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". */ |
80 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
81 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
82 | ||
83 | /* Command lists for "set/show record btrace bts". */ | |
84 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
85 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
86 | ||
afedecd3 MM |
87 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
88 | ambiguities when used in if statements. */ | |
89 | ||
90 | #define DEBUG(msg, args...) \ | |
91 | do \ | |
92 | { \ | |
93 | if (record_debug != 0) \ | |
94 | fprintf_unfiltered (gdb_stdlog, \ | |
95 | "[record-btrace] " msg "\n", ##args); \ | |
96 | } \ | |
97 | while (0) | |
98 | ||
99 | ||
100 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 101 | thread_info. |
afedecd3 MM |
102 | |
103 | Throws an error if there is no thread or no trace. This function never | |
104 | returns NULL. */ | |
105 | ||
066ce621 MM |
106 | static struct thread_info * |
107 | require_btrace_thread (void) | |
afedecd3 MM |
108 | { |
109 | struct thread_info *tp; | |
afedecd3 MM |
110 | |
111 | DEBUG ("require"); | |
112 | ||
113 | tp = find_thread_ptid (inferior_ptid); | |
114 | if (tp == NULL) | |
115 | error (_("No thread.")); | |
116 | ||
117 | btrace_fetch (tp); | |
118 | ||
6e07b1d2 | 119 | if (btrace_is_empty (tp)) |
afedecd3 MM |
120 | error (_("No trace.")); |
121 | ||
066ce621 MM |
122 | return tp; |
123 | } | |
124 | ||
125 | /* Update the branch trace for the current thread and return a pointer to its | |
126 | branch trace information struct. | |
127 | ||
128 | Throws an error if there is no thread or no trace. This function never | |
129 | returns NULL. */ | |
130 | ||
131 | static struct btrace_thread_info * | |
132 | require_btrace (void) | |
133 | { | |
134 | struct thread_info *tp; | |
135 | ||
136 | tp = require_btrace_thread (); | |
137 | ||
138 | return &tp->btrace; | |
afedecd3 MM |
139 | } |
140 | ||
141 | /* Enable branch tracing for one thread. Warn on errors. */ | |
142 | ||
143 | static void | |
144 | record_btrace_enable_warn (struct thread_info *tp) | |
145 | { | |
146 | volatile struct gdb_exception error; | |
147 | ||
148 | TRY_CATCH (error, RETURN_MASK_ERROR) | |
f4abbc16 | 149 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
150 | |
151 | if (error.message != NULL) | |
152 | warning ("%s", error.message); | |
153 | } | |
154 | ||
155 | /* Callback function to disable branch tracing for one thread. */ | |
156 | ||
157 | static void | |
158 | record_btrace_disable_callback (void *arg) | |
159 | { | |
160 | struct thread_info *tp; | |
161 | ||
162 | tp = arg; | |
163 | ||
164 | btrace_disable (tp); | |
165 | } | |
166 | ||
167 | /* Enable automatic tracing of new threads. */ | |
168 | ||
169 | static void | |
170 | record_btrace_auto_enable (void) | |
171 | { | |
172 | DEBUG ("attach thread observer"); | |
173 | ||
174 | record_btrace_thread_observer | |
175 | = observer_attach_new_thread (record_btrace_enable_warn); | |
176 | } | |
177 | ||
178 | /* Disable automatic tracing of new threads. */ | |
179 | ||
180 | static void | |
181 | record_btrace_auto_disable (void) | |
182 | { | |
183 | /* The observer may have been detached, already. */ | |
184 | if (record_btrace_thread_observer == NULL) | |
185 | return; | |
186 | ||
187 | DEBUG ("detach thread observer"); | |
188 | ||
189 | observer_detach_new_thread (record_btrace_thread_observer); | |
190 | record_btrace_thread_observer = NULL; | |
191 | } | |
192 | ||
70ad5bff MM |
193 | /* The record-btrace async event handler function. */ |
194 | ||
195 | static void | |
196 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
197 | { | |
198 | inferior_event_handler (INF_REG_EVENT, NULL); | |
199 | } | |
200 | ||
afedecd3 MM |
201 | /* The to_open method of target record-btrace. */ |
202 | ||
203 | static void | |
014f9477 | 204 | record_btrace_open (const char *args, int from_tty) |
afedecd3 MM |
205 | { |
206 | struct cleanup *disable_chain; | |
207 | struct thread_info *tp; | |
208 | ||
209 | DEBUG ("open"); | |
210 | ||
8213266a | 211 | record_preopen (); |
afedecd3 MM |
212 | |
213 | if (!target_has_execution) | |
214 | error (_("The program is not being run.")); | |
215 | ||
52834460 MM |
216 | if (non_stop) |
217 | error (_("Record btrace can't debug inferior in non-stop mode.")); | |
218 | ||
afedecd3 MM |
219 | gdb_assert (record_btrace_thread_observer == NULL); |
220 | ||
221 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 222 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
223 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->num)) |
224 | { | |
f4abbc16 | 225 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
226 | |
227 | make_cleanup (record_btrace_disable_callback, tp); | |
228 | } | |
229 | ||
230 | record_btrace_auto_enable (); | |
231 | ||
232 | push_target (&record_btrace_ops); | |
233 | ||
70ad5bff MM |
234 | record_btrace_async_inferior_event_handler |
235 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
236 | NULL); | |
aef92902 | 237 | record_btrace_generating_corefile = 0; |
70ad5bff | 238 | |
afedecd3 MM |
239 | observer_notify_record_changed (current_inferior (), 1); |
240 | ||
241 | discard_cleanups (disable_chain); | |
242 | } | |
243 | ||
244 | /* The to_stop_recording method of target record-btrace. */ | |
245 | ||
246 | static void | |
c6cd7c02 | 247 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
248 | { |
249 | struct thread_info *tp; | |
250 | ||
251 | DEBUG ("stop recording"); | |
252 | ||
253 | record_btrace_auto_disable (); | |
254 | ||
034f788c | 255 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
256 | if (tp->btrace.target != NULL) |
257 | btrace_disable (tp); | |
258 | } | |
259 | ||
260 | /* The to_close method of target record-btrace. */ | |
261 | ||
262 | static void | |
de90e03d | 263 | record_btrace_close (struct target_ops *self) |
afedecd3 | 264 | { |
568e808b MM |
265 | struct thread_info *tp; |
266 | ||
70ad5bff MM |
267 | if (record_btrace_async_inferior_event_handler != NULL) |
268 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
269 | ||
99c819ee MM |
270 | /* Make sure automatic recording gets disabled even if we did not stop |
271 | recording before closing the record-btrace target. */ | |
272 | record_btrace_auto_disable (); | |
273 | ||
568e808b MM |
274 | /* We should have already stopped recording. |
275 | Tear down btrace in case we have not. */ | |
034f788c | 276 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 277 | btrace_teardown (tp); |
afedecd3 MM |
278 | } |
279 | ||
b7d2e916 PA |
280 | /* The to_async method of target record-btrace. */ |
281 | ||
282 | static void | |
283 | record_btrace_async (struct target_ops *ops, | |
284 | void (*callback) (enum inferior_event_type event_type, | |
285 | void *context), | |
286 | void *context) | |
287 | { | |
288 | if (callback != NULL) | |
289 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
290 | else | |
291 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
292 | ||
293 | ops->beneath->to_async (ops->beneath, callback, context); | |
294 | } | |
295 | ||
d33501a5 MM |
296 | /* Adjusts the size and returns a human readable size suffix. */ |
297 | ||
298 | static const char * | |
299 | record_btrace_adjust_size (unsigned int *size) | |
300 | { | |
301 | unsigned int sz; | |
302 | ||
303 | sz = *size; | |
304 | ||
305 | if ((sz & ((1u << 30) - 1)) == 0) | |
306 | { | |
307 | *size = sz >> 30; | |
308 | return "GB"; | |
309 | } | |
310 | else if ((sz & ((1u << 20) - 1)) == 0) | |
311 | { | |
312 | *size = sz >> 20; | |
313 | return "MB"; | |
314 | } | |
315 | else if ((sz & ((1u << 10) - 1)) == 0) | |
316 | { | |
317 | *size = sz >> 10; | |
318 | return "kB"; | |
319 | } | |
320 | else | |
321 | return ""; | |
322 | } | |
323 | ||
324 | /* Print a BTS configuration. */ | |
325 | ||
326 | static void | |
327 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
328 | { | |
329 | const char *suffix; | |
330 | unsigned int size; | |
331 | ||
332 | size = conf->size; | |
333 | if (size > 0) | |
334 | { | |
335 | suffix = record_btrace_adjust_size (&size); | |
336 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
337 | } | |
338 | } | |
339 | ||
340 | /* Print a branch tracing configuration. */ | |
341 | ||
342 | static void | |
343 | record_btrace_print_conf (const struct btrace_config *conf) | |
344 | { | |
345 | printf_unfiltered (_("Recording format: %s.\n"), | |
346 | btrace_format_string (conf->format)); | |
347 | ||
348 | switch (conf->format) | |
349 | { | |
350 | case BTRACE_FORMAT_NONE: | |
351 | return; | |
352 | ||
353 | case BTRACE_FORMAT_BTS: | |
354 | record_btrace_print_bts_conf (&conf->bts); | |
355 | return; | |
356 | } | |
357 | ||
358 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
359 | } | |
360 | ||
afedecd3 MM |
361 | /* The to_info_record method of target record-btrace. */ |
362 | ||
363 | static void | |
630d6a4a | 364 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
365 | { |
366 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 367 | const struct btrace_config *conf; |
afedecd3 | 368 | struct thread_info *tp; |
31fd9caa | 369 | unsigned int insns, calls, gaps; |
afedecd3 MM |
370 | |
371 | DEBUG ("info"); | |
372 | ||
373 | tp = find_thread_ptid (inferior_ptid); | |
374 | if (tp == NULL) | |
375 | error (_("No thread.")); | |
376 | ||
f4abbc16 MM |
377 | btinfo = &tp->btrace; |
378 | ||
379 | conf = btrace_conf (btinfo); | |
380 | if (conf != NULL) | |
d33501a5 | 381 | record_btrace_print_conf (conf); |
f4abbc16 | 382 | |
afedecd3 MM |
383 | btrace_fetch (tp); |
384 | ||
23a7fe75 MM |
385 | insns = 0; |
386 | calls = 0; | |
31fd9caa | 387 | gaps = 0; |
23a7fe75 | 388 | |
6e07b1d2 | 389 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
390 | { |
391 | struct btrace_call_iterator call; | |
392 | struct btrace_insn_iterator insn; | |
393 | ||
394 | btrace_call_end (&call, btinfo); | |
395 | btrace_call_prev (&call, 1); | |
5de9129b | 396 | calls = btrace_call_number (&call); |
23a7fe75 MM |
397 | |
398 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 399 | |
5de9129b | 400 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
401 | if (insns != 0) |
402 | { | |
403 | /* The last instruction does not really belong to the trace. */ | |
404 | insns -= 1; | |
405 | } | |
406 | else | |
407 | { | |
408 | unsigned int steps; | |
409 | ||
410 | /* Skip gaps at the end. */ | |
411 | do | |
412 | { | |
413 | steps = btrace_insn_prev (&insn, 1); | |
414 | if (steps == 0) | |
415 | break; | |
416 | ||
417 | insns = btrace_insn_number (&insn); | |
418 | } | |
419 | while (insns == 0); | |
420 | } | |
421 | ||
422 | gaps = btinfo->ngaps; | |
23a7fe75 | 423 | } |
afedecd3 | 424 | |
31fd9caa MM |
425 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
426 | "for thread %d (%s).\n"), insns, calls, gaps, | |
427 | tp->num, target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
428 | |
429 | if (btrace_is_replaying (tp)) | |
430 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
431 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
432 | } |
433 | ||
31fd9caa MM |
434 | /* Print a decode error. */ |
435 | ||
436 | static void | |
437 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
438 | enum btrace_format format) | |
439 | { | |
440 | const char *errstr; | |
441 | int is_error; | |
442 | ||
443 | errstr = _("unknown"); | |
444 | is_error = 1; | |
445 | ||
446 | switch (format) | |
447 | { | |
448 | default: | |
449 | break; | |
450 | ||
451 | case BTRACE_FORMAT_BTS: | |
452 | switch (errcode) | |
453 | { | |
454 | default: | |
455 | break; | |
456 | ||
457 | case BDE_BTS_OVERFLOW: | |
458 | errstr = _("instruction overflow"); | |
459 | break; | |
460 | ||
461 | case BDE_BTS_INSN_SIZE: | |
462 | errstr = _("unknown instruction"); | |
463 | break; | |
464 | } | |
465 | break; | |
466 | } | |
467 | ||
468 | ui_out_text (uiout, _("[")); | |
469 | if (is_error) | |
470 | { | |
471 | ui_out_text (uiout, _("decode error (")); | |
472 | ui_out_field_int (uiout, "errcode", errcode); | |
473 | ui_out_text (uiout, _("): ")); | |
474 | } | |
475 | ui_out_text (uiout, errstr); | |
476 | ui_out_text (uiout, _("]\n")); | |
477 | } | |
478 | ||
afedecd3 MM |
479 | /* Print an unsigned int. */ |
480 | ||
481 | static void | |
482 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
483 | { | |
484 | ui_out_field_fmt (uiout, fld, "%u", val); | |
485 | } | |
486 | ||
487 | /* Disassemble a section of the recorded instruction trace. */ | |
488 | ||
489 | static void | |
23a7fe75 | 490 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 491 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
492 | const struct btrace_insn_iterator *begin, |
493 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 MM |
494 | { |
495 | struct gdbarch *gdbarch; | |
23a7fe75 | 496 | struct btrace_insn_iterator it; |
afedecd3 | 497 | |
23a7fe75 MM |
498 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
499 | btrace_insn_number (end)); | |
afedecd3 MM |
500 | |
501 | gdbarch = target_gdbarch (); | |
502 | ||
23a7fe75 | 503 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 504 | { |
23a7fe75 MM |
505 | const struct btrace_insn *insn; |
506 | ||
507 | insn = btrace_insn_get (&it); | |
508 | ||
31fd9caa MM |
509 | /* A NULL instruction indicates a gap in the trace. */ |
510 | if (insn == NULL) | |
511 | { | |
512 | const struct btrace_config *conf; | |
513 | ||
514 | conf = btrace_conf (btinfo); | |
afedecd3 | 515 | |
31fd9caa MM |
516 | /* We have trace so we must have a configuration. */ |
517 | gdb_assert (conf != NULL); | |
518 | ||
519 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
520 | conf->format); | |
521 | } | |
522 | else | |
523 | { | |
524 | /* Print the instruction index. */ | |
525 | ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); | |
526 | ui_out_text (uiout, "\t"); | |
527 | ||
528 | /* Disassembly with '/m' flag may not produce the expected result. | |
529 | See PR gdb/11833. */ | |
530 | gdb_disassembly (gdbarch, uiout, NULL, flags, 1, insn->pc, | |
531 | insn->pc + 1); | |
532 | } | |
afedecd3 MM |
533 | } |
534 | } | |
535 | ||
536 | /* The to_insn_history method of target record-btrace. */ | |
537 | ||
538 | static void | |
7a6c5609 | 539 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
540 | { |
541 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
542 | struct btrace_insn_history *history; |
543 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
544 | struct cleanup *uiout_cleanup; |
545 | struct ui_out *uiout; | |
23a7fe75 | 546 | unsigned int context, covered; |
afedecd3 MM |
547 | |
548 | uiout = current_uiout; | |
549 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
550 | "insn history"); | |
afedecd3 | 551 | context = abs (size); |
afedecd3 MM |
552 | if (context == 0) |
553 | error (_("Bad record instruction-history-size.")); | |
554 | ||
23a7fe75 MM |
555 | btinfo = require_btrace (); |
556 | history = btinfo->insn_history; | |
557 | if (history == NULL) | |
afedecd3 | 558 | { |
07bbe694 | 559 | struct btrace_insn_iterator *replay; |
afedecd3 | 560 | |
23a7fe75 | 561 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 562 | |
07bbe694 MM |
563 | /* If we're replaying, we start at the replay position. Otherwise, we |
564 | start at the tail of the trace. */ | |
565 | replay = btinfo->replay; | |
566 | if (replay != NULL) | |
567 | begin = *replay; | |
568 | else | |
569 | btrace_insn_end (&begin, btinfo); | |
570 | ||
571 | /* We start from here and expand in the requested direction. Then we | |
572 | expand in the other direction, as well, to fill up any remaining | |
573 | context. */ | |
574 | end = begin; | |
575 | if (size < 0) | |
576 | { | |
577 | /* We want the current position covered, as well. */ | |
578 | covered = btrace_insn_next (&end, 1); | |
579 | covered += btrace_insn_prev (&begin, context - covered); | |
580 | covered += btrace_insn_next (&end, context - covered); | |
581 | } | |
582 | else | |
583 | { | |
584 | covered = btrace_insn_next (&end, context); | |
585 | covered += btrace_insn_prev (&begin, context - covered); | |
586 | } | |
afedecd3 MM |
587 | } |
588 | else | |
589 | { | |
23a7fe75 MM |
590 | begin = history->begin; |
591 | end = history->end; | |
afedecd3 | 592 | |
23a7fe75 MM |
593 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
594 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 595 | |
23a7fe75 MM |
596 | if (size < 0) |
597 | { | |
598 | end = begin; | |
599 | covered = btrace_insn_prev (&begin, context); | |
600 | } | |
601 | else | |
602 | { | |
603 | begin = end; | |
604 | covered = btrace_insn_next (&end, context); | |
605 | } | |
afedecd3 MM |
606 | } |
607 | ||
23a7fe75 | 608 | if (covered > 0) |
31fd9caa | 609 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
610 | else |
611 | { | |
612 | if (size < 0) | |
613 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
614 | else | |
615 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
616 | } | |
afedecd3 | 617 | |
23a7fe75 | 618 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
619 | do_cleanups (uiout_cleanup); |
620 | } | |
621 | ||
622 | /* The to_insn_history_range method of target record-btrace. */ | |
623 | ||
624 | static void | |
4e99c6b7 TT |
625 | record_btrace_insn_history_range (struct target_ops *self, |
626 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
627 | { |
628 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
629 | struct btrace_insn_history *history; |
630 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
631 | struct cleanup *uiout_cleanup; |
632 | struct ui_out *uiout; | |
23a7fe75 MM |
633 | unsigned int low, high; |
634 | int found; | |
afedecd3 MM |
635 | |
636 | uiout = current_uiout; | |
637 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
638 | "insn history"); | |
23a7fe75 MM |
639 | low = from; |
640 | high = to; | |
afedecd3 | 641 | |
23a7fe75 | 642 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
643 | |
644 | /* Check for wrap-arounds. */ | |
23a7fe75 | 645 | if (low != from || high != to) |
afedecd3 MM |
646 | error (_("Bad range.")); |
647 | ||
0688d04e | 648 | if (high < low) |
afedecd3 MM |
649 | error (_("Bad range.")); |
650 | ||
23a7fe75 | 651 | btinfo = require_btrace (); |
afedecd3 | 652 | |
23a7fe75 MM |
653 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
654 | if (found == 0) | |
655 | error (_("Range out of bounds.")); | |
afedecd3 | 656 | |
23a7fe75 MM |
657 | found = btrace_find_insn_by_number (&end, btinfo, high); |
658 | if (found == 0) | |
0688d04e MM |
659 | { |
660 | /* Silently truncate the range. */ | |
661 | btrace_insn_end (&end, btinfo); | |
662 | } | |
663 | else | |
664 | { | |
665 | /* We want both begin and end to be inclusive. */ | |
666 | btrace_insn_next (&end, 1); | |
667 | } | |
afedecd3 | 668 | |
31fd9caa | 669 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 670 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
671 | |
672 | do_cleanups (uiout_cleanup); | |
673 | } | |
674 | ||
675 | /* The to_insn_history_from method of target record-btrace. */ | |
676 | ||
677 | static void | |
9abc3ff3 TT |
678 | record_btrace_insn_history_from (struct target_ops *self, |
679 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
680 | { |
681 | ULONGEST begin, end, context; | |
682 | ||
683 | context = abs (size); | |
0688d04e MM |
684 | if (context == 0) |
685 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
686 | |
687 | if (size < 0) | |
688 | { | |
689 | end = from; | |
690 | ||
691 | if (from < context) | |
692 | begin = 0; | |
693 | else | |
0688d04e | 694 | begin = from - context + 1; |
afedecd3 MM |
695 | } |
696 | else | |
697 | { | |
698 | begin = from; | |
0688d04e | 699 | end = from + context - 1; |
afedecd3 MM |
700 | |
701 | /* Check for wrap-around. */ | |
702 | if (end < begin) | |
703 | end = ULONGEST_MAX; | |
704 | } | |
705 | ||
4e99c6b7 | 706 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
707 | } |
708 | ||
709 | /* Print the instruction number range for a function call history line. */ | |
710 | ||
711 | static void | |
23a7fe75 MM |
712 | btrace_call_history_insn_range (struct ui_out *uiout, |
713 | const struct btrace_function *bfun) | |
afedecd3 | 714 | { |
7acbe133 MM |
715 | unsigned int begin, end, size; |
716 | ||
717 | size = VEC_length (btrace_insn_s, bfun->insn); | |
718 | gdb_assert (size > 0); | |
afedecd3 | 719 | |
23a7fe75 | 720 | begin = bfun->insn_offset; |
7acbe133 | 721 | end = begin + size - 1; |
afedecd3 | 722 | |
23a7fe75 | 723 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 724 | ui_out_text (uiout, ","); |
23a7fe75 | 725 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
726 | } |
727 | ||
728 | /* Print the source line information for a function call history line. */ | |
729 | ||
730 | static void | |
23a7fe75 MM |
731 | btrace_call_history_src_line (struct ui_out *uiout, |
732 | const struct btrace_function *bfun) | |
afedecd3 MM |
733 | { |
734 | struct symbol *sym; | |
23a7fe75 | 735 | int begin, end; |
afedecd3 MM |
736 | |
737 | sym = bfun->sym; | |
738 | if (sym == NULL) | |
739 | return; | |
740 | ||
741 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 742 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 743 | |
23a7fe75 MM |
744 | begin = bfun->lbegin; |
745 | end = bfun->lend; | |
746 | ||
747 | if (end < begin) | |
afedecd3 MM |
748 | return; |
749 | ||
750 | ui_out_text (uiout, ":"); | |
23a7fe75 | 751 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 752 | |
23a7fe75 | 753 | if (end == begin) |
afedecd3 MM |
754 | return; |
755 | ||
8710b709 | 756 | ui_out_text (uiout, ","); |
23a7fe75 | 757 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
758 | } |
759 | ||
0b722aec MM |
760 | /* Get the name of a branch trace function. */ |
761 | ||
762 | static const char * | |
763 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
764 | { | |
765 | struct minimal_symbol *msym; | |
766 | struct symbol *sym; | |
767 | ||
768 | if (bfun == NULL) | |
769 | return "??"; | |
770 | ||
771 | msym = bfun->msym; | |
772 | sym = bfun->sym; | |
773 | ||
774 | if (sym != NULL) | |
775 | return SYMBOL_PRINT_NAME (sym); | |
776 | else if (msym != NULL) | |
efd66ac6 | 777 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
778 | else |
779 | return "??"; | |
780 | } | |
781 | ||
afedecd3 MM |
782 | /* Disassemble a section of the recorded function trace. */ |
783 | ||
784 | static void | |
23a7fe75 | 785 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 786 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
787 | const struct btrace_call_iterator *begin, |
788 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
789 | enum record_print_flag flags) |
790 | { | |
23a7fe75 | 791 | struct btrace_call_iterator it; |
afedecd3 | 792 | |
23a7fe75 MM |
793 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
794 | btrace_call_number (end)); | |
afedecd3 | 795 | |
23a7fe75 | 796 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 797 | { |
23a7fe75 MM |
798 | const struct btrace_function *bfun; |
799 | struct minimal_symbol *msym; | |
800 | struct symbol *sym; | |
801 | ||
802 | bfun = btrace_call_get (&it); | |
23a7fe75 | 803 | sym = bfun->sym; |
0b722aec | 804 | msym = bfun->msym; |
23a7fe75 | 805 | |
afedecd3 | 806 | /* Print the function index. */ |
23a7fe75 | 807 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
808 | ui_out_text (uiout, "\t"); |
809 | ||
31fd9caa MM |
810 | /* Indicate gaps in the trace. */ |
811 | if (bfun->errcode != 0) | |
812 | { | |
813 | const struct btrace_config *conf; | |
814 | ||
815 | conf = btrace_conf (btinfo); | |
816 | ||
817 | /* We have trace so we must have a configuration. */ | |
818 | gdb_assert (conf != NULL); | |
819 | ||
820 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
821 | ||
822 | continue; | |
823 | } | |
824 | ||
8710b709 MM |
825 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
826 | { | |
827 | int level = bfun->level + btinfo->level, i; | |
828 | ||
829 | for (i = 0; i < level; ++i) | |
830 | ui_out_text (uiout, " "); | |
831 | } | |
832 | ||
833 | if (sym != NULL) | |
834 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
835 | else if (msym != NULL) | |
efd66ac6 | 836 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
837 | else if (!ui_out_is_mi_like_p (uiout)) |
838 | ui_out_field_string (uiout, "function", "??"); | |
839 | ||
1e038f67 | 840 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 841 | { |
8710b709 | 842 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 843 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
844 | } |
845 | ||
1e038f67 | 846 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 847 | { |
8710b709 | 848 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 849 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
850 | } |
851 | ||
afedecd3 MM |
852 | ui_out_text (uiout, "\n"); |
853 | } | |
854 | } | |
855 | ||
856 | /* The to_call_history method of target record-btrace. */ | |
857 | ||
858 | static void | |
5df2fcba | 859 | record_btrace_call_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
860 | { |
861 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
862 | struct btrace_call_history *history; |
863 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
864 | struct cleanup *uiout_cleanup; |
865 | struct ui_out *uiout; | |
23a7fe75 | 866 | unsigned int context, covered; |
afedecd3 MM |
867 | |
868 | uiout = current_uiout; | |
869 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
870 | "insn history"); | |
afedecd3 | 871 | context = abs (size); |
afedecd3 MM |
872 | if (context == 0) |
873 | error (_("Bad record function-call-history-size.")); | |
874 | ||
23a7fe75 MM |
875 | btinfo = require_btrace (); |
876 | history = btinfo->call_history; | |
877 | if (history == NULL) | |
afedecd3 | 878 | { |
07bbe694 | 879 | struct btrace_insn_iterator *replay; |
afedecd3 | 880 | |
23a7fe75 | 881 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 882 | |
07bbe694 MM |
883 | /* If we're replaying, we start at the replay position. Otherwise, we |
884 | start at the tail of the trace. */ | |
885 | replay = btinfo->replay; | |
886 | if (replay != NULL) | |
887 | { | |
888 | begin.function = replay->function; | |
889 | begin.btinfo = btinfo; | |
890 | } | |
891 | else | |
892 | btrace_call_end (&begin, btinfo); | |
893 | ||
894 | /* We start from here and expand in the requested direction. Then we | |
895 | expand in the other direction, as well, to fill up any remaining | |
896 | context. */ | |
897 | end = begin; | |
898 | if (size < 0) | |
899 | { | |
900 | /* We want the current position covered, as well. */ | |
901 | covered = btrace_call_next (&end, 1); | |
902 | covered += btrace_call_prev (&begin, context - covered); | |
903 | covered += btrace_call_next (&end, context - covered); | |
904 | } | |
905 | else | |
906 | { | |
907 | covered = btrace_call_next (&end, context); | |
908 | covered += btrace_call_prev (&begin, context- covered); | |
909 | } | |
afedecd3 MM |
910 | } |
911 | else | |
912 | { | |
23a7fe75 MM |
913 | begin = history->begin; |
914 | end = history->end; | |
afedecd3 | 915 | |
23a7fe75 MM |
916 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
917 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 918 | |
23a7fe75 MM |
919 | if (size < 0) |
920 | { | |
921 | end = begin; | |
922 | covered = btrace_call_prev (&begin, context); | |
923 | } | |
924 | else | |
925 | { | |
926 | begin = end; | |
927 | covered = btrace_call_next (&end, context); | |
928 | } | |
afedecd3 MM |
929 | } |
930 | ||
23a7fe75 | 931 | if (covered > 0) |
8710b709 | 932 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
933 | else |
934 | { | |
935 | if (size < 0) | |
936 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
937 | else | |
938 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
939 | } | |
afedecd3 | 940 | |
23a7fe75 | 941 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
942 | do_cleanups (uiout_cleanup); |
943 | } | |
944 | ||
945 | /* The to_call_history_range method of target record-btrace. */ | |
946 | ||
947 | static void | |
f0d960ea TT |
948 | record_btrace_call_history_range (struct target_ops *self, |
949 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
950 | { |
951 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
952 | struct btrace_call_history *history; |
953 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
954 | struct cleanup *uiout_cleanup; |
955 | struct ui_out *uiout; | |
23a7fe75 MM |
956 | unsigned int low, high; |
957 | int found; | |
afedecd3 MM |
958 | |
959 | uiout = current_uiout; | |
960 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
961 | "func history"); | |
23a7fe75 MM |
962 | low = from; |
963 | high = to; | |
afedecd3 | 964 | |
23a7fe75 | 965 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
966 | |
967 | /* Check for wrap-arounds. */ | |
23a7fe75 | 968 | if (low != from || high != to) |
afedecd3 MM |
969 | error (_("Bad range.")); |
970 | ||
0688d04e | 971 | if (high < low) |
afedecd3 MM |
972 | error (_("Bad range.")); |
973 | ||
23a7fe75 | 974 | btinfo = require_btrace (); |
afedecd3 | 975 | |
23a7fe75 MM |
976 | found = btrace_find_call_by_number (&begin, btinfo, low); |
977 | if (found == 0) | |
978 | error (_("Range out of bounds.")); | |
afedecd3 | 979 | |
23a7fe75 MM |
980 | found = btrace_find_call_by_number (&end, btinfo, high); |
981 | if (found == 0) | |
0688d04e MM |
982 | { |
983 | /* Silently truncate the range. */ | |
984 | btrace_call_end (&end, btinfo); | |
985 | } | |
986 | else | |
987 | { | |
988 | /* We want both begin and end to be inclusive. */ | |
989 | btrace_call_next (&end, 1); | |
990 | } | |
afedecd3 | 991 | |
8710b709 | 992 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 993 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
994 | |
995 | do_cleanups (uiout_cleanup); | |
996 | } | |
997 | ||
998 | /* The to_call_history_from method of target record-btrace. */ | |
999 | ||
1000 | static void | |
ec0aea04 TT |
1001 | record_btrace_call_history_from (struct target_ops *self, |
1002 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
1003 | { |
1004 | ULONGEST begin, end, context; | |
1005 | ||
1006 | context = abs (size); | |
0688d04e MM |
1007 | if (context == 0) |
1008 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1009 | |
1010 | if (size < 0) | |
1011 | { | |
1012 | end = from; | |
1013 | ||
1014 | if (from < context) | |
1015 | begin = 0; | |
1016 | else | |
0688d04e | 1017 | begin = from - context + 1; |
afedecd3 MM |
1018 | } |
1019 | else | |
1020 | { | |
1021 | begin = from; | |
0688d04e | 1022 | end = from + context - 1; |
afedecd3 MM |
1023 | |
1024 | /* Check for wrap-around. */ | |
1025 | if (end < begin) | |
1026 | end = ULONGEST_MAX; | |
1027 | } | |
1028 | ||
f0d960ea | 1029 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1030 | } |
1031 | ||
07bbe694 MM |
1032 | /* The to_record_is_replaying method of target record-btrace. */ |
1033 | ||
1034 | static int | |
1c63c994 | 1035 | record_btrace_is_replaying (struct target_ops *self) |
07bbe694 MM |
1036 | { |
1037 | struct thread_info *tp; | |
1038 | ||
034f788c | 1039 | ALL_NON_EXITED_THREADS (tp) |
07bbe694 MM |
1040 | if (btrace_is_replaying (tp)) |
1041 | return 1; | |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
633785ff MM |
1046 | /* The to_xfer_partial method of target record-btrace. */ |
1047 | ||
9b409511 | 1048 | static enum target_xfer_status |
633785ff MM |
1049 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1050 | const char *annex, gdb_byte *readbuf, | |
1051 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1052 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1053 | { |
1054 | struct target_ops *t; | |
1055 | ||
1056 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1057 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1058 | && !record_btrace_generating_corefile |
67b5c0c1 | 1059 | && record_btrace_is_replaying (ops)) |
633785ff MM |
1060 | { |
1061 | switch (object) | |
1062 | { | |
1063 | case TARGET_OBJECT_MEMORY: | |
1064 | { | |
1065 | struct target_section *section; | |
1066 | ||
1067 | /* We do not allow writing memory in general. */ | |
1068 | if (writebuf != NULL) | |
9b409511 YQ |
1069 | { |
1070 | *xfered_len = len; | |
bc113b4e | 1071 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1072 | } |
633785ff MM |
1073 | |
1074 | /* We allow reading readonly memory. */ | |
1075 | section = target_section_by_addr (ops, offset); | |
1076 | if (section != NULL) | |
1077 | { | |
1078 | /* Check if the section we found is readonly. */ | |
1079 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1080 | section->the_bfd_section) | |
1081 | & SEC_READONLY) != 0) | |
1082 | { | |
1083 | /* Truncate the request to fit into this section. */ | |
1084 | len = min (len, section->endaddr - offset); | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | ||
9b409511 | 1089 | *xfered_len = len; |
bc113b4e | 1090 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1091 | } |
1092 | } | |
1093 | } | |
1094 | ||
1095 | /* Forward the request. */ | |
e75fdfca TT |
1096 | ops = ops->beneath; |
1097 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1098 | offset, len, xfered_len); | |
633785ff MM |
1099 | } |
1100 | ||
1101 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1102 | ||
1103 | static int | |
1104 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1105 | struct gdbarch *gdbarch, | |
1106 | struct bp_target_info *bp_tgt) | |
1107 | { | |
1108 | volatile struct gdb_exception except; | |
67b5c0c1 MM |
1109 | const char *old; |
1110 | int ret; | |
633785ff MM |
1111 | |
1112 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1113 | duration of this function. */ | |
67b5c0c1 MM |
1114 | old = replay_memory_access; |
1115 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1116 | |
1117 | ret = 0; | |
1118 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 1119 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff | 1120 | |
67b5c0c1 | 1121 | replay_memory_access = old; |
633785ff MM |
1122 | |
1123 | if (except.reason < 0) | |
1124 | throw_exception (except); | |
1125 | ||
1126 | return ret; | |
1127 | } | |
1128 | ||
1129 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1130 | ||
1131 | static int | |
1132 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1133 | struct gdbarch *gdbarch, | |
1134 | struct bp_target_info *bp_tgt) | |
1135 | { | |
1136 | volatile struct gdb_exception except; | |
67b5c0c1 MM |
1137 | const char *old; |
1138 | int ret; | |
633785ff MM |
1139 | |
1140 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1141 | duration of this function. */ | |
67b5c0c1 MM |
1142 | old = replay_memory_access; |
1143 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1144 | |
1145 | ret = 0; | |
1146 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 1147 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff | 1148 | |
67b5c0c1 | 1149 | replay_memory_access = old; |
633785ff MM |
1150 | |
1151 | if (except.reason < 0) | |
1152 | throw_exception (except); | |
1153 | ||
1154 | return ret; | |
1155 | } | |
1156 | ||
1f3ef581 MM |
1157 | /* The to_fetch_registers method of target record-btrace. */ |
1158 | ||
1159 | static void | |
1160 | record_btrace_fetch_registers (struct target_ops *ops, | |
1161 | struct regcache *regcache, int regno) | |
1162 | { | |
1163 | struct btrace_insn_iterator *replay; | |
1164 | struct thread_info *tp; | |
1165 | ||
1166 | tp = find_thread_ptid (inferior_ptid); | |
1167 | gdb_assert (tp != NULL); | |
1168 | ||
1169 | replay = tp->btrace.replay; | |
aef92902 | 1170 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1171 | { |
1172 | const struct btrace_insn *insn; | |
1173 | struct gdbarch *gdbarch; | |
1174 | int pcreg; | |
1175 | ||
1176 | gdbarch = get_regcache_arch (regcache); | |
1177 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1178 | if (pcreg < 0) | |
1179 | return; | |
1180 | ||
1181 | /* We can only provide the PC register. */ | |
1182 | if (regno >= 0 && regno != pcreg) | |
1183 | return; | |
1184 | ||
1185 | insn = btrace_insn_get (replay); | |
1186 | gdb_assert (insn != NULL); | |
1187 | ||
1188 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1189 | } | |
1190 | else | |
1191 | { | |
e75fdfca | 1192 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1193 | |
e75fdfca | 1194 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1195 | } |
1196 | } | |
1197 | ||
1198 | /* The to_store_registers method of target record-btrace. */ | |
1199 | ||
1200 | static void | |
1201 | record_btrace_store_registers (struct target_ops *ops, | |
1202 | struct regcache *regcache, int regno) | |
1203 | { | |
1204 | struct target_ops *t; | |
1205 | ||
aef92902 | 1206 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1207 | error (_("This record target does not allow writing registers.")); |
1208 | ||
1209 | gdb_assert (may_write_registers != 0); | |
1210 | ||
e75fdfca TT |
1211 | t = ops->beneath; |
1212 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1213 | } |
1214 | ||
1215 | /* The to_prepare_to_store method of target record-btrace. */ | |
1216 | ||
1217 | static void | |
1218 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1219 | struct regcache *regcache) | |
1220 | { | |
1221 | struct target_ops *t; | |
1222 | ||
aef92902 | 1223 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1224 | return; |
1225 | ||
e75fdfca TT |
1226 | t = ops->beneath; |
1227 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1228 | } |
1229 | ||
0b722aec MM |
1230 | /* The branch trace frame cache. */ |
1231 | ||
1232 | struct btrace_frame_cache | |
1233 | { | |
1234 | /* The thread. */ | |
1235 | struct thread_info *tp; | |
1236 | ||
1237 | /* The frame info. */ | |
1238 | struct frame_info *frame; | |
1239 | ||
1240 | /* The branch trace function segment. */ | |
1241 | const struct btrace_function *bfun; | |
1242 | }; | |
1243 | ||
1244 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1245 | ||
1246 | static htab_t bfcache; | |
1247 | ||
1248 | /* hash_f for htab_create_alloc of bfcache. */ | |
1249 | ||
1250 | static hashval_t | |
1251 | bfcache_hash (const void *arg) | |
1252 | { | |
1253 | const struct btrace_frame_cache *cache = arg; | |
1254 | ||
1255 | return htab_hash_pointer (cache->frame); | |
1256 | } | |
1257 | ||
1258 | /* eq_f for htab_create_alloc of bfcache. */ | |
1259 | ||
1260 | static int | |
1261 | bfcache_eq (const void *arg1, const void *arg2) | |
1262 | { | |
1263 | const struct btrace_frame_cache *cache1 = arg1; | |
1264 | const struct btrace_frame_cache *cache2 = arg2; | |
1265 | ||
1266 | return cache1->frame == cache2->frame; | |
1267 | } | |
1268 | ||
1269 | /* Create a new btrace frame cache. */ | |
1270 | ||
1271 | static struct btrace_frame_cache * | |
1272 | bfcache_new (struct frame_info *frame) | |
1273 | { | |
1274 | struct btrace_frame_cache *cache; | |
1275 | void **slot; | |
1276 | ||
1277 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1278 | cache->frame = frame; | |
1279 | ||
1280 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1281 | gdb_assert (*slot == NULL); | |
1282 | *slot = cache; | |
1283 | ||
1284 | return cache; | |
1285 | } | |
1286 | ||
1287 | /* Extract the branch trace function from a branch trace frame. */ | |
1288 | ||
1289 | static const struct btrace_function * | |
1290 | btrace_get_frame_function (struct frame_info *frame) | |
1291 | { | |
1292 | const struct btrace_frame_cache *cache; | |
1293 | const struct btrace_function *bfun; | |
1294 | struct btrace_frame_cache pattern; | |
1295 | void **slot; | |
1296 | ||
1297 | pattern.frame = frame; | |
1298 | ||
1299 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1300 | if (slot == NULL) | |
1301 | return NULL; | |
1302 | ||
1303 | cache = *slot; | |
1304 | return cache->bfun; | |
1305 | } | |
1306 | ||
cecac1ab MM |
1307 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1308 | ||
1309 | static enum unwind_stop_reason | |
1310 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1311 | void **this_cache) | |
1312 | { | |
0b722aec MM |
1313 | const struct btrace_frame_cache *cache; |
1314 | const struct btrace_function *bfun; | |
1315 | ||
1316 | cache = *this_cache; | |
1317 | bfun = cache->bfun; | |
1318 | gdb_assert (bfun != NULL); | |
1319 | ||
1320 | if (bfun->up == NULL) | |
1321 | return UNWIND_UNAVAILABLE; | |
1322 | ||
1323 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1324 | } |
1325 | ||
1326 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1327 | ||
1328 | static void | |
1329 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1330 | struct frame_id *this_id) | |
1331 | { | |
0b722aec MM |
1332 | const struct btrace_frame_cache *cache; |
1333 | const struct btrace_function *bfun; | |
1334 | CORE_ADDR code, special; | |
1335 | ||
1336 | cache = *this_cache; | |
1337 | ||
1338 | bfun = cache->bfun; | |
1339 | gdb_assert (bfun != NULL); | |
1340 | ||
1341 | while (bfun->segment.prev != NULL) | |
1342 | bfun = bfun->segment.prev; | |
1343 | ||
1344 | code = get_frame_func (this_frame); | |
1345 | special = bfun->number; | |
1346 | ||
1347 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1348 | ||
1349 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1350 | btrace_get_bfun_name (cache->bfun), | |
1351 | core_addr_to_string_nz (this_id->code_addr), | |
1352 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1353 | } |
1354 | ||
1355 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1356 | ||
1357 | static struct value * | |
1358 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1359 | void **this_cache, | |
1360 | int regnum) | |
1361 | { | |
0b722aec MM |
1362 | const struct btrace_frame_cache *cache; |
1363 | const struct btrace_function *bfun, *caller; | |
1364 | const struct btrace_insn *insn; | |
1365 | struct gdbarch *gdbarch; | |
1366 | CORE_ADDR pc; | |
1367 | int pcreg; | |
1368 | ||
1369 | gdbarch = get_frame_arch (this_frame); | |
1370 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1371 | if (pcreg < 0 || regnum != pcreg) | |
1372 | throw_error (NOT_AVAILABLE_ERROR, | |
1373 | _("Registers are not available in btrace record history")); | |
1374 | ||
1375 | cache = *this_cache; | |
1376 | bfun = cache->bfun; | |
1377 | gdb_assert (bfun != NULL); | |
1378 | ||
1379 | caller = bfun->up; | |
1380 | if (caller == NULL) | |
1381 | throw_error (NOT_AVAILABLE_ERROR, | |
1382 | _("No caller in btrace record history")); | |
1383 | ||
1384 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1385 | { | |
1386 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1387 | pc = insn->pc; | |
1388 | } | |
1389 | else | |
1390 | { | |
1391 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1392 | pc = insn->pc; | |
1393 | ||
1394 | pc += gdb_insn_length (gdbarch, pc); | |
1395 | } | |
1396 | ||
1397 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1398 | btrace_get_bfun_name (bfun), bfun->level, | |
1399 | core_addr_to_string_nz (pc)); | |
1400 | ||
1401 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1402 | } |
1403 | ||
1404 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1405 | ||
1406 | static int | |
1407 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1408 | struct frame_info *this_frame, | |
1409 | void **this_cache) | |
1410 | { | |
0b722aec MM |
1411 | const struct btrace_function *bfun; |
1412 | struct btrace_frame_cache *cache; | |
cecac1ab | 1413 | struct thread_info *tp; |
0b722aec | 1414 | struct frame_info *next; |
cecac1ab MM |
1415 | |
1416 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1417 | tp = find_thread_ptid (inferior_ptid); | |
1418 | gdb_assert (tp != NULL); | |
1419 | ||
0b722aec MM |
1420 | bfun = NULL; |
1421 | next = get_next_frame (this_frame); | |
1422 | if (next == NULL) | |
1423 | { | |
1424 | const struct btrace_insn_iterator *replay; | |
1425 | ||
1426 | replay = tp->btrace.replay; | |
1427 | if (replay != NULL) | |
1428 | bfun = replay->function; | |
1429 | } | |
1430 | else | |
1431 | { | |
1432 | const struct btrace_function *callee; | |
1433 | ||
1434 | callee = btrace_get_frame_function (next); | |
1435 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1436 | bfun = callee->up; | |
1437 | } | |
1438 | ||
1439 | if (bfun == NULL) | |
1440 | return 0; | |
1441 | ||
1442 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1443 | btrace_get_bfun_name (bfun), bfun->level); | |
1444 | ||
1445 | /* This is our frame. Initialize the frame cache. */ | |
1446 | cache = bfcache_new (this_frame); | |
1447 | cache->tp = tp; | |
1448 | cache->bfun = bfun; | |
1449 | ||
1450 | *this_cache = cache; | |
1451 | return 1; | |
1452 | } | |
1453 | ||
1454 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1455 | ||
1456 | static int | |
1457 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1458 | struct frame_info *this_frame, | |
1459 | void **this_cache) | |
1460 | { | |
1461 | const struct btrace_function *bfun, *callee; | |
1462 | struct btrace_frame_cache *cache; | |
1463 | struct frame_info *next; | |
1464 | ||
1465 | next = get_next_frame (this_frame); | |
1466 | if (next == NULL) | |
1467 | return 0; | |
1468 | ||
1469 | callee = btrace_get_frame_function (next); | |
1470 | if (callee == NULL) | |
1471 | return 0; | |
1472 | ||
1473 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1474 | return 0; | |
1475 | ||
1476 | bfun = callee->up; | |
1477 | if (bfun == NULL) | |
1478 | return 0; | |
1479 | ||
1480 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1481 | btrace_get_bfun_name (bfun), bfun->level); | |
1482 | ||
1483 | /* This is our frame. Initialize the frame cache. */ | |
1484 | cache = bfcache_new (this_frame); | |
1485 | cache->tp = find_thread_ptid (inferior_ptid); | |
1486 | cache->bfun = bfun; | |
1487 | ||
1488 | *this_cache = cache; | |
1489 | return 1; | |
1490 | } | |
1491 | ||
1492 | static void | |
1493 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1494 | { | |
1495 | struct btrace_frame_cache *cache; | |
1496 | void **slot; | |
1497 | ||
1498 | cache = this_cache; | |
1499 | ||
1500 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1501 | gdb_assert (slot != NULL); | |
1502 | ||
1503 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1504 | } |
1505 | ||
1506 | /* btrace recording does not store previous memory content, neither the stack | |
1507 | frames content. Any unwinding would return errorneous results as the stack | |
1508 | contents no longer matches the changed PC value restored from history. | |
1509 | Therefore this unwinder reports any possibly unwound registers as | |
1510 | <unavailable>. */ | |
1511 | ||
0b722aec | 1512 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1513 | { |
1514 | NORMAL_FRAME, | |
1515 | record_btrace_frame_unwind_stop_reason, | |
1516 | record_btrace_frame_this_id, | |
1517 | record_btrace_frame_prev_register, | |
1518 | NULL, | |
0b722aec MM |
1519 | record_btrace_frame_sniffer, |
1520 | record_btrace_frame_dealloc_cache | |
1521 | }; | |
1522 | ||
1523 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1524 | { | |
1525 | TAILCALL_FRAME, | |
1526 | record_btrace_frame_unwind_stop_reason, | |
1527 | record_btrace_frame_this_id, | |
1528 | record_btrace_frame_prev_register, | |
1529 | NULL, | |
1530 | record_btrace_tailcall_frame_sniffer, | |
1531 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1532 | }; |
b2f4cfde | 1533 | |
ac01945b TT |
1534 | /* Implement the to_get_unwinder method. */ |
1535 | ||
1536 | static const struct frame_unwind * | |
1537 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1538 | { | |
1539 | return &record_btrace_frame_unwind; | |
1540 | } | |
1541 | ||
1542 | /* Implement the to_get_tailcall_unwinder method. */ | |
1543 | ||
1544 | static const struct frame_unwind * | |
1545 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1546 | { | |
1547 | return &record_btrace_tailcall_frame_unwind; | |
1548 | } | |
1549 | ||
52834460 MM |
1550 | /* Indicate that TP should be resumed according to FLAG. */ |
1551 | ||
1552 | static void | |
1553 | record_btrace_resume_thread (struct thread_info *tp, | |
1554 | enum btrace_thread_flag flag) | |
1555 | { | |
1556 | struct btrace_thread_info *btinfo; | |
1557 | ||
1558 | DEBUG ("resuming %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flag); | |
1559 | ||
1560 | btinfo = &tp->btrace; | |
1561 | ||
1562 | if ((btinfo->flags & BTHR_MOVE) != 0) | |
1563 | error (_("Thread already moving.")); | |
1564 | ||
1565 | /* Fetch the latest branch trace. */ | |
1566 | btrace_fetch (tp); | |
1567 | ||
1568 | btinfo->flags |= flag; | |
1569 | } | |
1570 | ||
1571 | /* Find the thread to resume given a PTID. */ | |
1572 | ||
1573 | static struct thread_info * | |
1574 | record_btrace_find_resume_thread (ptid_t ptid) | |
1575 | { | |
1576 | struct thread_info *tp; | |
1577 | ||
1578 | /* When asked to resume everything, we pick the current thread. */ | |
1579 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1580 | ptid = inferior_ptid; | |
1581 | ||
1582 | return find_thread_ptid (ptid); | |
1583 | } | |
1584 | ||
1585 | /* Start replaying a thread. */ | |
1586 | ||
1587 | static struct btrace_insn_iterator * | |
1588 | record_btrace_start_replaying (struct thread_info *tp) | |
1589 | { | |
1590 | volatile struct gdb_exception except; | |
1591 | struct btrace_insn_iterator *replay; | |
1592 | struct btrace_thread_info *btinfo; | |
1593 | int executing; | |
1594 | ||
1595 | btinfo = &tp->btrace; | |
1596 | replay = NULL; | |
1597 | ||
1598 | /* We can't start replaying without trace. */ | |
1599 | if (btinfo->begin == NULL) | |
1600 | return NULL; | |
1601 | ||
1602 | /* Clear the executing flag to allow changes to the current frame. | |
1603 | We are not actually running, yet. We just started a reverse execution | |
1604 | command or a record goto command. | |
1605 | For the latter, EXECUTING is false and this has no effect. | |
1606 | For the former, EXECUTING is true and we're in to_wait, about to | |
1607 | move the thread. Since we need to recompute the stack, we temporarily | |
1608 | set EXECUTING to flase. */ | |
1609 | executing = is_executing (tp->ptid); | |
1610 | set_executing (tp->ptid, 0); | |
1611 | ||
1612 | /* GDB stores the current frame_id when stepping in order to detects steps | |
1613 | into subroutines. | |
1614 | Since frames are computed differently when we're replaying, we need to | |
1615 | recompute those stored frames and fix them up so we can still detect | |
1616 | subroutines after we started replaying. */ | |
1617 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1618 | { | |
1619 | struct frame_info *frame; | |
1620 | struct frame_id frame_id; | |
1621 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1622 | ||
1623 | /* The current frame without replaying - computed via normal unwind. */ | |
1624 | frame = get_current_frame (); | |
1625 | frame_id = get_frame_id (frame); | |
1626 | ||
1627 | /* Check if we need to update any stepping-related frame id's. */ | |
1628 | upd_step_frame_id = frame_id_eq (frame_id, | |
1629 | tp->control.step_frame_id); | |
1630 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1631 | tp->control.step_stack_frame_id); | |
1632 | ||
1633 | /* We start replaying at the end of the branch trace. This corresponds | |
1634 | to the current instruction. */ | |
1635 | replay = xmalloc (sizeof (*replay)); | |
1636 | btrace_insn_end (replay, btinfo); | |
1637 | ||
31fd9caa MM |
1638 | /* Skip gaps at the end of the trace. */ |
1639 | while (btrace_insn_get (replay) == NULL) | |
1640 | { | |
1641 | unsigned int steps; | |
1642 | ||
1643 | steps = btrace_insn_prev (replay, 1); | |
1644 | if (steps == 0) | |
1645 | error (_("No trace.")); | |
1646 | } | |
1647 | ||
52834460 MM |
1648 | /* We're not replaying, yet. */ |
1649 | gdb_assert (btinfo->replay == NULL); | |
1650 | btinfo->replay = replay; | |
1651 | ||
1652 | /* Make sure we're not using any stale registers. */ | |
1653 | registers_changed_ptid (tp->ptid); | |
1654 | ||
1655 | /* The current frame with replaying - computed via btrace unwind. */ | |
1656 | frame = get_current_frame (); | |
1657 | frame_id = get_frame_id (frame); | |
1658 | ||
1659 | /* Replace stepping related frames where necessary. */ | |
1660 | if (upd_step_frame_id) | |
1661 | tp->control.step_frame_id = frame_id; | |
1662 | if (upd_step_stack_frame_id) | |
1663 | tp->control.step_stack_frame_id = frame_id; | |
1664 | } | |
1665 | ||
1666 | /* Restore the previous execution state. */ | |
1667 | set_executing (tp->ptid, executing); | |
1668 | ||
1669 | if (except.reason < 0) | |
1670 | { | |
1671 | xfree (btinfo->replay); | |
1672 | btinfo->replay = NULL; | |
1673 | ||
1674 | registers_changed_ptid (tp->ptid); | |
1675 | ||
1676 | throw_exception (except); | |
1677 | } | |
1678 | ||
1679 | return replay; | |
1680 | } | |
1681 | ||
1682 | /* Stop replaying a thread. */ | |
1683 | ||
1684 | static void | |
1685 | record_btrace_stop_replaying (struct thread_info *tp) | |
1686 | { | |
1687 | struct btrace_thread_info *btinfo; | |
1688 | ||
1689 | btinfo = &tp->btrace; | |
1690 | ||
1691 | xfree (btinfo->replay); | |
1692 | btinfo->replay = NULL; | |
1693 | ||
1694 | /* Make sure we're not leaving any stale registers. */ | |
1695 | registers_changed_ptid (tp->ptid); | |
1696 | } | |
1697 | ||
b2f4cfde MM |
1698 | /* The to_resume method of target record-btrace. */ |
1699 | ||
1700 | static void | |
1701 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1702 | enum gdb_signal signal) | |
1703 | { | |
52834460 MM |
1704 | struct thread_info *tp, *other; |
1705 | enum btrace_thread_flag flag; | |
1706 | ||
1707 | DEBUG ("resume %s: %s", target_pid_to_str (ptid), step ? "step" : "cont"); | |
1708 | ||
70ad5bff MM |
1709 | /* Store the execution direction of the last resume. */ |
1710 | record_btrace_resume_exec_dir = execution_direction; | |
1711 | ||
52834460 MM |
1712 | tp = record_btrace_find_resume_thread (ptid); |
1713 | if (tp == NULL) | |
1714 | error (_("Cannot find thread to resume.")); | |
1715 | ||
1716 | /* Stop replaying other threads if the thread to resume is not replaying. */ | |
1717 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
034f788c | 1718 | ALL_NON_EXITED_THREADS (other) |
52834460 MM |
1719 | record_btrace_stop_replaying (other); |
1720 | ||
b2f4cfde | 1721 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 1722 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 1723 | { |
e75fdfca TT |
1724 | ops = ops->beneath; |
1725 | return ops->to_resume (ops, ptid, step, signal); | |
b2f4cfde MM |
1726 | } |
1727 | ||
52834460 MM |
1728 | /* Compute the btrace thread flag for the requested move. */ |
1729 | if (step == 0) | |
1730 | flag = execution_direction == EXEC_REVERSE ? BTHR_RCONT : BTHR_CONT; | |
1731 | else | |
1732 | flag = execution_direction == EXEC_REVERSE ? BTHR_RSTEP : BTHR_STEP; | |
1733 | ||
1734 | /* At the moment, we only move a single thread. We could also move | |
1735 | all threads in parallel by single-stepping each resumed thread | |
1736 | until the first runs into an event. | |
1737 | When we do that, we would want to continue all other threads. | |
1738 | For now, just resume one thread to not confuse to_wait. */ | |
1739 | record_btrace_resume_thread (tp, flag); | |
1740 | ||
1741 | /* We just indicate the resume intent here. The actual stepping happens in | |
1742 | record_btrace_wait below. */ | |
70ad5bff MM |
1743 | |
1744 | /* Async support. */ | |
1745 | if (target_can_async_p ()) | |
1746 | { | |
1747 | target_async (inferior_event_handler, 0); | |
1748 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
1749 | } | |
52834460 MM |
1750 | } |
1751 | ||
1752 | /* Find a thread to move. */ | |
1753 | ||
1754 | static struct thread_info * | |
1755 | record_btrace_find_thread_to_move (ptid_t ptid) | |
1756 | { | |
1757 | struct thread_info *tp; | |
1758 | ||
1759 | /* First check the parameter thread. */ | |
1760 | tp = find_thread_ptid (ptid); | |
1761 | if (tp != NULL && (tp->btrace.flags & BTHR_MOVE) != 0) | |
1762 | return tp; | |
1763 | ||
1764 | /* Otherwise, find one other thread that has been resumed. */ | |
034f788c | 1765 | ALL_NON_EXITED_THREADS (tp) |
52834460 MM |
1766 | if ((tp->btrace.flags & BTHR_MOVE) != 0) |
1767 | return tp; | |
1768 | ||
1769 | return NULL; | |
1770 | } | |
1771 | ||
1772 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1773 | ||
1774 | static struct target_waitstatus | |
1775 | btrace_step_no_history (void) | |
1776 | { | |
1777 | struct target_waitstatus status; | |
1778 | ||
1779 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1780 | ||
1781 | return status; | |
1782 | } | |
1783 | ||
1784 | /* Return a target_waitstatus indicating that a step finished. */ | |
1785 | ||
1786 | static struct target_waitstatus | |
1787 | btrace_step_stopped (void) | |
1788 | { | |
1789 | struct target_waitstatus status; | |
1790 | ||
1791 | status.kind = TARGET_WAITKIND_STOPPED; | |
1792 | status.value.sig = GDB_SIGNAL_TRAP; | |
1793 | ||
1794 | return status; | |
1795 | } | |
1796 | ||
1797 | /* Clear the record histories. */ | |
1798 | ||
1799 | static void | |
1800 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
1801 | { | |
1802 | xfree (btinfo->insn_history); | |
1803 | xfree (btinfo->call_history); | |
1804 | ||
1805 | btinfo->insn_history = NULL; | |
1806 | btinfo->call_history = NULL; | |
1807 | } | |
1808 | ||
1809 | /* Step a single thread. */ | |
1810 | ||
1811 | static struct target_waitstatus | |
1812 | record_btrace_step_thread (struct thread_info *tp) | |
1813 | { | |
1814 | struct btrace_insn_iterator *replay, end; | |
1815 | struct btrace_thread_info *btinfo; | |
1816 | struct address_space *aspace; | |
1817 | struct inferior *inf; | |
1818 | enum btrace_thread_flag flags; | |
1819 | unsigned int steps; | |
1820 | ||
e59fa00f MM |
1821 | /* We can't step without an execution history. */ |
1822 | if (btrace_is_empty (tp)) | |
1823 | return btrace_step_no_history (); | |
1824 | ||
52834460 MM |
1825 | btinfo = &tp->btrace; |
1826 | replay = btinfo->replay; | |
1827 | ||
1828 | flags = btinfo->flags & BTHR_MOVE; | |
1829 | btinfo->flags &= ~BTHR_MOVE; | |
1830 | ||
1831 | DEBUG ("stepping %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flags); | |
1832 | ||
1833 | switch (flags) | |
1834 | { | |
1835 | default: | |
1836 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
1837 | ||
1838 | case BTHR_STEP: | |
1839 | /* We're done if we're not replaying. */ | |
1840 | if (replay == NULL) | |
1841 | return btrace_step_no_history (); | |
1842 | ||
31fd9caa MM |
1843 | /* Skip gaps during replay. */ |
1844 | do | |
1845 | { | |
1846 | steps = btrace_insn_next (replay, 1); | |
1847 | if (steps == 0) | |
1848 | { | |
1849 | record_btrace_stop_replaying (tp); | |
1850 | return btrace_step_no_history (); | |
1851 | } | |
1852 | } | |
1853 | while (btrace_insn_get (replay) == NULL); | |
52834460 MM |
1854 | |
1855 | /* Determine the end of the instruction trace. */ | |
1856 | btrace_insn_end (&end, btinfo); | |
1857 | ||
1858 | /* We stop replaying if we reached the end of the trace. */ | |
1859 | if (btrace_insn_cmp (replay, &end) == 0) | |
1860 | record_btrace_stop_replaying (tp); | |
1861 | ||
1862 | return btrace_step_stopped (); | |
1863 | ||
1864 | case BTHR_RSTEP: | |
1865 | /* Start replaying if we're not already doing so. */ | |
1866 | if (replay == NULL) | |
1867 | replay = record_btrace_start_replaying (tp); | |
1868 | ||
31fd9caa MM |
1869 | /* If we can't step any further, we reached the end of the history. |
1870 | Skip gaps during replay. */ | |
1871 | do | |
1872 | { | |
1873 | steps = btrace_insn_prev (replay, 1); | |
1874 | if (steps == 0) | |
1875 | return btrace_step_no_history (); | |
1876 | ||
1877 | } | |
1878 | while (btrace_insn_get (replay) == NULL); | |
52834460 MM |
1879 | |
1880 | return btrace_step_stopped (); | |
1881 | ||
1882 | case BTHR_CONT: | |
1883 | /* We're done if we're not replaying. */ | |
1884 | if (replay == NULL) | |
1885 | return btrace_step_no_history (); | |
1886 | ||
c9657e70 | 1887 | inf = find_inferior_ptid (tp->ptid); |
52834460 MM |
1888 | aspace = inf->aspace; |
1889 | ||
1890 | /* Determine the end of the instruction trace. */ | |
1891 | btrace_insn_end (&end, btinfo); | |
1892 | ||
1893 | for (;;) | |
1894 | { | |
1895 | const struct btrace_insn *insn; | |
1896 | ||
31fd9caa MM |
1897 | /* Skip gaps during replay. */ |
1898 | do | |
1899 | { | |
1900 | steps = btrace_insn_next (replay, 1); | |
1901 | if (steps == 0) | |
1902 | { | |
1903 | record_btrace_stop_replaying (tp); | |
1904 | return btrace_step_no_history (); | |
1905 | } | |
1906 | ||
1907 | insn = btrace_insn_get (replay); | |
1908 | } | |
1909 | while (insn == NULL); | |
52834460 MM |
1910 | |
1911 | /* We stop replaying if we reached the end of the trace. */ | |
1912 | if (btrace_insn_cmp (replay, &end) == 0) | |
1913 | { | |
1914 | record_btrace_stop_replaying (tp); | |
1915 | return btrace_step_no_history (); | |
1916 | } | |
1917 | ||
52834460 MM |
1918 | DEBUG ("stepping %d (%s) ... %s", tp->num, |
1919 | target_pid_to_str (tp->ptid), | |
1920 | core_addr_to_string_nz (insn->pc)); | |
1921 | ||
1922 | if (breakpoint_here_p (aspace, insn->pc)) | |
1923 | return btrace_step_stopped (); | |
1924 | } | |
1925 | ||
1926 | case BTHR_RCONT: | |
1927 | /* Start replaying if we're not already doing so. */ | |
1928 | if (replay == NULL) | |
1929 | replay = record_btrace_start_replaying (tp); | |
1930 | ||
c9657e70 | 1931 | inf = find_inferior_ptid (tp->ptid); |
52834460 MM |
1932 | aspace = inf->aspace; |
1933 | ||
1934 | for (;;) | |
1935 | { | |
1936 | const struct btrace_insn *insn; | |
1937 | ||
31fd9caa MM |
1938 | /* If we can't step any further, we reached the end of the history. |
1939 | Skip gaps during replay. */ | |
1940 | do | |
1941 | { | |
1942 | steps = btrace_insn_prev (replay, 1); | |
1943 | if (steps == 0) | |
1944 | return btrace_step_no_history (); | |
52834460 | 1945 | |
31fd9caa MM |
1946 | insn = btrace_insn_get (replay); |
1947 | } | |
1948 | while (insn == NULL); | |
52834460 MM |
1949 | |
1950 | DEBUG ("reverse-stepping %d (%s) ... %s", tp->num, | |
1951 | target_pid_to_str (tp->ptid), | |
1952 | core_addr_to_string_nz (insn->pc)); | |
1953 | ||
1954 | if (breakpoint_here_p (aspace, insn->pc)) | |
1955 | return btrace_step_stopped (); | |
1956 | } | |
1957 | } | |
b2f4cfde MM |
1958 | } |
1959 | ||
1960 | /* The to_wait method of target record-btrace. */ | |
1961 | ||
1962 | static ptid_t | |
1963 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
1964 | struct target_waitstatus *status, int options) | |
1965 | { | |
52834460 MM |
1966 | struct thread_info *tp, *other; |
1967 | ||
1968 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
1969 | ||
b2f4cfde | 1970 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 1971 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 1972 | { |
e75fdfca TT |
1973 | ops = ops->beneath; |
1974 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
1975 | } |
1976 | ||
52834460 MM |
1977 | /* Let's find a thread to move. */ |
1978 | tp = record_btrace_find_thread_to_move (ptid); | |
1979 | if (tp == NULL) | |
1980 | { | |
1981 | DEBUG ("wait %s: no thread", target_pid_to_str (ptid)); | |
1982 | ||
1983 | status->kind = TARGET_WAITKIND_IGNORE; | |
1984 | return minus_one_ptid; | |
1985 | } | |
1986 | ||
1987 | /* We only move a single thread. We're not able to correlate threads. */ | |
1988 | *status = record_btrace_step_thread (tp); | |
1989 | ||
1990 | /* Stop all other threads. */ | |
1991 | if (!non_stop) | |
034f788c | 1992 | ALL_NON_EXITED_THREADS (other) |
52834460 MM |
1993 | other->btrace.flags &= ~BTHR_MOVE; |
1994 | ||
1995 | /* Start record histories anew from the current position. */ | |
1996 | record_btrace_clear_histories (&tp->btrace); | |
1997 | ||
1998 | /* We moved the replay position but did not update registers. */ | |
1999 | registers_changed_ptid (tp->ptid); | |
2000 | ||
2001 | return tp->ptid; | |
2002 | } | |
2003 | ||
2004 | /* The to_can_execute_reverse method of target record-btrace. */ | |
2005 | ||
2006 | static int | |
19db3e69 | 2007 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2008 | { |
2009 | return 1; | |
2010 | } | |
2011 | ||
2012 | /* The to_decr_pc_after_break method of target record-btrace. */ | |
2013 | ||
2014 | static CORE_ADDR | |
2015 | record_btrace_decr_pc_after_break (struct target_ops *ops, | |
2016 | struct gdbarch *gdbarch) | |
2017 | { | |
2018 | /* When replaying, we do not actually execute the breakpoint instruction | |
2019 | so there is no need to adjust the PC after hitting a breakpoint. */ | |
1c63c994 | 2020 | if (record_btrace_is_replaying (ops)) |
52834460 MM |
2021 | return 0; |
2022 | ||
c0eca49f | 2023 | return ops->beneath->to_decr_pc_after_break (ops->beneath, gdbarch); |
b2f4cfde MM |
2024 | } |
2025 | ||
e8032dde | 2026 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2027 | |
2028 | static void | |
e8032dde | 2029 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2030 | { |
e8032dde | 2031 | /* We don't add or remove threads during replay. */ |
1c63c994 | 2032 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2033 | return; |
2034 | ||
2035 | /* Forward the request. */ | |
e75fdfca | 2036 | ops = ops->beneath; |
e8032dde | 2037 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2038 | } |
2039 | ||
2040 | /* The to_thread_alive method of target record-btrace. */ | |
2041 | ||
2042 | static int | |
2043 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2044 | { | |
2045 | /* We don't add or remove threads during replay. */ | |
1c63c994 | 2046 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2047 | return find_thread_ptid (ptid) != NULL; |
2048 | ||
2049 | /* Forward the request. */ | |
e75fdfca TT |
2050 | ops = ops->beneath; |
2051 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2052 | } |
2053 | ||
066ce621 MM |
2054 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2055 | is stopped. */ | |
2056 | ||
2057 | static void | |
2058 | record_btrace_set_replay (struct thread_info *tp, | |
2059 | const struct btrace_insn_iterator *it) | |
2060 | { | |
2061 | struct btrace_thread_info *btinfo; | |
2062 | ||
2063 | btinfo = &tp->btrace; | |
2064 | ||
2065 | if (it == NULL || it->function == NULL) | |
52834460 | 2066 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2067 | else |
2068 | { | |
2069 | if (btinfo->replay == NULL) | |
52834460 | 2070 | record_btrace_start_replaying (tp); |
066ce621 MM |
2071 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2072 | return; | |
2073 | ||
2074 | *btinfo->replay = *it; | |
52834460 | 2075 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2076 | } |
2077 | ||
52834460 MM |
2078 | /* Start anew from the new replay position. */ |
2079 | record_btrace_clear_histories (btinfo); | |
066ce621 MM |
2080 | } |
2081 | ||
2082 | /* The to_goto_record_begin method of target record-btrace. */ | |
2083 | ||
2084 | static void | |
08475817 | 2085 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2086 | { |
2087 | struct thread_info *tp; | |
2088 | struct btrace_insn_iterator begin; | |
2089 | ||
2090 | tp = require_btrace_thread (); | |
2091 | ||
2092 | btrace_insn_begin (&begin, &tp->btrace); | |
2093 | record_btrace_set_replay (tp, &begin); | |
2094 | ||
2095 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2096 | } | |
2097 | ||
2098 | /* The to_goto_record_end method of target record-btrace. */ | |
2099 | ||
2100 | static void | |
307a1b91 | 2101 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2102 | { |
2103 | struct thread_info *tp; | |
2104 | ||
2105 | tp = require_btrace_thread (); | |
2106 | ||
2107 | record_btrace_set_replay (tp, NULL); | |
2108 | ||
2109 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2110 | } | |
2111 | ||
2112 | /* The to_goto_record method of target record-btrace. */ | |
2113 | ||
2114 | static void | |
606183ac | 2115 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2116 | { |
2117 | struct thread_info *tp; | |
2118 | struct btrace_insn_iterator it; | |
2119 | unsigned int number; | |
2120 | int found; | |
2121 | ||
2122 | number = insn; | |
2123 | ||
2124 | /* Check for wrap-arounds. */ | |
2125 | if (number != insn) | |
2126 | error (_("Instruction number out of range.")); | |
2127 | ||
2128 | tp = require_btrace_thread (); | |
2129 | ||
2130 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2131 | if (found == 0) | |
2132 | error (_("No such instruction.")); | |
2133 | ||
2134 | record_btrace_set_replay (tp, &it); | |
2135 | ||
2136 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
2137 | } | |
2138 | ||
70ad5bff MM |
2139 | /* The to_execution_direction target method. */ |
2140 | ||
2141 | static enum exec_direction_kind | |
2142 | record_btrace_execution_direction (struct target_ops *self) | |
2143 | { | |
2144 | return record_btrace_resume_exec_dir; | |
2145 | } | |
2146 | ||
aef92902 MM |
2147 | /* The to_prepare_to_generate_core target method. */ |
2148 | ||
2149 | static void | |
2150 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2151 | { | |
2152 | record_btrace_generating_corefile = 1; | |
2153 | } | |
2154 | ||
2155 | /* The to_done_generating_core target method. */ | |
2156 | ||
2157 | static void | |
2158 | record_btrace_done_generating_core (struct target_ops *self) | |
2159 | { | |
2160 | record_btrace_generating_corefile = 0; | |
2161 | } | |
2162 | ||
afedecd3 MM |
2163 | /* Initialize the record-btrace target ops. */ |
2164 | ||
2165 | static void | |
2166 | init_record_btrace_ops (void) | |
2167 | { | |
2168 | struct target_ops *ops; | |
2169 | ||
2170 | ops = &record_btrace_ops; | |
2171 | ops->to_shortname = "record-btrace"; | |
2172 | ops->to_longname = "Branch tracing target"; | |
2173 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2174 | ops->to_open = record_btrace_open; | |
2175 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2176 | ops->to_async = record_btrace_async; |
afedecd3 MM |
2177 | ops->to_detach = record_detach; |
2178 | ops->to_disconnect = record_disconnect; | |
2179 | ops->to_mourn_inferior = record_mourn_inferior; | |
2180 | ops->to_kill = record_kill; | |
afedecd3 MM |
2181 | ops->to_stop_recording = record_btrace_stop_recording; |
2182 | ops->to_info_record = record_btrace_info; | |
2183 | ops->to_insn_history = record_btrace_insn_history; | |
2184 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2185 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2186 | ops->to_call_history = record_btrace_call_history; | |
2187 | ops->to_call_history_from = record_btrace_call_history_from; | |
2188 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2189 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
2190 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2191 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2192 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2193 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2194 | ops->to_store_registers = record_btrace_store_registers; | |
2195 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2196 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2197 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2198 | ops->to_resume = record_btrace_resume; |
2199 | ops->to_wait = record_btrace_wait; | |
e8032dde | 2200 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2201 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2202 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2203 | ops->to_goto_record_end = record_btrace_goto_end; | |
2204 | ops->to_goto_record = record_btrace_goto; | |
52834460 MM |
2205 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
2206 | ops->to_decr_pc_after_break = record_btrace_decr_pc_after_break; | |
70ad5bff | 2207 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2208 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2209 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2210 | ops->to_stratum = record_stratum; |
2211 | ops->to_magic = OPS_MAGIC; | |
2212 | } | |
2213 | ||
f4abbc16 MM |
2214 | /* Start recording in BTS format. */ |
2215 | ||
2216 | static void | |
2217 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2218 | { | |
2219 | volatile struct gdb_exception exception; | |
2220 | ||
2221 | if (args != NULL && *args != 0) | |
2222 | error (_("Invalid argument.")); | |
2223 | ||
2224 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2225 | ||
2226 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
2227 | execute_command ("target record-btrace", from_tty); | |
2228 | ||
2229 | if (exception.error != 0) | |
2230 | { | |
2231 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2232 | throw_exception (exception); | |
2233 | } | |
2234 | } | |
2235 | ||
afedecd3 MM |
2236 | /* Alias for "target record". */ |
2237 | ||
2238 | static void | |
2239 | cmd_record_btrace_start (char *args, int from_tty) | |
2240 | { | |
f4abbc16 MM |
2241 | volatile struct gdb_exception exception; |
2242 | ||
afedecd3 MM |
2243 | if (args != NULL && *args != 0) |
2244 | error (_("Invalid argument.")); | |
2245 | ||
f4abbc16 MM |
2246 | record_btrace_conf.format = BTRACE_FORMAT_BTS; |
2247 | ||
2248 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
2249 | execute_command ("target record-btrace", from_tty); | |
2250 | ||
2251 | if (exception.error == 0) | |
2252 | return; | |
2253 | ||
2254 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2255 | throw_exception (exception); | |
afedecd3 MM |
2256 | } |
2257 | ||
67b5c0c1 MM |
2258 | /* The "set record btrace" command. */ |
2259 | ||
2260 | static void | |
2261 | cmd_set_record_btrace (char *args, int from_tty) | |
2262 | { | |
2263 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2264 | } | |
2265 | ||
2266 | /* The "show record btrace" command. */ | |
2267 | ||
2268 | static void | |
2269 | cmd_show_record_btrace (char *args, int from_tty) | |
2270 | { | |
2271 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2272 | } | |
2273 | ||
2274 | /* The "show record btrace replay-memory-access" command. */ | |
2275 | ||
2276 | static void | |
2277 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2278 | struct cmd_list_element *c, const char *value) | |
2279 | { | |
2280 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2281 | replay_memory_access); | |
2282 | } | |
2283 | ||
d33501a5 MM |
2284 | /* The "set record btrace bts" command. */ |
2285 | ||
2286 | static void | |
2287 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
2288 | { | |
2289 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
2290 | "by an apporpriate subcommand.\n")); | |
2291 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", | |
2292 | all_commands, gdb_stdout); | |
2293 | } | |
2294 | ||
2295 | /* The "show record btrace bts" command. */ | |
2296 | ||
2297 | static void | |
2298 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
2299 | { | |
2300 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
2301 | } | |
2302 | ||
afedecd3 MM |
2303 | void _initialize_record_btrace (void); |
2304 | ||
2305 | /* Initialize btrace commands. */ | |
2306 | ||
2307 | void | |
2308 | _initialize_record_btrace (void) | |
2309 | { | |
f4abbc16 MM |
2310 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
2311 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
2312 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
2313 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
2314 | ||
f4abbc16 MM |
2315 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
2316 | _("\ | |
2317 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
2318 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
2319 | This format may not be available on all processors."), | |
2320 | &record_btrace_cmdlist); | |
2321 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
2322 | ||
67b5c0c1 MM |
2323 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
2324 | _("Set record options"), &set_record_btrace_cmdlist, | |
2325 | "set record btrace ", 0, &set_record_cmdlist); | |
2326 | ||
2327 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
2328 | _("Show record options"), &show_record_btrace_cmdlist, | |
2329 | "show record btrace ", 0, &show_record_cmdlist); | |
2330 | ||
2331 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
2332 | replay_memory_access_types, &replay_memory_access, _("\ | |
2333 | Set what memory accesses are allowed during replay."), _("\ | |
2334 | Show what memory accesses are allowed during replay."), | |
2335 | _("Default is READ-ONLY.\n\n\ | |
2336 | The btrace record target does not trace data.\n\ | |
2337 | The memory therefore corresponds to the live target and not \ | |
2338 | to the current replay position.\n\n\ | |
2339 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
2340 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
2341 | replay."), | |
2342 | NULL, cmd_show_replay_memory_access, | |
2343 | &set_record_btrace_cmdlist, | |
2344 | &show_record_btrace_cmdlist); | |
2345 | ||
d33501a5 MM |
2346 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
2347 | _("Set record btrace bts options"), | |
2348 | &set_record_btrace_bts_cmdlist, | |
2349 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
2350 | ||
2351 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
2352 | _("Show record btrace bts options"), | |
2353 | &show_record_btrace_bts_cmdlist, | |
2354 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
2355 | ||
2356 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2357 | &record_btrace_conf.bts.size, | |
2358 | _("Set the record/replay bts buffer size."), | |
2359 | _("Show the record/replay bts buffer size."), _("\ | |
2360 | When starting recording request a trace buffer of this size. \ | |
2361 | The actual buffer size may differ from the requested size. \ | |
2362 | Use \"info record\" to see the actual buffer size.\n\n\ | |
2363 | Bigger buffers allow longer recording but also take more time to process \ | |
2364 | the recorded execution trace.\n\n\ | |
2365 | The trace buffer size may not be changed while recording."), NULL, NULL, | |
2366 | &set_record_btrace_bts_cmdlist, | |
2367 | &show_record_btrace_bts_cmdlist); | |
2368 | ||
afedecd3 MM |
2369 | init_record_btrace_ops (); |
2370 | add_target (&record_btrace_ops); | |
0b722aec MM |
2371 | |
2372 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
2373 | xcalloc, xfree); | |
d33501a5 MM |
2374 | |
2375 | record_btrace_conf.bts.size = 64 * 1024; | |
afedecd3 | 2376 | } |