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   int tracepoint = 0;
  78   struct cleanup *back_to;
  79
  80   struct gdb_exception e;
  81   struct gdb_events *old_hooks;
  82   enum opt
  83     {
  84       HARDWARE_OPT, TEMP_OPT, CONDITION_OPT,
  85       IGNORE_COUNT_OPT, THREAD_OPT, PENDING_OPT, DISABLE_OPT,
  86       TRACEPOINT_OPT,
  87     };
  88   static struct mi_opt opts[] =
  89   {
  90     {"h", HARDWARE_OPT, 0},
  91     {"t", TEMP_OPT, 0},
  92     {"c", CONDITION_OPT, 1},
  93     {"i", IGNORE_COUNT_OPT, 1},
  94     {"p", THREAD_OPT, 1},
  95     {"f", PENDING_OPT, 0},
  96     {"d", DISABLE_OPT, 0},
  97     {"a", TRACEPOINT_OPT, 0},
  98     { 0, 0, 0 }
  99   };
 100
 101   /* Parse arguments. It could be -r or -h or -t, <location> or ``--''
 102      to denote the end of the option list. */
 103   int optind = 0;
 104   char *optarg;
 105   while (1)
 106     {
 107       int opt = mi_getopt ("mi_cmd_break_insert", argc, argv, opts, &optind, &optarg);
 108       if (opt < 0)
 109         break;
 110       switch ((enum opt) opt)
 111         {
 112         case TEMP_OPT:
 113           temp_p = 1;
 114           break;
 115         case HARDWARE_OPT:
 116           hardware = 1;
 117           break;
 118         case CONDITION_OPT:
 119           condition = optarg;
 120           break;
 121         case IGNORE_COUNT_OPT:
 122           ignore_count = atol (optarg);
 123           break;
 124         case THREAD_OPT:
 125           thread = atol (optarg);
 126           break;
 127         case PENDING_OPT:
 128           pending = 1;
 129           break;
 130         case DISABLE_OPT:
 131           enabled = 0;
 132           break;
 133         case TRACEPOINT_OPT:
 134           tracepoint = 1;
 135           break;
 136         }
 137     }
 138
 139   if (optind >= argc)
 140     error (_("mi_cmd_break_insert: Missing <location>"));
 141   if (optind < argc - 1)
 142     error (_("mi_cmd_break_insert: Garbage following <location>"));
 143   address = argv[optind];
 144
 145   /* Now we have what we need, let's insert the breakpoint! */
 146   if (! mi_breakpoint_observers_installed)
 147     {
 148       observer_attach_breakpoint_created (breakpoint_notify);
 149       observer_attach_breakpoint_modified (breakpoint_notify);
 150       observer_attach_breakpoint_deleted (breakpoint_notify);
 151       mi_breakpoint_observers_installed = 1;
 152     }
 153
 154   back_to = make_cleanup_restore_integer (&mi_can_breakpoint_notify);
 155   mi_can_breakpoint_notify = 1;
 156   create_breakpoint (get_current_arch (), address, condition, thread,
 157                      0 /* condition and thread are valid.  */,
 158                      temp_p, hardware, tracepoint,
 159                      ignore_count,
 160                      pending ? AUTO_BOOLEAN_TRUE : AUTO_BOOLEAN_FALSE,
 161                      NULL, 0, enabled);
 162   do_cleanups (back_to);
 163
 164 }
 165
 166 enum wp_type
 167 {
 168   REG_WP,
 169   READ_WP,
 170   ACCESS_WP
 171 };
 172
 173 /* Insert a watchpoint. The type of watchpoint is specified by the
 174    first argument:
 175    -break-watch <expr> --> insert a regular wp.
 176    -break-watch -r <expr> --> insert a read watchpoint.
 177    -break-watch -a <expr> --> insert an access wp. */
 178
 179 void
 180 mi_cmd_break_watch (char *command, char **argv, int argc)
 181 {
 182   char *expr = NULL;
 183   enum wp_type type = REG_WP;
 184   enum opt
 185     {
 186       READ_OPT, ACCESS_OPT
 187     };
 188   static struct mi_opt opts[] =
 189   {
 190     {"r", READ_OPT, 0},
 191     {"a", ACCESS_OPT, 0},
 192     { 0, 0, 0 }
 193   };
 194
 195   /* Parse arguments. */
 196   int optind = 0;
 197   char *optarg;
 198   while (1)
 199     {
 200       int opt = mi_getopt ("mi_cmd_break_watch", argc, argv, opts, &optind, &optarg);
 201       if (opt < 0)
 202         break;
 203       switch ((enum opt) opt)
 204         {
 205         case READ_OPT:
 206           type = READ_WP;
 207           break;
 208         case ACCESS_OPT:
 209           type = ACCESS_WP;
 210           break;
 211         }
 212     }
 213   if (optind >= argc)
 214     error (_("mi_cmd_break_watch: Missing <expression>"));
 215   if (optind < argc - 1)
 216     error (_("mi_cmd_break_watch: Garbage following <expression>"));
 217   expr = argv[optind];
 218
 219   /* Now we have what we need, let's insert the watchpoint! */
 220   switch (type)
 221     {
 222     case REG_WP:
 223       watch_command_wrapper (expr, FROM_TTY);
 224       break;
 225     case READ_WP:
 226       rwatch_command_wrapper (expr, FROM_TTY);
 227       break;
 228     case ACCESS_WP:
 229       awatch_command_wrapper (expr, FROM_TTY);
 230       break;
 231     default:
 232       error (_("mi_cmd_break_watch: Unknown watchpoint type."));
 233     }
 234 }
 235
 236 /* The mi_read_next_line consults these variable to return successive
 237    command lines.  While it would be clearer to use a closure pointer,
 238    it is not expected that any future code will use read_command_lines_1,
 239    therefore no point of overengineering.  */
 240
 241 static char **mi_command_line_array;
 242 static int mi_command_line_array_cnt;
 243 static int mi_command_line_array_ptr;
 244
 245 static char *
 246 mi_read_next_line (void)
 247 {
 248   if (mi_command_line_array_ptr == mi_command_line_array_cnt)
 249     return NULL;
 250   else
 251     return mi_command_line_array[mi_command_line_array_ptr++];
 252 }
 253
 254 void
 255 mi_cmd_break_commands (char *command, char **argv, int argc)
 256 {
 257   struct command_line *break_command;
 258   char *endptr;
 259   int bnum;
 260   struct breakpoint *b;
 261
 262   if (argc < 1)
 263     error ("USAGE: %s <BKPT> [<COMMAND> [<COMMAND>...]]", command);
 264
 265   bnum = strtol (argv[0], &endptr, 0);
 266   if (endptr == argv[0])
 267     error ("breakpoint number argument \"%s\" is not a number.",
 268            argv[0]);
 269   else if (*endptr != '\0')
 270     error ("junk at the end of breakpoint number argument \"%s\".",
 271            argv[0]);
 272
 273   b = get_breakpoint (bnum);
 274   if (b == NULL)
 275     error ("breakpoint %d not found.", bnum);
 276
 277   mi_command_line_array = argv;
 278   mi_command_line_array_ptr = 1;
 279   mi_command_line_array_cnt = argc;
 280
 281   if (breakpoint_is_tracepoint (b))
 282     break_command = read_command_lines_1 (mi_read_next_line, 1,
 283                                           check_tracepoint_command, b);
 284   else
 285     break_command = read_command_lines_1 (mi_read_next_line, 1, 0, 0);
 286
 287   breakpoint_set_commands (b, break_command);
 288 }
 289