1 /* MI Command Set - breakpoint and watchpoint commands. 2 Copyright (C) 2000-2002, 2007-2012 Free Software Foundation, Inc. 3 Contributed by Cygnus Solutions (a Red Hat company). 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #include "defs.h" 21 #include "arch-utils.h" 22 #include "mi-cmds.h" 23 #include "ui-out.h" 24 #include "mi-out.h" 25 #include "breakpoint.h" 26 #include "gdb_string.h" 27 #include "mi-getopt.h" 28 #include "gdb.h" 29 #include "exceptions.h" 30 #include "observer.h" 31 #include "mi-main.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 (struct breakpoint *b) 50 { 51 if (mi_can_breakpoint_notify) 52 gdb_breakpoint_query (current_uiout, b->number, 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 const 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 ("-break-insert", argc, argv, 107 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 (_("-break-insert: Missing <location>")); 141 if (optind < argc - 1) 142 error (_("-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 mi_breakpoint_observers_installed = 1; 150 } 151 152 back_to = make_cleanup_restore_integer (&mi_can_breakpoint_notify); 153 mi_can_breakpoint_notify = 1; 154 155 /* Note that to request a fast tracepoint, the client uses the 156 "hardware" flag, although there's nothing of hardware related to 157 fast tracepoints -- one can implement slow tracepoints with 158 hardware breakpoints, but fast tracepoints are always software. 159 "fast" is a misnomer, actually, "jump" would be more appropriate. 160 A simulator or an emulator could conceivably implement fast 161 regular non-jump based tracepoints. */ 162 type_wanted = (tracepoint 163 ? (hardware ? bp_fast_tracepoint : bp_tracepoint) 164 : (hardware ? bp_hardware_breakpoint : bp_breakpoint)); 165 166 create_breakpoint (get_current_arch (), address, condition, thread, 167 0 /* condition and thread are valid. */, 168 temp_p, type_wanted, 169 ignore_count, 170 pending ? AUTO_BOOLEAN_TRUE : AUTO_BOOLEAN_FALSE, 171 &bkpt_breakpoint_ops, 0, enabled, 0, 0); 172 do_cleanups (back_to); 173 174 } 175 176 enum wp_type 177 { 178 REG_WP, 179 READ_WP, 180 ACCESS_WP 181 }; 182 183 void 184 mi_cmd_break_passcount (char *command, char **argv, int argc) 185 { 186 int n; 187 int p; 188 struct tracepoint *t; 189 190 if (argc != 2) 191 error (_("Usage: tracepoint-number passcount")); 192 193 n = atoi (argv[0]); 194 p = atoi (argv[1]); 195 t = get_tracepoint (n); 196 197 if (t) 198 { 199 t->pass_count = p; 200 observer_notify_tracepoint_modified (n); 201 } 202 else 203 { 204 error (_("Could not find tracepoint %d"), n); 205 } 206 } 207 208 /* Insert a watchpoint. The type of watchpoint is specified by the 209 first argument: 210 -break-watch <expr> --> insert a regular wp. 211 -break-watch -r <expr> --> insert a read watchpoint. 212 -break-watch -a <expr> --> insert an access wp. */ 213 214 void 215 mi_cmd_break_watch (char *command, char **argv, int argc) 216 { 217 char *expr = NULL; 218 enum wp_type type = REG_WP; 219 enum opt 220 { 221 READ_OPT, ACCESS_OPT 222 }; 223 static const struct mi_opt opts[] = 224 { 225 {"r", READ_OPT, 0}, 226 {"a", ACCESS_OPT, 0}, 227 { 0, 0, 0 } 228 }; 229 230 /* Parse arguments. */ 231 int optind = 0; 232 char *optarg; 233 234 while (1) 235 { 236 int opt = mi_getopt ("-break-watch", argc, argv, 237 opts, &optind, &optarg); 238 239 if (opt < 0) 240 break; 241 switch ((enum opt) opt) 242 { 243 case READ_OPT: 244 type = READ_WP; 245 break; 246 case ACCESS_OPT: 247 type = ACCESS_WP; 248 break; 249 } 250 } 251 if (optind >= argc) 252 error (_("-break-watch: Missing <expression>")); 253 if (optind < argc - 1) 254 error (_("-break-watch: Garbage following <expression>")); 255 expr = argv[optind]; 256 257 /* Now we have what we need, let's insert the watchpoint! */ 258 switch (type) 259 { 260 case REG_WP: 261 watch_command_wrapper (expr, FROM_TTY, 0); 262 break; 263 case READ_WP: 264 rwatch_command_wrapper (expr, FROM_TTY, 0); 265 break; 266 case ACCESS_WP: 267 awatch_command_wrapper (expr, FROM_TTY, 0); 268 break; 269 default: 270 error (_("-break-watch: Unknown watchpoint type.")); 271 } 272 } 273 274 /* The mi_read_next_line consults these variable to return successive 275 command lines. While it would be clearer to use a closure pointer, 276 it is not expected that any future code will use read_command_lines_1, 277 therefore no point of overengineering. */ 278 279 static char **mi_command_line_array; 280 static int mi_command_line_array_cnt; 281 static int mi_command_line_array_ptr; 282 283 static char * 284 mi_read_next_line (void) 285 { 286 if (mi_command_line_array_ptr == mi_command_line_array_cnt) 287 return NULL; 288 else 289 return mi_command_line_array[mi_command_line_array_ptr++]; 290 } 291 292 void 293 mi_cmd_break_commands (char *command, char **argv, int argc) 294 { 295 struct command_line *break_command; 296 char *endptr; 297 int bnum; 298 struct breakpoint *b; 299 300 if (argc < 1) 301 error (_("USAGE: %s <BKPT> [<COMMAND> [<COMMAND>...]]"), command); 302 303 bnum = strtol (argv[0], &endptr, 0); 304 if (endptr == argv[0]) 305 error (_("breakpoint number argument \"%s\" is not a number."), 306 argv[0]); 307 else if (*endptr != '\0') 308 error (_("junk at the end of breakpoint number argument \"%s\"."), 309 argv[0]); 310 311 b = get_breakpoint (bnum); 312 if (b == NULL) 313 error (_("breakpoint %d not found."), bnum); 314 315 mi_command_line_array = argv; 316 mi_command_line_array_ptr = 1; 317 mi_command_line_array_cnt = argc; 318 319 if (is_tracepoint (b)) 320 break_command = read_command_lines_1 (mi_read_next_line, 1, 321 check_tracepoint_command, b); 322 else 323 break_command = read_command_lines_1 (mi_read_next_line, 1, 0, 0); 324 325 breakpoint_set_commands (b, break_command); 326 } 327 328