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d02ed0bb MM |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
61baf725 | 3 | Copyright (C) 2013-2017 Free Software Foundation, Inc. |
d02ed0bb MM |
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" | |
d02ed0bb MM |
25 | #include "completer.h" |
26 | #include "arch-utils.h" | |
27 | #include "gdbcore.h" | |
28 | #include "exec.h" | |
29 | #include "record.h" | |
30 | #include "record-full.h" | |
31 | #include "elf-bfd.h" | |
32 | #include "gcore.h" | |
33 | #include "event-loop.h" | |
34 | #include "inf-loop.h" | |
35 | #include "gdb_bfd.h" | |
36 | #include "observer.h" | |
45741a9c | 37 | #include "infrun.h" |
d02ed0bb MM |
38 | |
39 | #include <signal.h> | |
40 | ||
41 | /* This module implements "target record-full", also known as "process | |
42 | record and replay". This target sits on top of a "normal" target | |
43 | (a target that "has execution"), and provides a record and replay | |
44 | functionality, including reverse debugging. | |
45 | ||
46 | Target record has two modes: recording, and replaying. | |
47 | ||
48 | In record mode, we intercept the to_resume and to_wait methods. | |
49 | Whenever gdb resumes the target, we run the target in single step | |
50 | mode, and we build up an execution log in which, for each executed | |
51 | instruction, we record all changes in memory and register state. | |
52 | This is invisible to the user, to whom it just looks like an | |
53 | ordinary debugging session (except for performance degredation). | |
54 | ||
55 | In replay mode, instead of actually letting the inferior run as a | |
56 | process, we simulate its execution by playing back the recorded | |
57 | execution log. For each instruction in the log, we simulate the | |
58 | instruction's side effects by duplicating the changes that it would | |
59 | have made on memory and registers. */ | |
60 | ||
88d1aa9d | 61 | #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000 |
d02ed0bb | 62 | |
88d1aa9d MM |
63 | #define RECORD_FULL_IS_REPLAY \ |
64 | (record_full_list->next || execution_direction == EXEC_REVERSE) | |
d02ed0bb | 65 | |
88d1aa9d | 66 | #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016) |
d02ed0bb MM |
67 | |
68 | /* These are the core structs of the process record functionality. | |
69 | ||
88d1aa9d MM |
70 | A record_full_entry is a record of the value change of a register |
71 | ("record_full_reg") or a part of memory ("record_full_mem"). And each | |
72 | instruction must have a struct record_full_entry ("record_full_end") | |
73 | that indicates that this is the last struct record_full_entry of this | |
d02ed0bb MM |
74 | instruction. |
75 | ||
88d1aa9d MM |
76 | Each struct record_full_entry is linked to "record_full_list" by "prev" |
77 | and "next" pointers. */ | |
d02ed0bb | 78 | |
88d1aa9d | 79 | struct record_full_mem_entry |
d02ed0bb MM |
80 | { |
81 | CORE_ADDR addr; | |
82 | int len; | |
83 | /* Set this flag if target memory for this entry | |
84 | can no longer be accessed. */ | |
85 | int mem_entry_not_accessible; | |
86 | union | |
87 | { | |
88 | gdb_byte *ptr; | |
89 | gdb_byte buf[sizeof (gdb_byte *)]; | |
90 | } u; | |
91 | }; | |
92 | ||
88d1aa9d | 93 | struct record_full_reg_entry |
d02ed0bb MM |
94 | { |
95 | unsigned short num; | |
96 | unsigned short len; | |
97 | union | |
98 | { | |
99 | gdb_byte *ptr; | |
100 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
101 | } u; | |
102 | }; | |
103 | ||
88d1aa9d | 104 | struct record_full_end_entry |
d02ed0bb MM |
105 | { |
106 | enum gdb_signal sigval; | |
107 | ULONGEST insn_num; | |
108 | }; | |
109 | ||
88d1aa9d | 110 | enum record_full_type |
d02ed0bb | 111 | { |
88d1aa9d MM |
112 | record_full_end = 0, |
113 | record_full_reg, | |
114 | record_full_mem | |
d02ed0bb MM |
115 | }; |
116 | ||
117 | /* This is the data structure that makes up the execution log. | |
118 | ||
119 | The execution log consists of a single linked list of entries | |
88d1aa9d | 120 | of type "struct record_full_entry". It is doubly linked so that it |
d02ed0bb MM |
121 | can be traversed in either direction. |
122 | ||
123 | The start of the list is anchored by a struct called | |
88d1aa9d MM |
124 | "record_full_first". The pointer "record_full_list" either points |
125 | to the last entry that was added to the list (in record mode), or to | |
126 | the next entry in the list that will be executed (in replay mode). | |
d02ed0bb | 127 | |
88d1aa9d MM |
128 | Each list element (struct record_full_entry), in addition to next |
129 | and prev pointers, consists of a union of three entry types: mem, | |
130 | reg, and end. A field called "type" determines which entry type is | |
d02ed0bb MM |
131 | represented by a given list element. |
132 | ||
133 | Each instruction that is added to the execution log is represented | |
134 | by a variable number of list elements ('entries'). The instruction | |
135 | will have one "reg" entry for each register that is changed by | |
136 | executing the instruction (including the PC in every case). It | |
137 | will also have one "mem" entry for each memory change. Finally, | |
138 | each instruction will have an "end" entry that separates it from | |
139 | the changes associated with the next instruction. */ | |
140 | ||
88d1aa9d | 141 | struct record_full_entry |
d02ed0bb | 142 | { |
88d1aa9d MM |
143 | struct record_full_entry *prev; |
144 | struct record_full_entry *next; | |
145 | enum record_full_type type; | |
d02ed0bb MM |
146 | union |
147 | { | |
148 | /* reg */ | |
88d1aa9d | 149 | struct record_full_reg_entry reg; |
d02ed0bb | 150 | /* mem */ |
88d1aa9d | 151 | struct record_full_mem_entry mem; |
d02ed0bb | 152 | /* end */ |
88d1aa9d | 153 | struct record_full_end_entry end; |
d02ed0bb MM |
154 | } u; |
155 | }; | |
156 | ||
157 | /* If true, query if PREC cannot record memory | |
158 | change of next instruction. */ | |
25ea693b | 159 | int record_full_memory_query = 0; |
d02ed0bb | 160 | |
88d1aa9d | 161 | struct record_full_core_buf_entry |
d02ed0bb | 162 | { |
88d1aa9d | 163 | struct record_full_core_buf_entry *prev; |
d02ed0bb MM |
164 | struct target_section *p; |
165 | bfd_byte *buf; | |
166 | }; | |
167 | ||
168 | /* Record buf with core target. */ | |
88d1aa9d MM |
169 | static gdb_byte *record_full_core_regbuf = NULL; |
170 | static struct target_section *record_full_core_start; | |
171 | static struct target_section *record_full_core_end; | |
172 | static struct record_full_core_buf_entry *record_full_core_buf_list = NULL; | |
d02ed0bb MM |
173 | |
174 | /* The following variables are used for managing the linked list that | |
175 | represents the execution log. | |
176 | ||
88d1aa9d MM |
177 | record_full_first is the anchor that holds down the beginning of |
178 | the list. | |
d02ed0bb | 179 | |
88d1aa9d | 180 | record_full_list serves two functions: |
d02ed0bb MM |
181 | 1) In record mode, it anchors the end of the list. |
182 | 2) In replay mode, it traverses the list and points to | |
183 | the next instruction that must be emulated. | |
184 | ||
88d1aa9d MM |
185 | record_full_arch_list_head and record_full_arch_list_tail are used |
186 | to manage a separate list, which is used to build up the change | |
187 | elements of the currently executing instruction during record mode. | |
188 | When this instruction has been completely annotated in the "arch | |
189 | list", it will be appended to the main execution log. */ | |
d02ed0bb | 190 | |
88d1aa9d MM |
191 | static struct record_full_entry record_full_first; |
192 | static struct record_full_entry *record_full_list = &record_full_first; | |
193 | static struct record_full_entry *record_full_arch_list_head = NULL; | |
194 | static struct record_full_entry *record_full_arch_list_tail = NULL; | |
d02ed0bb | 195 | |
88d1aa9d MM |
196 | /* 1 ask user. 0 auto delete the last struct record_full_entry. */ |
197 | static int record_full_stop_at_limit = 1; | |
d02ed0bb | 198 | /* Maximum allowed number of insns in execution log. */ |
88d1aa9d MM |
199 | static unsigned int record_full_insn_max_num |
200 | = DEFAULT_RECORD_FULL_INSN_MAX_NUM; | |
d02ed0bb | 201 | /* Actual count of insns presently in execution log. */ |
7ee70bf5 | 202 | static unsigned int record_full_insn_num = 0; |
d02ed0bb MM |
203 | /* Count of insns logged so far (may be larger |
204 | than count of insns presently in execution log). */ | |
88d1aa9d | 205 | static ULONGEST record_full_insn_count; |
d02ed0bb MM |
206 | |
207 | /* The target_ops of process record. */ | |
88d1aa9d MM |
208 | static struct target_ops record_full_ops; |
209 | static struct target_ops record_full_core_ops; | |
d02ed0bb | 210 | |
8213266a PA |
211 | /* See record-full.h. */ |
212 | ||
213 | int | |
214 | record_full_is_used (void) | |
215 | { | |
216 | struct target_ops *t; | |
217 | ||
218 | t = find_record_target (); | |
219 | return (t == &record_full_ops | |
220 | || t == &record_full_core_ops); | |
221 | } | |
222 | ||
223 | ||
d02ed0bb MM |
224 | /* Command lists for "set/show record full". */ |
225 | static struct cmd_list_element *set_record_full_cmdlist; | |
226 | static struct cmd_list_element *show_record_full_cmdlist; | |
227 | ||
228 | /* Command list for "record full". */ | |
229 | static struct cmd_list_element *record_full_cmdlist; | |
230 | ||
88d1aa9d MM |
231 | static void record_full_goto_insn (struct record_full_entry *entry, |
232 | enum exec_direction_kind dir); | |
1390f529 TT |
233 | static void record_full_save (struct target_ops *self, |
234 | const char *recfilename); | |
88d1aa9d MM |
235 | |
236 | /* Alloc and free functions for record_full_reg, record_full_mem, and | |
237 | record_full_end entries. */ | |
238 | ||
239 | /* Alloc a record_full_reg record entry. */ | |
240 | ||
241 | static inline struct record_full_entry * | |
242 | record_full_reg_alloc (struct regcache *regcache, int regnum) | |
243 | { | |
244 | struct record_full_entry *rec; | |
d02ed0bb MM |
245 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
246 | ||
8d749320 | 247 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 248 | rec->type = record_full_reg; |
d02ed0bb MM |
249 | rec->u.reg.num = regnum; |
250 | rec->u.reg.len = register_size (gdbarch, regnum); | |
251 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
252 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
253 | ||
254 | return rec; | |
255 | } | |
256 | ||
88d1aa9d | 257 | /* Free a record_full_reg record entry. */ |
d02ed0bb MM |
258 | |
259 | static inline void | |
88d1aa9d | 260 | record_full_reg_release (struct record_full_entry *rec) |
d02ed0bb | 261 | { |
88d1aa9d | 262 | gdb_assert (rec->type == record_full_reg); |
d02ed0bb MM |
263 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
264 | xfree (rec->u.reg.u.ptr); | |
265 | xfree (rec); | |
266 | } | |
267 | ||
88d1aa9d | 268 | /* Alloc a record_full_mem record entry. */ |
d02ed0bb | 269 | |
88d1aa9d MM |
270 | static inline struct record_full_entry * |
271 | record_full_mem_alloc (CORE_ADDR addr, int len) | |
d02ed0bb | 272 | { |
88d1aa9d | 273 | struct record_full_entry *rec; |
d02ed0bb | 274 | |
8d749320 | 275 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 276 | rec->type = record_full_mem; |
d02ed0bb MM |
277 | rec->u.mem.addr = addr; |
278 | rec->u.mem.len = len; | |
279 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
280 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
281 | ||
282 | return rec; | |
283 | } | |
284 | ||
88d1aa9d | 285 | /* Free a record_full_mem record entry. */ |
d02ed0bb MM |
286 | |
287 | static inline void | |
88d1aa9d | 288 | record_full_mem_release (struct record_full_entry *rec) |
d02ed0bb | 289 | { |
88d1aa9d | 290 | gdb_assert (rec->type == record_full_mem); |
d02ed0bb MM |
291 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
292 | xfree (rec->u.mem.u.ptr); | |
293 | xfree (rec); | |
294 | } | |
295 | ||
88d1aa9d | 296 | /* Alloc a record_full_end record entry. */ |
d02ed0bb | 297 | |
88d1aa9d MM |
298 | static inline struct record_full_entry * |
299 | record_full_end_alloc (void) | |
d02ed0bb | 300 | { |
88d1aa9d | 301 | struct record_full_entry *rec; |
d02ed0bb | 302 | |
8d749320 | 303 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 304 | rec->type = record_full_end; |
d02ed0bb MM |
305 | |
306 | return rec; | |
307 | } | |
308 | ||
88d1aa9d | 309 | /* Free a record_full_end record entry. */ |
d02ed0bb MM |
310 | |
311 | static inline void | |
88d1aa9d | 312 | record_full_end_release (struct record_full_entry *rec) |
d02ed0bb MM |
313 | { |
314 | xfree (rec); | |
315 | } | |
316 | ||
317 | /* Free one record entry, any type. | |
318 | Return entry->type, in case caller wants to know. */ | |
319 | ||
88d1aa9d MM |
320 | static inline enum record_full_type |
321 | record_full_entry_release (struct record_full_entry *rec) | |
d02ed0bb | 322 | { |
88d1aa9d | 323 | enum record_full_type type = rec->type; |
d02ed0bb MM |
324 | |
325 | switch (type) { | |
88d1aa9d MM |
326 | case record_full_reg: |
327 | record_full_reg_release (rec); | |
d02ed0bb | 328 | break; |
88d1aa9d MM |
329 | case record_full_mem: |
330 | record_full_mem_release (rec); | |
d02ed0bb | 331 | break; |
88d1aa9d MM |
332 | case record_full_end: |
333 | record_full_end_release (rec); | |
d02ed0bb MM |
334 | break; |
335 | } | |
336 | return type; | |
337 | } | |
338 | ||
339 | /* Free all record entries in list pointed to by REC. */ | |
340 | ||
341 | static void | |
88d1aa9d | 342 | record_full_list_release (struct record_full_entry *rec) |
d02ed0bb MM |
343 | { |
344 | if (!rec) | |
345 | return; | |
346 | ||
347 | while (rec->next) | |
348 | rec = rec->next; | |
349 | ||
350 | while (rec->prev) | |
351 | { | |
352 | rec = rec->prev; | |
88d1aa9d | 353 | record_full_entry_release (rec->next); |
d02ed0bb MM |
354 | } |
355 | ||
88d1aa9d | 356 | if (rec == &record_full_first) |
d02ed0bb | 357 | { |
88d1aa9d MM |
358 | record_full_insn_num = 0; |
359 | record_full_first.next = NULL; | |
d02ed0bb MM |
360 | } |
361 | else | |
88d1aa9d | 362 | record_full_entry_release (rec); |
d02ed0bb MM |
363 | } |
364 | ||
365 | /* Free all record entries forward of the given list position. */ | |
366 | ||
367 | static void | |
88d1aa9d | 368 | record_full_list_release_following (struct record_full_entry *rec) |
d02ed0bb | 369 | { |
88d1aa9d | 370 | struct record_full_entry *tmp = rec->next; |
d02ed0bb MM |
371 | |
372 | rec->next = NULL; | |
373 | while (tmp) | |
374 | { | |
375 | rec = tmp->next; | |
88d1aa9d | 376 | if (record_full_entry_release (tmp) == record_full_end) |
d02ed0bb | 377 | { |
88d1aa9d MM |
378 | record_full_insn_num--; |
379 | record_full_insn_count--; | |
d02ed0bb MM |
380 | } |
381 | tmp = rec; | |
382 | } | |
383 | } | |
384 | ||
385 | /* Delete the first instruction from the beginning of the log, to make | |
386 | room for adding a new instruction at the end of the log. | |
387 | ||
88d1aa9d | 388 | Note -- this function does not modify record_full_insn_num. */ |
d02ed0bb MM |
389 | |
390 | static void | |
88d1aa9d | 391 | record_full_list_release_first (void) |
d02ed0bb | 392 | { |
88d1aa9d | 393 | struct record_full_entry *tmp; |
d02ed0bb | 394 | |
88d1aa9d | 395 | if (!record_full_first.next) |
d02ed0bb MM |
396 | return; |
397 | ||
88d1aa9d | 398 | /* Loop until a record_full_end. */ |
d02ed0bb MM |
399 | while (1) |
400 | { | |
88d1aa9d MM |
401 | /* Cut record_full_first.next out of the linked list. */ |
402 | tmp = record_full_first.next; | |
403 | record_full_first.next = tmp->next; | |
404 | tmp->next->prev = &record_full_first; | |
d02ed0bb MM |
405 | |
406 | /* tmp is now isolated, and can be deleted. */ | |
88d1aa9d MM |
407 | if (record_full_entry_release (tmp) == record_full_end) |
408 | break; /* End loop at first record_full_end. */ | |
d02ed0bb | 409 | |
88d1aa9d | 410 | if (!record_full_first.next) |
d02ed0bb | 411 | { |
88d1aa9d | 412 | gdb_assert (record_full_insn_num == 1); |
d02ed0bb MM |
413 | break; /* End loop when list is empty. */ |
414 | } | |
415 | } | |
416 | } | |
417 | ||
88d1aa9d | 418 | /* Add a struct record_full_entry to record_full_arch_list. */ |
d02ed0bb MM |
419 | |
420 | static void | |
88d1aa9d | 421 | record_full_arch_list_add (struct record_full_entry *rec) |
d02ed0bb MM |
422 | { |
423 | if (record_debug > 1) | |
424 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 425 | "Process record: record_full_arch_list_add %s.\n", |
d02ed0bb MM |
426 | host_address_to_string (rec)); |
427 | ||
88d1aa9d | 428 | if (record_full_arch_list_tail) |
d02ed0bb | 429 | { |
88d1aa9d MM |
430 | record_full_arch_list_tail->next = rec; |
431 | rec->prev = record_full_arch_list_tail; | |
432 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
433 | } |
434 | else | |
435 | { | |
88d1aa9d MM |
436 | record_full_arch_list_head = rec; |
437 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
438 | } |
439 | } | |
440 | ||
441 | /* Return the value storage location of a record entry. */ | |
442 | static inline gdb_byte * | |
88d1aa9d | 443 | record_full_get_loc (struct record_full_entry *rec) |
d02ed0bb MM |
444 | { |
445 | switch (rec->type) { | |
88d1aa9d | 446 | case record_full_mem: |
d02ed0bb MM |
447 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
448 | return rec->u.mem.u.ptr; | |
449 | else | |
450 | return rec->u.mem.u.buf; | |
88d1aa9d | 451 | case record_full_reg: |
d02ed0bb MM |
452 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
453 | return rec->u.reg.u.ptr; | |
454 | else | |
455 | return rec->u.reg.u.buf; | |
88d1aa9d | 456 | case record_full_end: |
d02ed0bb | 457 | default: |
88d1aa9d | 458 | gdb_assert_not_reached ("unexpected record_full_entry type"); |
d02ed0bb MM |
459 | return NULL; |
460 | } | |
461 | } | |
462 | ||
88d1aa9d | 463 | /* Record the value of a register NUM to record_full_arch_list. */ |
d02ed0bb MM |
464 | |
465 | int | |
25ea693b | 466 | record_full_arch_list_add_reg (struct regcache *regcache, int regnum) |
d02ed0bb | 467 | { |
88d1aa9d | 468 | struct record_full_entry *rec; |
d02ed0bb MM |
469 | |
470 | if (record_debug > 1) | |
471 | fprintf_unfiltered (gdb_stdlog, | |
472 | "Process record: add register num = %d to " | |
473 | "record list.\n", | |
474 | regnum); | |
475 | ||
88d1aa9d | 476 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 477 | |
88d1aa9d | 478 | regcache_raw_read (regcache, regnum, record_full_get_loc (rec)); |
d02ed0bb | 479 | |
88d1aa9d | 480 | record_full_arch_list_add (rec); |
d02ed0bb MM |
481 | |
482 | return 0; | |
483 | } | |
484 | ||
485 | /* Record the value of a region of memory whose address is ADDR and | |
88d1aa9d | 486 | length is LEN to record_full_arch_list. */ |
d02ed0bb MM |
487 | |
488 | int | |
25ea693b | 489 | record_full_arch_list_add_mem (CORE_ADDR addr, int len) |
d02ed0bb | 490 | { |
88d1aa9d | 491 | struct record_full_entry *rec; |
d02ed0bb MM |
492 | |
493 | if (record_debug > 1) | |
494 | fprintf_unfiltered (gdb_stdlog, | |
495 | "Process record: add mem addr = %s len = %d to " | |
496 | "record list.\n", | |
497 | paddress (target_gdbarch (), addr), len); | |
498 | ||
499 | if (!addr) /* FIXME: Why? Some arch must permit it... */ | |
500 | return 0; | |
501 | ||
88d1aa9d | 502 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb | 503 | |
88d1aa9d MM |
504 | if (record_read_memory (target_gdbarch (), addr, |
505 | record_full_get_loc (rec), len)) | |
d02ed0bb | 506 | { |
88d1aa9d | 507 | record_full_mem_release (rec); |
d02ed0bb MM |
508 | return -1; |
509 | } | |
510 | ||
88d1aa9d | 511 | record_full_arch_list_add (rec); |
d02ed0bb MM |
512 | |
513 | return 0; | |
514 | } | |
515 | ||
88d1aa9d MM |
516 | /* Add a record_full_end type struct record_full_entry to |
517 | record_full_arch_list. */ | |
d02ed0bb MM |
518 | |
519 | int | |
25ea693b | 520 | record_full_arch_list_add_end (void) |
d02ed0bb | 521 | { |
88d1aa9d | 522 | struct record_full_entry *rec; |
d02ed0bb MM |
523 | |
524 | if (record_debug > 1) | |
525 | fprintf_unfiltered (gdb_stdlog, | |
526 | "Process record: add end to arch list.\n"); | |
527 | ||
88d1aa9d | 528 | rec = record_full_end_alloc (); |
d02ed0bb | 529 | rec->u.end.sigval = GDB_SIGNAL_0; |
88d1aa9d | 530 | rec->u.end.insn_num = ++record_full_insn_count; |
d02ed0bb | 531 | |
88d1aa9d | 532 | record_full_arch_list_add (rec); |
d02ed0bb MM |
533 | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static void | |
651ce16a | 538 | record_full_check_insn_num (void) |
d02ed0bb | 539 | { |
7ee70bf5 | 540 | if (record_full_insn_num == record_full_insn_max_num) |
d02ed0bb | 541 | { |
7ee70bf5 PA |
542 | /* Ask user what to do. */ |
543 | if (record_full_stop_at_limit) | |
d02ed0bb | 544 | { |
651ce16a | 545 | if (!yquery (_("Do you want to auto delete previous execution " |
7ee70bf5 | 546 | "log entries when record/replay buffer becomes " |
651ce16a | 547 | "full (record full stop-at-limit)?"))) |
7ee70bf5 | 548 | error (_("Process record: stopped by user.")); |
651ce16a | 549 | record_full_stop_at_limit = 0; |
d02ed0bb MM |
550 | } |
551 | } | |
552 | } | |
553 | ||
554 | static void | |
88d1aa9d | 555 | record_full_arch_list_cleanups (void *ignore) |
d02ed0bb | 556 | { |
88d1aa9d | 557 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
558 | } |
559 | ||
560 | /* Before inferior step (when GDB record the running message, inferior | |
561 | only can step), GDB will call this function to record the values to | |
88d1aa9d | 562 | record_full_list. This function will call gdbarch_process_record to |
d02ed0bb | 563 | record the running message of inferior and set them to |
88d1aa9d | 564 | record_full_arch_list, and add it to record_full_list. */ |
d02ed0bb MM |
565 | |
566 | static int | |
88d1aa9d | 567 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
568 | { |
569 | int ret; | |
570 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
88d1aa9d MM |
571 | struct cleanup *old_cleanups |
572 | = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb | 573 | |
88d1aa9d MM |
574 | record_full_arch_list_head = NULL; |
575 | record_full_arch_list_tail = NULL; | |
d02ed0bb | 576 | |
88d1aa9d | 577 | /* Check record_full_insn_num. */ |
651ce16a | 578 | record_full_check_insn_num (); |
d02ed0bb MM |
579 | |
580 | /* If gdb sends a signal value to target_resume, | |
581 | save it in the 'end' field of the previous instruction. | |
582 | ||
583 | Maybe process record should record what really happened, | |
584 | rather than what gdb pretends has happened. | |
585 | ||
586 | So if Linux delivered the signal to the child process during | |
587 | the record mode, we will record it and deliver it again in | |
588 | the replay mode. | |
589 | ||
590 | If user says "ignore this signal" during the record mode, then | |
591 | it will be ignored again during the replay mode (no matter if | |
592 | the user says something different, like "deliver this signal" | |
593 | during the replay mode). | |
594 | ||
595 | User should understand that nothing he does during the replay | |
596 | mode will change the behavior of the child. If he tries, | |
597 | then that is a user error. | |
598 | ||
599 | But we should still deliver the signal to gdb during the replay, | |
600 | if we delivered it during the recording. Therefore we should | |
88d1aa9d MM |
601 | record the signal during record_full_wait, not |
602 | record_full_resume. */ | |
603 | if (record_full_list != &record_full_first) /* FIXME better way to check */ | |
d02ed0bb | 604 | { |
88d1aa9d MM |
605 | gdb_assert (record_full_list->type == record_full_end); |
606 | record_full_list->u.end.sigval = signal; | |
d02ed0bb MM |
607 | } |
608 | ||
609 | if (signal == GDB_SIGNAL_0 | |
610 | || !gdbarch_process_record_signal_p (gdbarch)) | |
611 | ret = gdbarch_process_record (gdbarch, | |
612 | regcache, | |
613 | regcache_read_pc (regcache)); | |
614 | else | |
615 | ret = gdbarch_process_record_signal (gdbarch, | |
616 | regcache, | |
617 | signal); | |
618 | ||
619 | if (ret > 0) | |
620 | error (_("Process record: inferior program stopped.")); | |
621 | if (ret < 0) | |
622 | error (_("Process record: failed to record execution log.")); | |
623 | ||
624 | discard_cleanups (old_cleanups); | |
625 | ||
88d1aa9d MM |
626 | record_full_list->next = record_full_arch_list_head; |
627 | record_full_arch_list_head->prev = record_full_list; | |
628 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 629 | |
7ee70bf5 | 630 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 631 | record_full_list_release_first (); |
d02ed0bb | 632 | else |
88d1aa9d | 633 | record_full_insn_num++; |
d02ed0bb MM |
634 | |
635 | return 1; | |
636 | } | |
637 | ||
88d1aa9d | 638 | struct record_full_message_args { |
d02ed0bb MM |
639 | struct regcache *regcache; |
640 | enum gdb_signal signal; | |
641 | }; | |
642 | ||
643 | static int | |
88d1aa9d | 644 | record_full_message_wrapper (void *args) |
d02ed0bb | 645 | { |
19ba03f4 SM |
646 | struct record_full_message_args *record_full_args |
647 | = (struct record_full_message_args *) args; | |
d02ed0bb | 648 | |
88d1aa9d MM |
649 | return record_full_message (record_full_args->regcache, |
650 | record_full_args->signal); | |
d02ed0bb MM |
651 | } |
652 | ||
653 | static int | |
88d1aa9d MM |
654 | record_full_message_wrapper_safe (struct regcache *regcache, |
655 | enum gdb_signal signal) | |
d02ed0bb | 656 | { |
88d1aa9d | 657 | struct record_full_message_args args; |
d02ed0bb MM |
658 | |
659 | args.regcache = regcache; | |
660 | args.signal = signal; | |
661 | ||
7cc53fba | 662 | return catch_errors (record_full_message_wrapper, &args, "", |
88d1aa9d | 663 | RETURN_MASK_ALL); |
d02ed0bb MM |
664 | } |
665 | ||
88d1aa9d | 666 | /* Set to 1 if record_full_store_registers and record_full_xfer_partial |
d02ed0bb MM |
667 | doesn't need record. */ |
668 | ||
88d1aa9d | 669 | static int record_full_gdb_operation_disable = 0; |
d02ed0bb MM |
670 | |
671 | struct cleanup * | |
25ea693b | 672 | record_full_gdb_operation_disable_set (void) |
d02ed0bb MM |
673 | { |
674 | struct cleanup *old_cleanups = NULL; | |
675 | ||
676 | old_cleanups = | |
88d1aa9d MM |
677 | make_cleanup_restore_integer (&record_full_gdb_operation_disable); |
678 | record_full_gdb_operation_disable = 1; | |
d02ed0bb MM |
679 | |
680 | return old_cleanups; | |
681 | } | |
682 | ||
683 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ | |
9e8915c6 PA |
684 | static enum target_stop_reason record_full_stop_reason |
685 | = TARGET_STOPPED_BY_NO_REASON; | |
d02ed0bb MM |
686 | |
687 | /* Execute one instruction from the record log. Each instruction in | |
688 | the log will be represented by an arbitrary sequence of register | |
689 | entries and memory entries, followed by an 'end' entry. */ | |
690 | ||
691 | static inline void | |
88d1aa9d MM |
692 | record_full_exec_insn (struct regcache *regcache, |
693 | struct gdbarch *gdbarch, | |
694 | struct record_full_entry *entry) | |
d02ed0bb MM |
695 | { |
696 | switch (entry->type) | |
697 | { | |
88d1aa9d | 698 | case record_full_reg: /* reg */ |
d02ed0bb MM |
699 | { |
700 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
701 | ||
702 | if (record_debug > 1) | |
703 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 704 | "Process record: record_full_reg %s to " |
d02ed0bb MM |
705 | "inferior num = %d.\n", |
706 | host_address_to_string (entry), | |
707 | entry->u.reg.num); | |
708 | ||
709 | regcache_cooked_read (regcache, entry->u.reg.num, reg); | |
710 | regcache_cooked_write (regcache, entry->u.reg.num, | |
88d1aa9d MM |
711 | record_full_get_loc (entry)); |
712 | memcpy (record_full_get_loc (entry), reg, entry->u.reg.len); | |
d02ed0bb MM |
713 | } |
714 | break; | |
715 | ||
88d1aa9d | 716 | case record_full_mem: /* mem */ |
d02ed0bb MM |
717 | { |
718 | /* Nothing to do if the entry is flagged not_accessible. */ | |
719 | if (!entry->u.mem.mem_entry_not_accessible) | |
720 | { | |
394816ee MK |
721 | gdb_byte *mem = (gdb_byte *) xmalloc (entry->u.mem.len); |
722 | struct cleanup *cleanup = make_cleanup (xfree, mem); | |
d02ed0bb MM |
723 | |
724 | if (record_debug > 1) | |
725 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 726 | "Process record: record_full_mem %s to " |
d02ed0bb MM |
727 | "inferior addr = %s len = %d.\n", |
728 | host_address_to_string (entry), | |
729 | paddress (gdbarch, entry->u.mem.addr), | |
730 | entry->u.mem.len); | |
731 | ||
732 | if (record_read_memory (gdbarch, | |
733 | entry->u.mem.addr, mem, entry->u.mem.len)) | |
734 | entry->u.mem.mem_entry_not_accessible = 1; | |
735 | else | |
736 | { | |
737 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 738 | record_full_get_loc (entry), |
d02ed0bb MM |
739 | entry->u.mem.len)) |
740 | { | |
741 | entry->u.mem.mem_entry_not_accessible = 1; | |
742 | if (record_debug) | |
743 | warning (_("Process record: error writing memory at " | |
744 | "addr = %s len = %d."), | |
745 | paddress (gdbarch, entry->u.mem.addr), | |
746 | entry->u.mem.len); | |
747 | } | |
748 | else | |
749 | { | |
88d1aa9d MM |
750 | memcpy (record_full_get_loc (entry), mem, |
751 | entry->u.mem.len); | |
d02ed0bb MM |
752 | |
753 | /* We've changed memory --- check if a hardware | |
754 | watchpoint should trap. Note that this | |
755 | presently assumes the target beneath supports | |
756 | continuable watchpoints. On non-continuable | |
757 | watchpoints target, we'll want to check this | |
758 | _before_ actually doing the memory change, and | |
759 | not doing the change at all if the watchpoint | |
760 | traps. */ | |
761 | if (hardware_watchpoint_inserted_in_range | |
762 | (get_regcache_aspace (regcache), | |
763 | entry->u.mem.addr, entry->u.mem.len)) | |
9e8915c6 | 764 | record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb MM |
765 | } |
766 | } | |
394816ee MK |
767 | |
768 | do_cleanups (cleanup); | |
d02ed0bb MM |
769 | } |
770 | } | |
771 | break; | |
772 | } | |
773 | } | |
774 | ||
88d1aa9d | 775 | static void record_full_restore (void); |
d02ed0bb MM |
776 | |
777 | /* Asynchronous signal handle registered as event loop source for when | |
778 | we have pending events ready to be passed to the core. */ | |
779 | ||
88d1aa9d | 780 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
781 | |
782 | static void | |
88d1aa9d | 783 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb MM |
784 | { |
785 | inferior_event_handler (INF_REG_EVENT, NULL); | |
786 | } | |
787 | ||
788 | /* Open the process record target. */ | |
789 | ||
790 | static void | |
014f9477 | 791 | record_full_core_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
792 | { |
793 | struct regcache *regcache = get_current_regcache (); | |
794 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
795 | int i; | |
796 | ||
88d1aa9d | 797 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 798 | target_fetch_registers (regcache, -1); |
224c3ddb | 799 | record_full_core_regbuf = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE * regnum); |
d02ed0bb MM |
800 | for (i = 0; i < regnum; i ++) |
801 | regcache_raw_collect (regcache, i, | |
88d1aa9d | 802 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb | 803 | |
88d1aa9d MM |
804 | /* Get record_full_core_start and record_full_core_end. */ |
805 | if (build_section_table (core_bfd, &record_full_core_start, | |
806 | &record_full_core_end)) | |
d02ed0bb | 807 | { |
88d1aa9d MM |
808 | xfree (record_full_core_regbuf); |
809 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
810 | error (_("\"%s\": Can't find sections: %s"), |
811 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
812 | } | |
813 | ||
88d1aa9d MM |
814 | push_target (&record_full_core_ops); |
815 | record_full_restore (); | |
d02ed0bb MM |
816 | } |
817 | ||
818 | /* "to_open" target method for 'live' processes. */ | |
819 | ||
820 | static void | |
014f9477 | 821 | record_full_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
822 | { |
823 | if (record_debug) | |
0a0640e3 | 824 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open_1\n"); |
d02ed0bb MM |
825 | |
826 | /* check exec */ | |
827 | if (!target_has_execution) | |
828 | error (_("Process record: the program is not being run.")); | |
829 | if (non_stop) | |
830 | error (_("Process record target can't debug inferior in non-stop mode " | |
831 | "(non-stop).")); | |
832 | ||
833 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
834 | error (_("Process record: the current architecture doesn't support " | |
835 | "record function.")); | |
836 | ||
88d1aa9d | 837 | push_target (&record_full_ops); |
d02ed0bb MM |
838 | } |
839 | ||
88d1aa9d | 840 | static void record_full_init_record_breakpoints (void); |
d02ed0bb MM |
841 | |
842 | /* "to_open" target method. Open the process record target. */ | |
843 | ||
844 | static void | |
014f9477 | 845 | record_full_open (const char *name, int from_tty) |
d02ed0bb MM |
846 | { |
847 | struct target_ops *t; | |
848 | ||
849 | if (record_debug) | |
88d1aa9d | 850 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 851 | |
8213266a | 852 | record_preopen (); |
d02ed0bb | 853 | |
d02ed0bb | 854 | /* Reset */ |
88d1aa9d MM |
855 | record_full_insn_num = 0; |
856 | record_full_insn_count = 0; | |
857 | record_full_list = &record_full_first; | |
858 | record_full_list->next = NULL; | |
d02ed0bb | 859 | |
d02ed0bb | 860 | if (core_bfd) |
88d1aa9d | 861 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 862 | else |
88d1aa9d | 863 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
864 | |
865 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
866 | record_full_async_inferior_event_token |
867 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
d02ed0bb MM |
868 | NULL); |
869 | ||
88d1aa9d | 870 | record_full_init_record_breakpoints (); |
d02ed0bb | 871 | |
38b022b4 | 872 | observer_notify_record_changed (current_inferior (), 1, "full", NULL); |
d02ed0bb MM |
873 | } |
874 | ||
875 | /* "to_close" target method. Close the process record target. */ | |
876 | ||
877 | static void | |
de90e03d | 878 | record_full_close (struct target_ops *self) |
d02ed0bb | 879 | { |
88d1aa9d | 880 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
881 | |
882 | if (record_debug) | |
88d1aa9d | 883 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 884 | |
88d1aa9d | 885 | record_full_list_release (record_full_list); |
d02ed0bb | 886 | |
88d1aa9d MM |
887 | /* Release record_full_core_regbuf. */ |
888 | if (record_full_core_regbuf) | |
d02ed0bb | 889 | { |
88d1aa9d MM |
890 | xfree (record_full_core_regbuf); |
891 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
892 | } |
893 | ||
88d1aa9d MM |
894 | /* Release record_full_core_buf_list. */ |
895 | if (record_full_core_buf_list) | |
d02ed0bb | 896 | { |
88d1aa9d MM |
897 | for (entry = record_full_core_buf_list->prev; entry; |
898 | entry = entry->prev) | |
d02ed0bb | 899 | { |
88d1aa9d MM |
900 | xfree (record_full_core_buf_list); |
901 | record_full_core_buf_list = entry; | |
d02ed0bb | 902 | } |
88d1aa9d | 903 | record_full_core_buf_list = NULL; |
d02ed0bb MM |
904 | } |
905 | ||
88d1aa9d MM |
906 | if (record_full_async_inferior_event_token) |
907 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
908 | } |
909 | ||
b7d2e916 PA |
910 | /* "to_async" target method. */ |
911 | ||
912 | static void | |
6a3753b3 | 913 | record_full_async (struct target_ops *ops, int enable) |
b7d2e916 | 914 | { |
6a3753b3 | 915 | if (enable) |
b7d2e916 PA |
916 | mark_async_event_handler (record_full_async_inferior_event_token); |
917 | else | |
918 | clear_async_event_handler (record_full_async_inferior_event_token); | |
919 | ||
6a3753b3 | 920 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
921 | } |
922 | ||
88d1aa9d | 923 | static int record_full_resume_step = 0; |
d02ed0bb | 924 | |
88d1aa9d MM |
925 | /* True if we've been resumed, and so each record_full_wait call should |
926 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 927 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 928 | static int record_full_resumed = 0; |
d02ed0bb MM |
929 | |
930 | /* The execution direction of the last resume we got. This is | |
931 | necessary for async mode. Vis (order is not strictly accurate): | |
932 | ||
933 | 1. user has the global execution direction set to forward | |
934 | 2. user does a reverse-step command | |
88d1aa9d | 935 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
936 | temporarily switched to reverse |
937 | 4. GDB's execution direction is reverted back to forward | |
938 | 5. target record notifies event loop there's an event to handle | |
939 | 6. infrun asks the target which direction was it going, and switches | |
940 | the global execution direction accordingly (to reverse) | |
941 | 7. infrun polls an event out of the record target, and handles it | |
942 | 8. GDB goes back to the event loop, and goto #4. | |
943 | */ | |
88d1aa9d | 944 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb MM |
945 | |
946 | /* "to_resume" target method. Resume the process record target. */ | |
947 | ||
948 | static void | |
88d1aa9d MM |
949 | record_full_resume (struct target_ops *ops, ptid_t ptid, int step, |
950 | enum gdb_signal signal) | |
d02ed0bb | 951 | { |
88d1aa9d MM |
952 | record_full_resume_step = step; |
953 | record_full_resumed = 1; | |
954 | record_full_execution_dir = execution_direction; | |
d02ed0bb | 955 | |
88d1aa9d | 956 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
957 | { |
958 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
959 | ||
88d1aa9d | 960 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
961 | |
962 | if (!step) | |
963 | { | |
964 | /* This is not hard single step. */ | |
965 | if (!gdbarch_software_single_step_p (gdbarch)) | |
966 | { | |
967 | /* This is a normal continue. */ | |
968 | step = 1; | |
969 | } | |
970 | else | |
971 | { | |
8ce9efb0 | 972 | /* This arch supports soft single step. */ |
34b7e8a6 | 973 | if (thread_has_single_step_breakpoints_set (inferior_thread ())) |
d02ed0bb MM |
974 | { |
975 | /* This is a soft single step. */ | |
88d1aa9d | 976 | record_full_resume_step = 1; |
d02ed0bb MM |
977 | } |
978 | else | |
93f9a11f | 979 | step = !insert_single_step_breakpoints (gdbarch); |
d02ed0bb MM |
980 | } |
981 | } | |
982 | ||
983 | /* Make sure the target beneath reports all signals. */ | |
984 | target_pass_signals (0, NULL); | |
985 | ||
6b84065d | 986 | ops->beneath->to_resume (ops->beneath, ptid, step, signal); |
d02ed0bb MM |
987 | } |
988 | ||
989 | /* We are about to start executing the inferior (or simulate it), | |
990 | let's register it with the event loop. */ | |
991 | if (target_can_async_p ()) | |
6a3753b3 | 992 | target_async (1); |
d02ed0bb MM |
993 | } |
994 | ||
85ad3aaf PA |
995 | /* "to_commit_resume" method for process record target. */ |
996 | ||
997 | static void | |
998 | record_full_commit_resume (struct target_ops *ops) | |
999 | { | |
1000 | if (!RECORD_FULL_IS_REPLAY) | |
1001 | ops->beneath->to_commit_resume (ops->beneath); | |
1002 | } | |
1003 | ||
88d1aa9d | 1004 | static int record_full_get_sig = 0; |
d02ed0bb MM |
1005 | |
1006 | /* SIGINT signal handler, registered by "to_wait" method. */ | |
1007 | ||
1008 | static void | |
88d1aa9d | 1009 | record_full_sig_handler (int signo) |
d02ed0bb MM |
1010 | { |
1011 | if (record_debug) | |
1012 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1013 | ||
1014 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 1015 | record_full_resume_step = 1; |
d02ed0bb | 1016 | |
88d1aa9d | 1017 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1018 | SIGINT. */ |
88d1aa9d | 1019 | record_full_get_sig = 1; |
d02ed0bb MM |
1020 | } |
1021 | ||
1022 | static void | |
88d1aa9d | 1023 | record_full_wait_cleanups (void *ignore) |
d02ed0bb MM |
1024 | { |
1025 | if (execution_direction == EXEC_REVERSE) | |
1026 | { | |
88d1aa9d MM |
1027 | if (record_full_list->next) |
1028 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1029 | } |
1030 | else | |
88d1aa9d | 1031 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
1032 | } |
1033 | ||
1034 | /* "to_wait" target method for process record target. | |
1035 | ||
1036 | In record mode, the target is always run in singlestep mode | |
1037 | (even when gdb says to continue). The to_wait method intercepts | |
1038 | the stop events and determines which ones are to be passed on to | |
1039 | gdb. Most stop events are just singlestep events that gdb is not | |
1040 | to know about, so the to_wait method just records them and keeps | |
1041 | singlestepping. | |
1042 | ||
1043 | In replay mode, this function emulates the recorded execution log, | |
1044 | one instruction at a time (forward or backward), and determines | |
1045 | where to stop. */ | |
1046 | ||
1047 | static ptid_t | |
88d1aa9d MM |
1048 | record_full_wait_1 (struct target_ops *ops, |
1049 | ptid_t ptid, struct target_waitstatus *status, | |
1050 | int options) | |
d02ed0bb | 1051 | { |
25ea693b | 1052 | struct cleanup *set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
1053 | |
1054 | if (record_debug) | |
1055 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1056 | "Process record: record_full_wait " |
1057 | "record_full_resume_step = %d, " | |
1058 | "record_full_resumed = %d, direction=%s\n", | |
1059 | record_full_resume_step, record_full_resumed, | |
1060 | record_full_execution_dir == EXEC_FORWARD | |
1061 | ? "forward" : "reverse"); | |
1062 | ||
1063 | if (!record_full_resumed) | |
d02ed0bb MM |
1064 | { |
1065 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1066 | ||
1067 | /* No interesting event. */ | |
1068 | status->kind = TARGET_WAITKIND_IGNORE; | |
1069 | return minus_one_ptid; | |
1070 | } | |
1071 | ||
88d1aa9d MM |
1072 | record_full_get_sig = 0; |
1073 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1074 | |
9e8915c6 PA |
1075 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1076 | ||
88d1aa9d | 1077 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1078 | { |
88d1aa9d | 1079 | if (record_full_resume_step) |
d02ed0bb MM |
1080 | { |
1081 | /* This is a single step. */ | |
6b84065d | 1082 | return ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1083 | } |
1084 | else | |
1085 | { | |
1086 | /* This is not a single step. */ | |
1087 | ptid_t ret; | |
1088 | CORE_ADDR tmp_pc; | |
1089 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); | |
1090 | ||
1091 | while (1) | |
1092 | { | |
34b7e8a6 PA |
1093 | struct thread_info *tp; |
1094 | ||
6b84065d | 1095 | ret = ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1096 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1097 | { | |
1098 | if (record_debug) | |
1099 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1100 | "Process record: record_full_wait " |
d02ed0bb MM |
1101 | "target beneath not done yet\n"); |
1102 | return ret; | |
1103 | } | |
1104 | ||
34b7e8a6 PA |
1105 | ALL_NON_EXITED_THREADS (tp) |
1106 | delete_single_step_breakpoints (tp); | |
d02ed0bb | 1107 | |
88d1aa9d | 1108 | if (record_full_resume_step) |
d02ed0bb MM |
1109 | return ret; |
1110 | ||
1111 | /* Is this a SIGTRAP? */ | |
1112 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1113 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1114 | { | |
1115 | struct regcache *regcache; | |
1116 | struct address_space *aspace; | |
9e8915c6 PA |
1117 | enum target_stop_reason *stop_reason_p |
1118 | = &record_full_stop_reason; | |
d02ed0bb MM |
1119 | |
1120 | /* Yes -- this is likely our single-step finishing, | |
1121 | but check if there's any reason the core would be | |
1122 | interested in the event. */ | |
1123 | ||
1124 | registers_changed (); | |
1125 | regcache = get_current_regcache (); | |
1126 | tmp_pc = regcache_read_pc (regcache); | |
1127 | aspace = get_regcache_aspace (regcache); | |
1128 | ||
1129 | if (target_stopped_by_watchpoint ()) | |
1130 | { | |
1131 | /* Always interested in watchpoints. */ | |
1132 | } | |
9e8915c6 PA |
1133 | else if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1134 | stop_reason_p)) | |
d02ed0bb MM |
1135 | { |
1136 | /* There is a breakpoint here. Let the core | |
1137 | handle it. */ | |
d02ed0bb MM |
1138 | } |
1139 | else | |
1140 | { | |
1141 | /* This is a single-step trap. Record the | |
1142 | insn and issue another step. | |
1143 | FIXME: this part can be a random SIGTRAP too. | |
1144 | But GDB cannot handle it. */ | |
1145 | int step = 1; | |
1146 | ||
88d1aa9d MM |
1147 | if (!record_full_message_wrapper_safe (regcache, |
1148 | GDB_SIGNAL_0)) | |
d02ed0bb MM |
1149 | { |
1150 | status->kind = TARGET_WAITKIND_STOPPED; | |
1151 | status->value.sig = GDB_SIGNAL_0; | |
1152 | break; | |
1153 | } | |
1154 | ||
1155 | if (gdbarch_software_single_step_p (gdbarch)) | |
1156 | { | |
1157 | /* Try to insert the software single step breakpoint. | |
1158 | If insert success, set step to 0. */ | |
1159 | set_executing (inferior_ptid, 0); | |
1160 | reinit_frame_cache (); | |
93f9a11f YQ |
1161 | |
1162 | step = !insert_single_step_breakpoints (gdbarch); | |
1163 | ||
d02ed0bb MM |
1164 | set_executing (inferior_ptid, 1); |
1165 | } | |
1166 | ||
1167 | if (record_debug) | |
1168 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1169 | "Process record: record_full_wait " |
1170 | "issuing one more step in the " | |
1171 | "target beneath\n"); | |
6b84065d TT |
1172 | ops->beneath->to_resume (ops->beneath, ptid, step, |
1173 | GDB_SIGNAL_0); | |
85ad3aaf | 1174 | ops->beneath->to_commit_resume (ops->beneath); |
d02ed0bb MM |
1175 | continue; |
1176 | } | |
1177 | } | |
1178 | ||
1179 | /* The inferior is broken by a breakpoint or a signal. */ | |
1180 | break; | |
1181 | } | |
1182 | ||
1183 | return ret; | |
1184 | } | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | struct regcache *regcache = get_current_regcache (); | |
1189 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1190 | struct address_space *aspace = get_regcache_aspace (regcache); | |
1191 | int continue_flag = 1; | |
88d1aa9d MM |
1192 | int first_record_full_end = 1; |
1193 | struct cleanup *old_cleanups | |
1194 | = make_cleanup (record_full_wait_cleanups, 0); | |
d02ed0bb MM |
1195 | CORE_ADDR tmp_pc; |
1196 | ||
9e8915c6 | 1197 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
d02ed0bb MM |
1198 | status->kind = TARGET_WAITKIND_STOPPED; |
1199 | ||
1200 | /* Check breakpoint when forward execute. */ | |
1201 | if (execution_direction == EXEC_FORWARD) | |
1202 | { | |
1203 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1204 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1205 | &record_full_stop_reason)) | |
d02ed0bb | 1206 | { |
d02ed0bb MM |
1207 | if (record_debug) |
1208 | fprintf_unfiltered (gdb_stdlog, | |
1209 | "Process record: break at %s.\n", | |
1210 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb MM |
1211 | goto replay_out; |
1212 | } | |
1213 | } | |
1214 | ||
1215 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
1216 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1217 | mode, because inferior will not executed. | |
1218 | Then set it to terminal_ours to make GDB get the signal. */ | |
1219 | target_terminal_ours (); | |
1220 | ||
88d1aa9d | 1221 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev |
d02ed0bb | 1222 | instruction. */ |
88d1aa9d MM |
1223 | if (execution_direction == EXEC_FORWARD && record_full_list->next) |
1224 | record_full_list = record_full_list->next; | |
d02ed0bb | 1225 | |
88d1aa9d | 1226 | /* Loop over the record_full_list, looking for the next place to |
d02ed0bb MM |
1227 | stop. */ |
1228 | do | |
1229 | { | |
1230 | /* Check for beginning and end of log. */ | |
1231 | if (execution_direction == EXEC_REVERSE | |
88d1aa9d | 1232 | && record_full_list == &record_full_first) |
d02ed0bb MM |
1233 | { |
1234 | /* Hit beginning of record log in reverse. */ | |
1235 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1236 | break; | |
1237 | } | |
88d1aa9d | 1238 | if (execution_direction != EXEC_REVERSE && !record_full_list->next) |
d02ed0bb MM |
1239 | { |
1240 | /* Hit end of record log going forward. */ | |
1241 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1242 | break; | |
1243 | } | |
1244 | ||
88d1aa9d | 1245 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 1246 | |
88d1aa9d | 1247 | if (record_full_list->type == record_full_end) |
d02ed0bb MM |
1248 | { |
1249 | if (record_debug > 1) | |
1250 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1251 | "Process record: record_full_end %s to " |
d02ed0bb | 1252 | "inferior.\n", |
88d1aa9d | 1253 | host_address_to_string (record_full_list)); |
d02ed0bb | 1254 | |
88d1aa9d | 1255 | if (first_record_full_end && execution_direction == EXEC_REVERSE) |
d02ed0bb | 1256 | { |
88d1aa9d MM |
1257 | /* When reverse excute, the first record_full_end is the |
1258 | part of current instruction. */ | |
1259 | first_record_full_end = 0; | |
d02ed0bb MM |
1260 | } |
1261 | else | |
1262 | { | |
88d1aa9d | 1263 | /* In EXEC_REVERSE mode, this is the record_full_end of prev |
d02ed0bb | 1264 | instruction. |
88d1aa9d MM |
1265 | In EXEC_FORWARD mode, this is the record_full_end of |
1266 | current instruction. */ | |
d02ed0bb | 1267 | /* step */ |
88d1aa9d | 1268 | if (record_full_resume_step) |
d02ed0bb MM |
1269 | { |
1270 | if (record_debug > 1) | |
1271 | fprintf_unfiltered (gdb_stdlog, | |
1272 | "Process record: step.\n"); | |
1273 | continue_flag = 0; | |
1274 | } | |
1275 | ||
1276 | /* check breakpoint */ | |
1277 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1278 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1279 | &record_full_stop_reason)) | |
d02ed0bb | 1280 | { |
d02ed0bb MM |
1281 | if (record_debug) |
1282 | fprintf_unfiltered (gdb_stdlog, | |
1283 | "Process record: break " | |
1284 | "at %s.\n", | |
1285 | paddress (gdbarch, tmp_pc)); | |
9e8915c6 | 1286 | |
d02ed0bb MM |
1287 | continue_flag = 0; |
1288 | } | |
1289 | ||
9e8915c6 | 1290 | if (record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT) |
d02ed0bb MM |
1291 | { |
1292 | if (record_debug) | |
1293 | fprintf_unfiltered (gdb_stdlog, | |
1294 | "Process record: hit hw " | |
1295 | "watchpoint.\n"); | |
1296 | continue_flag = 0; | |
1297 | } | |
1298 | /* Check target signal */ | |
88d1aa9d | 1299 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb MM |
1300 | /* FIXME: better way to check */ |
1301 | continue_flag = 0; | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | if (continue_flag) | |
1306 | { | |
1307 | if (execution_direction == EXEC_REVERSE) | |
1308 | { | |
88d1aa9d MM |
1309 | if (record_full_list->prev) |
1310 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
1311 | } |
1312 | else | |
1313 | { | |
88d1aa9d MM |
1314 | if (record_full_list->next) |
1315 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1316 | } |
1317 | } | |
1318 | } | |
1319 | while (continue_flag); | |
1320 | ||
1321 | replay_out: | |
88d1aa9d | 1322 | if (record_full_get_sig) |
d02ed0bb | 1323 | status->value.sig = GDB_SIGNAL_INT; |
88d1aa9d | 1324 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb | 1325 | /* FIXME: better way to check */ |
88d1aa9d | 1326 | status->value.sig = record_full_list->u.end.sigval; |
d02ed0bb MM |
1327 | else |
1328 | status->value.sig = GDB_SIGNAL_TRAP; | |
1329 | ||
1330 | discard_cleanups (old_cleanups); | |
1331 | } | |
1332 | ||
1333 | signal (SIGINT, handle_sigint); | |
1334 | ||
1335 | do_cleanups (set_cleanups); | |
1336 | return inferior_ptid; | |
1337 | } | |
1338 | ||
1339 | static ptid_t | |
88d1aa9d MM |
1340 | record_full_wait (struct target_ops *ops, |
1341 | ptid_t ptid, struct target_waitstatus *status, | |
1342 | int options) | |
d02ed0bb MM |
1343 | { |
1344 | ptid_t return_ptid; | |
1345 | ||
88d1aa9d | 1346 | return_ptid = record_full_wait_1 (ops, ptid, status, options); |
d02ed0bb MM |
1347 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1348 | { | |
1349 | /* We're reporting a stop. Make sure any spurious | |
1350 | target_wait(WNOHANG) doesn't advance the target until the | |
1351 | core wants us resumed again. */ | |
88d1aa9d | 1352 | record_full_resumed = 0; |
d02ed0bb MM |
1353 | } |
1354 | return return_ptid; | |
1355 | } | |
1356 | ||
1357 | static int | |
6a109b6b | 1358 | record_full_stopped_by_watchpoint (struct target_ops *ops) |
d02ed0bb | 1359 | { |
88d1aa9d | 1360 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1361 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1362 | else |
6b84065d | 1363 | return ops->beneath->to_stopped_by_watchpoint (ops->beneath); |
d02ed0bb MM |
1364 | } |
1365 | ||
d02ed0bb | 1366 | static int |
88d1aa9d | 1367 | record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) |
d02ed0bb | 1368 | { |
88d1aa9d | 1369 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1370 | return 0; |
1371 | else | |
6b84065d | 1372 | return ops->beneath->to_stopped_data_address (ops->beneath, addr_p); |
d02ed0bb MM |
1373 | } |
1374 | ||
9e8915c6 PA |
1375 | /* The to_stopped_by_sw_breakpoint method of target record-full. */ |
1376 | ||
1377 | static int | |
1378 | record_full_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1379 | { | |
1380 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1381 | } | |
1382 | ||
1383 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1384 | record-full. */ | |
1385 | ||
1386 | static int | |
1387 | record_full_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1388 | { | |
1389 | return 1; | |
1390 | } | |
1391 | ||
1392 | /* The to_stopped_by_hw_breakpoint method of target record-full. */ | |
1393 | ||
1394 | static int | |
1395 | record_full_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1396 | { | |
1397 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
1398 | } | |
1399 | ||
1400 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1401 | record-full. */ | |
1402 | ||
1403 | static int | |
1404 | record_full_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1405 | { | |
1406 | return 1; | |
1407 | } | |
1408 | ||
d02ed0bb MM |
1409 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1410 | ||
1411 | static void | |
88d1aa9d | 1412 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1413 | { |
88d1aa9d | 1414 | /* Check record_full_insn_num. */ |
651ce16a | 1415 | record_full_check_insn_num (); |
d02ed0bb | 1416 | |
88d1aa9d MM |
1417 | record_full_arch_list_head = NULL; |
1418 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1419 | |
1420 | if (regnum < 0) | |
1421 | { | |
1422 | int i; | |
1423 | ||
1424 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
1425 | { | |
25ea693b | 1426 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1427 | { |
88d1aa9d | 1428 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1429 | error (_("Process record: failed to record execution log.")); |
1430 | } | |
1431 | } | |
1432 | } | |
1433 | else | |
1434 | { | |
25ea693b | 1435 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1436 | { |
88d1aa9d | 1437 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1438 | error (_("Process record: failed to record execution log.")); |
1439 | } | |
1440 | } | |
25ea693b | 1441 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1442 | { |
88d1aa9d | 1443 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1444 | error (_("Process record: failed to record execution log.")); |
1445 | } | |
88d1aa9d MM |
1446 | record_full_list->next = record_full_arch_list_head; |
1447 | record_full_arch_list_head->prev = record_full_list; | |
1448 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1449 | |
7ee70bf5 | 1450 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1451 | record_full_list_release_first (); |
d02ed0bb | 1452 | else |
88d1aa9d | 1453 | record_full_insn_num++; |
d02ed0bb MM |
1454 | } |
1455 | ||
1456 | /* "to_store_registers" method for process record target. */ | |
1457 | ||
1458 | static void | |
88d1aa9d MM |
1459 | record_full_store_registers (struct target_ops *ops, |
1460 | struct regcache *regcache, | |
1461 | int regno) | |
d02ed0bb | 1462 | { |
88d1aa9d | 1463 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1464 | { |
88d1aa9d | 1465 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1466 | { |
1467 | int n; | |
1468 | ||
1469 | /* Let user choose if he wants to write register or not. */ | |
1470 | if (regno < 0) | |
1471 | n = | |
1472 | query (_("Because GDB is in replay mode, changing the " | |
1473 | "value of a register will make the execution " | |
1474 | "log unusable from this point onward. " | |
1475 | "Change all registers?")); | |
1476 | else | |
1477 | n = | |
1478 | query (_("Because GDB is in replay mode, changing the value " | |
1479 | "of a register will make the execution log unusable " | |
1480 | "from this point onward. Change register %s?"), | |
1481 | gdbarch_register_name (get_regcache_arch (regcache), | |
1482 | regno)); | |
1483 | ||
1484 | if (!n) | |
1485 | { | |
1486 | /* Invalidate the value of regcache that was set in function | |
1487 | "regcache_raw_write". */ | |
1488 | if (regno < 0) | |
1489 | { | |
1490 | int i; | |
1491 | ||
1492 | for (i = 0; | |
1493 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1494 | i++) | |
1495 | regcache_invalidate (regcache, i); | |
1496 | } | |
1497 | else | |
1498 | regcache_invalidate (regcache, regno); | |
1499 | ||
1500 | error (_("Process record canceled the operation.")); | |
1501 | } | |
1502 | ||
1503 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1504 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1505 | } |
1506 | ||
88d1aa9d | 1507 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1508 | } |
6b84065d | 1509 | ops->beneath->to_store_registers (ops->beneath, regcache, regno); |
d02ed0bb MM |
1510 | } |
1511 | ||
88d1aa9d MM |
1512 | /* "to_xfer_partial" method. Behavior is conditional on |
1513 | RECORD_FULL_IS_REPLAY. | |
d02ed0bb MM |
1514 | In replay mode, we cannot write memory unles we are willing to |
1515 | invalidate the record/replay log from this point forward. */ | |
1516 | ||
9b409511 | 1517 | static enum target_xfer_status |
88d1aa9d MM |
1518 | record_full_xfer_partial (struct target_ops *ops, enum target_object object, |
1519 | const char *annex, gdb_byte *readbuf, | |
1520 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1521 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb | 1522 | { |
88d1aa9d | 1523 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1524 | && (object == TARGET_OBJECT_MEMORY |
1525 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1526 | { | |
88d1aa9d | 1527 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1528 | { |
1529 | /* Let user choose if he wants to write memory or not. */ | |
1530 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
1531 | "will make the execution log unusable from this " | |
1532 | "point onward. Write memory at address %s?"), | |
1533 | paddress (target_gdbarch (), offset))) | |
1534 | error (_("Process record canceled the operation.")); | |
1535 | ||
1536 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1537 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1538 | } |
1539 | ||
88d1aa9d | 1540 | /* Check record_full_insn_num */ |
651ce16a | 1541 | record_full_check_insn_num (); |
d02ed0bb MM |
1542 | |
1543 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1544 | record_full_arch_list_head = NULL; |
1545 | record_full_arch_list_tail = NULL; | |
25ea693b | 1546 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1547 | { |
88d1aa9d | 1548 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1549 | if (record_debug) |
1550 | fprintf_unfiltered (gdb_stdlog, | |
1551 | "Process record: failed to record " | |
1552 | "execution log."); | |
2ed4b548 | 1553 | return TARGET_XFER_E_IO; |
d02ed0bb | 1554 | } |
25ea693b | 1555 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1556 | { |
88d1aa9d | 1557 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1558 | if (record_debug) |
1559 | fprintf_unfiltered (gdb_stdlog, | |
1560 | "Process record: failed to record " | |
1561 | "execution log."); | |
2ed4b548 | 1562 | return TARGET_XFER_E_IO; |
d02ed0bb | 1563 | } |
88d1aa9d MM |
1564 | record_full_list->next = record_full_arch_list_head; |
1565 | record_full_arch_list_head->prev = record_full_list; | |
1566 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1567 | |
7ee70bf5 | 1568 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1569 | record_full_list_release_first (); |
d02ed0bb | 1570 | else |
88d1aa9d | 1571 | record_full_insn_num++; |
d02ed0bb MM |
1572 | } |
1573 | ||
6b84065d TT |
1574 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
1575 | readbuf, writebuf, offset, | |
1576 | len, xfered_len); | |
d02ed0bb MM |
1577 | } |
1578 | ||
1579 | /* This structure represents a breakpoint inserted while the record | |
1580 | target is active. We use this to know when to install/remove | |
1581 | breakpoints in/from the target beneath. For example, a breakpoint | |
1582 | may be inserted while recording, but removed when not replaying nor | |
1583 | recording. In that case, the breakpoint had not been inserted on | |
1584 | the target beneath, so we should not try to remove it there. */ | |
1585 | ||
88d1aa9d | 1586 | struct record_full_breakpoint |
d02ed0bb MM |
1587 | { |
1588 | /* The address and address space the breakpoint was set at. */ | |
1589 | struct address_space *address_space; | |
1590 | CORE_ADDR addr; | |
1591 | ||
1592 | /* True when the breakpoint has been also installed in the target | |
1593 | beneath. This will be false for breakpoints set during replay or | |
1594 | when recording. */ | |
1595 | int in_target_beneath; | |
1596 | }; | |
1597 | ||
88d1aa9d MM |
1598 | typedef struct record_full_breakpoint *record_full_breakpoint_p; |
1599 | DEF_VEC_P(record_full_breakpoint_p); | |
d02ed0bb MM |
1600 | |
1601 | /* The list of breakpoints inserted while the record target is | |
1602 | active. */ | |
88d1aa9d | 1603 | VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL; |
d02ed0bb MM |
1604 | |
1605 | static void | |
88d1aa9d | 1606 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1607 | { |
1608 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1609 | return; | |
1610 | ||
1611 | if (loc->inserted) | |
1612 | { | |
88d1aa9d | 1613 | struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1614 | |
1615 | bp->addr = loc->target_info.placed_address; | |
1616 | bp->address_space = loc->target_info.placed_address_space; | |
1617 | ||
1618 | bp->in_target_beneath = 1; | |
1619 | ||
88d1aa9d | 1620 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1621 | } |
1622 | } | |
1623 | ||
88d1aa9d | 1624 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1625 | |
1626 | static void | |
88d1aa9d | 1627 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1628 | { |
88d1aa9d | 1629 | VEC_free (record_full_breakpoint_p, record_full_breakpoints); |
d02ed0bb | 1630 | |
88d1aa9d | 1631 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1632 | } |
1633 | ||
88d1aa9d | 1634 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1635 | insert or remove breakpoints in the real target when replaying, nor |
1636 | when recording. */ | |
1637 | ||
1638 | static int | |
3db08215 MM |
1639 | record_full_insert_breakpoint (struct target_ops *ops, |
1640 | struct gdbarch *gdbarch, | |
88d1aa9d | 1641 | struct bp_target_info *bp_tgt) |
d02ed0bb | 1642 | { |
88d1aa9d | 1643 | struct record_full_breakpoint *bp; |
d02ed0bb | 1644 | int in_target_beneath = 0; |
e390720b | 1645 | int ix; |
d02ed0bb | 1646 | |
88d1aa9d | 1647 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1648 | { |
1649 | /* When recording, we currently always single-step, so we don't | |
1650 | really need to install regular breakpoints in the inferior. | |
1651 | However, we do have to insert software single-step | |
1652 | breakpoints, in case the target can't hardware step. To keep | |
f99bd5f2 | 1653 | things simple, we always insert. */ |
d02ed0bb MM |
1654 | struct cleanup *old_cleanups; |
1655 | int ret; | |
1656 | ||
25ea693b | 1657 | old_cleanups = record_full_gdb_operation_disable_set (); |
6b84065d | 1658 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
d02ed0bb MM |
1659 | do_cleanups (old_cleanups); |
1660 | ||
1661 | if (ret != 0) | |
1662 | return ret; | |
1663 | ||
1664 | in_target_beneath = 1; | |
1665 | } | |
1666 | ||
e390720b YQ |
1667 | /* Use the existing entries if found in order to avoid duplication |
1668 | in record_full_breakpoints. */ | |
1669 | ||
1670 | for (ix = 0; | |
1671 | VEC_iterate (record_full_breakpoint_p, | |
1672 | record_full_breakpoints, ix, bp); | |
1673 | ++ix) | |
1674 | { | |
1675 | if (bp->addr == bp_tgt->placed_address | |
1676 | && bp->address_space == bp_tgt->placed_address_space) | |
1677 | { | |
1678 | gdb_assert (bp->in_target_beneath == in_target_beneath); | |
1679 | return 0; | |
1680 | } | |
1681 | } | |
1682 | ||
88d1aa9d | 1683 | bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1684 | bp->addr = bp_tgt->placed_address; |
1685 | bp->address_space = bp_tgt->placed_address_space; | |
1686 | bp->in_target_beneath = in_target_beneath; | |
88d1aa9d | 1687 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1688 | return 0; |
1689 | } | |
1690 | ||
1691 | /* "to_remove_breakpoint" method for process record target. */ | |
1692 | ||
1693 | static int | |
3db08215 MM |
1694 | record_full_remove_breakpoint (struct target_ops *ops, |
1695 | struct gdbarch *gdbarch, | |
73971819 PA |
1696 | struct bp_target_info *bp_tgt, |
1697 | enum remove_bp_reason reason) | |
d02ed0bb | 1698 | { |
88d1aa9d | 1699 | struct record_full_breakpoint *bp; |
d02ed0bb MM |
1700 | int ix; |
1701 | ||
1702 | for (ix = 0; | |
88d1aa9d MM |
1703 | VEC_iterate (record_full_breakpoint_p, |
1704 | record_full_breakpoints, ix, bp); | |
d02ed0bb MM |
1705 | ++ix) |
1706 | { | |
1707 | if (bp->addr == bp_tgt->placed_address | |
1708 | && bp->address_space == bp_tgt->placed_address_space) | |
1709 | { | |
1710 | if (bp->in_target_beneath) | |
1711 | { | |
1712 | struct cleanup *old_cleanups; | |
1713 | int ret; | |
1714 | ||
25ea693b | 1715 | old_cleanups = record_full_gdb_operation_disable_set (); |
6b84065d | 1716 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, |
73971819 | 1717 | bp_tgt, reason); |
d02ed0bb MM |
1718 | do_cleanups (old_cleanups); |
1719 | ||
1720 | if (ret != 0) | |
1721 | return ret; | |
1722 | } | |
1723 | ||
01d3dedf PA |
1724 | if (reason == REMOVE_BREAKPOINT) |
1725 | { | |
1726 | VEC_unordered_remove (record_full_breakpoint_p, | |
1727 | record_full_breakpoints, ix); | |
1728 | } | |
d02ed0bb MM |
1729 | return 0; |
1730 | } | |
1731 | } | |
1732 | ||
1733 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1734 | } | |
1735 | ||
1736 | /* "to_can_execute_reverse" method for process record target. */ | |
1737 | ||
1738 | static int | |
19db3e69 | 1739 | record_full_can_execute_reverse (struct target_ops *self) |
d02ed0bb MM |
1740 | { |
1741 | return 1; | |
1742 | } | |
1743 | ||
1744 | /* "to_get_bookmark" method for process record and prec over core. */ | |
1745 | ||
1746 | static gdb_byte * | |
c2bcbb1d TT |
1747 | record_full_get_bookmark (struct target_ops *self, const char *args, |
1748 | int from_tty) | |
d02ed0bb | 1749 | { |
0f928d68 | 1750 | char *ret = NULL; |
d02ed0bb MM |
1751 | |
1752 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1753 | if (record_full_list && record_full_list->type == record_full_end) |
1754 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1755 | |
1756 | if (record_debug) | |
1757 | { | |
1758 | if (ret) | |
1759 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1760 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1761 | else |
1762 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1763 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1764 | } |
0f928d68 | 1765 | return (gdb_byte *) ret; |
d02ed0bb MM |
1766 | } |
1767 | ||
1768 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1769 | ||
1770 | static void | |
3c80fb48 | 1771 | record_full_goto_bookmark (struct target_ops *self, |
c2bcbb1d | 1772 | const gdb_byte *raw_bookmark, int from_tty) |
d02ed0bb | 1773 | { |
c2bcbb1d TT |
1774 | const char *bookmark = (const char *) raw_bookmark; |
1775 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); | |
0f928d68 | 1776 | |
d02ed0bb MM |
1777 | if (record_debug) |
1778 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1779 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb MM |
1780 | |
1781 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1782 | { | |
c2bcbb1d TT |
1783 | char *copy; |
1784 | ||
d02ed0bb MM |
1785 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) |
1786 | error (_("Unbalanced quotes: %s"), bookmark); | |
1787 | ||
c2bcbb1d TT |
1788 | |
1789 | copy = savestring (bookmark + 1, strlen (bookmark) - 2); | |
1790 | make_cleanup (xfree, copy); | |
1791 | bookmark = copy; | |
d02ed0bb MM |
1792 | } |
1793 | ||
c2bcbb1d TT |
1794 | record_goto (bookmark); |
1795 | ||
1796 | do_cleanups (cleanup); | |
d02ed0bb MM |
1797 | } |
1798 | ||
d02ed0bb | 1799 | static enum exec_direction_kind |
4c612759 | 1800 | record_full_execution_direction (struct target_ops *self) |
d02ed0bb | 1801 | { |
88d1aa9d | 1802 | return record_full_execution_dir; |
d02ed0bb MM |
1803 | } |
1804 | ||
1805 | static void | |
630d6a4a | 1806 | record_full_info (struct target_ops *self) |
d02ed0bb | 1807 | { |
88d1aa9d | 1808 | struct record_full_entry *p; |
d02ed0bb | 1809 | |
88d1aa9d | 1810 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1811 | printf_filtered (_("Replay mode:\n")); |
1812 | else | |
1813 | printf_filtered (_("Record mode:\n")); | |
1814 | ||
1815 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1816 | for (p = record_full_first.next; |
1817 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1818 | p = p->next) |
1819 | ; | |
1820 | ||
1821 | /* Do we have a log at all? */ | |
88d1aa9d | 1822 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1823 | { |
1824 | /* Display instruction number for first instruction in the log. */ | |
1825 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1826 | pulongest (p->u.end.insn_num)); | |
1827 | ||
1828 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1829 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1830 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1831 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1832 | |
1833 | /* Display instruction number for last instruction in the log. */ | |
1834 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1835 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1836 | |
1837 | /* Display log count. */ | |
7ee70bf5 | 1838 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1839 | record_full_insn_num); |
d02ed0bb MM |
1840 | } |
1841 | else | |
1842 | printf_filtered (_("No instructions have been logged.\n")); | |
1843 | ||
1844 | /* Display max log size. */ | |
7ee70bf5 | 1845 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1846 | record_full_insn_max_num); |
d02ed0bb MM |
1847 | } |
1848 | ||
1849 | /* The "to_record_delete" target method. */ | |
1850 | ||
1851 | static void | |
d1b55219 | 1852 | record_full_delete (struct target_ops *self) |
d02ed0bb | 1853 | { |
88d1aa9d | 1854 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1855 | } |
1856 | ||
1857 | /* The "to_record_is_replaying" target method. */ | |
1858 | ||
1859 | static int | |
a52eab48 | 1860 | record_full_is_replaying (struct target_ops *self, ptid_t ptid) |
d02ed0bb | 1861 | { |
88d1aa9d | 1862 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1863 | } |
1864 | ||
7ff27e9b MM |
1865 | /* The "to_record_will_replay" target method. */ |
1866 | ||
1867 | static int | |
1868 | record_full_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1869 | { | |
1870 | /* We can currently only record when executing forwards. Should we be able | |
1871 | to record when executing backwards on targets that support reverse | |
1872 | execution, this needs to be changed. */ | |
1873 | ||
1874 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1875 | } | |
1876 | ||
d02ed0bb MM |
1877 | /* Go to a specific entry. */ |
1878 | ||
1879 | static void | |
88d1aa9d | 1880 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1881 | { |
1882 | if (p == NULL) | |
1883 | error (_("Target insn not found.")); | |
88d1aa9d | 1884 | else if (p == record_full_list) |
d02ed0bb | 1885 | error (_("Already at target insn.")); |
88d1aa9d | 1886 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1887 | { |
1888 | printf_filtered (_("Go forward to insn number %s\n"), | |
1889 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1890 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
1891 | } |
1892 | else | |
1893 | { | |
1894 | printf_filtered (_("Go backward to insn number %s\n"), | |
1895 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1896 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
1897 | } |
1898 | ||
1899 | registers_changed (); | |
1900 | reinit_frame_cache (); | |
485668e5 | 1901 | stop_pc = regcache_read_pc (get_current_regcache ()); |
08d72866 | 1902 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
1903 | } |
1904 | ||
1905 | /* The "to_goto_record_begin" target method. */ | |
1906 | ||
1907 | static void | |
08475817 | 1908 | record_full_goto_begin (struct target_ops *self) |
d02ed0bb | 1909 | { |
88d1aa9d | 1910 | struct record_full_entry *p = NULL; |
d02ed0bb | 1911 | |
88d1aa9d MM |
1912 | for (p = &record_full_first; p != NULL; p = p->next) |
1913 | if (p->type == record_full_end) | |
d02ed0bb MM |
1914 | break; |
1915 | ||
88d1aa9d | 1916 | record_full_goto_entry (p); |
d02ed0bb MM |
1917 | } |
1918 | ||
1919 | /* The "to_goto_record_end" target method. */ | |
1920 | ||
1921 | static void | |
307a1b91 | 1922 | record_full_goto_end (struct target_ops *self) |
d02ed0bb | 1923 | { |
88d1aa9d | 1924 | struct record_full_entry *p = NULL; |
d02ed0bb | 1925 | |
88d1aa9d | 1926 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
1927 | ; |
1928 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 1929 | if (p->type == record_full_end) |
d02ed0bb MM |
1930 | break; |
1931 | ||
88d1aa9d | 1932 | record_full_goto_entry (p); |
d02ed0bb MM |
1933 | } |
1934 | ||
1935 | /* The "to_goto_record" target method. */ | |
1936 | ||
1937 | static void | |
606183ac | 1938 | record_full_goto (struct target_ops *self, ULONGEST target_insn) |
d02ed0bb | 1939 | { |
88d1aa9d | 1940 | struct record_full_entry *p = NULL; |
d02ed0bb | 1941 | |
88d1aa9d MM |
1942 | for (p = &record_full_first; p != NULL; p = p->next) |
1943 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
1944 | break; |
1945 | ||
88d1aa9d | 1946 | record_full_goto_entry (p); |
d02ed0bb MM |
1947 | } |
1948 | ||
797094dd MM |
1949 | /* The "to_record_stop_replaying" target method. */ |
1950 | ||
1951 | static void | |
1952 | record_full_stop_replaying (struct target_ops *self) | |
1953 | { | |
1954 | record_full_goto_end (self); | |
1955 | } | |
1956 | ||
d02ed0bb | 1957 | static void |
88d1aa9d | 1958 | init_record_full_ops (void) |
d02ed0bb | 1959 | { |
88d1aa9d MM |
1960 | record_full_ops.to_shortname = "record-full"; |
1961 | record_full_ops.to_longname = "Process record and replay target"; | |
1962 | record_full_ops.to_doc = | |
d02ed0bb | 1963 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
1964 | record_full_ops.to_open = record_full_open; |
1965 | record_full_ops.to_close = record_full_close; | |
b7d2e916 | 1966 | record_full_ops.to_async = record_full_async; |
88d1aa9d | 1967 | record_full_ops.to_resume = record_full_resume; |
85ad3aaf | 1968 | record_full_ops.to_commit_resume = record_full_commit_resume; |
88d1aa9d | 1969 | record_full_ops.to_wait = record_full_wait; |
7c1687a9 MM |
1970 | record_full_ops.to_disconnect = record_disconnect; |
1971 | record_full_ops.to_detach = record_detach; | |
1972 | record_full_ops.to_mourn_inferior = record_mourn_inferior; | |
1973 | record_full_ops.to_kill = record_kill; | |
88d1aa9d MM |
1974 | record_full_ops.to_store_registers = record_full_store_registers; |
1975 | record_full_ops.to_xfer_partial = record_full_xfer_partial; | |
1976 | record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint; | |
1977 | record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint; | |
1978 | record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint; | |
1979 | record_full_ops.to_stopped_data_address = record_full_stopped_data_address; | |
9e8915c6 PA |
1980 | record_full_ops.to_stopped_by_sw_breakpoint |
1981 | = record_full_stopped_by_sw_breakpoint; | |
1982 | record_full_ops.to_supports_stopped_by_sw_breakpoint | |
1983 | = record_full_supports_stopped_by_sw_breakpoint; | |
1984 | record_full_ops.to_stopped_by_hw_breakpoint | |
1985 | = record_full_stopped_by_hw_breakpoint; | |
1986 | record_full_ops.to_supports_stopped_by_hw_breakpoint | |
1987 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
1988 | record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse; |
1989 | record_full_ops.to_stratum = record_stratum; | |
d02ed0bb | 1990 | /* Add bookmark target methods. */ |
88d1aa9d MM |
1991 | record_full_ops.to_get_bookmark = record_full_get_bookmark; |
1992 | record_full_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
1993 | record_full_ops.to_execution_direction = record_full_execution_direction; |
1994 | record_full_ops.to_info_record = record_full_info; | |
1995 | record_full_ops.to_save_record = record_full_save; | |
1996 | record_full_ops.to_delete_record = record_full_delete; | |
1997 | record_full_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 1998 | record_full_ops.to_record_will_replay = record_full_will_replay; |
797094dd | 1999 | record_full_ops.to_record_stop_replaying = record_full_stop_replaying; |
88d1aa9d MM |
2000 | record_full_ops.to_goto_record_begin = record_full_goto_begin; |
2001 | record_full_ops.to_goto_record_end = record_full_goto_end; | |
2002 | record_full_ops.to_goto_record = record_full_goto; | |
2003 | record_full_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2004 | } |
2005 | ||
2006 | /* "to_resume" method for prec over corefile. */ | |
2007 | ||
2008 | static void | |
88d1aa9d MM |
2009 | record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step, |
2010 | enum gdb_signal signal) | |
d02ed0bb | 2011 | { |
88d1aa9d MM |
2012 | record_full_resume_step = step; |
2013 | record_full_resumed = 1; | |
2014 | record_full_execution_dir = execution_direction; | |
d02ed0bb MM |
2015 | |
2016 | /* We are about to start executing the inferior (or simulate it), | |
2017 | let's register it with the event loop. */ | |
2018 | if (target_can_async_p ()) | |
6a3753b3 | 2019 | target_async (1); |
d02ed0bb MM |
2020 | } |
2021 | ||
2022 | /* "to_kill" method for prec over corefile. */ | |
2023 | ||
2024 | static void | |
88d1aa9d | 2025 | record_full_core_kill (struct target_ops *ops) |
d02ed0bb MM |
2026 | { |
2027 | if (record_debug) | |
88d1aa9d | 2028 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2029 | |
88d1aa9d | 2030 | unpush_target (&record_full_core_ops); |
d02ed0bb MM |
2031 | } |
2032 | ||
2033 | /* "to_fetch_registers" method for prec over corefile. */ | |
2034 | ||
2035 | static void | |
88d1aa9d MM |
2036 | record_full_core_fetch_registers (struct target_ops *ops, |
2037 | struct regcache *regcache, | |
2038 | int regno) | |
d02ed0bb MM |
2039 | { |
2040 | if (regno < 0) | |
2041 | { | |
2042 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
2043 | int i; | |
2044 | ||
2045 | for (i = 0; i < num; i ++) | |
2046 | regcache_raw_supply (regcache, i, | |
88d1aa9d | 2047 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb MM |
2048 | } |
2049 | else | |
2050 | regcache_raw_supply (regcache, regno, | |
88d1aa9d | 2051 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2052 | } |
2053 | ||
2054 | /* "to_prepare_to_store" method for prec over corefile. */ | |
2055 | ||
2056 | static void | |
f32dbf8c MM |
2057 | record_full_core_prepare_to_store (struct target_ops *self, |
2058 | struct regcache *regcache) | |
d02ed0bb MM |
2059 | { |
2060 | } | |
2061 | ||
2062 | /* "to_store_registers" method for prec over corefile. */ | |
2063 | ||
2064 | static void | |
88d1aa9d | 2065 | record_full_core_store_registers (struct target_ops *ops, |
d02ed0bb MM |
2066 | struct regcache *regcache, |
2067 | int regno) | |
2068 | { | |
88d1aa9d | 2069 | if (record_full_gdb_operation_disable) |
d02ed0bb | 2070 | regcache_raw_collect (regcache, regno, |
88d1aa9d | 2071 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2072 | else |
2073 | error (_("You can't do that without a process to debug.")); | |
2074 | } | |
2075 | ||
2076 | /* "to_xfer_partial" method for prec over corefile. */ | |
2077 | ||
9b409511 | 2078 | static enum target_xfer_status |
88d1aa9d MM |
2079 | record_full_core_xfer_partial (struct target_ops *ops, |
2080 | enum target_object object, | |
2081 | const char *annex, gdb_byte *readbuf, | |
2082 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 2083 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb MM |
2084 | { |
2085 | if (object == TARGET_OBJECT_MEMORY) | |
2086 | { | |
88d1aa9d | 2087 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb MM |
2088 | { |
2089 | struct target_section *p; | |
2090 | ||
88d1aa9d | 2091 | for (p = record_full_core_start; p < record_full_core_end; p++) |
d02ed0bb MM |
2092 | { |
2093 | if (offset >= p->addr) | |
2094 | { | |
88d1aa9d | 2095 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2096 | ULONGEST sec_offset; |
2097 | ||
2098 | if (offset >= p->endaddr) | |
2099 | continue; | |
2100 | ||
2101 | if (offset + len > p->endaddr) | |
2102 | len = p->endaddr - offset; | |
2103 | ||
2104 | sec_offset = offset - p->addr; | |
2105 | ||
2106 | /* Read readbuf or write writebuf p, offset, len. */ | |
2107 | /* Check flags. */ | |
2108 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2109 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2110 | { | |
2111 | if (readbuf) | |
2112 | memset (readbuf, 0, len); | |
9b409511 YQ |
2113 | |
2114 | *xfered_len = len; | |
2115 | return TARGET_XFER_OK; | |
d02ed0bb | 2116 | } |
88d1aa9d MM |
2117 | /* Get record_full_core_buf_entry. */ |
2118 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb MM |
2119 | entry = entry->prev) |
2120 | if (entry->p == p) | |
2121 | break; | |
2122 | if (writebuf) | |
2123 | { | |
2124 | if (!entry) | |
2125 | { | |
2126 | /* Add a new entry. */ | |
8d749320 | 2127 | entry = XNEW (struct record_full_core_buf_entry); |
d02ed0bb | 2128 | entry->p = p; |
2b2848e2 DE |
2129 | if (!bfd_malloc_and_get_section |
2130 | (p->the_bfd_section->owner, | |
2131 | p->the_bfd_section, | |
2132 | &entry->buf)) | |
d02ed0bb MM |
2133 | { |
2134 | xfree (entry); | |
9b409511 | 2135 | return TARGET_XFER_EOF; |
d02ed0bb | 2136 | } |
88d1aa9d MM |
2137 | entry->prev = record_full_core_buf_list; |
2138 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2139 | } |
2140 | ||
2141 | memcpy (entry->buf + sec_offset, writebuf, | |
2142 | (size_t) len); | |
2143 | } | |
2144 | else | |
2145 | { | |
2146 | if (!entry) | |
6b84065d TT |
2147 | return ops->beneath->to_xfer_partial (ops->beneath, |
2148 | object, annex, | |
2149 | readbuf, writebuf, | |
2150 | offset, len, | |
2151 | xfered_len); | |
d02ed0bb MM |
2152 | |
2153 | memcpy (readbuf, entry->buf + sec_offset, | |
2154 | (size_t) len); | |
2155 | } | |
2156 | ||
9b409511 YQ |
2157 | *xfered_len = len; |
2158 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2159 | } |
2160 | } | |
2161 | ||
2ed4b548 | 2162 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2163 | } |
2164 | else | |
2165 | error (_("You can't do that without a process to debug.")); | |
2166 | } | |
2167 | ||
6b84065d TT |
2168 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2169 | readbuf, writebuf, offset, len, | |
2170 | xfered_len); | |
d02ed0bb MM |
2171 | } |
2172 | ||
2173 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2174 | ||
2175 | static int | |
3db08215 MM |
2176 | record_full_core_insert_breakpoint (struct target_ops *ops, |
2177 | struct gdbarch *gdbarch, | |
88d1aa9d | 2178 | struct bp_target_info *bp_tgt) |
d02ed0bb MM |
2179 | { |
2180 | return 0; | |
2181 | } | |
2182 | ||
2183 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2184 | ||
2185 | static int | |
3db08215 MM |
2186 | record_full_core_remove_breakpoint (struct target_ops *ops, |
2187 | struct gdbarch *gdbarch, | |
73971819 PA |
2188 | struct bp_target_info *bp_tgt, |
2189 | enum remove_bp_reason reason) | |
d02ed0bb MM |
2190 | { |
2191 | return 0; | |
2192 | } | |
2193 | ||
2194 | /* "to_has_execution" method for prec over corefile. */ | |
2195 | ||
2196 | static int | |
88d1aa9d | 2197 | record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid) |
d02ed0bb MM |
2198 | { |
2199 | return 1; | |
2200 | } | |
2201 | ||
2202 | static void | |
88d1aa9d | 2203 | init_record_full_core_ops (void) |
d02ed0bb | 2204 | { |
88d1aa9d MM |
2205 | record_full_core_ops.to_shortname = "record-core"; |
2206 | record_full_core_ops.to_longname = "Process record and replay target"; | |
2207 | record_full_core_ops.to_doc = | |
d02ed0bb | 2208 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
2209 | record_full_core_ops.to_open = record_full_open; |
2210 | record_full_core_ops.to_close = record_full_close; | |
b7d2e916 | 2211 | record_full_core_ops.to_async = record_full_async; |
88d1aa9d MM |
2212 | record_full_core_ops.to_resume = record_full_core_resume; |
2213 | record_full_core_ops.to_wait = record_full_wait; | |
2214 | record_full_core_ops.to_kill = record_full_core_kill; | |
2215 | record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers; | |
2216 | record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store; | |
2217 | record_full_core_ops.to_store_registers = record_full_core_store_registers; | |
2218 | record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial; | |
2219 | record_full_core_ops.to_insert_breakpoint | |
2220 | = record_full_core_insert_breakpoint; | |
2221 | record_full_core_ops.to_remove_breakpoint | |
2222 | = record_full_core_remove_breakpoint; | |
2223 | record_full_core_ops.to_stopped_by_watchpoint | |
2224 | = record_full_stopped_by_watchpoint; | |
2225 | record_full_core_ops.to_stopped_data_address | |
2226 | = record_full_stopped_data_address; | |
9e8915c6 PA |
2227 | record_full_core_ops.to_stopped_by_sw_breakpoint |
2228 | = record_full_stopped_by_sw_breakpoint; | |
2229 | record_full_core_ops.to_supports_stopped_by_sw_breakpoint | |
2230 | = record_full_supports_stopped_by_sw_breakpoint; | |
2231 | record_full_core_ops.to_stopped_by_hw_breakpoint | |
2232 | = record_full_stopped_by_hw_breakpoint; | |
2233 | record_full_core_ops.to_supports_stopped_by_hw_breakpoint | |
2234 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
2235 | record_full_core_ops.to_can_execute_reverse |
2236 | = record_full_can_execute_reverse; | |
2237 | record_full_core_ops.to_has_execution = record_full_core_has_execution; | |
2238 | record_full_core_ops.to_stratum = record_stratum; | |
d02ed0bb | 2239 | /* Add bookmark target methods. */ |
88d1aa9d MM |
2240 | record_full_core_ops.to_get_bookmark = record_full_get_bookmark; |
2241 | record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
2242 | record_full_core_ops.to_execution_direction |
2243 | = record_full_execution_direction; | |
2244 | record_full_core_ops.to_info_record = record_full_info; | |
2245 | record_full_core_ops.to_delete_record = record_full_delete; | |
2246 | record_full_core_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 2247 | record_full_core_ops.to_record_will_replay = record_full_will_replay; |
88d1aa9d MM |
2248 | record_full_core_ops.to_goto_record_begin = record_full_goto_begin; |
2249 | record_full_core_ops.to_goto_record_end = record_full_goto_end; | |
2250 | record_full_core_ops.to_goto_record = record_full_goto; | |
2251 | record_full_core_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2252 | } |
2253 | ||
2254 | /* Record log save-file format | |
2255 | Version 1 (never released) | |
2256 | ||
2257 | Header: | |
2258 | 4 bytes: magic number htonl(0x20090829). | |
2259 | NOTE: be sure to change whenever this file format changes! | |
2260 | ||
2261 | Records: | |
88d1aa9d MM |
2262 | record_full_end: |
2263 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2264 | record_full_reg: | |
2265 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2266 | 8 bytes: register id (network byte order). |
2267 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2268 | record_full_mem: |
2269 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2270 | 8 bytes: memory length (network byte order). |
2271 | 8 bytes: memory address (network byte order). | |
2272 | n bytes: memory value (n == memory length). | |
2273 | ||
2274 | Version 2 | |
2275 | 4 bytes: magic number netorder32(0x20091016). | |
2276 | NOTE: be sure to change whenever this file format changes! | |
2277 | ||
2278 | Records: | |
88d1aa9d MM |
2279 | record_full_end: |
2280 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2281 | 4 bytes: signal |
2282 | 4 bytes: instruction count | |
88d1aa9d MM |
2283 | record_full_reg: |
2284 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2285 | 4 bytes: register id (network byte order). |
2286 | n bytes: register value (n == actual register size). | |
2287 | (eg. 4 bytes for x86 general registers). | |
88d1aa9d MM |
2288 | record_full_mem: |
2289 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2290 | 4 bytes: memory length (network byte order). |
2291 | 8 bytes: memory address (network byte order). | |
2292 | n bytes: memory value (n == memory length). | |
2293 | ||
2294 | */ | |
2295 | ||
2296 | /* bfdcore_read -- read bytes from a core file section. */ | |
2297 | ||
2298 | static inline void | |
2299 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2300 | { | |
2301 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2302 | ||
2303 | if (ret) | |
2304 | *offset += len; | |
2305 | else | |
2306 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2307 | len, bfd_get_filename (obfd), | |
2308 | bfd_errmsg (bfd_get_error ())); | |
2309 | } | |
2310 | ||
2311 | static inline uint64_t | |
2312 | netorder64 (uint64_t input) | |
2313 | { | |
2314 | uint64_t ret; | |
2315 | ||
2316 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2317 | BFD_ENDIAN_BIG, input); | |
2318 | return ret; | |
2319 | } | |
2320 | ||
2321 | static inline uint32_t | |
2322 | netorder32 (uint32_t input) | |
2323 | { | |
2324 | uint32_t ret; | |
2325 | ||
2326 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2327 | BFD_ENDIAN_BIG, input); | |
2328 | return ret; | |
2329 | } | |
2330 | ||
2331 | static inline uint16_t | |
2332 | netorder16 (uint16_t input) | |
2333 | { | |
2334 | uint16_t ret; | |
2335 | ||
2336 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2337 | BFD_ENDIAN_BIG, input); | |
2338 | return ret; | |
2339 | } | |
2340 | ||
2341 | /* Restore the execution log from a core_bfd file. */ | |
2342 | static void | |
88d1aa9d | 2343 | record_full_restore (void) |
d02ed0bb MM |
2344 | { |
2345 | uint32_t magic; | |
2346 | struct cleanup *old_cleanups; | |
88d1aa9d | 2347 | struct record_full_entry *rec; |
d02ed0bb MM |
2348 | asection *osec; |
2349 | uint32_t osec_size; | |
2350 | int bfd_offset = 0; | |
2351 | struct regcache *regcache; | |
2352 | ||
2353 | /* We restore the execution log from the open core bfd, | |
2354 | if there is one. */ | |
2355 | if (core_bfd == NULL) | |
2356 | return; | |
2357 | ||
88d1aa9d MM |
2358 | /* "record_full_restore" can only be called when record list is empty. */ |
2359 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2360 | |
2361 | if (record_debug) | |
2362 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2363 | ||
2364 | /* Now need to find our special note section. */ | |
2365 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2366 | if (record_debug) | |
2367 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2368 | osec ? "succeeded" : "failed"); | |
2369 | if (osec == NULL) | |
2370 | return; | |
2371 | osec_size = bfd_section_size (core_bfd, osec); | |
2372 | if (record_debug) | |
2373 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); | |
2374 | ||
2375 | /* Check the magic code. */ | |
2376 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2377 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2378 | error (_("Version mis-match or file format error in core file %s."), |
2379 | bfd_get_filename (core_bfd)); | |
2380 | if (record_debug) | |
2381 | fprintf_unfiltered (gdb_stdlog, | |
2382 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2383 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2384 | phex_nz (netorder32 (magic), 4)); |
2385 | ||
88d1aa9d MM |
2386 | /* Restore the entries in recfd into record_full_arch_list_head and |
2387 | record_full_arch_list_tail. */ | |
2388 | record_full_arch_list_head = NULL; | |
2389 | record_full_arch_list_tail = NULL; | |
2390 | record_full_insn_num = 0; | |
2391 | old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb MM |
2392 | regcache = get_current_regcache (); |
2393 | ||
2394 | while (1) | |
2395 | { | |
2396 | uint8_t rectype; | |
2397 | uint32_t regnum, len, signal, count; | |
2398 | uint64_t addr; | |
2399 | ||
2400 | /* We are finished when offset reaches osec_size. */ | |
2401 | if (bfd_offset >= osec_size) | |
2402 | break; | |
2403 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
2404 | ||
2405 | switch (rectype) | |
2406 | { | |
88d1aa9d | 2407 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2408 | /* Get register number to regnum. */ |
2409 | bfdcore_read (core_bfd, osec, ®num, | |
2410 | sizeof (regnum), &bfd_offset); | |
2411 | regnum = netorder32 (regnum); | |
2412 | ||
88d1aa9d | 2413 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb MM |
2414 | |
2415 | /* Get val. */ | |
88d1aa9d | 2416 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2417 | rec->u.reg.len, &bfd_offset); |
2418 | ||
2419 | if (record_debug) | |
2420 | fprintf_unfiltered (gdb_stdlog, | |
2421 | " Reading register %d (1 " | |
2422 | "plus %lu plus %d bytes)\n", | |
2423 | rec->u.reg.num, | |
2424 | (unsigned long) sizeof (regnum), | |
2425 | rec->u.reg.len); | |
2426 | break; | |
2427 | ||
88d1aa9d | 2428 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2429 | /* Get len. */ |
2430 | bfdcore_read (core_bfd, osec, &len, | |
2431 | sizeof (len), &bfd_offset); | |
2432 | len = netorder32 (len); | |
2433 | ||
2434 | /* Get addr. */ | |
2435 | bfdcore_read (core_bfd, osec, &addr, | |
2436 | sizeof (addr), &bfd_offset); | |
2437 | addr = netorder64 (addr); | |
2438 | ||
88d1aa9d | 2439 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb MM |
2440 | |
2441 | /* Get val. */ | |
88d1aa9d | 2442 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2443 | rec->u.mem.len, &bfd_offset); |
2444 | ||
2445 | if (record_debug) | |
2446 | fprintf_unfiltered (gdb_stdlog, | |
2447 | " Reading memory %s (1 plus " | |
2448 | "%lu plus %lu plus %d bytes)\n", | |
2449 | paddress (get_current_arch (), | |
2450 | rec->u.mem.addr), | |
2451 | (unsigned long) sizeof (addr), | |
2452 | (unsigned long) sizeof (len), | |
2453 | rec->u.mem.len); | |
2454 | break; | |
2455 | ||
88d1aa9d MM |
2456 | case record_full_end: /* end */ |
2457 | rec = record_full_end_alloc (); | |
2458 | record_full_insn_num ++; | |
d02ed0bb MM |
2459 | |
2460 | /* Get signal value. */ | |
2461 | bfdcore_read (core_bfd, osec, &signal, | |
2462 | sizeof (signal), &bfd_offset); | |
2463 | signal = netorder32 (signal); | |
aead7601 | 2464 | rec->u.end.sigval = (enum gdb_signal) signal; |
d02ed0bb MM |
2465 | |
2466 | /* Get insn count. */ | |
2467 | bfdcore_read (core_bfd, osec, &count, | |
2468 | sizeof (count), &bfd_offset); | |
2469 | count = netorder32 (count); | |
2470 | rec->u.end.insn_num = count; | |
88d1aa9d | 2471 | record_full_insn_count = count + 1; |
d02ed0bb MM |
2472 | if (record_debug) |
2473 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2474 | " Reading record_full_end (1 + " |
d02ed0bb MM |
2475 | "%lu + %lu bytes), offset == %s\n", |
2476 | (unsigned long) sizeof (signal), | |
2477 | (unsigned long) sizeof (count), | |
2478 | paddress (get_current_arch (), | |
2479 | bfd_offset)); | |
2480 | break; | |
2481 | ||
2482 | default: | |
2483 | error (_("Bad entry type in core file %s."), | |
2484 | bfd_get_filename (core_bfd)); | |
2485 | break; | |
2486 | } | |
2487 | ||
2488 | /* Add rec to record arch list. */ | |
88d1aa9d | 2489 | record_full_arch_list_add (rec); |
d02ed0bb MM |
2490 | } |
2491 | ||
2492 | discard_cleanups (old_cleanups); | |
2493 | ||
88d1aa9d MM |
2494 | /* Add record_full_arch_list_head to the end of record list. */ |
2495 | record_full_first.next = record_full_arch_list_head; | |
2496 | record_full_arch_list_head->prev = &record_full_first; | |
2497 | record_full_arch_list_tail->next = NULL; | |
2498 | record_full_list = &record_full_first; | |
d02ed0bb | 2499 | |
88d1aa9d MM |
2500 | /* Update record_full_insn_max_num. */ |
2501 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2502 | { |
88d1aa9d | 2503 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2504 | warning (_("Auto increase record/replay buffer limit to %u."), |
88d1aa9d | 2505 | record_full_insn_max_num); |
d02ed0bb MM |
2506 | } |
2507 | ||
2508 | /* Succeeded. */ | |
2509 | printf_filtered (_("Restored records from core file %s.\n"), | |
2510 | bfd_get_filename (core_bfd)); | |
2511 | ||
08d72866 | 2512 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2513 | } |
2514 | ||
2515 | /* bfdcore_write -- write bytes into a core file section. */ | |
2516 | ||
2517 | static inline void | |
2518 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2519 | { | |
2520 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2521 | ||
2522 | if (ret) | |
2523 | *offset += len; | |
2524 | else | |
2525 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2526 | len, bfd_get_filename (obfd), | |
2527 | bfd_errmsg (bfd_get_error ())); | |
2528 | } | |
2529 | ||
2530 | /* Restore the execution log from a file. We use a modified elf | |
2531 | corefile format, with an extra section for our data. */ | |
2532 | ||
2533 | static void | |
88d1aa9d | 2534 | cmd_record_full_restore (char *args, int from_tty) |
d02ed0bb MM |
2535 | { |
2536 | core_file_command (args, from_tty); | |
88d1aa9d | 2537 | record_full_open (args, from_tty); |
d02ed0bb MM |
2538 | } |
2539 | ||
2540 | static void | |
88d1aa9d | 2541 | record_full_save_cleanups (void *data) |
d02ed0bb | 2542 | { |
19ba03f4 | 2543 | bfd *obfd = (bfd *) data; |
d02ed0bb MM |
2544 | char *pathname = xstrdup (bfd_get_filename (obfd)); |
2545 | ||
2546 | gdb_bfd_unref (obfd); | |
2547 | unlink (pathname); | |
2548 | xfree (pathname); | |
2549 | } | |
2550 | ||
2551 | /* Save the execution log to a file. We use a modified elf corefile | |
2552 | format, with an extra section for our data. */ | |
2553 | ||
2554 | static void | |
1390f529 | 2555 | record_full_save (struct target_ops *self, const char *recfilename) |
d02ed0bb | 2556 | { |
88d1aa9d | 2557 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2558 | uint32_t magic; |
2559 | struct regcache *regcache; | |
2560 | struct gdbarch *gdbarch; | |
2561 | struct cleanup *old_cleanups; | |
2562 | struct cleanup *set_cleanups; | |
2563 | bfd *obfd; | |
2564 | int save_size = 0; | |
2565 | asection *osec = NULL; | |
2566 | int bfd_offset = 0; | |
2567 | ||
2568 | /* Open the save file. */ | |
2569 | if (record_debug) | |
2570 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2571 | recfilename); | |
2572 | ||
2573 | /* Open the output file. */ | |
2574 | obfd = create_gcore_bfd (recfilename); | |
88d1aa9d | 2575 | old_cleanups = make_cleanup (record_full_save_cleanups, obfd); |
d02ed0bb | 2576 | |
88d1aa9d MM |
2577 | /* Save the current record entry to "cur_record_full_list". */ |
2578 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2579 | |
2580 | /* Get the values of regcache and gdbarch. */ | |
2581 | regcache = get_current_regcache (); | |
2582 | gdbarch = get_regcache_arch (regcache); | |
2583 | ||
2584 | /* Disable the GDB operation record. */ | |
25ea693b | 2585 | set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
2586 | |
2587 | /* Reverse execute to the begin of record list. */ | |
2588 | while (1) | |
2589 | { | |
2590 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2591 | if (record_full_list == &record_full_first) |
d02ed0bb MM |
2592 | break; |
2593 | ||
88d1aa9d | 2594 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2595 | |
88d1aa9d MM |
2596 | if (record_full_list->prev) |
2597 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2598 | } |
2599 | ||
2600 | /* Compute the size needed for the extra bfd section. */ | |
2601 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2602 | for (record_full_list = record_full_first.next; record_full_list; |
2603 | record_full_list = record_full_list->next) | |
2604 | switch (record_full_list->type) | |
d02ed0bb | 2605 | { |
88d1aa9d | 2606 | case record_full_end: |
d02ed0bb MM |
2607 | save_size += 1 + 4 + 4; |
2608 | break; | |
88d1aa9d MM |
2609 | case record_full_reg: |
2610 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2611 | break; |
88d1aa9d MM |
2612 | case record_full_mem: |
2613 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2614 | break; |
2615 | } | |
2616 | ||
2617 | /* Make the new bfd section. */ | |
2618 | osec = bfd_make_section_anyway_with_flags (obfd, "precord", | |
2619 | SEC_HAS_CONTENTS | |
2620 | | SEC_READONLY); | |
2621 | if (osec == NULL) | |
2622 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2623 | recfilename, | |
2624 | bfd_errmsg (bfd_get_error ())); | |
2625 | bfd_set_section_size (obfd, osec, save_size); | |
2626 | bfd_set_section_vma (obfd, osec, 0); | |
2627 | bfd_set_section_alignment (obfd, osec, 0); | |
2628 | bfd_section_lma (obfd, osec) = 0; | |
2629 | ||
2630 | /* Save corefile state. */ | |
2631 | write_gcore_file (obfd); | |
2632 | ||
2633 | /* Write out the record log. */ | |
2634 | /* Write the magic code. */ | |
88d1aa9d | 2635 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2636 | if (record_debug) |
2637 | fprintf_unfiltered (gdb_stdlog, | |
2638 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2639 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2640 | phex_nz (magic, 4)); |
2641 | bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset); | |
2642 | ||
2643 | /* Save the entries to recfd and forward execute to the end of | |
2644 | record list. */ | |
88d1aa9d | 2645 | record_full_list = &record_full_first; |
d02ed0bb MM |
2646 | while (1) |
2647 | { | |
2648 | /* Save entry. */ | |
88d1aa9d | 2649 | if (record_full_list != &record_full_first) |
d02ed0bb MM |
2650 | { |
2651 | uint8_t type; | |
2652 | uint32_t regnum, len, signal, count; | |
2653 | uint64_t addr; | |
2654 | ||
88d1aa9d | 2655 | type = record_full_list->type; |
d02ed0bb MM |
2656 | bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset); |
2657 | ||
88d1aa9d | 2658 | switch (record_full_list->type) |
d02ed0bb | 2659 | { |
88d1aa9d | 2660 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2661 | if (record_debug) |
2662 | fprintf_unfiltered (gdb_stdlog, | |
2663 | " Writing register %d (1 " | |
2664 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2665 | record_full_list->u.reg.num, |
d02ed0bb | 2666 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2667 | record_full_list->u.reg.len); |
d02ed0bb MM |
2668 | |
2669 | /* Write regnum. */ | |
88d1aa9d | 2670 | regnum = netorder32 (record_full_list->u.reg.num); |
d02ed0bb MM |
2671 | bfdcore_write (obfd, osec, ®num, |
2672 | sizeof (regnum), &bfd_offset); | |
2673 | ||
2674 | /* Write regval. */ | |
88d1aa9d MM |
2675 | bfdcore_write (obfd, osec, |
2676 | record_full_get_loc (record_full_list), | |
2677 | record_full_list->u.reg.len, &bfd_offset); | |
d02ed0bb MM |
2678 | break; |
2679 | ||
88d1aa9d | 2680 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2681 | if (record_debug) |
2682 | fprintf_unfiltered (gdb_stdlog, | |
2683 | " Writing memory %s (1 plus " | |
2684 | "%lu plus %lu plus %d bytes)\n", | |
2685 | paddress (gdbarch, | |
88d1aa9d | 2686 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2687 | (unsigned long) sizeof (addr), |
2688 | (unsigned long) sizeof (len), | |
88d1aa9d | 2689 | record_full_list->u.mem.len); |
d02ed0bb MM |
2690 | |
2691 | /* Write memlen. */ | |
88d1aa9d | 2692 | len = netorder32 (record_full_list->u.mem.len); |
d02ed0bb MM |
2693 | bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset); |
2694 | ||
2695 | /* Write memaddr. */ | |
88d1aa9d | 2696 | addr = netorder64 (record_full_list->u.mem.addr); |
d02ed0bb MM |
2697 | bfdcore_write (obfd, osec, &addr, |
2698 | sizeof (addr), &bfd_offset); | |
2699 | ||
2700 | /* Write memval. */ | |
88d1aa9d MM |
2701 | bfdcore_write (obfd, osec, |
2702 | record_full_get_loc (record_full_list), | |
2703 | record_full_list->u.mem.len, &bfd_offset); | |
d02ed0bb MM |
2704 | break; |
2705 | ||
88d1aa9d | 2706 | case record_full_end: |
d02ed0bb MM |
2707 | if (record_debug) |
2708 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2709 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2710 | "%lu + %lu bytes)\n", |
2711 | (unsigned long) sizeof (signal), | |
2712 | (unsigned long) sizeof (count)); | |
2713 | /* Write signal value. */ | |
88d1aa9d | 2714 | signal = netorder32 (record_full_list->u.end.sigval); |
d02ed0bb MM |
2715 | bfdcore_write (obfd, osec, &signal, |
2716 | sizeof (signal), &bfd_offset); | |
2717 | ||
2718 | /* Write insn count. */ | |
88d1aa9d | 2719 | count = netorder32 (record_full_list->u.end.insn_num); |
d02ed0bb MM |
2720 | bfdcore_write (obfd, osec, &count, |
2721 | sizeof (count), &bfd_offset); | |
2722 | break; | |
2723 | } | |
2724 | } | |
2725 | ||
2726 | /* Execute entry. */ | |
88d1aa9d | 2727 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2728 | |
88d1aa9d MM |
2729 | if (record_full_list->next) |
2730 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
2731 | else |
2732 | break; | |
2733 | } | |
2734 | ||
88d1aa9d | 2735 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2736 | while (1) |
2737 | { | |
2738 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2739 | if (record_full_list == cur_record_full_list) |
d02ed0bb MM |
2740 | break; |
2741 | ||
88d1aa9d | 2742 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2743 | |
88d1aa9d MM |
2744 | if (record_full_list->prev) |
2745 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2746 | } |
2747 | ||
2748 | do_cleanups (set_cleanups); | |
2749 | gdb_bfd_unref (obfd); | |
2750 | discard_cleanups (old_cleanups); | |
2751 | ||
2752 | /* Succeeded. */ | |
2753 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2754 | recfilename); | |
2755 | } | |
2756 | ||
88d1aa9d | 2757 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2758 | depending on DIR) to the given entry, changing the program state |
2759 | correspondingly. */ | |
2760 | ||
2761 | static void | |
88d1aa9d MM |
2762 | record_full_goto_insn (struct record_full_entry *entry, |
2763 | enum exec_direction_kind dir) | |
d02ed0bb | 2764 | { |
25ea693b | 2765 | struct cleanup *set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
2766 | struct regcache *regcache = get_current_regcache (); |
2767 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2768 | ||
2769 | /* Assume everything is valid: we will hit the entry, | |
2770 | and we will not hit the end of the recording. */ | |
2771 | ||
2772 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2773 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2774 | |
2775 | do | |
2776 | { | |
88d1aa9d | 2777 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2778 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2779 | record_full_list = record_full_list->prev; |
d02ed0bb | 2780 | else |
88d1aa9d MM |
2781 | record_full_list = record_full_list->next; |
2782 | } while (record_full_list != entry); | |
d02ed0bb MM |
2783 | do_cleanups (set_cleanups); |
2784 | } | |
2785 | ||
2786 | /* Alias for "target record-full". */ | |
2787 | ||
2788 | static void | |
88d1aa9d | 2789 | cmd_record_full_start (char *args, int from_tty) |
d02ed0bb MM |
2790 | { |
2791 | execute_command ("target record-full", from_tty); | |
2792 | } | |
2793 | ||
2794 | static void | |
88d1aa9d MM |
2795 | set_record_full_insn_max_num (char *args, int from_tty, |
2796 | struct cmd_list_element *c) | |
d02ed0bb | 2797 | { |
7ee70bf5 | 2798 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2799 | { |
88d1aa9d MM |
2800 | /* Count down record_full_insn_num while releasing records from list. */ |
2801 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2802 | { |
88d1aa9d MM |
2803 | record_full_list_release_first (); |
2804 | record_full_insn_num--; | |
d02ed0bb MM |
2805 | } |
2806 | } | |
2807 | } | |
2808 | ||
2809 | /* The "set record full" command. */ | |
2810 | ||
2811 | static void | |
2812 | set_record_full_command (char *args, int from_tty) | |
2813 | { | |
2814 | printf_unfiltered (_("\"set record full\" must be followed " | |
2815 | "by an apporpriate subcommand.\n")); | |
2816 | help_list (set_record_full_cmdlist, "set record full ", all_commands, | |
2817 | gdb_stdout); | |
2818 | } | |
2819 | ||
2820 | /* The "show record full" command. */ | |
2821 | ||
2822 | static void | |
2823 | show_record_full_command (char *args, int from_tty) | |
2824 | { | |
2825 | cmd_show_list (show_record_full_cmdlist, from_tty, ""); | |
2826 | } | |
2827 | ||
2828 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
2829 | extern initialize_file_ftype _initialize_record_full; | |
2830 | ||
2831 | void | |
2832 | _initialize_record_full (void) | |
2833 | { | |
2834 | struct cmd_list_element *c; | |
2835 | ||
88d1aa9d MM |
2836 | /* Init record_full_first. */ |
2837 | record_full_first.prev = NULL; | |
2838 | record_full_first.next = NULL; | |
2839 | record_full_first.type = record_full_end; | |
d02ed0bb | 2840 | |
88d1aa9d MM |
2841 | init_record_full_ops (); |
2842 | add_target (&record_full_ops); | |
2843 | add_deprecated_target_alias (&record_full_ops, "record"); | |
2844 | init_record_full_core_ops (); | |
2845 | add_target (&record_full_core_ops); | |
d02ed0bb | 2846 | |
88d1aa9d | 2847 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb MM |
2848 | _("Start full execution recording."), &record_full_cmdlist, |
2849 | "record full ", 0, &record_cmdlist); | |
2850 | ||
88d1aa9d | 2851 | c = add_cmd ("restore", class_obscure, cmd_record_full_restore, |
d02ed0bb MM |
2852 | _("Restore the execution log from a file.\n\ |
2853 | Argument is filename. File must be created with 'record save'."), | |
2854 | &record_full_cmdlist); | |
2855 | set_cmd_completer (c, filename_completer); | |
2856 | ||
2857 | /* Deprecate the old version without "full" prefix. */ | |
2858 | c = add_alias_cmd ("restore", "full restore", class_obscure, 1, | |
2859 | &record_cmdlist); | |
2860 | set_cmd_completer (c, filename_completer); | |
2861 | deprecate_cmd (c, "record full restore"); | |
2862 | ||
2863 | add_prefix_cmd ("full", class_support, set_record_full_command, | |
2864 | _("Set record options"), &set_record_full_cmdlist, | |
2865 | "set record full ", 0, &set_record_cmdlist); | |
2866 | ||
2867 | add_prefix_cmd ("full", class_support, show_record_full_command, | |
2868 | _("Show record options"), &show_record_full_cmdlist, | |
2869 | "show record full ", 0, &show_record_cmdlist); | |
2870 | ||
2871 | /* Record instructions number limit command. */ | |
2872 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
88d1aa9d | 2873 | &record_full_stop_at_limit, _("\ |
d02ed0bb MM |
2874 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2875 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2876 | _("Default is ON.\n\ | |
2877 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2878 | When OFF, if the record/replay buffer becomes full,\n\ | |
2879 | delete the oldest recorded instruction to make room for each new one."), | |
2880 | NULL, NULL, | |
2881 | &set_record_full_cmdlist, &show_record_full_cmdlist); | |
2882 | ||
2883 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2884 | &set_record_cmdlist); | |
2885 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2886 | ||
2887 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2888 | &show_record_cmdlist); | |
2889 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2890 | ||
88d1aa9d MM |
2891 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
2892 | &record_full_insn_max_num, | |
d02ed0bb MM |
2893 | _("Set record/replay buffer limit."), |
2894 | _("Show record/replay buffer limit."), _("\ | |
2895 | Set the maximum number of instructions to be stored in the\n\ | |
f81d1120 PA |
2896 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2897 | limit. Default is 200000."), | |
88d1aa9d | 2898 | set_record_full_insn_max_num, |
d02ed0bb MM |
2899 | NULL, &set_record_full_cmdlist, |
2900 | &show_record_full_cmdlist); | |
2901 | ||
2902 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2903 | &set_record_cmdlist); | |
2904 | deprecate_cmd (c, "set record full insn-number-max"); | |
2905 | ||
2906 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2907 | &show_record_cmdlist); | |
2908 | deprecate_cmd (c, "show record full insn-number-max"); | |
2909 | ||
88d1aa9d | 2910 | add_setshow_boolean_cmd ("memory-query", no_class, |
25ea693b | 2911 | &record_full_memory_query, _("\ |
d02ed0bb MM |
2912 | Set whether query if PREC cannot record memory change of next instruction."), |
2913 | _("\ | |
2914 | Show whether query if PREC cannot record memory change of next instruction."), | |
2915 | _("\ | |
2916 | Default is OFF.\n\ | |
2917 | When ON, query if PREC cannot record memory change of next instruction."), | |
2918 | NULL, NULL, | |
88d1aa9d MM |
2919 | &set_record_full_cmdlist, |
2920 | &show_record_full_cmdlist); | |
d02ed0bb MM |
2921 | |
2922 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2923 | &set_record_cmdlist); | |
2924 | deprecate_cmd (c, "set record full memory-query"); | |
2925 | ||
2926 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2927 | &show_record_cmdlist); | |
2928 | deprecate_cmd (c, "show record full memory-query"); | |
2929 | } |