]>
Commit | Line | Data |
---|---|---|
d02ed0bb MM |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
3666a048 | 3 | Copyright (C) 2013-2021 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; |
bb2a6777 | 174 | static target_section_table record_full_core_sections; |
88d1aa9d | 175 | static struct record_full_core_buf_entry *record_full_core_buf_list = NULL; |
d02ed0bb MM |
176 | |
177 | /* The following variables are used for managing the linked list that | |
178 | represents the execution log. | |
179 | ||
88d1aa9d MM |
180 | record_full_first is the anchor that holds down the beginning of |
181 | the list. | |
d02ed0bb | 182 | |
88d1aa9d | 183 | record_full_list serves two functions: |
d02ed0bb MM |
184 | 1) In record mode, it anchors the end of the list. |
185 | 2) In replay mode, it traverses the list and points to | |
dda83cd7 | 186 | the next instruction that must be emulated. |
d02ed0bb | 187 | |
88d1aa9d MM |
188 | record_full_arch_list_head and record_full_arch_list_tail are used |
189 | to manage a separate list, which is used to build up the change | |
190 | elements of the currently executing instruction during record mode. | |
191 | When this instruction has been completely annotated in the "arch | |
192 | list", it will be appended to the main execution log. */ | |
d02ed0bb | 193 | |
88d1aa9d MM |
194 | static struct record_full_entry record_full_first; |
195 | static struct record_full_entry *record_full_list = &record_full_first; | |
196 | static struct record_full_entry *record_full_arch_list_head = NULL; | |
197 | static struct record_full_entry *record_full_arch_list_tail = NULL; | |
d02ed0bb | 198 | |
491144b5 CB |
199 | /* true ask user. false auto delete the last struct record_full_entry. */ |
200 | static bool record_full_stop_at_limit = true; | |
d02ed0bb | 201 | /* Maximum allowed number of insns in execution log. */ |
88d1aa9d MM |
202 | static unsigned int record_full_insn_max_num |
203 | = DEFAULT_RECORD_FULL_INSN_MAX_NUM; | |
d02ed0bb | 204 | /* Actual count of insns presently in execution log. */ |
7ee70bf5 | 205 | static unsigned int record_full_insn_num = 0; |
d02ed0bb MM |
206 | /* Count of insns logged so far (may be larger |
207 | than count of insns presently in execution log). */ | |
88d1aa9d | 208 | static ULONGEST record_full_insn_count; |
d02ed0bb | 209 | |
d9f719f1 PA |
210 | static const char record_longname[] |
211 | = N_("Process record and replay target"); | |
212 | static const char record_doc[] | |
213 | = N_("Log program while executing and replay execution from log."); | |
214 | ||
f6ac5f3d PA |
215 | /* Base class implementing functionality common to both the |
216 | "record-full" and "record-core" targets. */ | |
217 | ||
218 | class record_full_base_target : public target_ops | |
219 | { | |
220 | public: | |
d9f719f1 | 221 | const target_info &info () const override = 0; |
f6ac5f3d | 222 | |
66b4deae PA |
223 | strata stratum () const override { return record_stratum; } |
224 | ||
f6ac5f3d PA |
225 | void close () override; |
226 | void async (int) override; | |
b60cea74 | 227 | ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override; |
57810aa7 PA |
228 | bool stopped_by_watchpoint () override; |
229 | bool stopped_data_address (CORE_ADDR *) override; | |
f6ac5f3d | 230 | |
57810aa7 PA |
231 | bool stopped_by_sw_breakpoint () override; |
232 | bool supports_stopped_by_sw_breakpoint () override; | |
f6ac5f3d | 233 | |
57810aa7 PA |
234 | bool stopped_by_hw_breakpoint () override; |
235 | bool supports_stopped_by_hw_breakpoint () override; | |
f6ac5f3d | 236 | |
57810aa7 | 237 | bool can_execute_reverse () override; |
f6ac5f3d PA |
238 | |
239 | /* Add bookmark target methods. */ | |
240 | gdb_byte *get_bookmark (const char *, int) override; | |
241 | void goto_bookmark (const gdb_byte *, int) override; | |
242 | enum exec_direction_kind execution_direction () override; | |
243 | enum record_method record_method (ptid_t ptid) override; | |
244 | void info_record () override; | |
245 | void save_record (const char *filename) override; | |
246 | bool supports_delete_record () override; | |
247 | void delete_record () override; | |
57810aa7 PA |
248 | bool record_is_replaying (ptid_t ptid) override; |
249 | bool record_will_replay (ptid_t ptid, int dir) override; | |
f6ac5f3d PA |
250 | void record_stop_replaying () override; |
251 | void goto_record_begin () override; | |
252 | void goto_record_end () override; | |
253 | void goto_record (ULONGEST insn) override; | |
254 | }; | |
255 | ||
256 | /* The "record-full" target. */ | |
257 | ||
d9f719f1 PA |
258 | static const target_info record_full_target_info = { |
259 | "record-full", | |
260 | record_longname, | |
261 | record_doc, | |
262 | }; | |
263 | ||
f6ac5f3d PA |
264 | class record_full_target final : public record_full_base_target |
265 | { | |
266 | public: | |
d9f719f1 PA |
267 | const target_info &info () const override |
268 | { return record_full_target_info; } | |
f6ac5f3d | 269 | |
f6ac5f3d PA |
270 | void resume (ptid_t, int, enum gdb_signal) override; |
271 | void disconnect (const char *, int) override; | |
272 | void detach (inferior *, int) override; | |
273 | void mourn_inferior () override; | |
274 | void kill () override; | |
275 | void store_registers (struct regcache *, int) override; | |
276 | enum target_xfer_status xfer_partial (enum target_object object, | |
277 | const char *annex, | |
278 | gdb_byte *readbuf, | |
279 | const gdb_byte *writebuf, | |
280 | ULONGEST offset, ULONGEST len, | |
281 | ULONGEST *xfered_len) override; | |
282 | int insert_breakpoint (struct gdbarch *, | |
283 | struct bp_target_info *) override; | |
284 | int remove_breakpoint (struct gdbarch *, | |
285 | struct bp_target_info *, | |
286 | enum remove_bp_reason) override; | |
287 | }; | |
288 | ||
289 | /* The "record-core" target. */ | |
290 | ||
d9f719f1 PA |
291 | static const target_info record_full_core_target_info = { |
292 | "record-core", | |
293 | record_longname, | |
294 | record_doc, | |
295 | }; | |
296 | ||
f6ac5f3d PA |
297 | class record_full_core_target final : public record_full_base_target |
298 | { | |
299 | public: | |
d9f719f1 PA |
300 | const target_info &info () const override |
301 | { return record_full_core_target_info; } | |
f6ac5f3d PA |
302 | |
303 | void resume (ptid_t, int, enum gdb_signal) override; | |
304 | void disconnect (const char *, int) override; | |
305 | void kill () override; | |
306 | void fetch_registers (struct regcache *regcache, int regno) override; | |
307 | void prepare_to_store (struct regcache *regcache) override; | |
308 | void store_registers (struct regcache *, int) override; | |
309 | enum target_xfer_status xfer_partial (enum target_object object, | |
310 | const char *annex, | |
311 | gdb_byte *readbuf, | |
312 | const gdb_byte *writebuf, | |
313 | ULONGEST offset, ULONGEST len, | |
314 | ULONGEST *xfered_len) override; | |
315 | int insert_breakpoint (struct gdbarch *, | |
316 | struct bp_target_info *) override; | |
317 | int remove_breakpoint (struct gdbarch *, | |
318 | struct bp_target_info *, | |
319 | enum remove_bp_reason) override; | |
320 | ||
5018ce90 | 321 | bool has_execution (inferior *inf) override; |
f6ac5f3d PA |
322 | }; |
323 | ||
324 | static record_full_target record_full_ops; | |
325 | static record_full_core_target record_full_core_ops; | |
326 | ||
327 | void | |
328 | record_full_target::detach (inferior *inf, int from_tty) | |
329 | { | |
330 | record_detach (this, inf, from_tty); | |
331 | } | |
332 | ||
333 | void | |
334 | record_full_target::disconnect (const char *args, int from_tty) | |
335 | { | |
336 | record_disconnect (this, args, from_tty); | |
337 | } | |
338 | ||
339 | void | |
340 | record_full_core_target::disconnect (const char *args, int from_tty) | |
341 | { | |
342 | record_disconnect (this, args, from_tty); | |
343 | } | |
344 | ||
345 | void | |
346 | record_full_target::mourn_inferior () | |
347 | { | |
348 | record_mourn_inferior (this); | |
349 | } | |
350 | ||
351 | void | |
352 | record_full_target::kill () | |
353 | { | |
354 | record_kill (this); | |
355 | } | |
d02ed0bb | 356 | |
8213266a PA |
357 | /* See record-full.h. */ |
358 | ||
359 | int | |
360 | record_full_is_used (void) | |
361 | { | |
362 | struct target_ops *t; | |
363 | ||
364 | t = find_record_target (); | |
365 | return (t == &record_full_ops | |
366 | || t == &record_full_core_ops); | |
367 | } | |
368 | ||
369 | ||
d02ed0bb MM |
370 | /* Command lists for "set/show record full". */ |
371 | static struct cmd_list_element *set_record_full_cmdlist; | |
372 | static struct cmd_list_element *show_record_full_cmdlist; | |
373 | ||
374 | /* Command list for "record full". */ | |
375 | static struct cmd_list_element *record_full_cmdlist; | |
376 | ||
88d1aa9d MM |
377 | static void record_full_goto_insn (struct record_full_entry *entry, |
378 | enum exec_direction_kind dir); | |
88d1aa9d MM |
379 | |
380 | /* Alloc and free functions for record_full_reg, record_full_mem, and | |
381 | record_full_end entries. */ | |
382 | ||
383 | /* Alloc a record_full_reg record entry. */ | |
384 | ||
385 | static inline struct record_full_entry * | |
386 | record_full_reg_alloc (struct regcache *regcache, int regnum) | |
387 | { | |
388 | struct record_full_entry *rec; | |
ac7936df | 389 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb | 390 | |
8d749320 | 391 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 392 | rec->type = record_full_reg; |
d02ed0bb MM |
393 | rec->u.reg.num = regnum; |
394 | rec->u.reg.len = register_size (gdbarch, regnum); | |
395 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
396 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
397 | ||
398 | return rec; | |
399 | } | |
400 | ||
88d1aa9d | 401 | /* Free a record_full_reg record entry. */ |
d02ed0bb MM |
402 | |
403 | static inline void | |
88d1aa9d | 404 | record_full_reg_release (struct record_full_entry *rec) |
d02ed0bb | 405 | { |
88d1aa9d | 406 | gdb_assert (rec->type == record_full_reg); |
d02ed0bb MM |
407 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
408 | xfree (rec->u.reg.u.ptr); | |
409 | xfree (rec); | |
410 | } | |
411 | ||
88d1aa9d | 412 | /* Alloc a record_full_mem record entry. */ |
d02ed0bb | 413 | |
88d1aa9d MM |
414 | static inline struct record_full_entry * |
415 | record_full_mem_alloc (CORE_ADDR addr, int len) | |
d02ed0bb | 416 | { |
88d1aa9d | 417 | struct record_full_entry *rec; |
d02ed0bb | 418 | |
8d749320 | 419 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 420 | rec->type = record_full_mem; |
d02ed0bb MM |
421 | rec->u.mem.addr = addr; |
422 | rec->u.mem.len = len; | |
423 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
424 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
425 | ||
426 | return rec; | |
427 | } | |
428 | ||
88d1aa9d | 429 | /* Free a record_full_mem record entry. */ |
d02ed0bb MM |
430 | |
431 | static inline void | |
88d1aa9d | 432 | record_full_mem_release (struct record_full_entry *rec) |
d02ed0bb | 433 | { |
88d1aa9d | 434 | gdb_assert (rec->type == record_full_mem); |
d02ed0bb MM |
435 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
436 | xfree (rec->u.mem.u.ptr); | |
437 | xfree (rec); | |
438 | } | |
439 | ||
88d1aa9d | 440 | /* Alloc a record_full_end record entry. */ |
d02ed0bb | 441 | |
88d1aa9d MM |
442 | static inline struct record_full_entry * |
443 | record_full_end_alloc (void) | |
d02ed0bb | 444 | { |
88d1aa9d | 445 | struct record_full_entry *rec; |
d02ed0bb | 446 | |
8d749320 | 447 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 448 | rec->type = record_full_end; |
d02ed0bb MM |
449 | |
450 | return rec; | |
451 | } | |
452 | ||
88d1aa9d | 453 | /* Free a record_full_end record entry. */ |
d02ed0bb MM |
454 | |
455 | static inline void | |
88d1aa9d | 456 | record_full_end_release (struct record_full_entry *rec) |
d02ed0bb MM |
457 | { |
458 | xfree (rec); | |
459 | } | |
460 | ||
461 | /* Free one record entry, any type. | |
462 | Return entry->type, in case caller wants to know. */ | |
463 | ||
88d1aa9d MM |
464 | static inline enum record_full_type |
465 | record_full_entry_release (struct record_full_entry *rec) | |
d02ed0bb | 466 | { |
88d1aa9d | 467 | enum record_full_type type = rec->type; |
d02ed0bb MM |
468 | |
469 | switch (type) { | |
88d1aa9d MM |
470 | case record_full_reg: |
471 | record_full_reg_release (rec); | |
d02ed0bb | 472 | break; |
88d1aa9d MM |
473 | case record_full_mem: |
474 | record_full_mem_release (rec); | |
d02ed0bb | 475 | break; |
88d1aa9d MM |
476 | case record_full_end: |
477 | record_full_end_release (rec); | |
d02ed0bb MM |
478 | break; |
479 | } | |
480 | return type; | |
481 | } | |
482 | ||
483 | /* Free all record entries in list pointed to by REC. */ | |
484 | ||
485 | static void | |
88d1aa9d | 486 | record_full_list_release (struct record_full_entry *rec) |
d02ed0bb MM |
487 | { |
488 | if (!rec) | |
489 | return; | |
490 | ||
491 | while (rec->next) | |
492 | rec = rec->next; | |
493 | ||
494 | while (rec->prev) | |
495 | { | |
496 | rec = rec->prev; | |
88d1aa9d | 497 | record_full_entry_release (rec->next); |
d02ed0bb MM |
498 | } |
499 | ||
88d1aa9d | 500 | if (rec == &record_full_first) |
d02ed0bb | 501 | { |
88d1aa9d MM |
502 | record_full_insn_num = 0; |
503 | record_full_first.next = NULL; | |
d02ed0bb MM |
504 | } |
505 | else | |
88d1aa9d | 506 | record_full_entry_release (rec); |
d02ed0bb MM |
507 | } |
508 | ||
509 | /* Free all record entries forward of the given list position. */ | |
510 | ||
511 | static void | |
88d1aa9d | 512 | record_full_list_release_following (struct record_full_entry *rec) |
d02ed0bb | 513 | { |
88d1aa9d | 514 | struct record_full_entry *tmp = rec->next; |
d02ed0bb MM |
515 | |
516 | rec->next = NULL; | |
517 | while (tmp) | |
518 | { | |
519 | rec = tmp->next; | |
88d1aa9d | 520 | if (record_full_entry_release (tmp) == record_full_end) |
d02ed0bb | 521 | { |
88d1aa9d MM |
522 | record_full_insn_num--; |
523 | record_full_insn_count--; | |
d02ed0bb MM |
524 | } |
525 | tmp = rec; | |
526 | } | |
527 | } | |
528 | ||
529 | /* Delete the first instruction from the beginning of the log, to make | |
530 | room for adding a new instruction at the end of the log. | |
531 | ||
88d1aa9d | 532 | Note -- this function does not modify record_full_insn_num. */ |
d02ed0bb MM |
533 | |
534 | static void | |
88d1aa9d | 535 | record_full_list_release_first (void) |
d02ed0bb | 536 | { |
88d1aa9d | 537 | struct record_full_entry *tmp; |
d02ed0bb | 538 | |
88d1aa9d | 539 | if (!record_full_first.next) |
d02ed0bb MM |
540 | return; |
541 | ||
88d1aa9d | 542 | /* Loop until a record_full_end. */ |
d02ed0bb MM |
543 | while (1) |
544 | { | |
88d1aa9d MM |
545 | /* Cut record_full_first.next out of the linked list. */ |
546 | tmp = record_full_first.next; | |
547 | record_full_first.next = tmp->next; | |
548 | tmp->next->prev = &record_full_first; | |
d02ed0bb MM |
549 | |
550 | /* tmp is now isolated, and can be deleted. */ | |
88d1aa9d MM |
551 | if (record_full_entry_release (tmp) == record_full_end) |
552 | break; /* End loop at first record_full_end. */ | |
d02ed0bb | 553 | |
88d1aa9d | 554 | if (!record_full_first.next) |
d02ed0bb | 555 | { |
88d1aa9d | 556 | gdb_assert (record_full_insn_num == 1); |
d02ed0bb MM |
557 | break; /* End loop when list is empty. */ |
558 | } | |
559 | } | |
560 | } | |
561 | ||
88d1aa9d | 562 | /* Add a struct record_full_entry to record_full_arch_list. */ |
d02ed0bb MM |
563 | |
564 | static void | |
88d1aa9d | 565 | record_full_arch_list_add (struct record_full_entry *rec) |
d02ed0bb MM |
566 | { |
567 | if (record_debug > 1) | |
568 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 569 | "Process record: record_full_arch_list_add %s.\n", |
d02ed0bb MM |
570 | host_address_to_string (rec)); |
571 | ||
88d1aa9d | 572 | if (record_full_arch_list_tail) |
d02ed0bb | 573 | { |
88d1aa9d MM |
574 | record_full_arch_list_tail->next = rec; |
575 | rec->prev = record_full_arch_list_tail; | |
576 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
577 | } |
578 | else | |
579 | { | |
88d1aa9d MM |
580 | record_full_arch_list_head = rec; |
581 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
582 | } |
583 | } | |
584 | ||
585 | /* Return the value storage location of a record entry. */ | |
586 | static inline gdb_byte * | |
88d1aa9d | 587 | record_full_get_loc (struct record_full_entry *rec) |
d02ed0bb MM |
588 | { |
589 | switch (rec->type) { | |
88d1aa9d | 590 | case record_full_mem: |
d02ed0bb MM |
591 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
592 | return rec->u.mem.u.ptr; | |
593 | else | |
594 | return rec->u.mem.u.buf; | |
88d1aa9d | 595 | case record_full_reg: |
d02ed0bb MM |
596 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
597 | return rec->u.reg.u.ptr; | |
598 | else | |
599 | return rec->u.reg.u.buf; | |
88d1aa9d | 600 | case record_full_end: |
d02ed0bb | 601 | default: |
88d1aa9d | 602 | gdb_assert_not_reached ("unexpected record_full_entry type"); |
d02ed0bb MM |
603 | return NULL; |
604 | } | |
605 | } | |
606 | ||
88d1aa9d | 607 | /* Record the value of a register NUM to record_full_arch_list. */ |
d02ed0bb MM |
608 | |
609 | int | |
25ea693b | 610 | record_full_arch_list_add_reg (struct regcache *regcache, int regnum) |
d02ed0bb | 611 | { |
88d1aa9d | 612 | struct record_full_entry *rec; |
d02ed0bb MM |
613 | |
614 | if (record_debug > 1) | |
615 | fprintf_unfiltered (gdb_stdlog, | |
616 | "Process record: add register num = %d to " | |
617 | "record list.\n", | |
618 | regnum); | |
619 | ||
88d1aa9d | 620 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 621 | |
0b883586 | 622 | regcache->raw_read (regnum, record_full_get_loc (rec)); |
d02ed0bb | 623 | |
88d1aa9d | 624 | record_full_arch_list_add (rec); |
d02ed0bb MM |
625 | |
626 | return 0; | |
627 | } | |
628 | ||
629 | /* Record the value of a region of memory whose address is ADDR and | |
88d1aa9d | 630 | length is LEN to record_full_arch_list. */ |
d02ed0bb MM |
631 | |
632 | int | |
25ea693b | 633 | record_full_arch_list_add_mem (CORE_ADDR addr, int len) |
d02ed0bb | 634 | { |
88d1aa9d | 635 | struct record_full_entry *rec; |
d02ed0bb MM |
636 | |
637 | if (record_debug > 1) | |
638 | fprintf_unfiltered (gdb_stdlog, | |
639 | "Process record: add mem addr = %s len = %d to " | |
640 | "record list.\n", | |
641 | paddress (target_gdbarch (), addr), len); | |
642 | ||
643 | if (!addr) /* FIXME: Why? Some arch must permit it... */ | |
644 | return 0; | |
645 | ||
88d1aa9d | 646 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb | 647 | |
88d1aa9d MM |
648 | if (record_read_memory (target_gdbarch (), addr, |
649 | record_full_get_loc (rec), len)) | |
d02ed0bb | 650 | { |
88d1aa9d | 651 | record_full_mem_release (rec); |
d02ed0bb MM |
652 | return -1; |
653 | } | |
654 | ||
88d1aa9d | 655 | record_full_arch_list_add (rec); |
d02ed0bb MM |
656 | |
657 | return 0; | |
658 | } | |
659 | ||
88d1aa9d MM |
660 | /* Add a record_full_end type struct record_full_entry to |
661 | record_full_arch_list. */ | |
d02ed0bb MM |
662 | |
663 | int | |
25ea693b | 664 | record_full_arch_list_add_end (void) |
d02ed0bb | 665 | { |
88d1aa9d | 666 | struct record_full_entry *rec; |
d02ed0bb MM |
667 | |
668 | if (record_debug > 1) | |
669 | fprintf_unfiltered (gdb_stdlog, | |
670 | "Process record: add end to arch list.\n"); | |
671 | ||
88d1aa9d | 672 | rec = record_full_end_alloc (); |
d02ed0bb | 673 | rec->u.end.sigval = GDB_SIGNAL_0; |
88d1aa9d | 674 | rec->u.end.insn_num = ++record_full_insn_count; |
d02ed0bb | 675 | |
88d1aa9d | 676 | record_full_arch_list_add (rec); |
d02ed0bb MM |
677 | |
678 | return 0; | |
679 | } | |
680 | ||
681 | static void | |
651ce16a | 682 | record_full_check_insn_num (void) |
d02ed0bb | 683 | { |
7ee70bf5 | 684 | if (record_full_insn_num == record_full_insn_max_num) |
d02ed0bb | 685 | { |
7ee70bf5 PA |
686 | /* Ask user what to do. */ |
687 | if (record_full_stop_at_limit) | |
d02ed0bb | 688 | { |
651ce16a | 689 | if (!yquery (_("Do you want to auto delete previous execution " |
7ee70bf5 | 690 | "log entries when record/replay buffer becomes " |
651ce16a | 691 | "full (record full stop-at-limit)?"))) |
7ee70bf5 | 692 | error (_("Process record: stopped by user.")); |
651ce16a | 693 | record_full_stop_at_limit = 0; |
d02ed0bb MM |
694 | } |
695 | } | |
696 | } | |
697 | ||
d02ed0bb MM |
698 | /* Before inferior step (when GDB record the running message, inferior |
699 | only can step), GDB will call this function to record the values to | |
88d1aa9d | 700 | record_full_list. This function will call gdbarch_process_record to |
d02ed0bb | 701 | record the running message of inferior and set them to |
88d1aa9d | 702 | record_full_arch_list, and add it to record_full_list. */ |
d02ed0bb | 703 | |
bf469271 | 704 | static void |
88d1aa9d | 705 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
706 | { |
707 | int ret; | |
ac7936df | 708 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb | 709 | |
a70b8144 | 710 | try |
1ddbba9d TT |
711 | { |
712 | record_full_arch_list_head = NULL; | |
713 | record_full_arch_list_tail = NULL; | |
d02ed0bb | 714 | |
1ddbba9d TT |
715 | /* Check record_full_insn_num. */ |
716 | record_full_check_insn_num (); | |
717 | ||
718 | /* If gdb sends a signal value to target_resume, | |
719 | save it in the 'end' field of the previous instruction. | |
d02ed0bb | 720 | |
1ddbba9d TT |
721 | Maybe process record should record what really happened, |
722 | rather than what gdb pretends has happened. | |
d02ed0bb | 723 | |
1ddbba9d TT |
724 | So if Linux delivered the signal to the child process during |
725 | the record mode, we will record it and deliver it again in | |
726 | the replay mode. | |
d02ed0bb | 727 | |
1ddbba9d TT |
728 | If user says "ignore this signal" during the record mode, then |
729 | it will be ignored again during the replay mode (no matter if | |
730 | the user says something different, like "deliver this signal" | |
731 | during the replay mode). | |
d02ed0bb | 732 | |
1ddbba9d TT |
733 | User should understand that nothing he does during the replay |
734 | mode will change the behavior of the child. If he tries, | |
735 | then that is a user error. | |
d02ed0bb | 736 | |
1ddbba9d TT |
737 | But we should still deliver the signal to gdb during the replay, |
738 | if we delivered it during the recording. Therefore we should | |
739 | record the signal during record_full_wait, not | |
740 | record_full_resume. */ | |
741 | if (record_full_list != &record_full_first) /* FIXME better way | |
742 | to check */ | |
743 | { | |
744 | gdb_assert (record_full_list->type == record_full_end); | |
745 | record_full_list->u.end.sigval = signal; | |
746 | } | |
d02ed0bb | 747 | |
1ddbba9d TT |
748 | if (signal == GDB_SIGNAL_0 |
749 | || !gdbarch_process_record_signal_p (gdbarch)) | |
750 | ret = gdbarch_process_record (gdbarch, | |
751 | regcache, | |
752 | regcache_read_pc (regcache)); | |
753 | else | |
754 | ret = gdbarch_process_record_signal (gdbarch, | |
755 | regcache, | |
756 | signal); | |
757 | ||
758 | if (ret > 0) | |
759 | error (_("Process record: inferior program stopped.")); | |
760 | if (ret < 0) | |
761 | error (_("Process record: failed to record execution log.")); | |
762 | } | |
230d2906 | 763 | catch (const gdb_exception &ex) |
d02ed0bb | 764 | { |
1ddbba9d | 765 | record_full_list_release (record_full_arch_list_tail); |
eedc3f4f | 766 | throw; |
d02ed0bb | 767 | } |
d02ed0bb | 768 | |
88d1aa9d MM |
769 | record_full_list->next = record_full_arch_list_head; |
770 | record_full_arch_list_head->prev = record_full_list; | |
771 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 772 | |
7ee70bf5 | 773 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 774 | record_full_list_release_first (); |
d02ed0bb | 775 | else |
88d1aa9d | 776 | record_full_insn_num++; |
d02ed0bb MM |
777 | } |
778 | ||
bf469271 | 779 | static bool |
88d1aa9d MM |
780 | record_full_message_wrapper_safe (struct regcache *regcache, |
781 | enum gdb_signal signal) | |
d02ed0bb | 782 | { |
a70b8144 | 783 | try |
bf469271 PA |
784 | { |
785 | record_full_message (regcache, signal); | |
786 | } | |
230d2906 | 787 | catch (const gdb_exception &ex) |
bf469271 PA |
788 | { |
789 | exception_print (gdb_stderr, ex); | |
790 | return false; | |
791 | } | |
d02ed0bb | 792 | |
bf469271 | 793 | return true; |
d02ed0bb MM |
794 | } |
795 | ||
88d1aa9d | 796 | /* Set to 1 if record_full_store_registers and record_full_xfer_partial |
d02ed0bb MM |
797 | doesn't need record. */ |
798 | ||
88d1aa9d | 799 | static int record_full_gdb_operation_disable = 0; |
d02ed0bb | 800 | |
07036511 | 801 | scoped_restore_tmpl<int> |
25ea693b | 802 | record_full_gdb_operation_disable_set (void) |
d02ed0bb | 803 | { |
07036511 | 804 | return make_scoped_restore (&record_full_gdb_operation_disable, 1); |
d02ed0bb MM |
805 | } |
806 | ||
807 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ | |
9e8915c6 PA |
808 | static enum target_stop_reason record_full_stop_reason |
809 | = TARGET_STOPPED_BY_NO_REASON; | |
d02ed0bb MM |
810 | |
811 | /* Execute one instruction from the record log. Each instruction in | |
812 | the log will be represented by an arbitrary sequence of register | |
813 | entries and memory entries, followed by an 'end' entry. */ | |
814 | ||
815 | static inline void | |
88d1aa9d MM |
816 | record_full_exec_insn (struct regcache *regcache, |
817 | struct gdbarch *gdbarch, | |
818 | struct record_full_entry *entry) | |
d02ed0bb MM |
819 | { |
820 | switch (entry->type) | |
821 | { | |
88d1aa9d | 822 | case record_full_reg: /* reg */ |
d02ed0bb | 823 | { |
d7dcbefc | 824 | gdb::byte_vector reg (entry->u.reg.len); |
d02ed0bb | 825 | |
dda83cd7 SM |
826 | if (record_debug > 1) |
827 | fprintf_unfiltered (gdb_stdlog, | |
828 | "Process record: record_full_reg %s to " | |
829 | "inferior num = %d.\n", | |
830 | host_address_to_string (entry), | |
831 | entry->u.reg.num); | |
d02ed0bb | 832 | |
dda83cd7 SM |
833 | regcache->cooked_read (entry->u.reg.num, reg.data ()); |
834 | regcache->cooked_write (entry->u.reg.num, record_full_get_loc (entry)); | |
835 | memcpy (record_full_get_loc (entry), reg.data (), entry->u.reg.len); | |
d02ed0bb MM |
836 | } |
837 | break; | |
838 | ||
88d1aa9d | 839 | case record_full_mem: /* mem */ |
d02ed0bb MM |
840 | { |
841 | /* Nothing to do if the entry is flagged not_accessible. */ | |
dda83cd7 SM |
842 | if (!entry->u.mem.mem_entry_not_accessible) |
843 | { | |
a2b2bc12 | 844 | gdb::byte_vector mem (entry->u.mem.len); |
d02ed0bb | 845 | |
dda83cd7 SM |
846 | if (record_debug > 1) |
847 | fprintf_unfiltered (gdb_stdlog, | |
848 | "Process record: record_full_mem %s to " | |
849 | "inferior addr = %s len = %d.\n", | |
850 | host_address_to_string (entry), | |
851 | paddress (gdbarch, entry->u.mem.addr), | |
852 | entry->u.mem.len); | |
d02ed0bb | 853 | |
dda83cd7 | 854 | if (record_read_memory (gdbarch, |
a2b2bc12 TT |
855 | entry->u.mem.addr, mem.data (), |
856 | entry->u.mem.len)) | |
d02ed0bb | 857 | entry->u.mem.mem_entry_not_accessible = 1; |
dda83cd7 SM |
858 | else |
859 | { | |
860 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 861 | record_full_get_loc (entry), |
d02ed0bb | 862 | entry->u.mem.len)) |
dda83cd7 SM |
863 | { |
864 | entry->u.mem.mem_entry_not_accessible = 1; | |
865 | if (record_debug) | |
866 | warning (_("Process record: error writing memory at " | |
d02ed0bb | 867 | "addr = %s len = %d."), |
dda83cd7 SM |
868 | paddress (gdbarch, entry->u.mem.addr), |
869 | entry->u.mem.len); | |
870 | } | |
871 | else | |
d02ed0bb | 872 | { |
a2b2bc12 | 873 | memcpy (record_full_get_loc (entry), mem.data (), |
88d1aa9d | 874 | entry->u.mem.len); |
d02ed0bb MM |
875 | |
876 | /* We've changed memory --- check if a hardware | |
877 | watchpoint should trap. Note that this | |
878 | presently assumes the target beneath supports | |
879 | continuable watchpoints. On non-continuable | |
880 | watchpoints target, we'll want to check this | |
881 | _before_ actually doing the memory change, and | |
882 | not doing the change at all if the watchpoint | |
883 | traps. */ | |
884 | if (hardware_watchpoint_inserted_in_range | |
a01bda52 | 885 | (regcache->aspace (), |
d02ed0bb | 886 | entry->u.mem.addr, entry->u.mem.len)) |
9e8915c6 | 887 | record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 888 | } |
dda83cd7 SM |
889 | } |
890 | } | |
d02ed0bb MM |
891 | } |
892 | break; | |
893 | } | |
894 | } | |
895 | ||
88d1aa9d | 896 | static void record_full_restore (void); |
d02ed0bb MM |
897 | |
898 | /* Asynchronous signal handle registered as event loop source for when | |
899 | we have pending events ready to be passed to the core. */ | |
900 | ||
88d1aa9d | 901 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
902 | |
903 | static void | |
88d1aa9d | 904 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb | 905 | { |
b1a35af2 | 906 | inferior_event_handler (INF_REG_EVENT); |
d02ed0bb MM |
907 | } |
908 | ||
d9f719f1 | 909 | /* Open the process record target for 'core' files. */ |
d02ed0bb MM |
910 | |
911 | static void | |
014f9477 | 912 | record_full_core_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
913 | { |
914 | struct regcache *regcache = get_current_regcache (); | |
ac7936df | 915 | int regnum = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
916 | int i; |
917 | ||
88d1aa9d | 918 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 919 | target_fetch_registers (regcache, -1); |
c8ec2f33 YQ |
920 | record_full_core_regbuf = new detached_regcache (regcache->arch (), false); |
921 | ||
d02ed0bb | 922 | for (i = 0; i < regnum; i ++) |
c8ec2f33 | 923 | record_full_core_regbuf->raw_supply (i, *regcache); |
d02ed0bb | 924 | |
2d128614 | 925 | record_full_core_sections = build_section_table (core_bfd); |
d02ed0bb | 926 | |
02980c56 | 927 | current_inferior ()->push_target (&record_full_core_ops); |
88d1aa9d | 928 | record_full_restore (); |
d02ed0bb MM |
929 | } |
930 | ||
d9f719f1 | 931 | /* Open the process record target for 'live' processes. */ |
d02ed0bb MM |
932 | |
933 | static void | |
014f9477 | 934 | record_full_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
935 | { |
936 | if (record_debug) | |
0a0640e3 | 937 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open_1\n"); |
d02ed0bb MM |
938 | |
939 | /* check exec */ | |
55f6301a | 940 | if (!target_has_execution ()) |
d02ed0bb MM |
941 | error (_("Process record: the program is not being run.")); |
942 | if (non_stop) | |
943 | error (_("Process record target can't debug inferior in non-stop mode " | |
944 | "(non-stop).")); | |
945 | ||
946 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
947 | error (_("Process record: the current architecture doesn't support " | |
948 | "record function.")); | |
949 | ||
02980c56 | 950 | current_inferior ()->push_target (&record_full_ops); |
d02ed0bb MM |
951 | } |
952 | ||
88d1aa9d | 953 | static void record_full_init_record_breakpoints (void); |
d02ed0bb | 954 | |
d9f719f1 | 955 | /* Open the process record target. */ |
d02ed0bb | 956 | |
d9f719f1 PA |
957 | static void |
958 | record_full_open (const char *name, int from_tty) | |
d02ed0bb | 959 | { |
d02ed0bb | 960 | if (record_debug) |
88d1aa9d | 961 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 962 | |
8213266a | 963 | record_preopen (); |
d02ed0bb | 964 | |
d02ed0bb | 965 | /* Reset */ |
88d1aa9d MM |
966 | record_full_insn_num = 0; |
967 | record_full_insn_count = 0; | |
968 | record_full_list = &record_full_first; | |
969 | record_full_list->next = NULL; | |
d02ed0bb | 970 | |
d02ed0bb | 971 | if (core_bfd) |
88d1aa9d | 972 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 973 | else |
88d1aa9d | 974 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
975 | |
976 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
977 | record_full_async_inferior_event_token |
978 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
db20ebdf | 979 | NULL, "record-full"); |
d02ed0bb | 980 | |
88d1aa9d | 981 | record_full_init_record_breakpoints (); |
d02ed0bb | 982 | |
76727919 | 983 | gdb::observers::record_changed.notify (current_inferior (), 1, "full", NULL); |
d02ed0bb MM |
984 | } |
985 | ||
f6ac5f3d | 986 | /* "close" target method. Close the process record target. */ |
d02ed0bb | 987 | |
f6ac5f3d PA |
988 | void |
989 | record_full_base_target::close () | |
d02ed0bb | 990 | { |
88d1aa9d | 991 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
992 | |
993 | if (record_debug) | |
88d1aa9d | 994 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 995 | |
88d1aa9d | 996 | record_full_list_release (record_full_list); |
d02ed0bb | 997 | |
88d1aa9d MM |
998 | /* Release record_full_core_regbuf. */ |
999 | if (record_full_core_regbuf) | |
d02ed0bb | 1000 | { |
c8ec2f33 | 1001 | delete record_full_core_regbuf; |
88d1aa9d | 1002 | record_full_core_regbuf = NULL; |
d02ed0bb MM |
1003 | } |
1004 | ||
88d1aa9d | 1005 | /* Release record_full_core_buf_list. */ |
ec70d8db | 1006 | while (record_full_core_buf_list) |
d02ed0bb | 1007 | { |
ec70d8db PW |
1008 | entry = record_full_core_buf_list; |
1009 | record_full_core_buf_list = record_full_core_buf_list->prev; | |
1010 | xfree (entry); | |
d02ed0bb MM |
1011 | } |
1012 | ||
88d1aa9d MM |
1013 | if (record_full_async_inferior_event_token) |
1014 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
1015 | } |
1016 | ||
f6ac5f3d | 1017 | /* "async" target method. */ |
b7d2e916 | 1018 | |
f6ac5f3d PA |
1019 | void |
1020 | record_full_base_target::async (int enable) | |
b7d2e916 | 1021 | { |
6a3753b3 | 1022 | if (enable) |
b7d2e916 PA |
1023 | mark_async_event_handler (record_full_async_inferior_event_token); |
1024 | else | |
1025 | clear_async_event_handler (record_full_async_inferior_event_token); | |
1026 | ||
b6a8c27b | 1027 | beneath ()->async (enable); |
b7d2e916 PA |
1028 | } |
1029 | ||
ec506636 PA |
1030 | /* The PTID and STEP arguments last passed to |
1031 | record_full_target::resume. */ | |
1032 | static ptid_t record_full_resume_ptid = null_ptid; | |
88d1aa9d | 1033 | static int record_full_resume_step = 0; |
d02ed0bb | 1034 | |
88d1aa9d MM |
1035 | /* True if we've been resumed, and so each record_full_wait call should |
1036 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 1037 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 1038 | static int record_full_resumed = 0; |
d02ed0bb MM |
1039 | |
1040 | /* The execution direction of the last resume we got. This is | |
1041 | necessary for async mode. Vis (order is not strictly accurate): | |
1042 | ||
1043 | 1. user has the global execution direction set to forward | |
1044 | 2. user does a reverse-step command | |
88d1aa9d | 1045 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
1046 | temporarily switched to reverse |
1047 | 4. GDB's execution direction is reverted back to forward | |
1048 | 5. target record notifies event loop there's an event to handle | |
1049 | 6. infrun asks the target which direction was it going, and switches | |
1050 | the global execution direction accordingly (to reverse) | |
1051 | 7. infrun polls an event out of the record target, and handles it | |
1052 | 8. GDB goes back to the event loop, and goto #4. | |
1053 | */ | |
88d1aa9d | 1054 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb | 1055 | |
f6ac5f3d | 1056 | /* "resume" target method. Resume the process record target. */ |
d02ed0bb | 1057 | |
f6ac5f3d PA |
1058 | void |
1059 | record_full_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
d02ed0bb | 1060 | { |
ec506636 | 1061 | record_full_resume_ptid = inferior_ptid; |
88d1aa9d MM |
1062 | record_full_resume_step = step; |
1063 | record_full_resumed = 1; | |
f6ac5f3d | 1064 | record_full_execution_dir = ::execution_direction; |
d02ed0bb | 1065 | |
88d1aa9d | 1066 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1067 | { |
1068 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
1069 | ||
88d1aa9d | 1070 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
1071 | |
1072 | if (!step) | |
dda83cd7 SM |
1073 | { |
1074 | /* This is not hard single step. */ | |
1075 | if (!gdbarch_software_single_step_p (gdbarch)) | |
1076 | { | |
1077 | /* This is a normal continue. */ | |
1078 | step = 1; | |
1079 | } | |
1080 | else | |
1081 | { | |
1082 | /* This arch supports soft single step. */ | |
1083 | if (thread_has_single_step_breakpoints_set (inferior_thread ())) | |
1084 | { | |
1085 | /* This is a soft single step. */ | |
1086 | record_full_resume_step = 1; | |
1087 | } | |
1088 | else | |
93f9a11f | 1089 | step = !insert_single_step_breakpoints (gdbarch); |
dda83cd7 SM |
1090 | } |
1091 | } | |
d02ed0bb MM |
1092 | |
1093 | /* Make sure the target beneath reports all signals. */ | |
adc6a863 | 1094 | target_pass_signals ({}); |
d02ed0bb | 1095 | |
b6a8c27b | 1096 | this->beneath ()->resume (ptid, step, signal); |
d02ed0bb MM |
1097 | } |
1098 | ||
1099 | /* We are about to start executing the inferior (or simulate it), | |
1100 | let's register it with the event loop. */ | |
1101 | if (target_can_async_p ()) | |
6a3753b3 | 1102 | target_async (1); |
d02ed0bb MM |
1103 | } |
1104 | ||
88d1aa9d | 1105 | static int record_full_get_sig = 0; |
d02ed0bb | 1106 | |
f6ac5f3d | 1107 | /* SIGINT signal handler, registered by "wait" method. */ |
d02ed0bb MM |
1108 | |
1109 | static void | |
88d1aa9d | 1110 | record_full_sig_handler (int signo) |
d02ed0bb MM |
1111 | { |
1112 | if (record_debug) | |
1113 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1114 | ||
1115 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 1116 | record_full_resume_step = 1; |
d02ed0bb | 1117 | |
88d1aa9d | 1118 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1119 | SIGINT. */ |
88d1aa9d | 1120 | record_full_get_sig = 1; |
d02ed0bb MM |
1121 | } |
1122 | ||
f6ac5f3d | 1123 | /* "wait" target method for process record target. |
d02ed0bb MM |
1124 | |
1125 | In record mode, the target is always run in singlestep mode | |
f6ac5f3d | 1126 | (even when gdb says to continue). The wait method intercepts |
d02ed0bb MM |
1127 | the stop events and determines which ones are to be passed on to |
1128 | gdb. Most stop events are just singlestep events that gdb is not | |
f6ac5f3d | 1129 | to know about, so the wait method just records them and keeps |
d02ed0bb MM |
1130 | singlestepping. |
1131 | ||
1132 | In replay mode, this function emulates the recorded execution log, | |
1133 | one instruction at a time (forward or backward), and determines | |
1134 | where to stop. */ | |
1135 | ||
1136 | static ptid_t | |
88d1aa9d MM |
1137 | record_full_wait_1 (struct target_ops *ops, |
1138 | ptid_t ptid, struct target_waitstatus *status, | |
b60cea74 | 1139 | target_wait_flags options) |
d02ed0bb | 1140 | { |
07036511 TT |
1141 | scoped_restore restore_operation_disable |
1142 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
1143 | |
1144 | if (record_debug) | |
1145 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1146 | "Process record: record_full_wait " |
1147 | "record_full_resume_step = %d, " | |
1148 | "record_full_resumed = %d, direction=%s\n", | |
1149 | record_full_resume_step, record_full_resumed, | |
1150 | record_full_execution_dir == EXEC_FORWARD | |
1151 | ? "forward" : "reverse"); | |
1152 | ||
1153 | if (!record_full_resumed) | |
d02ed0bb MM |
1154 | { |
1155 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1156 | ||
1157 | /* No interesting event. */ | |
1158 | status->kind = TARGET_WAITKIND_IGNORE; | |
1159 | return minus_one_ptid; | |
1160 | } | |
1161 | ||
88d1aa9d MM |
1162 | record_full_get_sig = 0; |
1163 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1164 | |
9e8915c6 PA |
1165 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1166 | ||
88d1aa9d | 1167 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1168 | { |
88d1aa9d | 1169 | if (record_full_resume_step) |
d02ed0bb MM |
1170 | { |
1171 | /* This is a single step. */ | |
b6a8c27b | 1172 | return ops->beneath ()->wait (ptid, status, options); |
d02ed0bb MM |
1173 | } |
1174 | else | |
1175 | { | |
1176 | /* This is not a single step. */ | |
1177 | ptid_t ret; | |
1178 | CORE_ADDR tmp_pc; | |
ec506636 PA |
1179 | struct gdbarch *gdbarch |
1180 | = target_thread_architecture (record_full_resume_ptid); | |
d02ed0bb MM |
1181 | |
1182 | while (1) | |
1183 | { | |
b6a8c27b | 1184 | ret = ops->beneath ()->wait (ptid, status, options); |
d02ed0bb MM |
1185 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1186 | { | |
1187 | if (record_debug) | |
1188 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1189 | "Process record: record_full_wait " |
d02ed0bb MM |
1190 | "target beneath not done yet\n"); |
1191 | return ret; | |
1192 | } | |
1193 | ||
08036331 | 1194 | for (thread_info *tp : all_non_exited_threads ()) |
dda83cd7 | 1195 | delete_single_step_breakpoints (tp); |
d02ed0bb | 1196 | |
88d1aa9d | 1197 | if (record_full_resume_step) |
d02ed0bb MM |
1198 | return ret; |
1199 | ||
1200 | /* Is this a SIGTRAP? */ | |
1201 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1202 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1203 | { | |
1204 | struct regcache *regcache; | |
9e8915c6 PA |
1205 | enum target_stop_reason *stop_reason_p |
1206 | = &record_full_stop_reason; | |
d02ed0bb MM |
1207 | |
1208 | /* Yes -- this is likely our single-step finishing, | |
1209 | but check if there's any reason the core would be | |
1210 | interested in the event. */ | |
1211 | ||
1212 | registers_changed (); | |
5b6d1e4f PA |
1213 | switch_to_thread (current_inferior ()->process_target (), |
1214 | ret); | |
d02ed0bb MM |
1215 | regcache = get_current_regcache (); |
1216 | tmp_pc = regcache_read_pc (regcache); | |
8b86c959 | 1217 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb MM |
1218 | |
1219 | if (target_stopped_by_watchpoint ()) | |
1220 | { | |
1221 | /* Always interested in watchpoints. */ | |
1222 | } | |
9e8915c6 PA |
1223 | else if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1224 | stop_reason_p)) | |
d02ed0bb MM |
1225 | { |
1226 | /* There is a breakpoint here. Let the core | |
1227 | handle it. */ | |
d02ed0bb MM |
1228 | } |
1229 | else | |
1230 | { | |
1231 | /* This is a single-step trap. Record the | |
dda83cd7 SM |
1232 | insn and issue another step. |
1233 | FIXME: this part can be a random SIGTRAP too. | |
1234 | But GDB cannot handle it. */ | |
1235 | int step = 1; | |
d02ed0bb | 1236 | |
88d1aa9d MM |
1237 | if (!record_full_message_wrapper_safe (regcache, |
1238 | GDB_SIGNAL_0)) | |
d02ed0bb | 1239 | { |
dda83cd7 SM |
1240 | status->kind = TARGET_WAITKIND_STOPPED; |
1241 | status->value.sig = GDB_SIGNAL_0; | |
1242 | break; | |
d02ed0bb MM |
1243 | } |
1244 | ||
dda83cd7 | 1245 | if (gdbarch_software_single_step_p (gdbarch)) |
d02ed0bb | 1246 | { |
5b6d1e4f PA |
1247 | process_stratum_target *proc_target |
1248 | = current_inferior ()->process_target (); | |
1249 | ||
d02ed0bb MM |
1250 | /* Try to insert the software single step breakpoint. |
1251 | If insert success, set step to 0. */ | |
719546c4 | 1252 | set_executing (proc_target, inferior_ptid, false); |
d02ed0bb | 1253 | reinit_frame_cache (); |
93f9a11f YQ |
1254 | |
1255 | step = !insert_single_step_breakpoints (gdbarch); | |
1256 | ||
719546c4 | 1257 | set_executing (proc_target, inferior_ptid, true); |
d02ed0bb MM |
1258 | } |
1259 | ||
1260 | if (record_debug) | |
1261 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1262 | "Process record: record_full_wait " |
1263 | "issuing one more step in the " | |
1264 | "target beneath\n"); | |
b6a8c27b PA |
1265 | ops->beneath ()->resume (ptid, step, GDB_SIGNAL_0); |
1266 | ops->beneath ()->commit_resume (); | |
d02ed0bb MM |
1267 | continue; |
1268 | } | |
1269 | } | |
1270 | ||
1271 | /* The inferior is broken by a breakpoint or a signal. */ | |
1272 | break; | |
1273 | } | |
1274 | ||
1275 | return ret; | |
1276 | } | |
1277 | } | |
1278 | else | |
1279 | { | |
5b6d1e4f PA |
1280 | switch_to_thread (current_inferior ()->process_target (), |
1281 | record_full_resume_ptid); | |
d02ed0bb | 1282 | struct regcache *regcache = get_current_regcache (); |
ac7936df | 1283 | struct gdbarch *gdbarch = regcache->arch (); |
8b86c959 | 1284 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb | 1285 | int continue_flag = 1; |
88d1aa9d | 1286 | int first_record_full_end = 1; |
d02ed0bb | 1287 | |
a70b8144 | 1288 | try |
d02ed0bb | 1289 | { |
1ddbba9d | 1290 | CORE_ADDR tmp_pc; |
d02ed0bb | 1291 | |
1ddbba9d TT |
1292 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1293 | status->kind = TARGET_WAITKIND_STOPPED; | |
d02ed0bb | 1294 | |
1ddbba9d TT |
1295 | /* Check breakpoint when forward execute. */ |
1296 | if (execution_direction == EXEC_FORWARD) | |
d02ed0bb | 1297 | { |
1ddbba9d TT |
1298 | tmp_pc = regcache_read_pc (regcache); |
1299 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, | |
1300 | &record_full_stop_reason)) | |
1301 | { | |
1302 | if (record_debug) | |
1303 | fprintf_unfiltered (gdb_stdlog, | |
1304 | "Process record: break at %s.\n", | |
1305 | paddress (gdbarch, tmp_pc)); | |
1306 | goto replay_out; | |
1307 | } | |
d02ed0bb MM |
1308 | } |
1309 | ||
1ddbba9d TT |
1310 | /* If GDB is in terminal_inferior mode, it will not get the |
1311 | signal. And in GDB replay mode, GDB doesn't need to be | |
1312 | in terminal_inferior mode, because inferior will not | |
1313 | executed. Then set it to terminal_ours to make GDB get | |
1314 | the signal. */ | |
1315 | target_terminal::ours (); | |
1316 | ||
1317 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev | |
1318 | instruction. */ | |
1319 | if (execution_direction == EXEC_FORWARD && record_full_list->next) | |
1320 | record_full_list = record_full_list->next; | |
1321 | ||
1322 | /* Loop over the record_full_list, looking for the next place to | |
1323 | stop. */ | |
1324 | do | |
d02ed0bb | 1325 | { |
1ddbba9d TT |
1326 | /* Check for beginning and end of log. */ |
1327 | if (execution_direction == EXEC_REVERSE | |
1328 | && record_full_list == &record_full_first) | |
d02ed0bb | 1329 | { |
1ddbba9d TT |
1330 | /* Hit beginning of record log in reverse. */ |
1331 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1332 | break; | |
d02ed0bb | 1333 | } |
1ddbba9d TT |
1334 | if (execution_direction != EXEC_REVERSE |
1335 | && !record_full_list->next) | |
1336 | { | |
1337 | /* Hit end of record log going forward. */ | |
1338 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1339 | break; | |
1340 | } | |
1341 | ||
1342 | record_full_exec_insn (regcache, gdbarch, record_full_list); | |
1343 | ||
1344 | if (record_full_list->type == record_full_end) | |
d02ed0bb | 1345 | { |
1ddbba9d TT |
1346 | if (record_debug > 1) |
1347 | fprintf_unfiltered | |
1348 | (gdb_stdlog, | |
1349 | "Process record: record_full_end %s to " | |
1350 | "inferior.\n", | |
1351 | host_address_to_string (record_full_list)); | |
1352 | ||
1353 | if (first_record_full_end | |
1354 | && execution_direction == EXEC_REVERSE) | |
d02ed0bb | 1355 | { |
85102364 | 1356 | /* When reverse execute, the first |
1ddbba9d TT |
1357 | record_full_end is the part of current |
1358 | instruction. */ | |
1359 | first_record_full_end = 0; | |
d02ed0bb | 1360 | } |
1ddbba9d | 1361 | else |
d02ed0bb | 1362 | { |
1ddbba9d TT |
1363 | /* In EXEC_REVERSE mode, this is the |
1364 | record_full_end of prev instruction. In | |
1365 | EXEC_FORWARD mode, this is the | |
1366 | record_full_end of current instruction. */ | |
1367 | /* step */ | |
1368 | if (record_full_resume_step) | |
1369 | { | |
1370 | if (record_debug > 1) | |
1371 | fprintf_unfiltered (gdb_stdlog, | |
1372 | "Process record: step.\n"); | |
1373 | continue_flag = 0; | |
1374 | } | |
9e8915c6 | 1375 | |
1ddbba9d TT |
1376 | /* check breakpoint */ |
1377 | tmp_pc = regcache_read_pc (regcache); | |
1378 | if (record_check_stopped_by_breakpoint | |
1379 | (aspace, tmp_pc, &record_full_stop_reason)) | |
1380 | { | |
1381 | if (record_debug) | |
1382 | fprintf_unfiltered (gdb_stdlog, | |
1383 | "Process record: break " | |
1384 | "at %s.\n", | |
1385 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb | 1386 | |
1ddbba9d TT |
1387 | continue_flag = 0; |
1388 | } | |
1389 | ||
1390 | if (record_full_stop_reason | |
1391 | == TARGET_STOPPED_BY_WATCHPOINT) | |
1392 | { | |
1393 | if (record_debug) | |
1394 | fprintf_unfiltered (gdb_stdlog, | |
1395 | "Process record: hit hw " | |
1396 | "watchpoint.\n"); | |
1397 | continue_flag = 0; | |
1398 | } | |
1399 | /* Check target signal */ | |
1400 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) | |
1401 | /* FIXME: better way to check */ | |
1402 | continue_flag = 0; | |
d02ed0bb | 1403 | } |
d02ed0bb | 1404 | } |
d02ed0bb | 1405 | |
1ddbba9d | 1406 | if (continue_flag) |
d02ed0bb | 1407 | { |
1ddbba9d TT |
1408 | if (execution_direction == EXEC_REVERSE) |
1409 | { | |
1410 | if (record_full_list->prev) | |
1411 | record_full_list = record_full_list->prev; | |
1412 | } | |
1413 | else | |
1414 | { | |
1415 | if (record_full_list->next) | |
1416 | record_full_list = record_full_list->next; | |
1417 | } | |
d02ed0bb MM |
1418 | } |
1419 | } | |
1ddbba9d TT |
1420 | while (continue_flag); |
1421 | ||
1422 | replay_out: | |
1423 | if (record_full_get_sig) | |
1424 | status->value.sig = GDB_SIGNAL_INT; | |
1425 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) | |
1426 | /* FIXME: better way to check */ | |
1427 | status->value.sig = record_full_list->u.end.sigval; | |
1428 | else | |
1429 | status->value.sig = GDB_SIGNAL_TRAP; | |
d02ed0bb | 1430 | } |
230d2906 | 1431 | catch (const gdb_exception &ex) |
1ddbba9d TT |
1432 | { |
1433 | if (execution_direction == EXEC_REVERSE) | |
1434 | { | |
1435 | if (record_full_list->next) | |
1436 | record_full_list = record_full_list->next; | |
1437 | } | |
1438 | else | |
1439 | record_full_list = record_full_list->prev; | |
d02ed0bb | 1440 | |
eedc3f4f | 1441 | throw; |
1ddbba9d | 1442 | } |
d02ed0bb MM |
1443 | } |
1444 | ||
1445 | signal (SIGINT, handle_sigint); | |
1446 | ||
d02ed0bb MM |
1447 | return inferior_ptid; |
1448 | } | |
1449 | ||
f6ac5f3d PA |
1450 | ptid_t |
1451 | record_full_base_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
b60cea74 | 1452 | target_wait_flags options) |
d02ed0bb MM |
1453 | { |
1454 | ptid_t return_ptid; | |
1455 | ||
fdbc5215 SM |
1456 | clear_async_event_handler (record_full_async_inferior_event_token); |
1457 | ||
f6ac5f3d | 1458 | return_ptid = record_full_wait_1 (this, ptid, status, options); |
d02ed0bb MM |
1459 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1460 | { | |
1461 | /* We're reporting a stop. Make sure any spurious | |
1462 | target_wait(WNOHANG) doesn't advance the target until the | |
1463 | core wants us resumed again. */ | |
88d1aa9d | 1464 | record_full_resumed = 0; |
d02ed0bb MM |
1465 | } |
1466 | return return_ptid; | |
1467 | } | |
1468 | ||
57810aa7 | 1469 | bool |
f6ac5f3d | 1470 | record_full_base_target::stopped_by_watchpoint () |
d02ed0bb | 1471 | { |
88d1aa9d | 1472 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1473 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1474 | else |
b6a8c27b | 1475 | return beneath ()->stopped_by_watchpoint (); |
d02ed0bb MM |
1476 | } |
1477 | ||
57810aa7 | 1478 | bool |
f6ac5f3d | 1479 | record_full_base_target::stopped_data_address (CORE_ADDR *addr_p) |
d02ed0bb | 1480 | { |
88d1aa9d | 1481 | if (RECORD_FULL_IS_REPLAY) |
57810aa7 | 1482 | return false; |
d02ed0bb | 1483 | else |
b6a8c27b | 1484 | return this->beneath ()->stopped_data_address (addr_p); |
d02ed0bb MM |
1485 | } |
1486 | ||
f6ac5f3d | 1487 | /* The stopped_by_sw_breakpoint method of target record-full. */ |
9e8915c6 | 1488 | |
57810aa7 | 1489 | bool |
f6ac5f3d | 1490 | record_full_base_target::stopped_by_sw_breakpoint () |
9e8915c6 PA |
1491 | { |
1492 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1493 | } | |
1494 | ||
f6ac5f3d | 1495 | /* The supports_stopped_by_sw_breakpoint method of target |
9e8915c6 PA |
1496 | record-full. */ |
1497 | ||
57810aa7 | 1498 | bool |
f6ac5f3d | 1499 | record_full_base_target::supports_stopped_by_sw_breakpoint () |
9e8915c6 | 1500 | { |
57810aa7 | 1501 | return true; |
9e8915c6 PA |
1502 | } |
1503 | ||
f6ac5f3d | 1504 | /* The stopped_by_hw_breakpoint method of target record-full. */ |
9e8915c6 | 1505 | |
57810aa7 | 1506 | bool |
f6ac5f3d | 1507 | record_full_base_target::stopped_by_hw_breakpoint () |
9e8915c6 PA |
1508 | { |
1509 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_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_hw_breakpoint () |
9e8915c6 | 1517 | { |
57810aa7 | 1518 | return true; |
9e8915c6 PA |
1519 | } |
1520 | ||
d02ed0bb MM |
1521 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1522 | ||
1523 | static void | |
88d1aa9d | 1524 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1525 | { |
88d1aa9d | 1526 | /* Check record_full_insn_num. */ |
651ce16a | 1527 | record_full_check_insn_num (); |
d02ed0bb | 1528 | |
88d1aa9d MM |
1529 | record_full_arch_list_head = NULL; |
1530 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1531 | |
1532 | if (regnum < 0) | |
1533 | { | |
1534 | int i; | |
1535 | ||
ac7936df | 1536 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
d02ed0bb | 1537 | { |
25ea693b | 1538 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1539 | { |
88d1aa9d | 1540 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1541 | error (_("Process record: failed to record execution log.")); |
1542 | } | |
1543 | } | |
1544 | } | |
1545 | else | |
1546 | { | |
25ea693b | 1547 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1548 | { |
88d1aa9d | 1549 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1550 | error (_("Process record: failed to record execution log.")); |
1551 | } | |
1552 | } | |
25ea693b | 1553 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1554 | { |
88d1aa9d | 1555 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1556 | error (_("Process record: failed to record execution log.")); |
1557 | } | |
88d1aa9d MM |
1558 | record_full_list->next = record_full_arch_list_head; |
1559 | record_full_arch_list_head->prev = record_full_list; | |
1560 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1561 | |
7ee70bf5 | 1562 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1563 | record_full_list_release_first (); |
d02ed0bb | 1564 | else |
88d1aa9d | 1565 | record_full_insn_num++; |
d02ed0bb MM |
1566 | } |
1567 | ||
f6ac5f3d | 1568 | /* "store_registers" method for process record target. */ |
d02ed0bb | 1569 | |
f6ac5f3d PA |
1570 | void |
1571 | record_full_target::store_registers (struct regcache *regcache, int regno) | |
d02ed0bb | 1572 | { |
88d1aa9d | 1573 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1574 | { |
88d1aa9d | 1575 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1576 | { |
1577 | int n; | |
1578 | ||
1579 | /* Let user choose if he wants to write register or not. */ | |
1580 | if (regno < 0) | |
1581 | n = | |
1582 | query (_("Because GDB is in replay mode, changing the " | |
1583 | "value of a register will make the execution " | |
1584 | "log unusable from this point onward. " | |
1585 | "Change all registers?")); | |
1586 | else | |
1587 | n = | |
1588 | query (_("Because GDB is in replay mode, changing the value " | |
1589 | "of a register will make the execution log unusable " | |
1590 | "from this point onward. Change register %s?"), | |
ac7936df | 1591 | gdbarch_register_name (regcache->arch (), |
d02ed0bb MM |
1592 | regno)); |
1593 | ||
1594 | if (!n) | |
1595 | { | |
1596 | /* Invalidate the value of regcache that was set in function | |
dda83cd7 | 1597 | "regcache_raw_write". */ |
d02ed0bb MM |
1598 | if (regno < 0) |
1599 | { | |
1600 | int i; | |
1601 | ||
1602 | for (i = 0; | |
ac7936df | 1603 | i < gdbarch_num_regs (regcache->arch ()); |
d02ed0bb | 1604 | i++) |
6aa7d724 | 1605 | regcache->invalidate (i); |
d02ed0bb MM |
1606 | } |
1607 | else | |
6aa7d724 | 1608 | regcache->invalidate (regno); |
d02ed0bb MM |
1609 | |
1610 | error (_("Process record canceled the operation.")); | |
1611 | } | |
1612 | ||
1613 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1614 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1615 | } |
1616 | ||
88d1aa9d | 1617 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1618 | } |
b6a8c27b | 1619 | this->beneath ()->store_registers (regcache, regno); |
d02ed0bb MM |
1620 | } |
1621 | ||
f6ac5f3d | 1622 | /* "xfer_partial" method. Behavior is conditional on |
88d1aa9d | 1623 | RECORD_FULL_IS_REPLAY. |
d02ed0bb MM |
1624 | In replay mode, we cannot write memory unles we are willing to |
1625 | invalidate the record/replay log from this point forward. */ | |
1626 | ||
f6ac5f3d PA |
1627 | enum target_xfer_status |
1628 | record_full_target::xfer_partial (enum target_object object, | |
1629 | const char *annex, gdb_byte *readbuf, | |
1630 | const gdb_byte *writebuf, ULONGEST offset, | |
1631 | ULONGEST len, ULONGEST *xfered_len) | |
d02ed0bb | 1632 | { |
88d1aa9d | 1633 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1634 | && (object == TARGET_OBJECT_MEMORY |
1635 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1636 | { | |
88d1aa9d | 1637 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1638 | { |
1639 | /* Let user choose if he wants to write memory or not. */ | |
1640 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
dda83cd7 SM |
1641 | "will make the execution log unusable from this " |
1642 | "point onward. Write memory at address %s?"), | |
d02ed0bb MM |
1643 | paddress (target_gdbarch (), offset))) |
1644 | error (_("Process record canceled the operation.")); | |
1645 | ||
1646 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1647 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1648 | } |
1649 | ||
88d1aa9d | 1650 | /* Check record_full_insn_num */ |
651ce16a | 1651 | record_full_check_insn_num (); |
d02ed0bb MM |
1652 | |
1653 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1654 | record_full_arch_list_head = NULL; |
1655 | record_full_arch_list_tail = NULL; | |
25ea693b | 1656 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1657 | { |
88d1aa9d | 1658 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1659 | if (record_debug) |
1660 | fprintf_unfiltered (gdb_stdlog, | |
1661 | "Process record: failed to record " | |
1662 | "execution log."); | |
2ed4b548 | 1663 | return TARGET_XFER_E_IO; |
d02ed0bb | 1664 | } |
25ea693b | 1665 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1666 | { |
88d1aa9d | 1667 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1668 | if (record_debug) |
1669 | fprintf_unfiltered (gdb_stdlog, | |
1670 | "Process record: failed to record " | |
1671 | "execution log."); | |
2ed4b548 | 1672 | return TARGET_XFER_E_IO; |
d02ed0bb | 1673 | } |
88d1aa9d MM |
1674 | record_full_list->next = record_full_arch_list_head; |
1675 | record_full_arch_list_head->prev = record_full_list; | |
1676 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1677 | |
7ee70bf5 | 1678 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1679 | record_full_list_release_first (); |
d02ed0bb | 1680 | else |
88d1aa9d | 1681 | record_full_insn_num++; |
d02ed0bb MM |
1682 | } |
1683 | ||
b6a8c27b PA |
1684 | return this->beneath ()->xfer_partial (object, annex, readbuf, writebuf, |
1685 | offset, len, xfered_len); | |
d02ed0bb MM |
1686 | } |
1687 | ||
1688 | /* This structure represents a breakpoint inserted while the record | |
1689 | target is active. We use this to know when to install/remove | |
1690 | breakpoints in/from the target beneath. For example, a breakpoint | |
1691 | may be inserted while recording, but removed when not replaying nor | |
1692 | recording. In that case, the breakpoint had not been inserted on | |
1693 | the target beneath, so we should not try to remove it there. */ | |
1694 | ||
88d1aa9d | 1695 | struct record_full_breakpoint |
d02ed0bb | 1696 | { |
219605fd TT |
1697 | record_full_breakpoint (struct address_space *address_space_, |
1698 | CORE_ADDR addr_, | |
1699 | bool in_target_beneath_) | |
1700 | : address_space (address_space_), | |
1701 | addr (addr_), | |
1702 | in_target_beneath (in_target_beneath_) | |
1703 | { | |
1704 | } | |
1705 | ||
d02ed0bb MM |
1706 | /* The address and address space the breakpoint was set at. */ |
1707 | struct address_space *address_space; | |
1708 | CORE_ADDR addr; | |
1709 | ||
1710 | /* True when the breakpoint has been also installed in the target | |
1711 | beneath. This will be false for breakpoints set during replay or | |
1712 | when recording. */ | |
219605fd | 1713 | bool in_target_beneath; |
d02ed0bb MM |
1714 | }; |
1715 | ||
d02ed0bb MM |
1716 | /* The list of breakpoints inserted while the record target is |
1717 | active. */ | |
219605fd | 1718 | static std::vector<record_full_breakpoint> record_full_breakpoints; |
d02ed0bb MM |
1719 | |
1720 | static void | |
88d1aa9d | 1721 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1722 | { |
1723 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1724 | return; | |
1725 | ||
1726 | if (loc->inserted) | |
1727 | { | |
219605fd TT |
1728 | record_full_breakpoints.emplace_back |
1729 | (loc->target_info.placed_address_space, | |
1730 | loc->target_info.placed_address, | |
1731 | 1); | |
d02ed0bb MM |
1732 | } |
1733 | } | |
1734 | ||
88d1aa9d | 1735 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1736 | |
1737 | static void | |
88d1aa9d | 1738 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1739 | { |
219605fd | 1740 | record_full_breakpoints.clear (); |
d02ed0bb | 1741 | |
88d1aa9d | 1742 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1743 | } |
1744 | ||
88d1aa9d | 1745 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1746 | insert or remove breakpoints in the real target when replaying, nor |
1747 | when recording. */ | |
1748 | ||
f6ac5f3d PA |
1749 | int |
1750 | record_full_target::insert_breakpoint (struct gdbarch *gdbarch, | |
1751 | struct bp_target_info *bp_tgt) | |
d02ed0bb | 1752 | { |
219605fd | 1753 | bool in_target_beneath = false; |
d02ed0bb | 1754 | |
88d1aa9d | 1755 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1756 | { |
1757 | /* When recording, we currently always single-step, so we don't | |
1758 | really need to install regular breakpoints in the inferior. | |
1759 | However, we do have to insert software single-step | |
1760 | breakpoints, in case the target can't hardware step. To keep | |
f99bd5f2 | 1761 | things simple, we always insert. */ |
d02ed0bb | 1762 | |
07036511 TT |
1763 | scoped_restore restore_operation_disable |
1764 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 1765 | |
b6a8c27b | 1766 | int ret = this->beneath ()->insert_breakpoint (gdbarch, bp_tgt); |
d02ed0bb MM |
1767 | if (ret != 0) |
1768 | return ret; | |
1769 | ||
219605fd | 1770 | in_target_beneath = true; |
d02ed0bb MM |
1771 | } |
1772 | ||
e390720b YQ |
1773 | /* Use the existing entries if found in order to avoid duplication |
1774 | in record_full_breakpoints. */ | |
1775 | ||
19f3f25f | 1776 | for (const record_full_breakpoint &bp : record_full_breakpoints) |
e390720b | 1777 | { |
219605fd TT |
1778 | if (bp.addr == bp_tgt->placed_address |
1779 | && bp.address_space == bp_tgt->placed_address_space) | |
e390720b | 1780 | { |
219605fd | 1781 | gdb_assert (bp.in_target_beneath == in_target_beneath); |
e390720b YQ |
1782 | return 0; |
1783 | } | |
1784 | } | |
1785 | ||
219605fd TT |
1786 | record_full_breakpoints.emplace_back (bp_tgt->placed_address_space, |
1787 | bp_tgt->placed_address, | |
1788 | in_target_beneath); | |
d02ed0bb MM |
1789 | return 0; |
1790 | } | |
1791 | ||
f6ac5f3d | 1792 | /* "remove_breakpoint" method for process record target. */ |
d02ed0bb | 1793 | |
f6ac5f3d PA |
1794 | int |
1795 | record_full_target::remove_breakpoint (struct gdbarch *gdbarch, | |
1796 | struct bp_target_info *bp_tgt, | |
1797 | enum remove_bp_reason reason) | |
d02ed0bb | 1798 | { |
219605fd TT |
1799 | for (auto iter = record_full_breakpoints.begin (); |
1800 | iter != record_full_breakpoints.end (); | |
1801 | ++iter) | |
d02ed0bb | 1802 | { |
219605fd TT |
1803 | struct record_full_breakpoint &bp = *iter; |
1804 | ||
1805 | if (bp.addr == bp_tgt->placed_address | |
1806 | && bp.address_space == bp_tgt->placed_address_space) | |
d02ed0bb | 1807 | { |
219605fd | 1808 | if (bp.in_target_beneath) |
d02ed0bb | 1809 | { |
07036511 TT |
1810 | scoped_restore restore_operation_disable |
1811 | = record_full_gdb_operation_disable_set (); | |
f6ac5f3d | 1812 | |
b6a8c27b PA |
1813 | int ret = this->beneath ()->remove_breakpoint (gdbarch, bp_tgt, |
1814 | reason); | |
d02ed0bb MM |
1815 | if (ret != 0) |
1816 | return ret; | |
1817 | } | |
1818 | ||
01d3dedf | 1819 | if (reason == REMOVE_BREAKPOINT) |
219605fd | 1820 | unordered_remove (record_full_breakpoints, iter); |
d02ed0bb MM |
1821 | return 0; |
1822 | } | |
1823 | } | |
1824 | ||
1825 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1826 | } | |
1827 | ||
f6ac5f3d | 1828 | /* "can_execute_reverse" method for process record target. */ |
d02ed0bb | 1829 | |
57810aa7 | 1830 | bool |
f6ac5f3d | 1831 | record_full_base_target::can_execute_reverse () |
d02ed0bb | 1832 | { |
57810aa7 | 1833 | return true; |
d02ed0bb MM |
1834 | } |
1835 | ||
f6ac5f3d | 1836 | /* "get_bookmark" method for process record and prec over core. */ |
d02ed0bb | 1837 | |
f6ac5f3d PA |
1838 | gdb_byte * |
1839 | record_full_base_target::get_bookmark (const char *args, int from_tty) | |
d02ed0bb | 1840 | { |
0f928d68 | 1841 | char *ret = NULL; |
d02ed0bb MM |
1842 | |
1843 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1844 | if (record_full_list && record_full_list->type == record_full_end) |
1845 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1846 | |
1847 | if (record_debug) | |
1848 | { | |
1849 | if (ret) | |
1850 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1851 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1852 | else |
1853 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1854 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1855 | } |
0f928d68 | 1856 | return (gdb_byte *) ret; |
d02ed0bb MM |
1857 | } |
1858 | ||
f6ac5f3d | 1859 | /* "goto_bookmark" method for process record and prec over core. */ |
d02ed0bb | 1860 | |
f6ac5f3d PA |
1861 | void |
1862 | record_full_base_target::goto_bookmark (const gdb_byte *raw_bookmark, | |
1863 | int from_tty) | |
d02ed0bb | 1864 | { |
c2bcbb1d | 1865 | const char *bookmark = (const char *) raw_bookmark; |
0f928d68 | 1866 | |
d02ed0bb MM |
1867 | if (record_debug) |
1868 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1869 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb | 1870 | |
a2b2bc12 | 1871 | std::string name_holder; |
d02ed0bb MM |
1872 | if (bookmark[0] == '\'' || bookmark[0] == '\"') |
1873 | { | |
1874 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) | |
1875 | error (_("Unbalanced quotes: %s"), bookmark); | |
1876 | ||
a2b2bc12 TT |
1877 | name_holder = std::string (bookmark + 1, strlen (bookmark) - 2); |
1878 | bookmark = name_holder.c_str (); | |
d02ed0bb MM |
1879 | } |
1880 | ||
c2bcbb1d | 1881 | record_goto (bookmark); |
d02ed0bb MM |
1882 | } |
1883 | ||
f6ac5f3d PA |
1884 | enum exec_direction_kind |
1885 | record_full_base_target::execution_direction () | |
d02ed0bb | 1886 | { |
88d1aa9d | 1887 | return record_full_execution_dir; |
d02ed0bb MM |
1888 | } |
1889 | ||
f6ac5f3d | 1890 | /* The record_method method of target record-full. */ |
b158a20f TW |
1891 | |
1892 | enum record_method | |
f6ac5f3d | 1893 | record_full_base_target::record_method (ptid_t ptid) |
b158a20f TW |
1894 | { |
1895 | return RECORD_METHOD_FULL; | |
1896 | } | |
1897 | ||
f6ac5f3d PA |
1898 | void |
1899 | record_full_base_target::info_record () | |
d02ed0bb | 1900 | { |
88d1aa9d | 1901 | struct record_full_entry *p; |
d02ed0bb | 1902 | |
88d1aa9d | 1903 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1904 | printf_filtered (_("Replay mode:\n")); |
1905 | else | |
1906 | printf_filtered (_("Record mode:\n")); | |
1907 | ||
1908 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1909 | for (p = record_full_first.next; |
1910 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1911 | p = p->next) |
1912 | ; | |
1913 | ||
1914 | /* Do we have a log at all? */ | |
88d1aa9d | 1915 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1916 | { |
1917 | /* Display instruction number for first instruction in the log. */ | |
1918 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1919 | pulongest (p->u.end.insn_num)); | |
1920 | ||
1921 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1922 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1923 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1924 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1925 | |
1926 | /* Display instruction number for last instruction in the log. */ | |
1927 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1928 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1929 | |
1930 | /* Display log count. */ | |
7ee70bf5 | 1931 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1932 | record_full_insn_num); |
d02ed0bb MM |
1933 | } |
1934 | else | |
1935 | printf_filtered (_("No instructions have been logged.\n")); | |
1936 | ||
1937 | /* Display max log size. */ | |
7ee70bf5 | 1938 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1939 | record_full_insn_max_num); |
d02ed0bb MM |
1940 | } |
1941 | ||
f6ac5f3d PA |
1942 | bool |
1943 | record_full_base_target::supports_delete_record () | |
1944 | { | |
1945 | return true; | |
1946 | } | |
d02ed0bb | 1947 | |
f6ac5f3d PA |
1948 | /* The "delete_record" target method. */ |
1949 | ||
1950 | void | |
1951 | record_full_base_target::delete_record () | |
d02ed0bb | 1952 | { |
88d1aa9d | 1953 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1954 | } |
1955 | ||
f6ac5f3d | 1956 | /* The "record_is_replaying" target method. */ |
d02ed0bb | 1957 | |
57810aa7 | 1958 | bool |
f6ac5f3d | 1959 | record_full_base_target::record_is_replaying (ptid_t ptid) |
d02ed0bb | 1960 | { |
88d1aa9d | 1961 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1962 | } |
1963 | ||
f6ac5f3d | 1964 | /* The "record_will_replay" target method. */ |
7ff27e9b | 1965 | |
57810aa7 | 1966 | bool |
f6ac5f3d | 1967 | record_full_base_target::record_will_replay (ptid_t ptid, int dir) |
7ff27e9b MM |
1968 | { |
1969 | /* We can currently only record when executing forwards. Should we be able | |
1970 | to record when executing backwards on targets that support reverse | |
1971 | execution, this needs to be changed. */ | |
1972 | ||
1973 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1974 | } | |
1975 | ||
d02ed0bb MM |
1976 | /* Go to a specific entry. */ |
1977 | ||
1978 | static void | |
88d1aa9d | 1979 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1980 | { |
1981 | if (p == NULL) | |
1982 | error (_("Target insn not found.")); | |
88d1aa9d | 1983 | else if (p == record_full_list) |
d02ed0bb | 1984 | error (_("Already at target insn.")); |
88d1aa9d | 1985 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1986 | { |
1987 | printf_filtered (_("Go forward to insn number %s\n"), | |
1988 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1989 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
1990 | } |
1991 | else | |
1992 | { | |
1993 | printf_filtered (_("Go backward to insn number %s\n"), | |
1994 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1995 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
1996 | } |
1997 | ||
1998 | registers_changed (); | |
1999 | reinit_frame_cache (); | |
f2ffa92b PA |
2000 | inferior_thread ()->suspend.stop_pc |
2001 | = regcache_read_pc (get_current_regcache ()); | |
08d72866 | 2002 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2003 | } |
2004 | ||
f6ac5f3d | 2005 | /* The "goto_record_begin" target method. */ |
d02ed0bb | 2006 | |
f6ac5f3d PA |
2007 | void |
2008 | record_full_base_target::goto_record_begin () | |
d02ed0bb | 2009 | { |
88d1aa9d | 2010 | struct record_full_entry *p = NULL; |
d02ed0bb | 2011 | |
88d1aa9d MM |
2012 | for (p = &record_full_first; p != NULL; p = p->next) |
2013 | if (p->type == record_full_end) | |
d02ed0bb MM |
2014 | break; |
2015 | ||
88d1aa9d | 2016 | record_full_goto_entry (p); |
d02ed0bb MM |
2017 | } |
2018 | ||
f6ac5f3d | 2019 | /* The "goto_record_end" target method. */ |
d02ed0bb | 2020 | |
f6ac5f3d PA |
2021 | void |
2022 | record_full_base_target::goto_record_end () | |
d02ed0bb | 2023 | { |
88d1aa9d | 2024 | struct record_full_entry *p = NULL; |
d02ed0bb | 2025 | |
88d1aa9d | 2026 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
2027 | ; |
2028 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 2029 | if (p->type == record_full_end) |
d02ed0bb MM |
2030 | break; |
2031 | ||
88d1aa9d | 2032 | record_full_goto_entry (p); |
d02ed0bb MM |
2033 | } |
2034 | ||
f6ac5f3d | 2035 | /* The "goto_record" target method. */ |
d02ed0bb | 2036 | |
f6ac5f3d PA |
2037 | void |
2038 | record_full_base_target::goto_record (ULONGEST target_insn) | |
d02ed0bb | 2039 | { |
88d1aa9d | 2040 | struct record_full_entry *p = NULL; |
d02ed0bb | 2041 | |
88d1aa9d MM |
2042 | for (p = &record_full_first; p != NULL; p = p->next) |
2043 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
2044 | break; |
2045 | ||
88d1aa9d | 2046 | record_full_goto_entry (p); |
d02ed0bb MM |
2047 | } |
2048 | ||
f6ac5f3d | 2049 | /* The "record_stop_replaying" target method. */ |
797094dd | 2050 | |
f6ac5f3d PA |
2051 | void |
2052 | record_full_base_target::record_stop_replaying () | |
797094dd | 2053 | { |
f6ac5f3d | 2054 | goto_record_end (); |
797094dd MM |
2055 | } |
2056 | ||
f6ac5f3d | 2057 | /* "resume" method for prec over corefile. */ |
d02ed0bb | 2058 | |
f6ac5f3d PA |
2059 | void |
2060 | record_full_core_target::resume (ptid_t ptid, int step, | |
2061 | enum gdb_signal signal) | |
d02ed0bb | 2062 | { |
88d1aa9d MM |
2063 | record_full_resume_step = step; |
2064 | record_full_resumed = 1; | |
f6ac5f3d | 2065 | record_full_execution_dir = ::execution_direction; |
d02ed0bb MM |
2066 | |
2067 | /* We are about to start executing the inferior (or simulate it), | |
2068 | let's register it with the event loop. */ | |
2069 | if (target_can_async_p ()) | |
6a3753b3 | 2070 | target_async (1); |
d02ed0bb MM |
2071 | } |
2072 | ||
f6ac5f3d | 2073 | /* "kill" method for prec over corefile. */ |
d02ed0bb | 2074 | |
f6ac5f3d PA |
2075 | void |
2076 | record_full_core_target::kill () | |
d02ed0bb MM |
2077 | { |
2078 | if (record_debug) | |
88d1aa9d | 2079 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2080 | |
fadf6add | 2081 | current_inferior ()->unpush_target (this); |
d02ed0bb MM |
2082 | } |
2083 | ||
f6ac5f3d | 2084 | /* "fetch_registers" method for prec over corefile. */ |
d02ed0bb | 2085 | |
f6ac5f3d PA |
2086 | void |
2087 | record_full_core_target::fetch_registers (struct regcache *regcache, | |
2088 | int regno) | |
d02ed0bb MM |
2089 | { |
2090 | if (regno < 0) | |
2091 | { | |
ac7936df | 2092 | int num = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
2093 | int i; |
2094 | ||
2095 | for (i = 0; i < num; i ++) | |
c8ec2f33 | 2096 | regcache->raw_supply (i, *record_full_core_regbuf); |
d02ed0bb MM |
2097 | } |
2098 | else | |
c8ec2f33 | 2099 | regcache->raw_supply (regno, *record_full_core_regbuf); |
d02ed0bb MM |
2100 | } |
2101 | ||
f6ac5f3d | 2102 | /* "prepare_to_store" method for prec over corefile. */ |
d02ed0bb | 2103 | |
f6ac5f3d PA |
2104 | void |
2105 | record_full_core_target::prepare_to_store (struct regcache *regcache) | |
d02ed0bb MM |
2106 | { |
2107 | } | |
2108 | ||
f6ac5f3d | 2109 | /* "store_registers" method for prec over corefile. */ |
d02ed0bb | 2110 | |
f6ac5f3d PA |
2111 | void |
2112 | record_full_core_target::store_registers (struct regcache *regcache, | |
2113 | int regno) | |
d02ed0bb | 2114 | { |
88d1aa9d | 2115 | if (record_full_gdb_operation_disable) |
c8ec2f33 | 2116 | record_full_core_regbuf->raw_supply (regno, *regcache); |
d02ed0bb MM |
2117 | else |
2118 | error (_("You can't do that without a process to debug.")); | |
2119 | } | |
2120 | ||
f6ac5f3d | 2121 | /* "xfer_partial" method for prec over corefile. */ |
d02ed0bb | 2122 | |
f6ac5f3d PA |
2123 | enum target_xfer_status |
2124 | record_full_core_target::xfer_partial (enum target_object object, | |
2125 | const char *annex, gdb_byte *readbuf, | |
2126 | const gdb_byte *writebuf, ULONGEST offset, | |
2127 | ULONGEST len, ULONGEST *xfered_len) | |
d02ed0bb MM |
2128 | { |
2129 | if (object == TARGET_OBJECT_MEMORY) | |
2130 | { | |
88d1aa9d | 2131 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb | 2132 | { |
d7a78e5c | 2133 | for (target_section &p : record_full_core_sections) |
d02ed0bb | 2134 | { |
bb2a6777 | 2135 | if (offset >= p.addr) |
d02ed0bb | 2136 | { |
88d1aa9d | 2137 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2138 | ULONGEST sec_offset; |
2139 | ||
bb2a6777 | 2140 | if (offset >= p.endaddr) |
d02ed0bb MM |
2141 | continue; |
2142 | ||
bb2a6777 TT |
2143 | if (offset + len > p.endaddr) |
2144 | len = p.endaddr - offset; | |
d02ed0bb | 2145 | |
bb2a6777 | 2146 | sec_offset = offset - p.addr; |
d02ed0bb MM |
2147 | |
2148 | /* Read readbuf or write writebuf p, offset, len. */ | |
2149 | /* Check flags. */ | |
bb2a6777 TT |
2150 | if (p.the_bfd_section->flags & SEC_CONSTRUCTOR |
2151 | || (p.the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
d02ed0bb MM |
2152 | { |
2153 | if (readbuf) | |
2154 | memset (readbuf, 0, len); | |
9b409511 YQ |
2155 | |
2156 | *xfered_len = len; | |
2157 | return TARGET_XFER_OK; | |
d02ed0bb | 2158 | } |
88d1aa9d MM |
2159 | /* Get record_full_core_buf_entry. */ |
2160 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb | 2161 | entry = entry->prev) |
bb2a6777 | 2162 | if (entry->p == &p) |
d02ed0bb MM |
2163 | break; |
2164 | if (writebuf) | |
2165 | { | |
2166 | if (!entry) | |
2167 | { | |
2168 | /* Add a new entry. */ | |
8d749320 | 2169 | entry = XNEW (struct record_full_core_buf_entry); |
bb2a6777 | 2170 | entry->p = &p; |
2b2848e2 | 2171 | if (!bfd_malloc_and_get_section |
dda83cd7 | 2172 | (p.the_bfd_section->owner, |
bb2a6777 | 2173 | p.the_bfd_section, |
2b2848e2 | 2174 | &entry->buf)) |
d02ed0bb MM |
2175 | { |
2176 | xfree (entry); | |
9b409511 | 2177 | return TARGET_XFER_EOF; |
d02ed0bb | 2178 | } |
88d1aa9d MM |
2179 | entry->prev = record_full_core_buf_list; |
2180 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2181 | } |
2182 | ||
2183 | memcpy (entry->buf + sec_offset, writebuf, | |
2184 | (size_t) len); | |
2185 | } | |
2186 | else | |
2187 | { | |
2188 | if (!entry) | |
b6a8c27b PA |
2189 | return this->beneath ()->xfer_partial (object, annex, |
2190 | readbuf, writebuf, | |
2191 | offset, len, | |
2192 | xfered_len); | |
d02ed0bb MM |
2193 | |
2194 | memcpy (readbuf, entry->buf + sec_offset, | |
2195 | (size_t) len); | |
2196 | } | |
2197 | ||
9b409511 YQ |
2198 | *xfered_len = len; |
2199 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2200 | } |
2201 | } | |
2202 | ||
2ed4b548 | 2203 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2204 | } |
2205 | else | |
2206 | error (_("You can't do that without a process to debug.")); | |
2207 | } | |
2208 | ||
b6a8c27b PA |
2209 | return this->beneath ()->xfer_partial (object, annex, |
2210 | readbuf, writebuf, offset, len, | |
2211 | xfered_len); | |
d02ed0bb MM |
2212 | } |
2213 | ||
f6ac5f3d | 2214 | /* "insert_breakpoint" method for prec over corefile. */ |
d02ed0bb | 2215 | |
f6ac5f3d PA |
2216 | int |
2217 | record_full_core_target::insert_breakpoint (struct gdbarch *gdbarch, | |
2218 | struct bp_target_info *bp_tgt) | |
d02ed0bb MM |
2219 | { |
2220 | return 0; | |
2221 | } | |
2222 | ||
f6ac5f3d | 2223 | /* "remove_breakpoint" method for prec over corefile. */ |
d02ed0bb | 2224 | |
f6ac5f3d PA |
2225 | int |
2226 | record_full_core_target::remove_breakpoint (struct gdbarch *gdbarch, | |
2227 | struct bp_target_info *bp_tgt, | |
2228 | enum remove_bp_reason reason) | |
d02ed0bb MM |
2229 | { |
2230 | return 0; | |
2231 | } | |
2232 | ||
f6ac5f3d | 2233 | /* "has_execution" method for prec over corefile. */ |
d02ed0bb | 2234 | |
57810aa7 | 2235 | bool |
5018ce90 | 2236 | record_full_core_target::has_execution (inferior *inf) |
d02ed0bb | 2237 | { |
57810aa7 | 2238 | return true; |
d02ed0bb MM |
2239 | } |
2240 | ||
d02ed0bb MM |
2241 | /* Record log save-file format |
2242 | Version 1 (never released) | |
2243 | ||
2244 | Header: | |
2245 | 4 bytes: magic number htonl(0x20090829). | |
2246 | NOTE: be sure to change whenever this file format changes! | |
2247 | ||
2248 | Records: | |
88d1aa9d MM |
2249 | record_full_end: |
2250 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2251 | record_full_reg: | |
2252 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2253 | 8 bytes: register id (network byte order). |
2254 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2255 | record_full_mem: |
2256 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2257 | 8 bytes: memory length (network byte order). |
2258 | 8 bytes: memory address (network byte order). | |
2259 | n bytes: memory value (n == memory length). | |
2260 | ||
2261 | Version 2 | |
2262 | 4 bytes: magic number netorder32(0x20091016). | |
2263 | NOTE: be sure to change whenever this file format changes! | |
2264 | ||
2265 | Records: | |
88d1aa9d MM |
2266 | record_full_end: |
2267 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2268 | 4 bytes: signal |
2269 | 4 bytes: instruction count | |
88d1aa9d MM |
2270 | record_full_reg: |
2271 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2272 | 4 bytes: register id (network byte order). |
2273 | n bytes: register value (n == actual register size). | |
dda83cd7 | 2274 | (eg. 4 bytes for x86 general registers). |
88d1aa9d MM |
2275 | record_full_mem: |
2276 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2277 | 4 bytes: memory length (network byte order). |
2278 | 8 bytes: memory address (network byte order). | |
2279 | n bytes: memory value (n == memory length). | |
2280 | ||
2281 | */ | |
2282 | ||
2283 | /* bfdcore_read -- read bytes from a core file section. */ | |
2284 | ||
2285 | static inline void | |
2286 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2287 | { | |
2288 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2289 | ||
2290 | if (ret) | |
2291 | *offset += len; | |
2292 | else | |
2293 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2294 | len, bfd_get_filename (obfd), | |
2295 | bfd_errmsg (bfd_get_error ())); | |
2296 | } | |
2297 | ||
2298 | static inline uint64_t | |
2299 | netorder64 (uint64_t input) | |
2300 | { | |
2301 | uint64_t ret; | |
2302 | ||
2303 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2304 | BFD_ENDIAN_BIG, input); | |
2305 | return ret; | |
2306 | } | |
2307 | ||
2308 | static inline uint32_t | |
2309 | netorder32 (uint32_t input) | |
2310 | { | |
2311 | uint32_t ret; | |
2312 | ||
d02ed0bb MM |
2313 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), |
2314 | BFD_ENDIAN_BIG, input); | |
2315 | return ret; | |
2316 | } | |
2317 | ||
2318 | /* Restore the execution log from a core_bfd file. */ | |
2319 | static void | |
88d1aa9d | 2320 | record_full_restore (void) |
d02ed0bb MM |
2321 | { |
2322 | uint32_t magic; | |
88d1aa9d | 2323 | struct record_full_entry *rec; |
d02ed0bb MM |
2324 | asection *osec; |
2325 | uint32_t osec_size; | |
2326 | int bfd_offset = 0; | |
2327 | struct regcache *regcache; | |
2328 | ||
2329 | /* We restore the execution log from the open core bfd, | |
2330 | if there is one. */ | |
2331 | if (core_bfd == NULL) | |
2332 | return; | |
2333 | ||
88d1aa9d MM |
2334 | /* "record_full_restore" can only be called when record list is empty. */ |
2335 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2336 | |
2337 | if (record_debug) | |
2338 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2339 | ||
2340 | /* Now need to find our special note section. */ | |
2341 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2342 | if (record_debug) | |
2343 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2344 | osec ? "succeeded" : "failed"); | |
2345 | if (osec == NULL) | |
2346 | return; | |
fd361982 | 2347 | osec_size = bfd_section_size (osec); |
d02ed0bb | 2348 | if (record_debug) |
fd361982 | 2349 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (osec)); |
d02ed0bb MM |
2350 | |
2351 | /* Check the magic code. */ | |
2352 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2353 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2354 | error (_("Version mis-match or file format error in core file %s."), |
2355 | bfd_get_filename (core_bfd)); | |
2356 | if (record_debug) | |
2357 | fprintf_unfiltered (gdb_stdlog, | |
2358 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2359 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2360 | phex_nz (netorder32 (magic), 4)); |
2361 | ||
88d1aa9d MM |
2362 | /* Restore the entries in recfd into record_full_arch_list_head and |
2363 | record_full_arch_list_tail. */ | |
2364 | record_full_arch_list_head = NULL; | |
2365 | record_full_arch_list_tail = NULL; | |
2366 | record_full_insn_num = 0; | |
d02ed0bb | 2367 | |
a70b8144 | 2368 | try |
d02ed0bb | 2369 | { |
1ddbba9d TT |
2370 | regcache = get_current_regcache (); |
2371 | ||
2372 | while (1) | |
2373 | { | |
2374 | uint8_t rectype; | |
2375 | uint32_t regnum, len, signal, count; | |
2376 | uint64_t addr; | |
d02ed0bb | 2377 | |
1ddbba9d TT |
2378 | /* We are finished when offset reaches osec_size. */ |
2379 | if (bfd_offset >= osec_size) | |
2380 | break; | |
2381 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
d02ed0bb | 2382 | |
1ddbba9d TT |
2383 | switch (rectype) |
2384 | { | |
2385 | case record_full_reg: /* reg */ | |
2386 | /* Get register number to regnum. */ | |
2387 | bfdcore_read (core_bfd, osec, ®num, | |
2388 | sizeof (regnum), &bfd_offset); | |
2389 | regnum = netorder32 (regnum); | |
d02ed0bb | 2390 | |
1ddbba9d | 2391 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 2392 | |
1ddbba9d TT |
2393 | /* Get val. */ |
2394 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), | |
2395 | rec->u.reg.len, &bfd_offset); | |
d02ed0bb | 2396 | |
1ddbba9d TT |
2397 | if (record_debug) |
2398 | fprintf_unfiltered (gdb_stdlog, | |
2399 | " Reading register %d (1 " | |
2400 | "plus %lu plus %d bytes)\n", | |
2401 | rec->u.reg.num, | |
2402 | (unsigned long) sizeof (regnum), | |
2403 | rec->u.reg.len); | |
2404 | break; | |
d02ed0bb | 2405 | |
1ddbba9d TT |
2406 | case record_full_mem: /* mem */ |
2407 | /* Get len. */ | |
2408 | bfdcore_read (core_bfd, osec, &len, | |
2409 | sizeof (len), &bfd_offset); | |
2410 | len = netorder32 (len); | |
d02ed0bb | 2411 | |
1ddbba9d TT |
2412 | /* Get addr. */ |
2413 | bfdcore_read (core_bfd, osec, &addr, | |
2414 | sizeof (addr), &bfd_offset); | |
2415 | addr = netorder64 (addr); | |
2416 | ||
2417 | rec = record_full_mem_alloc (addr, len); | |
2418 | ||
2419 | /* Get val. */ | |
2420 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), | |
2421 | rec->u.mem.len, &bfd_offset); | |
2422 | ||
2423 | if (record_debug) | |
2424 | fprintf_unfiltered (gdb_stdlog, | |
2425 | " Reading memory %s (1 plus " | |
2426 | "%lu plus %lu plus %d bytes)\n", | |
2427 | paddress (get_current_arch (), | |
2428 | rec->u.mem.addr), | |
2429 | (unsigned long) sizeof (addr), | |
2430 | (unsigned long) sizeof (len), | |
2431 | rec->u.mem.len); | |
2432 | break; | |
2433 | ||
2434 | case record_full_end: /* end */ | |
2435 | rec = record_full_end_alloc (); | |
2436 | record_full_insn_num ++; | |
2437 | ||
2438 | /* Get signal value. */ | |
2439 | bfdcore_read (core_bfd, osec, &signal, | |
2440 | sizeof (signal), &bfd_offset); | |
2441 | signal = netorder32 (signal); | |
2442 | rec->u.end.sigval = (enum gdb_signal) signal; | |
2443 | ||
2444 | /* Get insn count. */ | |
2445 | bfdcore_read (core_bfd, osec, &count, | |
2446 | sizeof (count), &bfd_offset); | |
2447 | count = netorder32 (count); | |
2448 | rec->u.end.insn_num = count; | |
2449 | record_full_insn_count = count + 1; | |
2450 | if (record_debug) | |
2451 | fprintf_unfiltered (gdb_stdlog, | |
2452 | " Reading record_full_end (1 + " | |
2453 | "%lu + %lu bytes), offset == %s\n", | |
2454 | (unsigned long) sizeof (signal), | |
2455 | (unsigned long) sizeof (count), | |
2456 | paddress (get_current_arch (), | |
2457 | bfd_offset)); | |
2458 | break; | |
2459 | ||
2460 | default: | |
2461 | error (_("Bad entry type in core file %s."), | |
2462 | bfd_get_filename (core_bfd)); | |
2463 | break; | |
2464 | } | |
d02ed0bb | 2465 | |
1ddbba9d TT |
2466 | /* Add rec to record arch list. */ |
2467 | record_full_arch_list_add (rec); | |
2468 | } | |
2469 | } | |
230d2906 | 2470 | catch (const gdb_exception &ex) |
1ddbba9d TT |
2471 | { |
2472 | record_full_list_release (record_full_arch_list_tail); | |
eedc3f4f | 2473 | throw; |
1ddbba9d | 2474 | } |
d02ed0bb | 2475 | |
88d1aa9d MM |
2476 | /* Add record_full_arch_list_head to the end of record list. */ |
2477 | record_full_first.next = record_full_arch_list_head; | |
2478 | record_full_arch_list_head->prev = &record_full_first; | |
2479 | record_full_arch_list_tail->next = NULL; | |
2480 | record_full_list = &record_full_first; | |
d02ed0bb | 2481 | |
88d1aa9d MM |
2482 | /* Update record_full_insn_max_num. */ |
2483 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2484 | { |
88d1aa9d | 2485 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2486 | warning (_("Auto increase record/replay buffer limit to %u."), |
dda83cd7 | 2487 | record_full_insn_max_num); |
d02ed0bb MM |
2488 | } |
2489 | ||
2490 | /* Succeeded. */ | |
2491 | printf_filtered (_("Restored records from core file %s.\n"), | |
2492 | bfd_get_filename (core_bfd)); | |
2493 | ||
08d72866 | 2494 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2495 | } |
2496 | ||
2497 | /* bfdcore_write -- write bytes into a core file section. */ | |
2498 | ||
2499 | static inline void | |
2500 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2501 | { | |
2502 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2503 | ||
2504 | if (ret) | |
2505 | *offset += len; | |
2506 | else | |
2507 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2508 | len, bfd_get_filename (obfd), | |
2509 | bfd_errmsg (bfd_get_error ())); | |
2510 | } | |
2511 | ||
2512 | /* Restore the execution log from a file. We use a modified elf | |
2513 | corefile format, with an extra section for our data. */ | |
2514 | ||
2515 | static void | |
41243651 | 2516 | cmd_record_full_restore (const char *args, int from_tty) |
d02ed0bb MM |
2517 | { |
2518 | core_file_command (args, from_tty); | |
d9f719f1 | 2519 | record_full_open (args, from_tty); |
d02ed0bb MM |
2520 | } |
2521 | ||
d02ed0bb MM |
2522 | /* Save the execution log to a file. We use a modified elf corefile |
2523 | format, with an extra section for our data. */ | |
2524 | ||
f6ac5f3d PA |
2525 | void |
2526 | record_full_base_target::save_record (const char *recfilename) | |
d02ed0bb | 2527 | { |
88d1aa9d | 2528 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2529 | uint32_t magic; |
2530 | struct regcache *regcache; | |
2531 | struct gdbarch *gdbarch; | |
d02ed0bb MM |
2532 | int save_size = 0; |
2533 | asection *osec = NULL; | |
2534 | int bfd_offset = 0; | |
2535 | ||
2536 | /* Open the save file. */ | |
2537 | if (record_debug) | |
2538 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2539 | recfilename); | |
2540 | ||
2541 | /* Open the output file. */ | |
bef155c3 TT |
2542 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (recfilename)); |
2543 | ||
2544 | /* Arrange to remove the output file on failure. */ | |
2545 | gdb::unlinker unlink_file (recfilename); | |
d02ed0bb | 2546 | |
88d1aa9d MM |
2547 | /* Save the current record entry to "cur_record_full_list". */ |
2548 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2549 | |
2550 | /* Get the values of regcache and gdbarch. */ | |
2551 | regcache = get_current_regcache (); | |
ac7936df | 2552 | gdbarch = regcache->arch (); |
d02ed0bb MM |
2553 | |
2554 | /* Disable the GDB operation record. */ | |
07036511 TT |
2555 | scoped_restore restore_operation_disable |
2556 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
2557 | |
2558 | /* Reverse execute to the begin of record list. */ | |
2559 | while (1) | |
2560 | { | |
2561 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2562 | if (record_full_list == &record_full_first) |
dda83cd7 | 2563 | break; |
d02ed0bb | 2564 | |
88d1aa9d | 2565 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2566 | |
88d1aa9d | 2567 | if (record_full_list->prev) |
dda83cd7 | 2568 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
2569 | } |
2570 | ||
2571 | /* Compute the size needed for the extra bfd section. */ | |
2572 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2573 | for (record_full_list = record_full_first.next; record_full_list; |
2574 | record_full_list = record_full_list->next) | |
2575 | switch (record_full_list->type) | |
d02ed0bb | 2576 | { |
88d1aa9d | 2577 | case record_full_end: |
d02ed0bb MM |
2578 | save_size += 1 + 4 + 4; |
2579 | break; | |
88d1aa9d MM |
2580 | case record_full_reg: |
2581 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2582 | break; |
88d1aa9d MM |
2583 | case record_full_mem: |
2584 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2585 | break; |
2586 | } | |
2587 | ||
2588 | /* Make the new bfd section. */ | |
bef155c3 | 2589 | osec = bfd_make_section_anyway_with_flags (obfd.get (), "precord", |
dda83cd7 SM |
2590 | SEC_HAS_CONTENTS |
2591 | | SEC_READONLY); | |
d02ed0bb MM |
2592 | if (osec == NULL) |
2593 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2594 | recfilename, | |
dda83cd7 | 2595 | bfd_errmsg (bfd_get_error ())); |
fd361982 AM |
2596 | bfd_set_section_size (osec, save_size); |
2597 | bfd_set_section_vma (osec, 0); | |
2598 | bfd_set_section_alignment (osec, 0); | |
d02ed0bb MM |
2599 | |
2600 | /* Save corefile state. */ | |
bef155c3 | 2601 | write_gcore_file (obfd.get ()); |
d02ed0bb MM |
2602 | |
2603 | /* Write out the record log. */ | |
2604 | /* Write the magic code. */ | |
88d1aa9d | 2605 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2606 | if (record_debug) |
2607 | fprintf_unfiltered (gdb_stdlog, | |
2608 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2609 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb | 2610 | phex_nz (magic, 4)); |
bef155c3 | 2611 | bfdcore_write (obfd.get (), osec, &magic, sizeof (magic), &bfd_offset); |
d02ed0bb MM |
2612 | |
2613 | /* Save the entries to recfd and forward execute to the end of | |
2614 | record list. */ | |
88d1aa9d | 2615 | record_full_list = &record_full_first; |
d02ed0bb MM |
2616 | while (1) |
2617 | { | |
2618 | /* Save entry. */ | |
88d1aa9d | 2619 | if (record_full_list != &record_full_first) |
dda83cd7 | 2620 | { |
d02ed0bb MM |
2621 | uint8_t type; |
2622 | uint32_t regnum, len, signal, count; | |
dda83cd7 | 2623 | uint64_t addr; |
d02ed0bb | 2624 | |
88d1aa9d | 2625 | type = record_full_list->type; |
dda83cd7 | 2626 | bfdcore_write (obfd.get (), osec, &type, sizeof (type), &bfd_offset); |
d02ed0bb | 2627 | |
dda83cd7 SM |
2628 | switch (record_full_list->type) |
2629 | { | |
2630 | case record_full_reg: /* reg */ | |
d02ed0bb MM |
2631 | if (record_debug) |
2632 | fprintf_unfiltered (gdb_stdlog, | |
2633 | " Writing register %d (1 " | |
2634 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2635 | record_full_list->u.reg.num, |
d02ed0bb | 2636 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2637 | record_full_list->u.reg.len); |
d02ed0bb | 2638 | |
dda83cd7 SM |
2639 | /* Write regnum. */ |
2640 | regnum = netorder32 (record_full_list->u.reg.num); | |
2641 | bfdcore_write (obfd.get (), osec, ®num, | |
d02ed0bb MM |
2642 | sizeof (regnum), &bfd_offset); |
2643 | ||
dda83cd7 SM |
2644 | /* Write regval. */ |
2645 | bfdcore_write (obfd.get (), osec, | |
88d1aa9d MM |
2646 | record_full_get_loc (record_full_list), |
2647 | record_full_list->u.reg.len, &bfd_offset); | |
dda83cd7 | 2648 | break; |
d02ed0bb | 2649 | |
dda83cd7 | 2650 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2651 | if (record_debug) |
2652 | fprintf_unfiltered (gdb_stdlog, | |
2653 | " Writing memory %s (1 plus " | |
2654 | "%lu plus %lu plus %d bytes)\n", | |
2655 | paddress (gdbarch, | |
88d1aa9d | 2656 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2657 | (unsigned long) sizeof (addr), |
2658 | (unsigned long) sizeof (len), | |
88d1aa9d | 2659 | record_full_list->u.mem.len); |
d02ed0bb MM |
2660 | |
2661 | /* Write memlen. */ | |
88d1aa9d | 2662 | len = netorder32 (record_full_list->u.mem.len); |
bef155c3 TT |
2663 | bfdcore_write (obfd.get (), osec, &len, sizeof (len), |
2664 | &bfd_offset); | |
d02ed0bb MM |
2665 | |
2666 | /* Write memaddr. */ | |
88d1aa9d | 2667 | addr = netorder64 (record_full_list->u.mem.addr); |
bef155c3 | 2668 | bfdcore_write (obfd.get (), osec, &addr, |
d02ed0bb MM |
2669 | sizeof (addr), &bfd_offset); |
2670 | ||
2671 | /* Write memval. */ | |
bef155c3 | 2672 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2673 | record_full_get_loc (record_full_list), |
2674 | record_full_list->u.mem.len, &bfd_offset); | |
dda83cd7 | 2675 | break; |
d02ed0bb | 2676 | |
dda83cd7 | 2677 | case record_full_end: |
d02ed0bb MM |
2678 | if (record_debug) |
2679 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2680 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2681 | "%lu + %lu bytes)\n", |
2682 | (unsigned long) sizeof (signal), | |
2683 | (unsigned long) sizeof (count)); | |
2684 | /* Write signal value. */ | |
88d1aa9d | 2685 | signal = netorder32 (record_full_list->u.end.sigval); |
bef155c3 | 2686 | bfdcore_write (obfd.get (), osec, &signal, |
d02ed0bb MM |
2687 | sizeof (signal), &bfd_offset); |
2688 | ||
2689 | /* Write insn count. */ | |
88d1aa9d | 2690 | count = netorder32 (record_full_list->u.end.insn_num); |
bef155c3 | 2691 | bfdcore_write (obfd.get (), osec, &count, |
d02ed0bb | 2692 | sizeof (count), &bfd_offset); |
dda83cd7 SM |
2693 | break; |
2694 | } | |
2695 | } | |
d02ed0bb MM |
2696 | |
2697 | /* Execute entry. */ | |
88d1aa9d | 2698 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2699 | |
88d1aa9d | 2700 | if (record_full_list->next) |
dda83cd7 | 2701 | record_full_list = record_full_list->next; |
d02ed0bb | 2702 | else |
dda83cd7 | 2703 | break; |
d02ed0bb MM |
2704 | } |
2705 | ||
88d1aa9d | 2706 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2707 | while (1) |
2708 | { | |
2709 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2710 | if (record_full_list == cur_record_full_list) |
dda83cd7 | 2711 | break; |
d02ed0bb | 2712 | |
88d1aa9d | 2713 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2714 | |
88d1aa9d | 2715 | if (record_full_list->prev) |
dda83cd7 | 2716 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
2717 | } |
2718 | ||
bef155c3 | 2719 | unlink_file.keep (); |
d02ed0bb MM |
2720 | |
2721 | /* Succeeded. */ | |
2722 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2723 | recfilename); | |
2724 | } | |
2725 | ||
88d1aa9d | 2726 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2727 | depending on DIR) to the given entry, changing the program state |
2728 | correspondingly. */ | |
2729 | ||
2730 | static void | |
88d1aa9d MM |
2731 | record_full_goto_insn (struct record_full_entry *entry, |
2732 | enum exec_direction_kind dir) | |
d02ed0bb | 2733 | { |
07036511 TT |
2734 | scoped_restore restore_operation_disable |
2735 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 2736 | struct regcache *regcache = get_current_regcache (); |
ac7936df | 2737 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb MM |
2738 | |
2739 | /* Assume everything is valid: we will hit the entry, | |
2740 | and we will not hit the end of the recording. */ | |
2741 | ||
2742 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2743 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2744 | |
2745 | do | |
2746 | { | |
88d1aa9d | 2747 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2748 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2749 | record_full_list = record_full_list->prev; |
d02ed0bb | 2750 | else |
88d1aa9d MM |
2751 | record_full_list = record_full_list->next; |
2752 | } while (record_full_list != entry); | |
d02ed0bb MM |
2753 | } |
2754 | ||
2755 | /* Alias for "target record-full". */ | |
2756 | ||
2757 | static void | |
981a3fb3 | 2758 | cmd_record_full_start (const char *args, int from_tty) |
d02ed0bb | 2759 | { |
95a6b0a1 | 2760 | execute_command ("target record-full", from_tty); |
d02ed0bb MM |
2761 | } |
2762 | ||
2763 | static void | |
eb4c3f4a | 2764 | set_record_full_insn_max_num (const char *args, int from_tty, |
88d1aa9d | 2765 | struct cmd_list_element *c) |
d02ed0bb | 2766 | { |
7ee70bf5 | 2767 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2768 | { |
88d1aa9d MM |
2769 | /* Count down record_full_insn_num while releasing records from list. */ |
2770 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2771 | { |
dda83cd7 SM |
2772 | record_full_list_release_first (); |
2773 | record_full_insn_num--; | |
d02ed0bb MM |
2774 | } |
2775 | } | |
2776 | } | |
2777 | ||
6c265988 | 2778 | void _initialize_record_full (); |
d02ed0bb | 2779 | void |
6c265988 | 2780 | _initialize_record_full () |
d02ed0bb MM |
2781 | { |
2782 | struct cmd_list_element *c; | |
2783 | ||
88d1aa9d MM |
2784 | /* Init record_full_first. */ |
2785 | record_full_first.prev = NULL; | |
2786 | record_full_first.next = NULL; | |
2787 | record_full_first.type = record_full_end; | |
d02ed0bb | 2788 | |
d9f719f1 PA |
2789 | add_target (record_full_target_info, record_full_open); |
2790 | add_deprecated_target_alias (record_full_target_info, "record"); | |
2791 | add_target (record_full_core_target_info, record_full_open); | |
d02ed0bb | 2792 | |
88d1aa9d | 2793 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb MM |
2794 | _("Start full execution recording."), &record_full_cmdlist, |
2795 | "record full ", 0, &record_cmdlist); | |
2796 | ||
88d1aa9d | 2797 | c = add_cmd ("restore", class_obscure, cmd_record_full_restore, |
d02ed0bb MM |
2798 | _("Restore the execution log from a file.\n\ |
2799 | Argument is filename. File must be created with 'record save'."), | |
2800 | &record_full_cmdlist); | |
2801 | set_cmd_completer (c, filename_completer); | |
2802 | ||
2803 | /* Deprecate the old version without "full" prefix. */ | |
2804 | c = add_alias_cmd ("restore", "full restore", class_obscure, 1, | |
2805 | &record_cmdlist); | |
2806 | set_cmd_completer (c, filename_completer); | |
2807 | deprecate_cmd (c, "record full restore"); | |
2808 | ||
0743fc83 TT |
2809 | add_basic_prefix_cmd ("full", class_support, |
2810 | _("Set record options."), &set_record_full_cmdlist, | |
2811 | "set record full ", 0, &set_record_cmdlist); | |
d02ed0bb | 2812 | |
0743fc83 TT |
2813 | add_show_prefix_cmd ("full", class_support, |
2814 | _("Show record options."), &show_record_full_cmdlist, | |
2815 | "show record full ", 0, &show_record_cmdlist); | |
d02ed0bb MM |
2816 | |
2817 | /* Record instructions number limit command. */ | |
2818 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
88d1aa9d | 2819 | &record_full_stop_at_limit, _("\ |
d02ed0bb MM |
2820 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2821 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2822 | _("Default is ON.\n\ | |
2823 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2824 | When OFF, if the record/replay buffer becomes full,\n\ | |
2825 | delete the oldest recorded instruction to make room for each new one."), | |
2826 | NULL, NULL, | |
2827 | &set_record_full_cmdlist, &show_record_full_cmdlist); | |
2828 | ||
2829 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2830 | &set_record_cmdlist); | |
2831 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2832 | ||
2833 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2834 | &show_record_cmdlist); | |
2835 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2836 | ||
88d1aa9d MM |
2837 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
2838 | &record_full_insn_max_num, | |
d02ed0bb MM |
2839 | _("Set record/replay buffer limit."), |
2840 | _("Show record/replay buffer limit."), _("\ | |
2841 | Set the maximum number of instructions to be stored in the\n\ | |
f81d1120 PA |
2842 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2843 | limit. Default is 200000."), | |
88d1aa9d | 2844 | set_record_full_insn_max_num, |
d02ed0bb MM |
2845 | NULL, &set_record_full_cmdlist, |
2846 | &show_record_full_cmdlist); | |
2847 | ||
2848 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2849 | &set_record_cmdlist); | |
2850 | deprecate_cmd (c, "set record full insn-number-max"); | |
2851 | ||
2852 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2853 | &show_record_cmdlist); | |
2854 | deprecate_cmd (c, "show record full insn-number-max"); | |
2855 | ||
88d1aa9d | 2856 | add_setshow_boolean_cmd ("memory-query", no_class, |
25ea693b | 2857 | &record_full_memory_query, _("\ |
d02ed0bb | 2858 | Set whether query if PREC cannot record memory change of next instruction."), |
dda83cd7 | 2859 | _("\ |
d02ed0bb | 2860 | Show whether query if PREC cannot record memory change of next instruction."), |
dda83cd7 | 2861 | _("\ |
d02ed0bb MM |
2862 | Default is OFF.\n\ |
2863 | When ON, query if PREC cannot record memory change of next instruction."), | |
2864 | NULL, NULL, | |
88d1aa9d MM |
2865 | &set_record_full_cmdlist, |
2866 | &show_record_full_cmdlist); | |
d02ed0bb MM |
2867 | |
2868 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2869 | &set_record_cmdlist); | |
2870 | deprecate_cmd (c, "set record full memory-query"); | |
2871 | ||
2872 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2873 | &show_record_cmdlist); | |
2874 | deprecate_cmd (c, "show record full memory-query"); | |
2875 | } |