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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
61baf725 | 3 | Copyright (C) 2013-2017 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" | |
c0272db5 | 24 | #include "record-btrace.h" |
afedecd3 MM |
25 | #include "gdbthread.h" |
26 | #include "target.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "disasm.h" | |
29 | #include "observer.h" | |
afedecd3 MM |
30 | #include "cli/cli-utils.h" |
31 | #include "source.h" | |
32 | #include "ui-out.h" | |
33 | #include "symtab.h" | |
34 | #include "filenames.h" | |
1f3ef581 | 35 | #include "regcache.h" |
cecac1ab | 36 | #include "frame-unwind.h" |
0b722aec | 37 | #include "hashtab.h" |
45741a9c | 38 | #include "infrun.h" |
70ad5bff MM |
39 | #include "event-loop.h" |
40 | #include "inf-loop.h" | |
e3cfc1c7 | 41 | #include "vec.h" |
325fac50 | 42 | #include <algorithm> |
afedecd3 MM |
43 | |
44 | /* The target_ops of record-btrace. */ | |
45 | static struct target_ops record_btrace_ops; | |
46 | ||
47 | /* A new thread observer enabling branch tracing for the new thread. */ | |
48 | static struct observer *record_btrace_thread_observer; | |
49 | ||
67b5c0c1 MM |
50 | /* Memory access types used in set/show record btrace replay-memory-access. */ |
51 | static const char replay_memory_access_read_only[] = "read-only"; | |
52 | static const char replay_memory_access_read_write[] = "read-write"; | |
53 | static const char *const replay_memory_access_types[] = | |
54 | { | |
55 | replay_memory_access_read_only, | |
56 | replay_memory_access_read_write, | |
57 | NULL | |
58 | }; | |
59 | ||
60 | /* The currently allowed replay memory access type. */ | |
61 | static const char *replay_memory_access = replay_memory_access_read_only; | |
62 | ||
63 | /* Command lists for "set/show record btrace". */ | |
64 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
65 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
633785ff | 66 | |
70ad5bff MM |
67 | /* The execution direction of the last resume we got. See record-full.c. */ |
68 | static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD; | |
69 | ||
70 | /* The async event handler for reverse/replay execution. */ | |
71 | static struct async_event_handler *record_btrace_async_inferior_event_handler; | |
72 | ||
aef92902 MM |
73 | /* A flag indicating that we are currently generating a core file. */ |
74 | static int record_btrace_generating_corefile; | |
75 | ||
f4abbc16 MM |
76 | /* The current branch trace configuration. */ |
77 | static struct btrace_config record_btrace_conf; | |
78 | ||
79 | /* Command list for "record btrace". */ | |
80 | static struct cmd_list_element *record_btrace_cmdlist; | |
81 | ||
d33501a5 MM |
82 | /* Command lists for "set/show record btrace bts". */ |
83 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
84 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
85 | ||
b20a6524 MM |
86 | /* Command lists for "set/show record btrace pt". */ |
87 | static struct cmd_list_element *set_record_btrace_pt_cmdlist; | |
88 | static struct cmd_list_element *show_record_btrace_pt_cmdlist; | |
89 | ||
afedecd3 MM |
90 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
91 | ambiguities when used in if statements. */ | |
92 | ||
93 | #define DEBUG(msg, args...) \ | |
94 | do \ | |
95 | { \ | |
96 | if (record_debug != 0) \ | |
97 | fprintf_unfiltered (gdb_stdlog, \ | |
98 | "[record-btrace] " msg "\n", ##args); \ | |
99 | } \ | |
100 | while (0) | |
101 | ||
102 | ||
103 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 104 | thread_info. |
afedecd3 MM |
105 | |
106 | Throws an error if there is no thread or no trace. This function never | |
107 | returns NULL. */ | |
108 | ||
066ce621 MM |
109 | static struct thread_info * |
110 | require_btrace_thread (void) | |
afedecd3 MM |
111 | { |
112 | struct thread_info *tp; | |
afedecd3 MM |
113 | |
114 | DEBUG ("require"); | |
115 | ||
116 | tp = find_thread_ptid (inferior_ptid); | |
117 | if (tp == NULL) | |
118 | error (_("No thread.")); | |
119 | ||
cd4007e4 MM |
120 | validate_registers_access (); |
121 | ||
afedecd3 MM |
122 | btrace_fetch (tp); |
123 | ||
6e07b1d2 | 124 | if (btrace_is_empty (tp)) |
afedecd3 MM |
125 | error (_("No trace.")); |
126 | ||
066ce621 MM |
127 | return tp; |
128 | } | |
129 | ||
130 | /* Update the branch trace for the current thread and return a pointer to its | |
131 | branch trace information struct. | |
132 | ||
133 | Throws an error if there is no thread or no trace. This function never | |
134 | returns NULL. */ | |
135 | ||
136 | static struct btrace_thread_info * | |
137 | require_btrace (void) | |
138 | { | |
139 | struct thread_info *tp; | |
140 | ||
141 | tp = require_btrace_thread (); | |
142 | ||
143 | return &tp->btrace; | |
afedecd3 MM |
144 | } |
145 | ||
146 | /* Enable branch tracing for one thread. Warn on errors. */ | |
147 | ||
148 | static void | |
149 | record_btrace_enable_warn (struct thread_info *tp) | |
150 | { | |
492d29ea PA |
151 | TRY |
152 | { | |
153 | btrace_enable (tp, &record_btrace_conf); | |
154 | } | |
155 | CATCH (error, RETURN_MASK_ERROR) | |
156 | { | |
157 | warning ("%s", error.message); | |
158 | } | |
159 | END_CATCH | |
afedecd3 MM |
160 | } |
161 | ||
162 | /* Callback function to disable branch tracing for one thread. */ | |
163 | ||
164 | static void | |
165 | record_btrace_disable_callback (void *arg) | |
166 | { | |
19ba03f4 | 167 | struct thread_info *tp = (struct thread_info *) arg; |
afedecd3 MM |
168 | |
169 | btrace_disable (tp); | |
170 | } | |
171 | ||
172 | /* Enable automatic tracing of new threads. */ | |
173 | ||
174 | static void | |
175 | record_btrace_auto_enable (void) | |
176 | { | |
177 | DEBUG ("attach thread observer"); | |
178 | ||
179 | record_btrace_thread_observer | |
180 | = observer_attach_new_thread (record_btrace_enable_warn); | |
181 | } | |
182 | ||
183 | /* Disable automatic tracing of new threads. */ | |
184 | ||
185 | static void | |
186 | record_btrace_auto_disable (void) | |
187 | { | |
188 | /* The observer may have been detached, already. */ | |
189 | if (record_btrace_thread_observer == NULL) | |
190 | return; | |
191 | ||
192 | DEBUG ("detach thread observer"); | |
193 | ||
194 | observer_detach_new_thread (record_btrace_thread_observer); | |
195 | record_btrace_thread_observer = NULL; | |
196 | } | |
197 | ||
70ad5bff MM |
198 | /* The record-btrace async event handler function. */ |
199 | ||
200 | static void | |
201 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
202 | { | |
203 | inferior_event_handler (INF_REG_EVENT, NULL); | |
204 | } | |
205 | ||
c0272db5 TW |
206 | /* See record-btrace.h. */ |
207 | ||
208 | void | |
209 | record_btrace_push_target (void) | |
210 | { | |
211 | const char *format; | |
212 | ||
213 | record_btrace_auto_enable (); | |
214 | ||
215 | push_target (&record_btrace_ops); | |
216 | ||
217 | record_btrace_async_inferior_event_handler | |
218 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
219 | NULL); | |
220 | record_btrace_generating_corefile = 0; | |
221 | ||
222 | format = btrace_format_short_string (record_btrace_conf.format); | |
223 | observer_notify_record_changed (current_inferior (), 1, "btrace", format); | |
224 | } | |
225 | ||
afedecd3 MM |
226 | /* The to_open method of target record-btrace. */ |
227 | ||
228 | static void | |
014f9477 | 229 | record_btrace_open (const char *args, int from_tty) |
afedecd3 MM |
230 | { |
231 | struct cleanup *disable_chain; | |
232 | struct thread_info *tp; | |
233 | ||
234 | DEBUG ("open"); | |
235 | ||
8213266a | 236 | record_preopen (); |
afedecd3 MM |
237 | |
238 | if (!target_has_execution) | |
239 | error (_("The program is not being run.")); | |
240 | ||
afedecd3 MM |
241 | gdb_assert (record_btrace_thread_observer == NULL); |
242 | ||
243 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 244 | ALL_NON_EXITED_THREADS (tp) |
5d5658a1 | 245 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num)) |
afedecd3 | 246 | { |
f4abbc16 | 247 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
248 | |
249 | make_cleanup (record_btrace_disable_callback, tp); | |
250 | } | |
251 | ||
c0272db5 | 252 | record_btrace_push_target (); |
afedecd3 MM |
253 | |
254 | discard_cleanups (disable_chain); | |
255 | } | |
256 | ||
257 | /* The to_stop_recording method of target record-btrace. */ | |
258 | ||
259 | static void | |
c6cd7c02 | 260 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
261 | { |
262 | struct thread_info *tp; | |
263 | ||
264 | DEBUG ("stop recording"); | |
265 | ||
266 | record_btrace_auto_disable (); | |
267 | ||
034f788c | 268 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
269 | if (tp->btrace.target != NULL) |
270 | btrace_disable (tp); | |
271 | } | |
272 | ||
c0272db5 TW |
273 | /* The to_disconnect method of target record-btrace. */ |
274 | ||
275 | static void | |
276 | record_btrace_disconnect (struct target_ops *self, const char *args, | |
277 | int from_tty) | |
278 | { | |
279 | struct target_ops *beneath = self->beneath; | |
280 | ||
281 | /* Do not stop recording, just clean up GDB side. */ | |
282 | unpush_target (self); | |
283 | ||
284 | /* Forward disconnect. */ | |
285 | beneath->to_disconnect (beneath, args, from_tty); | |
286 | } | |
287 | ||
afedecd3 MM |
288 | /* The to_close method of target record-btrace. */ |
289 | ||
290 | static void | |
de90e03d | 291 | record_btrace_close (struct target_ops *self) |
afedecd3 | 292 | { |
568e808b MM |
293 | struct thread_info *tp; |
294 | ||
70ad5bff MM |
295 | if (record_btrace_async_inferior_event_handler != NULL) |
296 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
297 | ||
99c819ee MM |
298 | /* Make sure automatic recording gets disabled even if we did not stop |
299 | recording before closing the record-btrace target. */ | |
300 | record_btrace_auto_disable (); | |
301 | ||
568e808b MM |
302 | /* We should have already stopped recording. |
303 | Tear down btrace in case we have not. */ | |
034f788c | 304 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 305 | btrace_teardown (tp); |
afedecd3 MM |
306 | } |
307 | ||
b7d2e916 PA |
308 | /* The to_async method of target record-btrace. */ |
309 | ||
310 | static void | |
6a3753b3 | 311 | record_btrace_async (struct target_ops *ops, int enable) |
b7d2e916 | 312 | { |
6a3753b3 | 313 | if (enable) |
b7d2e916 PA |
314 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
315 | else | |
316 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
317 | ||
6a3753b3 | 318 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
319 | } |
320 | ||
d33501a5 MM |
321 | /* Adjusts the size and returns a human readable size suffix. */ |
322 | ||
323 | static const char * | |
324 | record_btrace_adjust_size (unsigned int *size) | |
325 | { | |
326 | unsigned int sz; | |
327 | ||
328 | sz = *size; | |
329 | ||
330 | if ((sz & ((1u << 30) - 1)) == 0) | |
331 | { | |
332 | *size = sz >> 30; | |
333 | return "GB"; | |
334 | } | |
335 | else if ((sz & ((1u << 20) - 1)) == 0) | |
336 | { | |
337 | *size = sz >> 20; | |
338 | return "MB"; | |
339 | } | |
340 | else if ((sz & ((1u << 10) - 1)) == 0) | |
341 | { | |
342 | *size = sz >> 10; | |
343 | return "kB"; | |
344 | } | |
345 | else | |
346 | return ""; | |
347 | } | |
348 | ||
349 | /* Print a BTS configuration. */ | |
350 | ||
351 | static void | |
352 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
353 | { | |
354 | const char *suffix; | |
355 | unsigned int size; | |
356 | ||
357 | size = conf->size; | |
358 | if (size > 0) | |
359 | { | |
360 | suffix = record_btrace_adjust_size (&size); | |
361 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
362 | } | |
363 | } | |
364 | ||
bc504a31 | 365 | /* Print an Intel Processor Trace configuration. */ |
b20a6524 MM |
366 | |
367 | static void | |
368 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
369 | { | |
370 | const char *suffix; | |
371 | unsigned int size; | |
372 | ||
373 | size = conf->size; | |
374 | if (size > 0) | |
375 | { | |
376 | suffix = record_btrace_adjust_size (&size); | |
377 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
378 | } | |
379 | } | |
380 | ||
d33501a5 MM |
381 | /* Print a branch tracing configuration. */ |
382 | ||
383 | static void | |
384 | record_btrace_print_conf (const struct btrace_config *conf) | |
385 | { | |
386 | printf_unfiltered (_("Recording format: %s.\n"), | |
387 | btrace_format_string (conf->format)); | |
388 | ||
389 | switch (conf->format) | |
390 | { | |
391 | case BTRACE_FORMAT_NONE: | |
392 | return; | |
393 | ||
394 | case BTRACE_FORMAT_BTS: | |
395 | record_btrace_print_bts_conf (&conf->bts); | |
396 | return; | |
b20a6524 MM |
397 | |
398 | case BTRACE_FORMAT_PT: | |
399 | record_btrace_print_pt_conf (&conf->pt); | |
400 | return; | |
d33501a5 MM |
401 | } |
402 | ||
403 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
404 | } | |
405 | ||
afedecd3 MM |
406 | /* The to_info_record method of target record-btrace. */ |
407 | ||
408 | static void | |
630d6a4a | 409 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
410 | { |
411 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 412 | const struct btrace_config *conf; |
afedecd3 | 413 | struct thread_info *tp; |
31fd9caa | 414 | unsigned int insns, calls, gaps; |
afedecd3 MM |
415 | |
416 | DEBUG ("info"); | |
417 | ||
418 | tp = find_thread_ptid (inferior_ptid); | |
419 | if (tp == NULL) | |
420 | error (_("No thread.")); | |
421 | ||
cd4007e4 MM |
422 | validate_registers_access (); |
423 | ||
f4abbc16 MM |
424 | btinfo = &tp->btrace; |
425 | ||
426 | conf = btrace_conf (btinfo); | |
427 | if (conf != NULL) | |
d33501a5 | 428 | record_btrace_print_conf (conf); |
f4abbc16 | 429 | |
afedecd3 MM |
430 | btrace_fetch (tp); |
431 | ||
23a7fe75 MM |
432 | insns = 0; |
433 | calls = 0; | |
31fd9caa | 434 | gaps = 0; |
23a7fe75 | 435 | |
6e07b1d2 | 436 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
437 | { |
438 | struct btrace_call_iterator call; | |
439 | struct btrace_insn_iterator insn; | |
440 | ||
441 | btrace_call_end (&call, btinfo); | |
442 | btrace_call_prev (&call, 1); | |
5de9129b | 443 | calls = btrace_call_number (&call); |
23a7fe75 MM |
444 | |
445 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 446 | |
5de9129b | 447 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
448 | if (insns != 0) |
449 | { | |
450 | /* The last instruction does not really belong to the trace. */ | |
451 | insns -= 1; | |
452 | } | |
453 | else | |
454 | { | |
455 | unsigned int steps; | |
456 | ||
457 | /* Skip gaps at the end. */ | |
458 | do | |
459 | { | |
460 | steps = btrace_insn_prev (&insn, 1); | |
461 | if (steps == 0) | |
462 | break; | |
463 | ||
464 | insns = btrace_insn_number (&insn); | |
465 | } | |
466 | while (insns == 0); | |
467 | } | |
468 | ||
469 | gaps = btinfo->ngaps; | |
23a7fe75 | 470 | } |
afedecd3 | 471 | |
31fd9caa | 472 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
43792cf0 PA |
473 | "for thread %s (%s).\n"), insns, calls, gaps, |
474 | print_thread_id (tp), target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
475 | |
476 | if (btrace_is_replaying (tp)) | |
477 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
478 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
479 | } |
480 | ||
31fd9caa MM |
481 | /* Print a decode error. */ |
482 | ||
483 | static void | |
484 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
485 | enum btrace_format format) | |
486 | { | |
487 | const char *errstr; | |
488 | int is_error; | |
489 | ||
490 | errstr = _("unknown"); | |
491 | is_error = 1; | |
492 | ||
493 | switch (format) | |
494 | { | |
495 | default: | |
496 | break; | |
497 | ||
498 | case BTRACE_FORMAT_BTS: | |
499 | switch (errcode) | |
500 | { | |
501 | default: | |
502 | break; | |
503 | ||
504 | case BDE_BTS_OVERFLOW: | |
505 | errstr = _("instruction overflow"); | |
506 | break; | |
507 | ||
508 | case BDE_BTS_INSN_SIZE: | |
509 | errstr = _("unknown instruction"); | |
510 | break; | |
511 | } | |
512 | break; | |
b20a6524 MM |
513 | |
514 | #if defined (HAVE_LIBIPT) | |
515 | case BTRACE_FORMAT_PT: | |
516 | switch (errcode) | |
517 | { | |
518 | case BDE_PT_USER_QUIT: | |
519 | is_error = 0; | |
520 | errstr = _("trace decode cancelled"); | |
521 | break; | |
522 | ||
523 | case BDE_PT_DISABLED: | |
524 | is_error = 0; | |
525 | errstr = _("disabled"); | |
526 | break; | |
527 | ||
528 | case BDE_PT_OVERFLOW: | |
529 | is_error = 0; | |
530 | errstr = _("overflow"); | |
531 | break; | |
532 | ||
533 | default: | |
534 | if (errcode < 0) | |
535 | errstr = pt_errstr (pt_errcode (errcode)); | |
536 | break; | |
537 | } | |
538 | break; | |
539 | #endif /* defined (HAVE_LIBIPT) */ | |
31fd9caa MM |
540 | } |
541 | ||
112e8700 | 542 | uiout->text (_("[")); |
31fd9caa MM |
543 | if (is_error) |
544 | { | |
112e8700 SM |
545 | uiout->text (_("decode error (")); |
546 | uiout->field_int ("errcode", errcode); | |
547 | uiout->text (_("): ")); | |
31fd9caa | 548 | } |
112e8700 SM |
549 | uiout->text (errstr); |
550 | uiout->text (_("]\n")); | |
31fd9caa MM |
551 | } |
552 | ||
afedecd3 MM |
553 | /* Print an unsigned int. */ |
554 | ||
555 | static void | |
556 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
557 | { | |
112e8700 | 558 | uiout->field_fmt (fld, "%u", val); |
afedecd3 MM |
559 | } |
560 | ||
f94cc897 MM |
561 | /* A range of source lines. */ |
562 | ||
563 | struct btrace_line_range | |
564 | { | |
565 | /* The symtab this line is from. */ | |
566 | struct symtab *symtab; | |
567 | ||
568 | /* The first line (inclusive). */ | |
569 | int begin; | |
570 | ||
571 | /* The last line (exclusive). */ | |
572 | int end; | |
573 | }; | |
574 | ||
575 | /* Construct a line range. */ | |
576 | ||
577 | static struct btrace_line_range | |
578 | btrace_mk_line_range (struct symtab *symtab, int begin, int end) | |
579 | { | |
580 | struct btrace_line_range range; | |
581 | ||
582 | range.symtab = symtab; | |
583 | range.begin = begin; | |
584 | range.end = end; | |
585 | ||
586 | return range; | |
587 | } | |
588 | ||
589 | /* Add a line to a line range. */ | |
590 | ||
591 | static struct btrace_line_range | |
592 | btrace_line_range_add (struct btrace_line_range range, int line) | |
593 | { | |
594 | if (range.end <= range.begin) | |
595 | { | |
596 | /* This is the first entry. */ | |
597 | range.begin = line; | |
598 | range.end = line + 1; | |
599 | } | |
600 | else if (line < range.begin) | |
601 | range.begin = line; | |
602 | else if (range.end < line) | |
603 | range.end = line; | |
604 | ||
605 | return range; | |
606 | } | |
607 | ||
608 | /* Return non-zero if RANGE is empty, zero otherwise. */ | |
609 | ||
610 | static int | |
611 | btrace_line_range_is_empty (struct btrace_line_range range) | |
612 | { | |
613 | return range.end <= range.begin; | |
614 | } | |
615 | ||
616 | /* Return non-zero if LHS contains RHS, zero otherwise. */ | |
617 | ||
618 | static int | |
619 | btrace_line_range_contains_range (struct btrace_line_range lhs, | |
620 | struct btrace_line_range rhs) | |
621 | { | |
622 | return ((lhs.symtab == rhs.symtab) | |
623 | && (lhs.begin <= rhs.begin) | |
624 | && (rhs.end <= lhs.end)); | |
625 | } | |
626 | ||
627 | /* Find the line range associated with PC. */ | |
628 | ||
629 | static struct btrace_line_range | |
630 | btrace_find_line_range (CORE_ADDR pc) | |
631 | { | |
632 | struct btrace_line_range range; | |
633 | struct linetable_entry *lines; | |
634 | struct linetable *ltable; | |
635 | struct symtab *symtab; | |
636 | int nlines, i; | |
637 | ||
638 | symtab = find_pc_line_symtab (pc); | |
639 | if (symtab == NULL) | |
640 | return btrace_mk_line_range (NULL, 0, 0); | |
641 | ||
642 | ltable = SYMTAB_LINETABLE (symtab); | |
643 | if (ltable == NULL) | |
644 | return btrace_mk_line_range (symtab, 0, 0); | |
645 | ||
646 | nlines = ltable->nitems; | |
647 | lines = ltable->item; | |
648 | if (nlines <= 0) | |
649 | return btrace_mk_line_range (symtab, 0, 0); | |
650 | ||
651 | range = btrace_mk_line_range (symtab, 0, 0); | |
652 | for (i = 0; i < nlines - 1; i++) | |
653 | { | |
654 | if ((lines[i].pc == pc) && (lines[i].line != 0)) | |
655 | range = btrace_line_range_add (range, lines[i].line); | |
656 | } | |
657 | ||
658 | return range; | |
659 | } | |
660 | ||
661 | /* Print source lines in LINES to UIOUT. | |
662 | ||
663 | UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
664 | instructions corresponding to that source line. When printing a new source | |
665 | line, we do the cleanups for the open chain and open a new cleanup chain for | |
666 | the new source line. If the source line range in LINES is not empty, this | |
667 | function will leave the cleanup chain for the last printed source line open | |
668 | so instructions can be added to it. */ | |
669 | ||
670 | static void | |
671 | btrace_print_lines (struct btrace_line_range lines, struct ui_out *uiout, | |
672 | struct cleanup **ui_item_chain, int flags) | |
673 | { | |
8d297bbf | 674 | print_source_lines_flags psl_flags; |
f94cc897 MM |
675 | int line; |
676 | ||
677 | psl_flags = 0; | |
678 | if (flags & DISASSEMBLY_FILENAME) | |
679 | psl_flags |= PRINT_SOURCE_LINES_FILENAME; | |
680 | ||
681 | for (line = lines.begin; line < lines.end; ++line) | |
682 | { | |
683 | if (*ui_item_chain != NULL) | |
684 | do_cleanups (*ui_item_chain); | |
685 | ||
686 | *ui_item_chain | |
687 | = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); | |
688 | ||
689 | print_source_lines (lines.symtab, line, line + 1, psl_flags); | |
690 | ||
691 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
692 | } | |
693 | } | |
694 | ||
afedecd3 MM |
695 | /* Disassemble a section of the recorded instruction trace. */ |
696 | ||
697 | static void | |
23a7fe75 | 698 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 699 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
700 | const struct btrace_insn_iterator *begin, |
701 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 | 702 | { |
f94cc897 MM |
703 | struct ui_file *stb; |
704 | struct cleanup *cleanups, *ui_item_chain; | |
afedecd3 | 705 | struct gdbarch *gdbarch; |
23a7fe75 | 706 | struct btrace_insn_iterator it; |
f94cc897 | 707 | struct btrace_line_range last_lines; |
afedecd3 | 708 | |
23a7fe75 MM |
709 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
710 | btrace_insn_number (end)); | |
afedecd3 | 711 | |
f94cc897 MM |
712 | flags |= DISASSEMBLY_SPECULATIVE; |
713 | ||
afedecd3 | 714 | gdbarch = target_gdbarch (); |
f94cc897 MM |
715 | stb = mem_fileopen (); |
716 | cleanups = make_cleanup_ui_file_delete (stb); | |
e47ad6c0 | 717 | gdb_disassembler di (gdbarch, stb); |
f94cc897 MM |
718 | last_lines = btrace_mk_line_range (NULL, 0, 0); |
719 | ||
720 | make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); | |
721 | ||
722 | /* UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
723 | instructions corresponding to that line. */ | |
724 | ui_item_chain = NULL; | |
afedecd3 | 725 | |
23a7fe75 | 726 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 727 | { |
23a7fe75 MM |
728 | const struct btrace_insn *insn; |
729 | ||
730 | insn = btrace_insn_get (&it); | |
731 | ||
31fd9caa MM |
732 | /* A NULL instruction indicates a gap in the trace. */ |
733 | if (insn == NULL) | |
734 | { | |
735 | const struct btrace_config *conf; | |
736 | ||
737 | conf = btrace_conf (btinfo); | |
afedecd3 | 738 | |
31fd9caa MM |
739 | /* We have trace so we must have a configuration. */ |
740 | gdb_assert (conf != NULL); | |
741 | ||
742 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
743 | conf->format); | |
744 | } | |
745 | else | |
746 | { | |
f94cc897 | 747 | struct disasm_insn dinsn; |
da8c46d2 | 748 | |
f94cc897 | 749 | if ((flags & DISASSEMBLY_SOURCE) != 0) |
da8c46d2 | 750 | { |
f94cc897 MM |
751 | struct btrace_line_range lines; |
752 | ||
753 | lines = btrace_find_line_range (insn->pc); | |
754 | if (!btrace_line_range_is_empty (lines) | |
755 | && !btrace_line_range_contains_range (last_lines, lines)) | |
756 | { | |
757 | btrace_print_lines (lines, uiout, &ui_item_chain, flags); | |
758 | last_lines = lines; | |
759 | } | |
760 | else if (ui_item_chain == NULL) | |
761 | { | |
762 | ui_item_chain | |
763 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
764 | "src_and_asm_line"); | |
765 | /* No source information. */ | |
766 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
767 | } | |
768 | ||
769 | gdb_assert (ui_item_chain != NULL); | |
da8c46d2 | 770 | } |
da8c46d2 | 771 | |
f94cc897 MM |
772 | memset (&dinsn, 0, sizeof (dinsn)); |
773 | dinsn.number = btrace_insn_number (&it); | |
774 | dinsn.addr = insn->pc; | |
31fd9caa | 775 | |
da8c46d2 | 776 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) |
f94cc897 | 777 | dinsn.is_speculative = 1; |
da8c46d2 | 778 | |
e47ad6c0 | 779 | di.pretty_print_insn (uiout, &dinsn, flags); |
31fd9caa | 780 | } |
afedecd3 | 781 | } |
f94cc897 MM |
782 | |
783 | do_cleanups (cleanups); | |
afedecd3 MM |
784 | } |
785 | ||
786 | /* The to_insn_history method of target record-btrace. */ | |
787 | ||
788 | static void | |
7a6c5609 | 789 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
790 | { |
791 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
792 | struct btrace_insn_history *history; |
793 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
794 | struct cleanup *uiout_cleanup; |
795 | struct ui_out *uiout; | |
23a7fe75 | 796 | unsigned int context, covered; |
afedecd3 MM |
797 | |
798 | uiout = current_uiout; | |
799 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
800 | "insn history"); | |
afedecd3 | 801 | context = abs (size); |
afedecd3 MM |
802 | if (context == 0) |
803 | error (_("Bad record instruction-history-size.")); | |
804 | ||
23a7fe75 MM |
805 | btinfo = require_btrace (); |
806 | history = btinfo->insn_history; | |
807 | if (history == NULL) | |
afedecd3 | 808 | { |
07bbe694 | 809 | struct btrace_insn_iterator *replay; |
afedecd3 | 810 | |
23a7fe75 | 811 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 812 | |
07bbe694 MM |
813 | /* If we're replaying, we start at the replay position. Otherwise, we |
814 | start at the tail of the trace. */ | |
815 | replay = btinfo->replay; | |
816 | if (replay != NULL) | |
817 | begin = *replay; | |
818 | else | |
819 | btrace_insn_end (&begin, btinfo); | |
820 | ||
821 | /* We start from here and expand in the requested direction. Then we | |
822 | expand in the other direction, as well, to fill up any remaining | |
823 | context. */ | |
824 | end = begin; | |
825 | if (size < 0) | |
826 | { | |
827 | /* We want the current position covered, as well. */ | |
828 | covered = btrace_insn_next (&end, 1); | |
829 | covered += btrace_insn_prev (&begin, context - covered); | |
830 | covered += btrace_insn_next (&end, context - covered); | |
831 | } | |
832 | else | |
833 | { | |
834 | covered = btrace_insn_next (&end, context); | |
835 | covered += btrace_insn_prev (&begin, context - covered); | |
836 | } | |
afedecd3 MM |
837 | } |
838 | else | |
839 | { | |
23a7fe75 MM |
840 | begin = history->begin; |
841 | end = history->end; | |
afedecd3 | 842 | |
23a7fe75 MM |
843 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
844 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 845 | |
23a7fe75 MM |
846 | if (size < 0) |
847 | { | |
848 | end = begin; | |
849 | covered = btrace_insn_prev (&begin, context); | |
850 | } | |
851 | else | |
852 | { | |
853 | begin = end; | |
854 | covered = btrace_insn_next (&end, context); | |
855 | } | |
afedecd3 MM |
856 | } |
857 | ||
23a7fe75 | 858 | if (covered > 0) |
31fd9caa | 859 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
860 | else |
861 | { | |
862 | if (size < 0) | |
863 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
864 | else | |
865 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
866 | } | |
afedecd3 | 867 | |
23a7fe75 | 868 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
869 | do_cleanups (uiout_cleanup); |
870 | } | |
871 | ||
872 | /* The to_insn_history_range method of target record-btrace. */ | |
873 | ||
874 | static void | |
4e99c6b7 TT |
875 | record_btrace_insn_history_range (struct target_ops *self, |
876 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
877 | { |
878 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
879 | struct btrace_insn_history *history; |
880 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
881 | struct cleanup *uiout_cleanup; |
882 | struct ui_out *uiout; | |
23a7fe75 MM |
883 | unsigned int low, high; |
884 | int found; | |
afedecd3 MM |
885 | |
886 | uiout = current_uiout; | |
887 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
888 | "insn history"); | |
23a7fe75 MM |
889 | low = from; |
890 | high = to; | |
afedecd3 | 891 | |
23a7fe75 | 892 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
893 | |
894 | /* Check for wrap-arounds. */ | |
23a7fe75 | 895 | if (low != from || high != to) |
afedecd3 MM |
896 | error (_("Bad range.")); |
897 | ||
0688d04e | 898 | if (high < low) |
afedecd3 MM |
899 | error (_("Bad range.")); |
900 | ||
23a7fe75 | 901 | btinfo = require_btrace (); |
afedecd3 | 902 | |
23a7fe75 MM |
903 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
904 | if (found == 0) | |
905 | error (_("Range out of bounds.")); | |
afedecd3 | 906 | |
23a7fe75 MM |
907 | found = btrace_find_insn_by_number (&end, btinfo, high); |
908 | if (found == 0) | |
0688d04e MM |
909 | { |
910 | /* Silently truncate the range. */ | |
911 | btrace_insn_end (&end, btinfo); | |
912 | } | |
913 | else | |
914 | { | |
915 | /* We want both begin and end to be inclusive. */ | |
916 | btrace_insn_next (&end, 1); | |
917 | } | |
afedecd3 | 918 | |
31fd9caa | 919 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 920 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
921 | |
922 | do_cleanups (uiout_cleanup); | |
923 | } | |
924 | ||
925 | /* The to_insn_history_from method of target record-btrace. */ | |
926 | ||
927 | static void | |
9abc3ff3 TT |
928 | record_btrace_insn_history_from (struct target_ops *self, |
929 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
930 | { |
931 | ULONGEST begin, end, context; | |
932 | ||
933 | context = abs (size); | |
0688d04e MM |
934 | if (context == 0) |
935 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
936 | |
937 | if (size < 0) | |
938 | { | |
939 | end = from; | |
940 | ||
941 | if (from < context) | |
942 | begin = 0; | |
943 | else | |
0688d04e | 944 | begin = from - context + 1; |
afedecd3 MM |
945 | } |
946 | else | |
947 | { | |
948 | begin = from; | |
0688d04e | 949 | end = from + context - 1; |
afedecd3 MM |
950 | |
951 | /* Check for wrap-around. */ | |
952 | if (end < begin) | |
953 | end = ULONGEST_MAX; | |
954 | } | |
955 | ||
4e99c6b7 | 956 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
957 | } |
958 | ||
959 | /* Print the instruction number range for a function call history line. */ | |
960 | ||
961 | static void | |
23a7fe75 MM |
962 | btrace_call_history_insn_range (struct ui_out *uiout, |
963 | const struct btrace_function *bfun) | |
afedecd3 | 964 | { |
7acbe133 MM |
965 | unsigned int begin, end, size; |
966 | ||
967 | size = VEC_length (btrace_insn_s, bfun->insn); | |
968 | gdb_assert (size > 0); | |
afedecd3 | 969 | |
23a7fe75 | 970 | begin = bfun->insn_offset; |
7acbe133 | 971 | end = begin + size - 1; |
afedecd3 | 972 | |
23a7fe75 | 973 | ui_out_field_uint (uiout, "insn begin", begin); |
112e8700 | 974 | uiout->text (","); |
23a7fe75 | 975 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
976 | } |
977 | ||
ce0dfbea MM |
978 | /* Compute the lowest and highest source line for the instructions in BFUN |
979 | and return them in PBEGIN and PEND. | |
980 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
981 | result from inlining or macro expansion. */ | |
982 | ||
983 | static void | |
984 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
985 | int *pbegin, int *pend) | |
986 | { | |
987 | struct btrace_insn *insn; | |
988 | struct symtab *symtab; | |
989 | struct symbol *sym; | |
990 | unsigned int idx; | |
991 | int begin, end; | |
992 | ||
993 | begin = INT_MAX; | |
994 | end = INT_MIN; | |
995 | ||
996 | sym = bfun->sym; | |
997 | if (sym == NULL) | |
998 | goto out; | |
999 | ||
1000 | symtab = symbol_symtab (sym); | |
1001 | ||
1002 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
1003 | { | |
1004 | struct symtab_and_line sal; | |
1005 | ||
1006 | sal = find_pc_line (insn->pc, 0); | |
1007 | if (sal.symtab != symtab || sal.line == 0) | |
1008 | continue; | |
1009 | ||
325fac50 PA |
1010 | begin = std::min (begin, sal.line); |
1011 | end = std::max (end, sal.line); | |
ce0dfbea MM |
1012 | } |
1013 | ||
1014 | out: | |
1015 | *pbegin = begin; | |
1016 | *pend = end; | |
1017 | } | |
1018 | ||
afedecd3 MM |
1019 | /* Print the source line information for a function call history line. */ |
1020 | ||
1021 | static void | |
23a7fe75 MM |
1022 | btrace_call_history_src_line (struct ui_out *uiout, |
1023 | const struct btrace_function *bfun) | |
afedecd3 MM |
1024 | { |
1025 | struct symbol *sym; | |
23a7fe75 | 1026 | int begin, end; |
afedecd3 MM |
1027 | |
1028 | sym = bfun->sym; | |
1029 | if (sym == NULL) | |
1030 | return; | |
1031 | ||
112e8700 | 1032 | uiout->field_string ("file", |
08be3fe3 | 1033 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 1034 | |
ce0dfbea | 1035 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 1036 | if (end < begin) |
afedecd3 MM |
1037 | return; |
1038 | ||
112e8700 SM |
1039 | uiout->text (":"); |
1040 | uiout->field_int ("min line", begin); | |
afedecd3 | 1041 | |
23a7fe75 | 1042 | if (end == begin) |
afedecd3 MM |
1043 | return; |
1044 | ||
112e8700 SM |
1045 | uiout->text (","); |
1046 | uiout->field_int ("max line", end); | |
afedecd3 MM |
1047 | } |
1048 | ||
0b722aec MM |
1049 | /* Get the name of a branch trace function. */ |
1050 | ||
1051 | static const char * | |
1052 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
1053 | { | |
1054 | struct minimal_symbol *msym; | |
1055 | struct symbol *sym; | |
1056 | ||
1057 | if (bfun == NULL) | |
1058 | return "??"; | |
1059 | ||
1060 | msym = bfun->msym; | |
1061 | sym = bfun->sym; | |
1062 | ||
1063 | if (sym != NULL) | |
1064 | return SYMBOL_PRINT_NAME (sym); | |
1065 | else if (msym != NULL) | |
efd66ac6 | 1066 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
1067 | else |
1068 | return "??"; | |
1069 | } | |
1070 | ||
afedecd3 MM |
1071 | /* Disassemble a section of the recorded function trace. */ |
1072 | ||
1073 | static void | |
23a7fe75 | 1074 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 1075 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
1076 | const struct btrace_call_iterator *begin, |
1077 | const struct btrace_call_iterator *end, | |
8d297bbf | 1078 | int int_flags) |
afedecd3 | 1079 | { |
23a7fe75 | 1080 | struct btrace_call_iterator it; |
8d297bbf | 1081 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 | 1082 | |
8d297bbf | 1083 | DEBUG ("ftrace (0x%x): [%u; %u)", int_flags, btrace_call_number (begin), |
23a7fe75 | 1084 | btrace_call_number (end)); |
afedecd3 | 1085 | |
23a7fe75 | 1086 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 1087 | { |
23a7fe75 MM |
1088 | const struct btrace_function *bfun; |
1089 | struct minimal_symbol *msym; | |
1090 | struct symbol *sym; | |
1091 | ||
1092 | bfun = btrace_call_get (&it); | |
23a7fe75 | 1093 | sym = bfun->sym; |
0b722aec | 1094 | msym = bfun->msym; |
23a7fe75 | 1095 | |
afedecd3 | 1096 | /* Print the function index. */ |
23a7fe75 | 1097 | ui_out_field_uint (uiout, "index", bfun->number); |
112e8700 | 1098 | uiout->text ("\t"); |
afedecd3 | 1099 | |
31fd9caa MM |
1100 | /* Indicate gaps in the trace. */ |
1101 | if (bfun->errcode != 0) | |
1102 | { | |
1103 | const struct btrace_config *conf; | |
1104 | ||
1105 | conf = btrace_conf (btinfo); | |
1106 | ||
1107 | /* We have trace so we must have a configuration. */ | |
1108 | gdb_assert (conf != NULL); | |
1109 | ||
1110 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
1111 | ||
1112 | continue; | |
1113 | } | |
1114 | ||
8710b709 MM |
1115 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
1116 | { | |
1117 | int level = bfun->level + btinfo->level, i; | |
1118 | ||
1119 | for (i = 0; i < level; ++i) | |
112e8700 | 1120 | uiout->text (" "); |
8710b709 MM |
1121 | } |
1122 | ||
1123 | if (sym != NULL) | |
112e8700 | 1124 | uiout->field_string ("function", SYMBOL_PRINT_NAME (sym)); |
8710b709 | 1125 | else if (msym != NULL) |
112e8700 SM |
1126 | uiout->field_string ("function", MSYMBOL_PRINT_NAME (msym)); |
1127 | else if (!uiout->is_mi_like_p ()) | |
1128 | uiout->field_string ("function", "??"); | |
8710b709 | 1129 | |
1e038f67 | 1130 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 1131 | { |
112e8700 | 1132 | uiout->text (_("\tinst ")); |
23a7fe75 | 1133 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
1134 | } |
1135 | ||
1e038f67 | 1136 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 1137 | { |
112e8700 | 1138 | uiout->text (_("\tat ")); |
23a7fe75 | 1139 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
1140 | } |
1141 | ||
112e8700 | 1142 | uiout->text ("\n"); |
afedecd3 MM |
1143 | } |
1144 | } | |
1145 | ||
1146 | /* The to_call_history method of target record-btrace. */ | |
1147 | ||
1148 | static void | |
8d297bbf | 1149 | record_btrace_call_history (struct target_ops *self, int size, int int_flags) |
afedecd3 MM |
1150 | { |
1151 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1152 | struct btrace_call_history *history; |
1153 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1154 | struct cleanup *uiout_cleanup; |
1155 | struct ui_out *uiout; | |
23a7fe75 | 1156 | unsigned int context, covered; |
8d297bbf | 1157 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1158 | |
1159 | uiout = current_uiout; | |
1160 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1161 | "insn history"); | |
afedecd3 | 1162 | context = abs (size); |
afedecd3 MM |
1163 | if (context == 0) |
1164 | error (_("Bad record function-call-history-size.")); | |
1165 | ||
23a7fe75 MM |
1166 | btinfo = require_btrace (); |
1167 | history = btinfo->call_history; | |
1168 | if (history == NULL) | |
afedecd3 | 1169 | { |
07bbe694 | 1170 | struct btrace_insn_iterator *replay; |
afedecd3 | 1171 | |
8d297bbf | 1172 | DEBUG ("call-history (0x%x): %d", int_flags, size); |
afedecd3 | 1173 | |
07bbe694 MM |
1174 | /* If we're replaying, we start at the replay position. Otherwise, we |
1175 | start at the tail of the trace. */ | |
1176 | replay = btinfo->replay; | |
1177 | if (replay != NULL) | |
1178 | { | |
1179 | begin.function = replay->function; | |
1180 | begin.btinfo = btinfo; | |
1181 | } | |
1182 | else | |
1183 | btrace_call_end (&begin, btinfo); | |
1184 | ||
1185 | /* We start from here and expand in the requested direction. Then we | |
1186 | expand in the other direction, as well, to fill up any remaining | |
1187 | context. */ | |
1188 | end = begin; | |
1189 | if (size < 0) | |
1190 | { | |
1191 | /* We want the current position covered, as well. */ | |
1192 | covered = btrace_call_next (&end, 1); | |
1193 | covered += btrace_call_prev (&begin, context - covered); | |
1194 | covered += btrace_call_next (&end, context - covered); | |
1195 | } | |
1196 | else | |
1197 | { | |
1198 | covered = btrace_call_next (&end, context); | |
1199 | covered += btrace_call_prev (&begin, context- covered); | |
1200 | } | |
afedecd3 MM |
1201 | } |
1202 | else | |
1203 | { | |
23a7fe75 MM |
1204 | begin = history->begin; |
1205 | end = history->end; | |
afedecd3 | 1206 | |
8d297bbf | 1207 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", int_flags, size, |
23a7fe75 | 1208 | btrace_call_number (&begin), btrace_call_number (&end)); |
afedecd3 | 1209 | |
23a7fe75 MM |
1210 | if (size < 0) |
1211 | { | |
1212 | end = begin; | |
1213 | covered = btrace_call_prev (&begin, context); | |
1214 | } | |
1215 | else | |
1216 | { | |
1217 | begin = end; | |
1218 | covered = btrace_call_next (&end, context); | |
1219 | } | |
afedecd3 MM |
1220 | } |
1221 | ||
23a7fe75 | 1222 | if (covered > 0) |
8710b709 | 1223 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1224 | else |
1225 | { | |
1226 | if (size < 0) | |
1227 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
1228 | else | |
1229 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
1230 | } | |
afedecd3 | 1231 | |
23a7fe75 | 1232 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1233 | do_cleanups (uiout_cleanup); |
1234 | } | |
1235 | ||
1236 | /* The to_call_history_range method of target record-btrace. */ | |
1237 | ||
1238 | static void | |
f0d960ea | 1239 | record_btrace_call_history_range (struct target_ops *self, |
8d297bbf PA |
1240 | ULONGEST from, ULONGEST to, |
1241 | int int_flags) | |
afedecd3 MM |
1242 | { |
1243 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1244 | struct btrace_call_history *history; |
1245 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1246 | struct cleanup *uiout_cleanup; |
1247 | struct ui_out *uiout; | |
23a7fe75 MM |
1248 | unsigned int low, high; |
1249 | int found; | |
8d297bbf | 1250 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1251 | |
1252 | uiout = current_uiout; | |
1253 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1254 | "func history"); | |
23a7fe75 MM |
1255 | low = from; |
1256 | high = to; | |
afedecd3 | 1257 | |
8d297bbf | 1258 | DEBUG ("call-history (0x%x): [%u; %u)", int_flags, low, high); |
afedecd3 MM |
1259 | |
1260 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1261 | if (low != from || high != to) |
afedecd3 MM |
1262 | error (_("Bad range.")); |
1263 | ||
0688d04e | 1264 | if (high < low) |
afedecd3 MM |
1265 | error (_("Bad range.")); |
1266 | ||
23a7fe75 | 1267 | btinfo = require_btrace (); |
afedecd3 | 1268 | |
23a7fe75 MM |
1269 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1270 | if (found == 0) | |
1271 | error (_("Range out of bounds.")); | |
afedecd3 | 1272 | |
23a7fe75 MM |
1273 | found = btrace_find_call_by_number (&end, btinfo, high); |
1274 | if (found == 0) | |
0688d04e MM |
1275 | { |
1276 | /* Silently truncate the range. */ | |
1277 | btrace_call_end (&end, btinfo); | |
1278 | } | |
1279 | else | |
1280 | { | |
1281 | /* We want both begin and end to be inclusive. */ | |
1282 | btrace_call_next (&end, 1); | |
1283 | } | |
afedecd3 | 1284 | |
8710b709 | 1285 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1286 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1287 | |
1288 | do_cleanups (uiout_cleanup); | |
1289 | } | |
1290 | ||
1291 | /* The to_call_history_from method of target record-btrace. */ | |
1292 | ||
1293 | static void | |
ec0aea04 | 1294 | record_btrace_call_history_from (struct target_ops *self, |
8d297bbf PA |
1295 | ULONGEST from, int size, |
1296 | int int_flags) | |
afedecd3 MM |
1297 | { |
1298 | ULONGEST begin, end, context; | |
8d297bbf | 1299 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1300 | |
1301 | context = abs (size); | |
0688d04e MM |
1302 | if (context == 0) |
1303 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1304 | |
1305 | if (size < 0) | |
1306 | { | |
1307 | end = from; | |
1308 | ||
1309 | if (from < context) | |
1310 | begin = 0; | |
1311 | else | |
0688d04e | 1312 | begin = from - context + 1; |
afedecd3 MM |
1313 | } |
1314 | else | |
1315 | { | |
1316 | begin = from; | |
0688d04e | 1317 | end = from + context - 1; |
afedecd3 MM |
1318 | |
1319 | /* Check for wrap-around. */ | |
1320 | if (end < begin) | |
1321 | end = ULONGEST_MAX; | |
1322 | } | |
1323 | ||
f0d960ea | 1324 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1325 | } |
1326 | ||
07bbe694 MM |
1327 | /* The to_record_is_replaying method of target record-btrace. */ |
1328 | ||
1329 | static int | |
a52eab48 | 1330 | record_btrace_is_replaying (struct target_ops *self, ptid_t ptid) |
07bbe694 MM |
1331 | { |
1332 | struct thread_info *tp; | |
1333 | ||
034f788c | 1334 | ALL_NON_EXITED_THREADS (tp) |
a52eab48 | 1335 | if (ptid_match (tp->ptid, ptid) && btrace_is_replaying (tp)) |
07bbe694 MM |
1336 | return 1; |
1337 | ||
1338 | return 0; | |
1339 | } | |
1340 | ||
7ff27e9b MM |
1341 | /* The to_record_will_replay method of target record-btrace. */ |
1342 | ||
1343 | static int | |
1344 | record_btrace_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1345 | { | |
1346 | return dir == EXEC_REVERSE || record_btrace_is_replaying (self, ptid); | |
1347 | } | |
1348 | ||
633785ff MM |
1349 | /* The to_xfer_partial method of target record-btrace. */ |
1350 | ||
9b409511 | 1351 | static enum target_xfer_status |
633785ff MM |
1352 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1353 | const char *annex, gdb_byte *readbuf, | |
1354 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1355 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1356 | { |
1357 | struct target_ops *t; | |
1358 | ||
1359 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1360 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1361 | && !record_btrace_generating_corefile |
4d10e986 | 1362 | && record_btrace_is_replaying (ops, inferior_ptid)) |
633785ff MM |
1363 | { |
1364 | switch (object) | |
1365 | { | |
1366 | case TARGET_OBJECT_MEMORY: | |
1367 | { | |
1368 | struct target_section *section; | |
1369 | ||
1370 | /* We do not allow writing memory in general. */ | |
1371 | if (writebuf != NULL) | |
9b409511 YQ |
1372 | { |
1373 | *xfered_len = len; | |
bc113b4e | 1374 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1375 | } |
633785ff MM |
1376 | |
1377 | /* We allow reading readonly memory. */ | |
1378 | section = target_section_by_addr (ops, offset); | |
1379 | if (section != NULL) | |
1380 | { | |
1381 | /* Check if the section we found is readonly. */ | |
1382 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1383 | section->the_bfd_section) | |
1384 | & SEC_READONLY) != 0) | |
1385 | { | |
1386 | /* Truncate the request to fit into this section. */ | |
325fac50 | 1387 | len = std::min (len, section->endaddr - offset); |
633785ff MM |
1388 | break; |
1389 | } | |
1390 | } | |
1391 | ||
9b409511 | 1392 | *xfered_len = len; |
bc113b4e | 1393 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1394 | } |
1395 | } | |
1396 | } | |
1397 | ||
1398 | /* Forward the request. */ | |
e75fdfca TT |
1399 | ops = ops->beneath; |
1400 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1401 | offset, len, xfered_len); | |
633785ff MM |
1402 | } |
1403 | ||
1404 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1405 | ||
1406 | static int | |
1407 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1408 | struct gdbarch *gdbarch, | |
1409 | struct bp_target_info *bp_tgt) | |
1410 | { | |
67b5c0c1 MM |
1411 | const char *old; |
1412 | int ret; | |
633785ff MM |
1413 | |
1414 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1415 | duration of this function. */ | |
67b5c0c1 MM |
1416 | old = replay_memory_access; |
1417 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1418 | |
1419 | ret = 0; | |
492d29ea PA |
1420 | TRY |
1421 | { | |
1422 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1423 | } | |
492d29ea PA |
1424 | CATCH (except, RETURN_MASK_ALL) |
1425 | { | |
6c63c96a | 1426 | replay_memory_access = old; |
492d29ea PA |
1427 | throw_exception (except); |
1428 | } | |
1429 | END_CATCH | |
6c63c96a | 1430 | replay_memory_access = old; |
633785ff MM |
1431 | |
1432 | return ret; | |
1433 | } | |
1434 | ||
1435 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1436 | ||
1437 | static int | |
1438 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1439 | struct gdbarch *gdbarch, | |
73971819 PA |
1440 | struct bp_target_info *bp_tgt, |
1441 | enum remove_bp_reason reason) | |
633785ff | 1442 | { |
67b5c0c1 MM |
1443 | const char *old; |
1444 | int ret; | |
633785ff MM |
1445 | |
1446 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1447 | duration of this function. */ | |
67b5c0c1 MM |
1448 | old = replay_memory_access; |
1449 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1450 | |
1451 | ret = 0; | |
492d29ea PA |
1452 | TRY |
1453 | { | |
73971819 PA |
1454 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt, |
1455 | reason); | |
492d29ea | 1456 | } |
492d29ea PA |
1457 | CATCH (except, RETURN_MASK_ALL) |
1458 | { | |
6c63c96a | 1459 | replay_memory_access = old; |
492d29ea PA |
1460 | throw_exception (except); |
1461 | } | |
1462 | END_CATCH | |
6c63c96a | 1463 | replay_memory_access = old; |
633785ff MM |
1464 | |
1465 | return ret; | |
1466 | } | |
1467 | ||
1f3ef581 MM |
1468 | /* The to_fetch_registers method of target record-btrace. */ |
1469 | ||
1470 | static void | |
1471 | record_btrace_fetch_registers (struct target_ops *ops, | |
1472 | struct regcache *regcache, int regno) | |
1473 | { | |
1474 | struct btrace_insn_iterator *replay; | |
1475 | struct thread_info *tp; | |
1476 | ||
1477 | tp = find_thread_ptid (inferior_ptid); | |
1478 | gdb_assert (tp != NULL); | |
1479 | ||
1480 | replay = tp->btrace.replay; | |
aef92902 | 1481 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1482 | { |
1483 | const struct btrace_insn *insn; | |
1484 | struct gdbarch *gdbarch; | |
1485 | int pcreg; | |
1486 | ||
1487 | gdbarch = get_regcache_arch (regcache); | |
1488 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1489 | if (pcreg < 0) | |
1490 | return; | |
1491 | ||
1492 | /* We can only provide the PC register. */ | |
1493 | if (regno >= 0 && regno != pcreg) | |
1494 | return; | |
1495 | ||
1496 | insn = btrace_insn_get (replay); | |
1497 | gdb_assert (insn != NULL); | |
1498 | ||
1499 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1500 | } | |
1501 | else | |
1502 | { | |
e75fdfca | 1503 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1504 | |
e75fdfca | 1505 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1506 | } |
1507 | } | |
1508 | ||
1509 | /* The to_store_registers method of target record-btrace. */ | |
1510 | ||
1511 | static void | |
1512 | record_btrace_store_registers (struct target_ops *ops, | |
1513 | struct regcache *regcache, int regno) | |
1514 | { | |
1515 | struct target_ops *t; | |
1516 | ||
a52eab48 | 1517 | if (!record_btrace_generating_corefile |
4d10e986 MM |
1518 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1519 | error (_("Cannot write registers while replaying.")); | |
1f3ef581 MM |
1520 | |
1521 | gdb_assert (may_write_registers != 0); | |
1522 | ||
e75fdfca TT |
1523 | t = ops->beneath; |
1524 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1525 | } |
1526 | ||
1527 | /* The to_prepare_to_store method of target record-btrace. */ | |
1528 | ||
1529 | static void | |
1530 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1531 | struct regcache *regcache) | |
1532 | { | |
1533 | struct target_ops *t; | |
1534 | ||
a52eab48 | 1535 | if (!record_btrace_generating_corefile |
4d10e986 | 1536 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1f3ef581 MM |
1537 | return; |
1538 | ||
e75fdfca TT |
1539 | t = ops->beneath; |
1540 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1541 | } |
1542 | ||
0b722aec MM |
1543 | /* The branch trace frame cache. */ |
1544 | ||
1545 | struct btrace_frame_cache | |
1546 | { | |
1547 | /* The thread. */ | |
1548 | struct thread_info *tp; | |
1549 | ||
1550 | /* The frame info. */ | |
1551 | struct frame_info *frame; | |
1552 | ||
1553 | /* The branch trace function segment. */ | |
1554 | const struct btrace_function *bfun; | |
1555 | }; | |
1556 | ||
1557 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1558 | ||
1559 | static htab_t bfcache; | |
1560 | ||
1561 | /* hash_f for htab_create_alloc of bfcache. */ | |
1562 | ||
1563 | static hashval_t | |
1564 | bfcache_hash (const void *arg) | |
1565 | { | |
19ba03f4 SM |
1566 | const struct btrace_frame_cache *cache |
1567 | = (const struct btrace_frame_cache *) arg; | |
0b722aec MM |
1568 | |
1569 | return htab_hash_pointer (cache->frame); | |
1570 | } | |
1571 | ||
1572 | /* eq_f for htab_create_alloc of bfcache. */ | |
1573 | ||
1574 | static int | |
1575 | bfcache_eq (const void *arg1, const void *arg2) | |
1576 | { | |
19ba03f4 SM |
1577 | const struct btrace_frame_cache *cache1 |
1578 | = (const struct btrace_frame_cache *) arg1; | |
1579 | const struct btrace_frame_cache *cache2 | |
1580 | = (const struct btrace_frame_cache *) arg2; | |
0b722aec MM |
1581 | |
1582 | return cache1->frame == cache2->frame; | |
1583 | } | |
1584 | ||
1585 | /* Create a new btrace frame cache. */ | |
1586 | ||
1587 | static struct btrace_frame_cache * | |
1588 | bfcache_new (struct frame_info *frame) | |
1589 | { | |
1590 | struct btrace_frame_cache *cache; | |
1591 | void **slot; | |
1592 | ||
1593 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1594 | cache->frame = frame; | |
1595 | ||
1596 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1597 | gdb_assert (*slot == NULL); | |
1598 | *slot = cache; | |
1599 | ||
1600 | return cache; | |
1601 | } | |
1602 | ||
1603 | /* Extract the branch trace function from a branch trace frame. */ | |
1604 | ||
1605 | static const struct btrace_function * | |
1606 | btrace_get_frame_function (struct frame_info *frame) | |
1607 | { | |
1608 | const struct btrace_frame_cache *cache; | |
1609 | const struct btrace_function *bfun; | |
1610 | struct btrace_frame_cache pattern; | |
1611 | void **slot; | |
1612 | ||
1613 | pattern.frame = frame; | |
1614 | ||
1615 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1616 | if (slot == NULL) | |
1617 | return NULL; | |
1618 | ||
19ba03f4 | 1619 | cache = (const struct btrace_frame_cache *) *slot; |
0b722aec MM |
1620 | return cache->bfun; |
1621 | } | |
1622 | ||
cecac1ab MM |
1623 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1624 | ||
1625 | static enum unwind_stop_reason | |
1626 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1627 | void **this_cache) | |
1628 | { | |
0b722aec MM |
1629 | const struct btrace_frame_cache *cache; |
1630 | const struct btrace_function *bfun; | |
1631 | ||
19ba03f4 | 1632 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1633 | bfun = cache->bfun; |
1634 | gdb_assert (bfun != NULL); | |
1635 | ||
1636 | if (bfun->up == NULL) | |
1637 | return UNWIND_UNAVAILABLE; | |
1638 | ||
1639 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1640 | } |
1641 | ||
1642 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1643 | ||
1644 | static void | |
1645 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1646 | struct frame_id *this_id) | |
1647 | { | |
0b722aec MM |
1648 | const struct btrace_frame_cache *cache; |
1649 | const struct btrace_function *bfun; | |
1650 | CORE_ADDR code, special; | |
1651 | ||
19ba03f4 | 1652 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1653 | |
1654 | bfun = cache->bfun; | |
1655 | gdb_assert (bfun != NULL); | |
1656 | ||
1657 | while (bfun->segment.prev != NULL) | |
1658 | bfun = bfun->segment.prev; | |
1659 | ||
1660 | code = get_frame_func (this_frame); | |
1661 | special = bfun->number; | |
1662 | ||
1663 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1664 | ||
1665 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1666 | btrace_get_bfun_name (cache->bfun), | |
1667 | core_addr_to_string_nz (this_id->code_addr), | |
1668 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1669 | } |
1670 | ||
1671 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1672 | ||
1673 | static struct value * | |
1674 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1675 | void **this_cache, | |
1676 | int regnum) | |
1677 | { | |
0b722aec MM |
1678 | const struct btrace_frame_cache *cache; |
1679 | const struct btrace_function *bfun, *caller; | |
1680 | const struct btrace_insn *insn; | |
1681 | struct gdbarch *gdbarch; | |
1682 | CORE_ADDR pc; | |
1683 | int pcreg; | |
1684 | ||
1685 | gdbarch = get_frame_arch (this_frame); | |
1686 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1687 | if (pcreg < 0 || regnum != pcreg) | |
1688 | throw_error (NOT_AVAILABLE_ERROR, | |
1689 | _("Registers are not available in btrace record history")); | |
1690 | ||
19ba03f4 | 1691 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1692 | bfun = cache->bfun; |
1693 | gdb_assert (bfun != NULL); | |
1694 | ||
1695 | caller = bfun->up; | |
1696 | if (caller == NULL) | |
1697 | throw_error (NOT_AVAILABLE_ERROR, | |
1698 | _("No caller in btrace record history")); | |
1699 | ||
1700 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1701 | { | |
1702 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1703 | pc = insn->pc; | |
1704 | } | |
1705 | else | |
1706 | { | |
1707 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1708 | pc = insn->pc; | |
1709 | ||
1710 | pc += gdb_insn_length (gdbarch, pc); | |
1711 | } | |
1712 | ||
1713 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1714 | btrace_get_bfun_name (bfun), bfun->level, | |
1715 | core_addr_to_string_nz (pc)); | |
1716 | ||
1717 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1718 | } |
1719 | ||
1720 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1721 | ||
1722 | static int | |
1723 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1724 | struct frame_info *this_frame, | |
1725 | void **this_cache) | |
1726 | { | |
0b722aec MM |
1727 | const struct btrace_function *bfun; |
1728 | struct btrace_frame_cache *cache; | |
cecac1ab | 1729 | struct thread_info *tp; |
0b722aec | 1730 | struct frame_info *next; |
cecac1ab MM |
1731 | |
1732 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1733 | tp = find_thread_ptid (inferior_ptid); | |
1734 | gdb_assert (tp != NULL); | |
1735 | ||
0b722aec MM |
1736 | bfun = NULL; |
1737 | next = get_next_frame (this_frame); | |
1738 | if (next == NULL) | |
1739 | { | |
1740 | const struct btrace_insn_iterator *replay; | |
1741 | ||
1742 | replay = tp->btrace.replay; | |
1743 | if (replay != NULL) | |
1744 | bfun = replay->function; | |
1745 | } | |
1746 | else | |
1747 | { | |
1748 | const struct btrace_function *callee; | |
1749 | ||
1750 | callee = btrace_get_frame_function (next); | |
1751 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1752 | bfun = callee->up; | |
1753 | } | |
1754 | ||
1755 | if (bfun == NULL) | |
1756 | return 0; | |
1757 | ||
1758 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1759 | btrace_get_bfun_name (bfun), bfun->level); | |
1760 | ||
1761 | /* This is our frame. Initialize the frame cache. */ | |
1762 | cache = bfcache_new (this_frame); | |
1763 | cache->tp = tp; | |
1764 | cache->bfun = bfun; | |
1765 | ||
1766 | *this_cache = cache; | |
1767 | return 1; | |
1768 | } | |
1769 | ||
1770 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1771 | ||
1772 | static int | |
1773 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1774 | struct frame_info *this_frame, | |
1775 | void **this_cache) | |
1776 | { | |
1777 | const struct btrace_function *bfun, *callee; | |
1778 | struct btrace_frame_cache *cache; | |
1779 | struct frame_info *next; | |
1780 | ||
1781 | next = get_next_frame (this_frame); | |
1782 | if (next == NULL) | |
1783 | return 0; | |
1784 | ||
1785 | callee = btrace_get_frame_function (next); | |
1786 | if (callee == NULL) | |
1787 | return 0; | |
1788 | ||
1789 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1790 | return 0; | |
1791 | ||
1792 | bfun = callee->up; | |
1793 | if (bfun == NULL) | |
1794 | return 0; | |
1795 | ||
1796 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1797 | btrace_get_bfun_name (bfun), bfun->level); | |
1798 | ||
1799 | /* This is our frame. Initialize the frame cache. */ | |
1800 | cache = bfcache_new (this_frame); | |
1801 | cache->tp = find_thread_ptid (inferior_ptid); | |
1802 | cache->bfun = bfun; | |
1803 | ||
1804 | *this_cache = cache; | |
1805 | return 1; | |
1806 | } | |
1807 | ||
1808 | static void | |
1809 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1810 | { | |
1811 | struct btrace_frame_cache *cache; | |
1812 | void **slot; | |
1813 | ||
19ba03f4 | 1814 | cache = (struct btrace_frame_cache *) this_cache; |
0b722aec MM |
1815 | |
1816 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1817 | gdb_assert (slot != NULL); | |
1818 | ||
1819 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1820 | } |
1821 | ||
1822 | /* btrace recording does not store previous memory content, neither the stack | |
1823 | frames content. Any unwinding would return errorneous results as the stack | |
1824 | contents no longer matches the changed PC value restored from history. | |
1825 | Therefore this unwinder reports any possibly unwound registers as | |
1826 | <unavailable>. */ | |
1827 | ||
0b722aec | 1828 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1829 | { |
1830 | NORMAL_FRAME, | |
1831 | record_btrace_frame_unwind_stop_reason, | |
1832 | record_btrace_frame_this_id, | |
1833 | record_btrace_frame_prev_register, | |
1834 | NULL, | |
0b722aec MM |
1835 | record_btrace_frame_sniffer, |
1836 | record_btrace_frame_dealloc_cache | |
1837 | }; | |
1838 | ||
1839 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1840 | { | |
1841 | TAILCALL_FRAME, | |
1842 | record_btrace_frame_unwind_stop_reason, | |
1843 | record_btrace_frame_this_id, | |
1844 | record_btrace_frame_prev_register, | |
1845 | NULL, | |
1846 | record_btrace_tailcall_frame_sniffer, | |
1847 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1848 | }; |
b2f4cfde | 1849 | |
ac01945b TT |
1850 | /* Implement the to_get_unwinder method. */ |
1851 | ||
1852 | static const struct frame_unwind * | |
1853 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1854 | { | |
1855 | return &record_btrace_frame_unwind; | |
1856 | } | |
1857 | ||
1858 | /* Implement the to_get_tailcall_unwinder method. */ | |
1859 | ||
1860 | static const struct frame_unwind * | |
1861 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1862 | { | |
1863 | return &record_btrace_tailcall_frame_unwind; | |
1864 | } | |
1865 | ||
987e68b1 MM |
1866 | /* Return a human-readable string for FLAG. */ |
1867 | ||
1868 | static const char * | |
1869 | btrace_thread_flag_to_str (enum btrace_thread_flag flag) | |
1870 | { | |
1871 | switch (flag) | |
1872 | { | |
1873 | case BTHR_STEP: | |
1874 | return "step"; | |
1875 | ||
1876 | case BTHR_RSTEP: | |
1877 | return "reverse-step"; | |
1878 | ||
1879 | case BTHR_CONT: | |
1880 | return "cont"; | |
1881 | ||
1882 | case BTHR_RCONT: | |
1883 | return "reverse-cont"; | |
1884 | ||
1885 | case BTHR_STOP: | |
1886 | return "stop"; | |
1887 | } | |
1888 | ||
1889 | return "<invalid>"; | |
1890 | } | |
1891 | ||
52834460 MM |
1892 | /* Indicate that TP should be resumed according to FLAG. */ |
1893 | ||
1894 | static void | |
1895 | record_btrace_resume_thread (struct thread_info *tp, | |
1896 | enum btrace_thread_flag flag) | |
1897 | { | |
1898 | struct btrace_thread_info *btinfo; | |
1899 | ||
43792cf0 | 1900 | DEBUG ("resuming thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 | 1901 | target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag)); |
52834460 MM |
1902 | |
1903 | btinfo = &tp->btrace; | |
1904 | ||
52834460 MM |
1905 | /* Fetch the latest branch trace. */ |
1906 | btrace_fetch (tp); | |
1907 | ||
0ca912df MM |
1908 | /* A resume request overwrites a preceding resume or stop request. */ |
1909 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1910 | btinfo->flags |= flag; |
1911 | } | |
1912 | ||
ec71cc2f MM |
1913 | /* Get the current frame for TP. */ |
1914 | ||
1915 | static struct frame_info * | |
1916 | get_thread_current_frame (struct thread_info *tp) | |
1917 | { | |
1918 | struct frame_info *frame; | |
1919 | ptid_t old_inferior_ptid; | |
1920 | int executing; | |
1921 | ||
1922 | /* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */ | |
1923 | old_inferior_ptid = inferior_ptid; | |
1924 | inferior_ptid = tp->ptid; | |
1925 | ||
1926 | /* Clear the executing flag to allow changes to the current frame. | |
1927 | We are not actually running, yet. We just started a reverse execution | |
1928 | command or a record goto command. | |
1929 | For the latter, EXECUTING is false and this has no effect. | |
1930 | For the former, EXECUTING is true and we're in to_wait, about to | |
1931 | move the thread. Since we need to recompute the stack, we temporarily | |
1932 | set EXECUTING to flase. */ | |
1933 | executing = is_executing (inferior_ptid); | |
1934 | set_executing (inferior_ptid, 0); | |
1935 | ||
1936 | frame = NULL; | |
1937 | TRY | |
1938 | { | |
1939 | frame = get_current_frame (); | |
1940 | } | |
1941 | CATCH (except, RETURN_MASK_ALL) | |
1942 | { | |
1943 | /* Restore the previous execution state. */ | |
1944 | set_executing (inferior_ptid, executing); | |
1945 | ||
1946 | /* Restore the previous inferior_ptid. */ | |
1947 | inferior_ptid = old_inferior_ptid; | |
1948 | ||
1949 | throw_exception (except); | |
1950 | } | |
1951 | END_CATCH | |
1952 | ||
1953 | /* Restore the previous execution state. */ | |
1954 | set_executing (inferior_ptid, executing); | |
1955 | ||
1956 | /* Restore the previous inferior_ptid. */ | |
1957 | inferior_ptid = old_inferior_ptid; | |
1958 | ||
1959 | return frame; | |
1960 | } | |
1961 | ||
52834460 MM |
1962 | /* Start replaying a thread. */ |
1963 | ||
1964 | static struct btrace_insn_iterator * | |
1965 | record_btrace_start_replaying (struct thread_info *tp) | |
1966 | { | |
52834460 MM |
1967 | struct btrace_insn_iterator *replay; |
1968 | struct btrace_thread_info *btinfo; | |
52834460 MM |
1969 | |
1970 | btinfo = &tp->btrace; | |
1971 | replay = NULL; | |
1972 | ||
1973 | /* We can't start replaying without trace. */ | |
1974 | if (btinfo->begin == NULL) | |
1975 | return NULL; | |
1976 | ||
52834460 MM |
1977 | /* GDB stores the current frame_id when stepping in order to detects steps |
1978 | into subroutines. | |
1979 | Since frames are computed differently when we're replaying, we need to | |
1980 | recompute those stored frames and fix them up so we can still detect | |
1981 | subroutines after we started replaying. */ | |
492d29ea | 1982 | TRY |
52834460 MM |
1983 | { |
1984 | struct frame_info *frame; | |
1985 | struct frame_id frame_id; | |
1986 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1987 | ||
1988 | /* The current frame without replaying - computed via normal unwind. */ | |
ec71cc2f | 1989 | frame = get_thread_current_frame (tp); |
52834460 MM |
1990 | frame_id = get_frame_id (frame); |
1991 | ||
1992 | /* Check if we need to update any stepping-related frame id's. */ | |
1993 | upd_step_frame_id = frame_id_eq (frame_id, | |
1994 | tp->control.step_frame_id); | |
1995 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1996 | tp->control.step_stack_frame_id); | |
1997 | ||
1998 | /* We start replaying at the end of the branch trace. This corresponds | |
1999 | to the current instruction. */ | |
8d749320 | 2000 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
2001 | btrace_insn_end (replay, btinfo); |
2002 | ||
31fd9caa MM |
2003 | /* Skip gaps at the end of the trace. */ |
2004 | while (btrace_insn_get (replay) == NULL) | |
2005 | { | |
2006 | unsigned int steps; | |
2007 | ||
2008 | steps = btrace_insn_prev (replay, 1); | |
2009 | if (steps == 0) | |
2010 | error (_("No trace.")); | |
2011 | } | |
2012 | ||
52834460 MM |
2013 | /* We're not replaying, yet. */ |
2014 | gdb_assert (btinfo->replay == NULL); | |
2015 | btinfo->replay = replay; | |
2016 | ||
2017 | /* Make sure we're not using any stale registers. */ | |
2018 | registers_changed_ptid (tp->ptid); | |
2019 | ||
2020 | /* The current frame with replaying - computed via btrace unwind. */ | |
ec71cc2f | 2021 | frame = get_thread_current_frame (tp); |
52834460 MM |
2022 | frame_id = get_frame_id (frame); |
2023 | ||
2024 | /* Replace stepping related frames where necessary. */ | |
2025 | if (upd_step_frame_id) | |
2026 | tp->control.step_frame_id = frame_id; | |
2027 | if (upd_step_stack_frame_id) | |
2028 | tp->control.step_stack_frame_id = frame_id; | |
2029 | } | |
492d29ea | 2030 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
2031 | { |
2032 | xfree (btinfo->replay); | |
2033 | btinfo->replay = NULL; | |
2034 | ||
2035 | registers_changed_ptid (tp->ptid); | |
2036 | ||
2037 | throw_exception (except); | |
2038 | } | |
492d29ea | 2039 | END_CATCH |
52834460 MM |
2040 | |
2041 | return replay; | |
2042 | } | |
2043 | ||
2044 | /* Stop replaying a thread. */ | |
2045 | ||
2046 | static void | |
2047 | record_btrace_stop_replaying (struct thread_info *tp) | |
2048 | { | |
2049 | struct btrace_thread_info *btinfo; | |
2050 | ||
2051 | btinfo = &tp->btrace; | |
2052 | ||
2053 | xfree (btinfo->replay); | |
2054 | btinfo->replay = NULL; | |
2055 | ||
2056 | /* Make sure we're not leaving any stale registers. */ | |
2057 | registers_changed_ptid (tp->ptid); | |
2058 | } | |
2059 | ||
e3cfc1c7 MM |
2060 | /* Stop replaying TP if it is at the end of its execution history. */ |
2061 | ||
2062 | static void | |
2063 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
2064 | { | |
2065 | struct btrace_insn_iterator *replay, end; | |
2066 | struct btrace_thread_info *btinfo; | |
2067 | ||
2068 | btinfo = &tp->btrace; | |
2069 | replay = btinfo->replay; | |
2070 | ||
2071 | if (replay == NULL) | |
2072 | return; | |
2073 | ||
2074 | btrace_insn_end (&end, btinfo); | |
2075 | ||
2076 | if (btrace_insn_cmp (replay, &end) == 0) | |
2077 | record_btrace_stop_replaying (tp); | |
2078 | } | |
2079 | ||
b2f4cfde MM |
2080 | /* The to_resume method of target record-btrace. */ |
2081 | ||
2082 | static void | |
2083 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2084 | enum gdb_signal signal) | |
2085 | { | |
0ca912df | 2086 | struct thread_info *tp; |
d2939ba2 | 2087 | enum btrace_thread_flag flag, cflag; |
52834460 | 2088 | |
987e68b1 MM |
2089 | DEBUG ("resume %s: %s%s", target_pid_to_str (ptid), |
2090 | execution_direction == EXEC_REVERSE ? "reverse-" : "", | |
2091 | step ? "step" : "cont"); | |
52834460 | 2092 | |
0ca912df MM |
2093 | /* Store the execution direction of the last resume. |
2094 | ||
2095 | If there is more than one to_resume call, we have to rely on infrun | |
2096 | to not change the execution direction in-between. */ | |
70ad5bff MM |
2097 | record_btrace_resume_exec_dir = execution_direction; |
2098 | ||
0ca912df | 2099 | /* As long as we're not replaying, just forward the request. |
52834460 | 2100 | |
0ca912df MM |
2101 | For non-stop targets this means that no thread is replaying. In order to |
2102 | make progress, we may need to explicitly move replaying threads to the end | |
2103 | of their execution history. */ | |
a52eab48 MM |
2104 | if ((execution_direction != EXEC_REVERSE) |
2105 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2106 | { |
e75fdfca | 2107 | ops = ops->beneath; |
04c4fe8c MM |
2108 | ops->to_resume (ops, ptid, step, signal); |
2109 | return; | |
b2f4cfde MM |
2110 | } |
2111 | ||
52834460 | 2112 | /* Compute the btrace thread flag for the requested move. */ |
d2939ba2 MM |
2113 | if (execution_direction == EXEC_REVERSE) |
2114 | { | |
2115 | flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP; | |
2116 | cflag = BTHR_RCONT; | |
2117 | } | |
52834460 | 2118 | else |
d2939ba2 MM |
2119 | { |
2120 | flag = step == 0 ? BTHR_CONT : BTHR_STEP; | |
2121 | cflag = BTHR_CONT; | |
2122 | } | |
52834460 | 2123 | |
52834460 | 2124 | /* We just indicate the resume intent here. The actual stepping happens in |
d2939ba2 MM |
2125 | record_btrace_wait below. |
2126 | ||
2127 | For all-stop targets, we only step INFERIOR_PTID and continue others. */ | |
2128 | if (!target_is_non_stop_p ()) | |
2129 | { | |
2130 | gdb_assert (ptid_match (inferior_ptid, ptid)); | |
2131 | ||
2132 | ALL_NON_EXITED_THREADS (tp) | |
2133 | if (ptid_match (tp->ptid, ptid)) | |
2134 | { | |
2135 | if (ptid_match (tp->ptid, inferior_ptid)) | |
2136 | record_btrace_resume_thread (tp, flag); | |
2137 | else | |
2138 | record_btrace_resume_thread (tp, cflag); | |
2139 | } | |
2140 | } | |
2141 | else | |
2142 | { | |
2143 | ALL_NON_EXITED_THREADS (tp) | |
2144 | if (ptid_match (tp->ptid, ptid)) | |
2145 | record_btrace_resume_thread (tp, flag); | |
2146 | } | |
70ad5bff MM |
2147 | |
2148 | /* Async support. */ | |
2149 | if (target_can_async_p ()) | |
2150 | { | |
6a3753b3 | 2151 | target_async (1); |
70ad5bff MM |
2152 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
2153 | } | |
52834460 MM |
2154 | } |
2155 | ||
85ad3aaf PA |
2156 | /* The to_commit_resume method of target record-btrace. */ |
2157 | ||
2158 | static void | |
2159 | record_btrace_commit_resume (struct target_ops *ops) | |
2160 | { | |
2161 | if ((execution_direction != EXEC_REVERSE) | |
2162 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
2163 | ops->beneath->to_commit_resume (ops->beneath); | |
2164 | } | |
2165 | ||
987e68b1 MM |
2166 | /* Cancel resuming TP. */ |
2167 | ||
2168 | static void | |
2169 | record_btrace_cancel_resume (struct thread_info *tp) | |
2170 | { | |
2171 | enum btrace_thread_flag flags; | |
2172 | ||
2173 | flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP); | |
2174 | if (flags == 0) | |
2175 | return; | |
2176 | ||
43792cf0 PA |
2177 | DEBUG ("cancel resume thread %s (%s): %x (%s)", |
2178 | print_thread_id (tp), | |
987e68b1 MM |
2179 | target_pid_to_str (tp->ptid), flags, |
2180 | btrace_thread_flag_to_str (flags)); | |
2181 | ||
2182 | tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP); | |
e3cfc1c7 | 2183 | record_btrace_stop_replaying_at_end (tp); |
52834460 MM |
2184 | } |
2185 | ||
2186 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
2187 | ||
2188 | static struct target_waitstatus | |
2189 | btrace_step_no_history (void) | |
2190 | { | |
2191 | struct target_waitstatus status; | |
2192 | ||
2193 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
2194 | ||
2195 | return status; | |
2196 | } | |
2197 | ||
2198 | /* Return a target_waitstatus indicating that a step finished. */ | |
2199 | ||
2200 | static struct target_waitstatus | |
2201 | btrace_step_stopped (void) | |
2202 | { | |
2203 | struct target_waitstatus status; | |
2204 | ||
2205 | status.kind = TARGET_WAITKIND_STOPPED; | |
2206 | status.value.sig = GDB_SIGNAL_TRAP; | |
2207 | ||
2208 | return status; | |
2209 | } | |
2210 | ||
6e4879f0 MM |
2211 | /* Return a target_waitstatus indicating that a thread was stopped as |
2212 | requested. */ | |
2213 | ||
2214 | static struct target_waitstatus | |
2215 | btrace_step_stopped_on_request (void) | |
2216 | { | |
2217 | struct target_waitstatus status; | |
2218 | ||
2219 | status.kind = TARGET_WAITKIND_STOPPED; | |
2220 | status.value.sig = GDB_SIGNAL_0; | |
2221 | ||
2222 | return status; | |
2223 | } | |
2224 | ||
d825d248 MM |
2225 | /* Return a target_waitstatus indicating a spurious stop. */ |
2226 | ||
2227 | static struct target_waitstatus | |
2228 | btrace_step_spurious (void) | |
2229 | { | |
2230 | struct target_waitstatus status; | |
2231 | ||
2232 | status.kind = TARGET_WAITKIND_SPURIOUS; | |
2233 | ||
2234 | return status; | |
2235 | } | |
2236 | ||
e3cfc1c7 MM |
2237 | /* Return a target_waitstatus indicating that the thread was not resumed. */ |
2238 | ||
2239 | static struct target_waitstatus | |
2240 | btrace_step_no_resumed (void) | |
2241 | { | |
2242 | struct target_waitstatus status; | |
2243 | ||
2244 | status.kind = TARGET_WAITKIND_NO_RESUMED; | |
2245 | ||
2246 | return status; | |
2247 | } | |
2248 | ||
2249 | /* Return a target_waitstatus indicating that we should wait again. */ | |
2250 | ||
2251 | static struct target_waitstatus | |
2252 | btrace_step_again (void) | |
2253 | { | |
2254 | struct target_waitstatus status; | |
2255 | ||
2256 | status.kind = TARGET_WAITKIND_IGNORE; | |
2257 | ||
2258 | return status; | |
2259 | } | |
2260 | ||
52834460 MM |
2261 | /* Clear the record histories. */ |
2262 | ||
2263 | static void | |
2264 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
2265 | { | |
2266 | xfree (btinfo->insn_history); | |
2267 | xfree (btinfo->call_history); | |
2268 | ||
2269 | btinfo->insn_history = NULL; | |
2270 | btinfo->call_history = NULL; | |
2271 | } | |
2272 | ||
3c615f99 MM |
2273 | /* Check whether TP's current replay position is at a breakpoint. */ |
2274 | ||
2275 | static int | |
2276 | record_btrace_replay_at_breakpoint (struct thread_info *tp) | |
2277 | { | |
2278 | struct btrace_insn_iterator *replay; | |
2279 | struct btrace_thread_info *btinfo; | |
2280 | const struct btrace_insn *insn; | |
2281 | struct inferior *inf; | |
2282 | ||
2283 | btinfo = &tp->btrace; | |
2284 | replay = btinfo->replay; | |
2285 | ||
2286 | if (replay == NULL) | |
2287 | return 0; | |
2288 | ||
2289 | insn = btrace_insn_get (replay); | |
2290 | if (insn == NULL) | |
2291 | return 0; | |
2292 | ||
2293 | inf = find_inferior_ptid (tp->ptid); | |
2294 | if (inf == NULL) | |
2295 | return 0; | |
2296 | ||
2297 | return record_check_stopped_by_breakpoint (inf->aspace, insn->pc, | |
2298 | &btinfo->stop_reason); | |
2299 | } | |
2300 | ||
d825d248 | 2301 | /* Step one instruction in forward direction. */ |
52834460 MM |
2302 | |
2303 | static struct target_waitstatus | |
d825d248 | 2304 | record_btrace_single_step_forward (struct thread_info *tp) |
52834460 | 2305 | { |
b61ce85c | 2306 | struct btrace_insn_iterator *replay, end, start; |
52834460 | 2307 | struct btrace_thread_info *btinfo; |
52834460 | 2308 | |
d825d248 MM |
2309 | btinfo = &tp->btrace; |
2310 | replay = btinfo->replay; | |
2311 | ||
2312 | /* We're done if we're not replaying. */ | |
2313 | if (replay == NULL) | |
2314 | return btrace_step_no_history (); | |
2315 | ||
011c71b6 MM |
2316 | /* Check if we're stepping a breakpoint. */ |
2317 | if (record_btrace_replay_at_breakpoint (tp)) | |
2318 | return btrace_step_stopped (); | |
2319 | ||
b61ce85c MM |
2320 | /* Skip gaps during replay. If we end up at a gap (at the end of the trace), |
2321 | jump back to the instruction at which we started. */ | |
2322 | start = *replay; | |
d825d248 MM |
2323 | do |
2324 | { | |
2325 | unsigned int steps; | |
2326 | ||
e3cfc1c7 MM |
2327 | /* We will bail out here if we continue stepping after reaching the end |
2328 | of the execution history. */ | |
d825d248 MM |
2329 | steps = btrace_insn_next (replay, 1); |
2330 | if (steps == 0) | |
b61ce85c MM |
2331 | { |
2332 | *replay = start; | |
2333 | return btrace_step_no_history (); | |
2334 | } | |
d825d248 MM |
2335 | } |
2336 | while (btrace_insn_get (replay) == NULL); | |
2337 | ||
2338 | /* Determine the end of the instruction trace. */ | |
2339 | btrace_insn_end (&end, btinfo); | |
2340 | ||
e3cfc1c7 MM |
2341 | /* The execution trace contains (and ends with) the current instruction. |
2342 | This instruction has not been executed, yet, so the trace really ends | |
2343 | one instruction earlier. */ | |
d825d248 | 2344 | if (btrace_insn_cmp (replay, &end) == 0) |
e3cfc1c7 | 2345 | return btrace_step_no_history (); |
d825d248 MM |
2346 | |
2347 | return btrace_step_spurious (); | |
2348 | } | |
2349 | ||
2350 | /* Step one instruction in backward direction. */ | |
2351 | ||
2352 | static struct target_waitstatus | |
2353 | record_btrace_single_step_backward (struct thread_info *tp) | |
2354 | { | |
b61ce85c | 2355 | struct btrace_insn_iterator *replay, start; |
d825d248 | 2356 | struct btrace_thread_info *btinfo; |
e59fa00f | 2357 | |
52834460 MM |
2358 | btinfo = &tp->btrace; |
2359 | replay = btinfo->replay; | |
2360 | ||
d825d248 MM |
2361 | /* Start replaying if we're not already doing so. */ |
2362 | if (replay == NULL) | |
2363 | replay = record_btrace_start_replaying (tp); | |
2364 | ||
2365 | /* If we can't step any further, we reached the end of the history. | |
b61ce85c MM |
2366 | Skip gaps during replay. If we end up at a gap (at the beginning of |
2367 | the trace), jump back to the instruction at which we started. */ | |
2368 | start = *replay; | |
d825d248 MM |
2369 | do |
2370 | { | |
2371 | unsigned int steps; | |
2372 | ||
2373 | steps = btrace_insn_prev (replay, 1); | |
2374 | if (steps == 0) | |
b61ce85c MM |
2375 | { |
2376 | *replay = start; | |
2377 | return btrace_step_no_history (); | |
2378 | } | |
d825d248 MM |
2379 | } |
2380 | while (btrace_insn_get (replay) == NULL); | |
2381 | ||
011c71b6 MM |
2382 | /* Check if we're stepping a breakpoint. |
2383 | ||
2384 | For reverse-stepping, this check is after the step. There is logic in | |
2385 | infrun.c that handles reverse-stepping separately. See, for example, | |
2386 | proceed and adjust_pc_after_break. | |
2387 | ||
2388 | This code assumes that for reverse-stepping, PC points to the last | |
2389 | de-executed instruction, whereas for forward-stepping PC points to the | |
2390 | next to-be-executed instruction. */ | |
2391 | if (record_btrace_replay_at_breakpoint (tp)) | |
2392 | return btrace_step_stopped (); | |
2393 | ||
d825d248 MM |
2394 | return btrace_step_spurious (); |
2395 | } | |
2396 | ||
2397 | /* Step a single thread. */ | |
2398 | ||
2399 | static struct target_waitstatus | |
2400 | record_btrace_step_thread (struct thread_info *tp) | |
2401 | { | |
2402 | struct btrace_thread_info *btinfo; | |
2403 | struct target_waitstatus status; | |
2404 | enum btrace_thread_flag flags; | |
2405 | ||
2406 | btinfo = &tp->btrace; | |
2407 | ||
6e4879f0 MM |
2408 | flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP); |
2409 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 | 2410 | |
43792cf0 | 2411 | DEBUG ("stepping thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 MM |
2412 | target_pid_to_str (tp->ptid), flags, |
2413 | btrace_thread_flag_to_str (flags)); | |
52834460 | 2414 | |
6e4879f0 MM |
2415 | /* We can't step without an execution history. */ |
2416 | if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp)) | |
2417 | return btrace_step_no_history (); | |
2418 | ||
52834460 MM |
2419 | switch (flags) |
2420 | { | |
2421 | default: | |
2422 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
2423 | ||
6e4879f0 MM |
2424 | case BTHR_STOP: |
2425 | return btrace_step_stopped_on_request (); | |
2426 | ||
52834460 | 2427 | case BTHR_STEP: |
d825d248 MM |
2428 | status = record_btrace_single_step_forward (tp); |
2429 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2430 | break; |
52834460 MM |
2431 | |
2432 | return btrace_step_stopped (); | |
2433 | ||
2434 | case BTHR_RSTEP: | |
d825d248 MM |
2435 | status = record_btrace_single_step_backward (tp); |
2436 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2437 | break; |
52834460 MM |
2438 | |
2439 | return btrace_step_stopped (); | |
2440 | ||
2441 | case BTHR_CONT: | |
e3cfc1c7 MM |
2442 | status = record_btrace_single_step_forward (tp); |
2443 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2444 | break; | |
52834460 | 2445 | |
e3cfc1c7 MM |
2446 | btinfo->flags |= flags; |
2447 | return btrace_step_again (); | |
52834460 MM |
2448 | |
2449 | case BTHR_RCONT: | |
e3cfc1c7 MM |
2450 | status = record_btrace_single_step_backward (tp); |
2451 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2452 | break; | |
52834460 | 2453 | |
e3cfc1c7 MM |
2454 | btinfo->flags |= flags; |
2455 | return btrace_step_again (); | |
2456 | } | |
d825d248 | 2457 | |
e3cfc1c7 MM |
2458 | /* We keep threads moving at the end of their execution history. The to_wait |
2459 | method will stop the thread for whom the event is reported. */ | |
2460 | if (status.kind == TARGET_WAITKIND_NO_HISTORY) | |
2461 | btinfo->flags |= flags; | |
52834460 | 2462 | |
e3cfc1c7 | 2463 | return status; |
b2f4cfde MM |
2464 | } |
2465 | ||
e3cfc1c7 MM |
2466 | /* A vector of threads. */ |
2467 | ||
2468 | typedef struct thread_info * tp_t; | |
2469 | DEF_VEC_P (tp_t); | |
2470 | ||
a6b5be76 MM |
2471 | /* Announce further events if necessary. */ |
2472 | ||
2473 | static void | |
2474 | record_btrace_maybe_mark_async_event (const VEC (tp_t) *moving, | |
2475 | const VEC (tp_t) *no_history) | |
2476 | { | |
2477 | int more_moving, more_no_history; | |
2478 | ||
2479 | more_moving = !VEC_empty (tp_t, moving); | |
2480 | more_no_history = !VEC_empty (tp_t, no_history); | |
2481 | ||
2482 | if (!more_moving && !more_no_history) | |
2483 | return; | |
2484 | ||
2485 | if (more_moving) | |
2486 | DEBUG ("movers pending"); | |
2487 | ||
2488 | if (more_no_history) | |
2489 | DEBUG ("no-history pending"); | |
2490 | ||
2491 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
2492 | } | |
2493 | ||
b2f4cfde MM |
2494 | /* The to_wait method of target record-btrace. */ |
2495 | ||
2496 | static ptid_t | |
2497 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2498 | struct target_waitstatus *status, int options) | |
2499 | { | |
e3cfc1c7 MM |
2500 | VEC (tp_t) *moving, *no_history; |
2501 | struct thread_info *tp, *eventing; | |
2502 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
52834460 MM |
2503 | |
2504 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2505 | ||
b2f4cfde | 2506 | /* As long as we're not replaying, just forward the request. */ |
a52eab48 MM |
2507 | if ((execution_direction != EXEC_REVERSE) |
2508 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2509 | { |
e75fdfca TT |
2510 | ops = ops->beneath; |
2511 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2512 | } |
2513 | ||
e3cfc1c7 MM |
2514 | moving = NULL; |
2515 | no_history = NULL; | |
2516 | ||
2517 | make_cleanup (VEC_cleanup (tp_t), &moving); | |
2518 | make_cleanup (VEC_cleanup (tp_t), &no_history); | |
2519 | ||
2520 | /* Keep a work list of moving threads. */ | |
2521 | ALL_NON_EXITED_THREADS (tp) | |
2522 | if (ptid_match (tp->ptid, ptid) | |
2523 | && ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)) | |
2524 | VEC_safe_push (tp_t, moving, tp); | |
2525 | ||
2526 | if (VEC_empty (tp_t, moving)) | |
52834460 | 2527 | { |
e3cfc1c7 | 2528 | *status = btrace_step_no_resumed (); |
52834460 | 2529 | |
e3cfc1c7 MM |
2530 | DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid), |
2531 | target_waitstatus_to_string (status)); | |
2532 | ||
2533 | do_cleanups (cleanups); | |
2534 | return null_ptid; | |
52834460 MM |
2535 | } |
2536 | ||
e3cfc1c7 MM |
2537 | /* Step moving threads one by one, one step each, until either one thread |
2538 | reports an event or we run out of threads to step. | |
2539 | ||
2540 | When stepping more than one thread, chances are that some threads reach | |
2541 | the end of their execution history earlier than others. If we reported | |
2542 | this immediately, all-stop on top of non-stop would stop all threads and | |
2543 | resume the same threads next time. And we would report the same thread | |
2544 | having reached the end of its execution history again. | |
2545 | ||
2546 | In the worst case, this would starve the other threads. But even if other | |
2547 | threads would be allowed to make progress, this would result in far too | |
2548 | many intermediate stops. | |
2549 | ||
2550 | We therefore delay the reporting of "no execution history" until we have | |
2551 | nothing else to report. By this time, all threads should have moved to | |
2552 | either the beginning or the end of their execution history. There will | |
2553 | be a single user-visible stop. */ | |
2554 | eventing = NULL; | |
2555 | while ((eventing == NULL) && !VEC_empty (tp_t, moving)) | |
2556 | { | |
2557 | unsigned int ix; | |
2558 | ||
2559 | ix = 0; | |
2560 | while ((eventing == NULL) && VEC_iterate (tp_t, moving, ix, tp)) | |
2561 | { | |
2562 | *status = record_btrace_step_thread (tp); | |
2563 | ||
2564 | switch (status->kind) | |
2565 | { | |
2566 | case TARGET_WAITKIND_IGNORE: | |
2567 | ix++; | |
2568 | break; | |
2569 | ||
2570 | case TARGET_WAITKIND_NO_HISTORY: | |
2571 | VEC_safe_push (tp_t, no_history, | |
2572 | VEC_ordered_remove (tp_t, moving, ix)); | |
2573 | break; | |
2574 | ||
2575 | default: | |
2576 | eventing = VEC_unordered_remove (tp_t, moving, ix); | |
2577 | break; | |
2578 | } | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | if (eventing == NULL) | |
2583 | { | |
2584 | /* We started with at least one moving thread. This thread must have | |
2585 | either stopped or reached the end of its execution history. | |
2586 | ||
2587 | In the former case, EVENTING must not be NULL. | |
2588 | In the latter case, NO_HISTORY must not be empty. */ | |
2589 | gdb_assert (!VEC_empty (tp_t, no_history)); | |
2590 | ||
2591 | /* We kept threads moving at the end of their execution history. Stop | |
2592 | EVENTING now that we are going to report its stop. */ | |
2593 | eventing = VEC_unordered_remove (tp_t, no_history, 0); | |
2594 | eventing->btrace.flags &= ~BTHR_MOVE; | |
2595 | ||
2596 | *status = btrace_step_no_history (); | |
2597 | } | |
2598 | ||
2599 | gdb_assert (eventing != NULL); | |
2600 | ||
2601 | /* We kept threads replaying at the end of their execution history. Stop | |
2602 | replaying EVENTING now that we are going to report its stop. */ | |
2603 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2604 | |
2605 | /* Stop all other threads. */ | |
5953356c | 2606 | if (!target_is_non_stop_p ()) |
e3cfc1c7 MM |
2607 | ALL_NON_EXITED_THREADS (tp) |
2608 | record_btrace_cancel_resume (tp); | |
52834460 | 2609 | |
a6b5be76 MM |
2610 | /* In async mode, we need to announce further events. */ |
2611 | if (target_is_async_p ()) | |
2612 | record_btrace_maybe_mark_async_event (moving, no_history); | |
2613 | ||
52834460 | 2614 | /* Start record histories anew from the current position. */ |
e3cfc1c7 | 2615 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2616 | |
2617 | /* We moved the replay position but did not update registers. */ | |
e3cfc1c7 MM |
2618 | registers_changed_ptid (eventing->ptid); |
2619 | ||
43792cf0 PA |
2620 | DEBUG ("wait ended by thread %s (%s): %s", |
2621 | print_thread_id (eventing), | |
e3cfc1c7 MM |
2622 | target_pid_to_str (eventing->ptid), |
2623 | target_waitstatus_to_string (status)); | |
52834460 | 2624 | |
e3cfc1c7 MM |
2625 | do_cleanups (cleanups); |
2626 | return eventing->ptid; | |
52834460 MM |
2627 | } |
2628 | ||
6e4879f0 MM |
2629 | /* The to_stop method of target record-btrace. */ |
2630 | ||
2631 | static void | |
2632 | record_btrace_stop (struct target_ops *ops, ptid_t ptid) | |
2633 | { | |
2634 | DEBUG ("stop %s", target_pid_to_str (ptid)); | |
2635 | ||
2636 | /* As long as we're not replaying, just forward the request. */ | |
a52eab48 MM |
2637 | if ((execution_direction != EXEC_REVERSE) |
2638 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
6e4879f0 MM |
2639 | { |
2640 | ops = ops->beneath; | |
2641 | ops->to_stop (ops, ptid); | |
2642 | } | |
2643 | else | |
2644 | { | |
2645 | struct thread_info *tp; | |
2646 | ||
2647 | ALL_NON_EXITED_THREADS (tp) | |
2648 | if (ptid_match (tp->ptid, ptid)) | |
2649 | { | |
2650 | tp->btrace.flags &= ~BTHR_MOVE; | |
2651 | tp->btrace.flags |= BTHR_STOP; | |
2652 | } | |
2653 | } | |
2654 | } | |
2655 | ||
52834460 MM |
2656 | /* The to_can_execute_reverse method of target record-btrace. */ |
2657 | ||
2658 | static int | |
19db3e69 | 2659 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2660 | { |
2661 | return 1; | |
2662 | } | |
2663 | ||
9e8915c6 | 2664 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2665 | |
9e8915c6 PA |
2666 | static int |
2667 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2668 | { |
a52eab48 | 2669 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2670 | { |
2671 | struct thread_info *tp = inferior_thread (); | |
2672 | ||
2673 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2674 | } | |
2675 | ||
2676 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2677 | } | |
2678 | ||
2679 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2680 | record-btrace. */ | |
2681 | ||
2682 | static int | |
2683 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2684 | { | |
a52eab48 | 2685 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2686 | return 1; |
2687 | ||
2688 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2689 | } | |
2690 | ||
2691 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2692 | ||
2693 | static int | |
2694 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2695 | { | |
a52eab48 | 2696 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2697 | { |
2698 | struct thread_info *tp = inferior_thread (); | |
2699 | ||
2700 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2701 | } | |
2702 | ||
2703 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2704 | } | |
2705 | ||
2706 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2707 | record-btrace. */ | |
2708 | ||
2709 | static int | |
2710 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2711 | { | |
a52eab48 | 2712 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 | 2713 | return 1; |
52834460 | 2714 | |
9e8915c6 | 2715 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2716 | } |
2717 | ||
e8032dde | 2718 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2719 | |
2720 | static void | |
e8032dde | 2721 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2722 | { |
e8032dde | 2723 | /* We don't add or remove threads during replay. */ |
a52eab48 | 2724 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2725 | return; |
2726 | ||
2727 | /* Forward the request. */ | |
e75fdfca | 2728 | ops = ops->beneath; |
e8032dde | 2729 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2730 | } |
2731 | ||
2732 | /* The to_thread_alive method of target record-btrace. */ | |
2733 | ||
2734 | static int | |
2735 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2736 | { | |
2737 | /* We don't add or remove threads during replay. */ | |
a52eab48 | 2738 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2739 | return find_thread_ptid (ptid) != NULL; |
2740 | ||
2741 | /* Forward the request. */ | |
e75fdfca TT |
2742 | ops = ops->beneath; |
2743 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2744 | } |
2745 | ||
066ce621 MM |
2746 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2747 | is stopped. */ | |
2748 | ||
2749 | static void | |
2750 | record_btrace_set_replay (struct thread_info *tp, | |
2751 | const struct btrace_insn_iterator *it) | |
2752 | { | |
2753 | struct btrace_thread_info *btinfo; | |
2754 | ||
2755 | btinfo = &tp->btrace; | |
2756 | ||
2757 | if (it == NULL || it->function == NULL) | |
52834460 | 2758 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2759 | else |
2760 | { | |
2761 | if (btinfo->replay == NULL) | |
52834460 | 2762 | record_btrace_start_replaying (tp); |
066ce621 MM |
2763 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2764 | return; | |
2765 | ||
2766 | *btinfo->replay = *it; | |
52834460 | 2767 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2768 | } |
2769 | ||
52834460 MM |
2770 | /* Start anew from the new replay position. */ |
2771 | record_btrace_clear_histories (btinfo); | |
485668e5 MM |
2772 | |
2773 | stop_pc = regcache_read_pc (get_current_regcache ()); | |
2774 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
066ce621 MM |
2775 | } |
2776 | ||
2777 | /* The to_goto_record_begin method of target record-btrace. */ | |
2778 | ||
2779 | static void | |
08475817 | 2780 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2781 | { |
2782 | struct thread_info *tp; | |
2783 | struct btrace_insn_iterator begin; | |
2784 | ||
2785 | tp = require_btrace_thread (); | |
2786 | ||
2787 | btrace_insn_begin (&begin, &tp->btrace); | |
b61ce85c MM |
2788 | |
2789 | /* Skip gaps at the beginning of the trace. */ | |
2790 | while (btrace_insn_get (&begin) == NULL) | |
2791 | { | |
2792 | unsigned int steps; | |
2793 | ||
2794 | steps = btrace_insn_next (&begin, 1); | |
2795 | if (steps == 0) | |
2796 | error (_("No trace.")); | |
2797 | } | |
2798 | ||
066ce621 | 2799 | record_btrace_set_replay (tp, &begin); |
066ce621 MM |
2800 | } |
2801 | ||
2802 | /* The to_goto_record_end method of target record-btrace. */ | |
2803 | ||
2804 | static void | |
307a1b91 | 2805 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2806 | { |
2807 | struct thread_info *tp; | |
2808 | ||
2809 | tp = require_btrace_thread (); | |
2810 | ||
2811 | record_btrace_set_replay (tp, NULL); | |
066ce621 MM |
2812 | } |
2813 | ||
2814 | /* The to_goto_record method of target record-btrace. */ | |
2815 | ||
2816 | static void | |
606183ac | 2817 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2818 | { |
2819 | struct thread_info *tp; | |
2820 | struct btrace_insn_iterator it; | |
2821 | unsigned int number; | |
2822 | int found; | |
2823 | ||
2824 | number = insn; | |
2825 | ||
2826 | /* Check for wrap-arounds. */ | |
2827 | if (number != insn) | |
2828 | error (_("Instruction number out of range.")); | |
2829 | ||
2830 | tp = require_btrace_thread (); | |
2831 | ||
2832 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2833 | if (found == 0) | |
2834 | error (_("No such instruction.")); | |
2835 | ||
2836 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2837 | } |
2838 | ||
797094dd MM |
2839 | /* The to_record_stop_replaying method of target record-btrace. */ |
2840 | ||
2841 | static void | |
2842 | record_btrace_stop_replaying_all (struct target_ops *self) | |
2843 | { | |
2844 | struct thread_info *tp; | |
2845 | ||
2846 | ALL_NON_EXITED_THREADS (tp) | |
2847 | record_btrace_stop_replaying (tp); | |
2848 | } | |
2849 | ||
70ad5bff MM |
2850 | /* The to_execution_direction target method. */ |
2851 | ||
2852 | static enum exec_direction_kind | |
2853 | record_btrace_execution_direction (struct target_ops *self) | |
2854 | { | |
2855 | return record_btrace_resume_exec_dir; | |
2856 | } | |
2857 | ||
aef92902 MM |
2858 | /* The to_prepare_to_generate_core target method. */ |
2859 | ||
2860 | static void | |
2861 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2862 | { | |
2863 | record_btrace_generating_corefile = 1; | |
2864 | } | |
2865 | ||
2866 | /* The to_done_generating_core target method. */ | |
2867 | ||
2868 | static void | |
2869 | record_btrace_done_generating_core (struct target_ops *self) | |
2870 | { | |
2871 | record_btrace_generating_corefile = 0; | |
2872 | } | |
2873 | ||
afedecd3 MM |
2874 | /* Initialize the record-btrace target ops. */ |
2875 | ||
2876 | static void | |
2877 | init_record_btrace_ops (void) | |
2878 | { | |
2879 | struct target_ops *ops; | |
2880 | ||
2881 | ops = &record_btrace_ops; | |
2882 | ops->to_shortname = "record-btrace"; | |
2883 | ops->to_longname = "Branch tracing target"; | |
2884 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2885 | ops->to_open = record_btrace_open; | |
2886 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2887 | ops->to_async = record_btrace_async; |
afedecd3 | 2888 | ops->to_detach = record_detach; |
c0272db5 | 2889 | ops->to_disconnect = record_btrace_disconnect; |
afedecd3 MM |
2890 | ops->to_mourn_inferior = record_mourn_inferior; |
2891 | ops->to_kill = record_kill; | |
afedecd3 MM |
2892 | ops->to_stop_recording = record_btrace_stop_recording; |
2893 | ops->to_info_record = record_btrace_info; | |
2894 | ops->to_insn_history = record_btrace_insn_history; | |
2895 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2896 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2897 | ops->to_call_history = record_btrace_call_history; | |
2898 | ops->to_call_history_from = record_btrace_call_history_from; | |
2899 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2900 | ops->to_record_is_replaying = record_btrace_is_replaying; |
7ff27e9b | 2901 | ops->to_record_will_replay = record_btrace_will_replay; |
797094dd | 2902 | ops->to_record_stop_replaying = record_btrace_stop_replaying_all; |
633785ff MM |
2903 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2904 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2905 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2906 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2907 | ops->to_store_registers = record_btrace_store_registers; | |
2908 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2909 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2910 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde | 2911 | ops->to_resume = record_btrace_resume; |
85ad3aaf | 2912 | ops->to_commit_resume = record_btrace_commit_resume; |
b2f4cfde | 2913 | ops->to_wait = record_btrace_wait; |
6e4879f0 | 2914 | ops->to_stop = record_btrace_stop; |
e8032dde | 2915 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2916 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2917 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2918 | ops->to_goto_record_end = record_btrace_goto_end; | |
2919 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2920 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2921 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2922 | ops->to_supports_stopped_by_sw_breakpoint | |
2923 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2924 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2925 | ops->to_supports_stopped_by_hw_breakpoint | |
2926 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2927 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2928 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2929 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2930 | ops->to_stratum = record_stratum; |
2931 | ops->to_magic = OPS_MAGIC; | |
2932 | } | |
2933 | ||
f4abbc16 MM |
2934 | /* Start recording in BTS format. */ |
2935 | ||
2936 | static void | |
2937 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2938 | { | |
f4abbc16 MM |
2939 | if (args != NULL && *args != 0) |
2940 | error (_("Invalid argument.")); | |
2941 | ||
2942 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2943 | ||
492d29ea PA |
2944 | TRY |
2945 | { | |
2946 | execute_command ("target record-btrace", from_tty); | |
2947 | } | |
2948 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2949 | { |
2950 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2951 | throw_exception (exception); | |
2952 | } | |
492d29ea | 2953 | END_CATCH |
f4abbc16 MM |
2954 | } |
2955 | ||
bc504a31 | 2956 | /* Start recording in Intel Processor Trace format. */ |
afedecd3 MM |
2957 | |
2958 | static void | |
b20a6524 | 2959 | cmd_record_btrace_pt_start (char *args, int from_tty) |
afedecd3 MM |
2960 | { |
2961 | if (args != NULL && *args != 0) | |
2962 | error (_("Invalid argument.")); | |
2963 | ||
b20a6524 | 2964 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2965 | |
492d29ea PA |
2966 | TRY |
2967 | { | |
2968 | execute_command ("target record-btrace", from_tty); | |
2969 | } | |
2970 | CATCH (exception, RETURN_MASK_ALL) | |
2971 | { | |
2972 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2973 | throw_exception (exception); | |
2974 | } | |
2975 | END_CATCH | |
afedecd3 MM |
2976 | } |
2977 | ||
b20a6524 MM |
2978 | /* Alias for "target record". */ |
2979 | ||
2980 | static void | |
2981 | cmd_record_btrace_start (char *args, int from_tty) | |
2982 | { | |
2983 | if (args != NULL && *args != 0) | |
2984 | error (_("Invalid argument.")); | |
2985 | ||
2986 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2987 | ||
2988 | TRY | |
2989 | { | |
2990 | execute_command ("target record-btrace", from_tty); | |
2991 | } | |
2992 | CATCH (exception, RETURN_MASK_ALL) | |
2993 | { | |
2994 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2995 | ||
2996 | TRY | |
2997 | { | |
2998 | execute_command ("target record-btrace", from_tty); | |
2999 | } | |
3000 | CATCH (exception, RETURN_MASK_ALL) | |
3001 | { | |
3002 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
3003 | throw_exception (exception); | |
3004 | } | |
3005 | END_CATCH | |
3006 | } | |
3007 | END_CATCH | |
3008 | } | |
3009 | ||
67b5c0c1 MM |
3010 | /* The "set record btrace" command. */ |
3011 | ||
3012 | static void | |
3013 | cmd_set_record_btrace (char *args, int from_tty) | |
3014 | { | |
3015 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
3016 | } | |
3017 | ||
3018 | /* The "show record btrace" command. */ | |
3019 | ||
3020 | static void | |
3021 | cmd_show_record_btrace (char *args, int from_tty) | |
3022 | { | |
3023 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
3024 | } | |
3025 | ||
3026 | /* The "show record btrace replay-memory-access" command. */ | |
3027 | ||
3028 | static void | |
3029 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
3030 | struct cmd_list_element *c, const char *value) | |
3031 | { | |
3032 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
3033 | replay_memory_access); | |
3034 | } | |
3035 | ||
d33501a5 MM |
3036 | /* The "set record btrace bts" command. */ |
3037 | ||
3038 | static void | |
3039 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
3040 | { | |
3041 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
b20a6524 | 3042 | "by an appropriate subcommand.\n")); |
d33501a5 MM |
3043 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", |
3044 | all_commands, gdb_stdout); | |
3045 | } | |
3046 | ||
3047 | /* The "show record btrace bts" command. */ | |
3048 | ||
3049 | static void | |
3050 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
3051 | { | |
3052 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
3053 | } | |
3054 | ||
b20a6524 MM |
3055 | /* The "set record btrace pt" command. */ |
3056 | ||
3057 | static void | |
3058 | cmd_set_record_btrace_pt (char *args, int from_tty) | |
3059 | { | |
3060 | printf_unfiltered (_("\"set record btrace pt\" must be followed " | |
3061 | "by an appropriate subcommand.\n")); | |
3062 | help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ", | |
3063 | all_commands, gdb_stdout); | |
3064 | } | |
3065 | ||
3066 | /* The "show record btrace pt" command. */ | |
3067 | ||
3068 | static void | |
3069 | cmd_show_record_btrace_pt (char *args, int from_tty) | |
3070 | { | |
3071 | cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, ""); | |
3072 | } | |
3073 | ||
3074 | /* The "record bts buffer-size" show value function. */ | |
3075 | ||
3076 | static void | |
3077 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
3078 | struct cmd_list_element *c, | |
3079 | const char *value) | |
3080 | { | |
3081 | fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"), | |
3082 | value); | |
3083 | } | |
3084 | ||
3085 | /* The "record pt buffer-size" show value function. */ | |
3086 | ||
3087 | static void | |
3088 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
3089 | struct cmd_list_element *c, | |
3090 | const char *value) | |
3091 | { | |
3092 | fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"), | |
3093 | value); | |
3094 | } | |
3095 | ||
afedecd3 MM |
3096 | void _initialize_record_btrace (void); |
3097 | ||
3098 | /* Initialize btrace commands. */ | |
3099 | ||
3100 | void | |
3101 | _initialize_record_btrace (void) | |
3102 | { | |
f4abbc16 MM |
3103 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
3104 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
3105 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
3106 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
3107 | ||
f4abbc16 MM |
3108 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
3109 | _("\ | |
3110 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
3111 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
3112 | This format may not be available on all processors."), | |
3113 | &record_btrace_cmdlist); | |
3114 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
3115 | ||
b20a6524 MM |
3116 | add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, |
3117 | _("\ | |
bc504a31 | 3118 | Start branch trace recording in Intel Processor Trace format.\n\n\ |
b20a6524 MM |
3119 | This format may not be available on all processors."), |
3120 | &record_btrace_cmdlist); | |
3121 | add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist); | |
3122 | ||
67b5c0c1 MM |
3123 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
3124 | _("Set record options"), &set_record_btrace_cmdlist, | |
3125 | "set record btrace ", 0, &set_record_cmdlist); | |
3126 | ||
3127 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
3128 | _("Show record options"), &show_record_btrace_cmdlist, | |
3129 | "show record btrace ", 0, &show_record_cmdlist); | |
3130 | ||
3131 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
3132 | replay_memory_access_types, &replay_memory_access, _("\ | |
3133 | Set what memory accesses are allowed during replay."), _("\ | |
3134 | Show what memory accesses are allowed during replay."), | |
3135 | _("Default is READ-ONLY.\n\n\ | |
3136 | The btrace record target does not trace data.\n\ | |
3137 | The memory therefore corresponds to the live target and not \ | |
3138 | to the current replay position.\n\n\ | |
3139 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
3140 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
3141 | replay."), | |
3142 | NULL, cmd_show_replay_memory_access, | |
3143 | &set_record_btrace_cmdlist, | |
3144 | &show_record_btrace_cmdlist); | |
3145 | ||
d33501a5 MM |
3146 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
3147 | _("Set record btrace bts options"), | |
3148 | &set_record_btrace_bts_cmdlist, | |
3149 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
3150 | ||
3151 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
3152 | _("Show record btrace bts options"), | |
3153 | &show_record_btrace_bts_cmdlist, | |
3154 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
3155 | ||
3156 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3157 | &record_btrace_conf.bts.size, | |
3158 | _("Set the record/replay bts buffer size."), | |
3159 | _("Show the record/replay bts buffer size."), _("\ | |
3160 | When starting recording request a trace buffer of this size. \ | |
3161 | The actual buffer size may differ from the requested size. \ | |
3162 | Use \"info record\" to see the actual buffer size.\n\n\ | |
3163 | Bigger buffers allow longer recording but also take more time to process \ | |
3164 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
3165 | The trace buffer size may not be changed while recording."), NULL, |
3166 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
3167 | &set_record_btrace_bts_cmdlist, |
3168 | &show_record_btrace_bts_cmdlist); | |
3169 | ||
b20a6524 MM |
3170 | add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt, |
3171 | _("Set record btrace pt options"), | |
3172 | &set_record_btrace_pt_cmdlist, | |
3173 | "set record btrace pt ", 0, &set_record_btrace_cmdlist); | |
3174 | ||
3175 | add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt, | |
3176 | _("Show record btrace pt options"), | |
3177 | &show_record_btrace_pt_cmdlist, | |
3178 | "show record btrace pt ", 0, &show_record_btrace_cmdlist); | |
3179 | ||
3180 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3181 | &record_btrace_conf.pt.size, | |
3182 | _("Set the record/replay pt buffer size."), | |
3183 | _("Show the record/replay pt buffer size."), _("\ | |
3184 | Bigger buffers allow longer recording but also take more time to process \ | |
3185 | the recorded execution.\n\ | |
3186 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
3187 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
3188 | &set_record_btrace_pt_cmdlist, | |
3189 | &show_record_btrace_pt_cmdlist); | |
3190 | ||
afedecd3 MM |
3191 | init_record_btrace_ops (); |
3192 | add_target (&record_btrace_ops); | |
0b722aec MM |
3193 | |
3194 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
3195 | xcalloc, xfree); | |
d33501a5 MM |
3196 | |
3197 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 3198 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 3199 | } |