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bd5635a1 RP |
1 | /* Everything about breakpoints, for GDB. |
2 | Copyright (C) 1986, 1987, 1989, 1990 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | GDB is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GDB is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GDB; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #include <stdio.h> | |
21 | #include <ctype.h> | |
22 | #include "defs.h" | |
23 | #include "param.h" | |
24 | #include "symtab.h" | |
25 | #include "frame.h" | |
26 | #include "breakpoint.h" | |
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" | |
35 | #include <string.h> | |
36 | ||
37 | extern int addressprint; /* Print machine addresses? */ | |
38 | extern int demangle; /* Print de-mangled symbol names? */ | |
39 | ||
40 | extern int catch_errors (); | |
41 | extern void set_next_address (); /* ...for x/ command */ | |
42 | ||
43 | /* Are we executing breakpoint commands? */ | |
44 | static int executing_breakpoint_commands; | |
45 | ||
46 | /* States of enablement of breakpoint. | |
47 | `temporary' means disable when hit. | |
48 | `delete' means delete when hit. */ | |
49 | ||
50 | enum enable { disabled, enabled, temporary, delete}; | |
51 | ||
52 | /* Not that the ->silent field is not currently used by any commands | |
f266e564 | 53 | (though the code is in there if it was to be, and set_raw_breakpoint |
bd5635a1 RP |
54 | does set it to 0). I implemented it because I thought it would be |
55 | useful for a hack I had to put in; I'm going to leave it in because | |
56 | I can see how there might be times when it would indeed be useful */ | |
57 | ||
58 | /* This is for a breakpoint or a watchpoint. */ | |
59 | ||
60 | struct breakpoint | |
61 | { | |
62 | struct breakpoint *next; | |
63 | /* Number assigned to distinguish breakpoints. */ | |
64 | int number; | |
65 | /* Address to break at, or NULL if not a breakpoint. */ | |
66 | CORE_ADDR address; | |
67 | /* Line number of this address. Redundant. Only matters if address | |
68 | is non-NULL. */ | |
69 | int line_number; | |
70 | /* Symtab of file of this address. Redundant. Only matters if address | |
71 | is non-NULL. */ | |
72 | struct symtab *symtab; | |
73 | /* Zero means disabled; remember the info but don't break here. */ | |
74 | enum enable enable; | |
75 | /* Non-zero means a silent breakpoint (don't print frame info | |
76 | if we stop here). */ | |
77 | unsigned char silent; | |
78 | /* Number of stops at this breakpoint that should | |
79 | be continued automatically before really stopping. */ | |
80 | int ignore_count; | |
81 | /* "Real" contents of byte where breakpoint has been inserted. | |
82 | Valid only when breakpoints are in the program. Under the complete | |
83 | control of the target insert_breakpoint and remove_breakpoint routines. | |
84 | No other code should assume anything about the value(s) here. */ | |
85 | char shadow_contents[BREAKPOINT_MAX]; | |
86 | /* Nonzero if this breakpoint is now inserted. Only matters if address | |
87 | is non-NULL. */ | |
88 | char inserted; | |
89 | /* Nonzero if this is not the first breakpoint in the list | |
90 | for the given address. Only matters if address is non-NULL. */ | |
91 | char duplicate; | |
92 | /* Chain of command lines to execute when this breakpoint is hit. */ | |
93 | struct command_line *commands; | |
94 | /* Stack depth (address of frame). If nonzero, break only if fp | |
95 | equals this. */ | |
96 | FRAME_ADDR frame; | |
97 | /* Conditional. Break only if this expression's value is nonzero. */ | |
98 | struct expression *cond; | |
99 | ||
100 | /* String we used to set the breakpoint (malloc'd). Only matters if | |
101 | address is non-NULL. */ | |
102 | char *addr_string; | |
103 | /* String form of the breakpoint condition (malloc'd), or NULL if there | |
104 | is no condition. */ | |
105 | char *cond_string; | |
106 | ||
107 | /* The expression we are watching, or NULL if not a watchpoint. */ | |
108 | struct expression *exp; | |
109 | /* The largest block within which it is valid, or NULL if it is | |
110 | valid anywhere (e.g. consists just of global symbols). */ | |
111 | struct block *exp_valid_block; | |
112 | /* Value of the watchpoint the last time we checked it. */ | |
113 | value val; | |
114 | }; | |
115 | ||
116 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) | |
117 | ||
118 | /* Chain of all breakpoints defined. */ | |
119 | ||
120 | struct breakpoint *breakpoint_chain; | |
121 | ||
122 | /* Number of last breakpoint made. */ | |
123 | ||
124 | static int breakpoint_count; | |
125 | ||
126 | /* Set breakpoint count to NUM. */ | |
127 | static void | |
128 | set_breakpoint_count (num) | |
129 | int num; | |
130 | { | |
131 | breakpoint_count = num; | |
132 | set_internalvar (lookup_internalvar ("bpnum"), | |
133 | value_from_long (builtin_type_int, (LONGEST) num)); | |
134 | } | |
135 | ||
136 | /* Default address, symtab and line to put a breakpoint at | |
137 | for "break" command with no arg. | |
138 | if default_breakpoint_valid is zero, the other three are | |
139 | not valid, and "break" with no arg is an error. | |
140 | ||
141 | This set by print_stack_frame, which calls set_default_breakpoint. */ | |
142 | ||
143 | int default_breakpoint_valid; | |
144 | CORE_ADDR default_breakpoint_address; | |
145 | struct symtab *default_breakpoint_symtab; | |
146 | int default_breakpoint_line; | |
147 | ||
148 | static void delete_breakpoint (); | |
149 | void breakpoint_auto_delete (); | |
150 | ||
151 | /* Flag indicating extra verbosity for xgdb. */ | |
152 | extern int xgdb_verbose; | |
153 | \f | |
154 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. | |
155 | Advance *PP after the string and any trailing whitespace. | |
156 | ||
157 | Currently the string can either be a number or "$" followed by the name | |
158 | of a convenience variable. Making it an expression wouldn't work well | |
159 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ | |
160 | static int | |
161 | get_number (pp) | |
162 | char **pp; | |
163 | { | |
164 | int retval; | |
165 | char *p = *pp; | |
166 | ||
167 | if (p == NULL) | |
168 | /* Empty line means refer to the last breakpoint. */ | |
169 | return breakpoint_count; | |
170 | else if (*p == '$') | |
171 | { | |
172 | /* Make a copy of the name, so we can null-terminate it | |
173 | to pass to lookup_internalvar(). */ | |
174 | char *varname; | |
175 | char *start = ++p; | |
176 | value val; | |
177 | ||
178 | while (isalnum (*p) || *p == '_') | |
179 | p++; | |
180 | varname = (char *) alloca (p - start + 1); | |
181 | strncpy (varname, start, p - start); | |
182 | varname[p - start] = '\0'; | |
183 | val = value_of_internalvar (lookup_internalvar (varname)); | |
184 | if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT) | |
185 | error ( | |
186 | "Convenience variables used to specify breakpoints must have integer values." | |
187 | ); | |
188 | retval = (int) value_as_long (val); | |
189 | } | |
190 | else | |
191 | { | |
192 | while (*p >= '0' && *p <= '9') | |
193 | ++p; | |
194 | if (p == *pp) | |
195 | /* There is no number here. (e.g. "cond a == b"). */ | |
196 | error_no_arg ("breakpoint number"); | |
197 | retval = atoi (*pp); | |
198 | } | |
199 | if (!(isspace (*p) || *p == '\0')) | |
200 | error ("breakpoint number expected"); | |
201 | while (isspace (*p)) | |
202 | p++; | |
203 | *pp = p; | |
204 | return retval; | |
205 | } | |
206 | \f | |
207 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ | |
208 | ||
209 | static void | |
210 | condition_command (arg, from_tty) | |
211 | char *arg; | |
212 | int from_tty; | |
213 | { | |
214 | register struct breakpoint *b; | |
215 | char *p; | |
216 | register int bnum; | |
217 | ||
218 | if (arg == 0) | |
219 | error_no_arg ("breakpoint number"); | |
220 | ||
221 | p = arg; | |
222 | bnum = get_number (&p); | |
223 | ||
224 | ALL_BREAKPOINTS (b) | |
225 | if (b->number == bnum) | |
226 | { | |
227 | if (b->cond) | |
228 | { | |
229 | free (b->cond); | |
230 | b->cond = 0; | |
231 | } | |
232 | if (b->cond_string != NULL) | |
233 | free (b->cond_string); | |
234 | ||
235 | if (*p == 0) | |
236 | { | |
237 | b->cond = 0; | |
238 | b->cond_string = NULL; | |
239 | if (from_tty) | |
240 | printf ("Breakpoint %d now unconditional.\n", bnum); | |
241 | } | |
242 | else | |
243 | { | |
244 | arg = p; | |
245 | /* I don't know if it matters whether this is the string the user | |
246 | typed in or the decompiled expression. */ | |
247 | b->cond_string = savestring (arg, strlen (arg)); | |
248 | b->cond = parse_c_1 (&arg, block_for_pc (b->address), 0); | |
249 | if (*arg) | |
250 | error ("Junk at end of expression"); | |
251 | } | |
252 | return; | |
253 | } | |
254 | ||
255 | error ("No breakpoint number %d.", bnum); | |
256 | } | |
257 | ||
258 | static void | |
259 | commands_command (arg, from_tty) | |
260 | char *arg; | |
261 | int from_tty; | |
262 | { | |
263 | register struct breakpoint *b; | |
264 | char *p; | |
265 | register int bnum; | |
266 | struct command_line *l; | |
267 | ||
268 | /* If we allowed this, we would have problems with when to | |
269 | free the storage, if we change the commands currently | |
270 | being read from. */ | |
271 | ||
272 | if (executing_breakpoint_commands) | |
273 | error ("Can't use the \"commands\" command among a breakpoint's commands."); | |
274 | ||
275 | p = arg; | |
276 | bnum = get_number (&p); | |
277 | if (p && *p) | |
278 | error ("Unexpected extra arguments following breakpoint number."); | |
279 | ||
280 | ALL_BREAKPOINTS (b) | |
281 | if (b->number == bnum) | |
282 | { | |
283 | if (input_from_terminal_p ()) | |
284 | { | |
285 | printf ("Type commands for when breakpoint %d is hit, one per line.\n\ | |
286 | End with a line saying just \"end\".\n", bnum); | |
287 | fflush (stdout); | |
288 | } | |
289 | l = read_command_lines (); | |
290 | free_command_lines (&b->commands); | |
291 | b->commands = l; | |
292 | return; | |
293 | } | |
294 | error ("No breakpoint number %d.", bnum); | |
295 | } | |
296 | \f | |
31ef19fc JK |
297 | extern int memory_breakpoint_size; /* from mem-break.c */ |
298 | ||
299 | /* Like target_read_memory() but if breakpoints are inserted, return | |
300 | the shadow contents instead of the breakpoints themselves. */ | |
301 | int | |
302 | read_memory_nobpt (memaddr, myaddr, len) | |
303 | CORE_ADDR memaddr; | |
304 | char *myaddr; | |
305 | unsigned len; | |
306 | { | |
307 | int status; | |
308 | struct breakpoint *b; | |
309 | ||
310 | if (memory_breakpoint_size < 0) | |
311 | /* No breakpoints on this machine. */ | |
312 | return target_read_memory (memaddr, myaddr, len); | |
313 | ||
314 | ALL_BREAKPOINTS (b) | |
315 | { | |
316 | if (b->address == NULL || !b->inserted) | |
317 | continue; | |
318 | else if (b->address + memory_breakpoint_size <= memaddr) | |
319 | /* The breakpoint is entirely before the chunk of memory | |
320 | we are reading. */ | |
321 | continue; | |
322 | else if (b->address >= memaddr + len) | |
323 | /* The breakpoint is entirely after the chunk of memory we | |
324 | are reading. */ | |
325 | continue; | |
326 | else | |
327 | { | |
328 | /* Copy the breakpoint from the shadow contents, and recurse | |
329 | for the things before and after. */ | |
330 | ||
331 | /* Addresses and length of the part of the breakpoint that | |
332 | we need to copy. */ | |
333 | CORE_ADDR membpt = b->address; | |
334 | unsigned int bptlen = memory_breakpoint_size; | |
335 | /* Offset within shadow_contents. */ | |
336 | int bptoffset = 0; | |
337 | ||
338 | if (membpt < memaddr) | |
339 | { | |
340 | /* Only copy the second part of the breakpoint. */ | |
341 | bptlen -= memaddr - membpt; | |
342 | bptoffset = memaddr - membpt; | |
343 | membpt = memaddr; | |
344 | } | |
345 | ||
346 | if (membpt + bptlen > memaddr + len) | |
347 | { | |
348 | /* Only copy the first part of the breakpoint. */ | |
349 | bptlen -= (membpt + bptlen) - (memaddr + len); | |
350 | } | |
351 | ||
352 | bcopy (b->shadow_contents + bptoffset, | |
353 | myaddr + membpt - memaddr, bptlen); | |
354 | ||
355 | if (membpt > memaddr) | |
356 | { | |
357 | /* Copy the section of memory before the breakpoint. */ | |
358 | status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr); | |
359 | if (status != 0) | |
360 | return status; | |
361 | } | |
362 | ||
363 | if (membpt + bptlen < memaddr + len) | |
364 | { | |
365 | /* Copy the section of memory after the breakpoint. */ | |
366 | status = read_memory_nobpt | |
367 | (membpt + bptlen, | |
368 | myaddr + membpt + bptlen - memaddr, | |
369 | memaddr + len - (membpt + bptlen)); | |
370 | if (status != 0) | |
371 | return status; | |
372 | } | |
373 | return 0; | |
374 | } | |
375 | } | |
376 | /* Nothing overlaps. Just call read_memory_noerr. */ | |
377 | return target_read_memory (memaddr, myaddr, len); | |
378 | } | |
379 | \f | |
bd5635a1 RP |
380 | /* insert_breakpoints is used when starting or continuing the program. |
381 | remove_breakpoints is used when the program stops. | |
382 | Both return zero if successful, | |
383 | or an `errno' value if could not write the inferior. */ | |
384 | ||
385 | int | |
386 | insert_breakpoints () | |
387 | { | |
388 | register struct breakpoint *b; | |
389 | int val = 0; | |
390 | int disabled_breaks = 0; | |
391 | ||
392 | ALL_BREAKPOINTS (b) | |
393 | if (b->address != NULL | |
394 | && b->enable != disabled | |
395 | && ! b->inserted | |
396 | && ! b->duplicate) | |
397 | { | |
398 | val = target_insert_breakpoint(b->address, b->shadow_contents); | |
399 | if (val) | |
400 | { | |
401 | /* Can't set the breakpoint. */ | |
402 | #if defined (DISABLE_UNSETTABLE_BREAK) | |
403 | if (DISABLE_UNSETTABLE_BREAK (b->address)) | |
404 | { | |
405 | val = 0; | |
406 | b->enable = disabled; | |
407 | if (!disabled_breaks) | |
408 | { | |
409 | fprintf (stderr, | |
410 | "Cannot insert breakpoint %d:\n", b->number); | |
411 | printf_filtered ("Disabling shared library breakpoints:\n"); | |
412 | } | |
413 | disabled_breaks = 1; | |
414 | printf_filtered ("%d ", b->number); | |
415 | } | |
416 | else | |
417 | #endif | |
418 | { | |
419 | fprintf (stderr, "Cannot insert breakpoint %d:\n", b->number); | |
420 | memory_error (val, b->address); /* which bombs us out */ | |
421 | } | |
422 | } | |
423 | else | |
424 | b->inserted = 1; | |
425 | } | |
426 | if (disabled_breaks) | |
427 | printf_filtered ("\n"); | |
428 | return val; | |
429 | } | |
430 | ||
431 | int | |
432 | remove_breakpoints () | |
433 | { | |
434 | register struct breakpoint *b; | |
435 | int val; | |
436 | ||
437 | #ifdef BREAKPOINT_DEBUG | |
438 | printf ("Removing breakpoints.\n"); | |
439 | #endif /* BREAKPOINT_DEBUG */ | |
440 | ||
441 | ALL_BREAKPOINTS (b) | |
442 | if (b->address != NULL && b->inserted) | |
443 | { | |
444 | val = target_remove_breakpoint(b->address, b->shadow_contents); | |
445 | if (val) | |
446 | return val; | |
447 | b->inserted = 0; | |
448 | #ifdef BREAKPOINT_DEBUG | |
449 | printf ("Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n", | |
450 | b->address, b->shadow_contents[0], b->shadow_contents[1]); | |
451 | #endif /* BREAKPOINT_DEBUG */ | |
452 | } | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | /* Clear the "inserted" flag in all breakpoints. | |
458 | This is done when the inferior is loaded. */ | |
459 | ||
460 | void | |
461 | mark_breakpoints_out () | |
462 | { | |
463 | register struct breakpoint *b; | |
464 | ||
465 | ALL_BREAKPOINTS (b) | |
466 | b->inserted = 0; | |
467 | } | |
468 | ||
469 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. | |
470 | When continuing from a location with a breakpoint, | |
471 | we actually single step once before calling insert_breakpoints. */ | |
472 | ||
473 | int | |
474 | breakpoint_here_p (pc) | |
475 | CORE_ADDR pc; | |
476 | { | |
477 | register struct breakpoint *b; | |
478 | ||
479 | ALL_BREAKPOINTS (b) | |
480 | if (b->enable != disabled && b->address == pc) | |
481 | return 1; | |
482 | ||
483 | return 0; | |
484 | } | |
485 | \f | |
486 | /* bpstat stuff. External routines' interfaces are documented | |
487 | in breakpoint.h. */ | |
488 | void | |
489 | bpstat_clear (bsp) | |
490 | bpstat *bsp; | |
491 | { | |
492 | bpstat p; | |
493 | bpstat q; | |
494 | ||
495 | if (bsp == 0) | |
496 | return; | |
497 | p = *bsp; | |
498 | while (p != NULL) | |
499 | { | |
500 | q = p->next; | |
501 | if (p->old_val != NULL) | |
502 | value_free (p->old_val); | |
503 | free (p); | |
504 | p = q; | |
505 | } | |
506 | *bsp = NULL; | |
507 | } | |
508 | ||
509 | bpstat | |
510 | bpstat_copy (bs) | |
511 | bpstat bs; | |
512 | { | |
513 | bpstat p = NULL; | |
514 | bpstat tmp; | |
515 | bpstat retval; | |
516 | ||
517 | if (bs == NULL) | |
518 | return bs; | |
519 | ||
520 | for (; bs != NULL; bs = bs->next) | |
521 | { | |
522 | tmp = (bpstat) xmalloc (sizeof (*tmp)); | |
523 | bcopy (bs, tmp, sizeof (*tmp)); | |
524 | if (p == NULL) | |
525 | /* This is the first thing in the chain. */ | |
526 | retval = tmp; | |
527 | else | |
528 | p->next = tmp; | |
529 | p = tmp; | |
530 | } | |
531 | p->next = NULL; | |
532 | return retval; | |
533 | } | |
534 | ||
535 | int | |
536 | bpstat_num (bsp) | |
537 | bpstat *bsp; | |
538 | { | |
539 | struct breakpoint *b; | |
540 | ||
541 | if ((*bsp) == NULL) | |
542 | return 0; /* No more breakpoint values */ | |
543 | else | |
544 | { | |
545 | b = (*bsp)->breakpoint_at; | |
546 | *bsp = (*bsp)->next; | |
547 | if (b == NULL) | |
548 | return -1; /* breakpoint that's been deleted since */ | |
549 | else | |
550 | return b->number; /* We have its number */ | |
551 | } | |
552 | } | |
553 | ||
554 | void | |
555 | bpstat_clear_actions (bs) | |
556 | bpstat bs; | |
557 | { | |
558 | for (; bs != NULL; bs = bs->next) | |
559 | { | |
560 | bs->commands = NULL; | |
561 | if (bs->old_val != NULL) | |
562 | { | |
563 | value_free (bs->old_val); | |
564 | bs->old_val = NULL; | |
565 | } | |
566 | } | |
567 | } | |
568 | ||
569 | /* Execute all the commands associated with all the breakpoints at this | |
570 | location. Any of these commands could cause the process to proceed | |
571 | beyond this point, etc. We look out for such changes by checking | |
572 | the global "breakpoint_proceeded" after each command. */ | |
573 | void | |
574 | bpstat_do_actions (bsp) | |
575 | bpstat *bsp; | |
576 | { | |
577 | bpstat bs; | |
578 | ||
579 | top: | |
580 | bs = *bsp; | |
581 | ||
582 | executing_breakpoint_commands = 1; | |
583 | breakpoint_proceeded = 0; | |
584 | for (; bs != NULL; bs = bs->next) | |
585 | { | |
586 | while (bs->commands) | |
587 | { | |
588 | char *line = bs->commands->line; | |
589 | bs->commands = bs->commands->next; | |
590 | execute_command (line, 0); | |
591 | /* If the inferior is proceeded by the command, bomb out now. | |
592 | The bpstat chain has been blown away by wait_for_inferior. | |
593 | But since execution has stopped again, there is a new bpstat | |
594 | to look at, so start over. */ | |
595 | if (breakpoint_proceeded) | |
596 | goto top; | |
597 | } | |
598 | } | |
599 | clear_momentary_breakpoints (); | |
600 | ||
601 | executing_breakpoint_commands = 0; | |
602 | } | |
603 | ||
604 | int | |
605 | bpstat_print (bs) | |
606 | bpstat bs; | |
607 | { | |
608 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint | |
609 | which has since been deleted. */ | |
610 | if (bs == NULL || bs->breakpoint_at == NULL) | |
611 | return 0; | |
612 | ||
613 | /* If bpstat_stop_status says don't print, OK, we won't. An example | |
614 | circumstance is when we single-stepped for both a watchpoint and | |
615 | for a "stepi" instruction. The bpstat says that the watchpoint | |
616 | explains the stop, but we shouldn't print because the watchpoint's | |
617 | value didn't change -- and the real reason we are stopping here | |
618 | rather than continuing to step (as the watchpoint would've had us do) | |
619 | is because of the "stepi". */ | |
620 | if (!bs->print) | |
621 | return 0; | |
622 | ||
623 | if (bs->breakpoint_at->address != NULL) | |
624 | { | |
625 | /* I think the user probably only wants to see one breakpoint | |
626 | number, not all of them. */ | |
627 | printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); | |
628 | return 0; | |
629 | } | |
630 | ||
631 | if (bs->old_val != NULL) | |
632 | { | |
633 | printf_filtered ("\nWatchpoint %d, ", bs->breakpoint_at->number); | |
634 | print_expression (bs->breakpoint_at->exp, stdout); | |
635 | printf_filtered ("\nOld value = "); | |
636 | value_print (bs->old_val, stdout, 0, Val_pretty_default); | |
637 | printf_filtered ("\nNew value = "); | |
638 | value_print (bs->breakpoint_at->val, stdout, 0, | |
639 | Val_pretty_default); | |
640 | printf_filtered ("\n"); | |
641 | value_free (bs->old_val); | |
642 | bs->old_val = NULL; | |
643 | return 1; | |
644 | } | |
645 | ||
646 | fprintf_filtered (stderr, "gdb internal error: in bpstat_print\n"); | |
647 | return 0; | |
648 | } | |
649 | ||
650 | /* Evaluate the expression EXP and return 1 if value is zero. | |
651 | This is used inside a catch_errors to evaluate the breakpoint condition. | |
652 | The argument is a "struct expression *" that has been cast to int to | |
653 | make it pass through catch_errors. */ | |
654 | ||
655 | static int | |
656 | breakpoint_cond_eval (exp) | |
657 | int exp; | |
658 | { | |
659 | return value_zerop (evaluate_expression ((struct expression *)exp)); | |
660 | } | |
661 | ||
662 | /* Allocate a new bpstat and chain it to the current one. */ | |
663 | ||
664 | static bpstat | |
665 | bpstat_alloc (b, cbs) | |
666 | register struct breakpoint *b; | |
667 | bpstat cbs; /* Current "bs" value */ | |
668 | { | |
669 | bpstat bs; | |
670 | ||
671 | bs = (bpstat) xmalloc (sizeof (*bs)); | |
672 | cbs->next = bs; | |
673 | bs->breakpoint_at = b; | |
674 | /* If the condition is false, etc., don't do the commands. */ | |
675 | bs->commands = NULL; | |
676 | bs->momentary = b->number == -3; | |
677 | bs->old_val = NULL; | |
678 | return bs; | |
679 | } | |
680 | ||
681 | /* Determine whether we stopped at a breakpoint, etc, or whether we | |
682 | don't understand this stop. Result is a chain of bpstat's such that: | |
683 | ||
684 | if we don't understand the stop, the result is a null pointer. | |
685 | ||
686 | if we understand why we stopped, the result is not null, and | |
687 | the first element of the chain contains summary "stop" and | |
688 | "print" flags for the whole chain. | |
689 | ||
690 | Each element of the chain refers to a particular breakpoint or | |
691 | watchpoint at which we have stopped. (We may have stopped for | |
692 | several reasons.) | |
693 | ||
694 | Each element of the chain has valid next, breakpoint_at, | |
695 | commands, FIXME??? fields. | |
696 | ||
697 | */ | |
698 | ||
699 | ||
700 | bpstat | |
701 | bpstat_stop_status (pc, frame_address) | |
702 | CORE_ADDR *pc; | |
703 | FRAME_ADDR frame_address; | |
704 | { | |
705 | register struct breakpoint *b; | |
706 | int stop = 0; | |
707 | int print = 0; | |
708 | CORE_ADDR bp_addr; | |
709 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ | |
710 | int real_breakpoint = 0; | |
711 | /* Root of the chain of bpstat's */ | |
712 | struct bpstat__struct root_bs[1]; | |
713 | /* Pointer to the last thing in the chain currently. */ | |
714 | bpstat bs = root_bs; | |
715 | ||
716 | /* Get the address where the breakpoint would have been. */ | |
717 | bp_addr = *pc - DECR_PC_AFTER_BREAK; | |
718 | ||
719 | ALL_BREAKPOINTS (b) | |
720 | { | |
721 | int this_bp_stop; | |
722 | int this_bp_print; | |
723 | ||
724 | if (b->enable == disabled) | |
725 | continue; | |
726 | if (b->address != NULL && b->address != bp_addr) | |
727 | continue; | |
728 | ||
729 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ | |
730 | ||
731 | this_bp_stop = 1; | |
732 | this_bp_print = 1; | |
733 | ||
734 | if (b->exp != NULL) /* Watchpoint */ | |
735 | { | |
736 | int within_current_scope; | |
737 | if (b->exp_valid_block != NULL) | |
738 | within_current_scope = | |
739 | contained_in (get_selected_block (), b->exp_valid_block); | |
740 | else | |
741 | within_current_scope = 1; | |
742 | ||
743 | if (within_current_scope) | |
744 | { | |
745 | value new_val = evaluate_expression (b->exp); | |
746 | release_value (new_val); | |
747 | if (!value_equal (b->val, new_val)) | |
748 | { | |
749 | bs->old_val = b->val; | |
750 | b->val = new_val; | |
751 | /* We will stop here */ | |
752 | } | |
753 | else | |
754 | { | |
755 | /* Nothing changed, don't do anything. */ | |
756 | value_free (new_val); | |
757 | continue; | |
758 | /* We won't stop here */ | |
759 | } | |
760 | } | |
761 | else | |
762 | { | |
763 | /* This seems like the only logical thing to do because | |
764 | if we temporarily ignored the watchpoint, then when | |
765 | we reenter the block in which it is valid it contains | |
766 | garbage (in the case of a function, it may have two | |
767 | garbage values, one before and one after the prologue). | |
768 | So we can't even detect the first assignment to it and | |
769 | watch after that (since the garbage may or may not equal | |
770 | the first value assigned). */ | |
771 | b->enable = disabled; | |
772 | printf_filtered ("\ | |
773 | Watchpoint %d disabled because the program has left the block in\n\ | |
774 | which its expression is valid.\n", b->number); | |
775 | /* We won't stop here */ | |
776 | /* FIXME, maybe we should stop here!!! */ | |
777 | continue; | |
778 | } | |
779 | } | |
780 | else | |
781 | real_breakpoint = 1; | |
782 | ||
783 | if (b->frame && b->frame != frame_address) | |
784 | this_bp_stop = 0; | |
785 | else | |
786 | { | |
787 | int value_zero; | |
788 | ||
789 | if (b->cond) | |
790 | { | |
791 | /* Need to select the frame, with all that implies | |
792 | so that the conditions will have the right context. */ | |
793 | select_frame (get_current_frame (), 0); | |
794 | value_zero | |
795 | = catch_errors (breakpoint_cond_eval, (int)(b->cond), | |
796 | "Error occurred in testing breakpoint condition."); | |
797 | free_all_values (); | |
798 | } | |
799 | if (b->cond && value_zero) | |
800 | { | |
801 | this_bp_stop = 0; | |
802 | } | |
803 | else if (b->ignore_count > 0) | |
804 | { | |
805 | b->ignore_count--; | |
806 | this_bp_stop = 0; | |
807 | } | |
808 | else | |
809 | { | |
810 | /* We will stop here */ | |
811 | if (b->enable == temporary) | |
812 | b->enable = disabled; | |
813 | bs->commands = b->commands; | |
814 | if (b->silent) | |
815 | this_bp_print = 0; | |
816 | if (bs->commands && !strcmp ("silent", bs->commands->line)) | |
817 | { | |
818 | bs->commands = bs->commands->next; | |
819 | this_bp_print = 0; | |
820 | } | |
821 | } | |
822 | } | |
823 | if (this_bp_stop) | |
824 | stop = 1; | |
825 | if (this_bp_print) | |
826 | print = 1; | |
827 | } | |
828 | ||
829 | bs->next = NULL; /* Terminate the chain */ | |
830 | bs = root_bs->next; /* Re-grab the head of the chain */ | |
831 | if (bs) | |
832 | { | |
833 | bs->stop = stop; | |
834 | bs->print = print; | |
835 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) | |
836 | if (real_breakpoint) | |
837 | { | |
838 | *pc = bp_addr; | |
839 | #if defined (SHIFT_INST_REGS) | |
840 | { | |
841 | CORE_ADDR pc = read_register (PC_REGNUM); | |
842 | CORE_ADDR npc = read_register (NPC_REGNUM); | |
843 | if (pc != npc) | |
844 | { | |
845 | write_register (NNPC_REGNUM, npc); | |
846 | write_register (NPC_REGNUM, pc); | |
847 | } | |
848 | } | |
849 | #else /* No SHIFT_INST_REGS. */ | |
850 | write_pc (bp_addr); | |
851 | #endif /* No SHIFT_INST_REGS. */ | |
852 | } | |
853 | #endif /* DECR_PC_AFTER_BREAK != 0. */ | |
854 | } | |
855 | return bs; | |
856 | } | |
857 | ||
858 | int | |
859 | bpstat_should_step () | |
860 | { | |
861 | struct breakpoint *b; | |
862 | ALL_BREAKPOINTS (b) | |
863 | if (b->enable != disabled && b->exp != NULL) | |
864 | return 1; | |
865 | return 0; | |
866 | } | |
867 | \f | |
868 | /* Print information on breakpoint number BNUM, or -1 if all. | |
869 | If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS | |
870 | is nonzero, process only watchpoints. */ | |
871 | ||
872 | static void | |
873 | breakpoint_1 (bnum, watchpoints) | |
874 | int bnum; | |
875 | int watchpoints; | |
876 | { | |
877 | register struct breakpoint *b; | |
878 | register struct command_line *l; | |
879 | register struct symbol *sym; | |
880 | CORE_ADDR last_addr = (CORE_ADDR)-1; | |
881 | int header_printed = 0; | |
882 | ||
883 | ALL_BREAKPOINTS (b) | |
884 | if (bnum == -1 || bnum == b->number) | |
885 | { | |
886 | if (b->address == NULL && !watchpoints) | |
887 | { | |
888 | if (bnum == -1) | |
889 | continue; | |
890 | error ("That is a watchpoint, not a breakpoint."); | |
891 | } | |
892 | if (b->address != NULL && watchpoints) | |
893 | { | |
894 | if (bnum == -1) | |
895 | continue; | |
896 | error ("That is a breakpoint, not a watchpoint."); | |
897 | } | |
898 | ||
899 | if (!header_printed) | |
900 | { | |
901 | if (watchpoints) | |
902 | printf_filtered (" Enb Expression\n"); | |
903 | else if (addressprint) | |
904 | printf_filtered (" Enb Address Where\n"); | |
905 | else | |
906 | printf_filtered (" Enb Where\n"); | |
907 | header_printed = 1; | |
908 | } | |
909 | ||
910 | printf_filtered ("#%-3d %c ", b->number, "nyod"[(int) b->enable]); | |
f266e564 JK |
911 | if (b->address == NULL) { |
912 | printf_filtered (" "); | |
bd5635a1 | 913 | print_expression (b->exp, stdout); |
f266e564 | 914 | } else { |
bd5635a1 RP |
915 | if (addressprint) |
916 | printf_filtered (" 0x%08x ", b->address); | |
917 | ||
918 | last_addr = b->address; | |
919 | if (b->symtab) | |
920 | { | |
921 | sym = find_pc_function (b->address); | |
922 | if (sym) | |
923 | { | |
924 | fputs_filtered (" in ", stdout); | |
925 | fputs_demangled (SYMBOL_NAME (sym), stdout, 1); | |
926 | fputs_filtered (" at ", stdout); | |
927 | } | |
928 | fputs_filtered (b->symtab->filename, stdout); | |
929 | printf_filtered (":%d", b->line_number); | |
930 | } | |
931 | else | |
932 | print_address_symbolic (b->address, stdout, demangle); | |
933 | } | |
934 | ||
935 | printf_filtered ("\n"); | |
936 | ||
937 | if (b->frame) | |
938 | printf_filtered ("\tstop only in stack frame at 0x%x\n", b->frame); | |
939 | if (b->cond) | |
940 | { | |
941 | printf_filtered ("\tstop only if "); | |
942 | print_expression (b->cond, stdout); | |
943 | printf_filtered ("\n"); | |
944 | } | |
945 | if (b->ignore_count) | |
946 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); | |
947 | if ((l = b->commands)) | |
948 | while (l) | |
949 | { | |
950 | fputs_filtered ("\t", stdout); | |
951 | fputs_filtered (l->line, stdout); | |
952 | fputs_filtered ("\n", stdout); | |
953 | l = l->next; | |
954 | } | |
955 | } | |
956 | ||
957 | if (!header_printed) | |
958 | { | |
959 | char *which = watchpoints ? "watch" : "break"; | |
960 | if (bnum == -1) | |
961 | printf_filtered ("No %spoints.\n", which); | |
962 | else | |
963 | printf_filtered ("No %spoint numbered %d.\n", which, bnum); | |
964 | } | |
965 | ||
966 | /* Compare against (CORE_ADDR)-1 in case some compiler decides | |
967 | that a comparison of an unsigned with -1 is always false. */ | |
968 | if (last_addr != (CORE_ADDR)-1) | |
969 | set_next_address (last_addr); | |
970 | } | |
971 | ||
972 | static void | |
973 | breakpoints_info (bnum_exp, from_tty) | |
974 | char *bnum_exp; | |
975 | int from_tty; | |
976 | { | |
977 | int bnum = -1; | |
978 | ||
979 | if (bnum_exp) | |
980 | bnum = parse_and_eval_address (bnum_exp); | |
981 | ||
982 | breakpoint_1 (bnum, 0); | |
983 | } | |
984 | ||
985 | static void | |
986 | watchpoints_info (bnum_exp, from_tty) | |
987 | char *bnum_exp; | |
988 | int from_tty; | |
989 | { | |
990 | int bnum = -1; | |
991 | ||
992 | if (bnum_exp) | |
993 | bnum = parse_and_eval_address (bnum_exp); | |
994 | ||
995 | breakpoint_1 (bnum, 1); | |
996 | } | |
997 | ||
998 | /* Print a message describing any breakpoints set at PC. */ | |
999 | ||
1000 | static void | |
1001 | describe_other_breakpoints (pc) | |
1002 | register CORE_ADDR pc; | |
1003 | { | |
1004 | register int others = 0; | |
1005 | register struct breakpoint *b; | |
1006 | ||
1007 | ALL_BREAKPOINTS (b) | |
1008 | if (b->address == pc) | |
1009 | others++; | |
1010 | if (others > 0) | |
1011 | { | |
1012 | printf ("Note: breakpoint%s ", (others > 1) ? "s" : ""); | |
1013 | ALL_BREAKPOINTS (b) | |
1014 | if (b->address == pc) | |
1015 | { | |
1016 | others--; | |
1017 | printf ("%d%s%s ", | |
1018 | b->number, | |
1019 | (b->enable == disabled) ? " (disabled)" : "", | |
1020 | (others > 1) ? "," : ((others == 1) ? " and" : "")); | |
1021 | } | |
1022 | printf ("also set at pc 0x%x.\n", pc); | |
1023 | } | |
1024 | } | |
1025 | \f | |
1026 | /* Set the default place to put a breakpoint | |
1027 | for the `break' command with no arguments. */ | |
1028 | ||
1029 | void | |
1030 | set_default_breakpoint (valid, addr, symtab, line) | |
1031 | int valid; | |
1032 | CORE_ADDR addr; | |
1033 | struct symtab *symtab; | |
1034 | int line; | |
1035 | { | |
1036 | default_breakpoint_valid = valid; | |
1037 | default_breakpoint_address = addr; | |
1038 | default_breakpoint_symtab = symtab; | |
1039 | default_breakpoint_line = line; | |
1040 | } | |
1041 | ||
1042 | /* Rescan breakpoints at address ADDRESS, | |
1043 | marking the first one as "first" and any others as "duplicates". | |
1044 | This is so that the bpt instruction is only inserted once. */ | |
1045 | ||
1046 | static void | |
1047 | check_duplicates (address) | |
1048 | CORE_ADDR address; | |
1049 | { | |
1050 | register struct breakpoint *b; | |
1051 | register int count = 0; | |
1052 | ||
f266e564 JK |
1053 | if (address == NULL) /* Watchpoints are uninteresting */ |
1054 | return; | |
1055 | ||
bd5635a1 RP |
1056 | ALL_BREAKPOINTS (b) |
1057 | if (b->enable != disabled && b->address == address) | |
1058 | { | |
1059 | count++; | |
1060 | b->duplicate = count > 1; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | /* Low level routine to set a breakpoint. | |
1065 | Takes as args the three things that every breakpoint must have. | |
1066 | Returns the breakpoint object so caller can set other things. | |
1067 | Does not set the breakpoint number! | |
f266e564 JK |
1068 | Does not print anything. |
1069 | ||
1070 | ==> This routine should not be called if there is a chance of later | |
1071 | error(); otherwise it leaves a bogus breakpoint on the chain. Validate | |
1072 | your arguments BEFORE calling this routine! */ | |
bd5635a1 RP |
1073 | |
1074 | static struct breakpoint * | |
1075 | set_raw_breakpoint (sal) | |
1076 | struct symtab_and_line sal; | |
1077 | { | |
1078 | register struct breakpoint *b, *b1; | |
1079 | ||
1080 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); | |
1081 | bzero (b, sizeof *b); | |
1082 | b->address = sal.pc; | |
1083 | b->symtab = sal.symtab; | |
1084 | b->line_number = sal.line; | |
1085 | b->enable = enabled; | |
1086 | b->next = 0; | |
1087 | b->silent = 0; | |
1088 | b->ignore_count = 0; | |
1089 | b->commands = NULL; | |
1090 | b->frame = NULL; | |
1091 | ||
1092 | /* Add this breakpoint to the end of the chain | |
1093 | so that a list of breakpoints will come out in order | |
1094 | of increasing numbers. */ | |
1095 | ||
1096 | b1 = breakpoint_chain; | |
1097 | if (b1 == 0) | |
1098 | breakpoint_chain = b; | |
1099 | else | |
1100 | { | |
1101 | while (b1->next) | |
1102 | b1 = b1->next; | |
1103 | b1->next = b; | |
1104 | } | |
1105 | ||
1106 | check_duplicates (sal.pc); | |
1107 | ||
1108 | return b; | |
1109 | } | |
1110 | ||
1111 | /* Set a breakpoint that will evaporate an end of command | |
1112 | at address specified by SAL. | |
1113 | Restrict it to frame FRAME if FRAME is nonzero. */ | |
1114 | ||
1115 | void | |
1116 | set_momentary_breakpoint (sal, frame) | |
1117 | struct symtab_and_line sal; | |
1118 | FRAME frame; | |
1119 | { | |
1120 | register struct breakpoint *b; | |
1121 | b = set_raw_breakpoint (sal); | |
1122 | b->number = -3; | |
1123 | b->enable = delete; | |
1124 | b->frame = (frame ? FRAME_FP (frame) : 0); | |
1125 | } | |
1126 | ||
1127 | void | |
1128 | clear_momentary_breakpoints () | |
1129 | { | |
1130 | register struct breakpoint *b; | |
1131 | ALL_BREAKPOINTS (b) | |
1132 | if (b->number == -3) | |
1133 | { | |
1134 | delete_breakpoint (b); | |
1135 | break; | |
1136 | } | |
1137 | } | |
1138 | \f | |
1139 | /* Tell the user we have just set a breakpoint B. */ | |
1140 | static void | |
1141 | mention (b) | |
1142 | struct breakpoint *b; | |
1143 | { | |
1144 | if (b->exp) | |
1145 | { | |
1146 | printf_filtered ("Watchpoint %d: ", b->number); | |
1147 | print_expression (b->exp, stdout); | |
1148 | } | |
1149 | else | |
1150 | { | |
1151 | printf_filtered ("Breakpoint %d at 0x%x", b->number, b->address); | |
1152 | if (b->symtab) | |
1153 | printf_filtered (": file %s, line %d.", | |
1154 | b->symtab->filename, b->line_number); | |
1155 | } | |
1156 | printf_filtered ("\n"); | |
1157 | } | |
1158 | ||
1159 | #if 0 | |
1160 | /* Nobody calls this currently. */ | |
1161 | /* Set a breakpoint from a symtab and line. | |
1162 | If TEMPFLAG is nonzero, it is a temporary breakpoint. | |
1163 | ADDR_STRING is a malloc'd string holding the name of where we are | |
1164 | setting the breakpoint. This is used later to re-set it after the | |
1165 | program is relinked and symbols are reloaded. | |
1166 | Print the same confirmation messages that the breakpoint command prints. */ | |
1167 | ||
1168 | void | |
1169 | set_breakpoint (s, line, tempflag, addr_string) | |
1170 | struct symtab *s; | |
1171 | int line; | |
1172 | int tempflag; | |
1173 | char *addr_string; | |
1174 | { | |
1175 | register struct breakpoint *b; | |
1176 | struct symtab_and_line sal; | |
1177 | ||
1178 | sal.symtab = s; | |
1179 | sal.line = line; | |
1180 | sal.pc = find_line_pc (sal.symtab, sal.line); | |
1181 | if (sal.pc == 0) | |
1182 | error ("No line %d in file \"%s\".\n", sal.line, sal.symtab->filename); | |
1183 | else | |
1184 | { | |
1185 | describe_other_breakpoints (sal.pc); | |
1186 | ||
1187 | b = set_raw_breakpoint (sal); | |
1188 | set_breakpoint_count (breakpoint_count + 1); | |
1189 | b->number = breakpoint_count; | |
1190 | b->cond = 0; | |
1191 | b->addr_string = addr_string; | |
1192 | if (tempflag) | |
1193 | b->enable = temporary; | |
1194 | ||
1195 | mention (b); | |
1196 | } | |
1197 | } | |
1198 | #endif | |
1199 | \f | |
1200 | /* Set a breakpoint according to ARG (function, linenum or *address) | |
1201 | and make it temporary if TEMPFLAG is nonzero. */ | |
1202 | ||
1203 | static void | |
1204 | break_command_1 (arg, tempflag, from_tty) | |
1205 | char *arg; | |
1206 | int tempflag, from_tty; | |
1207 | { | |
1208 | struct symtabs_and_lines sals; | |
1209 | struct symtab_and_line sal; | |
1210 | register struct expression *cond = 0; | |
1211 | register struct breakpoint *b; | |
1212 | ||
1213 | /* Pointers in arg to the start, and one past the end, of the condition. */ | |
1214 | char *cond_start = NULL; | |
1215 | char *cond_end; | |
1216 | /* Pointers in arg to the start, and one past the end, | |
1217 | of the address part. */ | |
1218 | char *addr_start = NULL; | |
1219 | char *addr_end; | |
1220 | ||
1221 | int i; | |
1222 | CORE_ADDR pc; | |
1223 | ||
1224 | sals.sals = NULL; | |
1225 | sals.nelts = 0; | |
1226 | ||
1227 | sal.line = sal.pc = sal.end = 0; | |
1228 | sal.symtab = 0; | |
1229 | ||
1230 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ | |
1231 | ||
1232 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
1233 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
1234 | { | |
1235 | if (default_breakpoint_valid) | |
1236 | { | |
1237 | sals.sals = (struct symtab_and_line *) | |
1238 | xmalloc (sizeof (struct symtab_and_line)); | |
1239 | sal.pc = default_breakpoint_address; | |
1240 | sal.line = default_breakpoint_line; | |
1241 | sal.symtab = default_breakpoint_symtab; | |
1242 | sals.sals[0] = sal; | |
1243 | sals.nelts = 1; | |
1244 | } | |
1245 | else | |
1246 | error ("No default breakpoint address now."); | |
1247 | } | |
1248 | else | |
1249 | { | |
1250 | addr_start = arg; | |
1251 | ||
1252 | /* Force almost all breakpoints to be in terms of the | |
1253 | current_source_symtab (which is decode_line_1's default). This | |
1254 | should produce the results we want almost all of the time while | |
1255 | leaving default_breakpoint_* alone. */ | |
1256 | if (default_breakpoint_valid | |
1257 | && (!current_source_symtab | |
1258 | || (arg && (*arg == '+' || *arg == '-')))) | |
1259 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
1260 | default_breakpoint_line); | |
1261 | else | |
1262 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0); | |
1263 | ||
1264 | addr_end = arg; | |
1265 | } | |
1266 | ||
1267 | if (! sals.nelts) | |
1268 | return; | |
1269 | ||
1270 | for (i = 0; i < sals.nelts; i++) | |
1271 | { | |
1272 | sal = sals.sals[i]; | |
1273 | if (sal.pc == 0 && sal.symtab != 0) | |
1274 | { | |
1275 | pc = find_line_pc (sal.symtab, sal.line); | |
1276 | if (pc == 0) | |
1277 | error ("No line %d in file \"%s\".", | |
1278 | sal.line, sal.symtab->filename); | |
1279 | } | |
1280 | else | |
1281 | pc = sal.pc; | |
1282 | ||
1283 | while (arg && *arg) | |
1284 | { | |
1285 | if (arg[0] == 'i' && arg[1] == 'f' | |
1286 | && (arg[2] == ' ' || arg[2] == '\t')) | |
1287 | { | |
1288 | arg += 2; | |
1289 | cond_start = arg; | |
1290 | cond = parse_c_1 (&arg, block_for_pc (pc), 0); | |
1291 | cond_end = arg; | |
1292 | } | |
1293 | else | |
1294 | error ("Junk at end of arguments."); | |
1295 | } | |
1296 | sals.sals[i].pc = pc; | |
1297 | } | |
1298 | ||
1299 | for (i = 0; i < sals.nelts; i++) | |
1300 | { | |
1301 | sal = sals.sals[i]; | |
1302 | ||
1303 | if (from_tty) | |
1304 | describe_other_breakpoints (sal.pc); | |
1305 | ||
1306 | b = set_raw_breakpoint (sal); | |
1307 | set_breakpoint_count (breakpoint_count + 1); | |
1308 | b->number = breakpoint_count; | |
1309 | b->cond = cond; | |
1310 | ||
1311 | if (addr_start) | |
1312 | b->addr_string = savestring (addr_start, addr_end - addr_start); | |
1313 | if (cond_start) | |
1314 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |
1315 | ||
1316 | if (tempflag) | |
1317 | b->enable = temporary; | |
1318 | ||
1319 | mention (b); | |
1320 | } | |
1321 | ||
1322 | if (sals.nelts > 1) | |
1323 | { | |
1324 | printf ("Multiple breakpoints were set.\n"); | |
1325 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
1326 | } | |
1327 | free (sals.sals); | |
1328 | } | |
1329 | ||
1330 | void | |
1331 | break_command (arg, from_tty) | |
1332 | char *arg; | |
1333 | int from_tty; | |
1334 | { | |
1335 | break_command_1 (arg, 0, from_tty); | |
1336 | } | |
1337 | ||
1338 | static void | |
1339 | tbreak_command (arg, from_tty) | |
1340 | char *arg; | |
1341 | int from_tty; | |
1342 | { | |
1343 | break_command_1 (arg, 1, from_tty); | |
1344 | } | |
1345 | ||
1346 | static void | |
1347 | watch_command (arg, from_tty) | |
1348 | char *arg; | |
1349 | int from_tty; | |
1350 | { | |
1351 | struct breakpoint *b; | |
1352 | struct symtab_and_line sal; | |
f266e564 JK |
1353 | struct expression *exp; |
1354 | struct block *exp_valid_block; | |
1355 | struct value *val; | |
bd5635a1 RP |
1356 | |
1357 | sal.pc = NULL; | |
1358 | sal.symtab = NULL; | |
1359 | sal.line = 0; | |
1360 | ||
f266e564 JK |
1361 | /* Parse arguments. */ |
1362 | innermost_block = NULL; | |
1363 | exp = parse_c_expression (arg); | |
1364 | exp_valid_block = innermost_block; | |
1365 | val = evaluate_expression (exp); | |
1366 | release_value (val); | |
1367 | ||
1368 | /* Now set up the breakpoint. */ | |
bd5635a1 RP |
1369 | b = set_raw_breakpoint (sal); |
1370 | set_breakpoint_count (breakpoint_count + 1); | |
1371 | b->number = breakpoint_count; | |
f266e564 JK |
1372 | b->exp = exp; |
1373 | b->exp_valid_block = exp_valid_block; | |
1374 | b->val = val; | |
bd5635a1 RP |
1375 | b->cond = 0; |
1376 | b->cond_string = NULL; | |
1377 | mention (b); | |
1378 | } | |
1379 | \f | |
1380 | /* | |
1381 | * Helper routine for the until_command routine in infcmd.c. Here | |
1382 | * because it uses the mechanisms of breakpoints. | |
1383 | */ | |
1384 | void | |
1385 | until_break_command (arg, from_tty) | |
1386 | char *arg; | |
1387 | int from_tty; | |
1388 | { | |
1389 | struct symtabs_and_lines sals; | |
1390 | struct symtab_and_line sal; | |
1391 | FRAME prev_frame = get_prev_frame (selected_frame); | |
1392 | ||
1393 | clear_proceed_status (); | |
1394 | ||
1395 | /* Set a breakpoint where the user wants it and at return from | |
1396 | this function */ | |
1397 | ||
1398 | if (default_breakpoint_valid) | |
1399 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
1400 | default_breakpoint_line); | |
1401 | else | |
1402 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0); | |
1403 | ||
1404 | if (sals.nelts != 1) | |
1405 | error ("Couldn't get information on specified line."); | |
1406 | ||
1407 | sal = sals.sals[0]; | |
1408 | free (sals.sals); /* malloc'd, so freed */ | |
1409 | ||
1410 | if (*arg) | |
1411 | error ("Junk at end of arguments."); | |
1412 | ||
1413 | if (sal.pc == 0 && sal.symtab != 0) | |
1414 | sal.pc = find_line_pc (sal.symtab, sal.line); | |
1415 | ||
1416 | if (sal.pc == 0) | |
1417 | error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename); | |
1418 | ||
1419 | set_momentary_breakpoint (sal, selected_frame); | |
1420 | ||
1421 | /* Keep within the current frame */ | |
1422 | ||
1423 | if (prev_frame) | |
1424 | { | |
1425 | struct frame_info *fi; | |
1426 | ||
1427 | fi = get_frame_info (prev_frame); | |
1428 | sal = find_pc_line (fi->pc, 0); | |
1429 | sal.pc = fi->pc; | |
1430 | set_momentary_breakpoint (sal, prev_frame); | |
1431 | } | |
1432 | ||
1433 | proceed (-1, -1, 0); | |
1434 | } | |
1435 | \f | |
1436 | /* Set a breakpoint at the catch clause for NAME. */ | |
1437 | static int | |
1438 | catch_breakpoint (name) | |
1439 | char *name; | |
1440 | { | |
1441 | } | |
1442 | ||
1443 | static int | |
1444 | disable_catch_breakpoint () | |
1445 | { | |
1446 | } | |
1447 | ||
1448 | static int | |
1449 | delete_catch_breakpoint () | |
1450 | { | |
1451 | } | |
1452 | ||
1453 | static int | |
1454 | enable_catch_breakpoint () | |
1455 | { | |
1456 | } | |
1457 | ||
1458 | struct sal_chain | |
1459 | { | |
1460 | struct sal_chain *next; | |
1461 | struct symtab_and_line sal; | |
1462 | }; | |
1463 | ||
1464 | /* For each catch clause identified in ARGS, run FUNCTION | |
1465 | with that clause as an argument. */ | |
1466 | static struct symtabs_and_lines | |
1467 | map_catch_names (args, function) | |
1468 | char *args; | |
1469 | int (*function)(); | |
1470 | { | |
1471 | register char *p = args; | |
1472 | register char *p1; | |
1473 | struct symtabs_and_lines sals; | |
1474 | struct sal_chain *sal_chain = 0; | |
1475 | ||
1476 | if (p == 0) | |
1477 | error_no_arg ("one or more catch names"); | |
1478 | ||
1479 | sals.nelts = 0; | |
1480 | sals.sals = NULL; | |
1481 | ||
1482 | while (*p) | |
1483 | { | |
1484 | p1 = p; | |
1485 | /* Don't swallow conditional part. */ | |
1486 | if (p1[0] == 'i' && p1[1] == 'f' | |
1487 | && (p1[2] == ' ' || p1[2] == '\t')) | |
1488 | break; | |
1489 | ||
1490 | if (isalpha (*p1)) | |
1491 | { | |
1492 | p1++; | |
1493 | while (isalnum (*p1) || *p1 == '_' || *p1 == '$') | |
1494 | p1++; | |
1495 | } | |
1496 | ||
1497 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
1498 | error ("Arguments must be catch names."); | |
1499 | ||
1500 | *p1 = 0; | |
1501 | #if 0 | |
1502 | if (function (p)) | |
1503 | { | |
1504 | struct sal_chain *next | |
1505 | = (struct sal_chain *)alloca (sizeof (struct sal_chain)); | |
1506 | next->next = sal_chain; | |
1507 | next->sal = get_catch_sal (p); | |
1508 | sal_chain = next; | |
1509 | goto win; | |
1510 | } | |
1511 | #endif | |
1512 | printf ("No catch clause for exception %s.\n", p); | |
1513 | win: | |
1514 | p = p1; | |
1515 | while (*p == ' ' || *p == '\t') p++; | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ | |
1520 | ||
1521 | static struct symtabs_and_lines | |
1522 | get_catch_sals (this_level_only) | |
1523 | int this_level_only; | |
1524 | { | |
1525 | extern struct blockvector *blockvector_for_pc (); | |
1526 | register struct blockvector *bl; | |
1527 | register struct block *block = get_frame_block (selected_frame); | |
1528 | int index, have_default = 0; | |
1529 | struct frame_info *fi = get_frame_info (selected_frame); | |
1530 | CORE_ADDR pc = fi->pc; | |
1531 | struct symtabs_and_lines sals; | |
1532 | struct sal_chain *sal_chain = 0; | |
1533 | char *blocks_searched; | |
1534 | ||
1535 | sals.nelts = 0; | |
1536 | sals.sals = NULL; | |
1537 | ||
1538 | if (block == 0) | |
1539 | error ("No symbol table info available.\n"); | |
1540 | ||
1541 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); | |
1542 | blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
1543 | bzero (blocks_searched, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
1544 | ||
1545 | while (block != 0) | |
1546 | { | |
1547 | CORE_ADDR end = BLOCK_END (block) - 4; | |
1548 | int last_index; | |
1549 | ||
1550 | if (bl != blockvector_for_pc (end, &index)) | |
1551 | error ("blockvector blotch"); | |
1552 | if (BLOCKVECTOR_BLOCK (bl, index) != block) | |
1553 | error ("blockvector botch"); | |
1554 | last_index = BLOCKVECTOR_NBLOCKS (bl); | |
1555 | index += 1; | |
1556 | ||
1557 | /* Don't print out blocks that have gone by. */ | |
1558 | while (index < last_index | |
1559 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) | |
1560 | index++; | |
1561 | ||
1562 | while (index < last_index | |
1563 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) | |
1564 | { | |
1565 | if (blocks_searched[index] == 0) | |
1566 | { | |
1567 | struct block *b = BLOCKVECTOR_BLOCK (bl, index); | |
1568 | int nsyms; | |
1569 | register int i; | |
1570 | register struct symbol *sym; | |
1571 | ||
1572 | nsyms = BLOCK_NSYMS (b); | |
1573 | ||
1574 | for (i = 0; i < nsyms; i++) | |
1575 | { | |
1576 | sym = BLOCK_SYM (b, i); | |
1577 | if (! strcmp (SYMBOL_NAME (sym), "default")) | |
1578 | { | |
1579 | if (have_default) | |
1580 | continue; | |
1581 | have_default = 1; | |
1582 | } | |
1583 | if (SYMBOL_CLASS (sym) == LOC_LABEL) | |
1584 | { | |
1585 | struct sal_chain *next = (struct sal_chain *) | |
1586 | alloca (sizeof (struct sal_chain)); | |
1587 | next->next = sal_chain; | |
1588 | next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); | |
1589 | sal_chain = next; | |
1590 | } | |
1591 | } | |
1592 | blocks_searched[index] = 1; | |
1593 | } | |
1594 | index++; | |
1595 | } | |
1596 | if (have_default) | |
1597 | break; | |
1598 | if (sal_chain && this_level_only) | |
1599 | break; | |
1600 | ||
1601 | /* After handling the function's top-level block, stop. | |
1602 | Don't continue to its superblock, the block of | |
1603 | per-file symbols. */ | |
1604 | if (BLOCK_FUNCTION (block)) | |
1605 | break; | |
1606 | block = BLOCK_SUPERBLOCK (block); | |
1607 | } | |
1608 | ||
1609 | if (sal_chain) | |
1610 | { | |
1611 | struct sal_chain *tmp_chain; | |
1612 | ||
1613 | /* Count the number of entries. */ | |
1614 | for (index = 0, tmp_chain = sal_chain; tmp_chain; | |
1615 | tmp_chain = tmp_chain->next) | |
1616 | index++; | |
1617 | ||
1618 | sals.nelts = index; | |
1619 | sals.sals = (struct symtab_and_line *) | |
1620 | xmalloc (index * sizeof (struct symtab_and_line)); | |
1621 | for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) | |
1622 | sals.sals[index] = sal_chain->sal; | |
1623 | } | |
1624 | ||
1625 | return sals; | |
1626 | } | |
1627 | ||
1628 | /* Commands to deal with catching exceptions. */ | |
1629 | ||
1630 | void | |
1631 | catch_command_1 (arg, tempflag, from_tty) | |
1632 | char *arg; | |
1633 | int tempflag; | |
1634 | int from_tty; | |
1635 | { | |
1636 | /* First, translate ARG into something we can deal with in terms | |
1637 | of breakpoints. */ | |
1638 | ||
1639 | struct symtabs_and_lines sals; | |
1640 | struct symtab_and_line sal; | |
1641 | register struct expression *cond = 0; | |
1642 | register struct breakpoint *b; | |
1643 | char *save_arg; | |
1644 | int i; | |
1645 | CORE_ADDR pc; | |
1646 | ||
1647 | sal.line = sal.pc = sal.end = 0; | |
1648 | sal.symtab = 0; | |
1649 | ||
1650 | /* If no arg given, or if first arg is 'if ', all active catch clauses | |
1651 | are breakpointed. */ | |
1652 | ||
1653 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
1654 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
1655 | { | |
1656 | /* Grab all active catch clauses. */ | |
1657 | sals = get_catch_sals (0); | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | /* Grab selected catch clauses. */ | |
1662 | error ("catch NAME not implemeneted"); | |
1663 | sals = map_catch_names (arg, catch_breakpoint); | |
1664 | } | |
1665 | ||
1666 | if (! sals.nelts) | |
1667 | return; | |
1668 | ||
1669 | save_arg = arg; | |
1670 | for (i = 0; i < sals.nelts; i++) | |
1671 | { | |
1672 | sal = sals.sals[i]; | |
1673 | if (sal.pc == 0 && sal.symtab != 0) | |
1674 | { | |
1675 | pc = find_line_pc (sal.symtab, sal.line); | |
1676 | if (pc == 0) | |
1677 | error ("No line %d in file \"%s\".", | |
1678 | sal.line, sal.symtab->filename); | |
1679 | } | |
1680 | else | |
1681 | pc = sal.pc; | |
1682 | ||
1683 | while (arg && *arg) | |
1684 | { | |
1685 | if (arg[0] == 'i' && arg[1] == 'f' | |
1686 | && (arg[2] == ' ' || arg[2] == '\t')) | |
1687 | cond = (struct expression *) parse_c_1 ((arg += 2, &arg), | |
1688 | block_for_pc (pc), 0); | |
1689 | else | |
1690 | error ("Junk at end of arguments."); | |
1691 | } | |
1692 | arg = save_arg; | |
1693 | sals.sals[i].pc = pc; | |
1694 | } | |
1695 | ||
1696 | for (i = 0; i < sals.nelts; i++) | |
1697 | { | |
1698 | sal = sals.sals[i]; | |
1699 | ||
1700 | if (from_tty) | |
1701 | describe_other_breakpoints (sal.pc); | |
1702 | ||
1703 | b = set_raw_breakpoint (sal); | |
1704 | b->number = ++breakpoint_count; | |
1705 | b->cond = cond; | |
1706 | if (tempflag) | |
1707 | b->enable = temporary; | |
1708 | ||
1709 | printf ("Breakpoint %d at 0x%x", b->number, b->address); | |
1710 | if (b->symtab) | |
1711 | printf (": file %s, line %d.", b->symtab->filename, b->line_number); | |
1712 | printf ("\n"); | |
1713 | } | |
1714 | ||
1715 | if (sals.nelts > 1) | |
1716 | { | |
1717 | printf ("Multiple breakpoints were set.\n"); | |
1718 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
1719 | } | |
1720 | free (sals.sals); | |
1721 | } | |
1722 | ||
1723 | /* Disable breakpoints on all catch clauses described in ARGS. */ | |
1724 | static void | |
1725 | disable_catch (args) | |
1726 | char *args; | |
1727 | { | |
1728 | /* Map the disable command to catch clauses described in ARGS. */ | |
1729 | } | |
1730 | ||
1731 | /* Enable breakpoints on all catch clauses described in ARGS. */ | |
1732 | static void | |
1733 | enable_catch (args) | |
1734 | char *args; | |
1735 | { | |
1736 | /* Map the disable command to catch clauses described in ARGS. */ | |
1737 | } | |
1738 | ||
1739 | /* Delete breakpoints on all catch clauses in the active scope. */ | |
1740 | static void | |
1741 | delete_catch (args) | |
1742 | char *args; | |
1743 | { | |
1744 | /* Map the delete command to catch clauses described in ARGS. */ | |
1745 | } | |
1746 | ||
1747 | static void | |
1748 | catch_command (arg, from_tty) | |
1749 | char *arg; | |
1750 | int from_tty; | |
1751 | { | |
1752 | catch_command_1 (arg, 0, from_tty); | |
1753 | } | |
1754 | \f | |
1755 | static void | |
1756 | clear_command (arg, from_tty) | |
1757 | char *arg; | |
1758 | int from_tty; | |
1759 | { | |
1760 | register struct breakpoint *b, *b1; | |
1761 | struct symtabs_and_lines sals; | |
1762 | struct symtab_and_line sal; | |
1763 | register struct breakpoint *found; | |
1764 | int i; | |
1765 | ||
1766 | if (arg) | |
1767 | { | |
1768 | sals = decode_line_spec (arg, 1); | |
1769 | } | |
1770 | else | |
1771 | { | |
1772 | sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); | |
1773 | sal.line = default_breakpoint_line; | |
1774 | sal.symtab = default_breakpoint_symtab; | |
1775 | sal.pc = 0; | |
1776 | if (sal.symtab == 0) | |
1777 | error ("No source file specified."); | |
1778 | ||
1779 | sals.sals[0] = sal; | |
1780 | sals.nelts = 1; | |
1781 | } | |
1782 | ||
1783 | for (i = 0; i < sals.nelts; i++) | |
1784 | { | |
1785 | /* If exact pc given, clear bpts at that pc. | |
1786 | But if sal.pc is zero, clear all bpts on specified line. */ | |
1787 | sal = sals.sals[i]; | |
1788 | found = (struct breakpoint *) 0; | |
1789 | while (breakpoint_chain | |
1790 | && (sal.pc ? breakpoint_chain->address == sal.pc | |
1791 | : (breakpoint_chain->symtab == sal.symtab | |
1792 | && breakpoint_chain->line_number == sal.line))) | |
1793 | { | |
1794 | b1 = breakpoint_chain; | |
1795 | breakpoint_chain = b1->next; | |
1796 | b1->next = found; | |
1797 | found = b1; | |
1798 | } | |
1799 | ||
1800 | ALL_BREAKPOINTS (b) | |
1801 | while (b->next | |
1802 | && b->next->address != NULL | |
1803 | && (sal.pc ? b->next->address == sal.pc | |
1804 | : (b->next->symtab == sal.symtab | |
1805 | && b->next->line_number == sal.line))) | |
1806 | { | |
1807 | b1 = b->next; | |
1808 | b->next = b1->next; | |
1809 | b1->next = found; | |
1810 | found = b1; | |
1811 | } | |
1812 | ||
1813 | if (found == 0) | |
1814 | { | |
1815 | if (arg) | |
1816 | error ("No breakpoint at %s.", arg); | |
1817 | else | |
1818 | error ("No breakpoint at this line."); | |
1819 | } | |
1820 | ||
1821 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ | |
1822 | if (from_tty) printf ("Deleted breakpoint%s ", found->next ? "s" : ""); | |
1823 | while (found) | |
1824 | { | |
1825 | if (from_tty) printf ("%d ", found->number); | |
1826 | b1 = found->next; | |
1827 | delete_breakpoint (found); | |
1828 | found = b1; | |
1829 | } | |
1830 | if (from_tty) putchar ('\n'); | |
1831 | } | |
1832 | free (sals.sals); | |
1833 | } | |
1834 | \f | |
1835 | /* Delete breakpoint in BS if they are `delete' breakpoints. | |
1836 | This is called after any breakpoint is hit, or after errors. */ | |
1837 | ||
1838 | void | |
1839 | breakpoint_auto_delete (bs) | |
1840 | bpstat bs; | |
1841 | { | |
1842 | for (; bs; bs = bs->next) | |
1843 | if (bs->breakpoint_at && bs->breakpoint_at->enable == delete) | |
1844 | delete_breakpoint (bs->breakpoint_at); | |
1845 | } | |
1846 | ||
1847 | /* Delete a breakpoint and clean up all traces of it in the data structures. */ | |
1848 | ||
1849 | static void | |
1850 | delete_breakpoint (bpt) | |
1851 | struct breakpoint *bpt; | |
1852 | { | |
1853 | register struct breakpoint *b; | |
1854 | register bpstat bs; | |
1855 | ||
1856 | if (bpt->inserted) | |
1857 | target_remove_breakpoint(bpt->address, bpt->shadow_contents); | |
1858 | ||
1859 | if (breakpoint_chain == bpt) | |
1860 | breakpoint_chain = bpt->next; | |
1861 | ||
1862 | ALL_BREAKPOINTS (b) | |
1863 | if (b->next == bpt) | |
1864 | { | |
1865 | b->next = bpt->next; | |
1866 | break; | |
1867 | } | |
1868 | ||
1869 | check_duplicates (bpt->address); | |
1870 | ||
1871 | free_command_lines (&bpt->commands); | |
1872 | if (bpt->cond) | |
1873 | free (bpt->cond); | |
1874 | if (bpt->cond_string != NULL) | |
1875 | free (bpt->cond_string); | |
1876 | if (bpt->addr_string != NULL) | |
1877 | free (bpt->addr_string); | |
1878 | ||
1879 | if (xgdb_verbose && bpt->number >=0) | |
1880 | printf ("breakpoint #%d deleted\n", bpt->number); | |
1881 | ||
1882 | /* Be sure no bpstat's are pointing at it after it's been freed. */ | |
1883 | /* FIXME, how can we find all bpstat's? We just check stop_bpstat for now. */ | |
1884 | for (bs = stop_bpstat; bs; bs = bs->next) | |
1885 | if (bs->breakpoint_at == bpt) | |
1886 | bs->breakpoint_at = NULL; | |
1887 | free (bpt); | |
1888 | } | |
1889 | ||
1890 | static void map_breakpoint_numbers (); | |
1891 | ||
1892 | static void | |
1893 | delete_command (arg, from_tty) | |
1894 | char *arg; | |
1895 | int from_tty; | |
1896 | { | |
1897 | ||
1898 | if (arg == 0) | |
1899 | { | |
1900 | /* Ask user only if there are some breakpoints to delete. */ | |
1901 | if (!from_tty | |
1902 | || (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0))) | |
1903 | { | |
1904 | /* No arg; clear all breakpoints. */ | |
1905 | while (breakpoint_chain) | |
1906 | delete_breakpoint (breakpoint_chain); | |
1907 | } | |
1908 | } | |
1909 | else | |
1910 | map_breakpoint_numbers (arg, delete_breakpoint); | |
1911 | } | |
1912 | ||
1913 | static void | |
1914 | breakpoint_re_set_one (bint) | |
1915 | int bint; | |
1916 | { | |
1917 | struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ | |
1918 | int i; | |
1919 | struct symtabs_and_lines sals; | |
1920 | struct symtab_and_line sal; | |
1921 | char *s; | |
1922 | ||
1923 | if (b->address != NULL && b->addr_string != NULL) | |
1924 | { | |
1925 | s = b->addr_string; | |
1926 | sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0); | |
1927 | for (i = 0; i < sals.nelts; i++) | |
1928 | { | |
1929 | sal = sals.sals[i]; | |
1930 | ||
1931 | b->symtab = sal.symtab; | |
1932 | b->line_number = sal.line; | |
1933 | if (sal.pc == 0 && sal.symtab != 0) | |
1934 | { | |
1935 | sal.pc = find_line_pc (sal.symtab, sal.line); | |
1936 | if (sal.pc == 0) | |
1937 | error ("No line %d in file \"%s\".", | |
1938 | sal.line, sal.symtab->filename); | |
1939 | } | |
1940 | b->address = sal.pc; | |
1941 | ||
1942 | if (b->cond_string != NULL) | |
1943 | { | |
1944 | s = b->cond_string; | |
1945 | b->cond = parse_c_1 (&s, block_for_pc (sal.pc), 0); | |
1946 | } | |
1947 | ||
1948 | check_duplicates (b->address); | |
1949 | ||
1950 | mention (b); | |
1951 | } | |
1952 | free (sals.sals); | |
1953 | } | |
1954 | else | |
1955 | { | |
1956 | /* Anything without a string can't be re-set. */ | |
1957 | delete_breakpoint (b); | |
1958 | } | |
1959 | } | |
1960 | ||
1961 | /* Re-set all breakpoints after symbols have been re-loaded. */ | |
1962 | void | |
1963 | breakpoint_re_set () | |
1964 | { | |
1965 | struct breakpoint *b; | |
1966 | ||
1967 | ALL_BREAKPOINTS (b) | |
1968 | { | |
1969 | b->symtab = 0; /* Be sure we don't point to old dead symtab */ | |
1970 | (void) catch_errors (breakpoint_re_set_one, (int) b, | |
1971 | "Error in re-setting breakpoint"); | |
1972 | } | |
1973 | ||
1974 | /* Blank line to finish off all those mention() messages we just printed. */ | |
1975 | printf_filtered ("\n"); | |
1976 | } | |
1977 | \f | |
1978 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |
1979 | If from_tty is nonzero, it prints a message to that effect, | |
1980 | which ends with a period (no newline). */ | |
1981 | ||
1982 | void | |
1983 | set_ignore_count (bptnum, count, from_tty) | |
1984 | int bptnum, count, from_tty; | |
1985 | { | |
1986 | register struct breakpoint *b; | |
1987 | ||
1988 | if (count < 0) | |
1989 | count = 0; | |
1990 | ||
1991 | ALL_BREAKPOINTS (b) | |
1992 | if (b->number == bptnum) | |
1993 | { | |
1994 | b->ignore_count = count; | |
1995 | if (!from_tty) | |
1996 | return; | |
1997 | else if (count == 0) | |
1998 | printf ("Will stop next time breakpoint %d is reached.", bptnum); | |
1999 | else if (count == 1) | |
2000 | printf ("Will ignore next crossing of breakpoint %d.", bptnum); | |
2001 | else | |
2002 | printf ("Will ignore next %d crossings of breakpoint %d.", | |
2003 | count, bptnum); | |
2004 | return; | |
2005 | } | |
2006 | ||
2007 | error ("No breakpoint number %d.", bptnum); | |
2008 | } | |
2009 | ||
2010 | /* Clear the ignore counts of all breakpoints. */ | |
2011 | void | |
2012 | breakpoint_clear_ignore_counts () | |
2013 | { | |
2014 | struct breakpoint *b; | |
2015 | ||
2016 | ALL_BREAKPOINTS (b) | |
2017 | b->ignore_count = 0; | |
2018 | } | |
2019 | ||
2020 | /* Command to set ignore-count of breakpoint N to COUNT. */ | |
2021 | ||
2022 | static void | |
2023 | ignore_command (args, from_tty) | |
2024 | char *args; | |
2025 | int from_tty; | |
2026 | { | |
2027 | char *p = args; | |
2028 | register int num; | |
2029 | ||
2030 | if (p == 0) | |
2031 | error_no_arg ("a breakpoint number"); | |
2032 | ||
2033 | num = get_number (&p); | |
2034 | ||
2035 | if (*p == 0) | |
2036 | error ("Second argument (specified ignore-count) is missing."); | |
2037 | ||
2038 | set_ignore_count (num, parse_and_eval_address (p), from_tty); | |
2039 | printf ("\n"); | |
2040 | } | |
2041 | \f | |
2042 | /* Call FUNCTION on each of the breakpoints | |
2043 | whose numbers are given in ARGS. */ | |
2044 | ||
2045 | static void | |
2046 | map_breakpoint_numbers (args, function) | |
2047 | char *args; | |
2048 | void (*function) (); | |
2049 | { | |
2050 | register char *p = args; | |
2051 | char *p1; | |
2052 | register int num; | |
2053 | register struct breakpoint *b; | |
2054 | ||
2055 | if (p == 0) | |
2056 | error_no_arg ("one or more breakpoint numbers"); | |
2057 | ||
2058 | while (*p) | |
2059 | { | |
2060 | p1 = p; | |
2061 | ||
2062 | num = get_number (&p1); | |
2063 | ||
2064 | ALL_BREAKPOINTS (b) | |
2065 | if (b->number == num) | |
2066 | { | |
2067 | function (b); | |
2068 | goto win; | |
2069 | } | |
2070 | printf ("No breakpoint number %d.\n", num); | |
2071 | win: | |
2072 | p = p1; | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | static void | |
2077 | enable_breakpoint (bpt) | |
2078 | struct breakpoint *bpt; | |
2079 | { | |
2080 | bpt->enable = enabled; | |
2081 | ||
2082 | if (xgdb_verbose && bpt->number >= 0) | |
2083 | printf ("breakpoint #%d enabled\n", bpt->number); | |
2084 | ||
2085 | check_duplicates (bpt->address); | |
2086 | if (bpt->val != NULL) | |
2087 | { | |
f266e564 JK |
2088 | if (bpt->exp_valid_block != NULL |
2089 | && !contained_in (get_selected_block (), bpt->exp_valid_block)) | |
2090 | { | |
2091 | printf_filtered ("\ | |
2092 | Cannot enable watchpoint %d because the block in which its expression\n\ | |
2093 | is valid is not currently in scope.\n", bpt->number); | |
2094 | return; | |
2095 | } | |
2096 | ||
bd5635a1 RP |
2097 | value_free (bpt->val); |
2098 | ||
2099 | bpt->val = evaluate_expression (bpt->exp); | |
2100 | release_value (bpt->val); | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | static void | |
2105 | enable_command (args, from_tty) | |
2106 | char *args; | |
2107 | int from_tty; | |
2108 | { | |
2109 | struct breakpoint *bpt; | |
2110 | if (args == 0) | |
2111 | ALL_BREAKPOINTS (bpt) | |
2112 | enable_breakpoint (bpt); | |
2113 | else | |
2114 | map_breakpoint_numbers (args, enable_breakpoint); | |
2115 | } | |
2116 | ||
2117 | static void | |
2118 | disable_breakpoint (bpt) | |
2119 | struct breakpoint *bpt; | |
2120 | { | |
2121 | bpt->enable = disabled; | |
2122 | ||
2123 | if (xgdb_verbose && bpt->number >= 0) | |
2124 | printf ("breakpoint #%d disabled\n", bpt->number); | |
2125 | ||
2126 | check_duplicates (bpt->address); | |
2127 | } | |
2128 | ||
2129 | static void | |
2130 | disable_command (args, from_tty) | |
2131 | char *args; | |
2132 | int from_tty; | |
2133 | { | |
2134 | register struct breakpoint *bpt; | |
2135 | if (args == 0) | |
2136 | ALL_BREAKPOINTS (bpt) | |
2137 | disable_breakpoint (bpt); | |
2138 | else | |
2139 | map_breakpoint_numbers (args, disable_breakpoint); | |
2140 | } | |
2141 | ||
2142 | static void | |
2143 | enable_once_breakpoint (bpt) | |
2144 | struct breakpoint *bpt; | |
2145 | { | |
2146 | bpt->enable = temporary; | |
2147 | ||
2148 | check_duplicates (bpt->address); | |
2149 | } | |
2150 | ||
2151 | static void | |
2152 | enable_once_command (args, from_tty) | |
2153 | char *args; | |
2154 | int from_tty; | |
2155 | { | |
2156 | map_breakpoint_numbers (args, enable_once_breakpoint); | |
2157 | } | |
2158 | ||
2159 | static void | |
2160 | enable_delete_breakpoint (bpt) | |
2161 | struct breakpoint *bpt; | |
2162 | { | |
2163 | bpt->enable = delete; | |
2164 | ||
2165 | check_duplicates (bpt->address); | |
2166 | } | |
2167 | ||
2168 | static void | |
2169 | enable_delete_command (args, from_tty) | |
2170 | char *args; | |
2171 | int from_tty; | |
2172 | { | |
2173 | map_breakpoint_numbers (args, enable_delete_breakpoint); | |
2174 | } | |
2175 | \f | |
2176 | /* | |
2177 | * Use default_breakpoint_'s, or nothing if they aren't valid. | |
2178 | */ | |
2179 | struct symtabs_and_lines | |
2180 | decode_line_spec_1 (string, funfirstline) | |
2181 | char *string; | |
2182 | int funfirstline; | |
2183 | { | |
2184 | struct symtabs_and_lines sals; | |
2185 | if (string == 0) | |
2186 | error ("Empty line specification."); | |
2187 | if (default_breakpoint_valid) | |
2188 | sals = decode_line_1 (&string, funfirstline, | |
2189 | default_breakpoint_symtab, default_breakpoint_line); | |
2190 | else | |
2191 | sals = decode_line_1 (&string, funfirstline, (struct symtab *)NULL, 0); | |
2192 | if (*string) | |
2193 | error ("Junk at end of line specification: %s", string); | |
2194 | return sals; | |
2195 | } | |
2196 | \f | |
2197 | ||
2198 | /* Chain containing all defined enable commands. */ | |
2199 | ||
2200 | extern struct cmd_list_element | |
2201 | *enablelist, *disablelist, | |
2202 | *deletelist, *enablebreaklist; | |
2203 | ||
2204 | extern struct cmd_list_element *cmdlist; | |
2205 | ||
2206 | void | |
2207 | _initialize_breakpoint () | |
2208 | { | |
2209 | breakpoint_chain = 0; | |
2210 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful | |
2211 | before a breakpoint is set. */ | |
2212 | breakpoint_count = 0; | |
2213 | ||
2214 | add_com ("ignore", class_breakpoint, ignore_command, | |
2215 | "Set ignore-count of breakpoint number N to COUNT."); | |
2216 | ||
2217 | add_com ("commands", class_breakpoint, commands_command, | |
2218 | "Set commands to be executed when a breakpoint is hit.\n\ | |
2219 | Give breakpoint number as argument after \"commands\".\n\ | |
2220 | With no argument, the targeted breakpoint is the last one set.\n\ | |
2221 | The commands themselves follow starting on the next line.\n\ | |
2222 | Type a line containing \"end\" to indicate the end of them.\n\ | |
2223 | Give \"silent\" as the first line to make the breakpoint silent;\n\ | |
2224 | then no output is printed when it is hit, except what the commands print."); | |
2225 | ||
2226 | add_com ("condition", class_breakpoint, condition_command, | |
2227 | "Specify breakpoint number N to break only if COND is true.\n\ | |
2228 | N is an integer; COND is a C expression to be evaluated whenever\n\ | |
2229 | breakpoint N is reached. Actually break only when COND is nonzero."); | |
2230 | ||
2231 | add_com ("tbreak", class_breakpoint, tbreak_command, | |
2232 | "Set a temporary breakpoint. Args like \"break\" command.\n\ | |
2233 | Like \"break\" except the breakpoint is only enabled temporarily,\n\ | |
2234 | so it will be disabled when hit. Equivalent to \"break\" followed\n\ | |
2235 | by using \"enable once\" on the breakpoint number."); | |
2236 | ||
2237 | add_prefix_cmd ("enable", class_breakpoint, enable_command, | |
2238 | "Enable some breakpoints.\n\ | |
2239 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
2240 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
2241 | This is used to cancel the effect of the \"disable\" command.\n\ | |
2242 | With a subcommand you can enable temporarily.", | |
2243 | &enablelist, "enable ", 1, &cmdlist); | |
2244 | ||
2245 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, | |
2246 | "Enable some breakpoints.\n\ | |
2247 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
2248 | This is used to cancel the effect of the \"disable\" command.\n\ | |
2249 | May be abbreviated to simply \"enable\".\n", | |
2250 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); | |
2251 | ||
2252 | add_cmd ("once", no_class, enable_once_command, | |
2253 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
2254 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ | |
2255 | See the \"tbreak\" command which sets a breakpoint and enables it once.", | |
2256 | &enablebreaklist); | |
2257 | ||
2258 | add_cmd ("delete", no_class, enable_delete_command, | |
2259 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
2260 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
2261 | &enablebreaklist); | |
2262 | ||
2263 | add_cmd ("delete", no_class, enable_delete_command, | |
2264 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
2265 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
2266 | &enablelist); | |
2267 | ||
2268 | add_cmd ("once", no_class, enable_once_command, | |
2269 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
2270 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ | |
2271 | See the \"tbreak\" command which sets a breakpoint and enables it once.", | |
2272 | &enablelist); | |
2273 | ||
2274 | add_prefix_cmd ("disable", class_breakpoint, disable_command, | |
2275 | "Disable some breakpoints.\n\ | |
2276 | Arguments are breakpoint numbers with spaces in between.\n\ | |
2277 | To disable all breakpoints, give no argument.\n\ | |
2278 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", | |
2279 | &disablelist, "disable ", 1, &cmdlist); | |
2280 | add_com_alias ("dis", "disable", class_breakpoint, 1); | |
2281 | add_com_alias ("disa", "disable", class_breakpoint, 1); | |
2282 | ||
2283 | add_cmd ("breakpoints", class_alias, disable_command, | |
2284 | "Disable some breakpoints.\n\ | |
2285 | Arguments are breakpoint numbers with spaces in between.\n\ | |
2286 | To disable all breakpoints, give no argument.\n\ | |
2287 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |
2288 | This command may be abbreviated \"disable\".", | |
2289 | &disablelist); | |
2290 | ||
2291 | add_prefix_cmd ("delete", class_breakpoint, delete_command, | |
2292 | "Delete some breakpoints or auto-display expressions.\n\ | |
2293 | Arguments are breakpoint numbers with spaces in between.\n\ | |
2294 | To delete all breakpoints, give no argument.\n\ | |
2295 | \n\ | |
2296 | Also a prefix command for deletion of other GDB objects.\n\ | |
2297 | The \"unset\" command is also an alias for \"delete\".", | |
2298 | &deletelist, "delete ", 1, &cmdlist); | |
2299 | add_com_alias ("d", "delete", class_breakpoint, 1); | |
bd5635a1 RP |
2300 | |
2301 | add_cmd ("breakpoints", class_alias, delete_command, | |
2302 | "Delete some breakpoints or auto-display expressions.\n\ | |
2303 | Arguments are breakpoint numbers with spaces in between.\n\ | |
2304 | To delete all breakpoints, give no argument.\n\ | |
2305 | This command may be abbreviated \"delete\".", | |
2306 | &deletelist); | |
2307 | ||
2308 | add_com ("clear", class_breakpoint, clear_command, | |
2309 | "Clear breakpoint at specified line or function.\n\ | |
2310 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
2311 | If line number is specified, all breakpoints in that line are cleared.\n\ | |
2312 | If function is specified, breakpoints at beginning of function are cleared.\n\ | |
2313 | If an address is specified, breakpoints at that address are cleared.\n\n\ | |
2314 | With no argument, clears all breakpoints in the line that the selected frame\n\ | |
2315 | is executing in.\n\ | |
2316 | \n\ | |
2317 | See also the \"delete\" command which clears breakpoints by number."); | |
2318 | ||
2319 | add_com ("break", class_breakpoint, break_command, | |
2320 | "Set breakpoint at specified line or function.\n\ | |
2321 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
2322 | If line number is specified, break at start of code for that line.\n\ | |
2323 | If function is specified, break at start of code for that function.\n\ | |
2324 | If an address is specified, break at that exact address.\n\ | |
2325 | With no arg, uses current execution address of selected stack frame.\n\ | |
2326 | This is useful for breaking on return to a stack frame.\n\ | |
2327 | \n\ | |
2328 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
2329 | \n\ | |
2330 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
2331 | add_com_alias ("b", "break", class_run, 1); | |
2332 | add_com_alias ("br", "break", class_run, 1); | |
2333 | add_com_alias ("bre", "break", class_run, 1); | |
2334 | add_com_alias ("brea", "break", class_run, 1); | |
2335 | ||
2336 | add_info ("breakpoints", breakpoints_info, | |
2337 | "Status of all breakpoints, or breakpoint number NUMBER.\n\ | |
2338 | Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\ | |
2339 | \"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\ | |
2340 | Then come the address and the file/line number.\n\n\ | |
2341 | Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
2342 | are set to the address of the last breakpoint listed.\n\n\ | |
2343 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
2344 | breakpoint set."); | |
2345 | ||
2346 | add_com ("catch", class_breakpoint, catch_command, | |
2347 | "Set breakpoints to catch exceptions that are raised.\n\ | |
2348 | Argument may be a single exception to catch, multiple exceptions\n\ | |
2349 | to catch, or the default exception \"default\". If no arguments\n\ | |
2350 | are given, breakpoints are set at all exception handlers catch clauses\n\ | |
2351 | within the current scope.\n\ | |
2352 | \n\ | |
2353 | A condition specified for the catch applies to all breakpoints set\n\ | |
2354 | with this command\n\ | |
2355 | \n\ | |
2356 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
2357 | ||
2358 | add_com ("watch", class_breakpoint, watch_command, | |
2359 | "Set a watchpoint for an expression.\n\ | |
2360 | A watchpoint stops execution of your program whenever the value of\n\ | |
2361 | an expression changes."); | |
2362 | ||
2363 | add_info ("watchpoints", watchpoints_info, | |
2364 | "Status of all watchpoints, or watchpoint number NUMBER.\n\ | |
2365 | Second column is \"y\" for enabled watchpoints, \"n\" for disabled."); | |
2366 | } |