Commit | Line | Data |
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bd5635a1 | 1 | /* Everything about breakpoints, for GDB. |
2f4973f8 | 2 | Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996 |
9f577285 | 3 | Free Software Foundation, Inc. |
bd5635a1 RP |
4 | |
5 | This file is part of GDB. | |
6 | ||
bdbd5f50 | 7 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 8 | it under the terms of the GNU General Public License as published by |
bdbd5f50 JG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
bd5635a1 | 11 | |
bdbd5f50 | 12 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
bdbd5f50 | 18 | along with this program; if not, write to the Free Software |
cd10c7e3 | 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
bd5635a1 | 20 | |
bd5635a1 | 21 | #include "defs.h" |
1eeba686 | 22 | #include <ctype.h> |
bd5635a1 RP |
23 | #include "symtab.h" |
24 | #include "frame.h" | |
25 | #include "breakpoint.h" | |
30875e1c | 26 | #include "gdbtypes.h" |
bd5635a1 RP |
27 | #include "expression.h" |
28 | #include "gdbcore.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "value.h" | |
bd5635a1 RP |
31 | #include "command.h" |
32 | #include "inferior.h" | |
199b2450 | 33 | #include "thread.h" |
bd5635a1 | 34 | #include "target.h" |
d3b9c0df | 35 | #include "language.h" |
2b576293 | 36 | #include "gdb_string.h" |
423e9664 | 37 | #include "demangle.h" |
9f577285 | 38 | #include "annotate.h" |
bd5635a1 | 39 | |
30875e1c SG |
40 | /* local function prototypes */ |
41 | ||
42 | static void | |
43 | catch_command_1 PARAMS ((char *, int, int)); | |
44 | ||
45 | static void | |
46 | enable_delete_command PARAMS ((char *, int)); | |
47 | ||
48 | static void | |
49 | enable_delete_breakpoint PARAMS ((struct breakpoint *)); | |
50 | ||
51 | static void | |
52 | enable_once_command PARAMS ((char *, int)); | |
53 | ||
54 | static void | |
55 | enable_once_breakpoint PARAMS ((struct breakpoint *)); | |
56 | ||
57 | static void | |
58 | disable_command PARAMS ((char *, int)); | |
59 | ||
30875e1c SG |
60 | static void |
61 | enable_command PARAMS ((char *, int)); | |
62 | ||
30875e1c SG |
63 | static void |
64 | map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *))); | |
65 | ||
66 | static void | |
67 | ignore_command PARAMS ((char *, int)); | |
68 | ||
69 | static int | |
70 | breakpoint_re_set_one PARAMS ((char *)); | |
71 | ||
72 | static void | |
73 | delete_command PARAMS ((char *, int)); | |
74 | ||
75 | static void | |
76 | clear_command PARAMS ((char *, int)); | |
77 | ||
78 | static void | |
79 | catch_command PARAMS ((char *, int)); | |
80 | ||
81 | static struct symtabs_and_lines | |
82 | get_catch_sals PARAMS ((int)); | |
83 | ||
84 | static void | |
85 | watch_command PARAMS ((char *, int)); | |
86 | ||
999dd04b | 87 | static int |
11054881 | 88 | can_use_hardware_watchpoint PARAMS ((struct value *)); |
999dd04b | 89 | |
30875e1c SG |
90 | static void |
91 | tbreak_command PARAMS ((char *, int)); | |
92 | ||
93 | static void | |
94 | break_command_1 PARAMS ((char *, int, int)); | |
95 | ||
96 | static void | |
97 | mention PARAMS ((struct breakpoint *)); | |
98 | ||
99 | static struct breakpoint * | |
100 | set_raw_breakpoint PARAMS ((struct symtab_and_line)); | |
101 | ||
102 | static void | |
103 | check_duplicates PARAMS ((CORE_ADDR)); | |
104 | ||
105 | static void | |
106 | describe_other_breakpoints PARAMS ((CORE_ADDR)); | |
107 | ||
30875e1c SG |
108 | static void |
109 | breakpoints_info PARAMS ((char *, int)); | |
110 | ||
111 | static void | |
423e9664 | 112 | breakpoint_1 PARAMS ((int, int)); |
30875e1c SG |
113 | |
114 | static bpstat | |
115 | bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); | |
116 | ||
117 | static int | |
118 | breakpoint_cond_eval PARAMS ((char *)); | |
119 | ||
120 | static void | |
121 | cleanup_executing_breakpoints PARAMS ((int)); | |
122 | ||
123 | static void | |
124 | commands_command PARAMS ((char *, int)); | |
125 | ||
126 | static void | |
127 | condition_command PARAMS ((char *, int)); | |
128 | ||
129 | static int | |
130 | get_number PARAMS ((char **)); | |
131 | ||
132 | static void | |
133 | set_breakpoint_count PARAMS ((int)); | |
134 | ||
999dd04b JL |
135 | static int |
136 | remove_breakpoint PARAMS ((struct breakpoint *)); | |
30875e1c | 137 | |
bd5635a1 | 138 | extern int addressprint; /* Print machine addresses? */ |
bd5635a1 | 139 | |
bd5635a1 RP |
140 | /* Are we executing breakpoint commands? */ |
141 | static int executing_breakpoint_commands; | |
142 | ||
cba0d141 JG |
143 | /* Walk the following statement or block through all breakpoints. |
144 | ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current | |
145 | breakpoint. */ | |
146 | ||
bd5635a1 RP |
147 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) |
148 | ||
cba0d141 JG |
149 | #define ALL_BREAKPOINTS_SAFE(b,tmp) \ |
150 | for (b = breakpoint_chain; \ | |
151 | b? (tmp=b->next, 1): 0; \ | |
152 | b = tmp) | |
153 | ||
9f577285 SS |
154 | /* True if breakpoint hit counts should be displayed in breakpoint info. */ |
155 | ||
156 | int show_breakpoint_hit_counts = 1; | |
157 | ||
bd5635a1 RP |
158 | /* Chain of all breakpoints defined. */ |
159 | ||
e8bf33c4 | 160 | struct breakpoint *breakpoint_chain; |
bd5635a1 RP |
161 | |
162 | /* Number of last breakpoint made. */ | |
163 | ||
164 | static int breakpoint_count; | |
165 | ||
166 | /* Set breakpoint count to NUM. */ | |
9f577285 | 167 | |
bd5635a1 RP |
168 | static void |
169 | set_breakpoint_count (num) | |
170 | int num; | |
171 | { | |
172 | breakpoint_count = num; | |
173 | set_internalvar (lookup_internalvar ("bpnum"), | |
06b6c733 | 174 | value_from_longest (builtin_type_int, (LONGEST) num)); |
bd5635a1 RP |
175 | } |
176 | ||
9f577285 SS |
177 | /* Used in run_command to zero the hit count when a new run starts. */ |
178 | ||
179 | void | |
180 | clear_breakpoint_hit_counts () | |
181 | { | |
182 | struct breakpoint *b; | |
183 | ||
184 | ALL_BREAKPOINTS (b) | |
185 | b->hit_count = 0; | |
186 | } | |
187 | ||
bd5635a1 RP |
188 | /* Default address, symtab and line to put a breakpoint at |
189 | for "break" command with no arg. | |
190 | if default_breakpoint_valid is zero, the other three are | |
191 | not valid, and "break" with no arg is an error. | |
192 | ||
193 | This set by print_stack_frame, which calls set_default_breakpoint. */ | |
194 | ||
195 | int default_breakpoint_valid; | |
196 | CORE_ADDR default_breakpoint_address; | |
197 | struct symtab *default_breakpoint_symtab; | |
198 | int default_breakpoint_line; | |
bd5635a1 RP |
199 | \f |
200 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. | |
201 | Advance *PP after the string and any trailing whitespace. | |
202 | ||
203 | Currently the string can either be a number or "$" followed by the name | |
204 | of a convenience variable. Making it an expression wouldn't work well | |
205 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ | |
206 | static int | |
207 | get_number (pp) | |
208 | char **pp; | |
209 | { | |
210 | int retval; | |
211 | char *p = *pp; | |
212 | ||
213 | if (p == NULL) | |
214 | /* Empty line means refer to the last breakpoint. */ | |
215 | return breakpoint_count; | |
216 | else if (*p == '$') | |
217 | { | |
218 | /* Make a copy of the name, so we can null-terminate it | |
219 | to pass to lookup_internalvar(). */ | |
220 | char *varname; | |
221 | char *start = ++p; | |
82a2edfb | 222 | value_ptr val; |
bd5635a1 RP |
223 | |
224 | while (isalnum (*p) || *p == '_') | |
225 | p++; | |
226 | varname = (char *) alloca (p - start + 1); | |
227 | strncpy (varname, start, p - start); | |
228 | varname[p - start] = '\0'; | |
229 | val = value_of_internalvar (lookup_internalvar (varname)); | |
230 | if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT) | |
231 | error ( | |
232 | "Convenience variables used to specify breakpoints must have integer values." | |
233 | ); | |
234 | retval = (int) value_as_long (val); | |
235 | } | |
236 | else | |
237 | { | |
80ba48f5 SG |
238 | if (*p == '-') |
239 | ++p; | |
bd5635a1 RP |
240 | while (*p >= '0' && *p <= '9') |
241 | ++p; | |
242 | if (p == *pp) | |
243 | /* There is no number here. (e.g. "cond a == b"). */ | |
244 | error_no_arg ("breakpoint number"); | |
245 | retval = atoi (*pp); | |
246 | } | |
247 | if (!(isspace (*p) || *p == '\0')) | |
248 | error ("breakpoint number expected"); | |
249 | while (isspace (*p)) | |
250 | p++; | |
251 | *pp = p; | |
252 | return retval; | |
253 | } | |
254 | \f | |
255 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ | |
256 | ||
257 | static void | |
258 | condition_command (arg, from_tty) | |
259 | char *arg; | |
260 | int from_tty; | |
261 | { | |
262 | register struct breakpoint *b; | |
263 | char *p; | |
264 | register int bnum; | |
265 | ||
266 | if (arg == 0) | |
267 | error_no_arg ("breakpoint number"); | |
268 | ||
269 | p = arg; | |
270 | bnum = get_number (&p); | |
271 | ||
272 | ALL_BREAKPOINTS (b) | |
273 | if (b->number == bnum) | |
274 | { | |
275 | if (b->cond) | |
276 | { | |
c8950965 | 277 | free ((PTR)b->cond); |
bd5635a1 RP |
278 | b->cond = 0; |
279 | } | |
280 | if (b->cond_string != NULL) | |
c8950965 | 281 | free ((PTR)b->cond_string); |
bd5635a1 RP |
282 | |
283 | if (*p == 0) | |
284 | { | |
285 | b->cond = 0; | |
286 | b->cond_string = NULL; | |
287 | if (from_tty) | |
423e9664 | 288 | printf_filtered ("Breakpoint %d now unconditional.\n", bnum); |
bd5635a1 RP |
289 | } |
290 | else | |
291 | { | |
292 | arg = p; | |
293 | /* I don't know if it matters whether this is the string the user | |
294 | typed in or the decompiled expression. */ | |
295 | b->cond_string = savestring (arg, strlen (arg)); | |
d3b9c0df | 296 | b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); |
bd5635a1 RP |
297 | if (*arg) |
298 | error ("Junk at end of expression"); | |
299 | } | |
16726dd1 | 300 | breakpoints_changed (); |
bd5635a1 RP |
301 | return; |
302 | } | |
303 | ||
304 | error ("No breakpoint number %d.", bnum); | |
305 | } | |
306 | ||
bdbd5f50 | 307 | /* ARGSUSED */ |
bd5635a1 RP |
308 | static void |
309 | commands_command (arg, from_tty) | |
310 | char *arg; | |
311 | int from_tty; | |
312 | { | |
313 | register struct breakpoint *b; | |
314 | char *p; | |
315 | register int bnum; | |
316 | struct command_line *l; | |
317 | ||
318 | /* If we allowed this, we would have problems with when to | |
319 | free the storage, if we change the commands currently | |
320 | being read from. */ | |
321 | ||
322 | if (executing_breakpoint_commands) | |
323 | error ("Can't use the \"commands\" command among a breakpoint's commands."); | |
324 | ||
325 | p = arg; | |
326 | bnum = get_number (&p); | |
327 | if (p && *p) | |
328 | error ("Unexpected extra arguments following breakpoint number."); | |
329 | ||
330 | ALL_BREAKPOINTS (b) | |
331 | if (b->number == bnum) | |
332 | { | |
bdbd5f50 | 333 | if (from_tty && input_from_terminal_p ()) |
9b280a7f | 334 | printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\ |
bd5635a1 | 335 | End with a line saying just \"end\".\n", bnum); |
bd5635a1 RP |
336 | l = read_command_lines (); |
337 | free_command_lines (&b->commands); | |
338 | b->commands = l; | |
6c803036 | 339 | breakpoints_changed (); |
bd5635a1 RP |
340 | return; |
341 | } | |
342 | error ("No breakpoint number %d.", bnum); | |
343 | } | |
344 | \f | |
31ef19fc JK |
345 | extern int memory_breakpoint_size; /* from mem-break.c */ |
346 | ||
347 | /* Like target_read_memory() but if breakpoints are inserted, return | |
30875e1c SG |
348 | the shadow contents instead of the breakpoints themselves. |
349 | ||
350 | Read "memory data" from whatever target or inferior we have. | |
351 | Returns zero if successful, errno value if not. EIO is used | |
352 | for address out of bounds. If breakpoints are inserted, returns | |
353 | shadow contents, not the breakpoints themselves. From breakpoint.c. */ | |
354 | ||
31ef19fc JK |
355 | int |
356 | read_memory_nobpt (memaddr, myaddr, len) | |
357 | CORE_ADDR memaddr; | |
358 | char *myaddr; | |
359 | unsigned len; | |
360 | { | |
361 | int status; | |
362 | struct breakpoint *b; | |
363 | ||
364 | if (memory_breakpoint_size < 0) | |
5af4f5f6 JK |
365 | /* No breakpoints on this machine. FIXME: This should be |
366 | dependent on the debugging target. Probably want | |
367 | target_insert_breakpoint to return a size, saying how many | |
368 | bytes of the shadow contents are used, or perhaps have | |
369 | something like target_xfer_shadow. */ | |
31ef19fc JK |
370 | return target_read_memory (memaddr, myaddr, len); |
371 | ||
372 | ALL_BREAKPOINTS (b) | |
373 | { | |
999dd04b JL |
374 | if (b->type == bp_watchpoint |
375 | || b->type == bp_hardware_watchpoint | |
11054881 KH |
376 | || b->type == bp_read_watchpoint |
377 | || b->type == bp_access_watchpoint | |
999dd04b | 378 | || !b->inserted) |
31ef19fc JK |
379 | continue; |
380 | else if (b->address + memory_breakpoint_size <= memaddr) | |
381 | /* The breakpoint is entirely before the chunk of memory | |
382 | we are reading. */ | |
383 | continue; | |
384 | else if (b->address >= memaddr + len) | |
385 | /* The breakpoint is entirely after the chunk of memory we | |
386 | are reading. */ | |
387 | continue; | |
388 | else | |
389 | { | |
390 | /* Copy the breakpoint from the shadow contents, and recurse | |
391 | for the things before and after. */ | |
392 | ||
393 | /* Addresses and length of the part of the breakpoint that | |
394 | we need to copy. */ | |
395 | CORE_ADDR membpt = b->address; | |
396 | unsigned int bptlen = memory_breakpoint_size; | |
397 | /* Offset within shadow_contents. */ | |
398 | int bptoffset = 0; | |
399 | ||
400 | if (membpt < memaddr) | |
401 | { | |
402 | /* Only copy the second part of the breakpoint. */ | |
403 | bptlen -= memaddr - membpt; | |
404 | bptoffset = memaddr - membpt; | |
405 | membpt = memaddr; | |
406 | } | |
407 | ||
408 | if (membpt + bptlen > memaddr + len) | |
409 | { | |
410 | /* Only copy the first part of the breakpoint. */ | |
411 | bptlen -= (membpt + bptlen) - (memaddr + len); | |
412 | } | |
413 | ||
4ed3a9ea FF |
414 | memcpy (myaddr + membpt - memaddr, |
415 | b->shadow_contents + bptoffset, bptlen); | |
31ef19fc JK |
416 | |
417 | if (membpt > memaddr) | |
418 | { | |
419 | /* Copy the section of memory before the breakpoint. */ | |
420 | status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr); | |
421 | if (status != 0) | |
422 | return status; | |
423 | } | |
424 | ||
425 | if (membpt + bptlen < memaddr + len) | |
426 | { | |
427 | /* Copy the section of memory after the breakpoint. */ | |
428 | status = read_memory_nobpt | |
429 | (membpt + bptlen, | |
430 | myaddr + membpt + bptlen - memaddr, | |
431 | memaddr + len - (membpt + bptlen)); | |
432 | if (status != 0) | |
433 | return status; | |
434 | } | |
435 | return 0; | |
436 | } | |
437 | } | |
438 | /* Nothing overlaps. Just call read_memory_noerr. */ | |
439 | return target_read_memory (memaddr, myaddr, len); | |
440 | } | |
441 | \f | |
bd5635a1 RP |
442 | /* insert_breakpoints is used when starting or continuing the program. |
443 | remove_breakpoints is used when the program stops. | |
444 | Both return zero if successful, | |
445 | or an `errno' value if could not write the inferior. */ | |
446 | ||
447 | int | |
448 | insert_breakpoints () | |
449 | { | |
fa3764e2 | 450 | register struct breakpoint *b, *temp; |
bd5635a1 RP |
451 | int val = 0; |
452 | int disabled_breaks = 0; | |
453 | ||
fa3764e2 | 454 | ALL_BREAKPOINTS_SAFE (b, temp) |
30875e1c | 455 | if (b->type != bp_watchpoint |
999dd04b | 456 | && b->type != bp_hardware_watchpoint |
11054881 KH |
457 | && b->type != bp_read_watchpoint |
458 | && b->type != bp_access_watchpoint | |
bd5635a1 | 459 | && b->enable != disabled |
fa3764e2 | 460 | && b->enable != shlib_disabled |
bd5635a1 RP |
461 | && ! b->inserted |
462 | && ! b->duplicate) | |
463 | { | |
11054881 KH |
464 | if (b->type == bp_hardware_breakpoint) |
465 | val = target_insert_hw_breakpoint(b->address, b->shadow_contents); | |
466 | else | |
467 | val = target_insert_breakpoint(b->address, b->shadow_contents); | |
bd5635a1 RP |
468 | if (val) |
469 | { | |
470 | /* Can't set the breakpoint. */ | |
471 | #if defined (DISABLE_UNSETTABLE_BREAK) | |
472 | if (DISABLE_UNSETTABLE_BREAK (b->address)) | |
473 | { | |
474 | val = 0; | |
fa3764e2 | 475 | b->enable = shlib_disabled; |
bd5635a1 RP |
476 | if (!disabled_breaks) |
477 | { | |
05052b63 | 478 | target_terminal_ours_for_output (); |
199b2450 | 479 | fprintf_unfiltered (gdb_stderr, |
2d313932 | 480 | "Cannot insert breakpoint %d:\n", b->number); |
fa3764e2 | 481 | printf_filtered ("Temporarily disabling shared library breakpoints:\n"); |
bd5635a1 RP |
482 | } |
483 | disabled_breaks = 1; | |
484 | printf_filtered ("%d ", b->number); | |
485 | } | |
486 | else | |
487 | #endif | |
488 | { | |
05052b63 | 489 | target_terminal_ours_for_output (); |
199b2450 | 490 | fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); |
d3b9c0df | 491 | #ifdef ONE_PROCESS_WRITETEXT |
199b2450 | 492 | fprintf_unfiltered (gdb_stderr, |
2d313932 | 493 | "The same program may be running in another process.\n"); |
d3b9c0df | 494 | #endif |
bd5635a1 RP |
495 | memory_error (val, b->address); /* which bombs us out */ |
496 | } | |
497 | } | |
498 | else | |
499 | b->inserted = 1; | |
500 | } | |
11054881 KH |
501 | else if ((b->type == bp_hardware_watchpoint || |
502 | b->type == bp_read_watchpoint || | |
503 | b->type == bp_access_watchpoint) | |
999dd04b JL |
504 | && b->enable == enabled |
505 | && ! b->inserted | |
506 | && ! b->duplicate) | |
507 | { | |
706dc3ce | 508 | struct frame_info *saved_frame; |
999dd04b JL |
509 | int saved_level, within_current_scope; |
510 | value_ptr mark = value_mark (); | |
511 | value_ptr v; | |
512 | ||
513 | /* Save the current frame and level so we can restore it after | |
514 | evaluating the watchpoint expression on its own frame. */ | |
515 | saved_frame = selected_frame; | |
516 | saved_level = selected_frame_level; | |
517 | ||
518 | /* Determine if the watchpoint is within scope. */ | |
519 | if (b->exp_valid_block == NULL) | |
520 | within_current_scope = 1; | |
521 | else | |
522 | { | |
706dc3ce JL |
523 | struct frame_info *fi = |
524 | find_frame_addr_in_frame_chain (b->watchpoint_frame); | |
525 | within_current_scope = (fi != NULL); | |
999dd04b | 526 | if (within_current_scope) |
706dc3ce | 527 | select_frame (fi, -1); |
999dd04b JL |
528 | } |
529 | ||
530 | if (within_current_scope) | |
531 | { | |
532 | /* Evaluate the expression and cut the chain of values | |
533 | produced off from the value chain. */ | |
534 | v = evaluate_expression (b->exp); | |
535 | value_release_to_mark (mark); | |
536 | ||
537 | b->val_chain = v; | |
538 | b->inserted = 1; | |
539 | ||
540 | /* Look at each value on the value chain. */ | |
541 | for ( ; v; v=v->next) | |
542 | { | |
543 | /* If it's a memory location, then we must watch it. */ | |
544 | if (v->lval == lval_memory) | |
545 | { | |
11054881 | 546 | int addr, len, type; |
999dd04b JL |
547 | |
548 | addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); | |
549 | len = TYPE_LENGTH (VALUE_TYPE (v)); | |
11054881 KH |
550 | type = 0; |
551 | if (b->type == bp_read_watchpoint) | |
552 | type = 1; | |
553 | else if (b->type == bp_access_watchpoint) | |
554 | type = 2; | |
555 | ||
556 | val = target_insert_watchpoint (addr, len, type); | |
999dd04b JL |
557 | if (val == -1) |
558 | { | |
559 | b->inserted = 0; | |
560 | break; | |
561 | } | |
562 | val = 0; | |
563 | } | |
564 | } | |
565 | /* Failure to insert a watchpoint on any memory value in the | |
566 | value chain brings us here. */ | |
567 | if (!b->inserted) | |
568 | warning ("Hardware watchpoint %d: Could not insert watchpoint\n", | |
569 | b->number); | |
570 | } | |
571 | else | |
572 | { | |
573 | printf_filtered ("\ | |
574 | Hardware watchpoint %d deleted because the program has left the block in\n\ | |
575 | which its expression is valid.\n", b->number); | |
576 | if (b->related_breakpoint) | |
577 | delete_breakpoint (b->related_breakpoint); | |
578 | delete_breakpoint (b); | |
579 | } | |
580 | ||
581 | /* Restore the frame and level. */ | |
582 | select_frame (saved_frame, saved_level); | |
583 | } | |
bd5635a1 RP |
584 | if (disabled_breaks) |
585 | printf_filtered ("\n"); | |
586 | return val; | |
587 | } | |
588 | ||
999dd04b | 589 | |
bd5635a1 RP |
590 | int |
591 | remove_breakpoints () | |
592 | { | |
593 | register struct breakpoint *b; | |
594 | int val; | |
595 | ||
bd5635a1 | 596 | ALL_BREAKPOINTS (b) |
999dd04b JL |
597 | { |
598 | if (b->inserted) | |
599 | { | |
600 | val = remove_breakpoint (b); | |
601 | if (val != 0) | |
602 | return val; | |
603 | } | |
604 | } | |
605 | return 0; | |
606 | } | |
bd5635a1 | 607 | |
999dd04b JL |
608 | |
609 | static int | |
610 | remove_breakpoint (b) | |
611 | struct breakpoint *b; | |
612 | { | |
613 | int val; | |
614 | ||
615 | if (b->type != bp_watchpoint | |
11054881 KH |
616 | && b->type != bp_hardware_watchpoint |
617 | && b->type != bp_read_watchpoint | |
618 | && b->type != bp_access_watchpoint) | |
999dd04b | 619 | { |
11054881 KH |
620 | if (b->type == bp_hardware_breakpoint) |
621 | val = target_remove_hw_breakpoint(b->address, b->shadow_contents); | |
622 | else | |
623 | val = target_remove_breakpoint(b->address, b->shadow_contents); | |
999dd04b JL |
624 | if (val) |
625 | return val; | |
626 | b->inserted = 0; | |
627 | } | |
11054881 KH |
628 | else if ((b->type == bp_hardware_watchpoint || |
629 | b->type == bp_read_watchpoint || | |
630 | b->type == bp_access_watchpoint) | |
999dd04b JL |
631 | && b->enable == enabled |
632 | && ! b->duplicate) | |
633 | { | |
634 | value_ptr v, n; | |
635 | ||
636 | b->inserted = 0; | |
637 | /* Walk down the saved value chain. */ | |
638 | for (v = b->val_chain; v; v = v->next) | |
639 | { | |
640 | /* For each memory reference remove the watchpoint | |
641 | at that address. */ | |
642 | if (v->lval == lval_memory) | |
643 | { | |
644 | int addr, len; | |
645 | ||
646 | addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); | |
647 | len = TYPE_LENGTH (VALUE_TYPE (v)); | |
11054881 | 648 | val = target_remove_watchpoint (addr, len, b->type); |
999dd04b JL |
649 | if (val == -1) |
650 | b->inserted = 1; | |
651 | val = 0; | |
652 | } | |
653 | } | |
654 | /* Failure to remove any of the hardware watchpoints comes here. */ | |
655 | if (b->inserted) | |
0fe1522a SG |
656 | warning ("Hardware watchpoint %d: Could not remove watchpoint\n", |
657 | b->number); | |
999dd04b JL |
658 | |
659 | /* Free the saved value chain. We will construct a new one | |
660 | the next time the watchpoint is inserted. */ | |
661 | for (v = b->val_chain; v; v = n) | |
662 | { | |
663 | n = v->next; | |
664 | value_free (v); | |
665 | } | |
666 | b->val_chain = NULL; | |
667 | } | |
bd5635a1 RP |
668 | return 0; |
669 | } | |
670 | ||
cf3e377e | 671 | /* Clear the "inserted" flag in all breakpoints. */ |
bd5635a1 RP |
672 | |
673 | void | |
674 | mark_breakpoints_out () | |
675 | { | |
676 | register struct breakpoint *b; | |
677 | ||
678 | ALL_BREAKPOINTS (b) | |
679 | b->inserted = 0; | |
680 | } | |
681 | ||
cf3e377e JK |
682 | /* Clear the "inserted" flag in all breakpoints and delete any breakpoints |
683 | which should go away between runs of the program. */ | |
684 | ||
685 | void | |
686 | breakpoint_init_inferior () | |
687 | { | |
688 | register struct breakpoint *b, *temp; | |
689 | ||
690 | ALL_BREAKPOINTS_SAFE (b, temp) | |
691 | { | |
692 | b->inserted = 0; | |
693 | ||
694 | /* If the call dummy breakpoint is at the entry point it will | |
695 | cause problems when the inferior is rerun, so we better | |
696 | get rid of it. */ | |
697 | if (b->type == bp_call_dummy) | |
698 | delete_breakpoint (b); | |
999dd04b JL |
699 | |
700 | /* Likewise for scope breakpoints. */ | |
701 | if (b->type == bp_watchpoint_scope) | |
702 | delete_breakpoint (b); | |
703 | ||
704 | /* Likewise for watchpoints on local expressions. */ | |
11054881 KH |
705 | if ((b->type == bp_watchpoint || b->type == bp_hardware_watchpoint || |
706 | b->type == bp_read_watchpoint || b->type == bp_access_watchpoint) | |
999dd04b JL |
707 | && b->exp_valid_block != NULL) |
708 | delete_breakpoint (b); | |
cf3e377e JK |
709 | } |
710 | } | |
711 | ||
bd5635a1 RP |
712 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. |
713 | When continuing from a location with a breakpoint, | |
714 | we actually single step once before calling insert_breakpoints. */ | |
715 | ||
716 | int | |
717 | breakpoint_here_p (pc) | |
718 | CORE_ADDR pc; | |
719 | { | |
720 | register struct breakpoint *b; | |
721 | ||
722 | ALL_BREAKPOINTS (b) | |
fa3764e2 JL |
723 | if (b->enable != disabled |
724 | && b->enable != shlib_disabled | |
725 | && b->address == pc) | |
bd5635a1 RP |
726 | return 1; |
727 | ||
728 | return 0; | |
729 | } | |
199b2450 | 730 | |
05052b63 JK |
731 | /* Return nonzero if FRAME is a dummy frame. We can't use PC_IN_CALL_DUMMY |
732 | because figuring out the saved SP would take too much time, at least using | |
733 | get_saved_register on the 68k. This means that for this function to | |
734 | work right a port must use the bp_call_dummy breakpoint. */ | |
735 | ||
736 | int | |
737 | frame_in_dummy (frame) | |
706dc3ce | 738 | struct frame_info *frame; |
05052b63 JK |
739 | { |
740 | struct breakpoint *b; | |
741 | ||
d7e7e851 | 742 | #ifdef CALL_DUMMY |
05052b63 JK |
743 | ALL_BREAKPOINTS (b) |
744 | { | |
d7e7e851 JK |
745 | static unsigned LONGEST dummy[] = CALL_DUMMY; |
746 | ||
05052b63 | 747 | if (b->type == bp_call_dummy |
d7e7e851 JK |
748 | && b->frame == frame->frame |
749 | ||
750 | /* We need to check the PC as well as the frame on the sparc, | |
751 | for signals.exp in the testsuite. */ | |
752 | && (frame->pc | |
753 | >= (b->address | |
754 | - sizeof (dummy) / sizeof (LONGEST) * REGISTER_SIZE)) | |
755 | && frame->pc <= b->address) | |
05052b63 JK |
756 | return 1; |
757 | } | |
d7e7e851 | 758 | #endif /* CALL_DUMMY */ |
05052b63 JK |
759 | return 0; |
760 | } | |
761 | ||
199b2450 TL |
762 | /* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC |
763 | is valid for process/thread PID. */ | |
764 | ||
765 | int | |
766 | breakpoint_thread_match (pc, pid) | |
767 | CORE_ADDR pc; | |
768 | int pid; | |
769 | { | |
770 | struct breakpoint *b; | |
771 | int thread; | |
772 | ||
773 | thread = pid_to_thread_id (pid); | |
774 | ||
775 | ALL_BREAKPOINTS (b) | |
776 | if (b->enable != disabled | |
fa3764e2 | 777 | && b->enable != shlib_disabled |
199b2450 TL |
778 | && b->address == pc |
779 | && (b->thread == -1 || b->thread == thread)) | |
780 | return 1; | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
bd5635a1 RP |
785 | \f |
786 | /* bpstat stuff. External routines' interfaces are documented | |
787 | in breakpoint.h. */ | |
30875e1c SG |
788 | |
789 | /* Clear a bpstat so that it says we are not at any breakpoint. | |
790 | Also free any storage that is part of a bpstat. */ | |
791 | ||
bd5635a1 RP |
792 | void |
793 | bpstat_clear (bsp) | |
794 | bpstat *bsp; | |
795 | { | |
796 | bpstat p; | |
797 | bpstat q; | |
798 | ||
799 | if (bsp == 0) | |
800 | return; | |
801 | p = *bsp; | |
802 | while (p != NULL) | |
803 | { | |
804 | q = p->next; | |
805 | if (p->old_val != NULL) | |
806 | value_free (p->old_val); | |
c8950965 | 807 | free ((PTR)p); |
bd5635a1 RP |
808 | p = q; |
809 | } | |
810 | *bsp = NULL; | |
811 | } | |
812 | ||
30875e1c SG |
813 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
814 | is part of the bpstat is copied as well. */ | |
815 | ||
bd5635a1 RP |
816 | bpstat |
817 | bpstat_copy (bs) | |
818 | bpstat bs; | |
819 | { | |
820 | bpstat p = NULL; | |
821 | bpstat tmp; | |
fee933f1 | 822 | bpstat retval = NULL; |
bd5635a1 RP |
823 | |
824 | if (bs == NULL) | |
825 | return bs; | |
826 | ||
827 | for (; bs != NULL; bs = bs->next) | |
828 | { | |
829 | tmp = (bpstat) xmalloc (sizeof (*tmp)); | |
4ed3a9ea | 830 | memcpy (tmp, bs, sizeof (*tmp)); |
bd5635a1 RP |
831 | if (p == NULL) |
832 | /* This is the first thing in the chain. */ | |
833 | retval = tmp; | |
834 | else | |
835 | p->next = tmp; | |
836 | p = tmp; | |
837 | } | |
838 | p->next = NULL; | |
839 | return retval; | |
840 | } | |
841 | ||
30875e1c SG |
842 | /* Find the bpstat associated with this breakpoint */ |
843 | ||
844 | bpstat | |
845 | bpstat_find_breakpoint(bsp, breakpoint) | |
846 | bpstat bsp; | |
847 | struct breakpoint *breakpoint; | |
848 | { | |
849 | if (bsp == NULL) return NULL; | |
850 | ||
851 | for (;bsp != NULL; bsp = bsp->next) { | |
852 | if (bsp->breakpoint_at == breakpoint) return bsp; | |
853 | } | |
854 | return NULL; | |
855 | } | |
856 | ||
857 | /* Return the breakpoint number of the first breakpoint we are stopped | |
858 | at. *BSP upon return is a bpstat which points to the remaining | |
859 | breakpoints stopped at (but which is not guaranteed to be good for | |
860 | anything but further calls to bpstat_num). | |
861 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ | |
862 | ||
bd5635a1 RP |
863 | int |
864 | bpstat_num (bsp) | |
865 | bpstat *bsp; | |
866 | { | |
867 | struct breakpoint *b; | |
868 | ||
869 | if ((*bsp) == NULL) | |
870 | return 0; /* No more breakpoint values */ | |
871 | else | |
872 | { | |
873 | b = (*bsp)->breakpoint_at; | |
874 | *bsp = (*bsp)->next; | |
875 | if (b == NULL) | |
876 | return -1; /* breakpoint that's been deleted since */ | |
877 | else | |
878 | return b->number; /* We have its number */ | |
879 | } | |
880 | } | |
881 | ||
30875e1c SG |
882 | /* Modify BS so that the actions will not be performed. */ |
883 | ||
bd5635a1 RP |
884 | void |
885 | bpstat_clear_actions (bs) | |
886 | bpstat bs; | |
887 | { | |
888 | for (; bs != NULL; bs = bs->next) | |
889 | { | |
890 | bs->commands = NULL; | |
891 | if (bs->old_val != NULL) | |
892 | { | |
893 | value_free (bs->old_val); | |
894 | bs->old_val = NULL; | |
895 | } | |
896 | } | |
897 | } | |
898 | ||
bdbd5f50 JG |
899 | /* Stub for cleaning up our state if we error-out of a breakpoint command */ |
900 | /* ARGSUSED */ | |
901 | static void | |
902 | cleanup_executing_breakpoints (ignore) | |
903 | int ignore; | |
904 | { | |
905 | executing_breakpoint_commands = 0; | |
906 | } | |
907 | ||
bd5635a1 RP |
908 | /* Execute all the commands associated with all the breakpoints at this |
909 | location. Any of these commands could cause the process to proceed | |
910 | beyond this point, etc. We look out for such changes by checking | |
911 | the global "breakpoint_proceeded" after each command. */ | |
30875e1c | 912 | |
bd5635a1 RP |
913 | void |
914 | bpstat_do_actions (bsp) | |
915 | bpstat *bsp; | |
916 | { | |
917 | bpstat bs; | |
bdbd5f50 | 918 | struct cleanup *old_chain; |
e8bf33c4 | 919 | struct command_line *cmd; |
bdbd5f50 JG |
920 | |
921 | executing_breakpoint_commands = 1; | |
922 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); | |
bd5635a1 RP |
923 | |
924 | top: | |
925 | bs = *bsp; | |
926 | ||
bd5635a1 RP |
927 | breakpoint_proceeded = 0; |
928 | for (; bs != NULL; bs = bs->next) | |
929 | { | |
e8bf33c4 JK |
930 | cmd = bs->commands; |
931 | while (cmd != NULL) | |
bd5635a1 | 932 | { |
0f8cdd9b | 933 | execute_control_command (cmd); |
e8bf33c4 | 934 | cmd = cmd->next; |
bd5635a1 | 935 | } |
e8bf33c4 JK |
936 | if (breakpoint_proceeded) |
937 | /* The inferior is proceeded by the command; bomb out now. | |
938 | The bpstat chain has been blown away by wait_for_inferior. | |
939 | But since execution has stopped again, there is a new bpstat | |
940 | to look at, so start over. */ | |
941 | goto top; | |
942 | else | |
943 | bs->commands = NULL; | |
bd5635a1 | 944 | } |
bd5635a1 RP |
945 | |
946 | executing_breakpoint_commands = 0; | |
bdbd5f50 | 947 | discard_cleanups (old_chain); |
bd5635a1 RP |
948 | } |
949 | ||
8af68e4e JK |
950 | /* This is the normal print_it function for a bpstat. In the future, |
951 | much of this logic could (should?) be moved to bpstat_stop_status, | |
952 | by having it set different print_it functions. */ | |
30875e1c | 953 | |
8af68e4e JK |
954 | static int |
955 | print_it_normal (bs) | |
bd5635a1 RP |
956 | bpstat bs; |
957 | { | |
958 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint | |
959 | which has since been deleted. */ | |
8af68e4e | 960 | if (bs->breakpoint_at == NULL |
30875e1c | 961 | || (bs->breakpoint_at->type != bp_breakpoint |
11054881 | 962 | && bs->breakpoint_at->type != bp_hardware_breakpoint |
999dd04b | 963 | && bs->breakpoint_at->type != bp_watchpoint |
11054881 KH |
964 | && bs->breakpoint_at->type != bp_read_watchpoint |
965 | && bs->breakpoint_at->type != bp_access_watchpoint | |
999dd04b | 966 | && bs->breakpoint_at->type != bp_hardware_watchpoint)) |
bd5635a1 | 967 | return 0; |
bd5635a1 | 968 | |
11054881 KH |
969 | if (bs->breakpoint_at->type == bp_breakpoint || |
970 | bs->breakpoint_at->type == bp_hardware_breakpoint) | |
bd5635a1 RP |
971 | { |
972 | /* I think the user probably only wants to see one breakpoint | |
973 | number, not all of them. */ | |
f2d9c058 | 974 | annotate_breakpoint (bs->breakpoint_at->number); |
bd5635a1 RP |
975 | printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); |
976 | return 0; | |
977 | } | |
11054881 KH |
978 | else if ((bs->old_val != NULL) && |
979 | (bs->breakpoint_at->type == bp_watchpoint || | |
980 | bs->breakpoint_at->type == bp_access_watchpoint || | |
981 | bs->breakpoint_at->type == bp_hardware_watchpoint)) | |
bd5635a1 | 982 | { |
f2d9c058 | 983 | annotate_watchpoint (bs->breakpoint_at->number); |
11054881 | 984 | mention (bs->breakpoint_at); |
bd5635a1 | 985 | printf_filtered ("\nOld value = "); |
199b2450 | 986 | value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default); |
bd5635a1 | 987 | printf_filtered ("\nNew value = "); |
199b2450 | 988 | value_print (bs->breakpoint_at->val, gdb_stdout, 0, |
bd5635a1 RP |
989 | Val_pretty_default); |
990 | printf_filtered ("\n"); | |
991 | value_free (bs->old_val); | |
992 | bs->old_val = NULL; | |
bd2f0c85 JL |
993 | /* More than one watchpoint may have been triggered. */ |
994 | return -1; | |
bd5635a1 | 995 | } |
11054881 KH |
996 | else if (bs->breakpoint_at->type == bp_access_watchpoint || |
997 | bs->breakpoint_at->type == bp_read_watchpoint) | |
998 | { | |
999 | mention (bs->breakpoint_at); | |
1000 | printf_filtered ("\nValue = "); | |
1001 | value_print (bs->breakpoint_at->val, gdb_stdout, 0, | |
1002 | Val_pretty_default); | |
1003 | printf_filtered ("\n"); | |
1004 | return -1; | |
1005 | } | |
8af68e4e JK |
1006 | /* We can't deal with it. Maybe another member of the bpstat chain can. */ |
1007 | return -1; | |
1008 | } | |
1009 | ||
1010 | /* Print a message indicating what happened. Returns nonzero to | |
1011 | say that only the source line should be printed after this (zero | |
1012 | return means print the frame as well as the source line). */ | |
3f031adf | 1013 | /* Currently we always return zero. */ |
8af68e4e JK |
1014 | int |
1015 | bpstat_print (bs) | |
1016 | bpstat bs; | |
1017 | { | |
1018 | int val; | |
1019 | ||
1020 | if (bs == NULL) | |
1021 | return 0; | |
bd5635a1 | 1022 | |
8af68e4e JK |
1023 | val = (*bs->print_it) (bs); |
1024 | if (val >= 0) | |
1025 | return val; | |
1026 | ||
fcb887ff JK |
1027 | /* Maybe another breakpoint in the chain caused us to stop. |
1028 | (Currently all watchpoints go on the bpstat whether hit or | |
1029 | not. That probably could (should) be changed, provided care is taken | |
1030 | with respect to bpstat_explains_signal). */ | |
1031 | if (bs->next) | |
1032 | return bpstat_print (bs->next); | |
1033 | ||
cabd4da6 | 1034 | /* We reached the end of the chain without printing anything. */ |
bd5635a1 RP |
1035 | return 0; |
1036 | } | |
1037 | ||
1038 | /* Evaluate the expression EXP and return 1 if value is zero. | |
1039 | This is used inside a catch_errors to evaluate the breakpoint condition. | |
bdbd5f50 | 1040 | The argument is a "struct expression *" that has been cast to char * to |
bd5635a1 RP |
1041 | make it pass through catch_errors. */ |
1042 | ||
1043 | static int | |
1044 | breakpoint_cond_eval (exp) | |
bdbd5f50 | 1045 | char *exp; |
bd5635a1 | 1046 | { |
11054881 KH |
1047 | value_ptr mark = value_mark (); |
1048 | int i = !value_true (evaluate_expression ((struct expression *)exp)); | |
1049 | value_free_to_mark (mark); | |
1050 | return i; | |
bd5635a1 RP |
1051 | } |
1052 | ||
1053 | /* Allocate a new bpstat and chain it to the current one. */ | |
1054 | ||
1055 | static bpstat | |
1056 | bpstat_alloc (b, cbs) | |
1057 | register struct breakpoint *b; | |
1058 | bpstat cbs; /* Current "bs" value */ | |
1059 | { | |
1060 | bpstat bs; | |
1061 | ||
1062 | bs = (bpstat) xmalloc (sizeof (*bs)); | |
1063 | cbs->next = bs; | |
1064 | bs->breakpoint_at = b; | |
1065 | /* If the condition is false, etc., don't do the commands. */ | |
1066 | bs->commands = NULL; | |
bd5635a1 | 1067 | bs->old_val = NULL; |
8af68e4e | 1068 | bs->print_it = print_it_normal; |
bd5635a1 RP |
1069 | return bs; |
1070 | } | |
fa99ebe1 | 1071 | \f |
8af68e4e JK |
1072 | /* Possible return values for watchpoint_check (this can't be an enum |
1073 | because of check_errors). */ | |
999dd04b JL |
1074 | /* The watchpoint has been deleted. */ |
1075 | #define WP_DELETED 1 | |
8af68e4e JK |
1076 | /* The value has changed. */ |
1077 | #define WP_VALUE_CHANGED 2 | |
1078 | /* The value has not changed. */ | |
1079 | #define WP_VALUE_NOT_CHANGED 3 | |
1080 | ||
e8bf33c4 JK |
1081 | #define BP_TEMPFLAG 1 |
1082 | #define BP_HARDWAREFLAG 2 | |
1083 | ||
8af68e4e | 1084 | /* Check watchpoint condition. */ |
557f3a0e | 1085 | |
8af68e4e JK |
1086 | static int |
1087 | watchpoint_check (p) | |
fe675038 | 1088 | char *p; |
8af68e4e JK |
1089 | { |
1090 | bpstat bs = (bpstat) p; | |
11054881 | 1091 | struct breakpoint *b; |
2b576293 C |
1092 | struct frame_info *fr; |
1093 | int within_current_scope; | |
999dd04b | 1094 | |
557f3a0e SS |
1095 | b = bs->breakpoint_at; |
1096 | ||
1097 | if (b->exp_valid_block == NULL) | |
8af68e4e | 1098 | within_current_scope = 1; |
fa99ebe1 JK |
1099 | else |
1100 | { | |
706dc3ce JL |
1101 | /* There is no current frame at this moment. If we're going to have |
1102 | any chance of handling watchpoints on local variables, we'll need | |
1103 | the frame chain (so we can determine if we're in scope). */ | |
1104 | reinit_frame_cache(); | |
557f3a0e | 1105 | fr = find_frame_addr_in_frame_chain (b->watchpoint_frame); |
999dd04b | 1106 | within_current_scope = (fr != NULL); |
fa99ebe1 JK |
1107 | if (within_current_scope) |
1108 | /* If we end up stopping, the current frame will get selected | |
1109 | in normal_stop. So this call to select_frame won't affect | |
1110 | the user. */ | |
1111 | select_frame (fr, -1); | |
1112 | } | |
1113 | ||
8af68e4e JK |
1114 | if (within_current_scope) |
1115 | { | |
1116 | /* We use value_{,free_to_}mark because it could be a | |
1117 | *long* time before we return to the command level and | |
cef4c2e7 PS |
1118 | call free_all_values. We can't call free_all_values because |
1119 | we might be in the middle of evaluating a function call. */ | |
8af68e4e | 1120 | |
82a2edfb JK |
1121 | value_ptr mark = value_mark (); |
1122 | value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp); | |
557f3a0e | 1123 | if (!value_equal (b->val, new_val)) |
8af68e4e JK |
1124 | { |
1125 | release_value (new_val); | |
1126 | value_free_to_mark (mark); | |
557f3a0e SS |
1127 | bs->old_val = b->val; |
1128 | b->val = new_val; | |
8af68e4e JK |
1129 | /* We will stop here */ |
1130 | return WP_VALUE_CHANGED; | |
1131 | } | |
1132 | else | |
1133 | { | |
1134 | /* Nothing changed, don't do anything. */ | |
1135 | value_free_to_mark (mark); | |
1136 | /* We won't stop here */ | |
1137 | return WP_VALUE_NOT_CHANGED; | |
1138 | } | |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | /* This seems like the only logical thing to do because | |
1143 | if we temporarily ignored the watchpoint, then when | |
1144 | we reenter the block in which it is valid it contains | |
1145 | garbage (in the case of a function, it may have two | |
1146 | garbage values, one before and one after the prologue). | |
1147 | So we can't even detect the first assignment to it and | |
1148 | watch after that (since the garbage may or may not equal | |
1149 | the first value assigned). */ | |
8af68e4e | 1150 | printf_filtered ("\ |
999dd04b | 1151 | Watchpoint %d deleted because the program has left the block in\n\ |
8af68e4e | 1152 | which its expression is valid.\n", bs->breakpoint_at->number); |
557f3a0e SS |
1153 | if (b->related_breakpoint) |
1154 | delete_breakpoint (b->related_breakpoint); | |
1155 | delete_breakpoint (b); | |
999dd04b | 1156 | |
999dd04b | 1157 | return WP_DELETED; |
8af68e4e JK |
1158 | } |
1159 | } | |
1160 | ||
1161 | /* This is used when everything which needs to be printed has | |
1162 | already been printed. But we still want to print the frame. */ | |
1163 | static int | |
cabd4da6 | 1164 | print_it_done (bs) |
8af68e4e JK |
1165 | bpstat bs; |
1166 | { | |
1167 | return 0; | |
1168 | } | |
1169 | ||
cabd4da6 JK |
1170 | /* This is used when nothing should be printed for this bpstat entry. */ |
1171 | ||
1172 | static int | |
1173 | print_it_noop (bs) | |
1174 | bpstat bs; | |
1175 | { | |
1176 | return -1; | |
1177 | } | |
1178 | ||
cb6b0202 | 1179 | /* Get a bpstat associated with having just stopped at address *PC |
706dc3ce | 1180 | and frame address CORE_ADDRESS. Update *PC to point at the |
cb6b0202 JK |
1181 | breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero |
1182 | if this is known to not be a real breakpoint (it could still be a | |
1183 | watchpoint, though). */ | |
1184 | ||
bd5635a1 RP |
1185 | /* Determine whether we stopped at a breakpoint, etc, or whether we |
1186 | don't understand this stop. Result is a chain of bpstat's such that: | |
1187 | ||
1188 | if we don't understand the stop, the result is a null pointer. | |
1189 | ||
cb6b0202 | 1190 | if we understand why we stopped, the result is not null. |
bd5635a1 RP |
1191 | |
1192 | Each element of the chain refers to a particular breakpoint or | |
1193 | watchpoint at which we have stopped. (We may have stopped for | |
2d313932 | 1194 | several reasons concurrently.) |
bd5635a1 RP |
1195 | |
1196 | Each element of the chain has valid next, breakpoint_at, | |
1197 | commands, FIXME??? fields. | |
1198 | ||
1199 | */ | |
1200 | ||
bd5635a1 | 1201 | bpstat |
16726dd1 | 1202 | bpstat_stop_status (pc, not_a_breakpoint) |
bd5635a1 | 1203 | CORE_ADDR *pc; |
cb6b0202 | 1204 | int not_a_breakpoint; |
bd5635a1 | 1205 | { |
fa3764e2 | 1206 | register struct breakpoint *b, *temp; |
bd5635a1 | 1207 | CORE_ADDR bp_addr; |
bdbd5f50 | 1208 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1209 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ |
1210 | int real_breakpoint = 0; | |
bdbd5f50 | 1211 | #endif |
bd5635a1 | 1212 | /* Root of the chain of bpstat's */ |
e8bf33c4 | 1213 | struct bpstats root_bs[1]; |
bd5635a1 RP |
1214 | /* Pointer to the last thing in the chain currently. */ |
1215 | bpstat bs = root_bs; | |
11054881 KH |
1216 | static char message1[] = |
1217 | "Error evaluating expression for watchpoint %d\n"; | |
1218 | char message[sizeof (message1) + 30 /* slop */]; | |
bd5635a1 RP |
1219 | |
1220 | /* Get the address where the breakpoint would have been. */ | |
1221 | bp_addr = *pc - DECR_PC_AFTER_BREAK; | |
1222 | ||
fa3764e2 | 1223 | ALL_BREAKPOINTS_SAFE (b, temp) |
bd5635a1 | 1224 | { |
fa3764e2 JL |
1225 | if (b->enable == disabled |
1226 | || b->enable == shlib_disabled) | |
bd5635a1 | 1227 | continue; |
30875e1c | 1228 | |
999dd04b JL |
1229 | if (b->type != bp_watchpoint |
1230 | && b->type != bp_hardware_watchpoint | |
11054881 KH |
1231 | && b->type != bp_read_watchpoint |
1232 | && b->type != bp_access_watchpoint | |
1233 | && b->type != bp_hardware_breakpoint | |
999dd04b | 1234 | && b->address != bp_addr) |
bd5635a1 RP |
1235 | continue; |
1236 | ||
11054881 KH |
1237 | if (b->type == bp_hardware_breakpoint |
1238 | && b->address != (bp_addr - DECR_PC_AFTER_HW_BREAK)) | |
1239 | continue; | |
1240 | ||
999dd04b JL |
1241 | if (b->type != bp_watchpoint |
1242 | && b->type != bp_hardware_watchpoint | |
11054881 KH |
1243 | && b->type != bp_read_watchpoint |
1244 | && b->type != bp_access_watchpoint | |
999dd04b | 1245 | && not_a_breakpoint) |
cb6b0202 JK |
1246 | continue; |
1247 | ||
30875e1c SG |
1248 | /* Come here if it's a watchpoint, or if the break address matches */ |
1249 | ||
9f577285 SS |
1250 | ++(b->hit_count); |
1251 | ||
bd5635a1 RP |
1252 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ |
1253 | ||
cabd4da6 JK |
1254 | bs->stop = 1; |
1255 | bs->print = 1; | |
bd5635a1 | 1256 | |
11054881 | 1257 | sprintf (message, message1, b->number); |
999dd04b | 1258 | if (b->type == bp_watchpoint || b->type == bp_hardware_watchpoint) |
bd5635a1 | 1259 | { |
fe675038 JK |
1260 | switch (catch_errors (watchpoint_check, (char *) bs, message, |
1261 | RETURN_MASK_ALL)) | |
bd5635a1 | 1262 | { |
999dd04b | 1263 | case WP_DELETED: |
8af68e4e | 1264 | /* We've already printed what needs to be printed. */ |
cabd4da6 | 1265 | bs->print_it = print_it_done; |
8af68e4e JK |
1266 | /* Stop. */ |
1267 | break; | |
1268 | case WP_VALUE_CHANGED: | |
1269 | /* Stop. */ | |
1270 | break; | |
1271 | case WP_VALUE_NOT_CHANGED: | |
1272 | /* Don't stop. */ | |
cabd4da6 JK |
1273 | bs->print_it = print_it_noop; |
1274 | bs->stop = 0; | |
bd5635a1 | 1275 | continue; |
8af68e4e JK |
1276 | default: |
1277 | /* Can't happen. */ | |
1278 | /* FALLTHROUGH */ | |
1279 | case 0: | |
1280 | /* Error from catch_errors. */ | |
999dd04b JL |
1281 | printf_filtered ("Watchpoint %d deleted.\n", b->number); |
1282 | if (b->related_breakpoint) | |
1283 | delete_breakpoint (b->related_breakpoint); | |
1284 | delete_breakpoint (b); | |
8af68e4e | 1285 | /* We've already printed what needs to be printed. */ |
cabd4da6 | 1286 | bs->print_it = print_it_done; |
999dd04b | 1287 | |
8af68e4e JK |
1288 | /* Stop. */ |
1289 | break; | |
bd5635a1 RP |
1290 | } |
1291 | } | |
11054881 KH |
1292 | else if (b->type == bp_read_watchpoint || b->type == bp_access_watchpoint) |
1293 | { | |
1294 | CORE_ADDR addr; | |
1295 | value_ptr v; | |
1296 | int found = 0; | |
1297 | ||
1298 | addr = target_stopped_data_address(); | |
1299 | if (addr == 0) continue; | |
1300 | for (v = b->val_chain; v; v = v->next) | |
1301 | { | |
1302 | if (v->lval == lval_memory) | |
1303 | { | |
1304 | CORE_ADDR vaddr; | |
1305 | ||
1306 | vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); | |
1307 | if (addr == vaddr) | |
1308 | found = 1; | |
1309 | } | |
1310 | } | |
1311 | if (found) | |
1312 | switch (catch_errors (watchpoint_check, (char *) bs, message, | |
1313 | RETURN_MASK_ALL)) | |
1314 | { | |
1315 | case WP_DELETED: | |
1316 | /* We've already printed what needs to be printed. */ | |
1317 | bs->print_it = print_it_done; | |
1318 | /* Stop. */ | |
1319 | break; | |
1320 | case WP_VALUE_CHANGED: | |
1321 | case WP_VALUE_NOT_CHANGED: | |
1322 | /* Stop. */ | |
1323 | break; | |
1324 | default: | |
1325 | /* Can't happen. */ | |
1326 | case 0: | |
1327 | /* Error from catch_errors. */ | |
1328 | printf_filtered ("Watchpoint %d deleted.\n", b->number); | |
1329 | if (b->related_breakpoint) | |
1330 | delete_breakpoint (b->related_breakpoint); | |
1331 | delete_breakpoint (b); | |
1332 | /* We've already printed what needs to be printed. */ | |
1333 | bs->print_it = print_it_done; | |
1334 | break; | |
1335 | } | |
1336 | } | |
bdbd5f50 | 1337 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1338 | else |
1339 | real_breakpoint = 1; | |
bdbd5f50 | 1340 | #endif |
bd5635a1 | 1341 | |
706dc3ce | 1342 | if (b->frame && b->frame != (get_current_frame ())->frame) |
cabd4da6 | 1343 | bs->stop = 0; |
bd5635a1 RP |
1344 | else |
1345 | { | |
fee933f1 | 1346 | int value_is_zero = 0; |
bd5635a1 RP |
1347 | |
1348 | if (b->cond) | |
1349 | { | |
1350 | /* Need to select the frame, with all that implies | |
1351 | so that the conditions will have the right context. */ | |
1352 | select_frame (get_current_frame (), 0); | |
bdbd5f50 JG |
1353 | value_is_zero |
1354 | = catch_errors (breakpoint_cond_eval, (char *)(b->cond), | |
fe675038 JK |
1355 | "Error in testing breakpoint condition:\n", |
1356 | RETURN_MASK_ALL); | |
06b6c733 | 1357 | /* FIXME-someday, should give breakpoint # */ |
bd5635a1 RP |
1358 | free_all_values (); |
1359 | } | |
bdbd5f50 | 1360 | if (b->cond && value_is_zero) |
bd5635a1 | 1361 | { |
cabd4da6 | 1362 | bs->stop = 0; |
bd5635a1 RP |
1363 | } |
1364 | else if (b->ignore_count > 0) | |
1365 | { | |
1366 | b->ignore_count--; | |
cabd4da6 | 1367 | bs->stop = 0; |
bd5635a1 RP |
1368 | } |
1369 | else | |
1370 | { | |
1371 | /* We will stop here */ | |
30875e1c | 1372 | if (b->disposition == disable) |
bd5635a1 RP |
1373 | b->enable = disabled; |
1374 | bs->commands = b->commands; | |
1375 | if (b->silent) | |
cabd4da6 | 1376 | bs->print = 0; |
2d313932 | 1377 | if (bs->commands && STREQ ("silent", bs->commands->line)) |
bd5635a1 RP |
1378 | { |
1379 | bs->commands = bs->commands->next; | |
cabd4da6 | 1380 | bs->print = 0; |
bd5635a1 RP |
1381 | } |
1382 | } | |
1383 | } | |
cabd4da6 JK |
1384 | /* Print nothing for this entry if we dont stop or if we dont print. */ |
1385 | if (bs->stop == 0 || bs->print == 0) | |
1386 | bs->print_it = print_it_noop; | |
bd5635a1 RP |
1387 | } |
1388 | ||
1389 | bs->next = NULL; /* Terminate the chain */ | |
1390 | bs = root_bs->next; /* Re-grab the head of the chain */ | |
cabd4da6 | 1391 | #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS) |
bd5635a1 RP |
1392 | if (bs) |
1393 | { | |
bd5635a1 RP |
1394 | if (real_breakpoint) |
1395 | { | |
1396 | *pc = bp_addr; | |
1397 | #if defined (SHIFT_INST_REGS) | |
817ac7f8 | 1398 | SHIFT_INST_REGS(); |
bd5635a1 RP |
1399 | #else /* No SHIFT_INST_REGS. */ |
1400 | write_pc (bp_addr); | |
1401 | #endif /* No SHIFT_INST_REGS. */ | |
1402 | } | |
bd5635a1 | 1403 | } |
cabd4da6 | 1404 | #endif /* DECR_PC_AFTER_BREAK != 0. */ |
999dd04b JL |
1405 | |
1406 | /* The value of a hardware watchpoint hasn't changed, but the | |
1407 | intermediate memory locations we are watching may have. */ | |
11054881 KH |
1408 | if (bs && ! bs->stop && |
1409 | (bs->breakpoint_at->type == bp_hardware_watchpoint || | |
1410 | bs->breakpoint_at->type == bp_read_watchpoint || | |
1411 | bs->breakpoint_at->type == bp_access_watchpoint)) | |
999dd04b JL |
1412 | { |
1413 | remove_breakpoints (); | |
1414 | insert_breakpoints (); | |
1415 | } | |
bd5635a1 RP |
1416 | return bs; |
1417 | } | |
cabd4da6 JK |
1418 | \f |
1419 | /* Tell what to do about this bpstat. */ | |
fe675038 | 1420 | struct bpstat_what |
cabd4da6 JK |
1421 | bpstat_what (bs) |
1422 | bpstat bs; | |
1423 | { | |
1424 | /* Classify each bpstat as one of the following. */ | |
1425 | enum class { | |
fe675038 JK |
1426 | /* This bpstat element has no effect on the main_action. */ |
1427 | no_effect = 0, | |
cabd4da6 JK |
1428 | |
1429 | /* There was a watchpoint, stop but don't print. */ | |
1430 | wp_silent, | |
1431 | ||
1432 | /* There was a watchpoint, stop and print. */ | |
1433 | wp_noisy, | |
1434 | ||
1435 | /* There was a breakpoint but we're not stopping. */ | |
1436 | bp_nostop, | |
1437 | ||
1438 | /* There was a breakpoint, stop but don't print. */ | |
1439 | bp_silent, | |
1440 | ||
1441 | /* There was a breakpoint, stop and print. */ | |
1442 | bp_noisy, | |
1443 | ||
1444 | /* We hit the longjmp breakpoint. */ | |
1445 | long_jump, | |
1446 | ||
1447 | /* We hit the longjmp_resume breakpoint. */ | |
1448 | long_resume, | |
1449 | ||
d7e7e851 JK |
1450 | /* We hit the step_resume breakpoint. */ |
1451 | step_resume, | |
1452 | ||
bcc37718 JK |
1453 | /* We hit the through_sigtramp breakpoint. */ |
1454 | through_sig, | |
1455 | ||
27b6a1fa JL |
1456 | /* We hit the shared library event breakpoint. */ |
1457 | shlib_event, | |
1458 | ||
cabd4da6 JK |
1459 | /* This is just used to count how many enums there are. */ |
1460 | class_last | |
1461 | }; | |
1462 | ||
1463 | /* Here is the table which drives this routine. So that we can | |
1464 | format it pretty, we define some abbreviations for the | |
1465 | enum bpstat_what codes. */ | |
27b6a1fa JL |
1466 | #define kc BPSTAT_WHAT_KEEP_CHECKING |
1467 | #define ss BPSTAT_WHAT_STOP_SILENT | |
1468 | #define sn BPSTAT_WHAT_STOP_NOISY | |
1469 | #define sgl BPSTAT_WHAT_SINGLE | |
1470 | #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME | |
1471 | #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME | |
1472 | #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE | |
d7e7e851 | 1473 | #define sr BPSTAT_WHAT_STEP_RESUME |
bcc37718 | 1474 | #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP |
27b6a1fa | 1475 | #define shl BPSTAT_WHAT_CHECK_SHLIBS |
d7e7e851 | 1476 | |
cabd4da6 JK |
1477 | /* "Can't happen." Might want to print an error message. |
1478 | abort() is not out of the question, but chances are GDB is just | |
1479 | a bit confused, not unusable. */ | |
1480 | #define err BPSTAT_WHAT_STOP_NOISY | |
1481 | ||
1482 | /* Given an old action and a class, come up with a new action. */ | |
84d59861 JK |
1483 | /* One interesting property of this table is that wp_silent is the same |
1484 | as bp_silent and wp_noisy is the same as bp_noisy. That is because | |
1485 | after stopping, the check for whether to step over a breakpoint | |
1486 | (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without | |
1487 | reference to how we stopped. We retain separate wp_silent and bp_silent | |
1488 | codes in case we want to change that someday. */ | |
d7e7e851 JK |
1489 | |
1490 | /* step_resume entries: a step resume breakpoint overrides another | |
1491 | breakpoint of signal handling (see comment in wait_for_inferior | |
1492 | at first IN_SIGTRAMP where we set the step_resume breakpoint). */ | |
bcc37718 JK |
1493 | /* We handle the through_sigtramp_breakpoint the same way; having both |
1494 | one of those and a step_resume_breakpoint is probably very rare (?). */ | |
d7e7e851 | 1495 | |
fe675038 | 1496 | static const enum bpstat_what_main_action |
cabd4da6 JK |
1497 | table[(int)class_last][(int)BPSTAT_WHAT_LAST] = |
1498 | { | |
1499 | /* old action */ | |
27b6a1fa | 1500 | /* kc ss sn sgl slr clr clrs sr ts shl |
bcc37718 | 1501 | */ |
27b6a1fa JL |
1502 | /*no_effect*/ {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl}, |
1503 | /*wp_silent*/ {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl}, | |
1504 | /*wp_noisy*/ {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl}, | |
1505 | /*bp_nostop*/ {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl}, | |
1506 | /*bp_silent*/ {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl}, | |
1507 | /*bp_noisy*/ {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl}, | |
1508 | /*long_jump*/ {slr, ss, sn, slr, err, err, err, sr, ts, shl}, | |
1509 | /*long_resume*/ {clr, ss, sn, clrs, err, err, err, sr, ts, shl}, | |
1510 | /*step_resume*/ {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl}, | |
1511 | /*through_sig*/ {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl}, | |
1512 | /*shlib*/ {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl} | |
cabd4da6 | 1513 | }; |
27b6a1fa JL |
1514 | #undef kc |
1515 | #undef ss | |
1516 | #undef sn | |
1517 | #undef sgl | |
1518 | #undef slr | |
1519 | #undef clr | |
1520 | #undef clrs | |
cabd4da6 | 1521 | #undef err |
bcc37718 JK |
1522 | #undef sr |
1523 | #undef ts | |
27b6a1fa | 1524 | #undef shl |
fe675038 | 1525 | enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; |
84d59861 | 1526 | struct bpstat_what retval; |
cabd4da6 | 1527 | |
cef4c2e7 | 1528 | retval.call_dummy = 0; |
cabd4da6 JK |
1529 | for (; bs != NULL; bs = bs->next) |
1530 | { | |
fee933f1 | 1531 | enum class bs_class = no_effect; |
cabd4da6 JK |
1532 | if (bs->breakpoint_at == NULL) |
1533 | /* I suspect this can happen if it was a momentary breakpoint | |
1534 | which has since been deleted. */ | |
1535 | continue; | |
1536 | switch (bs->breakpoint_at->type) | |
1537 | { | |
1538 | case bp_breakpoint: | |
11054881 | 1539 | case bp_hardware_breakpoint: |
cabd4da6 JK |
1540 | case bp_until: |
1541 | case bp_finish: | |
1542 | if (bs->stop) | |
1543 | { | |
1544 | if (bs->print) | |
1545 | bs_class = bp_noisy; | |
1546 | else | |
1547 | bs_class = bp_silent; | |
1548 | } | |
1549 | else | |
1550 | bs_class = bp_nostop; | |
1551 | break; | |
1552 | case bp_watchpoint: | |
999dd04b | 1553 | case bp_hardware_watchpoint: |
11054881 KH |
1554 | case bp_read_watchpoint: |
1555 | case bp_access_watchpoint: | |
cabd4da6 JK |
1556 | if (bs->stop) |
1557 | { | |
1558 | if (bs->print) | |
1559 | bs_class = wp_noisy; | |
1560 | else | |
1561 | bs_class = wp_silent; | |
1562 | } | |
1563 | else | |
fe675038 JK |
1564 | /* There was a watchpoint, but we're not stopping. This requires |
1565 | no further action. */ | |
1566 | bs_class = no_effect; | |
cabd4da6 JK |
1567 | break; |
1568 | case bp_longjmp: | |
1569 | bs_class = long_jump; | |
1570 | break; | |
1571 | case bp_longjmp_resume: | |
1572 | bs_class = long_resume; | |
1573 | break; | |
fe675038 | 1574 | case bp_step_resume: |
fe675038 JK |
1575 | if (bs->stop) |
1576 | { | |
d7e7e851 | 1577 | bs_class = step_resume; |
fe675038 JK |
1578 | } |
1579 | else | |
1580 | /* It is for the wrong frame. */ | |
1581 | bs_class = bp_nostop; | |
bcc37718 JK |
1582 | break; |
1583 | case bp_through_sigtramp: | |
1584 | bs_class = through_sig; | |
fe675038 | 1585 | break; |
999dd04b JL |
1586 | case bp_watchpoint_scope: |
1587 | bs_class = bp_nostop; | |
1588 | break; | |
27b6a1fa JL |
1589 | case bp_shlib_event: |
1590 | bs_class = shlib_event; | |
1591 | break; | |
84d59861 JK |
1592 | case bp_call_dummy: |
1593 | /* Make sure the action is stop (silent or noisy), so infrun.c | |
1594 | pops the dummy frame. */ | |
1595 | bs_class = bp_silent; | |
1596 | retval.call_dummy = 1; | |
bb7b3800 | 1597 | break; |
cabd4da6 JK |
1598 | } |
1599 | current_action = table[(int)bs_class][(int)current_action]; | |
1600 | } | |
84d59861 JK |
1601 | retval.main_action = current_action; |
1602 | return retval; | |
cabd4da6 | 1603 | } |
bd5635a1 | 1604 | |
30875e1c SG |
1605 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
1606 | without hardware support). This isn't related to a specific bpstat, | |
1607 | just to things like whether watchpoints are set. */ | |
1608 | ||
bd5635a1 RP |
1609 | int |
1610 | bpstat_should_step () | |
1611 | { | |
1612 | struct breakpoint *b; | |
1613 | ALL_BREAKPOINTS (b) | |
30875e1c | 1614 | if (b->enable == enabled && b->type == bp_watchpoint) |
bd5635a1 RP |
1615 | return 1; |
1616 | return 0; | |
1617 | } | |
1618 | \f | |
1619 | /* Print information on breakpoint number BNUM, or -1 if all. | |
1620 | If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS | |
1621 | is nonzero, process only watchpoints. */ | |
1622 | ||
1623 | static void | |
c8950965 | 1624 | breakpoint_1 (bnum, allflag) |
bd5635a1 | 1625 | int bnum; |
80ba48f5 | 1626 | int allflag; |
bd5635a1 RP |
1627 | { |
1628 | register struct breakpoint *b; | |
1629 | register struct command_line *l; | |
1630 | register struct symbol *sym; | |
1631 | CORE_ADDR last_addr = (CORE_ADDR)-1; | |
30875e1c | 1632 | int found_a_breakpoint = 0; |
11054881 KH |
1633 | static char *bptypes[] = {"breakpoint", "hw breakpoint", |
1634 | "until", "finish", "watchpoint", | |
1635 | "hw watchpoint", "read watchpoint", | |
1636 | "acc watchpoint", "longjmp", | |
999dd04b | 1637 | "longjmp resume", "step resume", |
27b6a1fa JL |
1638 | "sigtramp", |
1639 | "watchpoint scope", "call dummy", | |
1640 | "shlib events" }; | |
80ba48f5 | 1641 | static char *bpdisps[] = {"del", "dis", "keep"}; |
30875e1c | 1642 | static char bpenables[] = "ny"; |
0a62ff36 | 1643 | char wrap_indent[80]; |
30875e1c | 1644 | |
bd5635a1 | 1645 | ALL_BREAKPOINTS (b) |
30875e1c SG |
1646 | if (bnum == -1 |
1647 | || bnum == b->number) | |
bd5635a1 | 1648 | { |
80ba48f5 SG |
1649 | /* We only print out user settable breakpoints unless the allflag is set. */ |
1650 | if (!allflag | |
1651 | && b->type != bp_breakpoint | |
11054881 | 1652 | && b->type != bp_hardware_breakpoint |
999dd04b | 1653 | && b->type != bp_watchpoint |
11054881 KH |
1654 | && b->type != bp_read_watchpoint |
1655 | && b->type != bp_access_watchpoint | |
999dd04b | 1656 | && b->type != bp_hardware_watchpoint) |
80ba48f5 SG |
1657 | continue; |
1658 | ||
30875e1c | 1659 | if (!found_a_breakpoint++) |
47ebe8fd | 1660 | { |
f2d9c058 KH |
1661 | annotate_breakpoints_headers (); |
1662 | ||
1663 | annotate_field (0); | |
1664 | printf_filtered ("Num "); | |
1665 | annotate_field (1); | |
1666 | printf_filtered ("Type "); | |
1667 | annotate_field (2); | |
1668 | printf_filtered ("Disp "); | |
1669 | annotate_field (3); | |
1670 | printf_filtered ("Enb "); | |
1671 | if (addressprint) | |
1672 | { | |
1673 | annotate_field (4); | |
1674 | printf_filtered ("Address "); | |
1675 | } | |
1676 | annotate_field (5); | |
1677 | printf_filtered ("What\n"); | |
1678 | ||
1679 | annotate_breakpoints_table (); | |
1680 | } | |
1681 | ||
1682 | annotate_record (); | |
1683 | annotate_field (0); | |
1684 | printf_filtered ("%-3d ", b->number); | |
1685 | annotate_field (1); | |
1686 | printf_filtered ("%-14s ", bptypes[(int)b->type]); | |
1687 | annotate_field (2); | |
1688 | printf_filtered ("%-4s ", bpdisps[(int)b->disposition]); | |
1689 | annotate_field (3); | |
47ebe8fd JK |
1690 | printf_filtered ("%-3c ", bpenables[(int)b->enable]); |
1691 | ||
0a62ff36 JK |
1692 | strcpy (wrap_indent, " "); |
1693 | if (addressprint) | |
1694 | strcat (wrap_indent, " "); | |
30875e1c | 1695 | switch (b->type) |
bd5635a1 | 1696 | { |
30875e1c | 1697 | case bp_watchpoint: |
999dd04b | 1698 | case bp_hardware_watchpoint: |
11054881 KH |
1699 | case bp_read_watchpoint: |
1700 | case bp_access_watchpoint: | |
47ebe8fd JK |
1701 | /* Field 4, the address, is omitted (which makes the columns |
1702 | not line up too nicely with the headers, but the effect | |
1703 | is relatively readable). */ | |
9f577285 | 1704 | annotate_field (5); |
199b2450 | 1705 | print_expression (b->exp, gdb_stdout); |
30875e1c | 1706 | break; |
84d59861 | 1707 | |
30875e1c | 1708 | case bp_breakpoint: |
11054881 | 1709 | case bp_hardware_breakpoint: |
80ba48f5 SG |
1710 | case bp_until: |
1711 | case bp_finish: | |
1712 | case bp_longjmp: | |
1713 | case bp_longjmp_resume: | |
84d59861 | 1714 | case bp_step_resume: |
bcc37718 | 1715 | case bp_through_sigtramp: |
999dd04b | 1716 | case bp_watchpoint_scope: |
bb7b3800 | 1717 | case bp_call_dummy: |
27b6a1fa | 1718 | case bp_shlib_event: |
bd5635a1 | 1719 | if (addressprint) |
47ebe8fd | 1720 | { |
f2d9c058 | 1721 | annotate_field (4); |
47ebe8fd JK |
1722 | /* FIXME-32x64: need a print_address_numeric with |
1723 | field width */ | |
1724 | printf_filtered | |
1725 | ("%s ", | |
1726 | local_hex_string_custom | |
1727 | ((unsigned long) b->address, "08l")); | |
1728 | } | |
1729 | ||
f2d9c058 | 1730 | annotate_field (5); |
bd5635a1 RP |
1731 | |
1732 | last_addr = b->address; | |
d889f6b7 | 1733 | if (b->source_file) |
bd5635a1 RP |
1734 | { |
1735 | sym = find_pc_function (b->address); | |
1736 | if (sym) | |
1737 | { | |
199b2450 TL |
1738 | fputs_filtered ("in ", gdb_stdout); |
1739 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout); | |
0a62ff36 | 1740 | wrap_here (wrap_indent); |
199b2450 | 1741 | fputs_filtered (" at ", gdb_stdout); |
bd5635a1 | 1742 | } |
199b2450 | 1743 | fputs_filtered (b->source_file, gdb_stdout); |
bd5635a1 RP |
1744 | printf_filtered (":%d", b->line_number); |
1745 | } | |
1746 | else | |
199b2450 | 1747 | print_address_symbolic (b->address, gdb_stdout, demangle, " "); |
fee933f1 | 1748 | break; |
bd5635a1 RP |
1749 | } |
1750 | ||
1751 | printf_filtered ("\n"); | |
1752 | ||
1753 | if (b->frame) | |
833e0d94 | 1754 | { |
f2d9c058 | 1755 | annotate_field (6); |
47ebe8fd | 1756 | |
833e0d94 | 1757 | printf_filtered ("\tstop only in stack frame at "); |
d24c0599 | 1758 | print_address_numeric (b->frame, 1, gdb_stdout); |
833e0d94 | 1759 | printf_filtered ("\n"); |
bcc37718 | 1760 | } |
47ebe8fd | 1761 | |
bd5635a1 RP |
1762 | if (b->cond) |
1763 | { | |
f2d9c058 | 1764 | annotate_field (7); |
47ebe8fd | 1765 | |
bd5635a1 | 1766 | printf_filtered ("\tstop only if "); |
199b2450 | 1767 | print_expression (b->cond, gdb_stdout); |
bd5635a1 RP |
1768 | printf_filtered ("\n"); |
1769 | } | |
47ebe8fd | 1770 | |
9f577285 SS |
1771 | if (show_breakpoint_hit_counts && b->hit_count) |
1772 | { | |
1773 | /* FIXME should make an annotation for this */ | |
1774 | ||
16726dd1 JK |
1775 | printf_filtered ("\tbreakpoint already hit %d time%s\n", |
1776 | b->hit_count, (b->hit_count == 1 ? "" : "s")); | |
9f577285 SS |
1777 | } |
1778 | ||
bd5635a1 | 1779 | if (b->ignore_count) |
47ebe8fd | 1780 | { |
f2d9c058 | 1781 | annotate_field (8); |
47ebe8fd JK |
1782 | |
1783 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); | |
1784 | } | |
1785 | ||
bd5635a1 | 1786 | if ((l = b->commands)) |
47ebe8fd | 1787 | { |
f2d9c058 | 1788 | annotate_field (9); |
47ebe8fd JK |
1789 | |
1790 | while (l) | |
1791 | { | |
0f8cdd9b | 1792 | print_command_line (l, 4); |
47ebe8fd JK |
1793 | l = l->next; |
1794 | } | |
1795 | } | |
bd5635a1 RP |
1796 | } |
1797 | ||
fee933f1 RP |
1798 | if (!found_a_breakpoint) |
1799 | { | |
1800 | if (bnum == -1) | |
1801 | printf_filtered ("No breakpoints or watchpoints.\n"); | |
1802 | else | |
1803 | printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum); | |
1804 | } | |
30875e1c SG |
1805 | else |
1806 | /* Compare against (CORE_ADDR)-1 in case some compiler decides | |
1807 | that a comparison of an unsigned with -1 is always false. */ | |
1808 | if (last_addr != (CORE_ADDR)-1) | |
1809 | set_next_address (last_addr); | |
47ebe8fd | 1810 | |
f2d9c058 | 1811 | annotate_breakpoints_table_end (); |
bd5635a1 RP |
1812 | } |
1813 | ||
bdbd5f50 | 1814 | /* ARGSUSED */ |
bd5635a1 RP |
1815 | static void |
1816 | breakpoints_info (bnum_exp, from_tty) | |
1817 | char *bnum_exp; | |
1818 | int from_tty; | |
1819 | { | |
1820 | int bnum = -1; | |
1821 | ||
1822 | if (bnum_exp) | |
1823 | bnum = parse_and_eval_address (bnum_exp); | |
1824 | ||
c8950965 | 1825 | breakpoint_1 (bnum, 0); |
80ba48f5 SG |
1826 | } |
1827 | ||
9b280a7f JG |
1828 | #if MAINTENANCE_CMDS |
1829 | ||
80ba48f5 SG |
1830 | /* ARGSUSED */ |
1831 | static void | |
9b280a7f | 1832 | maintenance_info_breakpoints (bnum_exp, from_tty) |
80ba48f5 SG |
1833 | char *bnum_exp; |
1834 | int from_tty; | |
1835 | { | |
1836 | int bnum = -1; | |
1837 | ||
1838 | if (bnum_exp) | |
1839 | bnum = parse_and_eval_address (bnum_exp); | |
1840 | ||
c8950965 | 1841 | breakpoint_1 (bnum, 1); |
bd5635a1 RP |
1842 | } |
1843 | ||
9b280a7f JG |
1844 | #endif |
1845 | ||
bd5635a1 RP |
1846 | /* Print a message describing any breakpoints set at PC. */ |
1847 | ||
1848 | static void | |
1849 | describe_other_breakpoints (pc) | |
1850 | register CORE_ADDR pc; | |
1851 | { | |
1852 | register int others = 0; | |
1853 | register struct breakpoint *b; | |
1854 | ||
1855 | ALL_BREAKPOINTS (b) | |
1856 | if (b->address == pc) | |
1857 | others++; | |
1858 | if (others > 0) | |
1859 | { | |
833e0d94 | 1860 | printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); |
bd5635a1 RP |
1861 | ALL_BREAKPOINTS (b) |
1862 | if (b->address == pc) | |
1863 | { | |
1864 | others--; | |
833e0d94 JK |
1865 | printf_filtered |
1866 | ("%d%s%s ", | |
1867 | b->number, | |
fa3764e2 JL |
1868 | ((b->enable == disabled || b->enable == shlib_disabled) |
1869 | ? " (disabled)" : ""), | |
833e0d94 | 1870 | (others > 1) ? "," : ((others == 1) ? " and" : "")); |
bd5635a1 | 1871 | } |
833e0d94 | 1872 | printf_filtered ("also set at pc "); |
d24c0599 | 1873 | print_address_numeric (pc, 1, gdb_stdout); |
833e0d94 | 1874 | printf_filtered (".\n"); |
bd5635a1 RP |
1875 | } |
1876 | } | |
1877 | \f | |
1878 | /* Set the default place to put a breakpoint | |
1879 | for the `break' command with no arguments. */ | |
1880 | ||
1881 | void | |
1882 | set_default_breakpoint (valid, addr, symtab, line) | |
1883 | int valid; | |
1884 | CORE_ADDR addr; | |
1885 | struct symtab *symtab; | |
1886 | int line; | |
1887 | { | |
1888 | default_breakpoint_valid = valid; | |
1889 | default_breakpoint_address = addr; | |
1890 | default_breakpoint_symtab = symtab; | |
1891 | default_breakpoint_line = line; | |
1892 | } | |
1893 | ||
1894 | /* Rescan breakpoints at address ADDRESS, | |
1895 | marking the first one as "first" and any others as "duplicates". | |
1896 | This is so that the bpt instruction is only inserted once. */ | |
1897 | ||
1898 | static void | |
1899 | check_duplicates (address) | |
1900 | CORE_ADDR address; | |
1901 | { | |
1902 | register struct breakpoint *b; | |
1903 | register int count = 0; | |
1904 | ||
30875e1c | 1905 | if (address == 0) /* Watchpoints are uninteresting */ |
f266e564 JK |
1906 | return; |
1907 | ||
bd5635a1 | 1908 | ALL_BREAKPOINTS (b) |
fa3764e2 JL |
1909 | if (b->enable != disabled |
1910 | && b->enable != shlib_disabled | |
1911 | && b->address == address) | |
bd5635a1 RP |
1912 | { |
1913 | count++; | |
1914 | b->duplicate = count > 1; | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | /* Low level routine to set a breakpoint. | |
1919 | Takes as args the three things that every breakpoint must have. | |
1920 | Returns the breakpoint object so caller can set other things. | |
1921 | Does not set the breakpoint number! | |
f266e564 JK |
1922 | Does not print anything. |
1923 | ||
1924 | ==> This routine should not be called if there is a chance of later | |
1925 | error(); otherwise it leaves a bogus breakpoint on the chain. Validate | |
1926 | your arguments BEFORE calling this routine! */ | |
bd5635a1 RP |
1927 | |
1928 | static struct breakpoint * | |
1929 | set_raw_breakpoint (sal) | |
1930 | struct symtab_and_line sal; | |
1931 | { | |
1932 | register struct breakpoint *b, *b1; | |
1933 | ||
1934 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); | |
4ed3a9ea | 1935 | memset (b, 0, sizeof (*b)); |
bd5635a1 | 1936 | b->address = sal.pc; |
d889f6b7 JK |
1937 | if (sal.symtab == NULL) |
1938 | b->source_file = NULL; | |
1939 | else | |
1940 | b->source_file = savestring (sal.symtab->filename, | |
1941 | strlen (sal.symtab->filename)); | |
706dc3ce JL |
1942 | b->language = current_language->la_language; |
1943 | b->input_radix = input_radix; | |
199b2450 | 1944 | b->thread = -1; |
bd5635a1 RP |
1945 | b->line_number = sal.line; |
1946 | b->enable = enabled; | |
1947 | b->next = 0; | |
1948 | b->silent = 0; | |
1949 | b->ignore_count = 0; | |
1950 | b->commands = NULL; | |
30875e1c | 1951 | b->frame = 0; |
bd5635a1 RP |
1952 | |
1953 | /* Add this breakpoint to the end of the chain | |
1954 | so that a list of breakpoints will come out in order | |
1955 | of increasing numbers. */ | |
1956 | ||
1957 | b1 = breakpoint_chain; | |
1958 | if (b1 == 0) | |
1959 | breakpoint_chain = b; | |
1960 | else | |
1961 | { | |
1962 | while (b1->next) | |
1963 | b1 = b1->next; | |
1964 | b1->next = b; | |
1965 | } | |
1966 | ||
1967 | check_duplicates (sal.pc); | |
6c803036 | 1968 | breakpoints_changed (); |
bd5635a1 RP |
1969 | |
1970 | return b; | |
1971 | } | |
1972 | ||
27b6a1fa JL |
1973 | static int internal_breakpoint_number = -1; |
1974 | ||
39ce6829 PS |
1975 | #ifdef GET_LONGJMP_TARGET |
1976 | ||
30875e1c | 1977 | static void |
cd10c7e3 | 1978 | create_longjmp_breakpoint (func_name) |
30875e1c | 1979 | char *func_name; |
30875e1c | 1980 | { |
30875e1c SG |
1981 | struct symtab_and_line sal; |
1982 | struct breakpoint *b; | |
1983 | ||
30875e1c SG |
1984 | if (func_name != NULL) |
1985 | { | |
1986 | struct minimal_symbol *m; | |
1987 | ||
e8bf33c4 | 1988 | m = lookup_minimal_symbol_text (func_name, NULL, (struct objfile *)NULL); |
30875e1c | 1989 | if (m) |
2d313932 | 1990 | sal.pc = SYMBOL_VALUE_ADDRESS (m); |
30875e1c SG |
1991 | else |
1992 | return; | |
1993 | } | |
1994 | else | |
1995 | sal.pc = 0; | |
1996 | ||
1997 | sal.symtab = NULL; | |
1998 | sal.line = 0; | |
30875e1c | 1999 | |
cd10c7e3 | 2000 | b = set_raw_breakpoint (sal); |
30875e1c SG |
2001 | if (!b) return; |
2002 | ||
80ba48f5 | 2003 | b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume; |
30875e1c SG |
2004 | b->disposition = donttouch; |
2005 | b->enable = disabled; | |
2006 | b->silent = 1; | |
80ba48f5 SG |
2007 | if (func_name) |
2008 | b->addr_string = strsave(func_name); | |
2009 | b->number = internal_breakpoint_number--; | |
30875e1c | 2010 | } |
30875e1c | 2011 | |
39ce6829 PS |
2012 | #endif /* #ifdef GET_LONGJMP_TARGET */ |
2013 | ||
30875e1c SG |
2014 | /* Call this routine when stepping and nexting to enable a breakpoint if we do |
2015 | a longjmp(). When we hit that breakpoint, call | |
2016 | set_longjmp_resume_breakpoint() to figure out where we are going. */ | |
2017 | ||
2018 | void | |
2019 | enable_longjmp_breakpoint() | |
2020 | { | |
80ba48f5 SG |
2021 | register struct breakpoint *b; |
2022 | ||
2023 | ALL_BREAKPOINTS (b) | |
2024 | if (b->type == bp_longjmp) | |
9b280a7f JG |
2025 | { |
2026 | b->enable = enabled; | |
2027 | check_duplicates (b->address); | |
2028 | } | |
30875e1c SG |
2029 | } |
2030 | ||
2031 | void | |
2032 | disable_longjmp_breakpoint() | |
2033 | { | |
80ba48f5 SG |
2034 | register struct breakpoint *b; |
2035 | ||
2036 | ALL_BREAKPOINTS (b) | |
9b280a7f | 2037 | if ( b->type == bp_longjmp |
80ba48f5 | 2038 | || b->type == bp_longjmp_resume) |
9b280a7f JG |
2039 | { |
2040 | b->enable = disabled; | |
2041 | check_duplicates (b->address); | |
2042 | } | |
30875e1c SG |
2043 | } |
2044 | ||
27b6a1fa JL |
2045 | #ifdef SOLIB_ADD |
2046 | void | |
2047 | remove_solib_event_breakpoints () | |
2048 | { | |
fa3764e2 | 2049 | register struct breakpoint *b, *temp; |
27b6a1fa | 2050 | |
fa3764e2 | 2051 | ALL_BREAKPOINTS_SAFE (b, temp) |
27b6a1fa JL |
2052 | if (b->type == bp_shlib_event) |
2053 | delete_breakpoint (b); | |
2054 | } | |
2055 | ||
2056 | void | |
2057 | create_solib_event_breakpoint (address) | |
2058 | CORE_ADDR address; | |
2059 | { | |
2060 | struct breakpoint *b; | |
2061 | struct symtab_and_line sal; | |
2062 | ||
2063 | sal.pc = address; | |
2064 | sal.symtab = NULL; | |
2065 | sal.line = 0; | |
2066 | b = set_raw_breakpoint (sal); | |
2067 | b->number = internal_breakpoint_number--; | |
2068 | b->disposition = donttouch; | |
2069 | b->type = bp_shlib_event; | |
2070 | } | |
fa3764e2 JL |
2071 | |
2072 | /* Try to reenable any breakpoints in shared libraries. */ | |
2073 | void | |
2074 | re_enable_breakpoints_in_shlibs () | |
2075 | { | |
2076 | struct breakpoint *b; | |
2077 | ||
2078 | ALL_BREAKPOINTS (b) | |
2079 | if (b->enable == shlib_disabled) | |
2080 | { | |
2081 | char buf[1]; | |
2082 | ||
2083 | /* Do not reenable the breakpoint if the shared library | |
2084 | is still not mapped in. */ | |
2085 | if (target_read_memory (b->address, buf, 1) == 0) | |
2086 | b->enable = enabled; | |
2087 | } | |
2088 | } | |
2089 | ||
27b6a1fa JL |
2090 | #endif |
2091 | ||
11054881 KH |
2092 | int |
2093 | hw_breakpoint_used_count() | |
2094 | { | |
2095 | register struct breakpoint *b; | |
2096 | int i = 0; | |
2097 | ||
2098 | ALL_BREAKPOINTS (b) | |
2099 | { | |
2100 | if (b->type == bp_hardware_breakpoint && b->enable == enabled) | |
2101 | i++; | |
2102 | } | |
2103 | ||
2104 | return i; | |
2105 | } | |
2106 | ||
2107 | int | |
2108 | hw_watchpoint_used_count(type, other_type_used) | |
2109 | enum bptype type; | |
2110 | int *other_type_used; | |
2111 | { | |
2112 | register struct breakpoint *b; | |
2113 | int i = 0; | |
2114 | ||
2115 | *other_type_used = 0; | |
2116 | ALL_BREAKPOINTS (b) | |
2117 | { | |
2118 | if (b->enable == enabled) | |
2119 | { | |
2120 | if (b->type == type) i++; | |
2121 | else if ((b->type == bp_hardware_watchpoint || | |
2122 | b->type == bp_read_watchpoint || | |
2123 | b->type == bp_access_watchpoint) | |
2124 | && b->enable == enabled) | |
2125 | *other_type_used = 1; | |
2126 | } | |
2127 | } | |
2128 | return i; | |
2129 | } | |
2130 | ||
30875e1c SG |
2131 | /* Call this after hitting the longjmp() breakpoint. Use this to set a new |
2132 | breakpoint at the target of the jmp_buf. | |
80ba48f5 SG |
2133 | |
2134 | FIXME - This ought to be done by setting a temporary breakpoint that gets | |
2135 | deleted automatically... | |
30875e1c SG |
2136 | */ |
2137 | ||
2138 | void | |
2139 | set_longjmp_resume_breakpoint(pc, frame) | |
2140 | CORE_ADDR pc; | |
706dc3ce | 2141 | struct frame_info *frame; |
30875e1c | 2142 | { |
80ba48f5 SG |
2143 | register struct breakpoint *b; |
2144 | ||
2145 | ALL_BREAKPOINTS (b) | |
2146 | if (b->type == bp_longjmp_resume) | |
2147 | { | |
2148 | b->address = pc; | |
2149 | b->enable = enabled; | |
2150 | if (frame != NULL) | |
706dc3ce | 2151 | b->frame = frame->frame; |
80ba48f5 SG |
2152 | else |
2153 | b->frame = 0; | |
9b280a7f | 2154 | check_duplicates (b->address); |
80ba48f5 SG |
2155 | return; |
2156 | } | |
30875e1c SG |
2157 | } |
2158 | ||
bd5635a1 RP |
2159 | /* Set a breakpoint that will evaporate an end of command |
2160 | at address specified by SAL. | |
2161 | Restrict it to frame FRAME if FRAME is nonzero. */ | |
2162 | ||
30875e1c SG |
2163 | struct breakpoint * |
2164 | set_momentary_breakpoint (sal, frame, type) | |
bd5635a1 | 2165 | struct symtab_and_line sal; |
706dc3ce | 2166 | struct frame_info *frame; |
30875e1c | 2167 | enum bptype type; |
bd5635a1 RP |
2168 | { |
2169 | register struct breakpoint *b; | |
2170 | b = set_raw_breakpoint (sal); | |
30875e1c SG |
2171 | b->type = type; |
2172 | b->enable = enabled; | |
2173 | b->disposition = donttouch; | |
706dc3ce | 2174 | b->frame = (frame ? frame->frame : 0); |
2b576293 C |
2175 | |
2176 | /* If we're debugging a multi-threaded program, then we | |
2177 | want momentary breakpoints to be active in only a | |
2178 | single thread of control. */ | |
2179 | if (in_thread_list (inferior_pid)) | |
2180 | b->thread = pid_to_thread_id (inferior_pid); | |
2181 | ||
30875e1c | 2182 | return b; |
bd5635a1 RP |
2183 | } |
2184 | ||
30875e1c | 2185 | #if 0 |
bd5635a1 RP |
2186 | void |
2187 | clear_momentary_breakpoints () | |
2188 | { | |
fa3764e2 JL |
2189 | register struct breakpoint *b, *temp; |
2190 | ALL_BREAKPOINTS_SAFE (b, temp) | |
30875e1c | 2191 | if (b->disposition == delete) |
bd5635a1 RP |
2192 | { |
2193 | delete_breakpoint (b); | |
2194 | break; | |
2195 | } | |
2196 | } | |
30875e1c | 2197 | #endif |
bd5635a1 RP |
2198 | \f |
2199 | /* Tell the user we have just set a breakpoint B. */ | |
9f577285 | 2200 | |
bd5635a1 RP |
2201 | static void |
2202 | mention (b) | |
2203 | struct breakpoint *b; | |
2204 | { | |
9f577285 SS |
2205 | int say_where = 0; |
2206 | ||
d2a85f11 JMD |
2207 | /* FIXME: This is misplaced; mention() is called by things (like hitting a |
2208 | watchpoint) other than breakpoint creation. It should be possible to | |
2209 | clean this up and at the same time replace the random calls to | |
2210 | breakpoint_changed with this hook, as has already been done for | |
2211 | delete_breakpoint_hook and so on. */ | |
754e5da2 SG |
2212 | if (create_breakpoint_hook) |
2213 | create_breakpoint_hook (b); | |
2214 | ||
30875e1c | 2215 | switch (b->type) |
bd5635a1 | 2216 | { |
30875e1c | 2217 | case bp_watchpoint: |
bd5635a1 | 2218 | printf_filtered ("Watchpoint %d: ", b->number); |
199b2450 | 2219 | print_expression (b->exp, gdb_stdout); |
30875e1c | 2220 | break; |
999dd04b JL |
2221 | case bp_hardware_watchpoint: |
2222 | printf_filtered ("Hardware watchpoint %d: ", b->number); | |
2223 | print_expression (b->exp, gdb_stdout); | |
2224 | break; | |
11054881 KH |
2225 | case bp_read_watchpoint: |
2226 | printf_filtered ("Hardware read watchpoint %d: ", b->number); | |
2227 | print_expression (b->exp, gdb_stdout); | |
2228 | break; | |
2229 | case bp_access_watchpoint: | |
2230 | printf_filtered ("Hardware access(read/write) watchpoint %d: ",b->number); | |
2231 | print_expression (b->exp, gdb_stdout); | |
2232 | break; | |
30875e1c | 2233 | case bp_breakpoint: |
9f577285 SS |
2234 | printf_filtered ("Breakpoint %d", b->number); |
2235 | say_where = 1; | |
51b57ded | 2236 | break; |
11054881 | 2237 | case bp_hardware_breakpoint: |
9f577285 SS |
2238 | printf_filtered ("Hardware assisted breakpoint %d", b->number); |
2239 | say_where = 1; | |
11054881 | 2240 | break; |
51b57ded FF |
2241 | case bp_until: |
2242 | case bp_finish: | |
2243 | case bp_longjmp: | |
2244 | case bp_longjmp_resume: | |
fee933f1 | 2245 | case bp_step_resume: |
bcc37718 | 2246 | case bp_through_sigtramp: |
199b2450 | 2247 | case bp_call_dummy: |
999dd04b | 2248 | case bp_watchpoint_scope: |
fa3764e2 | 2249 | case bp_shlib_event: |
51b57ded | 2250 | break; |
bd5635a1 | 2251 | } |
9f577285 SS |
2252 | if (say_where) |
2253 | { | |
2254 | if (addressprint || b->source_file == NULL) | |
2255 | { | |
2256 | printf_filtered (" at "); | |
2257 | print_address_numeric (b->address, 1, gdb_stdout); | |
2258 | } | |
2259 | if (b->source_file) | |
2260 | printf_filtered (": file %s, line %d.", | |
2261 | b->source_file, b->line_number); | |
2262 | } | |
bd5635a1 RP |
2263 | printf_filtered ("\n"); |
2264 | } | |
2265 | ||
2266 | #if 0 | |
2267 | /* Nobody calls this currently. */ | |
2268 | /* Set a breakpoint from a symtab and line. | |
2269 | If TEMPFLAG is nonzero, it is a temporary breakpoint. | |
2270 | ADDR_STRING is a malloc'd string holding the name of where we are | |
2271 | setting the breakpoint. This is used later to re-set it after the | |
2272 | program is relinked and symbols are reloaded. | |
2273 | Print the same confirmation messages that the breakpoint command prints. */ | |
2274 | ||
2275 | void | |
2276 | set_breakpoint (s, line, tempflag, addr_string) | |
2277 | struct symtab *s; | |
2278 | int line; | |
2279 | int tempflag; | |
2280 | char *addr_string; | |
2281 | { | |
2282 | register struct breakpoint *b; | |
2283 | struct symtab_and_line sal; | |
2284 | ||
2285 | sal.symtab = s; | |
2286 | sal.line = line; | |
30875e1c SG |
2287 | sal.pc = 0; |
2288 | resolve_sal_pc (&sal); /* Might error out */ | |
2289 | describe_other_breakpoints (sal.pc); | |
bd5635a1 | 2290 | |
30875e1c SG |
2291 | b = set_raw_breakpoint (sal); |
2292 | set_breakpoint_count (breakpoint_count + 1); | |
2293 | b->number = breakpoint_count; | |
2294 | b->type = bp_breakpoint; | |
2295 | b->cond = 0; | |
2296 | b->addr_string = addr_string; | |
2297 | b->enable = enabled; | |
2298 | b->disposition = tempflag ? delete : donttouch; | |
bd5635a1 | 2299 | |
30875e1c | 2300 | mention (b); |
bd5635a1 | 2301 | } |
30875e1c | 2302 | #endif /* 0 */ |
bd5635a1 RP |
2303 | \f |
2304 | /* Set a breakpoint according to ARG (function, linenum or *address) | |
11054881 KH |
2305 | flag: first bit : 0 non-temporary, 1 temporary. |
2306 | second bit : 0 normal breakpoint, 1 hardware breakpoint. */ | |
bd5635a1 RP |
2307 | |
2308 | static void | |
11054881 | 2309 | break_command_1 (arg, flag, from_tty) |
bd5635a1 | 2310 | char *arg; |
11054881 | 2311 | int flag, from_tty; |
bd5635a1 | 2312 | { |
11054881 | 2313 | int tempflag, hardwareflag; |
bd5635a1 RP |
2314 | struct symtabs_and_lines sals; |
2315 | struct symtab_and_line sal; | |
2316 | register struct expression *cond = 0; | |
2317 | register struct breakpoint *b; | |
2318 | ||
2319 | /* Pointers in arg to the start, and one past the end, of the condition. */ | |
2320 | char *cond_start = NULL; | |
fee933f1 | 2321 | char *cond_end = NULL; |
bd5635a1 RP |
2322 | /* Pointers in arg to the start, and one past the end, |
2323 | of the address part. */ | |
2324 | char *addr_start = NULL; | |
fee933f1 | 2325 | char *addr_end = NULL; |
d889f6b7 | 2326 | struct cleanup *old_chain; |
fee933f1 | 2327 | struct cleanup *canonical_strings_chain = NULL; |
d889f6b7 | 2328 | char **canonical = (char **)NULL; |
bd5635a1 | 2329 | int i; |
199b2450 | 2330 | int thread; |
bd5635a1 | 2331 | |
e8bf33c4 JK |
2332 | hardwareflag = flag & BP_HARDWAREFLAG; |
2333 | tempflag = flag & BP_TEMPFLAG; | |
11054881 | 2334 | |
bd5635a1 RP |
2335 | sals.sals = NULL; |
2336 | sals.nelts = 0; | |
2337 | ||
2338 | sal.line = sal.pc = sal.end = 0; | |
2339 | sal.symtab = 0; | |
2340 | ||
2341 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ | |
2342 | ||
2343 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
2344 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
2345 | { | |
2346 | if (default_breakpoint_valid) | |
2347 | { | |
2348 | sals.sals = (struct symtab_and_line *) | |
2349 | xmalloc (sizeof (struct symtab_and_line)); | |
2350 | sal.pc = default_breakpoint_address; | |
2351 | sal.line = default_breakpoint_line; | |
2352 | sal.symtab = default_breakpoint_symtab; | |
2353 | sals.sals[0] = sal; | |
2354 | sals.nelts = 1; | |
2355 | } | |
2356 | else | |
2357 | error ("No default breakpoint address now."); | |
2358 | } | |
2359 | else | |
2360 | { | |
2361 | addr_start = arg; | |
2362 | ||
2363 | /* Force almost all breakpoints to be in terms of the | |
2364 | current_source_symtab (which is decode_line_1's default). This | |
2365 | should produce the results we want almost all of the time while | |
2366 | leaving default_breakpoint_* alone. */ | |
2367 | if (default_breakpoint_valid | |
2368 | && (!current_source_symtab | |
2369 | || (arg && (*arg == '+' || *arg == '-')))) | |
2370 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
d889f6b7 | 2371 | default_breakpoint_line, &canonical); |
bd5635a1 | 2372 | else |
d889f6b7 | 2373 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical); |
bd5635a1 RP |
2374 | |
2375 | addr_end = arg; | |
2376 | } | |
2377 | ||
2378 | if (! sals.nelts) | |
2379 | return; | |
2380 | ||
d889f6b7 JK |
2381 | /* Make sure that all storage allocated in decode_line_1 gets freed in case |
2382 | the following `for' loop errors out. */ | |
2383 | old_chain = make_cleanup (free, sals.sals); | |
2384 | if (canonical != (char **)NULL) | |
2385 | { | |
2386 | make_cleanup (free, canonical); | |
2387 | canonical_strings_chain = make_cleanup (null_cleanup, 0); | |
2388 | for (i = 0; i < sals.nelts; i++) | |
2389 | { | |
2390 | if (canonical[i] != NULL) | |
2391 | make_cleanup (free, canonical[i]); | |
2392 | } | |
2393 | } | |
2394 | ||
199b2450 TL |
2395 | thread = -1; /* No specific thread yet */ |
2396 | ||
30875e1c SG |
2397 | /* Resolve all line numbers to PC's, and verify that conditions |
2398 | can be parsed, before setting any breakpoints. */ | |
bd5635a1 RP |
2399 | for (i = 0; i < sals.nelts; i++) |
2400 | { | |
199b2450 TL |
2401 | char *tok, *end_tok; |
2402 | int toklen; | |
2403 | ||
30875e1c | 2404 | resolve_sal_pc (&sals.sals[i]); |
bd5635a1 | 2405 | |
199b2450 TL |
2406 | tok = arg; |
2407 | ||
2408 | while (tok && *tok) | |
bd5635a1 | 2409 | { |
199b2450 TL |
2410 | while (*tok == ' ' || *tok == '\t') |
2411 | tok++; | |
2412 | ||
2413 | end_tok = tok; | |
2414 | ||
2415 | while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') | |
2416 | end_tok++; | |
2417 | ||
2418 | toklen = end_tok - tok; | |
2419 | ||
2420 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) | |
2421 | { | |
2422 | tok = cond_start = end_tok + 1; | |
2423 | cond = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); | |
2424 | cond_end = tok; | |
2425 | } | |
2426 | else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) | |
bd5635a1 | 2427 | { |
199b2450 TL |
2428 | char *tmptok; |
2429 | ||
2430 | tok = end_tok + 1; | |
2431 | tmptok = tok; | |
2432 | thread = strtol (tok, &tok, 0); | |
2433 | if (tok == tmptok) | |
2434 | error ("Junk after thread keyword."); | |
2435 | if (!valid_thread_id (thread)) | |
2436 | error ("Unknown thread %d\n", thread); | |
bd5635a1 RP |
2437 | } |
2438 | else | |
2439 | error ("Junk at end of arguments."); | |
2440 | } | |
bd5635a1 | 2441 | } |
11054881 KH |
2442 | if (hardwareflag) |
2443 | { | |
557f3a0e SS |
2444 | int i, target_resources_ok; |
2445 | ||
2446 | i = hw_breakpoint_used_count (); | |
2447 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT ( | |
2448 | bp_hardware_breakpoint, i + sals.nelts, 0); | |
11054881 KH |
2449 | if (target_resources_ok == 0) |
2450 | error ("No hardware breakpoint support in the target."); | |
2451 | else if (target_resources_ok < 0) | |
2452 | error ("Hardware breakpoints used exceeds limit."); | |
2453 | } | |
bd5635a1 | 2454 | |
d889f6b7 JK |
2455 | /* Remove the canonical strings from the cleanup, they are needed below. */ |
2456 | if (canonical != (char **)NULL) | |
2457 | discard_cleanups (canonical_strings_chain); | |
2458 | ||
30875e1c | 2459 | /* Now set all the breakpoints. */ |
bd5635a1 RP |
2460 | for (i = 0; i < sals.nelts; i++) |
2461 | { | |
2462 | sal = sals.sals[i]; | |
2463 | ||
2464 | if (from_tty) | |
2465 | describe_other_breakpoints (sal.pc); | |
2466 | ||
2467 | b = set_raw_breakpoint (sal); | |
2468 | set_breakpoint_count (breakpoint_count + 1); | |
2469 | b->number = breakpoint_count; | |
11054881 | 2470 | b->type = hardwareflag ? bp_hardware_breakpoint : bp_breakpoint; |
bd5635a1 | 2471 | b->cond = cond; |
199b2450 | 2472 | b->thread = thread; |
0a97f6c4 | 2473 | |
d889f6b7 JK |
2474 | /* If a canonical line spec is needed use that instead of the |
2475 | command string. */ | |
2476 | if (canonical != (char **)NULL && canonical[i] != NULL) | |
2477 | b->addr_string = canonical[i]; | |
2478 | else if (addr_start) | |
bd5635a1 RP |
2479 | b->addr_string = savestring (addr_start, addr_end - addr_start); |
2480 | if (cond_start) | |
2481 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |
2482 | ||
30875e1c | 2483 | b->enable = enabled; |
e8bf33c4 | 2484 | b->disposition = tempflag ? del : donttouch; |
bd5635a1 RP |
2485 | |
2486 | mention (b); | |
2487 | } | |
2488 | ||
2489 | if (sals.nelts > 1) | |
2490 | { | |
833e0d94 JK |
2491 | printf_filtered ("Multiple breakpoints were set.\n"); |
2492 | printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
bd5635a1 | 2493 | } |
d889f6b7 | 2494 | do_cleanups (old_chain); |
bd5635a1 RP |
2495 | } |
2496 | ||
30875e1c SG |
2497 | /* Helper function for break_command_1 and disassemble_command. */ |
2498 | ||
2499 | void | |
2500 | resolve_sal_pc (sal) | |
2501 | struct symtab_and_line *sal; | |
2502 | { | |
2503 | CORE_ADDR pc; | |
2504 | ||
2505 | if (sal->pc == 0 && sal->symtab != 0) | |
2506 | { | |
2507 | pc = find_line_pc (sal->symtab, sal->line); | |
2508 | if (pc == 0) | |
2509 | error ("No line %d in file \"%s\".", | |
2510 | sal->line, sal->symtab->filename); | |
2511 | sal->pc = pc; | |
2512 | } | |
2513 | } | |
2514 | ||
bd5635a1 RP |
2515 | void |
2516 | break_command (arg, from_tty) | |
2517 | char *arg; | |
2518 | int from_tty; | |
2519 | { | |
2520 | break_command_1 (arg, 0, from_tty); | |
2521 | } | |
2522 | ||
2523 | static void | |
2524 | tbreak_command (arg, from_tty) | |
2525 | char *arg; | |
2526 | int from_tty; | |
2527 | { | |
11054881 KH |
2528 | break_command_1 (arg, BP_TEMPFLAG, from_tty); |
2529 | } | |
2530 | ||
2531 | static void | |
2532 | hbreak_command (arg, from_tty) | |
2533 | char *arg; | |
2534 | int from_tty; | |
2535 | { | |
2536 | break_command_1 (arg, BP_HARDWAREFLAG, from_tty); | |
2537 | } | |
2538 | ||
2539 | static void | |
2540 | thbreak_command (arg, from_tty) | |
2541 | char *arg; | |
2542 | int from_tty; | |
2543 | { | |
2544 | break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty); | |
bd5635a1 RP |
2545 | } |
2546 | ||
bdbd5f50 | 2547 | /* ARGSUSED */ |
11054881 KH |
2548 | /* accessflag: 0: watch write, 1: watch read, 2: watch access(read or write) |
2549 | */ | |
bd5635a1 | 2550 | static void |
11054881 | 2551 | watch_command_1 (arg, accessflag, from_tty) |
bd5635a1 | 2552 | char *arg; |
11054881 | 2553 | int accessflag; |
bd5635a1 RP |
2554 | int from_tty; |
2555 | { | |
2556 | struct breakpoint *b; | |
2557 | struct symtab_and_line sal; | |
f266e564 JK |
2558 | struct expression *exp; |
2559 | struct block *exp_valid_block; | |
11054881 | 2560 | struct value *val, *mark; |
706dc3ce | 2561 | struct frame_info *frame, *prev_frame; |
11054881 KH |
2562 | char *exp_start = NULL; |
2563 | char *exp_end = NULL; | |
2564 | char *tok, *end_tok; | |
2565 | int toklen; | |
2566 | char *cond_start = NULL; | |
2567 | char *cond_end = NULL; | |
2568 | struct expression *cond = NULL; | |
2569 | int i, other_type_used, target_resources_ok; | |
2570 | enum bptype bp_type; | |
2571 | int mem_cnt = 0; | |
bd5635a1 | 2572 | |
30875e1c | 2573 | sal.pc = 0; |
bd5635a1 RP |
2574 | sal.symtab = NULL; |
2575 | sal.line = 0; | |
2576 | ||
f266e564 JK |
2577 | /* Parse arguments. */ |
2578 | innermost_block = NULL; | |
11054881 KH |
2579 | exp_start = arg; |
2580 | exp = parse_exp_1 (&arg, 0, 0); | |
2581 | exp_end = arg; | |
f266e564 | 2582 | exp_valid_block = innermost_block; |
11054881 | 2583 | mark = value_mark (); |
f266e564 JK |
2584 | val = evaluate_expression (exp); |
2585 | release_value (val); | |
2d313932 JK |
2586 | if (VALUE_LAZY (val)) |
2587 | value_fetch_lazy (val); | |
f266e564 | 2588 | |
11054881 KH |
2589 | tok = arg; |
2590 | while (*tok == ' ' || *tok == '\t') | |
2591 | tok++; | |
2592 | end_tok = tok; | |
2593 | ||
2594 | while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') | |
2595 | end_tok++; | |
2596 | ||
2597 | toklen = end_tok - tok; | |
2598 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) | |
2599 | { | |
2600 | tok = cond_start = end_tok + 1; | |
2601 | cond = parse_exp_1 (&tok, 0, 0); | |
2602 | cond_end = tok; | |
2603 | } | |
2604 | if (*tok) | |
2605 | error("Junk at end of command."); | |
2606 | ||
2607 | if (accessflag == 1) bp_type = bp_read_watchpoint; | |
2608 | else if (accessflag == 2) bp_type = bp_access_watchpoint; | |
2609 | else bp_type = bp_hardware_watchpoint; | |
2610 | ||
2611 | mem_cnt = can_use_hardware_watchpoint (val); | |
2612 | if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint) | |
2613 | error ("Expression cannot be implemented with read/access watchpoint."); | |
2614 | if (mem_cnt != 0) { | |
2615 | i = hw_watchpoint_used_count (bp_type, &other_type_used); | |
2616 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT( | |
2617 | bp_type, i + mem_cnt, other_type_used); | |
2618 | if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint) | |
2619 | error ("Target does not have this type of hardware watchpoint support."); | |
2620 | if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint) | |
2621 | error ("Target resources have been allocated for other types of watchpoints."); | |
2622 | } | |
2623 | ||
f266e564 | 2624 | /* Now set up the breakpoint. */ |
bd5635a1 RP |
2625 | b = set_raw_breakpoint (sal); |
2626 | set_breakpoint_count (breakpoint_count + 1); | |
2627 | b->number = breakpoint_count; | |
30875e1c | 2628 | b->disposition = donttouch; |
f266e564 JK |
2629 | b->exp = exp; |
2630 | b->exp_valid_block = exp_valid_block; | |
11054881 | 2631 | b->exp_string = savestring (exp_start, exp_end - exp_start); |
f266e564 | 2632 | b->val = val; |
11054881 KH |
2633 | b->cond = cond; |
2634 | if (cond_start) | |
2635 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |
2636 | else | |
2637 | b->cond_string = 0; | |
2638 | ||
999dd04b JL |
2639 | frame = block_innermost_frame (exp_valid_block); |
2640 | if (frame) | |
2641 | { | |
2642 | prev_frame = get_prev_frame (frame); | |
706dc3ce | 2643 | b->watchpoint_frame = frame->frame; |
999dd04b JL |
2644 | } |
2645 | else | |
9e8db445 | 2646 | b->watchpoint_frame = (CORE_ADDR)0; |
999dd04b | 2647 | |
11054881 KH |
2648 | if (mem_cnt && target_resources_ok > 0) |
2649 | b->type = bp_type; | |
999dd04b JL |
2650 | else |
2651 | b->type = bp_watchpoint; | |
2652 | ||
2653 | /* If the expression is "local", then set up a "watchpoint scope" | |
2654 | breakpoint at the point where we've left the scope of the watchpoint | |
2655 | expression. */ | |
2656 | if (innermost_block) | |
2657 | { | |
2658 | struct breakpoint *scope_breakpoint; | |
2659 | struct symtab_and_line scope_sal; | |
2660 | ||
2661 | if (prev_frame) | |
2662 | { | |
2663 | scope_sal.pc = get_frame_pc (prev_frame); | |
2664 | scope_sal.symtab = NULL; | |
2665 | scope_sal.line = 0; | |
2666 | ||
2667 | scope_breakpoint = set_raw_breakpoint (scope_sal); | |
2668 | set_breakpoint_count (breakpoint_count + 1); | |
2669 | scope_breakpoint->number = breakpoint_count; | |
2670 | ||
2671 | scope_breakpoint->type = bp_watchpoint_scope; | |
2672 | scope_breakpoint->enable = enabled; | |
2673 | ||
2674 | /* Automatically delete the breakpoint when it hits. */ | |
e8bf33c4 | 2675 | scope_breakpoint->disposition = del; |
999dd04b JL |
2676 | |
2677 | /* Only break in the proper frame (help with recursion). */ | |
2678 | scope_breakpoint->frame = prev_frame->frame; | |
2679 | ||
2680 | /* Set the address at which we will stop. */ | |
2681 | scope_breakpoint->address = get_frame_pc (prev_frame); | |
2682 | ||
2683 | /* The scope breakpoint is related to the watchpoint. We | |
2684 | will need to act on them together. */ | |
2685 | b->related_breakpoint = scope_breakpoint; | |
2686 | } | |
2687 | } | |
11054881 | 2688 | value_free_to_mark (mark); |
bd5635a1 RP |
2689 | mention (b); |
2690 | } | |
999dd04b | 2691 | |
11054881 KH |
2692 | /* Return count of locations need to be watched and can be handled |
2693 | in hardware. If the watchpoint can not be handled | |
999dd04b JL |
2694 | in hardware return zero. */ |
2695 | ||
2696 | static int | |
11054881 KH |
2697 | can_use_hardware_watchpoint (v) |
2698 | struct value *v; | |
999dd04b | 2699 | { |
11054881 | 2700 | int found_memory_cnt = 0; |
999dd04b JL |
2701 | |
2702 | /* Make sure all the intermediate values are in memory. Also make sure | |
2703 | we found at least one memory expression. Guards against watch 0x12345, | |
2704 | which is meaningless, but could cause errors if one tries to insert a | |
2705 | hardware watchpoint for the constant expression. */ | |
11054881 | 2706 | for ( ; v; v = v->next) |
999dd04b | 2707 | { |
11054881 KH |
2708 | if (v->lval == lval_memory) |
2709 | { | |
2710 | if (TYPE_LENGTH (VALUE_TYPE (v)) <= REGISTER_SIZE) | |
2711 | found_memory_cnt++; | |
2712 | } | |
2713 | else if (v->lval != not_lval && v->modifiable == 0) | |
999dd04b | 2714 | return 0; |
999dd04b JL |
2715 | } |
2716 | ||
2717 | /* The expression itself looks suitable for using a hardware | |
2718 | watchpoint, but give the target machine a chance to reject it. */ | |
11054881 KH |
2719 | return found_memory_cnt; |
2720 | } | |
2721 | ||
2722 | static void watch_command (arg, from_tty) | |
2723 | char *arg; | |
2724 | int from_tty; | |
2725 | { | |
2726 | watch_command_1 (arg, 0, from_tty); | |
2727 | } | |
2728 | ||
2729 | static void rwatch_command (arg, from_tty) | |
2730 | char *arg; | |
2731 | int from_tty; | |
2732 | { | |
2733 | watch_command_1 (arg, 1, from_tty); | |
2734 | } | |
2735 | ||
2736 | static void awatch_command (arg, from_tty) | |
2737 | char *arg; | |
2738 | int from_tty; | |
2739 | { | |
2740 | watch_command_1 (arg, 2, from_tty); | |
999dd04b JL |
2741 | } |
2742 | ||
bd5635a1 | 2743 | \f |
706dc3ce JL |
2744 | /* Helper routine for the until_command routine in infcmd.c. Here |
2745 | because it uses the mechanisms of breakpoints. */ | |
2746 | ||
bdbd5f50 | 2747 | /* ARGSUSED */ |
bd5635a1 RP |
2748 | void |
2749 | until_break_command (arg, from_tty) | |
2750 | char *arg; | |
2751 | int from_tty; | |
2752 | { | |
2753 | struct symtabs_and_lines sals; | |
2754 | struct symtab_and_line sal; | |
706dc3ce | 2755 | struct frame_info *prev_frame = get_prev_frame (selected_frame); |
30875e1c SG |
2756 | struct breakpoint *breakpoint; |
2757 | struct cleanup *old_chain; | |
bd5635a1 RP |
2758 | |
2759 | clear_proceed_status (); | |
2760 | ||
2761 | /* Set a breakpoint where the user wants it and at return from | |
2762 | this function */ | |
2763 | ||
2764 | if (default_breakpoint_valid) | |
2765 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
d889f6b7 | 2766 | default_breakpoint_line, (char ***)NULL); |
bd5635a1 | 2767 | else |
d889f6b7 | 2768 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL); |
bd5635a1 RP |
2769 | |
2770 | if (sals.nelts != 1) | |
2771 | error ("Couldn't get information on specified line."); | |
2772 | ||
2773 | sal = sals.sals[0]; | |
c8950965 | 2774 | free ((PTR)sals.sals); /* malloc'd, so freed */ |
bd5635a1 RP |
2775 | |
2776 | if (*arg) | |
2777 | error ("Junk at end of arguments."); | |
2778 | ||
30875e1c | 2779 | resolve_sal_pc (&sal); |
bd5635a1 | 2780 | |
30875e1c | 2781 | breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); |
bd5635a1 | 2782 | |
30875e1c SG |
2783 | old_chain = make_cleanup(delete_breakpoint, breakpoint); |
2784 | ||
bd5635a1 RP |
2785 | /* Keep within the current frame */ |
2786 | ||
2787 | if (prev_frame) | |
2788 | { | |
706dc3ce JL |
2789 | sal = find_pc_line (prev_frame->pc, 0); |
2790 | sal.pc = prev_frame->pc; | |
30875e1c SG |
2791 | breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); |
2792 | make_cleanup(delete_breakpoint, breakpoint); | |
bd5635a1 RP |
2793 | } |
2794 | ||
d7e7e851 | 2795 | proceed (-1, TARGET_SIGNAL_DEFAULT, 0); |
30875e1c | 2796 | do_cleanups(old_chain); |
bd5635a1 RP |
2797 | } |
2798 | \f | |
bdbd5f50 JG |
2799 | #if 0 |
2800 | /* These aren't used; I don't konw what they were for. */ | |
bd5635a1 RP |
2801 | /* Set a breakpoint at the catch clause for NAME. */ |
2802 | static int | |
2803 | catch_breakpoint (name) | |
2804 | char *name; | |
2805 | { | |
2806 | } | |
2807 | ||
2808 | static int | |
2809 | disable_catch_breakpoint () | |
2810 | { | |
2811 | } | |
2812 | ||
2813 | static int | |
2814 | delete_catch_breakpoint () | |
2815 | { | |
2816 | } | |
2817 | ||
2818 | static int | |
2819 | enable_catch_breakpoint () | |
2820 | { | |
2821 | } | |
bdbd5f50 | 2822 | #endif /* 0 */ |
bd5635a1 RP |
2823 | |
2824 | struct sal_chain | |
2825 | { | |
2826 | struct sal_chain *next; | |
2827 | struct symtab_and_line sal; | |
2828 | }; | |
2829 | ||
bdbd5f50 JG |
2830 | #if 0 |
2831 | /* This isn't used; I don't know what it was for. */ | |
bd5635a1 RP |
2832 | /* For each catch clause identified in ARGS, run FUNCTION |
2833 | with that clause as an argument. */ | |
2834 | static struct symtabs_and_lines | |
2835 | map_catch_names (args, function) | |
2836 | char *args; | |
2837 | int (*function)(); | |
2838 | { | |
2839 | register char *p = args; | |
2840 | register char *p1; | |
2841 | struct symtabs_and_lines sals; | |
bdbd5f50 | 2842 | #if 0 |
bd5635a1 | 2843 | struct sal_chain *sal_chain = 0; |
bdbd5f50 | 2844 | #endif |
bd5635a1 RP |
2845 | |
2846 | if (p == 0) | |
2847 | error_no_arg ("one or more catch names"); | |
2848 | ||
2849 | sals.nelts = 0; | |
2850 | sals.sals = NULL; | |
2851 | ||
2852 | while (*p) | |
2853 | { | |
2854 | p1 = p; | |
2855 | /* Don't swallow conditional part. */ | |
2856 | if (p1[0] == 'i' && p1[1] == 'f' | |
2857 | && (p1[2] == ' ' || p1[2] == '\t')) | |
2858 | break; | |
2859 | ||
2860 | if (isalpha (*p1)) | |
2861 | { | |
2862 | p1++; | |
2863 | while (isalnum (*p1) || *p1 == '_' || *p1 == '$') | |
2864 | p1++; | |
2865 | } | |
2866 | ||
2867 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
2868 | error ("Arguments must be catch names."); | |
2869 | ||
2870 | *p1 = 0; | |
2871 | #if 0 | |
2872 | if (function (p)) | |
2873 | { | |
2874 | struct sal_chain *next | |
2875 | = (struct sal_chain *)alloca (sizeof (struct sal_chain)); | |
2876 | next->next = sal_chain; | |
2877 | next->sal = get_catch_sal (p); | |
2878 | sal_chain = next; | |
2879 | goto win; | |
2880 | } | |
2881 | #endif | |
199b2450 | 2882 | printf_unfiltered ("No catch clause for exception %s.\n", p); |
bdbd5f50 | 2883 | #if 0 |
bd5635a1 | 2884 | win: |
bdbd5f50 | 2885 | #endif |
bd5635a1 RP |
2886 | p = p1; |
2887 | while (*p == ' ' || *p == '\t') p++; | |
2888 | } | |
2889 | } | |
bdbd5f50 | 2890 | #endif /* 0 */ |
bd5635a1 RP |
2891 | |
2892 | /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ | |
2893 | ||
2894 | static struct symtabs_and_lines | |
2895 | get_catch_sals (this_level_only) | |
2896 | int this_level_only; | |
2897 | { | |
bd5635a1 | 2898 | register struct blockvector *bl; |
777bef06 | 2899 | register struct block *block; |
bd5635a1 | 2900 | int index, have_default = 0; |
777bef06 | 2901 | CORE_ADDR pc; |
bd5635a1 RP |
2902 | struct symtabs_and_lines sals; |
2903 | struct sal_chain *sal_chain = 0; | |
2904 | char *blocks_searched; | |
2905 | ||
777bef06 JK |
2906 | /* Not sure whether an error message is always the correct response, |
2907 | but it's better than a core dump. */ | |
2908 | if (selected_frame == NULL) | |
2909 | error ("No selected frame."); | |
2910 | block = get_frame_block (selected_frame); | |
706dc3ce | 2911 | pc = selected_frame->pc; |
777bef06 | 2912 | |
bd5635a1 RP |
2913 | sals.nelts = 0; |
2914 | sals.sals = NULL; | |
2915 | ||
2916 | if (block == 0) | |
2917 | error ("No symbol table info available.\n"); | |
2918 | ||
2919 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); | |
2920 | blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
4ed3a9ea | 2921 | memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
bd5635a1 RP |
2922 | |
2923 | while (block != 0) | |
2924 | { | |
2925 | CORE_ADDR end = BLOCK_END (block) - 4; | |
2926 | int last_index; | |
2927 | ||
2928 | if (bl != blockvector_for_pc (end, &index)) | |
2929 | error ("blockvector blotch"); | |
2930 | if (BLOCKVECTOR_BLOCK (bl, index) != block) | |
2931 | error ("blockvector botch"); | |
2932 | last_index = BLOCKVECTOR_NBLOCKS (bl); | |
2933 | index += 1; | |
2934 | ||
2935 | /* Don't print out blocks that have gone by. */ | |
2936 | while (index < last_index | |
2937 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) | |
2938 | index++; | |
2939 | ||
2940 | while (index < last_index | |
2941 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) | |
2942 | { | |
2943 | if (blocks_searched[index] == 0) | |
2944 | { | |
2945 | struct block *b = BLOCKVECTOR_BLOCK (bl, index); | |
2946 | int nsyms; | |
2947 | register int i; | |
2948 | register struct symbol *sym; | |
2949 | ||
2950 | nsyms = BLOCK_NSYMS (b); | |
2951 | ||
2952 | for (i = 0; i < nsyms; i++) | |
2953 | { | |
2954 | sym = BLOCK_SYM (b, i); | |
2d313932 | 2955 | if (STREQ (SYMBOL_NAME (sym), "default")) |
bd5635a1 RP |
2956 | { |
2957 | if (have_default) | |
2958 | continue; | |
2959 | have_default = 1; | |
2960 | } | |
2961 | if (SYMBOL_CLASS (sym) == LOC_LABEL) | |
2962 | { | |
2963 | struct sal_chain *next = (struct sal_chain *) | |
2964 | alloca (sizeof (struct sal_chain)); | |
2965 | next->next = sal_chain; | |
2966 | next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); | |
2967 | sal_chain = next; | |
2968 | } | |
2969 | } | |
2970 | blocks_searched[index] = 1; | |
2971 | } | |
2972 | index++; | |
2973 | } | |
2974 | if (have_default) | |
2975 | break; | |
2976 | if (sal_chain && this_level_only) | |
2977 | break; | |
2978 | ||
2979 | /* After handling the function's top-level block, stop. | |
2980 | Don't continue to its superblock, the block of | |
2981 | per-file symbols. */ | |
2982 | if (BLOCK_FUNCTION (block)) | |
2983 | break; | |
2984 | block = BLOCK_SUPERBLOCK (block); | |
2985 | } | |
2986 | ||
2987 | if (sal_chain) | |
2988 | { | |
2989 | struct sal_chain *tmp_chain; | |
2990 | ||
2991 | /* Count the number of entries. */ | |
2992 | for (index = 0, tmp_chain = sal_chain; tmp_chain; | |
2993 | tmp_chain = tmp_chain->next) | |
2994 | index++; | |
2995 | ||
2996 | sals.nelts = index; | |
2997 | sals.sals = (struct symtab_and_line *) | |
2998 | xmalloc (index * sizeof (struct symtab_and_line)); | |
2999 | for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) | |
3000 | sals.sals[index] = sal_chain->sal; | |
3001 | } | |
3002 | ||
3003 | return sals; | |
3004 | } | |
3005 | ||
3006 | /* Commands to deal with catching exceptions. */ | |
3007 | ||
30875e1c | 3008 | static void |
bd5635a1 RP |
3009 | catch_command_1 (arg, tempflag, from_tty) |
3010 | char *arg; | |
3011 | int tempflag; | |
3012 | int from_tty; | |
3013 | { | |
3014 | /* First, translate ARG into something we can deal with in terms | |
3015 | of breakpoints. */ | |
3016 | ||
3017 | struct symtabs_and_lines sals; | |
3018 | struct symtab_and_line sal; | |
3019 | register struct expression *cond = 0; | |
3020 | register struct breakpoint *b; | |
3021 | char *save_arg; | |
3022 | int i; | |
bd5635a1 RP |
3023 | |
3024 | sal.line = sal.pc = sal.end = 0; | |
3025 | sal.symtab = 0; | |
3026 | ||
3027 | /* If no arg given, or if first arg is 'if ', all active catch clauses | |
3028 | are breakpointed. */ | |
3029 | ||
3030 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
3031 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
3032 | { | |
3033 | /* Grab all active catch clauses. */ | |
3034 | sals = get_catch_sals (0); | |
3035 | } | |
3036 | else | |
3037 | { | |
3038 | /* Grab selected catch clauses. */ | |
fe675038 | 3039 | error ("catch NAME not implemented"); |
bdbd5f50 JG |
3040 | #if 0 |
3041 | /* This isn't used; I don't know what it was for. */ | |
bd5635a1 | 3042 | sals = map_catch_names (arg, catch_breakpoint); |
bdbd5f50 | 3043 | #endif |
bd5635a1 RP |
3044 | } |
3045 | ||
3046 | if (! sals.nelts) | |
3047 | return; | |
3048 | ||
3049 | save_arg = arg; | |
3050 | for (i = 0; i < sals.nelts; i++) | |
3051 | { | |
30875e1c | 3052 | resolve_sal_pc (&sals.sals[i]); |
bd5635a1 RP |
3053 | |
3054 | while (arg && *arg) | |
3055 | { | |
3056 | if (arg[0] == 'i' && arg[1] == 'f' | |
3057 | && (arg[2] == ' ' || arg[2] == '\t')) | |
30875e1c SG |
3058 | cond = parse_exp_1 ((arg += 2, &arg), |
3059 | block_for_pc (sals.sals[i].pc), 0); | |
bd5635a1 RP |
3060 | else |
3061 | error ("Junk at end of arguments."); | |
3062 | } | |
3063 | arg = save_arg; | |
bd5635a1 RP |
3064 | } |
3065 | ||
3066 | for (i = 0; i < sals.nelts; i++) | |
3067 | { | |
3068 | sal = sals.sals[i]; | |
3069 | ||
3070 | if (from_tty) | |
3071 | describe_other_breakpoints (sal.pc); | |
3072 | ||
3073 | b = set_raw_breakpoint (sal); | |
30875e1c SG |
3074 | set_breakpoint_count (breakpoint_count + 1); |
3075 | b->number = breakpoint_count; | |
3076 | b->type = bp_breakpoint; | |
bd5635a1 | 3077 | b->cond = cond; |
30875e1c | 3078 | b->enable = enabled; |
e8bf33c4 | 3079 | b->disposition = tempflag ? del : donttouch; |
bd5635a1 | 3080 | |
d889f6b7 | 3081 | mention (b); |
bd5635a1 RP |
3082 | } |
3083 | ||
3084 | if (sals.nelts > 1) | |
3085 | { | |
199b2450 TL |
3086 | printf_unfiltered ("Multiple breakpoints were set.\n"); |
3087 | printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
bd5635a1 | 3088 | } |
c8950965 | 3089 | free ((PTR)sals.sals); |
bd5635a1 RP |
3090 | } |
3091 | ||
e8bf33c4 JK |
3092 | /* Used by the gui, could be made a worker for other things. */ |
3093 | ||
3094 | struct breakpoint * | |
3095 | set_breakpoint_sal (sal) | |
3096 | struct symtab_and_line sal; | |
3097 | { | |
3098 | struct breakpoint *b; | |
3099 | b = set_raw_breakpoint (sal); | |
3100 | set_breakpoint_count (breakpoint_count + 1); | |
3101 | b->number = breakpoint_count; | |
3102 | b->type = bp_breakpoint; | |
3103 | b->cond = 0; | |
3104 | b->thread = -1; | |
3105 | return b; | |
3106 | } | |
3107 | ||
bdbd5f50 JG |
3108 | #if 0 |
3109 | /* These aren't used; I don't know what they were for. */ | |
bd5635a1 RP |
3110 | /* Disable breakpoints on all catch clauses described in ARGS. */ |
3111 | static void | |
3112 | disable_catch (args) | |
3113 | char *args; | |
3114 | { | |
3115 | /* Map the disable command to catch clauses described in ARGS. */ | |
3116 | } | |
3117 | ||
3118 | /* Enable breakpoints on all catch clauses described in ARGS. */ | |
3119 | static void | |
3120 | enable_catch (args) | |
3121 | char *args; | |
3122 | { | |
3123 | /* Map the disable command to catch clauses described in ARGS. */ | |
3124 | } | |
3125 | ||
3126 | /* Delete breakpoints on all catch clauses in the active scope. */ | |
3127 | static void | |
3128 | delete_catch (args) | |
3129 | char *args; | |
3130 | { | |
3131 | /* Map the delete command to catch clauses described in ARGS. */ | |
3132 | } | |
bdbd5f50 | 3133 | #endif /* 0 */ |
bd5635a1 RP |
3134 | |
3135 | static void | |
3136 | catch_command (arg, from_tty) | |
3137 | char *arg; | |
3138 | int from_tty; | |
3139 | { | |
3140 | catch_command_1 (arg, 0, from_tty); | |
3141 | } | |
3142 | \f | |
3143 | static void | |
3144 | clear_command (arg, from_tty) | |
3145 | char *arg; | |
3146 | int from_tty; | |
3147 | { | |
3148 | register struct breakpoint *b, *b1; | |
3149 | struct symtabs_and_lines sals; | |
3150 | struct symtab_and_line sal; | |
3151 | register struct breakpoint *found; | |
3152 | int i; | |
3153 | ||
3154 | if (arg) | |
3155 | { | |
3156 | sals = decode_line_spec (arg, 1); | |
3157 | } | |
3158 | else | |
3159 | { | |
3160 | sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); | |
3161 | sal.line = default_breakpoint_line; | |
3162 | sal.symtab = default_breakpoint_symtab; | |
3163 | sal.pc = 0; | |
3164 | if (sal.symtab == 0) | |
3165 | error ("No source file specified."); | |
3166 | ||
3167 | sals.sals[0] = sal; | |
3168 | sals.nelts = 1; | |
3169 | } | |
3170 | ||
3171 | for (i = 0; i < sals.nelts; i++) | |
3172 | { | |
3173 | /* If exact pc given, clear bpts at that pc. | |
3174 | But if sal.pc is zero, clear all bpts on specified line. */ | |
3175 | sal = sals.sals[i]; | |
3176 | found = (struct breakpoint *) 0; | |
3177 | while (breakpoint_chain | |
d889f6b7 JK |
3178 | && (sal.pc |
3179 | ? breakpoint_chain->address == sal.pc | |
3180 | : (breakpoint_chain->source_file != NULL | |
3181 | && sal.symtab != NULL | |
3182 | && STREQ (breakpoint_chain->source_file, | |
3183 | sal.symtab->filename) | |
bd5635a1 RP |
3184 | && breakpoint_chain->line_number == sal.line))) |
3185 | { | |
3186 | b1 = breakpoint_chain; | |
3187 | breakpoint_chain = b1->next; | |
3188 | b1->next = found; | |
3189 | found = b1; | |
3190 | } | |
3191 | ||
3192 | ALL_BREAKPOINTS (b) | |
3193 | while (b->next | |
30875e1c | 3194 | && b->next->type != bp_watchpoint |
999dd04b | 3195 | && b->next->type != bp_hardware_watchpoint |
11054881 KH |
3196 | && b->next->type != bp_read_watchpoint |
3197 | && b->next->type != bp_access_watchpoint | |
d889f6b7 JK |
3198 | && (sal.pc |
3199 | ? b->next->address == sal.pc | |
3200 | : (b->next->source_file != NULL | |
3201 | && sal.symtab != NULL | |
3202 | && STREQ (b->next->source_file, sal.symtab->filename) | |
bd5635a1 RP |
3203 | && b->next->line_number == sal.line))) |
3204 | { | |
3205 | b1 = b->next; | |
3206 | b->next = b1->next; | |
3207 | b1->next = found; | |
3208 | found = b1; | |
3209 | } | |
3210 | ||
3211 | if (found == 0) | |
3212 | { | |
3213 | if (arg) | |
3214 | error ("No breakpoint at %s.", arg); | |
3215 | else | |
3216 | error ("No breakpoint at this line."); | |
3217 | } | |
3218 | ||
3219 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ | |
199b2450 | 3220 | if (from_tty) printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : ""); |
6c803036 | 3221 | breakpoints_changed (); |
bd5635a1 RP |
3222 | while (found) |
3223 | { | |
199b2450 | 3224 | if (from_tty) printf_unfiltered ("%d ", found->number); |
bd5635a1 RP |
3225 | b1 = found->next; |
3226 | delete_breakpoint (found); | |
3227 | found = b1; | |
3228 | } | |
199b2450 | 3229 | if (from_tty) putchar_unfiltered ('\n'); |
bd5635a1 | 3230 | } |
c8950965 | 3231 | free ((PTR)sals.sals); |
bd5635a1 RP |
3232 | } |
3233 | \f | |
3234 | /* Delete breakpoint in BS if they are `delete' breakpoints. | |
3235 | This is called after any breakpoint is hit, or after errors. */ | |
3236 | ||
3237 | void | |
3238 | breakpoint_auto_delete (bs) | |
3239 | bpstat bs; | |
3240 | { | |
3241 | for (; bs; bs = bs->next) | |
e8bf33c4 | 3242 | if (bs->breakpoint_at && bs->breakpoint_at->disposition == del |
cef4c2e7 | 3243 | && bs->stop) |
bd5635a1 RP |
3244 | delete_breakpoint (bs->breakpoint_at); |
3245 | } | |
3246 | ||
3247 | /* Delete a breakpoint and clean up all traces of it in the data structures. */ | |
3248 | ||
30875e1c | 3249 | void |
bd5635a1 RP |
3250 | delete_breakpoint (bpt) |
3251 | struct breakpoint *bpt; | |
3252 | { | |
3253 | register struct breakpoint *b; | |
3254 | register bpstat bs; | |
3255 | ||
754e5da2 SG |
3256 | if (delete_breakpoint_hook) |
3257 | delete_breakpoint_hook (bpt); | |
3258 | ||
bd5635a1 | 3259 | if (bpt->inserted) |
999dd04b JL |
3260 | remove_breakpoint (bpt); |
3261 | ||
bd5635a1 RP |
3262 | if (breakpoint_chain == bpt) |
3263 | breakpoint_chain = bpt->next; | |
3264 | ||
3265 | ALL_BREAKPOINTS (b) | |
3266 | if (b->next == bpt) | |
3267 | { | |
3268 | b->next = bpt->next; | |
3269 | break; | |
3270 | } | |
3271 | ||
3272 | check_duplicates (bpt->address); | |
fe675038 JK |
3273 | /* If this breakpoint was inserted, and there is another breakpoint |
3274 | at the same address, we need to insert the other breakpoint. */ | |
999dd04b | 3275 | if (bpt->inserted |
11054881 KH |
3276 | && bpt->type != bp_hardware_watchpoint |
3277 | && bpt->type != bp_read_watchpoint | |
3278 | && bpt->type != bp_access_watchpoint) | |
fe675038 JK |
3279 | { |
3280 | ALL_BREAKPOINTS (b) | |
ebad9e90 JK |
3281 | if (b->address == bpt->address |
3282 | && !b->duplicate | |
fa3764e2 JL |
3283 | && b->enable != disabled |
3284 | && b->enable != shlib_disabled) | |
fe675038 JK |
3285 | { |
3286 | int val; | |
3287 | val = target_insert_breakpoint (b->address, b->shadow_contents); | |
3288 | if (val != 0) | |
3289 | { | |
05052b63 | 3290 | target_terminal_ours_for_output (); |
199b2450 | 3291 | fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); |
fe675038 JK |
3292 | memory_error (val, b->address); /* which bombs us out */ |
3293 | } | |
3294 | else | |
3295 | b->inserted = 1; | |
3296 | } | |
3297 | } | |
bd5635a1 RP |
3298 | |
3299 | free_command_lines (&bpt->commands); | |
3300 | if (bpt->cond) | |
d889f6b7 | 3301 | free (bpt->cond); |
bd5635a1 | 3302 | if (bpt->cond_string != NULL) |
d889f6b7 | 3303 | free (bpt->cond_string); |
bd5635a1 | 3304 | if (bpt->addr_string != NULL) |
d889f6b7 | 3305 | free (bpt->addr_string); |
39ce6829 PS |
3306 | if (bpt->exp != NULL) |
3307 | free (bpt->exp); | |
0eaaa46a | 3308 | if (bpt->exp_string != NULL) |
d889f6b7 | 3309 | free (bpt->exp_string); |
39ce6829 PS |
3310 | if (bpt->val != NULL) |
3311 | value_free (bpt->val); | |
d889f6b7 JK |
3312 | if (bpt->source_file != NULL) |
3313 | free (bpt->source_file); | |
bd5635a1 | 3314 | |
bd5635a1 | 3315 | /* Be sure no bpstat's are pointing at it after it's been freed. */ |
05052b63 JK |
3316 | /* FIXME, how can we find all bpstat's? |
3317 | We just check stop_bpstat for now. */ | |
bd5635a1 RP |
3318 | for (bs = stop_bpstat; bs; bs = bs->next) |
3319 | if (bs->breakpoint_at == bpt) | |
3320 | bs->breakpoint_at = NULL; | |
c8950965 | 3321 | free ((PTR)bpt); |
bd5635a1 RP |
3322 | } |
3323 | ||
bd5635a1 RP |
3324 | static void |
3325 | delete_command (arg, from_tty) | |
3326 | char *arg; | |
3327 | int from_tty; | |
3328 | { | |
3329 | ||
3330 | if (arg == 0) | |
3331 | { | |
3332 | /* Ask user only if there are some breakpoints to delete. */ | |
3333 | if (!from_tty | |
e8bf33c4 | 3334 | || (breakpoint_chain && query ("Delete all breakpoints? "))) |
bd5635a1 RP |
3335 | { |
3336 | /* No arg; clear all breakpoints. */ | |
3337 | while (breakpoint_chain) | |
3338 | delete_breakpoint (breakpoint_chain); | |
3339 | } | |
3340 | } | |
3341 | else | |
3342 | map_breakpoint_numbers (arg, delete_breakpoint); | |
3343 | } | |
3344 | ||
bdbd5f50 JG |
3345 | /* Reset a breakpoint given it's struct breakpoint * BINT. |
3346 | The value we return ends up being the return value from catch_errors. | |
3347 | Unused in this case. */ | |
3348 | ||
3349 | static int | |
bd5635a1 | 3350 | breakpoint_re_set_one (bint) |
bdbd5f50 | 3351 | char *bint; |
bd5635a1 RP |
3352 | { |
3353 | struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ | |
11054881 | 3354 | struct value *mark; |
bd5635a1 RP |
3355 | int i; |
3356 | struct symtabs_and_lines sals; | |
bd5635a1 | 3357 | char *s; |
30875e1c | 3358 | enum enable save_enable; |
bd5635a1 | 3359 | |
80ba48f5 | 3360 | switch (b->type) |
bd5635a1 | 3361 | { |
80ba48f5 | 3362 | case bp_breakpoint: |
11054881 | 3363 | case bp_hardware_breakpoint: |
80ba48f5 SG |
3364 | if (b->addr_string == NULL) |
3365 | { | |
3366 | /* Anything without a string can't be re-set. */ | |
3367 | delete_breakpoint (b); | |
3368 | return 0; | |
3369 | } | |
30875e1c SG |
3370 | /* In case we have a problem, disable this breakpoint. We'll restore |
3371 | its status if we succeed. */ | |
3372 | save_enable = b->enable; | |
3373 | b->enable = disabled; | |
3374 | ||
706dc3ce JL |
3375 | set_language (b->language); |
3376 | input_radix = b->input_radix; | |
bd5635a1 | 3377 | s = b->addr_string; |
d889f6b7 | 3378 | sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0, (char ***)NULL); |
bd5635a1 RP |
3379 | for (i = 0; i < sals.nelts; i++) |
3380 | { | |
30875e1c | 3381 | resolve_sal_pc (&sals.sals[i]); |
fee933f1 RP |
3382 | |
3383 | /* Reparse conditions, they might contain references to the | |
3384 | old symtab. */ | |
3385 | if (b->cond_string != NULL) | |
3386 | { | |
3387 | s = b->cond_string; | |
3388 | if (b->cond) | |
3389 | free ((PTR)b->cond); | |
3390 | b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); | |
3391 | } | |
3392 | ||
3393 | /* We need to re-set the breakpoint if the address changes...*/ | |
d889f6b7 | 3394 | if (b->address != sals.sals[i].pc |
fee933f1 RP |
3395 | /* ...or new and old breakpoints both have source files, and |
3396 | the source file name or the line number changes... */ | |
d889f6b7 JK |
3397 | || (b->source_file != NULL |
3398 | && sals.sals[i].symtab != NULL | |
3399 | && (!STREQ (b->source_file, sals.sals[i].symtab->filename) | |
3400 | || b->line_number != sals.sals[i].line) | |
fee933f1 RP |
3401 | ) |
3402 | /* ...or we switch between having a source file and not having | |
3403 | one. */ | |
3404 | || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL)) | |
3405 | ) | |
bd5635a1 | 3406 | { |
d889f6b7 JK |
3407 | if (b->source_file != NULL) |
3408 | free (b->source_file); | |
3409 | if (sals.sals[i].symtab == NULL) | |
3410 | b->source_file = NULL; | |
3411 | else | |
3412 | b->source_file = | |
3413 | savestring (sals.sals[i].symtab->filename, | |
3414 | strlen (sals.sals[i].symtab->filename)); | |
8537ba60 SG |
3415 | b->line_number = sals.sals[i].line; |
3416 | b->address = sals.sals[i].pc; | |
bd5635a1 | 3417 | |
8537ba60 | 3418 | check_duplicates (b->address); |
bd5635a1 | 3419 | |
8537ba60 | 3420 | mention (b); |
6c803036 JK |
3421 | |
3422 | /* Might be better to do this just once per breakpoint_re_set, | |
3423 | rather than once for every breakpoint. */ | |
3424 | breakpoints_changed (); | |
8537ba60 | 3425 | } |
30875e1c | 3426 | b->enable = save_enable; /* Restore it, this worked. */ |
bd5635a1 | 3427 | } |
c8950965 | 3428 | free ((PTR)sals.sals); |
80ba48f5 | 3429 | break; |
2d313932 | 3430 | |
80ba48f5 | 3431 | case bp_watchpoint: |
999dd04b | 3432 | case bp_hardware_watchpoint: |
11054881 KH |
3433 | case bp_read_watchpoint: |
3434 | case bp_access_watchpoint: | |
0eaaa46a | 3435 | innermost_block = NULL; |
0a97f6c4 JK |
3436 | /* The issue arises of what context to evaluate this in. The same |
3437 | one as when it was set, but what does that mean when symbols have | |
3438 | been re-read? We could save the filename and functionname, but | |
3439 | if the context is more local than that, the best we could do would | |
3440 | be something like how many levels deep and which index at that | |
3441 | particular level, but that's going to be less stable than filenames | |
3442 | or functionnames. */ | |
3443 | /* So for now, just use a global context. */ | |
39ce6829 PS |
3444 | if (b->exp) |
3445 | free ((PTR)b->exp); | |
0eaaa46a JK |
3446 | b->exp = parse_expression (b->exp_string); |
3447 | b->exp_valid_block = innermost_block; | |
11054881 | 3448 | mark = value_mark (); |
39ce6829 PS |
3449 | if (b->val) |
3450 | value_free (b->val); | |
0eaaa46a JK |
3451 | b->val = evaluate_expression (b->exp); |
3452 | release_value (b->val); | |
3453 | if (VALUE_LAZY (b->val)) | |
3454 | value_fetch_lazy (b->val); | |
3455 | ||
2d313932 JK |
3456 | if (b->cond_string != NULL) |
3457 | { | |
3458 | s = b->cond_string; | |
39ce6829 PS |
3459 | if (b->cond) |
3460 | free ((PTR)b->cond); | |
2d313932 JK |
3461 | b->cond = parse_exp_1 (&s, (struct block *)0, 0); |
3462 | } | |
cabd4da6 JK |
3463 | if (b->enable == enabled) |
3464 | mention (b); | |
11054881 | 3465 | value_free_to_mark (mark); |
80ba48f5 | 3466 | break; |
2d313932 | 3467 | |
80ba48f5 SG |
3468 | default: |
3469 | printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); | |
2d313932 | 3470 | /* fall through */ |
fa3764e2 JL |
3471 | /* Delete longjmp breakpoints, they will be reset later by |
3472 | breakpoint_re_set. */ | |
80ba48f5 SG |
3473 | case bp_longjmp: |
3474 | case bp_longjmp_resume: | |
3475 | delete_breakpoint (b); | |
3476 | break; | |
27b6a1fa JL |
3477 | |
3478 | /* This breakpoint is special, it's set up when the inferior | |
3479 | starts and we really don't want to touch it. */ | |
3480 | case bp_shlib_event: | |
fa3764e2 JL |
3481 | |
3482 | /* Keep temporary breakpoints, which can be encountered when we step | |
3483 | over a dlopen call and SOLIB_ADD is resetting the breakpoints. | |
3484 | Otherwise these should have been blown away via the cleanup chain | |
3485 | or by breakpoint_init_inferior when we rerun the executable. */ | |
3486 | case bp_until: | |
3487 | case bp_finish: | |
3488 | case bp_watchpoint_scope: | |
3489 | case bp_call_dummy: | |
3490 | case bp_step_resume: | |
27b6a1fa | 3491 | break; |
bd5635a1 | 3492 | } |
80ba48f5 | 3493 | |
bdbd5f50 | 3494 | return 0; |
bd5635a1 RP |
3495 | } |
3496 | ||
3497 | /* Re-set all breakpoints after symbols have been re-loaded. */ | |
3498 | void | |
3499 | breakpoint_re_set () | |
3500 | { | |
cba0d141 | 3501 | struct breakpoint *b, *temp; |
706dc3ce JL |
3502 | enum language save_language; |
3503 | int save_input_radix; | |
30875e1c SG |
3504 | static char message1[] = "Error in re-setting breakpoint %d:\n"; |
3505 | char message[sizeof (message1) + 30 /* slop */]; | |
bd5635a1 | 3506 | |
706dc3ce JL |
3507 | save_language = current_language->la_language; |
3508 | save_input_radix = input_radix; | |
cba0d141 | 3509 | ALL_BREAKPOINTS_SAFE (b, temp) |
bd5635a1 | 3510 | { |
2d313932 | 3511 | sprintf (message, message1, b->number); /* Format possible error msg */ |
fe675038 JK |
3512 | catch_errors (breakpoint_re_set_one, (char *) b, message, |
3513 | RETURN_MASK_ALL); | |
bd5635a1 | 3514 | } |
706dc3ce JL |
3515 | set_language (save_language); |
3516 | input_radix = save_input_radix; | |
bd5635a1 | 3517 | |
cd10c7e3 SG |
3518 | #ifdef GET_LONGJMP_TARGET |
3519 | create_longjmp_breakpoint ("longjmp"); | |
3520 | create_longjmp_breakpoint ("_longjmp"); | |
3521 | create_longjmp_breakpoint ("siglongjmp"); | |
3522 | create_longjmp_breakpoint (NULL); | |
3523 | #endif | |
80ba48f5 | 3524 | |
1eeba686 | 3525 | #if 0 |
0fe1522a | 3526 | /* Took this out (temporarily at least), since it produces an extra |
1eeba686 | 3527 | blank line at startup. This messes up the gdbtests. -PB */ |
bd5635a1 RP |
3528 | /* Blank line to finish off all those mention() messages we just printed. */ |
3529 | printf_filtered ("\n"); | |
1eeba686 | 3530 | #endif |
bd5635a1 RP |
3531 | } |
3532 | \f | |
3533 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |
3534 | If from_tty is nonzero, it prints a message to that effect, | |
3535 | which ends with a period (no newline). */ | |
3536 | ||
3537 | void | |
3538 | set_ignore_count (bptnum, count, from_tty) | |
3539 | int bptnum, count, from_tty; | |
3540 | { | |
3541 | register struct breakpoint *b; | |
3542 | ||
3543 | if (count < 0) | |
3544 | count = 0; | |
3545 | ||
3546 | ALL_BREAKPOINTS (b) | |
3547 | if (b->number == bptnum) | |
3548 | { | |
3549 | b->ignore_count = count; | |
3550 | if (!from_tty) | |
3551 | return; | |
3552 | else if (count == 0) | |
423e9664 SG |
3553 | printf_filtered ("Will stop next time breakpoint %d is reached.", |
3554 | bptnum); | |
bd5635a1 | 3555 | else if (count == 1) |
423e9664 SG |
3556 | printf_filtered ("Will ignore next crossing of breakpoint %d.", |
3557 | bptnum); | |
bd5635a1 | 3558 | else |
423e9664 | 3559 | printf_filtered ("Will ignore next %d crossings of breakpoint %d.", |
bd5635a1 | 3560 | count, bptnum); |
6c803036 | 3561 | breakpoints_changed (); |
bd5635a1 RP |
3562 | return; |
3563 | } | |
3564 | ||
3565 | error ("No breakpoint number %d.", bptnum); | |
3566 | } | |
3567 | ||
3568 | /* Clear the ignore counts of all breakpoints. */ | |
3569 | void | |
3570 | breakpoint_clear_ignore_counts () | |
3571 | { | |
3572 | struct breakpoint *b; | |
3573 | ||
3574 | ALL_BREAKPOINTS (b) | |
3575 | b->ignore_count = 0; | |
3576 | } | |
3577 | ||
3578 | /* Command to set ignore-count of breakpoint N to COUNT. */ | |
3579 | ||
3580 | static void | |
3581 | ignore_command (args, from_tty) | |
3582 | char *args; | |
3583 | int from_tty; | |
3584 | { | |
3585 | char *p = args; | |
3586 | register int num; | |
3587 | ||
3588 | if (p == 0) | |
3589 | error_no_arg ("a breakpoint number"); | |
3590 | ||
3591 | num = get_number (&p); | |
3592 | ||
3593 | if (*p == 0) | |
3594 | error ("Second argument (specified ignore-count) is missing."); | |
3595 | ||
bdbd5f50 JG |
3596 | set_ignore_count (num, |
3597 | longest_to_int (value_as_long (parse_and_eval (p))), | |
3598 | from_tty); | |
423e9664 | 3599 | printf_filtered ("\n"); |
6c803036 | 3600 | breakpoints_changed (); |
bd5635a1 RP |
3601 | } |
3602 | \f | |
3603 | /* Call FUNCTION on each of the breakpoints | |
3604 | whose numbers are given in ARGS. */ | |
3605 | ||
3606 | static void | |
3607 | map_breakpoint_numbers (args, function) | |
3608 | char *args; | |
30875e1c | 3609 | void (*function) PARAMS ((struct breakpoint *)); |
bd5635a1 RP |
3610 | { |
3611 | register char *p = args; | |
3612 | char *p1; | |
3613 | register int num; | |
3614 | register struct breakpoint *b; | |
3615 | ||
3616 | if (p == 0) | |
3617 | error_no_arg ("one or more breakpoint numbers"); | |
3618 | ||
3619 | while (*p) | |
3620 | { | |
3621 | p1 = p; | |
3622 | ||
3623 | num = get_number (&p1); | |
3624 | ||
3625 | ALL_BREAKPOINTS (b) | |
3626 | if (b->number == num) | |
3627 | { | |
999dd04b | 3628 | struct breakpoint *related_breakpoint = b->related_breakpoint; |
bd5635a1 | 3629 | function (b); |
999dd04b JL |
3630 | if (related_breakpoint) |
3631 | function (related_breakpoint); | |
bd5635a1 RP |
3632 | goto win; |
3633 | } | |
199b2450 | 3634 | printf_unfiltered ("No breakpoint number %d.\n", num); |
bd5635a1 RP |
3635 | win: |
3636 | p = p1; | |
3637 | } | |
3638 | } | |
3639 | ||
e8bf33c4 | 3640 | void |
bd5635a1 RP |
3641 | enable_breakpoint (bpt) |
3642 | struct breakpoint *bpt; | |
3643 | { | |
706dc3ce | 3644 | struct frame_info *save_selected_frame = NULL; |
fa99ebe1 | 3645 | int save_selected_frame_level = -1; |
11054881 KH |
3646 | int target_resources_ok, other_type_used; |
3647 | struct value *mark; | |
fa99ebe1 | 3648 | |
11054881 KH |
3649 | if (bpt->type == bp_hardware_breakpoint) |
3650 | { | |
3651 | int i; | |
3652 | i = hw_breakpoint_used_count(); | |
3653 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT( | |
3654 | bp_hardware_breakpoint, i+1, 0); | |
3655 | if (target_resources_ok == 0) | |
3656 | error ("No hardware breakpoint support in the target."); | |
3657 | else if (target_resources_ok < 0) | |
3658 | error ("Hardware breakpoints used exceeds limit."); | |
3659 | } | |
bd5635a1 | 3660 | bpt->enable = enabled; |
bd5635a1 | 3661 | check_duplicates (bpt->address); |
11054881 KH |
3662 | |
3663 | if (bpt->type == bp_watchpoint || bpt->type == bp_hardware_watchpoint || | |
3664 | bpt->type == bp_read_watchpoint || bpt->type == bp_access_watchpoint) | |
bd5635a1 | 3665 | { |
fa99ebe1 | 3666 | if (bpt->exp_valid_block != NULL) |
f266e564 | 3667 | { |
706dc3ce JL |
3668 | struct frame_info *fr = |
3669 | find_frame_addr_in_frame_chain (bpt->watchpoint_frame); | |
fa99ebe1 JK |
3670 | if (fr == NULL) |
3671 | { | |
3672 | printf_filtered ("\ | |
f266e564 JK |
3673 | Cannot enable watchpoint %d because the block in which its expression\n\ |
3674 | is valid is not currently in scope.\n", bpt->number); | |
fa99ebe1 JK |
3675 | bpt->enable = disabled; |
3676 | return; | |
3677 | } | |
999dd04b | 3678 | |
fa99ebe1 JK |
3679 | save_selected_frame = selected_frame; |
3680 | save_selected_frame_level = selected_frame_level; | |
3681 | select_frame (fr, -1); | |
f266e564 JK |
3682 | } |
3683 | ||
bd5635a1 | 3684 | value_free (bpt->val); |
11054881 | 3685 | mark = value_mark (); |
bd5635a1 RP |
3686 | bpt->val = evaluate_expression (bpt->exp); |
3687 | release_value (bpt->val); | |
2d313932 JK |
3688 | if (VALUE_LAZY (bpt->val)) |
3689 | value_fetch_lazy (bpt->val); | |
fa99ebe1 | 3690 | |
11054881 KH |
3691 | if (bpt->type == bp_hardware_watchpoint || |
3692 | bpt->type == bp_read_watchpoint || | |
3693 | bpt->type == bp_access_watchpoint) | |
3694 | { | |
3695 | int i = hw_watchpoint_used_count (bpt->type, &other_type_used); | |
557f3a0e SS |
3696 | int mem_cnt = can_use_hardware_watchpoint (bpt->val); |
3697 | ||
11054881 | 3698 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT( |
557f3a0e | 3699 | bpt->type, i + mem_cnt, other_type_used); |
11054881 KH |
3700 | /* we can consider of type is bp_hardware_watchpoint, convert to |
3701 | bp_watchpoint in the following condition */ | |
3702 | if (target_resources_ok < 0) | |
3703 | { | |
3704 | printf_filtered("\ | |
3705 | Cannot enable watchpoint %d because target watch resources\n\ | |
3706 | have been allocated for other watchpoints.\n", bpt->number); | |
3707 | bpt->enable = disabled; | |
3708 | value_free_to_mark (mark); | |
3709 | return; | |
3710 | } | |
3711 | } | |
3712 | ||
fa99ebe1 JK |
3713 | if (save_selected_frame_level >= 0) |
3714 | select_frame (save_selected_frame, save_selected_frame_level); | |
11054881 | 3715 | value_free_to_mark (mark); |
bd5635a1 | 3716 | } |
e8bf33c4 JK |
3717 | |
3718 | if (modify_breakpoint_hook) | |
3719 | modify_breakpoint_hook (bpt); | |
bd5635a1 RP |
3720 | } |
3721 | ||
bdbd5f50 | 3722 | /* ARGSUSED */ |
bd5635a1 RP |
3723 | static void |
3724 | enable_command (args, from_tty) | |
3725 | char *args; | |
3726 | int from_tty; | |
3727 | { | |
3728 | struct breakpoint *bpt; | |
3729 | if (args == 0) | |
3730 | ALL_BREAKPOINTS (bpt) | |
423e9664 SG |
3731 | switch (bpt->type) |
3732 | { | |
3733 | case bp_breakpoint: | |
11054881 | 3734 | case bp_hardware_breakpoint: |
423e9664 | 3735 | case bp_watchpoint: |
999dd04b | 3736 | case bp_hardware_watchpoint: |
11054881 KH |
3737 | case bp_read_watchpoint: |
3738 | case bp_access_watchpoint: | |
423e9664 SG |
3739 | enable_breakpoint (bpt); |
3740 | default: | |
3741 | continue; | |
3742 | } | |
bd5635a1 RP |
3743 | else |
3744 | map_breakpoint_numbers (args, enable_breakpoint); | |
3745 | } | |
3746 | ||
e8bf33c4 | 3747 | void |
bd5635a1 RP |
3748 | disable_breakpoint (bpt) |
3749 | struct breakpoint *bpt; | |
3750 | { | |
999dd04b JL |
3751 | /* Never disable a watchpoint scope breakpoint; we want to |
3752 | hit them when we leave scope so we can delete both the | |
3753 | watchpoint and its scope breakpoint at that time. */ | |
3754 | if (bpt->type == bp_watchpoint_scope) | |
3755 | return; | |
3756 | ||
bd5635a1 RP |
3757 | bpt->enable = disabled; |
3758 | ||
bd5635a1 | 3759 | check_duplicates (bpt->address); |
e8bf33c4 JK |
3760 | |
3761 | if (modify_breakpoint_hook) | |
3762 | modify_breakpoint_hook (bpt); | |
bd5635a1 RP |
3763 | } |
3764 | ||
bdbd5f50 | 3765 | /* ARGSUSED */ |
bd5635a1 RP |
3766 | static void |
3767 | disable_command (args, from_tty) | |
3768 | char *args; | |
3769 | int from_tty; | |
3770 | { | |
3771 | register struct breakpoint *bpt; | |
3772 | if (args == 0) | |
3773 | ALL_BREAKPOINTS (bpt) | |
423e9664 SG |
3774 | switch (bpt->type) |
3775 | { | |
3776 | case bp_breakpoint: | |
11054881 KH |
3777 | case bp_hardware_breakpoint: |
3778 | case bp_watchpoint: | |
3779 | case bp_hardware_watchpoint: | |
3780 | case bp_read_watchpoint: | |
3781 | case bp_access_watchpoint: | |
423e9664 SG |
3782 | disable_breakpoint (bpt); |
3783 | default: | |
3784 | continue; | |
3785 | } | |
bd5635a1 RP |
3786 | else |
3787 | map_breakpoint_numbers (args, disable_breakpoint); | |
3788 | } | |
3789 | ||
3790 | static void | |
3791 | enable_once_breakpoint (bpt) | |
3792 | struct breakpoint *bpt; | |
3793 | { | |
706dc3ce | 3794 | struct frame_info *save_selected_frame = NULL; |
11054881 KH |
3795 | int save_selected_frame_level = -1; |
3796 | int target_resources_ok, other_type_used; | |
3797 | struct value *mark; | |
3798 | ||
3799 | if (bpt->type == bp_hardware_breakpoint) | |
3800 | { | |
3801 | int i; | |
3802 | i = hw_breakpoint_used_count(); | |
3803 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT( | |
3804 | bp_hardware_breakpoint, i+1, 0); | |
3805 | if (target_resources_ok == 0) | |
3806 | error ("No hardware breakpoint support in the target."); | |
3807 | else if (target_resources_ok < 0) | |
3808 | error ("Hardware breakpoints used exceeds limit."); | |
3809 | } | |
3810 | ||
30875e1c SG |
3811 | bpt->enable = enabled; |
3812 | bpt->disposition = disable; | |
bd5635a1 | 3813 | check_duplicates (bpt->address); |
6c803036 | 3814 | breakpoints_changed (); |
11054881 KH |
3815 | |
3816 | if (bpt->type == bp_watchpoint || bpt->type == bp_hardware_watchpoint || | |
3817 | bpt->type == bp_read_watchpoint || bpt->type == bp_access_watchpoint) | |
3818 | { | |
3819 | if (bpt->exp_valid_block != NULL) | |
3820 | { | |
706dc3ce JL |
3821 | struct frame_info *fr = |
3822 | find_frame_addr_in_frame_chain (bpt->watchpoint_frame); | |
11054881 KH |
3823 | if (fr == NULL) |
3824 | { | |
3825 | printf_filtered ("\ | |
3826 | Cannot enable watchpoint %d because the block in which its expression\n\ | |
3827 | is valid is not currently in scope.\n", bpt->number); | |
3828 | bpt->enable = disabled; | |
3829 | return; | |
3830 | } | |
3831 | ||
3832 | save_selected_frame = selected_frame; | |
3833 | save_selected_frame_level = selected_frame_level; | |
3834 | select_frame (fr, -1); | |
3835 | } | |
3836 | ||
3837 | value_free (bpt->val); | |
3838 | mark = value_mark (); | |
3839 | bpt->val = evaluate_expression (bpt->exp); | |
3840 | release_value (bpt->val); | |
3841 | if (VALUE_LAZY (bpt->val)) | |
3842 | value_fetch_lazy (bpt->val); | |
3843 | ||
3844 | if (bpt->type == bp_hardware_watchpoint || | |
3845 | bpt->type == bp_read_watchpoint || | |
3846 | bpt->type == bp_access_watchpoint) | |
3847 | { | |
3848 | int i = hw_watchpoint_used_count (bpt->type, &other_type_used); | |
3849 | int mem_cnt = can_use_hardware_watchpoint(bpt->val); | |
3850 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT( | |
3851 | bpt->type, i+mem_cnt, other_type_used); | |
3852 | /* we can consider of type is bp_hardware_watchpoint, convert to | |
3853 | bp_watchpoint in the following condition */ | |
3854 | if (target_resources_ok < 0) | |
3855 | { | |
3856 | printf_filtered("\ | |
3857 | Cannot enable watchpoint %d because target watch resources\n\ | |
3858 | have been allocated for other watchpoints.\n", bpt->number); | |
3859 | bpt->enable = disabled; | |
3860 | value_free_to_mark (mark); | |
3861 | } | |
3862 | } | |
3863 | ||
3864 | if (save_selected_frame_level >= 0) | |
3865 | select_frame (save_selected_frame, save_selected_frame_level); | |
3866 | value_free_to_mark (mark); | |
3867 | } | |
bd5635a1 RP |
3868 | } |
3869 | ||
bdbd5f50 | 3870 | /* ARGSUSED */ |
bd5635a1 RP |
3871 | static void |
3872 | enable_once_command (args, from_tty) | |
3873 | char *args; | |
3874 | int from_tty; | |
3875 | { | |
3876 | map_breakpoint_numbers (args, enable_once_breakpoint); | |
3877 | } | |
3878 | ||
3879 | static void | |
3880 | enable_delete_breakpoint (bpt) | |
3881 | struct breakpoint *bpt; | |
3882 | { | |
30875e1c | 3883 | bpt->enable = enabled; |
e8bf33c4 | 3884 | bpt->disposition = del; |
bd5635a1 RP |
3885 | |
3886 | check_duplicates (bpt->address); | |
6c803036 | 3887 | breakpoints_changed (); |
bd5635a1 RP |
3888 | } |
3889 | ||
bdbd5f50 | 3890 | /* ARGSUSED */ |
bd5635a1 RP |
3891 | static void |
3892 | enable_delete_command (args, from_tty) | |
3893 | char *args; | |
3894 | int from_tty; | |
3895 | { | |
3896 | map_breakpoint_numbers (args, enable_delete_breakpoint); | |
3897 | } | |
3898 | \f | |
706dc3ce JL |
3899 | /* Use default_breakpoint_'s, or nothing if they aren't valid. */ |
3900 | ||
bd5635a1 RP |
3901 | struct symtabs_and_lines |
3902 | decode_line_spec_1 (string, funfirstline) | |
3903 | char *string; | |
3904 | int funfirstline; | |
3905 | { | |
3906 | struct symtabs_and_lines sals; | |
3907 | if (string == 0) | |
3908 | error ("Empty line specification."); | |
3909 | if (default_breakpoint_valid) | |
3910 | sals = decode_line_1 (&string, funfirstline, | |
d889f6b7 JK |
3911 | default_breakpoint_symtab, default_breakpoint_line, |
3912 | (char ***)NULL); | |
bd5635a1 | 3913 | else |
d889f6b7 JK |
3914 | sals = decode_line_1 (&string, funfirstline, |
3915 | (struct symtab *)NULL, 0, (char ***)NULL); | |
bd5635a1 RP |
3916 | if (*string) |
3917 | error ("Junk at end of line specification: %s", string); | |
3918 | return sals; | |
3919 | } | |
3920 | \f | |
bd5635a1 RP |
3921 | void |
3922 | _initialize_breakpoint () | |
3923 | { | |
3924 | breakpoint_chain = 0; | |
3925 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful | |
3926 | before a breakpoint is set. */ | |
3927 | breakpoint_count = 0; | |
3928 | ||
3929 | add_com ("ignore", class_breakpoint, ignore_command, | |
557f3a0e SS |
3930 | "Set ignore-count of breakpoint number N to COUNT.\n\ |
3931 | Usage is `ignore N COUNT'."); | |
bd5635a1 RP |
3932 | |
3933 | add_com ("commands", class_breakpoint, commands_command, | |
3934 | "Set commands to be executed when a breakpoint is hit.\n\ | |
3935 | Give breakpoint number as argument after \"commands\".\n\ | |
3936 | With no argument, the targeted breakpoint is the last one set.\n\ | |
3937 | The commands themselves follow starting on the next line.\n\ | |
3938 | Type a line containing \"end\" to indicate the end of them.\n\ | |
3939 | Give \"silent\" as the first line to make the breakpoint silent;\n\ | |
3940 | then no output is printed when it is hit, except what the commands print."); | |
3941 | ||
3942 | add_com ("condition", class_breakpoint, condition_command, | |
3943 | "Specify breakpoint number N to break only if COND is true.\n\ | |
557f3a0e SS |
3944 | Usage is `condition N COND', where N is an integer and COND is an\n\ |
3945 | expression to be evaluated whenever breakpoint N is reached. "); | |
bd5635a1 RP |
3946 | |
3947 | add_com ("tbreak", class_breakpoint, tbreak_command, | |
3948 | "Set a temporary breakpoint. Args like \"break\" command.\n\ | |
c4de6b30 JK |
3949 | Like \"break\" except the breakpoint is only temporary,\n\ |
3950 | so it will be deleted when hit. Equivalent to \"break\" followed\n\ | |
3951 | by using \"enable delete\" on the breakpoint number."); | |
bd5635a1 | 3952 | |
11054881 KH |
3953 | add_com ("hbreak", class_breakpoint, hbreak_command, |
3954 | "Set a hardware assisted breakpoint. Args like \"break\" command.\n\ | |
3955 | Like \"break\" except the breakpoint requires hardware support,\n\ | |
3956 | some target hardware may not have this support."); | |
3957 | ||
3958 | add_com ("thbreak", class_breakpoint, thbreak_command, | |
3959 | "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\ | |
3960 | Like \"hbreak\" except the breakpoint is only temporary,\n\ | |
3961 | so it will be deleted when hit."); | |
3962 | ||
bd5635a1 RP |
3963 | add_prefix_cmd ("enable", class_breakpoint, enable_command, |
3964 | "Enable some breakpoints.\n\ | |
3965 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
3966 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
3967 | This is used to cancel the effect of the \"disable\" command.\n\ | |
3968 | With a subcommand you can enable temporarily.", | |
3969 | &enablelist, "enable ", 1, &cmdlist); | |
3970 | ||
3971 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, | |
3972 | "Enable some breakpoints.\n\ | |
3973 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
3974 | This is used to cancel the effect of the \"disable\" command.\n\ | |
3975 | May be abbreviated to simply \"enable\".\n", | |
3976 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); | |
3977 | ||
3978 | add_cmd ("once", no_class, enable_once_command, | |
3979 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
bd2f0c85 | 3980 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.", |
bd5635a1 RP |
3981 | &enablebreaklist); |
3982 | ||
3983 | add_cmd ("delete", no_class, enable_delete_command, | |
3984 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
3985 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
3986 | &enablebreaklist); | |
3987 | ||
3988 | add_cmd ("delete", no_class, enable_delete_command, | |
3989 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
3990 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
3991 | &enablelist); | |
3992 | ||
3993 | add_cmd ("once", no_class, enable_once_command, | |
3994 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
bd2f0c85 | 3995 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.", |
bd5635a1 RP |
3996 | &enablelist); |
3997 | ||
3998 | add_prefix_cmd ("disable", class_breakpoint, disable_command, | |
3999 | "Disable some breakpoints.\n\ | |
4000 | Arguments are breakpoint numbers with spaces in between.\n\ | |
4001 | To disable all breakpoints, give no argument.\n\ | |
4002 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", | |
4003 | &disablelist, "disable ", 1, &cmdlist); | |
4004 | add_com_alias ("dis", "disable", class_breakpoint, 1); | |
4005 | add_com_alias ("disa", "disable", class_breakpoint, 1); | |
4006 | ||
4007 | add_cmd ("breakpoints", class_alias, disable_command, | |
4008 | "Disable some breakpoints.\n\ | |
4009 | Arguments are breakpoint numbers with spaces in between.\n\ | |
4010 | To disable all breakpoints, give no argument.\n\ | |
4011 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |
4012 | This command may be abbreviated \"disable\".", | |
4013 | &disablelist); | |
4014 | ||
4015 | add_prefix_cmd ("delete", class_breakpoint, delete_command, | |
4016 | "Delete some breakpoints or auto-display expressions.\n\ | |
4017 | Arguments are breakpoint numbers with spaces in between.\n\ | |
4018 | To delete all breakpoints, give no argument.\n\ | |
4019 | \n\ | |
4020 | Also a prefix command for deletion of other GDB objects.\n\ | |
4021 | The \"unset\" command is also an alias for \"delete\".", | |
4022 | &deletelist, "delete ", 1, &cmdlist); | |
4023 | add_com_alias ("d", "delete", class_breakpoint, 1); | |
bd5635a1 RP |
4024 | |
4025 | add_cmd ("breakpoints", class_alias, delete_command, | |
4026 | "Delete some breakpoints or auto-display expressions.\n\ | |
4027 | Arguments are breakpoint numbers with spaces in between.\n\ | |
4028 | To delete all breakpoints, give no argument.\n\ | |
4029 | This command may be abbreviated \"delete\".", | |
4030 | &deletelist); | |
4031 | ||
4032 | add_com ("clear", class_breakpoint, clear_command, | |
706dc3ce | 4033 | concat ("Clear breakpoint at specified line or function.\n\ |
bd5635a1 RP |
4034 | Argument may be line number, function name, or \"*\" and an address.\n\ |
4035 | If line number is specified, all breakpoints in that line are cleared.\n\ | |
4036 | If function is specified, breakpoints at beginning of function are cleared.\n\ | |
706dc3ce JL |
4037 | If an address is specified, breakpoints at that address are cleared.\n\n", |
4038 | "With no argument, clears all breakpoints in the line that the selected frame\n\ | |
bd5635a1 RP |
4039 | is executing in.\n\ |
4040 | \n\ | |
706dc3ce | 4041 | See also the \"delete\" command which clears breakpoints by number.", NULL)); |
bd5635a1 RP |
4042 | |
4043 | add_com ("break", class_breakpoint, break_command, | |
706dc3ce | 4044 | concat ("Set breakpoint at specified line or function.\n\ |
bd5635a1 RP |
4045 | Argument may be line number, function name, or \"*\" and an address.\n\ |
4046 | If line number is specified, break at start of code for that line.\n\ | |
4047 | If function is specified, break at start of code for that function.\n\ | |
706dc3ce JL |
4048 | If an address is specified, break at that exact address.\n", |
4049 | "With no arg, uses current execution address of selected stack frame.\n\ | |
bd5635a1 RP |
4050 | This is useful for breaking on return to a stack frame.\n\ |
4051 | \n\ | |
4052 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
4053 | \n\ | |
706dc3ce | 4054 | Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL)); |
bd5635a1 RP |
4055 | add_com_alias ("b", "break", class_run, 1); |
4056 | add_com_alias ("br", "break", class_run, 1); | |
4057 | add_com_alias ("bre", "break", class_run, 1); | |
4058 | add_com_alias ("brea", "break", class_run, 1); | |
4059 | ||
4060 | add_info ("breakpoints", breakpoints_info, | |
706dc3ce | 4061 | concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
80ba48f5 | 4062 | The \"Type\" column indicates one of:\n\ |
423e9664 SG |
4063 | \tbreakpoint - normal breakpoint\n\ |
4064 | \twatchpoint - watchpoint\n\ | |
80ba48f5 SG |
4065 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
4066 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
4067 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
706dc3ce JL |
4068 | address and file/line number respectively.\n\n", |
4069 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
80ba48f5 SG |
4070 | are set to the address of the last breakpoint listed.\n\n\ |
4071 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
706dc3ce | 4072 | breakpoint set.", NULL)); |
80ba48f5 | 4073 | |
9b280a7f JG |
4074 | #if MAINTENANCE_CMDS |
4075 | ||
4076 | add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, | |
706dc3ce | 4077 | concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\ |
80ba48f5 | 4078 | The \"Type\" column indicates one of:\n\ |
423e9664 SG |
4079 | \tbreakpoint - normal breakpoint\n\ |
4080 | \twatchpoint - watchpoint\n\ | |
4081 | \tlongjmp - internal breakpoint used to step through longjmp()\n\ | |
4082 | \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ | |
4083 | \tuntil - internal breakpoint used by the \"until\" command\n\ | |
706dc3ce JL |
4084 | \tfinish - internal breakpoint used by the \"finish\" command\n", |
4085 | "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |
80ba48f5 SG |
4086 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
4087 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
706dc3ce JL |
4088 | address and file/line number respectively.\n\n", |
4089 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
bd5635a1 RP |
4090 | are set to the address of the last breakpoint listed.\n\n\ |
4091 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
706dc3ce | 4092 | breakpoint set.", NULL), |
9b280a7f JG |
4093 | &maintenanceinfolist); |
4094 | ||
4095 | #endif /* MAINTENANCE_CMDS */ | |
bd5635a1 RP |
4096 | |
4097 | add_com ("catch", class_breakpoint, catch_command, | |
4098 | "Set breakpoints to catch exceptions that are raised.\n\ | |
4099 | Argument may be a single exception to catch, multiple exceptions\n\ | |
4100 | to catch, or the default exception \"default\". If no arguments\n\ | |
4101 | are given, breakpoints are set at all exception handlers catch clauses\n\ | |
4102 | within the current scope.\n\ | |
4103 | \n\ | |
4104 | A condition specified for the catch applies to all breakpoints set\n\ | |
4105 | with this command\n\ | |
4106 | \n\ | |
4107 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
4108 | ||
4109 | add_com ("watch", class_breakpoint, watch_command, | |
4110 | "Set a watchpoint for an expression.\n\ | |
4111 | A watchpoint stops execution of your program whenever the value of\n\ | |
4112 | an expression changes."); | |
4113 | ||
11054881 KH |
4114 | add_com ("rwatch", class_breakpoint, rwatch_command, |
4115 | "Set a read watchpoint for an expression.\n\ | |
4116 | A watchpoint stops execution of your program whenever the value of\n\ | |
4117 | an expression is read."); | |
4118 | ||
4119 | add_com ("awatch", class_breakpoint, awatch_command, | |
4120 | "Set a watchpoint for an expression.\n\ | |
4121 | A watchpoint stops execution of your program whenever the value of\n\ | |
4122 | an expression is either read or written."); | |
4123 | ||
c8950965 JG |
4124 | add_info ("watchpoints", breakpoints_info, |
4125 | "Synonym for ``info breakpoints''."); | |
9f577285 | 4126 | |
bd5635a1 | 4127 | } |