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d02ed0bb MM |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
88b9d363 | 3 | Copyright (C) 2013-2022 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)) | |
24b21115 | 1239 | { |
dda83cd7 SM |
1240 | status->kind = TARGET_WAITKIND_STOPPED; |
1241 | status->value.sig = GDB_SIGNAL_0; | |
1242 | break; | |
24b21115 | 1243 | } |
d02ed0bb | 1244 | |
1192f124 SM |
1245 | process_stratum_target *proc_target |
1246 | = current_inferior ()->process_target (); | |
1247 | ||
dda83cd7 | 1248 | if (gdbarch_software_single_step_p (gdbarch)) |
d02ed0bb MM |
1249 | { |
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 | 1265 | ops->beneath ()->resume (ptid, step, GDB_SIGNAL_0); |
1192f124 SM |
1266 | proc_target->commit_resumed_state = true; |
1267 | proc_target->commit_resumed (); | |
1268 | proc_target->commit_resumed_state = false; | |
d02ed0bb MM |
1269 | continue; |
1270 | } | |
1271 | } | |
1272 | ||
1273 | /* The inferior is broken by a breakpoint or a signal. */ | |
1274 | break; | |
1275 | } | |
1276 | ||
1277 | return ret; | |
1278 | } | |
1279 | } | |
1280 | else | |
1281 | { | |
5b6d1e4f PA |
1282 | switch_to_thread (current_inferior ()->process_target (), |
1283 | record_full_resume_ptid); | |
d02ed0bb | 1284 | struct regcache *regcache = get_current_regcache (); |
ac7936df | 1285 | struct gdbarch *gdbarch = regcache->arch (); |
8b86c959 | 1286 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb | 1287 | int continue_flag = 1; |
88d1aa9d | 1288 | int first_record_full_end = 1; |
d02ed0bb | 1289 | |
a70b8144 | 1290 | try |
d02ed0bb | 1291 | { |
1ddbba9d | 1292 | CORE_ADDR tmp_pc; |
d02ed0bb | 1293 | |
1ddbba9d TT |
1294 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1295 | status->kind = TARGET_WAITKIND_STOPPED; | |
d02ed0bb | 1296 | |
1ddbba9d TT |
1297 | /* Check breakpoint when forward execute. */ |
1298 | if (execution_direction == EXEC_FORWARD) | |
d02ed0bb | 1299 | { |
1ddbba9d TT |
1300 | tmp_pc = regcache_read_pc (regcache); |
1301 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, | |
1302 | &record_full_stop_reason)) | |
1303 | { | |
1304 | if (record_debug) | |
1305 | fprintf_unfiltered (gdb_stdlog, | |
1306 | "Process record: break at %s.\n", | |
1307 | paddress (gdbarch, tmp_pc)); | |
1308 | goto replay_out; | |
1309 | } | |
d02ed0bb MM |
1310 | } |
1311 | ||
1ddbba9d TT |
1312 | /* If GDB is in terminal_inferior mode, it will not get the |
1313 | signal. And in GDB replay mode, GDB doesn't need to be | |
1314 | in terminal_inferior mode, because inferior will not | |
1315 | executed. Then set it to terminal_ours to make GDB get | |
1316 | the signal. */ | |
1317 | target_terminal::ours (); | |
1318 | ||
1319 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev | |
1320 | instruction. */ | |
1321 | if (execution_direction == EXEC_FORWARD && record_full_list->next) | |
1322 | record_full_list = record_full_list->next; | |
1323 | ||
1324 | /* Loop over the record_full_list, looking for the next place to | |
1325 | stop. */ | |
1326 | do | |
d02ed0bb | 1327 | { |
1ddbba9d TT |
1328 | /* Check for beginning and end of log. */ |
1329 | if (execution_direction == EXEC_REVERSE | |
1330 | && record_full_list == &record_full_first) | |
d02ed0bb | 1331 | { |
1ddbba9d TT |
1332 | /* Hit beginning of record log in reverse. */ |
1333 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1334 | break; | |
d02ed0bb | 1335 | } |
1ddbba9d TT |
1336 | if (execution_direction != EXEC_REVERSE |
1337 | && !record_full_list->next) | |
1338 | { | |
1339 | /* Hit end of record log going forward. */ | |
1340 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1341 | break; | |
1342 | } | |
1343 | ||
1344 | record_full_exec_insn (regcache, gdbarch, record_full_list); | |
1345 | ||
1346 | if (record_full_list->type == record_full_end) | |
d02ed0bb | 1347 | { |
1ddbba9d TT |
1348 | if (record_debug > 1) |
1349 | fprintf_unfiltered | |
1350 | (gdb_stdlog, | |
1351 | "Process record: record_full_end %s to " | |
1352 | "inferior.\n", | |
1353 | host_address_to_string (record_full_list)); | |
1354 | ||
1355 | if (first_record_full_end | |
1356 | && execution_direction == EXEC_REVERSE) | |
d02ed0bb | 1357 | { |
85102364 | 1358 | /* When reverse execute, the first |
1ddbba9d TT |
1359 | record_full_end is the part of current |
1360 | instruction. */ | |
1361 | first_record_full_end = 0; | |
d02ed0bb | 1362 | } |
1ddbba9d | 1363 | else |
d02ed0bb | 1364 | { |
1ddbba9d TT |
1365 | /* In EXEC_REVERSE mode, this is the |
1366 | record_full_end of prev instruction. In | |
1367 | EXEC_FORWARD mode, this is the | |
1368 | record_full_end of current instruction. */ | |
1369 | /* step */ | |
1370 | if (record_full_resume_step) | |
1371 | { | |
1372 | if (record_debug > 1) | |
1373 | fprintf_unfiltered (gdb_stdlog, | |
1374 | "Process record: step.\n"); | |
1375 | continue_flag = 0; | |
1376 | } | |
9e8915c6 | 1377 | |
1ddbba9d TT |
1378 | /* check breakpoint */ |
1379 | tmp_pc = regcache_read_pc (regcache); | |
1380 | if (record_check_stopped_by_breakpoint | |
1381 | (aspace, tmp_pc, &record_full_stop_reason)) | |
1382 | { | |
1383 | if (record_debug) | |
1384 | fprintf_unfiltered (gdb_stdlog, | |
1385 | "Process record: break " | |
1386 | "at %s.\n", | |
1387 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb | 1388 | |
1ddbba9d TT |
1389 | continue_flag = 0; |
1390 | } | |
1391 | ||
1392 | if (record_full_stop_reason | |
1393 | == TARGET_STOPPED_BY_WATCHPOINT) | |
1394 | { | |
1395 | if (record_debug) | |
1396 | fprintf_unfiltered (gdb_stdlog, | |
1397 | "Process record: hit hw " | |
1398 | "watchpoint.\n"); | |
1399 | continue_flag = 0; | |
1400 | } | |
1401 | /* Check target signal */ | |
1402 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) | |
1403 | /* FIXME: better way to check */ | |
1404 | continue_flag = 0; | |
d02ed0bb | 1405 | } |
d02ed0bb | 1406 | } |
d02ed0bb | 1407 | |
1ddbba9d | 1408 | if (continue_flag) |
d02ed0bb | 1409 | { |
1ddbba9d TT |
1410 | if (execution_direction == EXEC_REVERSE) |
1411 | { | |
1412 | if (record_full_list->prev) | |
1413 | record_full_list = record_full_list->prev; | |
1414 | } | |
1415 | else | |
1416 | { | |
1417 | if (record_full_list->next) | |
1418 | record_full_list = record_full_list->next; | |
1419 | } | |
d02ed0bb MM |
1420 | } |
1421 | } | |
1ddbba9d TT |
1422 | while (continue_flag); |
1423 | ||
1424 | replay_out: | |
1425 | if (record_full_get_sig) | |
1426 | status->value.sig = GDB_SIGNAL_INT; | |
1427 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) | |
1428 | /* FIXME: better way to check */ | |
1429 | status->value.sig = record_full_list->u.end.sigval; | |
1430 | else | |
1431 | status->value.sig = GDB_SIGNAL_TRAP; | |
d02ed0bb | 1432 | } |
230d2906 | 1433 | catch (const gdb_exception &ex) |
1ddbba9d TT |
1434 | { |
1435 | if (execution_direction == EXEC_REVERSE) | |
1436 | { | |
1437 | if (record_full_list->next) | |
1438 | record_full_list = record_full_list->next; | |
1439 | } | |
1440 | else | |
1441 | record_full_list = record_full_list->prev; | |
d02ed0bb | 1442 | |
eedc3f4f | 1443 | throw; |
1ddbba9d | 1444 | } |
d02ed0bb MM |
1445 | } |
1446 | ||
1447 | signal (SIGINT, handle_sigint); | |
1448 | ||
d02ed0bb MM |
1449 | return inferior_ptid; |
1450 | } | |
1451 | ||
f6ac5f3d PA |
1452 | ptid_t |
1453 | record_full_base_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
b60cea74 | 1454 | target_wait_flags options) |
d02ed0bb MM |
1455 | { |
1456 | ptid_t return_ptid; | |
1457 | ||
fdbc5215 SM |
1458 | clear_async_event_handler (record_full_async_inferior_event_token); |
1459 | ||
f6ac5f3d | 1460 | return_ptid = record_full_wait_1 (this, ptid, status, options); |
d02ed0bb MM |
1461 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1462 | { | |
1463 | /* We're reporting a stop. Make sure any spurious | |
1464 | target_wait(WNOHANG) doesn't advance the target until the | |
1465 | core wants us resumed again. */ | |
88d1aa9d | 1466 | record_full_resumed = 0; |
d02ed0bb MM |
1467 | } |
1468 | return return_ptid; | |
1469 | } | |
1470 | ||
57810aa7 | 1471 | bool |
f6ac5f3d | 1472 | record_full_base_target::stopped_by_watchpoint () |
d02ed0bb | 1473 | { |
88d1aa9d | 1474 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1475 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1476 | else |
b6a8c27b | 1477 | return beneath ()->stopped_by_watchpoint (); |
d02ed0bb MM |
1478 | } |
1479 | ||
57810aa7 | 1480 | bool |
f6ac5f3d | 1481 | record_full_base_target::stopped_data_address (CORE_ADDR *addr_p) |
d02ed0bb | 1482 | { |
88d1aa9d | 1483 | if (RECORD_FULL_IS_REPLAY) |
57810aa7 | 1484 | return false; |
d02ed0bb | 1485 | else |
b6a8c27b | 1486 | return this->beneath ()->stopped_data_address (addr_p); |
d02ed0bb MM |
1487 | } |
1488 | ||
f6ac5f3d | 1489 | /* The stopped_by_sw_breakpoint method of target record-full. */ |
9e8915c6 | 1490 | |
57810aa7 | 1491 | bool |
f6ac5f3d | 1492 | record_full_base_target::stopped_by_sw_breakpoint () |
9e8915c6 PA |
1493 | { |
1494 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1495 | } | |
1496 | ||
f6ac5f3d | 1497 | /* The supports_stopped_by_sw_breakpoint method of target |
9e8915c6 PA |
1498 | record-full. */ |
1499 | ||
57810aa7 | 1500 | bool |
f6ac5f3d | 1501 | record_full_base_target::supports_stopped_by_sw_breakpoint () |
9e8915c6 | 1502 | { |
57810aa7 | 1503 | return true; |
9e8915c6 PA |
1504 | } |
1505 | ||
f6ac5f3d | 1506 | /* The stopped_by_hw_breakpoint method of target record-full. */ |
9e8915c6 | 1507 | |
57810aa7 | 1508 | bool |
f6ac5f3d | 1509 | record_full_base_target::stopped_by_hw_breakpoint () |
9e8915c6 PA |
1510 | { |
1511 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
1512 | } | |
1513 | ||
f6ac5f3d | 1514 | /* The supports_stopped_by_sw_breakpoint method of target |
9e8915c6 PA |
1515 | record-full. */ |
1516 | ||
57810aa7 | 1517 | bool |
f6ac5f3d | 1518 | record_full_base_target::supports_stopped_by_hw_breakpoint () |
9e8915c6 | 1519 | { |
57810aa7 | 1520 | return true; |
9e8915c6 PA |
1521 | } |
1522 | ||
d02ed0bb MM |
1523 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1524 | ||
1525 | static void | |
88d1aa9d | 1526 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1527 | { |
88d1aa9d | 1528 | /* Check record_full_insn_num. */ |
651ce16a | 1529 | record_full_check_insn_num (); |
d02ed0bb | 1530 | |
88d1aa9d MM |
1531 | record_full_arch_list_head = NULL; |
1532 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1533 | |
1534 | if (regnum < 0) | |
1535 | { | |
1536 | int i; | |
1537 | ||
ac7936df | 1538 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
d02ed0bb | 1539 | { |
25ea693b | 1540 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1541 | { |
88d1aa9d | 1542 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1543 | error (_("Process record: failed to record execution log.")); |
1544 | } | |
1545 | } | |
1546 | } | |
1547 | else | |
1548 | { | |
25ea693b | 1549 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1550 | { |
88d1aa9d | 1551 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1552 | error (_("Process record: failed to record execution log.")); |
1553 | } | |
1554 | } | |
25ea693b | 1555 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1556 | { |
88d1aa9d | 1557 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1558 | error (_("Process record: failed to record execution log.")); |
1559 | } | |
88d1aa9d MM |
1560 | record_full_list->next = record_full_arch_list_head; |
1561 | record_full_arch_list_head->prev = record_full_list; | |
1562 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1563 | |
7ee70bf5 | 1564 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1565 | record_full_list_release_first (); |
d02ed0bb | 1566 | else |
88d1aa9d | 1567 | record_full_insn_num++; |
d02ed0bb MM |
1568 | } |
1569 | ||
f6ac5f3d | 1570 | /* "store_registers" method for process record target. */ |
d02ed0bb | 1571 | |
f6ac5f3d PA |
1572 | void |
1573 | record_full_target::store_registers (struct regcache *regcache, int regno) | |
d02ed0bb | 1574 | { |
88d1aa9d | 1575 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1576 | { |
88d1aa9d | 1577 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1578 | { |
1579 | int n; | |
1580 | ||
1581 | /* Let user choose if he wants to write register or not. */ | |
1582 | if (regno < 0) | |
1583 | n = | |
1584 | query (_("Because GDB is in replay mode, changing the " | |
1585 | "value of a register will make the execution " | |
1586 | "log unusable from this point onward. " | |
1587 | "Change all registers?")); | |
1588 | else | |
1589 | n = | |
1590 | query (_("Because GDB is in replay mode, changing the value " | |
1591 | "of a register will make the execution log unusable " | |
1592 | "from this point onward. Change register %s?"), | |
ac7936df | 1593 | gdbarch_register_name (regcache->arch (), |
d02ed0bb MM |
1594 | regno)); |
1595 | ||
1596 | if (!n) | |
1597 | { | |
1598 | /* Invalidate the value of regcache that was set in function | |
dda83cd7 | 1599 | "regcache_raw_write". */ |
d02ed0bb MM |
1600 | if (regno < 0) |
1601 | { | |
1602 | int i; | |
1603 | ||
1604 | for (i = 0; | |
ac7936df | 1605 | i < gdbarch_num_regs (regcache->arch ()); |
d02ed0bb | 1606 | i++) |
6aa7d724 | 1607 | regcache->invalidate (i); |
d02ed0bb MM |
1608 | } |
1609 | else | |
6aa7d724 | 1610 | regcache->invalidate (regno); |
d02ed0bb MM |
1611 | |
1612 | error (_("Process record canceled the operation.")); | |
1613 | } | |
1614 | ||
1615 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1616 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1617 | } |
1618 | ||
88d1aa9d | 1619 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1620 | } |
b6a8c27b | 1621 | this->beneath ()->store_registers (regcache, regno); |
d02ed0bb MM |
1622 | } |
1623 | ||
f6ac5f3d | 1624 | /* "xfer_partial" method. Behavior is conditional on |
88d1aa9d | 1625 | RECORD_FULL_IS_REPLAY. |
d02ed0bb MM |
1626 | In replay mode, we cannot write memory unles we are willing to |
1627 | invalidate the record/replay log from this point forward. */ | |
1628 | ||
f6ac5f3d PA |
1629 | enum target_xfer_status |
1630 | record_full_target::xfer_partial (enum target_object object, | |
1631 | const char *annex, gdb_byte *readbuf, | |
1632 | const gdb_byte *writebuf, ULONGEST offset, | |
1633 | ULONGEST len, ULONGEST *xfered_len) | |
d02ed0bb | 1634 | { |
88d1aa9d | 1635 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1636 | && (object == TARGET_OBJECT_MEMORY |
1637 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1638 | { | |
88d1aa9d | 1639 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1640 | { |
1641 | /* Let user choose if he wants to write memory or not. */ | |
1642 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
dda83cd7 SM |
1643 | "will make the execution log unusable from this " |
1644 | "point onward. Write memory at address %s?"), | |
d02ed0bb MM |
1645 | paddress (target_gdbarch (), offset))) |
1646 | error (_("Process record canceled the operation.")); | |
1647 | ||
1648 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1649 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1650 | } |
1651 | ||
88d1aa9d | 1652 | /* Check record_full_insn_num */ |
651ce16a | 1653 | record_full_check_insn_num (); |
d02ed0bb MM |
1654 | |
1655 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1656 | record_full_arch_list_head = NULL; |
1657 | record_full_arch_list_tail = NULL; | |
25ea693b | 1658 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1659 | { |
88d1aa9d | 1660 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1661 | if (record_debug) |
1662 | fprintf_unfiltered (gdb_stdlog, | |
1663 | "Process record: failed to record " | |
1664 | "execution log."); | |
2ed4b548 | 1665 | return TARGET_XFER_E_IO; |
d02ed0bb | 1666 | } |
25ea693b | 1667 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1668 | { |
88d1aa9d | 1669 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1670 | if (record_debug) |
1671 | fprintf_unfiltered (gdb_stdlog, | |
1672 | "Process record: failed to record " | |
1673 | "execution log."); | |
2ed4b548 | 1674 | return TARGET_XFER_E_IO; |
d02ed0bb | 1675 | } |
88d1aa9d MM |
1676 | record_full_list->next = record_full_arch_list_head; |
1677 | record_full_arch_list_head->prev = record_full_list; | |
1678 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1679 | |
7ee70bf5 | 1680 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1681 | record_full_list_release_first (); |
d02ed0bb | 1682 | else |
88d1aa9d | 1683 | record_full_insn_num++; |
d02ed0bb MM |
1684 | } |
1685 | ||
b6a8c27b PA |
1686 | return this->beneath ()->xfer_partial (object, annex, readbuf, writebuf, |
1687 | offset, len, xfered_len); | |
d02ed0bb MM |
1688 | } |
1689 | ||
1690 | /* This structure represents a breakpoint inserted while the record | |
1691 | target is active. We use this to know when to install/remove | |
1692 | breakpoints in/from the target beneath. For example, a breakpoint | |
1693 | may be inserted while recording, but removed when not replaying nor | |
1694 | recording. In that case, the breakpoint had not been inserted on | |
1695 | the target beneath, so we should not try to remove it there. */ | |
1696 | ||
88d1aa9d | 1697 | struct record_full_breakpoint |
d02ed0bb | 1698 | { |
219605fd TT |
1699 | record_full_breakpoint (struct address_space *address_space_, |
1700 | CORE_ADDR addr_, | |
1701 | bool in_target_beneath_) | |
1702 | : address_space (address_space_), | |
1703 | addr (addr_), | |
1704 | in_target_beneath (in_target_beneath_) | |
1705 | { | |
1706 | } | |
1707 | ||
d02ed0bb MM |
1708 | /* The address and address space the breakpoint was set at. */ |
1709 | struct address_space *address_space; | |
1710 | CORE_ADDR addr; | |
1711 | ||
1712 | /* True when the breakpoint has been also installed in the target | |
1713 | beneath. This will be false for breakpoints set during replay or | |
1714 | when recording. */ | |
219605fd | 1715 | bool in_target_beneath; |
d02ed0bb MM |
1716 | }; |
1717 | ||
d02ed0bb MM |
1718 | /* The list of breakpoints inserted while the record target is |
1719 | active. */ | |
219605fd | 1720 | static std::vector<record_full_breakpoint> record_full_breakpoints; |
d02ed0bb | 1721 | |
88d1aa9d | 1722 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1723 | |
1724 | static void | |
88d1aa9d | 1725 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1726 | { |
219605fd | 1727 | record_full_breakpoints.clear (); |
d02ed0bb | 1728 | |
055c879f SM |
1729 | for (bp_location *loc : all_bp_locations ()) |
1730 | { | |
1731 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1732 | continue; | |
1733 | ||
1734 | if (loc->inserted) | |
1735 | record_full_breakpoints.emplace_back | |
1736 | (loc->target_info.placed_address_space, | |
1737 | loc->target_info.placed_address, 1); | |
1738 | } | |
d02ed0bb MM |
1739 | } |
1740 | ||
88d1aa9d | 1741 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1742 | insert or remove breakpoints in the real target when replaying, nor |
1743 | when recording. */ | |
1744 | ||
f6ac5f3d PA |
1745 | int |
1746 | record_full_target::insert_breakpoint (struct gdbarch *gdbarch, | |
1747 | struct bp_target_info *bp_tgt) | |
d02ed0bb | 1748 | { |
219605fd | 1749 | bool in_target_beneath = false; |
d02ed0bb | 1750 | |
88d1aa9d | 1751 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1752 | { |
1753 | /* When recording, we currently always single-step, so we don't | |
1754 | really need to install regular breakpoints in the inferior. | |
1755 | However, we do have to insert software single-step | |
1756 | breakpoints, in case the target can't hardware step. To keep | |
f99bd5f2 | 1757 | things simple, we always insert. */ |
d02ed0bb | 1758 | |
07036511 TT |
1759 | scoped_restore restore_operation_disable |
1760 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 1761 | |
b6a8c27b | 1762 | int ret = this->beneath ()->insert_breakpoint (gdbarch, bp_tgt); |
d02ed0bb MM |
1763 | if (ret != 0) |
1764 | return ret; | |
1765 | ||
219605fd | 1766 | in_target_beneath = true; |
d02ed0bb MM |
1767 | } |
1768 | ||
e390720b YQ |
1769 | /* Use the existing entries if found in order to avoid duplication |
1770 | in record_full_breakpoints. */ | |
1771 | ||
19f3f25f | 1772 | for (const record_full_breakpoint &bp : record_full_breakpoints) |
e390720b | 1773 | { |
219605fd TT |
1774 | if (bp.addr == bp_tgt->placed_address |
1775 | && bp.address_space == bp_tgt->placed_address_space) | |
e390720b | 1776 | { |
219605fd | 1777 | gdb_assert (bp.in_target_beneath == in_target_beneath); |
e390720b YQ |
1778 | return 0; |
1779 | } | |
1780 | } | |
1781 | ||
219605fd TT |
1782 | record_full_breakpoints.emplace_back (bp_tgt->placed_address_space, |
1783 | bp_tgt->placed_address, | |
1784 | in_target_beneath); | |
d02ed0bb MM |
1785 | return 0; |
1786 | } | |
1787 | ||
f6ac5f3d | 1788 | /* "remove_breakpoint" method for process record target. */ |
d02ed0bb | 1789 | |
f6ac5f3d PA |
1790 | int |
1791 | record_full_target::remove_breakpoint (struct gdbarch *gdbarch, | |
1792 | struct bp_target_info *bp_tgt, | |
1793 | enum remove_bp_reason reason) | |
d02ed0bb | 1794 | { |
219605fd TT |
1795 | for (auto iter = record_full_breakpoints.begin (); |
1796 | iter != record_full_breakpoints.end (); | |
1797 | ++iter) | |
d02ed0bb | 1798 | { |
219605fd TT |
1799 | struct record_full_breakpoint &bp = *iter; |
1800 | ||
1801 | if (bp.addr == bp_tgt->placed_address | |
1802 | && bp.address_space == bp_tgt->placed_address_space) | |
d02ed0bb | 1803 | { |
219605fd | 1804 | if (bp.in_target_beneath) |
d02ed0bb | 1805 | { |
07036511 TT |
1806 | scoped_restore restore_operation_disable |
1807 | = record_full_gdb_operation_disable_set (); | |
f6ac5f3d | 1808 | |
b6a8c27b PA |
1809 | int ret = this->beneath ()->remove_breakpoint (gdbarch, bp_tgt, |
1810 | reason); | |
d02ed0bb MM |
1811 | if (ret != 0) |
1812 | return ret; | |
1813 | } | |
1814 | ||
01d3dedf | 1815 | if (reason == REMOVE_BREAKPOINT) |
219605fd | 1816 | unordered_remove (record_full_breakpoints, iter); |
d02ed0bb MM |
1817 | return 0; |
1818 | } | |
1819 | } | |
1820 | ||
1821 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1822 | } | |
1823 | ||
f6ac5f3d | 1824 | /* "can_execute_reverse" method for process record target. */ |
d02ed0bb | 1825 | |
57810aa7 | 1826 | bool |
f6ac5f3d | 1827 | record_full_base_target::can_execute_reverse () |
d02ed0bb | 1828 | { |
57810aa7 | 1829 | return true; |
d02ed0bb MM |
1830 | } |
1831 | ||
f6ac5f3d | 1832 | /* "get_bookmark" method for process record and prec over core. */ |
d02ed0bb | 1833 | |
f6ac5f3d PA |
1834 | gdb_byte * |
1835 | record_full_base_target::get_bookmark (const char *args, int from_tty) | |
d02ed0bb | 1836 | { |
0f928d68 | 1837 | char *ret = NULL; |
d02ed0bb MM |
1838 | |
1839 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1840 | if (record_full_list && record_full_list->type == record_full_end) |
1841 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1842 | |
1843 | if (record_debug) | |
1844 | { | |
1845 | if (ret) | |
1846 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1847 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1848 | else |
1849 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1850 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1851 | } |
0f928d68 | 1852 | return (gdb_byte *) ret; |
d02ed0bb MM |
1853 | } |
1854 | ||
f6ac5f3d | 1855 | /* "goto_bookmark" method for process record and prec over core. */ |
d02ed0bb | 1856 | |
f6ac5f3d PA |
1857 | void |
1858 | record_full_base_target::goto_bookmark (const gdb_byte *raw_bookmark, | |
1859 | int from_tty) | |
d02ed0bb | 1860 | { |
c2bcbb1d | 1861 | const char *bookmark = (const char *) raw_bookmark; |
0f928d68 | 1862 | |
d02ed0bb MM |
1863 | if (record_debug) |
1864 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1865 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb | 1866 | |
a2b2bc12 | 1867 | std::string name_holder; |
d02ed0bb MM |
1868 | if (bookmark[0] == '\'' || bookmark[0] == '\"') |
1869 | { | |
1870 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) | |
1871 | error (_("Unbalanced quotes: %s"), bookmark); | |
1872 | ||
a2b2bc12 TT |
1873 | name_holder = std::string (bookmark + 1, strlen (bookmark) - 2); |
1874 | bookmark = name_holder.c_str (); | |
d02ed0bb MM |
1875 | } |
1876 | ||
c2bcbb1d | 1877 | record_goto (bookmark); |
d02ed0bb MM |
1878 | } |
1879 | ||
f6ac5f3d PA |
1880 | enum exec_direction_kind |
1881 | record_full_base_target::execution_direction () | |
d02ed0bb | 1882 | { |
88d1aa9d | 1883 | return record_full_execution_dir; |
d02ed0bb MM |
1884 | } |
1885 | ||
f6ac5f3d | 1886 | /* The record_method method of target record-full. */ |
b158a20f TW |
1887 | |
1888 | enum record_method | |
f6ac5f3d | 1889 | record_full_base_target::record_method (ptid_t ptid) |
b158a20f TW |
1890 | { |
1891 | return RECORD_METHOD_FULL; | |
1892 | } | |
1893 | ||
f6ac5f3d PA |
1894 | void |
1895 | record_full_base_target::info_record () | |
d02ed0bb | 1896 | { |
88d1aa9d | 1897 | struct record_full_entry *p; |
d02ed0bb | 1898 | |
88d1aa9d | 1899 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1900 | printf_filtered (_("Replay mode:\n")); |
1901 | else | |
1902 | printf_filtered (_("Record mode:\n")); | |
1903 | ||
1904 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1905 | for (p = record_full_first.next; |
1906 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1907 | p = p->next) |
1908 | ; | |
1909 | ||
1910 | /* Do we have a log at all? */ | |
88d1aa9d | 1911 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1912 | { |
1913 | /* Display instruction number for first instruction in the log. */ | |
1914 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1915 | pulongest (p->u.end.insn_num)); | |
1916 | ||
1917 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1918 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1919 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1920 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1921 | |
1922 | /* Display instruction number for last instruction in the log. */ | |
1923 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1924 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1925 | |
1926 | /* Display log count. */ | |
7ee70bf5 | 1927 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1928 | record_full_insn_num); |
d02ed0bb MM |
1929 | } |
1930 | else | |
1931 | printf_filtered (_("No instructions have been logged.\n")); | |
1932 | ||
1933 | /* Display max log size. */ | |
7ee70bf5 | 1934 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1935 | record_full_insn_max_num); |
d02ed0bb MM |
1936 | } |
1937 | ||
f6ac5f3d PA |
1938 | bool |
1939 | record_full_base_target::supports_delete_record () | |
1940 | { | |
1941 | return true; | |
1942 | } | |
d02ed0bb | 1943 | |
f6ac5f3d PA |
1944 | /* The "delete_record" target method. */ |
1945 | ||
1946 | void | |
1947 | record_full_base_target::delete_record () | |
d02ed0bb | 1948 | { |
88d1aa9d | 1949 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1950 | } |
1951 | ||
f6ac5f3d | 1952 | /* The "record_is_replaying" target method. */ |
d02ed0bb | 1953 | |
57810aa7 | 1954 | bool |
f6ac5f3d | 1955 | record_full_base_target::record_is_replaying (ptid_t ptid) |
d02ed0bb | 1956 | { |
88d1aa9d | 1957 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1958 | } |
1959 | ||
f6ac5f3d | 1960 | /* The "record_will_replay" target method. */ |
7ff27e9b | 1961 | |
57810aa7 | 1962 | bool |
f6ac5f3d | 1963 | record_full_base_target::record_will_replay (ptid_t ptid, int dir) |
7ff27e9b MM |
1964 | { |
1965 | /* We can currently only record when executing forwards. Should we be able | |
1966 | to record when executing backwards on targets that support reverse | |
1967 | execution, this needs to be changed. */ | |
1968 | ||
1969 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1970 | } | |
1971 | ||
d02ed0bb MM |
1972 | /* Go to a specific entry. */ |
1973 | ||
1974 | static void | |
88d1aa9d | 1975 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1976 | { |
1977 | if (p == NULL) | |
1978 | error (_("Target insn not found.")); | |
88d1aa9d | 1979 | else if (p == record_full_list) |
d02ed0bb | 1980 | error (_("Already at target insn.")); |
88d1aa9d | 1981 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1982 | { |
1983 | printf_filtered (_("Go forward to insn number %s\n"), | |
1984 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1985 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
1986 | } |
1987 | else | |
1988 | { | |
1989 | printf_filtered (_("Go backward to insn number %s\n"), | |
1990 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 1991 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
1992 | } |
1993 | ||
1994 | registers_changed (); | |
1995 | reinit_frame_cache (); | |
f2ffa92b PA |
1996 | inferior_thread ()->suspend.stop_pc |
1997 | = regcache_read_pc (get_current_regcache ()); | |
08d72866 | 1998 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
1999 | } |
2000 | ||
f6ac5f3d | 2001 | /* The "goto_record_begin" target method. */ |
d02ed0bb | 2002 | |
f6ac5f3d PA |
2003 | void |
2004 | record_full_base_target::goto_record_begin () | |
d02ed0bb | 2005 | { |
88d1aa9d | 2006 | struct record_full_entry *p = NULL; |
d02ed0bb | 2007 | |
88d1aa9d MM |
2008 | for (p = &record_full_first; p != NULL; p = p->next) |
2009 | if (p->type == record_full_end) | |
d02ed0bb MM |
2010 | break; |
2011 | ||
88d1aa9d | 2012 | record_full_goto_entry (p); |
d02ed0bb MM |
2013 | } |
2014 | ||
f6ac5f3d | 2015 | /* The "goto_record_end" target method. */ |
d02ed0bb | 2016 | |
f6ac5f3d PA |
2017 | void |
2018 | record_full_base_target::goto_record_end () | |
d02ed0bb | 2019 | { |
88d1aa9d | 2020 | struct record_full_entry *p = NULL; |
d02ed0bb | 2021 | |
88d1aa9d | 2022 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
2023 | ; |
2024 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 2025 | if (p->type == record_full_end) |
d02ed0bb MM |
2026 | break; |
2027 | ||
88d1aa9d | 2028 | record_full_goto_entry (p); |
d02ed0bb MM |
2029 | } |
2030 | ||
f6ac5f3d | 2031 | /* The "goto_record" target method. */ |
d02ed0bb | 2032 | |
f6ac5f3d PA |
2033 | void |
2034 | record_full_base_target::goto_record (ULONGEST target_insn) | |
d02ed0bb | 2035 | { |
88d1aa9d | 2036 | struct record_full_entry *p = NULL; |
d02ed0bb | 2037 | |
88d1aa9d MM |
2038 | for (p = &record_full_first; p != NULL; p = p->next) |
2039 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
2040 | break; |
2041 | ||
88d1aa9d | 2042 | record_full_goto_entry (p); |
d02ed0bb MM |
2043 | } |
2044 | ||
f6ac5f3d | 2045 | /* The "record_stop_replaying" target method. */ |
797094dd | 2046 | |
f6ac5f3d PA |
2047 | void |
2048 | record_full_base_target::record_stop_replaying () | |
797094dd | 2049 | { |
f6ac5f3d | 2050 | goto_record_end (); |
797094dd MM |
2051 | } |
2052 | ||
f6ac5f3d | 2053 | /* "resume" method for prec over corefile. */ |
d02ed0bb | 2054 | |
f6ac5f3d PA |
2055 | void |
2056 | record_full_core_target::resume (ptid_t ptid, int step, | |
2057 | enum gdb_signal signal) | |
d02ed0bb | 2058 | { |
88d1aa9d MM |
2059 | record_full_resume_step = step; |
2060 | record_full_resumed = 1; | |
f6ac5f3d | 2061 | record_full_execution_dir = ::execution_direction; |
d02ed0bb MM |
2062 | |
2063 | /* We are about to start executing the inferior (or simulate it), | |
2064 | let's register it with the event loop. */ | |
2065 | if (target_can_async_p ()) | |
6a3753b3 | 2066 | target_async (1); |
d02ed0bb MM |
2067 | } |
2068 | ||
f6ac5f3d | 2069 | /* "kill" method for prec over corefile. */ |
d02ed0bb | 2070 | |
f6ac5f3d PA |
2071 | void |
2072 | record_full_core_target::kill () | |
d02ed0bb MM |
2073 | { |
2074 | if (record_debug) | |
88d1aa9d | 2075 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2076 | |
fadf6add | 2077 | current_inferior ()->unpush_target (this); |
d02ed0bb MM |
2078 | } |
2079 | ||
f6ac5f3d | 2080 | /* "fetch_registers" method for prec over corefile. */ |
d02ed0bb | 2081 | |
f6ac5f3d PA |
2082 | void |
2083 | record_full_core_target::fetch_registers (struct regcache *regcache, | |
2084 | int regno) | |
d02ed0bb MM |
2085 | { |
2086 | if (regno < 0) | |
2087 | { | |
ac7936df | 2088 | int num = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
2089 | int i; |
2090 | ||
2091 | for (i = 0; i < num; i ++) | |
c8ec2f33 | 2092 | regcache->raw_supply (i, *record_full_core_regbuf); |
d02ed0bb MM |
2093 | } |
2094 | else | |
c8ec2f33 | 2095 | regcache->raw_supply (regno, *record_full_core_regbuf); |
d02ed0bb MM |
2096 | } |
2097 | ||
f6ac5f3d | 2098 | /* "prepare_to_store" method for prec over corefile. */ |
d02ed0bb | 2099 | |
f6ac5f3d PA |
2100 | void |
2101 | record_full_core_target::prepare_to_store (struct regcache *regcache) | |
d02ed0bb MM |
2102 | { |
2103 | } | |
2104 | ||
f6ac5f3d | 2105 | /* "store_registers" method for prec over corefile. */ |
d02ed0bb | 2106 | |
f6ac5f3d PA |
2107 | void |
2108 | record_full_core_target::store_registers (struct regcache *regcache, | |
2109 | int regno) | |
d02ed0bb | 2110 | { |
88d1aa9d | 2111 | if (record_full_gdb_operation_disable) |
c8ec2f33 | 2112 | record_full_core_regbuf->raw_supply (regno, *regcache); |
d02ed0bb MM |
2113 | else |
2114 | error (_("You can't do that without a process to debug.")); | |
2115 | } | |
2116 | ||
f6ac5f3d | 2117 | /* "xfer_partial" method for prec over corefile. */ |
d02ed0bb | 2118 | |
f6ac5f3d PA |
2119 | enum target_xfer_status |
2120 | record_full_core_target::xfer_partial (enum target_object object, | |
2121 | const char *annex, gdb_byte *readbuf, | |
2122 | const gdb_byte *writebuf, ULONGEST offset, | |
2123 | ULONGEST len, ULONGEST *xfered_len) | |
d02ed0bb MM |
2124 | { |
2125 | if (object == TARGET_OBJECT_MEMORY) | |
2126 | { | |
88d1aa9d | 2127 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb | 2128 | { |
d7a78e5c | 2129 | for (target_section &p : record_full_core_sections) |
d02ed0bb | 2130 | { |
bb2a6777 | 2131 | if (offset >= p.addr) |
d02ed0bb | 2132 | { |
88d1aa9d | 2133 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2134 | ULONGEST sec_offset; |
2135 | ||
bb2a6777 | 2136 | if (offset >= p.endaddr) |
d02ed0bb MM |
2137 | continue; |
2138 | ||
bb2a6777 TT |
2139 | if (offset + len > p.endaddr) |
2140 | len = p.endaddr - offset; | |
d02ed0bb | 2141 | |
bb2a6777 | 2142 | sec_offset = offset - p.addr; |
d02ed0bb MM |
2143 | |
2144 | /* Read readbuf or write writebuf p, offset, len. */ | |
2145 | /* Check flags. */ | |
bb2a6777 TT |
2146 | if (p.the_bfd_section->flags & SEC_CONSTRUCTOR |
2147 | || (p.the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
d02ed0bb MM |
2148 | { |
2149 | if (readbuf) | |
2150 | memset (readbuf, 0, len); | |
9b409511 YQ |
2151 | |
2152 | *xfered_len = len; | |
2153 | return TARGET_XFER_OK; | |
d02ed0bb | 2154 | } |
88d1aa9d MM |
2155 | /* Get record_full_core_buf_entry. */ |
2156 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb | 2157 | entry = entry->prev) |
bb2a6777 | 2158 | if (entry->p == &p) |
d02ed0bb MM |
2159 | break; |
2160 | if (writebuf) | |
2161 | { | |
2162 | if (!entry) | |
2163 | { | |
2164 | /* Add a new entry. */ | |
8d749320 | 2165 | entry = XNEW (struct record_full_core_buf_entry); |
bb2a6777 | 2166 | entry->p = &p; |
2b2848e2 | 2167 | if (!bfd_malloc_and_get_section |
dda83cd7 | 2168 | (p.the_bfd_section->owner, |
bb2a6777 | 2169 | p.the_bfd_section, |
2b2848e2 | 2170 | &entry->buf)) |
d02ed0bb MM |
2171 | { |
2172 | xfree (entry); | |
9b409511 | 2173 | return TARGET_XFER_EOF; |
d02ed0bb | 2174 | } |
88d1aa9d MM |
2175 | entry->prev = record_full_core_buf_list; |
2176 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2177 | } |
2178 | ||
2179 | memcpy (entry->buf + sec_offset, writebuf, | |
2180 | (size_t) len); | |
2181 | } | |
2182 | else | |
2183 | { | |
2184 | if (!entry) | |
b6a8c27b PA |
2185 | return this->beneath ()->xfer_partial (object, annex, |
2186 | readbuf, writebuf, | |
2187 | offset, len, | |
2188 | xfered_len); | |
d02ed0bb MM |
2189 | |
2190 | memcpy (readbuf, entry->buf + sec_offset, | |
2191 | (size_t) len); | |
2192 | } | |
2193 | ||
9b409511 YQ |
2194 | *xfered_len = len; |
2195 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2196 | } |
2197 | } | |
2198 | ||
2ed4b548 | 2199 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2200 | } |
2201 | else | |
2202 | error (_("You can't do that without a process to debug.")); | |
2203 | } | |
2204 | ||
b6a8c27b PA |
2205 | return this->beneath ()->xfer_partial (object, annex, |
2206 | readbuf, writebuf, offset, len, | |
2207 | xfered_len); | |
d02ed0bb MM |
2208 | } |
2209 | ||
f6ac5f3d | 2210 | /* "insert_breakpoint" method for prec over corefile. */ |
d02ed0bb | 2211 | |
f6ac5f3d PA |
2212 | int |
2213 | record_full_core_target::insert_breakpoint (struct gdbarch *gdbarch, | |
2214 | struct bp_target_info *bp_tgt) | |
d02ed0bb MM |
2215 | { |
2216 | return 0; | |
2217 | } | |
2218 | ||
f6ac5f3d | 2219 | /* "remove_breakpoint" method for prec over corefile. */ |
d02ed0bb | 2220 | |
f6ac5f3d PA |
2221 | int |
2222 | record_full_core_target::remove_breakpoint (struct gdbarch *gdbarch, | |
2223 | struct bp_target_info *bp_tgt, | |
2224 | enum remove_bp_reason reason) | |
d02ed0bb MM |
2225 | { |
2226 | return 0; | |
2227 | } | |
2228 | ||
f6ac5f3d | 2229 | /* "has_execution" method for prec over corefile. */ |
d02ed0bb | 2230 | |
57810aa7 | 2231 | bool |
5018ce90 | 2232 | record_full_core_target::has_execution (inferior *inf) |
d02ed0bb | 2233 | { |
57810aa7 | 2234 | return true; |
d02ed0bb MM |
2235 | } |
2236 | ||
d02ed0bb MM |
2237 | /* Record log save-file format |
2238 | Version 1 (never released) | |
2239 | ||
2240 | Header: | |
2241 | 4 bytes: magic number htonl(0x20090829). | |
2242 | NOTE: be sure to change whenever this file format changes! | |
2243 | ||
2244 | Records: | |
88d1aa9d MM |
2245 | record_full_end: |
2246 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2247 | record_full_reg: | |
2248 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2249 | 8 bytes: register id (network byte order). |
2250 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2251 | record_full_mem: |
2252 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2253 | 8 bytes: memory length (network byte order). |
2254 | 8 bytes: memory address (network byte order). | |
2255 | n bytes: memory value (n == memory length). | |
2256 | ||
2257 | Version 2 | |
2258 | 4 bytes: magic number netorder32(0x20091016). | |
2259 | NOTE: be sure to change whenever this file format changes! | |
2260 | ||
2261 | Records: | |
88d1aa9d MM |
2262 | record_full_end: |
2263 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2264 | 4 bytes: signal |
2265 | 4 bytes: instruction count | |
88d1aa9d MM |
2266 | record_full_reg: |
2267 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2268 | 4 bytes: register id (network byte order). |
2269 | n bytes: register value (n == actual register size). | |
dda83cd7 | 2270 | (eg. 4 bytes for x86 general registers). |
88d1aa9d MM |
2271 | record_full_mem: |
2272 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2273 | 4 bytes: memory length (network byte order). |
2274 | 8 bytes: memory address (network byte order). | |
2275 | n bytes: memory value (n == memory length). | |
2276 | ||
2277 | */ | |
2278 | ||
2279 | /* bfdcore_read -- read bytes from a core file section. */ | |
2280 | ||
2281 | static inline void | |
2282 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2283 | { | |
2284 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2285 | ||
2286 | if (ret) | |
2287 | *offset += len; | |
2288 | else | |
2289 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2290 | len, bfd_get_filename (obfd), | |
2291 | bfd_errmsg (bfd_get_error ())); | |
2292 | } | |
2293 | ||
2294 | static inline uint64_t | |
2295 | netorder64 (uint64_t input) | |
2296 | { | |
2297 | uint64_t ret; | |
2298 | ||
2299 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2300 | BFD_ENDIAN_BIG, input); | |
2301 | return ret; | |
2302 | } | |
2303 | ||
2304 | static inline uint32_t | |
2305 | netorder32 (uint32_t input) | |
2306 | { | |
2307 | uint32_t ret; | |
2308 | ||
d02ed0bb MM |
2309 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), |
2310 | BFD_ENDIAN_BIG, input); | |
2311 | return ret; | |
2312 | } | |
2313 | ||
2314 | /* Restore the execution log from a core_bfd file. */ | |
2315 | static void | |
88d1aa9d | 2316 | record_full_restore (void) |
d02ed0bb MM |
2317 | { |
2318 | uint32_t magic; | |
88d1aa9d | 2319 | struct record_full_entry *rec; |
d02ed0bb MM |
2320 | asection *osec; |
2321 | uint32_t osec_size; | |
2322 | int bfd_offset = 0; | |
2323 | struct regcache *regcache; | |
2324 | ||
2325 | /* We restore the execution log from the open core bfd, | |
2326 | if there is one. */ | |
2327 | if (core_bfd == NULL) | |
2328 | return; | |
2329 | ||
88d1aa9d MM |
2330 | /* "record_full_restore" can only be called when record list is empty. */ |
2331 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2332 | |
2333 | if (record_debug) | |
2334 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2335 | ||
2336 | /* Now need to find our special note section. */ | |
2337 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2338 | if (record_debug) | |
2339 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2340 | osec ? "succeeded" : "failed"); | |
2341 | if (osec == NULL) | |
2342 | return; | |
fd361982 | 2343 | osec_size = bfd_section_size (osec); |
d02ed0bb | 2344 | if (record_debug) |
fd361982 | 2345 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (osec)); |
d02ed0bb MM |
2346 | |
2347 | /* Check the magic code. */ | |
2348 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2349 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2350 | error (_("Version mis-match or file format error in core file %s."), |
2351 | bfd_get_filename (core_bfd)); | |
2352 | if (record_debug) | |
2353 | fprintf_unfiltered (gdb_stdlog, | |
2354 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2355 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2356 | phex_nz (netorder32 (magic), 4)); |
2357 | ||
88d1aa9d MM |
2358 | /* Restore the entries in recfd into record_full_arch_list_head and |
2359 | record_full_arch_list_tail. */ | |
2360 | record_full_arch_list_head = NULL; | |
2361 | record_full_arch_list_tail = NULL; | |
2362 | record_full_insn_num = 0; | |
d02ed0bb | 2363 | |
a70b8144 | 2364 | try |
d02ed0bb | 2365 | { |
1ddbba9d TT |
2366 | regcache = get_current_regcache (); |
2367 | ||
2368 | while (1) | |
2369 | { | |
2370 | uint8_t rectype; | |
2371 | uint32_t regnum, len, signal, count; | |
2372 | uint64_t addr; | |
d02ed0bb | 2373 | |
1ddbba9d TT |
2374 | /* We are finished when offset reaches osec_size. */ |
2375 | if (bfd_offset >= osec_size) | |
2376 | break; | |
2377 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
d02ed0bb | 2378 | |
1ddbba9d TT |
2379 | switch (rectype) |
2380 | { | |
2381 | case record_full_reg: /* reg */ | |
2382 | /* Get register number to regnum. */ | |
2383 | bfdcore_read (core_bfd, osec, ®num, | |
2384 | sizeof (regnum), &bfd_offset); | |
2385 | regnum = netorder32 (regnum); | |
d02ed0bb | 2386 | |
1ddbba9d | 2387 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 2388 | |
1ddbba9d TT |
2389 | /* Get val. */ |
2390 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), | |
2391 | rec->u.reg.len, &bfd_offset); | |
d02ed0bb | 2392 | |
1ddbba9d TT |
2393 | if (record_debug) |
2394 | fprintf_unfiltered (gdb_stdlog, | |
2395 | " Reading register %d (1 " | |
2396 | "plus %lu plus %d bytes)\n", | |
2397 | rec->u.reg.num, | |
2398 | (unsigned long) sizeof (regnum), | |
2399 | rec->u.reg.len); | |
2400 | break; | |
d02ed0bb | 2401 | |
1ddbba9d TT |
2402 | case record_full_mem: /* mem */ |
2403 | /* Get len. */ | |
2404 | bfdcore_read (core_bfd, osec, &len, | |
2405 | sizeof (len), &bfd_offset); | |
2406 | len = netorder32 (len); | |
d02ed0bb | 2407 | |
1ddbba9d TT |
2408 | /* Get addr. */ |
2409 | bfdcore_read (core_bfd, osec, &addr, | |
2410 | sizeof (addr), &bfd_offset); | |
2411 | addr = netorder64 (addr); | |
2412 | ||
2413 | rec = record_full_mem_alloc (addr, len); | |
2414 | ||
2415 | /* Get val. */ | |
2416 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), | |
2417 | rec->u.mem.len, &bfd_offset); | |
2418 | ||
2419 | if (record_debug) | |
2420 | fprintf_unfiltered (gdb_stdlog, | |
2421 | " Reading memory %s (1 plus " | |
2422 | "%lu plus %lu plus %d bytes)\n", | |
2423 | paddress (get_current_arch (), | |
2424 | rec->u.mem.addr), | |
2425 | (unsigned long) sizeof (addr), | |
2426 | (unsigned long) sizeof (len), | |
2427 | rec->u.mem.len); | |
2428 | break; | |
2429 | ||
2430 | case record_full_end: /* end */ | |
2431 | rec = record_full_end_alloc (); | |
2432 | record_full_insn_num ++; | |
2433 | ||
2434 | /* Get signal value. */ | |
2435 | bfdcore_read (core_bfd, osec, &signal, | |
2436 | sizeof (signal), &bfd_offset); | |
2437 | signal = netorder32 (signal); | |
2438 | rec->u.end.sigval = (enum gdb_signal) signal; | |
2439 | ||
2440 | /* Get insn count. */ | |
2441 | bfdcore_read (core_bfd, osec, &count, | |
2442 | sizeof (count), &bfd_offset); | |
2443 | count = netorder32 (count); | |
2444 | rec->u.end.insn_num = count; | |
2445 | record_full_insn_count = count + 1; | |
2446 | if (record_debug) | |
2447 | fprintf_unfiltered (gdb_stdlog, | |
2448 | " Reading record_full_end (1 + " | |
2449 | "%lu + %lu bytes), offset == %s\n", | |
2450 | (unsigned long) sizeof (signal), | |
2451 | (unsigned long) sizeof (count), | |
2452 | paddress (get_current_arch (), | |
2453 | bfd_offset)); | |
2454 | break; | |
2455 | ||
2456 | default: | |
2457 | error (_("Bad entry type in core file %s."), | |
2458 | bfd_get_filename (core_bfd)); | |
2459 | break; | |
2460 | } | |
d02ed0bb | 2461 | |
1ddbba9d TT |
2462 | /* Add rec to record arch list. */ |
2463 | record_full_arch_list_add (rec); | |
2464 | } | |
2465 | } | |
230d2906 | 2466 | catch (const gdb_exception &ex) |
1ddbba9d TT |
2467 | { |
2468 | record_full_list_release (record_full_arch_list_tail); | |
eedc3f4f | 2469 | throw; |
1ddbba9d | 2470 | } |
d02ed0bb | 2471 | |
88d1aa9d MM |
2472 | /* Add record_full_arch_list_head to the end of record list. */ |
2473 | record_full_first.next = record_full_arch_list_head; | |
2474 | record_full_arch_list_head->prev = &record_full_first; | |
2475 | record_full_arch_list_tail->next = NULL; | |
2476 | record_full_list = &record_full_first; | |
d02ed0bb | 2477 | |
88d1aa9d MM |
2478 | /* Update record_full_insn_max_num. */ |
2479 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2480 | { |
88d1aa9d | 2481 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2482 | warning (_("Auto increase record/replay buffer limit to %u."), |
dda83cd7 | 2483 | record_full_insn_max_num); |
d02ed0bb MM |
2484 | } |
2485 | ||
2486 | /* Succeeded. */ | |
2487 | printf_filtered (_("Restored records from core file %s.\n"), | |
2488 | bfd_get_filename (core_bfd)); | |
2489 | ||
08d72866 | 2490 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2491 | } |
2492 | ||
2493 | /* bfdcore_write -- write bytes into a core file section. */ | |
2494 | ||
2495 | static inline void | |
2496 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2497 | { | |
2498 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2499 | ||
2500 | if (ret) | |
2501 | *offset += len; | |
2502 | else | |
2503 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2504 | len, bfd_get_filename (obfd), | |
2505 | bfd_errmsg (bfd_get_error ())); | |
2506 | } | |
2507 | ||
2508 | /* Restore the execution log from a file. We use a modified elf | |
2509 | corefile format, with an extra section for our data. */ | |
2510 | ||
2511 | static void | |
41243651 | 2512 | cmd_record_full_restore (const char *args, int from_tty) |
d02ed0bb MM |
2513 | { |
2514 | core_file_command (args, from_tty); | |
d9f719f1 | 2515 | record_full_open (args, from_tty); |
d02ed0bb MM |
2516 | } |
2517 | ||
d02ed0bb MM |
2518 | /* Save the execution log to a file. We use a modified elf corefile |
2519 | format, with an extra section for our data. */ | |
2520 | ||
f6ac5f3d PA |
2521 | void |
2522 | record_full_base_target::save_record (const char *recfilename) | |
d02ed0bb | 2523 | { |
88d1aa9d | 2524 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2525 | uint32_t magic; |
2526 | struct regcache *regcache; | |
2527 | struct gdbarch *gdbarch; | |
d02ed0bb MM |
2528 | int save_size = 0; |
2529 | asection *osec = NULL; | |
2530 | int bfd_offset = 0; | |
2531 | ||
2532 | /* Open the save file. */ | |
2533 | if (record_debug) | |
2534 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2535 | recfilename); | |
2536 | ||
2537 | /* Open the output file. */ | |
bef155c3 TT |
2538 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (recfilename)); |
2539 | ||
2540 | /* Arrange to remove the output file on failure. */ | |
2541 | gdb::unlinker unlink_file (recfilename); | |
d02ed0bb | 2542 | |
88d1aa9d MM |
2543 | /* Save the current record entry to "cur_record_full_list". */ |
2544 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2545 | |
2546 | /* Get the values of regcache and gdbarch. */ | |
2547 | regcache = get_current_regcache (); | |
ac7936df | 2548 | gdbarch = regcache->arch (); |
d02ed0bb MM |
2549 | |
2550 | /* Disable the GDB operation record. */ | |
07036511 TT |
2551 | scoped_restore restore_operation_disable |
2552 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
2553 | |
2554 | /* Reverse execute to the begin of record list. */ | |
2555 | while (1) | |
2556 | { | |
2557 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2558 | if (record_full_list == &record_full_first) |
dda83cd7 | 2559 | break; |
d02ed0bb | 2560 | |
88d1aa9d | 2561 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2562 | |
88d1aa9d | 2563 | if (record_full_list->prev) |
dda83cd7 | 2564 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
2565 | } |
2566 | ||
2567 | /* Compute the size needed for the extra bfd section. */ | |
2568 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2569 | for (record_full_list = record_full_first.next; record_full_list; |
2570 | record_full_list = record_full_list->next) | |
2571 | switch (record_full_list->type) | |
d02ed0bb | 2572 | { |
88d1aa9d | 2573 | case record_full_end: |
d02ed0bb MM |
2574 | save_size += 1 + 4 + 4; |
2575 | break; | |
88d1aa9d MM |
2576 | case record_full_reg: |
2577 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2578 | break; |
88d1aa9d MM |
2579 | case record_full_mem: |
2580 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2581 | break; |
2582 | } | |
2583 | ||
2584 | /* Make the new bfd section. */ | |
bef155c3 | 2585 | osec = bfd_make_section_anyway_with_flags (obfd.get (), "precord", |
dda83cd7 SM |
2586 | SEC_HAS_CONTENTS |
2587 | | SEC_READONLY); | |
d02ed0bb MM |
2588 | if (osec == NULL) |
2589 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2590 | recfilename, | |
dda83cd7 | 2591 | bfd_errmsg (bfd_get_error ())); |
fd361982 AM |
2592 | bfd_set_section_size (osec, save_size); |
2593 | bfd_set_section_vma (osec, 0); | |
2594 | bfd_set_section_alignment (osec, 0); | |
d02ed0bb MM |
2595 | |
2596 | /* Save corefile state. */ | |
bef155c3 | 2597 | write_gcore_file (obfd.get ()); |
d02ed0bb MM |
2598 | |
2599 | /* Write out the record log. */ | |
2600 | /* Write the magic code. */ | |
88d1aa9d | 2601 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2602 | if (record_debug) |
2603 | fprintf_unfiltered (gdb_stdlog, | |
2604 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2605 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb | 2606 | phex_nz (magic, 4)); |
bef155c3 | 2607 | bfdcore_write (obfd.get (), osec, &magic, sizeof (magic), &bfd_offset); |
d02ed0bb MM |
2608 | |
2609 | /* Save the entries to recfd and forward execute to the end of | |
2610 | record list. */ | |
88d1aa9d | 2611 | record_full_list = &record_full_first; |
d02ed0bb MM |
2612 | while (1) |
2613 | { | |
2614 | /* Save entry. */ | |
88d1aa9d | 2615 | if (record_full_list != &record_full_first) |
dda83cd7 | 2616 | { |
d02ed0bb MM |
2617 | uint8_t type; |
2618 | uint32_t regnum, len, signal, count; | |
dda83cd7 | 2619 | uint64_t addr; |
d02ed0bb | 2620 | |
88d1aa9d | 2621 | type = record_full_list->type; |
dda83cd7 | 2622 | bfdcore_write (obfd.get (), osec, &type, sizeof (type), &bfd_offset); |
d02ed0bb | 2623 | |
dda83cd7 SM |
2624 | switch (record_full_list->type) |
2625 | { | |
2626 | case record_full_reg: /* reg */ | |
d02ed0bb MM |
2627 | if (record_debug) |
2628 | fprintf_unfiltered (gdb_stdlog, | |
2629 | " Writing register %d (1 " | |
2630 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2631 | record_full_list->u.reg.num, |
d02ed0bb | 2632 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2633 | record_full_list->u.reg.len); |
d02ed0bb | 2634 | |
dda83cd7 SM |
2635 | /* Write regnum. */ |
2636 | regnum = netorder32 (record_full_list->u.reg.num); | |
2637 | bfdcore_write (obfd.get (), osec, ®num, | |
d02ed0bb MM |
2638 | sizeof (regnum), &bfd_offset); |
2639 | ||
dda83cd7 SM |
2640 | /* Write regval. */ |
2641 | bfdcore_write (obfd.get (), osec, | |
88d1aa9d MM |
2642 | record_full_get_loc (record_full_list), |
2643 | record_full_list->u.reg.len, &bfd_offset); | |
dda83cd7 | 2644 | break; |
d02ed0bb | 2645 | |
dda83cd7 | 2646 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2647 | if (record_debug) |
2648 | fprintf_unfiltered (gdb_stdlog, | |
2649 | " Writing memory %s (1 plus " | |
2650 | "%lu plus %lu plus %d bytes)\n", | |
2651 | paddress (gdbarch, | |
88d1aa9d | 2652 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2653 | (unsigned long) sizeof (addr), |
2654 | (unsigned long) sizeof (len), | |
88d1aa9d | 2655 | record_full_list->u.mem.len); |
d02ed0bb MM |
2656 | |
2657 | /* Write memlen. */ | |
88d1aa9d | 2658 | len = netorder32 (record_full_list->u.mem.len); |
bef155c3 TT |
2659 | bfdcore_write (obfd.get (), osec, &len, sizeof (len), |
2660 | &bfd_offset); | |
d02ed0bb MM |
2661 | |
2662 | /* Write memaddr. */ | |
88d1aa9d | 2663 | addr = netorder64 (record_full_list->u.mem.addr); |
bef155c3 | 2664 | bfdcore_write (obfd.get (), osec, &addr, |
d02ed0bb MM |
2665 | sizeof (addr), &bfd_offset); |
2666 | ||
2667 | /* Write memval. */ | |
bef155c3 | 2668 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2669 | record_full_get_loc (record_full_list), |
2670 | record_full_list->u.mem.len, &bfd_offset); | |
dda83cd7 | 2671 | break; |
d02ed0bb | 2672 | |
dda83cd7 | 2673 | case record_full_end: |
d02ed0bb MM |
2674 | if (record_debug) |
2675 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2676 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2677 | "%lu + %lu bytes)\n", |
2678 | (unsigned long) sizeof (signal), | |
2679 | (unsigned long) sizeof (count)); | |
2680 | /* Write signal value. */ | |
88d1aa9d | 2681 | signal = netorder32 (record_full_list->u.end.sigval); |
bef155c3 | 2682 | bfdcore_write (obfd.get (), osec, &signal, |
d02ed0bb MM |
2683 | sizeof (signal), &bfd_offset); |
2684 | ||
2685 | /* Write insn count. */ | |
88d1aa9d | 2686 | count = netorder32 (record_full_list->u.end.insn_num); |
bef155c3 | 2687 | bfdcore_write (obfd.get (), osec, &count, |
d02ed0bb | 2688 | sizeof (count), &bfd_offset); |
dda83cd7 SM |
2689 | break; |
2690 | } | |
2691 | } | |
d02ed0bb MM |
2692 | |
2693 | /* Execute entry. */ | |
88d1aa9d | 2694 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2695 | |
88d1aa9d | 2696 | if (record_full_list->next) |
dda83cd7 | 2697 | record_full_list = record_full_list->next; |
d02ed0bb | 2698 | else |
dda83cd7 | 2699 | break; |
d02ed0bb MM |
2700 | } |
2701 | ||
88d1aa9d | 2702 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2703 | while (1) |
2704 | { | |
2705 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2706 | if (record_full_list == cur_record_full_list) |
dda83cd7 | 2707 | break; |
d02ed0bb | 2708 | |
88d1aa9d | 2709 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2710 | |
88d1aa9d | 2711 | if (record_full_list->prev) |
dda83cd7 | 2712 | record_full_list = record_full_list->prev; |
d02ed0bb MM |
2713 | } |
2714 | ||
bef155c3 | 2715 | unlink_file.keep (); |
d02ed0bb MM |
2716 | |
2717 | /* Succeeded. */ | |
2718 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2719 | recfilename); | |
2720 | } | |
2721 | ||
88d1aa9d | 2722 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2723 | depending on DIR) to the given entry, changing the program state |
2724 | correspondingly. */ | |
2725 | ||
2726 | static void | |
88d1aa9d MM |
2727 | record_full_goto_insn (struct record_full_entry *entry, |
2728 | enum exec_direction_kind dir) | |
d02ed0bb | 2729 | { |
07036511 TT |
2730 | scoped_restore restore_operation_disable |
2731 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 2732 | struct regcache *regcache = get_current_regcache (); |
ac7936df | 2733 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb MM |
2734 | |
2735 | /* Assume everything is valid: we will hit the entry, | |
2736 | and we will not hit the end of the recording. */ | |
2737 | ||
2738 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2739 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2740 | |
2741 | do | |
2742 | { | |
88d1aa9d | 2743 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2744 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2745 | record_full_list = record_full_list->prev; |
d02ed0bb | 2746 | else |
88d1aa9d MM |
2747 | record_full_list = record_full_list->next; |
2748 | } while (record_full_list != entry); | |
d02ed0bb MM |
2749 | } |
2750 | ||
2751 | /* Alias for "target record-full". */ | |
2752 | ||
2753 | static void | |
981a3fb3 | 2754 | cmd_record_full_start (const char *args, int from_tty) |
d02ed0bb | 2755 | { |
95a6b0a1 | 2756 | execute_command ("target record-full", from_tty); |
d02ed0bb MM |
2757 | } |
2758 | ||
2759 | static void | |
eb4c3f4a | 2760 | set_record_full_insn_max_num (const char *args, int from_tty, |
88d1aa9d | 2761 | struct cmd_list_element *c) |
d02ed0bb | 2762 | { |
7ee70bf5 | 2763 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2764 | { |
88d1aa9d MM |
2765 | /* Count down record_full_insn_num while releasing records from list. */ |
2766 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2767 | { |
dda83cd7 SM |
2768 | record_full_list_release_first (); |
2769 | record_full_insn_num--; | |
d02ed0bb MM |
2770 | } |
2771 | } | |
2772 | } | |
2773 | ||
6c265988 | 2774 | void _initialize_record_full (); |
d02ed0bb | 2775 | void |
6c265988 | 2776 | _initialize_record_full () |
d02ed0bb MM |
2777 | { |
2778 | struct cmd_list_element *c; | |
2779 | ||
88d1aa9d MM |
2780 | /* Init record_full_first. */ |
2781 | record_full_first.prev = NULL; | |
2782 | record_full_first.next = NULL; | |
2783 | record_full_first.type = record_full_end; | |
d02ed0bb | 2784 | |
d9f719f1 PA |
2785 | add_target (record_full_target_info, record_full_open); |
2786 | add_deprecated_target_alias (record_full_target_info, "record"); | |
2787 | add_target (record_full_core_target_info, record_full_open); | |
d02ed0bb | 2788 | |
88d1aa9d | 2789 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb | 2790 | _("Start full execution recording."), &record_full_cmdlist, |
2f822da5 | 2791 | 0, &record_cmdlist); |
d02ed0bb | 2792 | |
5e84b7ee SM |
2793 | cmd_list_element *record_full_restore_cmd |
2794 | = add_cmd ("restore", class_obscure, cmd_record_full_restore, | |
d02ed0bb MM |
2795 | _("Restore the execution log from a file.\n\ |
2796 | Argument is filename. File must be created with 'record save'."), | |
2797 | &record_full_cmdlist); | |
5e84b7ee | 2798 | set_cmd_completer (record_full_restore_cmd, filename_completer); |
d02ed0bb MM |
2799 | |
2800 | /* Deprecate the old version without "full" prefix. */ | |
5e84b7ee | 2801 | c = add_alias_cmd ("restore", record_full_restore_cmd, class_obscure, 1, |
d02ed0bb MM |
2802 | &record_cmdlist); |
2803 | set_cmd_completer (c, filename_completer); | |
2804 | deprecate_cmd (c, "record full restore"); | |
2805 | ||
0743fc83 TT |
2806 | add_basic_prefix_cmd ("full", class_support, |
2807 | _("Set record options."), &set_record_full_cmdlist, | |
2f822da5 | 2808 | 0, &set_record_cmdlist); |
d02ed0bb | 2809 | |
0743fc83 TT |
2810 | add_show_prefix_cmd ("full", class_support, |
2811 | _("Show record options."), &show_record_full_cmdlist, | |
2f822da5 | 2812 | 0, &show_record_cmdlist); |
d02ed0bb MM |
2813 | |
2814 | /* Record instructions number limit command. */ | |
5e84b7ee SM |
2815 | set_show_commands set_record_full_stop_at_limit_cmds |
2816 | = add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
2817 | &record_full_stop_at_limit, _("\ | |
d02ed0bb MM |
2818 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2819 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2820 | _("Default is ON.\n\ | |
2821 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2822 | When OFF, if the record/replay buffer becomes full,\n\ | |
2823 | delete the oldest recorded instruction to make room for each new one."), | |
5e84b7ee SM |
2824 | NULL, NULL, |
2825 | &set_record_full_cmdlist, | |
2826 | &show_record_full_cmdlist); | |
d02ed0bb | 2827 | |
5e84b7ee SM |
2828 | c = add_alias_cmd ("stop-at-limit", |
2829 | set_record_full_stop_at_limit_cmds.set, no_class, 1, | |
d02ed0bb MM |
2830 | &set_record_cmdlist); |
2831 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2832 | ||
5e84b7ee SM |
2833 | c = add_alias_cmd ("stop-at-limit", |
2834 | set_record_full_stop_at_limit_cmds.show, no_class, 1, | |
d02ed0bb MM |
2835 | &show_record_cmdlist); |
2836 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2837 | ||
5e84b7ee SM |
2838 | set_show_commands record_full_insn_number_max_cmds |
2839 | = add_setshow_uinteger_cmd ("insn-number-max", no_class, | |
2840 | &record_full_insn_max_num, | |
2841 | _("Set record/replay buffer limit."), | |
2842 | _("Show record/replay buffer limit."), _("\ | |
d02ed0bb | 2843 | Set the maximum number of instructions to be stored in the\n\ |
f81d1120 PA |
2844 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2845 | limit. Default is 200000."), | |
5e84b7ee SM |
2846 | set_record_full_insn_max_num, |
2847 | NULL, &set_record_full_cmdlist, | |
2848 | &show_record_full_cmdlist); | |
d02ed0bb | 2849 | |
5e84b7ee SM |
2850 | c = add_alias_cmd ("insn-number-max", record_full_insn_number_max_cmds.set, |
2851 | no_class, 1, &set_record_cmdlist); | |
d02ed0bb MM |
2852 | deprecate_cmd (c, "set record full insn-number-max"); |
2853 | ||
5e84b7ee SM |
2854 | c = add_alias_cmd ("insn-number-max", record_full_insn_number_max_cmds.show, |
2855 | no_class, 1, &show_record_cmdlist); | |
d02ed0bb MM |
2856 | deprecate_cmd (c, "show record full insn-number-max"); |
2857 | ||
5e84b7ee SM |
2858 | set_show_commands record_full_memory_query_cmds |
2859 | = add_setshow_boolean_cmd ("memory-query", no_class, | |
2860 | &record_full_memory_query, _("\ | |
d02ed0bb | 2861 | Set whether query if PREC cannot record memory change of next instruction."), |
5e84b7ee | 2862 | _("\ |
d02ed0bb | 2863 | Show whether query if PREC cannot record memory change of next instruction."), |
5e84b7ee | 2864 | _("\ |
d02ed0bb MM |
2865 | Default is OFF.\n\ |
2866 | When ON, query if PREC cannot record memory change of next instruction."), | |
5e84b7ee SM |
2867 | NULL, NULL, |
2868 | &set_record_full_cmdlist, | |
2869 | &show_record_full_cmdlist); | |
d02ed0bb | 2870 | |
5e84b7ee SM |
2871 | c = add_alias_cmd ("memory-query", record_full_memory_query_cmds.set, |
2872 | no_class, 1, &set_record_cmdlist); | |
d02ed0bb MM |
2873 | deprecate_cmd (c, "set record full memory-query"); |
2874 | ||
5e84b7ee SM |
2875 | c = add_alias_cmd ("memory-query", record_full_memory_query_cmds.show, |
2876 | no_class, 1,&show_record_cmdlist); | |
d02ed0bb MM |
2877 | deprecate_cmd (c, "show record full memory-query"); |
2878 | } |