/* Definitions for BFD wrappers used by GDB.
- Copyright (C) 2011-2020 Free Software Foundation, Inc.
+ Copyright (C) 2011-2021 Free Software Foundation, Inc.
This file is part of GDB.
fprintf_filtered (file, _("BFD sharing is %s.\n"), value);
}
-/* When non-zero debugging of the bfd caches is enabled. */
+/* When true debugging of the bfd caches is enabled. */
+
+static bool debug_bfd_cache;
+
+/* Print an "bfd-cache" debug statement. */
+
+#define bfd_cache_debug_printf(fmt, ...) \
+ debug_prefixed_printf_cond (debug_bfd_cache, "bfd-cache", fmt, ##__VA_ARGS__)
-static unsigned int debug_bfd_cache;
static void
show_bfd_cache_debug (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
return is_target_filename (bfd_get_filename (abfd));
}
+/* For `gdb_bfd_open_from_target_memory`. */
+
+struct target_buffer
+{
+ CORE_ADDR base;
+ ULONGEST size;
+};
+
+/* For `gdb_bfd_open_from_target_memory`. Opening the file is a no-op. */
+
+static void *
+mem_bfd_iovec_open (struct bfd *abfd, void *open_closure)
+{
+ return open_closure;
+}
+
+/* For `gdb_bfd_open_from_target_memory`. Closing the file is just freeing the
+ base/size pair on our side. */
+
+static int
+mem_bfd_iovec_close (struct bfd *abfd, void *stream)
+{
+ xfree (stream);
+
+ /* Zero means success. */
+ return 0;
+}
+
+/* For `gdb_bfd_open_from_target_memory`. For reading the file, we just need to
+ pass through to target_read_memory and fix up the arguments and return
+ values. */
+
+static file_ptr
+mem_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
+ file_ptr nbytes, file_ptr offset)
+{
+ int err;
+ struct target_buffer *buffer = (struct target_buffer *) stream;
+
+ /* If this read will read all of the file, limit it to just the rest. */
+ if (offset + nbytes > buffer->size)
+ nbytes = buffer->size - offset;
+
+ /* If there are no more bytes left, we've reached EOF. */
+ if (nbytes == 0)
+ return 0;
+
+ err = target_read_memory (buffer->base + offset, (gdb_byte *) buf, nbytes);
+ if (err)
+ return -1;
+
+ return nbytes;
+}
+
+/* For `gdb_bfd_open_from_target_memory`. For statting the file, we only
+ support the st_size attribute. */
+
+static int
+mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
+{
+ struct target_buffer *buffer = (struct target_buffer*) stream;
+
+ memset (sb, 0, sizeof (struct stat));
+ sb->st_size = buffer->size;
+ return 0;
+}
+
+/* See gdb_bfd.h. */
+
+gdb_bfd_ref_ptr
+gdb_bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size,
+ const char *target,
+ const char *filename)
+{
+ struct target_buffer *buffer = XNEW (struct target_buffer);
+
+ buffer->base = addr;
+ buffer->size = size;
+ return gdb_bfd_openr_iovec (filename ? filename : "<in-memory>", target,
+ mem_bfd_iovec_open,
+ buffer,
+ mem_bfd_iovec_pread,
+ mem_bfd_iovec_close,
+ mem_bfd_iovec_stat);
+}
/* Return the system error number corresponding to ERRNUM. */
return pos;
}
+/* Warn that it wasn't possible to close a bfd for file NAME, because
+ of REASON. */
+
+static void
+gdb_bfd_close_warning (const char *name, const char *reason)
+{
+ warning (_("cannot close \"%s\": %s"), name, reason);
+}
+
/* Wrapper for target_fileio_close suitable for passing as the
CLOSE_FUNC argument to gdb_bfd_openr_iovec. */
/* Ignore errors on close. These may happen with remote
targets if the connection has already been torn down. */
- target_fileio_close (fd, &target_errno);
+ try
+ {
+ target_fileio_close (fd, &target_errno);
+ }
+ catch (const gdb_exception &ex)
+ {
+ /* Also avoid crossing exceptions over bfd. */
+ gdb_bfd_close_warning (bfd_get_filename (abfd),
+ ex.message->c_str ());
+ }
/* Zero means success. */
return 0;
if (fd == -1)
{
- fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0);
+ fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0).release ();
if (fd == -1)
{
bfd_set_error (bfd_error_system_call);
if (fstat (fd, &st) < 0)
{
/* Weird situation here -- don't cache if we can't stat. */
- if (debug_bfd_cache)
- fprintf_unfiltered (gdb_stdlog,
- "Could not stat %s - not caching\n",
- name);
+ bfd_cache_debug_printf ("Could not stat %s - not caching", name);
abfd = bfd_fopen (name, target, FOPEN_RB, fd);
if (abfd == nullptr)
return nullptr;
abfd = (struct bfd *) htab_find_with_hash (gdb_bfd_cache, &search, hash);
if (bfd_sharing && abfd != NULL)
{
- if (debug_bfd_cache)
- fprintf_unfiltered (gdb_stdlog,
- "Reusing cached bfd %s for %s\n",
- host_address_to_string (abfd),
- bfd_get_filename (abfd));
+ bfd_cache_debug_printf ("Reusing cached bfd %s for %s",
+ host_address_to_string (abfd),
+ bfd_get_filename (abfd));
close (fd);
return gdb_bfd_ref_ptr::new_reference (abfd);
}
if (abfd == NULL)
return NULL;
- if (debug_bfd_cache)
- fprintf_unfiltered (gdb_stdlog,
- "Creating new bfd %s for %s\n",
- host_address_to_string (abfd),
- bfd_get_filename (abfd));
+ bfd_cache_debug_printf ("Creating new bfd %s for %s",
+ host_address_to_string (abfd),
+ bfd_get_filename (abfd));
if (bfd_sharing)
{
ret = bfd_close (abfd);
if (!ret)
- warning (_("cannot close \"%s\": %s"),
- name, bfd_errmsg (bfd_get_error ()));
+ gdb_bfd_close_warning (name,
+ bfd_errmsg (bfd_get_error ()));
return ret;
}
gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd);
- if (debug_bfd_cache)
- fprintf_unfiltered (gdb_stdlog,
- "Increase reference count on bfd %s (%s)\n",
- host_address_to_string (abfd),
- bfd_get_filename (abfd));
+ bfd_cache_debug_printf ("Increase reference count on bfd %s (%s)",
+ host_address_to_string (abfd),
+ bfd_get_filename (abfd));
if (gdata != NULL)
{
gdata->refc -= 1;
if (gdata->refc > 0)
{
- if (debug_bfd_cache)
- fprintf_unfiltered (gdb_stdlog,
- "Decrease reference count on bfd %s (%s)\n",
- host_address_to_string (abfd),
- bfd_get_filename (abfd));
+ bfd_cache_debug_printf ("Decrease reference count on bfd %s (%s)",
+ host_address_to_string (abfd),
+ bfd_get_filename (abfd));
return;
}
- if (debug_bfd_cache)
- fprintf_unfiltered (gdb_stdlog,
- "Delete final reference count on bfd %s (%s)\n",
- host_address_to_string (abfd),
- bfd_get_filename (abfd));
+ bfd_cache_debug_printf ("Delete final reference count on bfd %s (%s)",
+ host_address_to_string (abfd),
+ bfd_get_filename (abfd));
archive_bfd = gdata->archive_bfd;
search.filename = bfd_get_filename (abfd);
&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."), _("\
+ add_setshow_boolean_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);
+ NULL,
+ &show_bfd_cache_debug,
+ &setdebuglist, &showdebuglist);
}
projects / binutils-gdb.git / blobdiff