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d02ed0bb MM |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2013-2014 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" | |
25 | #include "exceptions.h" | |
26 | #include "completer.h" | |
27 | #include "arch-utils.h" | |
28 | #include "gdbcore.h" | |
29 | #include "exec.h" | |
30 | #include "record.h" | |
31 | #include "record-full.h" | |
32 | #include "elf-bfd.h" | |
33 | #include "gcore.h" | |
34 | #include "event-loop.h" | |
35 | #include "inf-loop.h" | |
36 | #include "gdb_bfd.h" | |
37 | #include "observer.h" | |
45741a9c | 38 | #include "infrun.h" |
d02ed0bb MM |
39 | |
40 | #include <signal.h> | |
41 | ||
42 | /* This module implements "target record-full", also known as "process | |
43 | record and replay". This target sits on top of a "normal" target | |
44 | (a target that "has execution"), and provides a record and replay | |
45 | functionality, including reverse debugging. | |
46 | ||
47 | Target record has two modes: recording, and replaying. | |
48 | ||
49 | In record mode, we intercept the to_resume and to_wait methods. | |
50 | Whenever gdb resumes the target, we run the target in single step | |
51 | mode, and we build up an execution log in which, for each executed | |
52 | instruction, we record all changes in memory and register state. | |
53 | This is invisible to the user, to whom it just looks like an | |
54 | ordinary debugging session (except for performance degredation). | |
55 | ||
56 | In replay mode, instead of actually letting the inferior run as a | |
57 | process, we simulate its execution by playing back the recorded | |
58 | execution log. For each instruction in the log, we simulate the | |
59 | instruction's side effects by duplicating the changes that it would | |
60 | have made on memory and registers. */ | |
61 | ||
88d1aa9d | 62 | #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000 |
d02ed0bb | 63 | |
88d1aa9d MM |
64 | #define RECORD_FULL_IS_REPLAY \ |
65 | (record_full_list->next || execution_direction == EXEC_REVERSE) | |
d02ed0bb | 66 | |
88d1aa9d | 67 | #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016) |
d02ed0bb MM |
68 | |
69 | /* These are the core structs of the process record functionality. | |
70 | ||
88d1aa9d MM |
71 | A record_full_entry is a record of the value change of a register |
72 | ("record_full_reg") or a part of memory ("record_full_mem"). And each | |
73 | instruction must have a struct record_full_entry ("record_full_end") | |
74 | that indicates that this is the last struct record_full_entry of this | |
d02ed0bb MM |
75 | instruction. |
76 | ||
88d1aa9d MM |
77 | Each struct record_full_entry is linked to "record_full_list" by "prev" |
78 | and "next" pointers. */ | |
d02ed0bb | 79 | |
88d1aa9d | 80 | struct record_full_mem_entry |
d02ed0bb MM |
81 | { |
82 | CORE_ADDR addr; | |
83 | int len; | |
84 | /* Set this flag if target memory for this entry | |
85 | can no longer be accessed. */ | |
86 | int mem_entry_not_accessible; | |
87 | union | |
88 | { | |
89 | gdb_byte *ptr; | |
90 | gdb_byte buf[sizeof (gdb_byte *)]; | |
91 | } u; | |
92 | }; | |
93 | ||
88d1aa9d | 94 | struct record_full_reg_entry |
d02ed0bb MM |
95 | { |
96 | unsigned short num; | |
97 | unsigned short len; | |
98 | union | |
99 | { | |
100 | gdb_byte *ptr; | |
101 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
102 | } u; | |
103 | }; | |
104 | ||
88d1aa9d | 105 | struct record_full_end_entry |
d02ed0bb MM |
106 | { |
107 | enum gdb_signal sigval; | |
108 | ULONGEST insn_num; | |
109 | }; | |
110 | ||
88d1aa9d | 111 | enum record_full_type |
d02ed0bb | 112 | { |
88d1aa9d MM |
113 | record_full_end = 0, |
114 | record_full_reg, | |
115 | record_full_mem | |
d02ed0bb MM |
116 | }; |
117 | ||
118 | /* This is the data structure that makes up the execution log. | |
119 | ||
120 | The execution log consists of a single linked list of entries | |
88d1aa9d | 121 | of type "struct record_full_entry". It is doubly linked so that it |
d02ed0bb MM |
122 | can be traversed in either direction. |
123 | ||
124 | The start of the list is anchored by a struct called | |
88d1aa9d MM |
125 | "record_full_first". The pointer "record_full_list" either points |
126 | to the last entry that was added to the list (in record mode), or to | |
127 | the next entry in the list that will be executed (in replay mode). | |
d02ed0bb | 128 | |
88d1aa9d MM |
129 | Each list element (struct record_full_entry), in addition to next |
130 | and prev pointers, consists of a union of three entry types: mem, | |
131 | reg, and end. A field called "type" determines which entry type is | |
d02ed0bb MM |
132 | represented by a given list element. |
133 | ||
134 | Each instruction that is added to the execution log is represented | |
135 | by a variable number of list elements ('entries'). The instruction | |
136 | will have one "reg" entry for each register that is changed by | |
137 | executing the instruction (including the PC in every case). It | |
138 | will also have one "mem" entry for each memory change. Finally, | |
139 | each instruction will have an "end" entry that separates it from | |
140 | the changes associated with the next instruction. */ | |
141 | ||
88d1aa9d | 142 | struct record_full_entry |
d02ed0bb | 143 | { |
88d1aa9d MM |
144 | struct record_full_entry *prev; |
145 | struct record_full_entry *next; | |
146 | enum record_full_type type; | |
d02ed0bb MM |
147 | union |
148 | { | |
149 | /* reg */ | |
88d1aa9d | 150 | struct record_full_reg_entry reg; |
d02ed0bb | 151 | /* mem */ |
88d1aa9d | 152 | struct record_full_mem_entry mem; |
d02ed0bb | 153 | /* end */ |
88d1aa9d | 154 | struct record_full_end_entry end; |
d02ed0bb MM |
155 | } u; |
156 | }; | |
157 | ||
158 | /* If true, query if PREC cannot record memory | |
159 | change of next instruction. */ | |
25ea693b | 160 | int record_full_memory_query = 0; |
d02ed0bb | 161 | |
88d1aa9d | 162 | struct record_full_core_buf_entry |
d02ed0bb | 163 | { |
88d1aa9d | 164 | struct record_full_core_buf_entry *prev; |
d02ed0bb MM |
165 | struct target_section *p; |
166 | bfd_byte *buf; | |
167 | }; | |
168 | ||
169 | /* Record buf with core target. */ | |
88d1aa9d MM |
170 | static gdb_byte *record_full_core_regbuf = NULL; |
171 | static struct target_section *record_full_core_start; | |
172 | static struct target_section *record_full_core_end; | |
173 | static struct record_full_core_buf_entry *record_full_core_buf_list = NULL; | |
d02ed0bb MM |
174 | |
175 | /* The following variables are used for managing the linked list that | |
176 | represents the execution log. | |
177 | ||
88d1aa9d MM |
178 | record_full_first is the anchor that holds down the beginning of |
179 | the list. | |
d02ed0bb | 180 | |
88d1aa9d | 181 | record_full_list serves two functions: |
d02ed0bb MM |
182 | 1) In record mode, it anchors the end of the list. |
183 | 2) In replay mode, it traverses the list and points to | |
184 | the next instruction that must be emulated. | |
185 | ||
88d1aa9d MM |
186 | record_full_arch_list_head and record_full_arch_list_tail are used |
187 | to manage a separate list, which is used to build up the change | |
188 | elements of the currently executing instruction during record mode. | |
189 | When this instruction has been completely annotated in the "arch | |
190 | list", it will be appended to the main execution log. */ | |
d02ed0bb | 191 | |
88d1aa9d MM |
192 | static struct record_full_entry record_full_first; |
193 | static struct record_full_entry *record_full_list = &record_full_first; | |
194 | static struct record_full_entry *record_full_arch_list_head = NULL; | |
195 | static struct record_full_entry *record_full_arch_list_tail = NULL; | |
d02ed0bb | 196 | |
88d1aa9d MM |
197 | /* 1 ask user. 0 auto delete the last struct record_full_entry. */ |
198 | static int record_full_stop_at_limit = 1; | |
d02ed0bb | 199 | /* Maximum allowed number of insns in execution log. */ |
88d1aa9d MM |
200 | static unsigned int record_full_insn_max_num |
201 | = DEFAULT_RECORD_FULL_INSN_MAX_NUM; | |
d02ed0bb | 202 | /* Actual count of insns presently in execution log. */ |
7ee70bf5 | 203 | static unsigned int record_full_insn_num = 0; |
d02ed0bb MM |
204 | /* Count of insns logged so far (may be larger |
205 | than count of insns presently in execution log). */ | |
88d1aa9d | 206 | static ULONGEST record_full_insn_count; |
d02ed0bb MM |
207 | |
208 | /* The target_ops of process record. */ | |
88d1aa9d MM |
209 | static struct target_ops record_full_ops; |
210 | static struct target_ops record_full_core_ops; | |
d02ed0bb | 211 | |
8213266a PA |
212 | /* See record-full.h. */ |
213 | ||
214 | int | |
215 | record_full_is_used (void) | |
216 | { | |
217 | struct target_ops *t; | |
218 | ||
219 | t = find_record_target (); | |
220 | return (t == &record_full_ops | |
221 | || t == &record_full_core_ops); | |
222 | } | |
223 | ||
224 | ||
d02ed0bb MM |
225 | /* Command lists for "set/show record full". */ |
226 | static struct cmd_list_element *set_record_full_cmdlist; | |
227 | static struct cmd_list_element *show_record_full_cmdlist; | |
228 | ||
229 | /* Command list for "record full". */ | |
230 | static struct cmd_list_element *record_full_cmdlist; | |
231 | ||
88d1aa9d MM |
232 | static void record_full_goto_insn (struct record_full_entry *entry, |
233 | enum exec_direction_kind dir); | |
1390f529 TT |
234 | static void record_full_save (struct target_ops *self, |
235 | const char *recfilename); | |
88d1aa9d MM |
236 | |
237 | /* Alloc and free functions for record_full_reg, record_full_mem, and | |
238 | record_full_end entries. */ | |
239 | ||
240 | /* Alloc a record_full_reg record entry. */ | |
241 | ||
242 | static inline struct record_full_entry * | |
243 | record_full_reg_alloc (struct regcache *regcache, int regnum) | |
244 | { | |
245 | struct record_full_entry *rec; | |
d02ed0bb MM |
246 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
247 | ||
88d1aa9d MM |
248 | rec = xcalloc (1, sizeof (struct record_full_entry)); |
249 | rec->type = record_full_reg; | |
d02ed0bb MM |
250 | rec->u.reg.num = regnum; |
251 | rec->u.reg.len = register_size (gdbarch, regnum); | |
252 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
253 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
254 | ||
255 | return rec; | |
256 | } | |
257 | ||
88d1aa9d | 258 | /* Free a record_full_reg record entry. */ |
d02ed0bb MM |
259 | |
260 | static inline void | |
88d1aa9d | 261 | record_full_reg_release (struct record_full_entry *rec) |
d02ed0bb | 262 | { |
88d1aa9d | 263 | gdb_assert (rec->type == record_full_reg); |
d02ed0bb MM |
264 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
265 | xfree (rec->u.reg.u.ptr); | |
266 | xfree (rec); | |
267 | } | |
268 | ||
88d1aa9d | 269 | /* Alloc a record_full_mem record entry. */ |
d02ed0bb | 270 | |
88d1aa9d MM |
271 | static inline struct record_full_entry * |
272 | record_full_mem_alloc (CORE_ADDR addr, int len) | |
d02ed0bb | 273 | { |
88d1aa9d | 274 | struct record_full_entry *rec; |
d02ed0bb | 275 | |
88d1aa9d MM |
276 | rec = xcalloc (1, sizeof (struct record_full_entry)); |
277 | rec->type = record_full_mem; | |
d02ed0bb MM |
278 | rec->u.mem.addr = addr; |
279 | rec->u.mem.len = len; | |
280 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
281 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
282 | ||
283 | return rec; | |
284 | } | |
285 | ||
88d1aa9d | 286 | /* Free a record_full_mem record entry. */ |
d02ed0bb MM |
287 | |
288 | static inline void | |
88d1aa9d | 289 | record_full_mem_release (struct record_full_entry *rec) |
d02ed0bb | 290 | { |
88d1aa9d | 291 | gdb_assert (rec->type == record_full_mem); |
d02ed0bb MM |
292 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
293 | xfree (rec->u.mem.u.ptr); | |
294 | xfree (rec); | |
295 | } | |
296 | ||
88d1aa9d | 297 | /* Alloc a record_full_end record entry. */ |
d02ed0bb | 298 | |
88d1aa9d MM |
299 | static inline struct record_full_entry * |
300 | record_full_end_alloc (void) | |
d02ed0bb | 301 | { |
88d1aa9d | 302 | struct record_full_entry *rec; |
d02ed0bb | 303 | |
88d1aa9d MM |
304 | rec = xcalloc (1, sizeof (struct record_full_entry)); |
305 | rec->type = record_full_end; | |
d02ed0bb MM |
306 | |
307 | return rec; | |
308 | } | |
309 | ||
88d1aa9d | 310 | /* Free a record_full_end record entry. */ |
d02ed0bb MM |
311 | |
312 | static inline void | |
88d1aa9d | 313 | record_full_end_release (struct record_full_entry *rec) |
d02ed0bb MM |
314 | { |
315 | xfree (rec); | |
316 | } | |
317 | ||
318 | /* Free one record entry, any type. | |
319 | Return entry->type, in case caller wants to know. */ | |
320 | ||
88d1aa9d MM |
321 | static inline enum record_full_type |
322 | record_full_entry_release (struct record_full_entry *rec) | |
d02ed0bb | 323 | { |
88d1aa9d | 324 | enum record_full_type type = rec->type; |
d02ed0bb MM |
325 | |
326 | switch (type) { | |
88d1aa9d MM |
327 | case record_full_reg: |
328 | record_full_reg_release (rec); | |
d02ed0bb | 329 | break; |
88d1aa9d MM |
330 | case record_full_mem: |
331 | record_full_mem_release (rec); | |
d02ed0bb | 332 | break; |
88d1aa9d MM |
333 | case record_full_end: |
334 | record_full_end_release (rec); | |
d02ed0bb MM |
335 | break; |
336 | } | |
337 | return type; | |
338 | } | |
339 | ||
340 | /* Free all record entries in list pointed to by REC. */ | |
341 | ||
342 | static void | |
88d1aa9d | 343 | record_full_list_release (struct record_full_entry *rec) |
d02ed0bb MM |
344 | { |
345 | if (!rec) | |
346 | return; | |
347 | ||
348 | while (rec->next) | |
349 | rec = rec->next; | |
350 | ||
351 | while (rec->prev) | |
352 | { | |
353 | rec = rec->prev; | |
88d1aa9d | 354 | record_full_entry_release (rec->next); |
d02ed0bb MM |
355 | } |
356 | ||
88d1aa9d | 357 | if (rec == &record_full_first) |
d02ed0bb | 358 | { |
88d1aa9d MM |
359 | record_full_insn_num = 0; |
360 | record_full_first.next = NULL; | |
d02ed0bb MM |
361 | } |
362 | else | |
88d1aa9d | 363 | record_full_entry_release (rec); |
d02ed0bb MM |
364 | } |
365 | ||
366 | /* Free all record entries forward of the given list position. */ | |
367 | ||
368 | static void | |
88d1aa9d | 369 | record_full_list_release_following (struct record_full_entry *rec) |
d02ed0bb | 370 | { |
88d1aa9d | 371 | struct record_full_entry *tmp = rec->next; |
d02ed0bb MM |
372 | |
373 | rec->next = NULL; | |
374 | while (tmp) | |
375 | { | |
376 | rec = tmp->next; | |
88d1aa9d | 377 | if (record_full_entry_release (tmp) == record_full_end) |
d02ed0bb | 378 | { |
88d1aa9d MM |
379 | record_full_insn_num--; |
380 | record_full_insn_count--; | |
d02ed0bb MM |
381 | } |
382 | tmp = rec; | |
383 | } | |
384 | } | |
385 | ||
386 | /* Delete the first instruction from the beginning of the log, to make | |
387 | room for adding a new instruction at the end of the log. | |
388 | ||
88d1aa9d | 389 | Note -- this function does not modify record_full_insn_num. */ |
d02ed0bb MM |
390 | |
391 | static void | |
88d1aa9d | 392 | record_full_list_release_first (void) |
d02ed0bb | 393 | { |
88d1aa9d | 394 | struct record_full_entry *tmp; |
d02ed0bb | 395 | |
88d1aa9d | 396 | if (!record_full_first.next) |
d02ed0bb MM |
397 | return; |
398 | ||
88d1aa9d | 399 | /* Loop until a record_full_end. */ |
d02ed0bb MM |
400 | while (1) |
401 | { | |
88d1aa9d MM |
402 | /* Cut record_full_first.next out of the linked list. */ |
403 | tmp = record_full_first.next; | |
404 | record_full_first.next = tmp->next; | |
405 | tmp->next->prev = &record_full_first; | |
d02ed0bb MM |
406 | |
407 | /* tmp is now isolated, and can be deleted. */ | |
88d1aa9d MM |
408 | if (record_full_entry_release (tmp) == record_full_end) |
409 | break; /* End loop at first record_full_end. */ | |
d02ed0bb | 410 | |
88d1aa9d | 411 | if (!record_full_first.next) |
d02ed0bb | 412 | { |
88d1aa9d | 413 | gdb_assert (record_full_insn_num == 1); |
d02ed0bb MM |
414 | break; /* End loop when list is empty. */ |
415 | } | |
416 | } | |
417 | } | |
418 | ||
88d1aa9d | 419 | /* Add a struct record_full_entry to record_full_arch_list. */ |
d02ed0bb MM |
420 | |
421 | static void | |
88d1aa9d | 422 | record_full_arch_list_add (struct record_full_entry *rec) |
d02ed0bb MM |
423 | { |
424 | if (record_debug > 1) | |
425 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 426 | "Process record: record_full_arch_list_add %s.\n", |
d02ed0bb MM |
427 | host_address_to_string (rec)); |
428 | ||
88d1aa9d | 429 | if (record_full_arch_list_tail) |
d02ed0bb | 430 | { |
88d1aa9d MM |
431 | record_full_arch_list_tail->next = rec; |
432 | rec->prev = record_full_arch_list_tail; | |
433 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
434 | } |
435 | else | |
436 | { | |
88d1aa9d MM |
437 | record_full_arch_list_head = rec; |
438 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
439 | } |
440 | } | |
441 | ||
442 | /* Return the value storage location of a record entry. */ | |
443 | static inline gdb_byte * | |
88d1aa9d | 444 | record_full_get_loc (struct record_full_entry *rec) |
d02ed0bb MM |
445 | { |
446 | switch (rec->type) { | |
88d1aa9d | 447 | case record_full_mem: |
d02ed0bb MM |
448 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
449 | return rec->u.mem.u.ptr; | |
450 | else | |
451 | return rec->u.mem.u.buf; | |
88d1aa9d | 452 | case record_full_reg: |
d02ed0bb MM |
453 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
454 | return rec->u.reg.u.ptr; | |
455 | else | |
456 | return rec->u.reg.u.buf; | |
88d1aa9d | 457 | case record_full_end: |
d02ed0bb | 458 | default: |
88d1aa9d | 459 | gdb_assert_not_reached ("unexpected record_full_entry type"); |
d02ed0bb MM |
460 | return NULL; |
461 | } | |
462 | } | |
463 | ||
88d1aa9d | 464 | /* Record the value of a register NUM to record_full_arch_list. */ |
d02ed0bb MM |
465 | |
466 | int | |
25ea693b | 467 | record_full_arch_list_add_reg (struct regcache *regcache, int regnum) |
d02ed0bb | 468 | { |
88d1aa9d | 469 | struct record_full_entry *rec; |
d02ed0bb MM |
470 | |
471 | if (record_debug > 1) | |
472 | fprintf_unfiltered (gdb_stdlog, | |
473 | "Process record: add register num = %d to " | |
474 | "record list.\n", | |
475 | regnum); | |
476 | ||
88d1aa9d | 477 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 478 | |
88d1aa9d | 479 | regcache_raw_read (regcache, regnum, record_full_get_loc (rec)); |
d02ed0bb | 480 | |
88d1aa9d | 481 | record_full_arch_list_add (rec); |
d02ed0bb MM |
482 | |
483 | return 0; | |
484 | } | |
485 | ||
486 | /* Record the value of a region of memory whose address is ADDR and | |
88d1aa9d | 487 | length is LEN to record_full_arch_list. */ |
d02ed0bb MM |
488 | |
489 | int | |
25ea693b | 490 | record_full_arch_list_add_mem (CORE_ADDR addr, int len) |
d02ed0bb | 491 | { |
88d1aa9d | 492 | struct record_full_entry *rec; |
d02ed0bb MM |
493 | |
494 | if (record_debug > 1) | |
495 | fprintf_unfiltered (gdb_stdlog, | |
496 | "Process record: add mem addr = %s len = %d to " | |
497 | "record list.\n", | |
498 | paddress (target_gdbarch (), addr), len); | |
499 | ||
500 | if (!addr) /* FIXME: Why? Some arch must permit it... */ | |
501 | return 0; | |
502 | ||
88d1aa9d | 503 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb | 504 | |
88d1aa9d MM |
505 | if (record_read_memory (target_gdbarch (), addr, |
506 | record_full_get_loc (rec), len)) | |
d02ed0bb | 507 | { |
88d1aa9d | 508 | record_full_mem_release (rec); |
d02ed0bb MM |
509 | return -1; |
510 | } | |
511 | ||
88d1aa9d | 512 | record_full_arch_list_add (rec); |
d02ed0bb MM |
513 | |
514 | return 0; | |
515 | } | |
516 | ||
88d1aa9d MM |
517 | /* Add a record_full_end type struct record_full_entry to |
518 | record_full_arch_list. */ | |
d02ed0bb MM |
519 | |
520 | int | |
25ea693b | 521 | record_full_arch_list_add_end (void) |
d02ed0bb | 522 | { |
88d1aa9d | 523 | struct record_full_entry *rec; |
d02ed0bb MM |
524 | |
525 | if (record_debug > 1) | |
526 | fprintf_unfiltered (gdb_stdlog, | |
527 | "Process record: add end to arch list.\n"); | |
528 | ||
88d1aa9d | 529 | rec = record_full_end_alloc (); |
d02ed0bb | 530 | rec->u.end.sigval = GDB_SIGNAL_0; |
88d1aa9d | 531 | rec->u.end.insn_num = ++record_full_insn_count; |
d02ed0bb | 532 | |
88d1aa9d | 533 | record_full_arch_list_add (rec); |
d02ed0bb MM |
534 | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static void | |
88d1aa9d | 539 | record_full_check_insn_num (int set_terminal) |
d02ed0bb | 540 | { |
7ee70bf5 | 541 | if (record_full_insn_num == record_full_insn_max_num) |
d02ed0bb | 542 | { |
7ee70bf5 PA |
543 | /* Ask user what to do. */ |
544 | if (record_full_stop_at_limit) | |
d02ed0bb | 545 | { |
7ee70bf5 PA |
546 | int q; |
547 | ||
548 | if (set_terminal) | |
549 | target_terminal_ours (); | |
550 | q = yquery (_("Do you want to auto delete previous execution " | |
551 | "log entries when record/replay buffer becomes " | |
552 | "full (record full stop-at-limit)?")); | |
553 | if (set_terminal) | |
554 | target_terminal_inferior (); | |
555 | if (q) | |
556 | record_full_stop_at_limit = 0; | |
557 | else | |
558 | error (_("Process record: stopped by user.")); | |
d02ed0bb MM |
559 | } |
560 | } | |
561 | } | |
562 | ||
563 | static void | |
88d1aa9d | 564 | record_full_arch_list_cleanups (void *ignore) |
d02ed0bb | 565 | { |
88d1aa9d | 566 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
567 | } |
568 | ||
569 | /* Before inferior step (when GDB record the running message, inferior | |
570 | only can step), GDB will call this function to record the values to | |
88d1aa9d | 571 | record_full_list. This function will call gdbarch_process_record to |
d02ed0bb | 572 | record the running message of inferior and set them to |
88d1aa9d | 573 | record_full_arch_list, and add it to record_full_list. */ |
d02ed0bb MM |
574 | |
575 | static int | |
88d1aa9d | 576 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
577 | { |
578 | int ret; | |
579 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
88d1aa9d MM |
580 | struct cleanup *old_cleanups |
581 | = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb | 582 | |
88d1aa9d MM |
583 | record_full_arch_list_head = NULL; |
584 | record_full_arch_list_tail = NULL; | |
d02ed0bb | 585 | |
88d1aa9d MM |
586 | /* Check record_full_insn_num. */ |
587 | record_full_check_insn_num (1); | |
d02ed0bb MM |
588 | |
589 | /* If gdb sends a signal value to target_resume, | |
590 | save it in the 'end' field of the previous instruction. | |
591 | ||
592 | Maybe process record should record what really happened, | |
593 | rather than what gdb pretends has happened. | |
594 | ||
595 | So if Linux delivered the signal to the child process during | |
596 | the record mode, we will record it and deliver it again in | |
597 | the replay mode. | |
598 | ||
599 | If user says "ignore this signal" during the record mode, then | |
600 | it will be ignored again during the replay mode (no matter if | |
601 | the user says something different, like "deliver this signal" | |
602 | during the replay mode). | |
603 | ||
604 | User should understand that nothing he does during the replay | |
605 | mode will change the behavior of the child. If he tries, | |
606 | then that is a user error. | |
607 | ||
608 | But we should still deliver the signal to gdb during the replay, | |
609 | if we delivered it during the recording. Therefore we should | |
88d1aa9d MM |
610 | record the signal during record_full_wait, not |
611 | record_full_resume. */ | |
612 | if (record_full_list != &record_full_first) /* FIXME better way to check */ | |
d02ed0bb | 613 | { |
88d1aa9d MM |
614 | gdb_assert (record_full_list->type == record_full_end); |
615 | record_full_list->u.end.sigval = signal; | |
d02ed0bb MM |
616 | } |
617 | ||
618 | if (signal == GDB_SIGNAL_0 | |
619 | || !gdbarch_process_record_signal_p (gdbarch)) | |
620 | ret = gdbarch_process_record (gdbarch, | |
621 | regcache, | |
622 | regcache_read_pc (regcache)); | |
623 | else | |
624 | ret = gdbarch_process_record_signal (gdbarch, | |
625 | regcache, | |
626 | signal); | |
627 | ||
628 | if (ret > 0) | |
629 | error (_("Process record: inferior program stopped.")); | |
630 | if (ret < 0) | |
631 | error (_("Process record: failed to record execution log.")); | |
632 | ||
633 | discard_cleanups (old_cleanups); | |
634 | ||
88d1aa9d MM |
635 | record_full_list->next = record_full_arch_list_head; |
636 | record_full_arch_list_head->prev = record_full_list; | |
637 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 638 | |
7ee70bf5 | 639 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 640 | record_full_list_release_first (); |
d02ed0bb | 641 | else |
88d1aa9d | 642 | record_full_insn_num++; |
d02ed0bb MM |
643 | |
644 | return 1; | |
645 | } | |
646 | ||
88d1aa9d | 647 | struct record_full_message_args { |
d02ed0bb MM |
648 | struct regcache *regcache; |
649 | enum gdb_signal signal; | |
650 | }; | |
651 | ||
652 | static int | |
88d1aa9d | 653 | record_full_message_wrapper (void *args) |
d02ed0bb | 654 | { |
88d1aa9d | 655 | struct record_full_message_args *record_full_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 | ||
88d1aa9d MM |
670 | return catch_errors (record_full_message_wrapper, &args, NULL, |
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. */ | |
88d1aa9d | 692 | static int record_full_hw_watchpoint = 0; |
d02ed0bb MM |
693 | |
694 | /* Execute one instruction from the record log. Each instruction in | |
695 | the log will be represented by an arbitrary sequence of register | |
696 | entries and memory entries, followed by an 'end' entry. */ | |
697 | ||
698 | static inline void | |
88d1aa9d MM |
699 | record_full_exec_insn (struct regcache *regcache, |
700 | struct gdbarch *gdbarch, | |
701 | struct record_full_entry *entry) | |
d02ed0bb MM |
702 | { |
703 | switch (entry->type) | |
704 | { | |
88d1aa9d | 705 | case record_full_reg: /* reg */ |
d02ed0bb MM |
706 | { |
707 | gdb_byte reg[MAX_REGISTER_SIZE]; | |
708 | ||
709 | if (record_debug > 1) | |
710 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 711 | "Process record: record_full_reg %s to " |
d02ed0bb MM |
712 | "inferior num = %d.\n", |
713 | host_address_to_string (entry), | |
714 | entry->u.reg.num); | |
715 | ||
716 | regcache_cooked_read (regcache, entry->u.reg.num, reg); | |
717 | regcache_cooked_write (regcache, entry->u.reg.num, | |
88d1aa9d MM |
718 | record_full_get_loc (entry)); |
719 | memcpy (record_full_get_loc (entry), reg, entry->u.reg.len); | |
d02ed0bb MM |
720 | } |
721 | break; | |
722 | ||
88d1aa9d | 723 | case record_full_mem: /* mem */ |
d02ed0bb MM |
724 | { |
725 | /* Nothing to do if the entry is flagged not_accessible. */ | |
726 | if (!entry->u.mem.mem_entry_not_accessible) | |
727 | { | |
728 | gdb_byte *mem = alloca (entry->u.mem.len); | |
729 | ||
730 | if (record_debug > 1) | |
731 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 732 | "Process record: record_full_mem %s to " |
d02ed0bb MM |
733 | "inferior addr = %s len = %d.\n", |
734 | host_address_to_string (entry), | |
735 | paddress (gdbarch, entry->u.mem.addr), | |
736 | entry->u.mem.len); | |
737 | ||
738 | if (record_read_memory (gdbarch, | |
739 | entry->u.mem.addr, mem, entry->u.mem.len)) | |
740 | entry->u.mem.mem_entry_not_accessible = 1; | |
741 | else | |
742 | { | |
743 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 744 | record_full_get_loc (entry), |
d02ed0bb MM |
745 | entry->u.mem.len)) |
746 | { | |
747 | entry->u.mem.mem_entry_not_accessible = 1; | |
748 | if (record_debug) | |
749 | warning (_("Process record: error writing memory at " | |
750 | "addr = %s len = %d."), | |
751 | paddress (gdbarch, entry->u.mem.addr), | |
752 | entry->u.mem.len); | |
753 | } | |
754 | else | |
755 | { | |
88d1aa9d MM |
756 | memcpy (record_full_get_loc (entry), mem, |
757 | entry->u.mem.len); | |
d02ed0bb MM |
758 | |
759 | /* We've changed memory --- check if a hardware | |
760 | watchpoint should trap. Note that this | |
761 | presently assumes the target beneath supports | |
762 | continuable watchpoints. On non-continuable | |
763 | watchpoints target, we'll want to check this | |
764 | _before_ actually doing the memory change, and | |
765 | not doing the change at all if the watchpoint | |
766 | traps. */ | |
767 | if (hardware_watchpoint_inserted_in_range | |
768 | (get_regcache_aspace (regcache), | |
769 | entry->u.mem.addr, entry->u.mem.len)) | |
88d1aa9d | 770 | record_full_hw_watchpoint = 1; |
d02ed0bb MM |
771 | } |
772 | } | |
773 | } | |
774 | } | |
775 | break; | |
776 | } | |
777 | } | |
778 | ||
88d1aa9d | 779 | static void record_full_restore (void); |
d02ed0bb MM |
780 | |
781 | /* Asynchronous signal handle registered as event loop source for when | |
782 | we have pending events ready to be passed to the core. */ | |
783 | ||
88d1aa9d | 784 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
785 | |
786 | static void | |
88d1aa9d | 787 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb MM |
788 | { |
789 | inferior_event_handler (INF_REG_EVENT, NULL); | |
790 | } | |
791 | ||
792 | /* Open the process record target. */ | |
793 | ||
794 | static void | |
88d1aa9d | 795 | record_full_core_open_1 (char *name, int from_tty) |
d02ed0bb MM |
796 | { |
797 | struct regcache *regcache = get_current_regcache (); | |
798 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
799 | int i; | |
800 | ||
88d1aa9d | 801 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 802 | target_fetch_registers (regcache, -1); |
88d1aa9d | 803 | record_full_core_regbuf = xmalloc (MAX_REGISTER_SIZE * regnum); |
d02ed0bb MM |
804 | for (i = 0; i < regnum; i ++) |
805 | regcache_raw_collect (regcache, i, | |
88d1aa9d | 806 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb | 807 | |
88d1aa9d MM |
808 | /* Get record_full_core_start and record_full_core_end. */ |
809 | if (build_section_table (core_bfd, &record_full_core_start, | |
810 | &record_full_core_end)) | |
d02ed0bb | 811 | { |
88d1aa9d MM |
812 | xfree (record_full_core_regbuf); |
813 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
814 | error (_("\"%s\": Can't find sections: %s"), |
815 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
816 | } | |
817 | ||
88d1aa9d MM |
818 | push_target (&record_full_core_ops); |
819 | record_full_restore (); | |
d02ed0bb MM |
820 | } |
821 | ||
822 | /* "to_open" target method for 'live' processes. */ | |
823 | ||
824 | static void | |
88d1aa9d | 825 | record_full_open_1 (char *name, int from_tty) |
d02ed0bb MM |
826 | { |
827 | if (record_debug) | |
88d1aa9d | 828 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb MM |
829 | |
830 | /* check exec */ | |
831 | if (!target_has_execution) | |
832 | error (_("Process record: the program is not being run.")); | |
833 | if (non_stop) | |
834 | error (_("Process record target can't debug inferior in non-stop mode " | |
835 | "(non-stop).")); | |
836 | ||
837 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
838 | error (_("Process record: the current architecture doesn't support " | |
839 | "record function.")); | |
840 | ||
88d1aa9d | 841 | push_target (&record_full_ops); |
d02ed0bb MM |
842 | } |
843 | ||
88d1aa9d | 844 | static void record_full_init_record_breakpoints (void); |
d02ed0bb MM |
845 | |
846 | /* "to_open" target method. Open the process record target. */ | |
847 | ||
848 | static void | |
88d1aa9d | 849 | record_full_open (char *name, int from_tty) |
d02ed0bb MM |
850 | { |
851 | struct target_ops *t; | |
852 | ||
853 | if (record_debug) | |
88d1aa9d | 854 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 855 | |
8213266a | 856 | record_preopen (); |
d02ed0bb | 857 | |
d02ed0bb | 858 | /* Reset */ |
88d1aa9d MM |
859 | record_full_insn_num = 0; |
860 | record_full_insn_count = 0; | |
861 | record_full_list = &record_full_first; | |
862 | record_full_list->next = NULL; | |
d02ed0bb | 863 | |
d02ed0bb | 864 | if (core_bfd) |
88d1aa9d | 865 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 866 | else |
88d1aa9d | 867 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
868 | |
869 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
870 | record_full_async_inferior_event_token |
871 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
d02ed0bb MM |
872 | NULL); |
873 | ||
88d1aa9d | 874 | record_full_init_record_breakpoints (); |
d02ed0bb MM |
875 | |
876 | observer_notify_record_changed (current_inferior (), 1); | |
877 | } | |
878 | ||
879 | /* "to_close" target method. Close the process record target. */ | |
880 | ||
881 | static void | |
de90e03d | 882 | record_full_close (struct target_ops *self) |
d02ed0bb | 883 | { |
88d1aa9d | 884 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
885 | |
886 | if (record_debug) | |
88d1aa9d | 887 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 888 | |
88d1aa9d | 889 | record_full_list_release (record_full_list); |
d02ed0bb | 890 | |
88d1aa9d MM |
891 | /* Release record_full_core_regbuf. */ |
892 | if (record_full_core_regbuf) | |
d02ed0bb | 893 | { |
88d1aa9d MM |
894 | xfree (record_full_core_regbuf); |
895 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
896 | } |
897 | ||
88d1aa9d MM |
898 | /* Release record_full_core_buf_list. */ |
899 | if (record_full_core_buf_list) | |
d02ed0bb | 900 | { |
88d1aa9d MM |
901 | for (entry = record_full_core_buf_list->prev; entry; |
902 | entry = entry->prev) | |
d02ed0bb | 903 | { |
88d1aa9d MM |
904 | xfree (record_full_core_buf_list); |
905 | record_full_core_buf_list = entry; | |
d02ed0bb | 906 | } |
88d1aa9d | 907 | record_full_core_buf_list = NULL; |
d02ed0bb MM |
908 | } |
909 | ||
88d1aa9d MM |
910 | if (record_full_async_inferior_event_token) |
911 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
912 | } |
913 | ||
88d1aa9d | 914 | static int record_full_resume_step = 0; |
d02ed0bb | 915 | |
88d1aa9d MM |
916 | /* True if we've been resumed, and so each record_full_wait call should |
917 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 918 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 919 | static int record_full_resumed = 0; |
d02ed0bb MM |
920 | |
921 | /* The execution direction of the last resume we got. This is | |
922 | necessary for async mode. Vis (order is not strictly accurate): | |
923 | ||
924 | 1. user has the global execution direction set to forward | |
925 | 2. user does a reverse-step command | |
88d1aa9d | 926 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
927 | temporarily switched to reverse |
928 | 4. GDB's execution direction is reverted back to forward | |
929 | 5. target record notifies event loop there's an event to handle | |
930 | 6. infrun asks the target which direction was it going, and switches | |
931 | the global execution direction accordingly (to reverse) | |
932 | 7. infrun polls an event out of the record target, and handles it | |
933 | 8. GDB goes back to the event loop, and goto #4. | |
934 | */ | |
88d1aa9d | 935 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb MM |
936 | |
937 | /* "to_resume" target method. Resume the process record target. */ | |
938 | ||
939 | static void | |
88d1aa9d MM |
940 | record_full_resume (struct target_ops *ops, ptid_t ptid, int step, |
941 | enum gdb_signal signal) | |
d02ed0bb | 942 | { |
88d1aa9d MM |
943 | record_full_resume_step = step; |
944 | record_full_resumed = 1; | |
945 | record_full_execution_dir = execution_direction; | |
d02ed0bb | 946 | |
88d1aa9d | 947 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
948 | { |
949 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
950 | ||
88d1aa9d | 951 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
952 | |
953 | if (!step) | |
954 | { | |
955 | /* This is not hard single step. */ | |
956 | if (!gdbarch_software_single_step_p (gdbarch)) | |
957 | { | |
958 | /* This is a normal continue. */ | |
959 | step = 1; | |
960 | } | |
961 | else | |
962 | { | |
963 | /* This arch support soft sigle step. */ | |
964 | if (single_step_breakpoints_inserted ()) | |
965 | { | |
966 | /* This is a soft single step. */ | |
88d1aa9d | 967 | record_full_resume_step = 1; |
d02ed0bb MM |
968 | } |
969 | else | |
970 | { | |
971 | /* This is a continue. | |
972 | Try to insert a soft single step breakpoint. */ | |
973 | if (!gdbarch_software_single_step (gdbarch, | |
974 | get_current_frame ())) | |
975 | { | |
976 | /* This system don't want use soft single step. | |
977 | Use hard sigle step. */ | |
978 | step = 1; | |
979 | } | |
980 | } | |
981 | } | |
982 | } | |
983 | ||
984 | /* Make sure the target beneath reports all signals. */ | |
985 | target_pass_signals (0, NULL); | |
986 | ||
6b84065d | 987 | ops->beneath->to_resume (ops->beneath, ptid, step, signal); |
d02ed0bb MM |
988 | } |
989 | ||
990 | /* We are about to start executing the inferior (or simulate it), | |
991 | let's register it with the event loop. */ | |
992 | if (target_can_async_p ()) | |
993 | { | |
994 | target_async (inferior_event_handler, 0); | |
995 | /* Notify the event loop there's an event to wait for. We do | |
88d1aa9d MM |
996 | most of the work in record_full_wait. */ |
997 | mark_async_event_handler (record_full_async_inferior_event_token); | |
d02ed0bb MM |
998 | } |
999 | } | |
1000 | ||
88d1aa9d | 1001 | static int record_full_get_sig = 0; |
d02ed0bb MM |
1002 | |
1003 | /* SIGINT signal handler, registered by "to_wait" method. */ | |
1004 | ||
1005 | static void | |
88d1aa9d | 1006 | record_full_sig_handler (int signo) |
d02ed0bb MM |
1007 | { |
1008 | if (record_debug) | |
1009 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1010 | ||
1011 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 1012 | record_full_resume_step = 1; |
d02ed0bb | 1013 | |
88d1aa9d | 1014 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1015 | SIGINT. */ |
88d1aa9d | 1016 | record_full_get_sig = 1; |
d02ed0bb MM |
1017 | } |
1018 | ||
1019 | static void | |
88d1aa9d | 1020 | record_full_wait_cleanups (void *ignore) |
d02ed0bb MM |
1021 | { |
1022 | if (execution_direction == EXEC_REVERSE) | |
1023 | { | |
88d1aa9d MM |
1024 | if (record_full_list->next) |
1025 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1026 | } |
1027 | else | |
88d1aa9d | 1028 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
1029 | } |
1030 | ||
1031 | /* "to_wait" target method for process record target. | |
1032 | ||
1033 | In record mode, the target is always run in singlestep mode | |
1034 | (even when gdb says to continue). The to_wait method intercepts | |
1035 | the stop events and determines which ones are to be passed on to | |
1036 | gdb. Most stop events are just singlestep events that gdb is not | |
1037 | to know about, so the to_wait method just records them and keeps | |
1038 | singlestepping. | |
1039 | ||
1040 | In replay mode, this function emulates the recorded execution log, | |
1041 | one instruction at a time (forward or backward), and determines | |
1042 | where to stop. */ | |
1043 | ||
1044 | static ptid_t | |
88d1aa9d MM |
1045 | record_full_wait_1 (struct target_ops *ops, |
1046 | ptid_t ptid, struct target_waitstatus *status, | |
1047 | int options) | |
d02ed0bb | 1048 | { |
25ea693b | 1049 | struct cleanup *set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
1050 | |
1051 | if (record_debug) | |
1052 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1053 | "Process record: record_full_wait " |
1054 | "record_full_resume_step = %d, " | |
1055 | "record_full_resumed = %d, direction=%s\n", | |
1056 | record_full_resume_step, record_full_resumed, | |
1057 | record_full_execution_dir == EXEC_FORWARD | |
1058 | ? "forward" : "reverse"); | |
1059 | ||
1060 | if (!record_full_resumed) | |
d02ed0bb MM |
1061 | { |
1062 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1063 | ||
1064 | /* No interesting event. */ | |
1065 | status->kind = TARGET_WAITKIND_IGNORE; | |
1066 | return minus_one_ptid; | |
1067 | } | |
1068 | ||
88d1aa9d MM |
1069 | record_full_get_sig = 0; |
1070 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1071 | |
88d1aa9d | 1072 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1073 | { |
88d1aa9d | 1074 | if (record_full_resume_step) |
d02ed0bb MM |
1075 | { |
1076 | /* This is a single step. */ | |
6b84065d | 1077 | return ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1078 | } |
1079 | else | |
1080 | { | |
1081 | /* This is not a single step. */ | |
1082 | ptid_t ret; | |
1083 | CORE_ADDR tmp_pc; | |
1084 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); | |
1085 | ||
1086 | while (1) | |
1087 | { | |
6b84065d | 1088 | ret = ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1089 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1090 | { | |
1091 | if (record_debug) | |
1092 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1093 | "Process record: record_full_wait " |
d02ed0bb MM |
1094 | "target beneath not done yet\n"); |
1095 | return ret; | |
1096 | } | |
1097 | ||
1098 | if (single_step_breakpoints_inserted ()) | |
1099 | remove_single_step_breakpoints (); | |
1100 | ||
88d1aa9d | 1101 | if (record_full_resume_step) |
d02ed0bb MM |
1102 | return ret; |
1103 | ||
1104 | /* Is this a SIGTRAP? */ | |
1105 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1106 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1107 | { | |
1108 | struct regcache *regcache; | |
1109 | struct address_space *aspace; | |
1110 | ||
1111 | /* Yes -- this is likely our single-step finishing, | |
1112 | but check if there's any reason the core would be | |
1113 | interested in the event. */ | |
1114 | ||
1115 | registers_changed (); | |
1116 | regcache = get_current_regcache (); | |
1117 | tmp_pc = regcache_read_pc (regcache); | |
1118 | aspace = get_regcache_aspace (regcache); | |
1119 | ||
1120 | if (target_stopped_by_watchpoint ()) | |
1121 | { | |
1122 | /* Always interested in watchpoints. */ | |
1123 | } | |
1124 | else if (breakpoint_inserted_here_p (aspace, tmp_pc)) | |
1125 | { | |
1126 | /* There is a breakpoint here. Let the core | |
1127 | handle it. */ | |
1128 | if (software_breakpoint_inserted_here_p (aspace, tmp_pc)) | |
1129 | { | |
1130 | struct gdbarch *gdbarch | |
1131 | = get_regcache_arch (regcache); | |
1132 | CORE_ADDR decr_pc_after_break | |
118e6252 | 1133 | = target_decr_pc_after_break (gdbarch); |
d02ed0bb MM |
1134 | if (decr_pc_after_break) |
1135 | regcache_write_pc (regcache, | |
1136 | tmp_pc + decr_pc_after_break); | |
1137 | } | |
1138 | } | |
1139 | else | |
1140 | { | |
1141 | /* This is a single-step trap. Record the | |
1142 | insn and issue another step. | |
1143 | FIXME: this part can be a random SIGTRAP too. | |
1144 | But GDB cannot handle it. */ | |
1145 | int step = 1; | |
1146 | ||
88d1aa9d MM |
1147 | if (!record_full_message_wrapper_safe (regcache, |
1148 | GDB_SIGNAL_0)) | |
d02ed0bb MM |
1149 | { |
1150 | status->kind = TARGET_WAITKIND_STOPPED; | |
1151 | status->value.sig = GDB_SIGNAL_0; | |
1152 | break; | |
1153 | } | |
1154 | ||
1155 | if (gdbarch_software_single_step_p (gdbarch)) | |
1156 | { | |
1157 | /* Try to insert the software single step breakpoint. | |
1158 | If insert success, set step to 0. */ | |
1159 | set_executing (inferior_ptid, 0); | |
1160 | reinit_frame_cache (); | |
1161 | if (gdbarch_software_single_step (gdbarch, | |
1162 | get_current_frame ())) | |
1163 | step = 0; | |
1164 | set_executing (inferior_ptid, 1); | |
1165 | } | |
1166 | ||
1167 | if (record_debug) | |
1168 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1169 | "Process record: record_full_wait " |
1170 | "issuing one more step in the " | |
1171 | "target beneath\n"); | |
6b84065d TT |
1172 | ops->beneath->to_resume (ops->beneath, ptid, step, |
1173 | GDB_SIGNAL_0); | |
d02ed0bb MM |
1174 | continue; |
1175 | } | |
1176 | } | |
1177 | ||
1178 | /* The inferior is broken by a breakpoint or a signal. */ | |
1179 | break; | |
1180 | } | |
1181 | ||
1182 | return ret; | |
1183 | } | |
1184 | } | |
1185 | else | |
1186 | { | |
1187 | struct regcache *regcache = get_current_regcache (); | |
1188 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1189 | struct address_space *aspace = get_regcache_aspace (regcache); | |
1190 | int continue_flag = 1; | |
88d1aa9d MM |
1191 | int first_record_full_end = 1; |
1192 | struct cleanup *old_cleanups | |
1193 | = make_cleanup (record_full_wait_cleanups, 0); | |
d02ed0bb MM |
1194 | CORE_ADDR tmp_pc; |
1195 | ||
88d1aa9d | 1196 | record_full_hw_watchpoint = 0; |
d02ed0bb MM |
1197 | status->kind = TARGET_WAITKIND_STOPPED; |
1198 | ||
1199 | /* Check breakpoint when forward execute. */ | |
1200 | if (execution_direction == EXEC_FORWARD) | |
1201 | { | |
1202 | tmp_pc = regcache_read_pc (regcache); | |
1203 | if (breakpoint_inserted_here_p (aspace, tmp_pc)) | |
1204 | { | |
118e6252 | 1205 | int decr_pc_after_break = target_decr_pc_after_break (gdbarch); |
d02ed0bb MM |
1206 | |
1207 | if (record_debug) | |
1208 | fprintf_unfiltered (gdb_stdlog, | |
1209 | "Process record: break at %s.\n", | |
1210 | paddress (gdbarch, tmp_pc)); | |
1211 | ||
1212 | if (decr_pc_after_break | |
88d1aa9d | 1213 | && !record_full_resume_step |
d02ed0bb MM |
1214 | && software_breakpoint_inserted_here_p (aspace, tmp_pc)) |
1215 | regcache_write_pc (regcache, | |
1216 | tmp_pc + decr_pc_after_break); | |
1217 | goto replay_out; | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
1222 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1223 | mode, because inferior will not executed. | |
1224 | Then set it to terminal_ours to make GDB get the signal. */ | |
1225 | target_terminal_ours (); | |
1226 | ||
88d1aa9d | 1227 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev |
d02ed0bb | 1228 | instruction. */ |
88d1aa9d MM |
1229 | if (execution_direction == EXEC_FORWARD && record_full_list->next) |
1230 | record_full_list = record_full_list->next; | |
d02ed0bb | 1231 | |
88d1aa9d | 1232 | /* Loop over the record_full_list, looking for the next place to |
d02ed0bb MM |
1233 | stop. */ |
1234 | do | |
1235 | { | |
1236 | /* Check for beginning and end of log. */ | |
1237 | if (execution_direction == EXEC_REVERSE | |
88d1aa9d | 1238 | && record_full_list == &record_full_first) |
d02ed0bb MM |
1239 | { |
1240 | /* Hit beginning of record log in reverse. */ | |
1241 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1242 | break; | |
1243 | } | |
88d1aa9d | 1244 | if (execution_direction != EXEC_REVERSE && !record_full_list->next) |
d02ed0bb MM |
1245 | { |
1246 | /* Hit end of record log going forward. */ | |
1247 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1248 | break; | |
1249 | } | |
1250 | ||
88d1aa9d | 1251 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 1252 | |
88d1aa9d | 1253 | if (record_full_list->type == record_full_end) |
d02ed0bb MM |
1254 | { |
1255 | if (record_debug > 1) | |
1256 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1257 | "Process record: record_full_end %s to " |
d02ed0bb | 1258 | "inferior.\n", |
88d1aa9d | 1259 | host_address_to_string (record_full_list)); |
d02ed0bb | 1260 | |
88d1aa9d | 1261 | if (first_record_full_end && execution_direction == EXEC_REVERSE) |
d02ed0bb | 1262 | { |
88d1aa9d MM |
1263 | /* When reverse excute, the first record_full_end is the |
1264 | part of current instruction. */ | |
1265 | first_record_full_end = 0; | |
d02ed0bb MM |
1266 | } |
1267 | else | |
1268 | { | |
88d1aa9d | 1269 | /* In EXEC_REVERSE mode, this is the record_full_end of prev |
d02ed0bb | 1270 | instruction. |
88d1aa9d MM |
1271 | In EXEC_FORWARD mode, this is the record_full_end of |
1272 | current instruction. */ | |
d02ed0bb | 1273 | /* step */ |
88d1aa9d | 1274 | if (record_full_resume_step) |
d02ed0bb MM |
1275 | { |
1276 | if (record_debug > 1) | |
1277 | fprintf_unfiltered (gdb_stdlog, | |
1278 | "Process record: step.\n"); | |
1279 | continue_flag = 0; | |
1280 | } | |
1281 | ||
1282 | /* check breakpoint */ | |
1283 | tmp_pc = regcache_read_pc (regcache); | |
1284 | if (breakpoint_inserted_here_p (aspace, tmp_pc)) | |
1285 | { | |
1286 | int decr_pc_after_break | |
118e6252 | 1287 | = target_decr_pc_after_break (gdbarch); |
d02ed0bb MM |
1288 | |
1289 | if (record_debug) | |
1290 | fprintf_unfiltered (gdb_stdlog, | |
1291 | "Process record: break " | |
1292 | "at %s.\n", | |
1293 | paddress (gdbarch, tmp_pc)); | |
1294 | if (decr_pc_after_break | |
1295 | && execution_direction == EXEC_FORWARD | |
88d1aa9d | 1296 | && !record_full_resume_step |
d02ed0bb MM |
1297 | && software_breakpoint_inserted_here_p (aspace, |
1298 | tmp_pc)) | |
1299 | regcache_write_pc (regcache, | |
1300 | tmp_pc + decr_pc_after_break); | |
1301 | continue_flag = 0; | |
1302 | } | |
1303 | ||
88d1aa9d | 1304 | if (record_full_hw_watchpoint) |
d02ed0bb MM |
1305 | { |
1306 | if (record_debug) | |
1307 | fprintf_unfiltered (gdb_stdlog, | |
1308 | "Process record: hit hw " | |
1309 | "watchpoint.\n"); | |
1310 | continue_flag = 0; | |
1311 | } | |
1312 | /* Check target signal */ | |
88d1aa9d | 1313 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb MM |
1314 | /* FIXME: better way to check */ |
1315 | continue_flag = 0; | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | if (continue_flag) | |
1320 | { | |
1321 | if (execution_direction == EXEC_REVERSE) | |
1322 | { | |
88d1aa9d MM |
1323 | if (record_full_list->prev) |
1324 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
1325 | } |
1326 | else | |
1327 | { | |
88d1aa9d MM |
1328 | if (record_full_list->next) |
1329 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1330 | } |
1331 | } | |
1332 | } | |
1333 | while (continue_flag); | |
1334 | ||
1335 | replay_out: | |
88d1aa9d | 1336 | if (record_full_get_sig) |
d02ed0bb | 1337 | status->value.sig = GDB_SIGNAL_INT; |
88d1aa9d | 1338 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb | 1339 | /* FIXME: better way to check */ |
88d1aa9d | 1340 | status->value.sig = record_full_list->u.end.sigval; |
d02ed0bb MM |
1341 | else |
1342 | status->value.sig = GDB_SIGNAL_TRAP; | |
1343 | ||
1344 | discard_cleanups (old_cleanups); | |
1345 | } | |
1346 | ||
1347 | signal (SIGINT, handle_sigint); | |
1348 | ||
1349 | do_cleanups (set_cleanups); | |
1350 | return inferior_ptid; | |
1351 | } | |
1352 | ||
1353 | static ptid_t | |
88d1aa9d MM |
1354 | record_full_wait (struct target_ops *ops, |
1355 | ptid_t ptid, struct target_waitstatus *status, | |
1356 | int options) | |
d02ed0bb MM |
1357 | { |
1358 | ptid_t return_ptid; | |
1359 | ||
88d1aa9d | 1360 | return_ptid = record_full_wait_1 (ops, ptid, status, options); |
d02ed0bb MM |
1361 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1362 | { | |
1363 | /* We're reporting a stop. Make sure any spurious | |
1364 | target_wait(WNOHANG) doesn't advance the target until the | |
1365 | core wants us resumed again. */ | |
88d1aa9d | 1366 | record_full_resumed = 0; |
d02ed0bb MM |
1367 | } |
1368 | return return_ptid; | |
1369 | } | |
1370 | ||
1371 | static int | |
6a109b6b | 1372 | record_full_stopped_by_watchpoint (struct target_ops *ops) |
d02ed0bb | 1373 | { |
88d1aa9d MM |
1374 | if (RECORD_FULL_IS_REPLAY) |
1375 | return record_full_hw_watchpoint; | |
d02ed0bb | 1376 | else |
6b84065d | 1377 | return ops->beneath->to_stopped_by_watchpoint (ops->beneath); |
d02ed0bb MM |
1378 | } |
1379 | ||
d02ed0bb | 1380 | static int |
88d1aa9d | 1381 | record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) |
d02ed0bb | 1382 | { |
88d1aa9d | 1383 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1384 | return 0; |
1385 | else | |
6b84065d | 1386 | return ops->beneath->to_stopped_data_address (ops->beneath, addr_p); |
d02ed0bb MM |
1387 | } |
1388 | ||
1389 | /* Record registers change (by user or by GDB) to list as an instruction. */ | |
1390 | ||
1391 | static void | |
88d1aa9d | 1392 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1393 | { |
88d1aa9d MM |
1394 | /* Check record_full_insn_num. */ |
1395 | record_full_check_insn_num (0); | |
d02ed0bb | 1396 | |
88d1aa9d MM |
1397 | record_full_arch_list_head = NULL; |
1398 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1399 | |
1400 | if (regnum < 0) | |
1401 | { | |
1402 | int i; | |
1403 | ||
1404 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
1405 | { | |
25ea693b | 1406 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1407 | { |
88d1aa9d | 1408 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1409 | error (_("Process record: failed to record execution log.")); |
1410 | } | |
1411 | } | |
1412 | } | |
1413 | else | |
1414 | { | |
25ea693b | 1415 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1416 | { |
88d1aa9d | 1417 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1418 | error (_("Process record: failed to record execution log.")); |
1419 | } | |
1420 | } | |
25ea693b | 1421 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1422 | { |
88d1aa9d | 1423 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1424 | error (_("Process record: failed to record execution log.")); |
1425 | } | |
88d1aa9d MM |
1426 | record_full_list->next = record_full_arch_list_head; |
1427 | record_full_arch_list_head->prev = record_full_list; | |
1428 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1429 | |
7ee70bf5 | 1430 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1431 | record_full_list_release_first (); |
d02ed0bb | 1432 | else |
88d1aa9d | 1433 | record_full_insn_num++; |
d02ed0bb MM |
1434 | } |
1435 | ||
1436 | /* "to_store_registers" method for process record target. */ | |
1437 | ||
1438 | static void | |
88d1aa9d MM |
1439 | record_full_store_registers (struct target_ops *ops, |
1440 | struct regcache *regcache, | |
1441 | int regno) | |
d02ed0bb | 1442 | { |
88d1aa9d | 1443 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1444 | { |
88d1aa9d | 1445 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1446 | { |
1447 | int n; | |
1448 | ||
1449 | /* Let user choose if he wants to write register or not. */ | |
1450 | if (regno < 0) | |
1451 | n = | |
1452 | query (_("Because GDB is in replay mode, changing the " | |
1453 | "value of a register will make the execution " | |
1454 | "log unusable from this point onward. " | |
1455 | "Change all registers?")); | |
1456 | else | |
1457 | n = | |
1458 | query (_("Because GDB is in replay mode, changing the value " | |
1459 | "of a register will make the execution log unusable " | |
1460 | "from this point onward. Change register %s?"), | |
1461 | gdbarch_register_name (get_regcache_arch (regcache), | |
1462 | regno)); | |
1463 | ||
1464 | if (!n) | |
1465 | { | |
1466 | /* Invalidate the value of regcache that was set in function | |
1467 | "regcache_raw_write". */ | |
1468 | if (regno < 0) | |
1469 | { | |
1470 | int i; | |
1471 | ||
1472 | for (i = 0; | |
1473 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1474 | i++) | |
1475 | regcache_invalidate (regcache, i); | |
1476 | } | |
1477 | else | |
1478 | regcache_invalidate (regcache, regno); | |
1479 | ||
1480 | error (_("Process record canceled the operation.")); | |
1481 | } | |
1482 | ||
1483 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1484 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1485 | } |
1486 | ||
88d1aa9d | 1487 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1488 | } |
6b84065d | 1489 | ops->beneath->to_store_registers (ops->beneath, regcache, regno); |
d02ed0bb MM |
1490 | } |
1491 | ||
88d1aa9d MM |
1492 | /* "to_xfer_partial" method. Behavior is conditional on |
1493 | RECORD_FULL_IS_REPLAY. | |
d02ed0bb MM |
1494 | In replay mode, we cannot write memory unles we are willing to |
1495 | invalidate the record/replay log from this point forward. */ | |
1496 | ||
9b409511 | 1497 | static enum target_xfer_status |
88d1aa9d MM |
1498 | record_full_xfer_partial (struct target_ops *ops, enum target_object object, |
1499 | const char *annex, gdb_byte *readbuf, | |
1500 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1501 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb | 1502 | { |
88d1aa9d | 1503 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1504 | && (object == TARGET_OBJECT_MEMORY |
1505 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1506 | { | |
88d1aa9d | 1507 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1508 | { |
1509 | /* Let user choose if he wants to write memory or not. */ | |
1510 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
1511 | "will make the execution log unusable from this " | |
1512 | "point onward. Write memory at address %s?"), | |
1513 | paddress (target_gdbarch (), offset))) | |
1514 | error (_("Process record canceled the operation.")); | |
1515 | ||
1516 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1517 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1518 | } |
1519 | ||
88d1aa9d MM |
1520 | /* Check record_full_insn_num */ |
1521 | record_full_check_insn_num (0); | |
d02ed0bb MM |
1522 | |
1523 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1524 | record_full_arch_list_head = NULL; |
1525 | record_full_arch_list_tail = NULL; | |
25ea693b | 1526 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1527 | { |
88d1aa9d | 1528 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1529 | if (record_debug) |
1530 | fprintf_unfiltered (gdb_stdlog, | |
1531 | "Process record: failed to record " | |
1532 | "execution log."); | |
2ed4b548 | 1533 | return TARGET_XFER_E_IO; |
d02ed0bb | 1534 | } |
25ea693b | 1535 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1536 | { |
88d1aa9d | 1537 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1538 | if (record_debug) |
1539 | fprintf_unfiltered (gdb_stdlog, | |
1540 | "Process record: failed to record " | |
1541 | "execution log."); | |
2ed4b548 | 1542 | return TARGET_XFER_E_IO; |
d02ed0bb | 1543 | } |
88d1aa9d MM |
1544 | record_full_list->next = record_full_arch_list_head; |
1545 | record_full_arch_list_head->prev = record_full_list; | |
1546 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1547 | |
7ee70bf5 | 1548 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1549 | record_full_list_release_first (); |
d02ed0bb | 1550 | else |
88d1aa9d | 1551 | record_full_insn_num++; |
d02ed0bb MM |
1552 | } |
1553 | ||
6b84065d TT |
1554 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
1555 | readbuf, writebuf, offset, | |
1556 | len, xfered_len); | |
d02ed0bb MM |
1557 | } |
1558 | ||
1559 | /* This structure represents a breakpoint inserted while the record | |
1560 | target is active. We use this to know when to install/remove | |
1561 | breakpoints in/from the target beneath. For example, a breakpoint | |
1562 | may be inserted while recording, but removed when not replaying nor | |
1563 | recording. In that case, the breakpoint had not been inserted on | |
1564 | the target beneath, so we should not try to remove it there. */ | |
1565 | ||
88d1aa9d | 1566 | struct record_full_breakpoint |
d02ed0bb MM |
1567 | { |
1568 | /* The address and address space the breakpoint was set at. */ | |
1569 | struct address_space *address_space; | |
1570 | CORE_ADDR addr; | |
1571 | ||
1572 | /* True when the breakpoint has been also installed in the target | |
1573 | beneath. This will be false for breakpoints set during replay or | |
1574 | when recording. */ | |
1575 | int in_target_beneath; | |
1576 | }; | |
1577 | ||
88d1aa9d MM |
1578 | typedef struct record_full_breakpoint *record_full_breakpoint_p; |
1579 | DEF_VEC_P(record_full_breakpoint_p); | |
d02ed0bb MM |
1580 | |
1581 | /* The list of breakpoints inserted while the record target is | |
1582 | active. */ | |
88d1aa9d | 1583 | VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL; |
d02ed0bb MM |
1584 | |
1585 | static void | |
88d1aa9d | 1586 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1587 | { |
1588 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1589 | return; | |
1590 | ||
1591 | if (loc->inserted) | |
1592 | { | |
88d1aa9d | 1593 | struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1594 | |
1595 | bp->addr = loc->target_info.placed_address; | |
1596 | bp->address_space = loc->target_info.placed_address_space; | |
1597 | ||
1598 | bp->in_target_beneath = 1; | |
1599 | ||
88d1aa9d | 1600 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1601 | } |
1602 | } | |
1603 | ||
88d1aa9d | 1604 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1605 | |
1606 | static void | |
88d1aa9d | 1607 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1608 | { |
88d1aa9d | 1609 | VEC_free (record_full_breakpoint_p, record_full_breakpoints); |
d02ed0bb | 1610 | |
88d1aa9d | 1611 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1612 | } |
1613 | ||
88d1aa9d | 1614 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1615 | insert or remove breakpoints in the real target when replaying, nor |
1616 | when recording. */ | |
1617 | ||
1618 | static int | |
3db08215 MM |
1619 | record_full_insert_breakpoint (struct target_ops *ops, |
1620 | struct gdbarch *gdbarch, | |
88d1aa9d | 1621 | struct bp_target_info *bp_tgt) |
d02ed0bb | 1622 | { |
88d1aa9d | 1623 | struct record_full_breakpoint *bp; |
d02ed0bb MM |
1624 | int in_target_beneath = 0; |
1625 | ||
88d1aa9d | 1626 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1627 | { |
1628 | /* When recording, we currently always single-step, so we don't | |
1629 | really need to install regular breakpoints in the inferior. | |
1630 | However, we do have to insert software single-step | |
1631 | breakpoints, in case the target can't hardware step. To keep | |
1632 | things single, we always insert. */ | |
1633 | struct cleanup *old_cleanups; | |
1634 | int ret; | |
1635 | ||
25ea693b | 1636 | old_cleanups = record_full_gdb_operation_disable_set (); |
6b84065d | 1637 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
d02ed0bb MM |
1638 | do_cleanups (old_cleanups); |
1639 | ||
1640 | if (ret != 0) | |
1641 | return ret; | |
1642 | ||
1643 | in_target_beneath = 1; | |
1644 | } | |
1645 | ||
88d1aa9d | 1646 | bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1647 | bp->addr = bp_tgt->placed_address; |
1648 | bp->address_space = bp_tgt->placed_address_space; | |
1649 | bp->in_target_beneath = in_target_beneath; | |
88d1aa9d | 1650 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1651 | return 0; |
1652 | } | |
1653 | ||
1654 | /* "to_remove_breakpoint" method for process record target. */ | |
1655 | ||
1656 | static int | |
3db08215 MM |
1657 | record_full_remove_breakpoint (struct target_ops *ops, |
1658 | struct gdbarch *gdbarch, | |
88d1aa9d | 1659 | struct bp_target_info *bp_tgt) |
d02ed0bb | 1660 | { |
88d1aa9d | 1661 | struct record_full_breakpoint *bp; |
d02ed0bb MM |
1662 | int ix; |
1663 | ||
1664 | for (ix = 0; | |
88d1aa9d MM |
1665 | VEC_iterate (record_full_breakpoint_p, |
1666 | record_full_breakpoints, ix, bp); | |
d02ed0bb MM |
1667 | ++ix) |
1668 | { | |
1669 | if (bp->addr == bp_tgt->placed_address | |
1670 | && bp->address_space == bp_tgt->placed_address_space) | |
1671 | { | |
1672 | if (bp->in_target_beneath) | |
1673 | { | |
1674 | struct cleanup *old_cleanups; | |
1675 | int ret; | |
1676 | ||
25ea693b | 1677 | old_cleanups = record_full_gdb_operation_disable_set (); |
6b84065d TT |
1678 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, |
1679 | bp_tgt); | |
d02ed0bb MM |
1680 | do_cleanups (old_cleanups); |
1681 | ||
1682 | if (ret != 0) | |
1683 | return ret; | |
1684 | } | |
1685 | ||
88d1aa9d MM |
1686 | VEC_unordered_remove (record_full_breakpoint_p, |
1687 | record_full_breakpoints, ix); | |
d02ed0bb MM |
1688 | return 0; |
1689 | } | |
1690 | } | |
1691 | ||
1692 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1693 | } | |
1694 | ||
1695 | /* "to_can_execute_reverse" method for process record target. */ | |
1696 | ||
1697 | static int | |
19db3e69 | 1698 | record_full_can_execute_reverse (struct target_ops *self) |
d02ed0bb MM |
1699 | { |
1700 | return 1; | |
1701 | } | |
1702 | ||
1703 | /* "to_get_bookmark" method for process record and prec over core. */ | |
1704 | ||
1705 | static gdb_byte * | |
dd0e2830 | 1706 | record_full_get_bookmark (struct target_ops *self, char *args, int from_tty) |
d02ed0bb | 1707 | { |
0f928d68 | 1708 | char *ret = NULL; |
d02ed0bb MM |
1709 | |
1710 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1711 | if (record_full_list && record_full_list->type == record_full_end) |
1712 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1713 | |
1714 | if (record_debug) | |
1715 | { | |
1716 | if (ret) | |
1717 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1718 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1719 | else |
1720 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1721 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1722 | } |
0f928d68 | 1723 | return (gdb_byte *) ret; |
d02ed0bb MM |
1724 | } |
1725 | ||
1726 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1727 | ||
1728 | static void | |
3c80fb48 TT |
1729 | record_full_goto_bookmark (struct target_ops *self, |
1730 | gdb_byte *raw_bookmark, int from_tty) | |
d02ed0bb | 1731 | { |
0f928d68 PA |
1732 | char *bookmark = (char *) raw_bookmark; |
1733 | ||
d02ed0bb MM |
1734 | if (record_debug) |
1735 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1736 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb MM |
1737 | |
1738 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1739 | { | |
1740 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) | |
1741 | error (_("Unbalanced quotes: %s"), bookmark); | |
1742 | ||
1743 | /* Strip trailing quote. */ | |
1744 | bookmark[strlen (bookmark) - 1] = '\0'; | |
1745 | /* Strip leading quote. */ | |
1746 | bookmark++; | |
88d1aa9d | 1747 | /* Pass along to cmd_record_full_goto. */ |
d02ed0bb MM |
1748 | } |
1749 | ||
0f928d68 | 1750 | cmd_record_goto (bookmark, from_tty); |
d02ed0bb MM |
1751 | return; |
1752 | } | |
1753 | ||
d02ed0bb | 1754 | static enum exec_direction_kind |
4c612759 | 1755 | record_full_execution_direction (struct target_ops *self) |
d02ed0bb | 1756 | { |
88d1aa9d | 1757 | return record_full_execution_dir; |
d02ed0bb MM |
1758 | } |
1759 | ||
1760 | static void | |
630d6a4a | 1761 | record_full_info (struct target_ops *self) |
d02ed0bb | 1762 | { |
88d1aa9d | 1763 | struct record_full_entry *p; |
d02ed0bb | 1764 | |
88d1aa9d | 1765 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1766 | printf_filtered (_("Replay mode:\n")); |
1767 | else | |
1768 | printf_filtered (_("Record mode:\n")); | |
1769 | ||
1770 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1771 | for (p = record_full_first.next; |
1772 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1773 | p = p->next) |
1774 | ; | |
1775 | ||
1776 | /* Do we have a log at all? */ | |
88d1aa9d | 1777 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1778 | { |
1779 | /* Display instruction number for first instruction in the log. */ | |
1780 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1781 | pulongest (p->u.end.insn_num)); | |
1782 | ||
1783 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1784 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1785 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1786 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1787 | |
1788 | /* Display instruction number for last instruction in the log. */ | |
1789 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1790 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1791 | |
1792 | /* Display log count. */ | |
7ee70bf5 | 1793 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1794 | record_full_insn_num); |
d02ed0bb MM |
1795 | } |
1796 | else | |
1797 | printf_filtered (_("No instructions have been logged.\n")); | |
1798 | ||
1799 | /* Display max log size. */ | |
7ee70bf5 | 1800 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1801 | record_full_insn_max_num); |
d02ed0bb MM |
1802 | } |
1803 | ||
1804 | /* The "to_record_delete" target method. */ | |
1805 | ||
1806 | static void | |
d1b55219 | 1807 | record_full_delete (struct target_ops *self) |
d02ed0bb | 1808 | { |
88d1aa9d | 1809 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1810 | } |
1811 | ||
1812 | /* The "to_record_is_replaying" target method. */ | |
1813 | ||
1814 | static int | |
1c63c994 | 1815 | record_full_is_replaying (struct target_ops *self) |
d02ed0bb | 1816 | { |
88d1aa9d | 1817 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1818 | } |
1819 | ||
1820 | /* Go to a specific entry. */ | |
1821 | ||
1822 | static void | |
88d1aa9d | 1823 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1824 | { |
1825 | if (p == NULL) | |
1826 | error (_("Target insn not found.")); | |
88d1aa9d | 1827 | else if (p == record_full_list) |
d02ed0bb | 1828 | error (_("Already at target insn.")); |
88d1aa9d | 1829 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1830 | { |
1831 | printf_filtered (_("Go forward to insn number %s\n"), | |
1832 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1833 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
1834 | } |
1835 | else | |
1836 | { | |
1837 | printf_filtered (_("Go backward to insn number %s\n"), | |
1838 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1839 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
1840 | } |
1841 | ||
1842 | registers_changed (); | |
1843 | reinit_frame_cache (); | |
08d72866 | 1844 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
1845 | } |
1846 | ||
1847 | /* The "to_goto_record_begin" target method. */ | |
1848 | ||
1849 | static void | |
08475817 | 1850 | record_full_goto_begin (struct target_ops *self) |
d02ed0bb | 1851 | { |
88d1aa9d | 1852 | struct record_full_entry *p = NULL; |
d02ed0bb | 1853 | |
88d1aa9d MM |
1854 | for (p = &record_full_first; p != NULL; p = p->next) |
1855 | if (p->type == record_full_end) | |
d02ed0bb MM |
1856 | break; |
1857 | ||
88d1aa9d | 1858 | record_full_goto_entry (p); |
d02ed0bb MM |
1859 | } |
1860 | ||
1861 | /* The "to_goto_record_end" target method. */ | |
1862 | ||
1863 | static void | |
307a1b91 | 1864 | record_full_goto_end (struct target_ops *self) |
d02ed0bb | 1865 | { |
88d1aa9d | 1866 | struct record_full_entry *p = NULL; |
d02ed0bb | 1867 | |
88d1aa9d | 1868 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
1869 | ; |
1870 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 1871 | if (p->type == record_full_end) |
d02ed0bb MM |
1872 | break; |
1873 | ||
88d1aa9d | 1874 | record_full_goto_entry (p); |
d02ed0bb MM |
1875 | } |
1876 | ||
1877 | /* The "to_goto_record" target method. */ | |
1878 | ||
1879 | static void | |
606183ac | 1880 | record_full_goto (struct target_ops *self, ULONGEST target_insn) |
d02ed0bb | 1881 | { |
88d1aa9d | 1882 | struct record_full_entry *p = NULL; |
d02ed0bb | 1883 | |
88d1aa9d MM |
1884 | for (p = &record_full_first; p != NULL; p = p->next) |
1885 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
1886 | break; |
1887 | ||
88d1aa9d | 1888 | record_full_goto_entry (p); |
d02ed0bb MM |
1889 | } |
1890 | ||
1891 | static void | |
88d1aa9d | 1892 | init_record_full_ops (void) |
d02ed0bb | 1893 | { |
88d1aa9d MM |
1894 | record_full_ops.to_shortname = "record-full"; |
1895 | record_full_ops.to_longname = "Process record and replay target"; | |
1896 | record_full_ops.to_doc = | |
d02ed0bb | 1897 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
1898 | record_full_ops.to_open = record_full_open; |
1899 | record_full_ops.to_close = record_full_close; | |
1900 | record_full_ops.to_resume = record_full_resume; | |
1901 | record_full_ops.to_wait = record_full_wait; | |
7c1687a9 MM |
1902 | record_full_ops.to_disconnect = record_disconnect; |
1903 | record_full_ops.to_detach = record_detach; | |
1904 | record_full_ops.to_mourn_inferior = record_mourn_inferior; | |
1905 | record_full_ops.to_kill = record_kill; | |
88d1aa9d MM |
1906 | record_full_ops.to_store_registers = record_full_store_registers; |
1907 | record_full_ops.to_xfer_partial = record_full_xfer_partial; | |
1908 | record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint; | |
1909 | record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint; | |
1910 | record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint; | |
1911 | record_full_ops.to_stopped_data_address = record_full_stopped_data_address; | |
1912 | record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse; | |
1913 | record_full_ops.to_stratum = record_stratum; | |
d02ed0bb | 1914 | /* Add bookmark target methods. */ |
88d1aa9d MM |
1915 | record_full_ops.to_get_bookmark = record_full_get_bookmark; |
1916 | record_full_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
1917 | record_full_ops.to_execution_direction = record_full_execution_direction; |
1918 | record_full_ops.to_info_record = record_full_info; | |
1919 | record_full_ops.to_save_record = record_full_save; | |
1920 | record_full_ops.to_delete_record = record_full_delete; | |
1921 | record_full_ops.to_record_is_replaying = record_full_is_replaying; | |
1922 | record_full_ops.to_goto_record_begin = record_full_goto_begin; | |
1923 | record_full_ops.to_goto_record_end = record_full_goto_end; | |
1924 | record_full_ops.to_goto_record = record_full_goto; | |
1925 | record_full_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
1926 | } |
1927 | ||
1928 | /* "to_resume" method for prec over corefile. */ | |
1929 | ||
1930 | static void | |
88d1aa9d MM |
1931 | record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step, |
1932 | enum gdb_signal signal) | |
d02ed0bb | 1933 | { |
88d1aa9d MM |
1934 | record_full_resume_step = step; |
1935 | record_full_resumed = 1; | |
1936 | record_full_execution_dir = execution_direction; | |
d02ed0bb MM |
1937 | |
1938 | /* We are about to start executing the inferior (or simulate it), | |
1939 | let's register it with the event loop. */ | |
1940 | if (target_can_async_p ()) | |
1941 | { | |
1942 | target_async (inferior_event_handler, 0); | |
1943 | ||
1944 | /* Notify the event loop there's an event to wait for. */ | |
88d1aa9d | 1945 | mark_async_event_handler (record_full_async_inferior_event_token); |
d02ed0bb MM |
1946 | } |
1947 | } | |
1948 | ||
1949 | /* "to_kill" method for prec over corefile. */ | |
1950 | ||
1951 | static void | |
88d1aa9d | 1952 | record_full_core_kill (struct target_ops *ops) |
d02ed0bb MM |
1953 | { |
1954 | if (record_debug) | |
88d1aa9d | 1955 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 1956 | |
88d1aa9d | 1957 | unpush_target (&record_full_core_ops); |
d02ed0bb MM |
1958 | } |
1959 | ||
1960 | /* "to_fetch_registers" method for prec over corefile. */ | |
1961 | ||
1962 | static void | |
88d1aa9d MM |
1963 | record_full_core_fetch_registers (struct target_ops *ops, |
1964 | struct regcache *regcache, | |
1965 | int regno) | |
d02ed0bb MM |
1966 | { |
1967 | if (regno < 0) | |
1968 | { | |
1969 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
1970 | int i; | |
1971 | ||
1972 | for (i = 0; i < num; i ++) | |
1973 | regcache_raw_supply (regcache, i, | |
88d1aa9d | 1974 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb MM |
1975 | } |
1976 | else | |
1977 | regcache_raw_supply (regcache, regno, | |
88d1aa9d | 1978 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
1979 | } |
1980 | ||
1981 | /* "to_prepare_to_store" method for prec over corefile. */ | |
1982 | ||
1983 | static void | |
f32dbf8c MM |
1984 | record_full_core_prepare_to_store (struct target_ops *self, |
1985 | struct regcache *regcache) | |
d02ed0bb MM |
1986 | { |
1987 | } | |
1988 | ||
1989 | /* "to_store_registers" method for prec over corefile. */ | |
1990 | ||
1991 | static void | |
88d1aa9d | 1992 | record_full_core_store_registers (struct target_ops *ops, |
d02ed0bb MM |
1993 | struct regcache *regcache, |
1994 | int regno) | |
1995 | { | |
88d1aa9d | 1996 | if (record_full_gdb_operation_disable) |
d02ed0bb | 1997 | regcache_raw_collect (regcache, regno, |
88d1aa9d | 1998 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
1999 | else |
2000 | error (_("You can't do that without a process to debug.")); | |
2001 | } | |
2002 | ||
2003 | /* "to_xfer_partial" method for prec over corefile. */ | |
2004 | ||
9b409511 | 2005 | static enum target_xfer_status |
88d1aa9d MM |
2006 | record_full_core_xfer_partial (struct target_ops *ops, |
2007 | enum target_object object, | |
2008 | const char *annex, gdb_byte *readbuf, | |
2009 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 2010 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb MM |
2011 | { |
2012 | if (object == TARGET_OBJECT_MEMORY) | |
2013 | { | |
88d1aa9d | 2014 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb MM |
2015 | { |
2016 | struct target_section *p; | |
2017 | ||
88d1aa9d | 2018 | for (p = record_full_core_start; p < record_full_core_end; p++) |
d02ed0bb MM |
2019 | { |
2020 | if (offset >= p->addr) | |
2021 | { | |
88d1aa9d | 2022 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2023 | ULONGEST sec_offset; |
2024 | ||
2025 | if (offset >= p->endaddr) | |
2026 | continue; | |
2027 | ||
2028 | if (offset + len > p->endaddr) | |
2029 | len = p->endaddr - offset; | |
2030 | ||
2031 | sec_offset = offset - p->addr; | |
2032 | ||
2033 | /* Read readbuf or write writebuf p, offset, len. */ | |
2034 | /* Check flags. */ | |
2035 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2036 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2037 | { | |
2038 | if (readbuf) | |
2039 | memset (readbuf, 0, len); | |
9b409511 YQ |
2040 | |
2041 | *xfered_len = len; | |
2042 | return TARGET_XFER_OK; | |
d02ed0bb | 2043 | } |
88d1aa9d MM |
2044 | /* Get record_full_core_buf_entry. */ |
2045 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb MM |
2046 | entry = entry->prev) |
2047 | if (entry->p == p) | |
2048 | break; | |
2049 | if (writebuf) | |
2050 | { | |
2051 | if (!entry) | |
2052 | { | |
2053 | /* Add a new entry. */ | |
88d1aa9d MM |
2054 | entry = (struct record_full_core_buf_entry *) |
2055 | xmalloc | |
2056 | (sizeof (struct record_full_core_buf_entry)); | |
d02ed0bb | 2057 | entry->p = p; |
2b2848e2 DE |
2058 | if (!bfd_malloc_and_get_section |
2059 | (p->the_bfd_section->owner, | |
2060 | p->the_bfd_section, | |
2061 | &entry->buf)) | |
d02ed0bb MM |
2062 | { |
2063 | xfree (entry); | |
9b409511 | 2064 | return TARGET_XFER_EOF; |
d02ed0bb | 2065 | } |
88d1aa9d MM |
2066 | entry->prev = record_full_core_buf_list; |
2067 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2068 | } |
2069 | ||
2070 | memcpy (entry->buf + sec_offset, writebuf, | |
2071 | (size_t) len); | |
2072 | } | |
2073 | else | |
2074 | { | |
2075 | if (!entry) | |
6b84065d TT |
2076 | return ops->beneath->to_xfer_partial (ops->beneath, |
2077 | object, annex, | |
2078 | readbuf, writebuf, | |
2079 | offset, len, | |
2080 | xfered_len); | |
d02ed0bb MM |
2081 | |
2082 | memcpy (readbuf, entry->buf + sec_offset, | |
2083 | (size_t) len); | |
2084 | } | |
2085 | ||
9b409511 YQ |
2086 | *xfered_len = len; |
2087 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2088 | } |
2089 | } | |
2090 | ||
2ed4b548 | 2091 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2092 | } |
2093 | else | |
2094 | error (_("You can't do that without a process to debug.")); | |
2095 | } | |
2096 | ||
6b84065d TT |
2097 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2098 | readbuf, writebuf, offset, len, | |
2099 | xfered_len); | |
d02ed0bb MM |
2100 | } |
2101 | ||
2102 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2103 | ||
2104 | static int | |
3db08215 MM |
2105 | record_full_core_insert_breakpoint (struct target_ops *ops, |
2106 | struct gdbarch *gdbarch, | |
88d1aa9d | 2107 | struct bp_target_info *bp_tgt) |
d02ed0bb MM |
2108 | { |
2109 | return 0; | |
2110 | } | |
2111 | ||
2112 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2113 | ||
2114 | static int | |
3db08215 MM |
2115 | record_full_core_remove_breakpoint (struct target_ops *ops, |
2116 | struct gdbarch *gdbarch, | |
88d1aa9d | 2117 | struct bp_target_info *bp_tgt) |
d02ed0bb MM |
2118 | { |
2119 | return 0; | |
2120 | } | |
2121 | ||
2122 | /* "to_has_execution" method for prec over corefile. */ | |
2123 | ||
2124 | static int | |
88d1aa9d | 2125 | record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid) |
d02ed0bb MM |
2126 | { |
2127 | return 1; | |
2128 | } | |
2129 | ||
2130 | static void | |
88d1aa9d | 2131 | init_record_full_core_ops (void) |
d02ed0bb | 2132 | { |
88d1aa9d MM |
2133 | record_full_core_ops.to_shortname = "record-core"; |
2134 | record_full_core_ops.to_longname = "Process record and replay target"; | |
2135 | record_full_core_ops.to_doc = | |
d02ed0bb | 2136 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
2137 | record_full_core_ops.to_open = record_full_open; |
2138 | record_full_core_ops.to_close = record_full_close; | |
2139 | record_full_core_ops.to_resume = record_full_core_resume; | |
2140 | record_full_core_ops.to_wait = record_full_wait; | |
2141 | record_full_core_ops.to_kill = record_full_core_kill; | |
2142 | record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers; | |
2143 | record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store; | |
2144 | record_full_core_ops.to_store_registers = record_full_core_store_registers; | |
2145 | record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial; | |
2146 | record_full_core_ops.to_insert_breakpoint | |
2147 | = record_full_core_insert_breakpoint; | |
2148 | record_full_core_ops.to_remove_breakpoint | |
2149 | = record_full_core_remove_breakpoint; | |
2150 | record_full_core_ops.to_stopped_by_watchpoint | |
2151 | = record_full_stopped_by_watchpoint; | |
2152 | record_full_core_ops.to_stopped_data_address | |
2153 | = record_full_stopped_data_address; | |
2154 | record_full_core_ops.to_can_execute_reverse | |
2155 | = record_full_can_execute_reverse; | |
2156 | record_full_core_ops.to_has_execution = record_full_core_has_execution; | |
2157 | record_full_core_ops.to_stratum = record_stratum; | |
d02ed0bb | 2158 | /* Add bookmark target methods. */ |
88d1aa9d MM |
2159 | record_full_core_ops.to_get_bookmark = record_full_get_bookmark; |
2160 | record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
2161 | record_full_core_ops.to_execution_direction |
2162 | = record_full_execution_direction; | |
2163 | record_full_core_ops.to_info_record = record_full_info; | |
2164 | record_full_core_ops.to_delete_record = record_full_delete; | |
2165 | record_full_core_ops.to_record_is_replaying = record_full_is_replaying; | |
2166 | record_full_core_ops.to_goto_record_begin = record_full_goto_begin; | |
2167 | record_full_core_ops.to_goto_record_end = record_full_goto_end; | |
2168 | record_full_core_ops.to_goto_record = record_full_goto; | |
2169 | record_full_core_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2170 | } |
2171 | ||
2172 | /* Record log save-file format | |
2173 | Version 1 (never released) | |
2174 | ||
2175 | Header: | |
2176 | 4 bytes: magic number htonl(0x20090829). | |
2177 | NOTE: be sure to change whenever this file format changes! | |
2178 | ||
2179 | Records: | |
88d1aa9d MM |
2180 | record_full_end: |
2181 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2182 | record_full_reg: | |
2183 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2184 | 8 bytes: register id (network byte order). |
2185 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2186 | record_full_mem: |
2187 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2188 | 8 bytes: memory length (network byte order). |
2189 | 8 bytes: memory address (network byte order). | |
2190 | n bytes: memory value (n == memory length). | |
2191 | ||
2192 | Version 2 | |
2193 | 4 bytes: magic number netorder32(0x20091016). | |
2194 | NOTE: be sure to change whenever this file format changes! | |
2195 | ||
2196 | Records: | |
88d1aa9d MM |
2197 | record_full_end: |
2198 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2199 | 4 bytes: signal |
2200 | 4 bytes: instruction count | |
88d1aa9d MM |
2201 | record_full_reg: |
2202 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2203 | 4 bytes: register id (network byte order). |
2204 | n bytes: register value (n == actual register size). | |
2205 | (eg. 4 bytes for x86 general registers). | |
88d1aa9d MM |
2206 | record_full_mem: |
2207 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2208 | 4 bytes: memory length (network byte order). |
2209 | 8 bytes: memory address (network byte order). | |
2210 | n bytes: memory value (n == memory length). | |
2211 | ||
2212 | */ | |
2213 | ||
2214 | /* bfdcore_read -- read bytes from a core file section. */ | |
2215 | ||
2216 | static inline void | |
2217 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2218 | { | |
2219 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2220 | ||
2221 | if (ret) | |
2222 | *offset += len; | |
2223 | else | |
2224 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2225 | len, bfd_get_filename (obfd), | |
2226 | bfd_errmsg (bfd_get_error ())); | |
2227 | } | |
2228 | ||
2229 | static inline uint64_t | |
2230 | netorder64 (uint64_t input) | |
2231 | { | |
2232 | uint64_t ret; | |
2233 | ||
2234 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2235 | BFD_ENDIAN_BIG, input); | |
2236 | return ret; | |
2237 | } | |
2238 | ||
2239 | static inline uint32_t | |
2240 | netorder32 (uint32_t input) | |
2241 | { | |
2242 | uint32_t ret; | |
2243 | ||
2244 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2245 | BFD_ENDIAN_BIG, input); | |
2246 | return ret; | |
2247 | } | |
2248 | ||
2249 | static inline uint16_t | |
2250 | netorder16 (uint16_t input) | |
2251 | { | |
2252 | uint16_t ret; | |
2253 | ||
2254 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2255 | BFD_ENDIAN_BIG, input); | |
2256 | return ret; | |
2257 | } | |
2258 | ||
2259 | /* Restore the execution log from a core_bfd file. */ | |
2260 | static void | |
88d1aa9d | 2261 | record_full_restore (void) |
d02ed0bb MM |
2262 | { |
2263 | uint32_t magic; | |
2264 | struct cleanup *old_cleanups; | |
88d1aa9d | 2265 | struct record_full_entry *rec; |
d02ed0bb MM |
2266 | asection *osec; |
2267 | uint32_t osec_size; | |
2268 | int bfd_offset = 0; | |
2269 | struct regcache *regcache; | |
2270 | ||
2271 | /* We restore the execution log from the open core bfd, | |
2272 | if there is one. */ | |
2273 | if (core_bfd == NULL) | |
2274 | return; | |
2275 | ||
88d1aa9d MM |
2276 | /* "record_full_restore" can only be called when record list is empty. */ |
2277 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2278 | |
2279 | if (record_debug) | |
2280 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2281 | ||
2282 | /* Now need to find our special note section. */ | |
2283 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2284 | if (record_debug) | |
2285 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2286 | osec ? "succeeded" : "failed"); | |
2287 | if (osec == NULL) | |
2288 | return; | |
2289 | osec_size = bfd_section_size (core_bfd, osec); | |
2290 | if (record_debug) | |
2291 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); | |
2292 | ||
2293 | /* Check the magic code. */ | |
2294 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2295 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2296 | error (_("Version mis-match or file format error in core file %s."), |
2297 | bfd_get_filename (core_bfd)); | |
2298 | if (record_debug) | |
2299 | fprintf_unfiltered (gdb_stdlog, | |
2300 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2301 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2302 | phex_nz (netorder32 (magic), 4)); |
2303 | ||
88d1aa9d MM |
2304 | /* Restore the entries in recfd into record_full_arch_list_head and |
2305 | record_full_arch_list_tail. */ | |
2306 | record_full_arch_list_head = NULL; | |
2307 | record_full_arch_list_tail = NULL; | |
2308 | record_full_insn_num = 0; | |
2309 | old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb MM |
2310 | regcache = get_current_regcache (); |
2311 | ||
2312 | while (1) | |
2313 | { | |
2314 | uint8_t rectype; | |
2315 | uint32_t regnum, len, signal, count; | |
2316 | uint64_t addr; | |
2317 | ||
2318 | /* We are finished when offset reaches osec_size. */ | |
2319 | if (bfd_offset >= osec_size) | |
2320 | break; | |
2321 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
2322 | ||
2323 | switch (rectype) | |
2324 | { | |
88d1aa9d | 2325 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2326 | /* Get register number to regnum. */ |
2327 | bfdcore_read (core_bfd, osec, ®num, | |
2328 | sizeof (regnum), &bfd_offset); | |
2329 | regnum = netorder32 (regnum); | |
2330 | ||
88d1aa9d | 2331 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb MM |
2332 | |
2333 | /* Get val. */ | |
88d1aa9d | 2334 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2335 | rec->u.reg.len, &bfd_offset); |
2336 | ||
2337 | if (record_debug) | |
2338 | fprintf_unfiltered (gdb_stdlog, | |
2339 | " Reading register %d (1 " | |
2340 | "plus %lu plus %d bytes)\n", | |
2341 | rec->u.reg.num, | |
2342 | (unsigned long) sizeof (regnum), | |
2343 | rec->u.reg.len); | |
2344 | break; | |
2345 | ||
88d1aa9d | 2346 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2347 | /* Get len. */ |
2348 | bfdcore_read (core_bfd, osec, &len, | |
2349 | sizeof (len), &bfd_offset); | |
2350 | len = netorder32 (len); | |
2351 | ||
2352 | /* Get addr. */ | |
2353 | bfdcore_read (core_bfd, osec, &addr, | |
2354 | sizeof (addr), &bfd_offset); | |
2355 | addr = netorder64 (addr); | |
2356 | ||
88d1aa9d | 2357 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb MM |
2358 | |
2359 | /* Get val. */ | |
88d1aa9d | 2360 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2361 | rec->u.mem.len, &bfd_offset); |
2362 | ||
2363 | if (record_debug) | |
2364 | fprintf_unfiltered (gdb_stdlog, | |
2365 | " Reading memory %s (1 plus " | |
2366 | "%lu plus %lu plus %d bytes)\n", | |
2367 | paddress (get_current_arch (), | |
2368 | rec->u.mem.addr), | |
2369 | (unsigned long) sizeof (addr), | |
2370 | (unsigned long) sizeof (len), | |
2371 | rec->u.mem.len); | |
2372 | break; | |
2373 | ||
88d1aa9d MM |
2374 | case record_full_end: /* end */ |
2375 | rec = record_full_end_alloc (); | |
2376 | record_full_insn_num ++; | |
d02ed0bb MM |
2377 | |
2378 | /* Get signal value. */ | |
2379 | bfdcore_read (core_bfd, osec, &signal, | |
2380 | sizeof (signal), &bfd_offset); | |
2381 | signal = netorder32 (signal); | |
2382 | rec->u.end.sigval = signal; | |
2383 | ||
2384 | /* Get insn count. */ | |
2385 | bfdcore_read (core_bfd, osec, &count, | |
2386 | sizeof (count), &bfd_offset); | |
2387 | count = netorder32 (count); | |
2388 | rec->u.end.insn_num = count; | |
88d1aa9d | 2389 | record_full_insn_count = count + 1; |
d02ed0bb MM |
2390 | if (record_debug) |
2391 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2392 | " Reading record_full_end (1 + " |
d02ed0bb MM |
2393 | "%lu + %lu bytes), offset == %s\n", |
2394 | (unsigned long) sizeof (signal), | |
2395 | (unsigned long) sizeof (count), | |
2396 | paddress (get_current_arch (), | |
2397 | bfd_offset)); | |
2398 | break; | |
2399 | ||
2400 | default: | |
2401 | error (_("Bad entry type in core file %s."), | |
2402 | bfd_get_filename (core_bfd)); | |
2403 | break; | |
2404 | } | |
2405 | ||
2406 | /* Add rec to record arch list. */ | |
88d1aa9d | 2407 | record_full_arch_list_add (rec); |
d02ed0bb MM |
2408 | } |
2409 | ||
2410 | discard_cleanups (old_cleanups); | |
2411 | ||
88d1aa9d MM |
2412 | /* Add record_full_arch_list_head to the end of record list. */ |
2413 | record_full_first.next = record_full_arch_list_head; | |
2414 | record_full_arch_list_head->prev = &record_full_first; | |
2415 | record_full_arch_list_tail->next = NULL; | |
2416 | record_full_list = &record_full_first; | |
d02ed0bb | 2417 | |
88d1aa9d MM |
2418 | /* Update record_full_insn_max_num. */ |
2419 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2420 | { |
88d1aa9d | 2421 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2422 | warning (_("Auto increase record/replay buffer limit to %u."), |
88d1aa9d | 2423 | record_full_insn_max_num); |
d02ed0bb MM |
2424 | } |
2425 | ||
2426 | /* Succeeded. */ | |
2427 | printf_filtered (_("Restored records from core file %s.\n"), | |
2428 | bfd_get_filename (core_bfd)); | |
2429 | ||
08d72866 | 2430 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2431 | } |
2432 | ||
2433 | /* bfdcore_write -- write bytes into a core file section. */ | |
2434 | ||
2435 | static inline void | |
2436 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2437 | { | |
2438 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2439 | ||
2440 | if (ret) | |
2441 | *offset += len; | |
2442 | else | |
2443 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2444 | len, bfd_get_filename (obfd), | |
2445 | bfd_errmsg (bfd_get_error ())); | |
2446 | } | |
2447 | ||
2448 | /* Restore the execution log from a file. We use a modified elf | |
2449 | corefile format, with an extra section for our data. */ | |
2450 | ||
2451 | static void | |
88d1aa9d | 2452 | cmd_record_full_restore (char *args, int from_tty) |
d02ed0bb MM |
2453 | { |
2454 | core_file_command (args, from_tty); | |
88d1aa9d | 2455 | record_full_open (args, from_tty); |
d02ed0bb MM |
2456 | } |
2457 | ||
2458 | static void | |
88d1aa9d | 2459 | record_full_save_cleanups (void *data) |
d02ed0bb MM |
2460 | { |
2461 | bfd *obfd = data; | |
2462 | char *pathname = xstrdup (bfd_get_filename (obfd)); | |
2463 | ||
2464 | gdb_bfd_unref (obfd); | |
2465 | unlink (pathname); | |
2466 | xfree (pathname); | |
2467 | } | |
2468 | ||
2469 | /* Save the execution log to a file. We use a modified elf corefile | |
2470 | format, with an extra section for our data. */ | |
2471 | ||
2472 | static void | |
1390f529 | 2473 | record_full_save (struct target_ops *self, const char *recfilename) |
d02ed0bb | 2474 | { |
88d1aa9d | 2475 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2476 | uint32_t magic; |
2477 | struct regcache *regcache; | |
2478 | struct gdbarch *gdbarch; | |
2479 | struct cleanup *old_cleanups; | |
2480 | struct cleanup *set_cleanups; | |
2481 | bfd *obfd; | |
2482 | int save_size = 0; | |
2483 | asection *osec = NULL; | |
2484 | int bfd_offset = 0; | |
2485 | ||
2486 | /* Open the save file. */ | |
2487 | if (record_debug) | |
2488 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2489 | recfilename); | |
2490 | ||
2491 | /* Open the output file. */ | |
2492 | obfd = create_gcore_bfd (recfilename); | |
88d1aa9d | 2493 | old_cleanups = make_cleanup (record_full_save_cleanups, obfd); |
d02ed0bb | 2494 | |
88d1aa9d MM |
2495 | /* Save the current record entry to "cur_record_full_list". */ |
2496 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2497 | |
2498 | /* Get the values of regcache and gdbarch. */ | |
2499 | regcache = get_current_regcache (); | |
2500 | gdbarch = get_regcache_arch (regcache); | |
2501 | ||
2502 | /* Disable the GDB operation record. */ | |
25ea693b | 2503 | set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
2504 | |
2505 | /* Reverse execute to the begin of record list. */ | |
2506 | while (1) | |
2507 | { | |
2508 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2509 | if (record_full_list == &record_full_first) |
d02ed0bb MM |
2510 | break; |
2511 | ||
88d1aa9d | 2512 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2513 | |
88d1aa9d MM |
2514 | if (record_full_list->prev) |
2515 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2516 | } |
2517 | ||
2518 | /* Compute the size needed for the extra bfd section. */ | |
2519 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2520 | for (record_full_list = record_full_first.next; record_full_list; |
2521 | record_full_list = record_full_list->next) | |
2522 | switch (record_full_list->type) | |
d02ed0bb | 2523 | { |
88d1aa9d | 2524 | case record_full_end: |
d02ed0bb MM |
2525 | save_size += 1 + 4 + 4; |
2526 | break; | |
88d1aa9d MM |
2527 | case record_full_reg: |
2528 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2529 | break; |
88d1aa9d MM |
2530 | case record_full_mem: |
2531 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2532 | break; |
2533 | } | |
2534 | ||
2535 | /* Make the new bfd section. */ | |
2536 | osec = bfd_make_section_anyway_with_flags (obfd, "precord", | |
2537 | SEC_HAS_CONTENTS | |
2538 | | SEC_READONLY); | |
2539 | if (osec == NULL) | |
2540 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2541 | recfilename, | |
2542 | bfd_errmsg (bfd_get_error ())); | |
2543 | bfd_set_section_size (obfd, osec, save_size); | |
2544 | bfd_set_section_vma (obfd, osec, 0); | |
2545 | bfd_set_section_alignment (obfd, osec, 0); | |
2546 | bfd_section_lma (obfd, osec) = 0; | |
2547 | ||
2548 | /* Save corefile state. */ | |
2549 | write_gcore_file (obfd); | |
2550 | ||
2551 | /* Write out the record log. */ | |
2552 | /* Write the magic code. */ | |
88d1aa9d | 2553 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2554 | if (record_debug) |
2555 | fprintf_unfiltered (gdb_stdlog, | |
2556 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2557 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2558 | phex_nz (magic, 4)); |
2559 | bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset); | |
2560 | ||
2561 | /* Save the entries to recfd and forward execute to the end of | |
2562 | record list. */ | |
88d1aa9d | 2563 | record_full_list = &record_full_first; |
d02ed0bb MM |
2564 | while (1) |
2565 | { | |
2566 | /* Save entry. */ | |
88d1aa9d | 2567 | if (record_full_list != &record_full_first) |
d02ed0bb MM |
2568 | { |
2569 | uint8_t type; | |
2570 | uint32_t regnum, len, signal, count; | |
2571 | uint64_t addr; | |
2572 | ||
88d1aa9d | 2573 | type = record_full_list->type; |
d02ed0bb MM |
2574 | bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset); |
2575 | ||
88d1aa9d | 2576 | switch (record_full_list->type) |
d02ed0bb | 2577 | { |
88d1aa9d | 2578 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2579 | if (record_debug) |
2580 | fprintf_unfiltered (gdb_stdlog, | |
2581 | " Writing register %d (1 " | |
2582 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2583 | record_full_list->u.reg.num, |
d02ed0bb | 2584 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2585 | record_full_list->u.reg.len); |
d02ed0bb MM |
2586 | |
2587 | /* Write regnum. */ | |
88d1aa9d | 2588 | regnum = netorder32 (record_full_list->u.reg.num); |
d02ed0bb MM |
2589 | bfdcore_write (obfd, osec, ®num, |
2590 | sizeof (regnum), &bfd_offset); | |
2591 | ||
2592 | /* Write regval. */ | |
88d1aa9d MM |
2593 | bfdcore_write (obfd, osec, |
2594 | record_full_get_loc (record_full_list), | |
2595 | record_full_list->u.reg.len, &bfd_offset); | |
d02ed0bb MM |
2596 | break; |
2597 | ||
88d1aa9d | 2598 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2599 | if (record_debug) |
2600 | fprintf_unfiltered (gdb_stdlog, | |
2601 | " Writing memory %s (1 plus " | |
2602 | "%lu plus %lu plus %d bytes)\n", | |
2603 | paddress (gdbarch, | |
88d1aa9d | 2604 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2605 | (unsigned long) sizeof (addr), |
2606 | (unsigned long) sizeof (len), | |
88d1aa9d | 2607 | record_full_list->u.mem.len); |
d02ed0bb MM |
2608 | |
2609 | /* Write memlen. */ | |
88d1aa9d | 2610 | len = netorder32 (record_full_list->u.mem.len); |
d02ed0bb MM |
2611 | bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset); |
2612 | ||
2613 | /* Write memaddr. */ | |
88d1aa9d | 2614 | addr = netorder64 (record_full_list->u.mem.addr); |
d02ed0bb MM |
2615 | bfdcore_write (obfd, osec, &addr, |
2616 | sizeof (addr), &bfd_offset); | |
2617 | ||
2618 | /* Write memval. */ | |
88d1aa9d MM |
2619 | bfdcore_write (obfd, osec, |
2620 | record_full_get_loc (record_full_list), | |
2621 | record_full_list->u.mem.len, &bfd_offset); | |
d02ed0bb MM |
2622 | break; |
2623 | ||
88d1aa9d | 2624 | case record_full_end: |
d02ed0bb MM |
2625 | if (record_debug) |
2626 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2627 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2628 | "%lu + %lu bytes)\n", |
2629 | (unsigned long) sizeof (signal), | |
2630 | (unsigned long) sizeof (count)); | |
2631 | /* Write signal value. */ | |
88d1aa9d | 2632 | signal = netorder32 (record_full_list->u.end.sigval); |
d02ed0bb MM |
2633 | bfdcore_write (obfd, osec, &signal, |
2634 | sizeof (signal), &bfd_offset); | |
2635 | ||
2636 | /* Write insn count. */ | |
88d1aa9d | 2637 | count = netorder32 (record_full_list->u.end.insn_num); |
d02ed0bb MM |
2638 | bfdcore_write (obfd, osec, &count, |
2639 | sizeof (count), &bfd_offset); | |
2640 | break; | |
2641 | } | |
2642 | } | |
2643 | ||
2644 | /* Execute entry. */ | |
88d1aa9d | 2645 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2646 | |
88d1aa9d MM |
2647 | if (record_full_list->next) |
2648 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
2649 | else |
2650 | break; | |
2651 | } | |
2652 | ||
88d1aa9d | 2653 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2654 | while (1) |
2655 | { | |
2656 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2657 | if (record_full_list == cur_record_full_list) |
d02ed0bb MM |
2658 | break; |
2659 | ||
88d1aa9d | 2660 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2661 | |
88d1aa9d MM |
2662 | if (record_full_list->prev) |
2663 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2664 | } |
2665 | ||
2666 | do_cleanups (set_cleanups); | |
2667 | gdb_bfd_unref (obfd); | |
2668 | discard_cleanups (old_cleanups); | |
2669 | ||
2670 | /* Succeeded. */ | |
2671 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2672 | recfilename); | |
2673 | } | |
2674 | ||
88d1aa9d | 2675 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2676 | depending on DIR) to the given entry, changing the program state |
2677 | correspondingly. */ | |
2678 | ||
2679 | static void | |
88d1aa9d MM |
2680 | record_full_goto_insn (struct record_full_entry *entry, |
2681 | enum exec_direction_kind dir) | |
d02ed0bb | 2682 | { |
25ea693b | 2683 | struct cleanup *set_cleanups = record_full_gdb_operation_disable_set (); |
d02ed0bb MM |
2684 | struct regcache *regcache = get_current_regcache (); |
2685 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2686 | ||
2687 | /* Assume everything is valid: we will hit the entry, | |
2688 | and we will not hit the end of the recording. */ | |
2689 | ||
2690 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2691 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2692 | |
2693 | do | |
2694 | { | |
88d1aa9d | 2695 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2696 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2697 | record_full_list = record_full_list->prev; |
d02ed0bb | 2698 | else |
88d1aa9d MM |
2699 | record_full_list = record_full_list->next; |
2700 | } while (record_full_list != entry); | |
d02ed0bb MM |
2701 | do_cleanups (set_cleanups); |
2702 | } | |
2703 | ||
2704 | /* Alias for "target record-full". */ | |
2705 | ||
2706 | static void | |
88d1aa9d | 2707 | cmd_record_full_start (char *args, int from_tty) |
d02ed0bb MM |
2708 | { |
2709 | execute_command ("target record-full", from_tty); | |
2710 | } | |
2711 | ||
2712 | static void | |
88d1aa9d MM |
2713 | set_record_full_insn_max_num (char *args, int from_tty, |
2714 | struct cmd_list_element *c) | |
d02ed0bb | 2715 | { |
7ee70bf5 | 2716 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2717 | { |
88d1aa9d MM |
2718 | /* Count down record_full_insn_num while releasing records from list. */ |
2719 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2720 | { |
88d1aa9d MM |
2721 | record_full_list_release_first (); |
2722 | record_full_insn_num--; | |
d02ed0bb MM |
2723 | } |
2724 | } | |
2725 | } | |
2726 | ||
2727 | /* The "set record full" command. */ | |
2728 | ||
2729 | static void | |
2730 | set_record_full_command (char *args, int from_tty) | |
2731 | { | |
2732 | printf_unfiltered (_("\"set record full\" must be followed " | |
2733 | "by an apporpriate subcommand.\n")); | |
2734 | help_list (set_record_full_cmdlist, "set record full ", all_commands, | |
2735 | gdb_stdout); | |
2736 | } | |
2737 | ||
2738 | /* The "show record full" command. */ | |
2739 | ||
2740 | static void | |
2741 | show_record_full_command (char *args, int from_tty) | |
2742 | { | |
2743 | cmd_show_list (show_record_full_cmdlist, from_tty, ""); | |
2744 | } | |
2745 | ||
2746 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
2747 | extern initialize_file_ftype _initialize_record_full; | |
2748 | ||
2749 | void | |
2750 | _initialize_record_full (void) | |
2751 | { | |
2752 | struct cmd_list_element *c; | |
2753 | ||
88d1aa9d MM |
2754 | /* Init record_full_first. */ |
2755 | record_full_first.prev = NULL; | |
2756 | record_full_first.next = NULL; | |
2757 | record_full_first.type = record_full_end; | |
d02ed0bb | 2758 | |
88d1aa9d MM |
2759 | init_record_full_ops (); |
2760 | add_target (&record_full_ops); | |
2761 | add_deprecated_target_alias (&record_full_ops, "record"); | |
2762 | init_record_full_core_ops (); | |
2763 | add_target (&record_full_core_ops); | |
d02ed0bb | 2764 | |
88d1aa9d | 2765 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb MM |
2766 | _("Start full execution recording."), &record_full_cmdlist, |
2767 | "record full ", 0, &record_cmdlist); | |
2768 | ||
88d1aa9d | 2769 | c = add_cmd ("restore", class_obscure, cmd_record_full_restore, |
d02ed0bb MM |
2770 | _("Restore the execution log from a file.\n\ |
2771 | Argument is filename. File must be created with 'record save'."), | |
2772 | &record_full_cmdlist); | |
2773 | set_cmd_completer (c, filename_completer); | |
2774 | ||
2775 | /* Deprecate the old version without "full" prefix. */ | |
2776 | c = add_alias_cmd ("restore", "full restore", class_obscure, 1, | |
2777 | &record_cmdlist); | |
2778 | set_cmd_completer (c, filename_completer); | |
2779 | deprecate_cmd (c, "record full restore"); | |
2780 | ||
2781 | add_prefix_cmd ("full", class_support, set_record_full_command, | |
2782 | _("Set record options"), &set_record_full_cmdlist, | |
2783 | "set record full ", 0, &set_record_cmdlist); | |
2784 | ||
2785 | add_prefix_cmd ("full", class_support, show_record_full_command, | |
2786 | _("Show record options"), &show_record_full_cmdlist, | |
2787 | "show record full ", 0, &show_record_cmdlist); | |
2788 | ||
2789 | /* Record instructions number limit command. */ | |
2790 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
88d1aa9d | 2791 | &record_full_stop_at_limit, _("\ |
d02ed0bb MM |
2792 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2793 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2794 | _("Default is ON.\n\ | |
2795 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2796 | When OFF, if the record/replay buffer becomes full,\n\ | |
2797 | delete the oldest recorded instruction to make room for each new one."), | |
2798 | NULL, NULL, | |
2799 | &set_record_full_cmdlist, &show_record_full_cmdlist); | |
2800 | ||
2801 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2802 | &set_record_cmdlist); | |
2803 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2804 | ||
2805 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2806 | &show_record_cmdlist); | |
2807 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2808 | ||
88d1aa9d MM |
2809 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
2810 | &record_full_insn_max_num, | |
d02ed0bb MM |
2811 | _("Set record/replay buffer limit."), |
2812 | _("Show record/replay buffer limit."), _("\ | |
2813 | Set the maximum number of instructions to be stored in the\n\ | |
f81d1120 PA |
2814 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2815 | limit. Default is 200000."), | |
88d1aa9d | 2816 | set_record_full_insn_max_num, |
d02ed0bb MM |
2817 | NULL, &set_record_full_cmdlist, |
2818 | &show_record_full_cmdlist); | |
2819 | ||
2820 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2821 | &set_record_cmdlist); | |
2822 | deprecate_cmd (c, "set record full insn-number-max"); | |
2823 | ||
2824 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2825 | &show_record_cmdlist); | |
2826 | deprecate_cmd (c, "show record full insn-number-max"); | |
2827 | ||
88d1aa9d | 2828 | add_setshow_boolean_cmd ("memory-query", no_class, |
25ea693b | 2829 | &record_full_memory_query, _("\ |
d02ed0bb MM |
2830 | Set whether query if PREC cannot record memory change of next instruction."), |
2831 | _("\ | |
2832 | Show whether query if PREC cannot record memory change of next instruction."), | |
2833 | _("\ | |
2834 | Default is OFF.\n\ | |
2835 | When ON, query if PREC cannot record memory change of next instruction."), | |
2836 | NULL, NULL, | |
88d1aa9d MM |
2837 | &set_record_full_cmdlist, |
2838 | &show_record_full_cmdlist); | |
d02ed0bb MM |
2839 | |
2840 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2841 | &set_record_cmdlist); | |
2842 | deprecate_cmd (c, "set record full memory-query"); | |
2843 | ||
2844 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2845 | &show_record_cmdlist); | |
2846 | deprecate_cmd (c, "show record full memory-query"); | |
2847 | } |