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 | ||
ce0dfbea MM |
724 | /* Compute the lowest and highest source line for the instructions in BFUN |
725 | and return them in PBEGIN and PEND. | |
726 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
727 | result from inlining or macro expansion. */ | |
728 | ||
729 | static void | |
730 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
731 | int *pbegin, int *pend) | |
732 | { | |
733 | struct btrace_insn *insn; | |
734 | struct symtab *symtab; | |
735 | struct symbol *sym; | |
736 | unsigned int idx; | |
737 | int begin, end; | |
738 | ||
739 | begin = INT_MAX; | |
740 | end = INT_MIN; | |
741 | ||
742 | sym = bfun->sym; | |
743 | if (sym == NULL) | |
744 | goto out; | |
745 | ||
746 | symtab = symbol_symtab (sym); | |
747 | ||
748 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
749 | { | |
750 | struct symtab_and_line sal; | |
751 | ||
752 | sal = find_pc_line (insn->pc, 0); | |
753 | if (sal.symtab != symtab || sal.line == 0) | |
754 | continue; | |
755 | ||
756 | begin = min (begin, sal.line); | |
757 | end = max (end, sal.line); | |
758 | } | |
759 | ||
760 | out: | |
761 | *pbegin = begin; | |
762 | *pend = end; | |
763 | } | |
764 | ||
afedecd3 MM |
765 | /* Print the source line information for a function call history line. */ |
766 | ||
767 | static void | |
23a7fe75 MM |
768 | btrace_call_history_src_line (struct ui_out *uiout, |
769 | const struct btrace_function *bfun) | |
afedecd3 MM |
770 | { |
771 | struct symbol *sym; | |
23a7fe75 | 772 | int begin, end; |
afedecd3 MM |
773 | |
774 | sym = bfun->sym; | |
775 | if (sym == NULL) | |
776 | return; | |
777 | ||
778 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 779 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 780 | |
ce0dfbea | 781 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 782 | if (end < begin) |
afedecd3 MM |
783 | return; |
784 | ||
785 | ui_out_text (uiout, ":"); | |
23a7fe75 | 786 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 787 | |
23a7fe75 | 788 | if (end == begin) |
afedecd3 MM |
789 | return; |
790 | ||
8710b709 | 791 | ui_out_text (uiout, ","); |
23a7fe75 | 792 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
793 | } |
794 | ||
0b722aec MM |
795 | /* Get the name of a branch trace function. */ |
796 | ||
797 | static const char * | |
798 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
799 | { | |
800 | struct minimal_symbol *msym; | |
801 | struct symbol *sym; | |
802 | ||
803 | if (bfun == NULL) | |
804 | return "??"; | |
805 | ||
806 | msym = bfun->msym; | |
807 | sym = bfun->sym; | |
808 | ||
809 | if (sym != NULL) | |
810 | return SYMBOL_PRINT_NAME (sym); | |
811 | else if (msym != NULL) | |
efd66ac6 | 812 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
813 | else |
814 | return "??"; | |
815 | } | |
816 | ||
afedecd3 MM |
817 | /* Disassemble a section of the recorded function trace. */ |
818 | ||
819 | static void | |
23a7fe75 | 820 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 821 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
822 | const struct btrace_call_iterator *begin, |
823 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
824 | enum record_print_flag flags) |
825 | { | |
23a7fe75 | 826 | struct btrace_call_iterator it; |
afedecd3 | 827 | |
23a7fe75 MM |
828 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
829 | btrace_call_number (end)); | |
afedecd3 | 830 | |
23a7fe75 | 831 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 832 | { |
23a7fe75 MM |
833 | const struct btrace_function *bfun; |
834 | struct minimal_symbol *msym; | |
835 | struct symbol *sym; | |
836 | ||
837 | bfun = btrace_call_get (&it); | |
23a7fe75 | 838 | sym = bfun->sym; |
0b722aec | 839 | msym = bfun->msym; |
23a7fe75 | 840 | |
afedecd3 | 841 | /* Print the function index. */ |
23a7fe75 | 842 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
843 | ui_out_text (uiout, "\t"); |
844 | ||
31fd9caa MM |
845 | /* Indicate gaps in the trace. */ |
846 | if (bfun->errcode != 0) | |
847 | { | |
848 | const struct btrace_config *conf; | |
849 | ||
850 | conf = btrace_conf (btinfo); | |
851 | ||
852 | /* We have trace so we must have a configuration. */ | |
853 | gdb_assert (conf != NULL); | |
854 | ||
855 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
856 | ||
857 | continue; | |
858 | } | |
859 | ||
8710b709 MM |
860 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
861 | { | |
862 | int level = bfun->level + btinfo->level, i; | |
863 | ||
864 | for (i = 0; i < level; ++i) | |
865 | ui_out_text (uiout, " "); | |
866 | } | |
867 | ||
868 | if (sym != NULL) | |
869 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
870 | else if (msym != NULL) | |
efd66ac6 | 871 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
872 | else if (!ui_out_is_mi_like_p (uiout)) |
873 | ui_out_field_string (uiout, "function", "??"); | |
874 | ||
1e038f67 | 875 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 876 | { |
8710b709 | 877 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 878 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
879 | } |
880 | ||
1e038f67 | 881 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 882 | { |
8710b709 | 883 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 884 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
885 | } |
886 | ||
afedecd3 MM |
887 | ui_out_text (uiout, "\n"); |
888 | } | |
889 | } | |
890 | ||
891 | /* The to_call_history method of target record-btrace. */ | |
892 | ||
893 | static void | |
5df2fcba | 894 | record_btrace_call_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
895 | { |
896 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
897 | struct btrace_call_history *history; |
898 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
899 | struct cleanup *uiout_cleanup; |
900 | struct ui_out *uiout; | |
23a7fe75 | 901 | unsigned int context, covered; |
afedecd3 MM |
902 | |
903 | uiout = current_uiout; | |
904 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
905 | "insn history"); | |
afedecd3 | 906 | context = abs (size); |
afedecd3 MM |
907 | if (context == 0) |
908 | error (_("Bad record function-call-history-size.")); | |
909 | ||
23a7fe75 MM |
910 | btinfo = require_btrace (); |
911 | history = btinfo->call_history; | |
912 | if (history == NULL) | |
afedecd3 | 913 | { |
07bbe694 | 914 | struct btrace_insn_iterator *replay; |
afedecd3 | 915 | |
23a7fe75 | 916 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 917 | |
07bbe694 MM |
918 | /* If we're replaying, we start at the replay position. Otherwise, we |
919 | start at the tail of the trace. */ | |
920 | replay = btinfo->replay; | |
921 | if (replay != NULL) | |
922 | { | |
923 | begin.function = replay->function; | |
924 | begin.btinfo = btinfo; | |
925 | } | |
926 | else | |
927 | btrace_call_end (&begin, btinfo); | |
928 | ||
929 | /* We start from here and expand in the requested direction. Then we | |
930 | expand in the other direction, as well, to fill up any remaining | |
931 | context. */ | |
932 | end = begin; | |
933 | if (size < 0) | |
934 | { | |
935 | /* We want the current position covered, as well. */ | |
936 | covered = btrace_call_next (&end, 1); | |
937 | covered += btrace_call_prev (&begin, context - covered); | |
938 | covered += btrace_call_next (&end, context - covered); | |
939 | } | |
940 | else | |
941 | { | |
942 | covered = btrace_call_next (&end, context); | |
943 | covered += btrace_call_prev (&begin, context- covered); | |
944 | } | |
afedecd3 MM |
945 | } |
946 | else | |
947 | { | |
23a7fe75 MM |
948 | begin = history->begin; |
949 | end = history->end; | |
afedecd3 | 950 | |
23a7fe75 MM |
951 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
952 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 953 | |
23a7fe75 MM |
954 | if (size < 0) |
955 | { | |
956 | end = begin; | |
957 | covered = btrace_call_prev (&begin, context); | |
958 | } | |
959 | else | |
960 | { | |
961 | begin = end; | |
962 | covered = btrace_call_next (&end, context); | |
963 | } | |
afedecd3 MM |
964 | } |
965 | ||
23a7fe75 | 966 | if (covered > 0) |
8710b709 | 967 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
968 | else |
969 | { | |
970 | if (size < 0) | |
971 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
972 | else | |
973 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
974 | } | |
afedecd3 | 975 | |
23a7fe75 | 976 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
977 | do_cleanups (uiout_cleanup); |
978 | } | |
979 | ||
980 | /* The to_call_history_range method of target record-btrace. */ | |
981 | ||
982 | static void | |
f0d960ea TT |
983 | record_btrace_call_history_range (struct target_ops *self, |
984 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
985 | { |
986 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
987 | struct btrace_call_history *history; |
988 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
989 | struct cleanup *uiout_cleanup; |
990 | struct ui_out *uiout; | |
23a7fe75 MM |
991 | unsigned int low, high; |
992 | int found; | |
afedecd3 MM |
993 | |
994 | uiout = current_uiout; | |
995 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
996 | "func history"); | |
23a7fe75 MM |
997 | low = from; |
998 | high = to; | |
afedecd3 | 999 | |
23a7fe75 | 1000 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
1001 | |
1002 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1003 | if (low != from || high != to) |
afedecd3 MM |
1004 | error (_("Bad range.")); |
1005 | ||
0688d04e | 1006 | if (high < low) |
afedecd3 MM |
1007 | error (_("Bad range.")); |
1008 | ||
23a7fe75 | 1009 | btinfo = require_btrace (); |
afedecd3 | 1010 | |
23a7fe75 MM |
1011 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1012 | if (found == 0) | |
1013 | error (_("Range out of bounds.")); | |
afedecd3 | 1014 | |
23a7fe75 MM |
1015 | found = btrace_find_call_by_number (&end, btinfo, high); |
1016 | if (found == 0) | |
0688d04e MM |
1017 | { |
1018 | /* Silently truncate the range. */ | |
1019 | btrace_call_end (&end, btinfo); | |
1020 | } | |
1021 | else | |
1022 | { | |
1023 | /* We want both begin and end to be inclusive. */ | |
1024 | btrace_call_next (&end, 1); | |
1025 | } | |
afedecd3 | 1026 | |
8710b709 | 1027 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1028 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1029 | |
1030 | do_cleanups (uiout_cleanup); | |
1031 | } | |
1032 | ||
1033 | /* The to_call_history_from method of target record-btrace. */ | |
1034 | ||
1035 | static void | |
ec0aea04 TT |
1036 | record_btrace_call_history_from (struct target_ops *self, |
1037 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
1038 | { |
1039 | ULONGEST begin, end, context; | |
1040 | ||
1041 | context = abs (size); | |
0688d04e MM |
1042 | if (context == 0) |
1043 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1044 | |
1045 | if (size < 0) | |
1046 | { | |
1047 | end = from; | |
1048 | ||
1049 | if (from < context) | |
1050 | begin = 0; | |
1051 | else | |
0688d04e | 1052 | begin = from - context + 1; |
afedecd3 MM |
1053 | } |
1054 | else | |
1055 | { | |
1056 | begin = from; | |
0688d04e | 1057 | end = from + context - 1; |
afedecd3 MM |
1058 | |
1059 | /* Check for wrap-around. */ | |
1060 | if (end < begin) | |
1061 | end = ULONGEST_MAX; | |
1062 | } | |
1063 | ||
f0d960ea | 1064 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1065 | } |
1066 | ||
07bbe694 MM |
1067 | /* The to_record_is_replaying method of target record-btrace. */ |
1068 | ||
1069 | static int | |
1c63c994 | 1070 | record_btrace_is_replaying (struct target_ops *self) |
07bbe694 MM |
1071 | { |
1072 | struct thread_info *tp; | |
1073 | ||
034f788c | 1074 | ALL_NON_EXITED_THREADS (tp) |
07bbe694 MM |
1075 | if (btrace_is_replaying (tp)) |
1076 | return 1; | |
1077 | ||
1078 | return 0; | |
1079 | } | |
1080 | ||
633785ff MM |
1081 | /* The to_xfer_partial method of target record-btrace. */ |
1082 | ||
9b409511 | 1083 | static enum target_xfer_status |
633785ff MM |
1084 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1085 | const char *annex, gdb_byte *readbuf, | |
1086 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1087 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1088 | { |
1089 | struct target_ops *t; | |
1090 | ||
1091 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1092 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1093 | && !record_btrace_generating_corefile |
67b5c0c1 | 1094 | && record_btrace_is_replaying (ops)) |
633785ff MM |
1095 | { |
1096 | switch (object) | |
1097 | { | |
1098 | case TARGET_OBJECT_MEMORY: | |
1099 | { | |
1100 | struct target_section *section; | |
1101 | ||
1102 | /* We do not allow writing memory in general. */ | |
1103 | if (writebuf != NULL) | |
9b409511 YQ |
1104 | { |
1105 | *xfered_len = len; | |
bc113b4e | 1106 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1107 | } |
633785ff MM |
1108 | |
1109 | /* We allow reading readonly memory. */ | |
1110 | section = target_section_by_addr (ops, offset); | |
1111 | if (section != NULL) | |
1112 | { | |
1113 | /* Check if the section we found is readonly. */ | |
1114 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1115 | section->the_bfd_section) | |
1116 | & SEC_READONLY) != 0) | |
1117 | { | |
1118 | /* Truncate the request to fit into this section. */ | |
1119 | len = min (len, section->endaddr - offset); | |
1120 | break; | |
1121 | } | |
1122 | } | |
1123 | ||
9b409511 | 1124 | *xfered_len = len; |
bc113b4e | 1125 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1126 | } |
1127 | } | |
1128 | } | |
1129 | ||
1130 | /* Forward the request. */ | |
e75fdfca TT |
1131 | ops = ops->beneath; |
1132 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1133 | offset, len, xfered_len); | |
633785ff MM |
1134 | } |
1135 | ||
1136 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1137 | ||
1138 | static int | |
1139 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1140 | struct gdbarch *gdbarch, | |
1141 | struct bp_target_info *bp_tgt) | |
1142 | { | |
1143 | volatile struct gdb_exception except; | |
67b5c0c1 MM |
1144 | const char *old; |
1145 | int ret; | |
633785ff MM |
1146 | |
1147 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1148 | duration of this function. */ | |
67b5c0c1 MM |
1149 | old = replay_memory_access; |
1150 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1151 | |
1152 | ret = 0; | |
1153 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 1154 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff | 1155 | |
67b5c0c1 | 1156 | replay_memory_access = old; |
633785ff MM |
1157 | |
1158 | if (except.reason < 0) | |
1159 | throw_exception (except); | |
1160 | ||
1161 | return ret; | |
1162 | } | |
1163 | ||
1164 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1165 | ||
1166 | static int | |
1167 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1168 | struct gdbarch *gdbarch, | |
1169 | struct bp_target_info *bp_tgt) | |
1170 | { | |
1171 | volatile struct gdb_exception except; | |
67b5c0c1 MM |
1172 | const char *old; |
1173 | int ret; | |
633785ff MM |
1174 | |
1175 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1176 | duration of this function. */ | |
67b5c0c1 MM |
1177 | old = replay_memory_access; |
1178 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1179 | |
1180 | ret = 0; | |
1181 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 1182 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff | 1183 | |
67b5c0c1 | 1184 | replay_memory_access = old; |
633785ff MM |
1185 | |
1186 | if (except.reason < 0) | |
1187 | throw_exception (except); | |
1188 | ||
1189 | return ret; | |
1190 | } | |
1191 | ||
1f3ef581 MM |
1192 | /* The to_fetch_registers method of target record-btrace. */ |
1193 | ||
1194 | static void | |
1195 | record_btrace_fetch_registers (struct target_ops *ops, | |
1196 | struct regcache *regcache, int regno) | |
1197 | { | |
1198 | struct btrace_insn_iterator *replay; | |
1199 | struct thread_info *tp; | |
1200 | ||
1201 | tp = find_thread_ptid (inferior_ptid); | |
1202 | gdb_assert (tp != NULL); | |
1203 | ||
1204 | replay = tp->btrace.replay; | |
aef92902 | 1205 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1206 | { |
1207 | const struct btrace_insn *insn; | |
1208 | struct gdbarch *gdbarch; | |
1209 | int pcreg; | |
1210 | ||
1211 | gdbarch = get_regcache_arch (regcache); | |
1212 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1213 | if (pcreg < 0) | |
1214 | return; | |
1215 | ||
1216 | /* We can only provide the PC register. */ | |
1217 | if (regno >= 0 && regno != pcreg) | |
1218 | return; | |
1219 | ||
1220 | insn = btrace_insn_get (replay); | |
1221 | gdb_assert (insn != NULL); | |
1222 | ||
1223 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1224 | } | |
1225 | else | |
1226 | { | |
e75fdfca | 1227 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1228 | |
e75fdfca | 1229 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1230 | } |
1231 | } | |
1232 | ||
1233 | /* The to_store_registers method of target record-btrace. */ | |
1234 | ||
1235 | static void | |
1236 | record_btrace_store_registers (struct target_ops *ops, | |
1237 | struct regcache *regcache, int regno) | |
1238 | { | |
1239 | struct target_ops *t; | |
1240 | ||
aef92902 | 1241 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1242 | error (_("This record target does not allow writing registers.")); |
1243 | ||
1244 | gdb_assert (may_write_registers != 0); | |
1245 | ||
e75fdfca TT |
1246 | t = ops->beneath; |
1247 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1248 | } |
1249 | ||
1250 | /* The to_prepare_to_store method of target record-btrace. */ | |
1251 | ||
1252 | static void | |
1253 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1254 | struct regcache *regcache) | |
1255 | { | |
1256 | struct target_ops *t; | |
1257 | ||
aef92902 | 1258 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1259 | return; |
1260 | ||
e75fdfca TT |
1261 | t = ops->beneath; |
1262 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1263 | } |
1264 | ||
0b722aec MM |
1265 | /* The branch trace frame cache. */ |
1266 | ||
1267 | struct btrace_frame_cache | |
1268 | { | |
1269 | /* The thread. */ | |
1270 | struct thread_info *tp; | |
1271 | ||
1272 | /* The frame info. */ | |
1273 | struct frame_info *frame; | |
1274 | ||
1275 | /* The branch trace function segment. */ | |
1276 | const struct btrace_function *bfun; | |
1277 | }; | |
1278 | ||
1279 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1280 | ||
1281 | static htab_t bfcache; | |
1282 | ||
1283 | /* hash_f for htab_create_alloc of bfcache. */ | |
1284 | ||
1285 | static hashval_t | |
1286 | bfcache_hash (const void *arg) | |
1287 | { | |
1288 | const struct btrace_frame_cache *cache = arg; | |
1289 | ||
1290 | return htab_hash_pointer (cache->frame); | |
1291 | } | |
1292 | ||
1293 | /* eq_f for htab_create_alloc of bfcache. */ | |
1294 | ||
1295 | static int | |
1296 | bfcache_eq (const void *arg1, const void *arg2) | |
1297 | { | |
1298 | const struct btrace_frame_cache *cache1 = arg1; | |
1299 | const struct btrace_frame_cache *cache2 = arg2; | |
1300 | ||
1301 | return cache1->frame == cache2->frame; | |
1302 | } | |
1303 | ||
1304 | /* Create a new btrace frame cache. */ | |
1305 | ||
1306 | static struct btrace_frame_cache * | |
1307 | bfcache_new (struct frame_info *frame) | |
1308 | { | |
1309 | struct btrace_frame_cache *cache; | |
1310 | void **slot; | |
1311 | ||
1312 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1313 | cache->frame = frame; | |
1314 | ||
1315 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1316 | gdb_assert (*slot == NULL); | |
1317 | *slot = cache; | |
1318 | ||
1319 | return cache; | |
1320 | } | |
1321 | ||
1322 | /* Extract the branch trace function from a branch trace frame. */ | |
1323 | ||
1324 | static const struct btrace_function * | |
1325 | btrace_get_frame_function (struct frame_info *frame) | |
1326 | { | |
1327 | const struct btrace_frame_cache *cache; | |
1328 | const struct btrace_function *bfun; | |
1329 | struct btrace_frame_cache pattern; | |
1330 | void **slot; | |
1331 | ||
1332 | pattern.frame = frame; | |
1333 | ||
1334 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1335 | if (slot == NULL) | |
1336 | return NULL; | |
1337 | ||
1338 | cache = *slot; | |
1339 | return cache->bfun; | |
1340 | } | |
1341 | ||
cecac1ab MM |
1342 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1343 | ||
1344 | static enum unwind_stop_reason | |
1345 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1346 | void **this_cache) | |
1347 | { | |
0b722aec MM |
1348 | const struct btrace_frame_cache *cache; |
1349 | const struct btrace_function *bfun; | |
1350 | ||
1351 | cache = *this_cache; | |
1352 | bfun = cache->bfun; | |
1353 | gdb_assert (bfun != NULL); | |
1354 | ||
1355 | if (bfun->up == NULL) | |
1356 | return UNWIND_UNAVAILABLE; | |
1357 | ||
1358 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1359 | } |
1360 | ||
1361 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1362 | ||
1363 | static void | |
1364 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1365 | struct frame_id *this_id) | |
1366 | { | |
0b722aec MM |
1367 | const struct btrace_frame_cache *cache; |
1368 | const struct btrace_function *bfun; | |
1369 | CORE_ADDR code, special; | |
1370 | ||
1371 | cache = *this_cache; | |
1372 | ||
1373 | bfun = cache->bfun; | |
1374 | gdb_assert (bfun != NULL); | |
1375 | ||
1376 | while (bfun->segment.prev != NULL) | |
1377 | bfun = bfun->segment.prev; | |
1378 | ||
1379 | code = get_frame_func (this_frame); | |
1380 | special = bfun->number; | |
1381 | ||
1382 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1383 | ||
1384 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1385 | btrace_get_bfun_name (cache->bfun), | |
1386 | core_addr_to_string_nz (this_id->code_addr), | |
1387 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1388 | } |
1389 | ||
1390 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1391 | ||
1392 | static struct value * | |
1393 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1394 | void **this_cache, | |
1395 | int regnum) | |
1396 | { | |
0b722aec MM |
1397 | const struct btrace_frame_cache *cache; |
1398 | const struct btrace_function *bfun, *caller; | |
1399 | const struct btrace_insn *insn; | |
1400 | struct gdbarch *gdbarch; | |
1401 | CORE_ADDR pc; | |
1402 | int pcreg; | |
1403 | ||
1404 | gdbarch = get_frame_arch (this_frame); | |
1405 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1406 | if (pcreg < 0 || regnum != pcreg) | |
1407 | throw_error (NOT_AVAILABLE_ERROR, | |
1408 | _("Registers are not available in btrace record history")); | |
1409 | ||
1410 | cache = *this_cache; | |
1411 | bfun = cache->bfun; | |
1412 | gdb_assert (bfun != NULL); | |
1413 | ||
1414 | caller = bfun->up; | |
1415 | if (caller == NULL) | |
1416 | throw_error (NOT_AVAILABLE_ERROR, | |
1417 | _("No caller in btrace record history")); | |
1418 | ||
1419 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1420 | { | |
1421 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1422 | pc = insn->pc; | |
1423 | } | |
1424 | else | |
1425 | { | |
1426 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1427 | pc = insn->pc; | |
1428 | ||
1429 | pc += gdb_insn_length (gdbarch, pc); | |
1430 | } | |
1431 | ||
1432 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1433 | btrace_get_bfun_name (bfun), bfun->level, | |
1434 | core_addr_to_string_nz (pc)); | |
1435 | ||
1436 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1437 | } |
1438 | ||
1439 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1440 | ||
1441 | static int | |
1442 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1443 | struct frame_info *this_frame, | |
1444 | void **this_cache) | |
1445 | { | |
0b722aec MM |
1446 | const struct btrace_function *bfun; |
1447 | struct btrace_frame_cache *cache; | |
cecac1ab | 1448 | struct thread_info *tp; |
0b722aec | 1449 | struct frame_info *next; |
cecac1ab MM |
1450 | |
1451 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1452 | tp = find_thread_ptid (inferior_ptid); | |
1453 | gdb_assert (tp != NULL); | |
1454 | ||
0b722aec MM |
1455 | bfun = NULL; |
1456 | next = get_next_frame (this_frame); | |
1457 | if (next == NULL) | |
1458 | { | |
1459 | const struct btrace_insn_iterator *replay; | |
1460 | ||
1461 | replay = tp->btrace.replay; | |
1462 | if (replay != NULL) | |
1463 | bfun = replay->function; | |
1464 | } | |
1465 | else | |
1466 | { | |
1467 | const struct btrace_function *callee; | |
1468 | ||
1469 | callee = btrace_get_frame_function (next); | |
1470 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1471 | bfun = callee->up; | |
1472 | } | |
1473 | ||
1474 | if (bfun == NULL) | |
1475 | return 0; | |
1476 | ||
1477 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1478 | btrace_get_bfun_name (bfun), bfun->level); | |
1479 | ||
1480 | /* This is our frame. Initialize the frame cache. */ | |
1481 | cache = bfcache_new (this_frame); | |
1482 | cache->tp = tp; | |
1483 | cache->bfun = bfun; | |
1484 | ||
1485 | *this_cache = cache; | |
1486 | return 1; | |
1487 | } | |
1488 | ||
1489 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1490 | ||
1491 | static int | |
1492 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1493 | struct frame_info *this_frame, | |
1494 | void **this_cache) | |
1495 | { | |
1496 | const struct btrace_function *bfun, *callee; | |
1497 | struct btrace_frame_cache *cache; | |
1498 | struct frame_info *next; | |
1499 | ||
1500 | next = get_next_frame (this_frame); | |
1501 | if (next == NULL) | |
1502 | return 0; | |
1503 | ||
1504 | callee = btrace_get_frame_function (next); | |
1505 | if (callee == NULL) | |
1506 | return 0; | |
1507 | ||
1508 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1509 | return 0; | |
1510 | ||
1511 | bfun = callee->up; | |
1512 | if (bfun == NULL) | |
1513 | return 0; | |
1514 | ||
1515 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1516 | btrace_get_bfun_name (bfun), bfun->level); | |
1517 | ||
1518 | /* This is our frame. Initialize the frame cache. */ | |
1519 | cache = bfcache_new (this_frame); | |
1520 | cache->tp = find_thread_ptid (inferior_ptid); | |
1521 | cache->bfun = bfun; | |
1522 | ||
1523 | *this_cache = cache; | |
1524 | return 1; | |
1525 | } | |
1526 | ||
1527 | static void | |
1528 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1529 | { | |
1530 | struct btrace_frame_cache *cache; | |
1531 | void **slot; | |
1532 | ||
1533 | cache = this_cache; | |
1534 | ||
1535 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1536 | gdb_assert (slot != NULL); | |
1537 | ||
1538 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1539 | } |
1540 | ||
1541 | /* btrace recording does not store previous memory content, neither the stack | |
1542 | frames content. Any unwinding would return errorneous results as the stack | |
1543 | contents no longer matches the changed PC value restored from history. | |
1544 | Therefore this unwinder reports any possibly unwound registers as | |
1545 | <unavailable>. */ | |
1546 | ||
0b722aec | 1547 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1548 | { |
1549 | NORMAL_FRAME, | |
1550 | record_btrace_frame_unwind_stop_reason, | |
1551 | record_btrace_frame_this_id, | |
1552 | record_btrace_frame_prev_register, | |
1553 | NULL, | |
0b722aec MM |
1554 | record_btrace_frame_sniffer, |
1555 | record_btrace_frame_dealloc_cache | |
1556 | }; | |
1557 | ||
1558 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1559 | { | |
1560 | TAILCALL_FRAME, | |
1561 | record_btrace_frame_unwind_stop_reason, | |
1562 | record_btrace_frame_this_id, | |
1563 | record_btrace_frame_prev_register, | |
1564 | NULL, | |
1565 | record_btrace_tailcall_frame_sniffer, | |
1566 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1567 | }; |
b2f4cfde | 1568 | |
ac01945b TT |
1569 | /* Implement the to_get_unwinder method. */ |
1570 | ||
1571 | static const struct frame_unwind * | |
1572 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1573 | { | |
1574 | return &record_btrace_frame_unwind; | |
1575 | } | |
1576 | ||
1577 | /* Implement the to_get_tailcall_unwinder method. */ | |
1578 | ||
1579 | static const struct frame_unwind * | |
1580 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1581 | { | |
1582 | return &record_btrace_tailcall_frame_unwind; | |
1583 | } | |
1584 | ||
52834460 MM |
1585 | /* Indicate that TP should be resumed according to FLAG. */ |
1586 | ||
1587 | static void | |
1588 | record_btrace_resume_thread (struct thread_info *tp, | |
1589 | enum btrace_thread_flag flag) | |
1590 | { | |
1591 | struct btrace_thread_info *btinfo; | |
1592 | ||
1593 | DEBUG ("resuming %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flag); | |
1594 | ||
1595 | btinfo = &tp->btrace; | |
1596 | ||
1597 | if ((btinfo->flags & BTHR_MOVE) != 0) | |
1598 | error (_("Thread already moving.")); | |
1599 | ||
1600 | /* Fetch the latest branch trace. */ | |
1601 | btrace_fetch (tp); | |
1602 | ||
1603 | btinfo->flags |= flag; | |
1604 | } | |
1605 | ||
1606 | /* Find the thread to resume given a PTID. */ | |
1607 | ||
1608 | static struct thread_info * | |
1609 | record_btrace_find_resume_thread (ptid_t ptid) | |
1610 | { | |
1611 | struct thread_info *tp; | |
1612 | ||
1613 | /* When asked to resume everything, we pick the current thread. */ | |
1614 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1615 | ptid = inferior_ptid; | |
1616 | ||
1617 | return find_thread_ptid (ptid); | |
1618 | } | |
1619 | ||
1620 | /* Start replaying a thread. */ | |
1621 | ||
1622 | static struct btrace_insn_iterator * | |
1623 | record_btrace_start_replaying (struct thread_info *tp) | |
1624 | { | |
1625 | volatile struct gdb_exception except; | |
1626 | struct btrace_insn_iterator *replay; | |
1627 | struct btrace_thread_info *btinfo; | |
1628 | int executing; | |
1629 | ||
1630 | btinfo = &tp->btrace; | |
1631 | replay = NULL; | |
1632 | ||
1633 | /* We can't start replaying without trace. */ | |
1634 | if (btinfo->begin == NULL) | |
1635 | return NULL; | |
1636 | ||
1637 | /* Clear the executing flag to allow changes to the current frame. | |
1638 | We are not actually running, yet. We just started a reverse execution | |
1639 | command or a record goto command. | |
1640 | For the latter, EXECUTING is false and this has no effect. | |
1641 | For the former, EXECUTING is true and we're in to_wait, about to | |
1642 | move the thread. Since we need to recompute the stack, we temporarily | |
1643 | set EXECUTING to flase. */ | |
1644 | executing = is_executing (tp->ptid); | |
1645 | set_executing (tp->ptid, 0); | |
1646 | ||
1647 | /* GDB stores the current frame_id when stepping in order to detects steps | |
1648 | into subroutines. | |
1649 | Since frames are computed differently when we're replaying, we need to | |
1650 | recompute those stored frames and fix them up so we can still detect | |
1651 | subroutines after we started replaying. */ | |
1652 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1653 | { | |
1654 | struct frame_info *frame; | |
1655 | struct frame_id frame_id; | |
1656 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1657 | ||
1658 | /* The current frame without replaying - computed via normal unwind. */ | |
1659 | frame = get_current_frame (); | |
1660 | frame_id = get_frame_id (frame); | |
1661 | ||
1662 | /* Check if we need to update any stepping-related frame id's. */ | |
1663 | upd_step_frame_id = frame_id_eq (frame_id, | |
1664 | tp->control.step_frame_id); | |
1665 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1666 | tp->control.step_stack_frame_id); | |
1667 | ||
1668 | /* We start replaying at the end of the branch trace. This corresponds | |
1669 | to the current instruction. */ | |
1670 | replay = xmalloc (sizeof (*replay)); | |
1671 | btrace_insn_end (replay, btinfo); | |
1672 | ||
31fd9caa MM |
1673 | /* Skip gaps at the end of the trace. */ |
1674 | while (btrace_insn_get (replay) == NULL) | |
1675 | { | |
1676 | unsigned int steps; | |
1677 | ||
1678 | steps = btrace_insn_prev (replay, 1); | |
1679 | if (steps == 0) | |
1680 | error (_("No trace.")); | |
1681 | } | |
1682 | ||
52834460 MM |
1683 | /* We're not replaying, yet. */ |
1684 | gdb_assert (btinfo->replay == NULL); | |
1685 | btinfo->replay = replay; | |
1686 | ||
1687 | /* Make sure we're not using any stale registers. */ | |
1688 | registers_changed_ptid (tp->ptid); | |
1689 | ||
1690 | /* The current frame with replaying - computed via btrace unwind. */ | |
1691 | frame = get_current_frame (); | |
1692 | frame_id = get_frame_id (frame); | |
1693 | ||
1694 | /* Replace stepping related frames where necessary. */ | |
1695 | if (upd_step_frame_id) | |
1696 | tp->control.step_frame_id = frame_id; | |
1697 | if (upd_step_stack_frame_id) | |
1698 | tp->control.step_stack_frame_id = frame_id; | |
1699 | } | |
1700 | ||
1701 | /* Restore the previous execution state. */ | |
1702 | set_executing (tp->ptid, executing); | |
1703 | ||
1704 | if (except.reason < 0) | |
1705 | { | |
1706 | xfree (btinfo->replay); | |
1707 | btinfo->replay = NULL; | |
1708 | ||
1709 | registers_changed_ptid (tp->ptid); | |
1710 | ||
1711 | throw_exception (except); | |
1712 | } | |
1713 | ||
1714 | return replay; | |
1715 | } | |
1716 | ||
1717 | /* Stop replaying a thread. */ | |
1718 | ||
1719 | static void | |
1720 | record_btrace_stop_replaying (struct thread_info *tp) | |
1721 | { | |
1722 | struct btrace_thread_info *btinfo; | |
1723 | ||
1724 | btinfo = &tp->btrace; | |
1725 | ||
1726 | xfree (btinfo->replay); | |
1727 | btinfo->replay = NULL; | |
1728 | ||
1729 | /* Make sure we're not leaving any stale registers. */ | |
1730 | registers_changed_ptid (tp->ptid); | |
1731 | } | |
1732 | ||
b2f4cfde MM |
1733 | /* The to_resume method of target record-btrace. */ |
1734 | ||
1735 | static void | |
1736 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1737 | enum gdb_signal signal) | |
1738 | { | |
52834460 MM |
1739 | struct thread_info *tp, *other; |
1740 | enum btrace_thread_flag flag; | |
1741 | ||
1742 | DEBUG ("resume %s: %s", target_pid_to_str (ptid), step ? "step" : "cont"); | |
1743 | ||
70ad5bff MM |
1744 | /* Store the execution direction of the last resume. */ |
1745 | record_btrace_resume_exec_dir = execution_direction; | |
1746 | ||
52834460 MM |
1747 | tp = record_btrace_find_resume_thread (ptid); |
1748 | if (tp == NULL) | |
1749 | error (_("Cannot find thread to resume.")); | |
1750 | ||
1751 | /* Stop replaying other threads if the thread to resume is not replaying. */ | |
1752 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
034f788c | 1753 | ALL_NON_EXITED_THREADS (other) |
52834460 MM |
1754 | record_btrace_stop_replaying (other); |
1755 | ||
b2f4cfde | 1756 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 1757 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 1758 | { |
e75fdfca TT |
1759 | ops = ops->beneath; |
1760 | return ops->to_resume (ops, ptid, step, signal); | |
b2f4cfde MM |
1761 | } |
1762 | ||
52834460 MM |
1763 | /* Compute the btrace thread flag for the requested move. */ |
1764 | if (step == 0) | |
1765 | flag = execution_direction == EXEC_REVERSE ? BTHR_RCONT : BTHR_CONT; | |
1766 | else | |
1767 | flag = execution_direction == EXEC_REVERSE ? BTHR_RSTEP : BTHR_STEP; | |
1768 | ||
1769 | /* At the moment, we only move a single thread. We could also move | |
1770 | all threads in parallel by single-stepping each resumed thread | |
1771 | until the first runs into an event. | |
1772 | When we do that, we would want to continue all other threads. | |
1773 | For now, just resume one thread to not confuse to_wait. */ | |
1774 | record_btrace_resume_thread (tp, flag); | |
1775 | ||
1776 | /* We just indicate the resume intent here. The actual stepping happens in | |
1777 | record_btrace_wait below. */ | |
70ad5bff MM |
1778 | |
1779 | /* Async support. */ | |
1780 | if (target_can_async_p ()) | |
1781 | { | |
1782 | target_async (inferior_event_handler, 0); | |
1783 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
1784 | } | |
52834460 MM |
1785 | } |
1786 | ||
1787 | /* Find a thread to move. */ | |
1788 | ||
1789 | static struct thread_info * | |
1790 | record_btrace_find_thread_to_move (ptid_t ptid) | |
1791 | { | |
1792 | struct thread_info *tp; | |
1793 | ||
1794 | /* First check the parameter thread. */ | |
1795 | tp = find_thread_ptid (ptid); | |
1796 | if (tp != NULL && (tp->btrace.flags & BTHR_MOVE) != 0) | |
1797 | return tp; | |
1798 | ||
1799 | /* Otherwise, find one other thread that has been resumed. */ | |
034f788c | 1800 | ALL_NON_EXITED_THREADS (tp) |
52834460 MM |
1801 | if ((tp->btrace.flags & BTHR_MOVE) != 0) |
1802 | return tp; | |
1803 | ||
1804 | return NULL; | |
1805 | } | |
1806 | ||
1807 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1808 | ||
1809 | static struct target_waitstatus | |
1810 | btrace_step_no_history (void) | |
1811 | { | |
1812 | struct target_waitstatus status; | |
1813 | ||
1814 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1815 | ||
1816 | return status; | |
1817 | } | |
1818 | ||
1819 | /* Return a target_waitstatus indicating that a step finished. */ | |
1820 | ||
1821 | static struct target_waitstatus | |
1822 | btrace_step_stopped (void) | |
1823 | { | |
1824 | struct target_waitstatus status; | |
1825 | ||
1826 | status.kind = TARGET_WAITKIND_STOPPED; | |
1827 | status.value.sig = GDB_SIGNAL_TRAP; | |
1828 | ||
1829 | return status; | |
1830 | } | |
1831 | ||
1832 | /* Clear the record histories. */ | |
1833 | ||
1834 | static void | |
1835 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
1836 | { | |
1837 | xfree (btinfo->insn_history); | |
1838 | xfree (btinfo->call_history); | |
1839 | ||
1840 | btinfo->insn_history = NULL; | |
1841 | btinfo->call_history = NULL; | |
1842 | } | |
1843 | ||
1844 | /* Step a single thread. */ | |
1845 | ||
1846 | static struct target_waitstatus | |
1847 | record_btrace_step_thread (struct thread_info *tp) | |
1848 | { | |
1849 | struct btrace_insn_iterator *replay, end; | |
1850 | struct btrace_thread_info *btinfo; | |
1851 | struct address_space *aspace; | |
1852 | struct inferior *inf; | |
1853 | enum btrace_thread_flag flags; | |
1854 | unsigned int steps; | |
1855 | ||
e59fa00f MM |
1856 | /* We can't step without an execution history. */ |
1857 | if (btrace_is_empty (tp)) | |
1858 | return btrace_step_no_history (); | |
1859 | ||
52834460 MM |
1860 | btinfo = &tp->btrace; |
1861 | replay = btinfo->replay; | |
1862 | ||
1863 | flags = btinfo->flags & BTHR_MOVE; | |
1864 | btinfo->flags &= ~BTHR_MOVE; | |
1865 | ||
1866 | DEBUG ("stepping %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flags); | |
1867 | ||
1868 | switch (flags) | |
1869 | { | |
1870 | default: | |
1871 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
1872 | ||
1873 | case BTHR_STEP: | |
1874 | /* We're done if we're not replaying. */ | |
1875 | if (replay == NULL) | |
1876 | return btrace_step_no_history (); | |
1877 | ||
31fd9caa MM |
1878 | /* Skip gaps during replay. */ |
1879 | do | |
1880 | { | |
1881 | steps = btrace_insn_next (replay, 1); | |
1882 | if (steps == 0) | |
1883 | { | |
1884 | record_btrace_stop_replaying (tp); | |
1885 | return btrace_step_no_history (); | |
1886 | } | |
1887 | } | |
1888 | while (btrace_insn_get (replay) == NULL); | |
52834460 MM |
1889 | |
1890 | /* Determine the end of the instruction trace. */ | |
1891 | btrace_insn_end (&end, btinfo); | |
1892 | ||
1893 | /* We stop replaying if we reached the end of the trace. */ | |
1894 | if (btrace_insn_cmp (replay, &end) == 0) | |
1895 | record_btrace_stop_replaying (tp); | |
1896 | ||
1897 | return btrace_step_stopped (); | |
1898 | ||
1899 | case BTHR_RSTEP: | |
1900 | /* Start replaying if we're not already doing so. */ | |
1901 | if (replay == NULL) | |
1902 | replay = record_btrace_start_replaying (tp); | |
1903 | ||
31fd9caa MM |
1904 | /* If we can't step any further, we reached the end of the history. |
1905 | Skip gaps during replay. */ | |
1906 | do | |
1907 | { | |
1908 | steps = btrace_insn_prev (replay, 1); | |
1909 | if (steps == 0) | |
1910 | return btrace_step_no_history (); | |
1911 | ||
1912 | } | |
1913 | while (btrace_insn_get (replay) == NULL); | |
52834460 MM |
1914 | |
1915 | return btrace_step_stopped (); | |
1916 | ||
1917 | case BTHR_CONT: | |
1918 | /* We're done if we're not replaying. */ | |
1919 | if (replay == NULL) | |
1920 | return btrace_step_no_history (); | |
1921 | ||
c9657e70 | 1922 | inf = find_inferior_ptid (tp->ptid); |
52834460 MM |
1923 | aspace = inf->aspace; |
1924 | ||
1925 | /* Determine the end of the instruction trace. */ | |
1926 | btrace_insn_end (&end, btinfo); | |
1927 | ||
1928 | for (;;) | |
1929 | { | |
1930 | const struct btrace_insn *insn; | |
1931 | ||
31fd9caa MM |
1932 | /* Skip gaps during replay. */ |
1933 | do | |
1934 | { | |
1935 | steps = btrace_insn_next (replay, 1); | |
1936 | if (steps == 0) | |
1937 | { | |
1938 | record_btrace_stop_replaying (tp); | |
1939 | return btrace_step_no_history (); | |
1940 | } | |
1941 | ||
1942 | insn = btrace_insn_get (replay); | |
1943 | } | |
1944 | while (insn == NULL); | |
52834460 MM |
1945 | |
1946 | /* We stop replaying if we reached the end of the trace. */ | |
1947 | if (btrace_insn_cmp (replay, &end) == 0) | |
1948 | { | |
1949 | record_btrace_stop_replaying (tp); | |
1950 | return btrace_step_no_history (); | |
1951 | } | |
1952 | ||
52834460 MM |
1953 | DEBUG ("stepping %d (%s) ... %s", tp->num, |
1954 | target_pid_to_str (tp->ptid), | |
1955 | core_addr_to_string_nz (insn->pc)); | |
1956 | ||
1957 | if (breakpoint_here_p (aspace, insn->pc)) | |
1958 | return btrace_step_stopped (); | |
1959 | } | |
1960 | ||
1961 | case BTHR_RCONT: | |
1962 | /* Start replaying if we're not already doing so. */ | |
1963 | if (replay == NULL) | |
1964 | replay = record_btrace_start_replaying (tp); | |
1965 | ||
c9657e70 | 1966 | inf = find_inferior_ptid (tp->ptid); |
52834460 MM |
1967 | aspace = inf->aspace; |
1968 | ||
1969 | for (;;) | |
1970 | { | |
1971 | const struct btrace_insn *insn; | |
1972 | ||
31fd9caa MM |
1973 | /* If we can't step any further, we reached the end of the history. |
1974 | Skip gaps during replay. */ | |
1975 | do | |
1976 | { | |
1977 | steps = btrace_insn_prev (replay, 1); | |
1978 | if (steps == 0) | |
1979 | return btrace_step_no_history (); | |
52834460 | 1980 | |
31fd9caa MM |
1981 | insn = btrace_insn_get (replay); |
1982 | } | |
1983 | while (insn == NULL); | |
52834460 MM |
1984 | |
1985 | DEBUG ("reverse-stepping %d (%s) ... %s", tp->num, | |
1986 | target_pid_to_str (tp->ptid), | |
1987 | core_addr_to_string_nz (insn->pc)); | |
1988 | ||
1989 | if (breakpoint_here_p (aspace, insn->pc)) | |
1990 | return btrace_step_stopped (); | |
1991 | } | |
1992 | } | |
b2f4cfde MM |
1993 | } |
1994 | ||
1995 | /* The to_wait method of target record-btrace. */ | |
1996 | ||
1997 | static ptid_t | |
1998 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
1999 | struct target_waitstatus *status, int options) | |
2000 | { | |
52834460 MM |
2001 | struct thread_info *tp, *other; |
2002 | ||
2003 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2004 | ||
b2f4cfde | 2005 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 2006 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 2007 | { |
e75fdfca TT |
2008 | ops = ops->beneath; |
2009 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2010 | } |
2011 | ||
52834460 MM |
2012 | /* Let's find a thread to move. */ |
2013 | tp = record_btrace_find_thread_to_move (ptid); | |
2014 | if (tp == NULL) | |
2015 | { | |
2016 | DEBUG ("wait %s: no thread", target_pid_to_str (ptid)); | |
2017 | ||
2018 | status->kind = TARGET_WAITKIND_IGNORE; | |
2019 | return minus_one_ptid; | |
2020 | } | |
2021 | ||
2022 | /* We only move a single thread. We're not able to correlate threads. */ | |
2023 | *status = record_btrace_step_thread (tp); | |
2024 | ||
2025 | /* Stop all other threads. */ | |
2026 | if (!non_stop) | |
034f788c | 2027 | ALL_NON_EXITED_THREADS (other) |
52834460 MM |
2028 | other->btrace.flags &= ~BTHR_MOVE; |
2029 | ||
2030 | /* Start record histories anew from the current position. */ | |
2031 | record_btrace_clear_histories (&tp->btrace); | |
2032 | ||
2033 | /* We moved the replay position but did not update registers. */ | |
2034 | registers_changed_ptid (tp->ptid); | |
2035 | ||
2036 | return tp->ptid; | |
2037 | } | |
2038 | ||
2039 | /* The to_can_execute_reverse method of target record-btrace. */ | |
2040 | ||
2041 | static int | |
19db3e69 | 2042 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2043 | { |
2044 | return 1; | |
2045 | } | |
2046 | ||
2047 | /* The to_decr_pc_after_break method of target record-btrace. */ | |
2048 | ||
2049 | static CORE_ADDR | |
2050 | record_btrace_decr_pc_after_break (struct target_ops *ops, | |
2051 | struct gdbarch *gdbarch) | |
2052 | { | |
2053 | /* When replaying, we do not actually execute the breakpoint instruction | |
2054 | so there is no need to adjust the PC after hitting a breakpoint. */ | |
1c63c994 | 2055 | if (record_btrace_is_replaying (ops)) |
52834460 MM |
2056 | return 0; |
2057 | ||
c0eca49f | 2058 | return ops->beneath->to_decr_pc_after_break (ops->beneath, gdbarch); |
b2f4cfde MM |
2059 | } |
2060 | ||
e8032dde | 2061 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2062 | |
2063 | static void | |
e8032dde | 2064 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2065 | { |
e8032dde | 2066 | /* We don't add or remove threads during replay. */ |
1c63c994 | 2067 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2068 | return; |
2069 | ||
2070 | /* Forward the request. */ | |
e75fdfca | 2071 | ops = ops->beneath; |
e8032dde | 2072 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2073 | } |
2074 | ||
2075 | /* The to_thread_alive method of target record-btrace. */ | |
2076 | ||
2077 | static int | |
2078 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2079 | { | |
2080 | /* We don't add or remove threads during replay. */ | |
1c63c994 | 2081 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2082 | return find_thread_ptid (ptid) != NULL; |
2083 | ||
2084 | /* Forward the request. */ | |
e75fdfca TT |
2085 | ops = ops->beneath; |
2086 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2087 | } |
2088 | ||
066ce621 MM |
2089 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2090 | is stopped. */ | |
2091 | ||
2092 | static void | |
2093 | record_btrace_set_replay (struct thread_info *tp, | |
2094 | const struct btrace_insn_iterator *it) | |
2095 | { | |
2096 | struct btrace_thread_info *btinfo; | |
2097 | ||
2098 | btinfo = &tp->btrace; | |
2099 | ||
2100 | if (it == NULL || it->function == NULL) | |
52834460 | 2101 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2102 | else |
2103 | { | |
2104 | if (btinfo->replay == NULL) | |
52834460 | 2105 | record_btrace_start_replaying (tp); |
066ce621 MM |
2106 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2107 | return; | |
2108 | ||
2109 | *btinfo->replay = *it; | |
52834460 | 2110 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2111 | } |
2112 | ||
52834460 MM |
2113 | /* Start anew from the new replay position. */ |
2114 | record_btrace_clear_histories (btinfo); | |
066ce621 MM |
2115 | } |
2116 | ||
2117 | /* The to_goto_record_begin method of target record-btrace. */ | |
2118 | ||
2119 | static void | |
08475817 | 2120 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2121 | { |
2122 | struct thread_info *tp; | |
2123 | struct btrace_insn_iterator begin; | |
2124 | ||
2125 | tp = require_btrace_thread (); | |
2126 | ||
2127 | btrace_insn_begin (&begin, &tp->btrace); | |
2128 | record_btrace_set_replay (tp, &begin); | |
2129 | ||
2130 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2131 | } | |
2132 | ||
2133 | /* The to_goto_record_end method of target record-btrace. */ | |
2134 | ||
2135 | static void | |
307a1b91 | 2136 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2137 | { |
2138 | struct thread_info *tp; | |
2139 | ||
2140 | tp = require_btrace_thread (); | |
2141 | ||
2142 | record_btrace_set_replay (tp, NULL); | |
2143 | ||
2144 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2145 | } | |
2146 | ||
2147 | /* The to_goto_record method of target record-btrace. */ | |
2148 | ||
2149 | static void | |
606183ac | 2150 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2151 | { |
2152 | struct thread_info *tp; | |
2153 | struct btrace_insn_iterator it; | |
2154 | unsigned int number; | |
2155 | int found; | |
2156 | ||
2157 | number = insn; | |
2158 | ||
2159 | /* Check for wrap-arounds. */ | |
2160 | if (number != insn) | |
2161 | error (_("Instruction number out of range.")); | |
2162 | ||
2163 | tp = require_btrace_thread (); | |
2164 | ||
2165 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2166 | if (found == 0) | |
2167 | error (_("No such instruction.")); | |
2168 | ||
2169 | record_btrace_set_replay (tp, &it); | |
2170 | ||
2171 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2172 | } | |
2173 | ||
70ad5bff MM |
2174 | /* The to_execution_direction target method. */ |
2175 | ||
2176 | static enum exec_direction_kind | |
2177 | record_btrace_execution_direction (struct target_ops *self) | |
2178 | { | |
2179 | return record_btrace_resume_exec_dir; | |
2180 | } | |
2181 | ||
aef92902 MM |
2182 | /* The to_prepare_to_generate_core target method. */ |
2183 | ||
2184 | static void | |
2185 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2186 | { | |
2187 | record_btrace_generating_corefile = 1; | |
2188 | } | |
2189 | ||
2190 | /* The to_done_generating_core target method. */ | |
2191 | ||
2192 | static void | |
2193 | record_btrace_done_generating_core (struct target_ops *self) | |
2194 | { | |
2195 | record_btrace_generating_corefile = 0; | |
2196 | } | |
2197 | ||
afedecd3 MM |
2198 | /* Initialize the record-btrace target ops. */ |
2199 | ||
2200 | static void | |
2201 | init_record_btrace_ops (void) | |
2202 | { | |
2203 | struct target_ops *ops; | |
2204 | ||
2205 | ops = &record_btrace_ops; | |
2206 | ops->to_shortname = "record-btrace"; | |
2207 | ops->to_longname = "Branch tracing target"; | |
2208 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2209 | ops->to_open = record_btrace_open; | |
2210 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2211 | ops->to_async = record_btrace_async; |
afedecd3 MM |
2212 | ops->to_detach = record_detach; |
2213 | ops->to_disconnect = record_disconnect; | |
2214 | ops->to_mourn_inferior = record_mourn_inferior; | |
2215 | ops->to_kill = record_kill; | |
afedecd3 MM |
2216 | ops->to_stop_recording = record_btrace_stop_recording; |
2217 | ops->to_info_record = record_btrace_info; | |
2218 | ops->to_insn_history = record_btrace_insn_history; | |
2219 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2220 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2221 | ops->to_call_history = record_btrace_call_history; | |
2222 | ops->to_call_history_from = record_btrace_call_history_from; | |
2223 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2224 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
2225 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2226 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2227 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2228 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2229 | ops->to_store_registers = record_btrace_store_registers; | |
2230 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2231 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2232 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2233 | ops->to_resume = record_btrace_resume; |
2234 | ops->to_wait = record_btrace_wait; | |
e8032dde | 2235 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2236 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2237 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2238 | ops->to_goto_record_end = record_btrace_goto_end; | |
2239 | ops->to_goto_record = record_btrace_goto; | |
52834460 MM |
2240 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
2241 | ops->to_decr_pc_after_break = record_btrace_decr_pc_after_break; | |
70ad5bff | 2242 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2243 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2244 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2245 | ops->to_stratum = record_stratum; |
2246 | ops->to_magic = OPS_MAGIC; | |
2247 | } | |
2248 | ||
f4abbc16 MM |
2249 | /* Start recording in BTS format. */ |
2250 | ||
2251 | static void | |
2252 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2253 | { | |
2254 | volatile struct gdb_exception exception; | |
2255 | ||
2256 | if (args != NULL && *args != 0) | |
2257 | error (_("Invalid argument.")); | |
2258 | ||
2259 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2260 | ||
2261 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
2262 | execute_command ("target record-btrace", from_tty); | |
2263 | ||
2264 | if (exception.error != 0) | |
2265 | { | |
2266 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2267 | throw_exception (exception); | |
2268 | } | |
2269 | } | |
2270 | ||
afedecd3 MM |
2271 | /* Alias for "target record". */ |
2272 | ||
2273 | static void | |
2274 | cmd_record_btrace_start (char *args, int from_tty) | |
2275 | { | |
f4abbc16 MM |
2276 | volatile struct gdb_exception exception; |
2277 | ||
afedecd3 MM |
2278 | if (args != NULL && *args != 0) |
2279 | error (_("Invalid argument.")); | |
2280 | ||
f4abbc16 MM |
2281 | record_btrace_conf.format = BTRACE_FORMAT_BTS; |
2282 | ||
2283 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
2284 | execute_command ("target record-btrace", from_tty); | |
2285 | ||
2286 | if (exception.error == 0) | |
2287 | return; | |
2288 | ||
2289 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2290 | throw_exception (exception); | |
afedecd3 MM |
2291 | } |
2292 | ||
67b5c0c1 MM |
2293 | /* The "set record btrace" command. */ |
2294 | ||
2295 | static void | |
2296 | cmd_set_record_btrace (char *args, int from_tty) | |
2297 | { | |
2298 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2299 | } | |
2300 | ||
2301 | /* The "show record btrace" command. */ | |
2302 | ||
2303 | static void | |
2304 | cmd_show_record_btrace (char *args, int from_tty) | |
2305 | { | |
2306 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2307 | } | |
2308 | ||
2309 | /* The "show record btrace replay-memory-access" command. */ | |
2310 | ||
2311 | static void | |
2312 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2313 | struct cmd_list_element *c, const char *value) | |
2314 | { | |
2315 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2316 | replay_memory_access); | |
2317 | } | |
2318 | ||
d33501a5 MM |
2319 | /* The "set record btrace bts" command. */ |
2320 | ||
2321 | static void | |
2322 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
2323 | { | |
2324 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
2325 | "by an apporpriate subcommand.\n")); | |
2326 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", | |
2327 | all_commands, gdb_stdout); | |
2328 | } | |
2329 | ||
2330 | /* The "show record btrace bts" command. */ | |
2331 | ||
2332 | static void | |
2333 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
2334 | { | |
2335 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
2336 | } | |
2337 | ||
afedecd3 MM |
2338 | void _initialize_record_btrace (void); |
2339 | ||
2340 | /* Initialize btrace commands. */ | |
2341 | ||
2342 | void | |
2343 | _initialize_record_btrace (void) | |
2344 | { | |
f4abbc16 MM |
2345 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
2346 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
2347 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
2348 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
2349 | ||
f4abbc16 MM |
2350 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
2351 | _("\ | |
2352 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
2353 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
2354 | This format may not be available on all processors."), | |
2355 | &record_btrace_cmdlist); | |
2356 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
2357 | ||
67b5c0c1 MM |
2358 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
2359 | _("Set record options"), &set_record_btrace_cmdlist, | |
2360 | "set record btrace ", 0, &set_record_cmdlist); | |
2361 | ||
2362 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
2363 | _("Show record options"), &show_record_btrace_cmdlist, | |
2364 | "show record btrace ", 0, &show_record_cmdlist); | |
2365 | ||
2366 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
2367 | replay_memory_access_types, &replay_memory_access, _("\ | |
2368 | Set what memory accesses are allowed during replay."), _("\ | |
2369 | Show what memory accesses are allowed during replay."), | |
2370 | _("Default is READ-ONLY.\n\n\ | |
2371 | The btrace record target does not trace data.\n\ | |
2372 | The memory therefore corresponds to the live target and not \ | |
2373 | to the current replay position.\n\n\ | |
2374 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
2375 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
2376 | replay."), | |
2377 | NULL, cmd_show_replay_memory_access, | |
2378 | &set_record_btrace_cmdlist, | |
2379 | &show_record_btrace_cmdlist); | |
2380 | ||
d33501a5 MM |
2381 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
2382 | _("Set record btrace bts options"), | |
2383 | &set_record_btrace_bts_cmdlist, | |
2384 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
2385 | ||
2386 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
2387 | _("Show record btrace bts options"), | |
2388 | &show_record_btrace_bts_cmdlist, | |
2389 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
2390 | ||
2391 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2392 | &record_btrace_conf.bts.size, | |
2393 | _("Set the record/replay bts buffer size."), | |
2394 | _("Show the record/replay bts buffer size."), _("\ | |
2395 | When starting recording request a trace buffer of this size. \ | |
2396 | The actual buffer size may differ from the requested size. \ | |
2397 | Use \"info record\" to see the actual buffer size.\n\n\ | |
2398 | Bigger buffers allow longer recording but also take more time to process \ | |
2399 | the recorded execution trace.\n\n\ | |
2400 | The trace buffer size may not be changed while recording."), NULL, NULL, | |
2401 | &set_record_btrace_bts_cmdlist, | |
2402 | &show_record_btrace_bts_cmdlist); | |
2403 | ||
afedecd3 MM |
2404 | init_record_btrace_ops (); |
2405 | add_target (&record_btrace_ops); | |
0b722aec MM |
2406 | |
2407 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
2408 | xcalloc, xfree); | |
d33501a5 MM |
2409 | |
2410 | record_btrace_conf.bts.size = 64 * 1024; | |
afedecd3 | 2411 | } |