| 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 oind = 0; |
| 102 | char *oarg; |
| 103 | |
| 104 | while (1) |
| 105 | { |
| 106 | int opt = mi_getopt ("-break-insert", argc, argv, |
| 107 | opts, &oind, &oarg); |
| 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 = oarg; |
| 120 | break; |
| 121 | case IGNORE_COUNT_OPT: |
| 122 | ignore_count = atol (oarg); |
| 123 | break; |
| 124 | case THREAD_OPT: |
| 125 | thread = atol (oarg); |
| 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 (oind >= argc) |
| 140 | error (_("-break-insert: Missing <location>")); |
| 141 | if (oind < argc - 1) |
| 142 | error (_("-break-insert: Garbage following <location>")); |
| 143 | address = argv[oind]; |
| 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 oind = 0; |
| 232 | char *oarg; |
| 233 | |
| 234 | while (1) |
| 235 | { |
| 236 | int opt = mi_getopt ("-break-watch", argc, argv, |
| 237 | opts, &oind, &oarg); |
| 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 (oind >= argc) |
| 252 | error (_("-break-watch: Missing <expression>")); |
| 253 | if (oind < argc - 1) |
| 254 | error (_("-break-watch: Garbage following <expression>")); |
| 255 | expr = argv[oind]; |
| 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 | |