/* Reverse execution and reverse debugging.
- Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2006-2020 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "gdb_string.h"
#include "target.h"
#include "top.h"
#include "cli/cli-cmds.h"
#include "cli/cli-decode.h"
+#include "cli/cli-utils.h"
#include "inferior.h"
+#include "infrun.h"
+#include "regcache.h"
/* User interface:
reverse-step, reverse-next etc. */
-static void
-exec_direction_default (void *notused)
-{
- /* Return execution direction to default state. */
- execution_direction = EXEC_FORWARD;
-}
-
/* exec_reverse_once -- accepts an arbitrary gdb command (string),
and executes it with exec-direction set to 'reverse'.
Used to implement reverse-next etc. commands. */
static void
-exec_reverse_once (char *cmd, char *args, int from_tty)
+exec_reverse_once (const char *cmd, const char *args, int from_tty)
{
- char *reverse_command;
enum exec_direction_kind dir = execution_direction;
- struct cleanup *old_chain;
-
- if (dir == EXEC_ERROR)
- error (_("Target %s does not support this command."), target_shortname);
if (dir == EXEC_REVERSE)
error (_("Already in reverse mode. Use '%s' or 'set exec-dir forward'."),
if (!target_can_execute_reverse)
error (_("Target %s does not support this command."), target_shortname);
- reverse_command = xstrprintf ("%s %s", cmd, args ? args : "");
- old_chain = make_cleanup (exec_direction_default, NULL);
- make_cleanup (xfree, reverse_command);
- execution_direction = EXEC_REVERSE;
- execute_command (reverse_command, from_tty);
- do_cleanups (old_chain);
+ std::string reverse_command = string_printf ("%s %s", cmd, args ? args : "");
+ scoped_restore restore_exec_dir
+ = make_scoped_restore (&execution_direction, EXEC_REVERSE);
+ execute_command (reverse_command.c_str (), from_tty);
}
static void
-reverse_step (char *args, int from_tty)
+reverse_step (const char *args, int from_tty)
{
exec_reverse_once ("step", args, from_tty);
}
static void
-reverse_stepi (char *args, int from_tty)
+reverse_stepi (const char *args, int from_tty)
{
exec_reverse_once ("stepi", args, from_tty);
}
static void
-reverse_next (char *args, int from_tty)
+reverse_next (const char *args, int from_tty)
{
exec_reverse_once ("next", args, from_tty);
}
static void
-reverse_nexti (char *args, int from_tty)
+reverse_nexti (const char *args, int from_tty)
{
exec_reverse_once ("nexti", args, from_tty);
}
static void
-reverse_continue (char *args, int from_tty)
+reverse_continue (const char *args, int from_tty)
{
exec_reverse_once ("continue", args, from_tty);
}
static void
-reverse_finish (char *args, int from_tty)
+reverse_finish (const char *args, int from_tty)
{
exec_reverse_once ("finish", args, from_tty);
}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern initialize_file_ftype _initialize_reverse;
+/* Data structures for a bookmark list. */
+
+struct bookmark {
+ struct bookmark *next;
+ int number;
+ CORE_ADDR pc;
+ struct symtab_and_line sal;
+ gdb_byte *opaque_data;
+};
+
+static struct bookmark *bookmark_chain;
+static int bookmark_count;
+
+#define ALL_BOOKMARKS(B) for ((B) = bookmark_chain; (B); (B) = (B)->next)
+
+#define ALL_BOOKMARKS_SAFE(B,TMP) \
+ for ((B) = bookmark_chain; \
+ (B) ? ((TMP) = (B)->next, 1) : 0; \
+ (B) = (TMP))
+
+/* save_bookmark_command -- implement "bookmark" command.
+ Call target method to get a bookmark identifier.
+ Insert bookmark identifier into list.
+
+ Identifier will be a malloc string (gdb_byte *).
+ Up to us to free it as required. */
+
+static void
+save_bookmark_command (const char *args, int from_tty)
+{
+ /* Get target's idea of a bookmark. */
+ gdb_byte *bookmark_id = target_get_bookmark (args, from_tty);
+ struct gdbarch *gdbarch = get_current_regcache ()->arch ();
+
+ /* CR should not cause another identical bookmark. */
+ dont_repeat ();
+
+ if (bookmark_id == NULL)
+ error (_("target_get_bookmark failed."));
+
+ /* Set up a bookmark struct. */
+ bookmark *b = new bookmark ();
+ b->number = ++bookmark_count;
+ b->pc = regcache_read_pc (get_current_regcache ());
+ b->sal = find_pc_line (b->pc, 0);
+ b->sal.pspace = get_frame_program_space (get_current_frame ());
+ b->opaque_data = bookmark_id;
+ b->next = NULL;
+
+ /* Add this bookmark to the end of the chain, so that a list
+ of bookmarks will come out in order of increasing numbers. */
+
+ bookmark *b1 = bookmark_chain;
+ if (b1 == 0)
+ bookmark_chain = b;
+ else
+ {
+ while (b1->next)
+ b1 = b1->next;
+ b1->next = b;
+ }
+ printf_filtered (_("Saved bookmark %d at %s\n"), b->number,
+ paddress (gdbarch, b->sal.pc));
+}
+
+/* Implement "delete bookmark" command. */
+
+static int
+delete_one_bookmark (int num)
+{
+ struct bookmark *b1, *b;
+
+ /* Find bookmark with corresponding number. */
+ ALL_BOOKMARKS (b)
+ if (b->number == num)
+ break;
+
+ /* Special case, first item in list. */
+ if (b == bookmark_chain)
+ bookmark_chain = b->next;
+
+ /* Find bookmark preceding "marked" one, so we can unlink. */
+ if (b)
+ {
+ ALL_BOOKMARKS (b1)
+ if (b1->next == b)
+ {
+ /* Found designated bookmark. Unlink and delete. */
+ b1->next = b->next;
+ break;
+ }
+ xfree (b->opaque_data);
+ delete b;
+ return 1; /* success */
+ }
+ return 0; /* failure */
+}
+
+static void
+delete_all_bookmarks (void)
+{
+ struct bookmark *b, *b1;
+
+ ALL_BOOKMARKS_SAFE (b, b1)
+ {
+ xfree (b->opaque_data);
+ xfree (b);
+ }
+ bookmark_chain = NULL;
+}
+
+static void
+delete_bookmark_command (const char *args, int from_tty)
+{
+ if (bookmark_chain == NULL)
+ {
+ warning (_("No bookmarks."));
+ return;
+ }
+
+ if (args == NULL || args[0] == '\0')
+ {
+ if (from_tty && !query (_("Delete all bookmarks? ")))
+ return;
+ delete_all_bookmarks ();
+ return;
+ }
+
+ number_or_range_parser parser (args);
+ while (!parser.finished ())
+ {
+ int num = parser.get_number ();
+ if (!delete_one_bookmark (num))
+ /* Not found. */
+ warning (_("No bookmark #%d."), num);
+ }
+}
+
+/* Implement "goto-bookmark" command. */
+
+static void
+goto_bookmark_command (const char *args, int from_tty)
+{
+ struct bookmark *b;
+ unsigned long num;
+ const char *p = args;
+
+ if (args == NULL || args[0] == '\0')
+ error (_("Command requires an argument."));
+
+ if (startswith (args, "start")
+ || startswith (args, "begin")
+ || startswith (args, "end"))
+ {
+ /* Special case. Give target opportunity to handle. */
+ target_goto_bookmark ((gdb_byte *) args, from_tty);
+ return;
+ }
+
+ if (args[0] == '\'' || args[0] == '\"')
+ {
+ /* Special case -- quoted string. Pass on to target. */
+ if (args[strlen (args) - 1] != args[0])
+ error (_("Unbalanced quotes: %s"), args);
+ target_goto_bookmark ((gdb_byte *) args, from_tty);
+ return;
+ }
+
+ /* General case. Bookmark identified by bookmark number. */
+ num = get_number (&args);
+
+ if (num == 0)
+ error (_("goto-bookmark: invalid bookmark number '%s'."), p);
+
+ ALL_BOOKMARKS (b)
+ if (b->number == num)
+ break;
+
+ if (b)
+ {
+ /* Found. Send to target method. */
+ target_goto_bookmark (b->opaque_data, from_tty);
+ return;
+ }
+ /* Not found. */
+ error (_("goto-bookmark: no bookmark found for '%s'."), p);
+}
+
+static int
+bookmark_1 (int bnum)
+{
+ struct gdbarch *gdbarch = get_current_regcache ()->arch ();
+ struct bookmark *b;
+ int matched = 0;
+
+ ALL_BOOKMARKS (b)
+ {
+ if (bnum == -1 || bnum == b->number)
+ {
+ printf_filtered (" %d %s '%s'\n",
+ b->number,
+ paddress (gdbarch, b->pc),
+ b->opaque_data);
+ matched++;
+ }
+ }
+
+ if (bnum > 0 && matched == 0)
+ printf_filtered ("No bookmark #%d\n", bnum);
+
+ return matched;
+}
+
+/* Implement "info bookmarks" command. */
+
+static void
+info_bookmarks_command (const char *args, int from_tty)
+{
+ if (!bookmark_chain)
+ printf_filtered (_("No bookmarks.\n"));
+ else if (args == NULL || *args == '\0')
+ bookmark_1 (-1);
+ else
+ {
+ number_or_range_parser parser (args);
+ while (!parser.finished ())
+ {
+ int bnum = parser.get_number ();
+ bookmark_1 (bnum);
+ }
+ }
+}
void
_initialize_reverse (void)
add_com ("reverse-finish", class_run, reverse_finish, _("\
Execute backward until just before selected stack frame is called."));
+
+ add_com ("bookmark", class_bookmark, save_bookmark_command, _("\
+Set a bookmark in the program's execution history.\n\
+A bookmark represents a point in the execution history \n\
+that can be returned to at a later point in the debug session."));
+ add_info ("bookmarks", info_bookmarks_command, _("\
+Status of user-settable bookmarks.\n\
+Bookmarks are user-settable markers representing a point in the \n\
+execution history that can be returned to later in the same debug \n\
+session."));
+ add_cmd ("bookmark", class_bookmark, delete_bookmark_command, _("\
+Delete a bookmark from the bookmark list.\n\
+Argument is a bookmark number or numbers,\n\
+ or no argument to delete all bookmarks."),
+ &deletelist);
+ add_com ("goto-bookmark", class_bookmark, goto_bookmark_command, _("\
+Go to an earlier-bookmarked point in the program's execution history.\n\
+Argument is the bookmark number of a bookmark saved earlier by using \n\
+the 'bookmark' command, or the special arguments:\n\
+ start (beginning of recording)\n\
+ end (end of recording)"));
}
projects / deliverable / binutils-gdb.git / blobdiff