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 | ||
4ffa4fc7 PA |
488 | int |
489 | record_read_memory (struct gdbarch *gdbarch, | |
490 | CORE_ADDR memaddr, gdb_byte *myaddr, | |
491 | ssize_t len) | |
492 | { | |
493 | int ret = target_read_memory (memaddr, myaddr, len); | |
494 | ||
495 | if (ret && record_debug) | |
496 | printf_unfiltered (_("Process record: error reading memory " | |
497 | "at addr %s len = %ld.\n"), | |
498 | paddress (gdbarch, memaddr), (long) len); | |
499 | return ret; | |
500 | } | |
501 | ||
69d05d38 HZ |
502 | /* Record the value of a region of memory whose address is ADDR and |
503 | length is LEN to record_arch_list. */ | |
504 | ||
505 | int | |
506 | record_arch_list_add_mem (CORE_ADDR addr, int len) | |
507 | { | |
508 | struct record_entry *rec; | |
509 | ||
510 | if (record_debug > 1) | |
511 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 | 512 | "Process record: add mem addr = %s len = %d to " |
69d05d38 | 513 | "record list.\n", |
5af949e3 | 514 | paddress (target_gdbarch, addr), len); |
69d05d38 | 515 | |
0df8b418 | 516 | if (!addr) /* FIXME: Why? Some arch must permit it... */ |
69d05d38 HZ |
517 | return 0; |
518 | ||
61f75dd8 | 519 | rec = record_mem_alloc (addr, len); |
69d05d38 | 520 | |
4ffa4fc7 | 521 | if (record_read_memory (target_gdbarch, addr, record_get_loc (rec), len)) |
69d05d38 | 522 | { |
61f75dd8 | 523 | record_mem_release (rec); |
69d05d38 HZ |
524 | return -1; |
525 | } | |
526 | ||
527 | record_arch_list_add (rec); | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | /* Add a record_end type struct record_entry to record_arch_list. */ | |
533 | ||
534 | int | |
535 | record_arch_list_add_end (void) | |
536 | { | |
537 | struct record_entry *rec; | |
538 | ||
539 | if (record_debug > 1) | |
540 | fprintf_unfiltered (gdb_stdlog, | |
541 | "Process record: add end to arch list.\n"); | |
542 | ||
61f75dd8 | 543 | rec = record_end_alloc (); |
a493e3e2 | 544 | rec->u.end.sigval = GDB_SIGNAL_0; |
b54295a7 | 545 | rec->u.end.insn_num = ++record_insn_count; |
69d05d38 HZ |
546 | |
547 | record_arch_list_add (rec); | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
552 | static void | |
553 | record_check_insn_num (int set_terminal) | |
554 | { | |
555 | if (record_insn_max_num) | |
556 | { | |
557 | gdb_assert (record_insn_num <= record_insn_max_num); | |
558 | if (record_insn_num == record_insn_max_num) | |
559 | { | |
560 | /* Ask user what to do. */ | |
561 | if (record_stop_at_limit) | |
562 | { | |
563 | int q; | |
123f5f96 | 564 | |
69d05d38 HZ |
565 | if (set_terminal) |
566 | target_terminal_ours (); | |
567 | q = yquery (_("Do you want to auto delete previous execution " | |
568 | "log entries when record/replay buffer becomes " | |
569 | "full (record stop-at-limit)?")); | |
570 | if (set_terminal) | |
571 | target_terminal_inferior (); | |
572 | if (q) | |
573 | record_stop_at_limit = 0; | |
574 | else | |
0156b218 | 575 | error (_("Process record: stopped by user.")); |
69d05d38 HZ |
576 | } |
577 | } | |
578 | } | |
579 | } | |
580 | ||
0156b218 MS |
581 | static void |
582 | record_arch_list_cleanups (void *ignore) | |
583 | { | |
584 | record_list_release (record_arch_list_tail); | |
585 | } | |
586 | ||
69d05d38 HZ |
587 | /* Before inferior step (when GDB record the running message, inferior |
588 | only can step), GDB will call this function to record the values to | |
589 | record_list. This function will call gdbarch_process_record to | |
590 | record the running message of inferior and set them to | |
591 | record_arch_list, and add it to record_list. */ | |
592 | ||
69d05d38 | 593 | static int |
2ea28649 | 594 | record_message (struct regcache *regcache, enum gdb_signal signal) |
69d05d38 HZ |
595 | { |
596 | int ret; | |
e6a386cd | 597 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
0156b218 | 598 | struct cleanup *old_cleanups = make_cleanup (record_arch_list_cleanups, 0); |
69d05d38 HZ |
599 | |
600 | record_arch_list_head = NULL; | |
601 | record_arch_list_tail = NULL; | |
602 | ||
603 | /* Check record_insn_num. */ | |
604 | record_check_insn_num (1); | |
605 | ||
8b739a96 HZ |
606 | /* If gdb sends a signal value to target_resume, |
607 | save it in the 'end' field of the previous instruction. | |
608 | ||
609 | Maybe process record should record what really happened, | |
610 | rather than what gdb pretends has happened. | |
611 | ||
612 | So if Linux delivered the signal to the child process during | |
613 | the record mode, we will record it and deliver it again in | |
614 | the replay mode. | |
615 | ||
616 | If user says "ignore this signal" during the record mode, then | |
617 | it will be ignored again during the replay mode (no matter if | |
618 | the user says something different, like "deliver this signal" | |
619 | during the replay mode). | |
620 | ||
621 | User should understand that nothing he does during the replay | |
622 | mode will change the behavior of the child. If he tries, | |
623 | then that is a user error. | |
624 | ||
625 | But we should still deliver the signal to gdb during the replay, | |
626 | if we delivered it during the recording. Therefore we should | |
627 | record the signal during record_wait, not record_resume. */ | |
628 | if (record_list != &record_first) /* FIXME better way to check */ | |
629 | { | |
630 | gdb_assert (record_list->type == record_end); | |
e6a386cd | 631 | record_list->u.end.sigval = signal; |
8b739a96 HZ |
632 | } |
633 | ||
a493e3e2 | 634 | if (signal == GDB_SIGNAL_0 |
8b739a96 HZ |
635 | || !gdbarch_process_record_signal_p (gdbarch)) |
636 | ret = gdbarch_process_record (gdbarch, | |
e6a386cd HZ |
637 | regcache, |
638 | regcache_read_pc (regcache)); | |
8b739a96 HZ |
639 | else |
640 | ret = gdbarch_process_record_signal (gdbarch, | |
e6a386cd HZ |
641 | regcache, |
642 | signal); | |
8b739a96 | 643 | |
69d05d38 HZ |
644 | if (ret > 0) |
645 | error (_("Process record: inferior program stopped.")); | |
646 | if (ret < 0) | |
647 | error (_("Process record: failed to record execution log.")); | |
648 | ||
649 | discard_cleanups (old_cleanups); | |
650 | ||
651 | record_list->next = record_arch_list_head; | |
652 | record_arch_list_head->prev = record_list; | |
653 | record_list = record_arch_list_tail; | |
654 | ||
655 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
656 | record_list_release_first (); | |
657 | else | |
658 | record_insn_num++; | |
659 | ||
660 | return 1; | |
661 | } | |
662 | ||
e6a386cd HZ |
663 | struct record_message_args { |
664 | struct regcache *regcache; | |
2ea28649 | 665 | enum gdb_signal signal; |
e6a386cd HZ |
666 | }; |
667 | ||
69d05d38 | 668 | static int |
e6a386cd HZ |
669 | record_message_wrapper (void *args) |
670 | { | |
671 | struct record_message_args *record_args = args; | |
672 | ||
673 | return record_message (record_args->regcache, record_args->signal); | |
674 | } | |
675 | ||
676 | static int | |
677 | record_message_wrapper_safe (struct regcache *regcache, | |
2ea28649 | 678 | enum gdb_signal signal) |
69d05d38 | 679 | { |
8b739a96 HZ |
680 | struct record_message_args args; |
681 | ||
682 | args.regcache = regcache; | |
683 | args.signal = signal; | |
e6a386cd HZ |
684 | |
685 | return catch_errors (record_message_wrapper, &args, NULL, RETURN_MASK_ALL); | |
69d05d38 HZ |
686 | } |
687 | ||
688 | /* Set to 1 if record_store_registers and record_xfer_partial | |
689 | doesn't need record. */ | |
690 | ||
691 | static int record_gdb_operation_disable = 0; | |
692 | ||
693 | struct cleanup * | |
694 | record_gdb_operation_disable_set (void) | |
695 | { | |
696 | struct cleanup *old_cleanups = NULL; | |
697 | ||
698 | old_cleanups = | |
699 | make_cleanup_restore_integer (&record_gdb_operation_disable); | |
700 | record_gdb_operation_disable = 1; | |
701 | ||
702 | return old_cleanups; | |
703 | } | |
704 | ||
9093389c PA |
705 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ |
706 | static int record_hw_watchpoint = 0; | |
707 | ||
90ca0479 MS |
708 | /* Execute one instruction from the record log. Each instruction in |
709 | the log will be represented by an arbitrary sequence of register | |
710 | entries and memory entries, followed by an 'end' entry. */ | |
711 | ||
712 | static inline void | |
713 | record_exec_insn (struct regcache *regcache, struct gdbarch *gdbarch, | |
714 | struct record_entry *entry) | |
715 | { | |
716 | switch (entry->type) | |
717 | { | |
718 | case record_reg: /* reg */ | |
719 | { | |
720 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
721 | ||
722 | if (record_debug > 1) | |
723 | fprintf_unfiltered (gdb_stdlog, | |
724 | "Process record: record_reg %s to " | |
725 | "inferior num = %d.\n", | |
726 | host_address_to_string (entry), | |
727 | entry->u.reg.num); | |
728 | ||
729 | regcache_cooked_read (regcache, entry->u.reg.num, reg); | |
730 | regcache_cooked_write (regcache, entry->u.reg.num, | |
731 | record_get_loc (entry)); | |
732 | memcpy (record_get_loc (entry), reg, entry->u.reg.len); | |
733 | } | |
734 | break; | |
735 | ||
736 | case record_mem: /* mem */ | |
737 | { | |
738 | /* Nothing to do if the entry is flagged not_accessible. */ | |
739 | if (!entry->u.mem.mem_entry_not_accessible) | |
740 | { | |
741 | gdb_byte *mem = alloca (entry->u.mem.len); | |
742 | ||
743 | if (record_debug > 1) | |
744 | fprintf_unfiltered (gdb_stdlog, | |
745 | "Process record: record_mem %s to " | |
746 | "inferior addr = %s len = %d.\n", | |
747 | host_address_to_string (entry), | |
748 | paddress (gdbarch, entry->u.mem.addr), | |
749 | entry->u.mem.len); | |
750 | ||
4ffa4fc7 PA |
751 | if (record_read_memory (gdbarch, |
752 | entry->u.mem.addr, mem, entry->u.mem.len)) | |
753 | entry->u.mem.mem_entry_not_accessible = 1; | |
90ca0479 MS |
754 | else |
755 | { | |
756 | if (target_write_memory (entry->u.mem.addr, | |
757 | record_get_loc (entry), | |
758 | entry->u.mem.len)) | |
759 | { | |
760 | entry->u.mem.mem_entry_not_accessible = 1; | |
761 | if (record_debug) | |
7ea6d463 PM |
762 | warning (_("Process record: error writing memory at " |
763 | "addr = %s len = %d."), | |
90ca0479 MS |
764 | paddress (gdbarch, entry->u.mem.addr), |
765 | entry->u.mem.len); | |
766 | } | |
767 | else | |
9093389c PA |
768 | { |
769 | memcpy (record_get_loc (entry), mem, entry->u.mem.len); | |
770 | ||
771 | /* We've changed memory --- check if a hardware | |
772 | watchpoint should trap. Note that this | |
773 | presently assumes the target beneath supports | |
774 | continuable watchpoints. On non-continuable | |
775 | watchpoints target, we'll want to check this | |
776 | _before_ actually doing the memory change, and | |
777 | not doing the change at all if the watchpoint | |
778 | traps. */ | |
779 | if (hardware_watchpoint_inserted_in_range | |
780 | (get_regcache_aspace (regcache), | |
781 | entry->u.mem.addr, entry->u.mem.len)) | |
782 | record_hw_watchpoint = 1; | |
783 | } | |
90ca0479 MS |
784 | } |
785 | } | |
786 | } | |
787 | break; | |
788 | } | |
789 | } | |
790 | ||
27699eea MS |
791 | static struct target_ops *tmp_to_resume_ops; |
792 | static void (*tmp_to_resume) (struct target_ops *, ptid_t, int, | |
2ea28649 | 793 | enum gdb_signal); |
27699eea MS |
794 | static struct target_ops *tmp_to_wait_ops; |
795 | static ptid_t (*tmp_to_wait) (struct target_ops *, ptid_t, | |
796 | struct target_waitstatus *, | |
797 | int); | |
798 | static struct target_ops *tmp_to_store_registers_ops; | |
799 | static void (*tmp_to_store_registers) (struct target_ops *, | |
800 | struct regcache *, | |
801 | int regno); | |
802 | static struct target_ops *tmp_to_xfer_partial_ops; | |
803 | static LONGEST (*tmp_to_xfer_partial) (struct target_ops *ops, | |
804 | enum target_object object, | |
805 | const char *annex, | |
806 | gdb_byte *readbuf, | |
807 | const gdb_byte *writebuf, | |
808 | ULONGEST offset, | |
809 | LONGEST len); | |
810 | static int (*tmp_to_insert_breakpoint) (struct gdbarch *, | |
811 | struct bp_target_info *); | |
812 | static int (*tmp_to_remove_breakpoint) (struct gdbarch *, | |
813 | struct bp_target_info *); | |
9093389c PA |
814 | static int (*tmp_to_stopped_by_watchpoint) (void); |
815 | static int (*tmp_to_stopped_data_address) (struct target_ops *, CORE_ADDR *); | |
32231432 PA |
816 | static int (*tmp_to_stopped_data_address) (struct target_ops *, CORE_ADDR *); |
817 | static void (*tmp_to_async) (void (*) (enum inferior_event_type, void *), void *); | |
27699eea | 818 | |
0156b218 MS |
819 | static void record_restore (void); |
820 | ||
32231432 PA |
821 | /* Asynchronous signal handle registered as event loop source for when |
822 | we have pending events ready to be passed to the core. */ | |
823 | ||
824 | static struct async_event_handler *record_async_inferior_event_token; | |
825 | ||
826 | static void | |
827 | record_async_inferior_event_handler (gdb_client_data data) | |
828 | { | |
829 | inferior_event_handler (INF_REG_EVENT, NULL); | |
830 | } | |
831 | ||
27699eea | 832 | /* Open the process record target. */ |
6df67667 | 833 | |
69d05d38 | 834 | static void |
27699eea MS |
835 | record_core_open_1 (char *name, int from_tty) |
836 | { | |
837 | struct regcache *regcache = get_current_regcache (); | |
838 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
839 | int i; | |
840 | ||
841 | /* Get record_core_regbuf. */ | |
842 | target_fetch_registers (regcache, -1); | |
843 | record_core_regbuf = xmalloc (MAX_REGISTER_SIZE * regnum); | |
844 | for (i = 0; i < regnum; i ++) | |
845 | regcache_raw_collect (regcache, i, | |
846 | record_core_regbuf + MAX_REGISTER_SIZE * i); | |
847 | ||
848 | /* Get record_core_start and record_core_end. */ | |
849 | if (build_section_table (core_bfd, &record_core_start, &record_core_end)) | |
850 | { | |
851 | xfree (record_core_regbuf); | |
852 | record_core_regbuf = NULL; | |
853 | error (_("\"%s\": Can't find sections: %s"), | |
854 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
855 | } | |
856 | ||
857 | push_target (&record_core_ops); | |
0156b218 | 858 | record_restore (); |
27699eea MS |
859 | } |
860 | ||
861 | /* "to_open" target method for 'live' processes. */ | |
862 | ||
863 | static void | |
864 | record_open_1 (char *name, int from_tty) | |
69d05d38 | 865 | { |
69d05d38 HZ |
866 | if (record_debug) |
867 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
868 | ||
869 | /* check exec */ | |
870 | if (!target_has_execution) | |
871 | error (_("Process record: the program is not being run.")); | |
872 | if (non_stop) | |
873 | error (_("Process record target can't debug inferior in non-stop mode " | |
874 | "(non-stop).")); | |
69d05d38 | 875 | |
a97b0ac8 | 876 | if (!gdbarch_process_record_p (target_gdbarch)) |
69d05d38 HZ |
877 | error (_("Process record: the current architecture doesn't support " |
878 | "record function.")); | |
879 | ||
27699eea MS |
880 | if (!tmp_to_resume) |
881 | error (_("Could not find 'to_resume' method on the target stack.")); | |
882 | if (!tmp_to_wait) | |
883 | error (_("Could not find 'to_wait' method on the target stack.")); | |
884 | if (!tmp_to_store_registers) | |
3e43a32a MS |
885 | error (_("Could not find 'to_store_registers' " |
886 | "method on the target stack.")); | |
27699eea | 887 | if (!tmp_to_insert_breakpoint) |
3e43a32a MS |
888 | error (_("Could not find 'to_insert_breakpoint' " |
889 | "method on the target stack.")); | |
27699eea | 890 | if (!tmp_to_remove_breakpoint) |
3e43a32a MS |
891 | error (_("Could not find 'to_remove_breakpoint' " |
892 | "method on the target stack.")); | |
7155de5a | 893 | if (!tmp_to_stopped_by_watchpoint) |
3e43a32a MS |
894 | error (_("Could not find 'to_stopped_by_watchpoint' " |
895 | "method on the target stack.")); | |
7155de5a | 896 | if (!tmp_to_stopped_data_address) |
3e43a32a MS |
897 | error (_("Could not find 'to_stopped_data_address' " |
898 | "method on the target stack.")); | |
27699eea MS |
899 | |
900 | push_target (&record_ops); | |
901 | } | |
902 | ||
20388dd6 YQ |
903 | static void record_init_record_breakpoints (void); |
904 | ||
27699eea MS |
905 | /* "to_open" target method. Open the process record target. */ |
906 | ||
907 | static void | |
908 | record_open (char *name, int from_tty) | |
909 | { | |
910 | struct target_ops *t; | |
911 | ||
912 | if (record_debug) | |
913 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
914 | ||
69d05d38 HZ |
915 | /* Check if record target is already running. */ |
916 | if (current_target.to_stratum == record_stratum) | |
5d40bb85 HZ |
917 | error (_("Process record target already running. Use \"record stop\" to " |
918 | "stop record target first.")); | |
69d05d38 | 919 | |
27699eea MS |
920 | /* Reset the tmp beneath pointers. */ |
921 | tmp_to_resume_ops = NULL; | |
922 | tmp_to_resume = NULL; | |
923 | tmp_to_wait_ops = NULL; | |
924 | tmp_to_wait = NULL; | |
925 | tmp_to_store_registers_ops = NULL; | |
926 | tmp_to_store_registers = NULL; | |
927 | tmp_to_xfer_partial_ops = NULL; | |
928 | tmp_to_xfer_partial = NULL; | |
929 | tmp_to_insert_breakpoint = NULL; | |
930 | tmp_to_remove_breakpoint = NULL; | |
7155de5a HZ |
931 | tmp_to_stopped_by_watchpoint = NULL; |
932 | tmp_to_stopped_data_address = NULL; | |
32231432 | 933 | tmp_to_async = NULL; |
69d05d38 HZ |
934 | |
935 | /* Set the beneath function pointers. */ | |
936 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
937 | { | |
27699eea | 938 | if (!tmp_to_resume) |
69d05d38 | 939 | { |
27699eea MS |
940 | tmp_to_resume = t->to_resume; |
941 | tmp_to_resume_ops = t; | |
69d05d38 | 942 | } |
27699eea | 943 | if (!tmp_to_wait) |
69d05d38 | 944 | { |
27699eea MS |
945 | tmp_to_wait = t->to_wait; |
946 | tmp_to_wait_ops = t; | |
69d05d38 | 947 | } |
27699eea | 948 | if (!tmp_to_store_registers) |
69d05d38 | 949 | { |
27699eea MS |
950 | tmp_to_store_registers = t->to_store_registers; |
951 | tmp_to_store_registers_ops = t; | |
69d05d38 | 952 | } |
27699eea | 953 | if (!tmp_to_xfer_partial) |
69d05d38 | 954 | { |
27699eea MS |
955 | tmp_to_xfer_partial = t->to_xfer_partial; |
956 | tmp_to_xfer_partial_ops = t; | |
69d05d38 | 957 | } |
27699eea MS |
958 | if (!tmp_to_insert_breakpoint) |
959 | tmp_to_insert_breakpoint = t->to_insert_breakpoint; | |
960 | if (!tmp_to_remove_breakpoint) | |
961 | tmp_to_remove_breakpoint = t->to_remove_breakpoint; | |
9093389c PA |
962 | if (!tmp_to_stopped_by_watchpoint) |
963 | tmp_to_stopped_by_watchpoint = t->to_stopped_by_watchpoint; | |
964 | if (!tmp_to_stopped_data_address) | |
965 | tmp_to_stopped_data_address = t->to_stopped_data_address; | |
32231432 PA |
966 | if (!tmp_to_async) |
967 | tmp_to_async = t->to_async; | |
69d05d38 | 968 | } |
27699eea MS |
969 | if (!tmp_to_xfer_partial) |
970 | error (_("Could not find 'to_xfer_partial' method on the target stack.")); | |
69d05d38 HZ |
971 | |
972 | /* Reset */ | |
973 | record_insn_num = 0; | |
b54295a7 | 974 | record_insn_count = 0; |
69d05d38 HZ |
975 | record_list = &record_first; |
976 | record_list->next = NULL; | |
27699eea MS |
977 | |
978 | /* Set the tmp beneath pointers to beneath pointers. */ | |
979 | record_beneath_to_resume_ops = tmp_to_resume_ops; | |
980 | record_beneath_to_resume = tmp_to_resume; | |
981 | record_beneath_to_wait_ops = tmp_to_wait_ops; | |
982 | record_beneath_to_wait = tmp_to_wait; | |
983 | record_beneath_to_store_registers_ops = tmp_to_store_registers_ops; | |
984 | record_beneath_to_store_registers = tmp_to_store_registers; | |
985 | record_beneath_to_xfer_partial_ops = tmp_to_xfer_partial_ops; | |
986 | record_beneath_to_xfer_partial = tmp_to_xfer_partial; | |
987 | record_beneath_to_insert_breakpoint = tmp_to_insert_breakpoint; | |
988 | record_beneath_to_remove_breakpoint = tmp_to_remove_breakpoint; | |
9093389c PA |
989 | record_beneath_to_stopped_by_watchpoint = tmp_to_stopped_by_watchpoint; |
990 | record_beneath_to_stopped_data_address = tmp_to_stopped_data_address; | |
32231432 | 991 | record_beneath_to_async = tmp_to_async; |
27699eea | 992 | |
c0edd9ed | 993 | if (core_bfd) |
27699eea MS |
994 | record_core_open_1 (name, from_tty); |
995 | else | |
996 | record_open_1 (name, from_tty); | |
32231432 PA |
997 | |
998 | /* Register extra event sources in the event loop. */ | |
999 | record_async_inferior_event_token | |
1000 | = create_async_event_handler (record_async_inferior_event_handler, | |
1001 | NULL); | |
20388dd6 YQ |
1002 | |
1003 | record_init_record_breakpoints (); | |
69d05d38 HZ |
1004 | } |
1005 | ||
6df67667 MS |
1006 | /* "to_close" target method. Close the process record target. */ |
1007 | ||
69d05d38 HZ |
1008 | static void |
1009 | record_close (int quitting) | |
1010 | { | |
27699eea MS |
1011 | struct record_core_buf_entry *entry; |
1012 | ||
69d05d38 HZ |
1013 | if (record_debug) |
1014 | fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n"); | |
1015 | ||
1016 | record_list_release (record_list); | |
27699eea MS |
1017 | |
1018 | /* Release record_core_regbuf. */ | |
1019 | if (record_core_regbuf) | |
1020 | { | |
1021 | xfree (record_core_regbuf); | |
1022 | record_core_regbuf = NULL; | |
1023 | } | |
1024 | ||
1025 | /* Release record_core_buf_list. */ | |
1026 | if (record_core_buf_list) | |
1027 | { | |
1028 | for (entry = record_core_buf_list->prev; entry; entry = entry->prev) | |
1029 | { | |
1030 | xfree (record_core_buf_list); | |
1031 | record_core_buf_list = entry; | |
1032 | } | |
1033 | record_core_buf_list = NULL; | |
1034 | } | |
32231432 PA |
1035 | |
1036 | if (record_async_inferior_event_token) | |
1037 | delete_async_event_handler (&record_async_inferior_event_token); | |
69d05d38 HZ |
1038 | } |
1039 | ||
1040 | static int record_resume_step = 0; | |
69d05d38 | 1041 | |
32231432 PA |
1042 | /* True if we've been resumed, and so each record_wait call should |
1043 | advance execution. If this is false, record_wait will return a | |
1044 | TARGET_WAITKIND_IGNORE. */ | |
1045 | static int record_resumed = 0; | |
1046 | ||
1047 | /* The execution direction of the last resume we got. This is | |
1048 | necessary for async mode. Vis (order is not strictly accurate): | |
1049 | ||
1050 | 1. user has the global execution direction set to forward | |
1051 | 2. user does a reverse-step command | |
1052 | 3. record_resume is called with global execution direction | |
1053 | temporarily switched to reverse | |
1054 | 4. GDB's execution direction is reverted back to forward | |
1055 | 5. target record notifies event loop there's an event to handle | |
1056 | 6. infrun asks the target which direction was it going, and switches | |
1057 | the global execution direction accordingly (to reverse) | |
1058 | 7. infrun polls an event out of the record target, and handles it | |
1059 | 8. GDB goes back to the event loop, and goto #4. | |
1060 | */ | |
1061 | static enum exec_direction_kind record_execution_dir = EXEC_FORWARD; | |
1062 | ||
6df67667 MS |
1063 | /* "to_resume" target method. Resume the process record target. */ |
1064 | ||
69d05d38 HZ |
1065 | static void |
1066 | record_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1067 | enum gdb_signal signal) |
69d05d38 HZ |
1068 | { |
1069 | record_resume_step = step; | |
32231432 PA |
1070 | record_resumed = 1; |
1071 | record_execution_dir = execution_direction; | |
69d05d38 HZ |
1072 | |
1073 | if (!RECORD_IS_REPLAY) | |
1074 | { | |
f02253f1 HZ |
1075 | struct gdbarch *gdbarch = target_thread_architecture (ptid); |
1076 | ||
e6a386cd | 1077 | record_message (get_current_regcache (), signal); |
f02253f1 HZ |
1078 | |
1079 | if (!step) | |
1080 | { | |
1081 | /* This is not hard single step. */ | |
1082 | if (!gdbarch_software_single_step_p (gdbarch)) | |
1083 | { | |
1084 | /* This is a normal continue. */ | |
1085 | step = 1; | |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | /* This arch support soft sigle step. */ | |
1090 | if (single_step_breakpoints_inserted ()) | |
1091 | { | |
1092 | /* This is a soft single step. */ | |
1093 | record_resume_step = 1; | |
1094 | } | |
1095 | else | |
1096 | { | |
1097 | /* This is a continue. | |
1098 | Try to insert a soft single step breakpoint. */ | |
1099 | if (!gdbarch_software_single_step (gdbarch, | |
1100 | get_current_frame ())) | |
1101 | { | |
1102 | /* This system don't want use soft single step. | |
1103 | Use hard sigle step. */ | |
1104 | step = 1; | |
1105 | } | |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | ||
90f47860 PA |
1110 | /* Make sure the target beneath reports all signals. */ |
1111 | target_pass_signals (0, NULL); | |
1112 | ||
f02253f1 HZ |
1113 | record_beneath_to_resume (record_beneath_to_resume_ops, |
1114 | ptid, step, signal); | |
69d05d38 | 1115 | } |
32231432 PA |
1116 | |
1117 | /* We are about to start executing the inferior (or simulate it), | |
1118 | let's register it with the event loop. */ | |
1119 | if (target_can_async_p ()) | |
1120 | { | |
1121 | target_async (inferior_event_handler, 0); | |
1122 | /* Notify the event loop there's an event to wait for. We do | |
1123 | most of the work in record_wait. */ | |
1124 | mark_async_event_handler (record_async_inferior_event_token); | |
1125 | } | |
69d05d38 HZ |
1126 | } |
1127 | ||
1128 | static int record_get_sig = 0; | |
1129 | ||
6df67667 MS |
1130 | /* SIGINT signal handler, registered by "to_wait" method. */ |
1131 | ||
69d05d38 HZ |
1132 | static void |
1133 | record_sig_handler (int signo) | |
1134 | { | |
1135 | if (record_debug) | |
1136 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1137 | ||
1138 | /* It will break the running inferior in replay mode. */ | |
1139 | record_resume_step = 1; | |
1140 | ||
1141 | /* It will let record_wait set inferior status to get the signal | |
1142 | SIGINT. */ | |
1143 | record_get_sig = 1; | |
1144 | } | |
1145 | ||
1146 | static void | |
1147 | record_wait_cleanups (void *ignore) | |
1148 | { | |
1149 | if (execution_direction == EXEC_REVERSE) | |
1150 | { | |
1151 | if (record_list->next) | |
1152 | record_list = record_list->next; | |
1153 | } | |
1154 | else | |
1155 | record_list = record_list->prev; | |
1156 | } | |
1157 | ||
6df67667 MS |
1158 | /* "to_wait" target method for process record target. |
1159 | ||
1160 | In record mode, the target is always run in singlestep mode | |
1161 | (even when gdb says to continue). The to_wait method intercepts | |
1162 | the stop events and determines which ones are to be passed on to | |
1163 | gdb. Most stop events are just singlestep events that gdb is not | |
1164 | to know about, so the to_wait method just records them and keeps | |
1165 | singlestepping. | |
1166 | ||
1167 | In replay mode, this function emulates the recorded execution log, | |
1168 | one instruction at a time (forward or backward), and determines | |
1169 | where to stop. */ | |
69d05d38 HZ |
1170 | |
1171 | static ptid_t | |
32231432 PA |
1172 | record_wait_1 (struct target_ops *ops, |
1173 | ptid_t ptid, struct target_waitstatus *status, | |
1174 | int options) | |
69d05d38 HZ |
1175 | { |
1176 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
1177 | ||
1178 | if (record_debug) | |
1179 | fprintf_unfiltered (gdb_stdlog, | |
1180 | "Process record: record_wait " | |
32231432 PA |
1181 | "record_resume_step = %d, record_resumed = %d, direction=%s\n", |
1182 | record_resume_step, record_resumed, | |
1183 | record_execution_dir == EXEC_FORWARD ? "forward" : "reverse"); | |
1184 | ||
1185 | if (!record_resumed) | |
1186 | { | |
1187 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1188 | ||
1189 | /* No interesting event. */ | |
1190 | status->kind = TARGET_WAITKIND_IGNORE; | |
1191 | return minus_one_ptid; | |
1192 | } | |
69d05d38 | 1193 | |
eaaffdf4 HZ |
1194 | record_get_sig = 0; |
1195 | signal (SIGINT, record_sig_handler); | |
1196 | ||
27699eea | 1197 | if (!RECORD_IS_REPLAY && ops != &record_core_ops) |
69d05d38 | 1198 | { |
69d05d38 HZ |
1199 | if (record_resume_step) |
1200 | { | |
1201 | /* This is a single step. */ | |
1202 | return record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 1203 | ptid, status, options); |
69d05d38 HZ |
1204 | } |
1205 | else | |
1206 | { | |
1207 | /* This is not a single step. */ | |
1208 | ptid_t ret; | |
1209 | CORE_ADDR tmp_pc; | |
f02253f1 | 1210 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); |
69d05d38 HZ |
1211 | |
1212 | while (1) | |
1213 | { | |
1214 | ret = record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 1215 | ptid, status, options); |
32231432 PA |
1216 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1217 | { | |
1218 | if (record_debug) | |
1219 | fprintf_unfiltered (gdb_stdlog, | |
1220 | "Process record: record_wait " | |
1221 | "target beneath not done yet\n"); | |
1222 | return ret; | |
1223 | } | |
69d05d38 | 1224 | |
f02253f1 HZ |
1225 | if (single_step_breakpoints_inserted ()) |
1226 | remove_single_step_breakpoints (); | |
1227 | ||
eaaffdf4 | 1228 | if (record_resume_step) |
32231432 | 1229 | return ret; |
eaaffdf4 | 1230 | |
8b739a96 | 1231 | /* Is this a SIGTRAP? */ |
69d05d38 | 1232 | if (status->kind == TARGET_WAITKIND_STOPPED |
a493e3e2 | 1233 | && status->value.sig == GDB_SIGNAL_TRAP) |
69d05d38 | 1234 | { |
6c95b8df | 1235 | struct regcache *regcache; |
a9840291 | 1236 | struct address_space *aspace; |
6c95b8df | 1237 | |
9093389c PA |
1238 | /* Yes -- this is likely our single-step finishing, |
1239 | but check if there's any reason the core would be | |
1240 | interested in the event. */ | |
1241 | ||
69d05d38 | 1242 | registers_changed (); |
6c95b8df PA |
1243 | regcache = get_current_regcache (); |
1244 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1245 | aspace = get_regcache_aspace (regcache); |
9093389c PA |
1246 | |
1247 | if (target_stopped_by_watchpoint ()) | |
1248 | { | |
1249 | /* Always interested in watchpoints. */ | |
1250 | } | |
a9840291 | 1251 | else if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1252 | { |
9093389c PA |
1253 | /* There is a breakpoint here. Let the core |
1254 | handle it. */ | |
a9840291 PA |
1255 | if (software_breakpoint_inserted_here_p (aspace, tmp_pc)) |
1256 | { | |
3e43a32a MS |
1257 | struct gdbarch *gdbarch |
1258 | = get_regcache_arch (regcache); | |
a9840291 PA |
1259 | CORE_ADDR decr_pc_after_break |
1260 | = gdbarch_decr_pc_after_break (gdbarch); | |
1261 | if (decr_pc_after_break) | |
1262 | regcache_write_pc (regcache, | |
1263 | tmp_pc + decr_pc_after_break); | |
1264 | } | |
69d05d38 HZ |
1265 | } |
1266 | else | |
1267 | { | |
f02253f1 HZ |
1268 | /* This is a single-step trap. Record the |
1269 | insn and issue another step. | |
1270 | FIXME: this part can be a random SIGTRAP too. | |
1271 | But GDB cannot handle it. */ | |
1272 | int step = 1; | |
1273 | ||
e6a386cd | 1274 | if (!record_message_wrapper_safe (regcache, |
a493e3e2 | 1275 | GDB_SIGNAL_0)) |
e6a386cd HZ |
1276 | { |
1277 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1278 | status->value.sig = GDB_SIGNAL_0; |
e6a386cd HZ |
1279 | break; |
1280 | } | |
6c95b8df | 1281 | |
f02253f1 HZ |
1282 | if (gdbarch_software_single_step_p (gdbarch)) |
1283 | { | |
1284 | /* Try to insert the software single step breakpoint. | |
1285 | If insert success, set step to 0. */ | |
1286 | set_executing (inferior_ptid, 0); | |
1287 | reinit_frame_cache (); | |
1288 | if (gdbarch_software_single_step (gdbarch, | |
1289 | get_current_frame ())) | |
1290 | step = 0; | |
1291 | set_executing (inferior_ptid, 1); | |
1292 | } | |
1293 | ||
32231432 PA |
1294 | if (record_debug) |
1295 | fprintf_unfiltered (gdb_stdlog, | |
1296 | "Process record: record_wait " | |
1297 | "issuing one more step in the target beneath\n"); | |
69d05d38 | 1298 | record_beneath_to_resume (record_beneath_to_resume_ops, |
f02253f1 | 1299 | ptid, step, |
a493e3e2 | 1300 | GDB_SIGNAL_0); |
69d05d38 HZ |
1301 | continue; |
1302 | } | |
1303 | } | |
1304 | ||
1305 | /* The inferior is broken by a breakpoint or a signal. */ | |
1306 | break; | |
1307 | } | |
1308 | ||
1309 | return ret; | |
1310 | } | |
1311 | } | |
1312 | else | |
1313 | { | |
1314 | struct regcache *regcache = get_current_regcache (); | |
5af949e3 | 1315 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
a9840291 | 1316 | struct address_space *aspace = get_regcache_aspace (regcache); |
69d05d38 HZ |
1317 | int continue_flag = 1; |
1318 | int first_record_end = 1; | |
1319 | struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0); | |
1320 | CORE_ADDR tmp_pc; | |
1321 | ||
9093389c | 1322 | record_hw_watchpoint = 0; |
69d05d38 HZ |
1323 | status->kind = TARGET_WAITKIND_STOPPED; |
1324 | ||
1325 | /* Check breakpoint when forward execute. */ | |
1326 | if (execution_direction == EXEC_FORWARD) | |
1327 | { | |
1328 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1329 | if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1330 | { |
a9840291 PA |
1331 | int decr_pc_after_break = gdbarch_decr_pc_after_break (gdbarch); |
1332 | ||
69d05d38 HZ |
1333 | if (record_debug) |
1334 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 UW |
1335 | "Process record: break at %s.\n", |
1336 | paddress (gdbarch, tmp_pc)); | |
a9840291 PA |
1337 | |
1338 | if (decr_pc_after_break | |
1339 | && !record_resume_step | |
1340 | && software_breakpoint_inserted_here_p (aspace, tmp_pc)) | |
69d05d38 | 1341 | regcache_write_pc (regcache, |
a9840291 | 1342 | tmp_pc + decr_pc_after_break); |
69d05d38 HZ |
1343 | goto replay_out; |
1344 | } | |
1345 | } | |
1346 | ||
69d05d38 HZ |
1347 | /* If GDB is in terminal_inferior mode, it will not get the signal. |
1348 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1349 | mode, because inferior will not executed. | |
1350 | Then set it to terminal_ours to make GDB get the signal. */ | |
1351 | target_terminal_ours (); | |
1352 | ||
1353 | /* In EXEC_FORWARD mode, record_list points to the tail of prev | |
1354 | instruction. */ | |
1355 | if (execution_direction == EXEC_FORWARD && record_list->next) | |
1356 | record_list = record_list->next; | |
1357 | ||
1358 | /* Loop over the record_list, looking for the next place to | |
1359 | stop. */ | |
1360 | do | |
1361 | { | |
1362 | /* Check for beginning and end of log. */ | |
1363 | if (execution_direction == EXEC_REVERSE | |
1364 | && record_list == &record_first) | |
1365 | { | |
1366 | /* Hit beginning of record log in reverse. */ | |
1367 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1368 | break; | |
1369 | } | |
1370 | if (execution_direction != EXEC_REVERSE && !record_list->next) | |
1371 | { | |
1372 | /* Hit end of record log going forward. */ | |
1373 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1374 | break; | |
1375 | } | |
1376 | ||
90ca0479 MS |
1377 | record_exec_insn (regcache, gdbarch, record_list); |
1378 | ||
1379 | if (record_list->type == record_end) | |
69d05d38 HZ |
1380 | { |
1381 | if (record_debug > 1) | |
1382 | fprintf_unfiltered (gdb_stdlog, | |
1383 | "Process record: record_end %s to " | |
1384 | "inferior.\n", | |
1385 | host_address_to_string (record_list)); | |
1386 | ||
1387 | if (first_record_end && execution_direction == EXEC_REVERSE) | |
1388 | { | |
1389 | /* When reverse excute, the first record_end is the part of | |
1390 | current instruction. */ | |
1391 | first_record_end = 0; | |
1392 | } | |
1393 | else | |
1394 | { | |
1395 | /* In EXEC_REVERSE mode, this is the record_end of prev | |
1396 | instruction. | |
1397 | In EXEC_FORWARD mode, this is the record_end of current | |
1398 | instruction. */ | |
1399 | /* step */ | |
1400 | if (record_resume_step) | |
1401 | { | |
1402 | if (record_debug > 1) | |
1403 | fprintf_unfiltered (gdb_stdlog, | |
1404 | "Process record: step.\n"); | |
1405 | continue_flag = 0; | |
1406 | } | |
1407 | ||
1408 | /* check breakpoint */ | |
1409 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1410 | if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1411 | { |
a9840291 PA |
1412 | int decr_pc_after_break |
1413 | = gdbarch_decr_pc_after_break (gdbarch); | |
1414 | ||
69d05d38 HZ |
1415 | if (record_debug) |
1416 | fprintf_unfiltered (gdb_stdlog, | |
1417 | "Process record: break " | |
5af949e3 UW |
1418 | "at %s.\n", |
1419 | paddress (gdbarch, tmp_pc)); | |
a9840291 | 1420 | if (decr_pc_after_break |
69d05d38 | 1421 | && execution_direction == EXEC_FORWARD |
a9840291 PA |
1422 | && !record_resume_step |
1423 | && software_breakpoint_inserted_here_p (aspace, | |
1424 | tmp_pc)) | |
69d05d38 | 1425 | regcache_write_pc (regcache, |
a9840291 | 1426 | tmp_pc + decr_pc_after_break); |
69d05d38 HZ |
1427 | continue_flag = 0; |
1428 | } | |
9093389c PA |
1429 | |
1430 | if (record_hw_watchpoint) | |
1431 | { | |
1432 | if (record_debug) | |
3e43a32a MS |
1433 | fprintf_unfiltered (gdb_stdlog, |
1434 | "Process record: hit hw " | |
1435 | "watchpoint.\n"); | |
9093389c PA |
1436 | continue_flag = 0; |
1437 | } | |
8b739a96 | 1438 | /* Check target signal */ |
a493e3e2 | 1439 | if (record_list->u.end.sigval != GDB_SIGNAL_0) |
8b739a96 HZ |
1440 | /* FIXME: better way to check */ |
1441 | continue_flag = 0; | |
69d05d38 HZ |
1442 | } |
1443 | } | |
1444 | ||
1445 | if (continue_flag) | |
1446 | { | |
1447 | if (execution_direction == EXEC_REVERSE) | |
1448 | { | |
1449 | if (record_list->prev) | |
1450 | record_list = record_list->prev; | |
1451 | } | |
1452 | else | |
1453 | { | |
1454 | if (record_list->next) | |
1455 | record_list = record_list->next; | |
1456 | } | |
1457 | } | |
1458 | } | |
1459 | while (continue_flag); | |
1460 | ||
69d05d38 HZ |
1461 | replay_out: |
1462 | if (record_get_sig) | |
a493e3e2 PA |
1463 | status->value.sig = GDB_SIGNAL_INT; |
1464 | else if (record_list->u.end.sigval != GDB_SIGNAL_0) | |
8b739a96 HZ |
1465 | /* FIXME: better way to check */ |
1466 | status->value.sig = record_list->u.end.sigval; | |
69d05d38 | 1467 | else |
a493e3e2 | 1468 | status->value.sig = GDB_SIGNAL_TRAP; |
69d05d38 HZ |
1469 | |
1470 | discard_cleanups (old_cleanups); | |
1471 | } | |
1472 | ||
eaaffdf4 HZ |
1473 | signal (SIGINT, handle_sigint); |
1474 | ||
69d05d38 HZ |
1475 | do_cleanups (set_cleanups); |
1476 | return inferior_ptid; | |
1477 | } | |
1478 | ||
32231432 PA |
1479 | static ptid_t |
1480 | record_wait (struct target_ops *ops, | |
1481 | ptid_t ptid, struct target_waitstatus *status, | |
1482 | int options) | |
1483 | { | |
1484 | ptid_t return_ptid; | |
1485 | ||
1486 | return_ptid = record_wait_1 (ops, ptid, status, options); | |
1487 | if (status->kind != TARGET_WAITKIND_IGNORE) | |
1488 | { | |
1489 | /* We're reporting a stop. Make sure any spurious | |
1490 | target_wait(WNOHANG) doesn't advance the target until the | |
1491 | core wants us resumed again. */ | |
1492 | record_resumed = 0; | |
1493 | } | |
1494 | return return_ptid; | |
1495 | } | |
1496 | ||
9093389c PA |
1497 | static int |
1498 | record_stopped_by_watchpoint (void) | |
1499 | { | |
1500 | if (RECORD_IS_REPLAY) | |
1501 | return record_hw_watchpoint; | |
1502 | else | |
1503 | return record_beneath_to_stopped_by_watchpoint (); | |
1504 | } | |
1505 | ||
1506 | static int | |
1507 | record_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) | |
1508 | { | |
1509 | if (RECORD_IS_REPLAY) | |
1510 | return 0; | |
1511 | else | |
1512 | return record_beneath_to_stopped_data_address (ops, addr_p); | |
1513 | } | |
1514 | ||
6df67667 MS |
1515 | /* "to_disconnect" method for process record target. */ |
1516 | ||
69d05d38 HZ |
1517 | static void |
1518 | record_disconnect (struct target_ops *target, char *args, int from_tty) | |
1519 | { | |
1520 | if (record_debug) | |
1521 | fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n"); | |
1522 | ||
1523 | unpush_target (&record_ops); | |
1524 | target_disconnect (args, from_tty); | |
1525 | } | |
1526 | ||
6df67667 MS |
1527 | /* "to_detach" method for process record target. */ |
1528 | ||
69d05d38 HZ |
1529 | static void |
1530 | record_detach (struct target_ops *ops, char *args, int from_tty) | |
1531 | { | |
1532 | if (record_debug) | |
1533 | fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n"); | |
1534 | ||
1535 | unpush_target (&record_ops); | |
1536 | target_detach (args, from_tty); | |
1537 | } | |
1538 | ||
6df67667 MS |
1539 | /* "to_mourn_inferior" method for process record target. */ |
1540 | ||
69d05d38 HZ |
1541 | static void |
1542 | record_mourn_inferior (struct target_ops *ops) | |
1543 | { | |
1544 | if (record_debug) | |
1545 | fprintf_unfiltered (gdb_stdlog, "Process record: " | |
1546 | "record_mourn_inferior\n"); | |
1547 | ||
1548 | unpush_target (&record_ops); | |
1549 | target_mourn_inferior (); | |
1550 | } | |
1551 | ||
1552 | /* Close process record target before killing the inferior process. */ | |
1553 | ||
1554 | static void | |
1555 | record_kill (struct target_ops *ops) | |
1556 | { | |
1557 | if (record_debug) | |
1558 | fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n"); | |
1559 | ||
1560 | unpush_target (&record_ops); | |
1561 | target_kill (); | |
1562 | } | |
1563 | ||
1564 | /* Record registers change (by user or by GDB) to list as an instruction. */ | |
1565 | ||
1566 | static void | |
1567 | record_registers_change (struct regcache *regcache, int regnum) | |
1568 | { | |
1569 | /* Check record_insn_num. */ | |
1570 | record_check_insn_num (0); | |
1571 | ||
1572 | record_arch_list_head = NULL; | |
1573 | record_arch_list_tail = NULL; | |
1574 | ||
1575 | if (regnum < 0) | |
1576 | { | |
1577 | int i; | |
123f5f96 | 1578 | |
69d05d38 HZ |
1579 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
1580 | { | |
1581 | if (record_arch_list_add_reg (regcache, i)) | |
1582 | { | |
1583 | record_list_release (record_arch_list_tail); | |
1584 | error (_("Process record: failed to record execution log.")); | |
1585 | } | |
1586 | } | |
1587 | } | |
1588 | else | |
1589 | { | |
1590 | if (record_arch_list_add_reg (regcache, regnum)) | |
1591 | { | |
1592 | record_list_release (record_arch_list_tail); | |
1593 | error (_("Process record: failed to record execution log.")); | |
1594 | } | |
1595 | } | |
1596 | if (record_arch_list_add_end ()) | |
1597 | { | |
1598 | record_list_release (record_arch_list_tail); | |
1599 | error (_("Process record: failed to record execution log.")); | |
1600 | } | |
1601 | record_list->next = record_arch_list_head; | |
1602 | record_arch_list_head->prev = record_list; | |
1603 | record_list = record_arch_list_tail; | |
1604 | ||
1605 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1606 | record_list_release_first (); | |
1607 | else | |
1608 | record_insn_num++; | |
1609 | } | |
1610 | ||
6df67667 MS |
1611 | /* "to_store_registers" method for process record target. */ |
1612 | ||
69d05d38 HZ |
1613 | static void |
1614 | record_store_registers (struct target_ops *ops, struct regcache *regcache, | |
1615 | int regno) | |
1616 | { | |
1617 | if (!record_gdb_operation_disable) | |
1618 | { | |
1619 | if (RECORD_IS_REPLAY) | |
1620 | { | |
1621 | int n; | |
69d05d38 HZ |
1622 | |
1623 | /* Let user choose if he wants to write register or not. */ | |
1624 | if (regno < 0) | |
1625 | n = | |
604ad007 JB |
1626 | query (_("Because GDB is in replay mode, changing the " |
1627 | "value of a register will make the execution " | |
1628 | "log unusable from this point onward. " | |
1629 | "Change all registers?")); | |
69d05d38 HZ |
1630 | else |
1631 | n = | |
604ad007 JB |
1632 | query (_("Because GDB is in replay mode, changing the value " |
1633 | "of a register will make the execution log unusable " | |
1634 | "from this point onward. Change register %s?"), | |
69d05d38 HZ |
1635 | gdbarch_register_name (get_regcache_arch (regcache), |
1636 | regno)); | |
1637 | ||
1638 | if (!n) | |
1639 | { | |
1640 | /* Invalidate the value of regcache that was set in function | |
1641 | "regcache_raw_write". */ | |
1642 | if (regno < 0) | |
1643 | { | |
1644 | int i; | |
123f5f96 | 1645 | |
69d05d38 HZ |
1646 | for (i = 0; |
1647 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1648 | i++) | |
1649 | regcache_invalidate (regcache, i); | |
1650 | } | |
1651 | else | |
1652 | regcache_invalidate (regcache, regno); | |
1653 | ||
1654 | error (_("Process record canceled the operation.")); | |
1655 | } | |
1656 | ||
1657 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1658 | record_list_release_following (record_list); |
69d05d38 HZ |
1659 | } |
1660 | ||
1661 | record_registers_change (regcache, regno); | |
1662 | } | |
1663 | record_beneath_to_store_registers (record_beneath_to_store_registers_ops, | |
1664 | regcache, regno); | |
1665 | } | |
1666 | ||
27699eea | 1667 | /* "to_xfer_partial" method. Behavior is conditional on RECORD_IS_REPLAY. |
69d05d38 HZ |
1668 | In replay mode, we cannot write memory unles we are willing to |
1669 | invalidate the record/replay log from this point forward. */ | |
1670 | ||
1671 | static LONGEST | |
1672 | record_xfer_partial (struct target_ops *ops, enum target_object object, | |
1673 | const char *annex, gdb_byte *readbuf, | |
1674 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
1675 | { | |
1676 | if (!record_gdb_operation_disable | |
1677 | && (object == TARGET_OBJECT_MEMORY | |
1678 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1679 | { | |
1680 | if (RECORD_IS_REPLAY) | |
1681 | { | |
1682 | /* Let user choose if he wants to write memory or not. */ | |
604ad007 JB |
1683 | if (!query (_("Because GDB is in replay mode, writing to memory " |
1684 | "will make the execution log unusable from this " | |
1685 | "point onward. Write memory at address %s?"), | |
5af949e3 | 1686 | paddress (target_gdbarch, offset))) |
9a9dc473 | 1687 | error (_("Process record canceled the operation.")); |
69d05d38 HZ |
1688 | |
1689 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1690 | record_list_release_following (record_list); |
69d05d38 HZ |
1691 | } |
1692 | ||
1693 | /* Check record_insn_num */ | |
1694 | record_check_insn_num (0); | |
1695 | ||
1696 | /* Record registers change to list as an instruction. */ | |
1697 | record_arch_list_head = NULL; | |
1698 | record_arch_list_tail = NULL; | |
1699 | if (record_arch_list_add_mem (offset, len)) | |
1700 | { | |
1701 | record_list_release (record_arch_list_tail); | |
1702 | if (record_debug) | |
1703 | fprintf_unfiltered (gdb_stdlog, | |
0156b218 MS |
1704 | "Process record: failed to record " |
1705 | "execution log."); | |
69d05d38 HZ |
1706 | return -1; |
1707 | } | |
1708 | if (record_arch_list_add_end ()) | |
1709 | { | |
1710 | record_list_release (record_arch_list_tail); | |
1711 | if (record_debug) | |
1712 | fprintf_unfiltered (gdb_stdlog, | |
0156b218 MS |
1713 | "Process record: failed to record " |
1714 | "execution log."); | |
69d05d38 HZ |
1715 | return -1; |
1716 | } | |
1717 | record_list->next = record_arch_list_head; | |
1718 | record_arch_list_head->prev = record_list; | |
1719 | record_list = record_arch_list_tail; | |
1720 | ||
1721 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1722 | record_list_release_first (); | |
1723 | else | |
1724 | record_insn_num++; | |
1725 | } | |
1726 | ||
1727 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
1728 | object, annex, readbuf, writebuf, | |
1729 | offset, len); | |
1730 | } | |
1731 | ||
0695b514 PA |
1732 | /* This structure represents a breakpoint inserted while the record |
1733 | target is active. We use this to know when to install/remove | |
1734 | breakpoints in/from the target beneath. For example, a breakpoint | |
1735 | may be inserted while recording, but removed when not replaying nor | |
1736 | recording. In that case, the breakpoint had not been inserted on | |
1737 | the target beneath, so we should not try to remove it there. */ | |
1738 | ||
1739 | struct record_breakpoint | |
1740 | { | |
1741 | /* The address and address space the breakpoint was set at. */ | |
1742 | struct address_space *address_space; | |
1743 | CORE_ADDR addr; | |
1744 | ||
1745 | /* True when the breakpoint has been also installed in the target | |
1746 | beneath. This will be false for breakpoints set during replay or | |
1747 | when recording. */ | |
1748 | int in_target_beneath; | |
1749 | }; | |
1750 | ||
1751 | typedef struct record_breakpoint *record_breakpoint_p; | |
1752 | DEF_VEC_P(record_breakpoint_p); | |
1753 | ||
1754 | /* The list of breakpoints inserted while the record target is | |
1755 | active. */ | |
1756 | VEC(record_breakpoint_p) *record_breakpoints = NULL; | |
1757 | ||
20388dd6 YQ |
1758 | static void |
1759 | record_sync_record_breakpoints (struct bp_location *loc, void *data) | |
1760 | { | |
1761 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1762 | return; | |
1763 | ||
1764 | if (loc->inserted) | |
1765 | { | |
1766 | struct record_breakpoint *bp = XNEW (struct record_breakpoint); | |
1767 | ||
1768 | bp->addr = loc->target_info.placed_address; | |
1769 | bp->address_space = loc->target_info.placed_address_space; | |
1770 | ||
1771 | bp->in_target_beneath = 1; | |
1772 | ||
1773 | VEC_safe_push (record_breakpoint_p, record_breakpoints, bp); | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | /* Sync existing breakpoints to record_breakpoints. */ | |
1778 | ||
1779 | static void | |
1780 | record_init_record_breakpoints (void) | |
1781 | { | |
1782 | VEC_free (record_breakpoint_p, record_breakpoints); | |
1783 | ||
1784 | iterate_over_bp_locations (record_sync_record_breakpoints); | |
1785 | } | |
1786 | ||
0695b514 PA |
1787 | /* Behavior is conditional on RECORD_IS_REPLAY. We will not actually |
1788 | insert or remove breakpoints in the real target when replaying, nor | |
1789 | when recording. */ | |
69d05d38 HZ |
1790 | |
1791 | static int | |
a6d9a66e UW |
1792 | record_insert_breakpoint (struct gdbarch *gdbarch, |
1793 | struct bp_target_info *bp_tgt) | |
69d05d38 | 1794 | { |
0695b514 PA |
1795 | struct record_breakpoint *bp; |
1796 | int in_target_beneath = 0; | |
1797 | ||
69d05d38 HZ |
1798 | if (!RECORD_IS_REPLAY) |
1799 | { | |
0695b514 PA |
1800 | /* When recording, we currently always single-step, so we don't |
1801 | really need to install regular breakpoints in the inferior. | |
1802 | However, we do have to insert software single-step | |
1803 | breakpoints, in case the target can't hardware step. To keep | |
1804 | things single, we always insert. */ | |
1805 | struct cleanup *old_cleanups; | |
1806 | int ret; | |
1807 | ||
1808 | old_cleanups = record_gdb_operation_disable_set (); | |
1809 | ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt); | |
69d05d38 HZ |
1810 | do_cleanups (old_cleanups); |
1811 | ||
0695b514 PA |
1812 | if (ret != 0) |
1813 | return ret; | |
1814 | ||
1815 | in_target_beneath = 1; | |
69d05d38 HZ |
1816 | } |
1817 | ||
0695b514 PA |
1818 | bp = XNEW (struct record_breakpoint); |
1819 | bp->addr = bp_tgt->placed_address; | |
1820 | bp->address_space = bp_tgt->placed_address_space; | |
1821 | bp->in_target_beneath = in_target_beneath; | |
1822 | VEC_safe_push (record_breakpoint_p, record_breakpoints, bp); | |
69d05d38 HZ |
1823 | return 0; |
1824 | } | |
1825 | ||
6df67667 MS |
1826 | /* "to_remove_breakpoint" method for process record target. */ |
1827 | ||
69d05d38 | 1828 | static int |
a6d9a66e UW |
1829 | record_remove_breakpoint (struct gdbarch *gdbarch, |
1830 | struct bp_target_info *bp_tgt) | |
69d05d38 | 1831 | { |
0695b514 PA |
1832 | struct record_breakpoint *bp; |
1833 | int ix; | |
1834 | ||
1835 | for (ix = 0; | |
1836 | VEC_iterate (record_breakpoint_p, record_breakpoints, ix, bp); | |
1837 | ++ix) | |
69d05d38 | 1838 | { |
0695b514 PA |
1839 | if (bp->addr == bp_tgt->placed_address |
1840 | && bp->address_space == bp_tgt->placed_address_space) | |
1841 | { | |
1842 | if (bp->in_target_beneath) | |
1843 | { | |
1844 | struct cleanup *old_cleanups; | |
1845 | int ret; | |
69d05d38 | 1846 | |
0695b514 PA |
1847 | old_cleanups = record_gdb_operation_disable_set (); |
1848 | ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt); | |
1849 | do_cleanups (old_cleanups); | |
69d05d38 | 1850 | |
0695b514 PA |
1851 | if (ret != 0) |
1852 | return ret; | |
1853 | } | |
1854 | ||
1855 | VEC_unordered_remove (record_breakpoint_p, record_breakpoints, ix); | |
1856 | return 0; | |
1857 | } | |
69d05d38 HZ |
1858 | } |
1859 | ||
0695b514 | 1860 | gdb_assert_not_reached ("removing unknown breakpoint"); |
69d05d38 HZ |
1861 | } |
1862 | ||
6df67667 | 1863 | /* "to_can_execute_reverse" method for process record target. */ |
27699eea | 1864 | |
69d05d38 HZ |
1865 | static int |
1866 | record_can_execute_reverse (void) | |
1867 | { | |
1868 | return 1; | |
1869 | } | |
1870 | ||
6b04bdb7 MS |
1871 | /* "to_get_bookmark" method for process record and prec over core. */ |
1872 | ||
1873 | static gdb_byte * | |
1874 | record_get_bookmark (char *args, int from_tty) | |
1875 | { | |
1876 | gdb_byte *ret = NULL; | |
1877 | ||
1878 | /* Return stringified form of instruction count. */ | |
1879 | if (record_list && record_list->type == record_end) | |
1880 | ret = xstrdup (pulongest (record_list->u.end.insn_num)); | |
1881 | ||
1882 | if (record_debug) | |
1883 | { | |
1884 | if (ret) | |
1885 | fprintf_unfiltered (gdb_stdlog, | |
1886 | "record_get_bookmark returns %s\n", ret); | |
1887 | else | |
1888 | fprintf_unfiltered (gdb_stdlog, | |
1889 | "record_get_bookmark returns NULL\n"); | |
1890 | } | |
1891 | return ret; | |
1892 | } | |
1893 | ||
1894 | /* The implementation of the command "record goto". */ | |
1895 | static void cmd_record_goto (char *, int); | |
1896 | ||
1897 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1898 | ||
1899 | static void | |
1900 | record_goto_bookmark (gdb_byte *bookmark, int from_tty) | |
1901 | { | |
1902 | if (record_debug) | |
1903 | fprintf_unfiltered (gdb_stdlog, | |
1904 | "record_goto_bookmark receives %s\n", bookmark); | |
1905 | ||
1906 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1907 | { | |
1908 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) | |
1909 | error (_("Unbalanced quotes: %s"), bookmark); | |
1910 | ||
1911 | /* Strip trailing quote. */ | |
1912 | bookmark[strlen (bookmark) - 1] = '\0'; | |
1913 | /* Strip leading quote. */ | |
1914 | bookmark++; | |
1915 | /* Pass along to cmd_record_goto. */ | |
1916 | } | |
1917 | ||
1918 | cmd_record_goto ((char *) bookmark, from_tty); | |
1919 | return; | |
1920 | } | |
1921 | ||
32231432 PA |
1922 | static void |
1923 | record_async (void (*callback) (enum inferior_event_type event_type, | |
1924 | void *context), void *context) | |
1925 | { | |
32231432 PA |
1926 | /* If we're on top of a line target (e.g., linux-nat, remote), then |
1927 | set it to async mode as well. Will be NULL if we're sitting on | |
1928 | top of the core target, for "record restore". */ | |
1929 | if (record_beneath_to_async != NULL) | |
1930 | record_beneath_to_async (callback, context); | |
1931 | } | |
1932 | ||
32231432 PA |
1933 | static int |
1934 | record_can_async_p (void) | |
1935 | { | |
1936 | /* We only enable async when the user specifically asks for it. */ | |
3dd5b83d | 1937 | return target_async_permitted; |
32231432 PA |
1938 | } |
1939 | ||
1940 | static int | |
1941 | record_is_async_p (void) | |
1942 | { | |
1943 | /* We only enable async when the user specifically asks for it. */ | |
3dd5b83d | 1944 | return target_async_permitted; |
32231432 PA |
1945 | } |
1946 | ||
1947 | static enum exec_direction_kind | |
1948 | record_execution_direction (void) | |
1949 | { | |
1950 | return record_execution_dir; | |
1951 | } | |
1952 | ||
69d05d38 HZ |
1953 | static void |
1954 | init_record_ops (void) | |
1955 | { | |
1956 | record_ops.to_shortname = "record"; | |
1957 | record_ops.to_longname = "Process record and replay target"; | |
1958 | record_ops.to_doc = | |
1959 | "Log program while executing and replay execution from log."; | |
1960 | record_ops.to_open = record_open; | |
1961 | record_ops.to_close = record_close; | |
1962 | record_ops.to_resume = record_resume; | |
1963 | record_ops.to_wait = record_wait; | |
1964 | record_ops.to_disconnect = record_disconnect; | |
1965 | record_ops.to_detach = record_detach; | |
1966 | record_ops.to_mourn_inferior = record_mourn_inferior; | |
1967 | record_ops.to_kill = record_kill; | |
1968 | record_ops.to_create_inferior = find_default_create_inferior; | |
1969 | record_ops.to_store_registers = record_store_registers; | |
1970 | record_ops.to_xfer_partial = record_xfer_partial; | |
1971 | record_ops.to_insert_breakpoint = record_insert_breakpoint; | |
1972 | record_ops.to_remove_breakpoint = record_remove_breakpoint; | |
9093389c | 1973 | record_ops.to_stopped_by_watchpoint = record_stopped_by_watchpoint; |
58ed7dcd | 1974 | record_ops.to_stopped_data_address = record_stopped_data_address; |
69d05d38 HZ |
1975 | record_ops.to_can_execute_reverse = record_can_execute_reverse; |
1976 | record_ops.to_stratum = record_stratum; | |
6b04bdb7 MS |
1977 | /* Add bookmark target methods. */ |
1978 | record_ops.to_get_bookmark = record_get_bookmark; | |
1979 | record_ops.to_goto_bookmark = record_goto_bookmark; | |
32231432 PA |
1980 | record_ops.to_async = record_async; |
1981 | record_ops.to_can_async_p = record_can_async_p; | |
1982 | record_ops.to_is_async_p = record_is_async_p; | |
32231432 | 1983 | record_ops.to_execution_direction = record_execution_direction; |
69d05d38 HZ |
1984 | record_ops.to_magic = OPS_MAGIC; |
1985 | } | |
1986 | ||
27699eea MS |
1987 | /* "to_resume" method for prec over corefile. */ |
1988 | ||
1989 | static void | |
1990 | record_core_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1991 | enum gdb_signal signal) |
27699eea MS |
1992 | { |
1993 | record_resume_step = step; | |
32231432 PA |
1994 | record_resumed = 1; |
1995 | record_execution_dir = execution_direction; | |
1996 | ||
1997 | /* We are about to start executing the inferior (or simulate it), | |
1998 | let's register it with the event loop. */ | |
1999 | if (target_can_async_p ()) | |
2000 | { | |
2001 | target_async (inferior_event_handler, 0); | |
2002 | ||
2003 | /* Notify the event loop there's an event to wait for. */ | |
2004 | mark_async_event_handler (record_async_inferior_event_token); | |
2005 | } | |
27699eea MS |
2006 | } |
2007 | ||
2008 | /* "to_kill" method for prec over corefile. */ | |
2009 | ||
2010 | static void | |
2011 | record_core_kill (struct target_ops *ops) | |
2012 | { | |
2013 | if (record_debug) | |
2014 | fprintf_unfiltered (gdb_stdlog, "Process record: record_core_kill\n"); | |
2015 | ||
2016 | unpush_target (&record_core_ops); | |
2017 | } | |
2018 | ||
2019 | /* "to_fetch_registers" method for prec over corefile. */ | |
2020 | ||
2021 | static void | |
2022 | record_core_fetch_registers (struct target_ops *ops, | |
2023 | struct regcache *regcache, | |
2024 | int regno) | |
2025 | { | |
2026 | if (regno < 0) | |
2027 | { | |
2028 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
2029 | int i; | |
2030 | ||
2031 | for (i = 0; i < num; i ++) | |
2032 | regcache_raw_supply (regcache, i, | |
2033 | record_core_regbuf + MAX_REGISTER_SIZE * i); | |
2034 | } | |
2035 | else | |
2036 | regcache_raw_supply (regcache, regno, | |
2037 | record_core_regbuf + MAX_REGISTER_SIZE * regno); | |
2038 | } | |
2039 | ||
2040 | /* "to_prepare_to_store" method for prec over corefile. */ | |
2041 | ||
2042 | static void | |
2043 | record_core_prepare_to_store (struct regcache *regcache) | |
2044 | { | |
2045 | } | |
2046 | ||
2047 | /* "to_store_registers" method for prec over corefile. */ | |
2048 | ||
2049 | static void | |
2050 | record_core_store_registers (struct target_ops *ops, | |
2051 | struct regcache *regcache, | |
2052 | int regno) | |
2053 | { | |
2054 | if (record_gdb_operation_disable) | |
2055 | regcache_raw_collect (regcache, regno, | |
2056 | record_core_regbuf + MAX_REGISTER_SIZE * regno); | |
2057 | else | |
2058 | error (_("You can't do that without a process to debug.")); | |
2059 | } | |
2060 | ||
2061 | /* "to_xfer_partial" method for prec over corefile. */ | |
2062 | ||
2063 | static LONGEST | |
2064 | record_core_xfer_partial (struct target_ops *ops, enum target_object object, | |
2065 | const char *annex, gdb_byte *readbuf, | |
2066 | const gdb_byte *writebuf, ULONGEST offset, | |
2067 | LONGEST len) | |
2068 | { | |
123f5f96 MS |
2069 | if (object == TARGET_OBJECT_MEMORY) |
2070 | { | |
2071 | if (record_gdb_operation_disable || !writebuf) | |
2072 | { | |
2073 | struct target_section *p; | |
2074 | ||
2075 | for (p = record_core_start; p < record_core_end; p++) | |
2076 | { | |
2077 | if (offset >= p->addr) | |
2078 | { | |
2079 | struct record_core_buf_entry *entry; | |
2080 | ULONGEST sec_offset; | |
2081 | ||
2082 | if (offset >= p->endaddr) | |
2083 | continue; | |
2084 | ||
2085 | if (offset + len > p->endaddr) | |
2086 | len = p->endaddr - offset; | |
2087 | ||
2088 | sec_offset = offset - p->addr; | |
2089 | ||
2090 | /* Read readbuf or write writebuf p, offset, len. */ | |
2091 | /* Check flags. */ | |
2092 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2093 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2094 | { | |
2095 | if (readbuf) | |
2096 | memset (readbuf, 0, len); | |
2097 | return len; | |
2098 | } | |
2099 | /* Get record_core_buf_entry. */ | |
2100 | for (entry = record_core_buf_list; entry; | |
2101 | entry = entry->prev) | |
2102 | if (entry->p == p) | |
2103 | break; | |
2104 | if (writebuf) | |
2105 | { | |
2106 | if (!entry) | |
2107 | { | |
2108 | /* Add a new entry. */ | |
2109 | entry = (struct record_core_buf_entry *) | |
2110 | xmalloc (sizeof (struct record_core_buf_entry)); | |
2111 | entry->p = p; | |
2112 | if (!bfd_malloc_and_get_section (p->bfd, | |
2113 | p->the_bfd_section, | |
2114 | &entry->buf)) | |
2115 | { | |
2116 | xfree (entry); | |
2117 | return 0; | |
2118 | } | |
2119 | entry->prev = record_core_buf_list; | |
2120 | record_core_buf_list = entry; | |
2121 | } | |
2122 | ||
2123 | memcpy (entry->buf + sec_offset, writebuf, | |
2124 | (size_t) len); | |
2125 | } | |
2126 | else | |
2127 | { | |
2128 | if (!entry) | |
2129 | return record_beneath_to_xfer_partial | |
2130 | (record_beneath_to_xfer_partial_ops, | |
2131 | object, annex, readbuf, writebuf, | |
2132 | offset, len); | |
2133 | ||
2134 | memcpy (readbuf, entry->buf + sec_offset, | |
2135 | (size_t) len); | |
2136 | } | |
2137 | ||
2138 | return len; | |
2139 | } | |
2140 | } | |
2141 | ||
2142 | return -1; | |
2143 | } | |
2144 | else | |
2145 | error (_("You can't do that without a process to debug.")); | |
2146 | } | |
27699eea MS |
2147 | |
2148 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
2149 | object, annex, readbuf, writebuf, | |
2150 | offset, len); | |
2151 | } | |
2152 | ||
2153 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2154 | ||
2155 | static int | |
2156 | record_core_insert_breakpoint (struct gdbarch *gdbarch, | |
2157 | struct bp_target_info *bp_tgt) | |
2158 | { | |
2159 | return 0; | |
2160 | } | |
2161 | ||
2162 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2163 | ||
2164 | static int | |
2165 | record_core_remove_breakpoint (struct gdbarch *gdbarch, | |
2166 | struct bp_target_info *bp_tgt) | |
2167 | { | |
2168 | return 0; | |
2169 | } | |
2170 | ||
2171 | /* "to_has_execution" method for prec over corefile. */ | |
2172 | ||
aeaec162 TT |
2173 | static int |
2174 | record_core_has_execution (struct target_ops *ops, ptid_t the_ptid) | |
27699eea MS |
2175 | { |
2176 | return 1; | |
2177 | } | |
2178 | ||
2179 | static void | |
2180 | init_record_core_ops (void) | |
2181 | { | |
06280d23 | 2182 | record_core_ops.to_shortname = "record-core"; |
27699eea MS |
2183 | record_core_ops.to_longname = "Process record and replay target"; |
2184 | record_core_ops.to_doc = | |
2185 | "Log program while executing and replay execution from log."; | |
2186 | record_core_ops.to_open = record_open; | |
2187 | record_core_ops.to_close = record_close; | |
2188 | record_core_ops.to_resume = record_core_resume; | |
2189 | record_core_ops.to_wait = record_wait; | |
2190 | record_core_ops.to_kill = record_core_kill; | |
2191 | record_core_ops.to_fetch_registers = record_core_fetch_registers; | |
2192 | record_core_ops.to_prepare_to_store = record_core_prepare_to_store; | |
2193 | record_core_ops.to_store_registers = record_core_store_registers; | |
2194 | record_core_ops.to_xfer_partial = record_core_xfer_partial; | |
2195 | record_core_ops.to_insert_breakpoint = record_core_insert_breakpoint; | |
2196 | record_core_ops.to_remove_breakpoint = record_core_remove_breakpoint; | |
9093389c | 2197 | record_core_ops.to_stopped_by_watchpoint = record_stopped_by_watchpoint; |
58ed7dcd | 2198 | record_core_ops.to_stopped_data_address = record_stopped_data_address; |
27699eea MS |
2199 | record_core_ops.to_can_execute_reverse = record_can_execute_reverse; |
2200 | record_core_ops.to_has_execution = record_core_has_execution; | |
2201 | record_core_ops.to_stratum = record_stratum; | |
6b04bdb7 MS |
2202 | /* Add bookmark target methods. */ |
2203 | record_core_ops.to_get_bookmark = record_get_bookmark; | |
2204 | record_core_ops.to_goto_bookmark = record_goto_bookmark; | |
32231432 PA |
2205 | record_core_ops.to_async = record_async; |
2206 | record_core_ops.to_can_async_p = record_can_async_p; | |
2207 | record_core_ops.to_is_async_p = record_is_async_p; | |
32231432 | 2208 | record_core_ops.to_execution_direction = record_execution_direction; |
27699eea MS |
2209 | record_core_ops.to_magic = OPS_MAGIC; |
2210 | } | |
2211 | ||
6df67667 MS |
2212 | /* Implement "show record debug" command. */ |
2213 | ||
69d05d38 HZ |
2214 | static void |
2215 | show_record_debug (struct ui_file *file, int from_tty, | |
2216 | struct cmd_list_element *c, const char *value) | |
2217 | { | |
2218 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), | |
2219 | value); | |
2220 | } | |
2221 | ||
2222 | /* Alias for "target record". */ | |
2223 | ||
2224 | static void | |
2225 | cmd_record_start (char *args, int from_tty) | |
2226 | { | |
2227 | execute_command ("target record", from_tty); | |
2228 | } | |
2229 | ||
2230 | /* Truncate the record log from the present point | |
2231 | of replay until the end. */ | |
2232 | ||
2233 | static void | |
2234 | cmd_record_delete (char *args, int from_tty) | |
2235 | { | |
2236 | if (current_target.to_stratum == record_stratum) | |
2237 | { | |
2238 | if (RECORD_IS_REPLAY) | |
2239 | { | |
2240 | if (!from_tty || query (_("Delete the log from this point forward " | |
2241 | "and begin to record the running message " | |
2242 | "at current PC?"))) | |
61f75dd8 | 2243 | record_list_release_following (record_list); |
69d05d38 HZ |
2244 | } |
2245 | else | |
2246 | printf_unfiltered (_("Already at end of record list.\n")); | |
2247 | ||
2248 | } | |
2249 | else | |
2250 | printf_unfiltered (_("Process record is not started.\n")); | |
2251 | } | |
2252 | ||
6df67667 | 2253 | /* Implement the "stoprecord" or "record stop" command. */ |
69d05d38 HZ |
2254 | |
2255 | static void | |
2256 | cmd_record_stop (char *args, int from_tty) | |
2257 | { | |
2258 | if (current_target.to_stratum == record_stratum) | |
2259 | { | |
5d40bb85 | 2260 | unpush_target (&record_ops); |
b54295a7 MS |
2261 | printf_unfiltered (_("Process record is stopped and all execution " |
2262 | "logs are deleted.\n")); | |
69d05d38 HZ |
2263 | } |
2264 | else | |
2265 | printf_unfiltered (_("Process record is not started.\n")); | |
2266 | } | |
2267 | ||
2268 | /* Set upper limit of record log size. */ | |
2269 | ||
2270 | static void | |
2271 | set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c) | |
2272 | { | |
2273 | if (record_insn_num > record_insn_max_num && record_insn_max_num) | |
2274 | { | |
265aad34 | 2275 | /* Count down record_insn_num while releasing records from list. */ |
69d05d38 | 2276 | while (record_insn_num > record_insn_max_num) |
265aad34 MS |
2277 | { |
2278 | record_list_release_first (); | |
2279 | record_insn_num--; | |
2280 | } | |
69d05d38 HZ |
2281 | } |
2282 | } | |
2283 | ||
69d05d38 HZ |
2284 | static struct cmd_list_element *record_cmdlist, *set_record_cmdlist, |
2285 | *show_record_cmdlist, *info_record_cmdlist; | |
2286 | ||
2287 | static void | |
2288 | set_record_command (char *args, int from_tty) | |
2289 | { | |
3e43a32a MS |
2290 | printf_unfiltered (_("\"set record\" must be followed " |
2291 | "by an apporpriate subcommand.\n")); | |
69d05d38 HZ |
2292 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); |
2293 | } | |
2294 | ||
2295 | static void | |
2296 | show_record_command (char *args, int from_tty) | |
2297 | { | |
2298 | cmd_show_list (show_record_cmdlist, from_tty, ""); | |
2299 | } | |
2300 | ||
b54295a7 MS |
2301 | /* Display some statistics about the execution log. */ |
2302 | ||
69d05d38 HZ |
2303 | static void |
2304 | info_record_command (char *args, int from_tty) | |
2305 | { | |
b54295a7 MS |
2306 | struct record_entry *p; |
2307 | ||
2308 | if (current_target.to_stratum == record_stratum) | |
2309 | { | |
2310 | if (RECORD_IS_REPLAY) | |
2311 | printf_filtered (_("Replay mode:\n")); | |
2312 | else | |
2313 | printf_filtered (_("Record mode:\n")); | |
2314 | ||
2315 | /* Find entry for first actual instruction in the log. */ | |
2316 | for (p = record_first.next; | |
2317 | p != NULL && p->type != record_end; | |
2318 | p = p->next) | |
2319 | ; | |
2320 | ||
2321 | /* Do we have a log at all? */ | |
2322 | if (p != NULL && p->type == record_end) | |
2323 | { | |
2324 | /* Display instruction number for first instruction in the log. */ | |
2325 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
2326 | pulongest (p->u.end.insn_num)); | |
2327 | ||
2328 | /* If in replay mode, display where we are in the log. */ | |
2329 | if (RECORD_IS_REPLAY) | |
2330 | printf_filtered (_("Current instruction number is %s.\n"), | |
2331 | pulongest (record_list->u.end.insn_num)); | |
2332 | ||
2333 | /* Display instruction number for last instruction in the log. */ | |
2334 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
2335 | pulongest (record_insn_count)); | |
2336 | ||
2337 | /* Display log count. */ | |
2338 | printf_filtered (_("Log contains %d instructions.\n"), | |
2339 | record_insn_num); | |
2340 | } | |
2341 | else | |
2342 | { | |
2343 | printf_filtered (_("No instructions have been logged.\n")); | |
2344 | } | |
2345 | } | |
2346 | else | |
2347 | { | |
2348 | printf_filtered (_("target record is not active.\n")); | |
2349 | } | |
2350 | ||
2351 | /* Display max log size. */ | |
2352 | printf_filtered (_("Max logged instructions is %d.\n"), | |
2353 | record_insn_max_num); | |
69d05d38 HZ |
2354 | } |
2355 | ||
0156b218 MS |
2356 | /* Record log save-file format |
2357 | Version 1 (never released) | |
2358 | ||
2359 | Header: | |
2360 | 4 bytes: magic number htonl(0x20090829). | |
2361 | NOTE: be sure to change whenever this file format changes! | |
2362 | ||
2363 | Records: | |
2364 | record_end: | |
2365 | 1 byte: record type (record_end, see enum record_type). | |
2366 | record_reg: | |
2367 | 1 byte: record type (record_reg, see enum record_type). | |
2368 | 8 bytes: register id (network byte order). | |
2369 | MAX_REGISTER_SIZE bytes: register value. | |
2370 | record_mem: | |
2371 | 1 byte: record type (record_mem, see enum record_type). | |
2372 | 8 bytes: memory length (network byte order). | |
2373 | 8 bytes: memory address (network byte order). | |
2374 | n bytes: memory value (n == memory length). | |
2375 | ||
2376 | Version 2 | |
2377 | 4 bytes: magic number netorder32(0x20091016). | |
2378 | NOTE: be sure to change whenever this file format changes! | |
2379 | ||
2380 | Records: | |
2381 | record_end: | |
2382 | 1 byte: record type (record_end, see enum record_type). | |
2383 | 4 bytes: signal | |
2384 | 4 bytes: instruction count | |
2385 | record_reg: | |
2386 | 1 byte: record type (record_reg, see enum record_type). | |
2387 | 4 bytes: register id (network byte order). | |
2388 | n bytes: register value (n == actual register size). | |
2389 | (eg. 4 bytes for x86 general registers). | |
2390 | record_mem: | |
2391 | 1 byte: record type (record_mem, see enum record_type). | |
2392 | 4 bytes: memory length (network byte order). | |
2393 | 8 bytes: memory address (network byte order). | |
2394 | n bytes: memory value (n == memory length). | |
2395 | ||
2396 | */ | |
2397 | ||
2398 | /* bfdcore_read -- read bytes from a core file section. */ | |
2399 | ||
2400 | static inline void | |
2401 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2402 | { | |
2403 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2404 | ||
2405 | if (ret) | |
2406 | *offset += len; | |
2407 | else | |
4f1cdeec | 2408 | error (_("Failed to read %d bytes from core file %s ('%s')."), |
0156b218 MS |
2409 | len, bfd_get_filename (obfd), |
2410 | bfd_errmsg (bfd_get_error ())); | |
2411 | } | |
2412 | ||
2413 | static inline uint64_t | |
6aa96d03 | 2414 | netorder64 (uint64_t input) |
0156b218 | 2415 | { |
6aa96d03 MS |
2416 | uint64_t ret; |
2417 | ||
2418 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2419 | BFD_ENDIAN_BIG, input); | |
2420 | return ret; | |
0156b218 MS |
2421 | } |
2422 | ||
2423 | static inline uint32_t | |
6aa96d03 | 2424 | netorder32 (uint32_t input) |
0156b218 | 2425 | { |
6aa96d03 MS |
2426 | uint32_t ret; |
2427 | ||
2428 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2429 | BFD_ENDIAN_BIG, input); | |
2430 | return ret; | |
0156b218 MS |
2431 | } |
2432 | ||
2433 | static inline uint16_t | |
6aa96d03 | 2434 | netorder16 (uint16_t input) |
0156b218 | 2435 | { |
6aa96d03 MS |
2436 | uint16_t ret; |
2437 | ||
2438 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2439 | BFD_ENDIAN_BIG, input); | |
2440 | return ret; | |
0156b218 MS |
2441 | } |
2442 | ||
2443 | /* Restore the execution log from a core_bfd file. */ | |
2444 | static void | |
2445 | record_restore (void) | |
2446 | { | |
2447 | uint32_t magic; | |
2448 | struct cleanup *old_cleanups; | |
2449 | struct record_entry *rec; | |
2450 | asection *osec; | |
2451 | uint32_t osec_size; | |
2452 | int bfd_offset = 0; | |
2453 | struct regcache *regcache; | |
2454 | ||
2455 | /* We restore the execution log from the open core bfd, | |
2456 | if there is one. */ | |
2457 | if (core_bfd == NULL) | |
2458 | return; | |
2459 | ||
2460 | /* "record_restore" can only be called when record list is empty. */ | |
2461 | gdb_assert (record_first.next == NULL); | |
2462 | ||
2463 | if (record_debug) | |
07b7cff3 | 2464 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); |
0156b218 MS |
2465 | |
2466 | /* Now need to find our special note section. */ | |
2467 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
0156b218 | 2468 | if (record_debug) |
07b7cff3 PA |
2469 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", |
2470 | osec ? "succeeded" : "failed"); | |
d42de051 MS |
2471 | if (osec == NULL) |
2472 | return; | |
2473 | osec_size = bfd_section_size (core_bfd, osec); | |
0156b218 | 2474 | if (record_debug) |
07b7cff3 | 2475 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); |
0156b218 MS |
2476 | |
2477 | /* Check the magic code. */ | |
2478 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
2479 | if (magic != RECORD_FILE_MAGIC) | |
2480 | error (_("Version mis-match or file format error in core file %s."), | |
2481 | bfd_get_filename (core_bfd)); | |
2482 | if (record_debug) | |
3e43a32a MS |
2483 | fprintf_unfiltered (gdb_stdlog, |
2484 | " Reading 4-byte magic cookie " | |
2485 | "RECORD_FILE_MAGIC (0x%s)\n", | |
07b7cff3 | 2486 | phex_nz (netorder32 (magic), 4)); |
0156b218 MS |
2487 | |
2488 | /* Restore the entries in recfd into record_arch_list_head and | |
2489 | record_arch_list_tail. */ | |
2490 | record_arch_list_head = NULL; | |
2491 | record_arch_list_tail = NULL; | |
2492 | record_insn_num = 0; | |
2493 | old_cleanups = make_cleanup (record_arch_list_cleanups, 0); | |
2494 | regcache = get_current_regcache (); | |
2495 | ||
2496 | while (1) | |
2497 | { | |
ec6dbf37 | 2498 | uint8_t rectype; |
0156b218 MS |
2499 | uint32_t regnum, len, signal, count; |
2500 | uint64_t addr; | |
2501 | ||
2502 | /* We are finished when offset reaches osec_size. */ | |
2503 | if (bfd_offset >= osec_size) | |
2504 | break; | |
ec6dbf37 | 2505 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); |
0156b218 | 2506 | |
ec6dbf37 | 2507 | switch (rectype) |
0156b218 MS |
2508 | { |
2509 | case record_reg: /* reg */ | |
2510 | /* Get register number to regnum. */ | |
2511 | bfdcore_read (core_bfd, osec, ®num, | |
2512 | sizeof (regnum), &bfd_offset); | |
2513 | regnum = netorder32 (regnum); | |
2514 | ||
2515 | rec = record_reg_alloc (regcache, regnum); | |
2516 | ||
2517 | /* Get val. */ | |
2518 | bfdcore_read (core_bfd, osec, record_get_loc (rec), | |
2519 | rec->u.reg.len, &bfd_offset); | |
2520 | ||
07b7cff3 | 2521 | if (record_debug) |
3e43a32a MS |
2522 | fprintf_unfiltered (gdb_stdlog, |
2523 | " Reading register %d (1 " | |
2524 | "plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2525 | rec->u.reg.num, |
2526 | (unsigned long) sizeof (regnum), | |
2527 | rec->u.reg.len); | |
0156b218 MS |
2528 | break; |
2529 | ||
2530 | case record_mem: /* mem */ | |
2531 | /* Get len. */ | |
2532 | bfdcore_read (core_bfd, osec, &len, | |
2533 | sizeof (len), &bfd_offset); | |
2534 | len = netorder32 (len); | |
2535 | ||
2536 | /* Get addr. */ | |
2537 | bfdcore_read (core_bfd, osec, &addr, | |
2538 | sizeof (addr), &bfd_offset); | |
2539 | addr = netorder64 (addr); | |
2540 | ||
2541 | rec = record_mem_alloc (addr, len); | |
2542 | ||
2543 | /* Get val. */ | |
2544 | bfdcore_read (core_bfd, osec, record_get_loc (rec), | |
2545 | rec->u.mem.len, &bfd_offset); | |
2546 | ||
07b7cff3 | 2547 | if (record_debug) |
3e43a32a MS |
2548 | fprintf_unfiltered (gdb_stdlog, |
2549 | " Reading memory %s (1 plus " | |
2550 | "%lu plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2551 | paddress (get_current_arch (), |
2552 | rec->u.mem.addr), | |
2553 | (unsigned long) sizeof (addr), | |
2554 | (unsigned long) sizeof (len), | |
2555 | rec->u.mem.len); | |
0156b218 MS |
2556 | break; |
2557 | ||
2558 | case record_end: /* end */ | |
2559 | rec = record_end_alloc (); | |
2560 | record_insn_num ++; | |
2561 | ||
2562 | /* Get signal value. */ | |
2563 | bfdcore_read (core_bfd, osec, &signal, | |
2564 | sizeof (signal), &bfd_offset); | |
2565 | signal = netorder32 (signal); | |
2566 | rec->u.end.sigval = signal; | |
2567 | ||
2568 | /* Get insn count. */ | |
2569 | bfdcore_read (core_bfd, osec, &count, | |
2570 | sizeof (count), &bfd_offset); | |
2571 | count = netorder32 (count); | |
2572 | rec->u.end.insn_num = count; | |
2573 | record_insn_count = count + 1; | |
07b7cff3 | 2574 | if (record_debug) |
3e43a32a MS |
2575 | fprintf_unfiltered (gdb_stdlog, |
2576 | " Reading record_end (1 + " | |
2577 | "%lu + %lu bytes), offset == %s\n", | |
07b7cff3 PA |
2578 | (unsigned long) sizeof (signal), |
2579 | (unsigned long) sizeof (count), | |
2580 | paddress (get_current_arch (), | |
2581 | bfd_offset)); | |
0156b218 MS |
2582 | break; |
2583 | ||
2584 | default: | |
2585 | error (_("Bad entry type in core file %s."), | |
2586 | bfd_get_filename (core_bfd)); | |
2587 | break; | |
2588 | } | |
2589 | ||
2590 | /* Add rec to record arch list. */ | |
2591 | record_arch_list_add (rec); | |
2592 | } | |
2593 | ||
2594 | discard_cleanups (old_cleanups); | |
2595 | ||
2596 | /* Add record_arch_list_head to the end of record list. */ | |
2597 | record_first.next = record_arch_list_head; | |
2598 | record_arch_list_head->prev = &record_first; | |
2599 | record_arch_list_tail->next = NULL; | |
2600 | record_list = &record_first; | |
2601 | ||
2602 | /* Update record_insn_max_num. */ | |
2603 | if (record_insn_num > record_insn_max_num) | |
2604 | { | |
2605 | record_insn_max_num = record_insn_num; | |
2606 | warning (_("Auto increase record/replay buffer limit to %d."), | |
2607 | record_insn_max_num); | |
2608 | } | |
2609 | ||
2610 | /* Succeeded. */ | |
2611 | printf_filtered (_("Restored records from core file %s.\n"), | |
2612 | bfd_get_filename (core_bfd)); | |
2613 | ||
2614 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
2615 | } | |
2616 | ||
2617 | /* bfdcore_write -- write bytes into a core file section. */ | |
2618 | ||
2619 | static inline void | |
2620 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2621 | { | |
2622 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2623 | ||
2624 | if (ret) | |
2625 | *offset += len; | |
2626 | else | |
b37520b6 | 2627 | error (_("Failed to write %d bytes to core file %s ('%s')."), |
0156b218 MS |
2628 | len, bfd_get_filename (obfd), |
2629 | bfd_errmsg (bfd_get_error ())); | |
2630 | } | |
2631 | ||
2632 | /* Restore the execution log from a file. We use a modified elf | |
2633 | corefile format, with an extra section for our data. */ | |
2634 | ||
2635 | static void | |
2636 | cmd_record_restore (char *args, int from_tty) | |
2637 | { | |
2638 | core_file_command (args, from_tty); | |
2639 | record_open (args, from_tty); | |
2640 | } | |
2641 | ||
2642 | static void | |
2643 | record_save_cleanups (void *data) | |
2644 | { | |
2645 | bfd *obfd = data; | |
2646 | char *pathname = xstrdup (bfd_get_filename (obfd)); | |
123f5f96 | 2647 | |
cbb099e8 | 2648 | gdb_bfd_unref (obfd); |
0156b218 MS |
2649 | unlink (pathname); |
2650 | xfree (pathname); | |
2651 | } | |
2652 | ||
2653 | /* Save the execution log to a file. We use a modified elf corefile | |
2654 | format, with an extra section for our data. */ | |
2655 | ||
2656 | static void | |
2657 | cmd_record_save (char *args, int from_tty) | |
2658 | { | |
2659 | char *recfilename, recfilename_buffer[40]; | |
0156b218 MS |
2660 | struct record_entry *cur_record_list; |
2661 | uint32_t magic; | |
2662 | struct regcache *regcache; | |
2663 | struct gdbarch *gdbarch; | |
2664 | struct cleanup *old_cleanups; | |
2665 | struct cleanup *set_cleanups; | |
2666 | bfd *obfd; | |
2667 | int save_size = 0; | |
2668 | asection *osec = NULL; | |
2669 | int bfd_offset = 0; | |
2670 | ||
2671 | if (strcmp (current_target.to_shortname, "record") != 0) | |
2672 | error (_("This command can only be used with target 'record'.\n" | |
2673 | "Use 'target record' first.\n")); | |
2674 | ||
2675 | if (args && *args) | |
2676 | recfilename = args; | |
2677 | else | |
2678 | { | |
2679 | /* Default recfile name is "gdb_record.PID". */ | |
2680 | snprintf (recfilename_buffer, sizeof (recfilename_buffer), | |
2681 | "gdb_record.%d", PIDGET (inferior_ptid)); | |
2682 | recfilename = recfilename_buffer; | |
2683 | } | |
2684 | ||
2685 | /* Open the save file. */ | |
2686 | if (record_debug) | |
07b7cff3 PA |
2687 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", |
2688 | recfilename); | |
0156b218 MS |
2689 | |
2690 | /* Open the output file. */ | |
2691 | obfd = create_gcore_bfd (recfilename); | |
2692 | old_cleanups = make_cleanup (record_save_cleanups, obfd); | |
2693 | ||
2694 | /* Save the current record entry to "cur_record_list". */ | |
2695 | cur_record_list = record_list; | |
2696 | ||
2697 | /* Get the values of regcache and gdbarch. */ | |
2698 | regcache = get_current_regcache (); | |
2699 | gdbarch = get_regcache_arch (regcache); | |
2700 | ||
2701 | /* Disable the GDB operation record. */ | |
2702 | set_cleanups = record_gdb_operation_disable_set (); | |
2703 | ||
2704 | /* Reverse execute to the begin of record list. */ | |
2705 | while (1) | |
2706 | { | |
2707 | /* Check for beginning and end of log. */ | |
2708 | if (record_list == &record_first) | |
2709 | break; | |
2710 | ||
2711 | record_exec_insn (regcache, gdbarch, record_list); | |
2712 | ||
2713 | if (record_list->prev) | |
2714 | record_list = record_list->prev; | |
2715 | } | |
2716 | ||
2717 | /* Compute the size needed for the extra bfd section. */ | |
2718 | save_size = 4; /* magic cookie */ | |
2719 | for (record_list = record_first.next; record_list; | |
2720 | record_list = record_list->next) | |
2721 | switch (record_list->type) | |
2722 | { | |
2723 | case record_end: | |
2724 | save_size += 1 + 4 + 4; | |
2725 | break; | |
2726 | case record_reg: | |
2727 | save_size += 1 + 4 + record_list->u.reg.len; | |
2728 | break; | |
2729 | case record_mem: | |
2730 | save_size += 1 + 4 + 8 + record_list->u.mem.len; | |
2731 | break; | |
2732 | } | |
2733 | ||
2734 | /* Make the new bfd section. */ | |
2735 | osec = bfd_make_section_anyway_with_flags (obfd, "precord", | |
2736 | SEC_HAS_CONTENTS | |
2737 | | SEC_READONLY); | |
2738 | if (osec == NULL) | |
2739 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2740 | recfilename, | |
2741 | bfd_errmsg (bfd_get_error ())); | |
2742 | bfd_set_section_size (obfd, osec, save_size); | |
2743 | bfd_set_section_vma (obfd, osec, 0); | |
2744 | bfd_set_section_alignment (obfd, osec, 0); | |
2745 | bfd_section_lma (obfd, osec) = 0; | |
2746 | ||
2747 | /* Save corefile state. */ | |
2748 | write_gcore_file (obfd); | |
2749 | ||
2750 | /* Write out the record log. */ | |
2751 | /* Write the magic code. */ | |
2752 | magic = RECORD_FILE_MAGIC; | |
2753 | if (record_debug) | |
3e43a32a MS |
2754 | fprintf_unfiltered (gdb_stdlog, |
2755 | " Writing 4-byte magic cookie " | |
2756 | "RECORD_FILE_MAGIC (0x%s)\n", | |
07b7cff3 | 2757 | phex_nz (magic, 4)); |
0156b218 MS |
2758 | bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset); |
2759 | ||
2760 | /* Save the entries to recfd and forward execute to the end of | |
2761 | record list. */ | |
2762 | record_list = &record_first; | |
2763 | while (1) | |
2764 | { | |
2765 | /* Save entry. */ | |
2766 | if (record_list != &record_first) | |
2767 | { | |
2768 | uint8_t type; | |
2769 | uint32_t regnum, len, signal, count; | |
2770 | uint64_t addr; | |
2771 | ||
2772 | type = record_list->type; | |
2773 | bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset); | |
2774 | ||
2775 | switch (record_list->type) | |
2776 | { | |
2777 | case record_reg: /* reg */ | |
07b7cff3 | 2778 | if (record_debug) |
3e43a32a MS |
2779 | fprintf_unfiltered (gdb_stdlog, |
2780 | " Writing register %d (1 " | |
2781 | "plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2782 | record_list->u.reg.num, |
2783 | (unsigned long) sizeof (regnum), | |
2784 | record_list->u.reg.len); | |
0156b218 MS |
2785 | |
2786 | /* Write regnum. */ | |
2787 | regnum = netorder32 (record_list->u.reg.num); | |
2788 | bfdcore_write (obfd, osec, ®num, | |
2789 | sizeof (regnum), &bfd_offset); | |
2790 | ||
2791 | /* Write regval. */ | |
2792 | bfdcore_write (obfd, osec, record_get_loc (record_list), | |
2793 | record_list->u.reg.len, &bfd_offset); | |
2794 | break; | |
2795 | ||
2796 | case record_mem: /* mem */ | |
2797 | if (record_debug) | |
3e43a32a MS |
2798 | fprintf_unfiltered (gdb_stdlog, |
2799 | " Writing memory %s (1 plus " | |
2800 | "%lu plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2801 | paddress (gdbarch, |
2802 | record_list->u.mem.addr), | |
2803 | (unsigned long) sizeof (addr), | |
2804 | (unsigned long) sizeof (len), | |
2805 | record_list->u.mem.len); | |
0156b218 MS |
2806 | |
2807 | /* Write memlen. */ | |
2808 | len = netorder32 (record_list->u.mem.len); | |
2809 | bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset); | |
2810 | ||
2811 | /* Write memaddr. */ | |
2812 | addr = netorder64 (record_list->u.mem.addr); | |
2813 | bfdcore_write (obfd, osec, &addr, | |
2814 | sizeof (addr), &bfd_offset); | |
2815 | ||
2816 | /* Write memval. */ | |
2817 | bfdcore_write (obfd, osec, record_get_loc (record_list), | |
2818 | record_list->u.mem.len, &bfd_offset); | |
2819 | break; | |
2820 | ||
2821 | case record_end: | |
07b7cff3 | 2822 | if (record_debug) |
3e43a32a MS |
2823 | fprintf_unfiltered (gdb_stdlog, |
2824 | " Writing record_end (1 + " | |
2825 | "%lu + %lu bytes)\n", | |
07b7cff3 PA |
2826 | (unsigned long) sizeof (signal), |
2827 | (unsigned long) sizeof (count)); | |
0156b218 MS |
2828 | /* Write signal value. */ |
2829 | signal = netorder32 (record_list->u.end.sigval); | |
2830 | bfdcore_write (obfd, osec, &signal, | |
2831 | sizeof (signal), &bfd_offset); | |
2832 | ||
2833 | /* Write insn count. */ | |
2834 | count = netorder32 (record_list->u.end.insn_num); | |
2835 | bfdcore_write (obfd, osec, &count, | |
2836 | sizeof (count), &bfd_offset); | |
2837 | break; | |
2838 | } | |
2839 | } | |
2840 | ||
2841 | /* Execute entry. */ | |
2842 | record_exec_insn (regcache, gdbarch, record_list); | |
2843 | ||
2844 | if (record_list->next) | |
2845 | record_list = record_list->next; | |
2846 | else | |
2847 | break; | |
2848 | } | |
2849 | ||
2850 | /* Reverse execute to cur_record_list. */ | |
2851 | while (1) | |
2852 | { | |
2853 | /* Check for beginning and end of log. */ | |
2854 | if (record_list == cur_record_list) | |
2855 | break; | |
2856 | ||
2857 | record_exec_insn (regcache, gdbarch, record_list); | |
2858 | ||
2859 | if (record_list->prev) | |
2860 | record_list = record_list->prev; | |
2861 | } | |
2862 | ||
2863 | do_cleanups (set_cleanups); | |
cbb099e8 | 2864 | gdb_bfd_unref (obfd); |
0156b218 MS |
2865 | discard_cleanups (old_cleanups); |
2866 | ||
2867 | /* Succeeded. */ | |
2868 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2869 | recfilename); | |
2870 | } | |
2871 | ||
6b04bdb7 MS |
2872 | /* record_goto_insn -- rewind the record log (forward or backward, |
2873 | depending on DIR) to the given entry, changing the program state | |
2874 | correspondingly. */ | |
2875 | ||
2876 | static void | |
2877 | record_goto_insn (struct record_entry *entry, | |
2878 | enum exec_direction_kind dir) | |
2879 | { | |
2880 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
2881 | struct regcache *regcache = get_current_regcache (); | |
2882 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2883 | ||
2884 | /* Assume everything is valid: we will hit the entry, | |
2885 | and we will not hit the end of the recording. */ | |
2886 | ||
2887 | if (dir == EXEC_FORWARD) | |
2888 | record_list = record_list->next; | |
2889 | ||
2890 | do | |
2891 | { | |
2892 | record_exec_insn (regcache, gdbarch, record_list); | |
2893 | if (dir == EXEC_REVERSE) | |
2894 | record_list = record_list->prev; | |
2895 | else | |
2896 | record_list = record_list->next; | |
2897 | } while (record_list != entry); | |
2898 | do_cleanups (set_cleanups); | |
2899 | } | |
2900 | ||
2901 | /* "record goto" command. Argument is an instruction number, | |
2902 | as given by "info record". | |
2903 | ||
2904 | Rewinds the recording (forward or backward) to the given instruction. */ | |
2905 | ||
2906 | static void | |
2907 | cmd_record_goto (char *arg, int from_tty) | |
2908 | { | |
2909 | struct record_entry *p = NULL; | |
2910 | ULONGEST target_insn = 0; | |
2911 | ||
2912 | if (arg == NULL || *arg == '\0') | |
2913 | error (_("Command requires an argument (insn number to go to).")); | |
2914 | ||
2915 | if (strncmp (arg, "start", strlen ("start")) == 0 | |
2916 | || strncmp (arg, "begin", strlen ("begin")) == 0) | |
2917 | { | |
2918 | /* Special case. Find first insn. */ | |
2919 | for (p = &record_first; p != NULL; p = p->next) | |
2920 | if (p->type == record_end) | |
2921 | break; | |
2922 | if (p) | |
2923 | target_insn = p->u.end.insn_num; | |
2924 | } | |
2925 | else if (strncmp (arg, "end", strlen ("end")) == 0) | |
2926 | { | |
2927 | /* Special case. Find last insn. */ | |
2928 | for (p = record_list; p->next != NULL; p = p->next) | |
2929 | ; | |
2930 | for (; p!= NULL; p = p->prev) | |
2931 | if (p->type == record_end) | |
2932 | break; | |
2933 | if (p) | |
2934 | target_insn = p->u.end.insn_num; | |
2935 | } | |
2936 | else | |
2937 | { | |
2938 | /* General case. Find designated insn. */ | |
2939 | target_insn = parse_and_eval_long (arg); | |
2940 | ||
2941 | for (p = &record_first; p != NULL; p = p->next) | |
2942 | if (p->type == record_end && p->u.end.insn_num == target_insn) | |
2943 | break; | |
2944 | } | |
2945 | ||
2946 | if (p == NULL) | |
2947 | error (_("Target insn '%s' not found."), arg); | |
2948 | else if (p == record_list) | |
2949 | error (_("Already at insn '%s'."), arg); | |
2950 | else if (p->u.end.insn_num > record_list->u.end.insn_num) | |
2951 | { | |
2952 | printf_filtered (_("Go forward to insn number %s\n"), | |
2953 | pulongest (target_insn)); | |
2954 | record_goto_insn (p, EXEC_FORWARD); | |
2955 | } | |
2956 | else | |
2957 | { | |
2958 | printf_filtered (_("Go backward to insn number %s\n"), | |
2959 | pulongest (target_insn)); | |
2960 | record_goto_insn (p, EXEC_REVERSE); | |
2961 | } | |
2962 | registers_changed (); | |
2963 | reinit_frame_cache (); | |
2964 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
2965 | } | |
2966 | ||
70221824 PA |
2967 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
2968 | extern initialize_file_ftype _initialize_record; | |
2969 | ||
69d05d38 HZ |
2970 | void |
2971 | _initialize_record (void) | |
2972 | { | |
0156b218 MS |
2973 | struct cmd_list_element *c; |
2974 | ||
69d05d38 HZ |
2975 | /* Init record_first. */ |
2976 | record_first.prev = NULL; | |
2977 | record_first.next = NULL; | |
2978 | record_first.type = record_end; | |
2979 | ||
2980 | init_record_ops (); | |
2981 | add_target (&record_ops); | |
27699eea MS |
2982 | init_record_core_ops (); |
2983 | add_target (&record_core_ops); | |
69d05d38 HZ |
2984 | |
2985 | add_setshow_zinteger_cmd ("record", no_class, &record_debug, | |
2986 | _("Set debugging of record/replay feature."), | |
2987 | _("Show debugging of record/replay feature."), | |
2988 | _("When enabled, debugging output for " | |
2989 | "record/replay feature is displayed."), | |
2990 | NULL, show_record_debug, &setdebuglist, | |
2991 | &showdebuglist); | |
2992 | ||
0156b218 MS |
2993 | c = add_prefix_cmd ("record", class_obscure, cmd_record_start, |
2994 | _("Abbreviated form of \"target record\" command."), | |
2995 | &record_cmdlist, "record ", 0, &cmdlist); | |
2996 | set_cmd_completer (c, filename_completer); | |
2997 | ||
69d05d38 HZ |
2998 | add_com_alias ("rec", "record", class_obscure, 1); |
2999 | add_prefix_cmd ("record", class_support, set_record_command, | |
3000 | _("Set record options"), &set_record_cmdlist, | |
3001 | "set record ", 0, &setlist); | |
3002 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); | |
3003 | add_prefix_cmd ("record", class_support, show_record_command, | |
3004 | _("Show record options"), &show_record_cmdlist, | |
3005 | "show record ", 0, &showlist); | |
3006 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); | |
3007 | add_prefix_cmd ("record", class_support, info_record_command, | |
3008 | _("Info record options"), &info_record_cmdlist, | |
3009 | "info record ", 0, &infolist); | |
3010 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); | |
3011 | ||
0156b218 MS |
3012 | c = add_cmd ("save", class_obscure, cmd_record_save, |
3013 | _("Save the execution log to a file.\n\ | |
3014 | Argument is optional filename.\n\ | |
3015 | Default filename is 'gdb_record.<process_id>'."), | |
3016 | &record_cmdlist); | |
3017 | set_cmd_completer (c, filename_completer); | |
3018 | ||
3019 | c = add_cmd ("restore", class_obscure, cmd_record_restore, | |
3020 | _("Restore the execution log from a file.\n\ | |
3021 | Argument is filename. File must be created with 'record save'."), | |
3022 | &record_cmdlist); | |
3023 | set_cmd_completer (c, filename_completer); | |
69d05d38 HZ |
3024 | |
3025 | add_cmd ("delete", class_obscure, cmd_record_delete, | |
3026 | _("Delete the rest of execution log and start recording it anew."), | |
3027 | &record_cmdlist); | |
3028 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); | |
3029 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); | |
3030 | ||
3031 | add_cmd ("stop", class_obscure, cmd_record_stop, | |
3032 | _("Stop the record/replay target."), | |
3033 | &record_cmdlist); | |
3034 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); | |
3035 | ||
3036 | /* Record instructions number limit command. */ | |
3037 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
fda458ee | 3038 | &record_stop_at_limit, _("\ |
299a410e | 3039 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
3e43a32a MS |
3040 | Show whether record/replay stops when record/replay buffer becomes full."), |
3041 | _("Default is ON.\n\ | |
299a410e EZ |
3042 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ |
3043 | When OFF, if the record/replay buffer becomes full,\n\ | |
3044 | delete the oldest recorded instruction to make room for each new one."), | |
fda458ee MS |
3045 | NULL, NULL, |
3046 | &set_record_cmdlist, &show_record_cmdlist); | |
191e1813 | 3047 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
69d05d38 HZ |
3048 | &record_insn_max_num, |
3049 | _("Set record/replay buffer limit."), | |
299a410e EZ |
3050 | _("Show record/replay buffer limit."), _("\ |
3051 | Set the maximum number of instructions to be stored in the\n\ | |
3052 | record/replay buffer. Zero means unlimited. Default is 200000."), | |
69d05d38 HZ |
3053 | set_record_insn_max_num, |
3054 | NULL, &set_record_cmdlist, &show_record_cmdlist); | |
6b04bdb7 MS |
3055 | |
3056 | add_cmd ("goto", class_obscure, cmd_record_goto, _("\ | |
3057 | Restore the program to its state at instruction number N.\n\ | |
3058 | Argument is instruction number, as shown by 'info record'."), | |
3059 | &record_cmdlist); | |
bb08c432 HZ |
3060 | |
3061 | add_setshow_boolean_cmd ("memory-query", no_class, | |
3062 | &record_memory_query, _("\ | |
3063 | Set whether query if PREC cannot record memory change of next instruction."), | |
3064 | _("\ | |
3065 | Show whether query if PREC cannot record memory change of next instruction."), | |
3066 | _("\ | |
3067 | Default is OFF.\n\ | |
3068 | When ON, query if PREC cannot record memory change of next instruction."), | |
3069 | NULL, NULL, | |
3070 | &set_record_cmdlist, &show_record_cmdlist); | |
a480d2f6 | 3071 | |
69d05d38 | 3072 | } |