gdb/mi/mi-cmd-break.c

   1 /* MI Command Set - breakpoint and watchpoint commands.
   2    Copyright (C) 2000, 2001, 2002, 2007, 2008, 2009, 2010
   3    Free Software Foundation, Inc.
   4    Contributed by Cygnus Solutions (a Red Hat company).
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "arch-utils.h"
  23 #include "mi-cmds.h"
  24 #include "ui-out.h"
  25 #include "mi-out.h"
  26 #include "breakpoint.h"
  27 #include "gdb_string.h"
  28 #include "mi-getopt.h"
  29 #include "gdb.h"
  30 #include "exceptions.h"
  31 #include "observer.h"
  32
  33 enum
  34   {
  35     FROM_TTY = 0
  36   };
  37
  38 /* True if MI breakpoint observers have been registered.  */
  39
  40 static int mi_breakpoint_observers_installed;
  41
  42 /* Control whether breakpoint_notify may act.  */
  43
  44 static int mi_can_breakpoint_notify;
  45
  46 /* Output a single breakpoint, when allowed. */
  47
  48 static void
  49 breakpoint_notify (int b)
  50 {
  51   if (mi_can_breakpoint_notify)
  52     gdb_breakpoint_query (uiout, b, NULL);
  53 }
  54
  55 enum bp_type
  56   {
  57     REG_BP,
  58     HW_BP,
  59     REGEXP_BP
  60   };
  61
  62 /* Implements the -break-insert command.
  63    See the MI manual for the list of possible options.  */
  64
  65 void
  66 mi_cmd_break_insert (char *command, char **argv, int argc)
  67 {
  68   char *address = NULL;
  69   enum bp_type type = REG_BP;
  70   int hardware = 0;
  71   int temp_p = 0;
  72   int thread = -1;
  73   int ignore_count = 0;
  74   char *condition = NULL;
  75   int pending = 0;
  76   int enabled = 1;
  77   struct cleanup *back_to;
  78
  79   struct gdb_exception e;
  80   struct gdb_events *old_hooks;
  81   enum opt
  82     {
  83       HARDWARE_OPT, TEMP_OPT, CONDITION_OPT,
  84       IGNORE_COUNT_OPT, THREAD_OPT, PENDING_OPT, DISABLE_OPT
  85     };
  86   static struct mi_opt opts[] =
  87   {
  88     {"h", HARDWARE_OPT, 0},
  89     {"t", TEMP_OPT, 0},
  90     {"c", CONDITION_OPT, 1},
  91     {"i", IGNORE_COUNT_OPT, 1},
  92     {"p", THREAD_OPT, 1},
  93     {"f", PENDING_OPT, 0},
  94     {"d", DISABLE_OPT, 0},
  95     { 0, 0, 0 }
  96   };
  97
  98   /* Parse arguments. It could be -r or -h or -t, <location> or ``--''
  99      to denote the end of the option list. */
 100   int optind = 0;
 101   char *optarg;
 102   while (1)
 103     {
 104       int opt = mi_getopt ("mi_cmd_break_insert", argc, argv, opts, &optind, &optarg);
 105       if (opt < 0)
 106         break;
 107       switch ((enum opt) opt)
 108         {
 109         case TEMP_OPT:
 110           temp_p = 1;
 111           break;
 112         case HARDWARE_OPT:
 113           hardware = 1;
 114           break;
 115         case CONDITION_OPT:
 116           condition = optarg;
 117           break;
 118         case IGNORE_COUNT_OPT:
 119           ignore_count = atol (optarg);
 120           break;
 121         case THREAD_OPT:
 122           thread = atol (optarg);
 123           break;
 124         case PENDING_OPT:
 125           pending = 1;
 126           break;
 127         case DISABLE_OPT:
 128           enabled = 0;
 129         }
 130     }
 131
 132   if (optind >= argc)
 133     error (_("mi_cmd_break_insert: Missing <location>"));
 134   if (optind < argc - 1)
 135     error (_("mi_cmd_break_insert: Garbage following <location>"));
 136   address = argv[optind];
 137
 138   /* Now we have what we need, let's insert the breakpoint! */
 139   if (! mi_breakpoint_observers_installed)
 140     {
 141       observer_attach_breakpoint_created (breakpoint_notify);
 142       observer_attach_breakpoint_modified (breakpoint_notify);
 143       observer_attach_breakpoint_deleted (breakpoint_notify);
 144       mi_breakpoint_observers_installed = 1;
 145     }
 146
 147   back_to = make_cleanup_restore_integer (&mi_can_breakpoint_notify);
 148   mi_can_breakpoint_notify = 1;
 149   create_breakpoint (get_current_arch (), address, condition, thread,
 150                      0 /* condition and thread are valid.  */,
 151                      temp_p, hardware, 0 /* traceflag */,
 152                      ignore_count,
 153                      pending ? AUTO_BOOLEAN_TRUE : AUTO_BOOLEAN_FALSE,
 154                      NULL, 0, enabled);
 155   do_cleanups (back_to);
 156
 157 }
 158
 159 enum wp_type
 160 {
 161   REG_WP,
 162   READ_WP,
 163   ACCESS_WP
 164 };
 165
 166 /* Insert a watchpoint. The type of watchpoint is specified by the
 167    first argument:
 168    -break-watch <expr> --> insert a regular wp.
 169    -break-watch -r <expr> --> insert a read watchpoint.
 170    -break-watch -a <expr> --> insert an access wp. */
 171
 172 void
 173 mi_cmd_break_watch (char *command, char **argv, int argc)
 174 {
 175   char *expr = NULL;
 176   enum wp_type type = REG_WP;
 177   enum opt
 178     {
 179       READ_OPT, ACCESS_OPT
 180     };
 181   static struct mi_opt opts[] =
 182   {
 183     {"r", READ_OPT, 0},
 184     {"a", ACCESS_OPT, 0},
 185     { 0, 0, 0 }
 186   };
 187
 188   /* Parse arguments. */
 189   int optind = 0;
 190   char *optarg;
 191   while (1)
 192     {
 193       int opt = mi_getopt ("mi_cmd_break_watch", argc, argv, opts, &optind, &optarg);
 194       if (opt < 0)
 195         break;
 196       switch ((enum opt) opt)
 197         {
 198         case READ_OPT:
 199           type = READ_WP;
 200           break;
 201         case ACCESS_OPT:
 202           type = ACCESS_WP;
 203           break;
 204         }
 205     }
 206   if (optind >= argc)
 207     error (_("mi_cmd_break_watch: Missing <expression>"));
 208   if (optind < argc - 1)
 209     error (_("mi_cmd_break_watch: Garbage following <expression>"));
 210   expr = argv[optind];
 211
 212   /* Now we have what we need, let's insert the watchpoint! */
 213   switch (type)
 214     {
 215     case REG_WP:
 216       watch_command_wrapper (expr, FROM_TTY);
 217       break;
 218     case READ_WP:
 219       rwatch_command_wrapper (expr, FROM_TTY);
 220       break;
 221     case ACCESS_WP:
 222       awatch_command_wrapper (expr, FROM_TTY);
 223       break;
 224     default:
 225       error (_("mi_cmd_break_watch: Unknown watchpoint type."));
 226     }
 227 }
 228
 229 /* The mi_read_next_line consults these variable to return successive
 230    command lines.  While it would be clearer to use a closure pointer,
 231    it is not expected that any future code will use read_command_lines_1,
 232    therefore no point of overengineering.  */
 233
 234 static char **mi_command_line_array;
 235 static int mi_command_line_array_cnt;
 236 static int mi_command_line_array_ptr;
 237
 238 static char *
 239 mi_read_next_line (void)
 240 {
 241   if (mi_command_line_array_ptr == mi_command_line_array_cnt)
 242     return NULL;
 243   else
 244     return mi_command_line_array[mi_command_line_array_ptr++];
 245 }
 246
 247 void
 248 mi_cmd_break_commands (char *command, char **argv, int argc)
 249 {
 250   struct command_line *break_command;
 251   char *endptr;
 252   int bnum;
 253   struct breakpoint *b;
 254
 255   if (argc < 1)
 256     error ("USAGE: %s <BKPT> [<COMMAND> [<COMMAND>...]]", command);
 257
 258   bnum = strtol (argv[0], &endptr, 0);
 259   if (endptr == argv[0])
 260     error ("breakpoint number argument \"%s\" is not a number.",
 261            argv[0]);
 262   else if (*endptr != '\0')
 263     error ("junk at the end of breakpoint number argument \"%s\".",
 264            argv[0]);
 265
 266   b = get_breakpoint (bnum);
 267   if (b == NULL)
 268     error ("breakpoint %d not found.", bnum);
 269
 270   mi_command_line_array = argv;
 271   mi_command_line_array_ptr = 1;
 272   mi_command_line_array_cnt = argc;
 273
 274   break_command = read_command_lines_1 (mi_read_next_line, 1);
 275   breakpoint_set_commands (b, break_command);
 276 }
 277