/* Work with executable files, for GDB.
- Copyright (C) 1988-2014 Free Software Foundation, Inc.
+ Copyright (C) 1988-2016 Free Software Foundation, Inc.
This file is part of GDB.
#include <ctype.h>
#include <sys/stat.h>
+#include "solist.h"
+#include <algorithm>
void (*deprecated_file_changed_hook) (char *);
printf_unfiltered (_("No executable file now.\n"));
}
+/* Returns non-zero if exceptions E1 and E2 are equal. Returns zero
+ otherwise. */
+
+static int
+exception_print_same (struct gdb_exception e1, struct gdb_exception e2)
+{
+ const char *msg1 = e1.message;
+ const char *msg2 = e2.message;
+
+ if (msg1 == NULL)
+ msg1 = "";
+ if (msg2 == NULL)
+ msg2 = "";
+
+ return (e1.reason == e2.reason
+ && e1.error == e2.error
+ && strcmp (msg1, msg2) == 0);
+}
+
+/* See gdbcore.h. */
+
+void
+exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty)
+{
+ char *exec_file, *full_exec_path = NULL;
+ struct cleanup *old_chain;
+ struct gdb_exception prev_err = exception_none;
+
+ /* Do nothing if we already have an executable filename. */
+ exec_file = (char *) get_exec_file (0);
+ if (exec_file != NULL)
+ return;
+
+ /* Try to determine a filename from the process itself. */
+ exec_file = target_pid_to_exec_file (pid);
+ if (exec_file == NULL)
+ {
+ warning (_("No executable has been specified and target does not "
+ "support\n"
+ "determining executable automatically. "
+ "Try using the \"file\" command."));
+ return;
+ }
+
+ /* If gdb_sysroot is not empty and the discovered filename
+ is absolute then prefix the filename with gdb_sysroot. */
+ if (*gdb_sysroot != '\0' && IS_ABSOLUTE_PATH (exec_file))
+ {
+ full_exec_path = exec_file_find (exec_file, NULL);
+ if (full_exec_path == NULL)
+ return;
+ }
+ else
+ {
+ /* It's possible we don't have a full path, but rather just a
+ filename. Some targets, such as HP-UX, don't provide the
+ full path, sigh.
+
+ Attempt to qualify the filename against the source path.
+ (If that fails, we'll just fall back on the original
+ filename. Not much more we can do...) */
+ if (!source_full_path_of (exec_file, &full_exec_path))
+ full_exec_path = xstrdup (exec_file);
+ }
+
+ old_chain = make_cleanup (xfree, full_exec_path);
+ make_cleanup (free_current_contents, &prev_err.message);
+
+ /* exec_file_attach and symbol_file_add_main may throw an error if the file
+ cannot be opened either locally or remotely.
+
+ This happens for example, when the file is first found in the local
+ sysroot (above), and then disappears (a TOCTOU race), or when it doesn't
+ exist in the target filesystem, or when the file does exist, but
+ is not readable.
+
+ Even without a symbol file, the remote-based debugging session should
+ continue normally instead of ending abruptly. Hence we catch thrown
+ errors/exceptions in the following code. */
+ TRY
+ {
+ exec_file_attach (full_exec_path, from_tty);
+ }
+ CATCH (err, RETURN_MASK_ERROR)
+ {
+ if (err.message != NULL)
+ warning ("%s", err.message);
+
+ prev_err = err;
+
+ /* Save message so it doesn't get trashed by the catch below. */
+ prev_err.message = xstrdup (err.message);
+ }
+ END_CATCH
+
+ TRY
+ {
+ if (defer_bp_reset)
+ current_inferior ()->symfile_flags |= SYMFILE_DEFER_BP_RESET;
+ symbol_file_add_main (full_exec_path, from_tty);
+ }
+ CATCH (err, RETURN_MASK_ERROR)
+ {
+ if (!exception_print_same (prev_err, err))
+ warning ("%s", err.message);
+ }
+ END_CATCH
+ current_inferior ()->symfile_flags &= ~SYMFILE_DEFER_BP_RESET;
+
+ do_cleanups (old_chain);
+}
+
/* Set FILENAME as the new exec file.
This function is intended to be behave essentially the same
}
else
{
+ int load_via_target = 0;
char *scratch_pathname, *canonical_pathname;
int scratch_chan;
struct target_section *sections = NULL, *sections_end = NULL;
char **matching;
- scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename,
- write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
- &scratch_pathname);
-#if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
- if (scratch_chan < 0)
+ if (is_target_filename (filename))
+ {
+ if (target_filesystem_is_local ())
+ filename += strlen (TARGET_SYSROOT_PREFIX);
+ else
+ load_via_target = 1;
+ }
+
+ if (load_via_target)
{
- char *exename = alloca (strlen (filename) + 5);
+ /* gdb_bfd_fopen does not support "target:" filenames. */
+ if (write_files)
+ warning (_("writing into executable files is "
+ "not supported for %s sysroots"),
+ TARGET_SYSROOT_PREFIX);
- strcat (strcpy (exename, filename), ".exe");
- scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
- write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
- &scratch_pathname);
+ scratch_pathname = xstrdup (filename);
+ make_cleanup (xfree, scratch_pathname);
+
+ scratch_chan = -1;
+
+ canonical_pathname = scratch_pathname;
}
+ else
+ {
+ scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST,
+ filename, write_files ?
+ O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
+ &scratch_pathname);
+#if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
+ if (scratch_chan < 0)
+ {
+ char *exename = (char *) alloca (strlen (filename) + 5);
+
+ strcat (strcpy (exename, filename), ".exe");
+ scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST,
+ exename, write_files ?
+ O_RDWR | O_BINARY
+ : O_RDONLY | O_BINARY,
+ &scratch_pathname);
+ }
#endif
- if (scratch_chan < 0)
- perror_with_name (filename);
+ if (scratch_chan < 0)
+ perror_with_name (filename);
- make_cleanup (xfree, scratch_pathname);
+ make_cleanup (xfree, scratch_pathname);
- /* gdb_bfd_open (and its variants) prefers canonicalized pathname for
- better BFD caching. */
- canonical_pathname = gdb_realpath (scratch_pathname);
- make_cleanup (xfree, canonical_pathname);
+ /* gdb_bfd_open (and its variants) prefers canonicalized
+ pathname for better BFD caching. */
+ canonical_pathname = gdb_realpath (scratch_pathname);
+ make_cleanup (xfree, canonical_pathname);
+ }
- if (write_files)
+ if (write_files && !load_via_target)
exec_bfd = gdb_bfd_fopen (canonical_pathname, gnutarget,
FOPEN_RUB, scratch_chan);
else
if (!exec_bfd)
{
- error (_("\"%s\": could not open as an executable file: %s"),
+ error (_("\"%s\": could not open as an executable file: %s."),
scratch_pathname, bfd_errmsg (bfd_get_error ()));
}
+ /* gdb_realpath_keepfile resolves symlinks on the local
+ filesystem and so cannot be used for "target:" files. */
gdb_assert (exec_filename == NULL);
- exec_filename = gdb_realpath_keepfile (scratch_pathname);
+ if (load_via_target)
+ exec_filename = xstrdup (bfd_get_filename (exec_bfd));
+ else
+ exec_filename = gdb_realpath_keepfile (scratch_pathname);
if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching))
{
if (new_count)
{
- table->sections = xrealloc (table->sections,
- sizeof (struct target_section) * new_count);
+ table->sections = XRESIZEVEC (struct target_section, table->sections,
+ new_count);
table->sections_end = table->sections + new_count;
}
else
count = bfd_count_sections (some_bfd);
if (*start)
xfree (* start);
- *start = (struct target_section *) xmalloc (count * sizeof (**start));
+ *start = XNEWVEC (struct target_section, count);
*end = *start;
bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end);
if (*end > *start + count)
r = VEC_safe_push (mem_range_s, memory, NULL);
- r->start = max (lo1, lo2);
- r->length = min (hi1, hi2) - r->start;
+ r->start = std::max (lo1, lo2);
+ r->length = std::min (hi1, hi2) - r->start;
}
}
enum target_xfer_status status;
/* Get the intersection window. */
- end = min (offset + len, r->start + r->length);
+ end = std::min<CORE_ADDR> (offset + len, r->start + r->length);
gdb_assert (end - offset <= len);
return 0;
}
+/* Implement the to_remove_breakpoint method. */
+
+static int
+exec_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt,
+ enum remove_bp_reason reason)
+{
+ return 0;
+}
+
static int
exec_has_memory (struct target_ops *ops)
{
exec_ops.to_get_section_table = exec_get_section_table;
exec_ops.to_files_info = exec_files_info;
exec_ops.to_insert_breakpoint = ignore;
- exec_ops.to_remove_breakpoint = ignore;
+ exec_ops.to_remove_breakpoint = exec_remove_breakpoint;
exec_ops.to_stratum = file_stratum;
exec_ops.to_has_memory = exec_has_memory;
exec_ops.to_make_corefile_notes = exec_make_note_section;
projects / deliverable / binutils-gdb.git / blobdiff