- if (mapped_symbol_files)
- flags |= OBJF_MAPPED;
-
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
- if (abfd != NULL)
- {
-
- /* If we can support mapped symbol files, try to open/reopen the
- mapped file that corresponds to the file from which we wish to
- read symbols. If the objfile is to be mapped, we must malloc
- the structure itself using the mmap version, and arrange that
- all memory allocation for the objfile uses the mmap routines.
- If we are reusing an existing mapped file, from which we get
- our objfile pointer, we have to make sure that we update the
- pointers to the alloc/free functions in the obstack, in case
- these functions have moved within the current gdb. */
-
- int fd;
-
- fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd),
- flags);
- if (fd >= 0)
- {
- void *md;
-
- if ((md = map_to_file (fd)) == NULL)
- {
- close (fd);
- }
- else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL)
- {
- /* Update memory corruption handler function addresses. */
- init_malloc (md);
- objfile->md = md;
- objfile->mmfd = fd;
- /* Update pointers to functions to *our* copies */
- if (objfile->demangled_names_hash)
- htab_set_functions_ex
- (objfile->demangled_names_hash, htab_hash_string,
- (int (*) (const void *, const void *)) streq, NULL,
- objfile->md, xmcalloc, xmfree);
- obstack_chunkfun (&objfile->psymbol_cache.cache, xmmalloc);
- obstack_freefun (&objfile->psymbol_cache.cache, xmfree);
- obstack_chunkfun (&objfile->macro_cache.cache, xmmalloc);
- obstack_freefun (&objfile->macro_cache.cache, xmfree);
- obstack_chunkfun (&objfile->psymbol_obstack, xmmalloc);
- obstack_freefun (&objfile->psymbol_obstack, xmfree);
- obstack_chunkfun (&objfile->symbol_obstack, xmmalloc);
- obstack_freefun (&objfile->symbol_obstack, xmfree);
- obstack_chunkfun (&objfile->type_obstack, xmmalloc);
- obstack_freefun (&objfile->type_obstack, xmfree);
- /* If already in objfile list, unlink it. */
- unlink_objfile (objfile);
- /* Forget things specific to a particular gdb, may have changed. */
- objfile->sf = NULL;
- }
- else
- {
-
- /* Set up to detect internal memory corruption. MUST be
- done before the first malloc. See comments in
- init_malloc() and mmcheck(). */
-
- init_malloc (md);
-
- objfile = (struct objfile *)
- xmmalloc (md, sizeof (struct objfile));
- memset (objfile, 0, sizeof (struct objfile));
- objfile->md = md;
- objfile->mmfd = fd;
- objfile->flags |= OBJF_MAPPED;
- mmalloc_setkey (objfile->md, 0, objfile);
- obstack_specify_allocation_with_arg (&objfile->psymbol_cache.cache,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- obstack_specify_allocation_with_arg (&objfile->macro_cache.cache,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- obstack_specify_allocation_with_arg (&objfile->psymbol_obstack,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- obstack_specify_allocation_with_arg (&objfile->symbol_obstack,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- obstack_specify_allocation_with_arg (&objfile->type_obstack,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- }
- }
-
- if ((flags & OBJF_MAPPED) && (objfile == NULL))
- {
- warning ("symbol table for '%s' will not be mapped",
- bfd_get_filename (abfd));
- flags &= ~OBJF_MAPPED;
- }
- }
-#else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */
-
- if (flags & OBJF_MAPPED)
- {
- warning ("mapped symbol tables are not supported on this machine; missing or broken mmap().");
-
- /* Turn off the global flag so we don't try to do mapped symbol tables
- any more, which shuts up gdb unless the user specifically gives the
- "mapped" keyword again. */
-
- mapped_symbol_files = 0;
- flags &= ~OBJF_MAPPED;
- }
-
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
-
projects / deliverable / binutils-gdb.git / blobdiff