| 1 | /*- |
| 2 | * This code is derived from software copyrighted by the Free Software |
| 3 | * Foundation. |
| 4 | * |
| 5 | * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. |
| 6 | * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. |
| 7 | */ |
| 8 | |
| 9 | #ifndef lint |
| 10 | static char sccsid[] = "@(#)breakpoint.c 6.3 (Berkeley) 5/8/91"; |
| 11 | #endif /* not lint */ |
| 12 | |
| 13 | /* Everything about breakpoints, for GDB. |
| 14 | Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. |
| 15 | |
| 16 | This file is part of GDB. |
| 17 | |
| 18 | GDB is free software; you can redistribute it and/or modify |
| 19 | it under the terms of the GNU General Public License as published by |
| 20 | the Free Software Foundation; either version 1, or (at your option) |
| 21 | any later version. |
| 22 | |
| 23 | GDB is distributed in the hope that it will be useful, |
| 24 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 26 | GNU General Public License for more details. |
| 27 | |
| 28 | You should have received a copy of the GNU General Public License |
| 29 | along with GDB; see the file COPYING. If not, write to |
| 30 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | #include "defs.h" |
| 34 | #include "param.h" |
| 35 | #include "symtab.h" |
| 36 | #include "frame.h" |
| 37 | |
| 38 | /* This is the sequence of bytes we insert for a breakpoint. */ |
| 39 | |
| 40 | static char break_insn[] = BREAKPOINT; |
| 41 | |
| 42 | /* States of enablement of breakpoint. |
| 43 | `temporary' means disable when hit. |
| 44 | `delete' means delete when hit. */ |
| 45 | |
| 46 | enum enable { disabled, enabled, temporary, delete}; |
| 47 | |
| 48 | /* Not that the ->silent field is not currently used by any commands |
| 49 | (though the code is in there if it was to be and set_raw_breakpoint |
| 50 | does set it to 0). I implemented it because I thought it would be |
| 51 | useful for a hack I had to put in; I'm going to leave it in because |
| 52 | I can see how there might be times when it would indeed be useful */ |
| 53 | |
| 54 | struct breakpoint |
| 55 | { |
| 56 | struct breakpoint *next; |
| 57 | /* Number assigned to distinguish breakpoints. */ |
| 58 | int number; |
| 59 | /* Address to break at. */ |
| 60 | CORE_ADDR address; |
| 61 | /* Line number of this address. Redundant. */ |
| 62 | int line_number; |
| 63 | /* Symtab of file of this address. Redundant. */ |
| 64 | struct symtab *symtab; |
| 65 | /* Zero means disabled; remember the info but don't break here. */ |
| 66 | enum enable enable; |
| 67 | /* Non-zero means a silent breakpoint (don't print frame info |
| 68 | if we stop here). */ |
| 69 | unsigned char silent; |
| 70 | /* Number of stops at this breakpoint that should |
| 71 | be continued automatically before really stopping. */ |
| 72 | int ignore_count; |
| 73 | /* "Real" contents of byte where breakpoint has been inserted. |
| 74 | Valid only when breakpoints are in the program. */ |
| 75 | char shadow_contents[sizeof break_insn]; |
| 76 | /* Nonzero if this breakpoint is now inserted. */ |
| 77 | char inserted; |
| 78 | /* Nonzero if this is not the first breakpoint in the list |
| 79 | for the given address. */ |
| 80 | char duplicate; |
| 81 | /* Chain of command lines to execute when this breakpoint is hit. */ |
| 82 | struct command_line *commands; |
| 83 | /* Stack depth (address of frame). If nonzero, break only if fp |
| 84 | equals this. */ |
| 85 | FRAME_ADDR frame; |
| 86 | /* Conditional. Break only if this expression's value is nonzero. */ |
| 87 | struct expression *cond; |
| 88 | }; |
| 89 | |
| 90 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) |
| 91 | |
| 92 | /* Chain of all breakpoints defined. */ |
| 93 | |
| 94 | struct breakpoint *breakpoint_chain; |
| 95 | |
| 96 | /* Number of last breakpoint made. */ |
| 97 | |
| 98 | static int breakpoint_count; |
| 99 | |
| 100 | /* Default address, symtab and line to put a breakpoint at |
| 101 | for "break" command with no arg. |
| 102 | if default_breakpoint_valid is zero, the other three are |
| 103 | not valid, and "break" with no arg is an error. |
| 104 | |
| 105 | This set by print_stack_frame, which calls set_default_breakpoint. */ |
| 106 | |
| 107 | int default_breakpoint_valid; |
| 108 | CORE_ADDR default_breakpoint_address; |
| 109 | struct symtab *default_breakpoint_symtab; |
| 110 | int default_breakpoint_line; |
| 111 | |
| 112 | /* Remaining commands (not yet executed) |
| 113 | of last breakpoint hit. */ |
| 114 | |
| 115 | struct command_line *breakpoint_commands; |
| 116 | |
| 117 | static void delete_breakpoint (); |
| 118 | void clear_momentary_breakpoints (); |
| 119 | void breakpoint_auto_delete (); |
| 120 | |
| 121 | /* Flag indicating extra verbosity for xgdb. */ |
| 122 | extern int xgdb_verbose; |
| 123 | \f |
| 124 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ |
| 125 | |
| 126 | static void |
| 127 | condition_command (arg, from_tty) |
| 128 | char *arg; |
| 129 | int from_tty; |
| 130 | { |
| 131 | register struct breakpoint *b; |
| 132 | register char *p; |
| 133 | register int bnum; |
| 134 | register struct expression *expr; |
| 135 | |
| 136 | if (arg == 0) |
| 137 | error_no_arg ("breakpoint number"); |
| 138 | |
| 139 | p = arg; |
| 140 | while (*p >= '0' && *p <= '9') p++; |
| 141 | if (p == arg) |
| 142 | /* There is no number here. (e.g. "cond a == b"). */ |
| 143 | error_no_arg ("breakpoint number"); |
| 144 | bnum = atoi (arg); |
| 145 | |
| 146 | ALL_BREAKPOINTS (b) |
| 147 | if (b->number == bnum) |
| 148 | { |
| 149 | if (b->cond) |
| 150 | { |
| 151 | free (b->cond); |
| 152 | b->cond = 0; /* parse_c_1 can leave this unchanged. */ |
| 153 | } |
| 154 | if (*p == 0) |
| 155 | { |
| 156 | b->cond = 0; |
| 157 | if (from_tty) |
| 158 | printf ("Breakpoint %d now unconditional.\n", bnum); |
| 159 | } |
| 160 | else |
| 161 | { |
| 162 | if (*p != ' ' && *p != '\t') |
| 163 | error ("Arguments must be an integer (breakpoint number) and an expression."); |
| 164 | |
| 165 | /* Find start of expression */ |
| 166 | while (*p == ' ' || *p == '\t') p++; |
| 167 | |
| 168 | arg = p; |
| 169 | b->cond = (struct expression *) parse_c_1 (&arg, block_for_pc (b->address), 0); |
| 170 | if (*arg) |
| 171 | error ("Junk at end of expression"); |
| 172 | } |
| 173 | return; |
| 174 | } |
| 175 | |
| 176 | error ("No breakpoint number %d.", bnum); |
| 177 | } |
| 178 | |
| 179 | static void |
| 180 | commands_command (arg, from_tty) |
| 181 | char *arg; |
| 182 | int from_tty; |
| 183 | { |
| 184 | register struct breakpoint *b; |
| 185 | register char *p, *p1; |
| 186 | register int bnum; |
| 187 | struct command_line *l; |
| 188 | |
| 189 | /* If we allowed this, we would have problems with when to |
| 190 | free the storage, if we change the commands currently |
| 191 | being read from. */ |
| 192 | |
| 193 | if (breakpoint_commands) |
| 194 | error ("Can't use the \"commands\" command among a breakpoint's commands."); |
| 195 | |
| 196 | /* Allow commands by itself to refer to the last breakpoint. */ |
| 197 | if (arg == 0) |
| 198 | bnum = breakpoint_count; |
| 199 | else |
| 200 | { |
| 201 | p = arg; |
| 202 | if (! (*p >= '0' && *p <= '9')) |
| 203 | error ("Argument must be integer (a breakpoint number)."); |
| 204 | |
| 205 | while (*p >= '0' && *p <= '9') p++; |
| 206 | if (*p) |
| 207 | error ("Unexpected extra arguments following breakpoint number."); |
| 208 | |
| 209 | bnum = atoi (arg); |
| 210 | } |
| 211 | |
| 212 | ALL_BREAKPOINTS (b) |
| 213 | if (b->number == bnum) |
| 214 | { |
| 215 | if (from_tty && input_from_terminal_p ()) |
| 216 | { |
| 217 | printf ("Type commands for when breakpoint %d is hit, one per line.\n\ |
| 218 | End with a line saying just \"end\".\n", bnum); |
| 219 | fflush (stdout); |
| 220 | } |
| 221 | l = read_command_lines (from_tty); |
| 222 | free_command_lines (b->commands); |
| 223 | b->commands = l; |
| 224 | return; |
| 225 | } |
| 226 | error ("No breakpoint number %d.", bnum); |
| 227 | } |
| 228 | |
| 229 | /* Called from command loop to execute the commands |
| 230 | associated with the breakpoint we just stopped at. */ |
| 231 | |
| 232 | void |
| 233 | do_breakpoint_commands () |
| 234 | { |
| 235 | struct command_line *cmd; |
| 236 | |
| 237 | while (cmd = breakpoint_commands) |
| 238 | { |
| 239 | breakpoint_commands = 0; |
| 240 | execute_command_lines(cmd); |
| 241 | /* If command was "cont", breakpoint_commands is now 0, |
| 242 | of if we stopped at yet another breakpoint which has commands, |
| 243 | it is now the commands for the new breakpoint. */ |
| 244 | } |
| 245 | clear_momentary_breakpoints (); |
| 246 | } |
| 247 | |
| 248 | /* Used when the program is proceeded, to eliminate any remaining |
| 249 | commands attached to the previous breakpoint we stopped at. */ |
| 250 | |
| 251 | void |
| 252 | clear_breakpoint_commands () |
| 253 | { |
| 254 | breakpoint_commands = 0; |
| 255 | breakpoint_auto_delete (0); |
| 256 | } |
| 257 | |
| 258 | /* Functions to get and set the current list of pending |
| 259 | breakpoint commands. These are used by run_stack_dummy |
| 260 | to preserve the commands around a function call. */ |
| 261 | |
| 262 | struct command_line * |
| 263 | get_breakpoint_commands () |
| 264 | { |
| 265 | return breakpoint_commands; |
| 266 | } |
| 267 | |
| 268 | void |
| 269 | set_breakpoint_commands (cmds) |
| 270 | struct command_line *cmds; |
| 271 | { |
| 272 | breakpoint_commands = cmds; |
| 273 | } |
| 274 | \f |
| 275 | /* insert_breakpoints is used when starting or continuing the program. |
| 276 | remove_breakpoints is used when the program stops. |
| 277 | Both return zero if successful, |
| 278 | or an `errno' value if could not write the inferior. */ |
| 279 | |
| 280 | int |
| 281 | insert_breakpoints () |
| 282 | { |
| 283 | register struct breakpoint *b; |
| 284 | int val; |
| 285 | |
| 286 | #ifdef BREAKPOINT_DEBUG |
| 287 | printf ("Inserting breakpoints.\n"); |
| 288 | #endif /* BREAKPOINT_DEBUG */ |
| 289 | |
| 290 | ALL_BREAKPOINTS (b) |
| 291 | if (b->enable != disabled && ! b->inserted && ! b->duplicate) |
| 292 | { |
| 293 | read_memory (b->address, b->shadow_contents, sizeof break_insn); |
| 294 | val = write_memory (b->address, break_insn, sizeof break_insn); |
| 295 | if (val) |
| 296 | return val; |
| 297 | #ifdef BREAKPOINT_DEBUG |
| 298 | printf ("Inserted breakpoint at 0x%x, shadow 0x%x, 0x%x.\n", |
| 299 | b->address, b->shadow_contents[0], b->shadow_contents[1]); |
| 300 | #endif /* BREAKPOINT_DEBUG */ |
| 301 | b->inserted = 1; |
| 302 | } |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | int |
| 307 | remove_breakpoints () |
| 308 | { |
| 309 | register struct breakpoint *b; |
| 310 | int val; |
| 311 | |
| 312 | #ifdef BREAKPOINT_DEBUG |
| 313 | printf ("Removing breakpoints.\n"); |
| 314 | #endif /* BREAKPOINT_DEBUG */ |
| 315 | |
| 316 | ALL_BREAKPOINTS (b) |
| 317 | if (b->inserted) |
| 318 | { |
| 319 | val = write_memory (b->address, b->shadow_contents, sizeof break_insn); |
| 320 | if (val) |
| 321 | return val; |
| 322 | b->inserted = 0; |
| 323 | #ifdef BREAKPOINT_DEBUG |
| 324 | printf ("Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n", |
| 325 | b->address, b->shadow_contents[0], b->shadow_contents[1]); |
| 326 | #endif /* BREAKPOINT_DEBUG */ |
| 327 | } |
| 328 | |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | /* Clear the "inserted" flag in all breakpoints. |
| 333 | This is done when the inferior is loaded. */ |
| 334 | |
| 335 | void |
| 336 | mark_breakpoints_out () |
| 337 | { |
| 338 | register struct breakpoint *b; |
| 339 | |
| 340 | ALL_BREAKPOINTS (b) |
| 341 | b->inserted = 0; |
| 342 | } |
| 343 | |
| 344 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. |
| 345 | When continuing from a location with a breakpoint, |
| 346 | we actually single step once before calling insert_breakpoints. */ |
| 347 | |
| 348 | int |
| 349 | breakpoint_here_p (pc) |
| 350 | CORE_ADDR pc; |
| 351 | { |
| 352 | register struct breakpoint *b; |
| 353 | |
| 354 | ALL_BREAKPOINTS (b) |
| 355 | if (b->enable != disabled && b->address == pc) |
| 356 | return 1; |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | /* Evaluate the expression EXP and return 1 if value is zero. |
| 362 | This is used inside a catch_errors to evaluate the breakpoint condition. */ |
| 363 | |
| 364 | int |
| 365 | breakpoint_cond_eval (exp) |
| 366 | struct expression *exp; |
| 367 | { |
| 368 | return value_zerop (evaluate_expression (exp)); |
| 369 | } |
| 370 | |
| 371 | /* Return 0 if PC is not the address just after a breakpoint, |
| 372 | or -1 if breakpoint says do not stop now, |
| 373 | or -2 if breakpoint says it has deleted itself and don't stop, |
| 374 | or -3 if hit a breakpoint number -3 (delete when program stops), |
| 375 | or else the number of the breakpoint, |
| 376 | with 0x1000000 added (or subtracted, for a negative return value) for |
| 377 | a silent breakpoint. */ |
| 378 | |
| 379 | int |
| 380 | breakpoint_stop_status (pc, frame_address) |
| 381 | CORE_ADDR pc; |
| 382 | FRAME_ADDR frame_address; |
| 383 | { |
| 384 | register struct breakpoint *b; |
| 385 | register int cont = 0; |
| 386 | |
| 387 | /* Get the address where the breakpoint would have been. */ |
| 388 | pc -= DECR_PC_AFTER_BREAK; |
| 389 | |
| 390 | ALL_BREAKPOINTS (b) |
| 391 | if (b->enable != disabled && b->address == pc) |
| 392 | { |
| 393 | if (b->frame && b->frame != frame_address) |
| 394 | cont = -1; |
| 395 | else |
| 396 | { |
| 397 | int value_zero; |
| 398 | if (b->cond) |
| 399 | { |
| 400 | /* Need to select the frame, with all that implies |
| 401 | so that the conditions will have the right context. */ |
| 402 | select_frame (get_current_frame (), 0); |
| 403 | value_zero |
| 404 | = catch_errors (breakpoint_cond_eval, b->cond, |
| 405 | "Error occurred in testing breakpoint condition."); |
| 406 | free_all_values (); |
| 407 | } |
| 408 | if (b->cond && value_zero) |
| 409 | { |
| 410 | cont = -1; |
| 411 | } |
| 412 | else if (b->ignore_count > 0) |
| 413 | { |
| 414 | b->ignore_count--; |
| 415 | cont = -1; |
| 416 | } |
| 417 | else |
| 418 | { |
| 419 | if (b->enable == temporary) |
| 420 | b->enable = disabled; |
| 421 | breakpoint_commands = b->commands; |
| 422 | if (b->silent |
| 423 | || (breakpoint_commands |
| 424 | && !strcmp ("silent", breakpoint_commands->line))) |
| 425 | { |
| 426 | if (breakpoint_commands) |
| 427 | breakpoint_commands = breakpoint_commands->next; |
| 428 | return (b->number > 0 ? |
| 429 | 0x1000000 + b->number : |
| 430 | b->number - 0x1000000); |
| 431 | } |
| 432 | return b->number; |
| 433 | } |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | return cont; |
| 438 | } |
| 439 | \f |
| 440 | static void |
| 441 | breakpoint_1 (bnum) |
| 442 | int bnum; |
| 443 | { |
| 444 | register struct breakpoint *b; |
| 445 | register struct command_line *l; |
| 446 | register struct symbol *sym; |
| 447 | CORE_ADDR last_addr = (CORE_ADDR)-1; |
| 448 | |
| 449 | ALL_BREAKPOINTS (b) |
| 450 | if (bnum == -1 || bnum == b->number) |
| 451 | { |
| 452 | printf_filtered ("#%-3d %c 0x%08x", b->number, |
| 453 | "nyod"[(int) b->enable], |
| 454 | b->address); |
| 455 | last_addr = b->address; |
| 456 | if (b->symtab) |
| 457 | { |
| 458 | sym = find_pc_function (b->address); |
| 459 | if (sym) |
| 460 | { |
| 461 | fputs_filtered (" in ", stdout); |
| 462 | fputs_demangled (SYMBOL_NAME (sym), stdout, 1); |
| 463 | fputs_filtered (" (", stdout); |
| 464 | } |
| 465 | fputs_filtered (b->symtab->filename, stdout); |
| 466 | printf_filtered (" line %d", b->line_number); |
| 467 | if (sym) fputs_filtered(")", stdout); |
| 468 | } |
| 469 | else |
| 470 | print_address_symbolic (b->address, stdout); |
| 471 | |
| 472 | printf_filtered ("\n"); |
| 473 | |
| 474 | if (b->ignore_count) |
| 475 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); |
| 476 | if (b->frame) |
| 477 | printf_filtered ("\tstop only in stack frame at 0x%x\n", b->frame); |
| 478 | if (b->cond) |
| 479 | { |
| 480 | printf_filtered ("\tbreak only if "); |
| 481 | print_expression (b->cond, stdout); |
| 482 | printf_filtered ("\n"); |
| 483 | } |
| 484 | if (l = b->commands) |
| 485 | while (l) |
| 486 | { |
| 487 | printf_filtered ("\t%s\n", l->line); |
| 488 | l = l->next; |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | /* Compare against (CORE_ADDR)-1 in case some compiler decides |
| 493 | that a comparison of an unsigned with -1 is always false. */ |
| 494 | if (last_addr != (CORE_ADDR)-1) |
| 495 | set_next_address (last_addr); |
| 496 | } |
| 497 | |
| 498 | static void |
| 499 | breakpoints_info (bnum_exp) |
| 500 | char *bnum_exp; |
| 501 | { |
| 502 | int bnum = -1; |
| 503 | |
| 504 | if (bnum_exp) |
| 505 | bnum = parse_and_eval_address (bnum_exp); |
| 506 | else if (breakpoint_chain == 0) |
| 507 | printf_filtered ("No breakpoints.\n"); |
| 508 | else |
| 509 | printf_filtered ("Breakpoints:\n\ |
| 510 | Num Enb Address Where\n"); |
| 511 | |
| 512 | breakpoint_1 (bnum); |
| 513 | } |
| 514 | |
| 515 | /* Print a message describing any breakpoints set at PC. */ |
| 516 | |
| 517 | static void |
| 518 | describe_other_breakpoints (pc) |
| 519 | register CORE_ADDR pc; |
| 520 | { |
| 521 | register int others = 0; |
| 522 | register struct breakpoint *b; |
| 523 | |
| 524 | ALL_BREAKPOINTS (b) |
| 525 | if (b->address == pc) |
| 526 | others++; |
| 527 | if (others > 0) |
| 528 | { |
| 529 | printf ("Note: breakpoint%s ", (others > 1) ? "s" : ""); |
| 530 | ALL_BREAKPOINTS (b) |
| 531 | if (b->address == pc) |
| 532 | { |
| 533 | others--; |
| 534 | printf ("%d%s%s ", |
| 535 | b->number, |
| 536 | (b->enable == disabled) ? " (disabled)" : "", |
| 537 | (others > 1) ? "," : ((others == 1) ? " and" : "")); |
| 538 | } |
| 539 | printf ("also set at pc 0x%x.\n", pc); |
| 540 | } |
| 541 | } |
| 542 | \f |
| 543 | /* Set the default place to put a breakpoint |
| 544 | for the `break' command with no arguments. */ |
| 545 | |
| 546 | void |
| 547 | set_default_breakpoint (valid, addr, symtab, line) |
| 548 | int valid; |
| 549 | CORE_ADDR addr; |
| 550 | struct symtab *symtab; |
| 551 | int line; |
| 552 | { |
| 553 | default_breakpoint_valid = valid; |
| 554 | default_breakpoint_address = addr; |
| 555 | default_breakpoint_symtab = symtab; |
| 556 | default_breakpoint_line = line; |
| 557 | } |
| 558 | |
| 559 | /* Rescan breakpoints at address ADDRESS, |
| 560 | marking the first one as "first" and any others as "duplicates". |
| 561 | This is so that the bpt instruction is only inserted once. */ |
| 562 | |
| 563 | static void |
| 564 | check_duplicates (address) |
| 565 | CORE_ADDR address; |
| 566 | { |
| 567 | register struct breakpoint *b; |
| 568 | register int count = 0; |
| 569 | |
| 570 | ALL_BREAKPOINTS (b) |
| 571 | if (b->enable != disabled && b->address == address) |
| 572 | { |
| 573 | count++; |
| 574 | b->duplicate = count > 1; |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | /* Low level routine to set a breakpoint. |
| 579 | Takes as args the three things that every breakpoint must have. |
| 580 | Returns the breakpoint object so caller can set other things. |
| 581 | Does not set the breakpoint number! |
| 582 | Does not print anything. */ |
| 583 | |
| 584 | static struct breakpoint * |
| 585 | set_raw_breakpoint (sal) |
| 586 | struct symtab_and_line sal; |
| 587 | { |
| 588 | register struct breakpoint *b, *b1; |
| 589 | |
| 590 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); |
| 591 | bzero (b, sizeof *b); |
| 592 | b->address = sal.pc; |
| 593 | b->symtab = sal.symtab; |
| 594 | b->line_number = sal.line; |
| 595 | b->enable = enabled; |
| 596 | b->next = 0; |
| 597 | b->silent = 0; |
| 598 | |
| 599 | /* Add this breakpoint to the end of the chain |
| 600 | so that a list of breakpoints will come out in order |
| 601 | of increasing numbers. */ |
| 602 | |
| 603 | b1 = breakpoint_chain; |
| 604 | if (b1 == 0) |
| 605 | breakpoint_chain = b; |
| 606 | else |
| 607 | { |
| 608 | while (b1->next) |
| 609 | b1 = b1->next; |
| 610 | b1->next = b; |
| 611 | } |
| 612 | |
| 613 | check_duplicates (sal.pc); |
| 614 | |
| 615 | return b; |
| 616 | } |
| 617 | |
| 618 | /* Set a breakpoint that will evaporate an end of command |
| 619 | at address specified by SAL. |
| 620 | Restrict it to frame FRAME if FRAME is nonzero. */ |
| 621 | |
| 622 | void |
| 623 | set_momentary_breakpoint (sal, frame) |
| 624 | struct symtab_and_line sal; |
| 625 | FRAME frame; |
| 626 | { |
| 627 | register struct breakpoint *b; |
| 628 | b = set_raw_breakpoint (sal); |
| 629 | b->number = -3; |
| 630 | b->enable = delete; |
| 631 | b->frame = (frame ? FRAME_FP (frame) : 0); |
| 632 | } |
| 633 | |
| 634 | void |
| 635 | clear_momentary_breakpoints () |
| 636 | { |
| 637 | register struct breakpoint *b; |
| 638 | ALL_BREAKPOINTS (b) |
| 639 | if (b->number == -3) |
| 640 | { |
| 641 | delete_breakpoint (b); |
| 642 | break; |
| 643 | } |
| 644 | } |
| 645 | \f |
| 646 | /* Set a breakpoint from a symtab and line. |
| 647 | If TEMPFLAG is nonzero, it is a temporary breakpoint. |
| 648 | Print the same confirmation messages that the breakpoint command prints. */ |
| 649 | |
| 650 | void |
| 651 | set_breakpoint (s, line, tempflag) |
| 652 | struct symtab *s; |
| 653 | int line; |
| 654 | int tempflag; |
| 655 | { |
| 656 | register struct breakpoint *b; |
| 657 | struct symtab_and_line sal; |
| 658 | |
| 659 | sal.symtab = s; |
| 660 | sal.line = line; |
| 661 | sal.pc = find_line_pc (sal.symtab, sal.line); |
| 662 | if (sal.pc == 0) |
| 663 | error ("No line %d in file \"%s\".\n", sal.line, sal.symtab->filename); |
| 664 | else |
| 665 | { |
| 666 | describe_other_breakpoints (sal.pc); |
| 667 | |
| 668 | b = set_raw_breakpoint (sal); |
| 669 | b->number = ++breakpoint_count; |
| 670 | b->cond = 0; |
| 671 | if (tempflag) |
| 672 | b->enable = temporary; |
| 673 | |
| 674 | printf ("Breakpoint %d at 0x%x", b->number, b->address); |
| 675 | if (b->symtab) |
| 676 | printf (": file %s, line %d.", b->symtab->filename, b->line_number); |
| 677 | printf ("\n"); |
| 678 | } |
| 679 | } |
| 680 | \f |
| 681 | /* Set a breakpoint according to ARG (function, linenum or *address) |
| 682 | and make it temporary if TEMPFLAG is nonzero. */ |
| 683 | |
| 684 | static void |
| 685 | break_command_1 (arg, tempflag, from_tty) |
| 686 | char *arg; |
| 687 | int tempflag, from_tty; |
| 688 | { |
| 689 | struct symtabs_and_lines sals; |
| 690 | struct symtab_and_line sal; |
| 691 | register struct expression *cond = 0; |
| 692 | register struct breakpoint *b; |
| 693 | char *save_arg; |
| 694 | int i; |
| 695 | CORE_ADDR pc; |
| 696 | |
| 697 | sals.sals = NULL; |
| 698 | sals.nelts = 0; |
| 699 | |
| 700 | sal.line = sal.pc = sal.end = 0; |
| 701 | sal.symtab = 0; |
| 702 | |
| 703 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ |
| 704 | |
| 705 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' |
| 706 | && (arg[2] == ' ' || arg[2] == '\t'))) |
| 707 | { |
| 708 | if (default_breakpoint_valid) |
| 709 | { |
| 710 | sals.sals = (struct symtab_and_line *) |
| 711 | malloc (sizeof (struct symtab_and_line)); |
| 712 | sal.pc = default_breakpoint_address; |
| 713 | sal.line = default_breakpoint_line; |
| 714 | sal.symtab = default_breakpoint_symtab; |
| 715 | sals.sals[0] = sal; |
| 716 | sals.nelts = 1; |
| 717 | } |
| 718 | else |
| 719 | error ("No default breakpoint address now."); |
| 720 | } |
| 721 | else |
| 722 | /* Force almost all breakpoints to be in terms of the |
| 723 | current_source_symtab (which is decode_line_1's default). This |
| 724 | should produce the results we want almost all of the time while |
| 725 | leaving default_breakpoint_* alone. */ |
| 726 | if (default_breakpoint_valid |
| 727 | && (!current_source_symtab |
| 728 | || (arg && (*arg == '+' || *arg == '-')))) |
| 729 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| 730 | default_breakpoint_line); |
| 731 | else |
| 732 | sals = decode_line_1 (&arg, 1, 0, 0); |
| 733 | |
| 734 | if (! sals.nelts) |
| 735 | return; |
| 736 | |
| 737 | save_arg = arg; |
| 738 | for (i = 0; i < sals.nelts; i++) |
| 739 | { |
| 740 | sal = sals.sals[i]; |
| 741 | if (sal.pc == 0 && sal.symtab != 0) |
| 742 | { |
| 743 | pc = find_line_pc (sal.symtab, sal.line); |
| 744 | if (pc == 0) |
| 745 | error ("No line %d in file \"%s\".", |
| 746 | sal.line, sal.symtab->filename); |
| 747 | } |
| 748 | else |
| 749 | pc = sal.pc; |
| 750 | |
| 751 | while (arg && *arg) |
| 752 | { |
| 753 | if (arg[0] == 'i' && arg[1] == 'f' |
| 754 | && (arg[2] == ' ' || arg[2] == '\t')) |
| 755 | cond = (struct expression *) parse_c_1 ((arg += 2, &arg), |
| 756 | block_for_pc (pc), 0); |
| 757 | else |
| 758 | error ("Junk at end of arguments."); |
| 759 | } |
| 760 | arg = save_arg; |
| 761 | sals.sals[i].pc = pc; |
| 762 | } |
| 763 | |
| 764 | for (i = 0; i < sals.nelts; i++) |
| 765 | { |
| 766 | sal = sals.sals[i]; |
| 767 | |
| 768 | if (from_tty) |
| 769 | describe_other_breakpoints (sal.pc); |
| 770 | |
| 771 | b = set_raw_breakpoint (sal); |
| 772 | b->number = ++breakpoint_count; |
| 773 | b->cond = cond; |
| 774 | if (tempflag) |
| 775 | b->enable = temporary; |
| 776 | |
| 777 | printf ("Breakpoint %d at 0x%x", b->number, b->address); |
| 778 | if (b->symtab) |
| 779 | printf (": file %s, line %d.", b->symtab->filename, b->line_number); |
| 780 | printf ("\n"); |
| 781 | } |
| 782 | |
| 783 | if (sals.nelts > 1) |
| 784 | { |
| 785 | printf ("Multiple breakpoints were set.\n"); |
| 786 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); |
| 787 | } |
| 788 | free (sals.sals); |
| 789 | } |
| 790 | |
| 791 | static void |
| 792 | break_command (arg, from_tty) |
| 793 | char *arg; |
| 794 | int from_tty; |
| 795 | { |
| 796 | break_command_1 (arg, 0, from_tty); |
| 797 | } |
| 798 | |
| 799 | static void |
| 800 | tbreak_command (arg, from_tty) |
| 801 | char *arg; |
| 802 | int from_tty; |
| 803 | { |
| 804 | break_command_1 (arg, 1, from_tty); |
| 805 | } |
| 806 | \f |
| 807 | /* |
| 808 | * Helper routine for the until_command routine in infcmd.c. Here |
| 809 | * because it uses the mechanisms of breakpoints. |
| 810 | */ |
| 811 | void |
| 812 | until_break_command (arg, from_tty) |
| 813 | char *arg; |
| 814 | int from_tty; |
| 815 | { |
| 816 | struct symtabs_and_lines sals; |
| 817 | struct symtab_and_line sal; |
| 818 | FRAME prev_frame = get_prev_frame (selected_frame); |
| 819 | |
| 820 | clear_proceed_status (); |
| 821 | |
| 822 | /* Set a breakpoint where the user wants it and at return from |
| 823 | this function */ |
| 824 | |
| 825 | if (default_breakpoint_valid) |
| 826 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| 827 | default_breakpoint_line); |
| 828 | else |
| 829 | sals = decode_line_1 (&arg, 1, 0, 0); |
| 830 | |
| 831 | if (sals.nelts != 1) |
| 832 | error ("Couldn't get information on specified line."); |
| 833 | |
| 834 | sal = sals.sals[0]; |
| 835 | free (sals.sals); /* malloc'd, so freed */ |
| 836 | |
| 837 | if (*arg) |
| 838 | error ("Junk at end of arguments."); |
| 839 | |
| 840 | if (sal.pc == 0 && sal.symtab != 0) |
| 841 | sal.pc = find_line_pc (sal.symtab, sal.line); |
| 842 | |
| 843 | if (sal.pc == 0) |
| 844 | error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename); |
| 845 | |
| 846 | set_momentary_breakpoint (sal, selected_frame); |
| 847 | |
| 848 | /* Keep within the current frame */ |
| 849 | |
| 850 | if (prev_frame) |
| 851 | { |
| 852 | struct frame_info *fi; |
| 853 | |
| 854 | fi = get_frame_info (prev_frame); |
| 855 | sal = find_pc_line (fi->pc, 0); |
| 856 | sal.pc = fi->pc; |
| 857 | set_momentary_breakpoint (sal, prev_frame); |
| 858 | } |
| 859 | |
| 860 | proceed (-1, -1, 0); |
| 861 | } |
| 862 | \f |
| 863 | static void |
| 864 | clear_command (arg, from_tty) |
| 865 | char *arg; |
| 866 | int from_tty; |
| 867 | { |
| 868 | register struct breakpoint *b, *b1; |
| 869 | struct symtabs_and_lines sals; |
| 870 | struct symtab_and_line sal; |
| 871 | register struct breakpoint *found; |
| 872 | int i; |
| 873 | |
| 874 | if (arg) |
| 875 | { |
| 876 | sals = decode_line_spec (arg, 1); |
| 877 | } |
| 878 | else |
| 879 | { |
| 880 | sals.sals = (struct symtab_and_line *) malloc (sizeof (struct symtab_and_line)); |
| 881 | sal.line = default_breakpoint_line; |
| 882 | sal.symtab = default_breakpoint_symtab; |
| 883 | sal.pc = 0; |
| 884 | if (sal.symtab == 0) |
| 885 | error ("No source file specified."); |
| 886 | |
| 887 | sals.sals[0] = sal; |
| 888 | sals.nelts = 1; |
| 889 | } |
| 890 | |
| 891 | for (i = 0; i < sals.nelts; i++) |
| 892 | { |
| 893 | /* If exact pc given, clear bpts at that pc. |
| 894 | But if sal.pc is zero, clear all bpts on specified line. */ |
| 895 | sal = sals.sals[i]; |
| 896 | found = (struct breakpoint *) 0; |
| 897 | while (breakpoint_chain |
| 898 | && (sal.pc ? breakpoint_chain->address == sal.pc |
| 899 | : (breakpoint_chain->symtab == sal.symtab |
| 900 | && breakpoint_chain->line_number == sal.line))) |
| 901 | { |
| 902 | b1 = breakpoint_chain; |
| 903 | breakpoint_chain = b1->next; |
| 904 | b1->next = found; |
| 905 | found = b1; |
| 906 | } |
| 907 | |
| 908 | ALL_BREAKPOINTS (b) |
| 909 | while (b->next |
| 910 | && (sal.pc ? b->next->address == sal.pc |
| 911 | : (b->next->symtab == sal.symtab |
| 912 | && b->next->line_number == sal.line))) |
| 913 | { |
| 914 | b1 = b->next; |
| 915 | b->next = b1->next; |
| 916 | b1->next = found; |
| 917 | found = b1; |
| 918 | } |
| 919 | |
| 920 | if (found == 0) |
| 921 | error ("No breakpoint at %s.", arg); |
| 922 | |
| 923 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ |
| 924 | if (from_tty) printf ("Deleted breakpoint%s ", found->next ? "s" : ""); |
| 925 | while (found) |
| 926 | { |
| 927 | if (from_tty) printf ("%d ", found->number); |
| 928 | b1 = found->next; |
| 929 | delete_breakpoint (found); |
| 930 | found = b1; |
| 931 | } |
| 932 | if (from_tty) putchar ('\n'); |
| 933 | } |
| 934 | free (sals.sals); |
| 935 | } |
| 936 | \f |
| 937 | /* Delete breakpoint number BNUM if it is a `delete' breakpoint. |
| 938 | This is called after breakpoint BNUM has been hit. |
| 939 | Also delete any breakpoint numbered -3 unless there are breakpoint |
| 940 | commands to be executed. */ |
| 941 | |
| 942 | void |
| 943 | breakpoint_auto_delete (bnum) |
| 944 | int bnum; |
| 945 | { |
| 946 | register struct breakpoint *b; |
| 947 | if (bnum != 0) |
| 948 | ALL_BREAKPOINTS (b) |
| 949 | if (b->number == bnum) |
| 950 | { |
| 951 | if (b->enable == delete) |
| 952 | delete_breakpoint (b); |
| 953 | break; |
| 954 | } |
| 955 | if (breakpoint_commands == 0) |
| 956 | clear_momentary_breakpoints (); |
| 957 | } |
| 958 | |
| 959 | static void |
| 960 | delete_breakpoint (bpt) |
| 961 | struct breakpoint *bpt; |
| 962 | { |
| 963 | register struct breakpoint *b; |
| 964 | |
| 965 | if (bpt->inserted) |
| 966 | write_memory (bpt->address, bpt->shadow_contents, sizeof break_insn); |
| 967 | |
| 968 | if (breakpoint_chain == bpt) |
| 969 | breakpoint_chain = bpt->next; |
| 970 | |
| 971 | ALL_BREAKPOINTS (b) |
| 972 | if (b->next == bpt) |
| 973 | { |
| 974 | b->next = bpt->next; |
| 975 | break; |
| 976 | } |
| 977 | |
| 978 | check_duplicates (bpt->address); |
| 979 | |
| 980 | free_command_lines (bpt->commands); |
| 981 | if (bpt->cond) |
| 982 | free (bpt->cond); |
| 983 | |
| 984 | if (xgdb_verbose && bpt->number >=0) |
| 985 | printf ("breakpoint #%d deleted\n", bpt->number); |
| 986 | |
| 987 | free (bpt); |
| 988 | } |
| 989 | |
| 990 | static void map_breakpoint_numbers (); |
| 991 | |
| 992 | static void |
| 993 | delete_command (arg, from_tty) |
| 994 | char *arg; |
| 995 | int from_tty; |
| 996 | { |
| 997 | register struct breakpoint *b, *b1; |
| 998 | |
| 999 | if (arg == 0) |
| 1000 | { |
| 1001 | /* Ask user only if there are some breakpoints to delete. */ |
| 1002 | if (!from_tty |
| 1003 | || breakpoint_chain && query ("Delete all breakpoints? ")) |
| 1004 | { |
| 1005 | /* No arg; clear all breakpoints. */ |
| 1006 | while (breakpoint_chain) |
| 1007 | delete_breakpoint (breakpoint_chain); |
| 1008 | } |
| 1009 | } |
| 1010 | else |
| 1011 | map_breakpoint_numbers (arg, delete_breakpoint); |
| 1012 | } |
| 1013 | |
| 1014 | /* Delete all breakpoints. |
| 1015 | Done when new symtabs are loaded, since the break condition expressions |
| 1016 | may become invalid, and the breakpoints are probably wrong anyway. */ |
| 1017 | |
| 1018 | void |
| 1019 | clear_breakpoints () |
| 1020 | { |
| 1021 | delete_command (0, 0); |
| 1022 | } |
| 1023 | \f |
| 1024 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| 1025 | If from_tty is nonzero, it prints a message to that effect, |
| 1026 | which ends with a period (no newline). */ |
| 1027 | |
| 1028 | void |
| 1029 | set_ignore_count (bptnum, count, from_tty) |
| 1030 | int bptnum, count, from_tty; |
| 1031 | { |
| 1032 | register struct breakpoint *b; |
| 1033 | |
| 1034 | if (count < 0) |
| 1035 | count = 0; |
| 1036 | |
| 1037 | ALL_BREAKPOINTS (b) |
| 1038 | if (b->number == bptnum) |
| 1039 | { |
| 1040 | b->ignore_count = count; |
| 1041 | if (!from_tty) |
| 1042 | return; |
| 1043 | else if (count == 0) |
| 1044 | printf ("Will stop next time breakpoint %d is reached.", bptnum); |
| 1045 | else if (count == 1) |
| 1046 | printf ("Will ignore next crossing of breakpoint %d.", bptnum); |
| 1047 | else |
| 1048 | printf ("Will ignore next %d crossings of breakpoint %d.", |
| 1049 | count, bptnum); |
| 1050 | return; |
| 1051 | } |
| 1052 | |
| 1053 | error ("No breakpoint number %d.", bptnum); |
| 1054 | } |
| 1055 | |
| 1056 | /* Clear the ignore counts of all breakpoints. */ |
| 1057 | void |
| 1058 | breakpoint_clear_ignore_counts () |
| 1059 | { |
| 1060 | struct breakpoint *b; |
| 1061 | |
| 1062 | ALL_BREAKPOINTS (b) |
| 1063 | b->ignore_count = 0; |
| 1064 | } |
| 1065 | |
| 1066 | /* Command to set ignore-count of breakpoint N to COUNT. */ |
| 1067 | |
| 1068 | static void |
| 1069 | ignore_command (args, from_tty) |
| 1070 | char *args; |
| 1071 | int from_tty; |
| 1072 | { |
| 1073 | register char *p = args; |
| 1074 | register int num; |
| 1075 | |
| 1076 | if (p == 0) |
| 1077 | error_no_arg ("a breakpoint number"); |
| 1078 | |
| 1079 | while (*p >= '0' && *p <= '9') p++; |
| 1080 | if (*p && *p != ' ' && *p != '\t') |
| 1081 | error ("First argument must be a breakpoint number."); |
| 1082 | |
| 1083 | num = atoi (args); |
| 1084 | |
| 1085 | if (*p == 0) |
| 1086 | error ("Second argument (specified ignore-count) is missing."); |
| 1087 | |
| 1088 | set_ignore_count (num, parse_and_eval_address (p), from_tty); |
| 1089 | printf ("\n"); |
| 1090 | } |
| 1091 | \f |
| 1092 | /* Call FUNCTION on each of the breakpoints |
| 1093 | whose numbers are given in ARGS. */ |
| 1094 | |
| 1095 | static void |
| 1096 | map_breakpoint_numbers (args, function) |
| 1097 | char *args; |
| 1098 | void (*function) (); |
| 1099 | { |
| 1100 | register char *p = args; |
| 1101 | register char *p1; |
| 1102 | register int num; |
| 1103 | register struct breakpoint *b; |
| 1104 | |
| 1105 | if (p == 0) |
| 1106 | error_no_arg ("one or more breakpoint numbers"); |
| 1107 | |
| 1108 | while (*p) |
| 1109 | { |
| 1110 | p1 = p; |
| 1111 | while (*p1 >= '0' && *p1 <= '9') p1++; |
| 1112 | if (*p1 && *p1 != ' ' && *p1 != '\t') |
| 1113 | error ("Arguments must be breakpoint numbers."); |
| 1114 | |
| 1115 | num = atoi (p); |
| 1116 | |
| 1117 | ALL_BREAKPOINTS (b) |
| 1118 | if (b->number == num) |
| 1119 | { |
| 1120 | function (b); |
| 1121 | goto win; |
| 1122 | } |
| 1123 | printf ("No breakpoint number %d.\n", num); |
| 1124 | win: |
| 1125 | p = p1; |
| 1126 | while (*p == ' ' || *p == '\t') p++; |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | static void |
| 1131 | enable_breakpoint (bpt) |
| 1132 | struct breakpoint *bpt; |
| 1133 | { |
| 1134 | bpt->enable = enabled; |
| 1135 | |
| 1136 | if (xgdb_verbose && bpt->number >= 0) |
| 1137 | printf ("breakpoint #%d enabled\n", bpt->number); |
| 1138 | |
| 1139 | check_duplicates (bpt->address); |
| 1140 | } |
| 1141 | |
| 1142 | static void |
| 1143 | enable_command (args) |
| 1144 | char *args; |
| 1145 | { |
| 1146 | struct breakpoint *bpt; |
| 1147 | if (args == 0) |
| 1148 | ALL_BREAKPOINTS (bpt) |
| 1149 | enable_breakpoint (bpt); |
| 1150 | else |
| 1151 | map_breakpoint_numbers (args, enable_breakpoint); |
| 1152 | } |
| 1153 | |
| 1154 | static void |
| 1155 | disable_breakpoint (bpt) |
| 1156 | struct breakpoint *bpt; |
| 1157 | { |
| 1158 | bpt->enable = disabled; |
| 1159 | |
| 1160 | if (xgdb_verbose && bpt->number >= 0) |
| 1161 | printf ("breakpoint #%d disabled\n", bpt->number); |
| 1162 | |
| 1163 | check_duplicates (bpt->address); |
| 1164 | } |
| 1165 | |
| 1166 | static void |
| 1167 | disable_command (args) |
| 1168 | char *args; |
| 1169 | { |
| 1170 | register struct breakpoint *bpt; |
| 1171 | if (args == 0) |
| 1172 | ALL_BREAKPOINTS (bpt) |
| 1173 | disable_breakpoint (bpt); |
| 1174 | else |
| 1175 | map_breakpoint_numbers (args, disable_breakpoint); |
| 1176 | } |
| 1177 | |
| 1178 | static void |
| 1179 | enable_once_breakpoint (bpt) |
| 1180 | struct breakpoint *bpt; |
| 1181 | { |
| 1182 | bpt->enable = temporary; |
| 1183 | |
| 1184 | check_duplicates (bpt->address); |
| 1185 | } |
| 1186 | |
| 1187 | static void |
| 1188 | enable_once_command (args) |
| 1189 | char *args; |
| 1190 | { |
| 1191 | map_breakpoint_numbers (args, enable_once_breakpoint); |
| 1192 | } |
| 1193 | |
| 1194 | static void |
| 1195 | enable_delete_breakpoint (bpt) |
| 1196 | struct breakpoint *bpt; |
| 1197 | { |
| 1198 | bpt->enable = delete; |
| 1199 | |
| 1200 | check_duplicates (bpt->address); |
| 1201 | } |
| 1202 | |
| 1203 | static void |
| 1204 | enable_delete_command (args) |
| 1205 | char *args; |
| 1206 | { |
| 1207 | map_breakpoint_numbers (args, enable_delete_breakpoint); |
| 1208 | } |
| 1209 | \f |
| 1210 | /* |
| 1211 | * Use default_breakpoint_'s, or nothing if they aren't valid. |
| 1212 | */ |
| 1213 | struct symtabs_and_lines |
| 1214 | decode_line_spec_1 (string, funfirstline) |
| 1215 | char *string; |
| 1216 | int funfirstline; |
| 1217 | { |
| 1218 | struct symtabs_and_lines sals; |
| 1219 | if (string == 0) |
| 1220 | error ("Empty line specification."); |
| 1221 | if (default_breakpoint_valid) |
| 1222 | sals = decode_line_1 (&string, funfirstline, |
| 1223 | default_breakpoint_symtab, default_breakpoint_line); |
| 1224 | else |
| 1225 | sals = decode_line_1 (&string, funfirstline, 0, 0); |
| 1226 | if (*string) |
| 1227 | error ("Junk at end of line specification: %s", string); |
| 1228 | return sals; |
| 1229 | } |
| 1230 | \f |
| 1231 | |
| 1232 | /* Chain containing all defined enable commands. */ |
| 1233 | |
| 1234 | extern struct cmd_list_element |
| 1235 | *enablelist, *disablelist, |
| 1236 | *deletelist, *enablebreaklist; |
| 1237 | |
| 1238 | extern struct cmd_list_element *cmdlist; |
| 1239 | |
| 1240 | void |
| 1241 | _initialize_breakpoint () |
| 1242 | { |
| 1243 | breakpoint_chain = 0; |
| 1244 | breakpoint_count = 0; |
| 1245 | |
| 1246 | add_com ("ignore", class_breakpoint, ignore_command, |
| 1247 | "Set ignore-count of breakpoint number N to COUNT."); |
| 1248 | |
| 1249 | add_com ("commands", class_breakpoint, commands_command, |
| 1250 | "Set commands to be executed when a breakpoint is hit.\n\ |
| 1251 | Give breakpoint number as argument after \"commands\".\n\ |
| 1252 | With no argument, the targeted breakpoint is the last one set.\n\ |
| 1253 | The commands themselves follow starting on the next line.\n\ |
| 1254 | Type a line containing \"end\" to indicate the end of them.\n\ |
| 1255 | Give \"silent\" as the first line to make the breakpoint silent;\n\ |
| 1256 | then no output is printed when it is hit, except what the commands print."); |
| 1257 | |
| 1258 | add_com ("condition", class_breakpoint, condition_command, |
| 1259 | "Specify breakpoint number N to break only if COND is true.\n\ |
| 1260 | N is an integer; COND is a C expression to be evaluated whenever\n\ |
| 1261 | breakpoint N is reached. Actually break only when COND is nonzero."); |
| 1262 | |
| 1263 | add_com ("tbreak", class_breakpoint, tbreak_command, |
| 1264 | "Set a temporary breakpoint. Args like \"break\" command.\n\ |
| 1265 | Like \"break\" except the breakpoint is only enabled temporarily,\n\ |
| 1266 | so it will be disabled when hit. Equivalent to \"break\" followed\n\ |
| 1267 | by using \"enable once\" on the breakpoint number."); |
| 1268 | |
| 1269 | add_prefix_cmd ("enable", class_breakpoint, enable_command, |
| 1270 | "Enable some breakpoints or auto-display expressions.\n\ |
| 1271 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 1272 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| 1273 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 1274 | With a subcommand you can enable temporarily.\n\ |
| 1275 | \n\ |
| 1276 | The \"display\" subcommand applies to auto-displays instead of breakpoints.", |
| 1277 | &enablelist, "enable ", 1, &cmdlist); |
| 1278 | |
| 1279 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, |
| 1280 | "Enable some breakpoints or auto-display expressions.\n\ |
| 1281 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 1282 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| 1283 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 1284 | May be abbreviates to simply \"enable\".\n\ |
| 1285 | With a subcommand you can enable temporarily.", |
| 1286 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); |
| 1287 | |
| 1288 | add_cmd ("once", no_class, enable_once_command, |
| 1289 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| 1290 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ |
| 1291 | See the \"tbreak\" command which sets a breakpoint and enables it once.", |
| 1292 | &enablebreaklist); |
| 1293 | |
| 1294 | add_cmd ("delete", no_class, enable_delete_command, |
| 1295 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| 1296 | If a breakpoint is hit while enabled in this fashion, it is deleted.", |
| 1297 | &enablebreaklist); |
| 1298 | |
| 1299 | add_cmd ("delete", no_class, enable_delete_command, |
| 1300 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| 1301 | If a breakpoint is hit while enabled in this fashion, it is deleted.", |
| 1302 | &enablelist); |
| 1303 | |
| 1304 | add_cmd ("once", no_class, enable_once_command, |
| 1305 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| 1306 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ |
| 1307 | See the \"tbreak\" command which sets a breakpoint and enables it once.", |
| 1308 | &enablelist); |
| 1309 | |
| 1310 | add_prefix_cmd ("disable", class_breakpoint, disable_command, |
| 1311 | "Disable some breakpoints or auto-display expressions.\n\ |
| 1312 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 1313 | To disable all breakpoints, give no argument.\n\ |
| 1314 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ |
| 1315 | \n\ |
| 1316 | The \"display\" subcommand applies to auto-displays instead of breakpoints.", |
| 1317 | &disablelist, "disable ", 1, &cmdlist); |
| 1318 | add_com_alias ("dis", "disable", class_breakpoint, 1); |
| 1319 | add_com_alias ("disa", "disable", class_breakpoint, 1); |
| 1320 | |
| 1321 | add_abbrev_cmd ("breakpoints", class_breakpoint, disable_command, |
| 1322 | "Disable some breakpoints or auto-display expressions.\n\ |
| 1323 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 1324 | To disable all breakpoints, give no argument.\n\ |
| 1325 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ |
| 1326 | This command may be abbreviated \"disable\".", |
| 1327 | &disablelist); |
| 1328 | |
| 1329 | add_prefix_cmd ("delete", class_breakpoint, delete_command, |
| 1330 | "Delete some breakpoints or auto-display expressions.\n\ |
| 1331 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 1332 | To delete all breakpoints, give no argument.\n\ |
| 1333 | \n\ |
| 1334 | Also a prefix command for deletion of other GDB objects.\n\ |
| 1335 | The \"unset\" command is also an alias for \"delete\".", |
| 1336 | &deletelist, "delete ", 1, &cmdlist); |
| 1337 | add_com_alias ("d", "delete", class_breakpoint, 1); |
| 1338 | add_com_alias ("unset", "delete", class_alias, 1); |
| 1339 | |
| 1340 | add_cmd ("breakpoints", class_alias, delete_command, |
| 1341 | "Delete some breakpoints or auto-display expressions.\n\ |
| 1342 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 1343 | To delete all breakpoints, give no argument.\n\ |
| 1344 | This command may be abbreviated \"delete\".", |
| 1345 | &deletelist); |
| 1346 | |
| 1347 | add_com ("clear", class_breakpoint, clear_command, |
| 1348 | "Clear breakpoint at specified line or function.\n\ |
| 1349 | Argument may be line number, function name, or \"*\" and an address.\n\ |
| 1350 | If line number is specified, all breakpoints in that line are cleared.\n\ |
| 1351 | If function is specified, breakpoints at beginning of function are cleared.\n\ |
| 1352 | If an address is specified, breakpoints at that address are cleared.\n\n\ |
| 1353 | With no argument, clears all breakpoints in the line that the selected frame\n\ |
| 1354 | is executing in.\n\ |
| 1355 | \n\ |
| 1356 | See also the \"delete\" command which clears breakpoints by number."); |
| 1357 | |
| 1358 | add_com ("break", class_breakpoint, break_command, |
| 1359 | "Set breakpoint at specified line or function.\n\ |
| 1360 | Argument may be line number, function name, or \"*\" and an address.\n\ |
| 1361 | If line number is specified, break at start of code for that line.\n\ |
| 1362 | If function is specified, break at start of code for that function.\n\ |
| 1363 | If an address is specified, break at that exact address.\n\ |
| 1364 | With no arg, uses current execution address of selected stack frame.\n\ |
| 1365 | This is useful for breaking on return to a stack frame.\n\ |
| 1366 | \n\ |
| 1367 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ |
| 1368 | \n\ |
| 1369 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); |
| 1370 | add_com_alias ("b", "break", class_run, 1); |
| 1371 | add_com_alias ("br", "break", class_run, 1); |
| 1372 | add_com_alias ("bre", "break", class_run, 1); |
| 1373 | add_com_alias ("brea", "break", class_run, 1); |
| 1374 | |
| 1375 | add_info ("breakpoints", breakpoints_info, |
| 1376 | "Status of all breakpoints, or breakpoint number NUMBER.\n\ |
| 1377 | Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\ |
| 1378 | \"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\ |
| 1379 | Then come the address and the file/line number.\n\n\ |
| 1380 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 1381 | are set to the address of the last breakpoint listed."); |
| 1382 | } |
| 1383 | |