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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
e2882c85 | 3 | Copyright (C) 2013-2018 Free Software Foundation, Inc. |
afedecd3 MM |
4 | |
5 | Contributed by Intel Corp. <markus.t.metzger@intel.com> | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "record.h" | |
c0272db5 | 24 | #include "record-btrace.h" |
afedecd3 MM |
25 | #include "gdbthread.h" |
26 | #include "target.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "disasm.h" | |
29 | #include "observer.h" | |
afedecd3 MM |
30 | #include "cli/cli-utils.h" |
31 | #include "source.h" | |
32 | #include "ui-out.h" | |
33 | #include "symtab.h" | |
34 | #include "filenames.h" | |
1f3ef581 | 35 | #include "regcache.h" |
cecac1ab | 36 | #include "frame-unwind.h" |
0b722aec | 37 | #include "hashtab.h" |
45741a9c | 38 | #include "infrun.h" |
70ad5bff MM |
39 | #include "event-loop.h" |
40 | #include "inf-loop.h" | |
e3cfc1c7 | 41 | #include "vec.h" |
325fac50 | 42 | #include <algorithm> |
afedecd3 MM |
43 | |
44 | /* The target_ops of record-btrace. */ | |
45 | static struct target_ops record_btrace_ops; | |
46 | ||
47 | /* A new thread observer enabling branch tracing for the new thread. */ | |
48 | static struct observer *record_btrace_thread_observer; | |
49 | ||
67b5c0c1 MM |
50 | /* Memory access types used in set/show record btrace replay-memory-access. */ |
51 | static const char replay_memory_access_read_only[] = "read-only"; | |
52 | static const char replay_memory_access_read_write[] = "read-write"; | |
53 | static const char *const replay_memory_access_types[] = | |
54 | { | |
55 | replay_memory_access_read_only, | |
56 | replay_memory_access_read_write, | |
57 | NULL | |
58 | }; | |
59 | ||
60 | /* The currently allowed replay memory access type. */ | |
61 | static const char *replay_memory_access = replay_memory_access_read_only; | |
62 | ||
63 | /* Command lists for "set/show record btrace". */ | |
64 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
65 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
633785ff | 66 | |
70ad5bff MM |
67 | /* The execution direction of the last resume we got. See record-full.c. */ |
68 | static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD; | |
69 | ||
70 | /* The async event handler for reverse/replay execution. */ | |
71 | static struct async_event_handler *record_btrace_async_inferior_event_handler; | |
72 | ||
aef92902 MM |
73 | /* A flag indicating that we are currently generating a core file. */ |
74 | static int record_btrace_generating_corefile; | |
75 | ||
f4abbc16 MM |
76 | /* The current branch trace configuration. */ |
77 | static struct btrace_config record_btrace_conf; | |
78 | ||
79 | /* Command list for "record btrace". */ | |
80 | static struct cmd_list_element *record_btrace_cmdlist; | |
81 | ||
d33501a5 MM |
82 | /* Command lists for "set/show record btrace bts". */ |
83 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
84 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
85 | ||
b20a6524 MM |
86 | /* Command lists for "set/show record btrace pt". */ |
87 | static struct cmd_list_element *set_record_btrace_pt_cmdlist; | |
88 | static struct cmd_list_element *show_record_btrace_pt_cmdlist; | |
89 | ||
afedecd3 MM |
90 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
91 | ambiguities when used in if statements. */ | |
92 | ||
93 | #define DEBUG(msg, args...) \ | |
94 | do \ | |
95 | { \ | |
96 | if (record_debug != 0) \ | |
97 | fprintf_unfiltered (gdb_stdlog, \ | |
98 | "[record-btrace] " msg "\n", ##args); \ | |
99 | } \ | |
100 | while (0) | |
101 | ||
102 | ||
103 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 104 | thread_info. |
afedecd3 MM |
105 | |
106 | Throws an error if there is no thread or no trace. This function never | |
107 | returns NULL. */ | |
108 | ||
066ce621 MM |
109 | static struct thread_info * |
110 | require_btrace_thread (void) | |
afedecd3 MM |
111 | { |
112 | struct thread_info *tp; | |
afedecd3 MM |
113 | |
114 | DEBUG ("require"); | |
115 | ||
116 | tp = find_thread_ptid (inferior_ptid); | |
117 | if (tp == NULL) | |
118 | error (_("No thread.")); | |
119 | ||
cd4007e4 MM |
120 | validate_registers_access (); |
121 | ||
afedecd3 MM |
122 | btrace_fetch (tp); |
123 | ||
6e07b1d2 | 124 | if (btrace_is_empty (tp)) |
afedecd3 MM |
125 | error (_("No trace.")); |
126 | ||
066ce621 MM |
127 | return tp; |
128 | } | |
129 | ||
130 | /* Update the branch trace for the current thread and return a pointer to its | |
131 | branch trace information struct. | |
132 | ||
133 | Throws an error if there is no thread or no trace. This function never | |
134 | returns NULL. */ | |
135 | ||
136 | static struct btrace_thread_info * | |
137 | require_btrace (void) | |
138 | { | |
139 | struct thread_info *tp; | |
140 | ||
141 | tp = require_btrace_thread (); | |
142 | ||
143 | return &tp->btrace; | |
afedecd3 MM |
144 | } |
145 | ||
146 | /* Enable branch tracing for one thread. Warn on errors. */ | |
147 | ||
148 | static void | |
149 | record_btrace_enable_warn (struct thread_info *tp) | |
150 | { | |
492d29ea PA |
151 | TRY |
152 | { | |
153 | btrace_enable (tp, &record_btrace_conf); | |
154 | } | |
155 | CATCH (error, RETURN_MASK_ERROR) | |
156 | { | |
157 | warning ("%s", error.message); | |
158 | } | |
159 | END_CATCH | |
afedecd3 MM |
160 | } |
161 | ||
afedecd3 MM |
162 | /* Enable automatic tracing of new threads. */ |
163 | ||
164 | static void | |
165 | record_btrace_auto_enable (void) | |
166 | { | |
167 | DEBUG ("attach thread observer"); | |
168 | ||
169 | record_btrace_thread_observer | |
170 | = observer_attach_new_thread (record_btrace_enable_warn); | |
171 | } | |
172 | ||
173 | /* Disable automatic tracing of new threads. */ | |
174 | ||
175 | static void | |
176 | record_btrace_auto_disable (void) | |
177 | { | |
178 | /* The observer may have been detached, already. */ | |
179 | if (record_btrace_thread_observer == NULL) | |
180 | return; | |
181 | ||
182 | DEBUG ("detach thread observer"); | |
183 | ||
184 | observer_detach_new_thread (record_btrace_thread_observer); | |
185 | record_btrace_thread_observer = NULL; | |
186 | } | |
187 | ||
70ad5bff MM |
188 | /* The record-btrace async event handler function. */ |
189 | ||
190 | static void | |
191 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
192 | { | |
193 | inferior_event_handler (INF_REG_EVENT, NULL); | |
194 | } | |
195 | ||
c0272db5 TW |
196 | /* See record-btrace.h. */ |
197 | ||
198 | void | |
199 | record_btrace_push_target (void) | |
200 | { | |
201 | const char *format; | |
202 | ||
203 | record_btrace_auto_enable (); | |
204 | ||
205 | push_target (&record_btrace_ops); | |
206 | ||
207 | record_btrace_async_inferior_event_handler | |
208 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
209 | NULL); | |
210 | record_btrace_generating_corefile = 0; | |
211 | ||
212 | format = btrace_format_short_string (record_btrace_conf.format); | |
213 | observer_notify_record_changed (current_inferior (), 1, "btrace", format); | |
214 | } | |
215 | ||
228f1508 SM |
216 | /* Disable btrace on a set of threads on scope exit. */ |
217 | ||
218 | struct scoped_btrace_disable | |
219 | { | |
220 | scoped_btrace_disable () = default; | |
221 | ||
222 | DISABLE_COPY_AND_ASSIGN (scoped_btrace_disable); | |
223 | ||
224 | ~scoped_btrace_disable () | |
225 | { | |
226 | for (thread_info *tp : m_threads) | |
227 | btrace_disable (tp); | |
228 | } | |
229 | ||
230 | void add_thread (thread_info *thread) | |
231 | { | |
232 | m_threads.push_front (thread); | |
233 | } | |
234 | ||
235 | void discard () | |
236 | { | |
237 | m_threads.clear (); | |
238 | } | |
239 | ||
240 | private: | |
241 | std::forward_list<thread_info *> m_threads; | |
242 | }; | |
243 | ||
afedecd3 MM |
244 | /* The to_open method of target record-btrace. */ |
245 | ||
246 | static void | |
014f9477 | 247 | record_btrace_open (const char *args, int from_tty) |
afedecd3 | 248 | { |
228f1508 SM |
249 | /* If we fail to enable btrace for one thread, disable it for the threads for |
250 | which it was successfully enabled. */ | |
251 | scoped_btrace_disable btrace_disable; | |
afedecd3 MM |
252 | struct thread_info *tp; |
253 | ||
254 | DEBUG ("open"); | |
255 | ||
8213266a | 256 | record_preopen (); |
afedecd3 MM |
257 | |
258 | if (!target_has_execution) | |
259 | error (_("The program is not being run.")); | |
260 | ||
afedecd3 MM |
261 | gdb_assert (record_btrace_thread_observer == NULL); |
262 | ||
034f788c | 263 | ALL_NON_EXITED_THREADS (tp) |
5d5658a1 | 264 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num)) |
afedecd3 | 265 | { |
f4abbc16 | 266 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 | 267 | |
228f1508 | 268 | btrace_disable.add_thread (tp); |
afedecd3 MM |
269 | } |
270 | ||
c0272db5 | 271 | record_btrace_push_target (); |
afedecd3 | 272 | |
228f1508 | 273 | btrace_disable.discard (); |
afedecd3 MM |
274 | } |
275 | ||
276 | /* The to_stop_recording method of target record-btrace. */ | |
277 | ||
278 | static void | |
c6cd7c02 | 279 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
280 | { |
281 | struct thread_info *tp; | |
282 | ||
283 | DEBUG ("stop recording"); | |
284 | ||
285 | record_btrace_auto_disable (); | |
286 | ||
034f788c | 287 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
288 | if (tp->btrace.target != NULL) |
289 | btrace_disable (tp); | |
290 | } | |
291 | ||
c0272db5 TW |
292 | /* The to_disconnect method of target record-btrace. */ |
293 | ||
294 | static void | |
295 | record_btrace_disconnect (struct target_ops *self, const char *args, | |
296 | int from_tty) | |
297 | { | |
298 | struct target_ops *beneath = self->beneath; | |
299 | ||
300 | /* Do not stop recording, just clean up GDB side. */ | |
301 | unpush_target (self); | |
302 | ||
303 | /* Forward disconnect. */ | |
304 | beneath->to_disconnect (beneath, args, from_tty); | |
305 | } | |
306 | ||
afedecd3 MM |
307 | /* The to_close method of target record-btrace. */ |
308 | ||
309 | static void | |
de90e03d | 310 | record_btrace_close (struct target_ops *self) |
afedecd3 | 311 | { |
568e808b MM |
312 | struct thread_info *tp; |
313 | ||
70ad5bff MM |
314 | if (record_btrace_async_inferior_event_handler != NULL) |
315 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
316 | ||
99c819ee MM |
317 | /* Make sure automatic recording gets disabled even if we did not stop |
318 | recording before closing the record-btrace target. */ | |
319 | record_btrace_auto_disable (); | |
320 | ||
568e808b MM |
321 | /* We should have already stopped recording. |
322 | Tear down btrace in case we have not. */ | |
034f788c | 323 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 324 | btrace_teardown (tp); |
afedecd3 MM |
325 | } |
326 | ||
b7d2e916 PA |
327 | /* The to_async method of target record-btrace. */ |
328 | ||
329 | static void | |
6a3753b3 | 330 | record_btrace_async (struct target_ops *ops, int enable) |
b7d2e916 | 331 | { |
6a3753b3 | 332 | if (enable) |
b7d2e916 PA |
333 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
334 | else | |
335 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
336 | ||
6a3753b3 | 337 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
338 | } |
339 | ||
d33501a5 MM |
340 | /* Adjusts the size and returns a human readable size suffix. */ |
341 | ||
342 | static const char * | |
343 | record_btrace_adjust_size (unsigned int *size) | |
344 | { | |
345 | unsigned int sz; | |
346 | ||
347 | sz = *size; | |
348 | ||
349 | if ((sz & ((1u << 30) - 1)) == 0) | |
350 | { | |
351 | *size = sz >> 30; | |
352 | return "GB"; | |
353 | } | |
354 | else if ((sz & ((1u << 20) - 1)) == 0) | |
355 | { | |
356 | *size = sz >> 20; | |
357 | return "MB"; | |
358 | } | |
359 | else if ((sz & ((1u << 10) - 1)) == 0) | |
360 | { | |
361 | *size = sz >> 10; | |
362 | return "kB"; | |
363 | } | |
364 | else | |
365 | return ""; | |
366 | } | |
367 | ||
368 | /* Print a BTS configuration. */ | |
369 | ||
370 | static void | |
371 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
372 | { | |
373 | const char *suffix; | |
374 | unsigned int size; | |
375 | ||
376 | size = conf->size; | |
377 | if (size > 0) | |
378 | { | |
379 | suffix = record_btrace_adjust_size (&size); | |
380 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
381 | } | |
382 | } | |
383 | ||
bc504a31 | 384 | /* Print an Intel Processor Trace configuration. */ |
b20a6524 MM |
385 | |
386 | static void | |
387 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
388 | { | |
389 | const char *suffix; | |
390 | unsigned int size; | |
391 | ||
392 | size = conf->size; | |
393 | if (size > 0) | |
394 | { | |
395 | suffix = record_btrace_adjust_size (&size); | |
396 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
397 | } | |
398 | } | |
399 | ||
d33501a5 MM |
400 | /* Print a branch tracing configuration. */ |
401 | ||
402 | static void | |
403 | record_btrace_print_conf (const struct btrace_config *conf) | |
404 | { | |
405 | printf_unfiltered (_("Recording format: %s.\n"), | |
406 | btrace_format_string (conf->format)); | |
407 | ||
408 | switch (conf->format) | |
409 | { | |
410 | case BTRACE_FORMAT_NONE: | |
411 | return; | |
412 | ||
413 | case BTRACE_FORMAT_BTS: | |
414 | record_btrace_print_bts_conf (&conf->bts); | |
415 | return; | |
b20a6524 MM |
416 | |
417 | case BTRACE_FORMAT_PT: | |
418 | record_btrace_print_pt_conf (&conf->pt); | |
419 | return; | |
d33501a5 MM |
420 | } |
421 | ||
422 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
423 | } | |
424 | ||
afedecd3 MM |
425 | /* The to_info_record method of target record-btrace. */ |
426 | ||
427 | static void | |
630d6a4a | 428 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
429 | { |
430 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 431 | const struct btrace_config *conf; |
afedecd3 | 432 | struct thread_info *tp; |
31fd9caa | 433 | unsigned int insns, calls, gaps; |
afedecd3 MM |
434 | |
435 | DEBUG ("info"); | |
436 | ||
437 | tp = find_thread_ptid (inferior_ptid); | |
438 | if (tp == NULL) | |
439 | error (_("No thread.")); | |
440 | ||
cd4007e4 MM |
441 | validate_registers_access (); |
442 | ||
f4abbc16 MM |
443 | btinfo = &tp->btrace; |
444 | ||
445 | conf = btrace_conf (btinfo); | |
446 | if (conf != NULL) | |
d33501a5 | 447 | record_btrace_print_conf (conf); |
f4abbc16 | 448 | |
afedecd3 MM |
449 | btrace_fetch (tp); |
450 | ||
23a7fe75 MM |
451 | insns = 0; |
452 | calls = 0; | |
31fd9caa | 453 | gaps = 0; |
23a7fe75 | 454 | |
6e07b1d2 | 455 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
456 | { |
457 | struct btrace_call_iterator call; | |
458 | struct btrace_insn_iterator insn; | |
459 | ||
460 | btrace_call_end (&call, btinfo); | |
461 | btrace_call_prev (&call, 1); | |
5de9129b | 462 | calls = btrace_call_number (&call); |
23a7fe75 MM |
463 | |
464 | btrace_insn_end (&insn, btinfo); | |
5de9129b | 465 | insns = btrace_insn_number (&insn); |
31fd9caa | 466 | |
69090cee TW |
467 | /* If the last instruction is not a gap, it is the current instruction |
468 | that is not actually part of the record. */ | |
469 | if (btrace_insn_get (&insn) != NULL) | |
470 | insns -= 1; | |
31fd9caa MM |
471 | |
472 | gaps = btinfo->ngaps; | |
23a7fe75 | 473 | } |
afedecd3 | 474 | |
31fd9caa | 475 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
43792cf0 PA |
476 | "for thread %s (%s).\n"), insns, calls, gaps, |
477 | print_thread_id (tp), target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
478 | |
479 | if (btrace_is_replaying (tp)) | |
480 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
481 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
482 | } |
483 | ||
31fd9caa MM |
484 | /* Print a decode error. */ |
485 | ||
486 | static void | |
487 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
488 | enum btrace_format format) | |
489 | { | |
508352a9 | 490 | const char *errstr = btrace_decode_error (format, errcode); |
31fd9caa | 491 | |
112e8700 | 492 | uiout->text (_("[")); |
508352a9 TW |
493 | /* ERRCODE > 0 indicates notifications on BTRACE_FORMAT_PT. */ |
494 | if (!(format == BTRACE_FORMAT_PT && errcode > 0)) | |
31fd9caa | 495 | { |
112e8700 SM |
496 | uiout->text (_("decode error (")); |
497 | uiout->field_int ("errcode", errcode); | |
498 | uiout->text (_("): ")); | |
31fd9caa | 499 | } |
112e8700 SM |
500 | uiout->text (errstr); |
501 | uiout->text (_("]\n")); | |
31fd9caa MM |
502 | } |
503 | ||
afedecd3 MM |
504 | /* Print an unsigned int. */ |
505 | ||
506 | static void | |
507 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
508 | { | |
112e8700 | 509 | uiout->field_fmt (fld, "%u", val); |
afedecd3 MM |
510 | } |
511 | ||
f94cc897 MM |
512 | /* A range of source lines. */ |
513 | ||
514 | struct btrace_line_range | |
515 | { | |
516 | /* The symtab this line is from. */ | |
517 | struct symtab *symtab; | |
518 | ||
519 | /* The first line (inclusive). */ | |
520 | int begin; | |
521 | ||
522 | /* The last line (exclusive). */ | |
523 | int end; | |
524 | }; | |
525 | ||
526 | /* Construct a line range. */ | |
527 | ||
528 | static struct btrace_line_range | |
529 | btrace_mk_line_range (struct symtab *symtab, int begin, int end) | |
530 | { | |
531 | struct btrace_line_range range; | |
532 | ||
533 | range.symtab = symtab; | |
534 | range.begin = begin; | |
535 | range.end = end; | |
536 | ||
537 | return range; | |
538 | } | |
539 | ||
540 | /* Add a line to a line range. */ | |
541 | ||
542 | static struct btrace_line_range | |
543 | btrace_line_range_add (struct btrace_line_range range, int line) | |
544 | { | |
545 | if (range.end <= range.begin) | |
546 | { | |
547 | /* This is the first entry. */ | |
548 | range.begin = line; | |
549 | range.end = line + 1; | |
550 | } | |
551 | else if (line < range.begin) | |
552 | range.begin = line; | |
553 | else if (range.end < line) | |
554 | range.end = line; | |
555 | ||
556 | return range; | |
557 | } | |
558 | ||
559 | /* Return non-zero if RANGE is empty, zero otherwise. */ | |
560 | ||
561 | static int | |
562 | btrace_line_range_is_empty (struct btrace_line_range range) | |
563 | { | |
564 | return range.end <= range.begin; | |
565 | } | |
566 | ||
567 | /* Return non-zero if LHS contains RHS, zero otherwise. */ | |
568 | ||
569 | static int | |
570 | btrace_line_range_contains_range (struct btrace_line_range lhs, | |
571 | struct btrace_line_range rhs) | |
572 | { | |
573 | return ((lhs.symtab == rhs.symtab) | |
574 | && (lhs.begin <= rhs.begin) | |
575 | && (rhs.end <= lhs.end)); | |
576 | } | |
577 | ||
578 | /* Find the line range associated with PC. */ | |
579 | ||
580 | static struct btrace_line_range | |
581 | btrace_find_line_range (CORE_ADDR pc) | |
582 | { | |
583 | struct btrace_line_range range; | |
584 | struct linetable_entry *lines; | |
585 | struct linetable *ltable; | |
586 | struct symtab *symtab; | |
587 | int nlines, i; | |
588 | ||
589 | symtab = find_pc_line_symtab (pc); | |
590 | if (symtab == NULL) | |
591 | return btrace_mk_line_range (NULL, 0, 0); | |
592 | ||
593 | ltable = SYMTAB_LINETABLE (symtab); | |
594 | if (ltable == NULL) | |
595 | return btrace_mk_line_range (symtab, 0, 0); | |
596 | ||
597 | nlines = ltable->nitems; | |
598 | lines = ltable->item; | |
599 | if (nlines <= 0) | |
600 | return btrace_mk_line_range (symtab, 0, 0); | |
601 | ||
602 | range = btrace_mk_line_range (symtab, 0, 0); | |
603 | for (i = 0; i < nlines - 1; i++) | |
604 | { | |
605 | if ((lines[i].pc == pc) && (lines[i].line != 0)) | |
606 | range = btrace_line_range_add (range, lines[i].line); | |
607 | } | |
608 | ||
609 | return range; | |
610 | } | |
611 | ||
612 | /* Print source lines in LINES to UIOUT. | |
613 | ||
614 | UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
615 | instructions corresponding to that source line. When printing a new source | |
616 | line, we do the cleanups for the open chain and open a new cleanup chain for | |
617 | the new source line. If the source line range in LINES is not empty, this | |
618 | function will leave the cleanup chain for the last printed source line open | |
619 | so instructions can be added to it. */ | |
620 | ||
621 | static void | |
622 | btrace_print_lines (struct btrace_line_range lines, struct ui_out *uiout, | |
3dea1ef7 | 623 | struct cleanup **ui_item_chain, gdb_disassembly_flags flags) |
f94cc897 | 624 | { |
8d297bbf | 625 | print_source_lines_flags psl_flags; |
f94cc897 MM |
626 | int line; |
627 | ||
628 | psl_flags = 0; | |
629 | if (flags & DISASSEMBLY_FILENAME) | |
630 | psl_flags |= PRINT_SOURCE_LINES_FILENAME; | |
631 | ||
632 | for (line = lines.begin; line < lines.end; ++line) | |
633 | { | |
634 | if (*ui_item_chain != NULL) | |
635 | do_cleanups (*ui_item_chain); | |
636 | ||
637 | *ui_item_chain | |
638 | = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); | |
639 | ||
640 | print_source_lines (lines.symtab, line, line + 1, psl_flags); | |
641 | ||
642 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
643 | } | |
644 | } | |
645 | ||
afedecd3 MM |
646 | /* Disassemble a section of the recorded instruction trace. */ |
647 | ||
648 | static void | |
23a7fe75 | 649 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 650 | const struct btrace_thread_info *btinfo, |
23a7fe75 | 651 | const struct btrace_insn_iterator *begin, |
9a24775b PA |
652 | const struct btrace_insn_iterator *end, |
653 | gdb_disassembly_flags flags) | |
afedecd3 | 654 | { |
f94cc897 | 655 | struct cleanup *cleanups, *ui_item_chain; |
afedecd3 | 656 | struct gdbarch *gdbarch; |
23a7fe75 | 657 | struct btrace_insn_iterator it; |
f94cc897 | 658 | struct btrace_line_range last_lines; |
afedecd3 | 659 | |
9a24775b PA |
660 | DEBUG ("itrace (0x%x): [%u; %u)", (unsigned) flags, |
661 | btrace_insn_number (begin), btrace_insn_number (end)); | |
afedecd3 | 662 | |
f94cc897 MM |
663 | flags |= DISASSEMBLY_SPECULATIVE; |
664 | ||
afedecd3 | 665 | gdbarch = target_gdbarch (); |
f94cc897 MM |
666 | last_lines = btrace_mk_line_range (NULL, 0, 0); |
667 | ||
187808b0 | 668 | cleanups = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
f94cc897 MM |
669 | |
670 | /* UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
671 | instructions corresponding to that line. */ | |
672 | ui_item_chain = NULL; | |
afedecd3 | 673 | |
8b172ce7 PA |
674 | gdb_pretty_print_disassembler disasm (gdbarch); |
675 | ||
23a7fe75 | 676 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 677 | { |
23a7fe75 MM |
678 | const struct btrace_insn *insn; |
679 | ||
680 | insn = btrace_insn_get (&it); | |
681 | ||
31fd9caa MM |
682 | /* A NULL instruction indicates a gap in the trace. */ |
683 | if (insn == NULL) | |
684 | { | |
685 | const struct btrace_config *conf; | |
686 | ||
687 | conf = btrace_conf (btinfo); | |
afedecd3 | 688 | |
31fd9caa MM |
689 | /* We have trace so we must have a configuration. */ |
690 | gdb_assert (conf != NULL); | |
691 | ||
69090cee TW |
692 | uiout->field_fmt ("insn-number", "%u", |
693 | btrace_insn_number (&it)); | |
694 | uiout->text ("\t"); | |
695 | ||
696 | btrace_ui_out_decode_error (uiout, btrace_insn_get_error (&it), | |
31fd9caa MM |
697 | conf->format); |
698 | } | |
699 | else | |
700 | { | |
f94cc897 | 701 | struct disasm_insn dinsn; |
da8c46d2 | 702 | |
f94cc897 | 703 | if ((flags & DISASSEMBLY_SOURCE) != 0) |
da8c46d2 | 704 | { |
f94cc897 MM |
705 | struct btrace_line_range lines; |
706 | ||
707 | lines = btrace_find_line_range (insn->pc); | |
708 | if (!btrace_line_range_is_empty (lines) | |
709 | && !btrace_line_range_contains_range (last_lines, lines)) | |
710 | { | |
711 | btrace_print_lines (lines, uiout, &ui_item_chain, flags); | |
712 | last_lines = lines; | |
713 | } | |
714 | else if (ui_item_chain == NULL) | |
715 | { | |
716 | ui_item_chain | |
717 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
718 | "src_and_asm_line"); | |
719 | /* No source information. */ | |
720 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
721 | } | |
722 | ||
723 | gdb_assert (ui_item_chain != NULL); | |
da8c46d2 | 724 | } |
da8c46d2 | 725 | |
f94cc897 MM |
726 | memset (&dinsn, 0, sizeof (dinsn)); |
727 | dinsn.number = btrace_insn_number (&it); | |
728 | dinsn.addr = insn->pc; | |
31fd9caa | 729 | |
da8c46d2 | 730 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) |
f94cc897 | 731 | dinsn.is_speculative = 1; |
da8c46d2 | 732 | |
8b172ce7 | 733 | disasm.pretty_print_insn (uiout, &dinsn, flags); |
31fd9caa | 734 | } |
afedecd3 | 735 | } |
f94cc897 MM |
736 | |
737 | do_cleanups (cleanups); | |
afedecd3 MM |
738 | } |
739 | ||
740 | /* The to_insn_history method of target record-btrace. */ | |
741 | ||
742 | static void | |
9a24775b PA |
743 | record_btrace_insn_history (struct target_ops *self, int size, |
744 | gdb_disassembly_flags flags) | |
afedecd3 MM |
745 | { |
746 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
747 | struct btrace_insn_history *history; |
748 | struct btrace_insn_iterator begin, end; | |
afedecd3 | 749 | struct ui_out *uiout; |
23a7fe75 | 750 | unsigned int context, covered; |
afedecd3 MM |
751 | |
752 | uiout = current_uiout; | |
2e783024 | 753 | ui_out_emit_tuple tuple_emitter (uiout, "insn history"); |
afedecd3 | 754 | context = abs (size); |
afedecd3 MM |
755 | if (context == 0) |
756 | error (_("Bad record instruction-history-size.")); | |
757 | ||
23a7fe75 MM |
758 | btinfo = require_btrace (); |
759 | history = btinfo->insn_history; | |
760 | if (history == NULL) | |
afedecd3 | 761 | { |
07bbe694 | 762 | struct btrace_insn_iterator *replay; |
afedecd3 | 763 | |
9a24775b | 764 | DEBUG ("insn-history (0x%x): %d", (unsigned) flags, size); |
afedecd3 | 765 | |
07bbe694 MM |
766 | /* If we're replaying, we start at the replay position. Otherwise, we |
767 | start at the tail of the trace. */ | |
768 | replay = btinfo->replay; | |
769 | if (replay != NULL) | |
770 | begin = *replay; | |
771 | else | |
772 | btrace_insn_end (&begin, btinfo); | |
773 | ||
774 | /* We start from here and expand in the requested direction. Then we | |
775 | expand in the other direction, as well, to fill up any remaining | |
776 | context. */ | |
777 | end = begin; | |
778 | if (size < 0) | |
779 | { | |
780 | /* We want the current position covered, as well. */ | |
781 | covered = btrace_insn_next (&end, 1); | |
782 | covered += btrace_insn_prev (&begin, context - covered); | |
783 | covered += btrace_insn_next (&end, context - covered); | |
784 | } | |
785 | else | |
786 | { | |
787 | covered = btrace_insn_next (&end, context); | |
788 | covered += btrace_insn_prev (&begin, context - covered); | |
789 | } | |
afedecd3 MM |
790 | } |
791 | else | |
792 | { | |
23a7fe75 MM |
793 | begin = history->begin; |
794 | end = history->end; | |
afedecd3 | 795 | |
9a24775b | 796 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", (unsigned) flags, size, |
23a7fe75 | 797 | btrace_insn_number (&begin), btrace_insn_number (&end)); |
afedecd3 | 798 | |
23a7fe75 MM |
799 | if (size < 0) |
800 | { | |
801 | end = begin; | |
802 | covered = btrace_insn_prev (&begin, context); | |
803 | } | |
804 | else | |
805 | { | |
806 | begin = end; | |
807 | covered = btrace_insn_next (&end, context); | |
808 | } | |
afedecd3 MM |
809 | } |
810 | ||
23a7fe75 | 811 | if (covered > 0) |
31fd9caa | 812 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
813 | else |
814 | { | |
815 | if (size < 0) | |
816 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
817 | else | |
818 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
819 | } | |
afedecd3 | 820 | |
23a7fe75 | 821 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
822 | } |
823 | ||
824 | /* The to_insn_history_range method of target record-btrace. */ | |
825 | ||
826 | static void | |
4e99c6b7 | 827 | record_btrace_insn_history_range (struct target_ops *self, |
9a24775b PA |
828 | ULONGEST from, ULONGEST to, |
829 | gdb_disassembly_flags flags) | |
afedecd3 MM |
830 | { |
831 | struct btrace_thread_info *btinfo; | |
23a7fe75 | 832 | struct btrace_insn_iterator begin, end; |
afedecd3 | 833 | struct ui_out *uiout; |
23a7fe75 MM |
834 | unsigned int low, high; |
835 | int found; | |
afedecd3 MM |
836 | |
837 | uiout = current_uiout; | |
2e783024 | 838 | ui_out_emit_tuple tuple_emitter (uiout, "insn history"); |
23a7fe75 MM |
839 | low = from; |
840 | high = to; | |
afedecd3 | 841 | |
9a24775b | 842 | DEBUG ("insn-history (0x%x): [%u; %u)", (unsigned) flags, low, high); |
afedecd3 MM |
843 | |
844 | /* Check for wrap-arounds. */ | |
23a7fe75 | 845 | if (low != from || high != to) |
afedecd3 MM |
846 | error (_("Bad range.")); |
847 | ||
0688d04e | 848 | if (high < low) |
afedecd3 MM |
849 | error (_("Bad range.")); |
850 | ||
23a7fe75 | 851 | btinfo = require_btrace (); |
afedecd3 | 852 | |
23a7fe75 MM |
853 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
854 | if (found == 0) | |
855 | error (_("Range out of bounds.")); | |
afedecd3 | 856 | |
23a7fe75 MM |
857 | found = btrace_find_insn_by_number (&end, btinfo, high); |
858 | if (found == 0) | |
0688d04e MM |
859 | { |
860 | /* Silently truncate the range. */ | |
861 | btrace_insn_end (&end, btinfo); | |
862 | } | |
863 | else | |
864 | { | |
865 | /* We want both begin and end to be inclusive. */ | |
866 | btrace_insn_next (&end, 1); | |
867 | } | |
afedecd3 | 868 | |
31fd9caa | 869 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 870 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
871 | } |
872 | ||
873 | /* The to_insn_history_from method of target record-btrace. */ | |
874 | ||
875 | static void | |
9abc3ff3 | 876 | record_btrace_insn_history_from (struct target_ops *self, |
9a24775b PA |
877 | ULONGEST from, int size, |
878 | gdb_disassembly_flags flags) | |
afedecd3 MM |
879 | { |
880 | ULONGEST begin, end, context; | |
881 | ||
882 | context = abs (size); | |
0688d04e MM |
883 | if (context == 0) |
884 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
885 | |
886 | if (size < 0) | |
887 | { | |
888 | end = from; | |
889 | ||
890 | if (from < context) | |
891 | begin = 0; | |
892 | else | |
0688d04e | 893 | begin = from - context + 1; |
afedecd3 MM |
894 | } |
895 | else | |
896 | { | |
897 | begin = from; | |
0688d04e | 898 | end = from + context - 1; |
afedecd3 MM |
899 | |
900 | /* Check for wrap-around. */ | |
901 | if (end < begin) | |
902 | end = ULONGEST_MAX; | |
903 | } | |
904 | ||
4e99c6b7 | 905 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
906 | } |
907 | ||
908 | /* Print the instruction number range for a function call history line. */ | |
909 | ||
910 | static void | |
23a7fe75 MM |
911 | btrace_call_history_insn_range (struct ui_out *uiout, |
912 | const struct btrace_function *bfun) | |
afedecd3 | 913 | { |
7acbe133 MM |
914 | unsigned int begin, end, size; |
915 | ||
0860c437 | 916 | size = bfun->insn.size (); |
7acbe133 | 917 | gdb_assert (size > 0); |
afedecd3 | 918 | |
23a7fe75 | 919 | begin = bfun->insn_offset; |
7acbe133 | 920 | end = begin + size - 1; |
afedecd3 | 921 | |
23a7fe75 | 922 | ui_out_field_uint (uiout, "insn begin", begin); |
112e8700 | 923 | uiout->text (","); |
23a7fe75 | 924 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
925 | } |
926 | ||
ce0dfbea MM |
927 | /* Compute the lowest and highest source line for the instructions in BFUN |
928 | and return them in PBEGIN and PEND. | |
929 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
930 | result from inlining or macro expansion. */ | |
931 | ||
932 | static void | |
933 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
934 | int *pbegin, int *pend) | |
935 | { | |
ce0dfbea MM |
936 | struct symtab *symtab; |
937 | struct symbol *sym; | |
ce0dfbea MM |
938 | int begin, end; |
939 | ||
940 | begin = INT_MAX; | |
941 | end = INT_MIN; | |
942 | ||
943 | sym = bfun->sym; | |
944 | if (sym == NULL) | |
945 | goto out; | |
946 | ||
947 | symtab = symbol_symtab (sym); | |
948 | ||
0860c437 | 949 | for (const btrace_insn &insn : bfun->insn) |
ce0dfbea MM |
950 | { |
951 | struct symtab_and_line sal; | |
952 | ||
0860c437 | 953 | sal = find_pc_line (insn.pc, 0); |
ce0dfbea MM |
954 | if (sal.symtab != symtab || sal.line == 0) |
955 | continue; | |
956 | ||
325fac50 PA |
957 | begin = std::min (begin, sal.line); |
958 | end = std::max (end, sal.line); | |
ce0dfbea MM |
959 | } |
960 | ||
961 | out: | |
962 | *pbegin = begin; | |
963 | *pend = end; | |
964 | } | |
965 | ||
afedecd3 MM |
966 | /* Print the source line information for a function call history line. */ |
967 | ||
968 | static void | |
23a7fe75 MM |
969 | btrace_call_history_src_line (struct ui_out *uiout, |
970 | const struct btrace_function *bfun) | |
afedecd3 MM |
971 | { |
972 | struct symbol *sym; | |
23a7fe75 | 973 | int begin, end; |
afedecd3 MM |
974 | |
975 | sym = bfun->sym; | |
976 | if (sym == NULL) | |
977 | return; | |
978 | ||
112e8700 | 979 | uiout->field_string ("file", |
08be3fe3 | 980 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 981 | |
ce0dfbea | 982 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 983 | if (end < begin) |
afedecd3 MM |
984 | return; |
985 | ||
112e8700 SM |
986 | uiout->text (":"); |
987 | uiout->field_int ("min line", begin); | |
afedecd3 | 988 | |
23a7fe75 | 989 | if (end == begin) |
afedecd3 MM |
990 | return; |
991 | ||
112e8700 SM |
992 | uiout->text (","); |
993 | uiout->field_int ("max line", end); | |
afedecd3 MM |
994 | } |
995 | ||
0b722aec MM |
996 | /* Get the name of a branch trace function. */ |
997 | ||
998 | static const char * | |
999 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
1000 | { | |
1001 | struct minimal_symbol *msym; | |
1002 | struct symbol *sym; | |
1003 | ||
1004 | if (bfun == NULL) | |
1005 | return "??"; | |
1006 | ||
1007 | msym = bfun->msym; | |
1008 | sym = bfun->sym; | |
1009 | ||
1010 | if (sym != NULL) | |
1011 | return SYMBOL_PRINT_NAME (sym); | |
1012 | else if (msym != NULL) | |
efd66ac6 | 1013 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
1014 | else |
1015 | return "??"; | |
1016 | } | |
1017 | ||
afedecd3 MM |
1018 | /* Disassemble a section of the recorded function trace. */ |
1019 | ||
1020 | static void | |
23a7fe75 | 1021 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 1022 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
1023 | const struct btrace_call_iterator *begin, |
1024 | const struct btrace_call_iterator *end, | |
8d297bbf | 1025 | int int_flags) |
afedecd3 | 1026 | { |
23a7fe75 | 1027 | struct btrace_call_iterator it; |
8d297bbf | 1028 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 | 1029 | |
8d297bbf | 1030 | DEBUG ("ftrace (0x%x): [%u; %u)", int_flags, btrace_call_number (begin), |
23a7fe75 | 1031 | btrace_call_number (end)); |
afedecd3 | 1032 | |
23a7fe75 | 1033 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 1034 | { |
23a7fe75 MM |
1035 | const struct btrace_function *bfun; |
1036 | struct minimal_symbol *msym; | |
1037 | struct symbol *sym; | |
1038 | ||
1039 | bfun = btrace_call_get (&it); | |
23a7fe75 | 1040 | sym = bfun->sym; |
0b722aec | 1041 | msym = bfun->msym; |
23a7fe75 | 1042 | |
afedecd3 | 1043 | /* Print the function index. */ |
23a7fe75 | 1044 | ui_out_field_uint (uiout, "index", bfun->number); |
112e8700 | 1045 | uiout->text ("\t"); |
afedecd3 | 1046 | |
31fd9caa MM |
1047 | /* Indicate gaps in the trace. */ |
1048 | if (bfun->errcode != 0) | |
1049 | { | |
1050 | const struct btrace_config *conf; | |
1051 | ||
1052 | conf = btrace_conf (btinfo); | |
1053 | ||
1054 | /* We have trace so we must have a configuration. */ | |
1055 | gdb_assert (conf != NULL); | |
1056 | ||
1057 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
1058 | ||
1059 | continue; | |
1060 | } | |
1061 | ||
8710b709 MM |
1062 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
1063 | { | |
1064 | int level = bfun->level + btinfo->level, i; | |
1065 | ||
1066 | for (i = 0; i < level; ++i) | |
112e8700 | 1067 | uiout->text (" "); |
8710b709 MM |
1068 | } |
1069 | ||
1070 | if (sym != NULL) | |
112e8700 | 1071 | uiout->field_string ("function", SYMBOL_PRINT_NAME (sym)); |
8710b709 | 1072 | else if (msym != NULL) |
112e8700 SM |
1073 | uiout->field_string ("function", MSYMBOL_PRINT_NAME (msym)); |
1074 | else if (!uiout->is_mi_like_p ()) | |
1075 | uiout->field_string ("function", "??"); | |
8710b709 | 1076 | |
1e038f67 | 1077 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 1078 | { |
112e8700 | 1079 | uiout->text (_("\tinst ")); |
23a7fe75 | 1080 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
1081 | } |
1082 | ||
1e038f67 | 1083 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 1084 | { |
112e8700 | 1085 | uiout->text (_("\tat ")); |
23a7fe75 | 1086 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
1087 | } |
1088 | ||
112e8700 | 1089 | uiout->text ("\n"); |
afedecd3 MM |
1090 | } |
1091 | } | |
1092 | ||
1093 | /* The to_call_history method of target record-btrace. */ | |
1094 | ||
1095 | static void | |
0cb7c7b0 SM |
1096 | record_btrace_call_history (struct target_ops *self, int size, |
1097 | record_print_flags flags) | |
afedecd3 MM |
1098 | { |
1099 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1100 | struct btrace_call_history *history; |
1101 | struct btrace_call_iterator begin, end; | |
afedecd3 | 1102 | struct ui_out *uiout; |
23a7fe75 | 1103 | unsigned int context, covered; |
afedecd3 MM |
1104 | |
1105 | uiout = current_uiout; | |
2e783024 | 1106 | ui_out_emit_tuple tuple_emitter (uiout, "insn history"); |
afedecd3 | 1107 | context = abs (size); |
afedecd3 MM |
1108 | if (context == 0) |
1109 | error (_("Bad record function-call-history-size.")); | |
1110 | ||
23a7fe75 MM |
1111 | btinfo = require_btrace (); |
1112 | history = btinfo->call_history; | |
1113 | if (history == NULL) | |
afedecd3 | 1114 | { |
07bbe694 | 1115 | struct btrace_insn_iterator *replay; |
afedecd3 | 1116 | |
0cb7c7b0 | 1117 | DEBUG ("call-history (0x%x): %d", (int) flags, size); |
afedecd3 | 1118 | |
07bbe694 MM |
1119 | /* If we're replaying, we start at the replay position. Otherwise, we |
1120 | start at the tail of the trace. */ | |
1121 | replay = btinfo->replay; | |
1122 | if (replay != NULL) | |
1123 | { | |
07bbe694 | 1124 | begin.btinfo = btinfo; |
a0f1b963 | 1125 | begin.index = replay->call_index; |
07bbe694 MM |
1126 | } |
1127 | else | |
1128 | btrace_call_end (&begin, btinfo); | |
1129 | ||
1130 | /* We start from here and expand in the requested direction. Then we | |
1131 | expand in the other direction, as well, to fill up any remaining | |
1132 | context. */ | |
1133 | end = begin; | |
1134 | if (size < 0) | |
1135 | { | |
1136 | /* We want the current position covered, as well. */ | |
1137 | covered = btrace_call_next (&end, 1); | |
1138 | covered += btrace_call_prev (&begin, context - covered); | |
1139 | covered += btrace_call_next (&end, context - covered); | |
1140 | } | |
1141 | else | |
1142 | { | |
1143 | covered = btrace_call_next (&end, context); | |
1144 | covered += btrace_call_prev (&begin, context- covered); | |
1145 | } | |
afedecd3 MM |
1146 | } |
1147 | else | |
1148 | { | |
23a7fe75 MM |
1149 | begin = history->begin; |
1150 | end = history->end; | |
afedecd3 | 1151 | |
0cb7c7b0 | 1152 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", (int) flags, size, |
23a7fe75 | 1153 | btrace_call_number (&begin), btrace_call_number (&end)); |
afedecd3 | 1154 | |
23a7fe75 MM |
1155 | if (size < 0) |
1156 | { | |
1157 | end = begin; | |
1158 | covered = btrace_call_prev (&begin, context); | |
1159 | } | |
1160 | else | |
1161 | { | |
1162 | begin = end; | |
1163 | covered = btrace_call_next (&end, context); | |
1164 | } | |
afedecd3 MM |
1165 | } |
1166 | ||
23a7fe75 | 1167 | if (covered > 0) |
8710b709 | 1168 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1169 | else |
1170 | { | |
1171 | if (size < 0) | |
1172 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
1173 | else | |
1174 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
1175 | } | |
afedecd3 | 1176 | |
23a7fe75 | 1177 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1178 | } |
1179 | ||
1180 | /* The to_call_history_range method of target record-btrace. */ | |
1181 | ||
1182 | static void | |
f0d960ea | 1183 | record_btrace_call_history_range (struct target_ops *self, |
8d297bbf | 1184 | ULONGEST from, ULONGEST to, |
0cb7c7b0 | 1185 | record_print_flags flags) |
afedecd3 MM |
1186 | { |
1187 | struct btrace_thread_info *btinfo; | |
23a7fe75 | 1188 | struct btrace_call_iterator begin, end; |
afedecd3 | 1189 | struct ui_out *uiout; |
23a7fe75 MM |
1190 | unsigned int low, high; |
1191 | int found; | |
afedecd3 MM |
1192 | |
1193 | uiout = current_uiout; | |
2e783024 | 1194 | ui_out_emit_tuple tuple_emitter (uiout, "func history"); |
23a7fe75 MM |
1195 | low = from; |
1196 | high = to; | |
afedecd3 | 1197 | |
0cb7c7b0 | 1198 | DEBUG ("call-history (0x%x): [%u; %u)", (int) flags, low, high); |
afedecd3 MM |
1199 | |
1200 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1201 | if (low != from || high != to) |
afedecd3 MM |
1202 | error (_("Bad range.")); |
1203 | ||
0688d04e | 1204 | if (high < low) |
afedecd3 MM |
1205 | error (_("Bad range.")); |
1206 | ||
23a7fe75 | 1207 | btinfo = require_btrace (); |
afedecd3 | 1208 | |
23a7fe75 MM |
1209 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1210 | if (found == 0) | |
1211 | error (_("Range out of bounds.")); | |
afedecd3 | 1212 | |
23a7fe75 MM |
1213 | found = btrace_find_call_by_number (&end, btinfo, high); |
1214 | if (found == 0) | |
0688d04e MM |
1215 | { |
1216 | /* Silently truncate the range. */ | |
1217 | btrace_call_end (&end, btinfo); | |
1218 | } | |
1219 | else | |
1220 | { | |
1221 | /* We want both begin and end to be inclusive. */ | |
1222 | btrace_call_next (&end, 1); | |
1223 | } | |
afedecd3 | 1224 | |
8710b709 | 1225 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1226 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1227 | } |
1228 | ||
1229 | /* The to_call_history_from method of target record-btrace. */ | |
1230 | ||
1231 | static void | |
ec0aea04 | 1232 | record_btrace_call_history_from (struct target_ops *self, |
8d297bbf | 1233 | ULONGEST from, int size, |
0cb7c7b0 | 1234 | record_print_flags flags) |
afedecd3 MM |
1235 | { |
1236 | ULONGEST begin, end, context; | |
1237 | ||
1238 | context = abs (size); | |
0688d04e MM |
1239 | if (context == 0) |
1240 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1241 | |
1242 | if (size < 0) | |
1243 | { | |
1244 | end = from; | |
1245 | ||
1246 | if (from < context) | |
1247 | begin = 0; | |
1248 | else | |
0688d04e | 1249 | begin = from - context + 1; |
afedecd3 MM |
1250 | } |
1251 | else | |
1252 | { | |
1253 | begin = from; | |
0688d04e | 1254 | end = from + context - 1; |
afedecd3 MM |
1255 | |
1256 | /* Check for wrap-around. */ | |
1257 | if (end < begin) | |
1258 | end = ULONGEST_MAX; | |
1259 | } | |
1260 | ||
f0d960ea | 1261 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1262 | } |
1263 | ||
b158a20f TW |
1264 | /* The to_record_method method of target record-btrace. */ |
1265 | ||
1266 | static enum record_method | |
1267 | record_btrace_record_method (struct target_ops *self, ptid_t ptid) | |
1268 | { | |
b158a20f TW |
1269 | struct thread_info * const tp = find_thread_ptid (ptid); |
1270 | ||
1271 | if (tp == NULL) | |
1272 | error (_("No thread.")); | |
1273 | ||
1274 | if (tp->btrace.target == NULL) | |
1275 | return RECORD_METHOD_NONE; | |
1276 | ||
1277 | return RECORD_METHOD_BTRACE; | |
1278 | } | |
1279 | ||
07bbe694 MM |
1280 | /* The to_record_is_replaying method of target record-btrace. */ |
1281 | ||
1282 | static int | |
a52eab48 | 1283 | record_btrace_is_replaying (struct target_ops *self, ptid_t ptid) |
07bbe694 MM |
1284 | { |
1285 | struct thread_info *tp; | |
1286 | ||
034f788c | 1287 | ALL_NON_EXITED_THREADS (tp) |
a52eab48 | 1288 | if (ptid_match (tp->ptid, ptid) && btrace_is_replaying (tp)) |
07bbe694 MM |
1289 | return 1; |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | ||
7ff27e9b MM |
1294 | /* The to_record_will_replay method of target record-btrace. */ |
1295 | ||
1296 | static int | |
1297 | record_btrace_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1298 | { | |
1299 | return dir == EXEC_REVERSE || record_btrace_is_replaying (self, ptid); | |
1300 | } | |
1301 | ||
633785ff MM |
1302 | /* The to_xfer_partial method of target record-btrace. */ |
1303 | ||
9b409511 | 1304 | static enum target_xfer_status |
633785ff MM |
1305 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1306 | const char *annex, gdb_byte *readbuf, | |
1307 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1308 | ULONGEST len, ULONGEST *xfered_len) |
633785ff | 1309 | { |
633785ff | 1310 | /* Filter out requests that don't make sense during replay. */ |
67b5c0c1 | 1311 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1312 | && !record_btrace_generating_corefile |
4d10e986 | 1313 | && record_btrace_is_replaying (ops, inferior_ptid)) |
633785ff MM |
1314 | { |
1315 | switch (object) | |
1316 | { | |
1317 | case TARGET_OBJECT_MEMORY: | |
1318 | { | |
1319 | struct target_section *section; | |
1320 | ||
1321 | /* We do not allow writing memory in general. */ | |
1322 | if (writebuf != NULL) | |
9b409511 YQ |
1323 | { |
1324 | *xfered_len = len; | |
bc113b4e | 1325 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1326 | } |
633785ff MM |
1327 | |
1328 | /* We allow reading readonly memory. */ | |
1329 | section = target_section_by_addr (ops, offset); | |
1330 | if (section != NULL) | |
1331 | { | |
1332 | /* Check if the section we found is readonly. */ | |
1333 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1334 | section->the_bfd_section) | |
1335 | & SEC_READONLY) != 0) | |
1336 | { | |
1337 | /* Truncate the request to fit into this section. */ | |
325fac50 | 1338 | len = std::min (len, section->endaddr - offset); |
633785ff MM |
1339 | break; |
1340 | } | |
1341 | } | |
1342 | ||
9b409511 | 1343 | *xfered_len = len; |
bc113b4e | 1344 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1345 | } |
1346 | } | |
1347 | } | |
1348 | ||
1349 | /* Forward the request. */ | |
e75fdfca TT |
1350 | ops = ops->beneath; |
1351 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1352 | offset, len, xfered_len); | |
633785ff MM |
1353 | } |
1354 | ||
1355 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1356 | ||
1357 | static int | |
1358 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1359 | struct gdbarch *gdbarch, | |
1360 | struct bp_target_info *bp_tgt) | |
1361 | { | |
67b5c0c1 MM |
1362 | const char *old; |
1363 | int ret; | |
633785ff MM |
1364 | |
1365 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1366 | duration of this function. */ | |
67b5c0c1 MM |
1367 | old = replay_memory_access; |
1368 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1369 | |
1370 | ret = 0; | |
492d29ea PA |
1371 | TRY |
1372 | { | |
1373 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1374 | } | |
492d29ea PA |
1375 | CATCH (except, RETURN_MASK_ALL) |
1376 | { | |
6c63c96a | 1377 | replay_memory_access = old; |
492d29ea PA |
1378 | throw_exception (except); |
1379 | } | |
1380 | END_CATCH | |
6c63c96a | 1381 | replay_memory_access = old; |
633785ff MM |
1382 | |
1383 | return ret; | |
1384 | } | |
1385 | ||
1386 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1387 | ||
1388 | static int | |
1389 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1390 | struct gdbarch *gdbarch, | |
73971819 PA |
1391 | struct bp_target_info *bp_tgt, |
1392 | enum remove_bp_reason reason) | |
633785ff | 1393 | { |
67b5c0c1 MM |
1394 | const char *old; |
1395 | int ret; | |
633785ff MM |
1396 | |
1397 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1398 | duration of this function. */ | |
67b5c0c1 MM |
1399 | old = replay_memory_access; |
1400 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1401 | |
1402 | ret = 0; | |
492d29ea PA |
1403 | TRY |
1404 | { | |
73971819 PA |
1405 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt, |
1406 | reason); | |
492d29ea | 1407 | } |
492d29ea PA |
1408 | CATCH (except, RETURN_MASK_ALL) |
1409 | { | |
6c63c96a | 1410 | replay_memory_access = old; |
492d29ea PA |
1411 | throw_exception (except); |
1412 | } | |
1413 | END_CATCH | |
6c63c96a | 1414 | replay_memory_access = old; |
633785ff MM |
1415 | |
1416 | return ret; | |
1417 | } | |
1418 | ||
1f3ef581 MM |
1419 | /* The to_fetch_registers method of target record-btrace. */ |
1420 | ||
1421 | static void | |
1422 | record_btrace_fetch_registers (struct target_ops *ops, | |
1423 | struct regcache *regcache, int regno) | |
1424 | { | |
1425 | struct btrace_insn_iterator *replay; | |
1426 | struct thread_info *tp; | |
1427 | ||
bcc0c096 | 1428 | tp = find_thread_ptid (regcache_get_ptid (regcache)); |
1f3ef581 MM |
1429 | gdb_assert (tp != NULL); |
1430 | ||
1431 | replay = tp->btrace.replay; | |
aef92902 | 1432 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1433 | { |
1434 | const struct btrace_insn *insn; | |
1435 | struct gdbarch *gdbarch; | |
1436 | int pcreg; | |
1437 | ||
ac7936df | 1438 | gdbarch = regcache->arch (); |
1f3ef581 MM |
1439 | pcreg = gdbarch_pc_regnum (gdbarch); |
1440 | if (pcreg < 0) | |
1441 | return; | |
1442 | ||
1443 | /* We can only provide the PC register. */ | |
1444 | if (regno >= 0 && regno != pcreg) | |
1445 | return; | |
1446 | ||
1447 | insn = btrace_insn_get (replay); | |
1448 | gdb_assert (insn != NULL); | |
1449 | ||
1450 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1451 | } | |
1452 | else | |
1453 | { | |
e75fdfca | 1454 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1455 | |
e75fdfca | 1456 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1457 | } |
1458 | } | |
1459 | ||
1460 | /* The to_store_registers method of target record-btrace. */ | |
1461 | ||
1462 | static void | |
1463 | record_btrace_store_registers (struct target_ops *ops, | |
1464 | struct regcache *regcache, int regno) | |
1465 | { | |
1466 | struct target_ops *t; | |
1467 | ||
a52eab48 | 1468 | if (!record_btrace_generating_corefile |
bcc0c096 | 1469 | && record_btrace_is_replaying (ops, regcache_get_ptid (regcache))) |
4d10e986 | 1470 | error (_("Cannot write registers while replaying.")); |
1f3ef581 MM |
1471 | |
1472 | gdb_assert (may_write_registers != 0); | |
1473 | ||
e75fdfca TT |
1474 | t = ops->beneath; |
1475 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1476 | } |
1477 | ||
1478 | /* The to_prepare_to_store method of target record-btrace. */ | |
1479 | ||
1480 | static void | |
1481 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1482 | struct regcache *regcache) | |
1483 | { | |
1484 | struct target_ops *t; | |
1485 | ||
a52eab48 | 1486 | if (!record_btrace_generating_corefile |
bcc0c096 | 1487 | && record_btrace_is_replaying (ops, regcache_get_ptid (regcache))) |
1f3ef581 MM |
1488 | return; |
1489 | ||
e75fdfca TT |
1490 | t = ops->beneath; |
1491 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1492 | } |
1493 | ||
0b722aec MM |
1494 | /* The branch trace frame cache. */ |
1495 | ||
1496 | struct btrace_frame_cache | |
1497 | { | |
1498 | /* The thread. */ | |
1499 | struct thread_info *tp; | |
1500 | ||
1501 | /* The frame info. */ | |
1502 | struct frame_info *frame; | |
1503 | ||
1504 | /* The branch trace function segment. */ | |
1505 | const struct btrace_function *bfun; | |
1506 | }; | |
1507 | ||
1508 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1509 | ||
1510 | static htab_t bfcache; | |
1511 | ||
1512 | /* hash_f for htab_create_alloc of bfcache. */ | |
1513 | ||
1514 | static hashval_t | |
1515 | bfcache_hash (const void *arg) | |
1516 | { | |
19ba03f4 SM |
1517 | const struct btrace_frame_cache *cache |
1518 | = (const struct btrace_frame_cache *) arg; | |
0b722aec MM |
1519 | |
1520 | return htab_hash_pointer (cache->frame); | |
1521 | } | |
1522 | ||
1523 | /* eq_f for htab_create_alloc of bfcache. */ | |
1524 | ||
1525 | static int | |
1526 | bfcache_eq (const void *arg1, const void *arg2) | |
1527 | { | |
19ba03f4 SM |
1528 | const struct btrace_frame_cache *cache1 |
1529 | = (const struct btrace_frame_cache *) arg1; | |
1530 | const struct btrace_frame_cache *cache2 | |
1531 | = (const struct btrace_frame_cache *) arg2; | |
0b722aec MM |
1532 | |
1533 | return cache1->frame == cache2->frame; | |
1534 | } | |
1535 | ||
1536 | /* Create a new btrace frame cache. */ | |
1537 | ||
1538 | static struct btrace_frame_cache * | |
1539 | bfcache_new (struct frame_info *frame) | |
1540 | { | |
1541 | struct btrace_frame_cache *cache; | |
1542 | void **slot; | |
1543 | ||
1544 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1545 | cache->frame = frame; | |
1546 | ||
1547 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1548 | gdb_assert (*slot == NULL); | |
1549 | *slot = cache; | |
1550 | ||
1551 | return cache; | |
1552 | } | |
1553 | ||
1554 | /* Extract the branch trace function from a branch trace frame. */ | |
1555 | ||
1556 | static const struct btrace_function * | |
1557 | btrace_get_frame_function (struct frame_info *frame) | |
1558 | { | |
1559 | const struct btrace_frame_cache *cache; | |
0b722aec MM |
1560 | struct btrace_frame_cache pattern; |
1561 | void **slot; | |
1562 | ||
1563 | pattern.frame = frame; | |
1564 | ||
1565 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1566 | if (slot == NULL) | |
1567 | return NULL; | |
1568 | ||
19ba03f4 | 1569 | cache = (const struct btrace_frame_cache *) *slot; |
0b722aec MM |
1570 | return cache->bfun; |
1571 | } | |
1572 | ||
cecac1ab MM |
1573 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1574 | ||
1575 | static enum unwind_stop_reason | |
1576 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1577 | void **this_cache) | |
1578 | { | |
0b722aec MM |
1579 | const struct btrace_frame_cache *cache; |
1580 | const struct btrace_function *bfun; | |
1581 | ||
19ba03f4 | 1582 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1583 | bfun = cache->bfun; |
1584 | gdb_assert (bfun != NULL); | |
1585 | ||
42bfe59e | 1586 | if (bfun->up == 0) |
0b722aec MM |
1587 | return UNWIND_UNAVAILABLE; |
1588 | ||
1589 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1590 | } |
1591 | ||
1592 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1593 | ||
1594 | static void | |
1595 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1596 | struct frame_id *this_id) | |
1597 | { | |
0b722aec MM |
1598 | const struct btrace_frame_cache *cache; |
1599 | const struct btrace_function *bfun; | |
4aeb0dfc | 1600 | struct btrace_call_iterator it; |
0b722aec MM |
1601 | CORE_ADDR code, special; |
1602 | ||
19ba03f4 | 1603 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1604 | |
1605 | bfun = cache->bfun; | |
1606 | gdb_assert (bfun != NULL); | |
1607 | ||
4aeb0dfc TW |
1608 | while (btrace_find_call_by_number (&it, &cache->tp->btrace, bfun->prev) != 0) |
1609 | bfun = btrace_call_get (&it); | |
0b722aec MM |
1610 | |
1611 | code = get_frame_func (this_frame); | |
1612 | special = bfun->number; | |
1613 | ||
1614 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1615 | ||
1616 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1617 | btrace_get_bfun_name (cache->bfun), | |
1618 | core_addr_to_string_nz (this_id->code_addr), | |
1619 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1620 | } |
1621 | ||
1622 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1623 | ||
1624 | static struct value * | |
1625 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1626 | void **this_cache, | |
1627 | int regnum) | |
1628 | { | |
0b722aec MM |
1629 | const struct btrace_frame_cache *cache; |
1630 | const struct btrace_function *bfun, *caller; | |
42bfe59e | 1631 | struct btrace_call_iterator it; |
0b722aec MM |
1632 | struct gdbarch *gdbarch; |
1633 | CORE_ADDR pc; | |
1634 | int pcreg; | |
1635 | ||
1636 | gdbarch = get_frame_arch (this_frame); | |
1637 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1638 | if (pcreg < 0 || regnum != pcreg) | |
1639 | throw_error (NOT_AVAILABLE_ERROR, | |
1640 | _("Registers are not available in btrace record history")); | |
1641 | ||
19ba03f4 | 1642 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1643 | bfun = cache->bfun; |
1644 | gdb_assert (bfun != NULL); | |
1645 | ||
42bfe59e | 1646 | if (btrace_find_call_by_number (&it, &cache->tp->btrace, bfun->up) == 0) |
0b722aec MM |
1647 | throw_error (NOT_AVAILABLE_ERROR, |
1648 | _("No caller in btrace record history")); | |
1649 | ||
42bfe59e TW |
1650 | caller = btrace_call_get (&it); |
1651 | ||
0b722aec | 1652 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) |
0860c437 | 1653 | pc = caller->insn.front ().pc; |
0b722aec MM |
1654 | else |
1655 | { | |
0860c437 | 1656 | pc = caller->insn.back ().pc; |
0b722aec MM |
1657 | pc += gdb_insn_length (gdbarch, pc); |
1658 | } | |
1659 | ||
1660 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1661 | btrace_get_bfun_name (bfun), bfun->level, | |
1662 | core_addr_to_string_nz (pc)); | |
1663 | ||
1664 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1665 | } |
1666 | ||
1667 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1668 | ||
1669 | static int | |
1670 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1671 | struct frame_info *this_frame, | |
1672 | void **this_cache) | |
1673 | { | |
0b722aec MM |
1674 | const struct btrace_function *bfun; |
1675 | struct btrace_frame_cache *cache; | |
cecac1ab | 1676 | struct thread_info *tp; |
0b722aec | 1677 | struct frame_info *next; |
cecac1ab MM |
1678 | |
1679 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1680 | tp = find_thread_ptid (inferior_ptid); | |
1681 | gdb_assert (tp != NULL); | |
1682 | ||
0b722aec MM |
1683 | bfun = NULL; |
1684 | next = get_next_frame (this_frame); | |
1685 | if (next == NULL) | |
1686 | { | |
1687 | const struct btrace_insn_iterator *replay; | |
1688 | ||
1689 | replay = tp->btrace.replay; | |
1690 | if (replay != NULL) | |
08c3f6d2 | 1691 | bfun = &replay->btinfo->functions[replay->call_index]; |
0b722aec MM |
1692 | } |
1693 | else | |
1694 | { | |
1695 | const struct btrace_function *callee; | |
42bfe59e | 1696 | struct btrace_call_iterator it; |
0b722aec MM |
1697 | |
1698 | callee = btrace_get_frame_function (next); | |
42bfe59e TW |
1699 | if (callee == NULL || (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) != 0) |
1700 | return 0; | |
1701 | ||
1702 | if (btrace_find_call_by_number (&it, &tp->btrace, callee->up) == 0) | |
1703 | return 0; | |
1704 | ||
1705 | bfun = btrace_call_get (&it); | |
0b722aec MM |
1706 | } |
1707 | ||
1708 | if (bfun == NULL) | |
1709 | return 0; | |
1710 | ||
1711 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1712 | btrace_get_bfun_name (bfun), bfun->level); | |
1713 | ||
1714 | /* This is our frame. Initialize the frame cache. */ | |
1715 | cache = bfcache_new (this_frame); | |
1716 | cache->tp = tp; | |
1717 | cache->bfun = bfun; | |
1718 | ||
1719 | *this_cache = cache; | |
1720 | return 1; | |
1721 | } | |
1722 | ||
1723 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1724 | ||
1725 | static int | |
1726 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1727 | struct frame_info *this_frame, | |
1728 | void **this_cache) | |
1729 | { | |
1730 | const struct btrace_function *bfun, *callee; | |
1731 | struct btrace_frame_cache *cache; | |
42bfe59e | 1732 | struct btrace_call_iterator it; |
0b722aec | 1733 | struct frame_info *next; |
42bfe59e | 1734 | struct thread_info *tinfo; |
0b722aec MM |
1735 | |
1736 | next = get_next_frame (this_frame); | |
1737 | if (next == NULL) | |
1738 | return 0; | |
1739 | ||
1740 | callee = btrace_get_frame_function (next); | |
1741 | if (callee == NULL) | |
1742 | return 0; | |
1743 | ||
1744 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1745 | return 0; | |
1746 | ||
42bfe59e TW |
1747 | tinfo = find_thread_ptid (inferior_ptid); |
1748 | if (btrace_find_call_by_number (&it, &tinfo->btrace, callee->up) == 0) | |
0b722aec MM |
1749 | return 0; |
1750 | ||
42bfe59e TW |
1751 | bfun = btrace_call_get (&it); |
1752 | ||
0b722aec MM |
1753 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", |
1754 | btrace_get_bfun_name (bfun), bfun->level); | |
1755 | ||
1756 | /* This is our frame. Initialize the frame cache. */ | |
1757 | cache = bfcache_new (this_frame); | |
42bfe59e | 1758 | cache->tp = tinfo; |
0b722aec MM |
1759 | cache->bfun = bfun; |
1760 | ||
1761 | *this_cache = cache; | |
1762 | return 1; | |
1763 | } | |
1764 | ||
1765 | static void | |
1766 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1767 | { | |
1768 | struct btrace_frame_cache *cache; | |
1769 | void **slot; | |
1770 | ||
19ba03f4 | 1771 | cache = (struct btrace_frame_cache *) this_cache; |
0b722aec MM |
1772 | |
1773 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1774 | gdb_assert (slot != NULL); | |
1775 | ||
1776 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1777 | } |
1778 | ||
1779 | /* btrace recording does not store previous memory content, neither the stack | |
1780 | frames content. Any unwinding would return errorneous results as the stack | |
1781 | contents no longer matches the changed PC value restored from history. | |
1782 | Therefore this unwinder reports any possibly unwound registers as | |
1783 | <unavailable>. */ | |
1784 | ||
0b722aec | 1785 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1786 | { |
1787 | NORMAL_FRAME, | |
1788 | record_btrace_frame_unwind_stop_reason, | |
1789 | record_btrace_frame_this_id, | |
1790 | record_btrace_frame_prev_register, | |
1791 | NULL, | |
0b722aec MM |
1792 | record_btrace_frame_sniffer, |
1793 | record_btrace_frame_dealloc_cache | |
1794 | }; | |
1795 | ||
1796 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1797 | { | |
1798 | TAILCALL_FRAME, | |
1799 | record_btrace_frame_unwind_stop_reason, | |
1800 | record_btrace_frame_this_id, | |
1801 | record_btrace_frame_prev_register, | |
1802 | NULL, | |
1803 | record_btrace_tailcall_frame_sniffer, | |
1804 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1805 | }; |
b2f4cfde | 1806 | |
ac01945b TT |
1807 | /* Implement the to_get_unwinder method. */ |
1808 | ||
1809 | static const struct frame_unwind * | |
1810 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1811 | { | |
1812 | return &record_btrace_frame_unwind; | |
1813 | } | |
1814 | ||
1815 | /* Implement the to_get_tailcall_unwinder method. */ | |
1816 | ||
1817 | static const struct frame_unwind * | |
1818 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1819 | { | |
1820 | return &record_btrace_tailcall_frame_unwind; | |
1821 | } | |
1822 | ||
987e68b1 MM |
1823 | /* Return a human-readable string for FLAG. */ |
1824 | ||
1825 | static const char * | |
1826 | btrace_thread_flag_to_str (enum btrace_thread_flag flag) | |
1827 | { | |
1828 | switch (flag) | |
1829 | { | |
1830 | case BTHR_STEP: | |
1831 | return "step"; | |
1832 | ||
1833 | case BTHR_RSTEP: | |
1834 | return "reverse-step"; | |
1835 | ||
1836 | case BTHR_CONT: | |
1837 | return "cont"; | |
1838 | ||
1839 | case BTHR_RCONT: | |
1840 | return "reverse-cont"; | |
1841 | ||
1842 | case BTHR_STOP: | |
1843 | return "stop"; | |
1844 | } | |
1845 | ||
1846 | return "<invalid>"; | |
1847 | } | |
1848 | ||
52834460 MM |
1849 | /* Indicate that TP should be resumed according to FLAG. */ |
1850 | ||
1851 | static void | |
1852 | record_btrace_resume_thread (struct thread_info *tp, | |
1853 | enum btrace_thread_flag flag) | |
1854 | { | |
1855 | struct btrace_thread_info *btinfo; | |
1856 | ||
43792cf0 | 1857 | DEBUG ("resuming thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 | 1858 | target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag)); |
52834460 MM |
1859 | |
1860 | btinfo = &tp->btrace; | |
1861 | ||
52834460 MM |
1862 | /* Fetch the latest branch trace. */ |
1863 | btrace_fetch (tp); | |
1864 | ||
0ca912df MM |
1865 | /* A resume request overwrites a preceding resume or stop request. */ |
1866 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1867 | btinfo->flags |= flag; |
1868 | } | |
1869 | ||
ec71cc2f MM |
1870 | /* Get the current frame for TP. */ |
1871 | ||
1872 | static struct frame_info * | |
1873 | get_thread_current_frame (struct thread_info *tp) | |
1874 | { | |
1875 | struct frame_info *frame; | |
1876 | ptid_t old_inferior_ptid; | |
1877 | int executing; | |
1878 | ||
1879 | /* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */ | |
1880 | old_inferior_ptid = inferior_ptid; | |
1881 | inferior_ptid = tp->ptid; | |
1882 | ||
1883 | /* Clear the executing flag to allow changes to the current frame. | |
1884 | We are not actually running, yet. We just started a reverse execution | |
1885 | command or a record goto command. | |
1886 | For the latter, EXECUTING is false and this has no effect. | |
1887 | For the former, EXECUTING is true and we're in to_wait, about to | |
1888 | move the thread. Since we need to recompute the stack, we temporarily | |
1889 | set EXECUTING to flase. */ | |
1890 | executing = is_executing (inferior_ptid); | |
1891 | set_executing (inferior_ptid, 0); | |
1892 | ||
1893 | frame = NULL; | |
1894 | TRY | |
1895 | { | |
1896 | frame = get_current_frame (); | |
1897 | } | |
1898 | CATCH (except, RETURN_MASK_ALL) | |
1899 | { | |
1900 | /* Restore the previous execution state. */ | |
1901 | set_executing (inferior_ptid, executing); | |
1902 | ||
1903 | /* Restore the previous inferior_ptid. */ | |
1904 | inferior_ptid = old_inferior_ptid; | |
1905 | ||
1906 | throw_exception (except); | |
1907 | } | |
1908 | END_CATCH | |
1909 | ||
1910 | /* Restore the previous execution state. */ | |
1911 | set_executing (inferior_ptid, executing); | |
1912 | ||
1913 | /* Restore the previous inferior_ptid. */ | |
1914 | inferior_ptid = old_inferior_ptid; | |
1915 | ||
1916 | return frame; | |
1917 | } | |
1918 | ||
52834460 MM |
1919 | /* Start replaying a thread. */ |
1920 | ||
1921 | static struct btrace_insn_iterator * | |
1922 | record_btrace_start_replaying (struct thread_info *tp) | |
1923 | { | |
52834460 MM |
1924 | struct btrace_insn_iterator *replay; |
1925 | struct btrace_thread_info *btinfo; | |
52834460 MM |
1926 | |
1927 | btinfo = &tp->btrace; | |
1928 | replay = NULL; | |
1929 | ||
1930 | /* We can't start replaying without trace. */ | |
b54b03bd | 1931 | if (btinfo->functions.empty ()) |
52834460 MM |
1932 | return NULL; |
1933 | ||
52834460 MM |
1934 | /* GDB stores the current frame_id when stepping in order to detects steps |
1935 | into subroutines. | |
1936 | Since frames are computed differently when we're replaying, we need to | |
1937 | recompute those stored frames and fix them up so we can still detect | |
1938 | subroutines after we started replaying. */ | |
492d29ea | 1939 | TRY |
52834460 MM |
1940 | { |
1941 | struct frame_info *frame; | |
1942 | struct frame_id frame_id; | |
1943 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1944 | ||
1945 | /* The current frame without replaying - computed via normal unwind. */ | |
ec71cc2f | 1946 | frame = get_thread_current_frame (tp); |
52834460 MM |
1947 | frame_id = get_frame_id (frame); |
1948 | ||
1949 | /* Check if we need to update any stepping-related frame id's. */ | |
1950 | upd_step_frame_id = frame_id_eq (frame_id, | |
1951 | tp->control.step_frame_id); | |
1952 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1953 | tp->control.step_stack_frame_id); | |
1954 | ||
1955 | /* We start replaying at the end of the branch trace. This corresponds | |
1956 | to the current instruction. */ | |
8d749320 | 1957 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
1958 | btrace_insn_end (replay, btinfo); |
1959 | ||
31fd9caa MM |
1960 | /* Skip gaps at the end of the trace. */ |
1961 | while (btrace_insn_get (replay) == NULL) | |
1962 | { | |
1963 | unsigned int steps; | |
1964 | ||
1965 | steps = btrace_insn_prev (replay, 1); | |
1966 | if (steps == 0) | |
1967 | error (_("No trace.")); | |
1968 | } | |
1969 | ||
52834460 MM |
1970 | /* We're not replaying, yet. */ |
1971 | gdb_assert (btinfo->replay == NULL); | |
1972 | btinfo->replay = replay; | |
1973 | ||
1974 | /* Make sure we're not using any stale registers. */ | |
1975 | registers_changed_ptid (tp->ptid); | |
1976 | ||
1977 | /* The current frame with replaying - computed via btrace unwind. */ | |
ec71cc2f | 1978 | frame = get_thread_current_frame (tp); |
52834460 MM |
1979 | frame_id = get_frame_id (frame); |
1980 | ||
1981 | /* Replace stepping related frames where necessary. */ | |
1982 | if (upd_step_frame_id) | |
1983 | tp->control.step_frame_id = frame_id; | |
1984 | if (upd_step_stack_frame_id) | |
1985 | tp->control.step_stack_frame_id = frame_id; | |
1986 | } | |
492d29ea | 1987 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
1988 | { |
1989 | xfree (btinfo->replay); | |
1990 | btinfo->replay = NULL; | |
1991 | ||
1992 | registers_changed_ptid (tp->ptid); | |
1993 | ||
1994 | throw_exception (except); | |
1995 | } | |
492d29ea | 1996 | END_CATCH |
52834460 MM |
1997 | |
1998 | return replay; | |
1999 | } | |
2000 | ||
2001 | /* Stop replaying a thread. */ | |
2002 | ||
2003 | static void | |
2004 | record_btrace_stop_replaying (struct thread_info *tp) | |
2005 | { | |
2006 | struct btrace_thread_info *btinfo; | |
2007 | ||
2008 | btinfo = &tp->btrace; | |
2009 | ||
2010 | xfree (btinfo->replay); | |
2011 | btinfo->replay = NULL; | |
2012 | ||
2013 | /* Make sure we're not leaving any stale registers. */ | |
2014 | registers_changed_ptid (tp->ptid); | |
2015 | } | |
2016 | ||
e3cfc1c7 MM |
2017 | /* Stop replaying TP if it is at the end of its execution history. */ |
2018 | ||
2019 | static void | |
2020 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
2021 | { | |
2022 | struct btrace_insn_iterator *replay, end; | |
2023 | struct btrace_thread_info *btinfo; | |
2024 | ||
2025 | btinfo = &tp->btrace; | |
2026 | replay = btinfo->replay; | |
2027 | ||
2028 | if (replay == NULL) | |
2029 | return; | |
2030 | ||
2031 | btrace_insn_end (&end, btinfo); | |
2032 | ||
2033 | if (btrace_insn_cmp (replay, &end) == 0) | |
2034 | record_btrace_stop_replaying (tp); | |
2035 | } | |
2036 | ||
b2f4cfde MM |
2037 | /* The to_resume method of target record-btrace. */ |
2038 | ||
2039 | static void | |
2040 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2041 | enum gdb_signal signal) | |
2042 | { | |
0ca912df | 2043 | struct thread_info *tp; |
d2939ba2 | 2044 | enum btrace_thread_flag flag, cflag; |
52834460 | 2045 | |
987e68b1 MM |
2046 | DEBUG ("resume %s: %s%s", target_pid_to_str (ptid), |
2047 | execution_direction == EXEC_REVERSE ? "reverse-" : "", | |
2048 | step ? "step" : "cont"); | |
52834460 | 2049 | |
0ca912df MM |
2050 | /* Store the execution direction of the last resume. |
2051 | ||
2052 | If there is more than one to_resume call, we have to rely on infrun | |
2053 | to not change the execution direction in-between. */ | |
70ad5bff MM |
2054 | record_btrace_resume_exec_dir = execution_direction; |
2055 | ||
0ca912df | 2056 | /* As long as we're not replaying, just forward the request. |
52834460 | 2057 | |
0ca912df MM |
2058 | For non-stop targets this means that no thread is replaying. In order to |
2059 | make progress, we may need to explicitly move replaying threads to the end | |
2060 | of their execution history. */ | |
a52eab48 MM |
2061 | if ((execution_direction != EXEC_REVERSE) |
2062 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2063 | { |
e75fdfca | 2064 | ops = ops->beneath; |
04c4fe8c MM |
2065 | ops->to_resume (ops, ptid, step, signal); |
2066 | return; | |
b2f4cfde MM |
2067 | } |
2068 | ||
52834460 | 2069 | /* Compute the btrace thread flag for the requested move. */ |
d2939ba2 MM |
2070 | if (execution_direction == EXEC_REVERSE) |
2071 | { | |
2072 | flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP; | |
2073 | cflag = BTHR_RCONT; | |
2074 | } | |
52834460 | 2075 | else |
d2939ba2 MM |
2076 | { |
2077 | flag = step == 0 ? BTHR_CONT : BTHR_STEP; | |
2078 | cflag = BTHR_CONT; | |
2079 | } | |
52834460 | 2080 | |
52834460 | 2081 | /* We just indicate the resume intent here. The actual stepping happens in |
d2939ba2 MM |
2082 | record_btrace_wait below. |
2083 | ||
2084 | For all-stop targets, we only step INFERIOR_PTID and continue others. */ | |
2085 | if (!target_is_non_stop_p ()) | |
2086 | { | |
2087 | gdb_assert (ptid_match (inferior_ptid, ptid)); | |
2088 | ||
2089 | ALL_NON_EXITED_THREADS (tp) | |
2090 | if (ptid_match (tp->ptid, ptid)) | |
2091 | { | |
2092 | if (ptid_match (tp->ptid, inferior_ptid)) | |
2093 | record_btrace_resume_thread (tp, flag); | |
2094 | else | |
2095 | record_btrace_resume_thread (tp, cflag); | |
2096 | } | |
2097 | } | |
2098 | else | |
2099 | { | |
2100 | ALL_NON_EXITED_THREADS (tp) | |
2101 | if (ptid_match (tp->ptid, ptid)) | |
2102 | record_btrace_resume_thread (tp, flag); | |
2103 | } | |
70ad5bff MM |
2104 | |
2105 | /* Async support. */ | |
2106 | if (target_can_async_p ()) | |
2107 | { | |
6a3753b3 | 2108 | target_async (1); |
70ad5bff MM |
2109 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
2110 | } | |
52834460 MM |
2111 | } |
2112 | ||
85ad3aaf PA |
2113 | /* The to_commit_resume method of target record-btrace. */ |
2114 | ||
2115 | static void | |
2116 | record_btrace_commit_resume (struct target_ops *ops) | |
2117 | { | |
2118 | if ((execution_direction != EXEC_REVERSE) | |
2119 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
2120 | ops->beneath->to_commit_resume (ops->beneath); | |
2121 | } | |
2122 | ||
987e68b1 MM |
2123 | /* Cancel resuming TP. */ |
2124 | ||
2125 | static void | |
2126 | record_btrace_cancel_resume (struct thread_info *tp) | |
2127 | { | |
2128 | enum btrace_thread_flag flags; | |
2129 | ||
2130 | flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP); | |
2131 | if (flags == 0) | |
2132 | return; | |
2133 | ||
43792cf0 PA |
2134 | DEBUG ("cancel resume thread %s (%s): %x (%s)", |
2135 | print_thread_id (tp), | |
987e68b1 MM |
2136 | target_pid_to_str (tp->ptid), flags, |
2137 | btrace_thread_flag_to_str (flags)); | |
2138 | ||
2139 | tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP); | |
e3cfc1c7 | 2140 | record_btrace_stop_replaying_at_end (tp); |
52834460 MM |
2141 | } |
2142 | ||
2143 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
2144 | ||
2145 | static struct target_waitstatus | |
2146 | btrace_step_no_history (void) | |
2147 | { | |
2148 | struct target_waitstatus status; | |
2149 | ||
2150 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
2151 | ||
2152 | return status; | |
2153 | } | |
2154 | ||
2155 | /* Return a target_waitstatus indicating that a step finished. */ | |
2156 | ||
2157 | static struct target_waitstatus | |
2158 | btrace_step_stopped (void) | |
2159 | { | |
2160 | struct target_waitstatus status; | |
2161 | ||
2162 | status.kind = TARGET_WAITKIND_STOPPED; | |
2163 | status.value.sig = GDB_SIGNAL_TRAP; | |
2164 | ||
2165 | return status; | |
2166 | } | |
2167 | ||
6e4879f0 MM |
2168 | /* Return a target_waitstatus indicating that a thread was stopped as |
2169 | requested. */ | |
2170 | ||
2171 | static struct target_waitstatus | |
2172 | btrace_step_stopped_on_request (void) | |
2173 | { | |
2174 | struct target_waitstatus status; | |
2175 | ||
2176 | status.kind = TARGET_WAITKIND_STOPPED; | |
2177 | status.value.sig = GDB_SIGNAL_0; | |
2178 | ||
2179 | return status; | |
2180 | } | |
2181 | ||
d825d248 MM |
2182 | /* Return a target_waitstatus indicating a spurious stop. */ |
2183 | ||
2184 | static struct target_waitstatus | |
2185 | btrace_step_spurious (void) | |
2186 | { | |
2187 | struct target_waitstatus status; | |
2188 | ||
2189 | status.kind = TARGET_WAITKIND_SPURIOUS; | |
2190 | ||
2191 | return status; | |
2192 | } | |
2193 | ||
e3cfc1c7 MM |
2194 | /* Return a target_waitstatus indicating that the thread was not resumed. */ |
2195 | ||
2196 | static struct target_waitstatus | |
2197 | btrace_step_no_resumed (void) | |
2198 | { | |
2199 | struct target_waitstatus status; | |
2200 | ||
2201 | status.kind = TARGET_WAITKIND_NO_RESUMED; | |
2202 | ||
2203 | return status; | |
2204 | } | |
2205 | ||
2206 | /* Return a target_waitstatus indicating that we should wait again. */ | |
2207 | ||
2208 | static struct target_waitstatus | |
2209 | btrace_step_again (void) | |
2210 | { | |
2211 | struct target_waitstatus status; | |
2212 | ||
2213 | status.kind = TARGET_WAITKIND_IGNORE; | |
2214 | ||
2215 | return status; | |
2216 | } | |
2217 | ||
52834460 MM |
2218 | /* Clear the record histories. */ |
2219 | ||
2220 | static void | |
2221 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
2222 | { | |
2223 | xfree (btinfo->insn_history); | |
2224 | xfree (btinfo->call_history); | |
2225 | ||
2226 | btinfo->insn_history = NULL; | |
2227 | btinfo->call_history = NULL; | |
2228 | } | |
2229 | ||
3c615f99 MM |
2230 | /* Check whether TP's current replay position is at a breakpoint. */ |
2231 | ||
2232 | static int | |
2233 | record_btrace_replay_at_breakpoint (struct thread_info *tp) | |
2234 | { | |
2235 | struct btrace_insn_iterator *replay; | |
2236 | struct btrace_thread_info *btinfo; | |
2237 | const struct btrace_insn *insn; | |
2238 | struct inferior *inf; | |
2239 | ||
2240 | btinfo = &tp->btrace; | |
2241 | replay = btinfo->replay; | |
2242 | ||
2243 | if (replay == NULL) | |
2244 | return 0; | |
2245 | ||
2246 | insn = btrace_insn_get (replay); | |
2247 | if (insn == NULL) | |
2248 | return 0; | |
2249 | ||
2250 | inf = find_inferior_ptid (tp->ptid); | |
2251 | if (inf == NULL) | |
2252 | return 0; | |
2253 | ||
2254 | return record_check_stopped_by_breakpoint (inf->aspace, insn->pc, | |
2255 | &btinfo->stop_reason); | |
2256 | } | |
2257 | ||
d825d248 | 2258 | /* Step one instruction in forward direction. */ |
52834460 MM |
2259 | |
2260 | static struct target_waitstatus | |
d825d248 | 2261 | record_btrace_single_step_forward (struct thread_info *tp) |
52834460 | 2262 | { |
b61ce85c | 2263 | struct btrace_insn_iterator *replay, end, start; |
52834460 | 2264 | struct btrace_thread_info *btinfo; |
52834460 | 2265 | |
d825d248 MM |
2266 | btinfo = &tp->btrace; |
2267 | replay = btinfo->replay; | |
2268 | ||
2269 | /* We're done if we're not replaying. */ | |
2270 | if (replay == NULL) | |
2271 | return btrace_step_no_history (); | |
2272 | ||
011c71b6 MM |
2273 | /* Check if we're stepping a breakpoint. */ |
2274 | if (record_btrace_replay_at_breakpoint (tp)) | |
2275 | return btrace_step_stopped (); | |
2276 | ||
b61ce85c MM |
2277 | /* Skip gaps during replay. If we end up at a gap (at the end of the trace), |
2278 | jump back to the instruction at which we started. */ | |
2279 | start = *replay; | |
d825d248 MM |
2280 | do |
2281 | { | |
2282 | unsigned int steps; | |
2283 | ||
e3cfc1c7 MM |
2284 | /* We will bail out here if we continue stepping after reaching the end |
2285 | of the execution history. */ | |
d825d248 MM |
2286 | steps = btrace_insn_next (replay, 1); |
2287 | if (steps == 0) | |
b61ce85c MM |
2288 | { |
2289 | *replay = start; | |
2290 | return btrace_step_no_history (); | |
2291 | } | |
d825d248 MM |
2292 | } |
2293 | while (btrace_insn_get (replay) == NULL); | |
2294 | ||
2295 | /* Determine the end of the instruction trace. */ | |
2296 | btrace_insn_end (&end, btinfo); | |
2297 | ||
e3cfc1c7 MM |
2298 | /* The execution trace contains (and ends with) the current instruction. |
2299 | This instruction has not been executed, yet, so the trace really ends | |
2300 | one instruction earlier. */ | |
d825d248 | 2301 | if (btrace_insn_cmp (replay, &end) == 0) |
e3cfc1c7 | 2302 | return btrace_step_no_history (); |
d825d248 MM |
2303 | |
2304 | return btrace_step_spurious (); | |
2305 | } | |
2306 | ||
2307 | /* Step one instruction in backward direction. */ | |
2308 | ||
2309 | static struct target_waitstatus | |
2310 | record_btrace_single_step_backward (struct thread_info *tp) | |
2311 | { | |
b61ce85c | 2312 | struct btrace_insn_iterator *replay, start; |
d825d248 | 2313 | struct btrace_thread_info *btinfo; |
e59fa00f | 2314 | |
52834460 MM |
2315 | btinfo = &tp->btrace; |
2316 | replay = btinfo->replay; | |
2317 | ||
d825d248 MM |
2318 | /* Start replaying if we're not already doing so. */ |
2319 | if (replay == NULL) | |
2320 | replay = record_btrace_start_replaying (tp); | |
2321 | ||
2322 | /* If we can't step any further, we reached the end of the history. | |
b61ce85c MM |
2323 | Skip gaps during replay. If we end up at a gap (at the beginning of |
2324 | the trace), jump back to the instruction at which we started. */ | |
2325 | start = *replay; | |
d825d248 MM |
2326 | do |
2327 | { | |
2328 | unsigned int steps; | |
2329 | ||
2330 | steps = btrace_insn_prev (replay, 1); | |
2331 | if (steps == 0) | |
b61ce85c MM |
2332 | { |
2333 | *replay = start; | |
2334 | return btrace_step_no_history (); | |
2335 | } | |
d825d248 MM |
2336 | } |
2337 | while (btrace_insn_get (replay) == NULL); | |
2338 | ||
011c71b6 MM |
2339 | /* Check if we're stepping a breakpoint. |
2340 | ||
2341 | For reverse-stepping, this check is after the step. There is logic in | |
2342 | infrun.c that handles reverse-stepping separately. See, for example, | |
2343 | proceed and adjust_pc_after_break. | |
2344 | ||
2345 | This code assumes that for reverse-stepping, PC points to the last | |
2346 | de-executed instruction, whereas for forward-stepping PC points to the | |
2347 | next to-be-executed instruction. */ | |
2348 | if (record_btrace_replay_at_breakpoint (tp)) | |
2349 | return btrace_step_stopped (); | |
2350 | ||
d825d248 MM |
2351 | return btrace_step_spurious (); |
2352 | } | |
2353 | ||
2354 | /* Step a single thread. */ | |
2355 | ||
2356 | static struct target_waitstatus | |
2357 | record_btrace_step_thread (struct thread_info *tp) | |
2358 | { | |
2359 | struct btrace_thread_info *btinfo; | |
2360 | struct target_waitstatus status; | |
2361 | enum btrace_thread_flag flags; | |
2362 | ||
2363 | btinfo = &tp->btrace; | |
2364 | ||
6e4879f0 MM |
2365 | flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP); |
2366 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 | 2367 | |
43792cf0 | 2368 | DEBUG ("stepping thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 MM |
2369 | target_pid_to_str (tp->ptid), flags, |
2370 | btrace_thread_flag_to_str (flags)); | |
52834460 | 2371 | |
6e4879f0 MM |
2372 | /* We can't step without an execution history. */ |
2373 | if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp)) | |
2374 | return btrace_step_no_history (); | |
2375 | ||
52834460 MM |
2376 | switch (flags) |
2377 | { | |
2378 | default: | |
2379 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
2380 | ||
6e4879f0 MM |
2381 | case BTHR_STOP: |
2382 | return btrace_step_stopped_on_request (); | |
2383 | ||
52834460 | 2384 | case BTHR_STEP: |
d825d248 MM |
2385 | status = record_btrace_single_step_forward (tp); |
2386 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2387 | break; |
52834460 MM |
2388 | |
2389 | return btrace_step_stopped (); | |
2390 | ||
2391 | case BTHR_RSTEP: | |
d825d248 MM |
2392 | status = record_btrace_single_step_backward (tp); |
2393 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2394 | break; |
52834460 MM |
2395 | |
2396 | return btrace_step_stopped (); | |
2397 | ||
2398 | case BTHR_CONT: | |
e3cfc1c7 MM |
2399 | status = record_btrace_single_step_forward (tp); |
2400 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2401 | break; | |
52834460 | 2402 | |
e3cfc1c7 MM |
2403 | btinfo->flags |= flags; |
2404 | return btrace_step_again (); | |
52834460 MM |
2405 | |
2406 | case BTHR_RCONT: | |
e3cfc1c7 MM |
2407 | status = record_btrace_single_step_backward (tp); |
2408 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2409 | break; | |
52834460 | 2410 | |
e3cfc1c7 MM |
2411 | btinfo->flags |= flags; |
2412 | return btrace_step_again (); | |
2413 | } | |
d825d248 | 2414 | |
e3cfc1c7 MM |
2415 | /* We keep threads moving at the end of their execution history. The to_wait |
2416 | method will stop the thread for whom the event is reported. */ | |
2417 | if (status.kind == TARGET_WAITKIND_NO_HISTORY) | |
2418 | btinfo->flags |= flags; | |
52834460 | 2419 | |
e3cfc1c7 | 2420 | return status; |
b2f4cfde MM |
2421 | } |
2422 | ||
e3cfc1c7 MM |
2423 | /* A vector of threads. */ |
2424 | ||
2425 | typedef struct thread_info * tp_t; | |
2426 | DEF_VEC_P (tp_t); | |
2427 | ||
a6b5be76 MM |
2428 | /* Announce further events if necessary. */ |
2429 | ||
2430 | static void | |
53127008 SM |
2431 | record_btrace_maybe_mark_async_event |
2432 | (const std::vector<thread_info *> &moving, | |
2433 | const std::vector<thread_info *> &no_history) | |
a6b5be76 | 2434 | { |
53127008 SM |
2435 | bool more_moving = !moving.empty (); |
2436 | bool more_no_history = !no_history.empty ();; | |
a6b5be76 MM |
2437 | |
2438 | if (!more_moving && !more_no_history) | |
2439 | return; | |
2440 | ||
2441 | if (more_moving) | |
2442 | DEBUG ("movers pending"); | |
2443 | ||
2444 | if (more_no_history) | |
2445 | DEBUG ("no-history pending"); | |
2446 | ||
2447 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
2448 | } | |
2449 | ||
b2f4cfde MM |
2450 | /* The to_wait method of target record-btrace. */ |
2451 | ||
2452 | static ptid_t | |
2453 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2454 | struct target_waitstatus *status, int options) | |
2455 | { | |
53127008 SM |
2456 | std::vector<thread_info *> moving; |
2457 | std::vector<thread_info *> no_history; | |
52834460 MM |
2458 | |
2459 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2460 | ||
b2f4cfde | 2461 | /* As long as we're not replaying, just forward the request. */ |
a52eab48 MM |
2462 | if ((execution_direction != EXEC_REVERSE) |
2463 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2464 | { |
e75fdfca TT |
2465 | ops = ops->beneath; |
2466 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2467 | } |
2468 | ||
e3cfc1c7 | 2469 | /* Keep a work list of moving threads. */ |
53127008 SM |
2470 | { |
2471 | thread_info *tp; | |
2472 | ||
2473 | ALL_NON_EXITED_THREADS (tp) | |
2474 | { | |
2475 | if (ptid_match (tp->ptid, ptid) | |
2476 | && ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)) | |
2477 | moving.push_back (tp); | |
2478 | } | |
2479 | } | |
e3cfc1c7 | 2480 | |
53127008 | 2481 | if (moving.empty ()) |
52834460 | 2482 | { |
e3cfc1c7 | 2483 | *status = btrace_step_no_resumed (); |
52834460 | 2484 | |
e3cfc1c7 | 2485 | DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid), |
23fdd69e | 2486 | target_waitstatus_to_string (status).c_str ()); |
e3cfc1c7 | 2487 | |
e3cfc1c7 | 2488 | return null_ptid; |
52834460 MM |
2489 | } |
2490 | ||
e3cfc1c7 MM |
2491 | /* Step moving threads one by one, one step each, until either one thread |
2492 | reports an event or we run out of threads to step. | |
2493 | ||
2494 | When stepping more than one thread, chances are that some threads reach | |
2495 | the end of their execution history earlier than others. If we reported | |
2496 | this immediately, all-stop on top of non-stop would stop all threads and | |
2497 | resume the same threads next time. And we would report the same thread | |
2498 | having reached the end of its execution history again. | |
2499 | ||
2500 | In the worst case, this would starve the other threads. But even if other | |
2501 | threads would be allowed to make progress, this would result in far too | |
2502 | many intermediate stops. | |
2503 | ||
2504 | We therefore delay the reporting of "no execution history" until we have | |
2505 | nothing else to report. By this time, all threads should have moved to | |
2506 | either the beginning or the end of their execution history. There will | |
2507 | be a single user-visible stop. */ | |
53127008 SM |
2508 | struct thread_info *eventing = NULL; |
2509 | while ((eventing == NULL) && !moving.empty ()) | |
e3cfc1c7 | 2510 | { |
53127008 | 2511 | for (unsigned int ix = 0; eventing == NULL && ix < moving.size ();) |
e3cfc1c7 | 2512 | { |
53127008 SM |
2513 | thread_info *tp = moving[ix]; |
2514 | ||
e3cfc1c7 MM |
2515 | *status = record_btrace_step_thread (tp); |
2516 | ||
2517 | switch (status->kind) | |
2518 | { | |
2519 | case TARGET_WAITKIND_IGNORE: | |
2520 | ix++; | |
2521 | break; | |
2522 | ||
2523 | case TARGET_WAITKIND_NO_HISTORY: | |
53127008 | 2524 | no_history.push_back (ordered_remove (moving, ix)); |
e3cfc1c7 MM |
2525 | break; |
2526 | ||
2527 | default: | |
53127008 | 2528 | eventing = unordered_remove (moving, ix); |
e3cfc1c7 MM |
2529 | break; |
2530 | } | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | if (eventing == NULL) | |
2535 | { | |
2536 | /* We started with at least one moving thread. This thread must have | |
2537 | either stopped or reached the end of its execution history. | |
2538 | ||
2539 | In the former case, EVENTING must not be NULL. | |
2540 | In the latter case, NO_HISTORY must not be empty. */ | |
53127008 | 2541 | gdb_assert (!no_history.empty ()); |
e3cfc1c7 MM |
2542 | |
2543 | /* We kept threads moving at the end of their execution history. Stop | |
2544 | EVENTING now that we are going to report its stop. */ | |
53127008 | 2545 | eventing = unordered_remove (no_history, 0); |
e3cfc1c7 MM |
2546 | eventing->btrace.flags &= ~BTHR_MOVE; |
2547 | ||
2548 | *status = btrace_step_no_history (); | |
2549 | } | |
2550 | ||
2551 | gdb_assert (eventing != NULL); | |
2552 | ||
2553 | /* We kept threads replaying at the end of their execution history. Stop | |
2554 | replaying EVENTING now that we are going to report its stop. */ | |
2555 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2556 | |
2557 | /* Stop all other threads. */ | |
5953356c | 2558 | if (!target_is_non_stop_p ()) |
53127008 SM |
2559 | { |
2560 | thread_info *tp; | |
2561 | ||
2562 | ALL_NON_EXITED_THREADS (tp) | |
2563 | record_btrace_cancel_resume (tp); | |
2564 | } | |
52834460 | 2565 | |
a6b5be76 MM |
2566 | /* In async mode, we need to announce further events. */ |
2567 | if (target_is_async_p ()) | |
2568 | record_btrace_maybe_mark_async_event (moving, no_history); | |
2569 | ||
52834460 | 2570 | /* Start record histories anew from the current position. */ |
e3cfc1c7 | 2571 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2572 | |
2573 | /* We moved the replay position but did not update registers. */ | |
e3cfc1c7 MM |
2574 | registers_changed_ptid (eventing->ptid); |
2575 | ||
43792cf0 PA |
2576 | DEBUG ("wait ended by thread %s (%s): %s", |
2577 | print_thread_id (eventing), | |
e3cfc1c7 | 2578 | target_pid_to_str (eventing->ptid), |
23fdd69e | 2579 | target_waitstatus_to_string (status).c_str ()); |
52834460 | 2580 | |
e3cfc1c7 | 2581 | return eventing->ptid; |
52834460 MM |
2582 | } |
2583 | ||
6e4879f0 MM |
2584 | /* The to_stop method of target record-btrace. */ |
2585 | ||
2586 | static void | |
2587 | record_btrace_stop (struct target_ops *ops, ptid_t ptid) | |
2588 | { | |
2589 | DEBUG ("stop %s", target_pid_to_str (ptid)); | |
2590 | ||
2591 | /* As long as we're not replaying, just forward the request. */ | |
a52eab48 MM |
2592 | if ((execution_direction != EXEC_REVERSE) |
2593 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
6e4879f0 MM |
2594 | { |
2595 | ops = ops->beneath; | |
2596 | ops->to_stop (ops, ptid); | |
2597 | } | |
2598 | else | |
2599 | { | |
2600 | struct thread_info *tp; | |
2601 | ||
2602 | ALL_NON_EXITED_THREADS (tp) | |
2603 | if (ptid_match (tp->ptid, ptid)) | |
2604 | { | |
2605 | tp->btrace.flags &= ~BTHR_MOVE; | |
2606 | tp->btrace.flags |= BTHR_STOP; | |
2607 | } | |
2608 | } | |
2609 | } | |
2610 | ||
52834460 MM |
2611 | /* The to_can_execute_reverse method of target record-btrace. */ |
2612 | ||
2613 | static int | |
19db3e69 | 2614 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2615 | { |
2616 | return 1; | |
2617 | } | |
2618 | ||
9e8915c6 | 2619 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2620 | |
9e8915c6 PA |
2621 | static int |
2622 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2623 | { |
a52eab48 | 2624 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2625 | { |
2626 | struct thread_info *tp = inferior_thread (); | |
2627 | ||
2628 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2629 | } | |
2630 | ||
2631 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2632 | } | |
2633 | ||
2634 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2635 | record-btrace. */ | |
2636 | ||
2637 | static int | |
2638 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2639 | { | |
a52eab48 | 2640 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2641 | return 1; |
2642 | ||
2643 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2644 | } | |
2645 | ||
2646 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2647 | ||
2648 | static int | |
2649 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2650 | { | |
a52eab48 | 2651 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2652 | { |
2653 | struct thread_info *tp = inferior_thread (); | |
2654 | ||
2655 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2656 | } | |
2657 | ||
2658 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2659 | } | |
2660 | ||
2661 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2662 | record-btrace. */ | |
2663 | ||
2664 | static int | |
2665 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2666 | { | |
a52eab48 | 2667 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 | 2668 | return 1; |
52834460 | 2669 | |
9e8915c6 | 2670 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2671 | } |
2672 | ||
e8032dde | 2673 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2674 | |
2675 | static void | |
e8032dde | 2676 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2677 | { |
e8032dde | 2678 | /* We don't add or remove threads during replay. */ |
a52eab48 | 2679 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2680 | return; |
2681 | ||
2682 | /* Forward the request. */ | |
e75fdfca | 2683 | ops = ops->beneath; |
e8032dde | 2684 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2685 | } |
2686 | ||
2687 | /* The to_thread_alive method of target record-btrace. */ | |
2688 | ||
2689 | static int | |
2690 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2691 | { | |
2692 | /* We don't add or remove threads during replay. */ | |
a52eab48 | 2693 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2694 | return find_thread_ptid (ptid) != NULL; |
2695 | ||
2696 | /* Forward the request. */ | |
e75fdfca TT |
2697 | ops = ops->beneath; |
2698 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2699 | } |
2700 | ||
066ce621 MM |
2701 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2702 | is stopped. */ | |
2703 | ||
2704 | static void | |
2705 | record_btrace_set_replay (struct thread_info *tp, | |
2706 | const struct btrace_insn_iterator *it) | |
2707 | { | |
2708 | struct btrace_thread_info *btinfo; | |
2709 | ||
2710 | btinfo = &tp->btrace; | |
2711 | ||
a0f1b963 | 2712 | if (it == NULL) |
52834460 | 2713 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2714 | else |
2715 | { | |
2716 | if (btinfo->replay == NULL) | |
52834460 | 2717 | record_btrace_start_replaying (tp); |
066ce621 MM |
2718 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2719 | return; | |
2720 | ||
2721 | *btinfo->replay = *it; | |
52834460 | 2722 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2723 | } |
2724 | ||
52834460 MM |
2725 | /* Start anew from the new replay position. */ |
2726 | record_btrace_clear_histories (btinfo); | |
485668e5 MM |
2727 | |
2728 | stop_pc = regcache_read_pc (get_current_regcache ()); | |
2729 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
066ce621 MM |
2730 | } |
2731 | ||
2732 | /* The to_goto_record_begin method of target record-btrace. */ | |
2733 | ||
2734 | static void | |
08475817 | 2735 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2736 | { |
2737 | struct thread_info *tp; | |
2738 | struct btrace_insn_iterator begin; | |
2739 | ||
2740 | tp = require_btrace_thread (); | |
2741 | ||
2742 | btrace_insn_begin (&begin, &tp->btrace); | |
b61ce85c MM |
2743 | |
2744 | /* Skip gaps at the beginning of the trace. */ | |
2745 | while (btrace_insn_get (&begin) == NULL) | |
2746 | { | |
2747 | unsigned int steps; | |
2748 | ||
2749 | steps = btrace_insn_next (&begin, 1); | |
2750 | if (steps == 0) | |
2751 | error (_("No trace.")); | |
2752 | } | |
2753 | ||
066ce621 | 2754 | record_btrace_set_replay (tp, &begin); |
066ce621 MM |
2755 | } |
2756 | ||
2757 | /* The to_goto_record_end method of target record-btrace. */ | |
2758 | ||
2759 | static void | |
307a1b91 | 2760 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2761 | { |
2762 | struct thread_info *tp; | |
2763 | ||
2764 | tp = require_btrace_thread (); | |
2765 | ||
2766 | record_btrace_set_replay (tp, NULL); | |
066ce621 MM |
2767 | } |
2768 | ||
2769 | /* The to_goto_record method of target record-btrace. */ | |
2770 | ||
2771 | static void | |
606183ac | 2772 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2773 | { |
2774 | struct thread_info *tp; | |
2775 | struct btrace_insn_iterator it; | |
2776 | unsigned int number; | |
2777 | int found; | |
2778 | ||
2779 | number = insn; | |
2780 | ||
2781 | /* Check for wrap-arounds. */ | |
2782 | if (number != insn) | |
2783 | error (_("Instruction number out of range.")); | |
2784 | ||
2785 | tp = require_btrace_thread (); | |
2786 | ||
2787 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
69090cee TW |
2788 | |
2789 | /* Check if the instruction could not be found or is a gap. */ | |
2790 | if (found == 0 || btrace_insn_get (&it) == NULL) | |
066ce621 MM |
2791 | error (_("No such instruction.")); |
2792 | ||
2793 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2794 | } |
2795 | ||
797094dd MM |
2796 | /* The to_record_stop_replaying method of target record-btrace. */ |
2797 | ||
2798 | static void | |
2799 | record_btrace_stop_replaying_all (struct target_ops *self) | |
2800 | { | |
2801 | struct thread_info *tp; | |
2802 | ||
2803 | ALL_NON_EXITED_THREADS (tp) | |
2804 | record_btrace_stop_replaying (tp); | |
2805 | } | |
2806 | ||
70ad5bff MM |
2807 | /* The to_execution_direction target method. */ |
2808 | ||
2809 | static enum exec_direction_kind | |
2810 | record_btrace_execution_direction (struct target_ops *self) | |
2811 | { | |
2812 | return record_btrace_resume_exec_dir; | |
2813 | } | |
2814 | ||
aef92902 MM |
2815 | /* The to_prepare_to_generate_core target method. */ |
2816 | ||
2817 | static void | |
2818 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2819 | { | |
2820 | record_btrace_generating_corefile = 1; | |
2821 | } | |
2822 | ||
2823 | /* The to_done_generating_core target method. */ | |
2824 | ||
2825 | static void | |
2826 | record_btrace_done_generating_core (struct target_ops *self) | |
2827 | { | |
2828 | record_btrace_generating_corefile = 0; | |
2829 | } | |
2830 | ||
afedecd3 MM |
2831 | /* Initialize the record-btrace target ops. */ |
2832 | ||
2833 | static void | |
2834 | init_record_btrace_ops (void) | |
2835 | { | |
2836 | struct target_ops *ops; | |
2837 | ||
2838 | ops = &record_btrace_ops; | |
2839 | ops->to_shortname = "record-btrace"; | |
2840 | ops->to_longname = "Branch tracing target"; | |
2841 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2842 | ops->to_open = record_btrace_open; | |
2843 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2844 | ops->to_async = record_btrace_async; |
afedecd3 | 2845 | ops->to_detach = record_detach; |
c0272db5 | 2846 | ops->to_disconnect = record_btrace_disconnect; |
afedecd3 MM |
2847 | ops->to_mourn_inferior = record_mourn_inferior; |
2848 | ops->to_kill = record_kill; | |
afedecd3 MM |
2849 | ops->to_stop_recording = record_btrace_stop_recording; |
2850 | ops->to_info_record = record_btrace_info; | |
2851 | ops->to_insn_history = record_btrace_insn_history; | |
2852 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2853 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2854 | ops->to_call_history = record_btrace_call_history; | |
2855 | ops->to_call_history_from = record_btrace_call_history_from; | |
2856 | ops->to_call_history_range = record_btrace_call_history_range; | |
b158a20f | 2857 | ops->to_record_method = record_btrace_record_method; |
07bbe694 | 2858 | ops->to_record_is_replaying = record_btrace_is_replaying; |
7ff27e9b | 2859 | ops->to_record_will_replay = record_btrace_will_replay; |
797094dd | 2860 | ops->to_record_stop_replaying = record_btrace_stop_replaying_all; |
633785ff MM |
2861 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2862 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2863 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2864 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2865 | ops->to_store_registers = record_btrace_store_registers; | |
2866 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2867 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2868 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde | 2869 | ops->to_resume = record_btrace_resume; |
85ad3aaf | 2870 | ops->to_commit_resume = record_btrace_commit_resume; |
b2f4cfde | 2871 | ops->to_wait = record_btrace_wait; |
6e4879f0 | 2872 | ops->to_stop = record_btrace_stop; |
e8032dde | 2873 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2874 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2875 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2876 | ops->to_goto_record_end = record_btrace_goto_end; | |
2877 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2878 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2879 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2880 | ops->to_supports_stopped_by_sw_breakpoint | |
2881 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2882 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2883 | ops->to_supports_stopped_by_hw_breakpoint | |
2884 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2885 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2886 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2887 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2888 | ops->to_stratum = record_stratum; |
2889 | ops->to_magic = OPS_MAGIC; | |
2890 | } | |
2891 | ||
f4abbc16 MM |
2892 | /* Start recording in BTS format. */ |
2893 | ||
2894 | static void | |
cdb34d4a | 2895 | cmd_record_btrace_bts_start (const char *args, int from_tty) |
f4abbc16 | 2896 | { |
f4abbc16 MM |
2897 | if (args != NULL && *args != 0) |
2898 | error (_("Invalid argument.")); | |
2899 | ||
2900 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2901 | ||
492d29ea PA |
2902 | TRY |
2903 | { | |
95a6b0a1 | 2904 | execute_command ("target record-btrace", from_tty); |
492d29ea PA |
2905 | } |
2906 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2907 | { |
2908 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2909 | throw_exception (exception); | |
2910 | } | |
492d29ea | 2911 | END_CATCH |
f4abbc16 MM |
2912 | } |
2913 | ||
bc504a31 | 2914 | /* Start recording in Intel Processor Trace format. */ |
afedecd3 MM |
2915 | |
2916 | static void | |
cdb34d4a | 2917 | cmd_record_btrace_pt_start (const char *args, int from_tty) |
afedecd3 MM |
2918 | { |
2919 | if (args != NULL && *args != 0) | |
2920 | error (_("Invalid argument.")); | |
2921 | ||
b20a6524 | 2922 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2923 | |
492d29ea PA |
2924 | TRY |
2925 | { | |
95a6b0a1 | 2926 | execute_command ("target record-btrace", from_tty); |
492d29ea PA |
2927 | } |
2928 | CATCH (exception, RETURN_MASK_ALL) | |
2929 | { | |
2930 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2931 | throw_exception (exception); | |
2932 | } | |
2933 | END_CATCH | |
afedecd3 MM |
2934 | } |
2935 | ||
b20a6524 MM |
2936 | /* Alias for "target record". */ |
2937 | ||
2938 | static void | |
981a3fb3 | 2939 | cmd_record_btrace_start (const char *args, int from_tty) |
b20a6524 MM |
2940 | { |
2941 | if (args != NULL && *args != 0) | |
2942 | error (_("Invalid argument.")); | |
2943 | ||
2944 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2945 | ||
2946 | TRY | |
2947 | { | |
95a6b0a1 | 2948 | execute_command ("target record-btrace", from_tty); |
b20a6524 MM |
2949 | } |
2950 | CATCH (exception, RETURN_MASK_ALL) | |
2951 | { | |
2952 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2953 | ||
2954 | TRY | |
2955 | { | |
95a6b0a1 | 2956 | execute_command ("target record-btrace", from_tty); |
b20a6524 MM |
2957 | } |
2958 | CATCH (exception, RETURN_MASK_ALL) | |
2959 | { | |
2960 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2961 | throw_exception (exception); | |
2962 | } | |
2963 | END_CATCH | |
2964 | } | |
2965 | END_CATCH | |
2966 | } | |
2967 | ||
67b5c0c1 MM |
2968 | /* The "set record btrace" command. */ |
2969 | ||
2970 | static void | |
981a3fb3 | 2971 | cmd_set_record_btrace (const char *args, int from_tty) |
67b5c0c1 MM |
2972 | { |
2973 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2974 | } | |
2975 | ||
2976 | /* The "show record btrace" command. */ | |
2977 | ||
2978 | static void | |
981a3fb3 | 2979 | cmd_show_record_btrace (const char *args, int from_tty) |
67b5c0c1 MM |
2980 | { |
2981 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2982 | } | |
2983 | ||
2984 | /* The "show record btrace replay-memory-access" command. */ | |
2985 | ||
2986 | static void | |
2987 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2988 | struct cmd_list_element *c, const char *value) | |
2989 | { | |
2990 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2991 | replay_memory_access); | |
2992 | } | |
2993 | ||
d33501a5 MM |
2994 | /* The "set record btrace bts" command. */ |
2995 | ||
2996 | static void | |
981a3fb3 | 2997 | cmd_set_record_btrace_bts (const char *args, int from_tty) |
d33501a5 MM |
2998 | { |
2999 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
b20a6524 | 3000 | "by an appropriate subcommand.\n")); |
d33501a5 MM |
3001 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", |
3002 | all_commands, gdb_stdout); | |
3003 | } | |
3004 | ||
3005 | /* The "show record btrace bts" command. */ | |
3006 | ||
3007 | static void | |
981a3fb3 | 3008 | cmd_show_record_btrace_bts (const char *args, int from_tty) |
d33501a5 MM |
3009 | { |
3010 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
3011 | } | |
3012 | ||
b20a6524 MM |
3013 | /* The "set record btrace pt" command. */ |
3014 | ||
3015 | static void | |
981a3fb3 | 3016 | cmd_set_record_btrace_pt (const char *args, int from_tty) |
b20a6524 MM |
3017 | { |
3018 | printf_unfiltered (_("\"set record btrace pt\" must be followed " | |
3019 | "by an appropriate subcommand.\n")); | |
3020 | help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ", | |
3021 | all_commands, gdb_stdout); | |
3022 | } | |
3023 | ||
3024 | /* The "show record btrace pt" command. */ | |
3025 | ||
3026 | static void | |
981a3fb3 | 3027 | cmd_show_record_btrace_pt (const char *args, int from_tty) |
b20a6524 MM |
3028 | { |
3029 | cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, ""); | |
3030 | } | |
3031 | ||
3032 | /* The "record bts buffer-size" show value function. */ | |
3033 | ||
3034 | static void | |
3035 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
3036 | struct cmd_list_element *c, | |
3037 | const char *value) | |
3038 | { | |
3039 | fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"), | |
3040 | value); | |
3041 | } | |
3042 | ||
3043 | /* The "record pt buffer-size" show value function. */ | |
3044 | ||
3045 | static void | |
3046 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
3047 | struct cmd_list_element *c, | |
3048 | const char *value) | |
3049 | { | |
3050 | fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"), | |
3051 | value); | |
3052 | } | |
3053 | ||
afedecd3 MM |
3054 | /* Initialize btrace commands. */ |
3055 | ||
3056 | void | |
3057 | _initialize_record_btrace (void) | |
3058 | { | |
f4abbc16 MM |
3059 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
3060 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
3061 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
3062 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
3063 | ||
f4abbc16 MM |
3064 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
3065 | _("\ | |
3066 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
3067 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
3068 | This format may not be available on all processors."), | |
3069 | &record_btrace_cmdlist); | |
3070 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
3071 | ||
b20a6524 MM |
3072 | add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, |
3073 | _("\ | |
bc504a31 | 3074 | Start branch trace recording in Intel Processor Trace format.\n\n\ |
b20a6524 MM |
3075 | This format may not be available on all processors."), |
3076 | &record_btrace_cmdlist); | |
3077 | add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist); | |
3078 | ||
67b5c0c1 MM |
3079 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
3080 | _("Set record options"), &set_record_btrace_cmdlist, | |
3081 | "set record btrace ", 0, &set_record_cmdlist); | |
3082 | ||
3083 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
3084 | _("Show record options"), &show_record_btrace_cmdlist, | |
3085 | "show record btrace ", 0, &show_record_cmdlist); | |
3086 | ||
3087 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
3088 | replay_memory_access_types, &replay_memory_access, _("\ | |
3089 | Set what memory accesses are allowed during replay."), _("\ | |
3090 | Show what memory accesses are allowed during replay."), | |
3091 | _("Default is READ-ONLY.\n\n\ | |
3092 | The btrace record target does not trace data.\n\ | |
3093 | The memory therefore corresponds to the live target and not \ | |
3094 | to the current replay position.\n\n\ | |
3095 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
3096 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
3097 | replay."), | |
3098 | NULL, cmd_show_replay_memory_access, | |
3099 | &set_record_btrace_cmdlist, | |
3100 | &show_record_btrace_cmdlist); | |
3101 | ||
d33501a5 MM |
3102 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
3103 | _("Set record btrace bts options"), | |
3104 | &set_record_btrace_bts_cmdlist, | |
3105 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
3106 | ||
3107 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
3108 | _("Show record btrace bts options"), | |
3109 | &show_record_btrace_bts_cmdlist, | |
3110 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
3111 | ||
3112 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3113 | &record_btrace_conf.bts.size, | |
3114 | _("Set the record/replay bts buffer size."), | |
3115 | _("Show the record/replay bts buffer size."), _("\ | |
3116 | When starting recording request a trace buffer of this size. \ | |
3117 | The actual buffer size may differ from the requested size. \ | |
3118 | Use \"info record\" to see the actual buffer size.\n\n\ | |
3119 | Bigger buffers allow longer recording but also take more time to process \ | |
3120 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
3121 | The trace buffer size may not be changed while recording."), NULL, |
3122 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
3123 | &set_record_btrace_bts_cmdlist, |
3124 | &show_record_btrace_bts_cmdlist); | |
3125 | ||
b20a6524 MM |
3126 | add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt, |
3127 | _("Set record btrace pt options"), | |
3128 | &set_record_btrace_pt_cmdlist, | |
3129 | "set record btrace pt ", 0, &set_record_btrace_cmdlist); | |
3130 | ||
3131 | add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt, | |
3132 | _("Show record btrace pt options"), | |
3133 | &show_record_btrace_pt_cmdlist, | |
3134 | "show record btrace pt ", 0, &show_record_btrace_cmdlist); | |
3135 | ||
3136 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3137 | &record_btrace_conf.pt.size, | |
3138 | _("Set the record/replay pt buffer size."), | |
3139 | _("Show the record/replay pt buffer size."), _("\ | |
3140 | Bigger buffers allow longer recording but also take more time to process \ | |
3141 | the recorded execution.\n\ | |
3142 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
3143 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
3144 | &set_record_btrace_pt_cmdlist, | |
3145 | &show_record_btrace_pt_cmdlist); | |
3146 | ||
afedecd3 MM |
3147 | init_record_btrace_ops (); |
3148 | add_target (&record_btrace_ops); | |
0b722aec MM |
3149 | |
3150 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
3151 | xcalloc, xfree); | |
d33501a5 MM |
3152 | |
3153 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 3154 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 3155 | } |