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 | 19 | |
bd5635a1 | 20 | #include "defs.h" |
1eeba686 | 21 | #include <ctype.h> |
bd5635a1 RP |
22 | #include "symtab.h" |
23 | #include "frame.h" | |
24 | #include "breakpoint.h" | |
30875e1c | 25 | #include "gdbtypes.h" |
bd5635a1 RP |
26 | #include "expression.h" |
27 | #include "gdbcore.h" | |
28 | #include "gdbcmd.h" | |
29 | #include "value.h" | |
30 | #include "ctype.h" | |
31 | #include "command.h" | |
32 | #include "inferior.h" | |
33 | #include "target.h" | |
d3b9c0df | 34 | #include "language.h" |
bd5635a1 | 35 | #include <string.h> |
423e9664 | 36 | #include "demangle.h" |
bd5635a1 | 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 | ||
30875e1c SG |
109 | static void |
110 | breakpoints_info PARAMS ((char *, int)); | |
111 | ||
112 | static void | |
423e9664 | 113 | breakpoint_1 PARAMS ((int, int)); |
30875e1c SG |
114 | |
115 | static bpstat | |
116 | bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); | |
117 | ||
118 | static int | |
119 | breakpoint_cond_eval PARAMS ((char *)); | |
120 | ||
121 | static void | |
122 | cleanup_executing_breakpoints PARAMS ((int)); | |
123 | ||
124 | static void | |
125 | commands_command PARAMS ((char *, int)); | |
126 | ||
127 | static void | |
128 | condition_command PARAMS ((char *, int)); | |
129 | ||
130 | static int | |
131 | get_number PARAMS ((char **)); | |
132 | ||
133 | static void | |
134 | set_breakpoint_count PARAMS ((int)); | |
135 | ||
136 | ||
bd5635a1 RP |
137 | extern int addressprint; /* Print machine addresses? */ |
138 | extern int demangle; /* Print de-mangled symbol names? */ | |
139 | ||
bd5635a1 RP |
140 | /* Are we executing breakpoint commands? */ |
141 | static int executing_breakpoint_commands; | |
142 | ||
cba0d141 JG |
143 | /* Walk the following statement or block through all breakpoints. |
144 | ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current | |
145 | breakpoint. */ | |
146 | ||
bd5635a1 RP |
147 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) |
148 | ||
cba0d141 JG |
149 | #define ALL_BREAKPOINTS_SAFE(b,tmp) \ |
150 | for (b = breakpoint_chain; \ | |
151 | b? (tmp=b->next, 1): 0; \ | |
152 | b = tmp) | |
153 | ||
bd5635a1 RP |
154 | /* Chain of all breakpoints defined. */ |
155 | ||
156 | struct breakpoint *breakpoint_chain; | |
157 | ||
158 | /* Number of last breakpoint made. */ | |
159 | ||
160 | static int breakpoint_count; | |
161 | ||
162 | /* Set breakpoint count to NUM. */ | |
163 | static void | |
164 | set_breakpoint_count (num) | |
165 | int num; | |
166 | { | |
167 | breakpoint_count = num; | |
168 | set_internalvar (lookup_internalvar ("bpnum"), | |
06b6c733 | 169 | value_from_longest (builtin_type_int, (LONGEST) num)); |
bd5635a1 RP |
170 | } |
171 | ||
172 | /* Default address, symtab and line to put a breakpoint at | |
173 | for "break" command with no arg. | |
174 | if default_breakpoint_valid is zero, the other three are | |
175 | not valid, and "break" with no arg is an error. | |
176 | ||
177 | This set by print_stack_frame, which calls set_default_breakpoint. */ | |
178 | ||
179 | int default_breakpoint_valid; | |
180 | CORE_ADDR default_breakpoint_address; | |
181 | struct symtab *default_breakpoint_symtab; | |
182 | int default_breakpoint_line; | |
183 | ||
bd5635a1 RP |
184 | /* Flag indicating extra verbosity for xgdb. */ |
185 | extern int xgdb_verbose; | |
186 | \f | |
187 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. | |
188 | Advance *PP after the string and any trailing whitespace. | |
189 | ||
190 | Currently the string can either be a number or "$" followed by the name | |
191 | of a convenience variable. Making it an expression wouldn't work well | |
192 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ | |
193 | static int | |
194 | get_number (pp) | |
195 | char **pp; | |
196 | { | |
197 | int retval; | |
198 | char *p = *pp; | |
199 | ||
200 | if (p == NULL) | |
201 | /* Empty line means refer to the last breakpoint. */ | |
202 | return breakpoint_count; | |
203 | else if (*p == '$') | |
204 | { | |
205 | /* Make a copy of the name, so we can null-terminate it | |
206 | to pass to lookup_internalvar(). */ | |
207 | char *varname; | |
208 | char *start = ++p; | |
209 | value val; | |
210 | ||
211 | while (isalnum (*p) || *p == '_') | |
212 | p++; | |
213 | varname = (char *) alloca (p - start + 1); | |
214 | strncpy (varname, start, p - start); | |
215 | varname[p - start] = '\0'; | |
216 | val = value_of_internalvar (lookup_internalvar (varname)); | |
217 | if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT) | |
218 | error ( | |
219 | "Convenience variables used to specify breakpoints must have integer values." | |
220 | ); | |
221 | retval = (int) value_as_long (val); | |
222 | } | |
223 | else | |
224 | { | |
80ba48f5 SG |
225 | if (*p == '-') |
226 | ++p; | |
bd5635a1 RP |
227 | while (*p >= '0' && *p <= '9') |
228 | ++p; | |
229 | if (p == *pp) | |
230 | /* There is no number here. (e.g. "cond a == b"). */ | |
231 | error_no_arg ("breakpoint number"); | |
232 | retval = atoi (*pp); | |
233 | } | |
234 | if (!(isspace (*p) || *p == '\0')) | |
235 | error ("breakpoint number expected"); | |
236 | while (isspace (*p)) | |
237 | p++; | |
238 | *pp = p; | |
239 | return retval; | |
240 | } | |
241 | \f | |
242 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ | |
243 | ||
244 | static void | |
245 | condition_command (arg, from_tty) | |
246 | char *arg; | |
247 | int from_tty; | |
248 | { | |
249 | register struct breakpoint *b; | |
250 | char *p; | |
251 | register int bnum; | |
252 | ||
253 | if (arg == 0) | |
254 | error_no_arg ("breakpoint number"); | |
255 | ||
256 | p = arg; | |
257 | bnum = get_number (&p); | |
258 | ||
259 | ALL_BREAKPOINTS (b) | |
260 | if (b->number == bnum) | |
261 | { | |
262 | if (b->cond) | |
263 | { | |
c8950965 | 264 | free ((PTR)b->cond); |
bd5635a1 RP |
265 | b->cond = 0; |
266 | } | |
267 | if (b->cond_string != NULL) | |
c8950965 | 268 | free ((PTR)b->cond_string); |
bd5635a1 RP |
269 | |
270 | if (*p == 0) | |
271 | { | |
272 | b->cond = 0; | |
273 | b->cond_string = NULL; | |
274 | if (from_tty) | |
423e9664 | 275 | printf_filtered ("Breakpoint %d now unconditional.\n", bnum); |
bd5635a1 RP |
276 | } |
277 | else | |
278 | { | |
279 | arg = p; | |
280 | /* I don't know if it matters whether this is the string the user | |
281 | typed in or the decompiled expression. */ | |
282 | b->cond_string = savestring (arg, strlen (arg)); | |
d3b9c0df | 283 | b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); |
bd5635a1 RP |
284 | if (*arg) |
285 | error ("Junk at end of expression"); | |
286 | } | |
287 | return; | |
288 | } | |
289 | ||
290 | error ("No breakpoint number %d.", bnum); | |
291 | } | |
292 | ||
bdbd5f50 | 293 | /* ARGSUSED */ |
bd5635a1 RP |
294 | static void |
295 | commands_command (arg, from_tty) | |
296 | char *arg; | |
297 | int from_tty; | |
298 | { | |
299 | register struct breakpoint *b; | |
300 | char *p; | |
301 | register int bnum; | |
302 | struct command_line *l; | |
303 | ||
304 | /* If we allowed this, we would have problems with when to | |
305 | free the storage, if we change the commands currently | |
306 | being read from. */ | |
307 | ||
308 | if (executing_breakpoint_commands) | |
309 | error ("Can't use the \"commands\" command among a breakpoint's commands."); | |
310 | ||
311 | p = arg; | |
312 | bnum = get_number (&p); | |
313 | if (p && *p) | |
314 | error ("Unexpected extra arguments following breakpoint number."); | |
315 | ||
316 | ALL_BREAKPOINTS (b) | |
317 | if (b->number == bnum) | |
318 | { | |
bdbd5f50 | 319 | if (from_tty && input_from_terminal_p ()) |
9b280a7f | 320 | printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\ |
bd5635a1 | 321 | End with a line saying just \"end\".\n", bnum); |
bd5635a1 RP |
322 | l = read_command_lines (); |
323 | free_command_lines (&b->commands); | |
324 | b->commands = l; | |
325 | return; | |
326 | } | |
327 | error ("No breakpoint number %d.", bnum); | |
328 | } | |
329 | \f | |
31ef19fc JK |
330 | extern int memory_breakpoint_size; /* from mem-break.c */ |
331 | ||
332 | /* Like target_read_memory() but if breakpoints are inserted, return | |
30875e1c SG |
333 | the shadow contents instead of the breakpoints themselves. |
334 | ||
335 | Read "memory data" from whatever target or inferior we have. | |
336 | Returns zero if successful, errno value if not. EIO is used | |
337 | for address out of bounds. If breakpoints are inserted, returns | |
338 | shadow contents, not the breakpoints themselves. From breakpoint.c. */ | |
339 | ||
31ef19fc JK |
340 | int |
341 | read_memory_nobpt (memaddr, myaddr, len) | |
342 | CORE_ADDR memaddr; | |
343 | char *myaddr; | |
344 | unsigned len; | |
345 | { | |
346 | int status; | |
347 | struct breakpoint *b; | |
348 | ||
349 | if (memory_breakpoint_size < 0) | |
5af4f5f6 JK |
350 | /* No breakpoints on this machine. FIXME: This should be |
351 | dependent on the debugging target. Probably want | |
352 | target_insert_breakpoint to return a size, saying how many | |
353 | bytes of the shadow contents are used, or perhaps have | |
354 | something like target_xfer_shadow. */ | |
31ef19fc JK |
355 | return target_read_memory (memaddr, myaddr, len); |
356 | ||
357 | ALL_BREAKPOINTS (b) | |
358 | { | |
30875e1c | 359 | if (b->type == bp_watchpoint || !b->inserted) |
31ef19fc JK |
360 | continue; |
361 | else if (b->address + memory_breakpoint_size <= memaddr) | |
362 | /* The breakpoint is entirely before the chunk of memory | |
363 | we are reading. */ | |
364 | continue; | |
365 | else if (b->address >= memaddr + len) | |
366 | /* The breakpoint is entirely after the chunk of memory we | |
367 | are reading. */ | |
368 | continue; | |
369 | else | |
370 | { | |
371 | /* Copy the breakpoint from the shadow contents, and recurse | |
372 | for the things before and after. */ | |
373 | ||
374 | /* Addresses and length of the part of the breakpoint that | |
375 | we need to copy. */ | |
376 | CORE_ADDR membpt = b->address; | |
377 | unsigned int bptlen = memory_breakpoint_size; | |
378 | /* Offset within shadow_contents. */ | |
379 | int bptoffset = 0; | |
380 | ||
381 | if (membpt < memaddr) | |
382 | { | |
383 | /* Only copy the second part of the breakpoint. */ | |
384 | bptlen -= memaddr - membpt; | |
385 | bptoffset = memaddr - membpt; | |
386 | membpt = memaddr; | |
387 | } | |
388 | ||
389 | if (membpt + bptlen > memaddr + len) | |
390 | { | |
391 | /* Only copy the first part of the breakpoint. */ | |
392 | bptlen -= (membpt + bptlen) - (memaddr + len); | |
393 | } | |
394 | ||
4ed3a9ea FF |
395 | memcpy (myaddr + membpt - memaddr, |
396 | b->shadow_contents + bptoffset, bptlen); | |
31ef19fc JK |
397 | |
398 | if (membpt > memaddr) | |
399 | { | |
400 | /* Copy the section of memory before the breakpoint. */ | |
401 | status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr); | |
402 | if (status != 0) | |
403 | return status; | |
404 | } | |
405 | ||
406 | if (membpt + bptlen < memaddr + len) | |
407 | { | |
408 | /* Copy the section of memory after the breakpoint. */ | |
409 | status = read_memory_nobpt | |
410 | (membpt + bptlen, | |
411 | myaddr + membpt + bptlen - memaddr, | |
412 | memaddr + len - (membpt + bptlen)); | |
413 | if (status != 0) | |
414 | return status; | |
415 | } | |
416 | return 0; | |
417 | } | |
418 | } | |
419 | /* Nothing overlaps. Just call read_memory_noerr. */ | |
420 | return target_read_memory (memaddr, myaddr, len); | |
421 | } | |
422 | \f | |
bd5635a1 RP |
423 | /* insert_breakpoints is used when starting or continuing the program. |
424 | remove_breakpoints is used when the program stops. | |
425 | Both return zero if successful, | |
426 | or an `errno' value if could not write the inferior. */ | |
427 | ||
428 | int | |
429 | insert_breakpoints () | |
430 | { | |
431 | register struct breakpoint *b; | |
432 | int val = 0; | |
433 | int disabled_breaks = 0; | |
434 | ||
435 | ALL_BREAKPOINTS (b) | |
30875e1c | 436 | if (b->type != bp_watchpoint |
bd5635a1 RP |
437 | && b->enable != disabled |
438 | && ! b->inserted | |
439 | && ! b->duplicate) | |
440 | { | |
441 | val = target_insert_breakpoint(b->address, b->shadow_contents); | |
442 | if (val) | |
443 | { | |
444 | /* Can't set the breakpoint. */ | |
445 | #if defined (DISABLE_UNSETTABLE_BREAK) | |
446 | if (DISABLE_UNSETTABLE_BREAK (b->address)) | |
447 | { | |
448 | val = 0; | |
449 | b->enable = disabled; | |
450 | if (!disabled_breaks) | |
451 | { | |
2d313932 JK |
452 | fprintf (stderr, |
453 | "Cannot insert breakpoint %d:\n", b->number); | |
bd5635a1 RP |
454 | printf_filtered ("Disabling shared library breakpoints:\n"); |
455 | } | |
456 | disabled_breaks = 1; | |
457 | printf_filtered ("%d ", b->number); | |
458 | } | |
459 | else | |
460 | #endif | |
461 | { | |
2d313932 | 462 | fprintf (stderr, "Cannot insert breakpoint %d:\n", b->number); |
d3b9c0df | 463 | #ifdef ONE_PROCESS_WRITETEXT |
2d313932 JK |
464 | fprintf (stderr, |
465 | "The same program may be running in another process.\n"); | |
d3b9c0df | 466 | #endif |
bd5635a1 RP |
467 | memory_error (val, b->address); /* which bombs us out */ |
468 | } | |
469 | } | |
470 | else | |
471 | b->inserted = 1; | |
472 | } | |
473 | if (disabled_breaks) | |
474 | printf_filtered ("\n"); | |
475 | return val; | |
476 | } | |
477 | ||
478 | int | |
479 | remove_breakpoints () | |
480 | { | |
481 | register struct breakpoint *b; | |
482 | int val; | |
483 | ||
484 | #ifdef BREAKPOINT_DEBUG | |
2d313932 | 485 | printf ("Removing breakpoints.\n"); |
bd5635a1 RP |
486 | #endif /* BREAKPOINT_DEBUG */ |
487 | ||
488 | ALL_BREAKPOINTS (b) | |
30875e1c | 489 | if (b->type != bp_watchpoint && b->inserted) |
bd5635a1 RP |
490 | { |
491 | val = target_remove_breakpoint(b->address, b->shadow_contents); | |
492 | if (val) | |
493 | return val; | |
494 | b->inserted = 0; | |
495 | #ifdef BREAKPOINT_DEBUG | |
2d313932 | 496 | printf ("Removed breakpoint at %s", |
cef4c2e7 | 497 | local_hex_string((unsigned long) b->address)); |
2d313932 | 498 | printf (", shadow %s", |
cef4c2e7 | 499 | local_hex_string((unsigned long) b->shadow_contents[0])); |
2d313932 | 500 | printf (", %s.\n", |
cef4c2e7 | 501 | local_hex_string((unsigned long) b->shadow_contents[1])); |
bd5635a1 RP |
502 | #endif /* BREAKPOINT_DEBUG */ |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | /* Clear the "inserted" flag in all breakpoints. | |
509 | This is done when the inferior is loaded. */ | |
510 | ||
511 | void | |
512 | mark_breakpoints_out () | |
513 | { | |
514 | register struct breakpoint *b; | |
515 | ||
516 | ALL_BREAKPOINTS (b) | |
517 | b->inserted = 0; | |
518 | } | |
519 | ||
520 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. | |
521 | When continuing from a location with a breakpoint, | |
522 | we actually single step once before calling insert_breakpoints. */ | |
523 | ||
524 | int | |
525 | breakpoint_here_p (pc) | |
526 | CORE_ADDR pc; | |
527 | { | |
528 | register struct breakpoint *b; | |
529 | ||
530 | ALL_BREAKPOINTS (b) | |
531 | if (b->enable != disabled && b->address == pc) | |
532 | return 1; | |
533 | ||
534 | return 0; | |
535 | } | |
536 | \f | |
537 | /* bpstat stuff. External routines' interfaces are documented | |
538 | in breakpoint.h. */ | |
30875e1c SG |
539 | |
540 | /* Clear a bpstat so that it says we are not at any breakpoint. | |
541 | Also free any storage that is part of a bpstat. */ | |
542 | ||
bd5635a1 RP |
543 | void |
544 | bpstat_clear (bsp) | |
545 | bpstat *bsp; | |
546 | { | |
547 | bpstat p; | |
548 | bpstat q; | |
549 | ||
550 | if (bsp == 0) | |
551 | return; | |
552 | p = *bsp; | |
553 | while (p != NULL) | |
554 | { | |
555 | q = p->next; | |
556 | if (p->old_val != NULL) | |
557 | value_free (p->old_val); | |
c8950965 | 558 | free ((PTR)p); |
bd5635a1 RP |
559 | p = q; |
560 | } | |
561 | *bsp = NULL; | |
562 | } | |
563 | ||
30875e1c SG |
564 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
565 | is part of the bpstat is copied as well. */ | |
566 | ||
bd5635a1 RP |
567 | bpstat |
568 | bpstat_copy (bs) | |
569 | bpstat bs; | |
570 | { | |
571 | bpstat p = NULL; | |
572 | bpstat tmp; | |
fee933f1 | 573 | bpstat retval = NULL; |
bd5635a1 RP |
574 | |
575 | if (bs == NULL) | |
576 | return bs; | |
577 | ||
578 | for (; bs != NULL; bs = bs->next) | |
579 | { | |
580 | tmp = (bpstat) xmalloc (sizeof (*tmp)); | |
4ed3a9ea | 581 | memcpy (tmp, bs, sizeof (*tmp)); |
bd5635a1 RP |
582 | if (p == NULL) |
583 | /* This is the first thing in the chain. */ | |
584 | retval = tmp; | |
585 | else | |
586 | p->next = tmp; | |
587 | p = tmp; | |
588 | } | |
589 | p->next = NULL; | |
590 | return retval; | |
591 | } | |
592 | ||
30875e1c SG |
593 | /* Find the bpstat associated with this breakpoint */ |
594 | ||
595 | bpstat | |
596 | bpstat_find_breakpoint(bsp, breakpoint) | |
597 | bpstat bsp; | |
598 | struct breakpoint *breakpoint; | |
599 | { | |
600 | if (bsp == NULL) return NULL; | |
601 | ||
602 | for (;bsp != NULL; bsp = bsp->next) { | |
603 | if (bsp->breakpoint_at == breakpoint) return bsp; | |
604 | } | |
605 | return NULL; | |
606 | } | |
607 | ||
608 | /* Return the breakpoint number of the first breakpoint we are stopped | |
609 | at. *BSP upon return is a bpstat which points to the remaining | |
610 | breakpoints stopped at (but which is not guaranteed to be good for | |
611 | anything but further calls to bpstat_num). | |
612 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ | |
613 | ||
bd5635a1 RP |
614 | int |
615 | bpstat_num (bsp) | |
616 | bpstat *bsp; | |
617 | { | |
618 | struct breakpoint *b; | |
619 | ||
620 | if ((*bsp) == NULL) | |
621 | return 0; /* No more breakpoint values */ | |
622 | else | |
623 | { | |
624 | b = (*bsp)->breakpoint_at; | |
625 | *bsp = (*bsp)->next; | |
626 | if (b == NULL) | |
627 | return -1; /* breakpoint that's been deleted since */ | |
628 | else | |
629 | return b->number; /* We have its number */ | |
630 | } | |
631 | } | |
632 | ||
30875e1c SG |
633 | /* Modify BS so that the actions will not be performed. */ |
634 | ||
bd5635a1 RP |
635 | void |
636 | bpstat_clear_actions (bs) | |
637 | bpstat bs; | |
638 | { | |
639 | for (; bs != NULL; bs = bs->next) | |
640 | { | |
641 | bs->commands = NULL; | |
642 | if (bs->old_val != NULL) | |
643 | { | |
644 | value_free (bs->old_val); | |
645 | bs->old_val = NULL; | |
646 | } | |
647 | } | |
648 | } | |
649 | ||
bdbd5f50 JG |
650 | /* Stub for cleaning up our state if we error-out of a breakpoint command */ |
651 | /* ARGSUSED */ | |
652 | static void | |
653 | cleanup_executing_breakpoints (ignore) | |
654 | int ignore; | |
655 | { | |
656 | executing_breakpoint_commands = 0; | |
657 | } | |
658 | ||
bd5635a1 RP |
659 | /* Execute all the commands associated with all the breakpoints at this |
660 | location. Any of these commands could cause the process to proceed | |
661 | beyond this point, etc. We look out for such changes by checking | |
662 | the global "breakpoint_proceeded" after each command. */ | |
30875e1c | 663 | |
bd5635a1 RP |
664 | void |
665 | bpstat_do_actions (bsp) | |
666 | bpstat *bsp; | |
667 | { | |
668 | bpstat bs; | |
bdbd5f50 JG |
669 | struct cleanup *old_chain; |
670 | ||
671 | executing_breakpoint_commands = 1; | |
672 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); | |
bd5635a1 RP |
673 | |
674 | top: | |
675 | bs = *bsp; | |
676 | ||
bd5635a1 RP |
677 | breakpoint_proceeded = 0; |
678 | for (; bs != NULL; bs = bs->next) | |
679 | { | |
680 | while (bs->commands) | |
681 | { | |
682 | char *line = bs->commands->line; | |
683 | bs->commands = bs->commands->next; | |
684 | execute_command (line, 0); | |
685 | /* If the inferior is proceeded by the command, bomb out now. | |
686 | The bpstat chain has been blown away by wait_for_inferior. | |
687 | But since execution has stopped again, there is a new bpstat | |
688 | to look at, so start over. */ | |
689 | if (breakpoint_proceeded) | |
690 | goto top; | |
691 | } | |
692 | } | |
bd5635a1 RP |
693 | |
694 | executing_breakpoint_commands = 0; | |
bdbd5f50 | 695 | discard_cleanups (old_chain); |
bd5635a1 RP |
696 | } |
697 | ||
8af68e4e JK |
698 | /* This is the normal print_it function for a bpstat. In the future, |
699 | much of this logic could (should?) be moved to bpstat_stop_status, | |
700 | by having it set different print_it functions. */ | |
30875e1c | 701 | |
8af68e4e JK |
702 | static int |
703 | print_it_normal (bs) | |
bd5635a1 RP |
704 | bpstat bs; |
705 | { | |
706 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint | |
707 | which has since been deleted. */ | |
8af68e4e | 708 | if (bs->breakpoint_at == NULL |
30875e1c SG |
709 | || (bs->breakpoint_at->type != bp_breakpoint |
710 | && bs->breakpoint_at->type != bp_watchpoint)) | |
bd5635a1 | 711 | return 0; |
bd5635a1 | 712 | |
30875e1c | 713 | if (bs->breakpoint_at->type == bp_breakpoint) |
bd5635a1 RP |
714 | { |
715 | /* I think the user probably only wants to see one breakpoint | |
716 | number, not all of them. */ | |
717 | printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); | |
718 | return 0; | |
719 | } | |
720 | ||
721 | if (bs->old_val != NULL) | |
722 | { | |
723 | printf_filtered ("\nWatchpoint %d, ", bs->breakpoint_at->number); | |
724 | print_expression (bs->breakpoint_at->exp, stdout); | |
725 | printf_filtered ("\nOld value = "); | |
726 | value_print (bs->old_val, stdout, 0, Val_pretty_default); | |
727 | printf_filtered ("\nNew value = "); | |
728 | value_print (bs->breakpoint_at->val, stdout, 0, | |
729 | Val_pretty_default); | |
730 | printf_filtered ("\n"); | |
731 | value_free (bs->old_val); | |
732 | bs->old_val = NULL; | |
3f031adf | 733 | return 0; |
bd5635a1 | 734 | } |
8af68e4e JK |
735 | /* We can't deal with it. Maybe another member of the bpstat chain can. */ |
736 | return -1; | |
737 | } | |
738 | ||
739 | /* Print a message indicating what happened. Returns nonzero to | |
740 | say that only the source line should be printed after this (zero | |
741 | return means print the frame as well as the source line). */ | |
3f031adf | 742 | /* Currently we always return zero. */ |
8af68e4e JK |
743 | int |
744 | bpstat_print (bs) | |
745 | bpstat bs; | |
746 | { | |
747 | int val; | |
748 | ||
749 | if (bs == NULL) | |
750 | return 0; | |
bd5635a1 | 751 | |
8af68e4e JK |
752 | val = (*bs->print_it) (bs); |
753 | if (val >= 0) | |
754 | return val; | |
755 | ||
fcb887ff JK |
756 | /* Maybe another breakpoint in the chain caused us to stop. |
757 | (Currently all watchpoints go on the bpstat whether hit or | |
758 | not. That probably could (should) be changed, provided care is taken | |
759 | with respect to bpstat_explains_signal). */ | |
760 | if (bs->next) | |
761 | return bpstat_print (bs->next); | |
762 | ||
cabd4da6 | 763 | /* We reached the end of the chain without printing anything. */ |
bd5635a1 RP |
764 | return 0; |
765 | } | |
766 | ||
767 | /* Evaluate the expression EXP and return 1 if value is zero. | |
768 | This is used inside a catch_errors to evaluate the breakpoint condition. | |
bdbd5f50 | 769 | The argument is a "struct expression *" that has been cast to char * to |
bd5635a1 RP |
770 | make it pass through catch_errors. */ |
771 | ||
772 | static int | |
773 | breakpoint_cond_eval (exp) | |
bdbd5f50 | 774 | char *exp; |
bd5635a1 | 775 | { |
d3b9c0df | 776 | return !value_true (evaluate_expression ((struct expression *)exp)); |
bd5635a1 RP |
777 | } |
778 | ||
779 | /* Allocate a new bpstat and chain it to the current one. */ | |
780 | ||
781 | static bpstat | |
782 | bpstat_alloc (b, cbs) | |
783 | register struct breakpoint *b; | |
784 | bpstat cbs; /* Current "bs" value */ | |
785 | { | |
786 | bpstat bs; | |
787 | ||
788 | bs = (bpstat) xmalloc (sizeof (*bs)); | |
789 | cbs->next = bs; | |
790 | bs->breakpoint_at = b; | |
791 | /* If the condition is false, etc., don't do the commands. */ | |
792 | bs->commands = NULL; | |
bd5635a1 | 793 | bs->old_val = NULL; |
8af68e4e | 794 | bs->print_it = print_it_normal; |
bd5635a1 RP |
795 | return bs; |
796 | } | |
fa99ebe1 JK |
797 | \f |
798 | /* Return the frame which we can use to evaluate the expression | |
799 | whose valid block is valid_block, or NULL if not in scope. | |
800 | ||
801 | This whole concept is probably not the way to do things (it is incredibly | |
802 | slow being the main reason, not to mention fragile (e.g. the sparc | |
803 | frame pointer being fetched as 0 bug causes it to stop)). Instead, | |
804 | introduce a version of "struct frame" which survives over calls to the | |
805 | inferior, but which is better than FRAME_ADDR in the sense that it lets | |
806 | us evaluate expressions relative to that frame (on some machines, it | |
807 | can just be a FRAME_ADDR). Save one of those instead of (or in addition | |
808 | to) the exp_valid_block, and then use it to evaluate the watchpoint | |
809 | expression, with no need to do all this backtracing every time. | |
810 | ||
811 | Or better yet, what if it just copied the struct frame and its next | |
812 | frame? Off the top of my head, I would think that would work | |
813 | because things like (a29k) rsize and msize, or (sparc) bottom just | |
814 | depend on the frame, and aren't going to be different just because | |
815 | the inferior has done something. Trying to recalculate them | |
816 | strikes me as a lot of work, possibly even impossible. Saving the | |
817 | next frame is needed at least on a29k, where get_saved_register | |
818 | uses fi->next->saved_msp. For figuring out whether that frame is | |
819 | still on the stack, I guess this needs to be machine-specific (e.g. | |
820 | a29k) but I think | |
821 | ||
fe675038 | 822 | read_fp () INNER_THAN watchpoint_frame->frame |
fa99ebe1 JK |
823 | |
824 | would generally work. | |
825 | ||
826 | Of course the scope of the expression could be less than a whole | |
827 | function; perhaps if the innermost frame is the one which the | |
828 | watchpoint is relative to (another machine-specific thing, usually | |
829 | ||
830 | FRAMELESS_FUNCTION_INVOCATION (get_current_frame(), fromleaf) | |
fe675038 | 831 | read_fp () == wp_frame->frame |
fa99ebe1 JK |
832 | && !fromleaf |
833 | ||
834 | ), *then* it could do a | |
835 | ||
836 | contained_in (get_current_block (), wp->exp_valid_block). | |
837 | ||
838 | */ | |
839 | ||
840 | FRAME | |
841 | within_scope (valid_block) | |
842 | struct block *valid_block; | |
843 | { | |
844 | FRAME fr = get_current_frame (); | |
845 | struct frame_info *fi = get_frame_info (fr); | |
846 | CORE_ADDR func_start; | |
847 | ||
848 | /* If caller_pc_valid is true, we are stepping through | |
849 | a function prologue, which is bounded by callee_func_start | |
850 | (inclusive) and callee_prologue_end (exclusive). | |
851 | caller_pc is the pc of the caller. | |
852 | ||
853 | Yes, this is hairy. */ | |
854 | static int caller_pc_valid = 0; | |
855 | static CORE_ADDR caller_pc; | |
856 | static CORE_ADDR callee_func_start; | |
857 | static CORE_ADDR callee_prologue_end; | |
858 | ||
f1ed4330 | 859 | find_pc_partial_function (fi->pc, (PTR)NULL, &func_start, (CORE_ADDR *)NULL); |
fa99ebe1 JK |
860 | func_start += FUNCTION_START_OFFSET; |
861 | if (fi->pc == func_start) | |
862 | { | |
863 | /* We just called a function. The only other case I | |
864 | can think of where the pc would equal the pc of the | |
865 | start of a function is a frameless function (i.e. | |
866 | no prologue) where we branch back to the start | |
867 | of the function. In that case, SKIP_PROLOGUE won't | |
868 | find one, and we'll clear caller_pc_valid a few lines | |
869 | down. */ | |
870 | caller_pc_valid = 1; | |
871 | caller_pc = SAVED_PC_AFTER_CALL (fr); | |
872 | callee_func_start = func_start; | |
873 | SKIP_PROLOGUE (func_start); | |
874 | callee_prologue_end = func_start; | |
875 | } | |
876 | if (caller_pc_valid) | |
877 | { | |
878 | if (fi->pc < callee_func_start | |
879 | || fi->pc >= callee_prologue_end) | |
880 | caller_pc_valid = 0; | |
881 | } | |
882 | ||
883 | if (contained_in (block_for_pc (caller_pc_valid | |
884 | ? caller_pc | |
885 | : fi->pc), | |
886 | valid_block)) | |
887 | { | |
888 | return fr; | |
889 | } | |
890 | fr = get_prev_frame (fr); | |
891 | ||
892 | /* If any active frame is in the exp_valid_block, then it's | |
893 | OK. Note that this might not be the same invocation of | |
894 | the exp_valid_block that we were watching a little while | |
895 | ago, or the same one as when the watchpoint was set (e.g. | |
896 | we are watching a local variable in a recursive function. | |
897 | When we return from a recursive invocation, then we are | |
898 | suddenly watching a different instance of the variable). | |
899 | ||
900 | At least for now I am going to consider this a feature. */ | |
901 | for (; fr != NULL; fr = get_prev_frame (fr)) | |
902 | { | |
903 | fi = get_frame_info (fr); | |
904 | if (contained_in (block_for_pc (fi->pc), | |
905 | valid_block)) | |
906 | { | |
907 | return fr; | |
908 | } | |
909 | } | |
910 | return NULL; | |
911 | } | |
bd5635a1 | 912 | |
8af68e4e JK |
913 | /* Possible return values for watchpoint_check (this can't be an enum |
914 | because of check_errors). */ | |
915 | /* The watchpoint has been disabled. */ | |
916 | #define WP_DISABLED 1 | |
917 | /* The value has changed. */ | |
918 | #define WP_VALUE_CHANGED 2 | |
919 | /* The value has not changed. */ | |
920 | #define WP_VALUE_NOT_CHANGED 3 | |
921 | ||
922 | /* Check watchpoint condition. */ | |
923 | static int | |
924 | watchpoint_check (p) | |
fe675038 | 925 | char *p; |
8af68e4e JK |
926 | { |
927 | bpstat bs = (bpstat) p; | |
fa99ebe1 | 928 | FRAME fr; |
8af68e4e JK |
929 | |
930 | int within_current_scope; | |
fa99ebe1 | 931 | if (bs->breakpoint_at->exp_valid_block == NULL) |
8af68e4e | 932 | within_current_scope = 1; |
fa99ebe1 JK |
933 | else |
934 | { | |
935 | fr = within_scope (bs->breakpoint_at->exp_valid_block); | |
936 | within_current_scope = fr != NULL; | |
937 | if (within_current_scope) | |
938 | /* If we end up stopping, the current frame will get selected | |
939 | in normal_stop. So this call to select_frame won't affect | |
940 | the user. */ | |
941 | select_frame (fr, -1); | |
942 | } | |
943 | ||
8af68e4e JK |
944 | if (within_current_scope) |
945 | { | |
946 | /* We use value_{,free_to_}mark because it could be a | |
947 | *long* time before we return to the command level and | |
cef4c2e7 PS |
948 | call free_all_values. We can't call free_all_values because |
949 | we might be in the middle of evaluating a function call. */ | |
8af68e4e JK |
950 | |
951 | value mark = value_mark (); | |
952 | value new_val = evaluate_expression (bs->breakpoint_at->exp); | |
953 | if (!value_equal (bs->breakpoint_at->val, new_val)) | |
954 | { | |
955 | release_value (new_val); | |
956 | value_free_to_mark (mark); | |
957 | bs->old_val = bs->breakpoint_at->val; | |
958 | bs->breakpoint_at->val = new_val; | |
959 | /* We will stop here */ | |
960 | return WP_VALUE_CHANGED; | |
961 | } | |
962 | else | |
963 | { | |
964 | /* Nothing changed, don't do anything. */ | |
965 | value_free_to_mark (mark); | |
966 | /* We won't stop here */ | |
967 | return WP_VALUE_NOT_CHANGED; | |
968 | } | |
969 | } | |
970 | else | |
971 | { | |
972 | /* This seems like the only logical thing to do because | |
973 | if we temporarily ignored the watchpoint, then when | |
974 | we reenter the block in which it is valid it contains | |
975 | garbage (in the case of a function, it may have two | |
976 | garbage values, one before and one after the prologue). | |
977 | So we can't even detect the first assignment to it and | |
978 | watch after that (since the garbage may or may not equal | |
979 | the first value assigned). */ | |
980 | bs->breakpoint_at->enable = disabled; | |
981 | printf_filtered ("\ | |
982 | Watchpoint %d disabled because the program has left the block in\n\ | |
983 | which its expression is valid.\n", bs->breakpoint_at->number); | |
984 | return WP_DISABLED; | |
985 | } | |
986 | } | |
987 | ||
988 | /* This is used when everything which needs to be printed has | |
989 | already been printed. But we still want to print the frame. */ | |
990 | static int | |
cabd4da6 | 991 | print_it_done (bs) |
8af68e4e JK |
992 | bpstat bs; |
993 | { | |
994 | return 0; | |
995 | } | |
996 | ||
cabd4da6 JK |
997 | /* This is used when nothing should be printed for this bpstat entry. */ |
998 | ||
999 | static int | |
1000 | print_it_noop (bs) | |
1001 | bpstat bs; | |
1002 | { | |
1003 | return -1; | |
1004 | } | |
1005 | ||
cb6b0202 JK |
1006 | /* Get a bpstat associated with having just stopped at address *PC |
1007 | and frame address FRAME_ADDRESS. Update *PC to point at the | |
1008 | breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero | |
1009 | if this is known to not be a real breakpoint (it could still be a | |
1010 | watchpoint, though). */ | |
1011 | ||
bd5635a1 RP |
1012 | /* Determine whether we stopped at a breakpoint, etc, or whether we |
1013 | don't understand this stop. Result is a chain of bpstat's such that: | |
1014 | ||
1015 | if we don't understand the stop, the result is a null pointer. | |
1016 | ||
cb6b0202 | 1017 | if we understand why we stopped, the result is not null. |
bd5635a1 RP |
1018 | |
1019 | Each element of the chain refers to a particular breakpoint or | |
1020 | watchpoint at which we have stopped. (We may have stopped for | |
2d313932 | 1021 | several reasons concurrently.) |
bd5635a1 RP |
1022 | |
1023 | Each element of the chain has valid next, breakpoint_at, | |
1024 | commands, FIXME??? fields. | |
1025 | ||
1026 | */ | |
1027 | ||
bd5635a1 | 1028 | bpstat |
cb6b0202 | 1029 | bpstat_stop_status (pc, frame_address, not_a_breakpoint) |
bd5635a1 RP |
1030 | CORE_ADDR *pc; |
1031 | FRAME_ADDR frame_address; | |
cb6b0202 | 1032 | int not_a_breakpoint; |
bd5635a1 RP |
1033 | { |
1034 | register struct breakpoint *b; | |
bd5635a1 | 1035 | CORE_ADDR bp_addr; |
bdbd5f50 | 1036 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1037 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ |
1038 | int real_breakpoint = 0; | |
bdbd5f50 | 1039 | #endif |
bd5635a1 | 1040 | /* Root of the chain of bpstat's */ |
cba0d141 | 1041 | struct bpstat root_bs[1]; |
bd5635a1 RP |
1042 | /* Pointer to the last thing in the chain currently. */ |
1043 | bpstat bs = root_bs; | |
1044 | ||
1045 | /* Get the address where the breakpoint would have been. */ | |
1046 | bp_addr = *pc - DECR_PC_AFTER_BREAK; | |
1047 | ||
1048 | ALL_BREAKPOINTS (b) | |
1049 | { | |
bd5635a1 RP |
1050 | if (b->enable == disabled) |
1051 | continue; | |
30875e1c SG |
1052 | |
1053 | if (b->type != bp_watchpoint && b->address != bp_addr) | |
bd5635a1 RP |
1054 | continue; |
1055 | ||
cb6b0202 JK |
1056 | if (b->type != bp_watchpoint && not_a_breakpoint) |
1057 | continue; | |
1058 | ||
30875e1c SG |
1059 | /* Come here if it's a watchpoint, or if the break address matches */ |
1060 | ||
bd5635a1 RP |
1061 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ |
1062 | ||
cabd4da6 JK |
1063 | bs->stop = 1; |
1064 | bs->print = 1; | |
bd5635a1 | 1065 | |
30875e1c | 1066 | if (b->type == bp_watchpoint) |
bd5635a1 | 1067 | { |
8af68e4e JK |
1068 | static char message1[] = |
1069 | "Error evaluating expression for watchpoint %d\n"; | |
1070 | char message[sizeof (message1) + 30 /* slop */]; | |
1071 | sprintf (message, message1, b->number); | |
fe675038 JK |
1072 | switch (catch_errors (watchpoint_check, (char *) bs, message, |
1073 | RETURN_MASK_ALL)) | |
bd5635a1 | 1074 | { |
8af68e4e JK |
1075 | case WP_DISABLED: |
1076 | /* We've already printed what needs to be printed. */ | |
cabd4da6 | 1077 | bs->print_it = print_it_done; |
8af68e4e JK |
1078 | /* Stop. */ |
1079 | break; | |
1080 | case WP_VALUE_CHANGED: | |
1081 | /* Stop. */ | |
1082 | break; | |
1083 | case WP_VALUE_NOT_CHANGED: | |
1084 | /* Don't stop. */ | |
cabd4da6 JK |
1085 | bs->print_it = print_it_noop; |
1086 | bs->stop = 0; | |
bd5635a1 | 1087 | continue; |
8af68e4e JK |
1088 | default: |
1089 | /* Can't happen. */ | |
1090 | /* FALLTHROUGH */ | |
1091 | case 0: | |
1092 | /* Error from catch_errors. */ | |
1093 | b->enable = disabled; | |
1094 | printf_filtered ("Watchpoint %d disabled.\n", b->number); | |
1095 | /* We've already printed what needs to be printed. */ | |
cabd4da6 | 1096 | bs->print_it = print_it_done; |
8af68e4e JK |
1097 | /* Stop. */ |
1098 | break; | |
bd5635a1 RP |
1099 | } |
1100 | } | |
bdbd5f50 | 1101 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1102 | else |
1103 | real_breakpoint = 1; | |
bdbd5f50 | 1104 | #endif |
bd5635a1 RP |
1105 | |
1106 | if (b->frame && b->frame != frame_address) | |
cabd4da6 | 1107 | bs->stop = 0; |
bd5635a1 RP |
1108 | else |
1109 | { | |
fee933f1 | 1110 | int value_is_zero = 0; |
bd5635a1 RP |
1111 | |
1112 | if (b->cond) | |
1113 | { | |
1114 | /* Need to select the frame, with all that implies | |
1115 | so that the conditions will have the right context. */ | |
1116 | select_frame (get_current_frame (), 0); | |
bdbd5f50 JG |
1117 | value_is_zero |
1118 | = catch_errors (breakpoint_cond_eval, (char *)(b->cond), | |
fe675038 JK |
1119 | "Error in testing breakpoint condition:\n", |
1120 | RETURN_MASK_ALL); | |
06b6c733 | 1121 | /* FIXME-someday, should give breakpoint # */ |
bd5635a1 RP |
1122 | free_all_values (); |
1123 | } | |
bdbd5f50 | 1124 | if (b->cond && value_is_zero) |
bd5635a1 | 1125 | { |
cabd4da6 | 1126 | bs->stop = 0; |
bd5635a1 RP |
1127 | } |
1128 | else if (b->ignore_count > 0) | |
1129 | { | |
1130 | b->ignore_count--; | |
cabd4da6 | 1131 | bs->stop = 0; |
bd5635a1 RP |
1132 | } |
1133 | else | |
1134 | { | |
1135 | /* We will stop here */ | |
30875e1c | 1136 | if (b->disposition == disable) |
bd5635a1 RP |
1137 | b->enable = disabled; |
1138 | bs->commands = b->commands; | |
1139 | if (b->silent) | |
cabd4da6 | 1140 | bs->print = 0; |
2d313932 | 1141 | if (bs->commands && STREQ ("silent", bs->commands->line)) |
bd5635a1 RP |
1142 | { |
1143 | bs->commands = bs->commands->next; | |
cabd4da6 | 1144 | bs->print = 0; |
bd5635a1 RP |
1145 | } |
1146 | } | |
1147 | } | |
cabd4da6 JK |
1148 | /* Print nothing for this entry if we dont stop or if we dont print. */ |
1149 | if (bs->stop == 0 || bs->print == 0) | |
1150 | bs->print_it = print_it_noop; | |
bd5635a1 RP |
1151 | } |
1152 | ||
1153 | bs->next = NULL; /* Terminate the chain */ | |
1154 | bs = root_bs->next; /* Re-grab the head of the chain */ | |
cabd4da6 | 1155 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1156 | if (bs) |
1157 | { | |
bd5635a1 RP |
1158 | if (real_breakpoint) |
1159 | { | |
1160 | *pc = bp_addr; | |
1161 | #if defined (SHIFT_INST_REGS) | |
817ac7f8 | 1162 | SHIFT_INST_REGS(); |
bd5635a1 RP |
1163 | #else /* No SHIFT_INST_REGS. */ |
1164 | write_pc (bp_addr); | |
1165 | #endif /* No SHIFT_INST_REGS. */ | |
1166 | } | |
bd5635a1 | 1167 | } |
cabd4da6 | 1168 | #endif /* DECR_PC_AFTER_BREAK != 0. */ |
bd5635a1 RP |
1169 | return bs; |
1170 | } | |
cabd4da6 JK |
1171 | \f |
1172 | /* Tell what to do about this bpstat. */ | |
fe675038 | 1173 | struct bpstat_what |
cabd4da6 JK |
1174 | bpstat_what (bs) |
1175 | bpstat bs; | |
1176 | { | |
1177 | /* Classify each bpstat as one of the following. */ | |
1178 | enum class { | |
fe675038 JK |
1179 | /* This bpstat element has no effect on the main_action. */ |
1180 | no_effect = 0, | |
cabd4da6 JK |
1181 | |
1182 | /* There was a watchpoint, stop but don't print. */ | |
1183 | wp_silent, | |
1184 | ||
1185 | /* There was a watchpoint, stop and print. */ | |
1186 | wp_noisy, | |
1187 | ||
1188 | /* There was a breakpoint but we're not stopping. */ | |
1189 | bp_nostop, | |
1190 | ||
1191 | /* There was a breakpoint, stop but don't print. */ | |
1192 | bp_silent, | |
1193 | ||
1194 | /* There was a breakpoint, stop and print. */ | |
1195 | bp_noisy, | |
1196 | ||
1197 | /* We hit the longjmp breakpoint. */ | |
1198 | long_jump, | |
1199 | ||
1200 | /* We hit the longjmp_resume breakpoint. */ | |
1201 | long_resume, | |
1202 | ||
1203 | /* This is just used to count how many enums there are. */ | |
1204 | class_last | |
1205 | }; | |
1206 | ||
1207 | /* Here is the table which drives this routine. So that we can | |
1208 | format it pretty, we define some abbreviations for the | |
1209 | enum bpstat_what codes. */ | |
1210 | #define keep_c BPSTAT_WHAT_KEEP_CHECKING | |
1211 | #define stop_s BPSTAT_WHAT_STOP_SILENT | |
1212 | #define stop_n BPSTAT_WHAT_STOP_NOISY | |
1213 | #define single BPSTAT_WHAT_SINGLE | |
1214 | #define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME | |
1215 | #define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME | |
1216 | #define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE | |
1217 | /* "Can't happen." Might want to print an error message. | |
1218 | abort() is not out of the question, but chances are GDB is just | |
1219 | a bit confused, not unusable. */ | |
1220 | #define err BPSTAT_WHAT_STOP_NOISY | |
1221 | ||
1222 | /* Given an old action and a class, come up with a new action. */ | |
84d59861 JK |
1223 | /* One interesting property of this table is that wp_silent is the same |
1224 | as bp_silent and wp_noisy is the same as bp_noisy. That is because | |
1225 | after stopping, the check for whether to step over a breakpoint | |
1226 | (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without | |
1227 | reference to how we stopped. We retain separate wp_silent and bp_silent | |
1228 | codes in case we want to change that someday. */ | |
fe675038 | 1229 | static const enum bpstat_what_main_action |
cabd4da6 JK |
1230 | table[(int)class_last][(int)BPSTAT_WHAT_LAST] = |
1231 | { | |
1232 | /* old action */ | |
1233 | /* keep_c stop_s stop_n single setlr clrlr clrlrs */ | |
1234 | ||
fe675038 | 1235 | /*no_effect*/ {keep_c, stop_s, stop_n, single, setlr , clrlr , clrlrs}, |
cabd4da6 JK |
1236 | /*wp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s}, |
1237 | /*wp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n}, | |
1238 | /*bp_nostop*/ {single, stop_s, stop_n, single, setlr , clrlrs, clrlrs}, | |
1239 | /*bp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s}, | |
1240 | /*bp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n}, | |
1241 | /*long_jump*/ {setlr , stop_s, stop_n, setlr , err , err , err }, | |
1242 | /*long_resume*/ {clrlr , stop_s, stop_n, clrlrs, err , err , err } | |
1243 | }; | |
1244 | #undef keep_c | |
1245 | #undef stop_s | |
1246 | #undef stop_n | |
1247 | #undef single | |
1248 | #undef setlr | |
1249 | #undef clrlr | |
1250 | #undef clrlrs | |
1251 | #undef err | |
fe675038 | 1252 | enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; |
84d59861 | 1253 | struct bpstat_what retval; |
cabd4da6 | 1254 | |
cef4c2e7 PS |
1255 | retval.call_dummy = 0; |
1256 | retval.step_resume = 0; | |
cabd4da6 JK |
1257 | for (; bs != NULL; bs = bs->next) |
1258 | { | |
fee933f1 | 1259 | enum class bs_class = no_effect; |
cabd4da6 JK |
1260 | if (bs->breakpoint_at == NULL) |
1261 | /* I suspect this can happen if it was a momentary breakpoint | |
1262 | which has since been deleted. */ | |
1263 | continue; | |
1264 | switch (bs->breakpoint_at->type) | |
1265 | { | |
1266 | case bp_breakpoint: | |
1267 | case bp_until: | |
1268 | case bp_finish: | |
1269 | if (bs->stop) | |
1270 | { | |
1271 | if (bs->print) | |
1272 | bs_class = bp_noisy; | |
1273 | else | |
1274 | bs_class = bp_silent; | |
1275 | } | |
1276 | else | |
1277 | bs_class = bp_nostop; | |
1278 | break; | |
1279 | case bp_watchpoint: | |
1280 | if (bs->stop) | |
1281 | { | |
1282 | if (bs->print) | |
1283 | bs_class = wp_noisy; | |
1284 | else | |
1285 | bs_class = wp_silent; | |
1286 | } | |
1287 | else | |
fe675038 JK |
1288 | /* There was a watchpoint, but we're not stopping. This requires |
1289 | no further action. */ | |
1290 | bs_class = no_effect; | |
cabd4da6 JK |
1291 | break; |
1292 | case bp_longjmp: | |
1293 | bs_class = long_jump; | |
1294 | break; | |
1295 | case bp_longjmp_resume: | |
1296 | bs_class = long_resume; | |
1297 | break; | |
fe675038 JK |
1298 | case bp_step_resume: |
1299 | #if 0 | |
1300 | /* Need to temporarily disable this until we can fix the bug | |
1301 | with nexting over a breakpoint with ->stop clear causing | |
1302 | an infinite loop. For now, treat the breakpoint as having | |
1303 | been hit even if the frame is wrong. */ | |
1304 | if (bs->stop) | |
1305 | { | |
1306 | #endif | |
84d59861 | 1307 | retval.step_resume = 1; |
fe675038 JK |
1308 | /* We don't handle this via the main_action. */ |
1309 | bs_class = no_effect; | |
1310 | #if 0 | |
1311 | } | |
1312 | else | |
1313 | /* It is for the wrong frame. */ | |
1314 | bs_class = bp_nostop; | |
1315 | #endif | |
1316 | break; | |
84d59861 JK |
1317 | case bp_call_dummy: |
1318 | /* Make sure the action is stop (silent or noisy), so infrun.c | |
1319 | pops the dummy frame. */ | |
1320 | bs_class = bp_silent; | |
1321 | retval.call_dummy = 1; | |
bb7b3800 | 1322 | break; |
cabd4da6 JK |
1323 | } |
1324 | current_action = table[(int)bs_class][(int)current_action]; | |
1325 | } | |
84d59861 JK |
1326 | retval.main_action = current_action; |
1327 | return retval; | |
cabd4da6 | 1328 | } |
bd5635a1 | 1329 | |
30875e1c SG |
1330 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
1331 | without hardware support). This isn't related to a specific bpstat, | |
1332 | just to things like whether watchpoints are set. */ | |
1333 | ||
bd5635a1 RP |
1334 | int |
1335 | bpstat_should_step () | |
1336 | { | |
1337 | struct breakpoint *b; | |
1338 | ALL_BREAKPOINTS (b) | |
30875e1c | 1339 | if (b->enable == enabled && b->type == bp_watchpoint) |
bd5635a1 RP |
1340 | return 1; |
1341 | return 0; | |
1342 | } | |
1343 | \f | |
1344 | /* Print information on breakpoint number BNUM, or -1 if all. | |
1345 | If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS | |
1346 | is nonzero, process only watchpoints. */ | |
1347 | ||
1348 | static void | |
c8950965 | 1349 | breakpoint_1 (bnum, allflag) |
bd5635a1 | 1350 | int bnum; |
80ba48f5 | 1351 | int allflag; |
bd5635a1 RP |
1352 | { |
1353 | register struct breakpoint *b; | |
1354 | register struct command_line *l; | |
1355 | register struct symbol *sym; | |
1356 | CORE_ADDR last_addr = (CORE_ADDR)-1; | |
30875e1c SG |
1357 | int found_a_breakpoint = 0; |
1358 | static char *bptypes[] = {"breakpoint", "until", "finish", "watchpoint", | |
bb7b3800 JK |
1359 | "longjmp", "longjmp resume", "step resume", |
1360 | "call dummy" }; | |
80ba48f5 | 1361 | static char *bpdisps[] = {"del", "dis", "keep"}; |
30875e1c | 1362 | static char bpenables[] = "ny"; |
0a62ff36 | 1363 | char wrap_indent[80]; |
30875e1c | 1364 | |
bd5635a1 | 1365 | ALL_BREAKPOINTS (b) |
30875e1c SG |
1366 | if (bnum == -1 |
1367 | || bnum == b->number) | |
bd5635a1 | 1368 | { |
80ba48f5 SG |
1369 | /* We only print out user settable breakpoints unless the allflag is set. */ |
1370 | if (!allflag | |
1371 | && b->type != bp_breakpoint | |
1372 | && b->type != bp_watchpoint) | |
1373 | continue; | |
1374 | ||
30875e1c | 1375 | if (!found_a_breakpoint++) |
80ba48f5 | 1376 | printf_filtered ("Num Type Disp Enb %sWhat\n", |
30875e1c SG |
1377 | addressprint ? "Address " : ""); |
1378 | ||
80ba48f5 | 1379 | printf_filtered ("%-3d %-14s %-4s %-3c ", |
30875e1c | 1380 | b->number, |
423e9664 SG |
1381 | bptypes[(int)b->type], |
1382 | bpdisps[(int)b->disposition], | |
1383 | bpenables[(int)b->enable]); | |
0a62ff36 JK |
1384 | strcpy (wrap_indent, " "); |
1385 | if (addressprint) | |
1386 | strcat (wrap_indent, " "); | |
30875e1c | 1387 | switch (b->type) |
bd5635a1 | 1388 | { |
30875e1c SG |
1389 | case bp_watchpoint: |
1390 | print_expression (b->exp, stdout); | |
1391 | break; | |
84d59861 | 1392 | |
30875e1c | 1393 | case bp_breakpoint: |
80ba48f5 SG |
1394 | case bp_until: |
1395 | case bp_finish: | |
1396 | case bp_longjmp: | |
1397 | case bp_longjmp_resume: | |
84d59861 | 1398 | case bp_step_resume: |
bb7b3800 | 1399 | case bp_call_dummy: |
bd5635a1 | 1400 | if (addressprint) |
cef4c2e7 | 1401 | printf_filtered ("%s ", local_hex_string_custom ((unsigned long) b->address, "08l")); |
bd5635a1 RP |
1402 | |
1403 | last_addr = b->address; | |
d889f6b7 | 1404 | if (b->source_file) |
bd5635a1 RP |
1405 | { |
1406 | sym = find_pc_function (b->address); | |
1407 | if (sym) | |
1408 | { | |
30875e1c | 1409 | fputs_filtered ("in ", stdout); |
2d313932 | 1410 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), stdout); |
0a62ff36 | 1411 | wrap_here (wrap_indent); |
bd5635a1 RP |
1412 | fputs_filtered (" at ", stdout); |
1413 | } | |
d889f6b7 | 1414 | fputs_filtered (b->source_file, stdout); |
bd5635a1 RP |
1415 | printf_filtered (":%d", b->line_number); |
1416 | } | |
1417 | else | |
bdbd5f50 | 1418 | print_address_symbolic (b->address, stdout, demangle, " "); |
fee933f1 | 1419 | break; |
bd5635a1 RP |
1420 | } |
1421 | ||
1422 | printf_filtered ("\n"); | |
1423 | ||
1424 | if (b->frame) | |
d3b9c0df | 1425 | printf_filtered ("\tstop only in stack frame at %s\n", |
cef4c2e7 | 1426 | local_hex_string((unsigned long) b->frame)); |
bd5635a1 RP |
1427 | if (b->cond) |
1428 | { | |
1429 | printf_filtered ("\tstop only if "); | |
1430 | print_expression (b->cond, stdout); | |
1431 | printf_filtered ("\n"); | |
1432 | } | |
1433 | if (b->ignore_count) | |
1434 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); | |
1435 | if ((l = b->commands)) | |
1436 | while (l) | |
1437 | { | |
1438 | fputs_filtered ("\t", stdout); | |
1439 | fputs_filtered (l->line, stdout); | |
1440 | fputs_filtered ("\n", stdout); | |
1441 | l = l->next; | |
1442 | } | |
1443 | } | |
1444 | ||
fee933f1 RP |
1445 | if (!found_a_breakpoint) |
1446 | { | |
1447 | if (bnum == -1) | |
1448 | printf_filtered ("No breakpoints or watchpoints.\n"); | |
1449 | else | |
1450 | printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum); | |
1451 | } | |
30875e1c SG |
1452 | else |
1453 | /* Compare against (CORE_ADDR)-1 in case some compiler decides | |
1454 | that a comparison of an unsigned with -1 is always false. */ | |
1455 | if (last_addr != (CORE_ADDR)-1) | |
1456 | set_next_address (last_addr); | |
bd5635a1 RP |
1457 | } |
1458 | ||
bdbd5f50 | 1459 | /* ARGSUSED */ |
bd5635a1 RP |
1460 | static void |
1461 | breakpoints_info (bnum_exp, from_tty) | |
1462 | char *bnum_exp; | |
1463 | int from_tty; | |
1464 | { | |
1465 | int bnum = -1; | |
1466 | ||
1467 | if (bnum_exp) | |
1468 | bnum = parse_and_eval_address (bnum_exp); | |
1469 | ||
c8950965 | 1470 | breakpoint_1 (bnum, 0); |
80ba48f5 SG |
1471 | } |
1472 | ||
9b280a7f JG |
1473 | #if MAINTENANCE_CMDS |
1474 | ||
80ba48f5 SG |
1475 | /* ARGSUSED */ |
1476 | static void | |
9b280a7f | 1477 | maintenance_info_breakpoints (bnum_exp, from_tty) |
80ba48f5 SG |
1478 | char *bnum_exp; |
1479 | int from_tty; | |
1480 | { | |
1481 | int bnum = -1; | |
1482 | ||
1483 | if (bnum_exp) | |
1484 | bnum = parse_and_eval_address (bnum_exp); | |
1485 | ||
c8950965 | 1486 | breakpoint_1 (bnum, 1); |
bd5635a1 RP |
1487 | } |
1488 | ||
9b280a7f JG |
1489 | #endif |
1490 | ||
bd5635a1 RP |
1491 | /* Print a message describing any breakpoints set at PC. */ |
1492 | ||
1493 | static void | |
1494 | describe_other_breakpoints (pc) | |
1495 | register CORE_ADDR pc; | |
1496 | { | |
1497 | register int others = 0; | |
1498 | register struct breakpoint *b; | |
1499 | ||
1500 | ALL_BREAKPOINTS (b) | |
1501 | if (b->address == pc) | |
1502 | others++; | |
1503 | if (others > 0) | |
1504 | { | |
2d313932 | 1505 | printf ("Note: breakpoint%s ", (others > 1) ? "s" : ""); |
bd5635a1 RP |
1506 | ALL_BREAKPOINTS (b) |
1507 | if (b->address == pc) | |
1508 | { | |
1509 | others--; | |
2d313932 JK |
1510 | printf ("%d%s%s ", |
1511 | b->number, | |
1512 | (b->enable == disabled) ? " (disabled)" : "", | |
1513 | (others > 1) ? "," : ((others == 1) ? " and" : "")); | |
bd5635a1 | 1514 | } |
cef4c2e7 | 1515 | printf ("also set at pc %s.\n", local_hex_string((unsigned long) pc)); |
bd5635a1 RP |
1516 | } |
1517 | } | |
1518 | \f | |
1519 | /* Set the default place to put a breakpoint | |
1520 | for the `break' command with no arguments. */ | |
1521 | ||
1522 | void | |
1523 | set_default_breakpoint (valid, addr, symtab, line) | |
1524 | int valid; | |
1525 | CORE_ADDR addr; | |
1526 | struct symtab *symtab; | |
1527 | int line; | |
1528 | { | |
1529 | default_breakpoint_valid = valid; | |
1530 | default_breakpoint_address = addr; | |
1531 | default_breakpoint_symtab = symtab; | |
1532 | default_breakpoint_line = line; | |
1533 | } | |
1534 | ||
1535 | /* Rescan breakpoints at address ADDRESS, | |
1536 | marking the first one as "first" and any others as "duplicates". | |
1537 | This is so that the bpt instruction is only inserted once. */ | |
1538 | ||
1539 | static void | |
1540 | check_duplicates (address) | |
1541 | CORE_ADDR address; | |
1542 | { | |
1543 | register struct breakpoint *b; | |
1544 | register int count = 0; | |
1545 | ||
30875e1c | 1546 | if (address == 0) /* Watchpoints are uninteresting */ |
f266e564 JK |
1547 | return; |
1548 | ||
bd5635a1 RP |
1549 | ALL_BREAKPOINTS (b) |
1550 | if (b->enable != disabled && b->address == address) | |
1551 | { | |
1552 | count++; | |
1553 | b->duplicate = count > 1; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | /* Low level routine to set a breakpoint. | |
1558 | Takes as args the three things that every breakpoint must have. | |
1559 | Returns the breakpoint object so caller can set other things. | |
1560 | Does not set the breakpoint number! | |
f266e564 JK |
1561 | Does not print anything. |
1562 | ||
1563 | ==> This routine should not be called if there is a chance of later | |
1564 | error(); otherwise it leaves a bogus breakpoint on the chain. Validate | |
1565 | your arguments BEFORE calling this routine! */ | |
bd5635a1 RP |
1566 | |
1567 | static struct breakpoint * | |
1568 | set_raw_breakpoint (sal) | |
1569 | struct symtab_and_line sal; | |
1570 | { | |
1571 | register struct breakpoint *b, *b1; | |
1572 | ||
1573 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); | |
4ed3a9ea | 1574 | memset (b, 0, sizeof (*b)); |
bd5635a1 | 1575 | b->address = sal.pc; |
d889f6b7 JK |
1576 | if (sal.symtab == NULL) |
1577 | b->source_file = NULL; | |
1578 | else | |
1579 | b->source_file = savestring (sal.symtab->filename, | |
1580 | strlen (sal.symtab->filename)); | |
bd5635a1 RP |
1581 | b->line_number = sal.line; |
1582 | b->enable = enabled; | |
1583 | b->next = 0; | |
1584 | b->silent = 0; | |
1585 | b->ignore_count = 0; | |
1586 | b->commands = NULL; | |
30875e1c | 1587 | b->frame = 0; |
bd5635a1 RP |
1588 | |
1589 | /* Add this breakpoint to the end of the chain | |
1590 | so that a list of breakpoints will come out in order | |
1591 | of increasing numbers. */ | |
1592 | ||
1593 | b1 = breakpoint_chain; | |
1594 | if (b1 == 0) | |
1595 | breakpoint_chain = b; | |
1596 | else | |
1597 | { | |
1598 | while (b1->next) | |
1599 | b1 = b1->next; | |
1600 | b1->next = b; | |
1601 | } | |
1602 | ||
1603 | check_duplicates (sal.pc); | |
1604 | ||
1605 | return b; | |
1606 | } | |
1607 | ||
30875e1c | 1608 | static void |
80ba48f5 | 1609 | create_longjmp_breakpoint(func_name) |
30875e1c | 1610 | char *func_name; |
30875e1c | 1611 | { |
30875e1c SG |
1612 | struct symtab_and_line sal; |
1613 | struct breakpoint *b; | |
80ba48f5 | 1614 | static int internal_breakpoint_number = -1; |
30875e1c | 1615 | |
30875e1c SG |
1616 | if (func_name != NULL) |
1617 | { | |
1618 | struct minimal_symbol *m; | |
1619 | ||
1620 | m = lookup_minimal_symbol(func_name, (struct objfile *)NULL); | |
1621 | if (m) | |
2d313932 | 1622 | sal.pc = SYMBOL_VALUE_ADDRESS (m); |
30875e1c SG |
1623 | else |
1624 | return; | |
1625 | } | |
1626 | else | |
1627 | sal.pc = 0; | |
1628 | ||
1629 | sal.symtab = NULL; | |
1630 | sal.line = 0; | |
30875e1c | 1631 | |
80ba48f5 | 1632 | b = set_raw_breakpoint(sal); |
30875e1c SG |
1633 | if (!b) return; |
1634 | ||
80ba48f5 | 1635 | b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume; |
30875e1c SG |
1636 | b->disposition = donttouch; |
1637 | b->enable = disabled; | |
1638 | b->silent = 1; | |
80ba48f5 SG |
1639 | if (func_name) |
1640 | b->addr_string = strsave(func_name); | |
1641 | b->number = internal_breakpoint_number--; | |
30875e1c | 1642 | } |
30875e1c SG |
1643 | |
1644 | /* Call this routine when stepping and nexting to enable a breakpoint if we do | |
1645 | a longjmp(). When we hit that breakpoint, call | |
1646 | set_longjmp_resume_breakpoint() to figure out where we are going. */ | |
1647 | ||
1648 | void | |
1649 | enable_longjmp_breakpoint() | |
1650 | { | |
80ba48f5 SG |
1651 | register struct breakpoint *b; |
1652 | ||
1653 | ALL_BREAKPOINTS (b) | |
1654 | if (b->type == bp_longjmp) | |
9b280a7f JG |
1655 | { |
1656 | b->enable = enabled; | |
1657 | check_duplicates (b->address); | |
1658 | } | |
30875e1c SG |
1659 | } |
1660 | ||
1661 | void | |
1662 | disable_longjmp_breakpoint() | |
1663 | { | |
80ba48f5 SG |
1664 | register struct breakpoint *b; |
1665 | ||
1666 | ALL_BREAKPOINTS (b) | |
9b280a7f | 1667 | if ( b->type == bp_longjmp |
80ba48f5 | 1668 | || b->type == bp_longjmp_resume) |
9b280a7f JG |
1669 | { |
1670 | b->enable = disabled; | |
1671 | check_duplicates (b->address); | |
1672 | } | |
30875e1c SG |
1673 | } |
1674 | ||
1675 | /* Call this after hitting the longjmp() breakpoint. Use this to set a new | |
1676 | breakpoint at the target of the jmp_buf. | |
80ba48f5 SG |
1677 | |
1678 | FIXME - This ought to be done by setting a temporary breakpoint that gets | |
1679 | deleted automatically... | |
30875e1c SG |
1680 | */ |
1681 | ||
1682 | void | |
1683 | set_longjmp_resume_breakpoint(pc, frame) | |
1684 | CORE_ADDR pc; | |
1685 | FRAME frame; | |
1686 | { | |
80ba48f5 SG |
1687 | register struct breakpoint *b; |
1688 | ||
1689 | ALL_BREAKPOINTS (b) | |
1690 | if (b->type == bp_longjmp_resume) | |
1691 | { | |
1692 | b->address = pc; | |
1693 | b->enable = enabled; | |
1694 | if (frame != NULL) | |
1695 | b->frame = FRAME_FP(frame); | |
1696 | else | |
1697 | b->frame = 0; | |
9b280a7f | 1698 | check_duplicates (b->address); |
80ba48f5 SG |
1699 | return; |
1700 | } | |
30875e1c SG |
1701 | } |
1702 | ||
bd5635a1 RP |
1703 | /* Set a breakpoint that will evaporate an end of command |
1704 | at address specified by SAL. | |
1705 | Restrict it to frame FRAME if FRAME is nonzero. */ | |
1706 | ||
30875e1c SG |
1707 | struct breakpoint * |
1708 | set_momentary_breakpoint (sal, frame, type) | |
bd5635a1 RP |
1709 | struct symtab_and_line sal; |
1710 | FRAME frame; | |
30875e1c | 1711 | enum bptype type; |
bd5635a1 RP |
1712 | { |
1713 | register struct breakpoint *b; | |
1714 | b = set_raw_breakpoint (sal); | |
30875e1c SG |
1715 | b->type = type; |
1716 | b->enable = enabled; | |
1717 | b->disposition = donttouch; | |
bd5635a1 | 1718 | b->frame = (frame ? FRAME_FP (frame) : 0); |
30875e1c | 1719 | return b; |
bd5635a1 RP |
1720 | } |
1721 | ||
30875e1c | 1722 | #if 0 |
bd5635a1 RP |
1723 | void |
1724 | clear_momentary_breakpoints () | |
1725 | { | |
1726 | register struct breakpoint *b; | |
1727 | ALL_BREAKPOINTS (b) | |
30875e1c | 1728 | if (b->disposition == delete) |
bd5635a1 RP |
1729 | { |
1730 | delete_breakpoint (b); | |
1731 | break; | |
1732 | } | |
1733 | } | |
30875e1c | 1734 | #endif |
bd5635a1 RP |
1735 | \f |
1736 | /* Tell the user we have just set a breakpoint B. */ | |
1737 | static void | |
1738 | mention (b) | |
1739 | struct breakpoint *b; | |
1740 | { | |
30875e1c | 1741 | switch (b->type) |
bd5635a1 | 1742 | { |
30875e1c | 1743 | case bp_watchpoint: |
bd5635a1 RP |
1744 | printf_filtered ("Watchpoint %d: ", b->number); |
1745 | print_expression (b->exp, stdout); | |
30875e1c SG |
1746 | break; |
1747 | case bp_breakpoint: | |
d3b9c0df | 1748 | printf_filtered ("Breakpoint %d at %s", b->number, |
cef4c2e7 | 1749 | local_hex_string((unsigned long) b->address)); |
d889f6b7 | 1750 | if (b->source_file) |
bd5635a1 | 1751 | printf_filtered (": file %s, line %d.", |
d889f6b7 | 1752 | b->source_file, b->line_number); |
51b57ded FF |
1753 | break; |
1754 | case bp_until: | |
1755 | case bp_finish: | |
1756 | case bp_longjmp: | |
1757 | case bp_longjmp_resume: | |
fee933f1 | 1758 | case bp_step_resume: |
51b57ded | 1759 | break; |
bd5635a1 RP |
1760 | } |
1761 | printf_filtered ("\n"); | |
1762 | } | |
1763 | ||
1764 | #if 0 | |
1765 | /* Nobody calls this currently. */ | |
1766 | /* Set a breakpoint from a symtab and line. | |
1767 | If TEMPFLAG is nonzero, it is a temporary breakpoint. | |
1768 | ADDR_STRING is a malloc'd string holding the name of where we are | |
1769 | setting the breakpoint. This is used later to re-set it after the | |
1770 | program is relinked and symbols are reloaded. | |
1771 | Print the same confirmation messages that the breakpoint command prints. */ | |
1772 | ||
1773 | void | |
1774 | set_breakpoint (s, line, tempflag, addr_string) | |
1775 | struct symtab *s; | |
1776 | int line; | |
1777 | int tempflag; | |
1778 | char *addr_string; | |
1779 | { | |
1780 | register struct breakpoint *b; | |
1781 | struct symtab_and_line sal; | |
1782 | ||
1783 | sal.symtab = s; | |
1784 | sal.line = line; | |
30875e1c SG |
1785 | sal.pc = 0; |
1786 | resolve_sal_pc (&sal); /* Might error out */ | |
1787 | describe_other_breakpoints (sal.pc); | |
bd5635a1 | 1788 | |
30875e1c SG |
1789 | b = set_raw_breakpoint (sal); |
1790 | set_breakpoint_count (breakpoint_count + 1); | |
1791 | b->number = breakpoint_count; | |
1792 | b->type = bp_breakpoint; | |
1793 | b->cond = 0; | |
1794 | b->addr_string = addr_string; | |
1795 | b->enable = enabled; | |
1796 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 | 1797 | |
30875e1c | 1798 | mention (b); |
bd5635a1 | 1799 | } |
30875e1c | 1800 | #endif /* 0 */ |
bd5635a1 RP |
1801 | \f |
1802 | /* Set a breakpoint according to ARG (function, linenum or *address) | |
1803 | and make it temporary if TEMPFLAG is nonzero. */ | |
1804 | ||
1805 | static void | |
1806 | break_command_1 (arg, tempflag, from_tty) | |
1807 | char *arg; | |
1808 | int tempflag, from_tty; | |
1809 | { | |
1810 | struct symtabs_and_lines sals; | |
1811 | struct symtab_and_line sal; | |
1812 | register struct expression *cond = 0; | |
1813 | register struct breakpoint *b; | |
1814 | ||
1815 | /* Pointers in arg to the start, and one past the end, of the condition. */ | |
1816 | char *cond_start = NULL; | |
fee933f1 | 1817 | char *cond_end = NULL; |
bd5635a1 RP |
1818 | /* Pointers in arg to the start, and one past the end, |
1819 | of the address part. */ | |
1820 | char *addr_start = NULL; | |
fee933f1 | 1821 | char *addr_end = NULL; |
d889f6b7 | 1822 | struct cleanup *old_chain; |
fee933f1 | 1823 | struct cleanup *canonical_strings_chain = NULL; |
d889f6b7 | 1824 | char **canonical = (char **)NULL; |
bd5635a1 RP |
1825 | |
1826 | int i; | |
bd5635a1 RP |
1827 | |
1828 | sals.sals = NULL; | |
1829 | sals.nelts = 0; | |
1830 | ||
1831 | sal.line = sal.pc = sal.end = 0; | |
1832 | sal.symtab = 0; | |
1833 | ||
1834 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ | |
1835 | ||
1836 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
1837 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
1838 | { | |
1839 | if (default_breakpoint_valid) | |
1840 | { | |
1841 | sals.sals = (struct symtab_and_line *) | |
1842 | xmalloc (sizeof (struct symtab_and_line)); | |
1843 | sal.pc = default_breakpoint_address; | |
1844 | sal.line = default_breakpoint_line; | |
1845 | sal.symtab = default_breakpoint_symtab; | |
1846 | sals.sals[0] = sal; | |
1847 | sals.nelts = 1; | |
1848 | } | |
1849 | else | |
1850 | error ("No default breakpoint address now."); | |
1851 | } | |
1852 | else | |
1853 | { | |
1854 | addr_start = arg; | |
1855 | ||
1856 | /* Force almost all breakpoints to be in terms of the | |
1857 | current_source_symtab (which is decode_line_1's default). This | |
1858 | should produce the results we want almost all of the time while | |
1859 | leaving default_breakpoint_* alone. */ | |
1860 | if (default_breakpoint_valid | |
1861 | && (!current_source_symtab | |
1862 | || (arg && (*arg == '+' || *arg == '-')))) | |
1863 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
d889f6b7 | 1864 | default_breakpoint_line, &canonical); |
bd5635a1 | 1865 | else |
d889f6b7 | 1866 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical); |
bd5635a1 RP |
1867 | |
1868 | addr_end = arg; | |
1869 | } | |
1870 | ||
1871 | if (! sals.nelts) | |
1872 | return; | |
1873 | ||
d889f6b7 JK |
1874 | /* Make sure that all storage allocated in decode_line_1 gets freed in case |
1875 | the following `for' loop errors out. */ | |
1876 | old_chain = make_cleanup (free, sals.sals); | |
1877 | if (canonical != (char **)NULL) | |
1878 | { | |
1879 | make_cleanup (free, canonical); | |
1880 | canonical_strings_chain = make_cleanup (null_cleanup, 0); | |
1881 | for (i = 0; i < sals.nelts; i++) | |
1882 | { | |
1883 | if (canonical[i] != NULL) | |
1884 | make_cleanup (free, canonical[i]); | |
1885 | } | |
1886 | } | |
1887 | ||
30875e1c SG |
1888 | /* Resolve all line numbers to PC's, and verify that conditions |
1889 | can be parsed, before setting any breakpoints. */ | |
bd5635a1 RP |
1890 | for (i = 0; i < sals.nelts; i++) |
1891 | { | |
30875e1c | 1892 | resolve_sal_pc (&sals.sals[i]); |
bd5635a1 RP |
1893 | |
1894 | while (arg && *arg) | |
1895 | { | |
1896 | if (arg[0] == 'i' && arg[1] == 'f' | |
1897 | && (arg[2] == ' ' || arg[2] == '\t')) | |
1898 | { | |
1899 | arg += 2; | |
1900 | cond_start = arg; | |
30875e1c | 1901 | cond = parse_exp_1 (&arg, block_for_pc (sals.sals[i].pc), 0); |
bd5635a1 RP |
1902 | cond_end = arg; |
1903 | } | |
1904 | else | |
1905 | error ("Junk at end of arguments."); | |
1906 | } | |
bd5635a1 RP |
1907 | } |
1908 | ||
d889f6b7 JK |
1909 | /* Remove the canonical strings from the cleanup, they are needed below. */ |
1910 | if (canonical != (char **)NULL) | |
1911 | discard_cleanups (canonical_strings_chain); | |
1912 | ||
30875e1c | 1913 | /* Now set all the breakpoints. */ |
bd5635a1 RP |
1914 | for (i = 0; i < sals.nelts; i++) |
1915 | { | |
1916 | sal = sals.sals[i]; | |
1917 | ||
1918 | if (from_tty) | |
1919 | describe_other_breakpoints (sal.pc); | |
1920 | ||
1921 | b = set_raw_breakpoint (sal); | |
1922 | set_breakpoint_count (breakpoint_count + 1); | |
1923 | b->number = breakpoint_count; | |
30875e1c | 1924 | b->type = bp_breakpoint; |
bd5635a1 | 1925 | b->cond = cond; |
0a97f6c4 | 1926 | |
d889f6b7 JK |
1927 | /* If a canonical line spec is needed use that instead of the |
1928 | command string. */ | |
1929 | if (canonical != (char **)NULL && canonical[i] != NULL) | |
1930 | b->addr_string = canonical[i]; | |
1931 | else if (addr_start) | |
bd5635a1 RP |
1932 | b->addr_string = savestring (addr_start, addr_end - addr_start); |
1933 | if (cond_start) | |
1934 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |
1935 | ||
30875e1c SG |
1936 | b->enable = enabled; |
1937 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 RP |
1938 | |
1939 | mention (b); | |
1940 | } | |
1941 | ||
1942 | if (sals.nelts > 1) | |
1943 | { | |
2d313932 JK |
1944 | printf ("Multiple breakpoints were set.\n"); |
1945 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
bd5635a1 | 1946 | } |
d889f6b7 | 1947 | do_cleanups (old_chain); |
bd5635a1 RP |
1948 | } |
1949 | ||
30875e1c SG |
1950 | /* Helper function for break_command_1 and disassemble_command. */ |
1951 | ||
1952 | void | |
1953 | resolve_sal_pc (sal) | |
1954 | struct symtab_and_line *sal; | |
1955 | { | |
1956 | CORE_ADDR pc; | |
1957 | ||
1958 | if (sal->pc == 0 && sal->symtab != 0) | |
1959 | { | |
1960 | pc = find_line_pc (sal->symtab, sal->line); | |
1961 | if (pc == 0) | |
1962 | error ("No line %d in file \"%s\".", | |
1963 | sal->line, sal->symtab->filename); | |
1964 | sal->pc = pc; | |
1965 | } | |
1966 | } | |
1967 | ||
bd5635a1 RP |
1968 | void |
1969 | break_command (arg, from_tty) | |
1970 | char *arg; | |
1971 | int from_tty; | |
1972 | { | |
1973 | break_command_1 (arg, 0, from_tty); | |
1974 | } | |
1975 | ||
1976 | static void | |
1977 | tbreak_command (arg, from_tty) | |
1978 | char *arg; | |
1979 | int from_tty; | |
1980 | { | |
1981 | break_command_1 (arg, 1, from_tty); | |
1982 | } | |
1983 | ||
bdbd5f50 | 1984 | /* ARGSUSED */ |
bd5635a1 RP |
1985 | static void |
1986 | watch_command (arg, from_tty) | |
1987 | char *arg; | |
1988 | int from_tty; | |
1989 | { | |
1990 | struct breakpoint *b; | |
1991 | struct symtab_and_line sal; | |
f266e564 JK |
1992 | struct expression *exp; |
1993 | struct block *exp_valid_block; | |
1994 | struct value *val; | |
bd5635a1 | 1995 | |
30875e1c | 1996 | sal.pc = 0; |
bd5635a1 RP |
1997 | sal.symtab = NULL; |
1998 | sal.line = 0; | |
1999 | ||
f266e564 JK |
2000 | /* Parse arguments. */ |
2001 | innermost_block = NULL; | |
d3b9c0df | 2002 | exp = parse_expression (arg); |
f266e564 JK |
2003 | exp_valid_block = innermost_block; |
2004 | val = evaluate_expression (exp); | |
2005 | release_value (val); | |
2d313932 JK |
2006 | if (VALUE_LAZY (val)) |
2007 | value_fetch_lazy (val); | |
f266e564 JK |
2008 | |
2009 | /* Now set up the breakpoint. */ | |
bd5635a1 RP |
2010 | b = set_raw_breakpoint (sal); |
2011 | set_breakpoint_count (breakpoint_count + 1); | |
2012 | b->number = breakpoint_count; | |
30875e1c SG |
2013 | b->type = bp_watchpoint; |
2014 | b->disposition = donttouch; | |
f266e564 JK |
2015 | b->exp = exp; |
2016 | b->exp_valid_block = exp_valid_block; | |
2017 | b->val = val; | |
bd5635a1 RP |
2018 | b->cond = 0; |
2019 | b->cond_string = NULL; | |
0eaaa46a | 2020 | b->exp_string = savestring (arg, strlen (arg)); |
bd5635a1 RP |
2021 | mention (b); |
2022 | } | |
2023 | \f | |
2024 | /* | |
2025 | * Helper routine for the until_command routine in infcmd.c. Here | |
2026 | * because it uses the mechanisms of breakpoints. | |
2027 | */ | |
bdbd5f50 | 2028 | /* ARGSUSED */ |
bd5635a1 RP |
2029 | void |
2030 | until_break_command (arg, from_tty) | |
2031 | char *arg; | |
2032 | int from_tty; | |
2033 | { | |
2034 | struct symtabs_and_lines sals; | |
2035 | struct symtab_and_line sal; | |
2036 | FRAME prev_frame = get_prev_frame (selected_frame); | |
30875e1c SG |
2037 | struct breakpoint *breakpoint; |
2038 | struct cleanup *old_chain; | |
bd5635a1 RP |
2039 | |
2040 | clear_proceed_status (); | |
2041 | ||
2042 | /* Set a breakpoint where the user wants it and at return from | |
2043 | this function */ | |
2044 | ||
2045 | if (default_breakpoint_valid) | |
2046 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
d889f6b7 | 2047 | default_breakpoint_line, (char ***)NULL); |
bd5635a1 | 2048 | else |
d889f6b7 | 2049 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL); |
bd5635a1 RP |
2050 | |
2051 | if (sals.nelts != 1) | |
2052 | error ("Couldn't get information on specified line."); | |
2053 | ||
2054 | sal = sals.sals[0]; | |
c8950965 | 2055 | free ((PTR)sals.sals); /* malloc'd, so freed */ |
bd5635a1 RP |
2056 | |
2057 | if (*arg) | |
2058 | error ("Junk at end of arguments."); | |
2059 | ||
30875e1c | 2060 | resolve_sal_pc (&sal); |
bd5635a1 | 2061 | |
30875e1c | 2062 | breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); |
bd5635a1 | 2063 | |
30875e1c SG |
2064 | old_chain = make_cleanup(delete_breakpoint, breakpoint); |
2065 | ||
bd5635a1 RP |
2066 | /* Keep within the current frame */ |
2067 | ||
2068 | if (prev_frame) | |
2069 | { | |
2070 | struct frame_info *fi; | |
2071 | ||
2072 | fi = get_frame_info (prev_frame); | |
2073 | sal = find_pc_line (fi->pc, 0); | |
2074 | sal.pc = fi->pc; | |
30875e1c SG |
2075 | breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); |
2076 | make_cleanup(delete_breakpoint, breakpoint); | |
bd5635a1 RP |
2077 | } |
2078 | ||
2079 | proceed (-1, -1, 0); | |
30875e1c | 2080 | do_cleanups(old_chain); |
bd5635a1 RP |
2081 | } |
2082 | \f | |
bdbd5f50 JG |
2083 | #if 0 |
2084 | /* These aren't used; I don't konw what they were for. */ | |
bd5635a1 RP |
2085 | /* Set a breakpoint at the catch clause for NAME. */ |
2086 | static int | |
2087 | catch_breakpoint (name) | |
2088 | char *name; | |
2089 | { | |
2090 | } | |
2091 | ||
2092 | static int | |
2093 | disable_catch_breakpoint () | |
2094 | { | |
2095 | } | |
2096 | ||
2097 | static int | |
2098 | delete_catch_breakpoint () | |
2099 | { | |
2100 | } | |
2101 | ||
2102 | static int | |
2103 | enable_catch_breakpoint () | |
2104 | { | |
2105 | } | |
bdbd5f50 | 2106 | #endif /* 0 */ |
bd5635a1 RP |
2107 | |
2108 | struct sal_chain | |
2109 | { | |
2110 | struct sal_chain *next; | |
2111 | struct symtab_and_line sal; | |
2112 | }; | |
2113 | ||
bdbd5f50 JG |
2114 | #if 0 |
2115 | /* This isn't used; I don't know what it was for. */ | |
bd5635a1 RP |
2116 | /* For each catch clause identified in ARGS, run FUNCTION |
2117 | with that clause as an argument. */ | |
2118 | static struct symtabs_and_lines | |
2119 | map_catch_names (args, function) | |
2120 | char *args; | |
2121 | int (*function)(); | |
2122 | { | |
2123 | register char *p = args; | |
2124 | register char *p1; | |
2125 | struct symtabs_and_lines sals; | |
bdbd5f50 | 2126 | #if 0 |
bd5635a1 | 2127 | struct sal_chain *sal_chain = 0; |
bdbd5f50 | 2128 | #endif |
bd5635a1 RP |
2129 | |
2130 | if (p == 0) | |
2131 | error_no_arg ("one or more catch names"); | |
2132 | ||
2133 | sals.nelts = 0; | |
2134 | sals.sals = NULL; | |
2135 | ||
2136 | while (*p) | |
2137 | { | |
2138 | p1 = p; | |
2139 | /* Don't swallow conditional part. */ | |
2140 | if (p1[0] == 'i' && p1[1] == 'f' | |
2141 | && (p1[2] == ' ' || p1[2] == '\t')) | |
2142 | break; | |
2143 | ||
2144 | if (isalpha (*p1)) | |
2145 | { | |
2146 | p1++; | |
2147 | while (isalnum (*p1) || *p1 == '_' || *p1 == '$') | |
2148 | p1++; | |
2149 | } | |
2150 | ||
2151 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
2152 | error ("Arguments must be catch names."); | |
2153 | ||
2154 | *p1 = 0; | |
2155 | #if 0 | |
2156 | if (function (p)) | |
2157 | { | |
2158 | struct sal_chain *next | |
2159 | = (struct sal_chain *)alloca (sizeof (struct sal_chain)); | |
2160 | next->next = sal_chain; | |
2161 | next->sal = get_catch_sal (p); | |
2162 | sal_chain = next; | |
2163 | goto win; | |
2164 | } | |
2165 | #endif | |
2d313932 | 2166 | printf ("No catch clause for exception %s.\n", p); |
bdbd5f50 | 2167 | #if 0 |
bd5635a1 | 2168 | win: |
bdbd5f50 | 2169 | #endif |
bd5635a1 RP |
2170 | p = p1; |
2171 | while (*p == ' ' || *p == '\t') p++; | |
2172 | } | |
2173 | } | |
bdbd5f50 | 2174 | #endif /* 0 */ |
bd5635a1 RP |
2175 | |
2176 | /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ | |
2177 | ||
2178 | static struct symtabs_and_lines | |
2179 | get_catch_sals (this_level_only) | |
2180 | int this_level_only; | |
2181 | { | |
bd5635a1 | 2182 | register struct blockvector *bl; |
777bef06 | 2183 | register struct block *block; |
bd5635a1 | 2184 | int index, have_default = 0; |
777bef06 JK |
2185 | struct frame_info *fi; |
2186 | CORE_ADDR pc; | |
bd5635a1 RP |
2187 | struct symtabs_and_lines sals; |
2188 | struct sal_chain *sal_chain = 0; | |
2189 | char *blocks_searched; | |
2190 | ||
777bef06 JK |
2191 | /* Not sure whether an error message is always the correct response, |
2192 | but it's better than a core dump. */ | |
2193 | if (selected_frame == NULL) | |
2194 | error ("No selected frame."); | |
2195 | block = get_frame_block (selected_frame); | |
2196 | fi = get_frame_info (selected_frame); | |
2197 | pc = fi->pc; | |
2198 | ||
bd5635a1 RP |
2199 | sals.nelts = 0; |
2200 | sals.sals = NULL; | |
2201 | ||
2202 | if (block == 0) | |
2203 | error ("No symbol table info available.\n"); | |
2204 | ||
2205 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); | |
2206 | blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
4ed3a9ea | 2207 | memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
bd5635a1 RP |
2208 | |
2209 | while (block != 0) | |
2210 | { | |
2211 | CORE_ADDR end = BLOCK_END (block) - 4; | |
2212 | int last_index; | |
2213 | ||
2214 | if (bl != blockvector_for_pc (end, &index)) | |
2215 | error ("blockvector blotch"); | |
2216 | if (BLOCKVECTOR_BLOCK (bl, index) != block) | |
2217 | error ("blockvector botch"); | |
2218 | last_index = BLOCKVECTOR_NBLOCKS (bl); | |
2219 | index += 1; | |
2220 | ||
2221 | /* Don't print out blocks that have gone by. */ | |
2222 | while (index < last_index | |
2223 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) | |
2224 | index++; | |
2225 | ||
2226 | while (index < last_index | |
2227 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) | |
2228 | { | |
2229 | if (blocks_searched[index] == 0) | |
2230 | { | |
2231 | struct block *b = BLOCKVECTOR_BLOCK (bl, index); | |
2232 | int nsyms; | |
2233 | register int i; | |
2234 | register struct symbol *sym; | |
2235 | ||
2236 | nsyms = BLOCK_NSYMS (b); | |
2237 | ||
2238 | for (i = 0; i < nsyms; i++) | |
2239 | { | |
2240 | sym = BLOCK_SYM (b, i); | |
2d313932 | 2241 | if (STREQ (SYMBOL_NAME (sym), "default")) |
bd5635a1 RP |
2242 | { |
2243 | if (have_default) | |
2244 | continue; | |
2245 | have_default = 1; | |
2246 | } | |
2247 | if (SYMBOL_CLASS (sym) == LOC_LABEL) | |
2248 | { | |
2249 | struct sal_chain *next = (struct sal_chain *) | |
2250 | alloca (sizeof (struct sal_chain)); | |
2251 | next->next = sal_chain; | |
2252 | next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); | |
2253 | sal_chain = next; | |
2254 | } | |
2255 | } | |
2256 | blocks_searched[index] = 1; | |
2257 | } | |
2258 | index++; | |
2259 | } | |
2260 | if (have_default) | |
2261 | break; | |
2262 | if (sal_chain && this_level_only) | |
2263 | break; | |
2264 | ||
2265 | /* After handling the function's top-level block, stop. | |
2266 | Don't continue to its superblock, the block of | |
2267 | per-file symbols. */ | |
2268 | if (BLOCK_FUNCTION (block)) | |
2269 | break; | |
2270 | block = BLOCK_SUPERBLOCK (block); | |
2271 | } | |
2272 | ||
2273 | if (sal_chain) | |
2274 | { | |
2275 | struct sal_chain *tmp_chain; | |
2276 | ||
2277 | /* Count the number of entries. */ | |
2278 | for (index = 0, tmp_chain = sal_chain; tmp_chain; | |
2279 | tmp_chain = tmp_chain->next) | |
2280 | index++; | |
2281 | ||
2282 | sals.nelts = index; | |
2283 | sals.sals = (struct symtab_and_line *) | |
2284 | xmalloc (index * sizeof (struct symtab_and_line)); | |
2285 | for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) | |
2286 | sals.sals[index] = sal_chain->sal; | |
2287 | } | |
2288 | ||
2289 | return sals; | |
2290 | } | |
2291 | ||
2292 | /* Commands to deal with catching exceptions. */ | |
2293 | ||
30875e1c | 2294 | static void |
bd5635a1 RP |
2295 | catch_command_1 (arg, tempflag, from_tty) |
2296 | char *arg; | |
2297 | int tempflag; | |
2298 | int from_tty; | |
2299 | { | |
2300 | /* First, translate ARG into something we can deal with in terms | |
2301 | of breakpoints. */ | |
2302 | ||
2303 | struct symtabs_and_lines sals; | |
2304 | struct symtab_and_line sal; | |
2305 | register struct expression *cond = 0; | |
2306 | register struct breakpoint *b; | |
2307 | char *save_arg; | |
2308 | int i; | |
bd5635a1 RP |
2309 | |
2310 | sal.line = sal.pc = sal.end = 0; | |
2311 | sal.symtab = 0; | |
2312 | ||
2313 | /* If no arg given, or if first arg is 'if ', all active catch clauses | |
2314 | are breakpointed. */ | |
2315 | ||
2316 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
2317 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
2318 | { | |
2319 | /* Grab all active catch clauses. */ | |
2320 | sals = get_catch_sals (0); | |
2321 | } | |
2322 | else | |
2323 | { | |
2324 | /* Grab selected catch clauses. */ | |
fe675038 | 2325 | error ("catch NAME not implemented"); |
bdbd5f50 JG |
2326 | #if 0 |
2327 | /* This isn't used; I don't know what it was for. */ | |
bd5635a1 | 2328 | sals = map_catch_names (arg, catch_breakpoint); |
bdbd5f50 | 2329 | #endif |
bd5635a1 RP |
2330 | } |
2331 | ||
2332 | if (! sals.nelts) | |
2333 | return; | |
2334 | ||
2335 | save_arg = arg; | |
2336 | for (i = 0; i < sals.nelts; i++) | |
2337 | { | |
30875e1c | 2338 | resolve_sal_pc (&sals.sals[i]); |
bd5635a1 RP |
2339 | |
2340 | while (arg && *arg) | |
2341 | { | |
2342 | if (arg[0] == 'i' && arg[1] == 'f' | |
2343 | && (arg[2] == ' ' || arg[2] == '\t')) | |
30875e1c SG |
2344 | cond = parse_exp_1 ((arg += 2, &arg), |
2345 | block_for_pc (sals.sals[i].pc), 0); | |
bd5635a1 RP |
2346 | else |
2347 | error ("Junk at end of arguments."); | |
2348 | } | |
2349 | arg = save_arg; | |
bd5635a1 RP |
2350 | } |
2351 | ||
2352 | for (i = 0; i < sals.nelts; i++) | |
2353 | { | |
2354 | sal = sals.sals[i]; | |
2355 | ||
2356 | if (from_tty) | |
2357 | describe_other_breakpoints (sal.pc); | |
2358 | ||
2359 | b = set_raw_breakpoint (sal); | |
30875e1c SG |
2360 | set_breakpoint_count (breakpoint_count + 1); |
2361 | b->number = breakpoint_count; | |
2362 | b->type = bp_breakpoint; | |
bd5635a1 | 2363 | b->cond = cond; |
30875e1c SG |
2364 | b->enable = enabled; |
2365 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 | 2366 | |
d889f6b7 | 2367 | mention (b); |
bd5635a1 RP |
2368 | } |
2369 | ||
2370 | if (sals.nelts > 1) | |
2371 | { | |
2d313932 JK |
2372 | printf ("Multiple breakpoints were set.\n"); |
2373 | printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
bd5635a1 | 2374 | } |
c8950965 | 2375 | free ((PTR)sals.sals); |
bd5635a1 RP |
2376 | } |
2377 | ||
bdbd5f50 JG |
2378 | #if 0 |
2379 | /* These aren't used; I don't know what they were for. */ | |
bd5635a1 RP |
2380 | /* Disable breakpoints on all catch clauses described in ARGS. */ |
2381 | static void | |
2382 | disable_catch (args) | |
2383 | char *args; | |
2384 | { | |
2385 | /* Map the disable command to catch clauses described in ARGS. */ | |
2386 | } | |
2387 | ||
2388 | /* Enable breakpoints on all catch clauses described in ARGS. */ | |
2389 | static void | |
2390 | enable_catch (args) | |
2391 | char *args; | |
2392 | { | |
2393 | /* Map the disable command to catch clauses described in ARGS. */ | |
2394 | } | |
2395 | ||
2396 | /* Delete breakpoints on all catch clauses in the active scope. */ | |
2397 | static void | |
2398 | delete_catch (args) | |
2399 | char *args; | |
2400 | { | |
2401 | /* Map the delete command to catch clauses described in ARGS. */ | |
2402 | } | |
bdbd5f50 | 2403 | #endif /* 0 */ |
bd5635a1 RP |
2404 | |
2405 | static void | |
2406 | catch_command (arg, from_tty) | |
2407 | char *arg; | |
2408 | int from_tty; | |
2409 | { | |
2410 | catch_command_1 (arg, 0, from_tty); | |
2411 | } | |
2412 | \f | |
2413 | static void | |
2414 | clear_command (arg, from_tty) | |
2415 | char *arg; | |
2416 | int from_tty; | |
2417 | { | |
2418 | register struct breakpoint *b, *b1; | |
2419 | struct symtabs_and_lines sals; | |
2420 | struct symtab_and_line sal; | |
2421 | register struct breakpoint *found; | |
2422 | int i; | |
2423 | ||
2424 | if (arg) | |
2425 | { | |
2426 | sals = decode_line_spec (arg, 1); | |
2427 | } | |
2428 | else | |
2429 | { | |
2430 | sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); | |
2431 | sal.line = default_breakpoint_line; | |
2432 | sal.symtab = default_breakpoint_symtab; | |
2433 | sal.pc = 0; | |
2434 | if (sal.symtab == 0) | |
2435 | error ("No source file specified."); | |
2436 | ||
2437 | sals.sals[0] = sal; | |
2438 | sals.nelts = 1; | |
2439 | } | |
2440 | ||
2441 | for (i = 0; i < sals.nelts; i++) | |
2442 | { | |
2443 | /* If exact pc given, clear bpts at that pc. | |
2444 | But if sal.pc is zero, clear all bpts on specified line. */ | |
2445 | sal = sals.sals[i]; | |
2446 | found = (struct breakpoint *) 0; | |
2447 | while (breakpoint_chain | |
d889f6b7 JK |
2448 | && (sal.pc |
2449 | ? breakpoint_chain->address == sal.pc | |
2450 | : (breakpoint_chain->source_file != NULL | |
2451 | && sal.symtab != NULL | |
2452 | && STREQ (breakpoint_chain->source_file, | |
2453 | sal.symtab->filename) | |
bd5635a1 RP |
2454 | && breakpoint_chain->line_number == sal.line))) |
2455 | { | |
2456 | b1 = breakpoint_chain; | |
2457 | breakpoint_chain = b1->next; | |
2458 | b1->next = found; | |
2459 | found = b1; | |
2460 | } | |
2461 | ||
2462 | ALL_BREAKPOINTS (b) | |
2463 | while (b->next | |
30875e1c | 2464 | && b->next->type != bp_watchpoint |
d889f6b7 JK |
2465 | && (sal.pc |
2466 | ? b->next->address == sal.pc | |
2467 | : (b->next->source_file != NULL | |
2468 | && sal.symtab != NULL | |
2469 | && STREQ (b->next->source_file, sal.symtab->filename) | |
bd5635a1 RP |
2470 | && b->next->line_number == sal.line))) |
2471 | { | |
2472 | b1 = b->next; | |
2473 | b->next = b1->next; | |
2474 | b1->next = found; | |
2475 | found = b1; | |
2476 | } | |
2477 | ||
2478 | if (found == 0) | |
2479 | { | |
2480 | if (arg) | |
2481 | error ("No breakpoint at %s.", arg); | |
2482 | else | |
2483 | error ("No breakpoint at this line."); | |
2484 | } | |
2485 | ||
2486 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ | |
2d313932 | 2487 | if (from_tty) printf ("Deleted breakpoint%s ", found->next ? "s" : ""); |
bd5635a1 RP |
2488 | while (found) |
2489 | { | |
2d313932 | 2490 | if (from_tty) printf ("%d ", found->number); |
bd5635a1 RP |
2491 | b1 = found->next; |
2492 | delete_breakpoint (found); | |
2493 | found = b1; | |
2494 | } | |
2495 | if (from_tty) putchar ('\n'); | |
2496 | } | |
c8950965 | 2497 | free ((PTR)sals.sals); |
bd5635a1 RP |
2498 | } |
2499 | \f | |
2500 | /* Delete breakpoint in BS if they are `delete' breakpoints. | |
2501 | This is called after any breakpoint is hit, or after errors. */ | |
2502 | ||
2503 | void | |
2504 | breakpoint_auto_delete (bs) | |
2505 | bpstat bs; | |
2506 | { | |
2507 | for (; bs; bs = bs->next) | |
cef4c2e7 PS |
2508 | if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete |
2509 | && bs->stop) | |
bd5635a1 RP |
2510 | delete_breakpoint (bs->breakpoint_at); |
2511 | } | |
2512 | ||
2513 | /* Delete a breakpoint and clean up all traces of it in the data structures. */ | |
2514 | ||
30875e1c | 2515 | void |
bd5635a1 RP |
2516 | delete_breakpoint (bpt) |
2517 | struct breakpoint *bpt; | |
2518 | { | |
2519 | register struct breakpoint *b; | |
2520 | register bpstat bs; | |
2521 | ||
2522 | if (bpt->inserted) | |
fe675038 | 2523 | target_remove_breakpoint(bpt->address, bpt->shadow_contents); |
bd5635a1 RP |
2524 | |
2525 | if (breakpoint_chain == bpt) | |
2526 | breakpoint_chain = bpt->next; | |
2527 | ||
2528 | ALL_BREAKPOINTS (b) | |
2529 | if (b->next == bpt) | |
2530 | { | |
2531 | b->next = bpt->next; | |
2532 | break; | |
2533 | } | |
2534 | ||
2535 | check_duplicates (bpt->address); | |
fe675038 JK |
2536 | /* If this breakpoint was inserted, and there is another breakpoint |
2537 | at the same address, we need to insert the other breakpoint. */ | |
2538 | if (bpt->inserted) | |
2539 | { | |
2540 | ALL_BREAKPOINTS (b) | |
ebad9e90 JK |
2541 | if (b->address == bpt->address |
2542 | && !b->duplicate | |
2543 | && b->enable != disabled) | |
fe675038 JK |
2544 | { |
2545 | int val; | |
2546 | val = target_insert_breakpoint (b->address, b->shadow_contents); | |
2547 | if (val != 0) | |
2548 | { | |
2549 | fprintf (stderr, "Cannot insert breakpoint %d:\n", b->number); | |
2550 | memory_error (val, b->address); /* which bombs us out */ | |
2551 | } | |
2552 | else | |
2553 | b->inserted = 1; | |
2554 | } | |
2555 | } | |
bd5635a1 RP |
2556 | |
2557 | free_command_lines (&bpt->commands); | |
2558 | if (bpt->cond) | |
d889f6b7 | 2559 | free (bpt->cond); |
bd5635a1 | 2560 | if (bpt->cond_string != NULL) |
d889f6b7 | 2561 | free (bpt->cond_string); |
bd5635a1 | 2562 | if (bpt->addr_string != NULL) |
d889f6b7 | 2563 | free (bpt->addr_string); |
0eaaa46a | 2564 | if (bpt->exp_string != NULL) |
d889f6b7 JK |
2565 | free (bpt->exp_string); |
2566 | if (bpt->source_file != NULL) | |
2567 | free (bpt->source_file); | |
bd5635a1 | 2568 | |
30875e1c | 2569 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
2d313932 | 2570 | printf ("breakpoint #%d deleted\n", bpt->number); |
bd5635a1 RP |
2571 | |
2572 | /* Be sure no bpstat's are pointing at it after it's been freed. */ | |
2573 | /* FIXME, how can we find all bpstat's? We just check stop_bpstat for now. */ | |
2574 | for (bs = stop_bpstat; bs; bs = bs->next) | |
2575 | if (bs->breakpoint_at == bpt) | |
2576 | bs->breakpoint_at = NULL; | |
c8950965 | 2577 | free ((PTR)bpt); |
bd5635a1 RP |
2578 | } |
2579 | ||
bd5635a1 RP |
2580 | static void |
2581 | delete_command (arg, from_tty) | |
2582 | char *arg; | |
2583 | int from_tty; | |
2584 | { | |
2585 | ||
2586 | if (arg == 0) | |
2587 | { | |
2588 | /* Ask user only if there are some breakpoints to delete. */ | |
2589 | if (!from_tty | |
2590 | || (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0))) | |
2591 | { | |
2592 | /* No arg; clear all breakpoints. */ | |
2593 | while (breakpoint_chain) | |
2594 | delete_breakpoint (breakpoint_chain); | |
2595 | } | |
2596 | } | |
2597 | else | |
2598 | map_breakpoint_numbers (arg, delete_breakpoint); | |
2599 | } | |
2600 | ||
bdbd5f50 JG |
2601 | /* Reset a breakpoint given it's struct breakpoint * BINT. |
2602 | The value we return ends up being the return value from catch_errors. | |
2603 | Unused in this case. */ | |
2604 | ||
2605 | static int | |
bd5635a1 | 2606 | breakpoint_re_set_one (bint) |
bdbd5f50 | 2607 | char *bint; |
bd5635a1 RP |
2608 | { |
2609 | struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ | |
2610 | int i; | |
2611 | struct symtabs_and_lines sals; | |
bd5635a1 | 2612 | char *s; |
30875e1c | 2613 | enum enable save_enable; |
bd5635a1 | 2614 | |
80ba48f5 | 2615 | switch (b->type) |
bd5635a1 | 2616 | { |
80ba48f5 SG |
2617 | case bp_breakpoint: |
2618 | if (b->addr_string == NULL) | |
2619 | { | |
2620 | /* Anything without a string can't be re-set. */ | |
2621 | delete_breakpoint (b); | |
2622 | return 0; | |
2623 | } | |
30875e1c SG |
2624 | /* In case we have a problem, disable this breakpoint. We'll restore |
2625 | its status if we succeed. */ | |
2626 | save_enable = b->enable; | |
2627 | b->enable = disabled; | |
2628 | ||
bd5635a1 | 2629 | s = b->addr_string; |
d889f6b7 | 2630 | sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0, (char ***)NULL); |
bd5635a1 RP |
2631 | for (i = 0; i < sals.nelts; i++) |
2632 | { | |
30875e1c | 2633 | resolve_sal_pc (&sals.sals[i]); |
fee933f1 RP |
2634 | |
2635 | /* Reparse conditions, they might contain references to the | |
2636 | old symtab. */ | |
2637 | if (b->cond_string != NULL) | |
2638 | { | |
2639 | s = b->cond_string; | |
2640 | if (b->cond) | |
2641 | free ((PTR)b->cond); | |
2642 | b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); | |
2643 | } | |
2644 | ||
2645 | /* We need to re-set the breakpoint if the address changes...*/ | |
d889f6b7 | 2646 | if (b->address != sals.sals[i].pc |
fee933f1 RP |
2647 | /* ...or new and old breakpoints both have source files, and |
2648 | the source file name or the line number changes... */ | |
d889f6b7 JK |
2649 | || (b->source_file != NULL |
2650 | && sals.sals[i].symtab != NULL | |
2651 | && (!STREQ (b->source_file, sals.sals[i].symtab->filename) | |
2652 | || b->line_number != sals.sals[i].line) | |
fee933f1 RP |
2653 | ) |
2654 | /* ...or we switch between having a source file and not having | |
2655 | one. */ | |
2656 | || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL)) | |
2657 | ) | |
bd5635a1 | 2658 | { |
d889f6b7 JK |
2659 | if (b->source_file != NULL) |
2660 | free (b->source_file); | |
2661 | if (sals.sals[i].symtab == NULL) | |
2662 | b->source_file = NULL; | |
2663 | else | |
2664 | b->source_file = | |
2665 | savestring (sals.sals[i].symtab->filename, | |
2666 | strlen (sals.sals[i].symtab->filename)); | |
8537ba60 SG |
2667 | b->line_number = sals.sals[i].line; |
2668 | b->address = sals.sals[i].pc; | |
bd5635a1 | 2669 | |
8537ba60 | 2670 | check_duplicates (b->address); |
bd5635a1 | 2671 | |
8537ba60 SG |
2672 | mention (b); |
2673 | } | |
30875e1c | 2674 | b->enable = save_enable; /* Restore it, this worked. */ |
bd5635a1 | 2675 | } |
c8950965 | 2676 | free ((PTR)sals.sals); |
80ba48f5 | 2677 | break; |
2d313932 | 2678 | |
80ba48f5 | 2679 | case bp_watchpoint: |
0eaaa46a | 2680 | innermost_block = NULL; |
0a97f6c4 JK |
2681 | /* The issue arises of what context to evaluate this in. The same |
2682 | one as when it was set, but what does that mean when symbols have | |
2683 | been re-read? We could save the filename and functionname, but | |
2684 | if the context is more local than that, the best we could do would | |
2685 | be something like how many levels deep and which index at that | |
2686 | particular level, but that's going to be less stable than filenames | |
2687 | or functionnames. */ | |
2688 | /* So for now, just use a global context. */ | |
0eaaa46a JK |
2689 | b->exp = parse_expression (b->exp_string); |
2690 | b->exp_valid_block = innermost_block; | |
2691 | b->val = evaluate_expression (b->exp); | |
2692 | release_value (b->val); | |
2693 | if (VALUE_LAZY (b->val)) | |
2694 | value_fetch_lazy (b->val); | |
2695 | ||
2d313932 JK |
2696 | if (b->cond_string != NULL) |
2697 | { | |
2698 | s = b->cond_string; | |
2699 | b->cond = parse_exp_1 (&s, (struct block *)0, 0); | |
2700 | } | |
cabd4da6 JK |
2701 | if (b->enable == enabled) |
2702 | mention (b); | |
80ba48f5 | 2703 | break; |
2d313932 | 2704 | |
80ba48f5 SG |
2705 | default: |
2706 | printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); | |
2d313932 | 2707 | /* fall through */ |
80ba48f5 SG |
2708 | case bp_until: |
2709 | case bp_finish: | |
2710 | case bp_longjmp: | |
2711 | case bp_longjmp_resume: | |
2712 | delete_breakpoint (b); | |
2713 | break; | |
bd5635a1 | 2714 | } |
80ba48f5 | 2715 | |
bdbd5f50 | 2716 | return 0; |
bd5635a1 RP |
2717 | } |
2718 | ||
2719 | /* Re-set all breakpoints after symbols have been re-loaded. */ | |
2720 | void | |
2721 | breakpoint_re_set () | |
2722 | { | |
cba0d141 | 2723 | struct breakpoint *b, *temp; |
30875e1c SG |
2724 | static char message1[] = "Error in re-setting breakpoint %d:\n"; |
2725 | char message[sizeof (message1) + 30 /* slop */]; | |
bd5635a1 | 2726 | |
cba0d141 | 2727 | ALL_BREAKPOINTS_SAFE (b, temp) |
bd5635a1 | 2728 | { |
2d313932 | 2729 | sprintf (message, message1, b->number); /* Format possible error msg */ |
fe675038 JK |
2730 | catch_errors (breakpoint_re_set_one, (char *) b, message, |
2731 | RETURN_MASK_ALL); | |
bd5635a1 RP |
2732 | } |
2733 | ||
80ba48f5 SG |
2734 | create_longjmp_breakpoint("longjmp"); |
2735 | create_longjmp_breakpoint("_longjmp"); | |
2736 | create_longjmp_breakpoint("siglongjmp"); | |
2737 | create_longjmp_breakpoint(NULL); | |
2738 | ||
1eeba686 PB |
2739 | #if 0 |
2740 | /* Took this out (temporaliy at least), since it produces an extra | |
2741 | blank line at startup. This messes up the gdbtests. -PB */ | |
bd5635a1 RP |
2742 | /* Blank line to finish off all those mention() messages we just printed. */ |
2743 | printf_filtered ("\n"); | |
1eeba686 | 2744 | #endif |
bd5635a1 RP |
2745 | } |
2746 | \f | |
2747 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |
2748 | If from_tty is nonzero, it prints a message to that effect, | |
2749 | which ends with a period (no newline). */ | |
2750 | ||
2751 | void | |
2752 | set_ignore_count (bptnum, count, from_tty) | |
2753 | int bptnum, count, from_tty; | |
2754 | { | |
2755 | register struct breakpoint *b; | |
2756 | ||
2757 | if (count < 0) | |
2758 | count = 0; | |
2759 | ||
2760 | ALL_BREAKPOINTS (b) | |
2761 | if (b->number == bptnum) | |
2762 | { | |
2763 | b->ignore_count = count; | |
2764 | if (!from_tty) | |
2765 | return; | |
2766 | else if (count == 0) | |
423e9664 SG |
2767 | printf_filtered ("Will stop next time breakpoint %d is reached.", |
2768 | bptnum); | |
bd5635a1 | 2769 | else if (count == 1) |
423e9664 SG |
2770 | printf_filtered ("Will ignore next crossing of breakpoint %d.", |
2771 | bptnum); | |
bd5635a1 | 2772 | else |
423e9664 | 2773 | printf_filtered ("Will ignore next %d crossings of breakpoint %d.", |
bd5635a1 RP |
2774 | count, bptnum); |
2775 | return; | |
2776 | } | |
2777 | ||
2778 | error ("No breakpoint number %d.", bptnum); | |
2779 | } | |
2780 | ||
2781 | /* Clear the ignore counts of all breakpoints. */ | |
2782 | void | |
2783 | breakpoint_clear_ignore_counts () | |
2784 | { | |
2785 | struct breakpoint *b; | |
2786 | ||
2787 | ALL_BREAKPOINTS (b) | |
2788 | b->ignore_count = 0; | |
2789 | } | |
2790 | ||
2791 | /* Command to set ignore-count of breakpoint N to COUNT. */ | |
2792 | ||
2793 | static void | |
2794 | ignore_command (args, from_tty) | |
2795 | char *args; | |
2796 | int from_tty; | |
2797 | { | |
2798 | char *p = args; | |
2799 | register int num; | |
2800 | ||
2801 | if (p == 0) | |
2802 | error_no_arg ("a breakpoint number"); | |
2803 | ||
2804 | num = get_number (&p); | |
2805 | ||
2806 | if (*p == 0) | |
2807 | error ("Second argument (specified ignore-count) is missing."); | |
2808 | ||
bdbd5f50 JG |
2809 | set_ignore_count (num, |
2810 | longest_to_int (value_as_long (parse_and_eval (p))), | |
2811 | from_tty); | |
423e9664 | 2812 | printf_filtered ("\n"); |
bd5635a1 RP |
2813 | } |
2814 | \f | |
2815 | /* Call FUNCTION on each of the breakpoints | |
2816 | whose numbers are given in ARGS. */ | |
2817 | ||
2818 | static void | |
2819 | map_breakpoint_numbers (args, function) | |
2820 | char *args; | |
30875e1c | 2821 | void (*function) PARAMS ((struct breakpoint *)); |
bd5635a1 RP |
2822 | { |
2823 | register char *p = args; | |
2824 | char *p1; | |
2825 | register int num; | |
2826 | register struct breakpoint *b; | |
2827 | ||
2828 | if (p == 0) | |
2829 | error_no_arg ("one or more breakpoint numbers"); | |
2830 | ||
2831 | while (*p) | |
2832 | { | |
2833 | p1 = p; | |
2834 | ||
2835 | num = get_number (&p1); | |
2836 | ||
2837 | ALL_BREAKPOINTS (b) | |
2838 | if (b->number == num) | |
2839 | { | |
2840 | function (b); | |
2841 | goto win; | |
2842 | } | |
2d313932 | 2843 | printf ("No breakpoint number %d.\n", num); |
bd5635a1 RP |
2844 | win: |
2845 | p = p1; | |
2846 | } | |
2847 | } | |
2848 | ||
2849 | static void | |
2850 | enable_breakpoint (bpt) | |
2851 | struct breakpoint *bpt; | |
2852 | { | |
fee933f1 | 2853 | FRAME save_selected_frame = NULL; |
fa99ebe1 JK |
2854 | int save_selected_frame_level = -1; |
2855 | ||
bd5635a1 RP |
2856 | bpt->enable = enabled; |
2857 | ||
30875e1c | 2858 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
2d313932 | 2859 | printf ("breakpoint #%d enabled\n", bpt->number); |
bd5635a1 RP |
2860 | |
2861 | check_duplicates (bpt->address); | |
30875e1c | 2862 | if (bpt->type == bp_watchpoint) |
bd5635a1 | 2863 | { |
fa99ebe1 | 2864 | if (bpt->exp_valid_block != NULL) |
f266e564 | 2865 | { |
fa99ebe1 JK |
2866 | FRAME fr = within_scope (bpt->exp_valid_block); |
2867 | if (fr == NULL) | |
2868 | { | |
2869 | printf_filtered ("\ | |
f266e564 JK |
2870 | Cannot enable watchpoint %d because the block in which its expression\n\ |
2871 | is valid is not currently in scope.\n", bpt->number); | |
fa99ebe1 JK |
2872 | bpt->enable = disabled; |
2873 | return; | |
2874 | } | |
2875 | save_selected_frame = selected_frame; | |
2876 | save_selected_frame_level = selected_frame_level; | |
2877 | select_frame (fr, -1); | |
f266e564 JK |
2878 | } |
2879 | ||
bd5635a1 RP |
2880 | value_free (bpt->val); |
2881 | ||
2882 | bpt->val = evaluate_expression (bpt->exp); | |
2883 | release_value (bpt->val); | |
2d313932 JK |
2884 | if (VALUE_LAZY (bpt->val)) |
2885 | value_fetch_lazy (bpt->val); | |
fa99ebe1 JK |
2886 | |
2887 | if (save_selected_frame_level >= 0) | |
2888 | select_frame (save_selected_frame, save_selected_frame_level); | |
bd5635a1 RP |
2889 | } |
2890 | } | |
2891 | ||
bdbd5f50 | 2892 | /* ARGSUSED */ |
bd5635a1 RP |
2893 | static void |
2894 | enable_command (args, from_tty) | |
2895 | char *args; | |
2896 | int from_tty; | |
2897 | { | |
2898 | struct breakpoint *bpt; | |
2899 | if (args == 0) | |
2900 | ALL_BREAKPOINTS (bpt) | |
423e9664 SG |
2901 | switch (bpt->type) |
2902 | { | |
2903 | case bp_breakpoint: | |
2904 | case bp_watchpoint: | |
2905 | enable_breakpoint (bpt); | |
2906 | default: | |
2907 | continue; | |
2908 | } | |
bd5635a1 RP |
2909 | else |
2910 | map_breakpoint_numbers (args, enable_breakpoint); | |
2911 | } | |
2912 | ||
2913 | static void | |
2914 | disable_breakpoint (bpt) | |
2915 | struct breakpoint *bpt; | |
2916 | { | |
2917 | bpt->enable = disabled; | |
2918 | ||
30875e1c | 2919 | if (xgdb_verbose && bpt->type == bp_breakpoint) |
423e9664 | 2920 | printf_filtered ("breakpoint #%d disabled\n", bpt->number); |
bd5635a1 RP |
2921 | |
2922 | check_duplicates (bpt->address); | |
2923 | } | |
2924 | ||
bdbd5f50 | 2925 | /* ARGSUSED */ |
bd5635a1 RP |
2926 | static void |
2927 | disable_command (args, from_tty) | |
2928 | char *args; | |
2929 | int from_tty; | |
2930 | { | |
2931 | register struct breakpoint *bpt; | |
2932 | if (args == 0) | |
2933 | ALL_BREAKPOINTS (bpt) | |
423e9664 SG |
2934 | switch (bpt->type) |
2935 | { | |
2936 | case bp_breakpoint: | |
2937 | case bp_watchpoint: | |
2938 | disable_breakpoint (bpt); | |
2939 | default: | |
2940 | continue; | |
2941 | } | |
bd5635a1 RP |
2942 | else |
2943 | map_breakpoint_numbers (args, disable_breakpoint); | |
2944 | } | |
2945 | ||
2946 | static void | |
2947 | enable_once_breakpoint (bpt) | |
2948 | struct breakpoint *bpt; | |
2949 | { | |
30875e1c SG |
2950 | bpt->enable = enabled; |
2951 | bpt->disposition = disable; | |
bd5635a1 RP |
2952 | |
2953 | check_duplicates (bpt->address); | |
2954 | } | |
2955 | ||
bdbd5f50 | 2956 | /* ARGSUSED */ |
bd5635a1 RP |
2957 | static void |
2958 | enable_once_command (args, from_tty) | |
2959 | char *args; | |
2960 | int from_tty; | |
2961 | { | |
2962 | map_breakpoint_numbers (args, enable_once_breakpoint); | |
2963 | } | |
2964 | ||
2965 | static void | |
2966 | enable_delete_breakpoint (bpt) | |
2967 | struct breakpoint *bpt; | |
2968 | { | |
30875e1c SG |
2969 | bpt->enable = enabled; |
2970 | bpt->disposition = delete; | |
bd5635a1 RP |
2971 | |
2972 | check_duplicates (bpt->address); | |
2973 | } | |
2974 | ||
bdbd5f50 | 2975 | /* ARGSUSED */ |
bd5635a1 RP |
2976 | static void |
2977 | enable_delete_command (args, from_tty) | |
2978 | char *args; | |
2979 | int from_tty; | |
2980 | { | |
2981 | map_breakpoint_numbers (args, enable_delete_breakpoint); | |
2982 | } | |
2983 | \f | |
2984 | /* | |
2985 | * Use default_breakpoint_'s, or nothing if they aren't valid. | |
2986 | */ | |
2987 | struct symtabs_and_lines | |
2988 | decode_line_spec_1 (string, funfirstline) | |
2989 | char *string; | |
2990 | int funfirstline; | |
2991 | { | |
2992 | struct symtabs_and_lines sals; | |
2993 | if (string == 0) | |
2994 | error ("Empty line specification."); | |
2995 | if (default_breakpoint_valid) | |
2996 | sals = decode_line_1 (&string, funfirstline, | |
d889f6b7 JK |
2997 | default_breakpoint_symtab, default_breakpoint_line, |
2998 | (char ***)NULL); | |
bd5635a1 | 2999 | else |
d889f6b7 JK |
3000 | sals = decode_line_1 (&string, funfirstline, |
3001 | (struct symtab *)NULL, 0, (char ***)NULL); | |
bd5635a1 RP |
3002 | if (*string) |
3003 | error ("Junk at end of line specification: %s", string); | |
3004 | return sals; | |
3005 | } | |
3006 | \f | |
bd5635a1 RP |
3007 | void |
3008 | _initialize_breakpoint () | |
3009 | { | |
3010 | breakpoint_chain = 0; | |
3011 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful | |
3012 | before a breakpoint is set. */ | |
3013 | breakpoint_count = 0; | |
3014 | ||
3015 | add_com ("ignore", class_breakpoint, ignore_command, | |
3016 | "Set ignore-count of breakpoint number N to COUNT."); | |
3017 | ||
3018 | add_com ("commands", class_breakpoint, commands_command, | |
3019 | "Set commands to be executed when a breakpoint is hit.\n\ | |
3020 | Give breakpoint number as argument after \"commands\".\n\ | |
3021 | With no argument, the targeted breakpoint is the last one set.\n\ | |
3022 | The commands themselves follow starting on the next line.\n\ | |
3023 | Type a line containing \"end\" to indicate the end of them.\n\ | |
3024 | Give \"silent\" as the first line to make the breakpoint silent;\n\ | |
3025 | then no output is printed when it is hit, except what the commands print."); | |
3026 | ||
3027 | add_com ("condition", class_breakpoint, condition_command, | |
3028 | "Specify breakpoint number N to break only if COND is true.\n\ | |
d3b9c0df JG |
3029 | N is an integer; COND is an expression to be evaluated whenever\n\ |
3030 | breakpoint N is reached. "); | |
bd5635a1 RP |
3031 | |
3032 | add_com ("tbreak", class_breakpoint, tbreak_command, | |
3033 | "Set a temporary breakpoint. Args like \"break\" command.\n\ | |
3034 | Like \"break\" except the breakpoint is only enabled temporarily,\n\ | |
3035 | so it will be disabled when hit. Equivalent to \"break\" followed\n\ | |
3036 | by using \"enable once\" on the breakpoint number."); | |
3037 | ||
3038 | add_prefix_cmd ("enable", class_breakpoint, enable_command, | |
3039 | "Enable some breakpoints.\n\ | |
3040 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
3041 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
3042 | This is used to cancel the effect of the \"disable\" command.\n\ | |
3043 | With a subcommand you can enable temporarily.", | |
3044 | &enablelist, "enable ", 1, &cmdlist); | |
3045 | ||
3046 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, | |
3047 | "Enable some breakpoints.\n\ | |
3048 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
3049 | This is used to cancel the effect of the \"disable\" command.\n\ | |
3050 | May be abbreviated to simply \"enable\".\n", | |
3051 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); | |
3052 | ||
3053 | add_cmd ("once", no_class, enable_once_command, | |
3054 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
3055 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ | |
3056 | See the \"tbreak\" command which sets a breakpoint and enables it once.", | |
3057 | &enablebreaklist); | |
3058 | ||
3059 | add_cmd ("delete", no_class, enable_delete_command, | |
3060 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
3061 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
3062 | &enablebreaklist); | |
3063 | ||
3064 | add_cmd ("delete", no_class, enable_delete_command, | |
3065 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
3066 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
3067 | &enablelist); | |
3068 | ||
3069 | add_cmd ("once", no_class, enable_once_command, | |
3070 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
3071 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ | |
3072 | See the \"tbreak\" command which sets a breakpoint and enables it once.", | |
3073 | &enablelist); | |
3074 | ||
3075 | add_prefix_cmd ("disable", class_breakpoint, disable_command, | |
3076 | "Disable some breakpoints.\n\ | |
3077 | Arguments are breakpoint numbers with spaces in between.\n\ | |
3078 | To disable all breakpoints, give no argument.\n\ | |
3079 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", | |
3080 | &disablelist, "disable ", 1, &cmdlist); | |
3081 | add_com_alias ("dis", "disable", class_breakpoint, 1); | |
3082 | add_com_alias ("disa", "disable", class_breakpoint, 1); | |
3083 | ||
3084 | add_cmd ("breakpoints", class_alias, disable_command, | |
3085 | "Disable some breakpoints.\n\ | |
3086 | Arguments are breakpoint numbers with spaces in between.\n\ | |
3087 | To disable all breakpoints, give no argument.\n\ | |
3088 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |
3089 | This command may be abbreviated \"disable\".", | |
3090 | &disablelist); | |
3091 | ||
3092 | add_prefix_cmd ("delete", class_breakpoint, delete_command, | |
3093 | "Delete some breakpoints or auto-display expressions.\n\ | |
3094 | Arguments are breakpoint numbers with spaces in between.\n\ | |
3095 | To delete all breakpoints, give no argument.\n\ | |
3096 | \n\ | |
3097 | Also a prefix command for deletion of other GDB objects.\n\ | |
3098 | The \"unset\" command is also an alias for \"delete\".", | |
3099 | &deletelist, "delete ", 1, &cmdlist); | |
3100 | add_com_alias ("d", "delete", class_breakpoint, 1); | |
bd5635a1 RP |
3101 | |
3102 | add_cmd ("breakpoints", class_alias, delete_command, | |
3103 | "Delete some breakpoints or auto-display expressions.\n\ | |
3104 | Arguments are breakpoint numbers with spaces in between.\n\ | |
3105 | To delete all breakpoints, give no argument.\n\ | |
3106 | This command may be abbreviated \"delete\".", | |
3107 | &deletelist); | |
3108 | ||
3109 | add_com ("clear", class_breakpoint, clear_command, | |
3110 | "Clear breakpoint at specified line or function.\n\ | |
3111 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
3112 | If line number is specified, all breakpoints in that line are cleared.\n\ | |
3113 | If function is specified, breakpoints at beginning of function are cleared.\n\ | |
3114 | If an address is specified, breakpoints at that address are cleared.\n\n\ | |
3115 | With no argument, clears all breakpoints in the line that the selected frame\n\ | |
3116 | is executing in.\n\ | |
3117 | \n\ | |
3118 | See also the \"delete\" command which clears breakpoints by number."); | |
3119 | ||
3120 | add_com ("break", class_breakpoint, break_command, | |
3121 | "Set breakpoint at specified line or function.\n\ | |
3122 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
3123 | If line number is specified, break at start of code for that line.\n\ | |
3124 | If function is specified, break at start of code for that function.\n\ | |
3125 | If an address is specified, break at that exact address.\n\ | |
3126 | With no arg, uses current execution address of selected stack frame.\n\ | |
3127 | This is useful for breaking on return to a stack frame.\n\ | |
3128 | \n\ | |
3129 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
3130 | \n\ | |
3131 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
3132 | add_com_alias ("b", "break", class_run, 1); | |
3133 | add_com_alias ("br", "break", class_run, 1); | |
3134 | add_com_alias ("bre", "break", class_run, 1); | |
3135 | add_com_alias ("brea", "break", class_run, 1); | |
3136 | ||
3137 | add_info ("breakpoints", breakpoints_info, | |
80ba48f5 SG |
3138 | "Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
3139 | The \"Type\" column indicates one of:\n\ | |
423e9664 SG |
3140 | \tbreakpoint - normal breakpoint\n\ |
3141 | \twatchpoint - watchpoint\n\ | |
80ba48f5 SG |
3142 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
3143 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
3144 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
3145 | address and file/line number respectively.\n\n\ | |
3146 | Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
3147 | are set to the address of the last breakpoint listed.\n\n\ | |
3148 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
3149 | breakpoint set."); | |
3150 | ||
9b280a7f JG |
3151 | #if MAINTENANCE_CMDS |
3152 | ||
3153 | add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, | |
bd5635a1 | 3154 | "Status of all breakpoints, or breakpoint number NUMBER.\n\ |
80ba48f5 | 3155 | The \"Type\" column indicates one of:\n\ |
423e9664 SG |
3156 | \tbreakpoint - normal breakpoint\n\ |
3157 | \twatchpoint - watchpoint\n\ | |
3158 | \tlongjmp - internal breakpoint used to step through longjmp()\n\ | |
3159 | \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ | |
3160 | \tuntil - internal breakpoint used by the \"until\" command\n\ | |
3161 | \tfinish - internal breakpoint used by the \"finish\" command\n\ | |
80ba48f5 SG |
3162 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
3163 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
3164 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
3165 | address and file/line number respectively.\n\n\ | |
bd5635a1 RP |
3166 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
3167 | are set to the address of the last breakpoint listed.\n\n\ | |
3168 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
9b280a7f JG |
3169 | breakpoint set.", |
3170 | &maintenanceinfolist); | |
3171 | ||
3172 | #endif /* MAINTENANCE_CMDS */ | |
bd5635a1 RP |
3173 | |
3174 | add_com ("catch", class_breakpoint, catch_command, | |
3175 | "Set breakpoints to catch exceptions that are raised.\n\ | |
3176 | Argument may be a single exception to catch, multiple exceptions\n\ | |
3177 | to catch, or the default exception \"default\". If no arguments\n\ | |
3178 | are given, breakpoints are set at all exception handlers catch clauses\n\ | |
3179 | within the current scope.\n\ | |
3180 | \n\ | |
3181 | A condition specified for the catch applies to all breakpoints set\n\ | |
3182 | with this command\n\ | |
3183 | \n\ | |
3184 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
3185 | ||
3186 | add_com ("watch", class_breakpoint, watch_command, | |
3187 | "Set a watchpoint for an expression.\n\ | |
3188 | A watchpoint stops execution of your program whenever the value of\n\ | |
3189 | an expression changes."); | |
3190 | ||
c8950965 JG |
3191 | add_info ("watchpoints", breakpoints_info, |
3192 | "Synonym for ``info breakpoints''."); | |
bd5635a1 | 3193 | } |
1eeba686 | 3194 | |
2d313932 JK |
3195 | /* OK, when we call objfile_relocate, we need to relocate breakpoints |
3196 | too. breakpoint_re_set is not a good choice--for example, if | |
3197 | addr_string contains just a line number without a file name the | |
3198 | breakpoint might get set in a different file. In general, there is | |
3199 | no need to go all the way back to the user's string (though this might | |
3200 | work if some effort were made to canonicalize it), since symtabs and | |
3201 | everything except addresses are still valid. | |
1eeba686 | 3202 | |
2d313932 JK |
3203 | Probably the best way to solve this is to have each breakpoint save |
3204 | the objfile and the section number that was used to set it (if set | |
3205 | by "*addr", probably it is best to use find_pc_line to get a symtab | |
3206 | and use the objfile and block_line_section for that symtab). Then | |
3207 | objfile_relocate can call fixup_breakpoints with the objfile and | |
3208 | the new_offsets, and it can relocate only the appropriate breakpoints. */ | |
1eeba686 | 3209 | |
2d313932 JK |
3210 | #ifdef IBM6000_TARGET |
3211 | /* But for now, just kludge it based on the concept that before an | |
3212 | objfile is relocated the breakpoint is below 0x10000000, and afterwards | |
3213 | it is higher, so that way we only relocate each breakpoint once. */ | |
1eeba686 | 3214 | |
1eeba686 PB |
3215 | void |
3216 | fixup_breakpoints (low, high, delta) | |
3217 | CORE_ADDR low; | |
3218 | CORE_ADDR high; | |
3219 | CORE_ADDR delta; | |
3220 | { | |
3221 | struct breakpoint *b; | |
1eeba686 PB |
3222 | |
3223 | ALL_BREAKPOINTS (b) | |
3224 | { | |
3225 | if (b->address >= low && b->address <= high) | |
3226 | b->address += delta; | |
3227 | } | |
3228 | } | |
3229 | #endif |