Commit | Line | Data |
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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
61baf725 | 3 | Copyright (C) 2013-2017 Free Software Foundation, Inc. |
afedecd3 MM |
4 | |
5 | Contributed by Intel Corp. <markus.t.metzger@intel.com> | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "record.h" | |
c0272db5 | 24 | #include "record-btrace.h" |
afedecd3 MM |
25 | #include "gdbthread.h" |
26 | #include "target.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "disasm.h" | |
29 | #include "observer.h" | |
afedecd3 MM |
30 | #include "cli/cli-utils.h" |
31 | #include "source.h" | |
32 | #include "ui-out.h" | |
33 | #include "symtab.h" | |
34 | #include "filenames.h" | |
1f3ef581 | 35 | #include "regcache.h" |
cecac1ab | 36 | #include "frame-unwind.h" |
0b722aec | 37 | #include "hashtab.h" |
45741a9c | 38 | #include "infrun.h" |
70ad5bff MM |
39 | #include "event-loop.h" |
40 | #include "inf-loop.h" | |
e3cfc1c7 | 41 | #include "vec.h" |
325fac50 | 42 | #include <algorithm> |
afedecd3 MM |
43 | |
44 | /* The target_ops of record-btrace. */ | |
45 | static struct target_ops record_btrace_ops; | |
46 | ||
47 | /* A new thread observer enabling branch tracing for the new thread. */ | |
48 | static struct observer *record_btrace_thread_observer; | |
49 | ||
67b5c0c1 MM |
50 | /* Memory access types used in set/show record btrace replay-memory-access. */ |
51 | static const char replay_memory_access_read_only[] = "read-only"; | |
52 | static const char replay_memory_access_read_write[] = "read-write"; | |
53 | static const char *const replay_memory_access_types[] = | |
54 | { | |
55 | replay_memory_access_read_only, | |
56 | replay_memory_access_read_write, | |
57 | NULL | |
58 | }; | |
59 | ||
60 | /* The currently allowed replay memory access type. */ | |
61 | static const char *replay_memory_access = replay_memory_access_read_only; | |
62 | ||
63 | /* Command lists for "set/show record btrace". */ | |
64 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
65 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
633785ff | 66 | |
70ad5bff MM |
67 | /* The execution direction of the last resume we got. See record-full.c. */ |
68 | static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD; | |
69 | ||
70 | /* The async event handler for reverse/replay execution. */ | |
71 | static struct async_event_handler *record_btrace_async_inferior_event_handler; | |
72 | ||
aef92902 MM |
73 | /* A flag indicating that we are currently generating a core file. */ |
74 | static int record_btrace_generating_corefile; | |
75 | ||
f4abbc16 MM |
76 | /* The current branch trace configuration. */ |
77 | static struct btrace_config record_btrace_conf; | |
78 | ||
79 | /* Command list for "record btrace". */ | |
80 | static struct cmd_list_element *record_btrace_cmdlist; | |
81 | ||
d33501a5 MM |
82 | /* Command lists for "set/show record btrace bts". */ |
83 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
84 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
85 | ||
b20a6524 MM |
86 | /* Command lists for "set/show record btrace pt". */ |
87 | static struct cmd_list_element *set_record_btrace_pt_cmdlist; | |
88 | static struct cmd_list_element *show_record_btrace_pt_cmdlist; | |
89 | ||
afedecd3 MM |
90 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
91 | ambiguities when used in if statements. */ | |
92 | ||
93 | #define DEBUG(msg, args...) \ | |
94 | do \ | |
95 | { \ | |
96 | if (record_debug != 0) \ | |
97 | fprintf_unfiltered (gdb_stdlog, \ | |
98 | "[record-btrace] " msg "\n", ##args); \ | |
99 | } \ | |
100 | while (0) | |
101 | ||
102 | ||
103 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 104 | thread_info. |
afedecd3 MM |
105 | |
106 | Throws an error if there is no thread or no trace. This function never | |
107 | returns NULL. */ | |
108 | ||
066ce621 MM |
109 | static struct thread_info * |
110 | require_btrace_thread (void) | |
afedecd3 MM |
111 | { |
112 | struct thread_info *tp; | |
afedecd3 MM |
113 | |
114 | DEBUG ("require"); | |
115 | ||
116 | tp = find_thread_ptid (inferior_ptid); | |
117 | if (tp == NULL) | |
118 | error (_("No thread.")); | |
119 | ||
120 | btrace_fetch (tp); | |
121 | ||
6e07b1d2 | 122 | if (btrace_is_empty (tp)) |
afedecd3 MM |
123 | error (_("No trace.")); |
124 | ||
066ce621 MM |
125 | return tp; |
126 | } | |
127 | ||
128 | /* Update the branch trace for the current thread and return a pointer to its | |
129 | branch trace information struct. | |
130 | ||
131 | Throws an error if there is no thread or no trace. This function never | |
132 | returns NULL. */ | |
133 | ||
134 | static struct btrace_thread_info * | |
135 | require_btrace (void) | |
136 | { | |
137 | struct thread_info *tp; | |
138 | ||
139 | tp = require_btrace_thread (); | |
140 | ||
141 | return &tp->btrace; | |
afedecd3 MM |
142 | } |
143 | ||
144 | /* Enable branch tracing for one thread. Warn on errors. */ | |
145 | ||
146 | static void | |
147 | record_btrace_enable_warn (struct thread_info *tp) | |
148 | { | |
492d29ea PA |
149 | TRY |
150 | { | |
151 | btrace_enable (tp, &record_btrace_conf); | |
152 | } | |
153 | CATCH (error, RETURN_MASK_ERROR) | |
154 | { | |
155 | warning ("%s", error.message); | |
156 | } | |
157 | END_CATCH | |
afedecd3 MM |
158 | } |
159 | ||
160 | /* Callback function to disable branch tracing for one thread. */ | |
161 | ||
162 | static void | |
163 | record_btrace_disable_callback (void *arg) | |
164 | { | |
19ba03f4 | 165 | struct thread_info *tp = (struct thread_info *) arg; |
afedecd3 MM |
166 | |
167 | btrace_disable (tp); | |
168 | } | |
169 | ||
170 | /* Enable automatic tracing of new threads. */ | |
171 | ||
172 | static void | |
173 | record_btrace_auto_enable (void) | |
174 | { | |
175 | DEBUG ("attach thread observer"); | |
176 | ||
177 | record_btrace_thread_observer | |
178 | = observer_attach_new_thread (record_btrace_enable_warn); | |
179 | } | |
180 | ||
181 | /* Disable automatic tracing of new threads. */ | |
182 | ||
183 | static void | |
184 | record_btrace_auto_disable (void) | |
185 | { | |
186 | /* The observer may have been detached, already. */ | |
187 | if (record_btrace_thread_observer == NULL) | |
188 | return; | |
189 | ||
190 | DEBUG ("detach thread observer"); | |
191 | ||
192 | observer_detach_new_thread (record_btrace_thread_observer); | |
193 | record_btrace_thread_observer = NULL; | |
194 | } | |
195 | ||
70ad5bff MM |
196 | /* The record-btrace async event handler function. */ |
197 | ||
198 | static void | |
199 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
200 | { | |
201 | inferior_event_handler (INF_REG_EVENT, NULL); | |
202 | } | |
203 | ||
c0272db5 TW |
204 | /* See record-btrace.h. */ |
205 | ||
206 | void | |
207 | record_btrace_push_target (void) | |
208 | { | |
209 | const char *format; | |
210 | ||
211 | record_btrace_auto_enable (); | |
212 | ||
213 | push_target (&record_btrace_ops); | |
214 | ||
215 | record_btrace_async_inferior_event_handler | |
216 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
217 | NULL); | |
218 | record_btrace_generating_corefile = 0; | |
219 | ||
220 | format = btrace_format_short_string (record_btrace_conf.format); | |
221 | observer_notify_record_changed (current_inferior (), 1, "btrace", format); | |
222 | } | |
223 | ||
afedecd3 MM |
224 | /* The to_open method of target record-btrace. */ |
225 | ||
226 | static void | |
014f9477 | 227 | record_btrace_open (const char *args, int from_tty) |
afedecd3 MM |
228 | { |
229 | struct cleanup *disable_chain; | |
230 | struct thread_info *tp; | |
231 | ||
232 | DEBUG ("open"); | |
233 | ||
8213266a | 234 | record_preopen (); |
afedecd3 MM |
235 | |
236 | if (!target_has_execution) | |
237 | error (_("The program is not being run.")); | |
238 | ||
afedecd3 MM |
239 | gdb_assert (record_btrace_thread_observer == NULL); |
240 | ||
241 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 242 | ALL_NON_EXITED_THREADS (tp) |
5d5658a1 | 243 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num)) |
afedecd3 | 244 | { |
f4abbc16 | 245 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
246 | |
247 | make_cleanup (record_btrace_disable_callback, tp); | |
248 | } | |
249 | ||
c0272db5 | 250 | record_btrace_push_target (); |
afedecd3 MM |
251 | |
252 | discard_cleanups (disable_chain); | |
253 | } | |
254 | ||
255 | /* The to_stop_recording method of target record-btrace. */ | |
256 | ||
257 | static void | |
c6cd7c02 | 258 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
259 | { |
260 | struct thread_info *tp; | |
261 | ||
262 | DEBUG ("stop recording"); | |
263 | ||
264 | record_btrace_auto_disable (); | |
265 | ||
034f788c | 266 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
267 | if (tp->btrace.target != NULL) |
268 | btrace_disable (tp); | |
269 | } | |
270 | ||
c0272db5 TW |
271 | /* The to_disconnect method of target record-btrace. */ |
272 | ||
273 | static void | |
274 | record_btrace_disconnect (struct target_ops *self, const char *args, | |
275 | int from_tty) | |
276 | { | |
277 | struct target_ops *beneath = self->beneath; | |
278 | ||
279 | /* Do not stop recording, just clean up GDB side. */ | |
280 | unpush_target (self); | |
281 | ||
282 | /* Forward disconnect. */ | |
283 | beneath->to_disconnect (beneath, args, from_tty); | |
284 | } | |
285 | ||
afedecd3 MM |
286 | /* The to_close method of target record-btrace. */ |
287 | ||
288 | static void | |
de90e03d | 289 | record_btrace_close (struct target_ops *self) |
afedecd3 | 290 | { |
568e808b MM |
291 | struct thread_info *tp; |
292 | ||
70ad5bff MM |
293 | if (record_btrace_async_inferior_event_handler != NULL) |
294 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
295 | ||
99c819ee MM |
296 | /* Make sure automatic recording gets disabled even if we did not stop |
297 | recording before closing the record-btrace target. */ | |
298 | record_btrace_auto_disable (); | |
299 | ||
568e808b MM |
300 | /* We should have already stopped recording. |
301 | Tear down btrace in case we have not. */ | |
034f788c | 302 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 303 | btrace_teardown (tp); |
afedecd3 MM |
304 | } |
305 | ||
b7d2e916 PA |
306 | /* The to_async method of target record-btrace. */ |
307 | ||
308 | static void | |
6a3753b3 | 309 | record_btrace_async (struct target_ops *ops, int enable) |
b7d2e916 | 310 | { |
6a3753b3 | 311 | if (enable) |
b7d2e916 PA |
312 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
313 | else | |
314 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
315 | ||
6a3753b3 | 316 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
317 | } |
318 | ||
d33501a5 MM |
319 | /* Adjusts the size and returns a human readable size suffix. */ |
320 | ||
321 | static const char * | |
322 | record_btrace_adjust_size (unsigned int *size) | |
323 | { | |
324 | unsigned int sz; | |
325 | ||
326 | sz = *size; | |
327 | ||
328 | if ((sz & ((1u << 30) - 1)) == 0) | |
329 | { | |
330 | *size = sz >> 30; | |
331 | return "GB"; | |
332 | } | |
333 | else if ((sz & ((1u << 20) - 1)) == 0) | |
334 | { | |
335 | *size = sz >> 20; | |
336 | return "MB"; | |
337 | } | |
338 | else if ((sz & ((1u << 10) - 1)) == 0) | |
339 | { | |
340 | *size = sz >> 10; | |
341 | return "kB"; | |
342 | } | |
343 | else | |
344 | return ""; | |
345 | } | |
346 | ||
347 | /* Print a BTS configuration. */ | |
348 | ||
349 | static void | |
350 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
351 | { | |
352 | const char *suffix; | |
353 | unsigned int size; | |
354 | ||
355 | size = conf->size; | |
356 | if (size > 0) | |
357 | { | |
358 | suffix = record_btrace_adjust_size (&size); | |
359 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
360 | } | |
361 | } | |
362 | ||
bc504a31 | 363 | /* Print an Intel Processor Trace configuration. */ |
b20a6524 MM |
364 | |
365 | static void | |
366 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
367 | { | |
368 | const char *suffix; | |
369 | unsigned int size; | |
370 | ||
371 | size = conf->size; | |
372 | if (size > 0) | |
373 | { | |
374 | suffix = record_btrace_adjust_size (&size); | |
375 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
376 | } | |
377 | } | |
378 | ||
d33501a5 MM |
379 | /* Print a branch tracing configuration. */ |
380 | ||
381 | static void | |
382 | record_btrace_print_conf (const struct btrace_config *conf) | |
383 | { | |
384 | printf_unfiltered (_("Recording format: %s.\n"), | |
385 | btrace_format_string (conf->format)); | |
386 | ||
387 | switch (conf->format) | |
388 | { | |
389 | case BTRACE_FORMAT_NONE: | |
390 | return; | |
391 | ||
392 | case BTRACE_FORMAT_BTS: | |
393 | record_btrace_print_bts_conf (&conf->bts); | |
394 | return; | |
b20a6524 MM |
395 | |
396 | case BTRACE_FORMAT_PT: | |
397 | record_btrace_print_pt_conf (&conf->pt); | |
398 | return; | |
d33501a5 MM |
399 | } |
400 | ||
401 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
402 | } | |
403 | ||
afedecd3 MM |
404 | /* The to_info_record method of target record-btrace. */ |
405 | ||
406 | static void | |
630d6a4a | 407 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
408 | { |
409 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 410 | const struct btrace_config *conf; |
afedecd3 | 411 | struct thread_info *tp; |
31fd9caa | 412 | unsigned int insns, calls, gaps; |
afedecd3 MM |
413 | |
414 | DEBUG ("info"); | |
415 | ||
416 | tp = find_thread_ptid (inferior_ptid); | |
417 | if (tp == NULL) | |
418 | error (_("No thread.")); | |
419 | ||
f4abbc16 MM |
420 | btinfo = &tp->btrace; |
421 | ||
422 | conf = btrace_conf (btinfo); | |
423 | if (conf != NULL) | |
d33501a5 | 424 | record_btrace_print_conf (conf); |
f4abbc16 | 425 | |
afedecd3 MM |
426 | btrace_fetch (tp); |
427 | ||
23a7fe75 MM |
428 | insns = 0; |
429 | calls = 0; | |
31fd9caa | 430 | gaps = 0; |
23a7fe75 | 431 | |
6e07b1d2 | 432 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
433 | { |
434 | struct btrace_call_iterator call; | |
435 | struct btrace_insn_iterator insn; | |
436 | ||
437 | btrace_call_end (&call, btinfo); | |
438 | btrace_call_prev (&call, 1); | |
5de9129b | 439 | calls = btrace_call_number (&call); |
23a7fe75 MM |
440 | |
441 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 442 | |
5de9129b | 443 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
444 | if (insns != 0) |
445 | { | |
446 | /* The last instruction does not really belong to the trace. */ | |
447 | insns -= 1; | |
448 | } | |
449 | else | |
450 | { | |
451 | unsigned int steps; | |
452 | ||
453 | /* Skip gaps at the end. */ | |
454 | do | |
455 | { | |
456 | steps = btrace_insn_prev (&insn, 1); | |
457 | if (steps == 0) | |
458 | break; | |
459 | ||
460 | insns = btrace_insn_number (&insn); | |
461 | } | |
462 | while (insns == 0); | |
463 | } | |
464 | ||
465 | gaps = btinfo->ngaps; | |
23a7fe75 | 466 | } |
afedecd3 | 467 | |
31fd9caa | 468 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
43792cf0 PA |
469 | "for thread %s (%s).\n"), insns, calls, gaps, |
470 | print_thread_id (tp), target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
471 | |
472 | if (btrace_is_replaying (tp)) | |
473 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
474 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
475 | } |
476 | ||
31fd9caa MM |
477 | /* Print a decode error. */ |
478 | ||
479 | static void | |
480 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
481 | enum btrace_format format) | |
482 | { | |
483 | const char *errstr; | |
484 | int is_error; | |
485 | ||
486 | errstr = _("unknown"); | |
487 | is_error = 1; | |
488 | ||
489 | switch (format) | |
490 | { | |
491 | default: | |
492 | break; | |
493 | ||
494 | case BTRACE_FORMAT_BTS: | |
495 | switch (errcode) | |
496 | { | |
497 | default: | |
498 | break; | |
499 | ||
500 | case BDE_BTS_OVERFLOW: | |
501 | errstr = _("instruction overflow"); | |
502 | break; | |
503 | ||
504 | case BDE_BTS_INSN_SIZE: | |
505 | errstr = _("unknown instruction"); | |
506 | break; | |
507 | } | |
508 | break; | |
b20a6524 MM |
509 | |
510 | #if defined (HAVE_LIBIPT) | |
511 | case BTRACE_FORMAT_PT: | |
512 | switch (errcode) | |
513 | { | |
514 | case BDE_PT_USER_QUIT: | |
515 | is_error = 0; | |
516 | errstr = _("trace decode cancelled"); | |
517 | break; | |
518 | ||
519 | case BDE_PT_DISABLED: | |
520 | is_error = 0; | |
521 | errstr = _("disabled"); | |
522 | break; | |
523 | ||
524 | case BDE_PT_OVERFLOW: | |
525 | is_error = 0; | |
526 | errstr = _("overflow"); | |
527 | break; | |
528 | ||
529 | default: | |
530 | if (errcode < 0) | |
531 | errstr = pt_errstr (pt_errcode (errcode)); | |
532 | break; | |
533 | } | |
534 | break; | |
535 | #endif /* defined (HAVE_LIBIPT) */ | |
31fd9caa MM |
536 | } |
537 | ||
112e8700 | 538 | uiout->text (_("[")); |
31fd9caa MM |
539 | if (is_error) |
540 | { | |
112e8700 SM |
541 | uiout->text (_("decode error (")); |
542 | uiout->field_int ("errcode", errcode); | |
543 | uiout->text (_("): ")); | |
31fd9caa | 544 | } |
112e8700 SM |
545 | uiout->text (errstr); |
546 | uiout->text (_("]\n")); | |
31fd9caa MM |
547 | } |
548 | ||
afedecd3 MM |
549 | /* Print an unsigned int. */ |
550 | ||
551 | static void | |
552 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
553 | { | |
112e8700 | 554 | uiout->field_fmt (fld, "%u", val); |
afedecd3 MM |
555 | } |
556 | ||
f94cc897 MM |
557 | /* A range of source lines. */ |
558 | ||
559 | struct btrace_line_range | |
560 | { | |
561 | /* The symtab this line is from. */ | |
562 | struct symtab *symtab; | |
563 | ||
564 | /* The first line (inclusive). */ | |
565 | int begin; | |
566 | ||
567 | /* The last line (exclusive). */ | |
568 | int end; | |
569 | }; | |
570 | ||
571 | /* Construct a line range. */ | |
572 | ||
573 | static struct btrace_line_range | |
574 | btrace_mk_line_range (struct symtab *symtab, int begin, int end) | |
575 | { | |
576 | struct btrace_line_range range; | |
577 | ||
578 | range.symtab = symtab; | |
579 | range.begin = begin; | |
580 | range.end = end; | |
581 | ||
582 | return range; | |
583 | } | |
584 | ||
585 | /* Add a line to a line range. */ | |
586 | ||
587 | static struct btrace_line_range | |
588 | btrace_line_range_add (struct btrace_line_range range, int line) | |
589 | { | |
590 | if (range.end <= range.begin) | |
591 | { | |
592 | /* This is the first entry. */ | |
593 | range.begin = line; | |
594 | range.end = line + 1; | |
595 | } | |
596 | else if (line < range.begin) | |
597 | range.begin = line; | |
598 | else if (range.end < line) | |
599 | range.end = line; | |
600 | ||
601 | return range; | |
602 | } | |
603 | ||
604 | /* Return non-zero if RANGE is empty, zero otherwise. */ | |
605 | ||
606 | static int | |
607 | btrace_line_range_is_empty (struct btrace_line_range range) | |
608 | { | |
609 | return range.end <= range.begin; | |
610 | } | |
611 | ||
612 | /* Return non-zero if LHS contains RHS, zero otherwise. */ | |
613 | ||
614 | static int | |
615 | btrace_line_range_contains_range (struct btrace_line_range lhs, | |
616 | struct btrace_line_range rhs) | |
617 | { | |
618 | return ((lhs.symtab == rhs.symtab) | |
619 | && (lhs.begin <= rhs.begin) | |
620 | && (rhs.end <= lhs.end)); | |
621 | } | |
622 | ||
623 | /* Find the line range associated with PC. */ | |
624 | ||
625 | static struct btrace_line_range | |
626 | btrace_find_line_range (CORE_ADDR pc) | |
627 | { | |
628 | struct btrace_line_range range; | |
629 | struct linetable_entry *lines; | |
630 | struct linetable *ltable; | |
631 | struct symtab *symtab; | |
632 | int nlines, i; | |
633 | ||
634 | symtab = find_pc_line_symtab (pc); | |
635 | if (symtab == NULL) | |
636 | return btrace_mk_line_range (NULL, 0, 0); | |
637 | ||
638 | ltable = SYMTAB_LINETABLE (symtab); | |
639 | if (ltable == NULL) | |
640 | return btrace_mk_line_range (symtab, 0, 0); | |
641 | ||
642 | nlines = ltable->nitems; | |
643 | lines = ltable->item; | |
644 | if (nlines <= 0) | |
645 | return btrace_mk_line_range (symtab, 0, 0); | |
646 | ||
647 | range = btrace_mk_line_range (symtab, 0, 0); | |
648 | for (i = 0; i < nlines - 1; i++) | |
649 | { | |
650 | if ((lines[i].pc == pc) && (lines[i].line != 0)) | |
651 | range = btrace_line_range_add (range, lines[i].line); | |
652 | } | |
653 | ||
654 | return range; | |
655 | } | |
656 | ||
657 | /* Print source lines in LINES to UIOUT. | |
658 | ||
659 | UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
660 | instructions corresponding to that source line. When printing a new source | |
661 | line, we do the cleanups for the open chain and open a new cleanup chain for | |
662 | the new source line. If the source line range in LINES is not empty, this | |
663 | function will leave the cleanup chain for the last printed source line open | |
664 | so instructions can be added to it. */ | |
665 | ||
666 | static void | |
667 | btrace_print_lines (struct btrace_line_range lines, struct ui_out *uiout, | |
668 | struct cleanup **ui_item_chain, int flags) | |
669 | { | |
8d297bbf | 670 | print_source_lines_flags psl_flags; |
f94cc897 MM |
671 | int line; |
672 | ||
673 | psl_flags = 0; | |
674 | if (flags & DISASSEMBLY_FILENAME) | |
675 | psl_flags |= PRINT_SOURCE_LINES_FILENAME; | |
676 | ||
677 | for (line = lines.begin; line < lines.end; ++line) | |
678 | { | |
679 | if (*ui_item_chain != NULL) | |
680 | do_cleanups (*ui_item_chain); | |
681 | ||
682 | *ui_item_chain | |
683 | = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); | |
684 | ||
685 | print_source_lines (lines.symtab, line, line + 1, psl_flags); | |
686 | ||
687 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
688 | } | |
689 | } | |
690 | ||
afedecd3 MM |
691 | /* Disassemble a section of the recorded instruction trace. */ |
692 | ||
693 | static void | |
23a7fe75 | 694 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 695 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
696 | const struct btrace_insn_iterator *begin, |
697 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 | 698 | { |
f94cc897 MM |
699 | struct ui_file *stb; |
700 | struct cleanup *cleanups, *ui_item_chain; | |
701 | struct disassemble_info di; | |
afedecd3 | 702 | struct gdbarch *gdbarch; |
23a7fe75 | 703 | struct btrace_insn_iterator it; |
f94cc897 | 704 | struct btrace_line_range last_lines; |
afedecd3 | 705 | |
23a7fe75 MM |
706 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
707 | btrace_insn_number (end)); | |
afedecd3 | 708 | |
f94cc897 MM |
709 | flags |= DISASSEMBLY_SPECULATIVE; |
710 | ||
afedecd3 | 711 | gdbarch = target_gdbarch (); |
f94cc897 MM |
712 | stb = mem_fileopen (); |
713 | cleanups = make_cleanup_ui_file_delete (stb); | |
714 | di = gdb_disassemble_info (gdbarch, stb); | |
715 | last_lines = btrace_mk_line_range (NULL, 0, 0); | |
716 | ||
717 | make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); | |
718 | ||
719 | /* UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
720 | instructions corresponding to that line. */ | |
721 | ui_item_chain = NULL; | |
afedecd3 | 722 | |
23a7fe75 | 723 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 724 | { |
23a7fe75 MM |
725 | const struct btrace_insn *insn; |
726 | ||
727 | insn = btrace_insn_get (&it); | |
728 | ||
31fd9caa MM |
729 | /* A NULL instruction indicates a gap in the trace. */ |
730 | if (insn == NULL) | |
731 | { | |
732 | const struct btrace_config *conf; | |
733 | ||
734 | conf = btrace_conf (btinfo); | |
afedecd3 | 735 | |
31fd9caa MM |
736 | /* We have trace so we must have a configuration. */ |
737 | gdb_assert (conf != NULL); | |
738 | ||
739 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
740 | conf->format); | |
741 | } | |
742 | else | |
743 | { | |
f94cc897 | 744 | struct disasm_insn dinsn; |
da8c46d2 | 745 | |
f94cc897 | 746 | if ((flags & DISASSEMBLY_SOURCE) != 0) |
da8c46d2 | 747 | { |
f94cc897 MM |
748 | struct btrace_line_range lines; |
749 | ||
750 | lines = btrace_find_line_range (insn->pc); | |
751 | if (!btrace_line_range_is_empty (lines) | |
752 | && !btrace_line_range_contains_range (last_lines, lines)) | |
753 | { | |
754 | btrace_print_lines (lines, uiout, &ui_item_chain, flags); | |
755 | last_lines = lines; | |
756 | } | |
757 | else if (ui_item_chain == NULL) | |
758 | { | |
759 | ui_item_chain | |
760 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
761 | "src_and_asm_line"); | |
762 | /* No source information. */ | |
763 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
764 | } | |
765 | ||
766 | gdb_assert (ui_item_chain != NULL); | |
da8c46d2 | 767 | } |
da8c46d2 | 768 | |
f94cc897 MM |
769 | memset (&dinsn, 0, sizeof (dinsn)); |
770 | dinsn.number = btrace_insn_number (&it); | |
771 | dinsn.addr = insn->pc; | |
31fd9caa | 772 | |
da8c46d2 | 773 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) |
f94cc897 | 774 | dinsn.is_speculative = 1; |
da8c46d2 | 775 | |
f94cc897 | 776 | gdb_pretty_print_insn (gdbarch, uiout, &di, &dinsn, flags, stb); |
31fd9caa | 777 | } |
afedecd3 | 778 | } |
f94cc897 MM |
779 | |
780 | do_cleanups (cleanups); | |
afedecd3 MM |
781 | } |
782 | ||
783 | /* The to_insn_history method of target record-btrace. */ | |
784 | ||
785 | static void | |
7a6c5609 | 786 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
787 | { |
788 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
789 | struct btrace_insn_history *history; |
790 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
791 | struct cleanup *uiout_cleanup; |
792 | struct ui_out *uiout; | |
23a7fe75 | 793 | unsigned int context, covered; |
afedecd3 MM |
794 | |
795 | uiout = current_uiout; | |
796 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
797 | "insn history"); | |
afedecd3 | 798 | context = abs (size); |
afedecd3 MM |
799 | if (context == 0) |
800 | error (_("Bad record instruction-history-size.")); | |
801 | ||
23a7fe75 MM |
802 | btinfo = require_btrace (); |
803 | history = btinfo->insn_history; | |
804 | if (history == NULL) | |
afedecd3 | 805 | { |
07bbe694 | 806 | struct btrace_insn_iterator *replay; |
afedecd3 | 807 | |
23a7fe75 | 808 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 809 | |
07bbe694 MM |
810 | /* If we're replaying, we start at the replay position. Otherwise, we |
811 | start at the tail of the trace. */ | |
812 | replay = btinfo->replay; | |
813 | if (replay != NULL) | |
814 | begin = *replay; | |
815 | else | |
816 | btrace_insn_end (&begin, btinfo); | |
817 | ||
818 | /* We start from here and expand in the requested direction. Then we | |
819 | expand in the other direction, as well, to fill up any remaining | |
820 | context. */ | |
821 | end = begin; | |
822 | if (size < 0) | |
823 | { | |
824 | /* We want the current position covered, as well. */ | |
825 | covered = btrace_insn_next (&end, 1); | |
826 | covered += btrace_insn_prev (&begin, context - covered); | |
827 | covered += btrace_insn_next (&end, context - covered); | |
828 | } | |
829 | else | |
830 | { | |
831 | covered = btrace_insn_next (&end, context); | |
832 | covered += btrace_insn_prev (&begin, context - covered); | |
833 | } | |
afedecd3 MM |
834 | } |
835 | else | |
836 | { | |
23a7fe75 MM |
837 | begin = history->begin; |
838 | end = history->end; | |
afedecd3 | 839 | |
23a7fe75 MM |
840 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
841 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 842 | |
23a7fe75 MM |
843 | if (size < 0) |
844 | { | |
845 | end = begin; | |
846 | covered = btrace_insn_prev (&begin, context); | |
847 | } | |
848 | else | |
849 | { | |
850 | begin = end; | |
851 | covered = btrace_insn_next (&end, context); | |
852 | } | |
afedecd3 MM |
853 | } |
854 | ||
23a7fe75 | 855 | if (covered > 0) |
31fd9caa | 856 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
857 | else |
858 | { | |
859 | if (size < 0) | |
860 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
861 | else | |
862 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
863 | } | |
afedecd3 | 864 | |
23a7fe75 | 865 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
866 | do_cleanups (uiout_cleanup); |
867 | } | |
868 | ||
869 | /* The to_insn_history_range method of target record-btrace. */ | |
870 | ||
871 | static void | |
4e99c6b7 TT |
872 | record_btrace_insn_history_range (struct target_ops *self, |
873 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
874 | { |
875 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
876 | struct btrace_insn_history *history; |
877 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
878 | struct cleanup *uiout_cleanup; |
879 | struct ui_out *uiout; | |
23a7fe75 MM |
880 | unsigned int low, high; |
881 | int found; | |
afedecd3 MM |
882 | |
883 | uiout = current_uiout; | |
884 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
885 | "insn history"); | |
23a7fe75 MM |
886 | low = from; |
887 | high = to; | |
afedecd3 | 888 | |
23a7fe75 | 889 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
890 | |
891 | /* Check for wrap-arounds. */ | |
23a7fe75 | 892 | if (low != from || high != to) |
afedecd3 MM |
893 | error (_("Bad range.")); |
894 | ||
0688d04e | 895 | if (high < low) |
afedecd3 MM |
896 | error (_("Bad range.")); |
897 | ||
23a7fe75 | 898 | btinfo = require_btrace (); |
afedecd3 | 899 | |
23a7fe75 MM |
900 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
901 | if (found == 0) | |
902 | error (_("Range out of bounds.")); | |
afedecd3 | 903 | |
23a7fe75 MM |
904 | found = btrace_find_insn_by_number (&end, btinfo, high); |
905 | if (found == 0) | |
0688d04e MM |
906 | { |
907 | /* Silently truncate the range. */ | |
908 | btrace_insn_end (&end, btinfo); | |
909 | } | |
910 | else | |
911 | { | |
912 | /* We want both begin and end to be inclusive. */ | |
913 | btrace_insn_next (&end, 1); | |
914 | } | |
afedecd3 | 915 | |
31fd9caa | 916 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 917 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
918 | |
919 | do_cleanups (uiout_cleanup); | |
920 | } | |
921 | ||
922 | /* The to_insn_history_from method of target record-btrace. */ | |
923 | ||
924 | static void | |
9abc3ff3 TT |
925 | record_btrace_insn_history_from (struct target_ops *self, |
926 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
927 | { |
928 | ULONGEST begin, end, context; | |
929 | ||
930 | context = abs (size); | |
0688d04e MM |
931 | if (context == 0) |
932 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
933 | |
934 | if (size < 0) | |
935 | { | |
936 | end = from; | |
937 | ||
938 | if (from < context) | |
939 | begin = 0; | |
940 | else | |
0688d04e | 941 | begin = from - context + 1; |
afedecd3 MM |
942 | } |
943 | else | |
944 | { | |
945 | begin = from; | |
0688d04e | 946 | end = from + context - 1; |
afedecd3 MM |
947 | |
948 | /* Check for wrap-around. */ | |
949 | if (end < begin) | |
950 | end = ULONGEST_MAX; | |
951 | } | |
952 | ||
4e99c6b7 | 953 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
954 | } |
955 | ||
956 | /* Print the instruction number range for a function call history line. */ | |
957 | ||
958 | static void | |
23a7fe75 MM |
959 | btrace_call_history_insn_range (struct ui_out *uiout, |
960 | const struct btrace_function *bfun) | |
afedecd3 | 961 | { |
7acbe133 MM |
962 | unsigned int begin, end, size; |
963 | ||
964 | size = VEC_length (btrace_insn_s, bfun->insn); | |
965 | gdb_assert (size > 0); | |
afedecd3 | 966 | |
23a7fe75 | 967 | begin = bfun->insn_offset; |
7acbe133 | 968 | end = begin + size - 1; |
afedecd3 | 969 | |
23a7fe75 | 970 | ui_out_field_uint (uiout, "insn begin", begin); |
112e8700 | 971 | uiout->text (","); |
23a7fe75 | 972 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
973 | } |
974 | ||
ce0dfbea MM |
975 | /* Compute the lowest and highest source line for the instructions in BFUN |
976 | and return them in PBEGIN and PEND. | |
977 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
978 | result from inlining or macro expansion. */ | |
979 | ||
980 | static void | |
981 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
982 | int *pbegin, int *pend) | |
983 | { | |
984 | struct btrace_insn *insn; | |
985 | struct symtab *symtab; | |
986 | struct symbol *sym; | |
987 | unsigned int idx; | |
988 | int begin, end; | |
989 | ||
990 | begin = INT_MAX; | |
991 | end = INT_MIN; | |
992 | ||
993 | sym = bfun->sym; | |
994 | if (sym == NULL) | |
995 | goto out; | |
996 | ||
997 | symtab = symbol_symtab (sym); | |
998 | ||
999 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
1000 | { | |
1001 | struct symtab_and_line sal; | |
1002 | ||
1003 | sal = find_pc_line (insn->pc, 0); | |
1004 | if (sal.symtab != symtab || sal.line == 0) | |
1005 | continue; | |
1006 | ||
325fac50 PA |
1007 | begin = std::min (begin, sal.line); |
1008 | end = std::max (end, sal.line); | |
ce0dfbea MM |
1009 | } |
1010 | ||
1011 | out: | |
1012 | *pbegin = begin; | |
1013 | *pend = end; | |
1014 | } | |
1015 | ||
afedecd3 MM |
1016 | /* Print the source line information for a function call history line. */ |
1017 | ||
1018 | static void | |
23a7fe75 MM |
1019 | btrace_call_history_src_line (struct ui_out *uiout, |
1020 | const struct btrace_function *bfun) | |
afedecd3 MM |
1021 | { |
1022 | struct symbol *sym; | |
23a7fe75 | 1023 | int begin, end; |
afedecd3 MM |
1024 | |
1025 | sym = bfun->sym; | |
1026 | if (sym == NULL) | |
1027 | return; | |
1028 | ||
112e8700 | 1029 | uiout->field_string ("file", |
08be3fe3 | 1030 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 1031 | |
ce0dfbea | 1032 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 1033 | if (end < begin) |
afedecd3 MM |
1034 | return; |
1035 | ||
112e8700 SM |
1036 | uiout->text (":"); |
1037 | uiout->field_int ("min line", begin); | |
afedecd3 | 1038 | |
23a7fe75 | 1039 | if (end == begin) |
afedecd3 MM |
1040 | return; |
1041 | ||
112e8700 SM |
1042 | uiout->text (","); |
1043 | uiout->field_int ("max line", end); | |
afedecd3 MM |
1044 | } |
1045 | ||
0b722aec MM |
1046 | /* Get the name of a branch trace function. */ |
1047 | ||
1048 | static const char * | |
1049 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
1050 | { | |
1051 | struct minimal_symbol *msym; | |
1052 | struct symbol *sym; | |
1053 | ||
1054 | if (bfun == NULL) | |
1055 | return "??"; | |
1056 | ||
1057 | msym = bfun->msym; | |
1058 | sym = bfun->sym; | |
1059 | ||
1060 | if (sym != NULL) | |
1061 | return SYMBOL_PRINT_NAME (sym); | |
1062 | else if (msym != NULL) | |
efd66ac6 | 1063 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
1064 | else |
1065 | return "??"; | |
1066 | } | |
1067 | ||
afedecd3 MM |
1068 | /* Disassemble a section of the recorded function trace. */ |
1069 | ||
1070 | static void | |
23a7fe75 | 1071 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 1072 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
1073 | const struct btrace_call_iterator *begin, |
1074 | const struct btrace_call_iterator *end, | |
8d297bbf | 1075 | int int_flags) |
afedecd3 | 1076 | { |
23a7fe75 | 1077 | struct btrace_call_iterator it; |
8d297bbf | 1078 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 | 1079 | |
8d297bbf | 1080 | DEBUG ("ftrace (0x%x): [%u; %u)", int_flags, btrace_call_number (begin), |
23a7fe75 | 1081 | btrace_call_number (end)); |
afedecd3 | 1082 | |
23a7fe75 | 1083 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 1084 | { |
23a7fe75 MM |
1085 | const struct btrace_function *bfun; |
1086 | struct minimal_symbol *msym; | |
1087 | struct symbol *sym; | |
1088 | ||
1089 | bfun = btrace_call_get (&it); | |
23a7fe75 | 1090 | sym = bfun->sym; |
0b722aec | 1091 | msym = bfun->msym; |
23a7fe75 | 1092 | |
afedecd3 | 1093 | /* Print the function index. */ |
23a7fe75 | 1094 | ui_out_field_uint (uiout, "index", bfun->number); |
112e8700 | 1095 | uiout->text ("\t"); |
afedecd3 | 1096 | |
31fd9caa MM |
1097 | /* Indicate gaps in the trace. */ |
1098 | if (bfun->errcode != 0) | |
1099 | { | |
1100 | const struct btrace_config *conf; | |
1101 | ||
1102 | conf = btrace_conf (btinfo); | |
1103 | ||
1104 | /* We have trace so we must have a configuration. */ | |
1105 | gdb_assert (conf != NULL); | |
1106 | ||
1107 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
1108 | ||
1109 | continue; | |
1110 | } | |
1111 | ||
8710b709 MM |
1112 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
1113 | { | |
1114 | int level = bfun->level + btinfo->level, i; | |
1115 | ||
1116 | for (i = 0; i < level; ++i) | |
112e8700 | 1117 | uiout->text (" "); |
8710b709 MM |
1118 | } |
1119 | ||
1120 | if (sym != NULL) | |
112e8700 | 1121 | uiout->field_string ("function", SYMBOL_PRINT_NAME (sym)); |
8710b709 | 1122 | else if (msym != NULL) |
112e8700 SM |
1123 | uiout->field_string ("function", MSYMBOL_PRINT_NAME (msym)); |
1124 | else if (!uiout->is_mi_like_p ()) | |
1125 | uiout->field_string ("function", "??"); | |
8710b709 | 1126 | |
1e038f67 | 1127 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 1128 | { |
112e8700 | 1129 | uiout->text (_("\tinst ")); |
23a7fe75 | 1130 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
1131 | } |
1132 | ||
1e038f67 | 1133 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 1134 | { |
112e8700 | 1135 | uiout->text (_("\tat ")); |
23a7fe75 | 1136 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
1137 | } |
1138 | ||
112e8700 | 1139 | uiout->text ("\n"); |
afedecd3 MM |
1140 | } |
1141 | } | |
1142 | ||
1143 | /* The to_call_history method of target record-btrace. */ | |
1144 | ||
1145 | static void | |
8d297bbf | 1146 | record_btrace_call_history (struct target_ops *self, int size, int int_flags) |
afedecd3 MM |
1147 | { |
1148 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1149 | struct btrace_call_history *history; |
1150 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1151 | struct cleanup *uiout_cleanup; |
1152 | struct ui_out *uiout; | |
23a7fe75 | 1153 | unsigned int context, covered; |
8d297bbf | 1154 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1155 | |
1156 | uiout = current_uiout; | |
1157 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1158 | "insn history"); | |
afedecd3 | 1159 | context = abs (size); |
afedecd3 MM |
1160 | if (context == 0) |
1161 | error (_("Bad record function-call-history-size.")); | |
1162 | ||
23a7fe75 MM |
1163 | btinfo = require_btrace (); |
1164 | history = btinfo->call_history; | |
1165 | if (history == NULL) | |
afedecd3 | 1166 | { |
07bbe694 | 1167 | struct btrace_insn_iterator *replay; |
afedecd3 | 1168 | |
8d297bbf | 1169 | DEBUG ("call-history (0x%x): %d", int_flags, size); |
afedecd3 | 1170 | |
07bbe694 MM |
1171 | /* If we're replaying, we start at the replay position. Otherwise, we |
1172 | start at the tail of the trace. */ | |
1173 | replay = btinfo->replay; | |
1174 | if (replay != NULL) | |
1175 | { | |
1176 | begin.function = replay->function; | |
1177 | begin.btinfo = btinfo; | |
1178 | } | |
1179 | else | |
1180 | btrace_call_end (&begin, btinfo); | |
1181 | ||
1182 | /* We start from here and expand in the requested direction. Then we | |
1183 | expand in the other direction, as well, to fill up any remaining | |
1184 | context. */ | |
1185 | end = begin; | |
1186 | if (size < 0) | |
1187 | { | |
1188 | /* We want the current position covered, as well. */ | |
1189 | covered = btrace_call_next (&end, 1); | |
1190 | covered += btrace_call_prev (&begin, context - covered); | |
1191 | covered += btrace_call_next (&end, context - covered); | |
1192 | } | |
1193 | else | |
1194 | { | |
1195 | covered = btrace_call_next (&end, context); | |
1196 | covered += btrace_call_prev (&begin, context- covered); | |
1197 | } | |
afedecd3 MM |
1198 | } |
1199 | else | |
1200 | { | |
23a7fe75 MM |
1201 | begin = history->begin; |
1202 | end = history->end; | |
afedecd3 | 1203 | |
8d297bbf | 1204 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", int_flags, size, |
23a7fe75 | 1205 | btrace_call_number (&begin), btrace_call_number (&end)); |
afedecd3 | 1206 | |
23a7fe75 MM |
1207 | if (size < 0) |
1208 | { | |
1209 | end = begin; | |
1210 | covered = btrace_call_prev (&begin, context); | |
1211 | } | |
1212 | else | |
1213 | { | |
1214 | begin = end; | |
1215 | covered = btrace_call_next (&end, context); | |
1216 | } | |
afedecd3 MM |
1217 | } |
1218 | ||
23a7fe75 | 1219 | if (covered > 0) |
8710b709 | 1220 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1221 | else |
1222 | { | |
1223 | if (size < 0) | |
1224 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
1225 | else | |
1226 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
1227 | } | |
afedecd3 | 1228 | |
23a7fe75 | 1229 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1230 | do_cleanups (uiout_cleanup); |
1231 | } | |
1232 | ||
1233 | /* The to_call_history_range method of target record-btrace. */ | |
1234 | ||
1235 | static void | |
f0d960ea | 1236 | record_btrace_call_history_range (struct target_ops *self, |
8d297bbf PA |
1237 | ULONGEST from, ULONGEST to, |
1238 | int int_flags) | |
afedecd3 MM |
1239 | { |
1240 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1241 | struct btrace_call_history *history; |
1242 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1243 | struct cleanup *uiout_cleanup; |
1244 | struct ui_out *uiout; | |
23a7fe75 MM |
1245 | unsigned int low, high; |
1246 | int found; | |
8d297bbf | 1247 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1248 | |
1249 | uiout = current_uiout; | |
1250 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1251 | "func history"); | |
23a7fe75 MM |
1252 | low = from; |
1253 | high = to; | |
afedecd3 | 1254 | |
8d297bbf | 1255 | DEBUG ("call-history (0x%x): [%u; %u)", int_flags, low, high); |
afedecd3 MM |
1256 | |
1257 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1258 | if (low != from || high != to) |
afedecd3 MM |
1259 | error (_("Bad range.")); |
1260 | ||
0688d04e | 1261 | if (high < low) |
afedecd3 MM |
1262 | error (_("Bad range.")); |
1263 | ||
23a7fe75 | 1264 | btinfo = require_btrace (); |
afedecd3 | 1265 | |
23a7fe75 MM |
1266 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1267 | if (found == 0) | |
1268 | error (_("Range out of bounds.")); | |
afedecd3 | 1269 | |
23a7fe75 MM |
1270 | found = btrace_find_call_by_number (&end, btinfo, high); |
1271 | if (found == 0) | |
0688d04e MM |
1272 | { |
1273 | /* Silently truncate the range. */ | |
1274 | btrace_call_end (&end, btinfo); | |
1275 | } | |
1276 | else | |
1277 | { | |
1278 | /* We want both begin and end to be inclusive. */ | |
1279 | btrace_call_next (&end, 1); | |
1280 | } | |
afedecd3 | 1281 | |
8710b709 | 1282 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1283 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1284 | |
1285 | do_cleanups (uiout_cleanup); | |
1286 | } | |
1287 | ||
1288 | /* The to_call_history_from method of target record-btrace. */ | |
1289 | ||
1290 | static void | |
ec0aea04 | 1291 | record_btrace_call_history_from (struct target_ops *self, |
8d297bbf PA |
1292 | ULONGEST from, int size, |
1293 | int int_flags) | |
afedecd3 MM |
1294 | { |
1295 | ULONGEST begin, end, context; | |
8d297bbf | 1296 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1297 | |
1298 | context = abs (size); | |
0688d04e MM |
1299 | if (context == 0) |
1300 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1301 | |
1302 | if (size < 0) | |
1303 | { | |
1304 | end = from; | |
1305 | ||
1306 | if (from < context) | |
1307 | begin = 0; | |
1308 | else | |
0688d04e | 1309 | begin = from - context + 1; |
afedecd3 MM |
1310 | } |
1311 | else | |
1312 | { | |
1313 | begin = from; | |
0688d04e | 1314 | end = from + context - 1; |
afedecd3 MM |
1315 | |
1316 | /* Check for wrap-around. */ | |
1317 | if (end < begin) | |
1318 | end = ULONGEST_MAX; | |
1319 | } | |
1320 | ||
f0d960ea | 1321 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1322 | } |
1323 | ||
07bbe694 MM |
1324 | /* The to_record_is_replaying method of target record-btrace. */ |
1325 | ||
1326 | static int | |
a52eab48 | 1327 | record_btrace_is_replaying (struct target_ops *self, ptid_t ptid) |
07bbe694 MM |
1328 | { |
1329 | struct thread_info *tp; | |
1330 | ||
034f788c | 1331 | ALL_NON_EXITED_THREADS (tp) |
a52eab48 | 1332 | if (ptid_match (tp->ptid, ptid) && btrace_is_replaying (tp)) |
07bbe694 MM |
1333 | return 1; |
1334 | ||
1335 | return 0; | |
1336 | } | |
1337 | ||
7ff27e9b MM |
1338 | /* The to_record_will_replay method of target record-btrace. */ |
1339 | ||
1340 | static int | |
1341 | record_btrace_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1342 | { | |
1343 | return dir == EXEC_REVERSE || record_btrace_is_replaying (self, ptid); | |
1344 | } | |
1345 | ||
633785ff MM |
1346 | /* The to_xfer_partial method of target record-btrace. */ |
1347 | ||
9b409511 | 1348 | static enum target_xfer_status |
633785ff MM |
1349 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1350 | const char *annex, gdb_byte *readbuf, | |
1351 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1352 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1353 | { |
1354 | struct target_ops *t; | |
1355 | ||
1356 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1357 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1358 | && !record_btrace_generating_corefile |
4d10e986 | 1359 | && record_btrace_is_replaying (ops, inferior_ptid)) |
633785ff MM |
1360 | { |
1361 | switch (object) | |
1362 | { | |
1363 | case TARGET_OBJECT_MEMORY: | |
1364 | { | |
1365 | struct target_section *section; | |
1366 | ||
1367 | /* We do not allow writing memory in general. */ | |
1368 | if (writebuf != NULL) | |
9b409511 YQ |
1369 | { |
1370 | *xfered_len = len; | |
bc113b4e | 1371 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1372 | } |
633785ff MM |
1373 | |
1374 | /* We allow reading readonly memory. */ | |
1375 | section = target_section_by_addr (ops, offset); | |
1376 | if (section != NULL) | |
1377 | { | |
1378 | /* Check if the section we found is readonly. */ | |
1379 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1380 | section->the_bfd_section) | |
1381 | & SEC_READONLY) != 0) | |
1382 | { | |
1383 | /* Truncate the request to fit into this section. */ | |
325fac50 | 1384 | len = std::min (len, section->endaddr - offset); |
633785ff MM |
1385 | break; |
1386 | } | |
1387 | } | |
1388 | ||
9b409511 | 1389 | *xfered_len = len; |
bc113b4e | 1390 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1391 | } |
1392 | } | |
1393 | } | |
1394 | ||
1395 | /* Forward the request. */ | |
e75fdfca TT |
1396 | ops = ops->beneath; |
1397 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1398 | offset, len, xfered_len); | |
633785ff MM |
1399 | } |
1400 | ||
1401 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1402 | ||
1403 | static int | |
1404 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1405 | struct gdbarch *gdbarch, | |
1406 | struct bp_target_info *bp_tgt) | |
1407 | { | |
67b5c0c1 MM |
1408 | const char *old; |
1409 | int ret; | |
633785ff MM |
1410 | |
1411 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1412 | duration of this function. */ | |
67b5c0c1 MM |
1413 | old = replay_memory_access; |
1414 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1415 | |
1416 | ret = 0; | |
492d29ea PA |
1417 | TRY |
1418 | { | |
1419 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1420 | } | |
492d29ea PA |
1421 | CATCH (except, RETURN_MASK_ALL) |
1422 | { | |
6c63c96a | 1423 | replay_memory_access = old; |
492d29ea PA |
1424 | throw_exception (except); |
1425 | } | |
1426 | END_CATCH | |
6c63c96a | 1427 | replay_memory_access = old; |
633785ff MM |
1428 | |
1429 | return ret; | |
1430 | } | |
1431 | ||
1432 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1433 | ||
1434 | static int | |
1435 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1436 | struct gdbarch *gdbarch, | |
73971819 PA |
1437 | struct bp_target_info *bp_tgt, |
1438 | enum remove_bp_reason reason) | |
633785ff | 1439 | { |
67b5c0c1 MM |
1440 | const char *old; |
1441 | int ret; | |
633785ff MM |
1442 | |
1443 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1444 | duration of this function. */ | |
67b5c0c1 MM |
1445 | old = replay_memory_access; |
1446 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1447 | |
1448 | ret = 0; | |
492d29ea PA |
1449 | TRY |
1450 | { | |
73971819 PA |
1451 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt, |
1452 | reason); | |
492d29ea | 1453 | } |
492d29ea PA |
1454 | CATCH (except, RETURN_MASK_ALL) |
1455 | { | |
6c63c96a | 1456 | replay_memory_access = old; |
492d29ea PA |
1457 | throw_exception (except); |
1458 | } | |
1459 | END_CATCH | |
6c63c96a | 1460 | replay_memory_access = old; |
633785ff MM |
1461 | |
1462 | return ret; | |
1463 | } | |
1464 | ||
1f3ef581 MM |
1465 | /* The to_fetch_registers method of target record-btrace. */ |
1466 | ||
1467 | static void | |
1468 | record_btrace_fetch_registers (struct target_ops *ops, | |
1469 | struct regcache *regcache, int regno) | |
1470 | { | |
1471 | struct btrace_insn_iterator *replay; | |
1472 | struct thread_info *tp; | |
1473 | ||
1474 | tp = find_thread_ptid (inferior_ptid); | |
1475 | gdb_assert (tp != NULL); | |
1476 | ||
1477 | replay = tp->btrace.replay; | |
aef92902 | 1478 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1479 | { |
1480 | const struct btrace_insn *insn; | |
1481 | struct gdbarch *gdbarch; | |
1482 | int pcreg; | |
1483 | ||
1484 | gdbarch = get_regcache_arch (regcache); | |
1485 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1486 | if (pcreg < 0) | |
1487 | return; | |
1488 | ||
1489 | /* We can only provide the PC register. */ | |
1490 | if (regno >= 0 && regno != pcreg) | |
1491 | return; | |
1492 | ||
1493 | insn = btrace_insn_get (replay); | |
1494 | gdb_assert (insn != NULL); | |
1495 | ||
1496 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1497 | } | |
1498 | else | |
1499 | { | |
e75fdfca | 1500 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1501 | |
e75fdfca | 1502 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1503 | } |
1504 | } | |
1505 | ||
1506 | /* The to_store_registers method of target record-btrace. */ | |
1507 | ||
1508 | static void | |
1509 | record_btrace_store_registers (struct target_ops *ops, | |
1510 | struct regcache *regcache, int regno) | |
1511 | { | |
1512 | struct target_ops *t; | |
1513 | ||
a52eab48 | 1514 | if (!record_btrace_generating_corefile |
4d10e986 MM |
1515 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1516 | error (_("Cannot write registers while replaying.")); | |
1f3ef581 MM |
1517 | |
1518 | gdb_assert (may_write_registers != 0); | |
1519 | ||
e75fdfca TT |
1520 | t = ops->beneath; |
1521 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1522 | } |
1523 | ||
1524 | /* The to_prepare_to_store method of target record-btrace. */ | |
1525 | ||
1526 | static void | |
1527 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1528 | struct regcache *regcache) | |
1529 | { | |
1530 | struct target_ops *t; | |
1531 | ||
a52eab48 | 1532 | if (!record_btrace_generating_corefile |
4d10e986 | 1533 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1f3ef581 MM |
1534 | return; |
1535 | ||
e75fdfca TT |
1536 | t = ops->beneath; |
1537 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1538 | } |
1539 | ||
0b722aec MM |
1540 | /* The branch trace frame cache. */ |
1541 | ||
1542 | struct btrace_frame_cache | |
1543 | { | |
1544 | /* The thread. */ | |
1545 | struct thread_info *tp; | |
1546 | ||
1547 | /* The frame info. */ | |
1548 | struct frame_info *frame; | |
1549 | ||
1550 | /* The branch trace function segment. */ | |
1551 | const struct btrace_function *bfun; | |
1552 | }; | |
1553 | ||
1554 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1555 | ||
1556 | static htab_t bfcache; | |
1557 | ||
1558 | /* hash_f for htab_create_alloc of bfcache. */ | |
1559 | ||
1560 | static hashval_t | |
1561 | bfcache_hash (const void *arg) | |
1562 | { | |
19ba03f4 SM |
1563 | const struct btrace_frame_cache *cache |
1564 | = (const struct btrace_frame_cache *) arg; | |
0b722aec MM |
1565 | |
1566 | return htab_hash_pointer (cache->frame); | |
1567 | } | |
1568 | ||
1569 | /* eq_f for htab_create_alloc of bfcache. */ | |
1570 | ||
1571 | static int | |
1572 | bfcache_eq (const void *arg1, const void *arg2) | |
1573 | { | |
19ba03f4 SM |
1574 | const struct btrace_frame_cache *cache1 |
1575 | = (const struct btrace_frame_cache *) arg1; | |
1576 | const struct btrace_frame_cache *cache2 | |
1577 | = (const struct btrace_frame_cache *) arg2; | |
0b722aec MM |
1578 | |
1579 | return cache1->frame == cache2->frame; | |
1580 | } | |
1581 | ||
1582 | /* Create a new btrace frame cache. */ | |
1583 | ||
1584 | static struct btrace_frame_cache * | |
1585 | bfcache_new (struct frame_info *frame) | |
1586 | { | |
1587 | struct btrace_frame_cache *cache; | |
1588 | void **slot; | |
1589 | ||
1590 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1591 | cache->frame = frame; | |
1592 | ||
1593 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1594 | gdb_assert (*slot == NULL); | |
1595 | *slot = cache; | |
1596 | ||
1597 | return cache; | |
1598 | } | |
1599 | ||
1600 | /* Extract the branch trace function from a branch trace frame. */ | |
1601 | ||
1602 | static const struct btrace_function * | |
1603 | btrace_get_frame_function (struct frame_info *frame) | |
1604 | { | |
1605 | const struct btrace_frame_cache *cache; | |
1606 | const struct btrace_function *bfun; | |
1607 | struct btrace_frame_cache pattern; | |
1608 | void **slot; | |
1609 | ||
1610 | pattern.frame = frame; | |
1611 | ||
1612 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1613 | if (slot == NULL) | |
1614 | return NULL; | |
1615 | ||
19ba03f4 | 1616 | cache = (const struct btrace_frame_cache *) *slot; |
0b722aec MM |
1617 | return cache->bfun; |
1618 | } | |
1619 | ||
cecac1ab MM |
1620 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1621 | ||
1622 | static enum unwind_stop_reason | |
1623 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1624 | void **this_cache) | |
1625 | { | |
0b722aec MM |
1626 | const struct btrace_frame_cache *cache; |
1627 | const struct btrace_function *bfun; | |
1628 | ||
19ba03f4 | 1629 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1630 | bfun = cache->bfun; |
1631 | gdb_assert (bfun != NULL); | |
1632 | ||
1633 | if (bfun->up == NULL) | |
1634 | return UNWIND_UNAVAILABLE; | |
1635 | ||
1636 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1637 | } |
1638 | ||
1639 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1640 | ||
1641 | static void | |
1642 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1643 | struct frame_id *this_id) | |
1644 | { | |
0b722aec MM |
1645 | const struct btrace_frame_cache *cache; |
1646 | const struct btrace_function *bfun; | |
1647 | CORE_ADDR code, special; | |
1648 | ||
19ba03f4 | 1649 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1650 | |
1651 | bfun = cache->bfun; | |
1652 | gdb_assert (bfun != NULL); | |
1653 | ||
1654 | while (bfun->segment.prev != NULL) | |
1655 | bfun = bfun->segment.prev; | |
1656 | ||
1657 | code = get_frame_func (this_frame); | |
1658 | special = bfun->number; | |
1659 | ||
1660 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1661 | ||
1662 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1663 | btrace_get_bfun_name (cache->bfun), | |
1664 | core_addr_to_string_nz (this_id->code_addr), | |
1665 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1666 | } |
1667 | ||
1668 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1669 | ||
1670 | static struct value * | |
1671 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1672 | void **this_cache, | |
1673 | int regnum) | |
1674 | { | |
0b722aec MM |
1675 | const struct btrace_frame_cache *cache; |
1676 | const struct btrace_function *bfun, *caller; | |
1677 | const struct btrace_insn *insn; | |
1678 | struct gdbarch *gdbarch; | |
1679 | CORE_ADDR pc; | |
1680 | int pcreg; | |
1681 | ||
1682 | gdbarch = get_frame_arch (this_frame); | |
1683 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1684 | if (pcreg < 0 || regnum != pcreg) | |
1685 | throw_error (NOT_AVAILABLE_ERROR, | |
1686 | _("Registers are not available in btrace record history")); | |
1687 | ||
19ba03f4 | 1688 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1689 | bfun = cache->bfun; |
1690 | gdb_assert (bfun != NULL); | |
1691 | ||
1692 | caller = bfun->up; | |
1693 | if (caller == NULL) | |
1694 | throw_error (NOT_AVAILABLE_ERROR, | |
1695 | _("No caller in btrace record history")); | |
1696 | ||
1697 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1698 | { | |
1699 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1700 | pc = insn->pc; | |
1701 | } | |
1702 | else | |
1703 | { | |
1704 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1705 | pc = insn->pc; | |
1706 | ||
1707 | pc += gdb_insn_length (gdbarch, pc); | |
1708 | } | |
1709 | ||
1710 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1711 | btrace_get_bfun_name (bfun), bfun->level, | |
1712 | core_addr_to_string_nz (pc)); | |
1713 | ||
1714 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1715 | } |
1716 | ||
1717 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1718 | ||
1719 | static int | |
1720 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1721 | struct frame_info *this_frame, | |
1722 | void **this_cache) | |
1723 | { | |
0b722aec MM |
1724 | const struct btrace_function *bfun; |
1725 | struct btrace_frame_cache *cache; | |
cecac1ab | 1726 | struct thread_info *tp; |
0b722aec | 1727 | struct frame_info *next; |
cecac1ab MM |
1728 | |
1729 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1730 | tp = find_thread_ptid (inferior_ptid); | |
1731 | gdb_assert (tp != NULL); | |
1732 | ||
0b722aec MM |
1733 | bfun = NULL; |
1734 | next = get_next_frame (this_frame); | |
1735 | if (next == NULL) | |
1736 | { | |
1737 | const struct btrace_insn_iterator *replay; | |
1738 | ||
1739 | replay = tp->btrace.replay; | |
1740 | if (replay != NULL) | |
1741 | bfun = replay->function; | |
1742 | } | |
1743 | else | |
1744 | { | |
1745 | const struct btrace_function *callee; | |
1746 | ||
1747 | callee = btrace_get_frame_function (next); | |
1748 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1749 | bfun = callee->up; | |
1750 | } | |
1751 | ||
1752 | if (bfun == NULL) | |
1753 | return 0; | |
1754 | ||
1755 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1756 | btrace_get_bfun_name (bfun), bfun->level); | |
1757 | ||
1758 | /* This is our frame. Initialize the frame cache. */ | |
1759 | cache = bfcache_new (this_frame); | |
1760 | cache->tp = tp; | |
1761 | cache->bfun = bfun; | |
1762 | ||
1763 | *this_cache = cache; | |
1764 | return 1; | |
1765 | } | |
1766 | ||
1767 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1768 | ||
1769 | static int | |
1770 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1771 | struct frame_info *this_frame, | |
1772 | void **this_cache) | |
1773 | { | |
1774 | const struct btrace_function *bfun, *callee; | |
1775 | struct btrace_frame_cache *cache; | |
1776 | struct frame_info *next; | |
1777 | ||
1778 | next = get_next_frame (this_frame); | |
1779 | if (next == NULL) | |
1780 | return 0; | |
1781 | ||
1782 | callee = btrace_get_frame_function (next); | |
1783 | if (callee == NULL) | |
1784 | return 0; | |
1785 | ||
1786 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1787 | return 0; | |
1788 | ||
1789 | bfun = callee->up; | |
1790 | if (bfun == NULL) | |
1791 | return 0; | |
1792 | ||
1793 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1794 | btrace_get_bfun_name (bfun), bfun->level); | |
1795 | ||
1796 | /* This is our frame. Initialize the frame cache. */ | |
1797 | cache = bfcache_new (this_frame); | |
1798 | cache->tp = find_thread_ptid (inferior_ptid); | |
1799 | cache->bfun = bfun; | |
1800 | ||
1801 | *this_cache = cache; | |
1802 | return 1; | |
1803 | } | |
1804 | ||
1805 | static void | |
1806 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1807 | { | |
1808 | struct btrace_frame_cache *cache; | |
1809 | void **slot; | |
1810 | ||
19ba03f4 | 1811 | cache = (struct btrace_frame_cache *) this_cache; |
0b722aec MM |
1812 | |
1813 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1814 | gdb_assert (slot != NULL); | |
1815 | ||
1816 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1817 | } |
1818 | ||
1819 | /* btrace recording does not store previous memory content, neither the stack | |
1820 | frames content. Any unwinding would return errorneous results as the stack | |
1821 | contents no longer matches the changed PC value restored from history. | |
1822 | Therefore this unwinder reports any possibly unwound registers as | |
1823 | <unavailable>. */ | |
1824 | ||
0b722aec | 1825 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1826 | { |
1827 | NORMAL_FRAME, | |
1828 | record_btrace_frame_unwind_stop_reason, | |
1829 | record_btrace_frame_this_id, | |
1830 | record_btrace_frame_prev_register, | |
1831 | NULL, | |
0b722aec MM |
1832 | record_btrace_frame_sniffer, |
1833 | record_btrace_frame_dealloc_cache | |
1834 | }; | |
1835 | ||
1836 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1837 | { | |
1838 | TAILCALL_FRAME, | |
1839 | record_btrace_frame_unwind_stop_reason, | |
1840 | record_btrace_frame_this_id, | |
1841 | record_btrace_frame_prev_register, | |
1842 | NULL, | |
1843 | record_btrace_tailcall_frame_sniffer, | |
1844 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1845 | }; |
b2f4cfde | 1846 | |
ac01945b TT |
1847 | /* Implement the to_get_unwinder method. */ |
1848 | ||
1849 | static const struct frame_unwind * | |
1850 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1851 | { | |
1852 | return &record_btrace_frame_unwind; | |
1853 | } | |
1854 | ||
1855 | /* Implement the to_get_tailcall_unwinder method. */ | |
1856 | ||
1857 | static const struct frame_unwind * | |
1858 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1859 | { | |
1860 | return &record_btrace_tailcall_frame_unwind; | |
1861 | } | |
1862 | ||
987e68b1 MM |
1863 | /* Return a human-readable string for FLAG. */ |
1864 | ||
1865 | static const char * | |
1866 | btrace_thread_flag_to_str (enum btrace_thread_flag flag) | |
1867 | { | |
1868 | switch (flag) | |
1869 | { | |
1870 | case BTHR_STEP: | |
1871 | return "step"; | |
1872 | ||
1873 | case BTHR_RSTEP: | |
1874 | return "reverse-step"; | |
1875 | ||
1876 | case BTHR_CONT: | |
1877 | return "cont"; | |
1878 | ||
1879 | case BTHR_RCONT: | |
1880 | return "reverse-cont"; | |
1881 | ||
1882 | case BTHR_STOP: | |
1883 | return "stop"; | |
1884 | } | |
1885 | ||
1886 | return "<invalid>"; | |
1887 | } | |
1888 | ||
52834460 MM |
1889 | /* Indicate that TP should be resumed according to FLAG. */ |
1890 | ||
1891 | static void | |
1892 | record_btrace_resume_thread (struct thread_info *tp, | |
1893 | enum btrace_thread_flag flag) | |
1894 | { | |
1895 | struct btrace_thread_info *btinfo; | |
1896 | ||
43792cf0 | 1897 | DEBUG ("resuming thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 | 1898 | target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag)); |
52834460 MM |
1899 | |
1900 | btinfo = &tp->btrace; | |
1901 | ||
52834460 MM |
1902 | /* Fetch the latest branch trace. */ |
1903 | btrace_fetch (tp); | |
1904 | ||
0ca912df MM |
1905 | /* A resume request overwrites a preceding resume or stop request. */ |
1906 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1907 | btinfo->flags |= flag; |
1908 | } | |
1909 | ||
ec71cc2f MM |
1910 | /* Get the current frame for TP. */ |
1911 | ||
1912 | static struct frame_info * | |
1913 | get_thread_current_frame (struct thread_info *tp) | |
1914 | { | |
1915 | struct frame_info *frame; | |
1916 | ptid_t old_inferior_ptid; | |
1917 | int executing; | |
1918 | ||
1919 | /* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */ | |
1920 | old_inferior_ptid = inferior_ptid; | |
1921 | inferior_ptid = tp->ptid; | |
1922 | ||
1923 | /* Clear the executing flag to allow changes to the current frame. | |
1924 | We are not actually running, yet. We just started a reverse execution | |
1925 | command or a record goto command. | |
1926 | For the latter, EXECUTING is false and this has no effect. | |
1927 | For the former, EXECUTING is true and we're in to_wait, about to | |
1928 | move the thread. Since we need to recompute the stack, we temporarily | |
1929 | set EXECUTING to flase. */ | |
1930 | executing = is_executing (inferior_ptid); | |
1931 | set_executing (inferior_ptid, 0); | |
1932 | ||
1933 | frame = NULL; | |
1934 | TRY | |
1935 | { | |
1936 | frame = get_current_frame (); | |
1937 | } | |
1938 | CATCH (except, RETURN_MASK_ALL) | |
1939 | { | |
1940 | /* Restore the previous execution state. */ | |
1941 | set_executing (inferior_ptid, executing); | |
1942 | ||
1943 | /* Restore the previous inferior_ptid. */ | |
1944 | inferior_ptid = old_inferior_ptid; | |
1945 | ||
1946 | throw_exception (except); | |
1947 | } | |
1948 | END_CATCH | |
1949 | ||
1950 | /* Restore the previous execution state. */ | |
1951 | set_executing (inferior_ptid, executing); | |
1952 | ||
1953 | /* Restore the previous inferior_ptid. */ | |
1954 | inferior_ptid = old_inferior_ptid; | |
1955 | ||
1956 | return frame; | |
1957 | } | |
1958 | ||
52834460 MM |
1959 | /* Start replaying a thread. */ |
1960 | ||
1961 | static struct btrace_insn_iterator * | |
1962 | record_btrace_start_replaying (struct thread_info *tp) | |
1963 | { | |
52834460 MM |
1964 | struct btrace_insn_iterator *replay; |
1965 | struct btrace_thread_info *btinfo; | |
52834460 MM |
1966 | |
1967 | btinfo = &tp->btrace; | |
1968 | replay = NULL; | |
1969 | ||
1970 | /* We can't start replaying without trace. */ | |
1971 | if (btinfo->begin == NULL) | |
1972 | return NULL; | |
1973 | ||
52834460 MM |
1974 | /* GDB stores the current frame_id when stepping in order to detects steps |
1975 | into subroutines. | |
1976 | Since frames are computed differently when we're replaying, we need to | |
1977 | recompute those stored frames and fix them up so we can still detect | |
1978 | subroutines after we started replaying. */ | |
492d29ea | 1979 | TRY |
52834460 MM |
1980 | { |
1981 | struct frame_info *frame; | |
1982 | struct frame_id frame_id; | |
1983 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1984 | ||
1985 | /* The current frame without replaying - computed via normal unwind. */ | |
ec71cc2f | 1986 | frame = get_thread_current_frame (tp); |
52834460 MM |
1987 | frame_id = get_frame_id (frame); |
1988 | ||
1989 | /* Check if we need to update any stepping-related frame id's. */ | |
1990 | upd_step_frame_id = frame_id_eq (frame_id, | |
1991 | tp->control.step_frame_id); | |
1992 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1993 | tp->control.step_stack_frame_id); | |
1994 | ||
1995 | /* We start replaying at the end of the branch trace. This corresponds | |
1996 | to the current instruction. */ | |
8d749320 | 1997 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
1998 | btrace_insn_end (replay, btinfo); |
1999 | ||
31fd9caa MM |
2000 | /* Skip gaps at the end of the trace. */ |
2001 | while (btrace_insn_get (replay) == NULL) | |
2002 | { | |
2003 | unsigned int steps; | |
2004 | ||
2005 | steps = btrace_insn_prev (replay, 1); | |
2006 | if (steps == 0) | |
2007 | error (_("No trace.")); | |
2008 | } | |
2009 | ||
52834460 MM |
2010 | /* We're not replaying, yet. */ |
2011 | gdb_assert (btinfo->replay == NULL); | |
2012 | btinfo->replay = replay; | |
2013 | ||
2014 | /* Make sure we're not using any stale registers. */ | |
2015 | registers_changed_ptid (tp->ptid); | |
2016 | ||
2017 | /* The current frame with replaying - computed via btrace unwind. */ | |
ec71cc2f | 2018 | frame = get_thread_current_frame (tp); |
52834460 MM |
2019 | frame_id = get_frame_id (frame); |
2020 | ||
2021 | /* Replace stepping related frames where necessary. */ | |
2022 | if (upd_step_frame_id) | |
2023 | tp->control.step_frame_id = frame_id; | |
2024 | if (upd_step_stack_frame_id) | |
2025 | tp->control.step_stack_frame_id = frame_id; | |
2026 | } | |
492d29ea | 2027 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
2028 | { |
2029 | xfree (btinfo->replay); | |
2030 | btinfo->replay = NULL; | |
2031 | ||
2032 | registers_changed_ptid (tp->ptid); | |
2033 | ||
2034 | throw_exception (except); | |
2035 | } | |
492d29ea | 2036 | END_CATCH |
52834460 MM |
2037 | |
2038 | return replay; | |
2039 | } | |
2040 | ||
2041 | /* Stop replaying a thread. */ | |
2042 | ||
2043 | static void | |
2044 | record_btrace_stop_replaying (struct thread_info *tp) | |
2045 | { | |
2046 | struct btrace_thread_info *btinfo; | |
2047 | ||
2048 | btinfo = &tp->btrace; | |
2049 | ||
2050 | xfree (btinfo->replay); | |
2051 | btinfo->replay = NULL; | |
2052 | ||
2053 | /* Make sure we're not leaving any stale registers. */ | |
2054 | registers_changed_ptid (tp->ptid); | |
2055 | } | |
2056 | ||
e3cfc1c7 MM |
2057 | /* Stop replaying TP if it is at the end of its execution history. */ |
2058 | ||
2059 | static void | |
2060 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
2061 | { | |
2062 | struct btrace_insn_iterator *replay, end; | |
2063 | struct btrace_thread_info *btinfo; | |
2064 | ||
2065 | btinfo = &tp->btrace; | |
2066 | replay = btinfo->replay; | |
2067 | ||
2068 | if (replay == NULL) | |
2069 | return; | |
2070 | ||
2071 | btrace_insn_end (&end, btinfo); | |
2072 | ||
2073 | if (btrace_insn_cmp (replay, &end) == 0) | |
2074 | record_btrace_stop_replaying (tp); | |
2075 | } | |
2076 | ||
b2f4cfde MM |
2077 | /* The to_resume method of target record-btrace. */ |
2078 | ||
2079 | static void | |
2080 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2081 | enum gdb_signal signal) | |
2082 | { | |
0ca912df | 2083 | struct thread_info *tp; |
d2939ba2 | 2084 | enum btrace_thread_flag flag, cflag; |
52834460 | 2085 | |
987e68b1 MM |
2086 | DEBUG ("resume %s: %s%s", target_pid_to_str (ptid), |
2087 | execution_direction == EXEC_REVERSE ? "reverse-" : "", | |
2088 | step ? "step" : "cont"); | |
52834460 | 2089 | |
0ca912df MM |
2090 | /* Store the execution direction of the last resume. |
2091 | ||
2092 | If there is more than one to_resume call, we have to rely on infrun | |
2093 | to not change the execution direction in-between. */ | |
70ad5bff MM |
2094 | record_btrace_resume_exec_dir = execution_direction; |
2095 | ||
0ca912df | 2096 | /* As long as we're not replaying, just forward the request. |
52834460 | 2097 | |
0ca912df MM |
2098 | For non-stop targets this means that no thread is replaying. In order to |
2099 | make progress, we may need to explicitly move replaying threads to the end | |
2100 | of their execution history. */ | |
a52eab48 MM |
2101 | if ((execution_direction != EXEC_REVERSE) |
2102 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2103 | { |
e75fdfca | 2104 | ops = ops->beneath; |
04c4fe8c MM |
2105 | ops->to_resume (ops, ptid, step, signal); |
2106 | return; | |
b2f4cfde MM |
2107 | } |
2108 | ||
52834460 | 2109 | /* Compute the btrace thread flag for the requested move. */ |
d2939ba2 MM |
2110 | if (execution_direction == EXEC_REVERSE) |
2111 | { | |
2112 | flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP; | |
2113 | cflag = BTHR_RCONT; | |
2114 | } | |
52834460 | 2115 | else |
d2939ba2 MM |
2116 | { |
2117 | flag = step == 0 ? BTHR_CONT : BTHR_STEP; | |
2118 | cflag = BTHR_CONT; | |
2119 | } | |
52834460 | 2120 | |
52834460 | 2121 | /* We just indicate the resume intent here. The actual stepping happens in |
d2939ba2 MM |
2122 | record_btrace_wait below. |
2123 | ||
2124 | For all-stop targets, we only step INFERIOR_PTID and continue others. */ | |
2125 | if (!target_is_non_stop_p ()) | |
2126 | { | |
2127 | gdb_assert (ptid_match (inferior_ptid, ptid)); | |
2128 | ||
2129 | ALL_NON_EXITED_THREADS (tp) | |
2130 | if (ptid_match (tp->ptid, ptid)) | |
2131 | { | |
2132 | if (ptid_match (tp->ptid, inferior_ptid)) | |
2133 | record_btrace_resume_thread (tp, flag); | |
2134 | else | |
2135 | record_btrace_resume_thread (tp, cflag); | |
2136 | } | |
2137 | } | |
2138 | else | |
2139 | { | |
2140 | ALL_NON_EXITED_THREADS (tp) | |
2141 | if (ptid_match (tp->ptid, ptid)) | |
2142 | record_btrace_resume_thread (tp, flag); | |
2143 | } | |
70ad5bff MM |
2144 | |
2145 | /* Async support. */ | |
2146 | if (target_can_async_p ()) | |
2147 | { | |
6a3753b3 | 2148 | target_async (1); |
70ad5bff MM |
2149 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
2150 | } | |
52834460 MM |
2151 | } |
2152 | ||
85ad3aaf PA |
2153 | /* The to_commit_resume method of target record-btrace. */ |
2154 | ||
2155 | static void | |
2156 | record_btrace_commit_resume (struct target_ops *ops) | |
2157 | { | |
2158 | if ((execution_direction != EXEC_REVERSE) | |
2159 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
2160 | ops->beneath->to_commit_resume (ops->beneath); | |
2161 | } | |
2162 | ||
987e68b1 MM |
2163 | /* Cancel resuming TP. */ |
2164 | ||
2165 | static void | |
2166 | record_btrace_cancel_resume (struct thread_info *tp) | |
2167 | { | |
2168 | enum btrace_thread_flag flags; | |
2169 | ||
2170 | flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP); | |
2171 | if (flags == 0) | |
2172 | return; | |
2173 | ||
43792cf0 PA |
2174 | DEBUG ("cancel resume thread %s (%s): %x (%s)", |
2175 | print_thread_id (tp), | |
987e68b1 MM |
2176 | target_pid_to_str (tp->ptid), flags, |
2177 | btrace_thread_flag_to_str (flags)); | |
2178 | ||
2179 | tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP); | |
e3cfc1c7 | 2180 | record_btrace_stop_replaying_at_end (tp); |
52834460 MM |
2181 | } |
2182 | ||
2183 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
2184 | ||
2185 | static struct target_waitstatus | |
2186 | btrace_step_no_history (void) | |
2187 | { | |
2188 | struct target_waitstatus status; | |
2189 | ||
2190 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
2191 | ||
2192 | return status; | |
2193 | } | |
2194 | ||
2195 | /* Return a target_waitstatus indicating that a step finished. */ | |
2196 | ||
2197 | static struct target_waitstatus | |
2198 | btrace_step_stopped (void) | |
2199 | { | |
2200 | struct target_waitstatus status; | |
2201 | ||
2202 | status.kind = TARGET_WAITKIND_STOPPED; | |
2203 | status.value.sig = GDB_SIGNAL_TRAP; | |
2204 | ||
2205 | return status; | |
2206 | } | |
2207 | ||
6e4879f0 MM |
2208 | /* Return a target_waitstatus indicating that a thread was stopped as |
2209 | requested. */ | |
2210 | ||
2211 | static struct target_waitstatus | |
2212 | btrace_step_stopped_on_request (void) | |
2213 | { | |
2214 | struct target_waitstatus status; | |
2215 | ||
2216 | status.kind = TARGET_WAITKIND_STOPPED; | |
2217 | status.value.sig = GDB_SIGNAL_0; | |
2218 | ||
2219 | return status; | |
2220 | } | |
2221 | ||
d825d248 MM |
2222 | /* Return a target_waitstatus indicating a spurious stop. */ |
2223 | ||
2224 | static struct target_waitstatus | |
2225 | btrace_step_spurious (void) | |
2226 | { | |
2227 | struct target_waitstatus status; | |
2228 | ||
2229 | status.kind = TARGET_WAITKIND_SPURIOUS; | |
2230 | ||
2231 | return status; | |
2232 | } | |
2233 | ||
e3cfc1c7 MM |
2234 | /* Return a target_waitstatus indicating that the thread was not resumed. */ |
2235 | ||
2236 | static struct target_waitstatus | |
2237 | btrace_step_no_resumed (void) | |
2238 | { | |
2239 | struct target_waitstatus status; | |
2240 | ||
2241 | status.kind = TARGET_WAITKIND_NO_RESUMED; | |
2242 | ||
2243 | return status; | |
2244 | } | |
2245 | ||
2246 | /* Return a target_waitstatus indicating that we should wait again. */ | |
2247 | ||
2248 | static struct target_waitstatus | |
2249 | btrace_step_again (void) | |
2250 | { | |
2251 | struct target_waitstatus status; | |
2252 | ||
2253 | status.kind = TARGET_WAITKIND_IGNORE; | |
2254 | ||
2255 | return status; | |
2256 | } | |
2257 | ||
52834460 MM |
2258 | /* Clear the record histories. */ |
2259 | ||
2260 | static void | |
2261 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
2262 | { | |
2263 | xfree (btinfo->insn_history); | |
2264 | xfree (btinfo->call_history); | |
2265 | ||
2266 | btinfo->insn_history = NULL; | |
2267 | btinfo->call_history = NULL; | |
2268 | } | |
2269 | ||
3c615f99 MM |
2270 | /* Check whether TP's current replay position is at a breakpoint. */ |
2271 | ||
2272 | static int | |
2273 | record_btrace_replay_at_breakpoint (struct thread_info *tp) | |
2274 | { | |
2275 | struct btrace_insn_iterator *replay; | |
2276 | struct btrace_thread_info *btinfo; | |
2277 | const struct btrace_insn *insn; | |
2278 | struct inferior *inf; | |
2279 | ||
2280 | btinfo = &tp->btrace; | |
2281 | replay = btinfo->replay; | |
2282 | ||
2283 | if (replay == NULL) | |
2284 | return 0; | |
2285 | ||
2286 | insn = btrace_insn_get (replay); | |
2287 | if (insn == NULL) | |
2288 | return 0; | |
2289 | ||
2290 | inf = find_inferior_ptid (tp->ptid); | |
2291 | if (inf == NULL) | |
2292 | return 0; | |
2293 | ||
2294 | return record_check_stopped_by_breakpoint (inf->aspace, insn->pc, | |
2295 | &btinfo->stop_reason); | |
2296 | } | |
2297 | ||
d825d248 | 2298 | /* Step one instruction in forward direction. */ |
52834460 MM |
2299 | |
2300 | static struct target_waitstatus | |
d825d248 | 2301 | record_btrace_single_step_forward (struct thread_info *tp) |
52834460 | 2302 | { |
b61ce85c | 2303 | struct btrace_insn_iterator *replay, end, start; |
52834460 | 2304 | struct btrace_thread_info *btinfo; |
52834460 | 2305 | |
d825d248 MM |
2306 | btinfo = &tp->btrace; |
2307 | replay = btinfo->replay; | |
2308 | ||
2309 | /* We're done if we're not replaying. */ | |
2310 | if (replay == NULL) | |
2311 | return btrace_step_no_history (); | |
2312 | ||
011c71b6 MM |
2313 | /* Check if we're stepping a breakpoint. */ |
2314 | if (record_btrace_replay_at_breakpoint (tp)) | |
2315 | return btrace_step_stopped (); | |
2316 | ||
b61ce85c MM |
2317 | /* Skip gaps during replay. If we end up at a gap (at the end of the trace), |
2318 | jump back to the instruction at which we started. */ | |
2319 | start = *replay; | |
d825d248 MM |
2320 | do |
2321 | { | |
2322 | unsigned int steps; | |
2323 | ||
e3cfc1c7 MM |
2324 | /* We will bail out here if we continue stepping after reaching the end |
2325 | of the execution history. */ | |
d825d248 MM |
2326 | steps = btrace_insn_next (replay, 1); |
2327 | if (steps == 0) | |
b61ce85c MM |
2328 | { |
2329 | *replay = start; | |
2330 | return btrace_step_no_history (); | |
2331 | } | |
d825d248 MM |
2332 | } |
2333 | while (btrace_insn_get (replay) == NULL); | |
2334 | ||
2335 | /* Determine the end of the instruction trace. */ | |
2336 | btrace_insn_end (&end, btinfo); | |
2337 | ||
e3cfc1c7 MM |
2338 | /* The execution trace contains (and ends with) the current instruction. |
2339 | This instruction has not been executed, yet, so the trace really ends | |
2340 | one instruction earlier. */ | |
d825d248 | 2341 | if (btrace_insn_cmp (replay, &end) == 0) |
e3cfc1c7 | 2342 | return btrace_step_no_history (); |
d825d248 MM |
2343 | |
2344 | return btrace_step_spurious (); | |
2345 | } | |
2346 | ||
2347 | /* Step one instruction in backward direction. */ | |
2348 | ||
2349 | static struct target_waitstatus | |
2350 | record_btrace_single_step_backward (struct thread_info *tp) | |
2351 | { | |
b61ce85c | 2352 | struct btrace_insn_iterator *replay, start; |
d825d248 | 2353 | struct btrace_thread_info *btinfo; |
e59fa00f | 2354 | |
52834460 MM |
2355 | btinfo = &tp->btrace; |
2356 | replay = btinfo->replay; | |
2357 | ||
d825d248 MM |
2358 | /* Start replaying if we're not already doing so. */ |
2359 | if (replay == NULL) | |
2360 | replay = record_btrace_start_replaying (tp); | |
2361 | ||
2362 | /* If we can't step any further, we reached the end of the history. | |
b61ce85c MM |
2363 | Skip gaps during replay. If we end up at a gap (at the beginning of |
2364 | the trace), jump back to the instruction at which we started. */ | |
2365 | start = *replay; | |
d825d248 MM |
2366 | do |
2367 | { | |
2368 | unsigned int steps; | |
2369 | ||
2370 | steps = btrace_insn_prev (replay, 1); | |
2371 | if (steps == 0) | |
b61ce85c MM |
2372 | { |
2373 | *replay = start; | |
2374 | return btrace_step_no_history (); | |
2375 | } | |
d825d248 MM |
2376 | } |
2377 | while (btrace_insn_get (replay) == NULL); | |
2378 | ||
011c71b6 MM |
2379 | /* Check if we're stepping a breakpoint. |
2380 | ||
2381 | For reverse-stepping, this check is after the step. There is logic in | |
2382 | infrun.c that handles reverse-stepping separately. See, for example, | |
2383 | proceed and adjust_pc_after_break. | |
2384 | ||
2385 | This code assumes that for reverse-stepping, PC points to the last | |
2386 | de-executed instruction, whereas for forward-stepping PC points to the | |
2387 | next to-be-executed instruction. */ | |
2388 | if (record_btrace_replay_at_breakpoint (tp)) | |
2389 | return btrace_step_stopped (); | |
2390 | ||
d825d248 MM |
2391 | return btrace_step_spurious (); |
2392 | } | |
2393 | ||
2394 | /* Step a single thread. */ | |
2395 | ||
2396 | static struct target_waitstatus | |
2397 | record_btrace_step_thread (struct thread_info *tp) | |
2398 | { | |
2399 | struct btrace_thread_info *btinfo; | |
2400 | struct target_waitstatus status; | |
2401 | enum btrace_thread_flag flags; | |
2402 | ||
2403 | btinfo = &tp->btrace; | |
2404 | ||
6e4879f0 MM |
2405 | flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP); |
2406 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 | 2407 | |
43792cf0 | 2408 | DEBUG ("stepping thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 MM |
2409 | target_pid_to_str (tp->ptid), flags, |
2410 | btrace_thread_flag_to_str (flags)); | |
52834460 | 2411 | |
6e4879f0 MM |
2412 | /* We can't step without an execution history. */ |
2413 | if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp)) | |
2414 | return btrace_step_no_history (); | |
2415 | ||
52834460 MM |
2416 | switch (flags) |
2417 | { | |
2418 | default: | |
2419 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
2420 | ||
6e4879f0 MM |
2421 | case BTHR_STOP: |
2422 | return btrace_step_stopped_on_request (); | |
2423 | ||
52834460 | 2424 | case BTHR_STEP: |
d825d248 MM |
2425 | status = record_btrace_single_step_forward (tp); |
2426 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2427 | break; |
52834460 MM |
2428 | |
2429 | return btrace_step_stopped (); | |
2430 | ||
2431 | case BTHR_RSTEP: | |
d825d248 MM |
2432 | status = record_btrace_single_step_backward (tp); |
2433 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2434 | break; |
52834460 MM |
2435 | |
2436 | return btrace_step_stopped (); | |
2437 | ||
2438 | case BTHR_CONT: | |
e3cfc1c7 MM |
2439 | status = record_btrace_single_step_forward (tp); |
2440 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2441 | break; | |
52834460 | 2442 | |
e3cfc1c7 MM |
2443 | btinfo->flags |= flags; |
2444 | return btrace_step_again (); | |
52834460 MM |
2445 | |
2446 | case BTHR_RCONT: | |
e3cfc1c7 MM |
2447 | status = record_btrace_single_step_backward (tp); |
2448 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2449 | break; | |
52834460 | 2450 | |
e3cfc1c7 MM |
2451 | btinfo->flags |= flags; |
2452 | return btrace_step_again (); | |
2453 | } | |
d825d248 | 2454 | |
e3cfc1c7 MM |
2455 | /* We keep threads moving at the end of their execution history. The to_wait |
2456 | method will stop the thread for whom the event is reported. */ | |
2457 | if (status.kind == TARGET_WAITKIND_NO_HISTORY) | |
2458 | btinfo->flags |= flags; | |
52834460 | 2459 | |
e3cfc1c7 | 2460 | return status; |
b2f4cfde MM |
2461 | } |
2462 | ||
e3cfc1c7 MM |
2463 | /* A vector of threads. */ |
2464 | ||
2465 | typedef struct thread_info * tp_t; | |
2466 | DEF_VEC_P (tp_t); | |
2467 | ||
a6b5be76 MM |
2468 | /* Announce further events if necessary. */ |
2469 | ||
2470 | static void | |
2471 | record_btrace_maybe_mark_async_event (const VEC (tp_t) *moving, | |
2472 | const VEC (tp_t) *no_history) | |
2473 | { | |
2474 | int more_moving, more_no_history; | |
2475 | ||
2476 | more_moving = !VEC_empty (tp_t, moving); | |
2477 | more_no_history = !VEC_empty (tp_t, no_history); | |
2478 | ||
2479 | if (!more_moving && !more_no_history) | |
2480 | return; | |
2481 | ||
2482 | if (more_moving) | |
2483 | DEBUG ("movers pending"); | |
2484 | ||
2485 | if (more_no_history) | |
2486 | DEBUG ("no-history pending"); | |
2487 | ||
2488 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
2489 | } | |
2490 | ||
b2f4cfde MM |
2491 | /* The to_wait method of target record-btrace. */ |
2492 | ||
2493 | static ptid_t | |
2494 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2495 | struct target_waitstatus *status, int options) | |
2496 | { | |
e3cfc1c7 MM |
2497 | VEC (tp_t) *moving, *no_history; |
2498 | struct thread_info *tp, *eventing; | |
2499 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
52834460 MM |
2500 | |
2501 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2502 | ||
b2f4cfde | 2503 | /* As long as we're not replaying, just forward the request. */ |
a52eab48 MM |
2504 | if ((execution_direction != EXEC_REVERSE) |
2505 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2506 | { |
e75fdfca TT |
2507 | ops = ops->beneath; |
2508 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2509 | } |
2510 | ||
e3cfc1c7 MM |
2511 | moving = NULL; |
2512 | no_history = NULL; | |
2513 | ||
2514 | make_cleanup (VEC_cleanup (tp_t), &moving); | |
2515 | make_cleanup (VEC_cleanup (tp_t), &no_history); | |
2516 | ||
2517 | /* Keep a work list of moving threads. */ | |
2518 | ALL_NON_EXITED_THREADS (tp) | |
2519 | if (ptid_match (tp->ptid, ptid) | |
2520 | && ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)) | |
2521 | VEC_safe_push (tp_t, moving, tp); | |
2522 | ||
2523 | if (VEC_empty (tp_t, moving)) | |
52834460 | 2524 | { |
e3cfc1c7 | 2525 | *status = btrace_step_no_resumed (); |
52834460 | 2526 | |
e3cfc1c7 MM |
2527 | DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid), |
2528 | target_waitstatus_to_string (status)); | |
2529 | ||
2530 | do_cleanups (cleanups); | |
2531 | return null_ptid; | |
52834460 MM |
2532 | } |
2533 | ||
e3cfc1c7 MM |
2534 | /* Step moving threads one by one, one step each, until either one thread |
2535 | reports an event or we run out of threads to step. | |
2536 | ||
2537 | When stepping more than one thread, chances are that some threads reach | |
2538 | the end of their execution history earlier than others. If we reported | |
2539 | this immediately, all-stop on top of non-stop would stop all threads and | |
2540 | resume the same threads next time. And we would report the same thread | |
2541 | having reached the end of its execution history again. | |
2542 | ||
2543 | In the worst case, this would starve the other threads. But even if other | |
2544 | threads would be allowed to make progress, this would result in far too | |
2545 | many intermediate stops. | |
2546 | ||
2547 | We therefore delay the reporting of "no execution history" until we have | |
2548 | nothing else to report. By this time, all threads should have moved to | |
2549 | either the beginning or the end of their execution history. There will | |
2550 | be a single user-visible stop. */ | |
2551 | eventing = NULL; | |
2552 | while ((eventing == NULL) && !VEC_empty (tp_t, moving)) | |
2553 | { | |
2554 | unsigned int ix; | |
2555 | ||
2556 | ix = 0; | |
2557 | while ((eventing == NULL) && VEC_iterate (tp_t, moving, ix, tp)) | |
2558 | { | |
2559 | *status = record_btrace_step_thread (tp); | |
2560 | ||
2561 | switch (status->kind) | |
2562 | { | |
2563 | case TARGET_WAITKIND_IGNORE: | |
2564 | ix++; | |
2565 | break; | |
2566 | ||
2567 | case TARGET_WAITKIND_NO_HISTORY: | |
2568 | VEC_safe_push (tp_t, no_history, | |
2569 | VEC_ordered_remove (tp_t, moving, ix)); | |
2570 | break; | |
2571 | ||
2572 | default: | |
2573 | eventing = VEC_unordered_remove (tp_t, moving, ix); | |
2574 | break; | |
2575 | } | |
2576 | } | |
2577 | } | |
2578 | ||
2579 | if (eventing == NULL) | |
2580 | { | |
2581 | /* We started with at least one moving thread. This thread must have | |
2582 | either stopped or reached the end of its execution history. | |
2583 | ||
2584 | In the former case, EVENTING must not be NULL. | |
2585 | In the latter case, NO_HISTORY must not be empty. */ | |
2586 | gdb_assert (!VEC_empty (tp_t, no_history)); | |
2587 | ||
2588 | /* We kept threads moving at the end of their execution history. Stop | |
2589 | EVENTING now that we are going to report its stop. */ | |
2590 | eventing = VEC_unordered_remove (tp_t, no_history, 0); | |
2591 | eventing->btrace.flags &= ~BTHR_MOVE; | |
2592 | ||
2593 | *status = btrace_step_no_history (); | |
2594 | } | |
2595 | ||
2596 | gdb_assert (eventing != NULL); | |
2597 | ||
2598 | /* We kept threads replaying at the end of their execution history. Stop | |
2599 | replaying EVENTING now that we are going to report its stop. */ | |
2600 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2601 | |
2602 | /* Stop all other threads. */ | |
5953356c | 2603 | if (!target_is_non_stop_p ()) |
e3cfc1c7 MM |
2604 | ALL_NON_EXITED_THREADS (tp) |
2605 | record_btrace_cancel_resume (tp); | |
52834460 | 2606 | |
a6b5be76 MM |
2607 | /* In async mode, we need to announce further events. */ |
2608 | if (target_is_async_p ()) | |
2609 | record_btrace_maybe_mark_async_event (moving, no_history); | |
2610 | ||
52834460 | 2611 | /* Start record histories anew from the current position. */ |
e3cfc1c7 | 2612 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2613 | |
2614 | /* We moved the replay position but did not update registers. */ | |
e3cfc1c7 MM |
2615 | registers_changed_ptid (eventing->ptid); |
2616 | ||
43792cf0 PA |
2617 | DEBUG ("wait ended by thread %s (%s): %s", |
2618 | print_thread_id (eventing), | |
e3cfc1c7 MM |
2619 | target_pid_to_str (eventing->ptid), |
2620 | target_waitstatus_to_string (status)); | |
52834460 | 2621 | |
e3cfc1c7 MM |
2622 | do_cleanups (cleanups); |
2623 | return eventing->ptid; | |
52834460 MM |
2624 | } |
2625 | ||
6e4879f0 MM |
2626 | /* The to_stop method of target record-btrace. */ |
2627 | ||
2628 | static void | |
2629 | record_btrace_stop (struct target_ops *ops, ptid_t ptid) | |
2630 | { | |
2631 | DEBUG ("stop %s", target_pid_to_str (ptid)); | |
2632 | ||
2633 | /* As long as we're not replaying, just forward the request. */ | |
a52eab48 MM |
2634 | if ((execution_direction != EXEC_REVERSE) |
2635 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
6e4879f0 MM |
2636 | { |
2637 | ops = ops->beneath; | |
2638 | ops->to_stop (ops, ptid); | |
2639 | } | |
2640 | else | |
2641 | { | |
2642 | struct thread_info *tp; | |
2643 | ||
2644 | ALL_NON_EXITED_THREADS (tp) | |
2645 | if (ptid_match (tp->ptid, ptid)) | |
2646 | { | |
2647 | tp->btrace.flags &= ~BTHR_MOVE; | |
2648 | tp->btrace.flags |= BTHR_STOP; | |
2649 | } | |
2650 | } | |
2651 | } | |
2652 | ||
52834460 MM |
2653 | /* The to_can_execute_reverse method of target record-btrace. */ |
2654 | ||
2655 | static int | |
19db3e69 | 2656 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2657 | { |
2658 | return 1; | |
2659 | } | |
2660 | ||
9e8915c6 | 2661 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2662 | |
9e8915c6 PA |
2663 | static int |
2664 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2665 | { |
a52eab48 | 2666 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2667 | { |
2668 | struct thread_info *tp = inferior_thread (); | |
2669 | ||
2670 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2671 | } | |
2672 | ||
2673 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2674 | } | |
2675 | ||
2676 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2677 | record-btrace. */ | |
2678 | ||
2679 | static int | |
2680 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2681 | { | |
a52eab48 | 2682 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2683 | return 1; |
2684 | ||
2685 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2686 | } | |
2687 | ||
2688 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2689 | ||
2690 | static int | |
2691 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2692 | { | |
a52eab48 | 2693 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2694 | { |
2695 | struct thread_info *tp = inferior_thread (); | |
2696 | ||
2697 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2698 | } | |
2699 | ||
2700 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2701 | } | |
2702 | ||
2703 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2704 | record-btrace. */ | |
2705 | ||
2706 | static int | |
2707 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2708 | { | |
a52eab48 | 2709 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 | 2710 | return 1; |
52834460 | 2711 | |
9e8915c6 | 2712 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2713 | } |
2714 | ||
e8032dde | 2715 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2716 | |
2717 | static void | |
e8032dde | 2718 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2719 | { |
e8032dde | 2720 | /* We don't add or remove threads during replay. */ |
a52eab48 | 2721 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2722 | return; |
2723 | ||
2724 | /* Forward the request. */ | |
e75fdfca | 2725 | ops = ops->beneath; |
e8032dde | 2726 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2727 | } |
2728 | ||
2729 | /* The to_thread_alive method of target record-btrace. */ | |
2730 | ||
2731 | static int | |
2732 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2733 | { | |
2734 | /* We don't add or remove threads during replay. */ | |
a52eab48 | 2735 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2736 | return find_thread_ptid (ptid) != NULL; |
2737 | ||
2738 | /* Forward the request. */ | |
e75fdfca TT |
2739 | ops = ops->beneath; |
2740 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2741 | } |
2742 | ||
066ce621 MM |
2743 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2744 | is stopped. */ | |
2745 | ||
2746 | static void | |
2747 | record_btrace_set_replay (struct thread_info *tp, | |
2748 | const struct btrace_insn_iterator *it) | |
2749 | { | |
2750 | struct btrace_thread_info *btinfo; | |
2751 | ||
2752 | btinfo = &tp->btrace; | |
2753 | ||
2754 | if (it == NULL || it->function == NULL) | |
52834460 | 2755 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2756 | else |
2757 | { | |
2758 | if (btinfo->replay == NULL) | |
52834460 | 2759 | record_btrace_start_replaying (tp); |
066ce621 MM |
2760 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2761 | return; | |
2762 | ||
2763 | *btinfo->replay = *it; | |
52834460 | 2764 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2765 | } |
2766 | ||
52834460 MM |
2767 | /* Start anew from the new replay position. */ |
2768 | record_btrace_clear_histories (btinfo); | |
485668e5 MM |
2769 | |
2770 | stop_pc = regcache_read_pc (get_current_regcache ()); | |
2771 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
066ce621 MM |
2772 | } |
2773 | ||
2774 | /* The to_goto_record_begin method of target record-btrace. */ | |
2775 | ||
2776 | static void | |
08475817 | 2777 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2778 | { |
2779 | struct thread_info *tp; | |
2780 | struct btrace_insn_iterator begin; | |
2781 | ||
2782 | tp = require_btrace_thread (); | |
2783 | ||
2784 | btrace_insn_begin (&begin, &tp->btrace); | |
b61ce85c MM |
2785 | |
2786 | /* Skip gaps at the beginning of the trace. */ | |
2787 | while (btrace_insn_get (&begin) == NULL) | |
2788 | { | |
2789 | unsigned int steps; | |
2790 | ||
2791 | steps = btrace_insn_next (&begin, 1); | |
2792 | if (steps == 0) | |
2793 | error (_("No trace.")); | |
2794 | } | |
2795 | ||
066ce621 | 2796 | record_btrace_set_replay (tp, &begin); |
066ce621 MM |
2797 | } |
2798 | ||
2799 | /* The to_goto_record_end method of target record-btrace. */ | |
2800 | ||
2801 | static void | |
307a1b91 | 2802 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2803 | { |
2804 | struct thread_info *tp; | |
2805 | ||
2806 | tp = require_btrace_thread (); | |
2807 | ||
2808 | record_btrace_set_replay (tp, NULL); | |
066ce621 MM |
2809 | } |
2810 | ||
2811 | /* The to_goto_record method of target record-btrace. */ | |
2812 | ||
2813 | static void | |
606183ac | 2814 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2815 | { |
2816 | struct thread_info *tp; | |
2817 | struct btrace_insn_iterator it; | |
2818 | unsigned int number; | |
2819 | int found; | |
2820 | ||
2821 | number = insn; | |
2822 | ||
2823 | /* Check for wrap-arounds. */ | |
2824 | if (number != insn) | |
2825 | error (_("Instruction number out of range.")); | |
2826 | ||
2827 | tp = require_btrace_thread (); | |
2828 | ||
2829 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2830 | if (found == 0) | |
2831 | error (_("No such instruction.")); | |
2832 | ||
2833 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2834 | } |
2835 | ||
797094dd MM |
2836 | /* The to_record_stop_replaying method of target record-btrace. */ |
2837 | ||
2838 | static void | |
2839 | record_btrace_stop_replaying_all (struct target_ops *self) | |
2840 | { | |
2841 | struct thread_info *tp; | |
2842 | ||
2843 | ALL_NON_EXITED_THREADS (tp) | |
2844 | record_btrace_stop_replaying (tp); | |
2845 | } | |
2846 | ||
70ad5bff MM |
2847 | /* The to_execution_direction target method. */ |
2848 | ||
2849 | static enum exec_direction_kind | |
2850 | record_btrace_execution_direction (struct target_ops *self) | |
2851 | { | |
2852 | return record_btrace_resume_exec_dir; | |
2853 | } | |
2854 | ||
aef92902 MM |
2855 | /* The to_prepare_to_generate_core target method. */ |
2856 | ||
2857 | static void | |
2858 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2859 | { | |
2860 | record_btrace_generating_corefile = 1; | |
2861 | } | |
2862 | ||
2863 | /* The to_done_generating_core target method. */ | |
2864 | ||
2865 | static void | |
2866 | record_btrace_done_generating_core (struct target_ops *self) | |
2867 | { | |
2868 | record_btrace_generating_corefile = 0; | |
2869 | } | |
2870 | ||
afedecd3 MM |
2871 | /* Initialize the record-btrace target ops. */ |
2872 | ||
2873 | static void | |
2874 | init_record_btrace_ops (void) | |
2875 | { | |
2876 | struct target_ops *ops; | |
2877 | ||
2878 | ops = &record_btrace_ops; | |
2879 | ops->to_shortname = "record-btrace"; | |
2880 | ops->to_longname = "Branch tracing target"; | |
2881 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2882 | ops->to_open = record_btrace_open; | |
2883 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2884 | ops->to_async = record_btrace_async; |
afedecd3 | 2885 | ops->to_detach = record_detach; |
c0272db5 | 2886 | ops->to_disconnect = record_btrace_disconnect; |
afedecd3 MM |
2887 | ops->to_mourn_inferior = record_mourn_inferior; |
2888 | ops->to_kill = record_kill; | |
afedecd3 MM |
2889 | ops->to_stop_recording = record_btrace_stop_recording; |
2890 | ops->to_info_record = record_btrace_info; | |
2891 | ops->to_insn_history = record_btrace_insn_history; | |
2892 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2893 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2894 | ops->to_call_history = record_btrace_call_history; | |
2895 | ops->to_call_history_from = record_btrace_call_history_from; | |
2896 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2897 | ops->to_record_is_replaying = record_btrace_is_replaying; |
7ff27e9b | 2898 | ops->to_record_will_replay = record_btrace_will_replay; |
797094dd | 2899 | ops->to_record_stop_replaying = record_btrace_stop_replaying_all; |
633785ff MM |
2900 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2901 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2902 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2903 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2904 | ops->to_store_registers = record_btrace_store_registers; | |
2905 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2906 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2907 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde | 2908 | ops->to_resume = record_btrace_resume; |
85ad3aaf | 2909 | ops->to_commit_resume = record_btrace_commit_resume; |
b2f4cfde | 2910 | ops->to_wait = record_btrace_wait; |
6e4879f0 | 2911 | ops->to_stop = record_btrace_stop; |
e8032dde | 2912 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2913 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2914 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2915 | ops->to_goto_record_end = record_btrace_goto_end; | |
2916 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2917 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2918 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2919 | ops->to_supports_stopped_by_sw_breakpoint | |
2920 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2921 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2922 | ops->to_supports_stopped_by_hw_breakpoint | |
2923 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2924 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2925 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2926 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2927 | ops->to_stratum = record_stratum; |
2928 | ops->to_magic = OPS_MAGIC; | |
2929 | } | |
2930 | ||
f4abbc16 MM |
2931 | /* Start recording in BTS format. */ |
2932 | ||
2933 | static void | |
2934 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2935 | { | |
f4abbc16 MM |
2936 | if (args != NULL && *args != 0) |
2937 | error (_("Invalid argument.")); | |
2938 | ||
2939 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2940 | ||
492d29ea PA |
2941 | TRY |
2942 | { | |
2943 | execute_command ("target record-btrace", from_tty); | |
2944 | } | |
2945 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2946 | { |
2947 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2948 | throw_exception (exception); | |
2949 | } | |
492d29ea | 2950 | END_CATCH |
f4abbc16 MM |
2951 | } |
2952 | ||
bc504a31 | 2953 | /* Start recording in Intel Processor Trace format. */ |
afedecd3 MM |
2954 | |
2955 | static void | |
b20a6524 | 2956 | cmd_record_btrace_pt_start (char *args, int from_tty) |
afedecd3 MM |
2957 | { |
2958 | if (args != NULL && *args != 0) | |
2959 | error (_("Invalid argument.")); | |
2960 | ||
b20a6524 | 2961 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2962 | |
492d29ea PA |
2963 | TRY |
2964 | { | |
2965 | execute_command ("target record-btrace", from_tty); | |
2966 | } | |
2967 | CATCH (exception, RETURN_MASK_ALL) | |
2968 | { | |
2969 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2970 | throw_exception (exception); | |
2971 | } | |
2972 | END_CATCH | |
afedecd3 MM |
2973 | } |
2974 | ||
b20a6524 MM |
2975 | /* Alias for "target record". */ |
2976 | ||
2977 | static void | |
2978 | cmd_record_btrace_start (char *args, int from_tty) | |
2979 | { | |
2980 | if (args != NULL && *args != 0) | |
2981 | error (_("Invalid argument.")); | |
2982 | ||
2983 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2984 | ||
2985 | TRY | |
2986 | { | |
2987 | execute_command ("target record-btrace", from_tty); | |
2988 | } | |
2989 | CATCH (exception, RETURN_MASK_ALL) | |
2990 | { | |
2991 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2992 | ||
2993 | TRY | |
2994 | { | |
2995 | execute_command ("target record-btrace", from_tty); | |
2996 | } | |
2997 | CATCH (exception, RETURN_MASK_ALL) | |
2998 | { | |
2999 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
3000 | throw_exception (exception); | |
3001 | } | |
3002 | END_CATCH | |
3003 | } | |
3004 | END_CATCH | |
3005 | } | |
3006 | ||
67b5c0c1 MM |
3007 | /* The "set record btrace" command. */ |
3008 | ||
3009 | static void | |
3010 | cmd_set_record_btrace (char *args, int from_tty) | |
3011 | { | |
3012 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
3013 | } | |
3014 | ||
3015 | /* The "show record btrace" command. */ | |
3016 | ||
3017 | static void | |
3018 | cmd_show_record_btrace (char *args, int from_tty) | |
3019 | { | |
3020 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
3021 | } | |
3022 | ||
3023 | /* The "show record btrace replay-memory-access" command. */ | |
3024 | ||
3025 | static void | |
3026 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
3027 | struct cmd_list_element *c, const char *value) | |
3028 | { | |
3029 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
3030 | replay_memory_access); | |
3031 | } | |
3032 | ||
d33501a5 MM |
3033 | /* The "set record btrace bts" command. */ |
3034 | ||
3035 | static void | |
3036 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
3037 | { | |
3038 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
b20a6524 | 3039 | "by an appropriate subcommand.\n")); |
d33501a5 MM |
3040 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", |
3041 | all_commands, gdb_stdout); | |
3042 | } | |
3043 | ||
3044 | /* The "show record btrace bts" command. */ | |
3045 | ||
3046 | static void | |
3047 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
3048 | { | |
3049 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
3050 | } | |
3051 | ||
b20a6524 MM |
3052 | /* The "set record btrace pt" command. */ |
3053 | ||
3054 | static void | |
3055 | cmd_set_record_btrace_pt (char *args, int from_tty) | |
3056 | { | |
3057 | printf_unfiltered (_("\"set record btrace pt\" must be followed " | |
3058 | "by an appropriate subcommand.\n")); | |
3059 | help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ", | |
3060 | all_commands, gdb_stdout); | |
3061 | } | |
3062 | ||
3063 | /* The "show record btrace pt" command. */ | |
3064 | ||
3065 | static void | |
3066 | cmd_show_record_btrace_pt (char *args, int from_tty) | |
3067 | { | |
3068 | cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, ""); | |
3069 | } | |
3070 | ||
3071 | /* The "record bts buffer-size" show value function. */ | |
3072 | ||
3073 | static void | |
3074 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
3075 | struct cmd_list_element *c, | |
3076 | const char *value) | |
3077 | { | |
3078 | fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"), | |
3079 | value); | |
3080 | } | |
3081 | ||
3082 | /* The "record pt buffer-size" show value function. */ | |
3083 | ||
3084 | static void | |
3085 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
3086 | struct cmd_list_element *c, | |
3087 | const char *value) | |
3088 | { | |
3089 | fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"), | |
3090 | value); | |
3091 | } | |
3092 | ||
afedecd3 MM |
3093 | void _initialize_record_btrace (void); |
3094 | ||
3095 | /* Initialize btrace commands. */ | |
3096 | ||
3097 | void | |
3098 | _initialize_record_btrace (void) | |
3099 | { | |
f4abbc16 MM |
3100 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
3101 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
3102 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
3103 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
3104 | ||
f4abbc16 MM |
3105 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
3106 | _("\ | |
3107 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
3108 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
3109 | This format may not be available on all processors."), | |
3110 | &record_btrace_cmdlist); | |
3111 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
3112 | ||
b20a6524 MM |
3113 | add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, |
3114 | _("\ | |
bc504a31 | 3115 | Start branch trace recording in Intel Processor Trace format.\n\n\ |
b20a6524 MM |
3116 | This format may not be available on all processors."), |
3117 | &record_btrace_cmdlist); | |
3118 | add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist); | |
3119 | ||
67b5c0c1 MM |
3120 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
3121 | _("Set record options"), &set_record_btrace_cmdlist, | |
3122 | "set record btrace ", 0, &set_record_cmdlist); | |
3123 | ||
3124 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
3125 | _("Show record options"), &show_record_btrace_cmdlist, | |
3126 | "show record btrace ", 0, &show_record_cmdlist); | |
3127 | ||
3128 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
3129 | replay_memory_access_types, &replay_memory_access, _("\ | |
3130 | Set what memory accesses are allowed during replay."), _("\ | |
3131 | Show what memory accesses are allowed during replay."), | |
3132 | _("Default is READ-ONLY.\n\n\ | |
3133 | The btrace record target does not trace data.\n\ | |
3134 | The memory therefore corresponds to the live target and not \ | |
3135 | to the current replay position.\n\n\ | |
3136 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
3137 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
3138 | replay."), | |
3139 | NULL, cmd_show_replay_memory_access, | |
3140 | &set_record_btrace_cmdlist, | |
3141 | &show_record_btrace_cmdlist); | |
3142 | ||
d33501a5 MM |
3143 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
3144 | _("Set record btrace bts options"), | |
3145 | &set_record_btrace_bts_cmdlist, | |
3146 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
3147 | ||
3148 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
3149 | _("Show record btrace bts options"), | |
3150 | &show_record_btrace_bts_cmdlist, | |
3151 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
3152 | ||
3153 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3154 | &record_btrace_conf.bts.size, | |
3155 | _("Set the record/replay bts buffer size."), | |
3156 | _("Show the record/replay bts buffer size."), _("\ | |
3157 | When starting recording request a trace buffer of this size. \ | |
3158 | The actual buffer size may differ from the requested size. \ | |
3159 | Use \"info record\" to see the actual buffer size.\n\n\ | |
3160 | Bigger buffers allow longer recording but also take more time to process \ | |
3161 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
3162 | The trace buffer size may not be changed while recording."), NULL, |
3163 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
3164 | &set_record_btrace_bts_cmdlist, |
3165 | &show_record_btrace_bts_cmdlist); | |
3166 | ||
b20a6524 MM |
3167 | add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt, |
3168 | _("Set record btrace pt options"), | |
3169 | &set_record_btrace_pt_cmdlist, | |
3170 | "set record btrace pt ", 0, &set_record_btrace_cmdlist); | |
3171 | ||
3172 | add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt, | |
3173 | _("Show record btrace pt options"), | |
3174 | &show_record_btrace_pt_cmdlist, | |
3175 | "show record btrace pt ", 0, &show_record_btrace_cmdlist); | |
3176 | ||
3177 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3178 | &record_btrace_conf.pt.size, | |
3179 | _("Set the record/replay pt buffer size."), | |
3180 | _("Show the record/replay pt buffer size."), _("\ | |
3181 | Bigger buffers allow longer recording but also take more time to process \ | |
3182 | the recorded execution.\n\ | |
3183 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
3184 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
3185 | &set_record_btrace_pt_cmdlist, | |
3186 | &show_record_btrace_pt_cmdlist); | |
3187 | ||
afedecd3 MM |
3188 | init_record_btrace_ops (); |
3189 | add_target (&record_btrace_ops); | |
0b722aec MM |
3190 | |
3191 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
3192 | xcalloc, xfree); | |
d33501a5 MM |
3193 | |
3194 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 3195 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 3196 | } |