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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; | |
d02ed0bb MM |
247 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
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 MM |
567 | |
568 | static int | |
88d1aa9d | 569 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
570 | { |
571 | int ret; | |
572 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
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 | return 1; | |
638 | } | |
639 | ||
88d1aa9d | 640 | struct record_full_message_args { |
d02ed0bb MM |
641 | struct regcache *regcache; |
642 | enum gdb_signal signal; | |
643 | }; | |
644 | ||
645 | static int | |
88d1aa9d | 646 | record_full_message_wrapper (void *args) |
d02ed0bb | 647 | { |
19ba03f4 SM |
648 | struct record_full_message_args *record_full_args |
649 | = (struct record_full_message_args *) args; | |
d02ed0bb | 650 | |
88d1aa9d MM |
651 | return record_full_message (record_full_args->regcache, |
652 | record_full_args->signal); | |
d02ed0bb MM |
653 | } |
654 | ||
655 | static int | |
88d1aa9d MM |
656 | record_full_message_wrapper_safe (struct regcache *regcache, |
657 | enum gdb_signal signal) | |
d02ed0bb | 658 | { |
88d1aa9d | 659 | struct record_full_message_args args; |
d02ed0bb MM |
660 | |
661 | args.regcache = regcache; | |
662 | args.signal = signal; | |
663 | ||
7cc53fba | 664 | return catch_errors (record_full_message_wrapper, &args, "", |
88d1aa9d | 665 | RETURN_MASK_ALL); |
d02ed0bb MM |
666 | } |
667 | ||
88d1aa9d | 668 | /* Set to 1 if record_full_store_registers and record_full_xfer_partial |
d02ed0bb MM |
669 | doesn't need record. */ |
670 | ||
88d1aa9d | 671 | static int record_full_gdb_operation_disable = 0; |
d02ed0bb | 672 | |
07036511 | 673 | scoped_restore_tmpl<int> |
25ea693b | 674 | record_full_gdb_operation_disable_set (void) |
d02ed0bb | 675 | { |
07036511 | 676 | return make_scoped_restore (&record_full_gdb_operation_disable, 1); |
d02ed0bb MM |
677 | } |
678 | ||
679 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ | |
9e8915c6 PA |
680 | static enum target_stop_reason record_full_stop_reason |
681 | = TARGET_STOPPED_BY_NO_REASON; | |
d02ed0bb MM |
682 | |
683 | /* Execute one instruction from the record log. Each instruction in | |
684 | the log will be represented by an arbitrary sequence of register | |
685 | entries and memory entries, followed by an 'end' entry. */ | |
686 | ||
687 | static inline void | |
88d1aa9d MM |
688 | record_full_exec_insn (struct regcache *regcache, |
689 | struct gdbarch *gdbarch, | |
690 | struct record_full_entry *entry) | |
d02ed0bb MM |
691 | { |
692 | switch (entry->type) | |
693 | { | |
88d1aa9d | 694 | case record_full_reg: /* reg */ |
d02ed0bb | 695 | { |
d7dcbefc | 696 | gdb::byte_vector reg (entry->u.reg.len); |
d02ed0bb MM |
697 | |
698 | if (record_debug > 1) | |
699 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 700 | "Process record: record_full_reg %s to " |
d02ed0bb MM |
701 | "inferior num = %d.\n", |
702 | host_address_to_string (entry), | |
703 | entry->u.reg.num); | |
704 | ||
d7dcbefc | 705 | regcache_cooked_read (regcache, entry->u.reg.num, reg.data ()); |
d02ed0bb | 706 | regcache_cooked_write (regcache, entry->u.reg.num, |
88d1aa9d | 707 | record_full_get_loc (entry)); |
d7dcbefc | 708 | memcpy (record_full_get_loc (entry), reg.data (), entry->u.reg.len); |
d02ed0bb MM |
709 | } |
710 | break; | |
711 | ||
88d1aa9d | 712 | case record_full_mem: /* mem */ |
d02ed0bb MM |
713 | { |
714 | /* Nothing to do if the entry is flagged not_accessible. */ | |
715 | if (!entry->u.mem.mem_entry_not_accessible) | |
716 | { | |
394816ee MK |
717 | gdb_byte *mem = (gdb_byte *) xmalloc (entry->u.mem.len); |
718 | struct cleanup *cleanup = make_cleanup (xfree, mem); | |
d02ed0bb MM |
719 | |
720 | if (record_debug > 1) | |
721 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 722 | "Process record: record_full_mem %s to " |
d02ed0bb MM |
723 | "inferior addr = %s len = %d.\n", |
724 | host_address_to_string (entry), | |
725 | paddress (gdbarch, entry->u.mem.addr), | |
726 | entry->u.mem.len); | |
727 | ||
728 | if (record_read_memory (gdbarch, | |
729 | entry->u.mem.addr, mem, entry->u.mem.len)) | |
730 | entry->u.mem.mem_entry_not_accessible = 1; | |
731 | else | |
732 | { | |
733 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 734 | record_full_get_loc (entry), |
d02ed0bb MM |
735 | entry->u.mem.len)) |
736 | { | |
737 | entry->u.mem.mem_entry_not_accessible = 1; | |
738 | if (record_debug) | |
739 | warning (_("Process record: error writing memory at " | |
740 | "addr = %s len = %d."), | |
741 | paddress (gdbarch, entry->u.mem.addr), | |
742 | entry->u.mem.len); | |
743 | } | |
744 | else | |
745 | { | |
88d1aa9d MM |
746 | memcpy (record_full_get_loc (entry), mem, |
747 | entry->u.mem.len); | |
d02ed0bb MM |
748 | |
749 | /* We've changed memory --- check if a hardware | |
750 | watchpoint should trap. Note that this | |
751 | presently assumes the target beneath supports | |
752 | continuable watchpoints. On non-continuable | |
753 | watchpoints target, we'll want to check this | |
754 | _before_ actually doing the memory change, and | |
755 | not doing the change at all if the watchpoint | |
756 | traps. */ | |
757 | if (hardware_watchpoint_inserted_in_range | |
758 | (get_regcache_aspace (regcache), | |
759 | entry->u.mem.addr, entry->u.mem.len)) | |
9e8915c6 | 760 | record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb MM |
761 | } |
762 | } | |
394816ee MK |
763 | |
764 | do_cleanups (cleanup); | |
d02ed0bb MM |
765 | } |
766 | } | |
767 | break; | |
768 | } | |
769 | } | |
770 | ||
88d1aa9d | 771 | static void record_full_restore (void); |
d02ed0bb MM |
772 | |
773 | /* Asynchronous signal handle registered as event loop source for when | |
774 | we have pending events ready to be passed to the core. */ | |
775 | ||
88d1aa9d | 776 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
777 | |
778 | static void | |
88d1aa9d | 779 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb MM |
780 | { |
781 | inferior_event_handler (INF_REG_EVENT, NULL); | |
782 | } | |
783 | ||
784 | /* Open the process record target. */ | |
785 | ||
786 | static void | |
014f9477 | 787 | record_full_core_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
788 | { |
789 | struct regcache *regcache = get_current_regcache (); | |
790 | int regnum = gdbarch_num_regs (get_regcache_arch (regcache)); | |
791 | int i; | |
792 | ||
88d1aa9d | 793 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 794 | target_fetch_registers (regcache, -1); |
224c3ddb | 795 | record_full_core_regbuf = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE * regnum); |
d02ed0bb MM |
796 | for (i = 0; i < regnum; i ++) |
797 | regcache_raw_collect (regcache, i, | |
88d1aa9d | 798 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb | 799 | |
88d1aa9d MM |
800 | /* Get record_full_core_start and record_full_core_end. */ |
801 | if (build_section_table (core_bfd, &record_full_core_start, | |
802 | &record_full_core_end)) | |
d02ed0bb | 803 | { |
88d1aa9d MM |
804 | xfree (record_full_core_regbuf); |
805 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
806 | error (_("\"%s\": Can't find sections: %s"), |
807 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
808 | } | |
809 | ||
88d1aa9d MM |
810 | push_target (&record_full_core_ops); |
811 | record_full_restore (); | |
d02ed0bb MM |
812 | } |
813 | ||
814 | /* "to_open" target method for 'live' processes. */ | |
815 | ||
816 | static void | |
014f9477 | 817 | record_full_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
818 | { |
819 | if (record_debug) | |
0a0640e3 | 820 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open_1\n"); |
d02ed0bb MM |
821 | |
822 | /* check exec */ | |
823 | if (!target_has_execution) | |
824 | error (_("Process record: the program is not being run.")); | |
825 | if (non_stop) | |
826 | error (_("Process record target can't debug inferior in non-stop mode " | |
827 | "(non-stop).")); | |
828 | ||
829 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
830 | error (_("Process record: the current architecture doesn't support " | |
831 | "record function.")); | |
832 | ||
88d1aa9d | 833 | push_target (&record_full_ops); |
d02ed0bb MM |
834 | } |
835 | ||
88d1aa9d | 836 | static void record_full_init_record_breakpoints (void); |
d02ed0bb MM |
837 | |
838 | /* "to_open" target method. Open the process record target. */ | |
839 | ||
840 | static void | |
014f9477 | 841 | record_full_open (const char *name, int from_tty) |
d02ed0bb MM |
842 | { |
843 | struct target_ops *t; | |
844 | ||
845 | if (record_debug) | |
88d1aa9d | 846 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 847 | |
8213266a | 848 | record_preopen (); |
d02ed0bb | 849 | |
d02ed0bb | 850 | /* Reset */ |
88d1aa9d MM |
851 | record_full_insn_num = 0; |
852 | record_full_insn_count = 0; | |
853 | record_full_list = &record_full_first; | |
854 | record_full_list->next = NULL; | |
d02ed0bb | 855 | |
d02ed0bb | 856 | if (core_bfd) |
88d1aa9d | 857 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 858 | else |
88d1aa9d | 859 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
860 | |
861 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
862 | record_full_async_inferior_event_token |
863 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
d02ed0bb MM |
864 | NULL); |
865 | ||
88d1aa9d | 866 | record_full_init_record_breakpoints (); |
d02ed0bb | 867 | |
38b022b4 | 868 | observer_notify_record_changed (current_inferior (), 1, "full", NULL); |
d02ed0bb MM |
869 | } |
870 | ||
871 | /* "to_close" target method. Close the process record target. */ | |
872 | ||
873 | static void | |
de90e03d | 874 | record_full_close (struct target_ops *self) |
d02ed0bb | 875 | { |
88d1aa9d | 876 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
877 | |
878 | if (record_debug) | |
88d1aa9d | 879 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 880 | |
88d1aa9d | 881 | record_full_list_release (record_full_list); |
d02ed0bb | 882 | |
88d1aa9d MM |
883 | /* Release record_full_core_regbuf. */ |
884 | if (record_full_core_regbuf) | |
d02ed0bb | 885 | { |
88d1aa9d MM |
886 | xfree (record_full_core_regbuf); |
887 | record_full_core_regbuf = NULL; | |
d02ed0bb MM |
888 | } |
889 | ||
88d1aa9d MM |
890 | /* Release record_full_core_buf_list. */ |
891 | if (record_full_core_buf_list) | |
d02ed0bb | 892 | { |
88d1aa9d MM |
893 | for (entry = record_full_core_buf_list->prev; entry; |
894 | entry = entry->prev) | |
d02ed0bb | 895 | { |
88d1aa9d MM |
896 | xfree (record_full_core_buf_list); |
897 | record_full_core_buf_list = entry; | |
d02ed0bb | 898 | } |
88d1aa9d | 899 | record_full_core_buf_list = NULL; |
d02ed0bb MM |
900 | } |
901 | ||
88d1aa9d MM |
902 | if (record_full_async_inferior_event_token) |
903 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
904 | } |
905 | ||
b7d2e916 PA |
906 | /* "to_async" target method. */ |
907 | ||
908 | static void | |
6a3753b3 | 909 | record_full_async (struct target_ops *ops, int enable) |
b7d2e916 | 910 | { |
6a3753b3 | 911 | if (enable) |
b7d2e916 PA |
912 | mark_async_event_handler (record_full_async_inferior_event_token); |
913 | else | |
914 | clear_async_event_handler (record_full_async_inferior_event_token); | |
915 | ||
6a3753b3 | 916 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
917 | } |
918 | ||
88d1aa9d | 919 | static int record_full_resume_step = 0; |
d02ed0bb | 920 | |
88d1aa9d MM |
921 | /* True if we've been resumed, and so each record_full_wait call should |
922 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 923 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 924 | static int record_full_resumed = 0; |
d02ed0bb MM |
925 | |
926 | /* The execution direction of the last resume we got. This is | |
927 | necessary for async mode. Vis (order is not strictly accurate): | |
928 | ||
929 | 1. user has the global execution direction set to forward | |
930 | 2. user does a reverse-step command | |
88d1aa9d | 931 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
932 | temporarily switched to reverse |
933 | 4. GDB's execution direction is reverted back to forward | |
934 | 5. target record notifies event loop there's an event to handle | |
935 | 6. infrun asks the target which direction was it going, and switches | |
936 | the global execution direction accordingly (to reverse) | |
937 | 7. infrun polls an event out of the record target, and handles it | |
938 | 8. GDB goes back to the event loop, and goto #4. | |
939 | */ | |
88d1aa9d | 940 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb MM |
941 | |
942 | /* "to_resume" target method. Resume the process record target. */ | |
943 | ||
944 | static void | |
88d1aa9d MM |
945 | record_full_resume (struct target_ops *ops, ptid_t ptid, int step, |
946 | enum gdb_signal signal) | |
d02ed0bb | 947 | { |
88d1aa9d MM |
948 | record_full_resume_step = step; |
949 | record_full_resumed = 1; | |
950 | record_full_execution_dir = execution_direction; | |
d02ed0bb | 951 | |
88d1aa9d | 952 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
953 | { |
954 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
955 | ||
88d1aa9d | 956 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
957 | |
958 | if (!step) | |
959 | { | |
960 | /* This is not hard single step. */ | |
961 | if (!gdbarch_software_single_step_p (gdbarch)) | |
962 | { | |
963 | /* This is a normal continue. */ | |
964 | step = 1; | |
965 | } | |
966 | else | |
967 | { | |
8ce9efb0 | 968 | /* This arch supports soft single step. */ |
34b7e8a6 | 969 | if (thread_has_single_step_breakpoints_set (inferior_thread ())) |
d02ed0bb MM |
970 | { |
971 | /* This is a soft single step. */ | |
88d1aa9d | 972 | record_full_resume_step = 1; |
d02ed0bb MM |
973 | } |
974 | else | |
93f9a11f | 975 | step = !insert_single_step_breakpoints (gdbarch); |
d02ed0bb MM |
976 | } |
977 | } | |
978 | ||
979 | /* Make sure the target beneath reports all signals. */ | |
980 | target_pass_signals (0, NULL); | |
981 | ||
6b84065d | 982 | ops->beneath->to_resume (ops->beneath, ptid, step, signal); |
d02ed0bb MM |
983 | } |
984 | ||
985 | /* We are about to start executing the inferior (or simulate it), | |
986 | let's register it with the event loop. */ | |
987 | if (target_can_async_p ()) | |
6a3753b3 | 988 | target_async (1); |
d02ed0bb MM |
989 | } |
990 | ||
85ad3aaf PA |
991 | /* "to_commit_resume" method for process record target. */ |
992 | ||
993 | static void | |
994 | record_full_commit_resume (struct target_ops *ops) | |
995 | { | |
996 | if (!RECORD_FULL_IS_REPLAY) | |
997 | ops->beneath->to_commit_resume (ops->beneath); | |
998 | } | |
999 | ||
88d1aa9d | 1000 | static int record_full_get_sig = 0; |
d02ed0bb MM |
1001 | |
1002 | /* SIGINT signal handler, registered by "to_wait" method. */ | |
1003 | ||
1004 | static void | |
88d1aa9d | 1005 | record_full_sig_handler (int signo) |
d02ed0bb MM |
1006 | { |
1007 | if (record_debug) | |
1008 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1009 | ||
1010 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 1011 | record_full_resume_step = 1; |
d02ed0bb | 1012 | |
88d1aa9d | 1013 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1014 | SIGINT. */ |
88d1aa9d | 1015 | record_full_get_sig = 1; |
d02ed0bb MM |
1016 | } |
1017 | ||
1018 | static void | |
88d1aa9d | 1019 | record_full_wait_cleanups (void *ignore) |
d02ed0bb MM |
1020 | { |
1021 | if (execution_direction == EXEC_REVERSE) | |
1022 | { | |
88d1aa9d MM |
1023 | if (record_full_list->next) |
1024 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1025 | } |
1026 | else | |
88d1aa9d | 1027 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
1028 | } |
1029 | ||
1030 | /* "to_wait" target method for process record target. | |
1031 | ||
1032 | In record mode, the target is always run in singlestep mode | |
1033 | (even when gdb says to continue). The to_wait method intercepts | |
1034 | the stop events and determines which ones are to be passed on to | |
1035 | gdb. Most stop events are just singlestep events that gdb is not | |
1036 | to know about, so the to_wait method just records them and keeps | |
1037 | singlestepping. | |
1038 | ||
1039 | In replay mode, this function emulates the recorded execution log, | |
1040 | one instruction at a time (forward or backward), and determines | |
1041 | where to stop. */ | |
1042 | ||
1043 | static ptid_t | |
88d1aa9d MM |
1044 | record_full_wait_1 (struct target_ops *ops, |
1045 | ptid_t ptid, struct target_waitstatus *status, | |
1046 | int options) | |
d02ed0bb | 1047 | { |
07036511 TT |
1048 | scoped_restore restore_operation_disable |
1049 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
1050 | |
1051 | if (record_debug) | |
1052 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1053 | "Process record: record_full_wait " |
1054 | "record_full_resume_step = %d, " | |
1055 | "record_full_resumed = %d, direction=%s\n", | |
1056 | record_full_resume_step, record_full_resumed, | |
1057 | record_full_execution_dir == EXEC_FORWARD | |
1058 | ? "forward" : "reverse"); | |
1059 | ||
1060 | if (!record_full_resumed) | |
d02ed0bb MM |
1061 | { |
1062 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1063 | ||
1064 | /* No interesting event. */ | |
1065 | status->kind = TARGET_WAITKIND_IGNORE; | |
1066 | return minus_one_ptid; | |
1067 | } | |
1068 | ||
88d1aa9d MM |
1069 | record_full_get_sig = 0; |
1070 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1071 | |
9e8915c6 PA |
1072 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1073 | ||
88d1aa9d | 1074 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1075 | { |
88d1aa9d | 1076 | if (record_full_resume_step) |
d02ed0bb MM |
1077 | { |
1078 | /* This is a single step. */ | |
6b84065d | 1079 | return ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1080 | } |
1081 | else | |
1082 | { | |
1083 | /* This is not a single step. */ | |
1084 | ptid_t ret; | |
1085 | CORE_ADDR tmp_pc; | |
1086 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); | |
1087 | ||
1088 | while (1) | |
1089 | { | |
34b7e8a6 PA |
1090 | struct thread_info *tp; |
1091 | ||
6b84065d | 1092 | ret = ops->beneath->to_wait (ops->beneath, ptid, status, options); |
d02ed0bb MM |
1093 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1094 | { | |
1095 | if (record_debug) | |
1096 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1097 | "Process record: record_full_wait " |
d02ed0bb MM |
1098 | "target beneath not done yet\n"); |
1099 | return ret; | |
1100 | } | |
1101 | ||
34b7e8a6 PA |
1102 | ALL_NON_EXITED_THREADS (tp) |
1103 | delete_single_step_breakpoints (tp); | |
d02ed0bb | 1104 | |
88d1aa9d | 1105 | if (record_full_resume_step) |
d02ed0bb MM |
1106 | return ret; |
1107 | ||
1108 | /* Is this a SIGTRAP? */ | |
1109 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1110 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1111 | { | |
1112 | struct regcache *regcache; | |
1113 | struct address_space *aspace; | |
9e8915c6 PA |
1114 | enum target_stop_reason *stop_reason_p |
1115 | = &record_full_stop_reason; | |
d02ed0bb MM |
1116 | |
1117 | /* Yes -- this is likely our single-step finishing, | |
1118 | but check if there's any reason the core would be | |
1119 | interested in the event. */ | |
1120 | ||
1121 | registers_changed (); | |
1122 | regcache = get_current_regcache (); | |
1123 | tmp_pc = regcache_read_pc (regcache); | |
1124 | aspace = get_regcache_aspace (regcache); | |
1125 | ||
1126 | if (target_stopped_by_watchpoint ()) | |
1127 | { | |
1128 | /* Always interested in watchpoints. */ | |
1129 | } | |
9e8915c6 PA |
1130 | else if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1131 | stop_reason_p)) | |
d02ed0bb MM |
1132 | { |
1133 | /* There is a breakpoint here. Let the core | |
1134 | handle it. */ | |
d02ed0bb MM |
1135 | } |
1136 | else | |
1137 | { | |
1138 | /* This is a single-step trap. Record the | |
1139 | insn and issue another step. | |
1140 | FIXME: this part can be a random SIGTRAP too. | |
1141 | But GDB cannot handle it. */ | |
1142 | int step = 1; | |
1143 | ||
88d1aa9d MM |
1144 | if (!record_full_message_wrapper_safe (regcache, |
1145 | GDB_SIGNAL_0)) | |
d02ed0bb MM |
1146 | { |
1147 | status->kind = TARGET_WAITKIND_STOPPED; | |
1148 | status->value.sig = GDB_SIGNAL_0; | |
1149 | break; | |
1150 | } | |
1151 | ||
1152 | if (gdbarch_software_single_step_p (gdbarch)) | |
1153 | { | |
1154 | /* Try to insert the software single step breakpoint. | |
1155 | If insert success, set step to 0. */ | |
1156 | set_executing (inferior_ptid, 0); | |
1157 | reinit_frame_cache (); | |
93f9a11f YQ |
1158 | |
1159 | step = !insert_single_step_breakpoints (gdbarch); | |
1160 | ||
d02ed0bb MM |
1161 | set_executing (inferior_ptid, 1); |
1162 | } | |
1163 | ||
1164 | if (record_debug) | |
1165 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1166 | "Process record: record_full_wait " |
1167 | "issuing one more step in the " | |
1168 | "target beneath\n"); | |
6b84065d TT |
1169 | ops->beneath->to_resume (ops->beneath, ptid, step, |
1170 | GDB_SIGNAL_0); | |
85ad3aaf | 1171 | ops->beneath->to_commit_resume (ops->beneath); |
d02ed0bb MM |
1172 | continue; |
1173 | } | |
1174 | } | |
1175 | ||
1176 | /* The inferior is broken by a breakpoint or a signal. */ | |
1177 | break; | |
1178 | } | |
1179 | ||
1180 | return ret; | |
1181 | } | |
1182 | } | |
1183 | else | |
1184 | { | |
1185 | struct regcache *regcache = get_current_regcache (); | |
1186 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1187 | struct address_space *aspace = get_regcache_aspace (regcache); | |
1188 | int continue_flag = 1; | |
88d1aa9d MM |
1189 | int first_record_full_end = 1; |
1190 | struct cleanup *old_cleanups | |
1191 | = make_cleanup (record_full_wait_cleanups, 0); | |
d02ed0bb MM |
1192 | CORE_ADDR tmp_pc; |
1193 | ||
9e8915c6 | 1194 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
d02ed0bb MM |
1195 | status->kind = TARGET_WAITKIND_STOPPED; |
1196 | ||
1197 | /* Check breakpoint when forward execute. */ | |
1198 | if (execution_direction == EXEC_FORWARD) | |
1199 | { | |
1200 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1201 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1202 | &record_full_stop_reason)) | |
d02ed0bb | 1203 | { |
d02ed0bb MM |
1204 | if (record_debug) |
1205 | fprintf_unfiltered (gdb_stdlog, | |
1206 | "Process record: break at %s.\n", | |
1207 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb MM |
1208 | goto replay_out; |
1209 | } | |
1210 | } | |
1211 | ||
1212 | /* If GDB is in terminal_inferior mode, it will not get the signal. | |
1213 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior | |
1214 | mode, because inferior will not executed. | |
1215 | Then set it to terminal_ours to make GDB get the signal. */ | |
223ffa71 | 1216 | target_terminal::ours (); |
d02ed0bb | 1217 | |
88d1aa9d | 1218 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev |
d02ed0bb | 1219 | instruction. */ |
88d1aa9d MM |
1220 | if (execution_direction == EXEC_FORWARD && record_full_list->next) |
1221 | record_full_list = record_full_list->next; | |
d02ed0bb | 1222 | |
88d1aa9d | 1223 | /* Loop over the record_full_list, looking for the next place to |
d02ed0bb MM |
1224 | stop. */ |
1225 | do | |
1226 | { | |
1227 | /* Check for beginning and end of log. */ | |
1228 | if (execution_direction == EXEC_REVERSE | |
88d1aa9d | 1229 | && record_full_list == &record_full_first) |
d02ed0bb MM |
1230 | { |
1231 | /* Hit beginning of record log in reverse. */ | |
1232 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1233 | break; | |
1234 | } | |
88d1aa9d | 1235 | if (execution_direction != EXEC_REVERSE && !record_full_list->next) |
d02ed0bb MM |
1236 | { |
1237 | /* Hit end of record log going forward. */ | |
1238 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1239 | break; | |
1240 | } | |
1241 | ||
88d1aa9d | 1242 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 1243 | |
88d1aa9d | 1244 | if (record_full_list->type == record_full_end) |
d02ed0bb MM |
1245 | { |
1246 | if (record_debug > 1) | |
1247 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1248 | "Process record: record_full_end %s to " |
d02ed0bb | 1249 | "inferior.\n", |
88d1aa9d | 1250 | host_address_to_string (record_full_list)); |
d02ed0bb | 1251 | |
88d1aa9d | 1252 | if (first_record_full_end && execution_direction == EXEC_REVERSE) |
d02ed0bb | 1253 | { |
88d1aa9d MM |
1254 | /* When reverse excute, the first record_full_end is the |
1255 | part of current instruction. */ | |
1256 | first_record_full_end = 0; | |
d02ed0bb MM |
1257 | } |
1258 | else | |
1259 | { | |
88d1aa9d | 1260 | /* In EXEC_REVERSE mode, this is the record_full_end of prev |
d02ed0bb | 1261 | instruction. |
88d1aa9d MM |
1262 | In EXEC_FORWARD mode, this is the record_full_end of |
1263 | current instruction. */ | |
d02ed0bb | 1264 | /* step */ |
88d1aa9d | 1265 | if (record_full_resume_step) |
d02ed0bb MM |
1266 | { |
1267 | if (record_debug > 1) | |
1268 | fprintf_unfiltered (gdb_stdlog, | |
1269 | "Process record: step.\n"); | |
1270 | continue_flag = 0; | |
1271 | } | |
1272 | ||
1273 | /* check breakpoint */ | |
1274 | tmp_pc = regcache_read_pc (regcache); | |
9e8915c6 PA |
1275 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1276 | &record_full_stop_reason)) | |
d02ed0bb | 1277 | { |
d02ed0bb MM |
1278 | if (record_debug) |
1279 | fprintf_unfiltered (gdb_stdlog, | |
1280 | "Process record: break " | |
1281 | "at %s.\n", | |
1282 | paddress (gdbarch, tmp_pc)); | |
9e8915c6 | 1283 | |
d02ed0bb MM |
1284 | continue_flag = 0; |
1285 | } | |
1286 | ||
9e8915c6 | 1287 | if (record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT) |
d02ed0bb MM |
1288 | { |
1289 | if (record_debug) | |
1290 | fprintf_unfiltered (gdb_stdlog, | |
1291 | "Process record: hit hw " | |
1292 | "watchpoint.\n"); | |
1293 | continue_flag = 0; | |
1294 | } | |
1295 | /* Check target signal */ | |
88d1aa9d | 1296 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb MM |
1297 | /* FIXME: better way to check */ |
1298 | continue_flag = 0; | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | if (continue_flag) | |
1303 | { | |
1304 | if (execution_direction == EXEC_REVERSE) | |
1305 | { | |
88d1aa9d MM |
1306 | if (record_full_list->prev) |
1307 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
1308 | } |
1309 | else | |
1310 | { | |
88d1aa9d MM |
1311 | if (record_full_list->next) |
1312 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
1313 | } |
1314 | } | |
1315 | } | |
1316 | while (continue_flag); | |
1317 | ||
1318 | replay_out: | |
88d1aa9d | 1319 | if (record_full_get_sig) |
d02ed0bb | 1320 | status->value.sig = GDB_SIGNAL_INT; |
88d1aa9d | 1321 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) |
d02ed0bb | 1322 | /* FIXME: better way to check */ |
88d1aa9d | 1323 | status->value.sig = record_full_list->u.end.sigval; |
d02ed0bb MM |
1324 | else |
1325 | status->value.sig = GDB_SIGNAL_TRAP; | |
1326 | ||
1327 | discard_cleanups (old_cleanups); | |
1328 | } | |
1329 | ||
1330 | signal (SIGINT, handle_sigint); | |
1331 | ||
d02ed0bb MM |
1332 | return inferior_ptid; |
1333 | } | |
1334 | ||
1335 | static ptid_t | |
88d1aa9d MM |
1336 | record_full_wait (struct target_ops *ops, |
1337 | ptid_t ptid, struct target_waitstatus *status, | |
1338 | int options) | |
d02ed0bb MM |
1339 | { |
1340 | ptid_t return_ptid; | |
1341 | ||
88d1aa9d | 1342 | return_ptid = record_full_wait_1 (ops, ptid, status, options); |
d02ed0bb MM |
1343 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1344 | { | |
1345 | /* We're reporting a stop. Make sure any spurious | |
1346 | target_wait(WNOHANG) doesn't advance the target until the | |
1347 | core wants us resumed again. */ | |
88d1aa9d | 1348 | record_full_resumed = 0; |
d02ed0bb MM |
1349 | } |
1350 | return return_ptid; | |
1351 | } | |
1352 | ||
1353 | static int | |
6a109b6b | 1354 | record_full_stopped_by_watchpoint (struct target_ops *ops) |
d02ed0bb | 1355 | { |
88d1aa9d | 1356 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1357 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1358 | else |
6b84065d | 1359 | return ops->beneath->to_stopped_by_watchpoint (ops->beneath); |
d02ed0bb MM |
1360 | } |
1361 | ||
d02ed0bb | 1362 | static int |
88d1aa9d | 1363 | record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) |
d02ed0bb | 1364 | { |
88d1aa9d | 1365 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1366 | return 0; |
1367 | else | |
6b84065d | 1368 | return ops->beneath->to_stopped_data_address (ops->beneath, addr_p); |
d02ed0bb MM |
1369 | } |
1370 | ||
9e8915c6 PA |
1371 | /* The to_stopped_by_sw_breakpoint method of target record-full. */ |
1372 | ||
1373 | static int | |
1374 | record_full_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1375 | { | |
1376 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1377 | } | |
1378 | ||
1379 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1380 | record-full. */ | |
1381 | ||
1382 | static int | |
1383 | record_full_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
1384 | { | |
1385 | return 1; | |
1386 | } | |
1387 | ||
1388 | /* The to_stopped_by_hw_breakpoint method of target record-full. */ | |
1389 | ||
1390 | static int | |
1391 | record_full_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1392 | { | |
1393 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
1394 | } | |
1395 | ||
1396 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
1397 | record-full. */ | |
1398 | ||
1399 | static int | |
1400 | record_full_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
1401 | { | |
1402 | return 1; | |
1403 | } | |
1404 | ||
d02ed0bb MM |
1405 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1406 | ||
1407 | static void | |
88d1aa9d | 1408 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1409 | { |
88d1aa9d | 1410 | /* Check record_full_insn_num. */ |
651ce16a | 1411 | record_full_check_insn_num (); |
d02ed0bb | 1412 | |
88d1aa9d MM |
1413 | record_full_arch_list_head = NULL; |
1414 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1415 | |
1416 | if (regnum < 0) | |
1417 | { | |
1418 | int i; | |
1419 | ||
1420 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) | |
1421 | { | |
25ea693b | 1422 | if (record_full_arch_list_add_reg (regcache, i)) |
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 | } | |
1427 | } | |
1428 | } | |
1429 | else | |
1430 | { | |
25ea693b | 1431 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1432 | { |
88d1aa9d | 1433 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1434 | error (_("Process record: failed to record execution log.")); |
1435 | } | |
1436 | } | |
25ea693b | 1437 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1438 | { |
88d1aa9d | 1439 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1440 | error (_("Process record: failed to record execution log.")); |
1441 | } | |
88d1aa9d MM |
1442 | record_full_list->next = record_full_arch_list_head; |
1443 | record_full_arch_list_head->prev = record_full_list; | |
1444 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1445 | |
7ee70bf5 | 1446 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1447 | record_full_list_release_first (); |
d02ed0bb | 1448 | else |
88d1aa9d | 1449 | record_full_insn_num++; |
d02ed0bb MM |
1450 | } |
1451 | ||
1452 | /* "to_store_registers" method for process record target. */ | |
1453 | ||
1454 | static void | |
88d1aa9d MM |
1455 | record_full_store_registers (struct target_ops *ops, |
1456 | struct regcache *regcache, | |
1457 | int regno) | |
d02ed0bb | 1458 | { |
88d1aa9d | 1459 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1460 | { |
88d1aa9d | 1461 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1462 | { |
1463 | int n; | |
1464 | ||
1465 | /* Let user choose if he wants to write register or not. */ | |
1466 | if (regno < 0) | |
1467 | n = | |
1468 | query (_("Because GDB is in replay mode, changing the " | |
1469 | "value of a register will make the execution " | |
1470 | "log unusable from this point onward. " | |
1471 | "Change all registers?")); | |
1472 | else | |
1473 | n = | |
1474 | query (_("Because GDB is in replay mode, changing the value " | |
1475 | "of a register will make the execution log unusable " | |
1476 | "from this point onward. Change register %s?"), | |
1477 | gdbarch_register_name (get_regcache_arch (regcache), | |
1478 | regno)); | |
1479 | ||
1480 | if (!n) | |
1481 | { | |
1482 | /* Invalidate the value of regcache that was set in function | |
1483 | "regcache_raw_write". */ | |
1484 | if (regno < 0) | |
1485 | { | |
1486 | int i; | |
1487 | ||
1488 | for (i = 0; | |
1489 | i < gdbarch_num_regs (get_regcache_arch (regcache)); | |
1490 | i++) | |
1491 | regcache_invalidate (regcache, i); | |
1492 | } | |
1493 | else | |
1494 | regcache_invalidate (regcache, regno); | |
1495 | ||
1496 | error (_("Process record canceled the operation.")); | |
1497 | } | |
1498 | ||
1499 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1500 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1501 | } |
1502 | ||
88d1aa9d | 1503 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1504 | } |
6b84065d | 1505 | ops->beneath->to_store_registers (ops->beneath, regcache, regno); |
d02ed0bb MM |
1506 | } |
1507 | ||
88d1aa9d MM |
1508 | /* "to_xfer_partial" method. Behavior is conditional on |
1509 | RECORD_FULL_IS_REPLAY. | |
d02ed0bb MM |
1510 | In replay mode, we cannot write memory unles we are willing to |
1511 | invalidate the record/replay log from this point forward. */ | |
1512 | ||
9b409511 | 1513 | static enum target_xfer_status |
88d1aa9d MM |
1514 | record_full_xfer_partial (struct target_ops *ops, enum target_object object, |
1515 | const char *annex, gdb_byte *readbuf, | |
1516 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1517 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb | 1518 | { |
88d1aa9d | 1519 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1520 | && (object == TARGET_OBJECT_MEMORY |
1521 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1522 | { | |
88d1aa9d | 1523 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1524 | { |
1525 | /* Let user choose if he wants to write memory or not. */ | |
1526 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
1527 | "will make the execution log unusable from this " | |
1528 | "point onward. Write memory at address %s?"), | |
1529 | paddress (target_gdbarch (), offset))) | |
1530 | error (_("Process record canceled the operation.")); | |
1531 | ||
1532 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1533 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1534 | } |
1535 | ||
88d1aa9d | 1536 | /* Check record_full_insn_num */ |
651ce16a | 1537 | record_full_check_insn_num (); |
d02ed0bb MM |
1538 | |
1539 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1540 | record_full_arch_list_head = NULL; |
1541 | record_full_arch_list_tail = NULL; | |
25ea693b | 1542 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1543 | { |
88d1aa9d | 1544 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1545 | if (record_debug) |
1546 | fprintf_unfiltered (gdb_stdlog, | |
1547 | "Process record: failed to record " | |
1548 | "execution log."); | |
2ed4b548 | 1549 | return TARGET_XFER_E_IO; |
d02ed0bb | 1550 | } |
25ea693b | 1551 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1552 | { |
88d1aa9d | 1553 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1554 | if (record_debug) |
1555 | fprintf_unfiltered (gdb_stdlog, | |
1556 | "Process record: failed to record " | |
1557 | "execution log."); | |
2ed4b548 | 1558 | return TARGET_XFER_E_IO; |
d02ed0bb | 1559 | } |
88d1aa9d MM |
1560 | record_full_list->next = record_full_arch_list_head; |
1561 | record_full_arch_list_head->prev = record_full_list; | |
1562 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1563 | |
7ee70bf5 | 1564 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1565 | record_full_list_release_first (); |
d02ed0bb | 1566 | else |
88d1aa9d | 1567 | record_full_insn_num++; |
d02ed0bb MM |
1568 | } |
1569 | ||
6b84065d TT |
1570 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
1571 | readbuf, writebuf, offset, | |
1572 | len, xfered_len); | |
d02ed0bb MM |
1573 | } |
1574 | ||
1575 | /* This structure represents a breakpoint inserted while the record | |
1576 | target is active. We use this to know when to install/remove | |
1577 | breakpoints in/from the target beneath. For example, a breakpoint | |
1578 | may be inserted while recording, but removed when not replaying nor | |
1579 | recording. In that case, the breakpoint had not been inserted on | |
1580 | the target beneath, so we should not try to remove it there. */ | |
1581 | ||
88d1aa9d | 1582 | struct record_full_breakpoint |
d02ed0bb MM |
1583 | { |
1584 | /* The address and address space the breakpoint was set at. */ | |
1585 | struct address_space *address_space; | |
1586 | CORE_ADDR addr; | |
1587 | ||
1588 | /* True when the breakpoint has been also installed in the target | |
1589 | beneath. This will be false for breakpoints set during replay or | |
1590 | when recording. */ | |
1591 | int in_target_beneath; | |
1592 | }; | |
1593 | ||
88d1aa9d MM |
1594 | typedef struct record_full_breakpoint *record_full_breakpoint_p; |
1595 | DEF_VEC_P(record_full_breakpoint_p); | |
d02ed0bb MM |
1596 | |
1597 | /* The list of breakpoints inserted while the record target is | |
1598 | active. */ | |
88d1aa9d | 1599 | VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL; |
d02ed0bb MM |
1600 | |
1601 | static void | |
88d1aa9d | 1602 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1603 | { |
1604 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1605 | return; | |
1606 | ||
1607 | if (loc->inserted) | |
1608 | { | |
88d1aa9d | 1609 | struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1610 | |
1611 | bp->addr = loc->target_info.placed_address; | |
1612 | bp->address_space = loc->target_info.placed_address_space; | |
1613 | ||
1614 | bp->in_target_beneath = 1; | |
1615 | ||
88d1aa9d | 1616 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1617 | } |
1618 | } | |
1619 | ||
88d1aa9d | 1620 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1621 | |
1622 | static void | |
88d1aa9d | 1623 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1624 | { |
88d1aa9d | 1625 | VEC_free (record_full_breakpoint_p, record_full_breakpoints); |
d02ed0bb | 1626 | |
88d1aa9d | 1627 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1628 | } |
1629 | ||
88d1aa9d | 1630 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1631 | insert or remove breakpoints in the real target when replaying, nor |
1632 | when recording. */ | |
1633 | ||
1634 | static int | |
3db08215 MM |
1635 | record_full_insert_breakpoint (struct target_ops *ops, |
1636 | struct gdbarch *gdbarch, | |
88d1aa9d | 1637 | struct bp_target_info *bp_tgt) |
d02ed0bb | 1638 | { |
88d1aa9d | 1639 | struct record_full_breakpoint *bp; |
d02ed0bb | 1640 | int in_target_beneath = 0; |
e390720b | 1641 | int ix; |
d02ed0bb | 1642 | |
88d1aa9d | 1643 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1644 | { |
1645 | /* When recording, we currently always single-step, so we don't | |
1646 | really need to install regular breakpoints in the inferior. | |
1647 | However, we do have to insert software single-step | |
1648 | breakpoints, in case the target can't hardware step. To keep | |
f99bd5f2 | 1649 | things simple, we always insert. */ |
d02ed0bb MM |
1650 | int ret; |
1651 | ||
07036511 TT |
1652 | scoped_restore restore_operation_disable |
1653 | = record_full_gdb_operation_disable_set (); | |
6b84065d | 1654 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
d02ed0bb MM |
1655 | |
1656 | if (ret != 0) | |
1657 | return ret; | |
1658 | ||
1659 | in_target_beneath = 1; | |
1660 | } | |
1661 | ||
e390720b YQ |
1662 | /* Use the existing entries if found in order to avoid duplication |
1663 | in record_full_breakpoints. */ | |
1664 | ||
1665 | for (ix = 0; | |
1666 | VEC_iterate (record_full_breakpoint_p, | |
1667 | record_full_breakpoints, ix, bp); | |
1668 | ++ix) | |
1669 | { | |
1670 | if (bp->addr == bp_tgt->placed_address | |
1671 | && bp->address_space == bp_tgt->placed_address_space) | |
1672 | { | |
1673 | gdb_assert (bp->in_target_beneath == in_target_beneath); | |
1674 | return 0; | |
1675 | } | |
1676 | } | |
1677 | ||
88d1aa9d | 1678 | bp = XNEW (struct record_full_breakpoint); |
d02ed0bb MM |
1679 | bp->addr = bp_tgt->placed_address; |
1680 | bp->address_space = bp_tgt->placed_address_space; | |
1681 | bp->in_target_beneath = in_target_beneath; | |
88d1aa9d | 1682 | VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp); |
d02ed0bb MM |
1683 | return 0; |
1684 | } | |
1685 | ||
1686 | /* "to_remove_breakpoint" method for process record target. */ | |
1687 | ||
1688 | static int | |
3db08215 MM |
1689 | record_full_remove_breakpoint (struct target_ops *ops, |
1690 | struct gdbarch *gdbarch, | |
73971819 PA |
1691 | struct bp_target_info *bp_tgt, |
1692 | enum remove_bp_reason reason) | |
d02ed0bb | 1693 | { |
88d1aa9d | 1694 | struct record_full_breakpoint *bp; |
d02ed0bb MM |
1695 | int ix; |
1696 | ||
1697 | for (ix = 0; | |
88d1aa9d MM |
1698 | VEC_iterate (record_full_breakpoint_p, |
1699 | record_full_breakpoints, ix, bp); | |
d02ed0bb MM |
1700 | ++ix) |
1701 | { | |
1702 | if (bp->addr == bp_tgt->placed_address | |
1703 | && bp->address_space == bp_tgt->placed_address_space) | |
1704 | { | |
1705 | if (bp->in_target_beneath) | |
1706 | { | |
d02ed0bb MM |
1707 | int ret; |
1708 | ||
07036511 TT |
1709 | scoped_restore restore_operation_disable |
1710 | = record_full_gdb_operation_disable_set (); | |
6b84065d | 1711 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, |
73971819 | 1712 | bp_tgt, reason); |
d02ed0bb MM |
1713 | if (ret != 0) |
1714 | return ret; | |
1715 | } | |
1716 | ||
01d3dedf PA |
1717 | if (reason == REMOVE_BREAKPOINT) |
1718 | { | |
1719 | VEC_unordered_remove (record_full_breakpoint_p, | |
1720 | record_full_breakpoints, ix); | |
1721 | } | |
d02ed0bb MM |
1722 | return 0; |
1723 | } | |
1724 | } | |
1725 | ||
1726 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1727 | } | |
1728 | ||
1729 | /* "to_can_execute_reverse" method for process record target. */ | |
1730 | ||
1731 | static int | |
19db3e69 | 1732 | record_full_can_execute_reverse (struct target_ops *self) |
d02ed0bb MM |
1733 | { |
1734 | return 1; | |
1735 | } | |
1736 | ||
1737 | /* "to_get_bookmark" method for process record and prec over core. */ | |
1738 | ||
1739 | static gdb_byte * | |
c2bcbb1d TT |
1740 | record_full_get_bookmark (struct target_ops *self, const char *args, |
1741 | int from_tty) | |
d02ed0bb | 1742 | { |
0f928d68 | 1743 | char *ret = NULL; |
d02ed0bb MM |
1744 | |
1745 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1746 | if (record_full_list && record_full_list->type == record_full_end) |
1747 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1748 | |
1749 | if (record_debug) | |
1750 | { | |
1751 | if (ret) | |
1752 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1753 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1754 | else |
1755 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1756 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1757 | } |
0f928d68 | 1758 | return (gdb_byte *) ret; |
d02ed0bb MM |
1759 | } |
1760 | ||
1761 | /* "to_goto_bookmark" method for process record and prec over core. */ | |
1762 | ||
1763 | static void | |
3c80fb48 | 1764 | record_full_goto_bookmark (struct target_ops *self, |
c2bcbb1d | 1765 | const gdb_byte *raw_bookmark, int from_tty) |
d02ed0bb | 1766 | { |
c2bcbb1d TT |
1767 | const char *bookmark = (const char *) raw_bookmark; |
1768 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); | |
0f928d68 | 1769 | |
d02ed0bb MM |
1770 | if (record_debug) |
1771 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1772 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb MM |
1773 | |
1774 | if (bookmark[0] == '\'' || bookmark[0] == '\"') | |
1775 | { | |
c2bcbb1d TT |
1776 | char *copy; |
1777 | ||
d02ed0bb MM |
1778 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) |
1779 | error (_("Unbalanced quotes: %s"), bookmark); | |
1780 | ||
c2bcbb1d TT |
1781 | |
1782 | copy = savestring (bookmark + 1, strlen (bookmark) - 2); | |
1783 | make_cleanup (xfree, copy); | |
1784 | bookmark = copy; | |
d02ed0bb MM |
1785 | } |
1786 | ||
c2bcbb1d TT |
1787 | record_goto (bookmark); |
1788 | ||
1789 | do_cleanups (cleanup); | |
d02ed0bb MM |
1790 | } |
1791 | ||
d02ed0bb | 1792 | static enum exec_direction_kind |
4c612759 | 1793 | record_full_execution_direction (struct target_ops *self) |
d02ed0bb | 1794 | { |
88d1aa9d | 1795 | return record_full_execution_dir; |
d02ed0bb MM |
1796 | } |
1797 | ||
b158a20f TW |
1798 | /* The to_record_method method of target record-full. */ |
1799 | ||
1800 | enum record_method | |
1801 | record_full_record_method (struct target_ops *self, ptid_t ptid) | |
1802 | { | |
1803 | return RECORD_METHOD_FULL; | |
1804 | } | |
1805 | ||
d02ed0bb | 1806 | static void |
630d6a4a | 1807 | record_full_info (struct target_ops *self) |
d02ed0bb | 1808 | { |
88d1aa9d | 1809 | struct record_full_entry *p; |
d02ed0bb | 1810 | |
88d1aa9d | 1811 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1812 | printf_filtered (_("Replay mode:\n")); |
1813 | else | |
1814 | printf_filtered (_("Record mode:\n")); | |
1815 | ||
1816 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1817 | for (p = record_full_first.next; |
1818 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1819 | p = p->next) |
1820 | ; | |
1821 | ||
1822 | /* Do we have a log at all? */ | |
88d1aa9d | 1823 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1824 | { |
1825 | /* Display instruction number for first instruction in the log. */ | |
1826 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1827 | pulongest (p->u.end.insn_num)); | |
1828 | ||
1829 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1830 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1831 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1832 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1833 | |
1834 | /* Display instruction number for last instruction in the log. */ | |
1835 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1836 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1837 | |
1838 | /* Display log count. */ | |
7ee70bf5 | 1839 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1840 | record_full_insn_num); |
d02ed0bb MM |
1841 | } |
1842 | else | |
1843 | printf_filtered (_("No instructions have been logged.\n")); | |
1844 | ||
1845 | /* Display max log size. */ | |
7ee70bf5 | 1846 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1847 | record_full_insn_max_num); |
d02ed0bb MM |
1848 | } |
1849 | ||
1850 | /* The "to_record_delete" target method. */ | |
1851 | ||
1852 | static void | |
d1b55219 | 1853 | record_full_delete (struct target_ops *self) |
d02ed0bb | 1854 | { |
88d1aa9d | 1855 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1856 | } |
1857 | ||
1858 | /* The "to_record_is_replaying" target method. */ | |
1859 | ||
1860 | static int | |
a52eab48 | 1861 | record_full_is_replaying (struct target_ops *self, ptid_t ptid) |
d02ed0bb | 1862 | { |
88d1aa9d | 1863 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1864 | } |
1865 | ||
7ff27e9b MM |
1866 | /* The "to_record_will_replay" target method. */ |
1867 | ||
1868 | static int | |
1869 | record_full_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1870 | { | |
1871 | /* We can currently only record when executing forwards. Should we be able | |
1872 | to record when executing backwards on targets that support reverse | |
1873 | execution, this needs to be changed. */ | |
1874 | ||
1875 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1876 | } | |
1877 | ||
d02ed0bb MM |
1878 | /* Go to a specific entry. */ |
1879 | ||
1880 | static void | |
88d1aa9d | 1881 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1882 | { |
1883 | if (p == NULL) | |
1884 | error (_("Target insn not found.")); | |
88d1aa9d | 1885 | else if (p == record_full_list) |
d02ed0bb | 1886 | error (_("Already at target insn.")); |
88d1aa9d | 1887 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1888 | { |
1889 | printf_filtered (_("Go forward to insn number %s\n"), | |
1890 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1891 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
1892 | } |
1893 | else | |
1894 | { | |
1895 | printf_filtered (_("Go backward to insn number %s\n"), | |
1896 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1897 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
1898 | } |
1899 | ||
1900 | registers_changed (); | |
1901 | reinit_frame_cache (); | |
485668e5 | 1902 | stop_pc = regcache_read_pc (get_current_regcache ()); |
08d72866 | 1903 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
1904 | } |
1905 | ||
1906 | /* The "to_goto_record_begin" target method. */ | |
1907 | ||
1908 | static void | |
08475817 | 1909 | record_full_goto_begin (struct target_ops *self) |
d02ed0bb | 1910 | { |
88d1aa9d | 1911 | struct record_full_entry *p = NULL; |
d02ed0bb | 1912 | |
88d1aa9d MM |
1913 | for (p = &record_full_first; p != NULL; p = p->next) |
1914 | if (p->type == record_full_end) | |
d02ed0bb MM |
1915 | break; |
1916 | ||
88d1aa9d | 1917 | record_full_goto_entry (p); |
d02ed0bb MM |
1918 | } |
1919 | ||
1920 | /* The "to_goto_record_end" target method. */ | |
1921 | ||
1922 | static void | |
307a1b91 | 1923 | record_full_goto_end (struct target_ops *self) |
d02ed0bb | 1924 | { |
88d1aa9d | 1925 | struct record_full_entry *p = NULL; |
d02ed0bb | 1926 | |
88d1aa9d | 1927 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
1928 | ; |
1929 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 1930 | if (p->type == record_full_end) |
d02ed0bb MM |
1931 | break; |
1932 | ||
88d1aa9d | 1933 | record_full_goto_entry (p); |
d02ed0bb MM |
1934 | } |
1935 | ||
1936 | /* The "to_goto_record" target method. */ | |
1937 | ||
1938 | static void | |
606183ac | 1939 | record_full_goto (struct target_ops *self, ULONGEST target_insn) |
d02ed0bb | 1940 | { |
88d1aa9d | 1941 | struct record_full_entry *p = NULL; |
d02ed0bb | 1942 | |
88d1aa9d MM |
1943 | for (p = &record_full_first; p != NULL; p = p->next) |
1944 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
1945 | break; |
1946 | ||
88d1aa9d | 1947 | record_full_goto_entry (p); |
d02ed0bb MM |
1948 | } |
1949 | ||
797094dd MM |
1950 | /* The "to_record_stop_replaying" target method. */ |
1951 | ||
1952 | static void | |
1953 | record_full_stop_replaying (struct target_ops *self) | |
1954 | { | |
1955 | record_full_goto_end (self); | |
1956 | } | |
1957 | ||
d02ed0bb | 1958 | static void |
88d1aa9d | 1959 | init_record_full_ops (void) |
d02ed0bb | 1960 | { |
88d1aa9d MM |
1961 | record_full_ops.to_shortname = "record-full"; |
1962 | record_full_ops.to_longname = "Process record and replay target"; | |
1963 | record_full_ops.to_doc = | |
d02ed0bb | 1964 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
1965 | record_full_ops.to_open = record_full_open; |
1966 | record_full_ops.to_close = record_full_close; | |
b7d2e916 | 1967 | record_full_ops.to_async = record_full_async; |
88d1aa9d | 1968 | record_full_ops.to_resume = record_full_resume; |
85ad3aaf | 1969 | record_full_ops.to_commit_resume = record_full_commit_resume; |
88d1aa9d | 1970 | record_full_ops.to_wait = record_full_wait; |
7c1687a9 MM |
1971 | record_full_ops.to_disconnect = record_disconnect; |
1972 | record_full_ops.to_detach = record_detach; | |
1973 | record_full_ops.to_mourn_inferior = record_mourn_inferior; | |
1974 | record_full_ops.to_kill = record_kill; | |
88d1aa9d MM |
1975 | record_full_ops.to_store_registers = record_full_store_registers; |
1976 | record_full_ops.to_xfer_partial = record_full_xfer_partial; | |
1977 | record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint; | |
1978 | record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint; | |
1979 | record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint; | |
1980 | record_full_ops.to_stopped_data_address = record_full_stopped_data_address; | |
9e8915c6 PA |
1981 | record_full_ops.to_stopped_by_sw_breakpoint |
1982 | = record_full_stopped_by_sw_breakpoint; | |
1983 | record_full_ops.to_supports_stopped_by_sw_breakpoint | |
1984 | = record_full_supports_stopped_by_sw_breakpoint; | |
1985 | record_full_ops.to_stopped_by_hw_breakpoint | |
1986 | = record_full_stopped_by_hw_breakpoint; | |
1987 | record_full_ops.to_supports_stopped_by_hw_breakpoint | |
1988 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
1989 | record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse; |
1990 | record_full_ops.to_stratum = record_stratum; | |
d02ed0bb | 1991 | /* Add bookmark target methods. */ |
88d1aa9d MM |
1992 | record_full_ops.to_get_bookmark = record_full_get_bookmark; |
1993 | record_full_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d | 1994 | record_full_ops.to_execution_direction = record_full_execution_direction; |
b158a20f | 1995 | record_full_ops.to_record_method = record_full_record_method; |
88d1aa9d MM |
1996 | record_full_ops.to_info_record = record_full_info; |
1997 | record_full_ops.to_save_record = record_full_save; | |
1998 | record_full_ops.to_delete_record = record_full_delete; | |
1999 | record_full_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 2000 | record_full_ops.to_record_will_replay = record_full_will_replay; |
797094dd | 2001 | record_full_ops.to_record_stop_replaying = record_full_stop_replaying; |
88d1aa9d MM |
2002 | record_full_ops.to_goto_record_begin = record_full_goto_begin; |
2003 | record_full_ops.to_goto_record_end = record_full_goto_end; | |
2004 | record_full_ops.to_goto_record = record_full_goto; | |
2005 | record_full_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2006 | } |
2007 | ||
2008 | /* "to_resume" method for prec over corefile. */ | |
2009 | ||
2010 | static void | |
88d1aa9d MM |
2011 | record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step, |
2012 | enum gdb_signal signal) | |
d02ed0bb | 2013 | { |
88d1aa9d MM |
2014 | record_full_resume_step = step; |
2015 | record_full_resumed = 1; | |
2016 | record_full_execution_dir = execution_direction; | |
d02ed0bb MM |
2017 | |
2018 | /* We are about to start executing the inferior (or simulate it), | |
2019 | let's register it with the event loop. */ | |
2020 | if (target_can_async_p ()) | |
6a3753b3 | 2021 | target_async (1); |
d02ed0bb MM |
2022 | } |
2023 | ||
2024 | /* "to_kill" method for prec over corefile. */ | |
2025 | ||
2026 | static void | |
88d1aa9d | 2027 | record_full_core_kill (struct target_ops *ops) |
d02ed0bb MM |
2028 | { |
2029 | if (record_debug) | |
88d1aa9d | 2030 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2031 | |
88d1aa9d | 2032 | unpush_target (&record_full_core_ops); |
d02ed0bb MM |
2033 | } |
2034 | ||
2035 | /* "to_fetch_registers" method for prec over corefile. */ | |
2036 | ||
2037 | static void | |
88d1aa9d MM |
2038 | record_full_core_fetch_registers (struct target_ops *ops, |
2039 | struct regcache *regcache, | |
2040 | int regno) | |
d02ed0bb MM |
2041 | { |
2042 | if (regno < 0) | |
2043 | { | |
2044 | int num = gdbarch_num_regs (get_regcache_arch (regcache)); | |
2045 | int i; | |
2046 | ||
2047 | for (i = 0; i < num; i ++) | |
2048 | regcache_raw_supply (regcache, i, | |
88d1aa9d | 2049 | record_full_core_regbuf + MAX_REGISTER_SIZE * i); |
d02ed0bb MM |
2050 | } |
2051 | else | |
2052 | regcache_raw_supply (regcache, regno, | |
88d1aa9d | 2053 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2054 | } |
2055 | ||
2056 | /* "to_prepare_to_store" method for prec over corefile. */ | |
2057 | ||
2058 | static void | |
f32dbf8c MM |
2059 | record_full_core_prepare_to_store (struct target_ops *self, |
2060 | struct regcache *regcache) | |
d02ed0bb MM |
2061 | { |
2062 | } | |
2063 | ||
2064 | /* "to_store_registers" method for prec over corefile. */ | |
2065 | ||
2066 | static void | |
88d1aa9d | 2067 | record_full_core_store_registers (struct target_ops *ops, |
d02ed0bb MM |
2068 | struct regcache *regcache, |
2069 | int regno) | |
2070 | { | |
88d1aa9d | 2071 | if (record_full_gdb_operation_disable) |
d02ed0bb | 2072 | regcache_raw_collect (regcache, regno, |
88d1aa9d | 2073 | record_full_core_regbuf + MAX_REGISTER_SIZE * regno); |
d02ed0bb MM |
2074 | else |
2075 | error (_("You can't do that without a process to debug.")); | |
2076 | } | |
2077 | ||
2078 | /* "to_xfer_partial" method for prec over corefile. */ | |
2079 | ||
9b409511 | 2080 | static enum target_xfer_status |
88d1aa9d MM |
2081 | record_full_core_xfer_partial (struct target_ops *ops, |
2082 | enum target_object object, | |
2083 | const char *annex, gdb_byte *readbuf, | |
2084 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 2085 | ULONGEST len, ULONGEST *xfered_len) |
d02ed0bb MM |
2086 | { |
2087 | if (object == TARGET_OBJECT_MEMORY) | |
2088 | { | |
88d1aa9d | 2089 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb MM |
2090 | { |
2091 | struct target_section *p; | |
2092 | ||
88d1aa9d | 2093 | for (p = record_full_core_start; p < record_full_core_end; p++) |
d02ed0bb MM |
2094 | { |
2095 | if (offset >= p->addr) | |
2096 | { | |
88d1aa9d | 2097 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2098 | ULONGEST sec_offset; |
2099 | ||
2100 | if (offset >= p->endaddr) | |
2101 | continue; | |
2102 | ||
2103 | if (offset + len > p->endaddr) | |
2104 | len = p->endaddr - offset; | |
2105 | ||
2106 | sec_offset = offset - p->addr; | |
2107 | ||
2108 | /* Read readbuf or write writebuf p, offset, len. */ | |
2109 | /* Check flags. */ | |
2110 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2111 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2112 | { | |
2113 | if (readbuf) | |
2114 | memset (readbuf, 0, len); | |
9b409511 YQ |
2115 | |
2116 | *xfered_len = len; | |
2117 | return TARGET_XFER_OK; | |
d02ed0bb | 2118 | } |
88d1aa9d MM |
2119 | /* Get record_full_core_buf_entry. */ |
2120 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb MM |
2121 | entry = entry->prev) |
2122 | if (entry->p == p) | |
2123 | break; | |
2124 | if (writebuf) | |
2125 | { | |
2126 | if (!entry) | |
2127 | { | |
2128 | /* Add a new entry. */ | |
8d749320 | 2129 | entry = XNEW (struct record_full_core_buf_entry); |
d02ed0bb | 2130 | entry->p = p; |
2b2848e2 DE |
2131 | if (!bfd_malloc_and_get_section |
2132 | (p->the_bfd_section->owner, | |
2133 | p->the_bfd_section, | |
2134 | &entry->buf)) | |
d02ed0bb MM |
2135 | { |
2136 | xfree (entry); | |
9b409511 | 2137 | return TARGET_XFER_EOF; |
d02ed0bb | 2138 | } |
88d1aa9d MM |
2139 | entry->prev = record_full_core_buf_list; |
2140 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2141 | } |
2142 | ||
2143 | memcpy (entry->buf + sec_offset, writebuf, | |
2144 | (size_t) len); | |
2145 | } | |
2146 | else | |
2147 | { | |
2148 | if (!entry) | |
6b84065d TT |
2149 | return ops->beneath->to_xfer_partial (ops->beneath, |
2150 | object, annex, | |
2151 | readbuf, writebuf, | |
2152 | offset, len, | |
2153 | xfered_len); | |
d02ed0bb MM |
2154 | |
2155 | memcpy (readbuf, entry->buf + sec_offset, | |
2156 | (size_t) len); | |
2157 | } | |
2158 | ||
9b409511 YQ |
2159 | *xfered_len = len; |
2160 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2161 | } |
2162 | } | |
2163 | ||
2ed4b548 | 2164 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2165 | } |
2166 | else | |
2167 | error (_("You can't do that without a process to debug.")); | |
2168 | } | |
2169 | ||
6b84065d TT |
2170 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2171 | readbuf, writebuf, offset, len, | |
2172 | xfered_len); | |
d02ed0bb MM |
2173 | } |
2174 | ||
2175 | /* "to_insert_breakpoint" method for prec over corefile. */ | |
2176 | ||
2177 | static int | |
3db08215 MM |
2178 | record_full_core_insert_breakpoint (struct target_ops *ops, |
2179 | struct gdbarch *gdbarch, | |
88d1aa9d | 2180 | struct bp_target_info *bp_tgt) |
d02ed0bb MM |
2181 | { |
2182 | return 0; | |
2183 | } | |
2184 | ||
2185 | /* "to_remove_breakpoint" method for prec over corefile. */ | |
2186 | ||
2187 | static int | |
3db08215 MM |
2188 | record_full_core_remove_breakpoint (struct target_ops *ops, |
2189 | struct gdbarch *gdbarch, | |
73971819 PA |
2190 | struct bp_target_info *bp_tgt, |
2191 | enum remove_bp_reason reason) | |
d02ed0bb MM |
2192 | { |
2193 | return 0; | |
2194 | } | |
2195 | ||
2196 | /* "to_has_execution" method for prec over corefile. */ | |
2197 | ||
2198 | static int | |
88d1aa9d | 2199 | record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid) |
d02ed0bb MM |
2200 | { |
2201 | return 1; | |
2202 | } | |
2203 | ||
2204 | static void | |
88d1aa9d | 2205 | init_record_full_core_ops (void) |
d02ed0bb | 2206 | { |
88d1aa9d MM |
2207 | record_full_core_ops.to_shortname = "record-core"; |
2208 | record_full_core_ops.to_longname = "Process record and replay target"; | |
2209 | record_full_core_ops.to_doc = | |
d02ed0bb | 2210 | "Log program while executing and replay execution from log."; |
88d1aa9d MM |
2211 | record_full_core_ops.to_open = record_full_open; |
2212 | record_full_core_ops.to_close = record_full_close; | |
b7d2e916 | 2213 | record_full_core_ops.to_async = record_full_async; |
88d1aa9d MM |
2214 | record_full_core_ops.to_resume = record_full_core_resume; |
2215 | record_full_core_ops.to_wait = record_full_wait; | |
2216 | record_full_core_ops.to_kill = record_full_core_kill; | |
2217 | record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers; | |
2218 | record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store; | |
2219 | record_full_core_ops.to_store_registers = record_full_core_store_registers; | |
2220 | record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial; | |
2221 | record_full_core_ops.to_insert_breakpoint | |
2222 | = record_full_core_insert_breakpoint; | |
2223 | record_full_core_ops.to_remove_breakpoint | |
2224 | = record_full_core_remove_breakpoint; | |
2225 | record_full_core_ops.to_stopped_by_watchpoint | |
2226 | = record_full_stopped_by_watchpoint; | |
2227 | record_full_core_ops.to_stopped_data_address | |
2228 | = record_full_stopped_data_address; | |
9e8915c6 PA |
2229 | record_full_core_ops.to_stopped_by_sw_breakpoint |
2230 | = record_full_stopped_by_sw_breakpoint; | |
2231 | record_full_core_ops.to_supports_stopped_by_sw_breakpoint | |
2232 | = record_full_supports_stopped_by_sw_breakpoint; | |
2233 | record_full_core_ops.to_stopped_by_hw_breakpoint | |
2234 | = record_full_stopped_by_hw_breakpoint; | |
2235 | record_full_core_ops.to_supports_stopped_by_hw_breakpoint | |
2236 | = record_full_supports_stopped_by_hw_breakpoint; | |
88d1aa9d MM |
2237 | record_full_core_ops.to_can_execute_reverse |
2238 | = record_full_can_execute_reverse; | |
2239 | record_full_core_ops.to_has_execution = record_full_core_has_execution; | |
2240 | record_full_core_ops.to_stratum = record_stratum; | |
d02ed0bb | 2241 | /* Add bookmark target methods. */ |
88d1aa9d MM |
2242 | record_full_core_ops.to_get_bookmark = record_full_get_bookmark; |
2243 | record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark; | |
88d1aa9d MM |
2244 | record_full_core_ops.to_execution_direction |
2245 | = record_full_execution_direction; | |
b158a20f | 2246 | record_full_core_ops.to_record_method = record_full_record_method; |
88d1aa9d MM |
2247 | record_full_core_ops.to_info_record = record_full_info; |
2248 | record_full_core_ops.to_delete_record = record_full_delete; | |
2249 | record_full_core_ops.to_record_is_replaying = record_full_is_replaying; | |
7ff27e9b | 2250 | record_full_core_ops.to_record_will_replay = record_full_will_replay; |
88d1aa9d MM |
2251 | record_full_core_ops.to_goto_record_begin = record_full_goto_begin; |
2252 | record_full_core_ops.to_goto_record_end = record_full_goto_end; | |
2253 | record_full_core_ops.to_goto_record = record_full_goto; | |
2254 | record_full_core_ops.to_magic = OPS_MAGIC; | |
d02ed0bb MM |
2255 | } |
2256 | ||
2257 | /* Record log save-file format | |
2258 | Version 1 (never released) | |
2259 | ||
2260 | Header: | |
2261 | 4 bytes: magic number htonl(0x20090829). | |
2262 | NOTE: be sure to change whenever this file format changes! | |
2263 | ||
2264 | Records: | |
88d1aa9d MM |
2265 | record_full_end: |
2266 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2267 | record_full_reg: | |
2268 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2269 | 8 bytes: register id (network byte order). |
2270 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2271 | record_full_mem: |
2272 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2273 | 8 bytes: memory length (network byte order). |
2274 | 8 bytes: memory address (network byte order). | |
2275 | n bytes: memory value (n == memory length). | |
2276 | ||
2277 | Version 2 | |
2278 | 4 bytes: magic number netorder32(0x20091016). | |
2279 | NOTE: be sure to change whenever this file format changes! | |
2280 | ||
2281 | Records: | |
88d1aa9d MM |
2282 | record_full_end: |
2283 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2284 | 4 bytes: signal |
2285 | 4 bytes: instruction count | |
88d1aa9d MM |
2286 | record_full_reg: |
2287 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2288 | 4 bytes: register id (network byte order). |
2289 | n bytes: register value (n == actual register size). | |
2290 | (eg. 4 bytes for x86 general registers). | |
88d1aa9d MM |
2291 | record_full_mem: |
2292 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2293 | 4 bytes: memory length (network byte order). |
2294 | 8 bytes: memory address (network byte order). | |
2295 | n bytes: memory value (n == memory length). | |
2296 | ||
2297 | */ | |
2298 | ||
2299 | /* bfdcore_read -- read bytes from a core file section. */ | |
2300 | ||
2301 | static inline void | |
2302 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2303 | { | |
2304 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2305 | ||
2306 | if (ret) | |
2307 | *offset += len; | |
2308 | else | |
2309 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2310 | len, bfd_get_filename (obfd), | |
2311 | bfd_errmsg (bfd_get_error ())); | |
2312 | } | |
2313 | ||
2314 | static inline uint64_t | |
2315 | netorder64 (uint64_t input) | |
2316 | { | |
2317 | uint64_t ret; | |
2318 | ||
2319 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2320 | BFD_ENDIAN_BIG, input); | |
2321 | return ret; | |
2322 | } | |
2323 | ||
2324 | static inline uint32_t | |
2325 | netorder32 (uint32_t input) | |
2326 | { | |
2327 | uint32_t ret; | |
2328 | ||
d02ed0bb MM |
2329 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), |
2330 | BFD_ENDIAN_BIG, input); | |
2331 | return ret; | |
2332 | } | |
2333 | ||
2334 | /* Restore the execution log from a core_bfd file. */ | |
2335 | static void | |
88d1aa9d | 2336 | record_full_restore (void) |
d02ed0bb MM |
2337 | { |
2338 | uint32_t magic; | |
2339 | struct cleanup *old_cleanups; | |
88d1aa9d | 2340 | struct record_full_entry *rec; |
d02ed0bb MM |
2341 | asection *osec; |
2342 | uint32_t osec_size; | |
2343 | int bfd_offset = 0; | |
2344 | struct regcache *regcache; | |
2345 | ||
2346 | /* We restore the execution log from the open core bfd, | |
2347 | if there is one. */ | |
2348 | if (core_bfd == NULL) | |
2349 | return; | |
2350 | ||
88d1aa9d MM |
2351 | /* "record_full_restore" can only be called when record list is empty. */ |
2352 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2353 | |
2354 | if (record_debug) | |
2355 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2356 | ||
2357 | /* Now need to find our special note section. */ | |
2358 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2359 | if (record_debug) | |
2360 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2361 | osec ? "succeeded" : "failed"); | |
2362 | if (osec == NULL) | |
2363 | return; | |
2364 | osec_size = bfd_section_size (core_bfd, osec); | |
2365 | if (record_debug) | |
2366 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); | |
2367 | ||
2368 | /* Check the magic code. */ | |
2369 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2370 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2371 | error (_("Version mis-match or file format error in core file %s."), |
2372 | bfd_get_filename (core_bfd)); | |
2373 | if (record_debug) | |
2374 | fprintf_unfiltered (gdb_stdlog, | |
2375 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2376 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2377 | phex_nz (netorder32 (magic), 4)); |
2378 | ||
88d1aa9d MM |
2379 | /* Restore the entries in recfd into record_full_arch_list_head and |
2380 | record_full_arch_list_tail. */ | |
2381 | record_full_arch_list_head = NULL; | |
2382 | record_full_arch_list_tail = NULL; | |
2383 | record_full_insn_num = 0; | |
2384 | old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0); | |
d02ed0bb MM |
2385 | regcache = get_current_regcache (); |
2386 | ||
2387 | while (1) | |
2388 | { | |
2389 | uint8_t rectype; | |
2390 | uint32_t regnum, len, signal, count; | |
2391 | uint64_t addr; | |
2392 | ||
2393 | /* We are finished when offset reaches osec_size. */ | |
2394 | if (bfd_offset >= osec_size) | |
2395 | break; | |
2396 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
2397 | ||
2398 | switch (rectype) | |
2399 | { | |
88d1aa9d | 2400 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2401 | /* Get register number to regnum. */ |
2402 | bfdcore_read (core_bfd, osec, ®num, | |
2403 | sizeof (regnum), &bfd_offset); | |
2404 | regnum = netorder32 (regnum); | |
2405 | ||
88d1aa9d | 2406 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb MM |
2407 | |
2408 | /* Get val. */ | |
88d1aa9d | 2409 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2410 | rec->u.reg.len, &bfd_offset); |
2411 | ||
2412 | if (record_debug) | |
2413 | fprintf_unfiltered (gdb_stdlog, | |
2414 | " Reading register %d (1 " | |
2415 | "plus %lu plus %d bytes)\n", | |
2416 | rec->u.reg.num, | |
2417 | (unsigned long) sizeof (regnum), | |
2418 | rec->u.reg.len); | |
2419 | break; | |
2420 | ||
88d1aa9d | 2421 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2422 | /* Get len. */ |
2423 | bfdcore_read (core_bfd, osec, &len, | |
2424 | sizeof (len), &bfd_offset); | |
2425 | len = netorder32 (len); | |
2426 | ||
2427 | /* Get addr. */ | |
2428 | bfdcore_read (core_bfd, osec, &addr, | |
2429 | sizeof (addr), &bfd_offset); | |
2430 | addr = netorder64 (addr); | |
2431 | ||
88d1aa9d | 2432 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb MM |
2433 | |
2434 | /* Get val. */ | |
88d1aa9d | 2435 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), |
d02ed0bb MM |
2436 | rec->u.mem.len, &bfd_offset); |
2437 | ||
2438 | if (record_debug) | |
2439 | fprintf_unfiltered (gdb_stdlog, | |
2440 | " Reading memory %s (1 plus " | |
2441 | "%lu plus %lu plus %d bytes)\n", | |
2442 | paddress (get_current_arch (), | |
2443 | rec->u.mem.addr), | |
2444 | (unsigned long) sizeof (addr), | |
2445 | (unsigned long) sizeof (len), | |
2446 | rec->u.mem.len); | |
2447 | break; | |
2448 | ||
88d1aa9d MM |
2449 | case record_full_end: /* end */ |
2450 | rec = record_full_end_alloc (); | |
2451 | record_full_insn_num ++; | |
d02ed0bb MM |
2452 | |
2453 | /* Get signal value. */ | |
2454 | bfdcore_read (core_bfd, osec, &signal, | |
2455 | sizeof (signal), &bfd_offset); | |
2456 | signal = netorder32 (signal); | |
aead7601 | 2457 | rec->u.end.sigval = (enum gdb_signal) signal; |
d02ed0bb MM |
2458 | |
2459 | /* Get insn count. */ | |
2460 | bfdcore_read (core_bfd, osec, &count, | |
2461 | sizeof (count), &bfd_offset); | |
2462 | count = netorder32 (count); | |
2463 | rec->u.end.insn_num = count; | |
88d1aa9d | 2464 | record_full_insn_count = count + 1; |
d02ed0bb MM |
2465 | if (record_debug) |
2466 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2467 | " Reading record_full_end (1 + " |
d02ed0bb MM |
2468 | "%lu + %lu bytes), offset == %s\n", |
2469 | (unsigned long) sizeof (signal), | |
2470 | (unsigned long) sizeof (count), | |
2471 | paddress (get_current_arch (), | |
2472 | bfd_offset)); | |
2473 | break; | |
2474 | ||
2475 | default: | |
2476 | error (_("Bad entry type in core file %s."), | |
2477 | bfd_get_filename (core_bfd)); | |
2478 | break; | |
2479 | } | |
2480 | ||
2481 | /* Add rec to record arch list. */ | |
88d1aa9d | 2482 | record_full_arch_list_add (rec); |
d02ed0bb MM |
2483 | } |
2484 | ||
2485 | discard_cleanups (old_cleanups); | |
2486 | ||
88d1aa9d MM |
2487 | /* Add record_full_arch_list_head to the end of record list. */ |
2488 | record_full_first.next = record_full_arch_list_head; | |
2489 | record_full_arch_list_head->prev = &record_full_first; | |
2490 | record_full_arch_list_tail->next = NULL; | |
2491 | record_full_list = &record_full_first; | |
d02ed0bb | 2492 | |
88d1aa9d MM |
2493 | /* Update record_full_insn_max_num. */ |
2494 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2495 | { |
88d1aa9d | 2496 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2497 | warning (_("Auto increase record/replay buffer limit to %u."), |
88d1aa9d | 2498 | record_full_insn_max_num); |
d02ed0bb MM |
2499 | } |
2500 | ||
2501 | /* Succeeded. */ | |
2502 | printf_filtered (_("Restored records from core file %s.\n"), | |
2503 | bfd_get_filename (core_bfd)); | |
2504 | ||
08d72866 | 2505 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2506 | } |
2507 | ||
2508 | /* bfdcore_write -- write bytes into a core file section. */ | |
2509 | ||
2510 | static inline void | |
2511 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2512 | { | |
2513 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2514 | ||
2515 | if (ret) | |
2516 | *offset += len; | |
2517 | else | |
2518 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2519 | len, bfd_get_filename (obfd), | |
2520 | bfd_errmsg (bfd_get_error ())); | |
2521 | } | |
2522 | ||
2523 | /* Restore the execution log from a file. We use a modified elf | |
2524 | corefile format, with an extra section for our data. */ | |
2525 | ||
2526 | static void | |
41243651 | 2527 | cmd_record_full_restore (const char *args, int from_tty) |
d02ed0bb MM |
2528 | { |
2529 | core_file_command (args, from_tty); | |
88d1aa9d | 2530 | record_full_open (args, from_tty); |
d02ed0bb MM |
2531 | } |
2532 | ||
d02ed0bb MM |
2533 | /* Save the execution log to a file. We use a modified elf corefile |
2534 | format, with an extra section for our data. */ | |
2535 | ||
2536 | static void | |
1390f529 | 2537 | record_full_save (struct target_ops *self, const char *recfilename) |
d02ed0bb | 2538 | { |
88d1aa9d | 2539 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2540 | uint32_t magic; |
2541 | struct regcache *regcache; | |
2542 | struct gdbarch *gdbarch; | |
d02ed0bb MM |
2543 | int save_size = 0; |
2544 | asection *osec = NULL; | |
2545 | int bfd_offset = 0; | |
2546 | ||
2547 | /* Open the save file. */ | |
2548 | if (record_debug) | |
2549 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2550 | recfilename); | |
2551 | ||
2552 | /* Open the output file. */ | |
bef155c3 TT |
2553 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (recfilename)); |
2554 | ||
2555 | /* Arrange to remove the output file on failure. */ | |
2556 | gdb::unlinker unlink_file (recfilename); | |
d02ed0bb | 2557 | |
88d1aa9d MM |
2558 | /* Save the current record entry to "cur_record_full_list". */ |
2559 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2560 | |
2561 | /* Get the values of regcache and gdbarch. */ | |
2562 | regcache = get_current_regcache (); | |
2563 | gdbarch = get_regcache_arch (regcache); | |
2564 | ||
2565 | /* Disable the GDB operation record. */ | |
07036511 TT |
2566 | scoped_restore restore_operation_disable |
2567 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
2568 | |
2569 | /* Reverse execute to the begin of record list. */ | |
2570 | while (1) | |
2571 | { | |
2572 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2573 | if (record_full_list == &record_full_first) |
d02ed0bb MM |
2574 | break; |
2575 | ||
88d1aa9d | 2576 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2577 | |
88d1aa9d MM |
2578 | if (record_full_list->prev) |
2579 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2580 | } |
2581 | ||
2582 | /* Compute the size needed for the extra bfd section. */ | |
2583 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2584 | for (record_full_list = record_full_first.next; record_full_list; |
2585 | record_full_list = record_full_list->next) | |
2586 | switch (record_full_list->type) | |
d02ed0bb | 2587 | { |
88d1aa9d | 2588 | case record_full_end: |
d02ed0bb MM |
2589 | save_size += 1 + 4 + 4; |
2590 | break; | |
88d1aa9d MM |
2591 | case record_full_reg: |
2592 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2593 | break; |
88d1aa9d MM |
2594 | case record_full_mem: |
2595 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2596 | break; |
2597 | } | |
2598 | ||
2599 | /* Make the new bfd section. */ | |
bef155c3 | 2600 | osec = bfd_make_section_anyway_with_flags (obfd.get (), "precord", |
d02ed0bb MM |
2601 | SEC_HAS_CONTENTS |
2602 | | SEC_READONLY); | |
2603 | if (osec == NULL) | |
2604 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2605 | recfilename, | |
2606 | bfd_errmsg (bfd_get_error ())); | |
bef155c3 TT |
2607 | bfd_set_section_size (obfd.get (), osec, save_size); |
2608 | bfd_set_section_vma (obfd.get (), osec, 0); | |
2609 | bfd_set_section_alignment (obfd.get (), osec, 0); | |
2610 | bfd_section_lma (obfd.get (), osec) = 0; | |
d02ed0bb MM |
2611 | |
2612 | /* Save corefile state. */ | |
bef155c3 | 2613 | write_gcore_file (obfd.get ()); |
d02ed0bb MM |
2614 | |
2615 | /* Write out the record log. */ | |
2616 | /* Write the magic code. */ | |
88d1aa9d | 2617 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2618 | if (record_debug) |
2619 | fprintf_unfiltered (gdb_stdlog, | |
2620 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2621 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb | 2622 | phex_nz (magic, 4)); |
bef155c3 | 2623 | bfdcore_write (obfd.get (), osec, &magic, sizeof (magic), &bfd_offset); |
d02ed0bb MM |
2624 | |
2625 | /* Save the entries to recfd and forward execute to the end of | |
2626 | record list. */ | |
88d1aa9d | 2627 | record_full_list = &record_full_first; |
d02ed0bb MM |
2628 | while (1) |
2629 | { | |
2630 | /* Save entry. */ | |
88d1aa9d | 2631 | if (record_full_list != &record_full_first) |
d02ed0bb MM |
2632 | { |
2633 | uint8_t type; | |
2634 | uint32_t regnum, len, signal, count; | |
2635 | uint64_t addr; | |
2636 | ||
88d1aa9d | 2637 | type = record_full_list->type; |
bef155c3 | 2638 | bfdcore_write (obfd.get (), osec, &type, sizeof (type), &bfd_offset); |
d02ed0bb | 2639 | |
88d1aa9d | 2640 | switch (record_full_list->type) |
d02ed0bb | 2641 | { |
88d1aa9d | 2642 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2643 | if (record_debug) |
2644 | fprintf_unfiltered (gdb_stdlog, | |
2645 | " Writing register %d (1 " | |
2646 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2647 | record_full_list->u.reg.num, |
d02ed0bb | 2648 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2649 | record_full_list->u.reg.len); |
d02ed0bb MM |
2650 | |
2651 | /* Write regnum. */ | |
88d1aa9d | 2652 | regnum = netorder32 (record_full_list->u.reg.num); |
bef155c3 | 2653 | bfdcore_write (obfd.get (), osec, ®num, |
d02ed0bb MM |
2654 | sizeof (regnum), &bfd_offset); |
2655 | ||
2656 | /* Write regval. */ | |
bef155c3 | 2657 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2658 | record_full_get_loc (record_full_list), |
2659 | record_full_list->u.reg.len, &bfd_offset); | |
d02ed0bb MM |
2660 | break; |
2661 | ||
88d1aa9d | 2662 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2663 | if (record_debug) |
2664 | fprintf_unfiltered (gdb_stdlog, | |
2665 | " Writing memory %s (1 plus " | |
2666 | "%lu plus %lu plus %d bytes)\n", | |
2667 | paddress (gdbarch, | |
88d1aa9d | 2668 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2669 | (unsigned long) sizeof (addr), |
2670 | (unsigned long) sizeof (len), | |
88d1aa9d | 2671 | record_full_list->u.mem.len); |
d02ed0bb MM |
2672 | |
2673 | /* Write memlen. */ | |
88d1aa9d | 2674 | len = netorder32 (record_full_list->u.mem.len); |
bef155c3 TT |
2675 | bfdcore_write (obfd.get (), osec, &len, sizeof (len), |
2676 | &bfd_offset); | |
d02ed0bb MM |
2677 | |
2678 | /* Write memaddr. */ | |
88d1aa9d | 2679 | addr = netorder64 (record_full_list->u.mem.addr); |
bef155c3 | 2680 | bfdcore_write (obfd.get (), osec, &addr, |
d02ed0bb MM |
2681 | sizeof (addr), &bfd_offset); |
2682 | ||
2683 | /* Write memval. */ | |
bef155c3 | 2684 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2685 | record_full_get_loc (record_full_list), |
2686 | record_full_list->u.mem.len, &bfd_offset); | |
d02ed0bb MM |
2687 | break; |
2688 | ||
88d1aa9d | 2689 | case record_full_end: |
d02ed0bb MM |
2690 | if (record_debug) |
2691 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2692 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2693 | "%lu + %lu bytes)\n", |
2694 | (unsigned long) sizeof (signal), | |
2695 | (unsigned long) sizeof (count)); | |
2696 | /* Write signal value. */ | |
88d1aa9d | 2697 | signal = netorder32 (record_full_list->u.end.sigval); |
bef155c3 | 2698 | bfdcore_write (obfd.get (), osec, &signal, |
d02ed0bb MM |
2699 | sizeof (signal), &bfd_offset); |
2700 | ||
2701 | /* Write insn count. */ | |
88d1aa9d | 2702 | count = netorder32 (record_full_list->u.end.insn_num); |
bef155c3 | 2703 | bfdcore_write (obfd.get (), osec, &count, |
d02ed0bb MM |
2704 | sizeof (count), &bfd_offset); |
2705 | break; | |
2706 | } | |
2707 | } | |
2708 | ||
2709 | /* Execute entry. */ | |
88d1aa9d | 2710 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2711 | |
88d1aa9d MM |
2712 | if (record_full_list->next) |
2713 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
2714 | else |
2715 | break; | |
2716 | } | |
2717 | ||
88d1aa9d | 2718 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2719 | while (1) |
2720 | { | |
2721 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2722 | if (record_full_list == cur_record_full_list) |
d02ed0bb MM |
2723 | break; |
2724 | ||
88d1aa9d | 2725 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2726 | |
88d1aa9d MM |
2727 | if (record_full_list->prev) |
2728 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2729 | } |
2730 | ||
bef155c3 | 2731 | unlink_file.keep (); |
d02ed0bb MM |
2732 | |
2733 | /* Succeeded. */ | |
2734 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2735 | recfilename); | |
2736 | } | |
2737 | ||
88d1aa9d | 2738 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2739 | depending on DIR) to the given entry, changing the program state |
2740 | correspondingly. */ | |
2741 | ||
2742 | static void | |
88d1aa9d MM |
2743 | record_full_goto_insn (struct record_full_entry *entry, |
2744 | enum exec_direction_kind dir) | |
d02ed0bb | 2745 | { |
07036511 TT |
2746 | scoped_restore restore_operation_disable |
2747 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
2748 | struct regcache *regcache = get_current_regcache (); |
2749 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2750 | ||
2751 | /* Assume everything is valid: we will hit the entry, | |
2752 | and we will not hit the end of the recording. */ | |
2753 | ||
2754 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2755 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2756 | |
2757 | do | |
2758 | { | |
88d1aa9d | 2759 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2760 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2761 | record_full_list = record_full_list->prev; |
d02ed0bb | 2762 | else |
88d1aa9d MM |
2763 | record_full_list = record_full_list->next; |
2764 | } while (record_full_list != entry); | |
d02ed0bb MM |
2765 | } |
2766 | ||
2767 | /* Alias for "target record-full". */ | |
2768 | ||
2769 | static void | |
88d1aa9d | 2770 | cmd_record_full_start (char *args, int from_tty) |
d02ed0bb | 2771 | { |
9b2eba3d | 2772 | execute_command ((char *) "target record-full", from_tty); |
d02ed0bb MM |
2773 | } |
2774 | ||
2775 | static void | |
88d1aa9d MM |
2776 | set_record_full_insn_max_num (char *args, int from_tty, |
2777 | struct cmd_list_element *c) | |
d02ed0bb | 2778 | { |
7ee70bf5 | 2779 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2780 | { |
88d1aa9d MM |
2781 | /* Count down record_full_insn_num while releasing records from list. */ |
2782 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2783 | { |
88d1aa9d MM |
2784 | record_full_list_release_first (); |
2785 | record_full_insn_num--; | |
d02ed0bb MM |
2786 | } |
2787 | } | |
2788 | } | |
2789 | ||
2790 | /* The "set record full" command. */ | |
2791 | ||
2792 | static void | |
2793 | set_record_full_command (char *args, int from_tty) | |
2794 | { | |
2795 | printf_unfiltered (_("\"set record full\" must be followed " | |
2796 | "by an apporpriate subcommand.\n")); | |
2797 | help_list (set_record_full_cmdlist, "set record full ", all_commands, | |
2798 | gdb_stdout); | |
2799 | } | |
2800 | ||
2801 | /* The "show record full" command. */ | |
2802 | ||
2803 | static void | |
2804 | show_record_full_command (char *args, int from_tty) | |
2805 | { | |
2806 | cmd_show_list (show_record_full_cmdlist, from_tty, ""); | |
2807 | } | |
2808 | ||
d02ed0bb MM |
2809 | void |
2810 | _initialize_record_full (void) | |
2811 | { | |
2812 | struct cmd_list_element *c; | |
2813 | ||
88d1aa9d MM |
2814 | /* Init record_full_first. */ |
2815 | record_full_first.prev = NULL; | |
2816 | record_full_first.next = NULL; | |
2817 | record_full_first.type = record_full_end; | |
d02ed0bb | 2818 | |
88d1aa9d MM |
2819 | init_record_full_ops (); |
2820 | add_target (&record_full_ops); | |
2821 | add_deprecated_target_alias (&record_full_ops, "record"); | |
2822 | init_record_full_core_ops (); | |
2823 | add_target (&record_full_core_ops); | |
d02ed0bb | 2824 | |
88d1aa9d | 2825 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb MM |
2826 | _("Start full execution recording."), &record_full_cmdlist, |
2827 | "record full ", 0, &record_cmdlist); | |
2828 | ||
88d1aa9d | 2829 | c = add_cmd ("restore", class_obscure, cmd_record_full_restore, |
d02ed0bb MM |
2830 | _("Restore the execution log from a file.\n\ |
2831 | Argument is filename. File must be created with 'record save'."), | |
2832 | &record_full_cmdlist); | |
2833 | set_cmd_completer (c, filename_completer); | |
2834 | ||
2835 | /* Deprecate the old version without "full" prefix. */ | |
2836 | c = add_alias_cmd ("restore", "full restore", class_obscure, 1, | |
2837 | &record_cmdlist); | |
2838 | set_cmd_completer (c, filename_completer); | |
2839 | deprecate_cmd (c, "record full restore"); | |
2840 | ||
2841 | add_prefix_cmd ("full", class_support, set_record_full_command, | |
2842 | _("Set record options"), &set_record_full_cmdlist, | |
2843 | "set record full ", 0, &set_record_cmdlist); | |
2844 | ||
2845 | add_prefix_cmd ("full", class_support, show_record_full_command, | |
2846 | _("Show record options"), &show_record_full_cmdlist, | |
2847 | "show record full ", 0, &show_record_cmdlist); | |
2848 | ||
2849 | /* Record instructions number limit command. */ | |
2850 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
88d1aa9d | 2851 | &record_full_stop_at_limit, _("\ |
d02ed0bb MM |
2852 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2853 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2854 | _("Default is ON.\n\ | |
2855 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2856 | When OFF, if the record/replay buffer becomes full,\n\ | |
2857 | delete the oldest recorded instruction to make room for each new one."), | |
2858 | NULL, NULL, | |
2859 | &set_record_full_cmdlist, &show_record_full_cmdlist); | |
2860 | ||
2861 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2862 | &set_record_cmdlist); | |
2863 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2864 | ||
2865 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2866 | &show_record_cmdlist); | |
2867 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2868 | ||
88d1aa9d MM |
2869 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
2870 | &record_full_insn_max_num, | |
d02ed0bb MM |
2871 | _("Set record/replay buffer limit."), |
2872 | _("Show record/replay buffer limit."), _("\ | |
2873 | Set the maximum number of instructions to be stored in the\n\ | |
f81d1120 PA |
2874 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2875 | limit. Default is 200000."), | |
88d1aa9d | 2876 | set_record_full_insn_max_num, |
d02ed0bb MM |
2877 | NULL, &set_record_full_cmdlist, |
2878 | &show_record_full_cmdlist); | |
2879 | ||
2880 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2881 | &set_record_cmdlist); | |
2882 | deprecate_cmd (c, "set record full insn-number-max"); | |
2883 | ||
2884 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2885 | &show_record_cmdlist); | |
2886 | deprecate_cmd (c, "show record full insn-number-max"); | |
2887 | ||
88d1aa9d | 2888 | add_setshow_boolean_cmd ("memory-query", no_class, |
25ea693b | 2889 | &record_full_memory_query, _("\ |
d02ed0bb MM |
2890 | Set whether query if PREC cannot record memory change of next instruction."), |
2891 | _("\ | |
2892 | Show whether query if PREC cannot record memory change of next instruction."), | |
2893 | _("\ | |
2894 | Default is OFF.\n\ | |
2895 | When ON, query if PREC cannot record memory change of next instruction."), | |
2896 | NULL, NULL, | |
88d1aa9d MM |
2897 | &set_record_full_cmdlist, |
2898 | &show_record_full_cmdlist); | |
d02ed0bb MM |
2899 | |
2900 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2901 | &set_record_cmdlist); | |
2902 | deprecate_cmd (c, "set record full memory-query"); | |
2903 | ||
2904 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2905 | &show_record_cmdlist); | |
2906 | deprecate_cmd (c, "show record full memory-query"); | |
2907 | } |