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c906108c SS |
1 | /* Everything about breakpoints, for GDB. |
2 | Copyright 1986, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
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 | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "defs.h" | |
22 | #include <ctype.h> | |
23 | #include "symtab.h" | |
24 | #include "frame.h" | |
25 | #include "breakpoint.h" | |
26 | #include "gdbtypes.h" | |
27 | #include "expression.h" | |
28 | #include "gdbcore.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "value.h" | |
31 | #include "command.h" | |
32 | #include "inferior.h" | |
33 | #include "gdbthread.h" | |
34 | #include "target.h" | |
35 | #include "language.h" | |
36 | #include "gdb_string.h" | |
37 | #include "demangle.h" | |
38 | #include "annotate.h" | |
39 | #include "symfile.h" | |
40 | #include "objfiles.h" | |
41 | ||
42 | /* Prototypes for local functions. */ | |
43 | ||
44 | static void | |
45 | catch_command_1 PARAMS ((char *, int, int)); | |
46 | ||
47 | static void | |
48 | enable_delete_command PARAMS ((char *, int)); | |
49 | ||
50 | static void | |
51 | enable_delete_breakpoint PARAMS ((struct breakpoint *)); | |
52 | ||
53 | static void | |
54 | enable_once_command PARAMS ((char *, int)); | |
55 | ||
56 | static void | |
57 | enable_once_breakpoint PARAMS ((struct breakpoint *)); | |
58 | ||
59 | static void | |
60 | disable_command PARAMS ((char *, int)); | |
61 | ||
62 | static void | |
63 | enable_command PARAMS ((char *, int)); | |
64 | ||
65 | static void | |
66 | map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *))); | |
67 | ||
68 | static void | |
69 | ignore_command PARAMS ((char *, int)); | |
70 | ||
71 | static int breakpoint_re_set_one PARAMS ((PTR)); | |
72 | ||
73 | static void | |
74 | clear_command PARAMS ((char *, int)); | |
75 | ||
76 | static void | |
77 | catch_command PARAMS ((char *, int)); | |
78 | ||
79 | static void | |
80 | handle_gnu_4_16_catch_command PARAMS ((char *, int, int)); | |
81 | ||
82 | static struct symtabs_and_lines | |
83 | get_catch_sals PARAMS ((int)); | |
84 | ||
85 | static void | |
86 | watch_command PARAMS ((char *, int)); | |
87 | ||
88 | static int | |
89 | can_use_hardware_watchpoint PARAMS ((struct value *)); | |
90 | ||
91 | void | |
92 | tbreak_command PARAMS ((char *, int)); | |
93 | ||
94 | static void | |
95 | break_command_1 PARAMS ((char *, int, int)); | |
96 | ||
97 | static void | |
98 | mention PARAMS ((struct breakpoint *)); | |
99 | ||
100 | struct breakpoint * | |
101 | set_raw_breakpoint PARAMS ((struct symtab_and_line)); | |
102 | ||
103 | static void | |
104 | check_duplicates PARAMS ((CORE_ADDR, asection *)); | |
105 | ||
106 | static void | |
107 | describe_other_breakpoints PARAMS ((CORE_ADDR, asection *)); | |
108 | ||
109 | static void | |
110 | breakpoints_info PARAMS ((char *, int)); | |
111 | ||
112 | static void | |
113 | breakpoint_1 PARAMS ((int, int)); | |
114 | ||
115 | static bpstat | |
116 | bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); | |
117 | ||
118 | static int breakpoint_cond_eval PARAMS ((PTR)); | |
119 | ||
120 | static void | |
121 | cleanup_executing_breakpoints PARAMS ((PTR)); | |
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 | void | |
133 | set_breakpoint_count PARAMS ((int)); | |
134 | ||
135 | #if 0 | |
136 | static struct breakpoint * | |
137 | create_temp_exception_breakpoint PARAMS ((CORE_ADDR)); | |
138 | #endif | |
139 | ||
140 | typedef enum { | |
141 | mark_inserted, | |
142 | mark_uninserted | |
143 | } insertion_state_t; | |
144 | ||
145 | static int | |
146 | remove_breakpoint PARAMS ((struct breakpoint *, insertion_state_t)); | |
147 | ||
148 | static int print_it_normal PARAMS ((bpstat)); | |
149 | ||
150 | typedef struct { | |
151 | enum exception_event_kind kind; | |
152 | int enable; | |
153 | } args_for_catchpoint_enable; | |
154 | ||
155 | static int watchpoint_check PARAMS ((PTR)); | |
156 | ||
157 | static int cover_target_enable_exception_callback PARAMS ((PTR)); | |
158 | ||
159 | static int print_it_done PARAMS ((bpstat)); | |
160 | ||
161 | static int print_it_noop PARAMS ((bpstat)); | |
162 | ||
163 | static void maintenance_info_breakpoints PARAMS ((char *, int)); | |
164 | ||
165 | #ifdef GET_LONGJMP_TARGET | |
166 | static void create_longjmp_breakpoint PARAMS ((char *)); | |
167 | #endif | |
168 | ||
169 | static int hw_breakpoint_used_count PARAMS ((void)); | |
170 | ||
171 | static int hw_watchpoint_used_count PARAMS ((enum bptype, int *)); | |
172 | ||
173 | static void hbreak_command PARAMS ((char *, int)); | |
174 | ||
175 | static void thbreak_command PARAMS ((char *, int)); | |
176 | ||
177 | static void watch_command_1 PARAMS ((char *, int, int)); | |
178 | ||
179 | static void rwatch_command PARAMS ((char *, int)); | |
180 | ||
181 | static void awatch_command PARAMS ((char *, int)); | |
182 | ||
183 | static void do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp)); | |
184 | ||
185 | /* Prototypes for exported functions. */ | |
186 | ||
187 | static void | |
188 | awatch_command PARAMS ((char *, int)); | |
189 | ||
190 | static void | |
191 | do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp)); | |
192 | ||
193 | /* If FALSE, gdb will not use hardware support for watchpoints, even | |
194 | if such is available. */ | |
195 | static int can_use_hw_watchpoints; | |
196 | ||
197 | void delete_command PARAMS ((char *, int)); | |
198 | ||
199 | void _initialize_breakpoint PARAMS ((void)); | |
200 | ||
201 | void set_breakpoint_count PARAMS ((int)); | |
202 | ||
203 | extern int addressprint; /* Print machine addresses? */ | |
204 | ||
205 | #if defined (GET_LONGJMP_TARGET) || defined (SOLIB_ADD) | |
206 | static int internal_breakpoint_number = -1; | |
207 | #endif | |
208 | ||
209 | /* Are we executing breakpoint commands? */ | |
210 | static int executing_breakpoint_commands; | |
211 | ||
212 | /* Walk the following statement or block through all breakpoints. | |
213 | ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current | |
214 | breakpoint. */ | |
215 | ||
216 | #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) | |
217 | ||
218 | #define ALL_BREAKPOINTS_SAFE(b,tmp) \ | |
219 | for (b = breakpoint_chain; \ | |
220 | b? (tmp=b->next, 1): 0; \ | |
221 | b = tmp) | |
222 | ||
223 | /* True if SHIFT_INST_REGS defined, false otherwise. */ | |
224 | ||
225 | int must_shift_inst_regs = | |
226 | #if defined(SHIFT_INST_REGS) | |
227 | 1 | |
228 | #else | |
229 | 0 | |
230 | #endif | |
231 | ; | |
232 | ||
233 | /* True if breakpoint hit counts should be displayed in breakpoint info. */ | |
234 | ||
235 | int show_breakpoint_hit_counts = 1; | |
236 | ||
237 | /* Chain of all breakpoints defined. */ | |
238 | ||
239 | struct breakpoint *breakpoint_chain; | |
240 | ||
241 | /* Number of last breakpoint made. */ | |
242 | ||
243 | int breakpoint_count; | |
244 | ||
245 | /* Pointer to current exception event record */ | |
246 | static struct exception_event_record * current_exception_event; | |
247 | ||
248 | /* Indicator of whether exception catchpoints should be nuked | |
249 | between runs of a program */ | |
250 | int exception_catchpoints_are_fragile = 0; | |
251 | ||
252 | /* Indicator of when exception catchpoints set-up should be | |
253 | reinitialized -- e.g. when program is re-run */ | |
254 | int exception_support_initialized = 0; | |
255 | ||
256 | /* This function returns a pointer to the string representation of the | |
257 | pathname of the dynamically-linked library that has just been | |
258 | loaded. | |
259 | ||
260 | This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE, | |
261 | or undefined results are guaranteed. | |
262 | ||
263 | This string's contents are only valid immediately after the | |
264 | inferior has stopped in the dynamic linker hook, and becomes | |
265 | invalid as soon as the inferior is continued. Clients should make | |
266 | a copy of this string if they wish to continue the inferior and | |
267 | then access the string. */ | |
268 | ||
269 | #ifndef SOLIB_LOADED_LIBRARY_PATHNAME | |
270 | #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) "" | |
271 | #endif | |
272 | ||
273 | /* This function returns a pointer to the string representation of the | |
274 | pathname of the dynamically-linked library that has just been | |
275 | unloaded. | |
276 | ||
277 | This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is | |
278 | TRUE, or undefined results are guaranteed. | |
279 | ||
280 | This string's contents are only valid immediately after the | |
281 | inferior has stopped in the dynamic linker hook, and becomes | |
282 | invalid as soon as the inferior is continued. Clients should make | |
283 | a copy of this string if they wish to continue the inferior and | |
284 | then access the string. */ | |
285 | ||
286 | #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME | |
287 | #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) "" | |
288 | #endif | |
289 | ||
290 | /* This function is called by the "catch load" command. It allows the | |
291 | debugger to be notified by the dynamic linker when a specified | |
292 | library file (or any library file, if filename is NULL) is loaded. */ | |
293 | ||
294 | #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK | |
295 | #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \ | |
296 | error ("catch of library loads not yet implemented on this platform") | |
297 | #endif | |
298 | ||
299 | /* This function is called by the "catch unload" command. It allows | |
300 | the debugger to be notified by the dynamic linker when a specified | |
301 | library file (or any library file, if filename is NULL) is | |
302 | unloaded. */ | |
303 | ||
304 | #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK | |
305 | #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \ | |
306 | error ("catch of library unloads not yet implemented on this platform") | |
307 | #endif | |
308 | ||
309 | /* Set breakpoint count to NUM. */ | |
310 | ||
311 | void | |
312 | set_breakpoint_count (num) | |
313 | int num; | |
314 | { | |
315 | breakpoint_count = num; | |
316 | set_internalvar (lookup_internalvar ("bpnum"), | |
317 | value_from_longest (builtin_type_int, (LONGEST) num)); | |
318 | } | |
319 | ||
320 | /* Used in run_command to zero the hit count when a new run starts. */ | |
321 | ||
322 | void | |
323 | clear_breakpoint_hit_counts () | |
324 | { | |
325 | struct breakpoint *b; | |
326 | ||
327 | ALL_BREAKPOINTS (b) | |
328 | b->hit_count = 0; | |
329 | } | |
330 | ||
331 | /* Default address, symtab and line to put a breakpoint at | |
332 | for "break" command with no arg. | |
333 | if default_breakpoint_valid is zero, the other three are | |
334 | not valid, and "break" with no arg is an error. | |
335 | ||
336 | This set by print_stack_frame, which calls set_default_breakpoint. */ | |
337 | ||
338 | int default_breakpoint_valid; | |
339 | CORE_ADDR default_breakpoint_address; | |
340 | struct symtab *default_breakpoint_symtab; | |
341 | int default_breakpoint_line; | |
342 | \f | |
343 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. | |
344 | Advance *PP after the string and any trailing whitespace. | |
345 | ||
346 | Currently the string can either be a number or "$" followed by the name | |
347 | of a convenience variable. Making it an expression wouldn't work well | |
348 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ | |
349 | static int | |
350 | get_number (pp) | |
351 | char **pp; | |
352 | { | |
353 | int retval; | |
354 | char *p = *pp; | |
355 | ||
356 | if (p == NULL) | |
357 | /* Empty line means refer to the last breakpoint. */ | |
358 | return breakpoint_count; | |
359 | else if (*p == '$') | |
360 | { | |
361 | /* Make a copy of the name, so we can null-terminate it | |
362 | to pass to lookup_internalvar(). */ | |
363 | char *varname; | |
364 | char *start = ++p; | |
365 | value_ptr val; | |
366 | ||
367 | while (isalnum (*p) || *p == '_') | |
368 | p++; | |
369 | varname = (char *) alloca (p - start + 1); | |
370 | strncpy (varname, start, p - start); | |
371 | varname[p - start] = '\0'; | |
372 | val = value_of_internalvar (lookup_internalvar (varname)); | |
373 | if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT) | |
374 | error ( | |
375 | "Convenience variables used to specify breakpoints must have integer values." | |
376 | ); | |
377 | retval = (int) value_as_long (val); | |
378 | } | |
379 | else | |
380 | { | |
381 | if (*p == '-') | |
382 | ++p; | |
383 | while (*p >= '0' && *p <= '9') | |
384 | ++p; | |
385 | if (p == *pp) | |
386 | /* There is no number here. (e.g. "cond a == b"). */ | |
387 | error_no_arg ("breakpoint number"); | |
388 | retval = atoi (*pp); | |
389 | } | |
390 | if (!(isspace (*p) || *p == '\0')) | |
391 | error ("breakpoint number expected"); | |
392 | while (isspace (*p)) | |
393 | p++; | |
394 | *pp = p; | |
395 | return retval; | |
396 | } | |
397 | \f | |
398 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ | |
399 | ||
400 | static void | |
401 | condition_command (arg, from_tty) | |
402 | char *arg; | |
403 | int from_tty; | |
404 | { | |
405 | register struct breakpoint *b; | |
406 | char *p; | |
407 | register int bnum; | |
408 | ||
409 | if (arg == 0) | |
410 | error_no_arg ("breakpoint number"); | |
411 | ||
412 | p = arg; | |
413 | bnum = get_number (&p); | |
414 | ||
415 | ALL_BREAKPOINTS (b) | |
416 | if (b->number == bnum) | |
417 | { | |
418 | if (b->cond) | |
419 | { | |
420 | free ((PTR)b->cond); | |
421 | b->cond = 0; | |
422 | } | |
423 | if (b->cond_string != NULL) | |
424 | free ((PTR)b->cond_string); | |
425 | ||
426 | if (*p == 0) | |
427 | { | |
428 | b->cond = 0; | |
429 | b->cond_string = NULL; | |
430 | if (from_tty) | |
431 | printf_filtered ("Breakpoint %d now unconditional.\n", bnum); | |
432 | } | |
433 | else | |
434 | { | |
435 | arg = p; | |
436 | /* I don't know if it matters whether this is the string the user | |
437 | typed in or the decompiled expression. */ | |
438 | b->cond_string = savestring (arg, strlen (arg)); | |
439 | b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); | |
440 | if (*arg) | |
441 | error ("Junk at end of expression"); | |
442 | } | |
443 | breakpoints_changed (); | |
444 | return; | |
445 | } | |
446 | ||
447 | error ("No breakpoint number %d.", bnum); | |
448 | } | |
449 | ||
450 | /* ARGSUSED */ | |
451 | static void | |
452 | commands_command (arg, from_tty) | |
453 | char *arg; | |
454 | int from_tty; | |
455 | { | |
456 | register struct breakpoint *b; | |
457 | char *p; | |
458 | register int bnum; | |
459 | struct command_line *l; | |
460 | ||
461 | /* If we allowed this, we would have problems with when to | |
462 | free the storage, if we change the commands currently | |
463 | being read from. */ | |
464 | ||
465 | if (executing_breakpoint_commands) | |
466 | error ("Can't use the \"commands\" command among a breakpoint's commands."); | |
467 | ||
468 | p = arg; | |
469 | bnum = get_number (&p); | |
470 | if (p && *p) | |
471 | error ("Unexpected extra arguments following breakpoint number."); | |
472 | ||
473 | ALL_BREAKPOINTS (b) | |
474 | if (b->number == bnum) | |
475 | { | |
476 | char tmpbuf[128]; | |
477 | sprintf (tmpbuf, "Type commands for when breakpoint %d is hit, one per line.", bnum); | |
478 | l = read_command_lines (tmpbuf, from_tty); | |
479 | free_command_lines (&b->commands); | |
480 | b->commands = l; | |
481 | breakpoints_changed (); | |
482 | return; | |
483 | } | |
484 | error ("No breakpoint number %d.", bnum); | |
485 | } | |
486 | \f | |
487 | /* Like target_read_memory() but if breakpoints are inserted, return | |
488 | the shadow contents instead of the breakpoints themselves. | |
489 | ||
490 | Read "memory data" from whatever target or inferior we have. | |
491 | Returns zero if successful, errno value if not. EIO is used | |
492 | for address out of bounds. If breakpoints are inserted, returns | |
493 | shadow contents, not the breakpoints themselves. From breakpoint.c. */ | |
494 | ||
495 | int | |
496 | read_memory_nobpt (memaddr, myaddr, len) | |
497 | CORE_ADDR memaddr; | |
498 | char *myaddr; | |
499 | unsigned len; | |
500 | { | |
501 | int status; | |
502 | struct breakpoint *b; | |
503 | CORE_ADDR bp_addr = 0; | |
504 | int bp_size = 0; | |
505 | ||
506 | if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL) | |
507 | /* No breakpoints on this machine. */ | |
508 | return target_read_memory (memaddr, myaddr, len); | |
509 | ||
510 | ALL_BREAKPOINTS (b) | |
511 | { | |
512 | if (b->type == bp_none) | |
513 | warning ("attempted to read through apparently deleted breakpoint #%d?\n", b->number); | |
514 | ||
515 | /* memory breakpoint? */ | |
516 | if (b->type == bp_watchpoint | |
517 | || b->type == bp_hardware_watchpoint | |
518 | || b->type == bp_read_watchpoint | |
519 | || b->type == bp_access_watchpoint) | |
520 | continue; | |
521 | /* bp in memory? */ | |
522 | if (!b->inserted) | |
523 | continue; | |
524 | /* Addresses and length of the part of the breakpoint that | |
525 | we need to copy. */ | |
526 | /* XXXX The m68k, sh and h8300 have different local and remote | |
527 | breakpoint values. BREAKPOINT_FROM_PC still manages to | |
528 | correctly determine the breakpoints memory address and size | |
529 | for these targets. */ | |
530 | bp_addr = b->address; | |
531 | bp_size = 0; | |
532 | if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL) | |
533 | continue; | |
534 | if (bp_size == 0) | |
535 | /* bp isn't valid */ | |
536 | continue; | |
537 | if (bp_addr + bp_size <= memaddr) | |
538 | /* The breakpoint is entirely before the chunk of memory we | |
539 | are reading. */ | |
540 | continue; | |
541 | if (bp_addr >= memaddr + len) | |
542 | /* The breakpoint is entirely after the chunk of memory we are | |
543 | reading. */ | |
544 | continue; | |
545 | /* Copy the breakpoint from the shadow contents, and recurse for | |
546 | the things before and after. */ | |
547 | { | |
548 | /* Offset within shadow_contents. */ | |
549 | int bptoffset = 0; | |
550 | ||
551 | if (bp_addr < memaddr) | |
552 | { | |
553 | /* Only copy the second part of the breakpoint. */ | |
554 | bp_size -= memaddr - bp_addr; | |
555 | bptoffset = memaddr - bp_addr; | |
556 | bp_addr = memaddr; | |
557 | } | |
558 | ||
559 | if (bp_addr + bp_size > memaddr + len) | |
560 | { | |
561 | /* Only copy the first part of the breakpoint. */ | |
562 | bp_size -= (bp_addr + bp_size) - (memaddr + len); | |
563 | } | |
564 | ||
565 | memcpy (myaddr + bp_addr - memaddr, | |
566 | b->shadow_contents + bptoffset, bp_size); | |
567 | ||
568 | if (bp_addr > memaddr) | |
569 | { | |
570 | /* Copy the section of memory before the breakpoint. */ | |
571 | status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr); | |
572 | if (status != 0) | |
573 | return status; | |
574 | } | |
575 | ||
576 | if (bp_addr + bp_size < memaddr + len) | |
577 | { | |
578 | /* Copy the section of memory after the breakpoint. */ | |
579 | status = read_memory_nobpt | |
580 | (bp_addr + bp_size, | |
581 | myaddr + bp_addr + bp_size - memaddr, | |
582 | memaddr + len - (bp_addr + bp_size)); | |
583 | if (status != 0) | |
584 | return status; | |
585 | } | |
586 | return 0; | |
587 | } | |
588 | } | |
589 | /* Nothing overlaps. Just call read_memory_noerr. */ | |
590 | return target_read_memory (memaddr, myaddr, len); | |
591 | } | |
592 | ||
593 | \f | |
594 | /* insert_breakpoints is used when starting or continuing the program. | |
595 | remove_breakpoints is used when the program stops. | |
596 | Both return zero if successful, | |
597 | or an `errno' value if could not write the inferior. */ | |
598 | ||
599 | int | |
600 | insert_breakpoints () | |
601 | { | |
602 | register struct breakpoint *b, *temp; | |
603 | int val = 0; | |
604 | int disabled_breaks = 0; | |
605 | ||
606 | static char message1[] = "Error inserting catchpoint %d:\n"; | |
607 | static char message[sizeof (message1) + 30]; | |
608 | ||
609 | ||
610 | ALL_BREAKPOINTS_SAFE (b, temp) | |
611 | { | |
612 | if (b->type != bp_watchpoint | |
613 | && b->type != bp_hardware_watchpoint | |
614 | && b->type != bp_read_watchpoint | |
615 | && b->type != bp_access_watchpoint | |
616 | && b->type != bp_catch_fork | |
617 | && b->type != bp_catch_vfork | |
618 | && b->type != bp_catch_exec | |
619 | && b->type != bp_catch_throw | |
620 | && b->type != bp_catch_catch | |
621 | && b->enable != disabled | |
622 | && b->enable != shlib_disabled | |
623 | && b->enable != call_disabled | |
624 | && ! b->inserted | |
625 | && ! b->duplicate) | |
626 | { | |
627 | if (b->type == bp_hardware_breakpoint) | |
628 | val = target_insert_hw_breakpoint(b->address, b->shadow_contents); | |
629 | else | |
630 | { | |
631 | /* Check to see if breakpoint is in an overlay section; | |
632 | if so, we should set the breakpoint at the LMA address. | |
633 | Only if the section is currently mapped should we ALSO | |
634 | set a break at the VMA address. */ | |
635 | if (overlay_debugging && b->section && | |
636 | section_is_overlay (b->section)) | |
637 | { | |
638 | CORE_ADDR addr; | |
639 | ||
640 | addr = overlay_unmapped_address (b->address, b->section); | |
641 | val = target_insert_breakpoint (addr, b->shadow_contents); | |
642 | /* This would be the time to check val, to see if the | |
643 | breakpoint write to the load address succeeded. | |
644 | However, this might be an ordinary occurrance, eg. if | |
645 | the unmapped overlay is in ROM. */ | |
646 | val = 0; /* in case unmapped address failed */ | |
647 | if (section_is_mapped (b->section)) | |
648 | val = target_insert_breakpoint (b->address, | |
649 | b->shadow_contents); | |
650 | } | |
651 | else /* ordinary (non-overlay) address */ | |
652 | val = target_insert_breakpoint(b->address, b->shadow_contents); | |
653 | } | |
654 | if (val) | |
655 | { | |
656 | /* Can't set the breakpoint. */ | |
657 | #if defined (DISABLE_UNSETTABLE_BREAK) | |
658 | if (DISABLE_UNSETTABLE_BREAK (b->address)) | |
659 | { | |
660 | /* See also: disable_breakpoints_in_shlibs. */ | |
661 | val = 0; | |
662 | b->enable = shlib_disabled; | |
663 | if (!disabled_breaks) | |
664 | { | |
665 | target_terminal_ours_for_output (); | |
666 | fprintf_unfiltered (gdb_stderr, | |
667 | "Cannot insert breakpoint %d:\n", b->number); | |
668 | printf_filtered ("Temporarily disabling shared library breakpoints:\n"); | |
669 | } | |
670 | disabled_breaks = 1; | |
671 | printf_filtered ("%d ", b->number); | |
672 | } | |
673 | else | |
674 | #endif | |
675 | { | |
676 | target_terminal_ours_for_output (); | |
677 | fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); | |
678 | #ifdef ONE_PROCESS_WRITETEXT | |
679 | fprintf_unfiltered (gdb_stderr, | |
680 | "The same program may be running in another process.\n"); | |
681 | #endif | |
682 | memory_error (val, b->address); /* which bombs us out */ | |
683 | } | |
684 | } | |
685 | else | |
686 | b->inserted = 1; | |
687 | } | |
688 | else if (ep_is_exception_catchpoint (b) | |
689 | && b->enable != disabled | |
690 | && b->enable != shlib_disabled | |
691 | && b->enable != call_disabled | |
692 | && ! b->inserted | |
693 | && ! b->duplicate) | |
694 | ||
695 | { | |
696 | /* If we get here, we must have a callback mechanism for exception | |
697 | events -- with g++ style embedded label support, we insert | |
698 | ordinary breakpoints and not catchpoints. */ | |
699 | sprintf (message, message1, b->number); /* Format possible error message */ | |
700 | ||
701 | val = target_insert_breakpoint(b->address, b->shadow_contents); | |
702 | if (val) | |
703 | { | |
704 | /* Couldn't set breakpoint for some reason */ | |
705 | target_terminal_ours_for_output (); | |
706 | fprintf_unfiltered (gdb_stderr, | |
707 | "Cannot insert catchpoint %d; disabling it\n", b->number); | |
708 | b->enable = disabled; | |
709 | } | |
710 | else | |
711 | { | |
712 | /* Bp set, now make sure callbacks are enabled */ | |
713 | int val; | |
714 | args_for_catchpoint_enable args; | |
715 | args.kind = b->type == bp_catch_catch ? EX_EVENT_CATCH : EX_EVENT_THROW; | |
716 | args.enable = 1; | |
717 | val = catch_errors (cover_target_enable_exception_callback, | |
718 | &args, | |
719 | message, RETURN_MASK_ALL); | |
720 | if (val != 0 && val != -1) | |
721 | { | |
722 | b->inserted = 1; | |
723 | } | |
724 | /* Check if something went wrong; val == 0 can be ignored */ | |
725 | if (val == -1) | |
726 | { | |
727 | /* something went wrong */ | |
728 | target_terminal_ours_for_output (); | |
729 | fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d; disabling it\n", b->number); | |
730 | b->enable = disabled; | |
731 | } | |
732 | } | |
733 | } | |
734 | ||
735 | else if ((b->type == bp_hardware_watchpoint || | |
736 | b->type == bp_read_watchpoint || | |
737 | b->type == bp_access_watchpoint) | |
738 | && b->enable == enabled | |
739 | && ! b->inserted | |
740 | && ! b->duplicate) | |
741 | { | |
742 | struct frame_info *saved_frame; | |
743 | int saved_level, within_current_scope; | |
744 | value_ptr mark = value_mark (); | |
745 | value_ptr v; | |
746 | ||
747 | /* Save the current frame and level so we can restore it after | |
748 | evaluating the watchpoint expression on its own frame. */ | |
749 | saved_frame = selected_frame; | |
750 | saved_level = selected_frame_level; | |
751 | ||
752 | /* Determine if the watchpoint is within scope. */ | |
753 | if (b->exp_valid_block == NULL) | |
754 | within_current_scope = 1; | |
755 | else | |
756 | { | |
757 | struct frame_info *fi; | |
758 | ||
759 | /* There might be no current frame at this moment if we are | |
760 | resuming from a step over a breakpoint. | |
761 | Set up current frame before trying to find the watchpoint | |
762 | frame. */ | |
763 | get_current_frame (); | |
764 | fi = find_frame_addr_in_frame_chain (b->watchpoint_frame); | |
765 | within_current_scope = (fi != NULL); | |
766 | if (within_current_scope) | |
767 | select_frame (fi, -1); | |
768 | } | |
769 | ||
770 | if (within_current_scope) | |
771 | { | |
772 | /* Evaluate the expression and cut the chain of values | |
773 | produced off from the value chain. */ | |
774 | v = evaluate_expression (b->exp); | |
775 | value_release_to_mark (mark); | |
776 | ||
777 | b->val_chain = v; | |
778 | b->inserted = 1; | |
779 | ||
780 | /* Look at each value on the value chain. */ | |
781 | for ( ; v; v=v->next) | |
782 | { | |
783 | /* If it's a memory location, then we must watch it. */ | |
784 | if (v->lval == lval_memory) | |
785 | { | |
786 | int addr, len, type; | |
787 | ||
788 | addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); | |
789 | len = TYPE_LENGTH (VALUE_TYPE (v)); | |
790 | type = 0; | |
791 | if (b->type == bp_read_watchpoint) | |
792 | type = 1; | |
793 | else if (b->type == bp_access_watchpoint) | |
794 | type = 2; | |
795 | ||
796 | val = target_insert_watchpoint (addr, len, type); | |
797 | if (val == -1) | |
798 | { | |
799 | b->inserted = 0; | |
800 | break; | |
801 | } | |
802 | val = 0; | |
803 | } | |
804 | } | |
805 | /* Failure to insert a watchpoint on any memory value in the | |
806 | value chain brings us here. */ | |
807 | if (!b->inserted) | |
808 | warning ("Hardware watchpoint %d: Could not insert watchpoint\n", | |
809 | b->number); | |
810 | } | |
811 | else | |
812 | { | |
813 | printf_filtered ("\ | |
814 | Hardware watchpoint %d deleted because the program has left the block in\n\ | |
815 | which its expression is valid.\n", b->number); | |
816 | if (b->related_breakpoint) | |
817 | b->related_breakpoint->disposition = del_at_next_stop; | |
818 | b->disposition = del_at_next_stop; | |
819 | } | |
820 | ||
821 | /* Restore the frame and level. */ | |
822 | if ((saved_frame != selected_frame) || | |
823 | (saved_level != selected_frame_level)) | |
824 | select_and_print_frame (saved_frame, saved_level); | |
825 | } | |
826 | else if ((b->type == bp_catch_fork | |
827 | || b->type == bp_catch_vfork | |
828 | || b->type == bp_catch_exec) | |
829 | && b->enable == enabled | |
830 | && ! b->inserted | |
831 | && ! b->duplicate) | |
832 | { | |
833 | val = -1; | |
834 | switch (b->type) | |
835 | { | |
836 | case bp_catch_fork : | |
837 | val = target_insert_fork_catchpoint (inferior_pid); | |
838 | break; | |
839 | case bp_catch_vfork : | |
840 | val = target_insert_vfork_catchpoint (inferior_pid); | |
841 | break; | |
842 | case bp_catch_exec : | |
843 | val = target_insert_exec_catchpoint (inferior_pid); | |
844 | break; | |
845 | } | |
846 | if (val < 0) | |
847 | { | |
848 | target_terminal_ours_for_output (); | |
849 | fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d:\n", b->number); | |
850 | } | |
851 | else | |
852 | b->inserted = 1; | |
853 | } | |
854 | } | |
855 | if (disabled_breaks) | |
856 | printf_filtered ("\n"); | |
857 | ||
858 | return val; | |
859 | } | |
860 | ||
861 | ||
862 | int | |
863 | remove_breakpoints () | |
864 | { | |
865 | register struct breakpoint *b; | |
866 | int val; | |
867 | ||
868 | ALL_BREAKPOINTS (b) | |
869 | { | |
870 | if (b->inserted) | |
871 | { | |
872 | val = remove_breakpoint (b, mark_uninserted); | |
873 | if (val != 0) | |
874 | return val; | |
875 | } | |
876 | } | |
877 | return 0; | |
878 | } | |
879 | ||
880 | int | |
881 | reattach_breakpoints (pid) | |
882 | int pid; | |
883 | { | |
884 | register struct breakpoint *b; | |
885 | int val; | |
886 | int saved_inferior_pid = inferior_pid; | |
887 | ||
888 | inferior_pid = pid; /* Because remove_breakpoint will use this global. */ | |
889 | ALL_BREAKPOINTS (b) | |
890 | { | |
891 | if (b->inserted) | |
892 | { | |
893 | remove_breakpoint (b, mark_inserted); | |
894 | if (b->type == bp_hardware_breakpoint) | |
895 | val = target_insert_hw_breakpoint(b->address, b->shadow_contents); | |
896 | else | |
897 | val = target_insert_breakpoint(b->address, b->shadow_contents); | |
898 | if (val != 0) | |
899 | { | |
900 | inferior_pid = saved_inferior_pid; | |
901 | return val; | |
902 | } | |
903 | } | |
904 | } | |
905 | inferior_pid = saved_inferior_pid; | |
906 | return 0; | |
907 | } | |
908 | ||
909 | void | |
910 | update_breakpoints_after_exec () | |
911 | { | |
912 | struct breakpoint * b; | |
913 | struct breakpoint * temp; | |
914 | ||
915 | /* Doing this first prevents the badness of having delete_breakpoint() | |
916 | write a breakpoint's current "shadow contents" to lift the bp. That | |
917 | shadow is NOT valid after an exec()! */ | |
918 | mark_breakpoints_out (); | |
919 | ||
920 | ALL_BREAKPOINTS_SAFE (b, temp) | |
921 | { | |
922 | /* Solib breakpoints must be explicitly reset after an exec(). */ | |
923 | if (b->type == bp_shlib_event) | |
924 | { | |
925 | delete_breakpoint (b); | |
926 | continue; | |
927 | } | |
928 | ||
929 | /* Step-resume breakpoints are meaningless after an exec(). */ | |
930 | if (b->type == bp_step_resume) | |
931 | { | |
932 | delete_breakpoint (b); | |
933 | continue; | |
934 | } | |
935 | ||
936 | /* Ditto the sigtramp handler breakpoints. */ | |
937 | if (b->type == bp_through_sigtramp) | |
938 | { | |
939 | delete_breakpoint (b); | |
940 | continue; | |
941 | } | |
942 | ||
943 | /* Ditto the exception-handling catchpoints. */ | |
944 | if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw)) | |
945 | { | |
946 | delete_breakpoint (b); | |
947 | continue; | |
948 | } | |
949 | ||
950 | /* Don't delete an exec catchpoint, because else the inferior | |
951 | won't stop when it ought! | |
952 | ||
953 | Similarly, we probably ought to keep vfork catchpoints, 'cause | |
954 | on this target, we may not be able to stop when the vfork is seen, | |
955 | but only when the subsequent exec is seen. (And because deleting | |
956 | fork catchpoints here but not vfork catchpoints will seem mysterious | |
957 | to users, keep those too.) | |
958 | ||
959 | ??rehrauer: Let's hope that merely clearing out this catchpoint's | |
960 | target address field, if any, is sufficient to have it be reset | |
961 | automagically. Certainly on HP-UX that's true. */ | |
962 | if ((b->type == bp_catch_exec) || | |
963 | (b->type == bp_catch_vfork) || | |
964 | (b->type == bp_catch_fork)) | |
965 | { | |
966 | b->address = (CORE_ADDR) NULL; | |
967 | continue; | |
968 | } | |
969 | ||
970 | /* bp_finish is a special case. The only way we ought to be able | |
971 | to see one of these when an exec() has happened, is if the user | |
972 | caught a vfork, and then said "finish". Ordinarily a finish just | |
973 | carries them to the call-site of the current callee, by setting | |
974 | a temporary bp there and resuming. But in this case, the finish | |
975 | will carry them entirely through the vfork & exec. | |
976 | ||
977 | We don't want to allow a bp_finish to remain inserted now. But | |
978 | we can't safely delete it, 'cause finish_command has a handle to | |
979 | the bp on a bpstat, and will later want to delete it. There's a | |
980 | chance (and I've seen it happen) that if we delete the bp_finish | |
981 | here, that its storage will get reused by the time finish_command | |
982 | gets 'round to deleting the "use to be a bp_finish" breakpoint. | |
983 | We really must allow finish_command to delete a bp_finish. | |
984 | ||
985 | In the absense of a general solution for the "how do we know it's | |
986 | safe to delete something others may have handles to?" problem, what | |
987 | we'll do here is just uninsert the bp_finish, and let finish_command | |
988 | delete it. | |
989 | ||
990 | (We know the bp_finish is "doomed" in the sense that it's momentary, | |
991 | and will be deleted as soon as finish_command sees the inferior stopped. | |
992 | So it doesn't matter that the bp's address is probably bogus in the | |
993 | new a.out, unlike e.g., the solib breakpoints.) */ | |
994 | if (b->type == bp_finish) | |
995 | { | |
996 | continue; | |
997 | } | |
998 | ||
999 | /* Without a symbolic address, we have little hope of the | |
1000 | pre-exec() address meaning the same thing in the post-exec() | |
1001 | a.out. */ | |
1002 | if (b->addr_string == NULL) | |
1003 | { | |
1004 | delete_breakpoint (b); | |
1005 | continue; | |
1006 | } | |
1007 | ||
1008 | /* If this breakpoint has survived the above battery of checks, then | |
1009 | it must have a symbolic address. Be sure that it gets reevaluated | |
1010 | to a target address, rather than reusing the old evaluation. */ | |
1011 | b->address = (CORE_ADDR) NULL; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | int | |
1016 | detach_breakpoints (pid) | |
1017 | int pid; | |
1018 | { | |
1019 | register struct breakpoint *b; | |
1020 | int val; | |
1021 | int saved_inferior_pid = inferior_pid; | |
1022 | ||
1023 | if (pid == inferior_pid) | |
1024 | error ("Cannot detach breakpoints of inferior_pid"); | |
1025 | ||
1026 | inferior_pid = pid; /* Because remove_breakpoint will use this global. */ | |
1027 | ALL_BREAKPOINTS (b) | |
1028 | { | |
1029 | if (b->inserted) | |
1030 | { | |
1031 | val = remove_breakpoint (b, mark_inserted); | |
1032 | if (val != 0) | |
1033 | { | |
1034 | inferior_pid = saved_inferior_pid; | |
1035 | return val; | |
1036 | } | |
1037 | } | |
1038 | } | |
1039 | inferior_pid = saved_inferior_pid; | |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static int | |
1044 | remove_breakpoint (b, is) | |
1045 | struct breakpoint *b; | |
1046 | insertion_state_t is; | |
1047 | { | |
1048 | int val; | |
1049 | ||
1050 | if (b->type == bp_none) | |
1051 | warning ("attempted to remove apparently deleted breakpoint #%d?\n", b->number); | |
1052 | ||
1053 | if (b->type != bp_watchpoint | |
1054 | && b->type != bp_hardware_watchpoint | |
1055 | && b->type != bp_read_watchpoint | |
1056 | && b->type != bp_access_watchpoint | |
1057 | && b->type != bp_catch_fork | |
1058 | && b->type != bp_catch_vfork | |
1059 | && b->type != bp_catch_exec | |
1060 | && b->type != bp_catch_catch | |
1061 | && b->type != bp_catch_throw) | |
1062 | ||
1063 | { | |
1064 | if (b->type == bp_hardware_breakpoint) | |
1065 | val = target_remove_hw_breakpoint(b->address, b->shadow_contents); | |
1066 | else | |
1067 | { | |
1068 | /* Check to see if breakpoint is in an overlay section; | |
1069 | if so, we should remove the breakpoint at the LMA address. | |
1070 | If that is not equal to the raw address, then we should | |
1071 | presumable remove the breakpoint there as well. */ | |
1072 | if (overlay_debugging && b->section && | |
1073 | section_is_overlay (b->section)) | |
1074 | { | |
1075 | CORE_ADDR addr; | |
1076 | ||
1077 | addr = overlay_unmapped_address (b->address, b->section); | |
1078 | val = target_remove_breakpoint (addr, b->shadow_contents); | |
1079 | /* This would be the time to check val, to see if the | |
1080 | shadow breakpoint write to the load address succeeded. | |
1081 | However, this might be an ordinary occurrance, eg. if | |
1082 | the unmapped overlay is in ROM. */ | |
1083 | val = 0; /* in case unmapped address failed */ | |
1084 | if (section_is_mapped (b->section)) | |
1085 | val = target_remove_breakpoint (b->address, | |
1086 | b->shadow_contents); | |
1087 | } | |
1088 | else /* ordinary (non-overlay) address */ | |
1089 | val = target_remove_breakpoint(b->address, b->shadow_contents); | |
1090 | } | |
1091 | if (val) | |
1092 | return val; | |
1093 | b->inserted = (is == mark_inserted); | |
1094 | } | |
1095 | else if ((b->type == bp_hardware_watchpoint || | |
1096 | b->type == bp_read_watchpoint || | |
1097 | b->type == bp_access_watchpoint) | |
1098 | && b->enable == enabled | |
1099 | && ! b->duplicate) | |
1100 | { | |
1101 | value_ptr v, n; | |
1102 | ||
1103 | b->inserted = (is == mark_inserted); | |
1104 | /* Walk down the saved value chain. */ | |
1105 | for (v = b->val_chain; v; v = v->next) | |
1106 | { | |
1107 | /* For each memory reference remove the watchpoint | |
1108 | at that address. */ | |
1109 | if (v->lval == lval_memory) | |
1110 | { | |
1111 | int addr, len, type; | |
1112 | ||
1113 | addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); | |
1114 | len = TYPE_LENGTH (VALUE_TYPE (v)); | |
1115 | type = 0; | |
1116 | if (b->type == bp_read_watchpoint) | |
1117 | type = 1; | |
1118 | else if (b->type == bp_access_watchpoint) | |
1119 | type = 2; | |
1120 | ||
1121 | val = target_remove_watchpoint (addr, len, type); | |
1122 | if (val == -1) | |
1123 | b->inserted = 1; | |
1124 | val = 0; | |
1125 | } | |
1126 | } | |
1127 | /* Failure to remove any of the hardware watchpoints comes here. */ | |
1128 | if ((is == mark_uninserted) && (b->inserted)) | |
1129 | warning ("Hardware watchpoint %d: Could not remove watchpoint\n", | |
1130 | b->number); | |
1131 | ||
1132 | /* Free the saved value chain. We will construct a new one | |
1133 | the next time the watchpoint is inserted. */ | |
1134 | for (v = b->val_chain; v; v = n) | |
1135 | { | |
1136 | n = v->next; | |
1137 | value_free (v); | |
1138 | } | |
1139 | b->val_chain = NULL; | |
1140 | } | |
1141 | else if ((b->type == bp_catch_fork || | |
1142 | b->type == bp_catch_vfork || | |
1143 | b->type == bp_catch_exec) | |
1144 | && b->enable == enabled | |
1145 | && ! b->duplicate) | |
1146 | { | |
1147 | val = -1; | |
1148 | switch (b->type) | |
1149 | { | |
1150 | case bp_catch_fork: | |
1151 | val = target_remove_fork_catchpoint (inferior_pid); | |
1152 | break; | |
1153 | case bp_catch_vfork : | |
1154 | val = target_remove_vfork_catchpoint (inferior_pid); | |
1155 | break; | |
1156 | case bp_catch_exec : | |
1157 | val = target_remove_exec_catchpoint (inferior_pid); | |
1158 | break; | |
1159 | } | |
1160 | if (val) | |
1161 | return val; | |
1162 | b->inserted = (is == mark_inserted); | |
1163 | } | |
1164 | else if ((b->type == bp_catch_catch || | |
1165 | b->type == bp_catch_throw) | |
1166 | && b->enable == enabled | |
1167 | && ! b->duplicate) | |
1168 | { | |
1169 | ||
1170 | val = target_remove_breakpoint(b->address, b->shadow_contents); | |
1171 | if (val) | |
1172 | return val; | |
1173 | b->inserted = (is == mark_inserted); | |
1174 | } | |
1175 | else if (ep_is_exception_catchpoint (b) | |
1176 | && b->inserted /* sometimes previous insert doesn't happen */ | |
1177 | && b->enable == enabled | |
1178 | && ! b->duplicate) | |
1179 | { | |
1180 | ||
1181 | val = target_remove_breakpoint(b->address, b->shadow_contents); | |
1182 | if (val) | |
1183 | return val; | |
1184 | ||
1185 | b->inserted = (is == mark_inserted); | |
1186 | } | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | /* Clear the "inserted" flag in all breakpoints. */ | |
1192 | ||
1193 | void | |
1194 | mark_breakpoints_out () | |
1195 | { | |
1196 | register struct breakpoint *b; | |
1197 | ||
1198 | ALL_BREAKPOINTS (b) | |
1199 | b->inserted = 0; | |
1200 | } | |
1201 | ||
1202 | /* Clear the "inserted" flag in all breakpoints and delete any breakpoints | |
1203 | which should go away between runs of the program. | |
1204 | ||
1205 | Plus other such housekeeping that has to be done for breakpoints | |
1206 | between runs. | |
1207 | ||
1208 | Note: this function gets called at the end of a run (by generic_mourn_inferior) | |
1209 | and when a run begins (by init_wait_for_inferior). */ | |
1210 | ||
1211 | ||
1212 | ||
1213 | void | |
1214 | breakpoint_init_inferior (context) | |
1215 | enum inf_context context; | |
1216 | { | |
1217 | register struct breakpoint *b, *temp; | |
1218 | static int warning_needed = 0; | |
1219 | ||
1220 | ALL_BREAKPOINTS_SAFE (b, temp) | |
1221 | { | |
1222 | b->inserted = 0; | |
1223 | ||
1224 | switch (b->type) | |
1225 | { | |
1226 | case bp_call_dummy: | |
1227 | case bp_watchpoint_scope: | |
1228 | ||
1229 | /* If the call dummy breakpoint is at the entry point it will | |
1230 | cause problems when the inferior is rerun, so we better | |
1231 | get rid of it. | |
1232 | ||
1233 | Also get rid of scope breakpoints. */ | |
1234 | delete_breakpoint (b); | |
1235 | break; | |
1236 | ||
1237 | case bp_watchpoint: | |
1238 | case bp_hardware_watchpoint: | |
1239 | case bp_read_watchpoint: | |
1240 | case bp_access_watchpoint: | |
1241 | ||
1242 | /* Likewise for watchpoints on local expressions. */ | |
1243 | if (b->exp_valid_block != NULL) | |
1244 | delete_breakpoint (b); | |
1245 | break; | |
1246 | default: | |
1247 | /* Likewise for exception catchpoints in dynamic-linked | |
1248 | executables where required */ | |
1249 | if (ep_is_exception_catchpoint (b) && | |
1250 | exception_catchpoints_are_fragile) | |
1251 | { | |
1252 | warning_needed = 1; | |
1253 | delete_breakpoint (b); | |
1254 | } | |
1255 | break; | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | if (exception_catchpoints_are_fragile) | |
1260 | exception_support_initialized = 0; | |
1261 | ||
1262 | /* Don't issue the warning unless it's really needed... */ | |
1263 | if (warning_needed && (context != inf_exited)) | |
1264 | { | |
1265 | warning ("Exception catchpoints from last run were deleted, you must reinsert them explicitly"); | |
1266 | warning_needed = 0; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. | |
1271 | When continuing from a location with a breakpoint, | |
1272 | we actually single step once before calling insert_breakpoints. */ | |
1273 | ||
1274 | int | |
1275 | breakpoint_here_p (pc) | |
1276 | CORE_ADDR pc; | |
1277 | { | |
1278 | register struct breakpoint *b; | |
1279 | ||
1280 | ALL_BREAKPOINTS (b) | |
1281 | if (b->enable == enabled | |
1282 | && b->enable != shlib_disabled | |
1283 | && b->enable != call_disabled | |
1284 | && b->address == pc) /* bp is enabled and matches pc */ | |
1285 | { | |
1286 | if (overlay_debugging && | |
1287 | section_is_overlay (b->section) && | |
1288 | !section_is_mapped (b->section)) | |
1289 | continue; /* unmapped overlay -- can't be a match */ | |
1290 | else | |
1291 | return 1; | |
1292 | } | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(), but it | |
1298 | only returns true if there is actually a breakpoint inserted at PC. */ | |
1299 | ||
1300 | int | |
1301 | breakpoint_inserted_here_p (pc) | |
1302 | CORE_ADDR pc; | |
1303 | { | |
1304 | register struct breakpoint *b; | |
1305 | ||
1306 | ALL_BREAKPOINTS (b) | |
1307 | if (b->inserted | |
1308 | && b->address == pc) /* bp is inserted and matches pc */ | |
1309 | { | |
1310 | if (overlay_debugging && | |
1311 | section_is_overlay (b->section) && | |
1312 | !section_is_mapped (b->section)) | |
1313 | continue; /* unmapped overlay -- can't be a match */ | |
1314 | else | |
1315 | return 1; | |
1316 | } | |
1317 | ||
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | /* Return nonzero if FRAME is a dummy frame. We can't use PC_IN_CALL_DUMMY | |
1322 | because figuring out the saved SP would take too much time, at least using | |
1323 | get_saved_register on the 68k. This means that for this function to | |
1324 | work right a port must use the bp_call_dummy breakpoint. */ | |
1325 | ||
1326 | int | |
1327 | frame_in_dummy (frame) | |
1328 | struct frame_info *frame; | |
1329 | { | |
1330 | #ifdef CALL_DUMMY | |
1331 | #ifdef USE_GENERIC_DUMMY_FRAMES | |
1332 | return generic_pc_in_call_dummy (frame->pc, frame->frame); | |
1333 | #else | |
1334 | struct breakpoint *b; | |
1335 | ||
1336 | ALL_BREAKPOINTS (b) | |
1337 | { | |
1338 | static ULONGEST dummy[] = CALL_DUMMY; | |
1339 | ||
1340 | if (b->type == bp_call_dummy | |
1341 | && b->frame == frame->frame | |
1342 | ||
1343 | /* We need to check the PC as well as the frame on the sparc, | |
1344 | for signals.exp in the testsuite. */ | |
1345 | && (frame->pc | |
1346 | >= (b->address | |
1347 | - sizeof (dummy) / sizeof (LONGEST) * REGISTER_SIZE)) | |
1348 | && frame->pc <= b->address) | |
1349 | return 1; | |
1350 | } | |
1351 | #endif /* GENERIC_DUMMY_FRAMES */ | |
1352 | #endif /* CALL_DUMMY */ | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | /* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC | |
1357 | is valid for process/thread PID. */ | |
1358 | ||
1359 | int | |
1360 | breakpoint_thread_match (pc, pid) | |
1361 | CORE_ADDR pc; | |
1362 | int pid; | |
1363 | { | |
1364 | struct breakpoint *b; | |
1365 | int thread; | |
1366 | ||
1367 | thread = pid_to_thread_id (pid); | |
1368 | ||
1369 | ALL_BREAKPOINTS (b) | |
1370 | if (b->enable != disabled | |
1371 | && b->enable != shlib_disabled | |
1372 | && b->enable != call_disabled | |
1373 | && b->address == pc | |
1374 | && (b->thread == -1 || b->thread == thread)) | |
1375 | { | |
1376 | if (overlay_debugging && | |
1377 | section_is_overlay (b->section) && | |
1378 | !section_is_mapped (b->section)) | |
1379 | continue; /* unmapped overlay -- can't be a match */ | |
1380 | else | |
1381 | return 1; | |
1382 | } | |
1383 | ||
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | \f | |
1388 | /* bpstat stuff. External routines' interfaces are documented | |
1389 | in breakpoint.h. */ | |
1390 | ||
1391 | int | |
1392 | ep_is_catchpoint (ep) | |
1393 | struct breakpoint * ep; | |
1394 | { | |
1395 | return | |
1396 | (ep->type == bp_catch_load) | |
1397 | || (ep->type == bp_catch_unload) | |
1398 | || (ep->type == bp_catch_fork) | |
1399 | || (ep->type == bp_catch_vfork) | |
1400 | || (ep->type == bp_catch_exec) | |
1401 | || (ep->type == bp_catch_catch) | |
1402 | || (ep->type == bp_catch_throw) | |
1403 | ||
1404 | ||
1405 | /* ??rehrauer: Add more kinds here, as are implemented... */ | |
1406 | ; | |
1407 | } | |
1408 | ||
1409 | int | |
1410 | ep_is_shlib_catchpoint (ep) | |
1411 | struct breakpoint * ep; | |
1412 | { | |
1413 | return | |
1414 | (ep->type == bp_catch_load) | |
1415 | || (ep->type == bp_catch_unload) | |
1416 | ; | |
1417 | } | |
1418 | ||
1419 | int | |
1420 | ep_is_exception_catchpoint (ep) | |
1421 | struct breakpoint * ep; | |
1422 | { | |
1423 | return | |
1424 | (ep->type == bp_catch_catch) | |
1425 | || (ep->type == bp_catch_throw) | |
1426 | ; | |
1427 | } | |
1428 | ||
1429 | /* Clear a bpstat so that it says we are not at any breakpoint. | |
1430 | Also free any storage that is part of a bpstat. */ | |
1431 | ||
1432 | void | |
1433 | bpstat_clear (bsp) | |
1434 | bpstat *bsp; | |
1435 | { | |
1436 | bpstat p; | |
1437 | bpstat q; | |
1438 | ||
1439 | if (bsp == 0) | |
1440 | return; | |
1441 | p = *bsp; | |
1442 | while (p != NULL) | |
1443 | { | |
1444 | q = p->next; | |
1445 | if (p->old_val != NULL) | |
1446 | value_free (p->old_val); | |
1447 | free ((PTR)p); | |
1448 | p = q; | |
1449 | } | |
1450 | *bsp = NULL; | |
1451 | } | |
1452 | ||
1453 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that | |
1454 | is part of the bpstat is copied as well. */ | |
1455 | ||
1456 | bpstat | |
1457 | bpstat_copy (bs) | |
1458 | bpstat bs; | |
1459 | { | |
1460 | bpstat p = NULL; | |
1461 | bpstat tmp; | |
1462 | bpstat retval = NULL; | |
1463 | ||
1464 | if (bs == NULL) | |
1465 | return bs; | |
1466 | ||
1467 | for (; bs != NULL; bs = bs->next) | |
1468 | { | |
1469 | tmp = (bpstat) xmalloc (sizeof (*tmp)); | |
1470 | memcpy (tmp, bs, sizeof (*tmp)); | |
1471 | if (p == NULL) | |
1472 | /* This is the first thing in the chain. */ | |
1473 | retval = tmp; | |
1474 | else | |
1475 | p->next = tmp; | |
1476 | p = tmp; | |
1477 | } | |
1478 | p->next = NULL; | |
1479 | return retval; | |
1480 | } | |
1481 | ||
1482 | /* Find the bpstat associated with this breakpoint */ | |
1483 | ||
1484 | bpstat | |
1485 | bpstat_find_breakpoint(bsp, breakpoint) | |
1486 | bpstat bsp; | |
1487 | struct breakpoint *breakpoint; | |
1488 | { | |
1489 | if (bsp == NULL) return NULL; | |
1490 | ||
1491 | for (;bsp != NULL; bsp = bsp->next) { | |
1492 | if (bsp->breakpoint_at == breakpoint) return bsp; | |
1493 | } | |
1494 | return NULL; | |
1495 | } | |
1496 | ||
1497 | /* Find a step_resume breakpoint associated with this bpstat. | |
1498 | (If there are multiple step_resume bp's on the list, this function | |
1499 | will arbitrarily pick one.) | |
1500 | ||
1501 | It is an error to use this function if BPSTAT doesn't contain a | |
1502 | step_resume breakpoint. | |
1503 | ||
1504 | See wait_for_inferior's use of this function. */ | |
1505 | struct breakpoint * | |
1506 | bpstat_find_step_resume_breakpoint (bsp) | |
1507 | bpstat bsp; | |
1508 | { | |
1509 | if (bsp == NULL) | |
1510 | error ("Internal error (bpstat_find_step_resume_breakpoint)"); | |
1511 | ||
1512 | for (; bsp != NULL; bsp = bsp->next) | |
1513 | { | |
1514 | if ((bsp->breakpoint_at != NULL) && | |
1515 | (bsp->breakpoint_at->type == bp_step_resume)) | |
1516 | return bsp->breakpoint_at; | |
1517 | } | |
1518 | ||
1519 | error ("Internal error (no step_resume breakpoint found)"); | |
1520 | } | |
1521 | ||
1522 | ||
1523 | /* Return the breakpoint number of the first breakpoint we are stopped | |
1524 | at. *BSP upon return is a bpstat which points to the remaining | |
1525 | breakpoints stopped at (but which is not guaranteed to be good for | |
1526 | anything but further calls to bpstat_num). | |
1527 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ | |
1528 | ||
1529 | int | |
1530 | bpstat_num (bsp) | |
1531 | bpstat *bsp; | |
1532 | { | |
1533 | struct breakpoint *b; | |
1534 | ||
1535 | if ((*bsp) == NULL) | |
1536 | return 0; /* No more breakpoint values */ | |
1537 | else | |
1538 | { | |
1539 | b = (*bsp)->breakpoint_at; | |
1540 | *bsp = (*bsp)->next; | |
1541 | if (b == NULL) | |
1542 | return -1; /* breakpoint that's been deleted since */ | |
1543 | else | |
1544 | return b->number; /* We have its number */ | |
1545 | } | |
1546 | } | |
1547 | ||
1548 | /* Modify BS so that the actions will not be performed. */ | |
1549 | ||
1550 | void | |
1551 | bpstat_clear_actions (bs) | |
1552 | bpstat bs; | |
1553 | { | |
1554 | for (; bs != NULL; bs = bs->next) | |
1555 | { | |
1556 | bs->commands = NULL; | |
1557 | if (bs->old_val != NULL) | |
1558 | { | |
1559 | value_free (bs->old_val); | |
1560 | bs->old_val = NULL; | |
1561 | } | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | /* Stub for cleaning up our state if we error-out of a breakpoint command */ | |
1566 | /* ARGSUSED */ | |
1567 | static void | |
1568 | cleanup_executing_breakpoints (ignore) | |
1569 | PTR ignore; | |
1570 | { | |
1571 | executing_breakpoint_commands = 0; | |
1572 | } | |
1573 | ||
1574 | /* Execute all the commands associated with all the breakpoints at this | |
1575 | location. Any of these commands could cause the process to proceed | |
1576 | beyond this point, etc. We look out for such changes by checking | |
1577 | the global "breakpoint_proceeded" after each command. */ | |
1578 | ||
1579 | void | |
1580 | bpstat_do_actions (bsp) | |
1581 | bpstat *bsp; | |
1582 | { | |
1583 | bpstat bs; | |
1584 | struct cleanup *old_chain; | |
1585 | struct command_line *cmd; | |
1586 | ||
1587 | /* Avoid endless recursion if a `source' command is contained | |
1588 | in bs->commands. */ | |
1589 | if (executing_breakpoint_commands) | |
1590 | return; | |
1591 | ||
1592 | executing_breakpoint_commands = 1; | |
1593 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); | |
1594 | ||
1595 | top: | |
1596 | /* Note that (as of this writing), our callers all appear to | |
1597 | be passing us the address of global stop_bpstat. And, if | |
1598 | our calls to execute_control_command cause the inferior to | |
1599 | proceed, that global (and hence, *bsp) will change. | |
1600 | ||
1601 | We must be careful to not touch *bsp unless the inferior | |
1602 | has not proceeded. */ | |
1603 | ||
1604 | /* This pointer will iterate over the list of bpstat's. */ | |
1605 | bs = *bsp; | |
1606 | ||
1607 | breakpoint_proceeded = 0; | |
1608 | for (; bs != NULL; bs = bs->next) | |
1609 | { | |
1610 | cmd = bs->commands; | |
1611 | while (cmd != NULL) | |
1612 | { | |
1613 | execute_control_command (cmd); | |
1614 | ||
1615 | if (breakpoint_proceeded) | |
1616 | break; | |
1617 | else | |
1618 | cmd = cmd->next; | |
1619 | } | |
1620 | if (breakpoint_proceeded) | |
1621 | /* The inferior is proceeded by the command; bomb out now. | |
1622 | The bpstat chain has been blown away by wait_for_inferior. | |
1623 | But since execution has stopped again, there is a new bpstat | |
1624 | to look at, so start over. */ | |
1625 | goto top; | |
1626 | else | |
1627 | bs->commands = NULL; | |
1628 | } | |
1629 | ||
1630 | executing_breakpoint_commands = 0; | |
1631 | discard_cleanups (old_chain); | |
1632 | } | |
1633 | ||
1634 | /* This is the normal print_it function for a bpstat. In the future, | |
1635 | much of this logic could (should?) be moved to bpstat_stop_status, | |
1636 | by having it set different print_it functions. | |
1637 | ||
1638 | Current scheme: When we stop, bpstat_print() is called. | |
1639 | It loops through the bpstat list of things causing this stop, | |
1640 | calling the print_it function for each one. The default | |
1641 | print_it function, used for breakpoints, is print_it_normal(). | |
1642 | (Also see print_it_noop() and print_it_done()). | |
1643 | ||
1644 | Return values from this routine (used by bpstat_print() to | |
1645 | decide what to do): | |
1646 | 1: Means we printed something, and we do *not* desire that | |
1647 | something to be followed by a location. | |
1648 | 0: Means we printed something, and we *do* desire that | |
1649 | something to be followed by a location. | |
1650 | -1: Means we printed nothing. */ | |
1651 | ||
1652 | static int | |
1653 | print_it_normal (bs) | |
1654 | bpstat bs; | |
1655 | { | |
1656 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint | |
1657 | which has since been deleted. */ | |
1658 | if (bs->breakpoint_at == NULL | |
1659 | || (bs->breakpoint_at->type != bp_breakpoint | |
1660 | && bs->breakpoint_at->type != bp_catch_load | |
1661 | && bs->breakpoint_at->type != bp_catch_unload | |
1662 | && bs->breakpoint_at->type != bp_catch_fork | |
1663 | && bs->breakpoint_at->type != bp_catch_vfork | |
1664 | && bs->breakpoint_at->type != bp_catch_exec | |
1665 | && bs->breakpoint_at->type != bp_catch_catch | |
1666 | && bs->breakpoint_at->type != bp_catch_throw | |
1667 | && bs->breakpoint_at->type != bp_hardware_breakpoint | |
1668 | && bs->breakpoint_at->type != bp_watchpoint | |
1669 | && bs->breakpoint_at->type != bp_read_watchpoint | |
1670 | && bs->breakpoint_at->type != bp_access_watchpoint | |
1671 | && bs->breakpoint_at->type != bp_hardware_watchpoint)) | |
1672 | return -1; | |
1673 | ||
1674 | if (ep_is_shlib_catchpoint (bs->breakpoint_at)) | |
1675 | { | |
1676 | annotate_catchpoint (bs->breakpoint_at->number); | |
1677 | printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); | |
1678 | if (bs->breakpoint_at->type == bp_catch_load) | |
1679 | printf_filtered ("loaded"); | |
1680 | else if (bs->breakpoint_at->type == bp_catch_unload) | |
1681 | printf_filtered ("unloaded"); | |
1682 | printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); | |
1683 | return 0; | |
1684 | } | |
1685 | else if (bs->breakpoint_at->type == bp_catch_fork || | |
1686 | bs->breakpoint_at->type == bp_catch_vfork) | |
1687 | { | |
1688 | annotate_catchpoint (bs->breakpoint_at->number); | |
1689 | printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); | |
1690 | if (bs->breakpoint_at->type == bp_catch_fork) | |
1691 | printf_filtered ("forked"); | |
1692 | else if (bs->breakpoint_at->type == bp_catch_vfork) | |
1693 | printf_filtered ("vforked"); | |
1694 | printf_filtered (" process %d), ", bs->breakpoint_at->forked_inferior_pid); | |
1695 | return 0; | |
1696 | } | |
1697 | else if (bs->breakpoint_at->type == bp_catch_exec) | |
1698 | { | |
1699 | annotate_catchpoint (bs->breakpoint_at->number); | |
1700 | printf_filtered ("\nCatchpoint %d (exec'd %s), ", | |
1701 | bs->breakpoint_at->number, | |
1702 | bs->breakpoint_at->exec_pathname); | |
1703 | return 0; | |
1704 | } | |
1705 | else if (bs->breakpoint_at->type == bp_catch_catch) | |
1706 | { | |
1707 | if (current_exception_event && (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH)) | |
1708 | { | |
1709 | annotate_catchpoint (bs->breakpoint_at->number); | |
1710 | printf_filtered ("\nCatchpoint %d (exception caught), ", bs->breakpoint_at->number); | |
1711 | printf_filtered ("throw location "); | |
1712 | if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE) | |
1713 | printf_filtered ("%s:%d", | |
1714 | CURRENT_EXCEPTION_THROW_FILE, | |
1715 | CURRENT_EXCEPTION_THROW_LINE); | |
1716 | else | |
1717 | printf_filtered ("unknown"); | |
1718 | ||
1719 | printf_filtered (", catch location "); | |
1720 | if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE) | |
1721 | printf_filtered ("%s:%d", | |
1722 | CURRENT_EXCEPTION_CATCH_FILE, | |
1723 | CURRENT_EXCEPTION_CATCH_LINE); | |
1724 | else | |
1725 | printf_filtered ("unknown"); | |
1726 | ||
1727 | printf_filtered ("\n"); | |
1728 | return 1; /* don't bother to print location frame info */ | |
1729 | } | |
1730 | else | |
1731 | { | |
1732 | return -1; /* really throw, some other bpstat will handle it */ | |
1733 | } | |
1734 | } | |
1735 | else if (bs->breakpoint_at->type == bp_catch_throw) | |
1736 | { | |
1737 | if (current_exception_event && (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW)) | |
1738 | { | |
1739 | annotate_catchpoint (bs->breakpoint_at->number); | |
1740 | printf_filtered ("\nCatchpoint %d (exception thrown), ", bs->breakpoint_at->number); | |
1741 | printf_filtered ("throw location "); | |
1742 | if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE) | |
1743 | printf_filtered ("%s:%d", | |
1744 | CURRENT_EXCEPTION_THROW_FILE, | |
1745 | CURRENT_EXCEPTION_THROW_LINE); | |
1746 | else | |
1747 | printf_filtered ("unknown"); | |
1748 | ||
1749 | printf_filtered (", catch location "); | |
1750 | if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE) | |
1751 | printf_filtered ("%s:%d", | |
1752 | CURRENT_EXCEPTION_CATCH_FILE, | |
1753 | CURRENT_EXCEPTION_CATCH_LINE); | |
1754 | else | |
1755 | printf_filtered ("unknown"); | |
1756 | ||
1757 | printf_filtered ("\n"); | |
1758 | return 1; /* don't bother to print location frame info */ | |
1759 | } | |
1760 | else | |
1761 | { | |
1762 | return -1; /* really catch, some other bpstat willhandle it */ | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | else if (bs->breakpoint_at->type == bp_breakpoint || | |
1767 | bs->breakpoint_at->type == bp_hardware_breakpoint) | |
1768 | { | |
1769 | /* I think the user probably only wants to see one breakpoint | |
1770 | number, not all of them. */ | |
1771 | annotate_breakpoint (bs->breakpoint_at->number); | |
1772 | printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); | |
1773 | return 0; | |
1774 | } | |
1775 | else if ((bs->old_val != NULL) && | |
1776 | (bs->breakpoint_at->type == bp_watchpoint || | |
1777 | bs->breakpoint_at->type == bp_access_watchpoint || | |
1778 | bs->breakpoint_at->type == bp_hardware_watchpoint)) | |
1779 | { | |
1780 | annotate_watchpoint (bs->breakpoint_at->number); | |
1781 | mention (bs->breakpoint_at); | |
1782 | printf_filtered ("\nOld value = "); | |
1783 | value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default); | |
1784 | printf_filtered ("\nNew value = "); | |
1785 | value_print (bs->breakpoint_at->val, gdb_stdout, 0, | |
1786 | Val_pretty_default); | |
1787 | printf_filtered ("\n"); | |
1788 | value_free (bs->old_val); | |
1789 | bs->old_val = NULL; | |
1790 | /* More than one watchpoint may have been triggered. */ | |
1791 | return -1; | |
1792 | } | |
1793 | else if (bs->breakpoint_at->type == bp_access_watchpoint || | |
1794 | bs->breakpoint_at->type == bp_read_watchpoint) | |
1795 | { | |
1796 | mention (bs->breakpoint_at); | |
1797 | printf_filtered ("\nValue = "); | |
1798 | value_print (bs->breakpoint_at->val, gdb_stdout, 0, | |
1799 | Val_pretty_default); | |
1800 | printf_filtered ("\n"); | |
1801 | return -1; | |
1802 | } | |
1803 | /* We can't deal with it. Maybe another member of the bpstat chain can. */ | |
1804 | return -1; | |
1805 | } | |
1806 | ||
1807 | /* Print a message indicating what happened. | |
1808 | This is called from normal_stop(). | |
1809 | The input to this routine is the head of the bpstat list - a list | |
1810 | of the eventpoints that caused this stop. | |
1811 | This routine calls the "print_it" routine(s) associated | |
1812 | with these eventpoints. This will print (for example) | |
1813 | the "Breakpoint n," part of the output. | |
1814 | The return value of this routine is one of: | |
1815 | ||
1816 | -1: Means we printed nothing | |
1817 | 0: Means we printed something, and expect subsequent | |
1818 | code to print the location. An example is | |
1819 | "Breakpoint 1, " which should be followed by | |
1820 | the location. | |
1821 | 1 : Means we printed something, but there is no need | |
1822 | to also print the location part of the message. | |
1823 | An example is the catch/throw messages, which | |
1824 | don't require a location appended to the end. */ | |
1825 | ||
1826 | int | |
1827 | bpstat_print (bs) | |
1828 | bpstat bs; | |
1829 | { | |
1830 | int val; | |
1831 | ||
1832 | if (bs == NULL) | |
1833 | return -1; | |
1834 | ||
1835 | val = (*bs->print_it) (bs); | |
1836 | if (val >= 0) | |
1837 | return val; | |
1838 | ||
1839 | /* Maybe another breakpoint in the chain caused us to stop. | |
1840 | (Currently all watchpoints go on the bpstat whether hit or | |
1841 | not. That probably could (should) be changed, provided care is taken | |
1842 | with respect to bpstat_explains_signal). */ | |
1843 | if (bs->next) | |
1844 | return bpstat_print (bs->next); | |
1845 | ||
1846 | /* We reached the end of the chain without printing anything. */ | |
1847 | return -1; | |
1848 | } | |
1849 | ||
1850 | /* Evaluate the expression EXP and return 1 if value is zero. | |
1851 | This is used inside a catch_errors to evaluate the breakpoint condition. | |
1852 | The argument is a "struct expression *" that has been cast to char * to | |
1853 | make it pass through catch_errors. */ | |
1854 | ||
1855 | static int | |
1856 | breakpoint_cond_eval (exp) | |
1857 | PTR exp; | |
1858 | { | |
1859 | value_ptr mark = value_mark (); | |
1860 | int i = !value_true (evaluate_expression ((struct expression *)exp)); | |
1861 | value_free_to_mark (mark); | |
1862 | return i; | |
1863 | } | |
1864 | ||
1865 | /* Allocate a new bpstat and chain it to the current one. */ | |
1866 | ||
1867 | static bpstat | |
1868 | bpstat_alloc (b, cbs) | |
1869 | register struct breakpoint *b; | |
1870 | bpstat cbs; /* Current "bs" value */ | |
1871 | { | |
1872 | bpstat bs; | |
1873 | ||
1874 | bs = (bpstat) xmalloc (sizeof (*bs)); | |
1875 | cbs->next = bs; | |
1876 | bs->breakpoint_at = b; | |
1877 | /* If the condition is false, etc., don't do the commands. */ | |
1878 | bs->commands = NULL; | |
1879 | bs->old_val = NULL; | |
1880 | bs->print_it = print_it_normal; | |
1881 | return bs; | |
1882 | } | |
1883 | \f | |
1884 | /* Possible return values for watchpoint_check (this can't be an enum | |
1885 | because of check_errors). */ | |
1886 | /* The watchpoint has been deleted. */ | |
1887 | #define WP_DELETED 1 | |
1888 | /* The value has changed. */ | |
1889 | #define WP_VALUE_CHANGED 2 | |
1890 | /* The value has not changed. */ | |
1891 | #define WP_VALUE_NOT_CHANGED 3 | |
1892 | ||
1893 | #define BP_TEMPFLAG 1 | |
1894 | #define BP_HARDWAREFLAG 2 | |
1895 | ||
1896 | /* Check watchpoint condition. */ | |
1897 | ||
1898 | static int | |
1899 | watchpoint_check (p) | |
1900 | PTR p; | |
1901 | { | |
1902 | bpstat bs = (bpstat) p; | |
1903 | struct breakpoint *b; | |
1904 | struct frame_info *fr; | |
1905 | int within_current_scope; | |
1906 | ||
1907 | b = bs->breakpoint_at; | |
1908 | ||
1909 | if (b->exp_valid_block == NULL) | |
1910 | within_current_scope = 1; | |
1911 | else | |
1912 | { | |
1913 | /* There is no current frame at this moment. If we're going to have | |
1914 | any chance of handling watchpoints on local variables, we'll need | |
1915 | the frame chain (so we can determine if we're in scope). */ | |
1916 | reinit_frame_cache(); | |
1917 | fr = find_frame_addr_in_frame_chain (b->watchpoint_frame); | |
1918 | within_current_scope = (fr != NULL); | |
1919 | if (within_current_scope) | |
1920 | /* If we end up stopping, the current frame will get selected | |
1921 | in normal_stop. So this call to select_frame won't affect | |
1922 | the user. */ | |
1923 | select_frame (fr, -1); | |
1924 | } | |
1925 | ||
1926 | if (within_current_scope) | |
1927 | { | |
1928 | /* We use value_{,free_to_}mark because it could be a | |
1929 | *long* time before we return to the command level and | |
1930 | call free_all_values. We can't call free_all_values because | |
1931 | we might be in the middle of evaluating a function call. */ | |
1932 | ||
1933 | value_ptr mark = value_mark (); | |
1934 | value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp); | |
1935 | if (!value_equal (b->val, new_val)) | |
1936 | { | |
1937 | release_value (new_val); | |
1938 | value_free_to_mark (mark); | |
1939 | bs->old_val = b->val; | |
1940 | b->val = new_val; | |
1941 | /* We will stop here */ | |
1942 | return WP_VALUE_CHANGED; | |
1943 | } | |
1944 | else | |
1945 | { | |
1946 | /* Nothing changed, don't do anything. */ | |
1947 | value_free_to_mark (mark); | |
1948 | /* We won't stop here */ | |
1949 | return WP_VALUE_NOT_CHANGED; | |
1950 | } | |
1951 | } | |
1952 | else | |
1953 | { | |
1954 | /* This seems like the only logical thing to do because | |
1955 | if we temporarily ignored the watchpoint, then when | |
1956 | we reenter the block in which it is valid it contains | |
1957 | garbage (in the case of a function, it may have two | |
1958 | garbage values, one before and one after the prologue). | |
1959 | So we can't even detect the first assignment to it and | |
1960 | watch after that (since the garbage may or may not equal | |
1961 | the first value assigned). */ | |
1962 | printf_filtered ("\ | |
1963 | Watchpoint %d deleted because the program has left the block in\n\ | |
1964 | which its expression is valid.\n", bs->breakpoint_at->number); | |
1965 | if (b->related_breakpoint) | |
1966 | b->related_breakpoint->disposition = del_at_next_stop; | |
1967 | b->disposition = del_at_next_stop; | |
1968 | ||
1969 | return WP_DELETED; | |
1970 | } | |
1971 | } | |
1972 | ||
1973 | /* This is used when everything which needs to be printed has | |
1974 | already been printed. But we still want to print the frame. */ | |
1975 | ||
1976 | /* Background: When we stop, bpstat_print() is called. | |
1977 | It loops through the bpstat list of things causing this stop, | |
1978 | calling the print_it function for each one. The default | |
1979 | print_it function, used for breakpoints, is print_it_normal(). | |
1980 | Also see print_it_noop() and print_it_done() are the other | |
1981 | two possibilities. See comments in bpstat_print() and | |
1982 | in header of print_it_normal() for more detail. */ | |
1983 | ||
1984 | static int | |
1985 | print_it_done (bs) | |
1986 | bpstat bs; | |
1987 | { | |
1988 | return 0; | |
1989 | } | |
1990 | ||
1991 | /* This is used when nothing should be printed for this bpstat entry. */ | |
1992 | /* Background: When we stop, bpstat_print() is called. | |
1993 | It loops through the bpstat list of things causing this stop, | |
1994 | calling the print_it function for each one. The default | |
1995 | print_it function, used for breakpoints, is print_it_normal(). | |
1996 | Also see print_it_noop() and print_it_done() are the other | |
1997 | two possibilities. See comments in bpstat_print() and | |
1998 | in header of print_it_normal() for more detail. */ | |
1999 | ||
2000 | static int | |
2001 | print_it_noop (bs) | |
2002 | bpstat bs; | |
2003 | { | |
2004 | return -1; | |
2005 | } | |
2006 | ||
2007 | /* Get a bpstat associated with having just stopped at address *PC | |
2008 | and frame address CORE_ADDRESS. Update *PC to point at the | |
2009 | breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero | |
2010 | if this is known to not be a real breakpoint (it could still be a | |
2011 | watchpoint, though). */ | |
2012 | ||
2013 | /* Determine whether we stopped at a breakpoint, etc, or whether we | |
2014 | don't understand this stop. Result is a chain of bpstat's such that: | |
2015 | ||
2016 | if we don't understand the stop, the result is a null pointer. | |
2017 | ||
2018 | if we understand why we stopped, the result is not null. | |
2019 | ||
2020 | Each element of the chain refers to a particular breakpoint or | |
2021 | watchpoint at which we have stopped. (We may have stopped for | |
2022 | several reasons concurrently.) | |
2023 | ||
2024 | Each element of the chain has valid next, breakpoint_at, | |
2025 | commands, FIXME??? fields. */ | |
2026 | ||
2027 | bpstat | |
2028 | bpstat_stop_status (pc, not_a_breakpoint) | |
2029 | CORE_ADDR *pc; | |
2030 | int not_a_breakpoint; | |
2031 | { | |
2032 | register struct breakpoint *b, *temp; | |
2033 | CORE_ADDR bp_addr; | |
2034 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ | |
2035 | int real_breakpoint = 0; | |
2036 | /* Root of the chain of bpstat's */ | |
2037 | struct bpstats root_bs[1]; | |
2038 | /* Pointer to the last thing in the chain currently. */ | |
2039 | bpstat bs = root_bs; | |
2040 | static char message1[] = | |
2041 | "Error evaluating expression for watchpoint %d\n"; | |
2042 | char message[sizeof (message1) + 30 /* slop */]; | |
2043 | ||
2044 | /* Get the address where the breakpoint would have been. */ | |
2045 | bp_addr = *pc - DECR_PC_AFTER_BREAK; | |
2046 | ||
2047 | ALL_BREAKPOINTS_SAFE (b, temp) | |
2048 | { | |
2049 | if (b->enable == disabled | |
2050 | || b->enable == shlib_disabled | |
2051 | || b->enable == call_disabled) | |
2052 | continue; | |
2053 | ||
2054 | if (b->type != bp_watchpoint | |
2055 | && b->type != bp_hardware_watchpoint | |
2056 | && b->type != bp_read_watchpoint | |
2057 | && b->type != bp_access_watchpoint | |
2058 | && b->type != bp_hardware_breakpoint | |
2059 | && b->type != bp_catch_fork | |
2060 | && b->type != bp_catch_vfork | |
2061 | && b->type != bp_catch_exec | |
2062 | && b->type != bp_catch_catch | |
2063 | && b->type != bp_catch_throw) /* a non-watchpoint bp */ | |
2064 | if (b->address != bp_addr || /* address doesn't match or */ | |
2065 | (overlay_debugging && /* overlay doesn't match */ | |
2066 | section_is_overlay (b->section) && | |
2067 | !section_is_mapped (b->section))) | |
2068 | continue; | |
2069 | ||
2070 | if (b->type == bp_hardware_breakpoint | |
2071 | && b->address != (*pc - DECR_PC_AFTER_HW_BREAK)) | |
2072 | continue; | |
2073 | ||
2074 | if (b->type != bp_watchpoint | |
2075 | && b->type != bp_hardware_watchpoint | |
2076 | && b->type != bp_read_watchpoint | |
2077 | && b->type != bp_access_watchpoint | |
2078 | && not_a_breakpoint) | |
2079 | continue; | |
2080 | ||
2081 | /* Is this a catchpoint of a load or unload? If so, did we | |
2082 | get a load or unload of the specified library? If not, | |
2083 | ignore it. */ | |
2084 | if ((b->type == bp_catch_load) | |
2085 | #if defined(SOLIB_HAVE_LOAD_EVENT) | |
2086 | && (!SOLIB_HAVE_LOAD_EVENT(inferior_pid) | |
2087 | || ((b->dll_pathname != NULL) | |
2088 | && (strcmp (b->dll_pathname, SOLIB_LOADED_LIBRARY_PATHNAME(inferior_pid)) != 0))) | |
2089 | #endif | |
2090 | ) | |
2091 | continue; | |
2092 | ||
2093 | if ((b->type == bp_catch_unload) | |
2094 | #if defined(SOLIB_HAVE_UNLOAD_EVENT) | |
2095 | && (!SOLIB_HAVE_UNLOAD_EVENT(inferior_pid) | |
2096 | || ((b->dll_pathname != NULL) | |
2097 | && (strcmp (b->dll_pathname, SOLIB_UNLOADED_LIBRARY_PATHNAME(inferior_pid)) != 0))) | |
2098 | #endif | |
2099 | ) | |
2100 | continue; | |
2101 | ||
2102 | if ((b->type == bp_catch_fork) | |
2103 | && ! target_has_forked (inferior_pid, &b->forked_inferior_pid)) | |
2104 | continue; | |
2105 | ||
2106 | if ((b->type == bp_catch_vfork) | |
2107 | && ! target_has_vforked (inferior_pid, &b->forked_inferior_pid)) | |
2108 | continue; | |
2109 | ||
2110 | if ((b->type == bp_catch_exec) | |
2111 | && ! target_has_execd (inferior_pid, &b->exec_pathname)) | |
2112 | continue; | |
2113 | ||
2114 | if (ep_is_exception_catchpoint (b) && | |
2115 | !(current_exception_event = target_get_current_exception_event ())) | |
2116 | continue; | |
2117 | ||
2118 | /* Come here if it's a watchpoint, or if the break address matches */ | |
2119 | ||
2120 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ | |
2121 | ||
2122 | /* Watchpoints may change this, if not found to have triggered. */ | |
2123 | bs->stop = 1; | |
2124 | bs->print = 1; | |
2125 | ||
2126 | sprintf (message, message1, b->number); | |
2127 | if (b->type == bp_watchpoint || b->type == bp_hardware_watchpoint) | |
2128 | { | |
2129 | switch (catch_errors (watchpoint_check, bs, message, RETURN_MASK_ALL)) | |
2130 | { | |
2131 | case WP_DELETED: | |
2132 | /* We've already printed what needs to be printed. */ | |
2133 | bs->print_it = print_it_done; | |
2134 | /* Stop. */ | |
2135 | break; | |
2136 | case WP_VALUE_CHANGED: | |
2137 | /* Stop. */ | |
2138 | ++(b->hit_count); | |
2139 | break; | |
2140 | case WP_VALUE_NOT_CHANGED: | |
2141 | /* Don't stop. */ | |
2142 | bs->print_it = print_it_noop; | |
2143 | bs->stop = 0; | |
2144 | /* Don't consider this a hit. */ | |
2145 | --(b->hit_count); | |
2146 | continue; | |
2147 | default: | |
2148 | /* Can't happen. */ | |
2149 | /* FALLTHROUGH */ | |
2150 | case 0: | |
2151 | /* Error from catch_errors. */ | |
2152 | printf_filtered ("Watchpoint %d deleted.\n", b->number); | |
2153 | if (b->related_breakpoint) | |
2154 | b->related_breakpoint->disposition = del_at_next_stop; | |
2155 | b->disposition = del_at_next_stop; | |
2156 | /* We've already printed what needs to be printed. */ | |
2157 | bs->print_it = print_it_done; | |
2158 | ||
2159 | /* Stop. */ | |
2160 | break; | |
2161 | } | |
2162 | } | |
2163 | else if (b->type == bp_read_watchpoint || b->type == bp_access_watchpoint) | |
2164 | { | |
2165 | CORE_ADDR addr; | |
2166 | value_ptr v; | |
2167 | int found = 0; | |
2168 | ||
2169 | addr = target_stopped_data_address(); | |
2170 | if (addr == 0) continue; | |
2171 | for (v = b->val_chain; v; v = v->next) | |
2172 | { | |
2173 | if (v->lval == lval_memory) | |
2174 | { | |
2175 | CORE_ADDR vaddr; | |
2176 | ||
2177 | vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); | |
2178 | if (addr == vaddr) | |
2179 | found = 1; | |
2180 | } | |
2181 | } | |
2182 | if (found) | |
2183 | switch (catch_errors (watchpoint_check, bs, message, RETURN_MASK_ALL)) | |
2184 | { | |
2185 | case WP_DELETED: | |
2186 | /* We've already printed what needs to be printed. */ | |
2187 | bs->print_it = print_it_done; | |
2188 | /* Stop. */ | |
2189 | break; | |
2190 | case WP_VALUE_CHANGED: | |
2191 | case WP_VALUE_NOT_CHANGED: | |
2192 | /* Stop. */ | |
2193 | ++(b->hit_count); | |
2194 | break; | |
2195 | default: | |
2196 | /* Can't happen. */ | |
2197 | case 0: | |
2198 | /* Error from catch_errors. */ | |
2199 | printf_filtered ("Watchpoint %d deleted.\n", b->number); | |
2200 | if (b->related_breakpoint) | |
2201 | b->related_breakpoint->disposition = del_at_next_stop; | |
2202 | b->disposition = del_at_next_stop; | |
2203 | /* We've already printed what needs to be printed. */ | |
2204 | bs->print_it = print_it_done; | |
2205 | break; | |
2206 | } | |
2207 | } | |
2208 | else | |
2209 | { | |
2210 | /* By definition, an encountered breakpoint is a triggered | |
2211 | breakpoint. */ | |
2212 | ++(b->hit_count); | |
2213 | ||
2214 | real_breakpoint = 1; | |
2215 | } | |
2216 | ||
2217 | if (b->frame && b->frame != (get_current_frame ())->frame && | |
2218 | (b->type == bp_step_resume && | |
2219 | (INNER_THAN (get_current_frame ()->frame, b->frame)))) | |
2220 | bs->stop = 0; | |
2221 | else | |
2222 | { | |
2223 | int value_is_zero = 0; | |
2224 | ||
2225 | if (b->cond) | |
2226 | { | |
2227 | /* Need to select the frame, with all that implies | |
2228 | so that the conditions will have the right context. */ | |
2229 | select_frame (get_current_frame (), 0); | |
2230 | value_is_zero | |
2231 | = catch_errors (breakpoint_cond_eval, (b->cond), | |
2232 | "Error in testing breakpoint condition:\n", | |
2233 | RETURN_MASK_ALL); | |
2234 | /* FIXME-someday, should give breakpoint # */ | |
2235 | free_all_values (); | |
2236 | } | |
2237 | if (b->cond && value_is_zero) | |
2238 | { | |
2239 | bs->stop = 0; | |
2240 | /* Don't consider this a hit. */ | |
2241 | --(b->hit_count); | |
2242 | } | |
2243 | else if (b->ignore_count > 0) | |
2244 | { | |
2245 | b->ignore_count--; | |
2246 | bs->stop = 0; | |
2247 | } | |
2248 | else | |
2249 | { | |
2250 | /* We will stop here */ | |
2251 | if (b->disposition == disable) | |
2252 | b->enable = disabled; | |
2253 | bs->commands = b->commands; | |
2254 | if (b->silent) | |
2255 | bs->print = 0; | |
2256 | if (bs->commands && | |
2257 | (STREQ ("silent", bs->commands->line) || | |
2258 | (xdb_commands && STREQ ("Q", bs->commands->line)))) | |
2259 | { | |
2260 | bs->commands = bs->commands->next; | |
2261 | bs->print = 0; | |
2262 | } | |
2263 | } | |
2264 | } | |
2265 | /* Print nothing for this entry if we dont stop or if we dont print. */ | |
2266 | if (bs->stop == 0 || bs->print == 0) | |
2267 | bs->print_it = print_it_noop; | |
2268 | } | |
2269 | ||
2270 | bs->next = NULL; /* Terminate the chain */ | |
2271 | bs = root_bs->next; /* Re-grab the head of the chain */ | |
2272 | ||
2273 | if (real_breakpoint && bs) | |
2274 | { | |
2275 | if (bs->breakpoint_at->type == bp_hardware_breakpoint) | |
2276 | { | |
2277 | if (DECR_PC_AFTER_HW_BREAK != 0) | |
2278 | { | |
2279 | *pc = *pc - DECR_PC_AFTER_HW_BREAK; | |
2280 | write_pc (*pc); | |
2281 | } | |
2282 | } | |
2283 | else | |
2284 | { | |
2285 | if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs) | |
2286 | { | |
2287 | *pc = bp_addr; | |
2288 | #if defined (SHIFT_INST_REGS) | |
2289 | SHIFT_INST_REGS(); | |
2290 | #else /* No SHIFT_INST_REGS. */ | |
2291 | write_pc (bp_addr); | |
2292 | #endif /* No SHIFT_INST_REGS. */ | |
2293 | } | |
2294 | } | |
2295 | } | |
2296 | ||
2297 | /* The value of a hardware watchpoint hasn't changed, but the | |
2298 | intermediate memory locations we are watching may have. */ | |
2299 | if (bs && ! bs->stop && | |
2300 | (bs->breakpoint_at->type == bp_hardware_watchpoint || | |
2301 | bs->breakpoint_at->type == bp_read_watchpoint || | |
2302 | bs->breakpoint_at->type == bp_access_watchpoint)) | |
2303 | { | |
2304 | remove_breakpoints (); | |
2305 | insert_breakpoints (); | |
2306 | } | |
2307 | return bs; | |
2308 | } | |
2309 | \f | |
2310 | /* Tell what to do about this bpstat. */ | |
2311 | struct bpstat_what | |
2312 | bpstat_what (bs) | |
2313 | bpstat bs; | |
2314 | { | |
2315 | /* Classify each bpstat as one of the following. */ | |
2316 | enum class { | |
2317 | /* This bpstat element has no effect on the main_action. */ | |
2318 | no_effect = 0, | |
2319 | ||
2320 | /* There was a watchpoint, stop but don't print. */ | |
2321 | wp_silent, | |
2322 | ||
2323 | /* There was a watchpoint, stop and print. */ | |
2324 | wp_noisy, | |
2325 | ||
2326 | /* There was a breakpoint but we're not stopping. */ | |
2327 | bp_nostop, | |
2328 | ||
2329 | /* There was a breakpoint, stop but don't print. */ | |
2330 | bp_silent, | |
2331 | ||
2332 | /* There was a breakpoint, stop and print. */ | |
2333 | bp_noisy, | |
2334 | ||
2335 | /* We hit the longjmp breakpoint. */ | |
2336 | long_jump, | |
2337 | ||
2338 | /* We hit the longjmp_resume breakpoint. */ | |
2339 | long_resume, | |
2340 | ||
2341 | /* We hit the step_resume breakpoint. */ | |
2342 | step_resume, | |
2343 | ||
2344 | /* We hit the through_sigtramp breakpoint. */ | |
2345 | through_sig, | |
2346 | ||
2347 | /* We hit the shared library event breakpoint. */ | |
2348 | shlib_event, | |
2349 | ||
2350 | /* We caught a shared library event. */ | |
2351 | catch_shlib_event, | |
2352 | ||
2353 | /* This is just used to count how many enums there are. */ | |
2354 | class_last | |
2355 | }; | |
2356 | ||
2357 | /* Here is the table which drives this routine. So that we can | |
2358 | format it pretty, we define some abbreviations for the | |
2359 | enum bpstat_what codes. */ | |
2360 | #define kc BPSTAT_WHAT_KEEP_CHECKING | |
2361 | #define ss BPSTAT_WHAT_STOP_SILENT | |
2362 | #define sn BPSTAT_WHAT_STOP_NOISY | |
2363 | #define sgl BPSTAT_WHAT_SINGLE | |
2364 | #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME | |
2365 | #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME | |
2366 | #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE | |
2367 | #define sr BPSTAT_WHAT_STEP_RESUME | |
2368 | #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP | |
2369 | #define shl BPSTAT_WHAT_CHECK_SHLIBS | |
2370 | #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK | |
2371 | ||
2372 | /* "Can't happen." Might want to print an error message. | |
2373 | abort() is not out of the question, but chances are GDB is just | |
2374 | a bit confused, not unusable. */ | |
2375 | #define err BPSTAT_WHAT_STOP_NOISY | |
2376 | ||
2377 | /* Given an old action and a class, come up with a new action. */ | |
2378 | /* One interesting property of this table is that wp_silent is the same | |
2379 | as bp_silent and wp_noisy is the same as bp_noisy. That is because | |
2380 | after stopping, the check for whether to step over a breakpoint | |
2381 | (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without | |
2382 | reference to how we stopped. We retain separate wp_silent and bp_silent | |
2383 | codes in case we want to change that someday. */ | |
2384 | ||
2385 | /* step_resume entries: a step resume breakpoint overrides another | |
2386 | breakpoint of signal handling (see comment in wait_for_inferior | |
2387 | at first IN_SIGTRAMP where we set the step_resume breakpoint). */ | |
2388 | /* We handle the through_sigtramp_breakpoint the same way; having both | |
2389 | one of those and a step_resume_breakpoint is probably very rare (?). */ | |
2390 | ||
2391 | static const enum bpstat_what_main_action | |
2392 | table[(int)class_last][(int)BPSTAT_WHAT_LAST] = | |
2393 | { | |
2394 | /* old action */ | |
2395 | /* kc ss sn sgl slr clr clrs sr ts shl shlr | |
2396 | */ | |
2397 | /*no_effect*/ {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr}, | |
2398 | /*wp_silent*/ {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr}, | |
2399 | /*wp_noisy*/ {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr}, | |
2400 | /*bp_nostop*/ {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr}, | |
2401 | /*bp_silent*/ {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr}, | |
2402 | /*bp_noisy*/ {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr}, | |
2403 | /*long_jump*/ {slr, ss, sn, slr, err, err, err, sr, ts, shl, shlr}, | |
2404 | /*long_resume*/ {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr}, | |
2405 | /*step_resume*/ {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr}, | |
2406 | /*through_sig*/ {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr}, | |
2407 | /*shlib*/ {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr}, | |
2408 | /*catch_shlib*/ {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr} | |
2409 | }; | |
2410 | ||
2411 | #undef kc | |
2412 | #undef ss | |
2413 | #undef sn | |
2414 | #undef sgl | |
2415 | #undef slr | |
2416 | #undef clr | |
2417 | #undef clrs | |
2418 | #undef err | |
2419 | #undef sr | |
2420 | #undef ts | |
2421 | #undef shl | |
2422 | #undef shlr | |
2423 | enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; | |
2424 | struct bpstat_what retval; | |
2425 | ||
2426 | retval.call_dummy = 0; | |
2427 | for (; bs != NULL; bs = bs->next) | |
2428 | { | |
2429 | enum class bs_class = no_effect; | |
2430 | if (bs->breakpoint_at == NULL) | |
2431 | /* I suspect this can happen if it was a momentary breakpoint | |
2432 | which has since been deleted. */ | |
2433 | continue; | |
2434 | switch (bs->breakpoint_at->type) | |
2435 | { | |
2436 | case bp_none: | |
2437 | continue; | |
2438 | ||
2439 | case bp_breakpoint: | |
2440 | case bp_hardware_breakpoint: | |
2441 | case bp_until: | |
2442 | case bp_finish: | |
2443 | if (bs->stop) | |
2444 | { | |
2445 | if (bs->print) | |
2446 | bs_class = bp_noisy; | |
2447 | else | |
2448 | bs_class = bp_silent; | |
2449 | } | |
2450 | else | |
2451 | bs_class = bp_nostop; | |
2452 | break; | |
2453 | case bp_watchpoint: | |
2454 | case bp_hardware_watchpoint: | |
2455 | case bp_read_watchpoint: | |
2456 | case bp_access_watchpoint: | |
2457 | if (bs->stop) | |
2458 | { | |
2459 | if (bs->print) | |
2460 | bs_class = wp_noisy; | |
2461 | else | |
2462 | bs_class = wp_silent; | |
2463 | } | |
2464 | else | |
2465 | /* There was a watchpoint, but we're not stopping. This requires | |
2466 | no further action. */ | |
2467 | bs_class = no_effect; | |
2468 | break; | |
2469 | case bp_longjmp: | |
2470 | bs_class = long_jump; | |
2471 | break; | |
2472 | case bp_longjmp_resume: | |
2473 | bs_class = long_resume; | |
2474 | break; | |
2475 | case bp_step_resume: | |
2476 | if (bs->stop) | |
2477 | { | |
2478 | bs_class = step_resume; | |
2479 | } | |
2480 | else | |
2481 | /* It is for the wrong frame. */ | |
2482 | bs_class = bp_nostop; | |
2483 | break; | |
2484 | case bp_through_sigtramp: | |
2485 | bs_class = through_sig; | |
2486 | break; | |
2487 | case bp_watchpoint_scope: | |
2488 | bs_class = bp_nostop; | |
2489 | break; | |
2490 | case bp_shlib_event: | |
2491 | bs_class = shlib_event; | |
2492 | break; | |
2493 | case bp_catch_load: | |
2494 | case bp_catch_unload: | |
2495 | /* Only if this catchpoint triggered should we cause the | |
2496 | step-out-of-dld behaviour. Otherwise, we ignore this | |
2497 | catchpoint. */ | |
2498 | if (bs->stop) | |
2499 | bs_class = catch_shlib_event; | |
2500 | else | |
2501 | bs_class = no_effect; | |
2502 | break; | |
2503 | case bp_catch_fork: | |
2504 | case bp_catch_vfork: | |
2505 | case bp_catch_exec: | |
2506 | if (bs->stop) | |
2507 | { | |
2508 | if (bs->print) | |
2509 | bs_class = bp_noisy; | |
2510 | else | |
2511 | bs_class = bp_silent; | |
2512 | } | |
2513 | else | |
2514 | /* There was a catchpoint, but we're not stopping. This requires | |
2515 | no further action. */ | |
2516 | bs_class = no_effect; | |
2517 | break; | |
2518 | case bp_catch_catch: | |
2519 | if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH) | |
2520 | bs_class = bp_nostop; | |
2521 | else if (bs->stop) | |
2522 | bs_class = bs->print ? bp_noisy : bp_silent; | |
2523 | break; | |
2524 | case bp_catch_throw: | |
2525 | if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW) | |
2526 | bs_class = bp_nostop; | |
2527 | else if (bs->stop) | |
2528 | bs_class = bs->print ? bp_noisy : bp_silent; | |
2529 | break; | |
2530 | case bp_call_dummy: | |
2531 | /* Make sure the action is stop (silent or noisy), so infrun.c | |
2532 | pops the dummy frame. */ | |
2533 | bs_class = bp_silent; | |
2534 | retval.call_dummy = 1; | |
2535 | break; | |
2536 | } | |
2537 | current_action = table[(int)bs_class][(int)current_action]; | |
2538 | } | |
2539 | retval.main_action = current_action; | |
2540 | return retval; | |
2541 | } | |
2542 | ||
2543 | /* Nonzero if we should step constantly (e.g. watchpoints on machines | |
2544 | without hardware support). This isn't related to a specific bpstat, | |
2545 | just to things like whether watchpoints are set. */ | |
2546 | ||
2547 | int | |
2548 | bpstat_should_step () | |
2549 | { | |
2550 | struct breakpoint *b; | |
2551 | ALL_BREAKPOINTS (b) | |
2552 | if (b->enable == enabled && b->type == bp_watchpoint) | |
2553 | return 1; | |
2554 | return 0; | |
2555 | } | |
2556 | ||
2557 | /* Nonzero if there are enabled hardware watchpoints. */ | |
2558 | int | |
2559 | bpstat_have_active_hw_watchpoints () | |
2560 | { | |
2561 | struct breakpoint *b; | |
2562 | ALL_BREAKPOINTS (b) | |
2563 | if ((b->enable == enabled) && | |
2564 | (b->inserted) && | |
2565 | ((b->type == bp_hardware_watchpoint) || | |
2566 | (b->type == bp_read_watchpoint) || | |
2567 | (b->type == bp_access_watchpoint))) | |
2568 | return 1; | |
2569 | return 0; | |
2570 | } | |
2571 | ||
2572 | \f | |
2573 | /* Given a bpstat that records zero or more triggered eventpoints, this | |
2574 | function returns another bpstat which contains only the catchpoints | |
2575 | on that first list, if any. */ | |
2576 | void | |
2577 | bpstat_get_triggered_catchpoints (ep_list, cp_list) | |
2578 | bpstat ep_list; | |
2579 | bpstat * cp_list; | |
2580 | { | |
2581 | struct bpstats root_bs[1]; | |
2582 | bpstat bs = root_bs; | |
2583 | struct breakpoint * ep; | |
2584 | char * dll_pathname; | |
2585 | ||
2586 | bpstat_clear (cp_list); | |
2587 | root_bs->next = NULL; | |
2588 | ||
2589 | for (; ep_list != NULL; ep_list = ep_list->next ) | |
2590 | { | |
2591 | /* Is this eventpoint a catchpoint? If not, ignore it. */ | |
2592 | ep = ep_list->breakpoint_at; | |
2593 | if (ep == NULL) | |
2594 | break; | |
2595 | if ((ep->type != bp_catch_load) && | |
2596 | (ep->type != bp_catch_unload) && | |
2597 | (ep->type != bp_catch_catch) && | |
2598 | (ep->type != bp_catch_throw)) /* pai: (temp) ADD fork/vfork here!! */ | |
2599 | continue; | |
2600 | ||
2601 | /* Yes; add it to the list. */ | |
2602 | bs = bpstat_alloc (ep, bs); | |
2603 | *bs = *ep_list; | |
2604 | bs->next = NULL; | |
2605 | bs = root_bs->next; | |
2606 | ||
2607 | #if defined(SOLIB_ADD) | |
2608 | /* Also, for each triggered catchpoint, tag it with the name of | |
2609 | the library that caused this trigger. (We copy the name now, | |
2610 | because it's only guaranteed to be available NOW, when the | |
2611 | catchpoint triggers. Clients who may wish to know the name | |
2612 | later must get it from the catchpoint itself.) */ | |
2613 | if (ep->triggered_dll_pathname != NULL) | |
2614 | free (ep->triggered_dll_pathname); | |
2615 | if (ep->type == bp_catch_load) | |
2616 | dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (inferior_pid); | |
2617 | else | |
2618 | dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (inferior_pid); | |
2619 | #else | |
2620 | dll_pathname = NULL; | |
2621 | #endif | |
2622 | if (dll_pathname) | |
2623 | { | |
2624 | ep->triggered_dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1); | |
2625 | strcpy (ep->triggered_dll_pathname, dll_pathname); | |
2626 | } | |
2627 | else | |
2628 | ep->triggered_dll_pathname = NULL; | |
2629 | } | |
2630 | ||
2631 | *cp_list = bs; | |
2632 | } | |
2633 | ||
2634 | /* Print information on breakpoint number BNUM, or -1 if all. | |
2635 | If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS | |
2636 | is nonzero, process only watchpoints. */ | |
2637 | ||
2638 | typedef struct { | |
2639 | enum bptype type; | |
2640 | char * description; | |
2641 | } ep_type_description_t; | |
2642 | ||
2643 | static void | |
2644 | breakpoint_1 (bnum, allflag) | |
2645 | int bnum; | |
2646 | int allflag; | |
2647 | { | |
2648 | register struct breakpoint *b; | |
2649 | register struct command_line *l; | |
2650 | register struct symbol *sym; | |
2651 | CORE_ADDR last_addr = (CORE_ADDR)-1; | |
2652 | int found_a_breakpoint = 0; | |
2653 | static ep_type_description_t bptypes[] = | |
2654 | { | |
2655 | {bp_none, "?deleted?"}, | |
2656 | {bp_breakpoint, "breakpoint"}, | |
2657 | {bp_hardware_breakpoint, "hw breakpoint"}, | |
2658 | {bp_until, "until"}, | |
2659 | {bp_finish, "finish"}, | |
2660 | {bp_watchpoint, "watchpoint"}, | |
2661 | {bp_hardware_watchpoint, "hw watchpoint"}, | |
2662 | {bp_read_watchpoint, "read watchpoint"}, | |
2663 | {bp_access_watchpoint, "acc watchpoint"}, | |
2664 | {bp_longjmp, "longjmp"}, | |
2665 | {bp_longjmp_resume, "longjmp resume"}, | |
2666 | {bp_step_resume, "step resume"}, | |
2667 | {bp_through_sigtramp, "sigtramp"}, | |
2668 | {bp_watchpoint_scope, "watchpoint scope"}, | |
2669 | {bp_call_dummy, "call dummy"}, | |
2670 | {bp_shlib_event, "shlib events"}, | |
2671 | {bp_catch_load, "catch load"}, | |
2672 | {bp_catch_unload, "catch unload"}, | |
2673 | {bp_catch_fork, "catch fork"}, | |
2674 | {bp_catch_vfork, "catch vfork"}, | |
2675 | {bp_catch_exec, "catch exec"}, | |
2676 | {bp_catch_catch, "catch catch"}, | |
2677 | {bp_catch_throw, "catch throw"} | |
2678 | }; | |
2679 | ||
2680 | static char *bpdisps[] = {"del", "dstp", "dis", "keep"}; | |
2681 | static char bpenables[] = "nyn"; | |
2682 | char wrap_indent[80]; | |
2683 | ||
2684 | ALL_BREAKPOINTS (b) | |
2685 | if (bnum == -1 | |
2686 | || bnum == b->number) | |
2687 | { | |
2688 | /* We only print out user settable breakpoints unless the allflag is set. */ | |
2689 | if (!allflag | |
2690 | && b->type != bp_breakpoint | |
2691 | && b->type != bp_catch_load | |
2692 | && b->type != bp_catch_unload | |
2693 | && b->type != bp_catch_fork | |
2694 | && b->type != bp_catch_vfork | |
2695 | && b->type != bp_catch_exec | |
2696 | && b->type != bp_catch_catch | |
2697 | && b->type != bp_catch_throw | |
2698 | && b->type != bp_hardware_breakpoint | |
2699 | && b->type != bp_watchpoint | |
2700 | && b->type != bp_read_watchpoint | |
2701 | && b->type != bp_access_watchpoint | |
2702 | && b->type != bp_hardware_watchpoint) | |
2703 | continue; | |
2704 | ||
2705 | if (!found_a_breakpoint++) | |
2706 | { | |
2707 | annotate_breakpoints_headers (); | |
2708 | ||
2709 | annotate_field (0); | |
2710 | printf_filtered ("Num "); | |
2711 | annotate_field (1); | |
2712 | printf_filtered ("Type "); | |
2713 | annotate_field (2); | |
2714 | printf_filtered ("Disp "); | |
2715 | annotate_field (3); | |
2716 | printf_filtered ("Enb "); | |
2717 | if (addressprint) | |
2718 | { | |
2719 | annotate_field (4); | |
2720 | printf_filtered ("Address "); | |
2721 | } | |
2722 | annotate_field (5); | |
2723 | printf_filtered ("What\n"); | |
2724 | ||
2725 | annotate_breakpoints_table (); | |
2726 | } | |
2727 | ||
2728 | annotate_record (); | |
2729 | annotate_field (0); | |
2730 | printf_filtered ("%-3d ", b->number); | |
2731 | annotate_field (1); | |
2732 | if ((int)b->type > (sizeof(bptypes)/sizeof(bptypes[0]))) | |
2733 | error ("bptypes table does not describe type #%d.", (int)b->type); | |
2734 | if ((int)b->type != bptypes[(int)b->type].type) | |
2735 | error ("bptypes table does not describe type #%d?", (int)b->type); | |
2736 | printf_filtered ("%-14s ", bptypes[(int)b->type].description); | |
2737 | annotate_field (2); | |
2738 | printf_filtered ("%-4s ", bpdisps[(int)b->disposition]); | |
2739 | annotate_field (3); | |
2740 | printf_filtered ("%-3c ", bpenables[(int)b->enable]); | |
2741 | ||
2742 | strcpy (wrap_indent, " "); | |
2743 | if (addressprint) | |
2744 | strcat (wrap_indent, " "); | |
2745 | switch (b->type) | |
2746 | { | |
2747 | case bp_watchpoint: | |
2748 | case bp_hardware_watchpoint: | |
2749 | case bp_read_watchpoint: | |
2750 | case bp_access_watchpoint: | |
2751 | /* Field 4, the address, is omitted (which makes the columns | |
2752 | not line up too nicely with the headers, but the effect | |
2753 | is relatively readable). */ | |
2754 | annotate_field (5); | |
2755 | print_expression (b->exp, gdb_stdout); | |
2756 | break; | |
2757 | ||
2758 | case bp_catch_load: | |
2759 | case bp_catch_unload: | |
2760 | /* Field 4, the address, is omitted (which makes the columns | |
2761 | not line up too nicely with the headers, but the effect | |
2762 | is relatively readable). */ | |
2763 | annotate_field (5); | |
2764 | if (b->dll_pathname == NULL) | |
2765 | printf_filtered ("<any library> "); | |
2766 | else | |
2767 | printf_filtered ("library \"%s\" ", b->dll_pathname); | |
2768 | break; | |
2769 | ||
2770 | case bp_catch_fork: | |
2771 | case bp_catch_vfork: | |
2772 | /* Field 4, the address, is omitted (which makes the columns | |
2773 | not line up too nicely with the headers, but the effect | |
2774 | is relatively readable). */ | |
2775 | annotate_field (5); | |
2776 | if (b->forked_inferior_pid != 0) | |
2777 | printf_filtered ("process %d ", b->forked_inferior_pid); | |
2778 | break; | |
2779 | ||
2780 | case bp_catch_exec: | |
2781 | /* Field 4, the address, is omitted (which makes the columns | |
2782 | not line up too nicely with the headers, but the effect | |
2783 | is relatively readable). */ | |
2784 | annotate_field (5); | |
2785 | if (b->exec_pathname != NULL) | |
2786 | printf_filtered ("program \"%s\" ", b->exec_pathname); | |
2787 | break; | |
2788 | case bp_catch_catch: | |
2789 | /* Field 4, the address, is omitted (which makes the columns | |
2790 | not line up too nicely with the headers, but the effect | |
2791 | is relatively readable). */ | |
2792 | annotate_field (5); | |
2793 | printf_filtered ("exception catch "); | |
2794 | break; | |
2795 | case bp_catch_throw: | |
2796 | /* Field 4, the address, is omitted (which makes the columns | |
2797 | not line up too nicely with the headers, but the effect | |
2798 | is relatively readable). */ | |
2799 | annotate_field (5); | |
2800 | printf_filtered ("exception throw "); | |
2801 | break; | |
2802 | ||
2803 | case bp_breakpoint: | |
2804 | case bp_hardware_breakpoint: | |
2805 | case bp_until: | |
2806 | case bp_finish: | |
2807 | case bp_longjmp: | |
2808 | case bp_longjmp_resume: | |
2809 | case bp_step_resume: | |
2810 | case bp_through_sigtramp: | |
2811 | case bp_watchpoint_scope: | |
2812 | case bp_call_dummy: | |
2813 | case bp_shlib_event: | |
2814 | if (addressprint) | |
2815 | { | |
2816 | annotate_field (4); | |
2817 | /* FIXME-32x64: need a print_address_numeric with | |
2818 | field width */ | |
2819 | printf_filtered | |
2820 | ("%s ", | |
2821 | local_hex_string_custom | |
2822 | ((unsigned long) b->address, "08l")); | |
2823 | } | |
2824 | ||
2825 | annotate_field (5); | |
2826 | ||
2827 | last_addr = b->address; | |
2828 | if (b->source_file) | |
2829 | { | |
2830 | sym = find_pc_sect_function (b->address, b->section); | |
2831 | if (sym) | |
2832 | { | |
2833 | fputs_filtered ("in ", gdb_stdout); | |
2834 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout); | |
2835 | wrap_here (wrap_indent); | |
2836 | fputs_filtered (" at ", gdb_stdout); | |
2837 | } | |
2838 | fputs_filtered (b->source_file, gdb_stdout); | |
2839 | printf_filtered (":%d", b->line_number); | |
2840 | } | |
2841 | else | |
2842 | print_address_symbolic (b->address, gdb_stdout, demangle, " "); | |
2843 | break; | |
2844 | } | |
2845 | ||
2846 | if (b->thread != -1) | |
2847 | printf_filtered (" thread %d", b->thread ); | |
2848 | ||
2849 | printf_filtered ("\n"); | |
2850 | ||
2851 | if (b->frame) | |
2852 | { | |
2853 | annotate_field (6); | |
2854 | ||
2855 | printf_filtered ("\tstop only in stack frame at "); | |
2856 | print_address_numeric (b->frame, 1, gdb_stdout); | |
2857 | printf_filtered ("\n"); | |
2858 | } | |
2859 | ||
2860 | if (b->cond) | |
2861 | { | |
2862 | annotate_field (7); | |
2863 | ||
2864 | printf_filtered ("\tstop only if "); | |
2865 | print_expression (b->cond, gdb_stdout); | |
2866 | printf_filtered ("\n"); | |
2867 | } | |
2868 | ||
2869 | if (b->thread != -1) | |
2870 | { | |
2871 | /* FIXME should make an annotation for this */ | |
2872 | printf_filtered ("\tstop only in thread %d\n", b->thread); | |
2873 | } | |
2874 | ||
2875 | if (show_breakpoint_hit_counts && b->hit_count) | |
2876 | { | |
2877 | /* FIXME should make an annotation for this */ | |
2878 | if (ep_is_catchpoint (b)) | |
2879 | printf_filtered ("\tcatchpoint"); | |
2880 | else | |
2881 | printf_filtered ("\tbreakpoint"); | |
2882 | printf_filtered (" already hit %d time%s\n", | |
2883 | b->hit_count, (b->hit_count == 1 ? "" : "s")); | |
2884 | } | |
2885 | ||
2886 | if (b->ignore_count) | |
2887 | { | |
2888 | annotate_field (8); | |
2889 | ||
2890 | printf_filtered ("\tignore next %d hits\n", b->ignore_count); | |
2891 | } | |
2892 | ||
2893 | if ((l = b->commands)) | |
2894 | { | |
2895 | annotate_field (9); | |
2896 | ||
2897 | while (l) | |
2898 | { | |
2899 | print_command_line (l, 4); | |
2900 | l = l->next; | |
2901 | } | |
2902 | } | |
2903 | } | |
2904 | ||
2905 | if (!found_a_breakpoint) | |
2906 | { | |
2907 | if (bnum == -1) | |
2908 | printf_filtered ("No breakpoints or watchpoints.\n"); | |
2909 | else | |
2910 | printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum); | |
2911 | } | |
2912 | else | |
2913 | /* Compare against (CORE_ADDR)-1 in case some compiler decides | |
2914 | that a comparison of an unsigned with -1 is always false. */ | |
2915 | if (last_addr != (CORE_ADDR)-1) | |
2916 | set_next_address (last_addr); | |
2917 | ||
2918 | annotate_breakpoints_table_end (); | |
2919 | } | |
2920 | ||
2921 | /* ARGSUSED */ | |
2922 | static void | |
2923 | breakpoints_info (bnum_exp, from_tty) | |
2924 | char *bnum_exp; | |
2925 | int from_tty; | |
2926 | { | |
2927 | int bnum = -1; | |
2928 | ||
2929 | if (bnum_exp) | |
2930 | bnum = parse_and_eval_address (bnum_exp); | |
2931 | ||
2932 | breakpoint_1 (bnum, 0); | |
2933 | } | |
2934 | ||
2935 | #if MAINTENANCE_CMDS | |
2936 | ||
2937 | /* ARGSUSED */ | |
2938 | void | |
2939 | maintenance_info_breakpoints (bnum_exp, from_tty) | |
2940 | char *bnum_exp; | |
2941 | int from_tty; | |
2942 | { | |
2943 | int bnum = -1; | |
2944 | ||
2945 | if (bnum_exp) | |
2946 | bnum = parse_and_eval_address (bnum_exp); | |
2947 | ||
2948 | breakpoint_1 (bnum, 1); | |
2949 | } | |
2950 | ||
2951 | #endif | |
2952 | ||
2953 | /* Print a message describing any breakpoints set at PC. */ | |
2954 | ||
2955 | static void | |
2956 | describe_other_breakpoints (pc, section) | |
2957 | CORE_ADDR pc; | |
2958 | asection *section; | |
2959 | { | |
2960 | register int others = 0; | |
2961 | register struct breakpoint *b; | |
2962 | ||
2963 | ALL_BREAKPOINTS (b) | |
2964 | if (b->address == pc) | |
2965 | if (overlay_debugging == 0 || | |
2966 | b->section == section) | |
2967 | others++; | |
2968 | if (others > 0) | |
2969 | { | |
2970 | printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); | |
2971 | ALL_BREAKPOINTS (b) | |
2972 | if (b->address == pc) | |
2973 | if (overlay_debugging == 0 || | |
2974 | b->section == section) | |
2975 | { | |
2976 | others--; | |
2977 | printf_filtered | |
2978 | ("%d%s%s ", | |
2979 | b->number, | |
2980 | ((b->enable == disabled || b->enable == shlib_disabled || b->enable == call_disabled) | |
2981 | ? " (disabled)" : ""), | |
2982 | (others > 1) ? "," : ((others == 1) ? " and" : "")); | |
2983 | } | |
2984 | printf_filtered ("also set at pc "); | |
2985 | print_address_numeric (pc, 1, gdb_stdout); | |
2986 | printf_filtered (".\n"); | |
2987 | } | |
2988 | } | |
2989 | \f | |
2990 | /* Set the default place to put a breakpoint | |
2991 | for the `break' command with no arguments. */ | |
2992 | ||
2993 | void | |
2994 | set_default_breakpoint (valid, addr, symtab, line) | |
2995 | int valid; | |
2996 | CORE_ADDR addr; | |
2997 | struct symtab *symtab; | |
2998 | int line; | |
2999 | { | |
3000 | default_breakpoint_valid = valid; | |
3001 | default_breakpoint_address = addr; | |
3002 | default_breakpoint_symtab = symtab; | |
3003 | default_breakpoint_line = line; | |
3004 | } | |
3005 | ||
3006 | /* Rescan breakpoints at address ADDRESS, | |
3007 | marking the first one as "first" and any others as "duplicates". | |
3008 | This is so that the bpt instruction is only inserted once. */ | |
3009 | ||
3010 | static void | |
3011 | check_duplicates (address, section) | |
3012 | CORE_ADDR address; | |
3013 | asection *section; | |
3014 | { | |
3015 | register struct breakpoint *b; | |
3016 | register int count = 0; | |
3017 | ||
3018 | if (address == 0) /* Watchpoints are uninteresting */ | |
3019 | return; | |
3020 | ||
3021 | ALL_BREAKPOINTS (b) | |
3022 | if (b->enable != disabled | |
3023 | && b->enable != shlib_disabled | |
3024 | && b->enable != call_disabled | |
3025 | && b->address == address | |
3026 | && (overlay_debugging == 0 || b->section == section)) | |
3027 | { | |
3028 | count++; | |
3029 | b->duplicate = count > 1; | |
3030 | } | |
3031 | } | |
3032 | ||
3033 | /* Low level routine to set a breakpoint. | |
3034 | Takes as args the three things that every breakpoint must have. | |
3035 | Returns the breakpoint object so caller can set other things. | |
3036 | Does not set the breakpoint number! | |
3037 | Does not print anything. | |
3038 | ||
3039 | ==> This routine should not be called if there is a chance of later | |
3040 | error(); otherwise it leaves a bogus breakpoint on the chain. Validate | |
3041 | your arguments BEFORE calling this routine! */ | |
3042 | ||
3043 | struct breakpoint * | |
3044 | set_raw_breakpoint (sal) | |
3045 | struct symtab_and_line sal; | |
3046 | { | |
3047 | register struct breakpoint *b, *b1; | |
3048 | ||
3049 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); | |
3050 | memset (b, 0, sizeof (*b)); | |
3051 | b->address = sal.pc; | |
3052 | if (sal.symtab == NULL) | |
3053 | b->source_file = NULL; | |
3054 | else | |
3055 | b->source_file = savestring (sal.symtab->filename, | |
3056 | strlen (sal.symtab->filename)); | |
3057 | b->section = sal.section; | |
3058 | b->language = current_language->la_language; | |
3059 | b->input_radix = input_radix; | |
3060 | b->thread = -1; | |
3061 | b->line_number = sal.line; | |
3062 | b->enable = enabled; | |
3063 | b->next = 0; | |
3064 | b->silent = 0; | |
3065 | b->ignore_count = 0; | |
3066 | b->commands = NULL; | |
3067 | b->frame = 0; | |
3068 | b->dll_pathname = NULL; | |
3069 | b->triggered_dll_pathname = NULL; | |
3070 | b->forked_inferior_pid = 0; | |
3071 | b->exec_pathname = NULL; | |
3072 | ||
3073 | /* Add this breakpoint to the end of the chain | |
3074 | so that a list of breakpoints will come out in order | |
3075 | of increasing numbers. */ | |
3076 | ||
3077 | b1 = breakpoint_chain; | |
3078 | if (b1 == 0) | |
3079 | breakpoint_chain = b; | |
3080 | else | |
3081 | { | |
3082 | while (b1->next) | |
3083 | b1 = b1->next; | |
3084 | b1->next = b; | |
3085 | } | |
3086 | ||
3087 | check_duplicates (sal.pc, sal.section); | |
3088 | breakpoints_changed (); | |
3089 | ||
3090 | return b; | |
3091 | } | |
3092 | ||
3093 | #ifdef GET_LONGJMP_TARGET | |
3094 | ||
3095 | static void | |
3096 | create_longjmp_breakpoint (func_name) | |
3097 | char *func_name; | |
3098 | { | |
3099 | struct symtab_and_line sal; | |
3100 | struct breakpoint *b; | |
3101 | ||
3102 | INIT_SAL (&sal); /* initialize to zeroes */ | |
3103 | if (func_name != NULL) | |
3104 | { | |
3105 | struct minimal_symbol *m; | |
3106 | ||
3107 | m = lookup_minimal_symbol_text (func_name, NULL, (struct objfile *)NULL); | |
3108 | if (m) | |
3109 | sal.pc = SYMBOL_VALUE_ADDRESS (m); | |
3110 | else | |
3111 | return; | |
3112 | } | |
3113 | sal.section = find_pc_overlay (sal.pc); | |
3114 | b = set_raw_breakpoint (sal); | |
3115 | if (!b) return; | |
3116 | ||
3117 | b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume; | |
3118 | b->disposition = donttouch; | |
3119 | b->enable = disabled; | |
3120 | b->silent = 1; | |
3121 | if (func_name) | |
3122 | b->addr_string = strsave(func_name); | |
3123 | b->number = internal_breakpoint_number--; | |
3124 | } | |
3125 | ||
3126 | #endif /* #ifdef GET_LONGJMP_TARGET */ | |
3127 | ||
3128 | /* Call this routine when stepping and nexting to enable a breakpoint if we do | |
3129 | a longjmp(). When we hit that breakpoint, call | |
3130 | set_longjmp_resume_breakpoint() to figure out where we are going. */ | |
3131 | ||
3132 | void | |
3133 | enable_longjmp_breakpoint() | |
3134 | { | |
3135 | register struct breakpoint *b; | |
3136 | ||
3137 | ALL_BREAKPOINTS (b) | |
3138 | if (b->type == bp_longjmp) | |
3139 | { | |
3140 | b->enable = enabled; | |
3141 | check_duplicates (b->address, b->section); | |
3142 | } | |
3143 | } | |
3144 | ||
3145 | void | |
3146 | disable_longjmp_breakpoint() | |
3147 | { | |
3148 | register struct breakpoint *b; | |
3149 | ||
3150 | ALL_BREAKPOINTS (b) | |
3151 | if ( b->type == bp_longjmp | |
3152 | || b->type == bp_longjmp_resume) | |
3153 | { | |
3154 | b->enable = disabled; | |
3155 | check_duplicates (b->address, b->section); | |
3156 | } | |
3157 | } | |
3158 | ||
3159 | #ifdef SOLIB_ADD | |
3160 | void | |
3161 | remove_solib_event_breakpoints () | |
3162 | { | |
3163 | register struct breakpoint *b, *temp; | |
3164 | ||
3165 | ALL_BREAKPOINTS_SAFE (b, temp) | |
3166 | if (b->type == bp_shlib_event) | |
3167 | delete_breakpoint (b); | |
3168 | } | |
3169 | ||
3170 | void | |
3171 | create_solib_event_breakpoint (address) | |
3172 | CORE_ADDR address; | |
3173 | { | |
3174 | struct breakpoint *b; | |
3175 | struct symtab_and_line sal; | |
3176 | ||
3177 | INIT_SAL (&sal); /* initialize to zeroes */ | |
3178 | sal.pc = address; | |
3179 | sal.section = find_pc_overlay (sal.pc); | |
3180 | b = set_raw_breakpoint (sal); | |
3181 | b->number = internal_breakpoint_number--; | |
3182 | b->disposition = donttouch; | |
3183 | b->type = bp_shlib_event; | |
3184 | } | |
3185 | ||
3186 | void | |
3187 | disable_breakpoints_in_shlibs (silent) | |
3188 | int silent; | |
3189 | { | |
3190 | struct breakpoint * b; | |
3191 | int disabled_shlib_breaks = 0; | |
3192 | ||
3193 | /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */ | |
3194 | ALL_BREAKPOINTS (b) | |
3195 | { | |
3196 | #if defined (PC_SOLIB) | |
3197 | if (((b->type == bp_breakpoint) || | |
3198 | (b->type == bp_hardware_breakpoint)) && | |
3199 | (b->enable != shlib_disabled) && | |
3200 | (b->enable != call_disabled) && | |
3201 | ! b->duplicate && | |
3202 | PC_SOLIB (b->address)) | |
3203 | { | |
3204 | b->enable = shlib_disabled; | |
3205 | if (!silent) | |
3206 | { | |
3207 | if (!disabled_shlib_breaks) | |
3208 | { | |
3209 | target_terminal_ours_for_output (); | |
3210 | printf_filtered ("Temporarily disabling shared library breakpoints:\n"); | |
3211 | } | |
3212 | disabled_shlib_breaks = 1; | |
3213 | printf_filtered ("%d ", b->number); | |
3214 | } | |
3215 | } | |
3216 | #endif | |
3217 | } | |
3218 | if (disabled_shlib_breaks && !silent) | |
3219 | printf_filtered ("\n"); | |
3220 | } | |
3221 | ||
3222 | /* Try to reenable any breakpoints in shared libraries. */ | |
3223 | void | |
3224 | re_enable_breakpoints_in_shlibs () | |
3225 | { | |
3226 | struct breakpoint *b; | |
3227 | ||
3228 | ALL_BREAKPOINTS (b) | |
3229 | if (b->enable == shlib_disabled) | |
3230 | { | |
3231 | char buf[1]; | |
3232 | ||
3233 | /* Do not reenable the breakpoint if the shared library | |
3234 | is still not mapped in. */ | |
3235 | if (target_read_memory (b->address, buf, 1) == 0) | |
3236 | b->enable = enabled; | |
3237 | } | |
3238 | } | |
3239 | ||
3240 | #endif | |
3241 | ||
3242 | static void | |
3243 | create_solib_load_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string, bp_kind) | |
3244 | char * hookname; | |
3245 | int tempflag; | |
3246 | char * dll_pathname; | |
3247 | char * cond_string; | |
3248 | enum bptype bp_kind; | |
3249 | { | |
3250 | struct breakpoint * b; | |
3251 | struct symtabs_and_lines sals; | |
3252 | struct symtab_and_line sal; | |
3253 | struct cleanup * old_chain; | |
3254 | struct cleanup * canonical_strings_chain = NULL; | |
3255 | int i; | |
3256 | char * addr_start = hookname; | |
3257 | char * addr_end = NULL; | |
3258 | char ** canonical = (char **) NULL; | |
3259 | int thread = -1; /* All threads. */ | |
3260 | ||
3261 | /* Set a breakpoint on the specified hook. */ | |
3262 | sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical); | |
3263 | addr_end = hookname; | |
3264 | ||
3265 | if (sals.nelts == 0) | |
3266 | { | |
3267 | warning ("Unable to set a breakpoint on dynamic linker callback."); | |
3268 | warning ("Suggest linking with /opt/langtools/lib/end.o."); | |
3269 | warning ("GDB will be unable to track shl_load/shl_unload calls"); | |
3270 | return; | |
3271 | } | |
3272 | if (sals.nelts != 1) | |
3273 | { | |
3274 | warning ("Unable to set a unique breakpoint on dynamic linker callback."); | |
3275 | warning ("GDB will be unable to track shl_load/shl_unload calls"); | |
3276 | return; | |
3277 | } | |
3278 | ||
3279 | /* Make sure that all storage allocated in decode_line_1 gets freed in case | |
3280 | the following errors out. */ | |
3281 | old_chain = make_cleanup (free, sals.sals); | |
3282 | if (canonical != (char **)NULL) | |
3283 | { | |
3284 | make_cleanup (free, canonical); | |
3285 | canonical_strings_chain = make_cleanup (null_cleanup, 0); | |
3286 | if (canonical[0] != NULL) | |
3287 | make_cleanup (free, canonical[0]); | |
3288 | } | |
3289 | ||
3290 | resolve_sal_pc (&sals.sals[0]); | |
3291 | ||
3292 | /* Remove the canonical strings from the cleanup, they are needed below. */ | |
3293 | if (canonical != (char **)NULL) | |
3294 | discard_cleanups (canonical_strings_chain); | |
3295 | ||
3296 | b = set_raw_breakpoint (sals.sals[0]); | |
3297 | set_breakpoint_count (breakpoint_count + 1); | |
3298 | b->number = breakpoint_count; | |
3299 | b->cond = NULL; | |
3300 | b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string)); | |
3301 | b->thread = thread; | |
3302 | ||
3303 | if (canonical != (char **)NULL && canonical[0] != NULL) | |
3304 | b->addr_string = canonical[0]; | |
3305 | else if (addr_start) | |
3306 | b->addr_string = savestring (addr_start, addr_end - addr_start); | |
3307 | ||
3308 | b->enable = enabled; | |
3309 | b->disposition = tempflag ? del : donttouch; | |
3310 | ||
3311 | if (dll_pathname == NULL) | |
3312 | b->dll_pathname = NULL; | |
3313 | else | |
3314 | { | |
3315 | b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1); | |
3316 | strcpy (b->dll_pathname, dll_pathname); | |
3317 | } | |
3318 | b->type = bp_kind; | |
3319 | ||
3320 | mention (b); | |
3321 | do_cleanups (old_chain); | |
3322 | } | |
3323 | ||
3324 | void | |
3325 | create_solib_load_event_breakpoint (hookname, tempflag, dll_pathname, cond_string) | |
3326 | char * hookname; | |
3327 | int tempflag; | |
3328 | char * dll_pathname; | |
3329 | char * cond_string; | |
3330 | { | |
3331 | create_solib_load_unload_event_breakpoint (hookname, | |
3332 | tempflag, | |
3333 | dll_pathname, | |
3334 | cond_string, | |
3335 | bp_catch_load); | |
3336 | } | |
3337 | ||
3338 | void | |
3339 | create_solib_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string) | |
3340 | char * hookname; | |
3341 | int tempflag; | |
3342 | char * dll_pathname; | |
3343 | char * cond_string; | |
3344 | { | |
3345 | create_solib_load_unload_event_breakpoint (hookname, | |
3346 | tempflag, | |
3347 | dll_pathname, | |
3348 | cond_string, | |
3349 | bp_catch_unload); | |
3350 | } | |
3351 | ||
3352 | static void | |
3353 | create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_kind) | |
3354 | int tempflag; | |
3355 | char * cond_string; | |
3356 | enum bptype bp_kind; | |
3357 | { | |
3358 | struct symtab_and_line sal; | |
3359 | struct breakpoint * b; | |
3360 | int thread = -1; /* All threads. */ | |
3361 | ||
3362 | INIT_SAL(&sal); | |
3363 | sal.pc = 0; | |
3364 | sal.symtab = NULL; | |
3365 | sal.line = 0; | |
3366 | ||
3367 | b = set_raw_breakpoint (sal); | |
3368 | set_breakpoint_count (breakpoint_count + 1); | |
3369 | b->number = breakpoint_count; | |
3370 | b->cond = NULL; | |
3371 | b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string)); | |
3372 | b->thread = thread; | |
3373 | b->addr_string = NULL; | |
3374 | b->enable = enabled; | |
3375 | b->disposition = tempflag ? del : donttouch; | |
3376 | b->forked_inferior_pid = 0; | |
3377 | ||
3378 | b->type = bp_kind; | |
3379 | ||
3380 | mention (b); | |
3381 | } | |
3382 | ||
3383 | void | |
3384 | create_fork_event_catchpoint (tempflag, cond_string) | |
3385 | int tempflag; | |
3386 | char * cond_string; | |
3387 | { | |
3388 | create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork); | |
3389 | } | |
3390 | ||
3391 | void | |
3392 | create_vfork_event_catchpoint (tempflag, cond_string) | |
3393 | int tempflag; | |
3394 | char * cond_string; | |
3395 | { | |
3396 | create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork); | |
3397 | } | |
3398 | ||
3399 | void | |
3400 | create_exec_event_catchpoint (tempflag, cond_string) | |
3401 | int tempflag; | |
3402 | char * cond_string; | |
3403 | { | |
3404 | struct symtab_and_line sal; | |
3405 | struct breakpoint * b; | |
3406 | int thread = -1; /* All threads. */ | |
3407 | ||
3408 | INIT_SAL(&sal); | |
3409 | sal.pc = 0; | |
3410 | sal.symtab = NULL; | |
3411 | sal.line = 0; | |
3412 | ||
3413 | b = set_raw_breakpoint (sal); | |
3414 | set_breakpoint_count (breakpoint_count + 1); | |
3415 | b->number = breakpoint_count; | |
3416 | b->cond = NULL; | |
3417 | b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string)); | |
3418 | b->thread = thread; | |
3419 | b->addr_string = NULL; | |
3420 | b->enable = enabled; | |
3421 | b->disposition = tempflag ? del : donttouch; | |
3422 | ||
3423 | b->type = bp_catch_exec; | |
3424 | ||
3425 | mention (b); | |
3426 | } | |
3427 | ||
3428 | static int | |
3429 | hw_breakpoint_used_count() | |
3430 | { | |
3431 | register struct breakpoint *b; | |
3432 | int i = 0; | |
3433 | ||
3434 | ALL_BREAKPOINTS (b) | |
3435 | { | |
3436 | if (b->type == bp_hardware_breakpoint && b->enable == enabled) | |
3437 | i++; | |
3438 | } | |
3439 | ||
3440 | return i; | |
3441 | } | |
3442 | ||
3443 | static int | |
3444 | hw_watchpoint_used_count(type, other_type_used) | |
3445 | enum bptype type; | |
3446 | int *other_type_used; | |
3447 | { | |
3448 | register struct breakpoint *b; | |
3449 | int i = 0; | |
3450 | ||
3451 | *other_type_used = 0; | |
3452 | ALL_BREAKPOINTS (b) | |
3453 | { | |
3454 | if (b->enable == enabled) | |
3455 | { | |
3456 | if (b->type == type) i++; | |
3457 | else if ((b->type == bp_hardware_watchpoint || | |
3458 | b->type == bp_read_watchpoint || | |
3459 | b->type == bp_access_watchpoint) | |
3460 | && b->enable == enabled) | |
3461 | *other_type_used = 1; | |
3462 | } | |
3463 | } | |
3464 | return i; | |
3465 | } | |
3466 | ||
3467 | /* Call this after hitting the longjmp() breakpoint. Use this to set a new | |
3468 | breakpoint at the target of the jmp_buf. | |
3469 | ||
3470 | FIXME - This ought to be done by setting a temporary breakpoint that gets | |
3471 | deleted automatically... */ | |
3472 | ||
3473 | void | |
3474 | set_longjmp_resume_breakpoint(pc, frame) | |
3475 | CORE_ADDR pc; | |
3476 | struct frame_info *frame; | |
3477 | { | |
3478 | register struct breakpoint *b; | |
3479 | ||
3480 | ALL_BREAKPOINTS (b) | |
3481 | if (b->type == bp_longjmp_resume) | |
3482 | { | |
3483 | b->address = pc; | |
3484 | b->enable = enabled; | |
3485 | if (frame != NULL) | |
3486 | b->frame = frame->frame; | |
3487 | else | |
3488 | b->frame = 0; | |
3489 | check_duplicates (b->address, b->section); | |
3490 | return; | |
3491 | } | |
3492 | } | |
3493 | ||
3494 | void | |
3495 | disable_watchpoints_before_interactive_call_start () | |
3496 | { | |
3497 | struct breakpoint * b; | |
3498 | ||
3499 | ALL_BREAKPOINTS (b) | |
3500 | { | |
3501 | if (((b->type == bp_watchpoint) | |
3502 | || (b->type == bp_hardware_watchpoint) | |
3503 | || (b->type == bp_read_watchpoint) | |
3504 | || (b->type == bp_access_watchpoint) | |
3505 | || ep_is_exception_catchpoint (b)) | |
3506 | && (b->enable == enabled)) | |
3507 | { | |
3508 | b->enable = call_disabled; | |
3509 | check_duplicates (b->address, b->section); | |
3510 | } | |
3511 | } | |
3512 | } | |
3513 | ||
3514 | void | |
3515 | enable_watchpoints_after_interactive_call_stop () | |
3516 | { | |
3517 | struct breakpoint * b; | |
3518 | ||
3519 | ALL_BREAKPOINTS (b) | |
3520 | { | |
3521 | if (((b->type == bp_watchpoint) | |
3522 | || (b->type == bp_hardware_watchpoint) | |
3523 | || (b->type == bp_read_watchpoint) | |
3524 | || (b->type == bp_access_watchpoint) | |
3525 | || ep_is_exception_catchpoint (b)) | |
3526 | && (b->enable == call_disabled)) | |
3527 | { | |
3528 | b->enable = enabled; | |
3529 | check_duplicates (b->address, b->section); | |
3530 | } | |
3531 | } | |
3532 | } | |
3533 | ||
3534 | ||
3535 | /* Set a breakpoint that will evaporate an end of command | |
3536 | at address specified by SAL. | |
3537 | Restrict it to frame FRAME if FRAME is nonzero. */ | |
3538 | ||
3539 | struct breakpoint * | |
3540 | set_momentary_breakpoint (sal, frame, type) | |
3541 | struct symtab_and_line sal; | |
3542 | struct frame_info *frame; | |
3543 | enum bptype type; | |
3544 | { | |
3545 | register struct breakpoint *b; | |
3546 | b = set_raw_breakpoint (sal); | |
3547 | b->type = type; | |
3548 | b->enable = enabled; | |
3549 | b->disposition = donttouch; | |
3550 | b->frame = (frame ? frame->frame : 0); | |
3551 | ||
3552 | /* If we're debugging a multi-threaded program, then we | |
3553 | want momentary breakpoints to be active in only a | |
3554 | single thread of control. */ | |
3555 | if (in_thread_list (inferior_pid)) | |
3556 | b->thread = pid_to_thread_id (inferior_pid); | |
3557 | ||
3558 | return b; | |
3559 | } | |
3560 | ||
3561 | \f | |
3562 | /* Tell the user we have just set a breakpoint B. */ | |
3563 | ||
3564 | static void | |
3565 | mention (b) | |
3566 | struct breakpoint *b; | |
3567 | { | |
3568 | int say_where = 0; | |
3569 | ||
3570 | /* FIXME: This is misplaced; mention() is called by things (like hitting a | |
3571 | watchpoint) other than breakpoint creation. It should be possible to | |
3572 | clean this up and at the same time replace the random calls to | |
3573 | breakpoint_changed with this hook, as has already been done for | |
3574 | delete_breakpoint_hook and so on. */ | |
3575 | if (create_breakpoint_hook) | |
3576 | create_breakpoint_hook (b); | |
3577 | ||
3578 | switch (b->type) | |
3579 | { | |
3580 | case bp_none: | |
3581 | printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number); | |
3582 | break; | |
3583 | case bp_watchpoint: | |
3584 | printf_filtered ("Watchpoint %d: ", b->number); | |
3585 | print_expression (b->exp, gdb_stdout); | |
3586 | break; | |
3587 | case bp_hardware_watchpoint: | |
3588 | printf_filtered ("Hardware watchpoint %d: ", b->number); | |
3589 | print_expression (b->exp, gdb_stdout); | |
3590 | break; | |
3591 | case bp_read_watchpoint: | |
3592 | printf_filtered ("Hardware read watchpoint %d: ", b->number); | |
3593 | print_expression (b->exp, gdb_stdout); | |
3594 | break; | |
3595 | case bp_access_watchpoint: | |
3596 | printf_filtered ("Hardware access (read/write) watchpoint %d: ",b->number); | |
3597 | print_expression (b->exp, gdb_stdout); | |
3598 | break; | |
3599 | case bp_breakpoint: | |
3600 | printf_filtered ("Breakpoint %d", b->number); | |
3601 | say_where = 1; | |
3602 | break; | |
3603 | case bp_hardware_breakpoint: | |
3604 | printf_filtered ("Hardware assisted breakpoint %d", b->number); | |
3605 | say_where = 1; | |
3606 | break; | |
3607 | case bp_catch_load: | |
3608 | case bp_catch_unload: | |
3609 | printf_filtered ("Catchpoint %d (%s %s)", | |
3610 | b->number, | |
3611 | (b->type == bp_catch_load) ? "load" : "unload", | |
3612 | (b->dll_pathname != NULL) ? b->dll_pathname : "<any library>"); | |
3613 | break; | |
3614 | case bp_catch_fork: | |
3615 | case bp_catch_vfork: | |
3616 | printf_filtered ("Catchpoint %d (%s)", | |
3617 | b->number, | |
3618 | (b->type == bp_catch_fork) ? "fork" : "vfork"); | |
3619 | break; | |
3620 | case bp_catch_exec: | |
3621 | printf_filtered ("Catchpoint %d (exec)", | |
3622 | b->number); | |
3623 | break; | |
3624 | case bp_catch_catch: | |
3625 | case bp_catch_throw: | |
3626 | printf_filtered ("Catchpoint %d (%s)", | |
3627 | b->number, | |
3628 | (b->type == bp_catch_catch) ? "catch" : "throw"); | |
3629 | break; | |
3630 | ||
3631 | case bp_until: | |
3632 | case bp_finish: | |
3633 | case bp_longjmp: | |
3634 | case bp_longjmp_resume: | |
3635 | case bp_step_resume: | |
3636 | case bp_through_sigtramp: | |
3637 | case bp_call_dummy: | |
3638 | case bp_watchpoint_scope: | |
3639 | case bp_shlib_event: | |
3640 | break; | |
3641 | } | |
3642 | if (say_where) | |
3643 | { | |
3644 | if (addressprint || b->source_file == NULL) | |
3645 | { | |
3646 | printf_filtered (" at "); | |
3647 | print_address_numeric (b->address, 1, gdb_stdout); | |
3648 | } | |
3649 | if (b->source_file) | |
3650 | printf_filtered (": file %s, line %d.", | |
3651 | b->source_file, b->line_number); | |
3652 | TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, b, 1)); | |
3653 | TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos)); | |
3654 | } | |
3655 | printf_filtered ("\n"); | |
3656 | } | |
3657 | ||
3658 | \f | |
3659 | /* Set a breakpoint according to ARG (function, linenum or *address) | |
3660 | flag: first bit : 0 non-temporary, 1 temporary. | |
3661 | second bit : 0 normal breakpoint, 1 hardware breakpoint. */ | |
3662 | ||
3663 | static void | |
3664 | break_command_1 (arg, flag, from_tty) | |
3665 | char *arg; | |
3666 | int flag, from_tty; | |
3667 | { | |
3668 | int tempflag, hardwareflag; | |
3669 | struct symtabs_and_lines sals; | |
3670 | struct symtab_and_line sal; | |
3671 | register struct expression *cond = 0; | |
3672 | register struct breakpoint *b; | |
3673 | ||
3674 | /* Pointers in arg to the start, and one past the end, of the condition. */ | |
3675 | char *cond_start = NULL; | |
3676 | char *cond_end = NULL; | |
3677 | /* Pointers in arg to the start, and one past the end, | |
3678 | of the address part. */ | |
3679 | char *addr_start = NULL; | |
3680 | char *addr_end = NULL; | |
3681 | struct cleanup *old_chain; | |
3682 | struct cleanup *canonical_strings_chain = NULL; | |
3683 | char **canonical = (char **)NULL; | |
3684 | int i; | |
3685 | int thread; | |
3686 | ||
3687 | hardwareflag = flag & BP_HARDWAREFLAG; | |
3688 | tempflag = flag & BP_TEMPFLAG; | |
3689 | ||
3690 | sals.sals = NULL; | |
3691 | sals.nelts = 0; | |
3692 | ||
3693 | INIT_SAL (&sal); /* initialize to zeroes */ | |
3694 | ||
3695 | /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ | |
3696 | ||
3697 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
3698 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
3699 | { | |
3700 | if (default_breakpoint_valid) | |
3701 | { | |
3702 | sals.sals = (struct symtab_and_line *) | |
3703 | xmalloc (sizeof (struct symtab_and_line)); | |
3704 | sal.pc = default_breakpoint_address; | |
3705 | sal.line = default_breakpoint_line; | |
3706 | sal.symtab = default_breakpoint_symtab; | |
3707 | sal.section = find_pc_overlay (sal.pc); | |
3708 | sals.sals[0] = sal; | |
3709 | sals.nelts = 1; | |
3710 | } | |
3711 | else | |
3712 | error ("No default breakpoint address now."); | |
3713 | } | |
3714 | else | |
3715 | { | |
3716 | addr_start = arg; | |
3717 | ||
3718 | /* Force almost all breakpoints to be in terms of the | |
3719 | current_source_symtab (which is decode_line_1's default). This | |
3720 | should produce the results we want almost all of the time while | |
3721 | leaving default_breakpoint_* alone. */ | |
3722 | if (default_breakpoint_valid | |
3723 | && (!current_source_symtab | |
3724 | || (arg && (*arg == '+' || *arg == '-')))) | |
3725 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
3726 | default_breakpoint_line, &canonical); | |
3727 | else | |
3728 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical); | |
3729 | ||
3730 | addr_end = arg; | |
3731 | } | |
3732 | ||
3733 | if (! sals.nelts) | |
3734 | return; | |
3735 | ||
3736 | /* Make sure that all storage allocated in decode_line_1 gets freed in case | |
3737 | the following `for' loop errors out. */ | |
3738 | old_chain = make_cleanup (free, sals.sals); | |
3739 | if (canonical != (char **)NULL) | |
3740 | { | |
3741 | make_cleanup (free, canonical); | |
3742 | canonical_strings_chain = make_cleanup (null_cleanup, 0); | |
3743 | for (i = 0; i < sals.nelts; i++) | |
3744 | { | |
3745 | if (canonical[i] != NULL) | |
3746 | make_cleanup (free, canonical[i]); | |
3747 | } | |
3748 | } | |
3749 | ||
3750 | thread = -1; /* No specific thread yet */ | |
3751 | ||
3752 | /* Resolve all line numbers to PC's, and verify that conditions | |
3753 | can be parsed, before setting any breakpoints. */ | |
3754 | for (i = 0; i < sals.nelts; i++) | |
3755 | { | |
3756 | char *tok, *end_tok; | |
3757 | int toklen; | |
3758 | ||
3759 | resolve_sal_pc (&sals.sals[i]); | |
3760 | ||
3761 | /* It's possible for the PC to be nonzero, but still an illegal | |
3762 | value on some targets. | |
3763 | ||
3764 | For example, on HP-UX if you start gdb, and before running the | |
3765 | inferior you try to set a breakpoint on a shared library function | |
3766 | "foo" where the inferior doesn't call "foo" directly but does | |
3767 | pass its address to another function call, then we do find a | |
3768 | minimal symbol for the "foo", but it's address is invalid. | |
3769 | (Appears to be an index into a table that the loader sets up | |
3770 | when the inferior is run.) | |
3771 | ||
3772 | Give the target a chance to bless sals.sals[i].pc before we | |
3773 | try to make a breakpoint for it. */ | |
3774 | if (PC_REQUIRES_RUN_BEFORE_USE(sals.sals[i].pc)) | |
3775 | { | |
3776 | error ("Cannot break on %s without a running program.", addr_start); | |
3777 | } | |
3778 | ||
3779 | tok = arg; | |
3780 | ||
3781 | while (tok && *tok) | |
3782 | { | |
3783 | while (*tok == ' ' || *tok == '\t') | |
3784 | tok++; | |
3785 | ||
3786 | end_tok = tok; | |
3787 | ||
3788 | while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') | |
3789 | end_tok++; | |
3790 | ||
3791 | toklen = end_tok - tok; | |
3792 | ||
3793 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) | |
3794 | { | |
3795 | tok = cond_start = end_tok + 1; | |
3796 | cond = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); | |
3797 | cond_end = tok; | |
3798 | } | |
3799 | else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) | |
3800 | { | |
3801 | char *tmptok; | |
3802 | ||
3803 | tok = end_tok + 1; | |
3804 | tmptok = tok; | |
3805 | thread = strtol (tok, &tok, 0); | |
3806 | if (tok == tmptok) | |
3807 | error ("Junk after thread keyword."); | |
3808 | if (!valid_thread_id (thread)) | |
3809 | error ("Unknown thread %d\n", thread); | |
3810 | } | |
3811 | else | |
3812 | error ("Junk at end of arguments."); | |
3813 | } | |
3814 | } | |
3815 | if (hardwareflag) | |
3816 | { | |
3817 | int i, target_resources_ok; | |
3818 | ||
3819 | i = hw_breakpoint_used_count (); | |
3820 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT ( | |
3821 | bp_hardware_breakpoint, i + sals.nelts, 0); | |
3822 | if (target_resources_ok == 0) | |
3823 | error ("No hardware breakpoint support in the target."); | |
3824 | else if (target_resources_ok < 0) | |
3825 | error ("Hardware breakpoints used exceeds limit."); | |
3826 | } | |
3827 | ||
3828 | /* Remove the canonical strings from the cleanup, they are needed below. */ | |
3829 | if (canonical != (char **)NULL) | |
3830 | discard_cleanups (canonical_strings_chain); | |
3831 | ||
3832 | /* Now set all the breakpoints. */ | |
3833 | for (i = 0; i < sals.nelts; i++) | |
3834 | { | |
3835 | sal = sals.sals[i]; | |
3836 | ||
3837 | if (from_tty) | |
3838 | describe_other_breakpoints (sal.pc, sal.section); | |
3839 | ||
3840 | b = set_raw_breakpoint (sal); | |
3841 | set_breakpoint_count (breakpoint_count + 1); | |
3842 | b->number = breakpoint_count; | |
3843 | b->type = hardwareflag ? bp_hardware_breakpoint : bp_breakpoint; | |
3844 | b->cond = cond; | |
3845 | b->thread = thread; | |
3846 | ||
3847 | /* If a canonical line spec is needed use that instead of the | |
3848 | command string. */ | |
3849 | if (canonical != (char **)NULL && canonical[i] != NULL) | |
3850 | b->addr_string = canonical[i]; | |
3851 | else if (addr_start) | |
3852 | b->addr_string = savestring (addr_start, addr_end - addr_start); | |
3853 | if (cond_start) | |
3854 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |
3855 | ||
3856 | b->enable = enabled; | |
3857 | b->disposition = tempflag ? del : donttouch; | |
3858 | mention (b); | |
3859 | } | |
3860 | ||
3861 | if (sals.nelts > 1) | |
3862 | { | |
3863 | printf_filtered ("Multiple breakpoints were set.\n"); | |
3864 | printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
3865 | } | |
3866 | do_cleanups (old_chain); | |
3867 | } | |
3868 | ||
3869 | static void | |
3870 | break_at_finish_at_depth_command_1 (arg, flag, from_tty) | |
3871 | char *arg; | |
3872 | int flag; | |
3873 | int from_tty; | |
3874 | { | |
3875 | struct frame_info *frame; | |
3876 | CORE_ADDR low, high, selected_pc = 0; | |
3877 | char *extra_args, *level_arg, *addr_string; | |
3878 | int extra_args_len = 0, if_arg = 0; | |
3879 | ||
3880 | if (!arg || | |
3881 | (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t'))) | |
3882 | { | |
3883 | ||
3884 | if (default_breakpoint_valid) | |
3885 | { | |
3886 | if (selected_frame) | |
3887 | { | |
3888 | selected_pc = selected_frame->pc; | |
3889 | if (arg) | |
3890 | if_arg = 1; | |
3891 | } | |
3892 | else | |
3893 | error ("No selected frame."); | |
3894 | } | |
3895 | else | |
3896 | error ("No default breakpoint address now."); | |
3897 | } | |
3898 | else | |
3899 | { | |
3900 | extra_args = strchr (arg, ' '); | |
3901 | if (extra_args) | |
3902 | { | |
3903 | extra_args++; | |
3904 | extra_args_len = strlen (extra_args); | |
3905 | level_arg = (char *) xmalloc (extra_args - arg); | |
3906 | strncpy (level_arg, arg, extra_args - arg - 1); | |
3907 | level_arg[extra_args - arg - 1] = '\0'; | |
3908 | } | |
3909 | else | |
3910 | { | |
3911 | level_arg = (char *) xmalloc (strlen (arg) + 1); | |
3912 | strcpy (level_arg, arg); | |
3913 | } | |
3914 | ||
3915 | frame = parse_frame_specification (level_arg); | |
3916 | if (frame) | |
3917 | selected_pc = frame->pc; | |
3918 | else | |
3919 | selected_pc = 0; | |
3920 | } | |
3921 | if (if_arg) | |
3922 | { | |
3923 | extra_args = arg; | |
3924 | extra_args_len = strlen (arg); | |
3925 | } | |
3926 | ||
3927 | if (selected_pc) | |
3928 | { | |
3929 | if (find_pc_partial_function(selected_pc, (char **)NULL, &low, &high)) | |
3930 | { | |
3931 | addr_string = (char *) xmalloc (26 + extra_args_len); | |
3932 | if (extra_args_len) | |
3933 | sprintf (addr_string, "*0x%x %s", high, extra_args); | |
3934 | else | |
3935 | sprintf (addr_string, "*0x%x", high); | |
3936 | break_command_1 (addr_string, flag, from_tty); | |
3937 | free (addr_string); | |
3938 | } | |
3939 | else | |
3940 | error ("No function contains the specified address"); | |
3941 | } | |
3942 | else | |
3943 | error ("Unable to set breakpoint at procedure exit"); | |
3944 | } | |
3945 | ||
3946 | ||
3947 | static void | |
3948 | break_at_finish_command_1 (arg, flag, from_tty) | |
3949 | char *arg; | |
3950 | int flag; | |
3951 | int from_tty; | |
3952 | { | |
3953 | char *addr_string, *break_string, *beg_addr_string; | |
3954 | CORE_ADDR low, high; | |
3955 | struct symtabs_and_lines sals; | |
3956 | struct symtab_and_line sal; | |
3957 | struct cleanup *old_chain; | |
3958 | char *extra_args; | |
3959 | int extra_args_len = 0; | |
3960 | int i, if_arg = 0; | |
3961 | ||
3962 | if (!arg || | |
3963 | (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t'))) | |
3964 | { | |
3965 | if (default_breakpoint_valid) | |
3966 | { | |
3967 | if (selected_frame) | |
3968 | { | |
3969 | addr_string = (char *) xmalloc (15); | |
3970 | sprintf (addr_string, "*0x%x", selected_frame->pc); | |
3971 | if (arg) | |
3972 | if_arg = 1; | |
3973 | } | |
3974 | else | |
3975 | error ("No selected frame."); | |
3976 | } | |
3977 | else | |
3978 | error ("No default breakpoint address now."); | |
3979 | } | |
3980 | else | |
3981 | { | |
3982 | addr_string = (char *) xmalloc (strlen (arg) + 1); | |
3983 | strcpy (addr_string, arg); | |
3984 | } | |
3985 | ||
3986 | if (if_arg) | |
3987 | { | |
3988 | extra_args = arg; | |
3989 | extra_args_len = strlen (arg); | |
3990 | } | |
3991 | else | |
3992 | if (arg) | |
3993 | { | |
3994 | /* get the stuff after the function name or address */ | |
3995 | extra_args = strchr (arg, ' '); | |
3996 | if (extra_args) | |
3997 | { | |
3998 | extra_args++; | |
3999 | extra_args_len = strlen (extra_args); | |
4000 | } | |
4001 | } | |
4002 | ||
4003 | sals.sals = NULL; | |
4004 | sals.nelts = 0; | |
4005 | ||
4006 | beg_addr_string = addr_string; | |
4007 | sals = decode_line_1 (&addr_string, 1, (struct symtab *)NULL, 0, | |
4008 | (char ***)NULL); | |
4009 | ||
4010 | free (beg_addr_string); | |
4011 | old_chain = make_cleanup (free, sals.sals); | |
4012 | for (i = 0; (i < sals.nelts); i++) | |
4013 | { | |
4014 | sal = sals.sals[i]; | |
4015 | if (find_pc_partial_function (sal.pc, (char **)NULL, &low, &high)) | |
4016 | { | |
4017 | break_string = (char *) xmalloc (extra_args_len + 26); | |
4018 | if (extra_args_len) | |
4019 | sprintf (break_string, "*0x%x %s", high, extra_args); | |
4020 | else | |
4021 | sprintf (break_string, "*0x%x", high); | |
4022 | break_command_1 (break_string, flag, from_tty); | |
4023 | free(break_string); | |
4024 | } | |
4025 | else | |
4026 | error ("No function contains the specified address"); | |
4027 | } | |
4028 | if (sals.nelts > 1) | |
4029 | { | |
4030 | printf_filtered ("Multiple breakpoints were set.\n"); | |
4031 | printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
4032 | } | |
4033 | do_cleanups(old_chain); | |
4034 | } | |
4035 | ||
4036 | ||
4037 | /* Helper function for break_command_1 and disassemble_command. */ | |
4038 | ||
4039 | void | |
4040 | resolve_sal_pc (sal) | |
4041 | struct symtab_and_line *sal; | |
4042 | { | |
4043 | CORE_ADDR pc; | |
4044 | ||
4045 | if (sal->pc == 0 && sal->symtab != NULL) | |
4046 | { | |
4047 | if (!find_line_pc (sal->symtab, sal->line, &pc)) | |
4048 | error ("No line %d in file \"%s\".", | |
4049 | sal->line, sal->symtab->filename); | |
4050 | sal->pc = pc; | |
4051 | } | |
4052 | ||
4053 | if (sal->section == 0 && sal->symtab != NULL) | |
4054 | { | |
4055 | struct blockvector *bv; | |
4056 | struct block *b; | |
4057 | struct symbol *sym; | |
4058 | int index; | |
4059 | ||
4060 | bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab); | |
4061 | if (bv != NULL) | |
4062 | { | |
4063 | b = BLOCKVECTOR_BLOCK (bv, index); | |
4064 | sym = block_function (b); | |
4065 | if (sym != NULL) | |
4066 | { | |
4067 | fixup_symbol_section (sym, sal->symtab->objfile); | |
4068 | sal->section = SYMBOL_BFD_SECTION (sym); | |
4069 | } | |
4070 | else | |
4071 | { | |
4072 | /* It really is worthwhile to have the section, so we'll just | |
4073 | have to look harder. This case can be executed if we have | |
4074 | line numbers but no functions (as can happen in assembly | |
4075 | source). */ | |
4076 | ||
4077 | struct minimal_symbol *msym; | |
4078 | ||
4079 | msym = lookup_minimal_symbol_by_pc (sal->pc); | |
4080 | if (msym) | |
4081 | sal->section = SYMBOL_BFD_SECTION (msym); | |
4082 | } | |
4083 | } | |
4084 | } | |
4085 | } | |
4086 | ||
4087 | void | |
4088 | break_command (arg, from_tty) | |
4089 | char *arg; | |
4090 | int from_tty; | |
4091 | { | |
4092 | break_command_1 (arg, 0, from_tty); | |
4093 | } | |
4094 | ||
4095 | void | |
4096 | break_at_finish_command (arg, from_tty) | |
4097 | char *arg; | |
4098 | int from_tty; | |
4099 | { | |
4100 | break_at_finish_command_1 (arg, 0, from_tty); | |
4101 | } | |
4102 | ||
4103 | void | |
4104 | break_at_finish_at_depth_command (arg, from_tty) | |
4105 | char *arg; | |
4106 | int from_tty; | |
4107 | { | |
4108 | break_at_finish_at_depth_command_1 (arg, 0, from_tty); | |
4109 | } | |
4110 | ||
4111 | void | |
4112 | tbreak_command (arg, from_tty) | |
4113 | char *arg; | |
4114 | int from_tty; | |
4115 | { | |
4116 | break_command_1 (arg, BP_TEMPFLAG, from_tty); | |
4117 | } | |
4118 | ||
4119 | void | |
4120 | tbreak_at_finish_command (arg, from_tty) | |
4121 | char *arg; | |
4122 | int from_tty; | |
4123 | { | |
4124 | break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty); | |
4125 | } | |
4126 | ||
4127 | static void | |
4128 | hbreak_command (arg, from_tty) | |
4129 | char *arg; | |
4130 | int from_tty; | |
4131 | { | |
4132 | break_command_1 (arg, BP_HARDWAREFLAG, from_tty); | |
4133 | } | |
4134 | ||
4135 | static void | |
4136 | thbreak_command (arg, from_tty) | |
4137 | char *arg; | |
4138 | int from_tty; | |
4139 | { | |
4140 | break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty); | |
4141 | } | |
4142 | ||
4143 | static void | |
4144 | stop_command (arg, from_tty) | |
4145 | char *arg; | |
4146 | int from_tty; | |
4147 | { | |
4148 | printf_filtered ("Specify the type of breakpoint to set.\n\ | |
4149 | Usage: stop in <function | address>\n\ | |
4150 | stop at <line>\n"); | |
4151 | } | |
4152 | ||
4153 | static void | |
4154 | stopin_command (arg, from_tty) | |
4155 | char *arg; | |
4156 | int from_tty; | |
4157 | { | |
4158 | int badInput = 0; | |
4159 | ||
4160 | if (arg == (char *)NULL) | |
4161 | badInput = 1; | |
4162 | else if (*arg != '*') | |
4163 | { | |
4164 | char *argptr = arg; | |
4165 | int hasColon = 0; | |
4166 | ||
4167 | /* look for a ':'. If this is a line number specification, then say | |
4168 | it is bad, otherwise, it should be an address or function/method | |
4169 | name */ | |
4170 | while (*argptr && !hasColon) | |
4171 | { | |
4172 | hasColon = (*argptr == ':'); | |
4173 | argptr++; | |
4174 | } | |
4175 | ||
4176 | if (hasColon) | |
4177 | badInput = (*argptr != ':'); /* Not a class::method */ | |
4178 | else | |
4179 | badInput = isdigit(*arg); /* a simple line number */ | |
4180 | } | |
4181 | ||
4182 | if (badInput) | |
4183 | printf_filtered("Usage: stop in <function | address>\n"); | |
4184 | else | |
4185 | break_command_1 (arg, 0, from_tty); | |
4186 | } | |
4187 | ||
4188 | static void | |
4189 | stopat_command (arg, from_tty) | |
4190 | char *arg; | |
4191 | int from_tty; | |
4192 | { | |
4193 | int badInput = 0; | |
4194 | ||
4195 | if (arg == (char *)NULL || *arg == '*') /* no line number */ | |
4196 | badInput = 1; | |
4197 | else | |
4198 | { | |
4199 | char *argptr = arg; | |
4200 | int hasColon = 0; | |
4201 | ||
4202 | /* look for a ':'. If there is a '::' then get out, otherwise | |
4203 | it is probably a line number. */ | |
4204 | while (*argptr && !hasColon) | |
4205 | { | |
4206 | hasColon = (*argptr == ':'); | |
4207 | argptr++; | |
4208 | } | |
4209 | ||
4210 | if (hasColon) | |
4211 | badInput = (*argptr == ':'); /* we have class::method */ | |
4212 | else | |
4213 | badInput = !isdigit(*arg); /* not a line number */ | |
4214 | } | |
4215 | ||
4216 | if (badInput) | |
4217 | printf_filtered("Usage: stop at <line>\n"); | |
4218 | else | |
4219 | break_command_1 (arg, 0, from_tty); | |
4220 | } | |
4221 | ||
4222 | /* ARGSUSED */ | |
4223 | /* accessflag: 0: watch write, 1: watch read, 2: watch access(read or write) */ | |
4224 | static void | |
4225 | watch_command_1 (arg, accessflag, from_tty) | |
4226 | char *arg; | |
4227 | int accessflag; | |
4228 | int from_tty; | |
4229 | { | |
4230 | struct breakpoint *b; | |
4231 | struct symtab_and_line sal; | |
4232 | struct expression *exp; | |
4233 | struct block *exp_valid_block; | |
4234 | struct value *val, *mark; | |
4235 | struct frame_info *frame; | |
4236 | struct frame_info *prev_frame = NULL; | |
4237 | char *exp_start = NULL; | |
4238 | char *exp_end = NULL; | |
4239 | char *tok, *end_tok; | |
4240 | int toklen; | |
4241 | char *cond_start = NULL; | |
4242 | char *cond_end = NULL; | |
4243 | struct expression *cond = NULL; | |
4244 | int i, other_type_used, target_resources_ok = 0; | |
4245 | enum bptype bp_type; | |
4246 | int mem_cnt = 0; | |
4247 | ||
4248 | INIT_SAL (&sal); /* initialize to zeroes */ | |
4249 | ||
4250 | /* Parse arguments. */ | |
4251 | innermost_block = NULL; | |
4252 | exp_start = arg; | |
4253 | exp = parse_exp_1 (&arg, 0, 0); | |
4254 | exp_end = arg; | |
4255 | exp_valid_block = innermost_block; | |
4256 | mark = value_mark (); | |
4257 | val = evaluate_expression (exp); | |
4258 | release_value (val); | |
4259 | if (VALUE_LAZY (val)) | |
4260 | value_fetch_lazy (val); | |
4261 | ||
4262 | tok = arg; | |
4263 | while (*tok == ' ' || *tok == '\t') | |
4264 | tok++; | |
4265 | end_tok = tok; | |
4266 | ||
4267 | while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') | |
4268 | end_tok++; | |
4269 | ||
4270 | toklen = end_tok - tok; | |
4271 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) | |
4272 | { | |
4273 | tok = cond_start = end_tok + 1; | |
4274 | cond = parse_exp_1 (&tok, 0, 0); | |
4275 | cond_end = tok; | |
4276 | } | |
4277 | if (*tok) | |
4278 | error("Junk at end of command."); | |
4279 | ||
4280 | if (accessflag == 1) bp_type = bp_read_watchpoint; | |
4281 | else if (accessflag == 2) bp_type = bp_access_watchpoint; | |
4282 | else bp_type = bp_hardware_watchpoint; | |
4283 | ||
4284 | mem_cnt = can_use_hardware_watchpoint (val); | |
4285 | if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint) | |
4286 | error ("Expression cannot be implemented with read/access watchpoint."); | |
4287 | if (mem_cnt != 0) { | |
4288 | i = hw_watchpoint_used_count (bp_type, &other_type_used); | |
4289 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT( | |
4290 | bp_type, i + mem_cnt, other_type_used); | |
4291 | if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint) | |
4292 | error ("Target does not have this type of hardware watchpoint support."); | |
4293 | if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint) | |
4294 | error ("Target resources have been allocated for other types of watchpoints."); | |
4295 | } | |
4296 | ||
4297 | #if defined(HPUXHPPA) | |
4298 | /* On HP-UX if you set a h/w | |
4299 | watchpoint before the "run" command, the inferior dies with a e.g., | |
4300 | SIGILL once you start it. I initially believed this was due to a | |
4301 | bad interaction between page protection traps and the initial | |
4302 | startup sequence by the dynamic linker. | |
4303 | ||
4304 | However, I tried avoiding that by having HP-UX's implementation of | |
4305 | TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_pid | |
4306 | yet, which forced slow watches before a "run" or "attach", and it | |
4307 | still fails somewhere in the startup code. | |
4308 | ||
4309 | Until I figure out what's happening, I'm disallowing watches altogether | |
4310 | before the "run" or "attach" command. We'll tell the user they must | |
4311 | set watches after getting the program started. */ | |
4312 | if (! target_has_execution) | |
4313 | { | |
4314 | warning ("can't do that without a running program; try \"break main\", \"run\" first"); | |
4315 | return; | |
4316 | } | |
4317 | #endif /* HPUXHPPA */ | |
4318 | ||
4319 | /* Now set up the breakpoint. */ | |
4320 | b = set_raw_breakpoint (sal); | |
4321 | set_breakpoint_count (breakpoint_count + 1); | |
4322 | b->number = breakpoint_count; | |
4323 | b->disposition = donttouch; | |
4324 | b->exp = exp; | |
4325 | b->exp_valid_block = exp_valid_block; | |
4326 | b->exp_string = savestring (exp_start, exp_end - exp_start); | |
4327 | b->val = val; | |
4328 | b->cond = cond; | |
4329 | if (cond_start) | |
4330 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |
4331 | else | |
4332 | b->cond_string = 0; | |
4333 | ||
4334 | frame = block_innermost_frame (exp_valid_block); | |
4335 | if (frame) | |
4336 | { | |
4337 | prev_frame = get_prev_frame (frame); | |
4338 | b->watchpoint_frame = frame->frame; | |
4339 | } | |
4340 | else | |
4341 | b->watchpoint_frame = (CORE_ADDR)0; | |
4342 | ||
4343 | if (mem_cnt && target_resources_ok > 0) | |
4344 | b->type = bp_type; | |
4345 | else | |
4346 | b->type = bp_watchpoint; | |
4347 | ||
4348 | /* If the expression is "local", then set up a "watchpoint scope" | |
4349 | breakpoint at the point where we've left the scope of the watchpoint | |
4350 | expression. */ | |
4351 | if (innermost_block) | |
4352 | { | |
4353 | if (prev_frame) | |
4354 | { | |
4355 | struct breakpoint *scope_breakpoint; | |
4356 | struct symtab_and_line scope_sal; | |
4357 | ||
4358 | INIT_SAL (&scope_sal); /* initialize to zeroes */ | |
4359 | scope_sal.pc = get_frame_pc (prev_frame); | |
4360 | scope_sal.section = find_pc_overlay (scope_sal.pc); | |
4361 | ||
4362 | scope_breakpoint = set_raw_breakpoint (scope_sal); | |
4363 | set_breakpoint_count (breakpoint_count + 1); | |
4364 | scope_breakpoint->number = breakpoint_count; | |
4365 | ||
4366 | scope_breakpoint->type = bp_watchpoint_scope; | |
4367 | scope_breakpoint->enable = enabled; | |
4368 | ||
4369 | /* Automatically delete the breakpoint when it hits. */ | |
4370 | scope_breakpoint->disposition = del; | |
4371 | ||
4372 | /* Only break in the proper frame (help with recursion). */ | |
4373 | scope_breakpoint->frame = prev_frame->frame; | |
4374 | ||
4375 | /* Set the address at which we will stop. */ | |
4376 | scope_breakpoint->address = get_frame_pc (prev_frame); | |
4377 | ||
4378 | /* The scope breakpoint is related to the watchpoint. We | |
4379 | will need to act on them together. */ | |
4380 | b->related_breakpoint = scope_breakpoint; | |
4381 | } | |
4382 | } | |
4383 | value_free_to_mark (mark); | |
4384 | mention (b); | |
4385 | } | |
4386 | ||
4387 | /* Return count of locations need to be watched and can be handled | |
4388 | in hardware. If the watchpoint can not be handled | |
4389 | in hardware return zero. */ | |
4390 | ||
4391 | #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT) | |
4392 | #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_size) \ | |
4393 | ((byte_size) <= (REGISTER_SIZE)) | |
4394 | #endif | |
4395 | ||
4396 | static int | |
4397 | can_use_hardware_watchpoint (v) | |
4398 | struct value *v; | |
4399 | { | |
4400 | int found_memory_cnt = 0; | |
4401 | ||
4402 | /* Did the user specifically forbid us to use hardware watchpoints? */ | |
4403 | if (! can_use_hw_watchpoints) | |
4404 | return 0; | |
4405 | ||
4406 | /* Make sure all the intermediate values are in memory. Also make sure | |
4407 | we found at least one memory expression. Guards against watch 0x12345, | |
4408 | which is meaningless, but could cause errors if one tries to insert a | |
4409 | hardware watchpoint for the constant expression. */ | |
4410 | for ( ; v; v = v->next) | |
4411 | { | |
4412 | if (v->lval == lval_memory) | |
4413 | { | |
4414 | if (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT (TYPE_LENGTH (VALUE_TYPE (v)))) | |
4415 | found_memory_cnt++; | |
4416 | } | |
4417 | else if (v->lval != not_lval && v->modifiable == 0) | |
4418 | return 0; | |
4419 | } | |
4420 | ||
4421 | /* The expression itself looks suitable for using a hardware | |
4422 | watchpoint, but give the target machine a chance to reject it. */ | |
4423 | return found_memory_cnt; | |
4424 | } | |
4425 | ||
4426 | static void watch_command (arg, from_tty) | |
4427 | char *arg; | |
4428 | int from_tty; | |
4429 | { | |
4430 | watch_command_1 (arg, 0, from_tty); | |
4431 | } | |
4432 | ||
4433 | static void rwatch_command (arg, from_tty) | |
4434 | char *arg; | |
4435 | int from_tty; | |
4436 | { | |
4437 | watch_command_1 (arg, 1, from_tty); | |
4438 | } | |
4439 | ||
4440 | static void awatch_command (arg, from_tty) | |
4441 | char *arg; | |
4442 | int from_tty; | |
4443 | { | |
4444 | watch_command_1 (arg, 2, from_tty); | |
4445 | } | |
4446 | ||
4447 | \f | |
4448 | /* Helper routine for the until_command routine in infcmd.c. Here | |
4449 | because it uses the mechanisms of breakpoints. */ | |
4450 | ||
4451 | /* ARGSUSED */ | |
4452 | void | |
4453 | until_break_command (arg, from_tty) | |
4454 | char *arg; | |
4455 | int from_tty; | |
4456 | { | |
4457 | struct symtabs_and_lines sals; | |
4458 | struct symtab_and_line sal; | |
4459 | struct frame_info *prev_frame = get_prev_frame (selected_frame); | |
4460 | struct breakpoint *breakpoint; | |
4461 | struct cleanup *old_chain; | |
4462 | ||
4463 | clear_proceed_status (); | |
4464 | ||
4465 | /* Set a breakpoint where the user wants it and at return from | |
4466 | this function */ | |
4467 | ||
4468 | if (default_breakpoint_valid) | |
4469 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |
4470 | default_breakpoint_line, (char ***)NULL); | |
4471 | else | |
4472 | sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL); | |
4473 | ||
4474 | if (sals.nelts != 1) | |
4475 | error ("Couldn't get information on specified line."); | |
4476 | ||
4477 | sal = sals.sals[0]; | |
4478 | free ((PTR)sals.sals); /* malloc'd, so freed */ | |
4479 | ||
4480 | if (*arg) | |
4481 | error ("Junk at end of arguments."); | |
4482 | ||
4483 | resolve_sal_pc (&sal); | |
4484 | ||
4485 | breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); | |
4486 | ||
4487 | old_chain = make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint); | |
4488 | ||
4489 | /* Keep within the current frame */ | |
4490 | ||
4491 | if (prev_frame) | |
4492 | { | |
4493 | sal = find_pc_line (prev_frame->pc, 0); | |
4494 | sal.pc = prev_frame->pc; | |
4495 | breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); | |
4496 | make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint); | |
4497 | } | |
4498 | ||
4499 | proceed (-1, TARGET_SIGNAL_DEFAULT, 0); | |
4500 | do_cleanups(old_chain); | |
4501 | } | |
4502 | \f | |
4503 | #if 0 | |
4504 | /* These aren't used; I don't konw what they were for. */ | |
4505 | /* Set a breakpoint at the catch clause for NAME. */ | |
4506 | static int | |
4507 | catch_breakpoint (name) | |
4508 | char *name; | |
4509 | { | |
4510 | } | |
4511 | ||
4512 | static int | |
4513 | disable_catch_breakpoint () | |
4514 | { | |
4515 | } | |
4516 | ||
4517 | static int | |
4518 | delete_catch_breakpoint () | |
4519 | { | |
4520 | } | |
4521 | ||
4522 | static int | |
4523 | enable_catch_breakpoint () | |
4524 | { | |
4525 | } | |
4526 | #endif /* 0 */ | |
4527 | ||
4528 | struct sal_chain | |
4529 | { | |
4530 | struct sal_chain *next; | |
4531 | struct symtab_and_line sal; | |
4532 | }; | |
4533 | ||
4534 | /* Not really used -- invocation in handle_gnu_4_16_catch_command | |
4535 | had been commented out in the v.4.16 sources, and stays | |
4536 | disabled there now because "catch NAME" syntax isn't allowed. | |
4537 | pai/1997-07-11 */ | |
4538 | /* This isn't used; I don't know what it was for. */ | |
4539 | /* For each catch clause identified in ARGS, run FUNCTION | |
4540 | with that clause as an argument. */ | |
4541 | static struct symtabs_and_lines | |
4542 | map_catch_names (args, function) | |
4543 | char *args; | |
4544 | int (*function)(); | |
4545 | { | |
4546 | register char *p = args; | |
4547 | register char *p1; | |
4548 | struct symtabs_and_lines sals; | |
4549 | #if 0 | |
4550 | struct sal_chain *sal_chain = 0; | |
4551 | #endif | |
4552 | ||
4553 | if (p == 0) | |
4554 | error_no_arg ("one or more catch names"); | |
4555 | ||
4556 | sals.nelts = 0; | |
4557 | sals.sals = NULL; | |
4558 | ||
4559 | while (*p) | |
4560 | { | |
4561 | p1 = p; | |
4562 | /* Don't swallow conditional part. */ | |
4563 | if (p1[0] == 'i' && p1[1] == 'f' | |
4564 | && (p1[2] == ' ' || p1[2] == '\t')) | |
4565 | break; | |
4566 | ||
4567 | if (isalpha (*p1)) | |
4568 | { | |
4569 | p1++; | |
4570 | while (isalnum (*p1) || *p1 == '_' || *p1 == '$') | |
4571 | p1++; | |
4572 | } | |
4573 | ||
4574 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
4575 | error ("Arguments must be catch names."); | |
4576 | ||
4577 | *p1 = 0; | |
4578 | #if 0 | |
4579 | if (function (p)) | |
4580 | { | |
4581 | struct sal_chain *next = (struct sal_chain *) | |
4582 | alloca (sizeof (struct sal_chain)); | |
4583 | next->next = sal_chain; | |
4584 | next->sal = get_catch_sal (p); | |
4585 | sal_chain = next; | |
4586 | goto win; | |
4587 | } | |
4588 | #endif | |
4589 | printf_unfiltered ("No catch clause for exception %s.\n", p); | |
4590 | #if 0 | |
4591 | win: | |
4592 | #endif | |
4593 | p = p1; | |
4594 | while (*p == ' ' || *p == '\t') p++; | |
4595 | } | |
4596 | } | |
4597 | ||
4598 | /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ | |
4599 | ||
4600 | static struct symtabs_and_lines | |
4601 | get_catch_sals (this_level_only) | |
4602 | int this_level_only; | |
4603 | { | |
4604 | register struct blockvector *bl; | |
4605 | register struct block *block; | |
4606 | int index, have_default = 0; | |
4607 | CORE_ADDR pc; | |
4608 | struct symtabs_and_lines sals; | |
4609 | struct sal_chain *sal_chain = 0; | |
4610 | char *blocks_searched; | |
4611 | ||
4612 | /* Not sure whether an error message is always the correct response, | |
4613 | but it's better than a core dump. */ | |
4614 | if (selected_frame == NULL) | |
4615 | error ("No selected frame."); | |
4616 | block = get_frame_block (selected_frame); | |
4617 | pc = selected_frame->pc; | |
4618 | ||
4619 | sals.nelts = 0; | |
4620 | sals.sals = NULL; | |
4621 | ||
4622 | if (block == 0) | |
4623 | error ("No symbol table info available.\n"); | |
4624 | ||
4625 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); | |
4626 | blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
4627 | memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); | |
4628 | ||
4629 | while (block != 0) | |
4630 | { | |
4631 | CORE_ADDR end = BLOCK_END (block) - 4; | |
4632 | int last_index; | |
4633 | ||
4634 | if (bl != blockvector_for_pc (end, &index)) | |
4635 | error ("blockvector blotch"); | |
4636 | if (BLOCKVECTOR_BLOCK (bl, index) != block) | |
4637 | error ("blockvector botch"); | |
4638 | last_index = BLOCKVECTOR_NBLOCKS (bl); | |
4639 | index += 1; | |
4640 | ||
4641 | /* Don't print out blocks that have gone by. */ | |
4642 | while (index < last_index | |
4643 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) | |
4644 | index++; | |
4645 | ||
4646 | while (index < last_index | |
4647 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) | |
4648 | { | |
4649 | if (blocks_searched[index] == 0) | |
4650 | { | |
4651 | struct block *b = BLOCKVECTOR_BLOCK (bl, index); | |
4652 | int nsyms; | |
4653 | register int i; | |
4654 | register struct symbol *sym; | |
4655 | ||
4656 | nsyms = BLOCK_NSYMS (b); | |
4657 | ||
4658 | for (i = 0; i < nsyms; i++) | |
4659 | { | |
4660 | sym = BLOCK_SYM (b, i); | |
4661 | if (STREQ (SYMBOL_NAME (sym), "default")) | |
4662 | { | |
4663 | if (have_default) | |
4664 | continue; | |
4665 | have_default = 1; | |
4666 | } | |
4667 | if (SYMBOL_CLASS (sym) == LOC_LABEL) | |
4668 | { | |
4669 | struct sal_chain *next = (struct sal_chain *) | |
4670 | alloca (sizeof (struct sal_chain)); | |
4671 | next->next = sal_chain; | |
4672 | next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); | |
4673 | sal_chain = next; | |
4674 | } | |
4675 | } | |
4676 | blocks_searched[index] = 1; | |
4677 | } | |
4678 | index++; | |
4679 | } | |
4680 | if (have_default) | |
4681 | break; | |
4682 | if (sal_chain && this_level_only) | |
4683 | break; | |
4684 | ||
4685 | /* After handling the function's top-level block, stop. | |
4686 | Don't continue to its superblock, the block of | |
4687 | per-file symbols. */ | |
4688 | if (BLOCK_FUNCTION (block)) | |
4689 | break; | |
4690 | block = BLOCK_SUPERBLOCK (block); | |
4691 | } | |
4692 | ||
4693 | if (sal_chain) | |
4694 | { | |
4695 | struct sal_chain *tmp_chain; | |
4696 | ||
4697 | /* Count the number of entries. */ | |
4698 | for (index = 0, tmp_chain = sal_chain; tmp_chain; | |
4699 | tmp_chain = tmp_chain->next) | |
4700 | index++; | |
4701 | ||
4702 | sals.nelts = index; | |
4703 | sals.sals = (struct symtab_and_line *) | |
4704 | xmalloc (index * sizeof (struct symtab_and_line)); | |
4705 | for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) | |
4706 | sals.sals[index] = sal_chain->sal; | |
4707 | } | |
4708 | ||
4709 | return sals; | |
4710 | } | |
4711 | ||
4712 | static void | |
4713 | ep_skip_leading_whitespace (s) | |
4714 | char ** s; | |
4715 | { | |
4716 | if ((s == NULL) || (*s == NULL)) | |
4717 | return; | |
4718 | while (isspace(**s)) | |
4719 | *s += 1; | |
4720 | } | |
4721 | ||
4722 | /* This function examines a string, and attempts to find a token | |
4723 | that might be an event name in the leading characters. If a | |
4724 | possible match is found, a pointer to the last character of | |
4725 | the token is returned. Else, NULL is returned. */ | |
4726 | static char * | |
4727 | ep_find_event_name_end (arg) | |
4728 | char * arg; | |
4729 | { | |
4730 | char * s = arg; | |
4731 | char * event_name_end = NULL; | |
4732 | ||
4733 | /* If we could depend upon the presense of strrpbrk, we'd use that... */ | |
4734 | if (arg == NULL) | |
4735 | return NULL; | |
4736 | ||
4737 | /* We break out of the loop when we find a token delimiter. | |
4738 | Basically, we're looking for alphanumerics and underscores; | |
4739 | anything else delimites the token. */ | |
4740 | while (*s != '\0') | |
4741 | { | |
4742 | if (! isalnum(*s) && (*s != '_')) | |
4743 | break; | |
4744 | event_name_end = s; | |
4745 | s++; | |
4746 | } | |
4747 | ||
4748 | return event_name_end; | |
4749 | } | |
4750 | ||
4751 | ||
4752 | /* This function attempts to parse an optional "if <cond>" clause | |
4753 | from the arg string. If one is not found, it returns NULL. | |
4754 | ||
4755 | Else, it returns a pointer to the condition string. (It does not | |
4756 | attempt to evaluate the string against a particular block.) And, | |
4757 | it updates arg to point to the first character following the parsed | |
4758 | if clause in the arg string. */ | |
4759 | static char * | |
4760 | ep_parse_optional_if_clause (arg) | |
4761 | char ** arg; | |
4762 | { | |
4763 | char * cond_string; | |
4764 | ||
4765 | if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace((*arg)[2])) | |
4766 | return NULL; | |
4767 | ||
4768 | /* Skip the "if" keyword. */ | |
4769 | (*arg) += 2; | |
4770 | ||
4771 | /* Skip any extra leading whitespace, and record the start of the | |
4772 | condition string. */ | |
4773 | ep_skip_leading_whitespace (arg); | |
4774 | cond_string = *arg; | |
4775 | ||
4776 | /* Assume that the condition occupies the remainder of the arg string. */ | |
4777 | (*arg) += strlen (cond_string); | |
4778 | ||
4779 | return cond_string; | |
4780 | } | |
4781 | ||
4782 | /* This function attempts to parse an optional filename from the arg | |
4783 | string. If one is not found, it returns NULL. | |
4784 | ||
4785 | Else, it returns a pointer to the parsed filename. (This function | |
4786 | makes no attempt to verify that a file of that name exists, or is | |
4787 | accessible.) And, it updates arg to point to the first character | |
4788 | following the parsed filename in the arg string. | |
4789 | ||
4790 | Note that clients needing to preserve the returned filename for | |
4791 | future access should copy it to their own buffers. */ | |
4792 | static char * | |
4793 | ep_parse_optional_filename (arg) | |
4794 | char ** arg; | |
4795 | { | |
4796 | static char filename [1024]; | |
4797 | char * arg_p = *arg; | |
4798 | int i; | |
4799 | char c; | |
4800 | ||
4801 | if ((*arg_p == '\0') || isspace (*arg_p)) | |
4802 | return NULL; | |
4803 | ||
4804 | for (i=0; ; i++) | |
4805 | { | |
4806 | c = *arg_p; | |
4807 | if (isspace (c)) | |
4808 | c = '\0'; | |
4809 | filename[i] = c; | |
4810 | if (c == '\0') | |
4811 | break; | |
4812 | arg_p++; | |
4813 | } | |
4814 | *arg = arg_p; | |
4815 | ||
4816 | return filename; | |
4817 | } | |
4818 | ||
4819 | /* Commands to deal with catching events, such as signals, exceptions, | |
4820 | process start/exit, etc. */ | |
4821 | ||
4822 | typedef enum {catch_fork, catch_vfork} catch_fork_kind; | |
4823 | ||
4824 | static void | |
4825 | catch_fork_command_1 (fork_kind, arg, tempflag, from_tty) | |
4826 | catch_fork_kind fork_kind; | |
4827 | char * arg; | |
4828 | int tempflag; | |
4829 | int from_tty; | |
4830 | { | |
4831 | char * cond_string = NULL; | |
4832 | ||
4833 | ep_skip_leading_whitespace (&arg); | |
4834 | ||
4835 | /* The allowed syntax is: | |
4836 | catch [v]fork | |
4837 | catch [v]fork if <cond> | |
4838 | ||
4839 | First, check if there's an if clause. */ | |
4840 | cond_string = ep_parse_optional_if_clause (&arg); | |
4841 | ||
4842 | if ((*arg != '\0') && !isspace (*arg)) | |
4843 | error ("Junk at end of arguments."); | |
4844 | ||
4845 | /* If this target supports it, create a fork or vfork catchpoint | |
4846 | and enable reporting of such events. */ | |
4847 | switch (fork_kind) { | |
4848 | case catch_fork : | |
4849 | create_fork_event_catchpoint (tempflag, cond_string); | |
4850 | break; | |
4851 | case catch_vfork : | |
4852 | create_vfork_event_catchpoint (tempflag, cond_string); | |
4853 | break; | |
4854 | default : | |
4855 | error ("unsupported or unknown fork kind; cannot catch it"); | |
4856 | break; | |
4857 | } | |
4858 | } | |
4859 | ||
4860 | static void | |
4861 | catch_exec_command_1 (arg, tempflag, from_tty) | |
4862 | char * arg; | |
4863 | int tempflag; | |
4864 | int from_tty; | |
4865 | { | |
4866 | char * cond_string = NULL; | |
4867 | ||
4868 | ep_skip_leading_whitespace (&arg); | |
4869 | ||
4870 | /* The allowed syntax is: | |
4871 | catch exec | |
4872 | catch exec if <cond> | |
4873 | ||
4874 | First, check if there's an if clause. */ | |
4875 | cond_string = ep_parse_optional_if_clause (&arg); | |
4876 | ||
4877 | if ((*arg != '\0') && !isspace (*arg)) | |
4878 | error ("Junk at end of arguments."); | |
4879 | ||
4880 | /* If this target supports it, create an exec catchpoint | |
4881 | and enable reporting of such events. */ | |
4882 | create_exec_event_catchpoint (tempflag, cond_string); | |
4883 | } | |
4884 | ||
4885 | #if defined(SOLIB_ADD) | |
4886 | static void | |
4887 | catch_load_command_1 (arg, tempflag, from_tty) | |
4888 | char * arg; | |
4889 | int tempflag; | |
4890 | int from_tty; | |
4891 | { | |
4892 | char * dll_pathname = NULL; | |
4893 | char * cond_string = NULL; | |
4894 | ||
4895 | ep_skip_leading_whitespace (&arg); | |
4896 | ||
4897 | /* The allowed syntax is: | |
4898 | catch load | |
4899 | catch load if <cond> | |
4900 | catch load <filename> | |
4901 | catch load <filename> if <cond> | |
4902 | ||
4903 | The user is not allowed to specify the <filename> after an | |
4904 | if clause. | |
4905 | ||
4906 | We'll ignore the pathological case of a file named "if". | |
4907 | ||
4908 | First, check if there's an if clause. If so, then there | |
4909 | cannot be a filename. */ | |
4910 | cond_string = ep_parse_optional_if_clause (&arg); | |
4911 | ||
4912 | /* If there was an if clause, then there cannot be a filename. | |
4913 | Else, there might be a filename and an if clause. */ | |
4914 | if (cond_string == NULL) | |
4915 | { | |
4916 | dll_pathname = ep_parse_optional_filename (&arg); | |
4917 | ep_skip_leading_whitespace (&arg); | |
4918 | cond_string = ep_parse_optional_if_clause (&arg); | |
4919 | } | |
4920 | ||
4921 | if ((*arg != '\0') && !isspace (*arg)) | |
4922 | error ("Junk at end of arguments."); | |
4923 | ||
4924 | /* Create a load breakpoint that only triggers when a load of | |
4925 | the specified dll (or any dll, if no pathname was specified) | |
4926 | occurs. */ | |
4927 | SOLIB_CREATE_CATCH_LOAD_HOOK (inferior_pid, tempflag, dll_pathname, cond_string); | |
4928 | } | |
4929 | ||
4930 | static void | |
4931 | catch_unload_command_1 (arg, tempflag, from_tty) | |
4932 | char * arg; | |
4933 | int tempflag; | |
4934 | int from_tty; | |
4935 | { | |
4936 | char * dll_pathname = NULL; | |
4937 | char * cond_string = NULL; | |
4938 | ||
4939 | ep_skip_leading_whitespace (&arg); | |
4940 | ||
4941 | /* The allowed syntax is: | |
4942 | catch unload | |
4943 | catch unload if <cond> | |
4944 | catch unload <filename> | |
4945 | catch unload <filename> if <cond> | |
4946 | ||
4947 | The user is not allowed to specify the <filename> after an | |
4948 | if clause. | |
4949 | ||
4950 | We'll ignore the pathological case of a file named "if". | |
4951 | ||
4952 | First, check if there's an if clause. If so, then there | |
4953 | cannot be a filename. */ | |
4954 | cond_string = ep_parse_optional_if_clause (&arg); | |
4955 | ||
4956 | /* If there was an if clause, then there cannot be a filename. | |
4957 | Else, there might be a filename and an if clause. */ | |
4958 | if (cond_string == NULL) | |
4959 | { | |
4960 | dll_pathname = ep_parse_optional_filename (&arg); | |
4961 | ep_skip_leading_whitespace (&arg); | |
4962 | cond_string = ep_parse_optional_if_clause (&arg); | |
4963 | } | |
4964 | ||
4965 | if ((*arg != '\0') && !isspace (*arg)) | |
4966 | error ("Junk at end of arguments."); | |
4967 | ||
4968 | /* Create an unload breakpoint that only triggers when an unload of | |
4969 | the specified dll (or any dll, if no pathname was specified) | |
4970 | occurs. */ | |
4971 | SOLIB_CREATE_CATCH_UNLOAD_HOOK (inferior_pid, tempflag, dll_pathname, cond_string); | |
4972 | } | |
4973 | #endif /* SOLIB_ADD */ | |
4974 | ||
4975 | /* Commands to deal with catching exceptions. */ | |
4976 | ||
4977 | /* Set a breakpoint at the specified callback routine for an | |
4978 | exception event callback */ | |
4979 | ||
4980 | static void | |
4981 | create_exception_catchpoint (tempflag, cond_string, ex_event, sal) | |
4982 | int tempflag; | |
4983 | char * cond_string; | |
4984 | enum exception_event_kind ex_event; | |
4985 | struct symtab_and_line * sal; | |
4986 | { | |
4987 | struct breakpoint * b; | |
4988 | int i; | |
4989 | int thread = -1; /* All threads. */ | |
4990 | ||
4991 | if (!sal) /* no exception support? */ | |
4992 | return; | |
4993 | ||
4994 | b = set_raw_breakpoint (*sal); | |
4995 | set_breakpoint_count (breakpoint_count + 1); | |
4996 | b->number = breakpoint_count; | |
4997 | b->cond = NULL; | |
4998 | b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string)); | |
4999 | b->thread = thread; | |
5000 | b->addr_string = NULL; | |
5001 | b->enable = enabled; | |
5002 | b->disposition = tempflag ? del : donttouch; | |
5003 | switch (ex_event) | |
5004 | { | |
5005 | case EX_EVENT_THROW: | |
5006 | b->type = bp_catch_throw; | |
5007 | break; | |
5008 | case EX_EVENT_CATCH: | |
5009 | b->type = bp_catch_catch; | |
5010 | break; | |
5011 | default: /* error condition */ | |
5012 | b->type = bp_none; | |
5013 | b->enable = disabled; | |
5014 | error ("Internal error -- invalid catchpoint kind"); | |
5015 | } | |
5016 | mention (b); | |
5017 | } | |
5018 | ||
5019 | /* Deal with "catch catch" and "catch throw" commands */ | |
5020 | ||
5021 | static void | |
5022 | catch_exception_command_1 (ex_event, arg, tempflag, from_tty) | |
5023 | enum exception_event_kind ex_event; | |
5024 | char * arg; | |
5025 | int tempflag; | |
5026 | int from_tty; | |
5027 | { | |
5028 | char * cond_string = NULL; | |
5029 | struct symtab_and_line * sal = NULL; | |
5030 | ||
5031 | ep_skip_leading_whitespace (&arg); | |
5032 | ||
5033 | cond_string = ep_parse_optional_if_clause (&arg); | |
5034 | ||
5035 | if ((*arg != '\0') && !isspace (*arg)) | |
5036 | error ("Junk at end of arguments."); | |
5037 | ||
5038 | if ((ex_event != EX_EVENT_THROW) && | |
5039 | (ex_event != EX_EVENT_CATCH)) | |
5040 | error ("Unsupported or unknown exception event; cannot catch it"); | |
5041 | ||
5042 | /* See if we can find a callback routine */ | |
5043 | sal = target_enable_exception_callback (ex_event, 1); | |
5044 | ||
5045 | if (sal) | |
5046 | { | |
5047 | /* We have callbacks from the runtime system for exceptions. | |
5048 | Set a breakpoint on the sal found, if no errors */ | |
5049 | if (sal != (struct symtab_and_line *) -1) | |
5050 | create_exception_catchpoint (tempflag, cond_string, ex_event, sal); | |
5051 | else | |
5052 | return; /* something went wrong with setting up callbacks */ | |
5053 | } | |
5054 | else | |
5055 | { | |
5056 | /* No callbacks from runtime system for exceptions. | |
5057 | Try GNU C++ exception breakpoints using labels in debug info. */ | |
5058 | if (ex_event == EX_EVENT_CATCH) | |
5059 | { | |
5060 | handle_gnu_4_16_catch_command (arg, tempflag, from_tty); | |
5061 | } | |
5062 | else if (ex_event == EX_EVENT_THROW) | |
5063 | { | |
5064 | /* Set a breakpoint on __raise_exception () */ | |
5065 | ||
5066 | fprintf_filtered (gdb_stderr, "Unsupported with this platform/compiler combination.\n"); | |
5067 | fprintf_filtered (gdb_stderr, "Perhaps you can achieve the effect you want by setting\n"); | |
5068 | fprintf_filtered (gdb_stderr, "a breakpoint on __raise_exception().\n"); | |
5069 | } | |
5070 | } | |
5071 | } | |
5072 | ||
5073 | /* Cover routine to allow wrapping target_enable_exception_catchpoints | |
5074 | inside a catch_errors */ | |
5075 | ||
5076 | static int | |
5077 | cover_target_enable_exception_callback (arg) | |
5078 | PTR arg; | |
5079 | { | |
5080 | args_for_catchpoint_enable *args = arg; | |
5081 | struct symtab_and_line *sal; | |
5082 | sal = target_enable_exception_callback (args->kind, args->enable); | |
5083 | if (sal == NULL) | |
5084 | return 0; | |
5085 | else if (sal == (struct symtab_and_line *) -1) | |
5086 | return -1; | |
5087 | else | |
5088 | return 1; /*is valid*/ | |
5089 | } | |
5090 | ||
5091 | ||
5092 | ||
5093 | /* This is the original v.4.16 and earlier version of the | |
5094 | catch_command_1() function. Now that other flavours of "catch" | |
5095 | have been introduced, and since exception handling can be handled | |
5096 | in other ways (through target ops) also, this is used only for the | |
5097 | GNU C++ exception handling system. | |
5098 | Note: Only the "catch" flavour of GDB 4.16 is handled here. The | |
5099 | "catch NAME" is now no longer allowed in catch_command_1(). Also, | |
5100 | there was no code in GDB 4.16 for "catch throw". | |
5101 | ||
5102 | Called from catch_exception_command_1 () */ | |
5103 | ||
5104 | ||
5105 | static void | |
5106 | handle_gnu_4_16_catch_command (arg, tempflag, from_tty) | |
5107 | char *arg; | |
5108 | int tempflag; | |
5109 | int from_tty; | |
5110 | { | |
5111 | /* First, translate ARG into something we can deal with in terms | |
5112 | of breakpoints. */ | |
5113 | ||
5114 | struct symtabs_and_lines sals; | |
5115 | struct symtab_and_line sal; | |
5116 | register struct expression *cond = 0; | |
5117 | register struct breakpoint *b; | |
5118 | char *save_arg; | |
5119 | int i; | |
5120 | ||
5121 | INIT_SAL (&sal); /* initialize to zeroes */ | |
5122 | ||
5123 | /* If no arg given, or if first arg is 'if ', all active catch clauses | |
5124 | are breakpointed. */ | |
5125 | ||
5126 | if (!arg || (arg[0] == 'i' && arg[1] == 'f' | |
5127 | && (arg[2] == ' ' || arg[2] == '\t'))) | |
5128 | { | |
5129 | /* Grab all active catch clauses. */ | |
5130 | sals = get_catch_sals (0); | |
5131 | } | |
5132 | else | |
5133 | { | |
5134 | /* Grab selected catch clauses. */ | |
5135 | error ("catch NAME not implemented"); | |
5136 | ||
5137 | #if 0 | |
5138 | /* Not sure why this code has been disabled. I'm leaving | |
5139 | it disabled. We can never come here now anyway | |
5140 | since we don't allow the "catch NAME" syntax. | |
5141 | pai/1997-07-11 */ | |
5142 | ||
5143 | /* This isn't used; I don't know what it was for. */ | |
5144 | sals = map_catch_names (arg, catch_breakpoint); | |
5145 | #endif | |
5146 | } | |
5147 | ||
5148 | if (! sals.nelts) | |
5149 | return; | |
5150 | ||
5151 | save_arg = arg; | |
5152 | for (i = 0; i < sals.nelts; i++) | |
5153 | { | |
5154 | resolve_sal_pc (&sals.sals[i]); | |
5155 | ||
5156 | while (arg && *arg) | |
5157 | { | |
5158 | if (arg[0] == 'i' && arg[1] == 'f' | |
5159 | && (arg[2] == ' ' || arg[2] == '\t')) | |
5160 | cond = parse_exp_1 ((arg += 2, &arg), | |
5161 | block_for_pc (sals.sals[i].pc), 0); | |
5162 | else | |
5163 | error ("Junk at end of arguments."); | |
5164 | } | |
5165 | arg = save_arg; | |
5166 | } | |
5167 | ||
5168 | for (i = 0; i < sals.nelts; i++) | |
5169 | { | |
5170 | sal = sals.sals[i]; | |
5171 | ||
5172 | if (from_tty) | |
5173 | describe_other_breakpoints (sal.pc, sal.section); | |
5174 | ||
5175 | b = set_raw_breakpoint (sal); | |
5176 | set_breakpoint_count (breakpoint_count + 1); | |
5177 | b->number = breakpoint_count; | |
5178 | b->type = bp_breakpoint; /* Important -- this is an ordinary breakpoint. | |
5179 | For platforms with callback support for exceptions, | |
5180 | create_exception_catchpoint() will create special | |
5181 | bp types (bp_catch_catch and bp_catch_throw), and | |
5182 | there is code in insert_breakpoints() and elsewhere | |
5183 | that depends on that. */ | |
5184 | ||
5185 | b->cond = cond; | |
5186 | b->enable = enabled; | |
5187 | b->disposition = tempflag ? del : donttouch; | |
5188 | ||
5189 | mention (b); | |
5190 | } | |
5191 | ||
5192 | if (sals.nelts > 1) | |
5193 | { | |
5194 | printf_unfiltered ("Multiple breakpoints were set.\n"); | |
5195 | printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); | |
5196 | } | |
5197 | free ((PTR)sals.sals); | |
5198 | } | |
5199 | ||
5200 | #if 0 | |
5201 | /* This creates a temporary internal breakpoint | |
5202 | just to placate infrun */ | |
5203 | static struct breakpoint * | |
5204 | create_temp_exception_breakpoint (pc) | |
5205 | CORE_ADDR pc; | |
5206 | { | |
5207 | struct symtab_and_line sal; | |
5208 | struct breakpoint *b; | |
5209 | ||
5210 | INIT_SAL(&sal); | |
5211 | sal.pc = pc; | |
5212 | sal.symtab = NULL; | |
5213 | sal.line = 0; | |
5214 | ||
5215 | b = set_raw_breakpoint (sal); | |
5216 | if (!b) | |
5217 | error ("Internal error -- couldn't set temp exception breakpoint"); | |
5218 | ||
5219 | b->type = bp_breakpoint; | |
5220 | b->disposition = del; | |
5221 | b->enable = enabled; | |
5222 | b->silent = 1; | |
5223 | b->number = internal_breakpoint_number--; | |
5224 | return b; | |
5225 | } | |
5226 | #endif | |
5227 | ||
5228 | static void | |
5229 | catch_command_1 (arg, tempflag, from_tty) | |
5230 | char *arg; | |
5231 | int tempflag; | |
5232 | int from_tty; | |
5233 | { | |
5234 | ||
5235 | /* The first argument may be an event name, such as "start" or "load". | |
5236 | If so, then handle it as such. If it doesn't match an event name, | |
5237 | then attempt to interpret it as an exception name. (This latter is | |
5238 | the v4.16-and-earlier GDB meaning of the "catch" command.) | |
5239 | ||
5240 | First, try to find the bounds of what might be an event name. */ | |
5241 | char * arg1_start = arg; | |
5242 | char * arg1_end; | |
5243 | int arg1_length; | |
5244 | ||
5245 | if (arg1_start == NULL) | |
5246 | { | |
5247 | /* Old behaviour was to use pre-v-4.16 syntax */ | |
5248 | /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */ | |
5249 | /* return; */ | |
5250 | /* Now, this is not allowed */ | |
5251 | error ("Catch requires an event name."); | |
5252 | ||
5253 | } | |
5254 | arg1_end = ep_find_event_name_end (arg1_start); | |
5255 | if (arg1_end == NULL) | |
5256 | error ("catch requires an event"); | |
5257 | arg1_length = arg1_end + 1 - arg1_start; | |
5258 | ||
5259 | /* Try to match what we found against known event names. */ | |
5260 | if (strncmp (arg1_start, "signal", arg1_length) == 0) | |
5261 | { | |
5262 | error ("Catch of signal not yet implemented"); | |
5263 | } | |
5264 | else if (strncmp (arg1_start, "catch", arg1_length) == 0) | |
5265 | { | |
5266 | catch_exception_command_1 (EX_EVENT_CATCH, arg1_end+1, tempflag, from_tty); | |
5267 | } | |
5268 | else if (strncmp (arg1_start, "throw", arg1_length) == 0) | |
5269 | { | |
5270 | catch_exception_command_1 (EX_EVENT_THROW, arg1_end+1, tempflag, from_tty); | |
5271 | } | |
5272 | else if (strncmp (arg1_start, "thread_start", arg1_length) == 0) | |
5273 | { | |
5274 | error ("Catch of thread_start not yet implemented"); | |
5275 | } | |
5276 | else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0) | |
5277 | { | |
5278 | error ("Catch of thread_exit not yet implemented"); | |
5279 | } | |
5280 | else if (strncmp (arg1_start, "thread_join", arg1_length) == 0) | |
5281 | { | |
5282 | error ("Catch of thread_join not yet implemented"); | |
5283 | } | |
5284 | else if (strncmp (arg1_start, "start", arg1_length) == 0) | |
5285 | { | |
5286 | error ("Catch of start not yet implemented"); | |
5287 | } | |
5288 | else if (strncmp (arg1_start, "exit", arg1_length) == 0) | |
5289 | { | |
5290 | error ("Catch of exit not yet implemented"); | |
5291 | } | |
5292 | else if (strncmp (arg1_start, "fork", arg1_length) == 0) | |
5293 | { | |
5294 | #if defined(CHILD_INSERT_FORK_CATCHPOINT) | |
5295 | catch_fork_command_1 (catch_fork, arg1_end+1, tempflag, from_tty); | |
5296 | #else | |
5297 | error ("Catch of fork not yet implemented"); | |
5298 | #endif | |
5299 | } | |
5300 | else if (strncmp (arg1_start, "vfork", arg1_length) == 0) | |
5301 | { | |
5302 | #if defined(CHILD_INSERT_VFORK_CATCHPOINT) | |
5303 | catch_fork_command_1 (catch_vfork, arg1_end+1, tempflag, from_tty); | |
5304 | #else | |
5305 | error ("Catch of vfork not yet implemented"); | |
5306 | #endif | |
5307 | } | |
5308 | else if (strncmp (arg1_start, "exec", arg1_length) == 0) | |
5309 | { | |
5310 | #if defined(CHILD_INSERT_EXEC_CATCHPOINT) | |
5311 | catch_exec_command_1 (arg1_end+1, tempflag, from_tty); | |
5312 | #else | |
5313 | error ("Catch of exec not yet implemented"); | |
5314 | #endif | |
5315 | } | |
5316 | else if (strncmp (arg1_start, "load", arg1_length) == 0) | |
5317 | { | |
5318 | #if defined(SOLIB_ADD) | |
5319 | catch_load_command_1 (arg1_end+1, tempflag, from_tty); | |
5320 | #else | |
5321 | error ("Catch of load not implemented"); | |
5322 | #endif | |
5323 | } | |
5324 | else if (strncmp (arg1_start, "unload", arg1_length) == 0) | |
5325 | { | |
5326 | #if defined(SOLIB_ADD) | |
5327 | catch_unload_command_1 (arg1_end+1, tempflag, from_tty); | |
5328 | #else | |
5329 | error ("Catch of load not implemented"); | |
5330 | #endif | |
5331 | } | |
5332 | else if (strncmp (arg1_start, "stop", arg1_length) == 0) | |
5333 | { | |
5334 | error ("Catch of stop not yet implemented"); | |
5335 | } | |
5336 | ||
5337 | /* This doesn't appear to be an event name */ | |
5338 | ||
5339 | else | |
5340 | { | |
5341 | /* Pre-v.4.16 behaviour was to treat the argument | |
5342 | as the name of an exception */ | |
5343 | /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */ | |
5344 | /* Now this is not allowed */ | |
5345 | error ("Unknown event kind specified for catch"); | |
5346 | ||
5347 | } | |
5348 | } | |
5349 | ||
5350 | /* Used by the gui, could be made a worker for other things. */ | |
5351 | ||
5352 | struct breakpoint * | |
5353 | set_breakpoint_sal (sal) | |
5354 | struct symtab_and_line sal; | |
5355 | { | |
5356 | struct breakpoint *b; | |
5357 | b = set_raw_breakpoint (sal); | |
5358 | set_breakpoint_count (breakpoint_count + 1); | |
5359 | b->number = breakpoint_count; | |
5360 | b->type = bp_breakpoint; | |
5361 | b->cond = 0; | |
5362 | b->thread = -1; | |
5363 | return b; | |
5364 | } | |
5365 | ||
5366 | #if 0 | |
5367 | /* These aren't used; I don't know what they were for. */ | |
5368 | /* Disable breakpoints on all catch clauses described in ARGS. */ | |
5369 | static void | |
5370 | disable_catch (args) | |
5371 | char *args; | |
5372 | { | |
5373 | /* Map the disable command to catch clauses described in ARGS. */ | |
5374 | } | |
5375 | ||
5376 | /* Enable breakpoints on all catch clauses described in ARGS. */ | |
5377 | static void | |
5378 | enable_catch (args) | |
5379 | char *args; | |
5380 | { | |
5381 | /* Map the disable command to catch clauses described in ARGS. */ | |
5382 | } | |
5383 | ||
5384 | /* Delete breakpoints on all catch clauses in the active scope. */ | |
5385 | static void | |
5386 | delete_catch (args) | |
5387 | char *args; | |
5388 | { | |
5389 | /* Map the delete command to catch clauses described in ARGS. */ | |
5390 | } | |
5391 | #endif /* 0 */ | |
5392 | ||
5393 | static void | |
5394 | catch_command (arg, from_tty) | |
5395 | char *arg; | |
5396 | int from_tty; | |
5397 | { | |
5398 | catch_command_1 (arg, 0, from_tty); | |
5399 | } | |
5400 | \f | |
5401 | ||
5402 | static void | |
5403 | tcatch_command (arg, from_tty) | |
5404 | char *arg; | |
5405 | int from_tty; | |
5406 | { | |
5407 | catch_command_1 (arg, 1, from_tty); | |
5408 | } | |
5409 | ||
5410 | ||
5411 | static void | |
5412 | clear_command (arg, from_tty) | |
5413 | char *arg; | |
5414 | int from_tty; | |
5415 | { | |
5416 | register struct breakpoint *b, *b1; | |
5417 | int default_match; | |
5418 | struct symtabs_and_lines sals; | |
5419 | struct symtab_and_line sal; | |
5420 | register struct breakpoint *found; | |
5421 | int i; | |
5422 | ||
5423 | if (arg) | |
5424 | { | |
5425 | sals = decode_line_spec (arg, 1); | |
5426 | default_match = 0; | |
5427 | } | |
5428 | else | |
5429 | { | |
5430 | sals.sals = (struct symtab_and_line *) | |
5431 | xmalloc (sizeof (struct symtab_and_line)); | |
5432 | INIT_SAL (&sal); /* initialize to zeroes */ | |
5433 | sal.line = default_breakpoint_line; | |
5434 | sal.symtab = default_breakpoint_symtab; | |
5435 | sal.pc = default_breakpoint_address; | |
5436 | if (sal.symtab == 0) | |
5437 | error ("No source file specified."); | |
5438 | ||
5439 | sals.sals[0] = sal; | |
5440 | sals.nelts = 1; | |
5441 | ||
5442 | default_match = 1; | |
5443 | } | |
5444 | ||
5445 | /* For each line spec given, delete bps which correspond | |
5446 | to it. We do this in two loops: the first loop looks at | |
5447 | the initial bp(s) in the chain which should be deleted, | |
5448 | the second goes down the rest of the chain looking ahead | |
5449 | one so it can take those bps off the chain without messing | |
5450 | up the chain. */ | |
5451 | ||
5452 | ||
5453 | for (i = 0; i < sals.nelts; i++) | |
5454 | { | |
5455 | /* If exact pc given, clear bpts at that pc. | |
5456 | If line given (pc == 0), clear all bpts on specified line. | |
5457 | If defaulting, clear all bpts on default line | |
5458 | or at default pc. | |
5459 | ||
5460 | defaulting sal.pc != 0 tests to do | |
5461 | ||
5462 | 0 1 pc | |
5463 | 1 1 pc _and_ line | |
5464 | 0 0 line | |
5465 | 1 0 <can't happen> */ | |
5466 | ||
5467 | sal = sals.sals[i]; | |
5468 | found = (struct breakpoint *) 0; | |
5469 | ||
5470 | ||
5471 | while (breakpoint_chain | |
5472 | /* Why don't we check here that this is not | |
5473 | a watchpoint, etc., as we do below? | |
5474 | I can't make it fail, but don't know | |
5475 | what's stopping the failure: a watchpoint | |
5476 | of the same address as "sal.pc" should | |
5477 | wind up being deleted. */ | |
5478 | ||
5479 | && ( ((sal.pc && (breakpoint_chain->address == sal.pc)) && | |
5480 | (overlay_debugging == 0 || | |
5481 | breakpoint_chain->section == sal.section)) | |
5482 | || ((default_match || (0 == sal.pc)) | |
5483 | && breakpoint_chain->source_file != NULL | |
5484 | && sal.symtab != NULL | |
5485 | && STREQ (breakpoint_chain->source_file, sal.symtab->filename) | |
5486 | && breakpoint_chain->line_number == sal.line))) | |
5487 | ||
5488 | { | |
5489 | b1 = breakpoint_chain; | |
5490 | breakpoint_chain = b1->next; | |
5491 | b1->next = found; | |
5492 | found = b1; | |
5493 | } | |
5494 | ||
5495 | ALL_BREAKPOINTS (b) | |
5496 | ||
5497 | while (b->next | |
5498 | && b->next->type != bp_none | |
5499 | && b->next->type != bp_watchpoint | |
5500 | && b->next->type != bp_hardware_watchpoint | |
5501 | && b->next->type != bp_read_watchpoint | |
5502 | && b->next->type != bp_access_watchpoint | |
5503 | && ( ((sal.pc && (b->next->address == sal.pc)) && | |
5504 | (overlay_debugging == 0 || | |
5505 | b->next->section == sal.section)) | |
5506 | || ((default_match || (0 == sal.pc)) | |
5507 | && b->next->source_file != NULL | |
5508 | && sal.symtab != NULL | |
5509 | && STREQ (b->next->source_file, sal.symtab->filename) | |
5510 | && b->next->line_number == sal.line))) | |
5511 | ||
5512 | ||
5513 | { | |
5514 | b1 = b->next; | |
5515 | b->next = b1->next; | |
5516 | b1->next = found; | |
5517 | found = b1; | |
5518 | } | |
5519 | ||
5520 | if (found == 0) | |
5521 | { | |
5522 | if (arg) | |
5523 | error ("No breakpoint at %s.", arg); | |
5524 | else | |
5525 | error ("No breakpoint at this line."); | |
5526 | } | |
5527 | ||
5528 | if (found->next) from_tty = 1; /* Always report if deleted more than one */ | |
5529 | if (from_tty) printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : ""); | |
5530 | breakpoints_changed (); | |
5531 | while (found) | |
5532 | { | |
5533 | if (from_tty) printf_unfiltered ("%d ", found->number); | |
5534 | b1 = found->next; | |
5535 | delete_breakpoint (found); | |
5536 | found = b1; | |
5537 | } | |
5538 | if (from_tty) putchar_unfiltered ('\n'); | |
5539 | } | |
5540 | free ((PTR)sals.sals); | |
5541 | } | |
5542 | \f | |
5543 | /* Delete breakpoint in BS if they are `delete' breakpoints and | |
5544 | all breakpoints that are marked for deletion, whether hit or not. | |
5545 | This is called after any breakpoint is hit, or after errors. */ | |
5546 | ||
5547 | void | |
5548 | breakpoint_auto_delete (bs) | |
5549 | bpstat bs; | |
5550 | { | |
5551 | struct breakpoint *b, *temp; | |
5552 | ||
5553 | for (; bs; bs = bs->next) | |
5554 | if (bs->breakpoint_at && bs->breakpoint_at->disposition == del | |
5555 | && bs->stop) | |
5556 | delete_breakpoint (bs->breakpoint_at); | |
5557 | ||
5558 | ALL_BREAKPOINTS_SAFE (b, temp) | |
5559 | { | |
5560 | if (b->disposition == del_at_next_stop) | |
5561 | delete_breakpoint (b); | |
5562 | } | |
5563 | } | |
5564 | ||
5565 | /* Delete a breakpoint and clean up all traces of it in the data structures. */ | |
5566 | ||
5567 | void | |
5568 | delete_breakpoint (bpt) | |
5569 | struct breakpoint *bpt; | |
5570 | { | |
5571 | register struct breakpoint *b; | |
5572 | register bpstat bs; | |
5573 | ||
5574 | if (bpt == NULL) | |
5575 | error ("Internal error (attempted to delete a NULL breakpoint)"); | |
5576 | ||
5577 | ||
5578 | /* Has this bp already been deleted? This can happen because multiple | |
5579 | lists can hold pointers to bp's. bpstat lists are especial culprits. | |
5580 | ||
5581 | One example of this happening is a watchpoint's scope bp. When the | |
5582 | scope bp triggers, we notice that the watchpoint is out of scope, and | |
5583 | delete it. We also delete its scope bp. But the scope bp is marked | |
5584 | "auto-deleting", and is already on a bpstat. That bpstat is then | |
5585 | checked for auto-deleting bp's, which are deleted. | |
5586 | ||
5587 | A real solution to this problem might involve reference counts in bp's, | |
5588 | and/or giving them pointers back to their referencing bpstat's, and | |
5589 | teaching delete_breakpoint to only free a bp's storage when no more | |
5590 | references were extent. A cheaper bandaid was chosen. */ | |
5591 | if (bpt->type == bp_none) | |
5592 | return; | |
5593 | ||
5594 | if (delete_breakpoint_hook) | |
5595 | delete_breakpoint_hook (bpt); | |
5596 | ||
5597 | if (bpt->inserted) | |
5598 | remove_breakpoint (bpt, mark_uninserted); | |
5599 | ||
5600 | if (breakpoint_chain == bpt) | |
5601 | breakpoint_chain = bpt->next; | |
5602 | ||
5603 | /* If we have callback-style exception catchpoints, don't go through | |
5604 | the adjustments to the C++ runtime library etc. if the inferior | |
5605 | isn't actually running. target_enable_exception_callback for a | |
5606 | null target ops vector gives an undesirable error message, so we | |
5607 | check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's | |
5608 | exceptions are supported in this way, it's OK for now. FIXME */ | |
5609 | if (ep_is_exception_catchpoint (bpt) && target_has_execution) | |
5610 | { | |
5611 | static char message1[] = "Error in deleting catchpoint %d:\n"; | |
5612 | static char message[sizeof (message1) + 30]; | |
5613 | args_for_catchpoint_enable args; | |
5614 | ||
5615 | sprintf (message, message1, bpt->number); /* Format possible error msg */ | |
5616 | args.kind = bpt->type == bp_catch_catch ? EX_EVENT_CATCH : EX_EVENT_THROW; | |
5617 | args.enable = 0; | |
5618 | catch_errors (cover_target_enable_exception_callback, &args, | |
5619 | message, RETURN_MASK_ALL); | |
5620 | } | |
5621 | ||
5622 | ||
5623 | ALL_BREAKPOINTS (b) | |
5624 | if (b->next == bpt) | |
5625 | { | |
5626 | b->next = bpt->next; | |
5627 | break; | |
5628 | } | |
5629 | ||
5630 | /* Before turning off the visuals for the bp, check to see that | |
5631 | there are no other bps at the same address. */ | |
5632 | if (tui_version) | |
5633 | { | |
5634 | int clearIt; | |
5635 | ||
5636 | ALL_BREAKPOINTS (b) | |
5637 | { | |
5638 | clearIt = (b->address != bpt->address); | |
5639 | if (!clearIt) | |
5640 | break; | |
5641 | } | |
5642 | ||
5643 | if (clearIt) | |
5644 | { | |
5645 | TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, bpt, 0)); | |
5646 | TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos)); | |
5647 | } | |
5648 | } | |
5649 | ||
5650 | check_duplicates (bpt->address, bpt->section); | |
5651 | /* If this breakpoint was inserted, and there is another breakpoint | |
5652 | at the same address, we need to insert the other breakpoint. */ | |
5653 | if (bpt->inserted | |
5654 | && bpt->type != bp_hardware_watchpoint | |
5655 | && bpt->type != bp_read_watchpoint | |
5656 | && bpt->type != bp_access_watchpoint | |
5657 | && bpt->type != bp_catch_fork | |
5658 | && bpt->type != bp_catch_vfork | |
5659 | && bpt->type != bp_catch_exec) | |
5660 | { | |
5661 | ALL_BREAKPOINTS (b) | |
5662 | if (b->address == bpt->address | |
5663 | && b->section == bpt->section | |
5664 | && !b->duplicate | |
5665 | && b->enable != disabled | |
5666 | && b->enable != shlib_disabled | |
5667 | && b->enable != call_disabled) | |
5668 | { | |
5669 | int val; | |
5670 | val = target_insert_breakpoint (b->address, b->shadow_contents); | |
5671 | if (val != 0) | |
5672 | { | |
5673 | target_terminal_ours_for_output (); | |
5674 | fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); | |
5675 | memory_error (val, b->address); /* which bombs us out */ | |
5676 | } | |
5677 | else | |
5678 | b->inserted = 1; | |
5679 | } | |
5680 | } | |
5681 | ||
5682 | free_command_lines (&bpt->commands); | |
5683 | if (bpt->cond) | |
5684 | free (bpt->cond); | |
5685 | if (bpt->cond_string != NULL) | |
5686 | free (bpt->cond_string); | |
5687 | if (bpt->addr_string != NULL) | |
5688 | free (bpt->addr_string); | |
5689 | if (bpt->exp != NULL) | |
5690 | free (bpt->exp); | |
5691 | if (bpt->exp_string != NULL) | |
5692 | free (bpt->exp_string); | |
5693 | if (bpt->val != NULL) | |
5694 | value_free (bpt->val); | |
5695 | if (bpt->source_file != NULL) | |
5696 | free (bpt->source_file); | |
5697 | if (bpt->dll_pathname != NULL) | |
5698 | free (bpt->dll_pathname); | |
5699 | if (bpt->triggered_dll_pathname != NULL) | |
5700 | free (bpt->triggered_dll_pathname); | |
5701 | if (bpt->exec_pathname != NULL) | |
5702 | free (bpt->exec_pathname); | |
5703 | ||
5704 | /* Be sure no bpstat's are pointing at it after it's been freed. */ | |
5705 | /* FIXME, how can we find all bpstat's? | |
5706 | We just check stop_bpstat for now. */ | |
5707 | for (bs = stop_bpstat; bs; bs = bs->next) | |
5708 | if (bs->breakpoint_at == bpt) | |
5709 | { | |
5710 | bs->breakpoint_at = NULL; | |
5711 | ||
5712 | /* we'd call bpstat_clear_actions, but that free's stuff and due | |
5713 | to the multiple pointers pointing to one item with no | |
5714 | reference counts found anywhere through out the bpstat's (how | |
5715 | do you spell fragile?), we don't want to free things twice -- | |
5716 | better a memory leak than a corrupt malloc pool! */ | |
5717 | bs->commands = NULL; | |
5718 | bs->old_val = NULL; | |
5719 | } | |
5720 | /* On the chance that someone will soon try again to delete this same | |
5721 | bp, we mark it as deleted before freeing its storage. */ | |
5722 | bpt->type = bp_none; | |
5723 | ||
5724 | free ((PTR)bpt); | |
5725 | } | |
5726 | ||
5727 | void | |
5728 | delete_command (arg, from_tty) | |
5729 | char *arg; | |
5730 | int from_tty; | |
5731 | { | |
5732 | struct breakpoint *b, *temp; | |
5733 | ||
5734 | if (arg == 0) | |
5735 | { | |
5736 | int breaks_to_delete = 0; | |
5737 | ||
5738 | /* Delete all breakpoints if no argument. | |
5739 | Do not delete internal or call-dummy breakpoints, these | |
5740 | have to be deleted with an explicit breakpoint number argument. */ | |
5741 | ALL_BREAKPOINTS (b) | |
5742 | { | |
5743 | if (b->type != bp_call_dummy && | |
5744 | b->type != bp_shlib_event && | |
5745 | b->number >= 0) | |
5746 | breaks_to_delete = 1; | |
5747 | } | |
5748 | ||
5749 | /* Ask user only if there are some breakpoints to delete. */ | |
5750 | if (!from_tty | |
5751 | || (breaks_to_delete && query ("Delete all breakpoints? "))) | |
5752 | { | |
5753 | ALL_BREAKPOINTS_SAFE (b, temp) | |
5754 | { | |
5755 | if (b->type != bp_call_dummy && | |
5756 | b->type != bp_shlib_event && | |
5757 | b->number >= 0) | |
5758 | delete_breakpoint (b); | |
5759 | } | |
5760 | } | |
5761 | } | |
5762 | else | |
5763 | map_breakpoint_numbers (arg, delete_breakpoint); | |
5764 | } | |
5765 | ||
5766 | /* Reset a breakpoint given it's struct breakpoint * BINT. | |
5767 | The value we return ends up being the return value from catch_errors. | |
5768 | Unused in this case. */ | |
5769 | ||
5770 | static int | |
5771 | breakpoint_re_set_one (bint) | |
5772 | PTR bint; | |
5773 | { | |
5774 | struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ | |
5775 | struct value *mark; | |
5776 | int i; | |
5777 | struct symtabs_and_lines sals; | |
5778 | char *s; | |
5779 | enum enable save_enable; | |
5780 | ||
5781 | switch (b->type) | |
5782 | { | |
5783 | case bp_none: | |
5784 | warning ("attempted to reset apparently deleted breakpoint #%d?\n", b->number); | |
5785 | return 0; | |
5786 | case bp_breakpoint: | |
5787 | case bp_hardware_breakpoint: | |
5788 | case bp_catch_load: | |
5789 | case bp_catch_unload: | |
5790 | if (b->addr_string == NULL) | |
5791 | { | |
5792 | /* Anything without a string can't be re-set. */ | |
5793 | delete_breakpoint (b); | |
5794 | return 0; | |
5795 | } | |
5796 | /* In case we have a problem, disable this breakpoint. We'll restore | |
5797 | its status if we succeed. */ | |
5798 | save_enable = b->enable; | |
5799 | b->enable = disabled; | |
5800 | ||
5801 | set_language (b->language); | |
5802 | input_radix = b->input_radix; | |
5803 | s = b->addr_string; | |
5804 | sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0, (char ***)NULL); | |
5805 | for (i = 0; i < sals.nelts; i++) | |
5806 | { | |
5807 | resolve_sal_pc (&sals.sals[i]); | |
5808 | ||
5809 | /* Reparse conditions, they might contain references to the | |
5810 | old symtab. */ | |
5811 | if (b->cond_string != NULL) | |
5812 | { | |
5813 | s = b->cond_string; | |
5814 | if (b->cond) | |
5815 | free ((PTR)b->cond); | |
5816 | b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); | |
5817 | } | |
5818 | ||
5819 | /* We need to re-set the breakpoint if the address changes...*/ | |
5820 | if (b->address != sals.sals[i].pc | |
5821 | /* ...or new and old breakpoints both have source files, and | |
5822 | the source file name or the line number changes... */ | |
5823 | || (b->source_file != NULL | |
5824 | && sals.sals[i].symtab != NULL | |
5825 | && (!STREQ (b->source_file, sals.sals[i].symtab->filename) | |
5826 | || b->line_number != sals.sals[i].line) | |
5827 | ) | |
5828 | /* ...or we switch between having a source file and not having | |
5829 | one. */ | |
5830 | || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL)) | |
5831 | ) | |
5832 | { | |
5833 | if (b->source_file != NULL) | |
5834 | free (b->source_file); | |
5835 | if (sals.sals[i].symtab == NULL) | |
5836 | b->source_file = NULL; | |
5837 | else | |
5838 | b->source_file = | |
5839 | savestring (sals.sals[i].symtab->filename, | |
5840 | strlen (sals.sals[i].symtab->filename)); | |
5841 | b->line_number = sals.sals[i].line; | |
5842 | b->address = sals.sals[i].pc; | |
5843 | ||
5844 | /* Used to check for duplicates here, but that can | |
5845 | cause trouble, as it doesn't check for disable | |
5846 | breakpoints. */ | |
5847 | ||
5848 | mention (b); | |
5849 | ||
5850 | /* Might be better to do this just once per breakpoint_re_set, | |
5851 | rather than once for every breakpoint. */ | |
5852 | breakpoints_changed (); | |
5853 | } | |
5854 | b->section = sals.sals[i].section; | |
5855 | b->enable = save_enable; /* Restore it, this worked. */ | |
5856 | ||
5857 | ||
5858 | /* Now that this is re-enabled, check_duplicates | |
5859 | can be used. */ | |
5860 | check_duplicates (b->address, b->section); | |
5861 | ||
5862 | } | |
5863 | free ((PTR)sals.sals); | |
5864 | break; | |
5865 | ||
5866 | case bp_watchpoint: | |
5867 | case bp_hardware_watchpoint: | |
5868 | case bp_read_watchpoint: | |
5869 | case bp_access_watchpoint: | |
5870 | innermost_block = NULL; | |
5871 | /* The issue arises of what context to evaluate this in. The same | |
5872 | one as when it was set, but what does that mean when symbols have | |
5873 | been re-read? We could save the filename and functionname, but | |
5874 | if the context is more local than that, the best we could do would | |
5875 | be something like how many levels deep and which index at that | |
5876 | particular level, but that's going to be less stable than filenames | |
5877 | or functionnames. */ | |
5878 | /* So for now, just use a global context. */ | |
5879 | if (b->exp) | |
5880 | free ((PTR)b->exp); | |
5881 | b->exp = parse_expression (b->exp_string); | |
5882 | b->exp_valid_block = innermost_block; | |
5883 | mark = value_mark (); | |
5884 | if (b->val) | |
5885 | value_free (b->val); | |
5886 | b->val = evaluate_expression (b->exp); | |
5887 | release_value (b->val); | |
5888 | if (VALUE_LAZY (b->val)) | |
5889 | value_fetch_lazy (b->val); | |
5890 | ||
5891 | if (b->cond_string != NULL) | |
5892 | { | |
5893 | s = b->cond_string; | |
5894 | if (b->cond) | |
5895 | free ((PTR)b->cond); | |
5896 | b->cond = parse_exp_1 (&s, (struct block *)0, 0); | |
5897 | } | |
5898 | if (b->enable == enabled) | |
5899 | mention (b); | |
5900 | value_free_to_mark (mark); | |
5901 | break; | |
5902 | case bp_catch_catch: | |
5903 | case bp_catch_throw: | |
5904 | break; | |
5905 | /* We needn't really do anything to reset these, since the mask | |
5906 | that requests them is unaffected by e.g., new libraries being | |
5907 | loaded. */ | |
5908 | case bp_catch_fork: | |
5909 | case bp_catch_vfork: | |
5910 | case bp_catch_exec: | |
5911 | break; | |
5912 | ||
5913 | default: | |
5914 | printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); | |
5915 | /* fall through */ | |
5916 | /* Delete longjmp breakpoints, they will be reset later by | |
5917 | breakpoint_re_set. */ | |
5918 | case bp_longjmp: | |
5919 | case bp_longjmp_resume: | |
5920 | delete_breakpoint (b); | |
5921 | break; | |
5922 | ||
5923 | /* This breakpoint is special, it's set up when the inferior | |
5924 | starts and we really don't want to touch it. */ | |
5925 | case bp_shlib_event: | |
5926 | ||
5927 | /* Keep temporary breakpoints, which can be encountered when we step | |
5928 | over a dlopen call and SOLIB_ADD is resetting the breakpoints. | |
5929 | Otherwise these should have been blown away via the cleanup chain | |
5930 | or by breakpoint_init_inferior when we rerun the executable. */ | |
5931 | case bp_until: | |
5932 | case bp_finish: | |
5933 | case bp_watchpoint_scope: | |
5934 | case bp_call_dummy: | |
5935 | case bp_step_resume: | |
5936 | break; | |
5937 | } | |
5938 | ||
5939 | return 0; | |
5940 | } | |
5941 | ||
5942 | /* Re-set all breakpoints after symbols have been re-loaded. */ | |
5943 | void | |
5944 | breakpoint_re_set () | |
5945 | { | |
5946 | struct breakpoint *b, *temp; | |
5947 | enum language save_language; | |
5948 | int save_input_radix; | |
5949 | static char message1[] = "Error in re-setting breakpoint %d:\n"; | |
5950 | char message[sizeof (message1) + 30 /* slop */]; | |
5951 | ||
5952 | save_language = current_language->la_language; | |
5953 | save_input_radix = input_radix; | |
5954 | ALL_BREAKPOINTS_SAFE (b, temp) | |
5955 | { | |
5956 | sprintf (message, message1, b->number); /* Format possible error msg */ | |
5957 | catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL); | |
5958 | } | |
5959 | set_language (save_language); | |
5960 | input_radix = save_input_radix; | |
5961 | ||
5962 | #ifdef GET_LONGJMP_TARGET | |
5963 | create_longjmp_breakpoint ("longjmp"); | |
5964 | create_longjmp_breakpoint ("_longjmp"); | |
5965 | create_longjmp_breakpoint ("siglongjmp"); | |
5966 | create_longjmp_breakpoint ("_siglongjmp"); | |
5967 | create_longjmp_breakpoint (NULL); | |
5968 | #endif | |
5969 | ||
5970 | #if 0 | |
5971 | /* Took this out (temporarily at least), since it produces an extra | |
5972 | blank line at startup. This messes up the gdbtests. -PB */ | |
5973 | /* Blank line to finish off all those mention() messages we just printed. */ | |
5974 | printf_filtered ("\n"); | |
5975 | #endif | |
5976 | } | |
5977 | \f | |
5978 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |
5979 | If from_tty is nonzero, it prints a message to that effect, | |
5980 | which ends with a period (no newline). */ | |
5981 | ||
5982 | /* Reset the thread number of this breakpoint: | |
5983 | ||
5984 | - If the breakpoint is for all threads, leave it as-is. | |
5985 | - Else, reset it to the current thread for inferior_pid. */ | |
5986 | void | |
5987 | breakpoint_re_set_thread (b) | |
5988 | struct breakpoint * b; | |
5989 | { | |
5990 | if (b->thread != -1) | |
5991 | { | |
5992 | if (in_thread_list (inferior_pid)) | |
5993 | b->thread = pid_to_thread_id (inferior_pid); | |
5994 | } | |
5995 | } | |
5996 | ||
5997 | void | |
5998 | set_ignore_count (bptnum, count, from_tty) | |
5999 | int bptnum, count, from_tty; | |
6000 | { | |
6001 | register struct breakpoint *b; | |
6002 | ||
6003 | if (count < 0) | |
6004 | count = 0; | |
6005 | ||
6006 | ALL_BREAKPOINTS (b) | |
6007 | if (b->number == bptnum) | |
6008 | { | |
6009 | b->ignore_count = count; | |
6010 | if (!from_tty) | |
6011 | return; | |
6012 | else if (count == 0) | |
6013 | printf_filtered ("Will stop next time breakpoint %d is reached.", | |
6014 | bptnum); | |
6015 | else if (count == 1) | |
6016 | printf_filtered ("Will ignore next crossing of breakpoint %d.", | |
6017 | bptnum); | |
6018 | else | |
6019 | printf_filtered ("Will ignore next %d crossings of breakpoint %d.", | |
6020 | count, bptnum); | |
6021 | breakpoints_changed (); | |
6022 | return; | |
6023 | } | |
6024 | ||
6025 | error ("No breakpoint number %d.", bptnum); | |
6026 | } | |
6027 | ||
6028 | /* Clear the ignore counts of all breakpoints. */ | |
6029 | void | |
6030 | breakpoint_clear_ignore_counts () | |
6031 | { | |
6032 | struct breakpoint *b; | |
6033 | ||
6034 | ALL_BREAKPOINTS (b) | |
6035 | b->ignore_count = 0; | |
6036 | } | |
6037 | ||
6038 | /* Command to set ignore-count of breakpoint N to COUNT. */ | |
6039 | ||
6040 | static void | |
6041 | ignore_command (args, from_tty) | |
6042 | char *args; | |
6043 | int from_tty; | |
6044 | { | |
6045 | char *p = args; | |
6046 | register int num; | |
6047 | ||
6048 | if (p == 0) | |
6049 | error_no_arg ("a breakpoint number"); | |
6050 | ||
6051 | num = get_number (&p); | |
6052 | ||
6053 | if (*p == 0) | |
6054 | error ("Second argument (specified ignore-count) is missing."); | |
6055 | ||
6056 | set_ignore_count (num, | |
6057 | longest_to_int (value_as_long (parse_and_eval (p))), | |
6058 | from_tty); | |
6059 | printf_filtered ("\n"); | |
6060 | breakpoints_changed (); | |
6061 | } | |
6062 | \f | |
6063 | /* Call FUNCTION on each of the breakpoints | |
6064 | whose numbers are given in ARGS. */ | |
6065 | ||
6066 | static void | |
6067 | map_breakpoint_numbers (args, function) | |
6068 | char *args; | |
6069 | void (*function) PARAMS ((struct breakpoint *)); | |
6070 | { | |
6071 | register char *p = args; | |
6072 | char *p1; | |
6073 | register int num; | |
6074 | register struct breakpoint *b; | |
6075 | ||
6076 | if (p == 0) | |
6077 | error_no_arg ("one or more breakpoint numbers"); | |
6078 | ||
6079 | while (*p) | |
6080 | { | |
6081 | p1 = p; | |
6082 | ||
6083 | num = get_number (&p1); | |
6084 | ||
6085 | ALL_BREAKPOINTS (b) | |
6086 | if (b->number == num) | |
6087 | { | |
6088 | struct breakpoint *related_breakpoint = b->related_breakpoint; | |
6089 | function (b); | |
6090 | if (related_breakpoint) | |
6091 | function (related_breakpoint); | |
6092 | goto win; | |
6093 | } | |
6094 | printf_unfiltered ("No breakpoint number %d.\n", num); | |
6095 | win: | |
6096 | p = p1; | |
6097 | } | |
6098 | } | |
6099 | ||
6100 | void | |
6101 | disable_breakpoint (bpt) | |
6102 | struct breakpoint *bpt; | |
6103 | { | |
6104 | /* Never disable a watchpoint scope breakpoint; we want to | |
6105 | hit them when we leave scope so we can delete both the | |
6106 | watchpoint and its scope breakpoint at that time. */ | |
6107 | if (bpt->type == bp_watchpoint_scope) | |
6108 | return; | |
6109 | ||
6110 | bpt->enable = disabled; | |
6111 | ||
6112 | check_duplicates (bpt->address, bpt->section); | |
6113 | ||
6114 | if (modify_breakpoint_hook) | |
6115 | modify_breakpoint_hook (bpt); | |
6116 | } | |
6117 | ||
6118 | /* ARGSUSED */ | |
6119 | static void | |
6120 | disable_command (args, from_tty) | |
6121 | char *args; | |
6122 | int from_tty; | |
6123 | { | |
6124 | register struct breakpoint *bpt; | |
6125 | if (args == 0) | |
6126 | ALL_BREAKPOINTS (bpt) | |
6127 | switch (bpt->type) | |
6128 | { | |
6129 | case bp_none: | |
6130 | warning ("attempted to disable apparently deleted breakpoint #%d?\n", bpt->number); | |
6131 | continue; | |
6132 | case bp_breakpoint: | |
6133 | case bp_catch_load: | |
6134 | case bp_catch_unload: | |
6135 | case bp_catch_fork: | |
6136 | case bp_catch_vfork: | |
6137 | case bp_catch_exec: | |
6138 | case bp_catch_catch: | |
6139 | case bp_catch_throw: | |
6140 | case bp_hardware_breakpoint: | |
6141 | case bp_watchpoint: | |
6142 | case bp_hardware_watchpoint: | |
6143 | case bp_read_watchpoint: | |
6144 | case bp_access_watchpoint: | |
6145 | disable_breakpoint (bpt); | |
6146 | default: | |
6147 | continue; | |
6148 | } | |
6149 | else | |
6150 | map_breakpoint_numbers (args, disable_breakpoint); | |
6151 | } | |
6152 | ||
6153 | static void | |
6154 | do_enable_breakpoint (bpt, disposition) | |
6155 | struct breakpoint *bpt; | |
6156 | enum bpdisp disposition; | |
6157 | { | |
6158 | struct frame_info *save_selected_frame = NULL; | |
6159 | int save_selected_frame_level = -1; | |
6160 | int target_resources_ok, other_type_used; | |
6161 | struct value *mark; | |
6162 | ||
6163 | if (bpt->type == bp_hardware_breakpoint) | |
6164 | { | |
6165 | int i; | |
6166 | i = hw_breakpoint_used_count(); | |
6167 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT( | |
6168 | bp_hardware_breakpoint, i+1, 0); | |
6169 | if (target_resources_ok == 0) | |
6170 | error ("No hardware breakpoint support in the target."); | |
6171 | else if (target_resources_ok < 0) | |
6172 | error ("Hardware breakpoints used exceeds limit."); | |
6173 | } | |
6174 | ||
6175 | bpt->enable = enabled; | |
6176 | bpt->disposition = disposition; | |
6177 | check_duplicates (bpt->address, bpt->section); | |
6178 | breakpoints_changed (); | |
6179 | ||
6180 | if (bpt->type == bp_watchpoint || bpt->type == bp_hardware_watchpoint || | |
6181 | bpt->type == bp_read_watchpoint || bpt->type == bp_access_watchpoint) | |
6182 | { | |
6183 | if (bpt->exp_valid_block != NULL) | |
6184 | { | |
6185 | struct frame_info *fr = | |
6186 | ||
6187 | /* Ensure that we have the current frame. Else, this | |
6188 | next query may pessimistically be answered as, "No, | |
6189 | not within current scope". */ | |
6190 | get_current_frame (); | |
6191 | fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame); | |
6192 | if (fr == NULL) | |
6193 | { | |
6194 | printf_filtered ("\ | |
6195 | Cannot enable watchpoint %d because the block in which its expression\n\ | |
6196 | is valid is not currently in scope.\n", bpt->number); | |
6197 | bpt->enable = disabled; | |
6198 | return; | |
6199 | } | |
6200 | ||
6201 | save_selected_frame = selected_frame; | |
6202 | save_selected_frame_level = selected_frame_level; | |
6203 | select_frame (fr, -1); | |
6204 | } | |
6205 | ||
6206 | value_free (bpt->val); | |
6207 | mark = value_mark (); | |
6208 | bpt->val = evaluate_expression (bpt->exp); | |
6209 | release_value (bpt->val); | |
6210 | if (VALUE_LAZY (bpt->val)) | |
6211 | value_fetch_lazy (bpt->val); | |
6212 | ||
6213 | if (bpt->type == bp_hardware_watchpoint || | |
6214 | bpt->type == bp_read_watchpoint || | |
6215 | bpt->type == bp_access_watchpoint) | |
6216 | { | |
6217 | int i = hw_watchpoint_used_count (bpt->type, &other_type_used); | |
6218 | int mem_cnt = can_use_hardware_watchpoint (bpt->val); | |
6219 | ||
6220 | /* Hack around 'unused var' error for some targets here */ | |
6221 | (void) mem_cnt, i; | |
6222 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT( | |
6223 | bpt->type, i + mem_cnt, other_type_used); | |
6224 | /* we can consider of type is bp_hardware_watchpoint, convert to | |
6225 | bp_watchpoint in the following condition */ | |
6226 | if (target_resources_ok < 0) | |
6227 | { | |
6228 | printf_filtered("\ | |
6229 | Cannot enable watchpoint %d because target watch resources\n\ | |
6230 | have been allocated for other watchpoints.\n", bpt->number); | |
6231 | bpt->enable = disabled; | |
6232 | value_free_to_mark (mark); | |
6233 | return; | |
6234 | } | |
6235 | } | |
6236 | ||
6237 | if (save_selected_frame_level >= 0) | |
6238 | select_and_print_frame (save_selected_frame, save_selected_frame_level); | |
6239 | value_free_to_mark (mark); | |
6240 | } | |
6241 | if (modify_breakpoint_hook) | |
6242 | modify_breakpoint_hook (bpt); | |
6243 | } | |
6244 | ||
6245 | void | |
6246 | enable_breakpoint (bpt) | |
6247 | struct breakpoint *bpt; | |
6248 | { | |
6249 | do_enable_breakpoint (bpt, bpt->disposition); | |
6250 | } | |
6251 | ||
6252 | /* The enable command enables the specified breakpoints (or all defined | |
6253 | breakpoints) so they once again become (or continue to be) effective | |
6254 | in stopping the inferior. */ | |
6255 | ||
6256 | /* ARGSUSED */ | |
6257 | static void | |
6258 | enable_command (args, from_tty) | |
6259 | char *args; | |
6260 | int from_tty; | |
6261 | { | |
6262 | register struct breakpoint *bpt; | |
6263 | if (args == 0) | |
6264 | ALL_BREAKPOINTS (bpt) | |
6265 | switch (bpt->type) | |
6266 | { | |
6267 | case bp_none: | |
6268 | warning ("attempted to enable apparently deleted breakpoint #%d?\n", bpt->number); | |
6269 | continue; | |
6270 | case bp_breakpoint: | |
6271 | case bp_catch_load: | |
6272 | case bp_catch_unload: | |
6273 | case bp_catch_fork: | |
6274 | case bp_catch_vfork: | |
6275 | case bp_catch_exec: | |
6276 | case bp_catch_catch: | |
6277 | case bp_catch_throw: | |
6278 | case bp_hardware_breakpoint: | |
6279 | case bp_watchpoint: | |
6280 | case bp_hardware_watchpoint: | |
6281 | case bp_read_watchpoint: | |
6282 | case bp_access_watchpoint: | |
6283 | enable_breakpoint (bpt); | |
6284 | default: | |
6285 | continue; | |
6286 | } | |
6287 | else | |
6288 | map_breakpoint_numbers (args, enable_breakpoint); | |
6289 | } | |
6290 | ||
6291 | static void | |
6292 | enable_once_breakpoint (bpt) | |
6293 | struct breakpoint *bpt; | |
6294 | { | |
6295 | do_enable_breakpoint (bpt, disable); | |
6296 | } | |
6297 | ||
6298 | /* ARGSUSED */ | |
6299 | static void | |
6300 | enable_once_command (args, from_tty) | |
6301 | char *args; | |
6302 | int from_tty; | |
6303 | { | |
6304 | map_breakpoint_numbers (args, enable_once_breakpoint); | |
6305 | } | |
6306 | ||
6307 | static void | |
6308 | enable_delete_breakpoint (bpt) | |
6309 | struct breakpoint *bpt; | |
6310 | { | |
6311 | do_enable_breakpoint (bpt, del); | |
6312 | } | |
6313 | ||
6314 | /* ARGSUSED */ | |
6315 | static void | |
6316 | enable_delete_command (args, from_tty) | |
6317 | char *args; | |
6318 | int from_tty; | |
6319 | { | |
6320 | map_breakpoint_numbers (args, enable_delete_breakpoint); | |
6321 | } | |
6322 | \f | |
6323 | /* Use default_breakpoint_'s, or nothing if they aren't valid. */ | |
6324 | ||
6325 | struct symtabs_and_lines | |
6326 | decode_line_spec_1 (string, funfirstline) | |
6327 | char *string; | |
6328 | int funfirstline; | |
6329 | { | |
6330 | struct symtabs_and_lines sals; | |
6331 | if (string == 0) | |
6332 | error ("Empty line specification."); | |
6333 | if (default_breakpoint_valid) | |
6334 | sals = decode_line_1 (&string, funfirstline, | |
6335 | default_breakpoint_symtab, default_breakpoint_line, | |
6336 | (char ***)NULL); | |
6337 | else | |
6338 | sals = decode_line_1 (&string, funfirstline, | |
6339 | (struct symtab *)NULL, 0, (char ***)NULL); | |
6340 | if (*string) | |
6341 | error ("Junk at end of line specification: %s", string); | |
6342 | return sals; | |
6343 | } | |
6344 | \f | |
6345 | void | |
6346 | _initialize_breakpoint () | |
6347 | { | |
6348 | struct cmd_list_element *c; | |
6349 | ||
6350 | breakpoint_chain = 0; | |
6351 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful | |
6352 | before a breakpoint is set. */ | |
6353 | breakpoint_count = 0; | |
6354 | ||
6355 | add_com ("ignore", class_breakpoint, ignore_command, | |
6356 | "Set ignore-count of breakpoint number N to COUNT.\n\ | |
6357 | Usage is `ignore N COUNT'."); | |
6358 | if (xdb_commands) | |
6359 | add_com_alias("bc", "ignore", class_breakpoint, 1); | |
6360 | ||
6361 | add_com ("commands", class_breakpoint, commands_command, | |
6362 | "Set commands to be executed when a breakpoint is hit.\n\ | |
6363 | Give breakpoint number as argument after \"commands\".\n\ | |
6364 | With no argument, the targeted breakpoint is the last one set.\n\ | |
6365 | The commands themselves follow starting on the next line.\n\ | |
6366 | Type a line containing \"end\" to indicate the end of them.\n\ | |
6367 | Give \"silent\" as the first line to make the breakpoint silent;\n\ | |
6368 | then no output is printed when it is hit, except what the commands print."); | |
6369 | ||
6370 | add_com ("condition", class_breakpoint, condition_command, | |
6371 | "Specify breakpoint number N to break only if COND is true.\n\ | |
6372 | Usage is `condition N COND', where N is an integer and COND is an\n\ | |
6373 | expression to be evaluated whenever breakpoint N is reached. "); | |
6374 | ||
6375 | add_com ("tbreak", class_breakpoint, tbreak_command, | |
6376 | "Set a temporary breakpoint. Args like \"break\" command.\n\ | |
6377 | Like \"break\" except the breakpoint is only temporary,\n\ | |
6378 | so it will be deleted when hit. Equivalent to \"break\" followed\n\ | |
6379 | by using \"enable delete\" on the breakpoint number."); | |
6380 | add_com("txbreak", class_breakpoint, tbreak_at_finish_command, | |
6381 | "Set temporary breakpoint at procedure exit. Either there should\n\ | |
6382 | be no argument or the argument must be a depth.\n"); | |
6383 | ||
6384 | add_com ("hbreak", class_breakpoint, hbreak_command, | |
6385 | "Set a hardware assisted breakpoint. Args like \"break\" command.\n\ | |
6386 | Like \"break\" except the breakpoint requires hardware support,\n\ | |
6387 | some target hardware may not have this support."); | |
6388 | ||
6389 | add_com ("thbreak", class_breakpoint, thbreak_command, | |
6390 | "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\ | |
6391 | Like \"hbreak\" except the breakpoint is only temporary,\n\ | |
6392 | so it will be deleted when hit."); | |
6393 | ||
6394 | add_prefix_cmd ("enable", class_breakpoint, enable_command, | |
6395 | "Enable some breakpoints.\n\ | |
6396 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
6397 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
6398 | This is used to cancel the effect of the \"disable\" command.\n\ | |
6399 | With a subcommand you can enable temporarily.", | |
6400 | &enablelist, "enable ", 1, &cmdlist); | |
6401 | if (xdb_commands) | |
6402 | add_com("ab", class_breakpoint, enable_command, | |
6403 | "Enable some breakpoints.\n\ | |
6404 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
6405 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |
6406 | This is used to cancel the effect of the \"disable\" command.\n\ | |
6407 | With a subcommand you can enable temporarily."); | |
6408 | ||
6409 | add_com_alias ("en", "enable", class_breakpoint, 1); | |
6410 | ||
6411 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, | |
6412 | "Enable some breakpoints.\n\ | |
6413 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |
6414 | This is used to cancel the effect of the \"disable\" command.\n\ | |
6415 | May be abbreviated to simply \"enable\".\n", | |
6416 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); | |
6417 | ||
6418 | add_cmd ("once", no_class, enable_once_command, | |
6419 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
6420 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.", | |
6421 | &enablebreaklist); | |
6422 | ||
6423 | add_cmd ("delete", no_class, enable_delete_command, | |
6424 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
6425 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
6426 | &enablebreaklist); | |
6427 | ||
6428 | add_cmd ("delete", no_class, enable_delete_command, | |
6429 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |
6430 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |
6431 | &enablelist); | |
6432 | ||
6433 | add_cmd ("once", no_class, enable_once_command, | |
6434 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |
6435 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.", | |
6436 | &enablelist); | |
6437 | ||
6438 | add_prefix_cmd ("disable", class_breakpoint, disable_command, | |
6439 | "Disable some breakpoints.\n\ | |
6440 | Arguments are breakpoint numbers with spaces in between.\n\ | |
6441 | To disable all breakpoints, give no argument.\n\ | |
6442 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", | |
6443 | &disablelist, "disable ", 1, &cmdlist); | |
6444 | add_com_alias ("dis", "disable", class_breakpoint, 1); | |
6445 | add_com_alias ("disa", "disable", class_breakpoint, 1); | |
6446 | if (xdb_commands) | |
6447 | add_com("sb", class_breakpoint, disable_command, | |
6448 | "Disable some breakpoints.\n\ | |
6449 | Arguments are breakpoint numbers with spaces in between.\n\ | |
6450 | To disable all breakpoints, give no argument.\n\ | |
6451 | A disabled breakpoint is not forgotten, but has no effect until reenabled."); | |
6452 | ||
6453 | add_cmd ("breakpoints", class_alias, disable_command, | |
6454 | "Disable some breakpoints.\n\ | |
6455 | Arguments are breakpoint numbers with spaces in between.\n\ | |
6456 | To disable all breakpoints, give no argument.\n\ | |
6457 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |
6458 | This command may be abbreviated \"disable\".", | |
6459 | &disablelist); | |
6460 | ||
6461 | add_prefix_cmd ("delete", class_breakpoint, delete_command, | |
6462 | "Delete some breakpoints or auto-display expressions.\n\ | |
6463 | Arguments are breakpoint numbers with spaces in between.\n\ | |
6464 | To delete all breakpoints, give no argument.\n\ | |
6465 | \n\ | |
6466 | Also a prefix command for deletion of other GDB objects.\n\ | |
6467 | The \"unset\" command is also an alias for \"delete\".", | |
6468 | &deletelist, "delete ", 1, &cmdlist); | |
6469 | add_com_alias ("d", "delete", class_breakpoint, 1); | |
6470 | if (xdb_commands) | |
6471 | add_com ("db", class_breakpoint, delete_command, | |
6472 | "Delete some breakpoints.\n\ | |
6473 | Arguments are breakpoint numbers with spaces in between.\n\ | |
6474 | To delete all breakpoints, give no argument.\n"); | |
6475 | ||
6476 | add_cmd ("breakpoints", class_alias, delete_command, | |
6477 | "Delete some breakpoints or auto-display expressions.\n\ | |
6478 | Arguments are breakpoint numbers with spaces in between.\n\ | |
6479 | To delete all breakpoints, give no argument.\n\ | |
6480 | This command may be abbreviated \"delete\".", | |
6481 | &deletelist); | |
6482 | ||
6483 | add_com ("clear", class_breakpoint, clear_command, | |
6484 | concat ("Clear breakpoint at specified line or function.\n\ | |
6485 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
6486 | If line number is specified, all breakpoints in that line are cleared.\n\ | |
6487 | If function is specified, breakpoints at beginning of function are cleared.\n\ | |
6488 | If an address is specified, breakpoints at that address are cleared.\n\n", | |
6489 | "With no argument, clears all breakpoints in the line that the selected frame\n\ | |
6490 | is executing in.\n\ | |
6491 | \n\ | |
6492 | See also the \"delete\" command which clears breakpoints by number.", NULL)); | |
6493 | ||
6494 | add_com ("break", class_breakpoint, break_command, | |
6495 | concat ("Set breakpoint at specified line or function.\n\ | |
6496 | Argument may be line number, function name, or \"*\" and an address.\n\ | |
6497 | If line number is specified, break at start of code for that line.\n\ | |
6498 | If function is specified, break at start of code for that function.\n\ | |
6499 | If an address is specified, break at that exact address.\n", | |
6500 | "With no arg, uses current execution address of selected stack frame.\n\ | |
6501 | This is useful for breaking on return to a stack frame.\n\ | |
6502 | \n\ | |
6503 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
6504 | \n\ | |
6505 | Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL)); | |
6506 | add_com_alias ("b", "break", class_run, 1); | |
6507 | add_com_alias ("br", "break", class_run, 1); | |
6508 | add_com_alias ("bre", "break", class_run, 1); | |
6509 | add_com_alias ("brea", "break", class_run, 1); | |
6510 | ||
6511 | add_com("xbreak", class_breakpoint, break_at_finish_command, | |
6512 | concat("Set breakpoint at procedure exit. \n\ | |
6513 | Argument may be function name, or \"*\" and an address.\n\ | |
6514 | If function is specified, break at end of code for that function.\n\ | |
6515 | If an address is specified, break at the end of the function that contains \n\ | |
6516 | that exact address.\n", | |
6517 | "With no arg, uses current execution address of selected stack frame.\n\ | |
6518 | This is useful for breaking on return to a stack frame.\n\ | |
6519 | \n\ | |
6520 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
6521 | \n\ | |
6522 | Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL)); | |
6523 | add_com_alias ("xb", "xbreak", class_breakpoint, 1); | |
6524 | add_com_alias ("xbr", "xbreak", class_breakpoint, 1); | |
6525 | add_com_alias ("xbre", "xbreak", class_breakpoint, 1); | |
6526 | add_com_alias ("xbrea", "xbreak", class_breakpoint, 1); | |
6527 | ||
6528 | if (xdb_commands) | |
6529 | { | |
6530 | add_com_alias ("ba", "break", class_breakpoint, 1); | |
6531 | add_com_alias ("bu", "ubreak", class_breakpoint, 1); | |
6532 | add_com ("bx", class_breakpoint, break_at_finish_at_depth_command, | |
6533 | "Set breakpoint at procedure exit. Either there should\n\ | |
6534 | be no argument or the argument must be a depth.\n"); | |
6535 | } | |
6536 | ||
6537 | if (dbx_commands) | |
6538 | { | |
6539 | add_abbrev_prefix_cmd("stop", class_breakpoint, stop_command, | |
6540 | "Break in function/address or break at a line in the current file.", | |
6541 | &stoplist, "stop ", 1, &cmdlist); | |
6542 | add_cmd("in", class_breakpoint, stopin_command, | |
6543 | "Break in function or address.\n", &stoplist); | |
6544 | add_cmd("at", class_breakpoint, stopat_command, | |
6545 | "Break at a line in the current file.\n", &stoplist); | |
6546 | add_com("status", class_info, breakpoints_info, | |
6547 | concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ | |
6548 | The \"Type\" column indicates one of:\n\ | |
6549 | \tbreakpoint - normal breakpoint\n\ | |
6550 | \twatchpoint - watchpoint\n\ | |
6551 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |
6552 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
6553 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
6554 | address and file/line number respectively.\n\n", | |
6555 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
6556 | are set to the address of the last breakpoint listed.\n\n\ | |
6557 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
6558 | breakpoint set.", NULL)); | |
6559 | } | |
6560 | ||
6561 | add_info ("breakpoints", breakpoints_info, | |
6562 | concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ | |
6563 | The \"Type\" column indicates one of:\n\ | |
6564 | \tbreakpoint - normal breakpoint\n\ | |
6565 | \twatchpoint - watchpoint\n\ | |
6566 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |
6567 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
6568 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
6569 | address and file/line number respectively.\n\n", | |
6570 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
6571 | are set to the address of the last breakpoint listed.\n\n\ | |
6572 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
6573 | breakpoint set.", NULL)); | |
6574 | ||
6575 | if (xdb_commands) | |
6576 | add_com("lb", class_breakpoint, breakpoints_info, | |
6577 | concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ | |
6578 | The \"Type\" column indicates one of:\n\ | |
6579 | \tbreakpoint - normal breakpoint\n\ | |
6580 | \twatchpoint - watchpoint\n\ | |
6581 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |
6582 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
6583 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
6584 | address and file/line number respectively.\n\n", | |
6585 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
6586 | are set to the address of the last breakpoint listed.\n\n\ | |
6587 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
6588 | breakpoint set.", NULL)); | |
6589 | ||
6590 | #if MAINTENANCE_CMDS | |
6591 | ||
6592 | add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, | |
6593 | concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\ | |
6594 | The \"Type\" column indicates one of:\n\ | |
6595 | \tbreakpoint - normal breakpoint\n\ | |
6596 | \twatchpoint - watchpoint\n\ | |
6597 | \tlongjmp - internal breakpoint used to step through longjmp()\n\ | |
6598 | \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ | |
6599 | \tuntil - internal breakpoint used by the \"until\" command\n\ | |
6600 | \tfinish - internal breakpoint used by the \"finish\" command\n", | |
6601 | "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |
6602 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |
6603 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |
6604 | address and file/line number respectively.\n\n", | |
6605 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |
6606 | are set to the address of the last breakpoint listed.\n\n\ | |
6607 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |
6608 | breakpoint set.", NULL), | |
6609 | &maintenanceinfolist); | |
6610 | ||
6611 | #endif /* MAINTENANCE_CMDS */ | |
6612 | ||
6613 | add_com ("catch", class_breakpoint, catch_command, | |
6614 | "Set catchpoints to catch events.\n\ | |
6615 | Raised signals may be caught:\n\ | |
6616 | \tcatch signal - all signals\n\ | |
6617 | \tcatch signal <signame> - a particular signal\n\ | |
6618 | Raised exceptions may be caught:\n\ | |
6619 | \tcatch throw - all exceptions, when thrown\n\ | |
6620 | \tcatch throw <exceptname> - a particular exception, when thrown\n\ | |
6621 | \tcatch catch - all exceptions, when caught\n\ | |
6622 | \tcatch catch <exceptname> - a particular exception, when caught\n\ | |
6623 | Thread or process events may be caught:\n\ | |
6624 | \tcatch thread_start - any threads, just after creation\n\ | |
6625 | \tcatch thread_exit - any threads, just before expiration\n\ | |
6626 | \tcatch thread_join - any threads, just after joins\n\ | |
6627 | Process events may be caught:\n\ | |
6628 | \tcatch start - any processes, just after creation\n\ | |
6629 | \tcatch exit - any processes, just before expiration\n\ | |
6630 | \tcatch fork - calls to fork()\n\ | |
6631 | \tcatch vfork - calls to vfork()\n\ | |
6632 | \tcatch exec - calls to exec()\n\ | |
6633 | Dynamically-linked library events may be caught:\n\ | |
6634 | \tcatch load - loads of any library\n\ | |
6635 | \tcatch load <libname> - loads of a particular library\n\ | |
6636 | \tcatch unload - unloads of any library\n\ | |
6637 | \tcatch unload <libname> - unloads of a particular library\n\ | |
6638 | The act of your program's execution stopping may also be caught:\n\ | |
6639 | \tcatch stop\n\n\ | |
6640 | C++ exceptions may be caught:\n\ | |
6641 | \tcatch throw - all exceptions, when thrown\n\ | |
6642 | \tcatch catch - all exceptions, when caught\n\ | |
6643 | \n\ | |
6644 | Do \"help set follow-fork-mode\" for info on debugging your program\n\ | |
6645 | after a fork or vfork is caught.\n\n\ | |
6646 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |
6647 | ||
6648 | add_com ("tcatch", class_breakpoint, tcatch_command, | |
6649 | "Set temporary catchpoints to catch events.\n\ | |
6650 | Args like \"catch\" command.\n\ | |
6651 | Like \"catch\" except the catchpoint is only temporary,\n\ | |
6652 | so it will be deleted when hit. Equivalent to \"catch\" followed\n\ | |
6653 | by using \"enable delete\" on the catchpoint number."); | |
6654 | ||
6655 | add_com ("watch", class_breakpoint, watch_command, | |
6656 | ||
6657 | "Set a watchpoint for an expression.\n\ | |
6658 | A watchpoint stops execution of your program whenever the value of\n\ | |
6659 | an expression changes."); | |
6660 | ||
6661 | add_com ("rwatch", class_breakpoint, rwatch_command, | |
6662 | "Set a read watchpoint for an expression.\n\ | |
6663 | A watchpoint stops execution of your program whenever the value of\n\ | |
6664 | an expression is read."); | |
6665 | ||
6666 | add_com ("awatch", class_breakpoint, awatch_command, | |
6667 | "Set a watchpoint for an expression.\n\ | |
6668 | A watchpoint stops execution of your program whenever the value of\n\ | |
6669 | an expression is either read or written."); | |
6670 | ||
6671 | add_info ("watchpoints", breakpoints_info, | |
6672 | "Synonym for ``info breakpoints''."); | |
6673 | ||
6674 | ||
6675 | c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger, | |
6676 | (char *) &can_use_hw_watchpoints, | |
6677 | "Set debugger's willingness to use watchpoint hardware.\n\ | |
6678 | If zero, gdb will not use hardware for new watchpoints, even if\n\ | |
6679 | such is available. (However, any hardware watchpoints that were\n\ | |
6680 | created before setting this to nonzero, will continue to use watchpoint\n\ | |
6681 | hardware.)", | |
6682 | &setlist); | |
6683 | add_show_from_set (c, &showlist); | |
6684 | ||
6685 | can_use_hw_watchpoints = 1; | |
6686 | } |