1 /* GDB routines for manipulating objfiles.
3 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* This file contains support routines for creating, manipulating, and
24 destroying objfile structures. */
27 #include "bfd.h" /* Binary File Description */
31 #include "gdb-stabs.h"
34 #include "mdebugread.h"
35 #include "expression.h"
36 #include "parser-defs.h"
38 #include "gdb_assert.h"
39 #include <sys/types.h>
42 #include "gdb_obstack.h"
43 #include "gdb_string.h"
46 #include "breakpoint.h"
48 #include "dictionary.h"
51 #include "arch-utils.h"
54 /* Prototypes for local functions */
56 static void objfile_alloc_data (struct objfile
*objfile
);
57 static void objfile_free_data (struct objfile
*objfile
);
59 /* Externally visible variables that are owned by this module.
60 See declarations in objfile.h for more info. */
62 struct objfile
*object_files
; /* Linked list of all objfiles */
63 struct objfile
*current_objfile
; /* For symbol file being read in */
64 struct objfile
*symfile_objfile
; /* Main symbol table loaded from */
65 struct objfile
*rt_common_objfile
; /* For runtime common symbols */
67 /* Locate all mappable sections of a BFD file.
68 objfile_p_char is a char * to get it through
69 bfd_map_over_sections; we cast it back to its proper type. */
71 #ifndef TARGET_KEEP_SECTION
72 #define TARGET_KEEP_SECTION(ASECT) 0
75 /* Called via bfd_map_over_sections to build up the section table that
76 the objfile references. The objfile contains pointers to the start
77 of the table (objfile->sections) and to the first location after
78 the end of the table (objfile->sections_end). */
81 add_to_objfile_sections (struct bfd
*abfd
, struct bfd_section
*asect
,
84 struct objfile
*objfile
= (struct objfile
*) objfile_p_char
;
85 struct obj_section section
;
88 aflag
= bfd_get_section_flags (abfd
, asect
);
90 if (!(aflag
& SEC_ALLOC
) && !(TARGET_KEEP_SECTION (asect
)))
93 if (0 == bfd_section_size (abfd
, asect
))
96 section
.objfile
= objfile
;
97 section
.the_bfd_section
= asect
;
98 section
.ovly_mapped
= 0;
99 section
.addr
= bfd_section_vma (abfd
, asect
);
100 section
.endaddr
= section
.addr
+ bfd_section_size (abfd
, asect
);
101 obstack_grow (&objfile
->objfile_obstack
, (char *) §ion
, sizeof (section
));
102 objfile
->sections_end
= (struct obj_section
*) (((unsigned long) objfile
->sections_end
) + 1);
105 /* Builds a section table for OBJFILE.
106 Returns 0 if OK, 1 on error (in which case bfd_error contains the
109 Note that while we are building the table, which goes into the
110 psymbol obstack, we hijack the sections_end pointer to instead hold
111 a count of the number of sections. When bfd_map_over_sections
112 returns, this count is used to compute the pointer to the end of
113 the sections table, which then overwrites the count.
115 Also note that the OFFSET and OVLY_MAPPED in each table entry
116 are initialized to zero.
118 Also note that if anything else writes to the psymbol obstack while
119 we are building the table, we're pretty much hosed. */
122 build_objfile_section_table (struct objfile
*objfile
)
124 /* objfile->sections can be already set when reading a mapped symbol
125 file. I believe that we do need to rebuild the section table in
126 this case (we rebuild other things derived from the bfd), but we
127 can't free the old one (it's in the objfile_obstack). So we just
128 waste some memory. */
130 objfile
->sections_end
= 0;
131 bfd_map_over_sections (objfile
->obfd
, add_to_objfile_sections
, (char *) objfile
);
132 objfile
->sections
= (struct obj_section
*)
133 obstack_finish (&objfile
->objfile_obstack
);
134 objfile
->sections_end
= objfile
->sections
+ (unsigned long) objfile
->sections_end
;
138 /* Given a pointer to an initialized bfd (ABFD) and some flag bits
139 allocate a new objfile struct, fill it in as best we can, link it
140 into the list of all known objfiles, and return a pointer to the
143 The FLAGS word contains various bits (OBJF_*) that can be taken as
144 requests for specific operations. Other bits like OBJF_SHARED are
145 simply copied through to the new objfile flags member. */
147 /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0
148 by jv-lang.c, to create an artificial objfile used to hold
149 information about dynamically-loaded Java classes. Unfortunately,
150 that branch of this function doesn't get tested very frequently, so
151 it's prone to breakage. (E.g. at one time the name was set to NULL
152 in that situation, which broke a loop over all names in the dynamic
153 library loader.) If you change this function, please try to leave
154 things in a consistent state even if abfd is NULL. */
157 allocate_objfile (bfd
*abfd
, int flags
)
159 struct objfile
*objfile
= NULL
;
160 struct objfile
*last_one
= NULL
;
162 /* If we don't support mapped symbol files, didn't ask for the file to be
163 mapped, or failed to open the mapped file for some reason, then revert
164 back to an unmapped objfile. */
168 objfile
= (struct objfile
*) xmalloc (sizeof (struct objfile
));
169 memset (objfile
, 0, sizeof (struct objfile
));
171 objfile
->psymbol_cache
= bcache_xmalloc ();
172 objfile
->macro_cache
= bcache_xmalloc ();
173 /* We could use obstack_specify_allocation here instead, but
174 gdb_obstack.h specifies the alloc/dealloc functions. */
175 obstack_init (&objfile
->objfile_obstack
);
176 terminate_minimal_symbol_table (objfile
);
179 objfile_alloc_data (objfile
);
181 /* Update the per-objfile information that comes from the bfd, ensuring
182 that any data that is reference is saved in the per-objfile data
185 objfile
->obfd
= abfd
;
186 if (objfile
->name
!= NULL
)
188 xfree (objfile
->name
);
192 /* Look up the gdbarch associated with the BFD. */
193 objfile
->gdbarch
= gdbarch_from_bfd (abfd
);
195 objfile
->name
= xstrdup (bfd_get_filename (abfd
));
196 objfile
->mtime
= bfd_get_mtime (abfd
);
198 /* Build section table. */
200 if (build_objfile_section_table (objfile
))
202 error (_("Can't find the file sections in `%s': %s"),
203 objfile
->name
, bfd_errmsg (bfd_get_error ()));
208 objfile
->name
= xstrdup ("<<anonymous objfile>>");
211 /* Initialize the section indexes for this objfile, so that we can
212 later detect if they are used w/o being properly assigned to. */
214 objfile
->sect_index_text
= -1;
215 objfile
->sect_index_data
= -1;
216 objfile
->sect_index_bss
= -1;
217 objfile
->sect_index_rodata
= -1;
219 /* We don't yet have a C++-specific namespace symtab. */
221 objfile
->cp_namespace_symtab
= NULL
;
223 /* Add this file onto the tail of the linked list of other such files. */
225 objfile
->next
= NULL
;
226 if (object_files
== NULL
)
227 object_files
= objfile
;
230 for (last_one
= object_files
;
232 last_one
= last_one
->next
);
233 last_one
->next
= objfile
;
236 /* Save passed in flag bits. */
237 objfile
->flags
|= flags
;
242 /* Retrieve the gdbarch associated with OBJFILE. */
244 get_objfile_arch (struct objfile
*objfile
)
246 return objfile
->gdbarch
;
249 /* Initialize entry point information for this objfile. */
252 init_entry_point_info (struct objfile
*objfile
)
254 /* Save startup file's range of PC addresses to help blockframe.c
255 decide where the bottom of the stack is. */
257 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
259 /* Executable file -- record its entry point so we'll recognize
260 the startup file because it contains the entry point. */
261 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
263 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
264 && bfd_get_start_address (objfile
->obfd
) != 0)
265 /* Some shared libraries may have entry points set and be
266 runnable. There's no clear way to indicate this, so just check
267 for values other than zero. */
268 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
271 /* Examination of non-executable.o files. Short-circuit this stuff. */
272 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
276 /* Get current entry point address. */
279 entry_point_address (void)
281 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
284 /* Create the terminating entry of OBJFILE's minimal symbol table.
285 If OBJFILE->msymbols is zero, allocate a single entry from
286 OBJFILE->objfile_obstack; otherwise, just initialize
287 OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
289 terminate_minimal_symbol_table (struct objfile
*objfile
)
291 if (! objfile
->msymbols
)
292 objfile
->msymbols
= ((struct minimal_symbol
*)
293 obstack_alloc (&objfile
->objfile_obstack
,
294 sizeof (objfile
->msymbols
[0])));
297 struct minimal_symbol
*m
298 = &objfile
->msymbols
[objfile
->minimal_symbol_count
];
300 memset (m
, 0, sizeof (*m
));
301 /* Don't rely on these enumeration values being 0's. */
302 MSYMBOL_TYPE (m
) = mst_unknown
;
303 SYMBOL_INIT_LANGUAGE_SPECIFIC (m
, language_unknown
);
308 /* Put one object file before a specified on in the global list.
309 This can be used to make sure an object file is destroyed before
310 another when using ALL_OBJFILES_SAFE to free all objfiles. */
312 put_objfile_before (struct objfile
*objfile
, struct objfile
*before_this
)
314 struct objfile
**objp
;
316 unlink_objfile (objfile
);
318 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
320 if (*objp
== before_this
)
322 objfile
->next
= *objp
;
328 internal_error (__FILE__
, __LINE__
,
329 _("put_objfile_before: before objfile not in list"));
332 /* Put OBJFILE at the front of the list. */
335 objfile_to_front (struct objfile
*objfile
)
337 struct objfile
**objp
;
338 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
340 if (*objp
== objfile
)
342 /* Unhook it from where it is. */
343 *objp
= objfile
->next
;
344 /* Put it in the front. */
345 objfile
->next
= object_files
;
346 object_files
= objfile
;
352 /* Unlink OBJFILE from the list of known objfiles, if it is found in the
355 It is not a bug, or error, to call this function if OBJFILE is not known
356 to be in the current list. This is done in the case of mapped objfiles,
357 for example, just to ensure that the mapped objfile doesn't appear twice
358 in the list. Since the list is threaded, linking in a mapped objfile
359 twice would create a circular list.
361 If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
362 unlinking it, just to ensure that we have completely severed any linkages
363 between the OBJFILE and the list. */
366 unlink_objfile (struct objfile
*objfile
)
368 struct objfile
**objpp
;
370 for (objpp
= &object_files
; *objpp
!= NULL
; objpp
= &((*objpp
)->next
))
372 if (*objpp
== objfile
)
374 *objpp
= (*objpp
)->next
;
375 objfile
->next
= NULL
;
380 internal_error (__FILE__
, __LINE__
,
381 _("unlink_objfile: objfile already unlinked"));
385 /* Destroy an objfile and all the symtabs and psymtabs under it. Note
386 that as much as possible is allocated on the objfile_obstack
387 so that the memory can be efficiently freed.
389 Things which we do NOT free because they are not in malloc'd memory
390 or not in memory specific to the objfile include:
394 FIXME: If the objfile is using reusable symbol information (via mmalloc),
395 then we need to take into account the fact that more than one process
396 may be using the symbol information at the same time (when mmalloc is
397 extended to support cooperative locking). When more than one process
398 is using the mapped symbol info, we need to be more careful about when
399 we free objects in the reusable area. */
402 free_objfile (struct objfile
*objfile
)
404 if (objfile
->separate_debug_objfile
)
406 free_objfile (objfile
->separate_debug_objfile
);
409 if (objfile
->separate_debug_objfile_backlink
)
411 /* We freed the separate debug file, make sure the base objfile
412 doesn't reference it. */
413 objfile
->separate_debug_objfile_backlink
->separate_debug_objfile
= NULL
;
416 /* Remove any references to this objfile in the global value
418 preserve_values (objfile
);
420 /* First do any symbol file specific actions required when we are
421 finished with a particular symbol file. Note that if the objfile
422 is using reusable symbol information (via mmalloc) then each of
423 these routines is responsible for doing the correct thing, either
424 freeing things which are valid only during this particular gdb
425 execution, or leaving them to be reused during the next one. */
427 if (objfile
->sf
!= NULL
)
429 (*objfile
->sf
->sym_finish
) (objfile
);
432 /* We always close the bfd. */
434 if (objfile
->obfd
!= NULL
)
436 char *name
= bfd_get_filename (objfile
->obfd
);
437 if (!bfd_close (objfile
->obfd
))
438 warning (_("cannot close \"%s\": %s"),
439 name
, bfd_errmsg (bfd_get_error ()));
443 /* Remove it from the chain of all objfiles. */
445 unlink_objfile (objfile
);
447 /* If we are going to free the runtime common objfile, mark it
450 if (objfile
== rt_common_objfile
)
451 rt_common_objfile
= NULL
;
453 /* Before the symbol table code was redone to make it easier to
454 selectively load and remove information particular to a specific
455 linkage unit, gdb used to do these things whenever the monolithic
456 symbol table was blown away. How much still needs to be done
457 is unknown, but we play it safe for now and keep each action until
458 it is shown to be no longer needed. */
460 /* Not all our callers call clear_symtab_users (objfile_purge_solibs,
461 for example), so we need to call this here. */
462 clear_pc_function_cache ();
464 /* Clear globals which might have pointed into a removed objfile.
465 FIXME: It's not clear which of these are supposed to persist
466 between expressions and which ought to be reset each time. */
467 expression_context_block
= NULL
;
468 innermost_block
= NULL
;
470 /* Check to see if the current_source_symtab belongs to this objfile,
471 and if so, call clear_current_source_symtab_and_line. */
474 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
477 ALL_OBJFILE_SYMTABS (objfile
, s
)
479 if (s
== cursal
.symtab
)
480 clear_current_source_symtab_and_line ();
484 /* The last thing we do is free the objfile struct itself. */
486 objfile_free_data (objfile
);
487 if (objfile
->name
!= NULL
)
489 xfree (objfile
->name
);
491 if (objfile
->global_psymbols
.list
)
492 xfree (objfile
->global_psymbols
.list
);
493 if (objfile
->static_psymbols
.list
)
494 xfree (objfile
->static_psymbols
.list
);
495 /* Free the obstacks for non-reusable objfiles */
496 bcache_xfree (objfile
->psymbol_cache
);
497 bcache_xfree (objfile
->macro_cache
);
498 if (objfile
->demangled_names_hash
)
499 htab_delete (objfile
->demangled_names_hash
);
500 obstack_free (&objfile
->objfile_obstack
, 0);
506 do_free_objfile_cleanup (void *obj
)
512 make_cleanup_free_objfile (struct objfile
*obj
)
514 return make_cleanup (do_free_objfile_cleanup
, obj
);
517 /* Free all the object files at once and clean up their users. */
520 free_all_objfiles (void)
522 struct objfile
*objfile
, *temp
;
524 ALL_OBJFILES_SAFE (objfile
, temp
)
526 free_objfile (objfile
);
528 clear_symtab_users ();
531 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
532 entries in new_offsets. */
534 objfile_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
)
536 struct obj_section
*s
;
537 struct section_offsets
*delta
=
538 ((struct section_offsets
*)
539 alloca (SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
)));
543 int something_changed
= 0;
544 for (i
= 0; i
< objfile
->num_sections
; ++i
)
547 ANOFFSET (new_offsets
, i
) - ANOFFSET (objfile
->section_offsets
, i
);
548 if (ANOFFSET (delta
, i
) != 0)
549 something_changed
= 1;
551 if (!something_changed
)
555 /* OK, get all the symtabs. */
559 ALL_OBJFILE_SYMTABS (objfile
, s
)
562 struct blockvector
*bv
;
565 /* First the line table. */
569 for (i
= 0; i
< l
->nitems
; ++i
)
570 l
->item
[i
].pc
+= ANOFFSET (delta
, s
->block_line_section
);
573 /* Don't relocate a shared blockvector more than once. */
577 bv
= BLOCKVECTOR (s
);
578 for (i
= 0; i
< BLOCKVECTOR_NBLOCKS (bv
); ++i
)
582 struct dict_iterator iter
;
584 b
= BLOCKVECTOR_BLOCK (bv
, i
);
585 BLOCK_START (b
) += ANOFFSET (delta
, s
->block_line_section
);
586 BLOCK_END (b
) += ANOFFSET (delta
, s
->block_line_section
);
587 if (BLOCKVECTOR_MAP (bv
))
588 addrmap_relocate (BLOCKVECTOR_MAP (bv
),
589 ANOFFSET (delta
, s
->block_line_section
));
591 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
593 fixup_symbol_section (sym
, objfile
);
595 /* The RS6000 code from which this was taken skipped
596 any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN.
597 But I'm leaving out that test, on the theory that
598 they can't possibly pass the tests below. */
599 if ((SYMBOL_CLASS (sym
) == LOC_LABEL
600 || SYMBOL_CLASS (sym
) == LOC_STATIC
)
601 && SYMBOL_SECTION (sym
) >= 0)
603 SYMBOL_VALUE_ADDRESS (sym
) +=
604 ANOFFSET (delta
, SYMBOL_SECTION (sym
));
612 struct partial_symtab
*p
;
614 ALL_OBJFILE_PSYMTABS (objfile
, p
)
616 p
->textlow
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
617 p
->texthigh
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
622 struct partial_symbol
**psym
;
624 for (psym
= objfile
->global_psymbols
.list
;
625 psym
< objfile
->global_psymbols
.next
;
628 fixup_psymbol_section (*psym
, objfile
);
629 if (SYMBOL_SECTION (*psym
) >= 0)
630 SYMBOL_VALUE_ADDRESS (*psym
) += ANOFFSET (delta
,
631 SYMBOL_SECTION (*psym
));
633 for (psym
= objfile
->static_psymbols
.list
;
634 psym
< objfile
->static_psymbols
.next
;
637 fixup_psymbol_section (*psym
, objfile
);
638 if (SYMBOL_SECTION (*psym
) >= 0)
639 SYMBOL_VALUE_ADDRESS (*psym
) += ANOFFSET (delta
,
640 SYMBOL_SECTION (*psym
));
645 struct minimal_symbol
*msym
;
646 ALL_OBJFILE_MSYMBOLS (objfile
, msym
)
647 if (SYMBOL_SECTION (msym
) >= 0)
648 SYMBOL_VALUE_ADDRESS (msym
) += ANOFFSET (delta
, SYMBOL_SECTION (msym
));
650 /* Relocating different sections by different amounts may cause the symbols
651 to be out of order. */
652 msymbols_sort (objfile
);
656 for (i
= 0; i
< objfile
->num_sections
; ++i
)
657 (objfile
->section_offsets
)->offsets
[i
] = ANOFFSET (new_offsets
, i
);
660 if (objfile
->ei
.entry_point
!= ~(CORE_ADDR
) 0)
662 /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT
663 only as a fallback. */
664 struct obj_section
*s
;
665 s
= find_pc_section (objfile
->ei
.entry_point
);
667 objfile
->ei
.entry_point
+= ANOFFSET (delta
, s
->the_bfd_section
->index
);
669 objfile
->ei
.entry_point
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
673 struct obj_section
*s
;
676 abfd
= objfile
->obfd
;
678 ALL_OBJFILE_OSECTIONS (objfile
, s
)
680 int idx
= s
->the_bfd_section
->index
;
682 s
->addr
+= ANOFFSET (delta
, idx
);
683 s
->endaddr
+= ANOFFSET (delta
, idx
);
687 /* Update the table in exec_ops, used to read memory. */
688 ALL_OBJFILE_OSECTIONS (objfile
, s
)
690 int idx
= s
->the_bfd_section
->index
;
692 exec_set_section_address (bfd_get_filename (objfile
->obfd
), idx
,
696 /* Relocate breakpoints as necessary, after things are relocated. */
697 breakpoint_re_set ();
700 /* Many places in gdb want to test just to see if we have any partial
701 symbols available. This function returns zero if none are currently
702 available, nonzero otherwise. */
705 have_partial_symbols (void)
711 if (ofp
->psymtabs
!= NULL
)
719 /* Many places in gdb want to test just to see if we have any full
720 symbols available. This function returns zero if none are currently
721 available, nonzero otherwise. */
724 have_full_symbols (void)
730 if (ofp
->symtabs
!= NULL
)
739 /* This operations deletes all objfile entries that represent solibs that
740 weren't explicitly loaded by the user, via e.g., the add-symbol-file
744 objfile_purge_solibs (void)
746 struct objfile
*objf
;
747 struct objfile
*temp
;
749 ALL_OBJFILES_SAFE (objf
, temp
)
751 /* We assume that the solib package has been purged already, or will
754 if (!(objf
->flags
& OBJF_USERLOADED
) && (objf
->flags
& OBJF_SHARED
))
760 /* Many places in gdb want to test just to see if we have any minimal
761 symbols available. This function returns zero if none are currently
762 available, nonzero otherwise. */
765 have_minimal_symbols (void)
771 if (ofp
->minimal_symbol_count
> 0)
779 /* Returns a section whose range includes PC and SECTION, or NULL if
780 none found. Note the distinction between the return type, struct
781 obj_section (which is defined in gdb), and the input type "struct
782 bfd_section" (which is a bfd-defined data type). The obj_section
783 contains a pointer to the "struct bfd_section". */
786 find_pc_sect_section (CORE_ADDR pc
, struct bfd_section
*section
)
788 struct obj_section
*s
;
789 struct objfile
*objfile
;
791 ALL_OBJSECTIONS (objfile
, s
)
792 if ((section
== 0 || section
== s
->the_bfd_section
) &&
793 s
->addr
<= pc
&& pc
< s
->endaddr
)
799 /* Returns a section whose range includes PC or NULL if none found.
800 Backward compatibility, no section. */
803 find_pc_section (CORE_ADDR pc
)
805 return find_pc_sect_section (pc
, find_pc_mapped_section (pc
));
809 /* In SVR4, we recognize a trampoline by it's section name.
810 That is, if the pc is in a section named ".plt" then we are in
814 in_plt_section (CORE_ADDR pc
, char *name
)
816 struct obj_section
*s
;
819 s
= find_pc_section (pc
);
822 && s
->the_bfd_section
->name
!= NULL
823 && strcmp (s
->the_bfd_section
->name
, ".plt") == 0);
828 /* Keep a registry of per-objfile data-pointers required by other GDB
834 void (*cleanup
) (struct objfile
*, void *);
837 struct objfile_data_registration
839 struct objfile_data
*data
;
840 struct objfile_data_registration
*next
;
843 struct objfile_data_registry
845 struct objfile_data_registration
*registrations
;
846 unsigned num_registrations
;
849 static struct objfile_data_registry objfile_data_registry
= { NULL
, 0 };
851 const struct objfile_data
*
852 register_objfile_data_with_cleanup (void (*cleanup
) (struct objfile
*, void *))
854 struct objfile_data_registration
**curr
;
856 /* Append new registration. */
857 for (curr
= &objfile_data_registry
.registrations
;
858 *curr
!= NULL
; curr
= &(*curr
)->next
);
860 *curr
= XMALLOC (struct objfile_data_registration
);
861 (*curr
)->next
= NULL
;
862 (*curr
)->data
= XMALLOC (struct objfile_data
);
863 (*curr
)->data
->index
= objfile_data_registry
.num_registrations
++;
864 (*curr
)->data
->cleanup
= cleanup
;
866 return (*curr
)->data
;
869 const struct objfile_data
*
870 register_objfile_data (void)
872 return register_objfile_data_with_cleanup (NULL
);
876 objfile_alloc_data (struct objfile
*objfile
)
878 gdb_assert (objfile
->data
== NULL
);
879 objfile
->num_data
= objfile_data_registry
.num_registrations
;
880 objfile
->data
= XCALLOC (objfile
->num_data
, void *);
884 objfile_free_data (struct objfile
*objfile
)
886 gdb_assert (objfile
->data
!= NULL
);
887 clear_objfile_data (objfile
);
888 xfree (objfile
->data
);
889 objfile
->data
= NULL
;
893 clear_objfile_data (struct objfile
*objfile
)
895 struct objfile_data_registration
*registration
;
898 gdb_assert (objfile
->data
!= NULL
);
900 for (registration
= objfile_data_registry
.registrations
, i
= 0;
901 i
< objfile
->num_data
;
902 registration
= registration
->next
, i
++)
903 if (objfile
->data
[i
] != NULL
&& registration
->data
->cleanup
)
904 registration
->data
->cleanup (objfile
, objfile
->data
[i
]);
906 memset (objfile
->data
, 0, objfile
->num_data
* sizeof (void *));
910 set_objfile_data (struct objfile
*objfile
, const struct objfile_data
*data
,
913 gdb_assert (data
->index
< objfile
->num_data
);
914 objfile
->data
[data
->index
] = value
;
918 objfile_data (struct objfile
*objfile
, const struct objfile_data
*data
)
920 gdb_assert (data
->index
< objfile
->num_data
);
921 return objfile
->data
[data
->index
];