/* Handle shared libraries for GDB, the GNU Debugger.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010
+ 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of GDB.
#include "remote.h"
#include "solib.h"
#include "interps.h"
+#include "filesystem.h"
/* Architecture-specific operations. */
solib_ops (struct gdbarch *gdbarch)
{
struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data);
+
return *ops;
}
set_solib_ops (struct gdbarch *gdbarch, struct target_so_ops *new_ops)
{
struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data);
+
*ops = new_ops;
}
\f
show_solib_search_path (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- fprintf_filtered (file, _("\
-The search path for loading non-absolute shared library symbol files is %s.\n"),
+ fprintf_filtered (file, _("The search path for loading non-absolute "
+ "shared library symbol files is %s.\n"),
value);
}
+/* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */
+#if (HAVE_DOS_BASED_FILE_SYSTEM)
+# define DOS_BASED_FILE_SYSTEM 1
+#else
+# define DOS_BASED_FILE_SYSTEM 0
+#endif
+
/*
GLOBAL FUNCTION
* If gdb_sysroot is NOT set, perform the following two searches:
* Look in inferior's $PATH.
* Look in inferior's $LD_LIBRARY_PATH.
- *
+ *
* The last check avoids doing this search when targetting remote
* machines since gdb_sysroot will almost always be set.
int gdb_sysroot_is_empty;
const char *solib_symbols_extension
= gdbarch_solib_symbols_extension (target_gdbarch);
+ const char *fskind = effective_target_file_system_kind ();
+ struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
+ char *sysroot = NULL;
/* If solib_symbols_extension is set, replace the file's
extension. */
if (solib_symbols_extension)
{
char *p = in_pathname + strlen (in_pathname);
+
while (p > in_pathname && *p != '.')
p--;
gdb_sysroot_is_empty = (gdb_sysroot == NULL || *gdb_sysroot == 0);
- if (! IS_ABSOLUTE_PATH (in_pathname) || gdb_sysroot_is_empty)
- temp_pathname = in_pathname;
- else
+ if (!gdb_sysroot_is_empty)
{
int prefix_len = strlen (gdb_sysroot);
&& IS_DIR_SEPARATOR (gdb_sysroot[prefix_len - 1]))
prefix_len--;
+ sysroot = savestring (gdb_sysroot, prefix_len);
+ make_cleanup (xfree, sysroot);
+ }
+
+ /* If we're on a non-DOS-based system, backslashes won't be
+ understood as directory separator, so, convert them to forward
+ slashes, iff we're supposed to handle DOS-based file system
+ semantics for target paths. */
+ if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based)
+ {
+ char *p;
+
+ /* Avoid clobbering our input. */
+ p = alloca (strlen (in_pathname) + 1);
+ strcpy (p, in_pathname);
+ in_pathname = p;
+
+ for (; *p; p++)
+ {
+ if (*p == '\\')
+ *p = '/';
+ }
+ }
+
+ /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not
+ IS_ABSOLUTE_PATH. The latter is for host paths only, while
+ IN_PATHNAME is a target path. For example, if we're supposed to
+ be handling DOS-like semantics we want to consider a
+ 'c:/foo/bar.dll' path as an absolute path, even on a Unix box.
+ With such a path, before giving up on the sysroot, we'll try:
+
+ 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll
+ 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll
+ 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll
+ */
+
+ if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || gdb_sysroot_is_empty)
+ temp_pathname = xstrdup (in_pathname);
+ else
+ {
+ int need_dir_separator;
+
+ need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[0]);
+
/* Cat the prefixed pathname together. */
- temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1);
- strncpy (temp_pathname, gdb_sysroot, prefix_len);
- temp_pathname[prefix_len] = '\0';
- strcat (temp_pathname, in_pathname);
+ temp_pathname = concat (sysroot,
+ need_dir_separator ? SLASH_STRING : "",
+ in_pathname, (char *) NULL);
}
/* Handle remote files. */
if (remote_filename_p (temp_pathname))
{
*fd = -1;
- return xstrdup (temp_pathname);
+ do_cleanups (old_chain);
+ return temp_pathname;
}
/* Now see if we can open it. */
found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0);
+ if (found_file < 0)
+ xfree (temp_pathname);
+
+ /* If the search in gdb_sysroot failed, and the path name has a
+ drive spec (e.g, c:/foo), try stripping ':' from the drive spec,
+ and retrying in the sysroot:
+ c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */
+
+ if (found_file < 0
+ && !gdb_sysroot_is_empty
+ && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname))
+ {
+ int need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]);
+ char *drive = savestring (in_pathname, 1);
+
+ temp_pathname = concat (sysroot,
+ SLASH_STRING,
+ drive,
+ need_dir_separator ? SLASH_STRING : "",
+ in_pathname + 2, (char *) NULL);
+ xfree (drive);
+
+ found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0);
+ if (found_file < 0)
+ {
+ xfree (temp_pathname);
+
+ /* If the search in gdb_sysroot still failed, try fully
+ stripping the drive spec, and trying once more in the
+ sysroot before giving up.
- /* We try to find the library in various ways. After each attempt
- (except for the one above), either found_file >= 0 and
- temp_pathname is a malloc'd string, or found_file < 0 and
- temp_pathname does not point to storage that needs to be
- freed. */
+ c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */
- if (found_file < 0)
- temp_pathname = NULL;
- else
- temp_pathname = xstrdup (temp_pathname);
+ temp_pathname = concat (sysroot,
+ need_dir_separator ? SLASH_STRING : "",
+ in_pathname + 2, (char *) NULL);
+
+ found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0);
+ if (found_file < 0)
+ xfree (temp_pathname);
+ }
+ }
+
+ do_cleanups (old_chain);
+
+ /* We try to find the library in various ways. After each attempt,
+ either found_file >= 0 and temp_pathname is a malloc'd string, or
+ found_file < 0 and temp_pathname does not point to storage that
+ needs to be freed. */
+
+ if (found_file < 0)
+ temp_pathname = NULL;
+
+ /* If not found, search the solib_search_path (if any). */
+ if (found_file < 0 && solib_search_path != NULL)
+ found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
+ in_pathname, O_RDONLY | O_BINARY, &temp_pathname);
/* If the search in gdb_sysroot failed, and the path name is
absolute at this point, make it relative. (openp will try and open the
file according to its absolute path otherwise, which is not what we want.)
Affects subsequent searches for this solib. */
- if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname))
+ if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname))
{
/* First, get rid of any drive letters etc. */
- while (!IS_DIR_SEPARATOR (*in_pathname))
- in_pathname++;
+ while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname))
+ in_pathname++;
/* Next, get rid of all leading dir separators. */
- while (IS_DIR_SEPARATOR (*in_pathname))
- in_pathname++;
+ while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname))
+ in_pathname++;
}
-
+
/* If not found, search the solib_search_path (if any). */
if (found_file < 0 && solib_search_path != NULL)
found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
in_pathname, O_RDONLY | O_BINARY, &temp_pathname);
-
+
/* If not found, next search the solib_search_path (if any) for the basename
only (ignoring the path). This is to allow reading solibs from a path
that differs from the opened path. */
if (found_file < 0 && solib_search_path != NULL)
found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
- lbasename (in_pathname), O_RDONLY | O_BINARY,
- &temp_pathname);
+ target_lbasename (fskind, in_pathname),
+ O_RDONLY | O_BINARY, &temp_pathname);
- /* If not found, try to use target supplied solib search method */
+ /* If not found, try to use target supplied solib search method. */
if (found_file < 0 && ops->find_and_open_solib)
found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY,
&temp_pathname);
- /* If not found, next search the inferior's $PATH environment variable. */
+ /* If not found, next search the inferior's $PATH environment variable. */
if (found_file < 0 && gdb_sysroot_is_empty)
found_file = openp (get_in_environ (current_inferior ()->environment,
"PATH"),
OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY,
&temp_pathname);
- /* If not found, next search the inferior's $LD_LIBRARY_PATH
- environment variable. */
+ /* If not found, next search the inferior's $LD_LIBRARY_PATH
+ environment variable. */
if (found_file < 0 && gdb_sysroot_is_empty)
found_file = openp (get_in_environ (current_inferior ()->environment,
"LD_LIBRARY_PATH"),
so->abfd = gdb_bfd_ref (abfd);
/* copy full path name into so_name, so that later symbol_file_add
- can find it */
+ can find it. */
if (strlen (bfd_get_filename (abfd)) >= SO_NAME_MAX_PATH_SIZE)
error (_("Shared library file name is too long."));
strcpy (so->so_name, bfd_get_filename (abfd));
{
/* Relocate the section binding addresses as recorded in the shared
object's file by the base address to which the object was actually
- mapped. */
+ mapped. */
ops->relocate_section_addresses (so, p);
/* If the target didn't provide information about the address
return 1;
}
+/* Free symbol-file related contents of SO. If we have opened a BFD
+ for SO, close it. If we have placed SO's sections in some target's
+ section table, the caller is responsible for removing them.
+
+ This function doesn't mess with objfiles at all. If there is an
+ objfile associated with SO that needs to be removed, the caller is
+ responsible for taking care of that. */
+
+static void
+free_so_symbols (struct so_list *so)
+{
+ if (so->sections)
+ {
+ xfree (so->sections);
+ so->sections = so->sections_end = NULL;
+ }
+
+ gdb_bfd_unref (so->abfd);
+ so->abfd = NULL;
+
+ /* Our caller closed the objfile, possibly via objfile_purge_solibs. */
+ so->symbols_loaded = 0;
+ so->objfile = NULL;
+
+ so->addr_low = so->addr_high = 0;
+
+ /* Restore the target-supplied file name. SO_NAME may be the path
+ of the symbol file. */
+ strcpy (so->so_name, so->so_original_name);
+}
+
/* LOCAL FUNCTION
free_so --- free a `struct so_list' object
DESCRIPTION
Free the storage associated with the `struct so_list' object SO.
- If we have opened a BFD for SO, close it.
+ If we have opened a BFD for SO, close it.
The caller is responsible for removing SO from whatever list it is
a member of. If we have placed SO's sections in some target's
{
struct target_so_ops *ops = solib_ops (target_gdbarch);
- if (so->sections)
- xfree (so->sections);
-
- gdb_bfd_unref (so->abfd);
-
+ free_so_symbols (so);
ops->free_so (so);
xfree (so);
if (so->symbols_loaded)
{
- if (from_tty || info_verbose)
- printf_unfiltered (_("Symbols already loaded for %s\n"), so->so_name);
+ /* If needed, we've already warned in our caller. */
}
else if (so->abfd == NULL)
{
/* Have we already loaded this shared object? */
ALL_OBJFILES (so->objfile)
{
- if (strcmp (so->objfile->name, so->so_name) == 0)
+ if (filename_cmp (so->objfile->name, so->so_name) == 0
+ && so->objfile->addr_low == so->addr_low)
break;
}
if (so->objfile != NULL)
sap = build_section_addr_info_from_section_table (so->sections,
so->sections_end);
so->objfile = symbol_file_add_from_bfd (so->abfd,
- flags, sap, OBJF_SHARED);
+ flags, sap, OBJF_SHARED,
+ NULL);
+ so->objfile->addr_low = so->addr_low;
free_section_addr_info (sap);
}
if (e.reason < 0)
- {
- if (from_tty)
- exception_fprintf
- (gdb_stderr, e,
- _("Error while reading shared library symbols:\n"));
- }
+ exception_fprintf (gdb_stderr, e, _("Error while reading shared"
+ " library symbols for %s:\n"),
+ so->so_name);
else
{
if (from_tty || info_verbose)
}
else
{
- if (! strcmp (gdb->so_original_name, i->so_original_name))
+ if (! filename_cmp (gdb->so_original_name, i->so_original_name))
break;
}
}
if (e.reason < 0)
- exception_fprintf (gdb_stderr, e, _("\
-Error while mapping shared library sections:\n"));
+ exception_fprintf (gdb_stderr, e,
+ _("Error while mapping shared "
+ "library sections:\n"));
/* Notify any observer that the shared object has been
loaded now that we've added it to GDB's tables. */
stand out well. */
if (not_found == 1)
- warning (_("\
-Could not load shared library symbols for %s.\n\
-Do you need \"set solib-search-path\" or \"set sysroot\"?"),
+ warning (_("Could not load shared library symbols for %s.\n"
+ "Do you need \"set solib-search-path\" "
+ "or \"set sysroot\"?"),
not_found_filename);
else if (not_found > 1)
warning (_("\
FROM_TTY and TARGET are as described for update_solib_list, above. */
void
-solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms)
+solib_add (char *pattern, int from_tty,
+ struct target_ops *target, int readsyms)
{
struct so_list *gdb;
+ current_program_space->solib_add_generation++;
+
if (pattern)
{
char *re_err = re_comp (pattern);
(readsyms || libpthread_solib_p (gdb));
any_matches = 1;
- if (add_this_solib && solib_read_symbols (gdb, flags))
- loaded_any_symbols = 1;
+ if (add_this_solib)
+ {
+ if (gdb->symbols_loaded)
+ {
+ /* If no pattern was given, be quiet for shared
+ libraries we have already loaded. */
+ if (pattern && (from_tty || info_verbose))
+ printf_unfiltered (_("Symbols already loaded for %s\n"),
+ gdb->so_name);
+ }
+ else if (solib_read_symbols (gdb, flags))
+ loaded_any_symbols = 1;
+ }
}
if (loaded_any_symbols)
info_sharedlibrary_command (char *pattern, int from_tty)
{
struct so_list *so = NULL; /* link map state variable */
- int header_done = 0;
int so_missing_debug_info = 0;
int addr_width;
int nr_libs;
struct cleanup *table_cleanup;
struct gdbarch *gdbarch = target_gdbarch;
+ struct ui_out *uiout = current_uiout;
if (pattern)
{
{
if (so_missing_debug_info)
ui_out_message (uiout, 0,
- _("(*): Shared library is missing debugging information.\n"));
+ _("(*): Shared library is missing "
+ "debugging information.\n"));
}
}
while (so_list_head)
{
struct so_list *so = so_list_head;
+
so_list_head = so->next;
observer_notify_solib_unloaded (so);
if (so->abfd)
solib_create_inferior_hook (int from_tty)
{
struct target_so_ops *ops = solib_ops (target_gdbarch);
+
ops->solib_create_inferior_hook (from_tty);
}
in_solib_dynsym_resolve_code (CORE_ADDR pc)
{
struct target_so_ops *ops = solib_ops (target_gdbarch);
+
return ops->in_dynsym_resolve_code (pc);
}
objfile_purge_solibs ();
}
+/* Reload shared libraries, but avoid reloading the same symbol file
+ we already have loaded. */
+
+static void
+reload_shared_libraries_1 (int from_tty)
+{
+ struct so_list *so;
+ struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
+
+ for (so = so_list_head; so != NULL; so = so->next)
+ {
+ char *filename, *found_pathname = NULL;
+ bfd *abfd;
+ int was_loaded = so->symbols_loaded;
+ const int flags =
+ SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0);
+
+ filename = tilde_expand (so->so_original_name);
+ make_cleanup (xfree, filename);
+ abfd = solib_bfd_open (filename);
+ if (abfd != NULL)
+ {
+ found_pathname = xstrdup (bfd_get_filename (abfd));
+ make_cleanup (xfree, found_pathname);
+ gdb_bfd_close_or_warn (abfd);
+ }
+
+ /* If this shared library is no longer associated with its previous
+ symbol file, close that. */
+ if ((found_pathname == NULL && was_loaded)
+ || (found_pathname != NULL
+ && filename_cmp (found_pathname, so->so_name) != 0))
+ {
+ if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED))
+ free_objfile (so->objfile);
+ remove_target_sections (so->abfd);
+ free_so_symbols (so);
+ }
+
+ /* If this shared library is now associated with a new symbol
+ file, open it. */
+ if (found_pathname != NULL
+ && (!was_loaded
+ || filename_cmp (found_pathname, so->so_name) != 0))
+ {
+ volatile struct gdb_exception e;
+
+ TRY_CATCH (e, RETURN_MASK_ERROR)
+ solib_map_sections (so);
+
+ if (e.reason < 0)
+ exception_fprintf (gdb_stderr, e,
+ _("Error while mapping "
+ "shared library sections:\n"));
+ else if (auto_solib_add || was_loaded || libpthread_solib_p (so))
+ solib_read_symbols (so, flags);
+ }
+ }
+
+ do_cleanups (old_chain);
+}
+
static void
reload_shared_libraries (char *ignored, int from_tty,
struct cmd_list_element *e)
{
- no_shared_libraries (NULL, from_tty);
- /* Creating inferior hooks here has two purposes. First, if we reload
+ struct target_so_ops *ops;
+
+ reload_shared_libraries_1 (from_tty);
+
+ ops = solib_ops (target_gdbarch);
+
+ /* Creating inferior hooks here has two purposes. First, if we reload
shared libraries then the address of solib breakpoint we've computed
previously might be no longer valid. For example, if we forgot to set
solib-absolute-prefix and are setting it right now, then the previous
about ld.so. */
if (target_has_execution)
{
+ /* Reset or free private data structures not associated with
+ so_list entries. */
+ ops->clear_solib ();
+
+ /* Remove any previous solib event breakpoint. This is usually
+ done in common code, at breakpoint_init_inferior time, but
+ we're not really starting up the inferior here. */
+ remove_solib_event_breakpoints ();
+
#ifdef SOLIB_CREATE_INFERIOR_HOOK
SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
#else
solib_add (NULL, 0, NULL, auto_solib_add);
- /* We have unloaded and then reloaded debug info for all shared libraries.
- However, frames may still reference them, for example a frame's
- unwinder might still point of DWARF FDE structures that are now freed.
- Reinit frame cache to avoid crashing. */
+ breakpoint_re_set ();
+
+ /* We may have loaded or unloaded debug info for some (or all)
+ shared libraries. However, frames may still reference them. For
+ example, a frame's unwinder might still point at DWARF FDE
+ structures that are now freed. Also, getting new symbols may
+ change our opinion about what is frameless. */
reinit_frame_cache ();
+
+ ops->special_symbol_handling ();
}
static void
void
_initialize_solib (void)
{
- struct cmd_list_element *c;
-
solib_data = gdbarch_data_register_pre_init (solib_init);
add_com ("sharedlibrary", class_files, sharedlibrary_command,
If \"on\", symbols from all shared object libraries will be loaded\n\
automatically when the inferior begins execution, when the dynamic linker\n\
informs gdb that a new library has been loaded, or when attaching to the\n\
-inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
+inferior. Otherwise, symbols must be loaded manually, using \
+`sharedlibrary'."),
NULL,
show_auto_solib_add,
&setlist, &showlist);
add_setshow_optional_filename_cmd ("solib-search-path", class_support,
&solib_search_path, _("\
-Set the search path for loading non-absolute shared library symbol files."), _("\
-Show the search path for loading non-absolute shared library symbol files."), _("\
-This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
+Set the search path for loading non-absolute shared library symbol files."),
+ _("\
+Show the search path for loading non-absolute shared library symbol files."),
+ _("\
+This takes precedence over the environment variables \
+PATH and LD_LIBRARY_PATH."),
reload_shared_libraries,
show_solib_search_path,
&setlist, &showlist);
projects / deliverable / binutils-gdb.git / blobdiff