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 int hardware = 0; 70 int temp_p = 0; 71 int thread = -1; 72 int ignore_count = 0; 73 char *condition = NULL; 74 int pending = 0; 75 int enabled = 1; 76 int tracepoint = 0; 77 struct cleanup *back_to; 78 enum bptype type_wanted; 79 80 enum opt 81 { 82 HARDWARE_OPT, TEMP_OPT, CONDITION_OPT, 83 IGNORE_COUNT_OPT, THREAD_OPT, PENDING_OPT, DISABLE_OPT, 84 TRACEPOINT_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 {"a", TRACEPOINT_OPT, 0}, 96 { 0, 0, 0 } 97 }; 98 99 /* Parse arguments. It could be -r or -h or -t, <location> or ``--'' 100 to denote the end of the option list. */ 101 int optind = 0; 102 char *optarg; 103 104 while (1) 105 { 106 int opt = mi_getopt ("mi_cmd_break_insert", argc, argv, opts, &optind, &optarg); 107 if (opt < 0) 108 break; 109 switch ((enum opt) opt) 110 { 111 case TEMP_OPT: 112 temp_p = 1; 113 break; 114 case HARDWARE_OPT: 115 hardware = 1; 116 break; 117 case CONDITION_OPT: 118 condition = optarg; 119 break; 120 case IGNORE_COUNT_OPT: 121 ignore_count = atol (optarg); 122 break; 123 case THREAD_OPT: 124 thread = atol (optarg); 125 break; 126 case PENDING_OPT: 127 pending = 1; 128 break; 129 case DISABLE_OPT: 130 enabled = 0; 131 break; 132 case TRACEPOINT_OPT: 133 tracepoint = 1; 134 break; 135 } 136 } 137 138 if (optind >= argc) 139 error (_("mi_cmd_break_insert: Missing <location>")); 140 if (optind < argc - 1) 141 error (_("mi_cmd_break_insert: Garbage following <location>")); 142 address = argv[optind]; 143 144 /* Now we have what we need, let's insert the breakpoint! */ 145 if (! mi_breakpoint_observers_installed) 146 { 147 observer_attach_breakpoint_created (breakpoint_notify); 148 observer_attach_breakpoint_modified (breakpoint_notify); 149 observer_attach_breakpoint_deleted (breakpoint_notify); 150 mi_breakpoint_observers_installed = 1; 151 } 152 153 back_to = make_cleanup_restore_integer (&mi_can_breakpoint_notify); 154 mi_can_breakpoint_notify = 1; 155 156 /* Note that to request a fast tracepoint, the client uses the 157 "hardware" flag, although there's nothing of hardware related to 158 fast tracepoints -- one can implement slow tracepoints with 159 hardware breakpoints, but fast tracepoints are always software. 160 "fast" is a misnomer, actually, "jump" would be more appropriate. 161 A simulator or an emulator could conceivably implement fast 162 regular non-jump based tracepoints. */ 163 type_wanted = (tracepoint 164 ? (hardware ? bp_fast_tracepoint : bp_tracepoint) 165 : (hardware ? bp_hardware_breakpoint : bp_breakpoint)); 166 167 create_breakpoint (get_current_arch (), address, condition, thread, 168 0 /* condition and thread are valid. */, 169 temp_p, type_wanted, 170 ignore_count, 171 pending ? AUTO_BOOLEAN_TRUE : AUTO_BOOLEAN_FALSE, 172 NULL, 0, enabled); 173 do_cleanups (back_to); 174 175 } 176 177 enum wp_type 178 { 179 REG_WP, 180 READ_WP, 181 ACCESS_WP 182 }; 183 184 void 185 mi_cmd_break_passcount (char *command, char **argv, int argc) 186 { 187 int n; 188 int p; 189 struct breakpoint *t; 190 191 if (argc != 2) 192 error (_("Usage: tracepoint-number passcount")); 193 194 n = atoi (argv[0]); 195 p = atoi (argv[1]); 196 t = get_tracepoint (n); 197 198 if (t) 199 { 200 t->pass_count = p; 201 observer_notify_tracepoint_modified (n); 202 } 203 else 204 { 205 error (_("Cound not find tracepoint %d"), n); 206 } 207 } 208 209 /* Insert a watchpoint. The type of watchpoint is specified by the 210 first argument: 211 -break-watch <expr> --> insert a regular wp. 212 -break-watch -r <expr> --> insert a read watchpoint. 213 -break-watch -a <expr> --> insert an access wp. */ 214 215 void 216 mi_cmd_break_watch (char *command, char **argv, int argc) 217 { 218 char *expr = NULL; 219 enum wp_type type = REG_WP; 220 enum opt 221 { 222 READ_OPT, ACCESS_OPT 223 }; 224 static struct mi_opt opts[] = 225 { 226 {"r", READ_OPT, 0}, 227 {"a", ACCESS_OPT, 0}, 228 { 0, 0, 0 } 229 }; 230 231 /* Parse arguments. */ 232 int optind = 0; 233 char *optarg; 234 235 while (1) 236 { 237 int opt = mi_getopt ("mi_cmd_break_watch", argc, argv, 238 opts, &optind, &optarg); 239 240 if (opt < 0) 241 break; 242 switch ((enum opt) opt) 243 { 244 case READ_OPT: 245 type = READ_WP; 246 break; 247 case ACCESS_OPT: 248 type = ACCESS_WP; 249 break; 250 } 251 } 252 if (optind >= argc) 253 error (_("mi_cmd_break_watch: Missing <expression>")); 254 if (optind < argc - 1) 255 error (_("mi_cmd_break_watch: Garbage following <expression>")); 256 expr = argv[optind]; 257 258 /* Now we have what we need, let's insert the watchpoint! */ 259 switch (type) 260 { 261 case REG_WP: 262 watch_command_wrapper (expr, FROM_TTY); 263 break; 264 case READ_WP: 265 rwatch_command_wrapper (expr, FROM_TTY); 266 break; 267 case ACCESS_WP: 268 awatch_command_wrapper (expr, FROM_TTY); 269 break; 270 default: 271 error (_("mi_cmd_break_watch: Unknown watchpoint type.")); 272 } 273 } 274 275 /* The mi_read_next_line consults these variable to return successive 276 command lines. While it would be clearer to use a closure pointer, 277 it is not expected that any future code will use read_command_lines_1, 278 therefore no point of overengineering. */ 279 280 static char **mi_command_line_array; 281 static int mi_command_line_array_cnt; 282 static int mi_command_line_array_ptr; 283 284 static char * 285 mi_read_next_line (void) 286 { 287 if (mi_command_line_array_ptr == mi_command_line_array_cnt) 288 return NULL; 289 else 290 return mi_command_line_array[mi_command_line_array_ptr++]; 291 } 292 293 void 294 mi_cmd_break_commands (char *command, char **argv, int argc) 295 { 296 struct command_line *break_command; 297 char *endptr; 298 int bnum; 299 struct breakpoint *b; 300 301 if (argc < 1) 302 error ("USAGE: %s <BKPT> [<COMMAND> [<COMMAND>...]]", command); 303 304 bnum = strtol (argv[0], &endptr, 0); 305 if (endptr == argv[0]) 306 error ("breakpoint number argument \"%s\" is not a number.", 307 argv[0]); 308 else if (*endptr != '\0') 309 error ("junk at the end of breakpoint number argument \"%s\".", 310 argv[0]); 311 312 b = get_breakpoint (bnum); 313 if (b == NULL) 314 error ("breakpoint %d not found.", bnum); 315 316 mi_command_line_array = argv; 317 mi_command_line_array_ptr = 1; 318 mi_command_line_array_cnt = argc; 319 320 if (is_tracepoint (b)) 321 break_command = read_command_lines_1 (mi_read_next_line, 1, 322 check_tracepoint_command, b); 323 else 324 break_command = read_command_lines_1 (mi_read_next_line, 1, 0, 0); 325 326 breakpoint_set_commands (b, break_command); 327 } 328 329