| /* Reverse execution and reverse debugging. |
| |
| Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "defs.h" |
| #include "gdb_string.h" |
| #include "target.h" |
| #include "top.h" |
| #include "cli/cli-cmds.h" |
| #include "cli/cli-decode.h" |
| #include "inferior.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) |
| { |
| 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'."), |
| cmd); |
| |
| 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); |
| } |
| |
| static void |
| reverse_step (char *args, int from_tty) |
| { |
| exec_reverse_once ("step", args, from_tty); |
| } |
| |
| static void |
| reverse_stepi (char *args, int from_tty) |
| { |
| exec_reverse_once ("stepi", args, from_tty); |
| } |
| |
| static void |
| reverse_next (char *args, int from_tty) |
| { |
| exec_reverse_once ("next", args, from_tty); |
| } |
| |
| static void |
| reverse_nexti (char *args, int from_tty) |
| { |
| exec_reverse_once ("nexti", args, from_tty); |
| } |
| |
| static void |
| reverse_continue (char *args, int from_tty) |
| { |
| exec_reverse_once ("continue", args, from_tty); |
| } |
| |
| static void |
| reverse_finish (char *args, int from_tty) |
| { |
| exec_reverse_once ("finish", args, from_tty); |
| } |
| |
| void |
| _initialize_reverse (void) |
| { |
| add_com ("reverse-step", class_run, reverse_step, _("\ |
| Step program backward until it reaches the beginning of another source line.\n\ |
| Argument N means do this N times (or till program stops for another reason).") |
| ); |
| add_com_alias ("rs", "reverse-step", class_alias, 1); |
| |
| add_com ("reverse-next", class_run, reverse_next, _("\ |
| Step program backward, proceeding through subroutine calls.\n\ |
| Like the \"reverse-step\" command as long as subroutine calls do not happen;\n\ |
| when they do, the call is treated as one instruction.\n\ |
| Argument N means do this N times (or till program stops for another reason).") |
| ); |
| add_com_alias ("rn", "reverse-next", class_alias, 1); |
| |
| add_com ("reverse-stepi", class_run, reverse_stepi, _("\ |
| Step backward exactly one instruction.\n\ |
| Argument N means do this N times (or till program stops for another reason).") |
| ); |
| add_com_alias ("rsi", "reverse-stepi", class_alias, 0); |
| |
| add_com ("reverse-nexti", class_run, reverse_nexti, _("\ |
| Step backward one instruction, but proceed through called subroutines.\n\ |
| Argument N means do this N times (or till program stops for another reason).") |
| ); |
| add_com_alias ("rni", "reverse-nexti", class_alias, 0); |
| |
| add_com ("reverse-continue", class_run, reverse_continue, _("\ |
| Continue program being debugged but run it in reverse.\n\ |
| If proceeding from breakpoint, a number N may be used as an argument,\n\ |
| which means to set the ignore count of that breakpoint to N - 1 (so that\n\ |
| the breakpoint won't break until the Nth time it is reached).")); |
| add_com_alias ("rc", "reverse-continue", class_alias, 0); |
| |
| add_com ("reverse-finish", class_run, reverse_finish, _("\ |
| Execute backward until just before selected stack frame is called.")); |
| } |