Commit | Line | Data |
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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
32d0add0 | 3 | Copyright (C) 2013-2015 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; | |
209 | ||
210 | DEBUG ("open"); | |
211 | ||
8213266a | 212 | record_preopen (); |
afedecd3 MM |
213 | |
214 | if (!target_has_execution) | |
215 | error (_("The program is not being run.")); | |
216 | ||
afedecd3 MM |
217 | gdb_assert (record_btrace_thread_observer == NULL); |
218 | ||
219 | disable_chain = make_cleanup (null_cleanup, NULL); | |
034f788c | 220 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
221 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->num)) |
222 | { | |
f4abbc16 | 223 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 MM |
224 | |
225 | make_cleanup (record_btrace_disable_callback, tp); | |
226 | } | |
227 | ||
228 | record_btrace_auto_enable (); | |
229 | ||
230 | push_target (&record_btrace_ops); | |
231 | ||
70ad5bff MM |
232 | record_btrace_async_inferior_event_handler |
233 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
234 | NULL); | |
aef92902 | 235 | record_btrace_generating_corefile = 0; |
70ad5bff | 236 | |
afedecd3 MM |
237 | observer_notify_record_changed (current_inferior (), 1); |
238 | ||
239 | discard_cleanups (disable_chain); | |
240 | } | |
241 | ||
242 | /* The to_stop_recording method of target record-btrace. */ | |
243 | ||
244 | static void | |
c6cd7c02 | 245 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
246 | { |
247 | struct thread_info *tp; | |
248 | ||
249 | DEBUG ("stop recording"); | |
250 | ||
251 | record_btrace_auto_disable (); | |
252 | ||
034f788c | 253 | ALL_NON_EXITED_THREADS (tp) |
afedecd3 MM |
254 | if (tp->btrace.target != NULL) |
255 | btrace_disable (tp); | |
256 | } | |
257 | ||
258 | /* The to_close method of target record-btrace. */ | |
259 | ||
260 | static void | |
de90e03d | 261 | record_btrace_close (struct target_ops *self) |
afedecd3 | 262 | { |
568e808b MM |
263 | struct thread_info *tp; |
264 | ||
70ad5bff MM |
265 | if (record_btrace_async_inferior_event_handler != NULL) |
266 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
267 | ||
99c819ee MM |
268 | /* Make sure automatic recording gets disabled even if we did not stop |
269 | recording before closing the record-btrace target. */ | |
270 | record_btrace_auto_disable (); | |
271 | ||
568e808b MM |
272 | /* We should have already stopped recording. |
273 | Tear down btrace in case we have not. */ | |
034f788c | 274 | ALL_NON_EXITED_THREADS (tp) |
568e808b | 275 | btrace_teardown (tp); |
afedecd3 MM |
276 | } |
277 | ||
b7d2e916 PA |
278 | /* The to_async method of target record-btrace. */ |
279 | ||
280 | static void | |
6a3753b3 | 281 | record_btrace_async (struct target_ops *ops, int enable) |
b7d2e916 | 282 | { |
6a3753b3 | 283 | if (enable) |
b7d2e916 PA |
284 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
285 | else | |
286 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
287 | ||
6a3753b3 | 288 | ops->beneath->to_async (ops->beneath, enable); |
b7d2e916 PA |
289 | } |
290 | ||
d33501a5 MM |
291 | /* Adjusts the size and returns a human readable size suffix. */ |
292 | ||
293 | static const char * | |
294 | record_btrace_adjust_size (unsigned int *size) | |
295 | { | |
296 | unsigned int sz; | |
297 | ||
298 | sz = *size; | |
299 | ||
300 | if ((sz & ((1u << 30) - 1)) == 0) | |
301 | { | |
302 | *size = sz >> 30; | |
303 | return "GB"; | |
304 | } | |
305 | else if ((sz & ((1u << 20) - 1)) == 0) | |
306 | { | |
307 | *size = sz >> 20; | |
308 | return "MB"; | |
309 | } | |
310 | else if ((sz & ((1u << 10) - 1)) == 0) | |
311 | { | |
312 | *size = sz >> 10; | |
313 | return "kB"; | |
314 | } | |
315 | else | |
316 | return ""; | |
317 | } | |
318 | ||
319 | /* Print a BTS configuration. */ | |
320 | ||
321 | static void | |
322 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
323 | { | |
324 | const char *suffix; | |
325 | unsigned int size; | |
326 | ||
327 | size = conf->size; | |
328 | if (size > 0) | |
329 | { | |
330 | suffix = record_btrace_adjust_size (&size); | |
331 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
332 | } | |
333 | } | |
334 | ||
b20a6524 MM |
335 | /* Print an Intel(R) Processor Trace configuration. */ |
336 | ||
337 | static void | |
338 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
339 | { | |
340 | const char *suffix; | |
341 | unsigned int size; | |
342 | ||
343 | size = conf->size; | |
344 | if (size > 0) | |
345 | { | |
346 | suffix = record_btrace_adjust_size (&size); | |
347 | printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix); | |
348 | } | |
349 | } | |
350 | ||
d33501a5 MM |
351 | /* Print a branch tracing configuration. */ |
352 | ||
353 | static void | |
354 | record_btrace_print_conf (const struct btrace_config *conf) | |
355 | { | |
356 | printf_unfiltered (_("Recording format: %s.\n"), | |
357 | btrace_format_string (conf->format)); | |
358 | ||
359 | switch (conf->format) | |
360 | { | |
361 | case BTRACE_FORMAT_NONE: | |
362 | return; | |
363 | ||
364 | case BTRACE_FORMAT_BTS: | |
365 | record_btrace_print_bts_conf (&conf->bts); | |
366 | return; | |
b20a6524 MM |
367 | |
368 | case BTRACE_FORMAT_PT: | |
369 | record_btrace_print_pt_conf (&conf->pt); | |
370 | return; | |
d33501a5 MM |
371 | } |
372 | ||
373 | internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); | |
374 | } | |
375 | ||
afedecd3 MM |
376 | /* The to_info_record method of target record-btrace. */ |
377 | ||
378 | static void | |
630d6a4a | 379 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
380 | { |
381 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 382 | const struct btrace_config *conf; |
afedecd3 | 383 | struct thread_info *tp; |
31fd9caa | 384 | unsigned int insns, calls, gaps; |
afedecd3 MM |
385 | |
386 | DEBUG ("info"); | |
387 | ||
388 | tp = find_thread_ptid (inferior_ptid); | |
389 | if (tp == NULL) | |
390 | error (_("No thread.")); | |
391 | ||
f4abbc16 MM |
392 | btinfo = &tp->btrace; |
393 | ||
394 | conf = btrace_conf (btinfo); | |
395 | if (conf != NULL) | |
d33501a5 | 396 | record_btrace_print_conf (conf); |
f4abbc16 | 397 | |
afedecd3 MM |
398 | btrace_fetch (tp); |
399 | ||
23a7fe75 MM |
400 | insns = 0; |
401 | calls = 0; | |
31fd9caa | 402 | gaps = 0; |
23a7fe75 | 403 | |
6e07b1d2 | 404 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
405 | { |
406 | struct btrace_call_iterator call; | |
407 | struct btrace_insn_iterator insn; | |
408 | ||
409 | btrace_call_end (&call, btinfo); | |
410 | btrace_call_prev (&call, 1); | |
5de9129b | 411 | calls = btrace_call_number (&call); |
23a7fe75 MM |
412 | |
413 | btrace_insn_end (&insn, btinfo); | |
31fd9caa | 414 | |
5de9129b | 415 | insns = btrace_insn_number (&insn); |
31fd9caa MM |
416 | if (insns != 0) |
417 | { | |
418 | /* The last instruction does not really belong to the trace. */ | |
419 | insns -= 1; | |
420 | } | |
421 | else | |
422 | { | |
423 | unsigned int steps; | |
424 | ||
425 | /* Skip gaps at the end. */ | |
426 | do | |
427 | { | |
428 | steps = btrace_insn_prev (&insn, 1); | |
429 | if (steps == 0) | |
430 | break; | |
431 | ||
432 | insns = btrace_insn_number (&insn); | |
433 | } | |
434 | while (insns == 0); | |
435 | } | |
436 | ||
437 | gaps = btinfo->ngaps; | |
23a7fe75 | 438 | } |
afedecd3 | 439 | |
31fd9caa MM |
440 | printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) " |
441 | "for thread %d (%s).\n"), insns, calls, gaps, | |
442 | tp->num, target_pid_to_str (tp->ptid)); | |
07bbe694 MM |
443 | |
444 | if (btrace_is_replaying (tp)) | |
445 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
446 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
447 | } |
448 | ||
31fd9caa MM |
449 | /* Print a decode error. */ |
450 | ||
451 | static void | |
452 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
453 | enum btrace_format format) | |
454 | { | |
455 | const char *errstr; | |
456 | int is_error; | |
457 | ||
458 | errstr = _("unknown"); | |
459 | is_error = 1; | |
460 | ||
461 | switch (format) | |
462 | { | |
463 | default: | |
464 | break; | |
465 | ||
466 | case BTRACE_FORMAT_BTS: | |
467 | switch (errcode) | |
468 | { | |
469 | default: | |
470 | break; | |
471 | ||
472 | case BDE_BTS_OVERFLOW: | |
473 | errstr = _("instruction overflow"); | |
474 | break; | |
475 | ||
476 | case BDE_BTS_INSN_SIZE: | |
477 | errstr = _("unknown instruction"); | |
478 | break; | |
479 | } | |
480 | break; | |
b20a6524 MM |
481 | |
482 | #if defined (HAVE_LIBIPT) | |
483 | case BTRACE_FORMAT_PT: | |
484 | switch (errcode) | |
485 | { | |
486 | case BDE_PT_USER_QUIT: | |
487 | is_error = 0; | |
488 | errstr = _("trace decode cancelled"); | |
489 | break; | |
490 | ||
491 | case BDE_PT_DISABLED: | |
492 | is_error = 0; | |
493 | errstr = _("disabled"); | |
494 | break; | |
495 | ||
496 | case BDE_PT_OVERFLOW: | |
497 | is_error = 0; | |
498 | errstr = _("overflow"); | |
499 | break; | |
500 | ||
501 | default: | |
502 | if (errcode < 0) | |
503 | errstr = pt_errstr (pt_errcode (errcode)); | |
504 | break; | |
505 | } | |
506 | break; | |
507 | #endif /* defined (HAVE_LIBIPT) */ | |
31fd9caa MM |
508 | } |
509 | ||
510 | ui_out_text (uiout, _("[")); | |
511 | if (is_error) | |
512 | { | |
513 | ui_out_text (uiout, _("decode error (")); | |
514 | ui_out_field_int (uiout, "errcode", errcode); | |
515 | ui_out_text (uiout, _("): ")); | |
516 | } | |
517 | ui_out_text (uiout, errstr); | |
518 | ui_out_text (uiout, _("]\n")); | |
519 | } | |
520 | ||
afedecd3 MM |
521 | /* Print an unsigned int. */ |
522 | ||
523 | static void | |
524 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
525 | { | |
526 | ui_out_field_fmt (uiout, fld, "%u", val); | |
527 | } | |
528 | ||
529 | /* Disassemble a section of the recorded instruction trace. */ | |
530 | ||
531 | static void | |
23a7fe75 | 532 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 533 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
534 | const struct btrace_insn_iterator *begin, |
535 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 MM |
536 | { |
537 | struct gdbarch *gdbarch; | |
23a7fe75 | 538 | struct btrace_insn_iterator it; |
afedecd3 | 539 | |
23a7fe75 MM |
540 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
541 | btrace_insn_number (end)); | |
afedecd3 MM |
542 | |
543 | gdbarch = target_gdbarch (); | |
544 | ||
23a7fe75 | 545 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 546 | { |
23a7fe75 MM |
547 | const struct btrace_insn *insn; |
548 | ||
549 | insn = btrace_insn_get (&it); | |
550 | ||
31fd9caa MM |
551 | /* A NULL instruction indicates a gap in the trace. */ |
552 | if (insn == NULL) | |
553 | { | |
554 | const struct btrace_config *conf; | |
555 | ||
556 | conf = btrace_conf (btinfo); | |
afedecd3 | 557 | |
31fd9caa MM |
558 | /* We have trace so we must have a configuration. */ |
559 | gdb_assert (conf != NULL); | |
560 | ||
561 | btrace_ui_out_decode_error (uiout, it.function->errcode, | |
562 | conf->format); | |
563 | } | |
564 | else | |
565 | { | |
da8c46d2 MM |
566 | char prefix[4]; |
567 | ||
568 | /* We may add a speculation prefix later. We use the same space | |
569 | that is used for the pc prefix. */ | |
570 | if ((flags & DISASSEMBLY_OMIT_PC) == 0) | |
571 | strncpy (prefix, pc_prefix (insn->pc), 3); | |
572 | else | |
573 | { | |
574 | prefix[0] = ' '; | |
575 | prefix[1] = ' '; | |
576 | prefix[2] = ' '; | |
577 | } | |
578 | prefix[3] = 0; | |
579 | ||
31fd9caa MM |
580 | /* Print the instruction index. */ |
581 | ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); | |
582 | ui_out_text (uiout, "\t"); | |
583 | ||
da8c46d2 MM |
584 | /* Indicate speculative execution by a leading '?'. */ |
585 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) | |
586 | prefix[0] = '?'; | |
587 | ||
588 | /* Print the prefix; we tell gdb_disassembly below to omit it. */ | |
589 | ui_out_field_fmt (uiout, "prefix", "%s", prefix); | |
590 | ||
31fd9caa MM |
591 | /* Disassembly with '/m' flag may not produce the expected result. |
592 | See PR gdb/11833. */ | |
da8c46d2 MM |
593 | gdb_disassembly (gdbarch, uiout, NULL, flags | DISASSEMBLY_OMIT_PC, |
594 | 1, insn->pc, insn->pc + 1); | |
31fd9caa | 595 | } |
afedecd3 MM |
596 | } |
597 | } | |
598 | ||
599 | /* The to_insn_history method of target record-btrace. */ | |
600 | ||
601 | static void | |
7a6c5609 | 602 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
603 | { |
604 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
605 | struct btrace_insn_history *history; |
606 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
607 | struct cleanup *uiout_cleanup; |
608 | struct ui_out *uiout; | |
23a7fe75 | 609 | unsigned int context, covered; |
afedecd3 MM |
610 | |
611 | uiout = current_uiout; | |
612 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
613 | "insn history"); | |
afedecd3 | 614 | context = abs (size); |
afedecd3 MM |
615 | if (context == 0) |
616 | error (_("Bad record instruction-history-size.")); | |
617 | ||
23a7fe75 MM |
618 | btinfo = require_btrace (); |
619 | history = btinfo->insn_history; | |
620 | if (history == NULL) | |
afedecd3 | 621 | { |
07bbe694 | 622 | struct btrace_insn_iterator *replay; |
afedecd3 | 623 | |
23a7fe75 | 624 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 625 | |
07bbe694 MM |
626 | /* If we're replaying, we start at the replay position. Otherwise, we |
627 | start at the tail of the trace. */ | |
628 | replay = btinfo->replay; | |
629 | if (replay != NULL) | |
630 | begin = *replay; | |
631 | else | |
632 | btrace_insn_end (&begin, btinfo); | |
633 | ||
634 | /* We start from here and expand in the requested direction. Then we | |
635 | expand in the other direction, as well, to fill up any remaining | |
636 | context. */ | |
637 | end = begin; | |
638 | if (size < 0) | |
639 | { | |
640 | /* We want the current position covered, as well. */ | |
641 | covered = btrace_insn_next (&end, 1); | |
642 | covered += btrace_insn_prev (&begin, context - covered); | |
643 | covered += btrace_insn_next (&end, context - covered); | |
644 | } | |
645 | else | |
646 | { | |
647 | covered = btrace_insn_next (&end, context); | |
648 | covered += btrace_insn_prev (&begin, context - covered); | |
649 | } | |
afedecd3 MM |
650 | } |
651 | else | |
652 | { | |
23a7fe75 MM |
653 | begin = history->begin; |
654 | end = history->end; | |
afedecd3 | 655 | |
23a7fe75 MM |
656 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
657 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 658 | |
23a7fe75 MM |
659 | if (size < 0) |
660 | { | |
661 | end = begin; | |
662 | covered = btrace_insn_prev (&begin, context); | |
663 | } | |
664 | else | |
665 | { | |
666 | begin = end; | |
667 | covered = btrace_insn_next (&end, context); | |
668 | } | |
afedecd3 MM |
669 | } |
670 | ||
23a7fe75 | 671 | if (covered > 0) |
31fd9caa | 672 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
673 | else |
674 | { | |
675 | if (size < 0) | |
676 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
677 | else | |
678 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
679 | } | |
afedecd3 | 680 | |
23a7fe75 | 681 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
682 | do_cleanups (uiout_cleanup); |
683 | } | |
684 | ||
685 | /* The to_insn_history_range method of target record-btrace. */ | |
686 | ||
687 | static void | |
4e99c6b7 TT |
688 | record_btrace_insn_history_range (struct target_ops *self, |
689 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
690 | { |
691 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
692 | struct btrace_insn_history *history; |
693 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
694 | struct cleanup *uiout_cleanup; |
695 | struct ui_out *uiout; | |
23a7fe75 MM |
696 | unsigned int low, high; |
697 | int found; | |
afedecd3 MM |
698 | |
699 | uiout = current_uiout; | |
700 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
701 | "insn history"); | |
23a7fe75 MM |
702 | low = from; |
703 | high = to; | |
afedecd3 | 704 | |
23a7fe75 | 705 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
706 | |
707 | /* Check for wrap-arounds. */ | |
23a7fe75 | 708 | if (low != from || high != to) |
afedecd3 MM |
709 | error (_("Bad range.")); |
710 | ||
0688d04e | 711 | if (high < low) |
afedecd3 MM |
712 | error (_("Bad range.")); |
713 | ||
23a7fe75 | 714 | btinfo = require_btrace (); |
afedecd3 | 715 | |
23a7fe75 MM |
716 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
717 | if (found == 0) | |
718 | error (_("Range out of bounds.")); | |
afedecd3 | 719 | |
23a7fe75 MM |
720 | found = btrace_find_insn_by_number (&end, btinfo, high); |
721 | if (found == 0) | |
0688d04e MM |
722 | { |
723 | /* Silently truncate the range. */ | |
724 | btrace_insn_end (&end, btinfo); | |
725 | } | |
726 | else | |
727 | { | |
728 | /* We want both begin and end to be inclusive. */ | |
729 | btrace_insn_next (&end, 1); | |
730 | } | |
afedecd3 | 731 | |
31fd9caa | 732 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 733 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
734 | |
735 | do_cleanups (uiout_cleanup); | |
736 | } | |
737 | ||
738 | /* The to_insn_history_from method of target record-btrace. */ | |
739 | ||
740 | static void | |
9abc3ff3 TT |
741 | record_btrace_insn_history_from (struct target_ops *self, |
742 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
743 | { |
744 | ULONGEST begin, end, context; | |
745 | ||
746 | context = abs (size); | |
0688d04e MM |
747 | if (context == 0) |
748 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
749 | |
750 | if (size < 0) | |
751 | { | |
752 | end = from; | |
753 | ||
754 | if (from < context) | |
755 | begin = 0; | |
756 | else | |
0688d04e | 757 | begin = from - context + 1; |
afedecd3 MM |
758 | } |
759 | else | |
760 | { | |
761 | begin = from; | |
0688d04e | 762 | end = from + context - 1; |
afedecd3 MM |
763 | |
764 | /* Check for wrap-around. */ | |
765 | if (end < begin) | |
766 | end = ULONGEST_MAX; | |
767 | } | |
768 | ||
4e99c6b7 | 769 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
770 | } |
771 | ||
772 | /* Print the instruction number range for a function call history line. */ | |
773 | ||
774 | static void | |
23a7fe75 MM |
775 | btrace_call_history_insn_range (struct ui_out *uiout, |
776 | const struct btrace_function *bfun) | |
afedecd3 | 777 | { |
7acbe133 MM |
778 | unsigned int begin, end, size; |
779 | ||
780 | size = VEC_length (btrace_insn_s, bfun->insn); | |
781 | gdb_assert (size > 0); | |
afedecd3 | 782 | |
23a7fe75 | 783 | begin = bfun->insn_offset; |
7acbe133 | 784 | end = begin + size - 1; |
afedecd3 | 785 | |
23a7fe75 | 786 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 787 | ui_out_text (uiout, ","); |
23a7fe75 | 788 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
789 | } |
790 | ||
ce0dfbea MM |
791 | /* Compute the lowest and highest source line for the instructions in BFUN |
792 | and return them in PBEGIN and PEND. | |
793 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
794 | result from inlining or macro expansion. */ | |
795 | ||
796 | static void | |
797 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
798 | int *pbegin, int *pend) | |
799 | { | |
800 | struct btrace_insn *insn; | |
801 | struct symtab *symtab; | |
802 | struct symbol *sym; | |
803 | unsigned int idx; | |
804 | int begin, end; | |
805 | ||
806 | begin = INT_MAX; | |
807 | end = INT_MIN; | |
808 | ||
809 | sym = bfun->sym; | |
810 | if (sym == NULL) | |
811 | goto out; | |
812 | ||
813 | symtab = symbol_symtab (sym); | |
814 | ||
815 | for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx) | |
816 | { | |
817 | struct symtab_and_line sal; | |
818 | ||
819 | sal = find_pc_line (insn->pc, 0); | |
820 | if (sal.symtab != symtab || sal.line == 0) | |
821 | continue; | |
822 | ||
823 | begin = min (begin, sal.line); | |
824 | end = max (end, sal.line); | |
825 | } | |
826 | ||
827 | out: | |
828 | *pbegin = begin; | |
829 | *pend = end; | |
830 | } | |
831 | ||
afedecd3 MM |
832 | /* Print the source line information for a function call history line. */ |
833 | ||
834 | static void | |
23a7fe75 MM |
835 | btrace_call_history_src_line (struct ui_out *uiout, |
836 | const struct btrace_function *bfun) | |
afedecd3 MM |
837 | { |
838 | struct symbol *sym; | |
23a7fe75 | 839 | int begin, end; |
afedecd3 MM |
840 | |
841 | sym = bfun->sym; | |
842 | if (sym == NULL) | |
843 | return; | |
844 | ||
845 | ui_out_field_string (uiout, "file", | |
08be3fe3 | 846 | symtab_to_filename_for_display (symbol_symtab (sym))); |
afedecd3 | 847 | |
ce0dfbea | 848 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 849 | if (end < begin) |
afedecd3 MM |
850 | return; |
851 | ||
852 | ui_out_text (uiout, ":"); | |
23a7fe75 | 853 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 854 | |
23a7fe75 | 855 | if (end == begin) |
afedecd3 MM |
856 | return; |
857 | ||
8710b709 | 858 | ui_out_text (uiout, ","); |
23a7fe75 | 859 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
860 | } |
861 | ||
0b722aec MM |
862 | /* Get the name of a branch trace function. */ |
863 | ||
864 | static const char * | |
865 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
866 | { | |
867 | struct minimal_symbol *msym; | |
868 | struct symbol *sym; | |
869 | ||
870 | if (bfun == NULL) | |
871 | return "??"; | |
872 | ||
873 | msym = bfun->msym; | |
874 | sym = bfun->sym; | |
875 | ||
876 | if (sym != NULL) | |
877 | return SYMBOL_PRINT_NAME (sym); | |
878 | else if (msym != NULL) | |
efd66ac6 | 879 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
880 | else |
881 | return "??"; | |
882 | } | |
883 | ||
afedecd3 MM |
884 | /* Disassemble a section of the recorded function trace. */ |
885 | ||
886 | static void | |
23a7fe75 | 887 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 888 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
889 | const struct btrace_call_iterator *begin, |
890 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
891 | enum record_print_flag flags) |
892 | { | |
23a7fe75 | 893 | struct btrace_call_iterator it; |
afedecd3 | 894 | |
23a7fe75 MM |
895 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
896 | btrace_call_number (end)); | |
afedecd3 | 897 | |
23a7fe75 | 898 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 899 | { |
23a7fe75 MM |
900 | const struct btrace_function *bfun; |
901 | struct minimal_symbol *msym; | |
902 | struct symbol *sym; | |
903 | ||
904 | bfun = btrace_call_get (&it); | |
23a7fe75 | 905 | sym = bfun->sym; |
0b722aec | 906 | msym = bfun->msym; |
23a7fe75 | 907 | |
afedecd3 | 908 | /* Print the function index. */ |
23a7fe75 | 909 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
910 | ui_out_text (uiout, "\t"); |
911 | ||
31fd9caa MM |
912 | /* Indicate gaps in the trace. */ |
913 | if (bfun->errcode != 0) | |
914 | { | |
915 | const struct btrace_config *conf; | |
916 | ||
917 | conf = btrace_conf (btinfo); | |
918 | ||
919 | /* We have trace so we must have a configuration. */ | |
920 | gdb_assert (conf != NULL); | |
921 | ||
922 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
923 | ||
924 | continue; | |
925 | } | |
926 | ||
8710b709 MM |
927 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
928 | { | |
929 | int level = bfun->level + btinfo->level, i; | |
930 | ||
931 | for (i = 0; i < level; ++i) | |
932 | ui_out_text (uiout, " "); | |
933 | } | |
934 | ||
935 | if (sym != NULL) | |
936 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
937 | else if (msym != NULL) | |
efd66ac6 | 938 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
939 | else if (!ui_out_is_mi_like_p (uiout)) |
940 | ui_out_field_string (uiout, "function", "??"); | |
941 | ||
1e038f67 | 942 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 943 | { |
8710b709 | 944 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 945 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
946 | } |
947 | ||
1e038f67 | 948 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 949 | { |
8710b709 | 950 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 951 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
952 | } |
953 | ||
afedecd3 MM |
954 | ui_out_text (uiout, "\n"); |
955 | } | |
956 | } | |
957 | ||
958 | /* The to_call_history method of target record-btrace. */ | |
959 | ||
960 | static void | |
5df2fcba | 961 | record_btrace_call_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
962 | { |
963 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
964 | struct btrace_call_history *history; |
965 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
966 | struct cleanup *uiout_cleanup; |
967 | struct ui_out *uiout; | |
23a7fe75 | 968 | unsigned int context, covered; |
afedecd3 MM |
969 | |
970 | uiout = current_uiout; | |
971 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
972 | "insn history"); | |
afedecd3 | 973 | context = abs (size); |
afedecd3 MM |
974 | if (context == 0) |
975 | error (_("Bad record function-call-history-size.")); | |
976 | ||
23a7fe75 MM |
977 | btinfo = require_btrace (); |
978 | history = btinfo->call_history; | |
979 | if (history == NULL) | |
afedecd3 | 980 | { |
07bbe694 | 981 | struct btrace_insn_iterator *replay; |
afedecd3 | 982 | |
23a7fe75 | 983 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 984 | |
07bbe694 MM |
985 | /* If we're replaying, we start at the replay position. Otherwise, we |
986 | start at the tail of the trace. */ | |
987 | replay = btinfo->replay; | |
988 | if (replay != NULL) | |
989 | { | |
990 | begin.function = replay->function; | |
991 | begin.btinfo = btinfo; | |
992 | } | |
993 | else | |
994 | btrace_call_end (&begin, btinfo); | |
995 | ||
996 | /* We start from here and expand in the requested direction. Then we | |
997 | expand in the other direction, as well, to fill up any remaining | |
998 | context. */ | |
999 | end = begin; | |
1000 | if (size < 0) | |
1001 | { | |
1002 | /* We want the current position covered, as well. */ | |
1003 | covered = btrace_call_next (&end, 1); | |
1004 | covered += btrace_call_prev (&begin, context - covered); | |
1005 | covered += btrace_call_next (&end, context - covered); | |
1006 | } | |
1007 | else | |
1008 | { | |
1009 | covered = btrace_call_next (&end, context); | |
1010 | covered += btrace_call_prev (&begin, context- covered); | |
1011 | } | |
afedecd3 MM |
1012 | } |
1013 | else | |
1014 | { | |
23a7fe75 MM |
1015 | begin = history->begin; |
1016 | end = history->end; | |
afedecd3 | 1017 | |
23a7fe75 MM |
1018 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
1019 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 1020 | |
23a7fe75 MM |
1021 | if (size < 0) |
1022 | { | |
1023 | end = begin; | |
1024 | covered = btrace_call_prev (&begin, context); | |
1025 | } | |
1026 | else | |
1027 | { | |
1028 | begin = end; | |
1029 | covered = btrace_call_next (&end, context); | |
1030 | } | |
afedecd3 MM |
1031 | } |
1032 | ||
23a7fe75 | 1033 | if (covered > 0) |
8710b709 | 1034 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1035 | else |
1036 | { | |
1037 | if (size < 0) | |
1038 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
1039 | else | |
1040 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
1041 | } | |
afedecd3 | 1042 | |
23a7fe75 | 1043 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1044 | do_cleanups (uiout_cleanup); |
1045 | } | |
1046 | ||
1047 | /* The to_call_history_range method of target record-btrace. */ | |
1048 | ||
1049 | static void | |
f0d960ea TT |
1050 | record_btrace_call_history_range (struct target_ops *self, |
1051 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
1052 | { |
1053 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1054 | struct btrace_call_history *history; |
1055 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
1056 | struct cleanup *uiout_cleanup; |
1057 | struct ui_out *uiout; | |
23a7fe75 MM |
1058 | unsigned int low, high; |
1059 | int found; | |
afedecd3 MM |
1060 | |
1061 | uiout = current_uiout; | |
1062 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
1063 | "func history"); | |
23a7fe75 MM |
1064 | low = from; |
1065 | high = to; | |
afedecd3 | 1066 | |
23a7fe75 | 1067 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
1068 | |
1069 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1070 | if (low != from || high != to) |
afedecd3 MM |
1071 | error (_("Bad range.")); |
1072 | ||
0688d04e | 1073 | if (high < low) |
afedecd3 MM |
1074 | error (_("Bad range.")); |
1075 | ||
23a7fe75 | 1076 | btinfo = require_btrace (); |
afedecd3 | 1077 | |
23a7fe75 MM |
1078 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1079 | if (found == 0) | |
1080 | error (_("Range out of bounds.")); | |
afedecd3 | 1081 | |
23a7fe75 MM |
1082 | found = btrace_find_call_by_number (&end, btinfo, high); |
1083 | if (found == 0) | |
0688d04e MM |
1084 | { |
1085 | /* Silently truncate the range. */ | |
1086 | btrace_call_end (&end, btinfo); | |
1087 | } | |
1088 | else | |
1089 | { | |
1090 | /* We want both begin and end to be inclusive. */ | |
1091 | btrace_call_next (&end, 1); | |
1092 | } | |
afedecd3 | 1093 | |
8710b709 | 1094 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1095 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1096 | |
1097 | do_cleanups (uiout_cleanup); | |
1098 | } | |
1099 | ||
1100 | /* The to_call_history_from method of target record-btrace. */ | |
1101 | ||
1102 | static void | |
ec0aea04 TT |
1103 | record_btrace_call_history_from (struct target_ops *self, |
1104 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
1105 | { |
1106 | ULONGEST begin, end, context; | |
1107 | ||
1108 | context = abs (size); | |
0688d04e MM |
1109 | if (context == 0) |
1110 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1111 | |
1112 | if (size < 0) | |
1113 | { | |
1114 | end = from; | |
1115 | ||
1116 | if (from < context) | |
1117 | begin = 0; | |
1118 | else | |
0688d04e | 1119 | begin = from - context + 1; |
afedecd3 MM |
1120 | } |
1121 | else | |
1122 | { | |
1123 | begin = from; | |
0688d04e | 1124 | end = from + context - 1; |
afedecd3 MM |
1125 | |
1126 | /* Check for wrap-around. */ | |
1127 | if (end < begin) | |
1128 | end = ULONGEST_MAX; | |
1129 | } | |
1130 | ||
f0d960ea | 1131 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
1132 | } |
1133 | ||
07bbe694 MM |
1134 | /* The to_record_is_replaying method of target record-btrace. */ |
1135 | ||
1136 | static int | |
a52eab48 | 1137 | record_btrace_is_replaying (struct target_ops *self, ptid_t ptid) |
07bbe694 MM |
1138 | { |
1139 | struct thread_info *tp; | |
1140 | ||
034f788c | 1141 | ALL_NON_EXITED_THREADS (tp) |
a52eab48 | 1142 | if (ptid_match (tp->ptid, ptid) && btrace_is_replaying (tp)) |
07bbe694 MM |
1143 | return 1; |
1144 | ||
1145 | return 0; | |
1146 | } | |
1147 | ||
7ff27e9b MM |
1148 | /* The to_record_will_replay method of target record-btrace. */ |
1149 | ||
1150 | static int | |
1151 | record_btrace_will_replay (struct target_ops *self, ptid_t ptid, int dir) | |
1152 | { | |
1153 | return dir == EXEC_REVERSE || record_btrace_is_replaying (self, ptid); | |
1154 | } | |
1155 | ||
633785ff MM |
1156 | /* The to_xfer_partial method of target record-btrace. */ |
1157 | ||
9b409511 | 1158 | static enum target_xfer_status |
633785ff MM |
1159 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
1160 | const char *annex, gdb_byte *readbuf, | |
1161 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 1162 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
1163 | { |
1164 | struct target_ops *t; | |
1165 | ||
1166 | /* Filter out requests that don't make sense during replay. */ | |
67b5c0c1 | 1167 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1168 | && !record_btrace_generating_corefile |
4d10e986 | 1169 | && record_btrace_is_replaying (ops, inferior_ptid)) |
633785ff MM |
1170 | { |
1171 | switch (object) | |
1172 | { | |
1173 | case TARGET_OBJECT_MEMORY: | |
1174 | { | |
1175 | struct target_section *section; | |
1176 | ||
1177 | /* We do not allow writing memory in general. */ | |
1178 | if (writebuf != NULL) | |
9b409511 YQ |
1179 | { |
1180 | *xfered_len = len; | |
bc113b4e | 1181 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1182 | } |
633785ff MM |
1183 | |
1184 | /* We allow reading readonly memory. */ | |
1185 | section = target_section_by_addr (ops, offset); | |
1186 | if (section != NULL) | |
1187 | { | |
1188 | /* Check if the section we found is readonly. */ | |
1189 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
1190 | section->the_bfd_section) | |
1191 | & SEC_READONLY) != 0) | |
1192 | { | |
1193 | /* Truncate the request to fit into this section. */ | |
1194 | len = min (len, section->endaddr - offset); | |
1195 | break; | |
1196 | } | |
1197 | } | |
1198 | ||
9b409511 | 1199 | *xfered_len = len; |
bc113b4e | 1200 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1201 | } |
1202 | } | |
1203 | } | |
1204 | ||
1205 | /* Forward the request. */ | |
e75fdfca TT |
1206 | ops = ops->beneath; |
1207 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
1208 | offset, len, xfered_len); | |
633785ff MM |
1209 | } |
1210 | ||
1211 | /* The to_insert_breakpoint method of target record-btrace. */ | |
1212 | ||
1213 | static int | |
1214 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
1215 | struct gdbarch *gdbarch, | |
1216 | struct bp_target_info *bp_tgt) | |
1217 | { | |
67b5c0c1 MM |
1218 | const char *old; |
1219 | int ret; | |
633785ff MM |
1220 | |
1221 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1222 | duration of this function. */ | |
67b5c0c1 MM |
1223 | old = replay_memory_access; |
1224 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1225 | |
1226 | ret = 0; | |
492d29ea PA |
1227 | TRY |
1228 | { | |
1229 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1230 | } | |
492d29ea PA |
1231 | CATCH (except, RETURN_MASK_ALL) |
1232 | { | |
6c63c96a | 1233 | replay_memory_access = old; |
492d29ea PA |
1234 | throw_exception (except); |
1235 | } | |
1236 | END_CATCH | |
6c63c96a | 1237 | replay_memory_access = old; |
633785ff MM |
1238 | |
1239 | return ret; | |
1240 | } | |
1241 | ||
1242 | /* The to_remove_breakpoint method of target record-btrace. */ | |
1243 | ||
1244 | static int | |
1245 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
1246 | struct gdbarch *gdbarch, | |
1247 | struct bp_target_info *bp_tgt) | |
1248 | { | |
67b5c0c1 MM |
1249 | const char *old; |
1250 | int ret; | |
633785ff MM |
1251 | |
1252 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1253 | duration of this function. */ | |
67b5c0c1 MM |
1254 | old = replay_memory_access; |
1255 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1256 | |
1257 | ret = 0; | |
492d29ea PA |
1258 | TRY |
1259 | { | |
1260 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
1261 | } | |
492d29ea PA |
1262 | CATCH (except, RETURN_MASK_ALL) |
1263 | { | |
6c63c96a | 1264 | replay_memory_access = old; |
492d29ea PA |
1265 | throw_exception (except); |
1266 | } | |
1267 | END_CATCH | |
6c63c96a | 1268 | replay_memory_access = old; |
633785ff MM |
1269 | |
1270 | return ret; | |
1271 | } | |
1272 | ||
1f3ef581 MM |
1273 | /* The to_fetch_registers method of target record-btrace. */ |
1274 | ||
1275 | static void | |
1276 | record_btrace_fetch_registers (struct target_ops *ops, | |
1277 | struct regcache *regcache, int regno) | |
1278 | { | |
1279 | struct btrace_insn_iterator *replay; | |
1280 | struct thread_info *tp; | |
1281 | ||
1282 | tp = find_thread_ptid (inferior_ptid); | |
1283 | gdb_assert (tp != NULL); | |
1284 | ||
1285 | replay = tp->btrace.replay; | |
aef92902 | 1286 | if (replay != NULL && !record_btrace_generating_corefile) |
1f3ef581 MM |
1287 | { |
1288 | const struct btrace_insn *insn; | |
1289 | struct gdbarch *gdbarch; | |
1290 | int pcreg; | |
1291 | ||
1292 | gdbarch = get_regcache_arch (regcache); | |
1293 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1294 | if (pcreg < 0) | |
1295 | return; | |
1296 | ||
1297 | /* We can only provide the PC register. */ | |
1298 | if (regno >= 0 && regno != pcreg) | |
1299 | return; | |
1300 | ||
1301 | insn = btrace_insn_get (replay); | |
1302 | gdb_assert (insn != NULL); | |
1303 | ||
1304 | regcache_raw_supply (regcache, regno, &insn->pc); | |
1305 | } | |
1306 | else | |
1307 | { | |
e75fdfca | 1308 | struct target_ops *t = ops->beneath; |
1f3ef581 | 1309 | |
e75fdfca | 1310 | t->to_fetch_registers (t, regcache, regno); |
1f3ef581 MM |
1311 | } |
1312 | } | |
1313 | ||
1314 | /* The to_store_registers method of target record-btrace. */ | |
1315 | ||
1316 | static void | |
1317 | record_btrace_store_registers (struct target_ops *ops, | |
1318 | struct regcache *regcache, int regno) | |
1319 | { | |
1320 | struct target_ops *t; | |
1321 | ||
a52eab48 | 1322 | if (!record_btrace_generating_corefile |
4d10e986 MM |
1323 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1324 | error (_("Cannot write registers while replaying.")); | |
1f3ef581 MM |
1325 | |
1326 | gdb_assert (may_write_registers != 0); | |
1327 | ||
e75fdfca TT |
1328 | t = ops->beneath; |
1329 | t->to_store_registers (t, regcache, regno); | |
1f3ef581 MM |
1330 | } |
1331 | ||
1332 | /* The to_prepare_to_store method of target record-btrace. */ | |
1333 | ||
1334 | static void | |
1335 | record_btrace_prepare_to_store (struct target_ops *ops, | |
1336 | struct regcache *regcache) | |
1337 | { | |
1338 | struct target_ops *t; | |
1339 | ||
a52eab48 | 1340 | if (!record_btrace_generating_corefile |
4d10e986 | 1341 | && record_btrace_is_replaying (ops, inferior_ptid)) |
1f3ef581 MM |
1342 | return; |
1343 | ||
e75fdfca TT |
1344 | t = ops->beneath; |
1345 | t->to_prepare_to_store (t, regcache); | |
1f3ef581 MM |
1346 | } |
1347 | ||
0b722aec MM |
1348 | /* The branch trace frame cache. */ |
1349 | ||
1350 | struct btrace_frame_cache | |
1351 | { | |
1352 | /* The thread. */ | |
1353 | struct thread_info *tp; | |
1354 | ||
1355 | /* The frame info. */ | |
1356 | struct frame_info *frame; | |
1357 | ||
1358 | /* The branch trace function segment. */ | |
1359 | const struct btrace_function *bfun; | |
1360 | }; | |
1361 | ||
1362 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1363 | ||
1364 | static htab_t bfcache; | |
1365 | ||
1366 | /* hash_f for htab_create_alloc of bfcache. */ | |
1367 | ||
1368 | static hashval_t | |
1369 | bfcache_hash (const void *arg) | |
1370 | { | |
19ba03f4 SM |
1371 | const struct btrace_frame_cache *cache |
1372 | = (const struct btrace_frame_cache *) arg; | |
0b722aec MM |
1373 | |
1374 | return htab_hash_pointer (cache->frame); | |
1375 | } | |
1376 | ||
1377 | /* eq_f for htab_create_alloc of bfcache. */ | |
1378 | ||
1379 | static int | |
1380 | bfcache_eq (const void *arg1, const void *arg2) | |
1381 | { | |
19ba03f4 SM |
1382 | const struct btrace_frame_cache *cache1 |
1383 | = (const struct btrace_frame_cache *) arg1; | |
1384 | const struct btrace_frame_cache *cache2 | |
1385 | = (const struct btrace_frame_cache *) arg2; | |
0b722aec MM |
1386 | |
1387 | return cache1->frame == cache2->frame; | |
1388 | } | |
1389 | ||
1390 | /* Create a new btrace frame cache. */ | |
1391 | ||
1392 | static struct btrace_frame_cache * | |
1393 | bfcache_new (struct frame_info *frame) | |
1394 | { | |
1395 | struct btrace_frame_cache *cache; | |
1396 | void **slot; | |
1397 | ||
1398 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1399 | cache->frame = frame; | |
1400 | ||
1401 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1402 | gdb_assert (*slot == NULL); | |
1403 | *slot = cache; | |
1404 | ||
1405 | return cache; | |
1406 | } | |
1407 | ||
1408 | /* Extract the branch trace function from a branch trace frame. */ | |
1409 | ||
1410 | static const struct btrace_function * | |
1411 | btrace_get_frame_function (struct frame_info *frame) | |
1412 | { | |
1413 | const struct btrace_frame_cache *cache; | |
1414 | const struct btrace_function *bfun; | |
1415 | struct btrace_frame_cache pattern; | |
1416 | void **slot; | |
1417 | ||
1418 | pattern.frame = frame; | |
1419 | ||
1420 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1421 | if (slot == NULL) | |
1422 | return NULL; | |
1423 | ||
19ba03f4 | 1424 | cache = (const struct btrace_frame_cache *) *slot; |
0b722aec MM |
1425 | return cache->bfun; |
1426 | } | |
1427 | ||
cecac1ab MM |
1428 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1429 | ||
1430 | static enum unwind_stop_reason | |
1431 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1432 | void **this_cache) | |
1433 | { | |
0b722aec MM |
1434 | const struct btrace_frame_cache *cache; |
1435 | const struct btrace_function *bfun; | |
1436 | ||
19ba03f4 | 1437 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1438 | bfun = cache->bfun; |
1439 | gdb_assert (bfun != NULL); | |
1440 | ||
1441 | if (bfun->up == NULL) | |
1442 | return UNWIND_UNAVAILABLE; | |
1443 | ||
1444 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1445 | } |
1446 | ||
1447 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1448 | ||
1449 | static void | |
1450 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1451 | struct frame_id *this_id) | |
1452 | { | |
0b722aec MM |
1453 | const struct btrace_frame_cache *cache; |
1454 | const struct btrace_function *bfun; | |
1455 | CORE_ADDR code, special; | |
1456 | ||
19ba03f4 | 1457 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1458 | |
1459 | bfun = cache->bfun; | |
1460 | gdb_assert (bfun != NULL); | |
1461 | ||
1462 | while (bfun->segment.prev != NULL) | |
1463 | bfun = bfun->segment.prev; | |
1464 | ||
1465 | code = get_frame_func (this_frame); | |
1466 | special = bfun->number; | |
1467 | ||
1468 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1469 | ||
1470 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1471 | btrace_get_bfun_name (cache->bfun), | |
1472 | core_addr_to_string_nz (this_id->code_addr), | |
1473 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1474 | } |
1475 | ||
1476 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1477 | ||
1478 | static struct value * | |
1479 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1480 | void **this_cache, | |
1481 | int regnum) | |
1482 | { | |
0b722aec MM |
1483 | const struct btrace_frame_cache *cache; |
1484 | const struct btrace_function *bfun, *caller; | |
1485 | const struct btrace_insn *insn; | |
1486 | struct gdbarch *gdbarch; | |
1487 | CORE_ADDR pc; | |
1488 | int pcreg; | |
1489 | ||
1490 | gdbarch = get_frame_arch (this_frame); | |
1491 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1492 | if (pcreg < 0 || regnum != pcreg) | |
1493 | throw_error (NOT_AVAILABLE_ERROR, | |
1494 | _("Registers are not available in btrace record history")); | |
1495 | ||
19ba03f4 | 1496 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1497 | bfun = cache->bfun; |
1498 | gdb_assert (bfun != NULL); | |
1499 | ||
1500 | caller = bfun->up; | |
1501 | if (caller == NULL) | |
1502 | throw_error (NOT_AVAILABLE_ERROR, | |
1503 | _("No caller in btrace record history")); | |
1504 | ||
1505 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1506 | { | |
1507 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1508 | pc = insn->pc; | |
1509 | } | |
1510 | else | |
1511 | { | |
1512 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1513 | pc = insn->pc; | |
1514 | ||
1515 | pc += gdb_insn_length (gdbarch, pc); | |
1516 | } | |
1517 | ||
1518 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1519 | btrace_get_bfun_name (bfun), bfun->level, | |
1520 | core_addr_to_string_nz (pc)); | |
1521 | ||
1522 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1523 | } |
1524 | ||
1525 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1526 | ||
1527 | static int | |
1528 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1529 | struct frame_info *this_frame, | |
1530 | void **this_cache) | |
1531 | { | |
0b722aec MM |
1532 | const struct btrace_function *bfun; |
1533 | struct btrace_frame_cache *cache; | |
cecac1ab | 1534 | struct thread_info *tp; |
0b722aec | 1535 | struct frame_info *next; |
cecac1ab MM |
1536 | |
1537 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1538 | tp = find_thread_ptid (inferior_ptid); | |
1539 | gdb_assert (tp != NULL); | |
1540 | ||
0b722aec MM |
1541 | bfun = NULL; |
1542 | next = get_next_frame (this_frame); | |
1543 | if (next == NULL) | |
1544 | { | |
1545 | const struct btrace_insn_iterator *replay; | |
1546 | ||
1547 | replay = tp->btrace.replay; | |
1548 | if (replay != NULL) | |
1549 | bfun = replay->function; | |
1550 | } | |
1551 | else | |
1552 | { | |
1553 | const struct btrace_function *callee; | |
1554 | ||
1555 | callee = btrace_get_frame_function (next); | |
1556 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1557 | bfun = callee->up; | |
1558 | } | |
1559 | ||
1560 | if (bfun == NULL) | |
1561 | return 0; | |
1562 | ||
1563 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1564 | btrace_get_bfun_name (bfun), bfun->level); | |
1565 | ||
1566 | /* This is our frame. Initialize the frame cache. */ | |
1567 | cache = bfcache_new (this_frame); | |
1568 | cache->tp = tp; | |
1569 | cache->bfun = bfun; | |
1570 | ||
1571 | *this_cache = cache; | |
1572 | return 1; | |
1573 | } | |
1574 | ||
1575 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1576 | ||
1577 | static int | |
1578 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1579 | struct frame_info *this_frame, | |
1580 | void **this_cache) | |
1581 | { | |
1582 | const struct btrace_function *bfun, *callee; | |
1583 | struct btrace_frame_cache *cache; | |
1584 | struct frame_info *next; | |
1585 | ||
1586 | next = get_next_frame (this_frame); | |
1587 | if (next == NULL) | |
1588 | return 0; | |
1589 | ||
1590 | callee = btrace_get_frame_function (next); | |
1591 | if (callee == NULL) | |
1592 | return 0; | |
1593 | ||
1594 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1595 | return 0; | |
1596 | ||
1597 | bfun = callee->up; | |
1598 | if (bfun == NULL) | |
1599 | return 0; | |
1600 | ||
1601 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1602 | btrace_get_bfun_name (bfun), bfun->level); | |
1603 | ||
1604 | /* This is our frame. Initialize the frame cache. */ | |
1605 | cache = bfcache_new (this_frame); | |
1606 | cache->tp = find_thread_ptid (inferior_ptid); | |
1607 | cache->bfun = bfun; | |
1608 | ||
1609 | *this_cache = cache; | |
1610 | return 1; | |
1611 | } | |
1612 | ||
1613 | static void | |
1614 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1615 | { | |
1616 | struct btrace_frame_cache *cache; | |
1617 | void **slot; | |
1618 | ||
19ba03f4 | 1619 | cache = (struct btrace_frame_cache *) this_cache; |
0b722aec MM |
1620 | |
1621 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1622 | gdb_assert (slot != NULL); | |
1623 | ||
1624 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1625 | } |
1626 | ||
1627 | /* btrace recording does not store previous memory content, neither the stack | |
1628 | frames content. Any unwinding would return errorneous results as the stack | |
1629 | contents no longer matches the changed PC value restored from history. | |
1630 | Therefore this unwinder reports any possibly unwound registers as | |
1631 | <unavailable>. */ | |
1632 | ||
0b722aec | 1633 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1634 | { |
1635 | NORMAL_FRAME, | |
1636 | record_btrace_frame_unwind_stop_reason, | |
1637 | record_btrace_frame_this_id, | |
1638 | record_btrace_frame_prev_register, | |
1639 | NULL, | |
0b722aec MM |
1640 | record_btrace_frame_sniffer, |
1641 | record_btrace_frame_dealloc_cache | |
1642 | }; | |
1643 | ||
1644 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1645 | { | |
1646 | TAILCALL_FRAME, | |
1647 | record_btrace_frame_unwind_stop_reason, | |
1648 | record_btrace_frame_this_id, | |
1649 | record_btrace_frame_prev_register, | |
1650 | NULL, | |
1651 | record_btrace_tailcall_frame_sniffer, | |
1652 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1653 | }; |
b2f4cfde | 1654 | |
ac01945b TT |
1655 | /* Implement the to_get_unwinder method. */ |
1656 | ||
1657 | static const struct frame_unwind * | |
1658 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1659 | { | |
1660 | return &record_btrace_frame_unwind; | |
1661 | } | |
1662 | ||
1663 | /* Implement the to_get_tailcall_unwinder method. */ | |
1664 | ||
1665 | static const struct frame_unwind * | |
1666 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1667 | { | |
1668 | return &record_btrace_tailcall_frame_unwind; | |
1669 | } | |
1670 | ||
987e68b1 MM |
1671 | /* Return a human-readable string for FLAG. */ |
1672 | ||
1673 | static const char * | |
1674 | btrace_thread_flag_to_str (enum btrace_thread_flag flag) | |
1675 | { | |
1676 | switch (flag) | |
1677 | { | |
1678 | case BTHR_STEP: | |
1679 | return "step"; | |
1680 | ||
1681 | case BTHR_RSTEP: | |
1682 | return "reverse-step"; | |
1683 | ||
1684 | case BTHR_CONT: | |
1685 | return "cont"; | |
1686 | ||
1687 | case BTHR_RCONT: | |
1688 | return "reverse-cont"; | |
1689 | ||
1690 | case BTHR_STOP: | |
1691 | return "stop"; | |
1692 | } | |
1693 | ||
1694 | return "<invalid>"; | |
1695 | } | |
1696 | ||
52834460 MM |
1697 | /* Indicate that TP should be resumed according to FLAG. */ |
1698 | ||
1699 | static void | |
1700 | record_btrace_resume_thread (struct thread_info *tp, | |
1701 | enum btrace_thread_flag flag) | |
1702 | { | |
1703 | struct btrace_thread_info *btinfo; | |
1704 | ||
987e68b1 MM |
1705 | DEBUG ("resuming thread %d (%s): %x (%s)", tp->num, |
1706 | target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag)); | |
52834460 MM |
1707 | |
1708 | btinfo = &tp->btrace; | |
1709 | ||
52834460 MM |
1710 | /* Fetch the latest branch trace. */ |
1711 | btrace_fetch (tp); | |
1712 | ||
0ca912df MM |
1713 | /* A resume request overwrites a preceding resume or stop request. */ |
1714 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1715 | btinfo->flags |= flag; |
1716 | } | |
1717 | ||
ec71cc2f MM |
1718 | /* Get the current frame for TP. */ |
1719 | ||
1720 | static struct frame_info * | |
1721 | get_thread_current_frame (struct thread_info *tp) | |
1722 | { | |
1723 | struct frame_info *frame; | |
1724 | ptid_t old_inferior_ptid; | |
1725 | int executing; | |
1726 | ||
1727 | /* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */ | |
1728 | old_inferior_ptid = inferior_ptid; | |
1729 | inferior_ptid = tp->ptid; | |
1730 | ||
1731 | /* Clear the executing flag to allow changes to the current frame. | |
1732 | We are not actually running, yet. We just started a reverse execution | |
1733 | command or a record goto command. | |
1734 | For the latter, EXECUTING is false and this has no effect. | |
1735 | For the former, EXECUTING is true and we're in to_wait, about to | |
1736 | move the thread. Since we need to recompute the stack, we temporarily | |
1737 | set EXECUTING to flase. */ | |
1738 | executing = is_executing (inferior_ptid); | |
1739 | set_executing (inferior_ptid, 0); | |
1740 | ||
1741 | frame = NULL; | |
1742 | TRY | |
1743 | { | |
1744 | frame = get_current_frame (); | |
1745 | } | |
1746 | CATCH (except, RETURN_MASK_ALL) | |
1747 | { | |
1748 | /* Restore the previous execution state. */ | |
1749 | set_executing (inferior_ptid, executing); | |
1750 | ||
1751 | /* Restore the previous inferior_ptid. */ | |
1752 | inferior_ptid = old_inferior_ptid; | |
1753 | ||
1754 | throw_exception (except); | |
1755 | } | |
1756 | END_CATCH | |
1757 | ||
1758 | /* Restore the previous execution state. */ | |
1759 | set_executing (inferior_ptid, executing); | |
1760 | ||
1761 | /* Restore the previous inferior_ptid. */ | |
1762 | inferior_ptid = old_inferior_ptid; | |
1763 | ||
1764 | return frame; | |
1765 | } | |
1766 | ||
52834460 MM |
1767 | /* Start replaying a thread. */ |
1768 | ||
1769 | static struct btrace_insn_iterator * | |
1770 | record_btrace_start_replaying (struct thread_info *tp) | |
1771 | { | |
52834460 MM |
1772 | struct btrace_insn_iterator *replay; |
1773 | struct btrace_thread_info *btinfo; | |
52834460 MM |
1774 | |
1775 | btinfo = &tp->btrace; | |
1776 | replay = NULL; | |
1777 | ||
1778 | /* We can't start replaying without trace. */ | |
1779 | if (btinfo->begin == NULL) | |
1780 | return NULL; | |
1781 | ||
52834460 MM |
1782 | /* GDB stores the current frame_id when stepping in order to detects steps |
1783 | into subroutines. | |
1784 | Since frames are computed differently when we're replaying, we need to | |
1785 | recompute those stored frames and fix them up so we can still detect | |
1786 | subroutines after we started replaying. */ | |
492d29ea | 1787 | TRY |
52834460 MM |
1788 | { |
1789 | struct frame_info *frame; | |
1790 | struct frame_id frame_id; | |
1791 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1792 | ||
1793 | /* The current frame without replaying - computed via normal unwind. */ | |
ec71cc2f | 1794 | frame = get_thread_current_frame (tp); |
52834460 MM |
1795 | frame_id = get_frame_id (frame); |
1796 | ||
1797 | /* Check if we need to update any stepping-related frame id's. */ | |
1798 | upd_step_frame_id = frame_id_eq (frame_id, | |
1799 | tp->control.step_frame_id); | |
1800 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1801 | tp->control.step_stack_frame_id); | |
1802 | ||
1803 | /* We start replaying at the end of the branch trace. This corresponds | |
1804 | to the current instruction. */ | |
8d749320 | 1805 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
1806 | btrace_insn_end (replay, btinfo); |
1807 | ||
31fd9caa MM |
1808 | /* Skip gaps at the end of the trace. */ |
1809 | while (btrace_insn_get (replay) == NULL) | |
1810 | { | |
1811 | unsigned int steps; | |
1812 | ||
1813 | steps = btrace_insn_prev (replay, 1); | |
1814 | if (steps == 0) | |
1815 | error (_("No trace.")); | |
1816 | } | |
1817 | ||
52834460 MM |
1818 | /* We're not replaying, yet. */ |
1819 | gdb_assert (btinfo->replay == NULL); | |
1820 | btinfo->replay = replay; | |
1821 | ||
1822 | /* Make sure we're not using any stale registers. */ | |
1823 | registers_changed_ptid (tp->ptid); | |
1824 | ||
1825 | /* The current frame with replaying - computed via btrace unwind. */ | |
ec71cc2f | 1826 | frame = get_thread_current_frame (tp); |
52834460 MM |
1827 | frame_id = get_frame_id (frame); |
1828 | ||
1829 | /* Replace stepping related frames where necessary. */ | |
1830 | if (upd_step_frame_id) | |
1831 | tp->control.step_frame_id = frame_id; | |
1832 | if (upd_step_stack_frame_id) | |
1833 | tp->control.step_stack_frame_id = frame_id; | |
1834 | } | |
492d29ea | 1835 | CATCH (except, RETURN_MASK_ALL) |
52834460 MM |
1836 | { |
1837 | xfree (btinfo->replay); | |
1838 | btinfo->replay = NULL; | |
1839 | ||
1840 | registers_changed_ptid (tp->ptid); | |
1841 | ||
1842 | throw_exception (except); | |
1843 | } | |
492d29ea | 1844 | END_CATCH |
52834460 MM |
1845 | |
1846 | return replay; | |
1847 | } | |
1848 | ||
1849 | /* Stop replaying a thread. */ | |
1850 | ||
1851 | static void | |
1852 | record_btrace_stop_replaying (struct thread_info *tp) | |
1853 | { | |
1854 | struct btrace_thread_info *btinfo; | |
1855 | ||
1856 | btinfo = &tp->btrace; | |
1857 | ||
1858 | xfree (btinfo->replay); | |
1859 | btinfo->replay = NULL; | |
1860 | ||
1861 | /* Make sure we're not leaving any stale registers. */ | |
1862 | registers_changed_ptid (tp->ptid); | |
1863 | } | |
1864 | ||
e3cfc1c7 MM |
1865 | /* Stop replaying TP if it is at the end of its execution history. */ |
1866 | ||
1867 | static void | |
1868 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
1869 | { | |
1870 | struct btrace_insn_iterator *replay, end; | |
1871 | struct btrace_thread_info *btinfo; | |
1872 | ||
1873 | btinfo = &tp->btrace; | |
1874 | replay = btinfo->replay; | |
1875 | ||
1876 | if (replay == NULL) | |
1877 | return; | |
1878 | ||
1879 | btrace_insn_end (&end, btinfo); | |
1880 | ||
1881 | if (btrace_insn_cmp (replay, &end) == 0) | |
1882 | record_btrace_stop_replaying (tp); | |
1883 | } | |
1884 | ||
b2f4cfde MM |
1885 | /* The to_resume method of target record-btrace. */ |
1886 | ||
1887 | static void | |
1888 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1889 | enum gdb_signal signal) | |
1890 | { | |
0ca912df | 1891 | struct thread_info *tp; |
d2939ba2 | 1892 | enum btrace_thread_flag flag, cflag; |
52834460 | 1893 | |
987e68b1 MM |
1894 | DEBUG ("resume %s: %s%s", target_pid_to_str (ptid), |
1895 | execution_direction == EXEC_REVERSE ? "reverse-" : "", | |
1896 | step ? "step" : "cont"); | |
52834460 | 1897 | |
0ca912df MM |
1898 | /* Store the execution direction of the last resume. |
1899 | ||
1900 | If there is more than one to_resume call, we have to rely on infrun | |
1901 | to not change the execution direction in-between. */ | |
70ad5bff MM |
1902 | record_btrace_resume_exec_dir = execution_direction; |
1903 | ||
0ca912df | 1904 | /* As long as we're not replaying, just forward the request. |
52834460 | 1905 | |
0ca912df MM |
1906 | For non-stop targets this means that no thread is replaying. In order to |
1907 | make progress, we may need to explicitly move replaying threads to the end | |
1908 | of their execution history. */ | |
a52eab48 MM |
1909 | if ((execution_direction != EXEC_REVERSE) |
1910 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 1911 | { |
e75fdfca | 1912 | ops = ops->beneath; |
d2939ba2 | 1913 | return ops->to_resume (ops, ptid, step, signal); |
b2f4cfde MM |
1914 | } |
1915 | ||
52834460 | 1916 | /* Compute the btrace thread flag for the requested move. */ |
d2939ba2 MM |
1917 | if (execution_direction == EXEC_REVERSE) |
1918 | { | |
1919 | flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP; | |
1920 | cflag = BTHR_RCONT; | |
1921 | } | |
52834460 | 1922 | else |
d2939ba2 MM |
1923 | { |
1924 | flag = step == 0 ? BTHR_CONT : BTHR_STEP; | |
1925 | cflag = BTHR_CONT; | |
1926 | } | |
52834460 | 1927 | |
52834460 | 1928 | /* We just indicate the resume intent here. The actual stepping happens in |
d2939ba2 MM |
1929 | record_btrace_wait below. |
1930 | ||
1931 | For all-stop targets, we only step INFERIOR_PTID and continue others. */ | |
1932 | if (!target_is_non_stop_p ()) | |
1933 | { | |
1934 | gdb_assert (ptid_match (inferior_ptid, ptid)); | |
1935 | ||
1936 | ALL_NON_EXITED_THREADS (tp) | |
1937 | if (ptid_match (tp->ptid, ptid)) | |
1938 | { | |
1939 | if (ptid_match (tp->ptid, inferior_ptid)) | |
1940 | record_btrace_resume_thread (tp, flag); | |
1941 | else | |
1942 | record_btrace_resume_thread (tp, cflag); | |
1943 | } | |
1944 | } | |
1945 | else | |
1946 | { | |
1947 | ALL_NON_EXITED_THREADS (tp) | |
1948 | if (ptid_match (tp->ptid, ptid)) | |
1949 | record_btrace_resume_thread (tp, flag); | |
1950 | } | |
70ad5bff MM |
1951 | |
1952 | /* Async support. */ | |
1953 | if (target_can_async_p ()) | |
1954 | { | |
6a3753b3 | 1955 | target_async (1); |
70ad5bff MM |
1956 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
1957 | } | |
52834460 MM |
1958 | } |
1959 | ||
987e68b1 MM |
1960 | /* Cancel resuming TP. */ |
1961 | ||
1962 | static void | |
1963 | record_btrace_cancel_resume (struct thread_info *tp) | |
1964 | { | |
1965 | enum btrace_thread_flag flags; | |
1966 | ||
1967 | flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP); | |
1968 | if (flags == 0) | |
1969 | return; | |
1970 | ||
1971 | DEBUG ("cancel resume thread %d (%s): %x (%s)", tp->num, | |
1972 | target_pid_to_str (tp->ptid), flags, | |
1973 | btrace_thread_flag_to_str (flags)); | |
1974 | ||
1975 | tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP); | |
e3cfc1c7 | 1976 | record_btrace_stop_replaying_at_end (tp); |
52834460 MM |
1977 | } |
1978 | ||
1979 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1980 | ||
1981 | static struct target_waitstatus | |
1982 | btrace_step_no_history (void) | |
1983 | { | |
1984 | struct target_waitstatus status; | |
1985 | ||
1986 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1987 | ||
1988 | return status; | |
1989 | } | |
1990 | ||
1991 | /* Return a target_waitstatus indicating that a step finished. */ | |
1992 | ||
1993 | static struct target_waitstatus | |
1994 | btrace_step_stopped (void) | |
1995 | { | |
1996 | struct target_waitstatus status; | |
1997 | ||
1998 | status.kind = TARGET_WAITKIND_STOPPED; | |
1999 | status.value.sig = GDB_SIGNAL_TRAP; | |
2000 | ||
2001 | return status; | |
2002 | } | |
2003 | ||
6e4879f0 MM |
2004 | /* Return a target_waitstatus indicating that a thread was stopped as |
2005 | requested. */ | |
2006 | ||
2007 | static struct target_waitstatus | |
2008 | btrace_step_stopped_on_request (void) | |
2009 | { | |
2010 | struct target_waitstatus status; | |
2011 | ||
2012 | status.kind = TARGET_WAITKIND_STOPPED; | |
2013 | status.value.sig = GDB_SIGNAL_0; | |
2014 | ||
2015 | return status; | |
2016 | } | |
2017 | ||
d825d248 MM |
2018 | /* Return a target_waitstatus indicating a spurious stop. */ |
2019 | ||
2020 | static struct target_waitstatus | |
2021 | btrace_step_spurious (void) | |
2022 | { | |
2023 | struct target_waitstatus status; | |
2024 | ||
2025 | status.kind = TARGET_WAITKIND_SPURIOUS; | |
2026 | ||
2027 | return status; | |
2028 | } | |
2029 | ||
e3cfc1c7 MM |
2030 | /* Return a target_waitstatus indicating that the thread was not resumed. */ |
2031 | ||
2032 | static struct target_waitstatus | |
2033 | btrace_step_no_resumed (void) | |
2034 | { | |
2035 | struct target_waitstatus status; | |
2036 | ||
2037 | status.kind = TARGET_WAITKIND_NO_RESUMED; | |
2038 | ||
2039 | return status; | |
2040 | } | |
2041 | ||
2042 | /* Return a target_waitstatus indicating that we should wait again. */ | |
2043 | ||
2044 | static struct target_waitstatus | |
2045 | btrace_step_again (void) | |
2046 | { | |
2047 | struct target_waitstatus status; | |
2048 | ||
2049 | status.kind = TARGET_WAITKIND_IGNORE; | |
2050 | ||
2051 | return status; | |
2052 | } | |
2053 | ||
52834460 MM |
2054 | /* Clear the record histories. */ |
2055 | ||
2056 | static void | |
2057 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
2058 | { | |
2059 | xfree (btinfo->insn_history); | |
2060 | xfree (btinfo->call_history); | |
2061 | ||
2062 | btinfo->insn_history = NULL; | |
2063 | btinfo->call_history = NULL; | |
2064 | } | |
2065 | ||
3c615f99 MM |
2066 | /* Check whether TP's current replay position is at a breakpoint. */ |
2067 | ||
2068 | static int | |
2069 | record_btrace_replay_at_breakpoint (struct thread_info *tp) | |
2070 | { | |
2071 | struct btrace_insn_iterator *replay; | |
2072 | struct btrace_thread_info *btinfo; | |
2073 | const struct btrace_insn *insn; | |
2074 | struct inferior *inf; | |
2075 | ||
2076 | btinfo = &tp->btrace; | |
2077 | replay = btinfo->replay; | |
2078 | ||
2079 | if (replay == NULL) | |
2080 | return 0; | |
2081 | ||
2082 | insn = btrace_insn_get (replay); | |
2083 | if (insn == NULL) | |
2084 | return 0; | |
2085 | ||
2086 | inf = find_inferior_ptid (tp->ptid); | |
2087 | if (inf == NULL) | |
2088 | return 0; | |
2089 | ||
2090 | return record_check_stopped_by_breakpoint (inf->aspace, insn->pc, | |
2091 | &btinfo->stop_reason); | |
2092 | } | |
2093 | ||
d825d248 | 2094 | /* Step one instruction in forward direction. */ |
52834460 MM |
2095 | |
2096 | static struct target_waitstatus | |
d825d248 | 2097 | record_btrace_single_step_forward (struct thread_info *tp) |
52834460 MM |
2098 | { |
2099 | struct btrace_insn_iterator *replay, end; | |
2100 | struct btrace_thread_info *btinfo; | |
52834460 | 2101 | |
d825d248 MM |
2102 | btinfo = &tp->btrace; |
2103 | replay = btinfo->replay; | |
2104 | ||
2105 | /* We're done if we're not replaying. */ | |
2106 | if (replay == NULL) | |
2107 | return btrace_step_no_history (); | |
2108 | ||
011c71b6 MM |
2109 | /* Check if we're stepping a breakpoint. */ |
2110 | if (record_btrace_replay_at_breakpoint (tp)) | |
2111 | return btrace_step_stopped (); | |
2112 | ||
d825d248 MM |
2113 | /* Skip gaps during replay. */ |
2114 | do | |
2115 | { | |
2116 | unsigned int steps; | |
2117 | ||
e3cfc1c7 MM |
2118 | /* We will bail out here if we continue stepping after reaching the end |
2119 | of the execution history. */ | |
d825d248 MM |
2120 | steps = btrace_insn_next (replay, 1); |
2121 | if (steps == 0) | |
e3cfc1c7 | 2122 | return btrace_step_no_history (); |
d825d248 MM |
2123 | } |
2124 | while (btrace_insn_get (replay) == NULL); | |
2125 | ||
2126 | /* Determine the end of the instruction trace. */ | |
2127 | btrace_insn_end (&end, btinfo); | |
2128 | ||
e3cfc1c7 MM |
2129 | /* The execution trace contains (and ends with) the current instruction. |
2130 | This instruction has not been executed, yet, so the trace really ends | |
2131 | one instruction earlier. */ | |
d825d248 | 2132 | if (btrace_insn_cmp (replay, &end) == 0) |
e3cfc1c7 | 2133 | return btrace_step_no_history (); |
d825d248 MM |
2134 | |
2135 | return btrace_step_spurious (); | |
2136 | } | |
2137 | ||
2138 | /* Step one instruction in backward direction. */ | |
2139 | ||
2140 | static struct target_waitstatus | |
2141 | record_btrace_single_step_backward (struct thread_info *tp) | |
2142 | { | |
2143 | struct btrace_insn_iterator *replay; | |
2144 | struct btrace_thread_info *btinfo; | |
e59fa00f | 2145 | |
52834460 MM |
2146 | btinfo = &tp->btrace; |
2147 | replay = btinfo->replay; | |
2148 | ||
d825d248 MM |
2149 | /* Start replaying if we're not already doing so. */ |
2150 | if (replay == NULL) | |
2151 | replay = record_btrace_start_replaying (tp); | |
2152 | ||
2153 | /* If we can't step any further, we reached the end of the history. | |
2154 | Skip gaps during replay. */ | |
2155 | do | |
2156 | { | |
2157 | unsigned int steps; | |
2158 | ||
2159 | steps = btrace_insn_prev (replay, 1); | |
2160 | if (steps == 0) | |
2161 | return btrace_step_no_history (); | |
2162 | } | |
2163 | while (btrace_insn_get (replay) == NULL); | |
2164 | ||
011c71b6 MM |
2165 | /* Check if we're stepping a breakpoint. |
2166 | ||
2167 | For reverse-stepping, this check is after the step. There is logic in | |
2168 | infrun.c that handles reverse-stepping separately. See, for example, | |
2169 | proceed and adjust_pc_after_break. | |
2170 | ||
2171 | This code assumes that for reverse-stepping, PC points to the last | |
2172 | de-executed instruction, whereas for forward-stepping PC points to the | |
2173 | next to-be-executed instruction. */ | |
2174 | if (record_btrace_replay_at_breakpoint (tp)) | |
2175 | return btrace_step_stopped (); | |
2176 | ||
d825d248 MM |
2177 | return btrace_step_spurious (); |
2178 | } | |
2179 | ||
2180 | /* Step a single thread. */ | |
2181 | ||
2182 | static struct target_waitstatus | |
2183 | record_btrace_step_thread (struct thread_info *tp) | |
2184 | { | |
2185 | struct btrace_thread_info *btinfo; | |
2186 | struct target_waitstatus status; | |
2187 | enum btrace_thread_flag flags; | |
2188 | ||
2189 | btinfo = &tp->btrace; | |
2190 | ||
6e4879f0 MM |
2191 | flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP); |
2192 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 | 2193 | |
987e68b1 MM |
2194 | DEBUG ("stepping thread %d (%s): %x (%s)", tp->num, |
2195 | target_pid_to_str (tp->ptid), flags, | |
2196 | btrace_thread_flag_to_str (flags)); | |
52834460 | 2197 | |
6e4879f0 MM |
2198 | /* We can't step without an execution history. */ |
2199 | if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp)) | |
2200 | return btrace_step_no_history (); | |
2201 | ||
52834460 MM |
2202 | switch (flags) |
2203 | { | |
2204 | default: | |
2205 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
2206 | ||
6e4879f0 MM |
2207 | case BTHR_STOP: |
2208 | return btrace_step_stopped_on_request (); | |
2209 | ||
52834460 | 2210 | case BTHR_STEP: |
d825d248 MM |
2211 | status = record_btrace_single_step_forward (tp); |
2212 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2213 | break; |
52834460 MM |
2214 | |
2215 | return btrace_step_stopped (); | |
2216 | ||
2217 | case BTHR_RSTEP: | |
d825d248 MM |
2218 | status = record_btrace_single_step_backward (tp); |
2219 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
e3cfc1c7 | 2220 | break; |
52834460 MM |
2221 | |
2222 | return btrace_step_stopped (); | |
2223 | ||
2224 | case BTHR_CONT: | |
e3cfc1c7 MM |
2225 | status = record_btrace_single_step_forward (tp); |
2226 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2227 | break; | |
52834460 | 2228 | |
e3cfc1c7 MM |
2229 | btinfo->flags |= flags; |
2230 | return btrace_step_again (); | |
52834460 MM |
2231 | |
2232 | case BTHR_RCONT: | |
e3cfc1c7 MM |
2233 | status = record_btrace_single_step_backward (tp); |
2234 | if (status.kind != TARGET_WAITKIND_SPURIOUS) | |
2235 | break; | |
52834460 | 2236 | |
e3cfc1c7 MM |
2237 | btinfo->flags |= flags; |
2238 | return btrace_step_again (); | |
2239 | } | |
d825d248 | 2240 | |
e3cfc1c7 MM |
2241 | /* We keep threads moving at the end of their execution history. The to_wait |
2242 | method will stop the thread for whom the event is reported. */ | |
2243 | if (status.kind == TARGET_WAITKIND_NO_HISTORY) | |
2244 | btinfo->flags |= flags; | |
52834460 | 2245 | |
e3cfc1c7 | 2246 | return status; |
b2f4cfde MM |
2247 | } |
2248 | ||
e3cfc1c7 MM |
2249 | /* A vector of threads. */ |
2250 | ||
2251 | typedef struct thread_info * tp_t; | |
2252 | DEF_VEC_P (tp_t); | |
2253 | ||
a6b5be76 MM |
2254 | /* Announce further events if necessary. */ |
2255 | ||
2256 | static void | |
2257 | record_btrace_maybe_mark_async_event (const VEC (tp_t) *moving, | |
2258 | const VEC (tp_t) *no_history) | |
2259 | { | |
2260 | int more_moving, more_no_history; | |
2261 | ||
2262 | more_moving = !VEC_empty (tp_t, moving); | |
2263 | more_no_history = !VEC_empty (tp_t, no_history); | |
2264 | ||
2265 | if (!more_moving && !more_no_history) | |
2266 | return; | |
2267 | ||
2268 | if (more_moving) | |
2269 | DEBUG ("movers pending"); | |
2270 | ||
2271 | if (more_no_history) | |
2272 | DEBUG ("no-history pending"); | |
2273 | ||
2274 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
2275 | } | |
2276 | ||
b2f4cfde MM |
2277 | /* The to_wait method of target record-btrace. */ |
2278 | ||
2279 | static ptid_t | |
2280 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
2281 | struct target_waitstatus *status, int options) | |
2282 | { | |
e3cfc1c7 MM |
2283 | VEC (tp_t) *moving, *no_history; |
2284 | struct thread_info *tp, *eventing; | |
2285 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
52834460 MM |
2286 | |
2287 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
2288 | ||
b2f4cfde | 2289 | /* As long as we're not replaying, just forward the request. */ |
a52eab48 MM |
2290 | if ((execution_direction != EXEC_REVERSE) |
2291 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
b2f4cfde | 2292 | { |
e75fdfca TT |
2293 | ops = ops->beneath; |
2294 | return ops->to_wait (ops, ptid, status, options); | |
b2f4cfde MM |
2295 | } |
2296 | ||
e3cfc1c7 MM |
2297 | moving = NULL; |
2298 | no_history = NULL; | |
2299 | ||
2300 | make_cleanup (VEC_cleanup (tp_t), &moving); | |
2301 | make_cleanup (VEC_cleanup (tp_t), &no_history); | |
2302 | ||
2303 | /* Keep a work list of moving threads. */ | |
2304 | ALL_NON_EXITED_THREADS (tp) | |
2305 | if (ptid_match (tp->ptid, ptid) | |
2306 | && ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)) | |
2307 | VEC_safe_push (tp_t, moving, tp); | |
2308 | ||
2309 | if (VEC_empty (tp_t, moving)) | |
52834460 | 2310 | { |
e3cfc1c7 | 2311 | *status = btrace_step_no_resumed (); |
52834460 | 2312 | |
e3cfc1c7 MM |
2313 | DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid), |
2314 | target_waitstatus_to_string (status)); | |
2315 | ||
2316 | do_cleanups (cleanups); | |
2317 | return null_ptid; | |
52834460 MM |
2318 | } |
2319 | ||
e3cfc1c7 MM |
2320 | /* Step moving threads one by one, one step each, until either one thread |
2321 | reports an event or we run out of threads to step. | |
2322 | ||
2323 | When stepping more than one thread, chances are that some threads reach | |
2324 | the end of their execution history earlier than others. If we reported | |
2325 | this immediately, all-stop on top of non-stop would stop all threads and | |
2326 | resume the same threads next time. And we would report the same thread | |
2327 | having reached the end of its execution history again. | |
2328 | ||
2329 | In the worst case, this would starve the other threads. But even if other | |
2330 | threads would be allowed to make progress, this would result in far too | |
2331 | many intermediate stops. | |
2332 | ||
2333 | We therefore delay the reporting of "no execution history" until we have | |
2334 | nothing else to report. By this time, all threads should have moved to | |
2335 | either the beginning or the end of their execution history. There will | |
2336 | be a single user-visible stop. */ | |
2337 | eventing = NULL; | |
2338 | while ((eventing == NULL) && !VEC_empty (tp_t, moving)) | |
2339 | { | |
2340 | unsigned int ix; | |
2341 | ||
2342 | ix = 0; | |
2343 | while ((eventing == NULL) && VEC_iterate (tp_t, moving, ix, tp)) | |
2344 | { | |
2345 | *status = record_btrace_step_thread (tp); | |
2346 | ||
2347 | switch (status->kind) | |
2348 | { | |
2349 | case TARGET_WAITKIND_IGNORE: | |
2350 | ix++; | |
2351 | break; | |
2352 | ||
2353 | case TARGET_WAITKIND_NO_HISTORY: | |
2354 | VEC_safe_push (tp_t, no_history, | |
2355 | VEC_ordered_remove (tp_t, moving, ix)); | |
2356 | break; | |
2357 | ||
2358 | default: | |
2359 | eventing = VEC_unordered_remove (tp_t, moving, ix); | |
2360 | break; | |
2361 | } | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | if (eventing == NULL) | |
2366 | { | |
2367 | /* We started with at least one moving thread. This thread must have | |
2368 | either stopped or reached the end of its execution history. | |
2369 | ||
2370 | In the former case, EVENTING must not be NULL. | |
2371 | In the latter case, NO_HISTORY must not be empty. */ | |
2372 | gdb_assert (!VEC_empty (tp_t, no_history)); | |
2373 | ||
2374 | /* We kept threads moving at the end of their execution history. Stop | |
2375 | EVENTING now that we are going to report its stop. */ | |
2376 | eventing = VEC_unordered_remove (tp_t, no_history, 0); | |
2377 | eventing->btrace.flags &= ~BTHR_MOVE; | |
2378 | ||
2379 | *status = btrace_step_no_history (); | |
2380 | } | |
2381 | ||
2382 | gdb_assert (eventing != NULL); | |
2383 | ||
2384 | /* We kept threads replaying at the end of their execution history. Stop | |
2385 | replaying EVENTING now that we are going to report its stop. */ | |
2386 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2387 | |
2388 | /* Stop all other threads. */ | |
5953356c | 2389 | if (!target_is_non_stop_p ()) |
e3cfc1c7 MM |
2390 | ALL_NON_EXITED_THREADS (tp) |
2391 | record_btrace_cancel_resume (tp); | |
52834460 | 2392 | |
a6b5be76 MM |
2393 | /* In async mode, we need to announce further events. */ |
2394 | if (target_is_async_p ()) | |
2395 | record_btrace_maybe_mark_async_event (moving, no_history); | |
2396 | ||
52834460 | 2397 | /* Start record histories anew from the current position. */ |
e3cfc1c7 | 2398 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2399 | |
2400 | /* We moved the replay position but did not update registers. */ | |
e3cfc1c7 MM |
2401 | registers_changed_ptid (eventing->ptid); |
2402 | ||
2403 | DEBUG ("wait ended by thread %d (%s): %s", eventing->num, | |
2404 | target_pid_to_str (eventing->ptid), | |
2405 | target_waitstatus_to_string (status)); | |
52834460 | 2406 | |
e3cfc1c7 MM |
2407 | do_cleanups (cleanups); |
2408 | return eventing->ptid; | |
52834460 MM |
2409 | } |
2410 | ||
6e4879f0 MM |
2411 | /* The to_stop method of target record-btrace. */ |
2412 | ||
2413 | static void | |
2414 | record_btrace_stop (struct target_ops *ops, ptid_t ptid) | |
2415 | { | |
2416 | DEBUG ("stop %s", target_pid_to_str (ptid)); | |
2417 | ||
2418 | /* As long as we're not replaying, just forward the request. */ | |
a52eab48 MM |
2419 | if ((execution_direction != EXEC_REVERSE) |
2420 | && !record_btrace_is_replaying (ops, minus_one_ptid)) | |
6e4879f0 MM |
2421 | { |
2422 | ops = ops->beneath; | |
2423 | ops->to_stop (ops, ptid); | |
2424 | } | |
2425 | else | |
2426 | { | |
2427 | struct thread_info *tp; | |
2428 | ||
2429 | ALL_NON_EXITED_THREADS (tp) | |
2430 | if (ptid_match (tp->ptid, ptid)) | |
2431 | { | |
2432 | tp->btrace.flags &= ~BTHR_MOVE; | |
2433 | tp->btrace.flags |= BTHR_STOP; | |
2434 | } | |
2435 | } | |
2436 | } | |
2437 | ||
52834460 MM |
2438 | /* The to_can_execute_reverse method of target record-btrace. */ |
2439 | ||
2440 | static int | |
19db3e69 | 2441 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
2442 | { |
2443 | return 1; | |
2444 | } | |
2445 | ||
9e8915c6 | 2446 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2447 | |
9e8915c6 PA |
2448 | static int |
2449 | record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops) | |
52834460 | 2450 | { |
a52eab48 | 2451 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2452 | { |
2453 | struct thread_info *tp = inferior_thread (); | |
2454 | ||
2455 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2456 | } | |
2457 | ||
2458 | return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath); | |
2459 | } | |
2460 | ||
2461 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
2462 | record-btrace. */ | |
2463 | ||
2464 | static int | |
2465 | record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
2466 | { | |
a52eab48 | 2467 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2468 | return 1; |
2469 | ||
2470 | return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath); | |
2471 | } | |
2472 | ||
2473 | /* The to_stopped_by_sw_breakpoint method of target record-btrace. */ | |
2474 | ||
2475 | static int | |
2476 | record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2477 | { | |
a52eab48 | 2478 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 PA |
2479 | { |
2480 | struct thread_info *tp = inferior_thread (); | |
2481 | ||
2482 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2483 | } | |
2484 | ||
2485 | return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath); | |
2486 | } | |
2487 | ||
2488 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
2489 | record-btrace. */ | |
2490 | ||
2491 | static int | |
2492 | record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
2493 | { | |
a52eab48 | 2494 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
9e8915c6 | 2495 | return 1; |
52834460 | 2496 | |
9e8915c6 | 2497 | return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath); |
b2f4cfde MM |
2498 | } |
2499 | ||
e8032dde | 2500 | /* The to_update_thread_list method of target record-btrace. */ |
e2887aa3 MM |
2501 | |
2502 | static void | |
e8032dde | 2503 | record_btrace_update_thread_list (struct target_ops *ops) |
e2887aa3 | 2504 | { |
e8032dde | 2505 | /* We don't add or remove threads during replay. */ |
a52eab48 | 2506 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2507 | return; |
2508 | ||
2509 | /* Forward the request. */ | |
e75fdfca | 2510 | ops = ops->beneath; |
e8032dde | 2511 | ops->to_update_thread_list (ops); |
e2887aa3 MM |
2512 | } |
2513 | ||
2514 | /* The to_thread_alive method of target record-btrace. */ | |
2515 | ||
2516 | static int | |
2517 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2518 | { | |
2519 | /* We don't add or remove threads during replay. */ | |
a52eab48 | 2520 | if (record_btrace_is_replaying (ops, minus_one_ptid)) |
e2887aa3 MM |
2521 | return find_thread_ptid (ptid) != NULL; |
2522 | ||
2523 | /* Forward the request. */ | |
e75fdfca TT |
2524 | ops = ops->beneath; |
2525 | return ops->to_thread_alive (ops, ptid); | |
e2887aa3 MM |
2526 | } |
2527 | ||
066ce621 MM |
2528 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2529 | is stopped. */ | |
2530 | ||
2531 | static void | |
2532 | record_btrace_set_replay (struct thread_info *tp, | |
2533 | const struct btrace_insn_iterator *it) | |
2534 | { | |
2535 | struct btrace_thread_info *btinfo; | |
2536 | ||
2537 | btinfo = &tp->btrace; | |
2538 | ||
2539 | if (it == NULL || it->function == NULL) | |
52834460 | 2540 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2541 | else |
2542 | { | |
2543 | if (btinfo->replay == NULL) | |
52834460 | 2544 | record_btrace_start_replaying (tp); |
066ce621 MM |
2545 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2546 | return; | |
2547 | ||
2548 | *btinfo->replay = *it; | |
52834460 | 2549 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
2550 | } |
2551 | ||
52834460 MM |
2552 | /* Start anew from the new replay position. */ |
2553 | record_btrace_clear_histories (btinfo); | |
485668e5 MM |
2554 | |
2555 | stop_pc = regcache_read_pc (get_current_regcache ()); | |
2556 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
066ce621 MM |
2557 | } |
2558 | ||
2559 | /* The to_goto_record_begin method of target record-btrace. */ | |
2560 | ||
2561 | static void | |
08475817 | 2562 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
2563 | { |
2564 | struct thread_info *tp; | |
2565 | struct btrace_insn_iterator begin; | |
2566 | ||
2567 | tp = require_btrace_thread (); | |
2568 | ||
2569 | btrace_insn_begin (&begin, &tp->btrace); | |
2570 | record_btrace_set_replay (tp, &begin); | |
066ce621 MM |
2571 | } |
2572 | ||
2573 | /* The to_goto_record_end method of target record-btrace. */ | |
2574 | ||
2575 | static void | |
307a1b91 | 2576 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
2577 | { |
2578 | struct thread_info *tp; | |
2579 | ||
2580 | tp = require_btrace_thread (); | |
2581 | ||
2582 | record_btrace_set_replay (tp, NULL); | |
066ce621 MM |
2583 | } |
2584 | ||
2585 | /* The to_goto_record method of target record-btrace. */ | |
2586 | ||
2587 | static void | |
606183ac | 2588 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
2589 | { |
2590 | struct thread_info *tp; | |
2591 | struct btrace_insn_iterator it; | |
2592 | unsigned int number; | |
2593 | int found; | |
2594 | ||
2595 | number = insn; | |
2596 | ||
2597 | /* Check for wrap-arounds. */ | |
2598 | if (number != insn) | |
2599 | error (_("Instruction number out of range.")); | |
2600 | ||
2601 | tp = require_btrace_thread (); | |
2602 | ||
2603 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
2604 | if (found == 0) | |
2605 | error (_("No such instruction.")); | |
2606 | ||
2607 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2608 | } |
2609 | ||
797094dd MM |
2610 | /* The to_record_stop_replaying method of target record-btrace. */ |
2611 | ||
2612 | static void | |
2613 | record_btrace_stop_replaying_all (struct target_ops *self) | |
2614 | { | |
2615 | struct thread_info *tp; | |
2616 | ||
2617 | ALL_NON_EXITED_THREADS (tp) | |
2618 | record_btrace_stop_replaying (tp); | |
2619 | } | |
2620 | ||
70ad5bff MM |
2621 | /* The to_execution_direction target method. */ |
2622 | ||
2623 | static enum exec_direction_kind | |
2624 | record_btrace_execution_direction (struct target_ops *self) | |
2625 | { | |
2626 | return record_btrace_resume_exec_dir; | |
2627 | } | |
2628 | ||
aef92902 MM |
2629 | /* The to_prepare_to_generate_core target method. */ |
2630 | ||
2631 | static void | |
2632 | record_btrace_prepare_to_generate_core (struct target_ops *self) | |
2633 | { | |
2634 | record_btrace_generating_corefile = 1; | |
2635 | } | |
2636 | ||
2637 | /* The to_done_generating_core target method. */ | |
2638 | ||
2639 | static void | |
2640 | record_btrace_done_generating_core (struct target_ops *self) | |
2641 | { | |
2642 | record_btrace_generating_corefile = 0; | |
2643 | } | |
2644 | ||
afedecd3 MM |
2645 | /* Initialize the record-btrace target ops. */ |
2646 | ||
2647 | static void | |
2648 | init_record_btrace_ops (void) | |
2649 | { | |
2650 | struct target_ops *ops; | |
2651 | ||
2652 | ops = &record_btrace_ops; | |
2653 | ops->to_shortname = "record-btrace"; | |
2654 | ops->to_longname = "Branch tracing target"; | |
2655 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
2656 | ops->to_open = record_btrace_open; | |
2657 | ops->to_close = record_btrace_close; | |
b7d2e916 | 2658 | ops->to_async = record_btrace_async; |
afedecd3 MM |
2659 | ops->to_detach = record_detach; |
2660 | ops->to_disconnect = record_disconnect; | |
2661 | ops->to_mourn_inferior = record_mourn_inferior; | |
2662 | ops->to_kill = record_kill; | |
afedecd3 MM |
2663 | ops->to_stop_recording = record_btrace_stop_recording; |
2664 | ops->to_info_record = record_btrace_info; | |
2665 | ops->to_insn_history = record_btrace_insn_history; | |
2666 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
2667 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
2668 | ops->to_call_history = record_btrace_call_history; | |
2669 | ops->to_call_history_from = record_btrace_call_history_from; | |
2670 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 2671 | ops->to_record_is_replaying = record_btrace_is_replaying; |
7ff27e9b | 2672 | ops->to_record_will_replay = record_btrace_will_replay; |
797094dd | 2673 | ops->to_record_stop_replaying = record_btrace_stop_replaying_all; |
633785ff MM |
2674 | ops->to_xfer_partial = record_btrace_xfer_partial; |
2675 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
2676 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
2677 | ops->to_fetch_registers = record_btrace_fetch_registers; |
2678 | ops->to_store_registers = record_btrace_store_registers; | |
2679 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
2680 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
2681 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
2682 | ops->to_resume = record_btrace_resume; |
2683 | ops->to_wait = record_btrace_wait; | |
6e4879f0 | 2684 | ops->to_stop = record_btrace_stop; |
e8032dde | 2685 | ops->to_update_thread_list = record_btrace_update_thread_list; |
e2887aa3 | 2686 | ops->to_thread_alive = record_btrace_thread_alive; |
066ce621 MM |
2687 | ops->to_goto_record_begin = record_btrace_goto_begin; |
2688 | ops->to_goto_record_end = record_btrace_goto_end; | |
2689 | ops->to_goto_record = record_btrace_goto; | |
52834460 | 2690 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
9e8915c6 PA |
2691 | ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint; |
2692 | ops->to_supports_stopped_by_sw_breakpoint | |
2693 | = record_btrace_supports_stopped_by_sw_breakpoint; | |
2694 | ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint; | |
2695 | ops->to_supports_stopped_by_hw_breakpoint | |
2696 | = record_btrace_supports_stopped_by_hw_breakpoint; | |
70ad5bff | 2697 | ops->to_execution_direction = record_btrace_execution_direction; |
aef92902 MM |
2698 | ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core; |
2699 | ops->to_done_generating_core = record_btrace_done_generating_core; | |
afedecd3 MM |
2700 | ops->to_stratum = record_stratum; |
2701 | ops->to_magic = OPS_MAGIC; | |
2702 | } | |
2703 | ||
f4abbc16 MM |
2704 | /* Start recording in BTS format. */ |
2705 | ||
2706 | static void | |
2707 | cmd_record_btrace_bts_start (char *args, int from_tty) | |
2708 | { | |
f4abbc16 MM |
2709 | if (args != NULL && *args != 0) |
2710 | error (_("Invalid argument.")); | |
2711 | ||
2712 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2713 | ||
492d29ea PA |
2714 | TRY |
2715 | { | |
2716 | execute_command ("target record-btrace", from_tty); | |
2717 | } | |
2718 | CATCH (exception, RETURN_MASK_ALL) | |
f4abbc16 MM |
2719 | { |
2720 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2721 | throw_exception (exception); | |
2722 | } | |
492d29ea | 2723 | END_CATCH |
f4abbc16 MM |
2724 | } |
2725 | ||
b20a6524 | 2726 | /* Start recording Intel(R) Processor Trace. */ |
afedecd3 MM |
2727 | |
2728 | static void | |
b20a6524 | 2729 | cmd_record_btrace_pt_start (char *args, int from_tty) |
afedecd3 MM |
2730 | { |
2731 | if (args != NULL && *args != 0) | |
2732 | error (_("Invalid argument.")); | |
2733 | ||
b20a6524 | 2734 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2735 | |
492d29ea PA |
2736 | TRY |
2737 | { | |
2738 | execute_command ("target record-btrace", from_tty); | |
2739 | } | |
2740 | CATCH (exception, RETURN_MASK_ALL) | |
2741 | { | |
2742 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2743 | throw_exception (exception); | |
2744 | } | |
2745 | END_CATCH | |
afedecd3 MM |
2746 | } |
2747 | ||
b20a6524 MM |
2748 | /* Alias for "target record". */ |
2749 | ||
2750 | static void | |
2751 | cmd_record_btrace_start (char *args, int from_tty) | |
2752 | { | |
2753 | if (args != NULL && *args != 0) | |
2754 | error (_("Invalid argument.")); | |
2755 | ||
2756 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2757 | ||
2758 | TRY | |
2759 | { | |
2760 | execute_command ("target record-btrace", from_tty); | |
2761 | } | |
2762 | CATCH (exception, RETURN_MASK_ALL) | |
2763 | { | |
2764 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2765 | ||
2766 | TRY | |
2767 | { | |
2768 | execute_command ("target record-btrace", from_tty); | |
2769 | } | |
2770 | CATCH (exception, RETURN_MASK_ALL) | |
2771 | { | |
2772 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
2773 | throw_exception (exception); | |
2774 | } | |
2775 | END_CATCH | |
2776 | } | |
2777 | END_CATCH | |
2778 | } | |
2779 | ||
67b5c0c1 MM |
2780 | /* The "set record btrace" command. */ |
2781 | ||
2782 | static void | |
2783 | cmd_set_record_btrace (char *args, int from_tty) | |
2784 | { | |
2785 | cmd_show_list (set_record_btrace_cmdlist, from_tty, ""); | |
2786 | } | |
2787 | ||
2788 | /* The "show record btrace" command. */ | |
2789 | ||
2790 | static void | |
2791 | cmd_show_record_btrace (char *args, int from_tty) | |
2792 | { | |
2793 | cmd_show_list (show_record_btrace_cmdlist, from_tty, ""); | |
2794 | } | |
2795 | ||
2796 | /* The "show record btrace replay-memory-access" command. */ | |
2797 | ||
2798 | static void | |
2799 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2800 | struct cmd_list_element *c, const char *value) | |
2801 | { | |
2802 | fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"), | |
2803 | replay_memory_access); | |
2804 | } | |
2805 | ||
d33501a5 MM |
2806 | /* The "set record btrace bts" command. */ |
2807 | ||
2808 | static void | |
2809 | cmd_set_record_btrace_bts (char *args, int from_tty) | |
2810 | { | |
2811 | printf_unfiltered (_("\"set record btrace bts\" must be followed " | |
b20a6524 | 2812 | "by an appropriate subcommand.\n")); |
d33501a5 MM |
2813 | help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ", |
2814 | all_commands, gdb_stdout); | |
2815 | } | |
2816 | ||
2817 | /* The "show record btrace bts" command. */ | |
2818 | ||
2819 | static void | |
2820 | cmd_show_record_btrace_bts (char *args, int from_tty) | |
2821 | { | |
2822 | cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, ""); | |
2823 | } | |
2824 | ||
b20a6524 MM |
2825 | /* The "set record btrace pt" command. */ |
2826 | ||
2827 | static void | |
2828 | cmd_set_record_btrace_pt (char *args, int from_tty) | |
2829 | { | |
2830 | printf_unfiltered (_("\"set record btrace pt\" must be followed " | |
2831 | "by an appropriate subcommand.\n")); | |
2832 | help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ", | |
2833 | all_commands, gdb_stdout); | |
2834 | } | |
2835 | ||
2836 | /* The "show record btrace pt" command. */ | |
2837 | ||
2838 | static void | |
2839 | cmd_show_record_btrace_pt (char *args, int from_tty) | |
2840 | { | |
2841 | cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, ""); | |
2842 | } | |
2843 | ||
2844 | /* The "record bts buffer-size" show value function. */ | |
2845 | ||
2846 | static void | |
2847 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
2848 | struct cmd_list_element *c, | |
2849 | const char *value) | |
2850 | { | |
2851 | fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"), | |
2852 | value); | |
2853 | } | |
2854 | ||
2855 | /* The "record pt buffer-size" show value function. */ | |
2856 | ||
2857 | static void | |
2858 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
2859 | struct cmd_list_element *c, | |
2860 | const char *value) | |
2861 | { | |
2862 | fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"), | |
2863 | value); | |
2864 | } | |
2865 | ||
afedecd3 MM |
2866 | void _initialize_record_btrace (void); |
2867 | ||
2868 | /* Initialize btrace commands. */ | |
2869 | ||
2870 | void | |
2871 | _initialize_record_btrace (void) | |
2872 | { | |
f4abbc16 MM |
2873 | add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, |
2874 | _("Start branch trace recording."), &record_btrace_cmdlist, | |
2875 | "record btrace ", 0, &record_cmdlist); | |
afedecd3 MM |
2876 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); |
2877 | ||
f4abbc16 MM |
2878 | add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, |
2879 | _("\ | |
2880 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ | |
2881 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
2882 | This format may not be available on all processors."), | |
2883 | &record_btrace_cmdlist); | |
2884 | add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist); | |
2885 | ||
b20a6524 MM |
2886 | add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, |
2887 | _("\ | |
2888 | Start branch trace recording in Intel(R) Processor Trace format.\n\n\ | |
2889 | This format may not be available on all processors."), | |
2890 | &record_btrace_cmdlist); | |
2891 | add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist); | |
2892 | ||
67b5c0c1 MM |
2893 | add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace, |
2894 | _("Set record options"), &set_record_btrace_cmdlist, | |
2895 | "set record btrace ", 0, &set_record_cmdlist); | |
2896 | ||
2897 | add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace, | |
2898 | _("Show record options"), &show_record_btrace_cmdlist, | |
2899 | "show record btrace ", 0, &show_record_cmdlist); | |
2900 | ||
2901 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
2902 | replay_memory_access_types, &replay_memory_access, _("\ | |
2903 | Set what memory accesses are allowed during replay."), _("\ | |
2904 | Show what memory accesses are allowed during replay."), | |
2905 | _("Default is READ-ONLY.\n\n\ | |
2906 | The btrace record target does not trace data.\n\ | |
2907 | The memory therefore corresponds to the live target and not \ | |
2908 | to the current replay position.\n\n\ | |
2909 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
2910 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
2911 | replay."), | |
2912 | NULL, cmd_show_replay_memory_access, | |
2913 | &set_record_btrace_cmdlist, | |
2914 | &show_record_btrace_cmdlist); | |
2915 | ||
d33501a5 MM |
2916 | add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts, |
2917 | _("Set record btrace bts options"), | |
2918 | &set_record_btrace_bts_cmdlist, | |
2919 | "set record btrace bts ", 0, &set_record_btrace_cmdlist); | |
2920 | ||
2921 | add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts, | |
2922 | _("Show record btrace bts options"), | |
2923 | &show_record_btrace_bts_cmdlist, | |
2924 | "show record btrace bts ", 0, &show_record_btrace_cmdlist); | |
2925 | ||
2926 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2927 | &record_btrace_conf.bts.size, | |
2928 | _("Set the record/replay bts buffer size."), | |
2929 | _("Show the record/replay bts buffer size."), _("\ | |
2930 | When starting recording request a trace buffer of this size. \ | |
2931 | The actual buffer size may differ from the requested size. \ | |
2932 | Use \"info record\" to see the actual buffer size.\n\n\ | |
2933 | Bigger buffers allow longer recording but also take more time to process \ | |
2934 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
2935 | The trace buffer size may not be changed while recording."), NULL, |
2936 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
2937 | &set_record_btrace_bts_cmdlist, |
2938 | &show_record_btrace_bts_cmdlist); | |
2939 | ||
b20a6524 MM |
2940 | add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt, |
2941 | _("Set record btrace pt options"), | |
2942 | &set_record_btrace_pt_cmdlist, | |
2943 | "set record btrace pt ", 0, &set_record_btrace_cmdlist); | |
2944 | ||
2945 | add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt, | |
2946 | _("Show record btrace pt options"), | |
2947 | &show_record_btrace_pt_cmdlist, | |
2948 | "show record btrace pt ", 0, &show_record_btrace_cmdlist); | |
2949 | ||
2950 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
2951 | &record_btrace_conf.pt.size, | |
2952 | _("Set the record/replay pt buffer size."), | |
2953 | _("Show the record/replay pt buffer size."), _("\ | |
2954 | Bigger buffers allow longer recording but also take more time to process \ | |
2955 | the recorded execution.\n\ | |
2956 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
2957 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
2958 | &set_record_btrace_pt_cmdlist, | |
2959 | &show_record_btrace_pt_cmdlist); | |
2960 | ||
afedecd3 MM |
2961 | init_record_btrace_ops (); |
2962 | add_target (&record_btrace_ops); | |
0b722aec MM |
2963 | |
2964 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
2965 | xcalloc, xfree); | |
d33501a5 MM |
2966 | |
2967 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 2968 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 2969 | } |