| 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 "thread.h" |
| 34 | #include "target.h" |
| 35 | #include "language.h" |
| 36 | #include <string.h> |
| 37 | #include "demangle.h" |
| 38 | |
| 39 | /* local function prototypes */ |
| 40 | |
| 41 | static void |
| 42 | catch_command_1 PARAMS ((char *, int, int)); |
| 43 | |
| 44 | static void |
| 45 | enable_delete_command PARAMS ((char *, int)); |
| 46 | |
| 47 | static void |
| 48 | enable_delete_breakpoint PARAMS ((struct breakpoint *)); |
| 49 | |
| 50 | static void |
| 51 | enable_once_command PARAMS ((char *, int)); |
| 52 | |
| 53 | static void |
| 54 | enable_once_breakpoint PARAMS ((struct breakpoint *)); |
| 55 | |
| 56 | static void |
| 57 | disable_command PARAMS ((char *, int)); |
| 58 | |
| 59 | static void |
| 60 | disable_breakpoint PARAMS ((struct breakpoint *)); |
| 61 | |
| 62 | static void |
| 63 | enable_command PARAMS ((char *, int)); |
| 64 | |
| 65 | static void |
| 66 | enable_breakpoint PARAMS ((struct breakpoint *)); |
| 67 | |
| 68 | static void |
| 69 | map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *))); |
| 70 | |
| 71 | static void |
| 72 | ignore_command PARAMS ((char *, int)); |
| 73 | |
| 74 | static int |
| 75 | breakpoint_re_set_one PARAMS ((char *)); |
| 76 | |
| 77 | static void |
| 78 | delete_command PARAMS ((char *, int)); |
| 79 | |
| 80 | static void |
| 81 | clear_command PARAMS ((char *, int)); |
| 82 | |
| 83 | static void |
| 84 | catch_command PARAMS ((char *, int)); |
| 85 | |
| 86 | static struct symtabs_and_lines |
| 87 | get_catch_sals PARAMS ((int)); |
| 88 | |
| 89 | static void |
| 90 | watch_command PARAMS ((char *, int)); |
| 91 | |
| 92 | static void |
| 93 | tbreak_command PARAMS ((char *, int)); |
| 94 | |
| 95 | static void |
| 96 | break_command_1 PARAMS ((char *, int, int)); |
| 97 | |
| 98 | static void |
| 99 | mention PARAMS ((struct breakpoint *)); |
| 100 | |
| 101 | static struct breakpoint * |
| 102 | set_raw_breakpoint PARAMS ((struct symtab_and_line)); |
| 103 | |
| 104 | static void |
| 105 | check_duplicates PARAMS ((CORE_ADDR)); |
| 106 | |
| 107 | static void |
| 108 | describe_other_breakpoints PARAMS ((CORE_ADDR)); |
| 109 | |
| 110 | static void |
| 111 | breakpoints_info PARAMS ((char *, int)); |
| 112 | |
| 113 | static void |
| 114 | breakpoint_1 PARAMS ((int, int)); |
| 115 | |
| 116 | static bpstat |
| 117 | bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); |
| 118 | |
| 119 | static int |
| 120 | breakpoint_cond_eval PARAMS ((char *)); |
| 121 | |
| 122 | static void |
| 123 | cleanup_executing_breakpoints PARAMS ((int)); |
| 124 | |
| 125 | static void |
| 126 | commands_command PARAMS ((char *, int)); |
| 127 | |
| 128 | static void |
| 129 | condition_command PARAMS ((char *, int)); |
| 130 | |
| 131 | static int |
| 132 | get_number PARAMS ((char **)); |
| 133 | |
| 134 | static void |
| 135 | set_breakpoint_count PARAMS ((int)); |
| 136 | |
| 137 | |
| 138 | extern int addressprint; /* Print machine addresses? */ |
| 139 | extern int demangle; /* Print de-mangled symbol names? */ |
| 140 | |
| 141 | /* Are we executing breakpoint commands? */ |
| 142 | static int executing_breakpoint_commands; |
| 143 | |
| 144 | /* Walk the following statement or block through all breakpoints. |
| 145 | ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current |
| 146 | breakpoint. */ |
| 147 | |
| 148 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) |
| 149 | |
| 150 | #define ALL_BREAKPOINTS_SAFE(b,tmp) \ |
| 151 | for (b = breakpoint_chain; \ |
| 152 | b? (tmp=b->next, 1): 0; \ |
| 153 | b = tmp) |
| 154 | |
| 155 | /* Chain of all breakpoints defined. */ |
| 156 | |
| 157 | static struct breakpoint *breakpoint_chain; |
| 158 | |
| 159 | /* Number of last breakpoint made. */ |
| 160 | |
| 161 | static int breakpoint_count; |
| 162 | |
| 163 | /* Set breakpoint count to NUM. */ |
| 164 | static void |
| 165 | set_breakpoint_count (num) |
| 166 | int num; |
| 167 | { |
| 168 | breakpoint_count = num; |
| 169 | set_internalvar (lookup_internalvar ("bpnum"), |
| 170 | value_from_longest (builtin_type_int, (LONGEST) num)); |
| 171 | } |
| 172 | |
| 173 | /* Default address, symtab and line to put a breakpoint at |
| 174 | for "break" command with no arg. |
| 175 | if default_breakpoint_valid is zero, the other three are |
| 176 | not valid, and "break" with no arg is an error. |
| 177 | |
| 178 | This set by print_stack_frame, which calls set_default_breakpoint. */ |
| 179 | |
| 180 | int default_breakpoint_valid; |
| 181 | CORE_ADDR default_breakpoint_address; |
| 182 | struct symtab *default_breakpoint_symtab; |
| 183 | int default_breakpoint_line; |
| 184 | |
| 185 | /* Flag indicating extra verbosity for xgdb. */ |
| 186 | extern int xgdb_verbose; |
| 187 | \f |
| 188 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. |
| 189 | Advance *PP after the string and any trailing whitespace. |
| 190 | |
| 191 | Currently the string can either be a number or "$" followed by the name |
| 192 | of a convenience variable. Making it an expression wouldn't work well |
| 193 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ |
| 194 | static int |
| 195 | get_number (pp) |
| 196 | char **pp; |
| 197 | { |
| 198 | int retval; |
| 199 | char *p = *pp; |
| 200 | |
| 201 | if (p == NULL) |
| 202 | /* Empty line means refer to the last breakpoint. */ |
| 203 | return breakpoint_count; |
| 204 | else if (*p == '$') |
| 205 | { |
| 206 | /* Make a copy of the name, so we can null-terminate it |
| 207 | to pass to lookup_internalvar(). */ |
| 208 | char *varname; |
| 209 | char *start = ++p; |
| 210 | value val; |
| 211 | |
| 212 | while (isalnum (*p) || *p == '_') |
| 213 | p++; |
| 214 | varname = (char *) alloca (p - start + 1); |
| 215 | strncpy (varname, start, p - start); |
| 216 | varname[p - start] = '\0'; |
| 217 | val = value_of_internalvar (lookup_internalvar (varname)); |
| 218 | if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT) |
| 219 | error ( |
| 220 | "Convenience variables used to specify breakpoints must have integer values." |
| 221 | ); |
| 222 | retval = (int) value_as_long (val); |
| 223 | } |
| 224 | else |
| 225 | { |
| 226 | if (*p == '-') |
| 227 | ++p; |
| 228 | while (*p >= '0' && *p <= '9') |
| 229 | ++p; |
| 230 | if (p == *pp) |
| 231 | /* There is no number here. (e.g. "cond a == b"). */ |
| 232 | error_no_arg ("breakpoint number"); |
| 233 | retval = atoi (*pp); |
| 234 | } |
| 235 | if (!(isspace (*p) || *p == '\0')) |
| 236 | error ("breakpoint number expected"); |
| 237 | while (isspace (*p)) |
| 238 | p++; |
| 239 | *pp = p; |
| 240 | return retval; |
| 241 | } |
| 242 | \f |
| 243 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ |
| 244 | |
| 245 | static void |
| 246 | condition_command (arg, from_tty) |
| 247 | char *arg; |
| 248 | int from_tty; |
| 249 | { |
| 250 | register struct breakpoint *b; |
| 251 | char *p; |
| 252 | register int bnum; |
| 253 | |
| 254 | if (arg == 0) |
| 255 | error_no_arg ("breakpoint number"); |
| 256 | |
| 257 | p = arg; |
| 258 | bnum = get_number (&p); |
| 259 | |
| 260 | ALL_BREAKPOINTS (b) |
| 261 | if (b->number == bnum) |
| 262 | { |
| 263 | if (b->cond) |
| 264 | { |
| 265 | free ((PTR)b->cond); |
| 266 | b->cond = 0; |
| 267 | } |
| 268 | if (b->cond_string != NULL) |
| 269 | free ((PTR)b->cond_string); |
| 270 | |
| 271 | if (*p == 0) |
| 272 | { |
| 273 | b->cond = 0; |
| 274 | b->cond_string = NULL; |
| 275 | if (from_tty) |
| 276 | printf_filtered ("Breakpoint %d now unconditional.\n", bnum); |
| 277 | } |
| 278 | else |
| 279 | { |
| 280 | arg = p; |
| 281 | /* I don't know if it matters whether this is the string the user |
| 282 | typed in or the decompiled expression. */ |
| 283 | b->cond_string = savestring (arg, strlen (arg)); |
| 284 | b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); |
| 285 | if (*arg) |
| 286 | error ("Junk at end of expression"); |
| 287 | } |
| 288 | return; |
| 289 | } |
| 290 | |
| 291 | error ("No breakpoint number %d.", bnum); |
| 292 | } |
| 293 | |
| 294 | /* ARGSUSED */ |
| 295 | static void |
| 296 | commands_command (arg, from_tty) |
| 297 | char *arg; |
| 298 | int from_tty; |
| 299 | { |
| 300 | register struct breakpoint *b; |
| 301 | char *p; |
| 302 | register int bnum; |
| 303 | struct command_line *l; |
| 304 | |
| 305 | /* If we allowed this, we would have problems with when to |
| 306 | free the storage, if we change the commands currently |
| 307 | being read from. */ |
| 308 | |
| 309 | if (executing_breakpoint_commands) |
| 310 | error ("Can't use the \"commands\" command among a breakpoint's commands."); |
| 311 | |
| 312 | p = arg; |
| 313 | bnum = get_number (&p); |
| 314 | if (p && *p) |
| 315 | error ("Unexpected extra arguments following breakpoint number."); |
| 316 | |
| 317 | ALL_BREAKPOINTS (b) |
| 318 | if (b->number == bnum) |
| 319 | { |
| 320 | if (from_tty && input_from_terminal_p ()) |
| 321 | printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\ |
| 322 | End with a line saying just \"end\".\n", bnum); |
| 323 | l = read_command_lines (); |
| 324 | free_command_lines (&b->commands); |
| 325 | b->commands = l; |
| 326 | return; |
| 327 | } |
| 328 | error ("No breakpoint number %d.", bnum); |
| 329 | } |
| 330 | \f |
| 331 | extern int memory_breakpoint_size; /* from mem-break.c */ |
| 332 | |
| 333 | /* Like target_read_memory() but if breakpoints are inserted, return |
| 334 | the shadow contents instead of the breakpoints themselves. |
| 335 | |
| 336 | Read "memory data" from whatever target or inferior we have. |
| 337 | Returns zero if successful, errno value if not. EIO is used |
| 338 | for address out of bounds. If breakpoints are inserted, returns |
| 339 | shadow contents, not the breakpoints themselves. From breakpoint.c. */ |
| 340 | |
| 341 | int |
| 342 | read_memory_nobpt (memaddr, myaddr, len) |
| 343 | CORE_ADDR memaddr; |
| 344 | char *myaddr; |
| 345 | unsigned len; |
| 346 | { |
| 347 | int status; |
| 348 | struct breakpoint *b; |
| 349 | |
| 350 | if (memory_breakpoint_size < 0) |
| 351 | /* No breakpoints on this machine. FIXME: This should be |
| 352 | dependent on the debugging target. Probably want |
| 353 | target_insert_breakpoint to return a size, saying how many |
| 354 | bytes of the shadow contents are used, or perhaps have |
| 355 | something like target_xfer_shadow. */ |
| 356 | return target_read_memory (memaddr, myaddr, len); |
| 357 | |
| 358 | ALL_BREAKPOINTS (b) |
| 359 | { |
| 360 | if (b->type == bp_watchpoint || !b->inserted) |
| 361 | continue; |
| 362 | else if (b->address + memory_breakpoint_size <= memaddr) |
| 363 | /* The breakpoint is entirely before the chunk of memory |
| 364 | we are reading. */ |
| 365 | continue; |
| 366 | else if (b->address >= memaddr + len) |
| 367 | /* The breakpoint is entirely after the chunk of memory we |
| 368 | are reading. */ |
| 369 | continue; |
| 370 | else |
| 371 | { |
| 372 | /* Copy the breakpoint from the shadow contents, and recurse |
| 373 | for the things before and after. */ |
| 374 | |
| 375 | /* Addresses and length of the part of the breakpoint that |
| 376 | we need to copy. */ |
| 377 | CORE_ADDR membpt = b->address; |
| 378 | unsigned int bptlen = memory_breakpoint_size; |
| 379 | /* Offset within shadow_contents. */ |
| 380 | int bptoffset = 0; |
| 381 | |
| 382 | if (membpt < memaddr) |
| 383 | { |
| 384 | /* Only copy the second part of the breakpoint. */ |
| 385 | bptlen -= memaddr - membpt; |
| 386 | bptoffset = memaddr - membpt; |
| 387 | membpt = memaddr; |
| 388 | } |
| 389 | |
| 390 | if (membpt + bptlen > memaddr + len) |
| 391 | { |
| 392 | /* Only copy the first part of the breakpoint. */ |
| 393 | bptlen -= (membpt + bptlen) - (memaddr + len); |
| 394 | } |
| 395 | |
| 396 | memcpy (myaddr + membpt - memaddr, |
| 397 | b->shadow_contents + bptoffset, bptlen); |
| 398 | |
| 399 | if (membpt > memaddr) |
| 400 | { |
| 401 | /* Copy the section of memory before the breakpoint. */ |
| 402 | status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr); |
| 403 | if (status != 0) |
| 404 | return status; |
| 405 | } |
| 406 | |
| 407 | if (membpt + bptlen < memaddr + len) |
| 408 | { |
| 409 | /* Copy the section of memory after the breakpoint. */ |
| 410 | status = read_memory_nobpt |
| 411 | (membpt + bptlen, |
| 412 | myaddr + membpt + bptlen - memaddr, |
| 413 | memaddr + len - (membpt + bptlen)); |
| 414 | if (status != 0) |
| 415 | return status; |
| 416 | } |
| 417 | return 0; |
| 418 | } |
| 419 | } |
| 420 | /* Nothing overlaps. Just call read_memory_noerr. */ |
| 421 | return target_read_memory (memaddr, myaddr, len); |
| 422 | } |
| 423 | \f |
| 424 | /* insert_breakpoints is used when starting or continuing the program. |
| 425 | remove_breakpoints is used when the program stops. |
| 426 | Both return zero if successful, |
| 427 | or an `errno' value if could not write the inferior. */ |
| 428 | |
| 429 | int |
| 430 | insert_breakpoints () |
| 431 | { |
| 432 | register struct breakpoint *b; |
| 433 | int val = 0; |
| 434 | int disabled_breaks = 0; |
| 435 | |
| 436 | ALL_BREAKPOINTS (b) |
| 437 | if (b->type != bp_watchpoint |
| 438 | && b->enable != disabled |
| 439 | && ! b->inserted |
| 440 | && ! b->duplicate) |
| 441 | { |
| 442 | val = target_insert_breakpoint(b->address, b->shadow_contents); |
| 443 | if (val) |
| 444 | { |
| 445 | /* Can't set the breakpoint. */ |
| 446 | #if defined (DISABLE_UNSETTABLE_BREAK) |
| 447 | if (DISABLE_UNSETTABLE_BREAK (b->address)) |
| 448 | { |
| 449 | val = 0; |
| 450 | b->enable = disabled; |
| 451 | if (!disabled_breaks) |
| 452 | { |
| 453 | target_terminal_ours_for_output (); |
| 454 | fprintf_unfiltered (gdb_stderr, |
| 455 | "Cannot insert breakpoint %d:\n", b->number); |
| 456 | printf_filtered ("Disabling shared library breakpoints:\n"); |
| 457 | } |
| 458 | disabled_breaks = 1; |
| 459 | printf_filtered ("%d ", b->number); |
| 460 | } |
| 461 | else |
| 462 | #endif |
| 463 | { |
| 464 | target_terminal_ours_for_output (); |
| 465 | fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); |
| 466 | #ifdef ONE_PROCESS_WRITETEXT |
| 467 | fprintf_unfiltered (gdb_stderr, |
| 468 | "The same program may be running in another process.\n"); |
| 469 | #endif |
| 470 | memory_error (val, b->address); /* which bombs us out */ |
| 471 | } |
| 472 | } |
| 473 | else |
| 474 | b->inserted = 1; |
| 475 | } |
| 476 | if (disabled_breaks) |
| 477 | printf_filtered ("\n"); |
| 478 | return val; |
| 479 | } |
| 480 | |
| 481 | int |
| 482 | remove_breakpoints () |
| 483 | { |
| 484 | register struct breakpoint *b; |
| 485 | int val; |
| 486 | |
| 487 | ALL_BREAKPOINTS (b) |
| 488 | if (b->type != bp_watchpoint && b->inserted) |
| 489 | { |
| 490 | val = target_remove_breakpoint(b->address, b->shadow_contents); |
| 491 | if (val) |
| 492 | return val; |
| 493 | b->inserted = 0; |
| 494 | } |
| 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | /* Clear the "inserted" flag in all breakpoints. */ |
| 500 | |
| 501 | void |
| 502 | mark_breakpoints_out () |
| 503 | { |
| 504 | register struct breakpoint *b; |
| 505 | |
| 506 | ALL_BREAKPOINTS (b) |
| 507 | b->inserted = 0; |
| 508 | } |
| 509 | |
| 510 | /* Clear the "inserted" flag in all breakpoints and delete any breakpoints |
| 511 | which should go away between runs of the program. */ |
| 512 | |
| 513 | void |
| 514 | breakpoint_init_inferior () |
| 515 | { |
| 516 | register struct breakpoint *b, *temp; |
| 517 | |
| 518 | ALL_BREAKPOINTS_SAFE (b, temp) |
| 519 | { |
| 520 | b->inserted = 0; |
| 521 | |
| 522 | /* If the call dummy breakpoint is at the entry point it will |
| 523 | cause problems when the inferior is rerun, so we better |
| 524 | get rid of it. */ |
| 525 | if (b->type == bp_call_dummy) |
| 526 | delete_breakpoint (b); |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. |
| 531 | When continuing from a location with a breakpoint, |
| 532 | we actually single step once before calling insert_breakpoints. */ |
| 533 | |
| 534 | int |
| 535 | breakpoint_here_p (pc) |
| 536 | CORE_ADDR pc; |
| 537 | { |
| 538 | register struct breakpoint *b; |
| 539 | |
| 540 | ALL_BREAKPOINTS (b) |
| 541 | if (b->enable != disabled && b->address == pc) |
| 542 | return 1; |
| 543 | |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | /* Return nonzero if FRAME is a dummy frame. We can't use PC_IN_CALL_DUMMY |
| 548 | because figuring out the saved SP would take too much time, at least using |
| 549 | get_saved_register on the 68k. This means that for this function to |
| 550 | work right a port must use the bp_call_dummy breakpoint. */ |
| 551 | |
| 552 | int |
| 553 | frame_in_dummy (frame) |
| 554 | FRAME frame; |
| 555 | { |
| 556 | struct breakpoint *b; |
| 557 | |
| 558 | #ifdef CALL_DUMMY |
| 559 | ALL_BREAKPOINTS (b) |
| 560 | { |
| 561 | static unsigned LONGEST dummy[] = CALL_DUMMY; |
| 562 | |
| 563 | if (b->type == bp_call_dummy |
| 564 | && b->frame == frame->frame |
| 565 | |
| 566 | /* We need to check the PC as well as the frame on the sparc, |
| 567 | for signals.exp in the testsuite. */ |
| 568 | && (frame->pc |
| 569 | >= (b->address |
| 570 | - sizeof (dummy) / sizeof (LONGEST) * REGISTER_SIZE)) |
| 571 | && frame->pc <= b->address) |
| 572 | return 1; |
| 573 | } |
| 574 | #endif /* CALL_DUMMY */ |
| 575 | return 0; |
| 576 | } |
| 577 | |
| 578 | /* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC |
| 579 | is valid for process/thread PID. */ |
| 580 | |
| 581 | int |
| 582 | breakpoint_thread_match (pc, pid) |
| 583 | CORE_ADDR pc; |
| 584 | int pid; |
| 585 | { |
| 586 | struct breakpoint *b; |
| 587 | int thread; |
| 588 | |
| 589 | thread = pid_to_thread_id (pid); |
| 590 | |
| 591 | ALL_BREAKPOINTS (b) |
| 592 | if (b->enable != disabled |
| 593 | && b->address == pc |
| 594 | && (b->thread == -1 || b->thread == thread)) |
| 595 | return 1; |
| 596 | |
| 597 | return 0; |
| 598 | } |
| 599 | |
| 600 | \f |
| 601 | /* bpstat stuff. External routines' interfaces are documented |
| 602 | in breakpoint.h. */ |
| 603 | |
| 604 | /* Clear a bpstat so that it says we are not at any breakpoint. |
| 605 | Also free any storage that is part of a bpstat. */ |
| 606 | |
| 607 | void |
| 608 | bpstat_clear (bsp) |
| 609 | bpstat *bsp; |
| 610 | { |
| 611 | bpstat p; |
| 612 | bpstat q; |
| 613 | |
| 614 | if (bsp == 0) |
| 615 | return; |
| 616 | p = *bsp; |
| 617 | while (p != NULL) |
| 618 | { |
| 619 | q = p->next; |
| 620 | if (p->old_val != NULL) |
| 621 | value_free (p->old_val); |
| 622 | free ((PTR)p); |
| 623 | p = q; |
| 624 | } |
| 625 | *bsp = NULL; |
| 626 | } |
| 627 | |
| 628 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
| 629 | is part of the bpstat is copied as well. */ |
| 630 | |
| 631 | bpstat |
| 632 | bpstat_copy (bs) |
| 633 | bpstat bs; |
| 634 | { |
| 635 | bpstat p = NULL; |
| 636 | bpstat tmp; |
| 637 | bpstat retval = NULL; |
| 638 | |
| 639 | if (bs == NULL) |
| 640 | return bs; |
| 641 | |
| 642 | for (; bs != NULL; bs = bs->next) |
| 643 | { |
| 644 | tmp = (bpstat) xmalloc (sizeof (*tmp)); |
| 645 | memcpy (tmp, bs, sizeof (*tmp)); |
| 646 | if (p == NULL) |
| 647 | /* This is the first thing in the chain. */ |
| 648 | retval = tmp; |
| 649 | else |
| 650 | p->next = tmp; |
| 651 | p = tmp; |
| 652 | } |
| 653 | p->next = NULL; |
| 654 | return retval; |
| 655 | } |
| 656 | |
| 657 | /* Find the bpstat associated with this breakpoint */ |
| 658 | |
| 659 | bpstat |
| 660 | bpstat_find_breakpoint(bsp, breakpoint) |
| 661 | bpstat bsp; |
| 662 | struct breakpoint *breakpoint; |
| 663 | { |
| 664 | if (bsp == NULL) return NULL; |
| 665 | |
| 666 | for (;bsp != NULL; bsp = bsp->next) { |
| 667 | if (bsp->breakpoint_at == breakpoint) return bsp; |
| 668 | } |
| 669 | return NULL; |
| 670 | } |
| 671 | |
| 672 | /* Return the breakpoint number of the first breakpoint we are stopped |
| 673 | at. *BSP upon return is a bpstat which points to the remaining |
| 674 | breakpoints stopped at (but which is not guaranteed to be good for |
| 675 | anything but further calls to bpstat_num). |
| 676 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ |
| 677 | |
| 678 | int |
| 679 | bpstat_num (bsp) |
| 680 | bpstat *bsp; |
| 681 | { |
| 682 | struct breakpoint *b; |
| 683 | |
| 684 | if ((*bsp) == NULL) |
| 685 | return 0; /* No more breakpoint values */ |
| 686 | else |
| 687 | { |
| 688 | b = (*bsp)->breakpoint_at; |
| 689 | *bsp = (*bsp)->next; |
| 690 | if (b == NULL) |
| 691 | return -1; /* breakpoint that's been deleted since */ |
| 692 | else |
| 693 | return b->number; /* We have its number */ |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | /* Modify BS so that the actions will not be performed. */ |
| 698 | |
| 699 | void |
| 700 | bpstat_clear_actions (bs) |
| 701 | bpstat bs; |
| 702 | { |
| 703 | for (; bs != NULL; bs = bs->next) |
| 704 | { |
| 705 | bs->commands = NULL; |
| 706 | if (bs->old_val != NULL) |
| 707 | { |
| 708 | value_free (bs->old_val); |
| 709 | bs->old_val = NULL; |
| 710 | } |
| 711 | } |
| 712 | } |
| 713 | |
| 714 | /* Stub for cleaning up our state if we error-out of a breakpoint command */ |
| 715 | /* ARGSUSED */ |
| 716 | static void |
| 717 | cleanup_executing_breakpoints (ignore) |
| 718 | int ignore; |
| 719 | { |
| 720 | executing_breakpoint_commands = 0; |
| 721 | } |
| 722 | |
| 723 | /* Execute all the commands associated with all the breakpoints at this |
| 724 | location. Any of these commands could cause the process to proceed |
| 725 | beyond this point, etc. We look out for such changes by checking |
| 726 | the global "breakpoint_proceeded" after each command. */ |
| 727 | |
| 728 | void |
| 729 | bpstat_do_actions (bsp) |
| 730 | bpstat *bsp; |
| 731 | { |
| 732 | bpstat bs; |
| 733 | struct cleanup *old_chain; |
| 734 | |
| 735 | executing_breakpoint_commands = 1; |
| 736 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); |
| 737 | |
| 738 | top: |
| 739 | bs = *bsp; |
| 740 | |
| 741 | breakpoint_proceeded = 0; |
| 742 | for (; bs != NULL; bs = bs->next) |
| 743 | { |
| 744 | while (bs->commands) |
| 745 | { |
| 746 | char *line = bs->commands->line; |
| 747 | bs->commands = bs->commands->next; |
| 748 | execute_command (line, 0); |
| 749 | /* If the inferior is proceeded by the command, bomb out now. |
| 750 | The bpstat chain has been blown away by wait_for_inferior. |
| 751 | But since execution has stopped again, there is a new bpstat |
| 752 | to look at, so start over. */ |
| 753 | if (breakpoint_proceeded) |
| 754 | goto top; |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | executing_breakpoint_commands = 0; |
| 759 | discard_cleanups (old_chain); |
| 760 | } |
| 761 | |
| 762 | /* This is the normal print_it function for a bpstat. In the future, |
| 763 | much of this logic could (should?) be moved to bpstat_stop_status, |
| 764 | by having it set different print_it functions. */ |
| 765 | |
| 766 | static int |
| 767 | print_it_normal (bs) |
| 768 | bpstat bs; |
| 769 | { |
| 770 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint |
| 771 | which has since been deleted. */ |
| 772 | if (bs->breakpoint_at == NULL |
| 773 | || (bs->breakpoint_at->type != bp_breakpoint |
| 774 | && bs->breakpoint_at->type != bp_watchpoint)) |
| 775 | return 0; |
| 776 | |
| 777 | if (bs->breakpoint_at->type == bp_breakpoint) |
| 778 | { |
| 779 | /* I think the user probably only wants to see one breakpoint |
| 780 | number, not all of them. */ |
| 781 | printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); |
| 782 | return 0; |
| 783 | } |
| 784 | |
| 785 | if (bs->old_val != NULL) |
| 786 | { |
| 787 | printf_filtered ("\nWatchpoint %d, ", bs->breakpoint_at->number); |
| 788 | print_expression (bs->breakpoint_at->exp, gdb_stdout); |
| 789 | printf_filtered ("\nOld value = "); |
| 790 | value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default); |
| 791 | printf_filtered ("\nNew value = "); |
| 792 | value_print (bs->breakpoint_at->val, gdb_stdout, 0, |
| 793 | Val_pretty_default); |
| 794 | printf_filtered ("\n"); |
| 795 | value_free (bs->old_val); |
| 796 | bs->old_val = NULL; |
| 797 | return 0; |
| 798 | } |
| 799 | /* We can't deal with it. Maybe another member of the bpstat chain can. */ |
| 800 | return -1; |
| 801 | } |
| 802 | |
| 803 | /* Print a message indicating what happened. Returns nonzero to |
| 804 | say that only the source line should be printed after this (zero |
| 805 | return means print the frame as well as the source line). */ |
| 806 | /* Currently we always return zero. */ |
| 807 | int |
| 808 | bpstat_print (bs) |
| 809 | bpstat bs; |
| 810 | { |
| 811 | int val; |
| 812 | |
| 813 | if (bs == NULL) |
| 814 | return 0; |
| 815 | |
| 816 | val = (*bs->print_it) (bs); |
| 817 | if (val >= 0) |
| 818 | return val; |
| 819 | |
| 820 | /* Maybe another breakpoint in the chain caused us to stop. |
| 821 | (Currently all watchpoints go on the bpstat whether hit or |
| 822 | not. That probably could (should) be changed, provided care is taken |
| 823 | with respect to bpstat_explains_signal). */ |
| 824 | if (bs->next) |
| 825 | return bpstat_print (bs->next); |
| 826 | |
| 827 | /* We reached the end of the chain without printing anything. */ |
| 828 | return 0; |
| 829 | } |
| 830 | |
| 831 | /* Evaluate the expression EXP and return 1 if value is zero. |
| 832 | This is used inside a catch_errors to evaluate the breakpoint condition. |
| 833 | The argument is a "struct expression *" that has been cast to char * to |
| 834 | make it pass through catch_errors. */ |
| 835 | |
| 836 | static int |
| 837 | breakpoint_cond_eval (exp) |
| 838 | char *exp; |
| 839 | { |
| 840 | return !value_true (evaluate_expression ((struct expression *)exp)); |
| 841 | } |
| 842 | |
| 843 | /* Allocate a new bpstat and chain it to the current one. */ |
| 844 | |
| 845 | static bpstat |
| 846 | bpstat_alloc (b, cbs) |
| 847 | register struct breakpoint *b; |
| 848 | bpstat cbs; /* Current "bs" value */ |
| 849 | { |
| 850 | bpstat bs; |
| 851 | |
| 852 | bs = (bpstat) xmalloc (sizeof (*bs)); |
| 853 | cbs->next = bs; |
| 854 | bs->breakpoint_at = b; |
| 855 | /* If the condition is false, etc., don't do the commands. */ |
| 856 | bs->commands = NULL; |
| 857 | bs->old_val = NULL; |
| 858 | bs->print_it = print_it_normal; |
| 859 | return bs; |
| 860 | } |
| 861 | \f |
| 862 | /* Return the frame which we can use to evaluate the expression |
| 863 | whose valid block is valid_block, or NULL if not in scope. |
| 864 | |
| 865 | This whole concept is probably not the way to do things (it is incredibly |
| 866 | slow being the main reason, not to mention fragile (e.g. the sparc |
| 867 | frame pointer being fetched as 0 bug causes it to stop)). Instead, |
| 868 | introduce a version of "struct frame" which survives over calls to the |
| 869 | inferior, but which is better than FRAME_ADDR in the sense that it lets |
| 870 | us evaluate expressions relative to that frame (on some machines, it |
| 871 | can just be a FRAME_ADDR). Save one of those instead of (or in addition |
| 872 | to) the exp_valid_block, and then use it to evaluate the watchpoint |
| 873 | expression, with no need to do all this backtracing every time. |
| 874 | |
| 875 | Or better yet, what if it just copied the struct frame and its next |
| 876 | frame? Off the top of my head, I would think that would work |
| 877 | because things like (a29k) rsize and msize, or (sparc) bottom just |
| 878 | depend on the frame, and aren't going to be different just because |
| 879 | the inferior has done something. Trying to recalculate them |
| 880 | strikes me as a lot of work, possibly even impossible. Saving the |
| 881 | next frame is needed at least on a29k, where get_saved_register |
| 882 | uses fi->next->saved_msp. For figuring out whether that frame is |
| 883 | still on the stack, I guess this needs to be machine-specific (e.g. |
| 884 | a29k) but I think |
| 885 | |
| 886 | read_fp () INNER_THAN watchpoint_frame->frame |
| 887 | |
| 888 | would generally work. |
| 889 | |
| 890 | Of course the scope of the expression could be less than a whole |
| 891 | function; perhaps if the innermost frame is the one which the |
| 892 | watchpoint is relative to (another machine-specific thing, usually |
| 893 | |
| 894 | FRAMELESS_FUNCTION_INVOCATION (get_current_frame(), fromleaf) |
| 895 | read_fp () == wp_frame->frame |
| 896 | && !fromleaf |
| 897 | |
| 898 | ), *then* it could do a |
| 899 | |
| 900 | contained_in (get_current_block (), wp->exp_valid_block). |
| 901 | |
| 902 | */ |
| 903 | |
| 904 | FRAME |
| 905 | within_scope (valid_block) |
| 906 | struct block *valid_block; |
| 907 | { |
| 908 | FRAME fr = get_current_frame (); |
| 909 | struct frame_info *fi = get_frame_info (fr); |
| 910 | CORE_ADDR func_start; |
| 911 | |
| 912 | /* If caller_pc_valid is true, we are stepping through |
| 913 | a function prologue, which is bounded by callee_func_start |
| 914 | (inclusive) and callee_prologue_end (exclusive). |
| 915 | caller_pc is the pc of the caller. |
| 916 | |
| 917 | Yes, this is hairy. */ |
| 918 | static int caller_pc_valid = 0; |
| 919 | static CORE_ADDR caller_pc; |
| 920 | static CORE_ADDR callee_func_start; |
| 921 | static CORE_ADDR callee_prologue_end; |
| 922 | |
| 923 | find_pc_partial_function (fi->pc, (PTR)NULL, &func_start, (CORE_ADDR *)NULL); |
| 924 | func_start += FUNCTION_START_OFFSET; |
| 925 | if (fi->pc == func_start) |
| 926 | { |
| 927 | /* We just called a function. The only other case I |
| 928 | can think of where the pc would equal the pc of the |
| 929 | start of a function is a frameless function (i.e. |
| 930 | no prologue) where we branch back to the start |
| 931 | of the function. In that case, SKIP_PROLOGUE won't |
| 932 | find one, and we'll clear caller_pc_valid a few lines |
| 933 | down. */ |
| 934 | caller_pc_valid = 1; |
| 935 | caller_pc = SAVED_PC_AFTER_CALL (fr); |
| 936 | callee_func_start = func_start; |
| 937 | SKIP_PROLOGUE (func_start); |
| 938 | callee_prologue_end = func_start; |
| 939 | } |
| 940 | if (caller_pc_valid) |
| 941 | { |
| 942 | if (fi->pc < callee_func_start |
| 943 | || fi->pc >= callee_prologue_end) |
| 944 | caller_pc_valid = 0; |
| 945 | } |
| 946 | |
| 947 | if (contained_in (block_for_pc (caller_pc_valid |
| 948 | ? caller_pc |
| 949 | : fi->pc), |
| 950 | valid_block)) |
| 951 | { |
| 952 | return fr; |
| 953 | } |
| 954 | fr = get_prev_frame (fr); |
| 955 | |
| 956 | /* If any active frame is in the exp_valid_block, then it's |
| 957 | OK. Note that this might not be the same invocation of |
| 958 | the exp_valid_block that we were watching a little while |
| 959 | ago, or the same one as when the watchpoint was set (e.g. |
| 960 | we are watching a local variable in a recursive function. |
| 961 | When we return from a recursive invocation, then we are |
| 962 | suddenly watching a different instance of the variable). |
| 963 | |
| 964 | At least for now I am going to consider this a feature. */ |
| 965 | for (; fr != NULL; fr = get_prev_frame (fr)) |
| 966 | { |
| 967 | fi = get_frame_info (fr); |
| 968 | if (contained_in (block_for_pc (fi->pc), |
| 969 | valid_block)) |
| 970 | { |
| 971 | return fr; |
| 972 | } |
| 973 | } |
| 974 | return NULL; |
| 975 | } |
| 976 | |
| 977 | /* Possible return values for watchpoint_check (this can't be an enum |
| 978 | because of check_errors). */ |
| 979 | /* The watchpoint has been disabled. */ |
| 980 | #define WP_DISABLED 1 |
| 981 | /* The value has changed. */ |
| 982 | #define WP_VALUE_CHANGED 2 |
| 983 | /* The value has not changed. */ |
| 984 | #define WP_VALUE_NOT_CHANGED 3 |
| 985 | |
| 986 | /* Check watchpoint condition. */ |
| 987 | static int |
| 988 | watchpoint_check (p) |
| 989 | char *p; |
| 990 | { |
| 991 | bpstat bs = (bpstat) p; |
| 992 | FRAME fr; |
| 993 | |
| 994 | int within_current_scope; |
| 995 | if (bs->breakpoint_at->exp_valid_block == NULL) |
| 996 | within_current_scope = 1; |
| 997 | else |
| 998 | { |
| 999 | fr = within_scope (bs->breakpoint_at->exp_valid_block); |
| 1000 | within_current_scope = fr != NULL; |
| 1001 | if (within_current_scope) |
| 1002 | /* If we end up stopping, the current frame will get selected |
| 1003 | in normal_stop. So this call to select_frame won't affect |
| 1004 | the user. */ |
| 1005 | select_frame (fr, -1); |
| 1006 | } |
| 1007 | |
| 1008 | if (within_current_scope) |
| 1009 | { |
| 1010 | /* We use value_{,free_to_}mark because it could be a |
| 1011 | *long* time before we return to the command level and |
| 1012 | call free_all_values. We can't call free_all_values because |
| 1013 | we might be in the middle of evaluating a function call. */ |
| 1014 | |
| 1015 | value mark = value_mark (); |
| 1016 | value new_val = evaluate_expression (bs->breakpoint_at->exp); |
| 1017 | if (!value_equal (bs->breakpoint_at->val, new_val)) |
| 1018 | { |
| 1019 | release_value (new_val); |
| 1020 | value_free_to_mark (mark); |
| 1021 | bs->old_val = bs->breakpoint_at->val; |
| 1022 | bs->breakpoint_at->val = new_val; |
| 1023 | /* We will stop here */ |
| 1024 | return WP_VALUE_CHANGED; |
| 1025 | } |
| 1026 | else |
| 1027 | { |
| 1028 | /* Nothing changed, don't do anything. */ |
| 1029 | value_free_to_mark (mark); |
| 1030 | /* We won't stop here */ |
| 1031 | return WP_VALUE_NOT_CHANGED; |
| 1032 | } |
| 1033 | } |
| 1034 | else |
| 1035 | { |
| 1036 | /* This seems like the only logical thing to do because |
| 1037 | if we temporarily ignored the watchpoint, then when |
| 1038 | we reenter the block in which it is valid it contains |
| 1039 | garbage (in the case of a function, it may have two |
| 1040 | garbage values, one before and one after the prologue). |
| 1041 | So we can't even detect the first assignment to it and |
| 1042 | watch after that (since the garbage may or may not equal |
| 1043 | the first value assigned). */ |
| 1044 | bs->breakpoint_at->enable = disabled; |
| 1045 | printf_filtered ("\ |
| 1046 | Watchpoint %d disabled because the program has left the block in\n\ |
| 1047 | which its expression is valid.\n", bs->breakpoint_at->number); |
| 1048 | return WP_DISABLED; |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | /* This is used when everything which needs to be printed has |
| 1053 | already been printed. But we still want to print the frame. */ |
| 1054 | static int |
| 1055 | print_it_done (bs) |
| 1056 | bpstat bs; |
| 1057 | { |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | /* This is used when nothing should be printed for this bpstat entry. */ |
| 1062 | |
| 1063 | static int |
| 1064 | print_it_noop (bs) |
| 1065 | bpstat bs; |
| 1066 | { |
| 1067 | return -1; |
| 1068 | } |
| 1069 | |
| 1070 | /* Get a bpstat associated with having just stopped at address *PC |
| 1071 | and frame address FRAME_ADDRESS. Update *PC to point at the |
| 1072 | breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero |
| 1073 | if this is known to not be a real breakpoint (it could still be a |
| 1074 | watchpoint, though). */ |
| 1075 | |
| 1076 | /* Determine whether we stopped at a breakpoint, etc, or whether we |
| 1077 | don't understand this stop. Result is a chain of bpstat's such that: |
| 1078 | |
| 1079 | if we don't understand the stop, the result is a null pointer. |
| 1080 | |
| 1081 | if we understand why we stopped, the result is not null. |
| 1082 | |
| 1083 | Each element of the chain refers to a particular breakpoint or |
| 1084 | watchpoint at which we have stopped. (We may have stopped for |
| 1085 | several reasons concurrently.) |
| 1086 | |
| 1087 | Each element of the chain has valid next, breakpoint_at, |
| 1088 | commands, FIXME??? fields. |
| 1089 | |
| 1090 | */ |
| 1091 | |
| 1092 | bpstat |
| 1093 | bpstat_stop_status (pc, frame_address, not_a_breakpoint) |
| 1094 | CORE_ADDR *pc; |
| 1095 | FRAME_ADDR frame_address; |
| 1096 | int not_a_breakpoint; |
| 1097 | { |
| 1098 | register struct breakpoint *b; |
| 1099 | CORE_ADDR bp_addr; |
| 1100 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
| 1101 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ |
| 1102 | int real_breakpoint = 0; |
| 1103 | #endif |
| 1104 | /* Root of the chain of bpstat's */ |
| 1105 | struct bpstat root_bs[1]; |
| 1106 | /* Pointer to the last thing in the chain currently. */ |
| 1107 | bpstat bs = root_bs; |
| 1108 | |
| 1109 | /* Get the address where the breakpoint would have been. */ |
| 1110 | bp_addr = *pc - DECR_PC_AFTER_BREAK; |
| 1111 | |
| 1112 | ALL_BREAKPOINTS (b) |
| 1113 | { |
| 1114 | if (b->enable == disabled) |
| 1115 | continue; |
| 1116 | |
| 1117 | if (b->type != bp_watchpoint && b->address != bp_addr) |
| 1118 | continue; |
| 1119 | |
| 1120 | if (b->type != bp_watchpoint && not_a_breakpoint) |
| 1121 | continue; |
| 1122 | |
| 1123 | /* Come here if it's a watchpoint, or if the break address matches */ |
| 1124 | |
| 1125 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ |
| 1126 | |
| 1127 | bs->stop = 1; |
| 1128 | bs->print = 1; |
| 1129 | |
| 1130 | if (b->type == bp_watchpoint) |
| 1131 | { |
| 1132 | static char message1[] = |
| 1133 | "Error evaluating expression for watchpoint %d\n"; |
| 1134 | char message[sizeof (message1) + 30 /* slop */]; |
| 1135 | sprintf (message, message1, b->number); |
| 1136 | switch (catch_errors (watchpoint_check, (char *) bs, message, |
| 1137 | RETURN_MASK_ALL)) |
| 1138 | { |
| 1139 | case WP_DISABLED: |
| 1140 | /* We've already printed what needs to be printed. */ |
| 1141 | bs->print_it = print_it_done; |
| 1142 | /* Stop. */ |
| 1143 | break; |
| 1144 | case WP_VALUE_CHANGED: |
| 1145 | /* Stop. */ |
| 1146 | break; |
| 1147 | case WP_VALUE_NOT_CHANGED: |
| 1148 | /* Don't stop. */ |
| 1149 | bs->print_it = print_it_noop; |
| 1150 | bs->stop = 0; |
| 1151 | continue; |
| 1152 | default: |
| 1153 | /* Can't happen. */ |
| 1154 | /* FALLTHROUGH */ |
| 1155 | case 0: |
| 1156 | /* Error from catch_errors. */ |
| 1157 | b->enable = disabled; |
| 1158 | printf_filtered ("Watchpoint %d disabled.\n", b->number); |
| 1159 | /* We've already printed what needs to be printed. */ |
| 1160 | bs->print_it = print_it_done; |
| 1161 | /* Stop. */ |
| 1162 | break; |
| 1163 | } |
| 1164 | } |
| 1165 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
| 1166 | else |
| 1167 | real_breakpoint = 1; |
| 1168 | #endif |
| 1169 | |
| 1170 | if (b->frame && b->frame != frame_address) |
| 1171 | bs->stop = 0; |
| 1172 | else |
| 1173 | { |
| 1174 | int value_is_zero = 0; |
| 1175 | |
| 1176 | if (b->cond) |
| 1177 | { |
| 1178 | /* Need to select the frame, with all that implies |
| 1179 | so that the conditions will have the right context. */ |
| 1180 | select_frame (get_current_frame (), 0); |
| 1181 | value_is_zero |
| 1182 | = catch_errors (breakpoint_cond_eval, (char *)(b->cond), |
| 1183 | "Error in testing breakpoint condition:\n", |
| 1184 | RETURN_MASK_ALL); |
| 1185 | /* FIXME-someday, should give breakpoint # */ |
| 1186 | free_all_values (); |
| 1187 | } |
| 1188 | if (b->cond && value_is_zero) |
| 1189 | { |
| 1190 | bs->stop = 0; |
| 1191 | } |
| 1192 | else if (b->ignore_count > 0) |
| 1193 | { |
| 1194 | b->ignore_count--; |
| 1195 | bs->stop = 0; |
| 1196 | } |
| 1197 | else |
| 1198 | { |
| 1199 | /* We will stop here */ |
| 1200 | if (b->disposition == disable) |
| 1201 | b->enable = disabled; |
| 1202 | bs->commands = b->commands; |
| 1203 | if (b->silent) |
| 1204 | bs->print = 0; |
| 1205 | if (bs->commands && STREQ ("silent", bs->commands->line)) |
| 1206 | { |
| 1207 | bs->commands = bs->commands->next; |
| 1208 | bs->print = 0; |
| 1209 | } |
| 1210 | } |
| 1211 | } |
| 1212 | /* Print nothing for this entry if we dont stop or if we dont print. */ |
| 1213 | if (bs->stop == 0 || bs->print == 0) |
| 1214 | bs->print_it = print_it_noop; |
| 1215 | } |
| 1216 | |
| 1217 | bs->next = NULL; /* Terminate the chain */ |
| 1218 | bs = root_bs->next; /* Re-grab the head of the chain */ |
| 1219 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
| 1220 | if (bs) |
| 1221 | { |
| 1222 | if (real_breakpoint) |
| 1223 | { |
| 1224 | *pc = bp_addr; |
| 1225 | #if defined (SHIFT_INST_REGS) |
| 1226 | SHIFT_INST_REGS(); |
| 1227 | #else /* No SHIFT_INST_REGS. */ |
| 1228 | write_pc (bp_addr); |
| 1229 | #endif /* No SHIFT_INST_REGS. */ |
| 1230 | } |
| 1231 | } |
| 1232 | #endif /* DECR_PC_AFTER_BREAK != 0. */ |
| 1233 | return bs; |
| 1234 | } |
| 1235 | \f |
| 1236 | /* Tell what to do about this bpstat. */ |
| 1237 | struct bpstat_what |
| 1238 | bpstat_what (bs) |
| 1239 | bpstat bs; |
| 1240 | { |
| 1241 | /* Classify each bpstat as one of the following. */ |
| 1242 | enum class { |
| 1243 | /* This bpstat element has no effect on the main_action. */ |
| 1244 | no_effect = 0, |
| 1245 | |
| 1246 | /* There was a watchpoint, stop but don't print. */ |
| 1247 | wp_silent, |
| 1248 | |
| 1249 | /* There was a watchpoint, stop and print. */ |
| 1250 | wp_noisy, |
| 1251 | |
| 1252 | /* There was a breakpoint but we're not stopping. */ |
| 1253 | bp_nostop, |
| 1254 | |
| 1255 | /* There was a breakpoint, stop but don't print. */ |
| 1256 | bp_silent, |
| 1257 | |
| 1258 | /* There was a breakpoint, stop and print. */ |
| 1259 | bp_noisy, |
| 1260 | |
| 1261 | /* We hit the longjmp breakpoint. */ |
| 1262 | long_jump, |
| 1263 | |
| 1264 | /* We hit the longjmp_resume breakpoint. */ |
| 1265 | long_resume, |
| 1266 | |
| 1267 | /* We hit the step_resume breakpoint. */ |
| 1268 | step_resume, |
| 1269 | |
| 1270 | /* This is just used to count how many enums there are. */ |
| 1271 | class_last |
| 1272 | }; |
| 1273 | |
| 1274 | /* Here is the table which drives this routine. So that we can |
| 1275 | format it pretty, we define some abbreviations for the |
| 1276 | enum bpstat_what codes. */ |
| 1277 | #define keep_c BPSTAT_WHAT_KEEP_CHECKING |
| 1278 | #define stop_s BPSTAT_WHAT_STOP_SILENT |
| 1279 | #define stop_n BPSTAT_WHAT_STOP_NOISY |
| 1280 | #define single BPSTAT_WHAT_SINGLE |
| 1281 | #define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME |
| 1282 | #define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME |
| 1283 | #define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE |
| 1284 | #define sr BPSTAT_WHAT_STEP_RESUME |
| 1285 | |
| 1286 | /* "Can't happen." Might want to print an error message. |
| 1287 | abort() is not out of the question, but chances are GDB is just |
| 1288 | a bit confused, not unusable. */ |
| 1289 | #define err BPSTAT_WHAT_STOP_NOISY |
| 1290 | |
| 1291 | /* Given an old action and a class, come up with a new action. */ |
| 1292 | /* One interesting property of this table is that wp_silent is the same |
| 1293 | as bp_silent and wp_noisy is the same as bp_noisy. That is because |
| 1294 | after stopping, the check for whether to step over a breakpoint |
| 1295 | (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without |
| 1296 | reference to how we stopped. We retain separate wp_silent and bp_silent |
| 1297 | codes in case we want to change that someday. */ |
| 1298 | |
| 1299 | /* step_resume entries: a step resume breakpoint overrides another |
| 1300 | breakpoint of signal handling (see comment in wait_for_inferior |
| 1301 | at first IN_SIGTRAMP where we set the step_resume breakpoint). */ |
| 1302 | |
| 1303 | static const enum bpstat_what_main_action |
| 1304 | table[(int)class_last][(int)BPSTAT_WHAT_LAST] = |
| 1305 | { |
| 1306 | /* old action */ |
| 1307 | /* keep_c stop_s stop_n single setlr clrlr clrlrs sr */ |
| 1308 | |
| 1309 | /*no_effect*/ {keep_c, stop_s, stop_n, single, setlr , clrlr , clrlrs, sr}, |
| 1310 | /*wp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s, sr}, |
| 1311 | /*wp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, sr}, |
| 1312 | /*bp_nostop*/ {single, stop_s, stop_n, single, setlr , clrlrs, clrlrs, sr}, |
| 1313 | /*bp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s, sr}, |
| 1314 | /*bp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, sr}, |
| 1315 | /*long_jump*/ {setlr , stop_s, stop_n, setlr , err , err , err , sr}, |
| 1316 | /*long_resume*/ {clrlr , stop_s, stop_n, clrlrs, err , err , err , sr}, |
| 1317 | /*step_resume*/ {sr , sr , sr , sr , sr , sr , sr , sr} |
| 1318 | }; |
| 1319 | #undef keep_c |
| 1320 | #undef stop_s |
| 1321 | #undef stop_n |
| 1322 | #undef single |
| 1323 | #undef setlr |
| 1324 | #undef clrlr |
| 1325 | #undef clrlrs |
| 1326 | #undef err |
| 1327 | enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; |
| 1328 | struct bpstat_what retval; |
| 1329 | |
| 1330 | retval.call_dummy = 0; |
| 1331 | for (; bs != NULL; bs = bs->next) |
| 1332 | { |
| 1333 | enum class bs_class = no_effect; |
| 1334 | if (bs->breakpoint_at == NULL) |
| 1335 | /* I suspect this can happen if it was a momentary breakpoint |
| 1336 | which has since been deleted. */ |
| 1337 | continue; |
| 1338 | switch (bs->breakpoint_at->type) |
| 1339 | { |
| 1340 | case bp_breakpoint: |
| 1341 | case bp_until: |
| 1342 | case bp_finish: |
| 1343 | if (bs->stop) |
| 1344 | { |
| 1345 | if (bs->print) |
| 1346 | bs_class = bp_noisy; |
| 1347 | else |
| 1348 | bs_class = bp_silent; |
| 1349 | } |
| 1350 | else |
| 1351 | bs_class = bp_nostop; |
| 1352 | break; |
| 1353 | case bp_watchpoint: |
| 1354 | if (bs->stop) |
| 1355 | { |
| 1356 | if (bs->print) |
| 1357 | bs_class = wp_noisy; |
| 1358 | else |
| 1359 | bs_class = wp_silent; |
| 1360 | } |
| 1361 | else |
| 1362 | /* There was a watchpoint, but we're not stopping. This requires |
| 1363 | no further action. */ |
| 1364 | bs_class = no_effect; |
| 1365 | break; |
| 1366 | case bp_longjmp: |
| 1367 | bs_class = long_jump; |
| 1368 | break; |
| 1369 | case bp_longjmp_resume: |
| 1370 | bs_class = long_resume; |
| 1371 | break; |
| 1372 | case bp_step_resume: |
| 1373 | #if 0 |
| 1374 | /* Need to temporarily disable this until we can fix the bug |
| 1375 | with nexting over a breakpoint with ->stop clear causing |
| 1376 | an infinite loop. For now, treat the breakpoint as having |
| 1377 | been hit even if the frame is wrong. */ |
| 1378 | if (bs->stop) |
| 1379 | { |
| 1380 | #endif |
| 1381 | bs_class = step_resume; |
| 1382 | #if 0 |
| 1383 | } |
| 1384 | else |
| 1385 | /* It is for the wrong frame. */ |
| 1386 | bs_class = bp_nostop; |
| 1387 | #endif |
| 1388 | break; |
| 1389 | case bp_call_dummy: |
| 1390 | /* Make sure the action is stop (silent or noisy), so infrun.c |
| 1391 | pops the dummy frame. */ |
| 1392 | bs_class = bp_silent; |
| 1393 | retval.call_dummy = 1; |
| 1394 | break; |
| 1395 | } |
| 1396 | current_action = table[(int)bs_class][(int)current_action]; |
| 1397 | } |
| 1398 | retval.main_action = current_action; |
| 1399 | return retval; |
| 1400 | } |
| 1401 | |
| 1402 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
| 1403 | without hardware support). This isn't related to a specific bpstat, |
| 1404 | just to things like whether watchpoints are set. */ |
| 1405 | |
| 1406 | int |
| 1407 | bpstat_should_step () |
| 1408 | { |
| 1409 | struct breakpoint *b; |
| 1410 | ALL_BREAKPOINTS (b) |
| 1411 | if (b->enable == enabled && b->type == bp_watchpoint) |
| 1412 | return 1; |
| 1413 | return 0; |
| 1414 | } |
| 1415 | \f |
| 1416 | /* Print information on breakpoint number BNUM, or -1 if all. |
| 1417 | If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS |
| 1418 | is nonzero, process only watchpoints. */ |
| 1419 | |
| 1420 | static void |
| 1421 | breakpoint_1 (bnum, allflag) |
| 1422 | int bnum; |
| 1423 | int allflag; |
| 1424 | { |
| 1425 | register struct breakpoint *b; |
| 1426 | register struct command_line *l; |
| 1427 | register struct symbol *sym; |
| 1428 | CORE_ADDR last_addr = (CORE_ADDR)-1; |
| 1429 | int found_a_breakpoint = 0; |
| 1430 | static char *bptypes[] = {"breakpoint", "until", "finish", "watchpoint", |
| 1431 | "longjmp", "longjmp resume", "step resume", |
| 1432 | "call dummy" }; |
| 1433 | static char *bpdisps[] = {"del", "dis", "keep"}; |
| 1434 | static char bpenables[] = "ny"; |
| 1435 | char wrap_indent[80]; |
| 1436 | |
| 1437 | ALL_BREAKPOINTS (b) |
| 1438 | if (bnum == -1 |
| 1439 | || bnum == b->number) |
| 1440 | { |
| 1441 | /* We only print out user settable breakpoints unless the allflag is set. */ |
| 1442 | if (!allflag |
| 1443 | && b->type != bp_breakpoint |
| 1444 | && b->type != bp_watchpoint) |
| 1445 | continue; |
| 1446 | |
| 1447 | if (!found_a_breakpoint++) |
| 1448 | printf_filtered ("Num Type Disp Enb %sWhat\n", |
| 1449 | addressprint ? "Address " : ""); |
| 1450 | |
| 1451 | printf_filtered ("%-3d %-14s %-4s %-3c ", |
| 1452 | b->number, |
| 1453 | bptypes[(int)b->type], |
| 1454 | bpdisps[(int)b->disposition], |
| 1455 | bpenables[(int)b->enable]); |
| 1456 | strcpy (wrap_indent, " "); |
| 1457 | if (addressprint) |
| 1458 | strcat (wrap_indent, " "); |
| 1459 | switch (b->type) |
| 1460 | { |
| 1461 | case bp_watchpoint: |
| 1462 | print_expression (b->exp, gdb_stdout); |
| 1463 | break; |
| 1464 | |
| 1465 | case bp_breakpoint: |
| 1466 | case bp_until: |
| 1467 | case bp_finish: |
| 1468 | case bp_longjmp: |
| 1469 | case bp_longjmp_resume: |
| 1470 | case bp_step_resume: |
| 1471 | case bp_call_dummy: |
| 1472 | if (addressprint) |
| 1473 | printf_filtered ("%s ", local_hex_string_custom ((unsigned long) b->address, "08l")); |
| 1474 | |
| 1475 | last_addr = b->address; |
| 1476 | if (b->source_file) |
| 1477 | { |
| 1478 | sym = find_pc_function (b->address); |
| 1479 | if (sym) |
| 1480 | { |
| 1481 | fputs_filtered ("in ", gdb_stdout); |
| 1482 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout); |
| 1483 | wrap_here (wrap_indent); |
| 1484 | fputs_filtered (" at ", gdb_stdout); |
| 1485 | } |
| 1486 | fputs_filtered (b->source_file, gdb_stdout); |
| 1487 | printf_filtered (":%d", b->line_number); |
| 1488 | } |
| 1489 | else |
| 1490 | print_address_symbolic (b->address, gdb_stdout, demangle, " "); |
| 1491 | break; |
| 1492 | } |
| 1493 | |
| 1494 | printf_filtered ("\n"); |
| 1495 | |
| 1496 | if (b->frame) |
| 1497 | { |
| 1498 | printf_filtered ("\tstop only in stack frame at "); |
| 1499 | print_address_numeric (b->frame, gdb_stdout); |
| 1500 | printf_filtered ("\n"); |
| 1501 | if (b->cond) |
| 1502 | { |
| 1503 | printf_filtered ("\tstop only if "); |
| 1504 | print_expression (b->cond, gdb_stdout); |
| 1505 | printf_filtered ("\n"); |
| 1506 | } |
| 1507 | if (b->ignore_count) |
| 1508 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); |
| 1509 | if ((l = b->commands)) |
| 1510 | while (l) |
| 1511 | { |
| 1512 | fputs_filtered ("\t", gdb_stdout); |
| 1513 | fputs_filtered (l->line, gdb_stdout); |
| 1514 | fputs_filtered ("\n", gdb_stdout); |
| 1515 | l = l->next; |
| 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | if (!found_a_breakpoint) |
| 1520 | { |
| 1521 | if (bnum == -1) |
| 1522 | printf_filtered ("No breakpoints or watchpoints.\n"); |
| 1523 | else |
| 1524 | printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum); |
| 1525 | } |
| 1526 | else |
| 1527 | /* Compare against (CORE_ADDR)-1 in case some compiler decides |
| 1528 | that a comparison of an unsigned with -1 is always false. */ |
| 1529 | if (last_addr != (CORE_ADDR)-1) |
| 1530 | set_next_address (last_addr); |
| 1531 | } |
| 1532 | |
| 1533 | /* ARGSUSED */ |
| 1534 | static void |
| 1535 | breakpoints_info (bnum_exp, from_tty) |
| 1536 | char *bnum_exp; |
| 1537 | int from_tty; |
| 1538 | { |
| 1539 | int bnum = -1; |
| 1540 | |
| 1541 | if (bnum_exp) |
| 1542 | bnum = parse_and_eval_address (bnum_exp); |
| 1543 | |
| 1544 | breakpoint_1 (bnum, 0); |
| 1545 | } |
| 1546 | |
| 1547 | #if MAINTENANCE_CMDS |
| 1548 | |
| 1549 | /* ARGSUSED */ |
| 1550 | static void |
| 1551 | maintenance_info_breakpoints (bnum_exp, from_tty) |
| 1552 | char *bnum_exp; |
| 1553 | int from_tty; |
| 1554 | { |
| 1555 | int bnum = -1; |
| 1556 | |
| 1557 | if (bnum_exp) |
| 1558 | bnum = parse_and_eval_address (bnum_exp); |
| 1559 | |
| 1560 | breakpoint_1 (bnum, 1); |
| 1561 | } |
| 1562 | |
| 1563 | #endif |
| 1564 | |
| 1565 | /* Print a message describing any breakpoints set at PC. */ |
| 1566 | |
| 1567 | static void |
| 1568 | describe_other_breakpoints (pc) |
| 1569 | register CORE_ADDR pc; |
| 1570 | { |
| 1571 | register int others = 0; |
| 1572 | register struct breakpoint *b; |
| 1573 | |
| 1574 | ALL_BREAKPOINTS (b) |
| 1575 | if (b->address == pc) |
| 1576 | others++; |
| 1577 | if (others > 0) |
| 1578 | { |
| 1579 | printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); |
| 1580 | ALL_BREAKPOINTS (b) |
| 1581 | if (b->address == pc) |
| 1582 | { |
| 1583 | others--; |
| 1584 | printf_filtered |
| 1585 | ("%d%s%s ", |
| 1586 | b->number, |
| 1587 | (b->enable == disabled) ? " (disabled)" : "", |
| 1588 | (others > 1) ? "," : ((others == 1) ? " and" : "")); |
| 1589 | } |
| 1590 | printf_filtered ("also set at pc "); |
| 1591 | print_address_numeric (pc, gdb_stdout); |
| 1592 | printf_filtered (".\n"); |
| 1593 | } |
| 1594 | } |
| 1595 | \f |
| 1596 | /* Set the default place to put a breakpoint |
| 1597 | for the `break' command with no arguments. */ |
| 1598 | |
| 1599 | void |
| 1600 | set_default_breakpoint (valid, addr, symtab, line) |
| 1601 | int valid; |
| 1602 | CORE_ADDR addr; |
| 1603 | struct symtab *symtab; |
| 1604 | int line; |
| 1605 | { |
| 1606 | default_breakpoint_valid = valid; |
| 1607 | default_breakpoint_address = addr; |
| 1608 | default_breakpoint_symtab = symtab; |
| 1609 | default_breakpoint_line = line; |
| 1610 | } |
| 1611 | |
| 1612 | /* Rescan breakpoints at address ADDRESS, |
| 1613 | marking the first one as "first" and any others as "duplicates". |
| 1614 | This is so that the bpt instruction is only inserted once. */ |
| 1615 | |
| 1616 | static void |
| 1617 | check_duplicates (address) |
| 1618 | CORE_ADDR address; |
| 1619 | { |
| 1620 | register struct breakpoint *b; |
| 1621 | register int count = 0; |
| 1622 | |
| 1623 | if (address == 0) /* Watchpoints are uninteresting */ |
| 1624 | return; |
| 1625 | |
| 1626 | ALL_BREAKPOINTS (b) |
| 1627 | if (b->enable != disabled && b->address == address) |
| 1628 | { |
| 1629 | count++; |
| 1630 | b->duplicate = count > 1; |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | /* Low level routine to set a breakpoint. |
| 1635 | Takes as args the three things that every breakpoint must have. |
| 1636 | Returns the breakpoint object so caller can set other things. |
| 1637 | Does not set the breakpoint number! |
| 1638 | Does not print anything. |
| 1639 | |
| 1640 | ==> This routine should not be called if there is a chance of later |
| 1641 | error(); otherwise it leaves a bogus breakpoint on the chain. Validate |
| 1642 | your arguments BEFORE calling this routine! */ |
| 1643 | |
| 1644 | static struct breakpoint * |
| 1645 | set_raw_breakpoint (sal) |
| 1646 | struct symtab_and_line sal; |
| 1647 | { |
| 1648 | register struct breakpoint *b, *b1; |
| 1649 | |
| 1650 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); |
| 1651 | memset (b, 0, sizeof (*b)); |
| 1652 | b->address = sal.pc; |
| 1653 | if (sal.symtab == NULL) |
| 1654 | b->source_file = NULL; |
| 1655 | else |
| 1656 | b->source_file = savestring (sal.symtab->filename, |
| 1657 | strlen (sal.symtab->filename)); |
| 1658 | b->thread = -1; |
| 1659 | b->line_number = sal.line; |
| 1660 | b->enable = enabled; |
| 1661 | b->next = 0; |
| 1662 | b->silent = 0; |
| 1663 | b->ignore_count = 0; |
| 1664 | b->commands = NULL; |
| 1665 | b->frame = 0; |
| 1666 | |
| 1667 | /* Add this breakpoint to the end of the chain |
| 1668 | so that a list of breakpoints will come out in order |
| 1669 | of increasing numbers. */ |
| 1670 | |
| 1671 | b1 = breakpoint_chain; |
| 1672 | if (b1 == 0) |
| 1673 | breakpoint_chain = b; |
| 1674 | else |
| 1675 | { |
| 1676 | while (b1->next) |
| 1677 | b1 = b1->next; |
| 1678 | b1->next = b; |
| 1679 | } |
| 1680 | |
| 1681 | check_duplicates (sal.pc); |
| 1682 | |
| 1683 | return b; |
| 1684 | } |
| 1685 | |
| 1686 | static void |
| 1687 | create_longjmp_breakpoint(func_name) |
| 1688 | char *func_name; |
| 1689 | { |
| 1690 | struct symtab_and_line sal; |
| 1691 | struct breakpoint *b; |
| 1692 | static int internal_breakpoint_number = -1; |
| 1693 | |
| 1694 | if (func_name != NULL) |
| 1695 | { |
| 1696 | struct minimal_symbol *m; |
| 1697 | |
| 1698 | m = lookup_minimal_symbol(func_name, (struct objfile *)NULL); |
| 1699 | if (m) |
| 1700 | sal.pc = SYMBOL_VALUE_ADDRESS (m); |
| 1701 | else |
| 1702 | return; |
| 1703 | } |
| 1704 | else |
| 1705 | sal.pc = 0; |
| 1706 | |
| 1707 | sal.symtab = NULL; |
| 1708 | sal.line = 0; |
| 1709 | |
| 1710 | b = set_raw_breakpoint(sal); |
| 1711 | if (!b) return; |
| 1712 | |
| 1713 | b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume; |
| 1714 | b->disposition = donttouch; |
| 1715 | b->enable = disabled; |
| 1716 | b->silent = 1; |
| 1717 | if (func_name) |
| 1718 | b->addr_string = strsave(func_name); |
| 1719 | b->number = internal_breakpoint_number--; |
| 1720 | } |
| 1721 | |
| 1722 | /* Call this routine when stepping and nexting to enable a breakpoint if we do |
| 1723 | a longjmp(). When we hit that breakpoint, call |
| 1724 | set_longjmp_resume_breakpoint() to figure out where we are going. */ |
| 1725 | |
| 1726 | void |
| 1727 | enable_longjmp_breakpoint() |
| 1728 | { |
| 1729 | register struct breakpoint *b; |
| 1730 | |
| 1731 | ALL_BREAKPOINTS (b) |
| 1732 | if (b->type == bp_longjmp) |
| 1733 | { |
| 1734 | b->enable = enabled; |
| 1735 | check_duplicates (b->address); |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | void |
| 1740 | disable_longjmp_breakpoint() |
| 1741 | { |
| 1742 | register struct breakpoint *b; |
| 1743 | |
| 1744 | ALL_BREAKPOINTS (b) |
| 1745 | if ( b->type == bp_longjmp |
| 1746 | || b->type == bp_longjmp_resume) |
| 1747 | { |
| 1748 | b->enable = disabled; |
| 1749 | check_duplicates (b->address); |
| 1750 | } |
| 1751 | } |
| 1752 | |
| 1753 | /* Call this after hitting the longjmp() breakpoint. Use this to set a new |
| 1754 | breakpoint at the target of the jmp_buf. |
| 1755 | |
| 1756 | FIXME - This ought to be done by setting a temporary breakpoint that gets |
| 1757 | deleted automatically... |
| 1758 | */ |
| 1759 | |
| 1760 | void |
| 1761 | set_longjmp_resume_breakpoint(pc, frame) |
| 1762 | CORE_ADDR pc; |
| 1763 | FRAME frame; |
| 1764 | { |
| 1765 | register struct breakpoint *b; |
| 1766 | |
| 1767 | ALL_BREAKPOINTS (b) |
| 1768 | if (b->type == bp_longjmp_resume) |
| 1769 | { |
| 1770 | b->address = pc; |
| 1771 | b->enable = enabled; |
| 1772 | if (frame != NULL) |
| 1773 | b->frame = FRAME_FP(frame); |
| 1774 | else |
| 1775 | b->frame = 0; |
| 1776 | check_duplicates (b->address); |
| 1777 | return; |
| 1778 | } |
| 1779 | } |
| 1780 | |
| 1781 | /* Set a breakpoint that will evaporate an end of command |
| 1782 | at address specified by SAL. |
| 1783 | Restrict it to frame FRAME if FRAME is nonzero. */ |
| 1784 | |
| 1785 | struct breakpoint * |
| 1786 | set_momentary_breakpoint (sal, frame, type) |
| 1787 | struct symtab_and_line sal; |
| 1788 | FRAME frame; |
| 1789 | enum bptype type; |
| 1790 | { |
| 1791 | register struct breakpoint *b; |
| 1792 | b = set_raw_breakpoint (sal); |
| 1793 | b->type = type; |
| 1794 | b->enable = enabled; |
| 1795 | b->disposition = donttouch; |
| 1796 | b->frame = (frame ? FRAME_FP (frame) : 0); |
| 1797 | return b; |
| 1798 | } |
| 1799 | |
| 1800 | #if 0 |
| 1801 | void |
| 1802 | clear_momentary_breakpoints () |
| 1803 | { |
| 1804 | register struct breakpoint *b; |
| 1805 | ALL_BREAKPOINTS (b) |
| 1806 | if (b->disposition == delete) |
| 1807 | { |
| 1808 | delete_breakpoint (b); |
| 1809 | break; |
| 1810 | } |
| 1811 | } |
| 1812 | #endif |
| 1813 | \f |
| 1814 | /* Tell the user we have just set a breakpoint B. */ |
| 1815 | static void |
| 1816 | mention (b) |
| 1817 | struct breakpoint *b; |
| 1818 | { |
| 1819 | switch (b->type) |
| 1820 | { |
| 1821 | case bp_watchpoint: |
| 1822 | printf_filtered ("Watchpoint %d: ", b->number); |
| 1823 | print_expression (b->exp, gdb_stdout); |
| 1824 | break; |
| 1825 | case bp_breakpoint: |
| 1826 | printf_filtered ("Breakpoint %d at ", b->number); |
| 1827 | print_address_numeric (b->address); |
| 1828 | if (b->source_file) |
| 1829 | printf_filtered (": file %s, line %d.", |
| 1830 | b->source_file, b->line_number); |
| 1831 | break; |
| 1832 | case bp_until: |
| 1833 | case bp_finish: |
| 1834 | case bp_longjmp: |
| 1835 | case bp_longjmp_resume: |
| 1836 | case bp_step_resume: |
| 1837 | case bp_call_dummy: |
| 1838 | break; |
| 1839 | } |
| 1840 | printf_filtered ("\n"); |
| 1841 | } |
| 1842 | |
| 1843 | #if 0 |
| 1844 | /* Nobody calls this currently. */ |
| 1845 | /* Set a breakpoint from a symtab and line. |
| 1846 | If TEMPFLAG is nonzero, it is a temporary breakpoint. |
| 1847 | ADDR_STRING is a malloc'd string holding the name of where we are |
| 1848 | setting the breakpoint. This is used later to re-set it after the |
| 1849 | program is relinked and symbols are reloaded. |
| 1850 | Print the same confirmation messages that the breakpoint command prints. */ |
| 1851 | |
| 1852 | void |
| 1853 | set_breakpoint (s, line, tempflag, addr_string) |
| 1854 | struct symtab *s; |
| 1855 | int line; |
| 1856 | int tempflag; |
| 1857 | char *addr_string; |
| 1858 | { |
| 1859 | register struct breakpoint *b; |
| 1860 | struct symtab_and_line sal; |
| 1861 | |
| 1862 | sal.symtab = s; |
| 1863 | sal.line = line; |
| 1864 | sal.pc = 0; |
| 1865 | resolve_sal_pc (&sal); /* Might error out */ |
| 1866 | describe_other_breakpoints (sal.pc); |
| 1867 | |
| 1868 | b = set_raw_breakpoint (sal); |
| 1869 | set_breakpoint_count (breakpoint_count + 1); |
| 1870 | b->number = breakpoint_count; |
| 1871 | b->type = bp_breakpoint; |
| 1872 | b->cond = 0; |
| 1873 | b->addr_string = addr_string; |
| 1874 | b->enable = enabled; |
| 1875 | b->disposition = tempflag ? delete : donttouch; |
| 1876 | |
| 1877 | mention (b); |
| 1878 | } |
| 1879 | #endif /* 0 */ |
| 1880 | \f |
| 1881 | /* Set a breakpoint according to ARG (function, linenum or *address) |
| 1882 | and make it temporary if TEMPFLAG is nonzero. */ |
| 1883 | |
| 1884 | static void |
| 1885 | break_command_1 (arg, tempflag, from_tty) |
| 1886 | char *arg; |
| 1887 | int tempflag, from_tty; |
| 1888 | { |
| 1889 | struct symtabs_and_lines sals; |
| 1890 | struct symtab_and_line sal; |
| 1891 | register struct expression *cond = 0; |
| 1892 | register struct breakpoint *b; |
| 1893 | |
| 1894 | /* Pointers in arg to the start, and one past the end, of the condition. */ |
| 1895 | char *cond_start = NULL; |
| 1896 | char *cond_end = NULL; |
| 1897 | /* Pointers in arg to the start, and one past the end, |
| 1898 | of the address part. */ |
| 1899 | char *addr_start = NULL; |
| 1900 | char *addr_end = NULL; |
| 1901 | struct cleanup *old_chain; |
| 1902 | struct cleanup *canonical_strings_chain = NULL; |
| 1903 | char **canonical = (char **)NULL; |
| 1904 | int i; |
| 1905 | int thread; |
| 1906 | |
| 1907 | sals.sals = NULL; |
| 1908 | sals.nelts = 0; |
| 1909 | |
| 1910 | sal.line = sal.pc = sal.end = 0; |
| 1911 | sal.symtab = 0; |
| 1912 | |
| 1913 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ |
| 1914 | |
| 1915 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' |
| 1916 | && (arg[2] == ' ' || arg[2] == '\t'))) |
| 1917 | { |
| 1918 | if (default_breakpoint_valid) |
| 1919 | { |
| 1920 | sals.sals = (struct symtab_and_line *) |
| 1921 | xmalloc (sizeof (struct symtab_and_line)); |
| 1922 | sal.pc = default_breakpoint_address; |
| 1923 | sal.line = default_breakpoint_line; |
| 1924 | sal.symtab = default_breakpoint_symtab; |
| 1925 | sals.sals[0] = sal; |
| 1926 | sals.nelts = 1; |
| 1927 | } |
| 1928 | else |
| 1929 | error ("No default breakpoint address now."); |
| 1930 | } |
| 1931 | else |
| 1932 | { |
| 1933 | addr_start = arg; |
| 1934 | |
| 1935 | /* Force almost all breakpoints to be in terms of the |
| 1936 | current_source_symtab (which is decode_line_1's default). This |
| 1937 | should produce the results we want almost all of the time while |
| 1938 | leaving default_breakpoint_* alone. */ |
| 1939 | if (default_breakpoint_valid |
| 1940 | && (!current_source_symtab |
| 1941 | || (arg && (*arg == '+' || *arg == '-')))) |
| 1942 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| 1943 | default_breakpoint_line, &canonical); |
| 1944 | else |
| 1945 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical); |
| 1946 | |
| 1947 | addr_end = arg; |
| 1948 | } |
| 1949 | |
| 1950 | if (! sals.nelts) |
| 1951 | return; |
| 1952 | |
| 1953 | /* Make sure that all storage allocated in decode_line_1 gets freed in case |
| 1954 | the following `for' loop errors out. */ |
| 1955 | old_chain = make_cleanup (free, sals.sals); |
| 1956 | if (canonical != (char **)NULL) |
| 1957 | { |
| 1958 | make_cleanup (free, canonical); |
| 1959 | canonical_strings_chain = make_cleanup (null_cleanup, 0); |
| 1960 | for (i = 0; i < sals.nelts; i++) |
| 1961 | { |
| 1962 | if (canonical[i] != NULL) |
| 1963 | make_cleanup (free, canonical[i]); |
| 1964 | } |
| 1965 | } |
| 1966 | |
| 1967 | thread = -1; /* No specific thread yet */ |
| 1968 | |
| 1969 | /* Resolve all line numbers to PC's, and verify that conditions |
| 1970 | can be parsed, before setting any breakpoints. */ |
| 1971 | for (i = 0; i < sals.nelts; i++) |
| 1972 | { |
| 1973 | char *tok, *end_tok; |
| 1974 | int toklen; |
| 1975 | |
| 1976 | resolve_sal_pc (&sals.sals[i]); |
| 1977 | |
| 1978 | tok = arg; |
| 1979 | |
| 1980 | while (tok && *tok) |
| 1981 | { |
| 1982 | while (*tok == ' ' || *tok == '\t') |
| 1983 | tok++; |
| 1984 | |
| 1985 | end_tok = tok; |
| 1986 | |
| 1987 | while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') |
| 1988 | end_tok++; |
| 1989 | |
| 1990 | toklen = end_tok - tok; |
| 1991 | |
| 1992 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) |
| 1993 | { |
| 1994 | tok = cond_start = end_tok + 1; |
| 1995 | cond = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); |
| 1996 | cond_end = tok; |
| 1997 | } |
| 1998 | else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) |
| 1999 | { |
| 2000 | char *tmptok; |
| 2001 | |
| 2002 | tok = end_tok + 1; |
| 2003 | tmptok = tok; |
| 2004 | thread = strtol (tok, &tok, 0); |
| 2005 | if (tok == tmptok) |
| 2006 | error ("Junk after thread keyword."); |
| 2007 | if (!valid_thread_id (thread)) |
| 2008 | error ("Unknown thread %d\n", thread); |
| 2009 | } |
| 2010 | else |
| 2011 | error ("Junk at end of arguments."); |
| 2012 | } |
| 2013 | } |
| 2014 | |
| 2015 | /* Remove the canonical strings from the cleanup, they are needed below. */ |
| 2016 | if (canonical != (char **)NULL) |
| 2017 | discard_cleanups (canonical_strings_chain); |
| 2018 | |
| 2019 | /* Now set all the breakpoints. */ |
| 2020 | for (i = 0; i < sals.nelts; i++) |
| 2021 | { |
| 2022 | sal = sals.sals[i]; |
| 2023 | |
| 2024 | if (from_tty) |
| 2025 | describe_other_breakpoints (sal.pc); |
| 2026 | |
| 2027 | b = set_raw_breakpoint (sal); |
| 2028 | set_breakpoint_count (breakpoint_count + 1); |
| 2029 | b->number = breakpoint_count; |
| 2030 | b->type = bp_breakpoint; |
| 2031 | b->cond = cond; |
| 2032 | b->thread = thread; |
| 2033 | |
| 2034 | /* If a canonical line spec is needed use that instead of the |
| 2035 | command string. */ |
| 2036 | if (canonical != (char **)NULL && canonical[i] != NULL) |
| 2037 | b->addr_string = canonical[i]; |
| 2038 | else if (addr_start) |
| 2039 | b->addr_string = savestring (addr_start, addr_end - addr_start); |
| 2040 | if (cond_start) |
| 2041 | b->cond_string = savestring (cond_start, cond_end - cond_start); |
| 2042 | |
| 2043 | b->enable = enabled; |
| 2044 | b->disposition = tempflag ? delete : donttouch; |
| 2045 | |
| 2046 | mention (b); |
| 2047 | } |
| 2048 | |
| 2049 | if (sals.nelts > 1) |
| 2050 | { |
| 2051 | printf_filtered ("Multiple breakpoints were set.\n"); |
| 2052 | printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); |
| 2053 | } |
| 2054 | do_cleanups (old_chain); |
| 2055 | } |
| 2056 | |
| 2057 | /* Helper function for break_command_1 and disassemble_command. */ |
| 2058 | |
| 2059 | void |
| 2060 | resolve_sal_pc (sal) |
| 2061 | struct symtab_and_line *sal; |
| 2062 | { |
| 2063 | CORE_ADDR pc; |
| 2064 | |
| 2065 | if (sal->pc == 0 && sal->symtab != 0) |
| 2066 | { |
| 2067 | pc = find_line_pc (sal->symtab, sal->line); |
| 2068 | if (pc == 0) |
| 2069 | error ("No line %d in file \"%s\".", |
| 2070 | sal->line, sal->symtab->filename); |
| 2071 | sal->pc = pc; |
| 2072 | } |
| 2073 | } |
| 2074 | |
| 2075 | void |
| 2076 | break_command (arg, from_tty) |
| 2077 | char *arg; |
| 2078 | int from_tty; |
| 2079 | { |
| 2080 | break_command_1 (arg, 0, from_tty); |
| 2081 | } |
| 2082 | |
| 2083 | static void |
| 2084 | tbreak_command (arg, from_tty) |
| 2085 | char *arg; |
| 2086 | int from_tty; |
| 2087 | { |
| 2088 | break_command_1 (arg, 1, from_tty); |
| 2089 | } |
| 2090 | |
| 2091 | /* ARGSUSED */ |
| 2092 | static void |
| 2093 | watch_command (arg, from_tty) |
| 2094 | char *arg; |
| 2095 | int from_tty; |
| 2096 | { |
| 2097 | struct breakpoint *b; |
| 2098 | struct symtab_and_line sal; |
| 2099 | struct expression *exp; |
| 2100 | struct block *exp_valid_block; |
| 2101 | struct value *val; |
| 2102 | |
| 2103 | sal.pc = 0; |
| 2104 | sal.symtab = NULL; |
| 2105 | sal.line = 0; |
| 2106 | |
| 2107 | /* Parse arguments. */ |
| 2108 | innermost_block = NULL; |
| 2109 | exp = parse_expression (arg); |
| 2110 | exp_valid_block = innermost_block; |
| 2111 | val = evaluate_expression (exp); |
| 2112 | release_value (val); |
| 2113 | if (VALUE_LAZY (val)) |
| 2114 | value_fetch_lazy (val); |
| 2115 | |
| 2116 | /* Now set up the breakpoint. */ |
| 2117 | b = set_raw_breakpoint (sal); |
| 2118 | set_breakpoint_count (breakpoint_count + 1); |
| 2119 | b->number = breakpoint_count; |
| 2120 | b->type = bp_watchpoint; |
| 2121 | b->disposition = donttouch; |
| 2122 | b->exp = exp; |
| 2123 | b->exp_valid_block = exp_valid_block; |
| 2124 | b->val = val; |
| 2125 | b->cond = 0; |
| 2126 | b->cond_string = NULL; |
| 2127 | b->exp_string = savestring (arg, strlen (arg)); |
| 2128 | mention (b); |
| 2129 | } |
| 2130 | \f |
| 2131 | /* |
| 2132 | * Helper routine for the until_command routine in infcmd.c. Here |
| 2133 | * because it uses the mechanisms of breakpoints. |
| 2134 | */ |
| 2135 | /* ARGSUSED */ |
| 2136 | void |
| 2137 | until_break_command (arg, from_tty) |
| 2138 | char *arg; |
| 2139 | int from_tty; |
| 2140 | { |
| 2141 | struct symtabs_and_lines sals; |
| 2142 | struct symtab_and_line sal; |
| 2143 | FRAME prev_frame = get_prev_frame (selected_frame); |
| 2144 | struct breakpoint *breakpoint; |
| 2145 | struct cleanup *old_chain; |
| 2146 | |
| 2147 | clear_proceed_status (); |
| 2148 | |
| 2149 | /* Set a breakpoint where the user wants it and at return from |
| 2150 | this function */ |
| 2151 | |
| 2152 | if (default_breakpoint_valid) |
| 2153 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| 2154 | default_breakpoint_line, (char ***)NULL); |
| 2155 | else |
| 2156 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL); |
| 2157 | |
| 2158 | if (sals.nelts != 1) |
| 2159 | error ("Couldn't get information on specified line."); |
| 2160 | |
| 2161 | sal = sals.sals[0]; |
| 2162 | free ((PTR)sals.sals); /* malloc'd, so freed */ |
| 2163 | |
| 2164 | if (*arg) |
| 2165 | error ("Junk at end of arguments."); |
| 2166 | |
| 2167 | resolve_sal_pc (&sal); |
| 2168 | |
| 2169 | breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); |
| 2170 | |
| 2171 | old_chain = make_cleanup(delete_breakpoint, breakpoint); |
| 2172 | |
| 2173 | /* Keep within the current frame */ |
| 2174 | |
| 2175 | if (prev_frame) |
| 2176 | { |
| 2177 | struct frame_info *fi; |
| 2178 | |
| 2179 | fi = get_frame_info (prev_frame); |
| 2180 | sal = find_pc_line (fi->pc, 0); |
| 2181 | sal.pc = fi->pc; |
| 2182 | breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); |
| 2183 | make_cleanup(delete_breakpoint, breakpoint); |
| 2184 | } |
| 2185 | |
| 2186 | proceed (-1, TARGET_SIGNAL_DEFAULT, 0); |
| 2187 | do_cleanups(old_chain); |
| 2188 | } |
| 2189 | \f |
| 2190 | #if 0 |
| 2191 | /* These aren't used; I don't konw what they were for. */ |
| 2192 | /* Set a breakpoint at the catch clause for NAME. */ |
| 2193 | static int |
| 2194 | catch_breakpoint (name) |
| 2195 | char *name; |
| 2196 | { |
| 2197 | } |
| 2198 | |
| 2199 | static int |
| 2200 | disable_catch_breakpoint () |
| 2201 | { |
| 2202 | } |
| 2203 | |
| 2204 | static int |
| 2205 | delete_catch_breakpoint () |
| 2206 | { |
| 2207 | } |
| 2208 | |
| 2209 | static int |
| 2210 | enable_catch_breakpoint () |
| 2211 | { |
| 2212 | } |
| 2213 | #endif /* 0 */ |
| 2214 | |
| 2215 | struct sal_chain |
| 2216 | { |
| 2217 | struct sal_chain *next; |
| 2218 | struct symtab_and_line sal; |
| 2219 | }; |
| 2220 | |
| 2221 | #if 0 |
| 2222 | /* This isn't used; I don't know what it was for. */ |
| 2223 | /* For each catch clause identified in ARGS, run FUNCTION |
| 2224 | with that clause as an argument. */ |
| 2225 | static struct symtabs_and_lines |
| 2226 | map_catch_names (args, function) |
| 2227 | char *args; |
| 2228 | int (*function)(); |
| 2229 | { |
| 2230 | register char *p = args; |
| 2231 | register char *p1; |
| 2232 | struct symtabs_and_lines sals; |
| 2233 | #if 0 |
| 2234 | struct sal_chain *sal_chain = 0; |
| 2235 | #endif |
| 2236 | |
| 2237 | if (p == 0) |
| 2238 | error_no_arg ("one or more catch names"); |
| 2239 | |
| 2240 | sals.nelts = 0; |
| 2241 | sals.sals = NULL; |
| 2242 | |
| 2243 | while (*p) |
| 2244 | { |
| 2245 | p1 = p; |
| 2246 | /* Don't swallow conditional part. */ |
| 2247 | if (p1[0] == 'i' && p1[1] == 'f' |
| 2248 | && (p1[2] == ' ' || p1[2] == '\t')) |
| 2249 | break; |
| 2250 | |
| 2251 | if (isalpha (*p1)) |
| 2252 | { |
| 2253 | p1++; |
| 2254 | while (isalnum (*p1) || *p1 == '_' || *p1 == '$') |
| 2255 | p1++; |
| 2256 | } |
| 2257 | |
| 2258 | if (*p1 && *p1 != ' ' && *p1 != '\t') |
| 2259 | error ("Arguments must be catch names."); |
| 2260 | |
| 2261 | *p1 = 0; |
| 2262 | #if 0 |
| 2263 | if (function (p)) |
| 2264 | { |
| 2265 | struct sal_chain *next |
| 2266 | = (struct sal_chain *)alloca (sizeof (struct sal_chain)); |
| 2267 | next->next = sal_chain; |
| 2268 | next->sal = get_catch_sal (p); |
| 2269 | sal_chain = next; |
| 2270 | goto win; |
| 2271 | } |
| 2272 | #endif |
| 2273 | printf_unfiltered ("No catch clause for exception %s.\n", p); |
| 2274 | #if 0 |
| 2275 | win: |
| 2276 | #endif |
| 2277 | p = p1; |
| 2278 | while (*p == ' ' || *p == '\t') p++; |
| 2279 | } |
| 2280 | } |
| 2281 | #endif /* 0 */ |
| 2282 | |
| 2283 | /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ |
| 2284 | |
| 2285 | static struct symtabs_and_lines |
| 2286 | get_catch_sals (this_level_only) |
| 2287 | int this_level_only; |
| 2288 | { |
| 2289 | register struct blockvector *bl; |
| 2290 | register struct block *block; |
| 2291 | int index, have_default = 0; |
| 2292 | struct frame_info *fi; |
| 2293 | CORE_ADDR pc; |
| 2294 | struct symtabs_and_lines sals; |
| 2295 | struct sal_chain *sal_chain = 0; |
| 2296 | char *blocks_searched; |
| 2297 | |
| 2298 | /* Not sure whether an error message is always the correct response, |
| 2299 | but it's better than a core dump. */ |
| 2300 | if (selected_frame == NULL) |
| 2301 | error ("No selected frame."); |
| 2302 | block = get_frame_block (selected_frame); |
| 2303 | fi = get_frame_info (selected_frame); |
| 2304 | pc = fi->pc; |
| 2305 | |
| 2306 | sals.nelts = 0; |
| 2307 | sals.sals = NULL; |
| 2308 | |
| 2309 | if (block == 0) |
| 2310 | error ("No symbol table info available.\n"); |
| 2311 | |
| 2312 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); |
| 2313 | blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| 2314 | memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| 2315 | |
| 2316 | while (block != 0) |
| 2317 | { |
| 2318 | CORE_ADDR end = BLOCK_END (block) - 4; |
| 2319 | int last_index; |
| 2320 | |
| 2321 | if (bl != blockvector_for_pc (end, &index)) |
| 2322 | error ("blockvector blotch"); |
| 2323 | if (BLOCKVECTOR_BLOCK (bl, index) != block) |
| 2324 | error ("blockvector botch"); |
| 2325 | last_index = BLOCKVECTOR_NBLOCKS (bl); |
| 2326 | index += 1; |
| 2327 | |
| 2328 | /* Don't print out blocks that have gone by. */ |
| 2329 | while (index < last_index |
| 2330 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) |
| 2331 | index++; |
| 2332 | |
| 2333 | while (index < last_index |
| 2334 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) |
| 2335 | { |
| 2336 | if (blocks_searched[index] == 0) |
| 2337 | { |
| 2338 | struct block *b = BLOCKVECTOR_BLOCK (bl, index); |
| 2339 | int nsyms; |
| 2340 | register int i; |
| 2341 | register struct symbol *sym; |
| 2342 | |
| 2343 | nsyms = BLOCK_NSYMS (b); |
| 2344 | |
| 2345 | for (i = 0; i < nsyms; i++) |
| 2346 | { |
| 2347 | sym = BLOCK_SYM (b, i); |
| 2348 | if (STREQ (SYMBOL_NAME (sym), "default")) |
| 2349 | { |
| 2350 | if (have_default) |
| 2351 | continue; |
| 2352 | have_default = 1; |
| 2353 | } |
| 2354 | if (SYMBOL_CLASS (sym) == LOC_LABEL) |
| 2355 | { |
| 2356 | struct sal_chain *next = (struct sal_chain *) |
| 2357 | alloca (sizeof (struct sal_chain)); |
| 2358 | next->next = sal_chain; |
| 2359 | next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); |
| 2360 | sal_chain = next; |
| 2361 | } |
| 2362 | } |
| 2363 | blocks_searched[index] = 1; |
| 2364 | } |
| 2365 | index++; |
| 2366 | } |
| 2367 | if (have_default) |
| 2368 | break; |
| 2369 | if (sal_chain && this_level_only) |
| 2370 | break; |
| 2371 | |
| 2372 | /* After handling the function's top-level block, stop. |
| 2373 | Don't continue to its superblock, the block of |
| 2374 | per-file symbols. */ |
| 2375 | if (BLOCK_FUNCTION (block)) |
| 2376 | break; |
| 2377 | block = BLOCK_SUPERBLOCK (block); |
| 2378 | } |
| 2379 | |
| 2380 | if (sal_chain) |
| 2381 | { |
| 2382 | struct sal_chain *tmp_chain; |
| 2383 | |
| 2384 | /* Count the number of entries. */ |
| 2385 | for (index = 0, tmp_chain = sal_chain; tmp_chain; |
| 2386 | tmp_chain = tmp_chain->next) |
| 2387 | index++; |
| 2388 | |
| 2389 | sals.nelts = index; |
| 2390 | sals.sals = (struct symtab_and_line *) |
| 2391 | xmalloc (index * sizeof (struct symtab_and_line)); |
| 2392 | for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) |
| 2393 | sals.sals[index] = sal_chain->sal; |
| 2394 | } |
| 2395 | |
| 2396 | return sals; |
| 2397 | } |
| 2398 | |
| 2399 | /* Commands to deal with catching exceptions. */ |
| 2400 | |
| 2401 | static void |
| 2402 | catch_command_1 (arg, tempflag, from_tty) |
| 2403 | char *arg; |
| 2404 | int tempflag; |
| 2405 | int from_tty; |
| 2406 | { |
| 2407 | /* First, translate ARG into something we can deal with in terms |
| 2408 | of breakpoints. */ |
| 2409 | |
| 2410 | struct symtabs_and_lines sals; |
| 2411 | struct symtab_and_line sal; |
| 2412 | register struct expression *cond = 0; |
| 2413 | register struct breakpoint *b; |
| 2414 | char *save_arg; |
| 2415 | int i; |
| 2416 | |
| 2417 | sal.line = sal.pc = sal.end = 0; |
| 2418 | sal.symtab = 0; |
| 2419 | |
| 2420 | /* If no arg given, or if first arg is 'if ', all active catch clauses |
| 2421 | are breakpointed. */ |
| 2422 | |
| 2423 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' |
| 2424 | && (arg[2] == ' ' || arg[2] == '\t'))) |
| 2425 | { |
| 2426 | /* Grab all active catch clauses. */ |
| 2427 | sals = get_catch_sals (0); |
| 2428 | } |
| 2429 | else |
| 2430 | { |
| 2431 | /* Grab selected catch clauses. */ |
| 2432 | error ("catch NAME not implemented"); |
| 2433 | #if 0 |
| 2434 | /* This isn't used; I don't know what it was for. */ |
| 2435 | sals = map_catch_names (arg, catch_breakpoint); |
| 2436 | #endif |
| 2437 | } |
| 2438 | |
| 2439 | if (! sals.nelts) |
| 2440 | return; |
| 2441 | |
| 2442 | save_arg = arg; |
| 2443 | for (i = 0; i < sals.nelts; i++) |
| 2444 | { |
| 2445 | resolve_sal_pc (&sals.sals[i]); |
| 2446 | |
| 2447 | while (arg && *arg) |
| 2448 | { |
| 2449 | if (arg[0] == 'i' && arg[1] == 'f' |
| 2450 | && (arg[2] == ' ' || arg[2] == '\t')) |
| 2451 | cond = parse_exp_1 ((arg += 2, &arg), |
| 2452 | block_for_pc (sals.sals[i].pc), 0); |
| 2453 | else |
| 2454 | error ("Junk at end of arguments."); |
| 2455 | } |
| 2456 | arg = save_arg; |
| 2457 | } |
| 2458 | |
| 2459 | for (i = 0; i < sals.nelts; i++) |
| 2460 | { |
| 2461 | sal = sals.sals[i]; |
| 2462 | |
| 2463 | if (from_tty) |
| 2464 | describe_other_breakpoints (sal.pc); |
| 2465 | |
| 2466 | b = set_raw_breakpoint (sal); |
| 2467 | set_breakpoint_count (breakpoint_count + 1); |
| 2468 | b->number = breakpoint_count; |
| 2469 | b->type = bp_breakpoint; |
| 2470 | b->cond = cond; |
| 2471 | b->enable = enabled; |
| 2472 | b->disposition = tempflag ? delete : donttouch; |
| 2473 | |
| 2474 | mention (b); |
| 2475 | } |
| 2476 | |
| 2477 | if (sals.nelts > 1) |
| 2478 | { |
| 2479 | printf_unfiltered ("Multiple breakpoints were set.\n"); |
| 2480 | printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); |
| 2481 | } |
| 2482 | free ((PTR)sals.sals); |
| 2483 | } |
| 2484 | |
| 2485 | #if 0 |
| 2486 | /* These aren't used; I don't know what they were for. */ |
| 2487 | /* Disable breakpoints on all catch clauses described in ARGS. */ |
| 2488 | static void |
| 2489 | disable_catch (args) |
| 2490 | char *args; |
| 2491 | { |
| 2492 | /* Map the disable command to catch clauses described in ARGS. */ |
| 2493 | } |
| 2494 | |
| 2495 | /* Enable breakpoints on all catch clauses described in ARGS. */ |
| 2496 | static void |
| 2497 | enable_catch (args) |
| 2498 | char *args; |
| 2499 | { |
| 2500 | /* Map the disable command to catch clauses described in ARGS. */ |
| 2501 | } |
| 2502 | |
| 2503 | /* Delete breakpoints on all catch clauses in the active scope. */ |
| 2504 | static void |
| 2505 | delete_catch (args) |
| 2506 | char *args; |
| 2507 | { |
| 2508 | /* Map the delete command to catch clauses described in ARGS. */ |
| 2509 | } |
| 2510 | #endif /* 0 */ |
| 2511 | |
| 2512 | static void |
| 2513 | catch_command (arg, from_tty) |
| 2514 | char *arg; |
| 2515 | int from_tty; |
| 2516 | { |
| 2517 | catch_command_1 (arg, 0, from_tty); |
| 2518 | } |
| 2519 | \f |
| 2520 | static void |
| 2521 | clear_command (arg, from_tty) |
| 2522 | char *arg; |
| 2523 | int from_tty; |
| 2524 | { |
| 2525 | register struct breakpoint *b, *b1; |
| 2526 | struct symtabs_and_lines sals; |
| 2527 | struct symtab_and_line sal; |
| 2528 | register struct breakpoint *found; |
| 2529 | int i; |
| 2530 | |
| 2531 | if (arg) |
| 2532 | { |
| 2533 | sals = decode_line_spec (arg, 1); |
| 2534 | } |
| 2535 | else |
| 2536 | { |
| 2537 | sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); |
| 2538 | sal.line = default_breakpoint_line; |
| 2539 | sal.symtab = default_breakpoint_symtab; |
| 2540 | sal.pc = 0; |
| 2541 | if (sal.symtab == 0) |
| 2542 | error ("No source file specified."); |
| 2543 | |
| 2544 | sals.sals[0] = sal; |
| 2545 | sals.nelts = 1; |
| 2546 | } |
| 2547 | |
| 2548 | for (i = 0; i < sals.nelts; i++) |
| 2549 | { |
| 2550 | /* If exact pc given, clear bpts at that pc. |
| 2551 | But if sal.pc is zero, clear all bpts on specified line. */ |
| 2552 | sal = sals.sals[i]; |
| 2553 | found = (struct breakpoint *) 0; |
| 2554 | while (breakpoint_chain |
| 2555 | && (sal.pc |
| 2556 | ? breakpoint_chain->address == sal.pc |
| 2557 | : (breakpoint_chain->source_file != NULL |
| 2558 | && sal.symtab != NULL |
| 2559 | && STREQ (breakpoint_chain->source_file, |
| 2560 | sal.symtab->filename) |
| 2561 | && breakpoint_chain->line_number == sal.line))) |
| 2562 | { |
| 2563 | b1 = breakpoint_chain; |
| 2564 | breakpoint_chain = b1->next; |
| 2565 | b1->next = found; |
| 2566 | found = b1; |
| 2567 | } |
| 2568 | |
| 2569 | ALL_BREAKPOINTS (b) |
| 2570 | while (b->next |
| 2571 | && b->next->type != bp_watchpoint |
| 2572 | && (sal.pc |
| 2573 | ? b->next->address == sal.pc |
| 2574 | : (b->next->source_file != NULL |
| 2575 | && sal.symtab != NULL |
| 2576 | && STREQ (b->next->source_file, sal.symtab->filename) |
| 2577 | && b->next->line_number == sal.line))) |
| 2578 | { |
| 2579 | b1 = b->next; |
| 2580 | b->next = b1->next; |
| 2581 | b1->next = found; |
| 2582 | found = b1; |
| 2583 | } |
| 2584 | |
| 2585 | if (found == 0) |
| 2586 | { |
| 2587 | if (arg) |
| 2588 | error ("No breakpoint at %s.", arg); |
| 2589 | else |
| 2590 | error ("No breakpoint at this line."); |
| 2591 | } |
| 2592 | |
| 2593 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ |
| 2594 | if (from_tty) printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : ""); |
| 2595 | while (found) |
| 2596 | { |
| 2597 | if (from_tty) printf_unfiltered ("%d ", found->number); |
| 2598 | b1 = found->next; |
| 2599 | delete_breakpoint (found); |
| 2600 | found = b1; |
| 2601 | } |
| 2602 | if (from_tty) putchar_unfiltered ('\n'); |
| 2603 | } |
| 2604 | free ((PTR)sals.sals); |
| 2605 | } |
| 2606 | \f |
| 2607 | /* Delete breakpoint in BS if they are `delete' breakpoints. |
| 2608 | This is called after any breakpoint is hit, or after errors. */ |
| 2609 | |
| 2610 | void |
| 2611 | breakpoint_auto_delete (bs) |
| 2612 | bpstat bs; |
| 2613 | { |
| 2614 | for (; bs; bs = bs->next) |
| 2615 | if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete |
| 2616 | && bs->stop) |
| 2617 | delete_breakpoint (bs->breakpoint_at); |
| 2618 | } |
| 2619 | |
| 2620 | /* Delete a breakpoint and clean up all traces of it in the data structures. */ |
| 2621 | |
| 2622 | void |
| 2623 | delete_breakpoint (bpt) |
| 2624 | struct breakpoint *bpt; |
| 2625 | { |
| 2626 | register struct breakpoint *b; |
| 2627 | register bpstat bs; |
| 2628 | |
| 2629 | if (bpt->inserted) |
| 2630 | target_remove_breakpoint(bpt->address, bpt->shadow_contents); |
| 2631 | |
| 2632 | if (breakpoint_chain == bpt) |
| 2633 | breakpoint_chain = bpt->next; |
| 2634 | |
| 2635 | ALL_BREAKPOINTS (b) |
| 2636 | if (b->next == bpt) |
| 2637 | { |
| 2638 | b->next = bpt->next; |
| 2639 | break; |
| 2640 | } |
| 2641 | |
| 2642 | check_duplicates (bpt->address); |
| 2643 | /* If this breakpoint was inserted, and there is another breakpoint |
| 2644 | at the same address, we need to insert the other breakpoint. */ |
| 2645 | if (bpt->inserted) |
| 2646 | { |
| 2647 | ALL_BREAKPOINTS (b) |
| 2648 | if (b->address == bpt->address |
| 2649 | && !b->duplicate |
| 2650 | && b->enable != disabled) |
| 2651 | { |
| 2652 | int val; |
| 2653 | val = target_insert_breakpoint (b->address, b->shadow_contents); |
| 2654 | if (val != 0) |
| 2655 | { |
| 2656 | target_terminal_ours_for_output (); |
| 2657 | fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); |
| 2658 | memory_error (val, b->address); /* which bombs us out */ |
| 2659 | } |
| 2660 | else |
| 2661 | b->inserted = 1; |
| 2662 | } |
| 2663 | } |
| 2664 | |
| 2665 | free_command_lines (&bpt->commands); |
| 2666 | if (bpt->cond) |
| 2667 | free (bpt->cond); |
| 2668 | if (bpt->cond_string != NULL) |
| 2669 | free (bpt->cond_string); |
| 2670 | if (bpt->addr_string != NULL) |
| 2671 | free (bpt->addr_string); |
| 2672 | if (bpt->exp_string != NULL) |
| 2673 | free (bpt->exp_string); |
| 2674 | if (bpt->source_file != NULL) |
| 2675 | free (bpt->source_file); |
| 2676 | |
| 2677 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
| 2678 | { |
| 2679 | target_terminal_ours_for_output (); |
| 2680 | printf_unfiltered ("breakpoint #%d deleted\n", bpt->number); |
| 2681 | } |
| 2682 | |
| 2683 | /* Be sure no bpstat's are pointing at it after it's been freed. */ |
| 2684 | /* FIXME, how can we find all bpstat's? |
| 2685 | We just check stop_bpstat for now. */ |
| 2686 | for (bs = stop_bpstat; bs; bs = bs->next) |
| 2687 | if (bs->breakpoint_at == bpt) |
| 2688 | bs->breakpoint_at = NULL; |
| 2689 | free ((PTR)bpt); |
| 2690 | } |
| 2691 | |
| 2692 | static void |
| 2693 | delete_command (arg, from_tty) |
| 2694 | char *arg; |
| 2695 | int from_tty; |
| 2696 | { |
| 2697 | |
| 2698 | if (arg == 0) |
| 2699 | { |
| 2700 | /* Ask user only if there are some breakpoints to delete. */ |
| 2701 | if (!from_tty |
| 2702 | || (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0))) |
| 2703 | { |
| 2704 | /* No arg; clear all breakpoints. */ |
| 2705 | while (breakpoint_chain) |
| 2706 | delete_breakpoint (breakpoint_chain); |
| 2707 | } |
| 2708 | } |
| 2709 | else |
| 2710 | map_breakpoint_numbers (arg, delete_breakpoint); |
| 2711 | } |
| 2712 | |
| 2713 | /* Reset a breakpoint given it's struct breakpoint * BINT. |
| 2714 | The value we return ends up being the return value from catch_errors. |
| 2715 | Unused in this case. */ |
| 2716 | |
| 2717 | static int |
| 2718 | breakpoint_re_set_one (bint) |
| 2719 | char *bint; |
| 2720 | { |
| 2721 | struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ |
| 2722 | int i; |
| 2723 | struct symtabs_and_lines sals; |
| 2724 | char *s; |
| 2725 | enum enable save_enable; |
| 2726 | |
| 2727 | switch (b->type) |
| 2728 | { |
| 2729 | case bp_breakpoint: |
| 2730 | if (b->addr_string == NULL) |
| 2731 | { |
| 2732 | /* Anything without a string can't be re-set. */ |
| 2733 | delete_breakpoint (b); |
| 2734 | return 0; |
| 2735 | } |
| 2736 | /* In case we have a problem, disable this breakpoint. We'll restore |
| 2737 | its status if we succeed. */ |
| 2738 | save_enable = b->enable; |
| 2739 | b->enable = disabled; |
| 2740 | |
| 2741 | s = b->addr_string; |
| 2742 | sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0, (char ***)NULL); |
| 2743 | for (i = 0; i < sals.nelts; i++) |
| 2744 | { |
| 2745 | resolve_sal_pc (&sals.sals[i]); |
| 2746 | |
| 2747 | /* Reparse conditions, they might contain references to the |
| 2748 | old symtab. */ |
| 2749 | if (b->cond_string != NULL) |
| 2750 | { |
| 2751 | s = b->cond_string; |
| 2752 | if (b->cond) |
| 2753 | free ((PTR)b->cond); |
| 2754 | b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); |
| 2755 | } |
| 2756 | |
| 2757 | /* We need to re-set the breakpoint if the address changes...*/ |
| 2758 | if (b->address != sals.sals[i].pc |
| 2759 | /* ...or new and old breakpoints both have source files, and |
| 2760 | the source file name or the line number changes... */ |
| 2761 | || (b->source_file != NULL |
| 2762 | && sals.sals[i].symtab != NULL |
| 2763 | && (!STREQ (b->source_file, sals.sals[i].symtab->filename) |
| 2764 | || b->line_number != sals.sals[i].line) |
| 2765 | ) |
| 2766 | /* ...or we switch between having a source file and not having |
| 2767 | one. */ |
| 2768 | || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL)) |
| 2769 | ) |
| 2770 | { |
| 2771 | if (b->source_file != NULL) |
| 2772 | free (b->source_file); |
| 2773 | if (sals.sals[i].symtab == NULL) |
| 2774 | b->source_file = NULL; |
| 2775 | else |
| 2776 | b->source_file = |
| 2777 | savestring (sals.sals[i].symtab->filename, |
| 2778 | strlen (sals.sals[i].symtab->filename)); |
| 2779 | b->line_number = sals.sals[i].line; |
| 2780 | b->address = sals.sals[i].pc; |
| 2781 | |
| 2782 | check_duplicates (b->address); |
| 2783 | |
| 2784 | mention (b); |
| 2785 | } |
| 2786 | b->enable = save_enable; /* Restore it, this worked. */ |
| 2787 | } |
| 2788 | free ((PTR)sals.sals); |
| 2789 | break; |
| 2790 | |
| 2791 | case bp_watchpoint: |
| 2792 | innermost_block = NULL; |
| 2793 | /* The issue arises of what context to evaluate this in. The same |
| 2794 | one as when it was set, but what does that mean when symbols have |
| 2795 | been re-read? We could save the filename and functionname, but |
| 2796 | if the context is more local than that, the best we could do would |
| 2797 | be something like how many levels deep and which index at that |
| 2798 | particular level, but that's going to be less stable than filenames |
| 2799 | or functionnames. */ |
| 2800 | /* So for now, just use a global context. */ |
| 2801 | b->exp = parse_expression (b->exp_string); |
| 2802 | b->exp_valid_block = innermost_block; |
| 2803 | b->val = evaluate_expression (b->exp); |
| 2804 | release_value (b->val); |
| 2805 | if (VALUE_LAZY (b->val)) |
| 2806 | value_fetch_lazy (b->val); |
| 2807 | |
| 2808 | if (b->cond_string != NULL) |
| 2809 | { |
| 2810 | s = b->cond_string; |
| 2811 | b->cond = parse_exp_1 (&s, (struct block *)0, 0); |
| 2812 | } |
| 2813 | if (b->enable == enabled) |
| 2814 | mention (b); |
| 2815 | break; |
| 2816 | |
| 2817 | default: |
| 2818 | printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); |
| 2819 | /* fall through */ |
| 2820 | case bp_until: |
| 2821 | case bp_finish: |
| 2822 | case bp_longjmp: |
| 2823 | case bp_longjmp_resume: |
| 2824 | case bp_call_dummy: |
| 2825 | delete_breakpoint (b); |
| 2826 | break; |
| 2827 | } |
| 2828 | |
| 2829 | return 0; |
| 2830 | } |
| 2831 | |
| 2832 | /* Re-set all breakpoints after symbols have been re-loaded. */ |
| 2833 | void |
| 2834 | breakpoint_re_set () |
| 2835 | { |
| 2836 | struct breakpoint *b, *temp; |
| 2837 | static char message1[] = "Error in re-setting breakpoint %d:\n"; |
| 2838 | char message[sizeof (message1) + 30 /* slop */]; |
| 2839 | |
| 2840 | ALL_BREAKPOINTS_SAFE (b, temp) |
| 2841 | { |
| 2842 | sprintf (message, message1, b->number); /* Format possible error msg */ |
| 2843 | catch_errors (breakpoint_re_set_one, (char *) b, message, |
| 2844 | RETURN_MASK_ALL); |
| 2845 | } |
| 2846 | |
| 2847 | create_longjmp_breakpoint("longjmp"); |
| 2848 | create_longjmp_breakpoint("_longjmp"); |
| 2849 | create_longjmp_breakpoint("siglongjmp"); |
| 2850 | create_longjmp_breakpoint(NULL); |
| 2851 | |
| 2852 | #if 0 |
| 2853 | /* Took this out (temporaliy at least), since it produces an extra |
| 2854 | blank line at startup. This messes up the gdbtests. -PB */ |
| 2855 | /* Blank line to finish off all those mention() messages we just printed. */ |
| 2856 | printf_filtered ("\n"); |
| 2857 | #endif |
| 2858 | } |
| 2859 | \f |
| 2860 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| 2861 | If from_tty is nonzero, it prints a message to that effect, |
| 2862 | which ends with a period (no newline). */ |
| 2863 | |
| 2864 | void |
| 2865 | set_ignore_count (bptnum, count, from_tty) |
| 2866 | int bptnum, count, from_tty; |
| 2867 | { |
| 2868 | register struct breakpoint *b; |
| 2869 | |
| 2870 | if (count < 0) |
| 2871 | count = 0; |
| 2872 | |
| 2873 | ALL_BREAKPOINTS (b) |
| 2874 | if (b->number == bptnum) |
| 2875 | { |
| 2876 | b->ignore_count = count; |
| 2877 | if (!from_tty) |
| 2878 | return; |
| 2879 | else if (count == 0) |
| 2880 | printf_filtered ("Will stop next time breakpoint %d is reached.", |
| 2881 | bptnum); |
| 2882 | else if (count == 1) |
| 2883 | printf_filtered ("Will ignore next crossing of breakpoint %d.", |
| 2884 | bptnum); |
| 2885 | else |
| 2886 | printf_filtered ("Will ignore next %d crossings of breakpoint %d.", |
| 2887 | count, bptnum); |
| 2888 | return; |
| 2889 | } |
| 2890 | |
| 2891 | error ("No breakpoint number %d.", bptnum); |
| 2892 | } |
| 2893 | |
| 2894 | /* Clear the ignore counts of all breakpoints. */ |
| 2895 | void |
| 2896 | breakpoint_clear_ignore_counts () |
| 2897 | { |
| 2898 | struct breakpoint *b; |
| 2899 | |
| 2900 | ALL_BREAKPOINTS (b) |
| 2901 | b->ignore_count = 0; |
| 2902 | } |
| 2903 | |
| 2904 | /* Command to set ignore-count of breakpoint N to COUNT. */ |
| 2905 | |
| 2906 | static void |
| 2907 | ignore_command (args, from_tty) |
| 2908 | char *args; |
| 2909 | int from_tty; |
| 2910 | { |
| 2911 | char *p = args; |
| 2912 | register int num; |
| 2913 | |
| 2914 | if (p == 0) |
| 2915 | error_no_arg ("a breakpoint number"); |
| 2916 | |
| 2917 | num = get_number (&p); |
| 2918 | |
| 2919 | if (*p == 0) |
| 2920 | error ("Second argument (specified ignore-count) is missing."); |
| 2921 | |
| 2922 | set_ignore_count (num, |
| 2923 | longest_to_int (value_as_long (parse_and_eval (p))), |
| 2924 | from_tty); |
| 2925 | printf_filtered ("\n"); |
| 2926 | } |
| 2927 | \f |
| 2928 | /* Call FUNCTION on each of the breakpoints |
| 2929 | whose numbers are given in ARGS. */ |
| 2930 | |
| 2931 | static void |
| 2932 | map_breakpoint_numbers (args, function) |
| 2933 | char *args; |
| 2934 | void (*function) PARAMS ((struct breakpoint *)); |
| 2935 | { |
| 2936 | register char *p = args; |
| 2937 | char *p1; |
| 2938 | register int num; |
| 2939 | register struct breakpoint *b; |
| 2940 | |
| 2941 | if (p == 0) |
| 2942 | error_no_arg ("one or more breakpoint numbers"); |
| 2943 | |
| 2944 | while (*p) |
| 2945 | { |
| 2946 | p1 = p; |
| 2947 | |
| 2948 | num = get_number (&p1); |
| 2949 | |
| 2950 | ALL_BREAKPOINTS (b) |
| 2951 | if (b->number == num) |
| 2952 | { |
| 2953 | function (b); |
| 2954 | goto win; |
| 2955 | } |
| 2956 | printf_unfiltered ("No breakpoint number %d.\n", num); |
| 2957 | win: |
| 2958 | p = p1; |
| 2959 | } |
| 2960 | } |
| 2961 | |
| 2962 | static void |
| 2963 | enable_breakpoint (bpt) |
| 2964 | struct breakpoint *bpt; |
| 2965 | { |
| 2966 | FRAME save_selected_frame = NULL; |
| 2967 | int save_selected_frame_level = -1; |
| 2968 | |
| 2969 | bpt->enable = enabled; |
| 2970 | |
| 2971 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
| 2972 | printf_unfiltered ("breakpoint #%d enabled\n", bpt->number); |
| 2973 | |
| 2974 | check_duplicates (bpt->address); |
| 2975 | if (bpt->type == bp_watchpoint) |
| 2976 | { |
| 2977 | if (bpt->exp_valid_block != NULL) |
| 2978 | { |
| 2979 | FRAME fr = within_scope (bpt->exp_valid_block); |
| 2980 | if (fr == NULL) |
| 2981 | { |
| 2982 | printf_filtered ("\ |
| 2983 | Cannot enable watchpoint %d because the block in which its expression\n\ |
| 2984 | is valid is not currently in scope.\n", bpt->number); |
| 2985 | bpt->enable = disabled; |
| 2986 | return; |
| 2987 | } |
| 2988 | save_selected_frame = selected_frame; |
| 2989 | save_selected_frame_level = selected_frame_level; |
| 2990 | select_frame (fr, -1); |
| 2991 | } |
| 2992 | |
| 2993 | value_free (bpt->val); |
| 2994 | |
| 2995 | bpt->val = evaluate_expression (bpt->exp); |
| 2996 | release_value (bpt->val); |
| 2997 | if (VALUE_LAZY (bpt->val)) |
| 2998 | value_fetch_lazy (bpt->val); |
| 2999 | |
| 3000 | if (save_selected_frame_level >= 0) |
| 3001 | select_frame (save_selected_frame, save_selected_frame_level); |
| 3002 | } |
| 3003 | } |
| 3004 | |
| 3005 | /* ARGSUSED */ |
| 3006 | static void |
| 3007 | enable_command (args, from_tty) |
| 3008 | char *args; |
| 3009 | int from_tty; |
| 3010 | { |
| 3011 | struct breakpoint *bpt; |
| 3012 | if (args == 0) |
| 3013 | ALL_BREAKPOINTS (bpt) |
| 3014 | switch (bpt->type) |
| 3015 | { |
| 3016 | case bp_breakpoint: |
| 3017 | case bp_watchpoint: |
| 3018 | enable_breakpoint (bpt); |
| 3019 | default: |
| 3020 | continue; |
| 3021 | } |
| 3022 | else |
| 3023 | map_breakpoint_numbers (args, enable_breakpoint); |
| 3024 | } |
| 3025 | |
| 3026 | static void |
| 3027 | disable_breakpoint (bpt) |
| 3028 | struct breakpoint *bpt; |
| 3029 | { |
| 3030 | bpt->enable = disabled; |
| 3031 | |
| 3032 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
| 3033 | printf_filtered ("breakpoint #%d disabled\n", bpt->number); |
| 3034 | |
| 3035 | check_duplicates (bpt->address); |
| 3036 | } |
| 3037 | |
| 3038 | /* ARGSUSED */ |
| 3039 | static void |
| 3040 | disable_command (args, from_tty) |
| 3041 | char *args; |
| 3042 | int from_tty; |
| 3043 | { |
| 3044 | register struct breakpoint *bpt; |
| 3045 | if (args == 0) |
| 3046 | ALL_BREAKPOINTS (bpt) |
| 3047 | switch (bpt->type) |
| 3048 | { |
| 3049 | case bp_breakpoint: |
| 3050 | case bp_watchpoint: |
| 3051 | disable_breakpoint (bpt); |
| 3052 | default: |
| 3053 | continue; |
| 3054 | } |
| 3055 | else |
| 3056 | map_breakpoint_numbers (args, disable_breakpoint); |
| 3057 | } |
| 3058 | |
| 3059 | static void |
| 3060 | enable_once_breakpoint (bpt) |
| 3061 | struct breakpoint *bpt; |
| 3062 | { |
| 3063 | bpt->enable = enabled; |
| 3064 | bpt->disposition = disable; |
| 3065 | |
| 3066 | check_duplicates (bpt->address); |
| 3067 | } |
| 3068 | |
| 3069 | /* ARGSUSED */ |
| 3070 | static void |
| 3071 | enable_once_command (args, from_tty) |
| 3072 | char *args; |
| 3073 | int from_tty; |
| 3074 | { |
| 3075 | map_breakpoint_numbers (args, enable_once_breakpoint); |
| 3076 | } |
| 3077 | |
| 3078 | static void |
| 3079 | enable_delete_breakpoint (bpt) |
| 3080 | struct breakpoint *bpt; |
| 3081 | { |
| 3082 | bpt->enable = enabled; |
| 3083 | bpt->disposition = delete; |
| 3084 | |
| 3085 | check_duplicates (bpt->address); |
| 3086 | } |
| 3087 | |
| 3088 | /* ARGSUSED */ |
| 3089 | static void |
| 3090 | enable_delete_command (args, from_tty) |
| 3091 | char *args; |
| 3092 | int from_tty; |
| 3093 | { |
| 3094 | map_breakpoint_numbers (args, enable_delete_breakpoint); |
| 3095 | } |
| 3096 | \f |
| 3097 | /* |
| 3098 | * Use default_breakpoint_'s, or nothing if they aren't valid. |
| 3099 | */ |
| 3100 | struct symtabs_and_lines |
| 3101 | decode_line_spec_1 (string, funfirstline) |
| 3102 | char *string; |
| 3103 | int funfirstline; |
| 3104 | { |
| 3105 | struct symtabs_and_lines sals; |
| 3106 | if (string == 0) |
| 3107 | error ("Empty line specification."); |
| 3108 | if (default_breakpoint_valid) |
| 3109 | sals = decode_line_1 (&string, funfirstline, |
| 3110 | default_breakpoint_symtab, default_breakpoint_line, |
| 3111 | (char ***)NULL); |
| 3112 | else |
| 3113 | sals = decode_line_1 (&string, funfirstline, |
| 3114 | (struct symtab *)NULL, 0, (char ***)NULL); |
| 3115 | if (*string) |
| 3116 | error ("Junk at end of line specification: %s", string); |
| 3117 | return sals; |
| 3118 | } |
| 3119 | \f |
| 3120 | void |
| 3121 | _initialize_breakpoint () |
| 3122 | { |
| 3123 | breakpoint_chain = 0; |
| 3124 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful |
| 3125 | before a breakpoint is set. */ |
| 3126 | breakpoint_count = 0; |
| 3127 | |
| 3128 | add_com ("ignore", class_breakpoint, ignore_command, |
| 3129 | "Set ignore-count of breakpoint number N to COUNT."); |
| 3130 | |
| 3131 | add_com ("commands", class_breakpoint, commands_command, |
| 3132 | "Set commands to be executed when a breakpoint is hit.\n\ |
| 3133 | Give breakpoint number as argument after \"commands\".\n\ |
| 3134 | With no argument, the targeted breakpoint is the last one set.\n\ |
| 3135 | The commands themselves follow starting on the next line.\n\ |
| 3136 | Type a line containing \"end\" to indicate the end of them.\n\ |
| 3137 | Give \"silent\" as the first line to make the breakpoint silent;\n\ |
| 3138 | then no output is printed when it is hit, except what the commands print."); |
| 3139 | |
| 3140 | add_com ("condition", class_breakpoint, condition_command, |
| 3141 | "Specify breakpoint number N to break only if COND is true.\n\ |
| 3142 | N is an integer; COND is an expression to be evaluated whenever\n\ |
| 3143 | breakpoint N is reached. "); |
| 3144 | |
| 3145 | add_com ("tbreak", class_breakpoint, tbreak_command, |
| 3146 | "Set a temporary breakpoint. Args like \"break\" command.\n\ |
| 3147 | Like \"break\" except the breakpoint is only enabled temporarily,\n\ |
| 3148 | so it will be disabled when hit. Equivalent to \"break\" followed\n\ |
| 3149 | by using \"enable once\" on the breakpoint number."); |
| 3150 | |
| 3151 | add_prefix_cmd ("enable", class_breakpoint, enable_command, |
| 3152 | "Enable some breakpoints.\n\ |
| 3153 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 3154 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| 3155 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 3156 | With a subcommand you can enable temporarily.", |
| 3157 | &enablelist, "enable ", 1, &cmdlist); |
| 3158 | |
| 3159 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, |
| 3160 | "Enable some breakpoints.\n\ |
| 3161 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 3162 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 3163 | May be abbreviated to simply \"enable\".\n", |
| 3164 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); |
| 3165 | |
| 3166 | add_cmd ("once", no_class, enable_once_command, |
| 3167 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| 3168 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ |
| 3169 | See the \"tbreak\" command which sets a breakpoint and enables it once.", |
| 3170 | &enablebreaklist); |
| 3171 | |
| 3172 | add_cmd ("delete", no_class, enable_delete_command, |
| 3173 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| 3174 | If a breakpoint is hit while enabled in this fashion, it is deleted.", |
| 3175 | &enablebreaklist); |
| 3176 | |
| 3177 | add_cmd ("delete", no_class, enable_delete_command, |
| 3178 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| 3179 | If a breakpoint is hit while enabled in this fashion, it is deleted.", |
| 3180 | &enablelist); |
| 3181 | |
| 3182 | add_cmd ("once", no_class, enable_once_command, |
| 3183 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| 3184 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ |
| 3185 | See the \"tbreak\" command which sets a breakpoint and enables it once.", |
| 3186 | &enablelist); |
| 3187 | |
| 3188 | add_prefix_cmd ("disable", class_breakpoint, disable_command, |
| 3189 | "Disable some breakpoints.\n\ |
| 3190 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 3191 | To disable all breakpoints, give no argument.\n\ |
| 3192 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", |
| 3193 | &disablelist, "disable ", 1, &cmdlist); |
| 3194 | add_com_alias ("dis", "disable", class_breakpoint, 1); |
| 3195 | add_com_alias ("disa", "disable", class_breakpoint, 1); |
| 3196 | |
| 3197 | add_cmd ("breakpoints", class_alias, disable_command, |
| 3198 | "Disable some breakpoints.\n\ |
| 3199 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 3200 | To disable all breakpoints, give no argument.\n\ |
| 3201 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ |
| 3202 | This command may be abbreviated \"disable\".", |
| 3203 | &disablelist); |
| 3204 | |
| 3205 | add_prefix_cmd ("delete", class_breakpoint, delete_command, |
| 3206 | "Delete some breakpoints or auto-display expressions.\n\ |
| 3207 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 3208 | To delete all breakpoints, give no argument.\n\ |
| 3209 | \n\ |
| 3210 | Also a prefix command for deletion of other GDB objects.\n\ |
| 3211 | The \"unset\" command is also an alias for \"delete\".", |
| 3212 | &deletelist, "delete ", 1, &cmdlist); |
| 3213 | add_com_alias ("d", "delete", class_breakpoint, 1); |
| 3214 | |
| 3215 | add_cmd ("breakpoints", class_alias, delete_command, |
| 3216 | "Delete some breakpoints or auto-display expressions.\n\ |
| 3217 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 3218 | To delete all breakpoints, give no argument.\n\ |
| 3219 | This command may be abbreviated \"delete\".", |
| 3220 | &deletelist); |
| 3221 | |
| 3222 | add_com ("clear", class_breakpoint, clear_command, |
| 3223 | "Clear breakpoint at specified line or function.\n\ |
| 3224 | Argument may be line number, function name, or \"*\" and an address.\n\ |
| 3225 | If line number is specified, all breakpoints in that line are cleared.\n\ |
| 3226 | If function is specified, breakpoints at beginning of function are cleared.\n\ |
| 3227 | If an address is specified, breakpoints at that address are cleared.\n\n\ |
| 3228 | With no argument, clears all breakpoints in the line that the selected frame\n\ |
| 3229 | is executing in.\n\ |
| 3230 | \n\ |
| 3231 | See also the \"delete\" command which clears breakpoints by number."); |
| 3232 | |
| 3233 | add_com ("break", class_breakpoint, break_command, |
| 3234 | "Set breakpoint at specified line or function.\n\ |
| 3235 | Argument may be line number, function name, or \"*\" and an address.\n\ |
| 3236 | If line number is specified, break at start of code for that line.\n\ |
| 3237 | If function is specified, break at start of code for that function.\n\ |
| 3238 | If an address is specified, break at that exact address.\n\ |
| 3239 | With no arg, uses current execution address of selected stack frame.\n\ |
| 3240 | This is useful for breaking on return to a stack frame.\n\ |
| 3241 | \n\ |
| 3242 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ |
| 3243 | \n\ |
| 3244 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); |
| 3245 | add_com_alias ("b", "break", class_run, 1); |
| 3246 | add_com_alias ("br", "break", class_run, 1); |
| 3247 | add_com_alias ("bre", "break", class_run, 1); |
| 3248 | add_com_alias ("brea", "break", class_run, 1); |
| 3249 | |
| 3250 | add_info ("breakpoints", breakpoints_info, |
| 3251 | "Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| 3252 | The \"Type\" column indicates one of:\n\ |
| 3253 | \tbreakpoint - normal breakpoint\n\ |
| 3254 | \twatchpoint - watchpoint\n\ |
| 3255 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| 3256 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| 3257 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| 3258 | address and file/line number respectively.\n\n\ |
| 3259 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 3260 | are set to the address of the last breakpoint listed.\n\n\ |
| 3261 | Convenience variable \"$bpnum\" contains the number of the last\n\ |
| 3262 | breakpoint set."); |
| 3263 | |
| 3264 | #if MAINTENANCE_CMDS |
| 3265 | |
| 3266 | add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, |
| 3267 | "Status of all breakpoints, or breakpoint number NUMBER.\n\ |
| 3268 | The \"Type\" column indicates one of:\n\ |
| 3269 | \tbreakpoint - normal breakpoint\n\ |
| 3270 | \twatchpoint - watchpoint\n\ |
| 3271 | \tlongjmp - internal breakpoint used to step through longjmp()\n\ |
| 3272 | \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ |
| 3273 | \tuntil - internal breakpoint used by the \"until\" command\n\ |
| 3274 | \tfinish - internal breakpoint used by the \"finish\" command\n\ |
| 3275 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| 3276 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| 3277 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| 3278 | address and file/line number respectively.\n\n\ |
| 3279 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 3280 | are set to the address of the last breakpoint listed.\n\n\ |
| 3281 | Convenience variable \"$bpnum\" contains the number of the last\n\ |
| 3282 | breakpoint set.", |
| 3283 | &maintenanceinfolist); |
| 3284 | |
| 3285 | #endif /* MAINTENANCE_CMDS */ |
| 3286 | |
| 3287 | add_com ("catch", class_breakpoint, catch_command, |
| 3288 | "Set breakpoints to catch exceptions that are raised.\n\ |
| 3289 | Argument may be a single exception to catch, multiple exceptions\n\ |
| 3290 | to catch, or the default exception \"default\". If no arguments\n\ |
| 3291 | are given, breakpoints are set at all exception handlers catch clauses\n\ |
| 3292 | within the current scope.\n\ |
| 3293 | \n\ |
| 3294 | A condition specified for the catch applies to all breakpoints set\n\ |
| 3295 | with this command\n\ |
| 3296 | \n\ |
| 3297 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); |
| 3298 | |
| 3299 | add_com ("watch", class_breakpoint, watch_command, |
| 3300 | "Set a watchpoint for an expression.\n\ |
| 3301 | A watchpoint stops execution of your program whenever the value of\n\ |
| 3302 | an expression changes."); |
| 3303 | |
| 3304 | add_info ("watchpoints", breakpoints_info, |
| 3305 | "Synonym for ``info breakpoints''."); |
| 3306 | } |
| 3307 | |
| 3308 | /* OK, when we call objfile_relocate, we need to relocate breakpoints |
| 3309 | too. breakpoint_re_set is not a good choice--for example, if |
| 3310 | addr_string contains just a line number without a file name the |
| 3311 | breakpoint might get set in a different file. In general, there is |
| 3312 | no need to go all the way back to the user's string (though this might |
| 3313 | work if some effort were made to canonicalize it), since symtabs and |
| 3314 | everything except addresses are still valid. |
| 3315 | |
| 3316 | Probably the best way to solve this is to have each breakpoint save |
| 3317 | the objfile and the section number that was used to set it (if set |
| 3318 | by "*addr", probably it is best to use find_pc_line to get a symtab |
| 3319 | and use the objfile and block_line_section for that symtab). Then |
| 3320 | objfile_relocate can call fixup_breakpoints with the objfile and |
| 3321 | the new_offsets, and it can relocate only the appropriate breakpoints. */ |
| 3322 | |
| 3323 | #ifdef IBM6000_TARGET |
| 3324 | /* But for now, just kludge it based on the concept that before an |
| 3325 | objfile is relocated the breakpoint is below 0x10000000, and afterwards |
| 3326 | it is higher, so that way we only relocate each breakpoint once. */ |
| 3327 | |
| 3328 | void |
| 3329 | fixup_breakpoints (low, high, delta) |
| 3330 | CORE_ADDR low; |
| 3331 | CORE_ADDR high; |
| 3332 | CORE_ADDR delta; |
| 3333 | { |
| 3334 | struct breakpoint *b; |
| 3335 | |
| 3336 | ALL_BREAKPOINTS (b) |
| 3337 | { |
| 3338 | if (b->address >= low && b->address <= high) |
| 3339 | b->address += delta; |
| 3340 | } |
| 3341 | } |
| 3342 | #endif |