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d02ed0bb MM |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2013-2020 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" | |
00431a78 | 24 | #include "inferior.h" |
d02ed0bb | 25 | #include "event-top.h" |
d02ed0bb MM |
26 | #include "completer.h" |
27 | #include "arch-utils.h" | |
28 | #include "gdbcore.h" | |
29 | #include "exec.h" | |
30 | #include "record.h" | |
31 | #include "record-full.h" | |
32 | #include "elf-bfd.h" | |
33 | #include "gcore.h" | |
400b5eca | 34 | #include "gdbsupport/event-loop.h" |
d02ed0bb MM |
35 | #include "inf-loop.h" |
36 | #include "gdb_bfd.h" | |
76727919 | 37 | #include "observable.h" |
45741a9c | 38 | #include "infrun.h" |
268a13a5 TT |
39 | #include "gdbsupport/gdb_unlinker.h" |
40 | #include "gdbsupport/byte-vector.h" | |
93b54c8e | 41 | #include "async-event.h" |
d02ed0bb MM |
42 | |
43 | #include <signal.h> | |
44 | ||
45 | /* This module implements "target record-full", also known as "process | |
46 | record and replay". This target sits on top of a "normal" target | |
47 | (a target that "has execution"), and provides a record and replay | |
48 | functionality, including reverse debugging. | |
49 | ||
50 | Target record has two modes: recording, and replaying. | |
51 | ||
f6ac5f3d | 52 | In record mode, we intercept the resume and wait methods. |
d02ed0bb MM |
53 | Whenever gdb resumes the target, we run the target in single step |
54 | mode, and we build up an execution log in which, for each executed | |
55 | instruction, we record all changes in memory and register state. | |
56 | This is invisible to the user, to whom it just looks like an | |
30baf67b | 57 | ordinary debugging session (except for performance degradation). |
d02ed0bb MM |
58 | |
59 | In replay mode, instead of actually letting the inferior run as a | |
60 | process, we simulate its execution by playing back the recorded | |
61 | execution log. For each instruction in the log, we simulate the | |
62 | instruction's side effects by duplicating the changes that it would | |
63 | have made on memory and registers. */ | |
64 | ||
88d1aa9d | 65 | #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000 |
d02ed0bb | 66 | |
88d1aa9d | 67 | #define RECORD_FULL_IS_REPLAY \ |
f6ac5f3d | 68 | (record_full_list->next || ::execution_direction == EXEC_REVERSE) |
d02ed0bb | 69 | |
88d1aa9d | 70 | #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016) |
d02ed0bb MM |
71 | |
72 | /* These are the core structs of the process record functionality. | |
73 | ||
88d1aa9d MM |
74 | A record_full_entry is a record of the value change of a register |
75 | ("record_full_reg") or a part of memory ("record_full_mem"). And each | |
76 | instruction must have a struct record_full_entry ("record_full_end") | |
77 | that indicates that this is the last struct record_full_entry of this | |
d02ed0bb MM |
78 | instruction. |
79 | ||
88d1aa9d MM |
80 | Each struct record_full_entry is linked to "record_full_list" by "prev" |
81 | and "next" pointers. */ | |
d02ed0bb | 82 | |
88d1aa9d | 83 | struct record_full_mem_entry |
d02ed0bb MM |
84 | { |
85 | CORE_ADDR addr; | |
86 | int len; | |
87 | /* Set this flag if target memory for this entry | |
88 | can no longer be accessed. */ | |
89 | int mem_entry_not_accessible; | |
90 | union | |
91 | { | |
92 | gdb_byte *ptr; | |
93 | gdb_byte buf[sizeof (gdb_byte *)]; | |
94 | } u; | |
95 | }; | |
96 | ||
88d1aa9d | 97 | struct record_full_reg_entry |
d02ed0bb MM |
98 | { |
99 | unsigned short num; | |
100 | unsigned short len; | |
101 | union | |
102 | { | |
103 | gdb_byte *ptr; | |
104 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
105 | } u; | |
106 | }; | |
107 | ||
88d1aa9d | 108 | struct record_full_end_entry |
d02ed0bb MM |
109 | { |
110 | enum gdb_signal sigval; | |
111 | ULONGEST insn_num; | |
112 | }; | |
113 | ||
88d1aa9d | 114 | enum record_full_type |
d02ed0bb | 115 | { |
88d1aa9d MM |
116 | record_full_end = 0, |
117 | record_full_reg, | |
118 | record_full_mem | |
d02ed0bb MM |
119 | }; |
120 | ||
121 | /* This is the data structure that makes up the execution log. | |
122 | ||
123 | The execution log consists of a single linked list of entries | |
88d1aa9d | 124 | of type "struct record_full_entry". It is doubly linked so that it |
d02ed0bb MM |
125 | can be traversed in either direction. |
126 | ||
127 | The start of the list is anchored by a struct called | |
88d1aa9d MM |
128 | "record_full_first". The pointer "record_full_list" either points |
129 | to the last entry that was added to the list (in record mode), or to | |
130 | the next entry in the list that will be executed (in replay mode). | |
d02ed0bb | 131 | |
88d1aa9d MM |
132 | Each list element (struct record_full_entry), in addition to next |
133 | and prev pointers, consists of a union of three entry types: mem, | |
134 | reg, and end. A field called "type" determines which entry type is | |
d02ed0bb MM |
135 | represented by a given list element. |
136 | ||
137 | Each instruction that is added to the execution log is represented | |
138 | by a variable number of list elements ('entries'). The instruction | |
139 | will have one "reg" entry for each register that is changed by | |
140 | executing the instruction (including the PC in every case). It | |
141 | will also have one "mem" entry for each memory change. Finally, | |
142 | each instruction will have an "end" entry that separates it from | |
143 | the changes associated with the next instruction. */ | |
144 | ||
88d1aa9d | 145 | struct record_full_entry |
d02ed0bb | 146 | { |
88d1aa9d MM |
147 | struct record_full_entry *prev; |
148 | struct record_full_entry *next; | |
149 | enum record_full_type type; | |
d02ed0bb MM |
150 | union |
151 | { | |
152 | /* reg */ | |
88d1aa9d | 153 | struct record_full_reg_entry reg; |
d02ed0bb | 154 | /* mem */ |
88d1aa9d | 155 | struct record_full_mem_entry mem; |
d02ed0bb | 156 | /* end */ |
88d1aa9d | 157 | struct record_full_end_entry end; |
d02ed0bb MM |
158 | } u; |
159 | }; | |
160 | ||
161 | /* If true, query if PREC cannot record memory | |
162 | change of next instruction. */ | |
491144b5 | 163 | bool record_full_memory_query = false; |
d02ed0bb | 164 | |
88d1aa9d | 165 | struct record_full_core_buf_entry |
d02ed0bb | 166 | { |
88d1aa9d | 167 | struct record_full_core_buf_entry *prev; |
d02ed0bb MM |
168 | struct target_section *p; |
169 | bfd_byte *buf; | |
170 | }; | |
171 | ||
172 | /* Record buf with core target. */ | |
c8ec2f33 | 173 | static detached_regcache *record_full_core_regbuf = NULL; |
88d1aa9d MM |
174 | static struct target_section *record_full_core_start; |
175 | static struct target_section *record_full_core_end; | |
176 | static struct record_full_core_buf_entry *record_full_core_buf_list = NULL; | |
d02ed0bb MM |
177 | |
178 | /* The following variables are used for managing the linked list that | |
179 | represents the execution log. | |
180 | ||
88d1aa9d MM |
181 | record_full_first is the anchor that holds down the beginning of |
182 | the list. | |
d02ed0bb | 183 | |
88d1aa9d | 184 | record_full_list serves two functions: |
d02ed0bb MM |
185 | 1) In record mode, it anchors the end of the list. |
186 | 2) In replay mode, it traverses the list and points to | |
187 | the next instruction that must be emulated. | |
188 | ||
88d1aa9d MM |
189 | record_full_arch_list_head and record_full_arch_list_tail are used |
190 | to manage a separate list, which is used to build up the change | |
191 | elements of the currently executing instruction during record mode. | |
192 | When this instruction has been completely annotated in the "arch | |
193 | list", it will be appended to the main execution log. */ | |
d02ed0bb | 194 | |
88d1aa9d MM |
195 | static struct record_full_entry record_full_first; |
196 | static struct record_full_entry *record_full_list = &record_full_first; | |
197 | static struct record_full_entry *record_full_arch_list_head = NULL; | |
198 | static struct record_full_entry *record_full_arch_list_tail = NULL; | |
d02ed0bb | 199 | |
491144b5 CB |
200 | /* true ask user. false auto delete the last struct record_full_entry. */ |
201 | static bool record_full_stop_at_limit = true; | |
d02ed0bb | 202 | /* Maximum allowed number of insns in execution log. */ |
88d1aa9d MM |
203 | static unsigned int record_full_insn_max_num |
204 | = DEFAULT_RECORD_FULL_INSN_MAX_NUM; | |
d02ed0bb | 205 | /* Actual count of insns presently in execution log. */ |
7ee70bf5 | 206 | static unsigned int record_full_insn_num = 0; |
d02ed0bb MM |
207 | /* Count of insns logged so far (may be larger |
208 | than count of insns presently in execution log). */ | |
88d1aa9d | 209 | static ULONGEST record_full_insn_count; |
d02ed0bb | 210 | |
d9f719f1 PA |
211 | static const char record_longname[] |
212 | = N_("Process record and replay target"); | |
213 | static const char record_doc[] | |
214 | = N_("Log program while executing and replay execution from log."); | |
215 | ||
f6ac5f3d PA |
216 | /* Base class implementing functionality common to both the |
217 | "record-full" and "record-core" targets. */ | |
218 | ||
219 | class record_full_base_target : public target_ops | |
220 | { | |
221 | public: | |
d9f719f1 | 222 | const target_info &info () const override = 0; |
f6ac5f3d | 223 | |
66b4deae PA |
224 | strata stratum () const override { return record_stratum; } |
225 | ||
f6ac5f3d PA |
226 | void close () override; |
227 | void async (int) override; | |
228 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
57810aa7 PA |
229 | bool stopped_by_watchpoint () override; |
230 | bool stopped_data_address (CORE_ADDR *) override; | |
f6ac5f3d | 231 | |
57810aa7 PA |
232 | bool stopped_by_sw_breakpoint () override; |
233 | bool supports_stopped_by_sw_breakpoint () override; | |
f6ac5f3d | 234 | |
57810aa7 PA |
235 | bool stopped_by_hw_breakpoint () override; |
236 | bool supports_stopped_by_hw_breakpoint () override; | |
f6ac5f3d | 237 | |
57810aa7 | 238 | bool can_execute_reverse () override; |
f6ac5f3d PA |
239 | |
240 | /* Add bookmark target methods. */ | |
241 | gdb_byte *get_bookmark (const char *, int) override; | |
242 | void goto_bookmark (const gdb_byte *, int) override; | |
243 | enum exec_direction_kind execution_direction () override; | |
244 | enum record_method record_method (ptid_t ptid) override; | |
245 | void info_record () override; | |
246 | void save_record (const char *filename) override; | |
247 | bool supports_delete_record () override; | |
248 | void delete_record () override; | |
57810aa7 PA |
249 | bool record_is_replaying (ptid_t ptid) override; |
250 | bool record_will_replay (ptid_t ptid, int dir) override; | |
f6ac5f3d PA |
251 | void record_stop_replaying () override; |
252 | void goto_record_begin () override; | |
253 | void goto_record_end () override; | |
254 | void goto_record (ULONGEST insn) override; | |
255 | }; | |
256 | ||
257 | /* The "record-full" target. */ | |
258 | ||
d9f719f1 PA |
259 | static const target_info record_full_target_info = { |
260 | "record-full", | |
261 | record_longname, | |
262 | record_doc, | |
263 | }; | |
264 | ||
f6ac5f3d PA |
265 | class record_full_target final : public record_full_base_target |
266 | { | |
267 | public: | |
d9f719f1 PA |
268 | const target_info &info () const override |
269 | { return record_full_target_info; } | |
f6ac5f3d PA |
270 | |
271 | void commit_resume () override; | |
272 | void resume (ptid_t, int, enum gdb_signal) override; | |
273 | void disconnect (const char *, int) override; | |
274 | void detach (inferior *, int) override; | |
275 | void mourn_inferior () override; | |
276 | void kill () override; | |
277 | void store_registers (struct regcache *, int) override; | |
278 | enum target_xfer_status xfer_partial (enum target_object object, | |
279 | const char *annex, | |
280 | gdb_byte *readbuf, | |
281 | const gdb_byte *writebuf, | |
282 | ULONGEST offset, ULONGEST len, | |
283 | ULONGEST *xfered_len) override; | |
284 | int insert_breakpoint (struct gdbarch *, | |
285 | struct bp_target_info *) override; | |
286 | int remove_breakpoint (struct gdbarch *, | |
287 | struct bp_target_info *, | |
288 | enum remove_bp_reason) override; | |
289 | }; | |
290 | ||
291 | /* The "record-core" target. */ | |
292 | ||
d9f719f1 PA |
293 | static const target_info record_full_core_target_info = { |
294 | "record-core", | |
295 | record_longname, | |
296 | record_doc, | |
297 | }; | |
298 | ||
f6ac5f3d PA |
299 | class record_full_core_target final : public record_full_base_target |
300 | { | |
301 | public: | |
d9f719f1 PA |
302 | const target_info &info () const override |
303 | { return record_full_core_target_info; } | |
f6ac5f3d PA |
304 | |
305 | void resume (ptid_t, int, enum gdb_signal) override; | |
306 | void disconnect (const char *, int) override; | |
307 | void kill () override; | |
308 | void fetch_registers (struct regcache *regcache, int regno) override; | |
309 | void prepare_to_store (struct regcache *regcache) override; | |
310 | void store_registers (struct regcache *, int) override; | |
311 | enum target_xfer_status xfer_partial (enum target_object object, | |
312 | const char *annex, | |
313 | gdb_byte *readbuf, | |
314 | const gdb_byte *writebuf, | |
315 | ULONGEST offset, ULONGEST len, | |
316 | ULONGEST *xfered_len) override; | |
317 | int insert_breakpoint (struct gdbarch *, | |
318 | struct bp_target_info *) override; | |
319 | int remove_breakpoint (struct gdbarch *, | |
320 | struct bp_target_info *, | |
321 | enum remove_bp_reason) override; | |
322 | ||
5018ce90 | 323 | bool has_execution (inferior *inf) override; |
f6ac5f3d PA |
324 | }; |
325 | ||
326 | static record_full_target record_full_ops; | |
327 | static record_full_core_target record_full_core_ops; | |
328 | ||
329 | void | |
330 | record_full_target::detach (inferior *inf, int from_tty) | |
331 | { | |
332 | record_detach (this, inf, from_tty); | |
333 | } | |
334 | ||
335 | void | |
336 | record_full_target::disconnect (const char *args, int from_tty) | |
337 | { | |
338 | record_disconnect (this, args, from_tty); | |
339 | } | |
340 | ||
341 | void | |
342 | record_full_core_target::disconnect (const char *args, int from_tty) | |
343 | { | |
344 | record_disconnect (this, args, from_tty); | |
345 | } | |
346 | ||
347 | void | |
348 | record_full_target::mourn_inferior () | |
349 | { | |
350 | record_mourn_inferior (this); | |
351 | } | |
352 | ||
353 | void | |
354 | record_full_target::kill () | |
355 | { | |
356 | record_kill (this); | |
357 | } | |
d02ed0bb | 358 | |
8213266a PA |
359 | /* See record-full.h. */ |
360 | ||
361 | int | |
362 | record_full_is_used (void) | |
363 | { | |
364 | struct target_ops *t; | |
365 | ||
366 | t = find_record_target (); | |
367 | return (t == &record_full_ops | |
368 | || t == &record_full_core_ops); | |
369 | } | |
370 | ||
371 | ||
d02ed0bb MM |
372 | /* Command lists for "set/show record full". */ |
373 | static struct cmd_list_element *set_record_full_cmdlist; | |
374 | static struct cmd_list_element *show_record_full_cmdlist; | |
375 | ||
376 | /* Command list for "record full". */ | |
377 | static struct cmd_list_element *record_full_cmdlist; | |
378 | ||
88d1aa9d MM |
379 | static void record_full_goto_insn (struct record_full_entry *entry, |
380 | enum exec_direction_kind dir); | |
88d1aa9d MM |
381 | |
382 | /* Alloc and free functions for record_full_reg, record_full_mem, and | |
383 | record_full_end entries. */ | |
384 | ||
385 | /* Alloc a record_full_reg record entry. */ | |
386 | ||
387 | static inline struct record_full_entry * | |
388 | record_full_reg_alloc (struct regcache *regcache, int regnum) | |
389 | { | |
390 | struct record_full_entry *rec; | |
ac7936df | 391 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb | 392 | |
8d749320 | 393 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 394 | rec->type = record_full_reg; |
d02ed0bb MM |
395 | rec->u.reg.num = regnum; |
396 | rec->u.reg.len = register_size (gdbarch, regnum); | |
397 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
398 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
399 | ||
400 | return rec; | |
401 | } | |
402 | ||
88d1aa9d | 403 | /* Free a record_full_reg record entry. */ |
d02ed0bb MM |
404 | |
405 | static inline void | |
88d1aa9d | 406 | record_full_reg_release (struct record_full_entry *rec) |
d02ed0bb | 407 | { |
88d1aa9d | 408 | gdb_assert (rec->type == record_full_reg); |
d02ed0bb MM |
409 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
410 | xfree (rec->u.reg.u.ptr); | |
411 | xfree (rec); | |
412 | } | |
413 | ||
88d1aa9d | 414 | /* Alloc a record_full_mem record entry. */ |
d02ed0bb | 415 | |
88d1aa9d MM |
416 | static inline struct record_full_entry * |
417 | record_full_mem_alloc (CORE_ADDR addr, int len) | |
d02ed0bb | 418 | { |
88d1aa9d | 419 | struct record_full_entry *rec; |
d02ed0bb | 420 | |
8d749320 | 421 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 422 | rec->type = record_full_mem; |
d02ed0bb MM |
423 | rec->u.mem.addr = addr; |
424 | rec->u.mem.len = len; | |
425 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
426 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
427 | ||
428 | return rec; | |
429 | } | |
430 | ||
88d1aa9d | 431 | /* Free a record_full_mem record entry. */ |
d02ed0bb MM |
432 | |
433 | static inline void | |
88d1aa9d | 434 | record_full_mem_release (struct record_full_entry *rec) |
d02ed0bb | 435 | { |
88d1aa9d | 436 | gdb_assert (rec->type == record_full_mem); |
d02ed0bb MM |
437 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
438 | xfree (rec->u.mem.u.ptr); | |
439 | xfree (rec); | |
440 | } | |
441 | ||
88d1aa9d | 442 | /* Alloc a record_full_end record entry. */ |
d02ed0bb | 443 | |
88d1aa9d MM |
444 | static inline struct record_full_entry * |
445 | record_full_end_alloc (void) | |
d02ed0bb | 446 | { |
88d1aa9d | 447 | struct record_full_entry *rec; |
d02ed0bb | 448 | |
8d749320 | 449 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 450 | rec->type = record_full_end; |
d02ed0bb MM |
451 | |
452 | return rec; | |
453 | } | |
454 | ||
88d1aa9d | 455 | /* Free a record_full_end record entry. */ |
d02ed0bb MM |
456 | |
457 | static inline void | |
88d1aa9d | 458 | record_full_end_release (struct record_full_entry *rec) |
d02ed0bb MM |
459 | { |
460 | xfree (rec); | |
461 | } | |
462 | ||
463 | /* Free one record entry, any type. | |
464 | Return entry->type, in case caller wants to know. */ | |
465 | ||
88d1aa9d MM |
466 | static inline enum record_full_type |
467 | record_full_entry_release (struct record_full_entry *rec) | |
d02ed0bb | 468 | { |
88d1aa9d | 469 | enum record_full_type type = rec->type; |
d02ed0bb MM |
470 | |
471 | switch (type) { | |
88d1aa9d MM |
472 | case record_full_reg: |
473 | record_full_reg_release (rec); | |
d02ed0bb | 474 | break; |
88d1aa9d MM |
475 | case record_full_mem: |
476 | record_full_mem_release (rec); | |
d02ed0bb | 477 | break; |
88d1aa9d MM |
478 | case record_full_end: |
479 | record_full_end_release (rec); | |
d02ed0bb MM |
480 | break; |
481 | } | |
482 | return type; | |
483 | } | |
484 | ||
485 | /* Free all record entries in list pointed to by REC. */ | |
486 | ||
487 | static void | |
88d1aa9d | 488 | record_full_list_release (struct record_full_entry *rec) |
d02ed0bb MM |
489 | { |
490 | if (!rec) | |
491 | return; | |
492 | ||
493 | while (rec->next) | |
494 | rec = rec->next; | |
495 | ||
496 | while (rec->prev) | |
497 | { | |
498 | rec = rec->prev; | |
88d1aa9d | 499 | record_full_entry_release (rec->next); |
d02ed0bb MM |
500 | } |
501 | ||
88d1aa9d | 502 | if (rec == &record_full_first) |
d02ed0bb | 503 | { |
88d1aa9d MM |
504 | record_full_insn_num = 0; |
505 | record_full_first.next = NULL; | |
d02ed0bb MM |
506 | } |
507 | else | |
88d1aa9d | 508 | record_full_entry_release (rec); |
d02ed0bb MM |
509 | } |
510 | ||
511 | /* Free all record entries forward of the given list position. */ | |
512 | ||
513 | static void | |
88d1aa9d | 514 | record_full_list_release_following (struct record_full_entry *rec) |
d02ed0bb | 515 | { |
88d1aa9d | 516 | struct record_full_entry *tmp = rec->next; |
d02ed0bb MM |
517 | |
518 | rec->next = NULL; | |
519 | while (tmp) | |
520 | { | |
521 | rec = tmp->next; | |
88d1aa9d | 522 | if (record_full_entry_release (tmp) == record_full_end) |
d02ed0bb | 523 | { |
88d1aa9d MM |
524 | record_full_insn_num--; |
525 | record_full_insn_count--; | |
d02ed0bb MM |
526 | } |
527 | tmp = rec; | |
528 | } | |
529 | } | |
530 | ||
531 | /* Delete the first instruction from the beginning of the log, to make | |
532 | room for adding a new instruction at the end of the log. | |
533 | ||
88d1aa9d | 534 | Note -- this function does not modify record_full_insn_num. */ |
d02ed0bb MM |
535 | |
536 | static void | |
88d1aa9d | 537 | record_full_list_release_first (void) |
d02ed0bb | 538 | { |
88d1aa9d | 539 | struct record_full_entry *tmp; |
d02ed0bb | 540 | |
88d1aa9d | 541 | if (!record_full_first.next) |
d02ed0bb MM |
542 | return; |
543 | ||
88d1aa9d | 544 | /* Loop until a record_full_end. */ |
d02ed0bb MM |
545 | while (1) |
546 | { | |
88d1aa9d MM |
547 | /* Cut record_full_first.next out of the linked list. */ |
548 | tmp = record_full_first.next; | |
549 | record_full_first.next = tmp->next; | |
550 | tmp->next->prev = &record_full_first; | |
d02ed0bb MM |
551 | |
552 | /* tmp is now isolated, and can be deleted. */ | |
88d1aa9d MM |
553 | if (record_full_entry_release (tmp) == record_full_end) |
554 | break; /* End loop at first record_full_end. */ | |
d02ed0bb | 555 | |
88d1aa9d | 556 | if (!record_full_first.next) |
d02ed0bb | 557 | { |
88d1aa9d | 558 | gdb_assert (record_full_insn_num == 1); |
d02ed0bb MM |
559 | break; /* End loop when list is empty. */ |
560 | } | |
561 | } | |
562 | } | |
563 | ||
88d1aa9d | 564 | /* Add a struct record_full_entry to record_full_arch_list. */ |
d02ed0bb MM |
565 | |
566 | static void | |
88d1aa9d | 567 | record_full_arch_list_add (struct record_full_entry *rec) |
d02ed0bb MM |
568 | { |
569 | if (record_debug > 1) | |
570 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 571 | "Process record: record_full_arch_list_add %s.\n", |
d02ed0bb MM |
572 | host_address_to_string (rec)); |
573 | ||
88d1aa9d | 574 | if (record_full_arch_list_tail) |
d02ed0bb | 575 | { |
88d1aa9d MM |
576 | record_full_arch_list_tail->next = rec; |
577 | rec->prev = record_full_arch_list_tail; | |
578 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
579 | } |
580 | else | |
581 | { | |
88d1aa9d MM |
582 | record_full_arch_list_head = rec; |
583 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
584 | } |
585 | } | |
586 | ||
587 | /* Return the value storage location of a record entry. */ | |
588 | static inline gdb_byte * | |
88d1aa9d | 589 | record_full_get_loc (struct record_full_entry *rec) |
d02ed0bb MM |
590 | { |
591 | switch (rec->type) { | |
88d1aa9d | 592 | case record_full_mem: |
d02ed0bb MM |
593 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
594 | return rec->u.mem.u.ptr; | |
595 | else | |
596 | return rec->u.mem.u.buf; | |
88d1aa9d | 597 | case record_full_reg: |
d02ed0bb MM |
598 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
599 | return rec->u.reg.u.ptr; | |
600 | else | |
601 | return rec->u.reg.u.buf; | |
88d1aa9d | 602 | case record_full_end: |
d02ed0bb | 603 | default: |
88d1aa9d | 604 | gdb_assert_not_reached ("unexpected record_full_entry type"); |
d02ed0bb MM |
605 | return NULL; |
606 | } | |
607 | } | |
608 | ||
88d1aa9d | 609 | /* Record the value of a register NUM to record_full_arch_list. */ |
d02ed0bb MM |
610 | |
611 | int | |
25ea693b | 612 | record_full_arch_list_add_reg (struct regcache *regcache, int regnum) |
d02ed0bb | 613 | { |
88d1aa9d | 614 | struct record_full_entry *rec; |
d02ed0bb MM |
615 | |
616 | if (record_debug > 1) | |
617 | fprintf_unfiltered (gdb_stdlog, | |
618 | "Process record: add register num = %d to " | |
619 | "record list.\n", | |
620 | regnum); | |
621 | ||
88d1aa9d | 622 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 623 | |
0b883586 | 624 | regcache->raw_read (regnum, record_full_get_loc (rec)); |
d02ed0bb | 625 | |
88d1aa9d | 626 | record_full_arch_list_add (rec); |
d02ed0bb MM |
627 | |
628 | return 0; | |
629 | } | |
630 | ||
631 | /* Record the value of a region of memory whose address is ADDR and | |
88d1aa9d | 632 | length is LEN to record_full_arch_list. */ |
d02ed0bb MM |
633 | |
634 | int | |
25ea693b | 635 | record_full_arch_list_add_mem (CORE_ADDR addr, int len) |
d02ed0bb | 636 | { |
88d1aa9d | 637 | struct record_full_entry *rec; |
d02ed0bb MM |
638 | |
639 | if (record_debug > 1) | |
640 | fprintf_unfiltered (gdb_stdlog, | |
641 | "Process record: add mem addr = %s len = %d to " | |
642 | "record list.\n", | |
643 | paddress (target_gdbarch (), addr), len); | |
644 | ||
645 | if (!addr) /* FIXME: Why? Some arch must permit it... */ | |
646 | return 0; | |
647 | ||
88d1aa9d | 648 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb | 649 | |
88d1aa9d MM |
650 | if (record_read_memory (target_gdbarch (), addr, |
651 | record_full_get_loc (rec), len)) | |
d02ed0bb | 652 | { |
88d1aa9d | 653 | record_full_mem_release (rec); |
d02ed0bb MM |
654 | return -1; |
655 | } | |
656 | ||
88d1aa9d | 657 | record_full_arch_list_add (rec); |
d02ed0bb MM |
658 | |
659 | return 0; | |
660 | } | |
661 | ||
88d1aa9d MM |
662 | /* Add a record_full_end type struct record_full_entry to |
663 | record_full_arch_list. */ | |
d02ed0bb MM |
664 | |
665 | int | |
25ea693b | 666 | record_full_arch_list_add_end (void) |
d02ed0bb | 667 | { |
88d1aa9d | 668 | struct record_full_entry *rec; |
d02ed0bb MM |
669 | |
670 | if (record_debug > 1) | |
671 | fprintf_unfiltered (gdb_stdlog, | |
672 | "Process record: add end to arch list.\n"); | |
673 | ||
88d1aa9d | 674 | rec = record_full_end_alloc (); |
d02ed0bb | 675 | rec->u.end.sigval = GDB_SIGNAL_0; |
88d1aa9d | 676 | rec->u.end.insn_num = ++record_full_insn_count; |
d02ed0bb | 677 | |
88d1aa9d | 678 | record_full_arch_list_add (rec); |
d02ed0bb MM |
679 | |
680 | return 0; | |
681 | } | |
682 | ||
683 | static void | |
651ce16a | 684 | record_full_check_insn_num (void) |
d02ed0bb | 685 | { |
7ee70bf5 | 686 | if (record_full_insn_num == record_full_insn_max_num) |
d02ed0bb | 687 | { |
7ee70bf5 PA |
688 | /* Ask user what to do. */ |
689 | if (record_full_stop_at_limit) | |
d02ed0bb | 690 | { |
651ce16a | 691 | if (!yquery (_("Do you want to auto delete previous execution " |
7ee70bf5 | 692 | "log entries when record/replay buffer becomes " |
651ce16a | 693 | "full (record full stop-at-limit)?"))) |
7ee70bf5 | 694 | error (_("Process record: stopped by user.")); |
651ce16a | 695 | record_full_stop_at_limit = 0; |
d02ed0bb MM |
696 | } |
697 | } | |
698 | } | |
699 | ||
d02ed0bb MM |
700 | /* Before inferior step (when GDB record the running message, inferior |
701 | only can step), GDB will call this function to record the values to | |
88d1aa9d | 702 | record_full_list. This function will call gdbarch_process_record to |
d02ed0bb | 703 | record the running message of inferior and set them to |
88d1aa9d | 704 | record_full_arch_list, and add it to record_full_list. */ |
d02ed0bb | 705 | |
bf469271 | 706 | static void |
88d1aa9d | 707 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
708 | { |
709 | int ret; | |
ac7936df | 710 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb | 711 | |
a70b8144 | 712 | try |
1ddbba9d TT |
713 | { |
714 | record_full_arch_list_head = NULL; | |
715 | record_full_arch_list_tail = NULL; | |
d02ed0bb | 716 | |
1ddbba9d TT |
717 | /* Check record_full_insn_num. */ |
718 | record_full_check_insn_num (); | |
719 | ||
720 | /* If gdb sends a signal value to target_resume, | |
721 | save it in the 'end' field of the previous instruction. | |
d02ed0bb | 722 | |
1ddbba9d TT |
723 | Maybe process record should record what really happened, |
724 | rather than what gdb pretends has happened. | |
d02ed0bb | 725 | |
1ddbba9d TT |
726 | So if Linux delivered the signal to the child process during |
727 | the record mode, we will record it and deliver it again in | |
728 | the replay mode. | |
d02ed0bb | 729 | |
1ddbba9d TT |
730 | If user says "ignore this signal" during the record mode, then |
731 | it will be ignored again during the replay mode (no matter if | |
732 | the user says something different, like "deliver this signal" | |
733 | during the replay mode). | |
d02ed0bb | 734 | |
1ddbba9d TT |
735 | User should understand that nothing he does during the replay |
736 | mode will change the behavior of the child. If he tries, | |
737 | then that is a user error. | |
d02ed0bb | 738 | |
1ddbba9d TT |
739 | But we should still deliver the signal to gdb during the replay, |
740 | if we delivered it during the recording. Therefore we should | |
741 | record the signal during record_full_wait, not | |
742 | record_full_resume. */ | |
743 | if (record_full_list != &record_full_first) /* FIXME better way | |
744 | to check */ | |
745 | { | |
746 | gdb_assert (record_full_list->type == record_full_end); | |
747 | record_full_list->u.end.sigval = signal; | |
748 | } | |
d02ed0bb | 749 | |
1ddbba9d TT |
750 | if (signal == GDB_SIGNAL_0 |
751 | || !gdbarch_process_record_signal_p (gdbarch)) | |
752 | ret = gdbarch_process_record (gdbarch, | |
753 | regcache, | |
754 | regcache_read_pc (regcache)); | |
755 | else | |
756 | ret = gdbarch_process_record_signal (gdbarch, | |
757 | regcache, | |
758 | signal); | |
759 | ||
760 | if (ret > 0) | |
761 | error (_("Process record: inferior program stopped.")); | |
762 | if (ret < 0) | |
763 | error (_("Process record: failed to record execution log.")); | |
764 | } | |
230d2906 | 765 | catch (const gdb_exception &ex) |
d02ed0bb | 766 | { |
1ddbba9d | 767 | record_full_list_release (record_full_arch_list_tail); |
eedc3f4f | 768 | throw; |
d02ed0bb | 769 | } |
d02ed0bb | 770 | |
88d1aa9d MM |
771 | record_full_list->next = record_full_arch_list_head; |
772 | record_full_arch_list_head->prev = record_full_list; | |
773 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 774 | |
7ee70bf5 | 775 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 776 | record_full_list_release_first (); |
d02ed0bb | 777 | else |
88d1aa9d | 778 | record_full_insn_num++; |
d02ed0bb MM |
779 | } |
780 | ||
bf469271 | 781 | static bool |
88d1aa9d MM |
782 | record_full_message_wrapper_safe (struct regcache *regcache, |
783 | enum gdb_signal signal) | |
d02ed0bb | 784 | { |
a70b8144 | 785 | try |
bf469271 PA |
786 | { |
787 | record_full_message (regcache, signal); | |
788 | } | |
230d2906 | 789 | catch (const gdb_exception &ex) |
bf469271 PA |
790 | { |
791 | exception_print (gdb_stderr, ex); | |
792 | return false; | |
793 | } | |
d02ed0bb | 794 | |
bf469271 | 795 | return true; |
d02ed0bb MM |
796 | } |
797 | ||
88d1aa9d | 798 | /* Set to 1 if record_full_store_registers and record_full_xfer_partial |
d02ed0bb MM |
799 | doesn't need record. */ |
800 | ||
88d1aa9d | 801 | static int record_full_gdb_operation_disable = 0; |
d02ed0bb | 802 | |
07036511 | 803 | scoped_restore_tmpl<int> |
25ea693b | 804 | record_full_gdb_operation_disable_set (void) |
d02ed0bb | 805 | { |
07036511 | 806 | return make_scoped_restore (&record_full_gdb_operation_disable, 1); |
d02ed0bb MM |
807 | } |
808 | ||
809 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ | |
9e8915c6 PA |
810 | static enum target_stop_reason record_full_stop_reason |
811 | = TARGET_STOPPED_BY_NO_REASON; | |
d02ed0bb MM |
812 | |
813 | /* Execute one instruction from the record log. Each instruction in | |
814 | the log will be represented by an arbitrary sequence of register | |
815 | entries and memory entries, followed by an 'end' entry. */ | |
816 | ||
817 | static inline void | |
88d1aa9d MM |
818 | record_full_exec_insn (struct regcache *regcache, |
819 | struct gdbarch *gdbarch, | |
820 | struct record_full_entry *entry) | |
d02ed0bb MM |
821 | { |
822 | switch (entry->type) | |
823 | { | |
88d1aa9d | 824 | case record_full_reg: /* reg */ |
d02ed0bb | 825 | { |
d7dcbefc | 826 | gdb::byte_vector reg (entry->u.reg.len); |
d02ed0bb MM |
827 | |
828 | if (record_debug > 1) | |
829 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 830 | "Process record: record_full_reg %s to " |
d02ed0bb MM |
831 | "inferior num = %d.\n", |
832 | host_address_to_string (entry), | |
833 | entry->u.reg.num); | |
834 | ||
dca08e1f | 835 | regcache->cooked_read (entry->u.reg.num, reg.data ()); |
b66f5587 | 836 | regcache->cooked_write (entry->u.reg.num, record_full_get_loc (entry)); |
d7dcbefc | 837 | memcpy (record_full_get_loc (entry), reg.data (), entry->u.reg.len); |
d02ed0bb MM |
838 | } |
839 | break; | |
840 | ||
88d1aa9d | 841 | case record_full_mem: /* mem */ |
d02ed0bb MM |
842 | { |
843 | /* Nothing to do if the entry is flagged not_accessible. */ | |
844 | if (!entry->u.mem.mem_entry_not_accessible) | |
845 | { | |
a2b2bc12 | 846 | gdb::byte_vector mem (entry->u.mem.len); |
d02ed0bb MM |
847 | |
848 | if (record_debug > 1) | |
849 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 850 | "Process record: record_full_mem %s to " |
d02ed0bb MM |
851 | "inferior addr = %s len = %d.\n", |
852 | host_address_to_string (entry), | |
853 | paddress (gdbarch, entry->u.mem.addr), | |
854 | entry->u.mem.len); | |
855 | ||
856 | if (record_read_memory (gdbarch, | |
a2b2bc12 TT |
857 | entry->u.mem.addr, mem.data (), |
858 | entry->u.mem.len)) | |
d02ed0bb MM |
859 | entry->u.mem.mem_entry_not_accessible = 1; |
860 | else | |
861 | { | |
862 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 863 | record_full_get_loc (entry), |
d02ed0bb MM |
864 | entry->u.mem.len)) |
865 | { | |
866 | entry->u.mem.mem_entry_not_accessible = 1; | |
867 | if (record_debug) | |
868 | warning (_("Process record: error writing memory at " | |
869 | "addr = %s len = %d."), | |
870 | paddress (gdbarch, entry->u.mem.addr), | |
871 | entry->u.mem.len); | |
872 | } | |
873 | else | |
874 | { | |
a2b2bc12 | 875 | memcpy (record_full_get_loc (entry), mem.data (), |
88d1aa9d | 876 | entry->u.mem.len); |
d02ed0bb MM |
877 | |
878 | /* We've changed memory --- check if a hardware | |
879 | watchpoint should trap. Note that this | |
880 | presently assumes the target beneath supports | |
881 | continuable watchpoints. On non-continuable | |
882 | watchpoints target, we'll want to check this | |
883 | _before_ actually doing the memory change, and | |
884 | not doing the change at all if the watchpoint | |
885 | traps. */ | |
886 | if (hardware_watchpoint_inserted_in_range | |
a01bda52 | 887 | (regcache->aspace (), |
d02ed0bb | 888 | entry->u.mem.addr, entry->u.mem.len)) |
9e8915c6 | 889 | record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb MM |
890 | } |
891 | } | |
892 | } | |
893 | } | |
894 | break; | |
895 | } | |
896 | } | |
897 | ||
88d1aa9d | 898 | static void record_full_restore (void); |
d02ed0bb MM |
899 | |
900 | /* Asynchronous signal handle registered as event loop source for when | |
901 | we have pending events ready to be passed to the core. */ | |
902 | ||
88d1aa9d | 903 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
904 | |
905 | static void | |
88d1aa9d | 906 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb MM |
907 | { |
908 | inferior_event_handler (INF_REG_EVENT, NULL); | |
909 | } | |
910 | ||
d9f719f1 | 911 | /* Open the process record target for 'core' files. */ |
d02ed0bb MM |
912 | |
913 | static void | |
014f9477 | 914 | record_full_core_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
915 | { |
916 | struct regcache *regcache = get_current_regcache (); | |
ac7936df | 917 | int regnum = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
918 | int i; |
919 | ||
88d1aa9d | 920 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 921 | target_fetch_registers (regcache, -1); |
c8ec2f33 YQ |
922 | record_full_core_regbuf = new detached_regcache (regcache->arch (), false); |
923 | ||
d02ed0bb | 924 | for (i = 0; i < regnum; i ++) |
c8ec2f33 | 925 | record_full_core_regbuf->raw_supply (i, *regcache); |
d02ed0bb | 926 | |
88d1aa9d MM |
927 | /* Get record_full_core_start and record_full_core_end. */ |
928 | if (build_section_table (core_bfd, &record_full_core_start, | |
929 | &record_full_core_end)) | |
d02ed0bb | 930 | { |
c8ec2f33 | 931 | delete record_full_core_regbuf; |
88d1aa9d | 932 | record_full_core_regbuf = NULL; |
d02ed0bb MM |
933 | error (_("\"%s\": Can't find sections: %s"), |
934 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
935 | } | |
936 | ||
88d1aa9d MM |
937 | push_target (&record_full_core_ops); |
938 | record_full_restore (); | |
d02ed0bb MM |
939 | } |
940 | ||
d9f719f1 | 941 | /* Open the process record target for 'live' processes. */ |
d02ed0bb MM |
942 | |
943 | static void | |
014f9477 | 944 | record_full_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
945 | { |
946 | if (record_debug) | |
0a0640e3 | 947 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open_1\n"); |
d02ed0bb MM |
948 | |
949 | /* check exec */ | |
950 | if (!target_has_execution) | |
951 | error (_("Process record: the program is not being run.")); | |
952 | if (non_stop) | |
953 | error (_("Process record target can't debug inferior in non-stop mode " | |
954 | "(non-stop).")); | |
955 | ||
956 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
957 | error (_("Process record: the current architecture doesn't support " | |
958 | "record function.")); | |
959 | ||
88d1aa9d | 960 | push_target (&record_full_ops); |
d02ed0bb MM |
961 | } |
962 | ||
88d1aa9d | 963 | static void record_full_init_record_breakpoints (void); |
d02ed0bb | 964 | |
d9f719f1 | 965 | /* Open the process record target. */ |
d02ed0bb | 966 | |
d9f719f1 PA |
967 | static void |
968 | record_full_open (const char *name, int from_tty) | |
d02ed0bb | 969 | { |
d02ed0bb | 970 | if (record_debug) |
88d1aa9d | 971 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 972 | |
8213266a | 973 | record_preopen (); |
d02ed0bb | 974 | |
d02ed0bb | 975 | /* Reset */ |
88d1aa9d MM |
976 | record_full_insn_num = 0; |
977 | record_full_insn_count = 0; | |
978 | record_full_list = &record_full_first; | |
979 | record_full_list->next = NULL; | |
d02ed0bb | 980 | |
d02ed0bb | 981 | if (core_bfd) |
88d1aa9d | 982 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 983 | else |
88d1aa9d | 984 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
985 | |
986 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
987 | record_full_async_inferior_event_token |
988 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
d02ed0bb MM |
989 | NULL); |
990 | ||
88d1aa9d | 991 | record_full_init_record_breakpoints (); |
d02ed0bb | 992 | |
76727919 | 993 | gdb::observers::record_changed.notify (current_inferior (), 1, "full", NULL); |
d02ed0bb MM |
994 | } |
995 | ||
f6ac5f3d | 996 | /* "close" target method. Close the process record target. */ |
d02ed0bb | 997 | |
f6ac5f3d PA |
998 | void |
999 | record_full_base_target::close () | |
d02ed0bb | 1000 | { |
88d1aa9d | 1001 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
1002 | |
1003 | if (record_debug) | |
88d1aa9d | 1004 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 1005 | |
88d1aa9d | 1006 | record_full_list_release (record_full_list); |
d02ed0bb | 1007 | |
88d1aa9d MM |
1008 | /* Release record_full_core_regbuf. */ |
1009 | if (record_full_core_regbuf) | |
d02ed0bb | 1010 | { |
c8ec2f33 | 1011 | delete record_full_core_regbuf; |
88d1aa9d | 1012 | record_full_core_regbuf = NULL; |
d02ed0bb MM |
1013 | } |
1014 | ||
88d1aa9d | 1015 | /* Release record_full_core_buf_list. */ |
ec70d8db | 1016 | while (record_full_core_buf_list) |
d02ed0bb | 1017 | { |
ec70d8db PW |
1018 | entry = record_full_core_buf_list; |
1019 | record_full_core_buf_list = record_full_core_buf_list->prev; | |
1020 | xfree (entry); | |
d02ed0bb MM |
1021 | } |
1022 | ||
88d1aa9d MM |
1023 | if (record_full_async_inferior_event_token) |
1024 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
1025 | } |
1026 | ||
f6ac5f3d | 1027 | /* "async" target method. */ |
b7d2e916 | 1028 | |
f6ac5f3d PA |
1029 | void |
1030 | record_full_base_target::async (int enable) | |
b7d2e916 | 1031 | { |
6a3753b3 | 1032 | if (enable) |
b7d2e916 PA |
1033 | mark_async_event_handler (record_full_async_inferior_event_token); |
1034 | else | |
1035 | clear_async_event_handler (record_full_async_inferior_event_token); | |
1036 | ||
b6a8c27b | 1037 | beneath ()->async (enable); |
b7d2e916 PA |
1038 | } |
1039 | ||
ec506636 PA |
1040 | /* The PTID and STEP arguments last passed to |
1041 | record_full_target::resume. */ | |
1042 | static ptid_t record_full_resume_ptid = null_ptid; | |
88d1aa9d | 1043 | static int record_full_resume_step = 0; |
d02ed0bb | 1044 | |
88d1aa9d MM |
1045 | /* True if we've been resumed, and so each record_full_wait call should |
1046 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 1047 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 1048 | static int record_full_resumed = 0; |
d02ed0bb MM |
1049 | |
1050 | /* The execution direction of the last resume we got. This is | |
1051 | necessary for async mode. Vis (order is not strictly accurate): | |
1052 | ||
1053 | 1. user has the global execution direction set to forward | |
1054 | 2. user does a reverse-step command | |
88d1aa9d | 1055 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
1056 | temporarily switched to reverse |
1057 | 4. GDB's execution direction is reverted back to forward | |
1058 | 5. target record notifies event loop there's an event to handle | |
1059 | 6. infrun asks the target which direction was it going, and switches | |
1060 | the global execution direction accordingly (to reverse) | |
1061 | 7. infrun polls an event out of the record target, and handles it | |
1062 | 8. GDB goes back to the event loop, and goto #4. | |
1063 | */ | |
88d1aa9d | 1064 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb | 1065 | |
f6ac5f3d | 1066 | /* "resume" target method. Resume the process record target. */ |
d02ed0bb | 1067 | |
f6ac5f3d PA |
1068 | void |
1069 | record_full_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
d02ed0bb | 1070 | { |
ec506636 | 1071 | record_full_resume_ptid = inferior_ptid; |
88d1aa9d MM |
1072 | record_full_resume_step = step; |
1073 | record_full_resumed = 1; | |
f6ac5f3d | 1074 | record_full_execution_dir = ::execution_direction; |
d02ed0bb | 1075 | |
88d1aa9d | 1076 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1077 | { |
1078 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
1079 | ||
88d1aa9d | 1080 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
1081 | |
1082 | if (!step) | |
1083 | { | |
1084 | /* This is not hard single step. */ | |
1085 | if (!gdbarch_software_single_step_p (gdbarch)) | |
1086 | { | |
1087 | /* This is a normal continue. */ | |
1088 | step = 1; | |
1089 | } | |
1090 | else | |
1091 | { | |
8ce9efb0 | 1092 | /* This arch supports soft single step. */ |
34b7e8a6 | 1093 | if (thread_has_single_step_breakpoints_set (inferior_thread ())) |
d02ed0bb MM |
1094 | { |
1095 | /* This is a soft single step. */ | |
88d1aa9d | 1096 | record_full_resume_step = 1; |
d02ed0bb MM |
1097 | } |
1098 | else | |
93f9a11f | 1099 | step = !insert_single_step_breakpoints (gdbarch); |
d02ed0bb MM |
1100 | } |
1101 | } | |
1102 | ||
1103 | /* Make sure the target beneath reports all signals. */ | |
adc6a863 | 1104 | target_pass_signals ({}); |
d02ed0bb | 1105 | |
b6a8c27b | 1106 | this->beneath ()->resume (ptid, step, signal); |
d02ed0bb MM |
1107 | } |
1108 | ||
1109 | /* We are about to start executing the inferior (or simulate it), | |
1110 | let's register it with the event loop. */ | |
1111 | if (target_can_async_p ()) | |
6a3753b3 | 1112 | target_async (1); |
d02ed0bb MM |
1113 | } |
1114 | ||
f6ac5f3d | 1115 | /* "commit_resume" method for process record target. */ |
85ad3aaf | 1116 | |
f6ac5f3d PA |
1117 | void |
1118 | record_full_target::commit_resume () | |
85ad3aaf PA |
1119 | { |
1120 | if (!RECORD_FULL_IS_REPLAY) | |
b6a8c27b | 1121 | beneath ()->commit_resume (); |
85ad3aaf PA |
1122 | } |
1123 | ||
88d1aa9d | 1124 | static int record_full_get_sig = 0; |
d02ed0bb | 1125 | |
f6ac5f3d | 1126 | /* SIGINT signal handler, registered by "wait" method. */ |
d02ed0bb MM |
1127 | |
1128 | static void | |
88d1aa9d | 1129 | record_full_sig_handler (int signo) |
d02ed0bb MM |
1130 | { |
1131 | if (record_debug) | |
1132 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1133 | ||
1134 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 1135 | record_full_resume_step = 1; |
d02ed0bb | 1136 | |
88d1aa9d | 1137 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1138 | SIGINT. */ |
88d1aa9d | 1139 | record_full_get_sig = 1; |
d02ed0bb MM |
1140 | } |
1141 | ||
f6ac5f3d | 1142 | /* "wait" target method for process record target. |
d02ed0bb MM |
1143 | |
1144 | In record mode, the target is always run in singlestep mode | |
f6ac5f3d | 1145 | (even when gdb says to continue). The wait method intercepts |
d02ed0bb MM |
1146 | the stop events and determines which ones are to be passed on to |
1147 | gdb. Most stop events are just singlestep events that gdb is not | |
f6ac5f3d | 1148 | to know about, so the wait method just records them and keeps |
d02ed0bb MM |
1149 | singlestepping. |
1150 | ||
1151 | In replay mode, this function emulates the recorded execution log, | |
1152 | one instruction at a time (forward or backward), and determines | |
1153 | where to stop. */ | |
1154 | ||
1155 | static ptid_t | |
88d1aa9d MM |
1156 | record_full_wait_1 (struct target_ops *ops, |
1157 | ptid_t ptid, struct target_waitstatus *status, | |
1158 | int options) | |
d02ed0bb | 1159 | { |
07036511 TT |
1160 | scoped_restore restore_operation_disable |
1161 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
1162 | |
1163 | if (record_debug) | |
1164 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1165 | "Process record: record_full_wait " |
1166 | "record_full_resume_step = %d, " | |
1167 | "record_full_resumed = %d, direction=%s\n", | |
1168 | record_full_resume_step, record_full_resumed, | |
1169 | record_full_execution_dir == EXEC_FORWARD | |
1170 | ? "forward" : "reverse"); | |
1171 | ||
1172 | if (!record_full_resumed) | |
d02ed0bb MM |
1173 | { |
1174 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1175 | ||
1176 | /* No interesting event. */ | |
1177 | status->kind = TARGET_WAITKIND_IGNORE; | |
1178 | return minus_one_ptid; | |
1179 | } | |
1180 | ||
88d1aa9d MM |
1181 | record_full_get_sig = 0; |
1182 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1183 | |
9e8915c6 PA |
1184 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1185 | ||
88d1aa9d | 1186 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1187 | { |
88d1aa9d | 1188 | if (record_full_resume_step) |
d02ed0bb MM |
1189 | { |
1190 | /* This is a single step. */ | |
b6a8c27b | 1191 | return ops->beneath ()->wait (ptid, status, options); |
d02ed0bb MM |
1192 | } |
1193 | else | |
1194 | { | |
1195 | /* This is not a single step. */ | |
1196 | ptid_t ret; | |
1197 | CORE_ADDR tmp_pc; | |
ec506636 PA |
1198 | struct gdbarch *gdbarch |
1199 | = target_thread_architecture (record_full_resume_ptid); | |
d02ed0bb MM |
1200 | |
1201 | while (1) | |
1202 | { | |
b6a8c27b | 1203 | ret = ops->beneath ()->wait (ptid, status, options); |
d02ed0bb MM |
1204 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1205 | { | |
1206 | if (record_debug) | |
1207 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1208 | "Process record: record_full_wait " |
d02ed0bb MM |
1209 | "target beneath not done yet\n"); |
1210 | return ret; | |
1211 | } | |
1212 | ||
08036331 | 1213 | for (thread_info *tp : all_non_exited_threads ()) |
34b7e8a6 | 1214 | delete_single_step_breakpoints (tp); |
d02ed0bb | 1215 | |
88d1aa9d | 1216 | if (record_full_resume_step) |
d02ed0bb MM |
1217 | return ret; |
1218 | ||
1219 | /* Is this a SIGTRAP? */ | |
1220 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1221 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1222 | { | |
1223 | struct regcache *regcache; | |
9e8915c6 PA |
1224 | enum target_stop_reason *stop_reason_p |
1225 | = &record_full_stop_reason; | |
d02ed0bb MM |
1226 | |
1227 | /* Yes -- this is likely our single-step finishing, | |
1228 | but check if there's any reason the core would be | |
1229 | interested in the event. */ | |
1230 | ||
1231 | registers_changed (); | |
5b6d1e4f PA |
1232 | switch_to_thread (current_inferior ()->process_target (), |
1233 | ret); | |
d02ed0bb MM |
1234 | regcache = get_current_regcache (); |
1235 | tmp_pc = regcache_read_pc (regcache); | |
8b86c959 | 1236 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb MM |
1237 | |
1238 | if (target_stopped_by_watchpoint ()) | |
1239 | { | |
1240 | /* Always interested in watchpoints. */ | |
1241 | } | |
9e8915c6 PA |
1242 | else if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1243 | stop_reason_p)) | |
d02ed0bb MM |
1244 | { |
1245 | /* There is a breakpoint here. Let the core | |
1246 | handle it. */ | |
d02ed0bb MM |
1247 | } |
1248 | else | |
1249 | { | |
1250 | /* This is a single-step trap. Record the | |
1251 | insn and issue another step. | |
1252 | FIXME: this part can be a random SIGTRAP too. | |
1253 | But GDB cannot handle it. */ | |
1254 | int step = 1; | |
1255 | ||
88d1aa9d MM |
1256 | if (!record_full_message_wrapper_safe (regcache, |
1257 | GDB_SIGNAL_0)) | |
d02ed0bb MM |
1258 | { |
1259 | status->kind = TARGET_WAITKIND_STOPPED; | |
1260 | status->value.sig = GDB_SIGNAL_0; | |
1261 | break; | |
1262 | } | |
1263 | ||
1264 | if (gdbarch_software_single_step_p (gdbarch)) | |
1265 | { | |
5b6d1e4f PA |
1266 | process_stratum_target *proc_target |
1267 | = current_inferior ()->process_target (); | |
1268 | ||
d02ed0bb MM |
1269 | /* Try to insert the software single step breakpoint. |
1270 | If insert success, set step to 0. */ | |
719546c4 | 1271 | set_executing (proc_target, inferior_ptid, false); |
d02ed0bb | 1272 | reinit_frame_cache (); |
93f9a11f YQ |
1273 | |
1274 | step = !insert_single_step_breakpoints (gdbarch); | |
1275 | ||
719546c4 | 1276 | set_executing (proc_target, inferior_ptid, true); |
d02ed0bb MM |
1277 | } |
1278 | ||
1279 | if (record_debug) | |
1280 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1281 | "Process record: record_full_wait " |
1282 | "issuing one more step in the " | |
1283 | "target beneath\n"); | |
b6a8c27b PA |
1284 | ops->beneath ()->resume (ptid, step, GDB_SIGNAL_0); |
1285 | ops->beneath ()->commit_resume (); | |
d02ed0bb MM |
1286 | continue; |
1287 | } | |
1288 | } | |
1289 | ||
1290 | /* The inferior is broken by a breakpoint or a signal. */ | |
1291 | break; | |
1292 | } | |
1293 | ||
1294 | return ret; | |
1295 | } | |
1296 | } | |
1297 | else | |
1298 | { | |
5b6d1e4f PA |
1299 | switch_to_thread (current_inferior ()->process_target (), |
1300 | record_full_resume_ptid); | |
d02ed0bb | 1301 | struct regcache *regcache = get_current_regcache (); |
ac7936df | 1302 | struct gdbarch *gdbarch = regcache->arch (); |
8b86c959 | 1303 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb | 1304 | int continue_flag = 1; |
88d1aa9d | 1305 | int first_record_full_end = 1; |
d02ed0bb | 1306 | |
a70b8144 | 1307 | try |
d02ed0bb | 1308 | { |
1ddbba9d | 1309 | CORE_ADDR tmp_pc; |
d02ed0bb | 1310 | |
1ddbba9d TT |
1311 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1312 | status->kind = TARGET_WAITKIND_STOPPED; | |
d02ed0bb | 1313 | |
1ddbba9d TT |
1314 | /* Check breakpoint when forward execute. */ |
1315 | if (execution_direction == EXEC_FORWARD) | |
d02ed0bb | 1316 | { |
1ddbba9d TT |
1317 | tmp_pc = regcache_read_pc (regcache); |
1318 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, | |
1319 | &record_full_stop_reason)) | |
1320 | { | |
1321 | if (record_debug) | |
1322 | fprintf_unfiltered (gdb_stdlog, | |
1323 | "Process record: break at %s.\n", | |
1324 | paddress (gdbarch, tmp_pc)); | |
1325 | goto replay_out; | |
1326 | } | |
d02ed0bb MM |
1327 | } |
1328 | ||
1ddbba9d TT |
1329 | /* If GDB is in terminal_inferior mode, it will not get the |
1330 | signal. And in GDB replay mode, GDB doesn't need to be | |
1331 | in terminal_inferior mode, because inferior will not | |
1332 | executed. Then set it to terminal_ours to make GDB get | |
1333 | the signal. */ | |
1334 | target_terminal::ours (); | |
1335 | ||
1336 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev | |
1337 | instruction. */ | |
1338 | if (execution_direction == EXEC_FORWARD && record_full_list->next) | |
1339 | record_full_list = record_full_list->next; | |
1340 | ||
1341 | /* Loop over the record_full_list, looking for the next place to | |
1342 | stop. */ | |
1343 | do | |
d02ed0bb | 1344 | { |
1ddbba9d TT |
1345 | /* Check for beginning and end of log. */ |
1346 | if (execution_direction == EXEC_REVERSE | |
1347 | && record_full_list == &record_full_first) | |
d02ed0bb | 1348 | { |
1ddbba9d TT |
1349 | /* Hit beginning of record log in reverse. */ |
1350 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1351 | break; | |
d02ed0bb | 1352 | } |
1ddbba9d TT |
1353 | if (execution_direction != EXEC_REVERSE |
1354 | && !record_full_list->next) | |
1355 | { | |
1356 | /* Hit end of record log going forward. */ | |
1357 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1358 | break; | |
1359 | } | |
1360 | ||
1361 | record_full_exec_insn (regcache, gdbarch, record_full_list); | |
1362 | ||
1363 | if (record_full_list->type == record_full_end) | |
d02ed0bb | 1364 | { |
1ddbba9d TT |
1365 | if (record_debug > 1) |
1366 | fprintf_unfiltered | |
1367 | (gdb_stdlog, | |
1368 | "Process record: record_full_end %s to " | |
1369 | "inferior.\n", | |
1370 | host_address_to_string (record_full_list)); | |
1371 | ||
1372 | if (first_record_full_end | |
1373 | && execution_direction == EXEC_REVERSE) | |
d02ed0bb | 1374 | { |
85102364 | 1375 | /* When reverse execute, the first |
1ddbba9d TT |
1376 | record_full_end is the part of current |
1377 | instruction. */ | |
1378 | first_record_full_end = 0; | |
d02ed0bb | 1379 | } |
1ddbba9d | 1380 | else |
d02ed0bb | 1381 | { |
1ddbba9d TT |
1382 | /* In EXEC_REVERSE mode, this is the |
1383 | record_full_end of prev instruction. In | |
1384 | EXEC_FORWARD mode, this is the | |
1385 | record_full_end of current instruction. */ | |
1386 | /* step */ | |
1387 | if (record_full_resume_step) | |
1388 | { | |
1389 | if (record_debug > 1) | |
1390 | fprintf_unfiltered (gdb_stdlog, | |
1391 | "Process record: step.\n"); | |
1392 | continue_flag = 0; | |
1393 | } | |
9e8915c6 | 1394 | |
1ddbba9d TT |
1395 | /* check breakpoint */ |
1396 | tmp_pc = regcache_read_pc (regcache); | |
1397 | if (record_check_stopped_by_breakpoint | |
1398 | (aspace, tmp_pc, &record_full_stop_reason)) | |
1399 | { | |
1400 | if (record_debug) | |
1401 | fprintf_unfiltered (gdb_stdlog, | |
1402 | "Process record: break " | |
1403 | "at %s.\n", | |
1404 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb | 1405 | |
1ddbba9d TT |
1406 | continue_flag = 0; |
1407 | } | |
1408 | ||
1409 | if (record_full_stop_reason | |
1410 | == TARGET_STOPPED_BY_WATCHPOINT) | |
1411 | { | |
1412 | if (record_debug) | |
1413 | fprintf_unfiltered (gdb_stdlog, | |
1414 | "Process record: hit hw " | |
1415 | "watchpoint.\n"); | |
1416 | continue_flag = 0; | |
1417 | } | |
1418 | /* Check target signal */ | |
1419 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) | |
1420 | /* FIXME: better way to check */ | |
1421 | continue_flag = 0; | |
d02ed0bb | 1422 | } |
d02ed0bb | 1423 | } |
d02ed0bb | 1424 | |
1ddbba9d | 1425 | if (continue_flag) |
d02ed0bb | 1426 | { |
1ddbba9d TT |
1427 | if (execution_direction == EXEC_REVERSE) |
1428 | { | |
1429 | if (record_full_list->prev) | |
1430 | record_full_list = record_full_list->prev; | |
1431 | } | |
1432 | else | |
1433 | { | |
1434 | if (record_full_list->next) | |
1435 | record_full_list = record_full_list->next; | |
1436 | } | |
d02ed0bb MM |
1437 | } |
1438 | } | |
1ddbba9d TT |
1439 | while (continue_flag); |
1440 | ||
1441 | replay_out: | |
1442 | if (record_full_get_sig) | |
1443 | status->value.sig = GDB_SIGNAL_INT; | |
1444 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) | |
1445 | /* FIXME: better way to check */ | |
1446 | status->value.sig = record_full_list->u.end.sigval; | |
1447 | else | |
1448 | status->value.sig = GDB_SIGNAL_TRAP; | |
d02ed0bb | 1449 | } |
230d2906 | 1450 | catch (const gdb_exception &ex) |
1ddbba9d TT |
1451 | { |
1452 | if (execution_direction == EXEC_REVERSE) | |
1453 | { | |
1454 | if (record_full_list->next) | |
1455 | record_full_list = record_full_list->next; | |
1456 | } | |
1457 | else | |
1458 | record_full_list = record_full_list->prev; | |
d02ed0bb | 1459 | |
eedc3f4f | 1460 | throw; |
1ddbba9d | 1461 | } |
d02ed0bb MM |
1462 | } |
1463 | ||
1464 | signal (SIGINT, handle_sigint); | |
1465 | ||
d02ed0bb MM |
1466 | return inferior_ptid; |
1467 | } | |
1468 | ||
f6ac5f3d PA |
1469 | ptid_t |
1470 | record_full_base_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
1471 | int options) | |
d02ed0bb MM |
1472 | { |
1473 | ptid_t return_ptid; | |
1474 | ||
f6ac5f3d | 1475 | return_ptid = record_full_wait_1 (this, ptid, status, options); |
d02ed0bb MM |
1476 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1477 | { | |
1478 | /* We're reporting a stop. Make sure any spurious | |
1479 | target_wait(WNOHANG) doesn't advance the target until the | |
1480 | core wants us resumed again. */ | |
88d1aa9d | 1481 | record_full_resumed = 0; |
d02ed0bb MM |
1482 | } |
1483 | return return_ptid; | |
1484 | } | |
1485 | ||
57810aa7 | 1486 | bool |
f6ac5f3d | 1487 | record_full_base_target::stopped_by_watchpoint () |
d02ed0bb | 1488 | { |
88d1aa9d | 1489 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1490 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1491 | else |
b6a8c27b | 1492 | return beneath ()->stopped_by_watchpoint (); |
d02ed0bb MM |
1493 | } |
1494 | ||
57810aa7 | 1495 | bool |
f6ac5f3d | 1496 | record_full_base_target::stopped_data_address (CORE_ADDR *addr_p) |
d02ed0bb | 1497 | { |
88d1aa9d | 1498 | if (RECORD_FULL_IS_REPLAY) |
57810aa7 | 1499 | return false; |
d02ed0bb | 1500 | else |
b6a8c27b | 1501 | return this->beneath ()->stopped_data_address (addr_p); |
d02ed0bb MM |
1502 | } |
1503 | ||
f6ac5f3d | 1504 | /* The stopped_by_sw_breakpoint method of target record-full. */ |
9e8915c6 | 1505 | |
57810aa7 | 1506 | bool |
f6ac5f3d | 1507 | record_full_base_target::stopped_by_sw_breakpoint () |
9e8915c6 PA |
1508 | { |
1509 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1510 | } | |
1511 | ||
f6ac5f3d | 1512 | /* The supports_stopped_by_sw_breakpoint method of target |
9e8915c6 PA |
1513 | record-full. */ |
1514 | ||
57810aa7 | 1515 | bool |
f6ac5f3d | 1516 | record_full_base_target::supports_stopped_by_sw_breakpoint () |
9e8915c6 | 1517 | { |
57810aa7 | 1518 | return true; |
9e8915c6 PA |
1519 | } |
1520 | ||
f6ac5f3d | 1521 | /* The stopped_by_hw_breakpoint method of target record-full. */ |
9e8915c6 | 1522 | |
57810aa7 | 1523 | bool |
f6ac5f3d | 1524 | record_full_base_target::stopped_by_hw_breakpoint () |
9e8915c6 PA |
1525 | { |
1526 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
1527 | } | |
1528 | ||
f6ac5f3d | 1529 | /* The supports_stopped_by_sw_breakpoint method of target |
9e8915c6 PA |
1530 | record-full. */ |
1531 | ||
57810aa7 | 1532 | bool |
f6ac5f3d | 1533 | record_full_base_target::supports_stopped_by_hw_breakpoint () |
9e8915c6 | 1534 | { |
57810aa7 | 1535 | return true; |
9e8915c6 PA |
1536 | } |
1537 | ||
d02ed0bb MM |
1538 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1539 | ||
1540 | static void | |
88d1aa9d | 1541 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1542 | { |
88d1aa9d | 1543 | /* Check record_full_insn_num. */ |
651ce16a | 1544 | record_full_check_insn_num (); |
d02ed0bb | 1545 | |
88d1aa9d MM |
1546 | record_full_arch_list_head = NULL; |
1547 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1548 | |
1549 | if (regnum < 0) | |
1550 | { | |
1551 | int i; | |
1552 | ||
ac7936df | 1553 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
d02ed0bb | 1554 | { |
25ea693b | 1555 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1556 | { |
88d1aa9d | 1557 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1558 | error (_("Process record: failed to record execution log.")); |
1559 | } | |
1560 | } | |
1561 | } | |
1562 | else | |
1563 | { | |
25ea693b | 1564 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1565 | { |
88d1aa9d | 1566 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1567 | error (_("Process record: failed to record execution log.")); |
1568 | } | |
1569 | } | |
25ea693b | 1570 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1571 | { |
88d1aa9d | 1572 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1573 | error (_("Process record: failed to record execution log.")); |
1574 | } | |
88d1aa9d MM |
1575 | record_full_list->next = record_full_arch_list_head; |
1576 | record_full_arch_list_head->prev = record_full_list; | |
1577 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1578 | |
7ee70bf5 | 1579 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1580 | record_full_list_release_first (); |
d02ed0bb | 1581 | else |
88d1aa9d | 1582 | record_full_insn_num++; |
d02ed0bb MM |
1583 | } |
1584 | ||
f6ac5f3d | 1585 | /* "store_registers" method for process record target. */ |
d02ed0bb | 1586 | |
f6ac5f3d PA |
1587 | void |
1588 | record_full_target::store_registers (struct regcache *regcache, int regno) | |
d02ed0bb | 1589 | { |
88d1aa9d | 1590 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1591 | { |
88d1aa9d | 1592 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1593 | { |
1594 | int n; | |
1595 | ||
1596 | /* Let user choose if he wants to write register or not. */ | |
1597 | if (regno < 0) | |
1598 | n = | |
1599 | query (_("Because GDB is in replay mode, changing the " | |
1600 | "value of a register will make the execution " | |
1601 | "log unusable from this point onward. " | |
1602 | "Change all registers?")); | |
1603 | else | |
1604 | n = | |
1605 | query (_("Because GDB is in replay mode, changing the value " | |
1606 | "of a register will make the execution log unusable " | |
1607 | "from this point onward. Change register %s?"), | |
ac7936df | 1608 | gdbarch_register_name (regcache->arch (), |
d02ed0bb MM |
1609 | regno)); |
1610 | ||
1611 | if (!n) | |
1612 | { | |
1613 | /* Invalidate the value of regcache that was set in function | |
1614 | "regcache_raw_write". */ | |
1615 | if (regno < 0) | |
1616 | { | |
1617 | int i; | |
1618 | ||
1619 | for (i = 0; | |
ac7936df | 1620 | i < gdbarch_num_regs (regcache->arch ()); |
d02ed0bb | 1621 | i++) |
6aa7d724 | 1622 | regcache->invalidate (i); |
d02ed0bb MM |
1623 | } |
1624 | else | |
6aa7d724 | 1625 | regcache->invalidate (regno); |
d02ed0bb MM |
1626 | |
1627 | error (_("Process record canceled the operation.")); | |
1628 | } | |
1629 | ||
1630 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1631 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1632 | } |
1633 | ||
88d1aa9d | 1634 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1635 | } |
b6a8c27b | 1636 | this->beneath ()->store_registers (regcache, regno); |
d02ed0bb MM |
1637 | } |
1638 | ||
f6ac5f3d | 1639 | /* "xfer_partial" method. Behavior is conditional on |
88d1aa9d | 1640 | RECORD_FULL_IS_REPLAY. |
d02ed0bb MM |
1641 | In replay mode, we cannot write memory unles we are willing to |
1642 | invalidate the record/replay log from this point forward. */ | |
1643 | ||
f6ac5f3d PA |
1644 | enum target_xfer_status |
1645 | record_full_target::xfer_partial (enum target_object object, | |
1646 | const char *annex, gdb_byte *readbuf, | |
1647 | const gdb_byte *writebuf, ULONGEST offset, | |
1648 | ULONGEST len, ULONGEST *xfered_len) | |
d02ed0bb | 1649 | { |
88d1aa9d | 1650 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1651 | && (object == TARGET_OBJECT_MEMORY |
1652 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1653 | { | |
88d1aa9d | 1654 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1655 | { |
1656 | /* Let user choose if he wants to write memory or not. */ | |
1657 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
1658 | "will make the execution log unusable from this " | |
1659 | "point onward. Write memory at address %s?"), | |
1660 | paddress (target_gdbarch (), offset))) | |
1661 | error (_("Process record canceled the operation.")); | |
1662 | ||
1663 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1664 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1665 | } |
1666 | ||
88d1aa9d | 1667 | /* Check record_full_insn_num */ |
651ce16a | 1668 | record_full_check_insn_num (); |
d02ed0bb MM |
1669 | |
1670 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1671 | record_full_arch_list_head = NULL; |
1672 | record_full_arch_list_tail = NULL; | |
25ea693b | 1673 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1674 | { |
88d1aa9d | 1675 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1676 | if (record_debug) |
1677 | fprintf_unfiltered (gdb_stdlog, | |
1678 | "Process record: failed to record " | |
1679 | "execution log."); | |
2ed4b548 | 1680 | return TARGET_XFER_E_IO; |
d02ed0bb | 1681 | } |
25ea693b | 1682 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1683 | { |
88d1aa9d | 1684 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1685 | if (record_debug) |
1686 | fprintf_unfiltered (gdb_stdlog, | |
1687 | "Process record: failed to record " | |
1688 | "execution log."); | |
2ed4b548 | 1689 | return TARGET_XFER_E_IO; |
d02ed0bb | 1690 | } |
88d1aa9d MM |
1691 | record_full_list->next = record_full_arch_list_head; |
1692 | record_full_arch_list_head->prev = record_full_list; | |
1693 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1694 | |
7ee70bf5 | 1695 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1696 | record_full_list_release_first (); |
d02ed0bb | 1697 | else |
88d1aa9d | 1698 | record_full_insn_num++; |
d02ed0bb MM |
1699 | } |
1700 | ||
b6a8c27b PA |
1701 | return this->beneath ()->xfer_partial (object, annex, readbuf, writebuf, |
1702 | offset, len, xfered_len); | |
d02ed0bb MM |
1703 | } |
1704 | ||
1705 | /* This structure represents a breakpoint inserted while the record | |
1706 | target is active. We use this to know when to install/remove | |
1707 | breakpoints in/from the target beneath. For example, a breakpoint | |
1708 | may be inserted while recording, but removed when not replaying nor | |
1709 | recording. In that case, the breakpoint had not been inserted on | |
1710 | the target beneath, so we should not try to remove it there. */ | |
1711 | ||
88d1aa9d | 1712 | struct record_full_breakpoint |
d02ed0bb | 1713 | { |
219605fd TT |
1714 | record_full_breakpoint (struct address_space *address_space_, |
1715 | CORE_ADDR addr_, | |
1716 | bool in_target_beneath_) | |
1717 | : address_space (address_space_), | |
1718 | addr (addr_), | |
1719 | in_target_beneath (in_target_beneath_) | |
1720 | { | |
1721 | } | |
1722 | ||
d02ed0bb MM |
1723 | /* The address and address space the breakpoint was set at. */ |
1724 | struct address_space *address_space; | |
1725 | CORE_ADDR addr; | |
1726 | ||
1727 | /* True when the breakpoint has been also installed in the target | |
1728 | beneath. This will be false for breakpoints set during replay or | |
1729 | when recording. */ | |
219605fd | 1730 | bool in_target_beneath; |
d02ed0bb MM |
1731 | }; |
1732 | ||
d02ed0bb MM |
1733 | /* The list of breakpoints inserted while the record target is |
1734 | active. */ | |
219605fd | 1735 | static std::vector<record_full_breakpoint> record_full_breakpoints; |
d02ed0bb MM |
1736 | |
1737 | static void | |
88d1aa9d | 1738 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1739 | { |
1740 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1741 | return; | |
1742 | ||
1743 | if (loc->inserted) | |
1744 | { | |
219605fd TT |
1745 | record_full_breakpoints.emplace_back |
1746 | (loc->target_info.placed_address_space, | |
1747 | loc->target_info.placed_address, | |
1748 | 1); | |
d02ed0bb MM |
1749 | } |
1750 | } | |
1751 | ||
88d1aa9d | 1752 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1753 | |
1754 | static void | |
88d1aa9d | 1755 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1756 | { |
219605fd | 1757 | record_full_breakpoints.clear (); |
d02ed0bb | 1758 | |
88d1aa9d | 1759 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1760 | } |
1761 | ||
88d1aa9d | 1762 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1763 | insert or remove breakpoints in the real target when replaying, nor |
1764 | when recording. */ | |
1765 | ||
f6ac5f3d PA |
1766 | int |
1767 | record_full_target::insert_breakpoint (struct gdbarch *gdbarch, | |
1768 | struct bp_target_info *bp_tgt) | |
d02ed0bb | 1769 | { |
219605fd | 1770 | bool in_target_beneath = false; |
d02ed0bb | 1771 | |
88d1aa9d | 1772 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1773 | { |
1774 | /* When recording, we currently always single-step, so we don't | |
1775 | really need to install regular breakpoints in the inferior. | |
1776 | However, we do have to insert software single-step | |
1777 | breakpoints, in case the target can't hardware step. To keep | |
f99bd5f2 | 1778 | things simple, we always insert. */ |
d02ed0bb | 1779 | |
07036511 TT |
1780 | scoped_restore restore_operation_disable |
1781 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 1782 | |
b6a8c27b | 1783 | int ret = this->beneath ()->insert_breakpoint (gdbarch, bp_tgt); |
d02ed0bb MM |
1784 | if (ret != 0) |
1785 | return ret; | |
1786 | ||
219605fd | 1787 | in_target_beneath = true; |
d02ed0bb MM |
1788 | } |
1789 | ||
e390720b YQ |
1790 | /* Use the existing entries if found in order to avoid duplication |
1791 | in record_full_breakpoints. */ | |
1792 | ||
19f3f25f | 1793 | for (const record_full_breakpoint &bp : record_full_breakpoints) |
e390720b | 1794 | { |
219605fd TT |
1795 | if (bp.addr == bp_tgt->placed_address |
1796 | && bp.address_space == bp_tgt->placed_address_space) | |
e390720b | 1797 | { |
219605fd | 1798 | gdb_assert (bp.in_target_beneath == in_target_beneath); |
e390720b YQ |
1799 | return 0; |
1800 | } | |
1801 | } | |
1802 | ||
219605fd TT |
1803 | record_full_breakpoints.emplace_back (bp_tgt->placed_address_space, |
1804 | bp_tgt->placed_address, | |
1805 | in_target_beneath); | |
d02ed0bb MM |
1806 | return 0; |
1807 | } | |
1808 | ||
f6ac5f3d | 1809 | /* "remove_breakpoint" method for process record target. */ |
d02ed0bb | 1810 | |
f6ac5f3d PA |
1811 | int |
1812 | record_full_target::remove_breakpoint (struct gdbarch *gdbarch, | |
1813 | struct bp_target_info *bp_tgt, | |
1814 | enum remove_bp_reason reason) | |
d02ed0bb | 1815 | { |
219605fd TT |
1816 | for (auto iter = record_full_breakpoints.begin (); |
1817 | iter != record_full_breakpoints.end (); | |
1818 | ++iter) | |
d02ed0bb | 1819 | { |
219605fd TT |
1820 | struct record_full_breakpoint &bp = *iter; |
1821 | ||
1822 | if (bp.addr == bp_tgt->placed_address | |
1823 | && bp.address_space == bp_tgt->placed_address_space) | |
d02ed0bb | 1824 | { |
219605fd | 1825 | if (bp.in_target_beneath) |
d02ed0bb | 1826 | { |
07036511 TT |
1827 | scoped_restore restore_operation_disable |
1828 | = record_full_gdb_operation_disable_set (); | |
f6ac5f3d | 1829 | |
b6a8c27b PA |
1830 | int ret = this->beneath ()->remove_breakpoint (gdbarch, bp_tgt, |
1831 | reason); | |
d02ed0bb MM |
1832 | if (ret != 0) |
1833 | return ret; | |
1834 | } | |
1835 | ||
01d3dedf | 1836 | if (reason == REMOVE_BREAKPOINT) |
219605fd | 1837 | unordered_remove (record_full_breakpoints, iter); |
d02ed0bb MM |
1838 | return 0; |
1839 | } | |
1840 | } | |
1841 | ||
1842 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1843 | } | |
1844 | ||
f6ac5f3d | 1845 | /* "can_execute_reverse" method for process record target. */ |
d02ed0bb | 1846 | |
57810aa7 | 1847 | bool |
f6ac5f3d | 1848 | record_full_base_target::can_execute_reverse () |
d02ed0bb | 1849 | { |
57810aa7 | 1850 | return true; |
d02ed0bb MM |
1851 | } |
1852 | ||
f6ac5f3d | 1853 | /* "get_bookmark" method for process record and prec over core. */ |
d02ed0bb | 1854 | |
f6ac5f3d PA |
1855 | gdb_byte * |
1856 | record_full_base_target::get_bookmark (const char *args, int from_tty) | |
d02ed0bb | 1857 | { |
0f928d68 | 1858 | char *ret = NULL; |
d02ed0bb MM |
1859 | |
1860 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1861 | if (record_full_list && record_full_list->type == record_full_end) |
1862 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1863 | |
1864 | if (record_debug) | |
1865 | { | |
1866 | if (ret) | |
1867 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1868 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1869 | else |
1870 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1871 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1872 | } |
0f928d68 | 1873 | return (gdb_byte *) ret; |
d02ed0bb MM |
1874 | } |
1875 | ||
f6ac5f3d | 1876 | /* "goto_bookmark" method for process record and prec over core. */ |
d02ed0bb | 1877 | |
f6ac5f3d PA |
1878 | void |
1879 | record_full_base_target::goto_bookmark (const gdb_byte *raw_bookmark, | |
1880 | int from_tty) | |
d02ed0bb | 1881 | { |
c2bcbb1d | 1882 | const char *bookmark = (const char *) raw_bookmark; |
0f928d68 | 1883 | |
d02ed0bb MM |
1884 | if (record_debug) |
1885 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1886 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb | 1887 | |
a2b2bc12 | 1888 | std::string name_holder; |
d02ed0bb MM |
1889 | if (bookmark[0] == '\'' || bookmark[0] == '\"') |
1890 | { | |
1891 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) | |
1892 | error (_("Unbalanced quotes: %s"), bookmark); | |
1893 | ||
a2b2bc12 TT |
1894 | name_holder = std::string (bookmark + 1, strlen (bookmark) - 2); |
1895 | bookmark = name_holder.c_str (); | |
d02ed0bb MM |
1896 | } |
1897 | ||
c2bcbb1d | 1898 | record_goto (bookmark); |
d02ed0bb MM |
1899 | } |
1900 | ||
f6ac5f3d PA |
1901 | enum exec_direction_kind |
1902 | record_full_base_target::execution_direction () | |
d02ed0bb | 1903 | { |
88d1aa9d | 1904 | return record_full_execution_dir; |
d02ed0bb MM |
1905 | } |
1906 | ||
f6ac5f3d | 1907 | /* The record_method method of target record-full. */ |
b158a20f TW |
1908 | |
1909 | enum record_method | |
f6ac5f3d | 1910 | record_full_base_target::record_method (ptid_t ptid) |
b158a20f TW |
1911 | { |
1912 | return RECORD_METHOD_FULL; | |
1913 | } | |
1914 | ||
f6ac5f3d PA |
1915 | void |
1916 | record_full_base_target::info_record () | |
d02ed0bb | 1917 | { |
88d1aa9d | 1918 | struct record_full_entry *p; |
d02ed0bb | 1919 | |
88d1aa9d | 1920 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1921 | printf_filtered (_("Replay mode:\n")); |
1922 | else | |
1923 | printf_filtered (_("Record mode:\n")); | |
1924 | ||
1925 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1926 | for (p = record_full_first.next; |
1927 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1928 | p = p->next) |
1929 | ; | |
1930 | ||
1931 | /* Do we have a log at all? */ | |
88d1aa9d | 1932 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1933 | { |
1934 | /* Display instruction number for first instruction in the log. */ | |
1935 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1936 | pulongest (p->u.end.insn_num)); | |
1937 | ||
1938 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1939 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1940 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1941 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1942 | |
1943 | /* Display instruction number for last instruction in the log. */ | |
1944 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1945 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1946 | |
1947 | /* Display log count. */ | |
7ee70bf5 | 1948 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1949 | record_full_insn_num); |
d02ed0bb MM |
1950 | } |
1951 | else | |
1952 | printf_filtered (_("No instructions have been logged.\n")); | |
1953 | ||
1954 | /* Display max log size. */ | |
7ee70bf5 | 1955 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1956 | record_full_insn_max_num); |
d02ed0bb MM |
1957 | } |
1958 | ||
f6ac5f3d PA |
1959 | bool |
1960 | record_full_base_target::supports_delete_record () | |
1961 | { | |
1962 | return true; | |
1963 | } | |
d02ed0bb | 1964 | |
f6ac5f3d PA |
1965 | /* The "delete_record" target method. */ |
1966 | ||
1967 | void | |
1968 | record_full_base_target::delete_record () | |
d02ed0bb | 1969 | { |
88d1aa9d | 1970 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1971 | } |
1972 | ||
f6ac5f3d | 1973 | /* The "record_is_replaying" target method. */ |
d02ed0bb | 1974 | |
57810aa7 | 1975 | bool |
f6ac5f3d | 1976 | record_full_base_target::record_is_replaying (ptid_t ptid) |
d02ed0bb | 1977 | { |
88d1aa9d | 1978 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1979 | } |
1980 | ||
f6ac5f3d | 1981 | /* The "record_will_replay" target method. */ |
7ff27e9b | 1982 | |
57810aa7 | 1983 | bool |
f6ac5f3d | 1984 | record_full_base_target::record_will_replay (ptid_t ptid, int dir) |
7ff27e9b MM |
1985 | { |
1986 | /* We can currently only record when executing forwards. Should we be able | |
1987 | to record when executing backwards on targets that support reverse | |
1988 | execution, this needs to be changed. */ | |
1989 | ||
1990 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1991 | } | |
1992 | ||
d02ed0bb MM |
1993 | /* Go to a specific entry. */ |
1994 | ||
1995 | static void | |
88d1aa9d | 1996 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1997 | { |
1998 | if (p == NULL) | |
1999 | error (_("Target insn not found.")); | |
88d1aa9d | 2000 | else if (p == record_full_list) |
d02ed0bb | 2001 | error (_("Already at target insn.")); |
88d1aa9d | 2002 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
2003 | { |
2004 | printf_filtered (_("Go forward to insn number %s\n"), | |
2005 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 2006 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
2007 | } |
2008 | else | |
2009 | { | |
2010 | printf_filtered (_("Go backward to insn number %s\n"), | |
2011 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 2012 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
2013 | } |
2014 | ||
2015 | registers_changed (); | |
2016 | reinit_frame_cache (); | |
f2ffa92b PA |
2017 | inferior_thread ()->suspend.stop_pc |
2018 | = regcache_read_pc (get_current_regcache ()); | |
08d72866 | 2019 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2020 | } |
2021 | ||
f6ac5f3d | 2022 | /* The "goto_record_begin" target method. */ |
d02ed0bb | 2023 | |
f6ac5f3d PA |
2024 | void |
2025 | record_full_base_target::goto_record_begin () | |
d02ed0bb | 2026 | { |
88d1aa9d | 2027 | struct record_full_entry *p = NULL; |
d02ed0bb | 2028 | |
88d1aa9d MM |
2029 | for (p = &record_full_first; p != NULL; p = p->next) |
2030 | if (p->type == record_full_end) | |
d02ed0bb MM |
2031 | break; |
2032 | ||
88d1aa9d | 2033 | record_full_goto_entry (p); |
d02ed0bb MM |
2034 | } |
2035 | ||
f6ac5f3d | 2036 | /* The "goto_record_end" target method. */ |
d02ed0bb | 2037 | |
f6ac5f3d PA |
2038 | void |
2039 | record_full_base_target::goto_record_end () | |
d02ed0bb | 2040 | { |
88d1aa9d | 2041 | struct record_full_entry *p = NULL; |
d02ed0bb | 2042 | |
88d1aa9d | 2043 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
2044 | ; |
2045 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 2046 | if (p->type == record_full_end) |
d02ed0bb MM |
2047 | break; |
2048 | ||
88d1aa9d | 2049 | record_full_goto_entry (p); |
d02ed0bb MM |
2050 | } |
2051 | ||
f6ac5f3d | 2052 | /* The "goto_record" target method. */ |
d02ed0bb | 2053 | |
f6ac5f3d PA |
2054 | void |
2055 | record_full_base_target::goto_record (ULONGEST target_insn) | |
d02ed0bb | 2056 | { |
88d1aa9d | 2057 | struct record_full_entry *p = NULL; |
d02ed0bb | 2058 | |
88d1aa9d MM |
2059 | for (p = &record_full_first; p != NULL; p = p->next) |
2060 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
2061 | break; |
2062 | ||
88d1aa9d | 2063 | record_full_goto_entry (p); |
d02ed0bb MM |
2064 | } |
2065 | ||
f6ac5f3d | 2066 | /* The "record_stop_replaying" target method. */ |
797094dd | 2067 | |
f6ac5f3d PA |
2068 | void |
2069 | record_full_base_target::record_stop_replaying () | |
797094dd | 2070 | { |
f6ac5f3d | 2071 | goto_record_end (); |
797094dd MM |
2072 | } |
2073 | ||
f6ac5f3d | 2074 | /* "resume" method for prec over corefile. */ |
d02ed0bb | 2075 | |
f6ac5f3d PA |
2076 | void |
2077 | record_full_core_target::resume (ptid_t ptid, int step, | |
2078 | enum gdb_signal signal) | |
d02ed0bb | 2079 | { |
88d1aa9d MM |
2080 | record_full_resume_step = step; |
2081 | record_full_resumed = 1; | |
f6ac5f3d | 2082 | record_full_execution_dir = ::execution_direction; |
d02ed0bb MM |
2083 | |
2084 | /* We are about to start executing the inferior (or simulate it), | |
2085 | let's register it with the event loop. */ | |
2086 | if (target_can_async_p ()) | |
6a3753b3 | 2087 | target_async (1); |
d02ed0bb MM |
2088 | } |
2089 | ||
f6ac5f3d | 2090 | /* "kill" method for prec over corefile. */ |
d02ed0bb | 2091 | |
f6ac5f3d PA |
2092 | void |
2093 | record_full_core_target::kill () | |
d02ed0bb MM |
2094 | { |
2095 | if (record_debug) | |
88d1aa9d | 2096 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2097 | |
f6ac5f3d | 2098 | unpush_target (this); |
d02ed0bb MM |
2099 | } |
2100 | ||
f6ac5f3d | 2101 | /* "fetch_registers" method for prec over corefile. */ |
d02ed0bb | 2102 | |
f6ac5f3d PA |
2103 | void |
2104 | record_full_core_target::fetch_registers (struct regcache *regcache, | |
2105 | int regno) | |
d02ed0bb MM |
2106 | { |
2107 | if (regno < 0) | |
2108 | { | |
ac7936df | 2109 | int num = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
2110 | int i; |
2111 | ||
2112 | for (i = 0; i < num; i ++) | |
c8ec2f33 | 2113 | regcache->raw_supply (i, *record_full_core_regbuf); |
d02ed0bb MM |
2114 | } |
2115 | else | |
c8ec2f33 | 2116 | regcache->raw_supply (regno, *record_full_core_regbuf); |
d02ed0bb MM |
2117 | } |
2118 | ||
f6ac5f3d | 2119 | /* "prepare_to_store" method for prec over corefile. */ |
d02ed0bb | 2120 | |
f6ac5f3d PA |
2121 | void |
2122 | record_full_core_target::prepare_to_store (struct regcache *regcache) | |
d02ed0bb MM |
2123 | { |
2124 | } | |
2125 | ||
f6ac5f3d | 2126 | /* "store_registers" method for prec over corefile. */ |
d02ed0bb | 2127 | |
f6ac5f3d PA |
2128 | void |
2129 | record_full_core_target::store_registers (struct regcache *regcache, | |
2130 | int regno) | |
d02ed0bb | 2131 | { |
88d1aa9d | 2132 | if (record_full_gdb_operation_disable) |
c8ec2f33 | 2133 | record_full_core_regbuf->raw_supply (regno, *regcache); |
d02ed0bb MM |
2134 | else |
2135 | error (_("You can't do that without a process to debug.")); | |
2136 | } | |
2137 | ||
f6ac5f3d | 2138 | /* "xfer_partial" method for prec over corefile. */ |
d02ed0bb | 2139 | |
f6ac5f3d PA |
2140 | enum target_xfer_status |
2141 | record_full_core_target::xfer_partial (enum target_object object, | |
2142 | const char *annex, gdb_byte *readbuf, | |
2143 | const gdb_byte *writebuf, ULONGEST offset, | |
2144 | ULONGEST len, ULONGEST *xfered_len) | |
d02ed0bb MM |
2145 | { |
2146 | if (object == TARGET_OBJECT_MEMORY) | |
2147 | { | |
88d1aa9d | 2148 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb MM |
2149 | { |
2150 | struct target_section *p; | |
2151 | ||
88d1aa9d | 2152 | for (p = record_full_core_start; p < record_full_core_end; p++) |
d02ed0bb MM |
2153 | { |
2154 | if (offset >= p->addr) | |
2155 | { | |
88d1aa9d | 2156 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2157 | ULONGEST sec_offset; |
2158 | ||
2159 | if (offset >= p->endaddr) | |
2160 | continue; | |
2161 | ||
2162 | if (offset + len > p->endaddr) | |
2163 | len = p->endaddr - offset; | |
2164 | ||
2165 | sec_offset = offset - p->addr; | |
2166 | ||
2167 | /* Read readbuf or write writebuf p, offset, len. */ | |
2168 | /* Check flags. */ | |
2169 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2170 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2171 | { | |
2172 | if (readbuf) | |
2173 | memset (readbuf, 0, len); | |
9b409511 YQ |
2174 | |
2175 | *xfered_len = len; | |
2176 | return TARGET_XFER_OK; | |
d02ed0bb | 2177 | } |
88d1aa9d MM |
2178 | /* Get record_full_core_buf_entry. */ |
2179 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb MM |
2180 | entry = entry->prev) |
2181 | if (entry->p == p) | |
2182 | break; | |
2183 | if (writebuf) | |
2184 | { | |
2185 | if (!entry) | |
2186 | { | |
2187 | /* Add a new entry. */ | |
8d749320 | 2188 | entry = XNEW (struct record_full_core_buf_entry); |
d02ed0bb | 2189 | entry->p = p; |
2b2848e2 DE |
2190 | if (!bfd_malloc_and_get_section |
2191 | (p->the_bfd_section->owner, | |
2192 | p->the_bfd_section, | |
2193 | &entry->buf)) | |
d02ed0bb MM |
2194 | { |
2195 | xfree (entry); | |
9b409511 | 2196 | return TARGET_XFER_EOF; |
d02ed0bb | 2197 | } |
88d1aa9d MM |
2198 | entry->prev = record_full_core_buf_list; |
2199 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2200 | } |
2201 | ||
2202 | memcpy (entry->buf + sec_offset, writebuf, | |
2203 | (size_t) len); | |
2204 | } | |
2205 | else | |
2206 | { | |
2207 | if (!entry) | |
b6a8c27b PA |
2208 | return this->beneath ()->xfer_partial (object, annex, |
2209 | readbuf, writebuf, | |
2210 | offset, len, | |
2211 | xfered_len); | |
d02ed0bb MM |
2212 | |
2213 | memcpy (readbuf, entry->buf + sec_offset, | |
2214 | (size_t) len); | |
2215 | } | |
2216 | ||
9b409511 YQ |
2217 | *xfered_len = len; |
2218 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2219 | } |
2220 | } | |
2221 | ||
2ed4b548 | 2222 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2223 | } |
2224 | else | |
2225 | error (_("You can't do that without a process to debug.")); | |
2226 | } | |
2227 | ||
b6a8c27b PA |
2228 | return this->beneath ()->xfer_partial (object, annex, |
2229 | readbuf, writebuf, offset, len, | |
2230 | xfered_len); | |
d02ed0bb MM |
2231 | } |
2232 | ||
f6ac5f3d | 2233 | /* "insert_breakpoint" method for prec over corefile. */ |
d02ed0bb | 2234 | |
f6ac5f3d PA |
2235 | int |
2236 | record_full_core_target::insert_breakpoint (struct gdbarch *gdbarch, | |
2237 | struct bp_target_info *bp_tgt) | |
d02ed0bb MM |
2238 | { |
2239 | return 0; | |
2240 | } | |
2241 | ||
f6ac5f3d | 2242 | /* "remove_breakpoint" method for prec over corefile. */ |
d02ed0bb | 2243 | |
f6ac5f3d PA |
2244 | int |
2245 | record_full_core_target::remove_breakpoint (struct gdbarch *gdbarch, | |
2246 | struct bp_target_info *bp_tgt, | |
2247 | enum remove_bp_reason reason) | |
d02ed0bb MM |
2248 | { |
2249 | return 0; | |
2250 | } | |
2251 | ||
f6ac5f3d | 2252 | /* "has_execution" method for prec over corefile. */ |
d02ed0bb | 2253 | |
57810aa7 | 2254 | bool |
5018ce90 | 2255 | record_full_core_target::has_execution (inferior *inf) |
d02ed0bb | 2256 | { |
57810aa7 | 2257 | return true; |
d02ed0bb MM |
2258 | } |
2259 | ||
d02ed0bb MM |
2260 | /* Record log save-file format |
2261 | Version 1 (never released) | |
2262 | ||
2263 | Header: | |
2264 | 4 bytes: magic number htonl(0x20090829). | |
2265 | NOTE: be sure to change whenever this file format changes! | |
2266 | ||
2267 | Records: | |
88d1aa9d MM |
2268 | record_full_end: |
2269 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2270 | record_full_reg: | |
2271 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2272 | 8 bytes: register id (network byte order). |
2273 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2274 | record_full_mem: |
2275 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2276 | 8 bytes: memory length (network byte order). |
2277 | 8 bytes: memory address (network byte order). | |
2278 | n bytes: memory value (n == memory length). | |
2279 | ||
2280 | Version 2 | |
2281 | 4 bytes: magic number netorder32(0x20091016). | |
2282 | NOTE: be sure to change whenever this file format changes! | |
2283 | ||
2284 | Records: | |
88d1aa9d MM |
2285 | record_full_end: |
2286 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2287 | 4 bytes: signal |
2288 | 4 bytes: instruction count | |
88d1aa9d MM |
2289 | record_full_reg: |
2290 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2291 | 4 bytes: register id (network byte order). |
2292 | n bytes: register value (n == actual register size). | |
2293 | (eg. 4 bytes for x86 general registers). | |
88d1aa9d MM |
2294 | record_full_mem: |
2295 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2296 | 4 bytes: memory length (network byte order). |
2297 | 8 bytes: memory address (network byte order). | |
2298 | n bytes: memory value (n == memory length). | |
2299 | ||
2300 | */ | |
2301 | ||
2302 | /* bfdcore_read -- read bytes from a core file section. */ | |
2303 | ||
2304 | static inline void | |
2305 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2306 | { | |
2307 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2308 | ||
2309 | if (ret) | |
2310 | *offset += len; | |
2311 | else | |
2312 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2313 | len, bfd_get_filename (obfd), | |
2314 | bfd_errmsg (bfd_get_error ())); | |
2315 | } | |
2316 | ||
2317 | static inline uint64_t | |
2318 | netorder64 (uint64_t input) | |
2319 | { | |
2320 | uint64_t ret; | |
2321 | ||
2322 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2323 | BFD_ENDIAN_BIG, input); | |
2324 | return ret; | |
2325 | } | |
2326 | ||
2327 | static inline uint32_t | |
2328 | netorder32 (uint32_t input) | |
2329 | { | |
2330 | uint32_t ret; | |
2331 | ||
d02ed0bb MM |
2332 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), |
2333 | BFD_ENDIAN_BIG, input); | |
2334 | return ret; | |
2335 | } | |
2336 | ||
2337 | /* Restore the execution log from a core_bfd file. */ | |
2338 | static void | |
88d1aa9d | 2339 | record_full_restore (void) |
d02ed0bb MM |
2340 | { |
2341 | uint32_t magic; | |
88d1aa9d | 2342 | struct record_full_entry *rec; |
d02ed0bb MM |
2343 | asection *osec; |
2344 | uint32_t osec_size; | |
2345 | int bfd_offset = 0; | |
2346 | struct regcache *regcache; | |
2347 | ||
2348 | /* We restore the execution log from the open core bfd, | |
2349 | if there is one. */ | |
2350 | if (core_bfd == NULL) | |
2351 | return; | |
2352 | ||
88d1aa9d MM |
2353 | /* "record_full_restore" can only be called when record list is empty. */ |
2354 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2355 | |
2356 | if (record_debug) | |
2357 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2358 | ||
2359 | /* Now need to find our special note section. */ | |
2360 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2361 | if (record_debug) | |
2362 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2363 | osec ? "succeeded" : "failed"); | |
2364 | if (osec == NULL) | |
2365 | return; | |
fd361982 | 2366 | osec_size = bfd_section_size (osec); |
d02ed0bb | 2367 | if (record_debug) |
fd361982 | 2368 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (osec)); |
d02ed0bb MM |
2369 | |
2370 | /* Check the magic code. */ | |
2371 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2372 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2373 | error (_("Version mis-match or file format error in core file %s."), |
2374 | bfd_get_filename (core_bfd)); | |
2375 | if (record_debug) | |
2376 | fprintf_unfiltered (gdb_stdlog, | |
2377 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2378 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2379 | phex_nz (netorder32 (magic), 4)); |
2380 | ||
88d1aa9d MM |
2381 | /* Restore the entries in recfd into record_full_arch_list_head and |
2382 | record_full_arch_list_tail. */ | |
2383 | record_full_arch_list_head = NULL; | |
2384 | record_full_arch_list_tail = NULL; | |
2385 | record_full_insn_num = 0; | |
d02ed0bb | 2386 | |
a70b8144 | 2387 | try |
d02ed0bb | 2388 | { |
1ddbba9d TT |
2389 | regcache = get_current_regcache (); |
2390 | ||
2391 | while (1) | |
2392 | { | |
2393 | uint8_t rectype; | |
2394 | uint32_t regnum, len, signal, count; | |
2395 | uint64_t addr; | |
d02ed0bb | 2396 | |
1ddbba9d TT |
2397 | /* We are finished when offset reaches osec_size. */ |
2398 | if (bfd_offset >= osec_size) | |
2399 | break; | |
2400 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
d02ed0bb | 2401 | |
1ddbba9d TT |
2402 | switch (rectype) |
2403 | { | |
2404 | case record_full_reg: /* reg */ | |
2405 | /* Get register number to regnum. */ | |
2406 | bfdcore_read (core_bfd, osec, ®num, | |
2407 | sizeof (regnum), &bfd_offset); | |
2408 | regnum = netorder32 (regnum); | |
d02ed0bb | 2409 | |
1ddbba9d | 2410 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 2411 | |
1ddbba9d TT |
2412 | /* Get val. */ |
2413 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), | |
2414 | rec->u.reg.len, &bfd_offset); | |
d02ed0bb | 2415 | |
1ddbba9d TT |
2416 | if (record_debug) |
2417 | fprintf_unfiltered (gdb_stdlog, | |
2418 | " Reading register %d (1 " | |
2419 | "plus %lu plus %d bytes)\n", | |
2420 | rec->u.reg.num, | |
2421 | (unsigned long) sizeof (regnum), | |
2422 | rec->u.reg.len); | |
2423 | break; | |
d02ed0bb | 2424 | |
1ddbba9d TT |
2425 | case record_full_mem: /* mem */ |
2426 | /* Get len. */ | |
2427 | bfdcore_read (core_bfd, osec, &len, | |
2428 | sizeof (len), &bfd_offset); | |
2429 | len = netorder32 (len); | |
d02ed0bb | 2430 | |
1ddbba9d TT |
2431 | /* Get addr. */ |
2432 | bfdcore_read (core_bfd, osec, &addr, | |
2433 | sizeof (addr), &bfd_offset); | |
2434 | addr = netorder64 (addr); | |
2435 | ||
2436 | rec = record_full_mem_alloc (addr, len); | |
2437 | ||
2438 | /* Get val. */ | |
2439 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), | |
2440 | rec->u.mem.len, &bfd_offset); | |
2441 | ||
2442 | if (record_debug) | |
2443 | fprintf_unfiltered (gdb_stdlog, | |
2444 | " Reading memory %s (1 plus " | |
2445 | "%lu plus %lu plus %d bytes)\n", | |
2446 | paddress (get_current_arch (), | |
2447 | rec->u.mem.addr), | |
2448 | (unsigned long) sizeof (addr), | |
2449 | (unsigned long) sizeof (len), | |
2450 | rec->u.mem.len); | |
2451 | break; | |
2452 | ||
2453 | case record_full_end: /* end */ | |
2454 | rec = record_full_end_alloc (); | |
2455 | record_full_insn_num ++; | |
2456 | ||
2457 | /* Get signal value. */ | |
2458 | bfdcore_read (core_bfd, osec, &signal, | |
2459 | sizeof (signal), &bfd_offset); | |
2460 | signal = netorder32 (signal); | |
2461 | rec->u.end.sigval = (enum gdb_signal) signal; | |
2462 | ||
2463 | /* Get insn count. */ | |
2464 | bfdcore_read (core_bfd, osec, &count, | |
2465 | sizeof (count), &bfd_offset); | |
2466 | count = netorder32 (count); | |
2467 | rec->u.end.insn_num = count; | |
2468 | record_full_insn_count = count + 1; | |
2469 | if (record_debug) | |
2470 | fprintf_unfiltered (gdb_stdlog, | |
2471 | " Reading record_full_end (1 + " | |
2472 | "%lu + %lu bytes), offset == %s\n", | |
2473 | (unsigned long) sizeof (signal), | |
2474 | (unsigned long) sizeof (count), | |
2475 | paddress (get_current_arch (), | |
2476 | bfd_offset)); | |
2477 | break; | |
2478 | ||
2479 | default: | |
2480 | error (_("Bad entry type in core file %s."), | |
2481 | bfd_get_filename (core_bfd)); | |
2482 | break; | |
2483 | } | |
d02ed0bb | 2484 | |
1ddbba9d TT |
2485 | /* Add rec to record arch list. */ |
2486 | record_full_arch_list_add (rec); | |
2487 | } | |
2488 | } | |
230d2906 | 2489 | catch (const gdb_exception &ex) |
1ddbba9d TT |
2490 | { |
2491 | record_full_list_release (record_full_arch_list_tail); | |
eedc3f4f | 2492 | throw; |
1ddbba9d | 2493 | } |
d02ed0bb | 2494 | |
88d1aa9d MM |
2495 | /* Add record_full_arch_list_head to the end of record list. */ |
2496 | record_full_first.next = record_full_arch_list_head; | |
2497 | record_full_arch_list_head->prev = &record_full_first; | |
2498 | record_full_arch_list_tail->next = NULL; | |
2499 | record_full_list = &record_full_first; | |
d02ed0bb | 2500 | |
88d1aa9d MM |
2501 | /* Update record_full_insn_max_num. */ |
2502 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2503 | { |
88d1aa9d | 2504 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2505 | warning (_("Auto increase record/replay buffer limit to %u."), |
88d1aa9d | 2506 | record_full_insn_max_num); |
d02ed0bb MM |
2507 | } |
2508 | ||
2509 | /* Succeeded. */ | |
2510 | printf_filtered (_("Restored records from core file %s.\n"), | |
2511 | bfd_get_filename (core_bfd)); | |
2512 | ||
08d72866 | 2513 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2514 | } |
2515 | ||
2516 | /* bfdcore_write -- write bytes into a core file section. */ | |
2517 | ||
2518 | static inline void | |
2519 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2520 | { | |
2521 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2522 | ||
2523 | if (ret) | |
2524 | *offset += len; | |
2525 | else | |
2526 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2527 | len, bfd_get_filename (obfd), | |
2528 | bfd_errmsg (bfd_get_error ())); | |
2529 | } | |
2530 | ||
2531 | /* Restore the execution log from a file. We use a modified elf | |
2532 | corefile format, with an extra section for our data. */ | |
2533 | ||
2534 | static void | |
41243651 | 2535 | cmd_record_full_restore (const char *args, int from_tty) |
d02ed0bb MM |
2536 | { |
2537 | core_file_command (args, from_tty); | |
d9f719f1 | 2538 | record_full_open (args, from_tty); |
d02ed0bb MM |
2539 | } |
2540 | ||
d02ed0bb MM |
2541 | /* Save the execution log to a file. We use a modified elf corefile |
2542 | format, with an extra section for our data. */ | |
2543 | ||
f6ac5f3d PA |
2544 | void |
2545 | record_full_base_target::save_record (const char *recfilename) | |
d02ed0bb | 2546 | { |
88d1aa9d | 2547 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2548 | uint32_t magic; |
2549 | struct regcache *regcache; | |
2550 | struct gdbarch *gdbarch; | |
d02ed0bb MM |
2551 | int save_size = 0; |
2552 | asection *osec = NULL; | |
2553 | int bfd_offset = 0; | |
2554 | ||
2555 | /* Open the save file. */ | |
2556 | if (record_debug) | |
2557 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2558 | recfilename); | |
2559 | ||
2560 | /* Open the output file. */ | |
bef155c3 TT |
2561 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (recfilename)); |
2562 | ||
2563 | /* Arrange to remove the output file on failure. */ | |
2564 | gdb::unlinker unlink_file (recfilename); | |
d02ed0bb | 2565 | |
88d1aa9d MM |
2566 | /* Save the current record entry to "cur_record_full_list". */ |
2567 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2568 | |
2569 | /* Get the values of regcache and gdbarch. */ | |
2570 | regcache = get_current_regcache (); | |
ac7936df | 2571 | gdbarch = regcache->arch (); |
d02ed0bb MM |
2572 | |
2573 | /* Disable the GDB operation record. */ | |
07036511 TT |
2574 | scoped_restore restore_operation_disable |
2575 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
2576 | |
2577 | /* Reverse execute to the begin of record list. */ | |
2578 | while (1) | |
2579 | { | |
2580 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2581 | if (record_full_list == &record_full_first) |
d02ed0bb MM |
2582 | break; |
2583 | ||
88d1aa9d | 2584 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2585 | |
88d1aa9d MM |
2586 | if (record_full_list->prev) |
2587 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2588 | } |
2589 | ||
2590 | /* Compute the size needed for the extra bfd section. */ | |
2591 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2592 | for (record_full_list = record_full_first.next; record_full_list; |
2593 | record_full_list = record_full_list->next) | |
2594 | switch (record_full_list->type) | |
d02ed0bb | 2595 | { |
88d1aa9d | 2596 | case record_full_end: |
d02ed0bb MM |
2597 | save_size += 1 + 4 + 4; |
2598 | break; | |
88d1aa9d MM |
2599 | case record_full_reg: |
2600 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2601 | break; |
88d1aa9d MM |
2602 | case record_full_mem: |
2603 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2604 | break; |
2605 | } | |
2606 | ||
2607 | /* Make the new bfd section. */ | |
bef155c3 | 2608 | osec = bfd_make_section_anyway_with_flags (obfd.get (), "precord", |
d02ed0bb MM |
2609 | SEC_HAS_CONTENTS |
2610 | | SEC_READONLY); | |
2611 | if (osec == NULL) | |
2612 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2613 | recfilename, | |
2614 | bfd_errmsg (bfd_get_error ())); | |
fd361982 AM |
2615 | bfd_set_section_size (osec, save_size); |
2616 | bfd_set_section_vma (osec, 0); | |
2617 | bfd_set_section_alignment (osec, 0); | |
d02ed0bb MM |
2618 | |
2619 | /* Save corefile state. */ | |
bef155c3 | 2620 | write_gcore_file (obfd.get ()); |
d02ed0bb MM |
2621 | |
2622 | /* Write out the record log. */ | |
2623 | /* Write the magic code. */ | |
88d1aa9d | 2624 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2625 | if (record_debug) |
2626 | fprintf_unfiltered (gdb_stdlog, | |
2627 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2628 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb | 2629 | phex_nz (magic, 4)); |
bef155c3 | 2630 | bfdcore_write (obfd.get (), osec, &magic, sizeof (magic), &bfd_offset); |
d02ed0bb MM |
2631 | |
2632 | /* Save the entries to recfd and forward execute to the end of | |
2633 | record list. */ | |
88d1aa9d | 2634 | record_full_list = &record_full_first; |
d02ed0bb MM |
2635 | while (1) |
2636 | { | |
2637 | /* Save entry. */ | |
88d1aa9d | 2638 | if (record_full_list != &record_full_first) |
d02ed0bb MM |
2639 | { |
2640 | uint8_t type; | |
2641 | uint32_t regnum, len, signal, count; | |
2642 | uint64_t addr; | |
2643 | ||
88d1aa9d | 2644 | type = record_full_list->type; |
bef155c3 | 2645 | bfdcore_write (obfd.get (), osec, &type, sizeof (type), &bfd_offset); |
d02ed0bb | 2646 | |
88d1aa9d | 2647 | switch (record_full_list->type) |
d02ed0bb | 2648 | { |
88d1aa9d | 2649 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2650 | if (record_debug) |
2651 | fprintf_unfiltered (gdb_stdlog, | |
2652 | " Writing register %d (1 " | |
2653 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2654 | record_full_list->u.reg.num, |
d02ed0bb | 2655 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2656 | record_full_list->u.reg.len); |
d02ed0bb MM |
2657 | |
2658 | /* Write regnum. */ | |
88d1aa9d | 2659 | regnum = netorder32 (record_full_list->u.reg.num); |
bef155c3 | 2660 | bfdcore_write (obfd.get (), osec, ®num, |
d02ed0bb MM |
2661 | sizeof (regnum), &bfd_offset); |
2662 | ||
2663 | /* Write regval. */ | |
bef155c3 | 2664 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2665 | record_full_get_loc (record_full_list), |
2666 | record_full_list->u.reg.len, &bfd_offset); | |
d02ed0bb MM |
2667 | break; |
2668 | ||
88d1aa9d | 2669 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2670 | if (record_debug) |
2671 | fprintf_unfiltered (gdb_stdlog, | |
2672 | " Writing memory %s (1 plus " | |
2673 | "%lu plus %lu plus %d bytes)\n", | |
2674 | paddress (gdbarch, | |
88d1aa9d | 2675 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2676 | (unsigned long) sizeof (addr), |
2677 | (unsigned long) sizeof (len), | |
88d1aa9d | 2678 | record_full_list->u.mem.len); |
d02ed0bb MM |
2679 | |
2680 | /* Write memlen. */ | |
88d1aa9d | 2681 | len = netorder32 (record_full_list->u.mem.len); |
bef155c3 TT |
2682 | bfdcore_write (obfd.get (), osec, &len, sizeof (len), |
2683 | &bfd_offset); | |
d02ed0bb MM |
2684 | |
2685 | /* Write memaddr. */ | |
88d1aa9d | 2686 | addr = netorder64 (record_full_list->u.mem.addr); |
bef155c3 | 2687 | bfdcore_write (obfd.get (), osec, &addr, |
d02ed0bb MM |
2688 | sizeof (addr), &bfd_offset); |
2689 | ||
2690 | /* Write memval. */ | |
bef155c3 | 2691 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2692 | record_full_get_loc (record_full_list), |
2693 | record_full_list->u.mem.len, &bfd_offset); | |
d02ed0bb MM |
2694 | break; |
2695 | ||
88d1aa9d | 2696 | case record_full_end: |
d02ed0bb MM |
2697 | if (record_debug) |
2698 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2699 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2700 | "%lu + %lu bytes)\n", |
2701 | (unsigned long) sizeof (signal), | |
2702 | (unsigned long) sizeof (count)); | |
2703 | /* Write signal value. */ | |
88d1aa9d | 2704 | signal = netorder32 (record_full_list->u.end.sigval); |
bef155c3 | 2705 | bfdcore_write (obfd.get (), osec, &signal, |
d02ed0bb MM |
2706 | sizeof (signal), &bfd_offset); |
2707 | ||
2708 | /* Write insn count. */ | |
88d1aa9d | 2709 | count = netorder32 (record_full_list->u.end.insn_num); |
bef155c3 | 2710 | bfdcore_write (obfd.get (), osec, &count, |
d02ed0bb MM |
2711 | sizeof (count), &bfd_offset); |
2712 | break; | |
2713 | } | |
2714 | } | |
2715 | ||
2716 | /* Execute entry. */ | |
88d1aa9d | 2717 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2718 | |
88d1aa9d MM |
2719 | if (record_full_list->next) |
2720 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
2721 | else |
2722 | break; | |
2723 | } | |
2724 | ||
88d1aa9d | 2725 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2726 | while (1) |
2727 | { | |
2728 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2729 | if (record_full_list == cur_record_full_list) |
d02ed0bb MM |
2730 | break; |
2731 | ||
88d1aa9d | 2732 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2733 | |
88d1aa9d MM |
2734 | if (record_full_list->prev) |
2735 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2736 | } |
2737 | ||
bef155c3 | 2738 | unlink_file.keep (); |
d02ed0bb MM |
2739 | |
2740 | /* Succeeded. */ | |
2741 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2742 | recfilename); | |
2743 | } | |
2744 | ||
88d1aa9d | 2745 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2746 | depending on DIR) to the given entry, changing the program state |
2747 | correspondingly. */ | |
2748 | ||
2749 | static void | |
88d1aa9d MM |
2750 | record_full_goto_insn (struct record_full_entry *entry, |
2751 | enum exec_direction_kind dir) | |
d02ed0bb | 2752 | { |
07036511 TT |
2753 | scoped_restore restore_operation_disable |
2754 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 2755 | struct regcache *regcache = get_current_regcache (); |
ac7936df | 2756 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb MM |
2757 | |
2758 | /* Assume everything is valid: we will hit the entry, | |
2759 | and we will not hit the end of the recording. */ | |
2760 | ||
2761 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2762 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2763 | |
2764 | do | |
2765 | { | |
88d1aa9d | 2766 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2767 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2768 | record_full_list = record_full_list->prev; |
d02ed0bb | 2769 | else |
88d1aa9d MM |
2770 | record_full_list = record_full_list->next; |
2771 | } while (record_full_list != entry); | |
d02ed0bb MM |
2772 | } |
2773 | ||
2774 | /* Alias for "target record-full". */ | |
2775 | ||
2776 | static void | |
981a3fb3 | 2777 | cmd_record_full_start (const char *args, int from_tty) |
d02ed0bb | 2778 | { |
95a6b0a1 | 2779 | execute_command ("target record-full", from_tty); |
d02ed0bb MM |
2780 | } |
2781 | ||
2782 | static void | |
eb4c3f4a | 2783 | set_record_full_insn_max_num (const char *args, int from_tty, |
88d1aa9d | 2784 | struct cmd_list_element *c) |
d02ed0bb | 2785 | { |
7ee70bf5 | 2786 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2787 | { |
88d1aa9d MM |
2788 | /* Count down record_full_insn_num while releasing records from list. */ |
2789 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2790 | { |
88d1aa9d MM |
2791 | record_full_list_release_first (); |
2792 | record_full_insn_num--; | |
d02ed0bb MM |
2793 | } |
2794 | } | |
2795 | } | |
2796 | ||
6c265988 | 2797 | void _initialize_record_full (); |
d02ed0bb | 2798 | void |
6c265988 | 2799 | _initialize_record_full () |
d02ed0bb MM |
2800 | { |
2801 | struct cmd_list_element *c; | |
2802 | ||
88d1aa9d MM |
2803 | /* Init record_full_first. */ |
2804 | record_full_first.prev = NULL; | |
2805 | record_full_first.next = NULL; | |
2806 | record_full_first.type = record_full_end; | |
d02ed0bb | 2807 | |
d9f719f1 PA |
2808 | add_target (record_full_target_info, record_full_open); |
2809 | add_deprecated_target_alias (record_full_target_info, "record"); | |
2810 | add_target (record_full_core_target_info, record_full_open); | |
d02ed0bb | 2811 | |
88d1aa9d | 2812 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb MM |
2813 | _("Start full execution recording."), &record_full_cmdlist, |
2814 | "record full ", 0, &record_cmdlist); | |
2815 | ||
88d1aa9d | 2816 | c = add_cmd ("restore", class_obscure, cmd_record_full_restore, |
d02ed0bb MM |
2817 | _("Restore the execution log from a file.\n\ |
2818 | Argument is filename. File must be created with 'record save'."), | |
2819 | &record_full_cmdlist); | |
2820 | set_cmd_completer (c, filename_completer); | |
2821 | ||
2822 | /* Deprecate the old version without "full" prefix. */ | |
2823 | c = add_alias_cmd ("restore", "full restore", class_obscure, 1, | |
2824 | &record_cmdlist); | |
2825 | set_cmd_completer (c, filename_completer); | |
2826 | deprecate_cmd (c, "record full restore"); | |
2827 | ||
0743fc83 TT |
2828 | add_basic_prefix_cmd ("full", class_support, |
2829 | _("Set record options."), &set_record_full_cmdlist, | |
2830 | "set record full ", 0, &set_record_cmdlist); | |
d02ed0bb | 2831 | |
0743fc83 TT |
2832 | add_show_prefix_cmd ("full", class_support, |
2833 | _("Show record options."), &show_record_full_cmdlist, | |
2834 | "show record full ", 0, &show_record_cmdlist); | |
d02ed0bb MM |
2835 | |
2836 | /* Record instructions number limit command. */ | |
2837 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
88d1aa9d | 2838 | &record_full_stop_at_limit, _("\ |
d02ed0bb MM |
2839 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2840 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2841 | _("Default is ON.\n\ | |
2842 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2843 | When OFF, if the record/replay buffer becomes full,\n\ | |
2844 | delete the oldest recorded instruction to make room for each new one."), | |
2845 | NULL, NULL, | |
2846 | &set_record_full_cmdlist, &show_record_full_cmdlist); | |
2847 | ||
2848 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2849 | &set_record_cmdlist); | |
2850 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2851 | ||
2852 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2853 | &show_record_cmdlist); | |
2854 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2855 | ||
88d1aa9d MM |
2856 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
2857 | &record_full_insn_max_num, | |
d02ed0bb MM |
2858 | _("Set record/replay buffer limit."), |
2859 | _("Show record/replay buffer limit."), _("\ | |
2860 | Set the maximum number of instructions to be stored in the\n\ | |
f81d1120 PA |
2861 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2862 | limit. Default is 200000."), | |
88d1aa9d | 2863 | set_record_full_insn_max_num, |
d02ed0bb MM |
2864 | NULL, &set_record_full_cmdlist, |
2865 | &show_record_full_cmdlist); | |
2866 | ||
2867 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2868 | &set_record_cmdlist); | |
2869 | deprecate_cmd (c, "set record full insn-number-max"); | |
2870 | ||
2871 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2872 | &show_record_cmdlist); | |
2873 | deprecate_cmd (c, "show record full insn-number-max"); | |
2874 | ||
88d1aa9d | 2875 | add_setshow_boolean_cmd ("memory-query", no_class, |
25ea693b | 2876 | &record_full_memory_query, _("\ |
d02ed0bb MM |
2877 | Set whether query if PREC cannot record memory change of next instruction."), |
2878 | _("\ | |
2879 | Show whether query if PREC cannot record memory change of next instruction."), | |
2880 | _("\ | |
2881 | Default is OFF.\n\ | |
2882 | When ON, query if PREC cannot record memory change of next instruction."), | |
2883 | NULL, NULL, | |
88d1aa9d MM |
2884 | &set_record_full_cmdlist, |
2885 | &show_record_full_cmdlist); | |
d02ed0bb MM |
2886 | |
2887 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2888 | &set_record_cmdlist); | |
2889 | deprecate_cmd (c, "set record full memory-query"); | |
2890 | ||
2891 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2892 | &show_record_cmdlist); | |
2893 | deprecate_cmd (c, "show record full memory-query"); | |
2894 | } |