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d02ed0bb MM |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
61baf725 | 3 | Copyright (C) 2013-2017 Free Software Foundation, Inc. |
d02ed0bb MM |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdbcmd.h" | |
22 | #include "regcache.h" | |
23 | #include "gdbthread.h" | |
24 | #include "event-top.h" | |
d02ed0bb MM |
25 | #include "completer.h" |
26 | #include "arch-utils.h" | |
27 | #include "gdbcore.h" | |
28 | #include "exec.h" | |
29 | #include "record.h" | |
30 | #include "record-full.h" | |
31 | #include "elf-bfd.h" | |
32 | #include "gcore.h" | |
33 | #include "event-loop.h" | |
34 | #include "inf-loop.h" | |
35 | #include "gdb_bfd.h" | |
36 | #include "observer.h" | |
45741a9c | 37 | #include "infrun.h" |
bef155c3 | 38 | #include "common/gdb_unlinker.h" |
d7dcbefc | 39 | #include "common/byte-vector.h" |
d02ed0bb MM |
40 | |
41 | #include <signal.h> | |
42 | ||
43 | /* This module implements "target record-full", also known as "process | |
44 | record and replay". This target sits on top of a "normal" target | |
45 | (a target that "has execution"), and provides a record and replay | |
46 | functionality, including reverse debugging. | |
47 | ||
48 | Target record has two modes: recording, and replaying. | |
49 | ||
50 | In record mode, we intercept the to_resume and to_wait methods. | |
51 | Whenever gdb resumes the target, we run the target in single step | |
52 | mode, and we build up an execution log in which, for each executed | |
53 | instruction, we record all changes in memory and register state. | |
54 | This is invisible to the user, to whom it just looks like an | |
55 | ordinary debugging session (except for performance degredation). | |
56 | ||
57 | In replay mode, instead of actually letting the inferior run as a | |
58 | process, we simulate its execution by playing back the recorded | |
59 | execution log. For each instruction in the log, we simulate the | |
60 | instruction's side effects by duplicating the changes that it would | |
61 | have made on memory and registers. */ | |
62 | ||
88d1aa9d | 63 | #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000 |
d02ed0bb | 64 | |
88d1aa9d MM |
65 | #define RECORD_FULL_IS_REPLAY \ |
66 | (record_full_list->next || execution_direction == EXEC_REVERSE) | |
d02ed0bb | 67 | |
88d1aa9d | 68 | #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016) |
d02ed0bb MM |
69 | |
70 | /* These are the core structs of the process record functionality. | |
71 | ||
88d1aa9d MM |
72 | A record_full_entry is a record of the value change of a register |
73 | ("record_full_reg") or a part of memory ("record_full_mem"). And each | |
74 | instruction must have a struct record_full_entry ("record_full_end") | |
75 | that indicates that this is the last struct record_full_entry of this | |
d02ed0bb MM |
76 | instruction. |
77 | ||
88d1aa9d MM |
78 | Each struct record_full_entry is linked to "record_full_list" by "prev" |
79 | and "next" pointers. */ | |
d02ed0bb | 80 | |
88d1aa9d | 81 | struct record_full_mem_entry |
d02ed0bb MM |
82 | { |
83 | CORE_ADDR addr; | |
84 | int len; | |
85 | /* Set this flag if target memory for this entry | |
86 | can no longer be accessed. */ | |
87 | int mem_entry_not_accessible; | |
88 | union | |
89 | { | |
90 | gdb_byte *ptr; | |
91 | gdb_byte buf[sizeof (gdb_byte *)]; | |
92 | } u; | |
93 | }; | |
94 | ||
88d1aa9d | 95 | struct record_full_reg_entry |
d02ed0bb MM |
96 | { |
97 | unsigned short num; | |
98 | unsigned short len; | |
99 | union | |
100 | { | |
101 | gdb_byte *ptr; | |
102 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
103 | } u; | |
104 | }; | |
105 | ||
88d1aa9d | 106 | struct record_full_end_entry |
d02ed0bb MM |
107 | { |
108 | enum gdb_signal sigval; | |
109 | ULONGEST insn_num; | |
110 | }; | |
111 | ||
88d1aa9d | 112 | enum record_full_type |
d02ed0bb | 113 | { |
88d1aa9d MM |
114 | record_full_end = 0, |
115 | record_full_reg, | |
116 | record_full_mem | |
d02ed0bb MM |
117 | }; |
118 | ||
119 | /* This is the data structure that makes up the execution log. | |
120 | ||
121 | The execution log consists of a single linked list of entries | |
88d1aa9d | 122 | of type "struct record_full_entry". It is doubly linked so that it |
d02ed0bb MM |
123 | can be traversed in either direction. |
124 | ||
125 | The start of the list is anchored by a struct called | |
88d1aa9d MM |
126 | "record_full_first". The pointer "record_full_list" either points |
127 | to the last entry that was added to the list (in record mode), or to | |
128 | the next entry in the list that will be executed (in replay mode). | |
d02ed0bb | 129 | |
88d1aa9d MM |
130 | Each list element (struct record_full_entry), in addition to next |
131 | and prev pointers, consists of a union of three entry types: mem, | |
132 | reg, and end. A field called "type" determines which entry type is | |
d02ed0bb MM |
133 | represented by a given list element. |
134 | ||
135 | Each instruction that is added to the execution log is represented | |
136 | by a variable number of list elements ('entries'). The instruction | |
137 | will have one "reg" entry for each register that is changed by | |
138 | executing the instruction (including the PC in every case). It | |
139 | will also have one "mem" entry for each memory change. Finally, | |
140 | each instruction will have an "end" entry that separates it from | |
141 | the changes associated with the next instruction. */ | |
142 | ||
88d1aa9d | 143 | struct record_full_entry |
d02ed0bb | 144 | { |
88d1aa9d MM |
145 | struct record_full_entry *prev; |
146 | struct record_full_entry *next; | |
147 | enum record_full_type type; | |
d02ed0bb MM |
148 | union |
149 | { | |
150 | /* reg */ | |
88d1aa9d | 151 | struct record_full_reg_entry reg; |
d02ed0bb | 152 | /* mem */ |
88d1aa9d | 153 | struct record_full_mem_entry mem; |
d02ed0bb | 154 | /* end */ |
88d1aa9d | 155 | struct record_full_end_entry end; |
d02ed0bb MM |
156 | } u; |
157 | }; | |
158 | ||
159 | /* If true, query if PREC cannot record memory | |
160 | change of next instruction. */ | |
25ea693b | 161 | int record_full_memory_query = 0; |
d02ed0bb | 162 | |
88d1aa9d | 163 | struct record_full_core_buf_entry |
d02ed0bb | 164 | { |
88d1aa9d | 165 | struct record_full_core_buf_entry *prev; |
d02ed0bb MM |
166 | struct target_section *p; |
167 | bfd_byte *buf; | |
168 | }; | |
169 | ||
170 | /* Record buf with core target. */ | |
88d1aa9d MM |
171 | static gdb_byte *record_full_core_regbuf = NULL; |
172 | static struct target_section *record_full_core_start; | |
173 | static struct target_section *record_full_core_end; | |
174 | static struct record_full_core_buf_entry *record_full_core_buf_list = NULL; | |
d02ed0bb MM |
175 | |
176 | /* The following variables are used for managing the linked list that | |
177 | represents the execution log. | |
178 | ||
88d1aa9d MM |
179 | record_full_first is the anchor that holds down the beginning of |
180 | the list. | |
d02ed0bb | 181 | |
88d1aa9d | 182 | record_full_list serves two functions: |
d02ed0bb MM |
183 | 1) In record mode, it anchors the end of the list. |
184 | 2) In replay mode, it traverses the list and points to | |
185 | the next instruction that must be emulated. | |
186 | ||
88d1aa9d MM |
187 | record_full_arch_list_head and record_full_arch_list_tail are used |
188 | to manage a separate list, which is used to build up the change | |
189 | elements of the currently executing instruction during record mode. | |
190 | When this instruction has been completely annotated in the "arch | |
191 | list", it will be appended to the main execution log. */ | |
d02ed0bb | 192 | |
88d1aa9d MM |
193 | static struct record_full_entry record_full_first; |
194 | static struct record_full_entry *record_full_list = &record_full_first; | |
195 | static struct record_full_entry *record_full_arch_list_head = NULL; | |
196 | static struct record_full_entry *record_full_arch_list_tail = NULL; | |
d02ed0bb | 197 | |
88d1aa9d MM |
198 | /* 1 ask user. 0 auto delete the last struct record_full_entry. */ |
199 | static int record_full_stop_at_limit = 1; | |
d02ed0bb | 200 | /* Maximum allowed number of insns in execution log. */ |
88d1aa9d MM |
201 | static unsigned int record_full_insn_max_num |
202 | = DEFAULT_RECORD_FULL_INSN_MAX_NUM; | |
d02ed0bb | 203 | /* Actual count of insns presently in execution log. */ |
7ee70bf5 | 204 | static unsigned int record_full_insn_num = 0; |
d02ed0bb MM |
205 | /* Count of insns logged so far (may be larger |
206 | than count of insns presently in execution log). */ | |
88d1aa9d | 207 | static ULONGEST record_full_insn_count; |
d02ed0bb MM |
208 | |
209 | /* The target_ops of process record. */ | |
88d1aa9d MM |
210 | static struct target_ops record_full_ops; |
211 | static struct target_ops record_full_core_ops; | |
d02ed0bb | 212 | |
8213266a PA |
213 | /* See record-full.h. */ |
214 | ||
215 | int | |
216 | record_full_is_used (void) | |
217 | { | |
218 | struct target_ops *t; | |
219 | ||
220 | t = find_record_target (); | |
221 | return (t == &record_full_ops | |
222 | || t == &record_full_core_ops); | |
223 | } | |
224 | ||
225 | ||
d02ed0bb MM |
226 | /* Command lists for "set/show record full". */ |
227 | static struct cmd_list_element *set_record_full_cmdlist; | |
228 | static struct cmd_list_element *show_record_full_cmdlist; | |
229 | ||
230 | /* Command list for "record full". */ | |
231 | static struct cmd_list_element *record_full_cmdlist; | |
232 | ||
88d1aa9d MM |
233 | static void record_full_goto_insn (struct record_full_entry *entry, |
234 | enum exec_direction_kind dir); | |
1390f529 TT |
235 | static void record_full_save (struct target_ops *self, |
236 | const char *recfilename); | |
88d1aa9d MM |
237 | |
238 | /* Alloc and free functions for record_full_reg, record_full_mem, and | |
239 | record_full_end entries. */ | |
240 | ||
241 | /* Alloc a record_full_reg record entry. */ | |
242 | ||
243 | static inline struct record_full_entry * | |
244 | record_full_reg_alloc (struct regcache *regcache, int regnum) | |
245 | { | |
246 | struct record_full_entry *rec; | |
ac7936df | 247 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb | 248 | |
8d749320 | 249 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 250 | rec->type = record_full_reg; |
d02ed0bb MM |
251 | rec->u.reg.num = regnum; |
252 | rec->u.reg.len = register_size (gdbarch, regnum); | |
253 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
254 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
255 | ||
256 | return rec; | |
257 | } | |
258 | ||
88d1aa9d | 259 | /* Free a record_full_reg record entry. */ |
d02ed0bb MM |
260 | |
261 | static inline void | |
88d1aa9d | 262 | record_full_reg_release (struct record_full_entry *rec) |
d02ed0bb | 263 | { |
88d1aa9d | 264 | gdb_assert (rec->type == record_full_reg); |
d02ed0bb MM |
265 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
266 | xfree (rec->u.reg.u.ptr); | |
267 | xfree (rec); | |
268 | } | |
269 | ||
88d1aa9d | 270 | /* Alloc a record_full_mem record entry. */ |
d02ed0bb | 271 | |
88d1aa9d MM |
272 | static inline struct record_full_entry * |
273 | record_full_mem_alloc (CORE_ADDR addr, int len) | |
d02ed0bb | 274 | { |
88d1aa9d | 275 | struct record_full_entry *rec; |
d02ed0bb | 276 | |
8d749320 | 277 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 278 | rec->type = record_full_mem; |
d02ed0bb MM |
279 | rec->u.mem.addr = addr; |
280 | rec->u.mem.len = len; | |
281 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
282 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
283 | ||
284 | return rec; | |
285 | } | |
286 | ||
88d1aa9d | 287 | /* Free a record_full_mem record entry. */ |
d02ed0bb MM |
288 | |
289 | static inline void | |
88d1aa9d | 290 | record_full_mem_release (struct record_full_entry *rec) |
d02ed0bb | 291 | { |
88d1aa9d | 292 | gdb_assert (rec->type == record_full_mem); |
d02ed0bb MM |
293 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
294 | xfree (rec->u.mem.u.ptr); | |
295 | xfree (rec); | |
296 | } | |
297 | ||
88d1aa9d | 298 | /* Alloc a record_full_end record entry. */ |
d02ed0bb | 299 | |
88d1aa9d MM |
300 | static inline struct record_full_entry * |
301 | record_full_end_alloc (void) | |
d02ed0bb | 302 | { |
88d1aa9d | 303 | struct record_full_entry *rec; |
d02ed0bb | 304 | |
8d749320 | 305 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 306 | rec->type = record_full_end; |
d02ed0bb MM |
307 | |
308 | return rec; | |
309 | } | |
310 | ||
88d1aa9d | 311 | /* Free a record_full_end record entry. */ |
d02ed0bb MM |
312 | |
313 | static inline void | |
88d1aa9d | 314 | record_full_end_release (struct record_full_entry *rec) |
d02ed0bb MM |
315 | { |
316 | xfree (rec); | |
317 | } | |
318 | ||
319 | /* Free one record entry, any type. | |
320 | Return entry->type, in case caller wants to know. */ | |
321 | ||
88d1aa9d MM |
322 | static inline enum record_full_type |
323 | record_full_entry_release (struct record_full_entry *rec) | |
d02ed0bb | 324 | { |
88d1aa9d | 325 | enum record_full_type type = rec->type; |
d02ed0bb MM |
326 | |
327 | switch (type) { | |
88d1aa9d MM |
328 | case record_full_reg: |
329 | record_full_reg_release (rec); | |
d02ed0bb | 330 | break; |
88d1aa9d MM |
331 | case record_full_mem: |
332 | record_full_mem_release (rec); | |
d02ed0bb | 333 | break; |
88d1aa9d MM |
334 | case record_full_end: |
335 | record_full_end_release (rec); | |
d02ed0bb MM |
336 | break; |
337 | } | |
338 | return type; | |
339 | } | |
340 | ||
341 | /* Free all record entries in list pointed to by REC. */ | |
342 | ||
343 | static void | |
88d1aa9d | 344 | record_full_list_release (struct record_full_entry *rec) |
d02ed0bb MM |
345 | { |
346 | if (!rec) | |
347 | return; | |
348 | ||
349 | while (rec->next) | |
350 | rec = rec->next; | |
351 | ||
352 | while (rec->prev) | |
353 | { | |
354 | rec = rec->prev; | |
88d1aa9d | 355 | record_full_entry_release (rec->next); |
d02ed0bb MM |
356 | } |
357 | ||
88d1aa9d | 358 | if (rec == &record_full_first) |
d02ed0bb | 359 | { |
88d1aa9d MM |
360 | record_full_insn_num = 0; |
361 | record_full_first.next = NULL; | |
d02ed0bb MM |
362 | } |
363 | else | |
88d1aa9d | 364 | record_full_entry_release (rec); |
d02ed0bb MM |
365 | } |
366 | ||
367 | /* Free all record entries forward of the given list position. */ | |
368 | ||
369 | static void | |
88d1aa9d | 370 | record_full_list_release_following (struct record_full_entry *rec) |
d02ed0bb | 371 | { |
88d1aa9d | 372 | struct record_full_entry *tmp = rec->next; |
d02ed0bb MM |
373 | |
374 | rec->next = NULL; | |
375 | while (tmp) | |
376 | { | |
377 | rec = tmp->next; | |
88d1aa9d | 378 | if (record_full_entry_release (tmp) == record_full_end) |
d02ed0bb | 379 | { |
88d1aa9d MM |
380 | record_full_insn_num--; |
381 | record_full_insn_count--; | |
d02ed0bb MM |
382 | } |
383 | tmp = rec; | |
384 | } | |
385 | } | |
386 | ||
387 | /* Delete the first instruction from the beginning of the log, to make | |
388 | room for adding a new instruction at the end of the log. | |
389 | ||
88d1aa9d | 390 | Note -- this function does not modify record_full_insn_num. */ |
d02ed0bb MM |
391 | |
392 | static void | |
88d1aa9d | 393 | record_full_list_release_first (void) |
d02ed0bb | 394 | { |
88d1aa9d | 395 | struct record_full_entry *tmp; |
d02ed0bb | 396 | |
88d1aa9d | 397 | if (!record_full_first.next) |
d02ed0bb MM |
398 | return; |
399 | ||
88d1aa9d | 400 | /* Loop until a record_full_end. */ |
d02ed0bb MM |
401 | while (1) |
402 | { | |
88d1aa9d MM |
403 | /* Cut record_full_first.next out of the linked list. */ |
404 | tmp = record_full_first.next; | |
405 | record_full_first.next = tmp->next; | |
406 | tmp->next->prev = &record_full_first; | |
d02ed0bb MM |
407 | |
408 | /* tmp is now isolated, and can be deleted. */ | |
88d1aa9d MM |
409 | if (record_full_entry_release (tmp) == record_full_end) |
410 | break; /* End loop at first record_full_end. */ | |
d02ed0bb | 411 | |
88d1aa9d | 412 | if (!record_full_first.next) |
d02ed0bb | 413 | { |
88d1aa9d | 414 | gdb_assert (record_full_insn_num == 1); |
d02ed0bb MM |
415 | break; /* End loop when list is empty. */ |
416 | } | |
417 | } | |
418 | } | |
419 | ||
88d1aa9d | 420 | /* Add a struct record_full_entry to record_full_arch_list. */ |
d02ed0bb MM |
421 | |
422 | static void | |
88d1aa9d | 423 | record_full_arch_list_add (struct record_full_entry *rec) |
d02ed0bb MM |
424 | { |
425 | if (record_debug > 1) | |
426 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 427 | "Process record: record_full_arch_list_add %s.\n", |
d02ed0bb MM |
428 | host_address_to_string (rec)); |
429 | ||
88d1aa9d | 430 | if (record_full_arch_list_tail) |
d02ed0bb | 431 | { |
88d1aa9d MM |
432 | record_full_arch_list_tail->next = rec; |
433 | rec->prev = record_full_arch_list_tail; | |
434 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
435 | } |
436 | else | |
437 | { | |
88d1aa9d MM |
438 | record_full_arch_list_head = rec; |
439 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
440 | } |
441 | } | |
442 | ||
443 | /* Return the value storage location of a record entry. */ | |
444 | static inline gdb_byte * | |
88d1aa9d | 445 | record_full_get_loc (struct record_full_entry *rec) |
d02ed0bb MM |
446 | { |
447 | switch (rec->type) { | |
88d1aa9d | 448 | case record_full_mem: |
d02ed0bb MM |
449 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
450 | return rec->u.mem.u.ptr; | |
451 | else | |
452 | return rec->u.mem.u.buf; | |
88d1aa9d | 453 | case record_full_reg: |
d02ed0bb MM |
454 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
455 | return rec->u.reg.u.ptr; | |
456 | else | |
457 | return rec->u.reg.u.buf; | |
88d1aa9d | 458 | case record_full_end: |
d02ed0bb | 459 | default: |
88d1aa9d | 460 | gdb_assert_not_reached ("unexpected record_full_entry type"); |
d02ed0bb MM |
461 | return NULL; |
462 | } | |
463 | } | |
464 | ||
88d1aa9d | 465 | /* Record the value of a register NUM to record_full_arch_list. */ |
d02ed0bb MM |
466 | |
467 | int | |
25ea693b | 468 | record_full_arch_list_add_reg (struct regcache *regcache, int regnum) |
d02ed0bb | 469 | { |
88d1aa9d | 470 | struct record_full_entry *rec; |
d02ed0bb MM |
471 | |
472 | if (record_debug > 1) | |
473 | fprintf_unfiltered (gdb_stdlog, | |
474 | "Process record: add register num = %d to " | |
475 | "record list.\n", | |
476 | regnum); | |
477 | ||
88d1aa9d | 478 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 479 | |
88d1aa9d | 480 | regcache_raw_read (regcache, regnum, record_full_get_loc (rec)); |
d02ed0bb | 481 | |
88d1aa9d | 482 | record_full_arch_list_add (rec); |
d02ed0bb MM |
483 | |
484 | return 0; | |
485 | } | |
486 | ||
487 | /* Record the value of a region of memory whose address is ADDR and | |
88d1aa9d | 488 | length is LEN to record_full_arch_list. */ |
d02ed0bb MM |
489 | |
490 | int | |
25ea693b | 491 | record_full_arch_list_add_mem (CORE_ADDR addr, int len) |
d02ed0bb | 492 | { |
88d1aa9d | 493 | struct record_full_entry *rec; |
d02ed0bb MM |
494 | |
495 | if (record_debug > 1) | |
496 | fprintf_unfiltered (gdb_stdlog, | |
497 | "Process record: add mem addr = %s len = %d to " | |
498 | "record list.\n", | |
499 | paddress (target_gdbarch (), addr), len); | |
500 | ||
501 | if (!addr) /* FIXME: Why? Some arch must permit it... */ | |
502 | return 0; | |
503 | ||
88d1aa9d | 504 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb | 505 | |
88d1aa9d MM |
506 | if (record_read_memory (target_gdbarch (), addr, |
507 | record_full_get_loc (rec), len)) | |
d02ed0bb | 508 | { |
88d1aa9d | 509 | record_full_mem_release (rec); |
d02ed0bb MM |
510 | return -1; |
511 | } | |
512 | ||
88d1aa9d | 513 | record_full_arch_list_add (rec); |
d02ed0bb MM |
514 | |
515 | return 0; | |
516 | } | |
517 | ||
88d1aa9d MM |
518 | /* Add a record_full_end type struct record_full_entry to |
519 | record_full_arch_list. */ | |
d02ed0bb MM |
520 | |
521 | int | |
25ea693b | 522 | record_full_arch_list_add_end (void) |
d02ed0bb | 523 | { |
88d1aa9d | 524 | struct record_full_entry *rec; |
d02ed0bb MM |
525 | |
526 | if (record_debug > 1) | |
527 | fprintf_unfiltered (gdb_stdlog, | |
528 | "Process record: add end to arch list.\n"); | |
529 | ||
88d1aa9d | 530 | rec = record_full_end_alloc (); |
d02ed0bb | 531 | rec->u.end.sigval = GDB_SIGNAL_0; |
88d1aa9d | 532 | rec->u.end.insn_num = ++record_full_insn_count; |
d02ed0bb | 533 | |
88d1aa9d | 534 | record_full_arch_list_add (rec); |
d02ed0bb MM |
535 | |
536 | return 0; | |
537 | } | |
538 | ||
539 | static void | |
651ce16a | 540 | record_full_check_insn_num (void) |
d02ed0bb | 541 | { |
7ee70bf5 | 542 | if (record_full_insn_num == record_full_insn_max_num) |
d02ed0bb | 543 | { |
7ee70bf5 PA |
544 | /* Ask user what to do. */ |
545 | if (record_full_stop_at_limit) | |
d02ed0bb | 546 | { |
651ce16a | 547 | if (!yquery (_("Do you want to auto delete previous execution " |
7ee70bf5 | 548 | "log entries when record/replay buffer becomes " |
651ce16a | 549 | "full (record full stop-at-limit)?"))) |
7ee70bf5 | 550 | error (_("Process record: stopped by user.")); |
651ce16a | 551 | record_full_stop_at_limit = 0; |
d02ed0bb MM |
552 | } |
553 | } | |
554 | } | |
555 | ||
556 | static void | |
88d1aa9d | 557 | record_full_arch_list_cleanups (void *ignore) |
d02ed0bb | 558 | { |
88d1aa9d | 559 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
560 | } |
561 | ||
562 | /* Before inferior step (when GDB record the running message, inferior | |
563 | only can step), GDB will call this function to record the values to | |
88d1aa9d | 564 | record_full_list. This function will call gdbarch_process_record to |
d02ed0bb | 565 | record the running message of inferior and set them to |
88d1aa9d | 566 | record_full_arch_list, and add it to record_full_list. */ |
d02ed0bb | 567 | |
bf469271 | 568 | static void |
88d1aa9d | 569 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
570 | { |
571 | int ret; | |
ac7936df | 572 | struct gdbarch *gdbarch = regcache->arch (); |
88d1aa9d MM |
573 | struct cleanup *old_cleanups |
574 | = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb | 575 | |
88d1aa9d MM |
576 | record_full_arch_list_head = NULL; |
577 | record_full_arch_list_tail = NULL; | |
d02ed0bb | 578 | |
88d1aa9d | 579 | /* Check record_full_insn_num. */ |
651ce16a | 580 | record_full_check_insn_num (); |
d02ed0bb MM |
581 | |
582 | /* If gdb sends a signal value to target_resume, | |
583 | save it in the 'end' field of the previous instruction. | |
584 | ||
585 | Maybe process record should record what really happened, | |
586 | rather than what gdb pretends has happened. | |
587 | ||
588 | So if Linux delivered the signal to the child process during | |
589 | the record mode, we will record it and deliver it again in | |
590 | the replay mode. | |
591 | ||
592 | If user says "ignore this signal" during the record mode, then | |
593 | it will be ignored again during the replay mode (no matter if | |
594 | the user says something different, like "deliver this signal" | |
595 | during the replay mode). | |
596 | ||
597 | User should understand that nothing he does during the replay | |
598 | mode will change the behavior of the child. If he tries, | |
599 | then that is a user error. | |
600 | ||
601 | But we should still deliver the signal to gdb during the replay, | |
602 | if we delivered it during the recording. Therefore we should | |
88d1aa9d MM |
603 | record the signal during record_full_wait, not |
604 | record_full_resume. */ | |
605 | if (record_full_list != &record_full_first) /* FIXME better way to check */ | |
d02ed0bb | 606 | { |
88d1aa9d MM |
607 | gdb_assert (record_full_list->type == record_full_end); |
608 | record_full_list->u.end.sigval = signal; | |
d02ed0bb MM |
609 | } |
610 | ||
611 | if (signal == GDB_SIGNAL_0 | |
612 | || !gdbarch_process_record_signal_p (gdbarch)) | |
613 | ret = gdbarch_process_record (gdbarch, | |
614 | regcache, | |
615 | regcache_read_pc (regcache)); | |
616 | else | |
617 | ret = gdbarch_process_record_signal (gdbarch, | |
618 | regcache, | |
619 | signal); | |
620 | ||
621 | if (ret > 0) | |
622 | error (_("Process record: inferior program stopped.")); | |
623 | if (ret < 0) | |
624 | error (_("Process record: failed to record execution log.")); | |
625 | ||
626 | discard_cleanups (old_cleanups); | |
627 | ||
88d1aa9d MM |
628 | record_full_list->next = record_full_arch_list_head; |
629 | record_full_arch_list_head->prev = record_full_list; | |
630 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 631 | |
7ee70bf5 | 632 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 633 | record_full_list_release_first (); |
d02ed0bb | 634 | else |
88d1aa9d | 635 | record_full_insn_num++; |
d02ed0bb MM |
636 | } |
637 | ||
bf469271 | 638 | static bool |
88d1aa9d MM |
639 | record_full_message_wrapper_safe (struct regcache *regcache, |
640 | enum gdb_signal signal) | |
d02ed0bb | 641 | { |
bf469271 PA |
642 | TRY |
643 | { | |
644 | record_full_message (regcache, signal); | |
645 | } | |
646 | CATCH (ex, RETURN_MASK_ALL) | |
647 | { | |
648 | exception_print (gdb_stderr, ex); | |
649 | return false; | |
650 | } | |
651 | END_CATCH | |
d02ed0bb | 652 | |
bf469271 | 653 | return true; |
d02ed0bb MM |
654 | } |
655 | ||
88d1aa9d | 656 | /* Set to 1 if record_full_store_registers and record_full_xfer_partial |
d02ed0bb MM |
657 | doesn't need record. */ |
658 | ||
88d1aa9d | 659 | static int record_full_gdb_operation_disable = 0; |
d02ed0bb | 660 | |
07036511 | 661 | scoped_restore_tmpl<int> |
25ea693b | 662 | record_full_gdb_operation_disable_set (void) |
d02ed0bb | 663 | { |
07036511 | 664 | return make_scoped_restore (&record_full_gdb_operation_disable, 1); |
d02ed0bb MM |
665 | } |
666 | ||
667 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ | |
9e8915c6 PA |
668 | static enum target_stop_reason record_full_stop_reason |
669 | = TARGET_STOPPED_BY_NO_REASON; | |
d02ed0bb MM |
670 | |
671 | /* Execute one instruction from the record log. Each instruction in | |
672 | the log will be represented by an arbitrary sequence of register | |
673 | entries and memory entries, followed by an 'end' entry. */ | |
674 | ||
675 | static inline void | |
88d1aa9d MM |
676 | record_full_exec_insn (struct regcache *regcache, |
677 | struct gdbarch *gdbarch, | |
678 | struct record_full_entry *entry) | |
d02ed0bb MM |
679 | { |
680 | switch (entry->type) | |
681 | { | |
88d1aa9d | 682 | case record_full_reg: /* reg */ |
d02ed0bb | 683 | { |
d7dcbefc | 684 | gdb::byte_vector reg (entry->u.reg.len); |
d02ed0bb MM |
685 | |
686 | if (record_debug > 1) | |
687 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 688 | "Process record: record_full_reg %s to " |
d02ed0bb MM |
689 | "inferior num = %d.\n", |
690 | host_address_to_string (entry), | |
691 | entry->u.reg.num); | |
692 | ||
d7dcbefc | 693 | regcache_cooked_read (regcache, entry->u.reg.num, reg.data ()); |
d02ed0bb | 694 | regcache_cooked_write (regcache, entry->u.reg.num, |
88d1aa9d | 695 | record_full_get_loc (entry)); |
d7dcbefc | 696 | memcpy (record_full_get_loc (entry), reg.data (), entry->u.reg.len); |
d02ed0bb MM |
697 | } |
698 | break; | |
699 | ||
88d1aa9d | 700 | case record_full_mem: /* mem */ |
d02ed0bb MM |
701 | { |
702 | /* Nothing to do if the entry is flagged not_accessible. */ | |
703 | if (!entry->u.mem.mem_entry_not_accessible) | |
704 | { | |
394816ee MK |
705 | gdb_byte *mem = (gdb_byte *) xmalloc (entry->u.mem.len); |
706 | struct cleanup *cleanup = make_cleanup (xfree, mem); | |
d02ed0bb MM |
707 | |
708 | if (record_debug > 1) | |
709 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 710 | "Process record: record_full_mem %s to " |
d02ed0bb MM |
711 | "inferior addr = %s len = %d.\n", |
712 | host_address_to_string (entry), | |
713 | paddress (gdbarch, entry->u.mem.addr), | |
714 | entry->u.mem.len); | |
715 | ||
716 | if (record_read_memory (gdbarch, | |
717 | entry->u.mem.addr, mem, entry->u.mem.len)) | |
718 | entry->u.mem.mem_entry_not_accessible = 1; | |
719 | else | |
720 | { | |
721 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 722 | record_full_get_loc (entry), |
d02ed0bb MM |
723 | entry->u.mem.len)) |
724 | { | |
725 | entry->u.mem.mem_entry_not_accessible = 1; | |
726 | if (record_debug) | |
727 | warning (_("Process record: error writing memory at " | |
728 | "addr = %s len = %d."), | |
729 | paddress (gdbarch, entry->u.mem.addr), | |
730 | entry->u.mem.len); | |
731 | } | |
732 | else | |
733 | { | |
88d1aa9d MM |
734 | memcpy (record_full_get_loc (entry), mem, |
735 | entry->u.mem.len); | |
d02ed0bb MM |
736 | |
737 | /* We've changed memory --- check if a hardware | |
738 | watchpoint should trap. Note that this | |
739 | presently assumes the target beneath supports | |
740 | continuable watchpoints. On non-continuable | |
741 | watchpoints target, we'll want to check this | |
742 | _before_ actually doing the memory change, and | |
743 | not doing the change at all if the watchpoint | |
744 | traps. */ | |
745 | if (hardware_watchpoint_inserted_in_range | |
a01bda52 | 746 | (regcache->aspace (), |
d02ed0bb | 747 | entry->u.mem.addr, entry->u.mem.len)) |
9e8915c6 | 748 | record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb MM |
749 | } |
750 | } | |
394816ee MK |
751 | |
752 | do_cleanups (cleanup); | |
d02ed0bb MM |
753 | } |
754 | } | |
755 | break; | |
756 | } | |
757 | } | |
758 | ||
88d1aa9d | 759 | static void record_full_restore (void); |
d02ed0bb MM |
760 | |
761 | /* Asynchronous signal handle registered as event loop source for when | |
762 | we have pending events ready to be passed to the core. */ | |
763 | ||
88d1aa9d | 764 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
765 | |
766 | static void | |
88d1aa9d | 767 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb MM |
768 | { |
769 | inferior_event_handler (INF_REG_EVENT, NULL); | |
770 | } | |
771 | ||
772 | /* Open the process record target. */ | |
773 | ||
774 | static void | |
014f9477 | 775 | record_full_core_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
776 | { |
777 | struct regcache *regcache = get_current_regcache (); | |
ac7936df | 778 | int regnum = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
779 | int i; |
780 | ||
88d1aa9d | 781 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 782 | target_fetch_registers (regcache, -1); |
224c3ddb | 783 | record_full_core_regbuf = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE * regnum); |
d02ed0bb MM |
784 | for (i = 0; i < regnum; i ++) |
785 | regcache_raw_collect (regcache, i, | |
88d1aa9d | 786 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb | 787 | |
88d1aa9d MM |
788 | /* Get record_full_core_start and record_full_core_end. */ |
789 | if (build_section_table (core_bfd, &record_full_core_start, | |
790 | &record_full_core_end)) | |
d02ed0bb | 791 | { |
88d1aa9d MM |
792 | xfree (record_full_core_regbuf); |
793 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
794 | error (_("\"%s\": Can't find sections: %s"), |
795 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
796 | } | |
797 | ||
88d1aa9d MM |
798 | push_target (&record_full_core_ops); |
799 | record_full_restore (); | |
d02ed0bb MM |
800 | } |
801 | ||
802 | /* "to_open" target method for 'live' processes. */ | |
803 | ||
804 | static void | |
014f9477 | 805 | record_full_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
806 | { |
807 | if (record_debug) | |
0a0640e3 | 808 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open_1\n"); |
d02ed0bb MM |
809 | |
810 | /* check exec */ | |
811 | if (!target_has_execution) | |
812 | error (_("Process record: the program is not being run.")); | |
813 | if (non_stop) | |
814 | error (_("Process record target can't debug inferior in non-stop mode " | |
815 | "(non-stop).")); | |
816 | ||
817 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
818 | error (_("Process record: the current architecture doesn't support " | |
819 | "record function.")); | |
820 | ||
88d1aa9d | 821 | push_target (&record_full_ops); |
d02ed0bb MM |
822 | } |
823 | ||
88d1aa9d | 824 | static void record_full_init_record_breakpoints (void); |
d02ed0bb MM |
825 | |
826 | /* "to_open" target method. Open the process record target. */ | |
827 | ||
828 | static void | |
014f9477 | 829 | record_full_open (const char *name, int from_tty) |
d02ed0bb | 830 | { |
d02ed0bb | 831 | if (record_debug) |
88d1aa9d | 832 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 833 | |
8213266a | 834 | record_preopen (); |
d02ed0bb | 835 | |
d02ed0bb | 836 | /* Reset */ |
88d1aa9d MM |
837 | record_full_insn_num = 0; |
838 | record_full_insn_count = 0; | |
839 | record_full_list = &record_full_first; | |
840 | record_full_list->next = NULL; | |
d02ed0bb | 841 | |
d02ed0bb | 842 | if (core_bfd) |
88d1aa9d | 843 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 844 | else |
88d1aa9d | 845 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
846 | |
847 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
848 | record_full_async_inferior_event_token |
849 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
d02ed0bb MM |
850 | NULL); |
851 | ||
88d1aa9d | 852 | record_full_init_record_breakpoints (); |
d02ed0bb | 853 | |
38b022b4 | 854 | observer_notify_record_changed (current_inferior (), 1, "full", NULL); |
d02ed0bb MM |
855 | } |
856 | ||
857 | /* "to_close" target method. Close the process record target. */ | |
858 | ||
859 | static void | |
de90e03d | 860 | record_full_close (struct target_ops *self) |
d02ed0bb | 861 | { |
88d1aa9d | 862 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
863 | |
864 | if (record_debug) | |
88d1aa9d | 865 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 866 | |
88d1aa9d | 867 | record_full_list_release (record_full_list); |
d02ed0bb | 868 | |
88d1aa9d MM |
869 | /* Release record_full_core_regbuf. */ |
870 | if (record_full_core_regbuf) | |
d02ed0bb | 871 | { |
88d1aa9d MM |
872 | xfree (record_full_core_regbuf); |
873 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
874 | } |
875 | ||
88d1aa9d MM |
876 | /* Release record_full_core_buf_list. */ |
877 | if (record_full_core_buf_list) | |
d02ed0bb | 878 | { |
88d1aa9d MM |
879 | for (entry = record_full_core_buf_list->prev; entry; |
880 | entry = entry->prev) | |
d02ed0bb | 881 | { |
88d1aa9d MM |
882 | xfree (record_full_core_buf_list); |
883 | record_full_core_buf_list = entry; | |
d02ed0bb | 884 | } |
88d1aa9d | 885 | record_full_core_buf_list = NULL; |
d02ed0bb MM |
886 | } |
887 | ||
88d1aa9d MM |
888 | if (record_full_async_inferior_event_token) |
889 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
890 | } |
891 | ||
b7d2e916 PA |
892 | /* "to_async" target method. */ |
893 | ||
894 | static void | |
6a3753b3 | 895 | record_full_async (struct target_ops *ops, int enable) |
b7d2e916 | 896 | { |
6a3753b3 | 897 | if (enable) |
b7d2e916 PA |
898 | mark_async_event_handler (record_full_async_inferior_event_token); |
899 | else | |
900 | clear_async_event_handler (record_full_async_inferior_event_token); | |
901 | ||
6a3753b3 | 902 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
903 | } |
904 | ||
88d1aa9d | 905 | static int record_full_resume_step = 0; |
d02ed0bb | 906 | |
88d1aa9d MM |
907 | /* True if we've been resumed, and so each record_full_wait call should |
908 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 909 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 910 | static int record_full_resumed = 0; |
d02ed0bb MM |
911 | |
912 | /* The execution direction of the last resume we got. This is | |
913 | necessary for async mode. Vis (order is not strictly accurate): | |
914 | ||
915 | 1. user has the global execution direction set to forward | |
916 | 2. user does a reverse-step command | |
88d1aa9d | 917 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
918 | temporarily switched to reverse |
919 | 4. GDB's execution direction is reverted back to forward | |
920 | 5. target record notifies event loop there's an event to handle | |
921 | 6. infrun asks the target which direction was it going, and switches | |
922 | the global execution direction accordingly (to reverse) | |
923 | 7. infrun polls an event out of the record target, and handles it | |
924 | 8. GDB goes back to the event loop, and goto #4. | |
925 | */ | |
88d1aa9d | 926 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb MM |
927 | |
928 | /* "to_resume" target method. Resume the process record target. */ | |
929 | ||
930 | static void | |
88d1aa9d MM |
931 | record_full_resume (struct target_ops *ops, ptid_t ptid, int step, |
932 | enum gdb_signal signal) | |
d02ed0bb | 933 | { |
88d1aa9d MM |
934 | record_full_resume_step = step; |
935 | record_full_resumed = 1; | |
936 | record_full_execution_dir = execution_direction; | |
d02ed0bb | 937 | |
88d1aa9d | 938 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
939 | { |
940 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
941 | ||
88d1aa9d | 942 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
943 | |
944 | if (!step) | |
945 | { | |
946 | /* This is not hard single step. */ | |
947 | if (!gdbarch_software_single_step_p (gdbarch)) | |
948 | { | |
949 | /* This is a normal continue. */ | |
950 | step = 1; | |
951 | } | |
952 | else | |
953 | { | |
8ce9efb0 | 954 | /* This arch supports soft single step. */ |
34b7e8a6 | 955 | if (thread_has_single_step_breakpoints_set (inferior_thread ())) |
d02ed0bb MM |
956 | { |
957 | /* This is a soft single step. */ | |
88d1aa9d | 958 | record_full_resume_step = 1; |
d02ed0bb MM |
959 | } |
960 | else | |
93f9a11f | 961 | step = !insert_single_step_breakpoints (gdbarch); |
d02ed0bb MM |
962 | } |
963 | } | |
964 | ||
965 | /* Make sure the target beneath reports all signals. */ | |
966 | target_pass_signals (0, NULL); | |
967 | ||
6b84065d | 968 | ops->beneath->to_resume (ops->beneath, ptid, step, signal); |
d02ed0bb MM |
969 | } |
970 | ||
971 | /* We are about to start executing the inferior (or simulate it), | |
972 | let's register it with the event loop. */ | |
973 | if (target_can_async_p ()) | |
6a3753b3 | 974 | target_async (1); |
d02ed0bb MM |
975 | } |
976 | ||
85ad3aaf PA |
977 | /* "to_commit_resume" method for process record target. */ |
978 | ||
979 | static void | |
980 | record_full_commit_resume (struct target_ops *ops) | |
981 | { | |
982 | if (!RECORD_FULL_IS_REPLAY) | |
983 | ops->beneath->to_commit_resume (ops->beneath); | |
984 | } | |
985 | ||
88d1aa9d | 986 | static int record_full_get_sig = 0; |
d02ed0bb MM |
987 | |
988 | /* SIGINT signal handler, registered by "to_wait" method. */ | |
989 | ||
990 | static void | |
88d1aa9d | 991 | record_full_sig_handler (int signo) |
d02ed0bb MM |
992 | { |
993 | if (record_debug) | |
994 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
995 | ||
996 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 997 | record_full_resume_step = 1; |
d02ed0bb | 998 | |
88d1aa9d | 999 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1000 | SIGINT. */ |
88d1aa9d | 1001 | record_full_get_sig = 1; |
d02ed0bb MM |
1002 | } |
1003 | ||
1004 | static void | |
88d1aa9d | 1005 | record_full_wait_cleanups (void *ignore) |
d02ed0bb MM |
1006 | { |
1007 | if (execution_direction == EXEC_REVERSE) | |
1008 | { | |
88d1aa9d MM |
1009 | if (record_full_list->next) |
1010 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1011 | } |
1012 | else | |
88d1aa9d | 1013 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
1014 | } |
1015 | ||
1016 | /* "to_wait" target method for process record target. | |
1017 | ||
1018 | In record mode, the target is always run in singlestep mode | |
1019 | (even when gdb says to continue). The to_wait method intercepts | |
1020 | the stop events and determines which ones are to be passed on to | |
1021 | gdb. Most stop events are just singlestep events that gdb is not | |
1022 | to know about, so the to_wait method just records them and keeps | |
1023 | singlestepping. | |
1024 | ||
1025 | In replay mode, this function emulates the recorded execution log, | |
1026 | one instruction at a time (forward or backward), and determines | |
1027 | where to stop. */ | |
1028 | ||
1029 | static ptid_t | |
88d1aa9d MM |
1030 | record_full_wait_1 (struct target_ops *ops, |
1031 | ptid_t ptid, struct target_waitstatus *status, | |
1032 | int options) | |
d02ed0bb | 1033 | { |
07036511 TT |
1034 | scoped_restore restore_operation_disable |
1035 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
1036 | |
1037 | if (record_debug) | |
1038 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1039 | "Process record: record_full_wait " |
1040 | "record_full_resume_step = %d, " | |
1041 | "record_full_resumed = %d, direction=%s\n", | |
1042 | record_full_resume_step, record_full_resumed, | |
1043 | record_full_execution_dir == EXEC_FORWARD | |
1044 | ? "forward" : "reverse"); | |
1045 | ||
1046 | if (!record_full_resumed) | |
d02ed0bb MM |
1047 | { |
1048 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1049 | ||
1050 | /* No interesting event. */ | |
1051 | status->kind = TARGET_WAITKIND_IGNORE; | |
1052 | return minus_one_ptid; | |
1053 | } | |
1054 | ||
88d1aa9d MM |
1055 | record_full_get_sig = 0; |
1056 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1057 | |
9e8915c6 PA |
1058 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1059 | ||
88d1aa9d | 1060 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1061 | { |
88d1aa9d | 1062 | if (record_full_resume_step) |
d02ed0bb MM |
1063 | { |
1064 | /* This is a single step. */ | |
6b84065d | 1065 | return ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1066 | } |
1067 | else | |
1068 | { | |
1069 | /* This is not a single step. */ | |
1070 | ptid_t ret; | |
1071 | CORE_ADDR tmp_pc; | |
1072 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); | |
1073 | ||
1074 | while (1) | |
1075 | { | |
34b7e8a6 PA |
1076 | struct thread_info *tp; |
1077 | ||
6b84065d | 1078 | ret = ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1079 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1080 | { | |
1081 | if (record_debug) | |
1082 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1083 | "Process record: record_full_wait " |
d02ed0bb MM |
1084 | "target beneath not done yet\n"); |
1085 | return ret; | |
1086 | } | |
1087 | ||
34b7e8a6 PA |
1088 | ALL_NON_EXITED_THREADS (tp) |
1089 | delete_single_step_breakpoints (tp); | |
d02ed0bb | 1090 | |
88d1aa9d | 1091 | if (record_full_resume_step) |
d02ed0bb MM |
1092 | return ret; |
1093 | ||
1094 | /* Is this a SIGTRAP? */ | |
1095 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1096 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1097 | { | |
1098 | struct regcache *regcache; | |
9e8915c6 PA |
1099 | enum target_stop_reason *stop_reason_p |
1100 | = &record_full_stop_reason; | |
d02ed0bb MM |
1101 | |
1102 | /* Yes -- this is likely our single-step finishing, | |
1103 | but check if there's any reason the core would be | |
1104 | interested in the event. */ | |
1105 | ||
1106 | registers_changed (); | |
1107 | regcache = get_current_regcache (); | |
1108 | tmp_pc = regcache_read_pc (regcache); | |
8b86c959 | 1109 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb MM |
1110 | |
1111 | if (target_stopped_by_watchpoint ()) | |
1112 | { | |
1113 | /* Always interested in watchpoints. */ | |
1114 | } | |
9e8915c6 PA |
1115 | else if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1116 | stop_reason_p)) | |
d02ed0bb MM |
1117 | { |
1118 | /* There is a breakpoint here. Let the core | |
1119 | handle it. */ | |
d02ed0bb MM |
1120 | } |
1121 | else | |
1122 | { | |
1123 | /* This is a single-step trap. Record the | |
1124 | insn and issue another step. | |
1125 | FIXME: this part can be a random SIGTRAP too. | |
1126 | But GDB cannot handle it. */ | |
1127 | int step = 1; | |
1128 | ||
88d1aa9d MM |
1129 | if (!record_full_message_wrapper_safe (regcache, |
1130 | GDB_SIGNAL_0)) | |
d02ed0bb MM |
1131 | { |
1132 | status->kind = TARGET_WAITKIND_STOPPED; | |
1133 | status->value.sig = GDB_SIGNAL_0; | |
1134 | break; | |
1135 | } | |
1136 | ||
1137 | if (gdbarch_software_single_step_p (gdbarch)) | |
1138 | { | |
1139 | /* Try to insert the software single step breakpoint. | |
1140 | If insert success, set step to 0. */ | |
1141 | set_executing (inferior_ptid, 0); | |
1142 | reinit_frame_cache (); | |
93f9a11f YQ |
1143 | |
1144 | step = !insert_single_step_breakpoints (gdbarch); | |
1145 | ||
d02ed0bb MM |
1146 | set_executing (inferior_ptid, 1); |
1147 | } | |
1148 | ||
1149 | if (record_debug) | |
1150 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1151 | "Process record: record_full_wait " |
1152 | "issuing one more step in the " | |
1153 | "target beneath\n"); | |
6b84065d TT |
1154 | ops->beneath->to_resume (ops->beneath, ptid, step, |
1155 | GDB_SIGNAL_0); | |
85ad3aaf | 1156 | ops->beneath->to_commit_resume (ops->beneath); |
d02ed0bb MM |
1157 | continue; |
1158 | } | |
1159 | } | |
1160 | ||
1161 | /* The inferior is broken by a breakpoint or a signal. */ | |
1162 | break; | |
1163 | } | |
1164 | ||
1165 | return ret; | |
1166 | } | |
1167 | } | |
1168 | else | |
1169 | { | |
1170 | struct regcache *regcache = get_current_regcache (); | |
ac7936df | 1171 | struct gdbarch *gdbarch = regcache->arch (); |
8b86c959 | 1172 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb | 1173 | int continue_flag = 1; |
88d1aa9d MM |
1174 | int first_record_full_end = 1; |
1175 | struct cleanup *old_cleanups | |
1176 | = make_cleanup (record_full_wait_cleanups, 0); | |
d02ed0bb MM |
1177 | CORE_ADDR tmp_pc; |
1178 | ||
9e8915c6 | 1179 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
d02ed0bb MM |
1180 | status->kind = TARGET_WAITKIND_STOPPED; |
1181 | ||
1182 | /* Check breakpoint when forward execute. */ | |
1183 | if (execution_direction == EXEC_FORWARD) | |
1184 | { | |
1185 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1186 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1187 | &record_full_stop_reason)) | |
d02ed0bb | 1188 | { |
d02ed0bb MM |
1189 | if (record_debug) |
1190 | fprintf_unfiltered (gdb_stdlog, | |
1191 | "Process record: break at %s.\n", | |
1192 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb MM |
1193 | goto replay_out; |
1194 | } | |
1195 | } | |
1196 | ||
1197 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
1198 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1199 | mode, because inferior will not executed. | |
1200 | Then set it to terminal_ours to make GDB get the signal. */ | |
223ffa71 | 1201 | target_terminal::ours (); |
d02ed0bb | 1202 | |
88d1aa9d | 1203 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev |
d02ed0bb | 1204 | instruction. */ |
88d1aa9d MM |
1205 | if (execution_direction == EXEC_FORWARD && record_full_list->next) |
1206 | record_full_list = record_full_list->next; | |
d02ed0bb | 1207 | |
88d1aa9d | 1208 | /* Loop over the record_full_list, looking for the next place to |
d02ed0bb MM |
1209 | stop. */ |
1210 | do | |
1211 | { | |
1212 | /* Check for beginning and end of log. */ | |
1213 | if (execution_direction == EXEC_REVERSE | |
88d1aa9d | 1214 | && record_full_list == &record_full_first) |
d02ed0bb MM |
1215 | { |
1216 | /* Hit beginning of record log in reverse. */ | |
1217 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1218 | break; | |
1219 | } | |
88d1aa9d | 1220 | if (execution_direction != EXEC_REVERSE && !record_full_list->next) |
d02ed0bb MM |
1221 | { |
1222 | /* Hit end of record log going forward. */ | |
1223 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1224 | break; | |
1225 | } | |
1226 | ||
88d1aa9d | 1227 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 1228 | |
88d1aa9d | 1229 | if (record_full_list->type == record_full_end) |
d02ed0bb MM |
1230 | { |
1231 | if (record_debug > 1) | |
1232 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1233 | "Process record: record_full_end %s to " |
d02ed0bb | 1234 | "inferior.\n", |
88d1aa9d | 1235 | host_address_to_string (record_full_list)); |
d02ed0bb | 1236 | |
88d1aa9d | 1237 | if (first_record_full_end && execution_direction == EXEC_REVERSE) |
d02ed0bb | 1238 | { |
88d1aa9d MM |
1239 | /* When reverse excute, the first record_full_end is the |
1240 | part of current instruction. */ | |
1241 | first_record_full_end = 0; | |
d02ed0bb MM |
1242 | } |
1243 | else | |
1244 | { | |
88d1aa9d | 1245 | /* In EXEC_REVERSE mode, this is the record_full_end of prev |
d02ed0bb | 1246 | instruction. |
88d1aa9d MM |
1247 | In EXEC_FORWARD mode, this is the record_full_end of |
1248 | current instruction. */ | |
d02ed0bb | 1249 | /* step */ |
88d1aa9d | 1250 | if (record_full_resume_step) |
d02ed0bb MM |
1251 | { |
1252 | if (record_debug > 1) | |
1253 | fprintf_unfiltered (gdb_stdlog, | |
1254 | "Process record: step.\n"); | |
1255 | continue_flag = 0; | |
1256 | } | |
1257 | ||
1258 | /* check breakpoint */ | |
1259 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1260 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1261 | &record_full_stop_reason)) | |
d02ed0bb | 1262 | { |
d02ed0bb MM |
1263 | if (record_debug) |
1264 | fprintf_unfiltered (gdb_stdlog, | |
1265 | "Process record: break " | |
1266 | "at %s.\n", | |
1267 | paddress (gdbarch, tmp_pc)); | |
9e8915c6 | 1268 | |
d02ed0bb MM |
1269 | continue_flag = 0; |
1270 | } | |
1271 | ||
9e8915c6 | 1272 | if (record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT) |
d02ed0bb MM |
1273 | { |
1274 | if (record_debug) | |
1275 | fprintf_unfiltered (gdb_stdlog, | |
1276 | "Process record: hit hw " | |
1277 | "watchpoint.\n"); | |
1278 | continue_flag = 0; | |
1279 | } | |
1280 | /* Check target signal */ | |
88d1aa9d | 1281 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb MM |
1282 | /* FIXME: better way to check */ |
1283 | continue_flag = 0; | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | if (continue_flag) | |
1288 | { | |
1289 | if (execution_direction == EXEC_REVERSE) | |
1290 | { | |
88d1aa9d MM |
1291 | if (record_full_list->prev) |
1292 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
1293 | } |
1294 | else | |
1295 | { | |
88d1aa9d MM |
1296 | if (record_full_list->next) |
1297 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1298 | } |
1299 | } | |
1300 | } | |
1301 | while (continue_flag); | |
1302 | ||
1303 | replay_out: | |
88d1aa9d | 1304 | if (record_full_get_sig) |
d02ed0bb | 1305 | status->value.sig = GDB_SIGNAL_INT; |
88d1aa9d | 1306 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb | 1307 | /* FIXME: better way to check */ |
88d1aa9d | 1308 | status->value.sig = record_full_list->u.end.sigval; |
d02ed0bb MM |
1309 | else |
1310 | status->value.sig = GDB_SIGNAL_TRAP; | |
1311 | ||
1312 | discard_cleanups (old_cleanups); | |
1313 | } | |
1314 | ||
1315 | signal (SIGINT, handle_sigint); | |
1316 | ||
d02ed0bb MM |
1317 | return inferior_ptid; |
1318 | } | |
1319 | ||
1320 | static ptid_t | |
88d1aa9d MM |
1321 | record_full_wait (struct target_ops *ops, |
1322 | ptid_t ptid, struct target_waitstatus *status, | |
1323 | int options) | |
d02ed0bb MM |
1324 | { |
1325 | ptid_t return_ptid; | |
1326 | ||
88d1aa9d | 1327 | return_ptid = record_full_wait_1 (ops, ptid, status, options); |
d02ed0bb MM |
1328 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1329 | { | |
1330 | /* We're reporting a stop. Make sure any spurious | |
1331 | target_wait(WNOHANG) doesn't advance the target until the | |
1332 | core wants us resumed again. */ | |
88d1aa9d | 1333 | record_full_resumed = 0; |
d02ed0bb MM |
1334 | } |
1335 | return return_ptid; | |
1336 | } | |
1337 | ||
1338 | static int | |
6a109b6b | 1339 | record_full_stopped_by_watchpoint (struct target_ops *ops) |
d02ed0bb | 1340 | { |
88d1aa9d | 1341 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1342 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1343 | else |
6b84065d | 1344 | return ops->beneath->to_stopped_by_watchpoint (ops->beneath); |
d02ed0bb MM |
1345 | } |
1346 | ||
d02ed0bb | 1347 | static int |
88d1aa9d | 1348 | record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) |
d02ed0bb | 1349 | { |
88d1aa9d | 1350 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1351 | return 0; |
1352 | else | |
6b84065d | 1353 | return ops->beneath->to_stopped_data_address (ops->beneath, addr_p); |
d02ed0bb MM |
1354 | } |
1355 | ||
9e8915c6 PA |
1356 | /* The to_stopped_by_sw_breakpoint method of target record-full. */ |
1357 | ||
1358 | static int | |
1359 | record_full_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1360 | { | |
1361 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1362 | } | |
1363 | ||
1364 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1365 | record-full. */ | |
1366 | ||
1367 | static int | |
1368 | record_full_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1369 | { | |
1370 | return 1; | |
1371 | } | |
1372 | ||
1373 | /* The to_stopped_by_hw_breakpoint method of target record-full. */ | |
1374 | ||
1375 | static int | |
1376 | record_full_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1377 | { | |
1378 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
1379 | } | |
1380 | ||
1381 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1382 | record-full. */ | |
1383 | ||
1384 | static int | |
1385 | record_full_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1386 | { | |
1387 | return 1; | |
1388 | } | |
1389 | ||
d02ed0bb MM |
1390 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1391 | ||
1392 | static void | |
88d1aa9d | 1393 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1394 | { |
88d1aa9d | 1395 | /* Check record_full_insn_num. */ |
651ce16a | 1396 | record_full_check_insn_num (); |
d02ed0bb | 1397 | |
88d1aa9d MM |
1398 | record_full_arch_list_head = NULL; |
1399 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1400 | |
1401 | if (regnum < 0) | |
1402 | { | |
1403 | int i; | |
1404 | ||
ac7936df | 1405 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
d02ed0bb | 1406 | { |
25ea693b | 1407 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1408 | { |
88d1aa9d | 1409 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1410 | error (_("Process record: failed to record execution log.")); |
1411 | } | |
1412 | } | |
1413 | } | |
1414 | else | |
1415 | { | |
25ea693b | 1416 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1417 | { |
88d1aa9d | 1418 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1419 | error (_("Process record: failed to record execution log.")); |
1420 | } | |
1421 | } | |
25ea693b | 1422 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1423 | { |
88d1aa9d | 1424 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1425 | error (_("Process record: failed to record execution log.")); |
1426 | } | |
88d1aa9d MM |
1427 | record_full_list->next = record_full_arch_list_head; |
1428 | record_full_arch_list_head->prev = record_full_list; | |
1429 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1430 | |
7ee70bf5 | 1431 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1432 | record_full_list_release_first (); |
d02ed0bb | 1433 | else |
88d1aa9d | 1434 | record_full_insn_num++; |
d02ed0bb MM |
1435 | } |
1436 | ||
1437 | /* "to_store_registers" method for process record target. */ | |
1438 | ||
1439 | static void | |
88d1aa9d MM |
1440 | record_full_store_registers (struct target_ops *ops, |
1441 | struct regcache *regcache, | |
1442 | int regno) | |
d02ed0bb | 1443 | { |
88d1aa9d | 1444 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1445 | { |
88d1aa9d | 1446 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1447 | { |
1448 | int n; | |
1449 | ||
1450 | /* Let user choose if he wants to write register or not. */ | |
1451 | if (regno < 0) | |
1452 | n = | |
1453 | query (_("Because GDB is in replay mode, changing the " | |
1454 | "value of a register will make the execution " | |
1455 | "log unusable from this point onward. " | |
1456 | "Change all registers?")); | |
1457 | else | |
1458 | n = | |
1459 | query (_("Because GDB is in replay mode, changing the value " | |
1460 | "of a register will make the execution log unusable " | |
1461 | "from this point onward. Change register %s?"), | |
ac7936df | 1462 | gdbarch_register_name (regcache->arch (), |
d02ed0bb MM |
1463 | regno)); |
1464 | ||
1465 | if (!n) | |
1466 | { | |
1467 | /* Invalidate the value of regcache that was set in function | |
1468 | "regcache_raw_write". */ | |
1469 | if (regno < 0) | |
1470 | { | |
1471 | int i; | |
1472 | ||
1473 | for (i = 0; | |
ac7936df | 1474 | i < gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
1475 | i++) |
1476 | regcache_invalidate (regcache, i); | |
1477 | } | |
1478 | else | |
1479 | regcache_invalidate (regcache, regno); | |
1480 | ||
1481 | error (_("Process record canceled the operation.")); | |
1482 | } | |
1483 | ||
1484 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1485 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1486 | } |
1487 | ||
88d1aa9d | 1488 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1489 | } |
6b84065d | 1490 | ops->beneath->to_store_registers (ops->beneath, regcache, regno); |
d02ed0bb MM |
1491 | } |
1492 | ||
88d1aa9d MM |
1493 | /* "to_xfer_partial" method. Behavior is conditional on |
1494 | RECORD_FULL_IS_REPLAY. | |
d02ed0bb MM |
1495 | In replay mode, we cannot write memory unles we are willing to |
1496 | invalidate the record/replay log from this point forward. */ | |
1497 | ||
9b409511 | 1498 | static enum target_xfer_status |
88d1aa9d MM |
1499 | record_full_xfer_partial (struct target_ops *ops, enum target_object object, |
1500 | const char *annex, gdb_byte *readbuf, | |
1501 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1502 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb | 1503 | { |
88d1aa9d | 1504 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1505 | && (object == TARGET_OBJECT_MEMORY |
1506 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1507 | { | |
88d1aa9d | 1508 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1509 | { |
1510 | /* Let user choose if he wants to write memory or not. */ | |
1511 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
1512 | "will make the execution log unusable from this " | |
1513 | "point onward. Write memory at address %s?"), | |
1514 | paddress (target_gdbarch (), offset))) | |
1515 | error (_("Process record canceled the operation.")); | |
1516 | ||
1517 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1518 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1519 | } |
1520 | ||
88d1aa9d | 1521 | /* Check record_full_insn_num */ |
651ce16a | 1522 | record_full_check_insn_num (); |
d02ed0bb MM |
1523 | |
1524 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1525 | record_full_arch_list_head = NULL; |
1526 | record_full_arch_list_tail = NULL; | |
25ea693b | 1527 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1528 | { |
88d1aa9d | 1529 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1530 | if (record_debug) |
1531 | fprintf_unfiltered (gdb_stdlog, | |
1532 | "Process record: failed to record " | |
1533 | "execution log."); | |
2ed4b548 | 1534 | return TARGET_XFER_E_IO; |
d02ed0bb | 1535 | } |
25ea693b | 1536 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1537 | { |
88d1aa9d | 1538 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1539 | if (record_debug) |
1540 | fprintf_unfiltered (gdb_stdlog, | |
1541 | "Process record: failed to record " | |
1542 | "execution log."); | |
2ed4b548 | 1543 | return TARGET_XFER_E_IO; |
d02ed0bb | 1544 | } |
88d1aa9d MM |
1545 | record_full_list->next = record_full_arch_list_head; |
1546 | record_full_arch_list_head->prev = record_full_list; | |
1547 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1548 | |
7ee70bf5 | 1549 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1550 | record_full_list_release_first (); |
d02ed0bb | 1551 | else |
88d1aa9d | 1552 | record_full_insn_num++; |
d02ed0bb MM |
1553 | } |
1554 | ||
6b84065d TT |
1555 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
1556 | readbuf, writebuf, offset, | |
1557 | len, xfered_len); | |
d02ed0bb MM |
1558 | } |
1559 | ||
1560 | /* This structure represents a breakpoint inserted while the record | |
1561 | target is active. We use this to know when to install/remove | |
1562 | breakpoints in/from the target beneath. For example, a breakpoint | |
1563 | may be inserted while recording, but removed when not replaying nor | |
1564 | recording. In that case, the breakpoint had not been inserted on | |
1565 | the target beneath, so we should not try to remove it there. */ | |
1566 | ||
88d1aa9d | 1567 | struct record_full_breakpoint |
d02ed0bb MM |
1568 | { |
1569 | /* The address and address space the breakpoint was set at. */ | |
1570 | struct address_space *address_space; | |
1571 | CORE_ADDR addr; | |
1572 | ||
1573 | /* True when the breakpoint has been also installed in the target | |
1574 | beneath. This will be false for breakpoints set during replay or | |
1575 | when recording. */ | |
1576 | int in_target_beneath; | |
1577 | }; | |
1578 | ||
88d1aa9d MM |
1579 | typedef struct record_full_breakpoint *record_full_breakpoint_p; |
1580 | DEF_VEC_P(record_full_breakpoint_p); | |
d02ed0bb MM |
1581 | |
1582 | /* The list of breakpoints inserted while the record target is | |
1583 | active. */ | |
88d1aa9d | 1584 | VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL; |
d02ed0bb MM |
1585 | |
1586 | static void | |
88d1aa9d | 1587 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1588 | { |
1589 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1590 | return; | |
1591 | ||
1592 | if (loc->inserted) | |
1593 | { | |
88d1aa9d | 1594 | struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1595 | |
1596 | bp->addr = loc->target_info.placed_address; | |
1597 | bp->address_space = loc->target_info.placed_address_space; | |
1598 | ||
1599 | bp->in_target_beneath = 1; | |
1600 | ||
88d1aa9d | 1601 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1602 | } |
1603 | } | |
1604 | ||
88d1aa9d | 1605 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1606 | |
1607 | static void | |
88d1aa9d | 1608 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1609 | { |
88d1aa9d | 1610 | VEC_free (record_full_breakpoint_p, record_full_breakpoints); |
d02ed0bb | 1611 | |
88d1aa9d | 1612 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1613 | } |
1614 | ||
88d1aa9d | 1615 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1616 | insert or remove breakpoints in the real target when replaying, nor |
1617 | when recording. */ | |
1618 | ||
1619 | static int | |
3db08215 MM |
1620 | record_full_insert_breakpoint (struct target_ops *ops, |
1621 | struct gdbarch *gdbarch, | |
88d1aa9d | 1622 | struct bp_target_info *bp_tgt) |
d02ed0bb | 1623 | { |
88d1aa9d | 1624 | struct record_full_breakpoint *bp; |
d02ed0bb | 1625 | int in_target_beneath = 0; |
e390720b | 1626 | int ix; |
d02ed0bb | 1627 | |
88d1aa9d | 1628 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1629 | { |
1630 | /* When recording, we currently always single-step, so we don't | |
1631 | really need to install regular breakpoints in the inferior. | |
1632 | However, we do have to insert software single-step | |
1633 | breakpoints, in case the target can't hardware step. To keep | |
f99bd5f2 | 1634 | things simple, we always insert. */ |
d02ed0bb MM |
1635 | int ret; |
1636 | ||
07036511 TT |
1637 | scoped_restore restore_operation_disable |
1638 | = record_full_gdb_operation_disable_set (); | |
6b84065d | 1639 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
d02ed0bb MM |
1640 | |
1641 | if (ret != 0) | |
1642 | return ret; | |
1643 | ||
1644 | in_target_beneath = 1; | |
1645 | } | |
1646 | ||
e390720b YQ |
1647 | /* Use the existing entries if found in order to avoid duplication |
1648 | in record_full_breakpoints. */ | |
1649 | ||
1650 | for (ix = 0; | |
1651 | VEC_iterate (record_full_breakpoint_p, | |
1652 | record_full_breakpoints, ix, bp); | |
1653 | ++ix) | |
1654 | { | |
1655 | if (bp->addr == bp_tgt->placed_address | |
1656 | && bp->address_space == bp_tgt->placed_address_space) | |
1657 | { | |
1658 | gdb_assert (bp->in_target_beneath == in_target_beneath); | |
1659 | return 0; | |
1660 | } | |
1661 | } | |
1662 | ||
88d1aa9d | 1663 | bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1664 | bp->addr = bp_tgt->placed_address; |
1665 | bp->address_space = bp_tgt->placed_address_space; | |
1666 | bp->in_target_beneath = in_target_beneath; | |
88d1aa9d | 1667 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1668 | return 0; |
1669 | } | |
1670 | ||
1671 | /* "to_remove_breakpoint" method for process record target. */ | |
1672 | ||
1673 | static int | |
3db08215 MM |
1674 | record_full_remove_breakpoint (struct target_ops *ops, |
1675 | struct gdbarch *gdbarch, | |
73971819 PA |
1676 | struct bp_target_info *bp_tgt, |
1677 | enum remove_bp_reason reason) | |
d02ed0bb | 1678 | { |
88d1aa9d | 1679 | struct record_full_breakpoint *bp; |
d02ed0bb MM |
1680 | int ix; |
1681 | ||
1682 | for (ix = 0; | |
88d1aa9d MM |
1683 | VEC_iterate (record_full_breakpoint_p, |
1684 | record_full_breakpoints, ix, bp); | |
d02ed0bb MM |
1685 | ++ix) |
1686 | { | |
1687 | if (bp->addr == bp_tgt->placed_address | |
1688 | && bp->address_space == bp_tgt->placed_address_space) | |
1689 | { | |
1690 | if (bp->in_target_beneath) | |
1691 | { | |
d02ed0bb MM |
1692 | int ret; |
1693 | ||
07036511 TT |
1694 | scoped_restore restore_operation_disable |
1695 | = record_full_gdb_operation_disable_set (); | |
6b84065d | 1696 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, |
73971819 | 1697 | bp_tgt, reason); |
d02ed0bb MM |
1698 | if (ret != 0) |
1699 | return ret; | |
1700 | } | |
1701 | ||
01d3dedf PA |
1702 | if (reason == REMOVE_BREAKPOINT) |
1703 | { | |
1704 | VEC_unordered_remove (record_full_breakpoint_p, | |
1705 | record_full_breakpoints, ix); | |
1706 | } | |
d02ed0bb MM |
1707 | return 0; |
1708 | } | |
1709 | } | |
1710 | ||
1711 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1712 | } | |
1713 | ||
1714 | /* "to_can_execute_reverse" method for process record target. */ | |
1715 | ||
1716 | static int | |
19db3e69 | 1717 | record_full_can_execute_reverse (struct target_ops *self) |
d02ed0bb MM |
1718 | { |
1719 | return 1; | |
1720 | } | |
1721 | ||
1722 | /* "to_get_bookmark" method for process record and prec over core. */ | |
1723 | ||
1724 | static gdb_byte * | |
c2bcbb1d TT |
1725 | record_full_get_bookmark (struct target_ops *self, const char *args, |
1726 | int from_tty) | |
d02ed0bb | 1727 | { |
0f928d68 | 1728 | char *ret = NULL; |
d02ed0bb MM |
1729 | |
1730 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1731 | if (record_full_list && record_full_list->type == record_full_end) |
1732 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1733 | |
1734 | if (record_debug) | |
1735 | { | |
1736 | if (ret) | |
1737 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1738 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1739 | else |
1740 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1741 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1742 | } |
0f928d68 | 1743 | return (gdb_byte *) ret; |
d02ed0bb MM |
1744 | } |
1745 | ||
1746 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1747 | ||
1748 | static void | |
3c80fb48 | 1749 | record_full_goto_bookmark (struct target_ops *self, |
c2bcbb1d | 1750 | const gdb_byte *raw_bookmark, int from_tty) |
d02ed0bb | 1751 | { |
c2bcbb1d TT |
1752 | const char *bookmark = (const char *) raw_bookmark; |
1753 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); | |
0f928d68 | 1754 | |
d02ed0bb MM |
1755 | if (record_debug) |
1756 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1757 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb MM |
1758 | |
1759 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1760 | { | |
c2bcbb1d TT |
1761 | char *copy; |
1762 | ||
d02ed0bb MM |
1763 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) |
1764 | error (_("Unbalanced quotes: %s"), bookmark); | |
1765 | ||
c2bcbb1d TT |
1766 | |
1767 | copy = savestring (bookmark + 1, strlen (bookmark) - 2); | |
1768 | make_cleanup (xfree, copy); | |
1769 | bookmark = copy; | |
d02ed0bb MM |
1770 | } |
1771 | ||
c2bcbb1d TT |
1772 | record_goto (bookmark); |
1773 | ||
1774 | do_cleanups (cleanup); | |
d02ed0bb MM |
1775 | } |
1776 | ||
d02ed0bb | 1777 | static enum exec_direction_kind |
4c612759 | 1778 | record_full_execution_direction (struct target_ops *self) |
d02ed0bb | 1779 | { |
88d1aa9d | 1780 | return record_full_execution_dir; |
d02ed0bb MM |
1781 | } |
1782 | ||
b158a20f TW |
1783 | /* The to_record_method method of target record-full. */ |
1784 | ||
1785 | enum record_method | |
1786 | record_full_record_method (struct target_ops *self, ptid_t ptid) | |
1787 | { | |
1788 | return RECORD_METHOD_FULL; | |
1789 | } | |
1790 | ||
d02ed0bb | 1791 | static void |
630d6a4a | 1792 | record_full_info (struct target_ops *self) |
d02ed0bb | 1793 | { |
88d1aa9d | 1794 | struct record_full_entry *p; |
d02ed0bb | 1795 | |
88d1aa9d | 1796 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1797 | printf_filtered (_("Replay mode:\n")); |
1798 | else | |
1799 | printf_filtered (_("Record mode:\n")); | |
1800 | ||
1801 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1802 | for (p = record_full_first.next; |
1803 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1804 | p = p->next) |
1805 | ; | |
1806 | ||
1807 | /* Do we have a log at all? */ | |
88d1aa9d | 1808 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1809 | { |
1810 | /* Display instruction number for first instruction in the log. */ | |
1811 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1812 | pulongest (p->u.end.insn_num)); | |
1813 | ||
1814 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1815 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1816 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1817 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1818 | |
1819 | /* Display instruction number for last instruction in the log. */ | |
1820 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1821 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1822 | |
1823 | /* Display log count. */ | |
7ee70bf5 | 1824 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1825 | record_full_insn_num); |
d02ed0bb MM |
1826 | } |
1827 | else | |
1828 | printf_filtered (_("No instructions have been logged.\n")); | |
1829 | ||
1830 | /* Display max log size. */ | |
7ee70bf5 | 1831 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1832 | record_full_insn_max_num); |
d02ed0bb MM |
1833 | } |
1834 | ||
1835 | /* The "to_record_delete" target method. */ | |
1836 | ||
1837 | static void | |
d1b55219 | 1838 | record_full_delete (struct target_ops *self) |
d02ed0bb | 1839 | { |
88d1aa9d | 1840 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1841 | } |
1842 | ||
1843 | /* The "to_record_is_replaying" target method. */ | |
1844 | ||
1845 | static int | |
a52eab48 | 1846 | record_full_is_replaying (struct target_ops *self, ptid_t ptid) |
d02ed0bb | 1847 | { |
88d1aa9d | 1848 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1849 | } |
1850 | ||
7ff27e9b MM |
1851 | /* The "to_record_will_replay" target method. */ |
1852 | ||
1853 | static int | |
1854 | record_full_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1855 | { | |
1856 | /* We can currently only record when executing forwards. Should we be able | |
1857 | to record when executing backwards on targets that support reverse | |
1858 | execution, this needs to be changed. */ | |
1859 | ||
1860 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1861 | } | |
1862 | ||
d02ed0bb MM |
1863 | /* Go to a specific entry. */ |
1864 | ||
1865 | static void | |
88d1aa9d | 1866 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1867 | { |
1868 | if (p == NULL) | |
1869 | error (_("Target insn not found.")); | |
88d1aa9d | 1870 | else if (p == record_full_list) |
d02ed0bb | 1871 | error (_("Already at target insn.")); |
88d1aa9d | 1872 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1873 | { |
1874 | printf_filtered (_("Go forward to insn number %s\n"), | |
1875 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1876 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
1877 | } |
1878 | else | |
1879 | { | |
1880 | printf_filtered (_("Go backward to insn number %s\n"), | |
1881 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1882 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
1883 | } |
1884 | ||
1885 | registers_changed (); | |
1886 | reinit_frame_cache (); | |
485668e5 | 1887 | stop_pc = regcache_read_pc (get_current_regcache ()); |
08d72866 | 1888 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
1889 | } |
1890 | ||
1891 | /* The "to_goto_record_begin" target method. */ | |
1892 | ||
1893 | static void | |
08475817 | 1894 | record_full_goto_begin (struct target_ops *self) |
d02ed0bb | 1895 | { |
88d1aa9d | 1896 | struct record_full_entry *p = NULL; |
d02ed0bb | 1897 | |
88d1aa9d MM |
1898 | for (p = &record_full_first; p != NULL; p = p->next) |
1899 | if (p->type == record_full_end) | |
d02ed0bb MM |
1900 | break; |
1901 | ||
88d1aa9d | 1902 | record_full_goto_entry (p); |
d02ed0bb MM |
1903 | } |
1904 | ||
1905 | /* The "to_goto_record_end" target method. */ | |
1906 | ||
1907 | static void | |
307a1b91 | 1908 | record_full_goto_end (struct target_ops *self) |
d02ed0bb | 1909 | { |
88d1aa9d | 1910 | struct record_full_entry *p = NULL; |
d02ed0bb | 1911 | |
88d1aa9d | 1912 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
1913 | ; |
1914 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 1915 | if (p->type == record_full_end) |
d02ed0bb MM |
1916 | break; |
1917 | ||
88d1aa9d | 1918 | record_full_goto_entry (p); |
d02ed0bb MM |
1919 | } |
1920 | ||
1921 | /* The "to_goto_record" target method. */ | |
1922 | ||
1923 | static void | |
606183ac | 1924 | record_full_goto (struct target_ops *self, ULONGEST target_insn) |
d02ed0bb | 1925 | { |
88d1aa9d | 1926 | struct record_full_entry *p = NULL; |
d02ed0bb | 1927 | |
88d1aa9d MM |
1928 | for (p = &record_full_first; p != NULL; p = p->next) |
1929 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
1930 | break; |
1931 | ||
88d1aa9d | 1932 | record_full_goto_entry (p); |
d02ed0bb MM |
1933 | } |
1934 | ||
797094dd MM |
1935 | /* The "to_record_stop_replaying" target method. */ |
1936 | ||
1937 | static void | |
1938 | record_full_stop_replaying (struct target_ops *self) | |
1939 | { | |
1940 | record_full_goto_end (self); | |
1941 | } | |
1942 | ||
d02ed0bb | 1943 | static void |
88d1aa9d | 1944 | init_record_full_ops (void) |
d02ed0bb | 1945 | { |
88d1aa9d MM |
1946 | record_full_ops.to_shortname = "record-full"; |
1947 | record_full_ops.to_longname = "Process record and replay target"; | |
1948 | record_full_ops.to_doc = | |
d02ed0bb | 1949 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
1950 | record_full_ops.to_open = record_full_open; |
1951 | record_full_ops.to_close = record_full_close; | |
b7d2e916 | 1952 | record_full_ops.to_async = record_full_async; |
88d1aa9d | 1953 | record_full_ops.to_resume = record_full_resume; |
85ad3aaf | 1954 | record_full_ops.to_commit_resume = record_full_commit_resume; |
88d1aa9d | 1955 | record_full_ops.to_wait = record_full_wait; |
7c1687a9 MM |
1956 | record_full_ops.to_disconnect = record_disconnect; |
1957 | record_full_ops.to_detach = record_detach; | |
1958 | record_full_ops.to_mourn_inferior = record_mourn_inferior; | |
1959 | record_full_ops.to_kill = record_kill; | |
88d1aa9d MM |
1960 | record_full_ops.to_store_registers = record_full_store_registers; |
1961 | record_full_ops.to_xfer_partial = record_full_xfer_partial; | |
1962 | record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint; | |
1963 | record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint; | |
1964 | record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint; | |
1965 | record_full_ops.to_stopped_data_address = record_full_stopped_data_address; | |
9e8915c6 PA |
1966 | record_full_ops.to_stopped_by_sw_breakpoint |
1967 | = record_full_stopped_by_sw_breakpoint; | |
1968 | record_full_ops.to_supports_stopped_by_sw_breakpoint | |
1969 | = record_full_supports_stopped_by_sw_breakpoint; | |
1970 | record_full_ops.to_stopped_by_hw_breakpoint | |
1971 | = record_full_stopped_by_hw_breakpoint; | |
1972 | record_full_ops.to_supports_stopped_by_hw_breakpoint | |
1973 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
1974 | record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse; |
1975 | record_full_ops.to_stratum = record_stratum; | |
d02ed0bb | 1976 | /* Add bookmark target methods. */ |
88d1aa9d MM |
1977 | record_full_ops.to_get_bookmark = record_full_get_bookmark; |
1978 | record_full_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d | 1979 | record_full_ops.to_execution_direction = record_full_execution_direction; |
b158a20f | 1980 | record_full_ops.to_record_method = record_full_record_method; |
88d1aa9d MM |
1981 | record_full_ops.to_info_record = record_full_info; |
1982 | record_full_ops.to_save_record = record_full_save; | |
1983 | record_full_ops.to_delete_record = record_full_delete; | |
1984 | record_full_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 1985 | record_full_ops.to_record_will_replay = record_full_will_replay; |
797094dd | 1986 | record_full_ops.to_record_stop_replaying = record_full_stop_replaying; |
88d1aa9d MM |
1987 | record_full_ops.to_goto_record_begin = record_full_goto_begin; |
1988 | record_full_ops.to_goto_record_end = record_full_goto_end; | |
1989 | record_full_ops.to_goto_record = record_full_goto; | |
1990 | record_full_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
1991 | } |
1992 | ||
1993 | /* "to_resume" method for prec over corefile. */ | |
1994 | ||
1995 | static void | |
88d1aa9d MM |
1996 | record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step, |
1997 | enum gdb_signal signal) | |
d02ed0bb | 1998 | { |
88d1aa9d MM |
1999 | record_full_resume_step = step; |
2000 | record_full_resumed = 1; | |
2001 | record_full_execution_dir = execution_direction; | |
d02ed0bb MM |
2002 | |
2003 | /* We are about to start executing the inferior (or simulate it), | |
2004 | let's register it with the event loop. */ | |
2005 | if (target_can_async_p ()) | |
6a3753b3 | 2006 | target_async (1); |
d02ed0bb MM |
2007 | } |
2008 | ||
2009 | /* "to_kill" method for prec over corefile. */ | |
2010 | ||
2011 | static void | |
88d1aa9d | 2012 | record_full_core_kill (struct target_ops *ops) |
d02ed0bb MM |
2013 | { |
2014 | if (record_debug) | |
88d1aa9d | 2015 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2016 | |
88d1aa9d | 2017 | unpush_target (&record_full_core_ops); |
d02ed0bb MM |
2018 | } |
2019 | ||
2020 | /* "to_fetch_registers" method for prec over corefile. */ | |
2021 | ||
2022 | static void | |
88d1aa9d MM |
2023 | record_full_core_fetch_registers (struct target_ops *ops, |
2024 | struct regcache *regcache, | |
2025 | int regno) | |
d02ed0bb MM |
2026 | { |
2027 | if (regno < 0) | |
2028 | { | |
ac7936df | 2029 | int num = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
2030 | int i; |
2031 | ||
2032 | for (i = 0; i < num; i ++) | |
2033 | regcache_raw_supply (regcache, i, | |
88d1aa9d | 2034 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb MM |
2035 | } |
2036 | else | |
2037 | regcache_raw_supply (regcache, regno, | |
88d1aa9d | 2038 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2039 | } |
2040 | ||
2041 | /* "to_prepare_to_store" method for prec over corefile. */ | |
2042 | ||
2043 | static void | |
f32dbf8c MM |
2044 | record_full_core_prepare_to_store (struct target_ops *self, |
2045 | struct regcache *regcache) | |
d02ed0bb MM |
2046 | { |
2047 | } | |
2048 | ||
2049 | /* "to_store_registers" method for prec over corefile. */ | |
2050 | ||
2051 | static void | |
88d1aa9d | 2052 | record_full_core_store_registers (struct target_ops *ops, |
d02ed0bb MM |
2053 | struct regcache *regcache, |
2054 | int regno) | |
2055 | { | |
88d1aa9d | 2056 | if (record_full_gdb_operation_disable) |
d02ed0bb | 2057 | regcache_raw_collect (regcache, regno, |
88d1aa9d | 2058 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2059 | else |
2060 | error (_("You can't do that without a process to debug.")); | |
2061 | } | |
2062 | ||
2063 | /* "to_xfer_partial" method for prec over corefile. */ | |
2064 | ||
9b409511 | 2065 | static enum target_xfer_status |
88d1aa9d MM |
2066 | record_full_core_xfer_partial (struct target_ops *ops, |
2067 | enum target_object object, | |
2068 | const char *annex, gdb_byte *readbuf, | |
2069 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 2070 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb MM |
2071 | { |
2072 | if (object == TARGET_OBJECT_MEMORY) | |
2073 | { | |
88d1aa9d | 2074 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb MM |
2075 | { |
2076 | struct target_section *p; | |
2077 | ||
88d1aa9d | 2078 | for (p = record_full_core_start; p < record_full_core_end; p++) |
d02ed0bb MM |
2079 | { |
2080 | if (offset >= p->addr) | |
2081 | { | |
88d1aa9d | 2082 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2083 | ULONGEST sec_offset; |
2084 | ||
2085 | if (offset >= p->endaddr) | |
2086 | continue; | |
2087 | ||
2088 | if (offset + len > p->endaddr) | |
2089 | len = p->endaddr - offset; | |
2090 | ||
2091 | sec_offset = offset - p->addr; | |
2092 | ||
2093 | /* Read readbuf or write writebuf p, offset, len. */ | |
2094 | /* Check flags. */ | |
2095 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2096 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2097 | { | |
2098 | if (readbuf) | |
2099 | memset (readbuf, 0, len); | |
9b409511 YQ |
2100 | |
2101 | *xfered_len = len; | |
2102 | return TARGET_XFER_OK; | |
d02ed0bb | 2103 | } |
88d1aa9d MM |
2104 | /* Get record_full_core_buf_entry. */ |
2105 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb MM |
2106 | entry = entry->prev) |
2107 | if (entry->p == p) | |
2108 | break; | |
2109 | if (writebuf) | |
2110 | { | |
2111 | if (!entry) | |
2112 | { | |
2113 | /* Add a new entry. */ | |
8d749320 | 2114 | entry = XNEW (struct record_full_core_buf_entry); |
d02ed0bb | 2115 | entry->p = p; |
2b2848e2 DE |
2116 | if (!bfd_malloc_and_get_section |
2117 | (p->the_bfd_section->owner, | |
2118 | p->the_bfd_section, | |
2119 | &entry->buf)) | |
d02ed0bb MM |
2120 | { |
2121 | xfree (entry); | |
9b409511 | 2122 | return TARGET_XFER_EOF; |
d02ed0bb | 2123 | } |
88d1aa9d MM |
2124 | entry->prev = record_full_core_buf_list; |
2125 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2126 | } |
2127 | ||
2128 | memcpy (entry->buf + sec_offset, writebuf, | |
2129 | (size_t) len); | |
2130 | } | |
2131 | else | |
2132 | { | |
2133 | if (!entry) | |
6b84065d TT |
2134 | return ops->beneath->to_xfer_partial (ops->beneath, |
2135 | object, annex, | |
2136 | readbuf, writebuf, | |
2137 | offset, len, | |
2138 | xfered_len); | |
d02ed0bb MM |
2139 | |
2140 | memcpy (readbuf, entry->buf + sec_offset, | |
2141 | (size_t) len); | |
2142 | } | |
2143 | ||
9b409511 YQ |
2144 | *xfered_len = len; |
2145 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2146 | } |
2147 | } | |
2148 | ||
2ed4b548 | 2149 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2150 | } |
2151 | else | |
2152 | error (_("You can't do that without a process to debug.")); | |
2153 | } | |
2154 | ||
6b84065d TT |
2155 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2156 | readbuf, writebuf, offset, len, | |
2157 | xfered_len); | |
d02ed0bb MM |
2158 | } |
2159 | ||
2160 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2161 | ||
2162 | static int | |
3db08215 MM |
2163 | record_full_core_insert_breakpoint (struct target_ops *ops, |
2164 | struct gdbarch *gdbarch, | |
88d1aa9d | 2165 | struct bp_target_info *bp_tgt) |
d02ed0bb MM |
2166 | { |
2167 | return 0; | |
2168 | } | |
2169 | ||
2170 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2171 | ||
2172 | static int | |
3db08215 MM |
2173 | record_full_core_remove_breakpoint (struct target_ops *ops, |
2174 | struct gdbarch *gdbarch, | |
73971819 PA |
2175 | struct bp_target_info *bp_tgt, |
2176 | enum remove_bp_reason reason) | |
d02ed0bb MM |
2177 | { |
2178 | return 0; | |
2179 | } | |
2180 | ||
2181 | /* "to_has_execution" method for prec over corefile. */ | |
2182 | ||
2183 | static int | |
88d1aa9d | 2184 | record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid) |
d02ed0bb MM |
2185 | { |
2186 | return 1; | |
2187 | } | |
2188 | ||
2189 | static void | |
88d1aa9d | 2190 | init_record_full_core_ops (void) |
d02ed0bb | 2191 | { |
88d1aa9d MM |
2192 | record_full_core_ops.to_shortname = "record-core"; |
2193 | record_full_core_ops.to_longname = "Process record and replay target"; | |
2194 | record_full_core_ops.to_doc = | |
d02ed0bb | 2195 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
2196 | record_full_core_ops.to_open = record_full_open; |
2197 | record_full_core_ops.to_close = record_full_close; | |
b7d2e916 | 2198 | record_full_core_ops.to_async = record_full_async; |
88d1aa9d MM |
2199 | record_full_core_ops.to_resume = record_full_core_resume; |
2200 | record_full_core_ops.to_wait = record_full_wait; | |
2201 | record_full_core_ops.to_kill = record_full_core_kill; | |
2202 | record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers; | |
2203 | record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store; | |
2204 | record_full_core_ops.to_store_registers = record_full_core_store_registers; | |
2205 | record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial; | |
2206 | record_full_core_ops.to_insert_breakpoint | |
2207 | = record_full_core_insert_breakpoint; | |
2208 | record_full_core_ops.to_remove_breakpoint | |
2209 | = record_full_core_remove_breakpoint; | |
2210 | record_full_core_ops.to_stopped_by_watchpoint | |
2211 | = record_full_stopped_by_watchpoint; | |
2212 | record_full_core_ops.to_stopped_data_address | |
2213 | = record_full_stopped_data_address; | |
9e8915c6 PA |
2214 | record_full_core_ops.to_stopped_by_sw_breakpoint |
2215 | = record_full_stopped_by_sw_breakpoint; | |
2216 | record_full_core_ops.to_supports_stopped_by_sw_breakpoint | |
2217 | = record_full_supports_stopped_by_sw_breakpoint; | |
2218 | record_full_core_ops.to_stopped_by_hw_breakpoint | |
2219 | = record_full_stopped_by_hw_breakpoint; | |
2220 | record_full_core_ops.to_supports_stopped_by_hw_breakpoint | |
2221 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
2222 | record_full_core_ops.to_can_execute_reverse |
2223 | = record_full_can_execute_reverse; | |
2224 | record_full_core_ops.to_has_execution = record_full_core_has_execution; | |
2225 | record_full_core_ops.to_stratum = record_stratum; | |
d02ed0bb | 2226 | /* Add bookmark target methods. */ |
88d1aa9d MM |
2227 | record_full_core_ops.to_get_bookmark = record_full_get_bookmark; |
2228 | record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
2229 | record_full_core_ops.to_execution_direction |
2230 | = record_full_execution_direction; | |
b158a20f | 2231 | record_full_core_ops.to_record_method = record_full_record_method; |
88d1aa9d MM |
2232 | record_full_core_ops.to_info_record = record_full_info; |
2233 | record_full_core_ops.to_delete_record = record_full_delete; | |
2234 | record_full_core_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 2235 | record_full_core_ops.to_record_will_replay = record_full_will_replay; |
88d1aa9d MM |
2236 | record_full_core_ops.to_goto_record_begin = record_full_goto_begin; |
2237 | record_full_core_ops.to_goto_record_end = record_full_goto_end; | |
2238 | record_full_core_ops.to_goto_record = record_full_goto; | |
2239 | record_full_core_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2240 | } |
2241 | ||
2242 | /* Record log save-file format | |
2243 | Version 1 (never released) | |
2244 | ||
2245 | Header: | |
2246 | 4 bytes: magic number htonl(0x20090829). | |
2247 | NOTE: be sure to change whenever this file format changes! | |
2248 | ||
2249 | Records: | |
88d1aa9d MM |
2250 | record_full_end: |
2251 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2252 | record_full_reg: | |
2253 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2254 | 8 bytes: register id (network byte order). |
2255 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2256 | record_full_mem: |
2257 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2258 | 8 bytes: memory length (network byte order). |
2259 | 8 bytes: memory address (network byte order). | |
2260 | n bytes: memory value (n == memory length). | |
2261 | ||
2262 | Version 2 | |
2263 | 4 bytes: magic number netorder32(0x20091016). | |
2264 | NOTE: be sure to change whenever this file format changes! | |
2265 | ||
2266 | Records: | |
88d1aa9d MM |
2267 | record_full_end: |
2268 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2269 | 4 bytes: signal |
2270 | 4 bytes: instruction count | |
88d1aa9d MM |
2271 | record_full_reg: |
2272 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2273 | 4 bytes: register id (network byte order). |
2274 | n bytes: register value (n == actual register size). | |
2275 | (eg. 4 bytes for x86 general registers). | |
88d1aa9d MM |
2276 | record_full_mem: |
2277 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2278 | 4 bytes: memory length (network byte order). |
2279 | 8 bytes: memory address (network byte order). | |
2280 | n bytes: memory value (n == memory length). | |
2281 | ||
2282 | */ | |
2283 | ||
2284 | /* bfdcore_read -- read bytes from a core file section. */ | |
2285 | ||
2286 | static inline void | |
2287 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2288 | { | |
2289 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2290 | ||
2291 | if (ret) | |
2292 | *offset += len; | |
2293 | else | |
2294 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2295 | len, bfd_get_filename (obfd), | |
2296 | bfd_errmsg (bfd_get_error ())); | |
2297 | } | |
2298 | ||
2299 | static inline uint64_t | |
2300 | netorder64 (uint64_t input) | |
2301 | { | |
2302 | uint64_t ret; | |
2303 | ||
2304 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2305 | BFD_ENDIAN_BIG, input); | |
2306 | return ret; | |
2307 | } | |
2308 | ||
2309 | static inline uint32_t | |
2310 | netorder32 (uint32_t input) | |
2311 | { | |
2312 | uint32_t ret; | |
2313 | ||
d02ed0bb MM |
2314 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), |
2315 | BFD_ENDIAN_BIG, input); | |
2316 | return ret; | |
2317 | } | |
2318 | ||
2319 | /* Restore the execution log from a core_bfd file. */ | |
2320 | static void | |
88d1aa9d | 2321 | record_full_restore (void) |
d02ed0bb MM |
2322 | { |
2323 | uint32_t magic; | |
2324 | struct cleanup *old_cleanups; | |
88d1aa9d | 2325 | struct record_full_entry *rec; |
d02ed0bb MM |
2326 | asection *osec; |
2327 | uint32_t osec_size; | |
2328 | int bfd_offset = 0; | |
2329 | struct regcache *regcache; | |
2330 | ||
2331 | /* We restore the execution log from the open core bfd, | |
2332 | if there is one. */ | |
2333 | if (core_bfd == NULL) | |
2334 | return; | |
2335 | ||
88d1aa9d MM |
2336 | /* "record_full_restore" can only be called when record list is empty. */ |
2337 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2338 | |
2339 | if (record_debug) | |
2340 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2341 | ||
2342 | /* Now need to find our special note section. */ | |
2343 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2344 | if (record_debug) | |
2345 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2346 | osec ? "succeeded" : "failed"); | |
2347 | if (osec == NULL) | |
2348 | return; | |
2349 | osec_size = bfd_section_size (core_bfd, osec); | |
2350 | if (record_debug) | |
2351 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); | |
2352 | ||
2353 | /* Check the magic code. */ | |
2354 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2355 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2356 | error (_("Version mis-match or file format error in core file %s."), |
2357 | bfd_get_filename (core_bfd)); | |
2358 | if (record_debug) | |
2359 | fprintf_unfiltered (gdb_stdlog, | |
2360 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2361 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2362 | phex_nz (netorder32 (magic), 4)); |
2363 | ||
88d1aa9d MM |
2364 | /* Restore the entries in recfd into record_full_arch_list_head and |
2365 | record_full_arch_list_tail. */ | |
2366 | record_full_arch_list_head = NULL; | |
2367 | record_full_arch_list_tail = NULL; | |
2368 | record_full_insn_num = 0; | |
2369 | old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb MM |
2370 | regcache = get_current_regcache (); |
2371 | ||
2372 | while (1) | |
2373 | { | |
2374 | uint8_t rectype; | |
2375 | uint32_t regnum, len, signal, count; | |
2376 | uint64_t addr; | |
2377 | ||
2378 | /* We are finished when offset reaches osec_size. */ | |
2379 | if (bfd_offset >= osec_size) | |
2380 | break; | |
2381 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
2382 | ||
2383 | switch (rectype) | |
2384 | { | |
88d1aa9d | 2385 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2386 | /* Get register number to regnum. */ |
2387 | bfdcore_read (core_bfd, osec, ®num, | |
2388 | sizeof (regnum), &bfd_offset); | |
2389 | regnum = netorder32 (regnum); | |
2390 | ||
88d1aa9d | 2391 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb MM |
2392 | |
2393 | /* Get val. */ | |
88d1aa9d | 2394 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2395 | rec->u.reg.len, &bfd_offset); |
2396 | ||
2397 | if (record_debug) | |
2398 | fprintf_unfiltered (gdb_stdlog, | |
2399 | " Reading register %d (1 " | |
2400 | "plus %lu plus %d bytes)\n", | |
2401 | rec->u.reg.num, | |
2402 | (unsigned long) sizeof (regnum), | |
2403 | rec->u.reg.len); | |
2404 | break; | |
2405 | ||
88d1aa9d | 2406 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2407 | /* Get len. */ |
2408 | bfdcore_read (core_bfd, osec, &len, | |
2409 | sizeof (len), &bfd_offset); | |
2410 | len = netorder32 (len); | |
2411 | ||
2412 | /* Get addr. */ | |
2413 | bfdcore_read (core_bfd, osec, &addr, | |
2414 | sizeof (addr), &bfd_offset); | |
2415 | addr = netorder64 (addr); | |
2416 | ||
88d1aa9d | 2417 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb MM |
2418 | |
2419 | /* Get val. */ | |
88d1aa9d | 2420 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2421 | rec->u.mem.len, &bfd_offset); |
2422 | ||
2423 | if (record_debug) | |
2424 | fprintf_unfiltered (gdb_stdlog, | |
2425 | " Reading memory %s (1 plus " | |
2426 | "%lu plus %lu plus %d bytes)\n", | |
2427 | paddress (get_current_arch (), | |
2428 | rec->u.mem.addr), | |
2429 | (unsigned long) sizeof (addr), | |
2430 | (unsigned long) sizeof (len), | |
2431 | rec->u.mem.len); | |
2432 | break; | |
2433 | ||
88d1aa9d MM |
2434 | case record_full_end: /* end */ |
2435 | rec = record_full_end_alloc (); | |
2436 | record_full_insn_num ++; | |
d02ed0bb MM |
2437 | |
2438 | /* Get signal value. */ | |
2439 | bfdcore_read (core_bfd, osec, &signal, | |
2440 | sizeof (signal), &bfd_offset); | |
2441 | signal = netorder32 (signal); | |
aead7601 | 2442 | rec->u.end.sigval = (enum gdb_signal) signal; |
d02ed0bb MM |
2443 | |
2444 | /* Get insn count. */ | |
2445 | bfdcore_read (core_bfd, osec, &count, | |
2446 | sizeof (count), &bfd_offset); | |
2447 | count = netorder32 (count); | |
2448 | rec->u.end.insn_num = count; | |
88d1aa9d | 2449 | record_full_insn_count = count + 1; |
d02ed0bb MM |
2450 | if (record_debug) |
2451 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2452 | " Reading record_full_end (1 + " |
d02ed0bb MM |
2453 | "%lu + %lu bytes), offset == %s\n", |
2454 | (unsigned long) sizeof (signal), | |
2455 | (unsigned long) sizeof (count), | |
2456 | paddress (get_current_arch (), | |
2457 | bfd_offset)); | |
2458 | break; | |
2459 | ||
2460 | default: | |
2461 | error (_("Bad entry type in core file %s."), | |
2462 | bfd_get_filename (core_bfd)); | |
2463 | break; | |
2464 | } | |
2465 | ||
2466 | /* Add rec to record arch list. */ | |
88d1aa9d | 2467 | record_full_arch_list_add (rec); |
d02ed0bb MM |
2468 | } |
2469 | ||
2470 | discard_cleanups (old_cleanups); | |
2471 | ||
88d1aa9d MM |
2472 | /* Add record_full_arch_list_head to the end of record list. */ |
2473 | record_full_first.next = record_full_arch_list_head; | |
2474 | record_full_arch_list_head->prev = &record_full_first; | |
2475 | record_full_arch_list_tail->next = NULL; | |
2476 | record_full_list = &record_full_first; | |
d02ed0bb | 2477 | |
88d1aa9d MM |
2478 | /* Update record_full_insn_max_num. */ |
2479 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2480 | { |
88d1aa9d | 2481 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2482 | warning (_("Auto increase record/replay buffer limit to %u."), |
88d1aa9d | 2483 | record_full_insn_max_num); |
d02ed0bb MM |
2484 | } |
2485 | ||
2486 | /* Succeeded. */ | |
2487 | printf_filtered (_("Restored records from core file %s.\n"), | |
2488 | bfd_get_filename (core_bfd)); | |
2489 | ||
08d72866 | 2490 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2491 | } |
2492 | ||
2493 | /* bfdcore_write -- write bytes into a core file section. */ | |
2494 | ||
2495 | static inline void | |
2496 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2497 | { | |
2498 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2499 | ||
2500 | if (ret) | |
2501 | *offset += len; | |
2502 | else | |
2503 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2504 | len, bfd_get_filename (obfd), | |
2505 | bfd_errmsg (bfd_get_error ())); | |
2506 | } | |
2507 | ||
2508 | /* Restore the execution log from a file. We use a modified elf | |
2509 | corefile format, with an extra section for our data. */ | |
2510 | ||
2511 | static void | |
41243651 | 2512 | cmd_record_full_restore (const char *args, int from_tty) |
d02ed0bb MM |
2513 | { |
2514 | core_file_command (args, from_tty); | |
88d1aa9d | 2515 | record_full_open (args, from_tty); |
d02ed0bb MM |
2516 | } |
2517 | ||
d02ed0bb MM |
2518 | /* Save the execution log to a file. We use a modified elf corefile |
2519 | format, with an extra section for our data. */ | |
2520 | ||
2521 | static void | |
1390f529 | 2522 | record_full_save (struct target_ops *self, const char *recfilename) |
d02ed0bb | 2523 | { |
88d1aa9d | 2524 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2525 | uint32_t magic; |
2526 | struct regcache *regcache; | |
2527 | struct gdbarch *gdbarch; | |
d02ed0bb MM |
2528 | int save_size = 0; |
2529 | asection *osec = NULL; | |
2530 | int bfd_offset = 0; | |
2531 | ||
2532 | /* Open the save file. */ | |
2533 | if (record_debug) | |
2534 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2535 | recfilename); | |
2536 | ||
2537 | /* Open the output file. */ | |
bef155c3 TT |
2538 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (recfilename)); |
2539 | ||
2540 | /* Arrange to remove the output file on failure. */ | |
2541 | gdb::unlinker unlink_file (recfilename); | |
d02ed0bb | 2542 | |
88d1aa9d MM |
2543 | /* Save the current record entry to "cur_record_full_list". */ |
2544 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2545 | |
2546 | /* Get the values of regcache and gdbarch. */ | |
2547 | regcache = get_current_regcache (); | |
ac7936df | 2548 | gdbarch = regcache->arch (); |
d02ed0bb MM |
2549 | |
2550 | /* Disable the GDB operation record. */ | |
07036511 TT |
2551 | scoped_restore restore_operation_disable |
2552 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
2553 | |
2554 | /* Reverse execute to the begin of record list. */ | |
2555 | while (1) | |
2556 | { | |
2557 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2558 | if (record_full_list == &record_full_first) |
d02ed0bb MM |
2559 | break; |
2560 | ||
88d1aa9d | 2561 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2562 | |
88d1aa9d MM |
2563 | if (record_full_list->prev) |
2564 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2565 | } |
2566 | ||
2567 | /* Compute the size needed for the extra bfd section. */ | |
2568 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2569 | for (record_full_list = record_full_first.next; record_full_list; |
2570 | record_full_list = record_full_list->next) | |
2571 | switch (record_full_list->type) | |
d02ed0bb | 2572 | { |
88d1aa9d | 2573 | case record_full_end: |
d02ed0bb MM |
2574 | save_size += 1 + 4 + 4; |
2575 | break; | |
88d1aa9d MM |
2576 | case record_full_reg: |
2577 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2578 | break; |
88d1aa9d MM |
2579 | case record_full_mem: |
2580 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2581 | break; |
2582 | } | |
2583 | ||
2584 | /* Make the new bfd section. */ | |
bef155c3 | 2585 | osec = bfd_make_section_anyway_with_flags (obfd.get (), "precord", |
d02ed0bb MM |
2586 | SEC_HAS_CONTENTS |
2587 | | SEC_READONLY); | |
2588 | if (osec == NULL) | |
2589 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2590 | recfilename, | |
2591 | bfd_errmsg (bfd_get_error ())); | |
bef155c3 TT |
2592 | bfd_set_section_size (obfd.get (), osec, save_size); |
2593 | bfd_set_section_vma (obfd.get (), osec, 0); | |
2594 | bfd_set_section_alignment (obfd.get (), osec, 0); | |
2595 | bfd_section_lma (obfd.get (), osec) = 0; | |
d02ed0bb MM |
2596 | |
2597 | /* Save corefile state. */ | |
bef155c3 | 2598 | write_gcore_file (obfd.get ()); |
d02ed0bb MM |
2599 | |
2600 | /* Write out the record log. */ | |
2601 | /* Write the magic code. */ | |
88d1aa9d | 2602 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2603 | if (record_debug) |
2604 | fprintf_unfiltered (gdb_stdlog, | |
2605 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2606 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb | 2607 | phex_nz (magic, 4)); |
bef155c3 | 2608 | bfdcore_write (obfd.get (), osec, &magic, sizeof (magic), &bfd_offset); |
d02ed0bb MM |
2609 | |
2610 | /* Save the entries to recfd and forward execute to the end of | |
2611 | record list. */ | |
88d1aa9d | 2612 | record_full_list = &record_full_first; |
d02ed0bb MM |
2613 | while (1) |
2614 | { | |
2615 | /* Save entry. */ | |
88d1aa9d | 2616 | if (record_full_list != &record_full_first) |
d02ed0bb MM |
2617 | { |
2618 | uint8_t type; | |
2619 | uint32_t regnum, len, signal, count; | |
2620 | uint64_t addr; | |
2621 | ||
88d1aa9d | 2622 | type = record_full_list->type; |
bef155c3 | 2623 | bfdcore_write (obfd.get (), osec, &type, sizeof (type), &bfd_offset); |
d02ed0bb | 2624 | |
88d1aa9d | 2625 | switch (record_full_list->type) |
d02ed0bb | 2626 | { |
88d1aa9d | 2627 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2628 | if (record_debug) |
2629 | fprintf_unfiltered (gdb_stdlog, | |
2630 | " Writing register %d (1 " | |
2631 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2632 | record_full_list->u.reg.num, |
d02ed0bb | 2633 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2634 | record_full_list->u.reg.len); |
d02ed0bb MM |
2635 | |
2636 | /* Write regnum. */ | |
88d1aa9d | 2637 | regnum = netorder32 (record_full_list->u.reg.num); |
bef155c3 | 2638 | bfdcore_write (obfd.get (), osec, ®num, |
d02ed0bb MM |
2639 | sizeof (regnum), &bfd_offset); |
2640 | ||
2641 | /* Write regval. */ | |
bef155c3 | 2642 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2643 | record_full_get_loc (record_full_list), |
2644 | record_full_list->u.reg.len, &bfd_offset); | |
d02ed0bb MM |
2645 | break; |
2646 | ||
88d1aa9d | 2647 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2648 | if (record_debug) |
2649 | fprintf_unfiltered (gdb_stdlog, | |
2650 | " Writing memory %s (1 plus " | |
2651 | "%lu plus %lu plus %d bytes)\n", | |
2652 | paddress (gdbarch, | |
88d1aa9d | 2653 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2654 | (unsigned long) sizeof (addr), |
2655 | (unsigned long) sizeof (len), | |
88d1aa9d | 2656 | record_full_list->u.mem.len); |
d02ed0bb MM |
2657 | |
2658 | /* Write memlen. */ | |
88d1aa9d | 2659 | len = netorder32 (record_full_list->u.mem.len); |
bef155c3 TT |
2660 | bfdcore_write (obfd.get (), osec, &len, sizeof (len), |
2661 | &bfd_offset); | |
d02ed0bb MM |
2662 | |
2663 | /* Write memaddr. */ | |
88d1aa9d | 2664 | addr = netorder64 (record_full_list->u.mem.addr); |
bef155c3 | 2665 | bfdcore_write (obfd.get (), osec, &addr, |
d02ed0bb MM |
2666 | sizeof (addr), &bfd_offset); |
2667 | ||
2668 | /* Write memval. */ | |
bef155c3 | 2669 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2670 | record_full_get_loc (record_full_list), |
2671 | record_full_list->u.mem.len, &bfd_offset); | |
d02ed0bb MM |
2672 | break; |
2673 | ||
88d1aa9d | 2674 | case record_full_end: |
d02ed0bb MM |
2675 | if (record_debug) |
2676 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2677 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2678 | "%lu + %lu bytes)\n", |
2679 | (unsigned long) sizeof (signal), | |
2680 | (unsigned long) sizeof (count)); | |
2681 | /* Write signal value. */ | |
88d1aa9d | 2682 | signal = netorder32 (record_full_list->u.end.sigval); |
bef155c3 | 2683 | bfdcore_write (obfd.get (), osec, &signal, |
d02ed0bb MM |
2684 | sizeof (signal), &bfd_offset); |
2685 | ||
2686 | /* Write insn count. */ | |
88d1aa9d | 2687 | count = netorder32 (record_full_list->u.end.insn_num); |
bef155c3 | 2688 | bfdcore_write (obfd.get (), osec, &count, |
d02ed0bb MM |
2689 | sizeof (count), &bfd_offset); |
2690 | break; | |
2691 | } | |
2692 | } | |
2693 | ||
2694 | /* Execute entry. */ | |
88d1aa9d | 2695 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2696 | |
88d1aa9d MM |
2697 | if (record_full_list->next) |
2698 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
2699 | else |
2700 | break; | |
2701 | } | |
2702 | ||
88d1aa9d | 2703 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2704 | while (1) |
2705 | { | |
2706 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2707 | if (record_full_list == cur_record_full_list) |
d02ed0bb MM |
2708 | break; |
2709 | ||
88d1aa9d | 2710 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2711 | |
88d1aa9d MM |
2712 | if (record_full_list->prev) |
2713 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2714 | } |
2715 | ||
bef155c3 | 2716 | unlink_file.keep (); |
d02ed0bb MM |
2717 | |
2718 | /* Succeeded. */ | |
2719 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2720 | recfilename); | |
2721 | } | |
2722 | ||
88d1aa9d | 2723 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2724 | depending on DIR) to the given entry, changing the program state |
2725 | correspondingly. */ | |
2726 | ||
2727 | static void | |
88d1aa9d MM |
2728 | record_full_goto_insn (struct record_full_entry *entry, |
2729 | enum exec_direction_kind dir) | |
d02ed0bb | 2730 | { |
07036511 TT |
2731 | scoped_restore restore_operation_disable |
2732 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 2733 | struct regcache *regcache = get_current_regcache (); |
ac7936df | 2734 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb MM |
2735 | |
2736 | /* Assume everything is valid: we will hit the entry, | |
2737 | and we will not hit the end of the recording. */ | |
2738 | ||
2739 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2740 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2741 | |
2742 | do | |
2743 | { | |
88d1aa9d | 2744 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2745 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2746 | record_full_list = record_full_list->prev; |
d02ed0bb | 2747 | else |
88d1aa9d MM |
2748 | record_full_list = record_full_list->next; |
2749 | } while (record_full_list != entry); | |
d02ed0bb MM |
2750 | } |
2751 | ||
2752 | /* Alias for "target record-full". */ | |
2753 | ||
2754 | static void | |
981a3fb3 | 2755 | cmd_record_full_start (const char *args, int from_tty) |
d02ed0bb | 2756 | { |
95a6b0a1 | 2757 | execute_command ("target record-full", from_tty); |
d02ed0bb MM |
2758 | } |
2759 | ||
2760 | static void | |
eb4c3f4a | 2761 | set_record_full_insn_max_num (const char *args, int from_tty, |
88d1aa9d | 2762 | struct cmd_list_element *c) |
d02ed0bb | 2763 | { |
7ee70bf5 | 2764 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2765 | { |
88d1aa9d MM |
2766 | /* Count down record_full_insn_num while releasing records from list. */ |
2767 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2768 | { |
88d1aa9d MM |
2769 | record_full_list_release_first (); |
2770 | record_full_insn_num--; | |
d02ed0bb MM |
2771 | } |
2772 | } | |
2773 | } | |
2774 | ||
2775 | /* The "set record full" command. */ | |
2776 | ||
2777 | static void | |
981a3fb3 | 2778 | set_record_full_command (const char *args, int from_tty) |
d02ed0bb MM |
2779 | { |
2780 | printf_unfiltered (_("\"set record full\" must be followed " | |
981a3fb3 | 2781 | "by an appropriate subcommand.\n")); |
d02ed0bb MM |
2782 | help_list (set_record_full_cmdlist, "set record full ", all_commands, |
2783 | gdb_stdout); | |
2784 | } | |
2785 | ||
2786 | /* The "show record full" command. */ | |
2787 | ||
2788 | static void | |
981a3fb3 | 2789 | show_record_full_command (const char *args, int from_tty) |
d02ed0bb MM |
2790 | { |
2791 | cmd_show_list (show_record_full_cmdlist, from_tty, ""); | |
2792 | } | |
2793 | ||
d02ed0bb MM |
2794 | void |
2795 | _initialize_record_full (void) | |
2796 | { | |
2797 | struct cmd_list_element *c; | |
2798 | ||
88d1aa9d MM |
2799 | /* Init record_full_first. */ |
2800 | record_full_first.prev = NULL; | |
2801 | record_full_first.next = NULL; | |
2802 | record_full_first.type = record_full_end; | |
d02ed0bb | 2803 | |
88d1aa9d MM |
2804 | init_record_full_ops (); |
2805 | add_target (&record_full_ops); | |
2806 | add_deprecated_target_alias (&record_full_ops, "record"); | |
2807 | init_record_full_core_ops (); | |
2808 | add_target (&record_full_core_ops); | |
d02ed0bb | 2809 | |
88d1aa9d | 2810 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb MM |
2811 | _("Start full execution recording."), &record_full_cmdlist, |
2812 | "record full ", 0, &record_cmdlist); | |
2813 | ||
88d1aa9d | 2814 | c = add_cmd ("restore", class_obscure, cmd_record_full_restore, |
d02ed0bb MM |
2815 | _("Restore the execution log from a file.\n\ |
2816 | Argument is filename. File must be created with 'record save'."), | |
2817 | &record_full_cmdlist); | |
2818 | set_cmd_completer (c, filename_completer); | |
2819 | ||
2820 | /* Deprecate the old version without "full" prefix. */ | |
2821 | c = add_alias_cmd ("restore", "full restore", class_obscure, 1, | |
2822 | &record_cmdlist); | |
2823 | set_cmd_completer (c, filename_completer); | |
2824 | deprecate_cmd (c, "record full restore"); | |
2825 | ||
2826 | add_prefix_cmd ("full", class_support, set_record_full_command, | |
2827 | _("Set record options"), &set_record_full_cmdlist, | |
2828 | "set record full ", 0, &set_record_cmdlist); | |
2829 | ||
2830 | add_prefix_cmd ("full", class_support, show_record_full_command, | |
2831 | _("Show record options"), &show_record_full_cmdlist, | |
2832 | "show record full ", 0, &show_record_cmdlist); | |
2833 | ||
2834 | /* Record instructions number limit command. */ | |
2835 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
88d1aa9d | 2836 | &record_full_stop_at_limit, _("\ |
d02ed0bb MM |
2837 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2838 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2839 | _("Default is ON.\n\ | |
2840 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2841 | When OFF, if the record/replay buffer becomes full,\n\ | |
2842 | delete the oldest recorded instruction to make room for each new one."), | |
2843 | NULL, NULL, | |
2844 | &set_record_full_cmdlist, &show_record_full_cmdlist); | |
2845 | ||
2846 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2847 | &set_record_cmdlist); | |
2848 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2849 | ||
2850 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2851 | &show_record_cmdlist); | |
2852 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2853 | ||
88d1aa9d MM |
2854 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
2855 | &record_full_insn_max_num, | |
d02ed0bb MM |
2856 | _("Set record/replay buffer limit."), |
2857 | _("Show record/replay buffer limit."), _("\ | |
2858 | Set the maximum number of instructions to be stored in the\n\ | |
f81d1120 PA |
2859 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2860 | limit. Default is 200000."), | |
88d1aa9d | 2861 | set_record_full_insn_max_num, |
d02ed0bb MM |
2862 | NULL, &set_record_full_cmdlist, |
2863 | &show_record_full_cmdlist); | |
2864 | ||
2865 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2866 | &set_record_cmdlist); | |
2867 | deprecate_cmd (c, "set record full insn-number-max"); | |
2868 | ||
2869 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2870 | &show_record_cmdlist); | |
2871 | deprecate_cmd (c, "show record full insn-number-max"); | |
2872 | ||
88d1aa9d | 2873 | add_setshow_boolean_cmd ("memory-query", no_class, |
25ea693b | 2874 | &record_full_memory_query, _("\ |
d02ed0bb MM |
2875 | Set whether query if PREC cannot record memory change of next instruction."), |
2876 | _("\ | |
2877 | Show whether query if PREC cannot record memory change of next instruction."), | |
2878 | _("\ | |
2879 | Default is OFF.\n\ | |
2880 | When ON, query if PREC cannot record memory change of next instruction."), | |
2881 | NULL, NULL, | |
88d1aa9d MM |
2882 | &set_record_full_cmdlist, |
2883 | &show_record_full_cmdlist); | |
d02ed0bb MM |
2884 | |
2885 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2886 | &set_record_cmdlist); | |
2887 | deprecate_cmd (c, "set record full memory-query"); | |
2888 | ||
2889 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2890 | &show_record_cmdlist); | |
2891 | deprecate_cmd (c, "show record full memory-query"); | |
2892 | } |