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cc61838f WJ |
1 | /*- |
2 | * This code is derived from software copyrighted by the Free Software | |
3 | * Foundation. | |
4 | * | |
5 | * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. | |
6 | * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. | |
7 | */ | |
8 | ||
9 | #ifndef lint | |
10 | static char sccsid[] = "@(#)breakpoint.c 6.3 (Berkeley) 5/8/91"; | |
11 | #endif /* not lint */ | |
12 | ||
13 | /* Everything about breakpoints, for GDB. | |
14 | Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. | |
15 | ||
16 | This file is part of GDB. | |
17 | ||
18 | GDB is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 1, or (at your option) | |
21 | any later version. | |
22 | ||
23 | GDB is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with GDB; see the file COPYING. If not, write to | |
30 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
32 | #include <stdio.h> | |
33 | #include "defs.h" | |
34 | #include "param.h" | |
35 | #include "symtab.h" | |
36 | #include "frame.h" | |
37 | ||
38 | /* This is the sequence of bytes we insert for a breakpoint. */ | |
39 | ||
40 | static char break_insn[] = BREAKPOINT; | |
41 | ||
42 | /* States of enablement of breakpoint. | |
43 | `temporary' means disable when hit. | |
44 | `delete' means delete when hit. */ | |
45 | ||
46 | enum enable { disabled, enabled, temporary, delete}; | |
47 | ||
48 | /* Not that the ->silent field is not currently used by any commands | |
49 | (though the code is in there if it was to be and set_raw_breakpoint | |
50 | does set it to 0). I implemented it because I thought it would be | |
51 | useful for a hack I had to put in; I'm going to leave it in because | |
52 | I can see how there might be times when it would indeed be useful */ | |
53 | ||
54 | struct breakpoint | |
55 | { | |
56 | struct breakpoint *next; | |
57 | /* Number assigned to distinguish breakpoints. */ | |
58 | int number; | |
59 | /* Address to break at. */ | |
60 | CORE_ADDR address; | |
61 | /* Line number of this address. Redundant. */ | |
62 | int line_number; | |
63 | /* Symtab of file of this address. Redundant. */ | |
64 | struct symtab *symtab; | |
65 | /* Zero means disabled; remember the info but don't break here. */ | |
66 | enum enable enable; | |
67 | /* Non-zero means a silent breakpoint (don't print frame info | |
68 | if we stop here). */ | |
69 | unsigned char silent; | |
70 | /* Number of stops at this breakpoint that should | |
71 | be continued automatically before really stopping. */ | |
72 | int ignore_count; | |
73 | /* "Real" contents of byte where breakpoint has been inserted. | |
74 | Valid only when breakpoints are in the program. */ | |
75 | char shadow_contents[sizeof break_insn]; | |
76 | /* Nonzero if this breakpoint is now inserted. */ | |
77 | char inserted; | |
78 | /* Nonzero if this is not the first breakpoint in the list | |
79 | for the given address. */ | |
80 | char duplicate; | |
81 | /* Chain of command lines to execute when this breakpoint is hit. */ | |
82 | struct command_line *commands; | |
83 | /* Stack depth (address of frame). If nonzero, break only if fp | |
84 | equals this. */ | |
85 | FRAME_ADDR frame; | |
86 | /* Conditional. Break only if this expression's value is nonzero. */ | |
87 | struct expression *cond; | |
88 | }; | |
89 | ||
90 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) | |
91 | ||
92 | /* Chain of all breakpoints defined. */ | |
93 | ||
94 | struct breakpoint *breakpoint_chain; | |
95 | ||
96 | /* Number of last breakpoint made. */ | |
97 | ||
98 | static int breakpoint_count; | |
99 | ||
100 | /* Default address, symtab and line to put a breakpoint at | |
101 | for "break" command with no arg. | |
102 | if default_breakpoint_valid is zero, the other three are | |
103 | not valid, and "break" with no arg is an error. | |
104 | ||
105 | This set by print_stack_frame, which calls set_default_breakpoint. */ | |
106 | ||
107 | int default_breakpoint_valid; | |
108 | CORE_ADDR default_breakpoint_address; | |
109 | struct symtab *default_breakpoint_symtab; | |
110 | int default_breakpoint_line; | |
111 | ||
112 | /* Remaining commands (not yet executed) | |
113 | of last breakpoint hit. */ | |
114 | ||
115 | struct command_line *breakpoint_commands; | |
116 | ||
117 | static void delete_breakpoint (); | |
118 | void clear_momentary_breakpoints (); | |
119 | void breakpoint_auto_delete (); | |
120 | ||
121 | /* Flag indicating extra verbosity for xgdb. */ | |
122 | extern int xgdb_verbose; | |
123 | \f | |
124 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ | |
125 | ||
126 | static void | |
127 | condition_command (arg, from_tty) | |
128 | char *arg; | |
129 | int from_tty; | |
130 | { | |
131 | register struct breakpoint *b; | |
132 | register char *p; | |
133 | register int bnum; | |
134 | register struct expression *expr; | |
135 | ||
136 | if (arg == 0) | |
137 | error_no_arg ("breakpoint number"); | |
138 | ||
139 | p = arg; | |
140 | while (*p >= '0' && *p <= '9') p++; | |
141 | if (p == arg) | |
142 | /* There is no number here. (e.g. "cond a == b"). */ | |
143 | error_no_arg ("breakpoint number"); | |
144 | bnum = atoi (arg); | |
145 | ||
146 | ALL_BREAKPOINTS (b) | |
147 | if (b->number == bnum) | |
148 | { | |
149 | if (b->cond) | |
150 | { | |
151 | free (b->cond); | |
152 | b->cond = 0; /* parse_c_1 can leave this unchanged. */ | |
153 | } | |
154 | if (*p == 0) | |
155 | { | |
156 | b->cond = 0; | |
157 | if (from_tty) | |
158 | printf ("Breakpoint %d now unconditional.\n", bnum); | |
159 | } | |
160 | else | |
161 | { | |
162 | if (*p != ' ' && *p != '\t') | |
163 | error ("Arguments must be an integer (breakpoint number) and an expression."); | |
164 | ||
165 | /* Find start of expression */ | |
166 | while (*p == ' ' || *p == '\t') p++; | |
167 | ||
168 | arg = p; | |
169 | b->cond = (struct expression *) parse_c_1 (&arg, block_for_pc (b->address), 0); | |
170 | if (*arg) | |
171 | error ("Junk at end of expression"); | |
172 | } | |
173 | return; | |
174 | } | |
175 | ||
176 | error ("No breakpoint number %d.", bnum); | |
177 | } | |
178 | ||
179 | static void | |
180 | commands_command (arg, from_tty) | |
181 | char *arg; | |
182 | int from_tty; | |
183 | { | |
184 | register struct breakpoint *b; | |
185 | register char *p, *p1; | |
186 | register int bnum; | |
187 | struct command_line *l; | |
188 | ||
189 | /* If we allowed this, we would have problems with when to | |
190 | free the storage, if we change the commands currently | |
191 | being read from. */ | |
192 | ||
193 | if (breakpoint_commands) | |
194 | error ("Can't use the \"commands\" command among a breakpoint's commands."); | |
195 | ||
196 | /* Allow commands by itself to refer to the last breakpoint. */ | |
197 | if (arg == 0) | |
198 | bnum = breakpoint_count; | |
199 | else | |
200 | { | |
201 | p = arg; | |
202 | if (! (*p >= '0' && *p <= '9')) | |
203 | error ("Argument must be integer (a breakpoint number)."); | |
204 | ||
205 | while (*p >= '0' && *p <= '9') p++; | |
206 | if (*p) | |
207 | error ("Unexpected extra arguments following breakpoint number."); | |
208 | ||
209 | bnum = atoi (arg); | |
210 | } | |
211 | ||
212 | ALL_BREAKPOINTS (b) | |
213 | if (b->number == bnum) | |
214 | { | |
215 | if (from_tty && input_from_terminal_p ()) | |
216 | { | |
217 | printf ("Type commands for when breakpoint %d is hit, one per line.\n\ | |
218 | End with a line saying just \"end\".\n", bnum); | |
219 | fflush (stdout); | |
220 | } | |
221 | l = read_command_lines (from_tty); | |
222 | free_command_lines (b->commands); | |
223 | b->commands = l; | |
224 | return; | |
225 | } | |
226 | error ("No breakpoint number %d.", bnum); | |
227 | } | |
228 | ||
229 | /* Called from command loop to execute the commands | |
230 | associated with the breakpoint we just stopped at. */ | |
231 | ||
232 | void | |
233 | do_breakpoint_commands () | |
234 | { | |
235 | struct command_line *cmd; | |
236 | ||
237 | while (cmd = breakpoint_commands) | |
238 | { | |
239 | breakpoint_commands = 0; | |
240 | execute_command_lines(cmd); | |
241 | /* If command was "cont", breakpoint_commands is now 0, | |
242 | of if we stopped at yet another breakpoint which has commands, | |
243 | it is now the commands for the new breakpoint. */ | |
244 | } | |
245 | clear_momentary_breakpoints (); | |
246 | } | |
247 | ||
248 | /* Used when the program is proceeded, to eliminate any remaining | |
249 | commands attached to the previous breakpoint we stopped at. */ | |
250 | ||
251 | void | |
252 | clear_breakpoint_commands () | |
253 | { | |
254 | breakpoint_commands = 0; | |
255 | breakpoint_auto_delete (0); | |
256 | } | |
257 | ||
258 | /* Functions to get and set the current list of pending | |
259 | breakpoint commands. These are used by run_stack_dummy | |
260 | to preserve the commands around a function call. */ | |
261 | ||
262 | struct command_line * | |
263 | get_breakpoint_commands () | |
264 | { | |
265 | return breakpoint_commands; | |
266 | } | |
267 | ||
268 | void | |
269 | set_breakpoint_commands (cmds) | |
270 | struct command_line *cmds; | |
271 | { | |
272 | breakpoint_commands = cmds; | |
273 | } | |
274 | \f | |
275 | /* insert_breakpoints is used when starting or continuing the program. | |
276 | remove_breakpoints is used when the program stops. | |
277 | Both return zero if successful, | |
278 | or an `errno' value if could not write the inferior. */ | |
279 | ||
280 | int | |
281 | insert_breakpoints () | |
282 | { | |
283 | register struct breakpoint *b; | |
284 | int val; | |
285 | ||
286 | #ifdef BREAKPOINT_DEBUG | |
287 | printf ("Inserting breakpoints.\n"); | |
288 | #endif /* BREAKPOINT_DEBUG */ | |
289 | ||
290 | ALL_BREAKPOINTS (b) | |
291 | if (b->enable != disabled && ! b->inserted && ! b->duplicate) | |
292 | { | |
293 | read_memory (b->address, b->shadow_contents, sizeof break_insn); | |
294 | val = write_memory (b->address, break_insn, sizeof break_insn); | |
295 | if (val) | |
296 | return val; | |
297 | #ifdef BREAKPOINT_DEBUG | |
298 | printf ("Inserted breakpoint at 0x%x, shadow 0x%x, 0x%x.\n", | |
299 | b->address, b->shadow_contents[0], b->shadow_contents[1]); | |
300 | #endif /* BREAKPOINT_DEBUG */ | |
301 | b->inserted = 1; | |
302 | } | |
303 | return 0; | |
304 | } | |
305 | ||
306 | int | |
307 | remove_breakpoints () | |
308 | { | |
309 | register struct breakpoint *b; | |
310 | int val; | |
311 | ||
312 | #ifdef BREAKPOINT_DEBUG | |
313 | printf ("Removing breakpoints.\n"); | |
314 | #endif /* BREAKPOINT_DEBUG */ | |
315 | ||
316 | ALL_BREAKPOINTS (b) | |
317 | if (b->inserted) | |
318 | { | |
319 | val = write_memory (b->address, b->shadow_contents, sizeof break_insn); | |
320 | if (val) | |
321 | return val; | |
322 | b->inserted = 0; | |
323 | #ifdef BREAKPOINT_DEBUG | |
324 | printf ("Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n", | |
325 | b->address, b->shadow_contents[0], b->shadow_contents[1]); | |
326 | #endif /* BREAKPOINT_DEBUG */ | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | /* Clear the "inserted" flag in all breakpoints. | |
333 | This is done when the inferior is loaded. */ | |
334 | ||
335 | void | |
336 | mark_breakpoints_out () | |
337 | { | |
338 | register struct breakpoint *b; | |
339 | ||
340 | ALL_BREAKPOINTS (b) | |
341 | b->inserted = 0; | |
342 | } | |
343 | ||
344 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. | |
345 | When continuing from a location with a breakpoint, | |
346 | we actually single step once before calling insert_breakpoints. */ | |
347 | ||
348 | int | |
349 | breakpoint_here_p (pc) | |
350 | CORE_ADDR pc; | |
351 | { | |
352 | register struct breakpoint *b; | |
353 | ||
354 | ALL_BREAKPOINTS (b) | |
355 | if (b->enable != disabled && b->address == pc) | |
356 | return 1; | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | /* Evaluate the expression EXP and return 1 if value is zero. | |
362 | This is used inside a catch_errors to evaluate the breakpoint condition. */ | |
363 | ||
364 | int | |
365 | breakpoint_cond_eval (exp) | |
366 | struct expression *exp; | |
367 | { | |
368 | return value_zerop (evaluate_expression (exp)); | |
369 | } | |
370 | ||
371 | /* Return 0 if PC is not the address just after a breakpoint, | |
372 | or -1 if breakpoint says do not stop now, | |
373 | or -2 if breakpoint says it has deleted itself and don't stop, | |
374 | or -3 if hit a breakpoint number -3 (delete when program stops), | |
375 | or else the number of the breakpoint, | |
376 | with 0x1000000 added (or subtracted, for a negative return value) for | |
377 | a silent breakpoint. */ | |
378 | ||
379 | int | |
380 | breakpoint_stop_status (pc, frame_address) | |
381 | CORE_ADDR pc; | |
382 | FRAME_ADDR frame_address; | |
383 | { | |
384 | register struct breakpoint *b; | |
385 | register int cont = 0; | |
386 | ||
387 | /* Get the address where the breakpoint would have been. */ | |
388 | pc -= DECR_PC_AFTER_BREAK; | |
389 | ||
390 | ALL_BREAKPOINTS (b) | |
391 | if (b->enable != disabled && b->address == pc) | |
392 | { | |
393 | if (b->frame && b->frame != frame_address) | |
394 | cont = -1; | |
395 | else | |
396 | { | |
397 | int value_zero; | |
398 | if (b->cond) | |
399 | { | |
400 | /* Need to select the frame, with all that implies | |
401 | so that the conditions will have the right context. */ | |
402 | select_frame (get_current_frame (), 0); | |
403 | value_zero | |
404 | = catch_errors (breakpoint_cond_eval, b->cond, | |
405 | "Error occurred in testing breakpoint condition."); | |
406 | free_all_values (); | |
407 | } | |
408 | if (b->cond && value_zero) | |
409 | { | |
410 | cont = -1; | |
411 | } | |
412 | else if (b->ignore_count > 0) | |
413 | { | |
414 | b->ignore_count--; | |
415 | cont = -1; | |
416 | } | |
417 | else | |
418 | { | |
419 | if (b->enable == temporary) | |
420 | b->enable = disabled; | |
421 | breakpoint_commands = b->commands; | |
422 | if (b->silent | |
423 | || (breakpoint_commands | |
424 | && !strcmp ("silent", breakpoint_commands->line))) | |
425 | { | |
426 | if (breakpoint_commands) | |
427 | breakpoint_commands = breakpoint_commands->next; | |
428 | return (b->number > 0 ? | |
429 | 0x1000000 + b->number : | |
430 | b->number - 0x1000000); | |
431 | } | |
432 | return b->number; | |
433 | } | |
434 | } | |
435 | } | |
436 | ||
437 | return cont; | |
438 | } | |
439 | \f | |
440 | static void | |
441 | breakpoint_1 (bnum) | |
442 | int bnum; | |
443 | { | |
444 | register struct breakpoint *b; | |
445 | register struct command_line *l; | |
446 | register struct symbol *sym; | |
447 | CORE_ADDR last_addr = (CORE_ADDR)-1; | |
448 | ||
449 | ALL_BREAKPOINTS (b) | |
450 | if (bnum == -1 || bnum == b->number) | |
451 | { | |
452 | printf_filtered ("#%-3d %c 0x%08x", b->number, | |
453 | "nyod"[(int) b->enable], | |
454 | b->address); | |
455 | last_addr = b->address; | |
456 | if (b->symtab) | |
457 | { | |
458 | sym = find_pc_function (b->address); | |
459 | if (sym) | |
460 | { | |
461 | fputs_filtered (" in ", stdout); | |
462 | fputs_demangled (SYMBOL_NAME (sym), stdout, 1); | |
463 | fputs_filtered (" (", stdout); | |
464 | } | |
465 | fputs_filtered (b->symtab->filename, stdout); | |
466 | printf_filtered (" line %d", b->line_number); | |
467 | if (sym) fputs_filtered(")", stdout); | |
468 | } | |
469 | else | |
470 | print_address_symbolic (b->address, stdout); | |
471 | ||
472 | printf_filtered ("\n"); | |
473 | ||
474 | if (b->ignore_count) | |
475 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); | |
476 | if (b->frame) | |
477 | printf_filtered ("\tstop only in stack frame at 0x%x\n", b->frame); | |
478 | if (b->cond) | |
479 | { | |
480 | printf_filtered ("\tbreak only if "); | |
481 | print_expression (b->cond, stdout); | |
482 | printf_filtered ("\n"); | |
483 | } | |
484 | if (l = b->commands) | |
485 | while (l) | |
486 | { | |
487 | printf_filtered ("\t%s\n", l->line); | |
488 | l = l->next; | |
489 | } | |
490 | } | |
491 | ||
492 | /* Compare against (CORE_ADDR)-1 in case some compiler decides | |
493 | that a comparison of an unsigned with -1 is always false. */ | |
494 | if (last_addr != (CORE_ADDR)-1) | |
495 | set_next_address (last_addr); | |
496 | } | |
497 | ||
498 | static void | |
499 | breakpoints_info (bnum_exp) | |
500 | char *bnum_exp; | |
501 | { | |
502 | int bnum = -1; | |
503 | ||
504 | if (bnum_exp) | |
505 | bnum = parse_and_eval_address (bnum_exp); | |
506 | else if (breakpoint_chain == 0) | |
507 | printf_filtered ("No breakpoints.\n"); | |
508 | else | |
509 | printf_filtered ("Breakpoints:\n\ | |
510 | Num Enb Address Where\n"); | |
511 | ||
512 | breakpoint_1 (bnum); | |
513 | } | |
514 | ||
515 | /* Print a message describing any breakpoints set at PC. */ | |
516 | ||
517 | static void | |
518 | describe_other_breakpoints (pc) | |
519 | register CORE_ADDR pc; | |
520 | { | |
521 | register int others = 0; | |
522 | register struct breakpoint *b; | |
523 | ||
524 | ALL_BREAKPOINTS (b) | |
525 | if (b->address == pc) | |
526 | others++; | |
527 | if (others > 0) | |
528 | { | |
529 | printf ("Note: breakpoint%s ", (others > 1) ? "s" : ""); | |
530 | ALL_BREAKPOINTS (b) | |
531 | if (b->address == pc) | |
532 | { | |
533 | others--; | |
534 | printf ("%d%s%s ", | |
535 | b->number, | |
536 | (b->enable == disabled) ? " (disabled)" : "", | |
537 | (others > 1) ? "," : ((others == 1) ? " and" : "")); | |
538 | } | |
539 | printf ("also set at pc 0x%x.\n", pc); | |
540 | } | |
541 | } | |
542 | \f | |
543 | /* Set the default place to put a breakpoint | |
544 | for the `break' command with no arguments. */ | |
545 | ||
546 | void | |
547 | set_default_breakpoint (valid, addr, symtab, line) | |
548 | int valid; | |
549 | CORE_ADDR addr; | |
550 | struct symtab *symtab; | |
551 | int line; | |
552 | { | |
553 | default_breakpoint_valid = valid; | |
554 | default_breakpoint_address = addr; | |
555 | default_breakpoint_symtab = symtab; | |
556 | default_breakpoint_line = line; | |
557 | } | |
558 | ||
559 | /* Rescan breakpoints at address ADDRESS, | |
560 | marking the first one as "first" and any others as "duplicates". | |
561 | This is so that the bpt instruction is only inserted once. */ | |
562 | ||
563 | static void | |
564 | check_duplicates (address) | |
565 | CORE_ADDR address; | |
566 | { | |
567 | register struct breakpoint *b; | |
568 | register int count = 0; | |
569 | ||
570 | ALL_BREAKPOINTS (b) | |
571 | if (b->enable != disabled && b->address == address) | |
572 | { | |
573 | count++; | |
574 | b->duplicate = count > 1; | |
575 | } | |
576 | } | |
577 | ||
578 | /* Low level routine to set a breakpoint. | |
579 | Takes as args the three things that every breakpoint must have. | |
580 | Returns the breakpoint object so caller can set other things. | |
581 | Does not set the breakpoint number! | |
582 | Does not print anything. */ | |
583 | ||
584 | static struct breakpoint * | |
585 | set_raw_breakpoint (sal) | |
586 | struct symtab_and_line sal; | |
587 | { | |
588 | register struct breakpoint *b, *b1; | |
589 | ||
590 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); | |
591 | bzero (b, sizeof *b); | |
592 | b->address = sal.pc; | |
593 | b->symtab = sal.symtab; | |
594 | b->line_number = sal.line; | |
595 | b->enable = enabled; | |
596 | b->next = 0; | |
597 | b->silent = 0; | |
598 | ||
599 | /* Add this breakpoint to the end of the chain | |
600 | so that a list of breakpoints will come out in order | |
601 | of increasing numbers. */ | |
602 | ||
603 | b1 = breakpoint_chain; | |
604 | if (b1 == 0) | |
605 | breakpoint_chain = b; | |
606 | else | |
607 | { | |
608 | while (b1->next) | |
609 | b1 = b1->next; | |
610 | b1->next = b; | |
611 | } | |
612 | ||
613 | check_duplicates (sal.pc); | |
614 | ||
615 | return b; | |
616 | } | |
617 | ||
618 | /* Set a breakpoint that will evaporate an end of command | |
619 | at address specified by SAL. | |
620 | Restrict it to frame FRAME if FRAME is nonzero. */ | |
621 | ||
622 | void | |
623 | set_momentary_breakpoint (sal, frame) | |
624 | struct symtab_and_line sal; | |
625 | FRAME frame; | |
626 | { | |
627 | register struct breakpoint *b; | |
628 | b = set_raw_breakpoint (sal); | |
629 | b->number = -3; | |
630 | b->enable = delete; | |
631 | b->frame = (frame ? FRAME_FP (frame) : 0); | |
632 | } | |
633 | ||
634 | void | |
635 | clear_momentary_breakpoints () | |
636 | { | |
637 | register struct breakpoint *b; | |
638 | ALL_BREAKPOINTS (b) | |
639 | if (b->number == -3) | |
640 | { | |
641 | delete_breakpoint (b); | |
642 | break; | |
643 | } | |
644 | } | |
645 | \f | |
646 | /* Set a breakpoint from a symtab and line. | |
647 | If TEMPFLAG is nonzero, it is a temporary breakpoint. | |
648 | Print the same confirmation messages that the breakpoint command prints. */ | |
649 | ||
650 | void | |
651 | set_breakpoint (s, line, tempflag) | |
652 | struct symtab *s; | |
653 | int line; | |
654 | int tempflag; | |
655 | { | |
656 | register struct breakpoint *b; | |
657 | struct symtab_and_line sal; | |
658 | ||
659 | sal.symtab = s; | |
660 | sal.line = line; | |
661 | sal.pc = find_line_pc (sal.symtab, sal.line); | |
662 | if (sal.pc == 0) | |
663 | error ("No line %d in file \"%s\".\n", sal.line, sal.symtab->filename); | |
664 | else | |
665 | { | |
666 | describe_other_breakpoints (sal.pc); | |
667 | ||
668 | b = set_raw_breakpoint (sal); | |
669 | b->number = ++breakpoint_count; | |
670 | b->cond = 0; | |
671 | if (tempflag) | |
672 | b->enable = temporary; | |
673 | ||
674 | printf ("Breakpoint %d at 0x%x", b->number, b->address); | |
675 | if (b->symtab) | |
676 | printf (": file %s, line %d.", b->symtab->filename, b->line_number); | |
677 | printf ("\n"); | |
678 | } | |
679 | } | |
680 | \f | |
681 | /* Set a breakpoint according to ARG (function, linenum or *address) | |
682 | and make it temporary if TEMPFLAG is nonzero. */ | |
683 | ||
684 | static void | |
685 | break_command_1 (arg, tempflag, from_tty) | |
686 | char *arg; | |
687 | int tempflag, from_tty; | |
688 | { | |
689 | struct symtabs_and_lines sals; | |
690 | struct symtab_and_line sal; | |
691 | register struct expression *cond = 0; | |
692 | register struct breakpoint *b; | |
693 | char *save_arg; | |
694 | int i; | |
695 | CORE_ADDR pc; | |
696 | ||
697 | sals.sals = NULL; | |
698 | sals.nelts = 0; | |
699 | ||
700 | sal.line = sal.pc = sal.end = 0; | |
701 | sal.symtab = 0; | |
702 | ||
703 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ | |
704 | ||
705 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
706 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
707 | { | |
708 | if (default_breakpoint_valid) | |
709 | { | |
710 | sals.sals = (struct symtab_and_line *) | |
711 | malloc (sizeof (struct symtab_and_line)); | |
712 | sal.pc = default_breakpoint_address; | |
713 | sal.line = default_breakpoint_line; | |
714 | sal.symtab = default_breakpoint_symtab; | |
715 | sals.sals[0] = sal; | |
716 | sals.nelts = 1; | |
717 | } | |
718 | else | |
719 | error ("No default breakpoint address now."); | |
720 | } | |
721 | else | |
722 | /* Force almost all breakpoints to be in terms of the | |
723 | current_source_symtab (which is decode_line_1's default). This | |
724 | should produce the results we want almost all of the time while | |
725 | leaving default_breakpoint_* alone. */ | |
726 | if (default_breakpoint_valid | |
727 | && (!current_source_symtab | |
728 | || (arg && (*arg == '+' || *arg == '-')))) | |
729 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
730 | default_breakpoint_line); | |
731 | else | |
732 | sals = decode_line_1 (&arg, 1, 0, 0); | |
733 | ||
734 | if (! sals.nelts) | |
735 | return; | |
736 | ||
737 | save_arg = arg; | |
738 | for (i = 0; i < sals.nelts; i++) | |
739 | { | |
740 | sal = sals.sals[i]; | |
741 | if (sal.pc == 0 && sal.symtab != 0) | |
742 | { | |
743 | pc = find_line_pc (sal.symtab, sal.line); | |
744 | if (pc == 0) | |
745 | error ("No line %d in file \"%s\".", | |
746 | sal.line, sal.symtab->filename); | |
747 | } | |
748 | else | |
749 | pc = sal.pc; | |
750 | ||
751 | while (arg && *arg) | |
752 | { | |
753 | if (arg[0] == 'i' && arg[1] == 'f' | |
754 | && (arg[2] == ' ' || arg[2] == '\t')) | |
755 | cond = (struct expression *) parse_c_1 ((arg += 2, &arg), | |
756 | block_for_pc (pc), 0); | |
757 | else | |
758 | error ("Junk at end of arguments."); | |
759 | } | |
760 | arg = save_arg; | |
761 | sals.sals[i].pc = pc; | |
762 | } | |
763 | ||
764 | for (i = 0; i < sals.nelts; i++) | |
765 | { | |
766 | sal = sals.sals[i]; | |
767 | ||
768 | if (from_tty) | |
769 | describe_other_breakpoints (sal.pc); | |
770 | ||
771 | b = set_raw_breakpoint (sal); | |
772 | b->number = ++breakpoint_count; | |
773 | b->cond = cond; | |
774 | if (tempflag) | |
775 | b->enable = temporary; | |
776 | ||
777 | printf ("Breakpoint %d at 0x%x", b->number, b->address); | |
778 | if (b->symtab) | |
779 | printf (": file %s, line %d.", b->symtab->filename, b->line_number); | |
780 | printf ("\n"); | |
781 | } | |
782 | ||
783 | if (sals.nelts > 1) | |
784 | { | |
785 | printf ("Multiple breakpoints were set.\n"); | |
786 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
787 | } | |
788 | free (sals.sals); | |
789 | } | |
790 | ||
791 | static void | |
792 | break_command (arg, from_tty) | |
793 | char *arg; | |
794 | int from_tty; | |
795 | { | |
796 | break_command_1 (arg, 0, from_tty); | |
797 | } | |
798 | ||
799 | static void | |
800 | tbreak_command (arg, from_tty) | |
801 | char *arg; | |
802 | int from_tty; | |
803 | { | |
804 | break_command_1 (arg, 1, from_tty); | |
805 | } | |
806 | \f | |
807 | /* | |
808 | * Helper routine for the until_command routine in infcmd.c. Here | |
809 | * because it uses the mechanisms of breakpoints. | |
810 | */ | |
811 | void | |
812 | until_break_command (arg, from_tty) | |
813 | char *arg; | |
814 | int from_tty; | |
815 | { | |
816 | struct symtabs_and_lines sals; | |
817 | struct symtab_and_line sal; | |
818 | FRAME prev_frame = get_prev_frame (selected_frame); | |
819 | ||
820 | clear_proceed_status (); | |
821 | ||
822 | /* Set a breakpoint where the user wants it and at return from | |
823 | this function */ | |
824 | ||
825 | if (default_breakpoint_valid) | |
826 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
827 | default_breakpoint_line); | |
828 | else | |
829 | sals = decode_line_1 (&arg, 1, 0, 0); | |
830 | ||
831 | if (sals.nelts != 1) | |
832 | error ("Couldn't get information on specified line."); | |
833 | ||
834 | sal = sals.sals[0]; | |
835 | free (sals.sals); /* malloc'd, so freed */ | |
836 | ||
837 | if (*arg) | |
838 | error ("Junk at end of arguments."); | |
839 | ||
840 | if (sal.pc == 0 && sal.symtab != 0) | |
841 | sal.pc = find_line_pc (sal.symtab, sal.line); | |
842 | ||
843 | if (sal.pc == 0) | |
844 | error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename); | |
845 | ||
846 | set_momentary_breakpoint (sal, selected_frame); | |
847 | ||
848 | /* Keep within the current frame */ | |
849 | ||
850 | if (prev_frame) | |
851 | { | |
852 | struct frame_info *fi; | |
853 | ||
854 | fi = get_frame_info (prev_frame); | |
855 | sal = find_pc_line (fi->pc, 0); | |
856 | sal.pc = fi->pc; | |
857 | set_momentary_breakpoint (sal, prev_frame); | |
858 | } | |
859 | ||
860 | proceed (-1, -1, 0); | |
861 | } | |
862 | \f | |
863 | static void | |
864 | clear_command (arg, from_tty) | |
865 | char *arg; | |
866 | int from_tty; | |
867 | { | |
868 | register struct breakpoint *b, *b1; | |
869 | struct symtabs_and_lines sals; | |
870 | struct symtab_and_line sal; | |
871 | register struct breakpoint *found; | |
872 | int i; | |
873 | ||
874 | if (arg) | |
875 | { | |
876 | sals = decode_line_spec (arg, 1); | |
877 | } | |
878 | else | |
879 | { | |
880 | sals.sals = (struct symtab_and_line *) malloc (sizeof (struct symtab_and_line)); | |
881 | sal.line = default_breakpoint_line; | |
882 | sal.symtab = default_breakpoint_symtab; | |
883 | sal.pc = 0; | |
884 | if (sal.symtab == 0) | |
885 | error ("No source file specified."); | |
886 | ||
887 | sals.sals[0] = sal; | |
888 | sals.nelts = 1; | |
889 | } | |
890 | ||
891 | for (i = 0; i < sals.nelts; i++) | |
892 | { | |
893 | /* If exact pc given, clear bpts at that pc. | |
894 | But if sal.pc is zero, clear all bpts on specified line. */ | |
895 | sal = sals.sals[i]; | |
896 | found = (struct breakpoint *) 0; | |
897 | while (breakpoint_chain | |
898 | && (sal.pc ? breakpoint_chain->address == sal.pc | |
899 | : (breakpoint_chain->symtab == sal.symtab | |
900 | && breakpoint_chain->line_number == sal.line))) | |
901 | { | |
902 | b1 = breakpoint_chain; | |
903 | breakpoint_chain = b1->next; | |
904 | b1->next = found; | |
905 | found = b1; | |
906 | } | |
907 | ||
908 | ALL_BREAKPOINTS (b) | |
909 | while (b->next | |
910 | && (sal.pc ? b->next->address == sal.pc | |
911 | : (b->next->symtab == sal.symtab | |
912 | && b->next->line_number == sal.line))) | |
913 | { | |
914 | b1 = b->next; | |
915 | b->next = b1->next; | |
916 | b1->next = found; | |
917 | found = b1; | |
918 | } | |
919 | ||
920 | if (found == 0) | |
921 | error ("No breakpoint at %s.", arg); | |
922 | ||
923 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ | |
924 | if (from_tty) printf ("Deleted breakpoint%s ", found->next ? "s" : ""); | |
925 | while (found) | |
926 | { | |
927 | if (from_tty) printf ("%d ", found->number); | |
928 | b1 = found->next; | |
929 | delete_breakpoint (found); | |
930 | found = b1; | |
931 | } | |
932 | if (from_tty) putchar ('\n'); | |
933 | } | |
934 | free (sals.sals); | |
935 | } | |
936 | \f | |
937 | /* Delete breakpoint number BNUM if it is a `delete' breakpoint. | |
938 | This is called after breakpoint BNUM has been hit. | |
939 | Also delete any breakpoint numbered -3 unless there are breakpoint | |
940 | commands to be executed. */ | |
941 | ||
942 | void | |
943 | breakpoint_auto_delete (bnum) | |
944 | int bnum; | |
945 | { | |
946 | register struct breakpoint *b; | |
947 | if (bnum != 0) | |
948 | ALL_BREAKPOINTS (b) | |
949 | if (b->number == bnum) | |
950 | { | |
951 | if (b->enable == delete) | |
952 | delete_breakpoint (b); | |
953 | break; | |
954 | } | |
955 | if (breakpoint_commands == 0) | |
956 | clear_momentary_breakpoints (); | |
957 | } | |
958 | ||
959 | static void | |
960 | delete_breakpoint (bpt) | |
961 | struct breakpoint *bpt; | |
962 | { | |
963 | register struct breakpoint *b; | |
964 | ||
965 | if (bpt->inserted) | |
966 | write_memory (bpt->address, bpt->shadow_contents, sizeof break_insn); | |
967 | ||
968 | if (breakpoint_chain == bpt) | |
969 | breakpoint_chain = bpt->next; | |
970 | ||
971 | ALL_BREAKPOINTS (b) | |
972 | if (b->next == bpt) | |
973 | { | |
974 | b->next = bpt->next; | |
975 | break; | |
976 | } | |
977 | ||
978 | check_duplicates (bpt->address); | |
979 | ||
980 | free_command_lines (bpt->commands); | |
981 | if (bpt->cond) | |
982 | free (bpt->cond); | |
983 | ||
984 | if (xgdb_verbose && bpt->number >=0) | |
985 | printf ("breakpoint #%d deleted\n", bpt->number); | |
986 | ||
987 | free (bpt); | |
988 | } | |
989 | ||
990 | static void map_breakpoint_numbers (); | |
991 | ||
992 | static void | |
993 | delete_command (arg, from_tty) | |
994 | char *arg; | |
995 | int from_tty; | |
996 | { | |
997 | register struct breakpoint *b, *b1; | |
998 | ||
999 | if (arg == 0) | |
1000 | { | |
1001 | /* Ask user only if there are some breakpoints to delete. */ | |
1002 | if (!from_tty | |
1003 | || breakpoint_chain && query ("Delete all breakpoints? ")) | |
1004 | { | |
1005 | /* No arg; clear all breakpoints. */ | |
1006 | while (breakpoint_chain) | |
1007 | delete_breakpoint (breakpoint_chain); | |
1008 | } | |
1009 | } | |
1010 | else | |
1011 | map_breakpoint_numbers (arg, delete_breakpoint); | |
1012 | } | |
1013 | ||
1014 | /* Delete all breakpoints. | |
1015 | Done when new symtabs are loaded, since the break condition expressions | |
1016 | may become invalid, and the breakpoints are probably wrong anyway. */ | |
1017 | ||
1018 | void | |
1019 | clear_breakpoints () | |
1020 | { | |
1021 | delete_command (0, 0); | |
1022 | } | |
1023 | \f | |
1024 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |
1025 | If from_tty is nonzero, it prints a message to that effect, | |
1026 | which ends with a period (no newline). */ | |
1027 | ||
1028 | void | |
1029 | set_ignore_count (bptnum, count, from_tty) | |
1030 | int bptnum, count, from_tty; | |
1031 | { | |
1032 | register struct breakpoint *b; | |
1033 | ||
1034 | if (count < 0) | |
1035 | count = 0; | |
1036 | ||
1037 | ALL_BREAKPOINTS (b) | |
1038 | if (b->number == bptnum) | |
1039 | { | |
1040 | b->ignore_count = count; | |
1041 | if (!from_tty) | |
1042 | return; | |
1043 | else if (count == 0) | |
1044 | printf ("Will stop next time breakpoint %d is reached.", bptnum); | |
1045 | else if (count == 1) | |
1046 | printf ("Will ignore next crossing of breakpoint %d.", bptnum); | |
1047 | else | |
1048 | printf ("Will ignore next %d crossings of breakpoint %d.", | |
1049 | count, bptnum); | |
1050 | return; | |
1051 | } | |
1052 | ||
1053 | error ("No breakpoint number %d.", bptnum); | |
1054 | } | |
1055 | ||
1056 | /* Clear the ignore counts of all breakpoints. */ | |
1057 | void | |
1058 | breakpoint_clear_ignore_counts () | |
1059 | { | |
1060 | struct breakpoint *b; | |
1061 | ||
1062 | ALL_BREAKPOINTS (b) | |
1063 | b->ignore_count = 0; | |
1064 | } | |
1065 | ||
1066 | /* Command to set ignore-count of breakpoint N to COUNT. */ | |
1067 | ||
1068 | static void | |
1069 | ignore_command (args, from_tty) | |
1070 | char *args; | |
1071 | int from_tty; | |
1072 | { | |
1073 | register char *p = args; | |
1074 | register int num; | |
1075 | ||
1076 | if (p == 0) | |
1077 | error_no_arg ("a breakpoint number"); | |
1078 | ||
1079 | while (*p >= '0' && *p <= '9') p++; | |
1080 | if (*p && *p != ' ' && *p != '\t') | |
1081 | error ("First argument must be a breakpoint number."); | |
1082 | ||
1083 | num = atoi (args); | |
1084 | ||
1085 | if (*p == 0) | |
1086 | error ("Second argument (specified ignore-count) is missing."); | |
1087 | ||
1088 | set_ignore_count (num, parse_and_eval_address (p), from_tty); | |
1089 | printf ("\n"); | |
1090 | } | |
1091 | \f | |
1092 | /* Call FUNCTION on each of the breakpoints | |
1093 | whose numbers are given in ARGS. */ | |
1094 | ||
1095 | static void | |
1096 | map_breakpoint_numbers (args, function) | |
1097 | char *args; | |
1098 | void (*function) (); | |
1099 | { | |
1100 | register char *p = args; | |
1101 | register char *p1; | |
1102 | register int num; | |
1103 | register struct breakpoint *b; | |
1104 | ||
1105 | if (p == 0) | |
1106 | error_no_arg ("one or more breakpoint numbers"); | |
1107 | ||
1108 | while (*p) | |
1109 | { | |
1110 | p1 = p; | |
1111 | while (*p1 >= '0' && *p1 <= '9') p1++; | |
1112 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
1113 | error ("Arguments must be breakpoint numbers."); | |
1114 | ||
1115 | num = atoi (p); | |
1116 | ||
1117 | ALL_BREAKPOINTS (b) | |
1118 | if (b->number == num) | |
1119 | { | |
1120 | function (b); | |
1121 | goto win; | |
1122 | } | |
1123 | printf ("No breakpoint number %d.\n", num); | |
1124 | win: | |
1125 | p = p1; | |
1126 | while (*p == ' ' || *p == '\t') p++; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | static void | |
1131 | enable_breakpoint (bpt) | |
1132 | struct breakpoint *bpt; | |
1133 | { | |
1134 | bpt->enable = enabled; | |
1135 | ||
1136 | if (xgdb_verbose && bpt->number >= 0) | |
1137 | printf ("breakpoint #%d enabled\n", bpt->number); | |
1138 | ||
1139 | check_duplicates (bpt->address); | |
1140 | } | |
1141 | ||
1142 | static void | |
1143 | enable_command (args) | |
1144 | char *args; | |
1145 | { | |
1146 | struct breakpoint *bpt; | |
1147 | if (args == 0) | |
1148 | ALL_BREAKPOINTS (bpt) | |
1149 | enable_breakpoint (bpt); | |
1150 | else | |
1151 | map_breakpoint_numbers (args, enable_breakpoint); | |
1152 | } | |
1153 | ||
1154 | static void | |
1155 | disable_breakpoint (bpt) | |
1156 | struct breakpoint *bpt; | |
1157 | { | |
1158 | bpt->enable = disabled; | |
1159 | ||
1160 | if (xgdb_verbose && bpt->number >= 0) | |
1161 | printf ("breakpoint #%d disabled\n", bpt->number); | |
1162 | ||
1163 | check_duplicates (bpt->address); | |
1164 | } | |
1165 | ||
1166 | static void | |
1167 | disable_command (args) | |
1168 | char *args; | |
1169 | { | |
1170 | register struct breakpoint *bpt; | |
1171 | if (args == 0) | |
1172 | ALL_BREAKPOINTS (bpt) | |
1173 | disable_breakpoint (bpt); | |
1174 | else | |
1175 | map_breakpoint_numbers (args, disable_breakpoint); | |
1176 | } | |
1177 | ||
1178 | static void | |
1179 | enable_once_breakpoint (bpt) | |
1180 | struct breakpoint *bpt; | |
1181 | { | |
1182 | bpt->enable = temporary; | |
1183 | ||
1184 | check_duplicates (bpt->address); | |
1185 | } | |
1186 | ||
1187 | static void | |
1188 | enable_once_command (args) | |
1189 | char *args; | |
1190 | { | |
1191 | map_breakpoint_numbers (args, enable_once_breakpoint); | |
1192 | } | |
1193 | ||
1194 | static void | |
1195 | enable_delete_breakpoint (bpt) | |
1196 | struct breakpoint *bpt; | |
1197 | { | |
1198 | bpt->enable = delete; | |
1199 | ||
1200 | check_duplicates (bpt->address); | |
1201 | } | |
1202 | ||
1203 | static void | |
1204 | enable_delete_command (args) | |
1205 | char *args; | |
1206 | { | |
1207 | map_breakpoint_numbers (args, enable_delete_breakpoint); | |
1208 | } | |
1209 | \f | |
1210 | /* | |
1211 | * Use default_breakpoint_'s, or nothing if they aren't valid. | |
1212 | */ | |
1213 | struct symtabs_and_lines | |
1214 | decode_line_spec_1 (string, funfirstline) | |
1215 | char *string; | |
1216 | int funfirstline; | |
1217 | { | |
1218 | struct symtabs_and_lines sals; | |
1219 | if (string == 0) | |
1220 | error ("Empty line specification."); | |
1221 | if (default_breakpoint_valid) | |
1222 | sals = decode_line_1 (&string, funfirstline, | |
1223 | default_breakpoint_symtab, default_breakpoint_line); | |
1224 | else | |
1225 | sals = decode_line_1 (&string, funfirstline, 0, 0); | |
1226 | if (*string) | |
1227 | error ("Junk at end of line specification: %s", string); | |
1228 | return sals; | |
1229 | } | |
1230 | \f | |
1231 | ||
1232 | /* Chain containing all defined enable commands. */ | |
1233 | ||
1234 | extern struct cmd_list_element | |
1235 | *enablelist, *disablelist, | |
1236 | *deletelist, *enablebreaklist; | |
1237 | ||
1238 | extern struct cmd_list_element *cmdlist; | |
1239 | ||
1240 | void | |
1241 | _initialize_breakpoint () | |
1242 | { | |
1243 | breakpoint_chain = 0; | |
1244 | breakpoint_count = 0; | |
1245 | ||
1246 | add_com ("ignore", class_breakpoint, ignore_command, | |
1247 | "Set ignore-count of breakpoint number N to COUNT."); | |
1248 | ||
1249 | add_com ("commands", class_breakpoint, commands_command, | |
1250 | "Set commands to be executed when a breakpoint is hit.\n\ | |
1251 | Give breakpoint number as argument after \"commands\".\n\ | |
1252 | With no argument, the targeted breakpoint is the last one set.\n\ | |
1253 | The commands themselves follow starting on the next line.\n\ | |
1254 | Type a line containing \"end\" to indicate the end of them.\n\ | |
1255 | Give \"silent\" as the first line to make the breakpoint silent;\n\ | |
1256 | then no output is printed when it is hit, except what the commands print."); | |
1257 | ||
1258 | add_com ("condition", class_breakpoint, condition_command, | |
1259 | "Specify breakpoint number N to break only if COND is true.\n\ | |
1260 | N is an integer; COND is a C expression to be evaluated whenever\n\ | |
1261 | breakpoint N is reached. Actually break only when COND is nonzero."); | |
1262 | ||
1263 | add_com ("tbreak", class_breakpoint, tbreak_command, | |
1264 | "Set a temporary breakpoint. Args like \"break\" command.\n\ | |
1265 | Like \"break\" except the breakpoint is only enabled temporarily,\n\ | |
1266 | so it will be disabled when hit. Equivalent to \"break\" followed\n\ | |
1267 | by using \"enable once\" on the breakpoint number."); | |
1268 | ||
1269 | add_prefix_cmd ("enable", class_breakpoint, enable_command, | |
1270 | "Enable some breakpoints or auto-display expressions.\n\ | |
1271 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
1272 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
1273 | This is used to cancel the effect of the \"disable\" command.\n\ | |
1274 | With a subcommand you can enable temporarily.\n\ | |
1275 | \n\ | |
1276 | The \"display\" subcommand applies to auto-displays instead of breakpoints.", | |
1277 | &enablelist, "enable ", 1, &cmdlist); | |
1278 | ||
1279 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, | |
1280 | "Enable some breakpoints or auto-display expressions.\n\ | |
1281 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
1282 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
1283 | This is used to cancel the effect of the \"disable\" command.\n\ | |
1284 | May be abbreviates to simply \"enable\".\n\ | |
1285 | With a subcommand you can enable temporarily.", | |
1286 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); | |
1287 | ||
1288 | add_cmd ("once", no_class, enable_once_command, | |
1289 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
1290 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ | |
1291 | See the \"tbreak\" command which sets a breakpoint and enables it once.", | |
1292 | &enablebreaklist); | |
1293 | ||
1294 | add_cmd ("delete", no_class, enable_delete_command, | |
1295 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
1296 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
1297 | &enablebreaklist); | |
1298 | ||
1299 | add_cmd ("delete", no_class, enable_delete_command, | |
1300 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
1301 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
1302 | &enablelist); | |
1303 | ||
1304 | add_cmd ("once", no_class, enable_once_command, | |
1305 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
1306 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ | |
1307 | See the \"tbreak\" command which sets a breakpoint and enables it once.", | |
1308 | &enablelist); | |
1309 | ||
1310 | add_prefix_cmd ("disable", class_breakpoint, disable_command, | |
1311 | "Disable some breakpoints or auto-display expressions.\n\ | |
1312 | Arguments are breakpoint numbers with spaces in between.\n\ | |
1313 | To disable all breakpoints, give no argument.\n\ | |
1314 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |
1315 | \n\ | |
1316 | The \"display\" subcommand applies to auto-displays instead of breakpoints.", | |
1317 | &disablelist, "disable ", 1, &cmdlist); | |
1318 | add_com_alias ("dis", "disable", class_breakpoint, 1); | |
1319 | add_com_alias ("disa", "disable", class_breakpoint, 1); | |
1320 | ||
1321 | add_abbrev_cmd ("breakpoints", class_breakpoint, disable_command, | |
1322 | "Disable some breakpoints or auto-display expressions.\n\ | |
1323 | Arguments are breakpoint numbers with spaces in between.\n\ | |
1324 | To disable all breakpoints, give no argument.\n\ | |
1325 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |
1326 | This command may be abbreviated \"disable\".", | |
1327 | &disablelist); | |
1328 | ||
1329 | add_prefix_cmd ("delete", class_breakpoint, delete_command, | |
1330 | "Delete some breakpoints or auto-display expressions.\n\ | |
1331 | Arguments are breakpoint numbers with spaces in between.\n\ | |
1332 | To delete all breakpoints, give no argument.\n\ | |
1333 | \n\ | |
1334 | Also a prefix command for deletion of other GDB objects.\n\ | |
1335 | The \"unset\" command is also an alias for \"delete\".", | |
1336 | &deletelist, "delete ", 1, &cmdlist); | |
1337 | add_com_alias ("d", "delete", class_breakpoint, 1); | |
1338 | add_com_alias ("unset", "delete", class_alias, 1); | |
1339 | ||
1340 | add_cmd ("breakpoints", class_alias, delete_command, | |
1341 | "Delete some breakpoints or auto-display expressions.\n\ | |
1342 | Arguments are breakpoint numbers with spaces in between.\n\ | |
1343 | To delete all breakpoints, give no argument.\n\ | |
1344 | This command may be abbreviated \"delete\".", | |
1345 | &deletelist); | |
1346 | ||
1347 | add_com ("clear", class_breakpoint, clear_command, | |
1348 | "Clear breakpoint at specified line or function.\n\ | |
1349 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
1350 | If line number is specified, all breakpoints in that line are cleared.\n\ | |
1351 | If function is specified, breakpoints at beginning of function are cleared.\n\ | |
1352 | If an address is specified, breakpoints at that address are cleared.\n\n\ | |
1353 | With no argument, clears all breakpoints in the line that the selected frame\n\ | |
1354 | is executing in.\n\ | |
1355 | \n\ | |
1356 | See also the \"delete\" command which clears breakpoints by number."); | |
1357 | ||
1358 | add_com ("break", class_breakpoint, break_command, | |
1359 | "Set breakpoint at specified line or function.\n\ | |
1360 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
1361 | If line number is specified, break at start of code for that line.\n\ | |
1362 | If function is specified, break at start of code for that function.\n\ | |
1363 | If an address is specified, break at that exact address.\n\ | |
1364 | With no arg, uses current execution address of selected stack frame.\n\ | |
1365 | This is useful for breaking on return to a stack frame.\n\ | |
1366 | \n\ | |
1367 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
1368 | \n\ | |
1369 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
1370 | add_com_alias ("b", "break", class_run, 1); | |
1371 | add_com_alias ("br", "break", class_run, 1); | |
1372 | add_com_alias ("bre", "break", class_run, 1); | |
1373 | add_com_alias ("brea", "break", class_run, 1); | |
1374 | ||
1375 | add_info ("breakpoints", breakpoints_info, | |
1376 | "Status of all breakpoints, or breakpoint number NUMBER.\n\ | |
1377 | Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\ | |
1378 | \"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\ | |
1379 | Then come the address and the file/line number.\n\n\ | |
1380 | Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
1381 | are set to the address of the last breakpoint listed."); | |
1382 | } | |
1383 |