+
+ gdb_bfd_unref (archive_bfd);
+}
+
+/* A helper function that returns the section data descriptor
+ associated with SECTION. If no such descriptor exists, a new one
+ is allocated and cleared. */
+
+static struct gdb_bfd_section_data *
+get_section_descriptor (asection *section)
+{
+ struct gdb_bfd_section_data *result;
+
+ result = (struct gdb_bfd_section_data *) bfd_section_userdata (section);
+
+ if (result == NULL)
+ {
+ result = ((struct gdb_bfd_section_data *)
+ bfd_zalloc (section->owner, sizeof (*result)));
+ bfd_set_section_userdata (section, result);
+ }
+
+ return result;
+}
+
+/* See gdb_bfd.h. */
+
+const gdb_byte *
+gdb_bfd_map_section (asection *sectp, bfd_size_type *size)
+{
+ bfd *abfd;
+ struct gdb_bfd_section_data *descriptor;
+ bfd_byte *data;
+
+ gdb_assert ((sectp->flags & SEC_RELOC) == 0);
+ gdb_assert (size != NULL);
+
+ abfd = sectp->owner;
+
+ descriptor = get_section_descriptor (sectp);
+
+ /* If the data was already read for this BFD, just reuse it. */
+ if (descriptor->data != NULL)
+ goto done;
+
+#ifdef HAVE_MMAP
+ if (!bfd_is_section_compressed (abfd, sectp))
+ {
+ /* The page size, used when mmapping. */
+ static int pagesize;
+
+ if (pagesize == 0)
+ pagesize = getpagesize ();
+
+ /* Only try to mmap sections which are large enough: we don't want
+ to waste space due to fragmentation. */
+
+ if (bfd_section_size (sectp) > 4 * pagesize)
+ {
+ descriptor->size = bfd_section_size (sectp);
+ descriptor->data = bfd_mmap (abfd, 0, descriptor->size, PROT_READ,
+ MAP_PRIVATE, sectp->filepos,
+ &descriptor->map_addr,
+ &descriptor->map_len);
+
+ if ((caddr_t)descriptor->data != MAP_FAILED)
+ {
+#if HAVE_POSIX_MADVISE
+ posix_madvise (descriptor->map_addr, descriptor->map_len,
+ POSIX_MADV_WILLNEED);
+#endif
+ goto done;
+ }
+
+ /* On failure, clear out the section data and try again. */
+ memset (descriptor, 0, sizeof (*descriptor));
+ }
+ }
+#endif /* HAVE_MMAP */
+
+ /* Handle compressed sections, or ordinary uncompressed sections in
+ the no-mmap case. */
+
+ descriptor->size = bfd_section_size (sectp);
+ descriptor->data = NULL;
+
+ data = NULL;
+ if (!bfd_get_full_section_contents (abfd, sectp, &data))
+ {
+ warning (_("Can't read data for section '%s' in file '%s'"),
+ bfd_section_name (sectp),
+ bfd_get_filename (abfd));
+ /* Set size to 0 to prevent further attempts to read the invalid
+ section. */
+ *size = 0;
+ return NULL;
+ }
+ descriptor->data = data;
+
+ done:
+ gdb_assert (descriptor->data != NULL);
+ *size = descriptor->size;
+ return (const gdb_byte *) descriptor->data;
+}
+
+/* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and
+ return 1. Otherwise print a warning and return 0. ABFD seek position is
+ not preserved. */
+
+static int
+get_file_crc (bfd *abfd, unsigned long *file_crc_return)
+{
+ unsigned long file_crc = 0;
+
+ if (bfd_seek (abfd, 0, SEEK_SET) != 0)
+ {
+ warning (_("Problem reading \"%s\" for CRC: %s"),
+ bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
+ return 0;
+ }
+
+ for (;;)
+ {
+ gdb_byte buffer[8 * 1024];
+ bfd_size_type count;
+
+ count = bfd_bread (buffer, sizeof (buffer), abfd);
+ if (count == (bfd_size_type) -1)
+ {
+ warning (_("Problem reading \"%s\" for CRC: %s"),
+ bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
+ return 0;
+ }
+ if (count == 0)
+ break;
+ file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
+ }
+
+ *file_crc_return = file_crc;
+ return 1;
+}
+
+/* See gdb_bfd.h. */
+
+int
+gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out)
+{
+ struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd);
+
+ if (!gdata->crc_computed)
+ gdata->crc_computed = get_file_crc (abfd, &gdata->crc);
+
+ if (gdata->crc_computed)
+ *crc_out = gdata->crc;
+ return gdata->crc_computed;
+}
+
+\f
+
+/* See gdb_bfd.h. */
+
+gdb_bfd_ref_ptr
+gdb_bfd_fopen (const char *filename, const char *target, const char *mode,
+ int fd)
+{
+ bfd *result = bfd_fopen (filename, target, mode, fd);
+
+ return gdb_bfd_ref_ptr::new_reference (result);
+}
+
+/* See gdb_bfd.h. */
+
+gdb_bfd_ref_ptr
+gdb_bfd_openr (const char *filename, const char *target)
+{
+ bfd *result = bfd_openr (filename, target);
+
+ return gdb_bfd_ref_ptr::new_reference (result);
+}
+
+/* See gdb_bfd.h. */
+
+gdb_bfd_ref_ptr
+gdb_bfd_openw (const char *filename, const char *target)
+{
+ bfd *result = bfd_openw (filename, target);
+
+ return gdb_bfd_ref_ptr::new_reference (result);
+}
+
+/* See gdb_bfd.h. */
+
+gdb_bfd_ref_ptr
+gdb_bfd_openr_iovec (const char *filename, const char *target,
+ void *(*open_func) (struct bfd *nbfd,
+ void *open_closure),
+ void *open_closure,
+ file_ptr (*pread_func) (struct bfd *nbfd,
+ void *stream,
+ void *buf,
+ file_ptr nbytes,
+ file_ptr offset),
+ int (*close_func) (struct bfd *nbfd,
+ void *stream),
+ int (*stat_func) (struct bfd *abfd,
+ void *stream,
+ struct stat *sb))
+{
+ bfd *result = bfd_openr_iovec (filename, target,
+ open_func, open_closure,
+ pread_func, close_func, stat_func);
+
+ return gdb_bfd_ref_ptr::new_reference (result);
+}
+
+/* See gdb_bfd.h. */
+
+void
+gdb_bfd_mark_parent (bfd *child, bfd *parent)
+{
+ struct gdb_bfd_data *gdata;
+
+ gdb_bfd_ref (child);
+ /* No need to stash the filename here, because we also keep a
+ reference on the parent archive. */
+
+ gdata = (struct gdb_bfd_data *) bfd_usrdata (child);
+ if (gdata->archive_bfd == NULL)
+ {
+ gdata->archive_bfd = parent;
+ gdb_bfd_ref (parent);
+ }
+ else
+ gdb_assert (gdata->archive_bfd == parent);
+}
+
+/* See gdb_bfd.h. */
+
+gdb_bfd_ref_ptr
+gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous)
+{
+ bfd *result = bfd_openr_next_archived_file (archive, previous);
+
+ if (result)
+ gdb_bfd_mark_parent (result, archive);
+
+ return gdb_bfd_ref_ptr (result);
+}
+
+/* See gdb_bfd.h. */
+
+void
+gdb_bfd_record_inclusion (bfd *includer, bfd *includee)
+{
+ struct gdb_bfd_data *gdata;
+
+ gdata = (struct gdb_bfd_data *) bfd_usrdata (includer);
+ gdata->included_bfds.push_back (gdb_bfd_ref_ptr::new_reference (includee));
+}
+
+\f
+
+gdb_static_assert (ARRAY_SIZE (_bfd_std_section) == 4);
+
+/* See gdb_bfd.h. */
+
+int
+gdb_bfd_section_index (bfd *abfd, asection *section)
+{
+ if (section == NULL)
+ return -1;
+ else if (section == bfd_com_section_ptr)
+ return bfd_count_sections (abfd);
+ else if (section == bfd_und_section_ptr)
+ return bfd_count_sections (abfd) + 1;
+ else if (section == bfd_abs_section_ptr)
+ return bfd_count_sections (abfd) + 2;
+ else if (section == bfd_ind_section_ptr)
+ return bfd_count_sections (abfd) + 3;
+ return section->index;
+}
+
+/* See gdb_bfd.h. */
+
+int
+gdb_bfd_count_sections (bfd *abfd)
+{
+ return bfd_count_sections (abfd) + 4;
+}
+
+/* See gdb_bfd.h. */
+
+int
+gdb_bfd_requires_relocations (bfd *abfd)
+{
+ struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd);
+
+ if (gdata->relocation_computed == 0)
+ {
+ asection *sect;
+
+ for (sect = abfd->sections; sect != NULL; sect = sect->next)
+ if ((sect->flags & SEC_RELOC) != 0)
+ {
+ gdata->needs_relocations = 1;
+ break;
+ }
+
+ gdata->relocation_computed = 1;
+ }
+
+ return gdata->needs_relocations;
+}
+
+/* See gdb_bfd.h. */
+
+bool
+gdb_bfd_get_full_section_contents (bfd *abfd, asection *section,
+ gdb::byte_vector *contents)
+{
+ bfd_size_type section_size = bfd_section_size (section);
+
+ contents->resize (section_size);
+
+ return bfd_get_section_contents (abfd, section, contents->data (), 0,
+ section_size);
+}
+
+/* A callback for htab_traverse that prints a single BFD. */
+
+static int
+print_one_bfd (void **slot, void *data)
+{
+ bfd *abfd = (struct bfd *) *slot;
+ struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd);
+ struct ui_out *uiout = (struct ui_out *) data;
+
+ ui_out_emit_tuple tuple_emitter (uiout, NULL);
+ uiout->field_signed ("refcount", gdata->refc);
+ uiout->field_string ("addr", host_address_to_string (abfd));
+ uiout->field_string ("filename", bfd_get_filename (abfd));
+ uiout->text ("\n");
+
+ return 1;
+}
+
+/* Implement the 'maint info bfd' command. */
+
+static void
+maintenance_info_bfds (const char *arg, int from_tty)
+{
+ struct ui_out *uiout = current_uiout;
+
+ ui_out_emit_table table_emitter (uiout, 3, -1, "bfds");
+ uiout->table_header (10, ui_left, "refcount", "Refcount");
+ uiout->table_header (18, ui_left, "addr", "Address");
+ uiout->table_header (40, ui_left, "filename", "Filename");
+
+ uiout->table_body ();
+ htab_traverse (all_bfds, print_one_bfd, uiout);
+}
+
+void _initialize_gdb_bfd ();
+void
+_initialize_gdb_bfd ()
+{
+ all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer,
+ NULL, xcalloc, xfree);
+
+ add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\
+List the BFDs that are currently open."),
+ &maintenanceinfolist);
+
+ add_setshow_boolean_cmd ("bfd-sharing", no_class,
+ &bfd_sharing, _("\
+Set whether gdb will share bfds that appear to be the same file."), _("\
+Show whether gdb will share bfds that appear to be the same file."), _("\
+When enabled gdb will reuse existing bfds rather than reopening the\n\
+same file. To decide if two files are the same then gdb compares the\n\
+filename, file size, file modification time, and file inode."),
+ NULL,
+ &show_bfd_sharing,
+ &maintenance_set_cmdlist,
+ &maintenance_show_cmdlist);
+
+ add_setshow_zuinteger_cmd ("bfd-cache", class_maintenance,
+ &debug_bfd_cache, _("\
+Set bfd cache debugging."), _("\
+Show bfd cache debugging."), _("\
+When non-zero, bfd cache specific debugging is enabled."),
+ NULL,
+ &show_bfd_cache_debug,
+ &setdebuglist, &showdebuglist);