Commit | Line | Data |
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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
618f726f | 3 | Copyright (C) 2013-2016 Free Software Foundation, Inc. |
afedecd3 MM |
4 | |
5 | Contributed by Intel Corp. <markus.t.metzger@intel.com> | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "record.h" | |
24 | #include "gdbthread.h" | |
25 | #include "target.h" | |
26 | #include "gdbcmd.h" | |
27 | #include "disasm.h" | |
28 | #include "observer.h" | |
afedecd3 MM |
29 | #include "cli/cli-utils.h" |
30 | #include "source.h" | |
31 | #include "ui-out.h" | |
32 | #include "symtab.h" | |
33 | #include "filenames.h" | |
1f3ef581 | 34 | #include "regcache.h" |
cecac1ab | 35 | #include "frame-unwind.h" |
0b722aec | 36 | #include "hashtab.h" |
45741a9c | 37 | #include "infrun.h" |
70ad5bff MM |
38 | #include "event-loop.h" |
39 | #include "inf-loop.h" | |
e3cfc1c7 | 40 | #include "vec.h" |
afedecd3 MM |
41 | |
42 | /* The target_ops of record-btrace. */ | |
43 | static struct target_ops record_btrace_ops; | |
44 | ||
45 | /* A new thread observer enabling branch tracing for the new thread. */ | |
46 | static struct observer *record_btrace_thread_observer; | |
47 | ||
67b5c0c1 MM |
48 | /* Memory access types used in set/show record btrace replay-memory-access. */ |
49 | static const char replay_memory_access_read_only[] = "read-only"; | |
50 | static const char replay_memory_access_read_write[] = "read-write"; | |
51 | static const char *const replay_memory_access_types[] = | |
52 | { | |
53 | replay_memory_access_read_only, | |
54 | replay_memory_access_read_write, | |
55 | NULL | |
56 | }; | |
57 | ||
58 | /* The currently allowed replay memory access type. */ | |
59 | static const char *replay_memory_access = replay_memory_access_read_only; | |
60 | ||
61 | /* Command lists for "set/show record btrace". */ | |
62 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
63 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
633785ff | 64 | |
70ad5bff MM |
65 | /* The execution direction of the last resume we got. See record-full.c. */ |
66 | static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD; | |
67 | ||
68 | /* The async event handler for reverse/replay execution. */ | |
69 | static struct async_event_handler *record_btrace_async_inferior_event_handler; | |
70 | ||
aef92902 MM |
71 | /* A flag indicating that we are currently generating a core file. */ |
72 | static int record_btrace_generating_corefile; | |
73 | ||
f4abbc16 MM |
74 | /* The current branch trace configuration. */ |
75 | static struct btrace_config record_btrace_conf; | |
76 | ||
77 | /* Command list for "record btrace". */ | |
78 | static struct cmd_list_element *record_btrace_cmdlist; | |
79 | ||
d33501a5 MM |
80 | /* Command lists for "set/show record btrace bts". */ |
81 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
82 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
83 | ||
b20a6524 MM |
84 | /* Command lists for "set/show record btrace pt". */ |
85 | static struct cmd_list_element *set_record_btrace_pt_cmdlist; | |
86 | static struct cmd_list_element *show_record_btrace_pt_cmdlist; | |
87 | ||
afedecd3 MM |
88 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
89 | ambiguities when used in if statements. */ | |
90 | ||
91 | #define DEBUG(msg, args...) \ | |
92 | do \ | |
93 | { \ | |
94 | if (record_debug != 0) \ | |
95 | fprintf_unfiltered (gdb_stdlog, \ | |
96 | "[record-btrace] " msg "\n", ##args); \ | |
97 | } \ | |
98 | while (0) | |
99 | ||
100 | ||
101 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 102 | thread_info. |
afedecd3 MM |
103 | |
104 | Throws an error if there is no thread or no trace. This function never | |
105 | returns NULL. */ | |
106 | ||
066ce621 MM |
107 | static struct thread_info * |
108 | require_btrace_thread (void) | |
afedecd3 MM |
109 | { |
110 | struct thread_info *tp; | |
afedecd3 MM |
111 | |
112 | DEBUG ("require"); | |
113 | ||
114 | tp = find_thread_ptid (inferior_ptid); | |
115 | if (tp == NULL) | |
116 | error (_("No thread.")); | |
117 | ||
118 | btrace_fetch (tp); | |
119 | ||
6e07b1d2 | 120 | if (btrace_is_empty (tp)) |
afedecd3 MM |
121 | error (_("No trace.")); |
122 | ||
066ce621 MM |
123 | return tp; |
124 | } | |
125 | ||
126 | /* Update the branch trace for the current thread and return a pointer to its | |
127 | branch trace information struct. | |
128 | ||
129 | Throws an error if there is no thread or no trace. This function never | |
130 | returns NULL. */ | |
131 | ||
132 | static struct btrace_thread_info * | |
133 | require_btrace (void) | |
134 | { | |
135 | struct thread_info *tp; | |
136 | ||
137 | tp = require_btrace_thread (); | |
138 | ||
139 | return &tp->btrace; | |
afedecd3 MM |
140 | } |
141 | ||
142 | /* Enable branch tracing for one thread. Warn on errors. */ | |
143 | ||
144 | static void | |
145 | record_btrace_enable_warn (struct thread_info *tp) | |
146 | { | |
492d29ea PA |
147 | TRY |
148 | { | |
149 | btrace_enable (tp, &record_btrace_conf); | |
150 | } | |
151 | CATCH (error, RETURN_MASK_ERROR) | |
152 | { | |
153 | warning ("%s", error.message); | |
154 | } | |
155 | END_CATCH | |
afedecd3 MM |
156 | } |
157 | ||
158 | /* Callback function to disable branch tracing for one thread. */ | |
159 | ||
160 | static void | |
161 | record_btrace_disable_callback (void *arg) | |
162 | { | |
19ba03f4 | 163 | struct thread_info *tp = (struct thread_info *) arg; |
afedecd3 MM |
164 | |
165 | btrace_disable (tp); | |
166 | } | |
167 | ||
168 | /* Enable automatic tracing of new threads. */ | |
169 | ||
170 | static void | |
171 | record_btrace_auto_enable (void) | |
172 | { | |
173 | DEBUG ("attach thread observer"); | |
174 | ||
175 | record_btrace_thread_observer | |
176 | = observer_attach_new_thread (record_btrace_enable_warn); | |
177 | } | |
178 | ||
179 | /* Disable automatic tracing of new threads. */ | |
180 | ||
181 | static void | |
182 | record_btrace_auto_disable (void) | |
183 | { | |
184 | /* The observer may have been detached, already. */ | |
185 | if (record_btrace_thread_observer == NULL) | |
186 | return; | |
187 | ||
188 | DEBUG ("detach thread observer"); | |
189 | ||
190 | observer_detach_new_thread (record_btrace_thread_observer); | |
191 | record_btrace_thread_observer = NULL; | |
192 | } | |
193 | ||
70ad5bff MM |
194 | /* The record-btrace async event handler function. */ |
195 | ||
196 | static void | |
197 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
198 | { | |
199 | inferior_event_handler (INF_REG_EVENT, NULL); | |
200 | } | |
201 | ||
afedecd3 MM |
202 | /* The to_open method of target record-btrace. */ |
203 | ||
204 | static void | |
014f9477 | 205 | record_btrace_open (const char *args, int from_tty) |
afedecd3 MM |
206 | { |
207 | struct cleanup *disable_chain; | |
208 | struct thread_info *tp; | |
38b022b4 | 209 | const char *format; |
afedecd3 MM |
210 | |
211 | DEBUG ("open"); | |
212 | ||
8213266a | 213 | record_preopen (); |
afedecd3 MM |
214 | |
215 | if (!target_has_execution) | |
216 | error (_("The program is not being run.")); | |
217 | ||
afedecd3 MM |
218 | gdb_assert (record_btrace_thread_observer == NULL); |
219 | ||
220 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 221 | ALL_NON_EXITED_THREADS (tp) |
5d5658a1 | 222 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num)) |
afedecd3 | 223 | { |
f4abbc16 | 224 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
225 | |
226 | make_cleanup (record_btrace_disable_callback, tp); | |
227 | } | |
228 | ||
229 | record_btrace_auto_enable (); | |
230 | ||
231 | push_target (&record_btrace_ops); | |
232 | ||
70ad5bff MM |
233 | record_btrace_async_inferior_event_handler |
234 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
235 | NULL); | |
aef92902 | 236 | record_btrace_generating_corefile = 0; |
70ad5bff | 237 | |
38b022b4 SM |
238 | format = btrace_format_short_string (record_btrace_conf.format); |
239 | observer_notify_record_changed (current_inferior (), 1, "btrace", format); | |
afedecd3 MM |
240 | |
241 | discard_cleanups (disable_chain); | |
242 | } | |
243 | ||
244 | /* The to_stop_recording method of target record-btrace. */ | |
245 | ||
246 | static void | |
c6cd7c02 | 247 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
248 | { |
249 | struct thread_info *tp; | |
250 | ||
251 | DEBUG ("stop recording"); | |
252 | ||
253 | record_btrace_auto_disable (); | |
254 | ||
034f788c | 255 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
256 | if (tp->btrace.target != NULL) |
257 | btrace_disable (tp); | |
258 | } | |
259 | ||
260 | /* The to_close method of target record-btrace. */ | |
261 | ||
262 | static void | |
de90e03d | 263 | record_btrace_close (struct target_ops *self) |
afedecd3 | 264 | { |
568e808b MM |
265 | struct thread_info *tp; |
266 | ||
70ad5bff MM |
267 | if (record_btrace_async_inferior_event_handler != NULL) |
268 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
269 | ||
99c819ee MM |
270 | /* Make sure automatic recording gets disabled even if we did not stop |
271 | recording before closing the record-btrace target. */ | |
272 | record_btrace_auto_disable (); | |
273 | ||
568e808b MM |
274 | /* We should have already stopped recording. |
275 | Tear down btrace in case we have not. */ | |
034f788c | 276 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 277 | btrace_teardown (tp); |
afedecd3 MM |
278 | } |
279 | ||
b7d2e916 PA |
280 | /* The to_async method of target record-btrace. */ |
281 | ||
282 | static void | |
6a3753b3 | 283 | record_btrace_async (struct target_ops *ops, int enable) |
b7d2e916 | 284 | { |
6a3753b3 | 285 | if (enable) |
b7d2e916 PA |
286 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
287 | else | |
288 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
289 | ||
6a3753b3 | 290 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
291 | } |
292 | ||
d33501a5 MM |
293 | /* Adjusts the size and returns a human readable size suffix. */ |
294 | ||
295 | static const char * | |
296 | record_btrace_adjust_size (unsigned int *size) | |
297 | { | |
298 | unsigned int sz; | |
299 | ||
300 | sz = *size; | |
301 | ||
302 | if ((sz & ((1u << 30) - 1)) == 0) | |
303 | { | |
304 | *size = sz >> 30; | |
305 | return "GB"; | |
306 | } | |
307 | else if ((sz & ((1u << 20) - 1)) == 0) | |
308 | { | |
309 | *size = sz >> 20; | |
310 | return "MB"; | |
311 | } | |
312 | else if ((sz & ((1u << 10) - 1)) == 0) | |
313 | { | |
314 | *size = sz >> 10; | |
315 | return "kB"; | |
316 | } | |
317 | else | |
318 | return ""; | |
319 | } | |
320 | ||
321 | /* Print a BTS configuration. */ | |
322 | ||
323 | static void | |
324 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
325 | { | |
326 | const char *suffix; | |
327 | unsigned int size; | |
328 | ||
329 | size = conf->size; | |
330 | if (size > 0) | |
331 | { | |
332 | suffix = record_btrace_adjust_size (&size); | |
333 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
334 | } | |
335 | } | |
336 | ||
bc504a31 | 337 | /* Print an Intel Processor Trace configuration. */ |
b20a6524 MM |
338 | |
339 | static void | |
340 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
341 | { | |
342 | const char *suffix; | |
343 | unsigned int size; | |
344 | ||
345 | size = conf->size; | |
346 | if (size > 0) | |
347 | { | |
348 | suffix = record_btrace_adjust_size (&size); | |
349 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
350 | } | |
351 | } | |
352 | ||
d33501a5 MM |
353 | /* Print a branch tracing configuration. */ |
354 | ||
355 | static void | |
356 | record_btrace_print_conf (const struct btrace_config *conf) | |
357 | { | |
358 | printf_unfiltered (_("Recording format: %s.\n"), | |
359 | btrace_format_string (conf->format)); | |
360 | ||
361 | switch (conf->format) | |
362 | { | |
363 | case BTRACE_FORMAT_NONE: | |
364 | return; | |
365 | ||
366 | case BTRACE_FORMAT_BTS: | |
367 | record_btrace_print_bts_conf (&conf->bts); | |
368 | return; | |
b20a6524 MM |
369 | |
370 | case BTRACE_FORMAT_PT: | |
371 | record_btrace_print_pt_conf (&conf->pt); | |
372 | return; | |
d33501a5 MM |
373 | } |
374 | ||
375 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
376 | } | |
377 | ||
afedecd3 MM |
378 | /* The to_info_record method of target record-btrace. */ |
379 | ||
380 | static void | |
630d6a4a | 381 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
382 | { |
383 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 384 | const struct btrace_config *conf; |
afedecd3 | 385 | struct thread_info *tp; |
31fd9caa | 386 | unsigned int insns, calls, gaps; |
afedecd3 MM |
387 | |
388 | DEBUG ("info"); | |
389 | ||
390 | tp = find_thread_ptid (inferior_ptid); | |
391 | if (tp == NULL) | |
392 | error (_("No thread.")); | |
393 | ||
f4abbc16 MM |
394 | btinfo = &tp->btrace; |
395 | ||
396 | conf = btrace_conf (btinfo); | |
397 | if (conf != NULL) | |
d33501a5 | 398 | record_btrace_print_conf (conf); |
f4abbc16 | 399 | |
afedecd3 MM |
400 | btrace_fetch (tp); |
401 | ||
23a7fe75 MM |
402 | insns = 0; |
403 | calls = 0; | |
31fd9caa | 404 | gaps = 0; |
23a7fe75 | 405 | |
6e07b1d2 | 406 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
407 | { |
408 | struct btrace_call_iterator call; | |
409 | struct btrace_insn_iterator insn; | |
410 | ||
411 | btrace_call_end (&call, btinfo); | |
412 | btrace_call_prev (&call, 1); | |
5de9129b | 413 | calls = btrace_call_number (&call); |
23a7fe75 MM |
414 | |
415 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 416 | |
5de9129b | 417 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
418 | if (insns != 0) |
419 | { | |
420 | /* The last instruction does not really belong to the trace. */ | |
421 | insns -= 1; | |
422 | } | |
423 | else | |
424 | { | |
425 | unsigned int steps; | |
426 | ||
427 | /* Skip gaps at the end. */ | |
428 | do | |
429 | { | |
430 | steps = btrace_insn_prev (&insn, 1); | |
431 | if (steps == 0) | |
432 | break; | |
433 | ||
434 | insns = btrace_insn_number (&insn); | |
435 | } | |
436 | while (insns == 0); | |
437 | } | |
438 | ||
439 | gaps = btinfo->ngaps; | |
23a7fe75 | 440 | } |
afedecd3 | 441 | |
31fd9caa | 442 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
43792cf0 PA |
443 | "for thread %s (%s).\n"), insns, calls, gaps, |
444 | print_thread_id (tp), target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
445 | |
446 | if (btrace_is_replaying (tp)) | |
447 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
448 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
449 | } |
450 | ||
31fd9caa MM |
451 | /* Print a decode error. */ |
452 | ||
453 | static void | |
454 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
455 | enum btrace_format format) | |
456 | { | |
457 | const char *errstr; | |
458 | int is_error; | |
459 | ||
460 | errstr = _("unknown"); | |
461 | is_error = 1; | |
462 | ||
463 | switch (format) | |
464 | { | |
465 | default: | |
466 | break; | |
467 | ||
468 | case BTRACE_FORMAT_BTS: | |
469 | switch (errcode) | |
470 | { | |
471 | default: | |
472 | break; | |
473 | ||
474 | case BDE_BTS_OVERFLOW: | |
475 | errstr = _("instruction overflow"); | |
476 | break; | |
477 | ||
478 | case BDE_BTS_INSN_SIZE: | |
479 | errstr = _("unknown instruction"); | |
480 | break; | |
481 | } | |
482 | break; | |
b20a6524 MM |
483 | |
484 | #if defined (HAVE_LIBIPT) | |
485 | case BTRACE_FORMAT_PT: | |
486 | switch (errcode) | |
487 | { | |
488 | case BDE_PT_USER_QUIT: | |
489 | is_error = 0; | |
490 | errstr = _("trace decode cancelled"); | |
491 | break; | |
492 | ||
493 | case BDE_PT_DISABLED: | |
494 | is_error = 0; | |
495 | errstr = _("disabled"); | |
496 | break; | |
497 | ||
498 | case BDE_PT_OVERFLOW: | |
499 | is_error = 0; | |
500 | errstr = _("overflow"); | |
501 | break; | |
502 | ||
503 | default: | |
504 | if (errcode < 0) | |
505 | errstr = pt_errstr (pt_errcode (errcode)); | |
506 | break; | |
507 | } | |
508 | break; | |
509 | #endif /* defined (HAVE_LIBIPT) */ | |
31fd9caa MM |
510 | } |
511 | ||
512 | ui_out_text (uiout, _("[")); | |
513 | if (is_error) | |
514 | { | |
515 | ui_out_text (uiout, _("decode error (")); | |
516 | ui_out_field_int (uiout, "errcode", errcode); | |
517 | ui_out_text (uiout, _("): ")); | |
518 | } | |
519 | ui_out_text (uiout, errstr); | |
520 | ui_out_text (uiout, _("]\n")); | |
521 | } | |
522 | ||
afedecd3 MM |
523 | /* Print an unsigned int. */ |
524 | ||
525 | static void | |
526 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
527 | { | |
528 | ui_out_field_fmt (uiout, fld, "%u", val); | |
529 | } | |
530 | ||
f94cc897 MM |
531 | /* A range of source lines. */ |
532 | ||
533 | struct btrace_line_range | |
534 | { | |
535 | /* The symtab this line is from. */ | |
536 | struct symtab *symtab; | |
537 | ||
538 | /* The first line (inclusive). */ | |
539 | int begin; | |
540 | ||
541 | /* The last line (exclusive). */ | |
542 | int end; | |
543 | }; | |
544 | ||
545 | /* Construct a line range. */ | |
546 | ||
547 | static struct btrace_line_range | |
548 | btrace_mk_line_range (struct symtab *symtab, int begin, int end) | |
549 | { | |
550 | struct btrace_line_range range; | |
551 | ||
552 | range.symtab = symtab; | |
553 | range.begin = begin; | |
554 | range.end = end; | |
555 | ||
556 | return range; | |
557 | } | |
558 | ||
559 | /* Add a line to a line range. */ | |
560 | ||
561 | static struct btrace_line_range | |
562 | btrace_line_range_add (struct btrace_line_range range, int line) | |
563 | { | |
564 | if (range.end <= range.begin) | |
565 | { | |
566 | /* This is the first entry. */ | |
567 | range.begin = line; | |
568 | range.end = line + 1; | |
569 | } | |
570 | else if (line < range.begin) | |
571 | range.begin = line; | |
572 | else if (range.end < line) | |
573 | range.end = line; | |
574 | ||
575 | return range; | |
576 | } | |
577 | ||
578 | /* Return non-zero if RANGE is empty, zero otherwise. */ | |
579 | ||
580 | static int | |
581 | btrace_line_range_is_empty (struct btrace_line_range range) | |
582 | { | |
583 | return range.end <= range.begin; | |
584 | } | |
585 | ||
586 | /* Return non-zero if LHS contains RHS, zero otherwise. */ | |
587 | ||
588 | static int | |
589 | btrace_line_range_contains_range (struct btrace_line_range lhs, | |
590 | struct btrace_line_range rhs) | |
591 | { | |
592 | return ((lhs.symtab == rhs.symtab) | |
593 | && (lhs.begin <= rhs.begin) | |
594 | && (rhs.end <= lhs.end)); | |
595 | } | |
596 | ||
597 | /* Find the line range associated with PC. */ | |
598 | ||
599 | static struct btrace_line_range | |
600 | btrace_find_line_range (CORE_ADDR pc) | |
601 | { | |
602 | struct btrace_line_range range; | |
603 | struct linetable_entry *lines; | |
604 | struct linetable *ltable; | |
605 | struct symtab *symtab; | |
606 | int nlines, i; | |
607 | ||
608 | symtab = find_pc_line_symtab (pc); | |
609 | if (symtab == NULL) | |
610 | return btrace_mk_line_range (NULL, 0, 0); | |
611 | ||
612 | ltable = SYMTAB_LINETABLE (symtab); | |
613 | if (ltable == NULL) | |
614 | return btrace_mk_line_range (symtab, 0, 0); | |
615 | ||
616 | nlines = ltable->nitems; | |
617 | lines = ltable->item; | |
618 | if (nlines <= 0) | |
619 | return btrace_mk_line_range (symtab, 0, 0); | |
620 | ||
621 | range = btrace_mk_line_range (symtab, 0, 0); | |
622 | for (i = 0; i < nlines - 1; i++) | |
623 | { | |
624 | if ((lines[i].pc == pc) && (lines[i].line != 0)) | |
625 | range = btrace_line_range_add (range, lines[i].line); | |
626 | } | |
627 | ||
628 | return range; | |
629 | } | |
630 | ||
631 | /* Print source lines in LINES to UIOUT. | |
632 | ||
633 | UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
634 | instructions corresponding to that source line. When printing a new source | |
635 | line, we do the cleanups for the open chain and open a new cleanup chain for | |
636 | the new source line. If the source line range in LINES is not empty, this | |
637 | function will leave the cleanup chain for the last printed source line open | |
638 | so instructions can be added to it. */ | |
639 | ||
640 | static void | |
641 | btrace_print_lines (struct btrace_line_range lines, struct ui_out *uiout, | |
642 | struct cleanup **ui_item_chain, int flags) | |
643 | { | |
8d297bbf | 644 | print_source_lines_flags psl_flags; |
f94cc897 MM |
645 | int line; |
646 | ||
647 | psl_flags = 0; | |
648 | if (flags & DISASSEMBLY_FILENAME) | |
649 | psl_flags |= PRINT_SOURCE_LINES_FILENAME; | |
650 | ||
651 | for (line = lines.begin; line < lines.end; ++line) | |
652 | { | |
653 | if (*ui_item_chain != NULL) | |
654 | do_cleanups (*ui_item_chain); | |
655 | ||
656 | *ui_item_chain | |
657 | = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); | |
658 | ||
659 | print_source_lines (lines.symtab, line, line + 1, psl_flags); | |
660 | ||
661 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
662 | } | |
663 | } | |
664 | ||
afedecd3 MM |
665 | /* Disassemble a section of the recorded instruction trace. */ |
666 | ||
667 | static void | |
23a7fe75 | 668 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 669 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
670 | const struct btrace_insn_iterator *begin, |
671 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 | 672 | { |
f94cc897 MM |
673 | struct ui_file *stb; |
674 | struct cleanup *cleanups, *ui_item_chain; | |
675 | struct disassemble_info di; | |
afedecd3 | 676 | struct gdbarch *gdbarch; |
23a7fe75 | 677 | struct btrace_insn_iterator it; |
f94cc897 | 678 | struct btrace_line_range last_lines; |
afedecd3 | 679 | |
23a7fe75 MM |
680 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
681 | btrace_insn_number (end)); | |
afedecd3 | 682 | |
f94cc897 MM |
683 | flags |= DISASSEMBLY_SPECULATIVE; |
684 | ||
afedecd3 | 685 | gdbarch = target_gdbarch (); |
f94cc897 MM |
686 | stb = mem_fileopen (); |
687 | cleanups = make_cleanup_ui_file_delete (stb); | |
688 | di = gdb_disassemble_info (gdbarch, stb); | |
689 | last_lines = btrace_mk_line_range (NULL, 0, 0); | |
690 | ||
691 | make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); | |
692 | ||
693 | /* UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
694 | instructions corresponding to that line. */ | |
695 | ui_item_chain = NULL; | |
afedecd3 | 696 | |
23a7fe75 | 697 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 698 | { |
23a7fe75 MM |
699 | const struct btrace_insn *insn; |
700 | ||
701 | insn = btrace_insn_get (&it); | |
702 | ||
31fd9caa MM |
703 | /* A NULL instruction indicates a gap in the trace. */ |
704 | if (insn == NULL) | |
705 | { | |
706 | const struct btrace_config *conf; | |
707 | ||
708 | conf = btrace_conf (btinfo); | |
afedecd3 | 709 | |
31fd9caa MM |
710 | /* We have trace so we must have a configuration. */ |
711 | gdb_assert (conf != NULL); | |
712 | ||
713 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
714 | conf->format); | |
715 | } | |
716 | else | |
717 | { | |
f94cc897 | 718 | struct disasm_insn dinsn; |
da8c46d2 | 719 | |
f94cc897 | 720 | if ((flags & DISASSEMBLY_SOURCE) != 0) |
da8c46d2 | 721 | { |
f94cc897 MM |
722 | struct btrace_line_range lines; |
723 | ||
724 | lines = btrace_find_line_range (insn->pc); | |
725 | if (!btrace_line_range_is_empty (lines) | |
726 | && !btrace_line_range_contains_range (last_lines, lines)) | |
727 | { | |
728 | btrace_print_lines (lines, uiout, &ui_item_chain, flags); | |
729 | last_lines = lines; | |
730 | } | |
731 | else if (ui_item_chain == NULL) | |
732 | { | |
733 | ui_item_chain | |
734 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
735 | "src_and_asm_line"); | |
736 | /* No source information. */ | |
737 | make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
738 | } | |
739 | ||
740 | gdb_assert (ui_item_chain != NULL); | |
da8c46d2 | 741 | } |
da8c46d2 | 742 | |
f94cc897 MM |
743 | memset (&dinsn, 0, sizeof (dinsn)); |
744 | dinsn.number = btrace_insn_number (&it); | |
745 | dinsn.addr = insn->pc; | |
31fd9caa | 746 | |
da8c46d2 | 747 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) |
f94cc897 | 748 | dinsn.is_speculative = 1; |
da8c46d2 | 749 | |
f94cc897 | 750 | gdb_pretty_print_insn (gdbarch, uiout, &di, &dinsn, flags, stb); |
31fd9caa | 751 | } |
afedecd3 | 752 | } |
f94cc897 MM |
753 | |
754 | do_cleanups (cleanups); | |
afedecd3 MM |
755 | } |
756 | ||
757 | /* The to_insn_history method of target record-btrace. */ | |
758 | ||
759 | static void | |
7a6c5609 | 760 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
761 | { |
762 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
763 | struct btrace_insn_history *history; |
764 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
765 | struct cleanup *uiout_cleanup; |
766 | struct ui_out *uiout; | |
23a7fe75 | 767 | unsigned int context, covered; |
afedecd3 MM |
768 | |
769 | uiout = current_uiout; | |
770 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
771 | "insn history"); | |
afedecd3 | 772 | context = abs (size); |
afedecd3 MM |
773 | if (context == 0) |
774 | error (_("Bad record instruction-history-size.")); | |
775 | ||
23a7fe75 MM |
776 | btinfo = require_btrace (); |
777 | history = btinfo->insn_history; | |
778 | if (history == NULL) | |
afedecd3 | 779 | { |
07bbe694 | 780 | struct btrace_insn_iterator *replay; |
afedecd3 | 781 | |
23a7fe75 | 782 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 783 | |
07bbe694 MM |
784 | /* If we're replaying, we start at the replay position. Otherwise, we |
785 | start at the tail of the trace. */ | |
786 | replay = btinfo->replay; | |
787 | if (replay != NULL) | |
788 | begin = *replay; | |
789 | else | |
790 | btrace_insn_end (&begin, btinfo); | |
791 | ||
792 | /* We start from here and expand in the requested direction. Then we | |
793 | expand in the other direction, as well, to fill up any remaining | |
794 | context. */ | |
795 | end = begin; | |
796 | if (size < 0) | |
797 | { | |
798 | /* We want the current position covered, as well. */ | |
799 | covered = btrace_insn_next (&end, 1); | |
800 | covered += btrace_insn_prev (&begin, context - covered); | |
801 | covered += btrace_insn_next (&end, context - covered); | |
802 | } | |
803 | else | |
804 | { | |
805 | covered = btrace_insn_next (&end, context); | |
806 | covered += btrace_insn_prev (&begin, context - covered); | |
807 | } | |
afedecd3 MM |
808 | } |
809 | else | |
810 | { | |
23a7fe75 MM |
811 | begin = history->begin; |
812 | end = history->end; | |
afedecd3 | 813 | |
23a7fe75 MM |
814 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
815 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 816 | |
23a7fe75 MM |
817 | if (size < 0) |
818 | { | |
819 | end = begin; | |
820 | covered = btrace_insn_prev (&begin, context); | |
821 | } | |
822 | else | |
823 | { | |
824 | begin = end; | |
825 | covered = btrace_insn_next (&end, context); | |
826 | } | |
afedecd3 MM |
827 | } |
828 | ||
23a7fe75 | 829 | if (covered > 0) |
31fd9caa | 830 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
831 | else |
832 | { | |
833 | if (size < 0) | |
834 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
835 | else | |
836 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
837 | } | |
afedecd3 | 838 | |
23a7fe75 | 839 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
840 | do_cleanups (uiout_cleanup); |
841 | } | |
842 | ||
843 | /* The to_insn_history_range method of target record-btrace. */ | |
844 | ||
845 | static void | |
4e99c6b7 TT |
846 | record_btrace_insn_history_range (struct target_ops *self, |
847 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
848 | { |
849 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
850 | struct btrace_insn_history *history; |
851 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
852 | struct cleanup *uiout_cleanup; |
853 | struct ui_out *uiout; | |
23a7fe75 MM |
854 | unsigned int low, high; |
855 | int found; | |
afedecd3 MM |
856 | |
857 | uiout = current_uiout; | |
858 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
859 | "insn history"); | |
23a7fe75 MM |
860 | low = from; |
861 | high = to; | |
afedecd3 | 862 | |
23a7fe75 | 863 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
864 | |
865 | /* Check for wrap-arounds. */ | |
23a7fe75 | 866 | if (low != from || high != to) |
afedecd3 MM |
867 | error (_("Bad range.")); |
868 | ||
0688d04e | 869 | if (high < low) |
afedecd3 MM |
870 | error (_("Bad range.")); |
871 | ||
23a7fe75 | 872 | btinfo = require_btrace (); |
afedecd3 | 873 | |
23a7fe75 MM |
874 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
875 | if (found == 0) | |
876 | error (_("Range out of bounds.")); | |
afedecd3 | 877 | |
23a7fe75 MM |
878 | found = btrace_find_insn_by_number (&end, btinfo, high); |
879 | if (found == 0) | |
0688d04e MM |
880 | { |
881 | /* Silently truncate the range. */ | |
882 | btrace_insn_end (&end, btinfo); | |
883 | } | |
884 | else | |
885 | { | |
886 | /* We want both begin and end to be inclusive. */ | |
887 | btrace_insn_next (&end, 1); | |
888 | } | |
afedecd3 | 889 | |
31fd9caa | 890 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 891 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
892 | |
893 | do_cleanups (uiout_cleanup); | |
894 | } | |
895 | ||
896 | /* The to_insn_history_from method of target record-btrace. */ | |
897 | ||
898 | static void | |
9abc3ff3 TT |
899 | record_btrace_insn_history_from (struct target_ops *self, |
900 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
901 | { |
902 | ULONGEST begin, end, context; | |
903 | ||
904 | context = abs (size); | |
0688d04e MM |
905 | if (context == 0) |
906 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
907 | |
908 | if (size < 0) | |
909 | { | |
910 | end = from; | |
911 | ||
912 | if (from < context) | |
913 | begin = 0; | |
914 | else | |
0688d04e | 915 | begin = from - context + 1; |
afedecd3 MM |
916 | } |
917 | else | |
918 | { | |
919 | begin = from; | |
0688d04e | 920 | end = from + context - 1; |
afedecd3 MM |
921 | |
922 | /* Check for wrap-around. */ | |
923 | if (end < begin) | |
924 | end = ULONGEST_MAX; | |
925 | } | |
926 | ||
4e99c6b7 | 927 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
928 | } |
929 | ||
930 | /* Print the instruction number range for a function call history line. */ | |
931 | ||
932 | static void | |
23a7fe75 MM |
933 | btrace_call_history_insn_range (struct ui_out *uiout, |
934 | const struct btrace_function *bfun) | |
afedecd3 | 935 | { |
7acbe133 MM |
936 | unsigned int begin, end, size; |
937 | ||
938 | size = VEC_length (btrace_insn_s, bfun->insn); | |
939 | gdb_assert (size > 0); | |
afedecd3 | 940 | |
23a7fe75 | 941 | begin = bfun->insn_offset; |
7acbe133 | 942 | end = begin + size - 1; |
afedecd3 | 943 | |
23a7fe75 | 944 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 945 | ui_out_text (uiout, ","); |
23a7fe75 | 946 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
947 | } |
948 | ||
ce0dfbea MM |
949 | /* Compute the lowest and highest source line for the instructions in BFUN |
950 | and return them in PBEGIN and PEND. | |
951 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
952 | result from inlining or macro expansion. */ | |
953 | ||
954 | static void | |
955 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
956 | int *pbegin, int *pend) | |
957 | { | |
958 | struct btrace_insn *insn; | |
959 | struct symtab *symtab; | |
960 | struct symbol *sym; | |
961 | unsigned int idx; | |
962 | int begin, end; | |
963 | ||
964 | begin = INT_MAX; | |
965 | end = INT_MIN; | |
966 | ||
967 | sym = bfun->sym; | |
968 | if (sym == NULL) | |
969 | goto out; | |
970 | ||
971 | symtab = symbol_symtab (sym); | |
972 | ||
973 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
974 | { | |
975 | struct symtab_and_line sal; | |
976 | ||
977 | sal = find_pc_line (insn->pc, 0); | |
978 | if (sal.symtab != symtab || sal.line == 0) | |
979 | continue; | |
980 | ||
981 | begin = min (begin, sal.line); | |
982 | end = max (end, sal.line); | |
983 | } | |
984 | ||
985 | out: | |
986 | *pbegin = begin; | |
987 | *pend = end; | |
988 | } | |
989 | ||
afedecd3 MM |
990 | /* Print the source line information for a function call history line. */ |
991 | ||
992 | static void | |
23a7fe75 MM |
993 | btrace_call_history_src_line (struct ui_out *uiout, |
994 | const struct btrace_function *bfun) | |
afedecd3 MM |
995 | { |
996 | struct symbol *sym; | |
23a7fe75 | 997 | int begin, end; |
afedecd3 MM |
998 | |
999 | sym = bfun->sym; | |
1000 | if (sym == NULL) | |
1001 | return; | |
1002 | ||
1003 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 1004 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 1005 | |
ce0dfbea | 1006 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 1007 | if (end < begin) |
afedecd3 MM |
1008 | return; |
1009 | ||
1010 | ui_out_text (uiout, ":"); | |
23a7fe75 | 1011 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 1012 | |
23a7fe75 | 1013 | if (end == begin) |
afedecd3 MM |
1014 | return; |
1015 | ||
8710b709 | 1016 | ui_out_text (uiout, ","); |
23a7fe75 | 1017 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
1018 | } |
1019 | ||
0b722aec MM |
1020 | /* Get the name of a branch trace function. */ |
1021 | ||
1022 | static const char * | |
1023 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
1024 | { | |
1025 | struct minimal_symbol *msym; | |
1026 | struct symbol *sym; | |
1027 | ||
1028 | if (bfun == NULL) | |
1029 | return "??"; | |
1030 | ||
1031 | msym = bfun->msym; | |
1032 | sym = bfun->sym; | |
1033 | ||
1034 | if (sym != NULL) | |
1035 | return SYMBOL_PRINT_NAME (sym); | |
1036 | else if (msym != NULL) | |
efd66ac6 | 1037 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
1038 | else |
1039 | return "??"; | |
1040 | } | |
1041 | ||
afedecd3 MM |
1042 | /* Disassemble a section of the recorded function trace. */ |
1043 | ||
1044 | static void | |
23a7fe75 | 1045 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 1046 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
1047 | const struct btrace_call_iterator *begin, |
1048 | const struct btrace_call_iterator *end, | |
8d297bbf | 1049 | int int_flags) |
afedecd3 | 1050 | { |
23a7fe75 | 1051 | struct btrace_call_iterator it; |
8d297bbf | 1052 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 | 1053 | |
8d297bbf | 1054 | DEBUG ("ftrace (0x%x): [%u; %u)", int_flags, btrace_call_number (begin), |
23a7fe75 | 1055 | btrace_call_number (end)); |
afedecd3 | 1056 | |
23a7fe75 | 1057 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 1058 | { |
23a7fe75 MM |
1059 | const struct btrace_function *bfun; |
1060 | struct minimal_symbol *msym; | |
1061 | struct symbol *sym; | |
1062 | ||
1063 | bfun = btrace_call_get (&it); | |
23a7fe75 | 1064 | sym = bfun->sym; |
0b722aec | 1065 | msym = bfun->msym; |
23a7fe75 | 1066 | |
afedecd3 | 1067 | /* Print the function index. */ |
23a7fe75 | 1068 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
1069 | ui_out_text (uiout, "\t"); |
1070 | ||
31fd9caa MM |
1071 | /* Indicate gaps in the trace. */ |
1072 | if (bfun->errcode != 0) | |
1073 | { | |
1074 | const struct btrace_config *conf; | |
1075 | ||
1076 | conf = btrace_conf (btinfo); | |
1077 | ||
1078 | /* We have trace so we must have a configuration. */ | |
1079 | gdb_assert (conf != NULL); | |
1080 | ||
1081 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
1082 | ||
1083 | continue; | |
1084 | } | |
1085 | ||
8710b709 MM |
1086 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
1087 | { | |
1088 | int level = bfun->level + btinfo->level, i; | |
1089 | ||
1090 | for (i = 0; i < level; ++i) | |
1091 | ui_out_text (uiout, " "); | |
1092 | } | |
1093 | ||
1094 | if (sym != NULL) | |
1095 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
1096 | else if (msym != NULL) | |
efd66ac6 | 1097 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
1098 | else if (!ui_out_is_mi_like_p (uiout)) |
1099 | ui_out_field_string (uiout, "function", "??"); | |
1100 | ||
1e038f67 | 1101 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 1102 | { |
8710b709 | 1103 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 1104 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
1105 | } |
1106 | ||
1e038f67 | 1107 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 1108 | { |
8710b709 | 1109 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 1110 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
1111 | } |
1112 | ||
afedecd3 MM |
1113 | ui_out_text (uiout, "\n"); |
1114 | } | |
1115 | } | |
1116 | ||
1117 | /* The to_call_history method of target record-btrace. */ | |
1118 | ||
1119 | static void | |
8d297bbf | 1120 | record_btrace_call_history (struct target_ops *self, int size, int int_flags) |
afedecd3 MM |
1121 | { |
1122 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1123 | struct btrace_call_history *history; |
1124 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1125 | struct cleanup *uiout_cleanup; |
1126 | struct ui_out *uiout; | |
23a7fe75 | 1127 | unsigned int context, covered; |
8d297bbf | 1128 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1129 | |
1130 | uiout = current_uiout; | |
1131 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1132 | "insn history"); | |
afedecd3 | 1133 | context = abs (size); |
afedecd3 MM |
1134 | if (context == 0) |
1135 | error (_("Bad record function-call-history-size.")); | |
1136 | ||
23a7fe75 MM |
1137 | btinfo = require_btrace (); |
1138 | history = btinfo->call_history; | |
1139 | if (history == NULL) | |
afedecd3 | 1140 | { |
07bbe694 | 1141 | struct btrace_insn_iterator *replay; |
afedecd3 | 1142 | |
8d297bbf | 1143 | DEBUG ("call-history (0x%x): %d", int_flags, size); |
afedecd3 | 1144 | |
07bbe694 MM |
1145 | /* If we're replaying, we start at the replay position. Otherwise, we |
1146 | start at the tail of the trace. */ | |
1147 | replay = btinfo->replay; | |
1148 | if (replay != NULL) | |
1149 | { | |
1150 | begin.function = replay->function; | |
1151 | begin.btinfo = btinfo; | |
1152 | } | |
1153 | else | |
1154 | btrace_call_end (&begin, btinfo); | |
1155 | ||
1156 | /* We start from here and expand in the requested direction. Then we | |
1157 | expand in the other direction, as well, to fill up any remaining | |
1158 | context. */ | |
1159 | end = begin; | |
1160 | if (size < 0) | |
1161 | { | |
1162 | /* We want the current position covered, as well. */ | |
1163 | covered = btrace_call_next (&end, 1); | |
1164 | covered += btrace_call_prev (&begin, context - covered); | |
1165 | covered += btrace_call_next (&end, context - covered); | |
1166 | } | |
1167 | else | |
1168 | { | |
1169 | covered = btrace_call_next (&end, context); | |
1170 | covered += btrace_call_prev (&begin, context- covered); | |
1171 | } | |
afedecd3 MM |
1172 | } |
1173 | else | |
1174 | { | |
23a7fe75 MM |
1175 | begin = history->begin; |
1176 | end = history->end; | |
afedecd3 | 1177 | |
8d297bbf | 1178 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", int_flags, size, |
23a7fe75 | 1179 | btrace_call_number (&begin), btrace_call_number (&end)); |
afedecd3 | 1180 | |
23a7fe75 MM |
1181 | if (size < 0) |
1182 | { | |
1183 | end = begin; | |
1184 | covered = btrace_call_prev (&begin, context); | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | begin = end; | |
1189 | covered = btrace_call_next (&end, context); | |
1190 | } | |
afedecd3 MM |
1191 | } |
1192 | ||
23a7fe75 | 1193 | if (covered > 0) |
8710b709 | 1194 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1195 | else |
1196 | { | |
1197 | if (size < 0) | |
1198 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
1199 | else | |
1200 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
1201 | } | |
afedecd3 | 1202 | |
23a7fe75 | 1203 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1204 | do_cleanups (uiout_cleanup); |
1205 | } | |
1206 | ||
1207 | /* The to_call_history_range method of target record-btrace. */ | |
1208 | ||
1209 | static void | |
f0d960ea | 1210 | record_btrace_call_history_range (struct target_ops *self, |
8d297bbf PA |
1211 | ULONGEST from, ULONGEST to, |
1212 | int int_flags) | |
afedecd3 MM |
1213 | { |
1214 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1215 | struct btrace_call_history *history; |
1216 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1217 | struct cleanup *uiout_cleanup; |
1218 | struct ui_out *uiout; | |
23a7fe75 MM |
1219 | unsigned int low, high; |
1220 | int found; | |
8d297bbf | 1221 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1222 | |
1223 | uiout = current_uiout; | |
1224 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1225 | "func history"); | |
23a7fe75 MM |
1226 | low = from; |
1227 | high = to; | |
afedecd3 | 1228 | |
8d297bbf | 1229 | DEBUG ("call-history (0x%x): [%u; %u)", int_flags, low, high); |
afedecd3 MM |
1230 | |
1231 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1232 | if (low != from || high != to) |
afedecd3 MM |
1233 | error (_("Bad range.")); |
1234 | ||
0688d04e | 1235 | if (high < low) |
afedecd3 MM |
1236 | error (_("Bad range.")); |
1237 | ||
23a7fe75 | 1238 | btinfo = require_btrace (); |
afedecd3 | 1239 | |
23a7fe75 MM |
1240 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1241 | if (found == 0) | |
1242 | error (_("Range out of bounds.")); | |
afedecd3 | 1243 | |
23a7fe75 MM |
1244 | found = btrace_find_call_by_number (&end, btinfo, high); |
1245 | if (found == 0) | |
0688d04e MM |
1246 | { |
1247 | /* Silently truncate the range. */ | |
1248 | btrace_call_end (&end, btinfo); | |
1249 | } | |
1250 | else | |
1251 | { | |
1252 | /* We want both begin and end to be inclusive. */ | |
1253 | btrace_call_next (&end, 1); | |
1254 | } | |
afedecd3 | 1255 | |
8710b709 | 1256 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1257 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1258 | |
1259 | do_cleanups (uiout_cleanup); | |
1260 | } | |
1261 | ||
1262 | /* The to_call_history_from method of target record-btrace. */ | |
1263 | ||
1264 | static void | |
ec0aea04 | 1265 | record_btrace_call_history_from (struct target_ops *self, |
8d297bbf PA |
1266 | ULONGEST from, int size, |
1267 | int int_flags) | |
afedecd3 MM |
1268 | { |
1269 | ULONGEST begin, end, context; | |
8d297bbf | 1270 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 MM |
1271 | |
1272 | context = abs (size); | |
0688d04e MM |
1273 | if (context == 0) |
1274 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1275 | |
1276 | if (size < 0) | |
1277 | { | |
1278 | end = from; | |
1279 | ||
1280 | if (from < context) | |
1281 | begin = 0; | |
1282 | else | |
0688d04e | 1283 | begin = from - context + 1; |
afedecd3 MM |
1284 | } |
1285 | else | |
1286 | { | |
1287 | begin = from; | |
0688d04e | 1288 | end = from + context - 1; |
afedecd3 MM |
1289 | |
1290 | /* Check for wrap-around. */ | |
1291 | if (end < begin) | |
1292 | end = ULONGEST_MAX; | |
1293 | } | |
1294 | ||
f0d960ea | 1295 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1296 | } |
1297 | ||
07bbe694 MM |
1298 | /* The to_record_is_replaying method of target record-btrace. */ |
1299 | ||
1300 | static int | |
a52eab48 | 1301 | record_btrace_is_replaying (struct target_ops *self, ptid_t ptid) |
07bbe694 MM |
1302 | { |
1303 | struct thread_info *tp; | |
1304 | ||
034f788c | 1305 | ALL_NON_EXITED_THREADS (tp) |
a52eab48 | 1306 | if (ptid_match (tp->ptid, ptid) && btrace_is_replaying (tp)) |
07bbe694 MM |
1307 | return 1; |
1308 | ||
1309 | return 0; | |
1310 | } | |
1311 | ||
7ff27e9b MM |
1312 | /* The to_record_will_replay method of target record-btrace. */ |
1313 | ||
1314 | static int | |
1315 | record_btrace_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1316 | { | |
1317 | return dir == EXEC_REVERSE || record_btrace_is_replaying (self, ptid); | |
1318 | } | |
1319 | ||
633785ff MM |
1320 | /* The to_xfer_partial method of target record-btrace. */ |
1321 | ||
9b409511 | 1322 | static enum target_xfer_status |
633785ff MM |
1323 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1324 | const char *annex, gdb_byte *readbuf, | |
1325 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1326 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1327 | { |
1328 | struct target_ops *t; | |
1329 | ||
1330 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1331 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1332 | && !record_btrace_generating_corefile |
4d10e986 | 1333 | && record_btrace_is_replaying (ops, inferior_ptid)) |
633785ff MM |
1334 | { |
1335 | switch (object) | |
1336 | { | |
1337 | case TARGET_OBJECT_MEMORY: | |
1338 | { | |
1339 | struct target_section *section; | |
1340 | ||
1341 | /* We do not allow writing memory in general. */ | |
1342 | if (writebuf != NULL) | |
9b409511 YQ |
1343 | { |
1344 | *xfered_len = len; | |
bc113b4e | 1345 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1346 | } |
633785ff MM |
1347 | |
1348 | /* We allow reading readonly memory. */ | |
1349 | section = target_section_by_addr (ops, offset); | |
1350 | if (section != NULL) | |
1351 | { | |
1352 | /* Check if the section we found is readonly. */ | |
1353 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1354 | section->the_bfd_section) | |
1355 | & SEC_READONLY) != 0) | |
1356 | { | |
1357 | /* Truncate the request to fit into this section. */ | |
1358 | len = min (len, section->endaddr - offset); | |
1359 | break; | |
1360 | } | |
1361 | } | |
1362 | ||
9b409511 | 1363 | *xfered_len = len; |
bc113b4e | 1364 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1365 | } |
1366 | } | |
1367 | } | |
1368 | ||
1369 | /* Forward the request. */ | |
e75fdfca TT |
1370 | ops = ops->beneath; |
1371 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1372 | offset, len, xfered_len); | |
633785ff MM |
1373 | } |
1374 | ||
1375 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1376 | ||
1377 | static int | |
1378 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1379 | struct gdbarch *gdbarch, | |
1380 | struct bp_target_info *bp_tgt) | |
1381 | { | |
67b5c0c1 MM |
1382 | const char *old; |
1383 | int ret; | |
633785ff MM |
1384 | |
1385 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1386 | duration of this function. */ | |
67b5c0c1 MM |
1387 | old = replay_memory_access; |
1388 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1389 | |
1390 | ret = 0; | |
492d29ea PA |
1391 | TRY |
1392 | { | |
1393 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1394 | } | |
492d29ea PA |
1395 | CATCH (except, RETURN_MASK_ALL) |
1396 | { | |
6c63c96a | 1397 | replay_memory_access = old; |
492d29ea PA |
1398 | throw_exception (except); |
1399 | } | |
1400 | END_CATCH | |
6c63c96a | 1401 | replay_memory_access = old; |
633785ff MM |
1402 | |
1403 | return ret; | |
1404 | } | |
1405 | ||
1406 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1407 | ||
1408 | static int | |
1409 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1410 | struct gdbarch *gdbarch, | |
1411 | struct bp_target_info *bp_tgt) | |
1412 | { | |
67b5c0c1 MM |
1413 | const char *old; |
1414 | int ret; | |
633785ff MM |
1415 | |
1416 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1417 | duration of this function. */ | |
67b5c0c1 MM |
1418 | old = replay_memory_access; |
1419 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1420 | |
1421 | ret = 0; | |
492d29ea PA |
1422 | TRY |
1423 | { | |
1424 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1425 | } | |
492d29ea PA |
1426 | CATCH (except, RETURN_MASK_ALL) |
1427 | { | |
6c63c96a | 1428 | replay_memory_access = old; |
492d29ea PA |
1429 | throw_exception (except); |
1430 | } | |
1431 | END_CATCH | |
6c63c96a | 1432 | replay_memory_access = old; |
633785ff MM |
1433 | |
1434 | return ret; | |
1435 | } | |
1436 | ||
1f3ef581 MM |
1437 | /* The to_fetch_registers method of target record-btrace. */ |
1438 | ||
1439 | static void | |
1440 | record_btrace_fetch_registers (struct target_ops *ops, | |
1441 | struct regcache *regcache, int regno) | |
1442 | { | |
1443 | struct btrace_insn_iterator *replay; | |
1444 | struct thread_info *tp; | |
1445 | ||
1446 | tp = find_thread_ptid (inferior_ptid); | |
1447 | gdb_assert (tp != NULL); | |
1448 | ||
1449 | replay = tp->btrace.replay; | |
aef92902 | 1450 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1451 | { |
1452 | const struct btrace_insn *insn; | |
1453 | struct gdbarch *gdbarch; | |
1454 | int pcreg; | |
1455 | ||
1456 | gdbarch = get_regcache_arch (regcache); | |
1457 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1458 | if (pcreg < 0) | |
1459 | return; | |
1460 | ||
1461 | /* We can only provide the PC register. */ | |
1462 | if (regno >= 0 && regno != pcreg) | |
1463 | return; | |
1464 | ||
1465 | insn = btrace_insn_get (replay); | |
1466 | gdb_assert (insn != NULL); | |
1467 | ||
1468 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1469 | } | |
1470 | else | |
1471 | { | |
e75fdfca | 1472 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1473 | |
e75fdfca | 1474 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1475 | } |
1476 | } | |
1477 | ||
1478 | /* The to_store_registers method of target record-btrace. */ | |
1479 | ||
1480 | static void | |
1481 | record_btrace_store_registers (struct target_ops *ops, | |
1482 | struct regcache *regcache, int regno) | |
1483 | { | |
1484 | struct target_ops *t; | |
1485 | ||
a52eab48 | 1486 | if (!record_btrace_generating_corefile |
4d10e986 MM |
1487 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1488 | error (_("Cannot write registers while replaying.")); | |
1f3ef581 MM |
1489 | |
1490 | gdb_assert (may_write_registers != 0); | |
1491 | ||
e75fdfca TT |
1492 | t = ops->beneath; |
1493 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1494 | } |
1495 | ||
1496 | /* The to_prepare_to_store method of target record-btrace. */ | |
1497 | ||
1498 | static void | |
1499 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1500 | struct regcache *regcache) | |
1501 | { | |
1502 | struct target_ops *t; | |
1503 | ||
a52eab48 | 1504 | if (!record_btrace_generating_corefile |
4d10e986 | 1505 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1f3ef581 MM |
1506 | return; |
1507 | ||
e75fdfca TT |
1508 | t = ops->beneath; |
1509 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1510 | } |
1511 | ||
0b722aec MM |
1512 | /* The branch trace frame cache. */ |
1513 | ||
1514 | struct btrace_frame_cache | |
1515 | { | |
1516 | /* The thread. */ | |
1517 | struct thread_info *tp; | |
1518 | ||
1519 | /* The frame info. */ | |
1520 | struct frame_info *frame; | |
1521 | ||
1522 | /* The branch trace function segment. */ | |
1523 | const struct btrace_function *bfun; | |
1524 | }; | |
1525 | ||
1526 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1527 | ||
1528 | static htab_t bfcache; | |
1529 | ||
1530 | /* hash_f for htab_create_alloc of bfcache. */ | |
1531 | ||
1532 | static hashval_t | |
1533 | bfcache_hash (const void *arg) | |
1534 | { | |
19ba03f4 SM |
1535 | const struct btrace_frame_cache *cache |
1536 | = (const struct btrace_frame_cache *) arg; | |
0b722aec MM |
1537 | |
1538 | return htab_hash_pointer (cache->frame); | |
1539 | } | |
1540 | ||
1541 | /* eq_f for htab_create_alloc of bfcache. */ | |
1542 | ||
1543 | static int | |
1544 | bfcache_eq (const void *arg1, const void *arg2) | |
1545 | { | |
19ba03f4 SM |
1546 | const struct btrace_frame_cache *cache1 |
1547 | = (const struct btrace_frame_cache *) arg1; | |
1548 | const struct btrace_frame_cache *cache2 | |
1549 | = (const struct btrace_frame_cache *) arg2; | |
0b722aec MM |
1550 | |
1551 | return cache1->frame == cache2->frame; | |
1552 | } | |
1553 | ||
1554 | /* Create a new btrace frame cache. */ | |
1555 | ||
1556 | static struct btrace_frame_cache * | |
1557 | bfcache_new (struct frame_info *frame) | |
1558 | { | |
1559 | struct btrace_frame_cache *cache; | |
1560 | void **slot; | |
1561 | ||
1562 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1563 | cache->frame = frame; | |
1564 | ||
1565 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1566 | gdb_assert (*slot == NULL); | |
1567 | *slot = cache; | |
1568 | ||
1569 | return cache; | |
1570 | } | |
1571 | ||
1572 | /* Extract the branch trace function from a branch trace frame. */ | |
1573 | ||
1574 | static const struct btrace_function * | |
1575 | btrace_get_frame_function (struct frame_info *frame) | |
1576 | { | |
1577 | const struct btrace_frame_cache *cache; | |
1578 | const struct btrace_function *bfun; | |
1579 | struct btrace_frame_cache pattern; | |
1580 | void **slot; | |
1581 | ||
1582 | pattern.frame = frame; | |
1583 | ||
1584 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1585 | if (slot == NULL) | |
1586 | return NULL; | |
1587 | ||
19ba03f4 | 1588 | cache = (const struct btrace_frame_cache *) *slot; |
0b722aec MM |
1589 | return cache->bfun; |
1590 | } | |
1591 | ||
cecac1ab MM |
1592 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1593 | ||
1594 | static enum unwind_stop_reason | |
1595 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1596 | void **this_cache) | |
1597 | { | |
0b722aec MM |
1598 | const struct btrace_frame_cache *cache; |
1599 | const struct btrace_function *bfun; | |
1600 | ||
19ba03f4 | 1601 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1602 | bfun = cache->bfun; |
1603 | gdb_assert (bfun != NULL); | |
1604 | ||
1605 | if (bfun->up == NULL) | |
1606 | return UNWIND_UNAVAILABLE; | |
1607 | ||
1608 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1609 | } |
1610 | ||
1611 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1612 | ||
1613 | static void | |
1614 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1615 | struct frame_id *this_id) | |
1616 | { | |
0b722aec MM |
1617 | const struct btrace_frame_cache *cache; |
1618 | const struct btrace_function *bfun; | |
1619 | CORE_ADDR code, special; | |
1620 | ||
19ba03f4 | 1621 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1622 | |
1623 | bfun = cache->bfun; | |
1624 | gdb_assert (bfun != NULL); | |
1625 | ||
1626 | while (bfun->segment.prev != NULL) | |
1627 | bfun = bfun->segment.prev; | |
1628 | ||
1629 | code = get_frame_func (this_frame); | |
1630 | special = bfun->number; | |
1631 | ||
1632 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1633 | ||
1634 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1635 | btrace_get_bfun_name (cache->bfun), | |
1636 | core_addr_to_string_nz (this_id->code_addr), | |
1637 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1638 | } |
1639 | ||
1640 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1641 | ||
1642 | static struct value * | |
1643 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1644 | void **this_cache, | |
1645 | int regnum) | |
1646 | { | |
0b722aec MM |
1647 | const struct btrace_frame_cache *cache; |
1648 | const struct btrace_function *bfun, *caller; | |
1649 | const struct btrace_insn *insn; | |
1650 | struct gdbarch *gdbarch; | |
1651 | CORE_ADDR pc; | |
1652 | int pcreg; | |
1653 | ||
1654 | gdbarch = get_frame_arch (this_frame); | |
1655 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1656 | if (pcreg < 0 || regnum != pcreg) | |
1657 | throw_error (NOT_AVAILABLE_ERROR, | |
1658 | _("Registers are not available in btrace record history")); | |
1659 | ||
19ba03f4 | 1660 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1661 | bfun = cache->bfun; |
1662 | gdb_assert (bfun != NULL); | |
1663 | ||
1664 | caller = bfun->up; | |
1665 | if (caller == NULL) | |
1666 | throw_error (NOT_AVAILABLE_ERROR, | |
1667 | _("No caller in btrace record history")); | |
1668 | ||
1669 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1670 | { | |
1671 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1672 | pc = insn->pc; | |
1673 | } | |
1674 | else | |
1675 | { | |
1676 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1677 | pc = insn->pc; | |
1678 | ||
1679 | pc += gdb_insn_length (gdbarch, pc); | |
1680 | } | |
1681 | ||
1682 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1683 | btrace_get_bfun_name (bfun), bfun->level, | |
1684 | core_addr_to_string_nz (pc)); | |
1685 | ||
1686 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1687 | } |
1688 | ||
1689 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1690 | ||
1691 | static int | |
1692 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1693 | struct frame_info *this_frame, | |
1694 | void **this_cache) | |
1695 | { | |
0b722aec MM |
1696 | const struct btrace_function *bfun; |
1697 | struct btrace_frame_cache *cache; | |
cecac1ab | 1698 | struct thread_info *tp; |
0b722aec | 1699 | struct frame_info *next; |
cecac1ab MM |
1700 | |
1701 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1702 | tp = find_thread_ptid (inferior_ptid); | |
1703 | gdb_assert (tp != NULL); | |
1704 | ||
0b722aec MM |
1705 | bfun = NULL; |
1706 | next = get_next_frame (this_frame); | |
1707 | if (next == NULL) | |
1708 | { | |
1709 | const struct btrace_insn_iterator *replay; | |
1710 | ||
1711 | replay = tp->btrace.replay; | |
1712 | if (replay != NULL) | |
1713 | bfun = replay->function; | |
1714 | } | |
1715 | else | |
1716 | { | |
1717 | const struct btrace_function *callee; | |
1718 | ||
1719 | callee = btrace_get_frame_function (next); | |
1720 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1721 | bfun = callee->up; | |
1722 | } | |
1723 | ||
1724 | if (bfun == NULL) | |
1725 | return 0; | |
1726 | ||
1727 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1728 | btrace_get_bfun_name (bfun), bfun->level); | |
1729 | ||
1730 | /* This is our frame. Initialize the frame cache. */ | |
1731 | cache = bfcache_new (this_frame); | |
1732 | cache->tp = tp; | |
1733 | cache->bfun = bfun; | |
1734 | ||
1735 | *this_cache = cache; | |
1736 | return 1; | |
1737 | } | |
1738 | ||
1739 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1740 | ||
1741 | static int | |
1742 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1743 | struct frame_info *this_frame, | |
1744 | void **this_cache) | |
1745 | { | |
1746 | const struct btrace_function *bfun, *callee; | |
1747 | struct btrace_frame_cache *cache; | |
1748 | struct frame_info *next; | |
1749 | ||
1750 | next = get_next_frame (this_frame); | |
1751 | if (next == NULL) | |
1752 | return 0; | |
1753 | ||
1754 | callee = btrace_get_frame_function (next); | |
1755 | if (callee == NULL) | |
1756 | return 0; | |
1757 | ||
1758 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1759 | return 0; | |
1760 | ||
1761 | bfun = callee->up; | |
1762 | if (bfun == NULL) | |
1763 | return 0; | |
1764 | ||
1765 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1766 | btrace_get_bfun_name (bfun), bfun->level); | |
1767 | ||
1768 | /* This is our frame. Initialize the frame cache. */ | |
1769 | cache = bfcache_new (this_frame); | |
1770 | cache->tp = find_thread_ptid (inferior_ptid); | |
1771 | cache->bfun = bfun; | |
1772 | ||
1773 | *this_cache = cache; | |
1774 | return 1; | |
1775 | } | |
1776 | ||
1777 | static void | |
1778 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1779 | { | |
1780 | struct btrace_frame_cache *cache; | |
1781 | void **slot; | |
1782 | ||
19ba03f4 | 1783 | cache = (struct btrace_frame_cache *) this_cache; |
0b722aec MM |
1784 | |
1785 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1786 | gdb_assert (slot != NULL); | |
1787 | ||
1788 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1789 | } |
1790 | ||
1791 | /* btrace recording does not store previous memory content, neither the stack | |
1792 | frames content. Any unwinding would return errorneous results as the stack | |
1793 | contents no longer matches the changed PC value restored from history. | |
1794 | Therefore this unwinder reports any possibly unwound registers as | |
1795 | <unavailable>. */ | |
1796 | ||
0b722aec | 1797 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1798 | { |
1799 | NORMAL_FRAME, | |
1800 | record_btrace_frame_unwind_stop_reason, | |
1801 | record_btrace_frame_this_id, | |
1802 | record_btrace_frame_prev_register, | |
1803 | NULL, | |
0b722aec MM |
1804 | record_btrace_frame_sniffer, |
1805 | record_btrace_frame_dealloc_cache | |
1806 | }; | |
1807 | ||
1808 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1809 | { | |
1810 | TAILCALL_FRAME, | |
1811 | record_btrace_frame_unwind_stop_reason, | |
1812 | record_btrace_frame_this_id, | |
1813 | record_btrace_frame_prev_register, | |
1814 | NULL, | |
1815 | record_btrace_tailcall_frame_sniffer, | |
1816 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1817 | }; |
b2f4cfde | 1818 | |
ac01945b TT |
1819 | /* Implement the to_get_unwinder method. */ |
1820 | ||
1821 | static const struct frame_unwind * | |
1822 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1823 | { | |
1824 | return &record_btrace_frame_unwind; | |
1825 | } | |
1826 | ||
1827 | /* Implement the to_get_tailcall_unwinder method. */ | |
1828 | ||
1829 | static const struct frame_unwind * | |
1830 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1831 | { | |
1832 | return &record_btrace_tailcall_frame_unwind; | |
1833 | } | |
1834 | ||
987e68b1 MM |
1835 | /* Return a human-readable string for FLAG. */ |
1836 | ||
1837 | static const char * | |
1838 | btrace_thread_flag_to_str (enum btrace_thread_flag flag) | |
1839 | { | |
1840 | switch (flag) | |
1841 | { | |
1842 | case BTHR_STEP: | |
1843 | return "step"; | |
1844 | ||
1845 | case BTHR_RSTEP: | |
1846 | return "reverse-step"; | |
1847 | ||
1848 | case BTHR_CONT: | |
1849 | return "cont"; | |
1850 | ||
1851 | case BTHR_RCONT: | |
1852 | return "reverse-cont"; | |
1853 | ||
1854 | case BTHR_STOP: | |
1855 | return "stop"; | |
1856 | } | |
1857 | ||
1858 | return "<invalid>"; | |
1859 | } | |
1860 | ||
52834460 MM |
1861 | /* Indicate that TP should be resumed according to FLAG. */ |
1862 | ||
1863 | static void | |
1864 | record_btrace_resume_thread (struct thread_info *tp, | |
1865 | enum btrace_thread_flag flag) | |
1866 | { | |
1867 | struct btrace_thread_info *btinfo; | |
1868 | ||
43792cf0 | 1869 | DEBUG ("resuming thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 | 1870 | target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag)); |
52834460 MM |
1871 | |
1872 | btinfo = &tp->btrace; | |
1873 | ||
52834460 MM |
1874 | /* Fetch the latest branch trace. */ |
1875 | btrace_fetch (tp); | |
1876 | ||
0ca912df MM |
1877 | /* A resume request overwrites a preceding resume or stop request. */ |
1878 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1879 | btinfo->flags |= flag; |
1880 | } | |
1881 | ||
ec71cc2f MM |
1882 | /* Get the current frame for TP. */ |
1883 | ||
1884 | static struct frame_info * | |
1885 | get_thread_current_frame (struct thread_info *tp) | |
1886 | { | |
1887 | struct frame_info *frame; | |
1888 | ptid_t old_inferior_ptid; | |
1889 | int executing; | |
1890 | ||
1891 | /* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */ | |
1892 | old_inferior_ptid = inferior_ptid; | |
1893 | inferior_ptid = tp->ptid; | |
1894 | ||
1895 | /* Clear the executing flag to allow changes to the current frame. | |
1896 | We are not actually running, yet. We just started a reverse execution | |
1897 | command or a record goto command. | |
1898 | For the latter, EXECUTING is false and this has no effect. | |
1899 | For the former, EXECUTING is true and we're in to_wait, about to | |
1900 | move the thread. Since we need to recompute the stack, we temporarily | |
1901 | set EXECUTING to flase. */ | |
1902 | executing = is_executing (inferior_ptid); | |
1903 | set_executing (inferior_ptid, 0); | |
1904 | ||
1905 | frame = NULL; | |
1906 | TRY | |
1907 | { | |
1908 | frame = get_current_frame (); | |
1909 | } | |
1910 | CATCH (except, RETURN_MASK_ALL) | |
1911 | { | |
1912 | /* Restore the previous execution state. */ | |
1913 | set_executing (inferior_ptid, executing); | |
1914 | ||
1915 | /* Restore the previous inferior_ptid. */ | |
1916 | inferior_ptid = old_inferior_ptid; | |
1917 | ||
1918 | throw_exception (except); | |
1919 | } | |
1920 | END_CATCH | |
1921 | ||
1922 | /* Restore the previous execution state. */ | |
1923 | set_executing (inferior_ptid, executing); | |
1924 | ||
1925 | /* Restore the previous inferior_ptid. */ | |
1926 | inferior_ptid = old_inferior_ptid; | |
1927 | ||
1928 | return frame; | |
1929 | } | |
1930 | ||
52834460 MM |
1931 | /* Start replaying a thread. */ |
1932 | ||
1933 | static struct btrace_insn_iterator * | |
1934 | record_btrace_start_replaying (struct thread_info *tp) | |
1935 | { | |
52834460 MM |
1936 | struct btrace_insn_iterator *replay; |
1937 | struct btrace_thread_info *btinfo; | |
52834460 MM |
1938 | |
1939 | btinfo = &tp->btrace; | |
1940 | replay = NULL; | |
1941 | ||
1942 | /* We can't start replaying without trace. */ | |
1943 | if (btinfo->begin == NULL) | |
1944 | return NULL; | |
1945 | ||
52834460 MM |
1946 | /* GDB stores the current frame_id when stepping in order to detects steps |
1947 | into subroutines. | |
1948 | Since frames are computed differently when we're replaying, we need to | |
1949 | recompute those stored frames and fix them up so we can still detect | |
1950 | subroutines after we started replaying. */ | |
492d29ea | 1951 | TRY |
52834460 MM |
1952 | { |
1953 | struct frame_info *frame; | |
1954 | struct frame_id frame_id; | |
1955 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1956 | ||
1957 | /* The current frame without replaying - computed via normal unwind. */ | |
ec71cc2f | 1958 | frame = get_thread_current_frame (tp); |
52834460 MM |
1959 | frame_id = get_frame_id (frame); |
1960 | ||
1961 | /* Check if we need to update any stepping-related frame id's. */ | |
1962 | upd_step_frame_id = frame_id_eq (frame_id, | |
1963 | tp->control.step_frame_id); | |
1964 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1965 | tp->control.step_stack_frame_id); | |
1966 | ||
1967 | /* We start replaying at the end of the branch trace. This corresponds | |
1968 | to the current instruction. */ | |
8d749320 | 1969 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
1970 | btrace_insn_end (replay, btinfo); |
1971 | ||
31fd9caa MM |
1972 | /* Skip gaps at the end of the trace. */ |
1973 | while (btrace_insn_get (replay) == NULL) | |
1974 | { | |
1975 | unsigned int steps; | |
1976 | ||
1977 | steps = btrace_insn_prev (replay, 1); | |
1978 | if (steps == 0) | |
1979 | error (_("No trace.")); | |
1980 | } | |
1981 | ||
52834460 MM |
1982 | /* We're not replaying, yet. */ |
1983 | gdb_assert (btinfo->replay == NULL); | |
1984 | btinfo->replay = replay; | |
1985 | ||
1986 | /* Make sure we're not using any stale registers. */ | |
1987 | registers_changed_ptid (tp->ptid); | |
1988 | ||
1989 | /* The current frame with replaying - computed via btrace unwind. */ | |
ec71cc2f | 1990 | frame = get_thread_current_frame (tp); |
52834460 MM |
1991 | frame_id = get_frame_id (frame); |
1992 | ||
1993 | /* Replace stepping related frames where necessary. */ | |
1994 | if (upd_step_frame_id) | |
1995 | tp->control.step_frame_id = frame_id; | |
1996 | if (upd_step_stack_frame_id) | |
1997 | tp->control.step_stack_frame_id = frame_id; | |
1998 | } | |
492d29ea | 1999 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
2000 | { |
2001 | xfree (btinfo->replay); | |
2002 | btinfo->replay = NULL; | |
2003 | ||
2004 | registers_changed_ptid (tp->ptid); | |
2005 | ||
2006 | throw_exception (except); | |
2007 | } | |
492d29ea | 2008 | END_CATCH |
52834460 MM |
2009 | |
2010 | return replay; | |
2011 | } | |
2012 | ||
2013 | /* Stop replaying a thread. */ | |
2014 | ||
2015 | static void | |
2016 | record_btrace_stop_replaying (struct thread_info *tp) | |
2017 | { | |
2018 | struct btrace_thread_info *btinfo; | |
2019 | ||
2020 | btinfo = &tp->btrace; | |
2021 | ||
2022 | xfree (btinfo->replay); | |
2023 | btinfo->replay = NULL; | |
2024 | ||
2025 | /* Make sure we're not leaving any stale registers. */ | |
2026 | registers_changed_ptid (tp->ptid); | |
2027 | } | |
2028 | ||
e3cfc1c7 MM |
2029 | /* Stop replaying TP if it is at the end of its execution history. */ |
2030 | ||
2031 | static void | |
2032 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
2033 | { | |
2034 | struct btrace_insn_iterator *replay, end; | |
2035 | struct btrace_thread_info *btinfo; | |
2036 | ||
2037 | btinfo = &tp->btrace; | |
2038 | replay = btinfo->replay; | |
2039 | ||
2040 | if (replay == NULL) | |
2041 | return; | |
2042 | ||
2043 | btrace_insn_end (&end, btinfo); | |
2044 | ||
2045 | if (btrace_insn_cmp (replay, &end) == 0) | |
2046 | record_btrace_stop_replaying (tp); | |
2047 | } | |
2048 | ||
b2f4cfde MM |
2049 | /* The to_resume method of target record-btrace. */ |
2050 | ||
2051 | static void | |
2052 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
2053 | enum gdb_signal signal) | |
2054 | { | |
0ca912df | 2055 | struct thread_info *tp; |
d2939ba2 | 2056 | enum btrace_thread_flag flag, cflag; |
52834460 | 2057 | |
987e68b1 MM |
2058 | DEBUG ("resume %s: %s%s", target_pid_to_str (ptid), |
2059 | execution_direction == EXEC_REVERSE ? "reverse-" : "", | |
2060 | step ? "step" : "cont"); | |
52834460 | 2061 | |
0ca912df MM |
2062 | /* Store the execution direction of the last resume. |
2063 | ||
2064 | If there is more than one to_resume call, we have to rely on infrun | |
2065 | to not change the execution direction in-between. */ | |
70ad5bff MM |
2066 | record_btrace_resume_exec_dir = execution_direction; |
2067 | ||
0ca912df | 2068 | /* As long as we're not replaying, just forward the request. |
52834460 | 2069 | |
0ca912df MM |
2070 | For non-stop targets this means that no thread is replaying. In order to |
2071 | make progress, we may need to explicitly move replaying threads to the end | |
2072 | of their execution history. */ | |
a52eab48 MM |
2073 | if ((execution_direction != EXEC_REVERSE) |
2074 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2075 | { |
e75fdfca | 2076 | ops = ops->beneath; |
04c4fe8c MM |
2077 | ops->to_resume (ops, ptid, step, signal); |
2078 | return; | |
b2f4cfde MM |
2079 | } |
2080 | ||
52834460 | 2081 | /* Compute the btrace thread flag for the requested move. */ |
d2939ba2 MM |
2082 | if (execution_direction == EXEC_REVERSE) |
2083 | { | |
2084 | flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP; | |
2085 | cflag = BTHR_RCONT; | |
2086 | } | |
52834460 | 2087 | else |
d2939ba2 MM |
2088 | { |
2089 | flag = step == 0 ? BTHR_CONT : BTHR_STEP; | |
2090 | cflag = BTHR_CONT; | |
2091 | } | |
52834460 | 2092 | |
52834460 | 2093 | /* We just indicate the resume intent here. The actual stepping happens in |
d2939ba2 MM |
2094 | record_btrace_wait below. |
2095 | ||
2096 | For all-stop targets, we only step INFERIOR_PTID and continue others. */ | |
2097 | if (!target_is_non_stop_p ()) | |
2098 | { | |
2099 | gdb_assert (ptid_match (inferior_ptid, ptid)); | |
2100 | ||
2101 | ALL_NON_EXITED_THREADS (tp) | |
2102 | if (ptid_match (tp->ptid, ptid)) | |
2103 | { | |
2104 | if (ptid_match (tp->ptid, inferior_ptid)) | |
2105 | record_btrace_resume_thread (tp, flag); | |
2106 | else | |
2107 | record_btrace_resume_thread (tp, cflag); | |
2108 | } | |
2109 | } | |
2110 | else | |
2111 | { | |
2112 | ALL_NON_EXITED_THREADS (tp) | |
2113 | if (ptid_match (tp->ptid, ptid)) | |
2114 | record_btrace_resume_thread (tp, flag); | |
2115 | } | |
70ad5bff MM |
2116 | |
2117 | /* Async support. */ | |
2118 | if (target_can_async_p ()) | |
2119 | { | |
6a3753b3 | 2120 | target_async (1); |
70ad5bff MM |
2121 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
2122 | } | |
52834460 MM |
2123 | } |
2124 | ||
987e68b1 MM |
2125 | /* Cancel resuming TP. */ |
2126 | ||
2127 | static void | |
2128 | record_btrace_cancel_resume (struct thread_info *tp) | |
2129 | { | |
2130 | enum btrace_thread_flag flags; | |
2131 | ||
2132 | flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP); | |
2133 | if (flags == 0) | |
2134 | return; | |
2135 | ||
43792cf0 PA |
2136 | DEBUG ("cancel resume thread %s (%s): %x (%s)", |
2137 | print_thread_id (tp), | |
987e68b1 MM |
2138 | target_pid_to_str (tp->ptid), flags, |
2139 | btrace_thread_flag_to_str (flags)); | |
2140 | ||
2141 | tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP); | |
e3cfc1c7 | 2142 | record_btrace_stop_replaying_at_end (tp); |
52834460 MM |
2143 | } |
2144 | ||
2145 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
2146 | ||
2147 | static struct target_waitstatus | |
2148 | btrace_step_no_history (void) | |
2149 | { | |
2150 | struct target_waitstatus status; | |
2151 | ||
2152 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
2153 | ||
2154 | return status; | |
2155 | } | |
2156 | ||
2157 | /* Return a target_waitstatus indicating that a step finished. */ | |
2158 | ||
2159 | static struct target_waitstatus | |
2160 | btrace_step_stopped (void) | |
2161 | { | |
2162 | struct target_waitstatus status; | |
2163 | ||
2164 | status.kind = TARGET_WAITKIND_STOPPED; | |
2165 | status.value.sig = GDB_SIGNAL_TRAP; | |
2166 | ||
2167 | return status; | |
2168 | } | |
2169 | ||
6e4879f0 MM |
2170 | /* Return a target_waitstatus indicating that a thread was stopped as |
2171 | requested. */ | |
2172 | ||
2173 | static struct target_waitstatus | |
2174 | btrace_step_stopped_on_request (void) | |
2175 | { | |
2176 | struct target_waitstatus status; | |
2177 | ||
2178 | status.kind = TARGET_WAITKIND_STOPPED; | |
2179 | status.value.sig = GDB_SIGNAL_0; | |
2180 | ||
2181 | return status; | |
2182 | } | |
2183 | ||
d825d248 MM |
2184 | /* Return a target_waitstatus indicating a spurious stop. */ |
2185 | ||
2186 | static struct target_waitstatus | |
2187 | btrace_step_spurious (void) | |
2188 | { | |
2189 | struct target_waitstatus status; | |
2190 | ||
2191 | status.kind = TARGET_WAITKIND_SPURIOUS; | |
2192 | ||
2193 | return status; | |
2194 | } | |
2195 | ||
e3cfc1c7 MM |
2196 | /* Return a target_waitstatus indicating that the thread was not resumed. */ |
2197 | ||
2198 | static struct target_waitstatus | |
2199 | btrace_step_no_resumed (void) | |
2200 | { | |
2201 | struct target_waitstatus status; | |
2202 | ||
2203 | status.kind = TARGET_WAITKIND_NO_RESUMED; | |
2204 | ||
2205 | return status; | |
2206 | } | |
2207 | ||
2208 | /* Return a target_waitstatus indicating that we should wait again. */ | |
2209 | ||
2210 | static struct target_waitstatus | |
2211 | btrace_step_again (void) | |
2212 | { | |
2213 | struct target_waitstatus status; | |
2214 | ||
2215 | status.kind = TARGET_WAITKIND_IGNORE; | |
2216 | ||
2217 | return status; | |
2218 | } | |
2219 | ||
52834460 MM |
2220 | /* Clear the record histories. */ |
2221 | ||
2222 | static void | |
2223 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
2224 | { | |
2225 | xfree (btinfo->insn_history); | |
2226 | xfree (btinfo->call_history); | |
2227 | ||
2228 | btinfo->insn_history = NULL; | |
2229 | btinfo->call_history = NULL; | |
2230 | } | |
2231 | ||
3c615f99 MM |
2232 | /* Check whether TP's current replay position is at a breakpoint. */ |
2233 | ||
2234 | static int | |
2235 | record_btrace_replay_at_breakpoint (struct thread_info *tp) | |
2236 | { | |
2237 | struct btrace_insn_iterator *replay; | |
2238 | struct btrace_thread_info *btinfo; | |
2239 | const struct btrace_insn *insn; | |
2240 | struct inferior *inf; | |
2241 | ||
2242 | btinfo = &tp->btrace; | |
2243 | replay = btinfo->replay; | |
2244 | ||
2245 | if (replay == NULL) | |
2246 | return 0; | |
2247 | ||
2248 | insn = btrace_insn_get (replay); | |
2249 | if (insn == NULL) | |
2250 | return 0; | |
2251 | ||
2252 | inf = find_inferior_ptid (tp->ptid); | |
2253 | if (inf == NULL) | |
2254 | return 0; | |
2255 | ||
2256 | return record_check_stopped_by_breakpoint (inf->aspace, insn->pc, | |
2257 | &btinfo->stop_reason); | |
2258 | } | |
2259 | ||
d825d248 | 2260 | /* Step one instruction in forward direction. */ |
52834460 MM |
2261 | |
2262 | static struct target_waitstatus | |
d825d248 | 2263 | record_btrace_single_step_forward (struct thread_info *tp) |
52834460 MM |
2264 | { |
2265 | struct btrace_insn_iterator *replay, end; | |
2266 | struct btrace_thread_info *btinfo; | |
52834460 | 2267 | |
d825d248 MM |
2268 | btinfo = &tp->btrace; |
2269 | replay = btinfo->replay; | |
2270 | ||
2271 | /* We're done if we're not replaying. */ | |
2272 | if (replay == NULL) | |
2273 | return btrace_step_no_history (); | |
2274 | ||
011c71b6 MM |
2275 | /* Check if we're stepping a breakpoint. */ |
2276 | if (record_btrace_replay_at_breakpoint (tp)) | |
2277 | return btrace_step_stopped (); | |
2278 | ||
d825d248 MM |
2279 | /* Skip gaps during replay. */ |
2280 | do | |
2281 | { | |
2282 | unsigned int steps; | |
2283 | ||
e3cfc1c7 MM |
2284 | /* We will bail out here if we continue stepping after reaching the end |
2285 | of the execution history. */ | |
d825d248 MM |
2286 | steps = btrace_insn_next (replay, 1); |
2287 | if (steps == 0) | |
e3cfc1c7 | 2288 | return btrace_step_no_history (); |
d825d248 MM |
2289 | } |
2290 | while (btrace_insn_get (replay) == NULL); | |
2291 | ||
2292 | /* Determine the end of the instruction trace. */ | |
2293 | btrace_insn_end (&end, btinfo); | |
2294 | ||
e3cfc1c7 MM |
2295 | /* The execution trace contains (and ends with) the current instruction. |
2296 | This instruction has not been executed, yet, so the trace really ends | |
2297 | one instruction earlier. */ | |
d825d248 | 2298 | if (btrace_insn_cmp (replay, &end) == 0) |
e3cfc1c7 | 2299 | return btrace_step_no_history (); |
d825d248 MM |
2300 | |
2301 | return btrace_step_spurious (); | |
2302 | } | |
2303 | ||
2304 | /* Step one instruction in backward direction. */ | |
2305 | ||
2306 | static struct target_waitstatus | |
2307 | record_btrace_single_step_backward (struct thread_info *tp) | |
2308 | { | |
2309 | struct btrace_insn_iterator *replay; | |
2310 | struct btrace_thread_info *btinfo; | |
e59fa00f | 2311 | |
52834460 MM |
2312 | btinfo = &tp->btrace; |
2313 | replay = btinfo->replay; | |
2314 | ||
d825d248 MM |
2315 | /* Start replaying if we're not already doing so. */ |
2316 | if (replay == NULL) | |
2317 | replay = record_btrace_start_replaying (tp); | |
2318 | ||
2319 | /* If we can't step any further, we reached the end of the history. | |
2320 | Skip gaps during replay. */ | |
2321 | do | |
2322 | { | |
2323 | unsigned int steps; | |
2324 | ||
2325 | steps = btrace_insn_prev (replay, 1); | |
2326 | if (steps == 0) | |
2327 | return btrace_step_no_history (); | |
2328 | } | |
2329 | while (btrace_insn_get (replay) == NULL); | |
2330 | ||
011c71b6 MM |
2331 | /* Check if we're stepping a breakpoint. |
2332 | ||
2333 | For reverse-stepping, this check is after the step. There is logic in | |
2334 | infrun.c that handles reverse-stepping separately. See, for example, | |
2335 | proceed and adjust_pc_after_break. | |
2336 | ||
2337 | This code assumes that for reverse-stepping, PC points to the last | |
2338 | de-executed instruction, whereas for forward-stepping PC points to the | |
2339 | next to-be-executed instruction. */ | |
2340 | if (record_btrace_replay_at_breakpoint (tp)) | |
2341 | return btrace_step_stopped (); | |
2342 | ||
d825d248 MM |
2343 | return btrace_step_spurious (); |
2344 | } | |
2345 | ||
2346 | /* Step a single thread. */ | |
2347 | ||
2348 | static struct target_waitstatus | |
2349 | record_btrace_step_thread (struct thread_info *tp) | |
2350 | { | |
2351 | struct btrace_thread_info *btinfo; | |
2352 | struct target_waitstatus status; | |
2353 | enum btrace_thread_flag flags; | |
2354 | ||
2355 | btinfo = &tp->btrace; | |
2356 | ||
6e4879f0 MM |
2357 | flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP); |
2358 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 | 2359 | |
43792cf0 | 2360 | DEBUG ("stepping thread %s (%s): %x (%s)", print_thread_id (tp), |
987e68b1 MM |
2361 | target_pid_to_str (tp->ptid), flags, |
2362 | btrace_thread_flag_to_str (flags)); | |
52834460 | 2363 | |
6e4879f0 MM |
2364 | /* We can't step without an execution history. */ |
2365 | if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp)) | |
2366 | return btrace_step_no_history (); | |
2367 | ||
52834460 MM |
2368 | switch (flags) |
2369 | { | |
2370 | default: | |
2371 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
2372 | ||
6e4879f0 MM |
2373 | case BTHR_STOP: |
2374 | return btrace_step_stopped_on_request (); | |
2375 | ||
52834460 | 2376 | case BTHR_STEP: |
d825d248 MM |
2377 | status = record_btrace_single_step_forward (tp); |
2378 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2379 | break; |
52834460 MM |
2380 | |
2381 | return btrace_step_stopped (); | |
2382 | ||
2383 | case BTHR_RSTEP: | |
d825d248 MM |
2384 | status = record_btrace_single_step_backward (tp); |
2385 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2386 | break; |
52834460 MM |
2387 | |
2388 | return btrace_step_stopped (); | |
2389 | ||
2390 | case BTHR_CONT: | |
e3cfc1c7 MM |
2391 | status = record_btrace_single_step_forward (tp); |
2392 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2393 | break; | |
52834460 | 2394 | |
e3cfc1c7 MM |
2395 | btinfo->flags |= flags; |
2396 | return btrace_step_again (); | |
52834460 MM |
2397 | |
2398 | case BTHR_RCONT: | |
e3cfc1c7 MM |
2399 | status = record_btrace_single_step_backward (tp); |
2400 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2401 | break; | |
52834460 | 2402 | |
e3cfc1c7 MM |
2403 | btinfo->flags |= flags; |
2404 | return btrace_step_again (); | |
2405 | } | |
d825d248 | 2406 | |
e3cfc1c7 MM |
2407 | /* We keep threads moving at the end of their execution history. The to_wait |
2408 | method will stop the thread for whom the event is reported. */ | |
2409 | if (status.kind == TARGET_WAITKIND_NO_HISTORY) | |
2410 | btinfo->flags |= flags; | |
52834460 | 2411 | |
e3cfc1c7 | 2412 | return status; |
b2f4cfde MM |
2413 | } |
2414 | ||
e3cfc1c7 MM |
2415 | /* A vector of threads. */ |
2416 | ||
2417 | typedef struct thread_info * tp_t; | |
2418 | DEF_VEC_P (tp_t); | |
2419 | ||
a6b5be76 MM |
2420 | /* Announce further events if necessary. */ |
2421 | ||
2422 | static void | |
2423 | record_btrace_maybe_mark_async_event (const VEC (tp_t) *moving, | |
2424 | const VEC (tp_t) *no_history) | |
2425 | { | |
2426 | int more_moving, more_no_history; | |
2427 | ||
2428 | more_moving = !VEC_empty (tp_t, moving); | |
2429 | more_no_history = !VEC_empty (tp_t, no_history); | |
2430 | ||
2431 | if (!more_moving && !more_no_history) | |
2432 | return; | |
2433 | ||
2434 | if (more_moving) | |
2435 | DEBUG ("movers pending"); | |
2436 | ||
2437 | if (more_no_history) | |
2438 | DEBUG ("no-history pending"); | |
2439 | ||
2440 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
2441 | } | |
2442 | ||
b2f4cfde MM |
2443 | /* The to_wait method of target record-btrace. */ |
2444 | ||
2445 | static ptid_t | |
2446 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2447 | struct target_waitstatus *status, int options) | |
2448 | { | |
e3cfc1c7 MM |
2449 | VEC (tp_t) *moving, *no_history; |
2450 | struct thread_info *tp, *eventing; | |
2451 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
52834460 MM |
2452 | |
2453 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2454 | ||
b2f4cfde | 2455 | /* As long as we're not replaying, just forward the request. */ |
a52eab48 MM |
2456 | if ((execution_direction != EXEC_REVERSE) |
2457 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2458 | { |
e75fdfca TT |
2459 | ops = ops->beneath; |
2460 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2461 | } |
2462 | ||
e3cfc1c7 MM |
2463 | moving = NULL; |
2464 | no_history = NULL; | |
2465 | ||
2466 | make_cleanup (VEC_cleanup (tp_t), &moving); | |
2467 | make_cleanup (VEC_cleanup (tp_t), &no_history); | |
2468 | ||
2469 | /* Keep a work list of moving threads. */ | |
2470 | ALL_NON_EXITED_THREADS (tp) | |
2471 | if (ptid_match (tp->ptid, ptid) | |
2472 | && ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)) | |
2473 | VEC_safe_push (tp_t, moving, tp); | |
2474 | ||
2475 | if (VEC_empty (tp_t, moving)) | |
52834460 | 2476 | { |
e3cfc1c7 | 2477 | *status = btrace_step_no_resumed (); |
52834460 | 2478 | |
e3cfc1c7 MM |
2479 | DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid), |
2480 | target_waitstatus_to_string (status)); | |
2481 | ||
2482 | do_cleanups (cleanups); | |
2483 | return null_ptid; | |
52834460 MM |
2484 | } |
2485 | ||
e3cfc1c7 MM |
2486 | /* Step moving threads one by one, one step each, until either one thread |
2487 | reports an event or we run out of threads to step. | |
2488 | ||
2489 | When stepping more than one thread, chances are that some threads reach | |
2490 | the end of their execution history earlier than others. If we reported | |
2491 | this immediately, all-stop on top of non-stop would stop all threads and | |
2492 | resume the same threads next time. And we would report the same thread | |
2493 | having reached the end of its execution history again. | |
2494 | ||
2495 | In the worst case, this would starve the other threads. But even if other | |
2496 | threads would be allowed to make progress, this would result in far too | |
2497 | many intermediate stops. | |
2498 | ||
2499 | We therefore delay the reporting of "no execution history" until we have | |
2500 | nothing else to report. By this time, all threads should have moved to | |
2501 | either the beginning or the end of their execution history. There will | |
2502 | be a single user-visible stop. */ | |
2503 | eventing = NULL; | |
2504 | while ((eventing == NULL) && !VEC_empty (tp_t, moving)) | |
2505 | { | |
2506 | unsigned int ix; | |
2507 | ||
2508 | ix = 0; | |
2509 | while ((eventing == NULL) && VEC_iterate (tp_t, moving, ix, tp)) | |
2510 | { | |
2511 | *status = record_btrace_step_thread (tp); | |
2512 | ||
2513 | switch (status->kind) | |
2514 | { | |
2515 | case TARGET_WAITKIND_IGNORE: | |
2516 | ix++; | |
2517 | break; | |
2518 | ||
2519 | case TARGET_WAITKIND_NO_HISTORY: | |
2520 | VEC_safe_push (tp_t, no_history, | |
2521 | VEC_ordered_remove (tp_t, moving, ix)); | |
2522 | break; | |
2523 | ||
2524 | default: | |
2525 | eventing = VEC_unordered_remove (tp_t, moving, ix); | |
2526 | break; | |
2527 | } | |
2528 | } | |
2529 | } | |
2530 | ||
2531 | if (eventing == NULL) | |
2532 | { | |
2533 | /* We started with at least one moving thread. This thread must have | |
2534 | either stopped or reached the end of its execution history. | |
2535 | ||
2536 | In the former case, EVENTING must not be NULL. | |
2537 | In the latter case, NO_HISTORY must not be empty. */ | |
2538 | gdb_assert (!VEC_empty (tp_t, no_history)); | |
2539 | ||
2540 | /* We kept threads moving at the end of their execution history. Stop | |
2541 | EVENTING now that we are going to report its stop. */ | |
2542 | eventing = VEC_unordered_remove (tp_t, no_history, 0); | |
2543 | eventing->btrace.flags &= ~BTHR_MOVE; | |
2544 | ||
2545 | *status = btrace_step_no_history (); | |
2546 | } | |
2547 | ||
2548 | gdb_assert (eventing != NULL); | |
2549 | ||
2550 | /* We kept threads replaying at the end of their execution history. Stop | |
2551 | replaying EVENTING now that we are going to report its stop. */ | |
2552 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2553 | |
2554 | /* Stop all other threads. */ | |
5953356c | 2555 | if (!target_is_non_stop_p ()) |
e3cfc1c7 MM |
2556 | ALL_NON_EXITED_THREADS (tp) |
2557 | record_btrace_cancel_resume (tp); | |
52834460 | 2558 | |
a6b5be76 MM |
2559 | /* In async mode, we need to announce further events. */ |
2560 | if (target_is_async_p ()) | |
2561 | record_btrace_maybe_mark_async_event (moving, no_history); | |
2562 | ||
52834460 | 2563 | /* Start record histories anew from the current position. */ |
e3cfc1c7 | 2564 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2565 | |
2566 | /* We moved the replay position but did not update registers. */ | |
e3cfc1c7 MM |
2567 | registers_changed_ptid (eventing->ptid); |
2568 | ||
43792cf0 PA |
2569 | DEBUG ("wait ended by thread %s (%s): %s", |
2570 | print_thread_id (eventing), | |
e3cfc1c7 MM |
2571 | target_pid_to_str (eventing->ptid), |
2572 | target_waitstatus_to_string (status)); | |
52834460 | 2573 | |
e3cfc1c7 MM |
2574 | do_cleanups (cleanups); |
2575 | return eventing->ptid; | |
52834460 MM |
2576 | } |
2577 | ||
6e4879f0 MM |
2578 | /* The to_stop method of target record-btrace. */ |
2579 | ||
2580 | static void | |
2581 | record_btrace_stop (struct target_ops *ops, ptid_t ptid) | |
2582 | { | |
2583 | DEBUG ("stop %s", target_pid_to_str (ptid)); | |
2584 | ||
2585 | /* As long as we're not replaying, just forward the request. */ | |
a52eab48 MM |
2586 | if ((execution_direction != EXEC_REVERSE) |
2587 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
6e4879f0 MM |
2588 | { |
2589 | ops = ops->beneath; | |
2590 | ops->to_stop (ops, ptid); | |
2591 | } | |
2592 | else | |
2593 | { | |
2594 | struct thread_info *tp; | |
2595 | ||
2596 | ALL_NON_EXITED_THREADS (tp) | |
2597 | if (ptid_match (tp->ptid, ptid)) | |
2598 | { | |
2599 | tp->btrace.flags &= ~BTHR_MOVE; | |
2600 | tp->btrace.flags |= BTHR_STOP; | |
2601 | } | |
2602 | } | |
2603 | } | |
2604 | ||
52834460 MM |
2605 | /* The to_can_execute_reverse method of target record-btrace. */ |
2606 | ||
2607 | static int | |
19db3e69 | 2608 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2609 | { |
2610 | return 1; | |
2611 | } | |
2612 | ||
9e8915c6 | 2613 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2614 | |
9e8915c6 PA |
2615 | static int |
2616 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2617 | { |
a52eab48 | 2618 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2619 | { |
2620 | struct thread_info *tp = inferior_thread (); | |
2621 | ||
2622 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2623 | } | |
2624 | ||
2625 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2626 | } | |
2627 | ||
2628 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2629 | record-btrace. */ | |
2630 | ||
2631 | static int | |
2632 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2633 | { | |
a52eab48 | 2634 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2635 | return 1; |
2636 | ||
2637 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2638 | } | |
2639 | ||
2640 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2641 | ||
2642 | static int | |
2643 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2644 | { | |
a52eab48 | 2645 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2646 | { |
2647 | struct thread_info *tp = inferior_thread (); | |
2648 | ||
2649 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2650 | } | |
2651 | ||
2652 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2653 | } | |
2654 | ||
2655 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2656 | record-btrace. */ | |
2657 | ||
2658 | static int | |
2659 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2660 | { | |
a52eab48 | 2661 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 | 2662 | return 1; |
52834460 | 2663 | |
9e8915c6 | 2664 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2665 | } |
2666 | ||
e8032dde | 2667 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2668 | |
2669 | static void | |
e8032dde | 2670 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2671 | { |
e8032dde | 2672 | /* We don't add or remove threads during replay. */ |
a52eab48 | 2673 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2674 | return; |
2675 | ||
2676 | /* Forward the request. */ | |
e75fdfca | 2677 | ops = ops->beneath; |
e8032dde | 2678 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2679 | } |
2680 | ||
2681 | /* The to_thread_alive method of target record-btrace. */ | |
2682 | ||
2683 | static int | |
2684 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2685 | { | |
2686 | /* We don't add or remove threads during replay. */ | |
a52eab48 | 2687 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2688 | return find_thread_ptid (ptid) != NULL; |
2689 | ||
2690 | /* Forward the request. */ | |
e75fdfca TT |
2691 | ops = ops->beneath; |
2692 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2693 | } |
2694 | ||
066ce621 MM |
2695 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2696 | is stopped. */ | |
2697 | ||
2698 | static void | |
2699 | record_btrace_set_replay (struct thread_info *tp, | |
2700 | const struct btrace_insn_iterator *it) | |
2701 | { | |
2702 | struct btrace_thread_info *btinfo; | |
2703 | ||
2704 | btinfo = &tp->btrace; | |
2705 | ||
2706 | if (it == NULL || it->function == NULL) | |
52834460 | 2707 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2708 | else |
2709 | { | |
2710 | if (btinfo->replay == NULL) | |
52834460 | 2711 | record_btrace_start_replaying (tp); |
066ce621 MM |
2712 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2713 | return; | |
2714 | ||
2715 | *btinfo->replay = *it; | |
52834460 | 2716 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2717 | } |
2718 | ||
52834460 MM |
2719 | /* Start anew from the new replay position. */ |
2720 | record_btrace_clear_histories (btinfo); | |
485668e5 MM |
2721 | |
2722 | stop_pc = regcache_read_pc (get_current_regcache ()); | |
2723 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
066ce621 MM |
2724 | } |
2725 | ||
2726 | /* The to_goto_record_begin method of target record-btrace. */ | |
2727 | ||
2728 | static void | |
08475817 | 2729 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2730 | { |
2731 | struct thread_info *tp; | |
2732 | struct btrace_insn_iterator begin; | |
2733 | ||
2734 | tp = require_btrace_thread (); | |
2735 | ||
2736 | btrace_insn_begin (&begin, &tp->btrace); | |
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); | |
2771 | if (found == 0) | |
2772 | error (_("No such instruction.")); | |
2773 | ||
2774 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2775 | } |
2776 | ||
797094dd MM |
2777 | /* The to_record_stop_replaying method of target record-btrace. */ |
2778 | ||
2779 | static void | |
2780 | record_btrace_stop_replaying_all (struct target_ops *self) | |
2781 | { | |
2782 | struct thread_info *tp; | |
2783 | ||
2784 | ALL_NON_EXITED_THREADS (tp) | |
2785 | record_btrace_stop_replaying (tp); | |
2786 | } | |
2787 | ||
70ad5bff MM |
2788 | /* The to_execution_direction target method. */ |
2789 | ||
2790 | static enum exec_direction_kind | |
2791 | record_btrace_execution_direction (struct target_ops *self) | |
2792 | { | |
2793 | return record_btrace_resume_exec_dir; | |
2794 | } | |
2795 | ||
aef92902 MM |
2796 | /* The to_prepare_to_generate_core target method. */ |
2797 | ||
2798 | static void | |
2799 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2800 | { | |
2801 | record_btrace_generating_corefile = 1; | |
2802 | } | |
2803 | ||
2804 | /* The to_done_generating_core target method. */ | |
2805 | ||
2806 | static void | |
2807 | record_btrace_done_generating_core (struct target_ops *self) | |
2808 | { | |
2809 | record_btrace_generating_corefile = 0; | |
2810 | } | |
2811 | ||
afedecd3 MM |
2812 | /* Initialize the record-btrace target ops. */ |
2813 | ||
2814 | static void | |
2815 | init_record_btrace_ops (void) | |
2816 | { | |
2817 | struct target_ops *ops; | |
2818 | ||
2819 | ops = &record_btrace_ops; | |
2820 | ops->to_shortname = "record-btrace"; | |
2821 | ops->to_longname = "Branch tracing target"; | |
2822 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2823 | ops->to_open = record_btrace_open; | |
2824 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2825 | ops->to_async = record_btrace_async; |
afedecd3 MM |
2826 | ops->to_detach = record_detach; |
2827 | ops->to_disconnect = record_disconnect; | |
2828 | ops->to_mourn_inferior = record_mourn_inferior; | |
2829 | ops->to_kill = record_kill; | |
afedecd3 MM |
2830 | ops->to_stop_recording = record_btrace_stop_recording; |
2831 | ops->to_info_record = record_btrace_info; | |
2832 | ops->to_insn_history = record_btrace_insn_history; | |
2833 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2834 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2835 | ops->to_call_history = record_btrace_call_history; | |
2836 | ops->to_call_history_from = record_btrace_call_history_from; | |
2837 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2838 | ops->to_record_is_replaying = record_btrace_is_replaying; |
7ff27e9b | 2839 | ops->to_record_will_replay = record_btrace_will_replay; |
797094dd | 2840 | ops->to_record_stop_replaying = record_btrace_stop_replaying_all; |
633785ff MM |
2841 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2842 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2843 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2844 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2845 | ops->to_store_registers = record_btrace_store_registers; | |
2846 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2847 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2848 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2849 | ops->to_resume = record_btrace_resume; |
2850 | ops->to_wait = record_btrace_wait; | |
6e4879f0 | 2851 | ops->to_stop = record_btrace_stop; |
e8032dde | 2852 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2853 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2854 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2855 | ops->to_goto_record_end = record_btrace_goto_end; | |
2856 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2857 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2858 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2859 | ops->to_supports_stopped_by_sw_breakpoint | |
2860 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2861 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2862 | ops->to_supports_stopped_by_hw_breakpoint | |
2863 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2864 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2865 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2866 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2867 | ops->to_stratum = record_stratum; |
2868 | ops->to_magic = OPS_MAGIC; | |
2869 | } | |
2870 | ||
f4abbc16 MM |
2871 | /* Start recording in BTS format. */ |
2872 | ||
2873 | static void | |
2874 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2875 | { | |
f4abbc16 MM |
2876 | if (args != NULL && *args != 0) |
2877 | error (_("Invalid argument.")); | |
2878 | ||
2879 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2880 | ||
492d29ea PA |
2881 | TRY |
2882 | { | |
2883 | execute_command ("target record-btrace", from_tty); | |
2884 | } | |
2885 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2886 | { |
2887 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2888 | throw_exception (exception); | |
2889 | } | |
492d29ea | 2890 | END_CATCH |
f4abbc16 MM |
2891 | } |
2892 | ||
bc504a31 | 2893 | /* Start recording in Intel Processor Trace format. */ |
afedecd3 MM |
2894 | |
2895 | static void | |
b20a6524 | 2896 | cmd_record_btrace_pt_start (char *args, int from_tty) |
afedecd3 MM |
2897 | { |
2898 | if (args != NULL && *args != 0) | |
2899 | error (_("Invalid argument.")); | |
2900 | ||
b20a6524 | 2901 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2902 | |
492d29ea PA |
2903 | TRY |
2904 | { | |
2905 | execute_command ("target record-btrace", from_tty); | |
2906 | } | |
2907 | CATCH (exception, RETURN_MASK_ALL) | |
2908 | { | |
2909 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2910 | throw_exception (exception); | |
2911 | } | |
2912 | END_CATCH | |
afedecd3 MM |
2913 | } |
2914 | ||
b20a6524 MM |
2915 | /* Alias for "target record". */ |
2916 | ||
2917 | static void | |
2918 | cmd_record_btrace_start (char *args, int from_tty) | |
2919 | { | |
2920 | if (args != NULL && *args != 0) | |
2921 | error (_("Invalid argument.")); | |
2922 | ||
2923 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2924 | ||
2925 | TRY | |
2926 | { | |
2927 | execute_command ("target record-btrace", from_tty); | |
2928 | } | |
2929 | CATCH (exception, RETURN_MASK_ALL) | |
2930 | { | |
2931 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2932 | ||
2933 | TRY | |
2934 | { | |
2935 | execute_command ("target record-btrace", from_tty); | |
2936 | } | |
2937 | CATCH (exception, RETURN_MASK_ALL) | |
2938 | { | |
2939 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2940 | throw_exception (exception); | |
2941 | } | |
2942 | END_CATCH | |
2943 | } | |
2944 | END_CATCH | |
2945 | } | |
2946 | ||
67b5c0c1 MM |
2947 | /* The "set record btrace" command. */ |
2948 | ||
2949 | static void | |
2950 | cmd_set_record_btrace (char *args, int from_tty) | |
2951 | { | |
2952 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2953 | } | |
2954 | ||
2955 | /* The "show record btrace" command. */ | |
2956 | ||
2957 | static void | |
2958 | cmd_show_record_btrace (char *args, int from_tty) | |
2959 | { | |
2960 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2961 | } | |
2962 | ||
2963 | /* The "show record btrace replay-memory-access" command. */ | |
2964 | ||
2965 | static void | |
2966 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2967 | struct cmd_list_element *c, const char *value) | |
2968 | { | |
2969 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2970 | replay_memory_access); | |
2971 | } | |
2972 | ||
d33501a5 MM |
2973 | /* The "set record btrace bts" command. */ |
2974 | ||
2975 | static void | |
2976 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
2977 | { | |
2978 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
b20a6524 | 2979 | "by an appropriate subcommand.\n")); |
d33501a5 MM |
2980 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", |
2981 | all_commands, gdb_stdout); | |
2982 | } | |
2983 | ||
2984 | /* The "show record btrace bts" command. */ | |
2985 | ||
2986 | static void | |
2987 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
2988 | { | |
2989 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
2990 | } | |
2991 | ||
b20a6524 MM |
2992 | /* The "set record btrace pt" command. */ |
2993 | ||
2994 | static void | |
2995 | cmd_set_record_btrace_pt (char *args, int from_tty) | |
2996 | { | |
2997 | printf_unfiltered (_("\"set record btrace pt\" must be followed " | |
2998 | "by an appropriate subcommand.\n")); | |
2999 | help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ", | |
3000 | all_commands, gdb_stdout); | |
3001 | } | |
3002 | ||
3003 | /* The "show record btrace pt" command. */ | |
3004 | ||
3005 | static void | |
3006 | cmd_show_record_btrace_pt (char *args, int from_tty) | |
3007 | { | |
3008 | cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, ""); | |
3009 | } | |
3010 | ||
3011 | /* The "record bts buffer-size" show value function. */ | |
3012 | ||
3013 | static void | |
3014 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
3015 | struct cmd_list_element *c, | |
3016 | const char *value) | |
3017 | { | |
3018 | fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"), | |
3019 | value); | |
3020 | } | |
3021 | ||
3022 | /* The "record pt buffer-size" show value function. */ | |
3023 | ||
3024 | static void | |
3025 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
3026 | struct cmd_list_element *c, | |
3027 | const char *value) | |
3028 | { | |
3029 | fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"), | |
3030 | value); | |
3031 | } | |
3032 | ||
afedecd3 MM |
3033 | void _initialize_record_btrace (void); |
3034 | ||
3035 | /* Initialize btrace commands. */ | |
3036 | ||
3037 | void | |
3038 | _initialize_record_btrace (void) | |
3039 | { | |
f4abbc16 MM |
3040 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
3041 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
3042 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
3043 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
3044 | ||
f4abbc16 MM |
3045 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
3046 | _("\ | |
3047 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
3048 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
3049 | This format may not be available on all processors."), | |
3050 | &record_btrace_cmdlist); | |
3051 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
3052 | ||
b20a6524 MM |
3053 | add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, |
3054 | _("\ | |
bc504a31 | 3055 | Start branch trace recording in Intel Processor Trace format.\n\n\ |
b20a6524 MM |
3056 | This format may not be available on all processors."), |
3057 | &record_btrace_cmdlist); | |
3058 | add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist); | |
3059 | ||
67b5c0c1 MM |
3060 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
3061 | _("Set record options"), &set_record_btrace_cmdlist, | |
3062 | "set record btrace ", 0, &set_record_cmdlist); | |
3063 | ||
3064 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
3065 | _("Show record options"), &show_record_btrace_cmdlist, | |
3066 | "show record btrace ", 0, &show_record_cmdlist); | |
3067 | ||
3068 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
3069 | replay_memory_access_types, &replay_memory_access, _("\ | |
3070 | Set what memory accesses are allowed during replay."), _("\ | |
3071 | Show what memory accesses are allowed during replay."), | |
3072 | _("Default is READ-ONLY.\n\n\ | |
3073 | The btrace record target does not trace data.\n\ | |
3074 | The memory therefore corresponds to the live target and not \ | |
3075 | to the current replay position.\n\n\ | |
3076 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
3077 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
3078 | replay."), | |
3079 | NULL, cmd_show_replay_memory_access, | |
3080 | &set_record_btrace_cmdlist, | |
3081 | &show_record_btrace_cmdlist); | |
3082 | ||
d33501a5 MM |
3083 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
3084 | _("Set record btrace bts options"), | |
3085 | &set_record_btrace_bts_cmdlist, | |
3086 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
3087 | ||
3088 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
3089 | _("Show record btrace bts options"), | |
3090 | &show_record_btrace_bts_cmdlist, | |
3091 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
3092 | ||
3093 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3094 | &record_btrace_conf.bts.size, | |
3095 | _("Set the record/replay bts buffer size."), | |
3096 | _("Show the record/replay bts buffer size."), _("\ | |
3097 | When starting recording request a trace buffer of this size. \ | |
3098 | The actual buffer size may differ from the requested size. \ | |
3099 | Use \"info record\" to see the actual buffer size.\n\n\ | |
3100 | Bigger buffers allow longer recording but also take more time to process \ | |
3101 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
3102 | The trace buffer size may not be changed while recording."), NULL, |
3103 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
3104 | &set_record_btrace_bts_cmdlist, |
3105 | &show_record_btrace_bts_cmdlist); | |
3106 | ||
b20a6524 MM |
3107 | add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt, |
3108 | _("Set record btrace pt options"), | |
3109 | &set_record_btrace_pt_cmdlist, | |
3110 | "set record btrace pt ", 0, &set_record_btrace_cmdlist); | |
3111 | ||
3112 | add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt, | |
3113 | _("Show record btrace pt options"), | |
3114 | &show_record_btrace_pt_cmdlist, | |
3115 | "show record btrace pt ", 0, &show_record_btrace_cmdlist); | |
3116 | ||
3117 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3118 | &record_btrace_conf.pt.size, | |
3119 | _("Set the record/replay pt buffer size."), | |
3120 | _("Show the record/replay pt buffer size."), _("\ | |
3121 | Bigger buffers allow longer recording but also take more time to process \ | |
3122 | the recorded execution.\n\ | |
3123 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
3124 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
3125 | &set_record_btrace_pt_cmdlist, | |
3126 | &show_record_btrace_pt_cmdlist); | |
3127 | ||
afedecd3 MM |
3128 | init_record_btrace_ops (); |
3129 | add_target (&record_btrace_ops); | |
0b722aec MM |
3130 | |
3131 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
3132 | xcalloc, xfree); | |
d33501a5 MM |
3133 | |
3134 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 3135 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 3136 | } |