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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 | 131 | |
61f75dd8 MS |
132 | /* Alloc and free functions for record_reg, record_mem, and record_end |
133 | entries. */ | |
134 | ||
135 | /* Alloc a record_reg record entry. */ | |
136 | ||
137 | static inline struct record_entry * | |
138 | record_reg_alloc (struct regcache *regcache, int regnum) | |
139 | { | |
140 | struct record_entry *rec; | |
141 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
142 | ||
143 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
144 | rec->type = record_reg; | |
145 | rec->u.reg.num = regnum; | |
146 | rec->u.reg.val = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE); | |
147 | ||
148 | return rec; | |
149 | } | |
150 | ||
151 | /* Free a record_reg record entry. */ | |
152 | ||
153 | static inline void | |
154 | record_reg_release (struct record_entry *rec) | |
155 | { | |
156 | gdb_assert (rec->type == record_reg); | |
157 | xfree (rec->u.reg.val); | |
158 | xfree (rec); | |
159 | } | |
160 | ||
161 | /* Alloc a record_mem record entry. */ | |
162 | ||
163 | static inline struct record_entry * | |
164 | record_mem_alloc (CORE_ADDR addr, int len) | |
165 | { | |
166 | struct record_entry *rec; | |
167 | ||
168 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
169 | rec->type = record_mem; | |
170 | rec->u.mem.addr = addr; | |
171 | rec->u.mem.len = len; | |
172 | rec->u.mem.val = (gdb_byte *) xmalloc (len); | |
173 | ||
174 | return rec; | |
175 | } | |
176 | ||
177 | /* Free a record_mem record entry. */ | |
178 | ||
179 | static inline void | |
180 | record_mem_release (struct record_entry *rec) | |
181 | { | |
182 | gdb_assert (rec->type == record_mem); | |
183 | xfree (rec->u.mem.val); | |
184 | xfree (rec); | |
185 | } | |
186 | ||
187 | /* Alloc a record_end record entry. */ | |
188 | ||
189 | static inline struct record_entry * | |
190 | record_end_alloc (void) | |
191 | { | |
192 | struct record_entry *rec; | |
193 | ||
194 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
195 | rec->type = record_end; | |
196 | ||
197 | return rec; | |
198 | } | |
199 | ||
200 | /* Free a record_end record entry. */ | |
201 | ||
202 | static inline void | |
203 | record_end_release (struct record_entry *rec) | |
204 | { | |
205 | xfree (rec); | |
206 | } | |
207 | ||
208 | /* Free one record entry, any type. | |
209 | Return entry->type, in case caller wants to know. */ | |
210 | ||
211 | static inline enum record_type | |
212 | record_entry_release (struct record_entry *rec) | |
213 | { | |
214 | enum record_type type = rec->type; | |
215 | ||
216 | switch (type) { | |
217 | case record_reg: | |
218 | record_reg_release (rec); | |
219 | break; | |
220 | case record_mem: | |
221 | record_mem_release (rec); | |
222 | break; | |
223 | case record_end: | |
224 | record_end_release (rec); | |
225 | break; | |
226 | } | |
227 | return type; | |
228 | } | |
229 | ||
230 | /* Free all record entries in list pointed to by REC. */ | |
231 | ||
69d05d38 HZ |
232 | static void |
233 | record_list_release (struct record_entry *rec) | |
234 | { | |
69d05d38 HZ |
235 | if (!rec) |
236 | return; | |
237 | ||
238 | while (rec->next) | |
61f75dd8 | 239 | rec = rec->next; |
69d05d38 HZ |
240 | |
241 | while (rec->prev) | |
242 | { | |
69d05d38 | 243 | rec = rec->prev; |
61f75dd8 | 244 | record_entry_release (rec->next); |
69d05d38 HZ |
245 | } |
246 | ||
61f75dd8 MS |
247 | if (rec == &record_first) |
248 | { | |
249 | record_insn_num = 0; | |
250 | record_first.next = NULL; | |
251 | } | |
252 | else | |
253 | record_entry_release (rec); | |
69d05d38 HZ |
254 | } |
255 | ||
61f75dd8 MS |
256 | /* Free all record entries forward of the given list position. */ |
257 | ||
69d05d38 | 258 | static void |
61f75dd8 | 259 | record_list_release_following (struct record_entry *rec) |
69d05d38 | 260 | { |
69d05d38 | 261 | struct record_entry *tmp = rec->next; |
61f75dd8 | 262 | |
69d05d38 HZ |
263 | rec->next = NULL; |
264 | while (tmp) | |
265 | { | |
266 | rec = tmp->next; | |
61f75dd8 | 267 | if (record_entry_release (tmp) == record_end) |
69d05d38 | 268 | record_insn_num--; |
69d05d38 HZ |
269 | tmp = rec; |
270 | } | |
271 | } | |
272 | ||
265aad34 MS |
273 | /* Delete the first instruction from the beginning of the log, to make |
274 | room for adding a new instruction at the end of the log. | |
275 | ||
276 | Note -- this function does not modify record_insn_num. */ | |
277 | ||
69d05d38 HZ |
278 | static void |
279 | record_list_release_first (void) | |
280 | { | |
61f75dd8 | 281 | struct record_entry *tmp; |
69d05d38 HZ |
282 | |
283 | if (!record_first.next) | |
284 | return; | |
285 | ||
61f75dd8 | 286 | /* Loop until a record_end. */ |
69d05d38 HZ |
287 | while (1) |
288 | { | |
61f75dd8 | 289 | /* Cut record_first.next out of the linked list. */ |
69d05d38 HZ |
290 | tmp = record_first.next; |
291 | record_first.next = tmp->next; | |
61f75dd8 MS |
292 | tmp->next->prev = &record_first; |
293 | ||
294 | /* tmp is now isolated, and can be deleted. */ | |
295 | if (record_entry_release (tmp) == record_end) | |
296 | { | |
297 | record_insn_num--; | |
298 | break; /* End loop at first record_end. */ | |
299 | } | |
69d05d38 HZ |
300 | |
301 | if (!record_first.next) | |
302 | { | |
303 | gdb_assert (record_insn_num == 1); | |
61f75dd8 | 304 | break; /* End loop when list is empty. */ |
69d05d38 | 305 | } |
69d05d38 | 306 | } |
69d05d38 HZ |
307 | } |
308 | ||
309 | /* Add a struct record_entry to record_arch_list. */ | |
310 | ||
311 | static void | |
312 | record_arch_list_add (struct record_entry *rec) | |
313 | { | |
314 | if (record_debug > 1) | |
315 | fprintf_unfiltered (gdb_stdlog, | |
316 | "Process record: record_arch_list_add %s.\n", | |
317 | host_address_to_string (rec)); | |
318 | ||
319 | if (record_arch_list_tail) | |
320 | { | |
321 | record_arch_list_tail->next = rec; | |
322 | rec->prev = record_arch_list_tail; | |
323 | record_arch_list_tail = rec; | |
324 | } | |
325 | else | |
326 | { | |
327 | record_arch_list_head = rec; | |
328 | record_arch_list_tail = rec; | |
329 | } | |
330 | } | |
331 | ||
61f75dd8 | 332 | /* Record the value of a register REGNUM to record_arch_list. */ |
69d05d38 HZ |
333 | |
334 | int | |
61f75dd8 | 335 | record_arch_list_add_reg (struct regcache *regcache, int regnum) |
69d05d38 HZ |
336 | { |
337 | struct record_entry *rec; | |
338 | ||
339 | if (record_debug > 1) | |
340 | fprintf_unfiltered (gdb_stdlog, | |
341 | "Process record: add register num = %d to " | |
342 | "record list.\n", | |
61f75dd8 | 343 | regnum); |
69d05d38 | 344 | |
61f75dd8 | 345 | rec = record_reg_alloc (regcache, regnum); |
69d05d38 | 346 | |
61f75dd8 | 347 | regcache_raw_read (regcache, regnum, rec->u.reg.val); |
69d05d38 HZ |
348 | |
349 | record_arch_list_add (rec); | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | /* Record the value of a region of memory whose address is ADDR and | |
355 | length is LEN to record_arch_list. */ | |
356 | ||
357 | int | |
358 | record_arch_list_add_mem (CORE_ADDR addr, int len) | |
359 | { | |
360 | struct record_entry *rec; | |
361 | ||
362 | if (record_debug > 1) | |
363 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 | 364 | "Process record: add mem addr = %s len = %d to " |
69d05d38 | 365 | "record list.\n", |
5af949e3 | 366 | paddress (target_gdbarch, addr), len); |
69d05d38 | 367 | |
61f75dd8 | 368 | if (!addr) /* FIXME: Why? Some arch must permit it... */ |
69d05d38 HZ |
369 | return 0; |
370 | ||
61f75dd8 | 371 | rec = record_mem_alloc (addr, len); |
69d05d38 HZ |
372 | |
373 | if (target_read_memory (addr, rec->u.mem.val, len)) | |
374 | { | |
375 | if (record_debug) | |
376 | fprintf_unfiltered (gdb_stdlog, | |
377 | "Process record: error reading memory at " | |
5af949e3 UW |
378 | "addr = %s len = %d.\n", |
379 | paddress (target_gdbarch, addr), len); | |
61f75dd8 | 380 | record_mem_release (rec); |
69d05d38 HZ |
381 | return -1; |
382 | } | |
383 | ||
384 | record_arch_list_add (rec); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | /* Add a record_end type struct record_entry to record_arch_list. */ | |
390 | ||
391 | int | |
392 | record_arch_list_add_end (void) | |
393 | { | |
394 | struct record_entry *rec; | |
395 | ||
396 | if (record_debug > 1) | |
397 | fprintf_unfiltered (gdb_stdlog, | |
398 | "Process record: add end to arch list.\n"); | |
399 | ||
61f75dd8 | 400 | rec = record_end_alloc (); |
8b739a96 | 401 | rec->u.end.sigval = TARGET_SIGNAL_0; |
69d05d38 HZ |
402 | |
403 | record_arch_list_add (rec); | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | static void | |
409 | record_check_insn_num (int set_terminal) | |
410 | { | |
411 | if (record_insn_max_num) | |
412 | { | |
413 | gdb_assert (record_insn_num <= record_insn_max_num); | |
414 | if (record_insn_num == record_insn_max_num) | |
415 | { | |
416 | /* Ask user what to do. */ | |
417 | if (record_stop_at_limit) | |
418 | { | |
419 | int q; | |
420 | if (set_terminal) | |
421 | target_terminal_ours (); | |
422 | q = yquery (_("Do you want to auto delete previous execution " | |
423 | "log entries when record/replay buffer becomes " | |
424 | "full (record stop-at-limit)?")); | |
425 | if (set_terminal) | |
426 | target_terminal_inferior (); | |
427 | if (q) | |
428 | record_stop_at_limit = 0; | |
429 | else | |
430 | error (_("Process record: inferior program stopped.")); | |
431 | } | |
432 | } | |
433 | } | |
434 | } | |
435 | ||
436 | /* Before inferior step (when GDB record the running message, inferior | |
437 | only can step), GDB will call this function to record the values to | |
438 | record_list. This function will call gdbarch_process_record to | |
439 | record the running message of inferior and set them to | |
440 | record_arch_list, and add it to record_list. */ | |
441 | ||
442 | static void | |
443 | record_message_cleanups (void *ignore) | |
444 | { | |
445 | record_list_release (record_arch_list_tail); | |
446 | } | |
447 | ||
8b739a96 HZ |
448 | struct record_message_args { |
449 | struct regcache *regcache; | |
450 | enum target_signal signal; | |
451 | }; | |
452 | ||
69d05d38 HZ |
453 | static int |
454 | record_message (void *args) | |
455 | { | |
456 | int ret; | |
8b739a96 HZ |
457 | struct record_message_args *myargs = args; |
458 | struct gdbarch *gdbarch = get_regcache_arch (myargs->regcache); | |
69d05d38 HZ |
459 | struct cleanup *old_cleanups = make_cleanup (record_message_cleanups, 0); |
460 | ||
461 | record_arch_list_head = NULL; | |
462 | record_arch_list_tail = NULL; | |
463 | ||
464 | /* Check record_insn_num. */ | |
465 | record_check_insn_num (1); | |
466 | ||
8b739a96 HZ |
467 | /* If gdb sends a signal value to target_resume, |
468 | save it in the 'end' field of the previous instruction. | |
469 | ||
470 | Maybe process record should record what really happened, | |
471 | rather than what gdb pretends has happened. | |
472 | ||
473 | So if Linux delivered the signal to the child process during | |
474 | the record mode, we will record it and deliver it again in | |
475 | the replay mode. | |
476 | ||
477 | If user says "ignore this signal" during the record mode, then | |
478 | it will be ignored again during the replay mode (no matter if | |
479 | the user says something different, like "deliver this signal" | |
480 | during the replay mode). | |
481 | ||
482 | User should understand that nothing he does during the replay | |
483 | mode will change the behavior of the child. If he tries, | |
484 | then that is a user error. | |
485 | ||
486 | But we should still deliver the signal to gdb during the replay, | |
487 | if we delivered it during the recording. Therefore we should | |
488 | record the signal during record_wait, not record_resume. */ | |
489 | if (record_list != &record_first) /* FIXME better way to check */ | |
490 | { | |
491 | gdb_assert (record_list->type == record_end); | |
492 | record_list->u.end.sigval = myargs->signal; | |
493 | } | |
494 | ||
495 | if (myargs->signal == TARGET_SIGNAL_0 | |
496 | || !gdbarch_process_record_signal_p (gdbarch)) | |
497 | ret = gdbarch_process_record (gdbarch, | |
498 | myargs->regcache, | |
499 | regcache_read_pc (myargs->regcache)); | |
500 | else | |
501 | ret = gdbarch_process_record_signal (gdbarch, | |
502 | myargs->regcache, | |
503 | myargs->signal); | |
504 | ||
69d05d38 HZ |
505 | if (ret > 0) |
506 | error (_("Process record: inferior program stopped.")); | |
507 | if (ret < 0) | |
508 | error (_("Process record: failed to record execution log.")); | |
509 | ||
510 | discard_cleanups (old_cleanups); | |
511 | ||
512 | record_list->next = record_arch_list_head; | |
513 | record_arch_list_head->prev = record_list; | |
514 | record_list = record_arch_list_tail; | |
515 | ||
516 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
517 | record_list_release_first (); | |
518 | else | |
519 | record_insn_num++; | |
520 | ||
521 | return 1; | |
522 | } | |
523 | ||
524 | static int | |
8b739a96 HZ |
525 | do_record_message (struct regcache *regcache, |
526 | enum target_signal signal) | |
69d05d38 | 527 | { |
8b739a96 HZ |
528 | struct record_message_args args; |
529 | ||
530 | args.regcache = regcache; | |
531 | args.signal = signal; | |
532 | return catch_errors (record_message, &args, NULL, RETURN_MASK_ALL); | |
69d05d38 HZ |
533 | } |
534 | ||
535 | /* Set to 1 if record_store_registers and record_xfer_partial | |
536 | doesn't need record. */ | |
537 | ||
538 | static int record_gdb_operation_disable = 0; | |
539 | ||
540 | struct cleanup * | |
541 | record_gdb_operation_disable_set (void) | |
542 | { | |
543 | struct cleanup *old_cleanups = NULL; | |
544 | ||
545 | old_cleanups = | |
546 | make_cleanup_restore_integer (&record_gdb_operation_disable); | |
547 | record_gdb_operation_disable = 1; | |
548 | ||
549 | return old_cleanups; | |
550 | } | |
551 | ||
552 | static void | |
553 | record_open (char *name, int from_tty) | |
554 | { | |
555 | struct target_ops *t; | |
556 | ||
557 | if (record_debug) | |
558 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
559 | ||
560 | /* check exec */ | |
561 | if (!target_has_execution) | |
562 | error (_("Process record: the program is not being run.")); | |
563 | if (non_stop) | |
564 | error (_("Process record target can't debug inferior in non-stop mode " | |
565 | "(non-stop).")); | |
566 | if (target_async_permitted) | |
567 | error (_("Process record target can't debug inferior in asynchronous " | |
568 | "mode (target-async).")); | |
569 | ||
a97b0ac8 | 570 | if (!gdbarch_process_record_p (target_gdbarch)) |
69d05d38 HZ |
571 | error (_("Process record: the current architecture doesn't support " |
572 | "record function.")); | |
573 | ||
574 | /* Check if record target is already running. */ | |
575 | if (current_target.to_stratum == record_stratum) | |
5d40bb85 HZ |
576 | error (_("Process record target already running. Use \"record stop\" to " |
577 | "stop record target first.")); | |
69d05d38 HZ |
578 | |
579 | /*Reset the beneath function pointers. */ | |
580 | record_beneath_to_resume = NULL; | |
581 | record_beneath_to_wait = NULL; | |
582 | record_beneath_to_store_registers = NULL; | |
583 | record_beneath_to_xfer_partial = NULL; | |
584 | record_beneath_to_insert_breakpoint = NULL; | |
585 | record_beneath_to_remove_breakpoint = NULL; | |
586 | ||
587 | /* Set the beneath function pointers. */ | |
588 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
589 | { | |
590 | if (!record_beneath_to_resume) | |
591 | { | |
592 | record_beneath_to_resume = t->to_resume; | |
593 | record_beneath_to_resume_ops = t; | |
594 | } | |
595 | if (!record_beneath_to_wait) | |
596 | { | |
597 | record_beneath_to_wait = t->to_wait; | |
598 | record_beneath_to_wait_ops = t; | |
599 | } | |
600 | if (!record_beneath_to_store_registers) | |
601 | { | |
602 | record_beneath_to_store_registers = t->to_store_registers; | |
603 | record_beneath_to_store_registers_ops = t; | |
604 | } | |
605 | if (!record_beneath_to_xfer_partial) | |
606 | { | |
607 | record_beneath_to_xfer_partial = t->to_xfer_partial; | |
608 | record_beneath_to_xfer_partial_ops = t; | |
609 | } | |
610 | if (!record_beneath_to_insert_breakpoint) | |
611 | record_beneath_to_insert_breakpoint = t->to_insert_breakpoint; | |
612 | if (!record_beneath_to_remove_breakpoint) | |
613 | record_beneath_to_remove_breakpoint = t->to_remove_breakpoint; | |
614 | } | |
615 | if (!record_beneath_to_resume) | |
616 | error (_("Process record can't get to_resume.")); | |
617 | if (!record_beneath_to_wait) | |
618 | error (_("Process record can't get to_wait.")); | |
619 | if (!record_beneath_to_store_registers) | |
620 | error (_("Process record can't get to_store_registers.")); | |
621 | if (!record_beneath_to_xfer_partial) | |
622 | error (_("Process record can't get to_xfer_partial.")); | |
623 | if (!record_beneath_to_insert_breakpoint) | |
624 | error (_("Process record can't get to_insert_breakpoint.")); | |
625 | if (!record_beneath_to_remove_breakpoint) | |
626 | error (_("Process record can't get to_remove_breakpoint.")); | |
627 | ||
628 | push_target (&record_ops); | |
629 | ||
630 | /* Reset */ | |
631 | record_insn_num = 0; | |
632 | record_list = &record_first; | |
633 | record_list->next = NULL; | |
634 | } | |
635 | ||
636 | static void | |
637 | record_close (int quitting) | |
638 | { | |
639 | if (record_debug) | |
640 | fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n"); | |
641 | ||
642 | record_list_release (record_list); | |
643 | } | |
644 | ||
645 | static int record_resume_step = 0; | |
69d05d38 HZ |
646 | static int record_resume_error; |
647 | ||
648 | static void | |
649 | record_resume (struct target_ops *ops, ptid_t ptid, int step, | |
8b739a96 | 650 | enum target_signal signal) |
69d05d38 HZ |
651 | { |
652 | record_resume_step = step; | |
69d05d38 HZ |
653 | |
654 | if (!RECORD_IS_REPLAY) | |
655 | { | |
8b739a96 | 656 | if (do_record_message (get_current_regcache (), signal)) |
69d05d38 HZ |
657 | { |
658 | record_resume_error = 0; | |
659 | } | |
660 | else | |
661 | { | |
662 | record_resume_error = 1; | |
663 | return; | |
664 | } | |
665 | record_beneath_to_resume (record_beneath_to_resume_ops, ptid, 1, | |
8b739a96 | 666 | signal); |
69d05d38 HZ |
667 | } |
668 | } | |
669 | ||
670 | static int record_get_sig = 0; | |
671 | ||
672 | static void | |
673 | record_sig_handler (int signo) | |
674 | { | |
675 | if (record_debug) | |
676 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
677 | ||
678 | /* It will break the running inferior in replay mode. */ | |
679 | record_resume_step = 1; | |
680 | ||
681 | /* It will let record_wait set inferior status to get the signal | |
682 | SIGINT. */ | |
683 | record_get_sig = 1; | |
684 | } | |
685 | ||
686 | static void | |
687 | record_wait_cleanups (void *ignore) | |
688 | { | |
689 | if (execution_direction == EXEC_REVERSE) | |
690 | { | |
691 | if (record_list->next) | |
692 | record_list = record_list->next; | |
693 | } | |
694 | else | |
695 | record_list = record_list->prev; | |
696 | } | |
697 | ||
698 | /* In replay mode, this function examines the recorded log and | |
699 | determines where to stop. */ | |
700 | ||
701 | static ptid_t | |
702 | record_wait (struct target_ops *ops, | |
47608cb1 PA |
703 | ptid_t ptid, struct target_waitstatus *status, |
704 | int options) | |
69d05d38 HZ |
705 | { |
706 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
707 | ||
708 | if (record_debug) | |
709 | fprintf_unfiltered (gdb_stdlog, | |
710 | "Process record: record_wait " | |
711 | "record_resume_step = %d\n", | |
712 | record_resume_step); | |
713 | ||
714 | if (!RECORD_IS_REPLAY) | |
715 | { | |
716 | if (record_resume_error) | |
717 | { | |
718 | /* If record_resume get error, return directly. */ | |
719 | status->kind = TARGET_WAITKIND_STOPPED; | |
720 | status->value.sig = TARGET_SIGNAL_ABRT; | |
721 | return inferior_ptid; | |
722 | } | |
723 | ||
724 | if (record_resume_step) | |
725 | { | |
726 | /* This is a single step. */ | |
727 | return record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 728 | ptid, status, options); |
69d05d38 HZ |
729 | } |
730 | else | |
731 | { | |
732 | /* This is not a single step. */ | |
733 | ptid_t ret; | |
734 | CORE_ADDR tmp_pc; | |
735 | ||
736 | while (1) | |
737 | { | |
738 | ret = record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 739 | ptid, status, options); |
69d05d38 | 740 | |
8b739a96 | 741 | /* Is this a SIGTRAP? */ |
69d05d38 HZ |
742 | if (status->kind == TARGET_WAITKIND_STOPPED |
743 | && status->value.sig == TARGET_SIGNAL_TRAP) | |
744 | { | |
8b739a96 | 745 | /* Yes -- check if there is a breakpoint. */ |
69d05d38 | 746 | registers_changed (); |
fb14de7b | 747 | tmp_pc = regcache_read_pc (get_current_regcache ()); |
69d05d38 HZ |
748 | if (breakpoint_inserted_here_p (tmp_pc)) |
749 | { | |
8b739a96 | 750 | /* There is a breakpoint. GDB will want to stop. */ |
69d05d38 HZ |
751 | CORE_ADDR decr_pc_after_break = |
752 | gdbarch_decr_pc_after_break | |
753 | (get_regcache_arch (get_current_regcache ())); | |
754 | if (decr_pc_after_break) | |
755 | { | |
756 | regcache_write_pc (get_thread_regcache (ret), | |
757 | tmp_pc + decr_pc_after_break); | |
758 | } | |
759 | } | |
760 | else | |
761 | { | |
8b739a96 HZ |
762 | /* There is not a breakpoint, and gdb is not |
763 | stepping, therefore gdb will not stop. | |
764 | Therefore we will not return to gdb. | |
765 | Record the insn and resume. */ | |
766 | if (!do_record_message (get_current_regcache (), | |
767 | TARGET_SIGNAL_0)) | |
69d05d38 HZ |
768 | { |
769 | break; | |
770 | } | |
771 | record_beneath_to_resume (record_beneath_to_resume_ops, | |
772 | ptid, 1, | |
88fef440 | 773 | TARGET_SIGNAL_0); |
69d05d38 HZ |
774 | continue; |
775 | } | |
776 | } | |
777 | ||
778 | /* The inferior is broken by a breakpoint or a signal. */ | |
779 | break; | |
780 | } | |
781 | ||
782 | return ret; | |
783 | } | |
784 | } | |
785 | else | |
786 | { | |
787 | struct regcache *regcache = get_current_regcache (); | |
5af949e3 | 788 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
69d05d38 HZ |
789 | int continue_flag = 1; |
790 | int first_record_end = 1; | |
791 | struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0); | |
792 | CORE_ADDR tmp_pc; | |
793 | ||
794 | status->kind = TARGET_WAITKIND_STOPPED; | |
795 | ||
796 | /* Check breakpoint when forward execute. */ | |
797 | if (execution_direction == EXEC_FORWARD) | |
798 | { | |
799 | tmp_pc = regcache_read_pc (regcache); | |
800 | if (breakpoint_inserted_here_p (tmp_pc)) | |
801 | { | |
802 | if (record_debug) | |
803 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 UW |
804 | "Process record: break at %s.\n", |
805 | paddress (gdbarch, tmp_pc)); | |
806 | if (gdbarch_decr_pc_after_break (gdbarch) | |
69d05d38 HZ |
807 | && !record_resume_step) |
808 | regcache_write_pc (regcache, | |
809 | tmp_pc + | |
5af949e3 | 810 | gdbarch_decr_pc_after_break (gdbarch)); |
69d05d38 HZ |
811 | goto replay_out; |
812 | } | |
813 | } | |
814 | ||
815 | record_get_sig = 0; | |
816 | signal (SIGINT, record_sig_handler); | |
817 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
818 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
819 | mode, because inferior will not executed. | |
820 | Then set it to terminal_ours to make GDB get the signal. */ | |
821 | target_terminal_ours (); | |
822 | ||
823 | /* In EXEC_FORWARD mode, record_list points to the tail of prev | |
824 | instruction. */ | |
825 | if (execution_direction == EXEC_FORWARD && record_list->next) | |
826 | record_list = record_list->next; | |
827 | ||
828 | /* Loop over the record_list, looking for the next place to | |
829 | stop. */ | |
830 | do | |
831 | { | |
832 | /* Check for beginning and end of log. */ | |
833 | if (execution_direction == EXEC_REVERSE | |
834 | && record_list == &record_first) | |
835 | { | |
836 | /* Hit beginning of record log in reverse. */ | |
837 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
838 | break; | |
839 | } | |
840 | if (execution_direction != EXEC_REVERSE && !record_list->next) | |
841 | { | |
842 | /* Hit end of record log going forward. */ | |
843 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
844 | break; | |
845 | } | |
846 | ||
847 | /* Set ptid, register and memory according to record_list. */ | |
848 | if (record_list->type == record_reg) | |
849 | { | |
850 | /* reg */ | |
851 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
852 | if (record_debug > 1) | |
853 | fprintf_unfiltered (gdb_stdlog, | |
854 | "Process record: record_reg %s to " | |
855 | "inferior num = %d.\n", | |
856 | host_address_to_string (record_list), | |
857 | record_list->u.reg.num); | |
858 | regcache_cooked_read (regcache, record_list->u.reg.num, reg); | |
859 | regcache_cooked_write (regcache, record_list->u.reg.num, | |
860 | record_list->u.reg.val); | |
861 | memcpy (record_list->u.reg.val, reg, MAX_REGISTER_SIZE); | |
862 | } | |
863 | else if (record_list->type == record_mem) | |
864 | { | |
865 | /* mem */ | |
afd0cd3f MS |
866 | /* Nothing to do if the entry is flagged not_accessible. */ |
867 | if (!record_list->u.mem.mem_entry_not_accessible) | |
868 | { | |
869 | gdb_byte *mem = alloca (record_list->u.mem.len); | |
870 | if (record_debug > 1) | |
871 | fprintf_unfiltered (gdb_stdlog, | |
872 | "Process record: record_mem %s to " | |
873 | "inferior addr = %s len = %d.\n", | |
874 | host_address_to_string (record_list), | |
875 | paddress (gdbarch, | |
876 | record_list->u.mem.addr), | |
877 | record_list->u.mem.len); | |
878 | ||
879 | if (target_read_memory (record_list->u.mem.addr, mem, | |
880 | record_list->u.mem.len)) | |
881 | { | |
882 | if (execution_direction != EXEC_REVERSE) | |
883 | error (_("Process record: error reading memory at " | |
884 | "addr = %s len = %d."), | |
885 | paddress (gdbarch, record_list->u.mem.addr), | |
886 | record_list->u.mem.len); | |
887 | else | |
888 | /* Read failed -- | |
889 | flag entry as not_accessible. */ | |
890 | record_list->u.mem.mem_entry_not_accessible = 1; | |
891 | } | |
892 | else | |
893 | { | |
894 | if (target_write_memory (record_list->u.mem.addr, | |
61f75dd8 | 895 | record_list->u.mem.val, |
afd0cd3f MS |
896 | record_list->u.mem.len)) |
897 | { | |
898 | if (execution_direction != EXEC_REVERSE) | |
899 | error (_("Process record: error writing memory at " | |
900 | "addr = %s len = %d."), | |
901 | paddress (gdbarch, record_list->u.mem.addr), | |
902 | record_list->u.mem.len); | |
903 | else | |
904 | /* Write failed -- | |
905 | flag entry as not_accessible. */ | |
906 | record_list->u.mem.mem_entry_not_accessible = 1; | |
907 | } | |
908 | else | |
909 | { | |
910 | memcpy (record_list->u.mem.val, mem, | |
911 | record_list->u.mem.len); | |
912 | } | |
913 | } | |
914 | } | |
69d05d38 HZ |
915 | } |
916 | else | |
917 | { | |
918 | if (record_debug > 1) | |
919 | fprintf_unfiltered (gdb_stdlog, | |
920 | "Process record: record_end %s to " | |
921 | "inferior.\n", | |
922 | host_address_to_string (record_list)); | |
923 | ||
924 | if (first_record_end && execution_direction == EXEC_REVERSE) | |
925 | { | |
926 | /* When reverse excute, the first record_end is the part of | |
927 | current instruction. */ | |
928 | first_record_end = 0; | |
929 | } | |
930 | else | |
931 | { | |
932 | /* In EXEC_REVERSE mode, this is the record_end of prev | |
933 | instruction. | |
934 | In EXEC_FORWARD mode, this is the record_end of current | |
935 | instruction. */ | |
936 | /* step */ | |
937 | if (record_resume_step) | |
938 | { | |
939 | if (record_debug > 1) | |
940 | fprintf_unfiltered (gdb_stdlog, | |
941 | "Process record: step.\n"); | |
942 | continue_flag = 0; | |
943 | } | |
944 | ||
945 | /* check breakpoint */ | |
946 | tmp_pc = regcache_read_pc (regcache); | |
947 | if (breakpoint_inserted_here_p (tmp_pc)) | |
948 | { | |
949 | if (record_debug) | |
950 | fprintf_unfiltered (gdb_stdlog, | |
951 | "Process record: break " | |
5af949e3 UW |
952 | "at %s.\n", |
953 | paddress (gdbarch, tmp_pc)); | |
954 | if (gdbarch_decr_pc_after_break (gdbarch) | |
69d05d38 HZ |
955 | && execution_direction == EXEC_FORWARD |
956 | && !record_resume_step) | |
957 | regcache_write_pc (regcache, | |
958 | tmp_pc + | |
5af949e3 | 959 | gdbarch_decr_pc_after_break (gdbarch)); |
69d05d38 HZ |
960 | continue_flag = 0; |
961 | } | |
8b739a96 HZ |
962 | /* Check target signal */ |
963 | if (record_list->u.end.sigval != TARGET_SIGNAL_0) | |
964 | /* FIXME: better way to check */ | |
965 | continue_flag = 0; | |
69d05d38 HZ |
966 | } |
967 | } | |
968 | ||
969 | if (continue_flag) | |
970 | { | |
971 | if (execution_direction == EXEC_REVERSE) | |
972 | { | |
973 | if (record_list->prev) | |
974 | record_list = record_list->prev; | |
975 | } | |
976 | else | |
977 | { | |
978 | if (record_list->next) | |
979 | record_list = record_list->next; | |
980 | } | |
981 | } | |
982 | } | |
983 | while (continue_flag); | |
984 | ||
985 | signal (SIGINT, handle_sigint); | |
986 | ||
987 | replay_out: | |
988 | if (record_get_sig) | |
989 | status->value.sig = TARGET_SIGNAL_INT; | |
8b739a96 HZ |
990 | else if (record_list->u.end.sigval != TARGET_SIGNAL_0) |
991 | /* FIXME: better way to check */ | |
992 | status->value.sig = record_list->u.end.sigval; | |
69d05d38 HZ |
993 | else |
994 | status->value.sig = TARGET_SIGNAL_TRAP; | |
995 | ||
996 | discard_cleanups (old_cleanups); | |
997 | } | |
998 | ||
999 | do_cleanups (set_cleanups); | |
1000 | return inferior_ptid; | |
1001 | } | |
1002 | ||
1003 | static void | |
1004 | record_disconnect (struct target_ops *target, char *args, int from_tty) | |
1005 | { | |
1006 | if (record_debug) | |
1007 | fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n"); | |
1008 | ||
1009 | unpush_target (&record_ops); | |
1010 | target_disconnect (args, from_tty); | |
1011 | } | |
1012 | ||
1013 | static void | |
1014 | record_detach (struct target_ops *ops, char *args, int from_tty) | |
1015 | { | |
1016 | if (record_debug) | |
1017 | fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n"); | |
1018 | ||
1019 | unpush_target (&record_ops); | |
1020 | target_detach (args, from_tty); | |
1021 | } | |
1022 | ||
1023 | static void | |
1024 | record_mourn_inferior (struct target_ops *ops) | |
1025 | { | |
1026 | if (record_debug) | |
1027 | fprintf_unfiltered (gdb_stdlog, "Process record: " | |
1028 | "record_mourn_inferior\n"); | |
1029 | ||
1030 | unpush_target (&record_ops); | |
1031 | target_mourn_inferior (); | |
1032 | } | |
1033 | ||
1034 | /* Close process record target before killing the inferior process. */ | |
1035 | ||
1036 | static void | |
1037 | record_kill (struct target_ops *ops) | |
1038 | { | |
1039 | if (record_debug) | |
1040 | fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n"); | |
1041 | ||
1042 | unpush_target (&record_ops); | |
1043 | target_kill (); | |
1044 | } | |
1045 | ||
1046 | /* Record registers change (by user or by GDB) to list as an instruction. */ | |
1047 | ||
1048 | static void | |
1049 | record_registers_change (struct regcache *regcache, int regnum) | |
1050 | { | |
1051 | /* Check record_insn_num. */ | |
1052 | record_check_insn_num (0); | |
1053 | ||
1054 | record_arch_list_head = NULL; | |
1055 | record_arch_list_tail = NULL; | |
1056 | ||
1057 | if (regnum < 0) | |
1058 | { | |
1059 | int i; | |
1060 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
1061 | { | |
1062 | if (record_arch_list_add_reg (regcache, i)) | |
1063 | { | |
1064 | record_list_release (record_arch_list_tail); | |
1065 | error (_("Process record: failed to record execution log.")); | |
1066 | } | |
1067 | } | |
1068 | } | |
1069 | else | |
1070 | { | |
1071 | if (record_arch_list_add_reg (regcache, regnum)) | |
1072 | { | |
1073 | record_list_release (record_arch_list_tail); | |
1074 | error (_("Process record: failed to record execution log.")); | |
1075 | } | |
1076 | } | |
1077 | if (record_arch_list_add_end ()) | |
1078 | { | |
1079 | record_list_release (record_arch_list_tail); | |
1080 | error (_("Process record: failed to record execution log.")); | |
1081 | } | |
1082 | record_list->next = record_arch_list_head; | |
1083 | record_arch_list_head->prev = record_list; | |
1084 | record_list = record_arch_list_tail; | |
1085 | ||
1086 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1087 | record_list_release_first (); | |
1088 | else | |
1089 | record_insn_num++; | |
1090 | } | |
1091 | ||
1092 | static void | |
1093 | record_store_registers (struct target_ops *ops, struct regcache *regcache, | |
1094 | int regno) | |
1095 | { | |
1096 | if (!record_gdb_operation_disable) | |
1097 | { | |
1098 | if (RECORD_IS_REPLAY) | |
1099 | { | |
1100 | int n; | |
69d05d38 HZ |
1101 | |
1102 | /* Let user choose if he wants to write register or not. */ | |
1103 | if (regno < 0) | |
1104 | n = | |
604ad007 JB |
1105 | query (_("Because GDB is in replay mode, changing the " |
1106 | "value of a register will make the execution " | |
1107 | "log unusable from this point onward. " | |
1108 | "Change all registers?")); | |
69d05d38 HZ |
1109 | else |
1110 | n = | |
604ad007 JB |
1111 | query (_("Because GDB is in replay mode, changing the value " |
1112 | "of a register will make the execution log unusable " | |
1113 | "from this point onward. Change register %s?"), | |
69d05d38 HZ |
1114 | gdbarch_register_name (get_regcache_arch (regcache), |
1115 | regno)); | |
1116 | ||
1117 | if (!n) | |
1118 | { | |
1119 | /* Invalidate the value of regcache that was set in function | |
1120 | "regcache_raw_write". */ | |
1121 | if (regno < 0) | |
1122 | { | |
1123 | int i; | |
1124 | for (i = 0; | |
1125 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1126 | i++) | |
1127 | regcache_invalidate (regcache, i); | |
1128 | } | |
1129 | else | |
1130 | regcache_invalidate (regcache, regno); | |
1131 | ||
1132 | error (_("Process record canceled the operation.")); | |
1133 | } | |
1134 | ||
1135 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1136 | record_list_release_following (record_list); |
69d05d38 HZ |
1137 | } |
1138 | ||
1139 | record_registers_change (regcache, regno); | |
1140 | } | |
1141 | record_beneath_to_store_registers (record_beneath_to_store_registers_ops, | |
1142 | regcache, regno); | |
1143 | } | |
1144 | ||
1145 | /* Behavior is conditional on RECORD_IS_REPLAY. | |
1146 | In replay mode, we cannot write memory unles we are willing to | |
1147 | invalidate the record/replay log from this point forward. */ | |
1148 | ||
1149 | static LONGEST | |
1150 | record_xfer_partial (struct target_ops *ops, enum target_object object, | |
1151 | const char *annex, gdb_byte *readbuf, | |
1152 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
1153 | { | |
1154 | if (!record_gdb_operation_disable | |
1155 | && (object == TARGET_OBJECT_MEMORY | |
1156 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1157 | { | |
1158 | if (RECORD_IS_REPLAY) | |
1159 | { | |
1160 | /* Let user choose if he wants to write memory or not. */ | |
604ad007 JB |
1161 | if (!query (_("Because GDB is in replay mode, writing to memory " |
1162 | "will make the execution log unusable from this " | |
1163 | "point onward. Write memory at address %s?"), | |
5af949e3 | 1164 | paddress (target_gdbarch, offset))) |
9a9dc473 | 1165 | error (_("Process record canceled the operation.")); |
69d05d38 HZ |
1166 | |
1167 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1168 | record_list_release_following (record_list); |
69d05d38 HZ |
1169 | } |
1170 | ||
1171 | /* Check record_insn_num */ | |
1172 | record_check_insn_num (0); | |
1173 | ||
1174 | /* Record registers change to list as an instruction. */ | |
1175 | record_arch_list_head = NULL; | |
1176 | record_arch_list_tail = NULL; | |
1177 | if (record_arch_list_add_mem (offset, len)) | |
1178 | { | |
1179 | record_list_release (record_arch_list_tail); | |
1180 | if (record_debug) | |
1181 | fprintf_unfiltered (gdb_stdlog, | |
1182 | _("Process record: failed to record " | |
1183 | "execution log.")); | |
1184 | return -1; | |
1185 | } | |
1186 | if (record_arch_list_add_end ()) | |
1187 | { | |
1188 | record_list_release (record_arch_list_tail); | |
1189 | if (record_debug) | |
1190 | fprintf_unfiltered (gdb_stdlog, | |
1191 | _("Process record: failed to record " | |
1192 | "execution log.")); | |
1193 | return -1; | |
1194 | } | |
1195 | record_list->next = record_arch_list_head; | |
1196 | record_arch_list_head->prev = record_list; | |
1197 | record_list = record_arch_list_tail; | |
1198 | ||
1199 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1200 | record_list_release_first (); | |
1201 | else | |
1202 | record_insn_num++; | |
1203 | } | |
1204 | ||
1205 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
1206 | object, annex, readbuf, writebuf, | |
1207 | offset, len); | |
1208 | } | |
1209 | ||
1210 | /* Behavior is conditional on RECORD_IS_REPLAY. | |
1211 | We will not actually insert or remove breakpoints when replaying, | |
1212 | nor when recording. */ | |
1213 | ||
1214 | static int | |
a6d9a66e UW |
1215 | record_insert_breakpoint (struct gdbarch *gdbarch, |
1216 | struct bp_target_info *bp_tgt) | |
69d05d38 HZ |
1217 | { |
1218 | if (!RECORD_IS_REPLAY) | |
1219 | { | |
1220 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); | |
a6d9a66e | 1221 | int ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt); |
69d05d38 HZ |
1222 | |
1223 | do_cleanups (old_cleanups); | |
1224 | ||
1225 | return ret; | |
1226 | } | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | static int | |
a6d9a66e UW |
1232 | record_remove_breakpoint (struct gdbarch *gdbarch, |
1233 | struct bp_target_info *bp_tgt) | |
69d05d38 HZ |
1234 | { |
1235 | if (!RECORD_IS_REPLAY) | |
1236 | { | |
1237 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); | |
a6d9a66e | 1238 | int ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt); |
69d05d38 HZ |
1239 | |
1240 | do_cleanups (old_cleanups); | |
1241 | ||
1242 | return ret; | |
1243 | } | |
1244 | ||
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | static int | |
1249 | record_can_execute_reverse (void) | |
1250 | { | |
1251 | return 1; | |
1252 | } | |
1253 | ||
1254 | static void | |
1255 | init_record_ops (void) | |
1256 | { | |
1257 | record_ops.to_shortname = "record"; | |
1258 | record_ops.to_longname = "Process record and replay target"; | |
1259 | record_ops.to_doc = | |
1260 | "Log program while executing and replay execution from log."; | |
1261 | record_ops.to_open = record_open; | |
1262 | record_ops.to_close = record_close; | |
1263 | record_ops.to_resume = record_resume; | |
1264 | record_ops.to_wait = record_wait; | |
1265 | record_ops.to_disconnect = record_disconnect; | |
1266 | record_ops.to_detach = record_detach; | |
1267 | record_ops.to_mourn_inferior = record_mourn_inferior; | |
1268 | record_ops.to_kill = record_kill; | |
1269 | record_ops.to_create_inferior = find_default_create_inferior; | |
1270 | record_ops.to_store_registers = record_store_registers; | |
1271 | record_ops.to_xfer_partial = record_xfer_partial; | |
1272 | record_ops.to_insert_breakpoint = record_insert_breakpoint; | |
1273 | record_ops.to_remove_breakpoint = record_remove_breakpoint; | |
1274 | record_ops.to_can_execute_reverse = record_can_execute_reverse; | |
1275 | record_ops.to_stratum = record_stratum; | |
1276 | record_ops.to_magic = OPS_MAGIC; | |
1277 | } | |
1278 | ||
1279 | static void | |
1280 | show_record_debug (struct ui_file *file, int from_tty, | |
1281 | struct cmd_list_element *c, const char *value) | |
1282 | { | |
1283 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), | |
1284 | value); | |
1285 | } | |
1286 | ||
1287 | /* Alias for "target record". */ | |
1288 | ||
1289 | static void | |
1290 | cmd_record_start (char *args, int from_tty) | |
1291 | { | |
1292 | execute_command ("target record", from_tty); | |
1293 | } | |
1294 | ||
1295 | /* Truncate the record log from the present point | |
1296 | of replay until the end. */ | |
1297 | ||
1298 | static void | |
1299 | cmd_record_delete (char *args, int from_tty) | |
1300 | { | |
1301 | if (current_target.to_stratum == record_stratum) | |
1302 | { | |
1303 | if (RECORD_IS_REPLAY) | |
1304 | { | |
1305 | if (!from_tty || query (_("Delete the log from this point forward " | |
1306 | "and begin to record the running message " | |
1307 | "at current PC?"))) | |
61f75dd8 | 1308 | record_list_release_following (record_list); |
69d05d38 HZ |
1309 | } |
1310 | else | |
1311 | printf_unfiltered (_("Already at end of record list.\n")); | |
1312 | ||
1313 | } | |
1314 | else | |
1315 | printf_unfiltered (_("Process record is not started.\n")); | |
1316 | } | |
1317 | ||
1318 | /* Implement the "stoprecord" command. */ | |
1319 | ||
1320 | static void | |
1321 | cmd_record_stop (char *args, int from_tty) | |
1322 | { | |
1323 | if (current_target.to_stratum == record_stratum) | |
1324 | { | |
5d40bb85 HZ |
1325 | unpush_target (&record_ops); |
1326 | printf_unfiltered (_("Process record is stoped and all execution " | |
1327 | "log is deleted.\n")); | |
69d05d38 HZ |
1328 | } |
1329 | else | |
1330 | printf_unfiltered (_("Process record is not started.\n")); | |
1331 | } | |
1332 | ||
1333 | /* Set upper limit of record log size. */ | |
1334 | ||
1335 | static void | |
1336 | set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c) | |
1337 | { | |
1338 | if (record_insn_num > record_insn_max_num && record_insn_max_num) | |
1339 | { | |
265aad34 | 1340 | /* Count down record_insn_num while releasing records from list. */ |
69d05d38 | 1341 | while (record_insn_num > record_insn_max_num) |
265aad34 MS |
1342 | { |
1343 | record_list_release_first (); | |
1344 | record_insn_num--; | |
1345 | } | |
69d05d38 HZ |
1346 | } |
1347 | } | |
1348 | ||
1349 | /* Print the current index into the record log (number of insns recorded | |
1350 | so far). */ | |
1351 | ||
1352 | static void | |
1353 | show_record_insn_number (char *ignore, int from_tty) | |
1354 | { | |
1355 | printf_unfiltered (_("Record instruction number is %d.\n"), | |
1356 | record_insn_num); | |
1357 | } | |
1358 | ||
1359 | static struct cmd_list_element *record_cmdlist, *set_record_cmdlist, | |
1360 | *show_record_cmdlist, *info_record_cmdlist; | |
1361 | ||
1362 | static void | |
1363 | set_record_command (char *args, int from_tty) | |
1364 | { | |
1365 | printf_unfiltered (_("\ | |
1366 | \"set record\" must be followed by an apporpriate subcommand.\n")); | |
1367 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); | |
1368 | } | |
1369 | ||
1370 | static void | |
1371 | show_record_command (char *args, int from_tty) | |
1372 | { | |
1373 | cmd_show_list (show_record_cmdlist, from_tty, ""); | |
1374 | } | |
1375 | ||
1376 | static void | |
1377 | info_record_command (char *args, int from_tty) | |
1378 | { | |
1379 | cmd_show_list (info_record_cmdlist, from_tty, ""); | |
1380 | } | |
1381 | ||
1382 | void | |
1383 | _initialize_record (void) | |
1384 | { | |
1385 | /* Init record_first. */ | |
1386 | record_first.prev = NULL; | |
1387 | record_first.next = NULL; | |
1388 | record_first.type = record_end; | |
1389 | ||
1390 | init_record_ops (); | |
1391 | add_target (&record_ops); | |
1392 | ||
1393 | add_setshow_zinteger_cmd ("record", no_class, &record_debug, | |
1394 | _("Set debugging of record/replay feature."), | |
1395 | _("Show debugging of record/replay feature."), | |
1396 | _("When enabled, debugging output for " | |
1397 | "record/replay feature is displayed."), | |
1398 | NULL, show_record_debug, &setdebuglist, | |
1399 | &showdebuglist); | |
1400 | ||
1401 | add_prefix_cmd ("record", class_obscure, cmd_record_start, | |
1402 | _("Abbreviated form of \"target record\" command."), | |
1403 | &record_cmdlist, "record ", 0, &cmdlist); | |
1404 | add_com_alias ("rec", "record", class_obscure, 1); | |
1405 | add_prefix_cmd ("record", class_support, set_record_command, | |
1406 | _("Set record options"), &set_record_cmdlist, | |
1407 | "set record ", 0, &setlist); | |
1408 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); | |
1409 | add_prefix_cmd ("record", class_support, show_record_command, | |
1410 | _("Show record options"), &show_record_cmdlist, | |
1411 | "show record ", 0, &showlist); | |
1412 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); | |
1413 | add_prefix_cmd ("record", class_support, info_record_command, | |
1414 | _("Info record options"), &info_record_cmdlist, | |
1415 | "info record ", 0, &infolist); | |
1416 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); | |
1417 | ||
1418 | ||
1419 | add_cmd ("delete", class_obscure, cmd_record_delete, | |
1420 | _("Delete the rest of execution log and start recording it anew."), | |
1421 | &record_cmdlist); | |
1422 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); | |
1423 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); | |
1424 | ||
1425 | add_cmd ("stop", class_obscure, cmd_record_stop, | |
1426 | _("Stop the record/replay target."), | |
1427 | &record_cmdlist); | |
1428 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); | |
1429 | ||
1430 | /* Record instructions number limit command. */ | |
1431 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
fda458ee | 1432 | &record_stop_at_limit, _("\ |
299a410e EZ |
1433 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
1434 | Show whether record/replay stops when record/replay buffer becomes full."), _("\ | |
1435 | Default is ON.\n\ | |
1436 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
1437 | When OFF, if the record/replay buffer becomes full,\n\ | |
1438 | delete the oldest recorded instruction to make room for each new one."), | |
fda458ee MS |
1439 | NULL, NULL, |
1440 | &set_record_cmdlist, &show_record_cmdlist); | |
69d05d38 HZ |
1441 | add_setshow_zinteger_cmd ("insn-number-max", no_class, |
1442 | &record_insn_max_num, | |
1443 | _("Set record/replay buffer limit."), | |
299a410e EZ |
1444 | _("Show record/replay buffer limit."), _("\ |
1445 | Set the maximum number of instructions to be stored in the\n\ | |
1446 | record/replay buffer. Zero means unlimited. Default is 200000."), | |
69d05d38 HZ |
1447 | set_record_insn_max_num, |
1448 | NULL, &set_record_cmdlist, &show_record_cmdlist); | |
1449 | add_cmd ("insn-number", class_obscure, show_record_insn_number, | |
fda458ee MS |
1450 | _("Show the current number of instructions in the " |
1451 | "record/replay buffer."), &info_record_cmdlist); | |
69d05d38 | 1452 | } |