Commit | Line | Data |
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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" | |
0156b218 MS |
26 | #include "completer.h" |
27 | #include "arch-utils.h" | |
27699eea MS |
28 | #include "gdbcore.h" |
29 | #include "exec.h" | |
69d05d38 | 30 | #include "record.h" |
0156b218 MS |
31 | #include "elf-bfd.h" |
32 | #include "gcore.h" | |
69d05d38 | 33 | |
0156b218 | 34 | #include <byteswap.h> |
69d05d38 HZ |
35 | #include <signal.h> |
36 | ||
6df67667 MS |
37 | /* This module implements "target record", also known as "process |
38 | record and replay". This target sits on top of a "normal" target | |
39 | (a target that "has execution"), and provides a record and replay | |
40 | functionality, including reverse debugging. | |
41 | ||
42 | Target record has two modes: recording, and replaying. | |
43 | ||
44 | In record mode, we intercept the to_resume and to_wait methods. | |
45 | Whenever gdb resumes the target, we run the target in single step | |
46 | mode, and we build up an execution log in which, for each executed | |
47 | instruction, we record all changes in memory and register state. | |
48 | This is invisible to the user, to whom it just looks like an | |
49 | ordinary debugging session (except for performance degredation). | |
50 | ||
51 | In replay mode, instead of actually letting the inferior run as a | |
52 | process, we simulate its execution by playing back the recorded | |
53 | execution log. For each instruction in the log, we simulate the | |
54 | instruction's side effects by duplicating the changes that it would | |
55 | have made on memory and registers. */ | |
56 | ||
69d05d38 HZ |
57 | #define DEFAULT_RECORD_INSN_MAX_NUM 200000 |
58 | ||
59 | #define RECORD_IS_REPLAY \ | |
60 | (record_list->next || execution_direction == EXEC_REVERSE) | |
61 | ||
0156b218 MS |
62 | #define RECORD_FILE_MAGIC netorder32(0x20091016) |
63 | ||
fda458ee | 64 | /* These are the core structs of the process record functionality. |
69d05d38 | 65 | |
fda458ee | 66 | A record_entry is a record of the value change of a register |
69d05d38 | 67 | ("record_reg") or a part of memory ("record_mem"). And each |
fda458ee MS |
68 | instruction must have a struct record_entry ("record_end") that |
69 | indicates that this is the last struct record_entry of this | |
70 | instruction. | |
69d05d38 | 71 | |
fda458ee MS |
72 | Each struct record_entry is linked to "record_list" by "prev" and |
73 | "next" pointers. */ | |
69d05d38 | 74 | |
69d05d38 HZ |
75 | struct record_mem_entry |
76 | { | |
77 | CORE_ADDR addr; | |
78 | int len; | |
afd0cd3f MS |
79 | /* Set this flag if target memory for this entry |
80 | can no longer be accessed. */ | |
81 | int mem_entry_not_accessible; | |
44389f9b MS |
82 | union |
83 | { | |
84 | gdb_byte *ptr; | |
85 | gdb_byte buf[sizeof (gdb_byte *)]; | |
86 | } u; | |
87 | }; | |
88 | ||
89 | struct record_reg_entry | |
90 | { | |
91 | unsigned short num; | |
92 | unsigned short len; | |
93 | union | |
94 | { | |
95 | gdb_byte *ptr; | |
96 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
97 | } u; | |
69d05d38 HZ |
98 | }; |
99 | ||
8b739a96 HZ |
100 | struct record_end_entry |
101 | { | |
102 | enum target_signal sigval; | |
b54295a7 | 103 | ULONGEST insn_num; |
8b739a96 HZ |
104 | }; |
105 | ||
69d05d38 HZ |
106 | enum record_type |
107 | { | |
108 | record_end = 0, | |
109 | record_reg, | |
110 | record_mem | |
111 | }; | |
112 | ||
6df67667 MS |
113 | /* This is the data structure that makes up the execution log. |
114 | ||
115 | The execution log consists of a single linked list of entries | |
116 | of type "struct record_entry". It is doubly linked so that it | |
117 | can be traversed in either direction. | |
118 | ||
119 | The start of the list is anchored by a struct called | |
120 | "record_first". The pointer "record_list" either points to the | |
121 | last entry that was added to the list (in record mode), or to the | |
122 | next entry in the list that will be executed (in replay mode). | |
123 | ||
124 | Each list element (struct record_entry), in addition to next and | |
125 | prev pointers, consists of a union of three entry types: mem, reg, | |
126 | and end. A field called "type" determines which entry type is | |
127 | represented by a given list element. | |
128 | ||
129 | Each instruction that is added to the execution log is represented | |
130 | by a variable number of list elements ('entries'). The instruction | |
131 | will have one "reg" entry for each register that is changed by | |
132 | executing the instruction (including the PC in every case). It | |
133 | will also have one "mem" entry for each memory change. Finally, | |
134 | each instruction will have an "end" entry that separates it from | |
135 | the changes associated with the next instruction. */ | |
136 | ||
69d05d38 HZ |
137 | struct record_entry |
138 | { | |
139 | struct record_entry *prev; | |
140 | struct record_entry *next; | |
141 | enum record_type type; | |
142 | union | |
143 | { | |
144 | /* reg */ | |
145 | struct record_reg_entry reg; | |
146 | /* mem */ | |
147 | struct record_mem_entry mem; | |
8b739a96 HZ |
148 | /* end */ |
149 | struct record_end_entry end; | |
69d05d38 HZ |
150 | } u; |
151 | }; | |
152 | ||
153 | /* This is the debug switch for process record. */ | |
154 | int record_debug = 0; | |
155 | ||
27699eea MS |
156 | struct record_core_buf_entry |
157 | { | |
158 | struct record_core_buf_entry *prev; | |
159 | struct target_section *p; | |
160 | bfd_byte *buf; | |
161 | }; | |
162 | ||
163 | /* Record buf with core target. */ | |
164 | static gdb_byte *record_core_regbuf = NULL; | |
165 | static struct target_section *record_core_start; | |
166 | static struct target_section *record_core_end; | |
167 | static struct record_core_buf_entry *record_core_buf_list = NULL; | |
168 | ||
6df67667 MS |
169 | /* The following variables are used for managing the linked list that |
170 | represents the execution log. | |
171 | ||
172 | record_first is the anchor that holds down the beginning of the list. | |
173 | ||
174 | record_list serves two functions: | |
175 | 1) In record mode, it anchors the end of the list. | |
176 | 2) In replay mode, it traverses the list and points to | |
177 | the next instruction that must be emulated. | |
178 | ||
179 | record_arch_list_head and record_arch_list_tail are used to manage | |
180 | a separate list, which is used to build up the change elements of | |
181 | the currently executing instruction during record mode. When this | |
182 | instruction has been completely annotated in the "arch list", it | |
183 | will be appended to the main execution log. */ | |
184 | ||
69d05d38 HZ |
185 | static struct record_entry record_first; |
186 | static struct record_entry *record_list = &record_first; | |
187 | static struct record_entry *record_arch_list_head = NULL; | |
188 | static struct record_entry *record_arch_list_tail = NULL; | |
189 | ||
190 | /* 1 ask user. 0 auto delete the last struct record_entry. */ | |
191 | static int record_stop_at_limit = 1; | |
b54295a7 | 192 | /* Maximum allowed number of insns in execution log. */ |
191e1813 | 193 | static unsigned int record_insn_max_num = DEFAULT_RECORD_INSN_MAX_NUM; |
b54295a7 | 194 | /* Actual count of insns presently in execution log. */ |
69d05d38 | 195 | static int record_insn_num = 0; |
b54295a7 MS |
196 | /* Count of insns logged so far (may be larger |
197 | than count of insns presently in execution log). */ | |
198 | static ULONGEST record_insn_count; | |
69d05d38 HZ |
199 | |
200 | /* The target_ops of process record. */ | |
201 | static struct target_ops record_ops; | |
27699eea | 202 | static struct target_ops record_core_ops; |
69d05d38 HZ |
203 | |
204 | /* The beneath function pointers. */ | |
205 | static struct target_ops *record_beneath_to_resume_ops; | |
206 | static void (*record_beneath_to_resume) (struct target_ops *, ptid_t, int, | |
207 | enum target_signal); | |
208 | static struct target_ops *record_beneath_to_wait_ops; | |
209 | static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t, | |
47608cb1 PA |
210 | struct target_waitstatus *, |
211 | int); | |
69d05d38 HZ |
212 | static struct target_ops *record_beneath_to_store_registers_ops; |
213 | static void (*record_beneath_to_store_registers) (struct target_ops *, | |
214 | struct regcache *, | |
215 | int regno); | |
216 | static struct target_ops *record_beneath_to_xfer_partial_ops; | |
217 | static LONGEST (*record_beneath_to_xfer_partial) (struct target_ops *ops, | |
218 | enum target_object object, | |
219 | const char *annex, | |
220 | gdb_byte *readbuf, | |
221 | const gdb_byte *writebuf, | |
222 | ULONGEST offset, | |
223 | LONGEST len); | |
a6d9a66e UW |
224 | static int (*record_beneath_to_insert_breakpoint) (struct gdbarch *, |
225 | struct bp_target_info *); | |
226 | static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *, | |
227 | struct bp_target_info *); | |
69d05d38 | 228 | |
61f75dd8 MS |
229 | /* Alloc and free functions for record_reg, record_mem, and record_end |
230 | entries. */ | |
231 | ||
232 | /* Alloc a record_reg record entry. */ | |
233 | ||
234 | static inline struct record_entry * | |
235 | record_reg_alloc (struct regcache *regcache, int regnum) | |
236 | { | |
237 | struct record_entry *rec; | |
238 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
239 | ||
240 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
241 | rec->type = record_reg; | |
242 | rec->u.reg.num = regnum; | |
44389f9b MS |
243 | rec->u.reg.len = register_size (gdbarch, regnum); |
244 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
245 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
61f75dd8 MS |
246 | |
247 | return rec; | |
248 | } | |
249 | ||
250 | /* Free a record_reg record entry. */ | |
251 | ||
252 | static inline void | |
253 | record_reg_release (struct record_entry *rec) | |
254 | { | |
255 | gdb_assert (rec->type == record_reg); | |
44389f9b MS |
256 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
257 | xfree (rec->u.reg.u.ptr); | |
61f75dd8 MS |
258 | xfree (rec); |
259 | } | |
260 | ||
261 | /* Alloc a record_mem record entry. */ | |
262 | ||
263 | static inline struct record_entry * | |
264 | record_mem_alloc (CORE_ADDR addr, int len) | |
265 | { | |
266 | struct record_entry *rec; | |
267 | ||
268 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
269 | rec->type = record_mem; | |
270 | rec->u.mem.addr = addr; | |
271 | rec->u.mem.len = len; | |
44389f9b MS |
272 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
273 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
61f75dd8 MS |
274 | |
275 | return rec; | |
276 | } | |
277 | ||
278 | /* Free a record_mem record entry. */ | |
279 | ||
280 | static inline void | |
281 | record_mem_release (struct record_entry *rec) | |
282 | { | |
283 | gdb_assert (rec->type == record_mem); | |
44389f9b MS |
284 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
285 | xfree (rec->u.mem.u.ptr); | |
61f75dd8 MS |
286 | xfree (rec); |
287 | } | |
288 | ||
289 | /* Alloc a record_end record entry. */ | |
290 | ||
291 | static inline struct record_entry * | |
292 | record_end_alloc (void) | |
293 | { | |
294 | struct record_entry *rec; | |
295 | ||
296 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
297 | rec->type = record_end; | |
298 | ||
299 | return rec; | |
300 | } | |
301 | ||
302 | /* Free a record_end record entry. */ | |
303 | ||
304 | static inline void | |
305 | record_end_release (struct record_entry *rec) | |
306 | { | |
307 | xfree (rec); | |
308 | } | |
309 | ||
310 | /* Free one record entry, any type. | |
311 | Return entry->type, in case caller wants to know. */ | |
312 | ||
313 | static inline enum record_type | |
314 | record_entry_release (struct record_entry *rec) | |
315 | { | |
316 | enum record_type type = rec->type; | |
317 | ||
318 | switch (type) { | |
319 | case record_reg: | |
320 | record_reg_release (rec); | |
321 | break; | |
322 | case record_mem: | |
323 | record_mem_release (rec); | |
324 | break; | |
325 | case record_end: | |
326 | record_end_release (rec); | |
327 | break; | |
328 | } | |
329 | return type; | |
330 | } | |
331 | ||
332 | /* Free all record entries in list pointed to by REC. */ | |
333 | ||
69d05d38 HZ |
334 | static void |
335 | record_list_release (struct record_entry *rec) | |
336 | { | |
69d05d38 HZ |
337 | if (!rec) |
338 | return; | |
339 | ||
340 | while (rec->next) | |
61f75dd8 | 341 | rec = rec->next; |
69d05d38 HZ |
342 | |
343 | while (rec->prev) | |
344 | { | |
69d05d38 | 345 | rec = rec->prev; |
61f75dd8 | 346 | record_entry_release (rec->next); |
69d05d38 HZ |
347 | } |
348 | ||
61f75dd8 MS |
349 | if (rec == &record_first) |
350 | { | |
351 | record_insn_num = 0; | |
352 | record_first.next = NULL; | |
353 | } | |
354 | else | |
355 | record_entry_release (rec); | |
69d05d38 HZ |
356 | } |
357 | ||
61f75dd8 MS |
358 | /* Free all record entries forward of the given list position. */ |
359 | ||
69d05d38 | 360 | static void |
61f75dd8 | 361 | record_list_release_following (struct record_entry *rec) |
69d05d38 | 362 | { |
69d05d38 | 363 | struct record_entry *tmp = rec->next; |
61f75dd8 | 364 | |
69d05d38 HZ |
365 | rec->next = NULL; |
366 | while (tmp) | |
367 | { | |
368 | rec = tmp->next; | |
61f75dd8 | 369 | if (record_entry_release (tmp) == record_end) |
b54295a7 MS |
370 | { |
371 | record_insn_num--; | |
372 | record_insn_count--; | |
373 | } | |
69d05d38 HZ |
374 | tmp = rec; |
375 | } | |
376 | } | |
377 | ||
265aad34 MS |
378 | /* Delete the first instruction from the beginning of the log, to make |
379 | room for adding a new instruction at the end of the log. | |
380 | ||
381 | Note -- this function does not modify record_insn_num. */ | |
382 | ||
69d05d38 HZ |
383 | static void |
384 | record_list_release_first (void) | |
385 | { | |
61f75dd8 | 386 | struct record_entry *tmp; |
69d05d38 HZ |
387 | |
388 | if (!record_first.next) | |
389 | return; | |
390 | ||
61f75dd8 | 391 | /* Loop until a record_end. */ |
69d05d38 HZ |
392 | while (1) |
393 | { | |
61f75dd8 | 394 | /* Cut record_first.next out of the linked list. */ |
69d05d38 HZ |
395 | tmp = record_first.next; |
396 | record_first.next = tmp->next; | |
61f75dd8 MS |
397 | tmp->next->prev = &record_first; |
398 | ||
399 | /* tmp is now isolated, and can be deleted. */ | |
400 | if (record_entry_release (tmp) == record_end) | |
b54295a7 | 401 | break; /* End loop at first record_end. */ |
69d05d38 HZ |
402 | |
403 | if (!record_first.next) | |
404 | { | |
405 | gdb_assert (record_insn_num == 1); | |
61f75dd8 | 406 | break; /* End loop when list is empty. */ |
69d05d38 | 407 | } |
69d05d38 | 408 | } |
69d05d38 HZ |
409 | } |
410 | ||
411 | /* Add a struct record_entry to record_arch_list. */ | |
412 | ||
413 | static void | |
414 | record_arch_list_add (struct record_entry *rec) | |
415 | { | |
416 | if (record_debug > 1) | |
417 | fprintf_unfiltered (gdb_stdlog, | |
418 | "Process record: record_arch_list_add %s.\n", | |
419 | host_address_to_string (rec)); | |
420 | ||
421 | if (record_arch_list_tail) | |
422 | { | |
423 | record_arch_list_tail->next = rec; | |
424 | rec->prev = record_arch_list_tail; | |
425 | record_arch_list_tail = rec; | |
426 | } | |
427 | else | |
428 | { | |
429 | record_arch_list_head = rec; | |
430 | record_arch_list_tail = rec; | |
431 | } | |
432 | } | |
433 | ||
44389f9b MS |
434 | /* Return the value storage location of a record entry. */ |
435 | static inline gdb_byte * | |
436 | record_get_loc (struct record_entry *rec) | |
437 | { | |
438 | switch (rec->type) { | |
439 | case record_mem: | |
440 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
441 | return rec->u.mem.u.ptr; | |
442 | else | |
443 | return rec->u.mem.u.buf; | |
444 | case record_reg: | |
445 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
446 | return rec->u.reg.u.ptr; | |
447 | else | |
448 | return rec->u.reg.u.buf; | |
449 | case record_end: | |
450 | default: | |
451 | gdb_assert (0); | |
452 | return NULL; | |
453 | } | |
454 | } | |
455 | ||
456 | /* Record the value of a register NUM to record_arch_list. */ | |
69d05d38 HZ |
457 | |
458 | int | |
61f75dd8 | 459 | record_arch_list_add_reg (struct regcache *regcache, int regnum) |
69d05d38 HZ |
460 | { |
461 | struct record_entry *rec; | |
462 | ||
463 | if (record_debug > 1) | |
464 | fprintf_unfiltered (gdb_stdlog, | |
465 | "Process record: add register num = %d to " | |
466 | "record list.\n", | |
61f75dd8 | 467 | regnum); |
69d05d38 | 468 | |
61f75dd8 | 469 | rec = record_reg_alloc (regcache, regnum); |
69d05d38 | 470 | |
44389f9b | 471 | regcache_raw_read (regcache, regnum, record_get_loc (rec)); |
69d05d38 HZ |
472 | |
473 | record_arch_list_add (rec); | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
478 | /* Record the value of a region of memory whose address is ADDR and | |
479 | length is LEN to record_arch_list. */ | |
480 | ||
481 | int | |
482 | record_arch_list_add_mem (CORE_ADDR addr, int len) | |
483 | { | |
484 | struct record_entry *rec; | |
485 | ||
486 | if (record_debug > 1) | |
487 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 | 488 | "Process record: add mem addr = %s len = %d to " |
69d05d38 | 489 | "record list.\n", |
5af949e3 | 490 | paddress (target_gdbarch, addr), len); |
69d05d38 | 491 | |
61f75dd8 | 492 | if (!addr) /* FIXME: Why? Some arch must permit it... */ |
69d05d38 HZ |
493 | return 0; |
494 | ||
61f75dd8 | 495 | rec = record_mem_alloc (addr, len); |
69d05d38 | 496 | |
44389f9b | 497 | if (target_read_memory (addr, record_get_loc (rec), len)) |
69d05d38 HZ |
498 | { |
499 | if (record_debug) | |
500 | fprintf_unfiltered (gdb_stdlog, | |
501 | "Process record: error reading memory at " | |
5af949e3 UW |
502 | "addr = %s len = %d.\n", |
503 | paddress (target_gdbarch, addr), len); | |
61f75dd8 | 504 | record_mem_release (rec); |
69d05d38 HZ |
505 | return -1; |
506 | } | |
507 | ||
508 | record_arch_list_add (rec); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | /* Add a record_end type struct record_entry to record_arch_list. */ | |
514 | ||
515 | int | |
516 | record_arch_list_add_end (void) | |
517 | { | |
518 | struct record_entry *rec; | |
519 | ||
520 | if (record_debug > 1) | |
521 | fprintf_unfiltered (gdb_stdlog, | |
522 | "Process record: add end to arch list.\n"); | |
523 | ||
61f75dd8 | 524 | rec = record_end_alloc (); |
8b739a96 | 525 | rec->u.end.sigval = TARGET_SIGNAL_0; |
b54295a7 | 526 | rec->u.end.insn_num = ++record_insn_count; |
69d05d38 HZ |
527 | |
528 | record_arch_list_add (rec); | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | static void | |
534 | record_check_insn_num (int set_terminal) | |
535 | { | |
536 | if (record_insn_max_num) | |
537 | { | |
538 | gdb_assert (record_insn_num <= record_insn_max_num); | |
539 | if (record_insn_num == record_insn_max_num) | |
540 | { | |
541 | /* Ask user what to do. */ | |
542 | if (record_stop_at_limit) | |
543 | { | |
544 | int q; | |
545 | if (set_terminal) | |
546 | target_terminal_ours (); | |
547 | q = yquery (_("Do you want to auto delete previous execution " | |
548 | "log entries when record/replay buffer becomes " | |
549 | "full (record stop-at-limit)?")); | |
550 | if (set_terminal) | |
551 | target_terminal_inferior (); | |
552 | if (q) | |
553 | record_stop_at_limit = 0; | |
554 | else | |
0156b218 | 555 | error (_("Process record: stopped by user.")); |
69d05d38 HZ |
556 | } |
557 | } | |
558 | } | |
559 | } | |
560 | ||
0156b218 MS |
561 | static void |
562 | record_arch_list_cleanups (void *ignore) | |
563 | { | |
564 | record_list_release (record_arch_list_tail); | |
565 | } | |
566 | ||
69d05d38 HZ |
567 | /* Before inferior step (when GDB record the running message, inferior |
568 | only can step), GDB will call this function to record the values to | |
569 | record_list. This function will call gdbarch_process_record to | |
570 | record the running message of inferior and set them to | |
571 | record_arch_list, and add it to record_list. */ | |
572 | ||
8b739a96 HZ |
573 | struct record_message_args { |
574 | struct regcache *regcache; | |
575 | enum target_signal signal; | |
576 | }; | |
577 | ||
69d05d38 HZ |
578 | static int |
579 | record_message (void *args) | |
580 | { | |
581 | int ret; | |
8b739a96 HZ |
582 | struct record_message_args *myargs = args; |
583 | struct gdbarch *gdbarch = get_regcache_arch (myargs->regcache); | |
0156b218 | 584 | struct cleanup *old_cleanups = make_cleanup (record_arch_list_cleanups, 0); |
69d05d38 HZ |
585 | |
586 | record_arch_list_head = NULL; | |
587 | record_arch_list_tail = NULL; | |
588 | ||
589 | /* Check record_insn_num. */ | |
590 | record_check_insn_num (1); | |
591 | ||
8b739a96 HZ |
592 | /* If gdb sends a signal value to target_resume, |
593 | save it in the 'end' field of the previous instruction. | |
594 | ||
595 | Maybe process record should record what really happened, | |
596 | rather than what gdb pretends has happened. | |
597 | ||
598 | So if Linux delivered the signal to the child process during | |
599 | the record mode, we will record it and deliver it again in | |
600 | the replay mode. | |
601 | ||
602 | If user says "ignore this signal" during the record mode, then | |
603 | it will be ignored again during the replay mode (no matter if | |
604 | the user says something different, like "deliver this signal" | |
605 | during the replay mode). | |
606 | ||
607 | User should understand that nothing he does during the replay | |
608 | mode will change the behavior of the child. If he tries, | |
609 | then that is a user error. | |
610 | ||
611 | But we should still deliver the signal to gdb during the replay, | |
612 | if we delivered it during the recording. Therefore we should | |
613 | record the signal during record_wait, not record_resume. */ | |
614 | if (record_list != &record_first) /* FIXME better way to check */ | |
615 | { | |
616 | gdb_assert (record_list->type == record_end); | |
617 | record_list->u.end.sigval = myargs->signal; | |
618 | } | |
619 | ||
620 | if (myargs->signal == TARGET_SIGNAL_0 | |
621 | || !gdbarch_process_record_signal_p (gdbarch)) | |
622 | ret = gdbarch_process_record (gdbarch, | |
623 | myargs->regcache, | |
624 | regcache_read_pc (myargs->regcache)); | |
625 | else | |
626 | ret = gdbarch_process_record_signal (gdbarch, | |
627 | myargs->regcache, | |
628 | myargs->signal); | |
629 | ||
69d05d38 HZ |
630 | if (ret > 0) |
631 | error (_("Process record: inferior program stopped.")); | |
632 | if (ret < 0) | |
633 | error (_("Process record: failed to record execution log.")); | |
634 | ||
635 | discard_cleanups (old_cleanups); | |
636 | ||
637 | record_list->next = record_arch_list_head; | |
638 | record_arch_list_head->prev = record_list; | |
639 | record_list = record_arch_list_tail; | |
640 | ||
641 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
642 | record_list_release_first (); | |
643 | else | |
644 | record_insn_num++; | |
645 | ||
646 | return 1; | |
647 | } | |
648 | ||
649 | static int | |
8b739a96 HZ |
650 | do_record_message (struct regcache *regcache, |
651 | enum target_signal signal) | |
69d05d38 | 652 | { |
8b739a96 HZ |
653 | struct record_message_args args; |
654 | ||
655 | args.regcache = regcache; | |
656 | args.signal = signal; | |
657 | return catch_errors (record_message, &args, NULL, RETURN_MASK_ALL); | |
69d05d38 HZ |
658 | } |
659 | ||
660 | /* Set to 1 if record_store_registers and record_xfer_partial | |
661 | doesn't need record. */ | |
662 | ||
663 | static int record_gdb_operation_disable = 0; | |
664 | ||
665 | struct cleanup * | |
666 | record_gdb_operation_disable_set (void) | |
667 | { | |
668 | struct cleanup *old_cleanups = NULL; | |
669 | ||
670 | old_cleanups = | |
671 | make_cleanup_restore_integer (&record_gdb_operation_disable); | |
672 | record_gdb_operation_disable = 1; | |
673 | ||
674 | return old_cleanups; | |
675 | } | |
676 | ||
90ca0479 MS |
677 | /* Execute one instruction from the record log. Each instruction in |
678 | the log will be represented by an arbitrary sequence of register | |
679 | entries and memory entries, followed by an 'end' entry. */ | |
680 | ||
681 | static inline void | |
682 | record_exec_insn (struct regcache *regcache, struct gdbarch *gdbarch, | |
683 | struct record_entry *entry) | |
684 | { | |
685 | switch (entry->type) | |
686 | { | |
687 | case record_reg: /* reg */ | |
688 | { | |
689 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
690 | ||
691 | if (record_debug > 1) | |
692 | fprintf_unfiltered (gdb_stdlog, | |
693 | "Process record: record_reg %s to " | |
694 | "inferior num = %d.\n", | |
695 | host_address_to_string (entry), | |
696 | entry->u.reg.num); | |
697 | ||
698 | regcache_cooked_read (regcache, entry->u.reg.num, reg); | |
699 | regcache_cooked_write (regcache, entry->u.reg.num, | |
700 | record_get_loc (entry)); | |
701 | memcpy (record_get_loc (entry), reg, entry->u.reg.len); | |
702 | } | |
703 | break; | |
704 | ||
705 | case record_mem: /* mem */ | |
706 | { | |
707 | /* Nothing to do if the entry is flagged not_accessible. */ | |
708 | if (!entry->u.mem.mem_entry_not_accessible) | |
709 | { | |
710 | gdb_byte *mem = alloca (entry->u.mem.len); | |
711 | ||
712 | if (record_debug > 1) | |
713 | fprintf_unfiltered (gdb_stdlog, | |
714 | "Process record: record_mem %s to " | |
715 | "inferior addr = %s len = %d.\n", | |
716 | host_address_to_string (entry), | |
717 | paddress (gdbarch, entry->u.mem.addr), | |
718 | entry->u.mem.len); | |
719 | ||
720 | if (target_read_memory (entry->u.mem.addr, mem, entry->u.mem.len)) | |
721 | { | |
722 | entry->u.mem.mem_entry_not_accessible = 1; | |
723 | if (record_debug) | |
0156b218 MS |
724 | warning ("Process record: error reading memory at " |
725 | "addr = %s len = %d.", | |
90ca0479 MS |
726 | paddress (gdbarch, entry->u.mem.addr), |
727 | entry->u.mem.len); | |
728 | } | |
729 | else | |
730 | { | |
731 | if (target_write_memory (entry->u.mem.addr, | |
732 | record_get_loc (entry), | |
733 | entry->u.mem.len)) | |
734 | { | |
735 | entry->u.mem.mem_entry_not_accessible = 1; | |
736 | if (record_debug) | |
0156b218 MS |
737 | warning ("Process record: error writing memory at " |
738 | "addr = %s len = %d.", | |
90ca0479 MS |
739 | paddress (gdbarch, entry->u.mem.addr), |
740 | entry->u.mem.len); | |
741 | } | |
742 | else | |
743 | memcpy (record_get_loc (entry), mem, entry->u.mem.len); | |
744 | } | |
745 | } | |
746 | } | |
747 | break; | |
748 | } | |
749 | } | |
750 | ||
27699eea MS |
751 | static struct target_ops *tmp_to_resume_ops; |
752 | static void (*tmp_to_resume) (struct target_ops *, ptid_t, int, | |
753 | enum target_signal); | |
754 | static struct target_ops *tmp_to_wait_ops; | |
755 | static ptid_t (*tmp_to_wait) (struct target_ops *, ptid_t, | |
756 | struct target_waitstatus *, | |
757 | int); | |
758 | static struct target_ops *tmp_to_store_registers_ops; | |
759 | static void (*tmp_to_store_registers) (struct target_ops *, | |
760 | struct regcache *, | |
761 | int regno); | |
762 | static struct target_ops *tmp_to_xfer_partial_ops; | |
763 | static LONGEST (*tmp_to_xfer_partial) (struct target_ops *ops, | |
764 | enum target_object object, | |
765 | const char *annex, | |
766 | gdb_byte *readbuf, | |
767 | const gdb_byte *writebuf, | |
768 | ULONGEST offset, | |
769 | LONGEST len); | |
770 | static int (*tmp_to_insert_breakpoint) (struct gdbarch *, | |
771 | struct bp_target_info *); | |
772 | static int (*tmp_to_remove_breakpoint) (struct gdbarch *, | |
773 | struct bp_target_info *); | |
774 | ||
0156b218 MS |
775 | static void record_restore (void); |
776 | ||
27699eea | 777 | /* Open the process record target. */ |
6df67667 | 778 | |
69d05d38 | 779 | static void |
27699eea MS |
780 | record_core_open_1 (char *name, int from_tty) |
781 | { | |
782 | struct regcache *regcache = get_current_regcache (); | |
783 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
784 | int i; | |
785 | ||
786 | /* Get record_core_regbuf. */ | |
787 | target_fetch_registers (regcache, -1); | |
788 | record_core_regbuf = xmalloc (MAX_REGISTER_SIZE * regnum); | |
789 | for (i = 0; i < regnum; i ++) | |
790 | regcache_raw_collect (regcache, i, | |
791 | record_core_regbuf + MAX_REGISTER_SIZE * i); | |
792 | ||
793 | /* Get record_core_start and record_core_end. */ | |
794 | if (build_section_table (core_bfd, &record_core_start, &record_core_end)) | |
795 | { | |
796 | xfree (record_core_regbuf); | |
797 | record_core_regbuf = NULL; | |
798 | error (_("\"%s\": Can't find sections: %s"), | |
799 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
800 | } | |
801 | ||
802 | push_target (&record_core_ops); | |
0156b218 | 803 | record_restore (); |
27699eea MS |
804 | } |
805 | ||
806 | /* "to_open" target method for 'live' processes. */ | |
807 | ||
808 | static void | |
809 | record_open_1 (char *name, int from_tty) | |
69d05d38 HZ |
810 | { |
811 | struct target_ops *t; | |
812 | ||
813 | if (record_debug) | |
814 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
815 | ||
816 | /* check exec */ | |
817 | if (!target_has_execution) | |
818 | error (_("Process record: the program is not being run.")); | |
819 | if (non_stop) | |
820 | error (_("Process record target can't debug inferior in non-stop mode " | |
821 | "(non-stop).")); | |
822 | if (target_async_permitted) | |
823 | error (_("Process record target can't debug inferior in asynchronous " | |
824 | "mode (target-async).")); | |
825 | ||
a97b0ac8 | 826 | if (!gdbarch_process_record_p (target_gdbarch)) |
69d05d38 HZ |
827 | error (_("Process record: the current architecture doesn't support " |
828 | "record function.")); | |
829 | ||
27699eea MS |
830 | if (!tmp_to_resume) |
831 | error (_("Could not find 'to_resume' method on the target stack.")); | |
832 | if (!tmp_to_wait) | |
833 | error (_("Could not find 'to_wait' method on the target stack.")); | |
834 | if (!tmp_to_store_registers) | |
835 | error (_("Could not find 'to_store_registers' method on the target stack.")); | |
836 | if (!tmp_to_insert_breakpoint) | |
837 | error (_("Could not find 'to_insert_breakpoint' method on the target stack.")); | |
838 | if (!tmp_to_remove_breakpoint) | |
839 | error (_("Could not find 'to_remove_breakpoint' method on the target stack.")); | |
840 | ||
841 | push_target (&record_ops); | |
842 | } | |
843 | ||
844 | /* "to_open" target method. Open the process record target. */ | |
845 | ||
846 | static void | |
847 | record_open (char *name, int from_tty) | |
848 | { | |
849 | struct target_ops *t; | |
850 | ||
851 | if (record_debug) | |
852 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
853 | ||
69d05d38 HZ |
854 | /* Check if record target is already running. */ |
855 | if (current_target.to_stratum == record_stratum) | |
5d40bb85 HZ |
856 | error (_("Process record target already running. Use \"record stop\" to " |
857 | "stop record target first.")); | |
69d05d38 | 858 | |
27699eea MS |
859 | /* Reset the tmp beneath pointers. */ |
860 | tmp_to_resume_ops = NULL; | |
861 | tmp_to_resume = NULL; | |
862 | tmp_to_wait_ops = NULL; | |
863 | tmp_to_wait = NULL; | |
864 | tmp_to_store_registers_ops = NULL; | |
865 | tmp_to_store_registers = NULL; | |
866 | tmp_to_xfer_partial_ops = NULL; | |
867 | tmp_to_xfer_partial = NULL; | |
868 | tmp_to_insert_breakpoint = NULL; | |
869 | tmp_to_remove_breakpoint = NULL; | |
69d05d38 HZ |
870 | |
871 | /* Set the beneath function pointers. */ | |
872 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
873 | { | |
27699eea | 874 | if (!tmp_to_resume) |
69d05d38 | 875 | { |
27699eea MS |
876 | tmp_to_resume = t->to_resume; |
877 | tmp_to_resume_ops = t; | |
69d05d38 | 878 | } |
27699eea | 879 | if (!tmp_to_wait) |
69d05d38 | 880 | { |
27699eea MS |
881 | tmp_to_wait = t->to_wait; |
882 | tmp_to_wait_ops = t; | |
69d05d38 | 883 | } |
27699eea | 884 | if (!tmp_to_store_registers) |
69d05d38 | 885 | { |
27699eea MS |
886 | tmp_to_store_registers = t->to_store_registers; |
887 | tmp_to_store_registers_ops = t; | |
69d05d38 | 888 | } |
27699eea | 889 | if (!tmp_to_xfer_partial) |
69d05d38 | 890 | { |
27699eea MS |
891 | tmp_to_xfer_partial = t->to_xfer_partial; |
892 | tmp_to_xfer_partial_ops = t; | |
69d05d38 | 893 | } |
27699eea MS |
894 | if (!tmp_to_insert_breakpoint) |
895 | tmp_to_insert_breakpoint = t->to_insert_breakpoint; | |
896 | if (!tmp_to_remove_breakpoint) | |
897 | tmp_to_remove_breakpoint = t->to_remove_breakpoint; | |
69d05d38 | 898 | } |
27699eea MS |
899 | if (!tmp_to_xfer_partial) |
900 | error (_("Could not find 'to_xfer_partial' method on the target stack.")); | |
69d05d38 HZ |
901 | |
902 | /* Reset */ | |
903 | record_insn_num = 0; | |
b54295a7 | 904 | record_insn_count = 0; |
69d05d38 HZ |
905 | record_list = &record_first; |
906 | record_list->next = NULL; | |
27699eea MS |
907 | |
908 | /* Set the tmp beneath pointers to beneath pointers. */ | |
909 | record_beneath_to_resume_ops = tmp_to_resume_ops; | |
910 | record_beneath_to_resume = tmp_to_resume; | |
911 | record_beneath_to_wait_ops = tmp_to_wait_ops; | |
912 | record_beneath_to_wait = tmp_to_wait; | |
913 | record_beneath_to_store_registers_ops = tmp_to_store_registers_ops; | |
914 | record_beneath_to_store_registers = tmp_to_store_registers; | |
915 | record_beneath_to_xfer_partial_ops = tmp_to_xfer_partial_ops; | |
916 | record_beneath_to_xfer_partial = tmp_to_xfer_partial; | |
917 | record_beneath_to_insert_breakpoint = tmp_to_insert_breakpoint; | |
918 | record_beneath_to_remove_breakpoint = tmp_to_remove_breakpoint; | |
919 | ||
920 | if (current_target.to_stratum == core_stratum) | |
921 | record_core_open_1 (name, from_tty); | |
922 | else | |
923 | record_open_1 (name, from_tty); | |
69d05d38 HZ |
924 | } |
925 | ||
6df67667 MS |
926 | /* "to_close" target method. Close the process record target. */ |
927 | ||
69d05d38 HZ |
928 | static void |
929 | record_close (int quitting) | |
930 | { | |
27699eea MS |
931 | struct record_core_buf_entry *entry; |
932 | ||
69d05d38 HZ |
933 | if (record_debug) |
934 | fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n"); | |
935 | ||
936 | record_list_release (record_list); | |
27699eea MS |
937 | |
938 | /* Release record_core_regbuf. */ | |
939 | if (record_core_regbuf) | |
940 | { | |
941 | xfree (record_core_regbuf); | |
942 | record_core_regbuf = NULL; | |
943 | } | |
944 | ||
945 | /* Release record_core_buf_list. */ | |
946 | if (record_core_buf_list) | |
947 | { | |
948 | for (entry = record_core_buf_list->prev; entry; entry = entry->prev) | |
949 | { | |
950 | xfree (record_core_buf_list); | |
951 | record_core_buf_list = entry; | |
952 | } | |
953 | record_core_buf_list = NULL; | |
954 | } | |
69d05d38 HZ |
955 | } |
956 | ||
957 | static int record_resume_step = 0; | |
69d05d38 HZ |
958 | static int record_resume_error; |
959 | ||
6df67667 MS |
960 | /* "to_resume" target method. Resume the process record target. */ |
961 | ||
69d05d38 HZ |
962 | static void |
963 | record_resume (struct target_ops *ops, ptid_t ptid, int step, | |
8b739a96 | 964 | enum target_signal signal) |
69d05d38 HZ |
965 | { |
966 | record_resume_step = step; | |
69d05d38 HZ |
967 | |
968 | if (!RECORD_IS_REPLAY) | |
969 | { | |
8b739a96 | 970 | if (do_record_message (get_current_regcache (), signal)) |
69d05d38 HZ |
971 | { |
972 | record_resume_error = 0; | |
973 | } | |
974 | else | |
975 | { | |
976 | record_resume_error = 1; | |
977 | return; | |
978 | } | |
979 | record_beneath_to_resume (record_beneath_to_resume_ops, ptid, 1, | |
8b739a96 | 980 | signal); |
69d05d38 HZ |
981 | } |
982 | } | |
983 | ||
984 | static int record_get_sig = 0; | |
985 | ||
6df67667 MS |
986 | /* SIGINT signal handler, registered by "to_wait" method. */ |
987 | ||
69d05d38 HZ |
988 | static void |
989 | record_sig_handler (int signo) | |
990 | { | |
991 | if (record_debug) | |
992 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
993 | ||
994 | /* It will break the running inferior in replay mode. */ | |
995 | record_resume_step = 1; | |
996 | ||
997 | /* It will let record_wait set inferior status to get the signal | |
998 | SIGINT. */ | |
999 | record_get_sig = 1; | |
1000 | } | |
1001 | ||
1002 | static void | |
1003 | record_wait_cleanups (void *ignore) | |
1004 | { | |
1005 | if (execution_direction == EXEC_REVERSE) | |
1006 | { | |
1007 | if (record_list->next) | |
1008 | record_list = record_list->next; | |
1009 | } | |
1010 | else | |
1011 | record_list = record_list->prev; | |
1012 | } | |
1013 | ||
6df67667 MS |
1014 | /* "to_wait" target method for process record target. |
1015 | ||
1016 | In record mode, the target is always run in singlestep mode | |
1017 | (even when gdb says to continue). The to_wait method intercepts | |
1018 | the stop events and determines which ones are to be passed on to | |
1019 | gdb. Most stop events are just singlestep events that gdb is not | |
1020 | to know about, so the to_wait method just records them and keeps | |
1021 | singlestepping. | |
1022 | ||
1023 | In replay mode, this function emulates the recorded execution log, | |
1024 | one instruction at a time (forward or backward), and determines | |
1025 | where to stop. */ | |
69d05d38 HZ |
1026 | |
1027 | static ptid_t | |
1028 | record_wait (struct target_ops *ops, | |
47608cb1 PA |
1029 | ptid_t ptid, struct target_waitstatus *status, |
1030 | int options) | |
69d05d38 HZ |
1031 | { |
1032 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
1033 | ||
1034 | if (record_debug) | |
1035 | fprintf_unfiltered (gdb_stdlog, | |
1036 | "Process record: record_wait " | |
1037 | "record_resume_step = %d\n", | |
1038 | record_resume_step); | |
1039 | ||
27699eea | 1040 | if (!RECORD_IS_REPLAY && ops != &record_core_ops) |
69d05d38 HZ |
1041 | { |
1042 | if (record_resume_error) | |
1043 | { | |
1044 | /* If record_resume get error, return directly. */ | |
1045 | status->kind = TARGET_WAITKIND_STOPPED; | |
1046 | status->value.sig = TARGET_SIGNAL_ABRT; | |
1047 | return inferior_ptid; | |
1048 | } | |
1049 | ||
1050 | if (record_resume_step) | |
1051 | { | |
1052 | /* This is a single step. */ | |
1053 | return record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 1054 | ptid, status, options); |
69d05d38 HZ |
1055 | } |
1056 | else | |
1057 | { | |
1058 | /* This is not a single step. */ | |
1059 | ptid_t ret; | |
1060 | CORE_ADDR tmp_pc; | |
1061 | ||
1062 | while (1) | |
1063 | { | |
1064 | ret = record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 1065 | ptid, status, options); |
69d05d38 | 1066 | |
8b739a96 | 1067 | /* Is this a SIGTRAP? */ |
69d05d38 HZ |
1068 | if (status->kind == TARGET_WAITKIND_STOPPED |
1069 | && status->value.sig == TARGET_SIGNAL_TRAP) | |
1070 | { | |
6c95b8df PA |
1071 | struct regcache *regcache; |
1072 | ||
8b739a96 | 1073 | /* Yes -- check if there is a breakpoint. */ |
69d05d38 | 1074 | registers_changed (); |
6c95b8df PA |
1075 | regcache = get_current_regcache (); |
1076 | tmp_pc = regcache_read_pc (regcache); | |
1077 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), | |
1078 | tmp_pc)) | |
69d05d38 | 1079 | { |
8b739a96 | 1080 | /* There is a breakpoint. GDB will want to stop. */ |
6c95b8df PA |
1081 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
1082 | CORE_ADDR decr_pc_after_break | |
1083 | = gdbarch_decr_pc_after_break (gdbarch); | |
69d05d38 | 1084 | if (decr_pc_after_break) |
6c95b8df PA |
1085 | regcache_write_pc (regcache, |
1086 | tmp_pc + decr_pc_after_break); | |
69d05d38 HZ |
1087 | } |
1088 | else | |
1089 | { | |
8b739a96 HZ |
1090 | /* There is not a breakpoint, and gdb is not |
1091 | stepping, therefore gdb will not stop. | |
1092 | Therefore we will not return to gdb. | |
1093 | Record the insn and resume. */ | |
6c95b8df PA |
1094 | if (!do_record_message (regcache, TARGET_SIGNAL_0)) |
1095 | break; | |
1096 | ||
69d05d38 HZ |
1097 | record_beneath_to_resume (record_beneath_to_resume_ops, |
1098 | ptid, 1, | |
88fef440 | 1099 | TARGET_SIGNAL_0); |
69d05d38 HZ |
1100 | continue; |
1101 | } | |
1102 | } | |
1103 | ||
1104 | /* The inferior is broken by a breakpoint or a signal. */ | |
1105 | break; | |
1106 | } | |
1107 | ||
1108 | return ret; | |
1109 | } | |
1110 | } | |
1111 | else | |
1112 | { | |
1113 | struct regcache *regcache = get_current_regcache (); | |
5af949e3 | 1114 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
69d05d38 HZ |
1115 | int continue_flag = 1; |
1116 | int first_record_end = 1; | |
1117 | struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0); | |
1118 | CORE_ADDR tmp_pc; | |
1119 | ||
1120 | status->kind = TARGET_WAITKIND_STOPPED; | |
1121 | ||
1122 | /* Check breakpoint when forward execute. */ | |
1123 | if (execution_direction == EXEC_FORWARD) | |
1124 | { | |
1125 | tmp_pc = regcache_read_pc (regcache); | |
6c95b8df PA |
1126 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), |
1127 | tmp_pc)) | |
69d05d38 HZ |
1128 | { |
1129 | if (record_debug) | |
1130 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 UW |
1131 | "Process record: break at %s.\n", |
1132 | paddress (gdbarch, tmp_pc)); | |
1133 | if (gdbarch_decr_pc_after_break (gdbarch) | |
69d05d38 HZ |
1134 | && !record_resume_step) |
1135 | regcache_write_pc (regcache, | |
1136 | tmp_pc + | |
5af949e3 | 1137 | gdbarch_decr_pc_after_break (gdbarch)); |
69d05d38 HZ |
1138 | goto replay_out; |
1139 | } | |
1140 | } | |
1141 | ||
1142 | record_get_sig = 0; | |
1143 | signal (SIGINT, record_sig_handler); | |
1144 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
1145 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1146 | mode, because inferior will not executed. | |
1147 | Then set it to terminal_ours to make GDB get the signal. */ | |
1148 | target_terminal_ours (); | |
1149 | ||
1150 | /* In EXEC_FORWARD mode, record_list points to the tail of prev | |
1151 | instruction. */ | |
1152 | if (execution_direction == EXEC_FORWARD && record_list->next) | |
1153 | record_list = record_list->next; | |
1154 | ||
1155 | /* Loop over the record_list, looking for the next place to | |
1156 | stop. */ | |
1157 | do | |
1158 | { | |
1159 | /* Check for beginning and end of log. */ | |
1160 | if (execution_direction == EXEC_REVERSE | |
1161 | && record_list == &record_first) | |
1162 | { | |
1163 | /* Hit beginning of record log in reverse. */ | |
1164 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1165 | break; | |
1166 | } | |
1167 | if (execution_direction != EXEC_REVERSE && !record_list->next) | |
1168 | { | |
1169 | /* Hit end of record log going forward. */ | |
1170 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1171 | break; | |
1172 | } | |
1173 | ||
90ca0479 MS |
1174 | record_exec_insn (regcache, gdbarch, record_list); |
1175 | ||
1176 | if (record_list->type == record_end) | |
69d05d38 HZ |
1177 | { |
1178 | if (record_debug > 1) | |
1179 | fprintf_unfiltered (gdb_stdlog, | |
1180 | "Process record: record_end %s to " | |
1181 | "inferior.\n", | |
1182 | host_address_to_string (record_list)); | |
1183 | ||
1184 | if (first_record_end && execution_direction == EXEC_REVERSE) | |
1185 | { | |
1186 | /* When reverse excute, the first record_end is the part of | |
1187 | current instruction. */ | |
1188 | first_record_end = 0; | |
1189 | } | |
1190 | else | |
1191 | { | |
1192 | /* In EXEC_REVERSE mode, this is the record_end of prev | |
1193 | instruction. | |
1194 | In EXEC_FORWARD mode, this is the record_end of current | |
1195 | instruction. */ | |
1196 | /* step */ | |
1197 | if (record_resume_step) | |
1198 | { | |
1199 | if (record_debug > 1) | |
1200 | fprintf_unfiltered (gdb_stdlog, | |
1201 | "Process record: step.\n"); | |
1202 | continue_flag = 0; | |
1203 | } | |
1204 | ||
1205 | /* check breakpoint */ | |
1206 | tmp_pc = regcache_read_pc (regcache); | |
6c95b8df PA |
1207 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), |
1208 | tmp_pc)) | |
69d05d38 HZ |
1209 | { |
1210 | if (record_debug) | |
1211 | fprintf_unfiltered (gdb_stdlog, | |
1212 | "Process record: break " | |
5af949e3 UW |
1213 | "at %s.\n", |
1214 | paddress (gdbarch, tmp_pc)); | |
1215 | if (gdbarch_decr_pc_after_break (gdbarch) | |
69d05d38 HZ |
1216 | && execution_direction == EXEC_FORWARD |
1217 | && !record_resume_step) | |
1218 | regcache_write_pc (regcache, | |
1219 | tmp_pc + | |
5af949e3 | 1220 | gdbarch_decr_pc_after_break (gdbarch)); |
69d05d38 HZ |
1221 | continue_flag = 0; |
1222 | } | |
8b739a96 HZ |
1223 | /* Check target signal */ |
1224 | if (record_list->u.end.sigval != TARGET_SIGNAL_0) | |
1225 | /* FIXME: better way to check */ | |
1226 | continue_flag = 0; | |
69d05d38 HZ |
1227 | } |
1228 | } | |
1229 | ||
1230 | if (continue_flag) | |
1231 | { | |
1232 | if (execution_direction == EXEC_REVERSE) | |
1233 | { | |
1234 | if (record_list->prev) | |
1235 | record_list = record_list->prev; | |
1236 | } | |
1237 | else | |
1238 | { | |
1239 | if (record_list->next) | |
1240 | record_list = record_list->next; | |
1241 | } | |
1242 | } | |
1243 | } | |
1244 | while (continue_flag); | |
1245 | ||
1246 | signal (SIGINT, handle_sigint); | |
1247 | ||
1248 | replay_out: | |
1249 | if (record_get_sig) | |
1250 | status->value.sig = TARGET_SIGNAL_INT; | |
8b739a96 HZ |
1251 | else if (record_list->u.end.sigval != TARGET_SIGNAL_0) |
1252 | /* FIXME: better way to check */ | |
1253 | status->value.sig = record_list->u.end.sigval; | |
69d05d38 HZ |
1254 | else |
1255 | status->value.sig = TARGET_SIGNAL_TRAP; | |
1256 | ||
1257 | discard_cleanups (old_cleanups); | |
1258 | } | |
1259 | ||
1260 | do_cleanups (set_cleanups); | |
1261 | return inferior_ptid; | |
1262 | } | |
1263 | ||
6df67667 MS |
1264 | /* "to_disconnect" method for process record target. */ |
1265 | ||
69d05d38 HZ |
1266 | static void |
1267 | record_disconnect (struct target_ops *target, char *args, int from_tty) | |
1268 | { | |
1269 | if (record_debug) | |
1270 | fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n"); | |
1271 | ||
1272 | unpush_target (&record_ops); | |
1273 | target_disconnect (args, from_tty); | |
1274 | } | |
1275 | ||
6df67667 MS |
1276 | /* "to_detach" method for process record target. */ |
1277 | ||
69d05d38 HZ |
1278 | static void |
1279 | record_detach (struct target_ops *ops, char *args, int from_tty) | |
1280 | { | |
1281 | if (record_debug) | |
1282 | fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n"); | |
1283 | ||
1284 | unpush_target (&record_ops); | |
1285 | target_detach (args, from_tty); | |
1286 | } | |
1287 | ||
6df67667 MS |
1288 | /* "to_mourn_inferior" method for process record target. */ |
1289 | ||
69d05d38 HZ |
1290 | static void |
1291 | record_mourn_inferior (struct target_ops *ops) | |
1292 | { | |
1293 | if (record_debug) | |
1294 | fprintf_unfiltered (gdb_stdlog, "Process record: " | |
1295 | "record_mourn_inferior\n"); | |
1296 | ||
1297 | unpush_target (&record_ops); | |
1298 | target_mourn_inferior (); | |
1299 | } | |
1300 | ||
1301 | /* Close process record target before killing the inferior process. */ | |
1302 | ||
1303 | static void | |
1304 | record_kill (struct target_ops *ops) | |
1305 | { | |
1306 | if (record_debug) | |
1307 | fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n"); | |
1308 | ||
1309 | unpush_target (&record_ops); | |
1310 | target_kill (); | |
1311 | } | |
1312 | ||
1313 | /* Record registers change (by user or by GDB) to list as an instruction. */ | |
1314 | ||
1315 | static void | |
1316 | record_registers_change (struct regcache *regcache, int regnum) | |
1317 | { | |
1318 | /* Check record_insn_num. */ | |
1319 | record_check_insn_num (0); | |
1320 | ||
1321 | record_arch_list_head = NULL; | |
1322 | record_arch_list_tail = NULL; | |
1323 | ||
1324 | if (regnum < 0) | |
1325 | { | |
1326 | int i; | |
1327 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
1328 | { | |
1329 | if (record_arch_list_add_reg (regcache, i)) | |
1330 | { | |
1331 | record_list_release (record_arch_list_tail); | |
1332 | error (_("Process record: failed to record execution log.")); | |
1333 | } | |
1334 | } | |
1335 | } | |
1336 | else | |
1337 | { | |
1338 | if (record_arch_list_add_reg (regcache, regnum)) | |
1339 | { | |
1340 | record_list_release (record_arch_list_tail); | |
1341 | error (_("Process record: failed to record execution log.")); | |
1342 | } | |
1343 | } | |
1344 | if (record_arch_list_add_end ()) | |
1345 | { | |
1346 | record_list_release (record_arch_list_tail); | |
1347 | error (_("Process record: failed to record execution log.")); | |
1348 | } | |
1349 | record_list->next = record_arch_list_head; | |
1350 | record_arch_list_head->prev = record_list; | |
1351 | record_list = record_arch_list_tail; | |
1352 | ||
1353 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1354 | record_list_release_first (); | |
1355 | else | |
1356 | record_insn_num++; | |
1357 | } | |
1358 | ||
6df67667 MS |
1359 | /* "to_store_registers" method for process record target. */ |
1360 | ||
69d05d38 HZ |
1361 | static void |
1362 | record_store_registers (struct target_ops *ops, struct regcache *regcache, | |
1363 | int regno) | |
1364 | { | |
1365 | if (!record_gdb_operation_disable) | |
1366 | { | |
1367 | if (RECORD_IS_REPLAY) | |
1368 | { | |
1369 | int n; | |
69d05d38 HZ |
1370 | |
1371 | /* Let user choose if he wants to write register or not. */ | |
1372 | if (regno < 0) | |
1373 | n = | |
604ad007 JB |
1374 | query (_("Because GDB is in replay mode, changing the " |
1375 | "value of a register will make the execution " | |
1376 | "log unusable from this point onward. " | |
1377 | "Change all registers?")); | |
69d05d38 HZ |
1378 | else |
1379 | n = | |
604ad007 JB |
1380 | query (_("Because GDB is in replay mode, changing the value " |
1381 | "of a register will make the execution log unusable " | |
1382 | "from this point onward. Change register %s?"), | |
69d05d38 HZ |
1383 | gdbarch_register_name (get_regcache_arch (regcache), |
1384 | regno)); | |
1385 | ||
1386 | if (!n) | |
1387 | { | |
1388 | /* Invalidate the value of regcache that was set in function | |
1389 | "regcache_raw_write". */ | |
1390 | if (regno < 0) | |
1391 | { | |
1392 | int i; | |
1393 | for (i = 0; | |
1394 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1395 | i++) | |
1396 | regcache_invalidate (regcache, i); | |
1397 | } | |
1398 | else | |
1399 | regcache_invalidate (regcache, regno); | |
1400 | ||
1401 | error (_("Process record canceled the operation.")); | |
1402 | } | |
1403 | ||
1404 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1405 | record_list_release_following (record_list); |
69d05d38 HZ |
1406 | } |
1407 | ||
1408 | record_registers_change (regcache, regno); | |
1409 | } | |
1410 | record_beneath_to_store_registers (record_beneath_to_store_registers_ops, | |
1411 | regcache, regno); | |
1412 | } | |
1413 | ||
27699eea | 1414 | /* "to_xfer_partial" method. Behavior is conditional on RECORD_IS_REPLAY. |
69d05d38 HZ |
1415 | In replay mode, we cannot write memory unles we are willing to |
1416 | invalidate the record/replay log from this point forward. */ | |
1417 | ||
1418 | static LONGEST | |
1419 | record_xfer_partial (struct target_ops *ops, enum target_object object, | |
1420 | const char *annex, gdb_byte *readbuf, | |
1421 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
1422 | { | |
1423 | if (!record_gdb_operation_disable | |
1424 | && (object == TARGET_OBJECT_MEMORY | |
1425 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1426 | { | |
1427 | if (RECORD_IS_REPLAY) | |
1428 | { | |
1429 | /* Let user choose if he wants to write memory or not. */ | |
604ad007 JB |
1430 | if (!query (_("Because GDB is in replay mode, writing to memory " |
1431 | "will make the execution log unusable from this " | |
1432 | "point onward. Write memory at address %s?"), | |
5af949e3 | 1433 | paddress (target_gdbarch, offset))) |
9a9dc473 | 1434 | error (_("Process record canceled the operation.")); |
69d05d38 HZ |
1435 | |
1436 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1437 | record_list_release_following (record_list); |
69d05d38 HZ |
1438 | } |
1439 | ||
1440 | /* Check record_insn_num */ | |
1441 | record_check_insn_num (0); | |
1442 | ||
1443 | /* Record registers change to list as an instruction. */ | |
1444 | record_arch_list_head = NULL; | |
1445 | record_arch_list_tail = NULL; | |
1446 | if (record_arch_list_add_mem (offset, len)) | |
1447 | { | |
1448 | record_list_release (record_arch_list_tail); | |
1449 | if (record_debug) | |
1450 | fprintf_unfiltered (gdb_stdlog, | |
0156b218 MS |
1451 | "Process record: failed to record " |
1452 | "execution log."); | |
69d05d38 HZ |
1453 | return -1; |
1454 | } | |
1455 | if (record_arch_list_add_end ()) | |
1456 | { | |
1457 | record_list_release (record_arch_list_tail); | |
1458 | if (record_debug) | |
1459 | fprintf_unfiltered (gdb_stdlog, | |
0156b218 MS |
1460 | "Process record: failed to record " |
1461 | "execution log."); | |
69d05d38 HZ |
1462 | return -1; |
1463 | } | |
1464 | record_list->next = record_arch_list_head; | |
1465 | record_arch_list_head->prev = record_list; | |
1466 | record_list = record_arch_list_tail; | |
1467 | ||
1468 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1469 | record_list_release_first (); | |
1470 | else | |
1471 | record_insn_num++; | |
1472 | } | |
1473 | ||
1474 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
1475 | object, annex, readbuf, writebuf, | |
1476 | offset, len); | |
1477 | } | |
1478 | ||
1479 | /* Behavior is conditional on RECORD_IS_REPLAY. | |
1480 | We will not actually insert or remove breakpoints when replaying, | |
1481 | nor when recording. */ | |
1482 | ||
1483 | static int | |
a6d9a66e UW |
1484 | record_insert_breakpoint (struct gdbarch *gdbarch, |
1485 | struct bp_target_info *bp_tgt) | |
69d05d38 HZ |
1486 | { |
1487 | if (!RECORD_IS_REPLAY) | |
1488 | { | |
1489 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); | |
a6d9a66e | 1490 | int ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt); |
69d05d38 HZ |
1491 | |
1492 | do_cleanups (old_cleanups); | |
1493 | ||
1494 | return ret; | |
1495 | } | |
1496 | ||
1497 | return 0; | |
1498 | } | |
1499 | ||
6df67667 MS |
1500 | /* "to_remove_breakpoint" method for process record target. */ |
1501 | ||
69d05d38 | 1502 | static int |
a6d9a66e UW |
1503 | record_remove_breakpoint (struct gdbarch *gdbarch, |
1504 | struct bp_target_info *bp_tgt) | |
69d05d38 HZ |
1505 | { |
1506 | if (!RECORD_IS_REPLAY) | |
1507 | { | |
1508 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); | |
a6d9a66e | 1509 | int ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt); |
69d05d38 HZ |
1510 | |
1511 | do_cleanups (old_cleanups); | |
1512 | ||
1513 | return ret; | |
1514 | } | |
1515 | ||
1516 | return 0; | |
1517 | } | |
1518 | ||
6df67667 | 1519 | /* "to_can_execute_reverse" method for process record target. */ |
27699eea | 1520 | |
69d05d38 HZ |
1521 | static int |
1522 | record_can_execute_reverse (void) | |
1523 | { | |
1524 | return 1; | |
1525 | } | |
1526 | ||
1527 | static void | |
1528 | init_record_ops (void) | |
1529 | { | |
1530 | record_ops.to_shortname = "record"; | |
1531 | record_ops.to_longname = "Process record and replay target"; | |
1532 | record_ops.to_doc = | |
1533 | "Log program while executing and replay execution from log."; | |
1534 | record_ops.to_open = record_open; | |
1535 | record_ops.to_close = record_close; | |
1536 | record_ops.to_resume = record_resume; | |
1537 | record_ops.to_wait = record_wait; | |
1538 | record_ops.to_disconnect = record_disconnect; | |
1539 | record_ops.to_detach = record_detach; | |
1540 | record_ops.to_mourn_inferior = record_mourn_inferior; | |
1541 | record_ops.to_kill = record_kill; | |
1542 | record_ops.to_create_inferior = find_default_create_inferior; | |
1543 | record_ops.to_store_registers = record_store_registers; | |
1544 | record_ops.to_xfer_partial = record_xfer_partial; | |
1545 | record_ops.to_insert_breakpoint = record_insert_breakpoint; | |
1546 | record_ops.to_remove_breakpoint = record_remove_breakpoint; | |
1547 | record_ops.to_can_execute_reverse = record_can_execute_reverse; | |
1548 | record_ops.to_stratum = record_stratum; | |
1549 | record_ops.to_magic = OPS_MAGIC; | |
1550 | } | |
1551 | ||
27699eea MS |
1552 | /* "to_resume" method for prec over corefile. */ |
1553 | ||
1554 | static void | |
1555 | record_core_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1556 | enum target_signal signal) | |
1557 | { | |
1558 | record_resume_step = step; | |
1559 | } | |
1560 | ||
1561 | /* "to_kill" method for prec over corefile. */ | |
1562 | ||
1563 | static void | |
1564 | record_core_kill (struct target_ops *ops) | |
1565 | { | |
1566 | if (record_debug) | |
1567 | fprintf_unfiltered (gdb_stdlog, "Process record: record_core_kill\n"); | |
1568 | ||
1569 | unpush_target (&record_core_ops); | |
1570 | } | |
1571 | ||
1572 | /* "to_fetch_registers" method for prec over corefile. */ | |
1573 | ||
1574 | static void | |
1575 | record_core_fetch_registers (struct target_ops *ops, | |
1576 | struct regcache *regcache, | |
1577 | int regno) | |
1578 | { | |
1579 | if (regno < 0) | |
1580 | { | |
1581 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
1582 | int i; | |
1583 | ||
1584 | for (i = 0; i < num; i ++) | |
1585 | regcache_raw_supply (regcache, i, | |
1586 | record_core_regbuf + MAX_REGISTER_SIZE * i); | |
1587 | } | |
1588 | else | |
1589 | regcache_raw_supply (regcache, regno, | |
1590 | record_core_regbuf + MAX_REGISTER_SIZE * regno); | |
1591 | } | |
1592 | ||
1593 | /* "to_prepare_to_store" method for prec over corefile. */ | |
1594 | ||
1595 | static void | |
1596 | record_core_prepare_to_store (struct regcache *regcache) | |
1597 | { | |
1598 | } | |
1599 | ||
1600 | /* "to_store_registers" method for prec over corefile. */ | |
1601 | ||
1602 | static void | |
1603 | record_core_store_registers (struct target_ops *ops, | |
1604 | struct regcache *regcache, | |
1605 | int regno) | |
1606 | { | |
1607 | if (record_gdb_operation_disable) | |
1608 | regcache_raw_collect (regcache, regno, | |
1609 | record_core_regbuf + MAX_REGISTER_SIZE * regno); | |
1610 | else | |
1611 | error (_("You can't do that without a process to debug.")); | |
1612 | } | |
1613 | ||
1614 | /* "to_xfer_partial" method for prec over corefile. */ | |
1615 | ||
1616 | static LONGEST | |
1617 | record_core_xfer_partial (struct target_ops *ops, enum target_object object, | |
1618 | const char *annex, gdb_byte *readbuf, | |
1619 | const gdb_byte *writebuf, ULONGEST offset, | |
1620 | LONGEST len) | |
1621 | { | |
1622 | if (object == TARGET_OBJECT_MEMORY) | |
1623 | { | |
1624 | if (record_gdb_operation_disable || !writebuf) | |
1625 | { | |
1626 | struct target_section *p; | |
1627 | for (p = record_core_start; p < record_core_end; p++) | |
1628 | { | |
1629 | if (offset >= p->addr) | |
1630 | { | |
1631 | struct record_core_buf_entry *entry; | |
1632 | ||
1633 | if (offset >= p->endaddr) | |
1634 | continue; | |
1635 | ||
1636 | if (offset + len > p->endaddr) | |
1637 | len = p->endaddr - offset; | |
1638 | ||
1639 | offset -= p->addr; | |
1640 | ||
1641 | /* Read readbuf or write writebuf p, offset, len. */ | |
1642 | /* Check flags. */ | |
1643 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
1644 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
1645 | { | |
1646 | if (readbuf) | |
1647 | memset (readbuf, 0, len); | |
1648 | return len; | |
1649 | } | |
1650 | /* Get record_core_buf_entry. */ | |
1651 | for (entry = record_core_buf_list; entry; | |
1652 | entry = entry->prev) | |
1653 | if (entry->p == p) | |
1654 | break; | |
1655 | if (writebuf) | |
1656 | { | |
1657 | if (!entry) | |
1658 | { | |
1659 | /* Add a new entry. */ | |
1660 | entry | |
1661 | = (struct record_core_buf_entry *) | |
1662 | xmalloc | |
1663 | (sizeof (struct record_core_buf_entry)); | |
1664 | entry->p = p; | |
1665 | if (!bfd_malloc_and_get_section (p->bfd, | |
1666 | p->the_bfd_section, | |
1667 | &entry->buf)) | |
1668 | { | |
1669 | xfree (entry); | |
1670 | return 0; | |
1671 | } | |
1672 | entry->prev = record_core_buf_list; | |
1673 | record_core_buf_list = entry; | |
1674 | } | |
1675 | ||
1676 | memcpy (entry->buf + offset, writebuf, (size_t) len); | |
1677 | } | |
1678 | else | |
1679 | { | |
1680 | if (!entry) | |
1681 | return record_beneath_to_xfer_partial | |
1682 | (record_beneath_to_xfer_partial_ops, | |
1683 | object, annex, readbuf, writebuf, | |
1684 | offset, len); | |
1685 | ||
1686 | memcpy (readbuf, entry->buf + offset, (size_t) len); | |
1687 | } | |
1688 | ||
1689 | return len; | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | return -1; | |
1694 | } | |
1695 | else | |
1696 | error (_("You can't do that without a process to debug.")); | |
1697 | } | |
1698 | ||
1699 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
1700 | object, annex, readbuf, writebuf, | |
1701 | offset, len); | |
1702 | } | |
1703 | ||
1704 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
1705 | ||
1706 | static int | |
1707 | record_core_insert_breakpoint (struct gdbarch *gdbarch, | |
1708 | struct bp_target_info *bp_tgt) | |
1709 | { | |
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
1714 | ||
1715 | static int | |
1716 | record_core_remove_breakpoint (struct gdbarch *gdbarch, | |
1717 | struct bp_target_info *bp_tgt) | |
1718 | { | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | /* "to_has_execution" method for prec over corefile. */ | |
1723 | ||
1724 | int | |
1725 | record_core_has_execution (struct target_ops *ops) | |
1726 | { | |
1727 | return 1; | |
1728 | } | |
1729 | ||
1730 | static void | |
1731 | init_record_core_ops (void) | |
1732 | { | |
1733 | record_core_ops.to_shortname = "record_core"; | |
1734 | record_core_ops.to_longname = "Process record and replay target"; | |
1735 | record_core_ops.to_doc = | |
1736 | "Log program while executing and replay execution from log."; | |
1737 | record_core_ops.to_open = record_open; | |
1738 | record_core_ops.to_close = record_close; | |
1739 | record_core_ops.to_resume = record_core_resume; | |
1740 | record_core_ops.to_wait = record_wait; | |
1741 | record_core_ops.to_kill = record_core_kill; | |
1742 | record_core_ops.to_fetch_registers = record_core_fetch_registers; | |
1743 | record_core_ops.to_prepare_to_store = record_core_prepare_to_store; | |
1744 | record_core_ops.to_store_registers = record_core_store_registers; | |
1745 | record_core_ops.to_xfer_partial = record_core_xfer_partial; | |
1746 | record_core_ops.to_insert_breakpoint = record_core_insert_breakpoint; | |
1747 | record_core_ops.to_remove_breakpoint = record_core_remove_breakpoint; | |
1748 | record_core_ops.to_can_execute_reverse = record_can_execute_reverse; | |
1749 | record_core_ops.to_has_execution = record_core_has_execution; | |
1750 | record_core_ops.to_stratum = record_stratum; | |
1751 | record_core_ops.to_magic = OPS_MAGIC; | |
1752 | } | |
1753 | ||
6df67667 MS |
1754 | /* Implement "show record debug" command. */ |
1755 | ||
69d05d38 HZ |
1756 | static void |
1757 | show_record_debug (struct ui_file *file, int from_tty, | |
1758 | struct cmd_list_element *c, const char *value) | |
1759 | { | |
1760 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), | |
1761 | value); | |
1762 | } | |
1763 | ||
1764 | /* Alias for "target record". */ | |
1765 | ||
1766 | static void | |
1767 | cmd_record_start (char *args, int from_tty) | |
1768 | { | |
1769 | execute_command ("target record", from_tty); | |
1770 | } | |
1771 | ||
1772 | /* Truncate the record log from the present point | |
1773 | of replay until the end. */ | |
1774 | ||
1775 | static void | |
1776 | cmd_record_delete (char *args, int from_tty) | |
1777 | { | |
1778 | if (current_target.to_stratum == record_stratum) | |
1779 | { | |
1780 | if (RECORD_IS_REPLAY) | |
1781 | { | |
1782 | if (!from_tty || query (_("Delete the log from this point forward " | |
1783 | "and begin to record the running message " | |
1784 | "at current PC?"))) | |
61f75dd8 | 1785 | record_list_release_following (record_list); |
69d05d38 HZ |
1786 | } |
1787 | else | |
1788 | printf_unfiltered (_("Already at end of record list.\n")); | |
1789 | ||
1790 | } | |
1791 | else | |
1792 | printf_unfiltered (_("Process record is not started.\n")); | |
1793 | } | |
1794 | ||
6df67667 | 1795 | /* Implement the "stoprecord" or "record stop" command. */ |
69d05d38 HZ |
1796 | |
1797 | static void | |
1798 | cmd_record_stop (char *args, int from_tty) | |
1799 | { | |
1800 | if (current_target.to_stratum == record_stratum) | |
1801 | { | |
5d40bb85 | 1802 | unpush_target (&record_ops); |
b54295a7 MS |
1803 | printf_unfiltered (_("Process record is stopped and all execution " |
1804 | "logs are deleted.\n")); | |
69d05d38 HZ |
1805 | } |
1806 | else | |
1807 | printf_unfiltered (_("Process record is not started.\n")); | |
1808 | } | |
1809 | ||
1810 | /* Set upper limit of record log size. */ | |
1811 | ||
1812 | static void | |
1813 | set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c) | |
1814 | { | |
1815 | if (record_insn_num > record_insn_max_num && record_insn_max_num) | |
1816 | { | |
265aad34 | 1817 | /* Count down record_insn_num while releasing records from list. */ |
69d05d38 | 1818 | while (record_insn_num > record_insn_max_num) |
265aad34 MS |
1819 | { |
1820 | record_list_release_first (); | |
1821 | record_insn_num--; | |
1822 | } | |
69d05d38 HZ |
1823 | } |
1824 | } | |
1825 | ||
69d05d38 HZ |
1826 | static struct cmd_list_element *record_cmdlist, *set_record_cmdlist, |
1827 | *show_record_cmdlist, *info_record_cmdlist; | |
1828 | ||
1829 | static void | |
1830 | set_record_command (char *args, int from_tty) | |
1831 | { | |
1832 | printf_unfiltered (_("\ | |
1833 | \"set record\" must be followed by an apporpriate subcommand.\n")); | |
1834 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); | |
1835 | } | |
1836 | ||
1837 | static void | |
1838 | show_record_command (char *args, int from_tty) | |
1839 | { | |
1840 | cmd_show_list (show_record_cmdlist, from_tty, ""); | |
1841 | } | |
1842 | ||
b54295a7 MS |
1843 | /* Display some statistics about the execution log. */ |
1844 | ||
69d05d38 HZ |
1845 | static void |
1846 | info_record_command (char *args, int from_tty) | |
1847 | { | |
b54295a7 MS |
1848 | struct record_entry *p; |
1849 | ||
1850 | if (current_target.to_stratum == record_stratum) | |
1851 | { | |
1852 | if (RECORD_IS_REPLAY) | |
1853 | printf_filtered (_("Replay mode:\n")); | |
1854 | else | |
1855 | printf_filtered (_("Record mode:\n")); | |
1856 | ||
1857 | /* Find entry for first actual instruction in the log. */ | |
1858 | for (p = record_first.next; | |
1859 | p != NULL && p->type != record_end; | |
1860 | p = p->next) | |
1861 | ; | |
1862 | ||
1863 | /* Do we have a log at all? */ | |
1864 | if (p != NULL && p->type == record_end) | |
1865 | { | |
1866 | /* Display instruction number for first instruction in the log. */ | |
1867 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1868 | pulongest (p->u.end.insn_num)); | |
1869 | ||
1870 | /* If in replay mode, display where we are in the log. */ | |
1871 | if (RECORD_IS_REPLAY) | |
1872 | printf_filtered (_("Current instruction number is %s.\n"), | |
1873 | pulongest (record_list->u.end.insn_num)); | |
1874 | ||
1875 | /* Display instruction number for last instruction in the log. */ | |
1876 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
1877 | pulongest (record_insn_count)); | |
1878 | ||
1879 | /* Display log count. */ | |
1880 | printf_filtered (_("Log contains %d instructions.\n"), | |
1881 | record_insn_num); | |
1882 | } | |
1883 | else | |
1884 | { | |
1885 | printf_filtered (_("No instructions have been logged.\n")); | |
1886 | } | |
1887 | } | |
1888 | else | |
1889 | { | |
1890 | printf_filtered (_("target record is not active.\n")); | |
1891 | } | |
1892 | ||
1893 | /* Display max log size. */ | |
1894 | printf_filtered (_("Max logged instructions is %d.\n"), | |
1895 | record_insn_max_num); | |
69d05d38 HZ |
1896 | } |
1897 | ||
0156b218 MS |
1898 | /* Record log save-file format |
1899 | Version 1 (never released) | |
1900 | ||
1901 | Header: | |
1902 | 4 bytes: magic number htonl(0x20090829). | |
1903 | NOTE: be sure to change whenever this file format changes! | |
1904 | ||
1905 | Records: | |
1906 | record_end: | |
1907 | 1 byte: record type (record_end, see enum record_type). | |
1908 | record_reg: | |
1909 | 1 byte: record type (record_reg, see enum record_type). | |
1910 | 8 bytes: register id (network byte order). | |
1911 | MAX_REGISTER_SIZE bytes: register value. | |
1912 | record_mem: | |
1913 | 1 byte: record type (record_mem, see enum record_type). | |
1914 | 8 bytes: memory length (network byte order). | |
1915 | 8 bytes: memory address (network byte order). | |
1916 | n bytes: memory value (n == memory length). | |
1917 | ||
1918 | Version 2 | |
1919 | 4 bytes: magic number netorder32(0x20091016). | |
1920 | NOTE: be sure to change whenever this file format changes! | |
1921 | ||
1922 | Records: | |
1923 | record_end: | |
1924 | 1 byte: record type (record_end, see enum record_type). | |
1925 | 4 bytes: signal | |
1926 | 4 bytes: instruction count | |
1927 | record_reg: | |
1928 | 1 byte: record type (record_reg, see enum record_type). | |
1929 | 4 bytes: register id (network byte order). | |
1930 | n bytes: register value (n == actual register size). | |
1931 | (eg. 4 bytes for x86 general registers). | |
1932 | record_mem: | |
1933 | 1 byte: record type (record_mem, see enum record_type). | |
1934 | 4 bytes: memory length (network byte order). | |
1935 | 8 bytes: memory address (network byte order). | |
1936 | n bytes: memory value (n == memory length). | |
1937 | ||
1938 | */ | |
1939 | ||
1940 | /* bfdcore_read -- read bytes from a core file section. */ | |
1941 | ||
1942 | static inline void | |
1943 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
1944 | { | |
1945 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
1946 | ||
1947 | if (ret) | |
1948 | *offset += len; | |
1949 | else | |
1950 | error (_("Failed to read %d bytes from core file %s ('%s').\n"), | |
1951 | len, bfd_get_filename (obfd), | |
1952 | bfd_errmsg (bfd_get_error ())); | |
1953 | } | |
1954 | ||
1955 | static inline uint64_t | |
1956 | netorder64 (uint64_t fromfile) | |
1957 | { | |
4e06ab74 | 1958 | return (BYTE_ORDER == BFD_ENDIAN_LITTLE) |
0156b218 MS |
1959 | ? bswap_64 (fromfile) |
1960 | : fromfile; | |
1961 | } | |
1962 | ||
1963 | static inline uint32_t | |
1964 | netorder32 (uint32_t fromfile) | |
1965 | { | |
4e06ab74 | 1966 | return (BYTE_ORDER == BFD_ENDIAN_LITTLE) |
0156b218 MS |
1967 | ? bswap_32 (fromfile) |
1968 | : fromfile; | |
1969 | } | |
1970 | ||
1971 | static inline uint16_t | |
1972 | netorder16 (uint16_t fromfile) | |
1973 | { | |
4e06ab74 | 1974 | return (BYTE_ORDER == BFD_ENDIAN_LITTLE) |
0156b218 MS |
1975 | ? bswap_16 (fromfile) |
1976 | : fromfile; | |
1977 | } | |
1978 | ||
1979 | /* Restore the execution log from a core_bfd file. */ | |
1980 | static void | |
1981 | record_restore (void) | |
1982 | { | |
1983 | uint32_t magic; | |
1984 | struct cleanup *old_cleanups; | |
1985 | struct record_entry *rec; | |
1986 | asection *osec; | |
1987 | uint32_t osec_size; | |
1988 | int bfd_offset = 0; | |
1989 | struct regcache *regcache; | |
1990 | ||
1991 | /* We restore the execution log from the open core bfd, | |
1992 | if there is one. */ | |
1993 | if (core_bfd == NULL) | |
1994 | return; | |
1995 | ||
1996 | /* "record_restore" can only be called when record list is empty. */ | |
1997 | gdb_assert (record_first.next == NULL); | |
1998 | ||
1999 | if (record_debug) | |
2000 | printf_filtered ("Restoring recording from core file.\n"); | |
2001 | ||
2002 | /* Now need to find our special note section. */ | |
2003 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2004 | osec_size = bfd_section_size (core_bfd, osec); | |
2005 | if (record_debug) | |
2006 | printf_filtered ("Find precord section %s.\n", | |
2007 | osec ? "succeeded" : "failed"); | |
2008 | if (!osec) | |
2009 | return; | |
2010 | if (record_debug) | |
2011 | printf_filtered ("%s", bfd_section_name (core_bfd, osec)); | |
2012 | ||
2013 | /* Check the magic code. */ | |
2014 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
2015 | if (magic != RECORD_FILE_MAGIC) | |
2016 | error (_("Version mis-match or file format error in core file %s."), | |
2017 | bfd_get_filename (core_bfd)); | |
2018 | if (record_debug) | |
2019 | printf_filtered ("\ | |
1de1372d HZ |
2020 | Reading 4-byte magic cookie RECORD_FILE_MAGIC (0x%s)\n", |
2021 | phex_nz (netorder32 (magic), 4)); | |
0156b218 MS |
2022 | |
2023 | /* Restore the entries in recfd into record_arch_list_head and | |
2024 | record_arch_list_tail. */ | |
2025 | record_arch_list_head = NULL; | |
2026 | record_arch_list_tail = NULL; | |
2027 | record_insn_num = 0; | |
2028 | old_cleanups = make_cleanup (record_arch_list_cleanups, 0); | |
2029 | regcache = get_current_regcache (); | |
2030 | ||
2031 | while (1) | |
2032 | { | |
2033 | int ret; | |
2034 | uint8_t tmpu8; | |
2035 | uint32_t regnum, len, signal, count; | |
2036 | uint64_t addr; | |
2037 | ||
2038 | /* We are finished when offset reaches osec_size. */ | |
2039 | if (bfd_offset >= osec_size) | |
2040 | break; | |
2041 | bfdcore_read (core_bfd, osec, &tmpu8, sizeof (tmpu8), &bfd_offset); | |
2042 | ||
2043 | switch (tmpu8) | |
2044 | { | |
2045 | case record_reg: /* reg */ | |
2046 | /* Get register number to regnum. */ | |
2047 | bfdcore_read (core_bfd, osec, ®num, | |
2048 | sizeof (regnum), &bfd_offset); | |
2049 | regnum = netorder32 (regnum); | |
2050 | ||
2051 | rec = record_reg_alloc (regcache, regnum); | |
2052 | ||
2053 | /* Get val. */ | |
2054 | bfdcore_read (core_bfd, osec, record_get_loc (rec), | |
2055 | rec->u.reg.len, &bfd_offset); | |
2056 | ||
2057 | if (record_debug) | |
2058 | printf_filtered ("\ | |
99ff666f | 2059 | Reading register %d (1 plus %lu plus %d bytes)\n", |
0156b218 | 2060 | rec->u.reg.num, |
99ff666f | 2061 | (unsigned long) sizeof (regnum), |
0156b218 MS |
2062 | rec->u.reg.len); |
2063 | break; | |
2064 | ||
2065 | case record_mem: /* mem */ | |
2066 | /* Get len. */ | |
2067 | bfdcore_read (core_bfd, osec, &len, | |
2068 | sizeof (len), &bfd_offset); | |
2069 | len = netorder32 (len); | |
2070 | ||
2071 | /* Get addr. */ | |
2072 | bfdcore_read (core_bfd, osec, &addr, | |
2073 | sizeof (addr), &bfd_offset); | |
2074 | addr = netorder64 (addr); | |
2075 | ||
2076 | rec = record_mem_alloc (addr, len); | |
2077 | ||
2078 | /* Get val. */ | |
2079 | bfdcore_read (core_bfd, osec, record_get_loc (rec), | |
2080 | rec->u.mem.len, &bfd_offset); | |
2081 | ||
2082 | if (record_debug) | |
2083 | printf_filtered ("\ | |
99ff666f | 2084 | Reading memory %s (1 plus %lu plus %lu plus %d bytes)\n", |
0156b218 MS |
2085 | paddress (get_current_arch (), |
2086 | rec->u.mem.addr), | |
99ff666f PP |
2087 | (unsigned long) sizeof (addr), |
2088 | (unsigned long) sizeof (len), | |
0156b218 MS |
2089 | rec->u.mem.len); |
2090 | break; | |
2091 | ||
2092 | case record_end: /* end */ | |
2093 | rec = record_end_alloc (); | |
2094 | record_insn_num ++; | |
2095 | ||
2096 | /* Get signal value. */ | |
2097 | bfdcore_read (core_bfd, osec, &signal, | |
2098 | sizeof (signal), &bfd_offset); | |
2099 | signal = netorder32 (signal); | |
2100 | rec->u.end.sigval = signal; | |
2101 | ||
2102 | /* Get insn count. */ | |
2103 | bfdcore_read (core_bfd, osec, &count, | |
2104 | sizeof (count), &bfd_offset); | |
2105 | count = netorder32 (count); | |
2106 | rec->u.end.insn_num = count; | |
2107 | record_insn_count = count + 1; | |
2108 | if (record_debug) | |
2109 | printf_filtered ("\ | |
99ff666f PP |
2110 | Reading record_end (1 + %lu + %lu bytes), offset == %s\n", |
2111 | (unsigned long) sizeof (signal), | |
2112 | (unsigned long) sizeof (count), | |
0156b218 MS |
2113 | paddress (get_current_arch (), |
2114 | bfd_offset)); | |
2115 | break; | |
2116 | ||
2117 | default: | |
2118 | error (_("Bad entry type in core file %s."), | |
2119 | bfd_get_filename (core_bfd)); | |
2120 | break; | |
2121 | } | |
2122 | ||
2123 | /* Add rec to record arch list. */ | |
2124 | record_arch_list_add (rec); | |
2125 | } | |
2126 | ||
2127 | discard_cleanups (old_cleanups); | |
2128 | ||
2129 | /* Add record_arch_list_head to the end of record list. */ | |
2130 | record_first.next = record_arch_list_head; | |
2131 | record_arch_list_head->prev = &record_first; | |
2132 | record_arch_list_tail->next = NULL; | |
2133 | record_list = &record_first; | |
2134 | ||
2135 | /* Update record_insn_max_num. */ | |
2136 | if (record_insn_num > record_insn_max_num) | |
2137 | { | |
2138 | record_insn_max_num = record_insn_num; | |
2139 | warning (_("Auto increase record/replay buffer limit to %d."), | |
2140 | record_insn_max_num); | |
2141 | } | |
2142 | ||
2143 | /* Succeeded. */ | |
2144 | printf_filtered (_("Restored records from core file %s.\n"), | |
2145 | bfd_get_filename (core_bfd)); | |
2146 | ||
2147 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
2148 | } | |
2149 | ||
2150 | /* bfdcore_write -- write bytes into a core file section. */ | |
2151 | ||
2152 | static inline void | |
2153 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2154 | { | |
2155 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2156 | ||
2157 | if (ret) | |
2158 | *offset += len; | |
2159 | else | |
2160 | error (_("Failed to write %d bytes to core file %s ('%s').\n"), | |
2161 | len, bfd_get_filename (obfd), | |
2162 | bfd_errmsg (bfd_get_error ())); | |
2163 | } | |
2164 | ||
2165 | /* Restore the execution log from a file. We use a modified elf | |
2166 | corefile format, with an extra section for our data. */ | |
2167 | ||
2168 | static void | |
2169 | cmd_record_restore (char *args, int from_tty) | |
2170 | { | |
2171 | core_file_command (args, from_tty); | |
2172 | record_open (args, from_tty); | |
2173 | } | |
2174 | ||
2175 | static void | |
2176 | record_save_cleanups (void *data) | |
2177 | { | |
2178 | bfd *obfd = data; | |
2179 | char *pathname = xstrdup (bfd_get_filename (obfd)); | |
2180 | bfd_close (obfd); | |
2181 | unlink (pathname); | |
2182 | xfree (pathname); | |
2183 | } | |
2184 | ||
2185 | /* Save the execution log to a file. We use a modified elf corefile | |
2186 | format, with an extra section for our data. */ | |
2187 | ||
2188 | static void | |
2189 | cmd_record_save (char *args, int from_tty) | |
2190 | { | |
2191 | char *recfilename, recfilename_buffer[40]; | |
2192 | int recfd; | |
2193 | struct record_entry *cur_record_list; | |
2194 | uint32_t magic; | |
2195 | struct regcache *regcache; | |
2196 | struct gdbarch *gdbarch; | |
2197 | struct cleanup *old_cleanups; | |
2198 | struct cleanup *set_cleanups; | |
2199 | bfd *obfd; | |
2200 | int save_size = 0; | |
2201 | asection *osec = NULL; | |
2202 | int bfd_offset = 0; | |
2203 | ||
2204 | if (strcmp (current_target.to_shortname, "record") != 0) | |
2205 | error (_("This command can only be used with target 'record'.\n" | |
2206 | "Use 'target record' first.\n")); | |
2207 | ||
2208 | if (args && *args) | |
2209 | recfilename = args; | |
2210 | else | |
2211 | { | |
2212 | /* Default recfile name is "gdb_record.PID". */ | |
2213 | snprintf (recfilename_buffer, sizeof (recfilename_buffer), | |
2214 | "gdb_record.%d", PIDGET (inferior_ptid)); | |
2215 | recfilename = recfilename_buffer; | |
2216 | } | |
2217 | ||
2218 | /* Open the save file. */ | |
2219 | if (record_debug) | |
2220 | printf_filtered ("Saving execution log to core file '%s'\n", recfilename); | |
2221 | ||
2222 | /* Open the output file. */ | |
2223 | obfd = create_gcore_bfd (recfilename); | |
2224 | old_cleanups = make_cleanup (record_save_cleanups, obfd); | |
2225 | ||
2226 | /* Save the current record entry to "cur_record_list". */ | |
2227 | cur_record_list = record_list; | |
2228 | ||
2229 | /* Get the values of regcache and gdbarch. */ | |
2230 | regcache = get_current_regcache (); | |
2231 | gdbarch = get_regcache_arch (regcache); | |
2232 | ||
2233 | /* Disable the GDB operation record. */ | |
2234 | set_cleanups = record_gdb_operation_disable_set (); | |
2235 | ||
2236 | /* Reverse execute to the begin of record list. */ | |
2237 | while (1) | |
2238 | { | |
2239 | /* Check for beginning and end of log. */ | |
2240 | if (record_list == &record_first) | |
2241 | break; | |
2242 | ||
2243 | record_exec_insn (regcache, gdbarch, record_list); | |
2244 | ||
2245 | if (record_list->prev) | |
2246 | record_list = record_list->prev; | |
2247 | } | |
2248 | ||
2249 | /* Compute the size needed for the extra bfd section. */ | |
2250 | save_size = 4; /* magic cookie */ | |
2251 | for (record_list = record_first.next; record_list; | |
2252 | record_list = record_list->next) | |
2253 | switch (record_list->type) | |
2254 | { | |
2255 | case record_end: | |
2256 | save_size += 1 + 4 + 4; | |
2257 | break; | |
2258 | case record_reg: | |
2259 | save_size += 1 + 4 + record_list->u.reg.len; | |
2260 | break; | |
2261 | case record_mem: | |
2262 | save_size += 1 + 4 + 8 + record_list->u.mem.len; | |
2263 | break; | |
2264 | } | |
2265 | ||
2266 | /* Make the new bfd section. */ | |
2267 | osec = bfd_make_section_anyway_with_flags (obfd, "precord", | |
2268 | SEC_HAS_CONTENTS | |
2269 | | SEC_READONLY); | |
2270 | if (osec == NULL) | |
2271 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2272 | recfilename, | |
2273 | bfd_errmsg (bfd_get_error ())); | |
2274 | bfd_set_section_size (obfd, osec, save_size); | |
2275 | bfd_set_section_vma (obfd, osec, 0); | |
2276 | bfd_set_section_alignment (obfd, osec, 0); | |
2277 | bfd_section_lma (obfd, osec) = 0; | |
2278 | ||
2279 | /* Save corefile state. */ | |
2280 | write_gcore_file (obfd); | |
2281 | ||
2282 | /* Write out the record log. */ | |
2283 | /* Write the magic code. */ | |
2284 | magic = RECORD_FILE_MAGIC; | |
2285 | if (record_debug) | |
2286 | printf_filtered ("\ | |
1de1372d HZ |
2287 | Writing 4-byte magic cookie RECORD_FILE_MAGIC (0x%s)\n", |
2288 | phex_nz (magic, 4)); | |
0156b218 MS |
2289 | bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset); |
2290 | ||
2291 | /* Save the entries to recfd and forward execute to the end of | |
2292 | record list. */ | |
2293 | record_list = &record_first; | |
2294 | while (1) | |
2295 | { | |
2296 | /* Save entry. */ | |
2297 | if (record_list != &record_first) | |
2298 | { | |
2299 | uint8_t type; | |
2300 | uint32_t regnum, len, signal, count; | |
2301 | uint64_t addr; | |
2302 | ||
2303 | type = record_list->type; | |
2304 | bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset); | |
2305 | ||
2306 | switch (record_list->type) | |
2307 | { | |
2308 | case record_reg: /* reg */ | |
2309 | if (record_debug) | |
2310 | printf_filtered ("\ | |
99ff666f | 2311 | Writing register %d (1 plus %lu plus %d bytes)\n", |
0156b218 | 2312 | record_list->u.reg.num, |
99ff666f | 2313 | (unsigned long) sizeof (regnum), |
0156b218 MS |
2314 | record_list->u.reg.len); |
2315 | ||
2316 | /* Write regnum. */ | |
2317 | regnum = netorder32 (record_list->u.reg.num); | |
2318 | bfdcore_write (obfd, osec, ®num, | |
2319 | sizeof (regnum), &bfd_offset); | |
2320 | ||
2321 | /* Write regval. */ | |
2322 | bfdcore_write (obfd, osec, record_get_loc (record_list), | |
2323 | record_list->u.reg.len, &bfd_offset); | |
2324 | break; | |
2325 | ||
2326 | case record_mem: /* mem */ | |
2327 | if (record_debug) | |
2328 | printf_filtered ("\ | |
99ff666f | 2329 | Writing memory %s (1 plus %lu plus %lu plus %d bytes)\n", |
0156b218 MS |
2330 | paddress (gdbarch, |
2331 | record_list->u.mem.addr), | |
99ff666f PP |
2332 | (unsigned long) sizeof (addr), |
2333 | (unsigned long) sizeof (len), | |
0156b218 MS |
2334 | record_list->u.mem.len); |
2335 | ||
2336 | /* Write memlen. */ | |
2337 | len = netorder32 (record_list->u.mem.len); | |
2338 | bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset); | |
2339 | ||
2340 | /* Write memaddr. */ | |
2341 | addr = netorder64 (record_list->u.mem.addr); | |
2342 | bfdcore_write (obfd, osec, &addr, | |
2343 | sizeof (addr), &bfd_offset); | |
2344 | ||
2345 | /* Write memval. */ | |
2346 | bfdcore_write (obfd, osec, record_get_loc (record_list), | |
2347 | record_list->u.mem.len, &bfd_offset); | |
2348 | break; | |
2349 | ||
2350 | case record_end: | |
2351 | if (record_debug) | |
2352 | printf_filtered ("\ | |
99ff666f PP |
2353 | Writing record_end (1 + %lu + %lu bytes)\n", |
2354 | (unsigned long) sizeof (signal), | |
2355 | (unsigned long) sizeof (count)); | |
0156b218 MS |
2356 | /* Write signal value. */ |
2357 | signal = netorder32 (record_list->u.end.sigval); | |
2358 | bfdcore_write (obfd, osec, &signal, | |
2359 | sizeof (signal), &bfd_offset); | |
2360 | ||
2361 | /* Write insn count. */ | |
2362 | count = netorder32 (record_list->u.end.insn_num); | |
2363 | bfdcore_write (obfd, osec, &count, | |
2364 | sizeof (count), &bfd_offset); | |
2365 | break; | |
2366 | } | |
2367 | } | |
2368 | ||
2369 | /* Execute entry. */ | |
2370 | record_exec_insn (regcache, gdbarch, record_list); | |
2371 | ||
2372 | if (record_list->next) | |
2373 | record_list = record_list->next; | |
2374 | else | |
2375 | break; | |
2376 | } | |
2377 | ||
2378 | /* Reverse execute to cur_record_list. */ | |
2379 | while (1) | |
2380 | { | |
2381 | /* Check for beginning and end of log. */ | |
2382 | if (record_list == cur_record_list) | |
2383 | break; | |
2384 | ||
2385 | record_exec_insn (regcache, gdbarch, record_list); | |
2386 | ||
2387 | if (record_list->prev) | |
2388 | record_list = record_list->prev; | |
2389 | } | |
2390 | ||
2391 | do_cleanups (set_cleanups); | |
2392 | bfd_close (obfd); | |
2393 | discard_cleanups (old_cleanups); | |
2394 | ||
2395 | /* Succeeded. */ | |
2396 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2397 | recfilename); | |
2398 | } | |
2399 | ||
69d05d38 HZ |
2400 | void |
2401 | _initialize_record (void) | |
2402 | { | |
0156b218 MS |
2403 | struct cmd_list_element *c; |
2404 | ||
69d05d38 HZ |
2405 | /* Init record_first. */ |
2406 | record_first.prev = NULL; | |
2407 | record_first.next = NULL; | |
2408 | record_first.type = record_end; | |
2409 | ||
2410 | init_record_ops (); | |
2411 | add_target (&record_ops); | |
27699eea MS |
2412 | init_record_core_ops (); |
2413 | add_target (&record_core_ops); | |
69d05d38 HZ |
2414 | |
2415 | add_setshow_zinteger_cmd ("record", no_class, &record_debug, | |
2416 | _("Set debugging of record/replay feature."), | |
2417 | _("Show debugging of record/replay feature."), | |
2418 | _("When enabled, debugging output for " | |
2419 | "record/replay feature is displayed."), | |
2420 | NULL, show_record_debug, &setdebuglist, | |
2421 | &showdebuglist); | |
2422 | ||
0156b218 MS |
2423 | c = add_prefix_cmd ("record", class_obscure, cmd_record_start, |
2424 | _("Abbreviated form of \"target record\" command."), | |
2425 | &record_cmdlist, "record ", 0, &cmdlist); | |
2426 | set_cmd_completer (c, filename_completer); | |
2427 | ||
69d05d38 HZ |
2428 | add_com_alias ("rec", "record", class_obscure, 1); |
2429 | add_prefix_cmd ("record", class_support, set_record_command, | |
2430 | _("Set record options"), &set_record_cmdlist, | |
2431 | "set record ", 0, &setlist); | |
2432 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); | |
2433 | add_prefix_cmd ("record", class_support, show_record_command, | |
2434 | _("Show record options"), &show_record_cmdlist, | |
2435 | "show record ", 0, &showlist); | |
2436 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); | |
2437 | add_prefix_cmd ("record", class_support, info_record_command, | |
2438 | _("Info record options"), &info_record_cmdlist, | |
2439 | "info record ", 0, &infolist); | |
2440 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); | |
2441 | ||
0156b218 MS |
2442 | c = add_cmd ("save", class_obscure, cmd_record_save, |
2443 | _("Save the execution log to a file.\n\ | |
2444 | Argument is optional filename.\n\ | |
2445 | Default filename is 'gdb_record.<process_id>'."), | |
2446 | &record_cmdlist); | |
2447 | set_cmd_completer (c, filename_completer); | |
2448 | ||
2449 | c = add_cmd ("restore", class_obscure, cmd_record_restore, | |
2450 | _("Restore the execution log from a file.\n\ | |
2451 | Argument is filename. File must be created with 'record save'."), | |
2452 | &record_cmdlist); | |
2453 | set_cmd_completer (c, filename_completer); | |
69d05d38 HZ |
2454 | |
2455 | add_cmd ("delete", class_obscure, cmd_record_delete, | |
2456 | _("Delete the rest of execution log and start recording it anew."), | |
2457 | &record_cmdlist); | |
2458 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); | |
2459 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); | |
2460 | ||
2461 | add_cmd ("stop", class_obscure, cmd_record_stop, | |
2462 | _("Stop the record/replay target."), | |
2463 | &record_cmdlist); | |
2464 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); | |
2465 | ||
2466 | /* Record instructions number limit command. */ | |
2467 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
fda458ee | 2468 | &record_stop_at_limit, _("\ |
299a410e EZ |
2469 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2470 | Show whether record/replay stops when record/replay buffer becomes full."), _("\ | |
2471 | Default is ON.\n\ | |
2472 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2473 | When OFF, if the record/replay buffer becomes full,\n\ | |
2474 | delete the oldest recorded instruction to make room for each new one."), | |
fda458ee MS |
2475 | NULL, NULL, |
2476 | &set_record_cmdlist, &show_record_cmdlist); | |
191e1813 | 2477 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
69d05d38 HZ |
2478 | &record_insn_max_num, |
2479 | _("Set record/replay buffer limit."), | |
299a410e EZ |
2480 | _("Show record/replay buffer limit."), _("\ |
2481 | Set the maximum number of instructions to be stored in the\n\ | |
2482 | record/replay buffer. Zero means unlimited. Default is 200000."), | |
69d05d38 HZ |
2483 | set_record_insn_max_num, |
2484 | NULL, &set_record_cmdlist, &show_record_cmdlist); | |
69d05d38 | 2485 | } |