Commit | Line | Data |
---|---|---|
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" | |
199b2450 | 33 | #include "thread.h" |
bd5635a1 | 34 | #include "target.h" |
d3b9c0df | 35 | #include "language.h" |
bd5635a1 | 36 | #include <string.h> |
423e9664 | 37 | #include "demangle.h" |
bd5635a1 | 38 | |
30875e1c SG |
39 | /* local function prototypes */ |
40 | ||
41 | static void | |
42 | catch_command_1 PARAMS ((char *, int, int)); | |
43 | ||
44 | static void | |
45 | enable_delete_command PARAMS ((char *, int)); | |
46 | ||
47 | static void | |
48 | enable_delete_breakpoint PARAMS ((struct breakpoint *)); | |
49 | ||
50 | static void | |
51 | enable_once_command PARAMS ((char *, int)); | |
52 | ||
53 | static void | |
54 | enable_once_breakpoint PARAMS ((struct breakpoint *)); | |
55 | ||
56 | static void | |
57 | disable_command PARAMS ((char *, int)); | |
58 | ||
59 | static void | |
60 | disable_breakpoint PARAMS ((struct breakpoint *)); | |
61 | ||
62 | static void | |
63 | enable_command PARAMS ((char *, int)); | |
64 | ||
65 | static void | |
66 | enable_breakpoint PARAMS ((struct breakpoint *)); | |
67 | ||
68 | static void | |
69 | map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *))); | |
70 | ||
71 | static void | |
72 | ignore_command PARAMS ((char *, int)); | |
73 | ||
74 | static int | |
75 | breakpoint_re_set_one PARAMS ((char *)); | |
76 | ||
77 | static void | |
78 | delete_command PARAMS ((char *, int)); | |
79 | ||
80 | static void | |
81 | clear_command PARAMS ((char *, int)); | |
82 | ||
83 | static void | |
84 | catch_command PARAMS ((char *, int)); | |
85 | ||
86 | static struct symtabs_and_lines | |
87 | get_catch_sals PARAMS ((int)); | |
88 | ||
89 | static void | |
90 | watch_command PARAMS ((char *, int)); | |
91 | ||
999dd04b JL |
92 | static int |
93 | can_use_hardware_watchpoint PARAMS ((struct breakpoint *)); | |
94 | ||
30875e1c SG |
95 | static void |
96 | tbreak_command PARAMS ((char *, int)); | |
97 | ||
98 | static void | |
99 | break_command_1 PARAMS ((char *, int, int)); | |
100 | ||
101 | static void | |
102 | mention PARAMS ((struct breakpoint *)); | |
103 | ||
104 | static struct breakpoint * | |
105 | set_raw_breakpoint PARAMS ((struct symtab_and_line)); | |
106 | ||
107 | static void | |
108 | check_duplicates PARAMS ((CORE_ADDR)); | |
109 | ||
110 | static void | |
111 | describe_other_breakpoints PARAMS ((CORE_ADDR)); | |
112 | ||
30875e1c SG |
113 | static void |
114 | breakpoints_info PARAMS ((char *, int)); | |
115 | ||
116 | static void | |
423e9664 | 117 | breakpoint_1 PARAMS ((int, int)); |
30875e1c SG |
118 | |
119 | static bpstat | |
120 | bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); | |
121 | ||
122 | static int | |
123 | breakpoint_cond_eval PARAMS ((char *)); | |
124 | ||
125 | static void | |
126 | cleanup_executing_breakpoints PARAMS ((int)); | |
127 | ||
128 | static void | |
129 | commands_command PARAMS ((char *, int)); | |
130 | ||
131 | static void | |
132 | condition_command PARAMS ((char *, int)); | |
133 | ||
134 | static int | |
135 | get_number PARAMS ((char **)); | |
136 | ||
137 | static void | |
138 | set_breakpoint_count PARAMS ((int)); | |
139 | ||
999dd04b JL |
140 | static int |
141 | remove_breakpoint PARAMS ((struct breakpoint *)); | |
30875e1c | 142 | |
bd5635a1 RP |
143 | extern int addressprint; /* Print machine addresses? */ |
144 | extern int demangle; /* Print de-mangled symbol names? */ | |
145 | ||
bd5635a1 RP |
146 | /* Are we executing breakpoint commands? */ |
147 | static int executing_breakpoint_commands; | |
148 | ||
cba0d141 JG |
149 | /* Walk the following statement or block through all breakpoints. |
150 | ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current | |
151 | breakpoint. */ | |
152 | ||
bd5635a1 RP |
153 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) |
154 | ||
cba0d141 JG |
155 | #define ALL_BREAKPOINTS_SAFE(b,tmp) \ |
156 | for (b = breakpoint_chain; \ | |
157 | b? (tmp=b->next, 1): 0; \ | |
158 | b = tmp) | |
159 | ||
999dd04b JL |
160 | /* By default no support for hardware watchpoints is assumed. */ |
161 | #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT | |
162 | #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(B) 0 | |
163 | #define target_remove_watchpoint(ADDR,LEN) -1 | |
164 | #define target_insert_watchpoint(ADDR,LEN) -1 | |
165 | #endif | |
166 | ||
bd5635a1 RP |
167 | /* Chain of all breakpoints defined. */ |
168 | ||
05052b63 | 169 | static struct breakpoint *breakpoint_chain; |
bd5635a1 RP |
170 | |
171 | /* Number of last breakpoint made. */ | |
172 | ||
173 | static int breakpoint_count; | |
174 | ||
175 | /* Set breakpoint count to NUM. */ | |
176 | static void | |
177 | set_breakpoint_count (num) | |
178 | int num; | |
179 | { | |
180 | breakpoint_count = num; | |
181 | set_internalvar (lookup_internalvar ("bpnum"), | |
06b6c733 | 182 | value_from_longest (builtin_type_int, (LONGEST) num)); |
bd5635a1 RP |
183 | } |
184 | ||
185 | /* Default address, symtab and line to put a breakpoint at | |
186 | for "break" command with no arg. | |
187 | if default_breakpoint_valid is zero, the other three are | |
188 | not valid, and "break" with no arg is an error. | |
189 | ||
190 | This set by print_stack_frame, which calls set_default_breakpoint. */ | |
191 | ||
192 | int default_breakpoint_valid; | |
193 | CORE_ADDR default_breakpoint_address; | |
194 | struct symtab *default_breakpoint_symtab; | |
195 | int default_breakpoint_line; | |
196 | ||
bd5635a1 RP |
197 | /* Flag indicating extra verbosity for xgdb. */ |
198 | extern int xgdb_verbose; | |
6c803036 JK |
199 | |
200 | static void | |
201 | breakpoints_changed () | |
202 | { | |
203 | if (annotation_level > 1) | |
204 | { | |
205 | target_terminal_ours (); | |
206 | printf_unfiltered ("\n\032\032breakpoints-invalid\n"); | |
207 | } | |
208 | } | |
bd5635a1 RP |
209 | \f |
210 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. | |
211 | Advance *PP after the string and any trailing whitespace. | |
212 | ||
213 | Currently the string can either be a number or "$" followed by the name | |
214 | of a convenience variable. Making it an expression wouldn't work well | |
215 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ | |
216 | static int | |
217 | get_number (pp) | |
218 | char **pp; | |
219 | { | |
220 | int retval; | |
221 | char *p = *pp; | |
222 | ||
223 | if (p == NULL) | |
224 | /* Empty line means refer to the last breakpoint. */ | |
225 | return breakpoint_count; | |
226 | else if (*p == '$') | |
227 | { | |
228 | /* Make a copy of the name, so we can null-terminate it | |
229 | to pass to lookup_internalvar(). */ | |
230 | char *varname; | |
231 | char *start = ++p; | |
82a2edfb | 232 | value_ptr val; |
bd5635a1 RP |
233 | |
234 | while (isalnum (*p) || *p == '_') | |
235 | p++; | |
236 | varname = (char *) alloca (p - start + 1); | |
237 | strncpy (varname, start, p - start); | |
238 | varname[p - start] = '\0'; | |
239 | val = value_of_internalvar (lookup_internalvar (varname)); | |
240 | if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT) | |
241 | error ( | |
242 | "Convenience variables used to specify breakpoints must have integer values." | |
243 | ); | |
244 | retval = (int) value_as_long (val); | |
245 | } | |
246 | else | |
247 | { | |
80ba48f5 SG |
248 | if (*p == '-') |
249 | ++p; | |
bd5635a1 RP |
250 | while (*p >= '0' && *p <= '9') |
251 | ++p; | |
252 | if (p == *pp) | |
253 | /* There is no number here. (e.g. "cond a == b"). */ | |
254 | error_no_arg ("breakpoint number"); | |
255 | retval = atoi (*pp); | |
256 | } | |
257 | if (!(isspace (*p) || *p == '\0')) | |
258 | error ("breakpoint number expected"); | |
259 | while (isspace (*p)) | |
260 | p++; | |
261 | *pp = p; | |
262 | return retval; | |
263 | } | |
264 | \f | |
265 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ | |
266 | ||
267 | static void | |
268 | condition_command (arg, from_tty) | |
269 | char *arg; | |
270 | int from_tty; | |
271 | { | |
272 | register struct breakpoint *b; | |
273 | char *p; | |
274 | register int bnum; | |
275 | ||
276 | if (arg == 0) | |
277 | error_no_arg ("breakpoint number"); | |
278 | ||
279 | p = arg; | |
280 | bnum = get_number (&p); | |
281 | ||
282 | ALL_BREAKPOINTS (b) | |
283 | if (b->number == bnum) | |
284 | { | |
285 | if (b->cond) | |
286 | { | |
c8950965 | 287 | free ((PTR)b->cond); |
bd5635a1 RP |
288 | b->cond = 0; |
289 | } | |
290 | if (b->cond_string != NULL) | |
c8950965 | 291 | free ((PTR)b->cond_string); |
bd5635a1 RP |
292 | |
293 | if (*p == 0) | |
294 | { | |
295 | b->cond = 0; | |
296 | b->cond_string = NULL; | |
297 | if (from_tty) | |
423e9664 | 298 | printf_filtered ("Breakpoint %d now unconditional.\n", bnum); |
bd5635a1 RP |
299 | } |
300 | else | |
301 | { | |
302 | arg = p; | |
303 | /* I don't know if it matters whether this is the string the user | |
304 | typed in or the decompiled expression. */ | |
305 | b->cond_string = savestring (arg, strlen (arg)); | |
d3b9c0df | 306 | b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); |
bd5635a1 RP |
307 | if (*arg) |
308 | error ("Junk at end of expression"); | |
309 | } | |
310 | return; | |
311 | } | |
312 | ||
313 | error ("No breakpoint number %d.", bnum); | |
314 | } | |
315 | ||
bdbd5f50 | 316 | /* ARGSUSED */ |
bd5635a1 RP |
317 | static void |
318 | commands_command (arg, from_tty) | |
319 | char *arg; | |
320 | int from_tty; | |
321 | { | |
322 | register struct breakpoint *b; | |
323 | char *p; | |
324 | register int bnum; | |
325 | struct command_line *l; | |
326 | ||
327 | /* If we allowed this, we would have problems with when to | |
328 | free the storage, if we change the commands currently | |
329 | being read from. */ | |
330 | ||
331 | if (executing_breakpoint_commands) | |
332 | error ("Can't use the \"commands\" command among a breakpoint's commands."); | |
333 | ||
334 | p = arg; | |
335 | bnum = get_number (&p); | |
336 | if (p && *p) | |
337 | error ("Unexpected extra arguments following breakpoint number."); | |
338 | ||
339 | ALL_BREAKPOINTS (b) | |
340 | if (b->number == bnum) | |
341 | { | |
bdbd5f50 | 342 | if (from_tty && input_from_terminal_p ()) |
9b280a7f | 343 | printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\ |
bd5635a1 | 344 | End with a line saying just \"end\".\n", bnum); |
bd5635a1 RP |
345 | l = read_command_lines (); |
346 | free_command_lines (&b->commands); | |
347 | b->commands = l; | |
6c803036 | 348 | breakpoints_changed (); |
bd5635a1 RP |
349 | return; |
350 | } | |
351 | error ("No breakpoint number %d.", bnum); | |
352 | } | |
353 | \f | |
31ef19fc JK |
354 | extern int memory_breakpoint_size; /* from mem-break.c */ |
355 | ||
356 | /* Like target_read_memory() but if breakpoints are inserted, return | |
30875e1c SG |
357 | the shadow contents instead of the breakpoints themselves. |
358 | ||
359 | Read "memory data" from whatever target or inferior we have. | |
360 | Returns zero if successful, errno value if not. EIO is used | |
361 | for address out of bounds. If breakpoints are inserted, returns | |
362 | shadow contents, not the breakpoints themselves. From breakpoint.c. */ | |
363 | ||
31ef19fc JK |
364 | int |
365 | read_memory_nobpt (memaddr, myaddr, len) | |
366 | CORE_ADDR memaddr; | |
367 | char *myaddr; | |
368 | unsigned len; | |
369 | { | |
370 | int status; | |
371 | struct breakpoint *b; | |
372 | ||
373 | if (memory_breakpoint_size < 0) | |
5af4f5f6 JK |
374 | /* No breakpoints on this machine. FIXME: This should be |
375 | dependent on the debugging target. Probably want | |
376 | target_insert_breakpoint to return a size, saying how many | |
377 | bytes of the shadow contents are used, or perhaps have | |
378 | something like target_xfer_shadow. */ | |
31ef19fc JK |
379 | return target_read_memory (memaddr, myaddr, len); |
380 | ||
381 | ALL_BREAKPOINTS (b) | |
382 | { | |
999dd04b JL |
383 | if (b->type == bp_watchpoint |
384 | || b->type == bp_hardware_watchpoint | |
385 | || !b->inserted) | |
31ef19fc JK |
386 | continue; |
387 | else if (b->address + memory_breakpoint_size <= memaddr) | |
388 | /* The breakpoint is entirely before the chunk of memory | |
389 | we are reading. */ | |
390 | continue; | |
391 | else if (b->address >= memaddr + len) | |
392 | /* The breakpoint is entirely after the chunk of memory we | |
393 | are reading. */ | |
394 | continue; | |
395 | else | |
396 | { | |
397 | /* Copy the breakpoint from the shadow contents, and recurse | |
398 | for the things before and after. */ | |
399 | ||
400 | /* Addresses and length of the part of the breakpoint that | |
401 | we need to copy. */ | |
402 | CORE_ADDR membpt = b->address; | |
403 | unsigned int bptlen = memory_breakpoint_size; | |
404 | /* Offset within shadow_contents. */ | |
405 | int bptoffset = 0; | |
406 | ||
407 | if (membpt < memaddr) | |
408 | { | |
409 | /* Only copy the second part of the breakpoint. */ | |
410 | bptlen -= memaddr - membpt; | |
411 | bptoffset = memaddr - membpt; | |
412 | membpt = memaddr; | |
413 | } | |
414 | ||
415 | if (membpt + bptlen > memaddr + len) | |
416 | { | |
417 | /* Only copy the first part of the breakpoint. */ | |
418 | bptlen -= (membpt + bptlen) - (memaddr + len); | |
419 | } | |
420 | ||
4ed3a9ea FF |
421 | memcpy (myaddr + membpt - memaddr, |
422 | b->shadow_contents + bptoffset, bptlen); | |
31ef19fc JK |
423 | |
424 | if (membpt > memaddr) | |
425 | { | |
426 | /* Copy the section of memory before the breakpoint. */ | |
427 | status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr); | |
428 | if (status != 0) | |
429 | return status; | |
430 | } | |
431 | ||
432 | if (membpt + bptlen < memaddr + len) | |
433 | { | |
434 | /* Copy the section of memory after the breakpoint. */ | |
435 | status = read_memory_nobpt | |
436 | (membpt + bptlen, | |
437 | myaddr + membpt + bptlen - memaddr, | |
438 | memaddr + len - (membpt + bptlen)); | |
439 | if (status != 0) | |
440 | return status; | |
441 | } | |
442 | return 0; | |
443 | } | |
444 | } | |
445 | /* Nothing overlaps. Just call read_memory_noerr. */ | |
446 | return target_read_memory (memaddr, myaddr, len); | |
447 | } | |
448 | \f | |
bd5635a1 RP |
449 | /* insert_breakpoints is used when starting or continuing the program. |
450 | remove_breakpoints is used when the program stops. | |
451 | Both return zero if successful, | |
452 | or an `errno' value if could not write the inferior. */ | |
453 | ||
454 | int | |
455 | insert_breakpoints () | |
456 | { | |
457 | register struct breakpoint *b; | |
458 | int val = 0; | |
459 | int disabled_breaks = 0; | |
460 | ||
461 | ALL_BREAKPOINTS (b) | |
30875e1c | 462 | if (b->type != bp_watchpoint |
999dd04b | 463 | && b->type != bp_hardware_watchpoint |
bd5635a1 RP |
464 | && b->enable != disabled |
465 | && ! b->inserted | |
466 | && ! b->duplicate) | |
467 | { | |
468 | val = target_insert_breakpoint(b->address, b->shadow_contents); | |
469 | if (val) | |
470 | { | |
471 | /* Can't set the breakpoint. */ | |
472 | #if defined (DISABLE_UNSETTABLE_BREAK) | |
473 | if (DISABLE_UNSETTABLE_BREAK (b->address)) | |
474 | { | |
475 | val = 0; | |
476 | b->enable = disabled; | |
477 | if (!disabled_breaks) | |
478 | { | |
05052b63 | 479 | target_terminal_ours_for_output (); |
199b2450 | 480 | fprintf_unfiltered (gdb_stderr, |
2d313932 | 481 | "Cannot insert breakpoint %d:\n", b->number); |
bd5635a1 RP |
482 | printf_filtered ("Disabling shared library breakpoints:\n"); |
483 | } | |
484 | disabled_breaks = 1; | |
485 | printf_filtered ("%d ", b->number); | |
486 | } | |
487 | else | |
488 | #endif | |
489 | { | |
05052b63 | 490 | target_terminal_ours_for_output (); |
199b2450 | 491 | fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); |
d3b9c0df | 492 | #ifdef ONE_PROCESS_WRITETEXT |
199b2450 | 493 | fprintf_unfiltered (gdb_stderr, |
2d313932 | 494 | "The same program may be running in another process.\n"); |
d3b9c0df | 495 | #endif |
bd5635a1 RP |
496 | memory_error (val, b->address); /* which bombs us out */ |
497 | } | |
498 | } | |
499 | else | |
500 | b->inserted = 1; | |
501 | } | |
999dd04b JL |
502 | else if (b->type == bp_hardware_watchpoint |
503 | && b->enable == enabled | |
504 | && ! b->inserted | |
505 | && ! b->duplicate) | |
506 | { | |
507 | FRAME saved_frame; | |
508 | int saved_level, within_current_scope; | |
509 | value_ptr mark = value_mark (); | |
510 | value_ptr v; | |
511 | ||
512 | /* Save the current frame and level so we can restore it after | |
513 | evaluating the watchpoint expression on its own frame. */ | |
514 | saved_frame = selected_frame; | |
515 | saved_level = selected_frame_level; | |
516 | ||
517 | /* Determine if the watchpoint is within scope. */ | |
518 | if (b->exp_valid_block == NULL) | |
519 | within_current_scope = 1; | |
520 | else | |
521 | { | |
522 | FRAME fr = find_frame_addr_in_frame_chain (b->watchpoint_frame); | |
523 | within_current_scope = (fr != NULL); | |
524 | if (within_current_scope) | |
525 | select_frame (fr, -1); | |
526 | } | |
527 | ||
528 | if (within_current_scope) | |
529 | { | |
530 | /* Evaluate the expression and cut the chain of values | |
531 | produced off from the value chain. */ | |
532 | v = evaluate_expression (b->exp); | |
533 | value_release_to_mark (mark); | |
534 | ||
535 | b->val_chain = v; | |
536 | b->inserted = 1; | |
537 | ||
538 | /* Look at each value on the value chain. */ | |
539 | for ( ; v; v=v->next) | |
540 | { | |
541 | /* If it's a memory location, then we must watch it. */ | |
542 | if (v->lval == lval_memory) | |
543 | { | |
544 | int addr, len; | |
545 | ||
546 | addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); | |
547 | len = TYPE_LENGTH (VALUE_TYPE (v)); | |
548 | val = target_insert_watchpoint (addr, len); | |
549 | if (val == -1) | |
550 | { | |
551 | b->inserted = 0; | |
552 | break; | |
553 | } | |
554 | val = 0; | |
555 | } | |
556 | } | |
557 | /* Failure to insert a watchpoint on any memory value in the | |
558 | value chain brings us here. */ | |
559 | if (!b->inserted) | |
560 | warning ("Hardware watchpoint %d: Could not insert watchpoint\n", | |
561 | b->number); | |
562 | } | |
563 | else | |
564 | { | |
565 | printf_filtered ("\ | |
566 | Hardware watchpoint %d deleted because the program has left the block in\n\ | |
567 | which its expression is valid.\n", b->number); | |
568 | if (b->related_breakpoint) | |
569 | delete_breakpoint (b->related_breakpoint); | |
570 | delete_breakpoint (b); | |
571 | } | |
572 | ||
573 | /* Restore the frame and level. */ | |
574 | select_frame (saved_frame, saved_level); | |
575 | } | |
bd5635a1 RP |
576 | if (disabled_breaks) |
577 | printf_filtered ("\n"); | |
578 | return val; | |
579 | } | |
580 | ||
999dd04b | 581 | |
bd5635a1 RP |
582 | int |
583 | remove_breakpoints () | |
584 | { | |
585 | register struct breakpoint *b; | |
586 | int val; | |
587 | ||
bd5635a1 | 588 | ALL_BREAKPOINTS (b) |
999dd04b JL |
589 | { |
590 | if (b->inserted) | |
591 | { | |
592 | val = remove_breakpoint (b); | |
593 | if (val != 0) | |
594 | return val; | |
595 | } | |
596 | } | |
597 | return 0; | |
598 | } | |
bd5635a1 | 599 | |
999dd04b JL |
600 | |
601 | static int | |
602 | remove_breakpoint (b) | |
603 | struct breakpoint *b; | |
604 | { | |
605 | int val; | |
606 | ||
607 | if (b->type != bp_watchpoint | |
608 | && b->type != bp_hardware_watchpoint) | |
609 | { | |
610 | val = target_remove_breakpoint(b->address, b->shadow_contents); | |
611 | if (val) | |
612 | return val; | |
613 | b->inserted = 0; | |
614 | } | |
615 | else if (b->type == bp_hardware_watchpoint | |
616 | && b->enable == enabled | |
617 | && ! b->duplicate) | |
618 | { | |
619 | value_ptr v, n; | |
620 | ||
621 | b->inserted = 0; | |
622 | /* Walk down the saved value chain. */ | |
623 | for (v = b->val_chain; v; v = v->next) | |
624 | { | |
625 | /* For each memory reference remove the watchpoint | |
626 | at that address. */ | |
627 | if (v->lval == lval_memory) | |
628 | { | |
629 | int addr, len; | |
630 | ||
631 | addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); | |
632 | len = TYPE_LENGTH (VALUE_TYPE (v)); | |
633 | val = target_remove_watchpoint (addr, len); | |
634 | if (val == -1) | |
635 | b->inserted = 1; | |
636 | val = 0; | |
637 | } | |
638 | } | |
639 | /* Failure to remove any of the hardware watchpoints comes here. */ | |
640 | if (b->inserted) | |
641 | error ("Hardware watchpoint %d: Could not remove watchpoint\n", | |
642 | b->number); | |
643 | ||
644 | /* Free the saved value chain. We will construct a new one | |
645 | the next time the watchpoint is inserted. */ | |
646 | for (v = b->val_chain; v; v = n) | |
647 | { | |
648 | n = v->next; | |
649 | value_free (v); | |
650 | } | |
651 | b->val_chain = NULL; | |
652 | } | |
bd5635a1 RP |
653 | return 0; |
654 | } | |
655 | ||
cf3e377e | 656 | /* Clear the "inserted" flag in all breakpoints. */ |
bd5635a1 RP |
657 | |
658 | void | |
659 | mark_breakpoints_out () | |
660 | { | |
661 | register struct breakpoint *b; | |
662 | ||
663 | ALL_BREAKPOINTS (b) | |
664 | b->inserted = 0; | |
665 | } | |
666 | ||
cf3e377e JK |
667 | /* Clear the "inserted" flag in all breakpoints and delete any breakpoints |
668 | which should go away between runs of the program. */ | |
669 | ||
670 | void | |
671 | breakpoint_init_inferior () | |
672 | { | |
673 | register struct breakpoint *b, *temp; | |
674 | ||
675 | ALL_BREAKPOINTS_SAFE (b, temp) | |
676 | { | |
677 | b->inserted = 0; | |
678 | ||
679 | /* If the call dummy breakpoint is at the entry point it will | |
680 | cause problems when the inferior is rerun, so we better | |
681 | get rid of it. */ | |
682 | if (b->type == bp_call_dummy) | |
683 | delete_breakpoint (b); | |
999dd04b JL |
684 | |
685 | /* Likewise for scope breakpoints. */ | |
686 | if (b->type == bp_watchpoint_scope) | |
687 | delete_breakpoint (b); | |
688 | ||
689 | /* Likewise for watchpoints on local expressions. */ | |
690 | if ((b->type == bp_watchpoint || b->type == bp_hardware_watchpoint) | |
691 | && b->exp_valid_block != NULL) | |
692 | delete_breakpoint (b); | |
cf3e377e JK |
693 | } |
694 | } | |
695 | ||
bd5635a1 RP |
696 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. |
697 | When continuing from a location with a breakpoint, | |
698 | we actually single step once before calling insert_breakpoints. */ | |
699 | ||
700 | int | |
701 | breakpoint_here_p (pc) | |
702 | CORE_ADDR pc; | |
703 | { | |
704 | register struct breakpoint *b; | |
705 | ||
706 | ALL_BREAKPOINTS (b) | |
707 | if (b->enable != disabled && b->address == pc) | |
708 | return 1; | |
709 | ||
710 | return 0; | |
711 | } | |
199b2450 | 712 | |
05052b63 JK |
713 | /* Return nonzero if FRAME is a dummy frame. We can't use PC_IN_CALL_DUMMY |
714 | because figuring out the saved SP would take too much time, at least using | |
715 | get_saved_register on the 68k. This means that for this function to | |
716 | work right a port must use the bp_call_dummy breakpoint. */ | |
717 | ||
718 | int | |
719 | frame_in_dummy (frame) | |
720 | FRAME frame; | |
721 | { | |
722 | struct breakpoint *b; | |
723 | ||
d7e7e851 | 724 | #ifdef CALL_DUMMY |
05052b63 JK |
725 | ALL_BREAKPOINTS (b) |
726 | { | |
d7e7e851 JK |
727 | static unsigned LONGEST dummy[] = CALL_DUMMY; |
728 | ||
05052b63 | 729 | if (b->type == bp_call_dummy |
d7e7e851 JK |
730 | && b->frame == frame->frame |
731 | ||
732 | /* We need to check the PC as well as the frame on the sparc, | |
733 | for signals.exp in the testsuite. */ | |
734 | && (frame->pc | |
735 | >= (b->address | |
736 | - sizeof (dummy) / sizeof (LONGEST) * REGISTER_SIZE)) | |
737 | && frame->pc <= b->address) | |
05052b63 JK |
738 | return 1; |
739 | } | |
d7e7e851 | 740 | #endif /* CALL_DUMMY */ |
05052b63 JK |
741 | return 0; |
742 | } | |
743 | ||
199b2450 TL |
744 | /* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC |
745 | is valid for process/thread PID. */ | |
746 | ||
747 | int | |
748 | breakpoint_thread_match (pc, pid) | |
749 | CORE_ADDR pc; | |
750 | int pid; | |
751 | { | |
752 | struct breakpoint *b; | |
753 | int thread; | |
754 | ||
755 | thread = pid_to_thread_id (pid); | |
756 | ||
757 | ALL_BREAKPOINTS (b) | |
758 | if (b->enable != disabled | |
759 | && b->address == pc | |
760 | && (b->thread == -1 || b->thread == thread)) | |
761 | return 1; | |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
bd5635a1 RP |
766 | \f |
767 | /* bpstat stuff. External routines' interfaces are documented | |
768 | in breakpoint.h. */ | |
30875e1c SG |
769 | |
770 | /* Clear a bpstat so that it says we are not at any breakpoint. | |
771 | Also free any storage that is part of a bpstat. */ | |
772 | ||
bd5635a1 RP |
773 | void |
774 | bpstat_clear (bsp) | |
775 | bpstat *bsp; | |
776 | { | |
777 | bpstat p; | |
778 | bpstat q; | |
779 | ||
780 | if (bsp == 0) | |
781 | return; | |
782 | p = *bsp; | |
783 | while (p != NULL) | |
784 | { | |
785 | q = p->next; | |
786 | if (p->old_val != NULL) | |
787 | value_free (p->old_val); | |
c8950965 | 788 | free ((PTR)p); |
bd5635a1 RP |
789 | p = q; |
790 | } | |
791 | *bsp = NULL; | |
792 | } | |
793 | ||
30875e1c SG |
794 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
795 | is part of the bpstat is copied as well. */ | |
796 | ||
bd5635a1 RP |
797 | bpstat |
798 | bpstat_copy (bs) | |
799 | bpstat bs; | |
800 | { | |
801 | bpstat p = NULL; | |
802 | bpstat tmp; | |
fee933f1 | 803 | bpstat retval = NULL; |
bd5635a1 RP |
804 | |
805 | if (bs == NULL) | |
806 | return bs; | |
807 | ||
808 | for (; bs != NULL; bs = bs->next) | |
809 | { | |
810 | tmp = (bpstat) xmalloc (sizeof (*tmp)); | |
4ed3a9ea | 811 | memcpy (tmp, bs, sizeof (*tmp)); |
bd5635a1 RP |
812 | if (p == NULL) |
813 | /* This is the first thing in the chain. */ | |
814 | retval = tmp; | |
815 | else | |
816 | p->next = tmp; | |
817 | p = tmp; | |
818 | } | |
819 | p->next = NULL; | |
820 | return retval; | |
821 | } | |
822 | ||
30875e1c SG |
823 | /* Find the bpstat associated with this breakpoint */ |
824 | ||
825 | bpstat | |
826 | bpstat_find_breakpoint(bsp, breakpoint) | |
827 | bpstat bsp; | |
828 | struct breakpoint *breakpoint; | |
829 | { | |
830 | if (bsp == NULL) return NULL; | |
831 | ||
832 | for (;bsp != NULL; bsp = bsp->next) { | |
833 | if (bsp->breakpoint_at == breakpoint) return bsp; | |
834 | } | |
835 | return NULL; | |
836 | } | |
837 | ||
838 | /* Return the breakpoint number of the first breakpoint we are stopped | |
839 | at. *BSP upon return is a bpstat which points to the remaining | |
840 | breakpoints stopped at (but which is not guaranteed to be good for | |
841 | anything but further calls to bpstat_num). | |
842 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ | |
843 | ||
bd5635a1 RP |
844 | int |
845 | bpstat_num (bsp) | |
846 | bpstat *bsp; | |
847 | { | |
848 | struct breakpoint *b; | |
849 | ||
850 | if ((*bsp) == NULL) | |
851 | return 0; /* No more breakpoint values */ | |
852 | else | |
853 | { | |
854 | b = (*bsp)->breakpoint_at; | |
855 | *bsp = (*bsp)->next; | |
856 | if (b == NULL) | |
857 | return -1; /* breakpoint that's been deleted since */ | |
858 | else | |
859 | return b->number; /* We have its number */ | |
860 | } | |
861 | } | |
862 | ||
30875e1c SG |
863 | /* Modify BS so that the actions will not be performed. */ |
864 | ||
bd5635a1 RP |
865 | void |
866 | bpstat_clear_actions (bs) | |
867 | bpstat bs; | |
868 | { | |
869 | for (; bs != NULL; bs = bs->next) | |
870 | { | |
871 | bs->commands = NULL; | |
872 | if (bs->old_val != NULL) | |
873 | { | |
874 | value_free (bs->old_val); | |
875 | bs->old_val = NULL; | |
876 | } | |
877 | } | |
878 | } | |
879 | ||
bdbd5f50 JG |
880 | /* Stub for cleaning up our state if we error-out of a breakpoint command */ |
881 | /* ARGSUSED */ | |
882 | static void | |
883 | cleanup_executing_breakpoints (ignore) | |
884 | int ignore; | |
885 | { | |
886 | executing_breakpoint_commands = 0; | |
887 | } | |
888 | ||
bd5635a1 RP |
889 | /* Execute all the commands associated with all the breakpoints at this |
890 | location. Any of these commands could cause the process to proceed | |
891 | beyond this point, etc. We look out for such changes by checking | |
892 | the global "breakpoint_proceeded" after each command. */ | |
30875e1c | 893 | |
bd5635a1 RP |
894 | void |
895 | bpstat_do_actions (bsp) | |
896 | bpstat *bsp; | |
897 | { | |
898 | bpstat bs; | |
bdbd5f50 JG |
899 | struct cleanup *old_chain; |
900 | ||
901 | executing_breakpoint_commands = 1; | |
902 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); | |
bd5635a1 RP |
903 | |
904 | top: | |
905 | bs = *bsp; | |
906 | ||
bd5635a1 RP |
907 | breakpoint_proceeded = 0; |
908 | for (; bs != NULL; bs = bs->next) | |
909 | { | |
910 | while (bs->commands) | |
911 | { | |
912 | char *line = bs->commands->line; | |
913 | bs->commands = bs->commands->next; | |
914 | execute_command (line, 0); | |
915 | /* If the inferior is proceeded by the command, bomb out now. | |
916 | The bpstat chain has been blown away by wait_for_inferior. | |
917 | But since execution has stopped again, there is a new bpstat | |
918 | to look at, so start over. */ | |
919 | if (breakpoint_proceeded) | |
920 | goto top; | |
921 | } | |
922 | } | |
bd5635a1 RP |
923 | |
924 | executing_breakpoint_commands = 0; | |
bdbd5f50 | 925 | discard_cleanups (old_chain); |
bd5635a1 RP |
926 | } |
927 | ||
8af68e4e JK |
928 | /* This is the normal print_it function for a bpstat. In the future, |
929 | much of this logic could (should?) be moved to bpstat_stop_status, | |
930 | by having it set different print_it functions. */ | |
30875e1c | 931 | |
8af68e4e JK |
932 | static int |
933 | print_it_normal (bs) | |
bd5635a1 RP |
934 | bpstat bs; |
935 | { | |
936 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint | |
937 | which has since been deleted. */ | |
8af68e4e | 938 | if (bs->breakpoint_at == NULL |
30875e1c | 939 | || (bs->breakpoint_at->type != bp_breakpoint |
999dd04b JL |
940 | && bs->breakpoint_at->type != bp_watchpoint |
941 | && bs->breakpoint_at->type != bp_hardware_watchpoint)) | |
bd5635a1 | 942 | return 0; |
bd5635a1 | 943 | |
30875e1c | 944 | if (bs->breakpoint_at->type == bp_breakpoint) |
bd5635a1 RP |
945 | { |
946 | /* I think the user probably only wants to see one breakpoint | |
947 | number, not all of them. */ | |
948 | printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); | |
949 | return 0; | |
950 | } | |
951 | ||
952 | if (bs->old_val != NULL) | |
953 | { | |
954 | printf_filtered ("\nWatchpoint %d, ", bs->breakpoint_at->number); | |
199b2450 | 955 | print_expression (bs->breakpoint_at->exp, gdb_stdout); |
bd5635a1 | 956 | printf_filtered ("\nOld value = "); |
199b2450 | 957 | value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default); |
bd5635a1 | 958 | printf_filtered ("\nNew value = "); |
199b2450 | 959 | value_print (bs->breakpoint_at->val, gdb_stdout, 0, |
bd5635a1 RP |
960 | Val_pretty_default); |
961 | printf_filtered ("\n"); | |
962 | value_free (bs->old_val); | |
963 | bs->old_val = NULL; | |
bd2f0c85 JL |
964 | /* More than one watchpoint may have been triggered. */ |
965 | return -1; | |
bd5635a1 | 966 | } |
8af68e4e JK |
967 | /* We can't deal with it. Maybe another member of the bpstat chain can. */ |
968 | return -1; | |
969 | } | |
970 | ||
971 | /* Print a message indicating what happened. Returns nonzero to | |
972 | say that only the source line should be printed after this (zero | |
973 | return means print the frame as well as the source line). */ | |
3f031adf | 974 | /* Currently we always return zero. */ |
8af68e4e JK |
975 | int |
976 | bpstat_print (bs) | |
977 | bpstat bs; | |
978 | { | |
979 | int val; | |
980 | ||
981 | if (bs == NULL) | |
982 | return 0; | |
bd5635a1 | 983 | |
8af68e4e JK |
984 | val = (*bs->print_it) (bs); |
985 | if (val >= 0) | |
986 | return val; | |
987 | ||
fcb887ff JK |
988 | /* Maybe another breakpoint in the chain caused us to stop. |
989 | (Currently all watchpoints go on the bpstat whether hit or | |
990 | not. That probably could (should) be changed, provided care is taken | |
991 | with respect to bpstat_explains_signal). */ | |
992 | if (bs->next) | |
993 | return bpstat_print (bs->next); | |
994 | ||
cabd4da6 | 995 | /* We reached the end of the chain without printing anything. */ |
bd5635a1 RP |
996 | return 0; |
997 | } | |
998 | ||
999 | /* Evaluate the expression EXP and return 1 if value is zero. | |
1000 | This is used inside a catch_errors to evaluate the breakpoint condition. | |
bdbd5f50 | 1001 | The argument is a "struct expression *" that has been cast to char * to |
bd5635a1 RP |
1002 | make it pass through catch_errors. */ |
1003 | ||
1004 | static int | |
1005 | breakpoint_cond_eval (exp) | |
bdbd5f50 | 1006 | char *exp; |
bd5635a1 | 1007 | { |
d3b9c0df | 1008 | return !value_true (evaluate_expression ((struct expression *)exp)); |
bd5635a1 RP |
1009 | } |
1010 | ||
1011 | /* Allocate a new bpstat and chain it to the current one. */ | |
1012 | ||
1013 | static bpstat | |
1014 | bpstat_alloc (b, cbs) | |
1015 | register struct breakpoint *b; | |
1016 | bpstat cbs; /* Current "bs" value */ | |
1017 | { | |
1018 | bpstat bs; | |
1019 | ||
1020 | bs = (bpstat) xmalloc (sizeof (*bs)); | |
1021 | cbs->next = bs; | |
1022 | bs->breakpoint_at = b; | |
1023 | /* If the condition is false, etc., don't do the commands. */ | |
1024 | bs->commands = NULL; | |
bd5635a1 | 1025 | bs->old_val = NULL; |
8af68e4e | 1026 | bs->print_it = print_it_normal; |
bd5635a1 RP |
1027 | return bs; |
1028 | } | |
fa99ebe1 | 1029 | \f |
999dd04b | 1030 | |
bd5635a1 | 1031 | |
8af68e4e JK |
1032 | /* Possible return values for watchpoint_check (this can't be an enum |
1033 | because of check_errors). */ | |
999dd04b JL |
1034 | /* The watchpoint has been deleted. */ |
1035 | #define WP_DELETED 1 | |
8af68e4e JK |
1036 | /* The value has changed. */ |
1037 | #define WP_VALUE_CHANGED 2 | |
1038 | /* The value has not changed. */ | |
1039 | #define WP_VALUE_NOT_CHANGED 3 | |
1040 | ||
1041 | /* Check watchpoint condition. */ | |
1042 | static int | |
1043 | watchpoint_check (p) | |
fe675038 | 1044 | char *p; |
8af68e4e JK |
1045 | { |
1046 | bpstat bs = (bpstat) p; | |
999dd04b JL |
1047 | struct breakpoint *b; |
1048 | FRAME saved_frame, fr; | |
1049 | int within_current_scope, saved_level; | |
1050 | ||
1051 | /* Save the current frame and level so we can restore it after | |
1052 | evaluating the watchpoint expression on its own frame. */ | |
1053 | saved_frame = selected_frame; | |
1054 | saved_level = selected_frame_level; | |
8af68e4e | 1055 | |
fa99ebe1 | 1056 | if (bs->breakpoint_at->exp_valid_block == NULL) |
8af68e4e | 1057 | within_current_scope = 1; |
fa99ebe1 JK |
1058 | else |
1059 | { | |
999dd04b JL |
1060 | fr = find_frame_addr_in_frame_chain (bs->breakpoint_at->watchpoint_frame); |
1061 | within_current_scope = (fr != NULL); | |
fa99ebe1 JK |
1062 | if (within_current_scope) |
1063 | /* If we end up stopping, the current frame will get selected | |
1064 | in normal_stop. So this call to select_frame won't affect | |
1065 | the user. */ | |
1066 | select_frame (fr, -1); | |
1067 | } | |
1068 | ||
8af68e4e JK |
1069 | if (within_current_scope) |
1070 | { | |
1071 | /* We use value_{,free_to_}mark because it could be a | |
1072 | *long* time before we return to the command level and | |
cef4c2e7 PS |
1073 | call free_all_values. We can't call free_all_values because |
1074 | we might be in the middle of evaluating a function call. */ | |
8af68e4e | 1075 | |
82a2edfb JK |
1076 | value_ptr mark = value_mark (); |
1077 | value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp); | |
8af68e4e JK |
1078 | if (!value_equal (bs->breakpoint_at->val, new_val)) |
1079 | { | |
1080 | release_value (new_val); | |
1081 | value_free_to_mark (mark); | |
1082 | bs->old_val = bs->breakpoint_at->val; | |
1083 | bs->breakpoint_at->val = new_val; | |
1084 | /* We will stop here */ | |
999dd04b | 1085 | select_frame (saved_frame, saved_level); |
8af68e4e JK |
1086 | return WP_VALUE_CHANGED; |
1087 | } | |
1088 | else | |
1089 | { | |
1090 | /* Nothing changed, don't do anything. */ | |
1091 | value_free_to_mark (mark); | |
1092 | /* We won't stop here */ | |
999dd04b | 1093 | select_frame (saved_frame, saved_level); |
8af68e4e JK |
1094 | return WP_VALUE_NOT_CHANGED; |
1095 | } | |
1096 | } | |
1097 | else | |
1098 | { | |
1099 | /* This seems like the only logical thing to do because | |
1100 | if we temporarily ignored the watchpoint, then when | |
1101 | we reenter the block in which it is valid it contains | |
1102 | garbage (in the case of a function, it may have two | |
1103 | garbage values, one before and one after the prologue). | |
1104 | So we can't even detect the first assignment to it and | |
1105 | watch after that (since the garbage may or may not equal | |
1106 | the first value assigned). */ | |
8af68e4e | 1107 | printf_filtered ("\ |
999dd04b | 1108 | Watchpoint %d deleted because the program has left the block in\n\ |
8af68e4e | 1109 | which its expression is valid.\n", bs->breakpoint_at->number); |
999dd04b JL |
1110 | if (bs->breakpoint_at->related_breakpoint) |
1111 | delete_breakpoint (bs->breakpoint_at->related_breakpoint); | |
1112 | delete_breakpoint (bs->breakpoint_at); | |
1113 | ||
1114 | select_frame (saved_frame, saved_level); | |
1115 | return WP_DELETED; | |
8af68e4e JK |
1116 | } |
1117 | } | |
1118 | ||
1119 | /* This is used when everything which needs to be printed has | |
1120 | already been printed. But we still want to print the frame. */ | |
1121 | static int | |
cabd4da6 | 1122 | print_it_done (bs) |
8af68e4e JK |
1123 | bpstat bs; |
1124 | { | |
1125 | return 0; | |
1126 | } | |
1127 | ||
cabd4da6 JK |
1128 | /* This is used when nothing should be printed for this bpstat entry. */ |
1129 | ||
1130 | static int | |
1131 | print_it_noop (bs) | |
1132 | bpstat bs; | |
1133 | { | |
1134 | return -1; | |
1135 | } | |
1136 | ||
cb6b0202 JK |
1137 | /* Get a bpstat associated with having just stopped at address *PC |
1138 | and frame address FRAME_ADDRESS. Update *PC to point at the | |
1139 | breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero | |
1140 | if this is known to not be a real breakpoint (it could still be a | |
1141 | watchpoint, though). */ | |
1142 | ||
bd5635a1 RP |
1143 | /* Determine whether we stopped at a breakpoint, etc, or whether we |
1144 | don't understand this stop. Result is a chain of bpstat's such that: | |
1145 | ||
1146 | if we don't understand the stop, the result is a null pointer. | |
1147 | ||
cb6b0202 | 1148 | if we understand why we stopped, the result is not null. |
bd5635a1 RP |
1149 | |
1150 | Each element of the chain refers to a particular breakpoint or | |
1151 | watchpoint at which we have stopped. (We may have stopped for | |
2d313932 | 1152 | several reasons concurrently.) |
bd5635a1 RP |
1153 | |
1154 | Each element of the chain has valid next, breakpoint_at, | |
1155 | commands, FIXME??? fields. | |
1156 | ||
1157 | */ | |
1158 | ||
bd5635a1 | 1159 | bpstat |
cb6b0202 | 1160 | bpstat_stop_status (pc, frame_address, not_a_breakpoint) |
bd5635a1 RP |
1161 | CORE_ADDR *pc; |
1162 | FRAME_ADDR frame_address; | |
cb6b0202 | 1163 | int not_a_breakpoint; |
bd5635a1 RP |
1164 | { |
1165 | register struct breakpoint *b; | |
bd5635a1 | 1166 | CORE_ADDR bp_addr; |
bdbd5f50 | 1167 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1168 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ |
1169 | int real_breakpoint = 0; | |
bdbd5f50 | 1170 | #endif |
bd5635a1 | 1171 | /* Root of the chain of bpstat's */ |
cba0d141 | 1172 | struct bpstat root_bs[1]; |
bd5635a1 RP |
1173 | /* Pointer to the last thing in the chain currently. */ |
1174 | bpstat bs = root_bs; | |
1175 | ||
1176 | /* Get the address where the breakpoint would have been. */ | |
1177 | bp_addr = *pc - DECR_PC_AFTER_BREAK; | |
1178 | ||
1179 | ALL_BREAKPOINTS (b) | |
1180 | { | |
bd5635a1 RP |
1181 | if (b->enable == disabled) |
1182 | continue; | |
30875e1c | 1183 | |
999dd04b JL |
1184 | if (b->type != bp_watchpoint |
1185 | && b->type != bp_hardware_watchpoint | |
1186 | && b->address != bp_addr) | |
bd5635a1 RP |
1187 | continue; |
1188 | ||
999dd04b JL |
1189 | if (b->type != bp_watchpoint |
1190 | && b->type != bp_hardware_watchpoint | |
1191 | && not_a_breakpoint) | |
cb6b0202 JK |
1192 | continue; |
1193 | ||
30875e1c SG |
1194 | /* Come here if it's a watchpoint, or if the break address matches */ |
1195 | ||
bd5635a1 RP |
1196 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ |
1197 | ||
cabd4da6 JK |
1198 | bs->stop = 1; |
1199 | bs->print = 1; | |
bd5635a1 | 1200 | |
999dd04b | 1201 | if (b->type == bp_watchpoint || b->type == bp_hardware_watchpoint) |
bd5635a1 | 1202 | { |
8af68e4e JK |
1203 | static char message1[] = |
1204 | "Error evaluating expression for watchpoint %d\n"; | |
1205 | char message[sizeof (message1) + 30 /* slop */]; | |
1206 | sprintf (message, message1, b->number); | |
fe675038 JK |
1207 | switch (catch_errors (watchpoint_check, (char *) bs, message, |
1208 | RETURN_MASK_ALL)) | |
bd5635a1 | 1209 | { |
999dd04b | 1210 | case WP_DELETED: |
8af68e4e | 1211 | /* We've already printed what needs to be printed. */ |
cabd4da6 | 1212 | bs->print_it = print_it_done; |
8af68e4e JK |
1213 | /* Stop. */ |
1214 | break; | |
1215 | case WP_VALUE_CHANGED: | |
1216 | /* Stop. */ | |
1217 | break; | |
1218 | case WP_VALUE_NOT_CHANGED: | |
1219 | /* Don't stop. */ | |
cabd4da6 JK |
1220 | bs->print_it = print_it_noop; |
1221 | bs->stop = 0; | |
bd5635a1 | 1222 | continue; |
8af68e4e JK |
1223 | default: |
1224 | /* Can't happen. */ | |
1225 | /* FALLTHROUGH */ | |
1226 | case 0: | |
1227 | /* Error from catch_errors. */ | |
999dd04b JL |
1228 | printf_filtered ("Watchpoint %d deleted.\n", b->number); |
1229 | if (b->related_breakpoint) | |
1230 | delete_breakpoint (b->related_breakpoint); | |
1231 | delete_breakpoint (b); | |
8af68e4e | 1232 | /* We've already printed what needs to be printed. */ |
cabd4da6 | 1233 | bs->print_it = print_it_done; |
999dd04b | 1234 | |
8af68e4e JK |
1235 | /* Stop. */ |
1236 | break; | |
bd5635a1 RP |
1237 | } |
1238 | } | |
bdbd5f50 | 1239 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1240 | else |
1241 | real_breakpoint = 1; | |
bdbd5f50 | 1242 | #endif |
bd5635a1 RP |
1243 | |
1244 | if (b->frame && b->frame != frame_address) | |
cabd4da6 | 1245 | bs->stop = 0; |
bd5635a1 RP |
1246 | else |
1247 | { | |
fee933f1 | 1248 | int value_is_zero = 0; |
bd5635a1 RP |
1249 | |
1250 | if (b->cond) | |
1251 | { | |
1252 | /* Need to select the frame, with all that implies | |
1253 | so that the conditions will have the right context. */ | |
1254 | select_frame (get_current_frame (), 0); | |
bdbd5f50 JG |
1255 | value_is_zero |
1256 | = catch_errors (breakpoint_cond_eval, (char *)(b->cond), | |
fe675038 JK |
1257 | "Error in testing breakpoint condition:\n", |
1258 | RETURN_MASK_ALL); | |
06b6c733 | 1259 | /* FIXME-someday, should give breakpoint # */ |
bd5635a1 RP |
1260 | free_all_values (); |
1261 | } | |
bdbd5f50 | 1262 | if (b->cond && value_is_zero) |
bd5635a1 | 1263 | { |
cabd4da6 | 1264 | bs->stop = 0; |
bd5635a1 RP |
1265 | } |
1266 | else if (b->ignore_count > 0) | |
1267 | { | |
1268 | b->ignore_count--; | |
cabd4da6 | 1269 | bs->stop = 0; |
bd5635a1 RP |
1270 | } |
1271 | else | |
1272 | { | |
1273 | /* We will stop here */ | |
30875e1c | 1274 | if (b->disposition == disable) |
bd5635a1 RP |
1275 | b->enable = disabled; |
1276 | bs->commands = b->commands; | |
1277 | if (b->silent) | |
cabd4da6 | 1278 | bs->print = 0; |
2d313932 | 1279 | if (bs->commands && STREQ ("silent", bs->commands->line)) |
bd5635a1 RP |
1280 | { |
1281 | bs->commands = bs->commands->next; | |
cabd4da6 | 1282 | bs->print = 0; |
bd5635a1 RP |
1283 | } |
1284 | } | |
1285 | } | |
cabd4da6 JK |
1286 | /* Print nothing for this entry if we dont stop or if we dont print. */ |
1287 | if (bs->stop == 0 || bs->print == 0) | |
1288 | bs->print_it = print_it_noop; | |
bd5635a1 RP |
1289 | } |
1290 | ||
1291 | bs->next = NULL; /* Terminate the chain */ | |
1292 | bs = root_bs->next; /* Re-grab the head of the chain */ | |
cabd4da6 | 1293 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1294 | if (bs) |
1295 | { | |
bd5635a1 RP |
1296 | if (real_breakpoint) |
1297 | { | |
1298 | *pc = bp_addr; | |
1299 | #if defined (SHIFT_INST_REGS) | |
817ac7f8 | 1300 | SHIFT_INST_REGS(); |
bd5635a1 RP |
1301 | #else /* No SHIFT_INST_REGS. */ |
1302 | write_pc (bp_addr); | |
1303 | #endif /* No SHIFT_INST_REGS. */ | |
1304 | } | |
bd5635a1 | 1305 | } |
cabd4da6 | 1306 | #endif /* DECR_PC_AFTER_BREAK != 0. */ |
999dd04b JL |
1307 | |
1308 | /* The value of a hardware watchpoint hasn't changed, but the | |
1309 | intermediate memory locations we are watching may have. */ | |
1310 | if (bs && ! bs->stop | |
1311 | && bs->breakpoint_at->type == bp_hardware_watchpoint) | |
1312 | { | |
1313 | remove_breakpoints (); | |
1314 | insert_breakpoints (); | |
1315 | } | |
bd5635a1 RP |
1316 | return bs; |
1317 | } | |
cabd4da6 JK |
1318 | \f |
1319 | /* Tell what to do about this bpstat. */ | |
fe675038 | 1320 | struct bpstat_what |
cabd4da6 JK |
1321 | bpstat_what (bs) |
1322 | bpstat bs; | |
1323 | { | |
1324 | /* Classify each bpstat as one of the following. */ | |
1325 | enum class { | |
fe675038 JK |
1326 | /* This bpstat element has no effect on the main_action. */ |
1327 | no_effect = 0, | |
cabd4da6 JK |
1328 | |
1329 | /* There was a watchpoint, stop but don't print. */ | |
1330 | wp_silent, | |
1331 | ||
1332 | /* There was a watchpoint, stop and print. */ | |
1333 | wp_noisy, | |
1334 | ||
1335 | /* There was a breakpoint but we're not stopping. */ | |
1336 | bp_nostop, | |
1337 | ||
1338 | /* There was a breakpoint, stop but don't print. */ | |
1339 | bp_silent, | |
1340 | ||
1341 | /* There was a breakpoint, stop and print. */ | |
1342 | bp_noisy, | |
1343 | ||
1344 | /* We hit the longjmp breakpoint. */ | |
1345 | long_jump, | |
1346 | ||
1347 | /* We hit the longjmp_resume breakpoint. */ | |
1348 | long_resume, | |
1349 | ||
d7e7e851 JK |
1350 | /* We hit the step_resume breakpoint. */ |
1351 | step_resume, | |
1352 | ||
bcc37718 JK |
1353 | /* We hit the through_sigtramp breakpoint. */ |
1354 | through_sig, | |
1355 | ||
cabd4da6 JK |
1356 | /* This is just used to count how many enums there are. */ |
1357 | class_last | |
1358 | }; | |
1359 | ||
1360 | /* Here is the table which drives this routine. So that we can | |
1361 | format it pretty, we define some abbreviations for the | |
1362 | enum bpstat_what codes. */ | |
1363 | #define keep_c BPSTAT_WHAT_KEEP_CHECKING | |
1364 | #define stop_s BPSTAT_WHAT_STOP_SILENT | |
1365 | #define stop_n BPSTAT_WHAT_STOP_NOISY | |
1366 | #define single BPSTAT_WHAT_SINGLE | |
1367 | #define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME | |
1368 | #define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME | |
1369 | #define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE | |
d7e7e851 | 1370 | #define sr BPSTAT_WHAT_STEP_RESUME |
bcc37718 | 1371 | #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP |
d7e7e851 | 1372 | |
cabd4da6 JK |
1373 | /* "Can't happen." Might want to print an error message. |
1374 | abort() is not out of the question, but chances are GDB is just | |
1375 | a bit confused, not unusable. */ | |
1376 | #define err BPSTAT_WHAT_STOP_NOISY | |
1377 | ||
1378 | /* Given an old action and a class, come up with a new action. */ | |
84d59861 JK |
1379 | /* One interesting property of this table is that wp_silent is the same |
1380 | as bp_silent and wp_noisy is the same as bp_noisy. That is because | |
1381 | after stopping, the check for whether to step over a breakpoint | |
1382 | (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without | |
1383 | reference to how we stopped. We retain separate wp_silent and bp_silent | |
1384 | codes in case we want to change that someday. */ | |
d7e7e851 JK |
1385 | |
1386 | /* step_resume entries: a step resume breakpoint overrides another | |
1387 | breakpoint of signal handling (see comment in wait_for_inferior | |
1388 | at first IN_SIGTRAMP where we set the step_resume breakpoint). */ | |
bcc37718 JK |
1389 | /* We handle the through_sigtramp_breakpoint the same way; having both |
1390 | one of those and a step_resume_breakpoint is probably very rare (?). */ | |
d7e7e851 | 1391 | |
fe675038 | 1392 | static const enum bpstat_what_main_action |
cabd4da6 JK |
1393 | table[(int)class_last][(int)BPSTAT_WHAT_LAST] = |
1394 | { | |
1395 | /* old action */ | |
bcc37718 JK |
1396 | /* keep_c stop_s stop_n single setlr clrlr clrlrs sr ts |
1397 | */ | |
1398 | /*no_effect*/ {keep_c,stop_s,stop_n,single, setlr , clrlr , clrlrs, sr, ts}, | |
1399 | /*wp_silent*/ {stop_s,stop_s,stop_n,stop_s, stop_s, stop_s, stop_s, sr, ts}, | |
1400 | /*wp_noisy*/ {stop_n,stop_n,stop_n,stop_n, stop_n, stop_n, stop_n, sr, ts}, | |
1401 | /*bp_nostop*/ {single,stop_s,stop_n,single, setlr , clrlrs, clrlrs, sr, ts}, | |
1402 | /*bp_silent*/ {stop_s,stop_s,stop_n,stop_s, stop_s, stop_s, stop_s, sr, ts}, | |
1403 | /*bp_noisy*/ {stop_n,stop_n,stop_n,stop_n, stop_n, stop_n, stop_n, sr, ts}, | |
1404 | /*long_jump*/ {setlr ,stop_s,stop_n,setlr , err , err , err , sr, ts}, | |
1405 | /*long_resume*/ {clrlr ,stop_s,stop_n,clrlrs, err , err , err , sr, ts}, | |
1406 | /*step_resume*/ {sr ,sr ,sr ,sr , sr , sr , sr , sr, ts}, | |
1407 | /*through_sig*/ {ts ,ts ,ts ,ts , ts , ts , ts , ts, ts} | |
cabd4da6 JK |
1408 | }; |
1409 | #undef keep_c | |
1410 | #undef stop_s | |
1411 | #undef stop_n | |
1412 | #undef single | |
1413 | #undef setlr | |
1414 | #undef clrlr | |
1415 | #undef clrlrs | |
1416 | #undef err | |
bcc37718 JK |
1417 | #undef sr |
1418 | #undef ts | |
fe675038 | 1419 | enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; |
84d59861 | 1420 | struct bpstat_what retval; |
cabd4da6 | 1421 | |
cef4c2e7 | 1422 | retval.call_dummy = 0; |
cabd4da6 JK |
1423 | for (; bs != NULL; bs = bs->next) |
1424 | { | |
fee933f1 | 1425 | enum class bs_class = no_effect; |
cabd4da6 JK |
1426 | if (bs->breakpoint_at == NULL) |
1427 | /* I suspect this can happen if it was a momentary breakpoint | |
1428 | which has since been deleted. */ | |
1429 | continue; | |
1430 | switch (bs->breakpoint_at->type) | |
1431 | { | |
1432 | case bp_breakpoint: | |
1433 | case bp_until: | |
1434 | case bp_finish: | |
1435 | if (bs->stop) | |
1436 | { | |
1437 | if (bs->print) | |
1438 | bs_class = bp_noisy; | |
1439 | else | |
1440 | bs_class = bp_silent; | |
1441 | } | |
1442 | else | |
1443 | bs_class = bp_nostop; | |
1444 | break; | |
1445 | case bp_watchpoint: | |
999dd04b | 1446 | case bp_hardware_watchpoint: |
cabd4da6 JK |
1447 | if (bs->stop) |
1448 | { | |
1449 | if (bs->print) | |
1450 | bs_class = wp_noisy; | |
1451 | else | |
1452 | bs_class = wp_silent; | |
1453 | } | |
1454 | else | |
fe675038 JK |
1455 | /* There was a watchpoint, but we're not stopping. This requires |
1456 | no further action. */ | |
1457 | bs_class = no_effect; | |
cabd4da6 JK |
1458 | break; |
1459 | case bp_longjmp: | |
1460 | bs_class = long_jump; | |
1461 | break; | |
1462 | case bp_longjmp_resume: | |
1463 | bs_class = long_resume; | |
1464 | break; | |
fe675038 | 1465 | case bp_step_resume: |
fe675038 JK |
1466 | if (bs->stop) |
1467 | { | |
d7e7e851 | 1468 | bs_class = step_resume; |
fe675038 JK |
1469 | } |
1470 | else | |
1471 | /* It is for the wrong frame. */ | |
1472 | bs_class = bp_nostop; | |
bcc37718 JK |
1473 | break; |
1474 | case bp_through_sigtramp: | |
1475 | bs_class = through_sig; | |
fe675038 | 1476 | break; |
999dd04b JL |
1477 | case bp_watchpoint_scope: |
1478 | bs_class = bp_nostop; | |
1479 | break; | |
1480 | ||
84d59861 JK |
1481 | case bp_call_dummy: |
1482 | /* Make sure the action is stop (silent or noisy), so infrun.c | |
1483 | pops the dummy frame. */ | |
1484 | bs_class = bp_silent; | |
1485 | retval.call_dummy = 1; | |
bb7b3800 | 1486 | break; |
cabd4da6 JK |
1487 | } |
1488 | current_action = table[(int)bs_class][(int)current_action]; | |
1489 | } | |
84d59861 JK |
1490 | retval.main_action = current_action; |
1491 | return retval; | |
cabd4da6 | 1492 | } |
bd5635a1 | 1493 | |
30875e1c SG |
1494 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
1495 | without hardware support). This isn't related to a specific bpstat, | |
1496 | just to things like whether watchpoints are set. */ | |
1497 | ||
bd5635a1 RP |
1498 | int |
1499 | bpstat_should_step () | |
1500 | { | |
1501 | struct breakpoint *b; | |
1502 | ALL_BREAKPOINTS (b) | |
30875e1c | 1503 | if (b->enable == enabled && b->type == bp_watchpoint) |
bd5635a1 RP |
1504 | return 1; |
1505 | return 0; | |
1506 | } | |
1507 | \f | |
1508 | /* Print information on breakpoint number BNUM, or -1 if all. | |
1509 | If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS | |
1510 | is nonzero, process only watchpoints. */ | |
1511 | ||
1512 | static void | |
c8950965 | 1513 | breakpoint_1 (bnum, allflag) |
bd5635a1 | 1514 | int bnum; |
80ba48f5 | 1515 | int allflag; |
bd5635a1 RP |
1516 | { |
1517 | register struct breakpoint *b; | |
1518 | register struct command_line *l; | |
1519 | register struct symbol *sym; | |
1520 | CORE_ADDR last_addr = (CORE_ADDR)-1; | |
30875e1c SG |
1521 | int found_a_breakpoint = 0; |
1522 | static char *bptypes[] = {"breakpoint", "until", "finish", "watchpoint", | |
999dd04b JL |
1523 | "hardware watchpoint", "longjmp", |
1524 | "longjmp resume", "step resume", | |
1525 | "watchpoint scope", "call dummy" }; | |
80ba48f5 | 1526 | static char *bpdisps[] = {"del", "dis", "keep"}; |
30875e1c | 1527 | static char bpenables[] = "ny"; |
0a62ff36 | 1528 | char wrap_indent[80]; |
30875e1c | 1529 | |
bd5635a1 | 1530 | ALL_BREAKPOINTS (b) |
30875e1c SG |
1531 | if (bnum == -1 |
1532 | || bnum == b->number) | |
bd5635a1 | 1533 | { |
80ba48f5 SG |
1534 | /* We only print out user settable breakpoints unless the allflag is set. */ |
1535 | if (!allflag | |
1536 | && b->type != bp_breakpoint | |
999dd04b JL |
1537 | && b->type != bp_watchpoint |
1538 | && b->type != bp_hardware_watchpoint) | |
80ba48f5 SG |
1539 | continue; |
1540 | ||
30875e1c | 1541 | if (!found_a_breakpoint++) |
80ba48f5 | 1542 | printf_filtered ("Num Type Disp Enb %sWhat\n", |
30875e1c SG |
1543 | addressprint ? "Address " : ""); |
1544 | ||
80ba48f5 | 1545 | printf_filtered ("%-3d %-14s %-4s %-3c ", |
30875e1c | 1546 | b->number, |
423e9664 SG |
1547 | bptypes[(int)b->type], |
1548 | bpdisps[(int)b->disposition], | |
1549 | bpenables[(int)b->enable]); | |
0a62ff36 JK |
1550 | strcpy (wrap_indent, " "); |
1551 | if (addressprint) | |
1552 | strcat (wrap_indent, " "); | |
30875e1c | 1553 | switch (b->type) |
bd5635a1 | 1554 | { |
30875e1c | 1555 | case bp_watchpoint: |
999dd04b | 1556 | case bp_hardware_watchpoint: |
199b2450 | 1557 | print_expression (b->exp, gdb_stdout); |
30875e1c | 1558 | break; |
84d59861 | 1559 | |
30875e1c | 1560 | case bp_breakpoint: |
80ba48f5 SG |
1561 | case bp_until: |
1562 | case bp_finish: | |
1563 | case bp_longjmp: | |
1564 | case bp_longjmp_resume: | |
84d59861 | 1565 | case bp_step_resume: |
bcc37718 | 1566 | case bp_through_sigtramp: |
999dd04b | 1567 | case bp_watchpoint_scope: |
bb7b3800 | 1568 | case bp_call_dummy: |
bd5635a1 | 1569 | if (addressprint) |
cef4c2e7 | 1570 | printf_filtered ("%s ", local_hex_string_custom ((unsigned long) b->address, "08l")); |
bd5635a1 RP |
1571 | |
1572 | last_addr = b->address; | |
d889f6b7 | 1573 | if (b->source_file) |
bd5635a1 RP |
1574 | { |
1575 | sym = find_pc_function (b->address); | |
1576 | if (sym) | |
1577 | { | |
199b2450 TL |
1578 | fputs_filtered ("in ", gdb_stdout); |
1579 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout); | |
0a62ff36 | 1580 | wrap_here (wrap_indent); |
199b2450 | 1581 | fputs_filtered (" at ", gdb_stdout); |
bd5635a1 | 1582 | } |
199b2450 | 1583 | fputs_filtered (b->source_file, gdb_stdout); |
bd5635a1 RP |
1584 | printf_filtered (":%d", b->line_number); |
1585 | } | |
1586 | else | |
199b2450 | 1587 | print_address_symbolic (b->address, gdb_stdout, demangle, " "); |
fee933f1 | 1588 | break; |
bd5635a1 RP |
1589 | } |
1590 | ||
1591 | printf_filtered ("\n"); | |
1592 | ||
1593 | if (b->frame) | |
833e0d94 JK |
1594 | { |
1595 | printf_filtered ("\tstop only in stack frame at "); | |
1596 | print_address_numeric (b->frame, gdb_stdout); | |
1597 | printf_filtered ("\n"); | |
bcc37718 | 1598 | } |
bd5635a1 RP |
1599 | if (b->cond) |
1600 | { | |
1601 | printf_filtered ("\tstop only if "); | |
199b2450 | 1602 | print_expression (b->cond, gdb_stdout); |
bd5635a1 RP |
1603 | printf_filtered ("\n"); |
1604 | } | |
1605 | if (b->ignore_count) | |
1606 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); | |
1607 | if ((l = b->commands)) | |
1608 | while (l) | |
1609 | { | |
199b2450 TL |
1610 | fputs_filtered ("\t", gdb_stdout); |
1611 | fputs_filtered (l->line, gdb_stdout); | |
1612 | fputs_filtered ("\n", gdb_stdout); | |
bd5635a1 RP |
1613 | l = l->next; |
1614 | } | |
1615 | } | |
1616 | ||
fee933f1 RP |
1617 | if (!found_a_breakpoint) |
1618 | { | |
1619 | if (bnum == -1) | |
1620 | printf_filtered ("No breakpoints or watchpoints.\n"); | |
1621 | else | |
1622 | printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum); | |
1623 | } | |
30875e1c SG |
1624 | else |
1625 | /* Compare against (CORE_ADDR)-1 in case some compiler decides | |
1626 | that a comparison of an unsigned with -1 is always false. */ | |
1627 | if (last_addr != (CORE_ADDR)-1) | |
1628 | set_next_address (last_addr); | |
bd5635a1 RP |
1629 | } |
1630 | ||
bdbd5f50 | 1631 | /* ARGSUSED */ |
bd5635a1 RP |
1632 | static void |
1633 | breakpoints_info (bnum_exp, from_tty) | |
1634 | char *bnum_exp; | |
1635 | int from_tty; | |
1636 | { | |
1637 | int bnum = -1; | |
1638 | ||
1639 | if (bnum_exp) | |
1640 | bnum = parse_and_eval_address (bnum_exp); | |
1641 | ||
c8950965 | 1642 | breakpoint_1 (bnum, 0); |
80ba48f5 SG |
1643 | } |
1644 | ||
9b280a7f JG |
1645 | #if MAINTENANCE_CMDS |
1646 | ||
80ba48f5 SG |
1647 | /* ARGSUSED */ |
1648 | static void | |
9b280a7f | 1649 | maintenance_info_breakpoints (bnum_exp, from_tty) |
80ba48f5 SG |
1650 | char *bnum_exp; |
1651 | int from_tty; | |
1652 | { | |
1653 | int bnum = -1; | |
1654 | ||
1655 | if (bnum_exp) | |
1656 | bnum = parse_and_eval_address (bnum_exp); | |
1657 | ||
c8950965 | 1658 | breakpoint_1 (bnum, 1); |
bd5635a1 RP |
1659 | } |
1660 | ||
9b280a7f JG |
1661 | #endif |
1662 | ||
bd5635a1 RP |
1663 | /* Print a message describing any breakpoints set at PC. */ |
1664 | ||
1665 | static void | |
1666 | describe_other_breakpoints (pc) | |
1667 | register CORE_ADDR pc; | |
1668 | { | |
1669 | register int others = 0; | |
1670 | register struct breakpoint *b; | |
1671 | ||
1672 | ALL_BREAKPOINTS (b) | |
1673 | if (b->address == pc) | |
1674 | others++; | |
1675 | if (others > 0) | |
1676 | { | |
833e0d94 | 1677 | printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); |
bd5635a1 RP |
1678 | ALL_BREAKPOINTS (b) |
1679 | if (b->address == pc) | |
1680 | { | |
1681 | others--; | |
833e0d94 JK |
1682 | printf_filtered |
1683 | ("%d%s%s ", | |
1684 | b->number, | |
1685 | (b->enable == disabled) ? " (disabled)" : "", | |
1686 | (others > 1) ? "," : ((others == 1) ? " and" : "")); | |
bd5635a1 | 1687 | } |
833e0d94 JK |
1688 | printf_filtered ("also set at pc "); |
1689 | print_address_numeric (pc, gdb_stdout); | |
1690 | printf_filtered (".\n"); | |
bd5635a1 RP |
1691 | } |
1692 | } | |
1693 | \f | |
1694 | /* Set the default place to put a breakpoint | |
1695 | for the `break' command with no arguments. */ | |
1696 | ||
1697 | void | |
1698 | set_default_breakpoint (valid, addr, symtab, line) | |
1699 | int valid; | |
1700 | CORE_ADDR addr; | |
1701 | struct symtab *symtab; | |
1702 | int line; | |
1703 | { | |
1704 | default_breakpoint_valid = valid; | |
1705 | default_breakpoint_address = addr; | |
1706 | default_breakpoint_symtab = symtab; | |
1707 | default_breakpoint_line = line; | |
1708 | } | |
1709 | ||
1710 | /* Rescan breakpoints at address ADDRESS, | |
1711 | marking the first one as "first" and any others as "duplicates". | |
1712 | This is so that the bpt instruction is only inserted once. */ | |
1713 | ||
1714 | static void | |
1715 | check_duplicates (address) | |
1716 | CORE_ADDR address; | |
1717 | { | |
1718 | register struct breakpoint *b; | |
1719 | register int count = 0; | |
1720 | ||
30875e1c | 1721 | if (address == 0) /* Watchpoints are uninteresting */ |
f266e564 JK |
1722 | return; |
1723 | ||
bd5635a1 RP |
1724 | ALL_BREAKPOINTS (b) |
1725 | if (b->enable != disabled && b->address == address) | |
1726 | { | |
1727 | count++; | |
1728 | b->duplicate = count > 1; | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | /* Low level routine to set a breakpoint. | |
1733 | Takes as args the three things that every breakpoint must have. | |
1734 | Returns the breakpoint object so caller can set other things. | |
1735 | Does not set the breakpoint number! | |
f266e564 JK |
1736 | Does not print anything. |
1737 | ||
1738 | ==> This routine should not be called if there is a chance of later | |
1739 | error(); otherwise it leaves a bogus breakpoint on the chain. Validate | |
1740 | your arguments BEFORE calling this routine! */ | |
bd5635a1 RP |
1741 | |
1742 | static struct breakpoint * | |
1743 | set_raw_breakpoint (sal) | |
1744 | struct symtab_and_line sal; | |
1745 | { | |
1746 | register struct breakpoint *b, *b1; | |
1747 | ||
1748 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); | |
4ed3a9ea | 1749 | memset (b, 0, sizeof (*b)); |
bd5635a1 | 1750 | b->address = sal.pc; |
d889f6b7 JK |
1751 | if (sal.symtab == NULL) |
1752 | b->source_file = NULL; | |
1753 | else | |
1754 | b->source_file = savestring (sal.symtab->filename, | |
1755 | strlen (sal.symtab->filename)); | |
199b2450 | 1756 | b->thread = -1; |
bd5635a1 RP |
1757 | b->line_number = sal.line; |
1758 | b->enable = enabled; | |
1759 | b->next = 0; | |
1760 | b->silent = 0; | |
1761 | b->ignore_count = 0; | |
1762 | b->commands = NULL; | |
30875e1c | 1763 | b->frame = 0; |
bd5635a1 RP |
1764 | |
1765 | /* Add this breakpoint to the end of the chain | |
1766 | so that a list of breakpoints will come out in order | |
1767 | of increasing numbers. */ | |
1768 | ||
1769 | b1 = breakpoint_chain; | |
1770 | if (b1 == 0) | |
1771 | breakpoint_chain = b; | |
1772 | else | |
1773 | { | |
1774 | while (b1->next) | |
1775 | b1 = b1->next; | |
1776 | b1->next = b; | |
1777 | } | |
1778 | ||
1779 | check_duplicates (sal.pc); | |
6c803036 | 1780 | breakpoints_changed (); |
bd5635a1 RP |
1781 | |
1782 | return b; | |
1783 | } | |
1784 | ||
30875e1c | 1785 | static void |
80ba48f5 | 1786 | create_longjmp_breakpoint(func_name) |
30875e1c | 1787 | char *func_name; |
30875e1c | 1788 | { |
30875e1c SG |
1789 | struct symtab_and_line sal; |
1790 | struct breakpoint *b; | |
80ba48f5 | 1791 | static int internal_breakpoint_number = -1; |
30875e1c | 1792 | |
30875e1c SG |
1793 | if (func_name != NULL) |
1794 | { | |
1795 | struct minimal_symbol *m; | |
1796 | ||
1797 | m = lookup_minimal_symbol(func_name, (struct objfile *)NULL); | |
1798 | if (m) | |
2d313932 | 1799 | sal.pc = SYMBOL_VALUE_ADDRESS (m); |
30875e1c SG |
1800 | else |
1801 | return; | |
1802 | } | |
1803 | else | |
1804 | sal.pc = 0; | |
1805 | ||
1806 | sal.symtab = NULL; | |
1807 | sal.line = 0; | |
30875e1c | 1808 | |
80ba48f5 | 1809 | b = set_raw_breakpoint(sal); |
30875e1c SG |
1810 | if (!b) return; |
1811 | ||
80ba48f5 | 1812 | b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume; |
30875e1c SG |
1813 | b->disposition = donttouch; |
1814 | b->enable = disabled; | |
1815 | b->silent = 1; | |
80ba48f5 SG |
1816 | if (func_name) |
1817 | b->addr_string = strsave(func_name); | |
1818 | b->number = internal_breakpoint_number--; | |
30875e1c | 1819 | } |
30875e1c SG |
1820 | |
1821 | /* Call this routine when stepping and nexting to enable a breakpoint if we do | |
1822 | a longjmp(). When we hit that breakpoint, call | |
1823 | set_longjmp_resume_breakpoint() to figure out where we are going. */ | |
1824 | ||
1825 | void | |
1826 | enable_longjmp_breakpoint() | |
1827 | { | |
80ba48f5 SG |
1828 | register struct breakpoint *b; |
1829 | ||
1830 | ALL_BREAKPOINTS (b) | |
1831 | if (b->type == bp_longjmp) | |
9b280a7f JG |
1832 | { |
1833 | b->enable = enabled; | |
1834 | check_duplicates (b->address); | |
1835 | } | |
30875e1c SG |
1836 | } |
1837 | ||
1838 | void | |
1839 | disable_longjmp_breakpoint() | |
1840 | { | |
80ba48f5 SG |
1841 | register struct breakpoint *b; |
1842 | ||
1843 | ALL_BREAKPOINTS (b) | |
9b280a7f | 1844 | if ( b->type == bp_longjmp |
80ba48f5 | 1845 | || b->type == bp_longjmp_resume) |
9b280a7f JG |
1846 | { |
1847 | b->enable = disabled; | |
1848 | check_duplicates (b->address); | |
1849 | } | |
30875e1c SG |
1850 | } |
1851 | ||
1852 | /* Call this after hitting the longjmp() breakpoint. Use this to set a new | |
1853 | breakpoint at the target of the jmp_buf. | |
80ba48f5 SG |
1854 | |
1855 | FIXME - This ought to be done by setting a temporary breakpoint that gets | |
1856 | deleted automatically... | |
30875e1c SG |
1857 | */ |
1858 | ||
1859 | void | |
1860 | set_longjmp_resume_breakpoint(pc, frame) | |
1861 | CORE_ADDR pc; | |
1862 | FRAME frame; | |
1863 | { | |
80ba48f5 SG |
1864 | register struct breakpoint *b; |
1865 | ||
1866 | ALL_BREAKPOINTS (b) | |
1867 | if (b->type == bp_longjmp_resume) | |
1868 | { | |
1869 | b->address = pc; | |
1870 | b->enable = enabled; | |
1871 | if (frame != NULL) | |
1872 | b->frame = FRAME_FP(frame); | |
1873 | else | |
1874 | b->frame = 0; | |
9b280a7f | 1875 | check_duplicates (b->address); |
80ba48f5 SG |
1876 | return; |
1877 | } | |
30875e1c SG |
1878 | } |
1879 | ||
bd5635a1 RP |
1880 | /* Set a breakpoint that will evaporate an end of command |
1881 | at address specified by SAL. | |
1882 | Restrict it to frame FRAME if FRAME is nonzero. */ | |
1883 | ||
30875e1c SG |
1884 | struct breakpoint * |
1885 | set_momentary_breakpoint (sal, frame, type) | |
bd5635a1 RP |
1886 | struct symtab_and_line sal; |
1887 | FRAME frame; | |
30875e1c | 1888 | enum bptype type; |
bd5635a1 RP |
1889 | { |
1890 | register struct breakpoint *b; | |
1891 | b = set_raw_breakpoint (sal); | |
30875e1c SG |
1892 | b->type = type; |
1893 | b->enable = enabled; | |
1894 | b->disposition = donttouch; | |
bd5635a1 | 1895 | b->frame = (frame ? FRAME_FP (frame) : 0); |
30875e1c | 1896 | return b; |
bd5635a1 RP |
1897 | } |
1898 | ||
30875e1c | 1899 | #if 0 |
bd5635a1 RP |
1900 | void |
1901 | clear_momentary_breakpoints () | |
1902 | { | |
1903 | register struct breakpoint *b; | |
1904 | ALL_BREAKPOINTS (b) | |
30875e1c | 1905 | if (b->disposition == delete) |
bd5635a1 RP |
1906 | { |
1907 | delete_breakpoint (b); | |
1908 | break; | |
1909 | } | |
1910 | } | |
30875e1c | 1911 | #endif |
bd5635a1 RP |
1912 | \f |
1913 | /* Tell the user we have just set a breakpoint B. */ | |
1914 | static void | |
1915 | mention (b) | |
1916 | struct breakpoint *b; | |
1917 | { | |
30875e1c | 1918 | switch (b->type) |
bd5635a1 | 1919 | { |
30875e1c | 1920 | case bp_watchpoint: |
bd5635a1 | 1921 | printf_filtered ("Watchpoint %d: ", b->number); |
199b2450 | 1922 | print_expression (b->exp, gdb_stdout); |
30875e1c | 1923 | break; |
999dd04b JL |
1924 | case bp_hardware_watchpoint: |
1925 | printf_filtered ("Hardware watchpoint %d: ", b->number); | |
1926 | print_expression (b->exp, gdb_stdout); | |
1927 | break; | |
30875e1c | 1928 | case bp_breakpoint: |
833e0d94 | 1929 | printf_filtered ("Breakpoint %d at ", b->number); |
bcc37718 | 1930 | print_address_numeric (b->address, gdb_stdout); |
d889f6b7 | 1931 | if (b->source_file) |
bd5635a1 | 1932 | printf_filtered (": file %s, line %d.", |
d889f6b7 | 1933 | b->source_file, b->line_number); |
51b57ded FF |
1934 | break; |
1935 | case bp_until: | |
1936 | case bp_finish: | |
1937 | case bp_longjmp: | |
1938 | case bp_longjmp_resume: | |
fee933f1 | 1939 | case bp_step_resume: |
bcc37718 | 1940 | case bp_through_sigtramp: |
199b2450 | 1941 | case bp_call_dummy: |
999dd04b | 1942 | case bp_watchpoint_scope: |
51b57ded | 1943 | break; |
bd5635a1 RP |
1944 | } |
1945 | printf_filtered ("\n"); | |
1946 | } | |
1947 | ||
1948 | #if 0 | |
1949 | /* Nobody calls this currently. */ | |
1950 | /* Set a breakpoint from a symtab and line. | |
1951 | If TEMPFLAG is nonzero, it is a temporary breakpoint. | |
1952 | ADDR_STRING is a malloc'd string holding the name of where we are | |
1953 | setting the breakpoint. This is used later to re-set it after the | |
1954 | program is relinked and symbols are reloaded. | |
1955 | Print the same confirmation messages that the breakpoint command prints. */ | |
1956 | ||
1957 | void | |
1958 | set_breakpoint (s, line, tempflag, addr_string) | |
1959 | struct symtab *s; | |
1960 | int line; | |
1961 | int tempflag; | |
1962 | char *addr_string; | |
1963 | { | |
1964 | register struct breakpoint *b; | |
1965 | struct symtab_and_line sal; | |
1966 | ||
1967 | sal.symtab = s; | |
1968 | sal.line = line; | |
30875e1c SG |
1969 | sal.pc = 0; |
1970 | resolve_sal_pc (&sal); /* Might error out */ | |
1971 | describe_other_breakpoints (sal.pc); | |
bd5635a1 | 1972 | |
30875e1c SG |
1973 | b = set_raw_breakpoint (sal); |
1974 | set_breakpoint_count (breakpoint_count + 1); | |
1975 | b->number = breakpoint_count; | |
1976 | b->type = bp_breakpoint; | |
1977 | b->cond = 0; | |
1978 | b->addr_string = addr_string; | |
1979 | b->enable = enabled; | |
1980 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 | 1981 | |
30875e1c | 1982 | mention (b); |
bd5635a1 | 1983 | } |
30875e1c | 1984 | #endif /* 0 */ |
bd5635a1 RP |
1985 | \f |
1986 | /* Set a breakpoint according to ARG (function, linenum or *address) | |
1987 | and make it temporary if TEMPFLAG is nonzero. */ | |
1988 | ||
1989 | static void | |
1990 | break_command_1 (arg, tempflag, from_tty) | |
1991 | char *arg; | |
1992 | int tempflag, from_tty; | |
1993 | { | |
1994 | struct symtabs_and_lines sals; | |
1995 | struct symtab_and_line sal; | |
1996 | register struct expression *cond = 0; | |
1997 | register struct breakpoint *b; | |
1998 | ||
1999 | /* Pointers in arg to the start, and one past the end, of the condition. */ | |
2000 | char *cond_start = NULL; | |
fee933f1 | 2001 | char *cond_end = NULL; |
bd5635a1 RP |
2002 | /* Pointers in arg to the start, and one past the end, |
2003 | of the address part. */ | |
2004 | char *addr_start = NULL; | |
fee933f1 | 2005 | char *addr_end = NULL; |
d889f6b7 | 2006 | struct cleanup *old_chain; |
fee933f1 | 2007 | struct cleanup *canonical_strings_chain = NULL; |
d889f6b7 | 2008 | char **canonical = (char **)NULL; |
bd5635a1 | 2009 | int i; |
199b2450 | 2010 | int thread; |
bd5635a1 RP |
2011 | |
2012 | sals.sals = NULL; | |
2013 | sals.nelts = 0; | |
2014 | ||
2015 | sal.line = sal.pc = sal.end = 0; | |
2016 | sal.symtab = 0; | |
2017 | ||
2018 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ | |
2019 | ||
2020 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
2021 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
2022 | { | |
2023 | if (default_breakpoint_valid) | |
2024 | { | |
2025 | sals.sals = (struct symtab_and_line *) | |
2026 | xmalloc (sizeof (struct symtab_and_line)); | |
2027 | sal.pc = default_breakpoint_address; | |
2028 | sal.line = default_breakpoint_line; | |
2029 | sal.symtab = default_breakpoint_symtab; | |
2030 | sals.sals[0] = sal; | |
2031 | sals.nelts = 1; | |
2032 | } | |
2033 | else | |
2034 | error ("No default breakpoint address now."); | |
2035 | } | |
2036 | else | |
2037 | { | |
2038 | addr_start = arg; | |
2039 | ||
2040 | /* Force almost all breakpoints to be in terms of the | |
2041 | current_source_symtab (which is decode_line_1's default). This | |
2042 | should produce the results we want almost all of the time while | |
2043 | leaving default_breakpoint_* alone. */ | |
2044 | if (default_breakpoint_valid | |
2045 | && (!current_source_symtab | |
2046 | || (arg && (*arg == '+' || *arg == '-')))) | |
2047 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
d889f6b7 | 2048 | default_breakpoint_line, &canonical); |
bd5635a1 | 2049 | else |
d889f6b7 | 2050 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical); |
bd5635a1 RP |
2051 | |
2052 | addr_end = arg; | |
2053 | } | |
2054 | ||
2055 | if (! sals.nelts) | |
2056 | return; | |
2057 | ||
d889f6b7 JK |
2058 | /* Make sure that all storage allocated in decode_line_1 gets freed in case |
2059 | the following `for' loop errors out. */ | |
2060 | old_chain = make_cleanup (free, sals.sals); | |
2061 | if (canonical != (char **)NULL) | |
2062 | { | |
2063 | make_cleanup (free, canonical); | |
2064 | canonical_strings_chain = make_cleanup (null_cleanup, 0); | |
2065 | for (i = 0; i < sals.nelts; i++) | |
2066 | { | |
2067 | if (canonical[i] != NULL) | |
2068 | make_cleanup (free, canonical[i]); | |
2069 | } | |
2070 | } | |
2071 | ||
199b2450 TL |
2072 | thread = -1; /* No specific thread yet */ |
2073 | ||
30875e1c SG |
2074 | /* Resolve all line numbers to PC's, and verify that conditions |
2075 | can be parsed, before setting any breakpoints. */ | |
bd5635a1 RP |
2076 | for (i = 0; i < sals.nelts; i++) |
2077 | { | |
199b2450 TL |
2078 | char *tok, *end_tok; |
2079 | int toklen; | |
2080 | ||
30875e1c | 2081 | resolve_sal_pc (&sals.sals[i]); |
bd5635a1 | 2082 | |
199b2450 TL |
2083 | tok = arg; |
2084 | ||
2085 | while (tok && *tok) | |
bd5635a1 | 2086 | { |
199b2450 TL |
2087 | while (*tok == ' ' || *tok == '\t') |
2088 | tok++; | |
2089 | ||
2090 | end_tok = tok; | |
2091 | ||
2092 | while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') | |
2093 | end_tok++; | |
2094 | ||
2095 | toklen = end_tok - tok; | |
2096 | ||
2097 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) | |
2098 | { | |
2099 | tok = cond_start = end_tok + 1; | |
2100 | cond = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); | |
2101 | cond_end = tok; | |
2102 | } | |
2103 | else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) | |
bd5635a1 | 2104 | { |
199b2450 TL |
2105 | char *tmptok; |
2106 | ||
2107 | tok = end_tok + 1; | |
2108 | tmptok = tok; | |
2109 | thread = strtol (tok, &tok, 0); | |
2110 | if (tok == tmptok) | |
2111 | error ("Junk after thread keyword."); | |
2112 | if (!valid_thread_id (thread)) | |
2113 | error ("Unknown thread %d\n", thread); | |
bd5635a1 RP |
2114 | } |
2115 | else | |
2116 | error ("Junk at end of arguments."); | |
2117 | } | |
bd5635a1 RP |
2118 | } |
2119 | ||
d889f6b7 JK |
2120 | /* Remove the canonical strings from the cleanup, they are needed below. */ |
2121 | if (canonical != (char **)NULL) | |
2122 | discard_cleanups (canonical_strings_chain); | |
2123 | ||
30875e1c | 2124 | /* Now set all the breakpoints. */ |
bd5635a1 RP |
2125 | for (i = 0; i < sals.nelts; i++) |
2126 | { | |
2127 | sal = sals.sals[i]; | |
2128 | ||
2129 | if (from_tty) | |
2130 | describe_other_breakpoints (sal.pc); | |
2131 | ||
2132 | b = set_raw_breakpoint (sal); | |
2133 | set_breakpoint_count (breakpoint_count + 1); | |
2134 | b->number = breakpoint_count; | |
30875e1c | 2135 | b->type = bp_breakpoint; |
bd5635a1 | 2136 | b->cond = cond; |
199b2450 | 2137 | b->thread = thread; |
0a97f6c4 | 2138 | |
d889f6b7 JK |
2139 | /* If a canonical line spec is needed use that instead of the |
2140 | command string. */ | |
2141 | if (canonical != (char **)NULL && canonical[i] != NULL) | |
2142 | b->addr_string = canonical[i]; | |
2143 | else if (addr_start) | |
bd5635a1 RP |
2144 | b->addr_string = savestring (addr_start, addr_end - addr_start); |
2145 | if (cond_start) | |
2146 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |
2147 | ||
30875e1c SG |
2148 | b->enable = enabled; |
2149 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 RP |
2150 | |
2151 | mention (b); | |
2152 | } | |
2153 | ||
2154 | if (sals.nelts > 1) | |
2155 | { | |
833e0d94 JK |
2156 | printf_filtered ("Multiple breakpoints were set.\n"); |
2157 | printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
bd5635a1 | 2158 | } |
d889f6b7 | 2159 | do_cleanups (old_chain); |
bd5635a1 RP |
2160 | } |
2161 | ||
30875e1c SG |
2162 | /* Helper function for break_command_1 and disassemble_command. */ |
2163 | ||
2164 | void | |
2165 | resolve_sal_pc (sal) | |
2166 | struct symtab_and_line *sal; | |
2167 | { | |
2168 | CORE_ADDR pc; | |
2169 | ||
2170 | if (sal->pc == 0 && sal->symtab != 0) | |
2171 | { | |
2172 | pc = find_line_pc (sal->symtab, sal->line); | |
2173 | if (pc == 0) | |
2174 | error ("No line %d in file \"%s\".", | |
2175 | sal->line, sal->symtab->filename); | |
2176 | sal->pc = pc; | |
2177 | } | |
2178 | } | |
2179 | ||
bd5635a1 RP |
2180 | void |
2181 | break_command (arg, from_tty) | |
2182 | char *arg; | |
2183 | int from_tty; | |
2184 | { | |
2185 | break_command_1 (arg, 0, from_tty); | |
2186 | } | |
2187 | ||
2188 | static void | |
2189 | tbreak_command (arg, from_tty) | |
2190 | char *arg; | |
2191 | int from_tty; | |
2192 | { | |
2193 | break_command_1 (arg, 1, from_tty); | |
2194 | } | |
2195 | ||
bdbd5f50 | 2196 | /* ARGSUSED */ |
bd5635a1 RP |
2197 | static void |
2198 | watch_command (arg, from_tty) | |
2199 | char *arg; | |
2200 | int from_tty; | |
2201 | { | |
2202 | struct breakpoint *b; | |
2203 | struct symtab_and_line sal; | |
f266e564 JK |
2204 | struct expression *exp; |
2205 | struct block *exp_valid_block; | |
2206 | struct value *val; | |
999dd04b | 2207 | FRAME frame, prev_frame; |
bd5635a1 | 2208 | |
30875e1c | 2209 | sal.pc = 0; |
bd5635a1 RP |
2210 | sal.symtab = NULL; |
2211 | sal.line = 0; | |
2212 | ||
f266e564 JK |
2213 | /* Parse arguments. */ |
2214 | innermost_block = NULL; | |
d3b9c0df | 2215 | exp = parse_expression (arg); |
f266e564 JK |
2216 | exp_valid_block = innermost_block; |
2217 | val = evaluate_expression (exp); | |
2218 | release_value (val); | |
2d313932 JK |
2219 | if (VALUE_LAZY (val)) |
2220 | value_fetch_lazy (val); | |
f266e564 JK |
2221 | |
2222 | /* Now set up the breakpoint. */ | |
bd5635a1 RP |
2223 | b = set_raw_breakpoint (sal); |
2224 | set_breakpoint_count (breakpoint_count + 1); | |
2225 | b->number = breakpoint_count; | |
30875e1c | 2226 | b->disposition = donttouch; |
f266e564 JK |
2227 | b->exp = exp; |
2228 | b->exp_valid_block = exp_valid_block; | |
2229 | b->val = val; | |
bd5635a1 RP |
2230 | b->cond = 0; |
2231 | b->cond_string = NULL; | |
0eaaa46a | 2232 | b->exp_string = savestring (arg, strlen (arg)); |
999dd04b JL |
2233 | |
2234 | frame = block_innermost_frame (exp_valid_block); | |
2235 | if (frame) | |
2236 | { | |
2237 | prev_frame = get_prev_frame (frame); | |
2238 | b->watchpoint_frame = FRAME_FP (frame); | |
2239 | } | |
2240 | else | |
2241 | b->watchpoint_frame = NULL; | |
2242 | ||
2243 | if (can_use_hardware_watchpoint (b)) | |
2244 | b->type = bp_hardware_watchpoint; | |
2245 | else | |
2246 | b->type = bp_watchpoint; | |
2247 | ||
2248 | /* If the expression is "local", then set up a "watchpoint scope" | |
2249 | breakpoint at the point where we've left the scope of the watchpoint | |
2250 | expression. */ | |
2251 | if (innermost_block) | |
2252 | { | |
2253 | struct breakpoint *scope_breakpoint; | |
2254 | struct symtab_and_line scope_sal; | |
2255 | ||
2256 | if (prev_frame) | |
2257 | { | |
2258 | scope_sal.pc = get_frame_pc (prev_frame); | |
2259 | scope_sal.symtab = NULL; | |
2260 | scope_sal.line = 0; | |
2261 | ||
2262 | scope_breakpoint = set_raw_breakpoint (scope_sal); | |
2263 | set_breakpoint_count (breakpoint_count + 1); | |
2264 | scope_breakpoint->number = breakpoint_count; | |
2265 | ||
2266 | scope_breakpoint->type = bp_watchpoint_scope; | |
2267 | scope_breakpoint->enable = enabled; | |
2268 | ||
2269 | /* Automatically delete the breakpoint when it hits. */ | |
2270 | scope_breakpoint->disposition = delete; | |
2271 | ||
2272 | /* Only break in the proper frame (help with recursion). */ | |
2273 | scope_breakpoint->frame = prev_frame->frame; | |
2274 | ||
2275 | /* Set the address at which we will stop. */ | |
2276 | scope_breakpoint->address = get_frame_pc (prev_frame); | |
2277 | ||
2278 | /* The scope breakpoint is related to the watchpoint. We | |
2279 | will need to act on them together. */ | |
2280 | b->related_breakpoint = scope_breakpoint; | |
2281 | } | |
2282 | } | |
2283 | ||
bd5635a1 RP |
2284 | mention (b); |
2285 | } | |
999dd04b JL |
2286 | |
2287 | /* Return nonzero if the watchpoint described by B can be handled | |
2288 | completely in hardware. If the watchpoint can not be handled | |
2289 | in hardware return zero. */ | |
2290 | ||
2291 | static int | |
2292 | can_use_hardware_watchpoint (b) | |
2293 | struct breakpoint *b; | |
2294 | { | |
2295 | value_ptr mark = value_mark (); | |
2296 | value_ptr v = evaluate_expression (b->exp); | |
2297 | int found_memory = 0; | |
2298 | ||
2299 | /* Make sure all the intermediate values are in memory. Also make sure | |
2300 | we found at least one memory expression. Guards against watch 0x12345, | |
2301 | which is meaningless, but could cause errors if one tries to insert a | |
2302 | hardware watchpoint for the constant expression. */ | |
2303 | for ( ; v != mark; v = v->next) | |
2304 | { | |
2305 | if (!(v->lval == lval_memory) | |
2306 | || v->lval == not_lval | |
2307 | || (v->lval != not_lval | |
fad466eb | 2308 | && v->modifiable == 0)) |
999dd04b JL |
2309 | return 0; |
2310 | else | |
2311 | if (v->lval == lval_memory) | |
2312 | found_memory = 1; | |
2313 | } | |
2314 | ||
2315 | /* The expression itself looks suitable for using a hardware | |
2316 | watchpoint, but give the target machine a chance to reject it. */ | |
2317 | return found_memory && TARGET_CAN_USE_HARDWARE_WATCHPOINT (b); | |
2318 | } | |
2319 | ||
bd5635a1 RP |
2320 | \f |
2321 | /* | |
2322 | * Helper routine for the until_command routine in infcmd.c. Here | |
2323 | * because it uses the mechanisms of breakpoints. | |
2324 | */ | |
bdbd5f50 | 2325 | /* ARGSUSED */ |
bd5635a1 RP |
2326 | void |
2327 | until_break_command (arg, from_tty) | |
2328 | char *arg; | |
2329 | int from_tty; | |
2330 | { | |
2331 | struct symtabs_and_lines sals; | |
2332 | struct symtab_and_line sal; | |
2333 | FRAME prev_frame = get_prev_frame (selected_frame); | |
30875e1c SG |
2334 | struct breakpoint *breakpoint; |
2335 | struct cleanup *old_chain; | |
bd5635a1 RP |
2336 | |
2337 | clear_proceed_status (); | |
2338 | ||
2339 | /* Set a breakpoint where the user wants it and at return from | |
2340 | this function */ | |
2341 | ||
2342 | if (default_breakpoint_valid) | |
2343 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
d889f6b7 | 2344 | default_breakpoint_line, (char ***)NULL); |
bd5635a1 | 2345 | else |
d889f6b7 | 2346 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL); |
bd5635a1 RP |
2347 | |
2348 | if (sals.nelts != 1) | |
2349 | error ("Couldn't get information on specified line."); | |
2350 | ||
2351 | sal = sals.sals[0]; | |
c8950965 | 2352 | free ((PTR)sals.sals); /* malloc'd, so freed */ |
bd5635a1 RP |
2353 | |
2354 | if (*arg) | |
2355 | error ("Junk at end of arguments."); | |
2356 | ||
30875e1c | 2357 | resolve_sal_pc (&sal); |
bd5635a1 | 2358 | |
30875e1c | 2359 | breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); |
bd5635a1 | 2360 | |
30875e1c SG |
2361 | old_chain = make_cleanup(delete_breakpoint, breakpoint); |
2362 | ||
bd5635a1 RP |
2363 | /* Keep within the current frame */ |
2364 | ||
2365 | if (prev_frame) | |
2366 | { | |
2367 | struct frame_info *fi; | |
2368 | ||
2369 | fi = get_frame_info (prev_frame); | |
2370 | sal = find_pc_line (fi->pc, 0); | |
2371 | sal.pc = fi->pc; | |
30875e1c SG |
2372 | breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); |
2373 | make_cleanup(delete_breakpoint, breakpoint); | |
bd5635a1 RP |
2374 | } |
2375 | ||
d7e7e851 | 2376 | proceed (-1, TARGET_SIGNAL_DEFAULT, 0); |
30875e1c | 2377 | do_cleanups(old_chain); |
bd5635a1 RP |
2378 | } |
2379 | \f | |
bdbd5f50 JG |
2380 | #if 0 |
2381 | /* These aren't used; I don't konw what they were for. */ | |
bd5635a1 RP |
2382 | /* Set a breakpoint at the catch clause for NAME. */ |
2383 | static int | |
2384 | catch_breakpoint (name) | |
2385 | char *name; | |
2386 | { | |
2387 | } | |
2388 | ||
2389 | static int | |
2390 | disable_catch_breakpoint () | |
2391 | { | |
2392 | } | |
2393 | ||
2394 | static int | |
2395 | delete_catch_breakpoint () | |
2396 | { | |
2397 | } | |
2398 | ||
2399 | static int | |
2400 | enable_catch_breakpoint () | |
2401 | { | |
2402 | } | |
bdbd5f50 | 2403 | #endif /* 0 */ |
bd5635a1 RP |
2404 | |
2405 | struct sal_chain | |
2406 | { | |
2407 | struct sal_chain *next; | |
2408 | struct symtab_and_line sal; | |
2409 | }; | |
2410 | ||
bdbd5f50 JG |
2411 | #if 0 |
2412 | /* This isn't used; I don't know what it was for. */ | |
bd5635a1 RP |
2413 | /* For each catch clause identified in ARGS, run FUNCTION |
2414 | with that clause as an argument. */ | |
2415 | static struct symtabs_and_lines | |
2416 | map_catch_names (args, function) | |
2417 | char *args; | |
2418 | int (*function)(); | |
2419 | { | |
2420 | register char *p = args; | |
2421 | register char *p1; | |
2422 | struct symtabs_and_lines sals; | |
bdbd5f50 | 2423 | #if 0 |
bd5635a1 | 2424 | struct sal_chain *sal_chain = 0; |
bdbd5f50 | 2425 | #endif |
bd5635a1 RP |
2426 | |
2427 | if (p == 0) | |
2428 | error_no_arg ("one or more catch names"); | |
2429 | ||
2430 | sals.nelts = 0; | |
2431 | sals.sals = NULL; | |
2432 | ||
2433 | while (*p) | |
2434 | { | |
2435 | p1 = p; | |
2436 | /* Don't swallow conditional part. */ | |
2437 | if (p1[0] == 'i' && p1[1] == 'f' | |
2438 | && (p1[2] == ' ' || p1[2] == '\t')) | |
2439 | break; | |
2440 | ||
2441 | if (isalpha (*p1)) | |
2442 | { | |
2443 | p1++; | |
2444 | while (isalnum (*p1) || *p1 == '_' || *p1 == '$') | |
2445 | p1++; | |
2446 | } | |
2447 | ||
2448 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
2449 | error ("Arguments must be catch names."); | |
2450 | ||
2451 | *p1 = 0; | |
2452 | #if 0 | |
2453 | if (function (p)) | |
2454 | { | |
2455 | struct sal_chain *next | |
2456 | = (struct sal_chain *)alloca (sizeof (struct sal_chain)); | |
2457 | next->next = sal_chain; | |
2458 | next->sal = get_catch_sal (p); | |
2459 | sal_chain = next; | |
2460 | goto win; | |
2461 | } | |
2462 | #endif | |
199b2450 | 2463 | printf_unfiltered ("No catch clause for exception %s.\n", p); |
bdbd5f50 | 2464 | #if 0 |
bd5635a1 | 2465 | win: |
bdbd5f50 | 2466 | #endif |
bd5635a1 RP |
2467 | p = p1; |
2468 | while (*p == ' ' || *p == '\t') p++; | |
2469 | } | |
2470 | } | |
bdbd5f50 | 2471 | #endif /* 0 */ |
bd5635a1 RP |
2472 | |
2473 | /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ | |
2474 | ||
2475 | static struct symtabs_and_lines | |
2476 | get_catch_sals (this_level_only) | |
2477 | int this_level_only; | |
2478 | { | |
bd5635a1 | 2479 | register struct blockvector *bl; |
777bef06 | 2480 | register struct block *block; |
bd5635a1 | 2481 | int index, have_default = 0; |
777bef06 JK |
2482 | struct frame_info *fi; |
2483 | CORE_ADDR pc; | |
bd5635a1 RP |
2484 | struct symtabs_and_lines sals; |
2485 | struct sal_chain *sal_chain = 0; | |
2486 | char *blocks_searched; | |
2487 | ||
777bef06 JK |
2488 | /* Not sure whether an error message is always the correct response, |
2489 | but it's better than a core dump. */ | |
2490 | if (selected_frame == NULL) | |
2491 | error ("No selected frame."); | |
2492 | block = get_frame_block (selected_frame); | |
2493 | fi = get_frame_info (selected_frame); | |
2494 | pc = fi->pc; | |
2495 | ||
bd5635a1 RP |
2496 | sals.nelts = 0; |
2497 | sals.sals = NULL; | |
2498 | ||
2499 | if (block == 0) | |
2500 | error ("No symbol table info available.\n"); | |
2501 | ||
2502 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); | |
2503 | blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
4ed3a9ea | 2504 | memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
bd5635a1 RP |
2505 | |
2506 | while (block != 0) | |
2507 | { | |
2508 | CORE_ADDR end = BLOCK_END (block) - 4; | |
2509 | int last_index; | |
2510 | ||
2511 | if (bl != blockvector_for_pc (end, &index)) | |
2512 | error ("blockvector blotch"); | |
2513 | if (BLOCKVECTOR_BLOCK (bl, index) != block) | |
2514 | error ("blockvector botch"); | |
2515 | last_index = BLOCKVECTOR_NBLOCKS (bl); | |
2516 | index += 1; | |
2517 | ||
2518 | /* Don't print out blocks that have gone by. */ | |
2519 | while (index < last_index | |
2520 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) | |
2521 | index++; | |
2522 | ||
2523 | while (index < last_index | |
2524 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) | |
2525 | { | |
2526 | if (blocks_searched[index] == 0) | |
2527 | { | |
2528 | struct block *b = BLOCKVECTOR_BLOCK (bl, index); | |
2529 | int nsyms; | |
2530 | register int i; | |
2531 | register struct symbol *sym; | |
2532 | ||
2533 | nsyms = BLOCK_NSYMS (b); | |
2534 | ||
2535 | for (i = 0; i < nsyms; i++) | |
2536 | { | |
2537 | sym = BLOCK_SYM (b, i); | |
2d313932 | 2538 | if (STREQ (SYMBOL_NAME (sym), "default")) |
bd5635a1 RP |
2539 | { |
2540 | if (have_default) | |
2541 | continue; | |
2542 | have_default = 1; | |
2543 | } | |
2544 | if (SYMBOL_CLASS (sym) == LOC_LABEL) | |
2545 | { | |
2546 | struct sal_chain *next = (struct sal_chain *) | |
2547 | alloca (sizeof (struct sal_chain)); | |
2548 | next->next = sal_chain; | |
2549 | next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); | |
2550 | sal_chain = next; | |
2551 | } | |
2552 | } | |
2553 | blocks_searched[index] = 1; | |
2554 | } | |
2555 | index++; | |
2556 | } | |
2557 | if (have_default) | |
2558 | break; | |
2559 | if (sal_chain && this_level_only) | |
2560 | break; | |
2561 | ||
2562 | /* After handling the function's top-level block, stop. | |
2563 | Don't continue to its superblock, the block of | |
2564 | per-file symbols. */ | |
2565 | if (BLOCK_FUNCTION (block)) | |
2566 | break; | |
2567 | block = BLOCK_SUPERBLOCK (block); | |
2568 | } | |
2569 | ||
2570 | if (sal_chain) | |
2571 | { | |
2572 | struct sal_chain *tmp_chain; | |
2573 | ||
2574 | /* Count the number of entries. */ | |
2575 | for (index = 0, tmp_chain = sal_chain; tmp_chain; | |
2576 | tmp_chain = tmp_chain->next) | |
2577 | index++; | |
2578 | ||
2579 | sals.nelts = index; | |
2580 | sals.sals = (struct symtab_and_line *) | |
2581 | xmalloc (index * sizeof (struct symtab_and_line)); | |
2582 | for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) | |
2583 | sals.sals[index] = sal_chain->sal; | |
2584 | } | |
2585 | ||
2586 | return sals; | |
2587 | } | |
2588 | ||
2589 | /* Commands to deal with catching exceptions. */ | |
2590 | ||
30875e1c | 2591 | static void |
bd5635a1 RP |
2592 | catch_command_1 (arg, tempflag, from_tty) |
2593 | char *arg; | |
2594 | int tempflag; | |
2595 | int from_tty; | |
2596 | { | |
2597 | /* First, translate ARG into something we can deal with in terms | |
2598 | of breakpoints. */ | |
2599 | ||
2600 | struct symtabs_and_lines sals; | |
2601 | struct symtab_and_line sal; | |
2602 | register struct expression *cond = 0; | |
2603 | register struct breakpoint *b; | |
2604 | char *save_arg; | |
2605 | int i; | |
bd5635a1 RP |
2606 | |
2607 | sal.line = sal.pc = sal.end = 0; | |
2608 | sal.symtab = 0; | |
2609 | ||
2610 | /* If no arg given, or if first arg is 'if ', all active catch clauses | |
2611 | are breakpointed. */ | |
2612 | ||
2613 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
2614 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
2615 | { | |
2616 | /* Grab all active catch clauses. */ | |
2617 | sals = get_catch_sals (0); | |
2618 | } | |
2619 | else | |
2620 | { | |
2621 | /* Grab selected catch clauses. */ | |
fe675038 | 2622 | error ("catch NAME not implemented"); |
bdbd5f50 JG |
2623 | #if 0 |
2624 | /* This isn't used; I don't know what it was for. */ | |
bd5635a1 | 2625 | sals = map_catch_names (arg, catch_breakpoint); |
bdbd5f50 | 2626 | #endif |
bd5635a1 RP |
2627 | } |
2628 | ||
2629 | if (! sals.nelts) | |
2630 | return; | |
2631 | ||
2632 | save_arg = arg; | |
2633 | for (i = 0; i < sals.nelts; i++) | |
2634 | { | |
30875e1c | 2635 | resolve_sal_pc (&sals.sals[i]); |
bd5635a1 RP |
2636 | |
2637 | while (arg && *arg) | |
2638 | { | |
2639 | if (arg[0] == 'i' && arg[1] == 'f' | |
2640 | && (arg[2] == ' ' || arg[2] == '\t')) | |
30875e1c SG |
2641 | cond = parse_exp_1 ((arg += 2, &arg), |
2642 | block_for_pc (sals.sals[i].pc), 0); | |
bd5635a1 RP |
2643 | else |
2644 | error ("Junk at end of arguments."); | |
2645 | } | |
2646 | arg = save_arg; | |
bd5635a1 RP |
2647 | } |
2648 | ||
2649 | for (i = 0; i < sals.nelts; i++) | |
2650 | { | |
2651 | sal = sals.sals[i]; | |
2652 | ||
2653 | if (from_tty) | |
2654 | describe_other_breakpoints (sal.pc); | |
2655 | ||
2656 | b = set_raw_breakpoint (sal); | |
30875e1c SG |
2657 | set_breakpoint_count (breakpoint_count + 1); |
2658 | b->number = breakpoint_count; | |
2659 | b->type = bp_breakpoint; | |
bd5635a1 | 2660 | b->cond = cond; |
30875e1c SG |
2661 | b->enable = enabled; |
2662 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 | 2663 | |
d889f6b7 | 2664 | mention (b); |
bd5635a1 RP |
2665 | } |
2666 | ||
2667 | if (sals.nelts > 1) | |
2668 | { | |
199b2450 TL |
2669 | printf_unfiltered ("Multiple breakpoints were set.\n"); |
2670 | printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
bd5635a1 | 2671 | } |
c8950965 | 2672 | free ((PTR)sals.sals); |
bd5635a1 RP |
2673 | } |
2674 | ||
bdbd5f50 JG |
2675 | #if 0 |
2676 | /* These aren't used; I don't know what they were for. */ | |
bd5635a1 RP |
2677 | /* Disable breakpoints on all catch clauses described in ARGS. */ |
2678 | static void | |
2679 | disable_catch (args) | |
2680 | char *args; | |
2681 | { | |
2682 | /* Map the disable command to catch clauses described in ARGS. */ | |
2683 | } | |
2684 | ||
2685 | /* Enable breakpoints on all catch clauses described in ARGS. */ | |
2686 | static void | |
2687 | enable_catch (args) | |
2688 | char *args; | |
2689 | { | |
2690 | /* Map the disable command to catch clauses described in ARGS. */ | |
2691 | } | |
2692 | ||
2693 | /* Delete breakpoints on all catch clauses in the active scope. */ | |
2694 | static void | |
2695 | delete_catch (args) | |
2696 | char *args; | |
2697 | { | |
2698 | /* Map the delete command to catch clauses described in ARGS. */ | |
2699 | } | |
bdbd5f50 | 2700 | #endif /* 0 */ |
bd5635a1 RP |
2701 | |
2702 | static void | |
2703 | catch_command (arg, from_tty) | |
2704 | char *arg; | |
2705 | int from_tty; | |
2706 | { | |
2707 | catch_command_1 (arg, 0, from_tty); | |
2708 | } | |
2709 | \f | |
2710 | static void | |
2711 | clear_command (arg, from_tty) | |
2712 | char *arg; | |
2713 | int from_tty; | |
2714 | { | |
2715 | register struct breakpoint *b, *b1; | |
2716 | struct symtabs_and_lines sals; | |
2717 | struct symtab_and_line sal; | |
2718 | register struct breakpoint *found; | |
2719 | int i; | |
2720 | ||
2721 | if (arg) | |
2722 | { | |
2723 | sals = decode_line_spec (arg, 1); | |
2724 | } | |
2725 | else | |
2726 | { | |
2727 | sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); | |
2728 | sal.line = default_breakpoint_line; | |
2729 | sal.symtab = default_breakpoint_symtab; | |
2730 | sal.pc = 0; | |
2731 | if (sal.symtab == 0) | |
2732 | error ("No source file specified."); | |
2733 | ||
2734 | sals.sals[0] = sal; | |
2735 | sals.nelts = 1; | |
2736 | } | |
2737 | ||
2738 | for (i = 0; i < sals.nelts; i++) | |
2739 | { | |
2740 | /* If exact pc given, clear bpts at that pc. | |
2741 | But if sal.pc is zero, clear all bpts on specified line. */ | |
2742 | sal = sals.sals[i]; | |
2743 | found = (struct breakpoint *) 0; | |
2744 | while (breakpoint_chain | |
d889f6b7 JK |
2745 | && (sal.pc |
2746 | ? breakpoint_chain->address == sal.pc | |
2747 | : (breakpoint_chain->source_file != NULL | |
2748 | && sal.symtab != NULL | |
2749 | && STREQ (breakpoint_chain->source_file, | |
2750 | sal.symtab->filename) | |
bd5635a1 RP |
2751 | && breakpoint_chain->line_number == sal.line))) |
2752 | { | |
2753 | b1 = breakpoint_chain; | |
2754 | breakpoint_chain = b1->next; | |
2755 | b1->next = found; | |
2756 | found = b1; | |
2757 | } | |
2758 | ||
2759 | ALL_BREAKPOINTS (b) | |
2760 | while (b->next | |
30875e1c | 2761 | && b->next->type != bp_watchpoint |
999dd04b | 2762 | && b->next->type != bp_hardware_watchpoint |
d889f6b7 JK |
2763 | && (sal.pc |
2764 | ? b->next->address == sal.pc | |
2765 | : (b->next->source_file != NULL | |
2766 | && sal.symtab != NULL | |
2767 | && STREQ (b->next->source_file, sal.symtab->filename) | |
bd5635a1 RP |
2768 | && b->next->line_number == sal.line))) |
2769 | { | |
2770 | b1 = b->next; | |
2771 | b->next = b1->next; | |
2772 | b1->next = found; | |
2773 | found = b1; | |
2774 | } | |
2775 | ||
2776 | if (found == 0) | |
2777 | { | |
2778 | if (arg) | |
2779 | error ("No breakpoint at %s.", arg); | |
2780 | else | |
2781 | error ("No breakpoint at this line."); | |
2782 | } | |
2783 | ||
2784 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ | |
199b2450 | 2785 | if (from_tty) printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : ""); |
6c803036 | 2786 | breakpoints_changed (); |
bd5635a1 RP |
2787 | while (found) |
2788 | { | |
199b2450 | 2789 | if (from_tty) printf_unfiltered ("%d ", found->number); |
bd5635a1 RP |
2790 | b1 = found->next; |
2791 | delete_breakpoint (found); | |
2792 | found = b1; | |
2793 | } | |
199b2450 | 2794 | if (from_tty) putchar_unfiltered ('\n'); |
bd5635a1 | 2795 | } |
c8950965 | 2796 | free ((PTR)sals.sals); |
bd5635a1 RP |
2797 | } |
2798 | \f | |
2799 | /* Delete breakpoint in BS if they are `delete' breakpoints. | |
2800 | This is called after any breakpoint is hit, or after errors. */ | |
2801 | ||
2802 | void | |
2803 | breakpoint_auto_delete (bs) | |
2804 | bpstat bs; | |
2805 | { | |
2806 | for (; bs; bs = bs->next) | |
cef4c2e7 PS |
2807 | if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete |
2808 | && bs->stop) | |
bd5635a1 RP |
2809 | delete_breakpoint (bs->breakpoint_at); |
2810 | } | |
2811 | ||
2812 | /* Delete a breakpoint and clean up all traces of it in the data structures. */ | |
2813 | ||
30875e1c | 2814 | void |
bd5635a1 RP |
2815 | delete_breakpoint (bpt) |
2816 | struct breakpoint *bpt; | |
2817 | { | |
2818 | register struct breakpoint *b; | |
2819 | register bpstat bs; | |
2820 | ||
2821 | if (bpt->inserted) | |
999dd04b JL |
2822 | remove_breakpoint (bpt); |
2823 | ||
bd5635a1 RP |
2824 | if (breakpoint_chain == bpt) |
2825 | breakpoint_chain = bpt->next; | |
2826 | ||
2827 | ALL_BREAKPOINTS (b) | |
2828 | if (b->next == bpt) | |
2829 | { | |
2830 | b->next = bpt->next; | |
2831 | break; | |
2832 | } | |
2833 | ||
2834 | check_duplicates (bpt->address); | |
fe675038 JK |
2835 | /* If this breakpoint was inserted, and there is another breakpoint |
2836 | at the same address, we need to insert the other breakpoint. */ | |
999dd04b JL |
2837 | if (bpt->inserted |
2838 | && bpt->type != bp_hardware_watchpoint) | |
fe675038 JK |
2839 | { |
2840 | ALL_BREAKPOINTS (b) | |
ebad9e90 JK |
2841 | if (b->address == bpt->address |
2842 | && !b->duplicate | |
2843 | && b->enable != disabled) | |
fe675038 JK |
2844 | { |
2845 | int val; | |
2846 | val = target_insert_breakpoint (b->address, b->shadow_contents); | |
2847 | if (val != 0) | |
2848 | { | |
05052b63 | 2849 | target_terminal_ours_for_output (); |
199b2450 | 2850 | fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); |
fe675038 JK |
2851 | memory_error (val, b->address); /* which bombs us out */ |
2852 | } | |
2853 | else | |
2854 | b->inserted = 1; | |
2855 | } | |
2856 | } | |
bd5635a1 RP |
2857 | |
2858 | free_command_lines (&bpt->commands); | |
2859 | if (bpt->cond) | |
d889f6b7 | 2860 | free (bpt->cond); |
bd5635a1 | 2861 | if (bpt->cond_string != NULL) |
d889f6b7 | 2862 | free (bpt->cond_string); |
bd5635a1 | 2863 | if (bpt->addr_string != NULL) |
d889f6b7 | 2864 | free (bpt->addr_string); |
0eaaa46a | 2865 | if (bpt->exp_string != NULL) |
d889f6b7 JK |
2866 | free (bpt->exp_string); |
2867 | if (bpt->source_file != NULL) | |
2868 | free (bpt->source_file); | |
bd5635a1 | 2869 | |
6c803036 | 2870 | breakpoints_changed (); |
bd5635a1 RP |
2871 | |
2872 | /* Be sure no bpstat's are pointing at it after it's been freed. */ | |
05052b63 JK |
2873 | /* FIXME, how can we find all bpstat's? |
2874 | We just check stop_bpstat for now. */ | |
bd5635a1 RP |
2875 | for (bs = stop_bpstat; bs; bs = bs->next) |
2876 | if (bs->breakpoint_at == bpt) | |
2877 | bs->breakpoint_at = NULL; | |
c8950965 | 2878 | free ((PTR)bpt); |
bd5635a1 RP |
2879 | } |
2880 | ||
bd5635a1 RP |
2881 | static void |
2882 | delete_command (arg, from_tty) | |
2883 | char *arg; | |
2884 | int from_tty; | |
2885 | { | |
2886 | ||
2887 | if (arg == 0) | |
2888 | { | |
2889 | /* Ask user only if there are some breakpoints to delete. */ | |
2890 | if (!from_tty | |
2891 | || (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0))) | |
2892 | { | |
2893 | /* No arg; clear all breakpoints. */ | |
2894 | while (breakpoint_chain) | |
2895 | delete_breakpoint (breakpoint_chain); | |
2896 | } | |
2897 | } | |
2898 | else | |
2899 | map_breakpoint_numbers (arg, delete_breakpoint); | |
2900 | } | |
2901 | ||
bdbd5f50 JG |
2902 | /* Reset a breakpoint given it's struct breakpoint * BINT. |
2903 | The value we return ends up being the return value from catch_errors. | |
2904 | Unused in this case. */ | |
2905 | ||
2906 | static int | |
bd5635a1 | 2907 | breakpoint_re_set_one (bint) |
bdbd5f50 | 2908 | char *bint; |
bd5635a1 RP |
2909 | { |
2910 | struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ | |
2911 | int i; | |
2912 | struct symtabs_and_lines sals; | |
bd5635a1 | 2913 | char *s; |
30875e1c | 2914 | enum enable save_enable; |
bd5635a1 | 2915 | |
80ba48f5 | 2916 | switch (b->type) |
bd5635a1 | 2917 | { |
80ba48f5 SG |
2918 | case bp_breakpoint: |
2919 | if (b->addr_string == NULL) | |
2920 | { | |
2921 | /* Anything without a string can't be re-set. */ | |
2922 | delete_breakpoint (b); | |
2923 | return 0; | |
2924 | } | |
30875e1c SG |
2925 | /* In case we have a problem, disable this breakpoint. We'll restore |
2926 | its status if we succeed. */ | |
2927 | save_enable = b->enable; | |
2928 | b->enable = disabled; | |
2929 | ||
bd5635a1 | 2930 | s = b->addr_string; |
d889f6b7 | 2931 | sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0, (char ***)NULL); |
bd5635a1 RP |
2932 | for (i = 0; i < sals.nelts; i++) |
2933 | { | |
30875e1c | 2934 | resolve_sal_pc (&sals.sals[i]); |
fee933f1 RP |
2935 | |
2936 | /* Reparse conditions, they might contain references to the | |
2937 | old symtab. */ | |
2938 | if (b->cond_string != NULL) | |
2939 | { | |
2940 | s = b->cond_string; | |
2941 | if (b->cond) | |
2942 | free ((PTR)b->cond); | |
2943 | b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); | |
2944 | } | |
2945 | ||
2946 | /* We need to re-set the breakpoint if the address changes...*/ | |
d889f6b7 | 2947 | if (b->address != sals.sals[i].pc |
fee933f1 RP |
2948 | /* ...or new and old breakpoints both have source files, and |
2949 | the source file name or the line number changes... */ | |
d889f6b7 JK |
2950 | || (b->source_file != NULL |
2951 | && sals.sals[i].symtab != NULL | |
2952 | && (!STREQ (b->source_file, sals.sals[i].symtab->filename) | |
2953 | || b->line_number != sals.sals[i].line) | |
fee933f1 RP |
2954 | ) |
2955 | /* ...or we switch between having a source file and not having | |
2956 | one. */ | |
2957 | || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL)) | |
2958 | ) | |
bd5635a1 | 2959 | { |
d889f6b7 JK |
2960 | if (b->source_file != NULL) |
2961 | free (b->source_file); | |
2962 | if (sals.sals[i].symtab == NULL) | |
2963 | b->source_file = NULL; | |
2964 | else | |
2965 | b->source_file = | |
2966 | savestring (sals.sals[i].symtab->filename, | |
2967 | strlen (sals.sals[i].symtab->filename)); | |
8537ba60 SG |
2968 | b->line_number = sals.sals[i].line; |
2969 | b->address = sals.sals[i].pc; | |
bd5635a1 | 2970 | |
8537ba60 | 2971 | check_duplicates (b->address); |
bd5635a1 | 2972 | |
8537ba60 | 2973 | mention (b); |
6c803036 JK |
2974 | |
2975 | /* Might be better to do this just once per breakpoint_re_set, | |
2976 | rather than once for every breakpoint. */ | |
2977 | breakpoints_changed (); | |
8537ba60 | 2978 | } |
30875e1c | 2979 | b->enable = save_enable; /* Restore it, this worked. */ |
bd5635a1 | 2980 | } |
c8950965 | 2981 | free ((PTR)sals.sals); |
80ba48f5 | 2982 | break; |
2d313932 | 2983 | |
80ba48f5 | 2984 | case bp_watchpoint: |
999dd04b | 2985 | case bp_hardware_watchpoint: |
0eaaa46a | 2986 | innermost_block = NULL; |
0a97f6c4 JK |
2987 | /* The issue arises of what context to evaluate this in. The same |
2988 | one as when it was set, but what does that mean when symbols have | |
2989 | been re-read? We could save the filename and functionname, but | |
2990 | if the context is more local than that, the best we could do would | |
2991 | be something like how many levels deep and which index at that | |
2992 | particular level, but that's going to be less stable than filenames | |
2993 | or functionnames. */ | |
2994 | /* So for now, just use a global context. */ | |
0eaaa46a JK |
2995 | b->exp = parse_expression (b->exp_string); |
2996 | b->exp_valid_block = innermost_block; | |
2997 | b->val = evaluate_expression (b->exp); | |
2998 | release_value (b->val); | |
2999 | if (VALUE_LAZY (b->val)) | |
3000 | value_fetch_lazy (b->val); | |
3001 | ||
2d313932 JK |
3002 | if (b->cond_string != NULL) |
3003 | { | |
3004 | s = b->cond_string; | |
3005 | b->cond = parse_exp_1 (&s, (struct block *)0, 0); | |
3006 | } | |
cabd4da6 JK |
3007 | if (b->enable == enabled) |
3008 | mention (b); | |
80ba48f5 | 3009 | break; |
2d313932 | 3010 | |
80ba48f5 SG |
3011 | default: |
3012 | printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); | |
2d313932 | 3013 | /* fall through */ |
80ba48f5 SG |
3014 | case bp_until: |
3015 | case bp_finish: | |
3016 | case bp_longjmp: | |
3017 | case bp_longjmp_resume: | |
999dd04b | 3018 | case bp_watchpoint_scope: |
cf3e377e | 3019 | case bp_call_dummy: |
80ba48f5 SG |
3020 | delete_breakpoint (b); |
3021 | break; | |
bd5635a1 | 3022 | } |
80ba48f5 | 3023 | |
bdbd5f50 | 3024 | return 0; |
bd5635a1 RP |
3025 | } |
3026 | ||
3027 | /* Re-set all breakpoints after symbols have been re-loaded. */ | |
3028 | void | |
3029 | breakpoint_re_set () | |
3030 | { | |
cba0d141 | 3031 | struct breakpoint *b, *temp; |
30875e1c SG |
3032 | static char message1[] = "Error in re-setting breakpoint %d:\n"; |
3033 | char message[sizeof (message1) + 30 /* slop */]; | |
bd5635a1 | 3034 | |
cba0d141 | 3035 | ALL_BREAKPOINTS_SAFE (b, temp) |
bd5635a1 | 3036 | { |
2d313932 | 3037 | sprintf (message, message1, b->number); /* Format possible error msg */ |
fe675038 JK |
3038 | catch_errors (breakpoint_re_set_one, (char *) b, message, |
3039 | RETURN_MASK_ALL); | |
bd5635a1 RP |
3040 | } |
3041 | ||
80ba48f5 SG |
3042 | create_longjmp_breakpoint("longjmp"); |
3043 | create_longjmp_breakpoint("_longjmp"); | |
3044 | create_longjmp_breakpoint("siglongjmp"); | |
3045 | create_longjmp_breakpoint(NULL); | |
3046 | ||
1eeba686 PB |
3047 | #if 0 |
3048 | /* Took this out (temporaliy at least), since it produces an extra | |
3049 | blank line at startup. This messes up the gdbtests. -PB */ | |
bd5635a1 RP |
3050 | /* Blank line to finish off all those mention() messages we just printed. */ |
3051 | printf_filtered ("\n"); | |
1eeba686 | 3052 | #endif |
bd5635a1 RP |
3053 | } |
3054 | \f | |
3055 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |
3056 | If from_tty is nonzero, it prints a message to that effect, | |
3057 | which ends with a period (no newline). */ | |
3058 | ||
3059 | void | |
3060 | set_ignore_count (bptnum, count, from_tty) | |
3061 | int bptnum, count, from_tty; | |
3062 | { | |
3063 | register struct breakpoint *b; | |
3064 | ||
3065 | if (count < 0) | |
3066 | count = 0; | |
3067 | ||
3068 | ALL_BREAKPOINTS (b) | |
3069 | if (b->number == bptnum) | |
3070 | { | |
3071 | b->ignore_count = count; | |
3072 | if (!from_tty) | |
3073 | return; | |
3074 | else if (count == 0) | |
423e9664 SG |
3075 | printf_filtered ("Will stop next time breakpoint %d is reached.", |
3076 | bptnum); | |
bd5635a1 | 3077 | else if (count == 1) |
423e9664 SG |
3078 | printf_filtered ("Will ignore next crossing of breakpoint %d.", |
3079 | bptnum); | |
bd5635a1 | 3080 | else |
423e9664 | 3081 | printf_filtered ("Will ignore next %d crossings of breakpoint %d.", |
bd5635a1 | 3082 | count, bptnum); |
6c803036 | 3083 | breakpoints_changed (); |
bd5635a1 RP |
3084 | return; |
3085 | } | |
3086 | ||
3087 | error ("No breakpoint number %d.", bptnum); | |
3088 | } | |
3089 | ||
3090 | /* Clear the ignore counts of all breakpoints. */ | |
3091 | void | |
3092 | breakpoint_clear_ignore_counts () | |
3093 | { | |
3094 | struct breakpoint *b; | |
3095 | ||
3096 | ALL_BREAKPOINTS (b) | |
3097 | b->ignore_count = 0; | |
3098 | } | |
3099 | ||
3100 | /* Command to set ignore-count of breakpoint N to COUNT. */ | |
3101 | ||
3102 | static void | |
3103 | ignore_command (args, from_tty) | |
3104 | char *args; | |
3105 | int from_tty; | |
3106 | { | |
3107 | char *p = args; | |
3108 | register int num; | |
3109 | ||
3110 | if (p == 0) | |
3111 | error_no_arg ("a breakpoint number"); | |
3112 | ||
3113 | num = get_number (&p); | |
3114 | ||
3115 | if (*p == 0) | |
3116 | error ("Second argument (specified ignore-count) is missing."); | |
3117 | ||
bdbd5f50 JG |
3118 | set_ignore_count (num, |
3119 | longest_to_int (value_as_long (parse_and_eval (p))), | |
3120 | from_tty); | |
423e9664 | 3121 | printf_filtered ("\n"); |
6c803036 | 3122 | breakpoints_changed (); |
bd5635a1 RP |
3123 | } |
3124 | \f | |
3125 | /* Call FUNCTION on each of the breakpoints | |
3126 | whose numbers are given in ARGS. */ | |
3127 | ||
3128 | static void | |
3129 | map_breakpoint_numbers (args, function) | |
3130 | char *args; | |
30875e1c | 3131 | void (*function) PARAMS ((struct breakpoint *)); |
bd5635a1 RP |
3132 | { |
3133 | register char *p = args; | |
3134 | char *p1; | |
3135 | register int num; | |
3136 | register struct breakpoint *b; | |
3137 | ||
3138 | if (p == 0) | |
3139 | error_no_arg ("one or more breakpoint numbers"); | |
3140 | ||
3141 | while (*p) | |
3142 | { | |
3143 | p1 = p; | |
3144 | ||
3145 | num = get_number (&p1); | |
3146 | ||
3147 | ALL_BREAKPOINTS (b) | |
3148 | if (b->number == num) | |
3149 | { | |
999dd04b | 3150 | struct breakpoint *related_breakpoint = b->related_breakpoint; |
bd5635a1 | 3151 | function (b); |
999dd04b JL |
3152 | if (related_breakpoint) |
3153 | function (related_breakpoint); | |
bd5635a1 RP |
3154 | goto win; |
3155 | } | |
199b2450 | 3156 | printf_unfiltered ("No breakpoint number %d.\n", num); |
bd5635a1 RP |
3157 | win: |
3158 | p = p1; | |
3159 | } | |
3160 | } | |
3161 | ||
3162 | static void | |
3163 | enable_breakpoint (bpt) | |
3164 | struct breakpoint *bpt; | |
3165 | { | |
fee933f1 | 3166 | FRAME save_selected_frame = NULL; |
fa99ebe1 JK |
3167 | int save_selected_frame_level = -1; |
3168 | ||
bd5635a1 RP |
3169 | bpt->enable = enabled; |
3170 | ||
6c803036 | 3171 | breakpoints_changed (); |
bd5635a1 RP |
3172 | |
3173 | check_duplicates (bpt->address); | |
999dd04b | 3174 | if (bpt->type == bp_watchpoint || bpt->type == bp_hardware_watchpoint) |
bd5635a1 | 3175 | { |
fa99ebe1 | 3176 | if (bpt->exp_valid_block != NULL) |
f266e564 | 3177 | { |
999dd04b | 3178 | FRAME fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame); |
fa99ebe1 JK |
3179 | if (fr == NULL) |
3180 | { | |
3181 | printf_filtered ("\ | |
f266e564 JK |
3182 | Cannot enable watchpoint %d because the block in which its expression\n\ |
3183 | is valid is not currently in scope.\n", bpt->number); | |
fa99ebe1 JK |
3184 | bpt->enable = disabled; |
3185 | return; | |
3186 | } | |
999dd04b | 3187 | |
fa99ebe1 JK |
3188 | save_selected_frame = selected_frame; |
3189 | save_selected_frame_level = selected_frame_level; | |
3190 | select_frame (fr, -1); | |
f266e564 JK |
3191 | } |
3192 | ||
bd5635a1 RP |
3193 | value_free (bpt->val); |
3194 | ||
3195 | bpt->val = evaluate_expression (bpt->exp); | |
3196 | release_value (bpt->val); | |
2d313932 JK |
3197 | if (VALUE_LAZY (bpt->val)) |
3198 | value_fetch_lazy (bpt->val); | |
fa99ebe1 JK |
3199 | |
3200 | if (save_selected_frame_level >= 0) | |
3201 | select_frame (save_selected_frame, save_selected_frame_level); | |
bd5635a1 RP |
3202 | } |
3203 | } | |
3204 | ||
bdbd5f50 | 3205 | /* ARGSUSED */ |
bd5635a1 RP |
3206 | static void |
3207 | enable_command (args, from_tty) | |
3208 | char *args; | |
3209 | int from_tty; | |
3210 | { | |
3211 | struct breakpoint *bpt; | |
3212 | if (args == 0) | |
3213 | ALL_BREAKPOINTS (bpt) | |
423e9664 SG |
3214 | switch (bpt->type) |
3215 | { | |
3216 | case bp_breakpoint: | |
3217 | case bp_watchpoint: | |
999dd04b | 3218 | case bp_hardware_watchpoint: |
423e9664 SG |
3219 | enable_breakpoint (bpt); |
3220 | default: | |
3221 | continue; | |
3222 | } | |
bd5635a1 RP |
3223 | else |
3224 | map_breakpoint_numbers (args, enable_breakpoint); | |
3225 | } | |
3226 | ||
3227 | static void | |
3228 | disable_breakpoint (bpt) | |
3229 | struct breakpoint *bpt; | |
3230 | { | |
999dd04b JL |
3231 | /* Never disable a watchpoint scope breakpoint; we want to |
3232 | hit them when we leave scope so we can delete both the | |
3233 | watchpoint and its scope breakpoint at that time. */ | |
3234 | if (bpt->type == bp_watchpoint_scope) | |
3235 | return; | |
3236 | ||
bd5635a1 RP |
3237 | bpt->enable = disabled; |
3238 | ||
6c803036 | 3239 | breakpoints_changed (); |
bd5635a1 RP |
3240 | |
3241 | check_duplicates (bpt->address); | |
3242 | } | |
3243 | ||
bdbd5f50 | 3244 | /* ARGSUSED */ |
bd5635a1 RP |
3245 | static void |
3246 | disable_command (args, from_tty) | |
3247 | char *args; | |
3248 | int from_tty; | |
3249 | { | |
3250 | register struct breakpoint *bpt; | |
3251 | if (args == 0) | |
3252 | ALL_BREAKPOINTS (bpt) | |
423e9664 SG |
3253 | switch (bpt->type) |
3254 | { | |
3255 | case bp_breakpoint: | |
3256 | case bp_watchpoint: | |
999dd04b | 3257 | case bp_hardware_watchpoint: |
423e9664 SG |
3258 | disable_breakpoint (bpt); |
3259 | default: | |
3260 | continue; | |
3261 | } | |
bd5635a1 RP |
3262 | else |
3263 | map_breakpoint_numbers (args, disable_breakpoint); | |
3264 | } | |
3265 | ||
3266 | static void | |
3267 | enable_once_breakpoint (bpt) | |
3268 | struct breakpoint *bpt; | |
3269 | { | |
30875e1c SG |
3270 | bpt->enable = enabled; |
3271 | bpt->disposition = disable; | |
bd5635a1 RP |
3272 | |
3273 | check_duplicates (bpt->address); | |
6c803036 | 3274 | breakpoints_changed (); |
bd5635a1 RP |
3275 | } |
3276 | ||
bdbd5f50 | 3277 | /* ARGSUSED */ |
bd5635a1 RP |
3278 | static void |
3279 | enable_once_command (args, from_tty) | |
3280 | char *args; | |
3281 | int from_tty; | |
3282 | { | |
3283 | map_breakpoint_numbers (args, enable_once_breakpoint); | |
3284 | } | |
3285 | ||
3286 | static void | |
3287 | enable_delete_breakpoint (bpt) | |
3288 | struct breakpoint *bpt; | |
3289 | { | |
30875e1c SG |
3290 | bpt->enable = enabled; |
3291 | bpt->disposition = delete; | |
bd5635a1 RP |
3292 | |
3293 | check_duplicates (bpt->address); | |
6c803036 | 3294 | breakpoints_changed (); |
bd5635a1 RP |
3295 | } |
3296 | ||
bdbd5f50 | 3297 | /* ARGSUSED */ |
bd5635a1 RP |
3298 | static void |
3299 | enable_delete_command (args, from_tty) | |
3300 | char *args; | |
3301 | int from_tty; | |
3302 | { | |
3303 | map_breakpoint_numbers (args, enable_delete_breakpoint); | |
3304 | } | |
3305 | \f | |
3306 | /* | |
3307 | * Use default_breakpoint_'s, or nothing if they aren't valid. | |
3308 | */ | |
3309 | struct symtabs_and_lines | |
3310 | decode_line_spec_1 (string, funfirstline) | |
3311 | char *string; | |
3312 | int funfirstline; | |
3313 | { | |
3314 | struct symtabs_and_lines sals; | |
3315 | if (string == 0) | |
3316 | error ("Empty line specification."); | |
3317 | if (default_breakpoint_valid) | |
3318 | sals = decode_line_1 (&string, funfirstline, | |
d889f6b7 JK |
3319 | default_breakpoint_symtab, default_breakpoint_line, |
3320 | (char ***)NULL); | |
bd5635a1 | 3321 | else |
d889f6b7 JK |
3322 | sals = decode_line_1 (&string, funfirstline, |
3323 | (struct symtab *)NULL, 0, (char ***)NULL); | |
bd5635a1 RP |
3324 | if (*string) |
3325 | error ("Junk at end of line specification: %s", string); | |
3326 | return sals; | |
3327 | } | |
3328 | \f | |
bd5635a1 RP |
3329 | void |
3330 | _initialize_breakpoint () | |
3331 | { | |
3332 | breakpoint_chain = 0; | |
3333 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful | |
3334 | before a breakpoint is set. */ | |
3335 | breakpoint_count = 0; | |
3336 | ||
3337 | add_com ("ignore", class_breakpoint, ignore_command, | |
3338 | "Set ignore-count of breakpoint number N to COUNT."); | |
3339 | ||
3340 | add_com ("commands", class_breakpoint, commands_command, | |
3341 | "Set commands to be executed when a breakpoint is hit.\n\ | |
3342 | Give breakpoint number as argument after \"commands\".\n\ | |
3343 | With no argument, the targeted breakpoint is the last one set.\n\ | |
3344 | The commands themselves follow starting on the next line.\n\ | |
3345 | Type a line containing \"end\" to indicate the end of them.\n\ | |
3346 | Give \"silent\" as the first line to make the breakpoint silent;\n\ | |
3347 | then no output is printed when it is hit, except what the commands print."); | |
3348 | ||
3349 | add_com ("condition", class_breakpoint, condition_command, | |
3350 | "Specify breakpoint number N to break only if COND is true.\n\ | |
d3b9c0df JG |
3351 | N is an integer; COND is an expression to be evaluated whenever\n\ |
3352 | breakpoint N is reached. "); | |
bd5635a1 RP |
3353 | |
3354 | add_com ("tbreak", class_breakpoint, tbreak_command, | |
3355 | "Set a temporary breakpoint. Args like \"break\" command.\n\ | |
c4de6b30 JK |
3356 | Like \"break\" except the breakpoint is only temporary,\n\ |
3357 | so it will be deleted when hit. Equivalent to \"break\" followed\n\ | |
3358 | by using \"enable delete\" on the breakpoint number."); | |
bd5635a1 RP |
3359 | |
3360 | add_prefix_cmd ("enable", class_breakpoint, enable_command, | |
3361 | "Enable some breakpoints.\n\ | |
3362 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
3363 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
3364 | This is used to cancel the effect of the \"disable\" command.\n\ | |
3365 | With a subcommand you can enable temporarily.", | |
3366 | &enablelist, "enable ", 1, &cmdlist); | |
3367 | ||
3368 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, | |
3369 | "Enable some breakpoints.\n\ | |
3370 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
3371 | This is used to cancel the effect of the \"disable\" command.\n\ | |
3372 | May be abbreviated to simply \"enable\".\n", | |
3373 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); | |
3374 | ||
3375 | add_cmd ("once", no_class, enable_once_command, | |
3376 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
bd2f0c85 | 3377 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.", |
bd5635a1 RP |
3378 | &enablebreaklist); |
3379 | ||
3380 | add_cmd ("delete", no_class, enable_delete_command, | |
3381 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
3382 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
3383 | &enablebreaklist); | |
3384 | ||
3385 | add_cmd ("delete", no_class, enable_delete_command, | |
3386 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
3387 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
3388 | &enablelist); | |
3389 | ||
3390 | add_cmd ("once", no_class, enable_once_command, | |
3391 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
bd2f0c85 | 3392 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.", |
bd5635a1 RP |
3393 | &enablelist); |
3394 | ||
3395 | add_prefix_cmd ("disable", class_breakpoint, disable_command, | |
3396 | "Disable some breakpoints.\n\ | |
3397 | Arguments are breakpoint numbers with spaces in between.\n\ | |
3398 | To disable all breakpoints, give no argument.\n\ | |
3399 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", | |
3400 | &disablelist, "disable ", 1, &cmdlist); | |
3401 | add_com_alias ("dis", "disable", class_breakpoint, 1); | |
3402 | add_com_alias ("disa", "disable", class_breakpoint, 1); | |
3403 | ||
3404 | add_cmd ("breakpoints", class_alias, disable_command, | |
3405 | "Disable some breakpoints.\n\ | |
3406 | Arguments are breakpoint numbers with spaces in between.\n\ | |
3407 | To disable all breakpoints, give no argument.\n\ | |
3408 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |
3409 | This command may be abbreviated \"disable\".", | |
3410 | &disablelist); | |
3411 | ||
3412 | add_prefix_cmd ("delete", class_breakpoint, delete_command, | |
3413 | "Delete some breakpoints or auto-display expressions.\n\ | |
3414 | Arguments are breakpoint numbers with spaces in between.\n\ | |
3415 | To delete all breakpoints, give no argument.\n\ | |
3416 | \n\ | |
3417 | Also a prefix command for deletion of other GDB objects.\n\ | |
3418 | The \"unset\" command is also an alias for \"delete\".", | |
3419 | &deletelist, "delete ", 1, &cmdlist); | |
3420 | add_com_alias ("d", "delete", class_breakpoint, 1); | |
bd5635a1 RP |
3421 | |
3422 | add_cmd ("breakpoints", class_alias, delete_command, | |
3423 | "Delete some breakpoints or auto-display expressions.\n\ | |
3424 | Arguments are breakpoint numbers with spaces in between.\n\ | |
3425 | To delete all breakpoints, give no argument.\n\ | |
3426 | This command may be abbreviated \"delete\".", | |
3427 | &deletelist); | |
3428 | ||
3429 | add_com ("clear", class_breakpoint, clear_command, | |
3430 | "Clear breakpoint at specified line or function.\n\ | |
3431 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
3432 | If line number is specified, all breakpoints in that line are cleared.\n\ | |
3433 | If function is specified, breakpoints at beginning of function are cleared.\n\ | |
3434 | If an address is specified, breakpoints at that address are cleared.\n\n\ | |
3435 | With no argument, clears all breakpoints in the line that the selected frame\n\ | |
3436 | is executing in.\n\ | |
3437 | \n\ | |
3438 | See also the \"delete\" command which clears breakpoints by number."); | |
3439 | ||
3440 | add_com ("break", class_breakpoint, break_command, | |
3441 | "Set breakpoint at specified line or function.\n\ | |
3442 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
3443 | If line number is specified, break at start of code for that line.\n\ | |
3444 | If function is specified, break at start of code for that function.\n\ | |
3445 | If an address is specified, break at that exact address.\n\ | |
3446 | With no arg, uses current execution address of selected stack frame.\n\ | |
3447 | This is useful for breaking on return to a stack frame.\n\ | |
3448 | \n\ | |
3449 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
3450 | \n\ | |
3451 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
3452 | add_com_alias ("b", "break", class_run, 1); | |
3453 | add_com_alias ("br", "break", class_run, 1); | |
3454 | add_com_alias ("bre", "break", class_run, 1); | |
3455 | add_com_alias ("brea", "break", class_run, 1); | |
3456 | ||
3457 | add_info ("breakpoints", breakpoints_info, | |
80ba48f5 SG |
3458 | "Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
3459 | The \"Type\" column indicates one of:\n\ | |
423e9664 SG |
3460 | \tbreakpoint - normal breakpoint\n\ |
3461 | \twatchpoint - watchpoint\n\ | |
80ba48f5 SG |
3462 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
3463 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
3464 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
3465 | address and file/line number respectively.\n\n\ | |
3466 | Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
3467 | are set to the address of the last breakpoint listed.\n\n\ | |
3468 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
3469 | breakpoint set."); | |
3470 | ||
9b280a7f JG |
3471 | #if MAINTENANCE_CMDS |
3472 | ||
3473 | add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, | |
bd5635a1 | 3474 | "Status of all breakpoints, or breakpoint number NUMBER.\n\ |
80ba48f5 | 3475 | The \"Type\" column indicates one of:\n\ |
423e9664 SG |
3476 | \tbreakpoint - normal breakpoint\n\ |
3477 | \twatchpoint - watchpoint\n\ | |
3478 | \tlongjmp - internal breakpoint used to step through longjmp()\n\ | |
3479 | \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ | |
3480 | \tuntil - internal breakpoint used by the \"until\" command\n\ | |
3481 | \tfinish - internal breakpoint used by the \"finish\" command\n\ | |
80ba48f5 SG |
3482 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
3483 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
3484 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
3485 | address and file/line number respectively.\n\n\ | |
bd5635a1 RP |
3486 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
3487 | are set to the address of the last breakpoint listed.\n\n\ | |
3488 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
9b280a7f JG |
3489 | breakpoint set.", |
3490 | &maintenanceinfolist); | |
3491 | ||
3492 | #endif /* MAINTENANCE_CMDS */ | |
bd5635a1 RP |
3493 | |
3494 | add_com ("catch", class_breakpoint, catch_command, | |
3495 | "Set breakpoints to catch exceptions that are raised.\n\ | |
3496 | Argument may be a single exception to catch, multiple exceptions\n\ | |
3497 | to catch, or the default exception \"default\". If no arguments\n\ | |
3498 | are given, breakpoints are set at all exception handlers catch clauses\n\ | |
3499 | within the current scope.\n\ | |
3500 | \n\ | |
3501 | A condition specified for the catch applies to all breakpoints set\n\ | |
3502 | with this command\n\ | |
3503 | \n\ | |
3504 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
3505 | ||
3506 | add_com ("watch", class_breakpoint, watch_command, | |
3507 | "Set a watchpoint for an expression.\n\ | |
3508 | A watchpoint stops execution of your program whenever the value of\n\ | |
3509 | an expression changes."); | |
3510 | ||
c8950965 JG |
3511 | add_info ("watchpoints", breakpoints_info, |
3512 | "Synonym for ``info breakpoints''."); | |
bd5635a1 | 3513 | } |
1eeba686 | 3514 | |
2d313932 JK |
3515 | /* OK, when we call objfile_relocate, we need to relocate breakpoints |
3516 | too. breakpoint_re_set is not a good choice--for example, if | |
3517 | addr_string contains just a line number without a file name the | |
3518 | breakpoint might get set in a different file. In general, there is | |
3519 | no need to go all the way back to the user's string (though this might | |
3520 | work if some effort were made to canonicalize it), since symtabs and | |
3521 | everything except addresses are still valid. | |
1eeba686 | 3522 | |
2d313932 JK |
3523 | Probably the best way to solve this is to have each breakpoint save |
3524 | the objfile and the section number that was used to set it (if set | |
3525 | by "*addr", probably it is best to use find_pc_line to get a symtab | |
3526 | and use the objfile and block_line_section for that symtab). Then | |
3527 | objfile_relocate can call fixup_breakpoints with the objfile and | |
3528 | the new_offsets, and it can relocate only the appropriate breakpoints. */ | |
1eeba686 | 3529 | |
2d313932 JK |
3530 | #ifdef IBM6000_TARGET |
3531 | /* But for now, just kludge it based on the concept that before an | |
3532 | objfile is relocated the breakpoint is below 0x10000000, and afterwards | |
3533 | it is higher, so that way we only relocate each breakpoint once. */ | |
1eeba686 | 3534 | |
1eeba686 PB |
3535 | void |
3536 | fixup_breakpoints (low, high, delta) | |
3537 | CORE_ADDR low; | |
3538 | CORE_ADDR high; | |
3539 | CORE_ADDR delta; | |
3540 | { | |
3541 | struct breakpoint *b; | |
1eeba686 PB |
3542 | |
3543 | ALL_BREAKPOINTS (b) | |
3544 | { | |
3545 | if (b->address >= low && b->address <= high) | |
3546 | b->address += delta; | |
3547 | } | |
3548 | } | |
3549 | #endif |