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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2013-2014 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" | |
29 | #include "exceptions.h" | |
30 | #include "cli/cli-utils.h" | |
31 | #include "source.h" | |
32 | #include "ui-out.h" | |
33 | #include "symtab.h" | |
34 | #include "filenames.h" | |
1f3ef581 | 35 | #include "regcache.h" |
cecac1ab | 36 | #include "frame-unwind.h" |
0b722aec | 37 | #include "hashtab.h" |
afedecd3 MM |
38 | |
39 | /* The target_ops of record-btrace. */ | |
40 | static struct target_ops record_btrace_ops; | |
41 | ||
42 | /* A new thread observer enabling branch tracing for the new thread. */ | |
43 | static struct observer *record_btrace_thread_observer; | |
44 | ||
633785ff MM |
45 | /* Temporarily allow memory accesses. */ |
46 | static int record_btrace_allow_memory_access; | |
47 | ||
afedecd3 MM |
48 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
49 | ambiguities when used in if statements. */ | |
50 | ||
51 | #define DEBUG(msg, args...) \ | |
52 | do \ | |
53 | { \ | |
54 | if (record_debug != 0) \ | |
55 | fprintf_unfiltered (gdb_stdlog, \ | |
56 | "[record-btrace] " msg "\n", ##args); \ | |
57 | } \ | |
58 | while (0) | |
59 | ||
60 | ||
61 | /* Update the branch trace for the current thread and return a pointer to its | |
066ce621 | 62 | thread_info. |
afedecd3 MM |
63 | |
64 | Throws an error if there is no thread or no trace. This function never | |
65 | returns NULL. */ | |
66 | ||
066ce621 MM |
67 | static struct thread_info * |
68 | require_btrace_thread (void) | |
afedecd3 MM |
69 | { |
70 | struct thread_info *tp; | |
afedecd3 MM |
71 | |
72 | DEBUG ("require"); | |
73 | ||
74 | tp = find_thread_ptid (inferior_ptid); | |
75 | if (tp == NULL) | |
76 | error (_("No thread.")); | |
77 | ||
78 | btrace_fetch (tp); | |
79 | ||
6e07b1d2 | 80 | if (btrace_is_empty (tp)) |
afedecd3 MM |
81 | error (_("No trace.")); |
82 | ||
066ce621 MM |
83 | return tp; |
84 | } | |
85 | ||
86 | /* Update the branch trace for the current thread and return a pointer to its | |
87 | branch trace information struct. | |
88 | ||
89 | Throws an error if there is no thread or no trace. This function never | |
90 | returns NULL. */ | |
91 | ||
92 | static struct btrace_thread_info * | |
93 | require_btrace (void) | |
94 | { | |
95 | struct thread_info *tp; | |
96 | ||
97 | tp = require_btrace_thread (); | |
98 | ||
99 | return &tp->btrace; | |
afedecd3 MM |
100 | } |
101 | ||
102 | /* Enable branch tracing for one thread. Warn on errors. */ | |
103 | ||
104 | static void | |
105 | record_btrace_enable_warn (struct thread_info *tp) | |
106 | { | |
107 | volatile struct gdb_exception error; | |
108 | ||
109 | TRY_CATCH (error, RETURN_MASK_ERROR) | |
110 | btrace_enable (tp); | |
111 | ||
112 | if (error.message != NULL) | |
113 | warning ("%s", error.message); | |
114 | } | |
115 | ||
116 | /* Callback function to disable branch tracing for one thread. */ | |
117 | ||
118 | static void | |
119 | record_btrace_disable_callback (void *arg) | |
120 | { | |
121 | struct thread_info *tp; | |
122 | ||
123 | tp = arg; | |
124 | ||
125 | btrace_disable (tp); | |
126 | } | |
127 | ||
128 | /* Enable automatic tracing of new threads. */ | |
129 | ||
130 | static void | |
131 | record_btrace_auto_enable (void) | |
132 | { | |
133 | DEBUG ("attach thread observer"); | |
134 | ||
135 | record_btrace_thread_observer | |
136 | = observer_attach_new_thread (record_btrace_enable_warn); | |
137 | } | |
138 | ||
139 | /* Disable automatic tracing of new threads. */ | |
140 | ||
141 | static void | |
142 | record_btrace_auto_disable (void) | |
143 | { | |
144 | /* The observer may have been detached, already. */ | |
145 | if (record_btrace_thread_observer == NULL) | |
146 | return; | |
147 | ||
148 | DEBUG ("detach thread observer"); | |
149 | ||
150 | observer_detach_new_thread (record_btrace_thread_observer); | |
151 | record_btrace_thread_observer = NULL; | |
152 | } | |
153 | ||
154 | /* The to_open method of target record-btrace. */ | |
155 | ||
156 | static void | |
157 | record_btrace_open (char *args, int from_tty) | |
158 | { | |
159 | struct cleanup *disable_chain; | |
160 | struct thread_info *tp; | |
161 | ||
162 | DEBUG ("open"); | |
163 | ||
8213266a | 164 | record_preopen (); |
afedecd3 MM |
165 | |
166 | if (!target_has_execution) | |
167 | error (_("The program is not being run.")); | |
168 | ||
169 | if (!target_supports_btrace ()) | |
170 | error (_("Target does not support branch tracing.")); | |
171 | ||
52834460 MM |
172 | if (non_stop) |
173 | error (_("Record btrace can't debug inferior in non-stop mode.")); | |
174 | ||
afedecd3 MM |
175 | gdb_assert (record_btrace_thread_observer == NULL); |
176 | ||
177 | disable_chain = make_cleanup (null_cleanup, NULL); | |
178 | ALL_THREADS (tp) | |
179 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->num)) | |
180 | { | |
181 | btrace_enable (tp); | |
182 | ||
183 | make_cleanup (record_btrace_disable_callback, tp); | |
184 | } | |
185 | ||
186 | record_btrace_auto_enable (); | |
187 | ||
188 | push_target (&record_btrace_ops); | |
189 | ||
190 | observer_notify_record_changed (current_inferior (), 1); | |
191 | ||
192 | discard_cleanups (disable_chain); | |
193 | } | |
194 | ||
195 | /* The to_stop_recording method of target record-btrace. */ | |
196 | ||
197 | static void | |
198 | record_btrace_stop_recording (void) | |
199 | { | |
200 | struct thread_info *tp; | |
201 | ||
202 | DEBUG ("stop recording"); | |
203 | ||
204 | record_btrace_auto_disable (); | |
205 | ||
206 | ALL_THREADS (tp) | |
207 | if (tp->btrace.target != NULL) | |
208 | btrace_disable (tp); | |
209 | } | |
210 | ||
211 | /* The to_close method of target record-btrace. */ | |
212 | ||
213 | static void | |
460014f5 | 214 | record_btrace_close (void) |
afedecd3 | 215 | { |
99c819ee MM |
216 | /* Make sure automatic recording gets disabled even if we did not stop |
217 | recording before closing the record-btrace target. */ | |
218 | record_btrace_auto_disable (); | |
219 | ||
afedecd3 MM |
220 | /* We already stopped recording. */ |
221 | } | |
222 | ||
223 | /* The to_info_record method of target record-btrace. */ | |
224 | ||
225 | static void | |
226 | record_btrace_info (void) | |
227 | { | |
228 | struct btrace_thread_info *btinfo; | |
229 | struct thread_info *tp; | |
23a7fe75 | 230 | unsigned int insns, calls; |
afedecd3 MM |
231 | |
232 | DEBUG ("info"); | |
233 | ||
234 | tp = find_thread_ptid (inferior_ptid); | |
235 | if (tp == NULL) | |
236 | error (_("No thread.")); | |
237 | ||
238 | btrace_fetch (tp); | |
239 | ||
23a7fe75 MM |
240 | insns = 0; |
241 | calls = 0; | |
242 | ||
afedecd3 | 243 | btinfo = &tp->btrace; |
6e07b1d2 MM |
244 | |
245 | if (!btrace_is_empty (tp)) | |
23a7fe75 MM |
246 | { |
247 | struct btrace_call_iterator call; | |
248 | struct btrace_insn_iterator insn; | |
249 | ||
250 | btrace_call_end (&call, btinfo); | |
251 | btrace_call_prev (&call, 1); | |
5de9129b | 252 | calls = btrace_call_number (&call); |
23a7fe75 MM |
253 | |
254 | btrace_insn_end (&insn, btinfo); | |
255 | btrace_insn_prev (&insn, 1); | |
5de9129b | 256 | insns = btrace_insn_number (&insn); |
23a7fe75 | 257 | } |
afedecd3 MM |
258 | |
259 | printf_unfiltered (_("Recorded %u instructions in %u functions for thread " | |
23a7fe75 | 260 | "%d (%s).\n"), insns, calls, tp->num, |
afedecd3 | 261 | target_pid_to_str (tp->ptid)); |
07bbe694 MM |
262 | |
263 | if (btrace_is_replaying (tp)) | |
264 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
265 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
266 | } |
267 | ||
268 | /* Print an unsigned int. */ | |
269 | ||
270 | static void | |
271 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
272 | { | |
273 | ui_out_field_fmt (uiout, fld, "%u", val); | |
274 | } | |
275 | ||
276 | /* Disassemble a section of the recorded instruction trace. */ | |
277 | ||
278 | static void | |
23a7fe75 MM |
279 | btrace_insn_history (struct ui_out *uiout, |
280 | const struct btrace_insn_iterator *begin, | |
281 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 MM |
282 | { |
283 | struct gdbarch *gdbarch; | |
23a7fe75 | 284 | struct btrace_insn_iterator it; |
afedecd3 | 285 | |
23a7fe75 MM |
286 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
287 | btrace_insn_number (end)); | |
afedecd3 MM |
288 | |
289 | gdbarch = target_gdbarch (); | |
290 | ||
23a7fe75 | 291 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 292 | { |
23a7fe75 MM |
293 | const struct btrace_insn *insn; |
294 | ||
295 | insn = btrace_insn_get (&it); | |
296 | ||
afedecd3 | 297 | /* Print the instruction index. */ |
23a7fe75 | 298 | ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); |
afedecd3 MM |
299 | ui_out_text (uiout, "\t"); |
300 | ||
301 | /* Disassembly with '/m' flag may not produce the expected result. | |
302 | See PR gdb/11833. */ | |
23a7fe75 | 303 | gdb_disassembly (gdbarch, uiout, NULL, flags, 1, insn->pc, insn->pc + 1); |
afedecd3 MM |
304 | } |
305 | } | |
306 | ||
307 | /* The to_insn_history method of target record-btrace. */ | |
308 | ||
309 | static void | |
310 | record_btrace_insn_history (int size, int flags) | |
311 | { | |
312 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
313 | struct btrace_insn_history *history; |
314 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
315 | struct cleanup *uiout_cleanup; |
316 | struct ui_out *uiout; | |
23a7fe75 | 317 | unsigned int context, covered; |
afedecd3 MM |
318 | |
319 | uiout = current_uiout; | |
320 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
321 | "insn history"); | |
afedecd3 | 322 | context = abs (size); |
afedecd3 MM |
323 | if (context == 0) |
324 | error (_("Bad record instruction-history-size.")); | |
325 | ||
23a7fe75 MM |
326 | btinfo = require_btrace (); |
327 | history = btinfo->insn_history; | |
328 | if (history == NULL) | |
afedecd3 | 329 | { |
07bbe694 | 330 | struct btrace_insn_iterator *replay; |
afedecd3 | 331 | |
23a7fe75 | 332 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 333 | |
07bbe694 MM |
334 | /* If we're replaying, we start at the replay position. Otherwise, we |
335 | start at the tail of the trace. */ | |
336 | replay = btinfo->replay; | |
337 | if (replay != NULL) | |
338 | begin = *replay; | |
339 | else | |
340 | btrace_insn_end (&begin, btinfo); | |
341 | ||
342 | /* We start from here and expand in the requested direction. Then we | |
343 | expand in the other direction, as well, to fill up any remaining | |
344 | context. */ | |
345 | end = begin; | |
346 | if (size < 0) | |
347 | { | |
348 | /* We want the current position covered, as well. */ | |
349 | covered = btrace_insn_next (&end, 1); | |
350 | covered += btrace_insn_prev (&begin, context - covered); | |
351 | covered += btrace_insn_next (&end, context - covered); | |
352 | } | |
353 | else | |
354 | { | |
355 | covered = btrace_insn_next (&end, context); | |
356 | covered += btrace_insn_prev (&begin, context - covered); | |
357 | } | |
afedecd3 MM |
358 | } |
359 | else | |
360 | { | |
23a7fe75 MM |
361 | begin = history->begin; |
362 | end = history->end; | |
afedecd3 | 363 | |
23a7fe75 MM |
364 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
365 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 366 | |
23a7fe75 MM |
367 | if (size < 0) |
368 | { | |
369 | end = begin; | |
370 | covered = btrace_insn_prev (&begin, context); | |
371 | } | |
372 | else | |
373 | { | |
374 | begin = end; | |
375 | covered = btrace_insn_next (&end, context); | |
376 | } | |
afedecd3 MM |
377 | } |
378 | ||
23a7fe75 MM |
379 | if (covered > 0) |
380 | btrace_insn_history (uiout, &begin, &end, flags); | |
381 | else | |
382 | { | |
383 | if (size < 0) | |
384 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
385 | else | |
386 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
387 | } | |
afedecd3 | 388 | |
23a7fe75 | 389 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
390 | do_cleanups (uiout_cleanup); |
391 | } | |
392 | ||
393 | /* The to_insn_history_range method of target record-btrace. */ | |
394 | ||
395 | static void | |
396 | record_btrace_insn_history_range (ULONGEST from, ULONGEST to, int flags) | |
397 | { | |
398 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
399 | struct btrace_insn_history *history; |
400 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
401 | struct cleanup *uiout_cleanup; |
402 | struct ui_out *uiout; | |
23a7fe75 MM |
403 | unsigned int low, high; |
404 | int found; | |
afedecd3 MM |
405 | |
406 | uiout = current_uiout; | |
407 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
408 | "insn history"); | |
23a7fe75 MM |
409 | low = from; |
410 | high = to; | |
afedecd3 | 411 | |
23a7fe75 | 412 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
413 | |
414 | /* Check for wrap-arounds. */ | |
23a7fe75 | 415 | if (low != from || high != to) |
afedecd3 MM |
416 | error (_("Bad range.")); |
417 | ||
0688d04e | 418 | if (high < low) |
afedecd3 MM |
419 | error (_("Bad range.")); |
420 | ||
23a7fe75 | 421 | btinfo = require_btrace (); |
afedecd3 | 422 | |
23a7fe75 MM |
423 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
424 | if (found == 0) | |
425 | error (_("Range out of bounds.")); | |
afedecd3 | 426 | |
23a7fe75 MM |
427 | found = btrace_find_insn_by_number (&end, btinfo, high); |
428 | if (found == 0) | |
0688d04e MM |
429 | { |
430 | /* Silently truncate the range. */ | |
431 | btrace_insn_end (&end, btinfo); | |
432 | } | |
433 | else | |
434 | { | |
435 | /* We want both begin and end to be inclusive. */ | |
436 | btrace_insn_next (&end, 1); | |
437 | } | |
afedecd3 | 438 | |
23a7fe75 MM |
439 | btrace_insn_history (uiout, &begin, &end, flags); |
440 | btrace_set_insn_history (btinfo, &begin, &end); | |
afedecd3 MM |
441 | |
442 | do_cleanups (uiout_cleanup); | |
443 | } | |
444 | ||
445 | /* The to_insn_history_from method of target record-btrace. */ | |
446 | ||
447 | static void | |
448 | record_btrace_insn_history_from (ULONGEST from, int size, int flags) | |
449 | { | |
450 | ULONGEST begin, end, context; | |
451 | ||
452 | context = abs (size); | |
0688d04e MM |
453 | if (context == 0) |
454 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
455 | |
456 | if (size < 0) | |
457 | { | |
458 | end = from; | |
459 | ||
460 | if (from < context) | |
461 | begin = 0; | |
462 | else | |
0688d04e | 463 | begin = from - context + 1; |
afedecd3 MM |
464 | } |
465 | else | |
466 | { | |
467 | begin = from; | |
0688d04e | 468 | end = from + context - 1; |
afedecd3 MM |
469 | |
470 | /* Check for wrap-around. */ | |
471 | if (end < begin) | |
472 | end = ULONGEST_MAX; | |
473 | } | |
474 | ||
475 | record_btrace_insn_history_range (begin, end, flags); | |
476 | } | |
477 | ||
478 | /* Print the instruction number range for a function call history line. */ | |
479 | ||
480 | static void | |
23a7fe75 MM |
481 | btrace_call_history_insn_range (struct ui_out *uiout, |
482 | const struct btrace_function *bfun) | |
afedecd3 | 483 | { |
7acbe133 MM |
484 | unsigned int begin, end, size; |
485 | ||
486 | size = VEC_length (btrace_insn_s, bfun->insn); | |
487 | gdb_assert (size > 0); | |
afedecd3 | 488 | |
23a7fe75 | 489 | begin = bfun->insn_offset; |
7acbe133 | 490 | end = begin + size - 1; |
afedecd3 | 491 | |
23a7fe75 | 492 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 493 | ui_out_text (uiout, ","); |
23a7fe75 | 494 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
495 | } |
496 | ||
497 | /* Print the source line information for a function call history line. */ | |
498 | ||
499 | static void | |
23a7fe75 MM |
500 | btrace_call_history_src_line (struct ui_out *uiout, |
501 | const struct btrace_function *bfun) | |
afedecd3 MM |
502 | { |
503 | struct symbol *sym; | |
23a7fe75 | 504 | int begin, end; |
afedecd3 MM |
505 | |
506 | sym = bfun->sym; | |
507 | if (sym == NULL) | |
508 | return; | |
509 | ||
510 | ui_out_field_string (uiout, "file", | |
511 | symtab_to_filename_for_display (sym->symtab)); | |
512 | ||
23a7fe75 MM |
513 | begin = bfun->lbegin; |
514 | end = bfun->lend; | |
515 | ||
516 | if (end < begin) | |
afedecd3 MM |
517 | return; |
518 | ||
519 | ui_out_text (uiout, ":"); | |
23a7fe75 | 520 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 521 | |
23a7fe75 | 522 | if (end == begin) |
afedecd3 MM |
523 | return; |
524 | ||
8710b709 | 525 | ui_out_text (uiout, ","); |
23a7fe75 | 526 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
527 | } |
528 | ||
0b722aec MM |
529 | /* Get the name of a branch trace function. */ |
530 | ||
531 | static const char * | |
532 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
533 | { | |
534 | struct minimal_symbol *msym; | |
535 | struct symbol *sym; | |
536 | ||
537 | if (bfun == NULL) | |
538 | return "??"; | |
539 | ||
540 | msym = bfun->msym; | |
541 | sym = bfun->sym; | |
542 | ||
543 | if (sym != NULL) | |
544 | return SYMBOL_PRINT_NAME (sym); | |
545 | else if (msym != NULL) | |
546 | return SYMBOL_PRINT_NAME (msym); | |
547 | else | |
548 | return "??"; | |
549 | } | |
550 | ||
afedecd3 MM |
551 | /* Disassemble a section of the recorded function trace. */ |
552 | ||
553 | static void | |
23a7fe75 | 554 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 555 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
556 | const struct btrace_call_iterator *begin, |
557 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
558 | enum record_print_flag flags) |
559 | { | |
23a7fe75 | 560 | struct btrace_call_iterator it; |
afedecd3 | 561 | |
23a7fe75 MM |
562 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
563 | btrace_call_number (end)); | |
afedecd3 | 564 | |
23a7fe75 | 565 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 566 | { |
23a7fe75 MM |
567 | const struct btrace_function *bfun; |
568 | struct minimal_symbol *msym; | |
569 | struct symbol *sym; | |
570 | ||
571 | bfun = btrace_call_get (&it); | |
23a7fe75 | 572 | sym = bfun->sym; |
0b722aec | 573 | msym = bfun->msym; |
23a7fe75 | 574 | |
afedecd3 | 575 | /* Print the function index. */ |
23a7fe75 | 576 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
577 | ui_out_text (uiout, "\t"); |
578 | ||
8710b709 MM |
579 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
580 | { | |
581 | int level = bfun->level + btinfo->level, i; | |
582 | ||
583 | for (i = 0; i < level; ++i) | |
584 | ui_out_text (uiout, " "); | |
585 | } | |
586 | ||
587 | if (sym != NULL) | |
588 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
589 | else if (msym != NULL) | |
590 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (msym)); | |
591 | else if (!ui_out_is_mi_like_p (uiout)) | |
592 | ui_out_field_string (uiout, "function", "??"); | |
593 | ||
1e038f67 | 594 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 595 | { |
8710b709 | 596 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 597 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
598 | } |
599 | ||
1e038f67 | 600 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 601 | { |
8710b709 | 602 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 603 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
604 | } |
605 | ||
afedecd3 MM |
606 | ui_out_text (uiout, "\n"); |
607 | } | |
608 | } | |
609 | ||
610 | /* The to_call_history method of target record-btrace. */ | |
611 | ||
612 | static void | |
613 | record_btrace_call_history (int size, int flags) | |
614 | { | |
615 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
616 | struct btrace_call_history *history; |
617 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
618 | struct cleanup *uiout_cleanup; |
619 | struct ui_out *uiout; | |
23a7fe75 | 620 | unsigned int context, covered; |
afedecd3 MM |
621 | |
622 | uiout = current_uiout; | |
623 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
624 | "insn history"); | |
afedecd3 | 625 | context = abs (size); |
afedecd3 MM |
626 | if (context == 0) |
627 | error (_("Bad record function-call-history-size.")); | |
628 | ||
23a7fe75 MM |
629 | btinfo = require_btrace (); |
630 | history = btinfo->call_history; | |
631 | if (history == NULL) | |
afedecd3 | 632 | { |
07bbe694 | 633 | struct btrace_insn_iterator *replay; |
afedecd3 | 634 | |
23a7fe75 | 635 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 636 | |
07bbe694 MM |
637 | /* If we're replaying, we start at the replay position. Otherwise, we |
638 | start at the tail of the trace. */ | |
639 | replay = btinfo->replay; | |
640 | if (replay != NULL) | |
641 | { | |
642 | begin.function = replay->function; | |
643 | begin.btinfo = btinfo; | |
644 | } | |
645 | else | |
646 | btrace_call_end (&begin, btinfo); | |
647 | ||
648 | /* We start from here and expand in the requested direction. Then we | |
649 | expand in the other direction, as well, to fill up any remaining | |
650 | context. */ | |
651 | end = begin; | |
652 | if (size < 0) | |
653 | { | |
654 | /* We want the current position covered, as well. */ | |
655 | covered = btrace_call_next (&end, 1); | |
656 | covered += btrace_call_prev (&begin, context - covered); | |
657 | covered += btrace_call_next (&end, context - covered); | |
658 | } | |
659 | else | |
660 | { | |
661 | covered = btrace_call_next (&end, context); | |
662 | covered += btrace_call_prev (&begin, context- covered); | |
663 | } | |
afedecd3 MM |
664 | } |
665 | else | |
666 | { | |
23a7fe75 MM |
667 | begin = history->begin; |
668 | end = history->end; | |
afedecd3 | 669 | |
23a7fe75 MM |
670 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
671 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 672 | |
23a7fe75 MM |
673 | if (size < 0) |
674 | { | |
675 | end = begin; | |
676 | covered = btrace_call_prev (&begin, context); | |
677 | } | |
678 | else | |
679 | { | |
680 | begin = end; | |
681 | covered = btrace_call_next (&end, context); | |
682 | } | |
afedecd3 MM |
683 | } |
684 | ||
23a7fe75 | 685 | if (covered > 0) |
8710b709 | 686 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
687 | else |
688 | { | |
689 | if (size < 0) | |
690 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
691 | else | |
692 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
693 | } | |
afedecd3 | 694 | |
23a7fe75 | 695 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
696 | do_cleanups (uiout_cleanup); |
697 | } | |
698 | ||
699 | /* The to_call_history_range method of target record-btrace. */ | |
700 | ||
701 | static void | |
702 | record_btrace_call_history_range (ULONGEST from, ULONGEST to, int flags) | |
703 | { | |
704 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
705 | struct btrace_call_history *history; |
706 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
707 | struct cleanup *uiout_cleanup; |
708 | struct ui_out *uiout; | |
23a7fe75 MM |
709 | unsigned int low, high; |
710 | int found; | |
afedecd3 MM |
711 | |
712 | uiout = current_uiout; | |
713 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
714 | "func history"); | |
23a7fe75 MM |
715 | low = from; |
716 | high = to; | |
afedecd3 | 717 | |
23a7fe75 | 718 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
719 | |
720 | /* Check for wrap-arounds. */ | |
23a7fe75 | 721 | if (low != from || high != to) |
afedecd3 MM |
722 | error (_("Bad range.")); |
723 | ||
0688d04e | 724 | if (high < low) |
afedecd3 MM |
725 | error (_("Bad range.")); |
726 | ||
23a7fe75 | 727 | btinfo = require_btrace (); |
afedecd3 | 728 | |
23a7fe75 MM |
729 | found = btrace_find_call_by_number (&begin, btinfo, low); |
730 | if (found == 0) | |
731 | error (_("Range out of bounds.")); | |
afedecd3 | 732 | |
23a7fe75 MM |
733 | found = btrace_find_call_by_number (&end, btinfo, high); |
734 | if (found == 0) | |
0688d04e MM |
735 | { |
736 | /* Silently truncate the range. */ | |
737 | btrace_call_end (&end, btinfo); | |
738 | } | |
739 | else | |
740 | { | |
741 | /* We want both begin and end to be inclusive. */ | |
742 | btrace_call_next (&end, 1); | |
743 | } | |
afedecd3 | 744 | |
8710b709 | 745 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 746 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
747 | |
748 | do_cleanups (uiout_cleanup); | |
749 | } | |
750 | ||
751 | /* The to_call_history_from method of target record-btrace. */ | |
752 | ||
753 | static void | |
754 | record_btrace_call_history_from (ULONGEST from, int size, int flags) | |
755 | { | |
756 | ULONGEST begin, end, context; | |
757 | ||
758 | context = abs (size); | |
0688d04e MM |
759 | if (context == 0) |
760 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
761 | |
762 | if (size < 0) | |
763 | { | |
764 | end = from; | |
765 | ||
766 | if (from < context) | |
767 | begin = 0; | |
768 | else | |
0688d04e | 769 | begin = from - context + 1; |
afedecd3 MM |
770 | } |
771 | else | |
772 | { | |
773 | begin = from; | |
0688d04e | 774 | end = from + context - 1; |
afedecd3 MM |
775 | |
776 | /* Check for wrap-around. */ | |
777 | if (end < begin) | |
778 | end = ULONGEST_MAX; | |
779 | } | |
780 | ||
781 | record_btrace_call_history_range (begin, end, flags); | |
782 | } | |
783 | ||
07bbe694 MM |
784 | /* The to_record_is_replaying method of target record-btrace. */ |
785 | ||
786 | static int | |
787 | record_btrace_is_replaying (void) | |
788 | { | |
789 | struct thread_info *tp; | |
790 | ||
791 | ALL_THREADS (tp) | |
792 | if (btrace_is_replaying (tp)) | |
793 | return 1; | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
633785ff MM |
798 | /* The to_xfer_partial method of target record-btrace. */ |
799 | ||
800 | static LONGEST | |
801 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, | |
802 | const char *annex, gdb_byte *readbuf, | |
803 | const gdb_byte *writebuf, ULONGEST offset, | |
804 | ULONGEST len) | |
805 | { | |
806 | struct target_ops *t; | |
807 | ||
808 | /* Filter out requests that don't make sense during replay. */ | |
809 | if (!record_btrace_allow_memory_access && record_btrace_is_replaying ()) | |
810 | { | |
811 | switch (object) | |
812 | { | |
813 | case TARGET_OBJECT_MEMORY: | |
814 | { | |
815 | struct target_section *section; | |
816 | ||
817 | /* We do not allow writing memory in general. */ | |
818 | if (writebuf != NULL) | |
819 | return TARGET_XFER_E_UNAVAILABLE; | |
820 | ||
821 | /* We allow reading readonly memory. */ | |
822 | section = target_section_by_addr (ops, offset); | |
823 | if (section != NULL) | |
824 | { | |
825 | /* Check if the section we found is readonly. */ | |
826 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
827 | section->the_bfd_section) | |
828 | & SEC_READONLY) != 0) | |
829 | { | |
830 | /* Truncate the request to fit into this section. */ | |
831 | len = min (len, section->endaddr - offset); | |
832 | break; | |
833 | } | |
834 | } | |
835 | ||
836 | return TARGET_XFER_E_UNAVAILABLE; | |
837 | } | |
838 | } | |
839 | } | |
840 | ||
841 | /* Forward the request. */ | |
842 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
843 | if (ops->to_xfer_partial != NULL) | |
844 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
845 | offset, len); | |
846 | ||
847 | return TARGET_XFER_E_UNAVAILABLE; | |
848 | } | |
849 | ||
850 | /* The to_insert_breakpoint method of target record-btrace. */ | |
851 | ||
852 | static int | |
853 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
854 | struct gdbarch *gdbarch, | |
855 | struct bp_target_info *bp_tgt) | |
856 | { | |
857 | volatile struct gdb_exception except; | |
858 | int old, ret; | |
859 | ||
860 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
861 | duration of this function. */ | |
862 | old = record_btrace_allow_memory_access; | |
863 | record_btrace_allow_memory_access = 1; | |
864 | ||
865 | ret = 0; | |
866 | TRY_CATCH (except, RETURN_MASK_ALL) | |
867 | ret = forward_target_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
868 | ||
869 | record_btrace_allow_memory_access = old; | |
870 | ||
871 | if (except.reason < 0) | |
872 | throw_exception (except); | |
873 | ||
874 | return ret; | |
875 | } | |
876 | ||
877 | /* The to_remove_breakpoint method of target record-btrace. */ | |
878 | ||
879 | static int | |
880 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
881 | struct gdbarch *gdbarch, | |
882 | struct bp_target_info *bp_tgt) | |
883 | { | |
884 | volatile struct gdb_exception except; | |
885 | int old, ret; | |
886 | ||
887 | /* Removing breakpoints requires accessing memory. Allow it for the | |
888 | duration of this function. */ | |
889 | old = record_btrace_allow_memory_access; | |
890 | record_btrace_allow_memory_access = 1; | |
891 | ||
892 | ret = 0; | |
893 | TRY_CATCH (except, RETURN_MASK_ALL) | |
894 | ret = forward_target_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); | |
895 | ||
896 | record_btrace_allow_memory_access = old; | |
897 | ||
898 | if (except.reason < 0) | |
899 | throw_exception (except); | |
900 | ||
901 | return ret; | |
902 | } | |
903 | ||
1f3ef581 MM |
904 | /* The to_fetch_registers method of target record-btrace. */ |
905 | ||
906 | static void | |
907 | record_btrace_fetch_registers (struct target_ops *ops, | |
908 | struct regcache *regcache, int regno) | |
909 | { | |
910 | struct btrace_insn_iterator *replay; | |
911 | struct thread_info *tp; | |
912 | ||
913 | tp = find_thread_ptid (inferior_ptid); | |
914 | gdb_assert (tp != NULL); | |
915 | ||
916 | replay = tp->btrace.replay; | |
917 | if (replay != NULL) | |
918 | { | |
919 | const struct btrace_insn *insn; | |
920 | struct gdbarch *gdbarch; | |
921 | int pcreg; | |
922 | ||
923 | gdbarch = get_regcache_arch (regcache); | |
924 | pcreg = gdbarch_pc_regnum (gdbarch); | |
925 | if (pcreg < 0) | |
926 | return; | |
927 | ||
928 | /* We can only provide the PC register. */ | |
929 | if (regno >= 0 && regno != pcreg) | |
930 | return; | |
931 | ||
932 | insn = btrace_insn_get (replay); | |
933 | gdb_assert (insn != NULL); | |
934 | ||
935 | regcache_raw_supply (regcache, regno, &insn->pc); | |
936 | } | |
937 | else | |
938 | { | |
939 | struct target_ops *t; | |
940 | ||
941 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
942 | if (t->to_fetch_registers != NULL) | |
943 | { | |
944 | t->to_fetch_registers (t, regcache, regno); | |
945 | break; | |
946 | } | |
947 | } | |
948 | } | |
949 | ||
950 | /* The to_store_registers method of target record-btrace. */ | |
951 | ||
952 | static void | |
953 | record_btrace_store_registers (struct target_ops *ops, | |
954 | struct regcache *regcache, int regno) | |
955 | { | |
956 | struct target_ops *t; | |
957 | ||
958 | if (record_btrace_is_replaying ()) | |
959 | error (_("This record target does not allow writing registers.")); | |
960 | ||
961 | gdb_assert (may_write_registers != 0); | |
962 | ||
963 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
964 | if (t->to_store_registers != NULL) | |
965 | { | |
966 | t->to_store_registers (t, regcache, regno); | |
967 | return; | |
968 | } | |
969 | ||
970 | noprocess (); | |
971 | } | |
972 | ||
973 | /* The to_prepare_to_store method of target record-btrace. */ | |
974 | ||
975 | static void | |
976 | record_btrace_prepare_to_store (struct target_ops *ops, | |
977 | struct regcache *regcache) | |
978 | { | |
979 | struct target_ops *t; | |
980 | ||
981 | if (record_btrace_is_replaying ()) | |
982 | return; | |
983 | ||
984 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
985 | if (t->to_prepare_to_store != NULL) | |
986 | { | |
987 | t->to_prepare_to_store (t, regcache); | |
988 | return; | |
989 | } | |
990 | } | |
991 | ||
0b722aec MM |
992 | /* The branch trace frame cache. */ |
993 | ||
994 | struct btrace_frame_cache | |
995 | { | |
996 | /* The thread. */ | |
997 | struct thread_info *tp; | |
998 | ||
999 | /* The frame info. */ | |
1000 | struct frame_info *frame; | |
1001 | ||
1002 | /* The branch trace function segment. */ | |
1003 | const struct btrace_function *bfun; | |
1004 | }; | |
1005 | ||
1006 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1007 | ||
1008 | static htab_t bfcache; | |
1009 | ||
1010 | /* hash_f for htab_create_alloc of bfcache. */ | |
1011 | ||
1012 | static hashval_t | |
1013 | bfcache_hash (const void *arg) | |
1014 | { | |
1015 | const struct btrace_frame_cache *cache = arg; | |
1016 | ||
1017 | return htab_hash_pointer (cache->frame); | |
1018 | } | |
1019 | ||
1020 | /* eq_f for htab_create_alloc of bfcache. */ | |
1021 | ||
1022 | static int | |
1023 | bfcache_eq (const void *arg1, const void *arg2) | |
1024 | { | |
1025 | const struct btrace_frame_cache *cache1 = arg1; | |
1026 | const struct btrace_frame_cache *cache2 = arg2; | |
1027 | ||
1028 | return cache1->frame == cache2->frame; | |
1029 | } | |
1030 | ||
1031 | /* Create a new btrace frame cache. */ | |
1032 | ||
1033 | static struct btrace_frame_cache * | |
1034 | bfcache_new (struct frame_info *frame) | |
1035 | { | |
1036 | struct btrace_frame_cache *cache; | |
1037 | void **slot; | |
1038 | ||
1039 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1040 | cache->frame = frame; | |
1041 | ||
1042 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1043 | gdb_assert (*slot == NULL); | |
1044 | *slot = cache; | |
1045 | ||
1046 | return cache; | |
1047 | } | |
1048 | ||
1049 | /* Extract the branch trace function from a branch trace frame. */ | |
1050 | ||
1051 | static const struct btrace_function * | |
1052 | btrace_get_frame_function (struct frame_info *frame) | |
1053 | { | |
1054 | const struct btrace_frame_cache *cache; | |
1055 | const struct btrace_function *bfun; | |
1056 | struct btrace_frame_cache pattern; | |
1057 | void **slot; | |
1058 | ||
1059 | pattern.frame = frame; | |
1060 | ||
1061 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1062 | if (slot == NULL) | |
1063 | return NULL; | |
1064 | ||
1065 | cache = *slot; | |
1066 | return cache->bfun; | |
1067 | } | |
1068 | ||
cecac1ab MM |
1069 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1070 | ||
1071 | static enum unwind_stop_reason | |
1072 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1073 | void **this_cache) | |
1074 | { | |
0b722aec MM |
1075 | const struct btrace_frame_cache *cache; |
1076 | const struct btrace_function *bfun; | |
1077 | ||
1078 | cache = *this_cache; | |
1079 | bfun = cache->bfun; | |
1080 | gdb_assert (bfun != NULL); | |
1081 | ||
1082 | if (bfun->up == NULL) | |
1083 | return UNWIND_UNAVAILABLE; | |
1084 | ||
1085 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1086 | } |
1087 | ||
1088 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1089 | ||
1090 | static void | |
1091 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1092 | struct frame_id *this_id) | |
1093 | { | |
0b722aec MM |
1094 | const struct btrace_frame_cache *cache; |
1095 | const struct btrace_function *bfun; | |
1096 | CORE_ADDR code, special; | |
1097 | ||
1098 | cache = *this_cache; | |
1099 | ||
1100 | bfun = cache->bfun; | |
1101 | gdb_assert (bfun != NULL); | |
1102 | ||
1103 | while (bfun->segment.prev != NULL) | |
1104 | bfun = bfun->segment.prev; | |
1105 | ||
1106 | code = get_frame_func (this_frame); | |
1107 | special = bfun->number; | |
1108 | ||
1109 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1110 | ||
1111 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1112 | btrace_get_bfun_name (cache->bfun), | |
1113 | core_addr_to_string_nz (this_id->code_addr), | |
1114 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1115 | } |
1116 | ||
1117 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1118 | ||
1119 | static struct value * | |
1120 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1121 | void **this_cache, | |
1122 | int regnum) | |
1123 | { | |
0b722aec MM |
1124 | const struct btrace_frame_cache *cache; |
1125 | const struct btrace_function *bfun, *caller; | |
1126 | const struct btrace_insn *insn; | |
1127 | struct gdbarch *gdbarch; | |
1128 | CORE_ADDR pc; | |
1129 | int pcreg; | |
1130 | ||
1131 | gdbarch = get_frame_arch (this_frame); | |
1132 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1133 | if (pcreg < 0 || regnum != pcreg) | |
1134 | throw_error (NOT_AVAILABLE_ERROR, | |
1135 | _("Registers are not available in btrace record history")); | |
1136 | ||
1137 | cache = *this_cache; | |
1138 | bfun = cache->bfun; | |
1139 | gdb_assert (bfun != NULL); | |
1140 | ||
1141 | caller = bfun->up; | |
1142 | if (caller == NULL) | |
1143 | throw_error (NOT_AVAILABLE_ERROR, | |
1144 | _("No caller in btrace record history")); | |
1145 | ||
1146 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1147 | { | |
1148 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1149 | pc = insn->pc; | |
1150 | } | |
1151 | else | |
1152 | { | |
1153 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1154 | pc = insn->pc; | |
1155 | ||
1156 | pc += gdb_insn_length (gdbarch, pc); | |
1157 | } | |
1158 | ||
1159 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1160 | btrace_get_bfun_name (bfun), bfun->level, | |
1161 | core_addr_to_string_nz (pc)); | |
1162 | ||
1163 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1164 | } |
1165 | ||
1166 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1167 | ||
1168 | static int | |
1169 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1170 | struct frame_info *this_frame, | |
1171 | void **this_cache) | |
1172 | { | |
0b722aec MM |
1173 | const struct btrace_function *bfun; |
1174 | struct btrace_frame_cache *cache; | |
cecac1ab | 1175 | struct thread_info *tp; |
0b722aec | 1176 | struct frame_info *next; |
cecac1ab MM |
1177 | |
1178 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1179 | tp = find_thread_ptid (inferior_ptid); | |
1180 | gdb_assert (tp != NULL); | |
1181 | ||
0b722aec MM |
1182 | bfun = NULL; |
1183 | next = get_next_frame (this_frame); | |
1184 | if (next == NULL) | |
1185 | { | |
1186 | const struct btrace_insn_iterator *replay; | |
1187 | ||
1188 | replay = tp->btrace.replay; | |
1189 | if (replay != NULL) | |
1190 | bfun = replay->function; | |
1191 | } | |
1192 | else | |
1193 | { | |
1194 | const struct btrace_function *callee; | |
1195 | ||
1196 | callee = btrace_get_frame_function (next); | |
1197 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1198 | bfun = callee->up; | |
1199 | } | |
1200 | ||
1201 | if (bfun == NULL) | |
1202 | return 0; | |
1203 | ||
1204 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1205 | btrace_get_bfun_name (bfun), bfun->level); | |
1206 | ||
1207 | /* This is our frame. Initialize the frame cache. */ | |
1208 | cache = bfcache_new (this_frame); | |
1209 | cache->tp = tp; | |
1210 | cache->bfun = bfun; | |
1211 | ||
1212 | *this_cache = cache; | |
1213 | return 1; | |
1214 | } | |
1215 | ||
1216 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1217 | ||
1218 | static int | |
1219 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1220 | struct frame_info *this_frame, | |
1221 | void **this_cache) | |
1222 | { | |
1223 | const struct btrace_function *bfun, *callee; | |
1224 | struct btrace_frame_cache *cache; | |
1225 | struct frame_info *next; | |
1226 | ||
1227 | next = get_next_frame (this_frame); | |
1228 | if (next == NULL) | |
1229 | return 0; | |
1230 | ||
1231 | callee = btrace_get_frame_function (next); | |
1232 | if (callee == NULL) | |
1233 | return 0; | |
1234 | ||
1235 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1236 | return 0; | |
1237 | ||
1238 | bfun = callee->up; | |
1239 | if (bfun == NULL) | |
1240 | return 0; | |
1241 | ||
1242 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1243 | btrace_get_bfun_name (bfun), bfun->level); | |
1244 | ||
1245 | /* This is our frame. Initialize the frame cache. */ | |
1246 | cache = bfcache_new (this_frame); | |
1247 | cache->tp = find_thread_ptid (inferior_ptid); | |
1248 | cache->bfun = bfun; | |
1249 | ||
1250 | *this_cache = cache; | |
1251 | return 1; | |
1252 | } | |
1253 | ||
1254 | static void | |
1255 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1256 | { | |
1257 | struct btrace_frame_cache *cache; | |
1258 | void **slot; | |
1259 | ||
1260 | cache = this_cache; | |
1261 | ||
1262 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1263 | gdb_assert (slot != NULL); | |
1264 | ||
1265 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1266 | } |
1267 | ||
1268 | /* btrace recording does not store previous memory content, neither the stack | |
1269 | frames content. Any unwinding would return errorneous results as the stack | |
1270 | contents no longer matches the changed PC value restored from history. | |
1271 | Therefore this unwinder reports any possibly unwound registers as | |
1272 | <unavailable>. */ | |
1273 | ||
0b722aec | 1274 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1275 | { |
1276 | NORMAL_FRAME, | |
1277 | record_btrace_frame_unwind_stop_reason, | |
1278 | record_btrace_frame_this_id, | |
1279 | record_btrace_frame_prev_register, | |
1280 | NULL, | |
0b722aec MM |
1281 | record_btrace_frame_sniffer, |
1282 | record_btrace_frame_dealloc_cache | |
1283 | }; | |
1284 | ||
1285 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1286 | { | |
1287 | TAILCALL_FRAME, | |
1288 | record_btrace_frame_unwind_stop_reason, | |
1289 | record_btrace_frame_this_id, | |
1290 | record_btrace_frame_prev_register, | |
1291 | NULL, | |
1292 | record_btrace_tailcall_frame_sniffer, | |
1293 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1294 | }; |
b2f4cfde | 1295 | |
52834460 MM |
1296 | /* Indicate that TP should be resumed according to FLAG. */ |
1297 | ||
1298 | static void | |
1299 | record_btrace_resume_thread (struct thread_info *tp, | |
1300 | enum btrace_thread_flag flag) | |
1301 | { | |
1302 | struct btrace_thread_info *btinfo; | |
1303 | ||
1304 | DEBUG ("resuming %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flag); | |
1305 | ||
1306 | btinfo = &tp->btrace; | |
1307 | ||
1308 | if ((btinfo->flags & BTHR_MOVE) != 0) | |
1309 | error (_("Thread already moving.")); | |
1310 | ||
1311 | /* Fetch the latest branch trace. */ | |
1312 | btrace_fetch (tp); | |
1313 | ||
1314 | btinfo->flags |= flag; | |
1315 | } | |
1316 | ||
1317 | /* Find the thread to resume given a PTID. */ | |
1318 | ||
1319 | static struct thread_info * | |
1320 | record_btrace_find_resume_thread (ptid_t ptid) | |
1321 | { | |
1322 | struct thread_info *tp; | |
1323 | ||
1324 | /* When asked to resume everything, we pick the current thread. */ | |
1325 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1326 | ptid = inferior_ptid; | |
1327 | ||
1328 | return find_thread_ptid (ptid); | |
1329 | } | |
1330 | ||
1331 | /* Start replaying a thread. */ | |
1332 | ||
1333 | static struct btrace_insn_iterator * | |
1334 | record_btrace_start_replaying (struct thread_info *tp) | |
1335 | { | |
1336 | volatile struct gdb_exception except; | |
1337 | struct btrace_insn_iterator *replay; | |
1338 | struct btrace_thread_info *btinfo; | |
1339 | int executing; | |
1340 | ||
1341 | btinfo = &tp->btrace; | |
1342 | replay = NULL; | |
1343 | ||
1344 | /* We can't start replaying without trace. */ | |
1345 | if (btinfo->begin == NULL) | |
1346 | return NULL; | |
1347 | ||
1348 | /* Clear the executing flag to allow changes to the current frame. | |
1349 | We are not actually running, yet. We just started a reverse execution | |
1350 | command or a record goto command. | |
1351 | For the latter, EXECUTING is false and this has no effect. | |
1352 | For the former, EXECUTING is true and we're in to_wait, about to | |
1353 | move the thread. Since we need to recompute the stack, we temporarily | |
1354 | set EXECUTING to flase. */ | |
1355 | executing = is_executing (tp->ptid); | |
1356 | set_executing (tp->ptid, 0); | |
1357 | ||
1358 | /* GDB stores the current frame_id when stepping in order to detects steps | |
1359 | into subroutines. | |
1360 | Since frames are computed differently when we're replaying, we need to | |
1361 | recompute those stored frames and fix them up so we can still detect | |
1362 | subroutines after we started replaying. */ | |
1363 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1364 | { | |
1365 | struct frame_info *frame; | |
1366 | struct frame_id frame_id; | |
1367 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1368 | ||
1369 | /* The current frame without replaying - computed via normal unwind. */ | |
1370 | frame = get_current_frame (); | |
1371 | frame_id = get_frame_id (frame); | |
1372 | ||
1373 | /* Check if we need to update any stepping-related frame id's. */ | |
1374 | upd_step_frame_id = frame_id_eq (frame_id, | |
1375 | tp->control.step_frame_id); | |
1376 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1377 | tp->control.step_stack_frame_id); | |
1378 | ||
1379 | /* We start replaying at the end of the branch trace. This corresponds | |
1380 | to the current instruction. */ | |
1381 | replay = xmalloc (sizeof (*replay)); | |
1382 | btrace_insn_end (replay, btinfo); | |
1383 | ||
1384 | /* We're not replaying, yet. */ | |
1385 | gdb_assert (btinfo->replay == NULL); | |
1386 | btinfo->replay = replay; | |
1387 | ||
1388 | /* Make sure we're not using any stale registers. */ | |
1389 | registers_changed_ptid (tp->ptid); | |
1390 | ||
1391 | /* The current frame with replaying - computed via btrace unwind. */ | |
1392 | frame = get_current_frame (); | |
1393 | frame_id = get_frame_id (frame); | |
1394 | ||
1395 | /* Replace stepping related frames where necessary. */ | |
1396 | if (upd_step_frame_id) | |
1397 | tp->control.step_frame_id = frame_id; | |
1398 | if (upd_step_stack_frame_id) | |
1399 | tp->control.step_stack_frame_id = frame_id; | |
1400 | } | |
1401 | ||
1402 | /* Restore the previous execution state. */ | |
1403 | set_executing (tp->ptid, executing); | |
1404 | ||
1405 | if (except.reason < 0) | |
1406 | { | |
1407 | xfree (btinfo->replay); | |
1408 | btinfo->replay = NULL; | |
1409 | ||
1410 | registers_changed_ptid (tp->ptid); | |
1411 | ||
1412 | throw_exception (except); | |
1413 | } | |
1414 | ||
1415 | return replay; | |
1416 | } | |
1417 | ||
1418 | /* Stop replaying a thread. */ | |
1419 | ||
1420 | static void | |
1421 | record_btrace_stop_replaying (struct thread_info *tp) | |
1422 | { | |
1423 | struct btrace_thread_info *btinfo; | |
1424 | ||
1425 | btinfo = &tp->btrace; | |
1426 | ||
1427 | xfree (btinfo->replay); | |
1428 | btinfo->replay = NULL; | |
1429 | ||
1430 | /* Make sure we're not leaving any stale registers. */ | |
1431 | registers_changed_ptid (tp->ptid); | |
1432 | } | |
1433 | ||
b2f4cfde MM |
1434 | /* The to_resume method of target record-btrace. */ |
1435 | ||
1436 | static void | |
1437 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1438 | enum gdb_signal signal) | |
1439 | { | |
52834460 MM |
1440 | struct thread_info *tp, *other; |
1441 | enum btrace_thread_flag flag; | |
1442 | ||
1443 | DEBUG ("resume %s: %s", target_pid_to_str (ptid), step ? "step" : "cont"); | |
1444 | ||
1445 | tp = record_btrace_find_resume_thread (ptid); | |
1446 | if (tp == NULL) | |
1447 | error (_("Cannot find thread to resume.")); | |
1448 | ||
1449 | /* Stop replaying other threads if the thread to resume is not replaying. */ | |
1450 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
1451 | ALL_THREADS (other) | |
1452 | record_btrace_stop_replaying (other); | |
1453 | ||
b2f4cfde | 1454 | /* As long as we're not replaying, just forward the request. */ |
52834460 | 1455 | if (!record_btrace_is_replaying () && execution_direction != EXEC_REVERSE) |
b2f4cfde MM |
1456 | { |
1457 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1458 | if (ops->to_resume != NULL) | |
1459 | return ops->to_resume (ops, ptid, step, signal); | |
1460 | ||
1461 | error (_("Cannot find target for stepping.")); | |
1462 | } | |
1463 | ||
52834460 MM |
1464 | /* Compute the btrace thread flag for the requested move. */ |
1465 | if (step == 0) | |
1466 | flag = execution_direction == EXEC_REVERSE ? BTHR_RCONT : BTHR_CONT; | |
1467 | else | |
1468 | flag = execution_direction == EXEC_REVERSE ? BTHR_RSTEP : BTHR_STEP; | |
1469 | ||
1470 | /* At the moment, we only move a single thread. We could also move | |
1471 | all threads in parallel by single-stepping each resumed thread | |
1472 | until the first runs into an event. | |
1473 | When we do that, we would want to continue all other threads. | |
1474 | For now, just resume one thread to not confuse to_wait. */ | |
1475 | record_btrace_resume_thread (tp, flag); | |
1476 | ||
1477 | /* We just indicate the resume intent here. The actual stepping happens in | |
1478 | record_btrace_wait below. */ | |
1479 | } | |
1480 | ||
1481 | /* Find a thread to move. */ | |
1482 | ||
1483 | static struct thread_info * | |
1484 | record_btrace_find_thread_to_move (ptid_t ptid) | |
1485 | { | |
1486 | struct thread_info *tp; | |
1487 | ||
1488 | /* First check the parameter thread. */ | |
1489 | tp = find_thread_ptid (ptid); | |
1490 | if (tp != NULL && (tp->btrace.flags & BTHR_MOVE) != 0) | |
1491 | return tp; | |
1492 | ||
1493 | /* Otherwise, find one other thread that has been resumed. */ | |
1494 | ALL_THREADS (tp) | |
1495 | if ((tp->btrace.flags & BTHR_MOVE) != 0) | |
1496 | return tp; | |
1497 | ||
1498 | return NULL; | |
1499 | } | |
1500 | ||
1501 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1502 | ||
1503 | static struct target_waitstatus | |
1504 | btrace_step_no_history (void) | |
1505 | { | |
1506 | struct target_waitstatus status; | |
1507 | ||
1508 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1509 | ||
1510 | return status; | |
1511 | } | |
1512 | ||
1513 | /* Return a target_waitstatus indicating that a step finished. */ | |
1514 | ||
1515 | static struct target_waitstatus | |
1516 | btrace_step_stopped (void) | |
1517 | { | |
1518 | struct target_waitstatus status; | |
1519 | ||
1520 | status.kind = TARGET_WAITKIND_STOPPED; | |
1521 | status.value.sig = GDB_SIGNAL_TRAP; | |
1522 | ||
1523 | return status; | |
1524 | } | |
1525 | ||
1526 | /* Clear the record histories. */ | |
1527 | ||
1528 | static void | |
1529 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
1530 | { | |
1531 | xfree (btinfo->insn_history); | |
1532 | xfree (btinfo->call_history); | |
1533 | ||
1534 | btinfo->insn_history = NULL; | |
1535 | btinfo->call_history = NULL; | |
1536 | } | |
1537 | ||
1538 | /* Step a single thread. */ | |
1539 | ||
1540 | static struct target_waitstatus | |
1541 | record_btrace_step_thread (struct thread_info *tp) | |
1542 | { | |
1543 | struct btrace_insn_iterator *replay, end; | |
1544 | struct btrace_thread_info *btinfo; | |
1545 | struct address_space *aspace; | |
1546 | struct inferior *inf; | |
1547 | enum btrace_thread_flag flags; | |
1548 | unsigned int steps; | |
1549 | ||
1550 | btinfo = &tp->btrace; | |
1551 | replay = btinfo->replay; | |
1552 | ||
1553 | flags = btinfo->flags & BTHR_MOVE; | |
1554 | btinfo->flags &= ~BTHR_MOVE; | |
1555 | ||
1556 | DEBUG ("stepping %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flags); | |
1557 | ||
1558 | switch (flags) | |
1559 | { | |
1560 | default: | |
1561 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
1562 | ||
1563 | case BTHR_STEP: | |
1564 | /* We're done if we're not replaying. */ | |
1565 | if (replay == NULL) | |
1566 | return btrace_step_no_history (); | |
1567 | ||
1568 | /* We are always able to step at least once. */ | |
1569 | steps = btrace_insn_next (replay, 1); | |
1570 | gdb_assert (steps == 1); | |
1571 | ||
1572 | /* Determine the end of the instruction trace. */ | |
1573 | btrace_insn_end (&end, btinfo); | |
1574 | ||
1575 | /* We stop replaying if we reached the end of the trace. */ | |
1576 | if (btrace_insn_cmp (replay, &end) == 0) | |
1577 | record_btrace_stop_replaying (tp); | |
1578 | ||
1579 | return btrace_step_stopped (); | |
1580 | ||
1581 | case BTHR_RSTEP: | |
1582 | /* Start replaying if we're not already doing so. */ | |
1583 | if (replay == NULL) | |
1584 | replay = record_btrace_start_replaying (tp); | |
1585 | ||
1586 | /* If we can't step any further, we reached the end of the history. */ | |
1587 | steps = btrace_insn_prev (replay, 1); | |
1588 | if (steps == 0) | |
1589 | return btrace_step_no_history (); | |
1590 | ||
1591 | return btrace_step_stopped (); | |
1592 | ||
1593 | case BTHR_CONT: | |
1594 | /* We're done if we're not replaying. */ | |
1595 | if (replay == NULL) | |
1596 | return btrace_step_no_history (); | |
1597 | ||
1598 | inf = find_inferior_pid (ptid_get_pid (tp->ptid)); | |
1599 | aspace = inf->aspace; | |
1600 | ||
1601 | /* Determine the end of the instruction trace. */ | |
1602 | btrace_insn_end (&end, btinfo); | |
1603 | ||
1604 | for (;;) | |
1605 | { | |
1606 | const struct btrace_insn *insn; | |
1607 | ||
1608 | /* We are always able to step at least once. */ | |
1609 | steps = btrace_insn_next (replay, 1); | |
1610 | gdb_assert (steps == 1); | |
1611 | ||
1612 | /* We stop replaying if we reached the end of the trace. */ | |
1613 | if (btrace_insn_cmp (replay, &end) == 0) | |
1614 | { | |
1615 | record_btrace_stop_replaying (tp); | |
1616 | return btrace_step_no_history (); | |
1617 | } | |
1618 | ||
1619 | insn = btrace_insn_get (replay); | |
1620 | gdb_assert (insn); | |
1621 | ||
1622 | DEBUG ("stepping %d (%s) ... %s", tp->num, | |
1623 | target_pid_to_str (tp->ptid), | |
1624 | core_addr_to_string_nz (insn->pc)); | |
1625 | ||
1626 | if (breakpoint_here_p (aspace, insn->pc)) | |
1627 | return btrace_step_stopped (); | |
1628 | } | |
1629 | ||
1630 | case BTHR_RCONT: | |
1631 | /* Start replaying if we're not already doing so. */ | |
1632 | if (replay == NULL) | |
1633 | replay = record_btrace_start_replaying (tp); | |
1634 | ||
1635 | inf = find_inferior_pid (ptid_get_pid (tp->ptid)); | |
1636 | aspace = inf->aspace; | |
1637 | ||
1638 | for (;;) | |
1639 | { | |
1640 | const struct btrace_insn *insn; | |
1641 | ||
1642 | /* If we can't step any further, we're done. */ | |
1643 | steps = btrace_insn_prev (replay, 1); | |
1644 | if (steps == 0) | |
1645 | return btrace_step_no_history (); | |
1646 | ||
1647 | insn = btrace_insn_get (replay); | |
1648 | gdb_assert (insn); | |
1649 | ||
1650 | DEBUG ("reverse-stepping %d (%s) ... %s", tp->num, | |
1651 | target_pid_to_str (tp->ptid), | |
1652 | core_addr_to_string_nz (insn->pc)); | |
1653 | ||
1654 | if (breakpoint_here_p (aspace, insn->pc)) | |
1655 | return btrace_step_stopped (); | |
1656 | } | |
1657 | } | |
b2f4cfde MM |
1658 | } |
1659 | ||
1660 | /* The to_wait method of target record-btrace. */ | |
1661 | ||
1662 | static ptid_t | |
1663 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
1664 | struct target_waitstatus *status, int options) | |
1665 | { | |
52834460 MM |
1666 | struct thread_info *tp, *other; |
1667 | ||
1668 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
1669 | ||
b2f4cfde | 1670 | /* As long as we're not replaying, just forward the request. */ |
52834460 | 1671 | if (!record_btrace_is_replaying () && execution_direction != EXEC_REVERSE) |
b2f4cfde MM |
1672 | { |
1673 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1674 | if (ops->to_wait != NULL) | |
1675 | return ops->to_wait (ops, ptid, status, options); | |
1676 | ||
1677 | error (_("Cannot find target for waiting.")); | |
1678 | } | |
1679 | ||
52834460 MM |
1680 | /* Let's find a thread to move. */ |
1681 | tp = record_btrace_find_thread_to_move (ptid); | |
1682 | if (tp == NULL) | |
1683 | { | |
1684 | DEBUG ("wait %s: no thread", target_pid_to_str (ptid)); | |
1685 | ||
1686 | status->kind = TARGET_WAITKIND_IGNORE; | |
1687 | return minus_one_ptid; | |
1688 | } | |
1689 | ||
1690 | /* We only move a single thread. We're not able to correlate threads. */ | |
1691 | *status = record_btrace_step_thread (tp); | |
1692 | ||
1693 | /* Stop all other threads. */ | |
1694 | if (!non_stop) | |
1695 | ALL_THREADS (other) | |
1696 | other->btrace.flags &= ~BTHR_MOVE; | |
1697 | ||
1698 | /* Start record histories anew from the current position. */ | |
1699 | record_btrace_clear_histories (&tp->btrace); | |
1700 | ||
1701 | /* We moved the replay position but did not update registers. */ | |
1702 | registers_changed_ptid (tp->ptid); | |
1703 | ||
1704 | return tp->ptid; | |
1705 | } | |
1706 | ||
1707 | /* The to_can_execute_reverse method of target record-btrace. */ | |
1708 | ||
1709 | static int | |
1710 | record_btrace_can_execute_reverse (void) | |
1711 | { | |
1712 | return 1; | |
1713 | } | |
1714 | ||
1715 | /* The to_decr_pc_after_break method of target record-btrace. */ | |
1716 | ||
1717 | static CORE_ADDR | |
1718 | record_btrace_decr_pc_after_break (struct target_ops *ops, | |
1719 | struct gdbarch *gdbarch) | |
1720 | { | |
1721 | /* When replaying, we do not actually execute the breakpoint instruction | |
1722 | so there is no need to adjust the PC after hitting a breakpoint. */ | |
1723 | if (record_btrace_is_replaying ()) | |
1724 | return 0; | |
1725 | ||
1726 | return forward_target_decr_pc_after_break (ops->beneath, gdbarch); | |
b2f4cfde MM |
1727 | } |
1728 | ||
e2887aa3 MM |
1729 | /* The to_find_new_threads method of target record-btrace. */ |
1730 | ||
1731 | static void | |
1732 | record_btrace_find_new_threads (struct target_ops *ops) | |
1733 | { | |
1734 | /* Don't expect new threads if we're replaying. */ | |
1735 | if (record_btrace_is_replaying ()) | |
1736 | return; | |
1737 | ||
1738 | /* Forward the request. */ | |
1739 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1740 | if (ops->to_find_new_threads != NULL) | |
1741 | { | |
1742 | ops->to_find_new_threads (ops); | |
1743 | break; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | /* The to_thread_alive method of target record-btrace. */ | |
1748 | ||
1749 | static int | |
1750 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
1751 | { | |
1752 | /* We don't add or remove threads during replay. */ | |
1753 | if (record_btrace_is_replaying ()) | |
1754 | return find_thread_ptid (ptid) != NULL; | |
1755 | ||
1756 | /* Forward the request. */ | |
1757 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1758 | if (ops->to_thread_alive != NULL) | |
1759 | return ops->to_thread_alive (ops, ptid); | |
1760 | ||
1761 | return 0; | |
1762 | } | |
1763 | ||
066ce621 MM |
1764 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
1765 | is stopped. */ | |
1766 | ||
1767 | static void | |
1768 | record_btrace_set_replay (struct thread_info *tp, | |
1769 | const struct btrace_insn_iterator *it) | |
1770 | { | |
1771 | struct btrace_thread_info *btinfo; | |
1772 | ||
1773 | btinfo = &tp->btrace; | |
1774 | ||
1775 | if (it == NULL || it->function == NULL) | |
52834460 | 1776 | record_btrace_stop_replaying (tp); |
066ce621 MM |
1777 | else |
1778 | { | |
1779 | if (btinfo->replay == NULL) | |
52834460 | 1780 | record_btrace_start_replaying (tp); |
066ce621 MM |
1781 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
1782 | return; | |
1783 | ||
1784 | *btinfo->replay = *it; | |
52834460 | 1785 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
1786 | } |
1787 | ||
52834460 MM |
1788 | /* Start anew from the new replay position. */ |
1789 | record_btrace_clear_histories (btinfo); | |
066ce621 MM |
1790 | } |
1791 | ||
1792 | /* The to_goto_record_begin method of target record-btrace. */ | |
1793 | ||
1794 | static void | |
1795 | record_btrace_goto_begin (void) | |
1796 | { | |
1797 | struct thread_info *tp; | |
1798 | struct btrace_insn_iterator begin; | |
1799 | ||
1800 | tp = require_btrace_thread (); | |
1801 | ||
1802 | btrace_insn_begin (&begin, &tp->btrace); | |
1803 | record_btrace_set_replay (tp, &begin); | |
1804 | ||
1805 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1806 | } | |
1807 | ||
1808 | /* The to_goto_record_end method of target record-btrace. */ | |
1809 | ||
1810 | static void | |
1811 | record_btrace_goto_end (void) | |
1812 | { | |
1813 | struct thread_info *tp; | |
1814 | ||
1815 | tp = require_btrace_thread (); | |
1816 | ||
1817 | record_btrace_set_replay (tp, NULL); | |
1818 | ||
1819 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1820 | } | |
1821 | ||
1822 | /* The to_goto_record method of target record-btrace. */ | |
1823 | ||
1824 | static void | |
1825 | record_btrace_goto (ULONGEST insn) | |
1826 | { | |
1827 | struct thread_info *tp; | |
1828 | struct btrace_insn_iterator it; | |
1829 | unsigned int number; | |
1830 | int found; | |
1831 | ||
1832 | number = insn; | |
1833 | ||
1834 | /* Check for wrap-arounds. */ | |
1835 | if (number != insn) | |
1836 | error (_("Instruction number out of range.")); | |
1837 | ||
1838 | tp = require_btrace_thread (); | |
1839 | ||
1840 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
1841 | if (found == 0) | |
1842 | error (_("No such instruction.")); | |
1843 | ||
1844 | record_btrace_set_replay (tp, &it); | |
1845 | ||
1846 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1847 | } | |
1848 | ||
afedecd3 MM |
1849 | /* Initialize the record-btrace target ops. */ |
1850 | ||
1851 | static void | |
1852 | init_record_btrace_ops (void) | |
1853 | { | |
1854 | struct target_ops *ops; | |
1855 | ||
1856 | ops = &record_btrace_ops; | |
1857 | ops->to_shortname = "record-btrace"; | |
1858 | ops->to_longname = "Branch tracing target"; | |
1859 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
1860 | ops->to_open = record_btrace_open; | |
1861 | ops->to_close = record_btrace_close; | |
1862 | ops->to_detach = record_detach; | |
1863 | ops->to_disconnect = record_disconnect; | |
1864 | ops->to_mourn_inferior = record_mourn_inferior; | |
1865 | ops->to_kill = record_kill; | |
1866 | ops->to_create_inferior = find_default_create_inferior; | |
1867 | ops->to_stop_recording = record_btrace_stop_recording; | |
1868 | ops->to_info_record = record_btrace_info; | |
1869 | ops->to_insn_history = record_btrace_insn_history; | |
1870 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
1871 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
1872 | ops->to_call_history = record_btrace_call_history; | |
1873 | ops->to_call_history_from = record_btrace_call_history_from; | |
1874 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 1875 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
1876 | ops->to_xfer_partial = record_btrace_xfer_partial; |
1877 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
1878 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
1879 | ops->to_fetch_registers = record_btrace_fetch_registers; |
1880 | ops->to_store_registers = record_btrace_store_registers; | |
1881 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
cecac1ab | 1882 | ops->to_get_unwinder = &record_btrace_frame_unwind; |
0b722aec | 1883 | ops->to_get_tailcall_unwinder = &record_btrace_tailcall_frame_unwind; |
b2f4cfde MM |
1884 | ops->to_resume = record_btrace_resume; |
1885 | ops->to_wait = record_btrace_wait; | |
e2887aa3 MM |
1886 | ops->to_find_new_threads = record_btrace_find_new_threads; |
1887 | ops->to_thread_alive = record_btrace_thread_alive; | |
066ce621 MM |
1888 | ops->to_goto_record_begin = record_btrace_goto_begin; |
1889 | ops->to_goto_record_end = record_btrace_goto_end; | |
1890 | ops->to_goto_record = record_btrace_goto; | |
52834460 MM |
1891 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
1892 | ops->to_decr_pc_after_break = record_btrace_decr_pc_after_break; | |
afedecd3 MM |
1893 | ops->to_stratum = record_stratum; |
1894 | ops->to_magic = OPS_MAGIC; | |
1895 | } | |
1896 | ||
1897 | /* Alias for "target record". */ | |
1898 | ||
1899 | static void | |
1900 | cmd_record_btrace_start (char *args, int from_tty) | |
1901 | { | |
1902 | if (args != NULL && *args != 0) | |
1903 | error (_("Invalid argument.")); | |
1904 | ||
1905 | execute_command ("target record-btrace", from_tty); | |
1906 | } | |
1907 | ||
1908 | void _initialize_record_btrace (void); | |
1909 | ||
1910 | /* Initialize btrace commands. */ | |
1911 | ||
1912 | void | |
1913 | _initialize_record_btrace (void) | |
1914 | { | |
1915 | add_cmd ("btrace", class_obscure, cmd_record_btrace_start, | |
1916 | _("Start branch trace recording."), | |
1917 | &record_cmdlist); | |
1918 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); | |
1919 | ||
1920 | init_record_btrace_ops (); | |
1921 | add_target (&record_btrace_ops); | |
0b722aec MM |
1922 | |
1923 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
1924 | xcalloc, xfree); | |
afedecd3 | 1925 | } |