Commit | Line | Data |
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69d05d38 HZ |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
28e7fd62 | 3 | Copyright (C) 2008-2013 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" |
82a90ccf | 36 | #include "observer.h" |
69d05d38 HZ |
37 | |
38 | #include <signal.h> | |
39 | ||
6df67667 MS |
40 | /* This module implements "target record", also known as "process |
41 | record and replay". This target sits on top of a "normal" target | |
42 | (a target that "has execution"), and provides a record and replay | |
43 | functionality, including reverse debugging. | |
44 | ||
45 | Target record has two modes: recording, and replaying. | |
46 | ||
47 | In record mode, we intercept the to_resume and to_wait methods. | |
48 | Whenever gdb resumes the target, we run the target in single step | |
49 | mode, and we build up an execution log in which, for each executed | |
50 | instruction, we record all changes in memory and register state. | |
51 | This is invisible to the user, to whom it just looks like an | |
52 | ordinary debugging session (except for performance degredation). | |
53 | ||
54 | In replay mode, instead of actually letting the inferior run as a | |
55 | process, we simulate its execution by playing back the recorded | |
56 | execution log. For each instruction in the log, we simulate the | |
57 | instruction's side effects by duplicating the changes that it would | |
58 | have made on memory and registers. */ | |
59 | ||
69d05d38 HZ |
60 | #define DEFAULT_RECORD_INSN_MAX_NUM 200000 |
61 | ||
62 | #define RECORD_IS_REPLAY \ | |
63 | (record_list->next || execution_direction == EXEC_REVERSE) | |
64 | ||
0156b218 MS |
65 | #define RECORD_FILE_MAGIC netorder32(0x20091016) |
66 | ||
fda458ee | 67 | /* These are the core structs of the process record functionality. |
69d05d38 | 68 | |
fda458ee | 69 | A record_entry is a record of the value change of a register |
69d05d38 | 70 | ("record_reg") or a part of memory ("record_mem"). And each |
fda458ee MS |
71 | instruction must have a struct record_entry ("record_end") that |
72 | indicates that this is the last struct record_entry of this | |
73 | instruction. | |
69d05d38 | 74 | |
fda458ee MS |
75 | Each struct record_entry is linked to "record_list" by "prev" and |
76 | "next" pointers. */ | |
69d05d38 | 77 | |
69d05d38 HZ |
78 | struct record_mem_entry |
79 | { | |
80 | CORE_ADDR addr; | |
81 | int len; | |
afd0cd3f MS |
82 | /* Set this flag if target memory for this entry |
83 | can no longer be accessed. */ | |
84 | int mem_entry_not_accessible; | |
44389f9b MS |
85 | union |
86 | { | |
87 | gdb_byte *ptr; | |
88 | gdb_byte buf[sizeof (gdb_byte *)]; | |
89 | } u; | |
90 | }; | |
91 | ||
92 | struct record_reg_entry | |
93 | { | |
94 | unsigned short num; | |
95 | unsigned short len; | |
96 | union | |
97 | { | |
98 | gdb_byte *ptr; | |
99 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
100 | } u; | |
69d05d38 HZ |
101 | }; |
102 | ||
8b739a96 HZ |
103 | struct record_end_entry |
104 | { | |
2ea28649 | 105 | enum gdb_signal sigval; |
b54295a7 | 106 | ULONGEST insn_num; |
8b739a96 HZ |
107 | }; |
108 | ||
69d05d38 HZ |
109 | enum record_type |
110 | { | |
111 | record_end = 0, | |
112 | record_reg, | |
113 | record_mem | |
114 | }; | |
115 | ||
6df67667 MS |
116 | /* This is the data structure that makes up the execution log. |
117 | ||
118 | The execution log consists of a single linked list of entries | |
119 | of type "struct record_entry". It is doubly linked so that it | |
120 | can be traversed in either direction. | |
121 | ||
122 | The start of the list is anchored by a struct called | |
123 | "record_first". The pointer "record_list" either points to the | |
124 | last entry that was added to the list (in record mode), or to the | |
125 | next entry in the list that will be executed (in replay mode). | |
126 | ||
127 | Each list element (struct record_entry), in addition to next and | |
128 | prev pointers, consists of a union of three entry types: mem, reg, | |
129 | and end. A field called "type" determines which entry type is | |
130 | represented by a given list element. | |
131 | ||
132 | Each instruction that is added to the execution log is represented | |
133 | by a variable number of list elements ('entries'). The instruction | |
134 | will have one "reg" entry for each register that is changed by | |
135 | executing the instruction (including the PC in every case). It | |
136 | will also have one "mem" entry for each memory change. Finally, | |
137 | each instruction will have an "end" entry that separates it from | |
138 | the changes associated with the next instruction. */ | |
139 | ||
69d05d38 HZ |
140 | struct record_entry |
141 | { | |
142 | struct record_entry *prev; | |
143 | struct record_entry *next; | |
144 | enum record_type type; | |
145 | union | |
146 | { | |
147 | /* reg */ | |
148 | struct record_reg_entry reg; | |
149 | /* mem */ | |
150 | struct record_mem_entry mem; | |
8b739a96 HZ |
151 | /* end */ |
152 | struct record_end_entry end; | |
69d05d38 HZ |
153 | } u; |
154 | }; | |
155 | ||
156 | /* This is the debug switch for process record. */ | |
ccce17b0 | 157 | unsigned int record_debug = 0; |
69d05d38 | 158 | |
bb08c432 HZ |
159 | /* If true, query if PREC cannot record memory |
160 | change of next instruction. */ | |
161 | int record_memory_query = 0; | |
162 | ||
27699eea MS |
163 | struct record_core_buf_entry |
164 | { | |
165 | struct record_core_buf_entry *prev; | |
166 | struct target_section *p; | |
167 | bfd_byte *buf; | |
168 | }; | |
169 | ||
170 | /* Record buf with core target. */ | |
171 | static gdb_byte *record_core_regbuf = NULL; | |
172 | static struct target_section *record_core_start; | |
173 | static struct target_section *record_core_end; | |
174 | static struct record_core_buf_entry *record_core_buf_list = NULL; | |
175 | ||
6df67667 MS |
176 | /* The following variables are used for managing the linked list that |
177 | represents the execution log. | |
178 | ||
179 | record_first is the anchor that holds down the beginning of the list. | |
180 | ||
181 | record_list serves two functions: | |
182 | 1) In record mode, it anchors the end of the list. | |
183 | 2) In replay mode, it traverses the list and points to | |
184 | the next instruction that must be emulated. | |
185 | ||
186 | record_arch_list_head and record_arch_list_tail are used to manage | |
187 | a separate list, which is used to build up the change elements of | |
188 | the currently executing instruction during record mode. When this | |
189 | instruction has been completely annotated in the "arch list", it | |
190 | will be appended to the main execution log. */ | |
191 | ||
69d05d38 HZ |
192 | static struct record_entry record_first; |
193 | static struct record_entry *record_list = &record_first; | |
194 | static struct record_entry *record_arch_list_head = NULL; | |
195 | static struct record_entry *record_arch_list_tail = NULL; | |
196 | ||
197 | /* 1 ask user. 0 auto delete the last struct record_entry. */ | |
198 | static int record_stop_at_limit = 1; | |
b54295a7 | 199 | /* Maximum allowed number of insns in execution log. */ |
191e1813 | 200 | static unsigned int record_insn_max_num = DEFAULT_RECORD_INSN_MAX_NUM; |
b54295a7 | 201 | /* Actual count of insns presently in execution log. */ |
69d05d38 | 202 | static int record_insn_num = 0; |
b54295a7 MS |
203 | /* Count of insns logged so far (may be larger |
204 | than count of insns presently in execution log). */ | |
205 | static ULONGEST record_insn_count; | |
69d05d38 HZ |
206 | |
207 | /* The target_ops of process record. */ | |
208 | static struct target_ops record_ops; | |
27699eea | 209 | static struct target_ops record_core_ops; |
69d05d38 HZ |
210 | |
211 | /* The beneath function pointers. */ | |
212 | static struct target_ops *record_beneath_to_resume_ops; | |
213 | static void (*record_beneath_to_resume) (struct target_ops *, ptid_t, int, | |
2ea28649 | 214 | enum gdb_signal); |
69d05d38 HZ |
215 | static struct target_ops *record_beneath_to_wait_ops; |
216 | static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t, | |
47608cb1 PA |
217 | struct target_waitstatus *, |
218 | int); | |
69d05d38 HZ |
219 | static struct target_ops *record_beneath_to_store_registers_ops; |
220 | static void (*record_beneath_to_store_registers) (struct target_ops *, | |
221 | struct regcache *, | |
222 | int regno); | |
223 | static struct target_ops *record_beneath_to_xfer_partial_ops; | |
224 | static LONGEST (*record_beneath_to_xfer_partial) (struct target_ops *ops, | |
225 | enum target_object object, | |
226 | const char *annex, | |
227 | gdb_byte *readbuf, | |
228 | const gdb_byte *writebuf, | |
229 | ULONGEST offset, | |
230 | LONGEST len); | |
a6d9a66e UW |
231 | static int (*record_beneath_to_insert_breakpoint) (struct gdbarch *, |
232 | struct bp_target_info *); | |
233 | static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *, | |
234 | struct bp_target_info *); | |
9093389c PA |
235 | static int (*record_beneath_to_stopped_by_watchpoint) (void); |
236 | static int (*record_beneath_to_stopped_data_address) (struct target_ops *, | |
237 | CORE_ADDR *); | |
32231432 | 238 | static void (*record_beneath_to_async) (void (*) (enum inferior_event_type, void *), void *); |
69d05d38 | 239 | |
61f75dd8 MS |
240 | /* Alloc and free functions for record_reg, record_mem, and record_end |
241 | entries. */ | |
242 | ||
243 | /* Alloc a record_reg record entry. */ | |
244 | ||
245 | static inline struct record_entry * | |
246 | record_reg_alloc (struct regcache *regcache, int regnum) | |
247 | { | |
248 | struct record_entry *rec; | |
249 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
250 | ||
251 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
252 | rec->type = record_reg; | |
253 | rec->u.reg.num = regnum; | |
44389f9b MS |
254 | rec->u.reg.len = register_size (gdbarch, regnum); |
255 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
256 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
61f75dd8 MS |
257 | |
258 | return rec; | |
259 | } | |
260 | ||
261 | /* Free a record_reg record entry. */ | |
262 | ||
263 | static inline void | |
264 | record_reg_release (struct record_entry *rec) | |
265 | { | |
266 | gdb_assert (rec->type == record_reg); | |
44389f9b MS |
267 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
268 | xfree (rec->u.reg.u.ptr); | |
61f75dd8 MS |
269 | xfree (rec); |
270 | } | |
271 | ||
272 | /* Alloc a record_mem record entry. */ | |
273 | ||
274 | static inline struct record_entry * | |
275 | record_mem_alloc (CORE_ADDR addr, int len) | |
276 | { | |
277 | struct record_entry *rec; | |
278 | ||
279 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
280 | rec->type = record_mem; | |
281 | rec->u.mem.addr = addr; | |
282 | rec->u.mem.len = len; | |
44389f9b MS |
283 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
284 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
61f75dd8 MS |
285 | |
286 | return rec; | |
287 | } | |
288 | ||
289 | /* Free a record_mem record entry. */ | |
290 | ||
291 | static inline void | |
292 | record_mem_release (struct record_entry *rec) | |
293 | { | |
294 | gdb_assert (rec->type == record_mem); | |
44389f9b MS |
295 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
296 | xfree (rec->u.mem.u.ptr); | |
61f75dd8 MS |
297 | xfree (rec); |
298 | } | |
299 | ||
300 | /* Alloc a record_end record entry. */ | |
301 | ||
302 | static inline struct record_entry * | |
303 | record_end_alloc (void) | |
304 | { | |
305 | struct record_entry *rec; | |
306 | ||
307 | rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); | |
308 | rec->type = record_end; | |
309 | ||
310 | return rec; | |
311 | } | |
312 | ||
313 | /* Free a record_end record entry. */ | |
314 | ||
315 | static inline void | |
316 | record_end_release (struct record_entry *rec) | |
317 | { | |
318 | xfree (rec); | |
319 | } | |
320 | ||
321 | /* Free one record entry, any type. | |
322 | Return entry->type, in case caller wants to know. */ | |
323 | ||
324 | static inline enum record_type | |
325 | record_entry_release (struct record_entry *rec) | |
326 | { | |
327 | enum record_type type = rec->type; | |
328 | ||
329 | switch (type) { | |
330 | case record_reg: | |
331 | record_reg_release (rec); | |
332 | break; | |
333 | case record_mem: | |
334 | record_mem_release (rec); | |
335 | break; | |
336 | case record_end: | |
337 | record_end_release (rec); | |
338 | break; | |
339 | } | |
340 | return type; | |
341 | } | |
342 | ||
343 | /* Free all record entries in list pointed to by REC. */ | |
344 | ||
69d05d38 HZ |
345 | static void |
346 | record_list_release (struct record_entry *rec) | |
347 | { | |
69d05d38 HZ |
348 | if (!rec) |
349 | return; | |
350 | ||
351 | while (rec->next) | |
61f75dd8 | 352 | rec = rec->next; |
69d05d38 HZ |
353 | |
354 | while (rec->prev) | |
355 | { | |
69d05d38 | 356 | rec = rec->prev; |
61f75dd8 | 357 | record_entry_release (rec->next); |
69d05d38 HZ |
358 | } |
359 | ||
61f75dd8 MS |
360 | if (rec == &record_first) |
361 | { | |
362 | record_insn_num = 0; | |
363 | record_first.next = NULL; | |
364 | } | |
365 | else | |
366 | record_entry_release (rec); | |
69d05d38 HZ |
367 | } |
368 | ||
61f75dd8 MS |
369 | /* Free all record entries forward of the given list position. */ |
370 | ||
69d05d38 | 371 | static void |
61f75dd8 | 372 | record_list_release_following (struct record_entry *rec) |
69d05d38 | 373 | { |
69d05d38 | 374 | struct record_entry *tmp = rec->next; |
61f75dd8 | 375 | |
69d05d38 HZ |
376 | rec->next = NULL; |
377 | while (tmp) | |
378 | { | |
379 | rec = tmp->next; | |
61f75dd8 | 380 | if (record_entry_release (tmp) == record_end) |
b54295a7 MS |
381 | { |
382 | record_insn_num--; | |
383 | record_insn_count--; | |
384 | } | |
69d05d38 HZ |
385 | tmp = rec; |
386 | } | |
387 | } | |
388 | ||
265aad34 MS |
389 | /* Delete the first instruction from the beginning of the log, to make |
390 | room for adding a new instruction at the end of the log. | |
391 | ||
392 | Note -- this function does not modify record_insn_num. */ | |
393 | ||
69d05d38 HZ |
394 | static void |
395 | record_list_release_first (void) | |
396 | { | |
61f75dd8 | 397 | struct record_entry *tmp; |
69d05d38 HZ |
398 | |
399 | if (!record_first.next) | |
400 | return; | |
401 | ||
61f75dd8 | 402 | /* Loop until a record_end. */ |
69d05d38 HZ |
403 | while (1) |
404 | { | |
61f75dd8 | 405 | /* Cut record_first.next out of the linked list. */ |
69d05d38 HZ |
406 | tmp = record_first.next; |
407 | record_first.next = tmp->next; | |
61f75dd8 MS |
408 | tmp->next->prev = &record_first; |
409 | ||
410 | /* tmp is now isolated, and can be deleted. */ | |
411 | if (record_entry_release (tmp) == record_end) | |
b54295a7 | 412 | break; /* End loop at first record_end. */ |
69d05d38 HZ |
413 | |
414 | if (!record_first.next) | |
415 | { | |
416 | gdb_assert (record_insn_num == 1); | |
61f75dd8 | 417 | break; /* End loop when list is empty. */ |
69d05d38 | 418 | } |
69d05d38 | 419 | } |
69d05d38 HZ |
420 | } |
421 | ||
422 | /* Add a struct record_entry to record_arch_list. */ | |
423 | ||
424 | static void | |
425 | record_arch_list_add (struct record_entry *rec) | |
426 | { | |
427 | if (record_debug > 1) | |
428 | fprintf_unfiltered (gdb_stdlog, | |
429 | "Process record: record_arch_list_add %s.\n", | |
430 | host_address_to_string (rec)); | |
431 | ||
432 | if (record_arch_list_tail) | |
433 | { | |
434 | record_arch_list_tail->next = rec; | |
435 | rec->prev = record_arch_list_tail; | |
436 | record_arch_list_tail = rec; | |
437 | } | |
438 | else | |
439 | { | |
440 | record_arch_list_head = rec; | |
441 | record_arch_list_tail = rec; | |
442 | } | |
443 | } | |
444 | ||
44389f9b MS |
445 | /* Return the value storage location of a record entry. */ |
446 | static inline gdb_byte * | |
447 | record_get_loc (struct record_entry *rec) | |
448 | { | |
449 | switch (rec->type) { | |
450 | case record_mem: | |
451 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
452 | return rec->u.mem.u.ptr; | |
453 | else | |
454 | return rec->u.mem.u.buf; | |
455 | case record_reg: | |
456 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
457 | return rec->u.reg.u.ptr; | |
458 | else | |
459 | return rec->u.reg.u.buf; | |
460 | case record_end: | |
461 | default: | |
f3574227 | 462 | gdb_assert_not_reached ("unexpected record_entry type"); |
44389f9b MS |
463 | return NULL; |
464 | } | |
465 | } | |
466 | ||
467 | /* Record the value of a register NUM to record_arch_list. */ | |
69d05d38 HZ |
468 | |
469 | int | |
61f75dd8 | 470 | record_arch_list_add_reg (struct regcache *regcache, int regnum) |
69d05d38 HZ |
471 | { |
472 | struct record_entry *rec; | |
473 | ||
474 | if (record_debug > 1) | |
475 | fprintf_unfiltered (gdb_stdlog, | |
476 | "Process record: add register num = %d to " | |
477 | "record list.\n", | |
61f75dd8 | 478 | regnum); |
69d05d38 | 479 | |
61f75dd8 | 480 | rec = record_reg_alloc (regcache, regnum); |
69d05d38 | 481 | |
44389f9b | 482 | regcache_raw_read (regcache, regnum, record_get_loc (rec)); |
69d05d38 HZ |
483 | |
484 | record_arch_list_add (rec); | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
4ffa4fc7 PA |
489 | int |
490 | record_read_memory (struct gdbarch *gdbarch, | |
491 | CORE_ADDR memaddr, gdb_byte *myaddr, | |
492 | ssize_t len) | |
493 | { | |
494 | int ret = target_read_memory (memaddr, myaddr, len); | |
495 | ||
496 | if (ret && record_debug) | |
497 | printf_unfiltered (_("Process record: error reading memory " | |
498 | "at addr %s len = %ld.\n"), | |
499 | paddress (gdbarch, memaddr), (long) len); | |
500 | return ret; | |
501 | } | |
502 | ||
69d05d38 HZ |
503 | /* Record the value of a region of memory whose address is ADDR and |
504 | length is LEN to record_arch_list. */ | |
505 | ||
506 | int | |
507 | record_arch_list_add_mem (CORE_ADDR addr, int len) | |
508 | { | |
509 | struct record_entry *rec; | |
510 | ||
511 | if (record_debug > 1) | |
512 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 | 513 | "Process record: add mem addr = %s len = %d to " |
69d05d38 | 514 | "record list.\n", |
f5656ead | 515 | paddress (target_gdbarch (), addr), len); |
69d05d38 | 516 | |
0df8b418 | 517 | if (!addr) /* FIXME: Why? Some arch must permit it... */ |
69d05d38 HZ |
518 | return 0; |
519 | ||
61f75dd8 | 520 | rec = record_mem_alloc (addr, len); |
69d05d38 | 521 | |
f5656ead | 522 | if (record_read_memory (target_gdbarch (), addr, record_get_loc (rec), len)) |
69d05d38 | 523 | { |
61f75dd8 | 524 | record_mem_release (rec); |
69d05d38 HZ |
525 | return -1; |
526 | } | |
527 | ||
528 | record_arch_list_add (rec); | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | /* Add a record_end type struct record_entry to record_arch_list. */ | |
534 | ||
535 | int | |
536 | record_arch_list_add_end (void) | |
537 | { | |
538 | struct record_entry *rec; | |
539 | ||
540 | if (record_debug > 1) | |
541 | fprintf_unfiltered (gdb_stdlog, | |
542 | "Process record: add end to arch list.\n"); | |
543 | ||
61f75dd8 | 544 | rec = record_end_alloc (); |
a493e3e2 | 545 | rec->u.end.sigval = GDB_SIGNAL_0; |
b54295a7 | 546 | rec->u.end.insn_num = ++record_insn_count; |
69d05d38 HZ |
547 | |
548 | record_arch_list_add (rec); | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | static void | |
554 | record_check_insn_num (int set_terminal) | |
555 | { | |
556 | if (record_insn_max_num) | |
557 | { | |
558 | gdb_assert (record_insn_num <= record_insn_max_num); | |
559 | if (record_insn_num == record_insn_max_num) | |
560 | { | |
561 | /* Ask user what to do. */ | |
562 | if (record_stop_at_limit) | |
563 | { | |
564 | int q; | |
123f5f96 | 565 | |
69d05d38 HZ |
566 | if (set_terminal) |
567 | target_terminal_ours (); | |
568 | q = yquery (_("Do you want to auto delete previous execution " | |
569 | "log entries when record/replay buffer becomes " | |
570 | "full (record stop-at-limit)?")); | |
571 | if (set_terminal) | |
572 | target_terminal_inferior (); | |
573 | if (q) | |
574 | record_stop_at_limit = 0; | |
575 | else | |
0156b218 | 576 | error (_("Process record: stopped by user.")); |
69d05d38 HZ |
577 | } |
578 | } | |
579 | } | |
580 | } | |
581 | ||
0156b218 MS |
582 | static void |
583 | record_arch_list_cleanups (void *ignore) | |
584 | { | |
585 | record_list_release (record_arch_list_tail); | |
586 | } | |
587 | ||
69d05d38 HZ |
588 | /* Before inferior step (when GDB record the running message, inferior |
589 | only can step), GDB will call this function to record the values to | |
590 | record_list. This function will call gdbarch_process_record to | |
591 | record the running message of inferior and set them to | |
592 | record_arch_list, and add it to record_list. */ | |
593 | ||
69d05d38 | 594 | static int |
2ea28649 | 595 | record_message (struct regcache *regcache, enum gdb_signal signal) |
69d05d38 HZ |
596 | { |
597 | int ret; | |
e6a386cd | 598 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
0156b218 | 599 | struct cleanup *old_cleanups = make_cleanup (record_arch_list_cleanups, 0); |
69d05d38 HZ |
600 | |
601 | record_arch_list_head = NULL; | |
602 | record_arch_list_tail = NULL; | |
603 | ||
604 | /* Check record_insn_num. */ | |
605 | record_check_insn_num (1); | |
606 | ||
8b739a96 HZ |
607 | /* If gdb sends a signal value to target_resume, |
608 | save it in the 'end' field of the previous instruction. | |
609 | ||
610 | Maybe process record should record what really happened, | |
611 | rather than what gdb pretends has happened. | |
612 | ||
613 | So if Linux delivered the signal to the child process during | |
614 | the record mode, we will record it and deliver it again in | |
615 | the replay mode. | |
616 | ||
617 | If user says "ignore this signal" during the record mode, then | |
618 | it will be ignored again during the replay mode (no matter if | |
619 | the user says something different, like "deliver this signal" | |
620 | during the replay mode). | |
621 | ||
622 | User should understand that nothing he does during the replay | |
623 | mode will change the behavior of the child. If he tries, | |
624 | then that is a user error. | |
625 | ||
626 | But we should still deliver the signal to gdb during the replay, | |
627 | if we delivered it during the recording. Therefore we should | |
628 | record the signal during record_wait, not record_resume. */ | |
629 | if (record_list != &record_first) /* FIXME better way to check */ | |
630 | { | |
631 | gdb_assert (record_list->type == record_end); | |
e6a386cd | 632 | record_list->u.end.sigval = signal; |
8b739a96 HZ |
633 | } |
634 | ||
a493e3e2 | 635 | if (signal == GDB_SIGNAL_0 |
8b739a96 HZ |
636 | || !gdbarch_process_record_signal_p (gdbarch)) |
637 | ret = gdbarch_process_record (gdbarch, | |
e6a386cd HZ |
638 | regcache, |
639 | regcache_read_pc (regcache)); | |
8b739a96 HZ |
640 | else |
641 | ret = gdbarch_process_record_signal (gdbarch, | |
e6a386cd HZ |
642 | regcache, |
643 | signal); | |
8b739a96 | 644 | |
69d05d38 HZ |
645 | if (ret > 0) |
646 | error (_("Process record: inferior program stopped.")); | |
647 | if (ret < 0) | |
648 | error (_("Process record: failed to record execution log.")); | |
649 | ||
650 | discard_cleanups (old_cleanups); | |
651 | ||
652 | record_list->next = record_arch_list_head; | |
653 | record_arch_list_head->prev = record_list; | |
654 | record_list = record_arch_list_tail; | |
655 | ||
656 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
657 | record_list_release_first (); | |
658 | else | |
659 | record_insn_num++; | |
660 | ||
661 | return 1; | |
662 | } | |
663 | ||
e6a386cd HZ |
664 | struct record_message_args { |
665 | struct regcache *regcache; | |
2ea28649 | 666 | enum gdb_signal signal; |
e6a386cd HZ |
667 | }; |
668 | ||
69d05d38 | 669 | static int |
e6a386cd HZ |
670 | record_message_wrapper (void *args) |
671 | { | |
672 | struct record_message_args *record_args = args; | |
673 | ||
674 | return record_message (record_args->regcache, record_args->signal); | |
675 | } | |
676 | ||
677 | static int | |
678 | record_message_wrapper_safe (struct regcache *regcache, | |
2ea28649 | 679 | enum gdb_signal signal) |
69d05d38 | 680 | { |
8b739a96 HZ |
681 | struct record_message_args args; |
682 | ||
683 | args.regcache = regcache; | |
684 | args.signal = signal; | |
e6a386cd HZ |
685 | |
686 | return catch_errors (record_message_wrapper, &args, NULL, RETURN_MASK_ALL); | |
69d05d38 HZ |
687 | } |
688 | ||
689 | /* Set to 1 if record_store_registers and record_xfer_partial | |
690 | doesn't need record. */ | |
691 | ||
692 | static int record_gdb_operation_disable = 0; | |
693 | ||
694 | struct cleanup * | |
695 | record_gdb_operation_disable_set (void) | |
696 | { | |
697 | struct cleanup *old_cleanups = NULL; | |
698 | ||
699 | old_cleanups = | |
700 | make_cleanup_restore_integer (&record_gdb_operation_disable); | |
701 | record_gdb_operation_disable = 1; | |
702 | ||
703 | return old_cleanups; | |
704 | } | |
705 | ||
9093389c PA |
706 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ |
707 | static int record_hw_watchpoint = 0; | |
708 | ||
90ca0479 MS |
709 | /* Execute one instruction from the record log. Each instruction in |
710 | the log will be represented by an arbitrary sequence of register | |
711 | entries and memory entries, followed by an 'end' entry. */ | |
712 | ||
713 | static inline void | |
714 | record_exec_insn (struct regcache *regcache, struct gdbarch *gdbarch, | |
715 | struct record_entry *entry) | |
716 | { | |
717 | switch (entry->type) | |
718 | { | |
719 | case record_reg: /* reg */ | |
720 | { | |
721 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
722 | ||
723 | if (record_debug > 1) | |
724 | fprintf_unfiltered (gdb_stdlog, | |
725 | "Process record: record_reg %s to " | |
726 | "inferior num = %d.\n", | |
727 | host_address_to_string (entry), | |
728 | entry->u.reg.num); | |
729 | ||
730 | regcache_cooked_read (regcache, entry->u.reg.num, reg); | |
731 | regcache_cooked_write (regcache, entry->u.reg.num, | |
732 | record_get_loc (entry)); | |
733 | memcpy (record_get_loc (entry), reg, entry->u.reg.len); | |
734 | } | |
735 | break; | |
736 | ||
737 | case record_mem: /* mem */ | |
738 | { | |
739 | /* Nothing to do if the entry is flagged not_accessible. */ | |
740 | if (!entry->u.mem.mem_entry_not_accessible) | |
741 | { | |
742 | gdb_byte *mem = alloca (entry->u.mem.len); | |
743 | ||
744 | if (record_debug > 1) | |
745 | fprintf_unfiltered (gdb_stdlog, | |
746 | "Process record: record_mem %s to " | |
747 | "inferior addr = %s len = %d.\n", | |
748 | host_address_to_string (entry), | |
749 | paddress (gdbarch, entry->u.mem.addr), | |
750 | entry->u.mem.len); | |
751 | ||
4ffa4fc7 PA |
752 | if (record_read_memory (gdbarch, |
753 | entry->u.mem.addr, mem, entry->u.mem.len)) | |
754 | entry->u.mem.mem_entry_not_accessible = 1; | |
90ca0479 MS |
755 | else |
756 | { | |
757 | if (target_write_memory (entry->u.mem.addr, | |
758 | record_get_loc (entry), | |
759 | entry->u.mem.len)) | |
760 | { | |
761 | entry->u.mem.mem_entry_not_accessible = 1; | |
762 | if (record_debug) | |
7ea6d463 PM |
763 | warning (_("Process record: error writing memory at " |
764 | "addr = %s len = %d."), | |
90ca0479 MS |
765 | paddress (gdbarch, entry->u.mem.addr), |
766 | entry->u.mem.len); | |
767 | } | |
768 | else | |
9093389c PA |
769 | { |
770 | memcpy (record_get_loc (entry), mem, entry->u.mem.len); | |
771 | ||
772 | /* We've changed memory --- check if a hardware | |
773 | watchpoint should trap. Note that this | |
774 | presently assumes the target beneath supports | |
775 | continuable watchpoints. On non-continuable | |
776 | watchpoints target, we'll want to check this | |
777 | _before_ actually doing the memory change, and | |
778 | not doing the change at all if the watchpoint | |
779 | traps. */ | |
780 | if (hardware_watchpoint_inserted_in_range | |
781 | (get_regcache_aspace (regcache), | |
782 | entry->u.mem.addr, entry->u.mem.len)) | |
783 | record_hw_watchpoint = 1; | |
784 | } | |
90ca0479 MS |
785 | } |
786 | } | |
787 | } | |
788 | break; | |
789 | } | |
790 | } | |
791 | ||
27699eea MS |
792 | static struct target_ops *tmp_to_resume_ops; |
793 | static void (*tmp_to_resume) (struct target_ops *, ptid_t, int, | |
2ea28649 | 794 | enum gdb_signal); |
27699eea MS |
795 | static struct target_ops *tmp_to_wait_ops; |
796 | static ptid_t (*tmp_to_wait) (struct target_ops *, ptid_t, | |
797 | struct target_waitstatus *, | |
798 | int); | |
799 | static struct target_ops *tmp_to_store_registers_ops; | |
800 | static void (*tmp_to_store_registers) (struct target_ops *, | |
801 | struct regcache *, | |
802 | int regno); | |
803 | static struct target_ops *tmp_to_xfer_partial_ops; | |
804 | static LONGEST (*tmp_to_xfer_partial) (struct target_ops *ops, | |
805 | enum target_object object, | |
806 | const char *annex, | |
807 | gdb_byte *readbuf, | |
808 | const gdb_byte *writebuf, | |
809 | ULONGEST offset, | |
810 | LONGEST len); | |
811 | static int (*tmp_to_insert_breakpoint) (struct gdbarch *, | |
812 | struct bp_target_info *); | |
813 | static int (*tmp_to_remove_breakpoint) (struct gdbarch *, | |
814 | struct bp_target_info *); | |
9093389c PA |
815 | static int (*tmp_to_stopped_by_watchpoint) (void); |
816 | static int (*tmp_to_stopped_data_address) (struct target_ops *, CORE_ADDR *); | |
32231432 PA |
817 | static int (*tmp_to_stopped_data_address) (struct target_ops *, CORE_ADDR *); |
818 | static void (*tmp_to_async) (void (*) (enum inferior_event_type, void *), void *); | |
27699eea | 819 | |
0156b218 MS |
820 | static void record_restore (void); |
821 | ||
32231432 PA |
822 | /* Asynchronous signal handle registered as event loop source for when |
823 | we have pending events ready to be passed to the core. */ | |
824 | ||
825 | static struct async_event_handler *record_async_inferior_event_token; | |
826 | ||
827 | static void | |
828 | record_async_inferior_event_handler (gdb_client_data data) | |
829 | { | |
830 | inferior_event_handler (INF_REG_EVENT, NULL); | |
831 | } | |
832 | ||
27699eea | 833 | /* Open the process record target. */ |
6df67667 | 834 | |
69d05d38 | 835 | static void |
27699eea MS |
836 | record_core_open_1 (char *name, int from_tty) |
837 | { | |
838 | struct regcache *regcache = get_current_regcache (); | |
839 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
840 | int i; | |
841 | ||
842 | /* Get record_core_regbuf. */ | |
843 | target_fetch_registers (regcache, -1); | |
844 | record_core_regbuf = xmalloc (MAX_REGISTER_SIZE * regnum); | |
845 | for (i = 0; i < regnum; i ++) | |
846 | regcache_raw_collect (regcache, i, | |
847 | record_core_regbuf + MAX_REGISTER_SIZE * i); | |
848 | ||
849 | /* Get record_core_start and record_core_end. */ | |
850 | if (build_section_table (core_bfd, &record_core_start, &record_core_end)) | |
851 | { | |
852 | xfree (record_core_regbuf); | |
853 | record_core_regbuf = NULL; | |
854 | error (_("\"%s\": Can't find sections: %s"), | |
855 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
856 | } | |
857 | ||
858 | push_target (&record_core_ops); | |
0156b218 | 859 | record_restore (); |
27699eea MS |
860 | } |
861 | ||
862 | /* "to_open" target method for 'live' processes. */ | |
863 | ||
864 | static void | |
865 | record_open_1 (char *name, int from_tty) | |
69d05d38 | 866 | { |
69d05d38 HZ |
867 | if (record_debug) |
868 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
869 | ||
870 | /* check exec */ | |
871 | if (!target_has_execution) | |
872 | error (_("Process record: the program is not being run.")); | |
873 | if (non_stop) | |
874 | error (_("Process record target can't debug inferior in non-stop mode " | |
875 | "(non-stop).")); | |
69d05d38 | 876 | |
f5656ead | 877 | if (!gdbarch_process_record_p (target_gdbarch ())) |
69d05d38 HZ |
878 | error (_("Process record: the current architecture doesn't support " |
879 | "record function.")); | |
880 | ||
27699eea MS |
881 | if (!tmp_to_resume) |
882 | error (_("Could not find 'to_resume' method on the target stack.")); | |
883 | if (!tmp_to_wait) | |
884 | error (_("Could not find 'to_wait' method on the target stack.")); | |
885 | if (!tmp_to_store_registers) | |
3e43a32a MS |
886 | error (_("Could not find 'to_store_registers' " |
887 | "method on the target stack.")); | |
27699eea | 888 | if (!tmp_to_insert_breakpoint) |
3e43a32a MS |
889 | error (_("Could not find 'to_insert_breakpoint' " |
890 | "method on the target stack.")); | |
27699eea | 891 | if (!tmp_to_remove_breakpoint) |
3e43a32a MS |
892 | error (_("Could not find 'to_remove_breakpoint' " |
893 | "method on the target stack.")); | |
7155de5a | 894 | if (!tmp_to_stopped_by_watchpoint) |
3e43a32a MS |
895 | error (_("Could not find 'to_stopped_by_watchpoint' " |
896 | "method on the target stack.")); | |
7155de5a | 897 | if (!tmp_to_stopped_data_address) |
3e43a32a MS |
898 | error (_("Could not find 'to_stopped_data_address' " |
899 | "method on the target stack.")); | |
27699eea MS |
900 | |
901 | push_target (&record_ops); | |
902 | } | |
903 | ||
20388dd6 YQ |
904 | static void record_init_record_breakpoints (void); |
905 | ||
27699eea MS |
906 | /* "to_open" target method. Open the process record target. */ |
907 | ||
908 | static void | |
909 | record_open (char *name, int from_tty) | |
910 | { | |
911 | struct target_ops *t; | |
912 | ||
913 | if (record_debug) | |
914 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); | |
915 | ||
69d05d38 HZ |
916 | /* Check if record target is already running. */ |
917 | if (current_target.to_stratum == record_stratum) | |
5d40bb85 HZ |
918 | error (_("Process record target already running. Use \"record stop\" to " |
919 | "stop record target first.")); | |
69d05d38 | 920 | |
27699eea MS |
921 | /* Reset the tmp beneath pointers. */ |
922 | tmp_to_resume_ops = NULL; | |
923 | tmp_to_resume = NULL; | |
924 | tmp_to_wait_ops = NULL; | |
925 | tmp_to_wait = NULL; | |
926 | tmp_to_store_registers_ops = NULL; | |
927 | tmp_to_store_registers = NULL; | |
928 | tmp_to_xfer_partial_ops = NULL; | |
929 | tmp_to_xfer_partial = NULL; | |
930 | tmp_to_insert_breakpoint = NULL; | |
931 | tmp_to_remove_breakpoint = NULL; | |
7155de5a HZ |
932 | tmp_to_stopped_by_watchpoint = NULL; |
933 | tmp_to_stopped_data_address = NULL; | |
32231432 | 934 | tmp_to_async = NULL; |
69d05d38 HZ |
935 | |
936 | /* Set the beneath function pointers. */ | |
937 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
938 | { | |
27699eea | 939 | if (!tmp_to_resume) |
69d05d38 | 940 | { |
27699eea MS |
941 | tmp_to_resume = t->to_resume; |
942 | tmp_to_resume_ops = t; | |
69d05d38 | 943 | } |
27699eea | 944 | if (!tmp_to_wait) |
69d05d38 | 945 | { |
27699eea MS |
946 | tmp_to_wait = t->to_wait; |
947 | tmp_to_wait_ops = t; | |
69d05d38 | 948 | } |
27699eea | 949 | if (!tmp_to_store_registers) |
69d05d38 | 950 | { |
27699eea MS |
951 | tmp_to_store_registers = t->to_store_registers; |
952 | tmp_to_store_registers_ops = t; | |
69d05d38 | 953 | } |
27699eea | 954 | if (!tmp_to_xfer_partial) |
69d05d38 | 955 | { |
27699eea MS |
956 | tmp_to_xfer_partial = t->to_xfer_partial; |
957 | tmp_to_xfer_partial_ops = t; | |
69d05d38 | 958 | } |
27699eea MS |
959 | if (!tmp_to_insert_breakpoint) |
960 | tmp_to_insert_breakpoint = t->to_insert_breakpoint; | |
961 | if (!tmp_to_remove_breakpoint) | |
962 | tmp_to_remove_breakpoint = t->to_remove_breakpoint; | |
9093389c PA |
963 | if (!tmp_to_stopped_by_watchpoint) |
964 | tmp_to_stopped_by_watchpoint = t->to_stopped_by_watchpoint; | |
965 | if (!tmp_to_stopped_data_address) | |
966 | tmp_to_stopped_data_address = t->to_stopped_data_address; | |
32231432 PA |
967 | if (!tmp_to_async) |
968 | tmp_to_async = t->to_async; | |
69d05d38 | 969 | } |
27699eea MS |
970 | if (!tmp_to_xfer_partial) |
971 | error (_("Could not find 'to_xfer_partial' method on the target stack.")); | |
69d05d38 HZ |
972 | |
973 | /* Reset */ | |
974 | record_insn_num = 0; | |
b54295a7 | 975 | record_insn_count = 0; |
69d05d38 HZ |
976 | record_list = &record_first; |
977 | record_list->next = NULL; | |
27699eea MS |
978 | |
979 | /* Set the tmp beneath pointers to beneath pointers. */ | |
980 | record_beneath_to_resume_ops = tmp_to_resume_ops; | |
981 | record_beneath_to_resume = tmp_to_resume; | |
982 | record_beneath_to_wait_ops = tmp_to_wait_ops; | |
983 | record_beneath_to_wait = tmp_to_wait; | |
984 | record_beneath_to_store_registers_ops = tmp_to_store_registers_ops; | |
985 | record_beneath_to_store_registers = tmp_to_store_registers; | |
986 | record_beneath_to_xfer_partial_ops = tmp_to_xfer_partial_ops; | |
987 | record_beneath_to_xfer_partial = tmp_to_xfer_partial; | |
988 | record_beneath_to_insert_breakpoint = tmp_to_insert_breakpoint; | |
989 | record_beneath_to_remove_breakpoint = tmp_to_remove_breakpoint; | |
9093389c PA |
990 | record_beneath_to_stopped_by_watchpoint = tmp_to_stopped_by_watchpoint; |
991 | record_beneath_to_stopped_data_address = tmp_to_stopped_data_address; | |
32231432 | 992 | record_beneath_to_async = tmp_to_async; |
27699eea | 993 | |
c0edd9ed | 994 | if (core_bfd) |
27699eea MS |
995 | record_core_open_1 (name, from_tty); |
996 | else | |
997 | record_open_1 (name, from_tty); | |
32231432 PA |
998 | |
999 | /* Register extra event sources in the event loop. */ | |
1000 | record_async_inferior_event_token | |
1001 | = create_async_event_handler (record_async_inferior_event_handler, | |
1002 | NULL); | |
20388dd6 YQ |
1003 | |
1004 | record_init_record_breakpoints (); | |
82a90ccf YQ |
1005 | |
1006 | observer_notify_record_changed (current_inferior (), 1); | |
69d05d38 HZ |
1007 | } |
1008 | ||
6df67667 MS |
1009 | /* "to_close" target method. Close the process record target. */ |
1010 | ||
69d05d38 HZ |
1011 | static void |
1012 | record_close (int quitting) | |
1013 | { | |
27699eea MS |
1014 | struct record_core_buf_entry *entry; |
1015 | ||
69d05d38 HZ |
1016 | if (record_debug) |
1017 | fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n"); | |
1018 | ||
1019 | record_list_release (record_list); | |
27699eea MS |
1020 | |
1021 | /* Release record_core_regbuf. */ | |
1022 | if (record_core_regbuf) | |
1023 | { | |
1024 | xfree (record_core_regbuf); | |
1025 | record_core_regbuf = NULL; | |
1026 | } | |
1027 | ||
1028 | /* Release record_core_buf_list. */ | |
1029 | if (record_core_buf_list) | |
1030 | { | |
1031 | for (entry = record_core_buf_list->prev; entry; entry = entry->prev) | |
1032 | { | |
1033 | xfree (record_core_buf_list); | |
1034 | record_core_buf_list = entry; | |
1035 | } | |
1036 | record_core_buf_list = NULL; | |
1037 | } | |
32231432 PA |
1038 | |
1039 | if (record_async_inferior_event_token) | |
1040 | delete_async_event_handler (&record_async_inferior_event_token); | |
69d05d38 HZ |
1041 | } |
1042 | ||
1043 | static int record_resume_step = 0; | |
69d05d38 | 1044 | |
32231432 PA |
1045 | /* True if we've been resumed, and so each record_wait call should |
1046 | advance execution. If this is false, record_wait will return a | |
1047 | TARGET_WAITKIND_IGNORE. */ | |
1048 | static int record_resumed = 0; | |
1049 | ||
1050 | /* The execution direction of the last resume we got. This is | |
1051 | necessary for async mode. Vis (order is not strictly accurate): | |
1052 | ||
1053 | 1. user has the global execution direction set to forward | |
1054 | 2. user does a reverse-step command | |
1055 | 3. record_resume is called with global execution direction | |
1056 | temporarily switched to reverse | |
1057 | 4. GDB's execution direction is reverted back to forward | |
1058 | 5. target record notifies event loop there's an event to handle | |
1059 | 6. infrun asks the target which direction was it going, and switches | |
1060 | the global execution direction accordingly (to reverse) | |
1061 | 7. infrun polls an event out of the record target, and handles it | |
1062 | 8. GDB goes back to the event loop, and goto #4. | |
1063 | */ | |
1064 | static enum exec_direction_kind record_execution_dir = EXEC_FORWARD; | |
1065 | ||
6df67667 MS |
1066 | /* "to_resume" target method. Resume the process record target. */ |
1067 | ||
69d05d38 HZ |
1068 | static void |
1069 | record_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1070 | enum gdb_signal signal) |
69d05d38 HZ |
1071 | { |
1072 | record_resume_step = step; | |
32231432 PA |
1073 | record_resumed = 1; |
1074 | record_execution_dir = execution_direction; | |
69d05d38 HZ |
1075 | |
1076 | if (!RECORD_IS_REPLAY) | |
1077 | { | |
f02253f1 HZ |
1078 | struct gdbarch *gdbarch = target_thread_architecture (ptid); |
1079 | ||
e6a386cd | 1080 | record_message (get_current_regcache (), signal); |
f02253f1 HZ |
1081 | |
1082 | if (!step) | |
1083 | { | |
1084 | /* This is not hard single step. */ | |
1085 | if (!gdbarch_software_single_step_p (gdbarch)) | |
1086 | { | |
1087 | /* This is a normal continue. */ | |
1088 | step = 1; | |
1089 | } | |
1090 | else | |
1091 | { | |
1092 | /* This arch support soft sigle step. */ | |
1093 | if (single_step_breakpoints_inserted ()) | |
1094 | { | |
1095 | /* This is a soft single step. */ | |
1096 | record_resume_step = 1; | |
1097 | } | |
1098 | else | |
1099 | { | |
1100 | /* This is a continue. | |
1101 | Try to insert a soft single step breakpoint. */ | |
1102 | if (!gdbarch_software_single_step (gdbarch, | |
1103 | get_current_frame ())) | |
1104 | { | |
1105 | /* This system don't want use soft single step. | |
1106 | Use hard sigle step. */ | |
1107 | step = 1; | |
1108 | } | |
1109 | } | |
1110 | } | |
1111 | } | |
1112 | ||
90f47860 PA |
1113 | /* Make sure the target beneath reports all signals. */ |
1114 | target_pass_signals (0, NULL); | |
1115 | ||
f02253f1 HZ |
1116 | record_beneath_to_resume (record_beneath_to_resume_ops, |
1117 | ptid, step, signal); | |
69d05d38 | 1118 | } |
32231432 PA |
1119 | |
1120 | /* We are about to start executing the inferior (or simulate it), | |
1121 | let's register it with the event loop. */ | |
1122 | if (target_can_async_p ()) | |
1123 | { | |
1124 | target_async (inferior_event_handler, 0); | |
1125 | /* Notify the event loop there's an event to wait for. We do | |
1126 | most of the work in record_wait. */ | |
1127 | mark_async_event_handler (record_async_inferior_event_token); | |
1128 | } | |
69d05d38 HZ |
1129 | } |
1130 | ||
1131 | static int record_get_sig = 0; | |
1132 | ||
6df67667 MS |
1133 | /* SIGINT signal handler, registered by "to_wait" method. */ |
1134 | ||
69d05d38 HZ |
1135 | static void |
1136 | record_sig_handler (int signo) | |
1137 | { | |
1138 | if (record_debug) | |
1139 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1140 | ||
1141 | /* It will break the running inferior in replay mode. */ | |
1142 | record_resume_step = 1; | |
1143 | ||
1144 | /* It will let record_wait set inferior status to get the signal | |
1145 | SIGINT. */ | |
1146 | record_get_sig = 1; | |
1147 | } | |
1148 | ||
1149 | static void | |
1150 | record_wait_cleanups (void *ignore) | |
1151 | { | |
1152 | if (execution_direction == EXEC_REVERSE) | |
1153 | { | |
1154 | if (record_list->next) | |
1155 | record_list = record_list->next; | |
1156 | } | |
1157 | else | |
1158 | record_list = record_list->prev; | |
1159 | } | |
1160 | ||
6df67667 MS |
1161 | /* "to_wait" target method for process record target. |
1162 | ||
1163 | In record mode, the target is always run in singlestep mode | |
1164 | (even when gdb says to continue). The to_wait method intercepts | |
1165 | the stop events and determines which ones are to be passed on to | |
1166 | gdb. Most stop events are just singlestep events that gdb is not | |
1167 | to know about, so the to_wait method just records them and keeps | |
1168 | singlestepping. | |
1169 | ||
1170 | In replay mode, this function emulates the recorded execution log, | |
1171 | one instruction at a time (forward or backward), and determines | |
1172 | where to stop. */ | |
69d05d38 HZ |
1173 | |
1174 | static ptid_t | |
32231432 PA |
1175 | record_wait_1 (struct target_ops *ops, |
1176 | ptid_t ptid, struct target_waitstatus *status, | |
1177 | int options) | |
69d05d38 HZ |
1178 | { |
1179 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
1180 | ||
1181 | if (record_debug) | |
1182 | fprintf_unfiltered (gdb_stdlog, | |
1183 | "Process record: record_wait " | |
32231432 PA |
1184 | "record_resume_step = %d, record_resumed = %d, direction=%s\n", |
1185 | record_resume_step, record_resumed, | |
1186 | record_execution_dir == EXEC_FORWARD ? "forward" : "reverse"); | |
1187 | ||
1188 | if (!record_resumed) | |
1189 | { | |
1190 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1191 | ||
1192 | /* No interesting event. */ | |
1193 | status->kind = TARGET_WAITKIND_IGNORE; | |
1194 | return minus_one_ptid; | |
1195 | } | |
69d05d38 | 1196 | |
eaaffdf4 HZ |
1197 | record_get_sig = 0; |
1198 | signal (SIGINT, record_sig_handler); | |
1199 | ||
27699eea | 1200 | if (!RECORD_IS_REPLAY && ops != &record_core_ops) |
69d05d38 | 1201 | { |
69d05d38 HZ |
1202 | if (record_resume_step) |
1203 | { | |
1204 | /* This is a single step. */ | |
1205 | return record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 1206 | ptid, status, options); |
69d05d38 HZ |
1207 | } |
1208 | else | |
1209 | { | |
1210 | /* This is not a single step. */ | |
1211 | ptid_t ret; | |
1212 | CORE_ADDR tmp_pc; | |
f02253f1 | 1213 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); |
69d05d38 HZ |
1214 | |
1215 | while (1) | |
1216 | { | |
1217 | ret = record_beneath_to_wait (record_beneath_to_wait_ops, | |
90092760 | 1218 | ptid, status, options); |
32231432 PA |
1219 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1220 | { | |
1221 | if (record_debug) | |
1222 | fprintf_unfiltered (gdb_stdlog, | |
1223 | "Process record: record_wait " | |
1224 | "target beneath not done yet\n"); | |
1225 | return ret; | |
1226 | } | |
69d05d38 | 1227 | |
f02253f1 HZ |
1228 | if (single_step_breakpoints_inserted ()) |
1229 | remove_single_step_breakpoints (); | |
1230 | ||
eaaffdf4 | 1231 | if (record_resume_step) |
32231432 | 1232 | return ret; |
eaaffdf4 | 1233 | |
8b739a96 | 1234 | /* Is this a SIGTRAP? */ |
69d05d38 | 1235 | if (status->kind == TARGET_WAITKIND_STOPPED |
a493e3e2 | 1236 | && status->value.sig == GDB_SIGNAL_TRAP) |
69d05d38 | 1237 | { |
6c95b8df | 1238 | struct regcache *regcache; |
a9840291 | 1239 | struct address_space *aspace; |
6c95b8df | 1240 | |
9093389c PA |
1241 | /* Yes -- this is likely our single-step finishing, |
1242 | but check if there's any reason the core would be | |
1243 | interested in the event. */ | |
1244 | ||
69d05d38 | 1245 | registers_changed (); |
6c95b8df PA |
1246 | regcache = get_current_regcache (); |
1247 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1248 | aspace = get_regcache_aspace (regcache); |
9093389c PA |
1249 | |
1250 | if (target_stopped_by_watchpoint ()) | |
1251 | { | |
1252 | /* Always interested in watchpoints. */ | |
1253 | } | |
a9840291 | 1254 | else if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1255 | { |
9093389c PA |
1256 | /* There is a breakpoint here. Let the core |
1257 | handle it. */ | |
a9840291 PA |
1258 | if (software_breakpoint_inserted_here_p (aspace, tmp_pc)) |
1259 | { | |
3e43a32a MS |
1260 | struct gdbarch *gdbarch |
1261 | = get_regcache_arch (regcache); | |
a9840291 PA |
1262 | CORE_ADDR decr_pc_after_break |
1263 | = gdbarch_decr_pc_after_break (gdbarch); | |
1264 | if (decr_pc_after_break) | |
1265 | regcache_write_pc (regcache, | |
1266 | tmp_pc + decr_pc_after_break); | |
1267 | } | |
69d05d38 HZ |
1268 | } |
1269 | else | |
1270 | { | |
f02253f1 HZ |
1271 | /* This is a single-step trap. Record the |
1272 | insn and issue another step. | |
1273 | FIXME: this part can be a random SIGTRAP too. | |
1274 | But GDB cannot handle it. */ | |
1275 | int step = 1; | |
1276 | ||
e6a386cd | 1277 | if (!record_message_wrapper_safe (regcache, |
a493e3e2 | 1278 | GDB_SIGNAL_0)) |
e6a386cd HZ |
1279 | { |
1280 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1281 | status->value.sig = GDB_SIGNAL_0; |
e6a386cd HZ |
1282 | break; |
1283 | } | |
6c95b8df | 1284 | |
f02253f1 HZ |
1285 | if (gdbarch_software_single_step_p (gdbarch)) |
1286 | { | |
1287 | /* Try to insert the software single step breakpoint. | |
1288 | If insert success, set step to 0. */ | |
1289 | set_executing (inferior_ptid, 0); | |
1290 | reinit_frame_cache (); | |
1291 | if (gdbarch_software_single_step (gdbarch, | |
1292 | get_current_frame ())) | |
1293 | step = 0; | |
1294 | set_executing (inferior_ptid, 1); | |
1295 | } | |
1296 | ||
32231432 PA |
1297 | if (record_debug) |
1298 | fprintf_unfiltered (gdb_stdlog, | |
1299 | "Process record: record_wait " | |
1300 | "issuing one more step in the target beneath\n"); | |
69d05d38 | 1301 | record_beneath_to_resume (record_beneath_to_resume_ops, |
f02253f1 | 1302 | ptid, step, |
a493e3e2 | 1303 | GDB_SIGNAL_0); |
69d05d38 HZ |
1304 | continue; |
1305 | } | |
1306 | } | |
1307 | ||
1308 | /* The inferior is broken by a breakpoint or a signal. */ | |
1309 | break; | |
1310 | } | |
1311 | ||
1312 | return ret; | |
1313 | } | |
1314 | } | |
1315 | else | |
1316 | { | |
1317 | struct regcache *regcache = get_current_regcache (); | |
5af949e3 | 1318 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
a9840291 | 1319 | struct address_space *aspace = get_regcache_aspace (regcache); |
69d05d38 HZ |
1320 | int continue_flag = 1; |
1321 | int first_record_end = 1; | |
1322 | struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0); | |
1323 | CORE_ADDR tmp_pc; | |
1324 | ||
9093389c | 1325 | record_hw_watchpoint = 0; |
69d05d38 HZ |
1326 | status->kind = TARGET_WAITKIND_STOPPED; |
1327 | ||
1328 | /* Check breakpoint when forward execute. */ | |
1329 | if (execution_direction == EXEC_FORWARD) | |
1330 | { | |
1331 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1332 | if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1333 | { |
a9840291 PA |
1334 | int decr_pc_after_break = gdbarch_decr_pc_after_break (gdbarch); |
1335 | ||
69d05d38 HZ |
1336 | if (record_debug) |
1337 | fprintf_unfiltered (gdb_stdlog, | |
5af949e3 UW |
1338 | "Process record: break at %s.\n", |
1339 | paddress (gdbarch, tmp_pc)); | |
a9840291 PA |
1340 | |
1341 | if (decr_pc_after_break | |
1342 | && !record_resume_step | |
1343 | && software_breakpoint_inserted_here_p (aspace, tmp_pc)) | |
69d05d38 | 1344 | regcache_write_pc (regcache, |
a9840291 | 1345 | tmp_pc + decr_pc_after_break); |
69d05d38 HZ |
1346 | goto replay_out; |
1347 | } | |
1348 | } | |
1349 | ||
69d05d38 HZ |
1350 | /* If GDB is in terminal_inferior mode, it will not get the signal. |
1351 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1352 | mode, because inferior will not executed. | |
1353 | Then set it to terminal_ours to make GDB get the signal. */ | |
1354 | target_terminal_ours (); | |
1355 | ||
1356 | /* In EXEC_FORWARD mode, record_list points to the tail of prev | |
1357 | instruction. */ | |
1358 | if (execution_direction == EXEC_FORWARD && record_list->next) | |
1359 | record_list = record_list->next; | |
1360 | ||
1361 | /* Loop over the record_list, looking for the next place to | |
1362 | stop. */ | |
1363 | do | |
1364 | { | |
1365 | /* Check for beginning and end of log. */ | |
1366 | if (execution_direction == EXEC_REVERSE | |
1367 | && record_list == &record_first) | |
1368 | { | |
1369 | /* Hit beginning of record log in reverse. */ | |
1370 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1371 | break; | |
1372 | } | |
1373 | if (execution_direction != EXEC_REVERSE && !record_list->next) | |
1374 | { | |
1375 | /* Hit end of record log going forward. */ | |
1376 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1377 | break; | |
1378 | } | |
1379 | ||
90ca0479 MS |
1380 | record_exec_insn (regcache, gdbarch, record_list); |
1381 | ||
1382 | if (record_list->type == record_end) | |
69d05d38 HZ |
1383 | { |
1384 | if (record_debug > 1) | |
1385 | fprintf_unfiltered (gdb_stdlog, | |
1386 | "Process record: record_end %s to " | |
1387 | "inferior.\n", | |
1388 | host_address_to_string (record_list)); | |
1389 | ||
1390 | if (first_record_end && execution_direction == EXEC_REVERSE) | |
1391 | { | |
1392 | /* When reverse excute, the first record_end is the part of | |
1393 | current instruction. */ | |
1394 | first_record_end = 0; | |
1395 | } | |
1396 | else | |
1397 | { | |
1398 | /* In EXEC_REVERSE mode, this is the record_end of prev | |
1399 | instruction. | |
1400 | In EXEC_FORWARD mode, this is the record_end of current | |
1401 | instruction. */ | |
1402 | /* step */ | |
1403 | if (record_resume_step) | |
1404 | { | |
1405 | if (record_debug > 1) | |
1406 | fprintf_unfiltered (gdb_stdlog, | |
1407 | "Process record: step.\n"); | |
1408 | continue_flag = 0; | |
1409 | } | |
1410 | ||
1411 | /* check breakpoint */ | |
1412 | tmp_pc = regcache_read_pc (regcache); | |
a9840291 | 1413 | if (breakpoint_inserted_here_p (aspace, tmp_pc)) |
69d05d38 | 1414 | { |
a9840291 PA |
1415 | int decr_pc_after_break |
1416 | = gdbarch_decr_pc_after_break (gdbarch); | |
1417 | ||
69d05d38 HZ |
1418 | if (record_debug) |
1419 | fprintf_unfiltered (gdb_stdlog, | |
1420 | "Process record: break " | |
5af949e3 UW |
1421 | "at %s.\n", |
1422 | paddress (gdbarch, tmp_pc)); | |
a9840291 | 1423 | if (decr_pc_after_break |
69d05d38 | 1424 | && execution_direction == EXEC_FORWARD |
a9840291 PA |
1425 | && !record_resume_step |
1426 | && software_breakpoint_inserted_here_p (aspace, | |
1427 | tmp_pc)) | |
69d05d38 | 1428 | regcache_write_pc (regcache, |
a9840291 | 1429 | tmp_pc + decr_pc_after_break); |
69d05d38 HZ |
1430 | continue_flag = 0; |
1431 | } | |
9093389c PA |
1432 | |
1433 | if (record_hw_watchpoint) | |
1434 | { | |
1435 | if (record_debug) | |
3e43a32a MS |
1436 | fprintf_unfiltered (gdb_stdlog, |
1437 | "Process record: hit hw " | |
1438 | "watchpoint.\n"); | |
9093389c PA |
1439 | continue_flag = 0; |
1440 | } | |
8b739a96 | 1441 | /* Check target signal */ |
a493e3e2 | 1442 | if (record_list->u.end.sigval != GDB_SIGNAL_0) |
8b739a96 HZ |
1443 | /* FIXME: better way to check */ |
1444 | continue_flag = 0; | |
69d05d38 HZ |
1445 | } |
1446 | } | |
1447 | ||
1448 | if (continue_flag) | |
1449 | { | |
1450 | if (execution_direction == EXEC_REVERSE) | |
1451 | { | |
1452 | if (record_list->prev) | |
1453 | record_list = record_list->prev; | |
1454 | } | |
1455 | else | |
1456 | { | |
1457 | if (record_list->next) | |
1458 | record_list = record_list->next; | |
1459 | } | |
1460 | } | |
1461 | } | |
1462 | while (continue_flag); | |
1463 | ||
69d05d38 HZ |
1464 | replay_out: |
1465 | if (record_get_sig) | |
a493e3e2 PA |
1466 | status->value.sig = GDB_SIGNAL_INT; |
1467 | else if (record_list->u.end.sigval != GDB_SIGNAL_0) | |
8b739a96 HZ |
1468 | /* FIXME: better way to check */ |
1469 | status->value.sig = record_list->u.end.sigval; | |
69d05d38 | 1470 | else |
a493e3e2 | 1471 | status->value.sig = GDB_SIGNAL_TRAP; |
69d05d38 HZ |
1472 | |
1473 | discard_cleanups (old_cleanups); | |
1474 | } | |
1475 | ||
eaaffdf4 HZ |
1476 | signal (SIGINT, handle_sigint); |
1477 | ||
69d05d38 HZ |
1478 | do_cleanups (set_cleanups); |
1479 | return inferior_ptid; | |
1480 | } | |
1481 | ||
32231432 PA |
1482 | static ptid_t |
1483 | record_wait (struct target_ops *ops, | |
1484 | ptid_t ptid, struct target_waitstatus *status, | |
1485 | int options) | |
1486 | { | |
1487 | ptid_t return_ptid; | |
1488 | ||
1489 | return_ptid = record_wait_1 (ops, ptid, status, options); | |
1490 | if (status->kind != TARGET_WAITKIND_IGNORE) | |
1491 | { | |
1492 | /* We're reporting a stop. Make sure any spurious | |
1493 | target_wait(WNOHANG) doesn't advance the target until the | |
1494 | core wants us resumed again. */ | |
1495 | record_resumed = 0; | |
1496 | } | |
1497 | return return_ptid; | |
1498 | } | |
1499 | ||
9093389c PA |
1500 | static int |
1501 | record_stopped_by_watchpoint (void) | |
1502 | { | |
1503 | if (RECORD_IS_REPLAY) | |
1504 | return record_hw_watchpoint; | |
1505 | else | |
1506 | return record_beneath_to_stopped_by_watchpoint (); | |
1507 | } | |
1508 | ||
1509 | static int | |
1510 | record_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) | |
1511 | { | |
1512 | if (RECORD_IS_REPLAY) | |
1513 | return 0; | |
1514 | else | |
1515 | return record_beneath_to_stopped_data_address (ops, addr_p); | |
1516 | } | |
1517 | ||
6df67667 MS |
1518 | /* "to_disconnect" method for process record target. */ |
1519 | ||
69d05d38 HZ |
1520 | static void |
1521 | record_disconnect (struct target_ops *target, char *args, int from_tty) | |
1522 | { | |
1523 | if (record_debug) | |
1524 | fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n"); | |
1525 | ||
1526 | unpush_target (&record_ops); | |
1527 | target_disconnect (args, from_tty); | |
1528 | } | |
1529 | ||
6df67667 MS |
1530 | /* "to_detach" method for process record target. */ |
1531 | ||
69d05d38 HZ |
1532 | static void |
1533 | record_detach (struct target_ops *ops, char *args, int from_tty) | |
1534 | { | |
1535 | if (record_debug) | |
1536 | fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n"); | |
1537 | ||
1538 | unpush_target (&record_ops); | |
1539 | target_detach (args, from_tty); | |
1540 | } | |
1541 | ||
6df67667 MS |
1542 | /* "to_mourn_inferior" method for process record target. */ |
1543 | ||
69d05d38 HZ |
1544 | static void |
1545 | record_mourn_inferior (struct target_ops *ops) | |
1546 | { | |
1547 | if (record_debug) | |
1548 | fprintf_unfiltered (gdb_stdlog, "Process record: " | |
1549 | "record_mourn_inferior\n"); | |
1550 | ||
1551 | unpush_target (&record_ops); | |
1552 | target_mourn_inferior (); | |
1553 | } | |
1554 | ||
1555 | /* Close process record target before killing the inferior process. */ | |
1556 | ||
1557 | static void | |
1558 | record_kill (struct target_ops *ops) | |
1559 | { | |
1560 | if (record_debug) | |
1561 | fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n"); | |
1562 | ||
1563 | unpush_target (&record_ops); | |
1564 | target_kill (); | |
1565 | } | |
1566 | ||
1567 | /* Record registers change (by user or by GDB) to list as an instruction. */ | |
1568 | ||
1569 | static void | |
1570 | record_registers_change (struct regcache *regcache, int regnum) | |
1571 | { | |
1572 | /* Check record_insn_num. */ | |
1573 | record_check_insn_num (0); | |
1574 | ||
1575 | record_arch_list_head = NULL; | |
1576 | record_arch_list_tail = NULL; | |
1577 | ||
1578 | if (regnum < 0) | |
1579 | { | |
1580 | int i; | |
123f5f96 | 1581 | |
69d05d38 HZ |
1582 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
1583 | { | |
1584 | if (record_arch_list_add_reg (regcache, i)) | |
1585 | { | |
1586 | record_list_release (record_arch_list_tail); | |
1587 | error (_("Process record: failed to record execution log.")); | |
1588 | } | |
1589 | } | |
1590 | } | |
1591 | else | |
1592 | { | |
1593 | if (record_arch_list_add_reg (regcache, regnum)) | |
1594 | { | |
1595 | record_list_release (record_arch_list_tail); | |
1596 | error (_("Process record: failed to record execution log.")); | |
1597 | } | |
1598 | } | |
1599 | if (record_arch_list_add_end ()) | |
1600 | { | |
1601 | record_list_release (record_arch_list_tail); | |
1602 | error (_("Process record: failed to record execution log.")); | |
1603 | } | |
1604 | record_list->next = record_arch_list_head; | |
1605 | record_arch_list_head->prev = record_list; | |
1606 | record_list = record_arch_list_tail; | |
1607 | ||
1608 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1609 | record_list_release_first (); | |
1610 | else | |
1611 | record_insn_num++; | |
1612 | } | |
1613 | ||
6df67667 MS |
1614 | /* "to_store_registers" method for process record target. */ |
1615 | ||
69d05d38 HZ |
1616 | static void |
1617 | record_store_registers (struct target_ops *ops, struct regcache *regcache, | |
1618 | int regno) | |
1619 | { | |
1620 | if (!record_gdb_operation_disable) | |
1621 | { | |
1622 | if (RECORD_IS_REPLAY) | |
1623 | { | |
1624 | int n; | |
69d05d38 HZ |
1625 | |
1626 | /* Let user choose if he wants to write register or not. */ | |
1627 | if (regno < 0) | |
1628 | n = | |
604ad007 JB |
1629 | query (_("Because GDB is in replay mode, changing the " |
1630 | "value of a register will make the execution " | |
1631 | "log unusable from this point onward. " | |
1632 | "Change all registers?")); | |
69d05d38 HZ |
1633 | else |
1634 | n = | |
604ad007 JB |
1635 | query (_("Because GDB is in replay mode, changing the value " |
1636 | "of a register will make the execution log unusable " | |
1637 | "from this point onward. Change register %s?"), | |
69d05d38 HZ |
1638 | gdbarch_register_name (get_regcache_arch (regcache), |
1639 | regno)); | |
1640 | ||
1641 | if (!n) | |
1642 | { | |
1643 | /* Invalidate the value of regcache that was set in function | |
1644 | "regcache_raw_write". */ | |
1645 | if (regno < 0) | |
1646 | { | |
1647 | int i; | |
123f5f96 | 1648 | |
69d05d38 HZ |
1649 | for (i = 0; |
1650 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1651 | i++) | |
1652 | regcache_invalidate (regcache, i); | |
1653 | } | |
1654 | else | |
1655 | regcache_invalidate (regcache, regno); | |
1656 | ||
1657 | error (_("Process record canceled the operation.")); | |
1658 | } | |
1659 | ||
1660 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1661 | record_list_release_following (record_list); |
69d05d38 HZ |
1662 | } |
1663 | ||
1664 | record_registers_change (regcache, regno); | |
1665 | } | |
1666 | record_beneath_to_store_registers (record_beneath_to_store_registers_ops, | |
1667 | regcache, regno); | |
1668 | } | |
1669 | ||
27699eea | 1670 | /* "to_xfer_partial" method. Behavior is conditional on RECORD_IS_REPLAY. |
69d05d38 HZ |
1671 | In replay mode, we cannot write memory unles we are willing to |
1672 | invalidate the record/replay log from this point forward. */ | |
1673 | ||
1674 | static LONGEST | |
1675 | record_xfer_partial (struct target_ops *ops, enum target_object object, | |
1676 | const char *annex, gdb_byte *readbuf, | |
1677 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
1678 | { | |
1679 | if (!record_gdb_operation_disable | |
1680 | && (object == TARGET_OBJECT_MEMORY | |
1681 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1682 | { | |
1683 | if (RECORD_IS_REPLAY) | |
1684 | { | |
1685 | /* Let user choose if he wants to write memory or not. */ | |
604ad007 JB |
1686 | if (!query (_("Because GDB is in replay mode, writing to memory " |
1687 | "will make the execution log unusable from this " | |
1688 | "point onward. Write memory at address %s?"), | |
f5656ead | 1689 | paddress (target_gdbarch (), offset))) |
9a9dc473 | 1690 | error (_("Process record canceled the operation.")); |
69d05d38 HZ |
1691 | |
1692 | /* Destroy the record from here forward. */ | |
61f75dd8 | 1693 | record_list_release_following (record_list); |
69d05d38 HZ |
1694 | } |
1695 | ||
1696 | /* Check record_insn_num */ | |
1697 | record_check_insn_num (0); | |
1698 | ||
1699 | /* Record registers change to list as an instruction. */ | |
1700 | record_arch_list_head = NULL; | |
1701 | record_arch_list_tail = NULL; | |
1702 | if (record_arch_list_add_mem (offset, len)) | |
1703 | { | |
1704 | record_list_release (record_arch_list_tail); | |
1705 | if (record_debug) | |
1706 | fprintf_unfiltered (gdb_stdlog, | |
0156b218 MS |
1707 | "Process record: failed to record " |
1708 | "execution log."); | |
69d05d38 HZ |
1709 | return -1; |
1710 | } | |
1711 | if (record_arch_list_add_end ()) | |
1712 | { | |
1713 | record_list_release (record_arch_list_tail); | |
1714 | if (record_debug) | |
1715 | fprintf_unfiltered (gdb_stdlog, | |
0156b218 MS |
1716 | "Process record: failed to record " |
1717 | "execution log."); | |
69d05d38 HZ |
1718 | return -1; |
1719 | } | |
1720 | record_list->next = record_arch_list_head; | |
1721 | record_arch_list_head->prev = record_list; | |
1722 | record_list = record_arch_list_tail; | |
1723 | ||
1724 | if (record_insn_num == record_insn_max_num && record_insn_max_num) | |
1725 | record_list_release_first (); | |
1726 | else | |
1727 | record_insn_num++; | |
1728 | } | |
1729 | ||
1730 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
1731 | object, annex, readbuf, writebuf, | |
1732 | offset, len); | |
1733 | } | |
1734 | ||
0695b514 PA |
1735 | /* This structure represents a breakpoint inserted while the record |
1736 | target is active. We use this to know when to install/remove | |
1737 | breakpoints in/from the target beneath. For example, a breakpoint | |
1738 | may be inserted while recording, but removed when not replaying nor | |
1739 | recording. In that case, the breakpoint had not been inserted on | |
1740 | the target beneath, so we should not try to remove it there. */ | |
1741 | ||
1742 | struct record_breakpoint | |
1743 | { | |
1744 | /* The address and address space the breakpoint was set at. */ | |
1745 | struct address_space *address_space; | |
1746 | CORE_ADDR addr; | |
1747 | ||
1748 | /* True when the breakpoint has been also installed in the target | |
1749 | beneath. This will be false for breakpoints set during replay or | |
1750 | when recording. */ | |
1751 | int in_target_beneath; | |
1752 | }; | |
1753 | ||
1754 | typedef struct record_breakpoint *record_breakpoint_p; | |
1755 | DEF_VEC_P(record_breakpoint_p); | |
1756 | ||
1757 | /* The list of breakpoints inserted while the record target is | |
1758 | active. */ | |
1759 | VEC(record_breakpoint_p) *record_breakpoints = NULL; | |
1760 | ||
20388dd6 YQ |
1761 | static void |
1762 | record_sync_record_breakpoints (struct bp_location *loc, void *data) | |
1763 | { | |
1764 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1765 | return; | |
1766 | ||
1767 | if (loc->inserted) | |
1768 | { | |
1769 | struct record_breakpoint *bp = XNEW (struct record_breakpoint); | |
1770 | ||
1771 | bp->addr = loc->target_info.placed_address; | |
1772 | bp->address_space = loc->target_info.placed_address_space; | |
1773 | ||
1774 | bp->in_target_beneath = 1; | |
1775 | ||
1776 | VEC_safe_push (record_breakpoint_p, record_breakpoints, bp); | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | /* Sync existing breakpoints to record_breakpoints. */ | |
1781 | ||
1782 | static void | |
1783 | record_init_record_breakpoints (void) | |
1784 | { | |
1785 | VEC_free (record_breakpoint_p, record_breakpoints); | |
1786 | ||
1787 | iterate_over_bp_locations (record_sync_record_breakpoints); | |
1788 | } | |
1789 | ||
0695b514 PA |
1790 | /* Behavior is conditional on RECORD_IS_REPLAY. We will not actually |
1791 | insert or remove breakpoints in the real target when replaying, nor | |
1792 | when recording. */ | |
69d05d38 HZ |
1793 | |
1794 | static int | |
a6d9a66e UW |
1795 | record_insert_breakpoint (struct gdbarch *gdbarch, |
1796 | struct bp_target_info *bp_tgt) | |
69d05d38 | 1797 | { |
0695b514 PA |
1798 | struct record_breakpoint *bp; |
1799 | int in_target_beneath = 0; | |
1800 | ||
69d05d38 HZ |
1801 | if (!RECORD_IS_REPLAY) |
1802 | { | |
0695b514 PA |
1803 | /* When recording, we currently always single-step, so we don't |
1804 | really need to install regular breakpoints in the inferior. | |
1805 | However, we do have to insert software single-step | |
1806 | breakpoints, in case the target can't hardware step. To keep | |
1807 | things single, we always insert. */ | |
1808 | struct cleanup *old_cleanups; | |
1809 | int ret; | |
1810 | ||
1811 | old_cleanups = record_gdb_operation_disable_set (); | |
1812 | ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt); | |
69d05d38 HZ |
1813 | do_cleanups (old_cleanups); |
1814 | ||
0695b514 PA |
1815 | if (ret != 0) |
1816 | return ret; | |
1817 | ||
1818 | in_target_beneath = 1; | |
69d05d38 HZ |
1819 | } |
1820 | ||
0695b514 PA |
1821 | bp = XNEW (struct record_breakpoint); |
1822 | bp->addr = bp_tgt->placed_address; | |
1823 | bp->address_space = bp_tgt->placed_address_space; | |
1824 | bp->in_target_beneath = in_target_beneath; | |
1825 | VEC_safe_push (record_breakpoint_p, record_breakpoints, bp); | |
69d05d38 HZ |
1826 | return 0; |
1827 | } | |
1828 | ||
6df67667 MS |
1829 | /* "to_remove_breakpoint" method for process record target. */ |
1830 | ||
69d05d38 | 1831 | static int |
a6d9a66e UW |
1832 | record_remove_breakpoint (struct gdbarch *gdbarch, |
1833 | struct bp_target_info *bp_tgt) | |
69d05d38 | 1834 | { |
0695b514 PA |
1835 | struct record_breakpoint *bp; |
1836 | int ix; | |
1837 | ||
1838 | for (ix = 0; | |
1839 | VEC_iterate (record_breakpoint_p, record_breakpoints, ix, bp); | |
1840 | ++ix) | |
69d05d38 | 1841 | { |
0695b514 PA |
1842 | if (bp->addr == bp_tgt->placed_address |
1843 | && bp->address_space == bp_tgt->placed_address_space) | |
1844 | { | |
1845 | if (bp->in_target_beneath) | |
1846 | { | |
1847 | struct cleanup *old_cleanups; | |
1848 | int ret; | |
69d05d38 | 1849 | |
0695b514 PA |
1850 | old_cleanups = record_gdb_operation_disable_set (); |
1851 | ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt); | |
1852 | do_cleanups (old_cleanups); | |
69d05d38 | 1853 | |
0695b514 PA |
1854 | if (ret != 0) |
1855 | return ret; | |
1856 | } | |
1857 | ||
1858 | VEC_unordered_remove (record_breakpoint_p, record_breakpoints, ix); | |
1859 | return 0; | |
1860 | } | |
69d05d38 HZ |
1861 | } |
1862 | ||
0695b514 | 1863 | gdb_assert_not_reached ("removing unknown breakpoint"); |
69d05d38 HZ |
1864 | } |
1865 | ||
6df67667 | 1866 | /* "to_can_execute_reverse" method for process record target. */ |
27699eea | 1867 | |
69d05d38 HZ |
1868 | static int |
1869 | record_can_execute_reverse (void) | |
1870 | { | |
1871 | return 1; | |
1872 | } | |
1873 | ||
6b04bdb7 MS |
1874 | /* "to_get_bookmark" method for process record and prec over core. */ |
1875 | ||
1876 | static gdb_byte * | |
1877 | record_get_bookmark (char *args, int from_tty) | |
1878 | { | |
1879 | gdb_byte *ret = NULL; | |
1880 | ||
1881 | /* Return stringified form of instruction count. */ | |
1882 | if (record_list && record_list->type == record_end) | |
1883 | ret = xstrdup (pulongest (record_list->u.end.insn_num)); | |
1884 | ||
1885 | if (record_debug) | |
1886 | { | |
1887 | if (ret) | |
1888 | fprintf_unfiltered (gdb_stdlog, | |
1889 | "record_get_bookmark returns %s\n", ret); | |
1890 | else | |
1891 | fprintf_unfiltered (gdb_stdlog, | |
1892 | "record_get_bookmark returns NULL\n"); | |
1893 | } | |
1894 | return ret; | |
1895 | } | |
1896 | ||
1897 | /* The implementation of the command "record goto". */ | |
1898 | static void cmd_record_goto (char *, int); | |
1899 | ||
1900 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1901 | ||
1902 | static void | |
1903 | record_goto_bookmark (gdb_byte *bookmark, int from_tty) | |
1904 | { | |
1905 | if (record_debug) | |
1906 | fprintf_unfiltered (gdb_stdlog, | |
1907 | "record_goto_bookmark receives %s\n", bookmark); | |
1908 | ||
1909 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1910 | { | |
1911 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) | |
1912 | error (_("Unbalanced quotes: %s"), bookmark); | |
1913 | ||
1914 | /* Strip trailing quote. */ | |
1915 | bookmark[strlen (bookmark) - 1] = '\0'; | |
1916 | /* Strip leading quote. */ | |
1917 | bookmark++; | |
1918 | /* Pass along to cmd_record_goto. */ | |
1919 | } | |
1920 | ||
1921 | cmd_record_goto ((char *) bookmark, from_tty); | |
1922 | return; | |
1923 | } | |
1924 | ||
32231432 PA |
1925 | static void |
1926 | record_async (void (*callback) (enum inferior_event_type event_type, | |
1927 | void *context), void *context) | |
1928 | { | |
32231432 PA |
1929 | /* If we're on top of a line target (e.g., linux-nat, remote), then |
1930 | set it to async mode as well. Will be NULL if we're sitting on | |
1931 | top of the core target, for "record restore". */ | |
1932 | if (record_beneath_to_async != NULL) | |
1933 | record_beneath_to_async (callback, context); | |
1934 | } | |
1935 | ||
32231432 PA |
1936 | static int |
1937 | record_can_async_p (void) | |
1938 | { | |
1939 | /* We only enable async when the user specifically asks for it. */ | |
3dd5b83d | 1940 | return target_async_permitted; |
32231432 PA |
1941 | } |
1942 | ||
1943 | static int | |
1944 | record_is_async_p (void) | |
1945 | { | |
1946 | /* We only enable async when the user specifically asks for it. */ | |
3dd5b83d | 1947 | return target_async_permitted; |
32231432 PA |
1948 | } |
1949 | ||
1950 | static enum exec_direction_kind | |
1951 | record_execution_direction (void) | |
1952 | { | |
1953 | return record_execution_dir; | |
1954 | } | |
1955 | ||
69d05d38 HZ |
1956 | static void |
1957 | init_record_ops (void) | |
1958 | { | |
1959 | record_ops.to_shortname = "record"; | |
1960 | record_ops.to_longname = "Process record and replay target"; | |
1961 | record_ops.to_doc = | |
1962 | "Log program while executing and replay execution from log."; | |
1963 | record_ops.to_open = record_open; | |
1964 | record_ops.to_close = record_close; | |
1965 | record_ops.to_resume = record_resume; | |
1966 | record_ops.to_wait = record_wait; | |
1967 | record_ops.to_disconnect = record_disconnect; | |
1968 | record_ops.to_detach = record_detach; | |
1969 | record_ops.to_mourn_inferior = record_mourn_inferior; | |
1970 | record_ops.to_kill = record_kill; | |
1971 | record_ops.to_create_inferior = find_default_create_inferior; | |
1972 | record_ops.to_store_registers = record_store_registers; | |
1973 | record_ops.to_xfer_partial = record_xfer_partial; | |
1974 | record_ops.to_insert_breakpoint = record_insert_breakpoint; | |
1975 | record_ops.to_remove_breakpoint = record_remove_breakpoint; | |
9093389c | 1976 | record_ops.to_stopped_by_watchpoint = record_stopped_by_watchpoint; |
58ed7dcd | 1977 | record_ops.to_stopped_data_address = record_stopped_data_address; |
69d05d38 HZ |
1978 | record_ops.to_can_execute_reverse = record_can_execute_reverse; |
1979 | record_ops.to_stratum = record_stratum; | |
6b04bdb7 MS |
1980 | /* Add bookmark target methods. */ |
1981 | record_ops.to_get_bookmark = record_get_bookmark; | |
1982 | record_ops.to_goto_bookmark = record_goto_bookmark; | |
32231432 PA |
1983 | record_ops.to_async = record_async; |
1984 | record_ops.to_can_async_p = record_can_async_p; | |
1985 | record_ops.to_is_async_p = record_is_async_p; | |
32231432 | 1986 | record_ops.to_execution_direction = record_execution_direction; |
69d05d38 HZ |
1987 | record_ops.to_magic = OPS_MAGIC; |
1988 | } | |
1989 | ||
27699eea MS |
1990 | /* "to_resume" method for prec over corefile. */ |
1991 | ||
1992 | static void | |
1993 | record_core_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1994 | enum gdb_signal signal) |
27699eea MS |
1995 | { |
1996 | record_resume_step = step; | |
32231432 PA |
1997 | record_resumed = 1; |
1998 | record_execution_dir = execution_direction; | |
1999 | ||
2000 | /* We are about to start executing the inferior (or simulate it), | |
2001 | let's register it with the event loop. */ | |
2002 | if (target_can_async_p ()) | |
2003 | { | |
2004 | target_async (inferior_event_handler, 0); | |
2005 | ||
2006 | /* Notify the event loop there's an event to wait for. */ | |
2007 | mark_async_event_handler (record_async_inferior_event_token); | |
2008 | } | |
27699eea MS |
2009 | } |
2010 | ||
2011 | /* "to_kill" method for prec over corefile. */ | |
2012 | ||
2013 | static void | |
2014 | record_core_kill (struct target_ops *ops) | |
2015 | { | |
2016 | if (record_debug) | |
2017 | fprintf_unfiltered (gdb_stdlog, "Process record: record_core_kill\n"); | |
2018 | ||
2019 | unpush_target (&record_core_ops); | |
2020 | } | |
2021 | ||
2022 | /* "to_fetch_registers" method for prec over corefile. */ | |
2023 | ||
2024 | static void | |
2025 | record_core_fetch_registers (struct target_ops *ops, | |
2026 | struct regcache *regcache, | |
2027 | int regno) | |
2028 | { | |
2029 | if (regno < 0) | |
2030 | { | |
2031 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
2032 | int i; | |
2033 | ||
2034 | for (i = 0; i < num; i ++) | |
2035 | regcache_raw_supply (regcache, i, | |
2036 | record_core_regbuf + MAX_REGISTER_SIZE * i); | |
2037 | } | |
2038 | else | |
2039 | regcache_raw_supply (regcache, regno, | |
2040 | record_core_regbuf + MAX_REGISTER_SIZE * regno); | |
2041 | } | |
2042 | ||
2043 | /* "to_prepare_to_store" method for prec over corefile. */ | |
2044 | ||
2045 | static void | |
2046 | record_core_prepare_to_store (struct regcache *regcache) | |
2047 | { | |
2048 | } | |
2049 | ||
2050 | /* "to_store_registers" method for prec over corefile. */ | |
2051 | ||
2052 | static void | |
2053 | record_core_store_registers (struct target_ops *ops, | |
2054 | struct regcache *regcache, | |
2055 | int regno) | |
2056 | { | |
2057 | if (record_gdb_operation_disable) | |
2058 | regcache_raw_collect (regcache, regno, | |
2059 | record_core_regbuf + MAX_REGISTER_SIZE * regno); | |
2060 | else | |
2061 | error (_("You can't do that without a process to debug.")); | |
2062 | } | |
2063 | ||
2064 | /* "to_xfer_partial" method for prec over corefile. */ | |
2065 | ||
2066 | static LONGEST | |
2067 | record_core_xfer_partial (struct target_ops *ops, enum target_object object, | |
2068 | const char *annex, gdb_byte *readbuf, | |
2069 | const gdb_byte *writebuf, ULONGEST offset, | |
2070 | LONGEST len) | |
2071 | { | |
123f5f96 MS |
2072 | if (object == TARGET_OBJECT_MEMORY) |
2073 | { | |
2074 | if (record_gdb_operation_disable || !writebuf) | |
2075 | { | |
2076 | struct target_section *p; | |
2077 | ||
2078 | for (p = record_core_start; p < record_core_end; p++) | |
2079 | { | |
2080 | if (offset >= p->addr) | |
2081 | { | |
2082 | struct record_core_buf_entry *entry; | |
2083 | ULONGEST sec_offset; | |
2084 | ||
2085 | if (offset >= p->endaddr) | |
2086 | continue; | |
2087 | ||
2088 | if (offset + len > p->endaddr) | |
2089 | len = p->endaddr - offset; | |
2090 | ||
2091 | sec_offset = offset - p->addr; | |
2092 | ||
2093 | /* Read readbuf or write writebuf p, offset, len. */ | |
2094 | /* Check flags. */ | |
2095 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2096 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2097 | { | |
2098 | if (readbuf) | |
2099 | memset (readbuf, 0, len); | |
2100 | return len; | |
2101 | } | |
2102 | /* Get record_core_buf_entry. */ | |
2103 | for (entry = record_core_buf_list; entry; | |
2104 | entry = entry->prev) | |
2105 | if (entry->p == p) | |
2106 | break; | |
2107 | if (writebuf) | |
2108 | { | |
2109 | if (!entry) | |
2110 | { | |
2111 | /* Add a new entry. */ | |
2112 | entry = (struct record_core_buf_entry *) | |
2113 | xmalloc (sizeof (struct record_core_buf_entry)); | |
2114 | entry->p = p; | |
2115 | if (!bfd_malloc_and_get_section (p->bfd, | |
2116 | p->the_bfd_section, | |
2117 | &entry->buf)) | |
2118 | { | |
2119 | xfree (entry); | |
2120 | return 0; | |
2121 | } | |
2122 | entry->prev = record_core_buf_list; | |
2123 | record_core_buf_list = entry; | |
2124 | } | |
2125 | ||
2126 | memcpy (entry->buf + sec_offset, writebuf, | |
2127 | (size_t) len); | |
2128 | } | |
2129 | else | |
2130 | { | |
2131 | if (!entry) | |
2132 | return record_beneath_to_xfer_partial | |
2133 | (record_beneath_to_xfer_partial_ops, | |
2134 | object, annex, readbuf, writebuf, | |
2135 | offset, len); | |
2136 | ||
2137 | memcpy (readbuf, entry->buf + sec_offset, | |
2138 | (size_t) len); | |
2139 | } | |
2140 | ||
2141 | return len; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | return -1; | |
2146 | } | |
2147 | else | |
2148 | error (_("You can't do that without a process to debug.")); | |
2149 | } | |
27699eea MS |
2150 | |
2151 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, | |
2152 | object, annex, readbuf, writebuf, | |
2153 | offset, len); | |
2154 | } | |
2155 | ||
2156 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2157 | ||
2158 | static int | |
2159 | record_core_insert_breakpoint (struct gdbarch *gdbarch, | |
2160 | struct bp_target_info *bp_tgt) | |
2161 | { | |
2162 | return 0; | |
2163 | } | |
2164 | ||
2165 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2166 | ||
2167 | static int | |
2168 | record_core_remove_breakpoint (struct gdbarch *gdbarch, | |
2169 | struct bp_target_info *bp_tgt) | |
2170 | { | |
2171 | return 0; | |
2172 | } | |
2173 | ||
2174 | /* "to_has_execution" method for prec over corefile. */ | |
2175 | ||
aeaec162 TT |
2176 | static int |
2177 | record_core_has_execution (struct target_ops *ops, ptid_t the_ptid) | |
27699eea MS |
2178 | { |
2179 | return 1; | |
2180 | } | |
2181 | ||
2182 | static void | |
2183 | init_record_core_ops (void) | |
2184 | { | |
06280d23 | 2185 | record_core_ops.to_shortname = "record-core"; |
27699eea MS |
2186 | record_core_ops.to_longname = "Process record and replay target"; |
2187 | record_core_ops.to_doc = | |
2188 | "Log program while executing and replay execution from log."; | |
2189 | record_core_ops.to_open = record_open; | |
2190 | record_core_ops.to_close = record_close; | |
2191 | record_core_ops.to_resume = record_core_resume; | |
2192 | record_core_ops.to_wait = record_wait; | |
2193 | record_core_ops.to_kill = record_core_kill; | |
2194 | record_core_ops.to_fetch_registers = record_core_fetch_registers; | |
2195 | record_core_ops.to_prepare_to_store = record_core_prepare_to_store; | |
2196 | record_core_ops.to_store_registers = record_core_store_registers; | |
2197 | record_core_ops.to_xfer_partial = record_core_xfer_partial; | |
2198 | record_core_ops.to_insert_breakpoint = record_core_insert_breakpoint; | |
2199 | record_core_ops.to_remove_breakpoint = record_core_remove_breakpoint; | |
9093389c | 2200 | record_core_ops.to_stopped_by_watchpoint = record_stopped_by_watchpoint; |
58ed7dcd | 2201 | record_core_ops.to_stopped_data_address = record_stopped_data_address; |
27699eea MS |
2202 | record_core_ops.to_can_execute_reverse = record_can_execute_reverse; |
2203 | record_core_ops.to_has_execution = record_core_has_execution; | |
2204 | record_core_ops.to_stratum = record_stratum; | |
6b04bdb7 MS |
2205 | /* Add bookmark target methods. */ |
2206 | record_core_ops.to_get_bookmark = record_get_bookmark; | |
2207 | record_core_ops.to_goto_bookmark = record_goto_bookmark; | |
32231432 PA |
2208 | record_core_ops.to_async = record_async; |
2209 | record_core_ops.to_can_async_p = record_can_async_p; | |
2210 | record_core_ops.to_is_async_p = record_is_async_p; | |
32231432 | 2211 | record_core_ops.to_execution_direction = record_execution_direction; |
27699eea MS |
2212 | record_core_ops.to_magic = OPS_MAGIC; |
2213 | } | |
2214 | ||
6df67667 MS |
2215 | /* Implement "show record debug" command. */ |
2216 | ||
69d05d38 HZ |
2217 | static void |
2218 | show_record_debug (struct ui_file *file, int from_tty, | |
2219 | struct cmd_list_element *c, const char *value) | |
2220 | { | |
2221 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), | |
2222 | value); | |
2223 | } | |
2224 | ||
2225 | /* Alias for "target record". */ | |
2226 | ||
2227 | static void | |
2228 | cmd_record_start (char *args, int from_tty) | |
2229 | { | |
2230 | execute_command ("target record", from_tty); | |
2231 | } | |
2232 | ||
2233 | /* Truncate the record log from the present point | |
2234 | of replay until the end. */ | |
2235 | ||
2236 | static void | |
2237 | cmd_record_delete (char *args, int from_tty) | |
2238 | { | |
2239 | if (current_target.to_stratum == record_stratum) | |
2240 | { | |
2241 | if (RECORD_IS_REPLAY) | |
2242 | { | |
2243 | if (!from_tty || query (_("Delete the log from this point forward " | |
2244 | "and begin to record the running message " | |
2245 | "at current PC?"))) | |
61f75dd8 | 2246 | record_list_release_following (record_list); |
69d05d38 HZ |
2247 | } |
2248 | else | |
2249 | printf_unfiltered (_("Already at end of record list.\n")); | |
2250 | ||
2251 | } | |
2252 | else | |
2253 | printf_unfiltered (_("Process record is not started.\n")); | |
2254 | } | |
2255 | ||
6df67667 | 2256 | /* Implement the "stoprecord" or "record stop" command. */ |
69d05d38 HZ |
2257 | |
2258 | static void | |
2259 | cmd_record_stop (char *args, int from_tty) | |
2260 | { | |
2261 | if (current_target.to_stratum == record_stratum) | |
2262 | { | |
5d40bb85 | 2263 | unpush_target (&record_ops); |
b54295a7 MS |
2264 | printf_unfiltered (_("Process record is stopped and all execution " |
2265 | "logs are deleted.\n")); | |
82a90ccf YQ |
2266 | |
2267 | observer_notify_record_changed (current_inferior (), 0); | |
69d05d38 HZ |
2268 | } |
2269 | else | |
2270 | printf_unfiltered (_("Process record is not started.\n")); | |
2271 | } | |
2272 | ||
2273 | /* Set upper limit of record log size. */ | |
2274 | ||
2275 | static void | |
2276 | set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c) | |
2277 | { | |
2278 | if (record_insn_num > record_insn_max_num && record_insn_max_num) | |
2279 | { | |
265aad34 | 2280 | /* Count down record_insn_num while releasing records from list. */ |
69d05d38 | 2281 | while (record_insn_num > record_insn_max_num) |
265aad34 MS |
2282 | { |
2283 | record_list_release_first (); | |
2284 | record_insn_num--; | |
2285 | } | |
69d05d38 HZ |
2286 | } |
2287 | } | |
2288 | ||
69d05d38 HZ |
2289 | static struct cmd_list_element *record_cmdlist, *set_record_cmdlist, |
2290 | *show_record_cmdlist, *info_record_cmdlist; | |
2291 | ||
2292 | static void | |
2293 | set_record_command (char *args, int from_tty) | |
2294 | { | |
3e43a32a MS |
2295 | printf_unfiltered (_("\"set record\" must be followed " |
2296 | "by an apporpriate subcommand.\n")); | |
69d05d38 HZ |
2297 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); |
2298 | } | |
2299 | ||
2300 | static void | |
2301 | show_record_command (char *args, int from_tty) | |
2302 | { | |
2303 | cmd_show_list (show_record_cmdlist, from_tty, ""); | |
2304 | } | |
2305 | ||
b54295a7 MS |
2306 | /* Display some statistics about the execution log. */ |
2307 | ||
69d05d38 HZ |
2308 | static void |
2309 | info_record_command (char *args, int from_tty) | |
2310 | { | |
b54295a7 MS |
2311 | struct record_entry *p; |
2312 | ||
2313 | if (current_target.to_stratum == record_stratum) | |
2314 | { | |
2315 | if (RECORD_IS_REPLAY) | |
2316 | printf_filtered (_("Replay mode:\n")); | |
2317 | else | |
2318 | printf_filtered (_("Record mode:\n")); | |
2319 | ||
2320 | /* Find entry for first actual instruction in the log. */ | |
2321 | for (p = record_first.next; | |
2322 | p != NULL && p->type != record_end; | |
2323 | p = p->next) | |
2324 | ; | |
2325 | ||
2326 | /* Do we have a log at all? */ | |
2327 | if (p != NULL && p->type == record_end) | |
2328 | { | |
2329 | /* Display instruction number for first instruction in the log. */ | |
2330 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
2331 | pulongest (p->u.end.insn_num)); | |
2332 | ||
2333 | /* If in replay mode, display where we are in the log. */ | |
2334 | if (RECORD_IS_REPLAY) | |
2335 | printf_filtered (_("Current instruction number is %s.\n"), | |
2336 | pulongest (record_list->u.end.insn_num)); | |
2337 | ||
2338 | /* Display instruction number for last instruction in the log. */ | |
2339 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
2340 | pulongest (record_insn_count)); | |
2341 | ||
2342 | /* Display log count. */ | |
2343 | printf_filtered (_("Log contains %d instructions.\n"), | |
2344 | record_insn_num); | |
2345 | } | |
2346 | else | |
2347 | { | |
2348 | printf_filtered (_("No instructions have been logged.\n")); | |
2349 | } | |
2350 | } | |
2351 | else | |
2352 | { | |
2353 | printf_filtered (_("target record is not active.\n")); | |
2354 | } | |
2355 | ||
2356 | /* Display max log size. */ | |
2357 | printf_filtered (_("Max logged instructions is %d.\n"), | |
2358 | record_insn_max_num); | |
69d05d38 HZ |
2359 | } |
2360 | ||
0156b218 MS |
2361 | /* Record log save-file format |
2362 | Version 1 (never released) | |
2363 | ||
2364 | Header: | |
2365 | 4 bytes: magic number htonl(0x20090829). | |
2366 | NOTE: be sure to change whenever this file format changes! | |
2367 | ||
2368 | Records: | |
2369 | record_end: | |
2370 | 1 byte: record type (record_end, see enum record_type). | |
2371 | record_reg: | |
2372 | 1 byte: record type (record_reg, see enum record_type). | |
2373 | 8 bytes: register id (network byte order). | |
2374 | MAX_REGISTER_SIZE bytes: register value. | |
2375 | record_mem: | |
2376 | 1 byte: record type (record_mem, see enum record_type). | |
2377 | 8 bytes: memory length (network byte order). | |
2378 | 8 bytes: memory address (network byte order). | |
2379 | n bytes: memory value (n == memory length). | |
2380 | ||
2381 | Version 2 | |
2382 | 4 bytes: magic number netorder32(0x20091016). | |
2383 | NOTE: be sure to change whenever this file format changes! | |
2384 | ||
2385 | Records: | |
2386 | record_end: | |
2387 | 1 byte: record type (record_end, see enum record_type). | |
2388 | 4 bytes: signal | |
2389 | 4 bytes: instruction count | |
2390 | record_reg: | |
2391 | 1 byte: record type (record_reg, see enum record_type). | |
2392 | 4 bytes: register id (network byte order). | |
2393 | n bytes: register value (n == actual register size). | |
2394 | (eg. 4 bytes for x86 general registers). | |
2395 | record_mem: | |
2396 | 1 byte: record type (record_mem, see enum record_type). | |
2397 | 4 bytes: memory length (network byte order). | |
2398 | 8 bytes: memory address (network byte order). | |
2399 | n bytes: memory value (n == memory length). | |
2400 | ||
2401 | */ | |
2402 | ||
2403 | /* bfdcore_read -- read bytes from a core file section. */ | |
2404 | ||
2405 | static inline void | |
2406 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2407 | { | |
2408 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2409 | ||
2410 | if (ret) | |
2411 | *offset += len; | |
2412 | else | |
4f1cdeec | 2413 | error (_("Failed to read %d bytes from core file %s ('%s')."), |
0156b218 MS |
2414 | len, bfd_get_filename (obfd), |
2415 | bfd_errmsg (bfd_get_error ())); | |
2416 | } | |
2417 | ||
2418 | static inline uint64_t | |
6aa96d03 | 2419 | netorder64 (uint64_t input) |
0156b218 | 2420 | { |
6aa96d03 MS |
2421 | uint64_t ret; |
2422 | ||
2423 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2424 | BFD_ENDIAN_BIG, input); | |
2425 | return ret; | |
0156b218 MS |
2426 | } |
2427 | ||
2428 | static inline uint32_t | |
6aa96d03 | 2429 | netorder32 (uint32_t input) |
0156b218 | 2430 | { |
6aa96d03 MS |
2431 | uint32_t ret; |
2432 | ||
2433 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2434 | BFD_ENDIAN_BIG, input); | |
2435 | return ret; | |
0156b218 MS |
2436 | } |
2437 | ||
2438 | static inline uint16_t | |
6aa96d03 | 2439 | netorder16 (uint16_t input) |
0156b218 | 2440 | { |
6aa96d03 MS |
2441 | uint16_t ret; |
2442 | ||
2443 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2444 | BFD_ENDIAN_BIG, input); | |
2445 | return ret; | |
0156b218 MS |
2446 | } |
2447 | ||
2448 | /* Restore the execution log from a core_bfd file. */ | |
2449 | static void | |
2450 | record_restore (void) | |
2451 | { | |
2452 | uint32_t magic; | |
2453 | struct cleanup *old_cleanups; | |
2454 | struct record_entry *rec; | |
2455 | asection *osec; | |
2456 | uint32_t osec_size; | |
2457 | int bfd_offset = 0; | |
2458 | struct regcache *regcache; | |
2459 | ||
2460 | /* We restore the execution log from the open core bfd, | |
2461 | if there is one. */ | |
2462 | if (core_bfd == NULL) | |
2463 | return; | |
2464 | ||
2465 | /* "record_restore" can only be called when record list is empty. */ | |
2466 | gdb_assert (record_first.next == NULL); | |
2467 | ||
2468 | if (record_debug) | |
07b7cff3 | 2469 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); |
0156b218 MS |
2470 | |
2471 | /* Now need to find our special note section. */ | |
2472 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
0156b218 | 2473 | if (record_debug) |
07b7cff3 PA |
2474 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", |
2475 | osec ? "succeeded" : "failed"); | |
d42de051 MS |
2476 | if (osec == NULL) |
2477 | return; | |
2478 | osec_size = bfd_section_size (core_bfd, osec); | |
0156b218 | 2479 | if (record_debug) |
07b7cff3 | 2480 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); |
0156b218 MS |
2481 | |
2482 | /* Check the magic code. */ | |
2483 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
2484 | if (magic != RECORD_FILE_MAGIC) | |
2485 | error (_("Version mis-match or file format error in core file %s."), | |
2486 | bfd_get_filename (core_bfd)); | |
2487 | if (record_debug) | |
3e43a32a MS |
2488 | fprintf_unfiltered (gdb_stdlog, |
2489 | " Reading 4-byte magic cookie " | |
2490 | "RECORD_FILE_MAGIC (0x%s)\n", | |
07b7cff3 | 2491 | phex_nz (netorder32 (magic), 4)); |
0156b218 MS |
2492 | |
2493 | /* Restore the entries in recfd into record_arch_list_head and | |
2494 | record_arch_list_tail. */ | |
2495 | record_arch_list_head = NULL; | |
2496 | record_arch_list_tail = NULL; | |
2497 | record_insn_num = 0; | |
2498 | old_cleanups = make_cleanup (record_arch_list_cleanups, 0); | |
2499 | regcache = get_current_regcache (); | |
2500 | ||
2501 | while (1) | |
2502 | { | |
ec6dbf37 | 2503 | uint8_t rectype; |
0156b218 MS |
2504 | uint32_t regnum, len, signal, count; |
2505 | uint64_t addr; | |
2506 | ||
2507 | /* We are finished when offset reaches osec_size. */ | |
2508 | if (bfd_offset >= osec_size) | |
2509 | break; | |
ec6dbf37 | 2510 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); |
0156b218 | 2511 | |
ec6dbf37 | 2512 | switch (rectype) |
0156b218 MS |
2513 | { |
2514 | case record_reg: /* reg */ | |
2515 | /* Get register number to regnum. */ | |
2516 | bfdcore_read (core_bfd, osec, ®num, | |
2517 | sizeof (regnum), &bfd_offset); | |
2518 | regnum = netorder32 (regnum); | |
2519 | ||
2520 | rec = record_reg_alloc (regcache, regnum); | |
2521 | ||
2522 | /* Get val. */ | |
2523 | bfdcore_read (core_bfd, osec, record_get_loc (rec), | |
2524 | rec->u.reg.len, &bfd_offset); | |
2525 | ||
07b7cff3 | 2526 | if (record_debug) |
3e43a32a MS |
2527 | fprintf_unfiltered (gdb_stdlog, |
2528 | " Reading register %d (1 " | |
2529 | "plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2530 | rec->u.reg.num, |
2531 | (unsigned long) sizeof (regnum), | |
2532 | rec->u.reg.len); | |
0156b218 MS |
2533 | break; |
2534 | ||
2535 | case record_mem: /* mem */ | |
2536 | /* Get len. */ | |
2537 | bfdcore_read (core_bfd, osec, &len, | |
2538 | sizeof (len), &bfd_offset); | |
2539 | len = netorder32 (len); | |
2540 | ||
2541 | /* Get addr. */ | |
2542 | bfdcore_read (core_bfd, osec, &addr, | |
2543 | sizeof (addr), &bfd_offset); | |
2544 | addr = netorder64 (addr); | |
2545 | ||
2546 | rec = record_mem_alloc (addr, len); | |
2547 | ||
2548 | /* Get val. */ | |
2549 | bfdcore_read (core_bfd, osec, record_get_loc (rec), | |
2550 | rec->u.mem.len, &bfd_offset); | |
2551 | ||
07b7cff3 | 2552 | if (record_debug) |
3e43a32a MS |
2553 | fprintf_unfiltered (gdb_stdlog, |
2554 | " Reading memory %s (1 plus " | |
2555 | "%lu plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2556 | paddress (get_current_arch (), |
2557 | rec->u.mem.addr), | |
2558 | (unsigned long) sizeof (addr), | |
2559 | (unsigned long) sizeof (len), | |
2560 | rec->u.mem.len); | |
0156b218 MS |
2561 | break; |
2562 | ||
2563 | case record_end: /* end */ | |
2564 | rec = record_end_alloc (); | |
2565 | record_insn_num ++; | |
2566 | ||
2567 | /* Get signal value. */ | |
2568 | bfdcore_read (core_bfd, osec, &signal, | |
2569 | sizeof (signal), &bfd_offset); | |
2570 | signal = netorder32 (signal); | |
2571 | rec->u.end.sigval = signal; | |
2572 | ||
2573 | /* Get insn count. */ | |
2574 | bfdcore_read (core_bfd, osec, &count, | |
2575 | sizeof (count), &bfd_offset); | |
2576 | count = netorder32 (count); | |
2577 | rec->u.end.insn_num = count; | |
2578 | record_insn_count = count + 1; | |
07b7cff3 | 2579 | if (record_debug) |
3e43a32a MS |
2580 | fprintf_unfiltered (gdb_stdlog, |
2581 | " Reading record_end (1 + " | |
2582 | "%lu + %lu bytes), offset == %s\n", | |
07b7cff3 PA |
2583 | (unsigned long) sizeof (signal), |
2584 | (unsigned long) sizeof (count), | |
2585 | paddress (get_current_arch (), | |
2586 | bfd_offset)); | |
0156b218 MS |
2587 | break; |
2588 | ||
2589 | default: | |
2590 | error (_("Bad entry type in core file %s."), | |
2591 | bfd_get_filename (core_bfd)); | |
2592 | break; | |
2593 | } | |
2594 | ||
2595 | /* Add rec to record arch list. */ | |
2596 | record_arch_list_add (rec); | |
2597 | } | |
2598 | ||
2599 | discard_cleanups (old_cleanups); | |
2600 | ||
2601 | /* Add record_arch_list_head to the end of record list. */ | |
2602 | record_first.next = record_arch_list_head; | |
2603 | record_arch_list_head->prev = &record_first; | |
2604 | record_arch_list_tail->next = NULL; | |
2605 | record_list = &record_first; | |
2606 | ||
2607 | /* Update record_insn_max_num. */ | |
2608 | if (record_insn_num > record_insn_max_num) | |
2609 | { | |
2610 | record_insn_max_num = record_insn_num; | |
2611 | warning (_("Auto increase record/replay buffer limit to %d."), | |
2612 | record_insn_max_num); | |
2613 | } | |
2614 | ||
2615 | /* Succeeded. */ | |
2616 | printf_filtered (_("Restored records from core file %s.\n"), | |
2617 | bfd_get_filename (core_bfd)); | |
2618 | ||
2619 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
2620 | } | |
2621 | ||
2622 | /* bfdcore_write -- write bytes into a core file section. */ | |
2623 | ||
2624 | static inline void | |
2625 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2626 | { | |
2627 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2628 | ||
2629 | if (ret) | |
2630 | *offset += len; | |
2631 | else | |
b37520b6 | 2632 | error (_("Failed to write %d bytes to core file %s ('%s')."), |
0156b218 MS |
2633 | len, bfd_get_filename (obfd), |
2634 | bfd_errmsg (bfd_get_error ())); | |
2635 | } | |
2636 | ||
2637 | /* Restore the execution log from a file. We use a modified elf | |
2638 | corefile format, with an extra section for our data. */ | |
2639 | ||
2640 | static void | |
2641 | cmd_record_restore (char *args, int from_tty) | |
2642 | { | |
2643 | core_file_command (args, from_tty); | |
2644 | record_open (args, from_tty); | |
2645 | } | |
2646 | ||
2647 | static void | |
2648 | record_save_cleanups (void *data) | |
2649 | { | |
2650 | bfd *obfd = data; | |
2651 | char *pathname = xstrdup (bfd_get_filename (obfd)); | |
123f5f96 | 2652 | |
cbb099e8 | 2653 | gdb_bfd_unref (obfd); |
0156b218 MS |
2654 | unlink (pathname); |
2655 | xfree (pathname); | |
2656 | } | |
2657 | ||
2658 | /* Save the execution log to a file. We use a modified elf corefile | |
2659 | format, with an extra section for our data. */ | |
2660 | ||
2661 | static void | |
2662 | cmd_record_save (char *args, int from_tty) | |
2663 | { | |
2664 | char *recfilename, recfilename_buffer[40]; | |
0156b218 MS |
2665 | struct record_entry *cur_record_list; |
2666 | uint32_t magic; | |
2667 | struct regcache *regcache; | |
2668 | struct gdbarch *gdbarch; | |
2669 | struct cleanup *old_cleanups; | |
2670 | struct cleanup *set_cleanups; | |
2671 | bfd *obfd; | |
2672 | int save_size = 0; | |
2673 | asection *osec = NULL; | |
2674 | int bfd_offset = 0; | |
2675 | ||
2676 | if (strcmp (current_target.to_shortname, "record") != 0) | |
2677 | error (_("This command can only be used with target 'record'.\n" | |
2678 | "Use 'target record' first.\n")); | |
2679 | ||
2680 | if (args && *args) | |
2681 | recfilename = args; | |
2682 | else | |
2683 | { | |
2684 | /* Default recfile name is "gdb_record.PID". */ | |
2685 | snprintf (recfilename_buffer, sizeof (recfilename_buffer), | |
2686 | "gdb_record.%d", PIDGET (inferior_ptid)); | |
2687 | recfilename = recfilename_buffer; | |
2688 | } | |
2689 | ||
2690 | /* Open the save file. */ | |
2691 | if (record_debug) | |
07b7cff3 PA |
2692 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", |
2693 | recfilename); | |
0156b218 MS |
2694 | |
2695 | /* Open the output file. */ | |
2696 | obfd = create_gcore_bfd (recfilename); | |
2697 | old_cleanups = make_cleanup (record_save_cleanups, obfd); | |
2698 | ||
2699 | /* Save the current record entry to "cur_record_list". */ | |
2700 | cur_record_list = record_list; | |
2701 | ||
2702 | /* Get the values of regcache and gdbarch. */ | |
2703 | regcache = get_current_regcache (); | |
2704 | gdbarch = get_regcache_arch (regcache); | |
2705 | ||
2706 | /* Disable the GDB operation record. */ | |
2707 | set_cleanups = record_gdb_operation_disable_set (); | |
2708 | ||
2709 | /* Reverse execute to the begin of record list. */ | |
2710 | while (1) | |
2711 | { | |
2712 | /* Check for beginning and end of log. */ | |
2713 | if (record_list == &record_first) | |
2714 | break; | |
2715 | ||
2716 | record_exec_insn (regcache, gdbarch, record_list); | |
2717 | ||
2718 | if (record_list->prev) | |
2719 | record_list = record_list->prev; | |
2720 | } | |
2721 | ||
2722 | /* Compute the size needed for the extra bfd section. */ | |
2723 | save_size = 4; /* magic cookie */ | |
2724 | for (record_list = record_first.next; record_list; | |
2725 | record_list = record_list->next) | |
2726 | switch (record_list->type) | |
2727 | { | |
2728 | case record_end: | |
2729 | save_size += 1 + 4 + 4; | |
2730 | break; | |
2731 | case record_reg: | |
2732 | save_size += 1 + 4 + record_list->u.reg.len; | |
2733 | break; | |
2734 | case record_mem: | |
2735 | save_size += 1 + 4 + 8 + record_list->u.mem.len; | |
2736 | break; | |
2737 | } | |
2738 | ||
2739 | /* Make the new bfd section. */ | |
2740 | osec = bfd_make_section_anyway_with_flags (obfd, "precord", | |
2741 | SEC_HAS_CONTENTS | |
2742 | | SEC_READONLY); | |
2743 | if (osec == NULL) | |
2744 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2745 | recfilename, | |
2746 | bfd_errmsg (bfd_get_error ())); | |
2747 | bfd_set_section_size (obfd, osec, save_size); | |
2748 | bfd_set_section_vma (obfd, osec, 0); | |
2749 | bfd_set_section_alignment (obfd, osec, 0); | |
2750 | bfd_section_lma (obfd, osec) = 0; | |
2751 | ||
2752 | /* Save corefile state. */ | |
2753 | write_gcore_file (obfd); | |
2754 | ||
2755 | /* Write out the record log. */ | |
2756 | /* Write the magic code. */ | |
2757 | magic = RECORD_FILE_MAGIC; | |
2758 | if (record_debug) | |
3e43a32a MS |
2759 | fprintf_unfiltered (gdb_stdlog, |
2760 | " Writing 4-byte magic cookie " | |
2761 | "RECORD_FILE_MAGIC (0x%s)\n", | |
07b7cff3 | 2762 | phex_nz (magic, 4)); |
0156b218 MS |
2763 | bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset); |
2764 | ||
2765 | /* Save the entries to recfd and forward execute to the end of | |
2766 | record list. */ | |
2767 | record_list = &record_first; | |
2768 | while (1) | |
2769 | { | |
2770 | /* Save entry. */ | |
2771 | if (record_list != &record_first) | |
2772 | { | |
2773 | uint8_t type; | |
2774 | uint32_t regnum, len, signal, count; | |
2775 | uint64_t addr; | |
2776 | ||
2777 | type = record_list->type; | |
2778 | bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset); | |
2779 | ||
2780 | switch (record_list->type) | |
2781 | { | |
2782 | case record_reg: /* reg */ | |
07b7cff3 | 2783 | if (record_debug) |
3e43a32a MS |
2784 | fprintf_unfiltered (gdb_stdlog, |
2785 | " Writing register %d (1 " | |
2786 | "plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2787 | record_list->u.reg.num, |
2788 | (unsigned long) sizeof (regnum), | |
2789 | record_list->u.reg.len); | |
0156b218 MS |
2790 | |
2791 | /* Write regnum. */ | |
2792 | regnum = netorder32 (record_list->u.reg.num); | |
2793 | bfdcore_write (obfd, osec, ®num, | |
2794 | sizeof (regnum), &bfd_offset); | |
2795 | ||
2796 | /* Write regval. */ | |
2797 | bfdcore_write (obfd, osec, record_get_loc (record_list), | |
2798 | record_list->u.reg.len, &bfd_offset); | |
2799 | break; | |
2800 | ||
2801 | case record_mem: /* mem */ | |
2802 | if (record_debug) | |
3e43a32a MS |
2803 | fprintf_unfiltered (gdb_stdlog, |
2804 | " Writing memory %s (1 plus " | |
2805 | "%lu plus %lu plus %d bytes)\n", | |
07b7cff3 PA |
2806 | paddress (gdbarch, |
2807 | record_list->u.mem.addr), | |
2808 | (unsigned long) sizeof (addr), | |
2809 | (unsigned long) sizeof (len), | |
2810 | record_list->u.mem.len); | |
0156b218 MS |
2811 | |
2812 | /* Write memlen. */ | |
2813 | len = netorder32 (record_list->u.mem.len); | |
2814 | bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset); | |
2815 | ||
2816 | /* Write memaddr. */ | |
2817 | addr = netorder64 (record_list->u.mem.addr); | |
2818 | bfdcore_write (obfd, osec, &addr, | |
2819 | sizeof (addr), &bfd_offset); | |
2820 | ||
2821 | /* Write memval. */ | |
2822 | bfdcore_write (obfd, osec, record_get_loc (record_list), | |
2823 | record_list->u.mem.len, &bfd_offset); | |
2824 | break; | |
2825 | ||
2826 | case record_end: | |
07b7cff3 | 2827 | if (record_debug) |
3e43a32a MS |
2828 | fprintf_unfiltered (gdb_stdlog, |
2829 | " Writing record_end (1 + " | |
2830 | "%lu + %lu bytes)\n", | |
07b7cff3 PA |
2831 | (unsigned long) sizeof (signal), |
2832 | (unsigned long) sizeof (count)); | |
0156b218 MS |
2833 | /* Write signal value. */ |
2834 | signal = netorder32 (record_list->u.end.sigval); | |
2835 | bfdcore_write (obfd, osec, &signal, | |
2836 | sizeof (signal), &bfd_offset); | |
2837 | ||
2838 | /* Write insn count. */ | |
2839 | count = netorder32 (record_list->u.end.insn_num); | |
2840 | bfdcore_write (obfd, osec, &count, | |
2841 | sizeof (count), &bfd_offset); | |
2842 | break; | |
2843 | } | |
2844 | } | |
2845 | ||
2846 | /* Execute entry. */ | |
2847 | record_exec_insn (regcache, gdbarch, record_list); | |
2848 | ||
2849 | if (record_list->next) | |
2850 | record_list = record_list->next; | |
2851 | else | |
2852 | break; | |
2853 | } | |
2854 | ||
2855 | /* Reverse execute to cur_record_list. */ | |
2856 | while (1) | |
2857 | { | |
2858 | /* Check for beginning and end of log. */ | |
2859 | if (record_list == cur_record_list) | |
2860 | break; | |
2861 | ||
2862 | record_exec_insn (regcache, gdbarch, record_list); | |
2863 | ||
2864 | if (record_list->prev) | |
2865 | record_list = record_list->prev; | |
2866 | } | |
2867 | ||
2868 | do_cleanups (set_cleanups); | |
cbb099e8 | 2869 | gdb_bfd_unref (obfd); |
0156b218 MS |
2870 | discard_cleanups (old_cleanups); |
2871 | ||
2872 | /* Succeeded. */ | |
2873 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2874 | recfilename); | |
2875 | } | |
2876 | ||
6b04bdb7 MS |
2877 | /* record_goto_insn -- rewind the record log (forward or backward, |
2878 | depending on DIR) to the given entry, changing the program state | |
2879 | correspondingly. */ | |
2880 | ||
2881 | static void | |
2882 | record_goto_insn (struct record_entry *entry, | |
2883 | enum exec_direction_kind dir) | |
2884 | { | |
2885 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); | |
2886 | struct regcache *regcache = get_current_regcache (); | |
2887 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2888 | ||
2889 | /* Assume everything is valid: we will hit the entry, | |
2890 | and we will not hit the end of the recording. */ | |
2891 | ||
2892 | if (dir == EXEC_FORWARD) | |
2893 | record_list = record_list->next; | |
2894 | ||
2895 | do | |
2896 | { | |
2897 | record_exec_insn (regcache, gdbarch, record_list); | |
2898 | if (dir == EXEC_REVERSE) | |
2899 | record_list = record_list->prev; | |
2900 | else | |
2901 | record_list = record_list->next; | |
2902 | } while (record_list != entry); | |
2903 | do_cleanups (set_cleanups); | |
2904 | } | |
2905 | ||
2906 | /* "record goto" command. Argument is an instruction number, | |
2907 | as given by "info record". | |
2908 | ||
2909 | Rewinds the recording (forward or backward) to the given instruction. */ | |
2910 | ||
2911 | static void | |
2912 | cmd_record_goto (char *arg, int from_tty) | |
2913 | { | |
2914 | struct record_entry *p = NULL; | |
2915 | ULONGEST target_insn = 0; | |
2916 | ||
2917 | if (arg == NULL || *arg == '\0') | |
2918 | error (_("Command requires an argument (insn number to go to).")); | |
2919 | ||
2920 | if (strncmp (arg, "start", strlen ("start")) == 0 | |
2921 | || strncmp (arg, "begin", strlen ("begin")) == 0) | |
2922 | { | |
2923 | /* Special case. Find first insn. */ | |
2924 | for (p = &record_first; p != NULL; p = p->next) | |
2925 | if (p->type == record_end) | |
2926 | break; | |
2927 | if (p) | |
2928 | target_insn = p->u.end.insn_num; | |
2929 | } | |
2930 | else if (strncmp (arg, "end", strlen ("end")) == 0) | |
2931 | { | |
2932 | /* Special case. Find last insn. */ | |
2933 | for (p = record_list; p->next != NULL; p = p->next) | |
2934 | ; | |
2935 | for (; p!= NULL; p = p->prev) | |
2936 | if (p->type == record_end) | |
2937 | break; | |
2938 | if (p) | |
2939 | target_insn = p->u.end.insn_num; | |
2940 | } | |
2941 | else | |
2942 | { | |
2943 | /* General case. Find designated insn. */ | |
2944 | target_insn = parse_and_eval_long (arg); | |
2945 | ||
2946 | for (p = &record_first; p != NULL; p = p->next) | |
2947 | if (p->type == record_end && p->u.end.insn_num == target_insn) | |
2948 | break; | |
2949 | } | |
2950 | ||
2951 | if (p == NULL) | |
2952 | error (_("Target insn '%s' not found."), arg); | |
2953 | else if (p == record_list) | |
2954 | error (_("Already at insn '%s'."), arg); | |
2955 | else if (p->u.end.insn_num > record_list->u.end.insn_num) | |
2956 | { | |
2957 | printf_filtered (_("Go forward to insn number %s\n"), | |
2958 | pulongest (target_insn)); | |
2959 | record_goto_insn (p, EXEC_FORWARD); | |
2960 | } | |
2961 | else | |
2962 | { | |
2963 | printf_filtered (_("Go backward to insn number %s\n"), | |
2964 | pulongest (target_insn)); | |
2965 | record_goto_insn (p, EXEC_REVERSE); | |
2966 | } | |
2967 | registers_changed (); | |
2968 | reinit_frame_cache (); | |
2969 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
2970 | } | |
2971 | ||
70221824 PA |
2972 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
2973 | extern initialize_file_ftype _initialize_record; | |
2974 | ||
69d05d38 HZ |
2975 | void |
2976 | _initialize_record (void) | |
2977 | { | |
0156b218 MS |
2978 | struct cmd_list_element *c; |
2979 | ||
69d05d38 HZ |
2980 | /* Init record_first. */ |
2981 | record_first.prev = NULL; | |
2982 | record_first.next = NULL; | |
2983 | record_first.type = record_end; | |
2984 | ||
2985 | init_record_ops (); | |
2986 | add_target (&record_ops); | |
27699eea MS |
2987 | init_record_core_ops (); |
2988 | add_target (&record_core_ops); | |
69d05d38 | 2989 | |
ccce17b0 YQ |
2990 | add_setshow_zuinteger_cmd ("record", no_class, &record_debug, |
2991 | _("Set debugging of record/replay feature."), | |
2992 | _("Show debugging of record/replay feature."), | |
2993 | _("When enabled, debugging output for " | |
2994 | "record/replay feature is displayed."), | |
2995 | NULL, show_record_debug, &setdebuglist, | |
2996 | &showdebuglist); | |
69d05d38 | 2997 | |
0156b218 MS |
2998 | c = add_prefix_cmd ("record", class_obscure, cmd_record_start, |
2999 | _("Abbreviated form of \"target record\" command."), | |
3000 | &record_cmdlist, "record ", 0, &cmdlist); | |
3001 | set_cmd_completer (c, filename_completer); | |
3002 | ||
69d05d38 HZ |
3003 | add_com_alias ("rec", "record", class_obscure, 1); |
3004 | add_prefix_cmd ("record", class_support, set_record_command, | |
3005 | _("Set record options"), &set_record_cmdlist, | |
3006 | "set record ", 0, &setlist); | |
3007 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); | |
3008 | add_prefix_cmd ("record", class_support, show_record_command, | |
3009 | _("Show record options"), &show_record_cmdlist, | |
3010 | "show record ", 0, &showlist); | |
3011 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); | |
3012 | add_prefix_cmd ("record", class_support, info_record_command, | |
3013 | _("Info record options"), &info_record_cmdlist, | |
3014 | "info record ", 0, &infolist); | |
3015 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); | |
3016 | ||
0156b218 MS |
3017 | c = add_cmd ("save", class_obscure, cmd_record_save, |
3018 | _("Save the execution log to a file.\n\ | |
3019 | Argument is optional filename.\n\ | |
3020 | Default filename is 'gdb_record.<process_id>'."), | |
3021 | &record_cmdlist); | |
3022 | set_cmd_completer (c, filename_completer); | |
3023 | ||
3024 | c = add_cmd ("restore", class_obscure, cmd_record_restore, | |
3025 | _("Restore the execution log from a file.\n\ | |
3026 | Argument is filename. File must be created with 'record save'."), | |
3027 | &record_cmdlist); | |
3028 | set_cmd_completer (c, filename_completer); | |
69d05d38 HZ |
3029 | |
3030 | add_cmd ("delete", class_obscure, cmd_record_delete, | |
3031 | _("Delete the rest of execution log and start recording it anew."), | |
3032 | &record_cmdlist); | |
3033 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); | |
3034 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); | |
3035 | ||
3036 | add_cmd ("stop", class_obscure, cmd_record_stop, | |
3037 | _("Stop the record/replay target."), | |
3038 | &record_cmdlist); | |
3039 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); | |
3040 | ||
3041 | /* Record instructions number limit command. */ | |
3042 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
fda458ee | 3043 | &record_stop_at_limit, _("\ |
299a410e | 3044 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
3e43a32a MS |
3045 | Show whether record/replay stops when record/replay buffer becomes full."), |
3046 | _("Default is ON.\n\ | |
299a410e EZ |
3047 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ |
3048 | When OFF, if the record/replay buffer becomes full,\n\ | |
3049 | delete the oldest recorded instruction to make room for each new one."), | |
fda458ee MS |
3050 | NULL, NULL, |
3051 | &set_record_cmdlist, &show_record_cmdlist); | |
191e1813 | 3052 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
69d05d38 HZ |
3053 | &record_insn_max_num, |
3054 | _("Set record/replay buffer limit."), | |
299a410e EZ |
3055 | _("Show record/replay buffer limit."), _("\ |
3056 | Set the maximum number of instructions to be stored in the\n\ | |
3057 | record/replay buffer. Zero means unlimited. Default is 200000."), | |
69d05d38 HZ |
3058 | set_record_insn_max_num, |
3059 | NULL, &set_record_cmdlist, &show_record_cmdlist); | |
6b04bdb7 MS |
3060 | |
3061 | add_cmd ("goto", class_obscure, cmd_record_goto, _("\ | |
3062 | Restore the program to its state at instruction number N.\n\ | |
3063 | Argument is instruction number, as shown by 'info record'."), | |
3064 | &record_cmdlist); | |
bb08c432 HZ |
3065 | |
3066 | add_setshow_boolean_cmd ("memory-query", no_class, | |
3067 | &record_memory_query, _("\ | |
3068 | Set whether query if PREC cannot record memory change of next instruction."), | |
3069 | _("\ | |
3070 | Show whether query if PREC cannot record memory change of next instruction."), | |
3071 | _("\ | |
3072 | Default is OFF.\n\ | |
3073 | When ON, query if PREC cannot record memory change of next instruction."), | |
3074 | NULL, NULL, | |
3075 | &set_record_cmdlist, &show_record_cmdlist); | |
a480d2f6 | 3076 | |
69d05d38 | 3077 | } |