Commit | Line | Data |
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69d05d38 HZ |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
0b302171 | 3 | Copyright (C) 2008-2012 Free Software Foundation, Inc. |
69d05d38 HZ |
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" | |
32231432 PA |
33 | #include "event-loop.h" |
34 | #include "inf-loop.h" | |
cbb099e8 | 35 | #include "gdb_bfd.h" |
69d05d38 HZ |
36 | |
37 | #include <signal.h> | |
38 | ||
6df67667 MS |
39 | /* This module implements "target record", also known as "process |
40 | record and replay". This target sits on top of a "normal" target | |
41 | (a target that "has execution"), and provides a record and replay | |
42 | functionality, including reverse debugging. | |
43 | ||
44 | Target record has two modes: recording, and replaying. | |
45 | ||
46 | In record mode, we intercept the to_resume and to_wait methods. | |
47 | Whenever gdb resumes the target, we run the target in single step | |
48 | mode, and we build up an execution log in which, for each executed | |
49 | instruction, we record all changes in memory and register state. | |
50 | This is invisible to the user, to whom it just looks like an | |
51 | ordinary debugging session (except for performance degredation). | |
52 | ||
53 | In replay mode, instead of actually letting the inferior run as a | |
54 | process, we simulate its execution by playing back the recorded | |
55 | execution log. For each instruction in the log, we simulate the | |
56 | instruction's side effects by duplicating the changes that it would | |
57 | have made on memory and registers. */ | |
58 | ||
69d05d38 HZ |
59 | #define DEFAULT_RECORD_INSN_MAX_NUM 200000 |
60 | ||
61 | #define RECORD_IS_REPLAY \ | |
62 | (record_list->next || execution_direction == EXEC_REVERSE) | |
63 | ||
0156b218 MS |
64 | #define RECORD_FILE_MAGIC netorder32(0x20091016) |
65 | ||
fda458ee | 66 | /* These are the core structs of the process record functionality. |
69d05d38 | 67 | |
fda458ee | 68 | A record_entry is a record of the value change of a register |
69d05d38 | 69 | ("record_reg") or a part of memory ("record_mem"). And each |
fda458ee MS |
70 | instruction must have a struct record_entry ("record_end") that |
71 | indicates that this is the last struct record_entry of this | |
72 | instruction. | |
69d05d38 | 73 | |
fda458ee MS |
74 | Each struct record_entry is linked to "record_list" by "prev" and |
75 | "next" pointers. */ | |
69d05d38 | 76 | |
69d05d38 HZ |
77 | struct record_mem_entry |
78 | { | |
79 | CORE_ADDR addr; | |
80 | int len; | |
afd0cd3f MS |
81 | /* Set this flag if target memory for this entry |
82 | can no longer be accessed. */ | |
83 | int mem_entry_not_accessible; | |
44389f9b MS |
84 | union |
85 | { | |
86 | gdb_byte *ptr; | |
87 | gdb_byte buf[sizeof (gdb_byte *)]; | |
88 | } u; | |
89 | }; | |
90 | ||
91 | struct record_reg_entry | |
92 | { | |
93 | unsigned short num; | |
94 | unsigned short len; | |
95 | union | |
96 | { | |
97 | gdb_byte *ptr; | |
98 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
99 | } u; | |
69d05d38 HZ |
100 | }; |
101 | ||
8b739a96 HZ |
102 | struct record_end_entry |
103 | { | |
2ea28649 | 104 | enum gdb_signal sigval; |
b54295a7 | 105 | ULONGEST insn_num; |
8b739a96 HZ |
106 | }; |
107 | ||
69d05d38 HZ |
108 | enum record_type |
109 | { | |
110 | record_end = 0, | |
111 | record_reg, | |
112 | record_mem | |
113 | }; | |
114 | ||
6df67667 MS |
115 | /* This is the data structure that makes up the execution log. |
116 | ||
117 | The execution log consists of a single linked list of entries | |
118 | of type "struct record_entry". It is doubly linked so that it | |
119 | can be traversed in either direction. | |
120 | ||
121 | The start of the list is anchored by a struct called | |
122 | "record_first". The pointer "record_list" either points to the | |
123 | last entry that was added to the list (in record mode), or to the | |
124 | next entry in the list that will be executed (in replay mode). | |
125 | ||
126 | Each list element (struct record_entry), in addition to next and | |
127 | prev pointers, consists of a union of three entry types: mem, reg, | |
128 | and end. A field called "type" determines which entry type is | |
129 | represented by a given list element. | |
130 | ||
131 | Each instruction that is added to the execution log is represented | |
132 | by a variable number of list elements ('entries'). The instruction | |
133 | will have one "reg" entry for each register that is changed by | |
134 | executing the instruction (including the PC in every case). It | |
135 | will also have one "mem" entry for each memory change. Finally, | |
136 | each instruction will have an "end" entry that separates it from | |
137 | the changes associated with the next instruction. */ | |
138 | ||
69d05d38 HZ |
139 | struct record_entry |
140 | { | |
141 | struct record_entry *prev; | |
142 | struct record_entry *next; | |
143 | enum record_type type; | |
144 | union | |
145 | { | |
146 | /* reg */ | |
147 | struct record_reg_entry reg; | |
148 | /* mem */ | |
149 | struct record_mem_entry mem; | |
8b739a96 HZ |
150 | /* end */ |
151 | struct record_end_entry end; | |
69d05d38 HZ |
152 | } u; |
153 | }; | |
154 | ||
155 | /* This is the debug switch for process record. */ | |
156 | int record_debug = 0; | |
157 | ||
bb08c432 HZ |
158 | /* If true, query if PREC cannot record memory |
159 | change of next instruction. */ | |
160 | int record_memory_query = 0; | |
161 | ||
27699eea MS |
162 | struct record_core_buf_entry |
163 | { | |
164 | struct record_core_buf_entry *prev; | |
165 | struct target_section *p; | |
166 | bfd_byte *buf; | |
167 | }; | |
168 | ||
169 | /* Record buf with core target. */ | |
170 | static gdb_byte *record_core_regbuf = NULL; | |
171 | static struct target_section *record_core_start; | |
172 | static struct target_section *record_core_end; | |
173 | static struct record_core_buf_entry *record_core_buf_list = NULL; | |
174 | ||
6df67667 MS |
175 | /* The following variables are used for managing the linked list that |
176 | represents the execution log. | |
177 | ||
178 | record_first is the anchor that holds down the beginning of the list. | |
179 | ||
180 | record_list serves two functions: | |
181 | 1) In record mode, it anchors the end of the list. | |
182 | 2) In replay mode, it traverses the list and points to | |
183 | the next instruction that must be emulated. | |
184 | ||
185 | record_arch_list_head and record_arch_list_tail are used to manage | |
186 | a separate list, which is used to build up the change elements of | |
187 | the currently executing instruction during record mode. When this | |
188 | instruction has been completely annotated in the "arch list", it | |
189 | will be appended to the main execution log. */ | |
190 | ||
69d05d38 HZ |
191 | static struct record_entry record_first; |
192 | static struct record_entry *record_list = &record_first; | |
193 | static struct record_entry *record_arch_list_head = NULL; | |
194 | static struct record_entry *record_arch_list_tail = NULL; | |
195 | ||
196 | /* 1 ask user. 0 auto delete the last struct record_entry. */ | |
197 | static int record_stop_at_limit = 1; | |
b54295a7 | 198 | /* Maximum allowed number of insns in execution log. */ |
191e1813 | 199 | static unsigned int record_insn_max_num = DEFAULT_RECORD_INSN_MAX_NUM; |
b54295a7 | 200 | /* Actual count of insns presently in execution log. */ |
69d05d38 | 201 | static int record_insn_num = 0; |
b54295a7 MS |
202 | /* Count of insns logged so far (may be larger |
203 | than count of insns presently in execution log). */ | |
204 | static ULONGEST record_insn_count; | |
69d05d38 HZ |
205 | |
206 | /* The target_ops of process record. */ | |
207 | static struct target_ops record_ops; | |
27699eea | 208 | static struct target_ops record_core_ops; |
69d05d38 HZ |
209 | |
210 | /* The beneath function pointers. */ | |
211 | static struct target_ops *record_beneath_to_resume_ops; | |
212 | static void (*record_beneath_to_resume) (struct target_ops *, ptid_t, int, | |
2ea28649 | 213 | enum gdb_signal); |
69d05d38 HZ |
214 | static struct target_ops *record_beneath_to_wait_ops; |
215 | static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t, | |
47608cb1 PA |
216 | struct target_waitstatus *, |
217 | int); | |
69d05d38 HZ |
218 | static struct target_ops *record_beneath_to_store_registers_ops; |
219 | static void (*record_beneath_to_store_registers) (struct target_ops *, | |
220 | struct regcache *, | |
221 | int regno); | |
222 | static struct target_ops *record_beneath_to_xfer_partial_ops; | |
223 | static LONGEST (*record_beneath_to_xfer_partial) (struct target_ops *ops, | |
224 | enum target_object object, | |
225 | const char *annex, | |
226 | gdb_byte *readbuf, | |
227 | const gdb_byte *writebuf, | |
228 | ULONGEST offset, | |
229 | LONGEST len); | |
a6d9a66e UW |
230 | static int (*record_beneath_to_insert_breakpoint) (struct gdbarch *, |
231 | struct bp_target_info *); | |
232 | static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *, | |
233 | struct bp_target_info *); | |
9093389c PA |
234 | static int (*record_beneath_to_stopped_by_watchpoint) (void); |
235 | static int (*record_beneath_to_stopped_data_address) (struct target_ops *, | |
236 | CORE_ADDR *); | |
32231432 | 237 | static void (*record_beneath_to_async) (void (*) (enum inferior_event_type, void *), void *); |
69d05d38 | 238 | |
61f75dd8 MS |
239 | /* Alloc and free functions for record_reg, record_mem, and record_end |
240 | entries. */ | |
241 | ||
242 | /* Alloc a record_reg record entry. */ | |
243 | ||
244 | static inline struct record_entry * | |
245 | record_reg_alloc (struct regcache *regcache, int regnum) | |
246 | { | |
247 | struct record_entry *rec; | |
248 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
249 | ||
250 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
251 | rec->type = record_reg; | |
252 | rec->u.reg.num = regnum; | |
44389f9b MS |
253 | rec->u.reg.len = register_size (gdbarch, regnum); |
254 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
255 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
61f75dd8 MS |
256 | |
257 | return rec; | |
258 | } | |
259 | ||
260 | /* Free a record_reg record entry. */ | |
261 | ||
262 | static inline void | |
263 | record_reg_release (struct record_entry *rec) | |
264 | { | |
265 | gdb_assert (rec->type == record_reg); | |
44389f9b MS |
266 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
267 | xfree (rec->u.reg.u.ptr); | |
61f75dd8 MS |
268 | xfree (rec); |
269 | } | |
270 | ||
271 | /* Alloc a record_mem record entry. */ | |
272 | ||
273 | static inline struct record_entry * | |
274 | record_mem_alloc (CORE_ADDR addr, int len) | |
275 | { | |
276 | struct record_entry *rec; | |
277 | ||
278 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
279 | rec->type = record_mem; | |
280 | rec->u.mem.addr = addr; | |
281 | rec->u.mem.len = len; | |
44389f9b MS |
282 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
283 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
61f75dd8 MS |
284 | |
285 | return rec; | |
286 | } | |
287 | ||
288 | /* Free a record_mem record entry. */ | |
289 | ||
290 | static inline void | |
291 | record_mem_release (struct record_entry *rec) | |
292 | { | |
293 | gdb_assert (rec->type == record_mem); | |
44389f9b MS |
294 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
295 | xfree (rec->u.mem.u.ptr); | |
61f75dd8 MS |
296 | xfree (rec); |
297 | } | |
298 | ||
299 | /* Alloc a record_end record entry. */ | |
300 | ||
301 | static inline struct record_entry * | |
302 | record_end_alloc (void) | |
303 | { | |
304 | struct record_entry *rec; | |
305 | ||
306 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
307 | rec->type = record_end; | |
308 | ||
309 | return rec; | |
310 | } | |
311 | ||
312 | /* Free a record_end record entry. */ | |
313 | ||
314 | static inline void | |
315 | record_end_release (struct record_entry *rec) | |
316 | { | |
317 | xfree (rec); | |
318 | } | |
319 | ||
320 | /* Free one record entry, any type. | |
321 | Return entry->type, in case caller wants to know. */ | |
322 | ||
323 | static inline enum record_type | |
324 | record_entry_release (struct record_entry *rec) | |
325 | { | |
326 | enum record_type type = rec->type; | |
327 | ||
328 | switch (type) { | |
329 | case record_reg: | |
330 | record_reg_release (rec); | |
331 | break; | |
332 | case record_mem: | |
333 | record_mem_release (rec); | |
334 | break; | |
335 | case record_end: | |
336 | record_end_release (rec); | |
337 | break; | |
338 | } | |
339 | return type; | |
340 | } | |
341 | ||
342 | /* Free all record entries in list pointed to by REC. */ | |
343 | ||
69d05d38 HZ |
344 | static void |
345 | record_list_release (struct record_entry *rec) | |
346 | { | |
69d05d38 HZ |
347 | if (!rec) |
348 | return; | |
349 | ||
350 | while (rec->next) | |
61f75dd8 | 351 | rec = rec->next; |
69d05d38 HZ |
352 | |
353 | while (rec->prev) | |
354 | { | |
69d05d38 | 355 | rec = rec->prev; |
61f75dd8 | 356 | record_entry_release (rec->next); |
69d05d38 HZ |
357 | } |
358 | ||
61f75dd8 MS |
359 | if (rec == &record_first) |
360 | { | |
361 | record_insn_num = 0; | |
362 | record_first.next = NULL; | |
363 | } | |
364 | else | |
365 | record_entry_release (rec); | |
69d05d38 HZ |
366 | } |
367 | ||
61f75dd8 MS |
368 | /* Free all record entries forward of the given list position. */ |
369 | ||
69d05d38 | 370 | static void |
61f75dd8 | 371 | record_list_release_following (struct record_entry *rec) |
69d05d38 | 372 | { |
69d05d38 | 373 | struct record_entry *tmp = rec->next; |
61f75dd8 | 374 | |
69d05d38 HZ |
375 | rec->next = NULL; |
376 | while (tmp) | |
377 | { | |
378 | rec = tmp->next; | |
61f75dd8 | 379 | if (record_entry_release (tmp) == record_end) |
b54295a7 MS |
380 | { |
381 | record_insn_num--; | |
382 | record_insn_count--; | |
383 | } | |
69d05d38 HZ |
384 | tmp = rec; |
385 | } | |
386 | } | |
387 | ||
265aad34 MS |
388 | /* Delete the first instruction from the beginning of the log, to make |
389 | room for adding a new instruction at the end of the log. | |
390 | ||
391 | Note -- this function does not modify record_insn_num. */ | |
392 | ||
69d05d38 HZ |
393 | static void |
394 | record_list_release_first (void) | |
395 | { | |
61f75dd8 | 396 | struct record_entry *tmp; |
69d05d38 HZ |
397 | |
398 | if (!record_first.next) | |
399 | return; | |
400 | ||
61f75dd8 | 401 | /* Loop until a record_end. */ |
69d05d38 HZ |
402 | while (1) |
403 | { | |
61f75dd8 | 404 | /* Cut record_first.next out of the linked list. */ |
69d05d38 HZ |
405 | tmp = record_first.next; |
406 | record_first.next = tmp->next; | |
61f75dd8 MS |
407 | tmp->next->prev = &record_first; |
408 | ||
409 | /* tmp is now isolated, and can be deleted. */ | |
410 | if (record_entry_release (tmp) == record_end) | |
b54295a7 | 411 | break; /* End loop at first record_end. */ |
69d05d38 HZ |
412 | |
413 | if (!record_first.next) | |
414 | { | |
415 | gdb_assert (record_insn_num == 1); | |
61f75dd8 | 416 | break; /* End loop when list is empty. */ |
69d05d38 | 417 | } |
69d05d38 | 418 | } |
69d05d38 HZ |
419 | } |
420 | ||
421 | /* Add a struct record_entry to record_arch_list. */ | |
422 | ||
423 | static void | |
424 | record_arch_list_add (struct record_entry *rec) | |
425 | { | |
426 | if (record_debug > 1) | |
427 | fprintf_unfiltered (gdb_stdlog, | |
428 | "Process record: record_arch_list_add %s.\n", | |
429 | host_address_to_string (rec)); | |
430 | ||
431 | if (record_arch_list_tail) | |
432 | { | |
433 | record_arch_list_tail->next = rec; | |
434 | rec->prev = record_arch_list_tail; | |
435 | record_arch_list_tail = rec; | |
436 | } | |
437 | else | |
438 | { | |
439 | record_arch_list_head = rec; | |
440 | record_arch_list_tail = rec; | |
441 | } | |
442 | } | |
443 | ||
44389f9b MS |
444 | /* Return the value storage location of a record entry. */ |
445 | static inline gdb_byte * | |
446 | record_get_loc (struct record_entry *rec) | |
447 | { | |
448 | switch (rec->type) { | |
449 | case record_mem: | |
450 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
451 | return rec->u.mem.u.ptr; | |
452 | else | |
453 | return rec->u.mem.u.buf; | |
454 | case record_reg: | |
455 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
456 | return rec->u.reg.u.ptr; | |
457 | else | |
458 | return rec->u.reg.u.buf; | |
459 | case record_end: | |
460 | default: | |
f3574227 | 461 | gdb_assert_not_reached ("unexpected record_entry type"); |
44389f9b MS |
462 | return NULL; |
463 | } | |
464 | } | |
465 | ||
466 | /* Record the value of a register NUM to record_arch_list. */ | |
69d05d38 HZ |
467 | |
468 | int | |
61f75dd8 | 469 | record_arch_list_add_reg (struct regcache *regcache, int regnum) |
69d05d38 HZ |
470 | { |
471 | struct record_entry *rec; | |
472 | ||
473 | if (record_debug > 1) | |
474 | fprintf_unfiltered (gdb_stdlog, | |
475 | "Process record: add register num = %d to " | |
476 | "record list.\n", | |
61f75dd8 | 477 | regnum); |
69d05d38 | 478 | |
61f75dd8 | 479 | rec = record_reg_alloc (regcache, regnum); |
69d05d38 | 480 | |
44389f9b | 481 | regcache_raw_read (regcache, regnum, record_get_loc (rec)); |
69d05d38 HZ |
482 | |
483 | record_arch_list_add (rec); | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | /* Record the value of a region of memory whose address is ADDR and | |
489 | length is LEN to record_arch_list. */ | |
490 | ||
491 | int | |
492 | record_arch_list_add_mem (CORE_ADDR addr, int len) | |
493 | { | |
494 | struct record_entry *rec; | |
495 | ||
496 | if (record_debug > 1) | |
497 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 | 498 | "Process record: add mem addr = %s len = %d to " |
69d05d38 | 499 | "record list.\n", |
5af949e3 | 500 | paddress (target_gdbarch, addr), len); |
69d05d38 | 501 | |
0df8b418 | 502 | if (!addr) /* FIXME: Why? Some arch must permit it... */ |
69d05d38 HZ |
503 | return 0; |
504 | ||
61f75dd8 | 505 | rec = record_mem_alloc (addr, len); |
69d05d38 | 506 | |
44389f9b | 507 | if (target_read_memory (addr, record_get_loc (rec), len)) |
69d05d38 HZ |
508 | { |
509 | if (record_debug) | |
510 | fprintf_unfiltered (gdb_stdlog, | |
511 | "Process record: error reading memory at " | |
5af949e3 UW |
512 | "addr = %s len = %d.\n", |
513 | paddress (target_gdbarch, addr), len); | |
61f75dd8 | 514 | record_mem_release (rec); |
69d05d38 HZ |
515 | return -1; |
516 | } | |
517 | ||
518 | record_arch_list_add (rec); | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | /* Add a record_end type struct record_entry to record_arch_list. */ | |
524 | ||
525 | int | |
526 | record_arch_list_add_end (void) | |
527 | { | |
528 | struct record_entry *rec; | |
529 | ||
530 | if (record_debug > 1) | |
531 | fprintf_unfiltered (gdb_stdlog, | |
532 | "Process record: add end to arch list.\n"); | |
533 | ||
61f75dd8 | 534 | rec = record_end_alloc (); |
a493e3e2 | 535 | rec->u.end.sigval = GDB_SIGNAL_0; |
b54295a7 | 536 | rec->u.end.insn_num = ++record_insn_count; |
69d05d38 HZ |
537 | |
538 | record_arch_list_add (rec); | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | static void | |
544 | record_check_insn_num (int set_terminal) | |
545 | { | |
546 | if (record_insn_max_num) | |
547 | { | |
548 | gdb_assert (record_insn_num <= record_insn_max_num); | |
549 | if (record_insn_num == record_insn_max_num) | |
550 | { | |
551 | /* Ask user what to do. */ | |
552 | if (record_stop_at_limit) | |
553 | { | |
554 | int q; | |
123f5f96 | 555 | |
69d05d38 HZ |
556 | if (set_terminal) |
557 | target_terminal_ours (); | |
558 | q = yquery (_("Do you want to auto delete previous execution " | |
559 | "log entries when record/replay buffer becomes " | |
560 | "full (record stop-at-limit)?")); | |
561 | if (set_terminal) | |
562 | target_terminal_inferior (); | |
563 | if (q) | |
564 | record_stop_at_limit = 0; | |
565 | else | |
0156b218 | 566 | error (_("Process record: stopped by user.")); |
69d05d38 HZ |
567 | } |
568 | } | |
569 | } | |
570 | } | |
571 | ||
0156b218 MS |
572 | static void |
573 | record_arch_list_cleanups (void *ignore) | |
574 | { | |
575 | record_list_release (record_arch_list_tail); | |
576 | } | |
577 | ||
69d05d38 HZ |
578 | /* Before inferior step (when GDB record the running message, inferior |
579 | only can step), GDB will call this function to record the values to | |
580 | record_list. This function will call gdbarch_process_record to | |
581 | record the running message of inferior and set them to | |
582 | record_arch_list, and add it to record_list. */ | |
583 | ||
69d05d38 | 584 | static int |
2ea28649 | 585 | record_message (struct regcache *regcache, enum gdb_signal signal) |
69d05d38 HZ |
586 | { |
587 | int ret; | |
e6a386cd | 588 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
0156b218 | 589 | struct cleanup *old_cleanups = make_cleanup (record_arch_list_cleanups, 0); |
69d05d38 HZ |
590 | |
591 | record_arch_list_head = NULL; | |
592 | record_arch_list_tail = NULL; | |
593 | ||
594 | /* Check record_insn_num. */ | |
595 | record_check_insn_num (1); | |
596 | ||
8b739a96 HZ |
597 | /* If gdb sends a signal value to target_resume, |
598 | save it in the 'end' field of the previous instruction. | |
599 | ||
600 | Maybe process record should record what really happened, | |
601 | rather than what gdb pretends has happened. | |
602 | ||
603 | So if Linux delivered the signal to the child process during | |
604 | the record mode, we will record it and deliver it again in | |
605 | the replay mode. | |
606 | ||
607 | If user says "ignore this signal" during the record mode, then | |
608 | it will be ignored again during the replay mode (no matter if | |
609 | the user says something different, like "deliver this signal" | |
610 | during the replay mode). | |
611 | ||
612 | User should understand that nothing he does during the replay | |
613 | mode will change the behavior of the child. If he tries, | |
614 | then that is a user error. | |
615 | ||
616 | But we should still deliver the signal to gdb during the replay, | |
617 | if we delivered it during the recording. Therefore we should | |
618 | record the signal during record_wait, not record_resume. */ | |
619 | if (record_list != &record_first) /* FIXME better way to check */ | |
620 | { | |
621 | gdb_assert (record_list->type == record_end); | |
e6a386cd | 622 | record_list->u.end.sigval = signal; |
8b739a96 HZ |
623 | } |
624 | ||
a493e3e2 | 625 | if (signal == GDB_SIGNAL_0 |
8b739a96 HZ |
626 | || !gdbarch_process_record_signal_p (gdbarch)) |
627 | ret = gdbarch_process_record (gdbarch, | |
e6a386cd HZ |
628 | regcache, |
629 | regcache_read_pc (regcache)); | |
8b739a96 HZ |
630 | else |
631 | ret = gdbarch_process_record_signal (gdbarch, | |
e6a386cd HZ |
632 | regcache, |
633 | signal); | |
8b739a96 | 634 | |
69d05d38 HZ |
635 | if (ret > 0) |
636 | error (_("Process record: inferior program stopped.")); | |
637 | if (ret < 0) | |
638 | error (_("Process record: failed to record execution log.")); | |
639 | ||
640 | discard_cleanups (old_cleanups); | |
641 | ||
642 | record_list->next = record_arch_list_head; | |
643 | record_arch_list_head->prev = record_list; | |
644 | record_list = record_arch_list_tail; | |
645 | ||
646 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
647 | record_list_release_first (); | |
648 | else | |
649 | record_insn_num++; | |
650 | ||
651 | return 1; | |
652 | } | |
653 | ||
e6a386cd HZ |
654 | struct record_message_args { |
655 | struct regcache *regcache; | |
2ea28649 | 656 | enum gdb_signal signal; |
e6a386cd HZ |
657 | }; |
658 | ||
69d05d38 | 659 | static int |
e6a386cd HZ |
660 | record_message_wrapper (void *args) |
661 | { | |
662 | struct record_message_args *record_args = args; | |
663 | ||
664 | return record_message (record_args->regcache, record_args->signal); | |
665 | } | |
666 | ||
667 | static int | |
668 | record_message_wrapper_safe (struct regcache *regcache, | |
2ea28649 | 669 | enum gdb_signal signal) |
69d05d38 | 670 | { |
8b739a96 HZ |
671 | struct record_message_args args; |
672 | ||
673 | args.regcache = regcache; | |
674 | args.signal = signal; | |
e6a386cd HZ |
675 | |
676 | return catch_errors (record_message_wrapper, &args, NULL, RETURN_MASK_ALL); | |
69d05d38 HZ |
677 | } |
678 | ||
679 | /* Set to 1 if record_store_registers and record_xfer_partial | |
680 | doesn't need record. */ | |
681 | ||
682 | static int record_gdb_operation_disable = 0; | |
683 | ||
684 | struct cleanup * | |
685 | record_gdb_operation_disable_set (void) | |
686 | { | |
687 | struct cleanup *old_cleanups = NULL; | |
688 | ||
689 | old_cleanups = | |
690 | make_cleanup_restore_integer (&record_gdb_operation_disable); | |
691 | record_gdb_operation_disable = 1; | |
692 | ||
693 | return old_cleanups; | |
694 | } | |
695 | ||
9093389c PA |
696 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ |
697 | static int record_hw_watchpoint = 0; | |
698 | ||
90ca0479 MS |
699 | /* Execute one instruction from the record log. Each instruction in |
700 | the log will be represented by an arbitrary sequence of register | |
701 | entries and memory entries, followed by an 'end' entry. */ | |
702 | ||
703 | static inline void | |
704 | record_exec_insn (struct regcache *regcache, struct gdbarch *gdbarch, | |
705 | struct record_entry *entry) | |
706 | { | |
707 | switch (entry->type) | |
708 | { | |
709 | case record_reg: /* reg */ | |
710 | { | |
711 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
712 | ||
713 | if (record_debug > 1) | |
714 | fprintf_unfiltered (gdb_stdlog, | |
715 | "Process record: record_reg %s to " | |
716 | "inferior num = %d.\n", | |
717 | host_address_to_string (entry), | |
718 | entry->u.reg.num); | |
719 | ||
720 | regcache_cooked_read (regcache, entry->u.reg.num, reg); | |
721 | regcache_cooked_write (regcache, entry->u.reg.num, | |
722 | record_get_loc (entry)); | |
723 | memcpy (record_get_loc (entry), reg, entry->u.reg.len); | |
724 | } | |
725 | break; | |
726 | ||
727 | case record_mem: /* mem */ | |
728 | { | |
729 | /* Nothing to do if the entry is flagged not_accessible. */ | |
730 | if (!entry->u.mem.mem_entry_not_accessible) | |
731 | { | |
732 | gdb_byte *mem = alloca (entry->u.mem.len); | |
733 | ||
734 | if (record_debug > 1) | |
735 | fprintf_unfiltered (gdb_stdlog, | |
736 | "Process record: record_mem %s to " | |
737 | "inferior addr = %s len = %d.\n", | |
738 | host_address_to_string (entry), | |
739 | paddress (gdbarch, entry->u.mem.addr), | |
740 | entry->u.mem.len); | |
741 | ||
742 | if (target_read_memory (entry->u.mem.addr, mem, entry->u.mem.len)) | |
743 | { | |
744 | entry->u.mem.mem_entry_not_accessible = 1; | |
745 | if (record_debug) | |
7ea6d463 PM |
746 | warning (_("Process record: error reading memory at " |
747 | "addr = %s len = %d."), | |
90ca0479 MS |
748 | paddress (gdbarch, entry->u.mem.addr), |
749 | entry->u.mem.len); | |
750 | } | |
751 | else | |
752 | { | |
753 | if (target_write_memory (entry->u.mem.addr, | |
754 | record_get_loc (entry), | |
755 | entry->u.mem.len)) | |
756 | { | |
757 | entry->u.mem.mem_entry_not_accessible = 1; | |
758 | if (record_debug) | |
7ea6d463 PM |
759 | warning (_("Process record: error writing memory at " |
760 | "addr = %s len = %d."), | |
90ca0479 MS |
761 | paddress (gdbarch, entry->u.mem.addr), |
762 | entry->u.mem.len); | |
763 | } | |
764 | else | |
9093389c PA |
765 | { |
766 | memcpy (record_get_loc (entry), mem, entry->u.mem.len); | |
767 | ||
768 | /* We've changed memory --- check if a hardware | |
769 | watchpoint should trap. Note that this | |
770 | presently assumes the target beneath supports | |
771 | continuable watchpoints. On non-continuable | |
772 | watchpoints target, we'll want to check this | |
773 | _before_ actually doing the memory change, and | |
774 | not doing the change at all if the watchpoint | |
775 | traps. */ | |
776 | if (hardware_watchpoint_inserted_in_range | |
777 | (get_regcache_aspace (regcache), | |
778 | entry->u.mem.addr, entry->u.mem.len)) | |
779 | record_hw_watchpoint = 1; | |
780 | } | |
90ca0479 MS |
781 | } |
782 | } | |
783 | } | |
784 | break; | |
785 | } | |
786 | } | |
787 | ||
27699eea MS |
788 | static struct target_ops *tmp_to_resume_ops; |
789 | static void (*tmp_to_resume) (struct target_ops *, ptid_t, int, | |
2ea28649 | 790 | enum gdb_signal); |
27699eea MS |
791 | static struct target_ops *tmp_to_wait_ops; |
792 | static ptid_t (*tmp_to_wait) (struct target_ops *, ptid_t, | |
793 | struct target_waitstatus *, | |
794 | int); | |
795 | static struct target_ops *tmp_to_store_registers_ops; | |
796 | static void (*tmp_to_store_registers) (struct target_ops *, | |
797 | struct regcache *, | |
798 | int regno); | |
799 | static struct target_ops *tmp_to_xfer_partial_ops; | |
800 | static LONGEST (*tmp_to_xfer_partial) (struct target_ops *ops, | |
801 | enum target_object object, | |
802 | const char *annex, | |
803 | gdb_byte *readbuf, | |
804 | const gdb_byte *writebuf, | |
805 | ULONGEST offset, | |
806 | LONGEST len); | |
807 | static int (*tmp_to_insert_breakpoint) (struct gdbarch *, | |
808 | struct bp_target_info *); | |
809 | static int (*tmp_to_remove_breakpoint) (struct gdbarch *, | |
810 | struct bp_target_info *); | |
9093389c PA |
811 | static int (*tmp_to_stopped_by_watchpoint) (void); |
812 | static int (*tmp_to_stopped_data_address) (struct target_ops *, CORE_ADDR *); | |
32231432 PA |
813 | static int (*tmp_to_stopped_data_address) (struct target_ops *, CORE_ADDR *); |
814 | static void (*tmp_to_async) (void (*) (enum inferior_event_type, void *), void *); | |
27699eea | 815 | |
0156b218 MS |
816 | static void record_restore (void); |
817 | ||
32231432 PA |
818 | /* Asynchronous signal handle registered as event loop source for when |
819 | we have pending events ready to be passed to the core. */ | |
820 | ||
821 | static struct async_event_handler *record_async_inferior_event_token; | |
822 | ||
823 | static void | |
824 | record_async_inferior_event_handler (gdb_client_data data) | |
825 | { | |
826 | inferior_event_handler (INF_REG_EVENT, NULL); | |
827 | } | |
828 | ||
27699eea | 829 | /* Open the process record target. */ |
6df67667 | 830 | |
69d05d38 | 831 | static void |
27699eea MS |
832 | record_core_open_1 (char *name, int from_tty) |
833 | { | |
834 | struct regcache *regcache = get_current_regcache (); | |
835 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
836 | int i; | |
837 | ||
838 | /* Get record_core_regbuf. */ | |
839 | target_fetch_registers (regcache, -1); | |
840 | record_core_regbuf = xmalloc (MAX_REGISTER_SIZE * regnum); | |
841 | for (i = 0; i < regnum; i ++) | |
842 | regcache_raw_collect (regcache, i, | |
843 | record_core_regbuf + MAX_REGISTER_SIZE * i); | |
844 | ||
845 | /* Get record_core_start and record_core_end. */ | |
846 | if (build_section_table (core_bfd, &record_core_start, &record_core_end)) | |
847 | { | |
848 | xfree (record_core_regbuf); | |
849 | record_core_regbuf = NULL; | |
850 | error (_("\"%s\": Can't find sections: %s"), | |
851 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
852 | } | |
853 | ||
854 | push_target (&record_core_ops); | |
0156b218 | 855 | record_restore (); |
27699eea MS |
856 | } |
857 | ||
858 | /* "to_open" target method for 'live' processes. */ | |
859 | ||
860 | static void | |
861 | record_open_1 (char *name, int from_tty) | |
69d05d38 | 862 | { |
69d05d38 HZ |
863 | if (record_debug) |
864 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
865 | ||
866 | /* check exec */ | |
867 | if (!target_has_execution) | |
868 | error (_("Process record: the program is not being run.")); | |
869 | if (non_stop) | |
870 | error (_("Process record target can't debug inferior in non-stop mode " | |
871 | "(non-stop).")); | |
69d05d38 | 872 | |
a97b0ac8 | 873 | if (!gdbarch_process_record_p (target_gdbarch)) |
69d05d38 HZ |
874 | error (_("Process record: the current architecture doesn't support " |
875 | "record function.")); | |
876 | ||
27699eea MS |
877 | if (!tmp_to_resume) |
878 | error (_("Could not find 'to_resume' method on the target stack.")); | |
879 | if (!tmp_to_wait) | |
880 | error (_("Could not find 'to_wait' method on the target stack.")); | |
881 | if (!tmp_to_store_registers) | |
3e43a32a MS |
882 | error (_("Could not find 'to_store_registers' " |
883 | "method on the target stack.")); | |
27699eea | 884 | if (!tmp_to_insert_breakpoint) |
3e43a32a MS |
885 | error (_("Could not find 'to_insert_breakpoint' " |
886 | "method on the target stack.")); | |
27699eea | 887 | if (!tmp_to_remove_breakpoint) |
3e43a32a MS |
888 | error (_("Could not find 'to_remove_breakpoint' " |
889 | "method on the target stack.")); | |
7155de5a | 890 | if (!tmp_to_stopped_by_watchpoint) |
3e43a32a MS |
891 | error (_("Could not find 'to_stopped_by_watchpoint' " |
892 | "method on the target stack.")); | |
7155de5a | 893 | if (!tmp_to_stopped_data_address) |
3e43a32a MS |
894 | error (_("Could not find 'to_stopped_data_address' " |
895 | "method on the target stack.")); | |
27699eea MS |
896 | |
897 | push_target (&record_ops); | |
898 | } | |
899 | ||
20388dd6 YQ |
900 | static void record_init_record_breakpoints (void); |
901 | ||
27699eea MS |
902 | /* "to_open" target method. Open the process record target. */ |
903 | ||
904 | static void | |
905 | record_open (char *name, int from_tty) | |
906 | { | |
907 | struct target_ops *t; | |
908 | ||
909 | if (record_debug) | |
910 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
911 | ||
69d05d38 HZ |
912 | /* Check if record target is already running. */ |
913 | if (current_target.to_stratum == record_stratum) | |
5d40bb85 HZ |
914 | error (_("Process record target already running. Use \"record stop\" to " |
915 | "stop record target first.")); | |
69d05d38 | 916 | |
27699eea MS |
917 | /* Reset the tmp beneath pointers. */ |
918 | tmp_to_resume_ops = NULL; | |
919 | tmp_to_resume = NULL; | |
920 | tmp_to_wait_ops = NULL; | |
921 | tmp_to_wait = NULL; | |
922 | tmp_to_store_registers_ops = NULL; | |
923 | tmp_to_store_registers = NULL; | |
924 | tmp_to_xfer_partial_ops = NULL; | |
925 | tmp_to_xfer_partial = NULL; | |
926 | tmp_to_insert_breakpoint = NULL; | |
927 | tmp_to_remove_breakpoint = NULL; | |
7155de5a HZ |
928 | tmp_to_stopped_by_watchpoint = NULL; |
929 | tmp_to_stopped_data_address = NULL; | |
32231432 | 930 | tmp_to_async = NULL; |
69d05d38 HZ |
931 | |
932 | /* Set the beneath function pointers. */ | |
933 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
934 | { | |
27699eea | 935 | if (!tmp_to_resume) |
69d05d38 | 936 | { |
27699eea MS |
937 | tmp_to_resume = t->to_resume; |
938 | tmp_to_resume_ops = t; | |
69d05d38 | 939 | } |
27699eea | 940 | if (!tmp_to_wait) |
69d05d38 | 941 | { |
27699eea MS |
942 | tmp_to_wait = t->to_wait; |
943 | tmp_to_wait_ops = t; | |
69d05d38 | 944 | } |
27699eea | 945 | if (!tmp_to_store_registers) |
69d05d38 | 946 | { |
27699eea MS |
947 | tmp_to_store_registers = t->to_store_registers; |
948 | tmp_to_store_registers_ops = t; | |
69d05d38 | 949 | } |
27699eea | 950 | if (!tmp_to_xfer_partial) |
69d05d38 | 951 | { |
27699eea MS |
952 | tmp_to_xfer_partial = t->to_xfer_partial; |
953 | tmp_to_xfer_partial_ops = t; | |
69d05d38 | 954 | } |
27699eea MS |
955 | if (!tmp_to_insert_breakpoint) |
956 | tmp_to_insert_breakpoint = t->to_insert_breakpoint; | |
957 | if (!tmp_to_remove_breakpoint) | |
958 | tmp_to_remove_breakpoint = t->to_remove_breakpoint; | |
9093389c PA |
959 | if (!tmp_to_stopped_by_watchpoint) |
960 | tmp_to_stopped_by_watchpoint = t->to_stopped_by_watchpoint; | |
961 | if (!tmp_to_stopped_data_address) | |
962 | tmp_to_stopped_data_address = t->to_stopped_data_address; | |
32231432 PA |
963 | if (!tmp_to_async) |
964 | tmp_to_async = t->to_async; | |
69d05d38 | 965 | } |
27699eea MS |
966 | if (!tmp_to_xfer_partial) |
967 | error (_("Could not find 'to_xfer_partial' method on the target stack.")); | |
69d05d38 HZ |
968 | |
969 | /* Reset */ | |
970 | record_insn_num = 0; | |
b54295a7 | 971 | record_insn_count = 0; |
69d05d38 HZ |
972 | record_list = &record_first; |
973 | record_list->next = NULL; | |
27699eea MS |
974 | |
975 | /* Set the tmp beneath pointers to beneath pointers. */ | |
976 | record_beneath_to_resume_ops = tmp_to_resume_ops; | |
977 | record_beneath_to_resume = tmp_to_resume; | |
978 | record_beneath_to_wait_ops = tmp_to_wait_ops; | |
979 | record_beneath_to_wait = tmp_to_wait; | |
980 | record_beneath_to_store_registers_ops = tmp_to_store_registers_ops; | |
981 | record_beneath_to_store_registers = tmp_to_store_registers; | |
982 | record_beneath_to_xfer_partial_ops = tmp_to_xfer_partial_ops; | |
983 | record_beneath_to_xfer_partial = tmp_to_xfer_partial; | |
984 | record_beneath_to_insert_breakpoint = tmp_to_insert_breakpoint; | |
985 | record_beneath_to_remove_breakpoint = tmp_to_remove_breakpoint; | |
9093389c PA |
986 | record_beneath_to_stopped_by_watchpoint = tmp_to_stopped_by_watchpoint; |
987 | record_beneath_to_stopped_data_address = tmp_to_stopped_data_address; | |
32231432 | 988 | record_beneath_to_async = tmp_to_async; |
27699eea | 989 | |
c0edd9ed | 990 | if (core_bfd) |
27699eea MS |
991 | record_core_open_1 (name, from_tty); |
992 | else | |
993 | record_open_1 (name, from_tty); | |
32231432 PA |
994 | |
995 | /* Register extra event sources in the event loop. */ | |
996 | record_async_inferior_event_token | |
997 | = create_async_event_handler (record_async_inferior_event_handler, | |
998 | NULL); | |
20388dd6 YQ |
999 | |
1000 | record_init_record_breakpoints (); | |
69d05d38 HZ |
1001 | } |
1002 | ||
6df67667 MS |
1003 | /* "to_close" target method. Close the process record target. */ |
1004 | ||
69d05d38 HZ |
1005 | static void |
1006 | record_close (int quitting) | |
1007 | { | |
27699eea MS |
1008 | struct record_core_buf_entry *entry; |
1009 | ||
69d05d38 HZ |
1010 | if (record_debug) |
1011 | fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n"); | |
1012 | ||
1013 | record_list_release (record_list); | |
27699eea MS |
1014 | |
1015 | /* Release record_core_regbuf. */ | |
1016 | if (record_core_regbuf) | |
1017 | { | |
1018 | xfree (record_core_regbuf); | |
1019 | record_core_regbuf = NULL; | |
1020 | } | |
1021 | ||
1022 | /* Release record_core_buf_list. */ | |
1023 | if (record_core_buf_list) | |
1024 | { | |
1025 | for (entry = record_core_buf_list->prev; entry; entry = entry->prev) | |
1026 | { | |
1027 | xfree (record_core_buf_list); | |
1028 | record_core_buf_list = entry; | |
1029 | } | |
1030 | record_core_buf_list = NULL; | |
1031 | } | |
32231432 PA |
1032 | |
1033 | if (record_async_inferior_event_token) | |
1034 | delete_async_event_handler (&record_async_inferior_event_token); | |
69d05d38 HZ |
1035 | } |
1036 | ||
1037 | static int record_resume_step = 0; | |
69d05d38 | 1038 | |
32231432 PA |
1039 | /* True if we've been resumed, and so each record_wait call should |
1040 | advance execution. If this is false, record_wait will return a | |
1041 | TARGET_WAITKIND_IGNORE. */ | |
1042 | static int record_resumed = 0; | |
1043 | ||
1044 | /* The execution direction of the last resume we got. This is | |
1045 | necessary for async mode. Vis (order is not strictly accurate): | |
1046 | ||
1047 | 1. user has the global execution direction set to forward | |
1048 | 2. user does a reverse-step command | |
1049 | 3. record_resume is called with global execution direction | |
1050 | temporarily switched to reverse | |
1051 | 4. GDB's execution direction is reverted back to forward | |
1052 | 5. target record notifies event loop there's an event to handle | |
1053 | 6. infrun asks the target which direction was it going, and switches | |
1054 | the global execution direction accordingly (to reverse) | |
1055 | 7. infrun polls an event out of the record target, and handles it | |
1056 | 8. GDB goes back to the event loop, and goto #4. | |
1057 | */ | |
1058 | static enum exec_direction_kind record_execution_dir = EXEC_FORWARD; | |
1059 | ||
6df67667 MS |
1060 | /* "to_resume" target method. Resume the process record target. */ |
1061 | ||
69d05d38 HZ |
1062 | static void |
1063 | record_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1064 | enum gdb_signal signal) |
69d05d38 HZ |
1065 | { |
1066 | record_resume_step = step; | |
32231432 PA |
1067 | record_resumed = 1; |
1068 | record_execution_dir = execution_direction; | |
69d05d38 HZ |
1069 | |
1070 | if (!RECORD_IS_REPLAY) | |
1071 | { | |
f02253f1 HZ |
1072 | struct gdbarch *gdbarch = target_thread_architecture (ptid); |
1073 | ||
e6a386cd | 1074 | record_message (get_current_regcache (), signal); |
f02253f1 HZ |
1075 | |
1076 | if (!step) | |
1077 | { | |
1078 | /* This is not hard single step. */ | |
1079 | if (!gdbarch_software_single_step_p (gdbarch)) | |
1080 | { | |
1081 | /* This is a normal continue. */ | |
1082 | step = 1; | |
1083 | } | |
1084 | else | |
1085 | { | |
1086 | /* This arch support soft sigle step. */ | |
1087 | if (single_step_breakpoints_inserted ()) | |
1088 | { | |
1089 | /* This is a soft single step. */ | |
1090 | record_resume_step = 1; | |
1091 | } | |
1092 | else | |
1093 | { | |
1094 | /* This is a continue. | |
1095 | Try to insert a soft single step breakpoint. */ | |
1096 | if (!gdbarch_software_single_step (gdbarch, | |
1097 | get_current_frame ())) | |
1098 | { | |
1099 | /* This system don't want use soft single step. | |
1100 | Use hard sigle step. */ | |
1101 | step = 1; | |
1102 | } | |
1103 | } | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | record_beneath_to_resume (record_beneath_to_resume_ops, | |
1108 | ptid, step, signal); | |
69d05d38 | 1109 | } |
32231432 PA |
1110 | |
1111 | /* We are about to start executing the inferior (or simulate it), | |
1112 | let's register it with the event loop. */ | |
1113 | if (target_can_async_p ()) | |
1114 | { | |
1115 | target_async (inferior_event_handler, 0); | |
1116 | /* Notify the event loop there's an event to wait for. We do | |
1117 | most of the work in record_wait. */ | |
1118 | mark_async_event_handler (record_async_inferior_event_token); | |
1119 | } | |
69d05d38 HZ |
1120 | } |
1121 | ||
1122 | static int record_get_sig = 0; | |
1123 | ||
6df67667 MS |
1124 | /* SIGINT signal handler, registered by "to_wait" method. */ |
1125 | ||
69d05d38 HZ |
1126 | static void |
1127 | record_sig_handler (int signo) | |
1128 | { | |
1129 | if (record_debug) | |
1130 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1131 | ||
1132 | /* It will break the running inferior in replay mode. */ | |
1133 | record_resume_step = 1; | |
1134 | ||
1135 | /* It will let record_wait set inferior status to get the signal | |
1136 | SIGINT. */ | |
1137 | record_get_sig = 1; | |
1138 | } | |
1139 | ||
1140 | static void | |
1141 | record_wait_cleanups (void *ignore) | |
1142 | { | |
1143 | if (execution_direction == EXEC_REVERSE) | |
1144 | { | |
1145 | if (record_list->next) | |
1146 | record_list = record_list->next; | |
1147 | } | |
1148 | else | |
1149 | record_list = record_list->prev; | |
1150 | } | |
1151 | ||
6df67667 MS |
1152 | /* "to_wait" target method for process record target. |
1153 | ||
1154 | In record mode, the target is always run in singlestep mode | |
1155 | (even when gdb says to continue). The to_wait method intercepts | |
1156 | the stop events and determines which ones are to be passed on to | |
1157 | gdb. Most stop events are just singlestep events that gdb is not | |
1158 | to know about, so the to_wait method just records them and keeps | |
1159 | singlestepping. | |
1160 | ||
1161 | In replay mode, this function emulates the recorded execution log, | |
1162 | one instruction at a time (forward or backward), and determines | |
1163 | where to stop. */ | |
69d05d38 HZ |
1164 | |
1165 | static ptid_t | |
32231432 PA |
1166 | record_wait_1 (struct target_ops *ops, |
1167 | ptid_t ptid, struct target_waitstatus *status, | |
1168 | int options) | |
69d05d38 HZ |
1169 | { |
1170 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
1171 | ||
1172 | if (record_debug) | |
1173 | fprintf_unfiltered (gdb_stdlog, | |
1174 | "Process record: record_wait " | |
32231432 PA |
1175 | "record_resume_step = %d, record_resumed = %d, direction=%s\n", |
1176 | record_resume_step, record_resumed, | |
1177 | record_execution_dir == EXEC_FORWARD ? "forward" : "reverse"); | |
1178 | ||
1179 | if (!record_resumed) | |
1180 | { | |
1181 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1182 | ||
1183 | /* No interesting event. */ | |
1184 | status->kind = TARGET_WAITKIND_IGNORE; | |
1185 | return minus_one_ptid; | |
1186 | } | |
69d05d38 | 1187 | |
eaaffdf4 HZ |
1188 | record_get_sig = 0; |
1189 | signal (SIGINT, record_sig_handler); | |
1190 | ||
27699eea | 1191 | if (!RECORD_IS_REPLAY && ops != &record_core_ops) |
69d05d38 | 1192 | { |
69d05d38 HZ |
1193 | if (record_resume_step) |
1194 | { | |
1195 | /* This is a single step. */ | |
1196 | return record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 1197 | ptid, status, options); |
69d05d38 HZ |
1198 | } |
1199 | else | |
1200 | { | |
1201 | /* This is not a single step. */ | |
1202 | ptid_t ret; | |
1203 | CORE_ADDR tmp_pc; | |
f02253f1 | 1204 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); |
69d05d38 HZ |
1205 | |
1206 | while (1) | |
1207 | { | |
1208 | ret = record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 1209 | ptid, status, options); |
32231432 PA |
1210 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1211 | { | |
1212 | if (record_debug) | |
1213 | fprintf_unfiltered (gdb_stdlog, | |
1214 | "Process record: record_wait " | |
1215 | "target beneath not done yet\n"); | |
1216 | return ret; | |
1217 | } | |
69d05d38 | 1218 | |
f02253f1 HZ |
1219 | if (single_step_breakpoints_inserted ()) |
1220 | remove_single_step_breakpoints (); | |
1221 | ||
eaaffdf4 | 1222 | if (record_resume_step) |
32231432 | 1223 | return ret; |
eaaffdf4 | 1224 | |
8b739a96 | 1225 | /* Is this a SIGTRAP? */ |
69d05d38 | 1226 | if (status->kind == TARGET_WAITKIND_STOPPED |
a493e3e2 | 1227 | && status->value.sig == GDB_SIGNAL_TRAP) |
69d05d38 | 1228 | { |
6c95b8df | 1229 | struct regcache *regcache; |
a9840291 | 1230 | struct address_space *aspace; |
6c95b8df | 1231 | |
9093389c PA |
1232 | /* Yes -- this is likely our single-step finishing, |
1233 | but check if there's any reason the core would be | |
1234 | interested in the event. */ | |
1235 | ||
69d05d38 | 1236 | registers_changed (); |
6c95b8df PA |
1237 | regcache = get_current_regcache (); |
1238 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1239 | aspace = get_regcache_aspace (regcache); |
9093389c PA |
1240 | |
1241 | if (target_stopped_by_watchpoint ()) | |
1242 | { | |
1243 | /* Always interested in watchpoints. */ | |
1244 | } | |
a9840291 | 1245 | else if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1246 | { |
9093389c PA |
1247 | /* There is a breakpoint here. Let the core |
1248 | handle it. */ | |
a9840291 PA |
1249 | if (software_breakpoint_inserted_here_p (aspace, tmp_pc)) |
1250 | { | |
3e43a32a MS |
1251 | struct gdbarch *gdbarch |
1252 | = get_regcache_arch (regcache); | |
a9840291 PA |
1253 | CORE_ADDR decr_pc_after_break |
1254 | = gdbarch_decr_pc_after_break (gdbarch); | |
1255 | if (decr_pc_after_break) | |
1256 | regcache_write_pc (regcache, | |
1257 | tmp_pc + decr_pc_after_break); | |
1258 | } | |
69d05d38 HZ |
1259 | } |
1260 | else | |
1261 | { | |
f02253f1 HZ |
1262 | /* This is a single-step trap. Record the |
1263 | insn and issue another step. | |
1264 | FIXME: this part can be a random SIGTRAP too. | |
1265 | But GDB cannot handle it. */ | |
1266 | int step = 1; | |
1267 | ||
e6a386cd | 1268 | if (!record_message_wrapper_safe (regcache, |
a493e3e2 | 1269 | GDB_SIGNAL_0)) |
e6a386cd HZ |
1270 | { |
1271 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1272 | status->value.sig = GDB_SIGNAL_0; |
e6a386cd HZ |
1273 | break; |
1274 | } | |
6c95b8df | 1275 | |
f02253f1 HZ |
1276 | if (gdbarch_software_single_step_p (gdbarch)) |
1277 | { | |
1278 | /* Try to insert the software single step breakpoint. | |
1279 | If insert success, set step to 0. */ | |
1280 | set_executing (inferior_ptid, 0); | |
1281 | reinit_frame_cache (); | |
1282 | if (gdbarch_software_single_step (gdbarch, | |
1283 | get_current_frame ())) | |
1284 | step = 0; | |
1285 | set_executing (inferior_ptid, 1); | |
1286 | } | |
1287 | ||
32231432 PA |
1288 | if (record_debug) |
1289 | fprintf_unfiltered (gdb_stdlog, | |
1290 | "Process record: record_wait " | |
1291 | "issuing one more step in the target beneath\n"); | |
69d05d38 | 1292 | record_beneath_to_resume (record_beneath_to_resume_ops, |
f02253f1 | 1293 | ptid, step, |
a493e3e2 | 1294 | GDB_SIGNAL_0); |
69d05d38 HZ |
1295 | continue; |
1296 | } | |
1297 | } | |
1298 | ||
1299 | /* The inferior is broken by a breakpoint or a signal. */ | |
1300 | break; | |
1301 | } | |
1302 | ||
1303 | return ret; | |
1304 | } | |
1305 | } | |
1306 | else | |
1307 | { | |
1308 | struct regcache *regcache = get_current_regcache (); | |
5af949e3 | 1309 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
a9840291 | 1310 | struct address_space *aspace = get_regcache_aspace (regcache); |
69d05d38 HZ |
1311 | int continue_flag = 1; |
1312 | int first_record_end = 1; | |
1313 | struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0); | |
1314 | CORE_ADDR tmp_pc; | |
1315 | ||
9093389c | 1316 | record_hw_watchpoint = 0; |
69d05d38 HZ |
1317 | status->kind = TARGET_WAITKIND_STOPPED; |
1318 | ||
1319 | /* Check breakpoint when forward execute. */ | |
1320 | if (execution_direction == EXEC_FORWARD) | |
1321 | { | |
1322 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1323 | if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1324 | { |
a9840291 PA |
1325 | int decr_pc_after_break = gdbarch_decr_pc_after_break (gdbarch); |
1326 | ||
69d05d38 HZ |
1327 | if (record_debug) |
1328 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 UW |
1329 | "Process record: break at %s.\n", |
1330 | paddress (gdbarch, tmp_pc)); | |
a9840291 PA |
1331 | |
1332 | if (decr_pc_after_break | |
1333 | && !record_resume_step | |
1334 | && software_breakpoint_inserted_here_p (aspace, tmp_pc)) | |
69d05d38 | 1335 | regcache_write_pc (regcache, |
a9840291 | 1336 | tmp_pc + decr_pc_after_break); |
69d05d38 HZ |
1337 | goto replay_out; |
1338 | } | |
1339 | } | |
1340 | ||
69d05d38 HZ |
1341 | /* If GDB is in terminal_inferior mode, it will not get the signal. |
1342 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1343 | mode, because inferior will not executed. | |
1344 | Then set it to terminal_ours to make GDB get the signal. */ | |
1345 | target_terminal_ours (); | |
1346 | ||
1347 | /* In EXEC_FORWARD mode, record_list points to the tail of prev | |
1348 | instruction. */ | |
1349 | if (execution_direction == EXEC_FORWARD && record_list->next) | |
1350 | record_list = record_list->next; | |
1351 | ||
1352 | /* Loop over the record_list, looking for the next place to | |
1353 | stop. */ | |
1354 | do | |
1355 | { | |
1356 | /* Check for beginning and end of log. */ | |
1357 | if (execution_direction == EXEC_REVERSE | |
1358 | && record_list == &record_first) | |
1359 | { | |
1360 | /* Hit beginning of record log in reverse. */ | |
1361 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1362 | break; | |
1363 | } | |
1364 | if (execution_direction != EXEC_REVERSE && !record_list->next) | |
1365 | { | |
1366 | /* Hit end of record log going forward. */ | |
1367 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1368 | break; | |
1369 | } | |
1370 | ||
90ca0479 MS |
1371 | record_exec_insn (regcache, gdbarch, record_list); |
1372 | ||
1373 | if (record_list->type == record_end) | |
69d05d38 HZ |
1374 | { |
1375 | if (record_debug > 1) | |
1376 | fprintf_unfiltered (gdb_stdlog, | |
1377 | "Process record: record_end %s to " | |
1378 | "inferior.\n", | |
1379 | host_address_to_string (record_list)); | |
1380 | ||
1381 | if (first_record_end && execution_direction == EXEC_REVERSE) | |
1382 | { | |
1383 | /* When reverse excute, the first record_end is the part of | |
1384 | current instruction. */ | |
1385 | first_record_end = 0; | |
1386 | } | |
1387 | else | |
1388 | { | |
1389 | /* In EXEC_REVERSE mode, this is the record_end of prev | |
1390 | instruction. | |
1391 | In EXEC_FORWARD mode, this is the record_end of current | |
1392 | instruction. */ | |
1393 | /* step */ | |
1394 | if (record_resume_step) | |
1395 | { | |
1396 | if (record_debug > 1) | |
1397 | fprintf_unfiltered (gdb_stdlog, | |
1398 | "Process record: step.\n"); | |
1399 | continue_flag = 0; | |
1400 | } | |
1401 | ||
1402 | /* check breakpoint */ | |
1403 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1404 | if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1405 | { |
a9840291 PA |
1406 | int decr_pc_after_break |
1407 | = gdbarch_decr_pc_after_break (gdbarch); | |
1408 | ||
69d05d38 HZ |
1409 | if (record_debug) |
1410 | fprintf_unfiltered (gdb_stdlog, | |
1411 | "Process record: break " | |
5af949e3 UW |
1412 | "at %s.\n", |
1413 | paddress (gdbarch, tmp_pc)); | |
a9840291 | 1414 | if (decr_pc_after_break |
69d05d38 | 1415 | && execution_direction == EXEC_FORWARD |
a9840291 PA |
1416 | && !record_resume_step |
1417 | && software_breakpoint_inserted_here_p (aspace, | |
1418 | tmp_pc)) | |
69d05d38 | 1419 | regcache_write_pc (regcache, |
a9840291 | 1420 | tmp_pc + decr_pc_after_break); |
69d05d38 HZ |
1421 | continue_flag = 0; |
1422 | } | |
9093389c PA |
1423 | |
1424 | if (record_hw_watchpoint) | |
1425 | { | |
1426 | if (record_debug) | |
3e43a32a MS |
1427 | fprintf_unfiltered (gdb_stdlog, |
1428 | "Process record: hit hw " | |
1429 | "watchpoint.\n"); | |
9093389c PA |
1430 | continue_flag = 0; |
1431 | } | |
8b739a96 | 1432 | /* Check target signal */ |
a493e3e2 | 1433 | if (record_list->u.end.sigval != GDB_SIGNAL_0) |
8b739a96 HZ |
1434 | /* FIXME: better way to check */ |
1435 | continue_flag = 0; | |
69d05d38 HZ |
1436 | } |
1437 | } | |
1438 | ||
1439 | if (continue_flag) | |
1440 | { | |
1441 | if (execution_direction == EXEC_REVERSE) | |
1442 | { | |
1443 | if (record_list->prev) | |
1444 | record_list = record_list->prev; | |
1445 | } | |
1446 | else | |
1447 | { | |
1448 | if (record_list->next) | |
1449 | record_list = record_list->next; | |
1450 | } | |
1451 | } | |
1452 | } | |
1453 | while (continue_flag); | |
1454 | ||
69d05d38 HZ |
1455 | replay_out: |
1456 | if (record_get_sig) | |
a493e3e2 PA |
1457 | status->value.sig = GDB_SIGNAL_INT; |
1458 | else if (record_list->u.end.sigval != GDB_SIGNAL_0) | |
8b739a96 HZ |
1459 | /* FIXME: better way to check */ |
1460 | status->value.sig = record_list->u.end.sigval; | |
69d05d38 | 1461 | else |
a493e3e2 | 1462 | status->value.sig = GDB_SIGNAL_TRAP; |
69d05d38 HZ |
1463 | |
1464 | discard_cleanups (old_cleanups); | |
1465 | } | |
1466 | ||
eaaffdf4 HZ |
1467 | signal (SIGINT, handle_sigint); |
1468 | ||
69d05d38 HZ |
1469 | do_cleanups (set_cleanups); |
1470 | return inferior_ptid; | |
1471 | } | |
1472 | ||
32231432 PA |
1473 | static ptid_t |
1474 | record_wait (struct target_ops *ops, | |
1475 | ptid_t ptid, struct target_waitstatus *status, | |
1476 | int options) | |
1477 | { | |
1478 | ptid_t return_ptid; | |
1479 | ||
1480 | return_ptid = record_wait_1 (ops, ptid, status, options); | |
1481 | if (status->kind != TARGET_WAITKIND_IGNORE) | |
1482 | { | |
1483 | /* We're reporting a stop. Make sure any spurious | |
1484 | target_wait(WNOHANG) doesn't advance the target until the | |
1485 | core wants us resumed again. */ | |
1486 | record_resumed = 0; | |
1487 | } | |
1488 | return return_ptid; | |
1489 | } | |
1490 | ||
9093389c PA |
1491 | static int |
1492 | record_stopped_by_watchpoint (void) | |
1493 | { | |
1494 | if (RECORD_IS_REPLAY) | |
1495 | return record_hw_watchpoint; | |
1496 | else | |
1497 | return record_beneath_to_stopped_by_watchpoint (); | |
1498 | } | |
1499 | ||
1500 | static int | |
1501 | record_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) | |
1502 | { | |
1503 | if (RECORD_IS_REPLAY) | |
1504 | return 0; | |
1505 | else | |
1506 | return record_beneath_to_stopped_data_address (ops, addr_p); | |
1507 | } | |
1508 | ||
6df67667 MS |
1509 | /* "to_disconnect" method for process record target. */ |
1510 | ||
69d05d38 HZ |
1511 | static void |
1512 | record_disconnect (struct target_ops *target, char *args, int from_tty) | |
1513 | { | |
1514 | if (record_debug) | |
1515 | fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n"); | |
1516 | ||
1517 | unpush_target (&record_ops); | |
1518 | target_disconnect (args, from_tty); | |
1519 | } | |
1520 | ||
6df67667 MS |
1521 | /* "to_detach" method for process record target. */ |
1522 | ||
69d05d38 HZ |
1523 | static void |
1524 | record_detach (struct target_ops *ops, char *args, int from_tty) | |
1525 | { | |
1526 | if (record_debug) | |
1527 | fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n"); | |
1528 | ||
1529 | unpush_target (&record_ops); | |
1530 | target_detach (args, from_tty); | |
1531 | } | |
1532 | ||
6df67667 MS |
1533 | /* "to_mourn_inferior" method for process record target. */ |
1534 | ||
69d05d38 HZ |
1535 | static void |
1536 | record_mourn_inferior (struct target_ops *ops) | |
1537 | { | |
1538 | if (record_debug) | |
1539 | fprintf_unfiltered (gdb_stdlog, "Process record: " | |
1540 | "record_mourn_inferior\n"); | |
1541 | ||
1542 | unpush_target (&record_ops); | |
1543 | target_mourn_inferior (); | |
1544 | } | |
1545 | ||
1546 | /* Close process record target before killing the inferior process. */ | |
1547 | ||
1548 | static void | |
1549 | record_kill (struct target_ops *ops) | |
1550 | { | |
1551 | if (record_debug) | |
1552 | fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n"); | |
1553 | ||
1554 | unpush_target (&record_ops); | |
1555 | target_kill (); | |
1556 | } | |
1557 | ||
1558 | /* Record registers change (by user or by GDB) to list as an instruction. */ | |
1559 | ||
1560 | static void | |
1561 | record_registers_change (struct regcache *regcache, int regnum) | |
1562 | { | |
1563 | /* Check record_insn_num. */ | |
1564 | record_check_insn_num (0); | |
1565 | ||
1566 | record_arch_list_head = NULL; | |
1567 | record_arch_list_tail = NULL; | |
1568 | ||
1569 | if (regnum < 0) | |
1570 | { | |
1571 | int i; | |
123f5f96 | 1572 | |
69d05d38 HZ |
1573 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
1574 | { | |
1575 | if (record_arch_list_add_reg (regcache, i)) | |
1576 | { | |
1577 | record_list_release (record_arch_list_tail); | |
1578 | error (_("Process record: failed to record execution log.")); | |
1579 | } | |
1580 | } | |
1581 | } | |
1582 | else | |
1583 | { | |
1584 | if (record_arch_list_add_reg (regcache, regnum)) | |
1585 | { | |
1586 | record_list_release (record_arch_list_tail); | |
1587 | error (_("Process record: failed to record execution log.")); | |
1588 | } | |
1589 | } | |
1590 | if (record_arch_list_add_end ()) | |
1591 | { | |
1592 | record_list_release (record_arch_list_tail); | |
1593 | error (_("Process record: failed to record execution log.")); | |
1594 | } | |
1595 | record_list->next = record_arch_list_head; | |
1596 | record_arch_list_head->prev = record_list; | |
1597 | record_list = record_arch_list_tail; | |
1598 | ||
1599 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1600 | record_list_release_first (); | |
1601 | else | |
1602 | record_insn_num++; | |
1603 | } | |
1604 | ||
6df67667 MS |
1605 | /* "to_store_registers" method for process record target. */ |
1606 | ||
69d05d38 HZ |
1607 | static void |
1608 | record_store_registers (struct target_ops *ops, struct regcache *regcache, | |
1609 | int regno) | |
1610 | { | |
1611 | if (!record_gdb_operation_disable) | |
1612 | { | |
1613 | if (RECORD_IS_REPLAY) | |
1614 | { | |
1615 | int n; | |
69d05d38 HZ |
1616 | |
1617 | /* Let user choose if he wants to write register or not. */ | |
1618 | if (regno < 0) | |
1619 | n = | |
604ad007 JB |
1620 | query (_("Because GDB is in replay mode, changing the " |
1621 | "value of a register will make the execution " | |
1622 | "log unusable from this point onward. " | |
1623 | "Change all registers?")); | |
69d05d38 HZ |
1624 | else |
1625 | n = | |
604ad007 JB |
1626 | query (_("Because GDB is in replay mode, changing the value " |
1627 | "of a register will make the execution log unusable " | |
1628 | "from this point onward. Change register %s?"), | |
69d05d38 HZ |
1629 | gdbarch_register_name (get_regcache_arch (regcache), |
1630 | regno)); | |
1631 | ||
1632 | if (!n) | |
1633 | { | |
1634 | /* Invalidate the value of regcache that was set in function | |
1635 | "regcache_raw_write". */ | |
1636 | if (regno < 0) | |
1637 | { | |
1638 | int i; | |
123f5f96 | 1639 | |
69d05d38 HZ |
1640 | for (i = 0; |
1641 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1642 | i++) | |
1643 | regcache_invalidate (regcache, i); | |
1644 | } | |
1645 | else | |
1646 | regcache_invalidate (regcache, regno); | |
1647 | ||
1648 | error (_("Process record canceled the operation.")); | |
1649 | } | |
1650 | ||
1651 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1652 | record_list_release_following (record_list); |
69d05d38 HZ |
1653 | } |
1654 | ||
1655 | record_registers_change (regcache, regno); | |
1656 | } | |
1657 | record_beneath_to_store_registers (record_beneath_to_store_registers_ops, | |
1658 | regcache, regno); | |
1659 | } | |
1660 | ||
27699eea | 1661 | /* "to_xfer_partial" method. Behavior is conditional on RECORD_IS_REPLAY. |
69d05d38 HZ |
1662 | In replay mode, we cannot write memory unles we are willing to |
1663 | invalidate the record/replay log from this point forward. */ | |
1664 | ||
1665 | static LONGEST | |
1666 | record_xfer_partial (struct target_ops *ops, enum target_object object, | |
1667 | const char *annex, gdb_byte *readbuf, | |
1668 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
1669 | { | |
1670 | if (!record_gdb_operation_disable | |
1671 | && (object == TARGET_OBJECT_MEMORY | |
1672 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1673 | { | |
1674 | if (RECORD_IS_REPLAY) | |
1675 | { | |
1676 | /* Let user choose if he wants to write memory or not. */ | |
604ad007 JB |
1677 | if (!query (_("Because GDB is in replay mode, writing to memory " |
1678 | "will make the execution log unusable from this " | |
1679 | "point onward. Write memory at address %s?"), | |
5af949e3 | 1680 | paddress (target_gdbarch, offset))) |
9a9dc473 | 1681 | error (_("Process record canceled the operation.")); |
69d05d38 HZ |
1682 | |
1683 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1684 | record_list_release_following (record_list); |
69d05d38 HZ |
1685 | } |
1686 | ||
1687 | /* Check record_insn_num */ | |
1688 | record_check_insn_num (0); | |
1689 | ||
1690 | /* Record registers change to list as an instruction. */ | |
1691 | record_arch_list_head = NULL; | |
1692 | record_arch_list_tail = NULL; | |
1693 | if (record_arch_list_add_mem (offset, len)) | |
1694 | { | |
1695 | record_list_release (record_arch_list_tail); | |
1696 | if (record_debug) | |
1697 | fprintf_unfiltered (gdb_stdlog, | |
0156b218 MS |
1698 | "Process record: failed to record " |
1699 | "execution log."); | |
69d05d38 HZ |
1700 | return -1; |
1701 | } | |
1702 | if (record_arch_list_add_end ()) | |
1703 | { | |
1704 | record_list_release (record_arch_list_tail); | |
1705 | if (record_debug) | |
1706 | fprintf_unfiltered (gdb_stdlog, | |
0156b218 MS |
1707 | "Process record: failed to record " |
1708 | "execution log."); | |
69d05d38 HZ |
1709 | return -1; |
1710 | } | |
1711 | record_list->next = record_arch_list_head; | |
1712 | record_arch_list_head->prev = record_list; | |
1713 | record_list = record_arch_list_tail; | |
1714 | ||
1715 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1716 | record_list_release_first (); | |
1717 | else | |
1718 | record_insn_num++; | |
1719 | } | |
1720 | ||
1721 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
1722 | object, annex, readbuf, writebuf, | |
1723 | offset, len); | |
1724 | } | |
1725 | ||
0695b514 PA |
1726 | /* This structure represents a breakpoint inserted while the record |
1727 | target is active. We use this to know when to install/remove | |
1728 | breakpoints in/from the target beneath. For example, a breakpoint | |
1729 | may be inserted while recording, but removed when not replaying nor | |
1730 | recording. In that case, the breakpoint had not been inserted on | |
1731 | the target beneath, so we should not try to remove it there. */ | |
1732 | ||
1733 | struct record_breakpoint | |
1734 | { | |
1735 | /* The address and address space the breakpoint was set at. */ | |
1736 | struct address_space *address_space; | |
1737 | CORE_ADDR addr; | |
1738 | ||
1739 | /* True when the breakpoint has been also installed in the target | |
1740 | beneath. This will be false for breakpoints set during replay or | |
1741 | when recording. */ | |
1742 | int in_target_beneath; | |
1743 | }; | |
1744 | ||
1745 | typedef struct record_breakpoint *record_breakpoint_p; | |
1746 | DEF_VEC_P(record_breakpoint_p); | |
1747 | ||
1748 | /* The list of breakpoints inserted while the record target is | |
1749 | active. */ | |
1750 | VEC(record_breakpoint_p) *record_breakpoints = NULL; | |
1751 | ||
20388dd6 YQ |
1752 | static void |
1753 | record_sync_record_breakpoints (struct bp_location *loc, void *data) | |
1754 | { | |
1755 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1756 | return; | |
1757 | ||
1758 | if (loc->inserted) | |
1759 | { | |
1760 | struct record_breakpoint *bp = XNEW (struct record_breakpoint); | |
1761 | ||
1762 | bp->addr = loc->target_info.placed_address; | |
1763 | bp->address_space = loc->target_info.placed_address_space; | |
1764 | ||
1765 | bp->in_target_beneath = 1; | |
1766 | ||
1767 | VEC_safe_push (record_breakpoint_p, record_breakpoints, bp); | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | /* Sync existing breakpoints to record_breakpoints. */ | |
1772 | ||
1773 | static void | |
1774 | record_init_record_breakpoints (void) | |
1775 | { | |
1776 | VEC_free (record_breakpoint_p, record_breakpoints); | |
1777 | ||
1778 | iterate_over_bp_locations (record_sync_record_breakpoints); | |
1779 | } | |
1780 | ||
0695b514 PA |
1781 | /* Behavior is conditional on RECORD_IS_REPLAY. We will not actually |
1782 | insert or remove breakpoints in the real target when replaying, nor | |
1783 | when recording. */ | |
69d05d38 HZ |
1784 | |
1785 | static int | |
a6d9a66e UW |
1786 | record_insert_breakpoint (struct gdbarch *gdbarch, |
1787 | struct bp_target_info *bp_tgt) | |
69d05d38 | 1788 | { |
0695b514 PA |
1789 | struct record_breakpoint *bp; |
1790 | int in_target_beneath = 0; | |
1791 | ||
69d05d38 HZ |
1792 | if (!RECORD_IS_REPLAY) |
1793 | { | |
0695b514 PA |
1794 | /* When recording, we currently always single-step, so we don't |
1795 | really need to install regular breakpoints in the inferior. | |
1796 | However, we do have to insert software single-step | |
1797 | breakpoints, in case the target can't hardware step. To keep | |
1798 | things single, we always insert. */ | |
1799 | struct cleanup *old_cleanups; | |
1800 | int ret; | |
1801 | ||
1802 | old_cleanups = record_gdb_operation_disable_set (); | |
1803 | ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt); | |
69d05d38 HZ |
1804 | do_cleanups (old_cleanups); |
1805 | ||
0695b514 PA |
1806 | if (ret != 0) |
1807 | return ret; | |
1808 | ||
1809 | in_target_beneath = 1; | |
69d05d38 HZ |
1810 | } |
1811 | ||
0695b514 PA |
1812 | bp = XNEW (struct record_breakpoint); |
1813 | bp->addr = bp_tgt->placed_address; | |
1814 | bp->address_space = bp_tgt->placed_address_space; | |
1815 | bp->in_target_beneath = in_target_beneath; | |
1816 | VEC_safe_push (record_breakpoint_p, record_breakpoints, bp); | |
69d05d38 HZ |
1817 | return 0; |
1818 | } | |
1819 | ||
6df67667 MS |
1820 | /* "to_remove_breakpoint" method for process record target. */ |
1821 | ||
69d05d38 | 1822 | static int |
a6d9a66e UW |
1823 | record_remove_breakpoint (struct gdbarch *gdbarch, |
1824 | struct bp_target_info *bp_tgt) | |
69d05d38 | 1825 | { |
0695b514 PA |
1826 | struct record_breakpoint *bp; |
1827 | int ix; | |
1828 | ||
1829 | for (ix = 0; | |
1830 | VEC_iterate (record_breakpoint_p, record_breakpoints, ix, bp); | |
1831 | ++ix) | |
69d05d38 | 1832 | { |
0695b514 PA |
1833 | if (bp->addr == bp_tgt->placed_address |
1834 | && bp->address_space == bp_tgt->placed_address_space) | |
1835 | { | |
1836 | if (bp->in_target_beneath) | |
1837 | { | |
1838 | struct cleanup *old_cleanups; | |
1839 | int ret; | |
69d05d38 | 1840 | |
0695b514 PA |
1841 | old_cleanups = record_gdb_operation_disable_set (); |
1842 | ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt); | |
1843 | do_cleanups (old_cleanups); | |
69d05d38 | 1844 | |
0695b514 PA |
1845 | if (ret != 0) |
1846 | return ret; | |
1847 | } | |
1848 | ||
1849 | VEC_unordered_remove (record_breakpoint_p, record_breakpoints, ix); | |
1850 | return 0; | |
1851 | } | |
69d05d38 HZ |
1852 | } |
1853 | ||
0695b514 | 1854 | gdb_assert_not_reached ("removing unknown breakpoint"); |
69d05d38 HZ |
1855 | } |
1856 | ||
6df67667 | 1857 | /* "to_can_execute_reverse" method for process record target. */ |
27699eea | 1858 | |
69d05d38 HZ |
1859 | static int |
1860 | record_can_execute_reverse (void) | |
1861 | { | |
1862 | return 1; | |
1863 | } | |
1864 | ||
6b04bdb7 MS |
1865 | /* "to_get_bookmark" method for process record and prec over core. */ |
1866 | ||
1867 | static gdb_byte * | |
1868 | record_get_bookmark (char *args, int from_tty) | |
1869 | { | |
1870 | gdb_byte *ret = NULL; | |
1871 | ||
1872 | /* Return stringified form of instruction count. */ | |
1873 | if (record_list && record_list->type == record_end) | |
1874 | ret = xstrdup (pulongest (record_list->u.end.insn_num)); | |
1875 | ||
1876 | if (record_debug) | |
1877 | { | |
1878 | if (ret) | |
1879 | fprintf_unfiltered (gdb_stdlog, | |
1880 | "record_get_bookmark returns %s\n", ret); | |
1881 | else | |
1882 | fprintf_unfiltered (gdb_stdlog, | |
1883 | "record_get_bookmark returns NULL\n"); | |
1884 | } | |
1885 | return ret; | |
1886 | } | |
1887 | ||
1888 | /* The implementation of the command "record goto". */ | |
1889 | static void cmd_record_goto (char *, int); | |
1890 | ||
1891 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1892 | ||
1893 | static void | |
1894 | record_goto_bookmark (gdb_byte *bookmark, int from_tty) | |
1895 | { | |
1896 | if (record_debug) | |
1897 | fprintf_unfiltered (gdb_stdlog, | |
1898 | "record_goto_bookmark receives %s\n", bookmark); | |
1899 | ||
1900 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1901 | { | |
1902 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) | |
1903 | error (_("Unbalanced quotes: %s"), bookmark); | |
1904 | ||
1905 | /* Strip trailing quote. */ | |
1906 | bookmark[strlen (bookmark) - 1] = '\0'; | |
1907 | /* Strip leading quote. */ | |
1908 | bookmark++; | |
1909 | /* Pass along to cmd_record_goto. */ | |
1910 | } | |
1911 | ||
1912 | cmd_record_goto ((char *) bookmark, from_tty); | |
1913 | return; | |
1914 | } | |
1915 | ||
32231432 PA |
1916 | static void |
1917 | record_async (void (*callback) (enum inferior_event_type event_type, | |
1918 | void *context), void *context) | |
1919 | { | |
32231432 PA |
1920 | /* If we're on top of a line target (e.g., linux-nat, remote), then |
1921 | set it to async mode as well. Will be NULL if we're sitting on | |
1922 | top of the core target, for "record restore". */ | |
1923 | if (record_beneath_to_async != NULL) | |
1924 | record_beneath_to_async (callback, context); | |
1925 | } | |
1926 | ||
32231432 PA |
1927 | static int |
1928 | record_can_async_p (void) | |
1929 | { | |
1930 | /* We only enable async when the user specifically asks for it. */ | |
3dd5b83d | 1931 | return target_async_permitted; |
32231432 PA |
1932 | } |
1933 | ||
1934 | static int | |
1935 | record_is_async_p (void) | |
1936 | { | |
1937 | /* We only enable async when the user specifically asks for it. */ | |
3dd5b83d | 1938 | return target_async_permitted; |
32231432 PA |
1939 | } |
1940 | ||
1941 | static enum exec_direction_kind | |
1942 | record_execution_direction (void) | |
1943 | { | |
1944 | return record_execution_dir; | |
1945 | } | |
1946 | ||
69d05d38 HZ |
1947 | static void |
1948 | init_record_ops (void) | |
1949 | { | |
1950 | record_ops.to_shortname = "record"; | |
1951 | record_ops.to_longname = "Process record and replay target"; | |
1952 | record_ops.to_doc = | |
1953 | "Log program while executing and replay execution from log."; | |
1954 | record_ops.to_open = record_open; | |
1955 | record_ops.to_close = record_close; | |
1956 | record_ops.to_resume = record_resume; | |
1957 | record_ops.to_wait = record_wait; | |
1958 | record_ops.to_disconnect = record_disconnect; | |
1959 | record_ops.to_detach = record_detach; | |
1960 | record_ops.to_mourn_inferior = record_mourn_inferior; | |
1961 | record_ops.to_kill = record_kill; | |
1962 | record_ops.to_create_inferior = find_default_create_inferior; | |
1963 | record_ops.to_store_registers = record_store_registers; | |
1964 | record_ops.to_xfer_partial = record_xfer_partial; | |
1965 | record_ops.to_insert_breakpoint = record_insert_breakpoint; | |
1966 | record_ops.to_remove_breakpoint = record_remove_breakpoint; | |
9093389c | 1967 | record_ops.to_stopped_by_watchpoint = record_stopped_by_watchpoint; |
58ed7dcd | 1968 | record_ops.to_stopped_data_address = record_stopped_data_address; |
69d05d38 HZ |
1969 | record_ops.to_can_execute_reverse = record_can_execute_reverse; |
1970 | record_ops.to_stratum = record_stratum; | |
6b04bdb7 MS |
1971 | /* Add bookmark target methods. */ |
1972 | record_ops.to_get_bookmark = record_get_bookmark; | |
1973 | record_ops.to_goto_bookmark = record_goto_bookmark; | |
32231432 PA |
1974 | record_ops.to_async = record_async; |
1975 | record_ops.to_can_async_p = record_can_async_p; | |
1976 | record_ops.to_is_async_p = record_is_async_p; | |
32231432 | 1977 | record_ops.to_execution_direction = record_execution_direction; |
69d05d38 HZ |
1978 | record_ops.to_magic = OPS_MAGIC; |
1979 | } | |
1980 | ||
27699eea MS |
1981 | /* "to_resume" method for prec over corefile. */ |
1982 | ||
1983 | static void | |
1984 | record_core_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1985 | enum gdb_signal signal) |
27699eea MS |
1986 | { |
1987 | record_resume_step = step; | |
32231432 PA |
1988 | record_resumed = 1; |
1989 | record_execution_dir = execution_direction; | |
1990 | ||
1991 | /* We are about to start executing the inferior (or simulate it), | |
1992 | let's register it with the event loop. */ | |
1993 | if (target_can_async_p ()) | |
1994 | { | |
1995 | target_async (inferior_event_handler, 0); | |
1996 | ||
1997 | /* Notify the event loop there's an event to wait for. */ | |
1998 | mark_async_event_handler (record_async_inferior_event_token); | |
1999 | } | |
27699eea MS |
2000 | } |
2001 | ||
2002 | /* "to_kill" method for prec over corefile. */ | |
2003 | ||
2004 | static void | |
2005 | record_core_kill (struct target_ops *ops) | |
2006 | { | |
2007 | if (record_debug) | |
2008 | fprintf_unfiltered (gdb_stdlog, "Process record: record_core_kill\n"); | |
2009 | ||
2010 | unpush_target (&record_core_ops); | |
2011 | } | |
2012 | ||
2013 | /* "to_fetch_registers" method for prec over corefile. */ | |
2014 | ||
2015 | static void | |
2016 | record_core_fetch_registers (struct target_ops *ops, | |
2017 | struct regcache *regcache, | |
2018 | int regno) | |
2019 | { | |
2020 | if (regno < 0) | |
2021 | { | |
2022 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
2023 | int i; | |
2024 | ||
2025 | for (i = 0; i < num; i ++) | |
2026 | regcache_raw_supply (regcache, i, | |
2027 | record_core_regbuf + MAX_REGISTER_SIZE * i); | |
2028 | } | |
2029 | else | |
2030 | regcache_raw_supply (regcache, regno, | |
2031 | record_core_regbuf + MAX_REGISTER_SIZE * regno); | |
2032 | } | |
2033 | ||
2034 | /* "to_prepare_to_store" method for prec over corefile. */ | |
2035 | ||
2036 | static void | |
2037 | record_core_prepare_to_store (struct regcache *regcache) | |
2038 | { | |
2039 | } | |
2040 | ||
2041 | /* "to_store_registers" method for prec over corefile. */ | |
2042 | ||
2043 | static void | |
2044 | record_core_store_registers (struct target_ops *ops, | |
2045 | struct regcache *regcache, | |
2046 | int regno) | |
2047 | { | |
2048 | if (record_gdb_operation_disable) | |
2049 | regcache_raw_collect (regcache, regno, | |
2050 | record_core_regbuf + MAX_REGISTER_SIZE * regno); | |
2051 | else | |
2052 | error (_("You can't do that without a process to debug.")); | |
2053 | } | |
2054 | ||
2055 | /* "to_xfer_partial" method for prec over corefile. */ | |
2056 | ||
2057 | static LONGEST | |
2058 | record_core_xfer_partial (struct target_ops *ops, enum target_object object, | |
2059 | const char *annex, gdb_byte *readbuf, | |
2060 | const gdb_byte *writebuf, ULONGEST offset, | |
2061 | LONGEST len) | |
2062 | { | |
123f5f96 MS |
2063 | if (object == TARGET_OBJECT_MEMORY) |
2064 | { | |
2065 | if (record_gdb_operation_disable || !writebuf) | |
2066 | { | |
2067 | struct target_section *p; | |
2068 | ||
2069 | for (p = record_core_start; p < record_core_end; p++) | |
2070 | { | |
2071 | if (offset >= p->addr) | |
2072 | { | |
2073 | struct record_core_buf_entry *entry; | |
2074 | ULONGEST sec_offset; | |
2075 | ||
2076 | if (offset >= p->endaddr) | |
2077 | continue; | |
2078 | ||
2079 | if (offset + len > p->endaddr) | |
2080 | len = p->endaddr - offset; | |
2081 | ||
2082 | sec_offset = offset - p->addr; | |
2083 | ||
2084 | /* Read readbuf or write writebuf p, offset, len. */ | |
2085 | /* Check flags. */ | |
2086 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2087 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2088 | { | |
2089 | if (readbuf) | |
2090 | memset (readbuf, 0, len); | |
2091 | return len; | |
2092 | } | |
2093 | /* Get record_core_buf_entry. */ | |
2094 | for (entry = record_core_buf_list; entry; | |
2095 | entry = entry->prev) | |
2096 | if (entry->p == p) | |
2097 | break; | |
2098 | if (writebuf) | |
2099 | { | |
2100 | if (!entry) | |
2101 | { | |
2102 | /* Add a new entry. */ | |
2103 | entry = (struct record_core_buf_entry *) | |
2104 | xmalloc (sizeof (struct record_core_buf_entry)); | |
2105 | entry->p = p; | |
2106 | if (!bfd_malloc_and_get_section (p->bfd, | |
2107 | p->the_bfd_section, | |
2108 | &entry->buf)) | |
2109 | { | |
2110 | xfree (entry); | |
2111 | return 0; | |
2112 | } | |
2113 | entry->prev = record_core_buf_list; | |
2114 | record_core_buf_list = entry; | |
2115 | } | |
2116 | ||
2117 | memcpy (entry->buf + sec_offset, writebuf, | |
2118 | (size_t) len); | |
2119 | } | |
2120 | else | |
2121 | { | |
2122 | if (!entry) | |
2123 | return record_beneath_to_xfer_partial | |
2124 | (record_beneath_to_xfer_partial_ops, | |
2125 | object, annex, readbuf, writebuf, | |
2126 | offset, len); | |
2127 | ||
2128 | memcpy (readbuf, entry->buf + sec_offset, | |
2129 | (size_t) len); | |
2130 | } | |
2131 | ||
2132 | return len; | |
2133 | } | |
2134 | } | |
2135 | ||
2136 | return -1; | |
2137 | } | |
2138 | else | |
2139 | error (_("You can't do that without a process to debug.")); | |
2140 | } | |
27699eea MS |
2141 | |
2142 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
2143 | object, annex, readbuf, writebuf, | |
2144 | offset, len); | |
2145 | } | |
2146 | ||
2147 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2148 | ||
2149 | static int | |
2150 | record_core_insert_breakpoint (struct gdbarch *gdbarch, | |
2151 | struct bp_target_info *bp_tgt) | |
2152 | { | |
2153 | return 0; | |
2154 | } | |
2155 | ||
2156 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2157 | ||
2158 | static int | |
2159 | record_core_remove_breakpoint (struct gdbarch *gdbarch, | |
2160 | struct bp_target_info *bp_tgt) | |
2161 | { | |
2162 | return 0; | |
2163 | } | |
2164 | ||
2165 | /* "to_has_execution" method for prec over corefile. */ | |
2166 | ||
aeaec162 TT |
2167 | static int |
2168 | record_core_has_execution (struct target_ops *ops, ptid_t the_ptid) | |
27699eea MS |
2169 | { |
2170 | return 1; | |
2171 | } | |
2172 | ||
2173 | static void | |
2174 | init_record_core_ops (void) | |
2175 | { | |
06280d23 | 2176 | record_core_ops.to_shortname = "record-core"; |
27699eea MS |
2177 | record_core_ops.to_longname = "Process record and replay target"; |
2178 | record_core_ops.to_doc = | |
2179 | "Log program while executing and replay execution from log."; | |
2180 | record_core_ops.to_open = record_open; | |
2181 | record_core_ops.to_close = record_close; | |
2182 | record_core_ops.to_resume = record_core_resume; | |
2183 | record_core_ops.to_wait = record_wait; | |
2184 | record_core_ops.to_kill = record_core_kill; | |
2185 | record_core_ops.to_fetch_registers = record_core_fetch_registers; | |
2186 | record_core_ops.to_prepare_to_store = record_core_prepare_to_store; | |
2187 | record_core_ops.to_store_registers = record_core_store_registers; | |
2188 | record_core_ops.to_xfer_partial = record_core_xfer_partial; | |
2189 | record_core_ops.to_insert_breakpoint = record_core_insert_breakpoint; | |
2190 | record_core_ops.to_remove_breakpoint = record_core_remove_breakpoint; | |
9093389c | 2191 | record_core_ops.to_stopped_by_watchpoint = record_stopped_by_watchpoint; |
58ed7dcd | 2192 | record_core_ops.to_stopped_data_address = record_stopped_data_address; |
27699eea MS |
2193 | record_core_ops.to_can_execute_reverse = record_can_execute_reverse; |
2194 | record_core_ops.to_has_execution = record_core_has_execution; | |
2195 | record_core_ops.to_stratum = record_stratum; | |
6b04bdb7 MS |
2196 | /* Add bookmark target methods. */ |
2197 | record_core_ops.to_get_bookmark = record_get_bookmark; | |
2198 | record_core_ops.to_goto_bookmark = record_goto_bookmark; | |
32231432 PA |
2199 | record_core_ops.to_async = record_async; |
2200 | record_core_ops.to_can_async_p = record_can_async_p; | |
2201 | record_core_ops.to_is_async_p = record_is_async_p; | |
32231432 | 2202 | record_core_ops.to_execution_direction = record_execution_direction; |
27699eea MS |
2203 | record_core_ops.to_magic = OPS_MAGIC; |
2204 | } | |
2205 | ||
6df67667 MS |
2206 | /* Implement "show record debug" command. */ |
2207 | ||
69d05d38 HZ |
2208 | static void |
2209 | show_record_debug (struct ui_file *file, int from_tty, | |
2210 | struct cmd_list_element *c, const char *value) | |
2211 | { | |
2212 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), | |
2213 | value); | |
2214 | } | |
2215 | ||
2216 | /* Alias for "target record". */ | |
2217 | ||
2218 | static void | |
2219 | cmd_record_start (char *args, int from_tty) | |
2220 | { | |
2221 | execute_command ("target record", from_tty); | |
2222 | } | |
2223 | ||
2224 | /* Truncate the record log from the present point | |
2225 | of replay until the end. */ | |
2226 | ||
2227 | static void | |
2228 | cmd_record_delete (char *args, int from_tty) | |
2229 | { | |
2230 | if (current_target.to_stratum == record_stratum) | |
2231 | { | |
2232 | if (RECORD_IS_REPLAY) | |
2233 | { | |
2234 | if (!from_tty || query (_("Delete the log from this point forward " | |
2235 | "and begin to record the running message " | |
2236 | "at current PC?"))) | |
61f75dd8 | 2237 | record_list_release_following (record_list); |
69d05d38 HZ |
2238 | } |
2239 | else | |
2240 | printf_unfiltered (_("Already at end of record list.\n")); | |
2241 | ||
2242 | } | |
2243 | else | |
2244 | printf_unfiltered (_("Process record is not started.\n")); | |
2245 | } | |
2246 | ||
6df67667 | 2247 | /* Implement the "stoprecord" or "record stop" command. */ |
69d05d38 HZ |
2248 | |
2249 | static void | |
2250 | cmd_record_stop (char *args, int from_tty) | |
2251 | { | |
2252 | if (current_target.to_stratum == record_stratum) | |
2253 | { | |
5d40bb85 | 2254 | unpush_target (&record_ops); |
b54295a7 MS |
2255 | printf_unfiltered (_("Process record is stopped and all execution " |
2256 | "logs are deleted.\n")); | |
69d05d38 HZ |
2257 | } |
2258 | else | |
2259 | printf_unfiltered (_("Process record is not started.\n")); | |
2260 | } | |
2261 | ||
2262 | /* Set upper limit of record log size. */ | |
2263 | ||
2264 | static void | |
2265 | set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c) | |
2266 | { | |
2267 | if (record_insn_num > record_insn_max_num && record_insn_max_num) | |
2268 | { | |
265aad34 | 2269 | /* Count down record_insn_num while releasing records from list. */ |
69d05d38 | 2270 | while (record_insn_num > record_insn_max_num) |
265aad34 MS |
2271 | { |
2272 | record_list_release_first (); | |
2273 | record_insn_num--; | |
2274 | } | |
69d05d38 HZ |
2275 | } |
2276 | } | |
2277 | ||
69d05d38 HZ |
2278 | static struct cmd_list_element *record_cmdlist, *set_record_cmdlist, |
2279 | *show_record_cmdlist, *info_record_cmdlist; | |
2280 | ||
2281 | static void | |
2282 | set_record_command (char *args, int from_tty) | |
2283 | { | |
3e43a32a MS |
2284 | printf_unfiltered (_("\"set record\" must be followed " |
2285 | "by an apporpriate subcommand.\n")); | |
69d05d38 HZ |
2286 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); |
2287 | } | |
2288 | ||
2289 | static void | |
2290 | show_record_command (char *args, int from_tty) | |
2291 | { | |
2292 | cmd_show_list (show_record_cmdlist, from_tty, ""); | |
2293 | } | |
2294 | ||
b54295a7 MS |
2295 | /* Display some statistics about the execution log. */ |
2296 | ||
69d05d38 HZ |
2297 | static void |
2298 | info_record_command (char *args, int from_tty) | |
2299 | { | |
b54295a7 MS |
2300 | struct record_entry *p; |
2301 | ||
2302 | if (current_target.to_stratum == record_stratum) | |
2303 | { | |
2304 | if (RECORD_IS_REPLAY) | |
2305 | printf_filtered (_("Replay mode:\n")); | |
2306 | else | |
2307 | printf_filtered (_("Record mode:\n")); | |
2308 | ||
2309 | /* Find entry for first actual instruction in the log. */ | |
2310 | for (p = record_first.next; | |
2311 | p != NULL && p->type != record_end; | |
2312 | p = p->next) | |
2313 | ; | |
2314 | ||
2315 | /* Do we have a log at all? */ | |
2316 | if (p != NULL && p->type == record_end) | |
2317 | { | |
2318 | /* Display instruction number for first instruction in the log. */ | |
2319 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
2320 | pulongest (p->u.end.insn_num)); | |
2321 | ||
2322 | /* If in replay mode, display where we are in the log. */ | |
2323 | if (RECORD_IS_REPLAY) | |
2324 | printf_filtered (_("Current instruction number is %s.\n"), | |
2325 | pulongest (record_list->u.end.insn_num)); | |
2326 | ||
2327 | /* Display instruction number for last instruction in the log. */ | |
2328 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
2329 | pulongest (record_insn_count)); | |
2330 | ||
2331 | /* Display log count. */ | |
2332 | printf_filtered (_("Log contains %d instructions.\n"), | |
2333 | record_insn_num); | |
2334 | } | |
2335 | else | |
2336 | { | |
2337 | printf_filtered (_("No instructions have been logged.\n")); | |
2338 | } | |
2339 | } | |
2340 | else | |
2341 | { | |
2342 | printf_filtered (_("target record is not active.\n")); | |
2343 | } | |
2344 | ||
2345 | /* Display max log size. */ | |
2346 | printf_filtered (_("Max logged instructions is %d.\n"), | |
2347 | record_insn_max_num); | |
69d05d38 HZ |
2348 | } |
2349 | ||
0156b218 MS |
2350 | /* Record log save-file format |
2351 | Version 1 (never released) | |
2352 | ||
2353 | Header: | |
2354 | 4 bytes: magic number htonl(0x20090829). | |
2355 | NOTE: be sure to change whenever this file format changes! | |
2356 | ||
2357 | Records: | |
2358 | record_end: | |
2359 | 1 byte: record type (record_end, see enum record_type). | |
2360 | record_reg: | |
2361 | 1 byte: record type (record_reg, see enum record_type). | |
2362 | 8 bytes: register id (network byte order). | |
2363 | MAX_REGISTER_SIZE bytes: register value. | |
2364 | record_mem: | |
2365 | 1 byte: record type (record_mem, see enum record_type). | |
2366 | 8 bytes: memory length (network byte order). | |
2367 | 8 bytes: memory address (network byte order). | |
2368 | n bytes: memory value (n == memory length). | |
2369 | ||
2370 | Version 2 | |
2371 | 4 bytes: magic number netorder32(0x20091016). | |
2372 | NOTE: be sure to change whenever this file format changes! | |
2373 | ||
2374 | Records: | |
2375 | record_end: | |
2376 | 1 byte: record type (record_end, see enum record_type). | |
2377 | 4 bytes: signal | |
2378 | 4 bytes: instruction count | |
2379 | record_reg: | |
2380 | 1 byte: record type (record_reg, see enum record_type). | |
2381 | 4 bytes: register id (network byte order). | |
2382 | n bytes: register value (n == actual register size). | |
2383 | (eg. 4 bytes for x86 general registers). | |
2384 | record_mem: | |
2385 | 1 byte: record type (record_mem, see enum record_type). | |
2386 | 4 bytes: memory length (network byte order). | |
2387 | 8 bytes: memory address (network byte order). | |
2388 | n bytes: memory value (n == memory length). | |
2389 | ||
2390 | */ | |
2391 | ||
2392 | /* bfdcore_read -- read bytes from a core file section. */ | |
2393 | ||
2394 | static inline void | |
2395 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2396 | { | |
2397 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2398 | ||
2399 | if (ret) | |
2400 | *offset += len; | |
2401 | else | |
4f1cdeec | 2402 | error (_("Failed to read %d bytes from core file %s ('%s')."), |
0156b218 MS |
2403 | len, bfd_get_filename (obfd), |
2404 | bfd_errmsg (bfd_get_error ())); | |
2405 | } | |
2406 | ||
2407 | static inline uint64_t | |
6aa96d03 | 2408 | netorder64 (uint64_t input) |
0156b218 | 2409 | { |
6aa96d03 MS |
2410 | uint64_t ret; |
2411 | ||
2412 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2413 | BFD_ENDIAN_BIG, input); | |
2414 | return ret; | |
0156b218 MS |
2415 | } |
2416 | ||
2417 | static inline uint32_t | |
6aa96d03 | 2418 | netorder32 (uint32_t input) |
0156b218 | 2419 | { |
6aa96d03 MS |
2420 | uint32_t ret; |
2421 | ||
2422 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2423 | BFD_ENDIAN_BIG, input); | |
2424 | return ret; | |
0156b218 MS |
2425 | } |
2426 | ||
2427 | static inline uint16_t | |
6aa96d03 | 2428 | netorder16 (uint16_t input) |
0156b218 | 2429 | { |
6aa96d03 MS |
2430 | uint16_t ret; |
2431 | ||
2432 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2433 | BFD_ENDIAN_BIG, input); | |
2434 | return ret; | |
0156b218 MS |
2435 | } |
2436 | ||
2437 | /* Restore the execution log from a core_bfd file. */ | |
2438 | static void | |
2439 | record_restore (void) | |
2440 | { | |
2441 | uint32_t magic; | |
2442 | struct cleanup *old_cleanups; | |
2443 | struct record_entry *rec; | |
2444 | asection *osec; | |
2445 | uint32_t osec_size; | |
2446 | int bfd_offset = 0; | |
2447 | struct regcache *regcache; | |
2448 | ||
2449 | /* We restore the execution log from the open core bfd, | |
2450 | if there is one. */ | |
2451 | if (core_bfd == NULL) | |
2452 | return; | |
2453 | ||
2454 | /* "record_restore" can only be called when record list is empty. */ | |
2455 | gdb_assert (record_first.next == NULL); | |
2456 | ||
2457 | if (record_debug) | |
07b7cff3 | 2458 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); |
0156b218 MS |
2459 | |
2460 | /* Now need to find our special note section. */ | |
2461 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
0156b218 | 2462 | if (record_debug) |
07b7cff3 PA |
2463 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", |
2464 | osec ? "succeeded" : "failed"); | |
d42de051 MS |
2465 | if (osec == NULL) |
2466 | return; | |
2467 | osec_size = bfd_section_size (core_bfd, osec); | |
0156b218 | 2468 | if (record_debug) |
07b7cff3 | 2469 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); |
0156b218 MS |
2470 | |
2471 | /* Check the magic code. */ | |
2472 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
2473 | if (magic != RECORD_FILE_MAGIC) | |
2474 | error (_("Version mis-match or file format error in core file %s."), | |
2475 | bfd_get_filename (core_bfd)); | |
2476 | if (record_debug) | |
3e43a32a MS |
2477 | fprintf_unfiltered (gdb_stdlog, |
2478 | " Reading 4-byte magic cookie " | |
2479 | "RECORD_FILE_MAGIC (0x%s)\n", | |
07b7cff3 | 2480 | phex_nz (netorder32 (magic), 4)); |
0156b218 MS |
2481 | |
2482 | /* Restore the entries in recfd into record_arch_list_head and | |
2483 | record_arch_list_tail. */ | |
2484 | record_arch_list_head = NULL; | |
2485 | record_arch_list_tail = NULL; | |
2486 | record_insn_num = 0; | |
2487 | old_cleanups = make_cleanup (record_arch_list_cleanups, 0); | |
2488 | regcache = get_current_regcache (); | |
2489 | ||
2490 | while (1) | |
2491 | { | |
ec6dbf37 | 2492 | uint8_t rectype; |
0156b218 MS |
2493 | uint32_t regnum, len, signal, count; |
2494 | uint64_t addr; | |
2495 | ||
2496 | /* We are finished when offset reaches osec_size. */ | |
2497 | if (bfd_offset >= osec_size) | |
2498 | break; | |
ec6dbf37 | 2499 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); |
0156b218 | 2500 | |
ec6dbf37 | 2501 | switch (rectype) |
0156b218 MS |
2502 | { |
2503 | case record_reg: /* reg */ | |
2504 | /* Get register number to regnum. */ | |
2505 | bfdcore_read (core_bfd, osec, ®num, | |
2506 | sizeof (regnum), &bfd_offset); | |
2507 | regnum = netorder32 (regnum); | |
2508 | ||
2509 | rec = record_reg_alloc (regcache, regnum); | |
2510 | ||
2511 | /* Get val. */ | |
2512 | bfdcore_read (core_bfd, osec, record_get_loc (rec), | |
2513 | rec->u.reg.len, &bfd_offset); | |
2514 | ||
07b7cff3 | 2515 | if (record_debug) |
3e43a32a MS |
2516 | fprintf_unfiltered (gdb_stdlog, |
2517 | " Reading register %d (1 " | |
2518 | "plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2519 | rec->u.reg.num, |
2520 | (unsigned long) sizeof (regnum), | |
2521 | rec->u.reg.len); | |
0156b218 MS |
2522 | break; |
2523 | ||
2524 | case record_mem: /* mem */ | |
2525 | /* Get len. */ | |
2526 | bfdcore_read (core_bfd, osec, &len, | |
2527 | sizeof (len), &bfd_offset); | |
2528 | len = netorder32 (len); | |
2529 | ||
2530 | /* Get addr. */ | |
2531 | bfdcore_read (core_bfd, osec, &addr, | |
2532 | sizeof (addr), &bfd_offset); | |
2533 | addr = netorder64 (addr); | |
2534 | ||
2535 | rec = record_mem_alloc (addr, len); | |
2536 | ||
2537 | /* Get val. */ | |
2538 | bfdcore_read (core_bfd, osec, record_get_loc (rec), | |
2539 | rec->u.mem.len, &bfd_offset); | |
2540 | ||
07b7cff3 | 2541 | if (record_debug) |
3e43a32a MS |
2542 | fprintf_unfiltered (gdb_stdlog, |
2543 | " Reading memory %s (1 plus " | |
2544 | "%lu plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2545 | paddress (get_current_arch (), |
2546 | rec->u.mem.addr), | |
2547 | (unsigned long) sizeof (addr), | |
2548 | (unsigned long) sizeof (len), | |
2549 | rec->u.mem.len); | |
0156b218 MS |
2550 | break; |
2551 | ||
2552 | case record_end: /* end */ | |
2553 | rec = record_end_alloc (); | |
2554 | record_insn_num ++; | |
2555 | ||
2556 | /* Get signal value. */ | |
2557 | bfdcore_read (core_bfd, osec, &signal, | |
2558 | sizeof (signal), &bfd_offset); | |
2559 | signal = netorder32 (signal); | |
2560 | rec->u.end.sigval = signal; | |
2561 | ||
2562 | /* Get insn count. */ | |
2563 | bfdcore_read (core_bfd, osec, &count, | |
2564 | sizeof (count), &bfd_offset); | |
2565 | count = netorder32 (count); | |
2566 | rec->u.end.insn_num = count; | |
2567 | record_insn_count = count + 1; | |
07b7cff3 | 2568 | if (record_debug) |
3e43a32a MS |
2569 | fprintf_unfiltered (gdb_stdlog, |
2570 | " Reading record_end (1 + " | |
2571 | "%lu + %lu bytes), offset == %s\n", | |
07b7cff3 PA |
2572 | (unsigned long) sizeof (signal), |
2573 | (unsigned long) sizeof (count), | |
2574 | paddress (get_current_arch (), | |
2575 | bfd_offset)); | |
0156b218 MS |
2576 | break; |
2577 | ||
2578 | default: | |
2579 | error (_("Bad entry type in core file %s."), | |
2580 | bfd_get_filename (core_bfd)); | |
2581 | break; | |
2582 | } | |
2583 | ||
2584 | /* Add rec to record arch list. */ | |
2585 | record_arch_list_add (rec); | |
2586 | } | |
2587 | ||
2588 | discard_cleanups (old_cleanups); | |
2589 | ||
2590 | /* Add record_arch_list_head to the end of record list. */ | |
2591 | record_first.next = record_arch_list_head; | |
2592 | record_arch_list_head->prev = &record_first; | |
2593 | record_arch_list_tail->next = NULL; | |
2594 | record_list = &record_first; | |
2595 | ||
2596 | /* Update record_insn_max_num. */ | |
2597 | if (record_insn_num > record_insn_max_num) | |
2598 | { | |
2599 | record_insn_max_num = record_insn_num; | |
2600 | warning (_("Auto increase record/replay buffer limit to %d."), | |
2601 | record_insn_max_num); | |
2602 | } | |
2603 | ||
2604 | /* Succeeded. */ | |
2605 | printf_filtered (_("Restored records from core file %s.\n"), | |
2606 | bfd_get_filename (core_bfd)); | |
2607 | ||
2608 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
2609 | } | |
2610 | ||
2611 | /* bfdcore_write -- write bytes into a core file section. */ | |
2612 | ||
2613 | static inline void | |
2614 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2615 | { | |
2616 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2617 | ||
2618 | if (ret) | |
2619 | *offset += len; | |
2620 | else | |
b37520b6 | 2621 | error (_("Failed to write %d bytes to core file %s ('%s')."), |
0156b218 MS |
2622 | len, bfd_get_filename (obfd), |
2623 | bfd_errmsg (bfd_get_error ())); | |
2624 | } | |
2625 | ||
2626 | /* Restore the execution log from a file. We use a modified elf | |
2627 | corefile format, with an extra section for our data. */ | |
2628 | ||
2629 | static void | |
2630 | cmd_record_restore (char *args, int from_tty) | |
2631 | { | |
2632 | core_file_command (args, from_tty); | |
2633 | record_open (args, from_tty); | |
2634 | } | |
2635 | ||
2636 | static void | |
2637 | record_save_cleanups (void *data) | |
2638 | { | |
2639 | bfd *obfd = data; | |
2640 | char *pathname = xstrdup (bfd_get_filename (obfd)); | |
123f5f96 | 2641 | |
cbb099e8 | 2642 | gdb_bfd_unref (obfd); |
0156b218 MS |
2643 | unlink (pathname); |
2644 | xfree (pathname); | |
2645 | } | |
2646 | ||
2647 | /* Save the execution log to a file. We use a modified elf corefile | |
2648 | format, with an extra section for our data. */ | |
2649 | ||
2650 | static void | |
2651 | cmd_record_save (char *args, int from_tty) | |
2652 | { | |
2653 | char *recfilename, recfilename_buffer[40]; | |
0156b218 MS |
2654 | struct record_entry *cur_record_list; |
2655 | uint32_t magic; | |
2656 | struct regcache *regcache; | |
2657 | struct gdbarch *gdbarch; | |
2658 | struct cleanup *old_cleanups; | |
2659 | struct cleanup *set_cleanups; | |
2660 | bfd *obfd; | |
2661 | int save_size = 0; | |
2662 | asection *osec = NULL; | |
2663 | int bfd_offset = 0; | |
2664 | ||
2665 | if (strcmp (current_target.to_shortname, "record") != 0) | |
2666 | error (_("This command can only be used with target 'record'.\n" | |
2667 | "Use 'target record' first.\n")); | |
2668 | ||
2669 | if (args && *args) | |
2670 | recfilename = args; | |
2671 | else | |
2672 | { | |
2673 | /* Default recfile name is "gdb_record.PID". */ | |
2674 | snprintf (recfilename_buffer, sizeof (recfilename_buffer), | |
2675 | "gdb_record.%d", PIDGET (inferior_ptid)); | |
2676 | recfilename = recfilename_buffer; | |
2677 | } | |
2678 | ||
2679 | /* Open the save file. */ | |
2680 | if (record_debug) | |
07b7cff3 PA |
2681 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", |
2682 | recfilename); | |
0156b218 MS |
2683 | |
2684 | /* Open the output file. */ | |
2685 | obfd = create_gcore_bfd (recfilename); | |
2686 | old_cleanups = make_cleanup (record_save_cleanups, obfd); | |
2687 | ||
2688 | /* Save the current record entry to "cur_record_list". */ | |
2689 | cur_record_list = record_list; | |
2690 | ||
2691 | /* Get the values of regcache and gdbarch. */ | |
2692 | regcache = get_current_regcache (); | |
2693 | gdbarch = get_regcache_arch (regcache); | |
2694 | ||
2695 | /* Disable the GDB operation record. */ | |
2696 | set_cleanups = record_gdb_operation_disable_set (); | |
2697 | ||
2698 | /* Reverse execute to the begin of record list. */ | |
2699 | while (1) | |
2700 | { | |
2701 | /* Check for beginning and end of log. */ | |
2702 | if (record_list == &record_first) | |
2703 | break; | |
2704 | ||
2705 | record_exec_insn (regcache, gdbarch, record_list); | |
2706 | ||
2707 | if (record_list->prev) | |
2708 | record_list = record_list->prev; | |
2709 | } | |
2710 | ||
2711 | /* Compute the size needed for the extra bfd section. */ | |
2712 | save_size = 4; /* magic cookie */ | |
2713 | for (record_list = record_first.next; record_list; | |
2714 | record_list = record_list->next) | |
2715 | switch (record_list->type) | |
2716 | { | |
2717 | case record_end: | |
2718 | save_size += 1 + 4 + 4; | |
2719 | break; | |
2720 | case record_reg: | |
2721 | save_size += 1 + 4 + record_list->u.reg.len; | |
2722 | break; | |
2723 | case record_mem: | |
2724 | save_size += 1 + 4 + 8 + record_list->u.mem.len; | |
2725 | break; | |
2726 | } | |
2727 | ||
2728 | /* Make the new bfd section. */ | |
2729 | osec = bfd_make_section_anyway_with_flags (obfd, "precord", | |
2730 | SEC_HAS_CONTENTS | |
2731 | | SEC_READONLY); | |
2732 | if (osec == NULL) | |
2733 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2734 | recfilename, | |
2735 | bfd_errmsg (bfd_get_error ())); | |
2736 | bfd_set_section_size (obfd, osec, save_size); | |
2737 | bfd_set_section_vma (obfd, osec, 0); | |
2738 | bfd_set_section_alignment (obfd, osec, 0); | |
2739 | bfd_section_lma (obfd, osec) = 0; | |
2740 | ||
2741 | /* Save corefile state. */ | |
2742 | write_gcore_file (obfd); | |
2743 | ||
2744 | /* Write out the record log. */ | |
2745 | /* Write the magic code. */ | |
2746 | magic = RECORD_FILE_MAGIC; | |
2747 | if (record_debug) | |
3e43a32a MS |
2748 | fprintf_unfiltered (gdb_stdlog, |
2749 | " Writing 4-byte magic cookie " | |
2750 | "RECORD_FILE_MAGIC (0x%s)\n", | |
07b7cff3 | 2751 | phex_nz (magic, 4)); |
0156b218 MS |
2752 | bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset); |
2753 | ||
2754 | /* Save the entries to recfd and forward execute to the end of | |
2755 | record list. */ | |
2756 | record_list = &record_first; | |
2757 | while (1) | |
2758 | { | |
2759 | /* Save entry. */ | |
2760 | if (record_list != &record_first) | |
2761 | { | |
2762 | uint8_t type; | |
2763 | uint32_t regnum, len, signal, count; | |
2764 | uint64_t addr; | |
2765 | ||
2766 | type = record_list->type; | |
2767 | bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset); | |
2768 | ||
2769 | switch (record_list->type) | |
2770 | { | |
2771 | case record_reg: /* reg */ | |
07b7cff3 | 2772 | if (record_debug) |
3e43a32a MS |
2773 | fprintf_unfiltered (gdb_stdlog, |
2774 | " Writing register %d (1 " | |
2775 | "plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2776 | record_list->u.reg.num, |
2777 | (unsigned long) sizeof (regnum), | |
2778 | record_list->u.reg.len); | |
0156b218 MS |
2779 | |
2780 | /* Write regnum. */ | |
2781 | regnum = netorder32 (record_list->u.reg.num); | |
2782 | bfdcore_write (obfd, osec, ®num, | |
2783 | sizeof (regnum), &bfd_offset); | |
2784 | ||
2785 | /* Write regval. */ | |
2786 | bfdcore_write (obfd, osec, record_get_loc (record_list), | |
2787 | record_list->u.reg.len, &bfd_offset); | |
2788 | break; | |
2789 | ||
2790 | case record_mem: /* mem */ | |
2791 | if (record_debug) | |
3e43a32a MS |
2792 | fprintf_unfiltered (gdb_stdlog, |
2793 | " Writing memory %s (1 plus " | |
2794 | "%lu plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2795 | paddress (gdbarch, |
2796 | record_list->u.mem.addr), | |
2797 | (unsigned long) sizeof (addr), | |
2798 | (unsigned long) sizeof (len), | |
2799 | record_list->u.mem.len); | |
0156b218 MS |
2800 | |
2801 | /* Write memlen. */ | |
2802 | len = netorder32 (record_list->u.mem.len); | |
2803 | bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset); | |
2804 | ||
2805 | /* Write memaddr. */ | |
2806 | addr = netorder64 (record_list->u.mem.addr); | |
2807 | bfdcore_write (obfd, osec, &addr, | |
2808 | sizeof (addr), &bfd_offset); | |
2809 | ||
2810 | /* Write memval. */ | |
2811 | bfdcore_write (obfd, osec, record_get_loc (record_list), | |
2812 | record_list->u.mem.len, &bfd_offset); | |
2813 | break; | |
2814 | ||
2815 | case record_end: | |
07b7cff3 | 2816 | if (record_debug) |
3e43a32a MS |
2817 | fprintf_unfiltered (gdb_stdlog, |
2818 | " Writing record_end (1 + " | |
2819 | "%lu + %lu bytes)\n", | |
07b7cff3 PA |
2820 | (unsigned long) sizeof (signal), |
2821 | (unsigned long) sizeof (count)); | |
0156b218 MS |
2822 | /* Write signal value. */ |
2823 | signal = netorder32 (record_list->u.end.sigval); | |
2824 | bfdcore_write (obfd, osec, &signal, | |
2825 | sizeof (signal), &bfd_offset); | |
2826 | ||
2827 | /* Write insn count. */ | |
2828 | count = netorder32 (record_list->u.end.insn_num); | |
2829 | bfdcore_write (obfd, osec, &count, | |
2830 | sizeof (count), &bfd_offset); | |
2831 | break; | |
2832 | } | |
2833 | } | |
2834 | ||
2835 | /* Execute entry. */ | |
2836 | record_exec_insn (regcache, gdbarch, record_list); | |
2837 | ||
2838 | if (record_list->next) | |
2839 | record_list = record_list->next; | |
2840 | else | |
2841 | break; | |
2842 | } | |
2843 | ||
2844 | /* Reverse execute to cur_record_list. */ | |
2845 | while (1) | |
2846 | { | |
2847 | /* Check for beginning and end of log. */ | |
2848 | if (record_list == cur_record_list) | |
2849 | break; | |
2850 | ||
2851 | record_exec_insn (regcache, gdbarch, record_list); | |
2852 | ||
2853 | if (record_list->prev) | |
2854 | record_list = record_list->prev; | |
2855 | } | |
2856 | ||
2857 | do_cleanups (set_cleanups); | |
cbb099e8 | 2858 | gdb_bfd_unref (obfd); |
0156b218 MS |
2859 | discard_cleanups (old_cleanups); |
2860 | ||
2861 | /* Succeeded. */ | |
2862 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2863 | recfilename); | |
2864 | } | |
2865 | ||
6b04bdb7 MS |
2866 | /* record_goto_insn -- rewind the record log (forward or backward, |
2867 | depending on DIR) to the given entry, changing the program state | |
2868 | correspondingly. */ | |
2869 | ||
2870 | static void | |
2871 | record_goto_insn (struct record_entry *entry, | |
2872 | enum exec_direction_kind dir) | |
2873 | { | |
2874 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
2875 | struct regcache *regcache = get_current_regcache (); | |
2876 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2877 | ||
2878 | /* Assume everything is valid: we will hit the entry, | |
2879 | and we will not hit the end of the recording. */ | |
2880 | ||
2881 | if (dir == EXEC_FORWARD) | |
2882 | record_list = record_list->next; | |
2883 | ||
2884 | do | |
2885 | { | |
2886 | record_exec_insn (regcache, gdbarch, record_list); | |
2887 | if (dir == EXEC_REVERSE) | |
2888 | record_list = record_list->prev; | |
2889 | else | |
2890 | record_list = record_list->next; | |
2891 | } while (record_list != entry); | |
2892 | do_cleanups (set_cleanups); | |
2893 | } | |
2894 | ||
2895 | /* "record goto" command. Argument is an instruction number, | |
2896 | as given by "info record". | |
2897 | ||
2898 | Rewinds the recording (forward or backward) to the given instruction. */ | |
2899 | ||
2900 | static void | |
2901 | cmd_record_goto (char *arg, int from_tty) | |
2902 | { | |
2903 | struct record_entry *p = NULL; | |
2904 | ULONGEST target_insn = 0; | |
2905 | ||
2906 | if (arg == NULL || *arg == '\0') | |
2907 | error (_("Command requires an argument (insn number to go to).")); | |
2908 | ||
2909 | if (strncmp (arg, "start", strlen ("start")) == 0 | |
2910 | || strncmp (arg, "begin", strlen ("begin")) == 0) | |
2911 | { | |
2912 | /* Special case. Find first insn. */ | |
2913 | for (p = &record_first; p != NULL; p = p->next) | |
2914 | if (p->type == record_end) | |
2915 | break; | |
2916 | if (p) | |
2917 | target_insn = p->u.end.insn_num; | |
2918 | } | |
2919 | else if (strncmp (arg, "end", strlen ("end")) == 0) | |
2920 | { | |
2921 | /* Special case. Find last insn. */ | |
2922 | for (p = record_list; p->next != NULL; p = p->next) | |
2923 | ; | |
2924 | for (; p!= NULL; p = p->prev) | |
2925 | if (p->type == record_end) | |
2926 | break; | |
2927 | if (p) | |
2928 | target_insn = p->u.end.insn_num; | |
2929 | } | |
2930 | else | |
2931 | { | |
2932 | /* General case. Find designated insn. */ | |
2933 | target_insn = parse_and_eval_long (arg); | |
2934 | ||
2935 | for (p = &record_first; p != NULL; p = p->next) | |
2936 | if (p->type == record_end && p->u.end.insn_num == target_insn) | |
2937 | break; | |
2938 | } | |
2939 | ||
2940 | if (p == NULL) | |
2941 | error (_("Target insn '%s' not found."), arg); | |
2942 | else if (p == record_list) | |
2943 | error (_("Already at insn '%s'."), arg); | |
2944 | else if (p->u.end.insn_num > record_list->u.end.insn_num) | |
2945 | { | |
2946 | printf_filtered (_("Go forward to insn number %s\n"), | |
2947 | pulongest (target_insn)); | |
2948 | record_goto_insn (p, EXEC_FORWARD); | |
2949 | } | |
2950 | else | |
2951 | { | |
2952 | printf_filtered (_("Go backward to insn number %s\n"), | |
2953 | pulongest (target_insn)); | |
2954 | record_goto_insn (p, EXEC_REVERSE); | |
2955 | } | |
2956 | registers_changed (); | |
2957 | reinit_frame_cache (); | |
2958 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
2959 | } | |
2960 | ||
70221824 PA |
2961 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
2962 | extern initialize_file_ftype _initialize_record; | |
2963 | ||
69d05d38 HZ |
2964 | void |
2965 | _initialize_record (void) | |
2966 | { | |
0156b218 MS |
2967 | struct cmd_list_element *c; |
2968 | ||
69d05d38 HZ |
2969 | /* Init record_first. */ |
2970 | record_first.prev = NULL; | |
2971 | record_first.next = NULL; | |
2972 | record_first.type = record_end; | |
2973 | ||
2974 | init_record_ops (); | |
2975 | add_target (&record_ops); | |
27699eea MS |
2976 | init_record_core_ops (); |
2977 | add_target (&record_core_ops); | |
69d05d38 HZ |
2978 | |
2979 | add_setshow_zinteger_cmd ("record", no_class, &record_debug, | |
2980 | _("Set debugging of record/replay feature."), | |
2981 | _("Show debugging of record/replay feature."), | |
2982 | _("When enabled, debugging output for " | |
2983 | "record/replay feature is displayed."), | |
2984 | NULL, show_record_debug, &setdebuglist, | |
2985 | &showdebuglist); | |
2986 | ||
0156b218 MS |
2987 | c = add_prefix_cmd ("record", class_obscure, cmd_record_start, |
2988 | _("Abbreviated form of \"target record\" command."), | |
2989 | &record_cmdlist, "record ", 0, &cmdlist); | |
2990 | set_cmd_completer (c, filename_completer); | |
2991 | ||
69d05d38 HZ |
2992 | add_com_alias ("rec", "record", class_obscure, 1); |
2993 | add_prefix_cmd ("record", class_support, set_record_command, | |
2994 | _("Set record options"), &set_record_cmdlist, | |
2995 | "set record ", 0, &setlist); | |
2996 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); | |
2997 | add_prefix_cmd ("record", class_support, show_record_command, | |
2998 | _("Show record options"), &show_record_cmdlist, | |
2999 | "show record ", 0, &showlist); | |
3000 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); | |
3001 | add_prefix_cmd ("record", class_support, info_record_command, | |
3002 | _("Info record options"), &info_record_cmdlist, | |
3003 | "info record ", 0, &infolist); | |
3004 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); | |
3005 | ||
0156b218 MS |
3006 | c = add_cmd ("save", class_obscure, cmd_record_save, |
3007 | _("Save the execution log to a file.\n\ | |
3008 | Argument is optional filename.\n\ | |
3009 | Default filename is 'gdb_record.<process_id>'."), | |
3010 | &record_cmdlist); | |
3011 | set_cmd_completer (c, filename_completer); | |
3012 | ||
3013 | c = add_cmd ("restore", class_obscure, cmd_record_restore, | |
3014 | _("Restore the execution log from a file.\n\ | |
3015 | Argument is filename. File must be created with 'record save'."), | |
3016 | &record_cmdlist); | |
3017 | set_cmd_completer (c, filename_completer); | |
69d05d38 HZ |
3018 | |
3019 | add_cmd ("delete", class_obscure, cmd_record_delete, | |
3020 | _("Delete the rest of execution log and start recording it anew."), | |
3021 | &record_cmdlist); | |
3022 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); | |
3023 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); | |
3024 | ||
3025 | add_cmd ("stop", class_obscure, cmd_record_stop, | |
3026 | _("Stop the record/replay target."), | |
3027 | &record_cmdlist); | |
3028 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); | |
3029 | ||
3030 | /* Record instructions number limit command. */ | |
3031 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
fda458ee | 3032 | &record_stop_at_limit, _("\ |
299a410e | 3033 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
3e43a32a MS |
3034 | Show whether record/replay stops when record/replay buffer becomes full."), |
3035 | _("Default is ON.\n\ | |
299a410e EZ |
3036 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ |
3037 | When OFF, if the record/replay buffer becomes full,\n\ | |
3038 | delete the oldest recorded instruction to make room for each new one."), | |
fda458ee MS |
3039 | NULL, NULL, |
3040 | &set_record_cmdlist, &show_record_cmdlist); | |
191e1813 | 3041 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
69d05d38 HZ |
3042 | &record_insn_max_num, |
3043 | _("Set record/replay buffer limit."), | |
299a410e EZ |
3044 | _("Show record/replay buffer limit."), _("\ |
3045 | Set the maximum number of instructions to be stored in the\n\ | |
3046 | record/replay buffer. Zero means unlimited. Default is 200000."), | |
69d05d38 HZ |
3047 | set_record_insn_max_num, |
3048 | NULL, &set_record_cmdlist, &show_record_cmdlist); | |
6b04bdb7 MS |
3049 | |
3050 | add_cmd ("goto", class_obscure, cmd_record_goto, _("\ | |
3051 | Restore the program to its state at instruction number N.\n\ | |
3052 | Argument is instruction number, as shown by 'info record'."), | |
3053 | &record_cmdlist); | |
bb08c432 HZ |
3054 | |
3055 | add_setshow_boolean_cmd ("memory-query", no_class, | |
3056 | &record_memory_query, _("\ | |
3057 | Set whether query if PREC cannot record memory change of next instruction."), | |
3058 | _("\ | |
3059 | Show whether query if PREC cannot record memory change of next instruction."), | |
3060 | _("\ | |
3061 | Default is OFF.\n\ | |
3062 | When ON, query if PREC cannot record memory change of next instruction."), | |
3063 | NULL, NULL, | |
3064 | &set_record_cmdlist, &show_record_cmdlist); | |
a480d2f6 | 3065 | |
69d05d38 | 3066 | } |