Commit | Line | Data |
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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
32d0add0 | 3 | Copyright (C) 2013-2015 Free Software Foundation, Inc. |
afedecd3 MM |
4 | |
5 | Contributed by Intel Corp. <markus.t.metzger@intel.com> | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "record.h" | |
24 | #include "gdbthread.h" | |
25 | #include "target.h" | |
26 | #include "gdbcmd.h" | |
27 | #include "disasm.h" | |
28 | #include "observer.h" | |
afedecd3 MM |
29 | #include "cli/cli-utils.h" |
30 | #include "source.h" | |
31 | #include "ui-out.h" | |
32 | #include "symtab.h" | |
33 | #include "filenames.h" | |
1f3ef581 | 34 | #include "regcache.h" |
cecac1ab | 35 | #include "frame-unwind.h" |
0b722aec | 36 | #include "hashtab.h" |
45741a9c | 37 | #include "infrun.h" |
70ad5bff MM |
38 | #include "event-loop.h" |
39 | #include "inf-loop.h" | |
afedecd3 MM |
40 | |
41 | /* The target_ops of record-btrace. */ | |
42 | static struct target_ops record_btrace_ops; | |
43 | ||
44 | /* A new thread observer enabling branch tracing for the new thread. */ | |
45 | static struct observer *record_btrace_thread_observer; | |
46 | ||
67b5c0c1 MM |
47 | /* Memory access types used in set/show record btrace replay-memory-access. */ |
48 | static const char replay_memory_access_read_only[] = "read-only"; | |
49 | static const char replay_memory_access_read_write[] = "read-write"; | |
50 | static const char *const replay_memory_access_types[] = | |
51 | { | |
52 | replay_memory_access_read_only, | |
53 | replay_memory_access_read_write, | |
54 | NULL | |
55 | }; | |
56 | ||
57 | /* The currently allowed replay memory access type. */ | |
58 | static const char *replay_memory_access = replay_memory_access_read_only; | |
59 | ||
60 | /* Command lists for "set/show record btrace". */ | |
61 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
62 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
633785ff | 63 | |
70ad5bff MM |
64 | /* The execution direction of the last resume we got. See record-full.c. */ |
65 | static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD; | |
66 | ||
67 | /* The async event handler for reverse/replay execution. */ | |
68 | static struct async_event_handler *record_btrace_async_inferior_event_handler; | |
69 | ||
aef92902 MM |
70 | /* A flag indicating that we are currently generating a core file. */ |
71 | static int record_btrace_generating_corefile; | |
72 | ||
f4abbc16 MM |
73 | /* The current branch trace configuration. */ |
74 | static struct btrace_config record_btrace_conf; | |
75 | ||
76 | /* Command list for "record btrace". */ | |
77 | static struct cmd_list_element *record_btrace_cmdlist; | |
78 | ||
d33501a5 MM |
79 | /* Command lists for "set/show record btrace bts". */ |
80 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
81 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
82 | ||
afedecd3 MM |
83 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
84 | ambiguities when used in if statements. */ | |
85 | ||
86 | #define DEBUG(msg, args...) \ | |
87 | do \ | |
88 | { \ | |
89 | if (record_debug != 0) \ | |
90 | fprintf_unfiltered (gdb_stdlog, \ | |
91 | "[record-btrace] " msg "\n", ##args); \ | |
92 | } \ | |
93 | while (0) | |
94 | ||
95 | ||
96 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 97 | thread_info. |
afedecd3 MM |
98 | |
99 | Throws an error if there is no thread or no trace. This function never | |
100 | returns NULL. */ | |
101 | ||
066ce621 MM |
102 | static struct thread_info * |
103 | require_btrace_thread (void) | |
afedecd3 MM |
104 | { |
105 | struct thread_info *tp; | |
afedecd3 MM |
106 | |
107 | DEBUG ("require"); | |
108 | ||
109 | tp = find_thread_ptid (inferior_ptid); | |
110 | if (tp == NULL) | |
111 | error (_("No thread.")); | |
112 | ||
113 | btrace_fetch (tp); | |
114 | ||
6e07b1d2 | 115 | if (btrace_is_empty (tp)) |
afedecd3 MM |
116 | error (_("No trace.")); |
117 | ||
066ce621 MM |
118 | return tp; |
119 | } | |
120 | ||
121 | /* Update the branch trace for the current thread and return a pointer to its | |
122 | branch trace information struct. | |
123 | ||
124 | Throws an error if there is no thread or no trace. This function never | |
125 | returns NULL. */ | |
126 | ||
127 | static struct btrace_thread_info * | |
128 | require_btrace (void) | |
129 | { | |
130 | struct thread_info *tp; | |
131 | ||
132 | tp = require_btrace_thread (); | |
133 | ||
134 | return &tp->btrace; | |
afedecd3 MM |
135 | } |
136 | ||
137 | /* Enable branch tracing for one thread. Warn on errors. */ | |
138 | ||
139 | static void | |
140 | record_btrace_enable_warn (struct thread_info *tp) | |
141 | { | |
492d29ea PA |
142 | TRY |
143 | { | |
144 | btrace_enable (tp, &record_btrace_conf); | |
145 | } | |
146 | CATCH (error, RETURN_MASK_ERROR) | |
147 | { | |
148 | warning ("%s", error.message); | |
149 | } | |
150 | END_CATCH | |
afedecd3 MM |
151 | } |
152 | ||
153 | /* Callback function to disable branch tracing for one thread. */ | |
154 | ||
155 | static void | |
156 | record_btrace_disable_callback (void *arg) | |
157 | { | |
158 | struct thread_info *tp; | |
159 | ||
160 | tp = arg; | |
161 | ||
162 | btrace_disable (tp); | |
163 | } | |
164 | ||
165 | /* Enable automatic tracing of new threads. */ | |
166 | ||
167 | static void | |
168 | record_btrace_auto_enable (void) | |
169 | { | |
170 | DEBUG ("attach thread observer"); | |
171 | ||
172 | record_btrace_thread_observer | |
173 | = observer_attach_new_thread (record_btrace_enable_warn); | |
174 | } | |
175 | ||
176 | /* Disable automatic tracing of new threads. */ | |
177 | ||
178 | static void | |
179 | record_btrace_auto_disable (void) | |
180 | { | |
181 | /* The observer may have been detached, already. */ | |
182 | if (record_btrace_thread_observer == NULL) | |
183 | return; | |
184 | ||
185 | DEBUG ("detach thread observer"); | |
186 | ||
187 | observer_detach_new_thread (record_btrace_thread_observer); | |
188 | record_btrace_thread_observer = NULL; | |
189 | } | |
190 | ||
70ad5bff MM |
191 | /* The record-btrace async event handler function. */ |
192 | ||
193 | static void | |
194 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
195 | { | |
196 | inferior_event_handler (INF_REG_EVENT, NULL); | |
197 | } | |
198 | ||
afedecd3 MM |
199 | /* The to_open method of target record-btrace. */ |
200 | ||
201 | static void | |
014f9477 | 202 | record_btrace_open (const char *args, int from_tty) |
afedecd3 MM |
203 | { |
204 | struct cleanup *disable_chain; | |
205 | struct thread_info *tp; | |
206 | ||
207 | DEBUG ("open"); | |
208 | ||
8213266a | 209 | record_preopen (); |
afedecd3 MM |
210 | |
211 | if (!target_has_execution) | |
212 | error (_("The program is not being run.")); | |
213 | ||
52834460 MM |
214 | if (non_stop) |
215 | error (_("Record btrace can't debug inferior in non-stop mode.")); | |
216 | ||
afedecd3 MM |
217 | gdb_assert (record_btrace_thread_observer == NULL); |
218 | ||
219 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 220 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
221 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->num)) |
222 | { | |
f4abbc16 | 223 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
224 | |
225 | make_cleanup (record_btrace_disable_callback, tp); | |
226 | } | |
227 | ||
228 | record_btrace_auto_enable (); | |
229 | ||
230 | push_target (&record_btrace_ops); | |
231 | ||
70ad5bff MM |
232 | record_btrace_async_inferior_event_handler |
233 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
234 | NULL); | |
aef92902 | 235 | record_btrace_generating_corefile = 0; |
70ad5bff | 236 | |
afedecd3 MM |
237 | observer_notify_record_changed (current_inferior (), 1); |
238 | ||
239 | discard_cleanups (disable_chain); | |
240 | } | |
241 | ||
242 | /* The to_stop_recording method of target record-btrace. */ | |
243 | ||
244 | static void | |
c6cd7c02 | 245 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
246 | { |
247 | struct thread_info *tp; | |
248 | ||
249 | DEBUG ("stop recording"); | |
250 | ||
251 | record_btrace_auto_disable (); | |
252 | ||
034f788c | 253 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
254 | if (tp->btrace.target != NULL) |
255 | btrace_disable (tp); | |
256 | } | |
257 | ||
258 | /* The to_close method of target record-btrace. */ | |
259 | ||
260 | static void | |
de90e03d | 261 | record_btrace_close (struct target_ops *self) |
afedecd3 | 262 | { |
568e808b MM |
263 | struct thread_info *tp; |
264 | ||
70ad5bff MM |
265 | if (record_btrace_async_inferior_event_handler != NULL) |
266 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
267 | ||
99c819ee MM |
268 | /* Make sure automatic recording gets disabled even if we did not stop |
269 | recording before closing the record-btrace target. */ | |
270 | record_btrace_auto_disable (); | |
271 | ||
568e808b MM |
272 | /* We should have already stopped recording. |
273 | Tear down btrace in case we have not. */ | |
034f788c | 274 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 275 | btrace_teardown (tp); |
afedecd3 MM |
276 | } |
277 | ||
b7d2e916 PA |
278 | /* The to_async method of target record-btrace. */ |
279 | ||
280 | static void | |
281 | record_btrace_async (struct target_ops *ops, | |
282 | void (*callback) (enum inferior_event_type event_type, | |
283 | void *context), | |
284 | void *context) | |
285 | { | |
286 | if (callback != NULL) | |
287 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
288 | else | |
289 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
290 | ||
291 | ops->beneath->to_async (ops->beneath, callback, context); | |
292 | } | |
293 | ||
d33501a5 MM |
294 | /* Adjusts the size and returns a human readable size suffix. */ |
295 | ||
296 | static const char * | |
297 | record_btrace_adjust_size (unsigned int *size) | |
298 | { | |
299 | unsigned int sz; | |
300 | ||
301 | sz = *size; | |
302 | ||
303 | if ((sz & ((1u << 30) - 1)) == 0) | |
304 | { | |
305 | *size = sz >> 30; | |
306 | return "GB"; | |
307 | } | |
308 | else if ((sz & ((1u << 20) - 1)) == 0) | |
309 | { | |
310 | *size = sz >> 20; | |
311 | return "MB"; | |
312 | } | |
313 | else if ((sz & ((1u << 10) - 1)) == 0) | |
314 | { | |
315 | *size = sz >> 10; | |
316 | return "kB"; | |
317 | } | |
318 | else | |
319 | return ""; | |
320 | } | |
321 | ||
322 | /* Print a BTS configuration. */ | |
323 | ||
324 | static void | |
325 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
326 | { | |
327 | const char *suffix; | |
328 | unsigned int size; | |
329 | ||
330 | size = conf->size; | |
331 | if (size > 0) | |
332 | { | |
333 | suffix = record_btrace_adjust_size (&size); | |
334 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
335 | } | |
336 | } | |
337 | ||
338 | /* Print a branch tracing configuration. */ | |
339 | ||
340 | static void | |
341 | record_btrace_print_conf (const struct btrace_config *conf) | |
342 | { | |
343 | printf_unfiltered (_("Recording format: %s.\n"), | |
344 | btrace_format_string (conf->format)); | |
345 | ||
346 | switch (conf->format) | |
347 | { | |
348 | case BTRACE_FORMAT_NONE: | |
349 | return; | |
350 | ||
351 | case BTRACE_FORMAT_BTS: | |
352 | record_btrace_print_bts_conf (&conf->bts); | |
353 | return; | |
354 | } | |
355 | ||
356 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
357 | } | |
358 | ||
afedecd3 MM |
359 | /* The to_info_record method of target record-btrace. */ |
360 | ||
361 | static void | |
630d6a4a | 362 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
363 | { |
364 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 365 | const struct btrace_config *conf; |
afedecd3 | 366 | struct thread_info *tp; |
31fd9caa | 367 | unsigned int insns, calls, gaps; |
afedecd3 MM |
368 | |
369 | DEBUG ("info"); | |
370 | ||
371 | tp = find_thread_ptid (inferior_ptid); | |
372 | if (tp == NULL) | |
373 | error (_("No thread.")); | |
374 | ||
f4abbc16 MM |
375 | btinfo = &tp->btrace; |
376 | ||
377 | conf = btrace_conf (btinfo); | |
378 | if (conf != NULL) | |
d33501a5 | 379 | record_btrace_print_conf (conf); |
f4abbc16 | 380 | |
afedecd3 MM |
381 | btrace_fetch (tp); |
382 | ||
23a7fe75 MM |
383 | insns = 0; |
384 | calls = 0; | |
31fd9caa | 385 | gaps = 0; |
23a7fe75 | 386 | |
6e07b1d2 | 387 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
388 | { |
389 | struct btrace_call_iterator call; | |
390 | struct btrace_insn_iterator insn; | |
391 | ||
392 | btrace_call_end (&call, btinfo); | |
393 | btrace_call_prev (&call, 1); | |
5de9129b | 394 | calls = btrace_call_number (&call); |
23a7fe75 MM |
395 | |
396 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 397 | |
5de9129b | 398 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
399 | if (insns != 0) |
400 | { | |
401 | /* The last instruction does not really belong to the trace. */ | |
402 | insns -= 1; | |
403 | } | |
404 | else | |
405 | { | |
406 | unsigned int steps; | |
407 | ||
408 | /* Skip gaps at the end. */ | |
409 | do | |
410 | { | |
411 | steps = btrace_insn_prev (&insn, 1); | |
412 | if (steps == 0) | |
413 | break; | |
414 | ||
415 | insns = btrace_insn_number (&insn); | |
416 | } | |
417 | while (insns == 0); | |
418 | } | |
419 | ||
420 | gaps = btinfo->ngaps; | |
23a7fe75 | 421 | } |
afedecd3 | 422 | |
31fd9caa MM |
423 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
424 | "for thread %d (%s).\n"), insns, calls, gaps, | |
425 | tp->num, target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
426 | |
427 | if (btrace_is_replaying (tp)) | |
428 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
429 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
430 | } |
431 | ||
31fd9caa MM |
432 | /* Print a decode error. */ |
433 | ||
434 | static void | |
435 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
436 | enum btrace_format format) | |
437 | { | |
438 | const char *errstr; | |
439 | int is_error; | |
440 | ||
441 | errstr = _("unknown"); | |
442 | is_error = 1; | |
443 | ||
444 | switch (format) | |
445 | { | |
446 | default: | |
447 | break; | |
448 | ||
449 | case BTRACE_FORMAT_BTS: | |
450 | switch (errcode) | |
451 | { | |
452 | default: | |
453 | break; | |
454 | ||
455 | case BDE_BTS_OVERFLOW: | |
456 | errstr = _("instruction overflow"); | |
457 | break; | |
458 | ||
459 | case BDE_BTS_INSN_SIZE: | |
460 | errstr = _("unknown instruction"); | |
461 | break; | |
462 | } | |
463 | break; | |
464 | } | |
465 | ||
466 | ui_out_text (uiout, _("[")); | |
467 | if (is_error) | |
468 | { | |
469 | ui_out_text (uiout, _("decode error (")); | |
470 | ui_out_field_int (uiout, "errcode", errcode); | |
471 | ui_out_text (uiout, _("): ")); | |
472 | } | |
473 | ui_out_text (uiout, errstr); | |
474 | ui_out_text (uiout, _("]\n")); | |
475 | } | |
476 | ||
afedecd3 MM |
477 | /* Print an unsigned int. */ |
478 | ||
479 | static void | |
480 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
481 | { | |
482 | ui_out_field_fmt (uiout, fld, "%u", val); | |
483 | } | |
484 | ||
485 | /* Disassemble a section of the recorded instruction trace. */ | |
486 | ||
487 | static void | |
23a7fe75 | 488 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 489 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
490 | const struct btrace_insn_iterator *begin, |
491 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 MM |
492 | { |
493 | struct gdbarch *gdbarch; | |
23a7fe75 | 494 | struct btrace_insn_iterator it; |
afedecd3 | 495 | |
23a7fe75 MM |
496 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
497 | btrace_insn_number (end)); | |
afedecd3 MM |
498 | |
499 | gdbarch = target_gdbarch (); | |
500 | ||
23a7fe75 | 501 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 502 | { |
23a7fe75 MM |
503 | const struct btrace_insn *insn; |
504 | ||
505 | insn = btrace_insn_get (&it); | |
506 | ||
31fd9caa MM |
507 | /* A NULL instruction indicates a gap in the trace. */ |
508 | if (insn == NULL) | |
509 | { | |
510 | const struct btrace_config *conf; | |
511 | ||
512 | conf = btrace_conf (btinfo); | |
afedecd3 | 513 | |
31fd9caa MM |
514 | /* We have trace so we must have a configuration. */ |
515 | gdb_assert (conf != NULL); | |
516 | ||
517 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
518 | conf->format); | |
519 | } | |
520 | else | |
521 | { | |
522 | /* Print the instruction index. */ | |
523 | ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); | |
524 | ui_out_text (uiout, "\t"); | |
525 | ||
526 | /* Disassembly with '/m' flag may not produce the expected result. | |
527 | See PR gdb/11833. */ | |
528 | gdb_disassembly (gdbarch, uiout, NULL, flags, 1, insn->pc, | |
529 | insn->pc + 1); | |
530 | } | |
afedecd3 MM |
531 | } |
532 | } | |
533 | ||
534 | /* The to_insn_history method of target record-btrace. */ | |
535 | ||
536 | static void | |
7a6c5609 | 537 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
538 | { |
539 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
540 | struct btrace_insn_history *history; |
541 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
542 | struct cleanup *uiout_cleanup; |
543 | struct ui_out *uiout; | |
23a7fe75 | 544 | unsigned int context, covered; |
afedecd3 MM |
545 | |
546 | uiout = current_uiout; | |
547 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
548 | "insn history"); | |
afedecd3 | 549 | context = abs (size); |
afedecd3 MM |
550 | if (context == 0) |
551 | error (_("Bad record instruction-history-size.")); | |
552 | ||
23a7fe75 MM |
553 | btinfo = require_btrace (); |
554 | history = btinfo->insn_history; | |
555 | if (history == NULL) | |
afedecd3 | 556 | { |
07bbe694 | 557 | struct btrace_insn_iterator *replay; |
afedecd3 | 558 | |
23a7fe75 | 559 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 560 | |
07bbe694 MM |
561 | /* If we're replaying, we start at the replay position. Otherwise, we |
562 | start at the tail of the trace. */ | |
563 | replay = btinfo->replay; | |
564 | if (replay != NULL) | |
565 | begin = *replay; | |
566 | else | |
567 | btrace_insn_end (&begin, btinfo); | |
568 | ||
569 | /* We start from here and expand in the requested direction. Then we | |
570 | expand in the other direction, as well, to fill up any remaining | |
571 | context. */ | |
572 | end = begin; | |
573 | if (size < 0) | |
574 | { | |
575 | /* We want the current position covered, as well. */ | |
576 | covered = btrace_insn_next (&end, 1); | |
577 | covered += btrace_insn_prev (&begin, context - covered); | |
578 | covered += btrace_insn_next (&end, context - covered); | |
579 | } | |
580 | else | |
581 | { | |
582 | covered = btrace_insn_next (&end, context); | |
583 | covered += btrace_insn_prev (&begin, context - covered); | |
584 | } | |
afedecd3 MM |
585 | } |
586 | else | |
587 | { | |
23a7fe75 MM |
588 | begin = history->begin; |
589 | end = history->end; | |
afedecd3 | 590 | |
23a7fe75 MM |
591 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
592 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 593 | |
23a7fe75 MM |
594 | if (size < 0) |
595 | { | |
596 | end = begin; | |
597 | covered = btrace_insn_prev (&begin, context); | |
598 | } | |
599 | else | |
600 | { | |
601 | begin = end; | |
602 | covered = btrace_insn_next (&end, context); | |
603 | } | |
afedecd3 MM |
604 | } |
605 | ||
23a7fe75 | 606 | if (covered > 0) |
31fd9caa | 607 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
608 | else |
609 | { | |
610 | if (size < 0) | |
611 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
612 | else | |
613 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
614 | } | |
afedecd3 | 615 | |
23a7fe75 | 616 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
617 | do_cleanups (uiout_cleanup); |
618 | } | |
619 | ||
620 | /* The to_insn_history_range method of target record-btrace. */ | |
621 | ||
622 | static void | |
4e99c6b7 TT |
623 | record_btrace_insn_history_range (struct target_ops *self, |
624 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
625 | { |
626 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
627 | struct btrace_insn_history *history; |
628 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
629 | struct cleanup *uiout_cleanup; |
630 | struct ui_out *uiout; | |
23a7fe75 MM |
631 | unsigned int low, high; |
632 | int found; | |
afedecd3 MM |
633 | |
634 | uiout = current_uiout; | |
635 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
636 | "insn history"); | |
23a7fe75 MM |
637 | low = from; |
638 | high = to; | |
afedecd3 | 639 | |
23a7fe75 | 640 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
641 | |
642 | /* Check for wrap-arounds. */ | |
23a7fe75 | 643 | if (low != from || high != to) |
afedecd3 MM |
644 | error (_("Bad range.")); |
645 | ||
0688d04e | 646 | if (high < low) |
afedecd3 MM |
647 | error (_("Bad range.")); |
648 | ||
23a7fe75 | 649 | btinfo = require_btrace (); |
afedecd3 | 650 | |
23a7fe75 MM |
651 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
652 | if (found == 0) | |
653 | error (_("Range out of bounds.")); | |
afedecd3 | 654 | |
23a7fe75 MM |
655 | found = btrace_find_insn_by_number (&end, btinfo, high); |
656 | if (found == 0) | |
0688d04e MM |
657 | { |
658 | /* Silently truncate the range. */ | |
659 | btrace_insn_end (&end, btinfo); | |
660 | } | |
661 | else | |
662 | { | |
663 | /* We want both begin and end to be inclusive. */ | |
664 | btrace_insn_next (&end, 1); | |
665 | } | |
afedecd3 | 666 | |
31fd9caa | 667 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 668 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
669 | |
670 | do_cleanups (uiout_cleanup); | |
671 | } | |
672 | ||
673 | /* The to_insn_history_from method of target record-btrace. */ | |
674 | ||
675 | static void | |
9abc3ff3 TT |
676 | record_btrace_insn_history_from (struct target_ops *self, |
677 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
678 | { |
679 | ULONGEST begin, end, context; | |
680 | ||
681 | context = abs (size); | |
0688d04e MM |
682 | if (context == 0) |
683 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
684 | |
685 | if (size < 0) | |
686 | { | |
687 | end = from; | |
688 | ||
689 | if (from < context) | |
690 | begin = 0; | |
691 | else | |
0688d04e | 692 | begin = from - context + 1; |
afedecd3 MM |
693 | } |
694 | else | |
695 | { | |
696 | begin = from; | |
0688d04e | 697 | end = from + context - 1; |
afedecd3 MM |
698 | |
699 | /* Check for wrap-around. */ | |
700 | if (end < begin) | |
701 | end = ULONGEST_MAX; | |
702 | } | |
703 | ||
4e99c6b7 | 704 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
705 | } |
706 | ||
707 | /* Print the instruction number range for a function call history line. */ | |
708 | ||
709 | static void | |
23a7fe75 MM |
710 | btrace_call_history_insn_range (struct ui_out *uiout, |
711 | const struct btrace_function *bfun) | |
afedecd3 | 712 | { |
7acbe133 MM |
713 | unsigned int begin, end, size; |
714 | ||
715 | size = VEC_length (btrace_insn_s, bfun->insn); | |
716 | gdb_assert (size > 0); | |
afedecd3 | 717 | |
23a7fe75 | 718 | begin = bfun->insn_offset; |
7acbe133 | 719 | end = begin + size - 1; |
afedecd3 | 720 | |
23a7fe75 | 721 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 722 | ui_out_text (uiout, ","); |
23a7fe75 | 723 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
724 | } |
725 | ||
ce0dfbea MM |
726 | /* Compute the lowest and highest source line for the instructions in BFUN |
727 | and return them in PBEGIN and PEND. | |
728 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
729 | result from inlining or macro expansion. */ | |
730 | ||
731 | static void | |
732 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
733 | int *pbegin, int *pend) | |
734 | { | |
735 | struct btrace_insn *insn; | |
736 | struct symtab *symtab; | |
737 | struct symbol *sym; | |
738 | unsigned int idx; | |
739 | int begin, end; | |
740 | ||
741 | begin = INT_MAX; | |
742 | end = INT_MIN; | |
743 | ||
744 | sym = bfun->sym; | |
745 | if (sym == NULL) | |
746 | goto out; | |
747 | ||
748 | symtab = symbol_symtab (sym); | |
749 | ||
750 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
751 | { | |
752 | struct symtab_and_line sal; | |
753 | ||
754 | sal = find_pc_line (insn->pc, 0); | |
755 | if (sal.symtab != symtab || sal.line == 0) | |
756 | continue; | |
757 | ||
758 | begin = min (begin, sal.line); | |
759 | end = max (end, sal.line); | |
760 | } | |
761 | ||
762 | out: | |
763 | *pbegin = begin; | |
764 | *pend = end; | |
765 | } | |
766 | ||
afedecd3 MM |
767 | /* Print the source line information for a function call history line. */ |
768 | ||
769 | static void | |
23a7fe75 MM |
770 | btrace_call_history_src_line (struct ui_out *uiout, |
771 | const struct btrace_function *bfun) | |
afedecd3 MM |
772 | { |
773 | struct symbol *sym; | |
23a7fe75 | 774 | int begin, end; |
afedecd3 MM |
775 | |
776 | sym = bfun->sym; | |
777 | if (sym == NULL) | |
778 | return; | |
779 | ||
780 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 781 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 782 | |
ce0dfbea | 783 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 784 | if (end < begin) |
afedecd3 MM |
785 | return; |
786 | ||
787 | ui_out_text (uiout, ":"); | |
23a7fe75 | 788 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 789 | |
23a7fe75 | 790 | if (end == begin) |
afedecd3 MM |
791 | return; |
792 | ||
8710b709 | 793 | ui_out_text (uiout, ","); |
23a7fe75 | 794 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
795 | } |
796 | ||
0b722aec MM |
797 | /* Get the name of a branch trace function. */ |
798 | ||
799 | static const char * | |
800 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
801 | { | |
802 | struct minimal_symbol *msym; | |
803 | struct symbol *sym; | |
804 | ||
805 | if (bfun == NULL) | |
806 | return "??"; | |
807 | ||
808 | msym = bfun->msym; | |
809 | sym = bfun->sym; | |
810 | ||
811 | if (sym != NULL) | |
812 | return SYMBOL_PRINT_NAME (sym); | |
813 | else if (msym != NULL) | |
efd66ac6 | 814 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
815 | else |
816 | return "??"; | |
817 | } | |
818 | ||
afedecd3 MM |
819 | /* Disassemble a section of the recorded function trace. */ |
820 | ||
821 | static void | |
23a7fe75 | 822 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 823 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
824 | const struct btrace_call_iterator *begin, |
825 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
826 | enum record_print_flag flags) |
827 | { | |
23a7fe75 | 828 | struct btrace_call_iterator it; |
afedecd3 | 829 | |
23a7fe75 MM |
830 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
831 | btrace_call_number (end)); | |
afedecd3 | 832 | |
23a7fe75 | 833 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 834 | { |
23a7fe75 MM |
835 | const struct btrace_function *bfun; |
836 | struct minimal_symbol *msym; | |
837 | struct symbol *sym; | |
838 | ||
839 | bfun = btrace_call_get (&it); | |
23a7fe75 | 840 | sym = bfun->sym; |
0b722aec | 841 | msym = bfun->msym; |
23a7fe75 | 842 | |
afedecd3 | 843 | /* Print the function index. */ |
23a7fe75 | 844 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
845 | ui_out_text (uiout, "\t"); |
846 | ||
31fd9caa MM |
847 | /* Indicate gaps in the trace. */ |
848 | if (bfun->errcode != 0) | |
849 | { | |
850 | const struct btrace_config *conf; | |
851 | ||
852 | conf = btrace_conf (btinfo); | |
853 | ||
854 | /* We have trace so we must have a configuration. */ | |
855 | gdb_assert (conf != NULL); | |
856 | ||
857 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
858 | ||
859 | continue; | |
860 | } | |
861 | ||
8710b709 MM |
862 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
863 | { | |
864 | int level = bfun->level + btinfo->level, i; | |
865 | ||
866 | for (i = 0; i < level; ++i) | |
867 | ui_out_text (uiout, " "); | |
868 | } | |
869 | ||
870 | if (sym != NULL) | |
871 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
872 | else if (msym != NULL) | |
efd66ac6 | 873 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
874 | else if (!ui_out_is_mi_like_p (uiout)) |
875 | ui_out_field_string (uiout, "function", "??"); | |
876 | ||
1e038f67 | 877 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 878 | { |
8710b709 | 879 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 880 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
881 | } |
882 | ||
1e038f67 | 883 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 884 | { |
8710b709 | 885 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 886 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
887 | } |
888 | ||
afedecd3 MM |
889 | ui_out_text (uiout, "\n"); |
890 | } | |
891 | } | |
892 | ||
893 | /* The to_call_history method of target record-btrace. */ | |
894 | ||
895 | static void | |
5df2fcba | 896 | record_btrace_call_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
897 | { |
898 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
899 | struct btrace_call_history *history; |
900 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
901 | struct cleanup *uiout_cleanup; |
902 | struct ui_out *uiout; | |
23a7fe75 | 903 | unsigned int context, covered; |
afedecd3 MM |
904 | |
905 | uiout = current_uiout; | |
906 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
907 | "insn history"); | |
afedecd3 | 908 | context = abs (size); |
afedecd3 MM |
909 | if (context == 0) |
910 | error (_("Bad record function-call-history-size.")); | |
911 | ||
23a7fe75 MM |
912 | btinfo = require_btrace (); |
913 | history = btinfo->call_history; | |
914 | if (history == NULL) | |
afedecd3 | 915 | { |
07bbe694 | 916 | struct btrace_insn_iterator *replay; |
afedecd3 | 917 | |
23a7fe75 | 918 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 919 | |
07bbe694 MM |
920 | /* If we're replaying, we start at the replay position. Otherwise, we |
921 | start at the tail of the trace. */ | |
922 | replay = btinfo->replay; | |
923 | if (replay != NULL) | |
924 | { | |
925 | begin.function = replay->function; | |
926 | begin.btinfo = btinfo; | |
927 | } | |
928 | else | |
929 | btrace_call_end (&begin, btinfo); | |
930 | ||
931 | /* We start from here and expand in the requested direction. Then we | |
932 | expand in the other direction, as well, to fill up any remaining | |
933 | context. */ | |
934 | end = begin; | |
935 | if (size < 0) | |
936 | { | |
937 | /* We want the current position covered, as well. */ | |
938 | covered = btrace_call_next (&end, 1); | |
939 | covered += btrace_call_prev (&begin, context - covered); | |
940 | covered += btrace_call_next (&end, context - covered); | |
941 | } | |
942 | else | |
943 | { | |
944 | covered = btrace_call_next (&end, context); | |
945 | covered += btrace_call_prev (&begin, context- covered); | |
946 | } | |
afedecd3 MM |
947 | } |
948 | else | |
949 | { | |
23a7fe75 MM |
950 | begin = history->begin; |
951 | end = history->end; | |
afedecd3 | 952 | |
23a7fe75 MM |
953 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
954 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 955 | |
23a7fe75 MM |
956 | if (size < 0) |
957 | { | |
958 | end = begin; | |
959 | covered = btrace_call_prev (&begin, context); | |
960 | } | |
961 | else | |
962 | { | |
963 | begin = end; | |
964 | covered = btrace_call_next (&end, context); | |
965 | } | |
afedecd3 MM |
966 | } |
967 | ||
23a7fe75 | 968 | if (covered > 0) |
8710b709 | 969 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
970 | else |
971 | { | |
972 | if (size < 0) | |
973 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
974 | else | |
975 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
976 | } | |
afedecd3 | 977 | |
23a7fe75 | 978 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
979 | do_cleanups (uiout_cleanup); |
980 | } | |
981 | ||
982 | /* The to_call_history_range method of target record-btrace. */ | |
983 | ||
984 | static void | |
f0d960ea TT |
985 | record_btrace_call_history_range (struct target_ops *self, |
986 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
987 | { |
988 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
989 | struct btrace_call_history *history; |
990 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
991 | struct cleanup *uiout_cleanup; |
992 | struct ui_out *uiout; | |
23a7fe75 MM |
993 | unsigned int low, high; |
994 | int found; | |
afedecd3 MM |
995 | |
996 | uiout = current_uiout; | |
997 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
998 | "func history"); | |
23a7fe75 MM |
999 | low = from; |
1000 | high = to; | |
afedecd3 | 1001 | |
23a7fe75 | 1002 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
1003 | |
1004 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1005 | if (low != from || high != to) |
afedecd3 MM |
1006 | error (_("Bad range.")); |
1007 | ||
0688d04e | 1008 | if (high < low) |
afedecd3 MM |
1009 | error (_("Bad range.")); |
1010 | ||
23a7fe75 | 1011 | btinfo = require_btrace (); |
afedecd3 | 1012 | |
23a7fe75 MM |
1013 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1014 | if (found == 0) | |
1015 | error (_("Range out of bounds.")); | |
afedecd3 | 1016 | |
23a7fe75 MM |
1017 | found = btrace_find_call_by_number (&end, btinfo, high); |
1018 | if (found == 0) | |
0688d04e MM |
1019 | { |
1020 | /* Silently truncate the range. */ | |
1021 | btrace_call_end (&end, btinfo); | |
1022 | } | |
1023 | else | |
1024 | { | |
1025 | /* We want both begin and end to be inclusive. */ | |
1026 | btrace_call_next (&end, 1); | |
1027 | } | |
afedecd3 | 1028 | |
8710b709 | 1029 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1030 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1031 | |
1032 | do_cleanups (uiout_cleanup); | |
1033 | } | |
1034 | ||
1035 | /* The to_call_history_from method of target record-btrace. */ | |
1036 | ||
1037 | static void | |
ec0aea04 TT |
1038 | record_btrace_call_history_from (struct target_ops *self, |
1039 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
1040 | { |
1041 | ULONGEST begin, end, context; | |
1042 | ||
1043 | context = abs (size); | |
0688d04e MM |
1044 | if (context == 0) |
1045 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1046 | |
1047 | if (size < 0) | |
1048 | { | |
1049 | end = from; | |
1050 | ||
1051 | if (from < context) | |
1052 | begin = 0; | |
1053 | else | |
0688d04e | 1054 | begin = from - context + 1; |
afedecd3 MM |
1055 | } |
1056 | else | |
1057 | { | |
1058 | begin = from; | |
0688d04e | 1059 | end = from + context - 1; |
afedecd3 MM |
1060 | |
1061 | /* Check for wrap-around. */ | |
1062 | if (end < begin) | |
1063 | end = ULONGEST_MAX; | |
1064 | } | |
1065 | ||
f0d960ea | 1066 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1067 | } |
1068 | ||
07bbe694 MM |
1069 | /* The to_record_is_replaying method of target record-btrace. */ |
1070 | ||
1071 | static int | |
1c63c994 | 1072 | record_btrace_is_replaying (struct target_ops *self) |
07bbe694 MM |
1073 | { |
1074 | struct thread_info *tp; | |
1075 | ||
034f788c | 1076 | ALL_NON_EXITED_THREADS (tp) |
07bbe694 MM |
1077 | if (btrace_is_replaying (tp)) |
1078 | return 1; | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
633785ff MM |
1083 | /* The to_xfer_partial method of target record-btrace. */ |
1084 | ||
9b409511 | 1085 | static enum target_xfer_status |
633785ff MM |
1086 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1087 | const char *annex, gdb_byte *readbuf, | |
1088 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1089 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1090 | { |
1091 | struct target_ops *t; | |
1092 | ||
1093 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1094 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1095 | && !record_btrace_generating_corefile |
67b5c0c1 | 1096 | && record_btrace_is_replaying (ops)) |
633785ff MM |
1097 | { |
1098 | switch (object) | |
1099 | { | |
1100 | case TARGET_OBJECT_MEMORY: | |
1101 | { | |
1102 | struct target_section *section; | |
1103 | ||
1104 | /* We do not allow writing memory in general. */ | |
1105 | if (writebuf != NULL) | |
9b409511 YQ |
1106 | { |
1107 | *xfered_len = len; | |
bc113b4e | 1108 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1109 | } |
633785ff MM |
1110 | |
1111 | /* We allow reading readonly memory. */ | |
1112 | section = target_section_by_addr (ops, offset); | |
1113 | if (section != NULL) | |
1114 | { | |
1115 | /* Check if the section we found is readonly. */ | |
1116 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1117 | section->the_bfd_section) | |
1118 | & SEC_READONLY) != 0) | |
1119 | { | |
1120 | /* Truncate the request to fit into this section. */ | |
1121 | len = min (len, section->endaddr - offset); | |
1122 | break; | |
1123 | } | |
1124 | } | |
1125 | ||
9b409511 | 1126 | *xfered_len = len; |
bc113b4e | 1127 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1128 | } |
1129 | } | |
1130 | } | |
1131 | ||
1132 | /* Forward the request. */ | |
e75fdfca TT |
1133 | ops = ops->beneath; |
1134 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1135 | offset, len, xfered_len); | |
633785ff MM |
1136 | } |
1137 | ||
1138 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1139 | ||
1140 | static int | |
1141 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1142 | struct gdbarch *gdbarch, | |
1143 | struct bp_target_info *bp_tgt) | |
1144 | { | |
67b5c0c1 MM |
1145 | const char *old; |
1146 | int ret; | |
633785ff MM |
1147 | |
1148 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1149 | duration of this function. */ | |
67b5c0c1 MM |
1150 | old = replay_memory_access; |
1151 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1152 | |
1153 | ret = 0; | |
492d29ea PA |
1154 | TRY |
1155 | { | |
1156 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1157 | } | |
633785ff | 1158 | |
67b5c0c1 | 1159 | replay_memory_access = old; |
633785ff | 1160 | |
492d29ea PA |
1161 | CATCH (except, RETURN_MASK_ALL) |
1162 | { | |
1163 | throw_exception (except); | |
1164 | } | |
1165 | END_CATCH | |
633785ff MM |
1166 | |
1167 | return ret; | |
1168 | } | |
1169 | ||
1170 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1171 | ||
1172 | static int | |
1173 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1174 | struct gdbarch *gdbarch, | |
1175 | struct bp_target_info *bp_tgt) | |
1176 | { | |
67b5c0c1 MM |
1177 | const char *old; |
1178 | int ret; | |
633785ff MM |
1179 | |
1180 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1181 | duration of this function. */ | |
67b5c0c1 MM |
1182 | old = replay_memory_access; |
1183 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1184 | |
1185 | ret = 0; | |
492d29ea PA |
1186 | TRY |
1187 | { | |
1188 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1189 | } | |
633785ff | 1190 | |
67b5c0c1 | 1191 | replay_memory_access = old; |
633785ff | 1192 | |
492d29ea PA |
1193 | CATCH (except, RETURN_MASK_ALL) |
1194 | { | |
1195 | throw_exception (except); | |
1196 | } | |
1197 | END_CATCH | |
633785ff MM |
1198 | |
1199 | return ret; | |
1200 | } | |
1201 | ||
1f3ef581 MM |
1202 | /* The to_fetch_registers method of target record-btrace. */ |
1203 | ||
1204 | static void | |
1205 | record_btrace_fetch_registers (struct target_ops *ops, | |
1206 | struct regcache *regcache, int regno) | |
1207 | { | |
1208 | struct btrace_insn_iterator *replay; | |
1209 | struct thread_info *tp; | |
1210 | ||
1211 | tp = find_thread_ptid (inferior_ptid); | |
1212 | gdb_assert (tp != NULL); | |
1213 | ||
1214 | replay = tp->btrace.replay; | |
aef92902 | 1215 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1216 | { |
1217 | const struct btrace_insn *insn; | |
1218 | struct gdbarch *gdbarch; | |
1219 | int pcreg; | |
1220 | ||
1221 | gdbarch = get_regcache_arch (regcache); | |
1222 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1223 | if (pcreg < 0) | |
1224 | return; | |
1225 | ||
1226 | /* We can only provide the PC register. */ | |
1227 | if (regno >= 0 && regno != pcreg) | |
1228 | return; | |
1229 | ||
1230 | insn = btrace_insn_get (replay); | |
1231 | gdb_assert (insn != NULL); | |
1232 | ||
1233 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1234 | } | |
1235 | else | |
1236 | { | |
e75fdfca | 1237 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1238 | |
e75fdfca | 1239 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1240 | } |
1241 | } | |
1242 | ||
1243 | /* The to_store_registers method of target record-btrace. */ | |
1244 | ||
1245 | static void | |
1246 | record_btrace_store_registers (struct target_ops *ops, | |
1247 | struct regcache *regcache, int regno) | |
1248 | { | |
1249 | struct target_ops *t; | |
1250 | ||
aef92902 | 1251 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1252 | error (_("This record target does not allow writing registers.")); |
1253 | ||
1254 | gdb_assert (may_write_registers != 0); | |
1255 | ||
e75fdfca TT |
1256 | t = ops->beneath; |
1257 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1258 | } |
1259 | ||
1260 | /* The to_prepare_to_store method of target record-btrace. */ | |
1261 | ||
1262 | static void | |
1263 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1264 | struct regcache *regcache) | |
1265 | { | |
1266 | struct target_ops *t; | |
1267 | ||
aef92902 | 1268 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1269 | return; |
1270 | ||
e75fdfca TT |
1271 | t = ops->beneath; |
1272 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1273 | } |
1274 | ||
0b722aec MM |
1275 | /* The branch trace frame cache. */ |
1276 | ||
1277 | struct btrace_frame_cache | |
1278 | { | |
1279 | /* The thread. */ | |
1280 | struct thread_info *tp; | |
1281 | ||
1282 | /* The frame info. */ | |
1283 | struct frame_info *frame; | |
1284 | ||
1285 | /* The branch trace function segment. */ | |
1286 | const struct btrace_function *bfun; | |
1287 | }; | |
1288 | ||
1289 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1290 | ||
1291 | static htab_t bfcache; | |
1292 | ||
1293 | /* hash_f for htab_create_alloc of bfcache. */ | |
1294 | ||
1295 | static hashval_t | |
1296 | bfcache_hash (const void *arg) | |
1297 | { | |
1298 | const struct btrace_frame_cache *cache = arg; | |
1299 | ||
1300 | return htab_hash_pointer (cache->frame); | |
1301 | } | |
1302 | ||
1303 | /* eq_f for htab_create_alloc of bfcache. */ | |
1304 | ||
1305 | static int | |
1306 | bfcache_eq (const void *arg1, const void *arg2) | |
1307 | { | |
1308 | const struct btrace_frame_cache *cache1 = arg1; | |
1309 | const struct btrace_frame_cache *cache2 = arg2; | |
1310 | ||
1311 | return cache1->frame == cache2->frame; | |
1312 | } | |
1313 | ||
1314 | /* Create a new btrace frame cache. */ | |
1315 | ||
1316 | static struct btrace_frame_cache * | |
1317 | bfcache_new (struct frame_info *frame) | |
1318 | { | |
1319 | struct btrace_frame_cache *cache; | |
1320 | void **slot; | |
1321 | ||
1322 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1323 | cache->frame = frame; | |
1324 | ||
1325 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1326 | gdb_assert (*slot == NULL); | |
1327 | *slot = cache; | |
1328 | ||
1329 | return cache; | |
1330 | } | |
1331 | ||
1332 | /* Extract the branch trace function from a branch trace frame. */ | |
1333 | ||
1334 | static const struct btrace_function * | |
1335 | btrace_get_frame_function (struct frame_info *frame) | |
1336 | { | |
1337 | const struct btrace_frame_cache *cache; | |
1338 | const struct btrace_function *bfun; | |
1339 | struct btrace_frame_cache pattern; | |
1340 | void **slot; | |
1341 | ||
1342 | pattern.frame = frame; | |
1343 | ||
1344 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1345 | if (slot == NULL) | |
1346 | return NULL; | |
1347 | ||
1348 | cache = *slot; | |
1349 | return cache->bfun; | |
1350 | } | |
1351 | ||
cecac1ab MM |
1352 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1353 | ||
1354 | static enum unwind_stop_reason | |
1355 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1356 | void **this_cache) | |
1357 | { | |
0b722aec MM |
1358 | const struct btrace_frame_cache *cache; |
1359 | const struct btrace_function *bfun; | |
1360 | ||
1361 | cache = *this_cache; | |
1362 | bfun = cache->bfun; | |
1363 | gdb_assert (bfun != NULL); | |
1364 | ||
1365 | if (bfun->up == NULL) | |
1366 | return UNWIND_UNAVAILABLE; | |
1367 | ||
1368 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1369 | } |
1370 | ||
1371 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1372 | ||
1373 | static void | |
1374 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1375 | struct frame_id *this_id) | |
1376 | { | |
0b722aec MM |
1377 | const struct btrace_frame_cache *cache; |
1378 | const struct btrace_function *bfun; | |
1379 | CORE_ADDR code, special; | |
1380 | ||
1381 | cache = *this_cache; | |
1382 | ||
1383 | bfun = cache->bfun; | |
1384 | gdb_assert (bfun != NULL); | |
1385 | ||
1386 | while (bfun->segment.prev != NULL) | |
1387 | bfun = bfun->segment.prev; | |
1388 | ||
1389 | code = get_frame_func (this_frame); | |
1390 | special = bfun->number; | |
1391 | ||
1392 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1393 | ||
1394 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1395 | btrace_get_bfun_name (cache->bfun), | |
1396 | core_addr_to_string_nz (this_id->code_addr), | |
1397 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1398 | } |
1399 | ||
1400 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1401 | ||
1402 | static struct value * | |
1403 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1404 | void **this_cache, | |
1405 | int regnum) | |
1406 | { | |
0b722aec MM |
1407 | const struct btrace_frame_cache *cache; |
1408 | const struct btrace_function *bfun, *caller; | |
1409 | const struct btrace_insn *insn; | |
1410 | struct gdbarch *gdbarch; | |
1411 | CORE_ADDR pc; | |
1412 | int pcreg; | |
1413 | ||
1414 | gdbarch = get_frame_arch (this_frame); | |
1415 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1416 | if (pcreg < 0 || regnum != pcreg) | |
1417 | throw_error (NOT_AVAILABLE_ERROR, | |
1418 | _("Registers are not available in btrace record history")); | |
1419 | ||
1420 | cache = *this_cache; | |
1421 | bfun = cache->bfun; | |
1422 | gdb_assert (bfun != NULL); | |
1423 | ||
1424 | caller = bfun->up; | |
1425 | if (caller == NULL) | |
1426 | throw_error (NOT_AVAILABLE_ERROR, | |
1427 | _("No caller in btrace record history")); | |
1428 | ||
1429 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1430 | { | |
1431 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1432 | pc = insn->pc; | |
1433 | } | |
1434 | else | |
1435 | { | |
1436 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1437 | pc = insn->pc; | |
1438 | ||
1439 | pc += gdb_insn_length (gdbarch, pc); | |
1440 | } | |
1441 | ||
1442 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1443 | btrace_get_bfun_name (bfun), bfun->level, | |
1444 | core_addr_to_string_nz (pc)); | |
1445 | ||
1446 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1447 | } |
1448 | ||
1449 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1450 | ||
1451 | static int | |
1452 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1453 | struct frame_info *this_frame, | |
1454 | void **this_cache) | |
1455 | { | |
0b722aec MM |
1456 | const struct btrace_function *bfun; |
1457 | struct btrace_frame_cache *cache; | |
cecac1ab | 1458 | struct thread_info *tp; |
0b722aec | 1459 | struct frame_info *next; |
cecac1ab MM |
1460 | |
1461 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1462 | tp = find_thread_ptid (inferior_ptid); | |
1463 | gdb_assert (tp != NULL); | |
1464 | ||
0b722aec MM |
1465 | bfun = NULL; |
1466 | next = get_next_frame (this_frame); | |
1467 | if (next == NULL) | |
1468 | { | |
1469 | const struct btrace_insn_iterator *replay; | |
1470 | ||
1471 | replay = tp->btrace.replay; | |
1472 | if (replay != NULL) | |
1473 | bfun = replay->function; | |
1474 | } | |
1475 | else | |
1476 | { | |
1477 | const struct btrace_function *callee; | |
1478 | ||
1479 | callee = btrace_get_frame_function (next); | |
1480 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1481 | bfun = callee->up; | |
1482 | } | |
1483 | ||
1484 | if (bfun == NULL) | |
1485 | return 0; | |
1486 | ||
1487 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1488 | btrace_get_bfun_name (bfun), bfun->level); | |
1489 | ||
1490 | /* This is our frame. Initialize the frame cache. */ | |
1491 | cache = bfcache_new (this_frame); | |
1492 | cache->tp = tp; | |
1493 | cache->bfun = bfun; | |
1494 | ||
1495 | *this_cache = cache; | |
1496 | return 1; | |
1497 | } | |
1498 | ||
1499 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1500 | ||
1501 | static int | |
1502 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1503 | struct frame_info *this_frame, | |
1504 | void **this_cache) | |
1505 | { | |
1506 | const struct btrace_function *bfun, *callee; | |
1507 | struct btrace_frame_cache *cache; | |
1508 | struct frame_info *next; | |
1509 | ||
1510 | next = get_next_frame (this_frame); | |
1511 | if (next == NULL) | |
1512 | return 0; | |
1513 | ||
1514 | callee = btrace_get_frame_function (next); | |
1515 | if (callee == NULL) | |
1516 | return 0; | |
1517 | ||
1518 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1519 | return 0; | |
1520 | ||
1521 | bfun = callee->up; | |
1522 | if (bfun == NULL) | |
1523 | return 0; | |
1524 | ||
1525 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1526 | btrace_get_bfun_name (bfun), bfun->level); | |
1527 | ||
1528 | /* This is our frame. Initialize the frame cache. */ | |
1529 | cache = bfcache_new (this_frame); | |
1530 | cache->tp = find_thread_ptid (inferior_ptid); | |
1531 | cache->bfun = bfun; | |
1532 | ||
1533 | *this_cache = cache; | |
1534 | return 1; | |
1535 | } | |
1536 | ||
1537 | static void | |
1538 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1539 | { | |
1540 | struct btrace_frame_cache *cache; | |
1541 | void **slot; | |
1542 | ||
1543 | cache = this_cache; | |
1544 | ||
1545 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1546 | gdb_assert (slot != NULL); | |
1547 | ||
1548 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1549 | } |
1550 | ||
1551 | /* btrace recording does not store previous memory content, neither the stack | |
1552 | frames content. Any unwinding would return errorneous results as the stack | |
1553 | contents no longer matches the changed PC value restored from history. | |
1554 | Therefore this unwinder reports any possibly unwound registers as | |
1555 | <unavailable>. */ | |
1556 | ||
0b722aec | 1557 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1558 | { |
1559 | NORMAL_FRAME, | |
1560 | record_btrace_frame_unwind_stop_reason, | |
1561 | record_btrace_frame_this_id, | |
1562 | record_btrace_frame_prev_register, | |
1563 | NULL, | |
0b722aec MM |
1564 | record_btrace_frame_sniffer, |
1565 | record_btrace_frame_dealloc_cache | |
1566 | }; | |
1567 | ||
1568 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1569 | { | |
1570 | TAILCALL_FRAME, | |
1571 | record_btrace_frame_unwind_stop_reason, | |
1572 | record_btrace_frame_this_id, | |
1573 | record_btrace_frame_prev_register, | |
1574 | NULL, | |
1575 | record_btrace_tailcall_frame_sniffer, | |
1576 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1577 | }; |
b2f4cfde | 1578 | |
ac01945b TT |
1579 | /* Implement the to_get_unwinder method. */ |
1580 | ||
1581 | static const struct frame_unwind * | |
1582 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1583 | { | |
1584 | return &record_btrace_frame_unwind; | |
1585 | } | |
1586 | ||
1587 | /* Implement the to_get_tailcall_unwinder method. */ | |
1588 | ||
1589 | static const struct frame_unwind * | |
1590 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1591 | { | |
1592 | return &record_btrace_tailcall_frame_unwind; | |
1593 | } | |
1594 | ||
52834460 MM |
1595 | /* Indicate that TP should be resumed according to FLAG. */ |
1596 | ||
1597 | static void | |
1598 | record_btrace_resume_thread (struct thread_info *tp, | |
1599 | enum btrace_thread_flag flag) | |
1600 | { | |
1601 | struct btrace_thread_info *btinfo; | |
1602 | ||
1603 | DEBUG ("resuming %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flag); | |
1604 | ||
1605 | btinfo = &tp->btrace; | |
1606 | ||
1607 | if ((btinfo->flags & BTHR_MOVE) != 0) | |
1608 | error (_("Thread already moving.")); | |
1609 | ||
1610 | /* Fetch the latest branch trace. */ | |
1611 | btrace_fetch (tp); | |
1612 | ||
1613 | btinfo->flags |= flag; | |
1614 | } | |
1615 | ||
1616 | /* Find the thread to resume given a PTID. */ | |
1617 | ||
1618 | static struct thread_info * | |
1619 | record_btrace_find_resume_thread (ptid_t ptid) | |
1620 | { | |
1621 | struct thread_info *tp; | |
1622 | ||
1623 | /* When asked to resume everything, we pick the current thread. */ | |
1624 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1625 | ptid = inferior_ptid; | |
1626 | ||
1627 | return find_thread_ptid (ptid); | |
1628 | } | |
1629 | ||
1630 | /* Start replaying a thread. */ | |
1631 | ||
1632 | static struct btrace_insn_iterator * | |
1633 | record_btrace_start_replaying (struct thread_info *tp) | |
1634 | { | |
52834460 MM |
1635 | struct btrace_insn_iterator *replay; |
1636 | struct btrace_thread_info *btinfo; | |
1637 | int executing; | |
1638 | ||
1639 | btinfo = &tp->btrace; | |
1640 | replay = NULL; | |
1641 | ||
1642 | /* We can't start replaying without trace. */ | |
1643 | if (btinfo->begin == NULL) | |
1644 | return NULL; | |
1645 | ||
1646 | /* Clear the executing flag to allow changes to the current frame. | |
1647 | We are not actually running, yet. We just started a reverse execution | |
1648 | command or a record goto command. | |
1649 | For the latter, EXECUTING is false and this has no effect. | |
1650 | For the former, EXECUTING is true and we're in to_wait, about to | |
1651 | move the thread. Since we need to recompute the stack, we temporarily | |
1652 | set EXECUTING to flase. */ | |
1653 | executing = is_executing (tp->ptid); | |
1654 | set_executing (tp->ptid, 0); | |
1655 | ||
1656 | /* GDB stores the current frame_id when stepping in order to detects steps | |
1657 | into subroutines. | |
1658 | Since frames are computed differently when we're replaying, we need to | |
1659 | recompute those stored frames and fix them up so we can still detect | |
1660 | subroutines after we started replaying. */ | |
492d29ea | 1661 | TRY |
52834460 MM |
1662 | { |
1663 | struct frame_info *frame; | |
1664 | struct frame_id frame_id; | |
1665 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1666 | ||
1667 | /* The current frame without replaying - computed via normal unwind. */ | |
1668 | frame = get_current_frame (); | |
1669 | frame_id = get_frame_id (frame); | |
1670 | ||
1671 | /* Check if we need to update any stepping-related frame id's. */ | |
1672 | upd_step_frame_id = frame_id_eq (frame_id, | |
1673 | tp->control.step_frame_id); | |
1674 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1675 | tp->control.step_stack_frame_id); | |
1676 | ||
1677 | /* We start replaying at the end of the branch trace. This corresponds | |
1678 | to the current instruction. */ | |
1679 | replay = xmalloc (sizeof (*replay)); | |
1680 | btrace_insn_end (replay, btinfo); | |
1681 | ||
31fd9caa MM |
1682 | /* Skip gaps at the end of the trace. */ |
1683 | while (btrace_insn_get (replay) == NULL) | |
1684 | { | |
1685 | unsigned int steps; | |
1686 | ||
1687 | steps = btrace_insn_prev (replay, 1); | |
1688 | if (steps == 0) | |
1689 | error (_("No trace.")); | |
1690 | } | |
1691 | ||
52834460 MM |
1692 | /* We're not replaying, yet. */ |
1693 | gdb_assert (btinfo->replay == NULL); | |
1694 | btinfo->replay = replay; | |
1695 | ||
1696 | /* Make sure we're not using any stale registers. */ | |
1697 | registers_changed_ptid (tp->ptid); | |
1698 | ||
1699 | /* The current frame with replaying - computed via btrace unwind. */ | |
1700 | frame = get_current_frame (); | |
1701 | frame_id = get_frame_id (frame); | |
1702 | ||
1703 | /* Replace stepping related frames where necessary. */ | |
1704 | if (upd_step_frame_id) | |
1705 | tp->control.step_frame_id = frame_id; | |
1706 | if (upd_step_stack_frame_id) | |
1707 | tp->control.step_stack_frame_id = frame_id; | |
1708 | } | |
1709 | ||
1710 | /* Restore the previous execution state. */ | |
1711 | set_executing (tp->ptid, executing); | |
1712 | ||
492d29ea | 1713 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
1714 | { |
1715 | xfree (btinfo->replay); | |
1716 | btinfo->replay = NULL; | |
1717 | ||
1718 | registers_changed_ptid (tp->ptid); | |
1719 | ||
1720 | throw_exception (except); | |
1721 | } | |
492d29ea | 1722 | END_CATCH |
52834460 MM |
1723 | |
1724 | return replay; | |
1725 | } | |
1726 | ||
1727 | /* Stop replaying a thread. */ | |
1728 | ||
1729 | static void | |
1730 | record_btrace_stop_replaying (struct thread_info *tp) | |
1731 | { | |
1732 | struct btrace_thread_info *btinfo; | |
1733 | ||
1734 | btinfo = &tp->btrace; | |
1735 | ||
1736 | xfree (btinfo->replay); | |
1737 | btinfo->replay = NULL; | |
1738 | ||
1739 | /* Make sure we're not leaving any stale registers. */ | |
1740 | registers_changed_ptid (tp->ptid); | |
1741 | } | |
1742 | ||
b2f4cfde MM |
1743 | /* The to_resume method of target record-btrace. */ |
1744 | ||
1745 | static void | |
1746 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1747 | enum gdb_signal signal) | |
1748 | { | |
52834460 MM |
1749 | struct thread_info *tp, *other; |
1750 | enum btrace_thread_flag flag; | |
1751 | ||
1752 | DEBUG ("resume %s: %s", target_pid_to_str (ptid), step ? "step" : "cont"); | |
1753 | ||
70ad5bff MM |
1754 | /* Store the execution direction of the last resume. */ |
1755 | record_btrace_resume_exec_dir = execution_direction; | |
1756 | ||
52834460 MM |
1757 | tp = record_btrace_find_resume_thread (ptid); |
1758 | if (tp == NULL) | |
1759 | error (_("Cannot find thread to resume.")); | |
1760 | ||
1761 | /* Stop replaying other threads if the thread to resume is not replaying. */ | |
1762 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
034f788c | 1763 | ALL_NON_EXITED_THREADS (other) |
52834460 MM |
1764 | record_btrace_stop_replaying (other); |
1765 | ||
b2f4cfde | 1766 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 1767 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 1768 | { |
e75fdfca TT |
1769 | ops = ops->beneath; |
1770 | return ops->to_resume (ops, ptid, step, signal); | |
b2f4cfde MM |
1771 | } |
1772 | ||
52834460 MM |
1773 | /* Compute the btrace thread flag for the requested move. */ |
1774 | if (step == 0) | |
1775 | flag = execution_direction == EXEC_REVERSE ? BTHR_RCONT : BTHR_CONT; | |
1776 | else | |
1777 | flag = execution_direction == EXEC_REVERSE ? BTHR_RSTEP : BTHR_STEP; | |
1778 | ||
1779 | /* At the moment, we only move a single thread. We could also move | |
1780 | all threads in parallel by single-stepping each resumed thread | |
1781 | until the first runs into an event. | |
1782 | When we do that, we would want to continue all other threads. | |
1783 | For now, just resume one thread to not confuse to_wait. */ | |
1784 | record_btrace_resume_thread (tp, flag); | |
1785 | ||
1786 | /* We just indicate the resume intent here. The actual stepping happens in | |
1787 | record_btrace_wait below. */ | |
70ad5bff MM |
1788 | |
1789 | /* Async support. */ | |
1790 | if (target_can_async_p ()) | |
1791 | { | |
1792 | target_async (inferior_event_handler, 0); | |
1793 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
1794 | } | |
52834460 MM |
1795 | } |
1796 | ||
1797 | /* Find a thread to move. */ | |
1798 | ||
1799 | static struct thread_info * | |
1800 | record_btrace_find_thread_to_move (ptid_t ptid) | |
1801 | { | |
1802 | struct thread_info *tp; | |
1803 | ||
1804 | /* First check the parameter thread. */ | |
1805 | tp = find_thread_ptid (ptid); | |
1806 | if (tp != NULL && (tp->btrace.flags & BTHR_MOVE) != 0) | |
1807 | return tp; | |
1808 | ||
1809 | /* Otherwise, find one other thread that has been resumed. */ | |
034f788c | 1810 | ALL_NON_EXITED_THREADS (tp) |
52834460 MM |
1811 | if ((tp->btrace.flags & BTHR_MOVE) != 0) |
1812 | return tp; | |
1813 | ||
1814 | return NULL; | |
1815 | } | |
1816 | ||
1817 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1818 | ||
1819 | static struct target_waitstatus | |
1820 | btrace_step_no_history (void) | |
1821 | { | |
1822 | struct target_waitstatus status; | |
1823 | ||
1824 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1825 | ||
1826 | return status; | |
1827 | } | |
1828 | ||
1829 | /* Return a target_waitstatus indicating that a step finished. */ | |
1830 | ||
1831 | static struct target_waitstatus | |
1832 | btrace_step_stopped (void) | |
1833 | { | |
1834 | struct target_waitstatus status; | |
1835 | ||
1836 | status.kind = TARGET_WAITKIND_STOPPED; | |
1837 | status.value.sig = GDB_SIGNAL_TRAP; | |
1838 | ||
1839 | return status; | |
1840 | } | |
1841 | ||
1842 | /* Clear the record histories. */ | |
1843 | ||
1844 | static void | |
1845 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
1846 | { | |
1847 | xfree (btinfo->insn_history); | |
1848 | xfree (btinfo->call_history); | |
1849 | ||
1850 | btinfo->insn_history = NULL; | |
1851 | btinfo->call_history = NULL; | |
1852 | } | |
1853 | ||
1854 | /* Step a single thread. */ | |
1855 | ||
1856 | static struct target_waitstatus | |
1857 | record_btrace_step_thread (struct thread_info *tp) | |
1858 | { | |
1859 | struct btrace_insn_iterator *replay, end; | |
1860 | struct btrace_thread_info *btinfo; | |
1861 | struct address_space *aspace; | |
1862 | struct inferior *inf; | |
1863 | enum btrace_thread_flag flags; | |
1864 | unsigned int steps; | |
1865 | ||
e59fa00f MM |
1866 | /* We can't step without an execution history. */ |
1867 | if (btrace_is_empty (tp)) | |
1868 | return btrace_step_no_history (); | |
1869 | ||
52834460 MM |
1870 | btinfo = &tp->btrace; |
1871 | replay = btinfo->replay; | |
1872 | ||
1873 | flags = btinfo->flags & BTHR_MOVE; | |
1874 | btinfo->flags &= ~BTHR_MOVE; | |
1875 | ||
1876 | DEBUG ("stepping %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flags); | |
1877 | ||
1878 | switch (flags) | |
1879 | { | |
1880 | default: | |
1881 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
1882 | ||
1883 | case BTHR_STEP: | |
1884 | /* We're done if we're not replaying. */ | |
1885 | if (replay == NULL) | |
1886 | return btrace_step_no_history (); | |
1887 | ||
31fd9caa MM |
1888 | /* Skip gaps during replay. */ |
1889 | do | |
1890 | { | |
1891 | steps = btrace_insn_next (replay, 1); | |
1892 | if (steps == 0) | |
1893 | { | |
1894 | record_btrace_stop_replaying (tp); | |
1895 | return btrace_step_no_history (); | |
1896 | } | |
1897 | } | |
1898 | while (btrace_insn_get (replay) == NULL); | |
52834460 MM |
1899 | |
1900 | /* Determine the end of the instruction trace. */ | |
1901 | btrace_insn_end (&end, btinfo); | |
1902 | ||
1903 | /* We stop replaying if we reached the end of the trace. */ | |
1904 | if (btrace_insn_cmp (replay, &end) == 0) | |
1905 | record_btrace_stop_replaying (tp); | |
1906 | ||
1907 | return btrace_step_stopped (); | |
1908 | ||
1909 | case BTHR_RSTEP: | |
1910 | /* Start replaying if we're not already doing so. */ | |
1911 | if (replay == NULL) | |
1912 | replay = record_btrace_start_replaying (tp); | |
1913 | ||
31fd9caa MM |
1914 | /* If we can't step any further, we reached the end of the history. |
1915 | Skip gaps during replay. */ | |
1916 | do | |
1917 | { | |
1918 | steps = btrace_insn_prev (replay, 1); | |
1919 | if (steps == 0) | |
1920 | return btrace_step_no_history (); | |
1921 | ||
1922 | } | |
1923 | while (btrace_insn_get (replay) == NULL); | |
52834460 MM |
1924 | |
1925 | return btrace_step_stopped (); | |
1926 | ||
1927 | case BTHR_CONT: | |
1928 | /* We're done if we're not replaying. */ | |
1929 | if (replay == NULL) | |
1930 | return btrace_step_no_history (); | |
1931 | ||
c9657e70 | 1932 | inf = find_inferior_ptid (tp->ptid); |
52834460 MM |
1933 | aspace = inf->aspace; |
1934 | ||
1935 | /* Determine the end of the instruction trace. */ | |
1936 | btrace_insn_end (&end, btinfo); | |
1937 | ||
1938 | for (;;) | |
1939 | { | |
1940 | const struct btrace_insn *insn; | |
1941 | ||
31fd9caa MM |
1942 | /* Skip gaps during replay. */ |
1943 | do | |
1944 | { | |
1945 | steps = btrace_insn_next (replay, 1); | |
1946 | if (steps == 0) | |
1947 | { | |
1948 | record_btrace_stop_replaying (tp); | |
1949 | return btrace_step_no_history (); | |
1950 | } | |
1951 | ||
1952 | insn = btrace_insn_get (replay); | |
1953 | } | |
1954 | while (insn == NULL); | |
52834460 MM |
1955 | |
1956 | /* We stop replaying if we reached the end of the trace. */ | |
1957 | if (btrace_insn_cmp (replay, &end) == 0) | |
1958 | { | |
1959 | record_btrace_stop_replaying (tp); | |
1960 | return btrace_step_no_history (); | |
1961 | } | |
1962 | ||
52834460 MM |
1963 | DEBUG ("stepping %d (%s) ... %s", tp->num, |
1964 | target_pid_to_str (tp->ptid), | |
1965 | core_addr_to_string_nz (insn->pc)); | |
1966 | ||
9e8915c6 PA |
1967 | if (record_check_stopped_by_breakpoint (aspace, insn->pc, |
1968 | &btinfo->stop_reason)) | |
52834460 MM |
1969 | return btrace_step_stopped (); |
1970 | } | |
1971 | ||
1972 | case BTHR_RCONT: | |
1973 | /* Start replaying if we're not already doing so. */ | |
1974 | if (replay == NULL) | |
1975 | replay = record_btrace_start_replaying (tp); | |
1976 | ||
c9657e70 | 1977 | inf = find_inferior_ptid (tp->ptid); |
52834460 MM |
1978 | aspace = inf->aspace; |
1979 | ||
1980 | for (;;) | |
1981 | { | |
1982 | const struct btrace_insn *insn; | |
1983 | ||
31fd9caa MM |
1984 | /* If we can't step any further, we reached the end of the history. |
1985 | Skip gaps during replay. */ | |
1986 | do | |
1987 | { | |
1988 | steps = btrace_insn_prev (replay, 1); | |
1989 | if (steps == 0) | |
1990 | return btrace_step_no_history (); | |
52834460 | 1991 | |
31fd9caa MM |
1992 | insn = btrace_insn_get (replay); |
1993 | } | |
1994 | while (insn == NULL); | |
52834460 MM |
1995 | |
1996 | DEBUG ("reverse-stepping %d (%s) ... %s", tp->num, | |
1997 | target_pid_to_str (tp->ptid), | |
1998 | core_addr_to_string_nz (insn->pc)); | |
1999 | ||
9e8915c6 PA |
2000 | if (record_check_stopped_by_breakpoint (aspace, insn->pc, |
2001 | &btinfo->stop_reason)) | |
52834460 MM |
2002 | return btrace_step_stopped (); |
2003 | } | |
2004 | } | |
b2f4cfde MM |
2005 | } |
2006 | ||
2007 | /* The to_wait method of target record-btrace. */ | |
2008 | ||
2009 | static ptid_t | |
2010 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2011 | struct target_waitstatus *status, int options) | |
2012 | { | |
52834460 MM |
2013 | struct thread_info *tp, *other; |
2014 | ||
2015 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2016 | ||
b2f4cfde | 2017 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 2018 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 2019 | { |
e75fdfca TT |
2020 | ops = ops->beneath; |
2021 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2022 | } |
2023 | ||
52834460 MM |
2024 | /* Let's find a thread to move. */ |
2025 | tp = record_btrace_find_thread_to_move (ptid); | |
2026 | if (tp == NULL) | |
2027 | { | |
2028 | DEBUG ("wait %s: no thread", target_pid_to_str (ptid)); | |
2029 | ||
2030 | status->kind = TARGET_WAITKIND_IGNORE; | |
2031 | return minus_one_ptid; | |
2032 | } | |
2033 | ||
2034 | /* We only move a single thread. We're not able to correlate threads. */ | |
2035 | *status = record_btrace_step_thread (tp); | |
2036 | ||
2037 | /* Stop all other threads. */ | |
2038 | if (!non_stop) | |
034f788c | 2039 | ALL_NON_EXITED_THREADS (other) |
52834460 MM |
2040 | other->btrace.flags &= ~BTHR_MOVE; |
2041 | ||
2042 | /* Start record histories anew from the current position. */ | |
2043 | record_btrace_clear_histories (&tp->btrace); | |
2044 | ||
2045 | /* We moved the replay position but did not update registers. */ | |
2046 | registers_changed_ptid (tp->ptid); | |
2047 | ||
2048 | return tp->ptid; | |
2049 | } | |
2050 | ||
2051 | /* The to_can_execute_reverse method of target record-btrace. */ | |
2052 | ||
2053 | static int | |
19db3e69 | 2054 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2055 | { |
2056 | return 1; | |
2057 | } | |
2058 | ||
9e8915c6 | 2059 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2060 | |
9e8915c6 PA |
2061 | static int |
2062 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2063 | { |
1c63c994 | 2064 | if (record_btrace_is_replaying (ops)) |
9e8915c6 PA |
2065 | { |
2066 | struct thread_info *tp = inferior_thread (); | |
2067 | ||
2068 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2069 | } | |
2070 | ||
2071 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2072 | } | |
2073 | ||
2074 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2075 | record-btrace. */ | |
2076 | ||
2077 | static int | |
2078 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2079 | { | |
2080 | if (record_btrace_is_replaying (ops)) | |
2081 | return 1; | |
2082 | ||
2083 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2084 | } | |
2085 | ||
2086 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2087 | ||
2088 | static int | |
2089 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2090 | { | |
2091 | if (record_btrace_is_replaying (ops)) | |
2092 | { | |
2093 | struct thread_info *tp = inferior_thread (); | |
2094 | ||
2095 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2096 | } | |
2097 | ||
2098 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2099 | } | |
2100 | ||
2101 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2102 | record-btrace. */ | |
2103 | ||
2104 | static int | |
2105 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2106 | { | |
2107 | if (record_btrace_is_replaying (ops)) | |
2108 | return 1; | |
52834460 | 2109 | |
9e8915c6 | 2110 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2111 | } |
2112 | ||
e8032dde | 2113 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2114 | |
2115 | static void | |
e8032dde | 2116 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2117 | { |
e8032dde | 2118 | /* We don't add or remove threads during replay. */ |
1c63c994 | 2119 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2120 | return; |
2121 | ||
2122 | /* Forward the request. */ | |
e75fdfca | 2123 | ops = ops->beneath; |
e8032dde | 2124 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2125 | } |
2126 | ||
2127 | /* The to_thread_alive method of target record-btrace. */ | |
2128 | ||
2129 | static int | |
2130 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2131 | { | |
2132 | /* We don't add or remove threads during replay. */ | |
1c63c994 | 2133 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2134 | return find_thread_ptid (ptid) != NULL; |
2135 | ||
2136 | /* Forward the request. */ | |
e75fdfca TT |
2137 | ops = ops->beneath; |
2138 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2139 | } |
2140 | ||
066ce621 MM |
2141 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2142 | is stopped. */ | |
2143 | ||
2144 | static void | |
2145 | record_btrace_set_replay (struct thread_info *tp, | |
2146 | const struct btrace_insn_iterator *it) | |
2147 | { | |
2148 | struct btrace_thread_info *btinfo; | |
2149 | ||
2150 | btinfo = &tp->btrace; | |
2151 | ||
2152 | if (it == NULL || it->function == NULL) | |
52834460 | 2153 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2154 | else |
2155 | { | |
2156 | if (btinfo->replay == NULL) | |
52834460 | 2157 | record_btrace_start_replaying (tp); |
066ce621 MM |
2158 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2159 | return; | |
2160 | ||
2161 | *btinfo->replay = *it; | |
52834460 | 2162 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2163 | } |
2164 | ||
52834460 MM |
2165 | /* Start anew from the new replay position. */ |
2166 | record_btrace_clear_histories (btinfo); | |
066ce621 MM |
2167 | } |
2168 | ||
2169 | /* The to_goto_record_begin method of target record-btrace. */ | |
2170 | ||
2171 | static void | |
08475817 | 2172 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2173 | { |
2174 | struct thread_info *tp; | |
2175 | struct btrace_insn_iterator begin; | |
2176 | ||
2177 | tp = require_btrace_thread (); | |
2178 | ||
2179 | btrace_insn_begin (&begin, &tp->btrace); | |
2180 | record_btrace_set_replay (tp, &begin); | |
2181 | ||
2182 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2183 | } | |
2184 | ||
2185 | /* The to_goto_record_end method of target record-btrace. */ | |
2186 | ||
2187 | static void | |
307a1b91 | 2188 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2189 | { |
2190 | struct thread_info *tp; | |
2191 | ||
2192 | tp = require_btrace_thread (); | |
2193 | ||
2194 | record_btrace_set_replay (tp, NULL); | |
2195 | ||
2196 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2197 | } | |
2198 | ||
2199 | /* The to_goto_record method of target record-btrace. */ | |
2200 | ||
2201 | static void | |
606183ac | 2202 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2203 | { |
2204 | struct thread_info *tp; | |
2205 | struct btrace_insn_iterator it; | |
2206 | unsigned int number; | |
2207 | int found; | |
2208 | ||
2209 | number = insn; | |
2210 | ||
2211 | /* Check for wrap-arounds. */ | |
2212 | if (number != insn) | |
2213 | error (_("Instruction number out of range.")); | |
2214 | ||
2215 | tp = require_btrace_thread (); | |
2216 | ||
2217 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2218 | if (found == 0) | |
2219 | error (_("No such instruction.")); | |
2220 | ||
2221 | record_btrace_set_replay (tp, &it); | |
2222 | ||
2223 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2224 | } | |
2225 | ||
70ad5bff MM |
2226 | /* The to_execution_direction target method. */ |
2227 | ||
2228 | static enum exec_direction_kind | |
2229 | record_btrace_execution_direction (struct target_ops *self) | |
2230 | { | |
2231 | return record_btrace_resume_exec_dir; | |
2232 | } | |
2233 | ||
aef92902 MM |
2234 | /* The to_prepare_to_generate_core target method. */ |
2235 | ||
2236 | static void | |
2237 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2238 | { | |
2239 | record_btrace_generating_corefile = 1; | |
2240 | } | |
2241 | ||
2242 | /* The to_done_generating_core target method. */ | |
2243 | ||
2244 | static void | |
2245 | record_btrace_done_generating_core (struct target_ops *self) | |
2246 | { | |
2247 | record_btrace_generating_corefile = 0; | |
2248 | } | |
2249 | ||
afedecd3 MM |
2250 | /* Initialize the record-btrace target ops. */ |
2251 | ||
2252 | static void | |
2253 | init_record_btrace_ops (void) | |
2254 | { | |
2255 | struct target_ops *ops; | |
2256 | ||
2257 | ops = &record_btrace_ops; | |
2258 | ops->to_shortname = "record-btrace"; | |
2259 | ops->to_longname = "Branch tracing target"; | |
2260 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2261 | ops->to_open = record_btrace_open; | |
2262 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2263 | ops->to_async = record_btrace_async; |
afedecd3 MM |
2264 | ops->to_detach = record_detach; |
2265 | ops->to_disconnect = record_disconnect; | |
2266 | ops->to_mourn_inferior = record_mourn_inferior; | |
2267 | ops->to_kill = record_kill; | |
afedecd3 MM |
2268 | ops->to_stop_recording = record_btrace_stop_recording; |
2269 | ops->to_info_record = record_btrace_info; | |
2270 | ops->to_insn_history = record_btrace_insn_history; | |
2271 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2272 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2273 | ops->to_call_history = record_btrace_call_history; | |
2274 | ops->to_call_history_from = record_btrace_call_history_from; | |
2275 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2276 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
2277 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2278 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2279 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2280 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2281 | ops->to_store_registers = record_btrace_store_registers; | |
2282 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2283 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2284 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2285 | ops->to_resume = record_btrace_resume; |
2286 | ops->to_wait = record_btrace_wait; | |
e8032dde | 2287 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2288 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2289 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2290 | ops->to_goto_record_end = record_btrace_goto_end; | |
2291 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2292 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2293 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2294 | ops->to_supports_stopped_by_sw_breakpoint | |
2295 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2296 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2297 | ops->to_supports_stopped_by_hw_breakpoint | |
2298 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2299 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2300 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2301 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2302 | ops->to_stratum = record_stratum; |
2303 | ops->to_magic = OPS_MAGIC; | |
2304 | } | |
2305 | ||
f4abbc16 MM |
2306 | /* Start recording in BTS format. */ |
2307 | ||
2308 | static void | |
2309 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2310 | { | |
f4abbc16 MM |
2311 | |
2312 | if (args != NULL && *args != 0) | |
2313 | error (_("Invalid argument.")); | |
2314 | ||
2315 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2316 | ||
492d29ea PA |
2317 | TRY |
2318 | { | |
2319 | execute_command ("target record-btrace", from_tty); | |
2320 | } | |
2321 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2322 | { |
2323 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2324 | throw_exception (exception); | |
2325 | } | |
492d29ea | 2326 | END_CATCH |
f4abbc16 MM |
2327 | } |
2328 | ||
afedecd3 MM |
2329 | /* Alias for "target record". */ |
2330 | ||
2331 | static void | |
2332 | cmd_record_btrace_start (char *args, int from_tty) | |
2333 | { | |
f4abbc16 | 2334 | |
afedecd3 MM |
2335 | if (args != NULL && *args != 0) |
2336 | error (_("Invalid argument.")); | |
2337 | ||
f4abbc16 MM |
2338 | record_btrace_conf.format = BTRACE_FORMAT_BTS; |
2339 | ||
492d29ea PA |
2340 | TRY |
2341 | { | |
2342 | execute_command ("target record-btrace", from_tty); | |
2343 | } | |
2344 | CATCH (exception, RETURN_MASK_ALL) | |
2345 | { | |
2346 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2347 | throw_exception (exception); | |
2348 | } | |
2349 | END_CATCH | |
afedecd3 MM |
2350 | } |
2351 | ||
67b5c0c1 MM |
2352 | /* The "set record btrace" command. */ |
2353 | ||
2354 | static void | |
2355 | cmd_set_record_btrace (char *args, int from_tty) | |
2356 | { | |
2357 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2358 | } | |
2359 | ||
2360 | /* The "show record btrace" command. */ | |
2361 | ||
2362 | static void | |
2363 | cmd_show_record_btrace (char *args, int from_tty) | |
2364 | { | |
2365 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2366 | } | |
2367 | ||
2368 | /* The "show record btrace replay-memory-access" command. */ | |
2369 | ||
2370 | static void | |
2371 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2372 | struct cmd_list_element *c, const char *value) | |
2373 | { | |
2374 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2375 | replay_memory_access); | |
2376 | } | |
2377 | ||
d33501a5 MM |
2378 | /* The "set record btrace bts" command. */ |
2379 | ||
2380 | static void | |
2381 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
2382 | { | |
2383 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
2384 | "by an apporpriate subcommand.\n")); | |
2385 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", | |
2386 | all_commands, gdb_stdout); | |
2387 | } | |
2388 | ||
2389 | /* The "show record btrace bts" command. */ | |
2390 | ||
2391 | static void | |
2392 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
2393 | { | |
2394 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
2395 | } | |
2396 | ||
afedecd3 MM |
2397 | void _initialize_record_btrace (void); |
2398 | ||
2399 | /* Initialize btrace commands. */ | |
2400 | ||
2401 | void | |
2402 | _initialize_record_btrace (void) | |
2403 | { | |
f4abbc16 MM |
2404 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
2405 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
2406 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
2407 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
2408 | ||
f4abbc16 MM |
2409 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
2410 | _("\ | |
2411 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
2412 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
2413 | This format may not be available on all processors."), | |
2414 | &record_btrace_cmdlist); | |
2415 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
2416 | ||
67b5c0c1 MM |
2417 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
2418 | _("Set record options"), &set_record_btrace_cmdlist, | |
2419 | "set record btrace ", 0, &set_record_cmdlist); | |
2420 | ||
2421 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
2422 | _("Show record options"), &show_record_btrace_cmdlist, | |
2423 | "show record btrace ", 0, &show_record_cmdlist); | |
2424 | ||
2425 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
2426 | replay_memory_access_types, &replay_memory_access, _("\ | |
2427 | Set what memory accesses are allowed during replay."), _("\ | |
2428 | Show what memory accesses are allowed during replay."), | |
2429 | _("Default is READ-ONLY.\n\n\ | |
2430 | The btrace record target does not trace data.\n\ | |
2431 | The memory therefore corresponds to the live target and not \ | |
2432 | to the current replay position.\n\n\ | |
2433 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
2434 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
2435 | replay."), | |
2436 | NULL, cmd_show_replay_memory_access, | |
2437 | &set_record_btrace_cmdlist, | |
2438 | &show_record_btrace_cmdlist); | |
2439 | ||
d33501a5 MM |
2440 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
2441 | _("Set record btrace bts options"), | |
2442 | &set_record_btrace_bts_cmdlist, | |
2443 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
2444 | ||
2445 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
2446 | _("Show record btrace bts options"), | |
2447 | &show_record_btrace_bts_cmdlist, | |
2448 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
2449 | ||
2450 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2451 | &record_btrace_conf.bts.size, | |
2452 | _("Set the record/replay bts buffer size."), | |
2453 | _("Show the record/replay bts buffer size."), _("\ | |
2454 | When starting recording request a trace buffer of this size. \ | |
2455 | The actual buffer size may differ from the requested size. \ | |
2456 | Use \"info record\" to see the actual buffer size.\n\n\ | |
2457 | Bigger buffers allow longer recording but also take more time to process \ | |
2458 | the recorded execution trace.\n\n\ | |
2459 | The trace buffer size may not be changed while recording."), NULL, NULL, | |
2460 | &set_record_btrace_bts_cmdlist, | |
2461 | &show_record_btrace_bts_cmdlist); | |
2462 | ||
afedecd3 MM |
2463 | init_record_btrace_ops (); |
2464 | add_target (&record_btrace_ops); | |
0b722aec MM |
2465 | |
2466 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
2467 | xcalloc, xfree); | |
d33501a5 MM |
2468 | |
2469 | record_btrace_conf.bts.size = 64 * 1024; | |
afedecd3 | 2470 | } |