File: | src/gnu/usr.bin/binutils/gdb/breakpoint.c |
Warning: | line 6878, column 16 Access to field 'next' results in a dereference of a null pointer (loaded from variable 'prev') |
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1 | /* Everything about breakpoints, for GDB. | |||
2 | ||||
3 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, | |||
4 | 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 | |||
5 | Free Software Foundation, Inc. | |||
6 | ||||
7 | This file is part of GDB. | |||
8 | ||||
9 | This program is free software; you can redistribute it and/or modify | |||
10 | it under the terms of the GNU General Public License as published by | |||
11 | the Free Software Foundation; either version 2 of the License, or | |||
12 | (at your option) any later version. | |||
13 | ||||
14 | This program is distributed in the hope that it will be useful, | |||
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |||
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |||
17 | GNU General Public License for more details. | |||
18 | ||||
19 | You should have received a copy of the GNU General Public License | |||
20 | along with this program; if not, write to the Free Software | |||
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |||
22 | Boston, MA 02111-1307, USA. */ | |||
23 | ||||
24 | #include "defs.h" | |||
25 | #include <ctype.h> | |||
26 | #include "symtab.h" | |||
27 | #include "frame.h" | |||
28 | #include "breakpoint.h" | |||
29 | #include "gdbtypes.h" | |||
30 | #include "expression.h" | |||
31 | #include "gdbcore.h" | |||
32 | #include "gdbcmd.h" | |||
33 | #include "value.h" | |||
34 | #include "command.h" | |||
35 | #include "inferior.h" | |||
36 | #include "gdbthread.h" | |||
37 | #include "target.h" | |||
38 | #include "language.h" | |||
39 | #include "gdb_string.h" | |||
40 | #include "demangle.h" | |||
41 | #include "annotate.h" | |||
42 | #include "symfile.h" | |||
43 | #include "objfiles.h" | |||
44 | #include "source.h" | |||
45 | #include "linespec.h" | |||
46 | #include "completer.h" | |||
47 | #include "gdb.h" | |||
48 | #include "ui-out.h" | |||
49 | #include "cli/cli-script.h" | |||
50 | #include "gdb_assert.h" | |||
51 | #include "block.h" | |||
52 | #include "solist.h" | |||
53 | #include "observer.h" | |||
54 | ||||
55 | #include "gdb-events.h" | |||
56 | ||||
57 | /* Prototypes for local functions. */ | |||
58 | ||||
59 | static void until_break_command_continuation (struct continuation_arg *arg); | |||
60 | ||||
61 | static void catch_command_1 (char *, int, int); | |||
62 | ||||
63 | static void enable_delete_command (char *, int); | |||
64 | ||||
65 | static void enable_delete_breakpoint (struct breakpoint *); | |||
66 | ||||
67 | static void enable_once_command (char *, int); | |||
68 | ||||
69 | static void enable_once_breakpoint (struct breakpoint *); | |||
70 | ||||
71 | static void disable_command (char *, int); | |||
72 | ||||
73 | static void enable_command (char *, int); | |||
74 | ||||
75 | static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *)); | |||
76 | ||||
77 | static void ignore_command (char *, int); | |||
78 | ||||
79 | static int breakpoint_re_set_one (void *); | |||
80 | ||||
81 | static void clear_command (char *, int); | |||
82 | ||||
83 | static void catch_command (char *, int); | |||
84 | ||||
85 | static void watch_command (char *, int); | |||
86 | ||||
87 | static int can_use_hardware_watchpoint (struct value *); | |||
88 | ||||
89 | extern void break_at_finish_command (char *, int); | |||
90 | extern void break_at_finish_at_depth_command (char *, int); | |||
91 | ||||
92 | extern void tbreak_at_finish_command (char *, int); | |||
93 | ||||
94 | static int break_command_1 (char *, int, int, struct breakpoint *); | |||
95 | ||||
96 | static void mention (struct breakpoint *); | |||
97 | ||||
98 | struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype); | |||
99 | ||||
100 | static void check_duplicates (struct breakpoint *); | |||
101 | ||||
102 | static void breakpoint_adjustment_warning (CORE_ADDR, CORE_ADDR, int, int); | |||
103 | ||||
104 | static CORE_ADDR adjust_breakpoint_address (CORE_ADDR bpaddr, | |||
105 | enum bptype bptype); | |||
106 | ||||
107 | static void describe_other_breakpoints (CORE_ADDR, asection *); | |||
108 | ||||
109 | static void breakpoints_info (char *, int); | |||
110 | ||||
111 | static void breakpoint_1 (int, int); | |||
112 | ||||
113 | static bpstat bpstat_alloc (struct breakpoint *, bpstat); | |||
114 | ||||
115 | static int breakpoint_cond_eval (void *); | |||
116 | ||||
117 | static void cleanup_executing_breakpoints (void *); | |||
118 | ||||
119 | static void commands_command (char *, int); | |||
120 | ||||
121 | static void condition_command (char *, int); | |||
122 | ||||
123 | static int get_number_trailer (char **, int); | |||
124 | ||||
125 | static int do_captured_parse_breakpoint (struct ui_out *, void *); | |||
126 | ||||
127 | void set_breakpoint_count (int); | |||
128 | ||||
129 | typedef enum | |||
130 | { | |||
131 | mark_inserted, | |||
132 | mark_uninserted | |||
133 | } | |||
134 | insertion_state_t; | |||
135 | ||||
136 | static int remove_breakpoint (struct bp_location *, insertion_state_t); | |||
137 | ||||
138 | static enum print_stop_action print_it_typical (bpstat); | |||
139 | ||||
140 | static enum print_stop_action print_bp_stop_message (bpstat bs); | |||
141 | ||||
142 | typedef struct | |||
143 | { | |||
144 | enum exception_event_kind kind; | |||
145 | int enable_p; | |||
146 | } | |||
147 | args_for_catchpoint_enable; | |||
148 | ||||
149 | static int watchpoint_check (void *); | |||
150 | ||||
151 | static int cover_target_enable_exception_callback (void *); | |||
152 | ||||
153 | static void maintenance_info_breakpoints (char *, int); | |||
154 | ||||
155 | static void create_longjmp_breakpoint (char *); | |||
156 | ||||
157 | static void create_overlay_event_breakpoint (char *); | |||
158 | ||||
159 | static int hw_breakpoint_used_count (void); | |||
160 | ||||
161 | static int hw_watchpoint_used_count (enum bptype, int *); | |||
162 | ||||
163 | static void hbreak_command (char *, int); | |||
164 | ||||
165 | static void thbreak_command (char *, int); | |||
166 | ||||
167 | static void watch_command_1 (char *, int, int); | |||
168 | ||||
169 | static void rwatch_command (char *, int); | |||
170 | ||||
171 | static void awatch_command (char *, int); | |||
172 | ||||
173 | static void do_enable_breakpoint (struct breakpoint *, enum bpdisp); | |||
174 | ||||
175 | static void solib_load_unload_1 (char *hookname, | |||
176 | int tempflag, | |||
177 | char *dll_pathname, | |||
178 | char *cond_string, enum bptype bp_kind); | |||
179 | ||||
180 | static void create_fork_vfork_event_catchpoint (int tempflag, | |||
181 | char *cond_string, | |||
182 | enum bptype bp_kind); | |||
183 | ||||
184 | static void break_at_finish_at_depth_command_1 (char *arg, | |||
185 | int flag, int from_tty); | |||
186 | ||||
187 | static void break_at_finish_command_1 (char *arg, int flag, int from_tty); | |||
188 | ||||
189 | static void stop_command (char *arg, int from_tty); | |||
190 | ||||
191 | static void stopin_command (char *arg, int from_tty); | |||
192 | ||||
193 | static void stopat_command (char *arg, int from_tty); | |||
194 | ||||
195 | static char *ep_find_event_name_end (char *arg); | |||
196 | ||||
197 | static char *ep_parse_optional_if_clause (char **arg); | |||
198 | ||||
199 | static char *ep_parse_optional_filename (char **arg); | |||
200 | ||||
201 | static void create_exception_catchpoint (int tempflag, char *cond_string, | |||
202 | enum exception_event_kind ex_event, | |||
203 | struct symtab_and_line *sal); | |||
204 | ||||
205 | static void catch_exception_command_1 (enum exception_event_kind ex_event, | |||
206 | char *arg, int tempflag, int from_tty); | |||
207 | ||||
208 | static void tcatch_command (char *arg, int from_tty); | |||
209 | ||||
210 | static void ep_skip_leading_whitespace (char **s); | |||
211 | ||||
212 | /* Prototypes for exported functions. */ | |||
213 | ||||
214 | /* If FALSE, gdb will not use hardware support for watchpoints, even | |||
215 | if such is available. */ | |||
216 | static int can_use_hw_watchpoints; | |||
217 | ||||
218 | /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints. | |||
219 | If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints | |||
220 | for unrecognized breakpoint locations. | |||
221 | If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */ | |||
222 | static enum auto_boolean pending_break_support; | |||
223 | ||||
224 | void _initialize_breakpoint (void); | |||
225 | ||||
226 | extern int addressprint; /* Print machine addresses? */ | |||
227 | ||||
228 | /* Are we executing breakpoint commands? */ | |||
229 | static int executing_breakpoint_commands; | |||
230 | ||||
231 | /* Are overlay event breakpoints enabled? */ | |||
232 | static int overlay_events_enabled; | |||
233 | ||||
234 | /* Walk the following statement or block through all breakpoints. | |||
235 | ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current | |||
236 | breakpoint. */ | |||
237 | ||||
238 | #define ALL_BREAKPOINTS(B)for (B = breakpoint_chain; B; B = B->next) for (B = breakpoint_chain; B; B = B->next) | |||
239 | ||||
240 | #define ALL_BREAKPOINTS_SAFE(B,TMP)for (B = breakpoint_chain; B ? (TMP=B->next, 1): 0; B = TMP ) \ | |||
241 | for (B = breakpoint_chain; \ | |||
242 | B ? (TMP=B->next, 1): 0; \ | |||
243 | B = TMP) | |||
244 | ||||
245 | /* Similar iterators for the low-level breakpoints. */ | |||
246 | ||||
247 | #define ALL_BP_LOCATIONS(B)for (B = bp_location_chain; B; B = B->next) for (B = bp_location_chain; B; B = B->next) | |||
248 | ||||
249 | #define ALL_BP_LOCATIONS_SAFE(B,TMP)for (B = bp_location_chain; B ? (TMP=B->next, 1): 0; B = TMP ) \ | |||
250 | for (B = bp_location_chain; \ | |||
251 | B ? (TMP=B->next, 1): 0; \ | |||
252 | B = TMP) | |||
253 | ||||
254 | /* True if breakpoint hit counts should be displayed in breakpoint info. */ | |||
255 | ||||
256 | int show_breakpoint_hit_counts = 1; | |||
257 | ||||
258 | /* Chains of all breakpoints defined. */ | |||
259 | ||||
260 | struct breakpoint *breakpoint_chain; | |||
261 | ||||
262 | struct bp_location *bp_location_chain; | |||
263 | ||||
264 | /* Number of last breakpoint made. */ | |||
265 | ||||
266 | int breakpoint_count; | |||
267 | ||||
268 | /* Pointer to current exception event record */ | |||
269 | static struct exception_event_record *current_exception_event; | |||
270 | ||||
271 | /* Indicator of whether exception catchpoints should be nuked between | |||
272 | runs of a program. */ | |||
273 | int deprecated_exception_catchpoints_are_fragile = 0; | |||
274 | ||||
275 | /* Indicator of when exception catchpoints set-up should be | |||
276 | reinitialized -- e.g. when program is re-run. */ | |||
277 | int deprecated_exception_support_initialized = 0; | |||
278 | ||||
279 | /* This function returns a pointer to the string representation of the | |||
280 | pathname of the dynamically-linked library that has just been | |||
281 | loaded. | |||
282 | ||||
283 | This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE, | |||
284 | or undefined results are guaranteed. | |||
285 | ||||
286 | This string's contents are only valid immediately after the | |||
287 | inferior has stopped in the dynamic linker hook, and becomes | |||
288 | invalid as soon as the inferior is continued. Clients should make | |||
289 | a copy of this string if they wish to continue the inferior and | |||
290 | then access the string. */ | |||
291 | ||||
292 | #ifndef SOLIB_LOADED_LIBRARY_PATHNAME | |||
293 | #define SOLIB_LOADED_LIBRARY_PATHNAME(pid)"" "" | |||
294 | #endif | |||
295 | ||||
296 | /* This function returns a pointer to the string representation of the | |||
297 | pathname of the dynamically-linked library that has just been | |||
298 | unloaded. | |||
299 | ||||
300 | This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is | |||
301 | TRUE, or undefined results are guaranteed. | |||
302 | ||||
303 | This string's contents are only valid immediately after the | |||
304 | inferior has stopped in the dynamic linker hook, and becomes | |||
305 | invalid as soon as the inferior is continued. Clients should make | |||
306 | a copy of this string if they wish to continue the inferior and | |||
307 | then access the string. */ | |||
308 | ||||
309 | #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME | |||
310 | #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid)"" "" | |||
311 | #endif | |||
312 | ||||
313 | /* This function is called by the "catch load" command. It allows the | |||
314 | debugger to be notified by the dynamic linker when a specified | |||
315 | library file (or any library file, if filename is NULL) is loaded. */ | |||
316 | ||||
317 | #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK | |||
318 | #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string)error ("catch of library loads not yet implemented on this platform" ) \ | |||
319 | error ("catch of library loads not yet implemented on this platform") | |||
320 | #endif | |||
321 | ||||
322 | /* This function is called by the "catch unload" command. It allows | |||
323 | the debugger to be notified by the dynamic linker when a specified | |||
324 | library file (or any library file, if filename is NULL) is | |||
325 | unloaded. */ | |||
326 | ||||
327 | #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK | |||
328 | #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string)error ("catch of library unloads not yet implemented on this platform" ) \ | |||
329 | error ("catch of library unloads not yet implemented on this platform") | |||
330 | #endif | |||
331 | ||||
332 | /* Return whether a breakpoint is an active enabled breakpoint. */ | |||
333 | static int | |||
334 | breakpoint_enabled (struct breakpoint *b) | |||
335 | { | |||
336 | return (b->enable_state == bp_enabled && !b->pending); | |||
337 | } | |||
338 | ||||
339 | /* Set breakpoint count to NUM. */ | |||
340 | ||||
341 | void | |||
342 | set_breakpoint_count (int num) | |||
343 | { | |||
344 | breakpoint_count = num; | |||
345 | set_internalvar (lookup_internalvar ("bpnum"), | |||
346 | value_from_longest (builtin_type_int, (LONGESTlong) num)); | |||
347 | } | |||
348 | ||||
349 | /* Used in run_command to zero the hit count when a new run starts. */ | |||
350 | ||||
351 | void | |||
352 | clear_breakpoint_hit_counts (void) | |||
353 | { | |||
354 | struct breakpoint *b; | |||
355 | ||||
356 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
357 | b->hit_count = 0; | |||
358 | } | |||
359 | ||||
360 | /* Default address, symtab and line to put a breakpoint at | |||
361 | for "break" command with no arg. | |||
362 | if default_breakpoint_valid is zero, the other three are | |||
363 | not valid, and "break" with no arg is an error. | |||
364 | ||||
365 | This set by print_stack_frame, which calls set_default_breakpoint. */ | |||
366 | ||||
367 | int default_breakpoint_valid; | |||
368 | CORE_ADDR default_breakpoint_address; | |||
369 | struct symtab *default_breakpoint_symtab; | |||
370 | int default_breakpoint_line; | |||
371 | ||||
372 | /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. | |||
373 | Advance *PP after the string and any trailing whitespace. | |||
374 | ||||
375 | Currently the string can either be a number or "$" followed by the name | |||
376 | of a convenience variable. Making it an expression wouldn't work well | |||
377 | for map_breakpoint_numbers (e.g. "4 + 5 + 6"). | |||
378 | ||||
379 | TRAILER is a character which can be found after the number; most | |||
380 | commonly this is `-'. If you don't want a trailer, use \0. */ | |||
381 | static int | |||
382 | get_number_trailer (char **pp, int trailer) | |||
383 | { | |||
384 | int retval = 0; /* default */ | |||
385 | char *p = *pp; | |||
386 | ||||
387 | if (p == NULL((void*)0)) | |||
388 | /* Empty line means refer to the last breakpoint. */ | |||
389 | return breakpoint_count; | |||
390 | else if (*p == '$') | |||
391 | { | |||
392 | /* Make a copy of the name, so we can null-terminate it | |||
393 | to pass to lookup_internalvar(). */ | |||
394 | char *varname; | |||
395 | char *start = ++p; | |||
396 | struct value *val; | |||
397 | ||||
398 | while (isalnum (*p) || *p == '_') | |||
399 | p++; | |||
400 | varname = (char *) alloca (p - start + 1)__builtin_alloca(p - start + 1); | |||
401 | strncpy (varname, start, p - start); | |||
402 | varname[p - start] = '\0'; | |||
403 | val = value_of_internalvar (lookup_internalvar (varname)); | |||
404 | if (TYPE_CODE (VALUE_TYPE (val))((val)->type)->main_type->code == TYPE_CODE_INT) | |||
405 | retval = (int) value_as_long (val); | |||
406 | else | |||
407 | { | |||
408 | printf_filtered ("Convenience variable must have integer value.\n"); | |||
409 | retval = 0; | |||
410 | } | |||
411 | } | |||
412 | else | |||
413 | { | |||
414 | if (*p == '-') | |||
415 | ++p; | |||
416 | while (*p >= '0' && *p <= '9') | |||
417 | ++p; | |||
418 | if (p == *pp) | |||
419 | /* There is no number here. (e.g. "cond a == b"). */ | |||
420 | { | |||
421 | /* Skip non-numeric token */ | |||
422 | while (*p && !isspace((int) *p)) | |||
423 | ++p; | |||
424 | /* Return zero, which caller must interpret as error. */ | |||
425 | retval = 0; | |||
426 | } | |||
427 | else | |||
428 | retval = atoi (*pp); | |||
429 | } | |||
430 | if (!(isspace (*p) || *p == '\0' || *p == trailer)) | |||
431 | { | |||
432 | /* Trailing junk: return 0 and let caller print error msg. */ | |||
433 | while (!(isspace (*p) || *p == '\0' || *p == trailer)) | |||
434 | ++p; | |||
435 | retval = 0; | |||
436 | } | |||
437 | while (isspace (*p)) | |||
438 | p++; | |||
439 | *pp = p; | |||
440 | return retval; | |||
441 | } | |||
442 | ||||
443 | ||||
444 | /* Like get_number_trailer, but don't allow a trailer. */ | |||
445 | int | |||
446 | get_number (char **pp) | |||
447 | { | |||
448 | return get_number_trailer (pp, '\0'); | |||
449 | } | |||
450 | ||||
451 | /* Parse a number or a range. | |||
452 | * A number will be of the form handled by get_number. | |||
453 | * A range will be of the form <number1> - <number2>, and | |||
454 | * will represent all the integers between number1 and number2, | |||
455 | * inclusive. | |||
456 | * | |||
457 | * While processing a range, this fuction is called iteratively; | |||
458 | * At each call it will return the next value in the range. | |||
459 | * | |||
460 | * At the beginning of parsing a range, the char pointer PP will | |||
461 | * be advanced past <number1> and left pointing at the '-' token. | |||
462 | * Subsequent calls will not advance the pointer until the range | |||
463 | * is completed. The call that completes the range will advance | |||
464 | * pointer PP past <number2>. | |||
465 | */ | |||
466 | ||||
467 | int | |||
468 | get_number_or_range (char **pp) | |||
469 | { | |||
470 | static int last_retval, end_value; | |||
471 | static char *end_ptr; | |||
472 | static int in_range = 0; | |||
473 | ||||
474 | if (**pp != '-') | |||
475 | { | |||
476 | /* Default case: pp is pointing either to a solo number, | |||
477 | or to the first number of a range. */ | |||
478 | last_retval = get_number_trailer (pp, '-'); | |||
479 | if (**pp == '-') | |||
480 | { | |||
481 | char **temp; | |||
482 | ||||
483 | /* This is the start of a range (<number1> - <number2>). | |||
484 | Skip the '-', parse and remember the second number, | |||
485 | and also remember the end of the final token. */ | |||
486 | ||||
487 | temp = &end_ptr; | |||
488 | end_ptr = *pp + 1; | |||
489 | while (isspace ((int) *end_ptr)) | |||
490 | end_ptr++; /* skip white space */ | |||
491 | end_value = get_number (temp); | |||
492 | if (end_value < last_retval) | |||
493 | { | |||
494 | error ("inverted range"); | |||
495 | } | |||
496 | else if (end_value == last_retval) | |||
497 | { | |||
498 | /* degenerate range (number1 == number2). Advance the | |||
499 | token pointer so that the range will be treated as a | |||
500 | single number. */ | |||
501 | *pp = end_ptr; | |||
502 | } | |||
503 | else | |||
504 | in_range = 1; | |||
505 | } | |||
506 | } | |||
507 | else if (! in_range) | |||
508 | error ("negative value"); | |||
509 | else | |||
510 | { | |||
511 | /* pp points to the '-' that betokens a range. All | |||
512 | number-parsing has already been done. Return the next | |||
513 | integer value (one greater than the saved previous value). | |||
514 | Do not advance the token pointer 'pp' until the end of range | |||
515 | is reached. */ | |||
516 | ||||
517 | if (++last_retval == end_value) | |||
518 | { | |||
519 | /* End of range reached; advance token pointer. */ | |||
520 | *pp = end_ptr; | |||
521 | in_range = 0; | |||
522 | } | |||
523 | } | |||
524 | return last_retval; | |||
525 | } | |||
526 | ||||
527 | ||||
528 | ||||
529 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ | |||
530 | ||||
531 | static void | |||
532 | condition_command (char *arg, int from_tty) | |||
533 | { | |||
534 | struct breakpoint *b; | |||
535 | char *p; | |||
536 | int bnum; | |||
537 | ||||
538 | if (arg == 0) | |||
539 | error_no_arg ("breakpoint number"); | |||
540 | ||||
541 | p = arg; | |||
542 | bnum = get_number (&p); | |||
543 | if (bnum == 0) | |||
544 | error ("Bad breakpoint argument: '%s'", arg); | |||
545 | ||||
546 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
547 | if (b->number == bnum) | |||
548 | { | |||
549 | if (b->cond) | |||
550 | { | |||
551 | xfree (b->cond); | |||
552 | b->cond = 0; | |||
553 | } | |||
554 | if (b->cond_string != NULL((void*)0)) | |||
555 | xfree (b->cond_string); | |||
556 | ||||
557 | if (*p == 0) | |||
558 | { | |||
559 | b->cond = 0; | |||
560 | b->cond_string = NULL((void*)0); | |||
561 | if (from_tty) | |||
562 | printf_filtered ("Breakpoint %d now unconditional.\n", bnum); | |||
563 | } | |||
564 | else | |||
565 | { | |||
566 | arg = p; | |||
567 | /* I don't know if it matters whether this is the string the user | |||
568 | typed in or the decompiled expression. */ | |||
569 | b->cond_string = savestring (arg, strlen (arg)); | |||
570 | if (!b->pending) | |||
571 | { | |||
572 | b->cond = parse_exp_1 (&arg, block_for_pc (b->loc->address), 0); | |||
573 | if (*arg) | |||
574 | error ("Junk at end of expression"); | |||
575 | } | |||
576 | } | |||
577 | breakpoints_changed (); | |||
578 | breakpoint_modify_event (b->number); | |||
579 | return; | |||
580 | } | |||
581 | ||||
582 | error ("No breakpoint number %d.", bnum); | |||
583 | } | |||
584 | ||||
585 | static void | |||
586 | commands_command (char *arg, int from_tty) | |||
587 | { | |||
588 | struct breakpoint *b; | |||
589 | char *p; | |||
590 | int bnum; | |||
591 | struct command_line *l; | |||
592 | ||||
593 | /* If we allowed this, we would have problems with when to | |||
594 | free the storage, if we change the commands currently | |||
595 | being read from. */ | |||
596 | ||||
597 | if (executing_breakpoint_commands) | |||
598 | error ("Can't use the \"commands\" command among a breakpoint's commands."); | |||
599 | ||||
600 | p = arg; | |||
601 | bnum = get_number (&p); | |||
602 | ||||
603 | if (p && *p) | |||
604 | error ("Unexpected extra arguments following breakpoint number."); | |||
605 | ||||
606 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
607 | if (b->number == bnum) | |||
608 | { | |||
609 | char *tmpbuf = xstrprintf ("Type commands for when breakpoint %d is hit, one per line.", | |||
610 | bnum); | |||
611 | struct cleanup *cleanups = make_cleanup (xfree, tmpbuf); | |||
612 | l = read_command_lines (tmpbuf, from_tty); | |||
613 | do_cleanups (cleanups); | |||
614 | free_command_lines (&b->commands); | |||
615 | b->commands = l; | |||
616 | breakpoints_changed (); | |||
617 | breakpoint_modify_event (b->number); | |||
618 | return; | |||
619 | } | |||
620 | error ("No breakpoint number %d.", bnum); | |||
621 | } | |||
622 | ||||
623 | /* Like target_read_memory() but if breakpoints are inserted, return | |||
624 | the shadow contents instead of the breakpoints themselves. | |||
625 | ||||
626 | Read "memory data" from whatever target or inferior we have. | |||
627 | Returns zero if successful, errno value if not. EIO is used | |||
628 | for address out of bounds. If breakpoints are inserted, returns | |||
629 | shadow contents, not the breakpoints themselves. From breakpoint.c. */ | |||
630 | ||||
631 | int | |||
632 | deprecated_read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len) | |||
633 | { | |||
634 | int status; | |||
635 | struct bp_location *b; | |||
636 | CORE_ADDR bp_addr = 0; | |||
637 | int bp_size = 0; | |||
638 | ||||
639 | if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size)(gdbarch_breakpoint_from_pc (current_gdbarch, &bp_addr, & bp_size)) == NULL((void*)0)) | |||
640 | /* No breakpoints on this machine. */ | |||
641 | return target_read_memory (memaddr, myaddr, len); | |||
642 | ||||
643 | ALL_BP_LOCATIONS (b)for (b = bp_location_chain; b; b = b->next) | |||
644 | { | |||
645 | if (b->owner->type == bp_none) | |||
646 | warning ("reading through apparently deleted breakpoint #%d?", | |||
647 | b->owner->number); | |||
648 | ||||
649 | if (b->loc_type != bp_loc_software_breakpoint) | |||
650 | continue; | |||
651 | if (!b->inserted) | |||
652 | continue; | |||
653 | /* Addresses and length of the part of the breakpoint that | |||
654 | we need to copy. */ | |||
655 | /* XXXX The m68k, sh and h8300 have different local and remote | |||
656 | breakpoint values. BREAKPOINT_FROM_PC still manages to | |||
657 | correctly determine the breakpoints memory address and size | |||
658 | for these targets. */ | |||
659 | bp_addr = b->address; | |||
660 | bp_size = 0; | |||
661 | if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size)(gdbarch_breakpoint_from_pc (current_gdbarch, &bp_addr, & bp_size)) == NULL((void*)0)) | |||
662 | continue; | |||
663 | if (bp_size == 0) | |||
664 | /* bp isn't valid */ | |||
665 | continue; | |||
666 | if (bp_addr + bp_size <= memaddr) | |||
667 | /* The breakpoint is entirely before the chunk of memory we | |||
668 | are reading. */ | |||
669 | continue; | |||
670 | if (bp_addr >= memaddr + len) | |||
671 | /* The breakpoint is entirely after the chunk of memory we are | |||
672 | reading. */ | |||
673 | continue; | |||
674 | /* Copy the breakpoint from the shadow contents, and recurse for | |||
675 | the things before and after. */ | |||
676 | { | |||
677 | /* Offset within shadow_contents. */ | |||
678 | int bptoffset = 0; | |||
679 | ||||
680 | if (bp_addr < memaddr) | |||
681 | { | |||
682 | /* Only copy the second part of the breakpoint. */ | |||
683 | bp_size -= memaddr - bp_addr; | |||
684 | bptoffset = memaddr - bp_addr; | |||
685 | bp_addr = memaddr; | |||
686 | } | |||
687 | ||||
688 | if (bp_addr + bp_size > memaddr + len) | |||
689 | { | |||
690 | /* Only copy the first part of the breakpoint. */ | |||
691 | bp_size -= (bp_addr + bp_size) - (memaddr + len); | |||
692 | } | |||
693 | ||||
694 | memcpy (myaddr + bp_addr - memaddr, | |||
695 | b->shadow_contents + bptoffset, bp_size); | |||
696 | ||||
697 | if (bp_addr > memaddr) | |||
698 | { | |||
699 | /* Copy the section of memory before the breakpoint. */ | |||
700 | status = deprecated_read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr); | |||
701 | if (status != 0) | |||
702 | return status; | |||
703 | } | |||
704 | ||||
705 | if (bp_addr + bp_size < memaddr + len) | |||
706 | { | |||
707 | /* Copy the section of memory after the breakpoint. */ | |||
708 | status = deprecated_read_memory_nobpt (bp_addr + bp_size, | |||
709 | myaddr + bp_addr + bp_size - memaddr, | |||
710 | memaddr + len - (bp_addr + bp_size)); | |||
711 | if (status != 0) | |||
712 | return status; | |||
713 | } | |||
714 | return 0; | |||
715 | } | |||
716 | } | |||
717 | /* Nothing overlaps. Just call read_memory_noerr. */ | |||
718 | return target_read_memory (memaddr, myaddr, len); | |||
719 | } | |||
720 | ||||
721 | ||||
722 | /* A wrapper function for inserting catchpoints. */ | |||
723 | static int | |||
724 | insert_catchpoint (struct ui_out *uo, void *args) | |||
725 | { | |||
726 | struct breakpoint *b = (struct breakpoint *) args; | |||
727 | int val = -1; | |||
728 | ||||
729 | switch (b->type) | |||
730 | { | |||
731 | case bp_catch_fork: | |||
732 | val = target_insert_fork_catchpoint (PIDGET (inferior_ptid))(*current_target.to_insert_fork_catchpoint) ((ptid_get_pid (inferior_ptid ))); | |||
733 | break; | |||
734 | case bp_catch_vfork: | |||
735 | val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid))(*current_target.to_insert_vfork_catchpoint) ((ptid_get_pid ( inferior_ptid))); | |||
736 | break; | |||
737 | case bp_catch_exec: | |||
738 | val = target_insert_exec_catchpoint (PIDGET (inferior_ptid))(*current_target.to_insert_exec_catchpoint) ((ptid_get_pid (inferior_ptid ))); | |||
739 | break; | |||
740 | default: | |||
741 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__741, "unknown breakpoint type"); | |||
742 | break; | |||
743 | } | |||
744 | ||||
745 | if (val < 0) | |||
746 | throw_exception (RETURN_ERROR); | |||
747 | ||||
748 | return 0; | |||
749 | } | |||
750 | ||||
751 | /* Helper routine: free the value chain for a breakpoint (watchpoint). */ | |||
752 | ||||
753 | static void free_valchain (struct bp_location *b) | |||
754 | { | |||
755 | struct value *v; | |||
756 | struct value *n; | |||
757 | ||||
758 | /* Free the saved value chain. We will construct a new one | |||
759 | the next time the watchpoint is inserted. */ | |||
760 | for (v = b->owner->val_chain; v; v = n) | |||
761 | { | |||
762 | n = v->next; | |||
763 | value_free (v)xfree (v); | |||
764 | } | |||
765 | b->owner->val_chain = NULL((void*)0); | |||
766 | } | |||
767 | ||||
768 | /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint. | |||
769 | Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS, | |||
770 | PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems. | |||
771 | ||||
772 | NOTE drow/2003-09-09: This routine could be broken down to an object-style | |||
773 | method for each breakpoint or catchpoint type. */ | |||
774 | static int | |||
775 | insert_bp_location (struct bp_location *bpt, | |||
776 | struct ui_file *tmp_error_stream, | |||
777 | int *disabled_breaks, int *process_warning, | |||
778 | int *hw_breakpoint_error) | |||
779 | { | |||
780 | int val = 0; | |||
781 | ||||
782 | /* Permanent breakpoints cannot be inserted or removed. Disabled | |||
783 | breakpoints should not be inserted. */ | |||
784 | if (!breakpoint_enabled (bpt->owner)) | |||
785 | return 0; | |||
786 | ||||
787 | if (bpt->inserted || bpt->duplicate) | |||
788 | return 0; | |||
789 | ||||
790 | if (bpt->loc_type == bp_loc_software_breakpoint | |||
791 | || bpt->loc_type == bp_loc_hardware_breakpoint) | |||
792 | { | |||
793 | /* First check to see if we have to handle an overlay. */ | |||
794 | if (overlay_debugging == ovly_off | |||
795 | || bpt->section == NULL((void*)0) | |||
796 | || !(section_is_overlay (bpt->section))) | |||
797 | { | |||
798 | /* No overlay handling: just set the breakpoint. */ | |||
799 | ||||
800 | if (bpt->loc_type == bp_loc_hardware_breakpoint) | |||
801 | val = target_insert_hw_breakpoint (bpt->address,(*current_target.to_insert_hw_breakpoint) (bpt->address, bpt ->shadow_contents) | |||
802 | bpt->shadow_contents)(*current_target.to_insert_hw_breakpoint) (bpt->address, bpt ->shadow_contents); | |||
803 | else | |||
804 | val = target_insert_breakpoint (bpt->address,(*current_target.to_insert_breakpoint) (bpt->address, bpt-> shadow_contents) | |||
805 | bpt->shadow_contents)(*current_target.to_insert_breakpoint) (bpt->address, bpt-> shadow_contents); | |||
806 | } | |||
807 | else | |||
808 | { | |||
809 | /* This breakpoint is in an overlay section. | |||
810 | Shall we set a breakpoint at the LMA? */ | |||
811 | if (!overlay_events_enabled) | |||
812 | { | |||
813 | /* Yes -- overlay event support is not active, | |||
814 | so we must try to set a breakpoint at the LMA. | |||
815 | This will not work for a hardware breakpoint. */ | |||
816 | if (bpt->loc_type == bp_loc_hardware_breakpoint) | |||
817 | warning ("hardware breakpoint %d not supported in overlay!\n", | |||
818 | bpt->owner->number); | |||
819 | else | |||
820 | { | |||
821 | CORE_ADDR addr = overlay_unmapped_address (bpt->address, | |||
822 | bpt->section); | |||
823 | /* Set a software (trap) breakpoint at the LMA. */ | |||
824 | val = target_insert_breakpoint (addr, bpt->shadow_contents)(*current_target.to_insert_breakpoint) (addr, bpt->shadow_contents ); | |||
825 | if (val != 0) | |||
826 | fprintf_unfiltered (tmp_error_stream, | |||
827 | "Overlay breakpoint %d failed: in ROM?", | |||
828 | bpt->owner->number); | |||
829 | } | |||
830 | } | |||
831 | /* Shall we set a breakpoint at the VMA? */ | |||
832 | if (section_is_mapped (bpt->section)) | |||
833 | { | |||
834 | /* Yes. This overlay section is mapped into memory. */ | |||
835 | if (bpt->loc_type == bp_loc_hardware_breakpoint) | |||
836 | val = target_insert_hw_breakpoint (bpt->address,(*current_target.to_insert_hw_breakpoint) (bpt->address, bpt ->shadow_contents) | |||
837 | bpt->shadow_contents)(*current_target.to_insert_hw_breakpoint) (bpt->address, bpt ->shadow_contents); | |||
838 | else | |||
839 | val = target_insert_breakpoint (bpt->address,(*current_target.to_insert_breakpoint) (bpt->address, bpt-> shadow_contents) | |||
840 | bpt->shadow_contents)(*current_target.to_insert_breakpoint) (bpt->address, bpt-> shadow_contents); | |||
841 | } | |||
842 | else | |||
843 | { | |||
844 | /* No. This breakpoint will not be inserted. | |||
845 | No error, but do not mark the bp as 'inserted'. */ | |||
846 | return 0; | |||
847 | } | |||
848 | } | |||
849 | ||||
850 | if (val) | |||
851 | { | |||
852 | /* Can't set the breakpoint. */ | |||
853 | #if defined (DISABLE_UNSETTABLE_BREAK) | |||
854 | if (DISABLE_UNSETTABLE_BREAK (bpt->address)(solib_address(bpt->address) != ((void*)0))) | |||
855 | { | |||
856 | /* See also: disable_breakpoints_in_shlibs. */ | |||
857 | val = 0; | |||
858 | bpt->owner->enable_state = bp_shlib_disabled; | |||
859 | if (!*disabled_breaks) | |||
860 | { | |||
861 | fprintf_unfiltered (tmp_error_stream, | |||
862 | "Cannot insert breakpoint %d.\n", | |||
863 | bpt->owner->number); | |||
864 | fprintf_unfiltered (tmp_error_stream, | |||
865 | "Temporarily disabling shared library breakpoints:\n"); | |||
866 | } | |||
867 | *disabled_breaks = 1; | |||
868 | fprintf_unfiltered (tmp_error_stream, | |||
869 | "breakpoint #%d\n", bpt->owner->number); | |||
870 | } | |||
871 | else | |||
872 | #endif | |||
873 | { | |||
874 | #ifdef ONE_PROCESS_WRITETEXT | |||
875 | *process_warning = 1; | |||
876 | #endif | |||
877 | if (bpt->loc_type == bp_loc_hardware_breakpoint) | |||
878 | { | |||
879 | *hw_breakpoint_error = 1; | |||
880 | fprintf_unfiltered (tmp_error_stream, | |||
881 | "Cannot insert hardware breakpoint %d.\n", | |||
882 | bpt->owner->number); | |||
883 | } | |||
884 | else | |||
885 | { | |||
886 | fprintf_unfiltered (tmp_error_stream, | |||
887 | "Cannot insert breakpoint %d.\n", | |||
888 | bpt->owner->number); | |||
889 | fprintf_filtered (tmp_error_stream, | |||
890 | "Error accessing memory address "); | |||
891 | print_address_numeric (bpt->address, 1, tmp_error_stream); | |||
892 | fprintf_filtered (tmp_error_stream, ": %s.\n", | |||
893 | safe_strerror (val)); | |||
894 | } | |||
895 | ||||
896 | } | |||
897 | } | |||
898 | else | |||
899 | bpt->inserted = 1; | |||
900 | ||||
901 | return val; | |||
902 | } | |||
903 | ||||
904 | else if (bpt->loc_type == bp_loc_hardware_watchpoint | |||
905 | /* NOTE drow/2003-09-08: This state only exists for removing | |||
906 | watchpoints. It's not clear that it's necessary... */ | |||
907 | && bpt->owner->disposition != disp_del_at_next_stop) | |||
908 | { | |||
909 | /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints | |||
910 | based on the expression. Ideally this should happen at a higher level, | |||
911 | and there should be one bp_location for each computed address we | |||
912 | must watch. As soon as a many-to-one mapping is available I'll | |||
913 | convert this. */ | |||
914 | ||||
915 | int within_current_scope; | |||
916 | struct value *mark = value_mark (); | |||
917 | struct value *v; | |||
918 | struct frame_id saved_frame_id; | |||
919 | ||||
920 | /* Save the current frame's ID so we can restore it after | |||
921 | evaluating the watchpoint expression on its own frame. */ | |||
922 | /* FIXME drow/2003-09-09: It would be nice if evaluate_expression | |||
923 | took a frame parameter, so that we didn't have to change the | |||
924 | selected frame. */ | |||
925 | saved_frame_id = get_frame_id (deprecated_selected_frame); | |||
926 | ||||
927 | /* Determine if the watchpoint is within scope. */ | |||
928 | if (bpt->owner->exp_valid_block == NULL((void*)0)) | |||
929 | within_current_scope = 1; | |||
930 | else | |||
931 | { | |||
932 | struct frame_info *fi; | |||
933 | fi = frame_find_by_id (bpt->owner->watchpoint_frame); | |||
934 | within_current_scope = (fi != NULL((void*)0)); | |||
935 | if (within_current_scope) | |||
936 | select_frame (fi); | |||
937 | } | |||
938 | ||||
939 | if (within_current_scope) | |||
940 | { | |||
941 | free_valchain (bpt); | |||
942 | ||||
943 | /* Evaluate the expression and cut the chain of values | |||
944 | produced off from the value chain. | |||
945 | ||||
946 | Make sure the value returned isn't lazy; we use | |||
947 | laziness to determine what memory GDB actually needed | |||
948 | in order to compute the value of the expression. */ | |||
949 | v = evaluate_expression (bpt->owner->exp); | |||
950 | VALUE_CONTENTS (v)((void)((v)->lazy && value_fetch_lazy(v)), ((char * ) (v)->aligner.contents + (v)->embedded_offset)); | |||
951 | value_release_to_mark (mark); | |||
952 | ||||
953 | bpt->owner->val_chain = v; | |||
954 | bpt->inserted = 1; | |||
955 | ||||
956 | /* Look at each value on the value chain. */ | |||
957 | for (; v; v = v->next) | |||
958 | { | |||
959 | /* If it's a memory location, and GDB actually needed | |||
960 | its contents to evaluate the expression, then we | |||
961 | must watch it. */ | |||
962 | if (VALUE_LVAL (v)(v)->lval == lval_memory | |||
963 | && ! VALUE_LAZY (v)(v)->lazy) | |||
964 | { | |||
965 | struct type *vtype = check_typedef (VALUE_TYPE (v)(v)->type); | |||
966 | ||||
967 | /* We only watch structs and arrays if user asked | |||
968 | for it explicitly, never if they just happen to | |||
969 | appear in the middle of some value chain. */ | |||
970 | if (v == bpt->owner->val_chain | |||
971 | || (TYPE_CODE (vtype)(vtype)->main_type->code != TYPE_CODE_STRUCT | |||
972 | && TYPE_CODE (vtype)(vtype)->main_type->code != TYPE_CODE_ARRAY)) | |||
973 | { | |||
974 | CORE_ADDR addr; | |||
975 | int len, type; | |||
976 | ||||
977 | addr = VALUE_ADDRESS (v)(v)->location.address + VALUE_OFFSET (v)(v)->offset; | |||
978 | len = TYPE_LENGTH (VALUE_TYPE (v))((v)->type)->length; | |||
979 | type = hw_write; | |||
980 | if (bpt->owner->type == bp_read_watchpoint) | |||
981 | type = hw_read; | |||
982 | else if (bpt->owner->type == bp_access_watchpoint) | |||
983 | type = hw_access; | |||
984 | ||||
985 | val = target_insert_watchpoint (addr, len, type)(*current_target.to_insert_watchpoint) (addr, len, type); | |||
986 | if (val == -1) | |||
987 | { | |||
988 | /* Don't exit the loop, try to insert | |||
989 | every value on the value chain. That's | |||
990 | because we will be removing all the | |||
991 | watches below, and removing a | |||
992 | watchpoint we didn't insert could have | |||
993 | adverse effects. */ | |||
994 | bpt->inserted = 0; | |||
995 | } | |||
996 | val = 0; | |||
997 | } | |||
998 | } | |||
999 | } | |||
1000 | /* Failure to insert a watchpoint on any memory value in the | |||
1001 | value chain brings us here. */ | |||
1002 | if (!bpt->inserted) | |||
1003 | { | |||
1004 | remove_breakpoint (bpt, mark_uninserted); | |||
1005 | *hw_breakpoint_error = 1; | |||
1006 | fprintf_unfiltered (tmp_error_stream, | |||
1007 | "Could not insert hardware watchpoint %d.\n", | |||
1008 | bpt->owner->number); | |||
1009 | val = -1; | |||
1010 | } | |||
1011 | } | |||
1012 | else | |||
1013 | { | |||
1014 | printf_filtered ("Hardware watchpoint %d deleted ", bpt->owner->number); | |||
1015 | printf_filtered ("because the program has left the block \n"); | |||
1016 | printf_filtered ("in which its expression is valid.\n"); | |||
1017 | if (bpt->owner->related_breakpoint) | |||
1018 | bpt->owner->related_breakpoint->disposition = disp_del_at_next_stop; | |||
1019 | bpt->owner->disposition = disp_del_at_next_stop; | |||
1020 | } | |||
1021 | ||||
1022 | /* Restore the selected frame. */ | |||
1023 | select_frame (frame_find_by_id (saved_frame_id)); | |||
1024 | ||||
1025 | return val; | |||
1026 | } | |||
1027 | ||||
1028 | else if (ep_is_exception_catchpoint (bpt->owner)) | |||
1029 | { | |||
1030 | /* FIXME drow/2003-09-09: This code sets both a catchpoint and a | |||
1031 | breakpoint. Once again, it would be better if this was represented | |||
1032 | as two bp_locations. */ | |||
1033 | ||||
1034 | /* If we get here, we must have a callback mechanism for exception | |||
1035 | events -- with g++ style embedded label support, we insert | |||
1036 | ordinary breakpoints and not catchpoints. */ | |||
1037 | val = target_insert_breakpoint (bpt->address, bpt->shadow_contents)(*current_target.to_insert_breakpoint) (bpt->address, bpt-> shadow_contents); | |||
1038 | if (val) | |||
1039 | { | |||
1040 | /* Couldn't set breakpoint for some reason */ | |||
1041 | fprintf_unfiltered (tmp_error_stream, | |||
1042 | "Cannot insert catchpoint %d; disabling it.\n", | |||
1043 | bpt->owner->number); | |||
1044 | fprintf_filtered (tmp_error_stream, | |||
1045 | "Error accessing memory address "); | |||
1046 | print_address_numeric (bpt->address, 1, tmp_error_stream); | |||
1047 | fprintf_filtered (tmp_error_stream, ": %s.\n", | |||
1048 | safe_strerror (val)); | |||
1049 | bpt->owner->enable_state = bp_disabled; | |||
1050 | } | |||
1051 | else | |||
1052 | { | |||
1053 | /* Bp set, now make sure callbacks are enabled */ | |||
1054 | /* Format possible error msg */ | |||
1055 | char *message = xstrprintf ("Error inserting catchpoint %d:\n", | |||
1056 | bpt->owner->number); | |||
1057 | struct cleanup *cleanups = make_cleanup (xfree, message); | |||
1058 | int val; | |||
1059 | args_for_catchpoint_enable args; | |||
1060 | args.kind = bpt->owner->type == bp_catch_catch ? | |||
1061 | EX_EVENT_CATCH : EX_EVENT_THROW; | |||
1062 | args.enable_p = 1; | |||
1063 | val = catch_errors (cover_target_enable_exception_callback, | |||
1064 | &args, message, RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
1065 | do_cleanups (cleanups); | |||
1066 | if (val != 0 && val != -1) | |||
1067 | bpt->inserted = 1; | |||
1068 | ||||
1069 | /* Check if something went wrong; val == 0 can be ignored */ | |||
1070 | if (val == -1) | |||
1071 | { | |||
1072 | /* something went wrong */ | |||
1073 | fprintf_unfiltered (tmp_error_stream, | |||
1074 | "Cannot insert catchpoint %d; disabling it.\n", | |||
1075 | bpt->owner->number); | |||
1076 | bpt->owner->enable_state = bp_disabled; | |||
1077 | } | |||
1078 | } | |||
1079 | ||||
1080 | return val; | |||
1081 | } | |||
1082 | ||||
1083 | else if (bpt->owner->type == bp_catch_fork | |||
1084 | || bpt->owner->type == bp_catch_vfork | |||
1085 | || bpt->owner->type == bp_catch_exec) | |||
1086 | { | |||
1087 | char *prefix = xstrprintf ("warning: inserting catchpoint %d: ", | |||
1088 | bpt->owner->number); | |||
1089 | struct cleanup *cleanups = make_cleanup (xfree, prefix); | |||
1090 | val = catch_exceptions (uiout, insert_catchpoint, bpt->owner, prefix, | |||
1091 | RETURN_MASK_ERROR(1 << (int)(-RETURN_ERROR))); | |||
1092 | do_cleanups (cleanups); | |||
1093 | if (val < 0) | |||
1094 | bpt->owner->enable_state = bp_disabled; | |||
1095 | else | |||
1096 | bpt->inserted = 1; | |||
1097 | ||||
1098 | /* We've already printed an error message if there was a problem | |||
1099 | inserting this catchpoint, and we've disabled the catchpoint, | |||
1100 | so just return success. */ | |||
1101 | return 0; | |||
1102 | } | |||
1103 | ||||
1104 | return 0; | |||
1105 | } | |||
1106 | ||||
1107 | /* insert_breakpoints is used when starting or continuing the program. | |||
1108 | remove_breakpoints is used when the program stops. | |||
1109 | Both return zero if successful, | |||
1110 | or an `errno' value if could not write the inferior. */ | |||
1111 | ||||
1112 | int | |||
1113 | insert_breakpoints (void) | |||
1114 | { | |||
1115 | struct bp_location *b, *temp; | |||
1116 | int return_val = 0; /* return success code. */ | |||
1117 | int val = 0; | |||
1118 | int disabled_breaks = 0; | |||
1119 | int hw_breakpoint_error = 0; | |||
1120 | int process_warning = 0; | |||
1121 | ||||
1122 | struct ui_file *tmp_error_stream = mem_fileopen (); | |||
1123 | make_cleanup_ui_file_delete (tmp_error_stream); | |||
1124 | ||||
1125 | /* Explicitly mark the warning -- this will only be printed if | |||
1126 | there was an error. */ | |||
1127 | fprintf_unfiltered (tmp_error_stream, "Warning:\n"); | |||
1128 | ||||
1129 | ALL_BP_LOCATIONS_SAFE (b, temp)for (b = bp_location_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
1130 | { | |||
1131 | /* Permanent breakpoints cannot be inserted or removed. Disabled | |||
1132 | breakpoints should not be inserted. */ | |||
1133 | if (!breakpoint_enabled (b->owner)) | |||
1134 | continue; | |||
1135 | ||||
1136 | /* FIXME drow/2003-10-07: This code should be pushed elsewhere when | |||
1137 | hardware watchpoints are split into multiple loc breakpoints. */ | |||
1138 | if ((b->loc_type == bp_loc_hardware_watchpoint | |||
1139 | || b->owner->type == bp_watchpoint) && !b->owner->val) | |||
1140 | { | |||
1141 | struct value *val; | |||
1142 | val = evaluate_expression (b->owner->exp); | |||
1143 | release_value (val); | |||
1144 | if (VALUE_LAZY (val)(val)->lazy) | |||
1145 | value_fetch_lazy (val); | |||
1146 | b->owner->val = val; | |||
1147 | } | |||
1148 | ||||
1149 | val = insert_bp_location (b, tmp_error_stream, | |||
1150 | &disabled_breaks, &process_warning, | |||
1151 | &hw_breakpoint_error); | |||
1152 | if (val) | |||
1153 | return_val = val; | |||
1154 | } | |||
1155 | ||||
1156 | if (return_val) | |||
1157 | { | |||
1158 | /* If a hardware breakpoint or watchpoint was inserted, add a | |||
1159 | message about possibly exhausted resources. */ | |||
1160 | if (hw_breakpoint_error) | |||
1161 | { | |||
1162 | fprintf_unfiltered (tmp_error_stream, | |||
1163 | "Could not insert hardware breakpoints:\n\ | |||
1164 | You may have requested too many hardware breakpoints/watchpoints.\n"); | |||
1165 | } | |||
1166 | #ifdef ONE_PROCESS_WRITETEXT | |||
1167 | if (process_warning) | |||
1168 | fprintf_unfiltered (tmp_error_stream, | |||
1169 | "The same program may be running in another process."); | |||
1170 | #endif | |||
1171 | target_terminal_ours_for_output ()(*current_target.to_terminal_ours_for_output) (); | |||
1172 | error_stream (tmp_error_stream); | |||
1173 | } | |||
1174 | return return_val; | |||
1175 | } | |||
1176 | ||||
1177 | int | |||
1178 | remove_breakpoints (void) | |||
1179 | { | |||
1180 | struct bp_location *b; | |||
1181 | int val; | |||
1182 | ||||
1183 | ALL_BP_LOCATIONS (b)for (b = bp_location_chain; b; b = b->next) | |||
1184 | { | |||
1185 | if (b->inserted) | |||
1186 | { | |||
1187 | val = remove_breakpoint (b, mark_uninserted); | |||
1188 | if (val != 0) | |||
1189 | return val; | |||
1190 | } | |||
1191 | } | |||
1192 | return 0; | |||
1193 | } | |||
1194 | ||||
1195 | int | |||
1196 | remove_hw_watchpoints (void) | |||
1197 | { | |||
1198 | struct bp_location *b; | |||
1199 | int val; | |||
1200 | ||||
1201 | ALL_BP_LOCATIONS (b)for (b = bp_location_chain; b; b = b->next) | |||
1202 | { | |||
1203 | if (b->inserted && b->loc_type == bp_loc_hardware_watchpoint) | |||
1204 | { | |||
1205 | val = remove_breakpoint (b, mark_uninserted); | |||
1206 | if (val != 0) | |||
1207 | return val; | |||
1208 | } | |||
1209 | } | |||
1210 | return 0; | |||
1211 | } | |||
1212 | ||||
1213 | int | |||
1214 | reattach_breakpoints (int pid) | |||
1215 | { | |||
1216 | struct bp_location *b; | |||
1217 | int val; | |||
1218 | struct cleanup *old_chain = save_inferior_ptid (); | |||
1219 | ||||
1220 | /* Set inferior_ptid; remove_breakpoint uses this global. */ | |||
1221 | inferior_ptid = pid_to_ptid (pid); | |||
1222 | ALL_BP_LOCATIONS (b)for (b = bp_location_chain; b; b = b->next) | |||
1223 | { | |||
1224 | if (b->inserted) | |||
1225 | { | |||
1226 | remove_breakpoint (b, mark_inserted); | |||
1227 | if (b->loc_type == bp_loc_hardware_breakpoint) | |||
1228 | val = target_insert_hw_breakpoint (b->address, b->shadow_contents)(*current_target.to_insert_hw_breakpoint) (b->address, b-> shadow_contents); | |||
1229 | else | |||
1230 | val = target_insert_breakpoint (b->address, b->shadow_contents)(*current_target.to_insert_breakpoint) (b->address, b-> shadow_contents); | |||
1231 | /* FIXME drow/2003-10-07: This doesn't handle any other kinds of | |||
1232 | breakpoints. It's wrong for watchpoints, for example. */ | |||
1233 | if (val != 0) | |||
1234 | { | |||
1235 | do_cleanups (old_chain); | |||
1236 | return val; | |||
1237 | } | |||
1238 | } | |||
1239 | } | |||
1240 | do_cleanups (old_chain); | |||
1241 | return 0; | |||
1242 | } | |||
1243 | ||||
1244 | void | |||
1245 | update_breakpoints_after_exec (void) | |||
1246 | { | |||
1247 | struct breakpoint *b; | |||
1248 | struct breakpoint *temp; | |||
1249 | ||||
1250 | /* Doing this first prevents the badness of having delete_breakpoint() | |||
1251 | write a breakpoint's current "shadow contents" to lift the bp. That | |||
1252 | shadow is NOT valid after an exec()! */ | |||
1253 | mark_breakpoints_out (); | |||
1254 | ||||
1255 | ALL_BREAKPOINTS_SAFE (b, temp)for (b = breakpoint_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
1256 | { | |||
1257 | /* Solib breakpoints must be explicitly reset after an exec(). */ | |||
1258 | if (b->type == bp_shlib_event) | |||
1259 | { | |||
1260 | delete_breakpoint (b); | |||
1261 | continue; | |||
1262 | } | |||
1263 | ||||
1264 | /* Thread event breakpoints must be set anew after an exec(), | |||
1265 | as must overlay event breakpoints. */ | |||
1266 | if (b->type == bp_thread_event || b->type == bp_overlay_event) | |||
1267 | { | |||
1268 | delete_breakpoint (b); | |||
1269 | continue; | |||
1270 | } | |||
1271 | ||||
1272 | /* Step-resume breakpoints are meaningless after an exec(). */ | |||
1273 | if (b->type == bp_step_resume) | |||
1274 | { | |||
1275 | delete_breakpoint (b); | |||
1276 | continue; | |||
1277 | } | |||
1278 | ||||
1279 | /* Ditto the sigtramp handler breakpoints. */ | |||
1280 | if (b->type == bp_through_sigtramp) | |||
1281 | { | |||
1282 | delete_breakpoint (b); | |||
1283 | continue; | |||
1284 | } | |||
1285 | ||||
1286 | /* Ditto the exception-handling catchpoints. */ | |||
1287 | if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw)) | |||
1288 | { | |||
1289 | delete_breakpoint (b); | |||
1290 | continue; | |||
1291 | } | |||
1292 | ||||
1293 | /* Don't delete an exec catchpoint, because else the inferior | |||
1294 | won't stop when it ought! | |||
1295 | ||||
1296 | Similarly, we probably ought to keep vfork catchpoints, 'cause | |||
1297 | on this target, we may not be able to stop when the vfork is | |||
1298 | seen, but only when the subsequent exec is seen. (And because | |||
1299 | deleting fork catchpoints here but not vfork catchpoints will | |||
1300 | seem mysterious to users, keep those too.) | |||
1301 | ||||
1302 | ??rehrauer: Let's hope that merely clearing out this catchpoint's | |||
1303 | target address field, if any, is sufficient to have it be reset | |||
1304 | automagically. Certainly on HP-UX that's true. | |||
1305 | ||||
1306 | Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly | |||
1307 | valid code address on some platforms (like the mn10300 | |||
1308 | simulators). We shouldn't assign any special interpretation to | |||
1309 | a breakpoint with a zero address. And in fact, GDB doesn't --- | |||
1310 | I can't see what that comment above is talking about. As far | |||
1311 | as I can tell, setting the address of a | |||
1312 | bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero | |||
1313 | is meaningless, since those are implemented with HP-UX kernel | |||
1314 | hackery, not by storing breakpoint instructions somewhere. */ | |||
1315 | if ((b->type == bp_catch_exec) || | |||
1316 | (b->type == bp_catch_vfork) || | |||
1317 | (b->type == bp_catch_fork)) | |||
1318 | { | |||
1319 | b->loc->address = (CORE_ADDR) NULL((void*)0); | |||
1320 | continue; | |||
1321 | } | |||
1322 | ||||
1323 | /* bp_finish is a special case. The only way we ought to be able | |||
1324 | to see one of these when an exec() has happened, is if the user | |||
1325 | caught a vfork, and then said "finish". Ordinarily a finish just | |||
1326 | carries them to the call-site of the current callee, by setting | |||
1327 | a temporary bp there and resuming. But in this case, the finish | |||
1328 | will carry them entirely through the vfork & exec. | |||
1329 | ||||
1330 | We don't want to allow a bp_finish to remain inserted now. But | |||
1331 | we can't safely delete it, 'cause finish_command has a handle to | |||
1332 | the bp on a bpstat, and will later want to delete it. There's a | |||
1333 | chance (and I've seen it happen) that if we delete the bp_finish | |||
1334 | here, that its storage will get reused by the time finish_command | |||
1335 | gets 'round to deleting the "use to be a bp_finish" breakpoint. | |||
1336 | We really must allow finish_command to delete a bp_finish. | |||
1337 | ||||
1338 | In the absense of a general solution for the "how do we know | |||
1339 | it's safe to delete something others may have handles to?" | |||
1340 | problem, what we'll do here is just uninsert the bp_finish, and | |||
1341 | let finish_command delete it. | |||
1342 | ||||
1343 | (We know the bp_finish is "doomed" in the sense that it's | |||
1344 | momentary, and will be deleted as soon as finish_command sees | |||
1345 | the inferior stopped. So it doesn't matter that the bp's | |||
1346 | address is probably bogus in the new a.out, unlike e.g., the | |||
1347 | solib breakpoints.) */ | |||
1348 | ||||
1349 | if (b->type == bp_finish) | |||
1350 | { | |||
1351 | continue; | |||
1352 | } | |||
1353 | ||||
1354 | /* Without a symbolic address, we have little hope of the | |||
1355 | pre-exec() address meaning the same thing in the post-exec() | |||
1356 | a.out. */ | |||
1357 | if (b->addr_string == NULL((void*)0)) | |||
1358 | { | |||
1359 | delete_breakpoint (b); | |||
1360 | continue; | |||
1361 | } | |||
1362 | ||||
1363 | /* If this breakpoint has survived the above battery of checks, then | |||
1364 | it must have a symbolic address. Be sure that it gets reevaluated | |||
1365 | to a target address, rather than reusing the old evaluation. | |||
1366 | ||||
1367 | Jim Blandy <jimb@redhat.com>: As explained above in the comment | |||
1368 | for bp_catch_exec and friends, I'm pretty sure this is entirely | |||
1369 | unnecessary. A call to breakpoint_re_set_one always recomputes | |||
1370 | the breakpoint's address from scratch, or deletes it if it can't. | |||
1371 | So I think this assignment could be deleted without effect. */ | |||
1372 | b->loc->address = (CORE_ADDR) NULL((void*)0); | |||
1373 | } | |||
1374 | /* FIXME what about longjmp breakpoints? Re-create them here? */ | |||
1375 | create_overlay_event_breakpoint ("_ovly_debug_event"); | |||
1376 | } | |||
1377 | ||||
1378 | int | |||
1379 | detach_breakpoints (int pid) | |||
1380 | { | |||
1381 | struct bp_location *b; | |||
1382 | int val; | |||
1383 | struct cleanup *old_chain = save_inferior_ptid (); | |||
1384 | ||||
1385 | if (pid == PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid))) | |||
1386 | error ("Cannot detach breakpoints of inferior_ptid"); | |||
1387 | ||||
1388 | /* Set inferior_ptid; remove_breakpoint uses this global. */ | |||
1389 | inferior_ptid = pid_to_ptid (pid); | |||
1390 | ALL_BP_LOCATIONS (b)for (b = bp_location_chain; b; b = b->next) | |||
1391 | { | |||
1392 | if (b->inserted) | |||
1393 | { | |||
1394 | val = remove_breakpoint (b, mark_inserted); | |||
1395 | if (val != 0) | |||
1396 | { | |||
1397 | do_cleanups (old_chain); | |||
1398 | return val; | |||
1399 | } | |||
1400 | } | |||
1401 | } | |||
1402 | do_cleanups (old_chain); | |||
1403 | return 0; | |||
1404 | } | |||
1405 | ||||
1406 | static int | |||
1407 | remove_breakpoint (struct bp_location *b, insertion_state_t is) | |||
1408 | { | |||
1409 | int val; | |||
1410 | ||||
1411 | if (b->owner->enable_state == bp_permanent) | |||
1412 | /* Permanent breakpoints cannot be inserted or removed. */ | |||
1413 | return 0; | |||
1414 | ||||
1415 | if (b->owner->type == bp_none) | |||
1416 | warning ("attempted to remove apparently deleted breakpoint #%d?", | |||
1417 | b->owner->number); | |||
1418 | ||||
1419 | if (b->loc_type == bp_loc_software_breakpoint | |||
1420 | || b->loc_type == bp_loc_hardware_breakpoint) | |||
1421 | { | |||
1422 | /* "Normal" instruction breakpoint: either the standard | |||
1423 | trap-instruction bp (bp_breakpoint), or a | |||
1424 | bp_hardware_breakpoint. */ | |||
1425 | ||||
1426 | /* First check to see if we have to handle an overlay. */ | |||
1427 | if (overlay_debugging == ovly_off | |||
1428 | || b->section == NULL((void*)0) | |||
1429 | || !(section_is_overlay (b->section))) | |||
1430 | { | |||
1431 | /* No overlay handling: just remove the breakpoint. */ | |||
1432 | ||||
1433 | if (b->loc_type == bp_loc_hardware_breakpoint) | |||
1434 | val = target_remove_hw_breakpoint (b->address,(*current_target.to_remove_hw_breakpoint) (b->address, b-> shadow_contents) | |||
1435 | b->shadow_contents)(*current_target.to_remove_hw_breakpoint) (b->address, b-> shadow_contents); | |||
1436 | else | |||
1437 | val = target_remove_breakpoint (b->address, b->shadow_contents)(*current_target.to_remove_breakpoint) (b->address, b-> shadow_contents); | |||
1438 | } | |||
1439 | else | |||
1440 | { | |||
1441 | /* This breakpoint is in an overlay section. | |||
1442 | Did we set a breakpoint at the LMA? */ | |||
1443 | if (!overlay_events_enabled) | |||
1444 | { | |||
1445 | /* Yes -- overlay event support is not active, so we | |||
1446 | should have set a breakpoint at the LMA. Remove it. | |||
1447 | */ | |||
1448 | CORE_ADDR addr = overlay_unmapped_address (b->address, | |||
1449 | b->section); | |||
1450 | /* Ignore any failures: if the LMA is in ROM, we will | |||
1451 | have already warned when we failed to insert it. */ | |||
1452 | if (b->loc_type == bp_loc_hardware_breakpoint) | |||
1453 | target_remove_hw_breakpoint (addr, b->shadow_contents)(*current_target.to_remove_hw_breakpoint) (addr, b->shadow_contents ); | |||
1454 | else | |||
1455 | target_remove_breakpoint (addr, b->shadow_contents)(*current_target.to_remove_breakpoint) (addr, b->shadow_contents ); | |||
1456 | } | |||
1457 | /* Did we set a breakpoint at the VMA? | |||
1458 | If so, we will have marked the breakpoint 'inserted'. */ | |||
1459 | if (b->inserted) | |||
1460 | { | |||
1461 | /* Yes -- remove it. Previously we did not bother to | |||
1462 | remove the breakpoint if the section had been | |||
1463 | unmapped, but let's not rely on that being safe. We | |||
1464 | don't know what the overlay manager might do. */ | |||
1465 | if (b->loc_type == bp_loc_hardware_breakpoint) | |||
1466 | val = target_remove_hw_breakpoint (b->address,(*current_target.to_remove_hw_breakpoint) (b->address, b-> shadow_contents) | |||
1467 | b->shadow_contents)(*current_target.to_remove_hw_breakpoint) (b->address, b-> shadow_contents); | |||
1468 | else | |||
1469 | val = target_remove_breakpoint (b->address,(*current_target.to_remove_breakpoint) (b->address, b-> shadow_contents) | |||
1470 | b->shadow_contents)(*current_target.to_remove_breakpoint) (b->address, b-> shadow_contents); | |||
1471 | } | |||
1472 | else | |||
1473 | { | |||
1474 | /* No -- not inserted, so no need to remove. No error. */ | |||
1475 | val = 0; | |||
1476 | } | |||
1477 | } | |||
1478 | if (val) | |||
1479 | return val; | |||
1480 | b->inserted = (is == mark_inserted); | |||
1481 | } | |||
1482 | else if (b->loc_type == bp_loc_hardware_watchpoint | |||
1483 | && breakpoint_enabled (b->owner) | |||
1484 | && !b->duplicate) | |||
1485 | { | |||
1486 | struct value *v; | |||
1487 | struct value *n; | |||
1488 | ||||
1489 | b->inserted = (is == mark_inserted); | |||
1490 | /* Walk down the saved value chain. */ | |||
1491 | for (v = b->owner->val_chain; v; v = v->next) | |||
1492 | { | |||
1493 | /* For each memory reference remove the watchpoint | |||
1494 | at that address. */ | |||
1495 | if (VALUE_LVAL (v)(v)->lval == lval_memory | |||
1496 | && ! VALUE_LAZY (v)(v)->lazy) | |||
1497 | { | |||
1498 | struct type *vtype = check_typedef (VALUE_TYPE (v)(v)->type); | |||
1499 | ||||
1500 | if (v == b->owner->val_chain | |||
1501 | || (TYPE_CODE (vtype)(vtype)->main_type->code != TYPE_CODE_STRUCT | |||
1502 | && TYPE_CODE (vtype)(vtype)->main_type->code != TYPE_CODE_ARRAY)) | |||
1503 | { | |||
1504 | CORE_ADDR addr; | |||
1505 | int len, type; | |||
1506 | ||||
1507 | addr = VALUE_ADDRESS (v)(v)->location.address + VALUE_OFFSET (v)(v)->offset; | |||
1508 | len = TYPE_LENGTH (VALUE_TYPE (v))((v)->type)->length; | |||
1509 | type = hw_write; | |||
1510 | if (b->owner->type == bp_read_watchpoint) | |||
1511 | type = hw_read; | |||
1512 | else if (b->owner->type == bp_access_watchpoint) | |||
1513 | type = hw_access; | |||
1514 | ||||
1515 | val = target_remove_watchpoint (addr, len, type)(*current_target.to_remove_watchpoint) (addr, len, type); | |||
1516 | if (val == -1) | |||
1517 | b->inserted = 1; | |||
1518 | val = 0; | |||
1519 | } | |||
1520 | } | |||
1521 | } | |||
1522 | /* Failure to remove any of the hardware watchpoints comes here. */ | |||
1523 | if ((is == mark_uninserted) && (b->inserted)) | |||
1524 | warning ("Could not remove hardware watchpoint %d.", | |||
1525 | b->owner->number); | |||
1526 | } | |||
1527 | else if ((b->owner->type == bp_catch_fork || | |||
1528 | b->owner->type == bp_catch_vfork || | |||
1529 | b->owner->type == bp_catch_exec) | |||
1530 | && breakpoint_enabled (b->owner) | |||
1531 | && !b->duplicate) | |||
1532 | { | |||
1533 | val = -1; | |||
1534 | switch (b->owner->type) | |||
1535 | { | |||
1536 | case bp_catch_fork: | |||
1537 | val = target_remove_fork_catchpoint (PIDGET (inferior_ptid))(*current_target.to_remove_fork_catchpoint) ((ptid_get_pid (inferior_ptid ))); | |||
1538 | break; | |||
1539 | case bp_catch_vfork: | |||
1540 | val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid))(*current_target.to_remove_vfork_catchpoint) ((ptid_get_pid ( inferior_ptid))); | |||
1541 | break; | |||
1542 | case bp_catch_exec: | |||
1543 | val = target_remove_exec_catchpoint (PIDGET (inferior_ptid))(*current_target.to_remove_exec_catchpoint) ((ptid_get_pid (inferior_ptid ))); | |||
1544 | break; | |||
1545 | default: | |||
1546 | warning ("Internal error, %s line %d.", __FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__1546); | |||
1547 | break; | |||
1548 | } | |||
1549 | if (val) | |||
1550 | return val; | |||
1551 | b->inserted = (is == mark_inserted); | |||
1552 | } | |||
1553 | else if ((b->owner->type == bp_catch_catch || | |||
1554 | b->owner->type == bp_catch_throw) | |||
1555 | && breakpoint_enabled (b->owner) | |||
1556 | && !b->duplicate) | |||
1557 | { | |||
1558 | ||||
1559 | val = target_remove_breakpoint (b->address, b->shadow_contents)(*current_target.to_remove_breakpoint) (b->address, b-> shadow_contents); | |||
1560 | if (val) | |||
1561 | return val; | |||
1562 | b->inserted = (is == mark_inserted); | |||
1563 | } | |||
1564 | else if (ep_is_exception_catchpoint (b->owner) | |||
1565 | && b->inserted /* sometimes previous insert doesn't happen */ | |||
1566 | && breakpoint_enabled (b->owner) | |||
1567 | && !b->duplicate) | |||
1568 | { | |||
1569 | ||||
1570 | val = target_remove_breakpoint (b->address, b->shadow_contents)(*current_target.to_remove_breakpoint) (b->address, b-> shadow_contents); | |||
1571 | if (val) | |||
1572 | return val; | |||
1573 | ||||
1574 | b->inserted = (is == mark_inserted); | |||
1575 | } | |||
1576 | ||||
1577 | return 0; | |||
1578 | } | |||
1579 | ||||
1580 | /* Clear the "inserted" flag in all breakpoints. */ | |||
1581 | ||||
1582 | void | |||
1583 | mark_breakpoints_out (void) | |||
1584 | { | |||
1585 | struct bp_location *bpt; | |||
1586 | ||||
1587 | ALL_BP_LOCATIONS (bpt)for (bpt = bp_location_chain; bpt; bpt = bpt->next) | |||
1588 | bpt->inserted = 0; | |||
1589 | } | |||
1590 | ||||
1591 | /* Clear the "inserted" flag in all breakpoints and delete any | |||
1592 | breakpoints which should go away between runs of the program. | |||
1593 | ||||
1594 | Plus other such housekeeping that has to be done for breakpoints | |||
1595 | between runs. | |||
1596 | ||||
1597 | Note: this function gets called at the end of a run (by | |||
1598 | generic_mourn_inferior) and when a run begins (by | |||
1599 | init_wait_for_inferior). */ | |||
1600 | ||||
1601 | ||||
1602 | ||||
1603 | void | |||
1604 | breakpoint_init_inferior (enum inf_context context) | |||
1605 | { | |||
1606 | struct breakpoint *b, *temp; | |||
1607 | struct bp_location *bpt; | |||
1608 | static int warning_needed = 0; | |||
1609 | ||||
1610 | ALL_BP_LOCATIONS (bpt)for (bpt = bp_location_chain; bpt; bpt = bpt->next) | |||
1611 | bpt->inserted = 0; | |||
1612 | ||||
1613 | ALL_BREAKPOINTS_SAFE (b, temp)for (b = breakpoint_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
1614 | { | |||
1615 | switch (b->type) | |||
1616 | { | |||
1617 | case bp_call_dummy: | |||
1618 | case bp_watchpoint_scope: | |||
1619 | ||||
1620 | /* If the call dummy breakpoint is at the entry point it will | |||
1621 | cause problems when the inferior is rerun, so we better | |||
1622 | get rid of it. | |||
1623 | ||||
1624 | Also get rid of scope breakpoints. */ | |||
1625 | delete_breakpoint (b); | |||
1626 | break; | |||
1627 | ||||
1628 | case bp_watchpoint: | |||
1629 | case bp_hardware_watchpoint: | |||
1630 | case bp_read_watchpoint: | |||
1631 | case bp_access_watchpoint: | |||
1632 | ||||
1633 | /* Likewise for watchpoints on local expressions. */ | |||
1634 | if (b->exp_valid_block != NULL((void*)0)) | |||
1635 | delete_breakpoint (b); | |||
1636 | if (context == inf_starting) | |||
1637 | { | |||
1638 | /* Reset val field to force reread of starting value | |||
1639 | in insert_breakpoints. */ | |||
1640 | if (b->val) | |||
1641 | value_free (b->val)xfree (b->val); | |||
1642 | b->val = NULL((void*)0); | |||
1643 | } | |||
1644 | break; | |||
1645 | default: | |||
1646 | /* Likewise for exception catchpoints in dynamic-linked | |||
1647 | executables where required */ | |||
1648 | if (ep_is_exception_catchpoint (b) | |||
1649 | && deprecated_exception_catchpoints_are_fragile) | |||
1650 | { | |||
1651 | warning_needed = 1; | |||
1652 | delete_breakpoint (b); | |||
1653 | } | |||
1654 | break; | |||
1655 | } | |||
1656 | } | |||
1657 | ||||
1658 | if (deprecated_exception_catchpoints_are_fragile) | |||
1659 | deprecated_exception_support_initialized = 0; | |||
1660 | ||||
1661 | /* Don't issue the warning unless it's really needed... */ | |||
1662 | if (warning_needed && (context != inf_exited)) | |||
1663 | { | |||
1664 | warning ("Exception catchpoints from last run were deleted."); | |||
1665 | warning ("You must reinsert them explicitly."); | |||
1666 | warning_needed = 0; | |||
1667 | } | |||
1668 | } | |||
1669 | ||||
1670 | /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint | |||
1671 | exists at PC. It returns ordinary_breakpoint_here if it's an | |||
1672 | ordinary breakpoint, or permanent_breakpoint_here if it's a | |||
1673 | permanent breakpoint. | |||
1674 | - When continuing from a location with an ordinary breakpoint, we | |||
1675 | actually single step once before calling insert_breakpoints. | |||
1676 | - When continuing from a localion with a permanent breakpoint, we | |||
1677 | need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by | |||
1678 | the target, to advance the PC past the breakpoint. */ | |||
1679 | ||||
1680 | enum breakpoint_here | |||
1681 | breakpoint_here_p (CORE_ADDR pc) | |||
1682 | { | |||
1683 | struct bp_location *bpt; | |||
1684 | int any_breakpoint_here = 0; | |||
1685 | ||||
1686 | ALL_BP_LOCATIONS (bpt)for (bpt = bp_location_chain; bpt; bpt = bpt->next) | |||
1687 | { | |||
1688 | if (bpt->loc_type != bp_loc_software_breakpoint | |||
1689 | && bpt->loc_type != bp_loc_hardware_breakpoint) | |||
1690 | continue; | |||
1691 | ||||
1692 | if ((breakpoint_enabled (bpt->owner) | |||
1693 | || bpt->owner->enable_state == bp_permanent) | |||
1694 | && bpt->address == pc) /* bp is enabled and matches pc */ | |||
1695 | { | |||
1696 | if (overlay_debugging | |||
1697 | && section_is_overlay (bpt->section) | |||
1698 | && !section_is_mapped (bpt->section)) | |||
1699 | continue; /* unmapped overlay -- can't be a match */ | |||
1700 | else if (bpt->owner->enable_state == bp_permanent) | |||
1701 | return permanent_breakpoint_here; | |||
1702 | else | |||
1703 | any_breakpoint_here = 1; | |||
1704 | } | |||
1705 | } | |||
1706 | ||||
1707 | return any_breakpoint_here ? ordinary_breakpoint_here : 0; | |||
1708 | } | |||
1709 | ||||
1710 | ||||
1711 | /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(), | |||
1712 | but it only returns true if there is actually a breakpoint inserted | |||
1713 | at PC. */ | |||
1714 | ||||
1715 | int | |||
1716 | breakpoint_inserted_here_p (CORE_ADDR pc) | |||
1717 | { | |||
1718 | struct bp_location *bpt; | |||
1719 | ||||
1720 | ALL_BP_LOCATIONS (bpt)for (bpt = bp_location_chain; bpt; bpt = bpt->next) | |||
1721 | { | |||
1722 | if (bpt->loc_type != bp_loc_software_breakpoint | |||
1723 | && bpt->loc_type != bp_loc_hardware_breakpoint) | |||
1724 | continue; | |||
1725 | ||||
1726 | if (bpt->inserted | |||
1727 | && bpt->address == pc) /* bp is inserted and matches pc */ | |||
1728 | { | |||
1729 | if (overlay_debugging | |||
1730 | && section_is_overlay (bpt->section) | |||
1731 | && !section_is_mapped (bpt->section)) | |||
1732 | continue; /* unmapped overlay -- can't be a match */ | |||
1733 | else | |||
1734 | return 1; | |||
1735 | } | |||
1736 | } | |||
1737 | ||||
1738 | return 0; | |||
1739 | } | |||
1740 | ||||
1741 | /* This function returns non-zero iff there is a software breakpoint | |||
1742 | inserted at PC. */ | |||
1743 | ||||
1744 | int | |||
1745 | software_breakpoint_inserted_here_p (CORE_ADDR pc) | |||
1746 | { | |||
1747 | struct bp_location *bpt; | |||
1748 | int any_breakpoint_here = 0; | |||
1749 | ||||
1750 | ALL_BP_LOCATIONS (bpt)for (bpt = bp_location_chain; bpt; bpt = bpt->next) | |||
1751 | { | |||
1752 | if (bpt->loc_type != bp_loc_software_breakpoint) | |||
1753 | continue; | |||
1754 | ||||
1755 | if ((breakpoint_enabled (bpt->owner) | |||
1756 | || bpt->owner->enable_state == bp_permanent) | |||
1757 | && bpt->inserted | |||
1758 | && bpt->address == pc) /* bp is enabled and matches pc */ | |||
1759 | { | |||
1760 | if (overlay_debugging | |||
1761 | && section_is_overlay (bpt->section) | |||
1762 | && !section_is_mapped (bpt->section)) | |||
1763 | continue; /* unmapped overlay -- can't be a match */ | |||
1764 | else | |||
1765 | return 1; | |||
1766 | } | |||
1767 | } | |||
1768 | ||||
1769 | return 0; | |||
1770 | } | |||
1771 | ||||
1772 | /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at | |||
1773 | PC is valid for process/thread PTID. */ | |||
1774 | ||||
1775 | int | |||
1776 | breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid) | |||
1777 | { | |||
1778 | struct bp_location *bpt; | |||
1779 | int thread; | |||
1780 | ||||
1781 | thread = pid_to_thread_id (ptid); | |||
1782 | ||||
1783 | ALL_BP_LOCATIONS (bpt)for (bpt = bp_location_chain; bpt; bpt = bpt->next) | |||
1784 | { | |||
1785 | if (bpt->loc_type != bp_loc_software_breakpoint | |||
1786 | && bpt->loc_type != bp_loc_hardware_breakpoint) | |||
1787 | continue; | |||
1788 | ||||
1789 | if ((breakpoint_enabled (bpt->owner) | |||
1790 | || bpt->owner->enable_state == bp_permanent) | |||
1791 | && bpt->address == pc | |||
1792 | && (bpt->owner->thread == -1 || bpt->owner->thread == thread)) | |||
1793 | { | |||
1794 | if (overlay_debugging | |||
1795 | && section_is_overlay (bpt->section) | |||
1796 | && !section_is_mapped (bpt->section)) | |||
1797 | continue; /* unmapped overlay -- can't be a match */ | |||
1798 | else | |||
1799 | return 1; | |||
1800 | } | |||
1801 | } | |||
1802 | ||||
1803 | return 0; | |||
1804 | } | |||
1805 | ||||
1806 | ||||
1807 | /* bpstat stuff. External routines' interfaces are documented | |||
1808 | in breakpoint.h. */ | |||
1809 | ||||
1810 | int | |||
1811 | ep_is_catchpoint (struct breakpoint *ep) | |||
1812 | { | |||
1813 | return | |||
1814 | (ep->type == bp_catch_load) | |||
1815 | || (ep->type == bp_catch_unload) | |||
1816 | || (ep->type == bp_catch_fork) | |||
1817 | || (ep->type == bp_catch_vfork) | |||
1818 | || (ep->type == bp_catch_exec) | |||
1819 | || (ep->type == bp_catch_catch) | |||
1820 | || (ep->type == bp_catch_throw); | |||
1821 | ||||
1822 | /* ??rehrauer: Add more kinds here, as are implemented... */ | |||
1823 | } | |||
1824 | ||||
1825 | int | |||
1826 | ep_is_shlib_catchpoint (struct breakpoint *ep) | |||
1827 | { | |||
1828 | return | |||
1829 | (ep->type == bp_catch_load) | |||
1830 | || (ep->type == bp_catch_unload); | |||
1831 | } | |||
1832 | ||||
1833 | int | |||
1834 | ep_is_exception_catchpoint (struct breakpoint *ep) | |||
1835 | { | |||
1836 | return | |||
1837 | (ep->type == bp_catch_catch) | |||
1838 | || (ep->type == bp_catch_throw); | |||
1839 | } | |||
1840 | ||||
1841 | /* Clear a bpstat so that it says we are not at any breakpoint. | |||
1842 | Also free any storage that is part of a bpstat. */ | |||
1843 | ||||
1844 | void | |||
1845 | bpstat_clear (bpstat *bsp) | |||
1846 | { | |||
1847 | bpstat p; | |||
1848 | bpstat q; | |||
1849 | ||||
1850 | if (bsp == 0) | |||
1851 | return; | |||
1852 | p = *bsp; | |||
1853 | while (p != NULL((void*)0)) | |||
1854 | { | |||
1855 | q = p->next; | |||
1856 | if (p->old_val != NULL((void*)0)) | |||
1857 | value_free (p->old_val)xfree (p->old_val); | |||
1858 | free_command_lines (&p->commands); | |||
1859 | xfree (p); | |||
1860 | p = q; | |||
1861 | } | |||
1862 | *bsp = NULL((void*)0); | |||
1863 | } | |||
1864 | ||||
1865 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that | |||
1866 | is part of the bpstat is copied as well. */ | |||
1867 | ||||
1868 | bpstat | |||
1869 | bpstat_copy (bpstat bs) | |||
1870 | { | |||
1871 | bpstat p = NULL((void*)0); | |||
1872 | bpstat tmp; | |||
1873 | bpstat retval = NULL((void*)0); | |||
1874 | ||||
1875 | if (bs == NULL((void*)0)) | |||
1876 | return bs; | |||
1877 | ||||
1878 | for (; bs != NULL((void*)0); bs = bs->next) | |||
1879 | { | |||
1880 | tmp = (bpstat) xmalloc (sizeof (*tmp)); | |||
1881 | memcpy (tmp, bs, sizeof (*tmp)); | |||
1882 | if (bs->commands != NULL((void*)0)) | |||
1883 | tmp->commands = copy_command_lines (bs->commands); | |||
1884 | if (bs->old_val != NULL((void*)0)) | |||
1885 | tmp->old_val = value_copy (bs->old_val); | |||
1886 | ||||
1887 | if (p == NULL((void*)0)) | |||
1888 | /* This is the first thing in the chain. */ | |||
1889 | retval = tmp; | |||
1890 | else | |||
1891 | p->next = tmp; | |||
1892 | p = tmp; | |||
1893 | } | |||
1894 | p->next = NULL((void*)0); | |||
1895 | return retval; | |||
1896 | } | |||
1897 | ||||
1898 | /* Find the bpstat associated with this breakpoint */ | |||
1899 | ||||
1900 | bpstat | |||
1901 | bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint) | |||
1902 | { | |||
1903 | if (bsp == NULL((void*)0)) | |||
1904 | return NULL((void*)0); | |||
1905 | ||||
1906 | for (; bsp != NULL((void*)0); bsp = bsp->next) | |||
1907 | { | |||
1908 | if (bsp->breakpoint_at == breakpoint) | |||
1909 | return bsp; | |||
1910 | } | |||
1911 | return NULL((void*)0); | |||
1912 | } | |||
1913 | ||||
1914 | /* Find a step_resume breakpoint associated with this bpstat. | |||
1915 | (If there are multiple step_resume bp's on the list, this function | |||
1916 | will arbitrarily pick one.) | |||
1917 | ||||
1918 | It is an error to use this function if BPSTAT doesn't contain a | |||
1919 | step_resume breakpoint. | |||
1920 | ||||
1921 | See wait_for_inferior's use of this function. */ | |||
1922 | struct breakpoint * | |||
1923 | bpstat_find_step_resume_breakpoint (bpstat bsp) | |||
1924 | { | |||
1925 | int current_thread; | |||
1926 | ||||
1927 | if (bsp == NULL((void*)0)) | |||
1928 | error ("Internal error (bpstat_find_step_resume_breakpoint)"); | |||
1929 | ||||
1930 | current_thread = pid_to_thread_id (inferior_ptid); | |||
1931 | ||||
1932 | for (; bsp != NULL((void*)0); bsp = bsp->next) | |||
1933 | { | |||
1934 | if ((bsp->breakpoint_at != NULL((void*)0)) && | |||
1935 | (bsp->breakpoint_at->type == bp_step_resume) && | |||
1936 | (bsp->breakpoint_at->thread == current_thread || | |||
1937 | bsp->breakpoint_at->thread == -1)) | |||
1938 | return bsp->breakpoint_at; | |||
1939 | } | |||
1940 | ||||
1941 | error ("Internal error (no step_resume breakpoint found)"); | |||
1942 | } | |||
1943 | ||||
1944 | ||||
1945 | /* Return the breakpoint number of the first breakpoint we are stopped | |||
1946 | at. *BSP upon return is a bpstat which points to the remaining | |||
1947 | breakpoints stopped at (but which is not guaranteed to be good for | |||
1948 | anything but further calls to bpstat_num). | |||
1949 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ | |||
1950 | ||||
1951 | int | |||
1952 | bpstat_num (bpstat *bsp) | |||
1953 | { | |||
1954 | struct breakpoint *b; | |||
1955 | ||||
1956 | if ((*bsp) == NULL((void*)0)) | |||
1957 | return 0; /* No more breakpoint values */ | |||
1958 | else | |||
1959 | { | |||
1960 | b = (*bsp)->breakpoint_at; | |||
1961 | *bsp = (*bsp)->next; | |||
1962 | if (b == NULL((void*)0)) | |||
1963 | return -1; /* breakpoint that's been deleted since */ | |||
1964 | else | |||
1965 | return b->number; /* We have its number */ | |||
1966 | } | |||
1967 | } | |||
1968 | ||||
1969 | /* Modify BS so that the actions will not be performed. */ | |||
1970 | ||||
1971 | void | |||
1972 | bpstat_clear_actions (bpstat bs) | |||
1973 | { | |||
1974 | for (; bs != NULL((void*)0); bs = bs->next) | |||
1975 | { | |||
1976 | free_command_lines (&bs->commands); | |||
1977 | if (bs->old_val != NULL((void*)0)) | |||
1978 | { | |||
1979 | value_free (bs->old_val)xfree (bs->old_val); | |||
1980 | bs->old_val = NULL((void*)0); | |||
1981 | } | |||
1982 | } | |||
1983 | } | |||
1984 | ||||
1985 | /* Stub for cleaning up our state if we error-out of a breakpoint command */ | |||
1986 | static void | |||
1987 | cleanup_executing_breakpoints (void *ignore) | |||
1988 | { | |||
1989 | executing_breakpoint_commands = 0; | |||
1990 | } | |||
1991 | ||||
1992 | /* Execute all the commands associated with all the breakpoints at this | |||
1993 | location. Any of these commands could cause the process to proceed | |||
1994 | beyond this point, etc. We look out for such changes by checking | |||
1995 | the global "breakpoint_proceeded" after each command. */ | |||
1996 | ||||
1997 | void | |||
1998 | bpstat_do_actions (bpstat *bsp) | |||
1999 | { | |||
2000 | bpstat bs; | |||
2001 | struct cleanup *old_chain; | |||
2002 | ||||
2003 | /* Avoid endless recursion if a `source' command is contained | |||
2004 | in bs->commands. */ | |||
2005 | if (executing_breakpoint_commands) | |||
2006 | return; | |||
2007 | ||||
2008 | executing_breakpoint_commands = 1; | |||
2009 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); | |||
2010 | ||||
2011 | top: | |||
2012 | /* Note that (as of this writing), our callers all appear to | |||
2013 | be passing us the address of global stop_bpstat. And, if | |||
2014 | our calls to execute_control_command cause the inferior to | |||
2015 | proceed, that global (and hence, *bsp) will change. | |||
2016 | ||||
2017 | We must be careful to not touch *bsp unless the inferior | |||
2018 | has not proceeded. */ | |||
2019 | ||||
2020 | /* This pointer will iterate over the list of bpstat's. */ | |||
2021 | bs = *bsp; | |||
2022 | ||||
2023 | breakpoint_proceeded = 0; | |||
2024 | for (; bs != NULL((void*)0); bs = bs->next) | |||
2025 | { | |||
2026 | struct command_line *cmd; | |||
2027 | struct cleanup *this_cmd_tree_chain; | |||
2028 | ||||
2029 | /* Take ownership of the BSP's command tree, if it has one. | |||
2030 | ||||
2031 | The command tree could legitimately contain commands like | |||
2032 | 'step' and 'next', which call clear_proceed_status, which | |||
2033 | frees stop_bpstat's command tree. To make sure this doesn't | |||
2034 | free the tree we're executing out from under us, we need to | |||
2035 | take ownership of the tree ourselves. Since a given bpstat's | |||
2036 | commands are only executed once, we don't need to copy it; we | |||
2037 | can clear the pointer in the bpstat, and make sure we free | |||
2038 | the tree when we're done. */ | |||
2039 | cmd = bs->commands; | |||
2040 | bs->commands = 0; | |||
2041 | this_cmd_tree_chain = make_cleanup_free_command_lines (&cmd); | |||
2042 | ||||
2043 | while (cmd != NULL((void*)0)) | |||
2044 | { | |||
2045 | execute_control_command (cmd); | |||
2046 | ||||
2047 | if (breakpoint_proceeded) | |||
2048 | break; | |||
2049 | else | |||
2050 | cmd = cmd->next; | |||
2051 | } | |||
2052 | ||||
2053 | /* We can free this command tree now. */ | |||
2054 | do_cleanups (this_cmd_tree_chain); | |||
2055 | ||||
2056 | if (breakpoint_proceeded) | |||
2057 | /* The inferior is proceeded by the command; bomb out now. | |||
2058 | The bpstat chain has been blown away by wait_for_inferior. | |||
2059 | But since execution has stopped again, there is a new bpstat | |||
2060 | to look at, so start over. */ | |||
2061 | goto top; | |||
2062 | } | |||
2063 | do_cleanups (old_chain); | |||
2064 | } | |||
2065 | ||||
2066 | /* This is the normal print function for a bpstat. In the future, | |||
2067 | much of this logic could (should?) be moved to bpstat_stop_status, | |||
2068 | by having it set different print_it values. | |||
2069 | ||||
2070 | Current scheme: When we stop, bpstat_print() is called. It loops | |||
2071 | through the bpstat list of things causing this stop, calling the | |||
2072 | print_bp_stop_message function on each one. The behavior of the | |||
2073 | print_bp_stop_message function depends on the print_it field of | |||
2074 | bpstat. If such field so indicates, call this function here. | |||
2075 | ||||
2076 | Return values from this routine (ultimately used by bpstat_print() | |||
2077 | and normal_stop() to decide what to do): | |||
2078 | PRINT_NOTHING: Means we already printed all we needed to print, | |||
2079 | don't print anything else. | |||
2080 | PRINT_SRC_ONLY: Means we printed something, and we do *not* desire | |||
2081 | that something to be followed by a location. | |||
2082 | PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire | |||
2083 | that something to be followed by a location. | |||
2084 | PRINT_UNKNOWN: Means we printed nothing or we need to do some more | |||
2085 | analysis. */ | |||
2086 | ||||
2087 | static enum print_stop_action | |||
2088 | print_it_typical (bpstat bs) | |||
2089 | { | |||
2090 | struct cleanup *old_chain, *ui_out_chain; | |||
2091 | struct ui_stream *stb; | |||
2092 | stb = ui_out_stream_new (uiout); | |||
2093 | old_chain = make_cleanup_ui_out_stream_delete (stb); | |||
2094 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint | |||
2095 | which has since been deleted. */ | |||
2096 | if (bs->breakpoint_at == NULL((void*)0)) | |||
2097 | return PRINT_UNKNOWN; | |||
2098 | ||||
2099 | switch (bs->breakpoint_at->type) | |||
2100 | { | |||
2101 | case bp_breakpoint: | |||
2102 | case bp_hardware_breakpoint: | |||
2103 | if (bs->breakpoint_at->loc->address != bs->breakpoint_at->loc->requested_address) | |||
2104 | breakpoint_adjustment_warning (bs->breakpoint_at->loc->requested_address, | |||
2105 | bs->breakpoint_at->loc->address, | |||
2106 | bs->breakpoint_at->number, 1); | |||
2107 | annotate_breakpoint (bs->breakpoint_at->number); | |||
2108 | ui_out_text (uiout, "\nBreakpoint "); | |||
2109 | if (ui_out_is_mi_like_p (uiout)) | |||
2110 | ui_out_field_string (uiout, "reason", "breakpoint-hit"); | |||
2111 | ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number); | |||
2112 | ui_out_text (uiout, ", "); | |||
2113 | return PRINT_SRC_AND_LOC; | |||
2114 | break; | |||
2115 | ||||
2116 | case bp_shlib_event: | |||
2117 | /* Did we stop because the user set the stop_on_solib_events | |||
2118 | variable? (If so, we report this as a generic, "Stopped due | |||
2119 | to shlib event" message.) */ | |||
2120 | printf_filtered ("Stopped due to shared library event\n"); | |||
2121 | return PRINT_NOTHING; | |||
2122 | break; | |||
2123 | ||||
2124 | case bp_thread_event: | |||
2125 | /* Not sure how we will get here. | |||
2126 | GDB should not stop for these breakpoints. */ | |||
2127 | printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n"); | |||
2128 | return PRINT_NOTHING; | |||
2129 | break; | |||
2130 | ||||
2131 | case bp_overlay_event: | |||
2132 | /* By analogy with the thread event, GDB should not stop for these. */ | |||
2133 | printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n"); | |||
2134 | return PRINT_NOTHING; | |||
2135 | break; | |||
2136 | ||||
2137 | case bp_catch_load: | |||
2138 | annotate_catchpoint (bs->breakpoint_at->number); | |||
2139 | printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); | |||
2140 | printf_filtered ("loaded"); | |||
2141 | printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); | |||
2142 | return PRINT_SRC_AND_LOC; | |||
2143 | break; | |||
2144 | ||||
2145 | case bp_catch_unload: | |||
2146 | annotate_catchpoint (bs->breakpoint_at->number); | |||
2147 | printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); | |||
2148 | printf_filtered ("unloaded"); | |||
2149 | printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); | |||
2150 | return PRINT_SRC_AND_LOC; | |||
2151 | break; | |||
2152 | ||||
2153 | case bp_catch_fork: | |||
2154 | annotate_catchpoint (bs->breakpoint_at->number); | |||
2155 | printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); | |||
2156 | printf_filtered ("forked"); | |||
2157 | printf_filtered (" process %d), ", | |||
2158 | bs->breakpoint_at->forked_inferior_pid); | |||
2159 | return PRINT_SRC_AND_LOC; | |||
2160 | break; | |||
2161 | ||||
2162 | case bp_catch_vfork: | |||
2163 | annotate_catchpoint (bs->breakpoint_at->number); | |||
2164 | printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); | |||
2165 | printf_filtered ("vforked"); | |||
2166 | printf_filtered (" process %d), ", | |||
2167 | bs->breakpoint_at->forked_inferior_pid); | |||
2168 | return PRINT_SRC_AND_LOC; | |||
2169 | break; | |||
2170 | ||||
2171 | case bp_catch_exec: | |||
2172 | annotate_catchpoint (bs->breakpoint_at->number); | |||
2173 | printf_filtered ("\nCatchpoint %d (exec'd %s), ", | |||
2174 | bs->breakpoint_at->number, | |||
2175 | bs->breakpoint_at->exec_pathname); | |||
2176 | return PRINT_SRC_AND_LOC; | |||
2177 | break; | |||
2178 | ||||
2179 | case bp_catch_catch: | |||
2180 | if (current_exception_event && | |||
2181 | (CURRENT_EXCEPTION_KIND(current_exception_event->kind) == EX_EVENT_CATCH)) | |||
2182 | { | |||
2183 | annotate_catchpoint (bs->breakpoint_at->number); | |||
2184 | printf_filtered ("\nCatchpoint %d (exception caught), ", | |||
2185 | bs->breakpoint_at->number); | |||
2186 | printf_filtered ("throw location "); | |||
2187 | if (CURRENT_EXCEPTION_THROW_PC(current_exception_event->throw_sal.pc) && CURRENT_EXCEPTION_THROW_LINE(current_exception_event->throw_sal.line)) | |||
2188 | printf_filtered ("%s:%d", | |||
2189 | CURRENT_EXCEPTION_THROW_FILE(current_exception_event->throw_sal.symtab->filename), | |||
2190 | CURRENT_EXCEPTION_THROW_LINE(current_exception_event->throw_sal.line)); | |||
2191 | else | |||
2192 | printf_filtered ("unknown"); | |||
2193 | ||||
2194 | printf_filtered (", catch location "); | |||
2195 | if (CURRENT_EXCEPTION_CATCH_PC(current_exception_event->catch_sal.pc) && CURRENT_EXCEPTION_CATCH_LINE(current_exception_event->catch_sal.line)) | |||
2196 | printf_filtered ("%s:%d", | |||
2197 | CURRENT_EXCEPTION_CATCH_FILE(current_exception_event->catch_sal.symtab->filename), | |||
2198 | CURRENT_EXCEPTION_CATCH_LINE(current_exception_event->catch_sal.line)); | |||
2199 | else | |||
2200 | printf_filtered ("unknown"); | |||
2201 | ||||
2202 | printf_filtered ("\n"); | |||
2203 | /* don't bother to print location frame info */ | |||
2204 | return PRINT_SRC_ONLY; | |||
2205 | } | |||
2206 | else | |||
2207 | { | |||
2208 | /* really throw, some other bpstat will handle it */ | |||
2209 | return PRINT_UNKNOWN; | |||
2210 | } | |||
2211 | break; | |||
2212 | ||||
2213 | case bp_catch_throw: | |||
2214 | if (current_exception_event && | |||
2215 | (CURRENT_EXCEPTION_KIND(current_exception_event->kind) == EX_EVENT_THROW)) | |||
2216 | { | |||
2217 | annotate_catchpoint (bs->breakpoint_at->number); | |||
2218 | printf_filtered ("\nCatchpoint %d (exception thrown), ", | |||
2219 | bs->breakpoint_at->number); | |||
2220 | printf_filtered ("throw location "); | |||
2221 | if (CURRENT_EXCEPTION_THROW_PC(current_exception_event->throw_sal.pc) && CURRENT_EXCEPTION_THROW_LINE(current_exception_event->throw_sal.line)) | |||
2222 | printf_filtered ("%s:%d", | |||
2223 | CURRENT_EXCEPTION_THROW_FILE(current_exception_event->throw_sal.symtab->filename), | |||
2224 | CURRENT_EXCEPTION_THROW_LINE(current_exception_event->throw_sal.line)); | |||
2225 | else | |||
2226 | printf_filtered ("unknown"); | |||
2227 | ||||
2228 | printf_filtered (", catch location "); | |||
2229 | if (CURRENT_EXCEPTION_CATCH_PC(current_exception_event->catch_sal.pc) && CURRENT_EXCEPTION_CATCH_LINE(current_exception_event->catch_sal.line)) | |||
2230 | printf_filtered ("%s:%d", | |||
2231 | CURRENT_EXCEPTION_CATCH_FILE(current_exception_event->catch_sal.symtab->filename), | |||
2232 | CURRENT_EXCEPTION_CATCH_LINE(current_exception_event->catch_sal.line)); | |||
2233 | else | |||
2234 | printf_filtered ("unknown"); | |||
2235 | ||||
2236 | printf_filtered ("\n"); | |||
2237 | /* don't bother to print location frame info */ | |||
2238 | return PRINT_SRC_ONLY; | |||
2239 | } | |||
2240 | else | |||
2241 | { | |||
2242 | /* really catch, some other bpstat will handle it */ | |||
2243 | return PRINT_UNKNOWN; | |||
2244 | } | |||
2245 | break; | |||
2246 | ||||
2247 | case bp_watchpoint: | |||
2248 | case bp_hardware_watchpoint: | |||
2249 | if (bs->old_val != NULL((void*)0)) | |||
2250 | { | |||
2251 | annotate_watchpoint (bs->breakpoint_at->number); | |||
2252 | if (ui_out_is_mi_like_p (uiout)) | |||
2253 | ui_out_field_string (uiout, "reason", "watchpoint-trigger"); | |||
2254 | mention (bs->breakpoint_at); | |||
2255 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value"); | |||
2256 | ui_out_text (uiout, "\nOld value = "); | |||
2257 | value_print (bs->old_val, stb->stream, 0, Val_pretty_default); | |||
2258 | ui_out_field_stream (uiout, "old", stb); | |||
2259 | ui_out_text (uiout, "\nNew value = "); | |||
2260 | value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default); | |||
2261 | ui_out_field_stream (uiout, "new", stb); | |||
2262 | do_cleanups (ui_out_chain); | |||
2263 | ui_out_text (uiout, "\n"); | |||
2264 | value_free (bs->old_val)xfree (bs->old_val); | |||
2265 | bs->old_val = NULL((void*)0); | |||
2266 | } | |||
2267 | /* More than one watchpoint may have been triggered. */ | |||
2268 | return PRINT_UNKNOWN; | |||
2269 | break; | |||
2270 | ||||
2271 | case bp_read_watchpoint: | |||
2272 | if (ui_out_is_mi_like_p (uiout)) | |||
2273 | ui_out_field_string (uiout, "reason", "read-watchpoint-trigger"); | |||
2274 | mention (bs->breakpoint_at); | |||
2275 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value"); | |||
2276 | ui_out_text (uiout, "\nValue = "); | |||
2277 | value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default); | |||
2278 | ui_out_field_stream (uiout, "value", stb); | |||
2279 | do_cleanups (ui_out_chain); | |||
2280 | ui_out_text (uiout, "\n"); | |||
2281 | return PRINT_UNKNOWN; | |||
2282 | break; | |||
2283 | ||||
2284 | case bp_access_watchpoint: | |||
2285 | if (bs->old_val != NULL((void*)0)) | |||
2286 | { | |||
2287 | annotate_watchpoint (bs->breakpoint_at->number); | |||
2288 | if (ui_out_is_mi_like_p (uiout)) | |||
2289 | ui_out_field_string (uiout, "reason", "access-watchpoint-trigger"); | |||
2290 | mention (bs->breakpoint_at); | |||
2291 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value"); | |||
2292 | ui_out_text (uiout, "\nOld value = "); | |||
2293 | value_print (bs->old_val, stb->stream, 0, Val_pretty_default); | |||
2294 | ui_out_field_stream (uiout, "old", stb); | |||
2295 | value_free (bs->old_val)xfree (bs->old_val); | |||
2296 | bs->old_val = NULL((void*)0); | |||
2297 | ui_out_text (uiout, "\nNew value = "); | |||
2298 | } | |||
2299 | else | |||
2300 | { | |||
2301 | mention (bs->breakpoint_at); | |||
2302 | if (ui_out_is_mi_like_p (uiout)) | |||
2303 | ui_out_field_string (uiout, "reason", "access-watchpoint-trigger"); | |||
2304 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value"); | |||
2305 | ui_out_text (uiout, "\nValue = "); | |||
2306 | } | |||
2307 | value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default); | |||
2308 | ui_out_field_stream (uiout, "new", stb); | |||
2309 | do_cleanups (ui_out_chain); | |||
2310 | ui_out_text (uiout, "\n"); | |||
2311 | return PRINT_UNKNOWN; | |||
2312 | break; | |||
2313 | ||||
2314 | /* Fall through, we don't deal with these types of breakpoints | |||
2315 | here. */ | |||
2316 | ||||
2317 | case bp_finish: | |||
2318 | if (ui_out_is_mi_like_p (uiout)) | |||
2319 | ui_out_field_string (uiout, "reason", "function-finished"); | |||
2320 | return PRINT_UNKNOWN; | |||
2321 | break; | |||
2322 | ||||
2323 | case bp_until: | |||
2324 | if (ui_out_is_mi_like_p (uiout)) | |||
2325 | ui_out_field_string (uiout, "reason", "location-reached"); | |||
2326 | return PRINT_UNKNOWN; | |||
2327 | break; | |||
2328 | ||||
2329 | case bp_none: | |||
2330 | case bp_longjmp: | |||
2331 | case bp_longjmp_resume: | |||
2332 | case bp_step_resume: | |||
2333 | case bp_through_sigtramp: | |||
2334 | case bp_watchpoint_scope: | |||
2335 | case bp_call_dummy: | |||
2336 | default: | |||
2337 | return PRINT_UNKNOWN; | |||
2338 | } | |||
2339 | } | |||
2340 | ||||
2341 | /* Generic routine for printing messages indicating why we | |||
2342 | stopped. The behavior of this function depends on the value | |||
2343 | 'print_it' in the bpstat structure. Under some circumstances we | |||
2344 | may decide not to print anything here and delegate the task to | |||
2345 | normal_stop(). */ | |||
2346 | ||||
2347 | static enum print_stop_action | |||
2348 | print_bp_stop_message (bpstat bs) | |||
2349 | { | |||
2350 | switch (bs->print_it) | |||
2351 | { | |||
2352 | case print_it_noop: | |||
2353 | /* Nothing should be printed for this bpstat entry. */ | |||
2354 | return PRINT_UNKNOWN; | |||
2355 | break; | |||
2356 | ||||
2357 | case print_it_done: | |||
2358 | /* We still want to print the frame, but we already printed the | |||
2359 | relevant messages. */ | |||
2360 | return PRINT_SRC_AND_LOC; | |||
2361 | break; | |||
2362 | ||||
2363 | case print_it_normal: | |||
2364 | /* Normal case. Call the breakpoint's print_it method, or | |||
2365 | print_it_typical. */ | |||
2366 | if (bs->breakpoint_at != NULL((void*)0) && bs->breakpoint_at->ops != NULL((void*)0) | |||
2367 | && bs->breakpoint_at->ops->print_it != NULL((void*)0)) | |||
2368 | return bs->breakpoint_at->ops->print_it (bs->breakpoint_at); | |||
2369 | else | |||
2370 | return print_it_typical (bs); | |||
2371 | break; | |||
2372 | ||||
2373 | default: | |||
2374 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__2374, | |||
2375 | "print_bp_stop_message: unrecognized enum value"); | |||
2376 | break; | |||
2377 | } | |||
2378 | } | |||
2379 | ||||
2380 | /* Print a message indicating what happened. This is called from | |||
2381 | normal_stop(). The input to this routine is the head of the bpstat | |||
2382 | list - a list of the eventpoints that caused this stop. This | |||
2383 | routine calls the generic print routine for printing a message | |||
2384 | about reasons for stopping. This will print (for example) the | |||
2385 | "Breakpoint n," part of the output. The return value of this | |||
2386 | routine is one of: | |||
2387 | ||||
2388 | PRINT_UNKNOWN: Means we printed nothing | |||
2389 | PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent | |||
2390 | code to print the location. An example is | |||
2391 | "Breakpoint 1, " which should be followed by | |||
2392 | the location. | |||
2393 | PRINT_SRC_ONLY: Means we printed something, but there is no need | |||
2394 | to also print the location part of the message. | |||
2395 | An example is the catch/throw messages, which | |||
2396 | don't require a location appended to the end. | |||
2397 | PRINT_NOTHING: We have done some printing and we don't need any | |||
2398 | further info to be printed.*/ | |||
2399 | ||||
2400 | enum print_stop_action | |||
2401 | bpstat_print (bpstat bs) | |||
2402 | { | |||
2403 | int val; | |||
2404 | ||||
2405 | /* Maybe another breakpoint in the chain caused us to stop. | |||
2406 | (Currently all watchpoints go on the bpstat whether hit or not. | |||
2407 | That probably could (should) be changed, provided care is taken | |||
2408 | with respect to bpstat_explains_signal). */ | |||
2409 | for (; bs; bs = bs->next) | |||
2410 | { | |||
2411 | val = print_bp_stop_message (bs); | |||
2412 | if (val == PRINT_SRC_ONLY | |||
2413 | || val == PRINT_SRC_AND_LOC | |||
2414 | || val == PRINT_NOTHING) | |||
2415 | return val; | |||
2416 | } | |||
2417 | ||||
2418 | /* We reached the end of the chain, or we got a null BS to start | |||
2419 | with and nothing was printed. */ | |||
2420 | return PRINT_UNKNOWN; | |||
2421 | } | |||
2422 | ||||
2423 | /* Evaluate the expression EXP and return 1 if value is zero. | |||
2424 | This is used inside a catch_errors to evaluate the breakpoint condition. | |||
2425 | The argument is a "struct expression *" that has been cast to char * to | |||
2426 | make it pass through catch_errors. */ | |||
2427 | ||||
2428 | static int | |||
2429 | breakpoint_cond_eval (void *exp) | |||
2430 | { | |||
2431 | struct value *mark = value_mark (); | |||
2432 | int i = !value_true (evaluate_expression ((struct expression *) exp)); | |||
2433 | value_free_to_mark (mark); | |||
2434 | return i; | |||
2435 | } | |||
2436 | ||||
2437 | /* Allocate a new bpstat and chain it to the current one. */ | |||
2438 | ||||
2439 | static bpstat | |||
2440 | bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ ) | |||
2441 | { | |||
2442 | bpstat bs; | |||
2443 | ||||
2444 | bs = (bpstat) xmalloc (sizeof (*bs)); | |||
2445 | cbs->next = bs; | |||
2446 | bs->breakpoint_at = b; | |||
2447 | /* If the condition is false, etc., don't do the commands. */ | |||
2448 | bs->commands = NULL((void*)0); | |||
2449 | bs->old_val = NULL((void*)0); | |||
2450 | bs->print_it = print_it_normal; | |||
2451 | return bs; | |||
2452 | } | |||
2453 | ||||
2454 | /* Possible return values for watchpoint_check (this can't be an enum | |||
2455 | because of check_errors). */ | |||
2456 | /* The watchpoint has been deleted. */ | |||
2457 | #define WP_DELETED1 1 | |||
2458 | /* The value has changed. */ | |||
2459 | #define WP_VALUE_CHANGED2 2 | |||
2460 | /* The value has not changed. */ | |||
2461 | #define WP_VALUE_NOT_CHANGED3 3 | |||
2462 | ||||
2463 | #define BP_TEMPFLAG1 1 | |||
2464 | #define BP_HARDWAREFLAG2 2 | |||
2465 | ||||
2466 | /* Check watchpoint condition. */ | |||
2467 | ||||
2468 | static int | |||
2469 | watchpoint_check (void *p) | |||
2470 | { | |||
2471 | bpstat bs = (bpstat) p; | |||
2472 | struct breakpoint *b; | |||
2473 | struct frame_info *fr; | |||
2474 | int within_current_scope; | |||
2475 | ||||
2476 | b = bs->breakpoint_at; | |||
2477 | ||||
2478 | if (b->exp_valid_block == NULL((void*)0)) | |||
2479 | within_current_scope = 1; | |||
2480 | else | |||
2481 | { | |||
2482 | /* There is no current frame at this moment. If we're going to have | |||
2483 | any chance of handling watchpoints on local variables, we'll need | |||
2484 | the frame chain (so we can determine if we're in scope). */ | |||
2485 | reinit_frame_cache (); | |||
2486 | fr = frame_find_by_id (b->watchpoint_frame); | |||
2487 | within_current_scope = (fr != NULL((void*)0)); | |||
2488 | /* in_function_epilogue_p() returns a non-zero value if we're still | |||
2489 | in the function but the stack frame has already been invalidated. | |||
2490 | Since we can't rely on the values of local variables after the | |||
2491 | stack has been destroyed, we are treating the watchpoint in that | |||
2492 | state as `not changed' without further checking. | |||
2493 | ||||
2494 | vinschen/2003-09-04: The former implementation left out the case | |||
2495 | that the watchpoint frame couldn't be found by frame_find_by_id() | |||
2496 | because the current PC is currently in an epilogue. Calling | |||
2497 | gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */ | |||
2498 | if ((!within_current_scope || fr == get_current_frame ()) | |||
2499 | && gdbarch_in_function_epilogue_p (current_gdbarch, read_pc ())) | |||
2500 | return WP_VALUE_NOT_CHANGED3; | |||
2501 | if (fr && within_current_scope) | |||
2502 | /* If we end up stopping, the current frame will get selected | |||
2503 | in normal_stop. So this call to select_frame won't affect | |||
2504 | the user. */ | |||
2505 | select_frame (fr); | |||
2506 | } | |||
2507 | ||||
2508 | if (within_current_scope) | |||
2509 | { | |||
2510 | /* We use value_{,free_to_}mark because it could be a | |||
2511 | *long* time before we return to the command level and | |||
2512 | call free_all_values. We can't call free_all_values because | |||
2513 | we might be in the middle of evaluating a function call. */ | |||
2514 | ||||
2515 | struct value *mark = value_mark (); | |||
2516 | struct value *new_val = evaluate_expression (bs->breakpoint_at->exp); | |||
2517 | if (!value_equal (b->val, new_val)) | |||
2518 | { | |||
2519 | release_value (new_val); | |||
2520 | value_free_to_mark (mark); | |||
2521 | bs->old_val = b->val; | |||
2522 | b->val = new_val; | |||
2523 | /* We will stop here */ | |||
2524 | return WP_VALUE_CHANGED2; | |||
2525 | } | |||
2526 | else | |||
2527 | { | |||
2528 | /* Nothing changed, don't do anything. */ | |||
2529 | value_free_to_mark (mark); | |||
2530 | /* We won't stop here */ | |||
2531 | return WP_VALUE_NOT_CHANGED3; | |||
2532 | } | |||
2533 | } | |||
2534 | else | |||
2535 | { | |||
2536 | /* This seems like the only logical thing to do because | |||
2537 | if we temporarily ignored the watchpoint, then when | |||
2538 | we reenter the block in which it is valid it contains | |||
2539 | garbage (in the case of a function, it may have two | |||
2540 | garbage values, one before and one after the prologue). | |||
2541 | So we can't even detect the first assignment to it and | |||
2542 | watch after that (since the garbage may or may not equal | |||
2543 | the first value assigned). */ | |||
2544 | /* We print all the stop information in print_it_typical(), but | |||
2545 | in this case, by the time we call print_it_typical() this bp | |||
2546 | will be deleted already. So we have no choice but print the | |||
2547 | information here. */ | |||
2548 | if (ui_out_is_mi_like_p (uiout)) | |||
2549 | ui_out_field_string (uiout, "reason", "watchpoint-scope"); | |||
2550 | ui_out_text (uiout, "\nWatchpoint "); | |||
2551 | ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number); | |||
2552 | ui_out_text (uiout, " deleted because the program has left the block in\n\ | |||
2553 | which its expression is valid.\n"); | |||
2554 | ||||
2555 | if (b->related_breakpoint) | |||
2556 | b->related_breakpoint->disposition = disp_del_at_next_stop; | |||
2557 | b->disposition = disp_del_at_next_stop; | |||
2558 | ||||
2559 | return WP_DELETED1; | |||
2560 | } | |||
2561 | } | |||
2562 | ||||
2563 | /* Get a bpstat associated with having just stopped at address | |||
2564 | BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the | |||
2565 | target thinks we stopped due to a hardware watchpoint, 0 if we | |||
2566 | know we did not trigger a hardware watchpoint, and -1 if we do not know. */ | |||
2567 | ||||
2568 | /* Determine whether we stopped at a breakpoint, etc, or whether we | |||
2569 | don't understand this stop. Result is a chain of bpstat's such that: | |||
2570 | ||||
2571 | if we don't understand the stop, the result is a null pointer. | |||
2572 | ||||
2573 | if we understand why we stopped, the result is not null. | |||
2574 | ||||
2575 | Each element of the chain refers to a particular breakpoint or | |||
2576 | watchpoint at which we have stopped. (We may have stopped for | |||
2577 | several reasons concurrently.) | |||
2578 | ||||
2579 | Each element of the chain has valid next, breakpoint_at, | |||
2580 | commands, FIXME??? fields. */ | |||
2581 | ||||
2582 | bpstat | |||
2583 | bpstat_stop_status (CORE_ADDR bp_addr, ptid_t ptid, int stopped_by_watchpoint) | |||
2584 | { | |||
2585 | struct breakpoint *b, *temp; | |||
2586 | /* True if we've hit a breakpoint (as opposed to a watchpoint). */ | |||
2587 | int real_breakpoint = 0; | |||
2588 | /* Root of the chain of bpstat's */ | |||
2589 | struct bpstats root_bs[1]; | |||
2590 | /* Pointer to the last thing in the chain currently. */ | |||
2591 | bpstat bs = root_bs; | |||
2592 | int thread_id = pid_to_thread_id (ptid); | |||
2593 | ||||
2594 | ALL_BREAKPOINTS_SAFE (b, temp)for (b = breakpoint_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
2595 | { | |||
2596 | if (!breakpoint_enabled (b) && b->enable_state != bp_permanent) | |||
2597 | continue; | |||
2598 | ||||
2599 | if (b->type != bp_watchpoint | |||
2600 | && b->type != bp_hardware_watchpoint | |||
2601 | && b->type != bp_read_watchpoint | |||
2602 | && b->type != bp_access_watchpoint | |||
2603 | && b->type != bp_hardware_breakpoint | |||
2604 | && b->type != bp_catch_fork | |||
2605 | && b->type != bp_catch_vfork | |||
2606 | && b->type != bp_catch_exec | |||
2607 | && b->type != bp_catch_catch | |||
2608 | && b->type != bp_catch_throw) /* a non-watchpoint bp */ | |||
2609 | { | |||
2610 | if (b->loc->address != bp_addr) /* address doesn't match */ | |||
2611 | continue; | |||
2612 | if (overlay_debugging /* unmapped overlay section */ | |||
2613 | && section_is_overlay (b->loc->section) | |||
2614 | && !section_is_mapped (b->loc->section)) | |||
2615 | continue; | |||
2616 | } | |||
2617 | ||||
2618 | /* Continuable hardware watchpoints are treated as non-existent if the | |||
2619 | reason we stopped wasn't a hardware watchpoint (we didn't stop on | |||
2620 | some data address). Otherwise gdb won't stop on a break instruction | |||
2621 | in the code (not from a breakpoint) when a hardware watchpoint has | |||
2622 | been defined. */ | |||
2623 | ||||
2624 | if ((b->type == bp_hardware_watchpoint | |||
2625 | || b->type == bp_read_watchpoint | |||
2626 | || b->type == bp_access_watchpoint) | |||
2627 | && !stopped_by_watchpoint) | |||
2628 | continue; | |||
2629 | ||||
2630 | if (b->type == bp_hardware_breakpoint) | |||
2631 | { | |||
2632 | if (b->loc->address != bp_addr) | |||
2633 | continue; | |||
2634 | if (overlay_debugging /* unmapped overlay section */ | |||
2635 | && section_is_overlay (b->loc->section) | |||
2636 | && !section_is_mapped (b->loc->section)) | |||
2637 | continue; | |||
2638 | } | |||
2639 | ||||
2640 | /* Is this a catchpoint of a load or unload? If so, did we | |||
2641 | get a load or unload of the specified library? If not, | |||
2642 | ignore it. */ | |||
2643 | if ((b->type == bp_catch_load) | |||
2644 | #if defined(SOLIB_HAVE_LOAD_EVENT) | |||
2645 | && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid))) | |||
2646 | || ((b->dll_pathname != NULL((void*)0)) | |||
2647 | && (strcmp (b->dll_pathname, | |||
2648 | SOLIB_LOADED_LIBRARY_PATHNAME ("" | |||
2649 | PIDGET (inferior_ptid))"") | |||
2650 | != 0))) | |||
2651 | #endif | |||
2652 | ) | |||
2653 | continue; | |||
2654 | ||||
2655 | if ((b->type == bp_catch_unload) | |||
2656 | #if defined(SOLIB_HAVE_UNLOAD_EVENT) | |||
2657 | && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid))) | |||
2658 | || ((b->dll_pathname != NULL((void*)0)) | |||
2659 | && (strcmp (b->dll_pathname, | |||
2660 | SOLIB_UNLOADED_LIBRARY_PATHNAME ("" | |||
2661 | PIDGET (inferior_ptid))"") | |||
2662 | != 0))) | |||
2663 | #endif | |||
2664 | ) | |||
2665 | continue; | |||
2666 | ||||
2667 | if ((b->type == bp_catch_fork) | |||
2668 | && !inferior_has_forked (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid)), | |||
2669 | &b->forked_inferior_pid)) | |||
2670 | continue; | |||
2671 | ||||
2672 | if ((b->type == bp_catch_vfork) | |||
2673 | && !inferior_has_vforked (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid)), | |||
2674 | &b->forked_inferior_pid)) | |||
2675 | continue; | |||
2676 | ||||
2677 | if ((b->type == bp_catch_exec) | |||
2678 | && !inferior_has_execd (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid)), &b->exec_pathname)) | |||
2679 | continue; | |||
2680 | ||||
2681 | if (ep_is_exception_catchpoint (b) && | |||
2682 | !(current_exception_event = target_get_current_exception_event ()(*current_target.to_get_current_exception_event) ())) | |||
2683 | continue; | |||
2684 | ||||
2685 | /* Come here if it's a watchpoint, or if the break address matches */ | |||
2686 | ||||
2687 | bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ | |||
2688 | ||||
2689 | /* Watchpoints may change this, if not found to have triggered. */ | |||
2690 | bs->stop = 1; | |||
2691 | bs->print = 1; | |||
2692 | ||||
2693 | if (b->type == bp_watchpoint || | |||
2694 | b->type == bp_hardware_watchpoint) | |||
2695 | { | |||
2696 | char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n", | |||
2697 | b->number); | |||
2698 | struct cleanup *cleanups = make_cleanup (xfree, message); | |||
2699 | int e = catch_errors (watchpoint_check, bs, message, | |||
2700 | RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
2701 | do_cleanups (cleanups); | |||
2702 | switch (e) | |||
2703 | { | |||
2704 | case WP_DELETED1: | |||
2705 | /* We've already printed what needs to be printed. */ | |||
2706 | /* Actually this is superfluous, because by the time we | |||
2707 | call print_it_typical() the wp will be already deleted, | |||
2708 | and the function will return immediately. */ | |||
2709 | bs->print_it = print_it_done; | |||
2710 | /* Stop. */ | |||
2711 | break; | |||
2712 | case WP_VALUE_CHANGED2: | |||
2713 | /* Stop. */ | |||
2714 | ++(b->hit_count); | |||
2715 | break; | |||
2716 | case WP_VALUE_NOT_CHANGED3: | |||
2717 | /* Don't stop. */ | |||
2718 | bs->print_it = print_it_noop; | |||
2719 | bs->stop = 0; | |||
2720 | continue; | |||
2721 | default: | |||
2722 | /* Can't happen. */ | |||
2723 | /* FALLTHROUGH */ | |||
2724 | case 0: | |||
2725 | /* Error from catch_errors. */ | |||
2726 | printf_filtered ("Watchpoint %d deleted.\n", b->number); | |||
2727 | if (b->related_breakpoint) | |||
2728 | b->related_breakpoint->disposition = disp_del_at_next_stop; | |||
2729 | b->disposition = disp_del_at_next_stop; | |||
2730 | /* We've already printed what needs to be printed. */ | |||
2731 | bs->print_it = print_it_done; | |||
2732 | ||||
2733 | /* Stop. */ | |||
2734 | break; | |||
2735 | } | |||
2736 | } | |||
2737 | else if (b->type == bp_read_watchpoint || | |||
2738 | b->type == bp_access_watchpoint) | |||
2739 | { | |||
2740 | CORE_ADDR addr; | |||
2741 | struct value *v; | |||
2742 | int found = 0; | |||
2743 | ||||
2744 | if (!target_stopped_data_address (¤t_target, &addr)(*¤t_target.to_stopped_data_address) (¤t_target , &addr)) | |||
2745 | continue; | |||
2746 | for (v = b->val_chain; v; v = v->next) | |||
2747 | { | |||
2748 | if (VALUE_LVAL (v)(v)->lval == lval_memory | |||
2749 | && ! VALUE_LAZY (v)(v)->lazy) | |||
2750 | { | |||
2751 | struct type *vtype = check_typedef (VALUE_TYPE (v)(v)->type); | |||
2752 | ||||
2753 | if (v == b->val_chain | |||
2754 | || (TYPE_CODE (vtype)(vtype)->main_type->code != TYPE_CODE_STRUCT | |||
2755 | && TYPE_CODE (vtype)(vtype)->main_type->code != TYPE_CODE_ARRAY)) | |||
2756 | { | |||
2757 | CORE_ADDR vaddr; | |||
2758 | ||||
2759 | vaddr = VALUE_ADDRESS (v)(v)->location.address + VALUE_OFFSET (v)(v)->offset; | |||
2760 | /* Exact match not required. Within range is | |||
2761 | sufficient. */ | |||
2762 | if (addr >= vaddr && | |||
2763 | addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v))((v)->type)->length) | |||
2764 | found = 1; | |||
2765 | } | |||
2766 | } | |||
2767 | } | |||
2768 | if (found) | |||
2769 | { | |||
2770 | char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n", | |||
2771 | b->number); | |||
2772 | struct cleanup *cleanups = make_cleanup (xfree, message); | |||
2773 | int e = catch_errors (watchpoint_check, bs, message, | |||
2774 | RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
2775 | do_cleanups (cleanups); | |||
2776 | switch (e) | |||
2777 | { | |||
2778 | case WP_DELETED1: | |||
2779 | /* We've already printed what needs to be printed. */ | |||
2780 | bs->print_it = print_it_done; | |||
2781 | /* Stop. */ | |||
2782 | break; | |||
2783 | case WP_VALUE_CHANGED2: | |||
2784 | if (b->type == bp_read_watchpoint) | |||
2785 | { | |||
2786 | /* Don't stop: read watchpoints shouldn't fire if | |||
2787 | the value has changed. This is for targets | |||
2788 | which cannot set read-only watchpoints. */ | |||
2789 | bs->print_it = print_it_noop; | |||
2790 | bs->stop = 0; | |||
2791 | continue; | |||
2792 | } | |||
2793 | ++(b->hit_count); | |||
2794 | break; | |||
2795 | case WP_VALUE_NOT_CHANGED3: | |||
2796 | /* Stop. */ | |||
2797 | ++(b->hit_count); | |||
2798 | break; | |||
2799 | default: | |||
2800 | /* Can't happen. */ | |||
2801 | case 0: | |||
2802 | /* Error from catch_errors. */ | |||
2803 | printf_filtered ("Watchpoint %d deleted.\n", b->number); | |||
2804 | if (b->related_breakpoint) | |||
2805 | b->related_breakpoint->disposition = disp_del_at_next_stop; | |||
2806 | b->disposition = disp_del_at_next_stop; | |||
2807 | /* We've already printed what needs to be printed. */ | |||
2808 | bs->print_it = print_it_done; | |||
2809 | break; | |||
2810 | } | |||
2811 | } | |||
2812 | else /* found == 0 */ | |||
2813 | { | |||
2814 | /* This is a case where some watchpoint(s) triggered, | |||
2815 | but not at the address of this watchpoint (FOUND | |||
2816 | was left zero). So don't print anything for this | |||
2817 | watchpoint. */ | |||
2818 | bs->print_it = print_it_noop; | |||
2819 | bs->stop = 0; | |||
2820 | continue; | |||
2821 | } | |||
2822 | } | |||
2823 | else | |||
2824 | { | |||
2825 | /* By definition, an encountered breakpoint is a triggered | |||
2826 | breakpoint. */ | |||
2827 | ++(b->hit_count); | |||
2828 | ||||
2829 | real_breakpoint = 1; | |||
2830 | } | |||
2831 | ||||
2832 | if (frame_id_p (b->frame_id) | |||
2833 | && !frame_id_eq (b->frame_id, get_frame_id (get_current_frame ()))) | |||
2834 | bs->stop = 0; | |||
2835 | else | |||
2836 | { | |||
2837 | int value_is_zero = 0; | |||
2838 | ||||
2839 | if (b->cond) | |||
2840 | { | |||
2841 | /* Need to select the frame, with all that implies | |||
2842 | so that the conditions will have the right context. */ | |||
2843 | select_frame (get_current_frame ()); | |||
2844 | value_is_zero | |||
2845 | = catch_errors (breakpoint_cond_eval, (b->cond), | |||
2846 | "Error in testing breakpoint condition:\n", | |||
2847 | RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
2848 | /* FIXME-someday, should give breakpoint # */ | |||
2849 | free_all_values (); | |||
2850 | } | |||
2851 | if (b->cond && value_is_zero) | |||
2852 | { | |||
2853 | bs->stop = 0; | |||
2854 | /* Don't consider this a hit. */ | |||
2855 | --(b->hit_count); | |||
2856 | } | |||
2857 | else if (b->thread != -1 && b->thread != thread_id) | |||
2858 | { | |||
2859 | bs->stop = 0; | |||
2860 | /* Don't consider this a hit. */ | |||
2861 | --(b->hit_count); | |||
2862 | } | |||
2863 | else if (b->ignore_count > 0) | |||
2864 | { | |||
2865 | b->ignore_count--; | |||
2866 | annotate_ignore_count_change (); | |||
2867 | bs->stop = 0; | |||
2868 | } | |||
2869 | else | |||
2870 | { | |||
2871 | /* We will stop here */ | |||
2872 | if (b->disposition == disp_disable) | |||
2873 | b->enable_state = bp_disabled; | |||
2874 | if (b->silent) | |||
2875 | bs->print = 0; | |||
2876 | bs->commands = b->commands; | |||
2877 | if (bs->commands && | |||
2878 | (strcmp ("silent", bs->commands->line) == 0 | |||
2879 | || (xdb_commands && strcmp ("Q", bs->commands->line) == 0))) | |||
2880 | { | |||
2881 | bs->commands = bs->commands->next; | |||
2882 | bs->print = 0; | |||
2883 | } | |||
2884 | bs->commands = copy_command_lines (bs->commands); | |||
2885 | } | |||
2886 | } | |||
2887 | /* Print nothing for this entry if we dont stop or if we dont print. */ | |||
2888 | if (bs->stop == 0 || bs->print == 0) | |||
2889 | bs->print_it = print_it_noop; | |||
2890 | } | |||
2891 | ||||
2892 | bs->next = NULL((void*)0); /* Terminate the chain */ | |||
2893 | bs = root_bs->next; /* Re-grab the head of the chain */ | |||
2894 | ||||
2895 | /* The value of a hardware watchpoint hasn't changed, but the | |||
2896 | intermediate memory locations we are watching may have. */ | |||
2897 | if (bs && !bs->stop && | |||
2898 | (bs->breakpoint_at->type == bp_hardware_watchpoint || | |||
2899 | bs->breakpoint_at->type == bp_read_watchpoint || | |||
2900 | bs->breakpoint_at->type == bp_access_watchpoint)) | |||
2901 | { | |||
2902 | remove_breakpoints (); | |||
2903 | insert_breakpoints (); | |||
2904 | } | |||
2905 | return bs; | |||
2906 | } | |||
2907 | ||||
2908 | /* Tell what to do about this bpstat. */ | |||
2909 | struct bpstat_what | |||
2910 | bpstat_what (bpstat bs) | |||
2911 | { | |||
2912 | /* Classify each bpstat as one of the following. */ | |||
2913 | enum class | |||
2914 | { | |||
2915 | /* This bpstat element has no effect on the main_action. */ | |||
2916 | no_effect = 0, | |||
2917 | ||||
2918 | /* There was a watchpoint, stop but don't print. */ | |||
2919 | wp_silent, | |||
2920 | ||||
2921 | /* There was a watchpoint, stop and print. */ | |||
2922 | wp_noisy, | |||
2923 | ||||
2924 | /* There was a breakpoint but we're not stopping. */ | |||
2925 | bp_nostop, | |||
2926 | ||||
2927 | /* There was a breakpoint, stop but don't print. */ | |||
2928 | bp_silent, | |||
2929 | ||||
2930 | /* There was a breakpoint, stop and print. */ | |||
2931 | bp_noisy, | |||
2932 | ||||
2933 | /* We hit the longjmp breakpoint. */ | |||
2934 | long_jump, | |||
2935 | ||||
2936 | /* We hit the longjmp_resume breakpoint. */ | |||
2937 | long_resume, | |||
2938 | ||||
2939 | /* We hit the step_resume breakpoint. */ | |||
2940 | step_resume, | |||
2941 | ||||
2942 | /* We hit the through_sigtramp breakpoint. */ | |||
2943 | through_sig, | |||
2944 | ||||
2945 | /* We hit the shared library event breakpoint. */ | |||
2946 | shlib_event, | |||
2947 | ||||
2948 | /* We caught a shared library event. */ | |||
2949 | catch_shlib_event, | |||
2950 | ||||
2951 | /* This is just used to count how many enums there are. */ | |||
2952 | class_last | |||
2953 | }; | |||
2954 | ||||
2955 | /* Here is the table which drives this routine. So that we can | |||
2956 | format it pretty, we define some abbreviations for the | |||
2957 | enum bpstat_what codes. */ | |||
2958 | #define kc BPSTAT_WHAT_KEEP_CHECKING | |||
2959 | #define ss BPSTAT_WHAT_STOP_SILENT | |||
2960 | #define sn BPSTAT_WHAT_STOP_NOISY | |||
2961 | #define sgl BPSTAT_WHAT_SINGLE | |||
2962 | #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME | |||
2963 | #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME | |||
2964 | #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE | |||
2965 | #define sr BPSTAT_WHAT_STEP_RESUME | |||
2966 | #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP | |||
2967 | #define shl BPSTAT_WHAT_CHECK_SHLIBS | |||
2968 | #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK | |||
2969 | ||||
2970 | /* "Can't happen." Might want to print an error message. | |||
2971 | abort() is not out of the question, but chances are GDB is just | |||
2972 | a bit confused, not unusable. */ | |||
2973 | #define err BPSTAT_WHAT_STOP_NOISY | |||
2974 | ||||
2975 | /* Given an old action and a class, come up with a new action. */ | |||
2976 | /* One interesting property of this table is that wp_silent is the same | |||
2977 | as bp_silent and wp_noisy is the same as bp_noisy. That is because | |||
2978 | after stopping, the check for whether to step over a breakpoint | |||
2979 | (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without | |||
2980 | reference to how we stopped. We retain separate wp_silent and | |||
2981 | bp_silent codes in case we want to change that someday. | |||
2982 | ||||
2983 | Another possibly interesting property of this table is that | |||
2984 | there's a partial ordering, priority-like, of the actions. Once | |||
2985 | you've decided that some action is appropriate, you'll never go | |||
2986 | back and decide something of a lower priority is better. The | |||
2987 | ordering is: | |||
2988 | ||||
2989 | kc < clr sgl shl shlr slr sn sr ss ts | |||
2990 | sgl < clrs shl shlr slr sn sr ss ts | |||
2991 | slr < err shl shlr sn sr ss ts | |||
2992 | clr < clrs err shl shlr sn sr ss ts | |||
2993 | clrs < err shl shlr sn sr ss ts | |||
2994 | ss < shl shlr sn sr ts | |||
2995 | sn < shl shlr sr ts | |||
2996 | sr < shl shlr ts | |||
2997 | shl < shlr | |||
2998 | ts < | |||
2999 | shlr < | |||
3000 | ||||
3001 | What I think this means is that we don't need a damned table | |||
3002 | here. If you just put the rows and columns in the right order, | |||
3003 | it'd look awfully regular. We could simply walk the bpstat list | |||
3004 | and choose the highest priority action we find, with a little | |||
3005 | logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/ | |||
3006 | CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says | |||
3007 | is messy anyway). */ | |||
3008 | ||||
3009 | /* step_resume entries: a step resume breakpoint overrides another | |||
3010 | breakpoint of signal handling (see comment in wait_for_inferior | |||
3011 | at where we set the step_resume breakpoint). */ | |||
3012 | /* We handle the through_sigtramp_breakpoint the same way; having both | |||
3013 | one of those and a step_resume_breakpoint is probably very rare (?). */ | |||
3014 | ||||
3015 | static const enum bpstat_what_main_action | |||
3016 | table[(int) class_last][(int) BPSTAT_WHAT_LAST] = | |||
3017 | { | |||
3018 | /* old action */ | |||
3019 | /* kc ss sn sgl slr clr clrs sr ts shl shlr | |||
3020 | */ | |||
3021 | /*no_effect */ | |||
3022 | {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr}, | |||
3023 | /*wp_silent */ | |||
3024 | {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr}, | |||
3025 | /*wp_noisy */ | |||
3026 | {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr}, | |||
3027 | /*bp_nostop */ | |||
3028 | {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr}, | |||
3029 | /*bp_silent */ | |||
3030 | {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr}, | |||
3031 | /*bp_noisy */ | |||
3032 | {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr}, | |||
3033 | /*long_jump */ | |||
3034 | {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr}, | |||
3035 | /*long_resume */ | |||
3036 | {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr}, | |||
3037 | /*step_resume */ | |||
3038 | {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr}, | |||
3039 | /*through_sig */ | |||
3040 | {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr}, | |||
3041 | /*shlib */ | |||
3042 | {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr}, | |||
3043 | /*catch_shlib */ | |||
3044 | {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr} | |||
3045 | }; | |||
3046 | ||||
3047 | #undef kc | |||
3048 | #undef ss | |||
3049 | #undef sn | |||
3050 | #undef sgl | |||
3051 | #undef slr | |||
3052 | #undef clr | |||
3053 | #undef clrs | |||
3054 | #undef err | |||
3055 | #undef sr | |||
3056 | #undef ts | |||
3057 | #undef shl | |||
3058 | #undef shlr | |||
3059 | enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; | |||
3060 | struct bpstat_what retval; | |||
3061 | ||||
3062 | retval.call_dummy = 0; | |||
3063 | for (; bs != NULL((void*)0); bs = bs->next) | |||
3064 | { | |||
3065 | enum class bs_class = no_effect; | |||
3066 | if (bs->breakpoint_at == NULL((void*)0)) | |||
3067 | /* I suspect this can happen if it was a momentary breakpoint | |||
3068 | which has since been deleted. */ | |||
3069 | continue; | |||
3070 | switch (bs->breakpoint_at->type) | |||
3071 | { | |||
3072 | case bp_none: | |||
3073 | continue; | |||
3074 | ||||
3075 | case bp_breakpoint: | |||
3076 | case bp_hardware_breakpoint: | |||
3077 | case bp_until: | |||
3078 | case bp_finish: | |||
3079 | if (bs->stop) | |||
3080 | { | |||
3081 | if (bs->print) | |||
3082 | bs_class = bp_noisy; | |||
3083 | else | |||
3084 | bs_class = bp_silent; | |||
3085 | } | |||
3086 | else | |||
3087 | bs_class = bp_nostop; | |||
3088 | break; | |||
3089 | case bp_watchpoint: | |||
3090 | case bp_hardware_watchpoint: | |||
3091 | case bp_read_watchpoint: | |||
3092 | case bp_access_watchpoint: | |||
3093 | if (bs->stop) | |||
3094 | { | |||
3095 | if (bs->print) | |||
3096 | bs_class = wp_noisy; | |||
3097 | else | |||
3098 | bs_class = wp_silent; | |||
3099 | } | |||
3100 | else | |||
3101 | /* There was a watchpoint, but we're not stopping. | |||
3102 | This requires no further action. */ | |||
3103 | bs_class = no_effect; | |||
3104 | break; | |||
3105 | case bp_longjmp: | |||
3106 | bs_class = long_jump; | |||
3107 | break; | |||
3108 | case bp_longjmp_resume: | |||
3109 | bs_class = long_resume; | |||
3110 | break; | |||
3111 | case bp_step_resume: | |||
3112 | if (bs->stop) | |||
3113 | { | |||
3114 | bs_class = step_resume; | |||
3115 | } | |||
3116 | else | |||
3117 | /* It is for the wrong frame. */ | |||
3118 | bs_class = bp_nostop; | |||
3119 | break; | |||
3120 | case bp_through_sigtramp: | |||
3121 | bs_class = through_sig; | |||
3122 | break; | |||
3123 | case bp_watchpoint_scope: | |||
3124 | bs_class = bp_nostop; | |||
3125 | break; | |||
3126 | case bp_shlib_event: | |||
3127 | bs_class = shlib_event; | |||
3128 | break; | |||
3129 | case bp_thread_event: | |||
3130 | case bp_overlay_event: | |||
3131 | bs_class = bp_nostop; | |||
3132 | break; | |||
3133 | case bp_catch_load: | |||
3134 | case bp_catch_unload: | |||
3135 | /* Only if this catchpoint triggered should we cause the | |||
3136 | step-out-of-dld behaviour. Otherwise, we ignore this | |||
3137 | catchpoint. */ | |||
3138 | if (bs->stop) | |||
3139 | bs_class = catch_shlib_event; | |||
3140 | else | |||
3141 | bs_class = no_effect; | |||
3142 | break; | |||
3143 | case bp_catch_fork: | |||
3144 | case bp_catch_vfork: | |||
3145 | case bp_catch_exec: | |||
3146 | if (bs->stop) | |||
3147 | { | |||
3148 | if (bs->print) | |||
3149 | bs_class = bp_noisy; | |||
3150 | else | |||
3151 | bs_class = bp_silent; | |||
3152 | } | |||
3153 | else | |||
3154 | /* There was a catchpoint, but we're not stopping. | |||
3155 | This requires no further action. */ | |||
3156 | bs_class = no_effect; | |||
3157 | break; | |||
3158 | case bp_catch_catch: | |||
3159 | if (!bs->stop || CURRENT_EXCEPTION_KIND(current_exception_event->kind) != EX_EVENT_CATCH) | |||
3160 | bs_class = bp_nostop; | |||
3161 | else if (bs->stop) | |||
3162 | bs_class = bs->print ? bp_noisy : bp_silent; | |||
3163 | break; | |||
3164 | case bp_catch_throw: | |||
3165 | if (!bs->stop || CURRENT_EXCEPTION_KIND(current_exception_event->kind) != EX_EVENT_THROW) | |||
3166 | bs_class = bp_nostop; | |||
3167 | else if (bs->stop) | |||
3168 | bs_class = bs->print ? bp_noisy : bp_silent; | |||
3169 | break; | |||
3170 | case bp_call_dummy: | |||
3171 | /* Make sure the action is stop (silent or noisy), | |||
3172 | so infrun.c pops the dummy frame. */ | |||
3173 | bs_class = bp_silent; | |||
3174 | retval.call_dummy = 1; | |||
3175 | break; | |||
3176 | } | |||
3177 | current_action = table[(int) bs_class][(int) current_action]; | |||
3178 | } | |||
3179 | retval.main_action = current_action; | |||
3180 | return retval; | |||
3181 | } | |||
3182 | ||||
3183 | /* Nonzero if we should step constantly (e.g. watchpoints on machines | |||
3184 | without hardware support). This isn't related to a specific bpstat, | |||
3185 | just to things like whether watchpoints are set. */ | |||
3186 | ||||
3187 | int | |||
3188 | bpstat_should_step (void) | |||
3189 | { | |||
3190 | struct breakpoint *b; | |||
3191 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
3192 | if (breakpoint_enabled (b) && b->type == bp_watchpoint) | |||
3193 | return 1; | |||
3194 | return 0; | |||
3195 | } | |||
3196 | ||||
3197 | /* Nonzero if there are enabled hardware watchpoints. */ | |||
3198 | int | |||
3199 | bpstat_have_active_hw_watchpoints (void) | |||
3200 | { | |||
3201 | struct bp_location *bpt; | |||
3202 | ALL_BP_LOCATIONS (bpt)for (bpt = bp_location_chain; bpt; bpt = bpt->next) | |||
3203 | if (breakpoint_enabled (bpt->owner) | |||
3204 | && bpt->inserted | |||
3205 | && bpt->loc_type == bp_loc_hardware_watchpoint) | |||
3206 | return 1; | |||
3207 | return 0; | |||
3208 | } | |||
3209 | ||||
3210 | ||||
3211 | /* Given a bpstat that records zero or more triggered eventpoints, this | |||
3212 | function returns another bpstat which contains only the catchpoints | |||
3213 | on that first list, if any. */ | |||
3214 | void | |||
3215 | bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list) | |||
3216 | { | |||
3217 | struct bpstats root_bs[1]; | |||
3218 | bpstat bs = root_bs; | |||
3219 | struct breakpoint *ep; | |||
3220 | char *dll_pathname; | |||
3221 | ||||
3222 | bpstat_clear (cp_list); | |||
3223 | root_bs->next = NULL((void*)0); | |||
3224 | ||||
3225 | for (; ep_list != NULL((void*)0); ep_list = ep_list->next) | |||
3226 | { | |||
3227 | /* Is this eventpoint a catchpoint? If not, ignore it. */ | |||
3228 | ep = ep_list->breakpoint_at; | |||
3229 | if (ep == NULL((void*)0)) | |||
3230 | break; | |||
3231 | if ((ep->type != bp_catch_load) && | |||
3232 | (ep->type != bp_catch_unload) && | |||
3233 | (ep->type != bp_catch_catch) && | |||
3234 | (ep->type != bp_catch_throw)) | |||
3235 | /* pai: (temp) ADD fork/vfork here!! */ | |||
3236 | continue; | |||
3237 | ||||
3238 | /* Yes; add it to the list. */ | |||
3239 | bs = bpstat_alloc (ep, bs); | |||
3240 | *bs = *ep_list; | |||
3241 | bs->next = NULL((void*)0); | |||
3242 | bs = root_bs->next; | |||
3243 | ||||
3244 | #if defined(SOLIB_ADD) | |||
3245 | /* Also, for each triggered catchpoint, tag it with the name of | |||
3246 | the library that caused this trigger. (We copy the name now, | |||
3247 | because it's only guaranteed to be available NOW, when the | |||
3248 | catchpoint triggers. Clients who may wish to know the name | |||
3249 | later must get it from the catchpoint itself.) */ | |||
3250 | if (ep->triggered_dll_pathname != NULL((void*)0)) | |||
3251 | xfree (ep->triggered_dll_pathname); | |||
3252 | if (ep->type == bp_catch_load) | |||
3253 | dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME ("" | |||
3254 | PIDGET (inferior_ptid))""; | |||
3255 | else | |||
3256 | dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME ("" | |||
3257 | PIDGET (inferior_ptid))""; | |||
3258 | #else | |||
3259 | dll_pathname = NULL((void*)0); | |||
3260 | #endif | |||
3261 | if (dll_pathname) | |||
3262 | { | |||
3263 | ep->triggered_dll_pathname = (char *) | |||
3264 | xmalloc (strlen (dll_pathname) + 1); | |||
3265 | strcpy (ep->triggered_dll_pathname, dll_pathname); | |||
3266 | } | |||
3267 | else | |||
3268 | ep->triggered_dll_pathname = NULL((void*)0); | |||
3269 | } | |||
3270 | ||||
3271 | *cp_list = bs; | |||
3272 | } | |||
3273 | ||||
3274 | /* Print B to gdb_stdout. */ | |||
3275 | static void | |||
3276 | print_one_breakpoint (struct breakpoint *b, | |||
3277 | CORE_ADDR *last_addr) | |||
3278 | { | |||
3279 | struct command_line *l; | |||
3280 | struct symbol *sym; | |||
3281 | struct ep_type_description | |||
3282 | { | |||
3283 | enum bptype type; | |||
3284 | char *description; | |||
3285 | }; | |||
3286 | static struct ep_type_description bptypes[] = | |||
3287 | { | |||
3288 | {bp_none, "?deleted?"}, | |||
3289 | {bp_breakpoint, "breakpoint"}, | |||
3290 | {bp_hardware_breakpoint, "hw breakpoint"}, | |||
3291 | {bp_until, "until"}, | |||
3292 | {bp_finish, "finish"}, | |||
3293 | {bp_watchpoint, "watchpoint"}, | |||
3294 | {bp_hardware_watchpoint, "hw watchpoint"}, | |||
3295 | {bp_read_watchpoint, "read watchpoint"}, | |||
3296 | {bp_access_watchpoint, "acc watchpoint"}, | |||
3297 | {bp_longjmp, "longjmp"}, | |||
3298 | {bp_longjmp_resume, "longjmp resume"}, | |||
3299 | {bp_step_resume, "step resume"}, | |||
3300 | {bp_through_sigtramp, "sigtramp"}, | |||
3301 | {bp_watchpoint_scope, "watchpoint scope"}, | |||
3302 | {bp_call_dummy, "call dummy"}, | |||
3303 | {bp_shlib_event, "shlib events"}, | |||
3304 | {bp_thread_event, "thread events"}, | |||
3305 | {bp_overlay_event, "overlay events"}, | |||
3306 | {bp_catch_load, "catch load"}, | |||
3307 | {bp_catch_unload, "catch unload"}, | |||
3308 | {bp_catch_fork, "catch fork"}, | |||
3309 | {bp_catch_vfork, "catch vfork"}, | |||
3310 | {bp_catch_exec, "catch exec"}, | |||
3311 | {bp_catch_catch, "catch catch"}, | |||
3312 | {bp_catch_throw, "catch throw"} | |||
3313 | }; | |||
3314 | ||||
3315 | static char *bpdisps[] = | |||
3316 | {"del", "dstp", "dis", "keep"}; | |||
3317 | static char bpenables[] = "nynny"; | |||
3318 | char wrap_indent[80]; | |||
3319 | struct ui_stream *stb = ui_out_stream_new (uiout); | |||
3320 | struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb); | |||
3321 | struct cleanup *bkpt_chain; | |||
3322 | ||||
3323 | annotate_record (); | |||
3324 | bkpt_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "bkpt"); | |||
3325 | ||||
3326 | /* 1 */ | |||
3327 | annotate_field (0); | |||
3328 | ui_out_field_int (uiout, "number", b->number); | |||
3329 | ||||
3330 | /* 2 */ | |||
3331 | annotate_field (1); | |||
3332 | if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0]))) | |||
3333 | || ((int) b->type != bptypes[(int) b->type].type)) | |||
3334 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__3334, | |||
3335 | "bptypes table does not describe type #%d.", | |||
3336 | (int) b->type); | |||
3337 | ui_out_field_string (uiout, "type", bptypes[(int) b->type].description); | |||
3338 | ||||
3339 | /* 3 */ | |||
3340 | annotate_field (2); | |||
3341 | ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]); | |||
3342 | ||||
3343 | /* 4 */ | |||
3344 | annotate_field (3); | |||
3345 | ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable_state]); | |||
3346 | ui_out_spaces (uiout, 2); | |||
3347 | ||||
3348 | /* 5 and 6 */ | |||
3349 | strcpy (wrap_indent, " "); | |||
3350 | if (addressprint) | |||
3351 | { | |||
3352 | if (TARGET_ADDR_BIT(gdbarch_addr_bit (current_gdbarch)) <= 32) | |||
3353 | strcat (wrap_indent, " "); | |||
3354 | else | |||
3355 | strcat (wrap_indent, " "); | |||
3356 | } | |||
3357 | ||||
3358 | if (b->ops != NULL((void*)0) && b->ops->print_one != NULL((void*)0)) | |||
3359 | b->ops->print_one (b, last_addr); | |||
3360 | else | |||
3361 | switch (b->type) | |||
3362 | { | |||
3363 | case bp_none: | |||
3364 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__3364, | |||
3365 | "print_one_breakpoint: bp_none encountered\n"); | |||
3366 | break; | |||
3367 | ||||
3368 | case bp_watchpoint: | |||
3369 | case bp_hardware_watchpoint: | |||
3370 | case bp_read_watchpoint: | |||
3371 | case bp_access_watchpoint: | |||
3372 | /* Field 4, the address, is omitted (which makes the columns | |||
3373 | not line up too nicely with the headers, but the effect | |||
3374 | is relatively readable). */ | |||
3375 | if (addressprint) | |||
3376 | ui_out_field_skip (uiout, "addr"); | |||
3377 | annotate_field (5); | |||
3378 | print_expression (b->exp, stb->stream); | |||
3379 | ui_out_field_stream (uiout, "what", stb); | |||
3380 | break; | |||
3381 | ||||
3382 | case bp_catch_load: | |||
3383 | case bp_catch_unload: | |||
3384 | /* Field 4, the address, is omitted (which makes the columns | |||
3385 | not line up too nicely with the headers, but the effect | |||
3386 | is relatively readable). */ | |||
3387 | if (addressprint) | |||
3388 | ui_out_field_skip (uiout, "addr"); | |||
3389 | annotate_field (5); | |||
3390 | if (b->dll_pathname == NULL((void*)0)) | |||
3391 | { | |||
3392 | ui_out_field_string (uiout, "what", "<any library>"); | |||
3393 | ui_out_spaces (uiout, 1); | |||
3394 | } | |||
3395 | else | |||
3396 | { | |||
3397 | ui_out_text (uiout, "library \""); | |||
3398 | ui_out_field_string (uiout, "what", b->dll_pathname); | |||
3399 | ui_out_text (uiout, "\" "); | |||
3400 | } | |||
3401 | break; | |||
3402 | ||||
3403 | case bp_catch_fork: | |||
3404 | case bp_catch_vfork: | |||
3405 | /* Field 4, the address, is omitted (which makes the columns | |||
3406 | not line up too nicely with the headers, but the effect | |||
3407 | is relatively readable). */ | |||
3408 | if (addressprint) | |||
3409 | ui_out_field_skip (uiout, "addr"); | |||
3410 | annotate_field (5); | |||
3411 | if (b->forked_inferior_pid != 0) | |||
3412 | { | |||
3413 | ui_out_text (uiout, "process "); | |||
3414 | ui_out_field_int (uiout, "what", b->forked_inferior_pid); | |||
3415 | ui_out_spaces (uiout, 1); | |||
3416 | } | |||
3417 | ||||
3418 | case bp_catch_exec: | |||
3419 | /* Field 4, the address, is omitted (which makes the columns | |||
3420 | not line up too nicely with the headers, but the effect | |||
3421 | is relatively readable). */ | |||
3422 | if (addressprint) | |||
3423 | ui_out_field_skip (uiout, "addr"); | |||
3424 | annotate_field (5); | |||
3425 | if (b->exec_pathname != NULL((void*)0)) | |||
3426 | { | |||
3427 | ui_out_text (uiout, "program \""); | |||
3428 | ui_out_field_string (uiout, "what", b->exec_pathname); | |||
3429 | ui_out_text (uiout, "\" "); | |||
3430 | } | |||
3431 | break; | |||
3432 | ||||
3433 | case bp_catch_catch: | |||
3434 | /* Field 4, the address, is omitted (which makes the columns | |||
3435 | not line up too nicely with the headers, but the effect | |||
3436 | is relatively readable). */ | |||
3437 | if (addressprint) | |||
3438 | ui_out_field_skip (uiout, "addr"); | |||
3439 | annotate_field (5); | |||
3440 | ui_out_field_string (uiout, "what", "exception catch"); | |||
3441 | ui_out_spaces (uiout, 1); | |||
3442 | break; | |||
3443 | ||||
3444 | case bp_catch_throw: | |||
3445 | /* Field 4, the address, is omitted (which makes the columns | |||
3446 | not line up too nicely with the headers, but the effect | |||
3447 | is relatively readable). */ | |||
3448 | if (addressprint) | |||
3449 | ui_out_field_skip (uiout, "addr"); | |||
3450 | annotate_field (5); | |||
3451 | ui_out_field_string (uiout, "what", "exception throw"); | |||
3452 | ui_out_spaces (uiout, 1); | |||
3453 | break; | |||
3454 | ||||
3455 | case bp_breakpoint: | |||
3456 | case bp_hardware_breakpoint: | |||
3457 | case bp_until: | |||
3458 | case bp_finish: | |||
3459 | case bp_longjmp: | |||
3460 | case bp_longjmp_resume: | |||
3461 | case bp_step_resume: | |||
3462 | case bp_through_sigtramp: | |||
3463 | case bp_watchpoint_scope: | |||
3464 | case bp_call_dummy: | |||
3465 | case bp_shlib_event: | |||
3466 | case bp_thread_event: | |||
3467 | case bp_overlay_event: | |||
3468 | if (addressprint) | |||
3469 | { | |||
3470 | annotate_field (4); | |||
3471 | if (b->pending) | |||
3472 | ui_out_field_string (uiout, "addr", "<PENDING>"); | |||
3473 | else | |||
3474 | ui_out_field_core_addr (uiout, "addr", b->loc->address); | |||
3475 | } | |||
3476 | annotate_field (5); | |||
3477 | *last_addr = b->loc->address; | |||
3478 | if (b->source_file) | |||
3479 | { | |||
3480 | sym = find_pc_sect_function (b->loc->address, b->loc->section); | |||
3481 | if (sym) | |||
3482 | { | |||
3483 | ui_out_text (uiout, "in "); | |||
3484 | ui_out_field_string (uiout, "func", | |||
3485 | SYMBOL_PRINT_NAME (sym)(demangle ? (symbol_natural_name (&(sym)->ginfo)) : (sym )->ginfo.name)); | |||
3486 | ui_out_wrap_hint (uiout, wrap_indent); | |||
3487 | ui_out_text (uiout, " at "); | |||
3488 | } | |||
3489 | ui_out_field_string (uiout, "file", b->source_file); | |||
3490 | ui_out_text (uiout, ":"); | |||
3491 | ui_out_field_int (uiout, "line", b->line_number); | |||
3492 | } | |||
3493 | else if (b->pending) | |||
3494 | { | |||
3495 | ui_out_field_string (uiout, "pending", b->addr_string); | |||
3496 | } | |||
3497 | else | |||
3498 | { | |||
3499 | print_address_symbolic (b->loc->address, stb->stream, demangle, ""); | |||
3500 | ui_out_field_stream (uiout, "at", stb); | |||
3501 | } | |||
3502 | break; | |||
3503 | } | |||
3504 | ||||
3505 | if (b->thread != -1) | |||
3506 | { | |||
3507 | /* FIXME: This seems to be redundant and lost here; see the | |||
3508 | "stop only in" line a little further down. */ | |||
3509 | ui_out_text (uiout, " thread "); | |||
3510 | ui_out_field_int (uiout, "thread", b->thread); | |||
3511 | } | |||
3512 | ||||
3513 | ui_out_text (uiout, "\n"); | |||
3514 | ||||
3515 | if (frame_id_p (b->frame_id)) | |||
3516 | { | |||
3517 | annotate_field (6); | |||
3518 | ui_out_text (uiout, "\tstop only in stack frame at "); | |||
3519 | /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside | |||
3520 | the frame ID. */ | |||
3521 | ui_out_field_core_addr (uiout, "frame", b->frame_id.stack_addr); | |||
3522 | ui_out_text (uiout, "\n"); | |||
3523 | } | |||
3524 | ||||
3525 | if (b->cond) | |||
3526 | { | |||
3527 | annotate_field (7); | |||
3528 | ui_out_text (uiout, "\tstop only if "); | |||
3529 | print_expression (b->cond, stb->stream); | |||
3530 | ui_out_field_stream (uiout, "cond", stb); | |||
3531 | ui_out_text (uiout, "\n"); | |||
3532 | } | |||
3533 | ||||
3534 | if (b->pending && b->cond_string) | |||
3535 | { | |||
3536 | annotate_field (7); | |||
3537 | ui_out_text (uiout, "\tstop only if "); | |||
3538 | ui_out_field_string (uiout, "cond", b->cond_string); | |||
3539 | ui_out_text (uiout, "\n"); | |||
3540 | } | |||
3541 | ||||
3542 | if (b->thread != -1) | |||
3543 | { | |||
3544 | /* FIXME should make an annotation for this */ | |||
3545 | ui_out_text (uiout, "\tstop only in thread "); | |||
3546 | ui_out_field_int (uiout, "thread", b->thread); | |||
3547 | ui_out_text (uiout, "\n"); | |||
3548 | } | |||
3549 | ||||
3550 | if (show_breakpoint_hit_counts && b->hit_count) | |||
3551 | { | |||
3552 | /* FIXME should make an annotation for this */ | |||
3553 | if (ep_is_catchpoint (b)) | |||
3554 | ui_out_text (uiout, "\tcatchpoint"); | |||
3555 | else | |||
3556 | ui_out_text (uiout, "\tbreakpoint"); | |||
3557 | ui_out_text (uiout, " already hit "); | |||
3558 | ui_out_field_int (uiout, "times", b->hit_count); | |||
3559 | if (b->hit_count == 1) | |||
3560 | ui_out_text (uiout, " time\n"); | |||
3561 | else | |||
3562 | ui_out_text (uiout, " times\n"); | |||
3563 | } | |||
3564 | ||||
3565 | /* Output the count also if it is zero, but only if this is | |||
3566 | mi. FIXME: Should have a better test for this. */ | |||
3567 | if (ui_out_is_mi_like_p (uiout)) | |||
3568 | if (show_breakpoint_hit_counts && b->hit_count == 0) | |||
3569 | ui_out_field_int (uiout, "times", b->hit_count); | |||
3570 | ||||
3571 | if (b->ignore_count) | |||
3572 | { | |||
3573 | annotate_field (8); | |||
3574 | ui_out_text (uiout, "\tignore next "); | |||
3575 | ui_out_field_int (uiout, "ignore", b->ignore_count); | |||
3576 | ui_out_text (uiout, " hits\n"); | |||
3577 | } | |||
3578 | ||||
3579 | if ((l = b->commands)) | |||
3580 | { | |||
3581 | struct cleanup *script_chain; | |||
3582 | ||||
3583 | annotate_field (9); | |||
3584 | script_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "script"); | |||
3585 | print_command_lines (uiout, l, 4); | |||
3586 | do_cleanups (script_chain); | |||
3587 | } | |||
3588 | do_cleanups (bkpt_chain); | |||
3589 | do_cleanups (old_chain); | |||
3590 | } | |||
3591 | ||||
3592 | struct captured_breakpoint_query_args | |||
3593 | { | |||
3594 | int bnum; | |||
3595 | }; | |||
3596 | ||||
3597 | static int | |||
3598 | do_captured_breakpoint_query (struct ui_out *uiout, void *data) | |||
3599 | { | |||
3600 | struct captured_breakpoint_query_args *args = data; | |||
3601 | struct breakpoint *b; | |||
3602 | CORE_ADDR dummy_addr = 0; | |||
3603 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
3604 | { | |||
3605 | if (args->bnum == b->number) | |||
3606 | { | |||
3607 | print_one_breakpoint (b, &dummy_addr); | |||
3608 | return GDB_RC_OK; | |||
3609 | } | |||
3610 | } | |||
3611 | return GDB_RC_NONE; | |||
3612 | } | |||
3613 | ||||
3614 | enum gdb_rc | |||
3615 | gdb_breakpoint_query (struct ui_out *uiout, int bnum) | |||
3616 | { | |||
3617 | struct captured_breakpoint_query_args args; | |||
3618 | args.bnum = bnum; | |||
3619 | /* For the moment we don't trust print_one_breakpoint() to not throw | |||
3620 | an error. */ | |||
3621 | return catch_exceptions (uiout, do_captured_breakpoint_query, &args, | |||
3622 | NULL((void*)0), RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
3623 | } | |||
3624 | ||||
3625 | /* Return non-zero if B is user settable (breakpoints, watchpoints, | |||
3626 | catchpoints, et.al.). */ | |||
3627 | ||||
3628 | static int | |||
3629 | user_settable_breakpoint (const struct breakpoint *b) | |||
3630 | { | |||
3631 | return (b->type == bp_breakpoint | |||
3632 | || b->type == bp_catch_load | |||
3633 | || b->type == bp_catch_unload | |||
3634 | || b->type == bp_catch_fork | |||
3635 | || b->type == bp_catch_vfork | |||
3636 | || b->type == bp_catch_exec | |||
3637 | || b->type == bp_catch_catch | |||
3638 | || b->type == bp_catch_throw | |||
3639 | || b->type == bp_hardware_breakpoint | |||
3640 | || b->type == bp_watchpoint | |||
3641 | || b->type == bp_read_watchpoint | |||
3642 | || b->type == bp_access_watchpoint | |||
3643 | || b->type == bp_hardware_watchpoint); | |||
3644 | } | |||
3645 | ||||
3646 | /* Print information on user settable breakpoint (watchpoint, etc) | |||
3647 | number BNUM. If BNUM is -1 print all user settable breakpoints. | |||
3648 | If ALLFLAG is non-zero, include non- user settable breakpoints. */ | |||
3649 | ||||
3650 | static void | |||
3651 | breakpoint_1 (int bnum, int allflag) | |||
3652 | { | |||
3653 | struct breakpoint *b; | |||
3654 | CORE_ADDR last_addr = (CORE_ADDR) -1; | |||
3655 | int nr_printable_breakpoints; | |||
3656 | struct cleanup *bkpttbl_chain; | |||
3657 | ||||
3658 | /* Compute the number of rows in the table. */ | |||
3659 | nr_printable_breakpoints = 0; | |||
3660 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
3661 | if (bnum == -1 | |||
3662 | || bnum == b->number) | |||
3663 | { | |||
3664 | if (allflag || user_settable_breakpoint (b)) | |||
3665 | nr_printable_breakpoints++; | |||
3666 | } | |||
3667 | ||||
3668 | if (addressprint) | |||
3669 | bkpttbl_chain | |||
3670 | = make_cleanup_ui_out_table_begin_end (uiout, 6, nr_printable_breakpoints, | |||
3671 | "BreakpointTable"); | |||
3672 | else | |||
3673 | bkpttbl_chain | |||
3674 | = make_cleanup_ui_out_table_begin_end (uiout, 5, nr_printable_breakpoints, | |||
3675 | "BreakpointTable"); | |||
3676 | ||||
3677 | if (nr_printable_breakpoints > 0) | |||
3678 | annotate_breakpoints_headers (); | |||
3679 | if (nr_printable_breakpoints > 0) | |||
3680 | annotate_field (0); | |||
3681 | ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */ | |||
3682 | if (nr_printable_breakpoints > 0) | |||
3683 | annotate_field (1); | |||
3684 | ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */ | |||
3685 | if (nr_printable_breakpoints > 0) | |||
3686 | annotate_field (2); | |||
3687 | ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */ | |||
3688 | if (nr_printable_breakpoints > 0) | |||
3689 | annotate_field (3); | |||
3690 | ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */ | |||
3691 | if (addressprint) | |||
3692 | { | |||
3693 | if (nr_printable_breakpoints > 0) | |||
3694 | annotate_field (4); | |||
3695 | if (TARGET_ADDR_BIT(gdbarch_addr_bit (current_gdbarch)) <= 32) | |||
3696 | ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */ | |||
3697 | else | |||
3698 | ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */ | |||
3699 | } | |||
3700 | if (nr_printable_breakpoints > 0) | |||
3701 | annotate_field (5); | |||
3702 | ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */ | |||
3703 | ui_out_table_body (uiout); | |||
3704 | if (nr_printable_breakpoints > 0) | |||
3705 | annotate_breakpoints_table (); | |||
3706 | ||||
3707 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
3708 | if (bnum == -1 | |||
3709 | || bnum == b->number) | |||
3710 | { | |||
3711 | /* We only print out user settable breakpoints unless the | |||
3712 | allflag is set. */ | |||
3713 | if (allflag || user_settable_breakpoint (b)) | |||
3714 | print_one_breakpoint (b, &last_addr); | |||
3715 | } | |||
3716 | ||||
3717 | do_cleanups (bkpttbl_chain); | |||
3718 | ||||
3719 | if (nr_printable_breakpoints == 0) | |||
3720 | { | |||
3721 | if (bnum == -1) | |||
3722 | ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n"); | |||
3723 | else | |||
3724 | ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n", | |||
3725 | bnum); | |||
3726 | } | |||
3727 | else | |||
3728 | { | |||
3729 | /* Compare against (CORE_ADDR)-1 in case some compiler decides | |||
3730 | that a comparison of an unsigned with -1 is always false. */ | |||
3731 | if (last_addr != (CORE_ADDR) -1) | |||
3732 | set_next_address (last_addr); | |||
3733 | } | |||
3734 | ||||
3735 | /* FIXME? Should this be moved up so that it is only called when | |||
3736 | there have been breakpoints? */ | |||
3737 | annotate_breakpoints_table_end (); | |||
3738 | } | |||
3739 | ||||
3740 | static void | |||
3741 | breakpoints_info (char *bnum_exp, int from_tty) | |||
3742 | { | |||
3743 | int bnum = -1; | |||
3744 | ||||
3745 | if (bnum_exp) | |||
3746 | bnum = parse_and_eval_long (bnum_exp); | |||
3747 | ||||
3748 | breakpoint_1 (bnum, 0); | |||
3749 | } | |||
3750 | ||||
3751 | static void | |||
3752 | maintenance_info_breakpoints (char *bnum_exp, int from_tty) | |||
3753 | { | |||
3754 | int bnum = -1; | |||
3755 | ||||
3756 | if (bnum_exp) | |||
3757 | bnum = parse_and_eval_long (bnum_exp); | |||
3758 | ||||
3759 | breakpoint_1 (bnum, 1); | |||
3760 | } | |||
3761 | ||||
3762 | /* Print a message describing any breakpoints set at PC. */ | |||
3763 | ||||
3764 | static void | |||
3765 | describe_other_breakpoints (CORE_ADDR pc, asection *section) | |||
3766 | { | |||
3767 | int others = 0; | |||
3768 | struct breakpoint *b; | |||
3769 | ||||
3770 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
3771 | if (b->loc->address == pc) /* address match / overlay match */ | |||
3772 | if (!b->pending && (!overlay_debugging || b->loc->section == section)) | |||
3773 | others++; | |||
3774 | if (others > 0) | |||
3775 | { | |||
3776 | printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); | |||
3777 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
3778 | if (b->loc->address == pc) /* address match / overlay match */ | |||
3779 | if (!b->pending && (!overlay_debugging || b->loc->section == section)) | |||
3780 | { | |||
3781 | others--; | |||
3782 | printf_filtered ("%d%s%s ", | |||
3783 | b->number, | |||
3784 | ((b->enable_state == bp_disabled || | |||
3785 | b->enable_state == bp_shlib_disabled || | |||
3786 | b->enable_state == bp_startup_disabled || | |||
3787 | b->enable_state == bp_call_disabled) | |||
3788 | ? " (disabled)" | |||
3789 | : b->enable_state == bp_permanent | |||
3790 | ? " (permanent)" | |||
3791 | : ""), | |||
3792 | (others > 1) ? "," | |||
3793 | : ((others == 1) ? " and" : "")); | |||
3794 | } | |||
3795 | printf_filtered ("also set at pc "); | |||
3796 | print_address_numeric (pc, 1, gdb_stdout); | |||
3797 | printf_filtered (".\n"); | |||
3798 | } | |||
3799 | } | |||
3800 | ||||
3801 | /* Set the default place to put a breakpoint | |||
3802 | for the `break' command with no arguments. */ | |||
3803 | ||||
3804 | void | |||
3805 | set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab, | |||
3806 | int line) | |||
3807 | { | |||
3808 | default_breakpoint_valid = valid; | |||
3809 | default_breakpoint_address = addr; | |||
3810 | default_breakpoint_symtab = symtab; | |||
3811 | default_breakpoint_line = line; | |||
3812 | } | |||
3813 | ||||
3814 | /* Return true iff it is meaningful to use the address member of | |||
3815 | BPT. For some breakpoint types, the address member is irrelevant | |||
3816 | and it makes no sense to attempt to compare it to other addresses | |||
3817 | (or use it for any other purpose either). | |||
3818 | ||||
3819 | More specifically, each of the following breakpoint types will always | |||
3820 | have a zero valued address and we don't want check_duplicates() to mark | |||
3821 | breakpoints of any of these types to be a duplicate of an actual | |||
3822 | breakpoint at address zero: | |||
3823 | ||||
3824 | bp_watchpoint | |||
3825 | bp_hardware_watchpoint | |||
3826 | bp_read_watchpoint | |||
3827 | bp_access_watchpoint | |||
3828 | bp_catch_exec | |||
3829 | bp_longjmp_resume | |||
3830 | bp_catch_fork | |||
3831 | bp_catch_vork */ | |||
3832 | ||||
3833 | static int | |||
3834 | breakpoint_address_is_meaningful (struct breakpoint *bpt) | |||
3835 | { | |||
3836 | enum bptype type = bpt->type; | |||
3837 | ||||
3838 | return (type != bp_watchpoint | |||
3839 | && type != bp_hardware_watchpoint | |||
3840 | && type != bp_read_watchpoint | |||
3841 | && type != bp_access_watchpoint | |||
3842 | && type != bp_catch_exec | |||
3843 | && type != bp_longjmp_resume | |||
3844 | && type != bp_catch_fork | |||
3845 | && type != bp_catch_vfork); | |||
3846 | } | |||
3847 | ||||
3848 | /* Rescan breakpoints at the same address and section as BPT, | |||
3849 | marking the first one as "first" and any others as "duplicates". | |||
3850 | This is so that the bpt instruction is only inserted once. | |||
3851 | If we have a permanent breakpoint at the same place as BPT, make | |||
3852 | that one the official one, and the rest as duplicates. */ | |||
3853 | ||||
3854 | static void | |||
3855 | check_duplicates (struct breakpoint *bpt) | |||
3856 | { | |||
3857 | struct bp_location *b; | |||
3858 | int count = 0; | |||
3859 | struct bp_location *perm_bp = 0; | |||
3860 | CORE_ADDR address = bpt->loc->address; | |||
3861 | asection *section = bpt->loc->section; | |||
3862 | ||||
3863 | if (! breakpoint_address_is_meaningful (bpt)) | |||
3864 | return; | |||
3865 | ||||
3866 | ALL_BP_LOCATIONS (b)for (b = bp_location_chain; b; b = b->next) | |||
3867 | if (b->owner->enable_state != bp_disabled | |||
3868 | && b->owner->enable_state != bp_shlib_disabled | |||
3869 | && !b->owner->pending | |||
3870 | && b->owner->enable_state != bp_call_disabled | |||
3871 | && b->address == address /* address / overlay match */ | |||
3872 | && (!overlay_debugging || b->section == section) | |||
3873 | && breakpoint_address_is_meaningful (b->owner)) | |||
3874 | { | |||
3875 | /* Have we found a permanent breakpoint? */ | |||
3876 | if (b->owner->enable_state == bp_permanent) | |||
3877 | { | |||
3878 | perm_bp = b; | |||
3879 | break; | |||
3880 | } | |||
3881 | ||||
3882 | count++; | |||
3883 | b->duplicate = count > 1; | |||
3884 | } | |||
3885 | ||||
3886 | /* If we found a permanent breakpoint at this address, go over the | |||
3887 | list again and declare all the other breakpoints there to be the | |||
3888 | duplicates. */ | |||
3889 | if (perm_bp) | |||
3890 | { | |||
3891 | perm_bp->duplicate = 0; | |||
3892 | ||||
3893 | /* Permanent breakpoint should always be inserted. */ | |||
3894 | if (! perm_bp->inserted) | |||
3895 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__3895, | |||
3896 | "allegedly permanent breakpoint is not " | |||
3897 | "actually inserted"); | |||
3898 | ||||
3899 | ALL_BP_LOCATIONS (b)for (b = bp_location_chain; b; b = b->next) | |||
3900 | if (b != perm_bp) | |||
3901 | { | |||
3902 | if (b->owner->enable_state != bp_disabled | |||
3903 | && b->owner->enable_state != bp_shlib_disabled | |||
3904 | && !b->owner->pending | |||
3905 | && b->owner->enable_state != bp_call_disabled | |||
3906 | && b->address == address /* address / overlay match */ | |||
3907 | && (!overlay_debugging || b->section == section) | |||
3908 | && breakpoint_address_is_meaningful (b->owner)) | |||
3909 | { | |||
3910 | if (b->inserted) | |||
3911 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__3911, | |||
3912 | "another breakpoint was inserted on top of " | |||
3913 | "a permanent breakpoint"); | |||
3914 | ||||
3915 | b->duplicate = 1; | |||
3916 | } | |||
3917 | } | |||
3918 | } | |||
3919 | } | |||
3920 | ||||
3921 | static void | |||
3922 | breakpoint_adjustment_warning (CORE_ADDR from_addr, CORE_ADDR to_addr, | |||
3923 | int bnum, int have_bnum) | |||
3924 | { | |||
3925 | char astr1[40]; | |||
3926 | char astr2[40]; | |||
3927 | ||||
3928 | strcpy (astr1, hex_string_custom ((unsigned long) from_addr, 8)); | |||
3929 | strcpy (astr2, hex_string_custom ((unsigned long) to_addr, 8)); | |||
3930 | if (have_bnum) | |||
3931 | warning ("Breakpoint %d address previously adjusted from %s to %s.", | |||
3932 | bnum, astr1, astr2); | |||
3933 | else | |||
3934 | warning ("Breakpoint address adjusted from %s to %s.", astr1, astr2); | |||
3935 | } | |||
3936 | ||||
3937 | /* Adjust a breakpoint's address to account for architectural constraints | |||
3938 | on breakpoint placement. Return the adjusted address. Note: Very | |||
3939 | few targets require this kind of adjustment. For most targets, | |||
3940 | this function is simply the identity function. */ | |||
3941 | ||||
3942 | static CORE_ADDR | |||
3943 | adjust_breakpoint_address (CORE_ADDR bpaddr, enum bptype bptype) | |||
3944 | { | |||
3945 | if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch)) | |||
3946 | { | |||
3947 | /* Very few targets need any kind of breakpoint adjustment. */ | |||
3948 | return bpaddr; | |||
3949 | } | |||
3950 | else if (bptype == bp_watchpoint | |||
3951 | || bptype == bp_hardware_watchpoint | |||
3952 | || bptype == bp_read_watchpoint | |||
3953 | || bptype == bp_access_watchpoint | |||
3954 | || bptype == bp_catch_fork | |||
3955 | || bptype == bp_catch_vfork | |||
3956 | || bptype == bp_catch_exec) | |||
3957 | { | |||
3958 | /* Watchpoints and the various bp_catch_* eventpoints should not | |||
3959 | have their addresses modified. */ | |||
3960 | return bpaddr; | |||
3961 | } | |||
3962 | else | |||
3963 | { | |||
3964 | CORE_ADDR adjusted_bpaddr; | |||
3965 | ||||
3966 | /* Some targets have architectural constraints on the placement | |||
3967 | of breakpoint instructions. Obtain the adjusted address. */ | |||
3968 | adjusted_bpaddr = gdbarch_adjust_breakpoint_address (current_gdbarch, | |||
3969 | bpaddr); | |||
3970 | ||||
3971 | /* An adjusted breakpoint address can significantly alter | |||
3972 | a user's expectations. Print a warning if an adjustment | |||
3973 | is required. */ | |||
3974 | if (adjusted_bpaddr != bpaddr) | |||
3975 | breakpoint_adjustment_warning (bpaddr, adjusted_bpaddr, 0, 0); | |||
3976 | ||||
3977 | return adjusted_bpaddr; | |||
3978 | } | |||
3979 | } | |||
3980 | ||||
3981 | /* Allocate a struct bp_location. */ | |||
3982 | ||||
3983 | static struct bp_location * | |||
3984 | allocate_bp_location (struct breakpoint *bpt, enum bptype bp_type) | |||
3985 | { | |||
3986 | struct bp_location *loc, *loc_p; | |||
3987 | ||||
3988 | loc = xmalloc (sizeof (struct bp_location)); | |||
3989 | memset (loc, 0, sizeof (*loc)); | |||
3990 | ||||
3991 | loc->owner = bpt; | |||
3992 | ||||
3993 | switch (bp_type) | |||
3994 | { | |||
3995 | case bp_breakpoint: | |||
3996 | case bp_until: | |||
3997 | case bp_finish: | |||
3998 | case bp_longjmp: | |||
3999 | case bp_longjmp_resume: | |||
4000 | case bp_step_resume: | |||
4001 | case bp_through_sigtramp: | |||
4002 | case bp_watchpoint_scope: | |||
4003 | case bp_call_dummy: | |||
4004 | case bp_shlib_event: | |||
4005 | case bp_thread_event: | |||
4006 | case bp_overlay_event: | |||
4007 | case bp_catch_load: | |||
4008 | case bp_catch_unload: | |||
4009 | loc->loc_type = bp_loc_software_breakpoint; | |||
4010 | break; | |||
4011 | case bp_hardware_breakpoint: | |||
4012 | loc->loc_type = bp_loc_hardware_breakpoint; | |||
4013 | break; | |||
4014 | case bp_hardware_watchpoint: | |||
4015 | case bp_read_watchpoint: | |||
4016 | case bp_access_watchpoint: | |||
4017 | loc->loc_type = bp_loc_hardware_watchpoint; | |||
4018 | break; | |||
4019 | case bp_watchpoint: | |||
4020 | case bp_catch_fork: | |||
4021 | case bp_catch_vfork: | |||
4022 | case bp_catch_exec: | |||
4023 | case bp_catch_catch: | |||
4024 | case bp_catch_throw: | |||
4025 | loc->loc_type = bp_loc_other; | |||
4026 | break; | |||
4027 | default: | |||
4028 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__4028, "unknown breakpoint type"); | |||
4029 | } | |||
4030 | ||||
4031 | /* Add this breakpoint to the end of the chain. */ | |||
4032 | ||||
4033 | loc_p = bp_location_chain; | |||
4034 | if (loc_p == 0) | |||
4035 | bp_location_chain = loc; | |||
4036 | else | |||
4037 | { | |||
4038 | while (loc_p->next) | |||
4039 | loc_p = loc_p->next; | |||
4040 | loc_p->next = loc; | |||
4041 | } | |||
4042 | ||||
4043 | return loc; | |||
4044 | } | |||
4045 | ||||
4046 | /* set_raw_breakpoint() is a low level routine for allocating and | |||
4047 | partially initializing a breakpoint of type BPTYPE. The newly | |||
4048 | created breakpoint's address, section, source file name, and line | |||
4049 | number are provided by SAL. The newly created and partially | |||
4050 | initialized breakpoint is added to the breakpoint chain and | |||
4051 | is also returned as the value of this function. | |||
4052 | ||||
4053 | It is expected that the caller will complete the initialization of | |||
4054 | the newly created breakpoint struct as well as output any status | |||
4055 | information regarding the creation of a new breakpoint. In | |||
4056 | particular, set_raw_breakpoint() does NOT set the breakpoint | |||
4057 | number! Care should be taken to not allow an error() to occur | |||
4058 | prior to completing the initialization of the breakpoint. If this | |||
4059 | should happen, a bogus breakpoint will be left on the chain. */ | |||
4060 | ||||
4061 | struct breakpoint * | |||
4062 | set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype) | |||
4063 | { | |||
4064 | struct breakpoint *b, *b1; | |||
4065 | ||||
4066 | b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); | |||
4067 | memset (b, 0, sizeof (*b)); | |||
4068 | b->loc = allocate_bp_location (b, bptype); | |||
4069 | b->loc->requested_address = sal.pc; | |||
4070 | b->loc->address = adjust_breakpoint_address (b->loc->requested_address, | |||
4071 | bptype); | |||
4072 | if (sal.symtab == NULL((void*)0)) | |||
4073 | b->source_file = NULL((void*)0); | |||
4074 | else | |||
4075 | b->source_file = savestring (sal.symtab->filename, | |||
4076 | strlen (sal.symtab->filename)); | |||
4077 | b->loc->section = sal.section; | |||
4078 | b->type = bptype; | |||
4079 | b->language = current_language->la_language; | |||
4080 | b->input_radix = input_radix; | |||
4081 | b->thread = -1; | |||
4082 | b->line_number = sal.line; | |||
4083 | b->enable_state = bp_enabled; | |||
4084 | b->next = 0; | |||
4085 | b->silent = 0; | |||
4086 | b->ignore_count = 0; | |||
4087 | b->commands = NULL((void*)0); | |||
4088 | b->frame_id = null_frame_id; | |||
4089 | b->dll_pathname = NULL((void*)0); | |||
4090 | b->triggered_dll_pathname = NULL((void*)0); | |||
4091 | b->forked_inferior_pid = 0; | |||
4092 | b->exec_pathname = NULL((void*)0); | |||
4093 | b->ops = NULL((void*)0); | |||
4094 | b->pending = 0; | |||
4095 | ||||
4096 | /* Add this breakpoint to the end of the chain | |||
4097 | so that a list of breakpoints will come out in order | |||
4098 | of increasing numbers. */ | |||
4099 | ||||
4100 | b1 = breakpoint_chain; | |||
4101 | if (b1 == 0) | |||
4102 | breakpoint_chain = b; | |||
4103 | else | |||
4104 | { | |||
4105 | while (b1->next) | |||
4106 | b1 = b1->next; | |||
4107 | b1->next = b; | |||
4108 | } | |||
4109 | ||||
4110 | check_duplicates (b); | |||
4111 | breakpoints_changed (); | |||
4112 | ||||
4113 | return b; | |||
4114 | } | |||
4115 | ||||
4116 | ||||
4117 | /* Note that the breakpoint object B describes a permanent breakpoint | |||
4118 | instruction, hard-wired into the inferior's code. */ | |||
4119 | void | |||
4120 | make_breakpoint_permanent (struct breakpoint *b) | |||
4121 | { | |||
4122 | b->enable_state = bp_permanent; | |||
4123 | ||||
4124 | /* By definition, permanent breakpoints are already present in the code. */ | |||
4125 | b->loc->inserted = 1; | |||
4126 | } | |||
4127 | ||||
4128 | static struct breakpoint * | |||
4129 | create_internal_breakpoint (CORE_ADDR address, enum bptype type) | |||
4130 | { | |||
4131 | static int internal_breakpoint_number = -1; | |||
4132 | struct symtab_and_line sal; | |||
4133 | struct breakpoint *b; | |||
4134 | ||||
4135 | init_sal (&sal); /* initialize to zeroes */ | |||
4136 | ||||
4137 | sal.pc = address; | |||
4138 | sal.section = find_pc_overlay (sal.pc); | |||
4139 | ||||
4140 | b = set_raw_breakpoint (sal, type); | |||
4141 | b->number = internal_breakpoint_number--; | |||
4142 | b->disposition = disp_donttouch; | |||
4143 | ||||
4144 | return b; | |||
4145 | } | |||
4146 | ||||
4147 | ||||
4148 | static void | |||
4149 | create_longjmp_breakpoint (char *func_name) | |||
4150 | { | |||
4151 | struct breakpoint *b; | |||
4152 | struct minimal_symbol *m; | |||
4153 | ||||
4154 | if (func_name == NULL((void*)0)) | |||
4155 | b = create_internal_breakpoint (0, bp_longjmp_resume); | |||
4156 | else | |||
4157 | { | |||
4158 | if ((m = lookup_minimal_symbol_text (func_name, NULL((void*)0))) == NULL((void*)0)) | |||
4159 | return; | |||
4160 | ||||
4161 | b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m)(m)->ginfo.value.address, bp_longjmp); | |||
4162 | } | |||
4163 | ||||
4164 | b->enable_state = bp_disabled; | |||
4165 | b->silent = 1; | |||
4166 | if (func_name) | |||
4167 | b->addr_string = xstrdup (func_name); | |||
4168 | } | |||
4169 | ||||
4170 | /* Call this routine when stepping and nexting to enable a breakpoint | |||
4171 | if we do a longjmp(). When we hit that breakpoint, call | |||
4172 | set_longjmp_resume_breakpoint() to figure out where we are going. */ | |||
4173 | ||||
4174 | void | |||
4175 | enable_longjmp_breakpoint (void) | |||
4176 | { | |||
4177 | struct breakpoint *b; | |||
4178 | ||||
4179 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4180 | if (b->type == bp_longjmp) | |||
4181 | { | |||
4182 | b->enable_state = bp_enabled; | |||
4183 | check_duplicates (b); | |||
4184 | } | |||
4185 | } | |||
4186 | ||||
4187 | void | |||
4188 | disable_longjmp_breakpoint (void) | |||
4189 | { | |||
4190 | struct breakpoint *b; | |||
4191 | ||||
4192 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4193 | if (b->type == bp_longjmp | |||
4194 | || b->type == bp_longjmp_resume) | |||
4195 | { | |||
4196 | b->enable_state = bp_disabled; | |||
4197 | check_duplicates (b); | |||
4198 | } | |||
4199 | } | |||
4200 | ||||
4201 | static void | |||
4202 | create_overlay_event_breakpoint (char *func_name) | |||
4203 | { | |||
4204 | struct breakpoint *b; | |||
4205 | struct minimal_symbol *m; | |||
4206 | ||||
4207 | if ((m = lookup_minimal_symbol_text (func_name, NULL((void*)0))) == NULL((void*)0)) | |||
4208 | return; | |||
4209 | ||||
4210 | b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m)(m)->ginfo.value.address, | |||
4211 | bp_overlay_event); | |||
4212 | b->addr_string = xstrdup (func_name); | |||
4213 | ||||
4214 | if (overlay_debugging == ovly_auto) | |||
4215 | { | |||
4216 | b->enable_state = bp_enabled; | |||
4217 | overlay_events_enabled = 1; | |||
4218 | } | |||
4219 | else | |||
4220 | { | |||
4221 | b->enable_state = bp_disabled; | |||
4222 | overlay_events_enabled = 0; | |||
4223 | } | |||
4224 | } | |||
4225 | ||||
4226 | void | |||
4227 | enable_overlay_breakpoints (void) | |||
4228 | { | |||
4229 | struct breakpoint *b; | |||
4230 | ||||
4231 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4232 | if (b->type == bp_overlay_event) | |||
4233 | { | |||
4234 | b->enable_state = bp_enabled; | |||
4235 | check_duplicates (b); | |||
4236 | overlay_events_enabled = 1; | |||
4237 | } | |||
4238 | } | |||
4239 | ||||
4240 | void | |||
4241 | disable_overlay_breakpoints (void) | |||
4242 | { | |||
4243 | struct breakpoint *b; | |||
4244 | ||||
4245 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4246 | if (b->type == bp_overlay_event) | |||
4247 | { | |||
4248 | b->enable_state = bp_disabled; | |||
4249 | check_duplicates (b); | |||
4250 | overlay_events_enabled = 0; | |||
4251 | } | |||
4252 | } | |||
4253 | ||||
4254 | struct breakpoint * | |||
4255 | create_thread_event_breakpoint (CORE_ADDR address) | |||
4256 | { | |||
4257 | struct breakpoint *b; | |||
4258 | ||||
4259 | b = create_internal_breakpoint (address, bp_thread_event); | |||
4260 | ||||
4261 | b->enable_state = bp_enabled; | |||
4262 | /* addr_string has to be used or breakpoint_re_set will delete me. */ | |||
4263 | b->addr_string = xstrprintf ("*0x%s", paddr (b->loc->address)); | |||
4264 | ||||
4265 | return b; | |||
4266 | } | |||
4267 | ||||
4268 | void | |||
4269 | remove_thread_event_breakpoints (void) | |||
4270 | { | |||
4271 | struct breakpoint *b, *temp; | |||
4272 | ||||
4273 | ALL_BREAKPOINTS_SAFE (b, temp)for (b = breakpoint_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
4274 | if (b->type == bp_thread_event) | |||
4275 | delete_breakpoint (b); | |||
4276 | } | |||
4277 | ||||
4278 | struct captured_parse_breakpoint_args | |||
4279 | { | |||
4280 | char **arg_p; | |||
4281 | struct symtabs_and_lines *sals_p; | |||
4282 | char ***addr_string_p; | |||
4283 | int *not_found_ptr; | |||
4284 | }; | |||
4285 | ||||
4286 | struct lang_and_radix | |||
4287 | { | |||
4288 | enum language lang; | |||
4289 | int radix; | |||
4290 | }; | |||
4291 | ||||
4292 | /* Cleanup helper routine to restore the current language and | |||
4293 | input radix. */ | |||
4294 | static void | |||
4295 | do_restore_lang_radix_cleanup (void *old) | |||
4296 | { | |||
4297 | struct lang_and_radix *p = old; | |||
4298 | set_language (p->lang); | |||
4299 | input_radix = p->radix; | |||
4300 | } | |||
4301 | ||||
4302 | /* Try and resolve a pending breakpoint. */ | |||
4303 | static int | |||
4304 | resolve_pending_breakpoint (struct breakpoint *b) | |||
4305 | { | |||
4306 | /* Try and reparse the breakpoint in case the shared library | |||
4307 | is now loaded. */ | |||
4308 | struct symtabs_and_lines sals; | |||
4309 | struct symtab_and_line pending_sal; | |||
4310 | char **cond_string = (char **) NULL((void*)0); | |||
4311 | char *copy_arg = b->addr_string; | |||
4312 | char **addr_string; | |||
4313 | char *errmsg; | |||
4314 | int rc; | |||
4315 | int not_found = 0; | |||
4316 | struct ui_file *old_gdb_stderr; | |||
4317 | struct lang_and_radix old_lr; | |||
4318 | struct cleanup *old_chain; | |||
4319 | ||||
4320 | /* Set language, input-radix, then reissue breakpoint command. | |||
4321 | Ensure the language and input-radix are restored afterwards. */ | |||
4322 | old_lr.lang = current_language->la_language; | |||
4323 | old_lr.radix = input_radix; | |||
4324 | old_chain = make_cleanup (do_restore_lang_radix_cleanup, &old_lr); | |||
4325 | ||||
4326 | set_language (b->language); | |||
4327 | input_radix = b->input_radix; | |||
4328 | rc = break_command_1 (b->addr_string, b->flag, b->from_tty, b); | |||
4329 | ||||
4330 | if (rc == GDB_RC_OK) | |||
4331 | /* Pending breakpoint has been resolved. */ | |||
4332 | printf_filtered ("Pending breakpoint \"%s\" resolved\n", b->addr_string); | |||
4333 | ||||
4334 | do_cleanups (old_chain); | |||
4335 | return rc; | |||
4336 | } | |||
4337 | ||||
4338 | #ifdef SOLIB_ADD | |||
4339 | void | |||
4340 | remove_solib_event_breakpoints (void) | |||
4341 | { | |||
4342 | struct breakpoint *b, *temp; | |||
4343 | ||||
4344 | ALL_BREAKPOINTS_SAFE (b, temp)for (b = breakpoint_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
4345 | if (b->type == bp_shlib_event) | |||
4346 | delete_breakpoint (b); | |||
4347 | } | |||
4348 | ||||
4349 | struct breakpoint * | |||
4350 | create_solib_event_breakpoint (CORE_ADDR address) | |||
4351 | { | |||
4352 | struct breakpoint *b; | |||
4353 | ||||
4354 | b = create_internal_breakpoint (address, bp_shlib_event); | |||
4355 | return b; | |||
4356 | } | |||
4357 | ||||
4358 | /* Disable any breakpoints that are on code in shared libraries. Only | |||
4359 | apply to enabled breakpoints, disabled ones can just stay disabled. */ | |||
4360 | ||||
4361 | void | |||
4362 | disable_breakpoints_in_shlibs (int silent) | |||
4363 | { | |||
4364 | struct breakpoint *b; | |||
4365 | int disabled_shlib_breaks = 0; | |||
4366 | ||||
4367 | /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */ | |||
4368 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4369 | { | |||
4370 | #if defined (PC_SOLIB) | |||
4371 | if (((b->type == bp_breakpoint) || | |||
4372 | (b->type == bp_hardware_breakpoint)) && | |||
4373 | breakpoint_enabled (b) && | |||
4374 | !b->loc->duplicate && | |||
4375 | PC_SOLIB (b->loc->address)solib_address (b->loc->address)) | |||
4376 | { | |||
4377 | b->enable_state = bp_shlib_disabled; | |||
4378 | if (!silent) | |||
4379 | { | |||
4380 | if (!disabled_shlib_breaks) | |||
4381 | { | |||
4382 | target_terminal_ours_for_output ()(*current_target.to_terminal_ours_for_output) (); | |||
4383 | warning ("Temporarily disabling shared library breakpoints:"); | |||
4384 | } | |||
4385 | disabled_shlib_breaks = 1; | |||
4386 | warning ("breakpoint #%d ", b->number); | |||
4387 | } | |||
4388 | } | |||
4389 | #endif | |||
4390 | } | |||
4391 | } | |||
4392 | ||||
4393 | /* Disable any breakpoints that are in in an unloaded shared library. Only | |||
4394 | apply to enabled breakpoints, disabled ones can just stay disabled. */ | |||
4395 | ||||
4396 | void | |||
4397 | disable_breakpoints_in_unloaded_shlib (struct so_list *solib) | |||
4398 | { | |||
4399 | struct breakpoint *b; | |||
4400 | int disabled_shlib_breaks = 0; | |||
4401 | ||||
4402 | #if defined (PC_SOLIB) | |||
4403 | /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */ | |||
4404 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4405 | { | |||
4406 | if ((b->loc->loc_type == bp_loc_hardware_breakpoint | |||
4407 | || b->loc->loc_type == bp_loc_software_breakpoint) | |||
4408 | && breakpoint_enabled (b) | |||
4409 | && !b->loc->duplicate) | |||
4410 | { | |||
4411 | char *so_name = PC_SOLIB (b->loc->address)solib_address (b->loc->address); | |||
4412 | if (so_name | |||
4413 | && !strcmp (so_name, solib->so_name)) | |||
4414 | { | |||
4415 | b->enable_state = bp_shlib_disabled; | |||
4416 | /* At this point, we cannot rely on remove_breakpoint | |||
4417 | succeeding so we must mark the breakpoint as not inserted | |||
4418 | to prevent future errors occurring in remove_breakpoints. */ | |||
4419 | b->loc->inserted = 0; | |||
4420 | if (!disabled_shlib_breaks) | |||
4421 | { | |||
4422 | target_terminal_ours_for_output ()(*current_target.to_terminal_ours_for_output) (); | |||
4423 | warning ("Temporarily disabling breakpoints for unloaded shared library \"%s\"", | |||
4424 | so_name); | |||
4425 | } | |||
4426 | disabled_shlib_breaks = 1; | |||
4427 | } | |||
4428 | } | |||
4429 | } | |||
4430 | #endif | |||
4431 | } | |||
4432 | ||||
4433 | /* Try to reenable any breakpoints in shared libraries. */ | |||
4434 | void | |||
4435 | re_enable_breakpoints_in_shlibs (void) | |||
4436 | { | |||
4437 | struct breakpoint *b, *tmp; | |||
4438 | ||||
4439 | ALL_BREAKPOINTS_SAFE (b, tmp)for (b = breakpoint_chain; b ? (tmp=b->next, 1): 0; b = tmp ) | |||
4440 | { | |||
4441 | if (b->enable_state == bp_shlib_disabled) | |||
4442 | { | |||
4443 | char buf[1], *lib; | |||
4444 | ||||
4445 | /* Do not reenable the breakpoint if the shared library | |||
4446 | is still not mapped in. */ | |||
4447 | lib = PC_SOLIB (b->loc->address)solib_address (b->loc->address); | |||
4448 | if (lib != NULL((void*)0) && target_read_memory (b->loc->address, buf, 1) == 0) | |||
4449 | b->enable_state = bp_enabled; | |||
4450 | } | |||
4451 | else if (b->pending && (b->enable_state == bp_enabled)) | |||
4452 | { | |||
4453 | if (resolve_pending_breakpoint (b) == GDB_RC_OK) | |||
4454 | delete_breakpoint (b); | |||
4455 | } | |||
4456 | } | |||
4457 | } | |||
4458 | ||||
4459 | #endif | |||
4460 | ||||
4461 | void | |||
4462 | disable_breakpoints_at_startup (int silent) | |||
4463 | { | |||
4464 | struct breakpoint *b; | |||
4465 | int disabled_startup_breaks = 0; | |||
4466 | ||||
4467 | if (bfd_get_start_address (exec_bfd)((exec_bfd)->start_address) != entry_point_address ()) | |||
4468 | { | |||
4469 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4470 | { | |||
4471 | if (((b->type == bp_breakpoint) || | |||
4472 | (b->type == bp_hardware_breakpoint)) && | |||
4473 | b->enable_state == bp_enabled && | |||
4474 | !b->loc->duplicate && | |||
4475 | !b->pending) | |||
4476 | { | |||
4477 | b->enable_state = bp_startup_disabled; | |||
4478 | if (!silent) | |||
4479 | { | |||
4480 | if (!disabled_startup_breaks) | |||
4481 | { | |||
4482 | target_terminal_ours_for_output ()(*current_target.to_terminal_ours_for_output) (); | |||
4483 | warning ("Temporarily disabling breakpoints:"); | |||
4484 | } | |||
4485 | disabled_startup_breaks = 1; | |||
4486 | warning ("breakpoint #%d addr 0x%s", b->number, paddr_nz(b->loc->address)); | |||
4487 | } | |||
4488 | } | |||
4489 | } | |||
4490 | } | |||
4491 | } | |||
4492 | ||||
4493 | /* Try to reenable any breakpoints after startup. */ | |||
4494 | void | |||
4495 | re_enable_breakpoints_at_startup (void) | |||
4496 | { | |||
4497 | struct breakpoint *b; | |||
4498 | ||||
4499 | if (bfd_get_start_address (exec_bfd)((exec_bfd)->start_address) != entry_point_address ()) | |||
4500 | { | |||
4501 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4502 | if (b->enable_state == bp_startup_disabled) | |||
4503 | { | |||
4504 | char buf[1]; | |||
4505 | ||||
4506 | /* Do not reenable the breakpoint if the shared library | |||
4507 | is still not mapped in. */ | |||
4508 | if (target_read_memory (b->loc->address, buf, 1) == 0) | |||
4509 | b->enable_state = bp_enabled; | |||
4510 | } | |||
4511 | } | |||
4512 | } | |||
4513 | ||||
4514 | ||||
4515 | static void | |||
4516 | solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname, | |||
4517 | char *cond_string, enum bptype bp_kind) | |||
4518 | { | |||
4519 | struct breakpoint *b; | |||
4520 | struct symtabs_and_lines sals; | |||
4521 | struct cleanup *old_chain; | |||
4522 | struct cleanup *canonical_strings_chain = NULL((void*)0); | |||
4523 | char *addr_start = hookname; | |||
4524 | char *addr_end = NULL((void*)0); | |||
4525 | char **canonical = (char **) NULL((void*)0); | |||
4526 | int thread = -1; /* All threads. */ | |||
4527 | ||||
4528 | /* Set a breakpoint on the specified hook. */ | |||
4529 | sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL((void*)0), 0, &canonical, NULL((void*)0)); | |||
4530 | addr_end = hookname; | |||
4531 | ||||
4532 | if (sals.nelts == 0) | |||
4533 | { | |||
4534 | warning ("Unable to set a breakpoint on dynamic linker callback."); | |||
4535 | warning ("Suggest linking with /opt/langtools/lib/end.o."); | |||
4536 | warning ("GDB will be unable to track shl_load/shl_unload calls"); | |||
4537 | return; | |||
4538 | } | |||
4539 | if (sals.nelts != 1) | |||
4540 | { | |||
4541 | warning ("Unable to set unique breakpoint on dynamic linker callback."); | |||
4542 | warning ("GDB will be unable to track shl_load/shl_unload calls"); | |||
4543 | return; | |||
4544 | } | |||
4545 | ||||
4546 | /* Make sure that all storage allocated in decode_line_1 gets freed | |||
4547 | in case the following errors out. */ | |||
4548 | old_chain = make_cleanup (xfree, sals.sals); | |||
4549 | if (canonical != (char **) NULL((void*)0)) | |||
4550 | { | |||
4551 | make_cleanup (xfree, canonical); | |||
4552 | canonical_strings_chain = make_cleanup (null_cleanup, 0); | |||
4553 | if (canonical[0] != NULL((void*)0)) | |||
4554 | make_cleanup (xfree, canonical[0]); | |||
4555 | } | |||
4556 | ||||
4557 | resolve_sal_pc (&sals.sals[0]); | |||
4558 | ||||
4559 | /* Remove the canonical strings from the cleanup, they are needed below. */ | |||
4560 | if (canonical != (char **) NULL((void*)0)) | |||
4561 | discard_cleanups (canonical_strings_chain); | |||
4562 | ||||
4563 | b = set_raw_breakpoint (sals.sals[0], bp_kind); | |||
4564 | set_breakpoint_count (breakpoint_count + 1); | |||
4565 | b->number = breakpoint_count; | |||
4566 | b->cond = NULL((void*)0); | |||
4567 | b->cond_string = (cond_string == NULL((void*)0)) ? | |||
4568 | NULL((void*)0) : savestring (cond_string, strlen (cond_string)); | |||
4569 | b->thread = thread; | |||
4570 | ||||
4571 | if (canonical != (char **) NULL((void*)0) && canonical[0] != NULL((void*)0)) | |||
4572 | b->addr_string = canonical[0]; | |||
4573 | else if (addr_start) | |||
4574 | b->addr_string = savestring (addr_start, addr_end - addr_start); | |||
4575 | ||||
4576 | b->enable_state = bp_enabled; | |||
4577 | b->disposition = tempflag ? disp_del : disp_donttouch; | |||
4578 | ||||
4579 | if (dll_pathname == NULL((void*)0)) | |||
4580 | b->dll_pathname = NULL((void*)0); | |||
4581 | else | |||
4582 | { | |||
4583 | b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1); | |||
4584 | strcpy (b->dll_pathname, dll_pathname); | |||
4585 | } | |||
4586 | ||||
4587 | mention (b); | |||
4588 | do_cleanups (old_chain); | |||
4589 | } | |||
4590 | ||||
4591 | void | |||
4592 | create_solib_load_event_breakpoint (char *hookname, int tempflag, | |||
4593 | char *dll_pathname, char *cond_string) | |||
4594 | { | |||
4595 | solib_load_unload_1 (hookname, tempflag, dll_pathname, | |||
4596 | cond_string, bp_catch_load); | |||
4597 | } | |||
4598 | ||||
4599 | void | |||
4600 | create_solib_unload_event_breakpoint (char *hookname, int tempflag, | |||
4601 | char *dll_pathname, char *cond_string) | |||
4602 | { | |||
4603 | solib_load_unload_1 (hookname,tempflag, dll_pathname, | |||
4604 | cond_string, bp_catch_unload); | |||
4605 | } | |||
4606 | ||||
4607 | static void | |||
4608 | create_fork_vfork_event_catchpoint (int tempflag, char *cond_string, | |||
4609 | enum bptype bp_kind) | |||
4610 | { | |||
4611 | struct symtab_and_line sal; | |||
4612 | struct breakpoint *b; | |||
4613 | int thread = -1; /* All threads. */ | |||
4614 | ||||
4615 | init_sal (&sal); | |||
4616 | sal.pc = 0; | |||
4617 | sal.symtab = NULL((void*)0); | |||
4618 | sal.line = 0; | |||
4619 | ||||
4620 | b = set_raw_breakpoint (sal, bp_kind); | |||
4621 | set_breakpoint_count (breakpoint_count + 1); | |||
4622 | b->number = breakpoint_count; | |||
4623 | b->cond = NULL((void*)0); | |||
4624 | b->cond_string = (cond_string == NULL((void*)0)) ? | |||
4625 | NULL((void*)0) : savestring (cond_string, strlen (cond_string)); | |||
4626 | b->thread = thread; | |||
4627 | b->addr_string = NULL((void*)0); | |||
4628 | b->enable_state = bp_enabled; | |||
4629 | b->disposition = tempflag ? disp_del : disp_donttouch; | |||
4630 | b->forked_inferior_pid = 0; | |||
4631 | ||||
4632 | mention (b); | |||
4633 | } | |||
4634 | ||||
4635 | void | |||
4636 | create_fork_event_catchpoint (int tempflag, char *cond_string) | |||
4637 | { | |||
4638 | create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork); | |||
4639 | } | |||
4640 | ||||
4641 | void | |||
4642 | create_vfork_event_catchpoint (int tempflag, char *cond_string) | |||
4643 | { | |||
4644 | create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork); | |||
4645 | } | |||
4646 | ||||
4647 | void | |||
4648 | create_exec_event_catchpoint (int tempflag, char *cond_string) | |||
4649 | { | |||
4650 | struct symtab_and_line sal; | |||
4651 | struct breakpoint *b; | |||
4652 | int thread = -1; /* All threads. */ | |||
4653 | ||||
4654 | init_sal (&sal); | |||
4655 | sal.pc = 0; | |||
4656 | sal.symtab = NULL((void*)0); | |||
4657 | sal.line = 0; | |||
4658 | ||||
4659 | b = set_raw_breakpoint (sal, bp_catch_exec); | |||
4660 | set_breakpoint_count (breakpoint_count + 1); | |||
4661 | b->number = breakpoint_count; | |||
4662 | b->cond = NULL((void*)0); | |||
4663 | b->cond_string = (cond_string == NULL((void*)0)) ? | |||
4664 | NULL((void*)0) : savestring (cond_string, strlen (cond_string)); | |||
4665 | b->thread = thread; | |||
4666 | b->addr_string = NULL((void*)0); | |||
4667 | b->enable_state = bp_enabled; | |||
4668 | b->disposition = tempflag ? disp_del : disp_donttouch; | |||
4669 | ||||
4670 | mention (b); | |||
4671 | } | |||
4672 | ||||
4673 | static int | |||
4674 | hw_breakpoint_used_count (void) | |||
4675 | { | |||
4676 | struct breakpoint *b; | |||
4677 | int i = 0; | |||
4678 | ||||
4679 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4680 | { | |||
4681 | if (b->type == bp_hardware_breakpoint && b->enable_state == bp_enabled) | |||
4682 | i++; | |||
4683 | } | |||
4684 | ||||
4685 | return i; | |||
4686 | } | |||
4687 | ||||
4688 | static int | |||
4689 | hw_watchpoint_used_count (enum bptype type, int *other_type_used) | |||
4690 | { | |||
4691 | struct breakpoint *b; | |||
4692 | int i = 0; | |||
4693 | ||||
4694 | *other_type_used = 0; | |||
4695 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4696 | { | |||
4697 | if (breakpoint_enabled (b)) | |||
4698 | { | |||
4699 | if (b->type == type) | |||
4700 | i++; | |||
4701 | else if ((b->type == bp_hardware_watchpoint || | |||
4702 | b->type == bp_read_watchpoint || | |||
4703 | b->type == bp_access_watchpoint)) | |||
4704 | *other_type_used = 1; | |||
4705 | } | |||
4706 | } | |||
4707 | return i; | |||
4708 | } | |||
4709 | ||||
4710 | /* Call this after hitting the longjmp() breakpoint. Use this to set | |||
4711 | a new breakpoint at the target of the jmp_buf. | |||
4712 | ||||
4713 | FIXME - This ought to be done by setting a temporary breakpoint | |||
4714 | that gets deleted automatically... */ | |||
4715 | ||||
4716 | void | |||
4717 | set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_id frame_id) | |||
4718 | { | |||
4719 | struct breakpoint *b; | |||
4720 | ||||
4721 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4722 | if (b->type == bp_longjmp_resume) | |||
4723 | { | |||
4724 | b->loc->requested_address = pc; | |||
4725 | b->loc->address = adjust_breakpoint_address (b->loc->requested_address, | |||
4726 | b->type); | |||
4727 | b->enable_state = bp_enabled; | |||
4728 | b->frame_id = frame_id; | |||
4729 | check_duplicates (b); | |||
4730 | return; | |||
4731 | } | |||
4732 | } | |||
4733 | ||||
4734 | void | |||
4735 | disable_watchpoints_before_interactive_call_start (void) | |||
4736 | { | |||
4737 | struct breakpoint *b; | |||
4738 | ||||
4739 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4740 | { | |||
4741 | if (((b->type == bp_watchpoint) | |||
4742 | || (b->type == bp_hardware_watchpoint) | |||
4743 | || (b->type == bp_read_watchpoint) | |||
4744 | || (b->type == bp_access_watchpoint) | |||
4745 | || ep_is_exception_catchpoint (b)) | |||
4746 | && breakpoint_enabled (b)) | |||
4747 | { | |||
4748 | b->enable_state = bp_call_disabled; | |||
4749 | check_duplicates (b); | |||
4750 | } | |||
4751 | } | |||
4752 | } | |||
4753 | ||||
4754 | void | |||
4755 | enable_watchpoints_after_interactive_call_stop (void) | |||
4756 | { | |||
4757 | struct breakpoint *b; | |||
4758 | ||||
4759 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
4760 | { | |||
4761 | if (((b->type == bp_watchpoint) | |||
4762 | || (b->type == bp_hardware_watchpoint) | |||
4763 | || (b->type == bp_read_watchpoint) | |||
4764 | || (b->type == bp_access_watchpoint) | |||
4765 | || ep_is_exception_catchpoint (b)) | |||
4766 | && (b->enable_state == bp_call_disabled)) | |||
4767 | { | |||
4768 | b->enable_state = bp_enabled; | |||
4769 | check_duplicates (b); | |||
4770 | } | |||
4771 | } | |||
4772 | } | |||
4773 | ||||
4774 | ||||
4775 | /* Set a breakpoint that will evaporate an end of command | |||
4776 | at address specified by SAL. | |||
4777 | Restrict it to frame FRAME if FRAME is nonzero. */ | |||
4778 | ||||
4779 | struct breakpoint * | |||
4780 | set_momentary_breakpoint (struct symtab_and_line sal, struct frame_id frame_id, | |||
4781 | enum bptype type) | |||
4782 | { | |||
4783 | struct breakpoint *b; | |||
4784 | b = set_raw_breakpoint (sal, type); | |||
4785 | b->enable_state = bp_enabled; | |||
4786 | b->disposition = disp_donttouch; | |||
4787 | b->frame_id = frame_id; | |||
4788 | ||||
4789 | /* If we're debugging a multi-threaded program, then we | |||
4790 | want momentary breakpoints to be active in only a | |||
4791 | single thread of control. */ | |||
4792 | if (in_thread_list (inferior_ptid)) | |||
4793 | b->thread = pid_to_thread_id (inferior_ptid); | |||
4794 | ||||
4795 | return b; | |||
4796 | } | |||
4797 | ||||
4798 | ||||
4799 | /* Tell the user we have just set a breakpoint B. */ | |||
4800 | ||||
4801 | static void | |||
4802 | mention (struct breakpoint *b) | |||
4803 | { | |||
4804 | int say_where = 0; | |||
4805 | struct cleanup *old_chain, *ui_out_chain; | |||
4806 | struct ui_stream *stb; | |||
4807 | ||||
4808 | stb = ui_out_stream_new (uiout); | |||
4809 | old_chain = make_cleanup_ui_out_stream_delete (stb); | |||
4810 | ||||
4811 | /* FIXME: This is misplaced; mention() is called by things (like | |||
4812 | hitting a watchpoint) other than breakpoint creation. It should | |||
4813 | be possible to clean this up and at the same time replace the | |||
4814 | random calls to breakpoint_changed with this hook, as has already | |||
4815 | been done for deprecated_delete_breakpoint_hook and so on. */ | |||
4816 | if (deprecated_create_breakpoint_hook) | |||
4817 | deprecated_create_breakpoint_hook (b); | |||
4818 | breakpoint_create_event (b->number); | |||
4819 | ||||
4820 | if (b->ops != NULL((void*)0) && b->ops->print_mention != NULL((void*)0)) | |||
4821 | b->ops->print_mention (b); | |||
4822 | else | |||
4823 | switch (b->type) | |||
4824 | { | |||
4825 | case bp_none: | |||
4826 | printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number); | |||
4827 | break; | |||
4828 | case bp_watchpoint: | |||
4829 | ui_out_text (uiout, "Watchpoint "); | |||
4830 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); | |||
4831 | ui_out_field_int (uiout, "number", b->number); | |||
4832 | ui_out_text (uiout, ": "); | |||
4833 | print_expression (b->exp, stb->stream); | |||
4834 | ui_out_field_stream (uiout, "exp", stb); | |||
4835 | do_cleanups (ui_out_chain); | |||
4836 | break; | |||
4837 | case bp_hardware_watchpoint: | |||
4838 | ui_out_text (uiout, "Hardware watchpoint "); | |||
4839 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); | |||
4840 | ui_out_field_int (uiout, "number", b->number); | |||
4841 | ui_out_text (uiout, ": "); | |||
4842 | print_expression (b->exp, stb->stream); | |||
4843 | ui_out_field_stream (uiout, "exp", stb); | |||
4844 | do_cleanups (ui_out_chain); | |||
4845 | break; | |||
4846 | case bp_read_watchpoint: | |||
4847 | ui_out_text (uiout, "Hardware read watchpoint "); | |||
4848 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt"); | |||
4849 | ui_out_field_int (uiout, "number", b->number); | |||
4850 | ui_out_text (uiout, ": "); | |||
4851 | print_expression (b->exp, stb->stream); | |||
4852 | ui_out_field_stream (uiout, "exp", stb); | |||
4853 | do_cleanups (ui_out_chain); | |||
4854 | break; | |||
4855 | case bp_access_watchpoint: | |||
4856 | ui_out_text (uiout, "Hardware access (read/write) watchpoint "); | |||
4857 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt"); | |||
4858 | ui_out_field_int (uiout, "number", b->number); | |||
4859 | ui_out_text (uiout, ": "); | |||
4860 | print_expression (b->exp, stb->stream); | |||
4861 | ui_out_field_stream (uiout, "exp", stb); | |||
4862 | do_cleanups (ui_out_chain); | |||
4863 | break; | |||
4864 | case bp_breakpoint: | |||
4865 | if (ui_out_is_mi_like_p (uiout)) | |||
4866 | { | |||
4867 | say_where = 0; | |||
4868 | break; | |||
4869 | } | |||
4870 | printf_filtered ("Breakpoint %d", b->number); | |||
4871 | say_where = 1; | |||
4872 | break; | |||
4873 | case bp_hardware_breakpoint: | |||
4874 | if (ui_out_is_mi_like_p (uiout)) | |||
4875 | { | |||
4876 | say_where = 0; | |||
4877 | break; | |||
4878 | } | |||
4879 | printf_filtered ("Hardware assisted breakpoint %d", b->number); | |||
4880 | say_where = 1; | |||
4881 | break; | |||
4882 | case bp_catch_load: | |||
4883 | case bp_catch_unload: | |||
4884 | printf_filtered ("Catchpoint %d (%s %s)", | |||
4885 | b->number, | |||
4886 | (b->type == bp_catch_load) ? "load" : "unload", | |||
4887 | (b->dll_pathname != NULL((void*)0)) ? | |||
4888 | b->dll_pathname : "<any library>"); | |||
4889 | break; | |||
4890 | case bp_catch_fork: | |||
4891 | case bp_catch_vfork: | |||
4892 | printf_filtered ("Catchpoint %d (%s)", | |||
4893 | b->number, | |||
4894 | (b->type == bp_catch_fork) ? "fork" : "vfork"); | |||
4895 | break; | |||
4896 | case bp_catch_exec: | |||
4897 | printf_filtered ("Catchpoint %d (exec)", | |||
4898 | b->number); | |||
4899 | break; | |||
4900 | case bp_catch_catch: | |||
4901 | case bp_catch_throw: | |||
4902 | printf_filtered ("Catchpoint %d (%s)", | |||
4903 | b->number, | |||
4904 | (b->type == bp_catch_catch) ? "catch" : "throw"); | |||
4905 | break; | |||
4906 | ||||
4907 | case bp_until: | |||
4908 | case bp_finish: | |||
4909 | case bp_longjmp: | |||
4910 | case bp_longjmp_resume: | |||
4911 | case bp_step_resume: | |||
4912 | case bp_through_sigtramp: | |||
4913 | case bp_call_dummy: | |||
4914 | case bp_watchpoint_scope: | |||
4915 | case bp_shlib_event: | |||
4916 | case bp_thread_event: | |||
4917 | case bp_overlay_event: | |||
4918 | break; | |||
4919 | } | |||
4920 | ||||
4921 | if (say_where) | |||
4922 | { | |||
4923 | if (b->pending) | |||
4924 | { | |||
4925 | printf_filtered (" (%s) pending.", b->addr_string); | |||
4926 | } | |||
4927 | else | |||
4928 | { | |||
4929 | if (addressprint || b->source_file == NULL((void*)0)) | |||
4930 | { | |||
4931 | printf_filtered (" at "); | |||
4932 | print_address_numeric (b->loc->address, 1, gdb_stdout); | |||
4933 | } | |||
4934 | if (b->source_file) | |||
4935 | printf_filtered (": file %s, line %d.", | |||
4936 | b->source_file, b->line_number); | |||
4937 | } | |||
4938 | } | |||
4939 | do_cleanups (old_chain); | |||
4940 | if (ui_out_is_mi_like_p (uiout)) | |||
4941 | return; | |||
4942 | printf_filtered ("\n"); | |||
4943 | } | |||
4944 | ||||
4945 | ||||
4946 | /* Add SALS.nelts breakpoints to the breakpoint table. For each | |||
4947 | SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i], | |||
4948 | COND[i] and COND_STRING[i] values. | |||
4949 | ||||
4950 | The parameter PENDING_BP points to a pending breakpoint that is | |||
4951 | the basis of the breakpoints currently being created. The pending | |||
4952 | breakpoint may contain a separate condition string or commands | |||
4953 | that were added after the initial pending breakpoint was created. | |||
4954 | ||||
4955 | NOTE: If the function succeeds, the caller is expected to cleanup | |||
4956 | the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the | |||
4957 | array contents). If the function fails (error() is called), the | |||
4958 | caller is expected to cleanups both the ADDR_STRING, COND_STRING, | |||
4959 | COND and SALS arrays and each of those arrays contents. */ | |||
4960 | ||||
4961 | static void | |||
4962 | create_breakpoints (struct symtabs_and_lines sals, char **addr_string, | |||
4963 | struct expression **cond, char **cond_string, | |||
4964 | enum bptype type, enum bpdisp disposition, | |||
4965 | int thread, int ignore_count, int from_tty, | |||
4966 | struct breakpoint *pending_bp) | |||
4967 | { | |||
4968 | if (type == bp_hardware_breakpoint) | |||
4969 | { | |||
4970 | int i = hw_breakpoint_used_count (); | |||
4971 | int target_resources_ok = | |||
4972 | TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,(*current_target.to_can_use_hw_breakpoint) (bp_hardware_breakpoint , i + sals.nelts, 0); | |||
4973 | i + sals.nelts, 0)(*current_target.to_can_use_hw_breakpoint) (bp_hardware_breakpoint , i + sals.nelts, 0);; | |||
4974 | if (target_resources_ok == 0) | |||
4975 | error ("No hardware breakpoint support in the target."); | |||
4976 | else if (target_resources_ok < 0) | |||
4977 | error ("Hardware breakpoints used exceeds limit."); | |||
4978 | } | |||
4979 | ||||
4980 | /* Now set all the breakpoints. */ | |||
4981 | { | |||
4982 | int i; | |||
4983 | for (i = 0; i < sals.nelts; i++) | |||
4984 | { | |||
4985 | struct breakpoint *b; | |||
4986 | struct symtab_and_line sal = sals.sals[i]; | |||
4987 | ||||
4988 | if (from_tty) | |||
4989 | describe_other_breakpoints (sal.pc, sal.section); | |||
4990 | ||||
4991 | b = set_raw_breakpoint (sal, type); | |||
4992 | set_breakpoint_count (breakpoint_count + 1); | |||
4993 | b->number = breakpoint_count; | |||
4994 | b->cond = cond[i]; | |||
4995 | b->thread = thread; | |||
4996 | if (addr_string[i]) | |||
4997 | b->addr_string = addr_string[i]; | |||
4998 | else | |||
4999 | /* addr_string has to be used or breakpoint_re_set will delete | |||
5000 | me. */ | |||
5001 | b->addr_string = xstrprintf ("*0x%s", paddr (b->loc->address)); | |||
5002 | b->cond_string = cond_string[i]; | |||
5003 | b->ignore_count = ignore_count; | |||
5004 | b->enable_state = bp_enabled; | |||
5005 | b->disposition = disposition; | |||
5006 | /* If resolving a pending breakpoint, a check must be made to see if | |||
5007 | the user has specified a new condition or commands for the | |||
5008 | breakpoint. A new condition will override any condition that was | |||
5009 | initially specified with the initial breakpoint command. */ | |||
5010 | if (pending_bp) | |||
5011 | { | |||
5012 | char *arg; | |||
5013 | if (pending_bp->cond_string) | |||
5014 | { | |||
5015 | arg = pending_bp->cond_string; | |||
5016 | b->cond_string = savestring (arg, strlen (arg)); | |||
5017 | b->cond = parse_exp_1 (&arg, block_for_pc (b->loc->address), 0); | |||
5018 | if (*arg) | |||
5019 | error ("Junk at end of pending breakpoint condition expression"); | |||
5020 | } | |||
5021 | /* If there are commands associated with the breakpoint, they should | |||
5022 | be copied too. */ | |||
5023 | if (pending_bp->commands) | |||
5024 | b->commands = copy_command_lines (pending_bp->commands); | |||
5025 | ||||
5026 | /* We have to copy over the ignore_count and thread as well. */ | |||
5027 | b->ignore_count = pending_bp->ignore_count; | |||
5028 | b->thread = pending_bp->thread; | |||
5029 | } | |||
5030 | mention (b); | |||
5031 | } | |||
5032 | } | |||
5033 | } | |||
5034 | ||||
5035 | /* Parse ARG which is assumed to be a SAL specification possibly | |||
5036 | followed by conditionals. On return, SALS contains an array of SAL | |||
5037 | addresses found. ADDR_STRING contains a vector of (canonical) | |||
5038 | address strings. ARG points to the end of the SAL. */ | |||
5039 | ||||
5040 | static void | |||
5041 | parse_breakpoint_sals (char **address, | |||
5042 | struct symtabs_and_lines *sals, | |||
5043 | char ***addr_string, | |||
5044 | int *not_found_ptr) | |||
5045 | { | |||
5046 | char *addr_start = *address; | |||
5047 | *addr_string = NULL((void*)0); | |||
5048 | /* If no arg given, or if first arg is 'if ', use the default | |||
5049 | breakpoint. */ | |||
5050 | if ((*address) == NULL((void*)0) | |||
5051 | || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2]))) | |||
5052 | { | |||
5053 | if (default_breakpoint_valid) | |||
5054 | { | |||
5055 | struct symtab_and_line sal; | |||
5056 | init_sal (&sal); /* initialize to zeroes */ | |||
5057 | sals->sals = (struct symtab_and_line *) | |||
5058 | xmalloc (sizeof (struct symtab_and_line)); | |||
5059 | sal.pc = default_breakpoint_address; | |||
5060 | sal.line = default_breakpoint_line; | |||
5061 | sal.symtab = default_breakpoint_symtab; | |||
5062 | sal.section = find_pc_overlay (sal.pc); | |||
5063 | sals->sals[0] = sal; | |||
5064 | sals->nelts = 1; | |||
5065 | } | |||
5066 | else | |||
5067 | error ("No default breakpoint address now."); | |||
5068 | } | |||
5069 | else | |||
5070 | { | |||
5071 | /* Force almost all breakpoints to be in terms of the | |||
5072 | current_source_symtab (which is decode_line_1's default). This | |||
5073 | should produce the results we want almost all of the time while | |||
5074 | leaving default_breakpoint_* alone. | |||
5075 | ObjC: However, don't match an Objective-C method name which | |||
5076 | may have a '+' or '-' succeeded by a '[' */ | |||
5077 | ||||
5078 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |||
5079 | ||||
5080 | if (default_breakpoint_valid | |||
5081 | && (!cursal.symtab | |||
5082 | || ((strchr ("+-", (*address)[0]) != NULL((void*)0)) | |||
5083 | && ((*address)[1] != '[')))) | |||
5084 | *sals = decode_line_1 (address, 1, default_breakpoint_symtab, | |||
5085 | default_breakpoint_line, addr_string, | |||
5086 | not_found_ptr); | |||
5087 | else | |||
5088 | *sals = decode_line_1 (address, 1, (struct symtab *) NULL((void*)0), 0, | |||
5089 | addr_string, not_found_ptr); | |||
5090 | } | |||
5091 | /* For any SAL that didn't have a canonical string, fill one in. */ | |||
5092 | if (sals->nelts > 0 && *addr_string == NULL((void*)0)) | |||
5093 | *addr_string = xcalloc (sals->nelts, sizeof (char **)); | |||
5094 | if (addr_start != (*address)) | |||
5095 | { | |||
5096 | int i; | |||
5097 | for (i = 0; i < sals->nelts; i++) | |||
5098 | { | |||
5099 | /* Add the string if not present. */ | |||
5100 | if ((*addr_string)[i] == NULL((void*)0)) | |||
5101 | (*addr_string)[i] = savestring (addr_start, (*address) - addr_start); | |||
5102 | } | |||
5103 | } | |||
5104 | } | |||
5105 | ||||
5106 | ||||
5107 | /* Convert each SAL into a real PC. Verify that the PC can be | |||
5108 | inserted as a breakpoint. If it can't throw an error. */ | |||
5109 | ||||
5110 | static void | |||
5111 | breakpoint_sals_to_pc (struct symtabs_and_lines *sals, | |||
5112 | char *address) | |||
5113 | { | |||
5114 | int i; | |||
5115 | for (i = 0; i < sals->nelts; i++) | |||
5116 | { | |||
5117 | resolve_sal_pc (&sals->sals[i]); | |||
5118 | ||||
5119 | /* It's possible for the PC to be nonzero, but still an illegal | |||
5120 | value on some targets. | |||
5121 | ||||
5122 | For example, on HP-UX if you start gdb, and before running the | |||
5123 | inferior you try to set a breakpoint on a shared library function | |||
5124 | "foo" where the inferior doesn't call "foo" directly but does | |||
5125 | pass its address to another function call, then we do find a | |||
5126 | minimal symbol for the "foo", but it's address is invalid. | |||
5127 | (Appears to be an index into a table that the loader sets up | |||
5128 | when the inferior is run.) | |||
5129 | ||||
5130 | Give the target a chance to bless sals.sals[i].pc before we | |||
5131 | try to make a breakpoint for it. */ | |||
5132 | #ifdef DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE | |||
5133 | if (DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc)) | |||
5134 | { | |||
5135 | if (address == NULL((void*)0)) | |||
5136 | error ("Cannot break without a running program."); | |||
5137 | else | |||
5138 | error ("Cannot break on %s without a running program.", | |||
5139 | address); | |||
5140 | } | |||
5141 | #endif | |||
5142 | } | |||
5143 | } | |||
5144 | ||||
5145 | static int | |||
5146 | do_captured_parse_breakpoint (struct ui_out *ui, void *data) | |||
5147 | { | |||
5148 | struct captured_parse_breakpoint_args *args = data; | |||
5149 | ||||
5150 | parse_breakpoint_sals (args->arg_p, args->sals_p, args->addr_string_p, | |||
5151 | args->not_found_ptr); | |||
5152 | ||||
5153 | return GDB_RC_OK; | |||
5154 | } | |||
5155 | ||||
5156 | /* Set a breakpoint according to ARG (function, linenum or *address) | |||
5157 | flag: first bit : 0 non-temporary, 1 temporary. | |||
5158 | second bit : 0 normal breakpoint, 1 hardware breakpoint. | |||
5159 | ||||
5160 | PENDING_BP is non-NULL when this function is being called to resolve | |||
5161 | a pending breakpoint. */ | |||
5162 | ||||
5163 | static int | |||
5164 | break_command_1 (char *arg, int flag, int from_tty, struct breakpoint *pending_bp) | |||
5165 | { | |||
5166 | int tempflag, hardwareflag; | |||
5167 | struct symtabs_and_lines sals; | |||
5168 | struct expression **cond = 0; | |||
5169 | struct symtab_and_line pending_sal; | |||
5170 | char **cond_string = (char **) NULL((void*)0); | |||
5171 | char *copy_arg; | |||
5172 | char *err_msg; | |||
5173 | char *addr_start = arg; | |||
5174 | char **addr_string; | |||
5175 | struct cleanup *old_chain; | |||
5176 | struct cleanup *breakpoint_chain = NULL((void*)0); | |||
5177 | struct captured_parse_breakpoint_args parse_args; | |||
5178 | int i, rc; | |||
5179 | int pending = 0; | |||
5180 | int thread = -1; | |||
5181 | int ignore_count = 0; | |||
5182 | int not_found = 0; | |||
5183 | ||||
5184 | hardwareflag = flag & BP_HARDWAREFLAG2; | |||
5185 | tempflag = flag & BP_TEMPFLAG1; | |||
5186 | ||||
5187 | sals.sals = NULL((void*)0); | |||
5188 | sals.nelts = 0; | |||
5189 | addr_string = NULL((void*)0); | |||
5190 | ||||
5191 | parse_args.arg_p = &arg; | |||
5192 | parse_args.sals_p = &sals; | |||
5193 | parse_args.addr_string_p = &addr_string; | |||
5194 | parse_args.not_found_ptr = ¬_found; | |||
5195 | ||||
5196 | rc = catch_exceptions_with_msg (uiout, do_captured_parse_breakpoint, | |||
5197 | &parse_args, NULL((void*)0), &err_msg, | |||
5198 | RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
5199 | ||||
5200 | /* If caller is interested in rc value from parse, set value. */ | |||
5201 | ||||
5202 | if (rc != GDB_RC_OK) | |||
5203 | { | |||
5204 | /* Check for file or function not found. */ | |||
5205 | if (not_found) | |||
5206 | { | |||
5207 | /* If called to resolve pending breakpoint, just return error code. */ | |||
5208 | if (pending_bp) | |||
5209 | return rc; | |||
5210 | ||||
5211 | error_output_message (NULL((void*)0), err_msg); | |||
5212 | xfree (err_msg); | |||
5213 | ||||
5214 | /* If pending breakpoint support is turned off, throw error. */ | |||
5215 | ||||
5216 | if (pending_break_support == AUTO_BOOLEAN_FALSE) | |||
5217 | throw_exception (RETURN_ERROR); | |||
5218 | ||||
5219 | /* If pending breakpoint support is auto query and the user selects | |||
5220 | no, then simply return the error code. */ | |||
5221 | if (pending_break_support == AUTO_BOOLEAN_AUTO && | |||
5222 | !nquery ("Make breakpoint pending on future shared library load? ")) | |||
5223 | return rc; | |||
5224 | ||||
5225 | /* At this point, either the user was queried about setting a | |||
5226 | pending breakpoint and selected yes, or pending breakpoint | |||
5227 | behavior is on and thus a pending breakpoint is defaulted | |||
5228 | on behalf of the user. */ | |||
5229 | copy_arg = xstrdup (addr_start); | |||
5230 | addr_string = ©_arg; | |||
5231 | sals.nelts = 1; | |||
5232 | sals.sals = &pending_sal; | |||
5233 | pending_sal.pc = 0; | |||
5234 | pending = 1; | |||
5235 | } | |||
5236 | else | |||
5237 | return rc; | |||
5238 | } | |||
5239 | else if (!sals.nelts) | |||
5240 | return GDB_RC_FAIL; | |||
5241 | ||||
5242 | /* Create a chain of things that always need to be cleaned up. */ | |||
5243 | old_chain = make_cleanup (null_cleanup, 0); | |||
5244 | ||||
5245 | if (!pending) | |||
5246 | { | |||
5247 | /* Make sure that all storage allocated to SALS gets freed. */ | |||
5248 | make_cleanup (xfree, sals.sals); | |||
5249 | ||||
5250 | /* Cleanup the addr_string array but not its contents. */ | |||
5251 | make_cleanup (xfree, addr_string); | |||
5252 | } | |||
5253 | ||||
5254 | /* Allocate space for all the cond expressions. */ | |||
5255 | cond = xcalloc (sals.nelts, sizeof (struct expression *)); | |||
5256 | make_cleanup (xfree, cond); | |||
5257 | ||||
5258 | /* Allocate space for all the cond strings. */ | |||
5259 | cond_string = xcalloc (sals.nelts, sizeof (char **)); | |||
5260 | make_cleanup (xfree, cond_string); | |||
5261 | ||||
5262 | /* ----------------------------- SNIP ----------------------------- | |||
5263 | Anything added to the cleanup chain beyond this point is assumed | |||
5264 | to be part of a breakpoint. If the breakpoint create succeeds | |||
5265 | then the memory is not reclaimed. */ | |||
5266 | breakpoint_chain = make_cleanup (null_cleanup, 0); | |||
5267 | ||||
5268 | /* Mark the contents of the addr_string for cleanup. These go on | |||
5269 | the breakpoint_chain and only occure if the breakpoint create | |||
5270 | fails. */ | |||
5271 | for (i = 0; i < sals.nelts; i++) | |||
5272 | { | |||
5273 | if (addr_string[i] != NULL((void*)0)) | |||
5274 | make_cleanup (xfree, addr_string[i]); | |||
5275 | } | |||
5276 | ||||
5277 | /* Resolve all line numbers to PC's and verify that the addresses | |||
5278 | are ok for the target. */ | |||
5279 | if (!pending) | |||
5280 | breakpoint_sals_to_pc (&sals, addr_start); | |||
5281 | ||||
5282 | /* Verify that condition can be parsed, before setting any | |||
5283 | breakpoints. Allocate a separate condition expression for each | |||
5284 | breakpoint. */ | |||
5285 | thread = -1; /* No specific thread yet */ | |||
5286 | if (!pending) | |||
5287 | { | |||
5288 | for (i = 0; i < sals.nelts; i++) | |||
5289 | { | |||
5290 | char *tok = arg; | |||
5291 | while (tok && *tok) | |||
5292 | { | |||
5293 | char *end_tok; | |||
5294 | int toklen; | |||
5295 | char *cond_start = NULL((void*)0); | |||
5296 | char *cond_end = NULL((void*)0); | |||
5297 | while (*tok == ' ' || *tok == '\t') | |||
5298 | tok++; | |||
5299 | ||||
5300 | end_tok = tok; | |||
5301 | ||||
5302 | while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') | |||
5303 | end_tok++; | |||
5304 | ||||
5305 | toklen = end_tok - tok; | |||
5306 | ||||
5307 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) | |||
5308 | { | |||
5309 | tok = cond_start = end_tok + 1; | |||
5310 | cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), | |||
5311 | 0); | |||
5312 | make_cleanup (xfree, cond[i]); | |||
5313 | cond_end = tok; | |||
5314 | cond_string[i] = savestring (cond_start, | |||
5315 | cond_end - cond_start); | |||
5316 | make_cleanup (xfree, cond_string[i]); | |||
5317 | } | |||
5318 | else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) | |||
5319 | { | |||
5320 | char *tmptok; | |||
5321 | ||||
5322 | tok = end_tok + 1; | |||
5323 | tmptok = tok; | |||
5324 | thread = strtol (tok, &tok, 0); | |||
5325 | if (tok == tmptok) | |||
5326 | error ("Junk after thread keyword."); | |||
5327 | if (!valid_thread_id (thread)) | |||
5328 | error ("Unknown thread %d\n", thread); | |||
5329 | } | |||
5330 | else | |||
5331 | error ("Junk at end of arguments."); | |||
5332 | } | |||
5333 | } | |||
5334 | create_breakpoints (sals, addr_string, cond, cond_string, | |||
5335 | hardwareflag ? bp_hardware_breakpoint | |||
5336 | : bp_breakpoint, | |||
5337 | tempflag ? disp_del : disp_donttouch, | |||
5338 | thread, ignore_count, from_tty, | |||
5339 | pending_bp); | |||
5340 | } | |||
5341 | else | |||
5342 | { | |||
5343 | struct symtab_and_line sal; | |||
5344 | struct breakpoint *b; | |||
5345 | ||||
5346 | sal.symtab = NULL((void*)0); | |||
5347 | sal.pc = 0; | |||
5348 | ||||
5349 | make_cleanup (xfree, copy_arg); | |||
5350 | ||||
5351 | b = set_raw_breakpoint (sal, hardwareflag ? bp_hardware_breakpoint | |||
5352 | : bp_breakpoint); | |||
5353 | set_breakpoint_count (breakpoint_count + 1); | |||
5354 | b->number = breakpoint_count; | |||
5355 | b->cond = *cond; | |||
5356 | b->thread = thread; | |||
5357 | b->addr_string = *addr_string; | |||
5358 | b->cond_string = *cond_string; | |||
5359 | b->ignore_count = ignore_count; | |||
5360 | b->pending = 1; | |||
5361 | b->disposition = tempflag ? disp_del : disp_donttouch; | |||
5362 | b->from_tty = from_tty; | |||
5363 | b->flag = flag; | |||
5364 | mention (b); | |||
5365 | } | |||
5366 | ||||
5367 | if (sals.nelts > 1) | |||
5368 | { | |||
5369 | warning ("Multiple breakpoints were set."); | |||
5370 | warning ("Use the \"delete\" command to delete unwanted breakpoints."); | |||
5371 | } | |||
5372 | /* That's it. Discard the cleanups for data inserted into the | |||
5373 | breakpoint. */ | |||
5374 | discard_cleanups (breakpoint_chain); | |||
5375 | /* But cleanup everything else. */ | |||
5376 | do_cleanups (old_chain); | |||
5377 | ||||
5378 | return GDB_RC_OK; | |||
5379 | } | |||
5380 | ||||
5381 | /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function, | |||
5382 | linenum or *address) with COND and IGNORE_COUNT. */ | |||
5383 | ||||
5384 | struct captured_breakpoint_args | |||
5385 | { | |||
5386 | char *address; | |||
5387 | char *condition; | |||
5388 | int hardwareflag; | |||
5389 | int tempflag; | |||
5390 | int thread; | |||
5391 | int ignore_count; | |||
5392 | }; | |||
5393 | ||||
5394 | static int | |||
5395 | do_captured_breakpoint (void *data) | |||
5396 | { | |||
5397 | struct captured_breakpoint_args *args = data; | |||
5398 | struct symtabs_and_lines sals; | |||
5399 | struct expression **cond; | |||
5400 | struct cleanup *old_chain; | |||
5401 | struct cleanup *breakpoint_chain = NULL((void*)0); | |||
5402 | int i; | |||
5403 | char **addr_string; | |||
5404 | char **cond_string; | |||
5405 | ||||
5406 | char *address_end; | |||
5407 | ||||
5408 | /* Parse the source and lines spec. Delay check that the expression | |||
5409 | didn't contain trailing garbage until after cleanups are in | |||
5410 | place. */ | |||
5411 | sals.sals = NULL((void*)0); | |||
5412 | sals.nelts = 0; | |||
5413 | address_end = args->address; | |||
5414 | addr_string = NULL((void*)0); | |||
5415 | parse_breakpoint_sals (&address_end, &sals, &addr_string, 0); | |||
5416 | ||||
5417 | if (!sals.nelts) | |||
5418 | return GDB_RC_NONE; | |||
5419 | ||||
5420 | /* Create a chain of things at always need to be cleaned up. */ | |||
5421 | old_chain = make_cleanup (null_cleanup, 0); | |||
5422 | ||||
5423 | /* Always have a addr_string array, even if it is empty. */ | |||
5424 | make_cleanup (xfree, addr_string); | |||
5425 | ||||
5426 | /* Make sure that all storage allocated to SALS gets freed. */ | |||
5427 | make_cleanup (xfree, sals.sals); | |||
5428 | ||||
5429 | /* Allocate space for all the cond expressions. */ | |||
5430 | cond = xcalloc (sals.nelts, sizeof (struct expression *)); | |||
5431 | make_cleanup (xfree, cond); | |||
5432 | ||||
5433 | /* Allocate space for all the cond strings. */ | |||
5434 | cond_string = xcalloc (sals.nelts, sizeof (char **)); | |||
5435 | make_cleanup (xfree, cond_string); | |||
5436 | ||||
5437 | /* ----------------------------- SNIP ----------------------------- | |||
5438 | Anything added to the cleanup chain beyond this point is assumed | |||
5439 | to be part of a breakpoint. If the breakpoint create goes | |||
5440 | through then that memory is not cleaned up. */ | |||
5441 | breakpoint_chain = make_cleanup (null_cleanup, 0); | |||
5442 | ||||
5443 | /* Mark the contents of the addr_string for cleanup. These go on | |||
5444 | the breakpoint_chain and only occure if the breakpoint create | |||
5445 | fails. */ | |||
5446 | for (i = 0; i < sals.nelts; i++) | |||
5447 | { | |||
5448 | if (addr_string[i] != NULL((void*)0)) | |||
5449 | make_cleanup (xfree, addr_string[i]); | |||
5450 | } | |||
5451 | ||||
5452 | /* Wait until now before checking for garbage at the end of the | |||
5453 | address. That way cleanups can take care of freeing any | |||
5454 | memory. */ | |||
5455 | if (*address_end != '\0') | |||
5456 | error ("Garbage %s following breakpoint address", address_end); | |||
5457 | ||||
5458 | /* Resolve all line numbers to PC's. */ | |||
5459 | breakpoint_sals_to_pc (&sals, args->address); | |||
5460 | ||||
5461 | /* Verify that conditions can be parsed, before setting any | |||
5462 | breakpoints. */ | |||
5463 | for (i = 0; i < sals.nelts; i++) | |||
5464 | { | |||
5465 | if (args->condition != NULL((void*)0)) | |||
5466 | { | |||
5467 | char *tok = args->condition; | |||
5468 | cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); | |||
5469 | if (*tok != '\0') | |||
5470 | error ("Garbage %s follows condition", tok); | |||
5471 | make_cleanup (xfree, cond[i]); | |||
5472 | cond_string[i] = xstrdup (args->condition); | |||
5473 | } | |||
5474 | } | |||
5475 | ||||
5476 | create_breakpoints (sals, addr_string, cond, cond_string, | |||
5477 | args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint, | |||
5478 | args->tempflag ? disp_del : disp_donttouch, | |||
5479 | args->thread, args->ignore_count, 0/*from-tty*/, | |||
5480 | NULL((void*)0)/*pending_bp*/); | |||
5481 | ||||
5482 | /* That's it. Discard the cleanups for data inserted into the | |||
5483 | breakpoint. */ | |||
5484 | discard_cleanups (breakpoint_chain); | |||
5485 | /* But cleanup everything else. */ | |||
5486 | do_cleanups (old_chain); | |||
5487 | return GDB_RC_OK; | |||
5488 | } | |||
5489 | ||||
5490 | enum gdb_rc | |||
5491 | gdb_breakpoint (char *address, char *condition, | |||
5492 | int hardwareflag, int tempflag, | |||
5493 | int thread, int ignore_count) | |||
5494 | { | |||
5495 | struct captured_breakpoint_args args; | |||
5496 | args.address = address; | |||
5497 | args.condition = condition; | |||
5498 | args.hardwareflag = hardwareflag; | |||
5499 | args.tempflag = tempflag; | |||
5500 | args.thread = thread; | |||
5501 | args.ignore_count = ignore_count; | |||
5502 | return catch_errors (do_captured_breakpoint, &args, | |||
5503 | NULL((void*)0), RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
5504 | } | |||
5505 | ||||
5506 | ||||
5507 | static void | |||
5508 | break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty) | |||
5509 | { | |||
5510 | struct frame_info *frame; | |||
5511 | CORE_ADDR low, high, selected_pc = 0; | |||
5512 | char *extra_args = NULL((void*)0); | |||
5513 | char *level_arg; | |||
5514 | int extra_args_len = 0, if_arg = 0; | |||
5515 | ||||
5516 | if (!arg || | |||
5517 | (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t'))) | |||
5518 | { | |||
5519 | ||||
5520 | if (default_breakpoint_valid) | |||
5521 | { | |||
5522 | if (deprecated_selected_frame) | |||
5523 | { | |||
5524 | selected_pc = get_frame_pc (deprecated_selected_frame); | |||
5525 | if (arg) | |||
5526 | if_arg = 1; | |||
5527 | } | |||
5528 | else | |||
5529 | error ("No selected frame."); | |||
5530 | } | |||
5531 | else | |||
5532 | error ("No default breakpoint address now."); | |||
5533 | } | |||
5534 | else | |||
5535 | { | |||
5536 | extra_args = strchr (arg, ' '); | |||
5537 | if (extra_args) | |||
5538 | { | |||
5539 | extra_args++; | |||
5540 | extra_args_len = strlen (extra_args); | |||
5541 | level_arg = (char *) xmalloc (extra_args - arg); | |||
5542 | strncpy (level_arg, arg, extra_args - arg - 1); | |||
5543 | level_arg[extra_args - arg - 1] = '\0'; | |||
5544 | } | |||
5545 | else | |||
5546 | { | |||
5547 | level_arg = (char *) xmalloc (strlen (arg) + 1); | |||
5548 | strcpy (level_arg, arg); | |||
5549 | } | |||
5550 | ||||
5551 | frame = parse_frame_specification (level_arg); | |||
5552 | if (frame) | |||
5553 | selected_pc = get_frame_pc (frame); | |||
5554 | else | |||
5555 | selected_pc = 0; | |||
5556 | } | |||
5557 | if (if_arg) | |||
5558 | { | |||
5559 | extra_args = arg; | |||
5560 | extra_args_len = strlen (arg); | |||
5561 | } | |||
5562 | ||||
5563 | if (selected_pc) | |||
5564 | { | |||
5565 | if (find_pc_partial_function (selected_pc, (char **) NULL((void*)0), &low, &high)) | |||
5566 | { | |||
5567 | char *addr_string; | |||
5568 | if (extra_args_len) | |||
5569 | addr_string = xstrprintf ("*0x%s %s", paddr_nz (high), extra_args); | |||
5570 | else | |||
5571 | addr_string = xstrprintf ("*0x%s", paddr_nz (high)); | |||
5572 | break_command_1 (addr_string, flag, from_tty, NULL((void*)0)); | |||
5573 | xfree (addr_string); | |||
5574 | } | |||
5575 | else | |||
5576 | error ("No function contains the specified address"); | |||
5577 | } | |||
5578 | else | |||
5579 | error ("Unable to set breakpoint at procedure exit"); | |||
5580 | } | |||
5581 | ||||
5582 | ||||
5583 | static void | |||
5584 | break_at_finish_command_1 (char *arg, int flag, int from_tty) | |||
5585 | { | |||
5586 | char *addr_string, *break_string, *beg_addr_string; | |||
5587 | CORE_ADDR low, high; | |||
5588 | struct symtabs_and_lines sals; | |||
5589 | struct symtab_and_line sal; | |||
5590 | struct cleanup *old_chain; | |||
5591 | char *extra_args = NULL((void*)0); | |||
5592 | int extra_args_len = 0; | |||
5593 | int i, if_arg = 0; | |||
5594 | ||||
5595 | if (!arg || | |||
5596 | (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t'))) | |||
5597 | { | |||
5598 | if (default_breakpoint_valid) | |||
5599 | { | |||
5600 | if (deprecated_selected_frame) | |||
5601 | { | |||
5602 | addr_string = xstrprintf ("*0x%s", | |||
5603 | paddr_nz (get_frame_pc (deprecated_selected_frame))); | |||
5604 | if (arg) | |||
5605 | if_arg = 1; | |||
5606 | } | |||
5607 | else | |||
5608 | error ("No selected frame."); | |||
5609 | } | |||
5610 | else | |||
5611 | error ("No default breakpoint address now."); | |||
5612 | } | |||
5613 | else | |||
5614 | { | |||
5615 | addr_string = (char *) xmalloc (strlen (arg) + 1); | |||
5616 | strcpy (addr_string, arg); | |||
5617 | } | |||
5618 | ||||
5619 | if (if_arg) | |||
5620 | { | |||
5621 | extra_args = arg; | |||
5622 | extra_args_len = strlen (arg); | |||
5623 | } | |||
5624 | else if (arg) | |||
5625 | { | |||
5626 | /* get the stuff after the function name or address */ | |||
5627 | extra_args = strchr (arg, ' '); | |||
5628 | if (extra_args) | |||
5629 | { | |||
5630 | extra_args++; | |||
5631 | extra_args_len = strlen (extra_args); | |||
5632 | } | |||
5633 | } | |||
5634 | ||||
5635 | sals.sals = NULL((void*)0); | |||
5636 | sals.nelts = 0; | |||
5637 | ||||
5638 | beg_addr_string = addr_string; | |||
5639 | sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL((void*)0), 0, | |||
5640 | (char ***) NULL((void*)0), NULL((void*)0)); | |||
5641 | ||||
5642 | xfree (beg_addr_string); | |||
5643 | old_chain = make_cleanup (xfree, sals.sals); | |||
5644 | for (i = 0; (i < sals.nelts); i++) | |||
5645 | { | |||
5646 | sal = sals.sals[i]; | |||
5647 | if (find_pc_partial_function (sal.pc, (char **) NULL((void*)0), &low, &high)) | |||
5648 | { | |||
5649 | break_string; | |||
5650 | if (extra_args_len) | |||
5651 | break_string = xstrprintf ("*0x%s %s", paddr_nz (high), | |||
5652 | extra_args); | |||
5653 | else | |||
5654 | break_string = xstrprintf ("*0x%s", paddr_nz (high)); | |||
5655 | break_command_1 (break_string, flag, from_tty, NULL((void*)0)); | |||
5656 | xfree (break_string); | |||
5657 | } | |||
5658 | else | |||
5659 | error ("No function contains the specified address"); | |||
5660 | } | |||
5661 | if (sals.nelts > 1) | |||
5662 | { | |||
5663 | warning ("Multiple breakpoints were set.\n"); | |||
5664 | warning ("Use the \"delete\" command to delete unwanted breakpoints."); | |||
5665 | } | |||
5666 | do_cleanups (old_chain); | |||
5667 | } | |||
5668 | ||||
5669 | ||||
5670 | /* Helper function for break_command_1 and disassemble_command. */ | |||
5671 | ||||
5672 | void | |||
5673 | resolve_sal_pc (struct symtab_and_line *sal) | |||
5674 | { | |||
5675 | CORE_ADDR pc; | |||
5676 | ||||
5677 | if (sal->pc == 0 && sal->symtab != NULL((void*)0)) | |||
5678 | { | |||
5679 | if (!find_line_pc (sal->symtab, sal->line, &pc)) | |||
5680 | error ("No line %d in file \"%s\".", | |||
5681 | sal->line, sal->symtab->filename); | |||
5682 | sal->pc = pc; | |||
5683 | } | |||
5684 | ||||
5685 | if (sal->section == 0 && sal->symtab != NULL((void*)0)) | |||
5686 | { | |||
5687 | struct blockvector *bv; | |||
5688 | struct block *b; | |||
5689 | struct symbol *sym; | |||
5690 | int index; | |||
5691 | ||||
5692 | bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab); | |||
5693 | if (bv != NULL((void*)0)) | |||
5694 | { | |||
5695 | b = BLOCKVECTOR_BLOCK (bv, index)(bv)->block[index]; | |||
5696 | sym = block_function (b); | |||
5697 | if (sym != NULL((void*)0)) | |||
5698 | { | |||
5699 | fixup_symbol_section (sym, sal->symtab->objfile); | |||
5700 | sal->section = SYMBOL_BFD_SECTION (sym)(sym)->ginfo.bfd_section; | |||
5701 | } | |||
5702 | else | |||
5703 | { | |||
5704 | /* It really is worthwhile to have the section, so we'll just | |||
5705 | have to look harder. This case can be executed if we have | |||
5706 | line numbers but no functions (as can happen in assembly | |||
5707 | source). */ | |||
5708 | ||||
5709 | struct minimal_symbol *msym; | |||
5710 | ||||
5711 | msym = lookup_minimal_symbol_by_pc (sal->pc); | |||
5712 | if (msym) | |||
5713 | sal->section = SYMBOL_BFD_SECTION (msym)(msym)->ginfo.bfd_section; | |||
5714 | } | |||
5715 | } | |||
5716 | } | |||
5717 | } | |||
5718 | ||||
5719 | void | |||
5720 | break_command (char *arg, int from_tty) | |||
5721 | { | |||
5722 | break_command_1 (arg, 0, from_tty, NULL((void*)0)); | |||
5723 | } | |||
5724 | ||||
5725 | void | |||
5726 | break_at_finish_command (char *arg, int from_tty) | |||
5727 | { | |||
5728 | break_at_finish_command_1 (arg, 0, from_tty); | |||
5729 | } | |||
5730 | ||||
5731 | void | |||
5732 | break_at_finish_at_depth_command (char *arg, int from_tty) | |||
5733 | { | |||
5734 | break_at_finish_at_depth_command_1 (arg, 0, from_tty); | |||
5735 | } | |||
5736 | ||||
5737 | void | |||
5738 | tbreak_command (char *arg, int from_tty) | |||
5739 | { | |||
5740 | break_command_1 (arg, BP_TEMPFLAG1, from_tty, NULL((void*)0)); | |||
5741 | } | |||
5742 | ||||
5743 | void | |||
5744 | tbreak_at_finish_command (char *arg, int from_tty) | |||
5745 | { | |||
5746 | break_at_finish_command_1 (arg, BP_TEMPFLAG1, from_tty); | |||
5747 | } | |||
5748 | ||||
5749 | static void | |||
5750 | hbreak_command (char *arg, int from_tty) | |||
5751 | { | |||
5752 | break_command_1 (arg, BP_HARDWAREFLAG2, from_tty, NULL((void*)0)); | |||
5753 | } | |||
5754 | ||||
5755 | static void | |||
5756 | thbreak_command (char *arg, int from_tty) | |||
5757 | { | |||
5758 | break_command_1 (arg, (BP_TEMPFLAG1 | BP_HARDWAREFLAG2), from_tty, NULL((void*)0)); | |||
5759 | } | |||
5760 | ||||
5761 | static void | |||
5762 | stop_command (char *arg, int from_tty) | |||
5763 | { | |||
5764 | printf_filtered ("Specify the type of breakpoint to set.\n\ | |||
5765 | Usage: stop in <function | address>\n\ | |||
5766 | stop at <line>\n"); | |||
5767 | } | |||
5768 | ||||
5769 | static void | |||
5770 | stopin_command (char *arg, int from_tty) | |||
5771 | { | |||
5772 | int badInput = 0; | |||
5773 | ||||
5774 | if (arg == (char *) NULL((void*)0)) | |||
5775 | badInput = 1; | |||
5776 | else if (*arg != '*') | |||
5777 | { | |||
5778 | char *argptr = arg; | |||
5779 | int hasColon = 0; | |||
5780 | ||||
5781 | /* look for a ':'. If this is a line number specification, then | |||
5782 | say it is bad, otherwise, it should be an address or | |||
5783 | function/method name */ | |||
5784 | while (*argptr && !hasColon) | |||
5785 | { | |||
5786 | hasColon = (*argptr == ':'); | |||
5787 | argptr++; | |||
5788 | } | |||
5789 | ||||
5790 | if (hasColon) | |||
5791 | badInput = (*argptr != ':'); /* Not a class::method */ | |||
5792 | else | |||
5793 | badInput = isdigit (*arg); /* a simple line number */ | |||
5794 | } | |||
5795 | ||||
5796 | if (badInput) | |||
5797 | printf_filtered ("Usage: stop in <function | address>\n"); | |||
5798 | else | |||
5799 | break_command_1 (arg, 0, from_tty, NULL((void*)0)); | |||
5800 | } | |||
5801 | ||||
5802 | static void | |||
5803 | stopat_command (char *arg, int from_tty) | |||
5804 | { | |||
5805 | int badInput = 0; | |||
5806 | ||||
5807 | if (arg == (char *) NULL((void*)0) || *arg == '*') /* no line number */ | |||
5808 | badInput = 1; | |||
5809 | else | |||
5810 | { | |||
5811 | char *argptr = arg; | |||
5812 | int hasColon = 0; | |||
5813 | ||||
5814 | /* look for a ':'. If there is a '::' then get out, otherwise | |||
5815 | it is probably a line number. */ | |||
5816 | while (*argptr && !hasColon) | |||
5817 | { | |||
5818 | hasColon = (*argptr == ':'); | |||
5819 | argptr++; | |||
5820 | } | |||
5821 | ||||
5822 | if (hasColon) | |||
5823 | badInput = (*argptr == ':'); /* we have class::method */ | |||
5824 | else | |||
5825 | badInput = !isdigit (*arg); /* not a line number */ | |||
5826 | } | |||
5827 | ||||
5828 | if (badInput) | |||
5829 | printf_filtered ("Usage: stop at <line>\n"); | |||
5830 | else | |||
5831 | break_command_1 (arg, 0, from_tty, NULL((void*)0)); | |||
5832 | } | |||
5833 | ||||
5834 | /* accessflag: hw_write: watch write, | |||
5835 | hw_read: watch read, | |||
5836 | hw_access: watch access (read or write) */ | |||
5837 | static void | |||
5838 | watch_command_1 (char *arg, int accessflag, int from_tty) | |||
5839 | { | |||
5840 | struct breakpoint *b; | |||
5841 | struct symtab_and_line sal; | |||
5842 | struct expression *exp; | |||
5843 | struct block *exp_valid_block; | |||
5844 | struct value *val, *mark; | |||
5845 | struct frame_info *frame; | |||
5846 | struct frame_info *prev_frame = NULL((void*)0); | |||
5847 | char *exp_start = NULL((void*)0); | |||
5848 | char *exp_end = NULL((void*)0); | |||
5849 | char *tok, *end_tok; | |||
5850 | int toklen; | |||
5851 | char *cond_start = NULL((void*)0); | |||
5852 | char *cond_end = NULL((void*)0); | |||
5853 | struct expression *cond = NULL((void*)0); | |||
5854 | int i, other_type_used, target_resources_ok = 0; | |||
5855 | enum bptype bp_type; | |||
5856 | int mem_cnt = 0; | |||
5857 | ||||
5858 | init_sal (&sal); /* initialize to zeroes */ | |||
5859 | ||||
5860 | /* Parse arguments. */ | |||
5861 | innermost_block = NULL((void*)0); | |||
5862 | exp_start = arg; | |||
5863 | exp = parse_exp_1 (&arg, 0, 0); | |||
5864 | exp_end = arg; | |||
5865 | exp_valid_block = innermost_block; | |||
5866 | mark = value_mark (); | |||
5867 | val = evaluate_expression (exp); | |||
5868 | release_value (val); | |||
5869 | if (VALUE_LAZY (val)(val)->lazy) | |||
5870 | value_fetch_lazy (val); | |||
5871 | ||||
5872 | tok = arg; | |||
5873 | while (*tok == ' ' || *tok == '\t') | |||
5874 | tok++; | |||
5875 | end_tok = tok; | |||
5876 | ||||
5877 | while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') | |||
5878 | end_tok++; | |||
5879 | ||||
5880 | toklen = end_tok - tok; | |||
5881 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) | |||
5882 | { | |||
5883 | tok = cond_start = end_tok + 1; | |||
5884 | cond = parse_exp_1 (&tok, 0, 0); | |||
5885 | cond_end = tok; | |||
5886 | } | |||
5887 | if (*tok) | |||
5888 | error ("Junk at end of command."); | |||
5889 | ||||
5890 | if (accessflag == hw_read) | |||
5891 | bp_type = bp_read_watchpoint; | |||
5892 | else if (accessflag == hw_access) | |||
5893 | bp_type = bp_access_watchpoint; | |||
5894 | else | |||
5895 | bp_type = bp_hardware_watchpoint; | |||
5896 | ||||
5897 | mem_cnt = can_use_hardware_watchpoint (val); | |||
5898 | if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint) | |||
5899 | error ("Expression cannot be implemented with read/access watchpoint."); | |||
5900 | if (mem_cnt != 0) | |||
5901 | { | |||
5902 | i = hw_watchpoint_used_count (bp_type, &other_type_used); | |||
5903 | target_resources_ok = | |||
5904 | TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,(*current_target.to_can_use_hw_breakpoint) (bp_type, i + mem_cnt , other_type_used); | |||
5905 | other_type_used)(*current_target.to_can_use_hw_breakpoint) (bp_type, i + mem_cnt , other_type_used);; | |||
5906 | if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint) | |||
5907 | error ("Target does not support this type of hardware watchpoint."); | |||
5908 | ||||
5909 | if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint) | |||
5910 | error ("Target can only support one kind of HW watchpoint at a time."); | |||
5911 | } | |||
5912 | ||||
5913 | #if defined(HPUXHPPA) | |||
5914 | /* On HP-UX if you set a h/w | |||
5915 | watchpoint before the "run" command, the inferior dies with a e.g., | |||
5916 | SIGILL once you start it. I initially believed this was due to a | |||
5917 | bad interaction between page protection traps and the initial | |||
5918 | startup sequence by the dynamic linker. | |||
5919 | ||||
5920 | However, I tried avoiding that by having HP-UX's implementation of | |||
5921 | TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid | |||
5922 | yet, which forced slow watches before a "run" or "attach", and it | |||
5923 | still fails somewhere in the startup code. | |||
5924 | ||||
5925 | Until I figure out what's happening, I'm disallowing watches altogether | |||
5926 | before the "run" or "attach" command. We'll tell the user they must | |||
5927 | set watches after getting the program started. */ | |||
5928 | if (!target_has_execution(current_target.to_has_execution)) | |||
5929 | { | |||
5930 | warning ("can't do that without a running program; try \"break main\", \"run\" first"); | |||
5931 | return; | |||
5932 | } | |||
5933 | #endif /* HPUXHPPA */ | |||
5934 | ||||
5935 | /* Change the type of breakpoint to an ordinary watchpoint if a hardware | |||
5936 | watchpoint could not be set. */ | |||
5937 | if (!mem_cnt || target_resources_ok <= 0) | |||
5938 | bp_type = bp_watchpoint; | |||
5939 | ||||
5940 | /* Now set up the breakpoint. */ | |||
5941 | b = set_raw_breakpoint (sal, bp_type); | |||
5942 | set_breakpoint_count (breakpoint_count + 1); | |||
5943 | b->number = breakpoint_count; | |||
5944 | b->disposition = disp_donttouch; | |||
5945 | b->exp = exp; | |||
5946 | b->exp_valid_block = exp_valid_block; | |||
5947 | b->exp_string = savestring (exp_start, exp_end - exp_start); | |||
5948 | b->val = val; | |||
5949 | b->cond = cond; | |||
5950 | if (cond_start) | |||
5951 | b->cond_string = savestring (cond_start, cond_end - cond_start); | |||
5952 | else | |||
5953 | b->cond_string = 0; | |||
5954 | ||||
5955 | frame = block_innermost_frame (exp_valid_block); | |||
5956 | if (frame) | |||
5957 | { | |||
5958 | prev_frame = get_prev_frame (frame); | |||
5959 | b->watchpoint_frame = get_frame_id (frame); | |||
5960 | } | |||
5961 | else | |||
5962 | { | |||
5963 | memset (&b->watchpoint_frame, 0, sizeof (b->watchpoint_frame)); | |||
5964 | } | |||
5965 | ||||
5966 | /* If the expression is "local", then set up a "watchpoint scope" | |||
5967 | breakpoint at the point where we've left the scope of the watchpoint | |||
5968 | expression. */ | |||
5969 | if (innermost_block) | |||
5970 | { | |||
5971 | if (prev_frame) | |||
5972 | { | |||
5973 | struct breakpoint *scope_breakpoint; | |||
5974 | scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame), | |||
5975 | bp_watchpoint_scope); | |||
5976 | ||||
5977 | scope_breakpoint->enable_state = bp_enabled; | |||
5978 | ||||
5979 | /* Automatically delete the breakpoint when it hits. */ | |||
5980 | scope_breakpoint->disposition = disp_del; | |||
5981 | ||||
5982 | /* Only break in the proper frame (help with recursion). */ | |||
5983 | scope_breakpoint->frame_id = get_frame_id (prev_frame); | |||
5984 | ||||
5985 | /* Set the address at which we will stop. */ | |||
5986 | scope_breakpoint->loc->requested_address | |||
5987 | = get_frame_pc (prev_frame); | |||
5988 | scope_breakpoint->loc->address | |||
5989 | = adjust_breakpoint_address (scope_breakpoint->loc->requested_address, | |||
5990 | scope_breakpoint->type); | |||
5991 | ||||
5992 | /* The scope breakpoint is related to the watchpoint. We | |||
5993 | will need to act on them together. */ | |||
5994 | b->related_breakpoint = scope_breakpoint; | |||
5995 | } | |||
5996 | } | |||
5997 | value_free_to_mark (mark); | |||
5998 | mention (b); | |||
5999 | } | |||
6000 | ||||
6001 | /* Return count of locations need to be watched and can be handled | |||
6002 | in hardware. If the watchpoint can not be handled | |||
6003 | in hardware return zero. */ | |||
6004 | ||||
6005 | #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT) | |||
6006 | #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN)((*current_target.to_region_size_ok_for_hw_watchpoint) (LEN)) \ | |||
6007 | (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN)(*current_target.to_region_size_ok_for_hw_watchpoint) (LEN)) | |||
6008 | #endif | |||
6009 | ||||
6010 | static int | |||
6011 | can_use_hardware_watchpoint (struct value *v) | |||
6012 | { | |||
6013 | int found_memory_cnt = 0; | |||
6014 | struct value *head = v; | |||
6015 | ||||
6016 | /* Did the user specifically forbid us to use hardware watchpoints? */ | |||
6017 | if (!can_use_hw_watchpoints) | |||
6018 | return 0; | |||
6019 | ||||
6020 | /* Make sure that the value of the expression depends only upon | |||
6021 | memory contents, and values computed from them within GDB. If we | |||
6022 | find any register references or function calls, we can't use a | |||
6023 | hardware watchpoint. | |||
6024 | ||||
6025 | The idea here is that evaluating an expression generates a series | |||
6026 | of values, one holding the value of every subexpression. (The | |||
6027 | expression a*b+c has five subexpressions: a, b, a*b, c, and | |||
6028 | a*b+c.) GDB's values hold almost enough information to establish | |||
6029 | the criteria given above --- they identify memory lvalues, | |||
6030 | register lvalues, computed values, etcetera. So we can evaluate | |||
6031 | the expression, and then scan the chain of values that leaves | |||
6032 | behind to decide whether we can detect any possible change to the | |||
6033 | expression's final value using only hardware watchpoints. | |||
6034 | ||||
6035 | However, I don't think that the values returned by inferior | |||
6036 | function calls are special in any way. So this function may not | |||
6037 | notice that an expression involving an inferior function call | |||
6038 | can't be watched with hardware watchpoints. FIXME. */ | |||
6039 | for (; v; v = v->next) | |||
6040 | { | |||
6041 | if (VALUE_LVAL (v)(v)->lval == lval_memory) | |||
6042 | { | |||
6043 | if (VALUE_LAZY (v)(v)->lazy) | |||
6044 | /* A lazy memory lvalue is one that GDB never needed to fetch; | |||
6045 | we either just used its address (e.g., `a' in `a.b') or | |||
6046 | we never needed it at all (e.g., `a' in `a,b'). */ | |||
6047 | ; | |||
6048 | else | |||
6049 | { | |||
6050 | /* Ahh, memory we actually used! Check if we can cover | |||
6051 | it with hardware watchpoints. */ | |||
6052 | struct type *vtype = check_typedef (VALUE_TYPE (v)(v)->type); | |||
6053 | ||||
6054 | /* We only watch structs and arrays if user asked for it | |||
6055 | explicitly, never if they just happen to appear in a | |||
6056 | middle of some value chain. */ | |||
6057 | if (v == head | |||
6058 | || (TYPE_CODE (vtype)(vtype)->main_type->code != TYPE_CODE_STRUCT | |||
6059 | && TYPE_CODE (vtype)(vtype)->main_type->code != TYPE_CODE_ARRAY)) | |||
6060 | { | |||
6061 | CORE_ADDR vaddr = VALUE_ADDRESS (v)(v)->location.address + VALUE_OFFSET (v)(v)->offset; | |||
6062 | int len = TYPE_LENGTH (VALUE_TYPE (v))((v)->type)->length; | |||
6063 | ||||
6064 | if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len)((*current_target.to_region_size_ok_for_hw_watchpoint) (len))) | |||
6065 | return 0; | |||
6066 | else | |||
6067 | found_memory_cnt++; | |||
6068 | } | |||
6069 | } | |||
6070 | } | |||
6071 | else if (v->lval != not_lval && v->modifiable == 0) | |||
6072 | return 0; /* ??? What does this represent? */ | |||
6073 | else if (v->lval == lval_register) | |||
6074 | return 0; /* cannot watch a register with a HW watchpoint */ | |||
6075 | } | |||
6076 | ||||
6077 | /* The expression itself looks suitable for using a hardware | |||
6078 | watchpoint, but give the target machine a chance to reject it. */ | |||
6079 | return found_memory_cnt; | |||
6080 | } | |||
6081 | ||||
6082 | void | |||
6083 | watch_command_wrapper (char *arg, int from_tty) | |||
6084 | { | |||
6085 | watch_command (arg, from_tty); | |||
6086 | } | |||
6087 | ||||
6088 | static void | |||
6089 | watch_command (char *arg, int from_tty) | |||
6090 | { | |||
6091 | watch_command_1 (arg, hw_write, from_tty); | |||
6092 | } | |||
6093 | ||||
6094 | void | |||
6095 | rwatch_command_wrapper (char *arg, int from_tty) | |||
6096 | { | |||
6097 | rwatch_command (arg, from_tty); | |||
6098 | } | |||
6099 | ||||
6100 | static void | |||
6101 | rwatch_command (char *arg, int from_tty) | |||
6102 | { | |||
6103 | watch_command_1 (arg, hw_read, from_tty); | |||
6104 | } | |||
6105 | ||||
6106 | void | |||
6107 | awatch_command_wrapper (char *arg, int from_tty) | |||
6108 | { | |||
6109 | awatch_command (arg, from_tty); | |||
6110 | } | |||
6111 | ||||
6112 | static void | |||
6113 | awatch_command (char *arg, int from_tty) | |||
6114 | { | |||
6115 | watch_command_1 (arg, hw_access, from_tty); | |||
6116 | } | |||
6117 | ||||
6118 | ||||
6119 | /* Helper routines for the until_command routine in infcmd.c. Here | |||
6120 | because it uses the mechanisms of breakpoints. */ | |||
6121 | ||||
6122 | /* This function is called by fetch_inferior_event via the | |||
6123 | cmd_continuation pointer, to complete the until command. It takes | |||
6124 | care of cleaning up the temporary breakpoints set up by the until | |||
6125 | command. */ | |||
6126 | static void | |||
6127 | until_break_command_continuation (struct continuation_arg *arg) | |||
6128 | { | |||
6129 | struct cleanup *cleanups; | |||
6130 | ||||
6131 | cleanups = (struct cleanup *) arg->data.pointer; | |||
6132 | do_exec_cleanups (cleanups); | |||
6133 | } | |||
6134 | ||||
6135 | void | |||
6136 | until_break_command (char *arg, int from_tty, int anywhere) | |||
6137 | { | |||
6138 | struct symtabs_and_lines sals; | |||
6139 | struct symtab_and_line sal; | |||
6140 | struct frame_info *prev_frame = get_prev_frame (deprecated_selected_frame); | |||
6141 | struct breakpoint *breakpoint; | |||
6142 | struct cleanup *old_chain; | |||
6143 | struct continuation_arg *arg1; | |||
6144 | ||||
6145 | ||||
6146 | clear_proceed_status (); | |||
6147 | ||||
6148 | /* Set a breakpoint where the user wants it and at return from | |||
6149 | this function */ | |||
6150 | ||||
6151 | if (default_breakpoint_valid) | |||
6152 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, | |||
6153 | default_breakpoint_line, (char ***) NULL((void*)0), NULL((void*)0)); | |||
6154 | else | |||
6155 | sals = decode_line_1 (&arg, 1, (struct symtab *) NULL((void*)0), | |||
6156 | 0, (char ***) NULL((void*)0), NULL((void*)0)); | |||
6157 | ||||
6158 | if (sals.nelts != 1) | |||
6159 | error ("Couldn't get information on specified line."); | |||
6160 | ||||
6161 | sal = sals.sals[0]; | |||
6162 | xfree (sals.sals); /* malloc'd, so freed */ | |||
6163 | ||||
6164 | if (*arg) | |||
6165 | error ("Junk at end of arguments."); | |||
6166 | ||||
6167 | resolve_sal_pc (&sal); | |||
6168 | ||||
6169 | if (anywhere) | |||
6170 | /* If the user told us to continue until a specified location, | |||
6171 | we don't specify a frame at which we need to stop. */ | |||
6172 | breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_until); | |||
6173 | else | |||
6174 | /* Otherwise, specify the current frame, because we want to stop only | |||
6175 | at the very same frame. */ | |||
6176 | breakpoint = set_momentary_breakpoint (sal, | |||
6177 | get_frame_id (deprecated_selected_frame), | |||
6178 | bp_until); | |||
6179 | ||||
6180 | if (!target_can_async_p ()(current_target.to_can_async_p ())) | |||
6181 | old_chain = make_cleanup_delete_breakpoint (breakpoint); | |||
6182 | else | |||
6183 | old_chain = make_exec_cleanup_delete_breakpoint (breakpoint); | |||
6184 | ||||
6185 | /* If we are running asynchronously, and the target supports async | |||
6186 | execution, we are not waiting for the target to stop, in the call | |||
6187 | tp proceed, below. This means that we cannot delete the | |||
6188 | brekpoints until the target has actually stopped. The only place | |||
6189 | where we get a chance to do that is in fetch_inferior_event, so | |||
6190 | we must set things up for that. */ | |||
6191 | ||||
6192 | if (target_can_async_p ()(current_target.to_can_async_p ())) | |||
6193 | { | |||
6194 | /* In this case the arg for the continuation is just the point | |||
6195 | in the exec_cleanups chain from where to start doing | |||
6196 | cleanups, because all the continuation does is the cleanups in | |||
6197 | the exec_cleanup_chain. */ | |||
6198 | arg1 = | |||
6199 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); | |||
6200 | arg1->next = NULL((void*)0); | |||
6201 | arg1->data.pointer = old_chain; | |||
6202 | ||||
6203 | add_continuation (until_break_command_continuation, arg1); | |||
6204 | } | |||
6205 | ||||
6206 | /* Keep within the current frame, or in frames called by the current | |||
6207 | one. */ | |||
6208 | if (prev_frame) | |||
6209 | { | |||
6210 | sal = find_pc_line (get_frame_pc (prev_frame), 0); | |||
6211 | sal.pc = get_frame_pc (prev_frame); | |||
6212 | breakpoint = set_momentary_breakpoint (sal, get_frame_id (prev_frame), | |||
6213 | bp_until); | |||
6214 | if (!target_can_async_p ()(current_target.to_can_async_p ())) | |||
6215 | make_cleanup_delete_breakpoint (breakpoint); | |||
6216 | else | |||
6217 | make_exec_cleanup_delete_breakpoint (breakpoint); | |||
6218 | } | |||
6219 | ||||
6220 | proceed (-1, TARGET_SIGNAL_DEFAULT, 0); | |||
6221 | /* Do the cleanups now, anly if we are not running asynchronously, | |||
6222 | of if we are, but the target is still synchronous. */ | |||
6223 | if (!target_can_async_p ()(current_target.to_can_async_p ())) | |||
6224 | do_cleanups (old_chain); | |||
6225 | } | |||
6226 | ||||
6227 | static void | |||
6228 | ep_skip_leading_whitespace (char **s) | |||
6229 | { | |||
6230 | if ((s == NULL((void*)0)) || (*s == NULL((void*)0))) | |||
6231 | return; | |||
6232 | while (isspace (**s)) | |||
6233 | *s += 1; | |||
6234 | } | |||
6235 | ||||
6236 | /* This function examines a string, and attempts to find a token | |||
6237 | that might be an event name in the leading characters. If a | |||
6238 | possible match is found, a pointer to the last character of | |||
6239 | the token is returned. Else, NULL is returned. */ | |||
6240 | ||||
6241 | static char * | |||
6242 | ep_find_event_name_end (char *arg) | |||
6243 | { | |||
6244 | char *s = arg; | |||
6245 | char *event_name_end = NULL((void*)0); | |||
6246 | ||||
6247 | /* If we could depend upon the presense of strrpbrk, we'd use that... */ | |||
6248 | if (arg == NULL((void*)0)) | |||
6249 | return NULL((void*)0); | |||
6250 | ||||
6251 | /* We break out of the loop when we find a token delimiter. | |||
6252 | Basically, we're looking for alphanumerics and underscores; | |||
6253 | anything else delimites the token. */ | |||
6254 | while (*s != '\0') | |||
6255 | { | |||
6256 | if (!isalnum (*s) && (*s != '_')) | |||
6257 | break; | |||
6258 | event_name_end = s; | |||
6259 | s++; | |||
6260 | } | |||
6261 | ||||
6262 | return event_name_end; | |||
6263 | } | |||
6264 | ||||
6265 | ||||
6266 | /* This function attempts to parse an optional "if <cond>" clause | |||
6267 | from the arg string. If one is not found, it returns NULL. | |||
6268 | ||||
6269 | Else, it returns a pointer to the condition string. (It does not | |||
6270 | attempt to evaluate the string against a particular block.) And, | |||
6271 | it updates arg to point to the first character following the parsed | |||
6272 | if clause in the arg string. */ | |||
6273 | ||||
6274 | static char * | |||
6275 | ep_parse_optional_if_clause (char **arg) | |||
6276 | { | |||
6277 | char *cond_string; | |||
6278 | ||||
6279 | if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2])) | |||
6280 | return NULL((void*)0); | |||
6281 | ||||
6282 | /* Skip the "if" keyword. */ | |||
6283 | (*arg) += 2; | |||
6284 | ||||
6285 | /* Skip any extra leading whitespace, and record the start of the | |||
6286 | condition string. */ | |||
6287 | ep_skip_leading_whitespace (arg); | |||
6288 | cond_string = *arg; | |||
6289 | ||||
6290 | /* Assume that the condition occupies the remainder of the arg string. */ | |||
6291 | (*arg) += strlen (cond_string); | |||
6292 | ||||
6293 | return cond_string; | |||
6294 | } | |||
6295 | ||||
6296 | /* This function attempts to parse an optional filename from the arg | |||
6297 | string. If one is not found, it returns NULL. | |||
6298 | ||||
6299 | Else, it returns a pointer to the parsed filename. (This function | |||
6300 | makes no attempt to verify that a file of that name exists, or is | |||
6301 | accessible.) And, it updates arg to point to the first character | |||
6302 | following the parsed filename in the arg string. | |||
6303 | ||||
6304 | Note that clients needing to preserve the returned filename for | |||
6305 | future access should copy it to their own buffers. */ | |||
6306 | static char * | |||
6307 | ep_parse_optional_filename (char **arg) | |||
6308 | { | |||
6309 | static char filename[1024]; | |||
6310 | char *arg_p = *arg; | |||
6311 | int i; | |||
6312 | char c; | |||
6313 | ||||
6314 | if ((*arg_p == '\0') || isspace (*arg_p)) | |||
6315 | return NULL((void*)0); | |||
6316 | ||||
6317 | for (i = 0;; i++) | |||
6318 | { | |||
6319 | c = *arg_p; | |||
6320 | if (isspace (c)) | |||
6321 | c = '\0'; | |||
6322 | filename[i] = c; | |||
6323 | if (c == '\0') | |||
6324 | break; | |||
6325 | arg_p++; | |||
6326 | } | |||
6327 | *arg = arg_p; | |||
6328 | ||||
6329 | return filename; | |||
6330 | } | |||
6331 | ||||
6332 | /* Commands to deal with catching events, such as signals, exceptions, | |||
6333 | process start/exit, etc. */ | |||
6334 | ||||
6335 | typedef enum | |||
6336 | { | |||
6337 | catch_fork, catch_vfork | |||
6338 | } | |||
6339 | catch_fork_kind; | |||
6340 | ||||
6341 | static void | |||
6342 | catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag, | |||
6343 | int from_tty) | |||
6344 | { | |||
6345 | char *cond_string = NULL((void*)0); | |||
6346 | ||||
6347 | ep_skip_leading_whitespace (&arg); | |||
6348 | ||||
6349 | /* The allowed syntax is: | |||
6350 | catch [v]fork | |||
6351 | catch [v]fork if <cond> | |||
6352 | ||||
6353 | First, check if there's an if clause. */ | |||
6354 | cond_string = ep_parse_optional_if_clause (&arg); | |||
6355 | ||||
6356 | if ((*arg != '\0') && !isspace (*arg)) | |||
6357 | error ("Junk at end of arguments."); | |||
6358 | ||||
6359 | /* If this target supports it, create a fork or vfork catchpoint | |||
6360 | and enable reporting of such events. */ | |||
6361 | switch (fork_kind) | |||
6362 | { | |||
6363 | case catch_fork: | |||
6364 | create_fork_event_catchpoint (tempflag, cond_string); | |||
6365 | break; | |||
6366 | case catch_vfork: | |||
6367 | create_vfork_event_catchpoint (tempflag, cond_string); | |||
6368 | break; | |||
6369 | default: | |||
6370 | error ("unsupported or unknown fork kind; cannot catch it"); | |||
6371 | break; | |||
6372 | } | |||
6373 | } | |||
6374 | ||||
6375 | static void | |||
6376 | catch_exec_command_1 (char *arg, int tempflag, int from_tty) | |||
6377 | { | |||
6378 | char *cond_string = NULL((void*)0); | |||
6379 | ||||
6380 | ep_skip_leading_whitespace (&arg); | |||
6381 | ||||
6382 | /* The allowed syntax is: | |||
6383 | catch exec | |||
6384 | catch exec if <cond> | |||
6385 | ||||
6386 | First, check if there's an if clause. */ | |||
6387 | cond_string = ep_parse_optional_if_clause (&arg); | |||
6388 | ||||
6389 | if ((*arg != '\0') && !isspace (*arg)) | |||
6390 | error ("Junk at end of arguments."); | |||
6391 | ||||
6392 | /* If this target supports it, create an exec catchpoint | |||
6393 | and enable reporting of such events. */ | |||
6394 | create_exec_event_catchpoint (tempflag, cond_string); | |||
6395 | } | |||
6396 | ||||
6397 | static void | |||
6398 | catch_load_command_1 (char *arg, int tempflag, int from_tty) | |||
6399 | { | |||
6400 | char *dll_pathname = NULL((void*)0); | |||
6401 | char *cond_string = NULL((void*)0); | |||
6402 | ||||
6403 | ep_skip_leading_whitespace (&arg); | |||
6404 | ||||
6405 | /* The allowed syntax is: | |||
6406 | catch load | |||
6407 | catch load if <cond> | |||
6408 | catch load <filename> | |||
6409 | catch load <filename> if <cond> | |||
6410 | ||||
6411 | The user is not allowed to specify the <filename> after an | |||
6412 | if clause. | |||
6413 | ||||
6414 | We'll ignore the pathological case of a file named "if". | |||
6415 | ||||
6416 | First, check if there's an if clause. If so, then there | |||
6417 | cannot be a filename. */ | |||
6418 | cond_string = ep_parse_optional_if_clause (&arg); | |||
6419 | ||||
6420 | /* If there was an if clause, then there cannot be a filename. | |||
6421 | Else, there might be a filename and an if clause. */ | |||
6422 | if (cond_string == NULL((void*)0)) | |||
6423 | { | |||
6424 | dll_pathname = ep_parse_optional_filename (&arg); | |||
6425 | ep_skip_leading_whitespace (&arg); | |||
6426 | cond_string = ep_parse_optional_if_clause (&arg); | |||
6427 | } | |||
6428 | ||||
6429 | if ((*arg != '\0') && !isspace (*arg)) | |||
6430 | error ("Junk at end of arguments."); | |||
6431 | ||||
6432 | /* Create a load breakpoint that only triggers when a load of | |||
6433 | the specified dll (or any dll, if no pathname was specified) | |||
6434 | occurs. */ | |||
6435 | SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag,error ("catch of library loads not yet implemented on this platform" ) | |||
6436 | dll_pathname, cond_string)error ("catch of library loads not yet implemented on this platform" ); | |||
6437 | } | |||
6438 | ||||
6439 | static void | |||
6440 | catch_unload_command_1 (char *arg, int tempflag, int from_tty) | |||
6441 | { | |||
6442 | char *dll_pathname = NULL((void*)0); | |||
6443 | char *cond_string = NULL((void*)0); | |||
6444 | ||||
6445 | ep_skip_leading_whitespace (&arg); | |||
6446 | ||||
6447 | /* The allowed syntax is: | |||
6448 | catch unload | |||
6449 | catch unload if <cond> | |||
6450 | catch unload <filename> | |||
6451 | catch unload <filename> if <cond> | |||
6452 | ||||
6453 | The user is not allowed to specify the <filename> after an | |||
6454 | if clause. | |||
6455 | ||||
6456 | We'll ignore the pathological case of a file named "if". | |||
6457 | ||||
6458 | First, check if there's an if clause. If so, then there | |||
6459 | cannot be a filename. */ | |||
6460 | cond_string = ep_parse_optional_if_clause (&arg); | |||
6461 | ||||
6462 | /* If there was an if clause, then there cannot be a filename. | |||
6463 | Else, there might be a filename and an if clause. */ | |||
6464 | if (cond_string == NULL((void*)0)) | |||
6465 | { | |||
6466 | dll_pathname = ep_parse_optional_filename (&arg); | |||
6467 | ep_skip_leading_whitespace (&arg); | |||
6468 | cond_string = ep_parse_optional_if_clause (&arg); | |||
6469 | } | |||
6470 | ||||
6471 | if ((*arg != '\0') && !isspace (*arg)) | |||
6472 | error ("Junk at end of arguments."); | |||
6473 | ||||
6474 | /* Create an unload breakpoint that only triggers when an unload of | |||
6475 | the specified dll (or any dll, if no pathname was specified) | |||
6476 | occurs. */ | |||
6477 | SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag,error ("catch of library unloads not yet implemented on this platform" ) | |||
6478 | dll_pathname, cond_string)error ("catch of library unloads not yet implemented on this platform" ); | |||
6479 | } | |||
6480 | ||||
6481 | /* Commands to deal with catching exceptions. */ | |||
6482 | ||||
6483 | /* Set a breakpoint at the specified callback routine for an | |||
6484 | exception event callback */ | |||
6485 | ||||
6486 | static void | |||
6487 | create_exception_catchpoint (int tempflag, char *cond_string, | |||
6488 | enum exception_event_kind ex_event, | |||
6489 | struct symtab_and_line *sal) | |||
6490 | { | |||
6491 | struct breakpoint *b; | |||
6492 | int thread = -1; /* All threads. */ | |||
6493 | enum bptype bptype; | |||
6494 | ||||
6495 | if (!sal) /* no exception support? */ | |||
6496 | return; | |||
6497 | ||||
6498 | switch (ex_event) | |||
6499 | { | |||
6500 | case EX_EVENT_THROW: | |||
6501 | bptype = bp_catch_throw; | |||
6502 | break; | |||
6503 | case EX_EVENT_CATCH: | |||
6504 | bptype = bp_catch_catch; | |||
6505 | break; | |||
6506 | default: /* error condition */ | |||
6507 | error ("Internal error -- invalid catchpoint kind"); | |||
6508 | } | |||
6509 | ||||
6510 | b = set_raw_breakpoint (*sal, bptype); | |||
6511 | set_breakpoint_count (breakpoint_count + 1); | |||
6512 | b->number = breakpoint_count; | |||
6513 | b->cond = NULL((void*)0); | |||
6514 | b->cond_string = (cond_string == NULL((void*)0)) ? | |||
6515 | NULL((void*)0) : savestring (cond_string, strlen (cond_string)); | |||
6516 | b->thread = thread; | |||
6517 | b->addr_string = NULL((void*)0); | |||
6518 | b->enable_state = bp_enabled; | |||
6519 | b->disposition = tempflag ? disp_del : disp_donttouch; | |||
6520 | mention (b); | |||
6521 | } | |||
6522 | ||||
6523 | static enum print_stop_action | |||
6524 | print_exception_catchpoint (struct breakpoint *b) | |||
6525 | { | |||
6526 | annotate_catchpoint (b->number); | |||
6527 | ||||
6528 | if (strstr (b->addr_string, "throw") != NULL((void*)0)) | |||
6529 | printf_filtered ("\nCatchpoint %d (exception thrown)\n", | |||
6530 | b->number); | |||
6531 | else | |||
6532 | printf_filtered ("\nCatchpoint %d (exception caught)\n", | |||
6533 | b->number); | |||
6534 | ||||
6535 | return PRINT_SRC_AND_LOC; | |||
6536 | } | |||
6537 | ||||
6538 | static void | |||
6539 | print_one_exception_catchpoint (struct breakpoint *b, CORE_ADDR *last_addr) | |||
6540 | { | |||
6541 | if (addressprint) | |||
6542 | { | |||
6543 | annotate_field (4); | |||
6544 | ui_out_field_core_addr (uiout, "addr", b->loc->address); | |||
6545 | } | |||
6546 | annotate_field (5); | |||
6547 | *last_addr = b->loc->address; | |||
6548 | if (strstr (b->addr_string, "throw") != NULL((void*)0)) | |||
6549 | ui_out_field_string (uiout, "what", "exception throw"); | |||
6550 | else | |||
6551 | ui_out_field_string (uiout, "what", "exception catch"); | |||
6552 | } | |||
6553 | ||||
6554 | static void | |||
6555 | print_mention_exception_catchpoint (struct breakpoint *b) | |||
6556 | { | |||
6557 | if (strstr (b->addr_string, "throw") != NULL((void*)0)) | |||
6558 | printf_filtered ("Catchpoint %d (throw)", b->number); | |||
6559 | else | |||
6560 | printf_filtered ("Catchpoint %d (catch)", b->number); | |||
6561 | } | |||
6562 | ||||
6563 | static struct breakpoint_ops gnu_v3_exception_catchpoint_ops = { | |||
6564 | print_exception_catchpoint, | |||
6565 | print_one_exception_catchpoint, | |||
6566 | print_mention_exception_catchpoint | |||
6567 | }; | |||
6568 | ||||
6569 | static int | |||
6570 | handle_gnu_v3_exceptions (int tempflag, char *cond_string, | |||
6571 | enum exception_event_kind ex_event, int from_tty) | |||
6572 | { | |||
6573 | char *trigger_func_name, *nameptr; | |||
6574 | struct symtabs_and_lines sals; | |||
6575 | struct breakpoint *b; | |||
6576 | ||||
6577 | if (ex_event == EX_EVENT_CATCH) | |||
6578 | trigger_func_name = xstrdup ("__cxa_begin_catch"); | |||
6579 | else | |||
6580 | trigger_func_name = xstrdup ("__cxa_throw"); | |||
6581 | ||||
6582 | nameptr = trigger_func_name; | |||
6583 | sals = decode_line_1 (&nameptr, 1, NULL((void*)0), 0, NULL((void*)0), NULL((void*)0)); | |||
6584 | if (sals.nelts == 0) | |||
6585 | { | |||
6586 | xfree (trigger_func_name); | |||
6587 | return 0; | |||
6588 | } | |||
6589 | ||||
6590 | b = set_raw_breakpoint (sals.sals[0], bp_breakpoint); | |||
6591 | set_breakpoint_count (breakpoint_count + 1); | |||
6592 | b->number = breakpoint_count; | |||
6593 | b->cond = NULL((void*)0); | |||
6594 | b->cond_string = (cond_string == NULL((void*)0)) ? | |||
6595 | NULL((void*)0) : savestring (cond_string, strlen (cond_string)); | |||
6596 | b->thread = -1; | |||
6597 | b->addr_string = trigger_func_name; | |||
6598 | b->enable_state = bp_enabled; | |||
6599 | b->disposition = tempflag ? disp_del : disp_donttouch; | |||
6600 | b->ops = &gnu_v3_exception_catchpoint_ops; | |||
6601 | ||||
6602 | xfree (sals.sals); | |||
6603 | mention (b); | |||
6604 | return 1; | |||
6605 | } | |||
6606 | ||||
6607 | /* Deal with "catch catch" and "catch throw" commands */ | |||
6608 | ||||
6609 | static void | |||
6610 | catch_exception_command_1 (enum exception_event_kind ex_event, char *arg, | |||
6611 | int tempflag, int from_tty) | |||
6612 | { | |||
6613 | char *cond_string = NULL((void*)0); | |||
6614 | struct symtab_and_line *sal = NULL((void*)0); | |||
6615 | ||||
6616 | ep_skip_leading_whitespace (&arg); | |||
6617 | ||||
6618 | cond_string = ep_parse_optional_if_clause (&arg); | |||
6619 | ||||
6620 | if ((*arg != '\0') && !isspace (*arg)) | |||
6621 | error ("Junk at end of arguments."); | |||
6622 | ||||
6623 | if ((ex_event != EX_EVENT_THROW) && | |||
6624 | (ex_event != EX_EVENT_CATCH)) | |||
6625 | error ("Unsupported or unknown exception event; cannot catch it"); | |||
6626 | ||||
6627 | if (handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty)) | |||
6628 | return; | |||
6629 | ||||
6630 | /* See if we can find a callback routine */ | |||
6631 | sal = target_enable_exception_callback (ex_event, 1)(*current_target.to_enable_exception_callback) (ex_event, 1); | |||
6632 | ||||
6633 | if (sal) | |||
6634 | { | |||
6635 | /* We have callbacks from the runtime system for exceptions. | |||
6636 | Set a breakpoint on the sal found, if no errors */ | |||
6637 | if (sal != (struct symtab_and_line *) -1) | |||
6638 | create_exception_catchpoint (tempflag, cond_string, ex_event, sal); | |||
6639 | else | |||
6640 | return; /* something went wrong with setting up callbacks */ | |||
6641 | } | |||
6642 | ||||
6643 | warning ("Unsupported with this platform/compiler combination."); | |||
6644 | } | |||
6645 | ||||
6646 | /* Cover routine to allow wrapping target_enable_exception_catchpoints | |||
6647 | inside a catch_errors */ | |||
6648 | ||||
6649 | static int | |||
6650 | cover_target_enable_exception_callback (void *arg) | |||
6651 | { | |||
6652 | args_for_catchpoint_enable *args = arg; | |||
6653 | struct symtab_and_line *sal; | |||
6654 | sal = target_enable_exception_callback (args->kind, args->enable_p)(*current_target.to_enable_exception_callback) (args->kind , args->enable_p); | |||
6655 | if (sal == NULL((void*)0)) | |||
6656 | return 0; | |||
6657 | else if (sal == (struct symtab_and_line *) -1) | |||
6658 | return -1; | |||
6659 | else | |||
6660 | return 1; /*is valid */ | |||
6661 | } | |||
6662 | ||||
6663 | static void | |||
6664 | catch_command_1 (char *arg, int tempflag, int from_tty) | |||
6665 | { | |||
6666 | ||||
6667 | /* The first argument may be an event name, such as "start" or "load". | |||
6668 | If so, then handle it as such. If it doesn't match an event name, | |||
6669 | then attempt to interpret it as an exception name. (This latter is | |||
6670 | the v4.16-and-earlier GDB meaning of the "catch" command.) | |||
6671 | ||||
6672 | First, try to find the bounds of what might be an event name. */ | |||
6673 | char *arg1_start = arg; | |||
6674 | char *arg1_end; | |||
6675 | int arg1_length; | |||
6676 | ||||
6677 | if (arg1_start == NULL((void*)0)) | |||
6678 | { | |||
6679 | /* Old behaviour was to use pre-v-4.16 syntax */ | |||
6680 | /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */ | |||
6681 | /* return; */ | |||
6682 | /* Now, this is not allowed */ | |||
6683 | error ("Catch requires an event name."); | |||
6684 | ||||
6685 | } | |||
6686 | arg1_end = ep_find_event_name_end (arg1_start); | |||
6687 | if (arg1_end == NULL((void*)0)) | |||
6688 | error ("catch requires an event"); | |||
6689 | arg1_length = arg1_end + 1 - arg1_start; | |||
6690 | ||||
6691 | /* Try to match what we found against known event names. */ | |||
6692 | if (strncmp (arg1_start, "signal", arg1_length) == 0) | |||
6693 | { | |||
6694 | error ("Catch of signal not yet implemented"); | |||
6695 | } | |||
6696 | else if (strncmp (arg1_start, "catch", arg1_length) == 0) | |||
6697 | { | |||
6698 | catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1, | |||
6699 | tempflag, from_tty); | |||
6700 | } | |||
6701 | else if (strncmp (arg1_start, "throw", arg1_length) == 0) | |||
6702 | { | |||
6703 | catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1, | |||
6704 | tempflag, from_tty); | |||
6705 | } | |||
6706 | else if (strncmp (arg1_start, "thread_start", arg1_length) == 0) | |||
6707 | { | |||
6708 | error ("Catch of thread_start not yet implemented"); | |||
6709 | } | |||
6710 | else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0) | |||
6711 | { | |||
6712 | error ("Catch of thread_exit not yet implemented"); | |||
6713 | } | |||
6714 | else if (strncmp (arg1_start, "thread_join", arg1_length) == 0) | |||
6715 | { | |||
6716 | error ("Catch of thread_join not yet implemented"); | |||
6717 | } | |||
6718 | else if (strncmp (arg1_start, "start", arg1_length) == 0) | |||
6719 | { | |||
6720 | error ("Catch of start not yet implemented"); | |||
6721 | } | |||
6722 | else if (strncmp (arg1_start, "exit", arg1_length) == 0) | |||
6723 | { | |||
6724 | error ("Catch of exit not yet implemented"); | |||
6725 | } | |||
6726 | else if (strncmp (arg1_start, "fork", arg1_length) == 0) | |||
6727 | { | |||
6728 | catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty); | |||
6729 | } | |||
6730 | else if (strncmp (arg1_start, "vfork", arg1_length) == 0) | |||
6731 | { | |||
6732 | catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty); | |||
6733 | } | |||
6734 | else if (strncmp (arg1_start, "exec", arg1_length) == 0) | |||
6735 | { | |||
6736 | catch_exec_command_1 (arg1_end + 1, tempflag, from_tty); | |||
6737 | } | |||
6738 | else if (strncmp (arg1_start, "load", arg1_length) == 0) | |||
6739 | { | |||
6740 | catch_load_command_1 (arg1_end + 1, tempflag, from_tty); | |||
6741 | } | |||
6742 | else if (strncmp (arg1_start, "unload", arg1_length) == 0) | |||
6743 | { | |||
6744 | catch_unload_command_1 (arg1_end + 1, tempflag, from_tty); | |||
6745 | } | |||
6746 | else if (strncmp (arg1_start, "stop", arg1_length) == 0) | |||
6747 | { | |||
6748 | error ("Catch of stop not yet implemented"); | |||
6749 | } | |||
6750 | ||||
6751 | /* This doesn't appear to be an event name */ | |||
6752 | ||||
6753 | else | |||
6754 | { | |||
6755 | /* Pre-v.4.16 behaviour was to treat the argument | |||
6756 | as the name of an exception */ | |||
6757 | /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */ | |||
6758 | /* Now this is not allowed */ | |||
6759 | error ("Unknown event kind specified for catch"); | |||
6760 | ||||
6761 | } | |||
6762 | } | |||
6763 | ||||
6764 | /* Used by the gui, could be made a worker for other things. */ | |||
6765 | ||||
6766 | struct breakpoint * | |||
6767 | set_breakpoint_sal (struct symtab_and_line sal) | |||
6768 | { | |||
6769 | struct breakpoint *b; | |||
6770 | b = set_raw_breakpoint (sal, bp_breakpoint); | |||
6771 | set_breakpoint_count (breakpoint_count + 1); | |||
6772 | b->number = breakpoint_count; | |||
6773 | b->cond = 0; | |||
6774 | b->thread = -1; | |||
6775 | return b; | |||
6776 | } | |||
6777 | ||||
6778 | static void | |||
6779 | catch_command (char *arg, int from_tty) | |||
6780 | { | |||
6781 | catch_command_1 (arg, 0, from_tty); | |||
6782 | } | |||
6783 | ||||
6784 | ||||
6785 | static void | |||
6786 | tcatch_command (char *arg, int from_tty) | |||
6787 | { | |||
6788 | catch_command_1 (arg, 1, from_tty); | |||
6789 | } | |||
6790 | ||||
6791 | /* Delete breakpoints by address or line. */ | |||
6792 | ||||
6793 | static void | |||
6794 | clear_command (char *arg, int from_tty) | |||
6795 | { | |||
6796 | struct breakpoint *b, *tmp, *prev, *found; | |||
6797 | int default_match; | |||
6798 | struct symtabs_and_lines sals; | |||
6799 | struct symtab_and_line sal; | |||
6800 | int i; | |||
6801 | ||||
6802 | if (arg) | |||
| ||||
6803 | { | |||
6804 | sals = decode_line_spec (arg, 1); | |||
6805 | default_match = 0; | |||
6806 | } | |||
6807 | else | |||
6808 | { | |||
6809 | sals.sals = (struct symtab_and_line *) | |||
6810 | xmalloc (sizeof (struct symtab_and_line)); | |||
6811 | make_cleanup (xfree, sals.sals); | |||
6812 | init_sal (&sal); /* initialize to zeroes */ | |||
6813 | sal.line = default_breakpoint_line; | |||
6814 | sal.symtab = default_breakpoint_symtab; | |||
6815 | sal.pc = default_breakpoint_address; | |||
6816 | if (sal.symtab == 0) | |||
6817 | error ("No source file specified."); | |||
6818 | ||||
6819 | sals.sals[0] = sal; | |||
6820 | sals.nelts = 1; | |||
6821 | ||||
6822 | default_match = 1; | |||
6823 | } | |||
6824 | ||||
6825 | /* For each line spec given, delete bps which correspond | |||
6826 | to it. Do it in two passes, solely to preserve the current | |||
6827 | behavior that from_tty is forced true if we delete more than | |||
6828 | one breakpoint. */ | |||
6829 | ||||
6830 | found = NULL((void*)0); | |||
6831 | for (i = 0; i < sals.nelts; i++) | |||
6832 | { | |||
6833 | /* If exact pc given, clear bpts at that pc. | |||
6834 | If line given (pc == 0), clear all bpts on specified line. | |||
6835 | If defaulting, clear all bpts on default line | |||
6836 | or at default pc. | |||
6837 | ||||
6838 | defaulting sal.pc != 0 tests to do | |||
6839 | ||||
6840 | 0 1 pc | |||
6841 | 1 1 pc _and_ line | |||
6842 | 0 0 line | |||
6843 | 1 0 <can't happen> */ | |||
6844 | ||||
6845 | sal = sals.sals[i]; | |||
6846 | prev = NULL((void*)0); | |||
6847 | ||||
6848 | /* Find all matching breakpoints, remove them from the | |||
6849 | breakpoint chain, and add them to the 'found' chain. */ | |||
6850 | ALL_BREAKPOINTS_SAFE (b, tmp)for (b = breakpoint_chain; b ? (tmp=b->next, 1): 0; b = tmp ) | |||
6851 | { | |||
6852 | /* Are we going to delete b? */ | |||
6853 | if (b->type != bp_none | |||
6854 | && b->type != bp_watchpoint | |||
6855 | && b->type != bp_hardware_watchpoint | |||
6856 | && b->type != bp_read_watchpoint | |||
6857 | && b->type != bp_access_watchpoint | |||
6858 | /* Not if b is a watchpoint of any sort... */ | |||
6859 | && (((sal.pc && (b->loc->address == sal.pc)) | |||
6860 | && (!section_is_overlay (b->loc->section) | |||
6861 | || b->loc->section == sal.section)) | |||
6862 | /* Yes, if sal.pc matches b (modulo overlays). */ | |||
6863 | || ((default_match || (0 == sal.pc)) | |||
6864 | && b->source_file != NULL((void*)0) | |||
6865 | && sal.symtab != NULL((void*)0) | |||
6866 | && strcmp (b->source_file, sal.symtab->filename) == 0 | |||
6867 | && b->line_number == sal.line))) | |||
6868 | /* Yes, if sal source file and line matches b. */ | |||
6869 | { | |||
6870 | /* Remove it from breakpoint_chain... */ | |||
6871 | if (b == breakpoint_chain) | |||
6872 | { | |||
6873 | /* b is at the head of the list */ | |||
6874 | breakpoint_chain = b->next; | |||
6875 | } | |||
6876 | else | |||
6877 | { | |||
6878 | prev->next = b->next; | |||
| ||||
6879 | } | |||
6880 | /* And add it to 'found' chain. */ | |||
6881 | b->next = found; | |||
6882 | found = b; | |||
6883 | } | |||
6884 | else | |||
6885 | { | |||
6886 | /* Keep b, and keep a pointer to it. */ | |||
6887 | prev = b; | |||
6888 | } | |||
6889 | } | |||
6890 | } | |||
6891 | /* Now go thru the 'found' chain and delete them. */ | |||
6892 | if (found == 0) | |||
6893 | { | |||
6894 | if (arg) | |||
6895 | error ("No breakpoint at %s.", arg); | |||
6896 | else | |||
6897 | error ("No breakpoint at this line."); | |||
6898 | } | |||
6899 | ||||
6900 | if (found->next) | |||
6901 | from_tty = 1; /* Always report if deleted more than one */ | |||
6902 | if (from_tty) | |||
6903 | printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : ""); | |||
6904 | breakpoints_changed (); | |||
6905 | while (found) | |||
6906 | { | |||
6907 | if (from_tty) | |||
6908 | printf_unfiltered ("%d ", found->number); | |||
6909 | tmp = found->next; | |||
6910 | delete_breakpoint (found); | |||
6911 | found = tmp; | |||
6912 | } | |||
6913 | if (from_tty) | |||
6914 | putchar_unfiltered ('\n'); | |||
6915 | } | |||
6916 | ||||
6917 | /* Delete breakpoint in BS if they are `delete' breakpoints and | |||
6918 | all breakpoints that are marked for deletion, whether hit or not. | |||
6919 | This is called after any breakpoint is hit, or after errors. */ | |||
6920 | ||||
6921 | void | |||
6922 | breakpoint_auto_delete (bpstat bs) | |||
6923 | { | |||
6924 | struct breakpoint *b, *temp; | |||
6925 | ||||
6926 | for (; bs; bs = bs->next) | |||
6927 | if (bs->breakpoint_at && bs->breakpoint_at->disposition == disp_del | |||
6928 | && bs->stop) | |||
6929 | delete_breakpoint (bs->breakpoint_at); | |||
6930 | ||||
6931 | ALL_BREAKPOINTS_SAFE (b, temp)for (b = breakpoint_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
6932 | { | |||
6933 | if (b->disposition == disp_del_at_next_stop) | |||
6934 | delete_breakpoint (b); | |||
6935 | } | |||
6936 | } | |||
6937 | ||||
6938 | /* Delete a breakpoint and clean up all traces of it in the data | |||
6939 | structures. */ | |||
6940 | ||||
6941 | void | |||
6942 | delete_breakpoint (struct breakpoint *bpt) | |||
6943 | { | |||
6944 | struct breakpoint *b; | |||
6945 | bpstat bs; | |||
6946 | struct bp_location *loc; | |||
6947 | ||||
6948 | if (bpt == NULL((void*)0)) | |||
6949 | error ("Internal error (attempted to delete a NULL breakpoint)"); | |||
6950 | ||||
6951 | ||||
6952 | /* Has this bp already been deleted? This can happen because multiple | |||
6953 | lists can hold pointers to bp's. bpstat lists are especial culprits. | |||
6954 | ||||
6955 | One example of this happening is a watchpoint's scope bp. When the | |||
6956 | scope bp triggers, we notice that the watchpoint is out of scope, and | |||
6957 | delete it. We also delete its scope bp. But the scope bp is marked | |||
6958 | "auto-deleting", and is already on a bpstat. That bpstat is then | |||
6959 | checked for auto-deleting bp's, which are deleted. | |||
6960 | ||||
6961 | A real solution to this problem might involve reference counts in bp's, | |||
6962 | and/or giving them pointers back to their referencing bpstat's, and | |||
6963 | teaching delete_breakpoint to only free a bp's storage when no more | |||
6964 | references were extent. A cheaper bandaid was chosen. */ | |||
6965 | if (bpt->type == bp_none) | |||
6966 | return; | |||
6967 | ||||
6968 | if (deprecated_delete_breakpoint_hook) | |||
6969 | deprecated_delete_breakpoint_hook (bpt); | |||
6970 | breakpoint_delete_event (bpt->number); | |||
6971 | ||||
6972 | if (bpt->loc->inserted) | |||
6973 | remove_breakpoint (bpt->loc, mark_inserted); | |||
6974 | ||||
6975 | free_valchain (bpt->loc); | |||
6976 | ||||
6977 | if (breakpoint_chain == bpt) | |||
6978 | breakpoint_chain = bpt->next; | |||
6979 | ||||
6980 | if (bp_location_chain == bpt->loc) | |||
6981 | bp_location_chain = bpt->loc->next; | |||
6982 | ||||
6983 | /* If we have callback-style exception catchpoints, don't go through | |||
6984 | the adjustments to the C++ runtime library etc. if the inferior | |||
6985 | isn't actually running. target_enable_exception_callback for a | |||
6986 | null target ops vector gives an undesirable error message, so we | |||
6987 | check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's | |||
6988 | exceptions are supported in this way, it's OK for now. FIXME */ | |||
6989 | if (ep_is_exception_catchpoint (bpt) && target_has_execution(current_target.to_has_execution)) | |||
6990 | { | |||
6991 | /* Format possible error msg */ | |||
6992 | char *message = xstrprintf ("Error in deleting catchpoint %d:\n", | |||
6993 | bpt->number); | |||
6994 | struct cleanup *cleanups = make_cleanup (xfree, message); | |||
6995 | args_for_catchpoint_enable args; | |||
6996 | args.kind = bpt->type == bp_catch_catch ? | |||
6997 | EX_EVENT_CATCH : EX_EVENT_THROW; | |||
6998 | args.enable_p = 0; | |||
6999 | catch_errors (cover_target_enable_exception_callback, &args, | |||
7000 | message, RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
7001 | do_cleanups (cleanups); | |||
7002 | } | |||
7003 | ||||
7004 | ||||
7005 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
7006 | if (b->next == bpt) | |||
7007 | { | |||
7008 | b->next = bpt->next; | |||
7009 | break; | |||
7010 | } | |||
7011 | ||||
7012 | ALL_BP_LOCATIONS (loc)for (loc = bp_location_chain; loc; loc = loc->next) | |||
7013 | if (loc->next == bpt->loc) | |||
7014 | { | |||
7015 | loc->next = bpt->loc->next; | |||
7016 | break; | |||
7017 | } | |||
7018 | ||||
7019 | check_duplicates (bpt); | |||
7020 | /* If this breakpoint was inserted, and there is another breakpoint | |||
7021 | at the same address, we need to insert the other breakpoint. */ | |||
7022 | if (bpt->loc->inserted | |||
7023 | && bpt->type != bp_hardware_watchpoint | |||
7024 | && bpt->type != bp_read_watchpoint | |||
7025 | && bpt->type != bp_access_watchpoint | |||
7026 | && bpt->type != bp_catch_fork | |||
7027 | && bpt->type != bp_catch_vfork | |||
7028 | && bpt->type != bp_catch_exec) | |||
7029 | { | |||
7030 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
7031 | if (b->loc->address == bpt->loc->address | |||
7032 | && b->loc->section == bpt->loc->section | |||
7033 | && !b->loc->duplicate | |||
7034 | && b->enable_state != bp_disabled | |||
7035 | && b->enable_state != bp_shlib_disabled | |||
7036 | && b->enable_state != bp_startup_disabled | |||
7037 | && !b->pending | |||
7038 | && b->enable_state != bp_call_disabled) | |||
7039 | { | |||
7040 | int val; | |||
7041 | ||||
7042 | /* We should never reach this point if there is a permanent | |||
7043 | breakpoint at the same address as the one being deleted. | |||
7044 | If there is a permanent breakpoint somewhere, it should | |||
7045 | always be the only one inserted. */ | |||
7046 | if (b->enable_state == bp_permanent) | |||
7047 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/breakpoint.c", __LINE__7047, | |||
7048 | "another breakpoint was inserted on top of " | |||
7049 | "a permanent breakpoint"); | |||
7050 | ||||
7051 | if (b->type == bp_hardware_breakpoint) | |||
7052 | val = target_insert_hw_breakpoint (b->loc->address, b->loc->shadow_contents)(*current_target.to_insert_hw_breakpoint) (b->loc->address , b->loc->shadow_contents); | |||
7053 | else | |||
7054 | val = target_insert_breakpoint (b->loc->address, b->loc->shadow_contents)(*current_target.to_insert_breakpoint) (b->loc->address , b->loc->shadow_contents); | |||
7055 | ||||
7056 | /* If there was an error in the insert, print a message, then stop execution. */ | |||
7057 | if (val != 0) | |||
7058 | { | |||
7059 | struct ui_file *tmp_error_stream = mem_fileopen (); | |||
7060 | make_cleanup_ui_file_delete (tmp_error_stream); | |||
7061 | ||||
7062 | ||||
7063 | if (b->type == bp_hardware_breakpoint) | |||
7064 | { | |||
7065 | fprintf_unfiltered (tmp_error_stream, | |||
7066 | "Cannot insert hardware breakpoint %d.\n" | |||
7067 | "You may have requested too many hardware breakpoints.\n", | |||
7068 | b->number); | |||
7069 | } | |||
7070 | else | |||
7071 | { | |||
7072 | fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number); | |||
7073 | fprintf_filtered (tmp_error_stream, "Error accessing memory address "); | |||
7074 | print_address_numeric (b->loc->address, 1, tmp_error_stream); | |||
7075 | fprintf_filtered (tmp_error_stream, ": %s.\n", | |||
7076 | safe_strerror (val)); | |||
7077 | } | |||
7078 | ||||
7079 | fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process."); | |||
7080 | target_terminal_ours_for_output ()(*current_target.to_terminal_ours_for_output) (); | |||
7081 | error_stream(tmp_error_stream); | |||
7082 | } | |||
7083 | else | |||
7084 | b->loc->inserted = 1; | |||
7085 | } | |||
7086 | } | |||
7087 | ||||
7088 | free_command_lines (&bpt->commands); | |||
7089 | if (bpt->cond) | |||
7090 | xfree (bpt->cond); | |||
7091 | if (bpt->cond_string != NULL((void*)0)) | |||
7092 | xfree (bpt->cond_string); | |||
7093 | if (bpt->addr_string != NULL((void*)0)) | |||
7094 | xfree (bpt->addr_string); | |||
7095 | if (bpt->exp != NULL((void*)0)) | |||
7096 | xfree (bpt->exp); | |||
7097 | if (bpt->exp_string != NULL((void*)0)) | |||
7098 | xfree (bpt->exp_string); | |||
7099 | if (bpt->val != NULL((void*)0)) | |||
7100 | value_free (bpt->val)xfree (bpt->val); | |||
7101 | if (bpt->source_file != NULL((void*)0)) | |||
7102 | xfree (bpt->source_file); | |||
7103 | if (bpt->dll_pathname != NULL((void*)0)) | |||
7104 | xfree (bpt->dll_pathname); | |||
7105 | if (bpt->triggered_dll_pathname != NULL((void*)0)) | |||
7106 | xfree (bpt->triggered_dll_pathname); | |||
7107 | if (bpt->exec_pathname != NULL((void*)0)) | |||
7108 | xfree (bpt->exec_pathname); | |||
7109 | ||||
7110 | /* Be sure no bpstat's are pointing at it after it's been freed. */ | |||
7111 | /* FIXME, how can we find all bpstat's? | |||
7112 | We just check stop_bpstat for now. */ | |||
7113 | for (bs = stop_bpstat; bs; bs = bs->next) | |||
7114 | if (bs->breakpoint_at == bpt) | |||
7115 | { | |||
7116 | bs->breakpoint_at = NULL((void*)0); | |||
7117 | bs->old_val = NULL((void*)0); | |||
7118 | /* bs->commands will be freed later. */ | |||
7119 | } | |||
7120 | /* On the chance that someone will soon try again to delete this same | |||
7121 | bp, we mark it as deleted before freeing its storage. */ | |||
7122 | bpt->type = bp_none; | |||
7123 | ||||
7124 | xfree (bpt->loc); | |||
7125 | xfree (bpt); | |||
7126 | } | |||
7127 | ||||
7128 | static void | |||
7129 | do_delete_breakpoint_cleanup (void *b) | |||
7130 | { | |||
7131 | delete_breakpoint (b); | |||
7132 | } | |||
7133 | ||||
7134 | struct cleanup * | |||
7135 | make_cleanup_delete_breakpoint (struct breakpoint *b) | |||
7136 | { | |||
7137 | return make_cleanup (do_delete_breakpoint_cleanup, b); | |||
7138 | } | |||
7139 | ||||
7140 | struct cleanup * | |||
7141 | make_exec_cleanup_delete_breakpoint (struct breakpoint *b) | |||
7142 | { | |||
7143 | return make_exec_cleanup (do_delete_breakpoint_cleanup, b); | |||
7144 | } | |||
7145 | ||||
7146 | void | |||
7147 | delete_command (char *arg, int from_tty) | |||
7148 | { | |||
7149 | struct breakpoint *b, *temp; | |||
7150 | ||||
7151 | dont_repeat (); | |||
7152 | ||||
7153 | if (arg == 0) | |||
7154 | { | |||
7155 | int breaks_to_delete = 0; | |||
7156 | ||||
7157 | /* Delete all breakpoints if no argument. | |||
7158 | Do not delete internal or call-dummy breakpoints, these | |||
7159 | have to be deleted with an explicit breakpoint number argument. */ | |||
7160 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
7161 | { | |||
7162 | if (b->type != bp_call_dummy && | |||
7163 | b->type != bp_shlib_event && | |||
7164 | b->type != bp_thread_event && | |||
7165 | b->type != bp_overlay_event && | |||
7166 | b->number >= 0) | |||
7167 | breaks_to_delete = 1; | |||
7168 | } | |||
7169 | ||||
7170 | /* Ask user only if there are some breakpoints to delete. */ | |||
7171 | if (!from_tty | |||
7172 | || (breaks_to_delete && query ("Delete all breakpoints? "))) | |||
7173 | { | |||
7174 | ALL_BREAKPOINTS_SAFE (b, temp)for (b = breakpoint_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
7175 | { | |||
7176 | if (b->type != bp_call_dummy && | |||
7177 | b->type != bp_shlib_event && | |||
7178 | b->type != bp_thread_event && | |||
7179 | b->type != bp_overlay_event && | |||
7180 | b->number >= 0) | |||
7181 | delete_breakpoint (b); | |||
7182 | } | |||
7183 | } | |||
7184 | } | |||
7185 | else | |||
7186 | map_breakpoint_numbers (arg, delete_breakpoint); | |||
7187 | } | |||
7188 | ||||
7189 | /* Reset a breakpoint given it's struct breakpoint * BINT. | |||
7190 | The value we return ends up being the return value from catch_errors. | |||
7191 | Unused in this case. */ | |||
7192 | ||||
7193 | static int | |||
7194 | breakpoint_re_set_one (void *bint) | |||
7195 | { | |||
7196 | /* get past catch_errs */ | |||
7197 | struct breakpoint *b = (struct breakpoint *) bint; | |||
7198 | struct value *mark; | |||
7199 | int i; | |||
7200 | int not_found; | |||
7201 | int *not_found_ptr = NULL((void*)0); | |||
7202 | struct symtabs_and_lines sals; | |||
7203 | char *s; | |||
7204 | enum enable_state save_enable; | |||
7205 | ||||
7206 | switch (b->type) | |||
7207 | { | |||
7208 | case bp_none: | |||
7209 | warning ("attempted to reset apparently deleted breakpoint #%d?", | |||
7210 | b->number); | |||
7211 | return 0; | |||
7212 | case bp_breakpoint: | |||
7213 | case bp_hardware_breakpoint: | |||
7214 | case bp_catch_load: | |||
7215 | case bp_catch_unload: | |||
7216 | if (b->addr_string == NULL((void*)0)) | |||
7217 | { | |||
7218 | /* Anything without a string can't be re-set. */ | |||
7219 | delete_breakpoint (b); | |||
7220 | return 0; | |||
7221 | } | |||
7222 | /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote: | |||
7223 | ||||
7224 | ``And a hack it is, although Apple's Darwin version of GDB | |||
7225 | contains an almost identical hack to implement a "future | |||
7226 | break" command. It seems to work in many real world cases, | |||
7227 | but it is easy to come up with a test case where the patch | |||
7228 | doesn't help at all.'' | |||
7229 | ||||
7230 | ``It seems that the way GDB implements breakpoints - in - | |||
7231 | shared - libraries was designed for a.out shared library | |||
7232 | systems (SunOS 4) where shared libraries were loaded at a | |||
7233 | fixed address in memory. Since ELF shared libraries can (and | |||
7234 | will) be loaded at any address in memory, things break. | |||
7235 | Fixing this is not trivial. Therefore, I'm not sure whether | |||
7236 | we should add this hack to the branch only. I cannot | |||
7237 | guarantee that things will be fixed on the trunk in the near | |||
7238 | future.'' | |||
7239 | ||||
7240 | In case we have a problem, disable this breakpoint. We'll | |||
7241 | restore its status if we succeed. Don't disable a | |||
7242 | shlib_disabled breakpoint though. There's a fair chance we | |||
7243 | can't re-set it if the shared library it's in hasn't been | |||
7244 | loaded yet. */ | |||
7245 | ||||
7246 | if (b->pending) | |||
7247 | break; | |||
7248 | ||||
7249 | save_enable = b->enable_state; | |||
7250 | if (b->enable_state != bp_shlib_disabled | |||
7251 | && b->enable_state != bp_startup_disabled) | |||
7252 | b->enable_state = bp_disabled; | |||
7253 | else | |||
7254 | /* If resetting a shlib-disabled breakpoint, we don't want to | |||
7255 | see an error message if it is not found since we will expect | |||
7256 | this to occur until the shared library is finally reloaded. | |||
7257 | We accomplish this by giving decode_line_1 a pointer to use | |||
7258 | for silent notification that the symbol is not found. */ | |||
7259 | not_found_ptr = ¬_found; | |||
7260 | ||||
7261 | set_language (b->language); | |||
7262 | input_radix = b->input_radix; | |||
7263 | s = b->addr_string; | |||
7264 | sals = decode_line_1 (&s, 1, (struct symtab *) NULL((void*)0), 0, (char ***) NULL((void*)0), | |||
7265 | not_found_ptr); | |||
7266 | for (i = 0; i < sals.nelts; i++) | |||
7267 | { | |||
7268 | resolve_sal_pc (&sals.sals[i]); | |||
7269 | ||||
7270 | /* Reparse conditions, they might contain references to the | |||
7271 | old symtab. */ | |||
7272 | if (b->cond_string != NULL((void*)0)) | |||
7273 | { | |||
7274 | s = b->cond_string; | |||
7275 | if (b->cond) | |||
7276 | { | |||
7277 | xfree (b->cond); | |||
7278 | /* Avoid re-freeing b->exp if an error during the call | |||
7279 | to parse_exp_1. */ | |||
7280 | b->cond = NULL((void*)0); | |||
7281 | } | |||
7282 | b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); | |||
7283 | } | |||
7284 | ||||
7285 | /* We need to re-set the breakpoint if the address changes... */ | |||
7286 | if (b->loc->address != sals.sals[i].pc | |||
7287 | /* ...or new and old breakpoints both have source files, and | |||
7288 | the source file name or the line number changes... */ | |||
7289 | || (b->source_file != NULL((void*)0) | |||
7290 | && sals.sals[i].symtab != NULL((void*)0) | |||
7291 | && (strcmp (b->source_file, sals.sals[i].symtab->filename) != 0 | |||
7292 | || b->line_number != sals.sals[i].line) | |||
7293 | ) | |||
7294 | /* ...or we switch between having a source file and not having | |||
7295 | one. */ | |||
7296 | || ((b->source_file == NULL((void*)0)) != (sals.sals[i].symtab == NULL((void*)0))) | |||
7297 | ) | |||
7298 | { | |||
7299 | if (b->source_file != NULL((void*)0)) | |||
7300 | xfree (b->source_file); | |||
7301 | if (sals.sals[i].symtab == NULL((void*)0)) | |||
7302 | b->source_file = NULL((void*)0); | |||
7303 | else | |||
7304 | b->source_file = | |||
7305 | savestring (sals.sals[i].symtab->filename, | |||
7306 | strlen (sals.sals[i].symtab->filename)); | |||
7307 | b->line_number = sals.sals[i].line; | |||
7308 | b->loc->requested_address = sals.sals[i].pc; | |||
7309 | b->loc->address | |||
7310 | = adjust_breakpoint_address (b->loc->requested_address, | |||
7311 | b->type); | |||
7312 | ||||
7313 | /* Used to check for duplicates here, but that can | |||
7314 | cause trouble, as it doesn't check for disabled | |||
7315 | breakpoints. */ | |||
7316 | ||||
7317 | mention (b); | |||
7318 | ||||
7319 | /* Might be better to do this just once per breakpoint_re_set, | |||
7320 | rather than once for every breakpoint. */ | |||
7321 | breakpoints_changed (); | |||
7322 | } | |||
7323 | b->loc->section = sals.sals[i].section; | |||
7324 | b->enable_state = save_enable; /* Restore it, this worked. */ | |||
7325 | ||||
7326 | ||||
7327 | /* Now that this is re-enabled, check_duplicates | |||
7328 | can be used. */ | |||
7329 | check_duplicates (b); | |||
7330 | ||||
7331 | } | |||
7332 | xfree (sals.sals); | |||
7333 | break; | |||
7334 | ||||
7335 | case bp_watchpoint: | |||
7336 | case bp_hardware_watchpoint: | |||
7337 | case bp_read_watchpoint: | |||
7338 | case bp_access_watchpoint: | |||
7339 | innermost_block = NULL((void*)0); | |||
7340 | /* The issue arises of what context to evaluate this in. The | |||
7341 | same one as when it was set, but what does that mean when | |||
7342 | symbols have been re-read? We could save the filename and | |||
7343 | functionname, but if the context is more local than that, the | |||
7344 | best we could do would be something like how many levels deep | |||
7345 | and which index at that particular level, but that's going to | |||
7346 | be less stable than filenames or function names. */ | |||
7347 | ||||
7348 | /* So for now, just use a global context. */ | |||
7349 | if (b->exp) | |||
7350 | { | |||
7351 | xfree (b->exp); | |||
7352 | /* Avoid re-freeing b->exp if an error during the call to | |||
7353 | parse_expression. */ | |||
7354 | b->exp = NULL((void*)0); | |||
7355 | } | |||
7356 | b->exp = parse_expression (b->exp_string); | |||
7357 | b->exp_valid_block = innermost_block; | |||
7358 | mark = value_mark (); | |||
7359 | if (b->val) | |||
7360 | { | |||
7361 | value_free (b->val)xfree (b->val); | |||
7362 | /* Avoid re-freeing b->val if an error during the call to | |||
7363 | evaluate_expression. */ | |||
7364 | b->val = NULL((void*)0); | |||
7365 | } | |||
7366 | b->val = evaluate_expression (b->exp); | |||
7367 | release_value (b->val); | |||
7368 | if (VALUE_LAZY (b->val)(b->val)->lazy && breakpoint_enabled (b)) | |||
7369 | value_fetch_lazy (b->val); | |||
7370 | ||||
7371 | if (b->cond_string != NULL((void*)0)) | |||
7372 | { | |||
7373 | s = b->cond_string; | |||
7374 | if (b->cond) | |||
7375 | { | |||
7376 | xfree (b->cond); | |||
7377 | /* Avoid re-freeing b->exp if an error during the call | |||
7378 | to parse_exp_1. */ | |||
7379 | b->cond = NULL((void*)0); | |||
7380 | } | |||
7381 | b->cond = parse_exp_1 (&s, (struct block *) 0, 0); | |||
7382 | } | |||
7383 | if (breakpoint_enabled (b)) | |||
7384 | mention (b); | |||
7385 | value_free_to_mark (mark); | |||
7386 | break; | |||
7387 | case bp_catch_catch: | |||
7388 | case bp_catch_throw: | |||
7389 | break; | |||
7390 | /* We needn't really do anything to reset these, since the mask | |||
7391 | that requests them is unaffected by e.g., new libraries being | |||
7392 | loaded. */ | |||
7393 | case bp_catch_fork: | |||
7394 | case bp_catch_vfork: | |||
7395 | case bp_catch_exec: | |||
7396 | break; | |||
7397 | ||||
7398 | default: | |||
7399 | printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); | |||
7400 | /* fall through */ | |||
7401 | /* Delete longjmp and overlay event breakpoints; they will be | |||
7402 | reset later by breakpoint_re_set. */ | |||
7403 | case bp_longjmp: | |||
7404 | case bp_longjmp_resume: | |||
7405 | case bp_overlay_event: | |||
7406 | delete_breakpoint (b); | |||
7407 | break; | |||
7408 | ||||
7409 | /* This breakpoint is special, it's set up when the inferior | |||
7410 | starts and we really don't want to touch it. */ | |||
7411 | case bp_shlib_event: | |||
7412 | ||||
7413 | /* Like bp_shlib_event, this breakpoint type is special. | |||
7414 | Once it is set up, we do not want to touch it. */ | |||
7415 | case bp_thread_event: | |||
7416 | ||||
7417 | /* Keep temporary breakpoints, which can be encountered when we step | |||
7418 | over a dlopen call and SOLIB_ADD is resetting the breakpoints. | |||
7419 | Otherwise these should have been blown away via the cleanup chain | |||
7420 | or by breakpoint_init_inferior when we rerun the executable. */ | |||
7421 | case bp_until: | |||
7422 | case bp_finish: | |||
7423 | case bp_watchpoint_scope: | |||
7424 | case bp_call_dummy: | |||
7425 | case bp_step_resume: | |||
7426 | break; | |||
7427 | } | |||
7428 | ||||
7429 | return 0; | |||
7430 | } | |||
7431 | ||||
7432 | /* Re-set all breakpoints after symbols have been re-loaded. */ | |||
7433 | void | |||
7434 | breakpoint_re_set (void) | |||
7435 | { | |||
7436 | struct breakpoint *b, *temp; | |||
7437 | enum language save_language; | |||
7438 | int save_input_radix; | |||
7439 | ||||
7440 | save_language = current_language->la_language; | |||
7441 | save_input_radix = input_radix; | |||
7442 | ALL_BREAKPOINTS_SAFE (b, temp)for (b = breakpoint_chain; b ? (temp=b->next, 1): 0; b = temp ) | |||
7443 | { | |||
7444 | /* Format possible error msg */ | |||
7445 | char *message = xstrprintf ("Error in re-setting breakpoint %d:\n", | |||
7446 | b->number); | |||
7447 | struct cleanup *cleanups = make_cleanup (xfree, message); | |||
7448 | catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
7449 | do_cleanups (cleanups); | |||
7450 | } | |||
7451 | set_language (save_language); | |||
7452 | input_radix = save_input_radix; | |||
7453 | ||||
7454 | if (GET_LONGJMP_TARGET_P ()(gdbarch_get_longjmp_target_p (current_gdbarch))) | |||
7455 | { | |||
7456 | create_longjmp_breakpoint ("longjmp"); | |||
7457 | create_longjmp_breakpoint ("_longjmp"); | |||
7458 | create_longjmp_breakpoint ("siglongjmp"); | |||
7459 | create_longjmp_breakpoint ("_siglongjmp"); | |||
7460 | create_longjmp_breakpoint (NULL((void*)0)); | |||
7461 | } | |||
7462 | ||||
7463 | create_overlay_event_breakpoint ("_ovly_debug_event"); | |||
7464 | } | |||
7465 | ||||
7466 | /* Reset the thread number of this breakpoint: | |||
7467 | ||||
7468 | - If the breakpoint is for all threads, leave it as-is. | |||
7469 | - Else, reset it to the current thread for inferior_ptid. */ | |||
7470 | void | |||
7471 | breakpoint_re_set_thread (struct breakpoint *b) | |||
7472 | { | |||
7473 | if (b->thread != -1) | |||
7474 | { | |||
7475 | if (in_thread_list (inferior_ptid)) | |||
7476 | b->thread = pid_to_thread_id (inferior_ptid); | |||
7477 | } | |||
7478 | } | |||
7479 | ||||
7480 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |||
7481 | If from_tty is nonzero, it prints a message to that effect, | |||
7482 | which ends with a period (no newline). */ | |||
7483 | ||||
7484 | void | |||
7485 | set_ignore_count (int bptnum, int count, int from_tty) | |||
7486 | { | |||
7487 | struct breakpoint *b; | |||
7488 | ||||
7489 | if (count < 0) | |||
7490 | count = 0; | |||
7491 | ||||
7492 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
7493 | if (b->number == bptnum) | |||
7494 | { | |||
7495 | b->ignore_count = count; | |||
7496 | if (from_tty) | |||
7497 | { | |||
7498 | if (count == 0) | |||
7499 | printf_filtered ("Will stop next time breakpoint %d is reached.", | |||
7500 | bptnum); | |||
7501 | else if (count == 1) | |||
7502 | printf_filtered ("Will ignore next crossing of breakpoint %d.", | |||
7503 | bptnum); | |||
7504 | else | |||
7505 | printf_filtered ("Will ignore next %d crossings of breakpoint %d.", | |||
7506 | count, bptnum); | |||
7507 | } | |||
7508 | breakpoints_changed (); | |||
7509 | breakpoint_modify_event (b->number); | |||
7510 | return; | |||
7511 | } | |||
7512 | ||||
7513 | error ("No breakpoint number %d.", bptnum); | |||
7514 | } | |||
7515 | ||||
7516 | /* Clear the ignore counts of all breakpoints. */ | |||
7517 | void | |||
7518 | breakpoint_clear_ignore_counts (void) | |||
7519 | { | |||
7520 | struct breakpoint *b; | |||
7521 | ||||
7522 | ALL_BREAKPOINTS (b)for (b = breakpoint_chain; b; b = b->next) | |||
7523 | b->ignore_count = 0; | |||
7524 | } | |||
7525 | ||||
7526 | /* Command to set ignore-count of breakpoint N to COUNT. */ | |||
7527 | ||||
7528 | static void | |||
7529 | ignore_command (char *args, int from_tty) | |||
7530 | { | |||
7531 | char *p = args; | |||
7532 | int num; | |||
7533 | ||||
7534 | if (p == 0) | |||
7535 | error_no_arg ("a breakpoint number"); | |||
7536 | ||||
7537 | num = get_number (&p); | |||
7538 | if (num == 0) | |||
7539 | error ("bad breakpoint number: '%s'", args); | |||
7540 | if (*p == 0) | |||
7541 | error ("Second argument (specified ignore-count) is missing."); | |||
7542 | ||||
7543 | set_ignore_count (num, | |||
7544 | longest_to_int (value_as_long (parse_and_eval (p))), | |||
7545 | from_tty); | |||
7546 | if (from_tty) | |||
7547 | printf_filtered ("\n"); | |||
7548 | } | |||
7549 | ||||
7550 | /* Call FUNCTION on each of the breakpoints | |||
7551 | whose numbers are given in ARGS. */ | |||
7552 | ||||
7553 | static void | |||
7554 | map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *)) | |||
7555 | { | |||
7556 | char *p = args; | |||
7557 | char *p1; | |||
7558 | int num; | |||
7559 | struct breakpoint *b, *tmp; | |||
7560 | int match; | |||
7561 | ||||
7562 | if (p == 0) | |||
7563 | error_no_arg ("one or more breakpoint numbers"); | |||
7564 | ||||
7565 | while (*p) | |||
7566 | { | |||
7567 | match = 0; | |||
7568 | p1 = p; | |||
7569 | ||||
7570 | num = get_number_or_range (&p1); | |||
7571 | if (num == 0) | |||
7572 | { | |||
7573 | warning ("bad breakpoint number at or near '%s'", p); | |||
7574 | } | |||
7575 | else | |||
7576 | { | |||
7577 | ALL_BREAKPOINTS_SAFE (b, tmp)for (b = breakpoint_chain; b ? (tmp=b->next, 1): 0; b = tmp ) | |||
7578 | if (b->number == num) | |||
7579 | { | |||
7580 | struct breakpoint *related_breakpoint = b->related_breakpoint; | |||
7581 | match = 1; | |||
7582 | function (b); | |||
7583 | if (related_breakpoint) | |||
7584 | function (related_breakpoint); | |||
7585 | break; | |||
7586 | } | |||
7587 | if (match == 0) | |||
7588 | printf_unfiltered ("No breakpoint number %d.\n", num); | |||
7589 | } | |||
7590 | p = p1; | |||
7591 | } | |||
7592 | } | |||
7593 | ||||
7594 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. | |||
7595 | If from_tty is nonzero, it prints a message to that effect, | |||
7596 | which ends with a period (no newline). */ | |||
7597 | ||||
7598 | void | |||
7599 | disable_breakpoint (struct breakpoint *bpt) | |||
7600 | { | |||
7601 | /* Never disable a watchpoint scope breakpoint; we want to | |||
7602 | hit them when we leave scope so we can delete both the | |||
7603 | watchpoint and its scope breakpoint at that time. */ | |||
7604 | if (bpt->type == bp_watchpoint_scope) | |||
7605 | return; | |||
7606 | ||||
7607 | /* You can't disable permanent breakpoints. */ | |||
7608 | if (bpt->enable_state == bp_permanent) | |||
7609 | return; | |||
7610 | ||||
7611 | bpt->enable_state = bp_disabled; | |||
7612 | ||||
7613 | check_duplicates (bpt); | |||
7614 | ||||
7615 | if (deprecated_modify_breakpoint_hook) | |||
7616 | deprecated_modify_breakpoint_hook (bpt); | |||
7617 | breakpoint_modify_event (bpt->number); | |||
7618 | } | |||
7619 | ||||
7620 | static void | |||
7621 | disable_command (char *args, int from_tty) | |||
7622 | { | |||
7623 | struct breakpoint *bpt; | |||
7624 | if (args == 0) | |||
7625 | ALL_BREAKPOINTS (bpt)for (bpt = breakpoint_chain; bpt; bpt = bpt->next) | |||
7626 | switch (bpt->type) | |||
7627 | { | |||
7628 | case bp_none: | |||
7629 | warning ("attempted to disable apparently deleted breakpoint #%d?", | |||
7630 | bpt->number); | |||
7631 | continue; | |||
7632 | case bp_breakpoint: | |||
7633 | case bp_catch_load: | |||
7634 | case bp_catch_unload: | |||
7635 | case bp_catch_fork: | |||
7636 | case bp_catch_vfork: | |||
7637 | case bp_catch_exec: | |||
7638 | case bp_catch_catch: | |||
7639 | case bp_catch_throw: | |||
7640 | case bp_hardware_breakpoint: | |||
7641 | case bp_watchpoint: | |||
7642 | case bp_hardware_watchpoint: | |||
7643 | case bp_read_watchpoint: | |||
7644 | case bp_access_watchpoint: | |||
7645 | disable_breakpoint (bpt); | |||
7646 | default: | |||
7647 | continue; | |||
7648 | } | |||
7649 | else | |||
7650 | map_breakpoint_numbers (args, disable_breakpoint); | |||
7651 | } | |||
7652 | ||||
7653 | static void | |||
7654 | do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition) | |||
7655 | { | |||
7656 | int target_resources_ok, other_type_used; | |||
7657 | struct value *mark; | |||
7658 | ||||
7659 | if (bpt->type == bp_hardware_breakpoint) | |||
7660 | { | |||
7661 | int i; | |||
7662 | i = hw_breakpoint_used_count (); | |||
7663 | target_resources_ok = | |||
7664 | TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,(*current_target.to_can_use_hw_breakpoint) (bp_hardware_breakpoint , i + 1, 0); | |||
7665 | i + 1, 0)(*current_target.to_can_use_hw_breakpoint) (bp_hardware_breakpoint , i + 1, 0);; | |||
7666 | if (target_resources_ok == 0) | |||
7667 | error ("No hardware breakpoint support in the target."); | |||
7668 | else if (target_resources_ok < 0) | |||
7669 | error ("Hardware breakpoints used exceeds limit."); | |||
7670 | } | |||
7671 | ||||
7672 | if (bpt->pending) | |||
7673 | { | |||
7674 | if (bpt->enable_state != bp_enabled) | |||
7675 | { | |||
7676 | /* When enabling a pending breakpoint, we need to check if the breakpoint | |||
7677 | is resolvable since shared libraries could have been loaded | |||
7678 | after the breakpoint was disabled. */ | |||
7679 | breakpoints_changed (); | |||
7680 | if (resolve_pending_breakpoint (bpt) == GDB_RC_OK) | |||
7681 | { | |||
7682 | delete_breakpoint (bpt); | |||
7683 | return; | |||
7684 | } | |||
7685 | bpt->enable_state = bp_enabled; | |||
7686 | bpt->disposition = disposition; | |||
7687 | } | |||
7688 | } | |||
7689 | else /* Not a pending breakpoint. */ | |||
7690 | { | |||
7691 | if (bpt->enable_state != bp_permanent) | |||
7692 | bpt->enable_state = bp_enabled; | |||
7693 | bpt->disposition = disposition; | |||
7694 | check_duplicates (bpt); | |||
7695 | breakpoints_changed (); | |||
7696 | ||||
7697 | if (bpt->type == bp_watchpoint || | |||
7698 | bpt->type == bp_hardware_watchpoint || | |||
7699 | bpt->type == bp_read_watchpoint || | |||
7700 | bpt->type == bp_access_watchpoint) | |||
7701 | { | |||
7702 | struct frame_id saved_frame_id; | |||
7703 | ||||
7704 | saved_frame_id = get_frame_id (get_selected_frame ()); | |||
7705 | if (bpt->exp_valid_block != NULL((void*)0)) | |||
7706 | { | |||
7707 | struct frame_info *fr = | |||
7708 | fr = frame_find_by_id (bpt->watchpoint_frame); | |||
7709 | if (fr == NULL((void*)0)) | |||
7710 | { | |||
7711 | printf_filtered ("\ | |||
7712 | Cannot enable watchpoint %d because the block in which its expression\n\ | |||
7713 | is valid is not currently in scope.\n", bpt->number); | |||
7714 | bpt->enable_state = bp_disabled; | |||
7715 | return; | |||
7716 | } | |||
7717 | select_frame (fr); | |||
7718 | } | |||
7719 | ||||
7720 | value_free (bpt->val)xfree (bpt->val); | |||
7721 | mark = value_mark (); | |||
7722 | bpt->val = evaluate_expression (bpt->exp); | |||
7723 | release_value (bpt->val); | |||
7724 | if (VALUE_LAZY (bpt->val)(bpt->val)->lazy) | |||
7725 | value_fetch_lazy (bpt->val); | |||
7726 | ||||
7727 | if (bpt->type == bp_hardware_watchpoint || | |||
7728 | bpt->type == bp_read_watchpoint || | |||
7729 | bpt->type == bp_access_watchpoint) | |||
7730 | { | |||
7731 | int i = hw_watchpoint_used_count (bpt->type, &other_type_used); | |||
7732 | int mem_cnt = can_use_hardware_watchpoint (bpt->val); | |||
7733 | ||||
7734 | /* Hack around 'unused var' error for some targets here */ | |||
7735 | (void) mem_cnt, i; | |||
7736 | target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT ((*current_target.to_can_use_hw_breakpoint) (bpt->type, i + mem_cnt, other_type_used); | |||
7737 | bpt->type, i + mem_cnt, other_type_used)(*current_target.to_can_use_hw_breakpoint) (bpt->type, i + mem_cnt, other_type_used);; | |||
7738 | /* we can consider of type is bp_hardware_watchpoint, convert to | |||
7739 | bp_watchpoint in the following condition */ | |||
7740 | if (target_resources_ok < 0) | |||
7741 | { | |||
7742 | printf_filtered ("\ | |||
7743 | Cannot enable watchpoint %d because target watch resources\n\ | |||
7744 | have been allocated for other watchpoints.\n", bpt->number); | |||
7745 | bpt->enable_state = bp_disabled; | |||
7746 | value_free_to_mark (mark); | |||
7747 | return; | |||
7748 | } | |||
7749 | } | |||
7750 | ||||
7751 | select_frame (frame_find_by_id (saved_frame_id)); | |||
7752 | value_free_to_mark (mark); | |||
7753 | } | |||
7754 | } | |||
7755 | ||||
7756 | if (deprecated_modify_breakpoint_hook) | |||
7757 | deprecated_modify_breakpoint_hook (bpt); | |||
7758 | breakpoint_modify_event (bpt->number); | |||
7759 | } | |||
7760 | ||||
7761 | void | |||
7762 | enable_breakpoint (struct breakpoint *bpt) | |||
7763 | { | |||
7764 | do_enable_breakpoint (bpt, bpt->disposition); | |||
7765 | } | |||
7766 | ||||
7767 | /* The enable command enables the specified breakpoints (or all defined | |||
7768 | breakpoints) so they once again become (or continue to be) effective | |||
7769 | in stopping the inferior. */ | |||
7770 | ||||
7771 | static void | |||
7772 | enable_command (char *args, int from_tty) | |||
7773 | { | |||
7774 | struct breakpoint *bpt; | |||
7775 | if (args == 0) | |||
7776 | ALL_BREAKPOINTS (bpt)for (bpt = breakpoint_chain; bpt; bpt = bpt->next) | |||
7777 | switch (bpt->type) | |||
7778 | { | |||
7779 | case bp_none: | |||
7780 | warning ("attempted to enable apparently deleted breakpoint #%d?", | |||
7781 | bpt->number); | |||
7782 | continue; | |||
7783 | case bp_breakpoint: | |||
7784 | case bp_catch_load: | |||
7785 | case bp_catch_unload: | |||
7786 | case bp_catch_fork: | |||
7787 | case bp_catch_vfork: | |||
7788 | case bp_catch_exec: | |||
7789 | case bp_catch_catch: | |||
7790 | case bp_catch_throw: | |||
7791 | case bp_hardware_breakpoint: | |||
7792 | case bp_watchpoint: | |||
7793 | case bp_hardware_watchpoint: | |||
7794 | case bp_read_watchpoint: | |||
7795 | case bp_access_watchpoint: | |||
7796 | enable_breakpoint (bpt); | |||
7797 | default: | |||
7798 | continue; | |||
7799 | } | |||
7800 | else | |||
7801 | map_breakpoint_numbers (args, enable_breakpoint); | |||
7802 | } | |||
7803 | ||||
7804 | static void | |||
7805 | enable_once_breakpoint (struct breakpoint *bpt) | |||
7806 | { | |||
7807 | do_enable_breakpoint (bpt, disp_disable); | |||
7808 | } | |||
7809 | ||||
7810 | static void | |||
7811 | enable_once_command (char *args, int from_tty) | |||
7812 | { | |||
7813 | map_breakpoint_numbers (args, enable_once_breakpoint); | |||
7814 | } | |||
7815 | ||||
7816 | static void | |||
7817 | enable_delete_breakpoint (struct breakpoint *bpt) | |||
7818 | { | |||
7819 | do_enable_breakpoint (bpt, disp_del); | |||
7820 | } | |||
7821 | ||||
7822 | static void | |||
7823 | enable_delete_command (char *args, int from_tty) | |||
7824 | { | |||
7825 | map_breakpoint_numbers (args, enable_delete_breakpoint); | |||
7826 | } | |||
7827 | ||||
7828 | static void | |||
7829 | set_breakpoint_cmd (char *args, int from_tty) | |||
7830 | { | |||
7831 | } | |||
7832 | ||||
7833 | static void | |||
7834 | show_breakpoint_cmd (char *args, int from_tty) | |||
7835 | { | |||
7836 | } | |||
7837 | ||||
7838 | /* Use default_breakpoint_'s, or nothing if they aren't valid. */ | |||
7839 | ||||
7840 | struct symtabs_and_lines | |||
7841 | decode_line_spec_1 (char *string, int funfirstline) | |||
7842 | { | |||
7843 | struct symtabs_and_lines sals; | |||
7844 | if (string == 0) | |||
7845 | error ("Empty line specification."); | |||
7846 | if (default_breakpoint_valid) | |||
7847 | sals = decode_line_1 (&string, funfirstline, | |||
7848 | default_breakpoint_symtab, | |||
7849 | default_breakpoint_line, | |||
7850 | (char ***) NULL((void*)0), NULL((void*)0)); | |||
7851 | else | |||
7852 | sals = decode_line_1 (&string, funfirstline, | |||
7853 | (struct symtab *) NULL((void*)0), 0, (char ***) NULL((void*)0), NULL((void*)0)); | |||
7854 | if (*string) | |||
7855 | error ("Junk at end of line specification: %s", string); | |||
7856 | return sals; | |||
7857 | } | |||
7858 | ||||
7859 | void | |||
7860 | _initialize_breakpoint (void) | |||
7861 | { | |||
7862 | static struct cmd_list_element *breakpoint_set_cmdlist; | |||
7863 | static struct cmd_list_element *breakpoint_show_cmdlist; | |||
7864 | struct cmd_list_element *c; | |||
7865 | ||||
7866 | #ifdef SOLIB_ADD | |||
7867 | observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib); | |||
7868 | #endif | |||
7869 | ||||
7870 | breakpoint_chain = 0; | |||
7871 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful | |||
7872 | before a breakpoint is set. */ | |||
7873 | breakpoint_count = 0; | |||
7874 | ||||
7875 | add_com ("ignore", class_breakpoint, ignore_command, | |||
7876 | "Set ignore-count of breakpoint number N to COUNT.\n\ | |||
7877 | Usage is `ignore N COUNT'."); | |||
7878 | if (xdb_commands) | |||
7879 | add_com_alias ("bc", "ignore", class_breakpoint, 1); | |||
7880 | ||||
7881 | add_com ("commands", class_breakpoint, commands_command, | |||
7882 | "Set commands to be executed when a breakpoint is hit.\n\ | |||
7883 | Give breakpoint number as argument after \"commands\".\n\ | |||
7884 | With no argument, the targeted breakpoint is the last one set.\n\ | |||
7885 | The commands themselves follow starting on the next line.\n\ | |||
7886 | Type a line containing \"end\" to indicate the end of them.\n\ | |||
7887 | Give \"silent\" as the first line to make the breakpoint silent;\n\ | |||
7888 | then no output is printed when it is hit, except what the commands print."); | |||
7889 | ||||
7890 | add_com ("condition", class_breakpoint, condition_command, | |||
7891 | "Specify breakpoint number N to break only if COND is true.\n\ | |||
7892 | Usage is `condition N COND', where N is an integer and COND is an\n\ | |||
7893 | expression to be evaluated whenever breakpoint N is reached."); | |||
7894 | ||||
7895 | c = add_com ("tbreak", class_breakpoint, tbreak_command, | |||
7896 | "Set a temporary breakpoint. Args like \"break\" command.\n\ | |||
7897 | Like \"break\" except the breakpoint is only temporary,\n\ | |||
7898 | so it will be deleted when hit. Equivalent to \"break\" followed\n\ | |||
7899 | by using \"enable delete\" on the breakpoint number."); | |||
7900 | set_cmd_completer (c, location_completer); | |||
7901 | ||||
7902 | c = add_com ("hbreak", class_breakpoint, hbreak_command, | |||
7903 | "Set a hardware assisted breakpoint. Args like \"break\" command.\n\ | |||
7904 | Like \"break\" except the breakpoint requires hardware support,\n\ | |||
7905 | some target hardware may not have this support."); | |||
7906 | set_cmd_completer (c, location_completer); | |||
7907 | ||||
7908 | c = add_com ("thbreak", class_breakpoint, thbreak_command, | |||
7909 | "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\ | |||
7910 | Like \"hbreak\" except the breakpoint is only temporary,\n\ | |||
7911 | so it will be deleted when hit."); | |||
7912 | set_cmd_completer (c, location_completer); | |||
7913 | ||||
7914 | add_prefix_cmd ("enable", class_breakpoint, enable_command, | |||
7915 | "Enable some breakpoints.\n\ | |||
7916 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |||
7917 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |||
7918 | This is used to cancel the effect of the \"disable\" command.\n\ | |||
7919 | With a subcommand you can enable temporarily.", | |||
7920 | &enablelist, "enable ", 1, &cmdlist); | |||
7921 | if (xdb_commands) | |||
7922 | add_com ("ab", class_breakpoint, enable_command, | |||
7923 | "Enable some breakpoints.\n\ | |||
7924 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |||
7925 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ | |||
7926 | This is used to cancel the effect of the \"disable\" command.\n\ | |||
7927 | With a subcommand you can enable temporarily."); | |||
7928 | ||||
7929 | add_com_alias ("en", "enable", class_breakpoint, 1); | |||
7930 | ||||
7931 | add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, | |||
7932 | "Enable some breakpoints.\n\ | |||
7933 | Give breakpoint numbers (separated by spaces) as arguments.\n\ | |||
7934 | This is used to cancel the effect of the \"disable\" command.\n\ | |||
7935 | May be abbreviated to simply \"enable\".\n", | |||
7936 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); | |||
7937 | ||||
7938 | add_cmd ("once", no_class, enable_once_command, | |||
7939 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |||
7940 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.", | |||
7941 | &enablebreaklist); | |||
7942 | ||||
7943 | add_cmd ("delete", no_class, enable_delete_command, | |||
7944 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |||
7945 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |||
7946 | &enablebreaklist); | |||
7947 | ||||
7948 | add_cmd ("delete", no_class, enable_delete_command, | |||
7949 | "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ | |||
7950 | If a breakpoint is hit while enabled in this fashion, it is deleted.", | |||
7951 | &enablelist); | |||
7952 | ||||
7953 | add_cmd ("once", no_class, enable_once_command, | |||
7954 | "Enable breakpoints for one hit. Give breakpoint numbers.\n\ | |||
7955 | If a breakpoint is hit while enabled in this fashion, it becomes disabled.", | |||
7956 | &enablelist); | |||
7957 | ||||
7958 | add_prefix_cmd ("disable", class_breakpoint, disable_command, | |||
7959 | "Disable some breakpoints.\n\ | |||
7960 | Arguments are breakpoint numbers with spaces in between.\n\ | |||
7961 | To disable all breakpoints, give no argument.\n\ | |||
7962 | A disabled breakpoint is not forgotten, but has no effect until reenabled.", | |||
7963 | &disablelist, "disable ", 1, &cmdlist); | |||
7964 | add_com_alias ("dis", "disable", class_breakpoint, 1); | |||
7965 | add_com_alias ("disa", "disable", class_breakpoint, 1); | |||
7966 | if (xdb_commands) | |||
7967 | add_com ("sb", class_breakpoint, disable_command, | |||
7968 | "Disable some breakpoints.\n\ | |||
7969 | Arguments are breakpoint numbers with spaces in between.\n\ | |||
7970 | To disable all breakpoints, give no argument.\n\ | |||
7971 | A disabled breakpoint is not forgotten, but has no effect until reenabled."); | |||
7972 | ||||
7973 | add_cmd ("breakpoints", class_alias, disable_command, | |||
7974 | "Disable some breakpoints.\n\ | |||
7975 | Arguments are breakpoint numbers with spaces in between.\n\ | |||
7976 | To disable all breakpoints, give no argument.\n\ | |||
7977 | A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ | |||
7978 | This command may be abbreviated \"disable\".", | |||
7979 | &disablelist); | |||
7980 | ||||
7981 | add_prefix_cmd ("delete", class_breakpoint, delete_command, | |||
7982 | "Delete some breakpoints or auto-display expressions.\n\ | |||
7983 | Arguments are breakpoint numbers with spaces in between.\n\ | |||
7984 | To delete all breakpoints, give no argument.\n\ | |||
7985 | \n\ | |||
7986 | Also a prefix command for deletion of other GDB objects.\n\ | |||
7987 | The \"unset\" command is also an alias for \"delete\".", | |||
7988 | &deletelist, "delete ", 1, &cmdlist); | |||
7989 | add_com_alias ("d", "delete", class_breakpoint, 1); | |||
7990 | if (xdb_commands) | |||
7991 | add_com ("db", class_breakpoint, delete_command, | |||
7992 | "Delete some breakpoints.\n\ | |||
7993 | Arguments are breakpoint numbers with spaces in between.\n\ | |||
7994 | To delete all breakpoints, give no argument.\n"); | |||
7995 | ||||
7996 | add_cmd ("breakpoints", class_alias, delete_command, | |||
7997 | "Delete some breakpoints or auto-display expressions.\n\ | |||
7998 | Arguments are breakpoint numbers with spaces in between.\n\ | |||
7999 | To delete all breakpoints, give no argument.\n\ | |||
8000 | This command may be abbreviated \"delete\".", | |||
8001 | &deletelist); | |||
8002 | ||||
8003 | add_com ("clear", class_breakpoint, clear_command, | |||
8004 | concat ("Clear breakpoint at specified line or function.\n\ | |||
8005 | Argument may be line number, function name, or \"*\" and an address.\n\ | |||
8006 | If line number is specified, all breakpoints in that line are cleared.\n\ | |||
8007 | If function is specified, breakpoints at beginning of function are cleared.\n\ | |||
8008 | If an address is specified, breakpoints at that address are cleared.\n\n", | |||
8009 | "With no argument, clears all breakpoints in the line that the selected frame\n\ | |||
8010 | is executing in.\n\ | |||
8011 | \n\ | |||
8012 | See also the \"delete\" command which clears breakpoints by number.", NULL((void*)0))); | |||
8013 | ||||
8014 | c = add_com ("break", class_breakpoint, break_command, | |||
8015 | concat ("Set breakpoint at specified line or function.\n\ | |||
8016 | Argument may be line number, function name, or \"*\" and an address.\n\ | |||
8017 | If line number is specified, break at start of code for that line.\n\ | |||
8018 | If function is specified, break at start of code for that function.\n\ | |||
8019 | If an address is specified, break at that exact address.\n", | |||
8020 | "With no arg, uses current execution address of selected stack frame.\n\ | |||
8021 | This is useful for breaking on return to a stack frame.\n\ | |||
8022 | \n\ | |||
8023 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |||
8024 | \n\ | |||
8025 | Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL((void*)0))); | |||
8026 | set_cmd_completer (c, location_completer); | |||
8027 | ||||
8028 | add_com_alias ("b", "break", class_run, 1); | |||
8029 | add_com_alias ("br", "break", class_run, 1); | |||
8030 | add_com_alias ("bre", "break", class_run, 1); | |||
8031 | add_com_alias ("brea", "break", class_run, 1); | |||
8032 | ||||
8033 | if (xdb_commands) | |||
8034 | { | |||
8035 | add_com_alias ("ba", "break", class_breakpoint, 1); | |||
8036 | add_com_alias ("bu", "ubreak", class_breakpoint, 1); | |||
8037 | } | |||
8038 | ||||
8039 | if (dbx_commands) | |||
8040 | { | |||
8041 | add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command, | |||
8042 | "Break in function/address or break at a line in the current file.", | |||
8043 | &stoplist, "stop ", 1, &cmdlist); | |||
8044 | add_cmd ("in", class_breakpoint, stopin_command, | |||
8045 | "Break in function or address.\n", &stoplist); | |||
8046 | add_cmd ("at", class_breakpoint, stopat_command, | |||
8047 | "Break at a line in the current file.\n", &stoplist); | |||
8048 | add_com ("status", class_info, breakpoints_info, | |||
8049 | concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ | |||
8050 | The \"Type\" column indicates one of:\n\ | |||
8051 | \tbreakpoint - normal breakpoint\n\ | |||
8052 | \twatchpoint - watchpoint\n\ | |||
8053 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |||
8054 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |||
8055 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |||
8056 | address and file/line number respectively.\n\n", | |||
8057 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |||
8058 | are set to the address of the last breakpoint listed.\n\n\ | |||
8059 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |||
8060 | breakpoint set.", NULL((void*)0))); | |||
8061 | } | |||
8062 | ||||
8063 | add_info ("breakpoints", breakpoints_info, | |||
8064 | concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ | |||
8065 | The \"Type\" column indicates one of:\n\ | |||
8066 | \tbreakpoint - normal breakpoint\n\ | |||
8067 | \twatchpoint - watchpoint\n\ | |||
8068 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |||
8069 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |||
8070 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |||
8071 | address and file/line number respectively.\n\n", | |||
8072 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |||
8073 | are set to the address of the last breakpoint listed.\n\n\ | |||
8074 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |||
8075 | breakpoint set.", NULL((void*)0))); | |||
8076 | ||||
8077 | if (xdb_commands) | |||
8078 | add_com ("lb", class_breakpoint, breakpoints_info, | |||
8079 | concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ | |||
8080 | The \"Type\" column indicates one of:\n\ | |||
8081 | \tbreakpoint - normal breakpoint\n\ | |||
8082 | \twatchpoint - watchpoint\n\ | |||
8083 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |||
8084 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |||
8085 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |||
8086 | address and file/line number respectively.\n\n", | |||
8087 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |||
8088 | are set to the address of the last breakpoint listed.\n\n\ | |||
8089 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |||
8090 | breakpoint set.", NULL((void*)0))); | |||
8091 | ||||
8092 | add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, | |||
8093 | concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\ | |||
8094 | The \"Type\" column indicates one of:\n\ | |||
8095 | \tbreakpoint - normal breakpoint\n\ | |||
8096 | \twatchpoint - watchpoint\n\ | |||
8097 | \tlongjmp - internal breakpoint used to step through longjmp()\n\ | |||
8098 | \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ | |||
8099 | \tuntil - internal breakpoint used by the \"until\" command\n\ | |||
8100 | \tfinish - internal breakpoint used by the \"finish\" command\n", | |||
8101 | "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ | |||
8102 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ | |||
8103 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ | |||
8104 | address and file/line number respectively.\n\n", | |||
8105 | "Convenience variable \"$_\" and default examine address for \"x\"\n\ | |||
8106 | are set to the address of the last breakpoint listed.\n\n\ | |||
8107 | Convenience variable \"$bpnum\" contains the number of the last\n\ | |||
8108 | breakpoint set.", NULL((void*)0)), | |||
8109 | &maintenanceinfolist); | |||
8110 | ||||
8111 | add_com ("catch", class_breakpoint, catch_command, | |||
8112 | "Set catchpoints to catch events.\n\ | |||
8113 | Raised signals may be caught:\n\ | |||
8114 | \tcatch signal - all signals\n\ | |||
8115 | \tcatch signal <signame> - a particular signal\n\ | |||
8116 | Raised exceptions may be caught:\n\ | |||
8117 | \tcatch throw - all exceptions, when thrown\n\ | |||
8118 | \tcatch throw <exceptname> - a particular exception, when thrown\n\ | |||
8119 | \tcatch catch - all exceptions, when caught\n\ | |||
8120 | \tcatch catch <exceptname> - a particular exception, when caught\n\ | |||
8121 | Thread or process events may be caught:\n\ | |||
8122 | \tcatch thread_start - any threads, just after creation\n\ | |||
8123 | \tcatch thread_exit - any threads, just before expiration\n\ | |||
8124 | \tcatch thread_join - any threads, just after joins\n\ | |||
8125 | Process events may be caught:\n\ | |||
8126 | \tcatch start - any processes, just after creation\n\ | |||
8127 | \tcatch exit - any processes, just before expiration\n\ | |||
8128 | \tcatch fork - calls to fork()\n\ | |||
8129 | \tcatch vfork - calls to vfork()\n\ | |||
8130 | \tcatch exec - calls to exec()\n\ | |||
8131 | Dynamically-linked library events may be caught:\n\ | |||
8132 | \tcatch load - loads of any library\n\ | |||
8133 | \tcatch load <libname> - loads of a particular library\n\ | |||
8134 | \tcatch unload - unloads of any library\n\ | |||
8135 | \tcatch unload <libname> - unloads of a particular library\n\ | |||
8136 | The act of your program's execution stopping may also be caught:\n\ | |||
8137 | \tcatch stop\n\n\ | |||
8138 | C++ exceptions may be caught:\n\ | |||
8139 | \tcatch throw - all exceptions, when thrown\n\ | |||
8140 | \tcatch catch - all exceptions, when caught\n\ | |||
8141 | \n\ | |||
8142 | Do \"help set follow-fork-mode\" for info on debugging your program\n\ | |||
8143 | after a fork or vfork is caught.\n\n\ | |||
8144 | Do \"help breakpoints\" for info on other commands dealing with breakpoints."); | |||
8145 | ||||
8146 | add_com ("tcatch", class_breakpoint, tcatch_command, | |||
8147 | "Set temporary catchpoints to catch events.\n\ | |||
8148 | Args like \"catch\" command.\n\ | |||
8149 | Like \"catch\" except the catchpoint is only temporary,\n\ | |||
8150 | so it will be deleted when hit. Equivalent to \"catch\" followed\n\ | |||
8151 | by using \"enable delete\" on the catchpoint number."); | |||
8152 | ||||
8153 | c = add_com ("watch", class_breakpoint, watch_command, | |||
8154 | "Set a watchpoint for an expression.\n\ | |||
8155 | A watchpoint stops execution of your program whenever the value of\n\ | |||
8156 | an expression changes."); | |||
8157 | set_cmd_completer (c, location_completer); | |||
8158 | ||||
8159 | c = add_com ("rwatch", class_breakpoint, rwatch_command, | |||
8160 | "Set a read watchpoint for an expression.\n\ | |||
8161 | A watchpoint stops execution of your program whenever the value of\n\ | |||
8162 | an expression is read."); | |||
8163 | set_cmd_completer (c, location_completer); | |||
8164 | ||||
8165 | c = add_com ("awatch", class_breakpoint, awatch_command, | |||
8166 | "Set a watchpoint for an expression.\n\ | |||
8167 | A watchpoint stops execution of your program whenever the value of\n\ | |||
8168 | an expression is either read or written."); | |||
8169 | set_cmd_completer (c, location_completer); | |||
8170 | ||||
8171 | add_info ("watchpoints", breakpoints_info, | |||
8172 | "Synonym for ``info breakpoints''."); | |||
8173 | ||||
8174 | ||||
8175 | c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger, | |||
8176 | (char *) &can_use_hw_watchpoints, | |||
8177 | "Set debugger's willingness to use watchpoint hardware.\n\ | |||
8178 | If zero, gdb will not use hardware for new watchpoints, even if\n\ | |||
8179 | such is available. (However, any hardware watchpoints that were\n\ | |||
8180 | created before setting this to nonzero, will continue to use watchpoint\n\ | |||
8181 | hardware.)", | |||
8182 | &setlist); | |||
8183 | deprecated_add_show_from_set (c, &showlist); | |||
8184 | ||||
8185 | can_use_hw_watchpoints = 1; | |||
8186 | ||||
8187 | add_prefix_cmd ("breakpoint", class_maintenance, set_breakpoint_cmd, "\ | |||
8188 | Breakpoint specific settings\n\ | |||
8189 | Configure various breakpoint-specific variables such as\n\ | |||
8190 | pending breakpoint behavior", | |||
8191 | &breakpoint_set_cmdlist, "set breakpoint ", | |||
8192 | 0/*allow-unknown*/, &setlist); | |||
8193 | add_prefix_cmd ("breakpoint", class_maintenance, show_breakpoint_cmd, "\ | |||
8194 | Breakpoint specific settings\n\ | |||
8195 | Configure various breakpoint-specific variables such as\n\ | |||
8196 | pending breakpoint behavior", | |||
8197 | &breakpoint_show_cmdlist, "show breakpoint ", | |||
8198 | 0/*allow-unknown*/, &showlist); | |||
8199 | ||||
8200 | add_setshow_auto_boolean_cmd ("pending", no_class, &pending_break_support, "\ | |||
8201 | Set debugger's behavior regarding pending breakpoints.", "\ | |||
8202 | Show debugger's behavior regarding pending breakpoints.", "\ | |||
8203 | If on, an unrecognized breakpoint location will cause gdb to create a\n\ | |||
8204 | pending breakpoint. If off, an unrecognized breakpoint location results in\n\ | |||
8205 | an error. If auto, an unrecognized breakpoint location results in a\n\ | |||
8206 | user-query to see if a pending breakpoint should be created.", "\ | |||
8207 | Debugger's behavior regarding pending breakpoints is %s.", | |||
8208 | NULL((void*)0), NULL((void*)0), | |||
8209 | &breakpoint_set_cmdlist, | |||
8210 | &breakpoint_show_cmdlist); | |||
8211 | ||||
8212 | pending_break_support = AUTO_BOOLEAN_AUTO; | |||
8213 | } |