Commit | Line | Data |
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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
32d0add0 | 3 | Copyright (C) 2013-2015 Free Software Foundation, Inc. |
afedecd3 MM |
4 | |
5 | Contributed by Intel Corp. <markus.t.metzger@intel.com> | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "record.h" | |
24 | #include "gdbthread.h" | |
25 | #include "target.h" | |
26 | #include "gdbcmd.h" | |
27 | #include "disasm.h" | |
28 | #include "observer.h" | |
afedecd3 MM |
29 | #include "cli/cli-utils.h" |
30 | #include "source.h" | |
31 | #include "ui-out.h" | |
32 | #include "symtab.h" | |
33 | #include "filenames.h" | |
1f3ef581 | 34 | #include "regcache.h" |
cecac1ab | 35 | #include "frame-unwind.h" |
0b722aec | 36 | #include "hashtab.h" |
45741a9c | 37 | #include "infrun.h" |
70ad5bff MM |
38 | #include "event-loop.h" |
39 | #include "inf-loop.h" | |
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 | ||
afedecd3 MM |
219 | gdb_assert (record_btrace_thread_observer == NULL); |
220 | ||
221 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 222 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
223 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->num)) |
224 | { | |
f4abbc16 | 225 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
226 | |
227 | make_cleanup (record_btrace_disable_callback, tp); | |
228 | } | |
229 | ||
230 | record_btrace_auto_enable (); | |
231 | ||
232 | push_target (&record_btrace_ops); | |
233 | ||
70ad5bff MM |
234 | record_btrace_async_inferior_event_handler |
235 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
236 | NULL); | |
aef92902 | 237 | record_btrace_generating_corefile = 0; |
70ad5bff | 238 | |
afedecd3 MM |
239 | observer_notify_record_changed (current_inferior (), 1); |
240 | ||
241 | discard_cleanups (disable_chain); | |
242 | } | |
243 | ||
244 | /* The to_stop_recording method of target record-btrace. */ | |
245 | ||
246 | static void | |
c6cd7c02 | 247 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
248 | { |
249 | struct thread_info *tp; | |
250 | ||
251 | DEBUG ("stop recording"); | |
252 | ||
253 | record_btrace_auto_disable (); | |
254 | ||
034f788c | 255 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
256 | if (tp->btrace.target != NULL) |
257 | btrace_disable (tp); | |
258 | } | |
259 | ||
260 | /* The to_close method of target record-btrace. */ | |
261 | ||
262 | static void | |
de90e03d | 263 | record_btrace_close (struct target_ops *self) |
afedecd3 | 264 | { |
568e808b MM |
265 | struct thread_info *tp; |
266 | ||
70ad5bff MM |
267 | if (record_btrace_async_inferior_event_handler != NULL) |
268 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
269 | ||
99c819ee MM |
270 | /* Make sure automatic recording gets disabled even if we did not stop |
271 | recording before closing the record-btrace target. */ | |
272 | record_btrace_auto_disable (); | |
273 | ||
568e808b MM |
274 | /* We should have already stopped recording. |
275 | Tear down btrace in case we have not. */ | |
034f788c | 276 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 277 | btrace_teardown (tp); |
afedecd3 MM |
278 | } |
279 | ||
b7d2e916 PA |
280 | /* The to_async method of target record-btrace. */ |
281 | ||
282 | static void | |
6a3753b3 | 283 | record_btrace_async (struct target_ops *ops, int enable) |
b7d2e916 | 284 | { |
6a3753b3 | 285 | if (enable) |
b7d2e916 PA |
286 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
287 | else | |
288 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
289 | ||
6a3753b3 | 290 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
291 | } |
292 | ||
d33501a5 MM |
293 | /* Adjusts the size and returns a human readable size suffix. */ |
294 | ||
295 | static const char * | |
296 | record_btrace_adjust_size (unsigned int *size) | |
297 | { | |
298 | unsigned int sz; | |
299 | ||
300 | sz = *size; | |
301 | ||
302 | if ((sz & ((1u << 30) - 1)) == 0) | |
303 | { | |
304 | *size = sz >> 30; | |
305 | return "GB"; | |
306 | } | |
307 | else if ((sz & ((1u << 20) - 1)) == 0) | |
308 | { | |
309 | *size = sz >> 20; | |
310 | return "MB"; | |
311 | } | |
312 | else if ((sz & ((1u << 10) - 1)) == 0) | |
313 | { | |
314 | *size = sz >> 10; | |
315 | return "kB"; | |
316 | } | |
317 | else | |
318 | return ""; | |
319 | } | |
320 | ||
321 | /* Print a BTS configuration. */ | |
322 | ||
323 | static void | |
324 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
325 | { | |
326 | const char *suffix; | |
327 | unsigned int size; | |
328 | ||
329 | size = conf->size; | |
330 | if (size > 0) | |
331 | { | |
332 | suffix = record_btrace_adjust_size (&size); | |
333 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
334 | } | |
335 | } | |
336 | ||
b20a6524 MM |
337 | /* Print an Intel(R) Processor Trace configuration. */ |
338 | ||
339 | static void | |
340 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
341 | { | |
342 | const char *suffix; | |
343 | unsigned int size; | |
344 | ||
345 | size = conf->size; | |
346 | if (size > 0) | |
347 | { | |
348 | suffix = record_btrace_adjust_size (&size); | |
349 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
350 | } | |
351 | } | |
352 | ||
d33501a5 MM |
353 | /* Print a branch tracing configuration. */ |
354 | ||
355 | static void | |
356 | record_btrace_print_conf (const struct btrace_config *conf) | |
357 | { | |
358 | printf_unfiltered (_("Recording format: %s.\n"), | |
359 | btrace_format_string (conf->format)); | |
360 | ||
361 | switch (conf->format) | |
362 | { | |
363 | case BTRACE_FORMAT_NONE: | |
364 | return; | |
365 | ||
366 | case BTRACE_FORMAT_BTS: | |
367 | record_btrace_print_bts_conf (&conf->bts); | |
368 | return; | |
b20a6524 MM |
369 | |
370 | case BTRACE_FORMAT_PT: | |
371 | record_btrace_print_pt_conf (&conf->pt); | |
372 | return; | |
d33501a5 MM |
373 | } |
374 | ||
375 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
376 | } | |
377 | ||
afedecd3 MM |
378 | /* The to_info_record method of target record-btrace. */ |
379 | ||
380 | static void | |
630d6a4a | 381 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
382 | { |
383 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 384 | const struct btrace_config *conf; |
afedecd3 | 385 | struct thread_info *tp; |
31fd9caa | 386 | unsigned int insns, calls, gaps; |
afedecd3 MM |
387 | |
388 | DEBUG ("info"); | |
389 | ||
390 | tp = find_thread_ptid (inferior_ptid); | |
391 | if (tp == NULL) | |
392 | error (_("No thread.")); | |
393 | ||
f4abbc16 MM |
394 | btinfo = &tp->btrace; |
395 | ||
396 | conf = btrace_conf (btinfo); | |
397 | if (conf != NULL) | |
d33501a5 | 398 | record_btrace_print_conf (conf); |
f4abbc16 | 399 | |
afedecd3 MM |
400 | btrace_fetch (tp); |
401 | ||
23a7fe75 MM |
402 | insns = 0; |
403 | calls = 0; | |
31fd9caa | 404 | gaps = 0; |
23a7fe75 | 405 | |
6e07b1d2 | 406 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
407 | { |
408 | struct btrace_call_iterator call; | |
409 | struct btrace_insn_iterator insn; | |
410 | ||
411 | btrace_call_end (&call, btinfo); | |
412 | btrace_call_prev (&call, 1); | |
5de9129b | 413 | calls = btrace_call_number (&call); |
23a7fe75 MM |
414 | |
415 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 416 | |
5de9129b | 417 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
418 | if (insns != 0) |
419 | { | |
420 | /* The last instruction does not really belong to the trace. */ | |
421 | insns -= 1; | |
422 | } | |
423 | else | |
424 | { | |
425 | unsigned int steps; | |
426 | ||
427 | /* Skip gaps at the end. */ | |
428 | do | |
429 | { | |
430 | steps = btrace_insn_prev (&insn, 1); | |
431 | if (steps == 0) | |
432 | break; | |
433 | ||
434 | insns = btrace_insn_number (&insn); | |
435 | } | |
436 | while (insns == 0); | |
437 | } | |
438 | ||
439 | gaps = btinfo->ngaps; | |
23a7fe75 | 440 | } |
afedecd3 | 441 | |
31fd9caa MM |
442 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
443 | "for thread %d (%s).\n"), insns, calls, gaps, | |
444 | tp->num, target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
445 | |
446 | if (btrace_is_replaying (tp)) | |
447 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
448 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
449 | } |
450 | ||
31fd9caa MM |
451 | /* Print a decode error. */ |
452 | ||
453 | static void | |
454 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
455 | enum btrace_format format) | |
456 | { | |
457 | const char *errstr; | |
458 | int is_error; | |
459 | ||
460 | errstr = _("unknown"); | |
461 | is_error = 1; | |
462 | ||
463 | switch (format) | |
464 | { | |
465 | default: | |
466 | break; | |
467 | ||
468 | case BTRACE_FORMAT_BTS: | |
469 | switch (errcode) | |
470 | { | |
471 | default: | |
472 | break; | |
473 | ||
474 | case BDE_BTS_OVERFLOW: | |
475 | errstr = _("instruction overflow"); | |
476 | break; | |
477 | ||
478 | case BDE_BTS_INSN_SIZE: | |
479 | errstr = _("unknown instruction"); | |
480 | break; | |
481 | } | |
482 | break; | |
b20a6524 MM |
483 | |
484 | #if defined (HAVE_LIBIPT) | |
485 | case BTRACE_FORMAT_PT: | |
486 | switch (errcode) | |
487 | { | |
488 | case BDE_PT_USER_QUIT: | |
489 | is_error = 0; | |
490 | errstr = _("trace decode cancelled"); | |
491 | break; | |
492 | ||
493 | case BDE_PT_DISABLED: | |
494 | is_error = 0; | |
495 | errstr = _("disabled"); | |
496 | break; | |
497 | ||
498 | case BDE_PT_OVERFLOW: | |
499 | is_error = 0; | |
500 | errstr = _("overflow"); | |
501 | break; | |
502 | ||
503 | default: | |
504 | if (errcode < 0) | |
505 | errstr = pt_errstr (pt_errcode (errcode)); | |
506 | break; | |
507 | } | |
508 | break; | |
509 | #endif /* defined (HAVE_LIBIPT) */ | |
31fd9caa MM |
510 | } |
511 | ||
512 | ui_out_text (uiout, _("[")); | |
513 | if (is_error) | |
514 | { | |
515 | ui_out_text (uiout, _("decode error (")); | |
516 | ui_out_field_int (uiout, "errcode", errcode); | |
517 | ui_out_text (uiout, _("): ")); | |
518 | } | |
519 | ui_out_text (uiout, errstr); | |
520 | ui_out_text (uiout, _("]\n")); | |
521 | } | |
522 | ||
afedecd3 MM |
523 | /* Print an unsigned int. */ |
524 | ||
525 | static void | |
526 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
527 | { | |
528 | ui_out_field_fmt (uiout, fld, "%u", val); | |
529 | } | |
530 | ||
531 | /* Disassemble a section of the recorded instruction trace. */ | |
532 | ||
533 | static void | |
23a7fe75 | 534 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 535 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
536 | const struct btrace_insn_iterator *begin, |
537 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 MM |
538 | { |
539 | struct gdbarch *gdbarch; | |
23a7fe75 | 540 | struct btrace_insn_iterator it; |
afedecd3 | 541 | |
23a7fe75 MM |
542 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
543 | btrace_insn_number (end)); | |
afedecd3 MM |
544 | |
545 | gdbarch = target_gdbarch (); | |
546 | ||
23a7fe75 | 547 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 548 | { |
23a7fe75 MM |
549 | const struct btrace_insn *insn; |
550 | ||
551 | insn = btrace_insn_get (&it); | |
552 | ||
31fd9caa MM |
553 | /* A NULL instruction indicates a gap in the trace. */ |
554 | if (insn == NULL) | |
555 | { | |
556 | const struct btrace_config *conf; | |
557 | ||
558 | conf = btrace_conf (btinfo); | |
afedecd3 | 559 | |
31fd9caa MM |
560 | /* We have trace so we must have a configuration. */ |
561 | gdb_assert (conf != NULL); | |
562 | ||
563 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
564 | conf->format); | |
565 | } | |
566 | else | |
567 | { | |
da8c46d2 MM |
568 | char prefix[4]; |
569 | ||
570 | /* We may add a speculation prefix later. We use the same space | |
571 | that is used for the pc prefix. */ | |
572 | if ((flags & DISASSEMBLY_OMIT_PC) == 0) | |
573 | strncpy (prefix, pc_prefix (insn->pc), 3); | |
574 | else | |
575 | { | |
576 | prefix[0] = ' '; | |
577 | prefix[1] = ' '; | |
578 | prefix[2] = ' '; | |
579 | } | |
580 | prefix[3] = 0; | |
581 | ||
31fd9caa MM |
582 | /* Print the instruction index. */ |
583 | ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); | |
584 | ui_out_text (uiout, "\t"); | |
585 | ||
da8c46d2 MM |
586 | /* Indicate speculative execution by a leading '?'. */ |
587 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) | |
588 | prefix[0] = '?'; | |
589 | ||
590 | /* Print the prefix; we tell gdb_disassembly below to omit it. */ | |
591 | ui_out_field_fmt (uiout, "prefix", "%s", prefix); | |
592 | ||
31fd9caa MM |
593 | /* Disassembly with '/m' flag may not produce the expected result. |
594 | See PR gdb/11833. */ | |
da8c46d2 MM |
595 | gdb_disassembly (gdbarch, uiout, NULL, flags | DISASSEMBLY_OMIT_PC, |
596 | 1, insn->pc, insn->pc + 1); | |
31fd9caa | 597 | } |
afedecd3 MM |
598 | } |
599 | } | |
600 | ||
601 | /* The to_insn_history method of target record-btrace. */ | |
602 | ||
603 | static void | |
7a6c5609 | 604 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
605 | { |
606 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
607 | struct btrace_insn_history *history; |
608 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
609 | struct cleanup *uiout_cleanup; |
610 | struct ui_out *uiout; | |
23a7fe75 | 611 | unsigned int context, covered; |
afedecd3 MM |
612 | |
613 | uiout = current_uiout; | |
614 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
615 | "insn history"); | |
afedecd3 | 616 | context = abs (size); |
afedecd3 MM |
617 | if (context == 0) |
618 | error (_("Bad record instruction-history-size.")); | |
619 | ||
23a7fe75 MM |
620 | btinfo = require_btrace (); |
621 | history = btinfo->insn_history; | |
622 | if (history == NULL) | |
afedecd3 | 623 | { |
07bbe694 | 624 | struct btrace_insn_iterator *replay; |
afedecd3 | 625 | |
23a7fe75 | 626 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 627 | |
07bbe694 MM |
628 | /* If we're replaying, we start at the replay position. Otherwise, we |
629 | start at the tail of the trace. */ | |
630 | replay = btinfo->replay; | |
631 | if (replay != NULL) | |
632 | begin = *replay; | |
633 | else | |
634 | btrace_insn_end (&begin, btinfo); | |
635 | ||
636 | /* We start from here and expand in the requested direction. Then we | |
637 | expand in the other direction, as well, to fill up any remaining | |
638 | context. */ | |
639 | end = begin; | |
640 | if (size < 0) | |
641 | { | |
642 | /* We want the current position covered, as well. */ | |
643 | covered = btrace_insn_next (&end, 1); | |
644 | covered += btrace_insn_prev (&begin, context - covered); | |
645 | covered += btrace_insn_next (&end, context - covered); | |
646 | } | |
647 | else | |
648 | { | |
649 | covered = btrace_insn_next (&end, context); | |
650 | covered += btrace_insn_prev (&begin, context - covered); | |
651 | } | |
afedecd3 MM |
652 | } |
653 | else | |
654 | { | |
23a7fe75 MM |
655 | begin = history->begin; |
656 | end = history->end; | |
afedecd3 | 657 | |
23a7fe75 MM |
658 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
659 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 660 | |
23a7fe75 MM |
661 | if (size < 0) |
662 | { | |
663 | end = begin; | |
664 | covered = btrace_insn_prev (&begin, context); | |
665 | } | |
666 | else | |
667 | { | |
668 | begin = end; | |
669 | covered = btrace_insn_next (&end, context); | |
670 | } | |
afedecd3 MM |
671 | } |
672 | ||
23a7fe75 | 673 | if (covered > 0) |
31fd9caa | 674 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
675 | else |
676 | { | |
677 | if (size < 0) | |
678 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
679 | else | |
680 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
681 | } | |
afedecd3 | 682 | |
23a7fe75 | 683 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
684 | do_cleanups (uiout_cleanup); |
685 | } | |
686 | ||
687 | /* The to_insn_history_range method of target record-btrace. */ | |
688 | ||
689 | static void | |
4e99c6b7 TT |
690 | record_btrace_insn_history_range (struct target_ops *self, |
691 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
692 | { |
693 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
694 | struct btrace_insn_history *history; |
695 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
696 | struct cleanup *uiout_cleanup; |
697 | struct ui_out *uiout; | |
23a7fe75 MM |
698 | unsigned int low, high; |
699 | int found; | |
afedecd3 MM |
700 | |
701 | uiout = current_uiout; | |
702 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
703 | "insn history"); | |
23a7fe75 MM |
704 | low = from; |
705 | high = to; | |
afedecd3 | 706 | |
23a7fe75 | 707 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
708 | |
709 | /* Check for wrap-arounds. */ | |
23a7fe75 | 710 | if (low != from || high != to) |
afedecd3 MM |
711 | error (_("Bad range.")); |
712 | ||
0688d04e | 713 | if (high < low) |
afedecd3 MM |
714 | error (_("Bad range.")); |
715 | ||
23a7fe75 | 716 | btinfo = require_btrace (); |
afedecd3 | 717 | |
23a7fe75 MM |
718 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
719 | if (found == 0) | |
720 | error (_("Range out of bounds.")); | |
afedecd3 | 721 | |
23a7fe75 MM |
722 | found = btrace_find_insn_by_number (&end, btinfo, high); |
723 | if (found == 0) | |
0688d04e MM |
724 | { |
725 | /* Silently truncate the range. */ | |
726 | btrace_insn_end (&end, btinfo); | |
727 | } | |
728 | else | |
729 | { | |
730 | /* We want both begin and end to be inclusive. */ | |
731 | btrace_insn_next (&end, 1); | |
732 | } | |
afedecd3 | 733 | |
31fd9caa | 734 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 735 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
736 | |
737 | do_cleanups (uiout_cleanup); | |
738 | } | |
739 | ||
740 | /* The to_insn_history_from method of target record-btrace. */ | |
741 | ||
742 | static void | |
9abc3ff3 TT |
743 | record_btrace_insn_history_from (struct target_ops *self, |
744 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
745 | { |
746 | ULONGEST begin, end, context; | |
747 | ||
748 | context = abs (size); | |
0688d04e MM |
749 | if (context == 0) |
750 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
751 | |
752 | if (size < 0) | |
753 | { | |
754 | end = from; | |
755 | ||
756 | if (from < context) | |
757 | begin = 0; | |
758 | else | |
0688d04e | 759 | begin = from - context + 1; |
afedecd3 MM |
760 | } |
761 | else | |
762 | { | |
763 | begin = from; | |
0688d04e | 764 | end = from + context - 1; |
afedecd3 MM |
765 | |
766 | /* Check for wrap-around. */ | |
767 | if (end < begin) | |
768 | end = ULONGEST_MAX; | |
769 | } | |
770 | ||
4e99c6b7 | 771 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
772 | } |
773 | ||
774 | /* Print the instruction number range for a function call history line. */ | |
775 | ||
776 | static void | |
23a7fe75 MM |
777 | btrace_call_history_insn_range (struct ui_out *uiout, |
778 | const struct btrace_function *bfun) | |
afedecd3 | 779 | { |
7acbe133 MM |
780 | unsigned int begin, end, size; |
781 | ||
782 | size = VEC_length (btrace_insn_s, bfun->insn); | |
783 | gdb_assert (size > 0); | |
afedecd3 | 784 | |
23a7fe75 | 785 | begin = bfun->insn_offset; |
7acbe133 | 786 | end = begin + size - 1; |
afedecd3 | 787 | |
23a7fe75 | 788 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 789 | ui_out_text (uiout, ","); |
23a7fe75 | 790 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
791 | } |
792 | ||
ce0dfbea MM |
793 | /* Compute the lowest and highest source line for the instructions in BFUN |
794 | and return them in PBEGIN and PEND. | |
795 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
796 | result from inlining or macro expansion. */ | |
797 | ||
798 | static void | |
799 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
800 | int *pbegin, int *pend) | |
801 | { | |
802 | struct btrace_insn *insn; | |
803 | struct symtab *symtab; | |
804 | struct symbol *sym; | |
805 | unsigned int idx; | |
806 | int begin, end; | |
807 | ||
808 | begin = INT_MAX; | |
809 | end = INT_MIN; | |
810 | ||
811 | sym = bfun->sym; | |
812 | if (sym == NULL) | |
813 | goto out; | |
814 | ||
815 | symtab = symbol_symtab (sym); | |
816 | ||
817 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
818 | { | |
819 | struct symtab_and_line sal; | |
820 | ||
821 | sal = find_pc_line (insn->pc, 0); | |
822 | if (sal.symtab != symtab || sal.line == 0) | |
823 | continue; | |
824 | ||
825 | begin = min (begin, sal.line); | |
826 | end = max (end, sal.line); | |
827 | } | |
828 | ||
829 | out: | |
830 | *pbegin = begin; | |
831 | *pend = end; | |
832 | } | |
833 | ||
afedecd3 MM |
834 | /* Print the source line information for a function call history line. */ |
835 | ||
836 | static void | |
23a7fe75 MM |
837 | btrace_call_history_src_line (struct ui_out *uiout, |
838 | const struct btrace_function *bfun) | |
afedecd3 MM |
839 | { |
840 | struct symbol *sym; | |
23a7fe75 | 841 | int begin, end; |
afedecd3 MM |
842 | |
843 | sym = bfun->sym; | |
844 | if (sym == NULL) | |
845 | return; | |
846 | ||
847 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 848 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 849 | |
ce0dfbea | 850 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 851 | if (end < begin) |
afedecd3 MM |
852 | return; |
853 | ||
854 | ui_out_text (uiout, ":"); | |
23a7fe75 | 855 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 856 | |
23a7fe75 | 857 | if (end == begin) |
afedecd3 MM |
858 | return; |
859 | ||
8710b709 | 860 | ui_out_text (uiout, ","); |
23a7fe75 | 861 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
862 | } |
863 | ||
0b722aec MM |
864 | /* Get the name of a branch trace function. */ |
865 | ||
866 | static const char * | |
867 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
868 | { | |
869 | struct minimal_symbol *msym; | |
870 | struct symbol *sym; | |
871 | ||
872 | if (bfun == NULL) | |
873 | return "??"; | |
874 | ||
875 | msym = bfun->msym; | |
876 | sym = bfun->sym; | |
877 | ||
878 | if (sym != NULL) | |
879 | return SYMBOL_PRINT_NAME (sym); | |
880 | else if (msym != NULL) | |
efd66ac6 | 881 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
882 | else |
883 | return "??"; | |
884 | } | |
885 | ||
afedecd3 MM |
886 | /* Disassemble a section of the recorded function trace. */ |
887 | ||
888 | static void | |
23a7fe75 | 889 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 890 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
891 | const struct btrace_call_iterator *begin, |
892 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
893 | enum record_print_flag flags) |
894 | { | |
23a7fe75 | 895 | struct btrace_call_iterator it; |
afedecd3 | 896 | |
23a7fe75 MM |
897 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
898 | btrace_call_number (end)); | |
afedecd3 | 899 | |
23a7fe75 | 900 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 901 | { |
23a7fe75 MM |
902 | const struct btrace_function *bfun; |
903 | struct minimal_symbol *msym; | |
904 | struct symbol *sym; | |
905 | ||
906 | bfun = btrace_call_get (&it); | |
23a7fe75 | 907 | sym = bfun->sym; |
0b722aec | 908 | msym = bfun->msym; |
23a7fe75 | 909 | |
afedecd3 | 910 | /* Print the function index. */ |
23a7fe75 | 911 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
912 | ui_out_text (uiout, "\t"); |
913 | ||
31fd9caa MM |
914 | /* Indicate gaps in the trace. */ |
915 | if (bfun->errcode != 0) | |
916 | { | |
917 | const struct btrace_config *conf; | |
918 | ||
919 | conf = btrace_conf (btinfo); | |
920 | ||
921 | /* We have trace so we must have a configuration. */ | |
922 | gdb_assert (conf != NULL); | |
923 | ||
924 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
925 | ||
926 | continue; | |
927 | } | |
928 | ||
8710b709 MM |
929 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
930 | { | |
931 | int level = bfun->level + btinfo->level, i; | |
932 | ||
933 | for (i = 0; i < level; ++i) | |
934 | ui_out_text (uiout, " "); | |
935 | } | |
936 | ||
937 | if (sym != NULL) | |
938 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
939 | else if (msym != NULL) | |
efd66ac6 | 940 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
941 | else if (!ui_out_is_mi_like_p (uiout)) |
942 | ui_out_field_string (uiout, "function", "??"); | |
943 | ||
1e038f67 | 944 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 945 | { |
8710b709 | 946 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 947 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
948 | } |
949 | ||
1e038f67 | 950 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 951 | { |
8710b709 | 952 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 953 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
954 | } |
955 | ||
afedecd3 MM |
956 | ui_out_text (uiout, "\n"); |
957 | } | |
958 | } | |
959 | ||
960 | /* The to_call_history method of target record-btrace. */ | |
961 | ||
962 | static void | |
5df2fcba | 963 | record_btrace_call_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
964 | { |
965 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
966 | struct btrace_call_history *history; |
967 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
968 | struct cleanup *uiout_cleanup; |
969 | struct ui_out *uiout; | |
23a7fe75 | 970 | unsigned int context, covered; |
afedecd3 MM |
971 | |
972 | uiout = current_uiout; | |
973 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
974 | "insn history"); | |
afedecd3 | 975 | context = abs (size); |
afedecd3 MM |
976 | if (context == 0) |
977 | error (_("Bad record function-call-history-size.")); | |
978 | ||
23a7fe75 MM |
979 | btinfo = require_btrace (); |
980 | history = btinfo->call_history; | |
981 | if (history == NULL) | |
afedecd3 | 982 | { |
07bbe694 | 983 | struct btrace_insn_iterator *replay; |
afedecd3 | 984 | |
23a7fe75 | 985 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 986 | |
07bbe694 MM |
987 | /* If we're replaying, we start at the replay position. Otherwise, we |
988 | start at the tail of the trace. */ | |
989 | replay = btinfo->replay; | |
990 | if (replay != NULL) | |
991 | { | |
992 | begin.function = replay->function; | |
993 | begin.btinfo = btinfo; | |
994 | } | |
995 | else | |
996 | btrace_call_end (&begin, btinfo); | |
997 | ||
998 | /* We start from here and expand in the requested direction. Then we | |
999 | expand in the other direction, as well, to fill up any remaining | |
1000 | context. */ | |
1001 | end = begin; | |
1002 | if (size < 0) | |
1003 | { | |
1004 | /* We want the current position covered, as well. */ | |
1005 | covered = btrace_call_next (&end, 1); | |
1006 | covered += btrace_call_prev (&begin, context - covered); | |
1007 | covered += btrace_call_next (&end, context - covered); | |
1008 | } | |
1009 | else | |
1010 | { | |
1011 | covered = btrace_call_next (&end, context); | |
1012 | covered += btrace_call_prev (&begin, context- covered); | |
1013 | } | |
afedecd3 MM |
1014 | } |
1015 | else | |
1016 | { | |
23a7fe75 MM |
1017 | begin = history->begin; |
1018 | end = history->end; | |
afedecd3 | 1019 | |
23a7fe75 MM |
1020 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
1021 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 1022 | |
23a7fe75 MM |
1023 | if (size < 0) |
1024 | { | |
1025 | end = begin; | |
1026 | covered = btrace_call_prev (&begin, context); | |
1027 | } | |
1028 | else | |
1029 | { | |
1030 | begin = end; | |
1031 | covered = btrace_call_next (&end, context); | |
1032 | } | |
afedecd3 MM |
1033 | } |
1034 | ||
23a7fe75 | 1035 | if (covered > 0) |
8710b709 | 1036 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1037 | else |
1038 | { | |
1039 | if (size < 0) | |
1040 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
1041 | else | |
1042 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
1043 | } | |
afedecd3 | 1044 | |
23a7fe75 | 1045 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1046 | do_cleanups (uiout_cleanup); |
1047 | } | |
1048 | ||
1049 | /* The to_call_history_range method of target record-btrace. */ | |
1050 | ||
1051 | static void | |
f0d960ea TT |
1052 | record_btrace_call_history_range (struct target_ops *self, |
1053 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
1054 | { |
1055 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1056 | struct btrace_call_history *history; |
1057 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1058 | struct cleanup *uiout_cleanup; |
1059 | struct ui_out *uiout; | |
23a7fe75 MM |
1060 | unsigned int low, high; |
1061 | int found; | |
afedecd3 MM |
1062 | |
1063 | uiout = current_uiout; | |
1064 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1065 | "func history"); | |
23a7fe75 MM |
1066 | low = from; |
1067 | high = to; | |
afedecd3 | 1068 | |
23a7fe75 | 1069 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
1070 | |
1071 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1072 | if (low != from || high != to) |
afedecd3 MM |
1073 | error (_("Bad range.")); |
1074 | ||
0688d04e | 1075 | if (high < low) |
afedecd3 MM |
1076 | error (_("Bad range.")); |
1077 | ||
23a7fe75 | 1078 | btinfo = require_btrace (); |
afedecd3 | 1079 | |
23a7fe75 MM |
1080 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1081 | if (found == 0) | |
1082 | error (_("Range out of bounds.")); | |
afedecd3 | 1083 | |
23a7fe75 MM |
1084 | found = btrace_find_call_by_number (&end, btinfo, high); |
1085 | if (found == 0) | |
0688d04e MM |
1086 | { |
1087 | /* Silently truncate the range. */ | |
1088 | btrace_call_end (&end, btinfo); | |
1089 | } | |
1090 | else | |
1091 | { | |
1092 | /* We want both begin and end to be inclusive. */ | |
1093 | btrace_call_next (&end, 1); | |
1094 | } | |
afedecd3 | 1095 | |
8710b709 | 1096 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1097 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1098 | |
1099 | do_cleanups (uiout_cleanup); | |
1100 | } | |
1101 | ||
1102 | /* The to_call_history_from method of target record-btrace. */ | |
1103 | ||
1104 | static void | |
ec0aea04 TT |
1105 | record_btrace_call_history_from (struct target_ops *self, |
1106 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
1107 | { |
1108 | ULONGEST begin, end, context; | |
1109 | ||
1110 | context = abs (size); | |
0688d04e MM |
1111 | if (context == 0) |
1112 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1113 | |
1114 | if (size < 0) | |
1115 | { | |
1116 | end = from; | |
1117 | ||
1118 | if (from < context) | |
1119 | begin = 0; | |
1120 | else | |
0688d04e | 1121 | begin = from - context + 1; |
afedecd3 MM |
1122 | } |
1123 | else | |
1124 | { | |
1125 | begin = from; | |
0688d04e | 1126 | end = from + context - 1; |
afedecd3 MM |
1127 | |
1128 | /* Check for wrap-around. */ | |
1129 | if (end < begin) | |
1130 | end = ULONGEST_MAX; | |
1131 | } | |
1132 | ||
f0d960ea | 1133 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1134 | } |
1135 | ||
07bbe694 MM |
1136 | /* The to_record_is_replaying method of target record-btrace. */ |
1137 | ||
1138 | static int | |
a52eab48 | 1139 | record_btrace_is_replaying (struct target_ops *self, ptid_t ptid) |
07bbe694 MM |
1140 | { |
1141 | struct thread_info *tp; | |
1142 | ||
034f788c | 1143 | ALL_NON_EXITED_THREADS (tp) |
a52eab48 | 1144 | if (ptid_match (tp->ptid, ptid) && btrace_is_replaying (tp)) |
07bbe694 MM |
1145 | return 1; |
1146 | ||
1147 | return 0; | |
1148 | } | |
1149 | ||
633785ff MM |
1150 | /* The to_xfer_partial method of target record-btrace. */ |
1151 | ||
9b409511 | 1152 | static enum target_xfer_status |
633785ff MM |
1153 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1154 | const char *annex, gdb_byte *readbuf, | |
1155 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1156 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1157 | { |
1158 | struct target_ops *t; | |
1159 | ||
1160 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1161 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1162 | && !record_btrace_generating_corefile |
a52eab48 | 1163 | && record_btrace_is_replaying (ops, minus_one_ptid)) |
633785ff MM |
1164 | { |
1165 | switch (object) | |
1166 | { | |
1167 | case TARGET_OBJECT_MEMORY: | |
1168 | { | |
1169 | struct target_section *section; | |
1170 | ||
1171 | /* We do not allow writing memory in general. */ | |
1172 | if (writebuf != NULL) | |
9b409511 YQ |
1173 | { |
1174 | *xfered_len = len; | |
bc113b4e | 1175 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1176 | } |
633785ff MM |
1177 | |
1178 | /* We allow reading readonly memory. */ | |
1179 | section = target_section_by_addr (ops, offset); | |
1180 | if (section != NULL) | |
1181 | { | |
1182 | /* Check if the section we found is readonly. */ | |
1183 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1184 | section->the_bfd_section) | |
1185 | & SEC_READONLY) != 0) | |
1186 | { | |
1187 | /* Truncate the request to fit into this section. */ | |
1188 | len = min (len, section->endaddr - offset); | |
1189 | break; | |
1190 | } | |
1191 | } | |
1192 | ||
9b409511 | 1193 | *xfered_len = len; |
bc113b4e | 1194 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1195 | } |
1196 | } | |
1197 | } | |
1198 | ||
1199 | /* Forward the request. */ | |
e75fdfca TT |
1200 | ops = ops->beneath; |
1201 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1202 | offset, len, xfered_len); | |
633785ff MM |
1203 | } |
1204 | ||
1205 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1206 | ||
1207 | static int | |
1208 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1209 | struct gdbarch *gdbarch, | |
1210 | struct bp_target_info *bp_tgt) | |
1211 | { | |
67b5c0c1 MM |
1212 | const char *old; |
1213 | int ret; | |
633785ff MM |
1214 | |
1215 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1216 | duration of this function. */ | |
67b5c0c1 MM |
1217 | old = replay_memory_access; |
1218 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1219 | |
1220 | ret = 0; | |
492d29ea PA |
1221 | TRY |
1222 | { | |
1223 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1224 | } | |
492d29ea PA |
1225 | CATCH (except, RETURN_MASK_ALL) |
1226 | { | |
6c63c96a | 1227 | replay_memory_access = old; |
492d29ea PA |
1228 | throw_exception (except); |
1229 | } | |
1230 | END_CATCH | |
6c63c96a | 1231 | replay_memory_access = old; |
633785ff MM |
1232 | |
1233 | return ret; | |
1234 | } | |
1235 | ||
1236 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1237 | ||
1238 | static int | |
1239 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1240 | struct gdbarch *gdbarch, | |
1241 | struct bp_target_info *bp_tgt) | |
1242 | { | |
67b5c0c1 MM |
1243 | const char *old; |
1244 | int ret; | |
633785ff MM |
1245 | |
1246 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1247 | duration of this function. */ | |
67b5c0c1 MM |
1248 | old = replay_memory_access; |
1249 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1250 | |
1251 | ret = 0; | |
492d29ea PA |
1252 | TRY |
1253 | { | |
1254 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1255 | } | |
492d29ea PA |
1256 | CATCH (except, RETURN_MASK_ALL) |
1257 | { | |
6c63c96a | 1258 | replay_memory_access = old; |
492d29ea PA |
1259 | throw_exception (except); |
1260 | } | |
1261 | END_CATCH | |
6c63c96a | 1262 | replay_memory_access = old; |
633785ff MM |
1263 | |
1264 | return ret; | |
1265 | } | |
1266 | ||
1f3ef581 MM |
1267 | /* The to_fetch_registers method of target record-btrace. */ |
1268 | ||
1269 | static void | |
1270 | record_btrace_fetch_registers (struct target_ops *ops, | |
1271 | struct regcache *regcache, int regno) | |
1272 | { | |
1273 | struct btrace_insn_iterator *replay; | |
1274 | struct thread_info *tp; | |
1275 | ||
1276 | tp = find_thread_ptid (inferior_ptid); | |
1277 | gdb_assert (tp != NULL); | |
1278 | ||
1279 | replay = tp->btrace.replay; | |
aef92902 | 1280 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1281 | { |
1282 | const struct btrace_insn *insn; | |
1283 | struct gdbarch *gdbarch; | |
1284 | int pcreg; | |
1285 | ||
1286 | gdbarch = get_regcache_arch (regcache); | |
1287 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1288 | if (pcreg < 0) | |
1289 | return; | |
1290 | ||
1291 | /* We can only provide the PC register. */ | |
1292 | if (regno >= 0 && regno != pcreg) | |
1293 | return; | |
1294 | ||
1295 | insn = btrace_insn_get (replay); | |
1296 | gdb_assert (insn != NULL); | |
1297 | ||
1298 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1299 | } | |
1300 | else | |
1301 | { | |
e75fdfca | 1302 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1303 | |
e75fdfca | 1304 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1305 | } |
1306 | } | |
1307 | ||
1308 | /* The to_store_registers method of target record-btrace. */ | |
1309 | ||
1310 | static void | |
1311 | record_btrace_store_registers (struct target_ops *ops, | |
1312 | struct regcache *regcache, int regno) | |
1313 | { | |
1314 | struct target_ops *t; | |
1315 | ||
a52eab48 MM |
1316 | if (!record_btrace_generating_corefile |
1317 | && record_btrace_is_replaying (ops, minus_one_ptid)) | |
1f3ef581 MM |
1318 | error (_("This record target does not allow writing registers.")); |
1319 | ||
1320 | gdb_assert (may_write_registers != 0); | |
1321 | ||
e75fdfca TT |
1322 | t = ops->beneath; |
1323 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1324 | } |
1325 | ||
1326 | /* The to_prepare_to_store method of target record-btrace. */ | |
1327 | ||
1328 | static void | |
1329 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1330 | struct regcache *regcache) | |
1331 | { | |
1332 | struct target_ops *t; | |
1333 | ||
a52eab48 MM |
1334 | if (!record_btrace_generating_corefile |
1335 | && record_btrace_is_replaying (ops, minus_one_ptid)) | |
1f3ef581 MM |
1336 | return; |
1337 | ||
e75fdfca TT |
1338 | t = ops->beneath; |
1339 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1340 | } |
1341 | ||
0b722aec MM |
1342 | /* The branch trace frame cache. */ |
1343 | ||
1344 | struct btrace_frame_cache | |
1345 | { | |
1346 | /* The thread. */ | |
1347 | struct thread_info *tp; | |
1348 | ||
1349 | /* The frame info. */ | |
1350 | struct frame_info *frame; | |
1351 | ||
1352 | /* The branch trace function segment. */ | |
1353 | const struct btrace_function *bfun; | |
1354 | }; | |
1355 | ||
1356 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1357 | ||
1358 | static htab_t bfcache; | |
1359 | ||
1360 | /* hash_f for htab_create_alloc of bfcache. */ | |
1361 | ||
1362 | static hashval_t | |
1363 | bfcache_hash (const void *arg) | |
1364 | { | |
1365 | const struct btrace_frame_cache *cache = arg; | |
1366 | ||
1367 | return htab_hash_pointer (cache->frame); | |
1368 | } | |
1369 | ||
1370 | /* eq_f for htab_create_alloc of bfcache. */ | |
1371 | ||
1372 | static int | |
1373 | bfcache_eq (const void *arg1, const void *arg2) | |
1374 | { | |
1375 | const struct btrace_frame_cache *cache1 = arg1; | |
1376 | const struct btrace_frame_cache *cache2 = arg2; | |
1377 | ||
1378 | return cache1->frame == cache2->frame; | |
1379 | } | |
1380 | ||
1381 | /* Create a new btrace frame cache. */ | |
1382 | ||
1383 | static struct btrace_frame_cache * | |
1384 | bfcache_new (struct frame_info *frame) | |
1385 | { | |
1386 | struct btrace_frame_cache *cache; | |
1387 | void **slot; | |
1388 | ||
1389 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1390 | cache->frame = frame; | |
1391 | ||
1392 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1393 | gdb_assert (*slot == NULL); | |
1394 | *slot = cache; | |
1395 | ||
1396 | return cache; | |
1397 | } | |
1398 | ||
1399 | /* Extract the branch trace function from a branch trace frame. */ | |
1400 | ||
1401 | static const struct btrace_function * | |
1402 | btrace_get_frame_function (struct frame_info *frame) | |
1403 | { | |
1404 | const struct btrace_frame_cache *cache; | |
1405 | const struct btrace_function *bfun; | |
1406 | struct btrace_frame_cache pattern; | |
1407 | void **slot; | |
1408 | ||
1409 | pattern.frame = frame; | |
1410 | ||
1411 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1412 | if (slot == NULL) | |
1413 | return NULL; | |
1414 | ||
1415 | cache = *slot; | |
1416 | return cache->bfun; | |
1417 | } | |
1418 | ||
cecac1ab MM |
1419 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1420 | ||
1421 | static enum unwind_stop_reason | |
1422 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1423 | void **this_cache) | |
1424 | { | |
0b722aec MM |
1425 | const struct btrace_frame_cache *cache; |
1426 | const struct btrace_function *bfun; | |
1427 | ||
1428 | cache = *this_cache; | |
1429 | bfun = cache->bfun; | |
1430 | gdb_assert (bfun != NULL); | |
1431 | ||
1432 | if (bfun->up == NULL) | |
1433 | return UNWIND_UNAVAILABLE; | |
1434 | ||
1435 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1436 | } |
1437 | ||
1438 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1439 | ||
1440 | static void | |
1441 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1442 | struct frame_id *this_id) | |
1443 | { | |
0b722aec MM |
1444 | const struct btrace_frame_cache *cache; |
1445 | const struct btrace_function *bfun; | |
1446 | CORE_ADDR code, special; | |
1447 | ||
1448 | cache = *this_cache; | |
1449 | ||
1450 | bfun = cache->bfun; | |
1451 | gdb_assert (bfun != NULL); | |
1452 | ||
1453 | while (bfun->segment.prev != NULL) | |
1454 | bfun = bfun->segment.prev; | |
1455 | ||
1456 | code = get_frame_func (this_frame); | |
1457 | special = bfun->number; | |
1458 | ||
1459 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1460 | ||
1461 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1462 | btrace_get_bfun_name (cache->bfun), | |
1463 | core_addr_to_string_nz (this_id->code_addr), | |
1464 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1465 | } |
1466 | ||
1467 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1468 | ||
1469 | static struct value * | |
1470 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1471 | void **this_cache, | |
1472 | int regnum) | |
1473 | { | |
0b722aec MM |
1474 | const struct btrace_frame_cache *cache; |
1475 | const struct btrace_function *bfun, *caller; | |
1476 | const struct btrace_insn *insn; | |
1477 | struct gdbarch *gdbarch; | |
1478 | CORE_ADDR pc; | |
1479 | int pcreg; | |
1480 | ||
1481 | gdbarch = get_frame_arch (this_frame); | |
1482 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1483 | if (pcreg < 0 || regnum != pcreg) | |
1484 | throw_error (NOT_AVAILABLE_ERROR, | |
1485 | _("Registers are not available in btrace record history")); | |
1486 | ||
1487 | cache = *this_cache; | |
1488 | bfun = cache->bfun; | |
1489 | gdb_assert (bfun != NULL); | |
1490 | ||
1491 | caller = bfun->up; | |
1492 | if (caller == NULL) | |
1493 | throw_error (NOT_AVAILABLE_ERROR, | |
1494 | _("No caller in btrace record history")); | |
1495 | ||
1496 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1497 | { | |
1498 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1499 | pc = insn->pc; | |
1500 | } | |
1501 | else | |
1502 | { | |
1503 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1504 | pc = insn->pc; | |
1505 | ||
1506 | pc += gdb_insn_length (gdbarch, pc); | |
1507 | } | |
1508 | ||
1509 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1510 | btrace_get_bfun_name (bfun), bfun->level, | |
1511 | core_addr_to_string_nz (pc)); | |
1512 | ||
1513 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1514 | } |
1515 | ||
1516 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1517 | ||
1518 | static int | |
1519 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1520 | struct frame_info *this_frame, | |
1521 | void **this_cache) | |
1522 | { | |
0b722aec MM |
1523 | const struct btrace_function *bfun; |
1524 | struct btrace_frame_cache *cache; | |
cecac1ab | 1525 | struct thread_info *tp; |
0b722aec | 1526 | struct frame_info *next; |
cecac1ab MM |
1527 | |
1528 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1529 | tp = find_thread_ptid (inferior_ptid); | |
1530 | gdb_assert (tp != NULL); | |
1531 | ||
0b722aec MM |
1532 | bfun = NULL; |
1533 | next = get_next_frame (this_frame); | |
1534 | if (next == NULL) | |
1535 | { | |
1536 | const struct btrace_insn_iterator *replay; | |
1537 | ||
1538 | replay = tp->btrace.replay; | |
1539 | if (replay != NULL) | |
1540 | bfun = replay->function; | |
1541 | } | |
1542 | else | |
1543 | { | |
1544 | const struct btrace_function *callee; | |
1545 | ||
1546 | callee = btrace_get_frame_function (next); | |
1547 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1548 | bfun = callee->up; | |
1549 | } | |
1550 | ||
1551 | if (bfun == NULL) | |
1552 | return 0; | |
1553 | ||
1554 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1555 | btrace_get_bfun_name (bfun), bfun->level); | |
1556 | ||
1557 | /* This is our frame. Initialize the frame cache. */ | |
1558 | cache = bfcache_new (this_frame); | |
1559 | cache->tp = tp; | |
1560 | cache->bfun = bfun; | |
1561 | ||
1562 | *this_cache = cache; | |
1563 | return 1; | |
1564 | } | |
1565 | ||
1566 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1567 | ||
1568 | static int | |
1569 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1570 | struct frame_info *this_frame, | |
1571 | void **this_cache) | |
1572 | { | |
1573 | const struct btrace_function *bfun, *callee; | |
1574 | struct btrace_frame_cache *cache; | |
1575 | struct frame_info *next; | |
1576 | ||
1577 | next = get_next_frame (this_frame); | |
1578 | if (next == NULL) | |
1579 | return 0; | |
1580 | ||
1581 | callee = btrace_get_frame_function (next); | |
1582 | if (callee == NULL) | |
1583 | return 0; | |
1584 | ||
1585 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1586 | return 0; | |
1587 | ||
1588 | bfun = callee->up; | |
1589 | if (bfun == NULL) | |
1590 | return 0; | |
1591 | ||
1592 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1593 | btrace_get_bfun_name (bfun), bfun->level); | |
1594 | ||
1595 | /* This is our frame. Initialize the frame cache. */ | |
1596 | cache = bfcache_new (this_frame); | |
1597 | cache->tp = find_thread_ptid (inferior_ptid); | |
1598 | cache->bfun = bfun; | |
1599 | ||
1600 | *this_cache = cache; | |
1601 | return 1; | |
1602 | } | |
1603 | ||
1604 | static void | |
1605 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1606 | { | |
1607 | struct btrace_frame_cache *cache; | |
1608 | void **slot; | |
1609 | ||
1610 | cache = this_cache; | |
1611 | ||
1612 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1613 | gdb_assert (slot != NULL); | |
1614 | ||
1615 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1616 | } |
1617 | ||
1618 | /* btrace recording does not store previous memory content, neither the stack | |
1619 | frames content. Any unwinding would return errorneous results as the stack | |
1620 | contents no longer matches the changed PC value restored from history. | |
1621 | Therefore this unwinder reports any possibly unwound registers as | |
1622 | <unavailable>. */ | |
1623 | ||
0b722aec | 1624 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1625 | { |
1626 | NORMAL_FRAME, | |
1627 | record_btrace_frame_unwind_stop_reason, | |
1628 | record_btrace_frame_this_id, | |
1629 | record_btrace_frame_prev_register, | |
1630 | NULL, | |
0b722aec MM |
1631 | record_btrace_frame_sniffer, |
1632 | record_btrace_frame_dealloc_cache | |
1633 | }; | |
1634 | ||
1635 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1636 | { | |
1637 | TAILCALL_FRAME, | |
1638 | record_btrace_frame_unwind_stop_reason, | |
1639 | record_btrace_frame_this_id, | |
1640 | record_btrace_frame_prev_register, | |
1641 | NULL, | |
1642 | record_btrace_tailcall_frame_sniffer, | |
1643 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1644 | }; |
b2f4cfde | 1645 | |
ac01945b TT |
1646 | /* Implement the to_get_unwinder method. */ |
1647 | ||
1648 | static const struct frame_unwind * | |
1649 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1650 | { | |
1651 | return &record_btrace_frame_unwind; | |
1652 | } | |
1653 | ||
1654 | /* Implement the to_get_tailcall_unwinder method. */ | |
1655 | ||
1656 | static const struct frame_unwind * | |
1657 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1658 | { | |
1659 | return &record_btrace_tailcall_frame_unwind; | |
1660 | } | |
1661 | ||
987e68b1 MM |
1662 | /* Return a human-readable string for FLAG. */ |
1663 | ||
1664 | static const char * | |
1665 | btrace_thread_flag_to_str (enum btrace_thread_flag flag) | |
1666 | { | |
1667 | switch (flag) | |
1668 | { | |
1669 | case BTHR_STEP: | |
1670 | return "step"; | |
1671 | ||
1672 | case BTHR_RSTEP: | |
1673 | return "reverse-step"; | |
1674 | ||
1675 | case BTHR_CONT: | |
1676 | return "cont"; | |
1677 | ||
1678 | case BTHR_RCONT: | |
1679 | return "reverse-cont"; | |
1680 | ||
1681 | case BTHR_STOP: | |
1682 | return "stop"; | |
1683 | } | |
1684 | ||
1685 | return "<invalid>"; | |
1686 | } | |
1687 | ||
52834460 MM |
1688 | /* Indicate that TP should be resumed according to FLAG. */ |
1689 | ||
1690 | static void | |
1691 | record_btrace_resume_thread (struct thread_info *tp, | |
1692 | enum btrace_thread_flag flag) | |
1693 | { | |
1694 | struct btrace_thread_info *btinfo; | |
1695 | ||
987e68b1 MM |
1696 | DEBUG ("resuming thread %d (%s): %x (%s)", tp->num, |
1697 | target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag)); | |
52834460 MM |
1698 | |
1699 | btinfo = &tp->btrace; | |
1700 | ||
52834460 MM |
1701 | /* Fetch the latest branch trace. */ |
1702 | btrace_fetch (tp); | |
1703 | ||
0ca912df MM |
1704 | /* A resume request overwrites a preceding resume or stop request. */ |
1705 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1706 | btinfo->flags |= flag; |
1707 | } | |
1708 | ||
ec71cc2f MM |
1709 | /* Get the current frame for TP. */ |
1710 | ||
1711 | static struct frame_info * | |
1712 | get_thread_current_frame (struct thread_info *tp) | |
1713 | { | |
1714 | struct frame_info *frame; | |
1715 | ptid_t old_inferior_ptid; | |
1716 | int executing; | |
1717 | ||
1718 | /* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */ | |
1719 | old_inferior_ptid = inferior_ptid; | |
1720 | inferior_ptid = tp->ptid; | |
1721 | ||
1722 | /* Clear the executing flag to allow changes to the current frame. | |
1723 | We are not actually running, yet. We just started a reverse execution | |
1724 | command or a record goto command. | |
1725 | For the latter, EXECUTING is false and this has no effect. | |
1726 | For the former, EXECUTING is true and we're in to_wait, about to | |
1727 | move the thread. Since we need to recompute the stack, we temporarily | |
1728 | set EXECUTING to flase. */ | |
1729 | executing = is_executing (inferior_ptid); | |
1730 | set_executing (inferior_ptid, 0); | |
1731 | ||
1732 | frame = NULL; | |
1733 | TRY | |
1734 | { | |
1735 | frame = get_current_frame (); | |
1736 | } | |
1737 | CATCH (except, RETURN_MASK_ALL) | |
1738 | { | |
1739 | /* Restore the previous execution state. */ | |
1740 | set_executing (inferior_ptid, executing); | |
1741 | ||
1742 | /* Restore the previous inferior_ptid. */ | |
1743 | inferior_ptid = old_inferior_ptid; | |
1744 | ||
1745 | throw_exception (except); | |
1746 | } | |
1747 | END_CATCH | |
1748 | ||
1749 | /* Restore the previous execution state. */ | |
1750 | set_executing (inferior_ptid, executing); | |
1751 | ||
1752 | /* Restore the previous inferior_ptid. */ | |
1753 | inferior_ptid = old_inferior_ptid; | |
1754 | ||
1755 | return frame; | |
1756 | } | |
1757 | ||
52834460 MM |
1758 | /* Start replaying a thread. */ |
1759 | ||
1760 | static struct btrace_insn_iterator * | |
1761 | record_btrace_start_replaying (struct thread_info *tp) | |
1762 | { | |
52834460 MM |
1763 | struct btrace_insn_iterator *replay; |
1764 | struct btrace_thread_info *btinfo; | |
52834460 MM |
1765 | |
1766 | btinfo = &tp->btrace; | |
1767 | replay = NULL; | |
1768 | ||
1769 | /* We can't start replaying without trace. */ | |
1770 | if (btinfo->begin == NULL) | |
1771 | return NULL; | |
1772 | ||
52834460 MM |
1773 | /* GDB stores the current frame_id when stepping in order to detects steps |
1774 | into subroutines. | |
1775 | Since frames are computed differently when we're replaying, we need to | |
1776 | recompute those stored frames and fix them up so we can still detect | |
1777 | subroutines after we started replaying. */ | |
492d29ea | 1778 | TRY |
52834460 MM |
1779 | { |
1780 | struct frame_info *frame; | |
1781 | struct frame_id frame_id; | |
1782 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1783 | ||
1784 | /* The current frame without replaying - computed via normal unwind. */ | |
ec71cc2f | 1785 | frame = get_thread_current_frame (tp); |
52834460 MM |
1786 | frame_id = get_frame_id (frame); |
1787 | ||
1788 | /* Check if we need to update any stepping-related frame id's. */ | |
1789 | upd_step_frame_id = frame_id_eq (frame_id, | |
1790 | tp->control.step_frame_id); | |
1791 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1792 | tp->control.step_stack_frame_id); | |
1793 | ||
1794 | /* We start replaying at the end of the branch trace. This corresponds | |
1795 | to the current instruction. */ | |
8d749320 | 1796 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
1797 | btrace_insn_end (replay, btinfo); |
1798 | ||
31fd9caa MM |
1799 | /* Skip gaps at the end of the trace. */ |
1800 | while (btrace_insn_get (replay) == NULL) | |
1801 | { | |
1802 | unsigned int steps; | |
1803 | ||
1804 | steps = btrace_insn_prev (replay, 1); | |
1805 | if (steps == 0) | |
1806 | error (_("No trace.")); | |
1807 | } | |
1808 | ||
52834460 MM |
1809 | /* We're not replaying, yet. */ |
1810 | gdb_assert (btinfo->replay == NULL); | |
1811 | btinfo->replay = replay; | |
1812 | ||
1813 | /* Make sure we're not using any stale registers. */ | |
1814 | registers_changed_ptid (tp->ptid); | |
1815 | ||
1816 | /* The current frame with replaying - computed via btrace unwind. */ | |
ec71cc2f | 1817 | frame = get_thread_current_frame (tp); |
52834460 MM |
1818 | frame_id = get_frame_id (frame); |
1819 | ||
1820 | /* Replace stepping related frames where necessary. */ | |
1821 | if (upd_step_frame_id) | |
1822 | tp->control.step_frame_id = frame_id; | |
1823 | if (upd_step_stack_frame_id) | |
1824 | tp->control.step_stack_frame_id = frame_id; | |
1825 | } | |
492d29ea | 1826 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
1827 | { |
1828 | xfree (btinfo->replay); | |
1829 | btinfo->replay = NULL; | |
1830 | ||
1831 | registers_changed_ptid (tp->ptid); | |
1832 | ||
1833 | throw_exception (except); | |
1834 | } | |
492d29ea | 1835 | END_CATCH |
52834460 MM |
1836 | |
1837 | return replay; | |
1838 | } | |
1839 | ||
1840 | /* Stop replaying a thread. */ | |
1841 | ||
1842 | static void | |
1843 | record_btrace_stop_replaying (struct thread_info *tp) | |
1844 | { | |
1845 | struct btrace_thread_info *btinfo; | |
1846 | ||
1847 | btinfo = &tp->btrace; | |
1848 | ||
1849 | xfree (btinfo->replay); | |
1850 | btinfo->replay = NULL; | |
1851 | ||
1852 | /* Make sure we're not leaving any stale registers. */ | |
1853 | registers_changed_ptid (tp->ptid); | |
1854 | } | |
1855 | ||
e3cfc1c7 MM |
1856 | /* Stop replaying TP if it is at the end of its execution history. */ |
1857 | ||
1858 | static void | |
1859 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
1860 | { | |
1861 | struct btrace_insn_iterator *replay, end; | |
1862 | struct btrace_thread_info *btinfo; | |
1863 | ||
1864 | btinfo = &tp->btrace; | |
1865 | replay = btinfo->replay; | |
1866 | ||
1867 | if (replay == NULL) | |
1868 | return; | |
1869 | ||
1870 | btrace_insn_end (&end, btinfo); | |
1871 | ||
1872 | if (btrace_insn_cmp (replay, &end) == 0) | |
1873 | record_btrace_stop_replaying (tp); | |
1874 | } | |
1875 | ||
b2f4cfde MM |
1876 | /* The to_resume method of target record-btrace. */ |
1877 | ||
1878 | static void | |
1879 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1880 | enum gdb_signal signal) | |
1881 | { | |
0ca912df | 1882 | struct thread_info *tp; |
52834460 | 1883 | enum btrace_thread_flag flag; |
0ca912df | 1884 | ptid_t orig_ptid; |
52834460 | 1885 | |
987e68b1 MM |
1886 | DEBUG ("resume %s: %s%s", target_pid_to_str (ptid), |
1887 | execution_direction == EXEC_REVERSE ? "reverse-" : "", | |
1888 | step ? "step" : "cont"); | |
52834460 | 1889 | |
0ca912df MM |
1890 | orig_ptid = ptid; |
1891 | ||
1892 | /* Store the execution direction of the last resume. | |
1893 | ||
1894 | If there is more than one to_resume call, we have to rely on infrun | |
1895 | to not change the execution direction in-between. */ | |
70ad5bff MM |
1896 | record_btrace_resume_exec_dir = execution_direction; |
1897 | ||
0ca912df MM |
1898 | /* For all-stop targets... */ |
1899 | if (!target_is_non_stop_p ()) | |
1900 | { | |
1901 | /* ...we pick the current thread when asked to resume an entire process | |
1902 | or everything. */ | |
1903 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1904 | ptid = inferior_ptid; | |
1905 | ||
1906 | tp = find_thread_ptid (ptid); | |
1907 | if (tp == NULL) | |
1908 | error (_("Cannot find thread to resume.")); | |
1909 | ||
1910 | /* ...and we stop replaying other threads if the thread to resume is not | |
1911 | replaying. */ | |
1912 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
1913 | ALL_NON_EXITED_THREADS (tp) | |
1914 | record_btrace_stop_replaying (tp); | |
1915 | } | |
52834460 | 1916 | |
0ca912df | 1917 | /* As long as we're not replaying, just forward the request. |
52834460 | 1918 | |
0ca912df MM |
1919 | For non-stop targets this means that no thread is replaying. In order to |
1920 | make progress, we may need to explicitly move replaying threads to the end | |
1921 | of their execution history. */ | |
a52eab48 MM |
1922 | if ((execution_direction != EXEC_REVERSE) |
1923 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
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 | ||
a6b5be76 MM |
2243 | /* Announce further events if necessary. */ |
2244 | ||
2245 | static void | |
2246 | record_btrace_maybe_mark_async_event (const VEC (tp_t) *moving, | |
2247 | const VEC (tp_t) *no_history) | |
2248 | { | |
2249 | int more_moving, more_no_history; | |
2250 | ||
2251 | more_moving = !VEC_empty (tp_t, moving); | |
2252 | more_no_history = !VEC_empty (tp_t, no_history); | |
2253 | ||
2254 | if (!more_moving && !more_no_history) | |
2255 | return; | |
2256 | ||
2257 | if (more_moving) | |
2258 | DEBUG ("movers pending"); | |
2259 | ||
2260 | if (more_no_history) | |
2261 | DEBUG ("no-history pending"); | |
2262 | ||
2263 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
2264 | } | |
2265 | ||
b2f4cfde MM |
2266 | /* The to_wait method of target record-btrace. */ |
2267 | ||
2268 | static ptid_t | |
2269 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2270 | struct target_waitstatus *status, int options) | |
2271 | { | |
e3cfc1c7 MM |
2272 | VEC (tp_t) *moving, *no_history; |
2273 | struct thread_info *tp, *eventing; | |
2274 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
52834460 MM |
2275 | |
2276 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2277 | ||
b2f4cfde | 2278 | /* As long as we're not replaying, just forward the request. */ |
a52eab48 MM |
2279 | if ((execution_direction != EXEC_REVERSE) |
2280 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2281 | { |
e75fdfca TT |
2282 | ops = ops->beneath; |
2283 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2284 | } |
2285 | ||
e3cfc1c7 MM |
2286 | moving = NULL; |
2287 | no_history = NULL; | |
2288 | ||
2289 | make_cleanup (VEC_cleanup (tp_t), &moving); | |
2290 | make_cleanup (VEC_cleanup (tp_t), &no_history); | |
2291 | ||
2292 | /* Keep a work list of moving threads. */ | |
2293 | ALL_NON_EXITED_THREADS (tp) | |
2294 | if (ptid_match (tp->ptid, ptid) | |
2295 | && ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)) | |
2296 | VEC_safe_push (tp_t, moving, tp); | |
2297 | ||
2298 | if (VEC_empty (tp_t, moving)) | |
52834460 | 2299 | { |
e3cfc1c7 | 2300 | *status = btrace_step_no_resumed (); |
52834460 | 2301 | |
e3cfc1c7 MM |
2302 | DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid), |
2303 | target_waitstatus_to_string (status)); | |
2304 | ||
2305 | do_cleanups (cleanups); | |
2306 | return null_ptid; | |
52834460 MM |
2307 | } |
2308 | ||
e3cfc1c7 MM |
2309 | /* Step moving threads one by one, one step each, until either one thread |
2310 | reports an event or we run out of threads to step. | |
2311 | ||
2312 | When stepping more than one thread, chances are that some threads reach | |
2313 | the end of their execution history earlier than others. If we reported | |
2314 | this immediately, all-stop on top of non-stop would stop all threads and | |
2315 | resume the same threads next time. And we would report the same thread | |
2316 | having reached the end of its execution history again. | |
2317 | ||
2318 | In the worst case, this would starve the other threads. But even if other | |
2319 | threads would be allowed to make progress, this would result in far too | |
2320 | many intermediate stops. | |
2321 | ||
2322 | We therefore delay the reporting of "no execution history" until we have | |
2323 | nothing else to report. By this time, all threads should have moved to | |
2324 | either the beginning or the end of their execution history. There will | |
2325 | be a single user-visible stop. */ | |
2326 | eventing = NULL; | |
2327 | while ((eventing == NULL) && !VEC_empty (tp_t, moving)) | |
2328 | { | |
2329 | unsigned int ix; | |
2330 | ||
2331 | ix = 0; | |
2332 | while ((eventing == NULL) && VEC_iterate (tp_t, moving, ix, tp)) | |
2333 | { | |
2334 | *status = record_btrace_step_thread (tp); | |
2335 | ||
2336 | switch (status->kind) | |
2337 | { | |
2338 | case TARGET_WAITKIND_IGNORE: | |
2339 | ix++; | |
2340 | break; | |
2341 | ||
2342 | case TARGET_WAITKIND_NO_HISTORY: | |
2343 | VEC_safe_push (tp_t, no_history, | |
2344 | VEC_ordered_remove (tp_t, moving, ix)); | |
2345 | break; | |
2346 | ||
2347 | default: | |
2348 | eventing = VEC_unordered_remove (tp_t, moving, ix); | |
2349 | break; | |
2350 | } | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | if (eventing == NULL) | |
2355 | { | |
2356 | /* We started with at least one moving thread. This thread must have | |
2357 | either stopped or reached the end of its execution history. | |
2358 | ||
2359 | In the former case, EVENTING must not be NULL. | |
2360 | In the latter case, NO_HISTORY must not be empty. */ | |
2361 | gdb_assert (!VEC_empty (tp_t, no_history)); | |
2362 | ||
2363 | /* We kept threads moving at the end of their execution history. Stop | |
2364 | EVENTING now that we are going to report its stop. */ | |
2365 | eventing = VEC_unordered_remove (tp_t, no_history, 0); | |
2366 | eventing->btrace.flags &= ~BTHR_MOVE; | |
2367 | ||
2368 | *status = btrace_step_no_history (); | |
2369 | } | |
2370 | ||
2371 | gdb_assert (eventing != NULL); | |
2372 | ||
2373 | /* We kept threads replaying at the end of their execution history. Stop | |
2374 | replaying EVENTING now that we are going to report its stop. */ | |
2375 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2376 | |
2377 | /* Stop all other threads. */ | |
5953356c | 2378 | if (!target_is_non_stop_p ()) |
e3cfc1c7 MM |
2379 | ALL_NON_EXITED_THREADS (tp) |
2380 | record_btrace_cancel_resume (tp); | |
52834460 | 2381 | |
a6b5be76 MM |
2382 | /* In async mode, we need to announce further events. */ |
2383 | if (target_is_async_p ()) | |
2384 | record_btrace_maybe_mark_async_event (moving, no_history); | |
2385 | ||
52834460 | 2386 | /* Start record histories anew from the current position. */ |
e3cfc1c7 | 2387 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2388 | |
2389 | /* We moved the replay position but did not update registers. */ | |
e3cfc1c7 MM |
2390 | registers_changed_ptid (eventing->ptid); |
2391 | ||
2392 | DEBUG ("wait ended by thread %d (%s): %s", eventing->num, | |
2393 | target_pid_to_str (eventing->ptid), | |
2394 | target_waitstatus_to_string (status)); | |
52834460 | 2395 | |
e3cfc1c7 MM |
2396 | do_cleanups (cleanups); |
2397 | return eventing->ptid; | |
52834460 MM |
2398 | } |
2399 | ||
6e4879f0 MM |
2400 | /* The to_stop method of target record-btrace. */ |
2401 | ||
2402 | static void | |
2403 | record_btrace_stop (struct target_ops *ops, ptid_t ptid) | |
2404 | { | |
2405 | DEBUG ("stop %s", target_pid_to_str (ptid)); | |
2406 | ||
2407 | /* As long as we're not replaying, just forward the request. */ | |
a52eab48 MM |
2408 | if ((execution_direction != EXEC_REVERSE) |
2409 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
6e4879f0 MM |
2410 | { |
2411 | ops = ops->beneath; | |
2412 | ops->to_stop (ops, ptid); | |
2413 | } | |
2414 | else | |
2415 | { | |
2416 | struct thread_info *tp; | |
2417 | ||
2418 | ALL_NON_EXITED_THREADS (tp) | |
2419 | if (ptid_match (tp->ptid, ptid)) | |
2420 | { | |
2421 | tp->btrace.flags &= ~BTHR_MOVE; | |
2422 | tp->btrace.flags |= BTHR_STOP; | |
2423 | } | |
2424 | } | |
2425 | } | |
2426 | ||
52834460 MM |
2427 | /* The to_can_execute_reverse method of target record-btrace. */ |
2428 | ||
2429 | static int | |
19db3e69 | 2430 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2431 | { |
2432 | return 1; | |
2433 | } | |
2434 | ||
9e8915c6 | 2435 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2436 | |
9e8915c6 PA |
2437 | static int |
2438 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2439 | { |
a52eab48 | 2440 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2441 | { |
2442 | struct thread_info *tp = inferior_thread (); | |
2443 | ||
2444 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2445 | } | |
2446 | ||
2447 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2448 | } | |
2449 | ||
2450 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2451 | record-btrace. */ | |
2452 | ||
2453 | static int | |
2454 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2455 | { | |
a52eab48 | 2456 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2457 | return 1; |
2458 | ||
2459 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2460 | } | |
2461 | ||
2462 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2463 | ||
2464 | static int | |
2465 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2466 | { | |
a52eab48 | 2467 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2468 | { |
2469 | struct thread_info *tp = inferior_thread (); | |
2470 | ||
2471 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2472 | } | |
2473 | ||
2474 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2475 | } | |
2476 | ||
2477 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2478 | record-btrace. */ | |
2479 | ||
2480 | static int | |
2481 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2482 | { | |
a52eab48 | 2483 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 | 2484 | return 1; |
52834460 | 2485 | |
9e8915c6 | 2486 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2487 | } |
2488 | ||
e8032dde | 2489 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2490 | |
2491 | static void | |
e8032dde | 2492 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2493 | { |
e8032dde | 2494 | /* We don't add or remove threads during replay. */ |
a52eab48 | 2495 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2496 | return; |
2497 | ||
2498 | /* Forward the request. */ | |
e75fdfca | 2499 | ops = ops->beneath; |
e8032dde | 2500 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2501 | } |
2502 | ||
2503 | /* The to_thread_alive method of target record-btrace. */ | |
2504 | ||
2505 | static int | |
2506 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2507 | { | |
2508 | /* We don't add or remove threads during replay. */ | |
a52eab48 | 2509 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2510 | return find_thread_ptid (ptid) != NULL; |
2511 | ||
2512 | /* Forward the request. */ | |
e75fdfca TT |
2513 | ops = ops->beneath; |
2514 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2515 | } |
2516 | ||
066ce621 MM |
2517 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2518 | is stopped. */ | |
2519 | ||
2520 | static void | |
2521 | record_btrace_set_replay (struct thread_info *tp, | |
2522 | const struct btrace_insn_iterator *it) | |
2523 | { | |
2524 | struct btrace_thread_info *btinfo; | |
2525 | ||
2526 | btinfo = &tp->btrace; | |
2527 | ||
2528 | if (it == NULL || it->function == NULL) | |
52834460 | 2529 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2530 | else |
2531 | { | |
2532 | if (btinfo->replay == NULL) | |
52834460 | 2533 | record_btrace_start_replaying (tp); |
066ce621 MM |
2534 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2535 | return; | |
2536 | ||
2537 | *btinfo->replay = *it; | |
52834460 | 2538 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2539 | } |
2540 | ||
52834460 MM |
2541 | /* Start anew from the new replay position. */ |
2542 | record_btrace_clear_histories (btinfo); | |
485668e5 MM |
2543 | |
2544 | stop_pc = regcache_read_pc (get_current_regcache ()); | |
2545 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
066ce621 MM |
2546 | } |
2547 | ||
2548 | /* The to_goto_record_begin method of target record-btrace. */ | |
2549 | ||
2550 | static void | |
08475817 | 2551 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2552 | { |
2553 | struct thread_info *tp; | |
2554 | struct btrace_insn_iterator begin; | |
2555 | ||
2556 | tp = require_btrace_thread (); | |
2557 | ||
2558 | btrace_insn_begin (&begin, &tp->btrace); | |
2559 | record_btrace_set_replay (tp, &begin); | |
066ce621 MM |
2560 | } |
2561 | ||
2562 | /* The to_goto_record_end method of target record-btrace. */ | |
2563 | ||
2564 | static void | |
307a1b91 | 2565 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2566 | { |
2567 | struct thread_info *tp; | |
2568 | ||
2569 | tp = require_btrace_thread (); | |
2570 | ||
2571 | record_btrace_set_replay (tp, NULL); | |
066ce621 MM |
2572 | } |
2573 | ||
2574 | /* The to_goto_record method of target record-btrace. */ | |
2575 | ||
2576 | static void | |
606183ac | 2577 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2578 | { |
2579 | struct thread_info *tp; | |
2580 | struct btrace_insn_iterator it; | |
2581 | unsigned int number; | |
2582 | int found; | |
2583 | ||
2584 | number = insn; | |
2585 | ||
2586 | /* Check for wrap-arounds. */ | |
2587 | if (number != insn) | |
2588 | error (_("Instruction number out of range.")); | |
2589 | ||
2590 | tp = require_btrace_thread (); | |
2591 | ||
2592 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2593 | if (found == 0) | |
2594 | error (_("No such instruction.")); | |
2595 | ||
2596 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2597 | } |
2598 | ||
70ad5bff MM |
2599 | /* The to_execution_direction target method. */ |
2600 | ||
2601 | static enum exec_direction_kind | |
2602 | record_btrace_execution_direction (struct target_ops *self) | |
2603 | { | |
2604 | return record_btrace_resume_exec_dir; | |
2605 | } | |
2606 | ||
aef92902 MM |
2607 | /* The to_prepare_to_generate_core target method. */ |
2608 | ||
2609 | static void | |
2610 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2611 | { | |
2612 | record_btrace_generating_corefile = 1; | |
2613 | } | |
2614 | ||
2615 | /* The to_done_generating_core target method. */ | |
2616 | ||
2617 | static void | |
2618 | record_btrace_done_generating_core (struct target_ops *self) | |
2619 | { | |
2620 | record_btrace_generating_corefile = 0; | |
2621 | } | |
2622 | ||
afedecd3 MM |
2623 | /* Initialize the record-btrace target ops. */ |
2624 | ||
2625 | static void | |
2626 | init_record_btrace_ops (void) | |
2627 | { | |
2628 | struct target_ops *ops; | |
2629 | ||
2630 | ops = &record_btrace_ops; | |
2631 | ops->to_shortname = "record-btrace"; | |
2632 | ops->to_longname = "Branch tracing target"; | |
2633 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2634 | ops->to_open = record_btrace_open; | |
2635 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2636 | ops->to_async = record_btrace_async; |
afedecd3 MM |
2637 | ops->to_detach = record_detach; |
2638 | ops->to_disconnect = record_disconnect; | |
2639 | ops->to_mourn_inferior = record_mourn_inferior; | |
2640 | ops->to_kill = record_kill; | |
afedecd3 MM |
2641 | ops->to_stop_recording = record_btrace_stop_recording; |
2642 | ops->to_info_record = record_btrace_info; | |
2643 | ops->to_insn_history = record_btrace_insn_history; | |
2644 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2645 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2646 | ops->to_call_history = record_btrace_call_history; | |
2647 | ops->to_call_history_from = record_btrace_call_history_from; | |
2648 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2649 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
2650 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2651 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2652 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2653 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2654 | ops->to_store_registers = record_btrace_store_registers; | |
2655 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2656 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2657 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2658 | ops->to_resume = record_btrace_resume; |
2659 | ops->to_wait = record_btrace_wait; | |
6e4879f0 | 2660 | ops->to_stop = record_btrace_stop; |
e8032dde | 2661 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2662 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2663 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2664 | ops->to_goto_record_end = record_btrace_goto_end; | |
2665 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2666 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2667 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2668 | ops->to_supports_stopped_by_sw_breakpoint | |
2669 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2670 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2671 | ops->to_supports_stopped_by_hw_breakpoint | |
2672 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2673 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2674 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2675 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2676 | ops->to_stratum = record_stratum; |
2677 | ops->to_magic = OPS_MAGIC; | |
2678 | } | |
2679 | ||
f4abbc16 MM |
2680 | /* Start recording in BTS format. */ |
2681 | ||
2682 | static void | |
2683 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2684 | { | |
f4abbc16 MM |
2685 | if (args != NULL && *args != 0) |
2686 | error (_("Invalid argument.")); | |
2687 | ||
2688 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2689 | ||
492d29ea PA |
2690 | TRY |
2691 | { | |
2692 | execute_command ("target record-btrace", from_tty); | |
2693 | } | |
2694 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2695 | { |
2696 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2697 | throw_exception (exception); | |
2698 | } | |
492d29ea | 2699 | END_CATCH |
f4abbc16 MM |
2700 | } |
2701 | ||
b20a6524 | 2702 | /* Start recording Intel(R) Processor Trace. */ |
afedecd3 MM |
2703 | |
2704 | static void | |
b20a6524 | 2705 | cmd_record_btrace_pt_start (char *args, int from_tty) |
afedecd3 MM |
2706 | { |
2707 | if (args != NULL && *args != 0) | |
2708 | error (_("Invalid argument.")); | |
2709 | ||
b20a6524 | 2710 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2711 | |
492d29ea PA |
2712 | TRY |
2713 | { | |
2714 | execute_command ("target record-btrace", from_tty); | |
2715 | } | |
2716 | CATCH (exception, RETURN_MASK_ALL) | |
2717 | { | |
2718 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2719 | throw_exception (exception); | |
2720 | } | |
2721 | END_CATCH | |
afedecd3 MM |
2722 | } |
2723 | ||
b20a6524 MM |
2724 | /* Alias for "target record". */ |
2725 | ||
2726 | static void | |
2727 | cmd_record_btrace_start (char *args, int from_tty) | |
2728 | { | |
2729 | if (args != NULL && *args != 0) | |
2730 | error (_("Invalid argument.")); | |
2731 | ||
2732 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2733 | ||
2734 | TRY | |
2735 | { | |
2736 | execute_command ("target record-btrace", from_tty); | |
2737 | } | |
2738 | CATCH (exception, RETURN_MASK_ALL) | |
2739 | { | |
2740 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2741 | ||
2742 | TRY | |
2743 | { | |
2744 | execute_command ("target record-btrace", from_tty); | |
2745 | } | |
2746 | CATCH (exception, RETURN_MASK_ALL) | |
2747 | { | |
2748 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2749 | throw_exception (exception); | |
2750 | } | |
2751 | END_CATCH | |
2752 | } | |
2753 | END_CATCH | |
2754 | } | |
2755 | ||
67b5c0c1 MM |
2756 | /* The "set record btrace" command. */ |
2757 | ||
2758 | static void | |
2759 | cmd_set_record_btrace (char *args, int from_tty) | |
2760 | { | |
2761 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2762 | } | |
2763 | ||
2764 | /* The "show record btrace" command. */ | |
2765 | ||
2766 | static void | |
2767 | cmd_show_record_btrace (char *args, int from_tty) | |
2768 | { | |
2769 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2770 | } | |
2771 | ||
2772 | /* The "show record btrace replay-memory-access" command. */ | |
2773 | ||
2774 | static void | |
2775 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2776 | struct cmd_list_element *c, const char *value) | |
2777 | { | |
2778 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2779 | replay_memory_access); | |
2780 | } | |
2781 | ||
d33501a5 MM |
2782 | /* The "set record btrace bts" command. */ |
2783 | ||
2784 | static void | |
2785 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
2786 | { | |
2787 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
b20a6524 | 2788 | "by an appropriate subcommand.\n")); |
d33501a5 MM |
2789 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", |
2790 | all_commands, gdb_stdout); | |
2791 | } | |
2792 | ||
2793 | /* The "show record btrace bts" command. */ | |
2794 | ||
2795 | static void | |
2796 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
2797 | { | |
2798 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
2799 | } | |
2800 | ||
b20a6524 MM |
2801 | /* The "set record btrace pt" command. */ |
2802 | ||
2803 | static void | |
2804 | cmd_set_record_btrace_pt (char *args, int from_tty) | |
2805 | { | |
2806 | printf_unfiltered (_("\"set record btrace pt\" must be followed " | |
2807 | "by an appropriate subcommand.\n")); | |
2808 | help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ", | |
2809 | all_commands, gdb_stdout); | |
2810 | } | |
2811 | ||
2812 | /* The "show record btrace pt" command. */ | |
2813 | ||
2814 | static void | |
2815 | cmd_show_record_btrace_pt (char *args, int from_tty) | |
2816 | { | |
2817 | cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, ""); | |
2818 | } | |
2819 | ||
2820 | /* The "record bts buffer-size" show value function. */ | |
2821 | ||
2822 | static void | |
2823 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
2824 | struct cmd_list_element *c, | |
2825 | const char *value) | |
2826 | { | |
2827 | fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"), | |
2828 | value); | |
2829 | } | |
2830 | ||
2831 | /* The "record pt buffer-size" show value function. */ | |
2832 | ||
2833 | static void | |
2834 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
2835 | struct cmd_list_element *c, | |
2836 | const char *value) | |
2837 | { | |
2838 | fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"), | |
2839 | value); | |
2840 | } | |
2841 | ||
afedecd3 MM |
2842 | void _initialize_record_btrace (void); |
2843 | ||
2844 | /* Initialize btrace commands. */ | |
2845 | ||
2846 | void | |
2847 | _initialize_record_btrace (void) | |
2848 | { | |
f4abbc16 MM |
2849 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
2850 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
2851 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
2852 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
2853 | ||
f4abbc16 MM |
2854 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
2855 | _("\ | |
2856 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
2857 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
2858 | This format may not be available on all processors."), | |
2859 | &record_btrace_cmdlist); | |
2860 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
2861 | ||
b20a6524 MM |
2862 | add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, |
2863 | _("\ | |
2864 | Start branch trace recording in Intel(R) Processor Trace format.\n\n\ | |
2865 | This format may not be available on all processors."), | |
2866 | &record_btrace_cmdlist); | |
2867 | add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist); | |
2868 | ||
67b5c0c1 MM |
2869 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
2870 | _("Set record options"), &set_record_btrace_cmdlist, | |
2871 | "set record btrace ", 0, &set_record_cmdlist); | |
2872 | ||
2873 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
2874 | _("Show record options"), &show_record_btrace_cmdlist, | |
2875 | "show record btrace ", 0, &show_record_cmdlist); | |
2876 | ||
2877 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
2878 | replay_memory_access_types, &replay_memory_access, _("\ | |
2879 | Set what memory accesses are allowed during replay."), _("\ | |
2880 | Show what memory accesses are allowed during replay."), | |
2881 | _("Default is READ-ONLY.\n\n\ | |
2882 | The btrace record target does not trace data.\n\ | |
2883 | The memory therefore corresponds to the live target and not \ | |
2884 | to the current replay position.\n\n\ | |
2885 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
2886 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
2887 | replay."), | |
2888 | NULL, cmd_show_replay_memory_access, | |
2889 | &set_record_btrace_cmdlist, | |
2890 | &show_record_btrace_cmdlist); | |
2891 | ||
d33501a5 MM |
2892 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
2893 | _("Set record btrace bts options"), | |
2894 | &set_record_btrace_bts_cmdlist, | |
2895 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
2896 | ||
2897 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
2898 | _("Show record btrace bts options"), | |
2899 | &show_record_btrace_bts_cmdlist, | |
2900 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
2901 | ||
2902 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2903 | &record_btrace_conf.bts.size, | |
2904 | _("Set the record/replay bts buffer size."), | |
2905 | _("Show the record/replay bts buffer size."), _("\ | |
2906 | When starting recording request a trace buffer of this size. \ | |
2907 | The actual buffer size may differ from the requested size. \ | |
2908 | Use \"info record\" to see the actual buffer size.\n\n\ | |
2909 | Bigger buffers allow longer recording but also take more time to process \ | |
2910 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
2911 | The trace buffer size may not be changed while recording."), NULL, |
2912 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
2913 | &set_record_btrace_bts_cmdlist, |
2914 | &show_record_btrace_bts_cmdlist); | |
2915 | ||
b20a6524 MM |
2916 | add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt, |
2917 | _("Set record btrace pt options"), | |
2918 | &set_record_btrace_pt_cmdlist, | |
2919 | "set record btrace pt ", 0, &set_record_btrace_cmdlist); | |
2920 | ||
2921 | add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt, | |
2922 | _("Show record btrace pt options"), | |
2923 | &show_record_btrace_pt_cmdlist, | |
2924 | "show record btrace pt ", 0, &show_record_btrace_cmdlist); | |
2925 | ||
2926 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2927 | &record_btrace_conf.pt.size, | |
2928 | _("Set the record/replay pt buffer size."), | |
2929 | _("Show the record/replay pt buffer size."), _("\ | |
2930 | Bigger buffers allow longer recording but also take more time to process \ | |
2931 | the recorded execution.\n\ | |
2932 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
2933 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
2934 | &set_record_btrace_pt_cmdlist, | |
2935 | &show_record_btrace_pt_cmdlist); | |
2936 | ||
afedecd3 MM |
2937 | init_record_btrace_ops (); |
2938 | add_target (&record_btrace_ops); | |
0b722aec MM |
2939 | |
2940 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
2941 | xcalloc, xfree); | |
d33501a5 MM |
2942 | |
2943 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 2944 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 2945 | } |