Commit | Line | Data |
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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
618f726f | 3 | Copyright (C) 2013-2016 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" |
afedecd3 MM |
42 | |
43 | /* The target_ops of record-btrace. */ | |
44 | static struct target_ops record_btrace_ops; | |
45 | ||
46 | /* A new thread observer enabling branch tracing for the new thread. */ | |
47 | static struct observer *record_btrace_thread_observer; | |
48 | ||
67b5c0c1 MM |
49 | /* Memory access types used in set/show record btrace replay-memory-access. */ |
50 | static const char replay_memory_access_read_only[] = "read-only"; | |
51 | static const char replay_memory_access_read_write[] = "read-write"; | |
52 | static const char *const replay_memory_access_types[] = | |
53 | { | |
54 | replay_memory_access_read_only, | |
55 | replay_memory_access_read_write, | |
56 | NULL | |
57 | }; | |
58 | ||
59 | /* The currently allowed replay memory access type. */ | |
60 | static const char *replay_memory_access = replay_memory_access_read_only; | |
61 | ||
62 | /* Command lists for "set/show record btrace". */ | |
63 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
64 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
633785ff | 65 | |
70ad5bff MM |
66 | /* The execution direction of the last resume we got. See record-full.c. */ |
67 | static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD; | |
68 | ||
69 | /* The async event handler for reverse/replay execution. */ | |
70 | static struct async_event_handler *record_btrace_async_inferior_event_handler; | |
71 | ||
aef92902 MM |
72 | /* A flag indicating that we are currently generating a core file. */ |
73 | static int record_btrace_generating_corefile; | |
74 | ||
f4abbc16 MM |
75 | /* The current branch trace configuration. */ |
76 | static struct btrace_config record_btrace_conf; | |
77 | ||
78 | /* Command list for "record btrace". */ | |
79 | static struct cmd_list_element *record_btrace_cmdlist; | |
80 | ||
d33501a5 MM |
81 | /* Command lists for "set/show record btrace bts". */ |
82 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
83 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
84 | ||
b20a6524 MM |
85 | /* Command lists for "set/show record btrace pt". */ |
86 | static struct cmd_list_element *set_record_btrace_pt_cmdlist; | |
87 | static struct cmd_list_element *show_record_btrace_pt_cmdlist; | |
88 | ||
afedecd3 MM |
89 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
90 | ambiguities when used in if statements. */ | |
91 | ||
92 | #define DEBUG(msg, args...) \ | |
93 | do \ | |
94 | { \ | |
95 | if (record_debug != 0) \ | |
96 | fprintf_unfiltered (gdb_stdlog, \ | |
97 | "[record-btrace] " msg "\n", ##args); \ | |
98 | } \ | |
99 | while (0) | |
100 | ||
101 | ||
102 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 103 | thread_info. |
afedecd3 MM |
104 | |
105 | Throws an error if there is no thread or no trace. This function never | |
106 | returns NULL. */ | |
107 | ||
066ce621 MM |
108 | static struct thread_info * |
109 | require_btrace_thread (void) | |
afedecd3 MM |
110 | { |
111 | struct thread_info *tp; | |
afedecd3 MM |
112 | |
113 | DEBUG ("require"); | |
114 | ||
115 | tp = find_thread_ptid (inferior_ptid); | |
116 | if (tp == NULL) | |
117 | error (_("No thread.")); | |
118 | ||
119 | btrace_fetch (tp); | |
120 | ||
6e07b1d2 | 121 | if (btrace_is_empty (tp)) |
afedecd3 MM |
122 | error (_("No trace.")); |
123 | ||
066ce621 MM |
124 | return tp; |
125 | } | |
126 | ||
127 | /* Update the branch trace for the current thread and return a pointer to its | |
128 | branch trace information struct. | |
129 | ||
130 | Throws an error if there is no thread or no trace. This function never | |
131 | returns NULL. */ | |
132 | ||
133 | static struct btrace_thread_info * | |
134 | require_btrace (void) | |
135 | { | |
136 | struct thread_info *tp; | |
137 | ||
138 | tp = require_btrace_thread (); | |
139 | ||
140 | return &tp->btrace; | |
afedecd3 MM |
141 | } |
142 | ||
143 | /* Enable branch tracing for one thread. Warn on errors. */ | |
144 | ||
145 | static void | |
146 | record_btrace_enable_warn (struct thread_info *tp) | |
147 | { | |
492d29ea PA |
148 | TRY |
149 | { | |
150 | btrace_enable (tp, &record_btrace_conf); | |
151 | } | |
152 | CATCH (error, RETURN_MASK_ERROR) | |
153 | { | |
154 | warning ("%s", error.message); | |
155 | } | |
156 | END_CATCH | |
afedecd3 MM |
157 | } |
158 | ||
159 | /* Callback function to disable branch tracing for one thread. */ | |
160 | ||
161 | static void | |
162 | record_btrace_disable_callback (void *arg) | |
163 | { | |
19ba03f4 | 164 | struct thread_info *tp = (struct thread_info *) arg; |
afedecd3 MM |
165 | |
166 | btrace_disable (tp); | |
167 | } | |
168 | ||
169 | /* Enable automatic tracing of new threads. */ | |
170 | ||
171 | static void | |
172 | record_btrace_auto_enable (void) | |
173 | { | |
174 | DEBUG ("attach thread observer"); | |
175 | ||
176 | record_btrace_thread_observer | |
177 | = observer_attach_new_thread (record_btrace_enable_warn); | |
178 | } | |
179 | ||
180 | /* Disable automatic tracing of new threads. */ | |
181 | ||
182 | static void | |
183 | record_btrace_auto_disable (void) | |
184 | { | |
185 | /* The observer may have been detached, already. */ | |
186 | if (record_btrace_thread_observer == NULL) | |
187 | return; | |
188 | ||
189 | DEBUG ("detach thread observer"); | |
190 | ||
191 | observer_detach_new_thread (record_btrace_thread_observer); | |
192 | record_btrace_thread_observer = NULL; | |
193 | } | |
194 | ||
70ad5bff MM |
195 | /* The record-btrace async event handler function. */ |
196 | ||
197 | static void | |
198 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
199 | { | |
200 | inferior_event_handler (INF_REG_EVENT, NULL); | |
201 | } | |
202 | ||
c0272db5 TW |
203 | /* See record-btrace.h. */ |
204 | ||
205 | void | |
206 | record_btrace_push_target (void) | |
207 | { | |
208 | const char *format; | |
209 | ||
210 | record_btrace_auto_enable (); | |
211 | ||
212 | push_target (&record_btrace_ops); | |
213 | ||
214 | record_btrace_async_inferior_event_handler | |
215 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
216 | NULL); | |
217 | record_btrace_generating_corefile = 0; | |
218 | ||
219 | format = btrace_format_short_string (record_btrace_conf.format); | |
220 | observer_notify_record_changed (current_inferior (), 1, "btrace", format); | |
221 | } | |
222 | ||
afedecd3 MM |
223 | /* The to_open method of target record-btrace. */ |
224 | ||
225 | static void | |
014f9477 | 226 | record_btrace_open (const char *args, int from_tty) |
afedecd3 MM |
227 | { |
228 | struct cleanup *disable_chain; | |
229 | struct thread_info *tp; | |
230 | ||
231 | DEBUG ("open"); | |
232 | ||
8213266a | 233 | record_preopen (); |
afedecd3 MM |
234 | |
235 | if (!target_has_execution) | |
236 | error (_("The program is not being run.")); | |
237 | ||
afedecd3 MM |
238 | gdb_assert (record_btrace_thread_observer == NULL); |
239 | ||
240 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 241 | ALL_NON_EXITED_THREADS (tp) |
5d5658a1 | 242 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num)) |
afedecd3 | 243 | { |
f4abbc16 | 244 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
245 | |
246 | make_cleanup (record_btrace_disable_callback, tp); | |
247 | } | |
248 | ||
c0272db5 | 249 | record_btrace_push_target (); |
afedecd3 MM |
250 | |
251 | discard_cleanups (disable_chain); | |
252 | } | |
253 | ||
254 | /* The to_stop_recording method of target record-btrace. */ | |
255 | ||
256 | static void | |
c6cd7c02 | 257 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
258 | { |
259 | struct thread_info *tp; | |
260 | ||
261 | DEBUG ("stop recording"); | |
262 | ||
263 | record_btrace_auto_disable (); | |
264 | ||
034f788c | 265 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
266 | if (tp->btrace.target != NULL) |
267 | btrace_disable (tp); | |
268 | } | |
269 | ||
c0272db5 TW |
270 | /* The to_disconnect method of target record-btrace. */ |
271 | ||
272 | static void | |
273 | record_btrace_disconnect (struct target_ops *self, const char *args, | |
274 | int from_tty) | |
275 | { | |
276 | struct target_ops *beneath = self->beneath; | |
277 | ||
278 | /* Do not stop recording, just clean up GDB side. */ | |
279 | unpush_target (self); | |
280 | ||
281 | /* Forward disconnect. */ | |
282 | beneath->to_disconnect (beneath, args, from_tty); | |
283 | } | |
284 | ||
afedecd3 MM |
285 | /* The to_close method of target record-btrace. */ |
286 | ||
287 | static void | |
de90e03d | 288 | record_btrace_close (struct target_ops *self) |
afedecd3 | 289 | { |
568e808b MM |
290 | struct thread_info *tp; |
291 | ||
70ad5bff MM |
292 | if (record_btrace_async_inferior_event_handler != NULL) |
293 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
294 | ||
99c819ee MM |
295 | /* Make sure automatic recording gets disabled even if we did not stop |
296 | recording before closing the record-btrace target. */ | |
297 | record_btrace_auto_disable (); | |
298 | ||
568e808b MM |
299 | /* We should have already stopped recording. |
300 | Tear down btrace in case we have not. */ | |
034f788c | 301 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 302 | btrace_teardown (tp); |
afedecd3 MM |
303 | } |
304 | ||
b7d2e916 PA |
305 | /* The to_async method of target record-btrace. */ |
306 | ||
307 | static void | |
6a3753b3 | 308 | record_btrace_async (struct target_ops *ops, int enable) |
b7d2e916 | 309 | { |
6a3753b3 | 310 | if (enable) |
b7d2e916 PA |
311 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
312 | else | |
313 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
314 | ||
6a3753b3 | 315 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
316 | } |
317 | ||
d33501a5 MM |
318 | /* Adjusts the size and returns a human readable size suffix. */ |
319 | ||
320 | static const char * | |
321 | record_btrace_adjust_size (unsigned int *size) | |
322 | { | |
323 | unsigned int sz; | |
324 | ||
325 | sz = *size; | |
326 | ||
327 | if ((sz & ((1u << 30) - 1)) == 0) | |
328 | { | |
329 | *size = sz >> 30; | |
330 | return "GB"; | |
331 | } | |
332 | else if ((sz & ((1u << 20) - 1)) == 0) | |
333 | { | |
334 | *size = sz >> 20; | |
335 | return "MB"; | |
336 | } | |
337 | else if ((sz & ((1u << 10) - 1)) == 0) | |
338 | { | |
339 | *size = sz >> 10; | |
340 | return "kB"; | |
341 | } | |
342 | else | |
343 | return ""; | |
344 | } | |
345 | ||
346 | /* Print a BTS configuration. */ | |
347 | ||
348 | static void | |
349 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
350 | { | |
351 | const char *suffix; | |
352 | unsigned int size; | |
353 | ||
354 | size = conf->size; | |
355 | if (size > 0) | |
356 | { | |
357 | suffix = record_btrace_adjust_size (&size); | |
358 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
359 | } | |
360 | } | |
361 | ||
bc504a31 | 362 | /* Print an Intel Processor Trace configuration. */ |
b20a6524 MM |
363 | |
364 | static void | |
365 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
366 | { | |
367 | const char *suffix; | |
368 | unsigned int size; | |
369 | ||
370 | size = conf->size; | |
371 | if (size > 0) | |
372 | { | |
373 | suffix = record_btrace_adjust_size (&size); | |
374 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
375 | } | |
376 | } | |
377 | ||
d33501a5 MM |
378 | /* Print a branch tracing configuration. */ |
379 | ||
380 | static void | |
381 | record_btrace_print_conf (const struct btrace_config *conf) | |
382 | { | |
383 | printf_unfiltered (_("Recording format: %s.\n"), | |
384 | btrace_format_string (conf->format)); | |
385 | ||
386 | switch (conf->format) | |
387 | { | |
388 | case BTRACE_FORMAT_NONE: | |
389 | return; | |
390 | ||
391 | case BTRACE_FORMAT_BTS: | |
392 | record_btrace_print_bts_conf (&conf->bts); | |
393 | return; | |
b20a6524 MM |
394 | |
395 | case BTRACE_FORMAT_PT: | |
396 | record_btrace_print_pt_conf (&conf->pt); | |
397 | return; | |
d33501a5 MM |
398 | } |
399 | ||
400 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
401 | } | |
402 | ||
afedecd3 MM |
403 | /* The to_info_record method of target record-btrace. */ |
404 | ||
405 | static void | |
630d6a4a | 406 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
407 | { |
408 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 409 | const struct btrace_config *conf; |
afedecd3 | 410 | struct thread_info *tp; |
31fd9caa | 411 | unsigned int insns, calls, gaps; |
afedecd3 MM |
412 | |
413 | DEBUG ("info"); | |
414 | ||
415 | tp = find_thread_ptid (inferior_ptid); | |
416 | if (tp == NULL) | |
417 | error (_("No thread.")); | |
418 | ||
f4abbc16 MM |
419 | btinfo = &tp->btrace; |
420 | ||
421 | conf = btrace_conf (btinfo); | |
422 | if (conf != NULL) | |
d33501a5 | 423 | record_btrace_print_conf (conf); |
f4abbc16 | 424 | |
afedecd3 MM |
425 | btrace_fetch (tp); |
426 | ||
23a7fe75 MM |
427 | insns = 0; |
428 | calls = 0; | |
31fd9caa | 429 | gaps = 0; |
23a7fe75 | 430 | |
6e07b1d2 | 431 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
432 | { |
433 | struct btrace_call_iterator call; | |
434 | struct btrace_insn_iterator insn; | |
435 | ||
436 | btrace_call_end (&call, btinfo); | |
437 | btrace_call_prev (&call, 1); | |
5de9129b | 438 | calls = btrace_call_number (&call); |
23a7fe75 MM |
439 | |
440 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 441 | |
5de9129b | 442 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
443 | if (insns != 0) |
444 | { | |
445 | /* The last instruction does not really belong to the trace. */ | |
446 | insns -= 1; | |
447 | } | |
448 | else | |
449 | { | |
450 | unsigned int steps; | |
451 | ||
452 | /* Skip gaps at the end. */ | |
453 | do | |
454 | { | |
455 | steps = btrace_insn_prev (&insn, 1); | |
456 | if (steps == 0) | |
457 | break; | |
458 | ||
459 | insns = btrace_insn_number (&insn); | |
460 | } | |
461 | while (insns == 0); | |
462 | } | |
463 | ||
464 | gaps = btinfo->ngaps; | |
23a7fe75 | 465 | } |
afedecd3 | 466 | |
31fd9caa | 467 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
43792cf0 PA |
468 | "for thread %s (%s).\n"), insns, calls, gaps, |
469 | print_thread_id (tp), target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
470 | |
471 | if (btrace_is_replaying (tp)) | |
472 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
473 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
474 | } |
475 | ||
31fd9caa MM |
476 | /* Print a decode error. */ |
477 | ||
478 | static void | |
479 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
480 | enum btrace_format format) | |
481 | { | |
482 | const char *errstr; | |
483 | int is_error; | |
484 | ||
485 | errstr = _("unknown"); | |
486 | is_error = 1; | |
487 | ||
488 | switch (format) | |
489 | { | |
490 | default: | |
491 | break; | |
492 | ||
493 | case BTRACE_FORMAT_BTS: | |
494 | switch (errcode) | |
495 | { | |
496 | default: | |
497 | break; | |
498 | ||
499 | case BDE_BTS_OVERFLOW: | |
500 | errstr = _("instruction overflow"); | |
501 | break; | |
502 | ||
503 | case BDE_BTS_INSN_SIZE: | |
504 | errstr = _("unknown instruction"); | |
505 | break; | |
506 | } | |
507 | break; | |
b20a6524 MM |
508 | |
509 | #if defined (HAVE_LIBIPT) | |
510 | case BTRACE_FORMAT_PT: | |
511 | switch (errcode) | |
512 | { | |
513 | case BDE_PT_USER_QUIT: | |
514 | is_error = 0; | |
515 | errstr = _("trace decode cancelled"); | |
516 | break; | |
517 | ||
518 | case BDE_PT_DISABLED: | |
519 | is_error = 0; | |
520 | errstr = _("disabled"); | |
521 | break; | |
522 | ||
523 | case BDE_PT_OVERFLOW: | |
524 | is_error = 0; | |
525 | errstr = _("overflow"); | |
526 | break; | |
527 | ||
528 | default: | |
529 | if (errcode < 0) | |
530 | errstr = pt_errstr (pt_errcode (errcode)); | |
531 | break; | |
532 | } | |
533 | break; | |
534 | #endif /* defined (HAVE_LIBIPT) */ | |
31fd9caa MM |
535 | } |
536 | ||
537 | ui_out_text (uiout, _("[")); | |
538 | if (is_error) | |
539 | { | |
540 | ui_out_text (uiout, _("decode error (")); | |
541 | ui_out_field_int (uiout, "errcode", errcode); | |
542 | ui_out_text (uiout, _("): ")); | |
543 | } | |
544 | ui_out_text (uiout, errstr); | |
545 | ui_out_text (uiout, _("]\n")); | |
546 | } | |
547 | ||
afedecd3 MM |
548 | /* Print an unsigned int. */ |
549 | ||
550 | static void | |
551 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
552 | { | |
553 | ui_out_field_fmt (uiout, fld, "%u", val); | |
554 | } | |
555 | ||
f94cc897 MM |
556 | /* A range of source lines. */ |
557 | ||
558 | struct btrace_line_range | |
559 | { | |
560 | /* The symtab this line is from. */ | |
561 | struct symtab *symtab; | |
562 | ||
563 | /* The first line (inclusive). */ | |
564 | int begin; | |
565 | ||
566 | /* The last line (exclusive). */ | |
567 | int end; | |
568 | }; | |
569 | ||
570 | /* Construct a line range. */ | |
571 | ||
572 | static struct btrace_line_range | |
573 | btrace_mk_line_range (struct symtab *symtab, int begin, int end) | |
574 | { | |
575 | struct btrace_line_range range; | |
576 | ||
577 | range.symtab = symtab; | |
578 | range.begin = begin; | |
579 | range.end = end; | |
580 | ||
581 | return range; | |
582 | } | |
583 | ||
584 | /* Add a line to a line range. */ | |
585 | ||
586 | static struct btrace_line_range | |
587 | btrace_line_range_add (struct btrace_line_range range, int line) | |
588 | { | |
589 | if (range.end <= range.begin) | |
590 | { | |
591 | /* This is the first entry. */ | |
592 | range.begin = line; | |
593 | range.end = line + 1; | |
594 | } | |
595 | else if (line < range.begin) | |
596 | range.begin = line; | |
597 | else if (range.end < line) | |
598 | range.end = line; | |
599 | ||
600 | return range; | |
601 | } | |
602 | ||
603 | /* Return non-zero if RANGE is empty, zero otherwise. */ | |
604 | ||
605 | static int | |
606 | btrace_line_range_is_empty (struct btrace_line_range range) | |
607 | { | |
608 | return range.end <= range.begin; | |
609 | } | |
610 | ||
611 | /* Return non-zero if LHS contains RHS, zero otherwise. */ | |
612 | ||
613 | static int | |
614 | btrace_line_range_contains_range (struct btrace_line_range lhs, | |
615 | struct btrace_line_range rhs) | |
616 | { | |
617 | return ((lhs.symtab == rhs.symtab) | |
618 | && (lhs.begin <= rhs.begin) | |
619 | && (rhs.end <= lhs.end)); | |
620 | } | |
621 | ||
622 | /* Find the line range associated with PC. */ | |
623 | ||
624 | static struct btrace_line_range | |
625 | btrace_find_line_range (CORE_ADDR pc) | |
626 | { | |
627 | struct btrace_line_range range; | |
628 | struct linetable_entry *lines; | |
629 | struct linetable *ltable; | |
630 | struct symtab *symtab; | |
631 | int nlines, i; | |
632 | ||
633 | symtab = find_pc_line_symtab (pc); | |
634 | if (symtab == NULL) | |
635 | return btrace_mk_line_range (NULL, 0, 0); | |
636 | ||
637 | ltable = SYMTAB_LINETABLE (symtab); | |
638 | if (ltable == NULL) | |
639 | return btrace_mk_line_range (symtab, 0, 0); | |
640 | ||
641 | nlines = ltable->nitems; | |
642 | lines = ltable->item; | |
643 | if (nlines <= 0) | |
644 | return btrace_mk_line_range (symtab, 0, 0); | |
645 | ||
646 | range = btrace_mk_line_range (symtab, 0, 0); | |
647 | for (i = 0; i < nlines - 1; i++) | |
648 | { | |
649 | if ((lines[i].pc == pc) && (lines[i].line != 0)) | |
650 | range = btrace_line_range_add (range, lines[i].line); | |
651 | } | |
652 | ||
653 | return range; | |
654 | } | |
655 | ||
656 | /* Print source lines in LINES to UIOUT. | |
657 | ||
658 | UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
659 | instructions corresponding to that source line. When printing a new source | |
660 | line, we do the cleanups for the open chain and open a new cleanup chain for | |
661 | the new source line. If the source line range in LINES is not empty, this | |
662 | function will leave the cleanup chain for the last printed source line open | |
663 | so instructions can be added to it. */ | |
664 | ||
665 | static void | |
666 | btrace_print_lines (struct btrace_line_range lines, struct ui_out *uiout, | |
667 | struct cleanup **ui_item_chain, int flags) | |
668 | { | |
8d297bbf | 669 | print_source_lines_flags psl_flags; |
f94cc897 MM |
670 | int line; |
671 | ||
672 | psl_flags = 0; | |
673 | if (flags & DISASSEMBLY_FILENAME) | |
674 | psl_flags |= PRINT_SOURCE_LINES_FILENAME; | |
675 | ||
676 | for (line = lines.begin; line < lines.end; ++line) | |
677 | { | |
678 | if (*ui_item_chain != NULL) | |
679 | do_cleanups (*ui_item_chain); | |
680 | ||
681 | *ui_item_chain | |
682 | = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); | |
683 | ||
684 | print_source_lines (lines.symtab, line, line + 1, psl_flags); | |
685 | ||
686 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
687 | } | |
688 | } | |
689 | ||
afedecd3 MM |
690 | /* Disassemble a section of the recorded instruction trace. */ |
691 | ||
692 | static void | |
23a7fe75 | 693 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 694 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
695 | const struct btrace_insn_iterator *begin, |
696 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 | 697 | { |
f94cc897 MM |
698 | struct ui_file *stb; |
699 | struct cleanup *cleanups, *ui_item_chain; | |
700 | struct disassemble_info di; | |
afedecd3 | 701 | struct gdbarch *gdbarch; |
23a7fe75 | 702 | struct btrace_insn_iterator it; |
f94cc897 | 703 | struct btrace_line_range last_lines; |
afedecd3 | 704 | |
23a7fe75 MM |
705 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
706 | btrace_insn_number (end)); | |
afedecd3 | 707 | |
f94cc897 MM |
708 | flags |= DISASSEMBLY_SPECULATIVE; |
709 | ||
afedecd3 | 710 | gdbarch = target_gdbarch (); |
f94cc897 MM |
711 | stb = mem_fileopen (); |
712 | cleanups = make_cleanup_ui_file_delete (stb); | |
713 | di = gdb_disassemble_info (gdbarch, stb); | |
714 | last_lines = btrace_mk_line_range (NULL, 0, 0); | |
715 | ||
716 | make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); | |
717 | ||
718 | /* UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
719 | instructions corresponding to that line. */ | |
720 | ui_item_chain = NULL; | |
afedecd3 | 721 | |
23a7fe75 | 722 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 723 | { |
23a7fe75 MM |
724 | const struct btrace_insn *insn; |
725 | ||
726 | insn = btrace_insn_get (&it); | |
727 | ||
31fd9caa MM |
728 | /* A NULL instruction indicates a gap in the trace. */ |
729 | if (insn == NULL) | |
730 | { | |
731 | const struct btrace_config *conf; | |
732 | ||
733 | conf = btrace_conf (btinfo); | |
afedecd3 | 734 | |
31fd9caa MM |
735 | /* We have trace so we must have a configuration. */ |
736 | gdb_assert (conf != NULL); | |
737 | ||
738 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
739 | conf->format); | |
740 | } | |
741 | else | |
742 | { | |
f94cc897 | 743 | struct disasm_insn dinsn; |
da8c46d2 | 744 | |
f94cc897 | 745 | if ((flags & DISASSEMBLY_SOURCE) != 0) |
da8c46d2 | 746 | { |
f94cc897 MM |
747 | struct btrace_line_range lines; |
748 | ||
749 | lines = btrace_find_line_range (insn->pc); | |
750 | if (!btrace_line_range_is_empty (lines) | |
751 | && !btrace_line_range_contains_range (last_lines, lines)) | |
752 | { | |
753 | btrace_print_lines (lines, uiout, &ui_item_chain, flags); | |
754 | last_lines = lines; | |
755 | } | |
756 | else if (ui_item_chain == NULL) | |
757 | { | |
758 | ui_item_chain | |
759 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
760 | "src_and_asm_line"); | |
761 | /* No source information. */ | |
762 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
763 | } | |
764 | ||
765 | gdb_assert (ui_item_chain != NULL); | |
da8c46d2 | 766 | } |
da8c46d2 | 767 | |
f94cc897 MM |
768 | memset (&dinsn, 0, sizeof (dinsn)); |
769 | dinsn.number = btrace_insn_number (&it); | |
770 | dinsn.addr = insn->pc; | |
31fd9caa | 771 | |
da8c46d2 | 772 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) |
f94cc897 | 773 | dinsn.is_speculative = 1; |
da8c46d2 | 774 | |
f94cc897 | 775 | gdb_pretty_print_insn (gdbarch, uiout, &di, &dinsn, flags, stb); |
31fd9caa | 776 | } |
afedecd3 | 777 | } |
f94cc897 MM |
778 | |
779 | do_cleanups (cleanups); | |
afedecd3 MM |
780 | } |
781 | ||
782 | /* The to_insn_history method of target record-btrace. */ | |
783 | ||
784 | static void | |
7a6c5609 | 785 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
786 | { |
787 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
788 | struct btrace_insn_history *history; |
789 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
790 | struct cleanup *uiout_cleanup; |
791 | struct ui_out *uiout; | |
23a7fe75 | 792 | unsigned int context, covered; |
afedecd3 MM |
793 | |
794 | uiout = current_uiout; | |
795 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
796 | "insn history"); | |
afedecd3 | 797 | context = abs (size); |
afedecd3 MM |
798 | if (context == 0) |
799 | error (_("Bad record instruction-history-size.")); | |
800 | ||
23a7fe75 MM |
801 | btinfo = require_btrace (); |
802 | history = btinfo->insn_history; | |
803 | if (history == NULL) | |
afedecd3 | 804 | { |
07bbe694 | 805 | struct btrace_insn_iterator *replay; |
afedecd3 | 806 | |
23a7fe75 | 807 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 808 | |
07bbe694 MM |
809 | /* If we're replaying, we start at the replay position. Otherwise, we |
810 | start at the tail of the trace. */ | |
811 | replay = btinfo->replay; | |
812 | if (replay != NULL) | |
813 | begin = *replay; | |
814 | else | |
815 | btrace_insn_end (&begin, btinfo); | |
816 | ||
817 | /* We start from here and expand in the requested direction. Then we | |
818 | expand in the other direction, as well, to fill up any remaining | |
819 | context. */ | |
820 | end = begin; | |
821 | if (size < 0) | |
822 | { | |
823 | /* We want the current position covered, as well. */ | |
824 | covered = btrace_insn_next (&end, 1); | |
825 | covered += btrace_insn_prev (&begin, context - covered); | |
826 | covered += btrace_insn_next (&end, context - covered); | |
827 | } | |
828 | else | |
829 | { | |
830 | covered = btrace_insn_next (&end, context); | |
831 | covered += btrace_insn_prev (&begin, context - covered); | |
832 | } | |
afedecd3 MM |
833 | } |
834 | else | |
835 | { | |
23a7fe75 MM |
836 | begin = history->begin; |
837 | end = history->end; | |
afedecd3 | 838 | |
23a7fe75 MM |
839 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
840 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 841 | |
23a7fe75 MM |
842 | if (size < 0) |
843 | { | |
844 | end = begin; | |
845 | covered = btrace_insn_prev (&begin, context); | |
846 | } | |
847 | else | |
848 | { | |
849 | begin = end; | |
850 | covered = btrace_insn_next (&end, context); | |
851 | } | |
afedecd3 MM |
852 | } |
853 | ||
23a7fe75 | 854 | if (covered > 0) |
31fd9caa | 855 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
856 | else |
857 | { | |
858 | if (size < 0) | |
859 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
860 | else | |
861 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
862 | } | |
afedecd3 | 863 | |
23a7fe75 | 864 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
865 | do_cleanups (uiout_cleanup); |
866 | } | |
867 | ||
868 | /* The to_insn_history_range method of target record-btrace. */ | |
869 | ||
870 | static void | |
4e99c6b7 TT |
871 | record_btrace_insn_history_range (struct target_ops *self, |
872 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
873 | { |
874 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
875 | struct btrace_insn_history *history; |
876 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
877 | struct cleanup *uiout_cleanup; |
878 | struct ui_out *uiout; | |
23a7fe75 MM |
879 | unsigned int low, high; |
880 | int found; | |
afedecd3 MM |
881 | |
882 | uiout = current_uiout; | |
883 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
884 | "insn history"); | |
23a7fe75 MM |
885 | low = from; |
886 | high = to; | |
afedecd3 | 887 | |
23a7fe75 | 888 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
889 | |
890 | /* Check for wrap-arounds. */ | |
23a7fe75 | 891 | if (low != from || high != to) |
afedecd3 MM |
892 | error (_("Bad range.")); |
893 | ||
0688d04e | 894 | if (high < low) |
afedecd3 MM |
895 | error (_("Bad range.")); |
896 | ||
23a7fe75 | 897 | btinfo = require_btrace (); |
afedecd3 | 898 | |
23a7fe75 MM |
899 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
900 | if (found == 0) | |
901 | error (_("Range out of bounds.")); | |
afedecd3 | 902 | |
23a7fe75 MM |
903 | found = btrace_find_insn_by_number (&end, btinfo, high); |
904 | if (found == 0) | |
0688d04e MM |
905 | { |
906 | /* Silently truncate the range. */ | |
907 | btrace_insn_end (&end, btinfo); | |
908 | } | |
909 | else | |
910 | { | |
911 | /* We want both begin and end to be inclusive. */ | |
912 | btrace_insn_next (&end, 1); | |
913 | } | |
afedecd3 | 914 | |
31fd9caa | 915 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 916 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
917 | |
918 | do_cleanups (uiout_cleanup); | |
919 | } | |
920 | ||
921 | /* The to_insn_history_from method of target record-btrace. */ | |
922 | ||
923 | static void | |
9abc3ff3 TT |
924 | record_btrace_insn_history_from (struct target_ops *self, |
925 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
926 | { |
927 | ULONGEST begin, end, context; | |
928 | ||
929 | context = abs (size); | |
0688d04e MM |
930 | if (context == 0) |
931 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
932 | |
933 | if (size < 0) | |
934 | { | |
935 | end = from; | |
936 | ||
937 | if (from < context) | |
938 | begin = 0; | |
939 | else | |
0688d04e | 940 | begin = from - context + 1; |
afedecd3 MM |
941 | } |
942 | else | |
943 | { | |
944 | begin = from; | |
0688d04e | 945 | end = from + context - 1; |
afedecd3 MM |
946 | |
947 | /* Check for wrap-around. */ | |
948 | if (end < begin) | |
949 | end = ULONGEST_MAX; | |
950 | } | |
951 | ||
4e99c6b7 | 952 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
953 | } |
954 | ||
955 | /* Print the instruction number range for a function call history line. */ | |
956 | ||
957 | static void | |
23a7fe75 MM |
958 | btrace_call_history_insn_range (struct ui_out *uiout, |
959 | const struct btrace_function *bfun) | |
afedecd3 | 960 | { |
7acbe133 MM |
961 | unsigned int begin, end, size; |
962 | ||
963 | size = VEC_length (btrace_insn_s, bfun->insn); | |
964 | gdb_assert (size > 0); | |
afedecd3 | 965 | |
23a7fe75 | 966 | begin = bfun->insn_offset; |
7acbe133 | 967 | end = begin + size - 1; |
afedecd3 | 968 | |
23a7fe75 | 969 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 970 | ui_out_text (uiout, ","); |
23a7fe75 | 971 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
972 | } |
973 | ||
ce0dfbea MM |
974 | /* Compute the lowest and highest source line for the instructions in BFUN |
975 | and return them in PBEGIN and PEND. | |
976 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
977 | result from inlining or macro expansion. */ | |
978 | ||
979 | static void | |
980 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
981 | int *pbegin, int *pend) | |
982 | { | |
983 | struct btrace_insn *insn; | |
984 | struct symtab *symtab; | |
985 | struct symbol *sym; | |
986 | unsigned int idx; | |
987 | int begin, end; | |
988 | ||
989 | begin = INT_MAX; | |
990 | end = INT_MIN; | |
991 | ||
992 | sym = bfun->sym; | |
993 | if (sym == NULL) | |
994 | goto out; | |
995 | ||
996 | symtab = symbol_symtab (sym); | |
997 | ||
998 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
999 | { | |
1000 | struct symtab_and_line sal; | |
1001 | ||
1002 | sal = find_pc_line (insn->pc, 0); | |
1003 | if (sal.symtab != symtab || sal.line == 0) | |
1004 | continue; | |
1005 | ||
1006 | begin = min (begin, sal.line); | |
1007 | end = max (end, sal.line); | |
1008 | } | |
1009 | ||
1010 | out: | |
1011 | *pbegin = begin; | |
1012 | *pend = end; | |
1013 | } | |
1014 | ||
afedecd3 MM |
1015 | /* Print the source line information for a function call history line. */ |
1016 | ||
1017 | static void | |
23a7fe75 MM |
1018 | btrace_call_history_src_line (struct ui_out *uiout, |
1019 | const struct btrace_function *bfun) | |
afedecd3 MM |
1020 | { |
1021 | struct symbol *sym; | |
23a7fe75 | 1022 | int begin, end; |
afedecd3 MM |
1023 | |
1024 | sym = bfun->sym; | |
1025 | if (sym == NULL) | |
1026 | return; | |
1027 | ||
1028 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 1029 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 1030 | |
ce0dfbea | 1031 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 1032 | if (end < begin) |
afedecd3 MM |
1033 | return; |
1034 | ||
1035 | ui_out_text (uiout, ":"); | |
23a7fe75 | 1036 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 1037 | |
23a7fe75 | 1038 | if (end == begin) |
afedecd3 MM |
1039 | return; |
1040 | ||
8710b709 | 1041 | ui_out_text (uiout, ","); |
23a7fe75 | 1042 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
1043 | } |
1044 | ||
0b722aec MM |
1045 | /* Get the name of a branch trace function. */ |
1046 | ||
1047 | static const char * | |
1048 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
1049 | { | |
1050 | struct minimal_symbol *msym; | |
1051 | struct symbol *sym; | |
1052 | ||
1053 | if (bfun == NULL) | |
1054 | return "??"; | |
1055 | ||
1056 | msym = bfun->msym; | |
1057 | sym = bfun->sym; | |
1058 | ||
1059 | if (sym != NULL) | |
1060 | return SYMBOL_PRINT_NAME (sym); | |
1061 | else if (msym != NULL) | |
efd66ac6 | 1062 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
1063 | else |
1064 | return "??"; | |
1065 | } | |
1066 | ||
afedecd3 MM |
1067 | /* Disassemble a section of the recorded function trace. */ |
1068 | ||
1069 | static void | |
23a7fe75 | 1070 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 1071 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
1072 | const struct btrace_call_iterator *begin, |
1073 | const struct btrace_call_iterator *end, | |
8d297bbf | 1074 | int int_flags) |
afedecd3 | 1075 | { |
23a7fe75 | 1076 | struct btrace_call_iterator it; |
8d297bbf | 1077 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 | 1078 | |
8d297bbf | 1079 | DEBUG ("ftrace (0x%x): [%u; %u)", int_flags, btrace_call_number (begin), |
23a7fe75 | 1080 | btrace_call_number (end)); |
afedecd3 | 1081 | |
23a7fe75 | 1082 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 1083 | { |
23a7fe75 MM |
1084 | const struct btrace_function *bfun; |
1085 | struct minimal_symbol *msym; | |
1086 | struct symbol *sym; | |
1087 | ||
1088 | bfun = btrace_call_get (&it); | |
23a7fe75 | 1089 | sym = bfun->sym; |
0b722aec | 1090 | msym = bfun->msym; |
23a7fe75 | 1091 | |
afedecd3 | 1092 | /* Print the function index. */ |
23a7fe75 | 1093 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
1094 | ui_out_text (uiout, "\t"); |
1095 | ||
31fd9caa MM |
1096 | /* Indicate gaps in the trace. */ |
1097 | if (bfun->errcode != 0) | |
1098 | { | |
1099 | const struct btrace_config *conf; | |
1100 | ||
1101 | conf = btrace_conf (btinfo); | |
1102 | ||
1103 | /* We have trace so we must have a configuration. */ | |
1104 | gdb_assert (conf != NULL); | |
1105 | ||
1106 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
1107 | ||
1108 | continue; | |
1109 | } | |
1110 | ||
8710b709 MM |
1111 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
1112 | { | |
1113 | int level = bfun->level + btinfo->level, i; | |
1114 | ||
1115 | for (i = 0; i < level; ++i) | |
1116 | ui_out_text (uiout, " "); | |
1117 | } | |
1118 | ||
1119 | if (sym != NULL) | |
1120 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
1121 | else if (msym != NULL) | |
efd66ac6 | 1122 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
1123 | else if (!ui_out_is_mi_like_p (uiout)) |
1124 | ui_out_field_string (uiout, "function", "??"); | |
1125 | ||
1e038f67 | 1126 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 1127 | { |
8710b709 | 1128 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 1129 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
1130 | } |
1131 | ||
1e038f67 | 1132 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 1133 | { |
8710b709 | 1134 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 1135 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
1136 | } |
1137 | ||
afedecd3 MM |
1138 | ui_out_text (uiout, "\n"); |
1139 | } | |
1140 | } | |
1141 | ||
1142 | /* The to_call_history method of target record-btrace. */ | |
1143 | ||
1144 | static void | |
8d297bbf | 1145 | record_btrace_call_history (struct target_ops *self, int size, int int_flags) |
afedecd3 MM |
1146 | { |
1147 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1148 | struct btrace_call_history *history; |
1149 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1150 | struct cleanup *uiout_cleanup; |
1151 | struct ui_out *uiout; | |
23a7fe75 | 1152 | unsigned int context, covered; |
8d297bbf | 1153 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1154 | |
1155 | uiout = current_uiout; | |
1156 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1157 | "insn history"); | |
afedecd3 | 1158 | context = abs (size); |
afedecd3 MM |
1159 | if (context == 0) |
1160 | error (_("Bad record function-call-history-size.")); | |
1161 | ||
23a7fe75 MM |
1162 | btinfo = require_btrace (); |
1163 | history = btinfo->call_history; | |
1164 | if (history == NULL) | |
afedecd3 | 1165 | { |
07bbe694 | 1166 | struct btrace_insn_iterator *replay; |
afedecd3 | 1167 | |
8d297bbf | 1168 | DEBUG ("call-history (0x%x): %d", int_flags, size); |
afedecd3 | 1169 | |
07bbe694 MM |
1170 | /* If we're replaying, we start at the replay position. Otherwise, we |
1171 | start at the tail of the trace. */ | |
1172 | replay = btinfo->replay; | |
1173 | if (replay != NULL) | |
1174 | { | |
1175 | begin.function = replay->function; | |
1176 | begin.btinfo = btinfo; | |
1177 | } | |
1178 | else | |
1179 | btrace_call_end (&begin, btinfo); | |
1180 | ||
1181 | /* We start from here and expand in the requested direction. Then we | |
1182 | expand in the other direction, as well, to fill up any remaining | |
1183 | context. */ | |
1184 | end = begin; | |
1185 | if (size < 0) | |
1186 | { | |
1187 | /* We want the current position covered, as well. */ | |
1188 | covered = btrace_call_next (&end, 1); | |
1189 | covered += btrace_call_prev (&begin, context - covered); | |
1190 | covered += btrace_call_next (&end, context - covered); | |
1191 | } | |
1192 | else | |
1193 | { | |
1194 | covered = btrace_call_next (&end, context); | |
1195 | covered += btrace_call_prev (&begin, context- covered); | |
1196 | } | |
afedecd3 MM |
1197 | } |
1198 | else | |
1199 | { | |
23a7fe75 MM |
1200 | begin = history->begin; |
1201 | end = history->end; | |
afedecd3 | 1202 | |
8d297bbf | 1203 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", int_flags, size, |
23a7fe75 | 1204 | btrace_call_number (&begin), btrace_call_number (&end)); |
afedecd3 | 1205 | |
23a7fe75 MM |
1206 | if (size < 0) |
1207 | { | |
1208 | end = begin; | |
1209 | covered = btrace_call_prev (&begin, context); | |
1210 | } | |
1211 | else | |
1212 | { | |
1213 | begin = end; | |
1214 | covered = btrace_call_next (&end, context); | |
1215 | } | |
afedecd3 MM |
1216 | } |
1217 | ||
23a7fe75 | 1218 | if (covered > 0) |
8710b709 | 1219 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1220 | else |
1221 | { | |
1222 | if (size < 0) | |
1223 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
1224 | else | |
1225 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
1226 | } | |
afedecd3 | 1227 | |
23a7fe75 | 1228 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1229 | do_cleanups (uiout_cleanup); |
1230 | } | |
1231 | ||
1232 | /* The to_call_history_range method of target record-btrace. */ | |
1233 | ||
1234 | static void | |
f0d960ea | 1235 | record_btrace_call_history_range (struct target_ops *self, |
8d297bbf PA |
1236 | ULONGEST from, ULONGEST to, |
1237 | int int_flags) | |
afedecd3 MM |
1238 | { |
1239 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1240 | struct btrace_call_history *history; |
1241 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1242 | struct cleanup *uiout_cleanup; |
1243 | struct ui_out *uiout; | |
23a7fe75 MM |
1244 | unsigned int low, high; |
1245 | int found; | |
8d297bbf | 1246 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1247 | |
1248 | uiout = current_uiout; | |
1249 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1250 | "func history"); | |
23a7fe75 MM |
1251 | low = from; |
1252 | high = to; | |
afedecd3 | 1253 | |
8d297bbf | 1254 | DEBUG ("call-history (0x%x): [%u; %u)", int_flags, low, high); |
afedecd3 MM |
1255 | |
1256 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1257 | if (low != from || high != to) |
afedecd3 MM |
1258 | error (_("Bad range.")); |
1259 | ||
0688d04e | 1260 | if (high < low) |
afedecd3 MM |
1261 | error (_("Bad range.")); |
1262 | ||
23a7fe75 | 1263 | btinfo = require_btrace (); |
afedecd3 | 1264 | |
23a7fe75 MM |
1265 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1266 | if (found == 0) | |
1267 | error (_("Range out of bounds.")); | |
afedecd3 | 1268 | |
23a7fe75 MM |
1269 | found = btrace_find_call_by_number (&end, btinfo, high); |
1270 | if (found == 0) | |
0688d04e MM |
1271 | { |
1272 | /* Silently truncate the range. */ | |
1273 | btrace_call_end (&end, btinfo); | |
1274 | } | |
1275 | else | |
1276 | { | |
1277 | /* We want both begin and end to be inclusive. */ | |
1278 | btrace_call_next (&end, 1); | |
1279 | } | |
afedecd3 | 1280 | |
8710b709 | 1281 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1282 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1283 | |
1284 | do_cleanups (uiout_cleanup); | |
1285 | } | |
1286 | ||
1287 | /* The to_call_history_from method of target record-btrace. */ | |
1288 | ||
1289 | static void | |
ec0aea04 | 1290 | record_btrace_call_history_from (struct target_ops *self, |
8d297bbf PA |
1291 | ULONGEST from, int size, |
1292 | int int_flags) | |
afedecd3 MM |
1293 | { |
1294 | ULONGEST begin, end, context; | |
8d297bbf | 1295 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1296 | |
1297 | context = abs (size); | |
0688d04e MM |
1298 | if (context == 0) |
1299 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1300 | |
1301 | if (size < 0) | |
1302 | { | |
1303 | end = from; | |
1304 | ||
1305 | if (from < context) | |
1306 | begin = 0; | |
1307 | else | |
0688d04e | 1308 | begin = from - context + 1; |
afedecd3 MM |
1309 | } |
1310 | else | |
1311 | { | |
1312 | begin = from; | |
0688d04e | 1313 | end = from + context - 1; |
afedecd3 MM |
1314 | |
1315 | /* Check for wrap-around. */ | |
1316 | if (end < begin) | |
1317 | end = ULONGEST_MAX; | |
1318 | } | |
1319 | ||
f0d960ea | 1320 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1321 | } |
1322 | ||
07bbe694 MM |
1323 | /* The to_record_is_replaying method of target record-btrace. */ |
1324 | ||
1325 | static int | |
a52eab48 | 1326 | record_btrace_is_replaying (struct target_ops *self, ptid_t ptid) |
07bbe694 MM |
1327 | { |
1328 | struct thread_info *tp; | |
1329 | ||
034f788c | 1330 | ALL_NON_EXITED_THREADS (tp) |
a52eab48 | 1331 | if (ptid_match (tp->ptid, ptid) && btrace_is_replaying (tp)) |
07bbe694 MM |
1332 | return 1; |
1333 | ||
1334 | return 0; | |
1335 | } | |
1336 | ||
7ff27e9b MM |
1337 | /* The to_record_will_replay method of target record-btrace. */ |
1338 | ||
1339 | static int | |
1340 | record_btrace_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1341 | { | |
1342 | return dir == EXEC_REVERSE || record_btrace_is_replaying (self, ptid); | |
1343 | } | |
1344 | ||
633785ff MM |
1345 | /* The to_xfer_partial method of target record-btrace. */ |
1346 | ||
9b409511 | 1347 | static enum target_xfer_status |
633785ff MM |
1348 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1349 | const char *annex, gdb_byte *readbuf, | |
1350 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1351 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1352 | { |
1353 | struct target_ops *t; | |
1354 | ||
1355 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1356 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1357 | && !record_btrace_generating_corefile |
4d10e986 | 1358 | && record_btrace_is_replaying (ops, inferior_ptid)) |
633785ff MM |
1359 | { |
1360 | switch (object) | |
1361 | { | |
1362 | case TARGET_OBJECT_MEMORY: | |
1363 | { | |
1364 | struct target_section *section; | |
1365 | ||
1366 | /* We do not allow writing memory in general. */ | |
1367 | if (writebuf != NULL) | |
9b409511 YQ |
1368 | { |
1369 | *xfered_len = len; | |
bc113b4e | 1370 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1371 | } |
633785ff MM |
1372 | |
1373 | /* We allow reading readonly memory. */ | |
1374 | section = target_section_by_addr (ops, offset); | |
1375 | if (section != NULL) | |
1376 | { | |
1377 | /* Check if the section we found is readonly. */ | |
1378 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1379 | section->the_bfd_section) | |
1380 | & SEC_READONLY) != 0) | |
1381 | { | |
1382 | /* Truncate the request to fit into this section. */ | |
1383 | len = min (len, section->endaddr - offset); | |
1384 | break; | |
1385 | } | |
1386 | } | |
1387 | ||
9b409511 | 1388 | *xfered_len = len; |
bc113b4e | 1389 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1390 | } |
1391 | } | |
1392 | } | |
1393 | ||
1394 | /* Forward the request. */ | |
e75fdfca TT |
1395 | ops = ops->beneath; |
1396 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1397 | offset, len, xfered_len); | |
633785ff MM |
1398 | } |
1399 | ||
1400 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1401 | ||
1402 | static int | |
1403 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1404 | struct gdbarch *gdbarch, | |
1405 | struct bp_target_info *bp_tgt) | |
1406 | { | |
67b5c0c1 MM |
1407 | const char *old; |
1408 | int ret; | |
633785ff MM |
1409 | |
1410 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1411 | duration of this function. */ | |
67b5c0c1 MM |
1412 | old = replay_memory_access; |
1413 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1414 | |
1415 | ret = 0; | |
492d29ea PA |
1416 | TRY |
1417 | { | |
1418 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1419 | } | |
492d29ea PA |
1420 | CATCH (except, RETURN_MASK_ALL) |
1421 | { | |
6c63c96a | 1422 | replay_memory_access = old; |
492d29ea PA |
1423 | throw_exception (except); |
1424 | } | |
1425 | END_CATCH | |
6c63c96a | 1426 | replay_memory_access = old; |
633785ff MM |
1427 | |
1428 | return ret; | |
1429 | } | |
1430 | ||
1431 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1432 | ||
1433 | static int | |
1434 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1435 | struct gdbarch *gdbarch, | |
73971819 PA |
1436 | struct bp_target_info *bp_tgt, |
1437 | enum remove_bp_reason reason) | |
633785ff | 1438 | { |
67b5c0c1 MM |
1439 | const char *old; |
1440 | int ret; | |
633785ff MM |
1441 | |
1442 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1443 | duration of this function. */ | |
67b5c0c1 MM |
1444 | old = replay_memory_access; |
1445 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1446 | |
1447 | ret = 0; | |
492d29ea PA |
1448 | TRY |
1449 | { | |
73971819 PA |
1450 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt, |
1451 | reason); | |
492d29ea | 1452 | } |
492d29ea PA |
1453 | CATCH (except, RETURN_MASK_ALL) |
1454 | { | |
6c63c96a | 1455 | replay_memory_access = old; |
492d29ea PA |
1456 | throw_exception (except); |
1457 | } | |
1458 | END_CATCH | |
6c63c96a | 1459 | replay_memory_access = old; |
633785ff MM |
1460 | |
1461 | return ret; | |
1462 | } | |
1463 | ||
1f3ef581 MM |
1464 | /* The to_fetch_registers method of target record-btrace. */ |
1465 | ||
1466 | static void | |
1467 | record_btrace_fetch_registers (struct target_ops *ops, | |
1468 | struct regcache *regcache, int regno) | |
1469 | { | |
1470 | struct btrace_insn_iterator *replay; | |
1471 | struct thread_info *tp; | |
1472 | ||
1473 | tp = find_thread_ptid (inferior_ptid); | |
1474 | gdb_assert (tp != NULL); | |
1475 | ||
1476 | replay = tp->btrace.replay; | |
aef92902 | 1477 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1478 | { |
1479 | const struct btrace_insn *insn; | |
1480 | struct gdbarch *gdbarch; | |
1481 | int pcreg; | |
1482 | ||
1483 | gdbarch = get_regcache_arch (regcache); | |
1484 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1485 | if (pcreg < 0) | |
1486 | return; | |
1487 | ||
1488 | /* We can only provide the PC register. */ | |
1489 | if (regno >= 0 && regno != pcreg) | |
1490 | return; | |
1491 | ||
1492 | insn = btrace_insn_get (replay); | |
1493 | gdb_assert (insn != NULL); | |
1494 | ||
1495 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1496 | } | |
1497 | else | |
1498 | { | |
e75fdfca | 1499 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1500 | |
e75fdfca | 1501 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1502 | } |
1503 | } | |
1504 | ||
1505 | /* The to_store_registers method of target record-btrace. */ | |
1506 | ||
1507 | static void | |
1508 | record_btrace_store_registers (struct target_ops *ops, | |
1509 | struct regcache *regcache, int regno) | |
1510 | { | |
1511 | struct target_ops *t; | |
1512 | ||
a52eab48 | 1513 | if (!record_btrace_generating_corefile |
4d10e986 MM |
1514 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1515 | error (_("Cannot write registers while replaying.")); | |
1f3ef581 MM |
1516 | |
1517 | gdb_assert (may_write_registers != 0); | |
1518 | ||
e75fdfca TT |
1519 | t = ops->beneath; |
1520 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1521 | } |
1522 | ||
1523 | /* The to_prepare_to_store method of target record-btrace. */ | |
1524 | ||
1525 | static void | |
1526 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1527 | struct regcache *regcache) | |
1528 | { | |
1529 | struct target_ops *t; | |
1530 | ||
a52eab48 | 1531 | if (!record_btrace_generating_corefile |
4d10e986 | 1532 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1f3ef581 MM |
1533 | return; |
1534 | ||
e75fdfca TT |
1535 | t = ops->beneath; |
1536 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1537 | } |
1538 | ||
0b722aec MM |
1539 | /* The branch trace frame cache. */ |
1540 | ||
1541 | struct btrace_frame_cache | |
1542 | { | |
1543 | /* The thread. */ | |
1544 | struct thread_info *tp; | |
1545 | ||
1546 | /* The frame info. */ | |
1547 | struct frame_info *frame; | |
1548 | ||
1549 | /* The branch trace function segment. */ | |
1550 | const struct btrace_function *bfun; | |
1551 | }; | |
1552 | ||
1553 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1554 | ||
1555 | static htab_t bfcache; | |
1556 | ||
1557 | /* hash_f for htab_create_alloc of bfcache. */ | |
1558 | ||
1559 | static hashval_t | |
1560 | bfcache_hash (const void *arg) | |
1561 | { | |
19ba03f4 SM |
1562 | const struct btrace_frame_cache *cache |
1563 | = (const struct btrace_frame_cache *) arg; | |
0b722aec MM |
1564 | |
1565 | return htab_hash_pointer (cache->frame); | |
1566 | } | |
1567 | ||
1568 | /* eq_f for htab_create_alloc of bfcache. */ | |
1569 | ||
1570 | static int | |
1571 | bfcache_eq (const void *arg1, const void *arg2) | |
1572 | { | |
19ba03f4 SM |
1573 | const struct btrace_frame_cache *cache1 |
1574 | = (const struct btrace_frame_cache *) arg1; | |
1575 | const struct btrace_frame_cache *cache2 | |
1576 | = (const struct btrace_frame_cache *) arg2; | |
0b722aec MM |
1577 | |
1578 | return cache1->frame == cache2->frame; | |
1579 | } | |
1580 | ||
1581 | /* Create a new btrace frame cache. */ | |
1582 | ||
1583 | static struct btrace_frame_cache * | |
1584 | bfcache_new (struct frame_info *frame) | |
1585 | { | |
1586 | struct btrace_frame_cache *cache; | |
1587 | void **slot; | |
1588 | ||
1589 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1590 | cache->frame = frame; | |
1591 | ||
1592 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1593 | gdb_assert (*slot == NULL); | |
1594 | *slot = cache; | |
1595 | ||
1596 | return cache; | |
1597 | } | |
1598 | ||
1599 | /* Extract the branch trace function from a branch trace frame. */ | |
1600 | ||
1601 | static const struct btrace_function * | |
1602 | btrace_get_frame_function (struct frame_info *frame) | |
1603 | { | |
1604 | const struct btrace_frame_cache *cache; | |
1605 | const struct btrace_function *bfun; | |
1606 | struct btrace_frame_cache pattern; | |
1607 | void **slot; | |
1608 | ||
1609 | pattern.frame = frame; | |
1610 | ||
1611 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1612 | if (slot == NULL) | |
1613 | return NULL; | |
1614 | ||
19ba03f4 | 1615 | cache = (const struct btrace_frame_cache *) *slot; |
0b722aec MM |
1616 | return cache->bfun; |
1617 | } | |
1618 | ||
cecac1ab MM |
1619 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1620 | ||
1621 | static enum unwind_stop_reason | |
1622 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1623 | void **this_cache) | |
1624 | { | |
0b722aec MM |
1625 | const struct btrace_frame_cache *cache; |
1626 | const struct btrace_function *bfun; | |
1627 | ||
19ba03f4 | 1628 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1629 | bfun = cache->bfun; |
1630 | gdb_assert (bfun != NULL); | |
1631 | ||
1632 | if (bfun->up == NULL) | |
1633 | return UNWIND_UNAVAILABLE; | |
1634 | ||
1635 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1636 | } |
1637 | ||
1638 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1639 | ||
1640 | static void | |
1641 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1642 | struct frame_id *this_id) | |
1643 | { | |
0b722aec MM |
1644 | const struct btrace_frame_cache *cache; |
1645 | const struct btrace_function *bfun; | |
1646 | CORE_ADDR code, special; | |
1647 | ||
19ba03f4 | 1648 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1649 | |
1650 | bfun = cache->bfun; | |
1651 | gdb_assert (bfun != NULL); | |
1652 | ||
1653 | while (bfun->segment.prev != NULL) | |
1654 | bfun = bfun->segment.prev; | |
1655 | ||
1656 | code = get_frame_func (this_frame); | |
1657 | special = bfun->number; | |
1658 | ||
1659 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1660 | ||
1661 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1662 | btrace_get_bfun_name (cache->bfun), | |
1663 | core_addr_to_string_nz (this_id->code_addr), | |
1664 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1665 | } |
1666 | ||
1667 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1668 | ||
1669 | static struct value * | |
1670 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1671 | void **this_cache, | |
1672 | int regnum) | |
1673 | { | |
0b722aec MM |
1674 | const struct btrace_frame_cache *cache; |
1675 | const struct btrace_function *bfun, *caller; | |
1676 | const struct btrace_insn *insn; | |
1677 | struct gdbarch *gdbarch; | |
1678 | CORE_ADDR pc; | |
1679 | int pcreg; | |
1680 | ||
1681 | gdbarch = get_frame_arch (this_frame); | |
1682 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1683 | if (pcreg < 0 || regnum != pcreg) | |
1684 | throw_error (NOT_AVAILABLE_ERROR, | |
1685 | _("Registers are not available in btrace record history")); | |
1686 | ||
19ba03f4 | 1687 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1688 | bfun = cache->bfun; |
1689 | gdb_assert (bfun != NULL); | |
1690 | ||
1691 | caller = bfun->up; | |
1692 | if (caller == NULL) | |
1693 | throw_error (NOT_AVAILABLE_ERROR, | |
1694 | _("No caller in btrace record history")); | |
1695 | ||
1696 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1697 | { | |
1698 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1699 | pc = insn->pc; | |
1700 | } | |
1701 | else | |
1702 | { | |
1703 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1704 | pc = insn->pc; | |
1705 | ||
1706 | pc += gdb_insn_length (gdbarch, pc); | |
1707 | } | |
1708 | ||
1709 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1710 | btrace_get_bfun_name (bfun), bfun->level, | |
1711 | core_addr_to_string_nz (pc)); | |
1712 | ||
1713 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1714 | } |
1715 | ||
1716 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1717 | ||
1718 | static int | |
1719 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1720 | struct frame_info *this_frame, | |
1721 | void **this_cache) | |
1722 | { | |
0b722aec MM |
1723 | const struct btrace_function *bfun; |
1724 | struct btrace_frame_cache *cache; | |
cecac1ab | 1725 | struct thread_info *tp; |
0b722aec | 1726 | struct frame_info *next; |
cecac1ab MM |
1727 | |
1728 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1729 | tp = find_thread_ptid (inferior_ptid); | |
1730 | gdb_assert (tp != NULL); | |
1731 | ||
0b722aec MM |
1732 | bfun = NULL; |
1733 | next = get_next_frame (this_frame); | |
1734 | if (next == NULL) | |
1735 | { | |
1736 | const struct btrace_insn_iterator *replay; | |
1737 | ||
1738 | replay = tp->btrace.replay; | |
1739 | if (replay != NULL) | |
1740 | bfun = replay->function; | |
1741 | } | |
1742 | else | |
1743 | { | |
1744 | const struct btrace_function *callee; | |
1745 | ||
1746 | callee = btrace_get_frame_function (next); | |
1747 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1748 | bfun = callee->up; | |
1749 | } | |
1750 | ||
1751 | if (bfun == NULL) | |
1752 | return 0; | |
1753 | ||
1754 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1755 | btrace_get_bfun_name (bfun), bfun->level); | |
1756 | ||
1757 | /* This is our frame. Initialize the frame cache. */ | |
1758 | cache = bfcache_new (this_frame); | |
1759 | cache->tp = tp; | |
1760 | cache->bfun = bfun; | |
1761 | ||
1762 | *this_cache = cache; | |
1763 | return 1; | |
1764 | } | |
1765 | ||
1766 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1767 | ||
1768 | static int | |
1769 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1770 | struct frame_info *this_frame, | |
1771 | void **this_cache) | |
1772 | { | |
1773 | const struct btrace_function *bfun, *callee; | |
1774 | struct btrace_frame_cache *cache; | |
1775 | struct frame_info *next; | |
1776 | ||
1777 | next = get_next_frame (this_frame); | |
1778 | if (next == NULL) | |
1779 | return 0; | |
1780 | ||
1781 | callee = btrace_get_frame_function (next); | |
1782 | if (callee == NULL) | |
1783 | return 0; | |
1784 | ||
1785 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1786 | return 0; | |
1787 | ||
1788 | bfun = callee->up; | |
1789 | if (bfun == NULL) | |
1790 | return 0; | |
1791 | ||
1792 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1793 | btrace_get_bfun_name (bfun), bfun->level); | |
1794 | ||
1795 | /* This is our frame. Initialize the frame cache. */ | |
1796 | cache = bfcache_new (this_frame); | |
1797 | cache->tp = find_thread_ptid (inferior_ptid); | |
1798 | cache->bfun = bfun; | |
1799 | ||
1800 | *this_cache = cache; | |
1801 | return 1; | |
1802 | } | |
1803 | ||
1804 | static void | |
1805 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1806 | { | |
1807 | struct btrace_frame_cache *cache; | |
1808 | void **slot; | |
1809 | ||
19ba03f4 | 1810 | cache = (struct btrace_frame_cache *) this_cache; |
0b722aec MM |
1811 | |
1812 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1813 | gdb_assert (slot != NULL); | |
1814 | ||
1815 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1816 | } |
1817 | ||
1818 | /* btrace recording does not store previous memory content, neither the stack | |
1819 | frames content. Any unwinding would return errorneous results as the stack | |
1820 | contents no longer matches the changed PC value restored from history. | |
1821 | Therefore this unwinder reports any possibly unwound registers as | |
1822 | <unavailable>. */ | |
1823 | ||
0b722aec | 1824 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1825 | { |
1826 | NORMAL_FRAME, | |
1827 | record_btrace_frame_unwind_stop_reason, | |
1828 | record_btrace_frame_this_id, | |
1829 | record_btrace_frame_prev_register, | |
1830 | NULL, | |
0b722aec MM |
1831 | record_btrace_frame_sniffer, |
1832 | record_btrace_frame_dealloc_cache | |
1833 | }; | |
1834 | ||
1835 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1836 | { | |
1837 | TAILCALL_FRAME, | |
1838 | record_btrace_frame_unwind_stop_reason, | |
1839 | record_btrace_frame_this_id, | |
1840 | record_btrace_frame_prev_register, | |
1841 | NULL, | |
1842 | record_btrace_tailcall_frame_sniffer, | |
1843 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1844 | }; |
b2f4cfde | 1845 | |
ac01945b TT |
1846 | /* Implement the to_get_unwinder method. */ |
1847 | ||
1848 | static const struct frame_unwind * | |
1849 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1850 | { | |
1851 | return &record_btrace_frame_unwind; | |
1852 | } | |
1853 | ||
1854 | /* Implement the to_get_tailcall_unwinder method. */ | |
1855 | ||
1856 | static const struct frame_unwind * | |
1857 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1858 | { | |
1859 | return &record_btrace_tailcall_frame_unwind; | |
1860 | } | |
1861 | ||
987e68b1 MM |
1862 | /* Return a human-readable string for FLAG. */ |
1863 | ||
1864 | static const char * | |
1865 | btrace_thread_flag_to_str (enum btrace_thread_flag flag) | |
1866 | { | |
1867 | switch (flag) | |
1868 | { | |
1869 | case BTHR_STEP: | |
1870 | return "step"; | |
1871 | ||
1872 | case BTHR_RSTEP: | |
1873 | return "reverse-step"; | |
1874 | ||
1875 | case BTHR_CONT: | |
1876 | return "cont"; | |
1877 | ||
1878 | case BTHR_RCONT: | |
1879 | return "reverse-cont"; | |
1880 | ||
1881 | case BTHR_STOP: | |
1882 | return "stop"; | |
1883 | } | |
1884 | ||
1885 | return "<invalid>"; | |
1886 | } | |
1887 | ||
52834460 MM |
1888 | /* Indicate that TP should be resumed according to FLAG. */ |
1889 | ||
1890 | static void | |
1891 | record_btrace_resume_thread (struct thread_info *tp, | |
1892 | enum btrace_thread_flag flag) | |
1893 | { | |
1894 | struct btrace_thread_info *btinfo; | |
1895 | ||
43792cf0 | 1896 | DEBUG ("resuming thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 | 1897 | target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag)); |
52834460 MM |
1898 | |
1899 | btinfo = &tp->btrace; | |
1900 | ||
52834460 MM |
1901 | /* Fetch the latest branch trace. */ |
1902 | btrace_fetch (tp); | |
1903 | ||
0ca912df MM |
1904 | /* A resume request overwrites a preceding resume or stop request. */ |
1905 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1906 | btinfo->flags |= flag; |
1907 | } | |
1908 | ||
ec71cc2f MM |
1909 | /* Get the current frame for TP. */ |
1910 | ||
1911 | static struct frame_info * | |
1912 | get_thread_current_frame (struct thread_info *tp) | |
1913 | { | |
1914 | struct frame_info *frame; | |
1915 | ptid_t old_inferior_ptid; | |
1916 | int executing; | |
1917 | ||
1918 | /* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */ | |
1919 | old_inferior_ptid = inferior_ptid; | |
1920 | inferior_ptid = tp->ptid; | |
1921 | ||
1922 | /* Clear the executing flag to allow changes to the current frame. | |
1923 | We are not actually running, yet. We just started a reverse execution | |
1924 | command or a record goto command. | |
1925 | For the latter, EXECUTING is false and this has no effect. | |
1926 | For the former, EXECUTING is true and we're in to_wait, about to | |
1927 | move the thread. Since we need to recompute the stack, we temporarily | |
1928 | set EXECUTING to flase. */ | |
1929 | executing = is_executing (inferior_ptid); | |
1930 | set_executing (inferior_ptid, 0); | |
1931 | ||
1932 | frame = NULL; | |
1933 | TRY | |
1934 | { | |
1935 | frame = get_current_frame (); | |
1936 | } | |
1937 | CATCH (except, RETURN_MASK_ALL) | |
1938 | { | |
1939 | /* Restore the previous execution state. */ | |
1940 | set_executing (inferior_ptid, executing); | |
1941 | ||
1942 | /* Restore the previous inferior_ptid. */ | |
1943 | inferior_ptid = old_inferior_ptid; | |
1944 | ||
1945 | throw_exception (except); | |
1946 | } | |
1947 | END_CATCH | |
1948 | ||
1949 | /* Restore the previous execution state. */ | |
1950 | set_executing (inferior_ptid, executing); | |
1951 | ||
1952 | /* Restore the previous inferior_ptid. */ | |
1953 | inferior_ptid = old_inferior_ptid; | |
1954 | ||
1955 | return frame; | |
1956 | } | |
1957 | ||
52834460 MM |
1958 | /* Start replaying a thread. */ |
1959 | ||
1960 | static struct btrace_insn_iterator * | |
1961 | record_btrace_start_replaying (struct thread_info *tp) | |
1962 | { | |
52834460 MM |
1963 | struct btrace_insn_iterator *replay; |
1964 | struct btrace_thread_info *btinfo; | |
52834460 MM |
1965 | |
1966 | btinfo = &tp->btrace; | |
1967 | replay = NULL; | |
1968 | ||
1969 | /* We can't start replaying without trace. */ | |
1970 | if (btinfo->begin == NULL) | |
1971 | return NULL; | |
1972 | ||
52834460 MM |
1973 | /* GDB stores the current frame_id when stepping in order to detects steps |
1974 | into subroutines. | |
1975 | Since frames are computed differently when we're replaying, we need to | |
1976 | recompute those stored frames and fix them up so we can still detect | |
1977 | subroutines after we started replaying. */ | |
492d29ea | 1978 | TRY |
52834460 MM |
1979 | { |
1980 | struct frame_info *frame; | |
1981 | struct frame_id frame_id; | |
1982 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1983 | ||
1984 | /* The current frame without replaying - computed via normal unwind. */ | |
ec71cc2f | 1985 | frame = get_thread_current_frame (tp); |
52834460 MM |
1986 | frame_id = get_frame_id (frame); |
1987 | ||
1988 | /* Check if we need to update any stepping-related frame id's. */ | |
1989 | upd_step_frame_id = frame_id_eq (frame_id, | |
1990 | tp->control.step_frame_id); | |
1991 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1992 | tp->control.step_stack_frame_id); | |
1993 | ||
1994 | /* We start replaying at the end of the branch trace. This corresponds | |
1995 | to the current instruction. */ | |
8d749320 | 1996 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
1997 | btrace_insn_end (replay, btinfo); |
1998 | ||
31fd9caa MM |
1999 | /* Skip gaps at the end of the trace. */ |
2000 | while (btrace_insn_get (replay) == NULL) | |
2001 | { | |
2002 | unsigned int steps; | |
2003 | ||
2004 | steps = btrace_insn_prev (replay, 1); | |
2005 | if (steps == 0) | |
2006 | error (_("No trace.")); | |
2007 | } | |
2008 | ||
52834460 MM |
2009 | /* We're not replaying, yet. */ |
2010 | gdb_assert (btinfo->replay == NULL); | |
2011 | btinfo->replay = replay; | |
2012 | ||
2013 | /* Make sure we're not using any stale registers. */ | |
2014 | registers_changed_ptid (tp->ptid); | |
2015 | ||
2016 | /* The current frame with replaying - computed via btrace unwind. */ | |
ec71cc2f | 2017 | frame = get_thread_current_frame (tp); |
52834460 MM |
2018 | frame_id = get_frame_id (frame); |
2019 | ||
2020 | /* Replace stepping related frames where necessary. */ | |
2021 | if (upd_step_frame_id) | |
2022 | tp->control.step_frame_id = frame_id; | |
2023 | if (upd_step_stack_frame_id) | |
2024 | tp->control.step_stack_frame_id = frame_id; | |
2025 | } | |
492d29ea | 2026 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
2027 | { |
2028 | xfree (btinfo->replay); | |
2029 | btinfo->replay = NULL; | |
2030 | ||
2031 | registers_changed_ptid (tp->ptid); | |
2032 | ||
2033 | throw_exception (except); | |
2034 | } | |
492d29ea | 2035 | END_CATCH |
52834460 MM |
2036 | |
2037 | return replay; | |
2038 | } | |
2039 | ||
2040 | /* Stop replaying a thread. */ | |
2041 | ||
2042 | static void | |
2043 | record_btrace_stop_replaying (struct thread_info *tp) | |
2044 | { | |
2045 | struct btrace_thread_info *btinfo; | |
2046 | ||
2047 | btinfo = &tp->btrace; | |
2048 | ||
2049 | xfree (btinfo->replay); | |
2050 | btinfo->replay = NULL; | |
2051 | ||
2052 | /* Make sure we're not leaving any stale registers. */ | |
2053 | registers_changed_ptid (tp->ptid); | |
2054 | } | |
2055 | ||
e3cfc1c7 MM |
2056 | /* Stop replaying TP if it is at the end of its execution history. */ |
2057 | ||
2058 | static void | |
2059 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
2060 | { | |
2061 | struct btrace_insn_iterator *replay, end; | |
2062 | struct btrace_thread_info *btinfo; | |
2063 | ||
2064 | btinfo = &tp->btrace; | |
2065 | replay = btinfo->replay; | |
2066 | ||
2067 | if (replay == NULL) | |
2068 | return; | |
2069 | ||
2070 | btrace_insn_end (&end, btinfo); | |
2071 | ||
2072 | if (btrace_insn_cmp (replay, &end) == 0) | |
2073 | record_btrace_stop_replaying (tp); | |
2074 | } | |
2075 | ||
b2f4cfde MM |
2076 | /* The to_resume method of target record-btrace. */ |
2077 | ||
2078 | static void | |
2079 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2080 | enum gdb_signal signal) | |
2081 | { | |
0ca912df | 2082 | struct thread_info *tp; |
d2939ba2 | 2083 | enum btrace_thread_flag flag, cflag; |
52834460 | 2084 | |
987e68b1 MM |
2085 | DEBUG ("resume %s: %s%s", target_pid_to_str (ptid), |
2086 | execution_direction == EXEC_REVERSE ? "reverse-" : "", | |
2087 | step ? "step" : "cont"); | |
52834460 | 2088 | |
0ca912df MM |
2089 | /* Store the execution direction of the last resume. |
2090 | ||
2091 | If there is more than one to_resume call, we have to rely on infrun | |
2092 | to not change the execution direction in-between. */ | |
70ad5bff MM |
2093 | record_btrace_resume_exec_dir = execution_direction; |
2094 | ||
0ca912df | 2095 | /* As long as we're not replaying, just forward the request. |
52834460 | 2096 | |
0ca912df MM |
2097 | For non-stop targets this means that no thread is replaying. In order to |
2098 | make progress, we may need to explicitly move replaying threads to the end | |
2099 | of their execution history. */ | |
a52eab48 MM |
2100 | if ((execution_direction != EXEC_REVERSE) |
2101 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2102 | { |
e75fdfca | 2103 | ops = ops->beneath; |
04c4fe8c MM |
2104 | ops->to_resume (ops, ptid, step, signal); |
2105 | return; | |
b2f4cfde MM |
2106 | } |
2107 | ||
52834460 | 2108 | /* Compute the btrace thread flag for the requested move. */ |
d2939ba2 MM |
2109 | if (execution_direction == EXEC_REVERSE) |
2110 | { | |
2111 | flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP; | |
2112 | cflag = BTHR_RCONT; | |
2113 | } | |
52834460 | 2114 | else |
d2939ba2 MM |
2115 | { |
2116 | flag = step == 0 ? BTHR_CONT : BTHR_STEP; | |
2117 | cflag = BTHR_CONT; | |
2118 | } | |
52834460 | 2119 | |
52834460 | 2120 | /* We just indicate the resume intent here. The actual stepping happens in |
d2939ba2 MM |
2121 | record_btrace_wait below. |
2122 | ||
2123 | For all-stop targets, we only step INFERIOR_PTID and continue others. */ | |
2124 | if (!target_is_non_stop_p ()) | |
2125 | { | |
2126 | gdb_assert (ptid_match (inferior_ptid, ptid)); | |
2127 | ||
2128 | ALL_NON_EXITED_THREADS (tp) | |
2129 | if (ptid_match (tp->ptid, ptid)) | |
2130 | { | |
2131 | if (ptid_match (tp->ptid, inferior_ptid)) | |
2132 | record_btrace_resume_thread (tp, flag); | |
2133 | else | |
2134 | record_btrace_resume_thread (tp, cflag); | |
2135 | } | |
2136 | } | |
2137 | else | |
2138 | { | |
2139 | ALL_NON_EXITED_THREADS (tp) | |
2140 | if (ptid_match (tp->ptid, ptid)) | |
2141 | record_btrace_resume_thread (tp, flag); | |
2142 | } | |
70ad5bff MM |
2143 | |
2144 | /* Async support. */ | |
2145 | if (target_can_async_p ()) | |
2146 | { | |
6a3753b3 | 2147 | target_async (1); |
70ad5bff MM |
2148 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
2149 | } | |
52834460 MM |
2150 | } |
2151 | ||
987e68b1 MM |
2152 | /* Cancel resuming TP. */ |
2153 | ||
2154 | static void | |
2155 | record_btrace_cancel_resume (struct thread_info *tp) | |
2156 | { | |
2157 | enum btrace_thread_flag flags; | |
2158 | ||
2159 | flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP); | |
2160 | if (flags == 0) | |
2161 | return; | |
2162 | ||
43792cf0 PA |
2163 | DEBUG ("cancel resume thread %s (%s): %x (%s)", |
2164 | print_thread_id (tp), | |
987e68b1 MM |
2165 | target_pid_to_str (tp->ptid), flags, |
2166 | btrace_thread_flag_to_str (flags)); | |
2167 | ||
2168 | tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP); | |
e3cfc1c7 | 2169 | record_btrace_stop_replaying_at_end (tp); |
52834460 MM |
2170 | } |
2171 | ||
2172 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
2173 | ||
2174 | static struct target_waitstatus | |
2175 | btrace_step_no_history (void) | |
2176 | { | |
2177 | struct target_waitstatus status; | |
2178 | ||
2179 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
2180 | ||
2181 | return status; | |
2182 | } | |
2183 | ||
2184 | /* Return a target_waitstatus indicating that a step finished. */ | |
2185 | ||
2186 | static struct target_waitstatus | |
2187 | btrace_step_stopped (void) | |
2188 | { | |
2189 | struct target_waitstatus status; | |
2190 | ||
2191 | status.kind = TARGET_WAITKIND_STOPPED; | |
2192 | status.value.sig = GDB_SIGNAL_TRAP; | |
2193 | ||
2194 | return status; | |
2195 | } | |
2196 | ||
6e4879f0 MM |
2197 | /* Return a target_waitstatus indicating that a thread was stopped as |
2198 | requested. */ | |
2199 | ||
2200 | static struct target_waitstatus | |
2201 | btrace_step_stopped_on_request (void) | |
2202 | { | |
2203 | struct target_waitstatus status; | |
2204 | ||
2205 | status.kind = TARGET_WAITKIND_STOPPED; | |
2206 | status.value.sig = GDB_SIGNAL_0; | |
2207 | ||
2208 | return status; | |
2209 | } | |
2210 | ||
d825d248 MM |
2211 | /* Return a target_waitstatus indicating a spurious stop. */ |
2212 | ||
2213 | static struct target_waitstatus | |
2214 | btrace_step_spurious (void) | |
2215 | { | |
2216 | struct target_waitstatus status; | |
2217 | ||
2218 | status.kind = TARGET_WAITKIND_SPURIOUS; | |
2219 | ||
2220 | return status; | |
2221 | } | |
2222 | ||
e3cfc1c7 MM |
2223 | /* Return a target_waitstatus indicating that the thread was not resumed. */ |
2224 | ||
2225 | static struct target_waitstatus | |
2226 | btrace_step_no_resumed (void) | |
2227 | { | |
2228 | struct target_waitstatus status; | |
2229 | ||
2230 | status.kind = TARGET_WAITKIND_NO_RESUMED; | |
2231 | ||
2232 | return status; | |
2233 | } | |
2234 | ||
2235 | /* Return a target_waitstatus indicating that we should wait again. */ | |
2236 | ||
2237 | static struct target_waitstatus | |
2238 | btrace_step_again (void) | |
2239 | { | |
2240 | struct target_waitstatus status; | |
2241 | ||
2242 | status.kind = TARGET_WAITKIND_IGNORE; | |
2243 | ||
2244 | return status; | |
2245 | } | |
2246 | ||
52834460 MM |
2247 | /* Clear the record histories. */ |
2248 | ||
2249 | static void | |
2250 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
2251 | { | |
2252 | xfree (btinfo->insn_history); | |
2253 | xfree (btinfo->call_history); | |
2254 | ||
2255 | btinfo->insn_history = NULL; | |
2256 | btinfo->call_history = NULL; | |
2257 | } | |
2258 | ||
3c615f99 MM |
2259 | /* Check whether TP's current replay position is at a breakpoint. */ |
2260 | ||
2261 | static int | |
2262 | record_btrace_replay_at_breakpoint (struct thread_info *tp) | |
2263 | { | |
2264 | struct btrace_insn_iterator *replay; | |
2265 | struct btrace_thread_info *btinfo; | |
2266 | const struct btrace_insn *insn; | |
2267 | struct inferior *inf; | |
2268 | ||
2269 | btinfo = &tp->btrace; | |
2270 | replay = btinfo->replay; | |
2271 | ||
2272 | if (replay == NULL) | |
2273 | return 0; | |
2274 | ||
2275 | insn = btrace_insn_get (replay); | |
2276 | if (insn == NULL) | |
2277 | return 0; | |
2278 | ||
2279 | inf = find_inferior_ptid (tp->ptid); | |
2280 | if (inf == NULL) | |
2281 | return 0; | |
2282 | ||
2283 | return record_check_stopped_by_breakpoint (inf->aspace, insn->pc, | |
2284 | &btinfo->stop_reason); | |
2285 | } | |
2286 | ||
d825d248 | 2287 | /* Step one instruction in forward direction. */ |
52834460 MM |
2288 | |
2289 | static struct target_waitstatus | |
d825d248 | 2290 | record_btrace_single_step_forward (struct thread_info *tp) |
52834460 MM |
2291 | { |
2292 | struct btrace_insn_iterator *replay, end; | |
2293 | struct btrace_thread_info *btinfo; | |
52834460 | 2294 | |
d825d248 MM |
2295 | btinfo = &tp->btrace; |
2296 | replay = btinfo->replay; | |
2297 | ||
2298 | /* We're done if we're not replaying. */ | |
2299 | if (replay == NULL) | |
2300 | return btrace_step_no_history (); | |
2301 | ||
011c71b6 MM |
2302 | /* Check if we're stepping a breakpoint. */ |
2303 | if (record_btrace_replay_at_breakpoint (tp)) | |
2304 | return btrace_step_stopped (); | |
2305 | ||
d825d248 MM |
2306 | /* Skip gaps during replay. */ |
2307 | do | |
2308 | { | |
2309 | unsigned int steps; | |
2310 | ||
e3cfc1c7 MM |
2311 | /* We will bail out here if we continue stepping after reaching the end |
2312 | of the execution history. */ | |
d825d248 MM |
2313 | steps = btrace_insn_next (replay, 1); |
2314 | if (steps == 0) | |
e3cfc1c7 | 2315 | return btrace_step_no_history (); |
d825d248 MM |
2316 | } |
2317 | while (btrace_insn_get (replay) == NULL); | |
2318 | ||
2319 | /* Determine the end of the instruction trace. */ | |
2320 | btrace_insn_end (&end, btinfo); | |
2321 | ||
e3cfc1c7 MM |
2322 | /* The execution trace contains (and ends with) the current instruction. |
2323 | This instruction has not been executed, yet, so the trace really ends | |
2324 | one instruction earlier. */ | |
d825d248 | 2325 | if (btrace_insn_cmp (replay, &end) == 0) |
e3cfc1c7 | 2326 | return btrace_step_no_history (); |
d825d248 MM |
2327 | |
2328 | return btrace_step_spurious (); | |
2329 | } | |
2330 | ||
2331 | /* Step one instruction in backward direction. */ | |
2332 | ||
2333 | static struct target_waitstatus | |
2334 | record_btrace_single_step_backward (struct thread_info *tp) | |
2335 | { | |
2336 | struct btrace_insn_iterator *replay; | |
2337 | struct btrace_thread_info *btinfo; | |
e59fa00f | 2338 | |
52834460 MM |
2339 | btinfo = &tp->btrace; |
2340 | replay = btinfo->replay; | |
2341 | ||
d825d248 MM |
2342 | /* Start replaying if we're not already doing so. */ |
2343 | if (replay == NULL) | |
2344 | replay = record_btrace_start_replaying (tp); | |
2345 | ||
2346 | /* If we can't step any further, we reached the end of the history. | |
2347 | Skip gaps during replay. */ | |
2348 | do | |
2349 | { | |
2350 | unsigned int steps; | |
2351 | ||
2352 | steps = btrace_insn_prev (replay, 1); | |
2353 | if (steps == 0) | |
2354 | return btrace_step_no_history (); | |
2355 | } | |
2356 | while (btrace_insn_get (replay) == NULL); | |
2357 | ||
011c71b6 MM |
2358 | /* Check if we're stepping a breakpoint. |
2359 | ||
2360 | For reverse-stepping, this check is after the step. There is logic in | |
2361 | infrun.c that handles reverse-stepping separately. See, for example, | |
2362 | proceed and adjust_pc_after_break. | |
2363 | ||
2364 | This code assumes that for reverse-stepping, PC points to the last | |
2365 | de-executed instruction, whereas for forward-stepping PC points to the | |
2366 | next to-be-executed instruction. */ | |
2367 | if (record_btrace_replay_at_breakpoint (tp)) | |
2368 | return btrace_step_stopped (); | |
2369 | ||
d825d248 MM |
2370 | return btrace_step_spurious (); |
2371 | } | |
2372 | ||
2373 | /* Step a single thread. */ | |
2374 | ||
2375 | static struct target_waitstatus | |
2376 | record_btrace_step_thread (struct thread_info *tp) | |
2377 | { | |
2378 | struct btrace_thread_info *btinfo; | |
2379 | struct target_waitstatus status; | |
2380 | enum btrace_thread_flag flags; | |
2381 | ||
2382 | btinfo = &tp->btrace; | |
2383 | ||
6e4879f0 MM |
2384 | flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP); |
2385 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 | 2386 | |
43792cf0 | 2387 | DEBUG ("stepping thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 MM |
2388 | target_pid_to_str (tp->ptid), flags, |
2389 | btrace_thread_flag_to_str (flags)); | |
52834460 | 2390 | |
6e4879f0 MM |
2391 | /* We can't step without an execution history. */ |
2392 | if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp)) | |
2393 | return btrace_step_no_history (); | |
2394 | ||
52834460 MM |
2395 | switch (flags) |
2396 | { | |
2397 | default: | |
2398 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
2399 | ||
6e4879f0 MM |
2400 | case BTHR_STOP: |
2401 | return btrace_step_stopped_on_request (); | |
2402 | ||
52834460 | 2403 | case BTHR_STEP: |
d825d248 MM |
2404 | status = record_btrace_single_step_forward (tp); |
2405 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2406 | break; |
52834460 MM |
2407 | |
2408 | return btrace_step_stopped (); | |
2409 | ||
2410 | case BTHR_RSTEP: | |
d825d248 MM |
2411 | status = record_btrace_single_step_backward (tp); |
2412 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2413 | break; |
52834460 MM |
2414 | |
2415 | return btrace_step_stopped (); | |
2416 | ||
2417 | case BTHR_CONT: | |
e3cfc1c7 MM |
2418 | status = record_btrace_single_step_forward (tp); |
2419 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2420 | break; | |
52834460 | 2421 | |
e3cfc1c7 MM |
2422 | btinfo->flags |= flags; |
2423 | return btrace_step_again (); | |
52834460 MM |
2424 | |
2425 | case BTHR_RCONT: | |
e3cfc1c7 MM |
2426 | status = record_btrace_single_step_backward (tp); |
2427 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2428 | break; | |
52834460 | 2429 | |
e3cfc1c7 MM |
2430 | btinfo->flags |= flags; |
2431 | return btrace_step_again (); | |
2432 | } | |
d825d248 | 2433 | |
e3cfc1c7 MM |
2434 | /* We keep threads moving at the end of their execution history. The to_wait |
2435 | method will stop the thread for whom the event is reported. */ | |
2436 | if (status.kind == TARGET_WAITKIND_NO_HISTORY) | |
2437 | btinfo->flags |= flags; | |
52834460 | 2438 | |
e3cfc1c7 | 2439 | return status; |
b2f4cfde MM |
2440 | } |
2441 | ||
e3cfc1c7 MM |
2442 | /* A vector of threads. */ |
2443 | ||
2444 | typedef struct thread_info * tp_t; | |
2445 | DEF_VEC_P (tp_t); | |
2446 | ||
a6b5be76 MM |
2447 | /* Announce further events if necessary. */ |
2448 | ||
2449 | static void | |
2450 | record_btrace_maybe_mark_async_event (const VEC (tp_t) *moving, | |
2451 | const VEC (tp_t) *no_history) | |
2452 | { | |
2453 | int more_moving, more_no_history; | |
2454 | ||
2455 | more_moving = !VEC_empty (tp_t, moving); | |
2456 | more_no_history = !VEC_empty (tp_t, no_history); | |
2457 | ||
2458 | if (!more_moving && !more_no_history) | |
2459 | return; | |
2460 | ||
2461 | if (more_moving) | |
2462 | DEBUG ("movers pending"); | |
2463 | ||
2464 | if (more_no_history) | |
2465 | DEBUG ("no-history pending"); | |
2466 | ||
2467 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
2468 | } | |
2469 | ||
b2f4cfde MM |
2470 | /* The to_wait method of target record-btrace. */ |
2471 | ||
2472 | static ptid_t | |
2473 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2474 | struct target_waitstatus *status, int options) | |
2475 | { | |
e3cfc1c7 MM |
2476 | VEC (tp_t) *moving, *no_history; |
2477 | struct thread_info *tp, *eventing; | |
2478 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
52834460 MM |
2479 | |
2480 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2481 | ||
b2f4cfde | 2482 | /* As long as we're not replaying, just forward the request. */ |
a52eab48 MM |
2483 | if ((execution_direction != EXEC_REVERSE) |
2484 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2485 | { |
e75fdfca TT |
2486 | ops = ops->beneath; |
2487 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2488 | } |
2489 | ||
e3cfc1c7 MM |
2490 | moving = NULL; |
2491 | no_history = NULL; | |
2492 | ||
2493 | make_cleanup (VEC_cleanup (tp_t), &moving); | |
2494 | make_cleanup (VEC_cleanup (tp_t), &no_history); | |
2495 | ||
2496 | /* Keep a work list of moving threads. */ | |
2497 | ALL_NON_EXITED_THREADS (tp) | |
2498 | if (ptid_match (tp->ptid, ptid) | |
2499 | && ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)) | |
2500 | VEC_safe_push (tp_t, moving, tp); | |
2501 | ||
2502 | if (VEC_empty (tp_t, moving)) | |
52834460 | 2503 | { |
e3cfc1c7 | 2504 | *status = btrace_step_no_resumed (); |
52834460 | 2505 | |
e3cfc1c7 MM |
2506 | DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid), |
2507 | target_waitstatus_to_string (status)); | |
2508 | ||
2509 | do_cleanups (cleanups); | |
2510 | return null_ptid; | |
52834460 MM |
2511 | } |
2512 | ||
e3cfc1c7 MM |
2513 | /* Step moving threads one by one, one step each, until either one thread |
2514 | reports an event or we run out of threads to step. | |
2515 | ||
2516 | When stepping more than one thread, chances are that some threads reach | |
2517 | the end of their execution history earlier than others. If we reported | |
2518 | this immediately, all-stop on top of non-stop would stop all threads and | |
2519 | resume the same threads next time. And we would report the same thread | |
2520 | having reached the end of its execution history again. | |
2521 | ||
2522 | In the worst case, this would starve the other threads. But even if other | |
2523 | threads would be allowed to make progress, this would result in far too | |
2524 | many intermediate stops. | |
2525 | ||
2526 | We therefore delay the reporting of "no execution history" until we have | |
2527 | nothing else to report. By this time, all threads should have moved to | |
2528 | either the beginning or the end of their execution history. There will | |
2529 | be a single user-visible stop. */ | |
2530 | eventing = NULL; | |
2531 | while ((eventing == NULL) && !VEC_empty (tp_t, moving)) | |
2532 | { | |
2533 | unsigned int ix; | |
2534 | ||
2535 | ix = 0; | |
2536 | while ((eventing == NULL) && VEC_iterate (tp_t, moving, ix, tp)) | |
2537 | { | |
2538 | *status = record_btrace_step_thread (tp); | |
2539 | ||
2540 | switch (status->kind) | |
2541 | { | |
2542 | case TARGET_WAITKIND_IGNORE: | |
2543 | ix++; | |
2544 | break; | |
2545 | ||
2546 | case TARGET_WAITKIND_NO_HISTORY: | |
2547 | VEC_safe_push (tp_t, no_history, | |
2548 | VEC_ordered_remove (tp_t, moving, ix)); | |
2549 | break; | |
2550 | ||
2551 | default: | |
2552 | eventing = VEC_unordered_remove (tp_t, moving, ix); | |
2553 | break; | |
2554 | } | |
2555 | } | |
2556 | } | |
2557 | ||
2558 | if (eventing == NULL) | |
2559 | { | |
2560 | /* We started with at least one moving thread. This thread must have | |
2561 | either stopped or reached the end of its execution history. | |
2562 | ||
2563 | In the former case, EVENTING must not be NULL. | |
2564 | In the latter case, NO_HISTORY must not be empty. */ | |
2565 | gdb_assert (!VEC_empty (tp_t, no_history)); | |
2566 | ||
2567 | /* We kept threads moving at the end of their execution history. Stop | |
2568 | EVENTING now that we are going to report its stop. */ | |
2569 | eventing = VEC_unordered_remove (tp_t, no_history, 0); | |
2570 | eventing->btrace.flags &= ~BTHR_MOVE; | |
2571 | ||
2572 | *status = btrace_step_no_history (); | |
2573 | } | |
2574 | ||
2575 | gdb_assert (eventing != NULL); | |
2576 | ||
2577 | /* We kept threads replaying at the end of their execution history. Stop | |
2578 | replaying EVENTING now that we are going to report its stop. */ | |
2579 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2580 | |
2581 | /* Stop all other threads. */ | |
5953356c | 2582 | if (!target_is_non_stop_p ()) |
e3cfc1c7 MM |
2583 | ALL_NON_EXITED_THREADS (tp) |
2584 | record_btrace_cancel_resume (tp); | |
52834460 | 2585 | |
a6b5be76 MM |
2586 | /* In async mode, we need to announce further events. */ |
2587 | if (target_is_async_p ()) | |
2588 | record_btrace_maybe_mark_async_event (moving, no_history); | |
2589 | ||
52834460 | 2590 | /* Start record histories anew from the current position. */ |
e3cfc1c7 | 2591 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2592 | |
2593 | /* We moved the replay position but did not update registers. */ | |
e3cfc1c7 MM |
2594 | registers_changed_ptid (eventing->ptid); |
2595 | ||
43792cf0 PA |
2596 | DEBUG ("wait ended by thread %s (%s): %s", |
2597 | print_thread_id (eventing), | |
e3cfc1c7 MM |
2598 | target_pid_to_str (eventing->ptid), |
2599 | target_waitstatus_to_string (status)); | |
52834460 | 2600 | |
e3cfc1c7 MM |
2601 | do_cleanups (cleanups); |
2602 | return eventing->ptid; | |
52834460 MM |
2603 | } |
2604 | ||
6e4879f0 MM |
2605 | /* The to_stop method of target record-btrace. */ |
2606 | ||
2607 | static void | |
2608 | record_btrace_stop (struct target_ops *ops, ptid_t ptid) | |
2609 | { | |
2610 | DEBUG ("stop %s", target_pid_to_str (ptid)); | |
2611 | ||
2612 | /* As long as we're not replaying, just forward the request. */ | |
a52eab48 MM |
2613 | if ((execution_direction != EXEC_REVERSE) |
2614 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
6e4879f0 MM |
2615 | { |
2616 | ops = ops->beneath; | |
2617 | ops->to_stop (ops, ptid); | |
2618 | } | |
2619 | else | |
2620 | { | |
2621 | struct thread_info *tp; | |
2622 | ||
2623 | ALL_NON_EXITED_THREADS (tp) | |
2624 | if (ptid_match (tp->ptid, ptid)) | |
2625 | { | |
2626 | tp->btrace.flags &= ~BTHR_MOVE; | |
2627 | tp->btrace.flags |= BTHR_STOP; | |
2628 | } | |
2629 | } | |
2630 | } | |
2631 | ||
52834460 MM |
2632 | /* The to_can_execute_reverse method of target record-btrace. */ |
2633 | ||
2634 | static int | |
19db3e69 | 2635 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2636 | { |
2637 | return 1; | |
2638 | } | |
2639 | ||
9e8915c6 | 2640 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2641 | |
9e8915c6 PA |
2642 | static int |
2643 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2644 | { |
a52eab48 | 2645 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2646 | { |
2647 | struct thread_info *tp = inferior_thread (); | |
2648 | ||
2649 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2650 | } | |
2651 | ||
2652 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2653 | } | |
2654 | ||
2655 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2656 | record-btrace. */ | |
2657 | ||
2658 | static int | |
2659 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2660 | { | |
a52eab48 | 2661 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2662 | return 1; |
2663 | ||
2664 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2665 | } | |
2666 | ||
2667 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2668 | ||
2669 | static int | |
2670 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2671 | { | |
a52eab48 | 2672 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2673 | { |
2674 | struct thread_info *tp = inferior_thread (); | |
2675 | ||
2676 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2677 | } | |
2678 | ||
2679 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2680 | } | |
2681 | ||
2682 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2683 | record-btrace. */ | |
2684 | ||
2685 | static int | |
2686 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2687 | { | |
a52eab48 | 2688 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 | 2689 | return 1; |
52834460 | 2690 | |
9e8915c6 | 2691 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2692 | } |
2693 | ||
e8032dde | 2694 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2695 | |
2696 | static void | |
e8032dde | 2697 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2698 | { |
e8032dde | 2699 | /* We don't add or remove threads during replay. */ |
a52eab48 | 2700 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2701 | return; |
2702 | ||
2703 | /* Forward the request. */ | |
e75fdfca | 2704 | ops = ops->beneath; |
e8032dde | 2705 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2706 | } |
2707 | ||
2708 | /* The to_thread_alive method of target record-btrace. */ | |
2709 | ||
2710 | static int | |
2711 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2712 | { | |
2713 | /* We don't add or remove threads during replay. */ | |
a52eab48 | 2714 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2715 | return find_thread_ptid (ptid) != NULL; |
2716 | ||
2717 | /* Forward the request. */ | |
e75fdfca TT |
2718 | ops = ops->beneath; |
2719 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2720 | } |
2721 | ||
066ce621 MM |
2722 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2723 | is stopped. */ | |
2724 | ||
2725 | static void | |
2726 | record_btrace_set_replay (struct thread_info *tp, | |
2727 | const struct btrace_insn_iterator *it) | |
2728 | { | |
2729 | struct btrace_thread_info *btinfo; | |
2730 | ||
2731 | btinfo = &tp->btrace; | |
2732 | ||
2733 | if (it == NULL || it->function == NULL) | |
52834460 | 2734 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2735 | else |
2736 | { | |
2737 | if (btinfo->replay == NULL) | |
52834460 | 2738 | record_btrace_start_replaying (tp); |
066ce621 MM |
2739 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2740 | return; | |
2741 | ||
2742 | *btinfo->replay = *it; | |
52834460 | 2743 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2744 | } |
2745 | ||
52834460 MM |
2746 | /* Start anew from the new replay position. */ |
2747 | record_btrace_clear_histories (btinfo); | |
485668e5 MM |
2748 | |
2749 | stop_pc = regcache_read_pc (get_current_regcache ()); | |
2750 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
066ce621 MM |
2751 | } |
2752 | ||
2753 | /* The to_goto_record_begin method of target record-btrace. */ | |
2754 | ||
2755 | static void | |
08475817 | 2756 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2757 | { |
2758 | struct thread_info *tp; | |
2759 | struct btrace_insn_iterator begin; | |
2760 | ||
2761 | tp = require_btrace_thread (); | |
2762 | ||
2763 | btrace_insn_begin (&begin, &tp->btrace); | |
2764 | record_btrace_set_replay (tp, &begin); | |
066ce621 MM |
2765 | } |
2766 | ||
2767 | /* The to_goto_record_end method of target record-btrace. */ | |
2768 | ||
2769 | static void | |
307a1b91 | 2770 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2771 | { |
2772 | struct thread_info *tp; | |
2773 | ||
2774 | tp = require_btrace_thread (); | |
2775 | ||
2776 | record_btrace_set_replay (tp, NULL); | |
066ce621 MM |
2777 | } |
2778 | ||
2779 | /* The to_goto_record method of target record-btrace. */ | |
2780 | ||
2781 | static void | |
606183ac | 2782 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2783 | { |
2784 | struct thread_info *tp; | |
2785 | struct btrace_insn_iterator it; | |
2786 | unsigned int number; | |
2787 | int found; | |
2788 | ||
2789 | number = insn; | |
2790 | ||
2791 | /* Check for wrap-arounds. */ | |
2792 | if (number != insn) | |
2793 | error (_("Instruction number out of range.")); | |
2794 | ||
2795 | tp = require_btrace_thread (); | |
2796 | ||
2797 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2798 | if (found == 0) | |
2799 | error (_("No such instruction.")); | |
2800 | ||
2801 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2802 | } |
2803 | ||
797094dd MM |
2804 | /* The to_record_stop_replaying method of target record-btrace. */ |
2805 | ||
2806 | static void | |
2807 | record_btrace_stop_replaying_all (struct target_ops *self) | |
2808 | { | |
2809 | struct thread_info *tp; | |
2810 | ||
2811 | ALL_NON_EXITED_THREADS (tp) | |
2812 | record_btrace_stop_replaying (tp); | |
2813 | } | |
2814 | ||
70ad5bff MM |
2815 | /* The to_execution_direction target method. */ |
2816 | ||
2817 | static enum exec_direction_kind | |
2818 | record_btrace_execution_direction (struct target_ops *self) | |
2819 | { | |
2820 | return record_btrace_resume_exec_dir; | |
2821 | } | |
2822 | ||
aef92902 MM |
2823 | /* The to_prepare_to_generate_core target method. */ |
2824 | ||
2825 | static void | |
2826 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2827 | { | |
2828 | record_btrace_generating_corefile = 1; | |
2829 | } | |
2830 | ||
2831 | /* The to_done_generating_core target method. */ | |
2832 | ||
2833 | static void | |
2834 | record_btrace_done_generating_core (struct target_ops *self) | |
2835 | { | |
2836 | record_btrace_generating_corefile = 0; | |
2837 | } | |
2838 | ||
afedecd3 MM |
2839 | /* Initialize the record-btrace target ops. */ |
2840 | ||
2841 | static void | |
2842 | init_record_btrace_ops (void) | |
2843 | { | |
2844 | struct target_ops *ops; | |
2845 | ||
2846 | ops = &record_btrace_ops; | |
2847 | ops->to_shortname = "record-btrace"; | |
2848 | ops->to_longname = "Branch tracing target"; | |
2849 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2850 | ops->to_open = record_btrace_open; | |
2851 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2852 | ops->to_async = record_btrace_async; |
afedecd3 | 2853 | ops->to_detach = record_detach; |
c0272db5 | 2854 | ops->to_disconnect = record_btrace_disconnect; |
afedecd3 MM |
2855 | ops->to_mourn_inferior = record_mourn_inferior; |
2856 | ops->to_kill = record_kill; | |
afedecd3 MM |
2857 | ops->to_stop_recording = record_btrace_stop_recording; |
2858 | ops->to_info_record = record_btrace_info; | |
2859 | ops->to_insn_history = record_btrace_insn_history; | |
2860 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2861 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2862 | ops->to_call_history = record_btrace_call_history; | |
2863 | ops->to_call_history_from = record_btrace_call_history_from; | |
2864 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2865 | ops->to_record_is_replaying = record_btrace_is_replaying; |
7ff27e9b | 2866 | ops->to_record_will_replay = record_btrace_will_replay; |
797094dd | 2867 | ops->to_record_stop_replaying = record_btrace_stop_replaying_all; |
633785ff MM |
2868 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2869 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2870 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2871 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2872 | ops->to_store_registers = record_btrace_store_registers; | |
2873 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2874 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2875 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2876 | ops->to_resume = record_btrace_resume; |
2877 | ops->to_wait = record_btrace_wait; | |
6e4879f0 | 2878 | ops->to_stop = record_btrace_stop; |
e8032dde | 2879 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2880 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2881 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2882 | ops->to_goto_record_end = record_btrace_goto_end; | |
2883 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2884 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2885 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2886 | ops->to_supports_stopped_by_sw_breakpoint | |
2887 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2888 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2889 | ops->to_supports_stopped_by_hw_breakpoint | |
2890 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2891 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2892 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2893 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2894 | ops->to_stratum = record_stratum; |
2895 | ops->to_magic = OPS_MAGIC; | |
2896 | } | |
2897 | ||
f4abbc16 MM |
2898 | /* Start recording in BTS format. */ |
2899 | ||
2900 | static void | |
2901 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2902 | { | |
f4abbc16 MM |
2903 | if (args != NULL && *args != 0) |
2904 | error (_("Invalid argument.")); | |
2905 | ||
2906 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2907 | ||
492d29ea PA |
2908 | TRY |
2909 | { | |
2910 | execute_command ("target record-btrace", from_tty); | |
2911 | } | |
2912 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2913 | { |
2914 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2915 | throw_exception (exception); | |
2916 | } | |
492d29ea | 2917 | END_CATCH |
f4abbc16 MM |
2918 | } |
2919 | ||
bc504a31 | 2920 | /* Start recording in Intel Processor Trace format. */ |
afedecd3 MM |
2921 | |
2922 | static void | |
b20a6524 | 2923 | cmd_record_btrace_pt_start (char *args, int from_tty) |
afedecd3 MM |
2924 | { |
2925 | if (args != NULL && *args != 0) | |
2926 | error (_("Invalid argument.")); | |
2927 | ||
b20a6524 | 2928 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2929 | |
492d29ea PA |
2930 | TRY |
2931 | { | |
2932 | execute_command ("target record-btrace", from_tty); | |
2933 | } | |
2934 | CATCH (exception, RETURN_MASK_ALL) | |
2935 | { | |
2936 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2937 | throw_exception (exception); | |
2938 | } | |
2939 | END_CATCH | |
afedecd3 MM |
2940 | } |
2941 | ||
b20a6524 MM |
2942 | /* Alias for "target record". */ |
2943 | ||
2944 | static void | |
2945 | cmd_record_btrace_start (char *args, int from_tty) | |
2946 | { | |
2947 | if (args != NULL && *args != 0) | |
2948 | error (_("Invalid argument.")); | |
2949 | ||
2950 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2951 | ||
2952 | TRY | |
2953 | { | |
2954 | execute_command ("target record-btrace", from_tty); | |
2955 | } | |
2956 | CATCH (exception, RETURN_MASK_ALL) | |
2957 | { | |
2958 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2959 | ||
2960 | TRY | |
2961 | { | |
2962 | execute_command ("target record-btrace", from_tty); | |
2963 | } | |
2964 | CATCH (exception, RETURN_MASK_ALL) | |
2965 | { | |
2966 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2967 | throw_exception (exception); | |
2968 | } | |
2969 | END_CATCH | |
2970 | } | |
2971 | END_CATCH | |
2972 | } | |
2973 | ||
67b5c0c1 MM |
2974 | /* The "set record btrace" command. */ |
2975 | ||
2976 | static void | |
2977 | cmd_set_record_btrace (char *args, int from_tty) | |
2978 | { | |
2979 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2980 | } | |
2981 | ||
2982 | /* The "show record btrace" command. */ | |
2983 | ||
2984 | static void | |
2985 | cmd_show_record_btrace (char *args, int from_tty) | |
2986 | { | |
2987 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2988 | } | |
2989 | ||
2990 | /* The "show record btrace replay-memory-access" command. */ | |
2991 | ||
2992 | static void | |
2993 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2994 | struct cmd_list_element *c, const char *value) | |
2995 | { | |
2996 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2997 | replay_memory_access); | |
2998 | } | |
2999 | ||
d33501a5 MM |
3000 | /* The "set record btrace bts" command. */ |
3001 | ||
3002 | static void | |
3003 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
3004 | { | |
3005 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
b20a6524 | 3006 | "by an appropriate subcommand.\n")); |
d33501a5 MM |
3007 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", |
3008 | all_commands, gdb_stdout); | |
3009 | } | |
3010 | ||
3011 | /* The "show record btrace bts" command. */ | |
3012 | ||
3013 | static void | |
3014 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
3015 | { | |
3016 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
3017 | } | |
3018 | ||
b20a6524 MM |
3019 | /* The "set record btrace pt" command. */ |
3020 | ||
3021 | static void | |
3022 | cmd_set_record_btrace_pt (char *args, int from_tty) | |
3023 | { | |
3024 | printf_unfiltered (_("\"set record btrace pt\" must be followed " | |
3025 | "by an appropriate subcommand.\n")); | |
3026 | help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ", | |
3027 | all_commands, gdb_stdout); | |
3028 | } | |
3029 | ||
3030 | /* The "show record btrace pt" command. */ | |
3031 | ||
3032 | static void | |
3033 | cmd_show_record_btrace_pt (char *args, int from_tty) | |
3034 | { | |
3035 | cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, ""); | |
3036 | } | |
3037 | ||
3038 | /* The "record bts buffer-size" show value function. */ | |
3039 | ||
3040 | static void | |
3041 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
3042 | struct cmd_list_element *c, | |
3043 | const char *value) | |
3044 | { | |
3045 | fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"), | |
3046 | value); | |
3047 | } | |
3048 | ||
3049 | /* The "record pt buffer-size" show value function. */ | |
3050 | ||
3051 | static void | |
3052 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
3053 | struct cmd_list_element *c, | |
3054 | const char *value) | |
3055 | { | |
3056 | fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"), | |
3057 | value); | |
3058 | } | |
3059 | ||
afedecd3 MM |
3060 | void _initialize_record_btrace (void); |
3061 | ||
3062 | /* Initialize btrace commands. */ | |
3063 | ||
3064 | void | |
3065 | _initialize_record_btrace (void) | |
3066 | { | |
f4abbc16 MM |
3067 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
3068 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
3069 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
3070 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
3071 | ||
f4abbc16 MM |
3072 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
3073 | _("\ | |
3074 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
3075 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
3076 | This format may not be available on all processors."), | |
3077 | &record_btrace_cmdlist); | |
3078 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
3079 | ||
b20a6524 MM |
3080 | add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, |
3081 | _("\ | |
bc504a31 | 3082 | Start branch trace recording in Intel Processor Trace format.\n\n\ |
b20a6524 MM |
3083 | This format may not be available on all processors."), |
3084 | &record_btrace_cmdlist); | |
3085 | add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist); | |
3086 | ||
67b5c0c1 MM |
3087 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
3088 | _("Set record options"), &set_record_btrace_cmdlist, | |
3089 | "set record btrace ", 0, &set_record_cmdlist); | |
3090 | ||
3091 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
3092 | _("Show record options"), &show_record_btrace_cmdlist, | |
3093 | "show record btrace ", 0, &show_record_cmdlist); | |
3094 | ||
3095 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
3096 | replay_memory_access_types, &replay_memory_access, _("\ | |
3097 | Set what memory accesses are allowed during replay."), _("\ | |
3098 | Show what memory accesses are allowed during replay."), | |
3099 | _("Default is READ-ONLY.\n\n\ | |
3100 | The btrace record target does not trace data.\n\ | |
3101 | The memory therefore corresponds to the live target and not \ | |
3102 | to the current replay position.\n\n\ | |
3103 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
3104 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
3105 | replay."), | |
3106 | NULL, cmd_show_replay_memory_access, | |
3107 | &set_record_btrace_cmdlist, | |
3108 | &show_record_btrace_cmdlist); | |
3109 | ||
d33501a5 MM |
3110 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
3111 | _("Set record btrace bts options"), | |
3112 | &set_record_btrace_bts_cmdlist, | |
3113 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
3114 | ||
3115 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
3116 | _("Show record btrace bts options"), | |
3117 | &show_record_btrace_bts_cmdlist, | |
3118 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
3119 | ||
3120 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3121 | &record_btrace_conf.bts.size, | |
3122 | _("Set the record/replay bts buffer size."), | |
3123 | _("Show the record/replay bts buffer size."), _("\ | |
3124 | When starting recording request a trace buffer of this size. \ | |
3125 | The actual buffer size may differ from the requested size. \ | |
3126 | Use \"info record\" to see the actual buffer size.\n\n\ | |
3127 | Bigger buffers allow longer recording but also take more time to process \ | |
3128 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
3129 | The trace buffer size may not be changed while recording."), NULL, |
3130 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
3131 | &set_record_btrace_bts_cmdlist, |
3132 | &show_record_btrace_bts_cmdlist); | |
3133 | ||
b20a6524 MM |
3134 | add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt, |
3135 | _("Set record btrace pt options"), | |
3136 | &set_record_btrace_pt_cmdlist, | |
3137 | "set record btrace pt ", 0, &set_record_btrace_cmdlist); | |
3138 | ||
3139 | add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt, | |
3140 | _("Show record btrace pt options"), | |
3141 | &show_record_btrace_pt_cmdlist, | |
3142 | "show record btrace pt ", 0, &show_record_btrace_cmdlist); | |
3143 | ||
3144 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3145 | &record_btrace_conf.pt.size, | |
3146 | _("Set the record/replay pt buffer size."), | |
3147 | _("Show the record/replay pt buffer size."), _("\ | |
3148 | Bigger buffers allow longer recording but also take more time to process \ | |
3149 | the recorded execution.\n\ | |
3150 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
3151 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
3152 | &set_record_btrace_pt_cmdlist, | |
3153 | &show_record_btrace_pt_cmdlist); | |
3154 | ||
afedecd3 MM |
3155 | init_record_btrace_ops (); |
3156 | add_target (&record_btrace_ops); | |
0b722aec MM |
3157 | |
3158 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
3159 | xcalloc, xfree); | |
d33501a5 MM |
3160 | |
3161 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 3162 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 3163 | } |