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