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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" | |
e3cfc1c7 | 40 | #include "vec.h" |
afedecd3 MM |
41 | |
42 | /* The target_ops of record-btrace. */ | |
43 | static struct target_ops record_btrace_ops; | |
44 | ||
45 | /* A new thread observer enabling branch tracing for the new thread. */ | |
46 | static struct observer *record_btrace_thread_observer; | |
47 | ||
67b5c0c1 MM |
48 | /* Memory access types used in set/show record btrace replay-memory-access. */ |
49 | static const char replay_memory_access_read_only[] = "read-only"; | |
50 | static const char replay_memory_access_read_write[] = "read-write"; | |
51 | static const char *const replay_memory_access_types[] = | |
52 | { | |
53 | replay_memory_access_read_only, | |
54 | replay_memory_access_read_write, | |
55 | NULL | |
56 | }; | |
57 | ||
58 | /* The currently allowed replay memory access type. */ | |
59 | static const char *replay_memory_access = replay_memory_access_read_only; | |
60 | ||
61 | /* Command lists for "set/show record btrace". */ | |
62 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
63 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
633785ff | 64 | |
70ad5bff MM |
65 | /* The execution direction of the last resume we got. See record-full.c. */ |
66 | static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD; | |
67 | ||
68 | /* The async event handler for reverse/replay execution. */ | |
69 | static struct async_event_handler *record_btrace_async_inferior_event_handler; | |
70 | ||
aef92902 MM |
71 | /* A flag indicating that we are currently generating a core file. */ |
72 | static int record_btrace_generating_corefile; | |
73 | ||
f4abbc16 MM |
74 | /* The current branch trace configuration. */ |
75 | static struct btrace_config record_btrace_conf; | |
76 | ||
77 | /* Command list for "record btrace". */ | |
78 | static struct cmd_list_element *record_btrace_cmdlist; | |
79 | ||
d33501a5 MM |
80 | /* Command lists for "set/show record btrace bts". */ |
81 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
82 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
83 | ||
b20a6524 MM |
84 | /* Command lists for "set/show record btrace pt". */ |
85 | static struct cmd_list_element *set_record_btrace_pt_cmdlist; | |
86 | static struct cmd_list_element *show_record_btrace_pt_cmdlist; | |
87 | ||
afedecd3 MM |
88 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
89 | ambiguities when used in if statements. */ | |
90 | ||
91 | #define DEBUG(msg, args...) \ | |
92 | do \ | |
93 | { \ | |
94 | if (record_debug != 0) \ | |
95 | fprintf_unfiltered (gdb_stdlog, \ | |
96 | "[record-btrace] " msg "\n", ##args); \ | |
97 | } \ | |
98 | while (0) | |
99 | ||
100 | ||
101 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 102 | thread_info. |
afedecd3 MM |
103 | |
104 | Throws an error if there is no thread or no trace. This function never | |
105 | returns NULL. */ | |
106 | ||
066ce621 MM |
107 | static struct thread_info * |
108 | require_btrace_thread (void) | |
afedecd3 MM |
109 | { |
110 | struct thread_info *tp; | |
afedecd3 MM |
111 | |
112 | DEBUG ("require"); | |
113 | ||
114 | tp = find_thread_ptid (inferior_ptid); | |
115 | if (tp == NULL) | |
116 | error (_("No thread.")); | |
117 | ||
118 | btrace_fetch (tp); | |
119 | ||
6e07b1d2 | 120 | if (btrace_is_empty (tp)) |
afedecd3 MM |
121 | error (_("No trace.")); |
122 | ||
066ce621 MM |
123 | return tp; |
124 | } | |
125 | ||
126 | /* Update the branch trace for the current thread and return a pointer to its | |
127 | branch trace information struct. | |
128 | ||
129 | Throws an error if there is no thread or no trace. This function never | |
130 | returns NULL. */ | |
131 | ||
132 | static struct btrace_thread_info * | |
133 | require_btrace (void) | |
134 | { | |
135 | struct thread_info *tp; | |
136 | ||
137 | tp = require_btrace_thread (); | |
138 | ||
139 | return &tp->btrace; | |
afedecd3 MM |
140 | } |
141 | ||
142 | /* Enable branch tracing for one thread. Warn on errors. */ | |
143 | ||
144 | static void | |
145 | record_btrace_enable_warn (struct thread_info *tp) | |
146 | { | |
492d29ea PA |
147 | TRY |
148 | { | |
149 | btrace_enable (tp, &record_btrace_conf); | |
150 | } | |
151 | CATCH (error, RETURN_MASK_ERROR) | |
152 | { | |
153 | warning ("%s", error.message); | |
154 | } | |
155 | END_CATCH | |
afedecd3 MM |
156 | } |
157 | ||
158 | /* Callback function to disable branch tracing for one thread. */ | |
159 | ||
160 | static void | |
161 | record_btrace_disable_callback (void *arg) | |
162 | { | |
163 | struct thread_info *tp; | |
164 | ||
165 | tp = arg; | |
166 | ||
167 | btrace_disable (tp); | |
168 | } | |
169 | ||
170 | /* Enable automatic tracing of new threads. */ | |
171 | ||
172 | static void | |
173 | record_btrace_auto_enable (void) | |
174 | { | |
175 | DEBUG ("attach thread observer"); | |
176 | ||
177 | record_btrace_thread_observer | |
178 | = observer_attach_new_thread (record_btrace_enable_warn); | |
179 | } | |
180 | ||
181 | /* Disable automatic tracing of new threads. */ | |
182 | ||
183 | static void | |
184 | record_btrace_auto_disable (void) | |
185 | { | |
186 | /* The observer may have been detached, already. */ | |
187 | if (record_btrace_thread_observer == NULL) | |
188 | return; | |
189 | ||
190 | DEBUG ("detach thread observer"); | |
191 | ||
192 | observer_detach_new_thread (record_btrace_thread_observer); | |
193 | record_btrace_thread_observer = NULL; | |
194 | } | |
195 | ||
70ad5bff MM |
196 | /* The record-btrace async event handler function. */ |
197 | ||
198 | static void | |
199 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
200 | { | |
201 | inferior_event_handler (INF_REG_EVENT, NULL); | |
202 | } | |
203 | ||
afedecd3 MM |
204 | /* The to_open method of target record-btrace. */ |
205 | ||
206 | static void | |
014f9477 | 207 | record_btrace_open (const char *args, int from_tty) |
afedecd3 MM |
208 | { |
209 | struct cleanup *disable_chain; | |
210 | struct thread_info *tp; | |
211 | ||
212 | DEBUG ("open"); | |
213 | ||
8213266a | 214 | record_preopen (); |
afedecd3 MM |
215 | |
216 | if (!target_has_execution) | |
217 | error (_("The program is not being run.")); | |
218 | ||
52834460 MM |
219 | if (non_stop) |
220 | error (_("Record btrace can't debug inferior in non-stop mode.")); | |
221 | ||
afedecd3 MM |
222 | gdb_assert (record_btrace_thread_observer == NULL); |
223 | ||
224 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 225 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
226 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->num)) |
227 | { | |
f4abbc16 | 228 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
229 | |
230 | make_cleanup (record_btrace_disable_callback, tp); | |
231 | } | |
232 | ||
233 | record_btrace_auto_enable (); | |
234 | ||
235 | push_target (&record_btrace_ops); | |
236 | ||
70ad5bff MM |
237 | record_btrace_async_inferior_event_handler |
238 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
239 | NULL); | |
aef92902 | 240 | record_btrace_generating_corefile = 0; |
70ad5bff | 241 | |
afedecd3 MM |
242 | observer_notify_record_changed (current_inferior (), 1); |
243 | ||
244 | discard_cleanups (disable_chain); | |
245 | } | |
246 | ||
247 | /* The to_stop_recording method of target record-btrace. */ | |
248 | ||
249 | static void | |
c6cd7c02 | 250 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
251 | { |
252 | struct thread_info *tp; | |
253 | ||
254 | DEBUG ("stop recording"); | |
255 | ||
256 | record_btrace_auto_disable (); | |
257 | ||
034f788c | 258 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
259 | if (tp->btrace.target != NULL) |
260 | btrace_disable (tp); | |
261 | } | |
262 | ||
263 | /* The to_close method of target record-btrace. */ | |
264 | ||
265 | static void | |
de90e03d | 266 | record_btrace_close (struct target_ops *self) |
afedecd3 | 267 | { |
568e808b MM |
268 | struct thread_info *tp; |
269 | ||
70ad5bff MM |
270 | if (record_btrace_async_inferior_event_handler != NULL) |
271 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
272 | ||
99c819ee MM |
273 | /* Make sure automatic recording gets disabled even if we did not stop |
274 | recording before closing the record-btrace target. */ | |
275 | record_btrace_auto_disable (); | |
276 | ||
568e808b MM |
277 | /* We should have already stopped recording. |
278 | Tear down btrace in case we have not. */ | |
034f788c | 279 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 280 | btrace_teardown (tp); |
afedecd3 MM |
281 | } |
282 | ||
b7d2e916 PA |
283 | /* The to_async method of target record-btrace. */ |
284 | ||
285 | static void | |
6a3753b3 | 286 | record_btrace_async (struct target_ops *ops, int enable) |
b7d2e916 | 287 | { |
6a3753b3 | 288 | if (enable) |
b7d2e916 PA |
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 | ||
6a3753b3 | 293 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
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 | ||
b20a6524 MM |
340 | /* Print an Intel(R) Processor Trace configuration. */ |
341 | ||
342 | static void | |
343 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
344 | { | |
345 | const char *suffix; | |
346 | unsigned int size; | |
347 | ||
348 | size = conf->size; | |
349 | if (size > 0) | |
350 | { | |
351 | suffix = record_btrace_adjust_size (&size); | |
352 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
353 | } | |
354 | } | |
355 | ||
d33501a5 MM |
356 | /* Print a branch tracing configuration. */ |
357 | ||
358 | static void | |
359 | record_btrace_print_conf (const struct btrace_config *conf) | |
360 | { | |
361 | printf_unfiltered (_("Recording format: %s.\n"), | |
362 | btrace_format_string (conf->format)); | |
363 | ||
364 | switch (conf->format) | |
365 | { | |
366 | case BTRACE_FORMAT_NONE: | |
367 | return; | |
368 | ||
369 | case BTRACE_FORMAT_BTS: | |
370 | record_btrace_print_bts_conf (&conf->bts); | |
371 | return; | |
b20a6524 MM |
372 | |
373 | case BTRACE_FORMAT_PT: | |
374 | record_btrace_print_pt_conf (&conf->pt); | |
375 | return; | |
d33501a5 MM |
376 | } |
377 | ||
378 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
379 | } | |
380 | ||
afedecd3 MM |
381 | /* The to_info_record method of target record-btrace. */ |
382 | ||
383 | static void | |
630d6a4a | 384 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
385 | { |
386 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 387 | const struct btrace_config *conf; |
afedecd3 | 388 | struct thread_info *tp; |
31fd9caa | 389 | unsigned int insns, calls, gaps; |
afedecd3 MM |
390 | |
391 | DEBUG ("info"); | |
392 | ||
393 | tp = find_thread_ptid (inferior_ptid); | |
394 | if (tp == NULL) | |
395 | error (_("No thread.")); | |
396 | ||
f4abbc16 MM |
397 | btinfo = &tp->btrace; |
398 | ||
399 | conf = btrace_conf (btinfo); | |
400 | if (conf != NULL) | |
d33501a5 | 401 | record_btrace_print_conf (conf); |
f4abbc16 | 402 | |
afedecd3 MM |
403 | btrace_fetch (tp); |
404 | ||
23a7fe75 MM |
405 | insns = 0; |
406 | calls = 0; | |
31fd9caa | 407 | gaps = 0; |
23a7fe75 | 408 | |
6e07b1d2 | 409 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
410 | { |
411 | struct btrace_call_iterator call; | |
412 | struct btrace_insn_iterator insn; | |
413 | ||
414 | btrace_call_end (&call, btinfo); | |
415 | btrace_call_prev (&call, 1); | |
5de9129b | 416 | calls = btrace_call_number (&call); |
23a7fe75 MM |
417 | |
418 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 419 | |
5de9129b | 420 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
421 | if (insns != 0) |
422 | { | |
423 | /* The last instruction does not really belong to the trace. */ | |
424 | insns -= 1; | |
425 | } | |
426 | else | |
427 | { | |
428 | unsigned int steps; | |
429 | ||
430 | /* Skip gaps at the end. */ | |
431 | do | |
432 | { | |
433 | steps = btrace_insn_prev (&insn, 1); | |
434 | if (steps == 0) | |
435 | break; | |
436 | ||
437 | insns = btrace_insn_number (&insn); | |
438 | } | |
439 | while (insns == 0); | |
440 | } | |
441 | ||
442 | gaps = btinfo->ngaps; | |
23a7fe75 | 443 | } |
afedecd3 | 444 | |
31fd9caa MM |
445 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
446 | "for thread %d (%s).\n"), insns, calls, gaps, | |
447 | tp->num, target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
448 | |
449 | if (btrace_is_replaying (tp)) | |
450 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
451 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
452 | } |
453 | ||
31fd9caa MM |
454 | /* Print a decode error. */ |
455 | ||
456 | static void | |
457 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
458 | enum btrace_format format) | |
459 | { | |
460 | const char *errstr; | |
461 | int is_error; | |
462 | ||
463 | errstr = _("unknown"); | |
464 | is_error = 1; | |
465 | ||
466 | switch (format) | |
467 | { | |
468 | default: | |
469 | break; | |
470 | ||
471 | case BTRACE_FORMAT_BTS: | |
472 | switch (errcode) | |
473 | { | |
474 | default: | |
475 | break; | |
476 | ||
477 | case BDE_BTS_OVERFLOW: | |
478 | errstr = _("instruction overflow"); | |
479 | break; | |
480 | ||
481 | case BDE_BTS_INSN_SIZE: | |
482 | errstr = _("unknown instruction"); | |
483 | break; | |
484 | } | |
485 | break; | |
b20a6524 MM |
486 | |
487 | #if defined (HAVE_LIBIPT) | |
488 | case BTRACE_FORMAT_PT: | |
489 | switch (errcode) | |
490 | { | |
491 | case BDE_PT_USER_QUIT: | |
492 | is_error = 0; | |
493 | errstr = _("trace decode cancelled"); | |
494 | break; | |
495 | ||
496 | case BDE_PT_DISABLED: | |
497 | is_error = 0; | |
498 | errstr = _("disabled"); | |
499 | break; | |
500 | ||
501 | case BDE_PT_OVERFLOW: | |
502 | is_error = 0; | |
503 | errstr = _("overflow"); | |
504 | break; | |
505 | ||
506 | default: | |
507 | if (errcode < 0) | |
508 | errstr = pt_errstr (pt_errcode (errcode)); | |
509 | break; | |
510 | } | |
511 | break; | |
512 | #endif /* defined (HAVE_LIBIPT) */ | |
31fd9caa MM |
513 | } |
514 | ||
515 | ui_out_text (uiout, _("[")); | |
516 | if (is_error) | |
517 | { | |
518 | ui_out_text (uiout, _("decode error (")); | |
519 | ui_out_field_int (uiout, "errcode", errcode); | |
520 | ui_out_text (uiout, _("): ")); | |
521 | } | |
522 | ui_out_text (uiout, errstr); | |
523 | ui_out_text (uiout, _("]\n")); | |
524 | } | |
525 | ||
afedecd3 MM |
526 | /* Print an unsigned int. */ |
527 | ||
528 | static void | |
529 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
530 | { | |
531 | ui_out_field_fmt (uiout, fld, "%u", val); | |
532 | } | |
533 | ||
534 | /* Disassemble a section of the recorded instruction trace. */ | |
535 | ||
536 | static void | |
23a7fe75 | 537 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 538 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
539 | const struct btrace_insn_iterator *begin, |
540 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 MM |
541 | { |
542 | struct gdbarch *gdbarch; | |
23a7fe75 | 543 | struct btrace_insn_iterator it; |
afedecd3 | 544 | |
23a7fe75 MM |
545 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
546 | btrace_insn_number (end)); | |
afedecd3 MM |
547 | |
548 | gdbarch = target_gdbarch (); | |
549 | ||
23a7fe75 | 550 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 551 | { |
23a7fe75 MM |
552 | const struct btrace_insn *insn; |
553 | ||
554 | insn = btrace_insn_get (&it); | |
555 | ||
31fd9caa MM |
556 | /* A NULL instruction indicates a gap in the trace. */ |
557 | if (insn == NULL) | |
558 | { | |
559 | const struct btrace_config *conf; | |
560 | ||
561 | conf = btrace_conf (btinfo); | |
afedecd3 | 562 | |
31fd9caa MM |
563 | /* We have trace so we must have a configuration. */ |
564 | gdb_assert (conf != NULL); | |
565 | ||
566 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
567 | conf->format); | |
568 | } | |
569 | else | |
570 | { | |
da8c46d2 MM |
571 | char prefix[4]; |
572 | ||
573 | /* We may add a speculation prefix later. We use the same space | |
574 | that is used for the pc prefix. */ | |
575 | if ((flags & DISASSEMBLY_OMIT_PC) == 0) | |
576 | strncpy (prefix, pc_prefix (insn->pc), 3); | |
577 | else | |
578 | { | |
579 | prefix[0] = ' '; | |
580 | prefix[1] = ' '; | |
581 | prefix[2] = ' '; | |
582 | } | |
583 | prefix[3] = 0; | |
584 | ||
31fd9caa MM |
585 | /* Print the instruction index. */ |
586 | ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); | |
587 | ui_out_text (uiout, "\t"); | |
588 | ||
da8c46d2 MM |
589 | /* Indicate speculative execution by a leading '?'. */ |
590 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) | |
591 | prefix[0] = '?'; | |
592 | ||
593 | /* Print the prefix; we tell gdb_disassembly below to omit it. */ | |
594 | ui_out_field_fmt (uiout, "prefix", "%s", prefix); | |
595 | ||
31fd9caa MM |
596 | /* Disassembly with '/m' flag may not produce the expected result. |
597 | See PR gdb/11833. */ | |
da8c46d2 MM |
598 | gdb_disassembly (gdbarch, uiout, NULL, flags | DISASSEMBLY_OMIT_PC, |
599 | 1, insn->pc, insn->pc + 1); | |
31fd9caa | 600 | } |
afedecd3 MM |
601 | } |
602 | } | |
603 | ||
604 | /* The to_insn_history method of target record-btrace. */ | |
605 | ||
606 | static void | |
7a6c5609 | 607 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
608 | { |
609 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
610 | struct btrace_insn_history *history; |
611 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
612 | struct cleanup *uiout_cleanup; |
613 | struct ui_out *uiout; | |
23a7fe75 | 614 | unsigned int context, covered; |
afedecd3 MM |
615 | |
616 | uiout = current_uiout; | |
617 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
618 | "insn history"); | |
afedecd3 | 619 | context = abs (size); |
afedecd3 MM |
620 | if (context == 0) |
621 | error (_("Bad record instruction-history-size.")); | |
622 | ||
23a7fe75 MM |
623 | btinfo = require_btrace (); |
624 | history = btinfo->insn_history; | |
625 | if (history == NULL) | |
afedecd3 | 626 | { |
07bbe694 | 627 | struct btrace_insn_iterator *replay; |
afedecd3 | 628 | |
23a7fe75 | 629 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 630 | |
07bbe694 MM |
631 | /* If we're replaying, we start at the replay position. Otherwise, we |
632 | start at the tail of the trace. */ | |
633 | replay = btinfo->replay; | |
634 | if (replay != NULL) | |
635 | begin = *replay; | |
636 | else | |
637 | btrace_insn_end (&begin, btinfo); | |
638 | ||
639 | /* We start from here and expand in the requested direction. Then we | |
640 | expand in the other direction, as well, to fill up any remaining | |
641 | context. */ | |
642 | end = begin; | |
643 | if (size < 0) | |
644 | { | |
645 | /* We want the current position covered, as well. */ | |
646 | covered = btrace_insn_next (&end, 1); | |
647 | covered += btrace_insn_prev (&begin, context - covered); | |
648 | covered += btrace_insn_next (&end, context - covered); | |
649 | } | |
650 | else | |
651 | { | |
652 | covered = btrace_insn_next (&end, context); | |
653 | covered += btrace_insn_prev (&begin, context - covered); | |
654 | } | |
afedecd3 MM |
655 | } |
656 | else | |
657 | { | |
23a7fe75 MM |
658 | begin = history->begin; |
659 | end = history->end; | |
afedecd3 | 660 | |
23a7fe75 MM |
661 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
662 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 663 | |
23a7fe75 MM |
664 | if (size < 0) |
665 | { | |
666 | end = begin; | |
667 | covered = btrace_insn_prev (&begin, context); | |
668 | } | |
669 | else | |
670 | { | |
671 | begin = end; | |
672 | covered = btrace_insn_next (&end, context); | |
673 | } | |
afedecd3 MM |
674 | } |
675 | ||
23a7fe75 | 676 | if (covered > 0) |
31fd9caa | 677 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
678 | else |
679 | { | |
680 | if (size < 0) | |
681 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
682 | else | |
683 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
684 | } | |
afedecd3 | 685 | |
23a7fe75 | 686 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
687 | do_cleanups (uiout_cleanup); |
688 | } | |
689 | ||
690 | /* The to_insn_history_range method of target record-btrace. */ | |
691 | ||
692 | static void | |
4e99c6b7 TT |
693 | record_btrace_insn_history_range (struct target_ops *self, |
694 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
695 | { |
696 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
697 | struct btrace_insn_history *history; |
698 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
699 | struct cleanup *uiout_cleanup; |
700 | struct ui_out *uiout; | |
23a7fe75 MM |
701 | unsigned int low, high; |
702 | int found; | |
afedecd3 MM |
703 | |
704 | uiout = current_uiout; | |
705 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
706 | "insn history"); | |
23a7fe75 MM |
707 | low = from; |
708 | high = to; | |
afedecd3 | 709 | |
23a7fe75 | 710 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
711 | |
712 | /* Check for wrap-arounds. */ | |
23a7fe75 | 713 | if (low != from || high != to) |
afedecd3 MM |
714 | error (_("Bad range.")); |
715 | ||
0688d04e | 716 | if (high < low) |
afedecd3 MM |
717 | error (_("Bad range.")); |
718 | ||
23a7fe75 | 719 | btinfo = require_btrace (); |
afedecd3 | 720 | |
23a7fe75 MM |
721 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
722 | if (found == 0) | |
723 | error (_("Range out of bounds.")); | |
afedecd3 | 724 | |
23a7fe75 MM |
725 | found = btrace_find_insn_by_number (&end, btinfo, high); |
726 | if (found == 0) | |
0688d04e MM |
727 | { |
728 | /* Silently truncate the range. */ | |
729 | btrace_insn_end (&end, btinfo); | |
730 | } | |
731 | else | |
732 | { | |
733 | /* We want both begin and end to be inclusive. */ | |
734 | btrace_insn_next (&end, 1); | |
735 | } | |
afedecd3 | 736 | |
31fd9caa | 737 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 738 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
739 | |
740 | do_cleanups (uiout_cleanup); | |
741 | } | |
742 | ||
743 | /* The to_insn_history_from method of target record-btrace. */ | |
744 | ||
745 | static void | |
9abc3ff3 TT |
746 | record_btrace_insn_history_from (struct target_ops *self, |
747 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
748 | { |
749 | ULONGEST begin, end, context; | |
750 | ||
751 | context = abs (size); | |
0688d04e MM |
752 | if (context == 0) |
753 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
754 | |
755 | if (size < 0) | |
756 | { | |
757 | end = from; | |
758 | ||
759 | if (from < context) | |
760 | begin = 0; | |
761 | else | |
0688d04e | 762 | begin = from - context + 1; |
afedecd3 MM |
763 | } |
764 | else | |
765 | { | |
766 | begin = from; | |
0688d04e | 767 | end = from + context - 1; |
afedecd3 MM |
768 | |
769 | /* Check for wrap-around. */ | |
770 | if (end < begin) | |
771 | end = ULONGEST_MAX; | |
772 | } | |
773 | ||
4e99c6b7 | 774 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
775 | } |
776 | ||
777 | /* Print the instruction number range for a function call history line. */ | |
778 | ||
779 | static void | |
23a7fe75 MM |
780 | btrace_call_history_insn_range (struct ui_out *uiout, |
781 | const struct btrace_function *bfun) | |
afedecd3 | 782 | { |
7acbe133 MM |
783 | unsigned int begin, end, size; |
784 | ||
785 | size = VEC_length (btrace_insn_s, bfun->insn); | |
786 | gdb_assert (size > 0); | |
afedecd3 | 787 | |
23a7fe75 | 788 | begin = bfun->insn_offset; |
7acbe133 | 789 | end = begin + size - 1; |
afedecd3 | 790 | |
23a7fe75 | 791 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 792 | ui_out_text (uiout, ","); |
23a7fe75 | 793 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
794 | } |
795 | ||
ce0dfbea MM |
796 | /* Compute the lowest and highest source line for the instructions in BFUN |
797 | and return them in PBEGIN and PEND. | |
798 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
799 | result from inlining or macro expansion. */ | |
800 | ||
801 | static void | |
802 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
803 | int *pbegin, int *pend) | |
804 | { | |
805 | struct btrace_insn *insn; | |
806 | struct symtab *symtab; | |
807 | struct symbol *sym; | |
808 | unsigned int idx; | |
809 | int begin, end; | |
810 | ||
811 | begin = INT_MAX; | |
812 | end = INT_MIN; | |
813 | ||
814 | sym = bfun->sym; | |
815 | if (sym == NULL) | |
816 | goto out; | |
817 | ||
818 | symtab = symbol_symtab (sym); | |
819 | ||
820 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
821 | { | |
822 | struct symtab_and_line sal; | |
823 | ||
824 | sal = find_pc_line (insn->pc, 0); | |
825 | if (sal.symtab != symtab || sal.line == 0) | |
826 | continue; | |
827 | ||
828 | begin = min (begin, sal.line); | |
829 | end = max (end, sal.line); | |
830 | } | |
831 | ||
832 | out: | |
833 | *pbegin = begin; | |
834 | *pend = end; | |
835 | } | |
836 | ||
afedecd3 MM |
837 | /* Print the source line information for a function call history line. */ |
838 | ||
839 | static void | |
23a7fe75 MM |
840 | btrace_call_history_src_line (struct ui_out *uiout, |
841 | const struct btrace_function *bfun) | |
afedecd3 MM |
842 | { |
843 | struct symbol *sym; | |
23a7fe75 | 844 | int begin, end; |
afedecd3 MM |
845 | |
846 | sym = bfun->sym; | |
847 | if (sym == NULL) | |
848 | return; | |
849 | ||
850 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 851 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 852 | |
ce0dfbea | 853 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 854 | if (end < begin) |
afedecd3 MM |
855 | return; |
856 | ||
857 | ui_out_text (uiout, ":"); | |
23a7fe75 | 858 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 859 | |
23a7fe75 | 860 | if (end == begin) |
afedecd3 MM |
861 | return; |
862 | ||
8710b709 | 863 | ui_out_text (uiout, ","); |
23a7fe75 | 864 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
865 | } |
866 | ||
0b722aec MM |
867 | /* Get the name of a branch trace function. */ |
868 | ||
869 | static const char * | |
870 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
871 | { | |
872 | struct minimal_symbol *msym; | |
873 | struct symbol *sym; | |
874 | ||
875 | if (bfun == NULL) | |
876 | return "??"; | |
877 | ||
878 | msym = bfun->msym; | |
879 | sym = bfun->sym; | |
880 | ||
881 | if (sym != NULL) | |
882 | return SYMBOL_PRINT_NAME (sym); | |
883 | else if (msym != NULL) | |
efd66ac6 | 884 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
885 | else |
886 | return "??"; | |
887 | } | |
888 | ||
afedecd3 MM |
889 | /* Disassemble a section of the recorded function trace. */ |
890 | ||
891 | static void | |
23a7fe75 | 892 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 893 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
894 | const struct btrace_call_iterator *begin, |
895 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
896 | enum record_print_flag flags) |
897 | { | |
23a7fe75 | 898 | struct btrace_call_iterator it; |
afedecd3 | 899 | |
23a7fe75 MM |
900 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
901 | btrace_call_number (end)); | |
afedecd3 | 902 | |
23a7fe75 | 903 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 904 | { |
23a7fe75 MM |
905 | const struct btrace_function *bfun; |
906 | struct minimal_symbol *msym; | |
907 | struct symbol *sym; | |
908 | ||
909 | bfun = btrace_call_get (&it); | |
23a7fe75 | 910 | sym = bfun->sym; |
0b722aec | 911 | msym = bfun->msym; |
23a7fe75 | 912 | |
afedecd3 | 913 | /* Print the function index. */ |
23a7fe75 | 914 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
915 | ui_out_text (uiout, "\t"); |
916 | ||
31fd9caa MM |
917 | /* Indicate gaps in the trace. */ |
918 | if (bfun->errcode != 0) | |
919 | { | |
920 | const struct btrace_config *conf; | |
921 | ||
922 | conf = btrace_conf (btinfo); | |
923 | ||
924 | /* We have trace so we must have a configuration. */ | |
925 | gdb_assert (conf != NULL); | |
926 | ||
927 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
928 | ||
929 | continue; | |
930 | } | |
931 | ||
8710b709 MM |
932 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
933 | { | |
934 | int level = bfun->level + btinfo->level, i; | |
935 | ||
936 | for (i = 0; i < level; ++i) | |
937 | ui_out_text (uiout, " "); | |
938 | } | |
939 | ||
940 | if (sym != NULL) | |
941 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
942 | else if (msym != NULL) | |
efd66ac6 | 943 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
944 | else if (!ui_out_is_mi_like_p (uiout)) |
945 | ui_out_field_string (uiout, "function", "??"); | |
946 | ||
1e038f67 | 947 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 948 | { |
8710b709 | 949 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 950 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
951 | } |
952 | ||
1e038f67 | 953 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 954 | { |
8710b709 | 955 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 956 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
957 | } |
958 | ||
afedecd3 MM |
959 | ui_out_text (uiout, "\n"); |
960 | } | |
961 | } | |
962 | ||
963 | /* The to_call_history method of target record-btrace. */ | |
964 | ||
965 | static void | |
5df2fcba | 966 | record_btrace_call_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
967 | { |
968 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
969 | struct btrace_call_history *history; |
970 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
971 | struct cleanup *uiout_cleanup; |
972 | struct ui_out *uiout; | |
23a7fe75 | 973 | unsigned int context, covered; |
afedecd3 MM |
974 | |
975 | uiout = current_uiout; | |
976 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
977 | "insn history"); | |
afedecd3 | 978 | context = abs (size); |
afedecd3 MM |
979 | if (context == 0) |
980 | error (_("Bad record function-call-history-size.")); | |
981 | ||
23a7fe75 MM |
982 | btinfo = require_btrace (); |
983 | history = btinfo->call_history; | |
984 | if (history == NULL) | |
afedecd3 | 985 | { |
07bbe694 | 986 | struct btrace_insn_iterator *replay; |
afedecd3 | 987 | |
23a7fe75 | 988 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 989 | |
07bbe694 MM |
990 | /* If we're replaying, we start at the replay position. Otherwise, we |
991 | start at the tail of the trace. */ | |
992 | replay = btinfo->replay; | |
993 | if (replay != NULL) | |
994 | { | |
995 | begin.function = replay->function; | |
996 | begin.btinfo = btinfo; | |
997 | } | |
998 | else | |
999 | btrace_call_end (&begin, btinfo); | |
1000 | ||
1001 | /* We start from here and expand in the requested direction. Then we | |
1002 | expand in the other direction, as well, to fill up any remaining | |
1003 | context. */ | |
1004 | end = begin; | |
1005 | if (size < 0) | |
1006 | { | |
1007 | /* We want the current position covered, as well. */ | |
1008 | covered = btrace_call_next (&end, 1); | |
1009 | covered += btrace_call_prev (&begin, context - covered); | |
1010 | covered += btrace_call_next (&end, context - covered); | |
1011 | } | |
1012 | else | |
1013 | { | |
1014 | covered = btrace_call_next (&end, context); | |
1015 | covered += btrace_call_prev (&begin, context- covered); | |
1016 | } | |
afedecd3 MM |
1017 | } |
1018 | else | |
1019 | { | |
23a7fe75 MM |
1020 | begin = history->begin; |
1021 | end = history->end; | |
afedecd3 | 1022 | |
23a7fe75 MM |
1023 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
1024 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 1025 | |
23a7fe75 MM |
1026 | if (size < 0) |
1027 | { | |
1028 | end = begin; | |
1029 | covered = btrace_call_prev (&begin, context); | |
1030 | } | |
1031 | else | |
1032 | { | |
1033 | begin = end; | |
1034 | covered = btrace_call_next (&end, context); | |
1035 | } | |
afedecd3 MM |
1036 | } |
1037 | ||
23a7fe75 | 1038 | if (covered > 0) |
8710b709 | 1039 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1040 | else |
1041 | { | |
1042 | if (size < 0) | |
1043 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
1044 | else | |
1045 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
1046 | } | |
afedecd3 | 1047 | |
23a7fe75 | 1048 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1049 | do_cleanups (uiout_cleanup); |
1050 | } | |
1051 | ||
1052 | /* The to_call_history_range method of target record-btrace. */ | |
1053 | ||
1054 | static void | |
f0d960ea TT |
1055 | record_btrace_call_history_range (struct target_ops *self, |
1056 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
1057 | { |
1058 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1059 | struct btrace_call_history *history; |
1060 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1061 | struct cleanup *uiout_cleanup; |
1062 | struct ui_out *uiout; | |
23a7fe75 MM |
1063 | unsigned int low, high; |
1064 | int found; | |
afedecd3 MM |
1065 | |
1066 | uiout = current_uiout; | |
1067 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1068 | "func history"); | |
23a7fe75 MM |
1069 | low = from; |
1070 | high = to; | |
afedecd3 | 1071 | |
23a7fe75 | 1072 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
1073 | |
1074 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1075 | if (low != from || high != to) |
afedecd3 MM |
1076 | error (_("Bad range.")); |
1077 | ||
0688d04e | 1078 | if (high < low) |
afedecd3 MM |
1079 | error (_("Bad range.")); |
1080 | ||
23a7fe75 | 1081 | btinfo = require_btrace (); |
afedecd3 | 1082 | |
23a7fe75 MM |
1083 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1084 | if (found == 0) | |
1085 | error (_("Range out of bounds.")); | |
afedecd3 | 1086 | |
23a7fe75 MM |
1087 | found = btrace_find_call_by_number (&end, btinfo, high); |
1088 | if (found == 0) | |
0688d04e MM |
1089 | { |
1090 | /* Silently truncate the range. */ | |
1091 | btrace_call_end (&end, btinfo); | |
1092 | } | |
1093 | else | |
1094 | { | |
1095 | /* We want both begin and end to be inclusive. */ | |
1096 | btrace_call_next (&end, 1); | |
1097 | } | |
afedecd3 | 1098 | |
8710b709 | 1099 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1100 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1101 | |
1102 | do_cleanups (uiout_cleanup); | |
1103 | } | |
1104 | ||
1105 | /* The to_call_history_from method of target record-btrace. */ | |
1106 | ||
1107 | static void | |
ec0aea04 TT |
1108 | record_btrace_call_history_from (struct target_ops *self, |
1109 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
1110 | { |
1111 | ULONGEST begin, end, context; | |
1112 | ||
1113 | context = abs (size); | |
0688d04e MM |
1114 | if (context == 0) |
1115 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1116 | |
1117 | if (size < 0) | |
1118 | { | |
1119 | end = from; | |
1120 | ||
1121 | if (from < context) | |
1122 | begin = 0; | |
1123 | else | |
0688d04e | 1124 | begin = from - context + 1; |
afedecd3 MM |
1125 | } |
1126 | else | |
1127 | { | |
1128 | begin = from; | |
0688d04e | 1129 | end = from + context - 1; |
afedecd3 MM |
1130 | |
1131 | /* Check for wrap-around. */ | |
1132 | if (end < begin) | |
1133 | end = ULONGEST_MAX; | |
1134 | } | |
1135 | ||
f0d960ea | 1136 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1137 | } |
1138 | ||
07bbe694 MM |
1139 | /* The to_record_is_replaying method of target record-btrace. */ |
1140 | ||
1141 | static int | |
1c63c994 | 1142 | record_btrace_is_replaying (struct target_ops *self) |
07bbe694 MM |
1143 | { |
1144 | struct thread_info *tp; | |
1145 | ||
034f788c | 1146 | ALL_NON_EXITED_THREADS (tp) |
07bbe694 MM |
1147 | if (btrace_is_replaying (tp)) |
1148 | return 1; | |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
633785ff MM |
1153 | /* The to_xfer_partial method of target record-btrace. */ |
1154 | ||
9b409511 | 1155 | static enum target_xfer_status |
633785ff MM |
1156 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1157 | const char *annex, gdb_byte *readbuf, | |
1158 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1159 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1160 | { |
1161 | struct target_ops *t; | |
1162 | ||
1163 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1164 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1165 | && !record_btrace_generating_corefile |
67b5c0c1 | 1166 | && record_btrace_is_replaying (ops)) |
633785ff MM |
1167 | { |
1168 | switch (object) | |
1169 | { | |
1170 | case TARGET_OBJECT_MEMORY: | |
1171 | { | |
1172 | struct target_section *section; | |
1173 | ||
1174 | /* We do not allow writing memory in general. */ | |
1175 | if (writebuf != NULL) | |
9b409511 YQ |
1176 | { |
1177 | *xfered_len = len; | |
bc113b4e | 1178 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1179 | } |
633785ff MM |
1180 | |
1181 | /* We allow reading readonly memory. */ | |
1182 | section = target_section_by_addr (ops, offset); | |
1183 | if (section != NULL) | |
1184 | { | |
1185 | /* Check if the section we found is readonly. */ | |
1186 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1187 | section->the_bfd_section) | |
1188 | & SEC_READONLY) != 0) | |
1189 | { | |
1190 | /* Truncate the request to fit into this section. */ | |
1191 | len = min (len, section->endaddr - offset); | |
1192 | break; | |
1193 | } | |
1194 | } | |
1195 | ||
9b409511 | 1196 | *xfered_len = len; |
bc113b4e | 1197 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1198 | } |
1199 | } | |
1200 | } | |
1201 | ||
1202 | /* Forward the request. */ | |
e75fdfca TT |
1203 | ops = ops->beneath; |
1204 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1205 | offset, len, xfered_len); | |
633785ff MM |
1206 | } |
1207 | ||
1208 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1209 | ||
1210 | static int | |
1211 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1212 | struct gdbarch *gdbarch, | |
1213 | struct bp_target_info *bp_tgt) | |
1214 | { | |
67b5c0c1 MM |
1215 | const char *old; |
1216 | int ret; | |
633785ff MM |
1217 | |
1218 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1219 | duration of this function. */ | |
67b5c0c1 MM |
1220 | old = replay_memory_access; |
1221 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1222 | |
1223 | ret = 0; | |
492d29ea PA |
1224 | TRY |
1225 | { | |
1226 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1227 | } | |
492d29ea PA |
1228 | CATCH (except, RETURN_MASK_ALL) |
1229 | { | |
6c63c96a | 1230 | replay_memory_access = old; |
492d29ea PA |
1231 | throw_exception (except); |
1232 | } | |
1233 | END_CATCH | |
6c63c96a | 1234 | replay_memory_access = old; |
633785ff MM |
1235 | |
1236 | return ret; | |
1237 | } | |
1238 | ||
1239 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1240 | ||
1241 | static int | |
1242 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1243 | struct gdbarch *gdbarch, | |
1244 | struct bp_target_info *bp_tgt) | |
1245 | { | |
67b5c0c1 MM |
1246 | const char *old; |
1247 | int ret; | |
633785ff MM |
1248 | |
1249 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1250 | duration of this function. */ | |
67b5c0c1 MM |
1251 | old = replay_memory_access; |
1252 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1253 | |
1254 | ret = 0; | |
492d29ea PA |
1255 | TRY |
1256 | { | |
1257 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1258 | } | |
492d29ea PA |
1259 | CATCH (except, RETURN_MASK_ALL) |
1260 | { | |
6c63c96a | 1261 | replay_memory_access = old; |
492d29ea PA |
1262 | throw_exception (except); |
1263 | } | |
1264 | END_CATCH | |
6c63c96a | 1265 | replay_memory_access = old; |
633785ff MM |
1266 | |
1267 | return ret; | |
1268 | } | |
1269 | ||
1f3ef581 MM |
1270 | /* The to_fetch_registers method of target record-btrace. */ |
1271 | ||
1272 | static void | |
1273 | record_btrace_fetch_registers (struct target_ops *ops, | |
1274 | struct regcache *regcache, int regno) | |
1275 | { | |
1276 | struct btrace_insn_iterator *replay; | |
1277 | struct thread_info *tp; | |
1278 | ||
1279 | tp = find_thread_ptid (inferior_ptid); | |
1280 | gdb_assert (tp != NULL); | |
1281 | ||
1282 | replay = tp->btrace.replay; | |
aef92902 | 1283 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1284 | { |
1285 | const struct btrace_insn *insn; | |
1286 | struct gdbarch *gdbarch; | |
1287 | int pcreg; | |
1288 | ||
1289 | gdbarch = get_regcache_arch (regcache); | |
1290 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1291 | if (pcreg < 0) | |
1292 | return; | |
1293 | ||
1294 | /* We can only provide the PC register. */ | |
1295 | if (regno >= 0 && regno != pcreg) | |
1296 | return; | |
1297 | ||
1298 | insn = btrace_insn_get (replay); | |
1299 | gdb_assert (insn != NULL); | |
1300 | ||
1301 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1302 | } | |
1303 | else | |
1304 | { | |
e75fdfca | 1305 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1306 | |
e75fdfca | 1307 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1308 | } |
1309 | } | |
1310 | ||
1311 | /* The to_store_registers method of target record-btrace. */ | |
1312 | ||
1313 | static void | |
1314 | record_btrace_store_registers (struct target_ops *ops, | |
1315 | struct regcache *regcache, int regno) | |
1316 | { | |
1317 | struct target_ops *t; | |
1318 | ||
aef92902 | 1319 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1320 | error (_("This record target does not allow writing registers.")); |
1321 | ||
1322 | gdb_assert (may_write_registers != 0); | |
1323 | ||
e75fdfca TT |
1324 | t = ops->beneath; |
1325 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1326 | } |
1327 | ||
1328 | /* The to_prepare_to_store method of target record-btrace. */ | |
1329 | ||
1330 | static void | |
1331 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1332 | struct regcache *regcache) | |
1333 | { | |
1334 | struct target_ops *t; | |
1335 | ||
aef92902 | 1336 | if (!record_btrace_generating_corefile && record_btrace_is_replaying (ops)) |
1f3ef581 MM |
1337 | return; |
1338 | ||
e75fdfca TT |
1339 | t = ops->beneath; |
1340 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1341 | } |
1342 | ||
0b722aec MM |
1343 | /* The branch trace frame cache. */ |
1344 | ||
1345 | struct btrace_frame_cache | |
1346 | { | |
1347 | /* The thread. */ | |
1348 | struct thread_info *tp; | |
1349 | ||
1350 | /* The frame info. */ | |
1351 | struct frame_info *frame; | |
1352 | ||
1353 | /* The branch trace function segment. */ | |
1354 | const struct btrace_function *bfun; | |
1355 | }; | |
1356 | ||
1357 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1358 | ||
1359 | static htab_t bfcache; | |
1360 | ||
1361 | /* hash_f for htab_create_alloc of bfcache. */ | |
1362 | ||
1363 | static hashval_t | |
1364 | bfcache_hash (const void *arg) | |
1365 | { | |
1366 | const struct btrace_frame_cache *cache = arg; | |
1367 | ||
1368 | return htab_hash_pointer (cache->frame); | |
1369 | } | |
1370 | ||
1371 | /* eq_f for htab_create_alloc of bfcache. */ | |
1372 | ||
1373 | static int | |
1374 | bfcache_eq (const void *arg1, const void *arg2) | |
1375 | { | |
1376 | const struct btrace_frame_cache *cache1 = arg1; | |
1377 | const struct btrace_frame_cache *cache2 = arg2; | |
1378 | ||
1379 | return cache1->frame == cache2->frame; | |
1380 | } | |
1381 | ||
1382 | /* Create a new btrace frame cache. */ | |
1383 | ||
1384 | static struct btrace_frame_cache * | |
1385 | bfcache_new (struct frame_info *frame) | |
1386 | { | |
1387 | struct btrace_frame_cache *cache; | |
1388 | void **slot; | |
1389 | ||
1390 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1391 | cache->frame = frame; | |
1392 | ||
1393 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1394 | gdb_assert (*slot == NULL); | |
1395 | *slot = cache; | |
1396 | ||
1397 | return cache; | |
1398 | } | |
1399 | ||
1400 | /* Extract the branch trace function from a branch trace frame. */ | |
1401 | ||
1402 | static const struct btrace_function * | |
1403 | btrace_get_frame_function (struct frame_info *frame) | |
1404 | { | |
1405 | const struct btrace_frame_cache *cache; | |
1406 | const struct btrace_function *bfun; | |
1407 | struct btrace_frame_cache pattern; | |
1408 | void **slot; | |
1409 | ||
1410 | pattern.frame = frame; | |
1411 | ||
1412 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1413 | if (slot == NULL) | |
1414 | return NULL; | |
1415 | ||
1416 | cache = *slot; | |
1417 | return cache->bfun; | |
1418 | } | |
1419 | ||
cecac1ab MM |
1420 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1421 | ||
1422 | static enum unwind_stop_reason | |
1423 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1424 | void **this_cache) | |
1425 | { | |
0b722aec MM |
1426 | const struct btrace_frame_cache *cache; |
1427 | const struct btrace_function *bfun; | |
1428 | ||
1429 | cache = *this_cache; | |
1430 | bfun = cache->bfun; | |
1431 | gdb_assert (bfun != NULL); | |
1432 | ||
1433 | if (bfun->up == NULL) | |
1434 | return UNWIND_UNAVAILABLE; | |
1435 | ||
1436 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1437 | } |
1438 | ||
1439 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1440 | ||
1441 | static void | |
1442 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1443 | struct frame_id *this_id) | |
1444 | { | |
0b722aec MM |
1445 | const struct btrace_frame_cache *cache; |
1446 | const struct btrace_function *bfun; | |
1447 | CORE_ADDR code, special; | |
1448 | ||
1449 | cache = *this_cache; | |
1450 | ||
1451 | bfun = cache->bfun; | |
1452 | gdb_assert (bfun != NULL); | |
1453 | ||
1454 | while (bfun->segment.prev != NULL) | |
1455 | bfun = bfun->segment.prev; | |
1456 | ||
1457 | code = get_frame_func (this_frame); | |
1458 | special = bfun->number; | |
1459 | ||
1460 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1461 | ||
1462 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1463 | btrace_get_bfun_name (cache->bfun), | |
1464 | core_addr_to_string_nz (this_id->code_addr), | |
1465 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1466 | } |
1467 | ||
1468 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1469 | ||
1470 | static struct value * | |
1471 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1472 | void **this_cache, | |
1473 | int regnum) | |
1474 | { | |
0b722aec MM |
1475 | const struct btrace_frame_cache *cache; |
1476 | const struct btrace_function *bfun, *caller; | |
1477 | const struct btrace_insn *insn; | |
1478 | struct gdbarch *gdbarch; | |
1479 | CORE_ADDR pc; | |
1480 | int pcreg; | |
1481 | ||
1482 | gdbarch = get_frame_arch (this_frame); | |
1483 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1484 | if (pcreg < 0 || regnum != pcreg) | |
1485 | throw_error (NOT_AVAILABLE_ERROR, | |
1486 | _("Registers are not available in btrace record history")); | |
1487 | ||
1488 | cache = *this_cache; | |
1489 | bfun = cache->bfun; | |
1490 | gdb_assert (bfun != NULL); | |
1491 | ||
1492 | caller = bfun->up; | |
1493 | if (caller == NULL) | |
1494 | throw_error (NOT_AVAILABLE_ERROR, | |
1495 | _("No caller in btrace record history")); | |
1496 | ||
1497 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1498 | { | |
1499 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1500 | pc = insn->pc; | |
1501 | } | |
1502 | else | |
1503 | { | |
1504 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1505 | pc = insn->pc; | |
1506 | ||
1507 | pc += gdb_insn_length (gdbarch, pc); | |
1508 | } | |
1509 | ||
1510 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1511 | btrace_get_bfun_name (bfun), bfun->level, | |
1512 | core_addr_to_string_nz (pc)); | |
1513 | ||
1514 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1515 | } |
1516 | ||
1517 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1518 | ||
1519 | static int | |
1520 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1521 | struct frame_info *this_frame, | |
1522 | void **this_cache) | |
1523 | { | |
0b722aec MM |
1524 | const struct btrace_function *bfun; |
1525 | struct btrace_frame_cache *cache; | |
cecac1ab | 1526 | struct thread_info *tp; |
0b722aec | 1527 | struct frame_info *next; |
cecac1ab MM |
1528 | |
1529 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1530 | tp = find_thread_ptid (inferior_ptid); | |
1531 | gdb_assert (tp != NULL); | |
1532 | ||
0b722aec MM |
1533 | bfun = NULL; |
1534 | next = get_next_frame (this_frame); | |
1535 | if (next == NULL) | |
1536 | { | |
1537 | const struct btrace_insn_iterator *replay; | |
1538 | ||
1539 | replay = tp->btrace.replay; | |
1540 | if (replay != NULL) | |
1541 | bfun = replay->function; | |
1542 | } | |
1543 | else | |
1544 | { | |
1545 | const struct btrace_function *callee; | |
1546 | ||
1547 | callee = btrace_get_frame_function (next); | |
1548 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1549 | bfun = callee->up; | |
1550 | } | |
1551 | ||
1552 | if (bfun == NULL) | |
1553 | return 0; | |
1554 | ||
1555 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1556 | btrace_get_bfun_name (bfun), bfun->level); | |
1557 | ||
1558 | /* This is our frame. Initialize the frame cache. */ | |
1559 | cache = bfcache_new (this_frame); | |
1560 | cache->tp = tp; | |
1561 | cache->bfun = bfun; | |
1562 | ||
1563 | *this_cache = cache; | |
1564 | return 1; | |
1565 | } | |
1566 | ||
1567 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1568 | ||
1569 | static int | |
1570 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1571 | struct frame_info *this_frame, | |
1572 | void **this_cache) | |
1573 | { | |
1574 | const struct btrace_function *bfun, *callee; | |
1575 | struct btrace_frame_cache *cache; | |
1576 | struct frame_info *next; | |
1577 | ||
1578 | next = get_next_frame (this_frame); | |
1579 | if (next == NULL) | |
1580 | return 0; | |
1581 | ||
1582 | callee = btrace_get_frame_function (next); | |
1583 | if (callee == NULL) | |
1584 | return 0; | |
1585 | ||
1586 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1587 | return 0; | |
1588 | ||
1589 | bfun = callee->up; | |
1590 | if (bfun == NULL) | |
1591 | return 0; | |
1592 | ||
1593 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1594 | btrace_get_bfun_name (bfun), bfun->level); | |
1595 | ||
1596 | /* This is our frame. Initialize the frame cache. */ | |
1597 | cache = bfcache_new (this_frame); | |
1598 | cache->tp = find_thread_ptid (inferior_ptid); | |
1599 | cache->bfun = bfun; | |
1600 | ||
1601 | *this_cache = cache; | |
1602 | return 1; | |
1603 | } | |
1604 | ||
1605 | static void | |
1606 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1607 | { | |
1608 | struct btrace_frame_cache *cache; | |
1609 | void **slot; | |
1610 | ||
1611 | cache = this_cache; | |
1612 | ||
1613 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1614 | gdb_assert (slot != NULL); | |
1615 | ||
1616 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1617 | } |
1618 | ||
1619 | /* btrace recording does not store previous memory content, neither the stack | |
1620 | frames content. Any unwinding would return errorneous results as the stack | |
1621 | contents no longer matches the changed PC value restored from history. | |
1622 | Therefore this unwinder reports any possibly unwound registers as | |
1623 | <unavailable>. */ | |
1624 | ||
0b722aec | 1625 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1626 | { |
1627 | NORMAL_FRAME, | |
1628 | record_btrace_frame_unwind_stop_reason, | |
1629 | record_btrace_frame_this_id, | |
1630 | record_btrace_frame_prev_register, | |
1631 | NULL, | |
0b722aec MM |
1632 | record_btrace_frame_sniffer, |
1633 | record_btrace_frame_dealloc_cache | |
1634 | }; | |
1635 | ||
1636 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1637 | { | |
1638 | TAILCALL_FRAME, | |
1639 | record_btrace_frame_unwind_stop_reason, | |
1640 | record_btrace_frame_this_id, | |
1641 | record_btrace_frame_prev_register, | |
1642 | NULL, | |
1643 | record_btrace_tailcall_frame_sniffer, | |
1644 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1645 | }; |
b2f4cfde | 1646 | |
ac01945b TT |
1647 | /* Implement the to_get_unwinder method. */ |
1648 | ||
1649 | static const struct frame_unwind * | |
1650 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1651 | { | |
1652 | return &record_btrace_frame_unwind; | |
1653 | } | |
1654 | ||
1655 | /* Implement the to_get_tailcall_unwinder method. */ | |
1656 | ||
1657 | static const struct frame_unwind * | |
1658 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1659 | { | |
1660 | return &record_btrace_tailcall_frame_unwind; | |
1661 | } | |
1662 | ||
987e68b1 MM |
1663 | /* Return a human-readable string for FLAG. */ |
1664 | ||
1665 | static const char * | |
1666 | btrace_thread_flag_to_str (enum btrace_thread_flag flag) | |
1667 | { | |
1668 | switch (flag) | |
1669 | { | |
1670 | case BTHR_STEP: | |
1671 | return "step"; | |
1672 | ||
1673 | case BTHR_RSTEP: | |
1674 | return "reverse-step"; | |
1675 | ||
1676 | case BTHR_CONT: | |
1677 | return "cont"; | |
1678 | ||
1679 | case BTHR_RCONT: | |
1680 | return "reverse-cont"; | |
1681 | ||
1682 | case BTHR_STOP: | |
1683 | return "stop"; | |
1684 | } | |
1685 | ||
1686 | return "<invalid>"; | |
1687 | } | |
1688 | ||
52834460 MM |
1689 | /* Indicate that TP should be resumed according to FLAG. */ |
1690 | ||
1691 | static void | |
1692 | record_btrace_resume_thread (struct thread_info *tp, | |
1693 | enum btrace_thread_flag flag) | |
1694 | { | |
1695 | struct btrace_thread_info *btinfo; | |
1696 | ||
987e68b1 MM |
1697 | DEBUG ("resuming thread %d (%s): %x (%s)", tp->num, |
1698 | target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag)); | |
52834460 MM |
1699 | |
1700 | btinfo = &tp->btrace; | |
1701 | ||
52834460 MM |
1702 | /* Fetch the latest branch trace. */ |
1703 | btrace_fetch (tp); | |
1704 | ||
0ca912df MM |
1705 | /* A resume request overwrites a preceding resume or stop request. */ |
1706 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1707 | btinfo->flags |= flag; |
1708 | } | |
1709 | ||
ec71cc2f MM |
1710 | /* Get the current frame for TP. */ |
1711 | ||
1712 | static struct frame_info * | |
1713 | get_thread_current_frame (struct thread_info *tp) | |
1714 | { | |
1715 | struct frame_info *frame; | |
1716 | ptid_t old_inferior_ptid; | |
1717 | int executing; | |
1718 | ||
1719 | /* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */ | |
1720 | old_inferior_ptid = inferior_ptid; | |
1721 | inferior_ptid = tp->ptid; | |
1722 | ||
1723 | /* Clear the executing flag to allow changes to the current frame. | |
1724 | We are not actually running, yet. We just started a reverse execution | |
1725 | command or a record goto command. | |
1726 | For the latter, EXECUTING is false and this has no effect. | |
1727 | For the former, EXECUTING is true and we're in to_wait, about to | |
1728 | move the thread. Since we need to recompute the stack, we temporarily | |
1729 | set EXECUTING to flase. */ | |
1730 | executing = is_executing (inferior_ptid); | |
1731 | set_executing (inferior_ptid, 0); | |
1732 | ||
1733 | frame = NULL; | |
1734 | TRY | |
1735 | { | |
1736 | frame = get_current_frame (); | |
1737 | } | |
1738 | CATCH (except, RETURN_MASK_ALL) | |
1739 | { | |
1740 | /* Restore the previous execution state. */ | |
1741 | set_executing (inferior_ptid, executing); | |
1742 | ||
1743 | /* Restore the previous inferior_ptid. */ | |
1744 | inferior_ptid = old_inferior_ptid; | |
1745 | ||
1746 | throw_exception (except); | |
1747 | } | |
1748 | END_CATCH | |
1749 | ||
1750 | /* Restore the previous execution state. */ | |
1751 | set_executing (inferior_ptid, executing); | |
1752 | ||
1753 | /* Restore the previous inferior_ptid. */ | |
1754 | inferior_ptid = old_inferior_ptid; | |
1755 | ||
1756 | return frame; | |
1757 | } | |
1758 | ||
52834460 MM |
1759 | /* Start replaying a thread. */ |
1760 | ||
1761 | static struct btrace_insn_iterator * | |
1762 | record_btrace_start_replaying (struct thread_info *tp) | |
1763 | { | |
52834460 MM |
1764 | struct btrace_insn_iterator *replay; |
1765 | struct btrace_thread_info *btinfo; | |
52834460 MM |
1766 | |
1767 | btinfo = &tp->btrace; | |
1768 | replay = NULL; | |
1769 | ||
1770 | /* We can't start replaying without trace. */ | |
1771 | if (btinfo->begin == NULL) | |
1772 | return NULL; | |
1773 | ||
52834460 MM |
1774 | /* GDB stores the current frame_id when stepping in order to detects steps |
1775 | into subroutines. | |
1776 | Since frames are computed differently when we're replaying, we need to | |
1777 | recompute those stored frames and fix them up so we can still detect | |
1778 | subroutines after we started replaying. */ | |
492d29ea | 1779 | TRY |
52834460 MM |
1780 | { |
1781 | struct frame_info *frame; | |
1782 | struct frame_id frame_id; | |
1783 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1784 | ||
1785 | /* The current frame without replaying - computed via normal unwind. */ | |
ec71cc2f | 1786 | frame = get_thread_current_frame (tp); |
52834460 MM |
1787 | frame_id = get_frame_id (frame); |
1788 | ||
1789 | /* Check if we need to update any stepping-related frame id's. */ | |
1790 | upd_step_frame_id = frame_id_eq (frame_id, | |
1791 | tp->control.step_frame_id); | |
1792 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1793 | tp->control.step_stack_frame_id); | |
1794 | ||
1795 | /* We start replaying at the end of the branch trace. This corresponds | |
1796 | to the current instruction. */ | |
8d749320 | 1797 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
1798 | btrace_insn_end (replay, btinfo); |
1799 | ||
31fd9caa MM |
1800 | /* Skip gaps at the end of the trace. */ |
1801 | while (btrace_insn_get (replay) == NULL) | |
1802 | { | |
1803 | unsigned int steps; | |
1804 | ||
1805 | steps = btrace_insn_prev (replay, 1); | |
1806 | if (steps == 0) | |
1807 | error (_("No trace.")); | |
1808 | } | |
1809 | ||
52834460 MM |
1810 | /* We're not replaying, yet. */ |
1811 | gdb_assert (btinfo->replay == NULL); | |
1812 | btinfo->replay = replay; | |
1813 | ||
1814 | /* Make sure we're not using any stale registers. */ | |
1815 | registers_changed_ptid (tp->ptid); | |
1816 | ||
1817 | /* The current frame with replaying - computed via btrace unwind. */ | |
ec71cc2f | 1818 | frame = get_thread_current_frame (tp); |
52834460 MM |
1819 | frame_id = get_frame_id (frame); |
1820 | ||
1821 | /* Replace stepping related frames where necessary. */ | |
1822 | if (upd_step_frame_id) | |
1823 | tp->control.step_frame_id = frame_id; | |
1824 | if (upd_step_stack_frame_id) | |
1825 | tp->control.step_stack_frame_id = frame_id; | |
1826 | } | |
492d29ea | 1827 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
1828 | { |
1829 | xfree (btinfo->replay); | |
1830 | btinfo->replay = NULL; | |
1831 | ||
1832 | registers_changed_ptid (tp->ptid); | |
1833 | ||
1834 | throw_exception (except); | |
1835 | } | |
492d29ea | 1836 | END_CATCH |
52834460 MM |
1837 | |
1838 | return replay; | |
1839 | } | |
1840 | ||
1841 | /* Stop replaying a thread. */ | |
1842 | ||
1843 | static void | |
1844 | record_btrace_stop_replaying (struct thread_info *tp) | |
1845 | { | |
1846 | struct btrace_thread_info *btinfo; | |
1847 | ||
1848 | btinfo = &tp->btrace; | |
1849 | ||
1850 | xfree (btinfo->replay); | |
1851 | btinfo->replay = NULL; | |
1852 | ||
1853 | /* Make sure we're not leaving any stale registers. */ | |
1854 | registers_changed_ptid (tp->ptid); | |
1855 | } | |
1856 | ||
e3cfc1c7 MM |
1857 | /* Stop replaying TP if it is at the end of its execution history. */ |
1858 | ||
1859 | static void | |
1860 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
1861 | { | |
1862 | struct btrace_insn_iterator *replay, end; | |
1863 | struct btrace_thread_info *btinfo; | |
1864 | ||
1865 | btinfo = &tp->btrace; | |
1866 | replay = btinfo->replay; | |
1867 | ||
1868 | if (replay == NULL) | |
1869 | return; | |
1870 | ||
1871 | btrace_insn_end (&end, btinfo); | |
1872 | ||
1873 | if (btrace_insn_cmp (replay, &end) == 0) | |
1874 | record_btrace_stop_replaying (tp); | |
1875 | } | |
1876 | ||
b2f4cfde MM |
1877 | /* The to_resume method of target record-btrace. */ |
1878 | ||
1879 | static void | |
1880 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1881 | enum gdb_signal signal) | |
1882 | { | |
0ca912df | 1883 | struct thread_info *tp; |
52834460 | 1884 | enum btrace_thread_flag flag; |
0ca912df | 1885 | ptid_t orig_ptid; |
52834460 | 1886 | |
987e68b1 MM |
1887 | DEBUG ("resume %s: %s%s", target_pid_to_str (ptid), |
1888 | execution_direction == EXEC_REVERSE ? "reverse-" : "", | |
1889 | step ? "step" : "cont"); | |
52834460 | 1890 | |
0ca912df MM |
1891 | orig_ptid = ptid; |
1892 | ||
1893 | /* Store the execution direction of the last resume. | |
1894 | ||
1895 | If there is more than one to_resume call, we have to rely on infrun | |
1896 | to not change the execution direction in-between. */ | |
70ad5bff MM |
1897 | record_btrace_resume_exec_dir = execution_direction; |
1898 | ||
0ca912df MM |
1899 | /* For all-stop targets... */ |
1900 | if (!target_is_non_stop_p ()) | |
1901 | { | |
1902 | /* ...we pick the current thread when asked to resume an entire process | |
1903 | or everything. */ | |
1904 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1905 | ptid = inferior_ptid; | |
1906 | ||
1907 | tp = find_thread_ptid (ptid); | |
1908 | if (tp == NULL) | |
1909 | error (_("Cannot find thread to resume.")); | |
1910 | ||
1911 | /* ...and we stop replaying other threads if the thread to resume is not | |
1912 | replaying. */ | |
1913 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
1914 | ALL_NON_EXITED_THREADS (tp) | |
1915 | record_btrace_stop_replaying (tp); | |
1916 | } | |
52834460 | 1917 | |
0ca912df | 1918 | /* As long as we're not replaying, just forward the request. |
52834460 | 1919 | |
0ca912df MM |
1920 | For non-stop targets this means that no thread is replaying. In order to |
1921 | make progress, we may need to explicitly move replaying threads to the end | |
1922 | of their execution history. */ | |
1c63c994 | 1923 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 1924 | { |
e75fdfca | 1925 | ops = ops->beneath; |
0ca912df | 1926 | return ops->to_resume (ops, orig_ptid, step, signal); |
b2f4cfde MM |
1927 | } |
1928 | ||
52834460 MM |
1929 | /* Compute the btrace thread flag for the requested move. */ |
1930 | if (step == 0) | |
1931 | flag = execution_direction == EXEC_REVERSE ? BTHR_RCONT : BTHR_CONT; | |
1932 | else | |
1933 | flag = execution_direction == EXEC_REVERSE ? BTHR_RSTEP : BTHR_STEP; | |
1934 | ||
52834460 MM |
1935 | /* We just indicate the resume intent here. The actual stepping happens in |
1936 | record_btrace_wait below. */ | |
0ca912df MM |
1937 | ALL_NON_EXITED_THREADS (tp) |
1938 | if (ptid_match (tp->ptid, ptid)) | |
1939 | record_btrace_resume_thread (tp, flag); | |
70ad5bff MM |
1940 | |
1941 | /* Async support. */ | |
1942 | if (target_can_async_p ()) | |
1943 | { | |
6a3753b3 | 1944 | target_async (1); |
70ad5bff MM |
1945 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
1946 | } | |
52834460 MM |
1947 | } |
1948 | ||
987e68b1 MM |
1949 | /* Cancel resuming TP. */ |
1950 | ||
1951 | static void | |
1952 | record_btrace_cancel_resume (struct thread_info *tp) | |
1953 | { | |
1954 | enum btrace_thread_flag flags; | |
1955 | ||
1956 | flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP); | |
1957 | if (flags == 0) | |
1958 | return; | |
1959 | ||
1960 | DEBUG ("cancel resume thread %d (%s): %x (%s)", tp->num, | |
1961 | target_pid_to_str (tp->ptid), flags, | |
1962 | btrace_thread_flag_to_str (flags)); | |
1963 | ||
1964 | tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP); | |
e3cfc1c7 | 1965 | record_btrace_stop_replaying_at_end (tp); |
52834460 MM |
1966 | } |
1967 | ||
1968 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1969 | ||
1970 | static struct target_waitstatus | |
1971 | btrace_step_no_history (void) | |
1972 | { | |
1973 | struct target_waitstatus status; | |
1974 | ||
1975 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1976 | ||
1977 | return status; | |
1978 | } | |
1979 | ||
1980 | /* Return a target_waitstatus indicating that a step finished. */ | |
1981 | ||
1982 | static struct target_waitstatus | |
1983 | btrace_step_stopped (void) | |
1984 | { | |
1985 | struct target_waitstatus status; | |
1986 | ||
1987 | status.kind = TARGET_WAITKIND_STOPPED; | |
1988 | status.value.sig = GDB_SIGNAL_TRAP; | |
1989 | ||
1990 | return status; | |
1991 | } | |
1992 | ||
6e4879f0 MM |
1993 | /* Return a target_waitstatus indicating that a thread was stopped as |
1994 | requested. */ | |
1995 | ||
1996 | static struct target_waitstatus | |
1997 | btrace_step_stopped_on_request (void) | |
1998 | { | |
1999 | struct target_waitstatus status; | |
2000 | ||
2001 | status.kind = TARGET_WAITKIND_STOPPED; | |
2002 | status.value.sig = GDB_SIGNAL_0; | |
2003 | ||
2004 | return status; | |
2005 | } | |
2006 | ||
d825d248 MM |
2007 | /* Return a target_waitstatus indicating a spurious stop. */ |
2008 | ||
2009 | static struct target_waitstatus | |
2010 | btrace_step_spurious (void) | |
2011 | { | |
2012 | struct target_waitstatus status; | |
2013 | ||
2014 | status.kind = TARGET_WAITKIND_SPURIOUS; | |
2015 | ||
2016 | return status; | |
2017 | } | |
2018 | ||
e3cfc1c7 MM |
2019 | /* Return a target_waitstatus indicating that the thread was not resumed. */ |
2020 | ||
2021 | static struct target_waitstatus | |
2022 | btrace_step_no_resumed (void) | |
2023 | { | |
2024 | struct target_waitstatus status; | |
2025 | ||
2026 | status.kind = TARGET_WAITKIND_NO_RESUMED; | |
2027 | ||
2028 | return status; | |
2029 | } | |
2030 | ||
2031 | /* Return a target_waitstatus indicating that we should wait again. */ | |
2032 | ||
2033 | static struct target_waitstatus | |
2034 | btrace_step_again (void) | |
2035 | { | |
2036 | struct target_waitstatus status; | |
2037 | ||
2038 | status.kind = TARGET_WAITKIND_IGNORE; | |
2039 | ||
2040 | return status; | |
2041 | } | |
2042 | ||
52834460 MM |
2043 | /* Clear the record histories. */ |
2044 | ||
2045 | static void | |
2046 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
2047 | { | |
2048 | xfree (btinfo->insn_history); | |
2049 | xfree (btinfo->call_history); | |
2050 | ||
2051 | btinfo->insn_history = NULL; | |
2052 | btinfo->call_history = NULL; | |
2053 | } | |
2054 | ||
3c615f99 MM |
2055 | /* Check whether TP's current replay position is at a breakpoint. */ |
2056 | ||
2057 | static int | |
2058 | record_btrace_replay_at_breakpoint (struct thread_info *tp) | |
2059 | { | |
2060 | struct btrace_insn_iterator *replay; | |
2061 | struct btrace_thread_info *btinfo; | |
2062 | const struct btrace_insn *insn; | |
2063 | struct inferior *inf; | |
2064 | ||
2065 | btinfo = &tp->btrace; | |
2066 | replay = btinfo->replay; | |
2067 | ||
2068 | if (replay == NULL) | |
2069 | return 0; | |
2070 | ||
2071 | insn = btrace_insn_get (replay); | |
2072 | if (insn == NULL) | |
2073 | return 0; | |
2074 | ||
2075 | inf = find_inferior_ptid (tp->ptid); | |
2076 | if (inf == NULL) | |
2077 | return 0; | |
2078 | ||
2079 | return record_check_stopped_by_breakpoint (inf->aspace, insn->pc, | |
2080 | &btinfo->stop_reason); | |
2081 | } | |
2082 | ||
d825d248 | 2083 | /* Step one instruction in forward direction. */ |
52834460 MM |
2084 | |
2085 | static struct target_waitstatus | |
d825d248 | 2086 | record_btrace_single_step_forward (struct thread_info *tp) |
52834460 MM |
2087 | { |
2088 | struct btrace_insn_iterator *replay, end; | |
2089 | struct btrace_thread_info *btinfo; | |
52834460 | 2090 | |
d825d248 MM |
2091 | btinfo = &tp->btrace; |
2092 | replay = btinfo->replay; | |
2093 | ||
2094 | /* We're done if we're not replaying. */ | |
2095 | if (replay == NULL) | |
2096 | return btrace_step_no_history (); | |
2097 | ||
011c71b6 MM |
2098 | /* Check if we're stepping a breakpoint. */ |
2099 | if (record_btrace_replay_at_breakpoint (tp)) | |
2100 | return btrace_step_stopped (); | |
2101 | ||
d825d248 MM |
2102 | /* Skip gaps during replay. */ |
2103 | do | |
2104 | { | |
2105 | unsigned int steps; | |
2106 | ||
e3cfc1c7 MM |
2107 | /* We will bail out here if we continue stepping after reaching the end |
2108 | of the execution history. */ | |
d825d248 MM |
2109 | steps = btrace_insn_next (replay, 1); |
2110 | if (steps == 0) | |
e3cfc1c7 | 2111 | return btrace_step_no_history (); |
d825d248 MM |
2112 | } |
2113 | while (btrace_insn_get (replay) == NULL); | |
2114 | ||
2115 | /* Determine the end of the instruction trace. */ | |
2116 | btrace_insn_end (&end, btinfo); | |
2117 | ||
e3cfc1c7 MM |
2118 | /* The execution trace contains (and ends with) the current instruction. |
2119 | This instruction has not been executed, yet, so the trace really ends | |
2120 | one instruction earlier. */ | |
d825d248 | 2121 | if (btrace_insn_cmp (replay, &end) == 0) |
e3cfc1c7 | 2122 | return btrace_step_no_history (); |
d825d248 MM |
2123 | |
2124 | return btrace_step_spurious (); | |
2125 | } | |
2126 | ||
2127 | /* Step one instruction in backward direction. */ | |
2128 | ||
2129 | static struct target_waitstatus | |
2130 | record_btrace_single_step_backward (struct thread_info *tp) | |
2131 | { | |
2132 | struct btrace_insn_iterator *replay; | |
2133 | struct btrace_thread_info *btinfo; | |
e59fa00f | 2134 | |
52834460 MM |
2135 | btinfo = &tp->btrace; |
2136 | replay = btinfo->replay; | |
2137 | ||
d825d248 MM |
2138 | /* Start replaying if we're not already doing so. */ |
2139 | if (replay == NULL) | |
2140 | replay = record_btrace_start_replaying (tp); | |
2141 | ||
2142 | /* If we can't step any further, we reached the end of the history. | |
2143 | Skip gaps during replay. */ | |
2144 | do | |
2145 | { | |
2146 | unsigned int steps; | |
2147 | ||
2148 | steps = btrace_insn_prev (replay, 1); | |
2149 | if (steps == 0) | |
2150 | return btrace_step_no_history (); | |
2151 | } | |
2152 | while (btrace_insn_get (replay) == NULL); | |
2153 | ||
011c71b6 MM |
2154 | /* Check if we're stepping a breakpoint. |
2155 | ||
2156 | For reverse-stepping, this check is after the step. There is logic in | |
2157 | infrun.c that handles reverse-stepping separately. See, for example, | |
2158 | proceed and adjust_pc_after_break. | |
2159 | ||
2160 | This code assumes that for reverse-stepping, PC points to the last | |
2161 | de-executed instruction, whereas for forward-stepping PC points to the | |
2162 | next to-be-executed instruction. */ | |
2163 | if (record_btrace_replay_at_breakpoint (tp)) | |
2164 | return btrace_step_stopped (); | |
2165 | ||
d825d248 MM |
2166 | return btrace_step_spurious (); |
2167 | } | |
2168 | ||
2169 | /* Step a single thread. */ | |
2170 | ||
2171 | static struct target_waitstatus | |
2172 | record_btrace_step_thread (struct thread_info *tp) | |
2173 | { | |
2174 | struct btrace_thread_info *btinfo; | |
2175 | struct target_waitstatus status; | |
2176 | enum btrace_thread_flag flags; | |
2177 | ||
2178 | btinfo = &tp->btrace; | |
2179 | ||
6e4879f0 MM |
2180 | flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP); |
2181 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 | 2182 | |
987e68b1 MM |
2183 | DEBUG ("stepping thread %d (%s): %x (%s)", tp->num, |
2184 | target_pid_to_str (tp->ptid), flags, | |
2185 | btrace_thread_flag_to_str (flags)); | |
52834460 | 2186 | |
6e4879f0 MM |
2187 | /* We can't step without an execution history. */ |
2188 | if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp)) | |
2189 | return btrace_step_no_history (); | |
2190 | ||
52834460 MM |
2191 | switch (flags) |
2192 | { | |
2193 | default: | |
2194 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
2195 | ||
6e4879f0 MM |
2196 | case BTHR_STOP: |
2197 | return btrace_step_stopped_on_request (); | |
2198 | ||
52834460 | 2199 | case BTHR_STEP: |
d825d248 MM |
2200 | status = record_btrace_single_step_forward (tp); |
2201 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2202 | break; |
52834460 MM |
2203 | |
2204 | return btrace_step_stopped (); | |
2205 | ||
2206 | case BTHR_RSTEP: | |
d825d248 MM |
2207 | status = record_btrace_single_step_backward (tp); |
2208 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2209 | break; |
52834460 MM |
2210 | |
2211 | return btrace_step_stopped (); | |
2212 | ||
2213 | case BTHR_CONT: | |
e3cfc1c7 MM |
2214 | status = record_btrace_single_step_forward (tp); |
2215 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2216 | break; | |
52834460 | 2217 | |
e3cfc1c7 MM |
2218 | btinfo->flags |= flags; |
2219 | return btrace_step_again (); | |
52834460 MM |
2220 | |
2221 | case BTHR_RCONT: | |
e3cfc1c7 MM |
2222 | status = record_btrace_single_step_backward (tp); |
2223 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2224 | break; | |
52834460 | 2225 | |
e3cfc1c7 MM |
2226 | btinfo->flags |= flags; |
2227 | return btrace_step_again (); | |
2228 | } | |
d825d248 | 2229 | |
e3cfc1c7 MM |
2230 | /* We keep threads moving at the end of their execution history. The to_wait |
2231 | method will stop the thread for whom the event is reported. */ | |
2232 | if (status.kind == TARGET_WAITKIND_NO_HISTORY) | |
2233 | btinfo->flags |= flags; | |
52834460 | 2234 | |
e3cfc1c7 | 2235 | return status; |
b2f4cfde MM |
2236 | } |
2237 | ||
e3cfc1c7 MM |
2238 | /* A vector of threads. */ |
2239 | ||
2240 | typedef struct thread_info * tp_t; | |
2241 | DEF_VEC_P (tp_t); | |
2242 | ||
b2f4cfde MM |
2243 | /* The to_wait method of target record-btrace. */ |
2244 | ||
2245 | static ptid_t | |
2246 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2247 | struct target_waitstatus *status, int options) | |
2248 | { | |
e3cfc1c7 MM |
2249 | VEC (tp_t) *moving, *no_history; |
2250 | struct thread_info *tp, *eventing; | |
2251 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
52834460 MM |
2252 | |
2253 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2254 | ||
b2f4cfde | 2255 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 2256 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde | 2257 | { |
e75fdfca TT |
2258 | ops = ops->beneath; |
2259 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2260 | } |
2261 | ||
e3cfc1c7 MM |
2262 | moving = NULL; |
2263 | no_history = NULL; | |
2264 | ||
2265 | make_cleanup (VEC_cleanup (tp_t), &moving); | |
2266 | make_cleanup (VEC_cleanup (tp_t), &no_history); | |
2267 | ||
2268 | /* Keep a work list of moving threads. */ | |
2269 | ALL_NON_EXITED_THREADS (tp) | |
2270 | if (ptid_match (tp->ptid, ptid) | |
2271 | && ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)) | |
2272 | VEC_safe_push (tp_t, moving, tp); | |
2273 | ||
2274 | if (VEC_empty (tp_t, moving)) | |
52834460 | 2275 | { |
e3cfc1c7 | 2276 | *status = btrace_step_no_resumed (); |
52834460 | 2277 | |
e3cfc1c7 MM |
2278 | DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid), |
2279 | target_waitstatus_to_string (status)); | |
2280 | ||
2281 | do_cleanups (cleanups); | |
2282 | return null_ptid; | |
52834460 MM |
2283 | } |
2284 | ||
e3cfc1c7 MM |
2285 | /* Step moving threads one by one, one step each, until either one thread |
2286 | reports an event or we run out of threads to step. | |
2287 | ||
2288 | When stepping more than one thread, chances are that some threads reach | |
2289 | the end of their execution history earlier than others. If we reported | |
2290 | this immediately, all-stop on top of non-stop would stop all threads and | |
2291 | resume the same threads next time. And we would report the same thread | |
2292 | having reached the end of its execution history again. | |
2293 | ||
2294 | In the worst case, this would starve the other threads. But even if other | |
2295 | threads would be allowed to make progress, this would result in far too | |
2296 | many intermediate stops. | |
2297 | ||
2298 | We therefore delay the reporting of "no execution history" until we have | |
2299 | nothing else to report. By this time, all threads should have moved to | |
2300 | either the beginning or the end of their execution history. There will | |
2301 | be a single user-visible stop. */ | |
2302 | eventing = NULL; | |
2303 | while ((eventing == NULL) && !VEC_empty (tp_t, moving)) | |
2304 | { | |
2305 | unsigned int ix; | |
2306 | ||
2307 | ix = 0; | |
2308 | while ((eventing == NULL) && VEC_iterate (tp_t, moving, ix, tp)) | |
2309 | { | |
2310 | *status = record_btrace_step_thread (tp); | |
2311 | ||
2312 | switch (status->kind) | |
2313 | { | |
2314 | case TARGET_WAITKIND_IGNORE: | |
2315 | ix++; | |
2316 | break; | |
2317 | ||
2318 | case TARGET_WAITKIND_NO_HISTORY: | |
2319 | VEC_safe_push (tp_t, no_history, | |
2320 | VEC_ordered_remove (tp_t, moving, ix)); | |
2321 | break; | |
2322 | ||
2323 | default: | |
2324 | eventing = VEC_unordered_remove (tp_t, moving, ix); | |
2325 | break; | |
2326 | } | |
2327 | } | |
2328 | } | |
2329 | ||
2330 | if (eventing == NULL) | |
2331 | { | |
2332 | /* We started with at least one moving thread. This thread must have | |
2333 | either stopped or reached the end of its execution history. | |
2334 | ||
2335 | In the former case, EVENTING must not be NULL. | |
2336 | In the latter case, NO_HISTORY must not be empty. */ | |
2337 | gdb_assert (!VEC_empty (tp_t, no_history)); | |
2338 | ||
2339 | /* We kept threads moving at the end of their execution history. Stop | |
2340 | EVENTING now that we are going to report its stop. */ | |
2341 | eventing = VEC_unordered_remove (tp_t, no_history, 0); | |
2342 | eventing->btrace.flags &= ~BTHR_MOVE; | |
2343 | ||
2344 | *status = btrace_step_no_history (); | |
2345 | } | |
2346 | ||
2347 | gdb_assert (eventing != NULL); | |
2348 | ||
2349 | /* We kept threads replaying at the end of their execution history. Stop | |
2350 | replaying EVENTING now that we are going to report its stop. */ | |
2351 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2352 | |
2353 | /* Stop all other threads. */ | |
5953356c | 2354 | if (!target_is_non_stop_p ()) |
e3cfc1c7 MM |
2355 | ALL_NON_EXITED_THREADS (tp) |
2356 | record_btrace_cancel_resume (tp); | |
52834460 MM |
2357 | |
2358 | /* Start record histories anew from the current position. */ | |
e3cfc1c7 | 2359 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2360 | |
2361 | /* We moved the replay position but did not update registers. */ | |
e3cfc1c7 MM |
2362 | registers_changed_ptid (eventing->ptid); |
2363 | ||
2364 | DEBUG ("wait ended by thread %d (%s): %s", eventing->num, | |
2365 | target_pid_to_str (eventing->ptid), | |
2366 | target_waitstatus_to_string (status)); | |
52834460 | 2367 | |
e3cfc1c7 MM |
2368 | do_cleanups (cleanups); |
2369 | return eventing->ptid; | |
52834460 MM |
2370 | } |
2371 | ||
6e4879f0 MM |
2372 | /* The to_stop method of target record-btrace. */ |
2373 | ||
2374 | static void | |
2375 | record_btrace_stop (struct target_ops *ops, ptid_t ptid) | |
2376 | { | |
2377 | DEBUG ("stop %s", target_pid_to_str (ptid)); | |
2378 | ||
2379 | /* As long as we're not replaying, just forward the request. */ | |
2380 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) | |
2381 | { | |
2382 | ops = ops->beneath; | |
2383 | ops->to_stop (ops, ptid); | |
2384 | } | |
2385 | else | |
2386 | { | |
2387 | struct thread_info *tp; | |
2388 | ||
2389 | ALL_NON_EXITED_THREADS (tp) | |
2390 | if (ptid_match (tp->ptid, ptid)) | |
2391 | { | |
2392 | tp->btrace.flags &= ~BTHR_MOVE; | |
2393 | tp->btrace.flags |= BTHR_STOP; | |
2394 | } | |
2395 | } | |
2396 | } | |
2397 | ||
52834460 MM |
2398 | /* The to_can_execute_reverse method of target record-btrace. */ |
2399 | ||
2400 | static int | |
19db3e69 | 2401 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2402 | { |
2403 | return 1; | |
2404 | } | |
2405 | ||
9e8915c6 | 2406 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2407 | |
9e8915c6 PA |
2408 | static int |
2409 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2410 | { |
1c63c994 | 2411 | if (record_btrace_is_replaying (ops)) |
9e8915c6 PA |
2412 | { |
2413 | struct thread_info *tp = inferior_thread (); | |
2414 | ||
2415 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2416 | } | |
2417 | ||
2418 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2419 | } | |
2420 | ||
2421 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2422 | record-btrace. */ | |
2423 | ||
2424 | static int | |
2425 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2426 | { | |
2427 | if (record_btrace_is_replaying (ops)) | |
2428 | return 1; | |
2429 | ||
2430 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2431 | } | |
2432 | ||
2433 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2434 | ||
2435 | static int | |
2436 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2437 | { | |
2438 | if (record_btrace_is_replaying (ops)) | |
2439 | { | |
2440 | struct thread_info *tp = inferior_thread (); | |
2441 | ||
2442 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2443 | } | |
2444 | ||
2445 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2446 | } | |
2447 | ||
2448 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2449 | record-btrace. */ | |
2450 | ||
2451 | static int | |
2452 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2453 | { | |
2454 | if (record_btrace_is_replaying (ops)) | |
2455 | return 1; | |
52834460 | 2456 | |
9e8915c6 | 2457 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2458 | } |
2459 | ||
e8032dde | 2460 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2461 | |
2462 | static void | |
e8032dde | 2463 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2464 | { |
e8032dde | 2465 | /* We don't add or remove threads during replay. */ |
1c63c994 | 2466 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2467 | return; |
2468 | ||
2469 | /* Forward the request. */ | |
e75fdfca | 2470 | ops = ops->beneath; |
e8032dde | 2471 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2472 | } |
2473 | ||
2474 | /* The to_thread_alive method of target record-btrace. */ | |
2475 | ||
2476 | static int | |
2477 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2478 | { | |
2479 | /* We don't add or remove threads during replay. */ | |
1c63c994 | 2480 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
2481 | return find_thread_ptid (ptid) != NULL; |
2482 | ||
2483 | /* Forward the request. */ | |
e75fdfca TT |
2484 | ops = ops->beneath; |
2485 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2486 | } |
2487 | ||
066ce621 MM |
2488 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2489 | is stopped. */ | |
2490 | ||
2491 | static void | |
2492 | record_btrace_set_replay (struct thread_info *tp, | |
2493 | const struct btrace_insn_iterator *it) | |
2494 | { | |
2495 | struct btrace_thread_info *btinfo; | |
2496 | ||
2497 | btinfo = &tp->btrace; | |
2498 | ||
2499 | if (it == NULL || it->function == NULL) | |
52834460 | 2500 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2501 | else |
2502 | { | |
2503 | if (btinfo->replay == NULL) | |
52834460 | 2504 | record_btrace_start_replaying (tp); |
066ce621 MM |
2505 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2506 | return; | |
2507 | ||
2508 | *btinfo->replay = *it; | |
52834460 | 2509 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2510 | } |
2511 | ||
52834460 MM |
2512 | /* Start anew from the new replay position. */ |
2513 | record_btrace_clear_histories (btinfo); | |
485668e5 MM |
2514 | |
2515 | stop_pc = regcache_read_pc (get_current_regcache ()); | |
2516 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
066ce621 MM |
2517 | } |
2518 | ||
2519 | /* The to_goto_record_begin method of target record-btrace. */ | |
2520 | ||
2521 | static void | |
08475817 | 2522 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2523 | { |
2524 | struct thread_info *tp; | |
2525 | struct btrace_insn_iterator begin; | |
2526 | ||
2527 | tp = require_btrace_thread (); | |
2528 | ||
2529 | btrace_insn_begin (&begin, &tp->btrace); | |
2530 | record_btrace_set_replay (tp, &begin); | |
066ce621 MM |
2531 | } |
2532 | ||
2533 | /* The to_goto_record_end method of target record-btrace. */ | |
2534 | ||
2535 | static void | |
307a1b91 | 2536 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2537 | { |
2538 | struct thread_info *tp; | |
2539 | ||
2540 | tp = require_btrace_thread (); | |
2541 | ||
2542 | record_btrace_set_replay (tp, NULL); | |
066ce621 MM |
2543 | } |
2544 | ||
2545 | /* The to_goto_record method of target record-btrace. */ | |
2546 | ||
2547 | static void | |
606183ac | 2548 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2549 | { |
2550 | struct thread_info *tp; | |
2551 | struct btrace_insn_iterator it; | |
2552 | unsigned int number; | |
2553 | int found; | |
2554 | ||
2555 | number = insn; | |
2556 | ||
2557 | /* Check for wrap-arounds. */ | |
2558 | if (number != insn) | |
2559 | error (_("Instruction number out of range.")); | |
2560 | ||
2561 | tp = require_btrace_thread (); | |
2562 | ||
2563 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2564 | if (found == 0) | |
2565 | error (_("No such instruction.")); | |
2566 | ||
2567 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2568 | } |
2569 | ||
70ad5bff MM |
2570 | /* The to_execution_direction target method. */ |
2571 | ||
2572 | static enum exec_direction_kind | |
2573 | record_btrace_execution_direction (struct target_ops *self) | |
2574 | { | |
2575 | return record_btrace_resume_exec_dir; | |
2576 | } | |
2577 | ||
aef92902 MM |
2578 | /* The to_prepare_to_generate_core target method. */ |
2579 | ||
2580 | static void | |
2581 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2582 | { | |
2583 | record_btrace_generating_corefile = 1; | |
2584 | } | |
2585 | ||
2586 | /* The to_done_generating_core target method. */ | |
2587 | ||
2588 | static void | |
2589 | record_btrace_done_generating_core (struct target_ops *self) | |
2590 | { | |
2591 | record_btrace_generating_corefile = 0; | |
2592 | } | |
2593 | ||
afedecd3 MM |
2594 | /* Initialize the record-btrace target ops. */ |
2595 | ||
2596 | static void | |
2597 | init_record_btrace_ops (void) | |
2598 | { | |
2599 | struct target_ops *ops; | |
2600 | ||
2601 | ops = &record_btrace_ops; | |
2602 | ops->to_shortname = "record-btrace"; | |
2603 | ops->to_longname = "Branch tracing target"; | |
2604 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2605 | ops->to_open = record_btrace_open; | |
2606 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2607 | ops->to_async = record_btrace_async; |
afedecd3 MM |
2608 | ops->to_detach = record_detach; |
2609 | ops->to_disconnect = record_disconnect; | |
2610 | ops->to_mourn_inferior = record_mourn_inferior; | |
2611 | ops->to_kill = record_kill; | |
afedecd3 MM |
2612 | ops->to_stop_recording = record_btrace_stop_recording; |
2613 | ops->to_info_record = record_btrace_info; | |
2614 | ops->to_insn_history = record_btrace_insn_history; | |
2615 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2616 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2617 | ops->to_call_history = record_btrace_call_history; | |
2618 | ops->to_call_history_from = record_btrace_call_history_from; | |
2619 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2620 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
2621 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2622 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2623 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2624 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2625 | ops->to_store_registers = record_btrace_store_registers; | |
2626 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2627 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2628 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2629 | ops->to_resume = record_btrace_resume; |
2630 | ops->to_wait = record_btrace_wait; | |
6e4879f0 | 2631 | ops->to_stop = record_btrace_stop; |
e8032dde | 2632 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2633 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2634 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2635 | ops->to_goto_record_end = record_btrace_goto_end; | |
2636 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2637 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2638 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2639 | ops->to_supports_stopped_by_sw_breakpoint | |
2640 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2641 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2642 | ops->to_supports_stopped_by_hw_breakpoint | |
2643 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2644 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2645 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2646 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2647 | ops->to_stratum = record_stratum; |
2648 | ops->to_magic = OPS_MAGIC; | |
2649 | } | |
2650 | ||
f4abbc16 MM |
2651 | /* Start recording in BTS format. */ |
2652 | ||
2653 | static void | |
2654 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2655 | { | |
f4abbc16 MM |
2656 | if (args != NULL && *args != 0) |
2657 | error (_("Invalid argument.")); | |
2658 | ||
2659 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2660 | ||
492d29ea PA |
2661 | TRY |
2662 | { | |
2663 | execute_command ("target record-btrace", from_tty); | |
2664 | } | |
2665 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2666 | { |
2667 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2668 | throw_exception (exception); | |
2669 | } | |
492d29ea | 2670 | END_CATCH |
f4abbc16 MM |
2671 | } |
2672 | ||
b20a6524 | 2673 | /* Start recording Intel(R) Processor Trace. */ |
afedecd3 MM |
2674 | |
2675 | static void | |
b20a6524 | 2676 | cmd_record_btrace_pt_start (char *args, int from_tty) |
afedecd3 MM |
2677 | { |
2678 | if (args != NULL && *args != 0) | |
2679 | error (_("Invalid argument.")); | |
2680 | ||
b20a6524 | 2681 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2682 | |
492d29ea PA |
2683 | TRY |
2684 | { | |
2685 | execute_command ("target record-btrace", from_tty); | |
2686 | } | |
2687 | CATCH (exception, RETURN_MASK_ALL) | |
2688 | { | |
2689 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2690 | throw_exception (exception); | |
2691 | } | |
2692 | END_CATCH | |
afedecd3 MM |
2693 | } |
2694 | ||
b20a6524 MM |
2695 | /* Alias for "target record". */ |
2696 | ||
2697 | static void | |
2698 | cmd_record_btrace_start (char *args, int from_tty) | |
2699 | { | |
2700 | if (args != NULL && *args != 0) | |
2701 | error (_("Invalid argument.")); | |
2702 | ||
2703 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2704 | ||
2705 | TRY | |
2706 | { | |
2707 | execute_command ("target record-btrace", from_tty); | |
2708 | } | |
2709 | CATCH (exception, RETURN_MASK_ALL) | |
2710 | { | |
2711 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2712 | ||
2713 | TRY | |
2714 | { | |
2715 | execute_command ("target record-btrace", from_tty); | |
2716 | } | |
2717 | CATCH (exception, RETURN_MASK_ALL) | |
2718 | { | |
2719 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2720 | throw_exception (exception); | |
2721 | } | |
2722 | END_CATCH | |
2723 | } | |
2724 | END_CATCH | |
2725 | } | |
2726 | ||
67b5c0c1 MM |
2727 | /* The "set record btrace" command. */ |
2728 | ||
2729 | static void | |
2730 | cmd_set_record_btrace (char *args, int from_tty) | |
2731 | { | |
2732 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2733 | } | |
2734 | ||
2735 | /* The "show record btrace" command. */ | |
2736 | ||
2737 | static void | |
2738 | cmd_show_record_btrace (char *args, int from_tty) | |
2739 | { | |
2740 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2741 | } | |
2742 | ||
2743 | /* The "show record btrace replay-memory-access" command. */ | |
2744 | ||
2745 | static void | |
2746 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2747 | struct cmd_list_element *c, const char *value) | |
2748 | { | |
2749 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2750 | replay_memory_access); | |
2751 | } | |
2752 | ||
d33501a5 MM |
2753 | /* The "set record btrace bts" command. */ |
2754 | ||
2755 | static void | |
2756 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
2757 | { | |
2758 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
b20a6524 | 2759 | "by an appropriate subcommand.\n")); |
d33501a5 MM |
2760 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", |
2761 | all_commands, gdb_stdout); | |
2762 | } | |
2763 | ||
2764 | /* The "show record btrace bts" command. */ | |
2765 | ||
2766 | static void | |
2767 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
2768 | { | |
2769 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
2770 | } | |
2771 | ||
b20a6524 MM |
2772 | /* The "set record btrace pt" command. */ |
2773 | ||
2774 | static void | |
2775 | cmd_set_record_btrace_pt (char *args, int from_tty) | |
2776 | { | |
2777 | printf_unfiltered (_("\"set record btrace pt\" must be followed " | |
2778 | "by an appropriate subcommand.\n")); | |
2779 | help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ", | |
2780 | all_commands, gdb_stdout); | |
2781 | } | |
2782 | ||
2783 | /* The "show record btrace pt" command. */ | |
2784 | ||
2785 | static void | |
2786 | cmd_show_record_btrace_pt (char *args, int from_tty) | |
2787 | { | |
2788 | cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, ""); | |
2789 | } | |
2790 | ||
2791 | /* The "record bts buffer-size" show value function. */ | |
2792 | ||
2793 | static void | |
2794 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
2795 | struct cmd_list_element *c, | |
2796 | const char *value) | |
2797 | { | |
2798 | fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"), | |
2799 | value); | |
2800 | } | |
2801 | ||
2802 | /* The "record pt buffer-size" show value function. */ | |
2803 | ||
2804 | static void | |
2805 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
2806 | struct cmd_list_element *c, | |
2807 | const char *value) | |
2808 | { | |
2809 | fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"), | |
2810 | value); | |
2811 | } | |
2812 | ||
afedecd3 MM |
2813 | void _initialize_record_btrace (void); |
2814 | ||
2815 | /* Initialize btrace commands. */ | |
2816 | ||
2817 | void | |
2818 | _initialize_record_btrace (void) | |
2819 | { | |
f4abbc16 MM |
2820 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
2821 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
2822 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
2823 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
2824 | ||
f4abbc16 MM |
2825 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
2826 | _("\ | |
2827 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
2828 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
2829 | This format may not be available on all processors."), | |
2830 | &record_btrace_cmdlist); | |
2831 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
2832 | ||
b20a6524 MM |
2833 | add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, |
2834 | _("\ | |
2835 | Start branch trace recording in Intel(R) Processor Trace format.\n\n\ | |
2836 | This format may not be available on all processors."), | |
2837 | &record_btrace_cmdlist); | |
2838 | add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist); | |
2839 | ||
67b5c0c1 MM |
2840 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
2841 | _("Set record options"), &set_record_btrace_cmdlist, | |
2842 | "set record btrace ", 0, &set_record_cmdlist); | |
2843 | ||
2844 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
2845 | _("Show record options"), &show_record_btrace_cmdlist, | |
2846 | "show record btrace ", 0, &show_record_cmdlist); | |
2847 | ||
2848 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
2849 | replay_memory_access_types, &replay_memory_access, _("\ | |
2850 | Set what memory accesses are allowed during replay."), _("\ | |
2851 | Show what memory accesses are allowed during replay."), | |
2852 | _("Default is READ-ONLY.\n\n\ | |
2853 | The btrace record target does not trace data.\n\ | |
2854 | The memory therefore corresponds to the live target and not \ | |
2855 | to the current replay position.\n\n\ | |
2856 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
2857 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
2858 | replay."), | |
2859 | NULL, cmd_show_replay_memory_access, | |
2860 | &set_record_btrace_cmdlist, | |
2861 | &show_record_btrace_cmdlist); | |
2862 | ||
d33501a5 MM |
2863 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
2864 | _("Set record btrace bts options"), | |
2865 | &set_record_btrace_bts_cmdlist, | |
2866 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
2867 | ||
2868 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
2869 | _("Show record btrace bts options"), | |
2870 | &show_record_btrace_bts_cmdlist, | |
2871 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
2872 | ||
2873 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2874 | &record_btrace_conf.bts.size, | |
2875 | _("Set the record/replay bts buffer size."), | |
2876 | _("Show the record/replay bts buffer size."), _("\ | |
2877 | When starting recording request a trace buffer of this size. \ | |
2878 | The actual buffer size may differ from the requested size. \ | |
2879 | Use \"info record\" to see the actual buffer size.\n\n\ | |
2880 | Bigger buffers allow longer recording but also take more time to process \ | |
2881 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
2882 | The trace buffer size may not be changed while recording."), NULL, |
2883 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
2884 | &set_record_btrace_bts_cmdlist, |
2885 | &show_record_btrace_bts_cmdlist); | |
2886 | ||
b20a6524 MM |
2887 | add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt, |
2888 | _("Set record btrace pt options"), | |
2889 | &set_record_btrace_pt_cmdlist, | |
2890 | "set record btrace pt ", 0, &set_record_btrace_cmdlist); | |
2891 | ||
2892 | add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt, | |
2893 | _("Show record btrace pt options"), | |
2894 | &show_record_btrace_pt_cmdlist, | |
2895 | "show record btrace pt ", 0, &show_record_btrace_cmdlist); | |
2896 | ||
2897 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2898 | &record_btrace_conf.pt.size, | |
2899 | _("Set the record/replay pt buffer size."), | |
2900 | _("Show the record/replay pt buffer size."), _("\ | |
2901 | Bigger buffers allow longer recording but also take more time to process \ | |
2902 | the recorded execution.\n\ | |
2903 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
2904 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
2905 | &set_record_btrace_pt_cmdlist, | |
2906 | &show_record_btrace_pt_cmdlist); | |
2907 | ||
afedecd3 MM |
2908 | init_record_btrace_ops (); |
2909 | add_target (&record_btrace_ops); | |
0b722aec MM |
2910 | |
2911 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
2912 | xcalloc, xfree); | |
d33501a5 MM |
2913 | |
2914 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 2915 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 2916 | } |