Commit | Line | Data |
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bd5635a1 | 1 | /* Everything about breakpoints, for GDB. |
30875e1c | 2 | Copyright 1986, 1987, 1989, 1990, 1991, 1992 Free Software Foundation, Inc. |
bd5635a1 RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
bdbd5f50 | 6 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 7 | it under the terms of the GNU General Public License as published by |
bdbd5f50 JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
bd5635a1 | 10 | |
bdbd5f50 | 11 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
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 | |
bdbd5f50 JG |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 RP |
19 | |
20 | #include <stdio.h> | |
21 | #include <ctype.h> | |
22 | #include "defs.h" | |
bd5635a1 RP |
23 | #include "symtab.h" |
24 | #include "frame.h" | |
25 | #include "breakpoint.h" | |
30875e1c | 26 | #include "gdbtypes.h" |
bd5635a1 RP |
27 | #include "expression.h" |
28 | #include "gdbcore.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "value.h" | |
31 | #include "ctype.h" | |
32 | #include "command.h" | |
33 | #include "inferior.h" | |
34 | #include "target.h" | |
d3b9c0df | 35 | #include "language.h" |
bd5635a1 RP |
36 | #include <string.h> |
37 | ||
30875e1c SG |
38 | /* local function prototypes */ |
39 | ||
40 | static void | |
41 | catch_command_1 PARAMS ((char *, int, int)); | |
42 | ||
43 | static void | |
44 | enable_delete_command PARAMS ((char *, int)); | |
45 | ||
46 | static void | |
47 | enable_delete_breakpoint PARAMS ((struct breakpoint *)); | |
48 | ||
49 | static void | |
50 | enable_once_command PARAMS ((char *, int)); | |
51 | ||
52 | static void | |
53 | enable_once_breakpoint PARAMS ((struct breakpoint *)); | |
54 | ||
55 | static void | |
56 | disable_command PARAMS ((char *, int)); | |
57 | ||
58 | static void | |
59 | disable_breakpoint PARAMS ((struct breakpoint *)); | |
60 | ||
61 | static void | |
62 | enable_command PARAMS ((char *, int)); | |
63 | ||
64 | static void | |
65 | enable_breakpoint PARAMS ((struct breakpoint *)); | |
66 | ||
67 | static void | |
68 | map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *))); | |
69 | ||
70 | static void | |
71 | ignore_command PARAMS ((char *, int)); | |
72 | ||
73 | static int | |
74 | breakpoint_re_set_one PARAMS ((char *)); | |
75 | ||
76 | static void | |
77 | delete_command PARAMS ((char *, int)); | |
78 | ||
79 | static void | |
80 | clear_command PARAMS ((char *, int)); | |
81 | ||
82 | static void | |
83 | catch_command PARAMS ((char *, int)); | |
84 | ||
85 | static struct symtabs_and_lines | |
86 | get_catch_sals PARAMS ((int)); | |
87 | ||
88 | static void | |
89 | watch_command PARAMS ((char *, int)); | |
90 | ||
91 | static void | |
92 | tbreak_command PARAMS ((char *, int)); | |
93 | ||
94 | static void | |
95 | break_command_1 PARAMS ((char *, int, int)); | |
96 | ||
97 | static void | |
98 | mention PARAMS ((struct breakpoint *)); | |
99 | ||
100 | static struct breakpoint * | |
101 | set_raw_breakpoint PARAMS ((struct symtab_and_line)); | |
102 | ||
103 | static void | |
104 | check_duplicates PARAMS ((CORE_ADDR)); | |
105 | ||
106 | static void | |
107 | describe_other_breakpoints PARAMS ((CORE_ADDR)); | |
108 | ||
109 | static void | |
110 | watchpoints_info PARAMS ((char *, int)); | |
111 | ||
112 | static void | |
113 | breakpoints_info PARAMS ((char *, int)); | |
114 | ||
115 | static void | |
116 | breakpoint_1 PARAMS ((int, int)); | |
117 | ||
118 | static bpstat | |
119 | bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); | |
120 | ||
121 | static int | |
122 | breakpoint_cond_eval PARAMS ((char *)); | |
123 | ||
124 | static void | |
125 | cleanup_executing_breakpoints PARAMS ((int)); | |
126 | ||
127 | static void | |
128 | commands_command PARAMS ((char *, int)); | |
129 | ||
130 | static void | |
131 | condition_command PARAMS ((char *, int)); | |
132 | ||
133 | static int | |
134 | get_number PARAMS ((char **)); | |
135 | ||
136 | static void | |
137 | set_breakpoint_count PARAMS ((int)); | |
138 | ||
139 | ||
bd5635a1 RP |
140 | extern int addressprint; /* Print machine addresses? */ |
141 | extern int demangle; /* Print de-mangled symbol names? */ | |
142 | ||
bd5635a1 RP |
143 | /* Are we executing breakpoint commands? */ |
144 | static int executing_breakpoint_commands; | |
145 | ||
bd5635a1 RP |
146 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) |
147 | ||
148 | /* Chain of all breakpoints defined. */ | |
149 | ||
150 | struct breakpoint *breakpoint_chain; | |
151 | ||
152 | /* Number of last breakpoint made. */ | |
153 | ||
154 | static int breakpoint_count; | |
155 | ||
156 | /* Set breakpoint count to NUM. */ | |
157 | static void | |
158 | set_breakpoint_count (num) | |
159 | int num; | |
160 | { | |
161 | breakpoint_count = num; | |
162 | set_internalvar (lookup_internalvar ("bpnum"), | |
06b6c733 | 163 | value_from_longest (builtin_type_int, (LONGEST) num)); |
bd5635a1 RP |
164 | } |
165 | ||
166 | /* Default address, symtab and line to put a breakpoint at | |
167 | for "break" command with no arg. | |
168 | if default_breakpoint_valid is zero, the other three are | |
169 | not valid, and "break" with no arg is an error. | |
170 | ||
171 | This set by print_stack_frame, which calls set_default_breakpoint. */ | |
172 | ||
173 | int default_breakpoint_valid; | |
174 | CORE_ADDR default_breakpoint_address; | |
175 | struct symtab *default_breakpoint_symtab; | |
176 | int default_breakpoint_line; | |
177 | ||
bd5635a1 RP |
178 | /* Flag indicating extra verbosity for xgdb. */ |
179 | extern int xgdb_verbose; | |
180 | \f | |
181 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. | |
182 | Advance *PP after the string and any trailing whitespace. | |
183 | ||
184 | Currently the string can either be a number or "$" followed by the name | |
185 | of a convenience variable. Making it an expression wouldn't work well | |
186 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ | |
187 | static int | |
188 | get_number (pp) | |
189 | char **pp; | |
190 | { | |
191 | int retval; | |
192 | char *p = *pp; | |
193 | ||
194 | if (p == NULL) | |
195 | /* Empty line means refer to the last breakpoint. */ | |
196 | return breakpoint_count; | |
197 | else if (*p == '$') | |
198 | { | |
199 | /* Make a copy of the name, so we can null-terminate it | |
200 | to pass to lookup_internalvar(). */ | |
201 | char *varname; | |
202 | char *start = ++p; | |
203 | value val; | |
204 | ||
205 | while (isalnum (*p) || *p == '_') | |
206 | p++; | |
207 | varname = (char *) alloca (p - start + 1); | |
208 | strncpy (varname, start, p - start); | |
209 | varname[p - start] = '\0'; | |
210 | val = value_of_internalvar (lookup_internalvar (varname)); | |
211 | if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT) | |
212 | error ( | |
213 | "Convenience variables used to specify breakpoints must have integer values." | |
214 | ); | |
215 | retval = (int) value_as_long (val); | |
216 | } | |
217 | else | |
218 | { | |
219 | while (*p >= '0' && *p <= '9') | |
220 | ++p; | |
221 | if (p == *pp) | |
222 | /* There is no number here. (e.g. "cond a == b"). */ | |
223 | error_no_arg ("breakpoint number"); | |
224 | retval = atoi (*pp); | |
225 | } | |
226 | if (!(isspace (*p) || *p == '\0')) | |
227 | error ("breakpoint number expected"); | |
228 | while (isspace (*p)) | |
229 | p++; | |
230 | *pp = p; | |
231 | return retval; | |
232 | } | |
233 | \f | |
234 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ | |
235 | ||
236 | static void | |
237 | condition_command (arg, from_tty) | |
238 | char *arg; | |
239 | int from_tty; | |
240 | { | |
241 | register struct breakpoint *b; | |
242 | char *p; | |
243 | register int bnum; | |
244 | ||
245 | if (arg == 0) | |
246 | error_no_arg ("breakpoint number"); | |
247 | ||
248 | p = arg; | |
249 | bnum = get_number (&p); | |
250 | ||
251 | ALL_BREAKPOINTS (b) | |
252 | if (b->number == bnum) | |
253 | { | |
254 | if (b->cond) | |
255 | { | |
256 | free (b->cond); | |
257 | b->cond = 0; | |
258 | } | |
259 | if (b->cond_string != NULL) | |
260 | free (b->cond_string); | |
261 | ||
262 | if (*p == 0) | |
263 | { | |
264 | b->cond = 0; | |
265 | b->cond_string = NULL; | |
266 | if (from_tty) | |
267 | printf ("Breakpoint %d now unconditional.\n", bnum); | |
268 | } | |
269 | else | |
270 | { | |
271 | arg = p; | |
272 | /* I don't know if it matters whether this is the string the user | |
273 | typed in or the decompiled expression. */ | |
274 | b->cond_string = savestring (arg, strlen (arg)); | |
d3b9c0df | 275 | b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); |
bd5635a1 RP |
276 | if (*arg) |
277 | error ("Junk at end of expression"); | |
278 | } | |
279 | return; | |
280 | } | |
281 | ||
282 | error ("No breakpoint number %d.", bnum); | |
283 | } | |
284 | ||
bdbd5f50 | 285 | /* ARGSUSED */ |
bd5635a1 RP |
286 | static void |
287 | commands_command (arg, from_tty) | |
288 | char *arg; | |
289 | int from_tty; | |
290 | { | |
291 | register struct breakpoint *b; | |
292 | char *p; | |
293 | register int bnum; | |
294 | struct command_line *l; | |
295 | ||
296 | /* If we allowed this, we would have problems with when to | |
297 | free the storage, if we change the commands currently | |
298 | being read from. */ | |
299 | ||
300 | if (executing_breakpoint_commands) | |
301 | error ("Can't use the \"commands\" command among a breakpoint's commands."); | |
302 | ||
303 | p = arg; | |
304 | bnum = get_number (&p); | |
305 | if (p && *p) | |
306 | error ("Unexpected extra arguments following breakpoint number."); | |
307 | ||
308 | ALL_BREAKPOINTS (b) | |
309 | if (b->number == bnum) | |
310 | { | |
bdbd5f50 | 311 | if (from_tty && input_from_terminal_p ()) |
bd5635a1 RP |
312 | { |
313 | printf ("Type commands for when breakpoint %d is hit, one per line.\n\ | |
314 | End with a line saying just \"end\".\n", bnum); | |
315 | fflush (stdout); | |
316 | } | |
317 | l = read_command_lines (); | |
318 | free_command_lines (&b->commands); | |
319 | b->commands = l; | |
320 | return; | |
321 | } | |
322 | error ("No breakpoint number %d.", bnum); | |
323 | } | |
324 | \f | |
31ef19fc JK |
325 | extern int memory_breakpoint_size; /* from mem-break.c */ |
326 | ||
327 | /* Like target_read_memory() but if breakpoints are inserted, return | |
30875e1c SG |
328 | the shadow contents instead of the breakpoints themselves. |
329 | ||
330 | Read "memory data" from whatever target or inferior we have. | |
331 | Returns zero if successful, errno value if not. EIO is used | |
332 | for address out of bounds. If breakpoints are inserted, returns | |
333 | shadow contents, not the breakpoints themselves. From breakpoint.c. */ | |
334 | ||
31ef19fc JK |
335 | int |
336 | read_memory_nobpt (memaddr, myaddr, len) | |
337 | CORE_ADDR memaddr; | |
338 | char *myaddr; | |
339 | unsigned len; | |
340 | { | |
341 | int status; | |
342 | struct breakpoint *b; | |
343 | ||
344 | if (memory_breakpoint_size < 0) | |
345 | /* No breakpoints on this machine. */ | |
346 | return target_read_memory (memaddr, myaddr, len); | |
347 | ||
348 | ALL_BREAKPOINTS (b) | |
349 | { | |
30875e1c | 350 | if (b->type == bp_watchpoint || !b->inserted) |
31ef19fc JK |
351 | continue; |
352 | else if (b->address + memory_breakpoint_size <= memaddr) | |
353 | /* The breakpoint is entirely before the chunk of memory | |
354 | we are reading. */ | |
355 | continue; | |
356 | else if (b->address >= memaddr + len) | |
357 | /* The breakpoint is entirely after the chunk of memory we | |
358 | are reading. */ | |
359 | continue; | |
360 | else | |
361 | { | |
362 | /* Copy the breakpoint from the shadow contents, and recurse | |
363 | for the things before and after. */ | |
364 | ||
365 | /* Addresses and length of the part of the breakpoint that | |
366 | we need to copy. */ | |
367 | CORE_ADDR membpt = b->address; | |
368 | unsigned int bptlen = memory_breakpoint_size; | |
369 | /* Offset within shadow_contents. */ | |
370 | int bptoffset = 0; | |
371 | ||
372 | if (membpt < memaddr) | |
373 | { | |
374 | /* Only copy the second part of the breakpoint. */ | |
375 | bptlen -= memaddr - membpt; | |
376 | bptoffset = memaddr - membpt; | |
377 | membpt = memaddr; | |
378 | } | |
379 | ||
380 | if (membpt + bptlen > memaddr + len) | |
381 | { | |
382 | /* Only copy the first part of the breakpoint. */ | |
383 | bptlen -= (membpt + bptlen) - (memaddr + len); | |
384 | } | |
385 | ||
386 | bcopy (b->shadow_contents + bptoffset, | |
387 | myaddr + membpt - memaddr, bptlen); | |
388 | ||
389 | if (membpt > memaddr) | |
390 | { | |
391 | /* Copy the section of memory before the breakpoint. */ | |
392 | status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr); | |
393 | if (status != 0) | |
394 | return status; | |
395 | } | |
396 | ||
397 | if (membpt + bptlen < memaddr + len) | |
398 | { | |
399 | /* Copy the section of memory after the breakpoint. */ | |
400 | status = read_memory_nobpt | |
401 | (membpt + bptlen, | |
402 | myaddr + membpt + bptlen - memaddr, | |
403 | memaddr + len - (membpt + bptlen)); | |
404 | if (status != 0) | |
405 | return status; | |
406 | } | |
407 | return 0; | |
408 | } | |
409 | } | |
410 | /* Nothing overlaps. Just call read_memory_noerr. */ | |
411 | return target_read_memory (memaddr, myaddr, len); | |
412 | } | |
413 | \f | |
bd5635a1 RP |
414 | /* insert_breakpoints is used when starting or continuing the program. |
415 | remove_breakpoints is used when the program stops. | |
416 | Both return zero if successful, | |
417 | or an `errno' value if could not write the inferior. */ | |
418 | ||
419 | int | |
420 | insert_breakpoints () | |
421 | { | |
422 | register struct breakpoint *b; | |
423 | int val = 0; | |
424 | int disabled_breaks = 0; | |
425 | ||
426 | ALL_BREAKPOINTS (b) | |
30875e1c | 427 | if (b->type != bp_watchpoint |
bd5635a1 RP |
428 | && b->enable != disabled |
429 | && ! b->inserted | |
430 | && ! b->duplicate) | |
431 | { | |
432 | val = target_insert_breakpoint(b->address, b->shadow_contents); | |
433 | if (val) | |
434 | { | |
435 | /* Can't set the breakpoint. */ | |
436 | #if defined (DISABLE_UNSETTABLE_BREAK) | |
437 | if (DISABLE_UNSETTABLE_BREAK (b->address)) | |
438 | { | |
439 | val = 0; | |
440 | b->enable = disabled; | |
441 | if (!disabled_breaks) | |
442 | { | |
443 | fprintf (stderr, | |
444 | "Cannot insert breakpoint %d:\n", b->number); | |
445 | printf_filtered ("Disabling shared library breakpoints:\n"); | |
446 | } | |
447 | disabled_breaks = 1; | |
448 | printf_filtered ("%d ", b->number); | |
449 | } | |
450 | else | |
451 | #endif | |
452 | { | |
453 | fprintf (stderr, "Cannot insert breakpoint %d:\n", b->number); | |
d3b9c0df JG |
454 | #ifdef ONE_PROCESS_WRITETEXT |
455 | fprintf (stderr, | |
456 | "The same program may be running in another process.\n"); | |
457 | #endif | |
bd5635a1 RP |
458 | memory_error (val, b->address); /* which bombs us out */ |
459 | } | |
460 | } | |
461 | else | |
462 | b->inserted = 1; | |
463 | } | |
464 | if (disabled_breaks) | |
465 | printf_filtered ("\n"); | |
466 | return val; | |
467 | } | |
468 | ||
469 | int | |
470 | remove_breakpoints () | |
471 | { | |
472 | register struct breakpoint *b; | |
473 | int val; | |
474 | ||
475 | #ifdef BREAKPOINT_DEBUG | |
476 | printf ("Removing breakpoints.\n"); | |
477 | #endif /* BREAKPOINT_DEBUG */ | |
478 | ||
479 | ALL_BREAKPOINTS (b) | |
30875e1c | 480 | if (b->type != bp_watchpoint && b->inserted) |
bd5635a1 RP |
481 | { |
482 | val = target_remove_breakpoint(b->address, b->shadow_contents); | |
483 | if (val) | |
484 | return val; | |
485 | b->inserted = 0; | |
486 | #ifdef BREAKPOINT_DEBUG | |
d3b9c0df JG |
487 | printf ("Removed breakpoint at %s", |
488 | local_hex_string(b->address)); | |
489 | printf (", shadow %s", | |
490 | local_hex_string(b->shadow_contents[0])); | |
491 | printf (", %s.\n", | |
492 | local_hex_string(b->shadow_contents[1])); | |
bd5635a1 RP |
493 | #endif /* BREAKPOINT_DEBUG */ |
494 | } | |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
499 | /* Clear the "inserted" flag in all breakpoints. | |
500 | This is done when the inferior is loaded. */ | |
501 | ||
502 | void | |
503 | mark_breakpoints_out () | |
504 | { | |
505 | register struct breakpoint *b; | |
506 | ||
507 | ALL_BREAKPOINTS (b) | |
508 | b->inserted = 0; | |
509 | } | |
510 | ||
511 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. | |
512 | When continuing from a location with a breakpoint, | |
513 | we actually single step once before calling insert_breakpoints. */ | |
514 | ||
515 | int | |
516 | breakpoint_here_p (pc) | |
517 | CORE_ADDR pc; | |
518 | { | |
519 | register struct breakpoint *b; | |
520 | ||
521 | ALL_BREAKPOINTS (b) | |
522 | if (b->enable != disabled && b->address == pc) | |
523 | return 1; | |
524 | ||
525 | return 0; | |
526 | } | |
527 | \f | |
528 | /* bpstat stuff. External routines' interfaces are documented | |
529 | in breakpoint.h. */ | |
30875e1c SG |
530 | |
531 | /* Clear a bpstat so that it says we are not at any breakpoint. | |
532 | Also free any storage that is part of a bpstat. */ | |
533 | ||
bd5635a1 RP |
534 | void |
535 | bpstat_clear (bsp) | |
536 | bpstat *bsp; | |
537 | { | |
538 | bpstat p; | |
539 | bpstat q; | |
540 | ||
541 | if (bsp == 0) | |
542 | return; | |
543 | p = *bsp; | |
544 | while (p != NULL) | |
545 | { | |
546 | q = p->next; | |
547 | if (p->old_val != NULL) | |
548 | value_free (p->old_val); | |
549 | free (p); | |
550 | p = q; | |
551 | } | |
552 | *bsp = NULL; | |
553 | } | |
554 | ||
30875e1c SG |
555 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
556 | is part of the bpstat is copied as well. */ | |
557 | ||
bd5635a1 RP |
558 | bpstat |
559 | bpstat_copy (bs) | |
560 | bpstat bs; | |
561 | { | |
562 | bpstat p = NULL; | |
563 | bpstat tmp; | |
564 | bpstat retval; | |
565 | ||
566 | if (bs == NULL) | |
567 | return bs; | |
568 | ||
569 | for (; bs != NULL; bs = bs->next) | |
570 | { | |
571 | tmp = (bpstat) xmalloc (sizeof (*tmp)); | |
572 | bcopy (bs, tmp, sizeof (*tmp)); | |
573 | if (p == NULL) | |
574 | /* This is the first thing in the chain. */ | |
575 | retval = tmp; | |
576 | else | |
577 | p->next = tmp; | |
578 | p = tmp; | |
579 | } | |
580 | p->next = NULL; | |
581 | return retval; | |
582 | } | |
583 | ||
30875e1c SG |
584 | /* Find the bpstat associated with this breakpoint */ |
585 | ||
586 | bpstat | |
587 | bpstat_find_breakpoint(bsp, breakpoint) | |
588 | bpstat bsp; | |
589 | struct breakpoint *breakpoint; | |
590 | { | |
591 | if (bsp == NULL) return NULL; | |
592 | ||
593 | for (;bsp != NULL; bsp = bsp->next) { | |
594 | if (bsp->breakpoint_at == breakpoint) return bsp; | |
595 | } | |
596 | return NULL; | |
597 | } | |
598 | ||
599 | /* Return the breakpoint number of the first breakpoint we are stopped | |
600 | at. *BSP upon return is a bpstat which points to the remaining | |
601 | breakpoints stopped at (but which is not guaranteed to be good for | |
602 | anything but further calls to bpstat_num). | |
603 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ | |
604 | ||
bd5635a1 RP |
605 | int |
606 | bpstat_num (bsp) | |
607 | bpstat *bsp; | |
608 | { | |
609 | struct breakpoint *b; | |
610 | ||
611 | if ((*bsp) == NULL) | |
612 | return 0; /* No more breakpoint values */ | |
613 | else | |
614 | { | |
615 | b = (*bsp)->breakpoint_at; | |
616 | *bsp = (*bsp)->next; | |
617 | if (b == NULL) | |
618 | return -1; /* breakpoint that's been deleted since */ | |
619 | else | |
620 | return b->number; /* We have its number */ | |
621 | } | |
622 | } | |
623 | ||
30875e1c SG |
624 | /* Modify BS so that the actions will not be performed. */ |
625 | ||
bd5635a1 RP |
626 | void |
627 | bpstat_clear_actions (bs) | |
628 | bpstat bs; | |
629 | { | |
630 | for (; bs != NULL; bs = bs->next) | |
631 | { | |
632 | bs->commands = NULL; | |
633 | if (bs->old_val != NULL) | |
634 | { | |
635 | value_free (bs->old_val); | |
636 | bs->old_val = NULL; | |
637 | } | |
638 | } | |
639 | } | |
640 | ||
bdbd5f50 JG |
641 | /* Stub for cleaning up our state if we error-out of a breakpoint command */ |
642 | /* ARGSUSED */ | |
643 | static void | |
644 | cleanup_executing_breakpoints (ignore) | |
645 | int ignore; | |
646 | { | |
647 | executing_breakpoint_commands = 0; | |
648 | } | |
649 | ||
bd5635a1 RP |
650 | /* Execute all the commands associated with all the breakpoints at this |
651 | location. Any of these commands could cause the process to proceed | |
652 | beyond this point, etc. We look out for such changes by checking | |
653 | the global "breakpoint_proceeded" after each command. */ | |
30875e1c | 654 | |
bd5635a1 RP |
655 | void |
656 | bpstat_do_actions (bsp) | |
657 | bpstat *bsp; | |
658 | { | |
659 | bpstat bs; | |
bdbd5f50 JG |
660 | struct cleanup *old_chain; |
661 | ||
662 | executing_breakpoint_commands = 1; | |
663 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); | |
bd5635a1 RP |
664 | |
665 | top: | |
666 | bs = *bsp; | |
667 | ||
bd5635a1 RP |
668 | breakpoint_proceeded = 0; |
669 | for (; bs != NULL; bs = bs->next) | |
670 | { | |
671 | while (bs->commands) | |
672 | { | |
673 | char *line = bs->commands->line; | |
674 | bs->commands = bs->commands->next; | |
675 | execute_command (line, 0); | |
676 | /* If the inferior is proceeded by the command, bomb out now. | |
677 | The bpstat chain has been blown away by wait_for_inferior. | |
678 | But since execution has stopped again, there is a new bpstat | |
679 | to look at, so start over. */ | |
680 | if (breakpoint_proceeded) | |
681 | goto top; | |
682 | } | |
683 | } | |
bd5635a1 RP |
684 | |
685 | executing_breakpoint_commands = 0; | |
bdbd5f50 | 686 | discard_cleanups (old_chain); |
bd5635a1 RP |
687 | } |
688 | ||
30875e1c SG |
689 | /* Print a message indicating what happened. Returns nonzero to |
690 | say that only the source line should be printed after this (zero | |
691 | return means print the frame as well as the source line). */ | |
692 | ||
bd5635a1 RP |
693 | int |
694 | bpstat_print (bs) | |
695 | bpstat bs; | |
696 | { | |
697 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint | |
698 | which has since been deleted. */ | |
30875e1c SG |
699 | if (bs == NULL |
700 | || bs->breakpoint_at == NULL | |
701 | || (bs->breakpoint_at->type != bp_breakpoint | |
702 | && bs->breakpoint_at->type != bp_watchpoint)) | |
bd5635a1 RP |
703 | return 0; |
704 | ||
705 | /* If bpstat_stop_status says don't print, OK, we won't. An example | |
706 | circumstance is when we single-stepped for both a watchpoint and | |
707 | for a "stepi" instruction. The bpstat says that the watchpoint | |
708 | explains the stop, but we shouldn't print because the watchpoint's | |
709 | value didn't change -- and the real reason we are stopping here | |
710 | rather than continuing to step (as the watchpoint would've had us do) | |
711 | is because of the "stepi". */ | |
712 | if (!bs->print) | |
713 | return 0; | |
714 | ||
30875e1c | 715 | if (bs->breakpoint_at->type == bp_breakpoint) |
bd5635a1 RP |
716 | { |
717 | /* I think the user probably only wants to see one breakpoint | |
718 | number, not all of them. */ | |
719 | printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); | |
720 | return 0; | |
721 | } | |
722 | ||
723 | if (bs->old_val != NULL) | |
724 | { | |
725 | printf_filtered ("\nWatchpoint %d, ", bs->breakpoint_at->number); | |
726 | print_expression (bs->breakpoint_at->exp, stdout); | |
727 | printf_filtered ("\nOld value = "); | |
728 | value_print (bs->old_val, stdout, 0, Val_pretty_default); | |
729 | printf_filtered ("\nNew value = "); | |
730 | value_print (bs->breakpoint_at->val, stdout, 0, | |
731 | Val_pretty_default); | |
732 | printf_filtered ("\n"); | |
733 | value_free (bs->old_val); | |
734 | bs->old_val = NULL; | |
735 | return 1; | |
736 | } | |
737 | ||
fcb887ff JK |
738 | /* Maybe another breakpoint in the chain caused us to stop. |
739 | (Currently all watchpoints go on the bpstat whether hit or | |
740 | not. That probably could (should) be changed, provided care is taken | |
741 | with respect to bpstat_explains_signal). */ | |
742 | if (bs->next) | |
743 | return bpstat_print (bs->next); | |
744 | ||
bd5635a1 RP |
745 | fprintf_filtered (stderr, "gdb internal error: in bpstat_print\n"); |
746 | return 0; | |
747 | } | |
748 | ||
749 | /* Evaluate the expression EXP and return 1 if value is zero. | |
750 | This is used inside a catch_errors to evaluate the breakpoint condition. | |
bdbd5f50 | 751 | The argument is a "struct expression *" that has been cast to char * to |
bd5635a1 RP |
752 | make it pass through catch_errors. */ |
753 | ||
754 | static int | |
755 | breakpoint_cond_eval (exp) | |
bdbd5f50 | 756 | char *exp; |
bd5635a1 | 757 | { |
d3b9c0df | 758 | return !value_true (evaluate_expression ((struct expression *)exp)); |
bd5635a1 RP |
759 | } |
760 | ||
761 | /* Allocate a new bpstat and chain it to the current one. */ | |
762 | ||
763 | static bpstat | |
764 | bpstat_alloc (b, cbs) | |
765 | register struct breakpoint *b; | |
766 | bpstat cbs; /* Current "bs" value */ | |
767 | { | |
768 | bpstat bs; | |
769 | ||
770 | bs = (bpstat) xmalloc (sizeof (*bs)); | |
771 | cbs->next = bs; | |
772 | bs->breakpoint_at = b; | |
773 | /* If the condition is false, etc., don't do the commands. */ | |
774 | bs->commands = NULL; | |
30875e1c | 775 | bs->momentary = b->disposition == delete; |
bd5635a1 RP |
776 | bs->old_val = NULL; |
777 | return bs; | |
778 | } | |
779 | ||
780 | /* Determine whether we stopped at a breakpoint, etc, or whether we | |
781 | don't understand this stop. Result is a chain of bpstat's such that: | |
782 | ||
783 | if we don't understand the stop, the result is a null pointer. | |
784 | ||
785 | if we understand why we stopped, the result is not null, and | |
786 | the first element of the chain contains summary "stop" and | |
787 | "print" flags for the whole chain. | |
788 | ||
789 | Each element of the chain refers to a particular breakpoint or | |
790 | watchpoint at which we have stopped. (We may have stopped for | |
791 | several reasons.) | |
792 | ||
793 | Each element of the chain has valid next, breakpoint_at, | |
794 | commands, FIXME??? fields. | |
795 | ||
796 | */ | |
797 | ||
798 | ||
799 | bpstat | |
800 | bpstat_stop_status (pc, frame_address) | |
801 | CORE_ADDR *pc; | |
802 | FRAME_ADDR frame_address; | |
803 | { | |
804 | register struct breakpoint *b; | |
805 | int stop = 0; | |
806 | int print = 0; | |
807 | CORE_ADDR bp_addr; | |
bdbd5f50 | 808 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
809 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ |
810 | int real_breakpoint = 0; | |
bdbd5f50 | 811 | #endif |
bd5635a1 RP |
812 | /* Root of the chain of bpstat's */ |
813 | struct bpstat__struct root_bs[1]; | |
814 | /* Pointer to the last thing in the chain currently. */ | |
815 | bpstat bs = root_bs; | |
816 | ||
817 | /* Get the address where the breakpoint would have been. */ | |
818 | bp_addr = *pc - DECR_PC_AFTER_BREAK; | |
819 | ||
820 | ALL_BREAKPOINTS (b) | |
821 | { | |
822 | int this_bp_stop; | |
823 | int this_bp_print; | |
824 | ||
825 | if (b->enable == disabled) | |
826 | continue; | |
30875e1c SG |
827 | |
828 | if (b->type != bp_watchpoint && b->address != bp_addr) | |
bd5635a1 RP |
829 | continue; |
830 | ||
30875e1c SG |
831 | /* Come here if it's a watchpoint, or if the break address matches */ |
832 | ||
bd5635a1 RP |
833 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ |
834 | ||
835 | this_bp_stop = 1; | |
836 | this_bp_print = 1; | |
837 | ||
30875e1c | 838 | if (b->type == bp_watchpoint) |
bd5635a1 RP |
839 | { |
840 | int within_current_scope; | |
841 | if (b->exp_valid_block != NULL) | |
842 | within_current_scope = | |
843 | contained_in (get_selected_block (), b->exp_valid_block); | |
844 | else | |
845 | within_current_scope = 1; | |
846 | ||
847 | if (within_current_scope) | |
848 | { | |
fcb887ff JK |
849 | /* We use value_{,free_to_}mark because it could be a |
850 | *long* time before we return to the command level and | |
851 | call free_all_values. */ | |
852 | ||
853 | value mark = value_mark (); | |
bd5635a1 | 854 | value new_val = evaluate_expression (b->exp); |
bd5635a1 RP |
855 | if (!value_equal (b->val, new_val)) |
856 | { | |
fcb887ff JK |
857 | release_value (new_val); |
858 | value_free_to_mark (mark); | |
bd5635a1 RP |
859 | bs->old_val = b->val; |
860 | b->val = new_val; | |
861 | /* We will stop here */ | |
862 | } | |
863 | else | |
864 | { | |
865 | /* Nothing changed, don't do anything. */ | |
fcb887ff | 866 | value_free_to_mark (mark); |
bd5635a1 RP |
867 | continue; |
868 | /* We won't stop here */ | |
869 | } | |
870 | } | |
871 | else | |
872 | { | |
873 | /* This seems like the only logical thing to do because | |
874 | if we temporarily ignored the watchpoint, then when | |
875 | we reenter the block in which it is valid it contains | |
876 | garbage (in the case of a function, it may have two | |
877 | garbage values, one before and one after the prologue). | |
878 | So we can't even detect the first assignment to it and | |
879 | watch after that (since the garbage may or may not equal | |
880 | the first value assigned). */ | |
881 | b->enable = disabled; | |
882 | printf_filtered ("\ | |
883 | Watchpoint %d disabled because the program has left the block in\n\ | |
884 | which its expression is valid.\n", b->number); | |
885 | /* We won't stop here */ | |
886 | /* FIXME, maybe we should stop here!!! */ | |
887 | continue; | |
888 | } | |
889 | } | |
bdbd5f50 | 890 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
891 | else |
892 | real_breakpoint = 1; | |
bdbd5f50 | 893 | #endif |
bd5635a1 RP |
894 | |
895 | if (b->frame && b->frame != frame_address) | |
896 | this_bp_stop = 0; | |
897 | else | |
898 | { | |
bdbd5f50 | 899 | int value_is_zero; |
bd5635a1 RP |
900 | |
901 | if (b->cond) | |
902 | { | |
903 | /* Need to select the frame, with all that implies | |
904 | so that the conditions will have the right context. */ | |
905 | select_frame (get_current_frame (), 0); | |
bdbd5f50 JG |
906 | value_is_zero |
907 | = catch_errors (breakpoint_cond_eval, (char *)(b->cond), | |
06b6c733 JG |
908 | "Error in testing breakpoint condition:\n"); |
909 | /* FIXME-someday, should give breakpoint # */ | |
bd5635a1 RP |
910 | free_all_values (); |
911 | } | |
bdbd5f50 | 912 | if (b->cond && value_is_zero) |
bd5635a1 RP |
913 | { |
914 | this_bp_stop = 0; | |
915 | } | |
916 | else if (b->ignore_count > 0) | |
917 | { | |
918 | b->ignore_count--; | |
919 | this_bp_stop = 0; | |
920 | } | |
921 | else | |
922 | { | |
923 | /* We will stop here */ | |
30875e1c | 924 | if (b->disposition == disable) |
bd5635a1 RP |
925 | b->enable = disabled; |
926 | bs->commands = b->commands; | |
927 | if (b->silent) | |
928 | this_bp_print = 0; | |
929 | if (bs->commands && !strcmp ("silent", bs->commands->line)) | |
930 | { | |
931 | bs->commands = bs->commands->next; | |
932 | this_bp_print = 0; | |
933 | } | |
934 | } | |
935 | } | |
936 | if (this_bp_stop) | |
937 | stop = 1; | |
938 | if (this_bp_print) | |
939 | print = 1; | |
940 | } | |
941 | ||
942 | bs->next = NULL; /* Terminate the chain */ | |
943 | bs = root_bs->next; /* Re-grab the head of the chain */ | |
944 | if (bs) | |
945 | { | |
946 | bs->stop = stop; | |
947 | bs->print = print; | |
948 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) | |
949 | if (real_breakpoint) | |
950 | { | |
951 | *pc = bp_addr; | |
952 | #if defined (SHIFT_INST_REGS) | |
953 | { | |
954 | CORE_ADDR pc = read_register (PC_REGNUM); | |
955 | CORE_ADDR npc = read_register (NPC_REGNUM); | |
956 | if (pc != npc) | |
957 | { | |
958 | write_register (NNPC_REGNUM, npc); | |
959 | write_register (NPC_REGNUM, pc); | |
960 | } | |
961 | } | |
962 | #else /* No SHIFT_INST_REGS. */ | |
963 | write_pc (bp_addr); | |
964 | #endif /* No SHIFT_INST_REGS. */ | |
965 | } | |
966 | #endif /* DECR_PC_AFTER_BREAK != 0. */ | |
967 | } | |
968 | return bs; | |
969 | } | |
970 | ||
30875e1c SG |
971 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
972 | without hardware support). This isn't related to a specific bpstat, | |
973 | just to things like whether watchpoints are set. */ | |
974 | ||
bd5635a1 RP |
975 | int |
976 | bpstat_should_step () | |
977 | { | |
978 | struct breakpoint *b; | |
979 | ALL_BREAKPOINTS (b) | |
30875e1c | 980 | if (b->enable == enabled && b->type == bp_watchpoint) |
bd5635a1 RP |
981 | return 1; |
982 | return 0; | |
983 | } | |
984 | \f | |
985 | /* Print information on breakpoint number BNUM, or -1 if all. | |
986 | If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS | |
987 | is nonzero, process only watchpoints. */ | |
988 | ||
989 | static void | |
30875e1c | 990 | breakpoint_1 (bnum, type) |
bd5635a1 | 991 | int bnum; |
30875e1c | 992 | enum bptype type; |
bd5635a1 RP |
993 | { |
994 | register struct breakpoint *b; | |
995 | register struct command_line *l; | |
996 | register struct symbol *sym; | |
997 | CORE_ADDR last_addr = (CORE_ADDR)-1; | |
30875e1c SG |
998 | int found_a_breakpoint = 0; |
999 | static char *bptypes[] = {"breakpoint", "until", "finish", "watchpoint", | |
1000 | "longjmp", "longjmp resume"}; | |
1001 | static char *bpdisps[] = {"del", "dis", ""}; | |
1002 | static char bpenables[] = "ny"; | |
1003 | ||
1004 | if (!breakpoint_chain) | |
1005 | { | |
1006 | printf_filtered ("No breakpoints or watchpoints.\n"); | |
1007 | return; | |
1008 | } | |
bd5635a1 RP |
1009 | |
1010 | ALL_BREAKPOINTS (b) | |
30875e1c SG |
1011 | if (bnum == -1 |
1012 | || bnum == b->number) | |
bd5635a1 | 1013 | { |
30875e1c SG |
1014 | if (!found_a_breakpoint++) |
1015 | printf_filtered ("Num Type Disp Enb %sWhat\n", | |
1016 | addressprint ? "Address " : ""); | |
1017 | ||
1018 | printf_filtered ("%-3d %-10s %-4s %-3c ", | |
1019 | b->number, | |
1020 | bptypes[b->type], | |
1021 | bpdisps[b->disposition], | |
1022 | bpenables[b->enable]); | |
1023 | switch (b->type) | |
bd5635a1 | 1024 | { |
30875e1c SG |
1025 | case bp_watchpoint: |
1026 | print_expression (b->exp, stdout); | |
1027 | break; | |
1028 | case bp_breakpoint: | |
bd5635a1 | 1029 | if (addressprint) |
30875e1c | 1030 | printf_filtered ("%s ", local_hex_string_custom(b->address, "08")); |
bd5635a1 RP |
1031 | |
1032 | last_addr = b->address; | |
1033 | if (b->symtab) | |
1034 | { | |
1035 | sym = find_pc_function (b->address); | |
1036 | if (sym) | |
1037 | { | |
30875e1c | 1038 | fputs_filtered ("in ", stdout); |
bd5635a1 RP |
1039 | fputs_demangled (SYMBOL_NAME (sym), stdout, 1); |
1040 | fputs_filtered (" at ", stdout); | |
1041 | } | |
1042 | fputs_filtered (b->symtab->filename, stdout); | |
1043 | printf_filtered (":%d", b->line_number); | |
1044 | } | |
1045 | else | |
bdbd5f50 | 1046 | print_address_symbolic (b->address, stdout, demangle, " "); |
bd5635a1 RP |
1047 | } |
1048 | ||
1049 | printf_filtered ("\n"); | |
1050 | ||
1051 | if (b->frame) | |
d3b9c0df JG |
1052 | printf_filtered ("\tstop only in stack frame at %s\n", |
1053 | local_hex_string(b->frame)); | |
bd5635a1 RP |
1054 | if (b->cond) |
1055 | { | |
1056 | printf_filtered ("\tstop only if "); | |
1057 | print_expression (b->cond, stdout); | |
1058 | printf_filtered ("\n"); | |
1059 | } | |
1060 | if (b->ignore_count) | |
1061 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); | |
1062 | if ((l = b->commands)) | |
1063 | while (l) | |
1064 | { | |
1065 | fputs_filtered ("\t", stdout); | |
1066 | fputs_filtered (l->line, stdout); | |
1067 | fputs_filtered ("\n", stdout); | |
1068 | l = l->next; | |
1069 | } | |
1070 | } | |
1071 | ||
30875e1c SG |
1072 | if (!found_a_breakpoint |
1073 | && bnum != -1) | |
1074 | printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum); | |
1075 | else | |
1076 | /* Compare against (CORE_ADDR)-1 in case some compiler decides | |
1077 | that a comparison of an unsigned with -1 is always false. */ | |
1078 | if (last_addr != (CORE_ADDR)-1) | |
1079 | set_next_address (last_addr); | |
bd5635a1 RP |
1080 | } |
1081 | ||
bdbd5f50 | 1082 | /* ARGSUSED */ |
bd5635a1 RP |
1083 | static void |
1084 | breakpoints_info (bnum_exp, from_tty) | |
1085 | char *bnum_exp; | |
1086 | int from_tty; | |
1087 | { | |
1088 | int bnum = -1; | |
1089 | ||
1090 | if (bnum_exp) | |
1091 | bnum = parse_and_eval_address (bnum_exp); | |
1092 | ||
30875e1c | 1093 | breakpoint_1 (bnum, bp_breakpoint); |
bd5635a1 RP |
1094 | } |
1095 | ||
bdbd5f50 | 1096 | /* ARGSUSED */ |
bd5635a1 RP |
1097 | static void |
1098 | watchpoints_info (bnum_exp, from_tty) | |
1099 | char *bnum_exp; | |
1100 | int from_tty; | |
1101 | { | |
1102 | int bnum = -1; | |
1103 | ||
1104 | if (bnum_exp) | |
1105 | bnum = parse_and_eval_address (bnum_exp); | |
1106 | ||
30875e1c | 1107 | breakpoint_1 (bnum, bp_watchpoint); |
bd5635a1 RP |
1108 | } |
1109 | ||
1110 | /* Print a message describing any breakpoints set at PC. */ | |
1111 | ||
1112 | static void | |
1113 | describe_other_breakpoints (pc) | |
1114 | register CORE_ADDR pc; | |
1115 | { | |
1116 | register int others = 0; | |
1117 | register struct breakpoint *b; | |
1118 | ||
1119 | ALL_BREAKPOINTS (b) | |
1120 | if (b->address == pc) | |
1121 | others++; | |
1122 | if (others > 0) | |
1123 | { | |
1124 | printf ("Note: breakpoint%s ", (others > 1) ? "s" : ""); | |
1125 | ALL_BREAKPOINTS (b) | |
1126 | if (b->address == pc) | |
1127 | { | |
1128 | others--; | |
1129 | printf ("%d%s%s ", | |
1130 | b->number, | |
1131 | (b->enable == disabled) ? " (disabled)" : "", | |
1132 | (others > 1) ? "," : ((others == 1) ? " and" : "")); | |
1133 | } | |
d3b9c0df | 1134 | printf ("also set at pc %s.\n", local_hex_string(pc)); |
bd5635a1 RP |
1135 | } |
1136 | } | |
1137 | \f | |
1138 | /* Set the default place to put a breakpoint | |
1139 | for the `break' command with no arguments. */ | |
1140 | ||
1141 | void | |
1142 | set_default_breakpoint (valid, addr, symtab, line) | |
1143 | int valid; | |
1144 | CORE_ADDR addr; | |
1145 | struct symtab *symtab; | |
1146 | int line; | |
1147 | { | |
1148 | default_breakpoint_valid = valid; | |
1149 | default_breakpoint_address = addr; | |
1150 | default_breakpoint_symtab = symtab; | |
1151 | default_breakpoint_line = line; | |
1152 | } | |
1153 | ||
1154 | /* Rescan breakpoints at address ADDRESS, | |
1155 | marking the first one as "first" and any others as "duplicates". | |
1156 | This is so that the bpt instruction is only inserted once. */ | |
1157 | ||
1158 | static void | |
1159 | check_duplicates (address) | |
1160 | CORE_ADDR address; | |
1161 | { | |
1162 | register struct breakpoint *b; | |
1163 | register int count = 0; | |
1164 | ||
30875e1c | 1165 | if (address == 0) /* Watchpoints are uninteresting */ |
f266e564 JK |
1166 | return; |
1167 | ||
bd5635a1 RP |
1168 | ALL_BREAKPOINTS (b) |
1169 | if (b->enable != disabled && b->address == address) | |
1170 | { | |
1171 | count++; | |
1172 | b->duplicate = count > 1; | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | /* Low level routine to set a breakpoint. | |
1177 | Takes as args the three things that every breakpoint must have. | |
1178 | Returns the breakpoint object so caller can set other things. | |
1179 | Does not set the breakpoint number! | |
f266e564 JK |
1180 | Does not print anything. |
1181 | ||
1182 | ==> This routine should not be called if there is a chance of later | |
1183 | error(); otherwise it leaves a bogus breakpoint on the chain. Validate | |
1184 | your arguments BEFORE calling this routine! */ | |
bd5635a1 RP |
1185 | |
1186 | static struct breakpoint * | |
1187 | set_raw_breakpoint (sal) | |
1188 | struct symtab_and_line sal; | |
1189 | { | |
1190 | register struct breakpoint *b, *b1; | |
1191 | ||
1192 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); | |
1193 | bzero (b, sizeof *b); | |
1194 | b->address = sal.pc; | |
1195 | b->symtab = sal.symtab; | |
1196 | b->line_number = sal.line; | |
1197 | b->enable = enabled; | |
1198 | b->next = 0; | |
1199 | b->silent = 0; | |
1200 | b->ignore_count = 0; | |
1201 | b->commands = NULL; | |
30875e1c | 1202 | b->frame = 0; |
bd5635a1 RP |
1203 | |
1204 | /* Add this breakpoint to the end of the chain | |
1205 | so that a list of breakpoints will come out in order | |
1206 | of increasing numbers. */ | |
1207 | ||
1208 | b1 = breakpoint_chain; | |
1209 | if (b1 == 0) | |
1210 | breakpoint_chain = b; | |
1211 | else | |
1212 | { | |
1213 | while (b1->next) | |
1214 | b1 = b1->next; | |
1215 | b1->next = b; | |
1216 | } | |
1217 | ||
1218 | check_duplicates (sal.pc); | |
1219 | ||
1220 | return b; | |
1221 | } | |
1222 | ||
30875e1c SG |
1223 | struct breakpoint *longjmp_breakpoint = NULL; |
1224 | struct breakpoint *_longjmp_breakpoint = NULL; | |
1225 | struct breakpoint *siglongjmp_breakpoint = NULL; | |
1226 | struct breakpoint *longjmp_resume_breakpoint = NULL; | |
1227 | ||
1228 | static void | |
1229 | create_longjmp_breakpoint_1(func_name, bpt) | |
1230 | char *func_name; | |
1231 | struct breakpoint **bpt; | |
1232 | { | |
1233 | int i; | |
1234 | struct symtab_and_line sal; | |
1235 | struct breakpoint *b; | |
1236 | ||
1237 | if (*bpt != NULL) | |
1238 | { | |
1239 | delete_breakpoint(*bpt); | |
1240 | *bpt = NULL; | |
1241 | } | |
1242 | ||
1243 | if (func_name != NULL) | |
1244 | { | |
1245 | struct minimal_symbol *m; | |
1246 | ||
1247 | m = lookup_minimal_symbol(func_name, (struct objfile *)NULL); | |
1248 | if (m) | |
1249 | sal.pc = m->address; | |
1250 | else | |
1251 | return; | |
1252 | } | |
1253 | else | |
1254 | sal.pc = 0; | |
1255 | ||
1256 | sal.symtab = NULL; | |
1257 | sal.line = 0; | |
1258 | if (*bpt != NULL) | |
1259 | b = *bpt; | |
1260 | else | |
1261 | b = set_raw_breakpoint(sal); | |
1262 | ||
1263 | if (!b) return; | |
1264 | ||
1265 | b->type = bp_longjmp; | |
1266 | b->disposition = donttouch; | |
1267 | b->enable = disabled; | |
1268 | b->silent = 1; | |
1269 | *bpt = b; | |
1270 | } | |
1271 | ||
1272 | /* Call this routine each time we read a new executable or symbol table | |
1273 | file. */ | |
1274 | ||
1275 | #ifdef GET_LONGJMP_TARGET | |
1276 | void | |
1277 | create_longjmp_breakpoint() | |
1278 | { | |
1279 | create_longjmp_breakpoint_1("longjmp", &longjmp_breakpoint); | |
1280 | create_longjmp_breakpoint_1("_longjmp", &_longjmp_breakpoint); | |
1281 | create_longjmp_breakpoint_1("siglongjmp", &siglongjmp_breakpoint); | |
1282 | ||
1283 | if ((longjmp_breakpoint || _longjmp_breakpoint || siglongjmp_breakpoint) | |
1284 | && !longjmp_resume_breakpoint) | |
1285 | { | |
1286 | create_longjmp_breakpoint_1(NULL, &longjmp_resume_breakpoint); | |
1287 | if (longjmp_resume_breakpoint) | |
1288 | longjmp_resume_breakpoint->type = bp_longjmp_resume; | |
1289 | } | |
1290 | } | |
1291 | #else | |
1292 | void | |
1293 | create_longjmp_breakpoint() | |
1294 | { | |
1295 | } | |
1296 | #endif | |
1297 | ||
1298 | /* Call this routine when stepping and nexting to enable a breakpoint if we do | |
1299 | a longjmp(). When we hit that breakpoint, call | |
1300 | set_longjmp_resume_breakpoint() to figure out where we are going. */ | |
1301 | ||
1302 | void | |
1303 | enable_longjmp_breakpoint() | |
1304 | { | |
1305 | if (longjmp_breakpoint) | |
1306 | longjmp_breakpoint->enable = enabled; | |
1307 | if (_longjmp_breakpoint) | |
1308 | _longjmp_breakpoint->enable = enabled; | |
1309 | if (siglongjmp_breakpoint) | |
1310 | siglongjmp_breakpoint->enable = enabled; | |
1311 | } | |
1312 | ||
1313 | void | |
1314 | disable_longjmp_breakpoint() | |
1315 | { | |
1316 | if (longjmp_breakpoint) | |
1317 | longjmp_breakpoint->enable = disabled; | |
1318 | if (_longjmp_breakpoint) | |
1319 | _longjmp_breakpoint->enable = disabled; | |
1320 | if (siglongjmp_breakpoint) | |
1321 | siglongjmp_breakpoint->enable = disabled; | |
1322 | if (longjmp_resume_breakpoint) | |
1323 | longjmp_resume_breakpoint->enable = disabled; | |
1324 | } | |
1325 | ||
1326 | /* Call this after hitting the longjmp() breakpoint. Use this to set a new | |
1327 | breakpoint at the target of the jmp_buf. | |
1328 | */ | |
1329 | ||
1330 | void | |
1331 | set_longjmp_resume_breakpoint(pc, frame) | |
1332 | CORE_ADDR pc; | |
1333 | FRAME frame; | |
1334 | { | |
1335 | longjmp_resume_breakpoint->address = pc; | |
1336 | longjmp_resume_breakpoint->enable = enabled; | |
1337 | if (frame != NULL) | |
1338 | longjmp_resume_breakpoint->frame = FRAME_FP(frame); | |
1339 | else | |
1340 | longjmp_resume_breakpoint->frame = 0; | |
1341 | } | |
1342 | ||
bd5635a1 RP |
1343 | /* Set a breakpoint that will evaporate an end of command |
1344 | at address specified by SAL. | |
1345 | Restrict it to frame FRAME if FRAME is nonzero. */ | |
1346 | ||
30875e1c SG |
1347 | struct breakpoint * |
1348 | set_momentary_breakpoint (sal, frame, type) | |
bd5635a1 RP |
1349 | struct symtab_and_line sal; |
1350 | FRAME frame; | |
30875e1c | 1351 | enum bptype type; |
bd5635a1 RP |
1352 | { |
1353 | register struct breakpoint *b; | |
1354 | b = set_raw_breakpoint (sal); | |
30875e1c SG |
1355 | b->type = type; |
1356 | b->enable = enabled; | |
1357 | b->disposition = donttouch; | |
bd5635a1 | 1358 | b->frame = (frame ? FRAME_FP (frame) : 0); |
30875e1c | 1359 | return b; |
bd5635a1 RP |
1360 | } |
1361 | ||
30875e1c | 1362 | #if 0 |
bd5635a1 RP |
1363 | void |
1364 | clear_momentary_breakpoints () | |
1365 | { | |
1366 | register struct breakpoint *b; | |
1367 | ALL_BREAKPOINTS (b) | |
30875e1c | 1368 | if (b->disposition == delete) |
bd5635a1 RP |
1369 | { |
1370 | delete_breakpoint (b); | |
1371 | break; | |
1372 | } | |
1373 | } | |
30875e1c | 1374 | #endif |
bd5635a1 RP |
1375 | \f |
1376 | /* Tell the user we have just set a breakpoint B. */ | |
1377 | static void | |
1378 | mention (b) | |
1379 | struct breakpoint *b; | |
1380 | { | |
30875e1c | 1381 | switch (b->type) |
bd5635a1 | 1382 | { |
30875e1c | 1383 | case bp_watchpoint: |
bd5635a1 RP |
1384 | printf_filtered ("Watchpoint %d: ", b->number); |
1385 | print_expression (b->exp, stdout); | |
30875e1c SG |
1386 | break; |
1387 | case bp_breakpoint: | |
d3b9c0df JG |
1388 | printf_filtered ("Breakpoint %d at %s", b->number, |
1389 | local_hex_string(b->address)); | |
bd5635a1 RP |
1390 | if (b->symtab) |
1391 | printf_filtered (": file %s, line %d.", | |
1392 | b->symtab->filename, b->line_number); | |
1393 | } | |
1394 | printf_filtered ("\n"); | |
1395 | } | |
1396 | ||
1397 | #if 0 | |
1398 | /* Nobody calls this currently. */ | |
1399 | /* Set a breakpoint from a symtab and line. | |
1400 | If TEMPFLAG is nonzero, it is a temporary breakpoint. | |
1401 | ADDR_STRING is a malloc'd string holding the name of where we are | |
1402 | setting the breakpoint. This is used later to re-set it after the | |
1403 | program is relinked and symbols are reloaded. | |
1404 | Print the same confirmation messages that the breakpoint command prints. */ | |
1405 | ||
1406 | void | |
1407 | set_breakpoint (s, line, tempflag, addr_string) | |
1408 | struct symtab *s; | |
1409 | int line; | |
1410 | int tempflag; | |
1411 | char *addr_string; | |
1412 | { | |
1413 | register struct breakpoint *b; | |
1414 | struct symtab_and_line sal; | |
1415 | ||
1416 | sal.symtab = s; | |
1417 | sal.line = line; | |
30875e1c SG |
1418 | sal.pc = 0; |
1419 | resolve_sal_pc (&sal); /* Might error out */ | |
1420 | describe_other_breakpoints (sal.pc); | |
bd5635a1 | 1421 | |
30875e1c SG |
1422 | b = set_raw_breakpoint (sal); |
1423 | set_breakpoint_count (breakpoint_count + 1); | |
1424 | b->number = breakpoint_count; | |
1425 | b->type = bp_breakpoint; | |
1426 | b->cond = 0; | |
1427 | b->addr_string = addr_string; | |
1428 | b->enable = enabled; | |
1429 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 | 1430 | |
30875e1c | 1431 | mention (b); |
bd5635a1 | 1432 | } |
30875e1c | 1433 | #endif /* 0 */ |
bd5635a1 RP |
1434 | \f |
1435 | /* Set a breakpoint according to ARG (function, linenum or *address) | |
1436 | and make it temporary if TEMPFLAG is nonzero. */ | |
1437 | ||
1438 | static void | |
1439 | break_command_1 (arg, tempflag, from_tty) | |
1440 | char *arg; | |
1441 | int tempflag, from_tty; | |
1442 | { | |
1443 | struct symtabs_and_lines sals; | |
1444 | struct symtab_and_line sal; | |
1445 | register struct expression *cond = 0; | |
1446 | register struct breakpoint *b; | |
1447 | ||
1448 | /* Pointers in arg to the start, and one past the end, of the condition. */ | |
1449 | char *cond_start = NULL; | |
1450 | char *cond_end; | |
1451 | /* Pointers in arg to the start, and one past the end, | |
1452 | of the address part. */ | |
1453 | char *addr_start = NULL; | |
1454 | char *addr_end; | |
1455 | ||
1456 | int i; | |
bd5635a1 RP |
1457 | |
1458 | sals.sals = NULL; | |
1459 | sals.nelts = 0; | |
1460 | ||
1461 | sal.line = sal.pc = sal.end = 0; | |
1462 | sal.symtab = 0; | |
1463 | ||
1464 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ | |
1465 | ||
1466 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
1467 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
1468 | { | |
1469 | if (default_breakpoint_valid) | |
1470 | { | |
1471 | sals.sals = (struct symtab_and_line *) | |
1472 | xmalloc (sizeof (struct symtab_and_line)); | |
1473 | sal.pc = default_breakpoint_address; | |
1474 | sal.line = default_breakpoint_line; | |
1475 | sal.symtab = default_breakpoint_symtab; | |
1476 | sals.sals[0] = sal; | |
1477 | sals.nelts = 1; | |
1478 | } | |
1479 | else | |
1480 | error ("No default breakpoint address now."); | |
1481 | } | |
1482 | else | |
1483 | { | |
1484 | addr_start = arg; | |
1485 | ||
1486 | /* Force almost all breakpoints to be in terms of the | |
1487 | current_source_symtab (which is decode_line_1's default). This | |
1488 | should produce the results we want almost all of the time while | |
1489 | leaving default_breakpoint_* alone. */ | |
1490 | if (default_breakpoint_valid | |
1491 | && (!current_source_symtab | |
1492 | || (arg && (*arg == '+' || *arg == '-')))) | |
1493 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
1494 | default_breakpoint_line); | |
1495 | else | |
1496 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0); | |
1497 | ||
1498 | addr_end = arg; | |
1499 | } | |
1500 | ||
1501 | if (! sals.nelts) | |
1502 | return; | |
1503 | ||
30875e1c SG |
1504 | /* Resolve all line numbers to PC's, and verify that conditions |
1505 | can be parsed, before setting any breakpoints. */ | |
bd5635a1 RP |
1506 | for (i = 0; i < sals.nelts; i++) |
1507 | { | |
30875e1c | 1508 | resolve_sal_pc (&sals.sals[i]); |
bd5635a1 RP |
1509 | |
1510 | while (arg && *arg) | |
1511 | { | |
1512 | if (arg[0] == 'i' && arg[1] == 'f' | |
1513 | && (arg[2] == ' ' || arg[2] == '\t')) | |
1514 | { | |
1515 | arg += 2; | |
1516 | cond_start = arg; | |
30875e1c | 1517 | cond = parse_exp_1 (&arg, block_for_pc (sals.sals[i].pc), 0); |
bd5635a1 RP |
1518 | cond_end = arg; |
1519 | } | |
1520 | else | |
1521 | error ("Junk at end of arguments."); | |
1522 | } | |
bd5635a1 RP |
1523 | } |
1524 | ||
30875e1c | 1525 | /* Now set all the breakpoints. */ |
bd5635a1 RP |
1526 | for (i = 0; i < sals.nelts; i++) |
1527 | { | |
1528 | sal = sals.sals[i]; | |
1529 | ||
1530 | if (from_tty) | |
1531 | describe_other_breakpoints (sal.pc); | |
1532 | ||
1533 | b = set_raw_breakpoint (sal); | |
1534 | set_breakpoint_count (breakpoint_count + 1); | |
1535 | b->number = breakpoint_count; | |
30875e1c | 1536 | b->type = bp_breakpoint; |
bd5635a1 RP |
1537 | b->cond = cond; |
1538 | ||
1539 | if (addr_start) | |
1540 | b->addr_string = savestring (addr_start, addr_end - addr_start); | |
1541 | if (cond_start) | |
1542 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |
1543 | ||
30875e1c SG |
1544 | b->enable = enabled; |
1545 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 RP |
1546 | |
1547 | mention (b); | |
1548 | } | |
1549 | ||
1550 | if (sals.nelts > 1) | |
1551 | { | |
1552 | printf ("Multiple breakpoints were set.\n"); | |
1553 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
1554 | } | |
1555 | free (sals.sals); | |
1556 | } | |
1557 | ||
30875e1c SG |
1558 | /* Helper function for break_command_1 and disassemble_command. */ |
1559 | ||
1560 | void | |
1561 | resolve_sal_pc (sal) | |
1562 | struct symtab_and_line *sal; | |
1563 | { | |
1564 | CORE_ADDR pc; | |
1565 | ||
1566 | if (sal->pc == 0 && sal->symtab != 0) | |
1567 | { | |
1568 | pc = find_line_pc (sal->symtab, sal->line); | |
1569 | if (pc == 0) | |
1570 | error ("No line %d in file \"%s\".", | |
1571 | sal->line, sal->symtab->filename); | |
1572 | sal->pc = pc; | |
1573 | } | |
1574 | } | |
1575 | ||
bd5635a1 RP |
1576 | void |
1577 | break_command (arg, from_tty) | |
1578 | char *arg; | |
1579 | int from_tty; | |
1580 | { | |
1581 | break_command_1 (arg, 0, from_tty); | |
1582 | } | |
1583 | ||
1584 | static void | |
1585 | tbreak_command (arg, from_tty) | |
1586 | char *arg; | |
1587 | int from_tty; | |
1588 | { | |
1589 | break_command_1 (arg, 1, from_tty); | |
1590 | } | |
1591 | ||
bdbd5f50 | 1592 | /* ARGSUSED */ |
bd5635a1 RP |
1593 | static void |
1594 | watch_command (arg, from_tty) | |
1595 | char *arg; | |
1596 | int from_tty; | |
1597 | { | |
1598 | struct breakpoint *b; | |
1599 | struct symtab_and_line sal; | |
f266e564 JK |
1600 | struct expression *exp; |
1601 | struct block *exp_valid_block; | |
1602 | struct value *val; | |
bd5635a1 | 1603 | |
30875e1c | 1604 | sal.pc = 0; |
bd5635a1 RP |
1605 | sal.symtab = NULL; |
1606 | sal.line = 0; | |
1607 | ||
f266e564 JK |
1608 | /* Parse arguments. */ |
1609 | innermost_block = NULL; | |
d3b9c0df | 1610 | exp = parse_expression (arg); |
f266e564 JK |
1611 | exp_valid_block = innermost_block; |
1612 | val = evaluate_expression (exp); | |
1613 | release_value (val); | |
1614 | ||
1615 | /* Now set up the breakpoint. */ | |
bd5635a1 RP |
1616 | b = set_raw_breakpoint (sal); |
1617 | set_breakpoint_count (breakpoint_count + 1); | |
1618 | b->number = breakpoint_count; | |
30875e1c SG |
1619 | b->type = bp_watchpoint; |
1620 | b->disposition = donttouch; | |
f266e564 JK |
1621 | b->exp = exp; |
1622 | b->exp_valid_block = exp_valid_block; | |
1623 | b->val = val; | |
bd5635a1 RP |
1624 | b->cond = 0; |
1625 | b->cond_string = NULL; | |
1626 | mention (b); | |
1627 | } | |
1628 | \f | |
1629 | /* | |
1630 | * Helper routine for the until_command routine in infcmd.c. Here | |
1631 | * because it uses the mechanisms of breakpoints. | |
1632 | */ | |
bdbd5f50 | 1633 | /* ARGSUSED */ |
bd5635a1 RP |
1634 | void |
1635 | until_break_command (arg, from_tty) | |
1636 | char *arg; | |
1637 | int from_tty; | |
1638 | { | |
1639 | struct symtabs_and_lines sals; | |
1640 | struct symtab_and_line sal; | |
1641 | FRAME prev_frame = get_prev_frame (selected_frame); | |
30875e1c SG |
1642 | struct breakpoint *breakpoint; |
1643 | struct cleanup *old_chain; | |
bd5635a1 RP |
1644 | |
1645 | clear_proceed_status (); | |
1646 | ||
1647 | /* Set a breakpoint where the user wants it and at return from | |
1648 | this function */ | |
1649 | ||
1650 | if (default_breakpoint_valid) | |
1651 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
1652 | default_breakpoint_line); | |
1653 | else | |
1654 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0); | |
1655 | ||
1656 | if (sals.nelts != 1) | |
1657 | error ("Couldn't get information on specified line."); | |
1658 | ||
1659 | sal = sals.sals[0]; | |
1660 | free (sals.sals); /* malloc'd, so freed */ | |
1661 | ||
1662 | if (*arg) | |
1663 | error ("Junk at end of arguments."); | |
1664 | ||
30875e1c | 1665 | resolve_sal_pc (&sal); |
bd5635a1 | 1666 | |
30875e1c | 1667 | breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); |
bd5635a1 | 1668 | |
30875e1c SG |
1669 | old_chain = make_cleanup(delete_breakpoint, breakpoint); |
1670 | ||
bd5635a1 RP |
1671 | /* Keep within the current frame */ |
1672 | ||
1673 | if (prev_frame) | |
1674 | { | |
1675 | struct frame_info *fi; | |
1676 | ||
1677 | fi = get_frame_info (prev_frame); | |
1678 | sal = find_pc_line (fi->pc, 0); | |
1679 | sal.pc = fi->pc; | |
30875e1c SG |
1680 | breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); |
1681 | make_cleanup(delete_breakpoint, breakpoint); | |
bd5635a1 RP |
1682 | } |
1683 | ||
1684 | proceed (-1, -1, 0); | |
30875e1c | 1685 | do_cleanups(old_chain); |
bd5635a1 RP |
1686 | } |
1687 | \f | |
bdbd5f50 JG |
1688 | #if 0 |
1689 | /* These aren't used; I don't konw what they were for. */ | |
bd5635a1 RP |
1690 | /* Set a breakpoint at the catch clause for NAME. */ |
1691 | static int | |
1692 | catch_breakpoint (name) | |
1693 | char *name; | |
1694 | { | |
1695 | } | |
1696 | ||
1697 | static int | |
1698 | disable_catch_breakpoint () | |
1699 | { | |
1700 | } | |
1701 | ||
1702 | static int | |
1703 | delete_catch_breakpoint () | |
1704 | { | |
1705 | } | |
1706 | ||
1707 | static int | |
1708 | enable_catch_breakpoint () | |
1709 | { | |
1710 | } | |
bdbd5f50 | 1711 | #endif /* 0 */ |
bd5635a1 RP |
1712 | |
1713 | struct sal_chain | |
1714 | { | |
1715 | struct sal_chain *next; | |
1716 | struct symtab_and_line sal; | |
1717 | }; | |
1718 | ||
bdbd5f50 JG |
1719 | #if 0 |
1720 | /* This isn't used; I don't know what it was for. */ | |
bd5635a1 RP |
1721 | /* For each catch clause identified in ARGS, run FUNCTION |
1722 | with that clause as an argument. */ | |
1723 | static struct symtabs_and_lines | |
1724 | map_catch_names (args, function) | |
1725 | char *args; | |
1726 | int (*function)(); | |
1727 | { | |
1728 | register char *p = args; | |
1729 | register char *p1; | |
1730 | struct symtabs_and_lines sals; | |
bdbd5f50 | 1731 | #if 0 |
bd5635a1 | 1732 | struct sal_chain *sal_chain = 0; |
bdbd5f50 | 1733 | #endif |
bd5635a1 RP |
1734 | |
1735 | if (p == 0) | |
1736 | error_no_arg ("one or more catch names"); | |
1737 | ||
1738 | sals.nelts = 0; | |
1739 | sals.sals = NULL; | |
1740 | ||
1741 | while (*p) | |
1742 | { | |
1743 | p1 = p; | |
1744 | /* Don't swallow conditional part. */ | |
1745 | if (p1[0] == 'i' && p1[1] == 'f' | |
1746 | && (p1[2] == ' ' || p1[2] == '\t')) | |
1747 | break; | |
1748 | ||
1749 | if (isalpha (*p1)) | |
1750 | { | |
1751 | p1++; | |
1752 | while (isalnum (*p1) || *p1 == '_' || *p1 == '$') | |
1753 | p1++; | |
1754 | } | |
1755 | ||
1756 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
1757 | error ("Arguments must be catch names."); | |
1758 | ||
1759 | *p1 = 0; | |
1760 | #if 0 | |
1761 | if (function (p)) | |
1762 | { | |
1763 | struct sal_chain *next | |
1764 | = (struct sal_chain *)alloca (sizeof (struct sal_chain)); | |
1765 | next->next = sal_chain; | |
1766 | next->sal = get_catch_sal (p); | |
1767 | sal_chain = next; | |
1768 | goto win; | |
1769 | } | |
1770 | #endif | |
1771 | printf ("No catch clause for exception %s.\n", p); | |
bdbd5f50 | 1772 | #if 0 |
bd5635a1 | 1773 | win: |
bdbd5f50 | 1774 | #endif |
bd5635a1 RP |
1775 | p = p1; |
1776 | while (*p == ' ' || *p == '\t') p++; | |
1777 | } | |
1778 | } | |
bdbd5f50 | 1779 | #endif /* 0 */ |
bd5635a1 RP |
1780 | |
1781 | /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ | |
1782 | ||
1783 | static struct symtabs_and_lines | |
1784 | get_catch_sals (this_level_only) | |
1785 | int this_level_only; | |
1786 | { | |
bd5635a1 | 1787 | register struct blockvector *bl; |
777bef06 | 1788 | register struct block *block; |
bd5635a1 | 1789 | int index, have_default = 0; |
777bef06 JK |
1790 | struct frame_info *fi; |
1791 | CORE_ADDR pc; | |
bd5635a1 RP |
1792 | struct symtabs_and_lines sals; |
1793 | struct sal_chain *sal_chain = 0; | |
1794 | char *blocks_searched; | |
1795 | ||
777bef06 JK |
1796 | /* Not sure whether an error message is always the correct response, |
1797 | but it's better than a core dump. */ | |
1798 | if (selected_frame == NULL) | |
1799 | error ("No selected frame."); | |
1800 | block = get_frame_block (selected_frame); | |
1801 | fi = get_frame_info (selected_frame); | |
1802 | pc = fi->pc; | |
1803 | ||
bd5635a1 RP |
1804 | sals.nelts = 0; |
1805 | sals.sals = NULL; | |
1806 | ||
1807 | if (block == 0) | |
1808 | error ("No symbol table info available.\n"); | |
1809 | ||
1810 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); | |
1811 | blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
1812 | bzero (blocks_searched, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
1813 | ||
1814 | while (block != 0) | |
1815 | { | |
1816 | CORE_ADDR end = BLOCK_END (block) - 4; | |
1817 | int last_index; | |
1818 | ||
1819 | if (bl != blockvector_for_pc (end, &index)) | |
1820 | error ("blockvector blotch"); | |
1821 | if (BLOCKVECTOR_BLOCK (bl, index) != block) | |
1822 | error ("blockvector botch"); | |
1823 | last_index = BLOCKVECTOR_NBLOCKS (bl); | |
1824 | index += 1; | |
1825 | ||
1826 | /* Don't print out blocks that have gone by. */ | |
1827 | while (index < last_index | |
1828 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) | |
1829 | index++; | |
1830 | ||
1831 | while (index < last_index | |
1832 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) | |
1833 | { | |
1834 | if (blocks_searched[index] == 0) | |
1835 | { | |
1836 | struct block *b = BLOCKVECTOR_BLOCK (bl, index); | |
1837 | int nsyms; | |
1838 | register int i; | |
1839 | register struct symbol *sym; | |
1840 | ||
1841 | nsyms = BLOCK_NSYMS (b); | |
1842 | ||
1843 | for (i = 0; i < nsyms; i++) | |
1844 | { | |
1845 | sym = BLOCK_SYM (b, i); | |
1846 | if (! strcmp (SYMBOL_NAME (sym), "default")) | |
1847 | { | |
1848 | if (have_default) | |
1849 | continue; | |
1850 | have_default = 1; | |
1851 | } | |
1852 | if (SYMBOL_CLASS (sym) == LOC_LABEL) | |
1853 | { | |
1854 | struct sal_chain *next = (struct sal_chain *) | |
1855 | alloca (sizeof (struct sal_chain)); | |
1856 | next->next = sal_chain; | |
1857 | next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); | |
1858 | sal_chain = next; | |
1859 | } | |
1860 | } | |
1861 | blocks_searched[index] = 1; | |
1862 | } | |
1863 | index++; | |
1864 | } | |
1865 | if (have_default) | |
1866 | break; | |
1867 | if (sal_chain && this_level_only) | |
1868 | break; | |
1869 | ||
1870 | /* After handling the function's top-level block, stop. | |
1871 | Don't continue to its superblock, the block of | |
1872 | per-file symbols. */ | |
1873 | if (BLOCK_FUNCTION (block)) | |
1874 | break; | |
1875 | block = BLOCK_SUPERBLOCK (block); | |
1876 | } | |
1877 | ||
1878 | if (sal_chain) | |
1879 | { | |
1880 | struct sal_chain *tmp_chain; | |
1881 | ||
1882 | /* Count the number of entries. */ | |
1883 | for (index = 0, tmp_chain = sal_chain; tmp_chain; | |
1884 | tmp_chain = tmp_chain->next) | |
1885 | index++; | |
1886 | ||
1887 | sals.nelts = index; | |
1888 | sals.sals = (struct symtab_and_line *) | |
1889 | xmalloc (index * sizeof (struct symtab_and_line)); | |
1890 | for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) | |
1891 | sals.sals[index] = sal_chain->sal; | |
1892 | } | |
1893 | ||
1894 | return sals; | |
1895 | } | |
1896 | ||
1897 | /* Commands to deal with catching exceptions. */ | |
1898 | ||
30875e1c | 1899 | static void |
bd5635a1 RP |
1900 | catch_command_1 (arg, tempflag, from_tty) |
1901 | char *arg; | |
1902 | int tempflag; | |
1903 | int from_tty; | |
1904 | { | |
1905 | /* First, translate ARG into something we can deal with in terms | |
1906 | of breakpoints. */ | |
1907 | ||
1908 | struct symtabs_and_lines sals; | |
1909 | struct symtab_and_line sal; | |
1910 | register struct expression *cond = 0; | |
1911 | register struct breakpoint *b; | |
1912 | char *save_arg; | |
1913 | int i; | |
bd5635a1 RP |
1914 | |
1915 | sal.line = sal.pc = sal.end = 0; | |
1916 | sal.symtab = 0; | |
1917 | ||
1918 | /* If no arg given, or if first arg is 'if ', all active catch clauses | |
1919 | are breakpointed. */ | |
1920 | ||
1921 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
1922 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
1923 | { | |
1924 | /* Grab all active catch clauses. */ | |
1925 | sals = get_catch_sals (0); | |
1926 | } | |
1927 | else | |
1928 | { | |
1929 | /* Grab selected catch clauses. */ | |
1930 | error ("catch NAME not implemeneted"); | |
bdbd5f50 JG |
1931 | #if 0 |
1932 | /* This isn't used; I don't know what it was for. */ | |
bd5635a1 | 1933 | sals = map_catch_names (arg, catch_breakpoint); |
bdbd5f50 | 1934 | #endif |
bd5635a1 RP |
1935 | } |
1936 | ||
1937 | if (! sals.nelts) | |
1938 | return; | |
1939 | ||
1940 | save_arg = arg; | |
1941 | for (i = 0; i < sals.nelts; i++) | |
1942 | { | |
30875e1c | 1943 | resolve_sal_pc (&sals.sals[i]); |
bd5635a1 RP |
1944 | |
1945 | while (arg && *arg) | |
1946 | { | |
1947 | if (arg[0] == 'i' && arg[1] == 'f' | |
1948 | && (arg[2] == ' ' || arg[2] == '\t')) | |
30875e1c SG |
1949 | cond = parse_exp_1 ((arg += 2, &arg), |
1950 | block_for_pc (sals.sals[i].pc), 0); | |
bd5635a1 RP |
1951 | else |
1952 | error ("Junk at end of arguments."); | |
1953 | } | |
1954 | arg = save_arg; | |
bd5635a1 RP |
1955 | } |
1956 | ||
1957 | for (i = 0; i < sals.nelts; i++) | |
1958 | { | |
1959 | sal = sals.sals[i]; | |
1960 | ||
1961 | if (from_tty) | |
1962 | describe_other_breakpoints (sal.pc); | |
1963 | ||
1964 | b = set_raw_breakpoint (sal); | |
30875e1c SG |
1965 | set_breakpoint_count (breakpoint_count + 1); |
1966 | b->number = breakpoint_count; | |
1967 | b->type = bp_breakpoint; | |
bd5635a1 | 1968 | b->cond = cond; |
30875e1c SG |
1969 | b->enable = enabled; |
1970 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 | 1971 | |
d3b9c0df | 1972 | printf ("Breakpoint %d at %s", b->number, local_hex_string(b->address)); |
bd5635a1 RP |
1973 | if (b->symtab) |
1974 | printf (": file %s, line %d.", b->symtab->filename, b->line_number); | |
1975 | printf ("\n"); | |
1976 | } | |
1977 | ||
1978 | if (sals.nelts > 1) | |
1979 | { | |
1980 | printf ("Multiple breakpoints were set.\n"); | |
1981 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
1982 | } | |
1983 | free (sals.sals); | |
1984 | } | |
1985 | ||
bdbd5f50 JG |
1986 | #if 0 |
1987 | /* These aren't used; I don't know what they were for. */ | |
bd5635a1 RP |
1988 | /* Disable breakpoints on all catch clauses described in ARGS. */ |
1989 | static void | |
1990 | disable_catch (args) | |
1991 | char *args; | |
1992 | { | |
1993 | /* Map the disable command to catch clauses described in ARGS. */ | |
1994 | } | |
1995 | ||
1996 | /* Enable breakpoints on all catch clauses described in ARGS. */ | |
1997 | static void | |
1998 | enable_catch (args) | |
1999 | char *args; | |
2000 | { | |
2001 | /* Map the disable command to catch clauses described in ARGS. */ | |
2002 | } | |
2003 | ||
2004 | /* Delete breakpoints on all catch clauses in the active scope. */ | |
2005 | static void | |
2006 | delete_catch (args) | |
2007 | char *args; | |
2008 | { | |
2009 | /* Map the delete command to catch clauses described in ARGS. */ | |
2010 | } | |
bdbd5f50 | 2011 | #endif /* 0 */ |
bd5635a1 RP |
2012 | |
2013 | static void | |
2014 | catch_command (arg, from_tty) | |
2015 | char *arg; | |
2016 | int from_tty; | |
2017 | { | |
2018 | catch_command_1 (arg, 0, from_tty); | |
2019 | } | |
2020 | \f | |
2021 | static void | |
2022 | clear_command (arg, from_tty) | |
2023 | char *arg; | |
2024 | int from_tty; | |
2025 | { | |
2026 | register struct breakpoint *b, *b1; | |
2027 | struct symtabs_and_lines sals; | |
2028 | struct symtab_and_line sal; | |
2029 | register struct breakpoint *found; | |
2030 | int i; | |
2031 | ||
2032 | if (arg) | |
2033 | { | |
2034 | sals = decode_line_spec (arg, 1); | |
2035 | } | |
2036 | else | |
2037 | { | |
2038 | sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); | |
2039 | sal.line = default_breakpoint_line; | |
2040 | sal.symtab = default_breakpoint_symtab; | |
2041 | sal.pc = 0; | |
2042 | if (sal.symtab == 0) | |
2043 | error ("No source file specified."); | |
2044 | ||
2045 | sals.sals[0] = sal; | |
2046 | sals.nelts = 1; | |
2047 | } | |
2048 | ||
2049 | for (i = 0; i < sals.nelts; i++) | |
2050 | { | |
2051 | /* If exact pc given, clear bpts at that pc. | |
2052 | But if sal.pc is zero, clear all bpts on specified line. */ | |
2053 | sal = sals.sals[i]; | |
2054 | found = (struct breakpoint *) 0; | |
2055 | while (breakpoint_chain | |
2056 | && (sal.pc ? breakpoint_chain->address == sal.pc | |
2057 | : (breakpoint_chain->symtab == sal.symtab | |
2058 | && breakpoint_chain->line_number == sal.line))) | |
2059 | { | |
2060 | b1 = breakpoint_chain; | |
2061 | breakpoint_chain = b1->next; | |
2062 | b1->next = found; | |
2063 | found = b1; | |
2064 | } | |
2065 | ||
2066 | ALL_BREAKPOINTS (b) | |
2067 | while (b->next | |
30875e1c | 2068 | && b->next->type != bp_watchpoint |
bd5635a1 RP |
2069 | && (sal.pc ? b->next->address == sal.pc |
2070 | : (b->next->symtab == sal.symtab | |
2071 | && b->next->line_number == sal.line))) | |
2072 | { | |
2073 | b1 = b->next; | |
2074 | b->next = b1->next; | |
2075 | b1->next = found; | |
2076 | found = b1; | |
2077 | } | |
2078 | ||
2079 | if (found == 0) | |
2080 | { | |
2081 | if (arg) | |
2082 | error ("No breakpoint at %s.", arg); | |
2083 | else | |
2084 | error ("No breakpoint at this line."); | |
2085 | } | |
2086 | ||
2087 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ | |
2088 | if (from_tty) printf ("Deleted breakpoint%s ", found->next ? "s" : ""); | |
2089 | while (found) | |
2090 | { | |
2091 | if (from_tty) printf ("%d ", found->number); | |
2092 | b1 = found->next; | |
2093 | delete_breakpoint (found); | |
2094 | found = b1; | |
2095 | } | |
2096 | if (from_tty) putchar ('\n'); | |
2097 | } | |
2098 | free (sals.sals); | |
2099 | } | |
2100 | \f | |
2101 | /* Delete breakpoint in BS if they are `delete' breakpoints. | |
2102 | This is called after any breakpoint is hit, or after errors. */ | |
2103 | ||
2104 | void | |
2105 | breakpoint_auto_delete (bs) | |
2106 | bpstat bs; | |
2107 | { | |
2108 | for (; bs; bs = bs->next) | |
30875e1c | 2109 | if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete) |
bd5635a1 RP |
2110 | delete_breakpoint (bs->breakpoint_at); |
2111 | } | |
2112 | ||
2113 | /* Delete a breakpoint and clean up all traces of it in the data structures. */ | |
2114 | ||
30875e1c | 2115 | void |
bd5635a1 RP |
2116 | delete_breakpoint (bpt) |
2117 | struct breakpoint *bpt; | |
2118 | { | |
2119 | register struct breakpoint *b; | |
2120 | register bpstat bs; | |
2121 | ||
2122 | if (bpt->inserted) | |
2123 | target_remove_breakpoint(bpt->address, bpt->shadow_contents); | |
2124 | ||
2125 | if (breakpoint_chain == bpt) | |
2126 | breakpoint_chain = bpt->next; | |
2127 | ||
2128 | ALL_BREAKPOINTS (b) | |
2129 | if (b->next == bpt) | |
2130 | { | |
2131 | b->next = bpt->next; | |
2132 | break; | |
2133 | } | |
2134 | ||
2135 | check_duplicates (bpt->address); | |
2136 | ||
2137 | free_command_lines (&bpt->commands); | |
2138 | if (bpt->cond) | |
2139 | free (bpt->cond); | |
2140 | if (bpt->cond_string != NULL) | |
2141 | free (bpt->cond_string); | |
2142 | if (bpt->addr_string != NULL) | |
2143 | free (bpt->addr_string); | |
2144 | ||
30875e1c | 2145 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
bd5635a1 RP |
2146 | printf ("breakpoint #%d deleted\n", bpt->number); |
2147 | ||
2148 | /* Be sure no bpstat's are pointing at it after it's been freed. */ | |
2149 | /* FIXME, how can we find all bpstat's? We just check stop_bpstat for now. */ | |
2150 | for (bs = stop_bpstat; bs; bs = bs->next) | |
2151 | if (bs->breakpoint_at == bpt) | |
2152 | bs->breakpoint_at = NULL; | |
2153 | free (bpt); | |
2154 | } | |
2155 | ||
bd5635a1 RP |
2156 | static void |
2157 | delete_command (arg, from_tty) | |
2158 | char *arg; | |
2159 | int from_tty; | |
2160 | { | |
2161 | ||
2162 | if (arg == 0) | |
2163 | { | |
2164 | /* Ask user only if there are some breakpoints to delete. */ | |
2165 | if (!from_tty | |
2166 | || (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0))) | |
2167 | { | |
2168 | /* No arg; clear all breakpoints. */ | |
2169 | while (breakpoint_chain) | |
2170 | delete_breakpoint (breakpoint_chain); | |
2171 | } | |
2172 | } | |
2173 | else | |
2174 | map_breakpoint_numbers (arg, delete_breakpoint); | |
2175 | } | |
2176 | ||
bdbd5f50 JG |
2177 | /* Reset a breakpoint given it's struct breakpoint * BINT. |
2178 | The value we return ends up being the return value from catch_errors. | |
2179 | Unused in this case. */ | |
2180 | ||
2181 | static int | |
bd5635a1 | 2182 | breakpoint_re_set_one (bint) |
bdbd5f50 | 2183 | char *bint; |
bd5635a1 RP |
2184 | { |
2185 | struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ | |
2186 | int i; | |
2187 | struct symtabs_and_lines sals; | |
bd5635a1 | 2188 | char *s; |
30875e1c | 2189 | enum enable save_enable; |
bd5635a1 | 2190 | |
30875e1c | 2191 | if (b->type != bp_watchpoint && b->addr_string != NULL) |
bd5635a1 | 2192 | { |
30875e1c SG |
2193 | /* In case we have a problem, disable this breakpoint. We'll restore |
2194 | its status if we succeed. */ | |
2195 | save_enable = b->enable; | |
2196 | b->enable = disabled; | |
2197 | ||
bd5635a1 RP |
2198 | s = b->addr_string; |
2199 | sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0); | |
2200 | for (i = 0; i < sals.nelts; i++) | |
2201 | { | |
30875e1c SG |
2202 | resolve_sal_pc (&sals.sals[i]); |
2203 | b->symtab = sals.sals[i].symtab; | |
2204 | b->line_number = sals.sals[i].line; | |
2205 | b->address = sals.sals[i].pc; | |
bd5635a1 RP |
2206 | |
2207 | if (b->cond_string != NULL) | |
2208 | { | |
2209 | s = b->cond_string; | |
30875e1c | 2210 | b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); |
bd5635a1 RP |
2211 | } |
2212 | ||
2213 | check_duplicates (b->address); | |
2214 | ||
30875e1c | 2215 | b->enable = save_enable; /* Restore it, this worked. */ |
bd5635a1 RP |
2216 | mention (b); |
2217 | } | |
2218 | free (sals.sals); | |
2219 | } | |
2220 | else | |
2221 | { | |
2222 | /* Anything without a string can't be re-set. */ | |
2223 | delete_breakpoint (b); | |
2224 | } | |
bdbd5f50 | 2225 | return 0; |
bd5635a1 RP |
2226 | } |
2227 | ||
2228 | /* Re-set all breakpoints after symbols have been re-loaded. */ | |
2229 | void | |
2230 | breakpoint_re_set () | |
2231 | { | |
2232 | struct breakpoint *b; | |
30875e1c SG |
2233 | static char message1[] = "Error in re-setting breakpoint %d:\n"; |
2234 | char message[sizeof (message1) + 30 /* slop */]; | |
bd5635a1 RP |
2235 | |
2236 | ALL_BREAKPOINTS (b) | |
2237 | { | |
2238 | b->symtab = 0; /* Be sure we don't point to old dead symtab */ | |
30875e1c SG |
2239 | sprintf (message, message1, b->number); /* Format possible error msg */ |
2240 | (void) catch_errors (breakpoint_re_set_one, (char *) b, message); | |
bd5635a1 RP |
2241 | } |
2242 | ||
2243 | /* Blank line to finish off all those mention() messages we just printed. */ | |
2244 | printf_filtered ("\n"); | |
2245 | } | |
2246 | \f | |
2247 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |
2248 | If from_tty is nonzero, it prints a message to that effect, | |
2249 | which ends with a period (no newline). */ | |
2250 | ||
2251 | void | |
2252 | set_ignore_count (bptnum, count, from_tty) | |
2253 | int bptnum, count, from_tty; | |
2254 | { | |
2255 | register struct breakpoint *b; | |
2256 | ||
2257 | if (count < 0) | |
2258 | count = 0; | |
2259 | ||
2260 | ALL_BREAKPOINTS (b) | |
2261 | if (b->number == bptnum) | |
2262 | { | |
2263 | b->ignore_count = count; | |
2264 | if (!from_tty) | |
2265 | return; | |
2266 | else if (count == 0) | |
2267 | printf ("Will stop next time breakpoint %d is reached.", bptnum); | |
2268 | else if (count == 1) | |
2269 | printf ("Will ignore next crossing of breakpoint %d.", bptnum); | |
2270 | else | |
2271 | printf ("Will ignore next %d crossings of breakpoint %d.", | |
2272 | count, bptnum); | |
2273 | return; | |
2274 | } | |
2275 | ||
2276 | error ("No breakpoint number %d.", bptnum); | |
2277 | } | |
2278 | ||
2279 | /* Clear the ignore counts of all breakpoints. */ | |
2280 | void | |
2281 | breakpoint_clear_ignore_counts () | |
2282 | { | |
2283 | struct breakpoint *b; | |
2284 | ||
2285 | ALL_BREAKPOINTS (b) | |
2286 | b->ignore_count = 0; | |
2287 | } | |
2288 | ||
2289 | /* Command to set ignore-count of breakpoint N to COUNT. */ | |
2290 | ||
2291 | static void | |
2292 | ignore_command (args, from_tty) | |
2293 | char *args; | |
2294 | int from_tty; | |
2295 | { | |
2296 | char *p = args; | |
2297 | register int num; | |
2298 | ||
2299 | if (p == 0) | |
2300 | error_no_arg ("a breakpoint number"); | |
2301 | ||
2302 | num = get_number (&p); | |
2303 | ||
2304 | if (*p == 0) | |
2305 | error ("Second argument (specified ignore-count) is missing."); | |
2306 | ||
bdbd5f50 JG |
2307 | set_ignore_count (num, |
2308 | longest_to_int (value_as_long (parse_and_eval (p))), | |
2309 | from_tty); | |
bd5635a1 RP |
2310 | printf ("\n"); |
2311 | } | |
2312 | \f | |
2313 | /* Call FUNCTION on each of the breakpoints | |
2314 | whose numbers are given in ARGS. */ | |
2315 | ||
2316 | static void | |
2317 | map_breakpoint_numbers (args, function) | |
2318 | char *args; | |
30875e1c | 2319 | void (*function) PARAMS ((struct breakpoint *)); |
bd5635a1 RP |
2320 | { |
2321 | register char *p = args; | |
2322 | char *p1; | |
2323 | register int num; | |
2324 | register struct breakpoint *b; | |
2325 | ||
2326 | if (p == 0) | |
2327 | error_no_arg ("one or more breakpoint numbers"); | |
2328 | ||
2329 | while (*p) | |
2330 | { | |
2331 | p1 = p; | |
2332 | ||
2333 | num = get_number (&p1); | |
2334 | ||
2335 | ALL_BREAKPOINTS (b) | |
2336 | if (b->number == num) | |
2337 | { | |
2338 | function (b); | |
2339 | goto win; | |
2340 | } | |
2341 | printf ("No breakpoint number %d.\n", num); | |
2342 | win: | |
2343 | p = p1; | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | static void | |
2348 | enable_breakpoint (bpt) | |
2349 | struct breakpoint *bpt; | |
2350 | { | |
2351 | bpt->enable = enabled; | |
2352 | ||
30875e1c | 2353 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
bd5635a1 RP |
2354 | printf ("breakpoint #%d enabled\n", bpt->number); |
2355 | ||
2356 | check_duplicates (bpt->address); | |
30875e1c | 2357 | if (bpt->type == bp_watchpoint) |
bd5635a1 | 2358 | { |
f266e564 JK |
2359 | if (bpt->exp_valid_block != NULL |
2360 | && !contained_in (get_selected_block (), bpt->exp_valid_block)) | |
2361 | { | |
2362 | printf_filtered ("\ | |
2363 | Cannot enable watchpoint %d because the block in which its expression\n\ | |
2364 | is valid is not currently in scope.\n", bpt->number); | |
2365 | return; | |
2366 | } | |
2367 | ||
bd5635a1 RP |
2368 | value_free (bpt->val); |
2369 | ||
2370 | bpt->val = evaluate_expression (bpt->exp); | |
2371 | release_value (bpt->val); | |
2372 | } | |
2373 | } | |
2374 | ||
bdbd5f50 | 2375 | /* ARGSUSED */ |
bd5635a1 RP |
2376 | static void |
2377 | enable_command (args, from_tty) | |
2378 | char *args; | |
2379 | int from_tty; | |
2380 | { | |
2381 | struct breakpoint *bpt; | |
2382 | if (args == 0) | |
2383 | ALL_BREAKPOINTS (bpt) | |
2384 | enable_breakpoint (bpt); | |
2385 | else | |
2386 | map_breakpoint_numbers (args, enable_breakpoint); | |
2387 | } | |
2388 | ||
2389 | static void | |
2390 | disable_breakpoint (bpt) | |
2391 | struct breakpoint *bpt; | |
2392 | { | |
2393 | bpt->enable = disabled; | |
2394 | ||
30875e1c | 2395 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
bd5635a1 RP |
2396 | printf ("breakpoint #%d disabled\n", bpt->number); |
2397 | ||
2398 | check_duplicates (bpt->address); | |
2399 | } | |
2400 | ||
bdbd5f50 | 2401 | /* ARGSUSED */ |
bd5635a1 RP |
2402 | static void |
2403 | disable_command (args, from_tty) | |
2404 | char *args; | |
2405 | int from_tty; | |
2406 | { | |
2407 | register struct breakpoint *bpt; | |
2408 | if (args == 0) | |
2409 | ALL_BREAKPOINTS (bpt) | |
2410 | disable_breakpoint (bpt); | |
2411 | else | |
2412 | map_breakpoint_numbers (args, disable_breakpoint); | |
2413 | } | |
2414 | ||
2415 | static void | |
2416 | enable_once_breakpoint (bpt) | |
2417 | struct breakpoint *bpt; | |
2418 | { | |
30875e1c SG |
2419 | bpt->enable = enabled; |
2420 | bpt->disposition = disable; | |
bd5635a1 RP |
2421 | |
2422 | check_duplicates (bpt->address); | |
2423 | } | |
2424 | ||
bdbd5f50 | 2425 | /* ARGSUSED */ |
bd5635a1 RP |
2426 | static void |
2427 | enable_once_command (args, from_tty) | |
2428 | char *args; | |
2429 | int from_tty; | |
2430 | { | |
2431 | map_breakpoint_numbers (args, enable_once_breakpoint); | |
2432 | } | |
2433 | ||
2434 | static void | |
2435 | enable_delete_breakpoint (bpt) | |
2436 | struct breakpoint *bpt; | |
2437 | { | |
30875e1c SG |
2438 | bpt->enable = enabled; |
2439 | bpt->disposition = delete; | |
bd5635a1 RP |
2440 | |
2441 | check_duplicates (bpt->address); | |
2442 | } | |
2443 | ||
bdbd5f50 | 2444 | /* ARGSUSED */ |
bd5635a1 RP |
2445 | static void |
2446 | enable_delete_command (args, from_tty) | |
2447 | char *args; | |
2448 | int from_tty; | |
2449 | { | |
2450 | map_breakpoint_numbers (args, enable_delete_breakpoint); | |
2451 | } | |
2452 | \f | |
2453 | /* | |
2454 | * Use default_breakpoint_'s, or nothing if they aren't valid. | |
2455 | */ | |
2456 | struct symtabs_and_lines | |
2457 | decode_line_spec_1 (string, funfirstline) | |
2458 | char *string; | |
2459 | int funfirstline; | |
2460 | { | |
2461 | struct symtabs_and_lines sals; | |
2462 | if (string == 0) | |
2463 | error ("Empty line specification."); | |
2464 | if (default_breakpoint_valid) | |
2465 | sals = decode_line_1 (&string, funfirstline, | |
2466 | default_breakpoint_symtab, default_breakpoint_line); | |
2467 | else | |
2468 | sals = decode_line_1 (&string, funfirstline, (struct symtab *)NULL, 0); | |
2469 | if (*string) | |
2470 | error ("Junk at end of line specification: %s", string); | |
2471 | return sals; | |
2472 | } | |
2473 | \f | |
2474 | ||
2475 | /* Chain containing all defined enable commands. */ | |
2476 | ||
2477 | extern struct cmd_list_element | |
2478 | *enablelist, *disablelist, | |
2479 | *deletelist, *enablebreaklist; | |
2480 | ||
2481 | extern struct cmd_list_element *cmdlist; | |
2482 | ||
2483 | void | |
2484 | _initialize_breakpoint () | |
2485 | { | |
2486 | breakpoint_chain = 0; | |
2487 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful | |
2488 | before a breakpoint is set. */ | |
2489 | breakpoint_count = 0; | |
2490 | ||
2491 | add_com ("ignore", class_breakpoint, ignore_command, | |
2492 | "Set ignore-count of breakpoint number N to COUNT."); | |
2493 | ||
2494 | add_com ("commands", class_breakpoint, commands_command, | |
2495 | "Set commands to be executed when a breakpoint is hit.\n\ | |
2496 | Give breakpoint number as argument after \"commands\".\n\ | |
2497 | With no argument, the targeted breakpoint is the last one set.\n\ | |
2498 | The commands themselves follow starting on the next line.\n\ | |
2499 | Type a line containing \"end\" to indicate the end of them.\n\ | |
2500 | Give \"silent\" as the first line to make the breakpoint silent;\n\ | |
2501 | then no output is printed when it is hit, except what the commands print."); | |
2502 | ||
2503 | add_com ("condition", class_breakpoint, condition_command, | |
2504 | "Specify breakpoint number N to break only if COND is true.\n\ | |
d3b9c0df JG |
2505 | N is an integer; COND is an expression to be evaluated whenever\n\ |
2506 | breakpoint N is reached. "); | |
bd5635a1 RP |
2507 | |
2508 | add_com ("tbreak", class_breakpoint, tbreak_command, | |
2509 | "Set a temporary breakpoint. Args like \"break\" command.\n\ | |
2510 | Like \"break\" except the breakpoint is only enabled temporarily,\n\ | |
2511 | so it will be disabled when hit. Equivalent to \"break\" followed\n\ | |
2512 | by using \"enable once\" on the breakpoint number."); | |
2513 | ||
2514 | add_prefix_cmd ("enable", class_breakpoint, enable_command, | |
2515 | "Enable some breakpoints.\n\ | |
2516 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
2517 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
2518 | This is used to cancel the effect of the \"disable\" command.\n\ | |
2519 | With a subcommand you can enable temporarily.", | |
2520 | &enablelist, "enable ", 1, &cmdlist); | |
2521 | ||
2522 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, | |
2523 | "Enable some breakpoints.\n\ | |
2524 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
2525 | This is used to cancel the effect of the \"disable\" command.\n\ | |
2526 | May be abbreviated to simply \"enable\".\n", | |
2527 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); | |
2528 | ||
2529 | add_cmd ("once", no_class, enable_once_command, | |
2530 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
2531 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ | |
2532 | See the \"tbreak\" command which sets a breakpoint and enables it once.", | |
2533 | &enablebreaklist); | |
2534 | ||
2535 | add_cmd ("delete", no_class, enable_delete_command, | |
2536 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
2537 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
2538 | &enablebreaklist); | |
2539 | ||
2540 | add_cmd ("delete", no_class, enable_delete_command, | |
2541 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
2542 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
2543 | &enablelist); | |
2544 | ||
2545 | add_cmd ("once", no_class, enable_once_command, | |
2546 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
2547 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ | |
2548 | See the \"tbreak\" command which sets a breakpoint and enables it once.", | |
2549 | &enablelist); | |
2550 | ||
2551 | add_prefix_cmd ("disable", class_breakpoint, disable_command, | |
2552 | "Disable some breakpoints.\n\ | |
2553 | Arguments are breakpoint numbers with spaces in between.\n\ | |
2554 | To disable all breakpoints, give no argument.\n\ | |
2555 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", | |
2556 | &disablelist, "disable ", 1, &cmdlist); | |
2557 | add_com_alias ("dis", "disable", class_breakpoint, 1); | |
2558 | add_com_alias ("disa", "disable", class_breakpoint, 1); | |
2559 | ||
2560 | add_cmd ("breakpoints", class_alias, disable_command, | |
2561 | "Disable some breakpoints.\n\ | |
2562 | Arguments are breakpoint numbers with spaces in between.\n\ | |
2563 | To disable all breakpoints, give no argument.\n\ | |
2564 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |
2565 | This command may be abbreviated \"disable\".", | |
2566 | &disablelist); | |
2567 | ||
2568 | add_prefix_cmd ("delete", class_breakpoint, delete_command, | |
2569 | "Delete some breakpoints or auto-display expressions.\n\ | |
2570 | Arguments are breakpoint numbers with spaces in between.\n\ | |
2571 | To delete all breakpoints, give no argument.\n\ | |
2572 | \n\ | |
2573 | Also a prefix command for deletion of other GDB objects.\n\ | |
2574 | The \"unset\" command is also an alias for \"delete\".", | |
2575 | &deletelist, "delete ", 1, &cmdlist); | |
2576 | add_com_alias ("d", "delete", class_breakpoint, 1); | |
bd5635a1 RP |
2577 | |
2578 | add_cmd ("breakpoints", class_alias, delete_command, | |
2579 | "Delete some breakpoints or auto-display expressions.\n\ | |
2580 | Arguments are breakpoint numbers with spaces in between.\n\ | |
2581 | To delete all breakpoints, give no argument.\n\ | |
2582 | This command may be abbreviated \"delete\".", | |
2583 | &deletelist); | |
2584 | ||
2585 | add_com ("clear", class_breakpoint, clear_command, | |
2586 | "Clear breakpoint at specified line or function.\n\ | |
2587 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
2588 | If line number is specified, all breakpoints in that line are cleared.\n\ | |
2589 | If function is specified, breakpoints at beginning of function are cleared.\n\ | |
2590 | If an address is specified, breakpoints at that address are cleared.\n\n\ | |
2591 | With no argument, clears all breakpoints in the line that the selected frame\n\ | |
2592 | is executing in.\n\ | |
2593 | \n\ | |
2594 | See also the \"delete\" command which clears breakpoints by number."); | |
2595 | ||
2596 | add_com ("break", class_breakpoint, break_command, | |
2597 | "Set breakpoint at specified line or function.\n\ | |
2598 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
2599 | If line number is specified, break at start of code for that line.\n\ | |
2600 | If function is specified, break at start of code for that function.\n\ | |
2601 | If an address is specified, break at that exact address.\n\ | |
2602 | With no arg, uses current execution address of selected stack frame.\n\ | |
2603 | This is useful for breaking on return to a stack frame.\n\ | |
2604 | \n\ | |
2605 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
2606 | \n\ | |
2607 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
2608 | add_com_alias ("b", "break", class_run, 1); | |
2609 | add_com_alias ("br", "break", class_run, 1); | |
2610 | add_com_alias ("bre", "break", class_run, 1); | |
2611 | add_com_alias ("brea", "break", class_run, 1); | |
2612 | ||
2613 | add_info ("breakpoints", breakpoints_info, | |
2614 | "Status of all breakpoints, or breakpoint number NUMBER.\n\ | |
2615 | Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\ | |
2616 | \"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\ | |
2617 | Then come the address and the file/line number.\n\n\ | |
2618 | Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
2619 | are set to the address of the last breakpoint listed.\n\n\ | |
2620 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
2621 | breakpoint set."); | |
2622 | ||
2623 | add_com ("catch", class_breakpoint, catch_command, | |
2624 | "Set breakpoints to catch exceptions that are raised.\n\ | |
2625 | Argument may be a single exception to catch, multiple exceptions\n\ | |
2626 | to catch, or the default exception \"default\". If no arguments\n\ | |
2627 | are given, breakpoints are set at all exception handlers catch clauses\n\ | |
2628 | within the current scope.\n\ | |
2629 | \n\ | |
2630 | A condition specified for the catch applies to all breakpoints set\n\ | |
2631 | with this command\n\ | |
2632 | \n\ | |
2633 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
2634 | ||
2635 | add_com ("watch", class_breakpoint, watch_command, | |
2636 | "Set a watchpoint for an expression.\n\ | |
2637 | A watchpoint stops execution of your program whenever the value of\n\ | |
2638 | an expression changes."); | |
2639 | ||
2640 | add_info ("watchpoints", watchpoints_info, | |
2641 | "Status of all watchpoints, or watchpoint number NUMBER.\n\ | |
2642 | Second column is \"y\" for enabled watchpoints, \"n\" for disabled."); | |
2643 | } |