Commit | Line | Data |
---|---|---|
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" |
bef155c3 | 38 | #include "common/gdb_unlinker.h" |
d02ed0bb MM |
39 | |
40 | #include <signal.h> | |
41 | ||
42 | /* This module implements "target record-full", also known as "process | |
43 | record and replay". This target sits on top of a "normal" target | |
44 | (a target that "has execution"), and provides a record and replay | |
45 | functionality, including reverse debugging. | |
46 | ||
47 | Target record has two modes: recording, and replaying. | |
48 | ||
49 | In record mode, we intercept the to_resume and to_wait methods. | |
50 | Whenever gdb resumes the target, we run the target in single step | |
51 | mode, and we build up an execution log in which, for each executed | |
52 | instruction, we record all changes in memory and register state. | |
53 | This is invisible to the user, to whom it just looks like an | |
54 | ordinary debugging session (except for performance degredation). | |
55 | ||
56 | In replay mode, instead of actually letting the inferior run as a | |
57 | process, we simulate its execution by playing back the recorded | |
58 | execution log. For each instruction in the log, we simulate the | |
59 | instruction's side effects by duplicating the changes that it would | |
60 | have made on memory and registers. */ | |
61 | ||
88d1aa9d | 62 | #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000 |
d02ed0bb | 63 | |
88d1aa9d MM |
64 | #define RECORD_FULL_IS_REPLAY \ |
65 | (record_full_list->next || execution_direction == EXEC_REVERSE) | |
d02ed0bb | 66 | |
88d1aa9d | 67 | #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016) |
d02ed0bb MM |
68 | |
69 | /* These are the core structs of the process record functionality. | |
70 | ||
88d1aa9d MM |
71 | A record_full_entry is a record of the value change of a register |
72 | ("record_full_reg") or a part of memory ("record_full_mem"). And each | |
73 | instruction must have a struct record_full_entry ("record_full_end") | |
74 | that indicates that this is the last struct record_full_entry of this | |
d02ed0bb MM |
75 | instruction. |
76 | ||
88d1aa9d MM |
77 | Each struct record_full_entry is linked to "record_full_list" by "prev" |
78 | and "next" pointers. */ | |
d02ed0bb | 79 | |
88d1aa9d | 80 | struct record_full_mem_entry |
d02ed0bb MM |
81 | { |
82 | CORE_ADDR addr; | |
83 | int len; | |
84 | /* Set this flag if target memory for this entry | |
85 | can no longer be accessed. */ | |
86 | int mem_entry_not_accessible; | |
87 | union | |
88 | { | |
89 | gdb_byte *ptr; | |
90 | gdb_byte buf[sizeof (gdb_byte *)]; | |
91 | } u; | |
92 | }; | |
93 | ||
88d1aa9d | 94 | struct record_full_reg_entry |
d02ed0bb MM |
95 | { |
96 | unsigned short num; | |
97 | unsigned short len; | |
98 | union | |
99 | { | |
100 | gdb_byte *ptr; | |
101 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
102 | } u; | |
103 | }; | |
104 | ||
88d1aa9d | 105 | struct record_full_end_entry |
d02ed0bb MM |
106 | { |
107 | enum gdb_signal sigval; | |
108 | ULONGEST insn_num; | |
109 | }; | |
110 | ||
88d1aa9d | 111 | enum record_full_type |
d02ed0bb | 112 | { |
88d1aa9d MM |
113 | record_full_end = 0, |
114 | record_full_reg, | |
115 | record_full_mem | |
d02ed0bb MM |
116 | }; |
117 | ||
118 | /* This is the data structure that makes up the execution log. | |
119 | ||
120 | The execution log consists of a single linked list of entries | |
88d1aa9d | 121 | of type "struct record_full_entry". It is doubly linked so that it |
d02ed0bb MM |
122 | can be traversed in either direction. |
123 | ||
124 | The start of the list is anchored by a struct called | |
88d1aa9d MM |
125 | "record_full_first". The pointer "record_full_list" either points |
126 | to the last entry that was added to the list (in record mode), or to | |
127 | the next entry in the list that will be executed (in replay mode). | |
d02ed0bb | 128 | |
88d1aa9d MM |
129 | Each list element (struct record_full_entry), in addition to next |
130 | and prev pointers, consists of a union of three entry types: mem, | |
131 | reg, and end. A field called "type" determines which entry type is | |
d02ed0bb MM |
132 | represented by a given list element. |
133 | ||
134 | Each instruction that is added to the execution log is represented | |
135 | by a variable number of list elements ('entries'). The instruction | |
136 | will have one "reg" entry for each register that is changed by | |
137 | executing the instruction (including the PC in every case). It | |
138 | will also have one "mem" entry for each memory change. Finally, | |
139 | each instruction will have an "end" entry that separates it from | |
140 | the changes associated with the next instruction. */ | |
141 | ||
88d1aa9d | 142 | struct record_full_entry |
d02ed0bb | 143 | { |
88d1aa9d MM |
144 | struct record_full_entry *prev; |
145 | struct record_full_entry *next; | |
146 | enum record_full_type type; | |
d02ed0bb MM |
147 | union |
148 | { | |
149 | /* reg */ | |
88d1aa9d | 150 | struct record_full_reg_entry reg; |
d02ed0bb | 151 | /* mem */ |
88d1aa9d | 152 | struct record_full_mem_entry mem; |
d02ed0bb | 153 | /* end */ |
88d1aa9d | 154 | struct record_full_end_entry end; |
d02ed0bb MM |
155 | } u; |
156 | }; | |
157 | ||
158 | /* If true, query if PREC cannot record memory | |
159 | change of next instruction. */ | |
25ea693b | 160 | int record_full_memory_query = 0; |
d02ed0bb | 161 | |
88d1aa9d | 162 | struct record_full_core_buf_entry |
d02ed0bb | 163 | { |
88d1aa9d | 164 | struct record_full_core_buf_entry *prev; |
d02ed0bb MM |
165 | struct target_section *p; |
166 | bfd_byte *buf; | |
167 | }; | |
168 | ||
169 | /* Record buf with core target. */ | |
88d1aa9d MM |
170 | static gdb_byte *record_full_core_regbuf = NULL; |
171 | static struct target_section *record_full_core_start; | |
172 | static struct target_section *record_full_core_end; | |
173 | static struct record_full_core_buf_entry *record_full_core_buf_list = NULL; | |
d02ed0bb MM |
174 | |
175 | /* The following variables are used for managing the linked list that | |
176 | represents the execution log. | |
177 | ||
88d1aa9d MM |
178 | record_full_first is the anchor that holds down the beginning of |
179 | the list. | |
d02ed0bb | 180 | |
88d1aa9d | 181 | record_full_list serves two functions: |
d02ed0bb MM |
182 | 1) In record mode, it anchors the end of the list. |
183 | 2) In replay mode, it traverses the list and points to | |
184 | the next instruction that must be emulated. | |
185 | ||
88d1aa9d MM |
186 | record_full_arch_list_head and record_full_arch_list_tail are used |
187 | to manage a separate list, which is used to build up the change | |
188 | elements of the currently executing instruction during record mode. | |
189 | When this instruction has been completely annotated in the "arch | |
190 | list", it will be appended to the main execution log. */ | |
d02ed0bb | 191 | |
88d1aa9d MM |
192 | static struct record_full_entry record_full_first; |
193 | static struct record_full_entry *record_full_list = &record_full_first; | |
194 | static struct record_full_entry *record_full_arch_list_head = NULL; | |
195 | static struct record_full_entry *record_full_arch_list_tail = NULL; | |
d02ed0bb | 196 | |
88d1aa9d MM |
197 | /* 1 ask user. 0 auto delete the last struct record_full_entry. */ |
198 | static int record_full_stop_at_limit = 1; | |
d02ed0bb | 199 | /* Maximum allowed number of insns in execution log. */ |
88d1aa9d MM |
200 | static unsigned int record_full_insn_max_num |
201 | = DEFAULT_RECORD_FULL_INSN_MAX_NUM; | |
d02ed0bb | 202 | /* Actual count of insns presently in execution log. */ |
7ee70bf5 | 203 | static unsigned int record_full_insn_num = 0; |
d02ed0bb MM |
204 | /* Count of insns logged so far (may be larger |
205 | than count of insns presently in execution log). */ | |
88d1aa9d | 206 | static ULONGEST record_full_insn_count; |
d02ed0bb MM |
207 | |
208 | /* The target_ops of process record. */ | |
88d1aa9d MM |
209 | static struct target_ops record_full_ops; |
210 | static struct target_ops record_full_core_ops; | |
d02ed0bb | 211 | |
8213266a PA |
212 | /* See record-full.h. */ |
213 | ||
214 | int | |
215 | record_full_is_used (void) | |
216 | { | |
217 | struct target_ops *t; | |
218 | ||
219 | t = find_record_target (); | |
220 | return (t == &record_full_ops | |
221 | || t == &record_full_core_ops); | |
222 | } | |
223 | ||
224 | ||
d02ed0bb MM |
225 | /* Command lists for "set/show record full". */ |
226 | static struct cmd_list_element *set_record_full_cmdlist; | |
227 | static struct cmd_list_element *show_record_full_cmdlist; | |
228 | ||
229 | /* Command list for "record full". */ | |
230 | static struct cmd_list_element *record_full_cmdlist; | |
231 | ||
88d1aa9d MM |
232 | static void record_full_goto_insn (struct record_full_entry *entry, |
233 | enum exec_direction_kind dir); | |
1390f529 TT |
234 | static void record_full_save (struct target_ops *self, |
235 | const char *recfilename); | |
88d1aa9d MM |
236 | |
237 | /* Alloc and free functions for record_full_reg, record_full_mem, and | |
238 | record_full_end entries. */ | |
239 | ||
240 | /* Alloc a record_full_reg record entry. */ | |
241 | ||
242 | static inline struct record_full_entry * | |
243 | record_full_reg_alloc (struct regcache *regcache, int regnum) | |
244 | { | |
245 | struct record_full_entry *rec; | |
d02ed0bb MM |
246 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
247 | ||
8d749320 | 248 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 249 | rec->type = record_full_reg; |
d02ed0bb MM |
250 | rec->u.reg.num = regnum; |
251 | rec->u.reg.len = register_size (gdbarch, regnum); | |
252 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
253 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
254 | ||
255 | return rec; | |
256 | } | |
257 | ||
88d1aa9d | 258 | /* Free a record_full_reg record entry. */ |
d02ed0bb MM |
259 | |
260 | static inline void | |
88d1aa9d | 261 | record_full_reg_release (struct record_full_entry *rec) |
d02ed0bb | 262 | { |
88d1aa9d | 263 | gdb_assert (rec->type == record_full_reg); |
d02ed0bb MM |
264 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
265 | xfree (rec->u.reg.u.ptr); | |
266 | xfree (rec); | |
267 | } | |
268 | ||
88d1aa9d | 269 | /* Alloc a record_full_mem record entry. */ |
d02ed0bb | 270 | |
88d1aa9d MM |
271 | static inline struct record_full_entry * |
272 | record_full_mem_alloc (CORE_ADDR addr, int len) | |
d02ed0bb | 273 | { |
88d1aa9d | 274 | struct record_full_entry *rec; |
d02ed0bb | 275 | |
8d749320 | 276 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 277 | rec->type = record_full_mem; |
d02ed0bb MM |
278 | rec->u.mem.addr = addr; |
279 | rec->u.mem.len = len; | |
280 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
281 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
282 | ||
283 | return rec; | |
284 | } | |
285 | ||
88d1aa9d | 286 | /* Free a record_full_mem record entry. */ |
d02ed0bb MM |
287 | |
288 | static inline void | |
88d1aa9d | 289 | record_full_mem_release (struct record_full_entry *rec) |
d02ed0bb | 290 | { |
88d1aa9d | 291 | gdb_assert (rec->type == record_full_mem); |
d02ed0bb MM |
292 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
293 | xfree (rec->u.mem.u.ptr); | |
294 | xfree (rec); | |
295 | } | |
296 | ||
88d1aa9d | 297 | /* Alloc a record_full_end record entry. */ |
d02ed0bb | 298 | |
88d1aa9d MM |
299 | static inline struct record_full_entry * |
300 | record_full_end_alloc (void) | |
d02ed0bb | 301 | { |
88d1aa9d | 302 | struct record_full_entry *rec; |
d02ed0bb | 303 | |
8d749320 | 304 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 305 | rec->type = record_full_end; |
d02ed0bb MM |
306 | |
307 | return rec; | |
308 | } | |
309 | ||
88d1aa9d | 310 | /* Free a record_full_end record entry. */ |
d02ed0bb MM |
311 | |
312 | static inline void | |
88d1aa9d | 313 | record_full_end_release (struct record_full_entry *rec) |
d02ed0bb MM |
314 | { |
315 | xfree (rec); | |
316 | } | |
317 | ||
318 | /* Free one record entry, any type. | |
319 | Return entry->type, in case caller wants to know. */ | |
320 | ||
88d1aa9d MM |
321 | static inline enum record_full_type |
322 | record_full_entry_release (struct record_full_entry *rec) | |
d02ed0bb | 323 | { |
88d1aa9d | 324 | enum record_full_type type = rec->type; |
d02ed0bb MM |
325 | |
326 | switch (type) { | |
88d1aa9d MM |
327 | case record_full_reg: |
328 | record_full_reg_release (rec); | |
d02ed0bb | 329 | break; |
88d1aa9d MM |
330 | case record_full_mem: |
331 | record_full_mem_release (rec); | |
d02ed0bb | 332 | break; |
88d1aa9d MM |
333 | case record_full_end: |
334 | record_full_end_release (rec); | |
d02ed0bb MM |
335 | break; |
336 | } | |
337 | return type; | |
338 | } | |
339 | ||
340 | /* Free all record entries in list pointed to by REC. */ | |
341 | ||
342 | static void | |
88d1aa9d | 343 | record_full_list_release (struct record_full_entry *rec) |
d02ed0bb MM |
344 | { |
345 | if (!rec) | |
346 | return; | |
347 | ||
348 | while (rec->next) | |
349 | rec = rec->next; | |
350 | ||
351 | while (rec->prev) | |
352 | { | |
353 | rec = rec->prev; | |
88d1aa9d | 354 | record_full_entry_release (rec->next); |
d02ed0bb MM |
355 | } |
356 | ||
88d1aa9d | 357 | if (rec == &record_full_first) |
d02ed0bb | 358 | { |
88d1aa9d MM |
359 | record_full_insn_num = 0; |
360 | record_full_first.next = NULL; | |
d02ed0bb MM |
361 | } |
362 | else | |
88d1aa9d | 363 | record_full_entry_release (rec); |
d02ed0bb MM |
364 | } |
365 | ||
366 | /* Free all record entries forward of the given list position. */ | |
367 | ||
368 | static void | |
88d1aa9d | 369 | record_full_list_release_following (struct record_full_entry *rec) |
d02ed0bb | 370 | { |
88d1aa9d | 371 | struct record_full_entry *tmp = rec->next; |
d02ed0bb MM |
372 | |
373 | rec->next = NULL; | |
374 | while (tmp) | |
375 | { | |
376 | rec = tmp->next; | |
88d1aa9d | 377 | if (record_full_entry_release (tmp) == record_full_end) |
d02ed0bb | 378 | { |
88d1aa9d MM |
379 | record_full_insn_num--; |
380 | record_full_insn_count--; | |
d02ed0bb MM |
381 | } |
382 | tmp = rec; | |
383 | } | |
384 | } | |
385 | ||
386 | /* Delete the first instruction from the beginning of the log, to make | |
387 | room for adding a new instruction at the end of the log. | |
388 | ||
88d1aa9d | 389 | Note -- this function does not modify record_full_insn_num. */ |
d02ed0bb MM |
390 | |
391 | static void | |
88d1aa9d | 392 | record_full_list_release_first (void) |
d02ed0bb | 393 | { |
88d1aa9d | 394 | struct record_full_entry *tmp; |
d02ed0bb | 395 | |
88d1aa9d | 396 | if (!record_full_first.next) |
d02ed0bb MM |
397 | return; |
398 | ||
88d1aa9d | 399 | /* Loop until a record_full_end. */ |
d02ed0bb MM |
400 | while (1) |
401 | { | |
88d1aa9d MM |
402 | /* Cut record_full_first.next out of the linked list. */ |
403 | tmp = record_full_first.next; | |
404 | record_full_first.next = tmp->next; | |
405 | tmp->next->prev = &record_full_first; | |
d02ed0bb MM |
406 | |
407 | /* tmp is now isolated, and can be deleted. */ | |
88d1aa9d MM |
408 | if (record_full_entry_release (tmp) == record_full_end) |
409 | break; /* End loop at first record_full_end. */ | |
d02ed0bb | 410 | |
88d1aa9d | 411 | if (!record_full_first.next) |
d02ed0bb | 412 | { |
88d1aa9d | 413 | gdb_assert (record_full_insn_num == 1); |
d02ed0bb MM |
414 | break; /* End loop when list is empty. */ |
415 | } | |
416 | } | |
417 | } | |
418 | ||
88d1aa9d | 419 | /* Add a struct record_full_entry to record_full_arch_list. */ |
d02ed0bb MM |
420 | |
421 | static void | |
88d1aa9d | 422 | record_full_arch_list_add (struct record_full_entry *rec) |
d02ed0bb MM |
423 | { |
424 | if (record_debug > 1) | |
425 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 426 | "Process record: record_full_arch_list_add %s.\n", |
d02ed0bb MM |
427 | host_address_to_string (rec)); |
428 | ||
88d1aa9d | 429 | if (record_full_arch_list_tail) |
d02ed0bb | 430 | { |
88d1aa9d MM |
431 | record_full_arch_list_tail->next = rec; |
432 | rec->prev = record_full_arch_list_tail; | |
433 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
434 | } |
435 | else | |
436 | { | |
88d1aa9d MM |
437 | record_full_arch_list_head = rec; |
438 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
439 | } |
440 | } | |
441 | ||
442 | /* Return the value storage location of a record entry. */ | |
443 | static inline gdb_byte * | |
88d1aa9d | 444 | record_full_get_loc (struct record_full_entry *rec) |
d02ed0bb MM |
445 | { |
446 | switch (rec->type) { | |
88d1aa9d | 447 | case record_full_mem: |
d02ed0bb MM |
448 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
449 | return rec->u.mem.u.ptr; | |
450 | else | |
451 | return rec->u.mem.u.buf; | |
88d1aa9d | 452 | case record_full_reg: |
d02ed0bb MM |
453 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
454 | return rec->u.reg.u.ptr; | |
455 | else | |
456 | return rec->u.reg.u.buf; | |
88d1aa9d | 457 | case record_full_end: |
d02ed0bb | 458 | default: |
88d1aa9d | 459 | gdb_assert_not_reached ("unexpected record_full_entry type"); |
d02ed0bb MM |
460 | return NULL; |
461 | } | |
462 | } | |
463 | ||
88d1aa9d | 464 | /* Record the value of a register NUM to record_full_arch_list. */ |
d02ed0bb MM |
465 | |
466 | int | |
25ea693b | 467 | record_full_arch_list_add_reg (struct regcache *regcache, int regnum) |
d02ed0bb | 468 | { |
88d1aa9d | 469 | struct record_full_entry *rec; |
d02ed0bb MM |
470 | |
471 | if (record_debug > 1) | |
472 | fprintf_unfiltered (gdb_stdlog, | |
473 | "Process record: add register num = %d to " | |
474 | "record list.\n", | |
475 | regnum); | |
476 | ||
88d1aa9d | 477 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 478 | |
88d1aa9d | 479 | regcache_raw_read (regcache, regnum, record_full_get_loc (rec)); |
d02ed0bb | 480 | |
88d1aa9d | 481 | record_full_arch_list_add (rec); |
d02ed0bb MM |
482 | |
483 | return 0; | |
484 | } | |
485 | ||
486 | /* Record the value of a region of memory whose address is ADDR and | |
88d1aa9d | 487 | length is LEN to record_full_arch_list. */ |
d02ed0bb MM |
488 | |
489 | int | |
25ea693b | 490 | record_full_arch_list_add_mem (CORE_ADDR addr, int len) |
d02ed0bb | 491 | { |
88d1aa9d | 492 | struct record_full_entry *rec; |
d02ed0bb MM |
493 | |
494 | if (record_debug > 1) | |
495 | fprintf_unfiltered (gdb_stdlog, | |
496 | "Process record: add mem addr = %s len = %d to " | |
497 | "record list.\n", | |
498 | paddress (target_gdbarch (), addr), len); | |
499 | ||
500 | if (!addr) /* FIXME: Why? Some arch must permit it... */ | |
501 | return 0; | |
502 | ||
88d1aa9d | 503 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb | 504 | |
88d1aa9d MM |
505 | if (record_read_memory (target_gdbarch (), addr, |
506 | record_full_get_loc (rec), len)) | |
d02ed0bb | 507 | { |
88d1aa9d | 508 | record_full_mem_release (rec); |
d02ed0bb MM |
509 | return -1; |
510 | } | |
511 | ||
88d1aa9d | 512 | record_full_arch_list_add (rec); |
d02ed0bb MM |
513 | |
514 | return 0; | |
515 | } | |
516 | ||
88d1aa9d MM |
517 | /* Add a record_full_end type struct record_full_entry to |
518 | record_full_arch_list. */ | |
d02ed0bb MM |
519 | |
520 | int | |
25ea693b | 521 | record_full_arch_list_add_end (void) |
d02ed0bb | 522 | { |
88d1aa9d | 523 | struct record_full_entry *rec; |
d02ed0bb MM |
524 | |
525 | if (record_debug > 1) | |
526 | fprintf_unfiltered (gdb_stdlog, | |
527 | "Process record: add end to arch list.\n"); | |
528 | ||
88d1aa9d | 529 | rec = record_full_end_alloc (); |
d02ed0bb | 530 | rec->u.end.sigval = GDB_SIGNAL_0; |
88d1aa9d | 531 | rec->u.end.insn_num = ++record_full_insn_count; |
d02ed0bb | 532 | |
88d1aa9d | 533 | record_full_arch_list_add (rec); |
d02ed0bb MM |
534 | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static void | |
651ce16a | 539 | record_full_check_insn_num (void) |
d02ed0bb | 540 | { |
7ee70bf5 | 541 | if (record_full_insn_num == record_full_insn_max_num) |
d02ed0bb | 542 | { |
7ee70bf5 PA |
543 | /* Ask user what to do. */ |
544 | if (record_full_stop_at_limit) | |
d02ed0bb | 545 | { |
651ce16a | 546 | if (!yquery (_("Do you want to auto delete previous execution " |
7ee70bf5 | 547 | "log entries when record/replay buffer becomes " |
651ce16a | 548 | "full (record full stop-at-limit)?"))) |
7ee70bf5 | 549 | error (_("Process record: stopped by user.")); |
651ce16a | 550 | record_full_stop_at_limit = 0; |
d02ed0bb MM |
551 | } |
552 | } | |
553 | } | |
554 | ||
555 | static void | |
88d1aa9d | 556 | record_full_arch_list_cleanups (void *ignore) |
d02ed0bb | 557 | { |
88d1aa9d | 558 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
559 | } |
560 | ||
561 | /* Before inferior step (when GDB record the running message, inferior | |
562 | only can step), GDB will call this function to record the values to | |
88d1aa9d | 563 | record_full_list. This function will call gdbarch_process_record to |
d02ed0bb | 564 | record the running message of inferior and set them to |
88d1aa9d | 565 | record_full_arch_list, and add it to record_full_list. */ |
d02ed0bb MM |
566 | |
567 | static int | |
88d1aa9d | 568 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
569 | { |
570 | int ret; | |
571 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
88d1aa9d MM |
572 | struct cleanup *old_cleanups |
573 | = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb | 574 | |
88d1aa9d MM |
575 | record_full_arch_list_head = NULL; |
576 | record_full_arch_list_tail = NULL; | |
d02ed0bb | 577 | |
88d1aa9d | 578 | /* Check record_full_insn_num. */ |
651ce16a | 579 | record_full_check_insn_num (); |
d02ed0bb MM |
580 | |
581 | /* If gdb sends a signal value to target_resume, | |
582 | save it in the 'end' field of the previous instruction. | |
583 | ||
584 | Maybe process record should record what really happened, | |
585 | rather than what gdb pretends has happened. | |
586 | ||
587 | So if Linux delivered the signal to the child process during | |
588 | the record mode, we will record it and deliver it again in | |
589 | the replay mode. | |
590 | ||
591 | If user says "ignore this signal" during the record mode, then | |
592 | it will be ignored again during the replay mode (no matter if | |
593 | the user says something different, like "deliver this signal" | |
594 | during the replay mode). | |
595 | ||
596 | User should understand that nothing he does during the replay | |
597 | mode will change the behavior of the child. If he tries, | |
598 | then that is a user error. | |
599 | ||
600 | But we should still deliver the signal to gdb during the replay, | |
601 | if we delivered it during the recording. Therefore we should | |
88d1aa9d MM |
602 | record the signal during record_full_wait, not |
603 | record_full_resume. */ | |
604 | if (record_full_list != &record_full_first) /* FIXME better way to check */ | |
d02ed0bb | 605 | { |
88d1aa9d MM |
606 | gdb_assert (record_full_list->type == record_full_end); |
607 | record_full_list->u.end.sigval = signal; | |
d02ed0bb MM |
608 | } |
609 | ||
610 | if (signal == GDB_SIGNAL_0 | |
611 | || !gdbarch_process_record_signal_p (gdbarch)) | |
612 | ret = gdbarch_process_record (gdbarch, | |
613 | regcache, | |
614 | regcache_read_pc (regcache)); | |
615 | else | |
616 | ret = gdbarch_process_record_signal (gdbarch, | |
617 | regcache, | |
618 | signal); | |
619 | ||
620 | if (ret > 0) | |
621 | error (_("Process record: inferior program stopped.")); | |
622 | if (ret < 0) | |
623 | error (_("Process record: failed to record execution log.")); | |
624 | ||
625 | discard_cleanups (old_cleanups); | |
626 | ||
88d1aa9d MM |
627 | record_full_list->next = record_full_arch_list_head; |
628 | record_full_arch_list_head->prev = record_full_list; | |
629 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 630 | |
7ee70bf5 | 631 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 632 | record_full_list_release_first (); |
d02ed0bb | 633 | else |
88d1aa9d | 634 | record_full_insn_num++; |
d02ed0bb MM |
635 | |
636 | return 1; | |
637 | } | |
638 | ||
88d1aa9d | 639 | struct record_full_message_args { |
d02ed0bb MM |
640 | struct regcache *regcache; |
641 | enum gdb_signal signal; | |
642 | }; | |
643 | ||
644 | static int | |
88d1aa9d | 645 | record_full_message_wrapper (void *args) |
d02ed0bb | 646 | { |
19ba03f4 SM |
647 | struct record_full_message_args *record_full_args |
648 | = (struct record_full_message_args *) args; | |
d02ed0bb | 649 | |
88d1aa9d MM |
650 | return record_full_message (record_full_args->regcache, |
651 | record_full_args->signal); | |
d02ed0bb MM |
652 | } |
653 | ||
654 | static int | |
88d1aa9d MM |
655 | record_full_message_wrapper_safe (struct regcache *regcache, |
656 | enum gdb_signal signal) | |
d02ed0bb | 657 | { |
88d1aa9d | 658 | struct record_full_message_args args; |
d02ed0bb MM |
659 | |
660 | args.regcache = regcache; | |
661 | args.signal = signal; | |
662 | ||
7cc53fba | 663 | return catch_errors (record_full_message_wrapper, &args, "", |
88d1aa9d | 664 | RETURN_MASK_ALL); |
d02ed0bb MM |
665 | } |
666 | ||
88d1aa9d | 667 | /* Set to 1 if record_full_store_registers and record_full_xfer_partial |
d02ed0bb MM |
668 | doesn't need record. */ |
669 | ||
88d1aa9d | 670 | static int record_full_gdb_operation_disable = 0; |
d02ed0bb MM |
671 | |
672 | struct cleanup * | |
25ea693b | 673 | record_full_gdb_operation_disable_set (void) |
d02ed0bb MM |
674 | { |
675 | struct cleanup *old_cleanups = NULL; | |
676 | ||
677 | old_cleanups = | |
88d1aa9d MM |
678 | make_cleanup_restore_integer (&record_full_gdb_operation_disable); |
679 | record_full_gdb_operation_disable = 1; | |
d02ed0bb MM |
680 | |
681 | return old_cleanups; | |
682 | } | |
683 | ||
684 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ | |
9e8915c6 PA |
685 | static enum target_stop_reason record_full_stop_reason |
686 | = TARGET_STOPPED_BY_NO_REASON; | |
d02ed0bb MM |
687 | |
688 | /* Execute one instruction from the record log. Each instruction in | |
689 | the log will be represented by an arbitrary sequence of register | |
690 | entries and memory entries, followed by an 'end' entry. */ | |
691 | ||
692 | static inline void | |
88d1aa9d MM |
693 | record_full_exec_insn (struct regcache *regcache, |
694 | struct gdbarch *gdbarch, | |
695 | struct record_full_entry *entry) | |
d02ed0bb MM |
696 | { |
697 | switch (entry->type) | |
698 | { | |
88d1aa9d | 699 | case record_full_reg: /* reg */ |
d02ed0bb MM |
700 | { |
701 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
702 | ||
703 | if (record_debug > 1) | |
704 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 705 | "Process record: record_full_reg %s to " |
d02ed0bb MM |
706 | "inferior num = %d.\n", |
707 | host_address_to_string (entry), | |
708 | entry->u.reg.num); | |
709 | ||
710 | regcache_cooked_read (regcache, entry->u.reg.num, reg); | |
711 | regcache_cooked_write (regcache, entry->u.reg.num, | |
88d1aa9d MM |
712 | record_full_get_loc (entry)); |
713 | memcpy (record_full_get_loc (entry), reg, entry->u.reg.len); | |
d02ed0bb MM |
714 | } |
715 | break; | |
716 | ||
88d1aa9d | 717 | case record_full_mem: /* mem */ |
d02ed0bb MM |
718 | { |
719 | /* Nothing to do if the entry is flagged not_accessible. */ | |
720 | if (!entry->u.mem.mem_entry_not_accessible) | |
721 | { | |
394816ee MK |
722 | gdb_byte *mem = (gdb_byte *) xmalloc (entry->u.mem.len); |
723 | struct cleanup *cleanup = make_cleanup (xfree, mem); | |
d02ed0bb MM |
724 | |
725 | if (record_debug > 1) | |
726 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 727 | "Process record: record_full_mem %s to " |
d02ed0bb MM |
728 | "inferior addr = %s len = %d.\n", |
729 | host_address_to_string (entry), | |
730 | paddress (gdbarch, entry->u.mem.addr), | |
731 | entry->u.mem.len); | |
732 | ||
733 | if (record_read_memory (gdbarch, | |
734 | entry->u.mem.addr, mem, entry->u.mem.len)) | |
735 | entry->u.mem.mem_entry_not_accessible = 1; | |
736 | else | |
737 | { | |
738 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 739 | record_full_get_loc (entry), |
d02ed0bb MM |
740 | entry->u.mem.len)) |
741 | { | |
742 | entry->u.mem.mem_entry_not_accessible = 1; | |
743 | if (record_debug) | |
744 | warning (_("Process record: error writing memory at " | |
745 | "addr = %s len = %d."), | |
746 | paddress (gdbarch, entry->u.mem.addr), | |
747 | entry->u.mem.len); | |
748 | } | |
749 | else | |
750 | { | |
88d1aa9d MM |
751 | memcpy (record_full_get_loc (entry), mem, |
752 | entry->u.mem.len); | |
d02ed0bb MM |
753 | |
754 | /* We've changed memory --- check if a hardware | |
755 | watchpoint should trap. Note that this | |
756 | presently assumes the target beneath supports | |
757 | continuable watchpoints. On non-continuable | |
758 | watchpoints target, we'll want to check this | |
759 | _before_ actually doing the memory change, and | |
760 | not doing the change at all if the watchpoint | |
761 | traps. */ | |
762 | if (hardware_watchpoint_inserted_in_range | |
763 | (get_regcache_aspace (regcache), | |
764 | entry->u.mem.addr, entry->u.mem.len)) | |
9e8915c6 | 765 | record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb MM |
766 | } |
767 | } | |
394816ee MK |
768 | |
769 | do_cleanups (cleanup); | |
d02ed0bb MM |
770 | } |
771 | } | |
772 | break; | |
773 | } | |
774 | } | |
775 | ||
88d1aa9d | 776 | static void record_full_restore (void); |
d02ed0bb MM |
777 | |
778 | /* Asynchronous signal handle registered as event loop source for when | |
779 | we have pending events ready to be passed to the core. */ | |
780 | ||
88d1aa9d | 781 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
782 | |
783 | static void | |
88d1aa9d | 784 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb MM |
785 | { |
786 | inferior_event_handler (INF_REG_EVENT, NULL); | |
787 | } | |
788 | ||
789 | /* Open the process record target. */ | |
790 | ||
791 | static void | |
014f9477 | 792 | record_full_core_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
793 | { |
794 | struct regcache *regcache = get_current_regcache (); | |
795 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
796 | int i; | |
797 | ||
88d1aa9d | 798 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 799 | target_fetch_registers (regcache, -1); |
224c3ddb | 800 | record_full_core_regbuf = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE * regnum); |
d02ed0bb MM |
801 | for (i = 0; i < regnum; i ++) |
802 | regcache_raw_collect (regcache, i, | |
88d1aa9d | 803 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb | 804 | |
88d1aa9d MM |
805 | /* Get record_full_core_start and record_full_core_end. */ |
806 | if (build_section_table (core_bfd, &record_full_core_start, | |
807 | &record_full_core_end)) | |
d02ed0bb | 808 | { |
88d1aa9d MM |
809 | xfree (record_full_core_regbuf); |
810 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
811 | error (_("\"%s\": Can't find sections: %s"), |
812 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
813 | } | |
814 | ||
88d1aa9d MM |
815 | push_target (&record_full_core_ops); |
816 | record_full_restore (); | |
d02ed0bb MM |
817 | } |
818 | ||
819 | /* "to_open" target method for 'live' processes. */ | |
820 | ||
821 | static void | |
014f9477 | 822 | record_full_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
823 | { |
824 | if (record_debug) | |
0a0640e3 | 825 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open_1\n"); |
d02ed0bb MM |
826 | |
827 | /* check exec */ | |
828 | if (!target_has_execution) | |
829 | error (_("Process record: the program is not being run.")); | |
830 | if (non_stop) | |
831 | error (_("Process record target can't debug inferior in non-stop mode " | |
832 | "(non-stop).")); | |
833 | ||
834 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
835 | error (_("Process record: the current architecture doesn't support " | |
836 | "record function.")); | |
837 | ||
88d1aa9d | 838 | push_target (&record_full_ops); |
d02ed0bb MM |
839 | } |
840 | ||
88d1aa9d | 841 | static void record_full_init_record_breakpoints (void); |
d02ed0bb MM |
842 | |
843 | /* "to_open" target method. Open the process record target. */ | |
844 | ||
845 | static void | |
014f9477 | 846 | record_full_open (const char *name, int from_tty) |
d02ed0bb MM |
847 | { |
848 | struct target_ops *t; | |
849 | ||
850 | if (record_debug) | |
88d1aa9d | 851 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 852 | |
8213266a | 853 | record_preopen (); |
d02ed0bb | 854 | |
d02ed0bb | 855 | /* Reset */ |
88d1aa9d MM |
856 | record_full_insn_num = 0; |
857 | record_full_insn_count = 0; | |
858 | record_full_list = &record_full_first; | |
859 | record_full_list->next = NULL; | |
d02ed0bb | 860 | |
d02ed0bb | 861 | if (core_bfd) |
88d1aa9d | 862 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 863 | else |
88d1aa9d | 864 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
865 | |
866 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
867 | record_full_async_inferior_event_token |
868 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
d02ed0bb MM |
869 | NULL); |
870 | ||
88d1aa9d | 871 | record_full_init_record_breakpoints (); |
d02ed0bb | 872 | |
38b022b4 | 873 | observer_notify_record_changed (current_inferior (), 1, "full", NULL); |
d02ed0bb MM |
874 | } |
875 | ||
876 | /* "to_close" target method. Close the process record target. */ | |
877 | ||
878 | static void | |
de90e03d | 879 | record_full_close (struct target_ops *self) |
d02ed0bb | 880 | { |
88d1aa9d | 881 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
882 | |
883 | if (record_debug) | |
88d1aa9d | 884 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 885 | |
88d1aa9d | 886 | record_full_list_release (record_full_list); |
d02ed0bb | 887 | |
88d1aa9d MM |
888 | /* Release record_full_core_regbuf. */ |
889 | if (record_full_core_regbuf) | |
d02ed0bb | 890 | { |
88d1aa9d MM |
891 | xfree (record_full_core_regbuf); |
892 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
893 | } |
894 | ||
88d1aa9d MM |
895 | /* Release record_full_core_buf_list. */ |
896 | if (record_full_core_buf_list) | |
d02ed0bb | 897 | { |
88d1aa9d MM |
898 | for (entry = record_full_core_buf_list->prev; entry; |
899 | entry = entry->prev) | |
d02ed0bb | 900 | { |
88d1aa9d MM |
901 | xfree (record_full_core_buf_list); |
902 | record_full_core_buf_list = entry; | |
d02ed0bb | 903 | } |
88d1aa9d | 904 | record_full_core_buf_list = NULL; |
d02ed0bb MM |
905 | } |
906 | ||
88d1aa9d MM |
907 | if (record_full_async_inferior_event_token) |
908 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
909 | } |
910 | ||
b7d2e916 PA |
911 | /* "to_async" target method. */ |
912 | ||
913 | static void | |
6a3753b3 | 914 | record_full_async (struct target_ops *ops, int enable) |
b7d2e916 | 915 | { |
6a3753b3 | 916 | if (enable) |
b7d2e916 PA |
917 | mark_async_event_handler (record_full_async_inferior_event_token); |
918 | else | |
919 | clear_async_event_handler (record_full_async_inferior_event_token); | |
920 | ||
6a3753b3 | 921 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
922 | } |
923 | ||
88d1aa9d | 924 | static int record_full_resume_step = 0; |
d02ed0bb | 925 | |
88d1aa9d MM |
926 | /* True if we've been resumed, and so each record_full_wait call should |
927 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 928 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 929 | static int record_full_resumed = 0; |
d02ed0bb MM |
930 | |
931 | /* The execution direction of the last resume we got. This is | |
932 | necessary for async mode. Vis (order is not strictly accurate): | |
933 | ||
934 | 1. user has the global execution direction set to forward | |
935 | 2. user does a reverse-step command | |
88d1aa9d | 936 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
937 | temporarily switched to reverse |
938 | 4. GDB's execution direction is reverted back to forward | |
939 | 5. target record notifies event loop there's an event to handle | |
940 | 6. infrun asks the target which direction was it going, and switches | |
941 | the global execution direction accordingly (to reverse) | |
942 | 7. infrun polls an event out of the record target, and handles it | |
943 | 8. GDB goes back to the event loop, and goto #4. | |
944 | */ | |
88d1aa9d | 945 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb MM |
946 | |
947 | /* "to_resume" target method. Resume the process record target. */ | |
948 | ||
949 | static void | |
88d1aa9d MM |
950 | record_full_resume (struct target_ops *ops, ptid_t ptid, int step, |
951 | enum gdb_signal signal) | |
d02ed0bb | 952 | { |
88d1aa9d MM |
953 | record_full_resume_step = step; |
954 | record_full_resumed = 1; | |
955 | record_full_execution_dir = execution_direction; | |
d02ed0bb | 956 | |
88d1aa9d | 957 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
958 | { |
959 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
960 | ||
88d1aa9d | 961 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
962 | |
963 | if (!step) | |
964 | { | |
965 | /* This is not hard single step. */ | |
966 | if (!gdbarch_software_single_step_p (gdbarch)) | |
967 | { | |
968 | /* This is a normal continue. */ | |
969 | step = 1; | |
970 | } | |
971 | else | |
972 | { | |
8ce9efb0 | 973 | /* This arch supports soft single step. */ |
34b7e8a6 | 974 | if (thread_has_single_step_breakpoints_set (inferior_thread ())) |
d02ed0bb MM |
975 | { |
976 | /* This is a soft single step. */ | |
88d1aa9d | 977 | record_full_resume_step = 1; |
d02ed0bb MM |
978 | } |
979 | else | |
93f9a11f | 980 | step = !insert_single_step_breakpoints (gdbarch); |
d02ed0bb MM |
981 | } |
982 | } | |
983 | ||
984 | /* Make sure the target beneath reports all signals. */ | |
985 | target_pass_signals (0, NULL); | |
986 | ||
6b84065d | 987 | ops->beneath->to_resume (ops->beneath, ptid, step, signal); |
d02ed0bb MM |
988 | } |
989 | ||
990 | /* We are about to start executing the inferior (or simulate it), | |
991 | let's register it with the event loop. */ | |
992 | if (target_can_async_p ()) | |
6a3753b3 | 993 | target_async (1); |
d02ed0bb MM |
994 | } |
995 | ||
85ad3aaf PA |
996 | /* "to_commit_resume" method for process record target. */ |
997 | ||
998 | static void | |
999 | record_full_commit_resume (struct target_ops *ops) | |
1000 | { | |
1001 | if (!RECORD_FULL_IS_REPLAY) | |
1002 | ops->beneath->to_commit_resume (ops->beneath); | |
1003 | } | |
1004 | ||
88d1aa9d | 1005 | static int record_full_get_sig = 0; |
d02ed0bb MM |
1006 | |
1007 | /* SIGINT signal handler, registered by "to_wait" method. */ | |
1008 | ||
1009 | static void | |
88d1aa9d | 1010 | record_full_sig_handler (int signo) |
d02ed0bb MM |
1011 | { |
1012 | if (record_debug) | |
1013 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1014 | ||
1015 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 1016 | record_full_resume_step = 1; |
d02ed0bb | 1017 | |
88d1aa9d | 1018 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1019 | SIGINT. */ |
88d1aa9d | 1020 | record_full_get_sig = 1; |
d02ed0bb MM |
1021 | } |
1022 | ||
1023 | static void | |
88d1aa9d | 1024 | record_full_wait_cleanups (void *ignore) |
d02ed0bb MM |
1025 | { |
1026 | if (execution_direction == EXEC_REVERSE) | |
1027 | { | |
88d1aa9d MM |
1028 | if (record_full_list->next) |
1029 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1030 | } |
1031 | else | |
88d1aa9d | 1032 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
1033 | } |
1034 | ||
1035 | /* "to_wait" target method for process record target. | |
1036 | ||
1037 | In record mode, the target is always run in singlestep mode | |
1038 | (even when gdb says to continue). The to_wait method intercepts | |
1039 | the stop events and determines which ones are to be passed on to | |
1040 | gdb. Most stop events are just singlestep events that gdb is not | |
1041 | to know about, so the to_wait method just records them and keeps | |
1042 | singlestepping. | |
1043 | ||
1044 | In replay mode, this function emulates the recorded execution log, | |
1045 | one instruction at a time (forward or backward), and determines | |
1046 | where to stop. */ | |
1047 | ||
1048 | static ptid_t | |
88d1aa9d MM |
1049 | record_full_wait_1 (struct target_ops *ops, |
1050 | ptid_t ptid, struct target_waitstatus *status, | |
1051 | int options) | |
d02ed0bb | 1052 | { |
25ea693b | 1053 | struct cleanup *set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
1054 | |
1055 | if (record_debug) | |
1056 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1057 | "Process record: record_full_wait " |
1058 | "record_full_resume_step = %d, " | |
1059 | "record_full_resumed = %d, direction=%s\n", | |
1060 | record_full_resume_step, record_full_resumed, | |
1061 | record_full_execution_dir == EXEC_FORWARD | |
1062 | ? "forward" : "reverse"); | |
1063 | ||
1064 | if (!record_full_resumed) | |
d02ed0bb MM |
1065 | { |
1066 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1067 | ||
1068 | /* No interesting event. */ | |
1069 | status->kind = TARGET_WAITKIND_IGNORE; | |
1070 | return minus_one_ptid; | |
1071 | } | |
1072 | ||
88d1aa9d MM |
1073 | record_full_get_sig = 0; |
1074 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1075 | |
9e8915c6 PA |
1076 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1077 | ||
88d1aa9d | 1078 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1079 | { |
88d1aa9d | 1080 | if (record_full_resume_step) |
d02ed0bb MM |
1081 | { |
1082 | /* This is a single step. */ | |
6b84065d | 1083 | return ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1084 | } |
1085 | else | |
1086 | { | |
1087 | /* This is not a single step. */ | |
1088 | ptid_t ret; | |
1089 | CORE_ADDR tmp_pc; | |
1090 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); | |
1091 | ||
1092 | while (1) | |
1093 | { | |
34b7e8a6 PA |
1094 | struct thread_info *tp; |
1095 | ||
6b84065d | 1096 | ret = ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1097 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1098 | { | |
1099 | if (record_debug) | |
1100 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1101 | "Process record: record_full_wait " |
d02ed0bb MM |
1102 | "target beneath not done yet\n"); |
1103 | return ret; | |
1104 | } | |
1105 | ||
34b7e8a6 PA |
1106 | ALL_NON_EXITED_THREADS (tp) |
1107 | delete_single_step_breakpoints (tp); | |
d02ed0bb | 1108 | |
88d1aa9d | 1109 | if (record_full_resume_step) |
d02ed0bb MM |
1110 | return ret; |
1111 | ||
1112 | /* Is this a SIGTRAP? */ | |
1113 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1114 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1115 | { | |
1116 | struct regcache *regcache; | |
1117 | struct address_space *aspace; | |
9e8915c6 PA |
1118 | enum target_stop_reason *stop_reason_p |
1119 | = &record_full_stop_reason; | |
d02ed0bb MM |
1120 | |
1121 | /* Yes -- this is likely our single-step finishing, | |
1122 | but check if there's any reason the core would be | |
1123 | interested in the event. */ | |
1124 | ||
1125 | registers_changed (); | |
1126 | regcache = get_current_regcache (); | |
1127 | tmp_pc = regcache_read_pc (regcache); | |
1128 | aspace = get_regcache_aspace (regcache); | |
1129 | ||
1130 | if (target_stopped_by_watchpoint ()) | |
1131 | { | |
1132 | /* Always interested in watchpoints. */ | |
1133 | } | |
9e8915c6 PA |
1134 | else if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1135 | stop_reason_p)) | |
d02ed0bb MM |
1136 | { |
1137 | /* There is a breakpoint here. Let the core | |
1138 | handle it. */ | |
d02ed0bb MM |
1139 | } |
1140 | else | |
1141 | { | |
1142 | /* This is a single-step trap. Record the | |
1143 | insn and issue another step. | |
1144 | FIXME: this part can be a random SIGTRAP too. | |
1145 | But GDB cannot handle it. */ | |
1146 | int step = 1; | |
1147 | ||
88d1aa9d MM |
1148 | if (!record_full_message_wrapper_safe (regcache, |
1149 | GDB_SIGNAL_0)) | |
d02ed0bb MM |
1150 | { |
1151 | status->kind = TARGET_WAITKIND_STOPPED; | |
1152 | status->value.sig = GDB_SIGNAL_0; | |
1153 | break; | |
1154 | } | |
1155 | ||
1156 | if (gdbarch_software_single_step_p (gdbarch)) | |
1157 | { | |
1158 | /* Try to insert the software single step breakpoint. | |
1159 | If insert success, set step to 0. */ | |
1160 | set_executing (inferior_ptid, 0); | |
1161 | reinit_frame_cache (); | |
93f9a11f YQ |
1162 | |
1163 | step = !insert_single_step_breakpoints (gdbarch); | |
1164 | ||
d02ed0bb MM |
1165 | set_executing (inferior_ptid, 1); |
1166 | } | |
1167 | ||
1168 | if (record_debug) | |
1169 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1170 | "Process record: record_full_wait " |
1171 | "issuing one more step in the " | |
1172 | "target beneath\n"); | |
6b84065d TT |
1173 | ops->beneath->to_resume (ops->beneath, ptid, step, |
1174 | GDB_SIGNAL_0); | |
85ad3aaf | 1175 | ops->beneath->to_commit_resume (ops->beneath); |
d02ed0bb MM |
1176 | continue; |
1177 | } | |
1178 | } | |
1179 | ||
1180 | /* The inferior is broken by a breakpoint or a signal. */ | |
1181 | break; | |
1182 | } | |
1183 | ||
1184 | return ret; | |
1185 | } | |
1186 | } | |
1187 | else | |
1188 | { | |
1189 | struct regcache *regcache = get_current_regcache (); | |
1190 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1191 | struct address_space *aspace = get_regcache_aspace (regcache); | |
1192 | int continue_flag = 1; | |
88d1aa9d MM |
1193 | int first_record_full_end = 1; |
1194 | struct cleanup *old_cleanups | |
1195 | = make_cleanup (record_full_wait_cleanups, 0); | |
d02ed0bb MM |
1196 | CORE_ADDR tmp_pc; |
1197 | ||
9e8915c6 | 1198 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
d02ed0bb MM |
1199 | status->kind = TARGET_WAITKIND_STOPPED; |
1200 | ||
1201 | /* Check breakpoint when forward execute. */ | |
1202 | if (execution_direction == EXEC_FORWARD) | |
1203 | { | |
1204 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1205 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1206 | &record_full_stop_reason)) | |
d02ed0bb | 1207 | { |
d02ed0bb MM |
1208 | if (record_debug) |
1209 | fprintf_unfiltered (gdb_stdlog, | |
1210 | "Process record: break at %s.\n", | |
1211 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb MM |
1212 | goto replay_out; |
1213 | } | |
1214 | } | |
1215 | ||
1216 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
1217 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1218 | mode, because inferior will not executed. | |
1219 | Then set it to terminal_ours to make GDB get the signal. */ | |
1220 | target_terminal_ours (); | |
1221 | ||
88d1aa9d | 1222 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev |
d02ed0bb | 1223 | instruction. */ |
88d1aa9d MM |
1224 | if (execution_direction == EXEC_FORWARD && record_full_list->next) |
1225 | record_full_list = record_full_list->next; | |
d02ed0bb | 1226 | |
88d1aa9d | 1227 | /* Loop over the record_full_list, looking for the next place to |
d02ed0bb MM |
1228 | stop. */ |
1229 | do | |
1230 | { | |
1231 | /* Check for beginning and end of log. */ | |
1232 | if (execution_direction == EXEC_REVERSE | |
88d1aa9d | 1233 | && record_full_list == &record_full_first) |
d02ed0bb MM |
1234 | { |
1235 | /* Hit beginning of record log in reverse. */ | |
1236 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1237 | break; | |
1238 | } | |
88d1aa9d | 1239 | if (execution_direction != EXEC_REVERSE && !record_full_list->next) |
d02ed0bb MM |
1240 | { |
1241 | /* Hit end of record log going forward. */ | |
1242 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1243 | break; | |
1244 | } | |
1245 | ||
88d1aa9d | 1246 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 1247 | |
88d1aa9d | 1248 | if (record_full_list->type == record_full_end) |
d02ed0bb MM |
1249 | { |
1250 | if (record_debug > 1) | |
1251 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1252 | "Process record: record_full_end %s to " |
d02ed0bb | 1253 | "inferior.\n", |
88d1aa9d | 1254 | host_address_to_string (record_full_list)); |
d02ed0bb | 1255 | |
88d1aa9d | 1256 | if (first_record_full_end && execution_direction == EXEC_REVERSE) |
d02ed0bb | 1257 | { |
88d1aa9d MM |
1258 | /* When reverse excute, the first record_full_end is the |
1259 | part of current instruction. */ | |
1260 | first_record_full_end = 0; | |
d02ed0bb MM |
1261 | } |
1262 | else | |
1263 | { | |
88d1aa9d | 1264 | /* In EXEC_REVERSE mode, this is the record_full_end of prev |
d02ed0bb | 1265 | instruction. |
88d1aa9d MM |
1266 | In EXEC_FORWARD mode, this is the record_full_end of |
1267 | current instruction. */ | |
d02ed0bb | 1268 | /* step */ |
88d1aa9d | 1269 | if (record_full_resume_step) |
d02ed0bb MM |
1270 | { |
1271 | if (record_debug > 1) | |
1272 | fprintf_unfiltered (gdb_stdlog, | |
1273 | "Process record: step.\n"); | |
1274 | continue_flag = 0; | |
1275 | } | |
1276 | ||
1277 | /* check breakpoint */ | |
1278 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1279 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1280 | &record_full_stop_reason)) | |
d02ed0bb | 1281 | { |
d02ed0bb MM |
1282 | if (record_debug) |
1283 | fprintf_unfiltered (gdb_stdlog, | |
1284 | "Process record: break " | |
1285 | "at %s.\n", | |
1286 | paddress (gdbarch, tmp_pc)); | |
9e8915c6 | 1287 | |
d02ed0bb MM |
1288 | continue_flag = 0; |
1289 | } | |
1290 | ||
9e8915c6 | 1291 | if (record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT) |
d02ed0bb MM |
1292 | { |
1293 | if (record_debug) | |
1294 | fprintf_unfiltered (gdb_stdlog, | |
1295 | "Process record: hit hw " | |
1296 | "watchpoint.\n"); | |
1297 | continue_flag = 0; | |
1298 | } | |
1299 | /* Check target signal */ | |
88d1aa9d | 1300 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb MM |
1301 | /* FIXME: better way to check */ |
1302 | continue_flag = 0; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | if (continue_flag) | |
1307 | { | |
1308 | if (execution_direction == EXEC_REVERSE) | |
1309 | { | |
88d1aa9d MM |
1310 | if (record_full_list->prev) |
1311 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
1312 | } |
1313 | else | |
1314 | { | |
88d1aa9d MM |
1315 | if (record_full_list->next) |
1316 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1317 | } |
1318 | } | |
1319 | } | |
1320 | while (continue_flag); | |
1321 | ||
1322 | replay_out: | |
88d1aa9d | 1323 | if (record_full_get_sig) |
d02ed0bb | 1324 | status->value.sig = GDB_SIGNAL_INT; |
88d1aa9d | 1325 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb | 1326 | /* FIXME: better way to check */ |
88d1aa9d | 1327 | status->value.sig = record_full_list->u.end.sigval; |
d02ed0bb MM |
1328 | else |
1329 | status->value.sig = GDB_SIGNAL_TRAP; | |
1330 | ||
1331 | discard_cleanups (old_cleanups); | |
1332 | } | |
1333 | ||
1334 | signal (SIGINT, handle_sigint); | |
1335 | ||
1336 | do_cleanups (set_cleanups); | |
1337 | return inferior_ptid; | |
1338 | } | |
1339 | ||
1340 | static ptid_t | |
88d1aa9d MM |
1341 | record_full_wait (struct target_ops *ops, |
1342 | ptid_t ptid, struct target_waitstatus *status, | |
1343 | int options) | |
d02ed0bb MM |
1344 | { |
1345 | ptid_t return_ptid; | |
1346 | ||
88d1aa9d | 1347 | return_ptid = record_full_wait_1 (ops, ptid, status, options); |
d02ed0bb MM |
1348 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1349 | { | |
1350 | /* We're reporting a stop. Make sure any spurious | |
1351 | target_wait(WNOHANG) doesn't advance the target until the | |
1352 | core wants us resumed again. */ | |
88d1aa9d | 1353 | record_full_resumed = 0; |
d02ed0bb MM |
1354 | } |
1355 | return return_ptid; | |
1356 | } | |
1357 | ||
1358 | static int | |
6a109b6b | 1359 | record_full_stopped_by_watchpoint (struct target_ops *ops) |
d02ed0bb | 1360 | { |
88d1aa9d | 1361 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1362 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1363 | else |
6b84065d | 1364 | return ops->beneath->to_stopped_by_watchpoint (ops->beneath); |
d02ed0bb MM |
1365 | } |
1366 | ||
d02ed0bb | 1367 | static int |
88d1aa9d | 1368 | record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) |
d02ed0bb | 1369 | { |
88d1aa9d | 1370 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1371 | return 0; |
1372 | else | |
6b84065d | 1373 | return ops->beneath->to_stopped_data_address (ops->beneath, addr_p); |
d02ed0bb MM |
1374 | } |
1375 | ||
9e8915c6 PA |
1376 | /* The to_stopped_by_sw_breakpoint method of target record-full. */ |
1377 | ||
1378 | static int | |
1379 | record_full_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1380 | { | |
1381 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1382 | } | |
1383 | ||
1384 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1385 | record-full. */ | |
1386 | ||
1387 | static int | |
1388 | record_full_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1389 | { | |
1390 | return 1; | |
1391 | } | |
1392 | ||
1393 | /* The to_stopped_by_hw_breakpoint method of target record-full. */ | |
1394 | ||
1395 | static int | |
1396 | record_full_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1397 | { | |
1398 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
1399 | } | |
1400 | ||
1401 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1402 | record-full. */ | |
1403 | ||
1404 | static int | |
1405 | record_full_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1406 | { | |
1407 | return 1; | |
1408 | } | |
1409 | ||
d02ed0bb MM |
1410 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1411 | ||
1412 | static void | |
88d1aa9d | 1413 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1414 | { |
88d1aa9d | 1415 | /* Check record_full_insn_num. */ |
651ce16a | 1416 | record_full_check_insn_num (); |
d02ed0bb | 1417 | |
88d1aa9d MM |
1418 | record_full_arch_list_head = NULL; |
1419 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1420 | |
1421 | if (regnum < 0) | |
1422 | { | |
1423 | int i; | |
1424 | ||
1425 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
1426 | { | |
25ea693b | 1427 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1428 | { |
88d1aa9d | 1429 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1430 | error (_("Process record: failed to record execution log.")); |
1431 | } | |
1432 | } | |
1433 | } | |
1434 | else | |
1435 | { | |
25ea693b | 1436 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1437 | { |
88d1aa9d | 1438 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1439 | error (_("Process record: failed to record execution log.")); |
1440 | } | |
1441 | } | |
25ea693b | 1442 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1443 | { |
88d1aa9d | 1444 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1445 | error (_("Process record: failed to record execution log.")); |
1446 | } | |
88d1aa9d MM |
1447 | record_full_list->next = record_full_arch_list_head; |
1448 | record_full_arch_list_head->prev = record_full_list; | |
1449 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1450 | |
7ee70bf5 | 1451 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1452 | record_full_list_release_first (); |
d02ed0bb | 1453 | else |
88d1aa9d | 1454 | record_full_insn_num++; |
d02ed0bb MM |
1455 | } |
1456 | ||
1457 | /* "to_store_registers" method for process record target. */ | |
1458 | ||
1459 | static void | |
88d1aa9d MM |
1460 | record_full_store_registers (struct target_ops *ops, |
1461 | struct regcache *regcache, | |
1462 | int regno) | |
d02ed0bb | 1463 | { |
88d1aa9d | 1464 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1465 | { |
88d1aa9d | 1466 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1467 | { |
1468 | int n; | |
1469 | ||
1470 | /* Let user choose if he wants to write register or not. */ | |
1471 | if (regno < 0) | |
1472 | n = | |
1473 | query (_("Because GDB is in replay mode, changing the " | |
1474 | "value of a register will make the execution " | |
1475 | "log unusable from this point onward. " | |
1476 | "Change all registers?")); | |
1477 | else | |
1478 | n = | |
1479 | query (_("Because GDB is in replay mode, changing the value " | |
1480 | "of a register will make the execution log unusable " | |
1481 | "from this point onward. Change register %s?"), | |
1482 | gdbarch_register_name (get_regcache_arch (regcache), | |
1483 | regno)); | |
1484 | ||
1485 | if (!n) | |
1486 | { | |
1487 | /* Invalidate the value of regcache that was set in function | |
1488 | "regcache_raw_write". */ | |
1489 | if (regno < 0) | |
1490 | { | |
1491 | int i; | |
1492 | ||
1493 | for (i = 0; | |
1494 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1495 | i++) | |
1496 | regcache_invalidate (regcache, i); | |
1497 | } | |
1498 | else | |
1499 | regcache_invalidate (regcache, regno); | |
1500 | ||
1501 | error (_("Process record canceled the operation.")); | |
1502 | } | |
1503 | ||
1504 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1505 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1506 | } |
1507 | ||
88d1aa9d | 1508 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1509 | } |
6b84065d | 1510 | ops->beneath->to_store_registers (ops->beneath, regcache, regno); |
d02ed0bb MM |
1511 | } |
1512 | ||
88d1aa9d MM |
1513 | /* "to_xfer_partial" method. Behavior is conditional on |
1514 | RECORD_FULL_IS_REPLAY. | |
d02ed0bb MM |
1515 | In replay mode, we cannot write memory unles we are willing to |
1516 | invalidate the record/replay log from this point forward. */ | |
1517 | ||
9b409511 | 1518 | static enum target_xfer_status |
88d1aa9d MM |
1519 | record_full_xfer_partial (struct target_ops *ops, enum target_object object, |
1520 | const char *annex, gdb_byte *readbuf, | |
1521 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1522 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb | 1523 | { |
88d1aa9d | 1524 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1525 | && (object == TARGET_OBJECT_MEMORY |
1526 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1527 | { | |
88d1aa9d | 1528 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1529 | { |
1530 | /* Let user choose if he wants to write memory or not. */ | |
1531 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
1532 | "will make the execution log unusable from this " | |
1533 | "point onward. Write memory at address %s?"), | |
1534 | paddress (target_gdbarch (), offset))) | |
1535 | error (_("Process record canceled the operation.")); | |
1536 | ||
1537 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1538 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1539 | } |
1540 | ||
88d1aa9d | 1541 | /* Check record_full_insn_num */ |
651ce16a | 1542 | record_full_check_insn_num (); |
d02ed0bb MM |
1543 | |
1544 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1545 | record_full_arch_list_head = NULL; |
1546 | record_full_arch_list_tail = NULL; | |
25ea693b | 1547 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1548 | { |
88d1aa9d | 1549 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1550 | if (record_debug) |
1551 | fprintf_unfiltered (gdb_stdlog, | |
1552 | "Process record: failed to record " | |
1553 | "execution log."); | |
2ed4b548 | 1554 | return TARGET_XFER_E_IO; |
d02ed0bb | 1555 | } |
25ea693b | 1556 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1557 | { |
88d1aa9d | 1558 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1559 | if (record_debug) |
1560 | fprintf_unfiltered (gdb_stdlog, | |
1561 | "Process record: failed to record " | |
1562 | "execution log."); | |
2ed4b548 | 1563 | return TARGET_XFER_E_IO; |
d02ed0bb | 1564 | } |
88d1aa9d MM |
1565 | record_full_list->next = record_full_arch_list_head; |
1566 | record_full_arch_list_head->prev = record_full_list; | |
1567 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1568 | |
7ee70bf5 | 1569 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1570 | record_full_list_release_first (); |
d02ed0bb | 1571 | else |
88d1aa9d | 1572 | record_full_insn_num++; |
d02ed0bb MM |
1573 | } |
1574 | ||
6b84065d TT |
1575 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
1576 | readbuf, writebuf, offset, | |
1577 | len, xfered_len); | |
d02ed0bb MM |
1578 | } |
1579 | ||
1580 | /* This structure represents a breakpoint inserted while the record | |
1581 | target is active. We use this to know when to install/remove | |
1582 | breakpoints in/from the target beneath. For example, a breakpoint | |
1583 | may be inserted while recording, but removed when not replaying nor | |
1584 | recording. In that case, the breakpoint had not been inserted on | |
1585 | the target beneath, so we should not try to remove it there. */ | |
1586 | ||
88d1aa9d | 1587 | struct record_full_breakpoint |
d02ed0bb MM |
1588 | { |
1589 | /* The address and address space the breakpoint was set at. */ | |
1590 | struct address_space *address_space; | |
1591 | CORE_ADDR addr; | |
1592 | ||
1593 | /* True when the breakpoint has been also installed in the target | |
1594 | beneath. This will be false for breakpoints set during replay or | |
1595 | when recording. */ | |
1596 | int in_target_beneath; | |
1597 | }; | |
1598 | ||
88d1aa9d MM |
1599 | typedef struct record_full_breakpoint *record_full_breakpoint_p; |
1600 | DEF_VEC_P(record_full_breakpoint_p); | |
d02ed0bb MM |
1601 | |
1602 | /* The list of breakpoints inserted while the record target is | |
1603 | active. */ | |
88d1aa9d | 1604 | VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL; |
d02ed0bb MM |
1605 | |
1606 | static void | |
88d1aa9d | 1607 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1608 | { |
1609 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1610 | return; | |
1611 | ||
1612 | if (loc->inserted) | |
1613 | { | |
88d1aa9d | 1614 | struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1615 | |
1616 | bp->addr = loc->target_info.placed_address; | |
1617 | bp->address_space = loc->target_info.placed_address_space; | |
1618 | ||
1619 | bp->in_target_beneath = 1; | |
1620 | ||
88d1aa9d | 1621 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1622 | } |
1623 | } | |
1624 | ||
88d1aa9d | 1625 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1626 | |
1627 | static void | |
88d1aa9d | 1628 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1629 | { |
88d1aa9d | 1630 | VEC_free (record_full_breakpoint_p, record_full_breakpoints); |
d02ed0bb | 1631 | |
88d1aa9d | 1632 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1633 | } |
1634 | ||
88d1aa9d | 1635 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1636 | insert or remove breakpoints in the real target when replaying, nor |
1637 | when recording. */ | |
1638 | ||
1639 | static int | |
3db08215 MM |
1640 | record_full_insert_breakpoint (struct target_ops *ops, |
1641 | struct gdbarch *gdbarch, | |
88d1aa9d | 1642 | struct bp_target_info *bp_tgt) |
d02ed0bb | 1643 | { |
88d1aa9d | 1644 | struct record_full_breakpoint *bp; |
d02ed0bb | 1645 | int in_target_beneath = 0; |
e390720b | 1646 | int ix; |
d02ed0bb | 1647 | |
88d1aa9d | 1648 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1649 | { |
1650 | /* When recording, we currently always single-step, so we don't | |
1651 | really need to install regular breakpoints in the inferior. | |
1652 | However, we do have to insert software single-step | |
1653 | breakpoints, in case the target can't hardware step. To keep | |
f99bd5f2 | 1654 | things simple, we always insert. */ |
d02ed0bb MM |
1655 | struct cleanup *old_cleanups; |
1656 | int ret; | |
1657 | ||
25ea693b | 1658 | old_cleanups = record_full_gdb_operation_disable_set (); |
6b84065d | 1659 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
d02ed0bb MM |
1660 | do_cleanups (old_cleanups); |
1661 | ||
1662 | if (ret != 0) | |
1663 | return ret; | |
1664 | ||
1665 | in_target_beneath = 1; | |
1666 | } | |
1667 | ||
e390720b YQ |
1668 | /* Use the existing entries if found in order to avoid duplication |
1669 | in record_full_breakpoints. */ | |
1670 | ||
1671 | for (ix = 0; | |
1672 | VEC_iterate (record_full_breakpoint_p, | |
1673 | record_full_breakpoints, ix, bp); | |
1674 | ++ix) | |
1675 | { | |
1676 | if (bp->addr == bp_tgt->placed_address | |
1677 | && bp->address_space == bp_tgt->placed_address_space) | |
1678 | { | |
1679 | gdb_assert (bp->in_target_beneath == in_target_beneath); | |
1680 | return 0; | |
1681 | } | |
1682 | } | |
1683 | ||
88d1aa9d | 1684 | bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1685 | bp->addr = bp_tgt->placed_address; |
1686 | bp->address_space = bp_tgt->placed_address_space; | |
1687 | bp->in_target_beneath = in_target_beneath; | |
88d1aa9d | 1688 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1689 | return 0; |
1690 | } | |
1691 | ||
1692 | /* "to_remove_breakpoint" method for process record target. */ | |
1693 | ||
1694 | static int | |
3db08215 MM |
1695 | record_full_remove_breakpoint (struct target_ops *ops, |
1696 | struct gdbarch *gdbarch, | |
73971819 PA |
1697 | struct bp_target_info *bp_tgt, |
1698 | enum remove_bp_reason reason) | |
d02ed0bb | 1699 | { |
88d1aa9d | 1700 | struct record_full_breakpoint *bp; |
d02ed0bb MM |
1701 | int ix; |
1702 | ||
1703 | for (ix = 0; | |
88d1aa9d MM |
1704 | VEC_iterate (record_full_breakpoint_p, |
1705 | record_full_breakpoints, ix, bp); | |
d02ed0bb MM |
1706 | ++ix) |
1707 | { | |
1708 | if (bp->addr == bp_tgt->placed_address | |
1709 | && bp->address_space == bp_tgt->placed_address_space) | |
1710 | { | |
1711 | if (bp->in_target_beneath) | |
1712 | { | |
1713 | struct cleanup *old_cleanups; | |
1714 | int ret; | |
1715 | ||
25ea693b | 1716 | old_cleanups = record_full_gdb_operation_disable_set (); |
6b84065d | 1717 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, |
73971819 | 1718 | bp_tgt, reason); |
d02ed0bb MM |
1719 | do_cleanups (old_cleanups); |
1720 | ||
1721 | if (ret != 0) | |
1722 | return ret; | |
1723 | } | |
1724 | ||
01d3dedf PA |
1725 | if (reason == REMOVE_BREAKPOINT) |
1726 | { | |
1727 | VEC_unordered_remove (record_full_breakpoint_p, | |
1728 | record_full_breakpoints, ix); | |
1729 | } | |
d02ed0bb MM |
1730 | return 0; |
1731 | } | |
1732 | } | |
1733 | ||
1734 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1735 | } | |
1736 | ||
1737 | /* "to_can_execute_reverse" method for process record target. */ | |
1738 | ||
1739 | static int | |
19db3e69 | 1740 | record_full_can_execute_reverse (struct target_ops *self) |
d02ed0bb MM |
1741 | { |
1742 | return 1; | |
1743 | } | |
1744 | ||
1745 | /* "to_get_bookmark" method for process record and prec over core. */ | |
1746 | ||
1747 | static gdb_byte * | |
c2bcbb1d TT |
1748 | record_full_get_bookmark (struct target_ops *self, const char *args, |
1749 | int from_tty) | |
d02ed0bb | 1750 | { |
0f928d68 | 1751 | char *ret = NULL; |
d02ed0bb MM |
1752 | |
1753 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1754 | if (record_full_list && record_full_list->type == record_full_end) |
1755 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1756 | |
1757 | if (record_debug) | |
1758 | { | |
1759 | if (ret) | |
1760 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1761 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1762 | else |
1763 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1764 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1765 | } |
0f928d68 | 1766 | return (gdb_byte *) ret; |
d02ed0bb MM |
1767 | } |
1768 | ||
1769 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1770 | ||
1771 | static void | |
3c80fb48 | 1772 | record_full_goto_bookmark (struct target_ops *self, |
c2bcbb1d | 1773 | const gdb_byte *raw_bookmark, int from_tty) |
d02ed0bb | 1774 | { |
c2bcbb1d TT |
1775 | const char *bookmark = (const char *) raw_bookmark; |
1776 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); | |
0f928d68 | 1777 | |
d02ed0bb MM |
1778 | if (record_debug) |
1779 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1780 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb MM |
1781 | |
1782 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1783 | { | |
c2bcbb1d TT |
1784 | char *copy; |
1785 | ||
d02ed0bb MM |
1786 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) |
1787 | error (_("Unbalanced quotes: %s"), bookmark); | |
1788 | ||
c2bcbb1d TT |
1789 | |
1790 | copy = savestring (bookmark + 1, strlen (bookmark) - 2); | |
1791 | make_cleanup (xfree, copy); | |
1792 | bookmark = copy; | |
d02ed0bb MM |
1793 | } |
1794 | ||
c2bcbb1d TT |
1795 | record_goto (bookmark); |
1796 | ||
1797 | do_cleanups (cleanup); | |
d02ed0bb MM |
1798 | } |
1799 | ||
d02ed0bb | 1800 | static enum exec_direction_kind |
4c612759 | 1801 | record_full_execution_direction (struct target_ops *self) |
d02ed0bb | 1802 | { |
88d1aa9d | 1803 | return record_full_execution_dir; |
d02ed0bb MM |
1804 | } |
1805 | ||
b158a20f TW |
1806 | /* The to_record_method method of target record-full. */ |
1807 | ||
1808 | enum record_method | |
1809 | record_full_record_method (struct target_ops *self, ptid_t ptid) | |
1810 | { | |
1811 | return RECORD_METHOD_FULL; | |
1812 | } | |
1813 | ||
d02ed0bb | 1814 | static void |
630d6a4a | 1815 | record_full_info (struct target_ops *self) |
d02ed0bb | 1816 | { |
88d1aa9d | 1817 | struct record_full_entry *p; |
d02ed0bb | 1818 | |
88d1aa9d | 1819 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1820 | printf_filtered (_("Replay mode:\n")); |
1821 | else | |
1822 | printf_filtered (_("Record mode:\n")); | |
1823 | ||
1824 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1825 | for (p = record_full_first.next; |
1826 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1827 | p = p->next) |
1828 | ; | |
1829 | ||
1830 | /* Do we have a log at all? */ | |
88d1aa9d | 1831 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1832 | { |
1833 | /* Display instruction number for first instruction in the log. */ | |
1834 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1835 | pulongest (p->u.end.insn_num)); | |
1836 | ||
1837 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1838 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1839 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1840 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1841 | |
1842 | /* Display instruction number for last instruction in the log. */ | |
1843 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1844 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1845 | |
1846 | /* Display log count. */ | |
7ee70bf5 | 1847 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1848 | record_full_insn_num); |
d02ed0bb MM |
1849 | } |
1850 | else | |
1851 | printf_filtered (_("No instructions have been logged.\n")); | |
1852 | ||
1853 | /* Display max log size. */ | |
7ee70bf5 | 1854 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1855 | record_full_insn_max_num); |
d02ed0bb MM |
1856 | } |
1857 | ||
1858 | /* The "to_record_delete" target method. */ | |
1859 | ||
1860 | static void | |
d1b55219 | 1861 | record_full_delete (struct target_ops *self) |
d02ed0bb | 1862 | { |
88d1aa9d | 1863 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1864 | } |
1865 | ||
1866 | /* The "to_record_is_replaying" target method. */ | |
1867 | ||
1868 | static int | |
a52eab48 | 1869 | record_full_is_replaying (struct target_ops *self, ptid_t ptid) |
d02ed0bb | 1870 | { |
88d1aa9d | 1871 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1872 | } |
1873 | ||
7ff27e9b MM |
1874 | /* The "to_record_will_replay" target method. */ |
1875 | ||
1876 | static int | |
1877 | record_full_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1878 | { | |
1879 | /* We can currently only record when executing forwards. Should we be able | |
1880 | to record when executing backwards on targets that support reverse | |
1881 | execution, this needs to be changed. */ | |
1882 | ||
1883 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1884 | } | |
1885 | ||
d02ed0bb MM |
1886 | /* Go to a specific entry. */ |
1887 | ||
1888 | static void | |
88d1aa9d | 1889 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1890 | { |
1891 | if (p == NULL) | |
1892 | error (_("Target insn not found.")); | |
88d1aa9d | 1893 | else if (p == record_full_list) |
d02ed0bb | 1894 | error (_("Already at target insn.")); |
88d1aa9d | 1895 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1896 | { |
1897 | printf_filtered (_("Go forward to insn number %s\n"), | |
1898 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1899 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
1900 | } |
1901 | else | |
1902 | { | |
1903 | printf_filtered (_("Go backward to insn number %s\n"), | |
1904 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1905 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
1906 | } |
1907 | ||
1908 | registers_changed (); | |
1909 | reinit_frame_cache (); | |
485668e5 | 1910 | stop_pc = regcache_read_pc (get_current_regcache ()); |
08d72866 | 1911 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
1912 | } |
1913 | ||
1914 | /* The "to_goto_record_begin" target method. */ | |
1915 | ||
1916 | static void | |
08475817 | 1917 | record_full_goto_begin (struct target_ops *self) |
d02ed0bb | 1918 | { |
88d1aa9d | 1919 | struct record_full_entry *p = NULL; |
d02ed0bb | 1920 | |
88d1aa9d MM |
1921 | for (p = &record_full_first; p != NULL; p = p->next) |
1922 | if (p->type == record_full_end) | |
d02ed0bb MM |
1923 | break; |
1924 | ||
88d1aa9d | 1925 | record_full_goto_entry (p); |
d02ed0bb MM |
1926 | } |
1927 | ||
1928 | /* The "to_goto_record_end" target method. */ | |
1929 | ||
1930 | static void | |
307a1b91 | 1931 | record_full_goto_end (struct target_ops *self) |
d02ed0bb | 1932 | { |
88d1aa9d | 1933 | struct record_full_entry *p = NULL; |
d02ed0bb | 1934 | |
88d1aa9d | 1935 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
1936 | ; |
1937 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 1938 | if (p->type == record_full_end) |
d02ed0bb MM |
1939 | break; |
1940 | ||
88d1aa9d | 1941 | record_full_goto_entry (p); |
d02ed0bb MM |
1942 | } |
1943 | ||
1944 | /* The "to_goto_record" target method. */ | |
1945 | ||
1946 | static void | |
606183ac | 1947 | record_full_goto (struct target_ops *self, ULONGEST target_insn) |
d02ed0bb | 1948 | { |
88d1aa9d | 1949 | struct record_full_entry *p = NULL; |
d02ed0bb | 1950 | |
88d1aa9d MM |
1951 | for (p = &record_full_first; p != NULL; p = p->next) |
1952 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
1953 | break; |
1954 | ||
88d1aa9d | 1955 | record_full_goto_entry (p); |
d02ed0bb MM |
1956 | } |
1957 | ||
797094dd MM |
1958 | /* The "to_record_stop_replaying" target method. */ |
1959 | ||
1960 | static void | |
1961 | record_full_stop_replaying (struct target_ops *self) | |
1962 | { | |
1963 | record_full_goto_end (self); | |
1964 | } | |
1965 | ||
d02ed0bb | 1966 | static void |
88d1aa9d | 1967 | init_record_full_ops (void) |
d02ed0bb | 1968 | { |
88d1aa9d MM |
1969 | record_full_ops.to_shortname = "record-full"; |
1970 | record_full_ops.to_longname = "Process record and replay target"; | |
1971 | record_full_ops.to_doc = | |
d02ed0bb | 1972 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
1973 | record_full_ops.to_open = record_full_open; |
1974 | record_full_ops.to_close = record_full_close; | |
b7d2e916 | 1975 | record_full_ops.to_async = record_full_async; |
88d1aa9d | 1976 | record_full_ops.to_resume = record_full_resume; |
85ad3aaf | 1977 | record_full_ops.to_commit_resume = record_full_commit_resume; |
88d1aa9d | 1978 | record_full_ops.to_wait = record_full_wait; |
7c1687a9 MM |
1979 | record_full_ops.to_disconnect = record_disconnect; |
1980 | record_full_ops.to_detach = record_detach; | |
1981 | record_full_ops.to_mourn_inferior = record_mourn_inferior; | |
1982 | record_full_ops.to_kill = record_kill; | |
88d1aa9d MM |
1983 | record_full_ops.to_store_registers = record_full_store_registers; |
1984 | record_full_ops.to_xfer_partial = record_full_xfer_partial; | |
1985 | record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint; | |
1986 | record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint; | |
1987 | record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint; | |
1988 | record_full_ops.to_stopped_data_address = record_full_stopped_data_address; | |
9e8915c6 PA |
1989 | record_full_ops.to_stopped_by_sw_breakpoint |
1990 | = record_full_stopped_by_sw_breakpoint; | |
1991 | record_full_ops.to_supports_stopped_by_sw_breakpoint | |
1992 | = record_full_supports_stopped_by_sw_breakpoint; | |
1993 | record_full_ops.to_stopped_by_hw_breakpoint | |
1994 | = record_full_stopped_by_hw_breakpoint; | |
1995 | record_full_ops.to_supports_stopped_by_hw_breakpoint | |
1996 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
1997 | record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse; |
1998 | record_full_ops.to_stratum = record_stratum; | |
d02ed0bb | 1999 | /* Add bookmark target methods. */ |
88d1aa9d MM |
2000 | record_full_ops.to_get_bookmark = record_full_get_bookmark; |
2001 | record_full_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d | 2002 | record_full_ops.to_execution_direction = record_full_execution_direction; |
b158a20f | 2003 | record_full_ops.to_record_method = record_full_record_method; |
88d1aa9d MM |
2004 | record_full_ops.to_info_record = record_full_info; |
2005 | record_full_ops.to_save_record = record_full_save; | |
2006 | record_full_ops.to_delete_record = record_full_delete; | |
2007 | record_full_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 2008 | record_full_ops.to_record_will_replay = record_full_will_replay; |
797094dd | 2009 | record_full_ops.to_record_stop_replaying = record_full_stop_replaying; |
88d1aa9d MM |
2010 | record_full_ops.to_goto_record_begin = record_full_goto_begin; |
2011 | record_full_ops.to_goto_record_end = record_full_goto_end; | |
2012 | record_full_ops.to_goto_record = record_full_goto; | |
2013 | record_full_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2014 | } |
2015 | ||
2016 | /* "to_resume" method for prec over corefile. */ | |
2017 | ||
2018 | static void | |
88d1aa9d MM |
2019 | record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step, |
2020 | enum gdb_signal signal) | |
d02ed0bb | 2021 | { |
88d1aa9d MM |
2022 | record_full_resume_step = step; |
2023 | record_full_resumed = 1; | |
2024 | record_full_execution_dir = execution_direction; | |
d02ed0bb MM |
2025 | |
2026 | /* We are about to start executing the inferior (or simulate it), | |
2027 | let's register it with the event loop. */ | |
2028 | if (target_can_async_p ()) | |
6a3753b3 | 2029 | target_async (1); |
d02ed0bb MM |
2030 | } |
2031 | ||
2032 | /* "to_kill" method for prec over corefile. */ | |
2033 | ||
2034 | static void | |
88d1aa9d | 2035 | record_full_core_kill (struct target_ops *ops) |
d02ed0bb MM |
2036 | { |
2037 | if (record_debug) | |
88d1aa9d | 2038 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2039 | |
88d1aa9d | 2040 | unpush_target (&record_full_core_ops); |
d02ed0bb MM |
2041 | } |
2042 | ||
2043 | /* "to_fetch_registers" method for prec over corefile. */ | |
2044 | ||
2045 | static void | |
88d1aa9d MM |
2046 | record_full_core_fetch_registers (struct target_ops *ops, |
2047 | struct regcache *regcache, | |
2048 | int regno) | |
d02ed0bb MM |
2049 | { |
2050 | if (regno < 0) | |
2051 | { | |
2052 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
2053 | int i; | |
2054 | ||
2055 | for (i = 0; i < num; i ++) | |
2056 | regcache_raw_supply (regcache, i, | |
88d1aa9d | 2057 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb MM |
2058 | } |
2059 | else | |
2060 | regcache_raw_supply (regcache, regno, | |
88d1aa9d | 2061 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2062 | } |
2063 | ||
2064 | /* "to_prepare_to_store" method for prec over corefile. */ | |
2065 | ||
2066 | static void | |
f32dbf8c MM |
2067 | record_full_core_prepare_to_store (struct target_ops *self, |
2068 | struct regcache *regcache) | |
d02ed0bb MM |
2069 | { |
2070 | } | |
2071 | ||
2072 | /* "to_store_registers" method for prec over corefile. */ | |
2073 | ||
2074 | static void | |
88d1aa9d | 2075 | record_full_core_store_registers (struct target_ops *ops, |
d02ed0bb MM |
2076 | struct regcache *regcache, |
2077 | int regno) | |
2078 | { | |
88d1aa9d | 2079 | if (record_full_gdb_operation_disable) |
d02ed0bb | 2080 | regcache_raw_collect (regcache, regno, |
88d1aa9d | 2081 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2082 | else |
2083 | error (_("You can't do that without a process to debug.")); | |
2084 | } | |
2085 | ||
2086 | /* "to_xfer_partial" method for prec over corefile. */ | |
2087 | ||
9b409511 | 2088 | static enum target_xfer_status |
88d1aa9d MM |
2089 | record_full_core_xfer_partial (struct target_ops *ops, |
2090 | enum target_object object, | |
2091 | const char *annex, gdb_byte *readbuf, | |
2092 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 2093 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb MM |
2094 | { |
2095 | if (object == TARGET_OBJECT_MEMORY) | |
2096 | { | |
88d1aa9d | 2097 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb MM |
2098 | { |
2099 | struct target_section *p; | |
2100 | ||
88d1aa9d | 2101 | for (p = record_full_core_start; p < record_full_core_end; p++) |
d02ed0bb MM |
2102 | { |
2103 | if (offset >= p->addr) | |
2104 | { | |
88d1aa9d | 2105 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2106 | ULONGEST sec_offset; |
2107 | ||
2108 | if (offset >= p->endaddr) | |
2109 | continue; | |
2110 | ||
2111 | if (offset + len > p->endaddr) | |
2112 | len = p->endaddr - offset; | |
2113 | ||
2114 | sec_offset = offset - p->addr; | |
2115 | ||
2116 | /* Read readbuf or write writebuf p, offset, len. */ | |
2117 | /* Check flags. */ | |
2118 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2119 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2120 | { | |
2121 | if (readbuf) | |
2122 | memset (readbuf, 0, len); | |
9b409511 YQ |
2123 | |
2124 | *xfered_len = len; | |
2125 | return TARGET_XFER_OK; | |
d02ed0bb | 2126 | } |
88d1aa9d MM |
2127 | /* Get record_full_core_buf_entry. */ |
2128 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb MM |
2129 | entry = entry->prev) |
2130 | if (entry->p == p) | |
2131 | break; | |
2132 | if (writebuf) | |
2133 | { | |
2134 | if (!entry) | |
2135 | { | |
2136 | /* Add a new entry. */ | |
8d749320 | 2137 | entry = XNEW (struct record_full_core_buf_entry); |
d02ed0bb | 2138 | entry->p = p; |
2b2848e2 DE |
2139 | if (!bfd_malloc_and_get_section |
2140 | (p->the_bfd_section->owner, | |
2141 | p->the_bfd_section, | |
2142 | &entry->buf)) | |
d02ed0bb MM |
2143 | { |
2144 | xfree (entry); | |
9b409511 | 2145 | return TARGET_XFER_EOF; |
d02ed0bb | 2146 | } |
88d1aa9d MM |
2147 | entry->prev = record_full_core_buf_list; |
2148 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2149 | } |
2150 | ||
2151 | memcpy (entry->buf + sec_offset, writebuf, | |
2152 | (size_t) len); | |
2153 | } | |
2154 | else | |
2155 | { | |
2156 | if (!entry) | |
6b84065d TT |
2157 | return ops->beneath->to_xfer_partial (ops->beneath, |
2158 | object, annex, | |
2159 | readbuf, writebuf, | |
2160 | offset, len, | |
2161 | xfered_len); | |
d02ed0bb MM |
2162 | |
2163 | memcpy (readbuf, entry->buf + sec_offset, | |
2164 | (size_t) len); | |
2165 | } | |
2166 | ||
9b409511 YQ |
2167 | *xfered_len = len; |
2168 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2169 | } |
2170 | } | |
2171 | ||
2ed4b548 | 2172 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2173 | } |
2174 | else | |
2175 | error (_("You can't do that without a process to debug.")); | |
2176 | } | |
2177 | ||
6b84065d TT |
2178 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2179 | readbuf, writebuf, offset, len, | |
2180 | xfered_len); | |
d02ed0bb MM |
2181 | } |
2182 | ||
2183 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2184 | ||
2185 | static int | |
3db08215 MM |
2186 | record_full_core_insert_breakpoint (struct target_ops *ops, |
2187 | struct gdbarch *gdbarch, | |
88d1aa9d | 2188 | struct bp_target_info *bp_tgt) |
d02ed0bb MM |
2189 | { |
2190 | return 0; | |
2191 | } | |
2192 | ||
2193 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2194 | ||
2195 | static int | |
3db08215 MM |
2196 | record_full_core_remove_breakpoint (struct target_ops *ops, |
2197 | struct gdbarch *gdbarch, | |
73971819 PA |
2198 | struct bp_target_info *bp_tgt, |
2199 | enum remove_bp_reason reason) | |
d02ed0bb MM |
2200 | { |
2201 | return 0; | |
2202 | } | |
2203 | ||
2204 | /* "to_has_execution" method for prec over corefile. */ | |
2205 | ||
2206 | static int | |
88d1aa9d | 2207 | record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid) |
d02ed0bb MM |
2208 | { |
2209 | return 1; | |
2210 | } | |
2211 | ||
2212 | static void | |
88d1aa9d | 2213 | init_record_full_core_ops (void) |
d02ed0bb | 2214 | { |
88d1aa9d MM |
2215 | record_full_core_ops.to_shortname = "record-core"; |
2216 | record_full_core_ops.to_longname = "Process record and replay target"; | |
2217 | record_full_core_ops.to_doc = | |
d02ed0bb | 2218 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
2219 | record_full_core_ops.to_open = record_full_open; |
2220 | record_full_core_ops.to_close = record_full_close; | |
b7d2e916 | 2221 | record_full_core_ops.to_async = record_full_async; |
88d1aa9d MM |
2222 | record_full_core_ops.to_resume = record_full_core_resume; |
2223 | record_full_core_ops.to_wait = record_full_wait; | |
2224 | record_full_core_ops.to_kill = record_full_core_kill; | |
2225 | record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers; | |
2226 | record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store; | |
2227 | record_full_core_ops.to_store_registers = record_full_core_store_registers; | |
2228 | record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial; | |
2229 | record_full_core_ops.to_insert_breakpoint | |
2230 | = record_full_core_insert_breakpoint; | |
2231 | record_full_core_ops.to_remove_breakpoint | |
2232 | = record_full_core_remove_breakpoint; | |
2233 | record_full_core_ops.to_stopped_by_watchpoint | |
2234 | = record_full_stopped_by_watchpoint; | |
2235 | record_full_core_ops.to_stopped_data_address | |
2236 | = record_full_stopped_data_address; | |
9e8915c6 PA |
2237 | record_full_core_ops.to_stopped_by_sw_breakpoint |
2238 | = record_full_stopped_by_sw_breakpoint; | |
2239 | record_full_core_ops.to_supports_stopped_by_sw_breakpoint | |
2240 | = record_full_supports_stopped_by_sw_breakpoint; | |
2241 | record_full_core_ops.to_stopped_by_hw_breakpoint | |
2242 | = record_full_stopped_by_hw_breakpoint; | |
2243 | record_full_core_ops.to_supports_stopped_by_hw_breakpoint | |
2244 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
2245 | record_full_core_ops.to_can_execute_reverse |
2246 | = record_full_can_execute_reverse; | |
2247 | record_full_core_ops.to_has_execution = record_full_core_has_execution; | |
2248 | record_full_core_ops.to_stratum = record_stratum; | |
d02ed0bb | 2249 | /* Add bookmark target methods. */ |
88d1aa9d MM |
2250 | record_full_core_ops.to_get_bookmark = record_full_get_bookmark; |
2251 | record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
2252 | record_full_core_ops.to_execution_direction |
2253 | = record_full_execution_direction; | |
b158a20f | 2254 | record_full_core_ops.to_record_method = record_full_record_method; |
88d1aa9d MM |
2255 | record_full_core_ops.to_info_record = record_full_info; |
2256 | record_full_core_ops.to_delete_record = record_full_delete; | |
2257 | record_full_core_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 2258 | record_full_core_ops.to_record_will_replay = record_full_will_replay; |
88d1aa9d MM |
2259 | record_full_core_ops.to_goto_record_begin = record_full_goto_begin; |
2260 | record_full_core_ops.to_goto_record_end = record_full_goto_end; | |
2261 | record_full_core_ops.to_goto_record = record_full_goto; | |
2262 | record_full_core_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2263 | } |
2264 | ||
2265 | /* Record log save-file format | |
2266 | Version 1 (never released) | |
2267 | ||
2268 | Header: | |
2269 | 4 bytes: magic number htonl(0x20090829). | |
2270 | NOTE: be sure to change whenever this file format changes! | |
2271 | ||
2272 | Records: | |
88d1aa9d MM |
2273 | record_full_end: |
2274 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2275 | record_full_reg: | |
2276 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2277 | 8 bytes: register id (network byte order). |
2278 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2279 | record_full_mem: |
2280 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2281 | 8 bytes: memory length (network byte order). |
2282 | 8 bytes: memory address (network byte order). | |
2283 | n bytes: memory value (n == memory length). | |
2284 | ||
2285 | Version 2 | |
2286 | 4 bytes: magic number netorder32(0x20091016). | |
2287 | NOTE: be sure to change whenever this file format changes! | |
2288 | ||
2289 | Records: | |
88d1aa9d MM |
2290 | record_full_end: |
2291 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2292 | 4 bytes: signal |
2293 | 4 bytes: instruction count | |
88d1aa9d MM |
2294 | record_full_reg: |
2295 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2296 | 4 bytes: register id (network byte order). |
2297 | n bytes: register value (n == actual register size). | |
2298 | (eg. 4 bytes for x86 general registers). | |
88d1aa9d MM |
2299 | record_full_mem: |
2300 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2301 | 4 bytes: memory length (network byte order). |
2302 | 8 bytes: memory address (network byte order). | |
2303 | n bytes: memory value (n == memory length). | |
2304 | ||
2305 | */ | |
2306 | ||
2307 | /* bfdcore_read -- read bytes from a core file section. */ | |
2308 | ||
2309 | static inline void | |
2310 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2311 | { | |
2312 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2313 | ||
2314 | if (ret) | |
2315 | *offset += len; | |
2316 | else | |
2317 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2318 | len, bfd_get_filename (obfd), | |
2319 | bfd_errmsg (bfd_get_error ())); | |
2320 | } | |
2321 | ||
2322 | static inline uint64_t | |
2323 | netorder64 (uint64_t input) | |
2324 | { | |
2325 | uint64_t ret; | |
2326 | ||
2327 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2328 | BFD_ENDIAN_BIG, input); | |
2329 | return ret; | |
2330 | } | |
2331 | ||
2332 | static inline uint32_t | |
2333 | netorder32 (uint32_t input) | |
2334 | { | |
2335 | uint32_t ret; | |
2336 | ||
2337 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2338 | BFD_ENDIAN_BIG, input); | |
2339 | return ret; | |
2340 | } | |
2341 | ||
2342 | static inline uint16_t | |
2343 | netorder16 (uint16_t input) | |
2344 | { | |
2345 | uint16_t ret; | |
2346 | ||
2347 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2348 | BFD_ENDIAN_BIG, input); | |
2349 | return ret; | |
2350 | } | |
2351 | ||
2352 | /* Restore the execution log from a core_bfd file. */ | |
2353 | static void | |
88d1aa9d | 2354 | record_full_restore (void) |
d02ed0bb MM |
2355 | { |
2356 | uint32_t magic; | |
2357 | struct cleanup *old_cleanups; | |
88d1aa9d | 2358 | struct record_full_entry *rec; |
d02ed0bb MM |
2359 | asection *osec; |
2360 | uint32_t osec_size; | |
2361 | int bfd_offset = 0; | |
2362 | struct regcache *regcache; | |
2363 | ||
2364 | /* We restore the execution log from the open core bfd, | |
2365 | if there is one. */ | |
2366 | if (core_bfd == NULL) | |
2367 | return; | |
2368 | ||
88d1aa9d MM |
2369 | /* "record_full_restore" can only be called when record list is empty. */ |
2370 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2371 | |
2372 | if (record_debug) | |
2373 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2374 | ||
2375 | /* Now need to find our special note section. */ | |
2376 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2377 | if (record_debug) | |
2378 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2379 | osec ? "succeeded" : "failed"); | |
2380 | if (osec == NULL) | |
2381 | return; | |
2382 | osec_size = bfd_section_size (core_bfd, osec); | |
2383 | if (record_debug) | |
2384 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); | |
2385 | ||
2386 | /* Check the magic code. */ | |
2387 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2388 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2389 | error (_("Version mis-match or file format error in core file %s."), |
2390 | bfd_get_filename (core_bfd)); | |
2391 | if (record_debug) | |
2392 | fprintf_unfiltered (gdb_stdlog, | |
2393 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2394 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2395 | phex_nz (netorder32 (magic), 4)); |
2396 | ||
88d1aa9d MM |
2397 | /* Restore the entries in recfd into record_full_arch_list_head and |
2398 | record_full_arch_list_tail. */ | |
2399 | record_full_arch_list_head = NULL; | |
2400 | record_full_arch_list_tail = NULL; | |
2401 | record_full_insn_num = 0; | |
2402 | old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb MM |
2403 | regcache = get_current_regcache (); |
2404 | ||
2405 | while (1) | |
2406 | { | |
2407 | uint8_t rectype; | |
2408 | uint32_t regnum, len, signal, count; | |
2409 | uint64_t addr; | |
2410 | ||
2411 | /* We are finished when offset reaches osec_size. */ | |
2412 | if (bfd_offset >= osec_size) | |
2413 | break; | |
2414 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
2415 | ||
2416 | switch (rectype) | |
2417 | { | |
88d1aa9d | 2418 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2419 | /* Get register number to regnum. */ |
2420 | bfdcore_read (core_bfd, osec, ®num, | |
2421 | sizeof (regnum), &bfd_offset); | |
2422 | regnum = netorder32 (regnum); | |
2423 | ||
88d1aa9d | 2424 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb MM |
2425 | |
2426 | /* Get val. */ | |
88d1aa9d | 2427 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2428 | rec->u.reg.len, &bfd_offset); |
2429 | ||
2430 | if (record_debug) | |
2431 | fprintf_unfiltered (gdb_stdlog, | |
2432 | " Reading register %d (1 " | |
2433 | "plus %lu plus %d bytes)\n", | |
2434 | rec->u.reg.num, | |
2435 | (unsigned long) sizeof (regnum), | |
2436 | rec->u.reg.len); | |
2437 | break; | |
2438 | ||
88d1aa9d | 2439 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2440 | /* Get len. */ |
2441 | bfdcore_read (core_bfd, osec, &len, | |
2442 | sizeof (len), &bfd_offset); | |
2443 | len = netorder32 (len); | |
2444 | ||
2445 | /* Get addr. */ | |
2446 | bfdcore_read (core_bfd, osec, &addr, | |
2447 | sizeof (addr), &bfd_offset); | |
2448 | addr = netorder64 (addr); | |
2449 | ||
88d1aa9d | 2450 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb MM |
2451 | |
2452 | /* Get val. */ | |
88d1aa9d | 2453 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2454 | rec->u.mem.len, &bfd_offset); |
2455 | ||
2456 | if (record_debug) | |
2457 | fprintf_unfiltered (gdb_stdlog, | |
2458 | " Reading memory %s (1 plus " | |
2459 | "%lu plus %lu plus %d bytes)\n", | |
2460 | paddress (get_current_arch (), | |
2461 | rec->u.mem.addr), | |
2462 | (unsigned long) sizeof (addr), | |
2463 | (unsigned long) sizeof (len), | |
2464 | rec->u.mem.len); | |
2465 | break; | |
2466 | ||
88d1aa9d MM |
2467 | case record_full_end: /* end */ |
2468 | rec = record_full_end_alloc (); | |
2469 | record_full_insn_num ++; | |
d02ed0bb MM |
2470 | |
2471 | /* Get signal value. */ | |
2472 | bfdcore_read (core_bfd, osec, &signal, | |
2473 | sizeof (signal), &bfd_offset); | |
2474 | signal = netorder32 (signal); | |
aead7601 | 2475 | rec->u.end.sigval = (enum gdb_signal) signal; |
d02ed0bb MM |
2476 | |
2477 | /* Get insn count. */ | |
2478 | bfdcore_read (core_bfd, osec, &count, | |
2479 | sizeof (count), &bfd_offset); | |
2480 | count = netorder32 (count); | |
2481 | rec->u.end.insn_num = count; | |
88d1aa9d | 2482 | record_full_insn_count = count + 1; |
d02ed0bb MM |
2483 | if (record_debug) |
2484 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2485 | " Reading record_full_end (1 + " |
d02ed0bb MM |
2486 | "%lu + %lu bytes), offset == %s\n", |
2487 | (unsigned long) sizeof (signal), | |
2488 | (unsigned long) sizeof (count), | |
2489 | paddress (get_current_arch (), | |
2490 | bfd_offset)); | |
2491 | break; | |
2492 | ||
2493 | default: | |
2494 | error (_("Bad entry type in core file %s."), | |
2495 | bfd_get_filename (core_bfd)); | |
2496 | break; | |
2497 | } | |
2498 | ||
2499 | /* Add rec to record arch list. */ | |
88d1aa9d | 2500 | record_full_arch_list_add (rec); |
d02ed0bb MM |
2501 | } |
2502 | ||
2503 | discard_cleanups (old_cleanups); | |
2504 | ||
88d1aa9d MM |
2505 | /* Add record_full_arch_list_head to the end of record list. */ |
2506 | record_full_first.next = record_full_arch_list_head; | |
2507 | record_full_arch_list_head->prev = &record_full_first; | |
2508 | record_full_arch_list_tail->next = NULL; | |
2509 | record_full_list = &record_full_first; | |
d02ed0bb | 2510 | |
88d1aa9d MM |
2511 | /* Update record_full_insn_max_num. */ |
2512 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2513 | { |
88d1aa9d | 2514 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2515 | warning (_("Auto increase record/replay buffer limit to %u."), |
88d1aa9d | 2516 | record_full_insn_max_num); |
d02ed0bb MM |
2517 | } |
2518 | ||
2519 | /* Succeeded. */ | |
2520 | printf_filtered (_("Restored records from core file %s.\n"), | |
2521 | bfd_get_filename (core_bfd)); | |
2522 | ||
08d72866 | 2523 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2524 | } |
2525 | ||
2526 | /* bfdcore_write -- write bytes into a core file section. */ | |
2527 | ||
2528 | static inline void | |
2529 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2530 | { | |
2531 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2532 | ||
2533 | if (ret) | |
2534 | *offset += len; | |
2535 | else | |
2536 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2537 | len, bfd_get_filename (obfd), | |
2538 | bfd_errmsg (bfd_get_error ())); | |
2539 | } | |
2540 | ||
2541 | /* Restore the execution log from a file. We use a modified elf | |
2542 | corefile format, with an extra section for our data. */ | |
2543 | ||
2544 | static void | |
88d1aa9d | 2545 | cmd_record_full_restore (char *args, int from_tty) |
d02ed0bb MM |
2546 | { |
2547 | core_file_command (args, from_tty); | |
88d1aa9d | 2548 | record_full_open (args, from_tty); |
d02ed0bb MM |
2549 | } |
2550 | ||
d02ed0bb MM |
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; | |
d02ed0bb | 2561 | struct cleanup *set_cleanups; |
d02ed0bb MM |
2562 | int save_size = 0; |
2563 | asection *osec = NULL; | |
2564 | int bfd_offset = 0; | |
2565 | ||
2566 | /* Open the save file. */ | |
2567 | if (record_debug) | |
2568 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2569 | recfilename); | |
2570 | ||
2571 | /* Open the output file. */ | |
bef155c3 TT |
2572 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (recfilename)); |
2573 | ||
2574 | /* Arrange to remove the output file on failure. */ | |
2575 | gdb::unlinker unlink_file (recfilename); | |
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. */ | |
bef155c3 | 2618 | osec = bfd_make_section_anyway_with_flags (obfd.get (), "precord", |
d02ed0bb MM |
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 ())); | |
bef155c3 TT |
2625 | bfd_set_section_size (obfd.get (), osec, save_size); |
2626 | bfd_set_section_vma (obfd.get (), osec, 0); | |
2627 | bfd_set_section_alignment (obfd.get (), osec, 0); | |
2628 | bfd_section_lma (obfd.get (), osec) = 0; | |
d02ed0bb MM |
2629 | |
2630 | /* Save corefile state. */ | |
bef155c3 | 2631 | write_gcore_file (obfd.get ()); |
d02ed0bb MM |
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 | 2640 | phex_nz (magic, 4)); |
bef155c3 | 2641 | bfdcore_write (obfd.get (), osec, &magic, sizeof (magic), &bfd_offset); |
d02ed0bb MM |
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; |
bef155c3 | 2656 | bfdcore_write (obfd.get (), osec, &type, sizeof (type), &bfd_offset); |
d02ed0bb | 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); |
bef155c3 | 2671 | bfdcore_write (obfd.get (), osec, ®num, |
d02ed0bb MM |
2672 | sizeof (regnum), &bfd_offset); |
2673 | ||
2674 | /* Write regval. */ | |
bef155c3 | 2675 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
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); |
bef155c3 TT |
2693 | bfdcore_write (obfd.get (), osec, &len, sizeof (len), |
2694 | &bfd_offset); | |
d02ed0bb MM |
2695 | |
2696 | /* Write memaddr. */ | |
88d1aa9d | 2697 | addr = netorder64 (record_full_list->u.mem.addr); |
bef155c3 | 2698 | bfdcore_write (obfd.get (), osec, &addr, |
d02ed0bb MM |
2699 | sizeof (addr), &bfd_offset); |
2700 | ||
2701 | /* Write memval. */ | |
bef155c3 | 2702 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2703 | record_full_get_loc (record_full_list), |
2704 | record_full_list->u.mem.len, &bfd_offset); | |
d02ed0bb MM |
2705 | break; |
2706 | ||
88d1aa9d | 2707 | case record_full_end: |
d02ed0bb MM |
2708 | if (record_debug) |
2709 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2710 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2711 | "%lu + %lu bytes)\n", |
2712 | (unsigned long) sizeof (signal), | |
2713 | (unsigned long) sizeof (count)); | |
2714 | /* Write signal value. */ | |
88d1aa9d | 2715 | signal = netorder32 (record_full_list->u.end.sigval); |
bef155c3 | 2716 | bfdcore_write (obfd.get (), osec, &signal, |
d02ed0bb MM |
2717 | sizeof (signal), &bfd_offset); |
2718 | ||
2719 | /* Write insn count. */ | |
88d1aa9d | 2720 | count = netorder32 (record_full_list->u.end.insn_num); |
bef155c3 | 2721 | bfdcore_write (obfd.get (), osec, &count, |
d02ed0bb MM |
2722 | sizeof (count), &bfd_offset); |
2723 | break; | |
2724 | } | |
2725 | } | |
2726 | ||
2727 | /* Execute entry. */ | |
88d1aa9d | 2728 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2729 | |
88d1aa9d MM |
2730 | if (record_full_list->next) |
2731 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
2732 | else |
2733 | break; | |
2734 | } | |
2735 | ||
88d1aa9d | 2736 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2737 | while (1) |
2738 | { | |
2739 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2740 | if (record_full_list == cur_record_full_list) |
d02ed0bb MM |
2741 | break; |
2742 | ||
88d1aa9d | 2743 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2744 | |
88d1aa9d MM |
2745 | if (record_full_list->prev) |
2746 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2747 | } |
2748 | ||
2749 | do_cleanups (set_cleanups); | |
bef155c3 | 2750 | unlink_file.keep (); |
d02ed0bb MM |
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 | 2790 | { |
9b2eba3d | 2791 | execute_command ((char *) "target record-full", from_tty); |
d02ed0bb MM |
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 | } |