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d02ed0bb MM |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
618f726f | 3 | Copyright (C) 2013-2016 Free Software Foundation, Inc. |
d02ed0bb MM |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdbcmd.h" | |
22 | #include "regcache.h" | |
23 | #include "gdbthread.h" | |
24 | #include "event-top.h" | |
d02ed0bb MM |
25 | #include "completer.h" |
26 | #include "arch-utils.h" | |
27 | #include "gdbcore.h" | |
28 | #include "exec.h" | |
29 | #include "record.h" | |
30 | #include "record-full.h" | |
31 | #include "elf-bfd.h" | |
32 | #include "gcore.h" | |
33 | #include "event-loop.h" | |
34 | #include "inf-loop.h" | |
35 | #include "gdb_bfd.h" | |
36 | #include "observer.h" | |
45741a9c | 37 | #include "infrun.h" |
d02ed0bb MM |
38 | |
39 | #include <signal.h> | |
40 | ||
41 | /* This module implements "target record-full", also known as "process | |
42 | record and replay". This target sits on top of a "normal" target | |
43 | (a target that "has execution"), and provides a record and replay | |
44 | functionality, including reverse debugging. | |
45 | ||
46 | Target record has two modes: recording, and replaying. | |
47 | ||
48 | In record mode, we intercept the to_resume and to_wait methods. | |
49 | Whenever gdb resumes the target, we run the target in single step | |
50 | mode, and we build up an execution log in which, for each executed | |
51 | instruction, we record all changes in memory and register state. | |
52 | This is invisible to the user, to whom it just looks like an | |
53 | ordinary debugging session (except for performance degredation). | |
54 | ||
55 | In replay mode, instead of actually letting the inferior run as a | |
56 | process, we simulate its execution by playing back the recorded | |
57 | execution log. For each instruction in the log, we simulate the | |
58 | instruction's side effects by duplicating the changes that it would | |
59 | have made on memory and registers. */ | |
60 | ||
88d1aa9d | 61 | #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000 |
d02ed0bb | 62 | |
88d1aa9d MM |
63 | #define RECORD_FULL_IS_REPLAY \ |
64 | (record_full_list->next || execution_direction == EXEC_REVERSE) | |
d02ed0bb | 65 | |
88d1aa9d | 66 | #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016) |
d02ed0bb MM |
67 | |
68 | /* These are the core structs of the process record functionality. | |
69 | ||
88d1aa9d MM |
70 | A record_full_entry is a record of the value change of a register |
71 | ("record_full_reg") or a part of memory ("record_full_mem"). And each | |
72 | instruction must have a struct record_full_entry ("record_full_end") | |
73 | that indicates that this is the last struct record_full_entry of this | |
d02ed0bb MM |
74 | instruction. |
75 | ||
88d1aa9d MM |
76 | Each struct record_full_entry is linked to "record_full_list" by "prev" |
77 | and "next" pointers. */ | |
d02ed0bb | 78 | |
88d1aa9d | 79 | struct record_full_mem_entry |
d02ed0bb MM |
80 | { |
81 | CORE_ADDR addr; | |
82 | int len; | |
83 | /* Set this flag if target memory for this entry | |
84 | can no longer be accessed. */ | |
85 | int mem_entry_not_accessible; | |
86 | union | |
87 | { | |
88 | gdb_byte *ptr; | |
89 | gdb_byte buf[sizeof (gdb_byte *)]; | |
90 | } u; | |
91 | }; | |
92 | ||
88d1aa9d | 93 | struct record_full_reg_entry |
d02ed0bb MM |
94 | { |
95 | unsigned short num; | |
96 | unsigned short len; | |
97 | union | |
98 | { | |
99 | gdb_byte *ptr; | |
100 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
101 | } u; | |
102 | }; | |
103 | ||
88d1aa9d | 104 | struct record_full_end_entry |
d02ed0bb MM |
105 | { |
106 | enum gdb_signal sigval; | |
107 | ULONGEST insn_num; | |
108 | }; | |
109 | ||
88d1aa9d | 110 | enum record_full_type |
d02ed0bb | 111 | { |
88d1aa9d MM |
112 | record_full_end = 0, |
113 | record_full_reg, | |
114 | record_full_mem | |
d02ed0bb MM |
115 | }; |
116 | ||
117 | /* This is the data structure that makes up the execution log. | |
118 | ||
119 | The execution log consists of a single linked list of entries | |
88d1aa9d | 120 | of type "struct record_full_entry". It is doubly linked so that it |
d02ed0bb MM |
121 | can be traversed in either direction. |
122 | ||
123 | The start of the list is anchored by a struct called | |
88d1aa9d MM |
124 | "record_full_first". The pointer "record_full_list" either points |
125 | to the last entry that was added to the list (in record mode), or to | |
126 | the next entry in the list that will be executed (in replay mode). | |
d02ed0bb | 127 | |
88d1aa9d MM |
128 | Each list element (struct record_full_entry), in addition to next |
129 | and prev pointers, consists of a union of three entry types: mem, | |
130 | reg, and end. A field called "type" determines which entry type is | |
d02ed0bb MM |
131 | represented by a given list element. |
132 | ||
133 | Each instruction that is added to the execution log is represented | |
134 | by a variable number of list elements ('entries'). The instruction | |
135 | will have one "reg" entry for each register that is changed by | |
136 | executing the instruction (including the PC in every case). It | |
137 | will also have one "mem" entry for each memory change. Finally, | |
138 | each instruction will have an "end" entry that separates it from | |
139 | the changes associated with the next instruction. */ | |
140 | ||
88d1aa9d | 141 | struct record_full_entry |
d02ed0bb | 142 | { |
88d1aa9d MM |
143 | struct record_full_entry *prev; |
144 | struct record_full_entry *next; | |
145 | enum record_full_type type; | |
d02ed0bb MM |
146 | union |
147 | { | |
148 | /* reg */ | |
88d1aa9d | 149 | struct record_full_reg_entry reg; |
d02ed0bb | 150 | /* mem */ |
88d1aa9d | 151 | struct record_full_mem_entry mem; |
d02ed0bb | 152 | /* end */ |
88d1aa9d | 153 | struct record_full_end_entry end; |
d02ed0bb MM |
154 | } u; |
155 | }; | |
156 | ||
157 | /* If true, query if PREC cannot record memory | |
158 | change of next instruction. */ | |
25ea693b | 159 | int record_full_memory_query = 0; |
d02ed0bb | 160 | |
88d1aa9d | 161 | struct record_full_core_buf_entry |
d02ed0bb | 162 | { |
88d1aa9d | 163 | struct record_full_core_buf_entry *prev; |
d02ed0bb MM |
164 | struct target_section *p; |
165 | bfd_byte *buf; | |
166 | }; | |
167 | ||
168 | /* Record buf with core target. */ | |
88d1aa9d MM |
169 | static gdb_byte *record_full_core_regbuf = NULL; |
170 | static struct target_section *record_full_core_start; | |
171 | static struct target_section *record_full_core_end; | |
172 | static struct record_full_core_buf_entry *record_full_core_buf_list = NULL; | |
d02ed0bb MM |
173 | |
174 | /* The following variables are used for managing the linked list that | |
175 | represents the execution log. | |
176 | ||
88d1aa9d MM |
177 | record_full_first is the anchor that holds down the beginning of |
178 | the list. | |
d02ed0bb | 179 | |
88d1aa9d | 180 | record_full_list serves two functions: |
d02ed0bb MM |
181 | 1) In record mode, it anchors the end of the list. |
182 | 2) In replay mode, it traverses the list and points to | |
183 | the next instruction that must be emulated. | |
184 | ||
88d1aa9d MM |
185 | record_full_arch_list_head and record_full_arch_list_tail are used |
186 | to manage a separate list, which is used to build up the change | |
187 | elements of the currently executing instruction during record mode. | |
188 | When this instruction has been completely annotated in the "arch | |
189 | list", it will be appended to the main execution log. */ | |
d02ed0bb | 190 | |
88d1aa9d MM |
191 | static struct record_full_entry record_full_first; |
192 | static struct record_full_entry *record_full_list = &record_full_first; | |
193 | static struct record_full_entry *record_full_arch_list_head = NULL; | |
194 | static struct record_full_entry *record_full_arch_list_tail = NULL; | |
d02ed0bb | 195 | |
88d1aa9d MM |
196 | /* 1 ask user. 0 auto delete the last struct record_full_entry. */ |
197 | static int record_full_stop_at_limit = 1; | |
d02ed0bb | 198 | /* Maximum allowed number of insns in execution log. */ |
88d1aa9d MM |
199 | static unsigned int record_full_insn_max_num |
200 | = DEFAULT_RECORD_FULL_INSN_MAX_NUM; | |
d02ed0bb | 201 | /* Actual count of insns presently in execution log. */ |
7ee70bf5 | 202 | static unsigned int record_full_insn_num = 0; |
d02ed0bb MM |
203 | /* Count of insns logged so far (may be larger |
204 | than count of insns presently in execution log). */ | |
88d1aa9d | 205 | static ULONGEST record_full_insn_count; |
d02ed0bb MM |
206 | |
207 | /* The target_ops of process record. */ | |
88d1aa9d MM |
208 | static struct target_ops record_full_ops; |
209 | static struct target_ops record_full_core_ops; | |
d02ed0bb | 210 | |
8213266a PA |
211 | /* See record-full.h. */ |
212 | ||
213 | int | |
214 | record_full_is_used (void) | |
215 | { | |
216 | struct target_ops *t; | |
217 | ||
218 | t = find_record_target (); | |
219 | return (t == &record_full_ops | |
220 | || t == &record_full_core_ops); | |
221 | } | |
222 | ||
223 | ||
d02ed0bb MM |
224 | /* Command lists for "set/show record full". */ |
225 | static struct cmd_list_element *set_record_full_cmdlist; | |
226 | static struct cmd_list_element *show_record_full_cmdlist; | |
227 | ||
228 | /* Command list for "record full". */ | |
229 | static struct cmd_list_element *record_full_cmdlist; | |
230 | ||
88d1aa9d MM |
231 | static void record_full_goto_insn (struct record_full_entry *entry, |
232 | enum exec_direction_kind dir); | |
1390f529 TT |
233 | static void record_full_save (struct target_ops *self, |
234 | const char *recfilename); | |
88d1aa9d MM |
235 | |
236 | /* Alloc and free functions for record_full_reg, record_full_mem, and | |
237 | record_full_end entries. */ | |
238 | ||
239 | /* Alloc a record_full_reg record entry. */ | |
240 | ||
241 | static inline struct record_full_entry * | |
242 | record_full_reg_alloc (struct regcache *regcache, int regnum) | |
243 | { | |
244 | struct record_full_entry *rec; | |
d02ed0bb MM |
245 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
246 | ||
8d749320 | 247 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 248 | rec->type = record_full_reg; |
d02ed0bb MM |
249 | rec->u.reg.num = regnum; |
250 | rec->u.reg.len = register_size (gdbarch, regnum); | |
251 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
252 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
253 | ||
254 | return rec; | |
255 | } | |
256 | ||
88d1aa9d | 257 | /* Free a record_full_reg record entry. */ |
d02ed0bb MM |
258 | |
259 | static inline void | |
88d1aa9d | 260 | record_full_reg_release (struct record_full_entry *rec) |
d02ed0bb | 261 | { |
88d1aa9d | 262 | gdb_assert (rec->type == record_full_reg); |
d02ed0bb MM |
263 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
264 | xfree (rec->u.reg.u.ptr); | |
265 | xfree (rec); | |
266 | } | |
267 | ||
88d1aa9d | 268 | /* Alloc a record_full_mem record entry. */ |
d02ed0bb | 269 | |
88d1aa9d MM |
270 | static inline struct record_full_entry * |
271 | record_full_mem_alloc (CORE_ADDR addr, int len) | |
d02ed0bb | 272 | { |
88d1aa9d | 273 | struct record_full_entry *rec; |
d02ed0bb | 274 | |
8d749320 | 275 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 276 | rec->type = record_full_mem; |
d02ed0bb MM |
277 | rec->u.mem.addr = addr; |
278 | rec->u.mem.len = len; | |
279 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
280 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
281 | ||
282 | return rec; | |
283 | } | |
284 | ||
88d1aa9d | 285 | /* Free a record_full_mem record entry. */ |
d02ed0bb MM |
286 | |
287 | static inline void | |
88d1aa9d | 288 | record_full_mem_release (struct record_full_entry *rec) |
d02ed0bb | 289 | { |
88d1aa9d | 290 | gdb_assert (rec->type == record_full_mem); |
d02ed0bb MM |
291 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
292 | xfree (rec->u.mem.u.ptr); | |
293 | xfree (rec); | |
294 | } | |
295 | ||
88d1aa9d | 296 | /* Alloc a record_full_end record entry. */ |
d02ed0bb | 297 | |
88d1aa9d MM |
298 | static inline struct record_full_entry * |
299 | record_full_end_alloc (void) | |
d02ed0bb | 300 | { |
88d1aa9d | 301 | struct record_full_entry *rec; |
d02ed0bb | 302 | |
8d749320 | 303 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 304 | rec->type = record_full_end; |
d02ed0bb MM |
305 | |
306 | return rec; | |
307 | } | |
308 | ||
88d1aa9d | 309 | /* Free a record_full_end record entry. */ |
d02ed0bb MM |
310 | |
311 | static inline void | |
88d1aa9d | 312 | record_full_end_release (struct record_full_entry *rec) |
d02ed0bb MM |
313 | { |
314 | xfree (rec); | |
315 | } | |
316 | ||
317 | /* Free one record entry, any type. | |
318 | Return entry->type, in case caller wants to know. */ | |
319 | ||
88d1aa9d MM |
320 | static inline enum record_full_type |
321 | record_full_entry_release (struct record_full_entry *rec) | |
d02ed0bb | 322 | { |
88d1aa9d | 323 | enum record_full_type type = rec->type; |
d02ed0bb MM |
324 | |
325 | switch (type) { | |
88d1aa9d MM |
326 | case record_full_reg: |
327 | record_full_reg_release (rec); | |
d02ed0bb | 328 | break; |
88d1aa9d MM |
329 | case record_full_mem: |
330 | record_full_mem_release (rec); | |
d02ed0bb | 331 | break; |
88d1aa9d MM |
332 | case record_full_end: |
333 | record_full_end_release (rec); | |
d02ed0bb MM |
334 | break; |
335 | } | |
336 | return type; | |
337 | } | |
338 | ||
339 | /* Free all record entries in list pointed to by REC. */ | |
340 | ||
341 | static void | |
88d1aa9d | 342 | record_full_list_release (struct record_full_entry *rec) |
d02ed0bb MM |
343 | { |
344 | if (!rec) | |
345 | return; | |
346 | ||
347 | while (rec->next) | |
348 | rec = rec->next; | |
349 | ||
350 | while (rec->prev) | |
351 | { | |
352 | rec = rec->prev; | |
88d1aa9d | 353 | record_full_entry_release (rec->next); |
d02ed0bb MM |
354 | } |
355 | ||
88d1aa9d | 356 | if (rec == &record_full_first) |
d02ed0bb | 357 | { |
88d1aa9d MM |
358 | record_full_insn_num = 0; |
359 | record_full_first.next = NULL; | |
d02ed0bb MM |
360 | } |
361 | else | |
88d1aa9d | 362 | record_full_entry_release (rec); |
d02ed0bb MM |
363 | } |
364 | ||
365 | /* Free all record entries forward of the given list position. */ | |
366 | ||
367 | static void | |
88d1aa9d | 368 | record_full_list_release_following (struct record_full_entry *rec) |
d02ed0bb | 369 | { |
88d1aa9d | 370 | struct record_full_entry *tmp = rec->next; |
d02ed0bb MM |
371 | |
372 | rec->next = NULL; | |
373 | while (tmp) | |
374 | { | |
375 | rec = tmp->next; | |
88d1aa9d | 376 | if (record_full_entry_release (tmp) == record_full_end) |
d02ed0bb | 377 | { |
88d1aa9d MM |
378 | record_full_insn_num--; |
379 | record_full_insn_count--; | |
d02ed0bb MM |
380 | } |
381 | tmp = rec; | |
382 | } | |
383 | } | |
384 | ||
385 | /* Delete the first instruction from the beginning of the log, to make | |
386 | room for adding a new instruction at the end of the log. | |
387 | ||
88d1aa9d | 388 | Note -- this function does not modify record_full_insn_num. */ |
d02ed0bb MM |
389 | |
390 | static void | |
88d1aa9d | 391 | record_full_list_release_first (void) |
d02ed0bb | 392 | { |
88d1aa9d | 393 | struct record_full_entry *tmp; |
d02ed0bb | 394 | |
88d1aa9d | 395 | if (!record_full_first.next) |
d02ed0bb MM |
396 | return; |
397 | ||
88d1aa9d | 398 | /* Loop until a record_full_end. */ |
d02ed0bb MM |
399 | while (1) |
400 | { | |
88d1aa9d MM |
401 | /* Cut record_full_first.next out of the linked list. */ |
402 | tmp = record_full_first.next; | |
403 | record_full_first.next = tmp->next; | |
404 | tmp->next->prev = &record_full_first; | |
d02ed0bb MM |
405 | |
406 | /* tmp is now isolated, and can be deleted. */ | |
88d1aa9d MM |
407 | if (record_full_entry_release (tmp) == record_full_end) |
408 | break; /* End loop at first record_full_end. */ | |
d02ed0bb | 409 | |
88d1aa9d | 410 | if (!record_full_first.next) |
d02ed0bb | 411 | { |
88d1aa9d | 412 | gdb_assert (record_full_insn_num == 1); |
d02ed0bb MM |
413 | break; /* End loop when list is empty. */ |
414 | } | |
415 | } | |
416 | } | |
417 | ||
88d1aa9d | 418 | /* Add a struct record_full_entry to record_full_arch_list. */ |
d02ed0bb MM |
419 | |
420 | static void | |
88d1aa9d | 421 | record_full_arch_list_add (struct record_full_entry *rec) |
d02ed0bb MM |
422 | { |
423 | if (record_debug > 1) | |
424 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 425 | "Process record: record_full_arch_list_add %s.\n", |
d02ed0bb MM |
426 | host_address_to_string (rec)); |
427 | ||
88d1aa9d | 428 | if (record_full_arch_list_tail) |
d02ed0bb | 429 | { |
88d1aa9d MM |
430 | record_full_arch_list_tail->next = rec; |
431 | rec->prev = record_full_arch_list_tail; | |
432 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
433 | } |
434 | else | |
435 | { | |
88d1aa9d MM |
436 | record_full_arch_list_head = rec; |
437 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
438 | } |
439 | } | |
440 | ||
441 | /* Return the value storage location of a record entry. */ | |
442 | static inline gdb_byte * | |
88d1aa9d | 443 | record_full_get_loc (struct record_full_entry *rec) |
d02ed0bb MM |
444 | { |
445 | switch (rec->type) { | |
88d1aa9d | 446 | case record_full_mem: |
d02ed0bb MM |
447 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
448 | return rec->u.mem.u.ptr; | |
449 | else | |
450 | return rec->u.mem.u.buf; | |
88d1aa9d | 451 | case record_full_reg: |
d02ed0bb MM |
452 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
453 | return rec->u.reg.u.ptr; | |
454 | else | |
455 | return rec->u.reg.u.buf; | |
88d1aa9d | 456 | case record_full_end: |
d02ed0bb | 457 | default: |
88d1aa9d | 458 | gdb_assert_not_reached ("unexpected record_full_entry type"); |
d02ed0bb MM |
459 | return NULL; |
460 | } | |
461 | } | |
462 | ||
88d1aa9d | 463 | /* Record the value of a register NUM to record_full_arch_list. */ |
d02ed0bb MM |
464 | |
465 | int | |
25ea693b | 466 | record_full_arch_list_add_reg (struct regcache *regcache, int regnum) |
d02ed0bb | 467 | { |
88d1aa9d | 468 | struct record_full_entry *rec; |
d02ed0bb MM |
469 | |
470 | if (record_debug > 1) | |
471 | fprintf_unfiltered (gdb_stdlog, | |
472 | "Process record: add register num = %d to " | |
473 | "record list.\n", | |
474 | regnum); | |
475 | ||
88d1aa9d | 476 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 477 | |
88d1aa9d | 478 | regcache_raw_read (regcache, regnum, record_full_get_loc (rec)); |
d02ed0bb | 479 | |
88d1aa9d | 480 | record_full_arch_list_add (rec); |
d02ed0bb MM |
481 | |
482 | return 0; | |
483 | } | |
484 | ||
485 | /* Record the value of a region of memory whose address is ADDR and | |
88d1aa9d | 486 | length is LEN to record_full_arch_list. */ |
d02ed0bb MM |
487 | |
488 | int | |
25ea693b | 489 | record_full_arch_list_add_mem (CORE_ADDR addr, int len) |
d02ed0bb | 490 | { |
88d1aa9d | 491 | struct record_full_entry *rec; |
d02ed0bb MM |
492 | |
493 | if (record_debug > 1) | |
494 | fprintf_unfiltered (gdb_stdlog, | |
495 | "Process record: add mem addr = %s len = %d to " | |
496 | "record list.\n", | |
497 | paddress (target_gdbarch (), addr), len); | |
498 | ||
499 | if (!addr) /* FIXME: Why? Some arch must permit it... */ | |
500 | return 0; | |
501 | ||
88d1aa9d | 502 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb | 503 | |
88d1aa9d MM |
504 | if (record_read_memory (target_gdbarch (), addr, |
505 | record_full_get_loc (rec), len)) | |
d02ed0bb | 506 | { |
88d1aa9d | 507 | record_full_mem_release (rec); |
d02ed0bb MM |
508 | return -1; |
509 | } | |
510 | ||
88d1aa9d | 511 | record_full_arch_list_add (rec); |
d02ed0bb MM |
512 | |
513 | return 0; | |
514 | } | |
515 | ||
88d1aa9d MM |
516 | /* Add a record_full_end type struct record_full_entry to |
517 | record_full_arch_list. */ | |
d02ed0bb MM |
518 | |
519 | int | |
25ea693b | 520 | record_full_arch_list_add_end (void) |
d02ed0bb | 521 | { |
88d1aa9d | 522 | struct record_full_entry *rec; |
d02ed0bb MM |
523 | |
524 | if (record_debug > 1) | |
525 | fprintf_unfiltered (gdb_stdlog, | |
526 | "Process record: add end to arch list.\n"); | |
527 | ||
88d1aa9d | 528 | rec = record_full_end_alloc (); |
d02ed0bb | 529 | rec->u.end.sigval = GDB_SIGNAL_0; |
88d1aa9d | 530 | rec->u.end.insn_num = ++record_full_insn_count; |
d02ed0bb | 531 | |
88d1aa9d | 532 | record_full_arch_list_add (rec); |
d02ed0bb MM |
533 | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static void | |
88d1aa9d | 538 | record_full_check_insn_num (int set_terminal) |
d02ed0bb | 539 | { |
7ee70bf5 | 540 | if (record_full_insn_num == record_full_insn_max_num) |
d02ed0bb | 541 | { |
7ee70bf5 PA |
542 | /* Ask user what to do. */ |
543 | if (record_full_stop_at_limit) | |
d02ed0bb | 544 | { |
7ee70bf5 PA |
545 | int q; |
546 | ||
547 | if (set_terminal) | |
548 | target_terminal_ours (); | |
549 | q = yquery (_("Do you want to auto delete previous execution " | |
550 | "log entries when record/replay buffer becomes " | |
551 | "full (record full stop-at-limit)?")); | |
552 | if (set_terminal) | |
553 | target_terminal_inferior (); | |
554 | if (q) | |
555 | record_full_stop_at_limit = 0; | |
556 | else | |
557 | error (_("Process record: stopped by user.")); | |
d02ed0bb MM |
558 | } |
559 | } | |
560 | } | |
561 | ||
562 | static void | |
88d1aa9d | 563 | record_full_arch_list_cleanups (void *ignore) |
d02ed0bb | 564 | { |
88d1aa9d | 565 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
566 | } |
567 | ||
568 | /* Before inferior step (when GDB record the running message, inferior | |
569 | only can step), GDB will call this function to record the values to | |
88d1aa9d | 570 | record_full_list. This function will call gdbarch_process_record to |
d02ed0bb | 571 | record the running message of inferior and set them to |
88d1aa9d | 572 | record_full_arch_list, and add it to record_full_list. */ |
d02ed0bb MM |
573 | |
574 | static int | |
88d1aa9d | 575 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
576 | { |
577 | int ret; | |
578 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
88d1aa9d MM |
579 | struct cleanup *old_cleanups |
580 | = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb | 581 | |
88d1aa9d MM |
582 | record_full_arch_list_head = NULL; |
583 | record_full_arch_list_tail = NULL; | |
d02ed0bb | 584 | |
88d1aa9d MM |
585 | /* Check record_full_insn_num. */ |
586 | record_full_check_insn_num (1); | |
d02ed0bb MM |
587 | |
588 | /* If gdb sends a signal value to target_resume, | |
589 | save it in the 'end' field of the previous instruction. | |
590 | ||
591 | Maybe process record should record what really happened, | |
592 | rather than what gdb pretends has happened. | |
593 | ||
594 | So if Linux delivered the signal to the child process during | |
595 | the record mode, we will record it and deliver it again in | |
596 | the replay mode. | |
597 | ||
598 | If user says "ignore this signal" during the record mode, then | |
599 | it will be ignored again during the replay mode (no matter if | |
600 | the user says something different, like "deliver this signal" | |
601 | during the replay mode). | |
602 | ||
603 | User should understand that nothing he does during the replay | |
604 | mode will change the behavior of the child. If he tries, | |
605 | then that is a user error. | |
606 | ||
607 | But we should still deliver the signal to gdb during the replay, | |
608 | if we delivered it during the recording. Therefore we should | |
88d1aa9d MM |
609 | record the signal during record_full_wait, not |
610 | record_full_resume. */ | |
611 | if (record_full_list != &record_full_first) /* FIXME better way to check */ | |
d02ed0bb | 612 | { |
88d1aa9d MM |
613 | gdb_assert (record_full_list->type == record_full_end); |
614 | record_full_list->u.end.sigval = signal; | |
d02ed0bb MM |
615 | } |
616 | ||
617 | if (signal == GDB_SIGNAL_0 | |
618 | || !gdbarch_process_record_signal_p (gdbarch)) | |
619 | ret = gdbarch_process_record (gdbarch, | |
620 | regcache, | |
621 | regcache_read_pc (regcache)); | |
622 | else | |
623 | ret = gdbarch_process_record_signal (gdbarch, | |
624 | regcache, | |
625 | signal); | |
626 | ||
627 | if (ret > 0) | |
628 | error (_("Process record: inferior program stopped.")); | |
629 | if (ret < 0) | |
630 | error (_("Process record: failed to record execution log.")); | |
631 | ||
632 | discard_cleanups (old_cleanups); | |
633 | ||
88d1aa9d MM |
634 | record_full_list->next = record_full_arch_list_head; |
635 | record_full_arch_list_head->prev = record_full_list; | |
636 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 637 | |
7ee70bf5 | 638 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 639 | record_full_list_release_first (); |
d02ed0bb | 640 | else |
88d1aa9d | 641 | record_full_insn_num++; |
d02ed0bb MM |
642 | |
643 | return 1; | |
644 | } | |
645 | ||
88d1aa9d | 646 | struct record_full_message_args { |
d02ed0bb MM |
647 | struct regcache *regcache; |
648 | enum gdb_signal signal; | |
649 | }; | |
650 | ||
651 | static int | |
88d1aa9d | 652 | record_full_message_wrapper (void *args) |
d02ed0bb | 653 | { |
19ba03f4 SM |
654 | struct record_full_message_args *record_full_args |
655 | = (struct record_full_message_args *) args; | |
d02ed0bb | 656 | |
88d1aa9d MM |
657 | return record_full_message (record_full_args->regcache, |
658 | record_full_args->signal); | |
d02ed0bb MM |
659 | } |
660 | ||
661 | static int | |
88d1aa9d MM |
662 | record_full_message_wrapper_safe (struct regcache *regcache, |
663 | enum gdb_signal signal) | |
d02ed0bb | 664 | { |
88d1aa9d | 665 | struct record_full_message_args args; |
d02ed0bb MM |
666 | |
667 | args.regcache = regcache; | |
668 | args.signal = signal; | |
669 | ||
7cc53fba | 670 | return catch_errors (record_full_message_wrapper, &args, "", |
88d1aa9d | 671 | RETURN_MASK_ALL); |
d02ed0bb MM |
672 | } |
673 | ||
88d1aa9d | 674 | /* Set to 1 if record_full_store_registers and record_full_xfer_partial |
d02ed0bb MM |
675 | doesn't need record. */ |
676 | ||
88d1aa9d | 677 | static int record_full_gdb_operation_disable = 0; |
d02ed0bb MM |
678 | |
679 | struct cleanup * | |
25ea693b | 680 | record_full_gdb_operation_disable_set (void) |
d02ed0bb MM |
681 | { |
682 | struct cleanup *old_cleanups = NULL; | |
683 | ||
684 | old_cleanups = | |
88d1aa9d MM |
685 | make_cleanup_restore_integer (&record_full_gdb_operation_disable); |
686 | record_full_gdb_operation_disable = 1; | |
d02ed0bb MM |
687 | |
688 | return old_cleanups; | |
689 | } | |
690 | ||
691 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ | |
9e8915c6 PA |
692 | static enum target_stop_reason record_full_stop_reason |
693 | = TARGET_STOPPED_BY_NO_REASON; | |
d02ed0bb MM |
694 | |
695 | /* Execute one instruction from the record log. Each instruction in | |
696 | the log will be represented by an arbitrary sequence of register | |
697 | entries and memory entries, followed by an 'end' entry. */ | |
698 | ||
699 | static inline void | |
88d1aa9d MM |
700 | record_full_exec_insn (struct regcache *regcache, |
701 | struct gdbarch *gdbarch, | |
702 | struct record_full_entry *entry) | |
d02ed0bb MM |
703 | { |
704 | switch (entry->type) | |
705 | { | |
88d1aa9d | 706 | case record_full_reg: /* reg */ |
d02ed0bb MM |
707 | { |
708 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
709 | ||
710 | if (record_debug > 1) | |
711 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 712 | "Process record: record_full_reg %s to " |
d02ed0bb MM |
713 | "inferior num = %d.\n", |
714 | host_address_to_string (entry), | |
715 | entry->u.reg.num); | |
716 | ||
717 | regcache_cooked_read (regcache, entry->u.reg.num, reg); | |
718 | regcache_cooked_write (regcache, entry->u.reg.num, | |
88d1aa9d MM |
719 | record_full_get_loc (entry)); |
720 | memcpy (record_full_get_loc (entry), reg, entry->u.reg.len); | |
d02ed0bb MM |
721 | } |
722 | break; | |
723 | ||
88d1aa9d | 724 | case record_full_mem: /* mem */ |
d02ed0bb MM |
725 | { |
726 | /* Nothing to do if the entry is flagged not_accessible. */ | |
727 | if (!entry->u.mem.mem_entry_not_accessible) | |
728 | { | |
394816ee MK |
729 | gdb_byte *mem = (gdb_byte *) xmalloc (entry->u.mem.len); |
730 | struct cleanup *cleanup = make_cleanup (xfree, mem); | |
d02ed0bb MM |
731 | |
732 | if (record_debug > 1) | |
733 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 734 | "Process record: record_full_mem %s to " |
d02ed0bb MM |
735 | "inferior addr = %s len = %d.\n", |
736 | host_address_to_string (entry), | |
737 | paddress (gdbarch, entry->u.mem.addr), | |
738 | entry->u.mem.len); | |
739 | ||
740 | if (record_read_memory (gdbarch, | |
741 | entry->u.mem.addr, mem, entry->u.mem.len)) | |
742 | entry->u.mem.mem_entry_not_accessible = 1; | |
743 | else | |
744 | { | |
745 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 746 | record_full_get_loc (entry), |
d02ed0bb MM |
747 | entry->u.mem.len)) |
748 | { | |
749 | entry->u.mem.mem_entry_not_accessible = 1; | |
750 | if (record_debug) | |
751 | warning (_("Process record: error writing memory at " | |
752 | "addr = %s len = %d."), | |
753 | paddress (gdbarch, entry->u.mem.addr), | |
754 | entry->u.mem.len); | |
755 | } | |
756 | else | |
757 | { | |
88d1aa9d MM |
758 | memcpy (record_full_get_loc (entry), mem, |
759 | entry->u.mem.len); | |
d02ed0bb MM |
760 | |
761 | /* We've changed memory --- check if a hardware | |
762 | watchpoint should trap. Note that this | |
763 | presently assumes the target beneath supports | |
764 | continuable watchpoints. On non-continuable | |
765 | watchpoints target, we'll want to check this | |
766 | _before_ actually doing the memory change, and | |
767 | not doing the change at all if the watchpoint | |
768 | traps. */ | |
769 | if (hardware_watchpoint_inserted_in_range | |
770 | (get_regcache_aspace (regcache), | |
771 | entry->u.mem.addr, entry->u.mem.len)) | |
9e8915c6 | 772 | record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb MM |
773 | } |
774 | } | |
394816ee MK |
775 | |
776 | do_cleanups (cleanup); | |
d02ed0bb MM |
777 | } |
778 | } | |
779 | break; | |
780 | } | |
781 | } | |
782 | ||
88d1aa9d | 783 | static void record_full_restore (void); |
d02ed0bb MM |
784 | |
785 | /* Asynchronous signal handle registered as event loop source for when | |
786 | we have pending events ready to be passed to the core. */ | |
787 | ||
88d1aa9d | 788 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
789 | |
790 | static void | |
88d1aa9d | 791 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb MM |
792 | { |
793 | inferior_event_handler (INF_REG_EVENT, NULL); | |
794 | } | |
795 | ||
796 | /* Open the process record target. */ | |
797 | ||
798 | static void | |
014f9477 | 799 | record_full_core_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
800 | { |
801 | struct regcache *regcache = get_current_regcache (); | |
802 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
803 | int i; | |
804 | ||
88d1aa9d | 805 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 806 | target_fetch_registers (regcache, -1); |
224c3ddb | 807 | record_full_core_regbuf = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE * regnum); |
d02ed0bb MM |
808 | for (i = 0; i < regnum; i ++) |
809 | regcache_raw_collect (regcache, i, | |
88d1aa9d | 810 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb | 811 | |
88d1aa9d MM |
812 | /* Get record_full_core_start and record_full_core_end. */ |
813 | if (build_section_table (core_bfd, &record_full_core_start, | |
814 | &record_full_core_end)) | |
d02ed0bb | 815 | { |
88d1aa9d MM |
816 | xfree (record_full_core_regbuf); |
817 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
818 | error (_("\"%s\": Can't find sections: %s"), |
819 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
820 | } | |
821 | ||
88d1aa9d MM |
822 | push_target (&record_full_core_ops); |
823 | record_full_restore (); | |
d02ed0bb MM |
824 | } |
825 | ||
826 | /* "to_open" target method for 'live' processes. */ | |
827 | ||
828 | static void | |
014f9477 | 829 | record_full_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
830 | { |
831 | if (record_debug) | |
88d1aa9d | 832 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb MM |
833 | |
834 | /* check exec */ | |
835 | if (!target_has_execution) | |
836 | error (_("Process record: the program is not being run.")); | |
837 | if (non_stop) | |
838 | error (_("Process record target can't debug inferior in non-stop mode " | |
839 | "(non-stop).")); | |
840 | ||
841 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
842 | error (_("Process record: the current architecture doesn't support " | |
843 | "record function.")); | |
844 | ||
88d1aa9d | 845 | push_target (&record_full_ops); |
d02ed0bb MM |
846 | } |
847 | ||
88d1aa9d | 848 | static void record_full_init_record_breakpoints (void); |
d02ed0bb MM |
849 | |
850 | /* "to_open" target method. Open the process record target. */ | |
851 | ||
852 | static void | |
014f9477 | 853 | record_full_open (const char *name, int from_tty) |
d02ed0bb MM |
854 | { |
855 | struct target_ops *t; | |
856 | ||
857 | if (record_debug) | |
88d1aa9d | 858 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 859 | |
8213266a | 860 | record_preopen (); |
d02ed0bb | 861 | |
d02ed0bb | 862 | /* Reset */ |
88d1aa9d MM |
863 | record_full_insn_num = 0; |
864 | record_full_insn_count = 0; | |
865 | record_full_list = &record_full_first; | |
866 | record_full_list->next = NULL; | |
d02ed0bb | 867 | |
d02ed0bb | 868 | if (core_bfd) |
88d1aa9d | 869 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 870 | else |
88d1aa9d | 871 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
872 | |
873 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
874 | record_full_async_inferior_event_token |
875 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
d02ed0bb MM |
876 | NULL); |
877 | ||
88d1aa9d | 878 | record_full_init_record_breakpoints (); |
d02ed0bb MM |
879 | |
880 | observer_notify_record_changed (current_inferior (), 1); | |
881 | } | |
882 | ||
883 | /* "to_close" target method. Close the process record target. */ | |
884 | ||
885 | static void | |
de90e03d | 886 | record_full_close (struct target_ops *self) |
d02ed0bb | 887 | { |
88d1aa9d | 888 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
889 | |
890 | if (record_debug) | |
88d1aa9d | 891 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 892 | |
88d1aa9d | 893 | record_full_list_release (record_full_list); |
d02ed0bb | 894 | |
88d1aa9d MM |
895 | /* Release record_full_core_regbuf. */ |
896 | if (record_full_core_regbuf) | |
d02ed0bb | 897 | { |
88d1aa9d MM |
898 | xfree (record_full_core_regbuf); |
899 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
900 | } |
901 | ||
88d1aa9d MM |
902 | /* Release record_full_core_buf_list. */ |
903 | if (record_full_core_buf_list) | |
d02ed0bb | 904 | { |
88d1aa9d MM |
905 | for (entry = record_full_core_buf_list->prev; entry; |
906 | entry = entry->prev) | |
d02ed0bb | 907 | { |
88d1aa9d MM |
908 | xfree (record_full_core_buf_list); |
909 | record_full_core_buf_list = entry; | |
d02ed0bb | 910 | } |
88d1aa9d | 911 | record_full_core_buf_list = NULL; |
d02ed0bb MM |
912 | } |
913 | ||
88d1aa9d MM |
914 | if (record_full_async_inferior_event_token) |
915 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
916 | } |
917 | ||
b7d2e916 PA |
918 | /* "to_async" target method. */ |
919 | ||
920 | static void | |
6a3753b3 | 921 | record_full_async (struct target_ops *ops, int enable) |
b7d2e916 | 922 | { |
6a3753b3 | 923 | if (enable) |
b7d2e916 PA |
924 | mark_async_event_handler (record_full_async_inferior_event_token); |
925 | else | |
926 | clear_async_event_handler (record_full_async_inferior_event_token); | |
927 | ||
6a3753b3 | 928 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
929 | } |
930 | ||
88d1aa9d | 931 | static int record_full_resume_step = 0; |
d02ed0bb | 932 | |
88d1aa9d MM |
933 | /* True if we've been resumed, and so each record_full_wait call should |
934 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 935 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 936 | static int record_full_resumed = 0; |
d02ed0bb MM |
937 | |
938 | /* The execution direction of the last resume we got. This is | |
939 | necessary for async mode. Vis (order is not strictly accurate): | |
940 | ||
941 | 1. user has the global execution direction set to forward | |
942 | 2. user does a reverse-step command | |
88d1aa9d | 943 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
944 | temporarily switched to reverse |
945 | 4. GDB's execution direction is reverted back to forward | |
946 | 5. target record notifies event loop there's an event to handle | |
947 | 6. infrun asks the target which direction was it going, and switches | |
948 | the global execution direction accordingly (to reverse) | |
949 | 7. infrun polls an event out of the record target, and handles it | |
950 | 8. GDB goes back to the event loop, and goto #4. | |
951 | */ | |
88d1aa9d | 952 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb MM |
953 | |
954 | /* "to_resume" target method. Resume the process record target. */ | |
955 | ||
956 | static void | |
88d1aa9d MM |
957 | record_full_resume (struct target_ops *ops, ptid_t ptid, int step, |
958 | enum gdb_signal signal) | |
d02ed0bb | 959 | { |
88d1aa9d MM |
960 | record_full_resume_step = step; |
961 | record_full_resumed = 1; | |
962 | record_full_execution_dir = execution_direction; | |
d02ed0bb | 963 | |
88d1aa9d | 964 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
965 | { |
966 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
967 | ||
88d1aa9d | 968 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
969 | |
970 | if (!step) | |
971 | { | |
972 | /* This is not hard single step. */ | |
973 | if (!gdbarch_software_single_step_p (gdbarch)) | |
974 | { | |
975 | /* This is a normal continue. */ | |
976 | step = 1; | |
977 | } | |
978 | else | |
979 | { | |
980 | /* This arch support soft sigle step. */ | |
34b7e8a6 | 981 | if (thread_has_single_step_breakpoints_set (inferior_thread ())) |
d02ed0bb MM |
982 | { |
983 | /* This is a soft single step. */ | |
88d1aa9d | 984 | record_full_resume_step = 1; |
d02ed0bb MM |
985 | } |
986 | else | |
987 | { | |
988 | /* This is a continue. | |
989 | Try to insert a soft single step breakpoint. */ | |
990 | if (!gdbarch_software_single_step (gdbarch, | |
991 | get_current_frame ())) | |
992 | { | |
993 | /* This system don't want use soft single step. | |
994 | Use hard sigle step. */ | |
995 | step = 1; | |
996 | } | |
997 | } | |
998 | } | |
999 | } | |
1000 | ||
1001 | /* Make sure the target beneath reports all signals. */ | |
1002 | target_pass_signals (0, NULL); | |
1003 | ||
6b84065d | 1004 | ops->beneath->to_resume (ops->beneath, ptid, step, signal); |
d02ed0bb MM |
1005 | } |
1006 | ||
1007 | /* We are about to start executing the inferior (or simulate it), | |
1008 | let's register it with the event loop. */ | |
1009 | if (target_can_async_p ()) | |
6a3753b3 | 1010 | target_async (1); |
d02ed0bb MM |
1011 | } |
1012 | ||
88d1aa9d | 1013 | static int record_full_get_sig = 0; |
d02ed0bb MM |
1014 | |
1015 | /* SIGINT signal handler, registered by "to_wait" method. */ | |
1016 | ||
1017 | static void | |
88d1aa9d | 1018 | record_full_sig_handler (int signo) |
d02ed0bb MM |
1019 | { |
1020 | if (record_debug) | |
1021 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1022 | ||
1023 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 1024 | record_full_resume_step = 1; |
d02ed0bb | 1025 | |
88d1aa9d | 1026 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1027 | SIGINT. */ |
88d1aa9d | 1028 | record_full_get_sig = 1; |
d02ed0bb MM |
1029 | } |
1030 | ||
1031 | static void | |
88d1aa9d | 1032 | record_full_wait_cleanups (void *ignore) |
d02ed0bb MM |
1033 | { |
1034 | if (execution_direction == EXEC_REVERSE) | |
1035 | { | |
88d1aa9d MM |
1036 | if (record_full_list->next) |
1037 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1038 | } |
1039 | else | |
88d1aa9d | 1040 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
1041 | } |
1042 | ||
1043 | /* "to_wait" target method for process record target. | |
1044 | ||
1045 | In record mode, the target is always run in singlestep mode | |
1046 | (even when gdb says to continue). The to_wait method intercepts | |
1047 | the stop events and determines which ones are to be passed on to | |
1048 | gdb. Most stop events are just singlestep events that gdb is not | |
1049 | to know about, so the to_wait method just records them and keeps | |
1050 | singlestepping. | |
1051 | ||
1052 | In replay mode, this function emulates the recorded execution log, | |
1053 | one instruction at a time (forward or backward), and determines | |
1054 | where to stop. */ | |
1055 | ||
1056 | static ptid_t | |
88d1aa9d MM |
1057 | record_full_wait_1 (struct target_ops *ops, |
1058 | ptid_t ptid, struct target_waitstatus *status, | |
1059 | int options) | |
d02ed0bb | 1060 | { |
25ea693b | 1061 | struct cleanup *set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
1062 | |
1063 | if (record_debug) | |
1064 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1065 | "Process record: record_full_wait " |
1066 | "record_full_resume_step = %d, " | |
1067 | "record_full_resumed = %d, direction=%s\n", | |
1068 | record_full_resume_step, record_full_resumed, | |
1069 | record_full_execution_dir == EXEC_FORWARD | |
1070 | ? "forward" : "reverse"); | |
1071 | ||
1072 | if (!record_full_resumed) | |
d02ed0bb MM |
1073 | { |
1074 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1075 | ||
1076 | /* No interesting event. */ | |
1077 | status->kind = TARGET_WAITKIND_IGNORE; | |
1078 | return minus_one_ptid; | |
1079 | } | |
1080 | ||
88d1aa9d MM |
1081 | record_full_get_sig = 0; |
1082 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1083 | |
9e8915c6 PA |
1084 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1085 | ||
88d1aa9d | 1086 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1087 | { |
88d1aa9d | 1088 | if (record_full_resume_step) |
d02ed0bb MM |
1089 | { |
1090 | /* This is a single step. */ | |
6b84065d | 1091 | return ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1092 | } |
1093 | else | |
1094 | { | |
1095 | /* This is not a single step. */ | |
1096 | ptid_t ret; | |
1097 | CORE_ADDR tmp_pc; | |
1098 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); | |
1099 | ||
1100 | while (1) | |
1101 | { | |
34b7e8a6 PA |
1102 | struct thread_info *tp; |
1103 | ||
6b84065d | 1104 | ret = ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1105 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1106 | { | |
1107 | if (record_debug) | |
1108 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1109 | "Process record: record_full_wait " |
d02ed0bb MM |
1110 | "target beneath not done yet\n"); |
1111 | return ret; | |
1112 | } | |
1113 | ||
34b7e8a6 PA |
1114 | ALL_NON_EXITED_THREADS (tp) |
1115 | delete_single_step_breakpoints (tp); | |
d02ed0bb | 1116 | |
88d1aa9d | 1117 | if (record_full_resume_step) |
d02ed0bb MM |
1118 | return ret; |
1119 | ||
1120 | /* Is this a SIGTRAP? */ | |
1121 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1122 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1123 | { | |
1124 | struct regcache *regcache; | |
1125 | struct address_space *aspace; | |
9e8915c6 PA |
1126 | enum target_stop_reason *stop_reason_p |
1127 | = &record_full_stop_reason; | |
d02ed0bb MM |
1128 | |
1129 | /* Yes -- this is likely our single-step finishing, | |
1130 | but check if there's any reason the core would be | |
1131 | interested in the event. */ | |
1132 | ||
1133 | registers_changed (); | |
1134 | regcache = get_current_regcache (); | |
1135 | tmp_pc = regcache_read_pc (regcache); | |
1136 | aspace = get_regcache_aspace (regcache); | |
1137 | ||
1138 | if (target_stopped_by_watchpoint ()) | |
1139 | { | |
1140 | /* Always interested in watchpoints. */ | |
1141 | } | |
9e8915c6 PA |
1142 | else if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1143 | stop_reason_p)) | |
d02ed0bb MM |
1144 | { |
1145 | /* There is a breakpoint here. Let the core | |
1146 | handle it. */ | |
d02ed0bb MM |
1147 | } |
1148 | else | |
1149 | { | |
1150 | /* This is a single-step trap. Record the | |
1151 | insn and issue another step. | |
1152 | FIXME: this part can be a random SIGTRAP too. | |
1153 | But GDB cannot handle it. */ | |
1154 | int step = 1; | |
1155 | ||
88d1aa9d MM |
1156 | if (!record_full_message_wrapper_safe (regcache, |
1157 | GDB_SIGNAL_0)) | |
d02ed0bb MM |
1158 | { |
1159 | status->kind = TARGET_WAITKIND_STOPPED; | |
1160 | status->value.sig = GDB_SIGNAL_0; | |
1161 | break; | |
1162 | } | |
1163 | ||
1164 | if (gdbarch_software_single_step_p (gdbarch)) | |
1165 | { | |
1166 | /* Try to insert the software single step breakpoint. | |
1167 | If insert success, set step to 0. */ | |
1168 | set_executing (inferior_ptid, 0); | |
1169 | reinit_frame_cache (); | |
1170 | if (gdbarch_software_single_step (gdbarch, | |
1171 | get_current_frame ())) | |
1172 | step = 0; | |
1173 | set_executing (inferior_ptid, 1); | |
1174 | } | |
1175 | ||
1176 | if (record_debug) | |
1177 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1178 | "Process record: record_full_wait " |
1179 | "issuing one more step in the " | |
1180 | "target beneath\n"); | |
6b84065d TT |
1181 | ops->beneath->to_resume (ops->beneath, ptid, step, |
1182 | GDB_SIGNAL_0); | |
d02ed0bb MM |
1183 | continue; |
1184 | } | |
1185 | } | |
1186 | ||
1187 | /* The inferior is broken by a breakpoint or a signal. */ | |
1188 | break; | |
1189 | } | |
1190 | ||
1191 | return ret; | |
1192 | } | |
1193 | } | |
1194 | else | |
1195 | { | |
1196 | struct regcache *regcache = get_current_regcache (); | |
1197 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1198 | struct address_space *aspace = get_regcache_aspace (regcache); | |
1199 | int continue_flag = 1; | |
88d1aa9d MM |
1200 | int first_record_full_end = 1; |
1201 | struct cleanup *old_cleanups | |
1202 | = make_cleanup (record_full_wait_cleanups, 0); | |
d02ed0bb MM |
1203 | CORE_ADDR tmp_pc; |
1204 | ||
9e8915c6 | 1205 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
d02ed0bb MM |
1206 | status->kind = TARGET_WAITKIND_STOPPED; |
1207 | ||
1208 | /* Check breakpoint when forward execute. */ | |
1209 | if (execution_direction == EXEC_FORWARD) | |
1210 | { | |
1211 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1212 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1213 | &record_full_stop_reason)) | |
d02ed0bb | 1214 | { |
d02ed0bb MM |
1215 | if (record_debug) |
1216 | fprintf_unfiltered (gdb_stdlog, | |
1217 | "Process record: break at %s.\n", | |
1218 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb MM |
1219 | goto replay_out; |
1220 | } | |
1221 | } | |
1222 | ||
1223 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
1224 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1225 | mode, because inferior will not executed. | |
1226 | Then set it to terminal_ours to make GDB get the signal. */ | |
1227 | target_terminal_ours (); | |
1228 | ||
88d1aa9d | 1229 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev |
d02ed0bb | 1230 | instruction. */ |
88d1aa9d MM |
1231 | if (execution_direction == EXEC_FORWARD && record_full_list->next) |
1232 | record_full_list = record_full_list->next; | |
d02ed0bb | 1233 | |
88d1aa9d | 1234 | /* Loop over the record_full_list, looking for the next place to |
d02ed0bb MM |
1235 | stop. */ |
1236 | do | |
1237 | { | |
1238 | /* Check for beginning and end of log. */ | |
1239 | if (execution_direction == EXEC_REVERSE | |
88d1aa9d | 1240 | && record_full_list == &record_full_first) |
d02ed0bb MM |
1241 | { |
1242 | /* Hit beginning of record log in reverse. */ | |
1243 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1244 | break; | |
1245 | } | |
88d1aa9d | 1246 | if (execution_direction != EXEC_REVERSE && !record_full_list->next) |
d02ed0bb MM |
1247 | { |
1248 | /* Hit end of record log going forward. */ | |
1249 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1250 | break; | |
1251 | } | |
1252 | ||
88d1aa9d | 1253 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 1254 | |
88d1aa9d | 1255 | if (record_full_list->type == record_full_end) |
d02ed0bb MM |
1256 | { |
1257 | if (record_debug > 1) | |
1258 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1259 | "Process record: record_full_end %s to " |
d02ed0bb | 1260 | "inferior.\n", |
88d1aa9d | 1261 | host_address_to_string (record_full_list)); |
d02ed0bb | 1262 | |
88d1aa9d | 1263 | if (first_record_full_end && execution_direction == EXEC_REVERSE) |
d02ed0bb | 1264 | { |
88d1aa9d MM |
1265 | /* When reverse excute, the first record_full_end is the |
1266 | part of current instruction. */ | |
1267 | first_record_full_end = 0; | |
d02ed0bb MM |
1268 | } |
1269 | else | |
1270 | { | |
88d1aa9d | 1271 | /* In EXEC_REVERSE mode, this is the record_full_end of prev |
d02ed0bb | 1272 | instruction. |
88d1aa9d MM |
1273 | In EXEC_FORWARD mode, this is the record_full_end of |
1274 | current instruction. */ | |
d02ed0bb | 1275 | /* step */ |
88d1aa9d | 1276 | if (record_full_resume_step) |
d02ed0bb MM |
1277 | { |
1278 | if (record_debug > 1) | |
1279 | fprintf_unfiltered (gdb_stdlog, | |
1280 | "Process record: step.\n"); | |
1281 | continue_flag = 0; | |
1282 | } | |
1283 | ||
1284 | /* check breakpoint */ | |
1285 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1286 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1287 | &record_full_stop_reason)) | |
d02ed0bb | 1288 | { |
d02ed0bb MM |
1289 | if (record_debug) |
1290 | fprintf_unfiltered (gdb_stdlog, | |
1291 | "Process record: break " | |
1292 | "at %s.\n", | |
1293 | paddress (gdbarch, tmp_pc)); | |
9e8915c6 | 1294 | |
d02ed0bb MM |
1295 | continue_flag = 0; |
1296 | } | |
1297 | ||
9e8915c6 | 1298 | if (record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT) |
d02ed0bb MM |
1299 | { |
1300 | if (record_debug) | |
1301 | fprintf_unfiltered (gdb_stdlog, | |
1302 | "Process record: hit hw " | |
1303 | "watchpoint.\n"); | |
1304 | continue_flag = 0; | |
1305 | } | |
1306 | /* Check target signal */ | |
88d1aa9d | 1307 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb MM |
1308 | /* FIXME: better way to check */ |
1309 | continue_flag = 0; | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | if (continue_flag) | |
1314 | { | |
1315 | if (execution_direction == EXEC_REVERSE) | |
1316 | { | |
88d1aa9d MM |
1317 | if (record_full_list->prev) |
1318 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
1319 | } |
1320 | else | |
1321 | { | |
88d1aa9d MM |
1322 | if (record_full_list->next) |
1323 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1324 | } |
1325 | } | |
1326 | } | |
1327 | while (continue_flag); | |
1328 | ||
1329 | replay_out: | |
88d1aa9d | 1330 | if (record_full_get_sig) |
d02ed0bb | 1331 | status->value.sig = GDB_SIGNAL_INT; |
88d1aa9d | 1332 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb | 1333 | /* FIXME: better way to check */ |
88d1aa9d | 1334 | status->value.sig = record_full_list->u.end.sigval; |
d02ed0bb MM |
1335 | else |
1336 | status->value.sig = GDB_SIGNAL_TRAP; | |
1337 | ||
1338 | discard_cleanups (old_cleanups); | |
1339 | } | |
1340 | ||
1341 | signal (SIGINT, handle_sigint); | |
1342 | ||
1343 | do_cleanups (set_cleanups); | |
1344 | return inferior_ptid; | |
1345 | } | |
1346 | ||
1347 | static ptid_t | |
88d1aa9d MM |
1348 | record_full_wait (struct target_ops *ops, |
1349 | ptid_t ptid, struct target_waitstatus *status, | |
1350 | int options) | |
d02ed0bb MM |
1351 | { |
1352 | ptid_t return_ptid; | |
1353 | ||
88d1aa9d | 1354 | return_ptid = record_full_wait_1 (ops, ptid, status, options); |
d02ed0bb MM |
1355 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1356 | { | |
1357 | /* We're reporting a stop. Make sure any spurious | |
1358 | target_wait(WNOHANG) doesn't advance the target until the | |
1359 | core wants us resumed again. */ | |
88d1aa9d | 1360 | record_full_resumed = 0; |
d02ed0bb MM |
1361 | } |
1362 | return return_ptid; | |
1363 | } | |
1364 | ||
1365 | static int | |
6a109b6b | 1366 | record_full_stopped_by_watchpoint (struct target_ops *ops) |
d02ed0bb | 1367 | { |
88d1aa9d | 1368 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1369 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1370 | else |
6b84065d | 1371 | return ops->beneath->to_stopped_by_watchpoint (ops->beneath); |
d02ed0bb MM |
1372 | } |
1373 | ||
d02ed0bb | 1374 | static int |
88d1aa9d | 1375 | record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) |
d02ed0bb | 1376 | { |
88d1aa9d | 1377 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1378 | return 0; |
1379 | else | |
6b84065d | 1380 | return ops->beneath->to_stopped_data_address (ops->beneath, addr_p); |
d02ed0bb MM |
1381 | } |
1382 | ||
9e8915c6 PA |
1383 | /* The to_stopped_by_sw_breakpoint method of target record-full. */ |
1384 | ||
1385 | static int | |
1386 | record_full_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1387 | { | |
1388 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1389 | } | |
1390 | ||
1391 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1392 | record-full. */ | |
1393 | ||
1394 | static int | |
1395 | record_full_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1396 | { | |
1397 | return 1; | |
1398 | } | |
1399 | ||
1400 | /* The to_stopped_by_hw_breakpoint method of target record-full. */ | |
1401 | ||
1402 | static int | |
1403 | record_full_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1404 | { | |
1405 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
1406 | } | |
1407 | ||
1408 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1409 | record-full. */ | |
1410 | ||
1411 | static int | |
1412 | record_full_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1413 | { | |
1414 | return 1; | |
1415 | } | |
1416 | ||
d02ed0bb MM |
1417 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1418 | ||
1419 | static void | |
88d1aa9d | 1420 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1421 | { |
88d1aa9d MM |
1422 | /* Check record_full_insn_num. */ |
1423 | record_full_check_insn_num (0); | |
d02ed0bb | 1424 | |
88d1aa9d MM |
1425 | record_full_arch_list_head = NULL; |
1426 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1427 | |
1428 | if (regnum < 0) | |
1429 | { | |
1430 | int i; | |
1431 | ||
1432 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
1433 | { | |
25ea693b | 1434 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1435 | { |
88d1aa9d | 1436 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1437 | error (_("Process record: failed to record execution log.")); |
1438 | } | |
1439 | } | |
1440 | } | |
1441 | else | |
1442 | { | |
25ea693b | 1443 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1444 | { |
88d1aa9d | 1445 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1446 | error (_("Process record: failed to record execution log.")); |
1447 | } | |
1448 | } | |
25ea693b | 1449 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1450 | { |
88d1aa9d | 1451 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1452 | error (_("Process record: failed to record execution log.")); |
1453 | } | |
88d1aa9d MM |
1454 | record_full_list->next = record_full_arch_list_head; |
1455 | record_full_arch_list_head->prev = record_full_list; | |
1456 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1457 | |
7ee70bf5 | 1458 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1459 | record_full_list_release_first (); |
d02ed0bb | 1460 | else |
88d1aa9d | 1461 | record_full_insn_num++; |
d02ed0bb MM |
1462 | } |
1463 | ||
1464 | /* "to_store_registers" method for process record target. */ | |
1465 | ||
1466 | static void | |
88d1aa9d MM |
1467 | record_full_store_registers (struct target_ops *ops, |
1468 | struct regcache *regcache, | |
1469 | int regno) | |
d02ed0bb | 1470 | { |
88d1aa9d | 1471 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1472 | { |
88d1aa9d | 1473 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1474 | { |
1475 | int n; | |
1476 | ||
1477 | /* Let user choose if he wants to write register or not. */ | |
1478 | if (regno < 0) | |
1479 | n = | |
1480 | query (_("Because GDB is in replay mode, changing the " | |
1481 | "value of a register will make the execution " | |
1482 | "log unusable from this point onward. " | |
1483 | "Change all registers?")); | |
1484 | else | |
1485 | n = | |
1486 | query (_("Because GDB is in replay mode, changing the value " | |
1487 | "of a register will make the execution log unusable " | |
1488 | "from this point onward. Change register %s?"), | |
1489 | gdbarch_register_name (get_regcache_arch (regcache), | |
1490 | regno)); | |
1491 | ||
1492 | if (!n) | |
1493 | { | |
1494 | /* Invalidate the value of regcache that was set in function | |
1495 | "regcache_raw_write". */ | |
1496 | if (regno < 0) | |
1497 | { | |
1498 | int i; | |
1499 | ||
1500 | for (i = 0; | |
1501 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1502 | i++) | |
1503 | regcache_invalidate (regcache, i); | |
1504 | } | |
1505 | else | |
1506 | regcache_invalidate (regcache, regno); | |
1507 | ||
1508 | error (_("Process record canceled the operation.")); | |
1509 | } | |
1510 | ||
1511 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1512 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1513 | } |
1514 | ||
88d1aa9d | 1515 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1516 | } |
6b84065d | 1517 | ops->beneath->to_store_registers (ops->beneath, regcache, regno); |
d02ed0bb MM |
1518 | } |
1519 | ||
88d1aa9d MM |
1520 | /* "to_xfer_partial" method. Behavior is conditional on |
1521 | RECORD_FULL_IS_REPLAY. | |
d02ed0bb MM |
1522 | In replay mode, we cannot write memory unles we are willing to |
1523 | invalidate the record/replay log from this point forward. */ | |
1524 | ||
9b409511 | 1525 | static enum target_xfer_status |
88d1aa9d MM |
1526 | record_full_xfer_partial (struct target_ops *ops, enum target_object object, |
1527 | const char *annex, gdb_byte *readbuf, | |
1528 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1529 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb | 1530 | { |
88d1aa9d | 1531 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1532 | && (object == TARGET_OBJECT_MEMORY |
1533 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1534 | { | |
88d1aa9d | 1535 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1536 | { |
1537 | /* Let user choose if he wants to write memory or not. */ | |
1538 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
1539 | "will make the execution log unusable from this " | |
1540 | "point onward. Write memory at address %s?"), | |
1541 | paddress (target_gdbarch (), offset))) | |
1542 | error (_("Process record canceled the operation.")); | |
1543 | ||
1544 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1545 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1546 | } |
1547 | ||
88d1aa9d MM |
1548 | /* Check record_full_insn_num */ |
1549 | record_full_check_insn_num (0); | |
d02ed0bb MM |
1550 | |
1551 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1552 | record_full_arch_list_head = NULL; |
1553 | record_full_arch_list_tail = NULL; | |
25ea693b | 1554 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1555 | { |
88d1aa9d | 1556 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1557 | if (record_debug) |
1558 | fprintf_unfiltered (gdb_stdlog, | |
1559 | "Process record: failed to record " | |
1560 | "execution log."); | |
2ed4b548 | 1561 | return TARGET_XFER_E_IO; |
d02ed0bb | 1562 | } |
25ea693b | 1563 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1564 | { |
88d1aa9d | 1565 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1566 | if (record_debug) |
1567 | fprintf_unfiltered (gdb_stdlog, | |
1568 | "Process record: failed to record " | |
1569 | "execution log."); | |
2ed4b548 | 1570 | return TARGET_XFER_E_IO; |
d02ed0bb | 1571 | } |
88d1aa9d MM |
1572 | record_full_list->next = record_full_arch_list_head; |
1573 | record_full_arch_list_head->prev = record_full_list; | |
1574 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1575 | |
7ee70bf5 | 1576 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1577 | record_full_list_release_first (); |
d02ed0bb | 1578 | else |
88d1aa9d | 1579 | record_full_insn_num++; |
d02ed0bb MM |
1580 | } |
1581 | ||
6b84065d TT |
1582 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
1583 | readbuf, writebuf, offset, | |
1584 | len, xfered_len); | |
d02ed0bb MM |
1585 | } |
1586 | ||
1587 | /* This structure represents a breakpoint inserted while the record | |
1588 | target is active. We use this to know when to install/remove | |
1589 | breakpoints in/from the target beneath. For example, a breakpoint | |
1590 | may be inserted while recording, but removed when not replaying nor | |
1591 | recording. In that case, the breakpoint had not been inserted on | |
1592 | the target beneath, so we should not try to remove it there. */ | |
1593 | ||
88d1aa9d | 1594 | struct record_full_breakpoint |
d02ed0bb MM |
1595 | { |
1596 | /* The address and address space the breakpoint was set at. */ | |
1597 | struct address_space *address_space; | |
1598 | CORE_ADDR addr; | |
1599 | ||
1600 | /* True when the breakpoint has been also installed in the target | |
1601 | beneath. This will be false for breakpoints set during replay or | |
1602 | when recording. */ | |
1603 | int in_target_beneath; | |
1604 | }; | |
1605 | ||
88d1aa9d MM |
1606 | typedef struct record_full_breakpoint *record_full_breakpoint_p; |
1607 | DEF_VEC_P(record_full_breakpoint_p); | |
d02ed0bb MM |
1608 | |
1609 | /* The list of breakpoints inserted while the record target is | |
1610 | active. */ | |
88d1aa9d | 1611 | VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL; |
d02ed0bb MM |
1612 | |
1613 | static void | |
88d1aa9d | 1614 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1615 | { |
1616 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1617 | return; | |
1618 | ||
1619 | if (loc->inserted) | |
1620 | { | |
88d1aa9d | 1621 | struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1622 | |
1623 | bp->addr = loc->target_info.placed_address; | |
1624 | bp->address_space = loc->target_info.placed_address_space; | |
1625 | ||
1626 | bp->in_target_beneath = 1; | |
1627 | ||
88d1aa9d | 1628 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1629 | } |
1630 | } | |
1631 | ||
88d1aa9d | 1632 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1633 | |
1634 | static void | |
88d1aa9d | 1635 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1636 | { |
88d1aa9d | 1637 | VEC_free (record_full_breakpoint_p, record_full_breakpoints); |
d02ed0bb | 1638 | |
88d1aa9d | 1639 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1640 | } |
1641 | ||
88d1aa9d | 1642 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1643 | insert or remove breakpoints in the real target when replaying, nor |
1644 | when recording. */ | |
1645 | ||
1646 | static int | |
3db08215 MM |
1647 | record_full_insert_breakpoint (struct target_ops *ops, |
1648 | struct gdbarch *gdbarch, | |
88d1aa9d | 1649 | struct bp_target_info *bp_tgt) |
d02ed0bb | 1650 | { |
88d1aa9d | 1651 | struct record_full_breakpoint *bp; |
d02ed0bb MM |
1652 | int in_target_beneath = 0; |
1653 | ||
88d1aa9d | 1654 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1655 | { |
1656 | /* When recording, we currently always single-step, so we don't | |
1657 | really need to install regular breakpoints in the inferior. | |
1658 | However, we do have to insert software single-step | |
1659 | breakpoints, in case the target can't hardware step. To keep | |
1660 | things single, we always insert. */ | |
1661 | struct cleanup *old_cleanups; | |
1662 | int ret; | |
1663 | ||
25ea693b | 1664 | old_cleanups = record_full_gdb_operation_disable_set (); |
6b84065d | 1665 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
d02ed0bb MM |
1666 | do_cleanups (old_cleanups); |
1667 | ||
1668 | if (ret != 0) | |
1669 | return ret; | |
1670 | ||
1671 | in_target_beneath = 1; | |
1672 | } | |
1673 | ||
88d1aa9d | 1674 | bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1675 | bp->addr = bp_tgt->placed_address; |
1676 | bp->address_space = bp_tgt->placed_address_space; | |
1677 | bp->in_target_beneath = in_target_beneath; | |
88d1aa9d | 1678 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1679 | return 0; |
1680 | } | |
1681 | ||
1682 | /* "to_remove_breakpoint" method for process record target. */ | |
1683 | ||
1684 | static int | |
3db08215 MM |
1685 | record_full_remove_breakpoint (struct target_ops *ops, |
1686 | struct gdbarch *gdbarch, | |
88d1aa9d | 1687 | struct bp_target_info *bp_tgt) |
d02ed0bb | 1688 | { |
88d1aa9d | 1689 | struct record_full_breakpoint *bp; |
d02ed0bb MM |
1690 | int ix; |
1691 | ||
1692 | for (ix = 0; | |
88d1aa9d MM |
1693 | VEC_iterate (record_full_breakpoint_p, |
1694 | record_full_breakpoints, ix, bp); | |
d02ed0bb MM |
1695 | ++ix) |
1696 | { | |
1697 | if (bp->addr == bp_tgt->placed_address | |
1698 | && bp->address_space == bp_tgt->placed_address_space) | |
1699 | { | |
1700 | if (bp->in_target_beneath) | |
1701 | { | |
1702 | struct cleanup *old_cleanups; | |
1703 | int ret; | |
1704 | ||
25ea693b | 1705 | old_cleanups = record_full_gdb_operation_disable_set (); |
6b84065d TT |
1706 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, |
1707 | bp_tgt); | |
d02ed0bb MM |
1708 | do_cleanups (old_cleanups); |
1709 | ||
1710 | if (ret != 0) | |
1711 | return ret; | |
1712 | } | |
1713 | ||
88d1aa9d MM |
1714 | VEC_unordered_remove (record_full_breakpoint_p, |
1715 | record_full_breakpoints, ix); | |
d02ed0bb MM |
1716 | return 0; |
1717 | } | |
1718 | } | |
1719 | ||
1720 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1721 | } | |
1722 | ||
1723 | /* "to_can_execute_reverse" method for process record target. */ | |
1724 | ||
1725 | static int | |
19db3e69 | 1726 | record_full_can_execute_reverse (struct target_ops *self) |
d02ed0bb MM |
1727 | { |
1728 | return 1; | |
1729 | } | |
1730 | ||
1731 | /* "to_get_bookmark" method for process record and prec over core. */ | |
1732 | ||
1733 | static gdb_byte * | |
c2bcbb1d TT |
1734 | record_full_get_bookmark (struct target_ops *self, const char *args, |
1735 | int from_tty) | |
d02ed0bb | 1736 | { |
0f928d68 | 1737 | char *ret = NULL; |
d02ed0bb MM |
1738 | |
1739 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1740 | if (record_full_list && record_full_list->type == record_full_end) |
1741 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1742 | |
1743 | if (record_debug) | |
1744 | { | |
1745 | if (ret) | |
1746 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1747 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1748 | else |
1749 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1750 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1751 | } |
0f928d68 | 1752 | return (gdb_byte *) ret; |
d02ed0bb MM |
1753 | } |
1754 | ||
1755 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1756 | ||
1757 | static void | |
3c80fb48 | 1758 | record_full_goto_bookmark (struct target_ops *self, |
c2bcbb1d | 1759 | const gdb_byte *raw_bookmark, int from_tty) |
d02ed0bb | 1760 | { |
c2bcbb1d TT |
1761 | const char *bookmark = (const char *) raw_bookmark; |
1762 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); | |
0f928d68 | 1763 | |
d02ed0bb MM |
1764 | if (record_debug) |
1765 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1766 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb MM |
1767 | |
1768 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1769 | { | |
c2bcbb1d TT |
1770 | char *copy; |
1771 | ||
d02ed0bb MM |
1772 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) |
1773 | error (_("Unbalanced quotes: %s"), bookmark); | |
1774 | ||
c2bcbb1d TT |
1775 | |
1776 | copy = savestring (bookmark + 1, strlen (bookmark) - 2); | |
1777 | make_cleanup (xfree, copy); | |
1778 | bookmark = copy; | |
d02ed0bb MM |
1779 | } |
1780 | ||
c2bcbb1d TT |
1781 | record_goto (bookmark); |
1782 | ||
1783 | do_cleanups (cleanup); | |
d02ed0bb MM |
1784 | } |
1785 | ||
d02ed0bb | 1786 | static enum exec_direction_kind |
4c612759 | 1787 | record_full_execution_direction (struct target_ops *self) |
d02ed0bb | 1788 | { |
88d1aa9d | 1789 | return record_full_execution_dir; |
d02ed0bb MM |
1790 | } |
1791 | ||
1792 | static void | |
630d6a4a | 1793 | record_full_info (struct target_ops *self) |
d02ed0bb | 1794 | { |
88d1aa9d | 1795 | struct record_full_entry *p; |
d02ed0bb | 1796 | |
88d1aa9d | 1797 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1798 | printf_filtered (_("Replay mode:\n")); |
1799 | else | |
1800 | printf_filtered (_("Record mode:\n")); | |
1801 | ||
1802 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1803 | for (p = record_full_first.next; |
1804 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1805 | p = p->next) |
1806 | ; | |
1807 | ||
1808 | /* Do we have a log at all? */ | |
88d1aa9d | 1809 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1810 | { |
1811 | /* Display instruction number for first instruction in the log. */ | |
1812 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1813 | pulongest (p->u.end.insn_num)); | |
1814 | ||
1815 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1816 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1817 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1818 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1819 | |
1820 | /* Display instruction number for last instruction in the log. */ | |
1821 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1822 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1823 | |
1824 | /* Display log count. */ | |
7ee70bf5 | 1825 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1826 | record_full_insn_num); |
d02ed0bb MM |
1827 | } |
1828 | else | |
1829 | printf_filtered (_("No instructions have been logged.\n")); | |
1830 | ||
1831 | /* Display max log size. */ | |
7ee70bf5 | 1832 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1833 | record_full_insn_max_num); |
d02ed0bb MM |
1834 | } |
1835 | ||
1836 | /* The "to_record_delete" target method. */ | |
1837 | ||
1838 | static void | |
d1b55219 | 1839 | record_full_delete (struct target_ops *self) |
d02ed0bb | 1840 | { |
88d1aa9d | 1841 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1842 | } |
1843 | ||
1844 | /* The "to_record_is_replaying" target method. */ | |
1845 | ||
1846 | static int | |
a52eab48 | 1847 | record_full_is_replaying (struct target_ops *self, ptid_t ptid) |
d02ed0bb | 1848 | { |
88d1aa9d | 1849 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1850 | } |
1851 | ||
7ff27e9b MM |
1852 | /* The "to_record_will_replay" target method. */ |
1853 | ||
1854 | static int | |
1855 | record_full_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1856 | { | |
1857 | /* We can currently only record when executing forwards. Should we be able | |
1858 | to record when executing backwards on targets that support reverse | |
1859 | execution, this needs to be changed. */ | |
1860 | ||
1861 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1862 | } | |
1863 | ||
d02ed0bb MM |
1864 | /* Go to a specific entry. */ |
1865 | ||
1866 | static void | |
88d1aa9d | 1867 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1868 | { |
1869 | if (p == NULL) | |
1870 | error (_("Target insn not found.")); | |
88d1aa9d | 1871 | else if (p == record_full_list) |
d02ed0bb | 1872 | error (_("Already at target insn.")); |
88d1aa9d | 1873 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1874 | { |
1875 | printf_filtered (_("Go forward to insn number %s\n"), | |
1876 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1877 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
1878 | } |
1879 | else | |
1880 | { | |
1881 | printf_filtered (_("Go backward to insn number %s\n"), | |
1882 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1883 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
1884 | } |
1885 | ||
1886 | registers_changed (); | |
1887 | reinit_frame_cache (); | |
485668e5 | 1888 | stop_pc = regcache_read_pc (get_current_regcache ()); |
08d72866 | 1889 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
1890 | } |
1891 | ||
1892 | /* The "to_goto_record_begin" target method. */ | |
1893 | ||
1894 | static void | |
08475817 | 1895 | record_full_goto_begin (struct target_ops *self) |
d02ed0bb | 1896 | { |
88d1aa9d | 1897 | struct record_full_entry *p = NULL; |
d02ed0bb | 1898 | |
88d1aa9d MM |
1899 | for (p = &record_full_first; p != NULL; p = p->next) |
1900 | if (p->type == record_full_end) | |
d02ed0bb MM |
1901 | break; |
1902 | ||
88d1aa9d | 1903 | record_full_goto_entry (p); |
d02ed0bb MM |
1904 | } |
1905 | ||
1906 | /* The "to_goto_record_end" target method. */ | |
1907 | ||
1908 | static void | |
307a1b91 | 1909 | record_full_goto_end (struct target_ops *self) |
d02ed0bb | 1910 | { |
88d1aa9d | 1911 | struct record_full_entry *p = NULL; |
d02ed0bb | 1912 | |
88d1aa9d | 1913 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
1914 | ; |
1915 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 1916 | if (p->type == record_full_end) |
d02ed0bb MM |
1917 | break; |
1918 | ||
88d1aa9d | 1919 | record_full_goto_entry (p); |
d02ed0bb MM |
1920 | } |
1921 | ||
1922 | /* The "to_goto_record" target method. */ | |
1923 | ||
1924 | static void | |
606183ac | 1925 | record_full_goto (struct target_ops *self, ULONGEST target_insn) |
d02ed0bb | 1926 | { |
88d1aa9d | 1927 | struct record_full_entry *p = NULL; |
d02ed0bb | 1928 | |
88d1aa9d MM |
1929 | for (p = &record_full_first; p != NULL; p = p->next) |
1930 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
1931 | break; |
1932 | ||
88d1aa9d | 1933 | record_full_goto_entry (p); |
d02ed0bb MM |
1934 | } |
1935 | ||
797094dd MM |
1936 | /* The "to_record_stop_replaying" target method. */ |
1937 | ||
1938 | static void | |
1939 | record_full_stop_replaying (struct target_ops *self) | |
1940 | { | |
1941 | record_full_goto_end (self); | |
1942 | } | |
1943 | ||
d02ed0bb | 1944 | static void |
88d1aa9d | 1945 | init_record_full_ops (void) |
d02ed0bb | 1946 | { |
88d1aa9d MM |
1947 | record_full_ops.to_shortname = "record-full"; |
1948 | record_full_ops.to_longname = "Process record and replay target"; | |
1949 | record_full_ops.to_doc = | |
d02ed0bb | 1950 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
1951 | record_full_ops.to_open = record_full_open; |
1952 | record_full_ops.to_close = record_full_close; | |
b7d2e916 | 1953 | record_full_ops.to_async = record_full_async; |
88d1aa9d MM |
1954 | record_full_ops.to_resume = record_full_resume; |
1955 | record_full_ops.to_wait = record_full_wait; | |
7c1687a9 MM |
1956 | record_full_ops.to_disconnect = record_disconnect; |
1957 | record_full_ops.to_detach = record_detach; | |
1958 | record_full_ops.to_mourn_inferior = record_mourn_inferior; | |
1959 | record_full_ops.to_kill = record_kill; | |
88d1aa9d MM |
1960 | record_full_ops.to_store_registers = record_full_store_registers; |
1961 | record_full_ops.to_xfer_partial = record_full_xfer_partial; | |
1962 | record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint; | |
1963 | record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint; | |
1964 | record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint; | |
1965 | record_full_ops.to_stopped_data_address = record_full_stopped_data_address; | |
9e8915c6 PA |
1966 | record_full_ops.to_stopped_by_sw_breakpoint |
1967 | = record_full_stopped_by_sw_breakpoint; | |
1968 | record_full_ops.to_supports_stopped_by_sw_breakpoint | |
1969 | = record_full_supports_stopped_by_sw_breakpoint; | |
1970 | record_full_ops.to_stopped_by_hw_breakpoint | |
1971 | = record_full_stopped_by_hw_breakpoint; | |
1972 | record_full_ops.to_supports_stopped_by_hw_breakpoint | |
1973 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
1974 | record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse; |
1975 | record_full_ops.to_stratum = record_stratum; | |
d02ed0bb | 1976 | /* Add bookmark target methods. */ |
88d1aa9d MM |
1977 | record_full_ops.to_get_bookmark = record_full_get_bookmark; |
1978 | record_full_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
1979 | record_full_ops.to_execution_direction = record_full_execution_direction; |
1980 | record_full_ops.to_info_record = record_full_info; | |
1981 | record_full_ops.to_save_record = record_full_save; | |
1982 | record_full_ops.to_delete_record = record_full_delete; | |
1983 | record_full_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 1984 | record_full_ops.to_record_will_replay = record_full_will_replay; |
797094dd | 1985 | record_full_ops.to_record_stop_replaying = record_full_stop_replaying; |
88d1aa9d MM |
1986 | record_full_ops.to_goto_record_begin = record_full_goto_begin; |
1987 | record_full_ops.to_goto_record_end = record_full_goto_end; | |
1988 | record_full_ops.to_goto_record = record_full_goto; | |
1989 | record_full_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
1990 | } |
1991 | ||
1992 | /* "to_resume" method for prec over corefile. */ | |
1993 | ||
1994 | static void | |
88d1aa9d MM |
1995 | record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step, |
1996 | enum gdb_signal signal) | |
d02ed0bb | 1997 | { |
88d1aa9d MM |
1998 | record_full_resume_step = step; |
1999 | record_full_resumed = 1; | |
2000 | record_full_execution_dir = execution_direction; | |
d02ed0bb MM |
2001 | |
2002 | /* We are about to start executing the inferior (or simulate it), | |
2003 | let's register it with the event loop. */ | |
2004 | if (target_can_async_p ()) | |
6a3753b3 | 2005 | target_async (1); |
d02ed0bb MM |
2006 | } |
2007 | ||
2008 | /* "to_kill" method for prec over corefile. */ | |
2009 | ||
2010 | static void | |
88d1aa9d | 2011 | record_full_core_kill (struct target_ops *ops) |
d02ed0bb MM |
2012 | { |
2013 | if (record_debug) | |
88d1aa9d | 2014 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2015 | |
88d1aa9d | 2016 | unpush_target (&record_full_core_ops); |
d02ed0bb MM |
2017 | } |
2018 | ||
2019 | /* "to_fetch_registers" method for prec over corefile. */ | |
2020 | ||
2021 | static void | |
88d1aa9d MM |
2022 | record_full_core_fetch_registers (struct target_ops *ops, |
2023 | struct regcache *regcache, | |
2024 | int regno) | |
d02ed0bb MM |
2025 | { |
2026 | if (regno < 0) | |
2027 | { | |
2028 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
2029 | int i; | |
2030 | ||
2031 | for (i = 0; i < num; i ++) | |
2032 | regcache_raw_supply (regcache, i, | |
88d1aa9d | 2033 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb MM |
2034 | } |
2035 | else | |
2036 | regcache_raw_supply (regcache, regno, | |
88d1aa9d | 2037 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2038 | } |
2039 | ||
2040 | /* "to_prepare_to_store" method for prec over corefile. */ | |
2041 | ||
2042 | static void | |
f32dbf8c MM |
2043 | record_full_core_prepare_to_store (struct target_ops *self, |
2044 | struct regcache *regcache) | |
d02ed0bb MM |
2045 | { |
2046 | } | |
2047 | ||
2048 | /* "to_store_registers" method for prec over corefile. */ | |
2049 | ||
2050 | static void | |
88d1aa9d | 2051 | record_full_core_store_registers (struct target_ops *ops, |
d02ed0bb MM |
2052 | struct regcache *regcache, |
2053 | int regno) | |
2054 | { | |
88d1aa9d | 2055 | if (record_full_gdb_operation_disable) |
d02ed0bb | 2056 | regcache_raw_collect (regcache, regno, |
88d1aa9d | 2057 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2058 | else |
2059 | error (_("You can't do that without a process to debug.")); | |
2060 | } | |
2061 | ||
2062 | /* "to_xfer_partial" method for prec over corefile. */ | |
2063 | ||
9b409511 | 2064 | static enum target_xfer_status |
88d1aa9d MM |
2065 | record_full_core_xfer_partial (struct target_ops *ops, |
2066 | enum target_object object, | |
2067 | const char *annex, gdb_byte *readbuf, | |
2068 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 2069 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb MM |
2070 | { |
2071 | if (object == TARGET_OBJECT_MEMORY) | |
2072 | { | |
88d1aa9d | 2073 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb MM |
2074 | { |
2075 | struct target_section *p; | |
2076 | ||
88d1aa9d | 2077 | for (p = record_full_core_start; p < record_full_core_end; p++) |
d02ed0bb MM |
2078 | { |
2079 | if (offset >= p->addr) | |
2080 | { | |
88d1aa9d | 2081 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2082 | ULONGEST sec_offset; |
2083 | ||
2084 | if (offset >= p->endaddr) | |
2085 | continue; | |
2086 | ||
2087 | if (offset + len > p->endaddr) | |
2088 | len = p->endaddr - offset; | |
2089 | ||
2090 | sec_offset = offset - p->addr; | |
2091 | ||
2092 | /* Read readbuf or write writebuf p, offset, len. */ | |
2093 | /* Check flags. */ | |
2094 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2095 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2096 | { | |
2097 | if (readbuf) | |
2098 | memset (readbuf, 0, len); | |
9b409511 YQ |
2099 | |
2100 | *xfered_len = len; | |
2101 | return TARGET_XFER_OK; | |
d02ed0bb | 2102 | } |
88d1aa9d MM |
2103 | /* Get record_full_core_buf_entry. */ |
2104 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb MM |
2105 | entry = entry->prev) |
2106 | if (entry->p == p) | |
2107 | break; | |
2108 | if (writebuf) | |
2109 | { | |
2110 | if (!entry) | |
2111 | { | |
2112 | /* Add a new entry. */ | |
8d749320 | 2113 | entry = XNEW (struct record_full_core_buf_entry); |
d02ed0bb | 2114 | entry->p = p; |
2b2848e2 DE |
2115 | if (!bfd_malloc_and_get_section |
2116 | (p->the_bfd_section->owner, | |
2117 | p->the_bfd_section, | |
2118 | &entry->buf)) | |
d02ed0bb MM |
2119 | { |
2120 | xfree (entry); | |
9b409511 | 2121 | return TARGET_XFER_EOF; |
d02ed0bb | 2122 | } |
88d1aa9d MM |
2123 | entry->prev = record_full_core_buf_list; |
2124 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2125 | } |
2126 | ||
2127 | memcpy (entry->buf + sec_offset, writebuf, | |
2128 | (size_t) len); | |
2129 | } | |
2130 | else | |
2131 | { | |
2132 | if (!entry) | |
6b84065d TT |
2133 | return ops->beneath->to_xfer_partial (ops->beneath, |
2134 | object, annex, | |
2135 | readbuf, writebuf, | |
2136 | offset, len, | |
2137 | xfered_len); | |
d02ed0bb MM |
2138 | |
2139 | memcpy (readbuf, entry->buf + sec_offset, | |
2140 | (size_t) len); | |
2141 | } | |
2142 | ||
9b409511 YQ |
2143 | *xfered_len = len; |
2144 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2145 | } |
2146 | } | |
2147 | ||
2ed4b548 | 2148 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2149 | } |
2150 | else | |
2151 | error (_("You can't do that without a process to debug.")); | |
2152 | } | |
2153 | ||
6b84065d TT |
2154 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2155 | readbuf, writebuf, offset, len, | |
2156 | xfered_len); | |
d02ed0bb MM |
2157 | } |
2158 | ||
2159 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2160 | ||
2161 | static int | |
3db08215 MM |
2162 | record_full_core_insert_breakpoint (struct target_ops *ops, |
2163 | struct gdbarch *gdbarch, | |
88d1aa9d | 2164 | struct bp_target_info *bp_tgt) |
d02ed0bb MM |
2165 | { |
2166 | return 0; | |
2167 | } | |
2168 | ||
2169 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2170 | ||
2171 | static int | |
3db08215 MM |
2172 | record_full_core_remove_breakpoint (struct target_ops *ops, |
2173 | struct gdbarch *gdbarch, | |
88d1aa9d | 2174 | struct bp_target_info *bp_tgt) |
d02ed0bb MM |
2175 | { |
2176 | return 0; | |
2177 | } | |
2178 | ||
2179 | /* "to_has_execution" method for prec over corefile. */ | |
2180 | ||
2181 | static int | |
88d1aa9d | 2182 | record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid) |
d02ed0bb MM |
2183 | { |
2184 | return 1; | |
2185 | } | |
2186 | ||
2187 | static void | |
88d1aa9d | 2188 | init_record_full_core_ops (void) |
d02ed0bb | 2189 | { |
88d1aa9d MM |
2190 | record_full_core_ops.to_shortname = "record-core"; |
2191 | record_full_core_ops.to_longname = "Process record and replay target"; | |
2192 | record_full_core_ops.to_doc = | |
d02ed0bb | 2193 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
2194 | record_full_core_ops.to_open = record_full_open; |
2195 | record_full_core_ops.to_close = record_full_close; | |
b7d2e916 | 2196 | record_full_core_ops.to_async = record_full_async; |
88d1aa9d MM |
2197 | record_full_core_ops.to_resume = record_full_core_resume; |
2198 | record_full_core_ops.to_wait = record_full_wait; | |
2199 | record_full_core_ops.to_kill = record_full_core_kill; | |
2200 | record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers; | |
2201 | record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store; | |
2202 | record_full_core_ops.to_store_registers = record_full_core_store_registers; | |
2203 | record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial; | |
2204 | record_full_core_ops.to_insert_breakpoint | |
2205 | = record_full_core_insert_breakpoint; | |
2206 | record_full_core_ops.to_remove_breakpoint | |
2207 | = record_full_core_remove_breakpoint; | |
2208 | record_full_core_ops.to_stopped_by_watchpoint | |
2209 | = record_full_stopped_by_watchpoint; | |
2210 | record_full_core_ops.to_stopped_data_address | |
2211 | = record_full_stopped_data_address; | |
9e8915c6 PA |
2212 | record_full_core_ops.to_stopped_by_sw_breakpoint |
2213 | = record_full_stopped_by_sw_breakpoint; | |
2214 | record_full_core_ops.to_supports_stopped_by_sw_breakpoint | |
2215 | = record_full_supports_stopped_by_sw_breakpoint; | |
2216 | record_full_core_ops.to_stopped_by_hw_breakpoint | |
2217 | = record_full_stopped_by_hw_breakpoint; | |
2218 | record_full_core_ops.to_supports_stopped_by_hw_breakpoint | |
2219 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
2220 | record_full_core_ops.to_can_execute_reverse |
2221 | = record_full_can_execute_reverse; | |
2222 | record_full_core_ops.to_has_execution = record_full_core_has_execution; | |
2223 | record_full_core_ops.to_stratum = record_stratum; | |
d02ed0bb | 2224 | /* Add bookmark target methods. */ |
88d1aa9d MM |
2225 | record_full_core_ops.to_get_bookmark = record_full_get_bookmark; |
2226 | record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
2227 | record_full_core_ops.to_execution_direction |
2228 | = record_full_execution_direction; | |
2229 | record_full_core_ops.to_info_record = record_full_info; | |
2230 | record_full_core_ops.to_delete_record = record_full_delete; | |
2231 | record_full_core_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 2232 | record_full_core_ops.to_record_will_replay = record_full_will_replay; |
88d1aa9d MM |
2233 | record_full_core_ops.to_goto_record_begin = record_full_goto_begin; |
2234 | record_full_core_ops.to_goto_record_end = record_full_goto_end; | |
2235 | record_full_core_ops.to_goto_record = record_full_goto; | |
2236 | record_full_core_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2237 | } |
2238 | ||
2239 | /* Record log save-file format | |
2240 | Version 1 (never released) | |
2241 | ||
2242 | Header: | |
2243 | 4 bytes: magic number htonl(0x20090829). | |
2244 | NOTE: be sure to change whenever this file format changes! | |
2245 | ||
2246 | Records: | |
88d1aa9d MM |
2247 | record_full_end: |
2248 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2249 | record_full_reg: | |
2250 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2251 | 8 bytes: register id (network byte order). |
2252 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2253 | record_full_mem: |
2254 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2255 | 8 bytes: memory length (network byte order). |
2256 | 8 bytes: memory address (network byte order). | |
2257 | n bytes: memory value (n == memory length). | |
2258 | ||
2259 | Version 2 | |
2260 | 4 bytes: magic number netorder32(0x20091016). | |
2261 | NOTE: be sure to change whenever this file format changes! | |
2262 | ||
2263 | Records: | |
88d1aa9d MM |
2264 | record_full_end: |
2265 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2266 | 4 bytes: signal |
2267 | 4 bytes: instruction count | |
88d1aa9d MM |
2268 | record_full_reg: |
2269 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2270 | 4 bytes: register id (network byte order). |
2271 | n bytes: register value (n == actual register size). | |
2272 | (eg. 4 bytes for x86 general registers). | |
88d1aa9d MM |
2273 | record_full_mem: |
2274 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2275 | 4 bytes: memory length (network byte order). |
2276 | 8 bytes: memory address (network byte order). | |
2277 | n bytes: memory value (n == memory length). | |
2278 | ||
2279 | */ | |
2280 | ||
2281 | /* bfdcore_read -- read bytes from a core file section. */ | |
2282 | ||
2283 | static inline void | |
2284 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2285 | { | |
2286 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2287 | ||
2288 | if (ret) | |
2289 | *offset += len; | |
2290 | else | |
2291 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2292 | len, bfd_get_filename (obfd), | |
2293 | bfd_errmsg (bfd_get_error ())); | |
2294 | } | |
2295 | ||
2296 | static inline uint64_t | |
2297 | netorder64 (uint64_t input) | |
2298 | { | |
2299 | uint64_t ret; | |
2300 | ||
2301 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2302 | BFD_ENDIAN_BIG, input); | |
2303 | return ret; | |
2304 | } | |
2305 | ||
2306 | static inline uint32_t | |
2307 | netorder32 (uint32_t input) | |
2308 | { | |
2309 | uint32_t ret; | |
2310 | ||
2311 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2312 | BFD_ENDIAN_BIG, input); | |
2313 | return ret; | |
2314 | } | |
2315 | ||
2316 | static inline uint16_t | |
2317 | netorder16 (uint16_t input) | |
2318 | { | |
2319 | uint16_t ret; | |
2320 | ||
2321 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2322 | BFD_ENDIAN_BIG, input); | |
2323 | return ret; | |
2324 | } | |
2325 | ||
2326 | /* Restore the execution log from a core_bfd file. */ | |
2327 | static void | |
88d1aa9d | 2328 | record_full_restore (void) |
d02ed0bb MM |
2329 | { |
2330 | uint32_t magic; | |
2331 | struct cleanup *old_cleanups; | |
88d1aa9d | 2332 | struct record_full_entry *rec; |
d02ed0bb MM |
2333 | asection *osec; |
2334 | uint32_t osec_size; | |
2335 | int bfd_offset = 0; | |
2336 | struct regcache *regcache; | |
2337 | ||
2338 | /* We restore the execution log from the open core bfd, | |
2339 | if there is one. */ | |
2340 | if (core_bfd == NULL) | |
2341 | return; | |
2342 | ||
88d1aa9d MM |
2343 | /* "record_full_restore" can only be called when record list is empty. */ |
2344 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2345 | |
2346 | if (record_debug) | |
2347 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2348 | ||
2349 | /* Now need to find our special note section. */ | |
2350 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2351 | if (record_debug) | |
2352 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2353 | osec ? "succeeded" : "failed"); | |
2354 | if (osec == NULL) | |
2355 | return; | |
2356 | osec_size = bfd_section_size (core_bfd, osec); | |
2357 | if (record_debug) | |
2358 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); | |
2359 | ||
2360 | /* Check the magic code. */ | |
2361 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2362 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2363 | error (_("Version mis-match or file format error in core file %s."), |
2364 | bfd_get_filename (core_bfd)); | |
2365 | if (record_debug) | |
2366 | fprintf_unfiltered (gdb_stdlog, | |
2367 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2368 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2369 | phex_nz (netorder32 (magic), 4)); |
2370 | ||
88d1aa9d MM |
2371 | /* Restore the entries in recfd into record_full_arch_list_head and |
2372 | record_full_arch_list_tail. */ | |
2373 | record_full_arch_list_head = NULL; | |
2374 | record_full_arch_list_tail = NULL; | |
2375 | record_full_insn_num = 0; | |
2376 | old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb MM |
2377 | regcache = get_current_regcache (); |
2378 | ||
2379 | while (1) | |
2380 | { | |
2381 | uint8_t rectype; | |
2382 | uint32_t regnum, len, signal, count; | |
2383 | uint64_t addr; | |
2384 | ||
2385 | /* We are finished when offset reaches osec_size. */ | |
2386 | if (bfd_offset >= osec_size) | |
2387 | break; | |
2388 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
2389 | ||
2390 | switch (rectype) | |
2391 | { | |
88d1aa9d | 2392 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2393 | /* Get register number to regnum. */ |
2394 | bfdcore_read (core_bfd, osec, ®num, | |
2395 | sizeof (regnum), &bfd_offset); | |
2396 | regnum = netorder32 (regnum); | |
2397 | ||
88d1aa9d | 2398 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb MM |
2399 | |
2400 | /* Get val. */ | |
88d1aa9d | 2401 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2402 | rec->u.reg.len, &bfd_offset); |
2403 | ||
2404 | if (record_debug) | |
2405 | fprintf_unfiltered (gdb_stdlog, | |
2406 | " Reading register %d (1 " | |
2407 | "plus %lu plus %d bytes)\n", | |
2408 | rec->u.reg.num, | |
2409 | (unsigned long) sizeof (regnum), | |
2410 | rec->u.reg.len); | |
2411 | break; | |
2412 | ||
88d1aa9d | 2413 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2414 | /* Get len. */ |
2415 | bfdcore_read (core_bfd, osec, &len, | |
2416 | sizeof (len), &bfd_offset); | |
2417 | len = netorder32 (len); | |
2418 | ||
2419 | /* Get addr. */ | |
2420 | bfdcore_read (core_bfd, osec, &addr, | |
2421 | sizeof (addr), &bfd_offset); | |
2422 | addr = netorder64 (addr); | |
2423 | ||
88d1aa9d | 2424 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb MM |
2425 | |
2426 | /* Get val. */ | |
88d1aa9d | 2427 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2428 | rec->u.mem.len, &bfd_offset); |
2429 | ||
2430 | if (record_debug) | |
2431 | fprintf_unfiltered (gdb_stdlog, | |
2432 | " Reading memory %s (1 plus " | |
2433 | "%lu plus %lu plus %d bytes)\n", | |
2434 | paddress (get_current_arch (), | |
2435 | rec->u.mem.addr), | |
2436 | (unsigned long) sizeof (addr), | |
2437 | (unsigned long) sizeof (len), | |
2438 | rec->u.mem.len); | |
2439 | break; | |
2440 | ||
88d1aa9d MM |
2441 | case record_full_end: /* end */ |
2442 | rec = record_full_end_alloc (); | |
2443 | record_full_insn_num ++; | |
d02ed0bb MM |
2444 | |
2445 | /* Get signal value. */ | |
2446 | bfdcore_read (core_bfd, osec, &signal, | |
2447 | sizeof (signal), &bfd_offset); | |
2448 | signal = netorder32 (signal); | |
aead7601 | 2449 | rec->u.end.sigval = (enum gdb_signal) signal; |
d02ed0bb MM |
2450 | |
2451 | /* Get insn count. */ | |
2452 | bfdcore_read (core_bfd, osec, &count, | |
2453 | sizeof (count), &bfd_offset); | |
2454 | count = netorder32 (count); | |
2455 | rec->u.end.insn_num = count; | |
88d1aa9d | 2456 | record_full_insn_count = count + 1; |
d02ed0bb MM |
2457 | if (record_debug) |
2458 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2459 | " Reading record_full_end (1 + " |
d02ed0bb MM |
2460 | "%lu + %lu bytes), offset == %s\n", |
2461 | (unsigned long) sizeof (signal), | |
2462 | (unsigned long) sizeof (count), | |
2463 | paddress (get_current_arch (), | |
2464 | bfd_offset)); | |
2465 | break; | |
2466 | ||
2467 | default: | |
2468 | error (_("Bad entry type in core file %s."), | |
2469 | bfd_get_filename (core_bfd)); | |
2470 | break; | |
2471 | } | |
2472 | ||
2473 | /* Add rec to record arch list. */ | |
88d1aa9d | 2474 | record_full_arch_list_add (rec); |
d02ed0bb MM |
2475 | } |
2476 | ||
2477 | discard_cleanups (old_cleanups); | |
2478 | ||
88d1aa9d MM |
2479 | /* Add record_full_arch_list_head to the end of record list. */ |
2480 | record_full_first.next = record_full_arch_list_head; | |
2481 | record_full_arch_list_head->prev = &record_full_first; | |
2482 | record_full_arch_list_tail->next = NULL; | |
2483 | record_full_list = &record_full_first; | |
d02ed0bb | 2484 | |
88d1aa9d MM |
2485 | /* Update record_full_insn_max_num. */ |
2486 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2487 | { |
88d1aa9d | 2488 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2489 | warning (_("Auto increase record/replay buffer limit to %u."), |
88d1aa9d | 2490 | record_full_insn_max_num); |
d02ed0bb MM |
2491 | } |
2492 | ||
2493 | /* Succeeded. */ | |
2494 | printf_filtered (_("Restored records from core file %s.\n"), | |
2495 | bfd_get_filename (core_bfd)); | |
2496 | ||
08d72866 | 2497 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2498 | } |
2499 | ||
2500 | /* bfdcore_write -- write bytes into a core file section. */ | |
2501 | ||
2502 | static inline void | |
2503 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2504 | { | |
2505 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2506 | ||
2507 | if (ret) | |
2508 | *offset += len; | |
2509 | else | |
2510 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2511 | len, bfd_get_filename (obfd), | |
2512 | bfd_errmsg (bfd_get_error ())); | |
2513 | } | |
2514 | ||
2515 | /* Restore the execution log from a file. We use a modified elf | |
2516 | corefile format, with an extra section for our data. */ | |
2517 | ||
2518 | static void | |
88d1aa9d | 2519 | cmd_record_full_restore (char *args, int from_tty) |
d02ed0bb MM |
2520 | { |
2521 | core_file_command (args, from_tty); | |
88d1aa9d | 2522 | record_full_open (args, from_tty); |
d02ed0bb MM |
2523 | } |
2524 | ||
2525 | static void | |
88d1aa9d | 2526 | record_full_save_cleanups (void *data) |
d02ed0bb | 2527 | { |
19ba03f4 | 2528 | bfd *obfd = (bfd *) data; |
d02ed0bb MM |
2529 | char *pathname = xstrdup (bfd_get_filename (obfd)); |
2530 | ||
2531 | gdb_bfd_unref (obfd); | |
2532 | unlink (pathname); | |
2533 | xfree (pathname); | |
2534 | } | |
2535 | ||
2536 | /* Save the execution log to a file. We use a modified elf corefile | |
2537 | format, with an extra section for our data. */ | |
2538 | ||
2539 | static void | |
1390f529 | 2540 | record_full_save (struct target_ops *self, const char *recfilename) |
d02ed0bb | 2541 | { |
88d1aa9d | 2542 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2543 | uint32_t magic; |
2544 | struct regcache *regcache; | |
2545 | struct gdbarch *gdbarch; | |
2546 | struct cleanup *old_cleanups; | |
2547 | struct cleanup *set_cleanups; | |
2548 | bfd *obfd; | |
2549 | int save_size = 0; | |
2550 | asection *osec = NULL; | |
2551 | int bfd_offset = 0; | |
2552 | ||
2553 | /* Open the save file. */ | |
2554 | if (record_debug) | |
2555 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2556 | recfilename); | |
2557 | ||
2558 | /* Open the output file. */ | |
2559 | obfd = create_gcore_bfd (recfilename); | |
88d1aa9d | 2560 | old_cleanups = make_cleanup (record_full_save_cleanups, obfd); |
d02ed0bb | 2561 | |
88d1aa9d MM |
2562 | /* Save the current record entry to "cur_record_full_list". */ |
2563 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2564 | |
2565 | /* Get the values of regcache and gdbarch. */ | |
2566 | regcache = get_current_regcache (); | |
2567 | gdbarch = get_regcache_arch (regcache); | |
2568 | ||
2569 | /* Disable the GDB operation record. */ | |
25ea693b | 2570 | set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
2571 | |
2572 | /* Reverse execute to the begin of record list. */ | |
2573 | while (1) | |
2574 | { | |
2575 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2576 | if (record_full_list == &record_full_first) |
d02ed0bb MM |
2577 | break; |
2578 | ||
88d1aa9d | 2579 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2580 | |
88d1aa9d MM |
2581 | if (record_full_list->prev) |
2582 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2583 | } |
2584 | ||
2585 | /* Compute the size needed for the extra bfd section. */ | |
2586 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2587 | for (record_full_list = record_full_first.next; record_full_list; |
2588 | record_full_list = record_full_list->next) | |
2589 | switch (record_full_list->type) | |
d02ed0bb | 2590 | { |
88d1aa9d | 2591 | case record_full_end: |
d02ed0bb MM |
2592 | save_size += 1 + 4 + 4; |
2593 | break; | |
88d1aa9d MM |
2594 | case record_full_reg: |
2595 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2596 | break; |
88d1aa9d MM |
2597 | case record_full_mem: |
2598 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2599 | break; |
2600 | } | |
2601 | ||
2602 | /* Make the new bfd section. */ | |
2603 | osec = bfd_make_section_anyway_with_flags (obfd, "precord", | |
2604 | SEC_HAS_CONTENTS | |
2605 | | SEC_READONLY); | |
2606 | if (osec == NULL) | |
2607 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2608 | recfilename, | |
2609 | bfd_errmsg (bfd_get_error ())); | |
2610 | bfd_set_section_size (obfd, osec, save_size); | |
2611 | bfd_set_section_vma (obfd, osec, 0); | |
2612 | bfd_set_section_alignment (obfd, osec, 0); | |
2613 | bfd_section_lma (obfd, osec) = 0; | |
2614 | ||
2615 | /* Save corefile state. */ | |
2616 | write_gcore_file (obfd); | |
2617 | ||
2618 | /* Write out the record log. */ | |
2619 | /* Write the magic code. */ | |
88d1aa9d | 2620 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2621 | if (record_debug) |
2622 | fprintf_unfiltered (gdb_stdlog, | |
2623 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2624 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2625 | phex_nz (magic, 4)); |
2626 | bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset); | |
2627 | ||
2628 | /* Save the entries to recfd and forward execute to the end of | |
2629 | record list. */ | |
88d1aa9d | 2630 | record_full_list = &record_full_first; |
d02ed0bb MM |
2631 | while (1) |
2632 | { | |
2633 | /* Save entry. */ | |
88d1aa9d | 2634 | if (record_full_list != &record_full_first) |
d02ed0bb MM |
2635 | { |
2636 | uint8_t type; | |
2637 | uint32_t regnum, len, signal, count; | |
2638 | uint64_t addr; | |
2639 | ||
88d1aa9d | 2640 | type = record_full_list->type; |
d02ed0bb MM |
2641 | bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset); |
2642 | ||
88d1aa9d | 2643 | switch (record_full_list->type) |
d02ed0bb | 2644 | { |
88d1aa9d | 2645 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2646 | if (record_debug) |
2647 | fprintf_unfiltered (gdb_stdlog, | |
2648 | " Writing register %d (1 " | |
2649 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2650 | record_full_list->u.reg.num, |
d02ed0bb | 2651 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2652 | record_full_list->u.reg.len); |
d02ed0bb MM |
2653 | |
2654 | /* Write regnum. */ | |
88d1aa9d | 2655 | regnum = netorder32 (record_full_list->u.reg.num); |
d02ed0bb MM |
2656 | bfdcore_write (obfd, osec, ®num, |
2657 | sizeof (regnum), &bfd_offset); | |
2658 | ||
2659 | /* Write regval. */ | |
88d1aa9d MM |
2660 | bfdcore_write (obfd, osec, |
2661 | record_full_get_loc (record_full_list), | |
2662 | record_full_list->u.reg.len, &bfd_offset); | |
d02ed0bb MM |
2663 | break; |
2664 | ||
88d1aa9d | 2665 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2666 | if (record_debug) |
2667 | fprintf_unfiltered (gdb_stdlog, | |
2668 | " Writing memory %s (1 plus " | |
2669 | "%lu plus %lu plus %d bytes)\n", | |
2670 | paddress (gdbarch, | |
88d1aa9d | 2671 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2672 | (unsigned long) sizeof (addr), |
2673 | (unsigned long) sizeof (len), | |
88d1aa9d | 2674 | record_full_list->u.mem.len); |
d02ed0bb MM |
2675 | |
2676 | /* Write memlen. */ | |
88d1aa9d | 2677 | len = netorder32 (record_full_list->u.mem.len); |
d02ed0bb MM |
2678 | bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset); |
2679 | ||
2680 | /* Write memaddr. */ | |
88d1aa9d | 2681 | addr = netorder64 (record_full_list->u.mem.addr); |
d02ed0bb MM |
2682 | bfdcore_write (obfd, osec, &addr, |
2683 | sizeof (addr), &bfd_offset); | |
2684 | ||
2685 | /* Write memval. */ | |
88d1aa9d MM |
2686 | bfdcore_write (obfd, osec, |
2687 | record_full_get_loc (record_full_list), | |
2688 | record_full_list->u.mem.len, &bfd_offset); | |
d02ed0bb MM |
2689 | break; |
2690 | ||
88d1aa9d | 2691 | case record_full_end: |
d02ed0bb MM |
2692 | if (record_debug) |
2693 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2694 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2695 | "%lu + %lu bytes)\n", |
2696 | (unsigned long) sizeof (signal), | |
2697 | (unsigned long) sizeof (count)); | |
2698 | /* Write signal value. */ | |
88d1aa9d | 2699 | signal = netorder32 (record_full_list->u.end.sigval); |
d02ed0bb MM |
2700 | bfdcore_write (obfd, osec, &signal, |
2701 | sizeof (signal), &bfd_offset); | |
2702 | ||
2703 | /* Write insn count. */ | |
88d1aa9d | 2704 | count = netorder32 (record_full_list->u.end.insn_num); |
d02ed0bb MM |
2705 | bfdcore_write (obfd, osec, &count, |
2706 | sizeof (count), &bfd_offset); | |
2707 | break; | |
2708 | } | |
2709 | } | |
2710 | ||
2711 | /* Execute entry. */ | |
88d1aa9d | 2712 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2713 | |
88d1aa9d MM |
2714 | if (record_full_list->next) |
2715 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
2716 | else |
2717 | break; | |
2718 | } | |
2719 | ||
88d1aa9d | 2720 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2721 | while (1) |
2722 | { | |
2723 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2724 | if (record_full_list == cur_record_full_list) |
d02ed0bb MM |
2725 | break; |
2726 | ||
88d1aa9d | 2727 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2728 | |
88d1aa9d MM |
2729 | if (record_full_list->prev) |
2730 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2731 | } |
2732 | ||
2733 | do_cleanups (set_cleanups); | |
2734 | gdb_bfd_unref (obfd); | |
2735 | discard_cleanups (old_cleanups); | |
2736 | ||
2737 | /* Succeeded. */ | |
2738 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2739 | recfilename); | |
2740 | } | |
2741 | ||
88d1aa9d | 2742 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2743 | depending on DIR) to the given entry, changing the program state |
2744 | correspondingly. */ | |
2745 | ||
2746 | static void | |
88d1aa9d MM |
2747 | record_full_goto_insn (struct record_full_entry *entry, |
2748 | enum exec_direction_kind dir) | |
d02ed0bb | 2749 | { |
25ea693b | 2750 | struct cleanup *set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
2751 | struct regcache *regcache = get_current_regcache (); |
2752 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2753 | ||
2754 | /* Assume everything is valid: we will hit the entry, | |
2755 | and we will not hit the end of the recording. */ | |
2756 | ||
2757 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2758 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2759 | |
2760 | do | |
2761 | { | |
88d1aa9d | 2762 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2763 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2764 | record_full_list = record_full_list->prev; |
d02ed0bb | 2765 | else |
88d1aa9d MM |
2766 | record_full_list = record_full_list->next; |
2767 | } while (record_full_list != entry); | |
d02ed0bb MM |
2768 | do_cleanups (set_cleanups); |
2769 | } | |
2770 | ||
2771 | /* Alias for "target record-full". */ | |
2772 | ||
2773 | static void | |
88d1aa9d | 2774 | cmd_record_full_start (char *args, int from_tty) |
d02ed0bb MM |
2775 | { |
2776 | execute_command ("target record-full", from_tty); | |
2777 | } | |
2778 | ||
2779 | static void | |
88d1aa9d MM |
2780 | set_record_full_insn_max_num (char *args, int from_tty, |
2781 | struct cmd_list_element *c) | |
d02ed0bb | 2782 | { |
7ee70bf5 | 2783 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2784 | { |
88d1aa9d MM |
2785 | /* Count down record_full_insn_num while releasing records from list. */ |
2786 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2787 | { |
88d1aa9d MM |
2788 | record_full_list_release_first (); |
2789 | record_full_insn_num--; | |
d02ed0bb MM |
2790 | } |
2791 | } | |
2792 | } | |
2793 | ||
2794 | /* The "set record full" command. */ | |
2795 | ||
2796 | static void | |
2797 | set_record_full_command (char *args, int from_tty) | |
2798 | { | |
2799 | printf_unfiltered (_("\"set record full\" must be followed " | |
2800 | "by an apporpriate subcommand.\n")); | |
2801 | help_list (set_record_full_cmdlist, "set record full ", all_commands, | |
2802 | gdb_stdout); | |
2803 | } | |
2804 | ||
2805 | /* The "show record full" command. */ | |
2806 | ||
2807 | static void | |
2808 | show_record_full_command (char *args, int from_tty) | |
2809 | { | |
2810 | cmd_show_list (show_record_full_cmdlist, from_tty, ""); | |
2811 | } | |
2812 | ||
2813 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
2814 | extern initialize_file_ftype _initialize_record_full; | |
2815 | ||
2816 | void | |
2817 | _initialize_record_full (void) | |
2818 | { | |
2819 | struct cmd_list_element *c; | |
2820 | ||
88d1aa9d MM |
2821 | /* Init record_full_first. */ |
2822 | record_full_first.prev = NULL; | |
2823 | record_full_first.next = NULL; | |
2824 | record_full_first.type = record_full_end; | |
d02ed0bb | 2825 | |
88d1aa9d MM |
2826 | init_record_full_ops (); |
2827 | add_target (&record_full_ops); | |
2828 | add_deprecated_target_alias (&record_full_ops, "record"); | |
2829 | init_record_full_core_ops (); | |
2830 | add_target (&record_full_core_ops); | |
d02ed0bb | 2831 | |
88d1aa9d | 2832 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb MM |
2833 | _("Start full execution recording."), &record_full_cmdlist, |
2834 | "record full ", 0, &record_cmdlist); | |
2835 | ||
88d1aa9d | 2836 | c = add_cmd ("restore", class_obscure, cmd_record_full_restore, |
d02ed0bb MM |
2837 | _("Restore the execution log from a file.\n\ |
2838 | Argument is filename. File must be created with 'record save'."), | |
2839 | &record_full_cmdlist); | |
2840 | set_cmd_completer (c, filename_completer); | |
2841 | ||
2842 | /* Deprecate the old version without "full" prefix. */ | |
2843 | c = add_alias_cmd ("restore", "full restore", class_obscure, 1, | |
2844 | &record_cmdlist); | |
2845 | set_cmd_completer (c, filename_completer); | |
2846 | deprecate_cmd (c, "record full restore"); | |
2847 | ||
2848 | add_prefix_cmd ("full", class_support, set_record_full_command, | |
2849 | _("Set record options"), &set_record_full_cmdlist, | |
2850 | "set record full ", 0, &set_record_cmdlist); | |
2851 | ||
2852 | add_prefix_cmd ("full", class_support, show_record_full_command, | |
2853 | _("Show record options"), &show_record_full_cmdlist, | |
2854 | "show record full ", 0, &show_record_cmdlist); | |
2855 | ||
2856 | /* Record instructions number limit command. */ | |
2857 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
88d1aa9d | 2858 | &record_full_stop_at_limit, _("\ |
d02ed0bb MM |
2859 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2860 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2861 | _("Default is ON.\n\ | |
2862 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2863 | When OFF, if the record/replay buffer becomes full,\n\ | |
2864 | delete the oldest recorded instruction to make room for each new one."), | |
2865 | NULL, NULL, | |
2866 | &set_record_full_cmdlist, &show_record_full_cmdlist); | |
2867 | ||
2868 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2869 | &set_record_cmdlist); | |
2870 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2871 | ||
2872 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2873 | &show_record_cmdlist); | |
2874 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2875 | ||
88d1aa9d MM |
2876 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
2877 | &record_full_insn_max_num, | |
d02ed0bb MM |
2878 | _("Set record/replay buffer limit."), |
2879 | _("Show record/replay buffer limit."), _("\ | |
2880 | Set the maximum number of instructions to be stored in the\n\ | |
f81d1120 PA |
2881 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2882 | limit. Default is 200000."), | |
88d1aa9d | 2883 | set_record_full_insn_max_num, |
d02ed0bb MM |
2884 | NULL, &set_record_full_cmdlist, |
2885 | &show_record_full_cmdlist); | |
2886 | ||
2887 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2888 | &set_record_cmdlist); | |
2889 | deprecate_cmd (c, "set record full insn-number-max"); | |
2890 | ||
2891 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2892 | &show_record_cmdlist); | |
2893 | deprecate_cmd (c, "show record full insn-number-max"); | |
2894 | ||
88d1aa9d | 2895 | add_setshow_boolean_cmd ("memory-query", no_class, |
25ea693b | 2896 | &record_full_memory_query, _("\ |
d02ed0bb MM |
2897 | Set whether query if PREC cannot record memory change of next instruction."), |
2898 | _("\ | |
2899 | Show whether query if PREC cannot record memory change of next instruction."), | |
2900 | _("\ | |
2901 | Default is OFF.\n\ | |
2902 | When ON, query if PREC cannot record memory change of next instruction."), | |
2903 | NULL, NULL, | |
88d1aa9d MM |
2904 | &set_record_full_cmdlist, |
2905 | &show_record_full_cmdlist); | |
d02ed0bb MM |
2906 | |
2907 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2908 | &set_record_cmdlist); | |
2909 | deprecate_cmd (c, "set record full memory-query"); | |
2910 | ||
2911 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2912 | &show_record_cmdlist); | |
2913 | deprecate_cmd (c, "show record full memory-query"); | |
2914 | } |