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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 | 45 | |
69d05d38 HZ |
46 | struct record_mem_entry |
47 | { | |
48 | CORE_ADDR addr; | |
49 | int len; | |
afd0cd3f MS |
50 | /* Set this flag if target memory for this entry |
51 | can no longer be accessed. */ | |
52 | int mem_entry_not_accessible; | |
44389f9b MS |
53 | union |
54 | { | |
55 | gdb_byte *ptr; | |
56 | gdb_byte buf[sizeof (gdb_byte *)]; | |
57 | } u; | |
58 | }; | |
59 | ||
60 | struct record_reg_entry | |
61 | { | |
62 | unsigned short num; | |
63 | unsigned short len; | |
64 | union | |
65 | { | |
66 | gdb_byte *ptr; | |
67 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
68 | } u; | |
69d05d38 HZ |
69 | }; |
70 | ||
8b739a96 HZ |
71 | struct record_end_entry |
72 | { | |
73 | enum target_signal sigval; | |
74 | }; | |
75 | ||
69d05d38 HZ |
76 | enum record_type |
77 | { | |
78 | record_end = 0, | |
79 | record_reg, | |
80 | record_mem | |
81 | }; | |
82 | ||
83 | struct record_entry | |
84 | { | |
85 | struct record_entry *prev; | |
86 | struct record_entry *next; | |
87 | enum record_type type; | |
88 | union | |
89 | { | |
90 | /* reg */ | |
91 | struct record_reg_entry reg; | |
92 | /* mem */ | |
93 | struct record_mem_entry mem; | |
8b739a96 HZ |
94 | /* end */ |
95 | struct record_end_entry end; | |
69d05d38 HZ |
96 | } u; |
97 | }; | |
98 | ||
99 | /* This is the debug switch for process record. */ | |
100 | int record_debug = 0; | |
101 | ||
102 | /* These list is for execution log. */ | |
103 | static struct record_entry record_first; | |
104 | static struct record_entry *record_list = &record_first; | |
105 | static struct record_entry *record_arch_list_head = NULL; | |
106 | static struct record_entry *record_arch_list_tail = NULL; | |
107 | ||
108 | /* 1 ask user. 0 auto delete the last struct record_entry. */ | |
109 | static int record_stop_at_limit = 1; | |
191e1813 | 110 | static unsigned int record_insn_max_num = DEFAULT_RECORD_INSN_MAX_NUM; |
69d05d38 HZ |
111 | static int record_insn_num = 0; |
112 | ||
113 | /* The target_ops of process record. */ | |
114 | static struct target_ops record_ops; | |
115 | ||
116 | /* The beneath function pointers. */ | |
117 | static struct target_ops *record_beneath_to_resume_ops; | |
118 | static void (*record_beneath_to_resume) (struct target_ops *, ptid_t, int, | |
119 | enum target_signal); | |
120 | static struct target_ops *record_beneath_to_wait_ops; | |
121 | static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t, | |
47608cb1 PA |
122 | struct target_waitstatus *, |
123 | int); | |
69d05d38 HZ |
124 | static struct target_ops *record_beneath_to_store_registers_ops; |
125 | static void (*record_beneath_to_store_registers) (struct target_ops *, | |
126 | struct regcache *, | |
127 | int regno); | |
128 | static struct target_ops *record_beneath_to_xfer_partial_ops; | |
129 | static LONGEST (*record_beneath_to_xfer_partial) (struct target_ops *ops, | |
130 | enum target_object object, | |
131 | const char *annex, | |
132 | gdb_byte *readbuf, | |
133 | const gdb_byte *writebuf, | |
134 | ULONGEST offset, | |
135 | LONGEST len); | |
a6d9a66e UW |
136 | static int (*record_beneath_to_insert_breakpoint) (struct gdbarch *, |
137 | struct bp_target_info *); | |
138 | static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *, | |
139 | struct bp_target_info *); | |
69d05d38 | 140 | |
61f75dd8 MS |
141 | /* Alloc and free functions for record_reg, record_mem, and record_end |
142 | entries. */ | |
143 | ||
144 | /* Alloc a record_reg record entry. */ | |
145 | ||
146 | static inline struct record_entry * | |
147 | record_reg_alloc (struct regcache *regcache, int regnum) | |
148 | { | |
149 | struct record_entry *rec; | |
150 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
151 | ||
152 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
153 | rec->type = record_reg; | |
154 | rec->u.reg.num = regnum; | |
44389f9b MS |
155 | rec->u.reg.len = register_size (gdbarch, regnum); |
156 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
157 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
61f75dd8 MS |
158 | |
159 | return rec; | |
160 | } | |
161 | ||
162 | /* Free a record_reg record entry. */ | |
163 | ||
164 | static inline void | |
165 | record_reg_release (struct record_entry *rec) | |
166 | { | |
167 | gdb_assert (rec->type == record_reg); | |
44389f9b MS |
168 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
169 | xfree (rec->u.reg.u.ptr); | |
61f75dd8 MS |
170 | xfree (rec); |
171 | } | |
172 | ||
173 | /* Alloc a record_mem record entry. */ | |
174 | ||
175 | static inline struct record_entry * | |
176 | record_mem_alloc (CORE_ADDR addr, int len) | |
177 | { | |
178 | struct record_entry *rec; | |
179 | ||
180 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
181 | rec->type = record_mem; | |
182 | rec->u.mem.addr = addr; | |
183 | rec->u.mem.len = len; | |
44389f9b MS |
184 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
185 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
61f75dd8 MS |
186 | |
187 | return rec; | |
188 | } | |
189 | ||
190 | /* Free a record_mem record entry. */ | |
191 | ||
192 | static inline void | |
193 | record_mem_release (struct record_entry *rec) | |
194 | { | |
195 | gdb_assert (rec->type == record_mem); | |
44389f9b MS |
196 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
197 | xfree (rec->u.mem.u.ptr); | |
61f75dd8 MS |
198 | xfree (rec); |
199 | } | |
200 | ||
201 | /* Alloc a record_end record entry. */ | |
202 | ||
203 | static inline struct record_entry * | |
204 | record_end_alloc (void) | |
205 | { | |
206 | struct record_entry *rec; | |
207 | ||
208 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
209 | rec->type = record_end; | |
210 | ||
211 | return rec; | |
212 | } | |
213 | ||
214 | /* Free a record_end record entry. */ | |
215 | ||
216 | static inline void | |
217 | record_end_release (struct record_entry *rec) | |
218 | { | |
219 | xfree (rec); | |
220 | } | |
221 | ||
222 | /* Free one record entry, any type. | |
223 | Return entry->type, in case caller wants to know. */ | |
224 | ||
225 | static inline enum record_type | |
226 | record_entry_release (struct record_entry *rec) | |
227 | { | |
228 | enum record_type type = rec->type; | |
229 | ||
230 | switch (type) { | |
231 | case record_reg: | |
232 | record_reg_release (rec); | |
233 | break; | |
234 | case record_mem: | |
235 | record_mem_release (rec); | |
236 | break; | |
237 | case record_end: | |
238 | record_end_release (rec); | |
239 | break; | |
240 | } | |
241 | return type; | |
242 | } | |
243 | ||
244 | /* Free all record entries in list pointed to by REC. */ | |
245 | ||
69d05d38 HZ |
246 | static void |
247 | record_list_release (struct record_entry *rec) | |
248 | { | |
69d05d38 HZ |
249 | if (!rec) |
250 | return; | |
251 | ||
252 | while (rec->next) | |
61f75dd8 | 253 | rec = rec->next; |
69d05d38 HZ |
254 | |
255 | while (rec->prev) | |
256 | { | |
69d05d38 | 257 | rec = rec->prev; |
61f75dd8 | 258 | record_entry_release (rec->next); |
69d05d38 HZ |
259 | } |
260 | ||
61f75dd8 MS |
261 | if (rec == &record_first) |
262 | { | |
263 | record_insn_num = 0; | |
264 | record_first.next = NULL; | |
265 | } | |
266 | else | |
267 | record_entry_release (rec); | |
69d05d38 HZ |
268 | } |
269 | ||
61f75dd8 MS |
270 | /* Free all record entries forward of the given list position. */ |
271 | ||
69d05d38 | 272 | static void |
61f75dd8 | 273 | record_list_release_following (struct record_entry *rec) |
69d05d38 | 274 | { |
69d05d38 | 275 | struct record_entry *tmp = rec->next; |
61f75dd8 | 276 | |
69d05d38 HZ |
277 | rec->next = NULL; |
278 | while (tmp) | |
279 | { | |
280 | rec = tmp->next; | |
61f75dd8 | 281 | if (record_entry_release (tmp) == record_end) |
69d05d38 | 282 | record_insn_num--; |
69d05d38 HZ |
283 | tmp = rec; |
284 | } | |
285 | } | |
286 | ||
265aad34 MS |
287 | /* Delete the first instruction from the beginning of the log, to make |
288 | room for adding a new instruction at the end of the log. | |
289 | ||
290 | Note -- this function does not modify record_insn_num. */ | |
291 | ||
69d05d38 HZ |
292 | static void |
293 | record_list_release_first (void) | |
294 | { | |
61f75dd8 | 295 | struct record_entry *tmp; |
69d05d38 HZ |
296 | |
297 | if (!record_first.next) | |
298 | return; | |
299 | ||
61f75dd8 | 300 | /* Loop until a record_end. */ |
69d05d38 HZ |
301 | while (1) |
302 | { | |
61f75dd8 | 303 | /* Cut record_first.next out of the linked list. */ |
69d05d38 HZ |
304 | tmp = record_first.next; |
305 | record_first.next = tmp->next; | |
61f75dd8 MS |
306 | tmp->next->prev = &record_first; |
307 | ||
308 | /* tmp is now isolated, and can be deleted. */ | |
309 | if (record_entry_release (tmp) == record_end) | |
310 | { | |
311 | record_insn_num--; | |
312 | break; /* End loop at first record_end. */ | |
313 | } | |
69d05d38 HZ |
314 | |
315 | if (!record_first.next) | |
316 | { | |
317 | gdb_assert (record_insn_num == 1); | |
61f75dd8 | 318 | break; /* End loop when list is empty. */ |
69d05d38 | 319 | } |
69d05d38 | 320 | } |
69d05d38 HZ |
321 | } |
322 | ||
323 | /* Add a struct record_entry to record_arch_list. */ | |
324 | ||
325 | static void | |
326 | record_arch_list_add (struct record_entry *rec) | |
327 | { | |
328 | if (record_debug > 1) | |
329 | fprintf_unfiltered (gdb_stdlog, | |
330 | "Process record: record_arch_list_add %s.\n", | |
331 | host_address_to_string (rec)); | |
332 | ||
333 | if (record_arch_list_tail) | |
334 | { | |
335 | record_arch_list_tail->next = rec; | |
336 | rec->prev = record_arch_list_tail; | |
337 | record_arch_list_tail = rec; | |
338 | } | |
339 | else | |
340 | { | |
341 | record_arch_list_head = rec; | |
342 | record_arch_list_tail = rec; | |
343 | } | |
344 | } | |
345 | ||
44389f9b MS |
346 | /* Return the value storage location of a record entry. */ |
347 | static inline gdb_byte * | |
348 | record_get_loc (struct record_entry *rec) | |
349 | { | |
350 | switch (rec->type) { | |
351 | case record_mem: | |
352 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
353 | return rec->u.mem.u.ptr; | |
354 | else | |
355 | return rec->u.mem.u.buf; | |
356 | case record_reg: | |
357 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
358 | return rec->u.reg.u.ptr; | |
359 | else | |
360 | return rec->u.reg.u.buf; | |
361 | case record_end: | |
362 | default: | |
363 | gdb_assert (0); | |
364 | return NULL; | |
365 | } | |
366 | } | |
367 | ||
368 | /* Record the value of a register NUM to record_arch_list. */ | |
69d05d38 HZ |
369 | |
370 | int | |
61f75dd8 | 371 | record_arch_list_add_reg (struct regcache *regcache, int regnum) |
69d05d38 HZ |
372 | { |
373 | struct record_entry *rec; | |
374 | ||
375 | if (record_debug > 1) | |
376 | fprintf_unfiltered (gdb_stdlog, | |
377 | "Process record: add register num = %d to " | |
378 | "record list.\n", | |
61f75dd8 | 379 | regnum); |
69d05d38 | 380 | |
61f75dd8 | 381 | rec = record_reg_alloc (regcache, regnum); |
69d05d38 | 382 | |
44389f9b | 383 | regcache_raw_read (regcache, regnum, record_get_loc (rec)); |
69d05d38 HZ |
384 | |
385 | record_arch_list_add (rec); | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | /* Record the value of a region of memory whose address is ADDR and | |
391 | length is LEN to record_arch_list. */ | |
392 | ||
393 | int | |
394 | record_arch_list_add_mem (CORE_ADDR addr, int len) | |
395 | { | |
396 | struct record_entry *rec; | |
397 | ||
398 | if (record_debug > 1) | |
399 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 | 400 | "Process record: add mem addr = %s len = %d to " |
69d05d38 | 401 | "record list.\n", |
5af949e3 | 402 | paddress (target_gdbarch, addr), len); |
69d05d38 | 403 | |
61f75dd8 | 404 | if (!addr) /* FIXME: Why? Some arch must permit it... */ |
69d05d38 HZ |
405 | return 0; |
406 | ||
61f75dd8 | 407 | rec = record_mem_alloc (addr, len); |
69d05d38 | 408 | |
44389f9b | 409 | if (target_read_memory (addr, record_get_loc (rec), len)) |
69d05d38 HZ |
410 | { |
411 | if (record_debug) | |
412 | fprintf_unfiltered (gdb_stdlog, | |
413 | "Process record: error reading memory at " | |
5af949e3 UW |
414 | "addr = %s len = %d.\n", |
415 | paddress (target_gdbarch, addr), len); | |
61f75dd8 | 416 | record_mem_release (rec); |
69d05d38 HZ |
417 | return -1; |
418 | } | |
419 | ||
420 | record_arch_list_add (rec); | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
425 | /* Add a record_end type struct record_entry to record_arch_list. */ | |
426 | ||
427 | int | |
428 | record_arch_list_add_end (void) | |
429 | { | |
430 | struct record_entry *rec; | |
431 | ||
432 | if (record_debug > 1) | |
433 | fprintf_unfiltered (gdb_stdlog, | |
434 | "Process record: add end to arch list.\n"); | |
435 | ||
61f75dd8 | 436 | rec = record_end_alloc (); |
8b739a96 | 437 | rec->u.end.sigval = TARGET_SIGNAL_0; |
69d05d38 HZ |
438 | |
439 | record_arch_list_add (rec); | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
444 | static void | |
445 | record_check_insn_num (int set_terminal) | |
446 | { | |
447 | if (record_insn_max_num) | |
448 | { | |
449 | gdb_assert (record_insn_num <= record_insn_max_num); | |
450 | if (record_insn_num == record_insn_max_num) | |
451 | { | |
452 | /* Ask user what to do. */ | |
453 | if (record_stop_at_limit) | |
454 | { | |
455 | int q; | |
456 | if (set_terminal) | |
457 | target_terminal_ours (); | |
458 | q = yquery (_("Do you want to auto delete previous execution " | |
459 | "log entries when record/replay buffer becomes " | |
460 | "full (record stop-at-limit)?")); | |
461 | if (set_terminal) | |
462 | target_terminal_inferior (); | |
463 | if (q) | |
464 | record_stop_at_limit = 0; | |
465 | else | |
466 | error (_("Process record: inferior program stopped.")); | |
467 | } | |
468 | } | |
469 | } | |
470 | } | |
471 | ||
472 | /* Before inferior step (when GDB record the running message, inferior | |
473 | only can step), GDB will call this function to record the values to | |
474 | record_list. This function will call gdbarch_process_record to | |
475 | record the running message of inferior and set them to | |
476 | record_arch_list, and add it to record_list. */ | |
477 | ||
478 | static void | |
479 | record_message_cleanups (void *ignore) | |
480 | { | |
481 | record_list_release (record_arch_list_tail); | |
482 | } | |
483 | ||
8b739a96 HZ |
484 | struct record_message_args { |
485 | struct regcache *regcache; | |
486 | enum target_signal signal; | |
487 | }; | |
488 | ||
69d05d38 HZ |
489 | static int |
490 | record_message (void *args) | |
491 | { | |
492 | int ret; | |
8b739a96 HZ |
493 | struct record_message_args *myargs = args; |
494 | struct gdbarch *gdbarch = get_regcache_arch (myargs->regcache); | |
69d05d38 HZ |
495 | struct cleanup *old_cleanups = make_cleanup (record_message_cleanups, 0); |
496 | ||
497 | record_arch_list_head = NULL; | |
498 | record_arch_list_tail = NULL; | |
499 | ||
500 | /* Check record_insn_num. */ | |
501 | record_check_insn_num (1); | |
502 | ||
8b739a96 HZ |
503 | /* If gdb sends a signal value to target_resume, |
504 | save it in the 'end' field of the previous instruction. | |
505 | ||
506 | Maybe process record should record what really happened, | |
507 | rather than what gdb pretends has happened. | |
508 | ||
509 | So if Linux delivered the signal to the child process during | |
510 | the record mode, we will record it and deliver it again in | |
511 | the replay mode. | |
512 | ||
513 | If user says "ignore this signal" during the record mode, then | |
514 | it will be ignored again during the replay mode (no matter if | |
515 | the user says something different, like "deliver this signal" | |
516 | during the replay mode). | |
517 | ||
518 | User should understand that nothing he does during the replay | |
519 | mode will change the behavior of the child. If he tries, | |
520 | then that is a user error. | |
521 | ||
522 | But we should still deliver the signal to gdb during the replay, | |
523 | if we delivered it during the recording. Therefore we should | |
524 | record the signal during record_wait, not record_resume. */ | |
525 | if (record_list != &record_first) /* FIXME better way to check */ | |
526 | { | |
527 | gdb_assert (record_list->type == record_end); | |
528 | record_list->u.end.sigval = myargs->signal; | |
529 | } | |
530 | ||
531 | if (myargs->signal == TARGET_SIGNAL_0 | |
532 | || !gdbarch_process_record_signal_p (gdbarch)) | |
533 | ret = gdbarch_process_record (gdbarch, | |
534 | myargs->regcache, | |
535 | regcache_read_pc (myargs->regcache)); | |
536 | else | |
537 | ret = gdbarch_process_record_signal (gdbarch, | |
538 | myargs->regcache, | |
539 | myargs->signal); | |
540 | ||
69d05d38 HZ |
541 | if (ret > 0) |
542 | error (_("Process record: inferior program stopped.")); | |
543 | if (ret < 0) | |
544 | error (_("Process record: failed to record execution log.")); | |
545 | ||
546 | discard_cleanups (old_cleanups); | |
547 | ||
548 | record_list->next = record_arch_list_head; | |
549 | record_arch_list_head->prev = record_list; | |
550 | record_list = record_arch_list_tail; | |
551 | ||
552 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
553 | record_list_release_first (); | |
554 | else | |
555 | record_insn_num++; | |
556 | ||
557 | return 1; | |
558 | } | |
559 | ||
560 | static int | |
8b739a96 HZ |
561 | do_record_message (struct regcache *regcache, |
562 | enum target_signal signal) | |
69d05d38 | 563 | { |
8b739a96 HZ |
564 | struct record_message_args args; |
565 | ||
566 | args.regcache = regcache; | |
567 | args.signal = signal; | |
568 | return catch_errors (record_message, &args, NULL, RETURN_MASK_ALL); | |
69d05d38 HZ |
569 | } |
570 | ||
571 | /* Set to 1 if record_store_registers and record_xfer_partial | |
572 | doesn't need record. */ | |
573 | ||
574 | static int record_gdb_operation_disable = 0; | |
575 | ||
576 | struct cleanup * | |
577 | record_gdb_operation_disable_set (void) | |
578 | { | |
579 | struct cleanup *old_cleanups = NULL; | |
580 | ||
581 | old_cleanups = | |
582 | make_cleanup_restore_integer (&record_gdb_operation_disable); | |
583 | record_gdb_operation_disable = 1; | |
584 | ||
585 | return old_cleanups; | |
586 | } | |
587 | ||
588 | static void | |
589 | record_open (char *name, int from_tty) | |
590 | { | |
591 | struct target_ops *t; | |
592 | ||
593 | if (record_debug) | |
594 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
595 | ||
596 | /* check exec */ | |
597 | if (!target_has_execution) | |
598 | error (_("Process record: the program is not being run.")); | |
599 | if (non_stop) | |
600 | error (_("Process record target can't debug inferior in non-stop mode " | |
601 | "(non-stop).")); | |
602 | if (target_async_permitted) | |
603 | error (_("Process record target can't debug inferior in asynchronous " | |
604 | "mode (target-async).")); | |
605 | ||
a97b0ac8 | 606 | if (!gdbarch_process_record_p (target_gdbarch)) |
69d05d38 HZ |
607 | error (_("Process record: the current architecture doesn't support " |
608 | "record function.")); | |
609 | ||
610 | /* Check if record target is already running. */ | |
611 | if (current_target.to_stratum == record_stratum) | |
5d40bb85 HZ |
612 | error (_("Process record target already running. Use \"record stop\" to " |
613 | "stop record target first.")); | |
69d05d38 HZ |
614 | |
615 | /*Reset the beneath function pointers. */ | |
616 | record_beneath_to_resume = NULL; | |
617 | record_beneath_to_wait = NULL; | |
618 | record_beneath_to_store_registers = NULL; | |
619 | record_beneath_to_xfer_partial = NULL; | |
620 | record_beneath_to_insert_breakpoint = NULL; | |
621 | record_beneath_to_remove_breakpoint = NULL; | |
622 | ||
623 | /* Set the beneath function pointers. */ | |
624 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
625 | { | |
626 | if (!record_beneath_to_resume) | |
627 | { | |
628 | record_beneath_to_resume = t->to_resume; | |
629 | record_beneath_to_resume_ops = t; | |
630 | } | |
631 | if (!record_beneath_to_wait) | |
632 | { | |
633 | record_beneath_to_wait = t->to_wait; | |
634 | record_beneath_to_wait_ops = t; | |
635 | } | |
636 | if (!record_beneath_to_store_registers) | |
637 | { | |
638 | record_beneath_to_store_registers = t->to_store_registers; | |
639 | record_beneath_to_store_registers_ops = t; | |
640 | } | |
641 | if (!record_beneath_to_xfer_partial) | |
642 | { | |
643 | record_beneath_to_xfer_partial = t->to_xfer_partial; | |
644 | record_beneath_to_xfer_partial_ops = t; | |
645 | } | |
646 | if (!record_beneath_to_insert_breakpoint) | |
647 | record_beneath_to_insert_breakpoint = t->to_insert_breakpoint; | |
648 | if (!record_beneath_to_remove_breakpoint) | |
649 | record_beneath_to_remove_breakpoint = t->to_remove_breakpoint; | |
650 | } | |
651 | if (!record_beneath_to_resume) | |
652 | error (_("Process record can't get to_resume.")); | |
653 | if (!record_beneath_to_wait) | |
654 | error (_("Process record can't get to_wait.")); | |
655 | if (!record_beneath_to_store_registers) | |
656 | error (_("Process record can't get to_store_registers.")); | |
657 | if (!record_beneath_to_xfer_partial) | |
658 | error (_("Process record can't get to_xfer_partial.")); | |
659 | if (!record_beneath_to_insert_breakpoint) | |
660 | error (_("Process record can't get to_insert_breakpoint.")); | |
661 | if (!record_beneath_to_remove_breakpoint) | |
662 | error (_("Process record can't get to_remove_breakpoint.")); | |
663 | ||
664 | push_target (&record_ops); | |
665 | ||
666 | /* Reset */ | |
667 | record_insn_num = 0; | |
668 | record_list = &record_first; | |
669 | record_list->next = NULL; | |
670 | } | |
671 | ||
672 | static void | |
673 | record_close (int quitting) | |
674 | { | |
675 | if (record_debug) | |
676 | fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n"); | |
677 | ||
678 | record_list_release (record_list); | |
679 | } | |
680 | ||
681 | static int record_resume_step = 0; | |
69d05d38 HZ |
682 | static int record_resume_error; |
683 | ||
684 | static void | |
685 | record_resume (struct target_ops *ops, ptid_t ptid, int step, | |
8b739a96 | 686 | enum target_signal signal) |
69d05d38 HZ |
687 | { |
688 | record_resume_step = step; | |
69d05d38 HZ |
689 | |
690 | if (!RECORD_IS_REPLAY) | |
691 | { | |
8b739a96 | 692 | if (do_record_message (get_current_regcache (), signal)) |
69d05d38 HZ |
693 | { |
694 | record_resume_error = 0; | |
695 | } | |
696 | else | |
697 | { | |
698 | record_resume_error = 1; | |
699 | return; | |
700 | } | |
701 | record_beneath_to_resume (record_beneath_to_resume_ops, ptid, 1, | |
8b739a96 | 702 | signal); |
69d05d38 HZ |
703 | } |
704 | } | |
705 | ||
706 | static int record_get_sig = 0; | |
707 | ||
708 | static void | |
709 | record_sig_handler (int signo) | |
710 | { | |
711 | if (record_debug) | |
712 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
713 | ||
714 | /* It will break the running inferior in replay mode. */ | |
715 | record_resume_step = 1; | |
716 | ||
717 | /* It will let record_wait set inferior status to get the signal | |
718 | SIGINT. */ | |
719 | record_get_sig = 1; | |
720 | } | |
721 | ||
722 | static void | |
723 | record_wait_cleanups (void *ignore) | |
724 | { | |
725 | if (execution_direction == EXEC_REVERSE) | |
726 | { | |
727 | if (record_list->next) | |
728 | record_list = record_list->next; | |
729 | } | |
730 | else | |
731 | record_list = record_list->prev; | |
732 | } | |
733 | ||
734 | /* In replay mode, this function examines the recorded log and | |
735 | determines where to stop. */ | |
736 | ||
737 | static ptid_t | |
738 | record_wait (struct target_ops *ops, | |
47608cb1 PA |
739 | ptid_t ptid, struct target_waitstatus *status, |
740 | int options) | |
69d05d38 HZ |
741 | { |
742 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
743 | ||
744 | if (record_debug) | |
745 | fprintf_unfiltered (gdb_stdlog, | |
746 | "Process record: record_wait " | |
747 | "record_resume_step = %d\n", | |
748 | record_resume_step); | |
749 | ||
750 | if (!RECORD_IS_REPLAY) | |
751 | { | |
752 | if (record_resume_error) | |
753 | { | |
754 | /* If record_resume get error, return directly. */ | |
755 | status->kind = TARGET_WAITKIND_STOPPED; | |
756 | status->value.sig = TARGET_SIGNAL_ABRT; | |
757 | return inferior_ptid; | |
758 | } | |
759 | ||
760 | if (record_resume_step) | |
761 | { | |
762 | /* This is a single step. */ | |
763 | return record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 764 | ptid, status, options); |
69d05d38 HZ |
765 | } |
766 | else | |
767 | { | |
768 | /* This is not a single step. */ | |
769 | ptid_t ret; | |
770 | CORE_ADDR tmp_pc; | |
771 | ||
772 | while (1) | |
773 | { | |
774 | ret = record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 775 | ptid, status, options); |
69d05d38 | 776 | |
8b739a96 | 777 | /* Is this a SIGTRAP? */ |
69d05d38 HZ |
778 | if (status->kind == TARGET_WAITKIND_STOPPED |
779 | && status->value.sig == TARGET_SIGNAL_TRAP) | |
780 | { | |
8b739a96 | 781 | /* Yes -- check if there is a breakpoint. */ |
69d05d38 | 782 | registers_changed (); |
fb14de7b | 783 | tmp_pc = regcache_read_pc (get_current_regcache ()); |
69d05d38 HZ |
784 | if (breakpoint_inserted_here_p (tmp_pc)) |
785 | { | |
8b739a96 | 786 | /* There is a breakpoint. GDB will want to stop. */ |
69d05d38 HZ |
787 | CORE_ADDR decr_pc_after_break = |
788 | gdbarch_decr_pc_after_break | |
789 | (get_regcache_arch (get_current_regcache ())); | |
790 | if (decr_pc_after_break) | |
791 | { | |
792 | regcache_write_pc (get_thread_regcache (ret), | |
793 | tmp_pc + decr_pc_after_break); | |
794 | } | |
795 | } | |
796 | else | |
797 | { | |
8b739a96 HZ |
798 | /* There is not a breakpoint, and gdb is not |
799 | stepping, therefore gdb will not stop. | |
800 | Therefore we will not return to gdb. | |
801 | Record the insn and resume. */ | |
802 | if (!do_record_message (get_current_regcache (), | |
803 | TARGET_SIGNAL_0)) | |
69d05d38 HZ |
804 | { |
805 | break; | |
806 | } | |
807 | record_beneath_to_resume (record_beneath_to_resume_ops, | |
808 | ptid, 1, | |
88fef440 | 809 | TARGET_SIGNAL_0); |
69d05d38 HZ |
810 | continue; |
811 | } | |
812 | } | |
813 | ||
814 | /* The inferior is broken by a breakpoint or a signal. */ | |
815 | break; | |
816 | } | |
817 | ||
818 | return ret; | |
819 | } | |
820 | } | |
821 | else | |
822 | { | |
823 | struct regcache *regcache = get_current_regcache (); | |
5af949e3 | 824 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
69d05d38 HZ |
825 | int continue_flag = 1; |
826 | int first_record_end = 1; | |
827 | struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0); | |
828 | CORE_ADDR tmp_pc; | |
829 | ||
830 | status->kind = TARGET_WAITKIND_STOPPED; | |
831 | ||
832 | /* Check breakpoint when forward execute. */ | |
833 | if (execution_direction == EXEC_FORWARD) | |
834 | { | |
835 | tmp_pc = regcache_read_pc (regcache); | |
836 | if (breakpoint_inserted_here_p (tmp_pc)) | |
837 | { | |
838 | if (record_debug) | |
839 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 UW |
840 | "Process record: break at %s.\n", |
841 | paddress (gdbarch, tmp_pc)); | |
842 | if (gdbarch_decr_pc_after_break (gdbarch) | |
69d05d38 HZ |
843 | && !record_resume_step) |
844 | regcache_write_pc (regcache, | |
845 | tmp_pc + | |
5af949e3 | 846 | gdbarch_decr_pc_after_break (gdbarch)); |
69d05d38 HZ |
847 | goto replay_out; |
848 | } | |
849 | } | |
850 | ||
851 | record_get_sig = 0; | |
852 | signal (SIGINT, record_sig_handler); | |
853 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
854 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
855 | mode, because inferior will not executed. | |
856 | Then set it to terminal_ours to make GDB get the signal. */ | |
857 | target_terminal_ours (); | |
858 | ||
859 | /* In EXEC_FORWARD mode, record_list points to the tail of prev | |
860 | instruction. */ | |
861 | if (execution_direction == EXEC_FORWARD && record_list->next) | |
862 | record_list = record_list->next; | |
863 | ||
864 | /* Loop over the record_list, looking for the next place to | |
865 | stop. */ | |
866 | do | |
867 | { | |
868 | /* Check for beginning and end of log. */ | |
869 | if (execution_direction == EXEC_REVERSE | |
870 | && record_list == &record_first) | |
871 | { | |
872 | /* Hit beginning of record log in reverse. */ | |
873 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
874 | break; | |
875 | } | |
876 | if (execution_direction != EXEC_REVERSE && !record_list->next) | |
877 | { | |
878 | /* Hit end of record log going forward. */ | |
879 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
880 | break; | |
881 | } | |
882 | ||
883 | /* Set ptid, register and memory according to record_list. */ | |
884 | if (record_list->type == record_reg) | |
885 | { | |
886 | /* reg */ | |
887 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
888 | if (record_debug > 1) | |
889 | fprintf_unfiltered (gdb_stdlog, | |
890 | "Process record: record_reg %s to " | |
891 | "inferior num = %d.\n", | |
892 | host_address_to_string (record_list), | |
893 | record_list->u.reg.num); | |
894 | regcache_cooked_read (regcache, record_list->u.reg.num, reg); | |
895 | regcache_cooked_write (regcache, record_list->u.reg.num, | |
44389f9b MS |
896 | record_get_loc (record_list)); |
897 | memcpy (record_get_loc (record_list), reg, | |
898 | record_list->u.reg.len); | |
69d05d38 HZ |
899 | } |
900 | else if (record_list->type == record_mem) | |
901 | { | |
902 | /* mem */ | |
afd0cd3f MS |
903 | /* Nothing to do if the entry is flagged not_accessible. */ |
904 | if (!record_list->u.mem.mem_entry_not_accessible) | |
905 | { | |
906 | gdb_byte *mem = alloca (record_list->u.mem.len); | |
907 | if (record_debug > 1) | |
908 | fprintf_unfiltered (gdb_stdlog, | |
909 | "Process record: record_mem %s to " | |
910 | "inferior addr = %s len = %d.\n", | |
911 | host_address_to_string (record_list), | |
912 | paddress (gdbarch, | |
913 | record_list->u.mem.addr), | |
914 | record_list->u.mem.len); | |
915 | ||
916 | if (target_read_memory (record_list->u.mem.addr, mem, | |
917 | record_list->u.mem.len)) | |
918 | { | |
919 | if (execution_direction != EXEC_REVERSE) | |
920 | error (_("Process record: error reading memory at " | |
921 | "addr = %s len = %d."), | |
922 | paddress (gdbarch, record_list->u.mem.addr), | |
923 | record_list->u.mem.len); | |
924 | else | |
925 | /* Read failed -- | |
926 | flag entry as not_accessible. */ | |
927 | record_list->u.mem.mem_entry_not_accessible = 1; | |
928 | } | |
929 | else | |
930 | { | |
931 | if (target_write_memory (record_list->u.mem.addr, | |
44389f9b | 932 | record_get_loc (record_list), |
afd0cd3f MS |
933 | record_list->u.mem.len)) |
934 | { | |
935 | if (execution_direction != EXEC_REVERSE) | |
936 | error (_("Process record: error writing memory at " | |
937 | "addr = %s len = %d."), | |
938 | paddress (gdbarch, record_list->u.mem.addr), | |
939 | record_list->u.mem.len); | |
940 | else | |
941 | /* Write failed -- | |
942 | flag entry as not_accessible. */ | |
943 | record_list->u.mem.mem_entry_not_accessible = 1; | |
944 | } | |
945 | else | |
946 | { | |
44389f9b | 947 | memcpy (record_get_loc (record_list), mem, |
afd0cd3f MS |
948 | record_list->u.mem.len); |
949 | } | |
950 | } | |
951 | } | |
69d05d38 HZ |
952 | } |
953 | else | |
954 | { | |
955 | if (record_debug > 1) | |
956 | fprintf_unfiltered (gdb_stdlog, | |
957 | "Process record: record_end %s to " | |
958 | "inferior.\n", | |
959 | host_address_to_string (record_list)); | |
960 | ||
961 | if (first_record_end && execution_direction == EXEC_REVERSE) | |
962 | { | |
963 | /* When reverse excute, the first record_end is the part of | |
964 | current instruction. */ | |
965 | first_record_end = 0; | |
966 | } | |
967 | else | |
968 | { | |
969 | /* In EXEC_REVERSE mode, this is the record_end of prev | |
970 | instruction. | |
971 | In EXEC_FORWARD mode, this is the record_end of current | |
972 | instruction. */ | |
973 | /* step */ | |
974 | if (record_resume_step) | |
975 | { | |
976 | if (record_debug > 1) | |
977 | fprintf_unfiltered (gdb_stdlog, | |
978 | "Process record: step.\n"); | |
979 | continue_flag = 0; | |
980 | } | |
981 | ||
982 | /* check breakpoint */ | |
983 | tmp_pc = regcache_read_pc (regcache); | |
984 | if (breakpoint_inserted_here_p (tmp_pc)) | |
985 | { | |
986 | if (record_debug) | |
987 | fprintf_unfiltered (gdb_stdlog, | |
988 | "Process record: break " | |
5af949e3 UW |
989 | "at %s.\n", |
990 | paddress (gdbarch, tmp_pc)); | |
991 | if (gdbarch_decr_pc_after_break (gdbarch) | |
69d05d38 HZ |
992 | && execution_direction == EXEC_FORWARD |
993 | && !record_resume_step) | |
994 | regcache_write_pc (regcache, | |
995 | tmp_pc + | |
5af949e3 | 996 | gdbarch_decr_pc_after_break (gdbarch)); |
69d05d38 HZ |
997 | continue_flag = 0; |
998 | } | |
8b739a96 HZ |
999 | /* Check target signal */ |
1000 | if (record_list->u.end.sigval != TARGET_SIGNAL_0) | |
1001 | /* FIXME: better way to check */ | |
1002 | continue_flag = 0; | |
69d05d38 HZ |
1003 | } |
1004 | } | |
1005 | ||
1006 | if (continue_flag) | |
1007 | { | |
1008 | if (execution_direction == EXEC_REVERSE) | |
1009 | { | |
1010 | if (record_list->prev) | |
1011 | record_list = record_list->prev; | |
1012 | } | |
1013 | else | |
1014 | { | |
1015 | if (record_list->next) | |
1016 | record_list = record_list->next; | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | while (continue_flag); | |
1021 | ||
1022 | signal (SIGINT, handle_sigint); | |
1023 | ||
1024 | replay_out: | |
1025 | if (record_get_sig) | |
1026 | status->value.sig = TARGET_SIGNAL_INT; | |
8b739a96 HZ |
1027 | else if (record_list->u.end.sigval != TARGET_SIGNAL_0) |
1028 | /* FIXME: better way to check */ | |
1029 | status->value.sig = record_list->u.end.sigval; | |
69d05d38 HZ |
1030 | else |
1031 | status->value.sig = TARGET_SIGNAL_TRAP; | |
1032 | ||
1033 | discard_cleanups (old_cleanups); | |
1034 | } | |
1035 | ||
1036 | do_cleanups (set_cleanups); | |
1037 | return inferior_ptid; | |
1038 | } | |
1039 | ||
1040 | static void | |
1041 | record_disconnect (struct target_ops *target, char *args, int from_tty) | |
1042 | { | |
1043 | if (record_debug) | |
1044 | fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n"); | |
1045 | ||
1046 | unpush_target (&record_ops); | |
1047 | target_disconnect (args, from_tty); | |
1048 | } | |
1049 | ||
1050 | static void | |
1051 | record_detach (struct target_ops *ops, char *args, int from_tty) | |
1052 | { | |
1053 | if (record_debug) | |
1054 | fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n"); | |
1055 | ||
1056 | unpush_target (&record_ops); | |
1057 | target_detach (args, from_tty); | |
1058 | } | |
1059 | ||
1060 | static void | |
1061 | record_mourn_inferior (struct target_ops *ops) | |
1062 | { | |
1063 | if (record_debug) | |
1064 | fprintf_unfiltered (gdb_stdlog, "Process record: " | |
1065 | "record_mourn_inferior\n"); | |
1066 | ||
1067 | unpush_target (&record_ops); | |
1068 | target_mourn_inferior (); | |
1069 | } | |
1070 | ||
1071 | /* Close process record target before killing the inferior process. */ | |
1072 | ||
1073 | static void | |
1074 | record_kill (struct target_ops *ops) | |
1075 | { | |
1076 | if (record_debug) | |
1077 | fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n"); | |
1078 | ||
1079 | unpush_target (&record_ops); | |
1080 | target_kill (); | |
1081 | } | |
1082 | ||
1083 | /* Record registers change (by user or by GDB) to list as an instruction. */ | |
1084 | ||
1085 | static void | |
1086 | record_registers_change (struct regcache *regcache, int regnum) | |
1087 | { | |
1088 | /* Check record_insn_num. */ | |
1089 | record_check_insn_num (0); | |
1090 | ||
1091 | record_arch_list_head = NULL; | |
1092 | record_arch_list_tail = NULL; | |
1093 | ||
1094 | if (regnum < 0) | |
1095 | { | |
1096 | int i; | |
1097 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
1098 | { | |
1099 | if (record_arch_list_add_reg (regcache, i)) | |
1100 | { | |
1101 | record_list_release (record_arch_list_tail); | |
1102 | error (_("Process record: failed to record execution log.")); | |
1103 | } | |
1104 | } | |
1105 | } | |
1106 | else | |
1107 | { | |
1108 | if (record_arch_list_add_reg (regcache, regnum)) | |
1109 | { | |
1110 | record_list_release (record_arch_list_tail); | |
1111 | error (_("Process record: failed to record execution log.")); | |
1112 | } | |
1113 | } | |
1114 | if (record_arch_list_add_end ()) | |
1115 | { | |
1116 | record_list_release (record_arch_list_tail); | |
1117 | error (_("Process record: failed to record execution log.")); | |
1118 | } | |
1119 | record_list->next = record_arch_list_head; | |
1120 | record_arch_list_head->prev = record_list; | |
1121 | record_list = record_arch_list_tail; | |
1122 | ||
1123 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1124 | record_list_release_first (); | |
1125 | else | |
1126 | record_insn_num++; | |
1127 | } | |
1128 | ||
1129 | static void | |
1130 | record_store_registers (struct target_ops *ops, struct regcache *regcache, | |
1131 | int regno) | |
1132 | { | |
1133 | if (!record_gdb_operation_disable) | |
1134 | { | |
1135 | if (RECORD_IS_REPLAY) | |
1136 | { | |
1137 | int n; | |
69d05d38 HZ |
1138 | |
1139 | /* Let user choose if he wants to write register or not. */ | |
1140 | if (regno < 0) | |
1141 | n = | |
604ad007 JB |
1142 | query (_("Because GDB is in replay mode, changing the " |
1143 | "value of a register will make the execution " | |
1144 | "log unusable from this point onward. " | |
1145 | "Change all registers?")); | |
69d05d38 HZ |
1146 | else |
1147 | n = | |
604ad007 JB |
1148 | query (_("Because GDB is in replay mode, changing the value " |
1149 | "of a register will make the execution log unusable " | |
1150 | "from this point onward. Change register %s?"), | |
69d05d38 HZ |
1151 | gdbarch_register_name (get_regcache_arch (regcache), |
1152 | regno)); | |
1153 | ||
1154 | if (!n) | |
1155 | { | |
1156 | /* Invalidate the value of regcache that was set in function | |
1157 | "regcache_raw_write". */ | |
1158 | if (regno < 0) | |
1159 | { | |
1160 | int i; | |
1161 | for (i = 0; | |
1162 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1163 | i++) | |
1164 | regcache_invalidate (regcache, i); | |
1165 | } | |
1166 | else | |
1167 | regcache_invalidate (regcache, regno); | |
1168 | ||
1169 | error (_("Process record canceled the operation.")); | |
1170 | } | |
1171 | ||
1172 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1173 | record_list_release_following (record_list); |
69d05d38 HZ |
1174 | } |
1175 | ||
1176 | record_registers_change (regcache, regno); | |
1177 | } | |
1178 | record_beneath_to_store_registers (record_beneath_to_store_registers_ops, | |
1179 | regcache, regno); | |
1180 | } | |
1181 | ||
1182 | /* Behavior is conditional on RECORD_IS_REPLAY. | |
1183 | In replay mode, we cannot write memory unles we are willing to | |
1184 | invalidate the record/replay log from this point forward. */ | |
1185 | ||
1186 | static LONGEST | |
1187 | record_xfer_partial (struct target_ops *ops, enum target_object object, | |
1188 | const char *annex, gdb_byte *readbuf, | |
1189 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
1190 | { | |
1191 | if (!record_gdb_operation_disable | |
1192 | && (object == TARGET_OBJECT_MEMORY | |
1193 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1194 | { | |
1195 | if (RECORD_IS_REPLAY) | |
1196 | { | |
1197 | /* Let user choose if he wants to write memory or not. */ | |
604ad007 JB |
1198 | if (!query (_("Because GDB is in replay mode, writing to memory " |
1199 | "will make the execution log unusable from this " | |
1200 | "point onward. Write memory at address %s?"), | |
5af949e3 | 1201 | paddress (target_gdbarch, offset))) |
9a9dc473 | 1202 | error (_("Process record canceled the operation.")); |
69d05d38 HZ |
1203 | |
1204 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1205 | record_list_release_following (record_list); |
69d05d38 HZ |
1206 | } |
1207 | ||
1208 | /* Check record_insn_num */ | |
1209 | record_check_insn_num (0); | |
1210 | ||
1211 | /* Record registers change to list as an instruction. */ | |
1212 | record_arch_list_head = NULL; | |
1213 | record_arch_list_tail = NULL; | |
1214 | if (record_arch_list_add_mem (offset, len)) | |
1215 | { | |
1216 | record_list_release (record_arch_list_tail); | |
1217 | if (record_debug) | |
1218 | fprintf_unfiltered (gdb_stdlog, | |
1219 | _("Process record: failed to record " | |
1220 | "execution log.")); | |
1221 | return -1; | |
1222 | } | |
1223 | if (record_arch_list_add_end ()) | |
1224 | { | |
1225 | record_list_release (record_arch_list_tail); | |
1226 | if (record_debug) | |
1227 | fprintf_unfiltered (gdb_stdlog, | |
1228 | _("Process record: failed to record " | |
1229 | "execution log.")); | |
1230 | return -1; | |
1231 | } | |
1232 | record_list->next = record_arch_list_head; | |
1233 | record_arch_list_head->prev = record_list; | |
1234 | record_list = record_arch_list_tail; | |
1235 | ||
1236 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1237 | record_list_release_first (); | |
1238 | else | |
1239 | record_insn_num++; | |
1240 | } | |
1241 | ||
1242 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
1243 | object, annex, readbuf, writebuf, | |
1244 | offset, len); | |
1245 | } | |
1246 | ||
1247 | /* Behavior is conditional on RECORD_IS_REPLAY. | |
1248 | We will not actually insert or remove breakpoints when replaying, | |
1249 | nor when recording. */ | |
1250 | ||
1251 | static int | |
a6d9a66e UW |
1252 | record_insert_breakpoint (struct gdbarch *gdbarch, |
1253 | struct bp_target_info *bp_tgt) | |
69d05d38 HZ |
1254 | { |
1255 | if (!RECORD_IS_REPLAY) | |
1256 | { | |
1257 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); | |
a6d9a66e | 1258 | int ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt); |
69d05d38 HZ |
1259 | |
1260 | do_cleanups (old_cleanups); | |
1261 | ||
1262 | return ret; | |
1263 | } | |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | static int | |
a6d9a66e UW |
1269 | record_remove_breakpoint (struct gdbarch *gdbarch, |
1270 | struct bp_target_info *bp_tgt) | |
69d05d38 HZ |
1271 | { |
1272 | if (!RECORD_IS_REPLAY) | |
1273 | { | |
1274 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); | |
a6d9a66e | 1275 | int ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt); |
69d05d38 HZ |
1276 | |
1277 | do_cleanups (old_cleanups); | |
1278 | ||
1279 | return ret; | |
1280 | } | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static int | |
1286 | record_can_execute_reverse (void) | |
1287 | { | |
1288 | return 1; | |
1289 | } | |
1290 | ||
1291 | static void | |
1292 | init_record_ops (void) | |
1293 | { | |
1294 | record_ops.to_shortname = "record"; | |
1295 | record_ops.to_longname = "Process record and replay target"; | |
1296 | record_ops.to_doc = | |
1297 | "Log program while executing and replay execution from log."; | |
1298 | record_ops.to_open = record_open; | |
1299 | record_ops.to_close = record_close; | |
1300 | record_ops.to_resume = record_resume; | |
1301 | record_ops.to_wait = record_wait; | |
1302 | record_ops.to_disconnect = record_disconnect; | |
1303 | record_ops.to_detach = record_detach; | |
1304 | record_ops.to_mourn_inferior = record_mourn_inferior; | |
1305 | record_ops.to_kill = record_kill; | |
1306 | record_ops.to_create_inferior = find_default_create_inferior; | |
1307 | record_ops.to_store_registers = record_store_registers; | |
1308 | record_ops.to_xfer_partial = record_xfer_partial; | |
1309 | record_ops.to_insert_breakpoint = record_insert_breakpoint; | |
1310 | record_ops.to_remove_breakpoint = record_remove_breakpoint; | |
1311 | record_ops.to_can_execute_reverse = record_can_execute_reverse; | |
1312 | record_ops.to_stratum = record_stratum; | |
1313 | record_ops.to_magic = OPS_MAGIC; | |
1314 | } | |
1315 | ||
1316 | static void | |
1317 | show_record_debug (struct ui_file *file, int from_tty, | |
1318 | struct cmd_list_element *c, const char *value) | |
1319 | { | |
1320 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), | |
1321 | value); | |
1322 | } | |
1323 | ||
1324 | /* Alias for "target record". */ | |
1325 | ||
1326 | static void | |
1327 | cmd_record_start (char *args, int from_tty) | |
1328 | { | |
1329 | execute_command ("target record", from_tty); | |
1330 | } | |
1331 | ||
1332 | /* Truncate the record log from the present point | |
1333 | of replay until the end. */ | |
1334 | ||
1335 | static void | |
1336 | cmd_record_delete (char *args, int from_tty) | |
1337 | { | |
1338 | if (current_target.to_stratum == record_stratum) | |
1339 | { | |
1340 | if (RECORD_IS_REPLAY) | |
1341 | { | |
1342 | if (!from_tty || query (_("Delete the log from this point forward " | |
1343 | "and begin to record the running message " | |
1344 | "at current PC?"))) | |
61f75dd8 | 1345 | record_list_release_following (record_list); |
69d05d38 HZ |
1346 | } |
1347 | else | |
1348 | printf_unfiltered (_("Already at end of record list.\n")); | |
1349 | ||
1350 | } | |
1351 | else | |
1352 | printf_unfiltered (_("Process record is not started.\n")); | |
1353 | } | |
1354 | ||
1355 | /* Implement the "stoprecord" command. */ | |
1356 | ||
1357 | static void | |
1358 | cmd_record_stop (char *args, int from_tty) | |
1359 | { | |
1360 | if (current_target.to_stratum == record_stratum) | |
1361 | { | |
5d40bb85 HZ |
1362 | unpush_target (&record_ops); |
1363 | printf_unfiltered (_("Process record is stoped and all execution " | |
1364 | "log is deleted.\n")); | |
69d05d38 HZ |
1365 | } |
1366 | else | |
1367 | printf_unfiltered (_("Process record is not started.\n")); | |
1368 | } | |
1369 | ||
1370 | /* Set upper limit of record log size. */ | |
1371 | ||
1372 | static void | |
1373 | set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c) | |
1374 | { | |
1375 | if (record_insn_num > record_insn_max_num && record_insn_max_num) | |
1376 | { | |
265aad34 | 1377 | /* Count down record_insn_num while releasing records from list. */ |
69d05d38 | 1378 | while (record_insn_num > record_insn_max_num) |
265aad34 MS |
1379 | { |
1380 | record_list_release_first (); | |
1381 | record_insn_num--; | |
1382 | } | |
69d05d38 HZ |
1383 | } |
1384 | } | |
1385 | ||
1386 | /* Print the current index into the record log (number of insns recorded | |
1387 | so far). */ | |
1388 | ||
1389 | static void | |
1390 | show_record_insn_number (char *ignore, int from_tty) | |
1391 | { | |
1392 | printf_unfiltered (_("Record instruction number is %d.\n"), | |
1393 | record_insn_num); | |
1394 | } | |
1395 | ||
1396 | static struct cmd_list_element *record_cmdlist, *set_record_cmdlist, | |
1397 | *show_record_cmdlist, *info_record_cmdlist; | |
1398 | ||
1399 | static void | |
1400 | set_record_command (char *args, int from_tty) | |
1401 | { | |
1402 | printf_unfiltered (_("\ | |
1403 | \"set record\" must be followed by an apporpriate subcommand.\n")); | |
1404 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); | |
1405 | } | |
1406 | ||
1407 | static void | |
1408 | show_record_command (char *args, int from_tty) | |
1409 | { | |
1410 | cmd_show_list (show_record_cmdlist, from_tty, ""); | |
1411 | } | |
1412 | ||
1413 | static void | |
1414 | info_record_command (char *args, int from_tty) | |
1415 | { | |
1416 | cmd_show_list (info_record_cmdlist, from_tty, ""); | |
1417 | } | |
1418 | ||
1419 | void | |
1420 | _initialize_record (void) | |
1421 | { | |
1422 | /* Init record_first. */ | |
1423 | record_first.prev = NULL; | |
1424 | record_first.next = NULL; | |
1425 | record_first.type = record_end; | |
1426 | ||
1427 | init_record_ops (); | |
1428 | add_target (&record_ops); | |
1429 | ||
1430 | add_setshow_zinteger_cmd ("record", no_class, &record_debug, | |
1431 | _("Set debugging of record/replay feature."), | |
1432 | _("Show debugging of record/replay feature."), | |
1433 | _("When enabled, debugging output for " | |
1434 | "record/replay feature is displayed."), | |
1435 | NULL, show_record_debug, &setdebuglist, | |
1436 | &showdebuglist); | |
1437 | ||
1438 | add_prefix_cmd ("record", class_obscure, cmd_record_start, | |
1439 | _("Abbreviated form of \"target record\" command."), | |
1440 | &record_cmdlist, "record ", 0, &cmdlist); | |
1441 | add_com_alias ("rec", "record", class_obscure, 1); | |
1442 | add_prefix_cmd ("record", class_support, set_record_command, | |
1443 | _("Set record options"), &set_record_cmdlist, | |
1444 | "set record ", 0, &setlist); | |
1445 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); | |
1446 | add_prefix_cmd ("record", class_support, show_record_command, | |
1447 | _("Show record options"), &show_record_cmdlist, | |
1448 | "show record ", 0, &showlist); | |
1449 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); | |
1450 | add_prefix_cmd ("record", class_support, info_record_command, | |
1451 | _("Info record options"), &info_record_cmdlist, | |
1452 | "info record ", 0, &infolist); | |
1453 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); | |
1454 | ||
1455 | ||
1456 | add_cmd ("delete", class_obscure, cmd_record_delete, | |
1457 | _("Delete the rest of execution log and start recording it anew."), | |
1458 | &record_cmdlist); | |
1459 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); | |
1460 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); | |
1461 | ||
1462 | add_cmd ("stop", class_obscure, cmd_record_stop, | |
1463 | _("Stop the record/replay target."), | |
1464 | &record_cmdlist); | |
1465 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); | |
1466 | ||
1467 | /* Record instructions number limit command. */ | |
1468 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
fda458ee | 1469 | &record_stop_at_limit, _("\ |
299a410e EZ |
1470 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
1471 | Show whether record/replay stops when record/replay buffer becomes full."), _("\ | |
1472 | Default is ON.\n\ | |
1473 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
1474 | When OFF, if the record/replay buffer becomes full,\n\ | |
1475 | delete the oldest recorded instruction to make room for each new one."), | |
fda458ee MS |
1476 | NULL, NULL, |
1477 | &set_record_cmdlist, &show_record_cmdlist); | |
191e1813 | 1478 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
69d05d38 HZ |
1479 | &record_insn_max_num, |
1480 | _("Set record/replay buffer limit."), | |
299a410e EZ |
1481 | _("Show record/replay buffer limit."), _("\ |
1482 | Set the maximum number of instructions to be stored in the\n\ | |
1483 | record/replay buffer. Zero means unlimited. Default is 200000."), | |
69d05d38 HZ |
1484 | set_record_insn_max_num, |
1485 | NULL, &set_record_cmdlist, &show_record_cmdlist); | |
1486 | add_cmd ("insn-number", class_obscure, show_record_insn_number, | |
fda458ee MS |
1487 | _("Show the current number of instructions in the " |
1488 | "record/replay buffer."), &info_record_cmdlist); | |
69d05d38 | 1489 | } |