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 | { | |
142 | volatile struct gdb_exception error; | |
143 | ||
144 | TRY_CATCH (error, RETURN_MASK_ERROR) | |
f4abbc16 | 145 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
146 | |
147 | if (error.message != NULL) | |
148 | warning ("%s", error.message); | |
149 | } | |
150 | ||
151 | /* Callback function to disable branch tracing for one thread. */ | |
152 | ||
153 | static void | |
154 | record_btrace_disable_callback (void *arg) | |
155 | { | |
156 | struct thread_info *tp; | |
157 | ||
158 | tp = arg; | |
159 | ||
160 | btrace_disable (tp); | |
161 | } | |
162 | ||
163 | /* Enable automatic tracing of new threads. */ | |
164 | ||
165 | static void | |
166 | record_btrace_auto_enable (void) | |
167 | { | |
168 | DEBUG ("attach thread observer"); | |
169 | ||
170 | record_btrace_thread_observer | |
171 | = observer_attach_new_thread (record_btrace_enable_warn); | |
172 | } | |
173 | ||
174 | /* Disable automatic tracing of new threads. */ | |
175 | ||
176 | static void | |
177 | record_btrace_auto_disable (void) | |
178 | { | |
179 | /* The observer may have been detached, already. */ | |
180 | if (record_btrace_thread_observer == NULL) | |
181 | return; | |
182 | ||
183 | DEBUG ("detach thread observer"); | |
184 | ||
185 | observer_detach_new_thread (record_btrace_thread_observer); | |
186 | record_btrace_thread_observer = NULL; | |
187 | } | |
188 | ||
70ad5bff MM |
189 | /* The record-btrace async event handler function. */ |
190 | ||
191 | static void | |
192 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
193 | { | |
194 | inferior_event_handler (INF_REG_EVENT, NULL); | |
195 | } | |
196 | ||
afedecd3 MM |
197 | /* The to_open method of target record-btrace. */ |
198 | ||
199 | static void | |
014f9477 | 200 | record_btrace_open (const char *args, int from_tty) |
afedecd3 MM |
201 | { |
202 | struct cleanup *disable_chain; | |
203 | struct thread_info *tp; | |
204 | ||
205 | DEBUG ("open"); | |
206 | ||
8213266a | 207 | record_preopen (); |
afedecd3 MM |
208 | |
209 | if (!target_has_execution) | |
210 | error (_("The program is not being run.")); | |
211 | ||
52834460 MM |
212 | if (non_stop) |
213 | error (_("Record btrace can't debug inferior in non-stop mode.")); | |
214 | ||
afedecd3 MM |
215 | gdb_assert (record_btrace_thread_observer == NULL); |
216 | ||
217 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 218 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
219 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->num)) |
220 | { | |
f4abbc16 | 221 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
222 | |
223 | make_cleanup (record_btrace_disable_callback, tp); | |
224 | } | |
225 | ||
226 | record_btrace_auto_enable (); | |
227 | ||
228 | push_target (&record_btrace_ops); | |
229 | ||
70ad5bff MM |
230 | record_btrace_async_inferior_event_handler |
231 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
232 | NULL); | |
aef92902 | 233 | record_btrace_generating_corefile = 0; |
70ad5bff | 234 | |
afedecd3 MM |
235 | observer_notify_record_changed (current_inferior (), 1); |
236 | ||
237 | discard_cleanups (disable_chain); | |
238 | } | |
239 | ||
240 | /* The to_stop_recording method of target record-btrace. */ | |
241 | ||
242 | static void | |
c6cd7c02 | 243 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
244 | { |
245 | struct thread_info *tp; | |
246 | ||
247 | DEBUG ("stop recording"); | |
248 | ||
249 | record_btrace_auto_disable (); | |
250 | ||
034f788c | 251 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
252 | if (tp->btrace.target != NULL) |
253 | btrace_disable (tp); | |
254 | } | |
255 | ||
256 | /* The to_close method of target record-btrace. */ | |
257 | ||
258 | static void | |
de90e03d | 259 | record_btrace_close (struct target_ops *self) |
afedecd3 | 260 | { |
568e808b MM |
261 | struct thread_info *tp; |
262 | ||
70ad5bff MM |
263 | if (record_btrace_async_inferior_event_handler != NULL) |
264 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
265 | ||
99c819ee MM |
266 | /* Make sure automatic recording gets disabled even if we did not stop |
267 | recording before closing the record-btrace target. */ | |
268 | record_btrace_auto_disable (); | |
269 | ||
568e808b MM |
270 | /* We should have already stopped recording. |
271 | Tear down btrace in case we have not. */ | |
034f788c | 272 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 273 | btrace_teardown (tp); |
afedecd3 MM |
274 | } |
275 | ||
b7d2e916 PA |
276 | /* The to_async method of target record-btrace. */ |
277 | ||
278 | static void | |
279 | record_btrace_async (struct target_ops *ops, | |
280 | void (*callback) (enum inferior_event_type event_type, | |
281 | void *context), | |
282 | void *context) | |
283 | { | |
284 | if (callback != NULL) | |
285 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
286 | else | |
287 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
288 | ||
289 | ops->beneath->to_async (ops->beneath, callback, context); | |
290 | } | |
291 | ||
d33501a5 MM |
292 | /* Adjusts the size and returns a human readable size suffix. */ |
293 | ||
294 | static const char * | |
295 | record_btrace_adjust_size (unsigned int *size) | |
296 | { | |
297 | unsigned int sz; | |
298 | ||
299 | sz = *size; | |
300 | ||
301 | if ((sz & ((1u << 30) - 1)) == 0) | |
302 | { | |
303 | *size = sz >> 30; | |
304 | return "GB"; | |
305 | } | |
306 | else if ((sz & ((1u << 20) - 1)) == 0) | |
307 | { | |
308 | *size = sz >> 20; | |
309 | return "MB"; | |
310 | } | |
311 | else if ((sz & ((1u << 10) - 1)) == 0) | |
312 | { | |
313 | *size = sz >> 10; | |
314 | return "kB"; | |
315 | } | |
316 | else | |
317 | return ""; | |
318 | } | |
319 | ||
320 | /* Print a BTS configuration. */ | |
321 | ||
322 | static void | |
323 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
324 | { | |
325 | const char *suffix; | |
326 | unsigned int size; | |
327 | ||
328 | size = conf->size; | |
329 | if (size > 0) | |
330 | { | |
331 | suffix = record_btrace_adjust_size (&size); | |
332 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
333 | } | |
334 | } | |
335 | ||
336 | /* Print a branch tracing configuration. */ | |
337 | ||
338 | static void | |
339 | record_btrace_print_conf (const struct btrace_config *conf) | |
340 | { | |
341 | printf_unfiltered (_("Recording format: %s.\n"), | |
342 | btrace_format_string (conf->format)); | |
343 | ||
344 | switch (conf->format) | |
345 | { | |
346 | case BTRACE_FORMAT_NONE: | |
347 | return; | |
348 | ||
349 | case BTRACE_FORMAT_BTS: | |
350 | record_btrace_print_bts_conf (&conf->bts); | |
351 | return; | |
352 | } | |
353 | ||
354 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
355 | } | |
356 | ||
afedecd3 MM |
357 | /* The to_info_record method of target record-btrace. */ |
358 | ||
359 | static void | |
630d6a4a | 360 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
361 | { |
362 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 363 | const struct btrace_config *conf; |
afedecd3 | 364 | struct thread_info *tp; |
31fd9caa | 365 | unsigned int insns, calls, gaps; |
afedecd3 MM |
366 | |
367 | DEBUG ("info"); | |
368 | ||
369 | tp = find_thread_ptid (inferior_ptid); | |
370 | if (tp == NULL) | |
371 | error (_("No thread.")); | |
372 | ||
f4abbc16 MM |
373 | btinfo = &tp->btrace; |
374 | ||
375 | conf = btrace_conf (btinfo); | |
376 | if (conf != NULL) | |
d33501a5 | 377 | record_btrace_print_conf (conf); |
f4abbc16 | 378 | |
afedecd3 MM |
379 | btrace_fetch (tp); |
380 | ||
23a7fe75 MM |
381 | insns = 0; |
382 | calls = 0; | |
31fd9caa | 383 | gaps = 0; |
23a7fe75 | 384 | |
6e07b1d2 | 385 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
386 | { |
387 | struct btrace_call_iterator call; | |
388 | struct btrace_insn_iterator insn; | |
389 | ||
390 | btrace_call_end (&call, btinfo); | |
391 | btrace_call_prev (&call, 1); | |
5de9129b | 392 | calls = btrace_call_number (&call); |
23a7fe75 MM |
393 | |
394 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 395 | |
5de9129b | 396 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
397 | if (insns != 0) |
398 | { | |
399 | /* The last instruction does not really belong to the trace. */ | |
400 | insns -= 1; | |
401 | } | |
402 | else | |
403 | { | |
404 | unsigned int steps; | |
405 | ||
406 | /* Skip gaps at the end. */ | |
407 | do | |
408 | { | |
409 | steps = btrace_insn_prev (&insn, 1); | |
410 | if (steps == 0) | |
411 | break; | |
412 | ||
413 | insns = btrace_insn_number (&insn); | |
414 | } | |
415 | while (insns == 0); | |
416 | } | |
417 | ||
418 | gaps = btinfo->ngaps; | |
23a7fe75 | 419 | } |
afedecd3 | 420 | |
31fd9caa MM |
421 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
422 | "for thread %d (%s).\n"), insns, calls, gaps, | |
423 | tp->num, target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
424 | |
425 | if (btrace_is_replaying (tp)) | |
426 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
427 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
428 | } |
429 | ||
31fd9caa MM |
430 | /* Print a decode error. */ |
431 | ||
432 | static void | |
433 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
434 | enum btrace_format format) | |
435 | { | |
436 | const char *errstr; | |
437 | int is_error; | |
438 | ||
439 | errstr = _("unknown"); | |
440 | is_error = 1; | |
441 | ||
442 | switch (format) | |
443 | { | |
444 | default: | |
445 | break; | |
446 | ||
447 | case BTRACE_FORMAT_BTS: | |
448 | switch (errcode) | |
449 | { | |
450 | default: | |
451 | break; | |
452 | ||
453 | case BDE_BTS_OVERFLOW: | |
454 | errstr = _("instruction overflow"); | |
455 | break; | |
456 | ||
457 | case BDE_BTS_INSN_SIZE: | |
458 | errstr = _("unknown instruction"); | |
459 | break; | |
460 | } | |
461 | break; | |
462 | } | |
463 | ||
464 | ui_out_text (uiout, _("[")); | |
465 | if (is_error) | |
466 | { | |
467 | ui_out_text (uiout, _("decode error (")); | |
468 | ui_out_field_int (uiout, "errcode", errcode); | |
469 | ui_out_text (uiout, _("): ")); | |
470 | } | |
471 | ui_out_text (uiout, errstr); | |
472 | ui_out_text (uiout, _("]\n")); | |
473 | } | |
474 | ||
afedecd3 MM |
475 | /* Print an unsigned int. */ |
476 | ||
477 | static void | |
478 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
479 | { | |
480 | ui_out_field_fmt (uiout, fld, "%u", val); | |
481 | } | |
482 | ||
483 | /* Disassemble a section of the recorded instruction trace. */ | |
484 | ||
485 | static void | |
23a7fe75 | 486 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 487 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
488 | const struct btrace_insn_iterator *begin, |
489 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 MM |
490 | { |
491 | struct gdbarch *gdbarch; | |
23a7fe75 | 492 | struct btrace_insn_iterator it; |
afedecd3 | 493 | |
23a7fe75 MM |
494 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
495 | btrace_insn_number (end)); | |
afedecd3 MM |
496 | |
497 | gdbarch = target_gdbarch (); | |
498 | ||
23a7fe75 | 499 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 500 | { |
23a7fe75 MM |
501 | const struct btrace_insn *insn; |
502 | ||
503 | insn = btrace_insn_get (&it); | |
504 | ||
31fd9caa MM |
505 | /* A NULL instruction indicates a gap in the trace. */ |
506 | if (insn == NULL) | |
507 | { | |
508 | const struct btrace_config *conf; | |
509 | ||
510 | conf = btrace_conf (btinfo); | |
afedecd3 | 511 | |
31fd9caa MM |
512 | /* We have trace so we must have a configuration. */ |
513 | gdb_assert (conf != NULL); | |
514 | ||
515 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
516 | conf->format); | |
517 | } | |
518 | else | |
519 | { | |
520 | /* Print the instruction index. */ | |
521 | ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); | |
522 | ui_out_text (uiout, "\t"); | |
523 | ||
524 | /* Disassembly with '/m' flag may not produce the expected result. | |
525 | See PR gdb/11833. */ | |
526 | gdb_disassembly (gdbarch, uiout, NULL, flags, 1, insn->pc, | |
527 | insn->pc + 1); | |
528 | } | |
afedecd3 MM |
529 | } |
530 | } | |
531 | ||
532 | /* The to_insn_history method of target record-btrace. */ | |
533 | ||
534 | static void | |
7a6c5609 | 535 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
536 | { |
537 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
538 | struct btrace_insn_history *history; |
539 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
540 | struct cleanup *uiout_cleanup; |
541 | struct ui_out *uiout; | |
23a7fe75 | 542 | unsigned int context, covered; |
afedecd3 MM |
543 | |
544 | uiout = current_uiout; | |
545 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
546 | "insn history"); | |
afedecd3 | 547 | context = abs (size); |
afedecd3 MM |
548 | if (context == 0) |
549 | error (_("Bad record instruction-history-size.")); | |
550 | ||
23a7fe75 MM |
551 | btinfo = require_btrace (); |
552 | history = btinfo->insn_history; | |
553 | if (history == NULL) | |
afedecd3 | 554 | { |
07bbe694 | 555 | struct btrace_insn_iterator *replay; |
afedecd3 | 556 | |
23a7fe75 | 557 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 558 | |
07bbe694 MM |
559 | /* If we're replaying, we start at the replay position. Otherwise, we |
560 | start at the tail of the trace. */ | |
561 | replay = btinfo->replay; | |
562 | if (replay != NULL) | |
563 | begin = *replay; | |
564 | else | |
565 | btrace_insn_end (&begin, btinfo); | |
566 | ||
567 | /* We start from here and expand in the requested direction. Then we | |
568 | expand in the other direction, as well, to fill up any remaining | |
569 | context. */ | |
570 | end = begin; | |
571 | if (size < 0) | |
572 | { | |
573 | /* We want the current position covered, as well. */ | |
574 | covered = btrace_insn_next (&end, 1); | |
575 | covered += btrace_insn_prev (&begin, context - covered); | |
576 | covered += btrace_insn_next (&end, context - covered); | |
577 | } | |
578 | else | |
579 | { | |
580 | covered = btrace_insn_next (&end, context); | |
581 | covered += btrace_insn_prev (&begin, context - covered); | |
582 | } | |
afedecd3 MM |
583 | } |
584 | else | |
585 | { | |
23a7fe75 MM |
586 | begin = history->begin; |
587 | end = history->end; | |
afedecd3 | 588 | |
23a7fe75 MM |
589 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
590 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 591 | |
23a7fe75 MM |
592 | if (size < 0) |
593 | { | |
594 | end = begin; | |
595 | covered = btrace_insn_prev (&begin, context); | |
596 | } | |
597 | else | |
598 | { | |
599 | begin = end; | |
600 | covered = btrace_insn_next (&end, context); | |
601 | } | |
afedecd3 MM |
602 | } |
603 | ||
23a7fe75 | 604 | if (covered > 0) |
31fd9caa | 605 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
606 | else |
607 | { | |
608 | if (size < 0) | |
609 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
610 | else | |
611 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
612 | } | |
afedecd3 | 613 | |
23a7fe75 | 614 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
615 | do_cleanups (uiout_cleanup); |
616 | } | |
617 | ||
618 | /* The to_insn_history_range method of target record-btrace. */ | |
619 | ||
620 | static void | |
4e99c6b7 TT |
621 | record_btrace_insn_history_range (struct target_ops *self, |
622 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
623 | { |
624 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
625 | struct btrace_insn_history *history; |
626 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
627 | struct cleanup *uiout_cleanup; |
628 | struct ui_out *uiout; | |
23a7fe75 MM |
629 | unsigned int low, high; |
630 | int found; | |
afedecd3 MM |
631 | |
632 | uiout = current_uiout; | |
633 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
634 | "insn history"); | |
23a7fe75 MM |
635 | low = from; |
636 | high = to; | |
afedecd3 | 637 | |
23a7fe75 | 638 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
639 | |
640 | /* Check for wrap-arounds. */ | |
23a7fe75 | 641 | if (low != from || high != to) |
afedecd3 MM |
642 | error (_("Bad range.")); |
643 | ||
0688d04e | 644 | if (high < low) |
afedecd3 MM |
645 | error (_("Bad range.")); |
646 | ||
23a7fe75 | 647 | btinfo = require_btrace (); |
afedecd3 | 648 | |
23a7fe75 MM |
649 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
650 | if (found == 0) | |
651 | error (_("Range out of bounds.")); | |
afedecd3 | 652 | |
23a7fe75 MM |
653 | found = btrace_find_insn_by_number (&end, btinfo, high); |
654 | if (found == 0) | |
0688d04e MM |
655 | { |
656 | /* Silently truncate the range. */ | |
657 | btrace_insn_end (&end, btinfo); | |
658 | } | |
659 | else | |
660 | { | |
661 | /* We want both begin and end to be inclusive. */ | |
662 | btrace_insn_next (&end, 1); | |
663 | } | |
afedecd3 | 664 | |
31fd9caa | 665 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 666 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
667 | |
668 | do_cleanups (uiout_cleanup); | |
669 | } | |
670 | ||
671 | /* The to_insn_history_from method of target record-btrace. */ | |
672 | ||
673 | static void | |
9abc3ff3 TT |
674 | record_btrace_insn_history_from (struct target_ops *self, |
675 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
676 | { |
677 | ULONGEST begin, end, context; | |
678 | ||
679 | context = abs (size); | |
0688d04e MM |
680 | if (context == 0) |
681 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
682 | |
683 | if (size < 0) | |
684 | { | |
685 | end = from; | |
686 | ||
687 | if (from < context) | |
688 | begin = 0; | |
689 | else | |
0688d04e | 690 | begin = from - context + 1; |
afedecd3 MM |
691 | } |
692 | else | |
693 | { | |
694 | begin = from; | |
0688d04e | 695 | end = from + context - 1; |
afedecd3 MM |
696 | |
697 | /* Check for wrap-around. */ | |
698 | if (end < begin) | |
699 | end = ULONGEST_MAX; | |
700 | } | |
701 | ||
4e99c6b7 | 702 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
703 | } |
704 | ||
705 | /* Print the instruction number range for a function call history line. */ | |
706 | ||
707 | static void | |
23a7fe75 MM |
708 | btrace_call_history_insn_range (struct ui_out *uiout, |
709 | const struct btrace_function *bfun) | |
afedecd3 | 710 | { |
7acbe133 MM |
711 | unsigned int begin, end, size; |
712 | ||
713 | size = VEC_length (btrace_insn_s, bfun->insn); | |
714 | gdb_assert (size > 0); | |
afedecd3 | 715 | |
23a7fe75 | 716 | begin = bfun->insn_offset; |
7acbe133 | 717 | end = begin + size - 1; |
afedecd3 | 718 | |
23a7fe75 | 719 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 720 | ui_out_text (uiout, ","); |
23a7fe75 | 721 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
722 | } |
723 | ||
724 | /* Print the source line information for a function call history line. */ | |
725 | ||
726 | static void | |
23a7fe75 MM |
727 | btrace_call_history_src_line (struct ui_out *uiout, |
728 | const struct btrace_function *bfun) | |
afedecd3 MM |
729 | { |
730 | struct symbol *sym; | |
23a7fe75 | 731 | int begin, end; |
afedecd3 MM |
732 | |
733 | sym = bfun->sym; | |
734 | if (sym == NULL) | |
735 | return; | |
736 | ||
737 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 738 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 739 | |
23a7fe75 MM |
740 | begin = bfun->lbegin; |
741 | end = bfun->lend; | |
742 | ||
743 | if (end < begin) | |
afedecd3 MM |
744 | return; |
745 | ||
746 | ui_out_text (uiout, ":"); | |
23a7fe75 | 747 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 748 | |
23a7fe75 | 749 | if (end == begin) |
afedecd3 MM |
750 | return; |
751 | ||
8710b709 | 752 | ui_out_text (uiout, ","); |
23a7fe75 | 753 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
754 | } |
755 | ||
0b722aec MM |
756 | /* Get the name of a branch trace function. */ |
757 | ||
758 | static const char * | |
759 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
760 | { | |
761 | struct minimal_symbol *msym; | |
762 | struct symbol *sym; | |
763 | ||
764 | if (bfun == NULL) | |
765 | return "??"; | |
766 | ||
767 | msym = bfun->msym; | |
768 | sym = bfun->sym; | |
769 | ||
770 | if (sym != NULL) | |
771 | return SYMBOL_PRINT_NAME (sym); | |
772 | else if (msym != NULL) | |
efd66ac6 | 773 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
774 | else |
775 | return "??"; | |
776 | } | |
777 | ||
afedecd3 MM |
778 | /* Disassemble a section of the recorded function trace. */ |
779 | ||
780 | static void | |
23a7fe75 | 781 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 782 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
783 | const struct btrace_call_iterator *begin, |
784 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
785 | enum record_print_flag flags) |
786 | { | |
23a7fe75 | 787 | struct btrace_call_iterator it; |
afedecd3 | 788 | |
23a7fe75 MM |
789 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
790 | btrace_call_number (end)); | |
afedecd3 | 791 | |
23a7fe75 | 792 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 793 | { |
23a7fe75 MM |
794 | const struct btrace_function *bfun; |
795 | struct minimal_symbol *msym; | |
796 | struct symbol *sym; | |
797 | ||
798 | bfun = btrace_call_get (&it); | |
23a7fe75 | 799 | sym = bfun->sym; |
0b722aec | 800 | msym = bfun->msym; |
23a7fe75 | 801 | |
afedecd3 | 802 | /* Print the function index. */ |
23a7fe75 | 803 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
804 | ui_out_text (uiout, "\t"); |
805 | ||
31fd9caa MM |
806 | /* Indicate gaps in the trace. */ |
807 | if (bfun->errcode != 0) | |
808 | { | |
809 | const struct btrace_config *conf; | |
810 | ||
811 | conf = btrace_conf (btinfo); | |
812 | ||
813 | /* We have trace so we must have a configuration. */ | |
814 | gdb_assert (conf != NULL); | |
815 | ||
816 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
817 | ||
818 | continue; | |
819 | } | |
820 | ||
8710b709 MM |
821 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
822 | { | |
823 | int level = bfun->level + btinfo->level, i; | |
824 | ||
825 | for (i = 0; i < level; ++i) | |
826 | ui_out_text (uiout, " "); | |
827 | } | |
828 | ||
829 | if (sym != NULL) | |
830 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
831 | else if (msym != NULL) | |
efd66ac6 | 832 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
833 | else if (!ui_out_is_mi_like_p (uiout)) |
834 | ui_out_field_string (uiout, "function", "??"); | |
835 | ||
1e038f67 | 836 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 837 | { |
8710b709 | 838 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 839 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
840 | } |
841 | ||
1e038f67 | 842 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 843 | { |
8710b709 | 844 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 845 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
846 | } |
847 | ||
afedecd3 MM |
848 | ui_out_text (uiout, "\n"); |
849 | } | |
850 | } | |
851 | ||
852 | /* The to_call_history method of target record-btrace. */ | |
853 | ||
854 | static void | |
5df2fcba | 855 | record_btrace_call_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
856 | { |
857 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
858 | struct btrace_call_history *history; |
859 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
860 | struct cleanup *uiout_cleanup; |
861 | struct ui_out *uiout; | |
23a7fe75 | 862 | unsigned int context, covered; |
afedecd3 MM |
863 | |
864 | uiout = current_uiout; | |
865 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
866 | "insn history"); | |
afedecd3 | 867 | context = abs (size); |
afedecd3 MM |
868 | if (context == 0) |
869 | error (_("Bad record function-call-history-size.")); | |
870 | ||
23a7fe75 MM |
871 | btinfo = require_btrace (); |
872 | history = btinfo->call_history; | |
873 | if (history == NULL) | |
afedecd3 | 874 | { |
07bbe694 | 875 | struct btrace_insn_iterator *replay; |
afedecd3 | 876 | |
23a7fe75 | 877 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 878 | |
07bbe694 MM |
879 | /* If we're replaying, we start at the replay position. Otherwise, we |
880 | start at the tail of the trace. */ | |
881 | replay = btinfo->replay; | |
882 | if (replay != NULL) | |
883 | { | |
884 | begin.function = replay->function; | |
885 | begin.btinfo = btinfo; | |
886 | } | |
887 | else | |
888 | btrace_call_end (&begin, btinfo); | |
889 | ||
890 | /* We start from here and expand in the requested direction. Then we | |
891 | expand in the other direction, as well, to fill up any remaining | |
892 | context. */ | |
893 | end = begin; | |
894 | if (size < 0) | |
895 | { | |
896 | /* We want the current position covered, as well. */ | |
897 | covered = btrace_call_next (&end, 1); | |
898 | covered += btrace_call_prev (&begin, context - covered); | |
899 | covered += btrace_call_next (&end, context - covered); | |
900 | } | |
901 | else | |
902 | { | |
903 | covered = btrace_call_next (&end, context); | |
904 | covered += btrace_call_prev (&begin, context- covered); | |
905 | } | |
afedecd3 MM |
906 | } |
907 | else | |
908 | { | |
23a7fe75 MM |
909 | begin = history->begin; |
910 | end = history->end; | |
afedecd3 | 911 | |
23a7fe75 MM |
912 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
913 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 914 | |
23a7fe75 MM |
915 | if (size < 0) |
916 | { | |
917 | end = begin; | |
918 | covered = btrace_call_prev (&begin, context); | |
919 | } | |
920 | else | |
921 | { | |
922 | begin = end; | |
923 | covered = btrace_call_next (&end, context); | |
924 | } | |
afedecd3 MM |
925 | } |
926 | ||
23a7fe75 | 927 | if (covered > 0) |
8710b709 | 928 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
929 | else |
930 | { | |
931 | if (size < 0) | |
932 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
933 | else | |
934 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
935 | } | |
afedecd3 | 936 | |
23a7fe75 | 937 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
938 | do_cleanups (uiout_cleanup); |
939 | } | |
940 | ||
941 | /* The to_call_history_range method of target record-btrace. */ | |
942 | ||
943 | static void | |
f0d960ea TT |
944 | record_btrace_call_history_range (struct target_ops *self, |
945 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
946 | { |
947 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
948 | struct btrace_call_history *history; |
949 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
950 | struct cleanup *uiout_cleanup; |
951 | struct ui_out *uiout; | |
23a7fe75 MM |
952 | unsigned int low, high; |
953 | int found; | |
afedecd3 MM |
954 | |
955 | uiout = current_uiout; | |
956 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
957 | "func history"); | |
23a7fe75 MM |
958 | low = from; |
959 | high = to; | |
afedecd3 | 960 | |
23a7fe75 | 961 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
962 | |
963 | /* Check for wrap-arounds. */ | |
23a7fe75 | 964 | if (low != from || high != to) |
afedecd3 MM |
965 | error (_("Bad range.")); |
966 | ||
0688d04e | 967 | if (high < low) |
afedecd3 MM |
968 | error (_("Bad range.")); |
969 | ||
23a7fe75 | 970 | btinfo = require_btrace (); |
afedecd3 | 971 | |
23a7fe75 MM |
972 | found = btrace_find_call_by_number (&begin, btinfo, low); |
973 | if (found == 0) | |
974 | error (_("Range out of bounds.")); | |
afedecd3 | 975 | |
23a7fe75 MM |
976 | found = btrace_find_call_by_number (&end, btinfo, high); |
977 | if (found == 0) | |
0688d04e MM |
978 | { |
979 | /* Silently truncate the range. */ | |
980 | btrace_call_end (&end, btinfo); | |
981 | } | |
982 | else | |
983 | { | |
984 | /* We want both begin and end to be inclusive. */ | |
985 | btrace_call_next (&end, 1); | |
986 | } | |
afedecd3 | 987 | |
8710b709 | 988 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 989 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
990 | |
991 | do_cleanups (uiout_cleanup); | |
992 | } | |
993 | ||
994 | /* The to_call_history_from method of target record-btrace. */ | |
995 | ||
996 | static void | |
ec0aea04 TT |
997 | record_btrace_call_history_from (struct target_ops *self, |
998 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
999 | { |
1000 | ULONGEST begin, end, context; | |
1001 | ||
1002 | context = abs (size); | |
0688d04e MM |
1003 | if (context == 0) |
1004 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1005 | |
1006 | if (size < 0) | |
1007 | { | |
1008 | end = from; | |
1009 | ||
1010 | if (from < context) | |
1011 | begin = 0; | |
1012 | else | |
0688d04e | 1013 | begin = from - context + 1; |
afedecd3 MM |
1014 | } |
1015 | else | |
1016 | { | |
1017 | begin = from; | |
0688d04e | 1018 | end = from + context - 1; |
afedecd3 MM |
1019 | |
1020 | /* Check for wrap-around. */ | |
1021 | if (end < begin) | |
1022 | end = ULONGEST_MAX; | |
1023 | } | |
1024 | ||
f0d960ea | 1025 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1026 | } |
1027 | ||
07bbe694 MM |
1028 | /* The to_record_is_replaying method of target record-btrace. */ |
1029 | ||
1030 | static int | |
1c63c994 | 1031 | record_btrace_is_replaying (struct target_ops *self) |
07bbe694 MM |
1032 | { |
1033 | struct thread_info *tp; | |
1034 | ||
034f788c | 1035 | ALL_NON_EXITED_THREADS (tp) |
07bbe694 MM |
1036 | if (btrace_is_replaying (tp)) |
1037 | return 1; | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
633785ff MM |
1042 | /* The to_xfer_partial method of target record-btrace. */ |
1043 | ||
9b409511 | 1044 | static enum target_xfer_status |
633785ff MM |
1045 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1046 | const char *annex, gdb_byte *readbuf, | |
1047 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1048 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1049 | { |
1050 | struct target_ops *t; | |
1051 | ||
1052 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1053 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1054 | && !record_btrace_generating_corefile |
67b5c0c1 | 1055 | && record_btrace_is_replaying (ops)) |
633785ff MM |
1056 | { |
1057 | switch (object) | |
1058 | { | |
1059 | case TARGET_OBJECT_MEMORY: | |
1060 | { | |
1061 | struct target_section *section; | |
1062 | ||
1063 | /* We do not allow writing memory in general. */ | |
1064 | if (writebuf != NULL) | |
9b409511 YQ |
1065 | { |
1066 | *xfered_len = len; | |
bc113b4e | 1067 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1068 | } |
633785ff MM |
1069 | |
1070 | /* We allow reading readonly memory. */ | |
1071 | section = target_section_by_addr (ops, offset); | |
1072 | if (section != NULL) | |
1073 | { | |
1074 | /* Check if the section we found is readonly. */ | |
1075 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1076 | section->the_bfd_section) | |
1077 | & SEC_READONLY) != 0) | |
1078 | { | |
1079 | /* Truncate the request to fit into this section. */ | |
1080 | len = min (len, section->endaddr - offset); | |
1081 | break; | |
1082 | } | |
1083 | } | |
1084 | ||
9b409511 | 1085 | *xfered_len = len; |
bc113b4e | 1086 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1087 | } |
1088 | } | |
1089 | } | |
1090 | ||
1091 | /* Forward the request. */ | |
e75fdfca TT |
1092 | ops = ops->beneath; |
1093 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1094 | offset, len, xfered_len); | |
633785ff MM |
1095 | } |
1096 | ||
1097 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1098 | ||
1099 | static int | |
1100 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1101 | struct gdbarch *gdbarch, | |
1102 | struct bp_target_info *bp_tgt) | |
1103 | { | |
1104 | volatile struct gdb_exception except; | |
67b5c0c1 MM |
1105 | const char *old; |
1106 | int ret; | |
633785ff MM |
1107 | |
1108 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1109 | duration of this function. */ | |
67b5c0c1 MM |
1110 | old = replay_memory_access; |
1111 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1112 | |
1113 | ret = 0; | |
1114 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 1115 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff | 1116 | |
67b5c0c1 | 1117 | replay_memory_access = old; |
633785ff MM |
1118 | |
1119 | if (except.reason < 0) | |
1120 | throw_exception (except); | |
1121 | ||
1122 | return ret; | |
1123 | } | |
1124 | ||
1125 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1126 | ||
1127 | static int | |
1128 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1129 | struct gdbarch *gdbarch, | |
1130 | struct bp_target_info *bp_tgt) | |
1131 | { | |
1132 | volatile struct gdb_exception except; | |
67b5c0c1 MM |
1133 | const char *old; |
1134 | int ret; | |
633785ff MM |
1135 | |
1136 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1137 | duration of this function. */ | |
67b5c0c1 MM |
1138 | old = replay_memory_access; |
1139 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1140 | |
1141 | ret = 0; | |
1142 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 1143 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff | 1144 | |
67b5c0c1 | 1145 | replay_memory_access = old; |
633785ff MM |
1146 | |
1147 | if (except.reason < 0) | |
1148 | throw_exception (except); | |
1149 | ||
1150 | return ret; | |
1151 | } | |
1152 | ||
1f3ef581 MM |
1153 | /* The to_fetch_registers method of target record-btrace. */ |
1154 | ||
1155 | static void | |
1156 | record_btrace_fetch_registers (struct target_ops *ops, | |
1157 | struct regcache *regcache, int regno) | |
1158 | { | |
1159 | struct btrace_insn_iterator *replay; | |
1160 | struct thread_info *tp; | |
1161 | ||
1162 | tp = find_thread_ptid (inferior_ptid); | |
1163 | gdb_assert (tp != NULL); | |
1164 | ||
1165 | replay = tp->btrace.replay; | |
aef92902 | 1166 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1167 | { |
1168 | const struct btrace_insn *insn; | |
1169 | struct gdbarch *gdbarch; | |
1170 | int pcreg; | |
1171 | ||
1172 | gdbarch = get_regcache_arch (regcache); | |
1173 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1174 | if (pcreg < 0) | |
1175 | return; | |
1176 | ||
1177 | /* We can only provide the PC register. */ | |
1178 | if (regno >= 0 && regno != pcreg) | |
1179 | return; | |
1180 | ||
1181 | insn = btrace_insn_get (replay); | |
1182 | gdb_assert (insn != NULL); | |
1183 | ||
1184 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1185 | } | |
1186 | else | |
1187 | { | |
e75fdfca | 1188 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1189 | |
e75fdfca | 1190 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1191 | } |
1192 | } | |
1193 | ||
1194 | /* The to_store_registers method of target record-btrace. */ | |
1195 | ||
1196 | static void | |
1197 | record_btrace_store_registers (struct target_ops *ops, | |
1198 | struct regcache *regcache, int regno) | |
1199 | { | |
1200 | struct target_ops *t; | |
1201 | ||
aef92902 | 1202 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1203 | error (_("This record target does not allow writing registers.")); |
1204 | ||
1205 | gdb_assert (may_write_registers != 0); | |
1206 | ||
e75fdfca TT |
1207 | t = ops->beneath; |
1208 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1209 | } |
1210 | ||
1211 | /* The to_prepare_to_store method of target record-btrace. */ | |
1212 | ||
1213 | static void | |
1214 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1215 | struct regcache *regcache) | |
1216 | { | |
1217 | struct target_ops *t; | |
1218 | ||
aef92902 | 1219 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1220 | return; |
1221 | ||
e75fdfca TT |
1222 | t = ops->beneath; |
1223 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1224 | } |
1225 | ||
0b722aec MM |
1226 | /* The branch trace frame cache. */ |
1227 | ||
1228 | struct btrace_frame_cache | |
1229 | { | |
1230 | /* The thread. */ | |
1231 | struct thread_info *tp; | |
1232 | ||
1233 | /* The frame info. */ | |
1234 | struct frame_info *frame; | |
1235 | ||
1236 | /* The branch trace function segment. */ | |
1237 | const struct btrace_function *bfun; | |
1238 | }; | |
1239 | ||
1240 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1241 | ||
1242 | static htab_t bfcache; | |
1243 | ||
1244 | /* hash_f for htab_create_alloc of bfcache. */ | |
1245 | ||
1246 | static hashval_t | |
1247 | bfcache_hash (const void *arg) | |
1248 | { | |
1249 | const struct btrace_frame_cache *cache = arg; | |
1250 | ||
1251 | return htab_hash_pointer (cache->frame); | |
1252 | } | |
1253 | ||
1254 | /* eq_f for htab_create_alloc of bfcache. */ | |
1255 | ||
1256 | static int | |
1257 | bfcache_eq (const void *arg1, const void *arg2) | |
1258 | { | |
1259 | const struct btrace_frame_cache *cache1 = arg1; | |
1260 | const struct btrace_frame_cache *cache2 = arg2; | |
1261 | ||
1262 | return cache1->frame == cache2->frame; | |
1263 | } | |
1264 | ||
1265 | /* Create a new btrace frame cache. */ | |
1266 | ||
1267 | static struct btrace_frame_cache * | |
1268 | bfcache_new (struct frame_info *frame) | |
1269 | { | |
1270 | struct btrace_frame_cache *cache; | |
1271 | void **slot; | |
1272 | ||
1273 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1274 | cache->frame = frame; | |
1275 | ||
1276 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1277 | gdb_assert (*slot == NULL); | |
1278 | *slot = cache; | |
1279 | ||
1280 | return cache; | |
1281 | } | |
1282 | ||
1283 | /* Extract the branch trace function from a branch trace frame. */ | |
1284 | ||
1285 | static const struct btrace_function * | |
1286 | btrace_get_frame_function (struct frame_info *frame) | |
1287 | { | |
1288 | const struct btrace_frame_cache *cache; | |
1289 | const struct btrace_function *bfun; | |
1290 | struct btrace_frame_cache pattern; | |
1291 | void **slot; | |
1292 | ||
1293 | pattern.frame = frame; | |
1294 | ||
1295 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1296 | if (slot == NULL) | |
1297 | return NULL; | |
1298 | ||
1299 | cache = *slot; | |
1300 | return cache->bfun; | |
1301 | } | |
1302 | ||
cecac1ab MM |
1303 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1304 | ||
1305 | static enum unwind_stop_reason | |
1306 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1307 | void **this_cache) | |
1308 | { | |
0b722aec MM |
1309 | const struct btrace_frame_cache *cache; |
1310 | const struct btrace_function *bfun; | |
1311 | ||
1312 | cache = *this_cache; | |
1313 | bfun = cache->bfun; | |
1314 | gdb_assert (bfun != NULL); | |
1315 | ||
1316 | if (bfun->up == NULL) | |
1317 | return UNWIND_UNAVAILABLE; | |
1318 | ||
1319 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1320 | } |
1321 | ||
1322 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1323 | ||
1324 | static void | |
1325 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1326 | struct frame_id *this_id) | |
1327 | { | |
0b722aec MM |
1328 | const struct btrace_frame_cache *cache; |
1329 | const struct btrace_function *bfun; | |
1330 | CORE_ADDR code, special; | |
1331 | ||
1332 | cache = *this_cache; | |
1333 | ||
1334 | bfun = cache->bfun; | |
1335 | gdb_assert (bfun != NULL); | |
1336 | ||
1337 | while (bfun->segment.prev != NULL) | |
1338 | bfun = bfun->segment.prev; | |
1339 | ||
1340 | code = get_frame_func (this_frame); | |
1341 | special = bfun->number; | |
1342 | ||
1343 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1344 | ||
1345 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1346 | btrace_get_bfun_name (cache->bfun), | |
1347 | core_addr_to_string_nz (this_id->code_addr), | |
1348 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1349 | } |
1350 | ||
1351 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1352 | ||
1353 | static struct value * | |
1354 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1355 | void **this_cache, | |
1356 | int regnum) | |
1357 | { | |
0b722aec MM |
1358 | const struct btrace_frame_cache *cache; |
1359 | const struct btrace_function *bfun, *caller; | |
1360 | const struct btrace_insn *insn; | |
1361 | struct gdbarch *gdbarch; | |
1362 | CORE_ADDR pc; | |
1363 | int pcreg; | |
1364 | ||
1365 | gdbarch = get_frame_arch (this_frame); | |
1366 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1367 | if (pcreg < 0 || regnum != pcreg) | |
1368 | throw_error (NOT_AVAILABLE_ERROR, | |
1369 | _("Registers are not available in btrace record history")); | |
1370 | ||
1371 | cache = *this_cache; | |
1372 | bfun = cache->bfun; | |
1373 | gdb_assert (bfun != NULL); | |
1374 | ||
1375 | caller = bfun->up; | |
1376 | if (caller == NULL) | |
1377 | throw_error (NOT_AVAILABLE_ERROR, | |
1378 | _("No caller in btrace record history")); | |
1379 | ||
1380 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1381 | { | |
1382 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1383 | pc = insn->pc; | |
1384 | } | |
1385 | else | |
1386 | { | |
1387 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1388 | pc = insn->pc; | |
1389 | ||
1390 | pc += gdb_insn_length (gdbarch, pc); | |
1391 | } | |
1392 | ||
1393 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1394 | btrace_get_bfun_name (bfun), bfun->level, | |
1395 | core_addr_to_string_nz (pc)); | |
1396 | ||
1397 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1398 | } |
1399 | ||
1400 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1401 | ||
1402 | static int | |
1403 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1404 | struct frame_info *this_frame, | |
1405 | void **this_cache) | |
1406 | { | |
0b722aec MM |
1407 | const struct btrace_function *bfun; |
1408 | struct btrace_frame_cache *cache; | |
cecac1ab | 1409 | struct thread_info *tp; |
0b722aec | 1410 | struct frame_info *next; |
cecac1ab MM |
1411 | |
1412 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1413 | tp = find_thread_ptid (inferior_ptid); | |
1414 | gdb_assert (tp != NULL); | |
1415 | ||
0b722aec MM |
1416 | bfun = NULL; |
1417 | next = get_next_frame (this_frame); | |
1418 | if (next == NULL) | |
1419 | { | |
1420 | const struct btrace_insn_iterator *replay; | |
1421 | ||
1422 | replay = tp->btrace.replay; | |
1423 | if (replay != NULL) | |
1424 | bfun = replay->function; | |
1425 | } | |
1426 | else | |
1427 | { | |
1428 | const struct btrace_function *callee; | |
1429 | ||
1430 | callee = btrace_get_frame_function (next); | |
1431 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1432 | bfun = callee->up; | |
1433 | } | |
1434 | ||
1435 | if (bfun == NULL) | |
1436 | return 0; | |
1437 | ||
1438 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1439 | btrace_get_bfun_name (bfun), bfun->level); | |
1440 | ||
1441 | /* This is our frame. Initialize the frame cache. */ | |
1442 | cache = bfcache_new (this_frame); | |
1443 | cache->tp = tp; | |
1444 | cache->bfun = bfun; | |
1445 | ||
1446 | *this_cache = cache; | |
1447 | return 1; | |
1448 | } | |
1449 | ||
1450 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1451 | ||
1452 | static int | |
1453 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1454 | struct frame_info *this_frame, | |
1455 | void **this_cache) | |
1456 | { | |
1457 | const struct btrace_function *bfun, *callee; | |
1458 | struct btrace_frame_cache *cache; | |
1459 | struct frame_info *next; | |
1460 | ||
1461 | next = get_next_frame (this_frame); | |
1462 | if (next == NULL) | |
1463 | return 0; | |
1464 | ||
1465 | callee = btrace_get_frame_function (next); | |
1466 | if (callee == NULL) | |
1467 | return 0; | |
1468 | ||
1469 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1470 | return 0; | |
1471 | ||
1472 | bfun = callee->up; | |
1473 | if (bfun == NULL) | |
1474 | return 0; | |
1475 | ||
1476 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1477 | btrace_get_bfun_name (bfun), bfun->level); | |
1478 | ||
1479 | /* This is our frame. Initialize the frame cache. */ | |
1480 | cache = bfcache_new (this_frame); | |
1481 | cache->tp = find_thread_ptid (inferior_ptid); | |
1482 | cache->bfun = bfun; | |
1483 | ||
1484 | *this_cache = cache; | |
1485 | return 1; | |
1486 | } | |
1487 | ||
1488 | static void | |
1489 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1490 | { | |
1491 | struct btrace_frame_cache *cache; | |
1492 | void **slot; | |
1493 | ||
1494 | cache = this_cache; | |
1495 | ||
1496 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1497 | gdb_assert (slot != NULL); | |
1498 | ||
1499 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1500 | } |
1501 | ||
1502 | /* btrace recording does not store previous memory content, neither the stack | |
1503 | frames content. Any unwinding would return errorneous results as the stack | |
1504 | contents no longer matches the changed PC value restored from history. | |
1505 | Therefore this unwinder reports any possibly unwound registers as | |
1506 | <unavailable>. */ | |
1507 | ||
0b722aec | 1508 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1509 | { |
1510 | NORMAL_FRAME, | |
1511 | record_btrace_frame_unwind_stop_reason, | |
1512 | record_btrace_frame_this_id, | |
1513 | record_btrace_frame_prev_register, | |
1514 | NULL, | |
0b722aec MM |
1515 | record_btrace_frame_sniffer, |
1516 | record_btrace_frame_dealloc_cache | |
1517 | }; | |
1518 | ||
1519 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1520 | { | |
1521 | TAILCALL_FRAME, | |
1522 | record_btrace_frame_unwind_stop_reason, | |
1523 | record_btrace_frame_this_id, | |
1524 | record_btrace_frame_prev_register, | |
1525 | NULL, | |
1526 | record_btrace_tailcall_frame_sniffer, | |
1527 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1528 | }; |
b2f4cfde | 1529 | |
ac01945b TT |
1530 | /* Implement the to_get_unwinder method. */ |
1531 | ||
1532 | static const struct frame_unwind * | |
1533 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1534 | { | |
1535 | return &record_btrace_frame_unwind; | |
1536 | } | |
1537 | ||
1538 | /* Implement the to_get_tailcall_unwinder method. */ | |
1539 | ||
1540 | static const struct frame_unwind * | |
1541 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1542 | { | |
1543 | return &record_btrace_tailcall_frame_unwind; | |
1544 | } | |
1545 | ||
52834460 MM |
1546 | /* Indicate that TP should be resumed according to FLAG. */ |
1547 | ||
1548 | static void | |
1549 | record_btrace_resume_thread (struct thread_info *tp, | |
1550 | enum btrace_thread_flag flag) | |
1551 | { | |
1552 | struct btrace_thread_info *btinfo; | |
1553 | ||
1554 | DEBUG ("resuming %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flag); | |
1555 | ||
1556 | btinfo = &tp->btrace; | |
1557 | ||
1558 | if ((btinfo->flags & BTHR_MOVE) != 0) | |
1559 | error (_("Thread already moving.")); | |
1560 | ||
1561 | /* Fetch the latest branch trace. */ | |
1562 | btrace_fetch (tp); | |
1563 | ||
1564 | btinfo->flags |= flag; | |
1565 | } | |
1566 | ||
1567 | /* Find the thread to resume given a PTID. */ | |
1568 | ||
1569 | static struct thread_info * | |
1570 | record_btrace_find_resume_thread (ptid_t ptid) | |
1571 | { | |
1572 | struct thread_info *tp; | |
1573 | ||
1574 | /* When asked to resume everything, we pick the current thread. */ | |
1575 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1576 | ptid = inferior_ptid; | |
1577 | ||
1578 | return find_thread_ptid (ptid); | |
1579 | } | |
1580 | ||
1581 | /* Start replaying a thread. */ | |
1582 | ||
1583 | static struct btrace_insn_iterator * | |
1584 | record_btrace_start_replaying (struct thread_info *tp) | |
1585 | { | |
1586 | volatile struct gdb_exception except; | |
1587 | struct btrace_insn_iterator *replay; | |
1588 | struct btrace_thread_info *btinfo; | |
1589 | int executing; | |
1590 | ||
1591 | btinfo = &tp->btrace; | |
1592 | replay = NULL; | |
1593 | ||
1594 | /* We can't start replaying without trace. */ | |
1595 | if (btinfo->begin == NULL) | |
1596 | return NULL; | |
1597 | ||
1598 | /* Clear the executing flag to allow changes to the current frame. | |
1599 | We are not actually running, yet. We just started a reverse execution | |
1600 | command or a record goto command. | |
1601 | For the latter, EXECUTING is false and this has no effect. | |
1602 | For the former, EXECUTING is true and we're in to_wait, about to | |
1603 | move the thread. Since we need to recompute the stack, we temporarily | |
1604 | set EXECUTING to flase. */ | |
1605 | executing = is_executing (tp->ptid); | |
1606 | set_executing (tp->ptid, 0); | |
1607 | ||
1608 | /* GDB stores the current frame_id when stepping in order to detects steps | |
1609 | into subroutines. | |
1610 | Since frames are computed differently when we're replaying, we need to | |
1611 | recompute those stored frames and fix them up so we can still detect | |
1612 | subroutines after we started replaying. */ | |
1613 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1614 | { | |
1615 | struct frame_info *frame; | |
1616 | struct frame_id frame_id; | |
1617 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1618 | ||
1619 | /* The current frame without replaying - computed via normal unwind. */ | |
1620 | frame = get_current_frame (); | |
1621 | frame_id = get_frame_id (frame); | |
1622 | ||
1623 | /* Check if we need to update any stepping-related frame id's. */ | |
1624 | upd_step_frame_id = frame_id_eq (frame_id, | |
1625 | tp->control.step_frame_id); | |
1626 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1627 | tp->control.step_stack_frame_id); | |
1628 | ||
1629 | /* We start replaying at the end of the branch trace. This corresponds | |
1630 | to the current instruction. */ | |
1631 | replay = xmalloc (sizeof (*replay)); | |
1632 | btrace_insn_end (replay, btinfo); | |
1633 | ||
31fd9caa MM |
1634 | /* Skip gaps at the end of the trace. */ |
1635 | while (btrace_insn_get (replay) == NULL) | |
1636 | { | |
1637 | unsigned int steps; | |
1638 | ||
1639 | steps = btrace_insn_prev (replay, 1); | |
1640 | if (steps == 0) | |
1641 | error (_("No trace.")); | |
1642 | } | |
1643 | ||
52834460 MM |
1644 | /* We're not replaying, yet. */ |
1645 | gdb_assert (btinfo->replay == NULL); | |
1646 | btinfo->replay = replay; | |
1647 | ||
1648 | /* Make sure we're not using any stale registers. */ | |
1649 | registers_changed_ptid (tp->ptid); | |
1650 | ||
1651 | /* The current frame with replaying - computed via btrace unwind. */ | |
1652 | frame = get_current_frame (); | |
1653 | frame_id = get_frame_id (frame); | |
1654 | ||
1655 | /* Replace stepping related frames where necessary. */ | |
1656 | if (upd_step_frame_id) | |
1657 | tp->control.step_frame_id = frame_id; | |
1658 | if (upd_step_stack_frame_id) | |
1659 | tp->control.step_stack_frame_id = frame_id; | |
1660 | } | |
1661 | ||
1662 | /* Restore the previous execution state. */ | |
1663 | set_executing (tp->ptid, executing); | |
1664 | ||
1665 | if (except.reason < 0) | |
1666 | { | |
1667 | xfree (btinfo->replay); | |
1668 | btinfo->replay = NULL; | |
1669 | ||
1670 | registers_changed_ptid (tp->ptid); | |
1671 | ||
1672 | throw_exception (except); | |
1673 | } | |
1674 | ||
1675 | return replay; | |
1676 | } | |
1677 | ||
1678 | /* Stop replaying a thread. */ | |
1679 | ||
1680 | static void | |
1681 | record_btrace_stop_replaying (struct thread_info *tp) | |
1682 | { | |
1683 | struct btrace_thread_info *btinfo; | |
1684 | ||
1685 | btinfo = &tp->btrace; | |
1686 | ||
1687 | xfree (btinfo->replay); | |
1688 | btinfo->replay = NULL; | |
1689 | ||
1690 | /* Make sure we're not leaving any stale registers. */ | |
1691 | registers_changed_ptid (tp->ptid); | |
1692 | } | |
1693 | ||
b2f4cfde MM |
1694 | /* The to_resume method of target record-btrace. */ |
1695 | ||
1696 | static void | |
1697 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1698 | enum gdb_signal signal) | |
1699 | { | |
52834460 MM |
1700 | struct thread_info *tp, *other; |
1701 | enum btrace_thread_flag flag; | |
1702 | ||
1703 | DEBUG ("resume %s: %s", target_pid_to_str (ptid), step ? "step" : "cont"); | |
1704 | ||
70ad5bff MM |
1705 | /* Store the execution direction of the last resume. */ |
1706 | record_btrace_resume_exec_dir = execution_direction; | |
1707 | ||
52834460 MM |
1708 | tp = record_btrace_find_resume_thread (ptid); |
1709 | if (tp == NULL) | |
1710 | error (_("Cannot find thread to resume.")); | |
1711 | ||
1712 | /* Stop replaying other threads if the thread to resume is not replaying. */ | |
1713 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
034f788c | 1714 | ALL_NON_EXITED_THREADS (other) |
52834460 MM |
1715 | record_btrace_stop_replaying (other); |
1716 | ||
b2f4cfde | 1717 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 1718 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 1719 | { |
e75fdfca TT |
1720 | ops = ops->beneath; |
1721 | return ops->to_resume (ops, ptid, step, signal); | |
b2f4cfde MM |
1722 | } |
1723 | ||
52834460 MM |
1724 | /* Compute the btrace thread flag for the requested move. */ |
1725 | if (step == 0) | |
1726 | flag = execution_direction == EXEC_REVERSE ? BTHR_RCONT : BTHR_CONT; | |
1727 | else | |
1728 | flag = execution_direction == EXEC_REVERSE ? BTHR_RSTEP : BTHR_STEP; | |
1729 | ||
1730 | /* At the moment, we only move a single thread. We could also move | |
1731 | all threads in parallel by single-stepping each resumed thread | |
1732 | until the first runs into an event. | |
1733 | When we do that, we would want to continue all other threads. | |
1734 | For now, just resume one thread to not confuse to_wait. */ | |
1735 | record_btrace_resume_thread (tp, flag); | |
1736 | ||
1737 | /* We just indicate the resume intent here. The actual stepping happens in | |
1738 | record_btrace_wait below. */ | |
70ad5bff MM |
1739 | |
1740 | /* Async support. */ | |
1741 | if (target_can_async_p ()) | |
1742 | { | |
1743 | target_async (inferior_event_handler, 0); | |
1744 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
1745 | } | |
52834460 MM |
1746 | } |
1747 | ||
1748 | /* Find a thread to move. */ | |
1749 | ||
1750 | static struct thread_info * | |
1751 | record_btrace_find_thread_to_move (ptid_t ptid) | |
1752 | { | |
1753 | struct thread_info *tp; | |
1754 | ||
1755 | /* First check the parameter thread. */ | |
1756 | tp = find_thread_ptid (ptid); | |
1757 | if (tp != NULL && (tp->btrace.flags & BTHR_MOVE) != 0) | |
1758 | return tp; | |
1759 | ||
1760 | /* Otherwise, find one other thread that has been resumed. */ | |
034f788c | 1761 | ALL_NON_EXITED_THREADS (tp) |
52834460 MM |
1762 | if ((tp->btrace.flags & BTHR_MOVE) != 0) |
1763 | return tp; | |
1764 | ||
1765 | return NULL; | |
1766 | } | |
1767 | ||
1768 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1769 | ||
1770 | static struct target_waitstatus | |
1771 | btrace_step_no_history (void) | |
1772 | { | |
1773 | struct target_waitstatus status; | |
1774 | ||
1775 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1776 | ||
1777 | return status; | |
1778 | } | |
1779 | ||
1780 | /* Return a target_waitstatus indicating that a step finished. */ | |
1781 | ||
1782 | static struct target_waitstatus | |
1783 | btrace_step_stopped (void) | |
1784 | { | |
1785 | struct target_waitstatus status; | |
1786 | ||
1787 | status.kind = TARGET_WAITKIND_STOPPED; | |
1788 | status.value.sig = GDB_SIGNAL_TRAP; | |
1789 | ||
1790 | return status; | |
1791 | } | |
1792 | ||
1793 | /* Clear the record histories. */ | |
1794 | ||
1795 | static void | |
1796 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
1797 | { | |
1798 | xfree (btinfo->insn_history); | |
1799 | xfree (btinfo->call_history); | |
1800 | ||
1801 | btinfo->insn_history = NULL; | |
1802 | btinfo->call_history = NULL; | |
1803 | } | |
1804 | ||
1805 | /* Step a single thread. */ | |
1806 | ||
1807 | static struct target_waitstatus | |
1808 | record_btrace_step_thread (struct thread_info *tp) | |
1809 | { | |
1810 | struct btrace_insn_iterator *replay, end; | |
1811 | struct btrace_thread_info *btinfo; | |
1812 | struct address_space *aspace; | |
1813 | struct inferior *inf; | |
1814 | enum btrace_thread_flag flags; | |
1815 | unsigned int steps; | |
1816 | ||
e59fa00f MM |
1817 | /* We can't step without an execution history. */ |
1818 | if (btrace_is_empty (tp)) | |
1819 | return btrace_step_no_history (); | |
1820 | ||
52834460 MM |
1821 | btinfo = &tp->btrace; |
1822 | replay = btinfo->replay; | |
1823 | ||
1824 | flags = btinfo->flags & BTHR_MOVE; | |
1825 | btinfo->flags &= ~BTHR_MOVE; | |
1826 | ||
1827 | DEBUG ("stepping %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flags); | |
1828 | ||
1829 | switch (flags) | |
1830 | { | |
1831 | default: | |
1832 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
1833 | ||
1834 | case BTHR_STEP: | |
1835 | /* We're done if we're not replaying. */ | |
1836 | if (replay == NULL) | |
1837 | return btrace_step_no_history (); | |
1838 | ||
31fd9caa MM |
1839 | /* Skip gaps during replay. */ |
1840 | do | |
1841 | { | |
1842 | steps = btrace_insn_next (replay, 1); | |
1843 | if (steps == 0) | |
1844 | { | |
1845 | record_btrace_stop_replaying (tp); | |
1846 | return btrace_step_no_history (); | |
1847 | } | |
1848 | } | |
1849 | while (btrace_insn_get (replay) == NULL); | |
52834460 MM |
1850 | |
1851 | /* Determine the end of the instruction trace. */ | |
1852 | btrace_insn_end (&end, btinfo); | |
1853 | ||
1854 | /* We stop replaying if we reached the end of the trace. */ | |
1855 | if (btrace_insn_cmp (replay, &end) == 0) | |
1856 | record_btrace_stop_replaying (tp); | |
1857 | ||
1858 | return btrace_step_stopped (); | |
1859 | ||
1860 | case BTHR_RSTEP: | |
1861 | /* Start replaying if we're not already doing so. */ | |
1862 | if (replay == NULL) | |
1863 | replay = record_btrace_start_replaying (tp); | |
1864 | ||
31fd9caa MM |
1865 | /* If we can't step any further, we reached the end of the history. |
1866 | Skip gaps during replay. */ | |
1867 | do | |
1868 | { | |
1869 | steps = btrace_insn_prev (replay, 1); | |
1870 | if (steps == 0) | |
1871 | return btrace_step_no_history (); | |
1872 | ||
1873 | } | |
1874 | while (btrace_insn_get (replay) == NULL); | |
52834460 MM |
1875 | |
1876 | return btrace_step_stopped (); | |
1877 | ||
1878 | case BTHR_CONT: | |
1879 | /* We're done if we're not replaying. */ | |
1880 | if (replay == NULL) | |
1881 | return btrace_step_no_history (); | |
1882 | ||
c9657e70 | 1883 | inf = find_inferior_ptid (tp->ptid); |
52834460 MM |
1884 | aspace = inf->aspace; |
1885 | ||
1886 | /* Determine the end of the instruction trace. */ | |
1887 | btrace_insn_end (&end, btinfo); | |
1888 | ||
1889 | for (;;) | |
1890 | { | |
1891 | const struct btrace_insn *insn; | |
1892 | ||
31fd9caa MM |
1893 | /* Skip gaps during replay. */ |
1894 | do | |
1895 | { | |
1896 | steps = btrace_insn_next (replay, 1); | |
1897 | if (steps == 0) | |
1898 | { | |
1899 | record_btrace_stop_replaying (tp); | |
1900 | return btrace_step_no_history (); | |
1901 | } | |
1902 | ||
1903 | insn = btrace_insn_get (replay); | |
1904 | } | |
1905 | while (insn == NULL); | |
52834460 MM |
1906 | |
1907 | /* We stop replaying if we reached the end of the trace. */ | |
1908 | if (btrace_insn_cmp (replay, &end) == 0) | |
1909 | { | |
1910 | record_btrace_stop_replaying (tp); | |
1911 | return btrace_step_no_history (); | |
1912 | } | |
1913 | ||
52834460 MM |
1914 | DEBUG ("stepping %d (%s) ... %s", tp->num, |
1915 | target_pid_to_str (tp->ptid), | |
1916 | core_addr_to_string_nz (insn->pc)); | |
1917 | ||
1918 | if (breakpoint_here_p (aspace, insn->pc)) | |
1919 | return btrace_step_stopped (); | |
1920 | } | |
1921 | ||
1922 | case BTHR_RCONT: | |
1923 | /* Start replaying if we're not already doing so. */ | |
1924 | if (replay == NULL) | |
1925 | replay = record_btrace_start_replaying (tp); | |
1926 | ||
c9657e70 | 1927 | inf = find_inferior_ptid (tp->ptid); |
52834460 MM |
1928 | aspace = inf->aspace; |
1929 | ||
1930 | for (;;) | |
1931 | { | |
1932 | const struct btrace_insn *insn; | |
1933 | ||
31fd9caa MM |
1934 | /* If we can't step any further, we reached the end of the history. |
1935 | Skip gaps during replay. */ | |
1936 | do | |
1937 | { | |
1938 | steps = btrace_insn_prev (replay, 1); | |
1939 | if (steps == 0) | |
1940 | return btrace_step_no_history (); | |
52834460 | 1941 | |
31fd9caa MM |
1942 | insn = btrace_insn_get (replay); |
1943 | } | |
1944 | while (insn == NULL); | |
52834460 MM |
1945 | |
1946 | DEBUG ("reverse-stepping %d (%s) ... %s", tp->num, | |
1947 | target_pid_to_str (tp->ptid), | |
1948 | core_addr_to_string_nz (insn->pc)); | |
1949 | ||
1950 | if (breakpoint_here_p (aspace, insn->pc)) | |
1951 | return btrace_step_stopped (); | |
1952 | } | |
1953 | } | |
b2f4cfde MM |
1954 | } |
1955 | ||
1956 | /* The to_wait method of target record-btrace. */ | |
1957 | ||
1958 | static ptid_t | |
1959 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
1960 | struct target_waitstatus *status, int options) | |
1961 | { | |
52834460 MM |
1962 | struct thread_info *tp, *other; |
1963 | ||
1964 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
1965 | ||
b2f4cfde | 1966 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 1967 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 1968 | { |
e75fdfca TT |
1969 | ops = ops->beneath; |
1970 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
1971 | } |
1972 | ||
52834460 MM |
1973 | /* Let's find a thread to move. */ |
1974 | tp = record_btrace_find_thread_to_move (ptid); | |
1975 | if (tp == NULL) | |
1976 | { | |
1977 | DEBUG ("wait %s: no thread", target_pid_to_str (ptid)); | |
1978 | ||
1979 | status->kind = TARGET_WAITKIND_IGNORE; | |
1980 | return minus_one_ptid; | |
1981 | } | |
1982 | ||
1983 | /* We only move a single thread. We're not able to correlate threads. */ | |
1984 | *status = record_btrace_step_thread (tp); | |
1985 | ||
1986 | /* Stop all other threads. */ | |
1987 | if (!non_stop) | |
034f788c | 1988 | ALL_NON_EXITED_THREADS (other) |
52834460 MM |
1989 | other->btrace.flags &= ~BTHR_MOVE; |
1990 | ||
1991 | /* Start record histories anew from the current position. */ | |
1992 | record_btrace_clear_histories (&tp->btrace); | |
1993 | ||
1994 | /* We moved the replay position but did not update registers. */ | |
1995 | registers_changed_ptid (tp->ptid); | |
1996 | ||
1997 | return tp->ptid; | |
1998 | } | |
1999 | ||
2000 | /* The to_can_execute_reverse method of target record-btrace. */ | |
2001 | ||
2002 | static int | |
19db3e69 | 2003 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2004 | { |
2005 | return 1; | |
2006 | } | |
2007 | ||
2008 | /* The to_decr_pc_after_break method of target record-btrace. */ | |
2009 | ||
2010 | static CORE_ADDR | |
2011 | record_btrace_decr_pc_after_break (struct target_ops *ops, | |
2012 | struct gdbarch *gdbarch) | |
2013 | { | |
2014 | /* When replaying, we do not actually execute the breakpoint instruction | |
2015 | so there is no need to adjust the PC after hitting a breakpoint. */ | |
1c63c994 | 2016 | if (record_btrace_is_replaying (ops)) |
52834460 MM |
2017 | return 0; |
2018 | ||
c0eca49f | 2019 | return ops->beneath->to_decr_pc_after_break (ops->beneath, gdbarch); |
b2f4cfde MM |
2020 | } |
2021 | ||
e8032dde | 2022 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2023 | |
2024 | static void | |
e8032dde | 2025 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2026 | { |
e8032dde | 2027 | /* We don't add or remove threads during replay. */ |
1c63c994 | 2028 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2029 | return; |
2030 | ||
2031 | /* Forward the request. */ | |
e75fdfca | 2032 | ops = ops->beneath; |
e8032dde | 2033 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2034 | } |
2035 | ||
2036 | /* The to_thread_alive method of target record-btrace. */ | |
2037 | ||
2038 | static int | |
2039 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2040 | { | |
2041 | /* We don't add or remove threads during replay. */ | |
1c63c994 | 2042 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2043 | return find_thread_ptid (ptid) != NULL; |
2044 | ||
2045 | /* Forward the request. */ | |
e75fdfca TT |
2046 | ops = ops->beneath; |
2047 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2048 | } |
2049 | ||
066ce621 MM |
2050 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2051 | is stopped. */ | |
2052 | ||
2053 | static void | |
2054 | record_btrace_set_replay (struct thread_info *tp, | |
2055 | const struct btrace_insn_iterator *it) | |
2056 | { | |
2057 | struct btrace_thread_info *btinfo; | |
2058 | ||
2059 | btinfo = &tp->btrace; | |
2060 | ||
2061 | if (it == NULL || it->function == NULL) | |
52834460 | 2062 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2063 | else |
2064 | { | |
2065 | if (btinfo->replay == NULL) | |
52834460 | 2066 | record_btrace_start_replaying (tp); |
066ce621 MM |
2067 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2068 | return; | |
2069 | ||
2070 | *btinfo->replay = *it; | |
52834460 | 2071 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2072 | } |
2073 | ||
52834460 MM |
2074 | /* Start anew from the new replay position. */ |
2075 | record_btrace_clear_histories (btinfo); | |
066ce621 MM |
2076 | } |
2077 | ||
2078 | /* The to_goto_record_begin method of target record-btrace. */ | |
2079 | ||
2080 | static void | |
08475817 | 2081 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2082 | { |
2083 | struct thread_info *tp; | |
2084 | struct btrace_insn_iterator begin; | |
2085 | ||
2086 | tp = require_btrace_thread (); | |
2087 | ||
2088 | btrace_insn_begin (&begin, &tp->btrace); | |
2089 | record_btrace_set_replay (tp, &begin); | |
2090 | ||
2091 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2092 | } | |
2093 | ||
2094 | /* The to_goto_record_end method of target record-btrace. */ | |
2095 | ||
2096 | static void | |
307a1b91 | 2097 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2098 | { |
2099 | struct thread_info *tp; | |
2100 | ||
2101 | tp = require_btrace_thread (); | |
2102 | ||
2103 | record_btrace_set_replay (tp, NULL); | |
2104 | ||
2105 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2106 | } | |
2107 | ||
2108 | /* The to_goto_record method of target record-btrace. */ | |
2109 | ||
2110 | static void | |
606183ac | 2111 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2112 | { |
2113 | struct thread_info *tp; | |
2114 | struct btrace_insn_iterator it; | |
2115 | unsigned int number; | |
2116 | int found; | |
2117 | ||
2118 | number = insn; | |
2119 | ||
2120 | /* Check for wrap-arounds. */ | |
2121 | if (number != insn) | |
2122 | error (_("Instruction number out of range.")); | |
2123 | ||
2124 | tp = require_btrace_thread (); | |
2125 | ||
2126 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2127 | if (found == 0) | |
2128 | error (_("No such instruction.")); | |
2129 | ||
2130 | record_btrace_set_replay (tp, &it); | |
2131 | ||
2132 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2133 | } | |
2134 | ||
70ad5bff MM |
2135 | /* The to_execution_direction target method. */ |
2136 | ||
2137 | static enum exec_direction_kind | |
2138 | record_btrace_execution_direction (struct target_ops *self) | |
2139 | { | |
2140 | return record_btrace_resume_exec_dir; | |
2141 | } | |
2142 | ||
aef92902 MM |
2143 | /* The to_prepare_to_generate_core target method. */ |
2144 | ||
2145 | static void | |
2146 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2147 | { | |
2148 | record_btrace_generating_corefile = 1; | |
2149 | } | |
2150 | ||
2151 | /* The to_done_generating_core target method. */ | |
2152 | ||
2153 | static void | |
2154 | record_btrace_done_generating_core (struct target_ops *self) | |
2155 | { | |
2156 | record_btrace_generating_corefile = 0; | |
2157 | } | |
2158 | ||
afedecd3 MM |
2159 | /* Initialize the record-btrace target ops. */ |
2160 | ||
2161 | static void | |
2162 | init_record_btrace_ops (void) | |
2163 | { | |
2164 | struct target_ops *ops; | |
2165 | ||
2166 | ops = &record_btrace_ops; | |
2167 | ops->to_shortname = "record-btrace"; | |
2168 | ops->to_longname = "Branch tracing target"; | |
2169 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2170 | ops->to_open = record_btrace_open; | |
2171 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2172 | ops->to_async = record_btrace_async; |
afedecd3 MM |
2173 | ops->to_detach = record_detach; |
2174 | ops->to_disconnect = record_disconnect; | |
2175 | ops->to_mourn_inferior = record_mourn_inferior; | |
2176 | ops->to_kill = record_kill; | |
afedecd3 MM |
2177 | ops->to_stop_recording = record_btrace_stop_recording; |
2178 | ops->to_info_record = record_btrace_info; | |
2179 | ops->to_insn_history = record_btrace_insn_history; | |
2180 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2181 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2182 | ops->to_call_history = record_btrace_call_history; | |
2183 | ops->to_call_history_from = record_btrace_call_history_from; | |
2184 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2185 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
2186 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2187 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2188 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2189 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2190 | ops->to_store_registers = record_btrace_store_registers; | |
2191 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2192 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2193 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2194 | ops->to_resume = record_btrace_resume; |
2195 | ops->to_wait = record_btrace_wait; | |
e8032dde | 2196 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2197 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2198 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2199 | ops->to_goto_record_end = record_btrace_goto_end; | |
2200 | ops->to_goto_record = record_btrace_goto; | |
52834460 MM |
2201 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
2202 | ops->to_decr_pc_after_break = record_btrace_decr_pc_after_break; | |
70ad5bff | 2203 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2204 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2205 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2206 | ops->to_stratum = record_stratum; |
2207 | ops->to_magic = OPS_MAGIC; | |
2208 | } | |
2209 | ||
f4abbc16 MM |
2210 | /* Start recording in BTS format. */ |
2211 | ||
2212 | static void | |
2213 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2214 | { | |
2215 | volatile struct gdb_exception exception; | |
2216 | ||
2217 | if (args != NULL && *args != 0) | |
2218 | error (_("Invalid argument.")); | |
2219 | ||
2220 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2221 | ||
2222 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
2223 | execute_command ("target record-btrace", from_tty); | |
2224 | ||
2225 | if (exception.error != 0) | |
2226 | { | |
2227 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2228 | throw_exception (exception); | |
2229 | } | |
2230 | } | |
2231 | ||
afedecd3 MM |
2232 | /* Alias for "target record". */ |
2233 | ||
2234 | static void | |
2235 | cmd_record_btrace_start (char *args, int from_tty) | |
2236 | { | |
f4abbc16 MM |
2237 | volatile struct gdb_exception exception; |
2238 | ||
afedecd3 MM |
2239 | if (args != NULL && *args != 0) |
2240 | error (_("Invalid argument.")); | |
2241 | ||
f4abbc16 MM |
2242 | record_btrace_conf.format = BTRACE_FORMAT_BTS; |
2243 | ||
2244 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
2245 | execute_command ("target record-btrace", from_tty); | |
2246 | ||
2247 | if (exception.error == 0) | |
2248 | return; | |
2249 | ||
2250 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2251 | throw_exception (exception); | |
afedecd3 MM |
2252 | } |
2253 | ||
67b5c0c1 MM |
2254 | /* The "set record btrace" command. */ |
2255 | ||
2256 | static void | |
2257 | cmd_set_record_btrace (char *args, int from_tty) | |
2258 | { | |
2259 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2260 | } | |
2261 | ||
2262 | /* The "show record btrace" command. */ | |
2263 | ||
2264 | static void | |
2265 | cmd_show_record_btrace (char *args, int from_tty) | |
2266 | { | |
2267 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2268 | } | |
2269 | ||
2270 | /* The "show record btrace replay-memory-access" command. */ | |
2271 | ||
2272 | static void | |
2273 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2274 | struct cmd_list_element *c, const char *value) | |
2275 | { | |
2276 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2277 | replay_memory_access); | |
2278 | } | |
2279 | ||
d33501a5 MM |
2280 | /* The "set record btrace bts" command. */ |
2281 | ||
2282 | static void | |
2283 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
2284 | { | |
2285 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
2286 | "by an apporpriate subcommand.\n")); | |
2287 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", | |
2288 | all_commands, gdb_stdout); | |
2289 | } | |
2290 | ||
2291 | /* The "show record btrace bts" command. */ | |
2292 | ||
2293 | static void | |
2294 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
2295 | { | |
2296 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
2297 | } | |
2298 | ||
afedecd3 MM |
2299 | void _initialize_record_btrace (void); |
2300 | ||
2301 | /* Initialize btrace commands. */ | |
2302 | ||
2303 | void | |
2304 | _initialize_record_btrace (void) | |
2305 | { | |
f4abbc16 MM |
2306 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
2307 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
2308 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
2309 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
2310 | ||
f4abbc16 MM |
2311 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
2312 | _("\ | |
2313 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
2314 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
2315 | This format may not be available on all processors."), | |
2316 | &record_btrace_cmdlist); | |
2317 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
2318 | ||
67b5c0c1 MM |
2319 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
2320 | _("Set record options"), &set_record_btrace_cmdlist, | |
2321 | "set record btrace ", 0, &set_record_cmdlist); | |
2322 | ||
2323 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
2324 | _("Show record options"), &show_record_btrace_cmdlist, | |
2325 | "show record btrace ", 0, &show_record_cmdlist); | |
2326 | ||
2327 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
2328 | replay_memory_access_types, &replay_memory_access, _("\ | |
2329 | Set what memory accesses are allowed during replay."), _("\ | |
2330 | Show what memory accesses are allowed during replay."), | |
2331 | _("Default is READ-ONLY.\n\n\ | |
2332 | The btrace record target does not trace data.\n\ | |
2333 | The memory therefore corresponds to the live target and not \ | |
2334 | to the current replay position.\n\n\ | |
2335 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
2336 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
2337 | replay."), | |
2338 | NULL, cmd_show_replay_memory_access, | |
2339 | &set_record_btrace_cmdlist, | |
2340 | &show_record_btrace_cmdlist); | |
2341 | ||
d33501a5 MM |
2342 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
2343 | _("Set record btrace bts options"), | |
2344 | &set_record_btrace_bts_cmdlist, | |
2345 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
2346 | ||
2347 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
2348 | _("Show record btrace bts options"), | |
2349 | &show_record_btrace_bts_cmdlist, | |
2350 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
2351 | ||
2352 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2353 | &record_btrace_conf.bts.size, | |
2354 | _("Set the record/replay bts buffer size."), | |
2355 | _("Show the record/replay bts buffer size."), _("\ | |
2356 | When starting recording request a trace buffer of this size. \ | |
2357 | The actual buffer size may differ from the requested size. \ | |
2358 | Use \"info record\" to see the actual buffer size.\n\n\ | |
2359 | Bigger buffers allow longer recording but also take more time to process \ | |
2360 | the recorded execution trace.\n\n\ | |
2361 | The trace buffer size may not be changed while recording."), NULL, NULL, | |
2362 | &set_record_btrace_bts_cmdlist, | |
2363 | &show_record_btrace_bts_cmdlist); | |
2364 | ||
afedecd3 MM |
2365 | init_record_btrace_ops (); |
2366 | add_target (&record_btrace_ops); | |
0b722aec MM |
2367 | |
2368 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
2369 | xcalloc, xfree); | |
d33501a5 MM |
2370 | |
2371 | record_btrace_conf.bts.size = 64 * 1024; | |
afedecd3 | 2372 | } |