This can also happen from an innocent
1106 symlink in the paths, we don't canonicalize paths here. */
1109 watch_main_source_file_lossage (void)
1111 struct subfile *mainsub, *subfile;
1113 /* We have to watch for buildsym_compunit == NULL here. It's a quirk of
1114 end_symtab, it can return NULL so there may not be a main subfile. */
1115 if (buildsym_compunit == NULL)
1118 /* Get the main source file. */
1119 mainsub = buildsym_compunit->main_subfile;
1121 /* If the main source file doesn't have any line number or symbol
1122 info, look for an alias in another subfile. */
1124 if (mainsub->line_vector == NULL
1125 && mainsub->symtab == NULL)
1127 const char *mainbase = lbasename (mainsub->name);
1129 struct subfile *prevsub;
1130 struct subfile *mainsub_alias = NULL;
1131 struct subfile *prev_mainsub_alias = NULL;
1134 for (subfile = buildsym_compunit->subfiles;
1136 subfile = subfile->next)
1138 if (subfile == mainsub)
1140 if (filename_cmp (lbasename (subfile->name), mainbase) == 0)
1143 mainsub_alias = subfile;
1144 prev_mainsub_alias = prevsub;
1149 if (nr_matches == 1)
1151 gdb_assert (mainsub_alias != NULL && mainsub_alias != mainsub);
1153 /* Found a match for the main source file.
1154 Copy its line_vector and symtab to the main subfile
1155 and then discard it. */
1157 mainsub->line_vector = mainsub_alias->line_vector;
1158 mainsub->line_vector_length = mainsub_alias->line_vector_length;
1159 mainsub->symtab = mainsub_alias->symtab;
1161 if (prev_mainsub_alias == NULL)
1162 buildsym_compunit->subfiles = mainsub_alias->next;
1164 prev_mainsub_alias->next = mainsub_alias->next;
1165 xfree (mainsub_alias->name);
1166 xfree (mainsub_alias);
1171 /* Reset state after a successful building of a symtab.
1172 This exists because dbxread.c and xcoffread.c can call
1173 start_symtab+end_symtab multiple times after one call to buildsym_init,
1174 and before the scoped_free_pendings destructor is called.
1175 We keep the free_pendings list around for dbx/xcoff sake. */
1178 reset_symtab_globals (void)
1180 local_symbols = NULL;
1181 file_symbols = NULL;
1182 global_symbols = NULL;
1184 free_buildsym_compunit ();
1187 /* Implementation of the first part of end_symtab. It allows modifying
1188 STATIC_BLOCK before it gets finalized by end_symtab_from_static_block.
1189 If the returned value is NULL there is no blockvector created for
1190 this symtab (you still must call end_symtab_from_static_block).
1192 END_ADDR is the same as for end_symtab: the address of the end of the
1195 If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made
1198 If REQUIRED is non-zero, then a symtab is created even if it does
1199 not contain any symbols. */
1202 end_symtab_get_static_block (CORE_ADDR end_addr, int expandable, int required)
1204 struct objfile *objfile = buildsym_compunit->objfile;
1206 /* Finish the lexical context of the last function in the file; pop
1207 the context stack. */
1209 if (!buildsym_compunit->m_context_stack.empty ())
1211 struct context_stack cstk = pop_context ();
1213 /* Make a block for the local symbols within. */
1214 finish_block (cstk.name, &local_symbols, cstk.old_blocks, NULL,
1215 cstk.start_addr, end_addr);
1217 if (!buildsym_compunit->m_context_stack.empty ())
1219 /* This is said to happen with SCO. The old coffread.c
1220 code simply emptied the context stack, so we do the
1221 same. FIXME: Find out why it is happening. This is not
1222 believed to happen in most cases (even for coffread.c);
1223 it used to be an abort(). */
1224 complaint (_("Context stack not empty in end_symtab"));
1225 buildsym_compunit->m_context_stack.clear ();
1229 /* Reordered executables may have out of order pending blocks; if
1230 OBJF_REORDERED is true, then sort the pending blocks. */
1232 if ((objfile->flags & OBJF_REORDERED) && pending_blocks)
1234 struct pending_block *pb;
1236 std::vector<block *> barray;
1238 for (pb = pending_blocks; pb != NULL; pb = pb->next)
1239 barray.push_back (pb->block);
1241 /* Sort blocks by start address in descending order. Blocks with the
1242 same start address must remain in the original order to preserve
1243 inline function caller/callee relationships. */
1244 std::stable_sort (barray.begin (), barray.end (),
1245 [] (const block *a, const block *b)
1247 return BLOCK_START (a) > BLOCK_START (b);
1251 for (pb = pending_blocks; pb != NULL; pb = pb->next)
1252 pb->block = barray[i++];
1255 /* Cleanup any undefined types that have been left hanging around
1256 (this needs to be done before the finish_blocks so that
1257 file_symbols is still good).
1259 Both cleanup_undefined_stabs_types and finish_global_stabs are stabs
1260 specific, but harmless for other symbol readers, since on gdb
1261 startup or when finished reading stabs, the state is set so these
1262 are no-ops. FIXME: Is this handled right in case of QUIT? Can
1263 we make this cleaner? */
1265 cleanup_undefined_stabs_types (objfile);
1266 finish_global_stabs (objfile);
1269 && pending_blocks == NULL
1270 && file_symbols == NULL
1271 && global_symbols == NULL
1272 && !buildsym_compunit->m_have_line_numbers
1273 && buildsym_compunit->m_pending_macros == NULL
1274 && buildsym_compunit->m_global_using_directives == NULL)
1276 /* Ignore symtabs that have no functions with real debugging info. */
1281 /* Define the STATIC_BLOCK. */
1282 return finish_block_internal (NULL, &file_symbols, NULL, NULL,
1283 buildsym_compunit->m_last_source_start_addr,
1284 end_addr, 0, expandable);
1288 /* Subroutine of end_symtab_from_static_block to simplify it.
1289 Handle the "have blockvector" case.
1290 See end_symtab_from_static_block for a description of the arguments. */
1292 static struct compunit_symtab *
1293 end_symtab_with_blockvector (struct block *static_block,
1294 int section, int expandable)
1296 struct objfile *objfile = buildsym_compunit->objfile;
1297 struct compunit_symtab *cu = buildsym_compunit->compunit_symtab;
1298 struct symtab *symtab;
1299 struct blockvector *blockvector;
1300 struct subfile *subfile;
1303 gdb_assert (static_block != NULL);
1304 gdb_assert (buildsym_compunit != NULL);
1305 gdb_assert (buildsym_compunit->subfiles != NULL);
1307 end_addr = BLOCK_END (static_block);
1309 /* Create the GLOBAL_BLOCK and build the blockvector. */
1310 finish_block_internal (NULL, &global_symbols, NULL, NULL,
1311 buildsym_compunit->m_last_source_start_addr, end_addr,
1313 blockvector = make_blockvector ();
1315 /* Read the line table if it has to be read separately.
1316 This is only used by xcoffread.c. */
1317 if (objfile->sf->sym_read_linetable != NULL)
1318 objfile->sf->sym_read_linetable (objfile);
1320 /* Handle the case where the debug info specifies a different path
1321 for the main source file. It can cause us to lose track of its
1322 line number information. */
1323 watch_main_source_file_lossage ();
1325 /* Now create the symtab objects proper, if not already done,
1326 one for each subfile. */
1328 for (subfile = buildsym_compunit->subfiles;
1330 subfile = subfile->next)
1332 int linetablesize = 0;
1334 if (subfile->line_vector)
1336 linetablesize = sizeof (struct linetable) +
1337 subfile->line_vector->nitems * sizeof (struct linetable_entry);
1339 /* Like the pending blocks, the line table may be
1340 scrambled in reordered executables. Sort it if
1341 OBJF_REORDERED is true. */
1342 if (objfile->flags & OBJF_REORDERED)
1343 qsort (subfile->line_vector->item,
1344 subfile->line_vector->nitems,
1345 sizeof (struct linetable_entry), compare_line_numbers);
1348 /* Allocate a symbol table if necessary. */
1349 if (subfile->symtab == NULL)
1350 subfile->symtab = allocate_symtab (cu, subfile->name);
1351 symtab = subfile->symtab;
1353 /* Fill in its components. */
1355 if (subfile->line_vector)
1357 /* Reallocate the line table on the symbol obstack. */
1358 SYMTAB_LINETABLE (symtab) = (struct linetable *)
1359 obstack_alloc (&objfile->objfile_obstack, linetablesize);
1360 memcpy (SYMTAB_LINETABLE (symtab), subfile->line_vector,
1365 SYMTAB_LINETABLE (symtab) = NULL;
1368 /* Use whatever language we have been using for this
1369 subfile, not the one that was deduced in allocate_symtab
1370 from the filename. We already did our own deducing when
1371 we created the subfile, and we may have altered our
1372 opinion of what language it is from things we found in
1374 symtab->language = subfile->language;
1377 /* Make sure the symtab of main_subfile is the first in its list. */
1379 struct symtab *main_symtab, *prev_symtab;
1381 main_symtab = buildsym_compunit->main_subfile->symtab;
1383 ALL_COMPUNIT_FILETABS (cu, symtab)
1385 if (symtab == main_symtab)
1387 if (prev_symtab != NULL)
1389 prev_symtab->next = main_symtab->next;
1390 main_symtab->next = COMPUNIT_FILETABS (cu);
1391 COMPUNIT_FILETABS (cu) = main_symtab;
1395 prev_symtab = symtab;
1397 gdb_assert (main_symtab == COMPUNIT_FILETABS (cu));
1400 /* Fill out the compunit symtab. */
1402 if (buildsym_compunit->comp_dir != NULL)
1404 /* Reallocate the dirname on the symbol obstack. */
1405 const char *comp_dir = buildsym_compunit->comp_dir.get ();
1406 COMPUNIT_DIRNAME (cu)
1407 = (const char *) obstack_copy0 (&objfile->objfile_obstack,
1408 comp_dir, strlen (comp_dir));
1411 /* Save the debug format string (if any) in the symtab. */
1412 COMPUNIT_DEBUGFORMAT (cu) = buildsym_compunit->debugformat;
1414 /* Similarly for the producer. */
1415 COMPUNIT_PRODUCER (cu) = buildsym_compunit->producer;
1417 COMPUNIT_BLOCKVECTOR (cu) = blockvector;
1419 struct block *b = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK);
1421 set_block_compunit_symtab (b, cu);
1424 COMPUNIT_BLOCK_LINE_SECTION (cu) = section;
1426 COMPUNIT_MACRO_TABLE (cu) = buildsym_compunit->release_macros ();
1428 /* Default any symbols without a specified symtab to the primary symtab. */
1432 /* The main source file's symtab. */
1433 symtab = COMPUNIT_FILETABS (cu);
1435 for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++)
1437 struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i);
1439 struct dict_iterator iter;
1441 /* Inlined functions may have symbols not in the global or
1442 static symbol lists. */
1443 if (BLOCK_FUNCTION (block) != NULL)
1444 if (symbol_symtab (BLOCK_FUNCTION (block)) == NULL)
1445 symbol_set_symtab (BLOCK_FUNCTION (block), symtab);
1447 /* Note that we only want to fix up symbols from the local
1448 blocks, not blocks coming from included symtabs. That is why
1449 we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */
1450 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
1451 if (symbol_symtab (sym) == NULL)
1452 symbol_set_symtab (sym, symtab);
1456 add_compunit_symtab_to_objfile (cu);
1461 /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK
1462 as value returned by end_symtab_get_static_block.
1464 SECTION is the same as for end_symtab: the section number
1465 (in objfile->section_offsets) of the blockvector and linetable.
1467 If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made
1470 struct compunit_symtab *
1471 end_symtab_from_static_block (struct block *static_block,
1472 int section, int expandable)
1474 struct compunit_symtab *cu;
1476 if (static_block == NULL)
1478 /* Handle the "no blockvector" case.
1479 When this happens there is nothing to record, so there's nothing
1480 to do: memory will be freed up later.
1482 Note: We won't be adding a compunit to the objfile's list of
1483 compunits, so there's nothing to unchain. However, since each symtab
1484 is added to the objfile's obstack we can't free that space.
1485 We could do better, but this is believed to be a sufficiently rare
1490 cu = end_symtab_with_blockvector (static_block, section, expandable);
1492 reset_symtab_globals ();
1497 /* Finish the symbol definitions for one main source file, close off
1498 all the lexical contexts for that file (creating struct block's for
1499 them), then make the struct symtab for that file and put it in the
1502 END_ADDR is the address of the end of the file's text. SECTION is
1503 the section number (in objfile->section_offsets) of the blockvector
1506 Note that it is possible for end_symtab() to return NULL. In
1507 particular, for the DWARF case at least, it will return NULL when
1508 it finds a compilation unit that has exactly one DIE, a
1509 TAG_compile_unit DIE. This can happen when we link in an object
1510 file that was compiled from an empty source file. Returning NULL
1511 is probably not the correct thing to do, because then gdb will
1512 never know about this empty file (FIXME).
1514 If you need to modify STATIC_BLOCK before it is finalized you should
1515 call end_symtab_get_static_block and end_symtab_from_static_block
1518 struct compunit_symtab *
1519 end_symtab (CORE_ADDR end_addr, int section)
1521 struct block *static_block;
1523 static_block = end_symtab_get_static_block (end_addr, 0, 0);
1524 return end_symtab_from_static_block (static_block, section, 0);
1527 /* Same as end_symtab except create a symtab that can be later added to. */
1529 struct compunit_symtab *
1530 end_expandable_symtab (CORE_ADDR end_addr, int section)
1532 struct block *static_block;
1534 static_block = end_symtab_get_static_block (end_addr, 1, 0);
1535 return end_symtab_from_static_block (static_block, section, 1);
1538 /* Subroutine of augment_type_symtab to simplify it.
1539 Attach the main source file's symtab to all symbols in PENDING_LIST that
1543 set_missing_symtab (struct pending *pending_list,
1544 struct compunit_symtab *cu)
1546 struct pending *pending;
1549 for (pending = pending_list; pending != NULL; pending = pending->next)
1551 for (i = 0; i < pending->nsyms; ++i)
1553 if (symbol_symtab (pending->symbol[i]) == NULL)
1554 symbol_set_symtab (pending->symbol[i], COMPUNIT_FILETABS (cu));
1559 /* Same as end_symtab, but for the case where we're adding more symbols
1560 to an existing symtab that is known to contain only type information.
1561 This is the case for DWARF4 Type Units. */
1564 augment_type_symtab (void)
1566 struct compunit_symtab *cust = buildsym_compunit->compunit_symtab;
1567 const struct blockvector *blockvector = COMPUNIT_BLOCKVECTOR (cust);
1569 if (!buildsym_compunit->m_context_stack.empty ())
1570 complaint (_("Context stack not empty in augment_type_symtab"));
1571 if (pending_blocks != NULL)
1572 complaint (_("Blocks in a type symtab"));
1573 if (buildsym_compunit->m_pending_macros != NULL)
1574 complaint (_("Macro in a type symtab"));
1575 if (buildsym_compunit->m_have_line_numbers)
1576 complaint (_("Line numbers recorded in a type symtab"));
1578 if (file_symbols != NULL)
1580 struct block *block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK);
1582 /* First mark any symbols without a specified symtab as belonging
1583 to the primary symtab. */
1584 set_missing_symtab (file_symbols, cust);
1586 dict_add_pending (BLOCK_DICT (block), file_symbols);
1589 if (global_symbols != NULL)
1591 struct block *block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK);
1593 /* First mark any symbols without a specified symtab as belonging
1594 to the primary symtab. */
1595 set_missing_symtab (global_symbols, cust);
1597 dict_add_pending (BLOCK_DICT (block), global_symbols);
1600 reset_symtab_globals ();
1603 /* Push a context block. Args are an identifying nesting level
1604 (checkable when you pop it), and the starting PC address of this
1607 struct context_stack *
1608 push_context (int desc, CORE_ADDR valu)
1610 gdb_assert (buildsym_compunit != nullptr);
1612 buildsym_compunit->m_context_stack.emplace_back ();
1613 struct context_stack *newobj = &buildsym_compunit->m_context_stack.back ();
1615 newobj->depth = desc;
1616 newobj->locals = local_symbols;
1617 newobj->old_blocks = pending_blocks;
1618 newobj->start_addr = valu;
1619 newobj->local_using_directives
1620 = buildsym_compunit->m_local_using_directives;
1621 newobj->name = NULL;
1623 local_symbols = NULL;
1624 buildsym_compunit->m_local_using_directives = NULL;
1629 /* Pop a context block. Returns the address of the context block just
1632 struct context_stack
1635 gdb_assert (buildsym_compunit != nullptr);
1636 gdb_assert (!buildsym_compunit->m_context_stack.empty ());
1637 struct context_stack result = buildsym_compunit->m_context_stack.back ();
1638 buildsym_compunit->m_context_stack.pop_back ();
1645 record_debugformat (const char *format)
1647 buildsym_compunit->debugformat = format;
1651 record_producer (const char *producer)
1653 buildsym_compunit->producer = producer;
1658 /* See buildsym.h. */
1661 set_last_source_file (const char *name)
1663 gdb_assert (buildsym_compunit != nullptr || name == nullptr);
1664 if (buildsym_compunit != nullptr)
1665 buildsym_compunit->set_last_source_file (name);
1668 /* See buildsym.h. */
1671 get_last_source_file (void)
1673 if (buildsym_compunit == nullptr)
1675 return buildsym_compunit->m_last_source_file.get ();
1678 /* See buildsym.h. */
1681 set_last_source_start_addr (CORE_ADDR addr)
1683 gdb_assert (buildsym_compunit != nullptr);
1684 buildsym_compunit->m_last_source_start_addr = addr;
1687 /* See buildsym.h. */
1690 get_last_source_start_addr ()
1692 gdb_assert (buildsym_compunit != nullptr);
1693 return buildsym_compunit->m_last_source_start_addr;
1696 /* See buildsym.h. */
1698 struct using_direct **
1699 get_local_using_directives ()
1701 gdb_assert (buildsym_compunit != nullptr);
1702 return &buildsym_compunit->m_local_using_directives;
1705 /* See buildsym.h. */
1708 set_local_using_directives (struct using_direct *new_local)
1710 gdb_assert (buildsym_compunit != nullptr);
1711 buildsym_compunit->m_local_using_directives = new_local;
1714 /* See buildsym.h. */
1716 struct using_direct **
1717 get_global_using_directives ()
1719 gdb_assert (buildsym_compunit != nullptr);
1720 return &buildsym_compunit->m_global_using_directives;
1723 /* See buildsym.h. */
1726 outermost_context_p ()
1728 gdb_assert (buildsym_compunit != nullptr);
1729 return buildsym_compunit->m_context_stack.empty ();
1732 /* See buildsym.h. */
1734 struct context_stack *
1735 get_current_context_stack ()
1737 gdb_assert (buildsym_compunit != nullptr);
1738 if (buildsym_compunit->m_context_stack.empty ())
1740 return &buildsym_compunit->m_context_stack.back ();
1743 /* See buildsym.h. */
1746 get_context_stack_depth ()
1748 gdb_assert (buildsym_compunit != nullptr);
1749 return buildsym_compunit->m_context_stack.size ();
1752 /* See buildsym.h. */
1755 get_current_subfile ()
1757 gdb_assert (buildsym_compunit != nullptr);
1758 return buildsym_compunit->m_current_subfile;
1763 /* Initialize anything that needs initializing when starting to read a
1764 fresh piece of a symbol file, e.g. reading in the stuff
1765 corresponding to a psymtab. */
1770 /* Ensure the scoped_free_pendings destructor was called after
1772 gdb_assert (free_pendings == NULL);
1773 gdb_assert (pending_blocks == NULL);
1774 gdb_assert (file_symbols == NULL);
1775 gdb_assert (global_symbols == NULL);
1776 gdb_assert (buildsym_compunit == NULL);