| 1 | /* Everything about breakpoints, for GDB. |
| 2 | Copyright 1986, 1987, 1989, 1990, 1991, 1992 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include <ctype.h> |
| 22 | #include "symtab.h" |
| 23 | #include "frame.h" |
| 24 | #include "breakpoint.h" |
| 25 | #include "gdbtypes.h" |
| 26 | #include "expression.h" |
| 27 | #include "gdbcore.h" |
| 28 | #include "gdbcmd.h" |
| 29 | #include "value.h" |
| 30 | #include "ctype.h" |
| 31 | #include "command.h" |
| 32 | #include "inferior.h" |
| 33 | #include "target.h" |
| 34 | #include "language.h" |
| 35 | #include <string.h> |
| 36 | #include "demangle.h" |
| 37 | |
| 38 | /* local function prototypes */ |
| 39 | |
| 40 | static void |
| 41 | catch_command_1 PARAMS ((char *, int, int)); |
| 42 | |
| 43 | static void |
| 44 | enable_delete_command PARAMS ((char *, int)); |
| 45 | |
| 46 | static void |
| 47 | enable_delete_breakpoint PARAMS ((struct breakpoint *)); |
| 48 | |
| 49 | static void |
| 50 | enable_once_command PARAMS ((char *, int)); |
| 51 | |
| 52 | static void |
| 53 | enable_once_breakpoint PARAMS ((struct breakpoint *)); |
| 54 | |
| 55 | static void |
| 56 | disable_command PARAMS ((char *, int)); |
| 57 | |
| 58 | static void |
| 59 | disable_breakpoint PARAMS ((struct breakpoint *)); |
| 60 | |
| 61 | static void |
| 62 | enable_command PARAMS ((char *, int)); |
| 63 | |
| 64 | static void |
| 65 | enable_breakpoint PARAMS ((struct breakpoint *)); |
| 66 | |
| 67 | static void |
| 68 | map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *))); |
| 69 | |
| 70 | static void |
| 71 | ignore_command PARAMS ((char *, int)); |
| 72 | |
| 73 | static int |
| 74 | breakpoint_re_set_one PARAMS ((char *)); |
| 75 | |
| 76 | static void |
| 77 | delete_command PARAMS ((char *, int)); |
| 78 | |
| 79 | static void |
| 80 | clear_command PARAMS ((char *, int)); |
| 81 | |
| 82 | static void |
| 83 | catch_command PARAMS ((char *, int)); |
| 84 | |
| 85 | static struct symtabs_and_lines |
| 86 | get_catch_sals PARAMS ((int)); |
| 87 | |
| 88 | static void |
| 89 | watch_command PARAMS ((char *, int)); |
| 90 | |
| 91 | static void |
| 92 | tbreak_command PARAMS ((char *, int)); |
| 93 | |
| 94 | static void |
| 95 | break_command_1 PARAMS ((char *, int, int)); |
| 96 | |
| 97 | static void |
| 98 | mention PARAMS ((struct breakpoint *)); |
| 99 | |
| 100 | static struct breakpoint * |
| 101 | set_raw_breakpoint PARAMS ((struct symtab_and_line)); |
| 102 | |
| 103 | static void |
| 104 | check_duplicates PARAMS ((CORE_ADDR)); |
| 105 | |
| 106 | static void |
| 107 | describe_other_breakpoints PARAMS ((CORE_ADDR)); |
| 108 | |
| 109 | static void |
| 110 | breakpoints_info PARAMS ((char *, int)); |
| 111 | |
| 112 | static void |
| 113 | breakpoint_1 PARAMS ((int, int)); |
| 114 | |
| 115 | static bpstat |
| 116 | bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); |
| 117 | |
| 118 | static int |
| 119 | breakpoint_cond_eval PARAMS ((char *)); |
| 120 | |
| 121 | static void |
| 122 | cleanup_executing_breakpoints PARAMS ((int)); |
| 123 | |
| 124 | static void |
| 125 | commands_command PARAMS ((char *, int)); |
| 126 | |
| 127 | static void |
| 128 | condition_command PARAMS ((char *, int)); |
| 129 | |
| 130 | static int |
| 131 | get_number PARAMS ((char **)); |
| 132 | |
| 133 | static void |
| 134 | set_breakpoint_count PARAMS ((int)); |
| 135 | |
| 136 | |
| 137 | extern int addressprint; /* Print machine addresses? */ |
| 138 | extern int demangle; /* Print de-mangled symbol names? */ |
| 139 | |
| 140 | /* Are we executing breakpoint commands? */ |
| 141 | static int executing_breakpoint_commands; |
| 142 | |
| 143 | /* Walk the following statement or block through all breakpoints. |
| 144 | ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current |
| 145 | breakpoint. */ |
| 146 | |
| 147 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) |
| 148 | |
| 149 | #define ALL_BREAKPOINTS_SAFE(b,tmp) \ |
| 150 | for (b = breakpoint_chain; \ |
| 151 | b? (tmp=b->next, 1): 0; \ |
| 152 | b = tmp) |
| 153 | |
| 154 | /* Chain of all breakpoints defined. */ |
| 155 | |
| 156 | struct breakpoint *breakpoint_chain; |
| 157 | |
| 158 | /* Number of last breakpoint made. */ |
| 159 | |
| 160 | static int breakpoint_count; |
| 161 | |
| 162 | /* Set breakpoint count to NUM. */ |
| 163 | static void |
| 164 | set_breakpoint_count (num) |
| 165 | int num; |
| 166 | { |
| 167 | breakpoint_count = num; |
| 168 | set_internalvar (lookup_internalvar ("bpnum"), |
| 169 | value_from_longest (builtin_type_int, (LONGEST) num)); |
| 170 | } |
| 171 | |
| 172 | /* Default address, symtab and line to put a breakpoint at |
| 173 | for "break" command with no arg. |
| 174 | if default_breakpoint_valid is zero, the other three are |
| 175 | not valid, and "break" with no arg is an error. |
| 176 | |
| 177 | This set by print_stack_frame, which calls set_default_breakpoint. */ |
| 178 | |
| 179 | int default_breakpoint_valid; |
| 180 | CORE_ADDR default_breakpoint_address; |
| 181 | struct symtab *default_breakpoint_symtab; |
| 182 | int default_breakpoint_line; |
| 183 | |
| 184 | /* Flag indicating extra verbosity for xgdb. */ |
| 185 | extern int xgdb_verbose; |
| 186 | \f |
| 187 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. |
| 188 | Advance *PP after the string and any trailing whitespace. |
| 189 | |
| 190 | Currently the string can either be a number or "$" followed by the name |
| 191 | of a convenience variable. Making it an expression wouldn't work well |
| 192 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ |
| 193 | static int |
| 194 | get_number (pp) |
| 195 | char **pp; |
| 196 | { |
| 197 | int retval; |
| 198 | char *p = *pp; |
| 199 | |
| 200 | if (p == NULL) |
| 201 | /* Empty line means refer to the last breakpoint. */ |
| 202 | return breakpoint_count; |
| 203 | else if (*p == '$') |
| 204 | { |
| 205 | /* Make a copy of the name, so we can null-terminate it |
| 206 | to pass to lookup_internalvar(). */ |
| 207 | char *varname; |
| 208 | char *start = ++p; |
| 209 | value val; |
| 210 | |
| 211 | while (isalnum (*p) || *p == '_') |
| 212 | p++; |
| 213 | varname = (char *) alloca (p - start + 1); |
| 214 | strncpy (varname, start, p - start); |
| 215 | varname[p - start] = '\0'; |
| 216 | val = value_of_internalvar (lookup_internalvar (varname)); |
| 217 | if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT) |
| 218 | error ( |
| 219 | "Convenience variables used to specify breakpoints must have integer values." |
| 220 | ); |
| 221 | retval = (int) value_as_long (val); |
| 222 | } |
| 223 | else |
| 224 | { |
| 225 | if (*p == '-') |
| 226 | ++p; |
| 227 | while (*p >= '0' && *p <= '9') |
| 228 | ++p; |
| 229 | if (p == *pp) |
| 230 | /* There is no number here. (e.g. "cond a == b"). */ |
| 231 | error_no_arg ("breakpoint number"); |
| 232 | retval = atoi (*pp); |
| 233 | } |
| 234 | if (!(isspace (*p) || *p == '\0')) |
| 235 | error ("breakpoint number expected"); |
| 236 | while (isspace (*p)) |
| 237 | p++; |
| 238 | *pp = p; |
| 239 | return retval; |
| 240 | } |
| 241 | \f |
| 242 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ |
| 243 | |
| 244 | static void |
| 245 | condition_command (arg, from_tty) |
| 246 | char *arg; |
| 247 | int from_tty; |
| 248 | { |
| 249 | register struct breakpoint *b; |
| 250 | char *p; |
| 251 | register int bnum; |
| 252 | |
| 253 | if (arg == 0) |
| 254 | error_no_arg ("breakpoint number"); |
| 255 | |
| 256 | p = arg; |
| 257 | bnum = get_number (&p); |
| 258 | |
| 259 | ALL_BREAKPOINTS (b) |
| 260 | if (b->number == bnum) |
| 261 | { |
| 262 | if (b->cond) |
| 263 | { |
| 264 | free ((PTR)b->cond); |
| 265 | b->cond = 0; |
| 266 | } |
| 267 | if (b->cond_string != NULL) |
| 268 | free ((PTR)b->cond_string); |
| 269 | |
| 270 | if (*p == 0) |
| 271 | { |
| 272 | b->cond = 0; |
| 273 | b->cond_string = NULL; |
| 274 | if (from_tty) |
| 275 | printf_filtered ("Breakpoint %d now unconditional.\n", bnum); |
| 276 | } |
| 277 | else |
| 278 | { |
| 279 | arg = p; |
| 280 | /* I don't know if it matters whether this is the string the user |
| 281 | typed in or the decompiled expression. */ |
| 282 | b->cond_string = savestring (arg, strlen (arg)); |
| 283 | b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); |
| 284 | if (*arg) |
| 285 | error ("Junk at end of expression"); |
| 286 | } |
| 287 | return; |
| 288 | } |
| 289 | |
| 290 | error ("No breakpoint number %d.", bnum); |
| 291 | } |
| 292 | |
| 293 | /* ARGSUSED */ |
| 294 | static void |
| 295 | commands_command (arg, from_tty) |
| 296 | char *arg; |
| 297 | int from_tty; |
| 298 | { |
| 299 | register struct breakpoint *b; |
| 300 | char *p; |
| 301 | register int bnum; |
| 302 | struct command_line *l; |
| 303 | |
| 304 | /* If we allowed this, we would have problems with when to |
| 305 | free the storage, if we change the commands currently |
| 306 | being read from. */ |
| 307 | |
| 308 | if (executing_breakpoint_commands) |
| 309 | error ("Can't use the \"commands\" command among a breakpoint's commands."); |
| 310 | |
| 311 | p = arg; |
| 312 | bnum = get_number (&p); |
| 313 | if (p && *p) |
| 314 | error ("Unexpected extra arguments following breakpoint number."); |
| 315 | |
| 316 | ALL_BREAKPOINTS (b) |
| 317 | if (b->number == bnum) |
| 318 | { |
| 319 | if (from_tty && input_from_terminal_p ()) |
| 320 | printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\ |
| 321 | End with a line saying just \"end\".\n", bnum); |
| 322 | l = read_command_lines (); |
| 323 | free_command_lines (&b->commands); |
| 324 | b->commands = l; |
| 325 | return; |
| 326 | } |
| 327 | error ("No breakpoint number %d.", bnum); |
| 328 | } |
| 329 | \f |
| 330 | extern int memory_breakpoint_size; /* from mem-break.c */ |
| 331 | |
| 332 | /* Like target_read_memory() but if breakpoints are inserted, return |
| 333 | the shadow contents instead of the breakpoints themselves. |
| 334 | |
| 335 | Read "memory data" from whatever target or inferior we have. |
| 336 | Returns zero if successful, errno value if not. EIO is used |
| 337 | for address out of bounds. If breakpoints are inserted, returns |
| 338 | shadow contents, not the breakpoints themselves. From breakpoint.c. */ |
| 339 | |
| 340 | int |
| 341 | read_memory_nobpt (memaddr, myaddr, len) |
| 342 | CORE_ADDR memaddr; |
| 343 | char *myaddr; |
| 344 | unsigned len; |
| 345 | { |
| 346 | int status; |
| 347 | struct breakpoint *b; |
| 348 | |
| 349 | if (memory_breakpoint_size < 0) |
| 350 | /* No breakpoints on this machine. */ |
| 351 | return target_read_memory (memaddr, myaddr, len); |
| 352 | |
| 353 | ALL_BREAKPOINTS (b) |
| 354 | { |
| 355 | if (b->type == bp_watchpoint || !b->inserted) |
| 356 | continue; |
| 357 | else if (b->address + memory_breakpoint_size <= memaddr) |
| 358 | /* The breakpoint is entirely before the chunk of memory |
| 359 | we are reading. */ |
| 360 | continue; |
| 361 | else if (b->address >= memaddr + len) |
| 362 | /* The breakpoint is entirely after the chunk of memory we |
| 363 | are reading. */ |
| 364 | continue; |
| 365 | else |
| 366 | { |
| 367 | /* Copy the breakpoint from the shadow contents, and recurse |
| 368 | for the things before and after. */ |
| 369 | |
| 370 | /* Addresses and length of the part of the breakpoint that |
| 371 | we need to copy. */ |
| 372 | CORE_ADDR membpt = b->address; |
| 373 | unsigned int bptlen = memory_breakpoint_size; |
| 374 | /* Offset within shadow_contents. */ |
| 375 | int bptoffset = 0; |
| 376 | |
| 377 | if (membpt < memaddr) |
| 378 | { |
| 379 | /* Only copy the second part of the breakpoint. */ |
| 380 | bptlen -= memaddr - membpt; |
| 381 | bptoffset = memaddr - membpt; |
| 382 | membpt = memaddr; |
| 383 | } |
| 384 | |
| 385 | if (membpt + bptlen > memaddr + len) |
| 386 | { |
| 387 | /* Only copy the first part of the breakpoint. */ |
| 388 | bptlen -= (membpt + bptlen) - (memaddr + len); |
| 389 | } |
| 390 | |
| 391 | memcpy (myaddr + membpt - memaddr, |
| 392 | b->shadow_contents + bptoffset, bptlen); |
| 393 | |
| 394 | if (membpt > memaddr) |
| 395 | { |
| 396 | /* Copy the section of memory before the breakpoint. */ |
| 397 | status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr); |
| 398 | if (status != 0) |
| 399 | return status; |
| 400 | } |
| 401 | |
| 402 | if (membpt + bptlen < memaddr + len) |
| 403 | { |
| 404 | /* Copy the section of memory after the breakpoint. */ |
| 405 | status = read_memory_nobpt |
| 406 | (membpt + bptlen, |
| 407 | myaddr + membpt + bptlen - memaddr, |
| 408 | memaddr + len - (membpt + bptlen)); |
| 409 | if (status != 0) |
| 410 | return status; |
| 411 | } |
| 412 | return 0; |
| 413 | } |
| 414 | } |
| 415 | /* Nothing overlaps. Just call read_memory_noerr. */ |
| 416 | return target_read_memory (memaddr, myaddr, len); |
| 417 | } |
| 418 | \f |
| 419 | /* insert_breakpoints is used when starting or continuing the program. |
| 420 | remove_breakpoints is used when the program stops. |
| 421 | Both return zero if successful, |
| 422 | or an `errno' value if could not write the inferior. */ |
| 423 | |
| 424 | int |
| 425 | insert_breakpoints () |
| 426 | { |
| 427 | register struct breakpoint *b; |
| 428 | int val = 0; |
| 429 | int disabled_breaks = 0; |
| 430 | |
| 431 | ALL_BREAKPOINTS (b) |
| 432 | if (b->type != bp_watchpoint |
| 433 | && b->enable != disabled |
| 434 | && ! b->inserted |
| 435 | && ! b->duplicate) |
| 436 | { |
| 437 | val = target_insert_breakpoint(b->address, b->shadow_contents); |
| 438 | if (val) |
| 439 | { |
| 440 | /* Can't set the breakpoint. */ |
| 441 | #if defined (DISABLE_UNSETTABLE_BREAK) |
| 442 | if (DISABLE_UNSETTABLE_BREAK (b->address)) |
| 443 | { |
| 444 | val = 0; |
| 445 | b->enable = disabled; |
| 446 | if (!disabled_breaks) |
| 447 | { |
| 448 | fprintf (stderr, |
| 449 | "Cannot insert breakpoint %d:\n", b->number); |
| 450 | printf_filtered ("Disabling shared library breakpoints:\n"); |
| 451 | } |
| 452 | disabled_breaks = 1; |
| 453 | printf_filtered ("%d ", b->number); |
| 454 | } |
| 455 | else |
| 456 | #endif |
| 457 | { |
| 458 | fprintf (stderr, "Cannot insert breakpoint %d:\n", b->number); |
| 459 | #ifdef ONE_PROCESS_WRITETEXT |
| 460 | fprintf (stderr, |
| 461 | "The same program may be running in another process.\n"); |
| 462 | #endif |
| 463 | memory_error (val, b->address); /* which bombs us out */ |
| 464 | } |
| 465 | } |
| 466 | else |
| 467 | b->inserted = 1; |
| 468 | } |
| 469 | if (disabled_breaks) |
| 470 | printf_filtered ("\n"); |
| 471 | return val; |
| 472 | } |
| 473 | |
| 474 | int |
| 475 | remove_breakpoints () |
| 476 | { |
| 477 | register struct breakpoint *b; |
| 478 | int val; |
| 479 | |
| 480 | #ifdef BREAKPOINT_DEBUG |
| 481 | printf ("Removing breakpoints.\n"); |
| 482 | #endif /* BREAKPOINT_DEBUG */ |
| 483 | |
| 484 | ALL_BREAKPOINTS (b) |
| 485 | if (b->type != bp_watchpoint && b->inserted) |
| 486 | { |
| 487 | val = target_remove_breakpoint(b->address, b->shadow_contents); |
| 488 | if (val) |
| 489 | return val; |
| 490 | b->inserted = 0; |
| 491 | #ifdef BREAKPOINT_DEBUG |
| 492 | printf ("Removed breakpoint at %s", |
| 493 | local_hex_string(b->address)); |
| 494 | printf (", shadow %s", |
| 495 | local_hex_string(b->shadow_contents[0])); |
| 496 | printf (", %s.\n", |
| 497 | local_hex_string(b->shadow_contents[1])); |
| 498 | #endif /* BREAKPOINT_DEBUG */ |
| 499 | } |
| 500 | |
| 501 | return 0; |
| 502 | } |
| 503 | |
| 504 | /* Clear the "inserted" flag in all breakpoints. |
| 505 | This is done when the inferior is loaded. */ |
| 506 | |
| 507 | void |
| 508 | mark_breakpoints_out () |
| 509 | { |
| 510 | register struct breakpoint *b; |
| 511 | |
| 512 | ALL_BREAKPOINTS (b) |
| 513 | b->inserted = 0; |
| 514 | } |
| 515 | |
| 516 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. |
| 517 | When continuing from a location with a breakpoint, |
| 518 | we actually single step once before calling insert_breakpoints. */ |
| 519 | |
| 520 | int |
| 521 | breakpoint_here_p (pc) |
| 522 | CORE_ADDR pc; |
| 523 | { |
| 524 | register struct breakpoint *b; |
| 525 | |
| 526 | ALL_BREAKPOINTS (b) |
| 527 | if (b->enable != disabled && b->address == pc) |
| 528 | return 1; |
| 529 | |
| 530 | return 0; |
| 531 | } |
| 532 | \f |
| 533 | /* bpstat stuff. External routines' interfaces are documented |
| 534 | in breakpoint.h. */ |
| 535 | |
| 536 | /* Clear a bpstat so that it says we are not at any breakpoint. |
| 537 | Also free any storage that is part of a bpstat. */ |
| 538 | |
| 539 | void |
| 540 | bpstat_clear (bsp) |
| 541 | bpstat *bsp; |
| 542 | { |
| 543 | bpstat p; |
| 544 | bpstat q; |
| 545 | |
| 546 | if (bsp == 0) |
| 547 | return; |
| 548 | p = *bsp; |
| 549 | while (p != NULL) |
| 550 | { |
| 551 | q = p->next; |
| 552 | if (p->old_val != NULL) |
| 553 | value_free (p->old_val); |
| 554 | free ((PTR)p); |
| 555 | p = q; |
| 556 | } |
| 557 | *bsp = NULL; |
| 558 | } |
| 559 | |
| 560 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
| 561 | is part of the bpstat is copied as well. */ |
| 562 | |
| 563 | bpstat |
| 564 | bpstat_copy (bs) |
| 565 | bpstat bs; |
| 566 | { |
| 567 | bpstat p = NULL; |
| 568 | bpstat tmp; |
| 569 | bpstat retval; |
| 570 | |
| 571 | if (bs == NULL) |
| 572 | return bs; |
| 573 | |
| 574 | for (; bs != NULL; bs = bs->next) |
| 575 | { |
| 576 | tmp = (bpstat) xmalloc (sizeof (*tmp)); |
| 577 | memcpy (tmp, bs, sizeof (*tmp)); |
| 578 | if (p == NULL) |
| 579 | /* This is the first thing in the chain. */ |
| 580 | retval = tmp; |
| 581 | else |
| 582 | p->next = tmp; |
| 583 | p = tmp; |
| 584 | } |
| 585 | p->next = NULL; |
| 586 | return retval; |
| 587 | } |
| 588 | |
| 589 | /* Find the bpstat associated with this breakpoint */ |
| 590 | |
| 591 | bpstat |
| 592 | bpstat_find_breakpoint(bsp, breakpoint) |
| 593 | bpstat bsp; |
| 594 | struct breakpoint *breakpoint; |
| 595 | { |
| 596 | if (bsp == NULL) return NULL; |
| 597 | |
| 598 | for (;bsp != NULL; bsp = bsp->next) { |
| 599 | if (bsp->breakpoint_at == breakpoint) return bsp; |
| 600 | } |
| 601 | return NULL; |
| 602 | } |
| 603 | |
| 604 | /* Return the breakpoint number of the first breakpoint we are stopped |
| 605 | at. *BSP upon return is a bpstat which points to the remaining |
| 606 | breakpoints stopped at (but which is not guaranteed to be good for |
| 607 | anything but further calls to bpstat_num). |
| 608 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ |
| 609 | |
| 610 | int |
| 611 | bpstat_num (bsp) |
| 612 | bpstat *bsp; |
| 613 | { |
| 614 | struct breakpoint *b; |
| 615 | |
| 616 | if ((*bsp) == NULL) |
| 617 | return 0; /* No more breakpoint values */ |
| 618 | else |
| 619 | { |
| 620 | b = (*bsp)->breakpoint_at; |
| 621 | *bsp = (*bsp)->next; |
| 622 | if (b == NULL) |
| 623 | return -1; /* breakpoint that's been deleted since */ |
| 624 | else |
| 625 | return b->number; /* We have its number */ |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | /* Modify BS so that the actions will not be performed. */ |
| 630 | |
| 631 | void |
| 632 | bpstat_clear_actions (bs) |
| 633 | bpstat bs; |
| 634 | { |
| 635 | for (; bs != NULL; bs = bs->next) |
| 636 | { |
| 637 | bs->commands = NULL; |
| 638 | if (bs->old_val != NULL) |
| 639 | { |
| 640 | value_free (bs->old_val); |
| 641 | bs->old_val = NULL; |
| 642 | } |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | /* Stub for cleaning up our state if we error-out of a breakpoint command */ |
| 647 | /* ARGSUSED */ |
| 648 | static void |
| 649 | cleanup_executing_breakpoints (ignore) |
| 650 | int ignore; |
| 651 | { |
| 652 | executing_breakpoint_commands = 0; |
| 653 | } |
| 654 | |
| 655 | /* Execute all the commands associated with all the breakpoints at this |
| 656 | location. Any of these commands could cause the process to proceed |
| 657 | beyond this point, etc. We look out for such changes by checking |
| 658 | the global "breakpoint_proceeded" after each command. */ |
| 659 | |
| 660 | void |
| 661 | bpstat_do_actions (bsp) |
| 662 | bpstat *bsp; |
| 663 | { |
| 664 | bpstat bs; |
| 665 | struct cleanup *old_chain; |
| 666 | |
| 667 | executing_breakpoint_commands = 1; |
| 668 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); |
| 669 | |
| 670 | top: |
| 671 | bs = *bsp; |
| 672 | |
| 673 | breakpoint_proceeded = 0; |
| 674 | for (; bs != NULL; bs = bs->next) |
| 675 | { |
| 676 | while (bs->commands) |
| 677 | { |
| 678 | char *line = bs->commands->line; |
| 679 | bs->commands = bs->commands->next; |
| 680 | execute_command (line, 0); |
| 681 | /* If the inferior is proceeded by the command, bomb out now. |
| 682 | The bpstat chain has been blown away by wait_for_inferior. |
| 683 | But since execution has stopped again, there is a new bpstat |
| 684 | to look at, so start over. */ |
| 685 | if (breakpoint_proceeded) |
| 686 | goto top; |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | executing_breakpoint_commands = 0; |
| 691 | discard_cleanups (old_chain); |
| 692 | } |
| 693 | |
| 694 | /* This is the normal print_it function for a bpstat. In the future, |
| 695 | much of this logic could (should?) be moved to bpstat_stop_status, |
| 696 | by having it set different print_it functions. */ |
| 697 | |
| 698 | static int |
| 699 | print_it_normal (bs) |
| 700 | bpstat bs; |
| 701 | { |
| 702 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint |
| 703 | which has since been deleted. */ |
| 704 | if (bs->breakpoint_at == NULL |
| 705 | || (bs->breakpoint_at->type != bp_breakpoint |
| 706 | && bs->breakpoint_at->type != bp_watchpoint)) |
| 707 | return 0; |
| 708 | |
| 709 | /* If bpstat_stop_status says don't print, OK, we won't. An example |
| 710 | circumstance is when we single-stepped for both a watchpoint and |
| 711 | for a "stepi" instruction. The bpstat says that the watchpoint |
| 712 | explains the stop, but we shouldn't print because the watchpoint's |
| 713 | value didn't change -- and the real reason we are stopping here |
| 714 | rather than continuing to step (as the watchpoint would've had us do) |
| 715 | is because of the "stepi". */ |
| 716 | if (!bs->print) |
| 717 | return 0; |
| 718 | |
| 719 | if (bs->breakpoint_at->type == bp_breakpoint) |
| 720 | { |
| 721 | /* I think the user probably only wants to see one breakpoint |
| 722 | number, not all of them. */ |
| 723 | printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); |
| 724 | return 0; |
| 725 | } |
| 726 | |
| 727 | if (bs->old_val != NULL) |
| 728 | { |
| 729 | printf_filtered ("\nWatchpoint %d, ", bs->breakpoint_at->number); |
| 730 | print_expression (bs->breakpoint_at->exp, stdout); |
| 731 | printf_filtered ("\nOld value = "); |
| 732 | value_print (bs->old_val, stdout, 0, Val_pretty_default); |
| 733 | printf_filtered ("\nNew value = "); |
| 734 | value_print (bs->breakpoint_at->val, stdout, 0, |
| 735 | Val_pretty_default); |
| 736 | printf_filtered ("\n"); |
| 737 | value_free (bs->old_val); |
| 738 | bs->old_val = NULL; |
| 739 | return 0; |
| 740 | } |
| 741 | /* We can't deal with it. Maybe another member of the bpstat chain can. */ |
| 742 | return -1; |
| 743 | } |
| 744 | |
| 745 | /* Print a message indicating what happened. Returns nonzero to |
| 746 | say that only the source line should be printed after this (zero |
| 747 | return means print the frame as well as the source line). */ |
| 748 | /* Currently we always return zero. */ |
| 749 | int |
| 750 | bpstat_print (bs) |
| 751 | bpstat bs; |
| 752 | { |
| 753 | int val; |
| 754 | |
| 755 | if (bs == NULL) |
| 756 | return 0; |
| 757 | |
| 758 | val = (*bs->print_it) (bs); |
| 759 | if (val >= 0) |
| 760 | return val; |
| 761 | |
| 762 | /* Maybe another breakpoint in the chain caused us to stop. |
| 763 | (Currently all watchpoints go on the bpstat whether hit or |
| 764 | not. That probably could (should) be changed, provided care is taken |
| 765 | with respect to bpstat_explains_signal). */ |
| 766 | if (bs->next) |
| 767 | return bpstat_print (bs->next); |
| 768 | |
| 769 | fprintf_filtered (stderr, "gdb internal error: in bpstat_print\n"); |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | /* Evaluate the expression EXP and return 1 if value is zero. |
| 774 | This is used inside a catch_errors to evaluate the breakpoint condition. |
| 775 | The argument is a "struct expression *" that has been cast to char * to |
| 776 | make it pass through catch_errors. */ |
| 777 | |
| 778 | static int |
| 779 | breakpoint_cond_eval (exp) |
| 780 | char *exp; |
| 781 | { |
| 782 | return !value_true (evaluate_expression ((struct expression *)exp)); |
| 783 | } |
| 784 | |
| 785 | /* Allocate a new bpstat and chain it to the current one. */ |
| 786 | |
| 787 | static bpstat |
| 788 | bpstat_alloc (b, cbs) |
| 789 | register struct breakpoint *b; |
| 790 | bpstat cbs; /* Current "bs" value */ |
| 791 | { |
| 792 | bpstat bs; |
| 793 | |
| 794 | bs = (bpstat) xmalloc (sizeof (*bs)); |
| 795 | cbs->next = bs; |
| 796 | bs->breakpoint_at = b; |
| 797 | /* If the condition is false, etc., don't do the commands. */ |
| 798 | bs->commands = NULL; |
| 799 | bs->momentary = b->disposition == delete; |
| 800 | bs->old_val = NULL; |
| 801 | bs->print_it = print_it_normal; |
| 802 | return bs; |
| 803 | } |
| 804 | |
| 805 | /* Possible return values for watchpoint_check (this can't be an enum |
| 806 | because of check_errors). */ |
| 807 | /* The watchpoint has been disabled. */ |
| 808 | #define WP_DISABLED 1 |
| 809 | /* The value has changed. */ |
| 810 | #define WP_VALUE_CHANGED 2 |
| 811 | /* The value has not changed. */ |
| 812 | #define WP_VALUE_NOT_CHANGED 3 |
| 813 | |
| 814 | /* Check watchpoint condition. */ |
| 815 | static int |
| 816 | watchpoint_check (p) |
| 817 | PTR p; |
| 818 | { |
| 819 | bpstat bs = (bpstat) p; |
| 820 | |
| 821 | int within_current_scope; |
| 822 | if (bs->breakpoint_at->exp_valid_block != NULL) |
| 823 | within_current_scope = |
| 824 | contained_in (get_selected_block (), bs->breakpoint_at->exp_valid_block); |
| 825 | else |
| 826 | within_current_scope = 1; |
| 827 | |
| 828 | if (within_current_scope) |
| 829 | { |
| 830 | /* We use value_{,free_to_}mark because it could be a |
| 831 | *long* time before we return to the command level and |
| 832 | call free_all_values. */ |
| 833 | /* But couldn't we just call free_all_values instead? */ |
| 834 | |
| 835 | value mark = value_mark (); |
| 836 | value new_val = evaluate_expression (bs->breakpoint_at->exp); |
| 837 | if (!value_equal (bs->breakpoint_at->val, new_val)) |
| 838 | { |
| 839 | release_value (new_val); |
| 840 | value_free_to_mark (mark); |
| 841 | bs->old_val = bs->breakpoint_at->val; |
| 842 | bs->breakpoint_at->val = new_val; |
| 843 | /* We will stop here */ |
| 844 | return WP_VALUE_CHANGED; |
| 845 | } |
| 846 | else |
| 847 | { |
| 848 | /* Nothing changed, don't do anything. */ |
| 849 | value_free_to_mark (mark); |
| 850 | /* We won't stop here */ |
| 851 | return WP_VALUE_NOT_CHANGED; |
| 852 | } |
| 853 | } |
| 854 | else |
| 855 | { |
| 856 | /* This seems like the only logical thing to do because |
| 857 | if we temporarily ignored the watchpoint, then when |
| 858 | we reenter the block in which it is valid it contains |
| 859 | garbage (in the case of a function, it may have two |
| 860 | garbage values, one before and one after the prologue). |
| 861 | So we can't even detect the first assignment to it and |
| 862 | watch after that (since the garbage may or may not equal |
| 863 | the first value assigned). */ |
| 864 | bs->breakpoint_at->enable = disabled; |
| 865 | printf_filtered ("\ |
| 866 | Watchpoint %d disabled because the program has left the block in\n\ |
| 867 | which its expression is valid.\n", bs->breakpoint_at->number); |
| 868 | return WP_DISABLED; |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | /* This is used when everything which needs to be printed has |
| 873 | already been printed. But we still want to print the frame. */ |
| 874 | static int |
| 875 | print_it_noop (bs) |
| 876 | bpstat bs; |
| 877 | { |
| 878 | return 0; |
| 879 | } |
| 880 | |
| 881 | /* Determine whether we stopped at a breakpoint, etc, or whether we |
| 882 | don't understand this stop. Result is a chain of bpstat's such that: |
| 883 | |
| 884 | if we don't understand the stop, the result is a null pointer. |
| 885 | |
| 886 | if we understand why we stopped, the result is not null, and |
| 887 | the first element of the chain contains summary "stop" and |
| 888 | "print" flags for the whole chain. |
| 889 | |
| 890 | Each element of the chain refers to a particular breakpoint or |
| 891 | watchpoint at which we have stopped. (We may have stopped for |
| 892 | several reasons concurrently.) |
| 893 | |
| 894 | Each element of the chain has valid next, breakpoint_at, |
| 895 | commands, FIXME??? fields. |
| 896 | |
| 897 | */ |
| 898 | |
| 899 | |
| 900 | bpstat |
| 901 | bpstat_stop_status (pc, frame_address) |
| 902 | CORE_ADDR *pc; |
| 903 | FRAME_ADDR frame_address; |
| 904 | { |
| 905 | register struct breakpoint *b; |
| 906 | int stop = 0; |
| 907 | int print = 0; |
| 908 | CORE_ADDR bp_addr; |
| 909 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
| 910 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ |
| 911 | int real_breakpoint = 0; |
| 912 | #endif |
| 913 | /* Root of the chain of bpstat's */ |
| 914 | struct bpstat root_bs[1]; |
| 915 | /* Pointer to the last thing in the chain currently. */ |
| 916 | bpstat bs = root_bs; |
| 917 | |
| 918 | /* Get the address where the breakpoint would have been. */ |
| 919 | bp_addr = *pc - DECR_PC_AFTER_BREAK; |
| 920 | |
| 921 | ALL_BREAKPOINTS (b) |
| 922 | { |
| 923 | int this_bp_stop; |
| 924 | int this_bp_print; |
| 925 | |
| 926 | if (b->enable == disabled) |
| 927 | continue; |
| 928 | |
| 929 | if (b->type != bp_watchpoint && b->address != bp_addr) |
| 930 | continue; |
| 931 | |
| 932 | /* Come here if it's a watchpoint, or if the break address matches */ |
| 933 | |
| 934 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ |
| 935 | |
| 936 | this_bp_stop = 1; |
| 937 | this_bp_print = 1; |
| 938 | |
| 939 | if (b->type == bp_watchpoint) |
| 940 | { |
| 941 | static char message1[] = |
| 942 | "Error evaluating expression for watchpoint %d\n"; |
| 943 | char message[sizeof (message1) + 30 /* slop */]; |
| 944 | sprintf (message, message1, b->number); |
| 945 | switch (catch_errors (watchpoint_check, (char *) bs, message)) |
| 946 | { |
| 947 | case WP_DISABLED: |
| 948 | /* We've already printed what needs to be printed. */ |
| 949 | bs->print_it = print_it_noop; |
| 950 | /* Stop. */ |
| 951 | break; |
| 952 | case WP_VALUE_CHANGED: |
| 953 | /* Stop. */ |
| 954 | break; |
| 955 | case WP_VALUE_NOT_CHANGED: |
| 956 | /* Don't stop. */ |
| 957 | continue; |
| 958 | default: |
| 959 | /* Can't happen. */ |
| 960 | /* FALLTHROUGH */ |
| 961 | case 0: |
| 962 | /* Error from catch_errors. */ |
| 963 | b->enable = disabled; |
| 964 | printf_filtered ("Watchpoint %d disabled.\n", b->number); |
| 965 | /* We've already printed what needs to be printed. */ |
| 966 | bs->print_it = print_it_noop; |
| 967 | /* Stop. */ |
| 968 | break; |
| 969 | } |
| 970 | } |
| 971 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
| 972 | else |
| 973 | real_breakpoint = 1; |
| 974 | #endif |
| 975 | |
| 976 | if (b->frame && b->frame != frame_address) |
| 977 | this_bp_stop = 0; |
| 978 | else |
| 979 | { |
| 980 | int value_is_zero; |
| 981 | |
| 982 | if (b->cond) |
| 983 | { |
| 984 | /* Need to select the frame, with all that implies |
| 985 | so that the conditions will have the right context. */ |
| 986 | select_frame (get_current_frame (), 0); |
| 987 | value_is_zero |
| 988 | = catch_errors (breakpoint_cond_eval, (char *)(b->cond), |
| 989 | "Error in testing breakpoint condition:\n"); |
| 990 | /* FIXME-someday, should give breakpoint # */ |
| 991 | free_all_values (); |
| 992 | } |
| 993 | if (b->cond && value_is_zero) |
| 994 | { |
| 995 | this_bp_stop = 0; |
| 996 | } |
| 997 | else if (b->ignore_count > 0) |
| 998 | { |
| 999 | b->ignore_count--; |
| 1000 | this_bp_stop = 0; |
| 1001 | } |
| 1002 | else |
| 1003 | { |
| 1004 | /* We will stop here */ |
| 1005 | if (b->disposition == disable) |
| 1006 | b->enable = disabled; |
| 1007 | bs->commands = b->commands; |
| 1008 | if (b->silent) |
| 1009 | this_bp_print = 0; |
| 1010 | if (bs->commands && STREQ ("silent", bs->commands->line)) |
| 1011 | { |
| 1012 | bs->commands = bs->commands->next; |
| 1013 | this_bp_print = 0; |
| 1014 | } |
| 1015 | } |
| 1016 | } |
| 1017 | if (this_bp_stop) |
| 1018 | stop = 1; |
| 1019 | if (this_bp_print) |
| 1020 | print = 1; |
| 1021 | } |
| 1022 | |
| 1023 | bs->next = NULL; /* Terminate the chain */ |
| 1024 | bs = root_bs->next; /* Re-grab the head of the chain */ |
| 1025 | if (bs) |
| 1026 | { |
| 1027 | bs->stop = stop; |
| 1028 | bs->print = print; |
| 1029 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
| 1030 | if (real_breakpoint) |
| 1031 | { |
| 1032 | *pc = bp_addr; |
| 1033 | #if defined (SHIFT_INST_REGS) |
| 1034 | { |
| 1035 | CORE_ADDR pc = read_register (PC_REGNUM); |
| 1036 | CORE_ADDR npc = read_register (NPC_REGNUM); |
| 1037 | if (pc != npc) |
| 1038 | { |
| 1039 | write_register (NNPC_REGNUM, npc); |
| 1040 | write_register (NPC_REGNUM, pc); |
| 1041 | } |
| 1042 | } |
| 1043 | #else /* No SHIFT_INST_REGS. */ |
| 1044 | write_pc (bp_addr); |
| 1045 | #endif /* No SHIFT_INST_REGS. */ |
| 1046 | } |
| 1047 | #endif /* DECR_PC_AFTER_BREAK != 0. */ |
| 1048 | } |
| 1049 | return bs; |
| 1050 | } |
| 1051 | |
| 1052 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
| 1053 | without hardware support). This isn't related to a specific bpstat, |
| 1054 | just to things like whether watchpoints are set. */ |
| 1055 | |
| 1056 | int |
| 1057 | bpstat_should_step () |
| 1058 | { |
| 1059 | struct breakpoint *b; |
| 1060 | ALL_BREAKPOINTS (b) |
| 1061 | if (b->enable == enabled && b->type == bp_watchpoint) |
| 1062 | return 1; |
| 1063 | return 0; |
| 1064 | } |
| 1065 | \f |
| 1066 | /* Print information on breakpoint number BNUM, or -1 if all. |
| 1067 | If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS |
| 1068 | is nonzero, process only watchpoints. */ |
| 1069 | |
| 1070 | static void |
| 1071 | breakpoint_1 (bnum, allflag) |
| 1072 | int bnum; |
| 1073 | int allflag; |
| 1074 | { |
| 1075 | register struct breakpoint *b; |
| 1076 | register struct command_line *l; |
| 1077 | register struct symbol *sym; |
| 1078 | CORE_ADDR last_addr = (CORE_ADDR)-1; |
| 1079 | int found_a_breakpoint = 0; |
| 1080 | static char *bptypes[] = {"breakpoint", "until", "finish", "watchpoint", |
| 1081 | "longjmp", "longjmp resume"}; |
| 1082 | static char *bpdisps[] = {"del", "dis", "keep"}; |
| 1083 | static char bpenables[] = "ny"; |
| 1084 | |
| 1085 | if (!breakpoint_chain) |
| 1086 | { |
| 1087 | printf_filtered ("No breakpoints or watchpoints.\n"); |
| 1088 | return; |
| 1089 | } |
| 1090 | |
| 1091 | ALL_BREAKPOINTS (b) |
| 1092 | if (bnum == -1 |
| 1093 | || bnum == b->number) |
| 1094 | { |
| 1095 | /* We only print out user settable breakpoints unless the allflag is set. */ |
| 1096 | if (!allflag |
| 1097 | && b->type != bp_breakpoint |
| 1098 | && b->type != bp_watchpoint) |
| 1099 | continue; |
| 1100 | |
| 1101 | if (!found_a_breakpoint++) |
| 1102 | printf_filtered ("Num Type Disp Enb %sWhat\n", |
| 1103 | addressprint ? "Address " : ""); |
| 1104 | |
| 1105 | printf_filtered ("%-3d %-14s %-4s %-3c ", |
| 1106 | b->number, |
| 1107 | bptypes[(int)b->type], |
| 1108 | bpdisps[(int)b->disposition], |
| 1109 | bpenables[(int)b->enable]); |
| 1110 | switch (b->type) |
| 1111 | { |
| 1112 | case bp_watchpoint: |
| 1113 | print_expression (b->exp, stdout); |
| 1114 | break; |
| 1115 | case bp_breakpoint: |
| 1116 | case bp_until: |
| 1117 | case bp_finish: |
| 1118 | case bp_longjmp: |
| 1119 | case bp_longjmp_resume: |
| 1120 | if (addressprint) |
| 1121 | printf_filtered ("%s ", local_hex_string_custom(b->address, "08")); |
| 1122 | |
| 1123 | last_addr = b->address; |
| 1124 | if (b->symtab) |
| 1125 | { |
| 1126 | sym = find_pc_function (b->address); |
| 1127 | if (sym) |
| 1128 | { |
| 1129 | fputs_filtered ("in ", stdout); |
| 1130 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), stdout); |
| 1131 | fputs_filtered (" at ", stdout); |
| 1132 | } |
| 1133 | fputs_filtered (b->symtab->filename, stdout); |
| 1134 | printf_filtered (":%d", b->line_number); |
| 1135 | } |
| 1136 | else |
| 1137 | print_address_symbolic (b->address, stdout, demangle, " "); |
| 1138 | } |
| 1139 | |
| 1140 | printf_filtered ("\n"); |
| 1141 | |
| 1142 | if (b->frame) |
| 1143 | printf_filtered ("\tstop only in stack frame at %s\n", |
| 1144 | local_hex_string(b->frame)); |
| 1145 | if (b->cond) |
| 1146 | { |
| 1147 | printf_filtered ("\tstop only if "); |
| 1148 | print_expression (b->cond, stdout); |
| 1149 | printf_filtered ("\n"); |
| 1150 | } |
| 1151 | if (b->ignore_count) |
| 1152 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); |
| 1153 | if ((l = b->commands)) |
| 1154 | while (l) |
| 1155 | { |
| 1156 | fputs_filtered ("\t", stdout); |
| 1157 | fputs_filtered (l->line, stdout); |
| 1158 | fputs_filtered ("\n", stdout); |
| 1159 | l = l->next; |
| 1160 | } |
| 1161 | } |
| 1162 | |
| 1163 | if (!found_a_breakpoint |
| 1164 | && bnum != -1) |
| 1165 | printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum); |
| 1166 | else |
| 1167 | /* Compare against (CORE_ADDR)-1 in case some compiler decides |
| 1168 | that a comparison of an unsigned with -1 is always false. */ |
| 1169 | if (last_addr != (CORE_ADDR)-1) |
| 1170 | set_next_address (last_addr); |
| 1171 | } |
| 1172 | |
| 1173 | /* ARGSUSED */ |
| 1174 | static void |
| 1175 | breakpoints_info (bnum_exp, from_tty) |
| 1176 | char *bnum_exp; |
| 1177 | int from_tty; |
| 1178 | { |
| 1179 | int bnum = -1; |
| 1180 | |
| 1181 | if (bnum_exp) |
| 1182 | bnum = parse_and_eval_address (bnum_exp); |
| 1183 | |
| 1184 | breakpoint_1 (bnum, 0); |
| 1185 | } |
| 1186 | |
| 1187 | #if MAINTENANCE_CMDS |
| 1188 | |
| 1189 | /* ARGSUSED */ |
| 1190 | static void |
| 1191 | maintenance_info_breakpoints (bnum_exp, from_tty) |
| 1192 | char *bnum_exp; |
| 1193 | int from_tty; |
| 1194 | { |
| 1195 | int bnum = -1; |
| 1196 | |
| 1197 | if (bnum_exp) |
| 1198 | bnum = parse_and_eval_address (bnum_exp); |
| 1199 | |
| 1200 | breakpoint_1 (bnum, 1); |
| 1201 | } |
| 1202 | |
| 1203 | #endif |
| 1204 | |
| 1205 | /* Print a message describing any breakpoints set at PC. */ |
| 1206 | |
| 1207 | static void |
| 1208 | describe_other_breakpoints (pc) |
| 1209 | register CORE_ADDR pc; |
| 1210 | { |
| 1211 | register int others = 0; |
| 1212 | register struct breakpoint *b; |
| 1213 | |
| 1214 | ALL_BREAKPOINTS (b) |
| 1215 | if (b->address == pc) |
| 1216 | others++; |
| 1217 | if (others > 0) |
| 1218 | { |
| 1219 | printf ("Note: breakpoint%s ", (others > 1) ? "s" : ""); |
| 1220 | ALL_BREAKPOINTS (b) |
| 1221 | if (b->address == pc) |
| 1222 | { |
| 1223 | others--; |
| 1224 | printf ("%d%s%s ", |
| 1225 | b->number, |
| 1226 | (b->enable == disabled) ? " (disabled)" : "", |
| 1227 | (others > 1) ? "," : ((others == 1) ? " and" : "")); |
| 1228 | } |
| 1229 | printf ("also set at pc %s.\n", local_hex_string(pc)); |
| 1230 | } |
| 1231 | } |
| 1232 | \f |
| 1233 | /* Set the default place to put a breakpoint |
| 1234 | for the `break' command with no arguments. */ |
| 1235 | |
| 1236 | void |
| 1237 | set_default_breakpoint (valid, addr, symtab, line) |
| 1238 | int valid; |
| 1239 | CORE_ADDR addr; |
| 1240 | struct symtab *symtab; |
| 1241 | int line; |
| 1242 | { |
| 1243 | default_breakpoint_valid = valid; |
| 1244 | default_breakpoint_address = addr; |
| 1245 | default_breakpoint_symtab = symtab; |
| 1246 | default_breakpoint_line = line; |
| 1247 | } |
| 1248 | |
| 1249 | /* Rescan breakpoints at address ADDRESS, |
| 1250 | marking the first one as "first" and any others as "duplicates". |
| 1251 | This is so that the bpt instruction is only inserted once. */ |
| 1252 | |
| 1253 | static void |
| 1254 | check_duplicates (address) |
| 1255 | CORE_ADDR address; |
| 1256 | { |
| 1257 | register struct breakpoint *b; |
| 1258 | register int count = 0; |
| 1259 | |
| 1260 | if (address == 0) /* Watchpoints are uninteresting */ |
| 1261 | return; |
| 1262 | |
| 1263 | ALL_BREAKPOINTS (b) |
| 1264 | if (b->enable != disabled && b->address == address) |
| 1265 | { |
| 1266 | count++; |
| 1267 | b->duplicate = count > 1; |
| 1268 | } |
| 1269 | } |
| 1270 | |
| 1271 | /* Low level routine to set a breakpoint. |
| 1272 | Takes as args the three things that every breakpoint must have. |
| 1273 | Returns the breakpoint object so caller can set other things. |
| 1274 | Does not set the breakpoint number! |
| 1275 | Does not print anything. |
| 1276 | |
| 1277 | ==> This routine should not be called if there is a chance of later |
| 1278 | error(); otherwise it leaves a bogus breakpoint on the chain. Validate |
| 1279 | your arguments BEFORE calling this routine! */ |
| 1280 | |
| 1281 | static struct breakpoint * |
| 1282 | set_raw_breakpoint (sal) |
| 1283 | struct symtab_and_line sal; |
| 1284 | { |
| 1285 | register struct breakpoint *b, *b1; |
| 1286 | |
| 1287 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); |
| 1288 | memset (b, 0, sizeof (*b)); |
| 1289 | b->address = sal.pc; |
| 1290 | b->symtab = sal.symtab; |
| 1291 | b->line_number = sal.line; |
| 1292 | b->enable = enabled; |
| 1293 | b->next = 0; |
| 1294 | b->silent = 0; |
| 1295 | b->ignore_count = 0; |
| 1296 | b->commands = NULL; |
| 1297 | b->frame = 0; |
| 1298 | |
| 1299 | /* Add this breakpoint to the end of the chain |
| 1300 | so that a list of breakpoints will come out in order |
| 1301 | of increasing numbers. */ |
| 1302 | |
| 1303 | b1 = breakpoint_chain; |
| 1304 | if (b1 == 0) |
| 1305 | breakpoint_chain = b; |
| 1306 | else |
| 1307 | { |
| 1308 | while (b1->next) |
| 1309 | b1 = b1->next; |
| 1310 | b1->next = b; |
| 1311 | } |
| 1312 | |
| 1313 | check_duplicates (sal.pc); |
| 1314 | |
| 1315 | return b; |
| 1316 | } |
| 1317 | |
| 1318 | static void |
| 1319 | create_longjmp_breakpoint(func_name) |
| 1320 | char *func_name; |
| 1321 | { |
| 1322 | struct symtab_and_line sal; |
| 1323 | struct breakpoint *b; |
| 1324 | static int internal_breakpoint_number = -1; |
| 1325 | |
| 1326 | if (func_name != NULL) |
| 1327 | { |
| 1328 | struct minimal_symbol *m; |
| 1329 | |
| 1330 | m = lookup_minimal_symbol(func_name, (struct objfile *)NULL); |
| 1331 | if (m) |
| 1332 | sal.pc = SYMBOL_VALUE_ADDRESS (m); |
| 1333 | else |
| 1334 | return; |
| 1335 | } |
| 1336 | else |
| 1337 | sal.pc = 0; |
| 1338 | |
| 1339 | sal.symtab = NULL; |
| 1340 | sal.line = 0; |
| 1341 | |
| 1342 | b = set_raw_breakpoint(sal); |
| 1343 | if (!b) return; |
| 1344 | |
| 1345 | b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume; |
| 1346 | b->disposition = donttouch; |
| 1347 | b->enable = disabled; |
| 1348 | b->silent = 1; |
| 1349 | if (func_name) |
| 1350 | b->addr_string = strsave(func_name); |
| 1351 | b->number = internal_breakpoint_number--; |
| 1352 | } |
| 1353 | |
| 1354 | /* Call this routine when stepping and nexting to enable a breakpoint if we do |
| 1355 | a longjmp(). When we hit that breakpoint, call |
| 1356 | set_longjmp_resume_breakpoint() to figure out where we are going. */ |
| 1357 | |
| 1358 | void |
| 1359 | enable_longjmp_breakpoint() |
| 1360 | { |
| 1361 | register struct breakpoint *b; |
| 1362 | |
| 1363 | ALL_BREAKPOINTS (b) |
| 1364 | if (b->type == bp_longjmp) |
| 1365 | { |
| 1366 | b->enable = enabled; |
| 1367 | check_duplicates (b->address); |
| 1368 | } |
| 1369 | } |
| 1370 | |
| 1371 | void |
| 1372 | disable_longjmp_breakpoint() |
| 1373 | { |
| 1374 | register struct breakpoint *b; |
| 1375 | |
| 1376 | ALL_BREAKPOINTS (b) |
| 1377 | if ( b->type == bp_longjmp |
| 1378 | || b->type == bp_longjmp_resume) |
| 1379 | { |
| 1380 | b->enable = disabled; |
| 1381 | check_duplicates (b->address); |
| 1382 | } |
| 1383 | } |
| 1384 | |
| 1385 | /* Call this after hitting the longjmp() breakpoint. Use this to set a new |
| 1386 | breakpoint at the target of the jmp_buf. |
| 1387 | |
| 1388 | FIXME - This ought to be done by setting a temporary breakpoint that gets |
| 1389 | deleted automatically... |
| 1390 | */ |
| 1391 | |
| 1392 | void |
| 1393 | set_longjmp_resume_breakpoint(pc, frame) |
| 1394 | CORE_ADDR pc; |
| 1395 | FRAME frame; |
| 1396 | { |
| 1397 | register struct breakpoint *b; |
| 1398 | |
| 1399 | ALL_BREAKPOINTS (b) |
| 1400 | if (b->type == bp_longjmp_resume) |
| 1401 | { |
| 1402 | b->address = pc; |
| 1403 | b->enable = enabled; |
| 1404 | if (frame != NULL) |
| 1405 | b->frame = FRAME_FP(frame); |
| 1406 | else |
| 1407 | b->frame = 0; |
| 1408 | check_duplicates (b->address); |
| 1409 | return; |
| 1410 | } |
| 1411 | } |
| 1412 | |
| 1413 | /* Set a breakpoint that will evaporate an end of command |
| 1414 | at address specified by SAL. |
| 1415 | Restrict it to frame FRAME if FRAME is nonzero. */ |
| 1416 | |
| 1417 | struct breakpoint * |
| 1418 | set_momentary_breakpoint (sal, frame, type) |
| 1419 | struct symtab_and_line sal; |
| 1420 | FRAME frame; |
| 1421 | enum bptype type; |
| 1422 | { |
| 1423 | register struct breakpoint *b; |
| 1424 | b = set_raw_breakpoint (sal); |
| 1425 | b->type = type; |
| 1426 | b->enable = enabled; |
| 1427 | b->disposition = donttouch; |
| 1428 | b->frame = (frame ? FRAME_FP (frame) : 0); |
| 1429 | return b; |
| 1430 | } |
| 1431 | |
| 1432 | #if 0 |
| 1433 | void |
| 1434 | clear_momentary_breakpoints () |
| 1435 | { |
| 1436 | register struct breakpoint *b; |
| 1437 | ALL_BREAKPOINTS (b) |
| 1438 | if (b->disposition == delete) |
| 1439 | { |
| 1440 | delete_breakpoint (b); |
| 1441 | break; |
| 1442 | } |
| 1443 | } |
| 1444 | #endif |
| 1445 | \f |
| 1446 | /* Tell the user we have just set a breakpoint B. */ |
| 1447 | static void |
| 1448 | mention (b) |
| 1449 | struct breakpoint *b; |
| 1450 | { |
| 1451 | switch (b->type) |
| 1452 | { |
| 1453 | case bp_watchpoint: |
| 1454 | printf_filtered ("Watchpoint %d: ", b->number); |
| 1455 | print_expression (b->exp, stdout); |
| 1456 | break; |
| 1457 | case bp_breakpoint: |
| 1458 | printf_filtered ("Breakpoint %d at %s", b->number, |
| 1459 | local_hex_string(b->address)); |
| 1460 | if (b->symtab) |
| 1461 | printf_filtered (": file %s, line %d.", |
| 1462 | b->symtab->filename, b->line_number); |
| 1463 | break; |
| 1464 | case bp_until: |
| 1465 | case bp_finish: |
| 1466 | case bp_longjmp: |
| 1467 | case bp_longjmp_resume: |
| 1468 | break; |
| 1469 | } |
| 1470 | printf_filtered ("\n"); |
| 1471 | } |
| 1472 | |
| 1473 | #if 0 |
| 1474 | /* Nobody calls this currently. */ |
| 1475 | /* Set a breakpoint from a symtab and line. |
| 1476 | If TEMPFLAG is nonzero, it is a temporary breakpoint. |
| 1477 | ADDR_STRING is a malloc'd string holding the name of where we are |
| 1478 | setting the breakpoint. This is used later to re-set it after the |
| 1479 | program is relinked and symbols are reloaded. |
| 1480 | Print the same confirmation messages that the breakpoint command prints. */ |
| 1481 | |
| 1482 | void |
| 1483 | set_breakpoint (s, line, tempflag, addr_string) |
| 1484 | struct symtab *s; |
| 1485 | int line; |
| 1486 | int tempflag; |
| 1487 | char *addr_string; |
| 1488 | { |
| 1489 | register struct breakpoint *b; |
| 1490 | struct symtab_and_line sal; |
| 1491 | |
| 1492 | sal.symtab = s; |
| 1493 | sal.line = line; |
| 1494 | sal.pc = 0; |
| 1495 | resolve_sal_pc (&sal); /* Might error out */ |
| 1496 | describe_other_breakpoints (sal.pc); |
| 1497 | |
| 1498 | b = set_raw_breakpoint (sal); |
| 1499 | set_breakpoint_count (breakpoint_count + 1); |
| 1500 | b->number = breakpoint_count; |
| 1501 | b->type = bp_breakpoint; |
| 1502 | b->cond = 0; |
| 1503 | b->addr_string = addr_string; |
| 1504 | b->enable = enabled; |
| 1505 | b->disposition = tempflag ? delete : donttouch; |
| 1506 | |
| 1507 | mention (b); |
| 1508 | } |
| 1509 | #endif /* 0 */ |
| 1510 | \f |
| 1511 | /* Set a breakpoint according to ARG (function, linenum or *address) |
| 1512 | and make it temporary if TEMPFLAG is nonzero. */ |
| 1513 | |
| 1514 | static void |
| 1515 | break_command_1 (arg, tempflag, from_tty) |
| 1516 | char *arg; |
| 1517 | int tempflag, from_tty; |
| 1518 | { |
| 1519 | struct symtabs_and_lines sals; |
| 1520 | struct symtab_and_line sal; |
| 1521 | register struct expression *cond = 0; |
| 1522 | register struct breakpoint *b; |
| 1523 | |
| 1524 | /* Pointers in arg to the start, and one past the end, of the condition. */ |
| 1525 | char *cond_start = NULL; |
| 1526 | char *cond_end; |
| 1527 | /* Pointers in arg to the start, and one past the end, |
| 1528 | of the address part. */ |
| 1529 | char *addr_start = NULL; |
| 1530 | char *addr_end; |
| 1531 | |
| 1532 | int i; |
| 1533 | |
| 1534 | sals.sals = NULL; |
| 1535 | sals.nelts = 0; |
| 1536 | |
| 1537 | sal.line = sal.pc = sal.end = 0; |
| 1538 | sal.symtab = 0; |
| 1539 | |
| 1540 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ |
| 1541 | |
| 1542 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' |
| 1543 | && (arg[2] == ' ' || arg[2] == '\t'))) |
| 1544 | { |
| 1545 | if (default_breakpoint_valid) |
| 1546 | { |
| 1547 | sals.sals = (struct symtab_and_line *) |
| 1548 | xmalloc (sizeof (struct symtab_and_line)); |
| 1549 | sal.pc = default_breakpoint_address; |
| 1550 | sal.line = default_breakpoint_line; |
| 1551 | sal.symtab = default_breakpoint_symtab; |
| 1552 | sals.sals[0] = sal; |
| 1553 | sals.nelts = 1; |
| 1554 | } |
| 1555 | else |
| 1556 | error ("No default breakpoint address now."); |
| 1557 | } |
| 1558 | else |
| 1559 | { |
| 1560 | addr_start = arg; |
| 1561 | |
| 1562 | /* Force almost all breakpoints to be in terms of the |
| 1563 | current_source_symtab (which is decode_line_1's default). This |
| 1564 | should produce the results we want almost all of the time while |
| 1565 | leaving default_breakpoint_* alone. */ |
| 1566 | if (default_breakpoint_valid |
| 1567 | && (!current_source_symtab |
| 1568 | || (arg && (*arg == '+' || *arg == '-')))) |
| 1569 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| 1570 | default_breakpoint_line); |
| 1571 | else |
| 1572 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0); |
| 1573 | |
| 1574 | addr_end = arg; |
| 1575 | } |
| 1576 | |
| 1577 | if (! sals.nelts) |
| 1578 | return; |
| 1579 | |
| 1580 | /* Resolve all line numbers to PC's, and verify that conditions |
| 1581 | can be parsed, before setting any breakpoints. */ |
| 1582 | for (i = 0; i < sals.nelts; i++) |
| 1583 | { |
| 1584 | resolve_sal_pc (&sals.sals[i]); |
| 1585 | |
| 1586 | while (arg && *arg) |
| 1587 | { |
| 1588 | if (arg[0] == 'i' && arg[1] == 'f' |
| 1589 | && (arg[2] == ' ' || arg[2] == '\t')) |
| 1590 | { |
| 1591 | arg += 2; |
| 1592 | cond_start = arg; |
| 1593 | cond = parse_exp_1 (&arg, block_for_pc (sals.sals[i].pc), 0); |
| 1594 | cond_end = arg; |
| 1595 | } |
| 1596 | else |
| 1597 | error ("Junk at end of arguments."); |
| 1598 | } |
| 1599 | } |
| 1600 | |
| 1601 | /* Now set all the breakpoints. */ |
| 1602 | for (i = 0; i < sals.nelts; i++) |
| 1603 | { |
| 1604 | sal = sals.sals[i]; |
| 1605 | |
| 1606 | if (from_tty) |
| 1607 | describe_other_breakpoints (sal.pc); |
| 1608 | |
| 1609 | b = set_raw_breakpoint (sal); |
| 1610 | set_breakpoint_count (breakpoint_count + 1); |
| 1611 | b->number = breakpoint_count; |
| 1612 | b->type = bp_breakpoint; |
| 1613 | b->cond = cond; |
| 1614 | |
| 1615 | /* FIXME: We should add the filename if this is a static function |
| 1616 | and probably if it is a line number (the line numbers could |
| 1617 | have changed when we re-read symbols; possibly better to disable |
| 1618 | the breakpoint in that case). */ |
| 1619 | if (addr_start) |
| 1620 | b->addr_string = savestring (addr_start, addr_end - addr_start); |
| 1621 | if (cond_start) |
| 1622 | b->cond_string = savestring (cond_start, cond_end - cond_start); |
| 1623 | |
| 1624 | b->enable = enabled; |
| 1625 | b->disposition = tempflag ? delete : donttouch; |
| 1626 | |
| 1627 | mention (b); |
| 1628 | } |
| 1629 | |
| 1630 | if (sals.nelts > 1) |
| 1631 | { |
| 1632 | printf ("Multiple breakpoints were set.\n"); |
| 1633 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); |
| 1634 | } |
| 1635 | free ((PTR)sals.sals); |
| 1636 | } |
| 1637 | |
| 1638 | /* Helper function for break_command_1 and disassemble_command. */ |
| 1639 | |
| 1640 | void |
| 1641 | resolve_sal_pc (sal) |
| 1642 | struct symtab_and_line *sal; |
| 1643 | { |
| 1644 | CORE_ADDR pc; |
| 1645 | |
| 1646 | if (sal->pc == 0 && sal->symtab != 0) |
| 1647 | { |
| 1648 | pc = find_line_pc (sal->symtab, sal->line); |
| 1649 | if (pc == 0) |
| 1650 | error ("No line %d in file \"%s\".", |
| 1651 | sal->line, sal->symtab->filename); |
| 1652 | sal->pc = pc; |
| 1653 | } |
| 1654 | } |
| 1655 | |
| 1656 | void |
| 1657 | break_command (arg, from_tty) |
| 1658 | char *arg; |
| 1659 | int from_tty; |
| 1660 | { |
| 1661 | break_command_1 (arg, 0, from_tty); |
| 1662 | } |
| 1663 | |
| 1664 | static void |
| 1665 | tbreak_command (arg, from_tty) |
| 1666 | char *arg; |
| 1667 | int from_tty; |
| 1668 | { |
| 1669 | break_command_1 (arg, 1, from_tty); |
| 1670 | } |
| 1671 | |
| 1672 | /* ARGSUSED */ |
| 1673 | static void |
| 1674 | watch_command (arg, from_tty) |
| 1675 | char *arg; |
| 1676 | int from_tty; |
| 1677 | { |
| 1678 | struct breakpoint *b; |
| 1679 | struct symtab_and_line sal; |
| 1680 | struct expression *exp; |
| 1681 | struct block *exp_valid_block; |
| 1682 | struct value *val; |
| 1683 | |
| 1684 | sal.pc = 0; |
| 1685 | sal.symtab = NULL; |
| 1686 | sal.line = 0; |
| 1687 | |
| 1688 | /* Parse arguments. */ |
| 1689 | innermost_block = NULL; |
| 1690 | exp = parse_expression (arg); |
| 1691 | exp_valid_block = innermost_block; |
| 1692 | val = evaluate_expression (exp); |
| 1693 | release_value (val); |
| 1694 | if (VALUE_LAZY (val)) |
| 1695 | value_fetch_lazy (val); |
| 1696 | |
| 1697 | /* Now set up the breakpoint. */ |
| 1698 | b = set_raw_breakpoint (sal); |
| 1699 | set_breakpoint_count (breakpoint_count + 1); |
| 1700 | b->number = breakpoint_count; |
| 1701 | b->type = bp_watchpoint; |
| 1702 | b->disposition = donttouch; |
| 1703 | b->exp = exp; |
| 1704 | b->exp_valid_block = exp_valid_block; |
| 1705 | b->val = val; |
| 1706 | b->cond = 0; |
| 1707 | b->cond_string = NULL; |
| 1708 | b->exp_string = savestring (arg, strlen (arg)); |
| 1709 | mention (b); |
| 1710 | } |
| 1711 | \f |
| 1712 | /* |
| 1713 | * Helper routine for the until_command routine in infcmd.c. Here |
| 1714 | * because it uses the mechanisms of breakpoints. |
| 1715 | */ |
| 1716 | /* ARGSUSED */ |
| 1717 | void |
| 1718 | until_break_command (arg, from_tty) |
| 1719 | char *arg; |
| 1720 | int from_tty; |
| 1721 | { |
| 1722 | struct symtabs_and_lines sals; |
| 1723 | struct symtab_and_line sal; |
| 1724 | FRAME prev_frame = get_prev_frame (selected_frame); |
| 1725 | struct breakpoint *breakpoint; |
| 1726 | struct cleanup *old_chain; |
| 1727 | |
| 1728 | clear_proceed_status (); |
| 1729 | |
| 1730 | /* Set a breakpoint where the user wants it and at return from |
| 1731 | this function */ |
| 1732 | |
| 1733 | if (default_breakpoint_valid) |
| 1734 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| 1735 | default_breakpoint_line); |
| 1736 | else |
| 1737 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0); |
| 1738 | |
| 1739 | if (sals.nelts != 1) |
| 1740 | error ("Couldn't get information on specified line."); |
| 1741 | |
| 1742 | sal = sals.sals[0]; |
| 1743 | free ((PTR)sals.sals); /* malloc'd, so freed */ |
| 1744 | |
| 1745 | if (*arg) |
| 1746 | error ("Junk at end of arguments."); |
| 1747 | |
| 1748 | resolve_sal_pc (&sal); |
| 1749 | |
| 1750 | breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); |
| 1751 | |
| 1752 | old_chain = make_cleanup(delete_breakpoint, breakpoint); |
| 1753 | |
| 1754 | /* Keep within the current frame */ |
| 1755 | |
| 1756 | if (prev_frame) |
| 1757 | { |
| 1758 | struct frame_info *fi; |
| 1759 | |
| 1760 | fi = get_frame_info (prev_frame); |
| 1761 | sal = find_pc_line (fi->pc, 0); |
| 1762 | sal.pc = fi->pc; |
| 1763 | breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); |
| 1764 | make_cleanup(delete_breakpoint, breakpoint); |
| 1765 | } |
| 1766 | |
| 1767 | proceed (-1, -1, 0); |
| 1768 | do_cleanups(old_chain); |
| 1769 | } |
| 1770 | \f |
| 1771 | #if 0 |
| 1772 | /* These aren't used; I don't konw what they were for. */ |
| 1773 | /* Set a breakpoint at the catch clause for NAME. */ |
| 1774 | static int |
| 1775 | catch_breakpoint (name) |
| 1776 | char *name; |
| 1777 | { |
| 1778 | } |
| 1779 | |
| 1780 | static int |
| 1781 | disable_catch_breakpoint () |
| 1782 | { |
| 1783 | } |
| 1784 | |
| 1785 | static int |
| 1786 | delete_catch_breakpoint () |
| 1787 | { |
| 1788 | } |
| 1789 | |
| 1790 | static int |
| 1791 | enable_catch_breakpoint () |
| 1792 | { |
| 1793 | } |
| 1794 | #endif /* 0 */ |
| 1795 | |
| 1796 | struct sal_chain |
| 1797 | { |
| 1798 | struct sal_chain *next; |
| 1799 | struct symtab_and_line sal; |
| 1800 | }; |
| 1801 | |
| 1802 | #if 0 |
| 1803 | /* This isn't used; I don't know what it was for. */ |
| 1804 | /* For each catch clause identified in ARGS, run FUNCTION |
| 1805 | with that clause as an argument. */ |
| 1806 | static struct symtabs_and_lines |
| 1807 | map_catch_names (args, function) |
| 1808 | char *args; |
| 1809 | int (*function)(); |
| 1810 | { |
| 1811 | register char *p = args; |
| 1812 | register char *p1; |
| 1813 | struct symtabs_and_lines sals; |
| 1814 | #if 0 |
| 1815 | struct sal_chain *sal_chain = 0; |
| 1816 | #endif |
| 1817 | |
| 1818 | if (p == 0) |
| 1819 | error_no_arg ("one or more catch names"); |
| 1820 | |
| 1821 | sals.nelts = 0; |
| 1822 | sals.sals = NULL; |
| 1823 | |
| 1824 | while (*p) |
| 1825 | { |
| 1826 | p1 = p; |
| 1827 | /* Don't swallow conditional part. */ |
| 1828 | if (p1[0] == 'i' && p1[1] == 'f' |
| 1829 | && (p1[2] == ' ' || p1[2] == '\t')) |
| 1830 | break; |
| 1831 | |
| 1832 | if (isalpha (*p1)) |
| 1833 | { |
| 1834 | p1++; |
| 1835 | while (isalnum (*p1) || *p1 == '_' || *p1 == '$') |
| 1836 | p1++; |
| 1837 | } |
| 1838 | |
| 1839 | if (*p1 && *p1 != ' ' && *p1 != '\t') |
| 1840 | error ("Arguments must be catch names."); |
| 1841 | |
| 1842 | *p1 = 0; |
| 1843 | #if 0 |
| 1844 | if (function (p)) |
| 1845 | { |
| 1846 | struct sal_chain *next |
| 1847 | = (struct sal_chain *)alloca (sizeof (struct sal_chain)); |
| 1848 | next->next = sal_chain; |
| 1849 | next->sal = get_catch_sal (p); |
| 1850 | sal_chain = next; |
| 1851 | goto win; |
| 1852 | } |
| 1853 | #endif |
| 1854 | printf ("No catch clause for exception %s.\n", p); |
| 1855 | #if 0 |
| 1856 | win: |
| 1857 | #endif |
| 1858 | p = p1; |
| 1859 | while (*p == ' ' || *p == '\t') p++; |
| 1860 | } |
| 1861 | } |
| 1862 | #endif /* 0 */ |
| 1863 | |
| 1864 | /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ |
| 1865 | |
| 1866 | static struct symtabs_and_lines |
| 1867 | get_catch_sals (this_level_only) |
| 1868 | int this_level_only; |
| 1869 | { |
| 1870 | register struct blockvector *bl; |
| 1871 | register struct block *block; |
| 1872 | int index, have_default = 0; |
| 1873 | struct frame_info *fi; |
| 1874 | CORE_ADDR pc; |
| 1875 | struct symtabs_and_lines sals; |
| 1876 | struct sal_chain *sal_chain = 0; |
| 1877 | char *blocks_searched; |
| 1878 | |
| 1879 | /* Not sure whether an error message is always the correct response, |
| 1880 | but it's better than a core dump. */ |
| 1881 | if (selected_frame == NULL) |
| 1882 | error ("No selected frame."); |
| 1883 | block = get_frame_block (selected_frame); |
| 1884 | fi = get_frame_info (selected_frame); |
| 1885 | pc = fi->pc; |
| 1886 | |
| 1887 | sals.nelts = 0; |
| 1888 | sals.sals = NULL; |
| 1889 | |
| 1890 | if (block == 0) |
| 1891 | error ("No symbol table info available.\n"); |
| 1892 | |
| 1893 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); |
| 1894 | blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| 1895 | memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| 1896 | |
| 1897 | while (block != 0) |
| 1898 | { |
| 1899 | CORE_ADDR end = BLOCK_END (block) - 4; |
| 1900 | int last_index; |
| 1901 | |
| 1902 | if (bl != blockvector_for_pc (end, &index)) |
| 1903 | error ("blockvector blotch"); |
| 1904 | if (BLOCKVECTOR_BLOCK (bl, index) != block) |
| 1905 | error ("blockvector botch"); |
| 1906 | last_index = BLOCKVECTOR_NBLOCKS (bl); |
| 1907 | index += 1; |
| 1908 | |
| 1909 | /* Don't print out blocks that have gone by. */ |
| 1910 | while (index < last_index |
| 1911 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) |
| 1912 | index++; |
| 1913 | |
| 1914 | while (index < last_index |
| 1915 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) |
| 1916 | { |
| 1917 | if (blocks_searched[index] == 0) |
| 1918 | { |
| 1919 | struct block *b = BLOCKVECTOR_BLOCK (bl, index); |
| 1920 | int nsyms; |
| 1921 | register int i; |
| 1922 | register struct symbol *sym; |
| 1923 | |
| 1924 | nsyms = BLOCK_NSYMS (b); |
| 1925 | |
| 1926 | for (i = 0; i < nsyms; i++) |
| 1927 | { |
| 1928 | sym = BLOCK_SYM (b, i); |
| 1929 | if (STREQ (SYMBOL_NAME (sym), "default")) |
| 1930 | { |
| 1931 | if (have_default) |
| 1932 | continue; |
| 1933 | have_default = 1; |
| 1934 | } |
| 1935 | if (SYMBOL_CLASS (sym) == LOC_LABEL) |
| 1936 | { |
| 1937 | struct sal_chain *next = (struct sal_chain *) |
| 1938 | alloca (sizeof (struct sal_chain)); |
| 1939 | next->next = sal_chain; |
| 1940 | next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); |
| 1941 | sal_chain = next; |
| 1942 | } |
| 1943 | } |
| 1944 | blocks_searched[index] = 1; |
| 1945 | } |
| 1946 | index++; |
| 1947 | } |
| 1948 | if (have_default) |
| 1949 | break; |
| 1950 | if (sal_chain && this_level_only) |
| 1951 | break; |
| 1952 | |
| 1953 | /* After handling the function's top-level block, stop. |
| 1954 | Don't continue to its superblock, the block of |
| 1955 | per-file symbols. */ |
| 1956 | if (BLOCK_FUNCTION (block)) |
| 1957 | break; |
| 1958 | block = BLOCK_SUPERBLOCK (block); |
| 1959 | } |
| 1960 | |
| 1961 | if (sal_chain) |
| 1962 | { |
| 1963 | struct sal_chain *tmp_chain; |
| 1964 | |
| 1965 | /* Count the number of entries. */ |
| 1966 | for (index = 0, tmp_chain = sal_chain; tmp_chain; |
| 1967 | tmp_chain = tmp_chain->next) |
| 1968 | index++; |
| 1969 | |
| 1970 | sals.nelts = index; |
| 1971 | sals.sals = (struct symtab_and_line *) |
| 1972 | xmalloc (index * sizeof (struct symtab_and_line)); |
| 1973 | for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) |
| 1974 | sals.sals[index] = sal_chain->sal; |
| 1975 | } |
| 1976 | |
| 1977 | return sals; |
| 1978 | } |
| 1979 | |
| 1980 | /* Commands to deal with catching exceptions. */ |
| 1981 | |
| 1982 | static void |
| 1983 | catch_command_1 (arg, tempflag, from_tty) |
| 1984 | char *arg; |
| 1985 | int tempflag; |
| 1986 | int from_tty; |
| 1987 | { |
| 1988 | /* First, translate ARG into something we can deal with in terms |
| 1989 | of breakpoints. */ |
| 1990 | |
| 1991 | struct symtabs_and_lines sals; |
| 1992 | struct symtab_and_line sal; |
| 1993 | register struct expression *cond = 0; |
| 1994 | register struct breakpoint *b; |
| 1995 | char *save_arg; |
| 1996 | int i; |
| 1997 | |
| 1998 | sal.line = sal.pc = sal.end = 0; |
| 1999 | sal.symtab = 0; |
| 2000 | |
| 2001 | /* If no arg given, or if first arg is 'if ', all active catch clauses |
| 2002 | are breakpointed. */ |
| 2003 | |
| 2004 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' |
| 2005 | && (arg[2] == ' ' || arg[2] == '\t'))) |
| 2006 | { |
| 2007 | /* Grab all active catch clauses. */ |
| 2008 | sals = get_catch_sals (0); |
| 2009 | } |
| 2010 | else |
| 2011 | { |
| 2012 | /* Grab selected catch clauses. */ |
| 2013 | error ("catch NAME not implemeneted"); |
| 2014 | #if 0 |
| 2015 | /* This isn't used; I don't know what it was for. */ |
| 2016 | sals = map_catch_names (arg, catch_breakpoint); |
| 2017 | #endif |
| 2018 | } |
| 2019 | |
| 2020 | if (! sals.nelts) |
| 2021 | return; |
| 2022 | |
| 2023 | save_arg = arg; |
| 2024 | for (i = 0; i < sals.nelts; i++) |
| 2025 | { |
| 2026 | resolve_sal_pc (&sals.sals[i]); |
| 2027 | |
| 2028 | while (arg && *arg) |
| 2029 | { |
| 2030 | if (arg[0] == 'i' && arg[1] == 'f' |
| 2031 | && (arg[2] == ' ' || arg[2] == '\t')) |
| 2032 | cond = parse_exp_1 ((arg += 2, &arg), |
| 2033 | block_for_pc (sals.sals[i].pc), 0); |
| 2034 | else |
| 2035 | error ("Junk at end of arguments."); |
| 2036 | } |
| 2037 | arg = save_arg; |
| 2038 | } |
| 2039 | |
| 2040 | for (i = 0; i < sals.nelts; i++) |
| 2041 | { |
| 2042 | sal = sals.sals[i]; |
| 2043 | |
| 2044 | if (from_tty) |
| 2045 | describe_other_breakpoints (sal.pc); |
| 2046 | |
| 2047 | b = set_raw_breakpoint (sal); |
| 2048 | set_breakpoint_count (breakpoint_count + 1); |
| 2049 | b->number = breakpoint_count; |
| 2050 | b->type = bp_breakpoint; |
| 2051 | b->cond = cond; |
| 2052 | b->enable = enabled; |
| 2053 | b->disposition = tempflag ? delete : donttouch; |
| 2054 | |
| 2055 | printf ("Breakpoint %d at %s", b->number, local_hex_string(b->address)); |
| 2056 | if (b->symtab) |
| 2057 | printf (": file %s, line %d.", b->symtab->filename, b->line_number); |
| 2058 | printf ("\n"); |
| 2059 | } |
| 2060 | |
| 2061 | if (sals.nelts > 1) |
| 2062 | { |
| 2063 | printf ("Multiple breakpoints were set.\n"); |
| 2064 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); |
| 2065 | } |
| 2066 | free ((PTR)sals.sals); |
| 2067 | } |
| 2068 | |
| 2069 | #if 0 |
| 2070 | /* These aren't used; I don't know what they were for. */ |
| 2071 | /* Disable breakpoints on all catch clauses described in ARGS. */ |
| 2072 | static void |
| 2073 | disable_catch (args) |
| 2074 | char *args; |
| 2075 | { |
| 2076 | /* Map the disable command to catch clauses described in ARGS. */ |
| 2077 | } |
| 2078 | |
| 2079 | /* Enable breakpoints on all catch clauses described in ARGS. */ |
| 2080 | static void |
| 2081 | enable_catch (args) |
| 2082 | char *args; |
| 2083 | { |
| 2084 | /* Map the disable command to catch clauses described in ARGS. */ |
| 2085 | } |
| 2086 | |
| 2087 | /* Delete breakpoints on all catch clauses in the active scope. */ |
| 2088 | static void |
| 2089 | delete_catch (args) |
| 2090 | char *args; |
| 2091 | { |
| 2092 | /* Map the delete command to catch clauses described in ARGS. */ |
| 2093 | } |
| 2094 | #endif /* 0 */ |
| 2095 | |
| 2096 | static void |
| 2097 | catch_command (arg, from_tty) |
| 2098 | char *arg; |
| 2099 | int from_tty; |
| 2100 | { |
| 2101 | catch_command_1 (arg, 0, from_tty); |
| 2102 | } |
| 2103 | \f |
| 2104 | static void |
| 2105 | clear_command (arg, from_tty) |
| 2106 | char *arg; |
| 2107 | int from_tty; |
| 2108 | { |
| 2109 | register struct breakpoint *b, *b1; |
| 2110 | struct symtabs_and_lines sals; |
| 2111 | struct symtab_and_line sal; |
| 2112 | register struct breakpoint *found; |
| 2113 | int i; |
| 2114 | |
| 2115 | if (arg) |
| 2116 | { |
| 2117 | sals = decode_line_spec (arg, 1); |
| 2118 | } |
| 2119 | else |
| 2120 | { |
| 2121 | sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); |
| 2122 | sal.line = default_breakpoint_line; |
| 2123 | sal.symtab = default_breakpoint_symtab; |
| 2124 | sal.pc = 0; |
| 2125 | if (sal.symtab == 0) |
| 2126 | error ("No source file specified."); |
| 2127 | |
| 2128 | sals.sals[0] = sal; |
| 2129 | sals.nelts = 1; |
| 2130 | } |
| 2131 | |
| 2132 | for (i = 0; i < sals.nelts; i++) |
| 2133 | { |
| 2134 | /* If exact pc given, clear bpts at that pc. |
| 2135 | But if sal.pc is zero, clear all bpts on specified line. */ |
| 2136 | sal = sals.sals[i]; |
| 2137 | found = (struct breakpoint *) 0; |
| 2138 | while (breakpoint_chain |
| 2139 | && (sal.pc ? breakpoint_chain->address == sal.pc |
| 2140 | : (breakpoint_chain->symtab == sal.symtab |
| 2141 | && breakpoint_chain->line_number == sal.line))) |
| 2142 | { |
| 2143 | b1 = breakpoint_chain; |
| 2144 | breakpoint_chain = b1->next; |
| 2145 | b1->next = found; |
| 2146 | found = b1; |
| 2147 | } |
| 2148 | |
| 2149 | ALL_BREAKPOINTS (b) |
| 2150 | while (b->next |
| 2151 | && b->next->type != bp_watchpoint |
| 2152 | && (sal.pc ? b->next->address == sal.pc |
| 2153 | : (b->next->symtab == sal.symtab |
| 2154 | && b->next->line_number == sal.line))) |
| 2155 | { |
| 2156 | b1 = b->next; |
| 2157 | b->next = b1->next; |
| 2158 | b1->next = found; |
| 2159 | found = b1; |
| 2160 | } |
| 2161 | |
| 2162 | if (found == 0) |
| 2163 | { |
| 2164 | if (arg) |
| 2165 | error ("No breakpoint at %s.", arg); |
| 2166 | else |
| 2167 | error ("No breakpoint at this line."); |
| 2168 | } |
| 2169 | |
| 2170 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ |
| 2171 | if (from_tty) printf ("Deleted breakpoint%s ", found->next ? "s" : ""); |
| 2172 | while (found) |
| 2173 | { |
| 2174 | if (from_tty) printf ("%d ", found->number); |
| 2175 | b1 = found->next; |
| 2176 | delete_breakpoint (found); |
| 2177 | found = b1; |
| 2178 | } |
| 2179 | if (from_tty) putchar ('\n'); |
| 2180 | } |
| 2181 | free ((PTR)sals.sals); |
| 2182 | } |
| 2183 | \f |
| 2184 | /* Delete breakpoint in BS if they are `delete' breakpoints. |
| 2185 | This is called after any breakpoint is hit, or after errors. */ |
| 2186 | |
| 2187 | void |
| 2188 | breakpoint_auto_delete (bs) |
| 2189 | bpstat bs; |
| 2190 | { |
| 2191 | for (; bs; bs = bs->next) |
| 2192 | if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete) |
| 2193 | delete_breakpoint (bs->breakpoint_at); |
| 2194 | } |
| 2195 | |
| 2196 | /* Delete a breakpoint and clean up all traces of it in the data structures. */ |
| 2197 | |
| 2198 | void |
| 2199 | delete_breakpoint (bpt) |
| 2200 | struct breakpoint *bpt; |
| 2201 | { |
| 2202 | register struct breakpoint *b; |
| 2203 | register bpstat bs; |
| 2204 | |
| 2205 | if (bpt->inserted) |
| 2206 | target_remove_breakpoint(bpt->address, bpt->shadow_contents); |
| 2207 | |
| 2208 | if (breakpoint_chain == bpt) |
| 2209 | breakpoint_chain = bpt->next; |
| 2210 | |
| 2211 | ALL_BREAKPOINTS (b) |
| 2212 | if (b->next == bpt) |
| 2213 | { |
| 2214 | b->next = bpt->next; |
| 2215 | break; |
| 2216 | } |
| 2217 | |
| 2218 | check_duplicates (bpt->address); |
| 2219 | |
| 2220 | free_command_lines (&bpt->commands); |
| 2221 | if (bpt->cond) |
| 2222 | free ((PTR)bpt->cond); |
| 2223 | if (bpt->cond_string != NULL) |
| 2224 | free ((PTR)bpt->cond_string); |
| 2225 | if (bpt->addr_string != NULL) |
| 2226 | free ((PTR)bpt->addr_string); |
| 2227 | if (bpt->exp_string != NULL) |
| 2228 | free ((PTR)bpt->exp_string); |
| 2229 | |
| 2230 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
| 2231 | printf ("breakpoint #%d deleted\n", bpt->number); |
| 2232 | |
| 2233 | /* Be sure no bpstat's are pointing at it after it's been freed. */ |
| 2234 | /* FIXME, how can we find all bpstat's? We just check stop_bpstat for now. */ |
| 2235 | for (bs = stop_bpstat; bs; bs = bs->next) |
| 2236 | if (bs->breakpoint_at == bpt) |
| 2237 | bs->breakpoint_at = NULL; |
| 2238 | free ((PTR)bpt); |
| 2239 | } |
| 2240 | |
| 2241 | static void |
| 2242 | delete_command (arg, from_tty) |
| 2243 | char *arg; |
| 2244 | int from_tty; |
| 2245 | { |
| 2246 | |
| 2247 | if (arg == 0) |
| 2248 | { |
| 2249 | /* Ask user only if there are some breakpoints to delete. */ |
| 2250 | if (!from_tty |
| 2251 | || (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0))) |
| 2252 | { |
| 2253 | /* No arg; clear all breakpoints. */ |
| 2254 | while (breakpoint_chain) |
| 2255 | delete_breakpoint (breakpoint_chain); |
| 2256 | } |
| 2257 | } |
| 2258 | else |
| 2259 | map_breakpoint_numbers (arg, delete_breakpoint); |
| 2260 | } |
| 2261 | |
| 2262 | /* Reset a breakpoint given it's struct breakpoint * BINT. |
| 2263 | The value we return ends up being the return value from catch_errors. |
| 2264 | Unused in this case. */ |
| 2265 | |
| 2266 | static int |
| 2267 | breakpoint_re_set_one (bint) |
| 2268 | char *bint; |
| 2269 | { |
| 2270 | struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ |
| 2271 | int i; |
| 2272 | struct symtabs_and_lines sals; |
| 2273 | char *s; |
| 2274 | enum enable save_enable; |
| 2275 | |
| 2276 | switch (b->type) |
| 2277 | { |
| 2278 | case bp_breakpoint: |
| 2279 | if (b->addr_string == NULL) |
| 2280 | { |
| 2281 | /* Anything without a string can't be re-set. */ |
| 2282 | delete_breakpoint (b); |
| 2283 | return 0; |
| 2284 | } |
| 2285 | /* In case we have a problem, disable this breakpoint. We'll restore |
| 2286 | its status if we succeed. */ |
| 2287 | save_enable = b->enable; |
| 2288 | b->enable = disabled; |
| 2289 | |
| 2290 | s = b->addr_string; |
| 2291 | sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0); |
| 2292 | for (i = 0; i < sals.nelts; i++) |
| 2293 | { |
| 2294 | resolve_sal_pc (&sals.sals[i]); |
| 2295 | if (b->symtab != sals.sals[i].symtab |
| 2296 | || b->line_number != sals.sals[i].line |
| 2297 | || b->address != sals.sals[i].pc) |
| 2298 | { |
| 2299 | b->symtab = sals.sals[i].symtab; |
| 2300 | b->line_number = sals.sals[i].line; |
| 2301 | b->address = sals.sals[i].pc; |
| 2302 | |
| 2303 | if (b->cond_string != NULL) |
| 2304 | { |
| 2305 | s = b->cond_string; |
| 2306 | if (b->cond) |
| 2307 | free ((PTR)b->cond); |
| 2308 | b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); |
| 2309 | } |
| 2310 | |
| 2311 | check_duplicates (b->address); |
| 2312 | |
| 2313 | mention (b); |
| 2314 | } |
| 2315 | b->enable = save_enable; /* Restore it, this worked. */ |
| 2316 | } |
| 2317 | free ((PTR)sals.sals); |
| 2318 | break; |
| 2319 | |
| 2320 | case bp_watchpoint: |
| 2321 | innermost_block = NULL; |
| 2322 | /* The issue arises of what context to evaluate this in. The same |
| 2323 | one as when it was set, but what does that mean when symbols have |
| 2324 | been re-read? We could save the filename and functionname, but |
| 2325 | if the context is more local than that, the best we could do would |
| 2326 | be something like how many levels deep and which index at that |
| 2327 | particular level, but that's going to be less stable than filenames |
| 2328 | or functionnames. */ |
| 2329 | /* So for now, just use a global context. */ |
| 2330 | b->exp = parse_expression (b->exp_string); |
| 2331 | b->exp_valid_block = innermost_block; |
| 2332 | b->val = evaluate_expression (b->exp); |
| 2333 | release_value (b->val); |
| 2334 | if (VALUE_LAZY (b->val)) |
| 2335 | value_fetch_lazy (b->val); |
| 2336 | |
| 2337 | if (b->cond_string != NULL) |
| 2338 | { |
| 2339 | s = b->cond_string; |
| 2340 | b->cond = parse_exp_1 (&s, (struct block *)0, 0); |
| 2341 | } |
| 2342 | mention (b); |
| 2343 | break; |
| 2344 | |
| 2345 | default: |
| 2346 | printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); |
| 2347 | /* fall through */ |
| 2348 | case bp_until: |
| 2349 | case bp_finish: |
| 2350 | case bp_longjmp: |
| 2351 | case bp_longjmp_resume: |
| 2352 | delete_breakpoint (b); |
| 2353 | break; |
| 2354 | } |
| 2355 | |
| 2356 | return 0; |
| 2357 | } |
| 2358 | |
| 2359 | /* Re-set all breakpoints after symbols have been re-loaded. */ |
| 2360 | void |
| 2361 | breakpoint_re_set () |
| 2362 | { |
| 2363 | struct breakpoint *b, *temp; |
| 2364 | static char message1[] = "Error in re-setting breakpoint %d:\n"; |
| 2365 | char message[sizeof (message1) + 30 /* slop */]; |
| 2366 | |
| 2367 | /* If we have no current source symtab, and we have any breakpoints, |
| 2368 | go through the work of making a source context. */ |
| 2369 | if (current_source_symtab == NULL && breakpoint_chain != 0) |
| 2370 | { |
| 2371 | select_source_symtab (NULL); |
| 2372 | } |
| 2373 | |
| 2374 | ALL_BREAKPOINTS_SAFE (b, temp) |
| 2375 | { |
| 2376 | sprintf (message, message1, b->number); /* Format possible error msg */ |
| 2377 | catch_errors (breakpoint_re_set_one, (char *) b, message); |
| 2378 | } |
| 2379 | |
| 2380 | create_longjmp_breakpoint("longjmp"); |
| 2381 | create_longjmp_breakpoint("_longjmp"); |
| 2382 | create_longjmp_breakpoint("siglongjmp"); |
| 2383 | create_longjmp_breakpoint(NULL); |
| 2384 | |
| 2385 | #if 0 |
| 2386 | /* Took this out (temporaliy at least), since it produces an extra |
| 2387 | blank line at startup. This messes up the gdbtests. -PB */ |
| 2388 | /* Blank line to finish off all those mention() messages we just printed. */ |
| 2389 | printf_filtered ("\n"); |
| 2390 | #endif |
| 2391 | } |
| 2392 | \f |
| 2393 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| 2394 | If from_tty is nonzero, it prints a message to that effect, |
| 2395 | which ends with a period (no newline). */ |
| 2396 | |
| 2397 | void |
| 2398 | set_ignore_count (bptnum, count, from_tty) |
| 2399 | int bptnum, count, from_tty; |
| 2400 | { |
| 2401 | register struct breakpoint *b; |
| 2402 | |
| 2403 | if (count < 0) |
| 2404 | count = 0; |
| 2405 | |
| 2406 | ALL_BREAKPOINTS (b) |
| 2407 | if (b->number == bptnum) |
| 2408 | { |
| 2409 | b->ignore_count = count; |
| 2410 | if (!from_tty) |
| 2411 | return; |
| 2412 | else if (count == 0) |
| 2413 | printf_filtered ("Will stop next time breakpoint %d is reached.", |
| 2414 | bptnum); |
| 2415 | else if (count == 1) |
| 2416 | printf_filtered ("Will ignore next crossing of breakpoint %d.", |
| 2417 | bptnum); |
| 2418 | else |
| 2419 | printf_filtered ("Will ignore next %d crossings of breakpoint %d.", |
| 2420 | count, bptnum); |
| 2421 | return; |
| 2422 | } |
| 2423 | |
| 2424 | error ("No breakpoint number %d.", bptnum); |
| 2425 | } |
| 2426 | |
| 2427 | /* Clear the ignore counts of all breakpoints. */ |
| 2428 | void |
| 2429 | breakpoint_clear_ignore_counts () |
| 2430 | { |
| 2431 | struct breakpoint *b; |
| 2432 | |
| 2433 | ALL_BREAKPOINTS (b) |
| 2434 | b->ignore_count = 0; |
| 2435 | } |
| 2436 | |
| 2437 | /* Command to set ignore-count of breakpoint N to COUNT. */ |
| 2438 | |
| 2439 | static void |
| 2440 | ignore_command (args, from_tty) |
| 2441 | char *args; |
| 2442 | int from_tty; |
| 2443 | { |
| 2444 | char *p = args; |
| 2445 | register int num; |
| 2446 | |
| 2447 | if (p == 0) |
| 2448 | error_no_arg ("a breakpoint number"); |
| 2449 | |
| 2450 | num = get_number (&p); |
| 2451 | |
| 2452 | if (*p == 0) |
| 2453 | error ("Second argument (specified ignore-count) is missing."); |
| 2454 | |
| 2455 | set_ignore_count (num, |
| 2456 | longest_to_int (value_as_long (parse_and_eval (p))), |
| 2457 | from_tty); |
| 2458 | printf_filtered ("\n"); |
| 2459 | } |
| 2460 | \f |
| 2461 | /* Call FUNCTION on each of the breakpoints |
| 2462 | whose numbers are given in ARGS. */ |
| 2463 | |
| 2464 | static void |
| 2465 | map_breakpoint_numbers (args, function) |
| 2466 | char *args; |
| 2467 | void (*function) PARAMS ((struct breakpoint *)); |
| 2468 | { |
| 2469 | register char *p = args; |
| 2470 | char *p1; |
| 2471 | register int num; |
| 2472 | register struct breakpoint *b; |
| 2473 | |
| 2474 | if (p == 0) |
| 2475 | error_no_arg ("one or more breakpoint numbers"); |
| 2476 | |
| 2477 | while (*p) |
| 2478 | { |
| 2479 | p1 = p; |
| 2480 | |
| 2481 | num = get_number (&p1); |
| 2482 | |
| 2483 | ALL_BREAKPOINTS (b) |
| 2484 | if (b->number == num) |
| 2485 | { |
| 2486 | function (b); |
| 2487 | goto win; |
| 2488 | } |
| 2489 | printf ("No breakpoint number %d.\n", num); |
| 2490 | win: |
| 2491 | p = p1; |
| 2492 | } |
| 2493 | } |
| 2494 | |
| 2495 | static void |
| 2496 | enable_breakpoint (bpt) |
| 2497 | struct breakpoint *bpt; |
| 2498 | { |
| 2499 | bpt->enable = enabled; |
| 2500 | |
| 2501 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
| 2502 | printf ("breakpoint #%d enabled\n", bpt->number); |
| 2503 | |
| 2504 | check_duplicates (bpt->address); |
| 2505 | if (bpt->type == bp_watchpoint) |
| 2506 | { |
| 2507 | if (bpt->exp_valid_block != NULL |
| 2508 | && !contained_in (get_selected_block (), bpt->exp_valid_block)) |
| 2509 | { |
| 2510 | printf_filtered ("\ |
| 2511 | Cannot enable watchpoint %d because the block in which its expression\n\ |
| 2512 | is valid is not currently in scope.\n", bpt->number); |
| 2513 | bpt->enable = disabled; |
| 2514 | return; |
| 2515 | } |
| 2516 | |
| 2517 | value_free (bpt->val); |
| 2518 | |
| 2519 | bpt->val = evaluate_expression (bpt->exp); |
| 2520 | release_value (bpt->val); |
| 2521 | if (VALUE_LAZY (bpt->val)) |
| 2522 | value_fetch_lazy (bpt->val); |
| 2523 | } |
| 2524 | } |
| 2525 | |
| 2526 | /* ARGSUSED */ |
| 2527 | static void |
| 2528 | enable_command (args, from_tty) |
| 2529 | char *args; |
| 2530 | int from_tty; |
| 2531 | { |
| 2532 | struct breakpoint *bpt; |
| 2533 | if (args == 0) |
| 2534 | ALL_BREAKPOINTS (bpt) |
| 2535 | switch (bpt->type) |
| 2536 | { |
| 2537 | case bp_breakpoint: |
| 2538 | case bp_watchpoint: |
| 2539 | enable_breakpoint (bpt); |
| 2540 | default: |
| 2541 | continue; |
| 2542 | } |
| 2543 | else |
| 2544 | map_breakpoint_numbers (args, enable_breakpoint); |
| 2545 | } |
| 2546 | |
| 2547 | static void |
| 2548 | disable_breakpoint (bpt) |
| 2549 | struct breakpoint *bpt; |
| 2550 | { |
| 2551 | bpt->enable = disabled; |
| 2552 | |
| 2553 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
| 2554 | printf_filtered ("breakpoint #%d disabled\n", bpt->number); |
| 2555 | |
| 2556 | check_duplicates (bpt->address); |
| 2557 | } |
| 2558 | |
| 2559 | /* ARGSUSED */ |
| 2560 | static void |
| 2561 | disable_command (args, from_tty) |
| 2562 | char *args; |
| 2563 | int from_tty; |
| 2564 | { |
| 2565 | register struct breakpoint *bpt; |
| 2566 | if (args == 0) |
| 2567 | ALL_BREAKPOINTS (bpt) |
| 2568 | switch (bpt->type) |
| 2569 | { |
| 2570 | case bp_breakpoint: |
| 2571 | case bp_watchpoint: |
| 2572 | disable_breakpoint (bpt); |
| 2573 | default: |
| 2574 | continue; |
| 2575 | } |
| 2576 | else |
| 2577 | map_breakpoint_numbers (args, disable_breakpoint); |
| 2578 | } |
| 2579 | |
| 2580 | static void |
| 2581 | enable_once_breakpoint (bpt) |
| 2582 | struct breakpoint *bpt; |
| 2583 | { |
| 2584 | bpt->enable = enabled; |
| 2585 | bpt->disposition = disable; |
| 2586 | |
| 2587 | check_duplicates (bpt->address); |
| 2588 | } |
| 2589 | |
| 2590 | /* ARGSUSED */ |
| 2591 | static void |
| 2592 | enable_once_command (args, from_tty) |
| 2593 | char *args; |
| 2594 | int from_tty; |
| 2595 | { |
| 2596 | map_breakpoint_numbers (args, enable_once_breakpoint); |
| 2597 | } |
| 2598 | |
| 2599 | static void |
| 2600 | enable_delete_breakpoint (bpt) |
| 2601 | struct breakpoint *bpt; |
| 2602 | { |
| 2603 | bpt->enable = enabled; |
| 2604 | bpt->disposition = delete; |
| 2605 | |
| 2606 | check_duplicates (bpt->address); |
| 2607 | } |
| 2608 | |
| 2609 | /* ARGSUSED */ |
| 2610 | static void |
| 2611 | enable_delete_command (args, from_tty) |
| 2612 | char *args; |
| 2613 | int from_tty; |
| 2614 | { |
| 2615 | map_breakpoint_numbers (args, enable_delete_breakpoint); |
| 2616 | } |
| 2617 | \f |
| 2618 | /* |
| 2619 | * Use default_breakpoint_'s, or nothing if they aren't valid. |
| 2620 | */ |
| 2621 | struct symtabs_and_lines |
| 2622 | decode_line_spec_1 (string, funfirstline) |
| 2623 | char *string; |
| 2624 | int funfirstline; |
| 2625 | { |
| 2626 | struct symtabs_and_lines sals; |
| 2627 | if (string == 0) |
| 2628 | error ("Empty line specification."); |
| 2629 | if (default_breakpoint_valid) |
| 2630 | sals = decode_line_1 (&string, funfirstline, |
| 2631 | default_breakpoint_symtab, default_breakpoint_line); |
| 2632 | else |
| 2633 | sals = decode_line_1 (&string, funfirstline, (struct symtab *)NULL, 0); |
| 2634 | if (*string) |
| 2635 | error ("Junk at end of line specification: %s", string); |
| 2636 | return sals; |
| 2637 | } |
| 2638 | \f |
| 2639 | void |
| 2640 | _initialize_breakpoint () |
| 2641 | { |
| 2642 | breakpoint_chain = 0; |
| 2643 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful |
| 2644 | before a breakpoint is set. */ |
| 2645 | breakpoint_count = 0; |
| 2646 | |
| 2647 | add_com ("ignore", class_breakpoint, ignore_command, |
| 2648 | "Set ignore-count of breakpoint number N to COUNT."); |
| 2649 | |
| 2650 | add_com ("commands", class_breakpoint, commands_command, |
| 2651 | "Set commands to be executed when a breakpoint is hit.\n\ |
| 2652 | Give breakpoint number as argument after \"commands\".\n\ |
| 2653 | With no argument, the targeted breakpoint is the last one set.\n\ |
| 2654 | The commands themselves follow starting on the next line.\n\ |
| 2655 | Type a line containing \"end\" to indicate the end of them.\n\ |
| 2656 | Give \"silent\" as the first line to make the breakpoint silent;\n\ |
| 2657 | then no output is printed when it is hit, except what the commands print."); |
| 2658 | |
| 2659 | add_com ("condition", class_breakpoint, condition_command, |
| 2660 | "Specify breakpoint number N to break only if COND is true.\n\ |
| 2661 | N is an integer; COND is an expression to be evaluated whenever\n\ |
| 2662 | breakpoint N is reached. "); |
| 2663 | |
| 2664 | add_com ("tbreak", class_breakpoint, tbreak_command, |
| 2665 | "Set a temporary breakpoint. Args like \"break\" command.\n\ |
| 2666 | Like \"break\" except the breakpoint is only enabled temporarily,\n\ |
| 2667 | so it will be disabled when hit. Equivalent to \"break\" followed\n\ |
| 2668 | by using \"enable once\" on the breakpoint number."); |
| 2669 | |
| 2670 | add_prefix_cmd ("enable", class_breakpoint, enable_command, |
| 2671 | "Enable some breakpoints.\n\ |
| 2672 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 2673 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| 2674 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 2675 | With a subcommand you can enable temporarily.", |
| 2676 | &enablelist, "enable ", 1, &cmdlist); |
| 2677 | |
| 2678 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, |
| 2679 | "Enable some breakpoints.\n\ |
| 2680 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 2681 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 2682 | May be abbreviated to simply \"enable\".\n", |
| 2683 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); |
| 2684 | |
| 2685 | add_cmd ("once", no_class, enable_once_command, |
| 2686 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| 2687 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ |
| 2688 | See the \"tbreak\" command which sets a breakpoint and enables it once.", |
| 2689 | &enablebreaklist); |
| 2690 | |
| 2691 | add_cmd ("delete", no_class, enable_delete_command, |
| 2692 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| 2693 | If a breakpoint is hit while enabled in this fashion, it is deleted.", |
| 2694 | &enablebreaklist); |
| 2695 | |
| 2696 | add_cmd ("delete", no_class, enable_delete_command, |
| 2697 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| 2698 | If a breakpoint is hit while enabled in this fashion, it is deleted.", |
| 2699 | &enablelist); |
| 2700 | |
| 2701 | add_cmd ("once", no_class, enable_once_command, |
| 2702 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| 2703 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ |
| 2704 | See the \"tbreak\" command which sets a breakpoint and enables it once.", |
| 2705 | &enablelist); |
| 2706 | |
| 2707 | add_prefix_cmd ("disable", class_breakpoint, disable_command, |
| 2708 | "Disable some breakpoints.\n\ |
| 2709 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 2710 | To disable all breakpoints, give no argument.\n\ |
| 2711 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", |
| 2712 | &disablelist, "disable ", 1, &cmdlist); |
| 2713 | add_com_alias ("dis", "disable", class_breakpoint, 1); |
| 2714 | add_com_alias ("disa", "disable", class_breakpoint, 1); |
| 2715 | |
| 2716 | add_cmd ("breakpoints", class_alias, disable_command, |
| 2717 | "Disable some breakpoints.\n\ |
| 2718 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 2719 | To disable all breakpoints, give no argument.\n\ |
| 2720 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ |
| 2721 | This command may be abbreviated \"disable\".", |
| 2722 | &disablelist); |
| 2723 | |
| 2724 | add_prefix_cmd ("delete", class_breakpoint, delete_command, |
| 2725 | "Delete some breakpoints or auto-display expressions.\n\ |
| 2726 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 2727 | To delete all breakpoints, give no argument.\n\ |
| 2728 | \n\ |
| 2729 | Also a prefix command for deletion of other GDB objects.\n\ |
| 2730 | The \"unset\" command is also an alias for \"delete\".", |
| 2731 | &deletelist, "delete ", 1, &cmdlist); |
| 2732 | add_com_alias ("d", "delete", class_breakpoint, 1); |
| 2733 | |
| 2734 | add_cmd ("breakpoints", class_alias, delete_command, |
| 2735 | "Delete some breakpoints or auto-display expressions.\n\ |
| 2736 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 2737 | To delete all breakpoints, give no argument.\n\ |
| 2738 | This command may be abbreviated \"delete\".", |
| 2739 | &deletelist); |
| 2740 | |
| 2741 | add_com ("clear", class_breakpoint, clear_command, |
| 2742 | "Clear breakpoint at specified line or function.\n\ |
| 2743 | Argument may be line number, function name, or \"*\" and an address.\n\ |
| 2744 | If line number is specified, all breakpoints in that line are cleared.\n\ |
| 2745 | If function is specified, breakpoints at beginning of function are cleared.\n\ |
| 2746 | If an address is specified, breakpoints at that address are cleared.\n\n\ |
| 2747 | With no argument, clears all breakpoints in the line that the selected frame\n\ |
| 2748 | is executing in.\n\ |
| 2749 | \n\ |
| 2750 | See also the \"delete\" command which clears breakpoints by number."); |
| 2751 | |
| 2752 | add_com ("break", class_breakpoint, break_command, |
| 2753 | "Set breakpoint at specified line or function.\n\ |
| 2754 | Argument may be line number, function name, or \"*\" and an address.\n\ |
| 2755 | If line number is specified, break at start of code for that line.\n\ |
| 2756 | If function is specified, break at start of code for that function.\n\ |
| 2757 | If an address is specified, break at that exact address.\n\ |
| 2758 | With no arg, uses current execution address of selected stack frame.\n\ |
| 2759 | This is useful for breaking on return to a stack frame.\n\ |
| 2760 | \n\ |
| 2761 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ |
| 2762 | \n\ |
| 2763 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); |
| 2764 | add_com_alias ("b", "break", class_run, 1); |
| 2765 | add_com_alias ("br", "break", class_run, 1); |
| 2766 | add_com_alias ("bre", "break", class_run, 1); |
| 2767 | add_com_alias ("brea", "break", class_run, 1); |
| 2768 | |
| 2769 | add_info ("breakpoints", breakpoints_info, |
| 2770 | "Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| 2771 | The \"Type\" column indicates one of:\n\ |
| 2772 | \tbreakpoint - normal breakpoint\n\ |
| 2773 | \twatchpoint - watchpoint\n\ |
| 2774 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| 2775 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| 2776 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| 2777 | address and file/line number respectively.\n\n\ |
| 2778 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 2779 | are set to the address of the last breakpoint listed.\n\n\ |
| 2780 | Convenience variable \"$bpnum\" contains the number of the last\n\ |
| 2781 | breakpoint set."); |
| 2782 | |
| 2783 | #if MAINTENANCE_CMDS |
| 2784 | |
| 2785 | add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, |
| 2786 | "Status of all breakpoints, or breakpoint number NUMBER.\n\ |
| 2787 | The \"Type\" column indicates one of:\n\ |
| 2788 | \tbreakpoint - normal breakpoint\n\ |
| 2789 | \twatchpoint - watchpoint\n\ |
| 2790 | \tlongjmp - internal breakpoint used to step through longjmp()\n\ |
| 2791 | \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ |
| 2792 | \tuntil - internal breakpoint used by the \"until\" command\n\ |
| 2793 | \tfinish - internal breakpoint used by the \"finish\" command\n\ |
| 2794 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| 2795 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| 2796 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| 2797 | address and file/line number respectively.\n\n\ |
| 2798 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 2799 | are set to the address of the last breakpoint listed.\n\n\ |
| 2800 | Convenience variable \"$bpnum\" contains the number of the last\n\ |
| 2801 | breakpoint set.", |
| 2802 | &maintenanceinfolist); |
| 2803 | |
| 2804 | #endif /* MAINTENANCE_CMDS */ |
| 2805 | |
| 2806 | add_com ("catch", class_breakpoint, catch_command, |
| 2807 | "Set breakpoints to catch exceptions that are raised.\n\ |
| 2808 | Argument may be a single exception to catch, multiple exceptions\n\ |
| 2809 | to catch, or the default exception \"default\". If no arguments\n\ |
| 2810 | are given, breakpoints are set at all exception handlers catch clauses\n\ |
| 2811 | within the current scope.\n\ |
| 2812 | \n\ |
| 2813 | A condition specified for the catch applies to all breakpoints set\n\ |
| 2814 | with this command\n\ |
| 2815 | \n\ |
| 2816 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); |
| 2817 | |
| 2818 | add_com ("watch", class_breakpoint, watch_command, |
| 2819 | "Set a watchpoint for an expression.\n\ |
| 2820 | A watchpoint stops execution of your program whenever the value of\n\ |
| 2821 | an expression changes."); |
| 2822 | |
| 2823 | add_info ("watchpoints", breakpoints_info, |
| 2824 | "Synonym for ``info breakpoints''."); |
| 2825 | } |
| 2826 | |
| 2827 | /* OK, when we call objfile_relocate, we need to relocate breakpoints |
| 2828 | too. breakpoint_re_set is not a good choice--for example, if |
| 2829 | addr_string contains just a line number without a file name the |
| 2830 | breakpoint might get set in a different file. In general, there is |
| 2831 | no need to go all the way back to the user's string (though this might |
| 2832 | work if some effort were made to canonicalize it), since symtabs and |
| 2833 | everything except addresses are still valid. |
| 2834 | |
| 2835 | Probably the best way to solve this is to have each breakpoint save |
| 2836 | the objfile and the section number that was used to set it (if set |
| 2837 | by "*addr", probably it is best to use find_pc_line to get a symtab |
| 2838 | and use the objfile and block_line_section for that symtab). Then |
| 2839 | objfile_relocate can call fixup_breakpoints with the objfile and |
| 2840 | the new_offsets, and it can relocate only the appropriate breakpoints. */ |
| 2841 | |
| 2842 | #ifdef IBM6000_TARGET |
| 2843 | /* But for now, just kludge it based on the concept that before an |
| 2844 | objfile is relocated the breakpoint is below 0x10000000, and afterwards |
| 2845 | it is higher, so that way we only relocate each breakpoint once. */ |
| 2846 | |
| 2847 | void |
| 2848 | fixup_breakpoints (low, high, delta) |
| 2849 | CORE_ADDR low; |
| 2850 | CORE_ADDR high; |
| 2851 | CORE_ADDR delta; |
| 2852 | { |
| 2853 | struct breakpoint *b; |
| 2854 | |
| 2855 | ALL_BREAKPOINTS (b) |
| 2856 | { |
| 2857 | if (b->address >= low && b->address <= high) |
| 2858 | b->address += delta; |
| 2859 | } |
| 2860 | } |
| 2861 | #endif |