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69d05d38 HZ |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
3 | Copyright (C) 2008, 2009 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdbcmd.h" | |
22 | #include "regcache.h" | |
23 | #include "gdbthread.h" | |
24 | #include "event-top.h" | |
25 | #include "exceptions.h" | |
26 | #include "record.h" | |
27 | ||
28 | #include <signal.h> | |
29 | ||
30 | #define DEFAULT_RECORD_INSN_MAX_NUM 200000 | |
31 | ||
32 | #define RECORD_IS_REPLAY \ | |
33 | (record_list->next || execution_direction == EXEC_REVERSE) | |
34 | ||
fda458ee | 35 | /* These are the core structs of the process record functionality. |
69d05d38 | 36 | |
fda458ee | 37 | A record_entry is a record of the value change of a register |
69d05d38 | 38 | ("record_reg") or a part of memory ("record_mem"). And each |
fda458ee MS |
39 | instruction must have a struct record_entry ("record_end") that |
40 | indicates that this is the last struct record_entry of this | |
41 | instruction. | |
69d05d38 | 42 | |
fda458ee MS |
43 | Each struct record_entry is linked to "record_list" by "prev" and |
44 | "next" pointers. */ | |
69d05d38 HZ |
45 | |
46 | struct record_reg_entry | |
47 | { | |
48 | int num; | |
49 | gdb_byte *val; | |
50 | }; | |
51 | ||
52 | struct record_mem_entry | |
53 | { | |
54 | CORE_ADDR addr; | |
55 | int len; | |
afd0cd3f MS |
56 | /* Set this flag if target memory for this entry |
57 | can no longer be accessed. */ | |
58 | int mem_entry_not_accessible; | |
69d05d38 HZ |
59 | gdb_byte *val; |
60 | }; | |
61 | ||
8b739a96 HZ |
62 | struct record_end_entry |
63 | { | |
64 | enum target_signal sigval; | |
65 | }; | |
66 | ||
69d05d38 HZ |
67 | enum record_type |
68 | { | |
69 | record_end = 0, | |
70 | record_reg, | |
71 | record_mem | |
72 | }; | |
73 | ||
74 | struct record_entry | |
75 | { | |
76 | struct record_entry *prev; | |
77 | struct record_entry *next; | |
78 | enum record_type type; | |
79 | union | |
80 | { | |
81 | /* reg */ | |
82 | struct record_reg_entry reg; | |
83 | /* mem */ | |
84 | struct record_mem_entry mem; | |
8b739a96 HZ |
85 | /* end */ |
86 | struct record_end_entry end; | |
69d05d38 HZ |
87 | } u; |
88 | }; | |
89 | ||
90 | /* This is the debug switch for process record. */ | |
91 | int record_debug = 0; | |
92 | ||
93 | /* These list is for execution log. */ | |
94 | static struct record_entry record_first; | |
95 | static struct record_entry *record_list = &record_first; | |
96 | static struct record_entry *record_arch_list_head = NULL; | |
97 | static struct record_entry *record_arch_list_tail = NULL; | |
98 | ||
99 | /* 1 ask user. 0 auto delete the last struct record_entry. */ | |
100 | static int record_stop_at_limit = 1; | |
101 | static int record_insn_max_num = DEFAULT_RECORD_INSN_MAX_NUM; | |
102 | static int record_insn_num = 0; | |
103 | ||
104 | /* The target_ops of process record. */ | |
105 | static struct target_ops record_ops; | |
106 | ||
107 | /* The beneath function pointers. */ | |
108 | static struct target_ops *record_beneath_to_resume_ops; | |
109 | static void (*record_beneath_to_resume) (struct target_ops *, ptid_t, int, | |
110 | enum target_signal); | |
111 | static struct target_ops *record_beneath_to_wait_ops; | |
112 | static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t, | |
47608cb1 PA |
113 | struct target_waitstatus *, |
114 | int); | |
69d05d38 HZ |
115 | static struct target_ops *record_beneath_to_store_registers_ops; |
116 | static void (*record_beneath_to_store_registers) (struct target_ops *, | |
117 | struct regcache *, | |
118 | int regno); | |
119 | static struct target_ops *record_beneath_to_xfer_partial_ops; | |
120 | static LONGEST (*record_beneath_to_xfer_partial) (struct target_ops *ops, | |
121 | enum target_object object, | |
122 | const char *annex, | |
123 | gdb_byte *readbuf, | |
124 | const gdb_byte *writebuf, | |
125 | ULONGEST offset, | |
126 | LONGEST len); | |
a6d9a66e UW |
127 | static int (*record_beneath_to_insert_breakpoint) (struct gdbarch *, |
128 | struct bp_target_info *); | |
129 | static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *, | |
130 | struct bp_target_info *); | |
69d05d38 HZ |
131 | |
132 | static void | |
133 | record_list_release (struct record_entry *rec) | |
134 | { | |
135 | struct record_entry *tmp; | |
136 | ||
137 | if (!rec) | |
138 | return; | |
139 | ||
140 | while (rec->next) | |
141 | { | |
142 | rec = rec->next; | |
143 | } | |
144 | ||
145 | while (rec->prev) | |
146 | { | |
147 | tmp = rec; | |
148 | rec = rec->prev; | |
149 | if (tmp->type == record_reg) | |
150 | xfree (tmp->u.reg.val); | |
151 | else if (tmp->type == record_mem) | |
152 | xfree (tmp->u.mem.val); | |
153 | xfree (tmp); | |
154 | } | |
155 | ||
156 | if (rec != &record_first) | |
157 | xfree (rec); | |
158 | } | |
159 | ||
160 | static void | |
161 | record_list_release_next (void) | |
162 | { | |
163 | struct record_entry *rec = record_list; | |
164 | struct record_entry *tmp = rec->next; | |
165 | rec->next = NULL; | |
166 | while (tmp) | |
167 | { | |
168 | rec = tmp->next; | |
12b1a979 | 169 | if (tmp->type == record_end) |
69d05d38 HZ |
170 | record_insn_num--; |
171 | else if (tmp->type == record_reg) | |
172 | xfree (tmp->u.reg.val); | |
173 | else if (tmp->type == record_mem) | |
174 | xfree (tmp->u.mem.val); | |
175 | xfree (tmp); | |
176 | tmp = rec; | |
177 | } | |
178 | } | |
179 | ||
180 | static void | |
181 | record_list_release_first (void) | |
182 | { | |
183 | struct record_entry *tmp = NULL; | |
184 | enum record_type type; | |
185 | ||
186 | if (!record_first.next) | |
187 | return; | |
188 | ||
189 | while (1) | |
190 | { | |
191 | type = record_first.next->type; | |
192 | ||
193 | if (type == record_reg) | |
194 | xfree (record_first.next->u.reg.val); | |
195 | else if (type == record_mem) | |
196 | xfree (record_first.next->u.mem.val); | |
197 | tmp = record_first.next; | |
198 | record_first.next = tmp->next; | |
199 | xfree (tmp); | |
200 | ||
201 | if (!record_first.next) | |
202 | { | |
203 | gdb_assert (record_insn_num == 1); | |
204 | break; | |
205 | } | |
206 | ||
207 | record_first.next->prev = &record_first; | |
208 | ||
209 | if (type == record_end) | |
210 | break; | |
211 | } | |
212 | ||
213 | record_insn_num--; | |
214 | } | |
215 | ||
216 | /* Add a struct record_entry to record_arch_list. */ | |
217 | ||
218 | static void | |
219 | record_arch_list_add (struct record_entry *rec) | |
220 | { | |
221 | if (record_debug > 1) | |
222 | fprintf_unfiltered (gdb_stdlog, | |
223 | "Process record: record_arch_list_add %s.\n", | |
224 | host_address_to_string (rec)); | |
225 | ||
226 | if (record_arch_list_tail) | |
227 | { | |
228 | record_arch_list_tail->next = rec; | |
229 | rec->prev = record_arch_list_tail; | |
230 | record_arch_list_tail = rec; | |
231 | } | |
232 | else | |
233 | { | |
234 | record_arch_list_head = rec; | |
235 | record_arch_list_tail = rec; | |
236 | } | |
237 | } | |
238 | ||
239 | /* Record the value of a register NUM to record_arch_list. */ | |
240 | ||
241 | int | |
242 | record_arch_list_add_reg (struct regcache *regcache, int num) | |
243 | { | |
244 | struct record_entry *rec; | |
245 | ||
246 | if (record_debug > 1) | |
247 | fprintf_unfiltered (gdb_stdlog, | |
248 | "Process record: add register num = %d to " | |
249 | "record list.\n", | |
250 | num); | |
251 | ||
252 | rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); | |
253 | rec->u.reg.val = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE); | |
254 | rec->prev = NULL; | |
255 | rec->next = NULL; | |
256 | rec->type = record_reg; | |
257 | rec->u.reg.num = num; | |
258 | ||
259 | regcache_raw_read (regcache, num, rec->u.reg.val); | |
260 | ||
261 | record_arch_list_add (rec); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | /* Record the value of a region of memory whose address is ADDR and | |
267 | length is LEN to record_arch_list. */ | |
268 | ||
269 | int | |
270 | record_arch_list_add_mem (CORE_ADDR addr, int len) | |
271 | { | |
272 | struct record_entry *rec; | |
273 | ||
274 | if (record_debug > 1) | |
275 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 | 276 | "Process record: add mem addr = %s len = %d to " |
69d05d38 | 277 | "record list.\n", |
5af949e3 | 278 | paddress (target_gdbarch, addr), len); |
69d05d38 HZ |
279 | |
280 | if (!addr) | |
281 | return 0; | |
282 | ||
283 | rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); | |
284 | rec->u.mem.val = (gdb_byte *) xmalloc (len); | |
285 | rec->prev = NULL; | |
286 | rec->next = NULL; | |
287 | rec->type = record_mem; | |
288 | rec->u.mem.addr = addr; | |
289 | rec->u.mem.len = len; | |
afd0cd3f | 290 | rec->u.mem.mem_entry_not_accessible = 0; |
69d05d38 HZ |
291 | |
292 | if (target_read_memory (addr, rec->u.mem.val, len)) | |
293 | { | |
294 | if (record_debug) | |
295 | fprintf_unfiltered (gdb_stdlog, | |
296 | "Process record: error reading memory at " | |
5af949e3 UW |
297 | "addr = %s len = %d.\n", |
298 | paddress (target_gdbarch, addr), len); | |
69d05d38 HZ |
299 | xfree (rec->u.mem.val); |
300 | xfree (rec); | |
301 | return -1; | |
302 | } | |
303 | ||
304 | record_arch_list_add (rec); | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | /* Add a record_end type struct record_entry to record_arch_list. */ | |
310 | ||
311 | int | |
312 | record_arch_list_add_end (void) | |
313 | { | |
314 | struct record_entry *rec; | |
315 | ||
316 | if (record_debug > 1) | |
317 | fprintf_unfiltered (gdb_stdlog, | |
318 | "Process record: add end to arch list.\n"); | |
319 | ||
320 | rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); | |
321 | rec->prev = NULL; | |
322 | rec->next = NULL; | |
323 | rec->type = record_end; | |
8b739a96 | 324 | rec->u.end.sigval = TARGET_SIGNAL_0; |
69d05d38 HZ |
325 | |
326 | record_arch_list_add (rec); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | static void | |
332 | record_check_insn_num (int set_terminal) | |
333 | { | |
334 | if (record_insn_max_num) | |
335 | { | |
336 | gdb_assert (record_insn_num <= record_insn_max_num); | |
337 | if (record_insn_num == record_insn_max_num) | |
338 | { | |
339 | /* Ask user what to do. */ | |
340 | if (record_stop_at_limit) | |
341 | { | |
342 | int q; | |
343 | if (set_terminal) | |
344 | target_terminal_ours (); | |
345 | q = yquery (_("Do you want to auto delete previous execution " | |
346 | "log entries when record/replay buffer becomes " | |
347 | "full (record stop-at-limit)?")); | |
348 | if (set_terminal) | |
349 | target_terminal_inferior (); | |
350 | if (q) | |
351 | record_stop_at_limit = 0; | |
352 | else | |
353 | error (_("Process record: inferior program stopped.")); | |
354 | } | |
355 | } | |
356 | } | |
357 | } | |
358 | ||
359 | /* Before inferior step (when GDB record the running message, inferior | |
360 | only can step), GDB will call this function to record the values to | |
361 | record_list. This function will call gdbarch_process_record to | |
362 | record the running message of inferior and set them to | |
363 | record_arch_list, and add it to record_list. */ | |
364 | ||
365 | static void | |
366 | record_message_cleanups (void *ignore) | |
367 | { | |
368 | record_list_release (record_arch_list_tail); | |
369 | } | |
370 | ||
8b739a96 HZ |
371 | struct record_message_args { |
372 | struct regcache *regcache; | |
373 | enum target_signal signal; | |
374 | }; | |
375 | ||
69d05d38 HZ |
376 | static int |
377 | record_message (void *args) | |
378 | { | |
379 | int ret; | |
8b739a96 HZ |
380 | struct record_message_args *myargs = args; |
381 | struct gdbarch *gdbarch = get_regcache_arch (myargs->regcache); | |
69d05d38 HZ |
382 | struct cleanup *old_cleanups = make_cleanup (record_message_cleanups, 0); |
383 | ||
384 | record_arch_list_head = NULL; | |
385 | record_arch_list_tail = NULL; | |
386 | ||
387 | /* Check record_insn_num. */ | |
388 | record_check_insn_num (1); | |
389 | ||
8b739a96 HZ |
390 | /* If gdb sends a signal value to target_resume, |
391 | save it in the 'end' field of the previous instruction. | |
392 | ||
393 | Maybe process record should record what really happened, | |
394 | rather than what gdb pretends has happened. | |
395 | ||
396 | So if Linux delivered the signal to the child process during | |
397 | the record mode, we will record it and deliver it again in | |
398 | the replay mode. | |
399 | ||
400 | If user says "ignore this signal" during the record mode, then | |
401 | it will be ignored again during the replay mode (no matter if | |
402 | the user says something different, like "deliver this signal" | |
403 | during the replay mode). | |
404 | ||
405 | User should understand that nothing he does during the replay | |
406 | mode will change the behavior of the child. If he tries, | |
407 | then that is a user error. | |
408 | ||
409 | But we should still deliver the signal to gdb during the replay, | |
410 | if we delivered it during the recording. Therefore we should | |
411 | record the signal during record_wait, not record_resume. */ | |
412 | if (record_list != &record_first) /* FIXME better way to check */ | |
413 | { | |
414 | gdb_assert (record_list->type == record_end); | |
415 | record_list->u.end.sigval = myargs->signal; | |
416 | } | |
417 | ||
418 | if (myargs->signal == TARGET_SIGNAL_0 | |
419 | || !gdbarch_process_record_signal_p (gdbarch)) | |
420 | ret = gdbarch_process_record (gdbarch, | |
421 | myargs->regcache, | |
422 | regcache_read_pc (myargs->regcache)); | |
423 | else | |
424 | ret = gdbarch_process_record_signal (gdbarch, | |
425 | myargs->regcache, | |
426 | myargs->signal); | |
427 | ||
69d05d38 HZ |
428 | if (ret > 0) |
429 | error (_("Process record: inferior program stopped.")); | |
430 | if (ret < 0) | |
431 | error (_("Process record: failed to record execution log.")); | |
432 | ||
433 | discard_cleanups (old_cleanups); | |
434 | ||
435 | record_list->next = record_arch_list_head; | |
436 | record_arch_list_head->prev = record_list; | |
437 | record_list = record_arch_list_tail; | |
438 | ||
439 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
440 | record_list_release_first (); | |
441 | else | |
442 | record_insn_num++; | |
443 | ||
444 | return 1; | |
445 | } | |
446 | ||
447 | static int | |
8b739a96 HZ |
448 | do_record_message (struct regcache *regcache, |
449 | enum target_signal signal) | |
69d05d38 | 450 | { |
8b739a96 HZ |
451 | struct record_message_args args; |
452 | ||
453 | args.regcache = regcache; | |
454 | args.signal = signal; | |
455 | return catch_errors (record_message, &args, NULL, RETURN_MASK_ALL); | |
69d05d38 HZ |
456 | } |
457 | ||
458 | /* Set to 1 if record_store_registers and record_xfer_partial | |
459 | doesn't need record. */ | |
460 | ||
461 | static int record_gdb_operation_disable = 0; | |
462 | ||
463 | struct cleanup * | |
464 | record_gdb_operation_disable_set (void) | |
465 | { | |
466 | struct cleanup *old_cleanups = NULL; | |
467 | ||
468 | old_cleanups = | |
469 | make_cleanup_restore_integer (&record_gdb_operation_disable); | |
470 | record_gdb_operation_disable = 1; | |
471 | ||
472 | return old_cleanups; | |
473 | } | |
474 | ||
475 | static void | |
476 | record_open (char *name, int from_tty) | |
477 | { | |
478 | struct target_ops *t; | |
479 | ||
480 | if (record_debug) | |
481 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
482 | ||
483 | /* check exec */ | |
484 | if (!target_has_execution) | |
485 | error (_("Process record: the program is not being run.")); | |
486 | if (non_stop) | |
487 | error (_("Process record target can't debug inferior in non-stop mode " | |
488 | "(non-stop).")); | |
489 | if (target_async_permitted) | |
490 | error (_("Process record target can't debug inferior in asynchronous " | |
491 | "mode (target-async).")); | |
492 | ||
a97b0ac8 | 493 | if (!gdbarch_process_record_p (target_gdbarch)) |
69d05d38 HZ |
494 | error (_("Process record: the current architecture doesn't support " |
495 | "record function.")); | |
496 | ||
497 | /* Check if record target is already running. */ | |
498 | if (current_target.to_stratum == record_stratum) | |
5d40bb85 HZ |
499 | error (_("Process record target already running. Use \"record stop\" to " |
500 | "stop record target first.")); | |
69d05d38 HZ |
501 | |
502 | /*Reset the beneath function pointers. */ | |
503 | record_beneath_to_resume = NULL; | |
504 | record_beneath_to_wait = NULL; | |
505 | record_beneath_to_store_registers = NULL; | |
506 | record_beneath_to_xfer_partial = NULL; | |
507 | record_beneath_to_insert_breakpoint = NULL; | |
508 | record_beneath_to_remove_breakpoint = NULL; | |
509 | ||
510 | /* Set the beneath function pointers. */ | |
511 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
512 | { | |
513 | if (!record_beneath_to_resume) | |
514 | { | |
515 | record_beneath_to_resume = t->to_resume; | |
516 | record_beneath_to_resume_ops = t; | |
517 | } | |
518 | if (!record_beneath_to_wait) | |
519 | { | |
520 | record_beneath_to_wait = t->to_wait; | |
521 | record_beneath_to_wait_ops = t; | |
522 | } | |
523 | if (!record_beneath_to_store_registers) | |
524 | { | |
525 | record_beneath_to_store_registers = t->to_store_registers; | |
526 | record_beneath_to_store_registers_ops = t; | |
527 | } | |
528 | if (!record_beneath_to_xfer_partial) | |
529 | { | |
530 | record_beneath_to_xfer_partial = t->to_xfer_partial; | |
531 | record_beneath_to_xfer_partial_ops = t; | |
532 | } | |
533 | if (!record_beneath_to_insert_breakpoint) | |
534 | record_beneath_to_insert_breakpoint = t->to_insert_breakpoint; | |
535 | if (!record_beneath_to_remove_breakpoint) | |
536 | record_beneath_to_remove_breakpoint = t->to_remove_breakpoint; | |
537 | } | |
538 | if (!record_beneath_to_resume) | |
539 | error (_("Process record can't get to_resume.")); | |
540 | if (!record_beneath_to_wait) | |
541 | error (_("Process record can't get to_wait.")); | |
542 | if (!record_beneath_to_store_registers) | |
543 | error (_("Process record can't get to_store_registers.")); | |
544 | if (!record_beneath_to_xfer_partial) | |
545 | error (_("Process record can't get to_xfer_partial.")); | |
546 | if (!record_beneath_to_insert_breakpoint) | |
547 | error (_("Process record can't get to_insert_breakpoint.")); | |
548 | if (!record_beneath_to_remove_breakpoint) | |
549 | error (_("Process record can't get to_remove_breakpoint.")); | |
550 | ||
551 | push_target (&record_ops); | |
552 | ||
553 | /* Reset */ | |
554 | record_insn_num = 0; | |
555 | record_list = &record_first; | |
556 | record_list->next = NULL; | |
557 | } | |
558 | ||
559 | static void | |
560 | record_close (int quitting) | |
561 | { | |
562 | if (record_debug) | |
563 | fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n"); | |
564 | ||
565 | record_list_release (record_list); | |
566 | } | |
567 | ||
568 | static int record_resume_step = 0; | |
69d05d38 HZ |
569 | static int record_resume_error; |
570 | ||
571 | static void | |
572 | record_resume (struct target_ops *ops, ptid_t ptid, int step, | |
8b739a96 | 573 | enum target_signal signal) |
69d05d38 HZ |
574 | { |
575 | record_resume_step = step; | |
69d05d38 HZ |
576 | |
577 | if (!RECORD_IS_REPLAY) | |
578 | { | |
8b739a96 | 579 | if (do_record_message (get_current_regcache (), signal)) |
69d05d38 HZ |
580 | { |
581 | record_resume_error = 0; | |
582 | } | |
583 | else | |
584 | { | |
585 | record_resume_error = 1; | |
586 | return; | |
587 | } | |
588 | record_beneath_to_resume (record_beneath_to_resume_ops, ptid, 1, | |
8b739a96 | 589 | signal); |
69d05d38 HZ |
590 | } |
591 | } | |
592 | ||
593 | static int record_get_sig = 0; | |
594 | ||
595 | static void | |
596 | record_sig_handler (int signo) | |
597 | { | |
598 | if (record_debug) | |
599 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
600 | ||
601 | /* It will break the running inferior in replay mode. */ | |
602 | record_resume_step = 1; | |
603 | ||
604 | /* It will let record_wait set inferior status to get the signal | |
605 | SIGINT. */ | |
606 | record_get_sig = 1; | |
607 | } | |
608 | ||
609 | static void | |
610 | record_wait_cleanups (void *ignore) | |
611 | { | |
612 | if (execution_direction == EXEC_REVERSE) | |
613 | { | |
614 | if (record_list->next) | |
615 | record_list = record_list->next; | |
616 | } | |
617 | else | |
618 | record_list = record_list->prev; | |
619 | } | |
620 | ||
621 | /* In replay mode, this function examines the recorded log and | |
622 | determines where to stop. */ | |
623 | ||
624 | static ptid_t | |
625 | record_wait (struct target_ops *ops, | |
47608cb1 PA |
626 | ptid_t ptid, struct target_waitstatus *status, |
627 | int options) | |
69d05d38 HZ |
628 | { |
629 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
630 | ||
631 | if (record_debug) | |
632 | fprintf_unfiltered (gdb_stdlog, | |
633 | "Process record: record_wait " | |
634 | "record_resume_step = %d\n", | |
635 | record_resume_step); | |
636 | ||
637 | if (!RECORD_IS_REPLAY) | |
638 | { | |
639 | if (record_resume_error) | |
640 | { | |
641 | /* If record_resume get error, return directly. */ | |
642 | status->kind = TARGET_WAITKIND_STOPPED; | |
643 | status->value.sig = TARGET_SIGNAL_ABRT; | |
644 | return inferior_ptid; | |
645 | } | |
646 | ||
647 | if (record_resume_step) | |
648 | { | |
649 | /* This is a single step. */ | |
650 | return record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 651 | ptid, status, options); |
69d05d38 HZ |
652 | } |
653 | else | |
654 | { | |
655 | /* This is not a single step. */ | |
656 | ptid_t ret; | |
657 | CORE_ADDR tmp_pc; | |
658 | ||
659 | while (1) | |
660 | { | |
661 | ret = record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 662 | ptid, status, options); |
69d05d38 | 663 | |
8b739a96 | 664 | /* Is this a SIGTRAP? */ |
69d05d38 HZ |
665 | if (status->kind == TARGET_WAITKIND_STOPPED |
666 | && status->value.sig == TARGET_SIGNAL_TRAP) | |
667 | { | |
8b739a96 | 668 | /* Yes -- check if there is a breakpoint. */ |
69d05d38 | 669 | registers_changed (); |
fb14de7b | 670 | tmp_pc = regcache_read_pc (get_current_regcache ()); |
69d05d38 HZ |
671 | if (breakpoint_inserted_here_p (tmp_pc)) |
672 | { | |
8b739a96 | 673 | /* There is a breakpoint. GDB will want to stop. */ |
69d05d38 HZ |
674 | CORE_ADDR decr_pc_after_break = |
675 | gdbarch_decr_pc_after_break | |
676 | (get_regcache_arch (get_current_regcache ())); | |
677 | if (decr_pc_after_break) | |
678 | { | |
679 | regcache_write_pc (get_thread_regcache (ret), | |
680 | tmp_pc + decr_pc_after_break); | |
681 | } | |
682 | } | |
683 | else | |
684 | { | |
8b739a96 HZ |
685 | /* There is not a breakpoint, and gdb is not |
686 | stepping, therefore gdb will not stop. | |
687 | Therefore we will not return to gdb. | |
688 | Record the insn and resume. */ | |
689 | if (!do_record_message (get_current_regcache (), | |
690 | TARGET_SIGNAL_0)) | |
69d05d38 HZ |
691 | { |
692 | break; | |
693 | } | |
694 | record_beneath_to_resume (record_beneath_to_resume_ops, | |
695 | ptid, 1, | |
88fef440 | 696 | TARGET_SIGNAL_0); |
69d05d38 HZ |
697 | continue; |
698 | } | |
699 | } | |
700 | ||
701 | /* The inferior is broken by a breakpoint or a signal. */ | |
702 | break; | |
703 | } | |
704 | ||
705 | return ret; | |
706 | } | |
707 | } | |
708 | else | |
709 | { | |
710 | struct regcache *regcache = get_current_regcache (); | |
5af949e3 | 711 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
69d05d38 HZ |
712 | int continue_flag = 1; |
713 | int first_record_end = 1; | |
714 | struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0); | |
715 | CORE_ADDR tmp_pc; | |
716 | ||
717 | status->kind = TARGET_WAITKIND_STOPPED; | |
718 | ||
719 | /* Check breakpoint when forward execute. */ | |
720 | if (execution_direction == EXEC_FORWARD) | |
721 | { | |
722 | tmp_pc = regcache_read_pc (regcache); | |
723 | if (breakpoint_inserted_here_p (tmp_pc)) | |
724 | { | |
725 | if (record_debug) | |
726 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 UW |
727 | "Process record: break at %s.\n", |
728 | paddress (gdbarch, tmp_pc)); | |
729 | if (gdbarch_decr_pc_after_break (gdbarch) | |
69d05d38 HZ |
730 | && !record_resume_step) |
731 | regcache_write_pc (regcache, | |
732 | tmp_pc + | |
5af949e3 | 733 | gdbarch_decr_pc_after_break (gdbarch)); |
69d05d38 HZ |
734 | goto replay_out; |
735 | } | |
736 | } | |
737 | ||
738 | record_get_sig = 0; | |
739 | signal (SIGINT, record_sig_handler); | |
740 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
741 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
742 | mode, because inferior will not executed. | |
743 | Then set it to terminal_ours to make GDB get the signal. */ | |
744 | target_terminal_ours (); | |
745 | ||
746 | /* In EXEC_FORWARD mode, record_list points to the tail of prev | |
747 | instruction. */ | |
748 | if (execution_direction == EXEC_FORWARD && record_list->next) | |
749 | record_list = record_list->next; | |
750 | ||
751 | /* Loop over the record_list, looking for the next place to | |
752 | stop. */ | |
753 | do | |
754 | { | |
755 | /* Check for beginning and end of log. */ | |
756 | if (execution_direction == EXEC_REVERSE | |
757 | && record_list == &record_first) | |
758 | { | |
759 | /* Hit beginning of record log in reverse. */ | |
760 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
761 | break; | |
762 | } | |
763 | if (execution_direction != EXEC_REVERSE && !record_list->next) | |
764 | { | |
765 | /* Hit end of record log going forward. */ | |
766 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
767 | break; | |
768 | } | |
769 | ||
770 | /* Set ptid, register and memory according to record_list. */ | |
771 | if (record_list->type == record_reg) | |
772 | { | |
773 | /* reg */ | |
774 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
775 | if (record_debug > 1) | |
776 | fprintf_unfiltered (gdb_stdlog, | |
777 | "Process record: record_reg %s to " | |
778 | "inferior num = %d.\n", | |
779 | host_address_to_string (record_list), | |
780 | record_list->u.reg.num); | |
781 | regcache_cooked_read (regcache, record_list->u.reg.num, reg); | |
782 | regcache_cooked_write (regcache, record_list->u.reg.num, | |
783 | record_list->u.reg.val); | |
784 | memcpy (record_list->u.reg.val, reg, MAX_REGISTER_SIZE); | |
785 | } | |
786 | else if (record_list->type == record_mem) | |
787 | { | |
788 | /* mem */ | |
afd0cd3f MS |
789 | /* Nothing to do if the entry is flagged not_accessible. */ |
790 | if (!record_list->u.mem.mem_entry_not_accessible) | |
791 | { | |
792 | gdb_byte *mem = alloca (record_list->u.mem.len); | |
793 | if (record_debug > 1) | |
794 | fprintf_unfiltered (gdb_stdlog, | |
795 | "Process record: record_mem %s to " | |
796 | "inferior addr = %s len = %d.\n", | |
797 | host_address_to_string (record_list), | |
798 | paddress (gdbarch, | |
799 | record_list->u.mem.addr), | |
800 | record_list->u.mem.len); | |
801 | ||
802 | if (target_read_memory (record_list->u.mem.addr, mem, | |
803 | record_list->u.mem.len)) | |
804 | { | |
805 | if (execution_direction != EXEC_REVERSE) | |
806 | error (_("Process record: error reading memory at " | |
807 | "addr = %s len = %d."), | |
808 | paddress (gdbarch, record_list->u.mem.addr), | |
809 | record_list->u.mem.len); | |
810 | else | |
811 | /* Read failed -- | |
812 | flag entry as not_accessible. */ | |
813 | record_list->u.mem.mem_entry_not_accessible = 1; | |
814 | } | |
815 | else | |
816 | { | |
817 | if (target_write_memory (record_list->u.mem.addr, | |
818 | record_list->u.mem.val, | |
819 | record_list->u.mem.len)) | |
820 | { | |
821 | if (execution_direction != EXEC_REVERSE) | |
822 | error (_("Process record: error writing memory at " | |
823 | "addr = %s len = %d."), | |
824 | paddress (gdbarch, record_list->u.mem.addr), | |
825 | record_list->u.mem.len); | |
826 | else | |
827 | /* Write failed -- | |
828 | flag entry as not_accessible. */ | |
829 | record_list->u.mem.mem_entry_not_accessible = 1; | |
830 | } | |
831 | else | |
832 | { | |
833 | memcpy (record_list->u.mem.val, mem, | |
834 | record_list->u.mem.len); | |
835 | } | |
836 | } | |
837 | } | |
69d05d38 HZ |
838 | } |
839 | else | |
840 | { | |
841 | if (record_debug > 1) | |
842 | fprintf_unfiltered (gdb_stdlog, | |
843 | "Process record: record_end %s to " | |
844 | "inferior.\n", | |
845 | host_address_to_string (record_list)); | |
846 | ||
847 | if (first_record_end && execution_direction == EXEC_REVERSE) | |
848 | { | |
849 | /* When reverse excute, the first record_end is the part of | |
850 | current instruction. */ | |
851 | first_record_end = 0; | |
852 | } | |
853 | else | |
854 | { | |
855 | /* In EXEC_REVERSE mode, this is the record_end of prev | |
856 | instruction. | |
857 | In EXEC_FORWARD mode, this is the record_end of current | |
858 | instruction. */ | |
859 | /* step */ | |
860 | if (record_resume_step) | |
861 | { | |
862 | if (record_debug > 1) | |
863 | fprintf_unfiltered (gdb_stdlog, | |
864 | "Process record: step.\n"); | |
865 | continue_flag = 0; | |
866 | } | |
867 | ||
868 | /* check breakpoint */ | |
869 | tmp_pc = regcache_read_pc (regcache); | |
870 | if (breakpoint_inserted_here_p (tmp_pc)) | |
871 | { | |
872 | if (record_debug) | |
873 | fprintf_unfiltered (gdb_stdlog, | |
874 | "Process record: break " | |
5af949e3 UW |
875 | "at %s.\n", |
876 | paddress (gdbarch, tmp_pc)); | |
877 | if (gdbarch_decr_pc_after_break (gdbarch) | |
69d05d38 HZ |
878 | && execution_direction == EXEC_FORWARD |
879 | && !record_resume_step) | |
880 | regcache_write_pc (regcache, | |
881 | tmp_pc + | |
5af949e3 | 882 | gdbarch_decr_pc_after_break (gdbarch)); |
69d05d38 HZ |
883 | continue_flag = 0; |
884 | } | |
8b739a96 HZ |
885 | /* Check target signal */ |
886 | if (record_list->u.end.sigval != TARGET_SIGNAL_0) | |
887 | /* FIXME: better way to check */ | |
888 | continue_flag = 0; | |
69d05d38 HZ |
889 | } |
890 | } | |
891 | ||
892 | if (continue_flag) | |
893 | { | |
894 | if (execution_direction == EXEC_REVERSE) | |
895 | { | |
896 | if (record_list->prev) | |
897 | record_list = record_list->prev; | |
898 | } | |
899 | else | |
900 | { | |
901 | if (record_list->next) | |
902 | record_list = record_list->next; | |
903 | } | |
904 | } | |
905 | } | |
906 | while (continue_flag); | |
907 | ||
908 | signal (SIGINT, handle_sigint); | |
909 | ||
910 | replay_out: | |
911 | if (record_get_sig) | |
912 | status->value.sig = TARGET_SIGNAL_INT; | |
8b739a96 HZ |
913 | else if (record_list->u.end.sigval != TARGET_SIGNAL_0) |
914 | /* FIXME: better way to check */ | |
915 | status->value.sig = record_list->u.end.sigval; | |
69d05d38 HZ |
916 | else |
917 | status->value.sig = TARGET_SIGNAL_TRAP; | |
918 | ||
919 | discard_cleanups (old_cleanups); | |
920 | } | |
921 | ||
922 | do_cleanups (set_cleanups); | |
923 | return inferior_ptid; | |
924 | } | |
925 | ||
926 | static void | |
927 | record_disconnect (struct target_ops *target, char *args, int from_tty) | |
928 | { | |
929 | if (record_debug) | |
930 | fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n"); | |
931 | ||
932 | unpush_target (&record_ops); | |
933 | target_disconnect (args, from_tty); | |
934 | } | |
935 | ||
936 | static void | |
937 | record_detach (struct target_ops *ops, char *args, int from_tty) | |
938 | { | |
939 | if (record_debug) | |
940 | fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n"); | |
941 | ||
942 | unpush_target (&record_ops); | |
943 | target_detach (args, from_tty); | |
944 | } | |
945 | ||
946 | static void | |
947 | record_mourn_inferior (struct target_ops *ops) | |
948 | { | |
949 | if (record_debug) | |
950 | fprintf_unfiltered (gdb_stdlog, "Process record: " | |
951 | "record_mourn_inferior\n"); | |
952 | ||
953 | unpush_target (&record_ops); | |
954 | target_mourn_inferior (); | |
955 | } | |
956 | ||
957 | /* Close process record target before killing the inferior process. */ | |
958 | ||
959 | static void | |
960 | record_kill (struct target_ops *ops) | |
961 | { | |
962 | if (record_debug) | |
963 | fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n"); | |
964 | ||
965 | unpush_target (&record_ops); | |
966 | target_kill (); | |
967 | } | |
968 | ||
969 | /* Record registers change (by user or by GDB) to list as an instruction. */ | |
970 | ||
971 | static void | |
972 | record_registers_change (struct regcache *regcache, int regnum) | |
973 | { | |
974 | /* Check record_insn_num. */ | |
975 | record_check_insn_num (0); | |
976 | ||
977 | record_arch_list_head = NULL; | |
978 | record_arch_list_tail = NULL; | |
979 | ||
980 | if (regnum < 0) | |
981 | { | |
982 | int i; | |
983 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
984 | { | |
985 | if (record_arch_list_add_reg (regcache, i)) | |
986 | { | |
987 | record_list_release (record_arch_list_tail); | |
988 | error (_("Process record: failed to record execution log.")); | |
989 | } | |
990 | } | |
991 | } | |
992 | else | |
993 | { | |
994 | if (record_arch_list_add_reg (regcache, regnum)) | |
995 | { | |
996 | record_list_release (record_arch_list_tail); | |
997 | error (_("Process record: failed to record execution log.")); | |
998 | } | |
999 | } | |
1000 | if (record_arch_list_add_end ()) | |
1001 | { | |
1002 | record_list_release (record_arch_list_tail); | |
1003 | error (_("Process record: failed to record execution log.")); | |
1004 | } | |
1005 | record_list->next = record_arch_list_head; | |
1006 | record_arch_list_head->prev = record_list; | |
1007 | record_list = record_arch_list_tail; | |
1008 | ||
1009 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1010 | record_list_release_first (); | |
1011 | else | |
1012 | record_insn_num++; | |
1013 | } | |
1014 | ||
1015 | static void | |
1016 | record_store_registers (struct target_ops *ops, struct regcache *regcache, | |
1017 | int regno) | |
1018 | { | |
1019 | if (!record_gdb_operation_disable) | |
1020 | { | |
1021 | if (RECORD_IS_REPLAY) | |
1022 | { | |
1023 | int n; | |
69d05d38 HZ |
1024 | |
1025 | /* Let user choose if he wants to write register or not. */ | |
1026 | if (regno < 0) | |
1027 | n = | |
604ad007 JB |
1028 | query (_("Because GDB is in replay mode, changing the " |
1029 | "value of a register will make the execution " | |
1030 | "log unusable from this point onward. " | |
1031 | "Change all registers?")); | |
69d05d38 HZ |
1032 | else |
1033 | n = | |
604ad007 JB |
1034 | query (_("Because GDB is in replay mode, changing the value " |
1035 | "of a register will make the execution log unusable " | |
1036 | "from this point onward. Change register %s?"), | |
69d05d38 HZ |
1037 | gdbarch_register_name (get_regcache_arch (regcache), |
1038 | regno)); | |
1039 | ||
1040 | if (!n) | |
1041 | { | |
1042 | /* Invalidate the value of regcache that was set in function | |
1043 | "regcache_raw_write". */ | |
1044 | if (regno < 0) | |
1045 | { | |
1046 | int i; | |
1047 | for (i = 0; | |
1048 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1049 | i++) | |
1050 | regcache_invalidate (regcache, i); | |
1051 | } | |
1052 | else | |
1053 | regcache_invalidate (regcache, regno); | |
1054 | ||
1055 | error (_("Process record canceled the operation.")); | |
1056 | } | |
1057 | ||
1058 | /* Destroy the record from here forward. */ | |
1059 | record_list_release_next (); | |
1060 | } | |
1061 | ||
1062 | record_registers_change (regcache, regno); | |
1063 | } | |
1064 | record_beneath_to_store_registers (record_beneath_to_store_registers_ops, | |
1065 | regcache, regno); | |
1066 | } | |
1067 | ||
1068 | /* Behavior is conditional on RECORD_IS_REPLAY. | |
1069 | In replay mode, we cannot write memory unles we are willing to | |
1070 | invalidate the record/replay log from this point forward. */ | |
1071 | ||
1072 | static LONGEST | |
1073 | record_xfer_partial (struct target_ops *ops, enum target_object object, | |
1074 | const char *annex, gdb_byte *readbuf, | |
1075 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
1076 | { | |
1077 | if (!record_gdb_operation_disable | |
1078 | && (object == TARGET_OBJECT_MEMORY | |
1079 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1080 | { | |
1081 | if (RECORD_IS_REPLAY) | |
1082 | { | |
1083 | /* Let user choose if he wants to write memory or not. */ | |
604ad007 JB |
1084 | if (!query (_("Because GDB is in replay mode, writing to memory " |
1085 | "will make the execution log unusable from this " | |
1086 | "point onward. Write memory at address %s?"), | |
5af949e3 | 1087 | paddress (target_gdbarch, offset))) |
9a9dc473 | 1088 | error (_("Process record canceled the operation.")); |
69d05d38 HZ |
1089 | |
1090 | /* Destroy the record from here forward. */ | |
1091 | record_list_release_next (); | |
1092 | } | |
1093 | ||
1094 | /* Check record_insn_num */ | |
1095 | record_check_insn_num (0); | |
1096 | ||
1097 | /* Record registers change to list as an instruction. */ | |
1098 | record_arch_list_head = NULL; | |
1099 | record_arch_list_tail = NULL; | |
1100 | if (record_arch_list_add_mem (offset, len)) | |
1101 | { | |
1102 | record_list_release (record_arch_list_tail); | |
1103 | if (record_debug) | |
1104 | fprintf_unfiltered (gdb_stdlog, | |
1105 | _("Process record: failed to record " | |
1106 | "execution log.")); | |
1107 | return -1; | |
1108 | } | |
1109 | if (record_arch_list_add_end ()) | |
1110 | { | |
1111 | record_list_release (record_arch_list_tail); | |
1112 | if (record_debug) | |
1113 | fprintf_unfiltered (gdb_stdlog, | |
1114 | _("Process record: failed to record " | |
1115 | "execution log.")); | |
1116 | return -1; | |
1117 | } | |
1118 | record_list->next = record_arch_list_head; | |
1119 | record_arch_list_head->prev = record_list; | |
1120 | record_list = record_arch_list_tail; | |
1121 | ||
1122 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1123 | record_list_release_first (); | |
1124 | else | |
1125 | record_insn_num++; | |
1126 | } | |
1127 | ||
1128 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
1129 | object, annex, readbuf, writebuf, | |
1130 | offset, len); | |
1131 | } | |
1132 | ||
1133 | /* Behavior is conditional on RECORD_IS_REPLAY. | |
1134 | We will not actually insert or remove breakpoints when replaying, | |
1135 | nor when recording. */ | |
1136 | ||
1137 | static int | |
a6d9a66e UW |
1138 | record_insert_breakpoint (struct gdbarch *gdbarch, |
1139 | struct bp_target_info *bp_tgt) | |
69d05d38 HZ |
1140 | { |
1141 | if (!RECORD_IS_REPLAY) | |
1142 | { | |
1143 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); | |
a6d9a66e | 1144 | int ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt); |
69d05d38 HZ |
1145 | |
1146 | do_cleanups (old_cleanups); | |
1147 | ||
1148 | return ret; | |
1149 | } | |
1150 | ||
1151 | return 0; | |
1152 | } | |
1153 | ||
1154 | static int | |
a6d9a66e UW |
1155 | record_remove_breakpoint (struct gdbarch *gdbarch, |
1156 | struct bp_target_info *bp_tgt) | |
69d05d38 HZ |
1157 | { |
1158 | if (!RECORD_IS_REPLAY) | |
1159 | { | |
1160 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); | |
a6d9a66e | 1161 | int ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt); |
69d05d38 HZ |
1162 | |
1163 | do_cleanups (old_cleanups); | |
1164 | ||
1165 | return ret; | |
1166 | } | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | static int | |
1172 | record_can_execute_reverse (void) | |
1173 | { | |
1174 | return 1; | |
1175 | } | |
1176 | ||
1177 | static void | |
1178 | init_record_ops (void) | |
1179 | { | |
1180 | record_ops.to_shortname = "record"; | |
1181 | record_ops.to_longname = "Process record and replay target"; | |
1182 | record_ops.to_doc = | |
1183 | "Log program while executing and replay execution from log."; | |
1184 | record_ops.to_open = record_open; | |
1185 | record_ops.to_close = record_close; | |
1186 | record_ops.to_resume = record_resume; | |
1187 | record_ops.to_wait = record_wait; | |
1188 | record_ops.to_disconnect = record_disconnect; | |
1189 | record_ops.to_detach = record_detach; | |
1190 | record_ops.to_mourn_inferior = record_mourn_inferior; | |
1191 | record_ops.to_kill = record_kill; | |
1192 | record_ops.to_create_inferior = find_default_create_inferior; | |
1193 | record_ops.to_store_registers = record_store_registers; | |
1194 | record_ops.to_xfer_partial = record_xfer_partial; | |
1195 | record_ops.to_insert_breakpoint = record_insert_breakpoint; | |
1196 | record_ops.to_remove_breakpoint = record_remove_breakpoint; | |
1197 | record_ops.to_can_execute_reverse = record_can_execute_reverse; | |
1198 | record_ops.to_stratum = record_stratum; | |
1199 | record_ops.to_magic = OPS_MAGIC; | |
1200 | } | |
1201 | ||
1202 | static void | |
1203 | show_record_debug (struct ui_file *file, int from_tty, | |
1204 | struct cmd_list_element *c, const char *value) | |
1205 | { | |
1206 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), | |
1207 | value); | |
1208 | } | |
1209 | ||
1210 | /* Alias for "target record". */ | |
1211 | ||
1212 | static void | |
1213 | cmd_record_start (char *args, int from_tty) | |
1214 | { | |
1215 | execute_command ("target record", from_tty); | |
1216 | } | |
1217 | ||
1218 | /* Truncate the record log from the present point | |
1219 | of replay until the end. */ | |
1220 | ||
1221 | static void | |
1222 | cmd_record_delete (char *args, int from_tty) | |
1223 | { | |
1224 | if (current_target.to_stratum == record_stratum) | |
1225 | { | |
1226 | if (RECORD_IS_REPLAY) | |
1227 | { | |
1228 | if (!from_tty || query (_("Delete the log from this point forward " | |
1229 | "and begin to record the running message " | |
1230 | "at current PC?"))) | |
1231 | record_list_release_next (); | |
1232 | } | |
1233 | else | |
1234 | printf_unfiltered (_("Already at end of record list.\n")); | |
1235 | ||
1236 | } | |
1237 | else | |
1238 | printf_unfiltered (_("Process record is not started.\n")); | |
1239 | } | |
1240 | ||
1241 | /* Implement the "stoprecord" command. */ | |
1242 | ||
1243 | static void | |
1244 | cmd_record_stop (char *args, int from_tty) | |
1245 | { | |
1246 | if (current_target.to_stratum == record_stratum) | |
1247 | { | |
5d40bb85 HZ |
1248 | unpush_target (&record_ops); |
1249 | printf_unfiltered (_("Process record is stoped and all execution " | |
1250 | "log is deleted.\n")); | |
69d05d38 HZ |
1251 | } |
1252 | else | |
1253 | printf_unfiltered (_("Process record is not started.\n")); | |
1254 | } | |
1255 | ||
1256 | /* Set upper limit of record log size. */ | |
1257 | ||
1258 | static void | |
1259 | set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c) | |
1260 | { | |
1261 | if (record_insn_num > record_insn_max_num && record_insn_max_num) | |
1262 | { | |
1263 | printf_unfiltered (_("Record instructions number is bigger than " | |
1264 | "record instructions max number. Auto delete " | |
1265 | "the first ones?\n")); | |
1266 | ||
1267 | while (record_insn_num > record_insn_max_num) | |
1268 | record_list_release_first (); | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | /* Print the current index into the record log (number of insns recorded | |
1273 | so far). */ | |
1274 | ||
1275 | static void | |
1276 | show_record_insn_number (char *ignore, int from_tty) | |
1277 | { | |
1278 | printf_unfiltered (_("Record instruction number is %d.\n"), | |
1279 | record_insn_num); | |
1280 | } | |
1281 | ||
1282 | static struct cmd_list_element *record_cmdlist, *set_record_cmdlist, | |
1283 | *show_record_cmdlist, *info_record_cmdlist; | |
1284 | ||
1285 | static void | |
1286 | set_record_command (char *args, int from_tty) | |
1287 | { | |
1288 | printf_unfiltered (_("\ | |
1289 | \"set record\" must be followed by an apporpriate subcommand.\n")); | |
1290 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); | |
1291 | } | |
1292 | ||
1293 | static void | |
1294 | show_record_command (char *args, int from_tty) | |
1295 | { | |
1296 | cmd_show_list (show_record_cmdlist, from_tty, ""); | |
1297 | } | |
1298 | ||
1299 | static void | |
1300 | info_record_command (char *args, int from_tty) | |
1301 | { | |
1302 | cmd_show_list (info_record_cmdlist, from_tty, ""); | |
1303 | } | |
1304 | ||
1305 | void | |
1306 | _initialize_record (void) | |
1307 | { | |
1308 | /* Init record_first. */ | |
1309 | record_first.prev = NULL; | |
1310 | record_first.next = NULL; | |
1311 | record_first.type = record_end; | |
1312 | ||
1313 | init_record_ops (); | |
1314 | add_target (&record_ops); | |
1315 | ||
1316 | add_setshow_zinteger_cmd ("record", no_class, &record_debug, | |
1317 | _("Set debugging of record/replay feature."), | |
1318 | _("Show debugging of record/replay feature."), | |
1319 | _("When enabled, debugging output for " | |
1320 | "record/replay feature is displayed."), | |
1321 | NULL, show_record_debug, &setdebuglist, | |
1322 | &showdebuglist); | |
1323 | ||
1324 | add_prefix_cmd ("record", class_obscure, cmd_record_start, | |
1325 | _("Abbreviated form of \"target record\" command."), | |
1326 | &record_cmdlist, "record ", 0, &cmdlist); | |
1327 | add_com_alias ("rec", "record", class_obscure, 1); | |
1328 | add_prefix_cmd ("record", class_support, set_record_command, | |
1329 | _("Set record options"), &set_record_cmdlist, | |
1330 | "set record ", 0, &setlist); | |
1331 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); | |
1332 | add_prefix_cmd ("record", class_support, show_record_command, | |
1333 | _("Show record options"), &show_record_cmdlist, | |
1334 | "show record ", 0, &showlist); | |
1335 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); | |
1336 | add_prefix_cmd ("record", class_support, info_record_command, | |
1337 | _("Info record options"), &info_record_cmdlist, | |
1338 | "info record ", 0, &infolist); | |
1339 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); | |
1340 | ||
1341 | ||
1342 | add_cmd ("delete", class_obscure, cmd_record_delete, | |
1343 | _("Delete the rest of execution log and start recording it anew."), | |
1344 | &record_cmdlist); | |
1345 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); | |
1346 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); | |
1347 | ||
1348 | add_cmd ("stop", class_obscure, cmd_record_stop, | |
1349 | _("Stop the record/replay target."), | |
1350 | &record_cmdlist); | |
1351 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); | |
1352 | ||
1353 | /* Record instructions number limit command. */ | |
1354 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
fda458ee | 1355 | &record_stop_at_limit, _("\ |
299a410e EZ |
1356 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
1357 | Show whether record/replay stops when record/replay buffer becomes full."), _("\ | |
1358 | Default is ON.\n\ | |
1359 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
1360 | When OFF, if the record/replay buffer becomes full,\n\ | |
1361 | delete the oldest recorded instruction to make room for each new one."), | |
fda458ee MS |
1362 | NULL, NULL, |
1363 | &set_record_cmdlist, &show_record_cmdlist); | |
69d05d38 HZ |
1364 | add_setshow_zinteger_cmd ("insn-number-max", no_class, |
1365 | &record_insn_max_num, | |
1366 | _("Set record/replay buffer limit."), | |
299a410e EZ |
1367 | _("Show record/replay buffer limit."), _("\ |
1368 | Set the maximum number of instructions to be stored in the\n\ | |
1369 | record/replay buffer. Zero means unlimited. Default is 200000."), | |
69d05d38 HZ |
1370 | set_record_insn_max_num, |
1371 | NULL, &set_record_cmdlist, &show_record_cmdlist); | |
1372 | add_cmd ("insn-number", class_obscure, show_record_insn_number, | |
fda458ee MS |
1373 | _("Show the current number of instructions in the " |
1374 | "record/replay buffer."), &info_record_cmdlist); | |
69d05d38 | 1375 | } |