Commit | Line | Data |
---|---|---|
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 | { |
568e808b MM |
216 | struct thread_info *tp; |
217 | ||
99c819ee MM |
218 | /* Make sure automatic recording gets disabled even if we did not stop |
219 | recording before closing the record-btrace target. */ | |
220 | record_btrace_auto_disable (); | |
221 | ||
568e808b MM |
222 | /* We should have already stopped recording. |
223 | Tear down btrace in case we have not. */ | |
224 | ALL_THREADS (tp) | |
225 | btrace_teardown (tp); | |
afedecd3 MM |
226 | } |
227 | ||
228 | /* The to_info_record method of target record-btrace. */ | |
229 | ||
230 | static void | |
231 | record_btrace_info (void) | |
232 | { | |
233 | struct btrace_thread_info *btinfo; | |
234 | struct thread_info *tp; | |
23a7fe75 | 235 | unsigned int insns, calls; |
afedecd3 MM |
236 | |
237 | DEBUG ("info"); | |
238 | ||
239 | tp = find_thread_ptid (inferior_ptid); | |
240 | if (tp == NULL) | |
241 | error (_("No thread.")); | |
242 | ||
243 | btrace_fetch (tp); | |
244 | ||
23a7fe75 MM |
245 | insns = 0; |
246 | calls = 0; | |
247 | ||
afedecd3 | 248 | btinfo = &tp->btrace; |
6e07b1d2 MM |
249 | |
250 | if (!btrace_is_empty (tp)) | |
23a7fe75 MM |
251 | { |
252 | struct btrace_call_iterator call; | |
253 | struct btrace_insn_iterator insn; | |
254 | ||
255 | btrace_call_end (&call, btinfo); | |
256 | btrace_call_prev (&call, 1); | |
5de9129b | 257 | calls = btrace_call_number (&call); |
23a7fe75 MM |
258 | |
259 | btrace_insn_end (&insn, btinfo); | |
260 | btrace_insn_prev (&insn, 1); | |
5de9129b | 261 | insns = btrace_insn_number (&insn); |
23a7fe75 | 262 | } |
afedecd3 MM |
263 | |
264 | printf_unfiltered (_("Recorded %u instructions in %u functions for thread " | |
23a7fe75 | 265 | "%d (%s).\n"), insns, calls, tp->num, |
afedecd3 | 266 | target_pid_to_str (tp->ptid)); |
07bbe694 MM |
267 | |
268 | if (btrace_is_replaying (tp)) | |
269 | printf_unfiltered (_("Replay in progress. At instruction %u.\n"), | |
270 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
271 | } |
272 | ||
273 | /* Print an unsigned int. */ | |
274 | ||
275 | static void | |
276 | ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) | |
277 | { | |
278 | ui_out_field_fmt (uiout, fld, "%u", val); | |
279 | } | |
280 | ||
281 | /* Disassemble a section of the recorded instruction trace. */ | |
282 | ||
283 | static void | |
23a7fe75 MM |
284 | btrace_insn_history (struct ui_out *uiout, |
285 | const struct btrace_insn_iterator *begin, | |
286 | const struct btrace_insn_iterator *end, int flags) | |
afedecd3 MM |
287 | { |
288 | struct gdbarch *gdbarch; | |
23a7fe75 | 289 | struct btrace_insn_iterator it; |
afedecd3 | 290 | |
23a7fe75 MM |
291 | DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), |
292 | btrace_insn_number (end)); | |
afedecd3 MM |
293 | |
294 | gdbarch = target_gdbarch (); | |
295 | ||
23a7fe75 | 296 | for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) |
afedecd3 | 297 | { |
23a7fe75 MM |
298 | const struct btrace_insn *insn; |
299 | ||
300 | insn = btrace_insn_get (&it); | |
301 | ||
afedecd3 | 302 | /* Print the instruction index. */ |
23a7fe75 | 303 | ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); |
afedecd3 MM |
304 | ui_out_text (uiout, "\t"); |
305 | ||
306 | /* Disassembly with '/m' flag may not produce the expected result. | |
307 | See PR gdb/11833. */ | |
23a7fe75 | 308 | gdb_disassembly (gdbarch, uiout, NULL, flags, 1, insn->pc, insn->pc + 1); |
afedecd3 MM |
309 | } |
310 | } | |
311 | ||
312 | /* The to_insn_history method of target record-btrace. */ | |
313 | ||
314 | static void | |
315 | record_btrace_insn_history (int size, int flags) | |
316 | { | |
317 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
318 | struct btrace_insn_history *history; |
319 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
320 | struct cleanup *uiout_cleanup; |
321 | struct ui_out *uiout; | |
23a7fe75 | 322 | unsigned int context, covered; |
afedecd3 MM |
323 | |
324 | uiout = current_uiout; | |
325 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
326 | "insn history"); | |
afedecd3 | 327 | context = abs (size); |
afedecd3 MM |
328 | if (context == 0) |
329 | error (_("Bad record instruction-history-size.")); | |
330 | ||
23a7fe75 MM |
331 | btinfo = require_btrace (); |
332 | history = btinfo->insn_history; | |
333 | if (history == NULL) | |
afedecd3 | 334 | { |
07bbe694 | 335 | struct btrace_insn_iterator *replay; |
afedecd3 | 336 | |
23a7fe75 | 337 | DEBUG ("insn-history (0x%x): %d", flags, size); |
afedecd3 | 338 | |
07bbe694 MM |
339 | /* If we're replaying, we start at the replay position. Otherwise, we |
340 | start at the tail of the trace. */ | |
341 | replay = btinfo->replay; | |
342 | if (replay != NULL) | |
343 | begin = *replay; | |
344 | else | |
345 | btrace_insn_end (&begin, btinfo); | |
346 | ||
347 | /* We start from here and expand in the requested direction. Then we | |
348 | expand in the other direction, as well, to fill up any remaining | |
349 | context. */ | |
350 | end = begin; | |
351 | if (size < 0) | |
352 | { | |
353 | /* We want the current position covered, as well. */ | |
354 | covered = btrace_insn_next (&end, 1); | |
355 | covered += btrace_insn_prev (&begin, context - covered); | |
356 | covered += btrace_insn_next (&end, context - covered); | |
357 | } | |
358 | else | |
359 | { | |
360 | covered = btrace_insn_next (&end, context); | |
361 | covered += btrace_insn_prev (&begin, context - covered); | |
362 | } | |
afedecd3 MM |
363 | } |
364 | else | |
365 | { | |
23a7fe75 MM |
366 | begin = history->begin; |
367 | end = history->end; | |
afedecd3 | 368 | |
23a7fe75 MM |
369 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size, |
370 | btrace_insn_number (&begin), btrace_insn_number (&end)); | |
afedecd3 | 371 | |
23a7fe75 MM |
372 | if (size < 0) |
373 | { | |
374 | end = begin; | |
375 | covered = btrace_insn_prev (&begin, context); | |
376 | } | |
377 | else | |
378 | { | |
379 | begin = end; | |
380 | covered = btrace_insn_next (&end, context); | |
381 | } | |
afedecd3 MM |
382 | } |
383 | ||
23a7fe75 MM |
384 | if (covered > 0) |
385 | btrace_insn_history (uiout, &begin, &end, flags); | |
386 | else | |
387 | { | |
388 | if (size < 0) | |
389 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
390 | else | |
391 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
392 | } | |
afedecd3 | 393 | |
23a7fe75 | 394 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
395 | do_cleanups (uiout_cleanup); |
396 | } | |
397 | ||
398 | /* The to_insn_history_range method of target record-btrace. */ | |
399 | ||
400 | static void | |
401 | record_btrace_insn_history_range (ULONGEST from, ULONGEST to, int flags) | |
402 | { | |
403 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
404 | struct btrace_insn_history *history; |
405 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
406 | struct cleanup *uiout_cleanup; |
407 | struct ui_out *uiout; | |
23a7fe75 MM |
408 | unsigned int low, high; |
409 | int found; | |
afedecd3 MM |
410 | |
411 | uiout = current_uiout; | |
412 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
413 | "insn history"); | |
23a7fe75 MM |
414 | low = from; |
415 | high = to; | |
afedecd3 | 416 | |
23a7fe75 | 417 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
418 | |
419 | /* Check for wrap-arounds. */ | |
23a7fe75 | 420 | if (low != from || high != to) |
afedecd3 MM |
421 | error (_("Bad range.")); |
422 | ||
0688d04e | 423 | if (high < low) |
afedecd3 MM |
424 | error (_("Bad range.")); |
425 | ||
23a7fe75 | 426 | btinfo = require_btrace (); |
afedecd3 | 427 | |
23a7fe75 MM |
428 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
429 | if (found == 0) | |
430 | error (_("Range out of bounds.")); | |
afedecd3 | 431 | |
23a7fe75 MM |
432 | found = btrace_find_insn_by_number (&end, btinfo, high); |
433 | if (found == 0) | |
0688d04e MM |
434 | { |
435 | /* Silently truncate the range. */ | |
436 | btrace_insn_end (&end, btinfo); | |
437 | } | |
438 | else | |
439 | { | |
440 | /* We want both begin and end to be inclusive. */ | |
441 | btrace_insn_next (&end, 1); | |
442 | } | |
afedecd3 | 443 | |
23a7fe75 MM |
444 | btrace_insn_history (uiout, &begin, &end, flags); |
445 | btrace_set_insn_history (btinfo, &begin, &end); | |
afedecd3 MM |
446 | |
447 | do_cleanups (uiout_cleanup); | |
448 | } | |
449 | ||
450 | /* The to_insn_history_from method of target record-btrace. */ | |
451 | ||
452 | static void | |
453 | record_btrace_insn_history_from (ULONGEST from, int size, int flags) | |
454 | { | |
455 | ULONGEST begin, end, context; | |
456 | ||
457 | context = abs (size); | |
0688d04e MM |
458 | if (context == 0) |
459 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
460 | |
461 | if (size < 0) | |
462 | { | |
463 | end = from; | |
464 | ||
465 | if (from < context) | |
466 | begin = 0; | |
467 | else | |
0688d04e | 468 | begin = from - context + 1; |
afedecd3 MM |
469 | } |
470 | else | |
471 | { | |
472 | begin = from; | |
0688d04e | 473 | end = from + context - 1; |
afedecd3 MM |
474 | |
475 | /* Check for wrap-around. */ | |
476 | if (end < begin) | |
477 | end = ULONGEST_MAX; | |
478 | } | |
479 | ||
480 | record_btrace_insn_history_range (begin, end, flags); | |
481 | } | |
482 | ||
483 | /* Print the instruction number range for a function call history line. */ | |
484 | ||
485 | static void | |
23a7fe75 MM |
486 | btrace_call_history_insn_range (struct ui_out *uiout, |
487 | const struct btrace_function *bfun) | |
afedecd3 | 488 | { |
7acbe133 MM |
489 | unsigned int begin, end, size; |
490 | ||
491 | size = VEC_length (btrace_insn_s, bfun->insn); | |
492 | gdb_assert (size > 0); | |
afedecd3 | 493 | |
23a7fe75 | 494 | begin = bfun->insn_offset; |
7acbe133 | 495 | end = begin + size - 1; |
afedecd3 | 496 | |
23a7fe75 | 497 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 498 | ui_out_text (uiout, ","); |
23a7fe75 | 499 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
500 | } |
501 | ||
502 | /* Print the source line information for a function call history line. */ | |
503 | ||
504 | static void | |
23a7fe75 MM |
505 | btrace_call_history_src_line (struct ui_out *uiout, |
506 | const struct btrace_function *bfun) | |
afedecd3 MM |
507 | { |
508 | struct symbol *sym; | |
23a7fe75 | 509 | int begin, end; |
afedecd3 MM |
510 | |
511 | sym = bfun->sym; | |
512 | if (sym == NULL) | |
513 | return; | |
514 | ||
515 | ui_out_field_string (uiout, "file", | |
516 | symtab_to_filename_for_display (sym->symtab)); | |
517 | ||
23a7fe75 MM |
518 | begin = bfun->lbegin; |
519 | end = bfun->lend; | |
520 | ||
521 | if (end < begin) | |
afedecd3 MM |
522 | return; |
523 | ||
524 | ui_out_text (uiout, ":"); | |
23a7fe75 | 525 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 526 | |
23a7fe75 | 527 | if (end == begin) |
afedecd3 MM |
528 | return; |
529 | ||
8710b709 | 530 | ui_out_text (uiout, ","); |
23a7fe75 | 531 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
532 | } |
533 | ||
0b722aec MM |
534 | /* Get the name of a branch trace function. */ |
535 | ||
536 | static const char * | |
537 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
538 | { | |
539 | struct minimal_symbol *msym; | |
540 | struct symbol *sym; | |
541 | ||
542 | if (bfun == NULL) | |
543 | return "??"; | |
544 | ||
545 | msym = bfun->msym; | |
546 | sym = bfun->sym; | |
547 | ||
548 | if (sym != NULL) | |
549 | return SYMBOL_PRINT_NAME (sym); | |
550 | else if (msym != NULL) | |
551 | return SYMBOL_PRINT_NAME (msym); | |
552 | else | |
553 | return "??"; | |
554 | } | |
555 | ||
afedecd3 MM |
556 | /* Disassemble a section of the recorded function trace. */ |
557 | ||
558 | static void | |
23a7fe75 | 559 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 560 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
561 | const struct btrace_call_iterator *begin, |
562 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
563 | enum record_print_flag flags) |
564 | { | |
23a7fe75 | 565 | struct btrace_call_iterator it; |
afedecd3 | 566 | |
23a7fe75 MM |
567 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
568 | btrace_call_number (end)); | |
afedecd3 | 569 | |
23a7fe75 | 570 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 571 | { |
23a7fe75 MM |
572 | const struct btrace_function *bfun; |
573 | struct minimal_symbol *msym; | |
574 | struct symbol *sym; | |
575 | ||
576 | bfun = btrace_call_get (&it); | |
23a7fe75 | 577 | sym = bfun->sym; |
0b722aec | 578 | msym = bfun->msym; |
23a7fe75 | 579 | |
afedecd3 | 580 | /* Print the function index. */ |
23a7fe75 | 581 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
582 | ui_out_text (uiout, "\t"); |
583 | ||
8710b709 MM |
584 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
585 | { | |
586 | int level = bfun->level + btinfo->level, i; | |
587 | ||
588 | for (i = 0; i < level; ++i) | |
589 | ui_out_text (uiout, " "); | |
590 | } | |
591 | ||
592 | if (sym != NULL) | |
593 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
594 | else if (msym != NULL) | |
595 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (msym)); | |
596 | else if (!ui_out_is_mi_like_p (uiout)) | |
597 | ui_out_field_string (uiout, "function", "??"); | |
598 | ||
1e038f67 | 599 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 600 | { |
8710b709 | 601 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 602 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
603 | } |
604 | ||
1e038f67 | 605 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 606 | { |
8710b709 | 607 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 608 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
609 | } |
610 | ||
afedecd3 MM |
611 | ui_out_text (uiout, "\n"); |
612 | } | |
613 | } | |
614 | ||
615 | /* The to_call_history method of target record-btrace. */ | |
616 | ||
617 | static void | |
618 | record_btrace_call_history (int size, int flags) | |
619 | { | |
620 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
621 | struct btrace_call_history *history; |
622 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
623 | struct cleanup *uiout_cleanup; |
624 | struct ui_out *uiout; | |
23a7fe75 | 625 | unsigned int context, covered; |
afedecd3 MM |
626 | |
627 | uiout = current_uiout; | |
628 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
629 | "insn history"); | |
afedecd3 | 630 | context = abs (size); |
afedecd3 MM |
631 | if (context == 0) |
632 | error (_("Bad record function-call-history-size.")); | |
633 | ||
23a7fe75 MM |
634 | btinfo = require_btrace (); |
635 | history = btinfo->call_history; | |
636 | if (history == NULL) | |
afedecd3 | 637 | { |
07bbe694 | 638 | struct btrace_insn_iterator *replay; |
afedecd3 | 639 | |
23a7fe75 | 640 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 641 | |
07bbe694 MM |
642 | /* If we're replaying, we start at the replay position. Otherwise, we |
643 | start at the tail of the trace. */ | |
644 | replay = btinfo->replay; | |
645 | if (replay != NULL) | |
646 | { | |
647 | begin.function = replay->function; | |
648 | begin.btinfo = btinfo; | |
649 | } | |
650 | else | |
651 | btrace_call_end (&begin, btinfo); | |
652 | ||
653 | /* We start from here and expand in the requested direction. Then we | |
654 | expand in the other direction, as well, to fill up any remaining | |
655 | context. */ | |
656 | end = begin; | |
657 | if (size < 0) | |
658 | { | |
659 | /* We want the current position covered, as well. */ | |
660 | covered = btrace_call_next (&end, 1); | |
661 | covered += btrace_call_prev (&begin, context - covered); | |
662 | covered += btrace_call_next (&end, context - covered); | |
663 | } | |
664 | else | |
665 | { | |
666 | covered = btrace_call_next (&end, context); | |
667 | covered += btrace_call_prev (&begin, context- covered); | |
668 | } | |
afedecd3 MM |
669 | } |
670 | else | |
671 | { | |
23a7fe75 MM |
672 | begin = history->begin; |
673 | end = history->end; | |
afedecd3 | 674 | |
23a7fe75 MM |
675 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
676 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 677 | |
23a7fe75 MM |
678 | if (size < 0) |
679 | { | |
680 | end = begin; | |
681 | covered = btrace_call_prev (&begin, context); | |
682 | } | |
683 | else | |
684 | { | |
685 | begin = end; | |
686 | covered = btrace_call_next (&end, context); | |
687 | } | |
afedecd3 MM |
688 | } |
689 | ||
23a7fe75 | 690 | if (covered > 0) |
8710b709 | 691 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
692 | else |
693 | { | |
694 | if (size < 0) | |
695 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
696 | else | |
697 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
698 | } | |
afedecd3 | 699 | |
23a7fe75 | 700 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
701 | do_cleanups (uiout_cleanup); |
702 | } | |
703 | ||
704 | /* The to_call_history_range method of target record-btrace. */ | |
705 | ||
706 | static void | |
707 | record_btrace_call_history_range (ULONGEST from, ULONGEST to, int flags) | |
708 | { | |
709 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
710 | struct btrace_call_history *history; |
711 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
712 | struct cleanup *uiout_cleanup; |
713 | struct ui_out *uiout; | |
23a7fe75 MM |
714 | unsigned int low, high; |
715 | int found; | |
afedecd3 MM |
716 | |
717 | uiout = current_uiout; | |
718 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
719 | "func history"); | |
23a7fe75 MM |
720 | low = from; |
721 | high = to; | |
afedecd3 | 722 | |
23a7fe75 | 723 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
724 | |
725 | /* Check for wrap-arounds. */ | |
23a7fe75 | 726 | if (low != from || high != to) |
afedecd3 MM |
727 | error (_("Bad range.")); |
728 | ||
0688d04e | 729 | if (high < low) |
afedecd3 MM |
730 | error (_("Bad range.")); |
731 | ||
23a7fe75 | 732 | btinfo = require_btrace (); |
afedecd3 | 733 | |
23a7fe75 MM |
734 | found = btrace_find_call_by_number (&begin, btinfo, low); |
735 | if (found == 0) | |
736 | error (_("Range out of bounds.")); | |
afedecd3 | 737 | |
23a7fe75 MM |
738 | found = btrace_find_call_by_number (&end, btinfo, high); |
739 | if (found == 0) | |
0688d04e MM |
740 | { |
741 | /* Silently truncate the range. */ | |
742 | btrace_call_end (&end, btinfo); | |
743 | } | |
744 | else | |
745 | { | |
746 | /* We want both begin and end to be inclusive. */ | |
747 | btrace_call_next (&end, 1); | |
748 | } | |
afedecd3 | 749 | |
8710b709 | 750 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 751 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
752 | |
753 | do_cleanups (uiout_cleanup); | |
754 | } | |
755 | ||
756 | /* The to_call_history_from method of target record-btrace. */ | |
757 | ||
758 | static void | |
759 | record_btrace_call_history_from (ULONGEST from, int size, int flags) | |
760 | { | |
761 | ULONGEST begin, end, context; | |
762 | ||
763 | context = abs (size); | |
0688d04e MM |
764 | if (context == 0) |
765 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
766 | |
767 | if (size < 0) | |
768 | { | |
769 | end = from; | |
770 | ||
771 | if (from < context) | |
772 | begin = 0; | |
773 | else | |
0688d04e | 774 | begin = from - context + 1; |
afedecd3 MM |
775 | } |
776 | else | |
777 | { | |
778 | begin = from; | |
0688d04e | 779 | end = from + context - 1; |
afedecd3 MM |
780 | |
781 | /* Check for wrap-around. */ | |
782 | if (end < begin) | |
783 | end = ULONGEST_MAX; | |
784 | } | |
785 | ||
786 | record_btrace_call_history_range (begin, end, flags); | |
787 | } | |
788 | ||
07bbe694 MM |
789 | /* The to_record_is_replaying method of target record-btrace. */ |
790 | ||
791 | static int | |
792 | record_btrace_is_replaying (void) | |
793 | { | |
794 | struct thread_info *tp; | |
795 | ||
796 | ALL_THREADS (tp) | |
797 | if (btrace_is_replaying (tp)) | |
798 | return 1; | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
633785ff MM |
803 | /* The to_xfer_partial method of target record-btrace. */ |
804 | ||
9b409511 | 805 | static enum target_xfer_status |
633785ff MM |
806 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
807 | const char *annex, gdb_byte *readbuf, | |
808 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 809 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
810 | { |
811 | struct target_ops *t; | |
812 | ||
813 | /* Filter out requests that don't make sense during replay. */ | |
814 | if (!record_btrace_allow_memory_access && record_btrace_is_replaying ()) | |
815 | { | |
816 | switch (object) | |
817 | { | |
818 | case TARGET_OBJECT_MEMORY: | |
819 | { | |
820 | struct target_section *section; | |
821 | ||
822 | /* We do not allow writing memory in general. */ | |
823 | if (writebuf != NULL) | |
9b409511 YQ |
824 | { |
825 | *xfered_len = len; | |
826 | return TARGET_XFER_E_UNAVAILABLE; | |
827 | } | |
633785ff MM |
828 | |
829 | /* We allow reading readonly memory. */ | |
830 | section = target_section_by_addr (ops, offset); | |
831 | if (section != NULL) | |
832 | { | |
833 | /* Check if the section we found is readonly. */ | |
834 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
835 | section->the_bfd_section) | |
836 | & SEC_READONLY) != 0) | |
837 | { | |
838 | /* Truncate the request to fit into this section. */ | |
839 | len = min (len, section->endaddr - offset); | |
840 | break; | |
841 | } | |
842 | } | |
843 | ||
9b409511 | 844 | *xfered_len = len; |
633785ff MM |
845 | return TARGET_XFER_E_UNAVAILABLE; |
846 | } | |
847 | } | |
848 | } | |
849 | ||
850 | /* Forward the request. */ | |
851 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
852 | if (ops->to_xfer_partial != NULL) | |
853 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
9b409511 | 854 | offset, len, xfered_len); |
633785ff | 855 | |
9b409511 | 856 | *xfered_len = len; |
633785ff MM |
857 | return TARGET_XFER_E_UNAVAILABLE; |
858 | } | |
859 | ||
860 | /* The to_insert_breakpoint method of target record-btrace. */ | |
861 | ||
862 | static int | |
863 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
864 | struct gdbarch *gdbarch, | |
865 | struct bp_target_info *bp_tgt) | |
866 | { | |
867 | volatile struct gdb_exception except; | |
868 | int old, ret; | |
869 | ||
870 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
871 | duration of this function. */ | |
872 | old = record_btrace_allow_memory_access; | |
873 | record_btrace_allow_memory_access = 1; | |
874 | ||
875 | ret = 0; | |
876 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 877 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff MM |
878 | |
879 | record_btrace_allow_memory_access = old; | |
880 | ||
881 | if (except.reason < 0) | |
882 | throw_exception (except); | |
883 | ||
884 | return ret; | |
885 | } | |
886 | ||
887 | /* The to_remove_breakpoint method of target record-btrace. */ | |
888 | ||
889 | static int | |
890 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
891 | struct gdbarch *gdbarch, | |
892 | struct bp_target_info *bp_tgt) | |
893 | { | |
894 | volatile struct gdb_exception except; | |
895 | int old, ret; | |
896 | ||
897 | /* Removing breakpoints requires accessing memory. Allow it for the | |
898 | duration of this function. */ | |
899 | old = record_btrace_allow_memory_access; | |
900 | record_btrace_allow_memory_access = 1; | |
901 | ||
902 | ret = 0; | |
903 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 904 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff MM |
905 | |
906 | record_btrace_allow_memory_access = old; | |
907 | ||
908 | if (except.reason < 0) | |
909 | throw_exception (except); | |
910 | ||
911 | return ret; | |
912 | } | |
913 | ||
1f3ef581 MM |
914 | /* The to_fetch_registers method of target record-btrace. */ |
915 | ||
916 | static void | |
917 | record_btrace_fetch_registers (struct target_ops *ops, | |
918 | struct regcache *regcache, int regno) | |
919 | { | |
920 | struct btrace_insn_iterator *replay; | |
921 | struct thread_info *tp; | |
922 | ||
923 | tp = find_thread_ptid (inferior_ptid); | |
924 | gdb_assert (tp != NULL); | |
925 | ||
926 | replay = tp->btrace.replay; | |
927 | if (replay != NULL) | |
928 | { | |
929 | const struct btrace_insn *insn; | |
930 | struct gdbarch *gdbarch; | |
931 | int pcreg; | |
932 | ||
933 | gdbarch = get_regcache_arch (regcache); | |
934 | pcreg = gdbarch_pc_regnum (gdbarch); | |
935 | if (pcreg < 0) | |
936 | return; | |
937 | ||
938 | /* We can only provide the PC register. */ | |
939 | if (regno >= 0 && regno != pcreg) | |
940 | return; | |
941 | ||
942 | insn = btrace_insn_get (replay); | |
943 | gdb_assert (insn != NULL); | |
944 | ||
945 | regcache_raw_supply (regcache, regno, &insn->pc); | |
946 | } | |
947 | else | |
948 | { | |
949 | struct target_ops *t; | |
950 | ||
951 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
952 | if (t->to_fetch_registers != NULL) | |
953 | { | |
954 | t->to_fetch_registers (t, regcache, regno); | |
955 | break; | |
956 | } | |
957 | } | |
958 | } | |
959 | ||
960 | /* The to_store_registers method of target record-btrace. */ | |
961 | ||
962 | static void | |
963 | record_btrace_store_registers (struct target_ops *ops, | |
964 | struct regcache *regcache, int regno) | |
965 | { | |
966 | struct target_ops *t; | |
967 | ||
968 | if (record_btrace_is_replaying ()) | |
969 | error (_("This record target does not allow writing registers.")); | |
970 | ||
971 | gdb_assert (may_write_registers != 0); | |
972 | ||
973 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
974 | if (t->to_store_registers != NULL) | |
975 | { | |
976 | t->to_store_registers (t, regcache, regno); | |
977 | return; | |
978 | } | |
979 | ||
980 | noprocess (); | |
981 | } | |
982 | ||
983 | /* The to_prepare_to_store method of target record-btrace. */ | |
984 | ||
985 | static void | |
986 | record_btrace_prepare_to_store (struct target_ops *ops, | |
987 | struct regcache *regcache) | |
988 | { | |
989 | struct target_ops *t; | |
990 | ||
991 | if (record_btrace_is_replaying ()) | |
992 | return; | |
993 | ||
994 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
995 | if (t->to_prepare_to_store != NULL) | |
996 | { | |
997 | t->to_prepare_to_store (t, regcache); | |
998 | return; | |
999 | } | |
1000 | } | |
1001 | ||
0b722aec MM |
1002 | /* The branch trace frame cache. */ |
1003 | ||
1004 | struct btrace_frame_cache | |
1005 | { | |
1006 | /* The thread. */ | |
1007 | struct thread_info *tp; | |
1008 | ||
1009 | /* The frame info. */ | |
1010 | struct frame_info *frame; | |
1011 | ||
1012 | /* The branch trace function segment. */ | |
1013 | const struct btrace_function *bfun; | |
1014 | }; | |
1015 | ||
1016 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1017 | ||
1018 | static htab_t bfcache; | |
1019 | ||
1020 | /* hash_f for htab_create_alloc of bfcache. */ | |
1021 | ||
1022 | static hashval_t | |
1023 | bfcache_hash (const void *arg) | |
1024 | { | |
1025 | const struct btrace_frame_cache *cache = arg; | |
1026 | ||
1027 | return htab_hash_pointer (cache->frame); | |
1028 | } | |
1029 | ||
1030 | /* eq_f for htab_create_alloc of bfcache. */ | |
1031 | ||
1032 | static int | |
1033 | bfcache_eq (const void *arg1, const void *arg2) | |
1034 | { | |
1035 | const struct btrace_frame_cache *cache1 = arg1; | |
1036 | const struct btrace_frame_cache *cache2 = arg2; | |
1037 | ||
1038 | return cache1->frame == cache2->frame; | |
1039 | } | |
1040 | ||
1041 | /* Create a new btrace frame cache. */ | |
1042 | ||
1043 | static struct btrace_frame_cache * | |
1044 | bfcache_new (struct frame_info *frame) | |
1045 | { | |
1046 | struct btrace_frame_cache *cache; | |
1047 | void **slot; | |
1048 | ||
1049 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1050 | cache->frame = frame; | |
1051 | ||
1052 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1053 | gdb_assert (*slot == NULL); | |
1054 | *slot = cache; | |
1055 | ||
1056 | return cache; | |
1057 | } | |
1058 | ||
1059 | /* Extract the branch trace function from a branch trace frame. */ | |
1060 | ||
1061 | static const struct btrace_function * | |
1062 | btrace_get_frame_function (struct frame_info *frame) | |
1063 | { | |
1064 | const struct btrace_frame_cache *cache; | |
1065 | const struct btrace_function *bfun; | |
1066 | struct btrace_frame_cache pattern; | |
1067 | void **slot; | |
1068 | ||
1069 | pattern.frame = frame; | |
1070 | ||
1071 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1072 | if (slot == NULL) | |
1073 | return NULL; | |
1074 | ||
1075 | cache = *slot; | |
1076 | return cache->bfun; | |
1077 | } | |
1078 | ||
cecac1ab MM |
1079 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1080 | ||
1081 | static enum unwind_stop_reason | |
1082 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1083 | void **this_cache) | |
1084 | { | |
0b722aec MM |
1085 | const struct btrace_frame_cache *cache; |
1086 | const struct btrace_function *bfun; | |
1087 | ||
1088 | cache = *this_cache; | |
1089 | bfun = cache->bfun; | |
1090 | gdb_assert (bfun != NULL); | |
1091 | ||
1092 | if (bfun->up == NULL) | |
1093 | return UNWIND_UNAVAILABLE; | |
1094 | ||
1095 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1096 | } |
1097 | ||
1098 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1099 | ||
1100 | static void | |
1101 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1102 | struct frame_id *this_id) | |
1103 | { | |
0b722aec MM |
1104 | const struct btrace_frame_cache *cache; |
1105 | const struct btrace_function *bfun; | |
1106 | CORE_ADDR code, special; | |
1107 | ||
1108 | cache = *this_cache; | |
1109 | ||
1110 | bfun = cache->bfun; | |
1111 | gdb_assert (bfun != NULL); | |
1112 | ||
1113 | while (bfun->segment.prev != NULL) | |
1114 | bfun = bfun->segment.prev; | |
1115 | ||
1116 | code = get_frame_func (this_frame); | |
1117 | special = bfun->number; | |
1118 | ||
1119 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1120 | ||
1121 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1122 | btrace_get_bfun_name (cache->bfun), | |
1123 | core_addr_to_string_nz (this_id->code_addr), | |
1124 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1125 | } |
1126 | ||
1127 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1128 | ||
1129 | static struct value * | |
1130 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1131 | void **this_cache, | |
1132 | int regnum) | |
1133 | { | |
0b722aec MM |
1134 | const struct btrace_frame_cache *cache; |
1135 | const struct btrace_function *bfun, *caller; | |
1136 | const struct btrace_insn *insn; | |
1137 | struct gdbarch *gdbarch; | |
1138 | CORE_ADDR pc; | |
1139 | int pcreg; | |
1140 | ||
1141 | gdbarch = get_frame_arch (this_frame); | |
1142 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1143 | if (pcreg < 0 || regnum != pcreg) | |
1144 | throw_error (NOT_AVAILABLE_ERROR, | |
1145 | _("Registers are not available in btrace record history")); | |
1146 | ||
1147 | cache = *this_cache; | |
1148 | bfun = cache->bfun; | |
1149 | gdb_assert (bfun != NULL); | |
1150 | ||
1151 | caller = bfun->up; | |
1152 | if (caller == NULL) | |
1153 | throw_error (NOT_AVAILABLE_ERROR, | |
1154 | _("No caller in btrace record history")); | |
1155 | ||
1156 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1157 | { | |
1158 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1159 | pc = insn->pc; | |
1160 | } | |
1161 | else | |
1162 | { | |
1163 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1164 | pc = insn->pc; | |
1165 | ||
1166 | pc += gdb_insn_length (gdbarch, pc); | |
1167 | } | |
1168 | ||
1169 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1170 | btrace_get_bfun_name (bfun), bfun->level, | |
1171 | core_addr_to_string_nz (pc)); | |
1172 | ||
1173 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1174 | } |
1175 | ||
1176 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1177 | ||
1178 | static int | |
1179 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1180 | struct frame_info *this_frame, | |
1181 | void **this_cache) | |
1182 | { | |
0b722aec MM |
1183 | const struct btrace_function *bfun; |
1184 | struct btrace_frame_cache *cache; | |
cecac1ab | 1185 | struct thread_info *tp; |
0b722aec | 1186 | struct frame_info *next; |
cecac1ab MM |
1187 | |
1188 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1189 | tp = find_thread_ptid (inferior_ptid); | |
1190 | gdb_assert (tp != NULL); | |
1191 | ||
0b722aec MM |
1192 | bfun = NULL; |
1193 | next = get_next_frame (this_frame); | |
1194 | if (next == NULL) | |
1195 | { | |
1196 | const struct btrace_insn_iterator *replay; | |
1197 | ||
1198 | replay = tp->btrace.replay; | |
1199 | if (replay != NULL) | |
1200 | bfun = replay->function; | |
1201 | } | |
1202 | else | |
1203 | { | |
1204 | const struct btrace_function *callee; | |
1205 | ||
1206 | callee = btrace_get_frame_function (next); | |
1207 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1208 | bfun = callee->up; | |
1209 | } | |
1210 | ||
1211 | if (bfun == NULL) | |
1212 | return 0; | |
1213 | ||
1214 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1215 | btrace_get_bfun_name (bfun), bfun->level); | |
1216 | ||
1217 | /* This is our frame. Initialize the frame cache. */ | |
1218 | cache = bfcache_new (this_frame); | |
1219 | cache->tp = tp; | |
1220 | cache->bfun = bfun; | |
1221 | ||
1222 | *this_cache = cache; | |
1223 | return 1; | |
1224 | } | |
1225 | ||
1226 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1227 | ||
1228 | static int | |
1229 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1230 | struct frame_info *this_frame, | |
1231 | void **this_cache) | |
1232 | { | |
1233 | const struct btrace_function *bfun, *callee; | |
1234 | struct btrace_frame_cache *cache; | |
1235 | struct frame_info *next; | |
1236 | ||
1237 | next = get_next_frame (this_frame); | |
1238 | if (next == NULL) | |
1239 | return 0; | |
1240 | ||
1241 | callee = btrace_get_frame_function (next); | |
1242 | if (callee == NULL) | |
1243 | return 0; | |
1244 | ||
1245 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1246 | return 0; | |
1247 | ||
1248 | bfun = callee->up; | |
1249 | if (bfun == NULL) | |
1250 | return 0; | |
1251 | ||
1252 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1253 | btrace_get_bfun_name (bfun), bfun->level); | |
1254 | ||
1255 | /* This is our frame. Initialize the frame cache. */ | |
1256 | cache = bfcache_new (this_frame); | |
1257 | cache->tp = find_thread_ptid (inferior_ptid); | |
1258 | cache->bfun = bfun; | |
1259 | ||
1260 | *this_cache = cache; | |
1261 | return 1; | |
1262 | } | |
1263 | ||
1264 | static void | |
1265 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1266 | { | |
1267 | struct btrace_frame_cache *cache; | |
1268 | void **slot; | |
1269 | ||
1270 | cache = this_cache; | |
1271 | ||
1272 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1273 | gdb_assert (slot != NULL); | |
1274 | ||
1275 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1276 | } |
1277 | ||
1278 | /* btrace recording does not store previous memory content, neither the stack | |
1279 | frames content. Any unwinding would return errorneous results as the stack | |
1280 | contents no longer matches the changed PC value restored from history. | |
1281 | Therefore this unwinder reports any possibly unwound registers as | |
1282 | <unavailable>. */ | |
1283 | ||
0b722aec | 1284 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1285 | { |
1286 | NORMAL_FRAME, | |
1287 | record_btrace_frame_unwind_stop_reason, | |
1288 | record_btrace_frame_this_id, | |
1289 | record_btrace_frame_prev_register, | |
1290 | NULL, | |
0b722aec MM |
1291 | record_btrace_frame_sniffer, |
1292 | record_btrace_frame_dealloc_cache | |
1293 | }; | |
1294 | ||
1295 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1296 | { | |
1297 | TAILCALL_FRAME, | |
1298 | record_btrace_frame_unwind_stop_reason, | |
1299 | record_btrace_frame_this_id, | |
1300 | record_btrace_frame_prev_register, | |
1301 | NULL, | |
1302 | record_btrace_tailcall_frame_sniffer, | |
1303 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1304 | }; |
b2f4cfde | 1305 | |
52834460 MM |
1306 | /* Indicate that TP should be resumed according to FLAG. */ |
1307 | ||
1308 | static void | |
1309 | record_btrace_resume_thread (struct thread_info *tp, | |
1310 | enum btrace_thread_flag flag) | |
1311 | { | |
1312 | struct btrace_thread_info *btinfo; | |
1313 | ||
1314 | DEBUG ("resuming %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flag); | |
1315 | ||
1316 | btinfo = &tp->btrace; | |
1317 | ||
1318 | if ((btinfo->flags & BTHR_MOVE) != 0) | |
1319 | error (_("Thread already moving.")); | |
1320 | ||
1321 | /* Fetch the latest branch trace. */ | |
1322 | btrace_fetch (tp); | |
1323 | ||
1324 | btinfo->flags |= flag; | |
1325 | } | |
1326 | ||
1327 | /* Find the thread to resume given a PTID. */ | |
1328 | ||
1329 | static struct thread_info * | |
1330 | record_btrace_find_resume_thread (ptid_t ptid) | |
1331 | { | |
1332 | struct thread_info *tp; | |
1333 | ||
1334 | /* When asked to resume everything, we pick the current thread. */ | |
1335 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1336 | ptid = inferior_ptid; | |
1337 | ||
1338 | return find_thread_ptid (ptid); | |
1339 | } | |
1340 | ||
1341 | /* Start replaying a thread. */ | |
1342 | ||
1343 | static struct btrace_insn_iterator * | |
1344 | record_btrace_start_replaying (struct thread_info *tp) | |
1345 | { | |
1346 | volatile struct gdb_exception except; | |
1347 | struct btrace_insn_iterator *replay; | |
1348 | struct btrace_thread_info *btinfo; | |
1349 | int executing; | |
1350 | ||
1351 | btinfo = &tp->btrace; | |
1352 | replay = NULL; | |
1353 | ||
1354 | /* We can't start replaying without trace. */ | |
1355 | if (btinfo->begin == NULL) | |
1356 | return NULL; | |
1357 | ||
1358 | /* Clear the executing flag to allow changes to the current frame. | |
1359 | We are not actually running, yet. We just started a reverse execution | |
1360 | command or a record goto command. | |
1361 | For the latter, EXECUTING is false and this has no effect. | |
1362 | For the former, EXECUTING is true and we're in to_wait, about to | |
1363 | move the thread. Since we need to recompute the stack, we temporarily | |
1364 | set EXECUTING to flase. */ | |
1365 | executing = is_executing (tp->ptid); | |
1366 | set_executing (tp->ptid, 0); | |
1367 | ||
1368 | /* GDB stores the current frame_id when stepping in order to detects steps | |
1369 | into subroutines. | |
1370 | Since frames are computed differently when we're replaying, we need to | |
1371 | recompute those stored frames and fix them up so we can still detect | |
1372 | subroutines after we started replaying. */ | |
1373 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1374 | { | |
1375 | struct frame_info *frame; | |
1376 | struct frame_id frame_id; | |
1377 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1378 | ||
1379 | /* The current frame without replaying - computed via normal unwind. */ | |
1380 | frame = get_current_frame (); | |
1381 | frame_id = get_frame_id (frame); | |
1382 | ||
1383 | /* Check if we need to update any stepping-related frame id's. */ | |
1384 | upd_step_frame_id = frame_id_eq (frame_id, | |
1385 | tp->control.step_frame_id); | |
1386 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1387 | tp->control.step_stack_frame_id); | |
1388 | ||
1389 | /* We start replaying at the end of the branch trace. This corresponds | |
1390 | to the current instruction. */ | |
1391 | replay = xmalloc (sizeof (*replay)); | |
1392 | btrace_insn_end (replay, btinfo); | |
1393 | ||
1394 | /* We're not replaying, yet. */ | |
1395 | gdb_assert (btinfo->replay == NULL); | |
1396 | btinfo->replay = replay; | |
1397 | ||
1398 | /* Make sure we're not using any stale registers. */ | |
1399 | registers_changed_ptid (tp->ptid); | |
1400 | ||
1401 | /* The current frame with replaying - computed via btrace unwind. */ | |
1402 | frame = get_current_frame (); | |
1403 | frame_id = get_frame_id (frame); | |
1404 | ||
1405 | /* Replace stepping related frames where necessary. */ | |
1406 | if (upd_step_frame_id) | |
1407 | tp->control.step_frame_id = frame_id; | |
1408 | if (upd_step_stack_frame_id) | |
1409 | tp->control.step_stack_frame_id = frame_id; | |
1410 | } | |
1411 | ||
1412 | /* Restore the previous execution state. */ | |
1413 | set_executing (tp->ptid, executing); | |
1414 | ||
1415 | if (except.reason < 0) | |
1416 | { | |
1417 | xfree (btinfo->replay); | |
1418 | btinfo->replay = NULL; | |
1419 | ||
1420 | registers_changed_ptid (tp->ptid); | |
1421 | ||
1422 | throw_exception (except); | |
1423 | } | |
1424 | ||
1425 | return replay; | |
1426 | } | |
1427 | ||
1428 | /* Stop replaying a thread. */ | |
1429 | ||
1430 | static void | |
1431 | record_btrace_stop_replaying (struct thread_info *tp) | |
1432 | { | |
1433 | struct btrace_thread_info *btinfo; | |
1434 | ||
1435 | btinfo = &tp->btrace; | |
1436 | ||
1437 | xfree (btinfo->replay); | |
1438 | btinfo->replay = NULL; | |
1439 | ||
1440 | /* Make sure we're not leaving any stale registers. */ | |
1441 | registers_changed_ptid (tp->ptid); | |
1442 | } | |
1443 | ||
b2f4cfde MM |
1444 | /* The to_resume method of target record-btrace. */ |
1445 | ||
1446 | static void | |
1447 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1448 | enum gdb_signal signal) | |
1449 | { | |
52834460 MM |
1450 | struct thread_info *tp, *other; |
1451 | enum btrace_thread_flag flag; | |
1452 | ||
1453 | DEBUG ("resume %s: %s", target_pid_to_str (ptid), step ? "step" : "cont"); | |
1454 | ||
1455 | tp = record_btrace_find_resume_thread (ptid); | |
1456 | if (tp == NULL) | |
1457 | error (_("Cannot find thread to resume.")); | |
1458 | ||
1459 | /* Stop replaying other threads if the thread to resume is not replaying. */ | |
1460 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
1461 | ALL_THREADS (other) | |
1462 | record_btrace_stop_replaying (other); | |
1463 | ||
b2f4cfde | 1464 | /* As long as we're not replaying, just forward the request. */ |
52834460 | 1465 | if (!record_btrace_is_replaying () && execution_direction != EXEC_REVERSE) |
b2f4cfde MM |
1466 | { |
1467 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1468 | if (ops->to_resume != NULL) | |
1469 | return ops->to_resume (ops, ptid, step, signal); | |
1470 | ||
1471 | error (_("Cannot find target for stepping.")); | |
1472 | } | |
1473 | ||
52834460 MM |
1474 | /* Compute the btrace thread flag for the requested move. */ |
1475 | if (step == 0) | |
1476 | flag = execution_direction == EXEC_REVERSE ? BTHR_RCONT : BTHR_CONT; | |
1477 | else | |
1478 | flag = execution_direction == EXEC_REVERSE ? BTHR_RSTEP : BTHR_STEP; | |
1479 | ||
1480 | /* At the moment, we only move a single thread. We could also move | |
1481 | all threads in parallel by single-stepping each resumed thread | |
1482 | until the first runs into an event. | |
1483 | When we do that, we would want to continue all other threads. | |
1484 | For now, just resume one thread to not confuse to_wait. */ | |
1485 | record_btrace_resume_thread (tp, flag); | |
1486 | ||
1487 | /* We just indicate the resume intent here. The actual stepping happens in | |
1488 | record_btrace_wait below. */ | |
1489 | } | |
1490 | ||
1491 | /* Find a thread to move. */ | |
1492 | ||
1493 | static struct thread_info * | |
1494 | record_btrace_find_thread_to_move (ptid_t ptid) | |
1495 | { | |
1496 | struct thread_info *tp; | |
1497 | ||
1498 | /* First check the parameter thread. */ | |
1499 | tp = find_thread_ptid (ptid); | |
1500 | if (tp != NULL && (tp->btrace.flags & BTHR_MOVE) != 0) | |
1501 | return tp; | |
1502 | ||
1503 | /* Otherwise, find one other thread that has been resumed. */ | |
1504 | ALL_THREADS (tp) | |
1505 | if ((tp->btrace.flags & BTHR_MOVE) != 0) | |
1506 | return tp; | |
1507 | ||
1508 | return NULL; | |
1509 | } | |
1510 | ||
1511 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1512 | ||
1513 | static struct target_waitstatus | |
1514 | btrace_step_no_history (void) | |
1515 | { | |
1516 | struct target_waitstatus status; | |
1517 | ||
1518 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1519 | ||
1520 | return status; | |
1521 | } | |
1522 | ||
1523 | /* Return a target_waitstatus indicating that a step finished. */ | |
1524 | ||
1525 | static struct target_waitstatus | |
1526 | btrace_step_stopped (void) | |
1527 | { | |
1528 | struct target_waitstatus status; | |
1529 | ||
1530 | status.kind = TARGET_WAITKIND_STOPPED; | |
1531 | status.value.sig = GDB_SIGNAL_TRAP; | |
1532 | ||
1533 | return status; | |
1534 | } | |
1535 | ||
1536 | /* Clear the record histories. */ | |
1537 | ||
1538 | static void | |
1539 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
1540 | { | |
1541 | xfree (btinfo->insn_history); | |
1542 | xfree (btinfo->call_history); | |
1543 | ||
1544 | btinfo->insn_history = NULL; | |
1545 | btinfo->call_history = NULL; | |
1546 | } | |
1547 | ||
1548 | /* Step a single thread. */ | |
1549 | ||
1550 | static struct target_waitstatus | |
1551 | record_btrace_step_thread (struct thread_info *tp) | |
1552 | { | |
1553 | struct btrace_insn_iterator *replay, end; | |
1554 | struct btrace_thread_info *btinfo; | |
1555 | struct address_space *aspace; | |
1556 | struct inferior *inf; | |
1557 | enum btrace_thread_flag flags; | |
1558 | unsigned int steps; | |
1559 | ||
1560 | btinfo = &tp->btrace; | |
1561 | replay = btinfo->replay; | |
1562 | ||
1563 | flags = btinfo->flags & BTHR_MOVE; | |
1564 | btinfo->flags &= ~BTHR_MOVE; | |
1565 | ||
1566 | DEBUG ("stepping %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flags); | |
1567 | ||
1568 | switch (flags) | |
1569 | { | |
1570 | default: | |
1571 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
1572 | ||
1573 | case BTHR_STEP: | |
1574 | /* We're done if we're not replaying. */ | |
1575 | if (replay == NULL) | |
1576 | return btrace_step_no_history (); | |
1577 | ||
1578 | /* We are always able to step at least once. */ | |
1579 | steps = btrace_insn_next (replay, 1); | |
1580 | gdb_assert (steps == 1); | |
1581 | ||
1582 | /* Determine the end of the instruction trace. */ | |
1583 | btrace_insn_end (&end, btinfo); | |
1584 | ||
1585 | /* We stop replaying if we reached the end of the trace. */ | |
1586 | if (btrace_insn_cmp (replay, &end) == 0) | |
1587 | record_btrace_stop_replaying (tp); | |
1588 | ||
1589 | return btrace_step_stopped (); | |
1590 | ||
1591 | case BTHR_RSTEP: | |
1592 | /* Start replaying if we're not already doing so. */ | |
1593 | if (replay == NULL) | |
1594 | replay = record_btrace_start_replaying (tp); | |
1595 | ||
1596 | /* If we can't step any further, we reached the end of the history. */ | |
1597 | steps = btrace_insn_prev (replay, 1); | |
1598 | if (steps == 0) | |
1599 | return btrace_step_no_history (); | |
1600 | ||
1601 | return btrace_step_stopped (); | |
1602 | ||
1603 | case BTHR_CONT: | |
1604 | /* We're done if we're not replaying. */ | |
1605 | if (replay == NULL) | |
1606 | return btrace_step_no_history (); | |
1607 | ||
1608 | inf = find_inferior_pid (ptid_get_pid (tp->ptid)); | |
1609 | aspace = inf->aspace; | |
1610 | ||
1611 | /* Determine the end of the instruction trace. */ | |
1612 | btrace_insn_end (&end, btinfo); | |
1613 | ||
1614 | for (;;) | |
1615 | { | |
1616 | const struct btrace_insn *insn; | |
1617 | ||
1618 | /* We are always able to step at least once. */ | |
1619 | steps = btrace_insn_next (replay, 1); | |
1620 | gdb_assert (steps == 1); | |
1621 | ||
1622 | /* We stop replaying if we reached the end of the trace. */ | |
1623 | if (btrace_insn_cmp (replay, &end) == 0) | |
1624 | { | |
1625 | record_btrace_stop_replaying (tp); | |
1626 | return btrace_step_no_history (); | |
1627 | } | |
1628 | ||
1629 | insn = btrace_insn_get (replay); | |
1630 | gdb_assert (insn); | |
1631 | ||
1632 | DEBUG ("stepping %d (%s) ... %s", tp->num, | |
1633 | target_pid_to_str (tp->ptid), | |
1634 | core_addr_to_string_nz (insn->pc)); | |
1635 | ||
1636 | if (breakpoint_here_p (aspace, insn->pc)) | |
1637 | return btrace_step_stopped (); | |
1638 | } | |
1639 | ||
1640 | case BTHR_RCONT: | |
1641 | /* Start replaying if we're not already doing so. */ | |
1642 | if (replay == NULL) | |
1643 | replay = record_btrace_start_replaying (tp); | |
1644 | ||
1645 | inf = find_inferior_pid (ptid_get_pid (tp->ptid)); | |
1646 | aspace = inf->aspace; | |
1647 | ||
1648 | for (;;) | |
1649 | { | |
1650 | const struct btrace_insn *insn; | |
1651 | ||
1652 | /* If we can't step any further, we're done. */ | |
1653 | steps = btrace_insn_prev (replay, 1); | |
1654 | if (steps == 0) | |
1655 | return btrace_step_no_history (); | |
1656 | ||
1657 | insn = btrace_insn_get (replay); | |
1658 | gdb_assert (insn); | |
1659 | ||
1660 | DEBUG ("reverse-stepping %d (%s) ... %s", tp->num, | |
1661 | target_pid_to_str (tp->ptid), | |
1662 | core_addr_to_string_nz (insn->pc)); | |
1663 | ||
1664 | if (breakpoint_here_p (aspace, insn->pc)) | |
1665 | return btrace_step_stopped (); | |
1666 | } | |
1667 | } | |
b2f4cfde MM |
1668 | } |
1669 | ||
1670 | /* The to_wait method of target record-btrace. */ | |
1671 | ||
1672 | static ptid_t | |
1673 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
1674 | struct target_waitstatus *status, int options) | |
1675 | { | |
52834460 MM |
1676 | struct thread_info *tp, *other; |
1677 | ||
1678 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
1679 | ||
b2f4cfde | 1680 | /* As long as we're not replaying, just forward the request. */ |
52834460 | 1681 | if (!record_btrace_is_replaying () && execution_direction != EXEC_REVERSE) |
b2f4cfde MM |
1682 | { |
1683 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1684 | if (ops->to_wait != NULL) | |
1685 | return ops->to_wait (ops, ptid, status, options); | |
1686 | ||
1687 | error (_("Cannot find target for waiting.")); | |
1688 | } | |
1689 | ||
52834460 MM |
1690 | /* Let's find a thread to move. */ |
1691 | tp = record_btrace_find_thread_to_move (ptid); | |
1692 | if (tp == NULL) | |
1693 | { | |
1694 | DEBUG ("wait %s: no thread", target_pid_to_str (ptid)); | |
1695 | ||
1696 | status->kind = TARGET_WAITKIND_IGNORE; | |
1697 | return minus_one_ptid; | |
1698 | } | |
1699 | ||
1700 | /* We only move a single thread. We're not able to correlate threads. */ | |
1701 | *status = record_btrace_step_thread (tp); | |
1702 | ||
1703 | /* Stop all other threads. */ | |
1704 | if (!non_stop) | |
1705 | ALL_THREADS (other) | |
1706 | other->btrace.flags &= ~BTHR_MOVE; | |
1707 | ||
1708 | /* Start record histories anew from the current position. */ | |
1709 | record_btrace_clear_histories (&tp->btrace); | |
1710 | ||
1711 | /* We moved the replay position but did not update registers. */ | |
1712 | registers_changed_ptid (tp->ptid); | |
1713 | ||
1714 | return tp->ptid; | |
1715 | } | |
1716 | ||
1717 | /* The to_can_execute_reverse method of target record-btrace. */ | |
1718 | ||
1719 | static int | |
1720 | record_btrace_can_execute_reverse (void) | |
1721 | { | |
1722 | return 1; | |
1723 | } | |
1724 | ||
1725 | /* The to_decr_pc_after_break method of target record-btrace. */ | |
1726 | ||
1727 | static CORE_ADDR | |
1728 | record_btrace_decr_pc_after_break (struct target_ops *ops, | |
1729 | struct gdbarch *gdbarch) | |
1730 | { | |
1731 | /* When replaying, we do not actually execute the breakpoint instruction | |
1732 | so there is no need to adjust the PC after hitting a breakpoint. */ | |
1733 | if (record_btrace_is_replaying ()) | |
1734 | return 0; | |
1735 | ||
1736 | return forward_target_decr_pc_after_break (ops->beneath, gdbarch); | |
b2f4cfde MM |
1737 | } |
1738 | ||
e2887aa3 MM |
1739 | /* The to_find_new_threads method of target record-btrace. */ |
1740 | ||
1741 | static void | |
1742 | record_btrace_find_new_threads (struct target_ops *ops) | |
1743 | { | |
1744 | /* Don't expect new threads if we're replaying. */ | |
1745 | if (record_btrace_is_replaying ()) | |
1746 | return; | |
1747 | ||
1748 | /* Forward the request. */ | |
1749 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1750 | if (ops->to_find_new_threads != NULL) | |
1751 | { | |
1752 | ops->to_find_new_threads (ops); | |
1753 | break; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | /* The to_thread_alive method of target record-btrace. */ | |
1758 | ||
1759 | static int | |
1760 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
1761 | { | |
1762 | /* We don't add or remove threads during replay. */ | |
1763 | if (record_btrace_is_replaying ()) | |
1764 | return find_thread_ptid (ptid) != NULL; | |
1765 | ||
1766 | /* Forward the request. */ | |
1767 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1768 | if (ops->to_thread_alive != NULL) | |
1769 | return ops->to_thread_alive (ops, ptid); | |
1770 | ||
1771 | return 0; | |
1772 | } | |
1773 | ||
066ce621 MM |
1774 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
1775 | is stopped. */ | |
1776 | ||
1777 | static void | |
1778 | record_btrace_set_replay (struct thread_info *tp, | |
1779 | const struct btrace_insn_iterator *it) | |
1780 | { | |
1781 | struct btrace_thread_info *btinfo; | |
1782 | ||
1783 | btinfo = &tp->btrace; | |
1784 | ||
1785 | if (it == NULL || it->function == NULL) | |
52834460 | 1786 | record_btrace_stop_replaying (tp); |
066ce621 MM |
1787 | else |
1788 | { | |
1789 | if (btinfo->replay == NULL) | |
52834460 | 1790 | record_btrace_start_replaying (tp); |
066ce621 MM |
1791 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
1792 | return; | |
1793 | ||
1794 | *btinfo->replay = *it; | |
52834460 | 1795 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
1796 | } |
1797 | ||
52834460 MM |
1798 | /* Start anew from the new replay position. */ |
1799 | record_btrace_clear_histories (btinfo); | |
066ce621 MM |
1800 | } |
1801 | ||
1802 | /* The to_goto_record_begin method of target record-btrace. */ | |
1803 | ||
1804 | static void | |
1805 | record_btrace_goto_begin (void) | |
1806 | { | |
1807 | struct thread_info *tp; | |
1808 | struct btrace_insn_iterator begin; | |
1809 | ||
1810 | tp = require_btrace_thread (); | |
1811 | ||
1812 | btrace_insn_begin (&begin, &tp->btrace); | |
1813 | record_btrace_set_replay (tp, &begin); | |
1814 | ||
1815 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1816 | } | |
1817 | ||
1818 | /* The to_goto_record_end method of target record-btrace. */ | |
1819 | ||
1820 | static void | |
1821 | record_btrace_goto_end (void) | |
1822 | { | |
1823 | struct thread_info *tp; | |
1824 | ||
1825 | tp = require_btrace_thread (); | |
1826 | ||
1827 | record_btrace_set_replay (tp, NULL); | |
1828 | ||
1829 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1830 | } | |
1831 | ||
1832 | /* The to_goto_record method of target record-btrace. */ | |
1833 | ||
1834 | static void | |
1835 | record_btrace_goto (ULONGEST insn) | |
1836 | { | |
1837 | struct thread_info *tp; | |
1838 | struct btrace_insn_iterator it; | |
1839 | unsigned int number; | |
1840 | int found; | |
1841 | ||
1842 | number = insn; | |
1843 | ||
1844 | /* Check for wrap-arounds. */ | |
1845 | if (number != insn) | |
1846 | error (_("Instruction number out of range.")); | |
1847 | ||
1848 | tp = require_btrace_thread (); | |
1849 | ||
1850 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
1851 | if (found == 0) | |
1852 | error (_("No such instruction.")); | |
1853 | ||
1854 | record_btrace_set_replay (tp, &it); | |
1855 | ||
1856 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1857 | } | |
1858 | ||
afedecd3 MM |
1859 | /* Initialize the record-btrace target ops. */ |
1860 | ||
1861 | static void | |
1862 | init_record_btrace_ops (void) | |
1863 | { | |
1864 | struct target_ops *ops; | |
1865 | ||
1866 | ops = &record_btrace_ops; | |
1867 | ops->to_shortname = "record-btrace"; | |
1868 | ops->to_longname = "Branch tracing target"; | |
1869 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
1870 | ops->to_open = record_btrace_open; | |
1871 | ops->to_close = record_btrace_close; | |
1872 | ops->to_detach = record_detach; | |
1873 | ops->to_disconnect = record_disconnect; | |
1874 | ops->to_mourn_inferior = record_mourn_inferior; | |
1875 | ops->to_kill = record_kill; | |
1876 | ops->to_create_inferior = find_default_create_inferior; | |
1877 | ops->to_stop_recording = record_btrace_stop_recording; | |
1878 | ops->to_info_record = record_btrace_info; | |
1879 | ops->to_insn_history = record_btrace_insn_history; | |
1880 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
1881 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
1882 | ops->to_call_history = record_btrace_call_history; | |
1883 | ops->to_call_history_from = record_btrace_call_history_from; | |
1884 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 1885 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
1886 | ops->to_xfer_partial = record_btrace_xfer_partial; |
1887 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
1888 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
1889 | ops->to_fetch_registers = record_btrace_fetch_registers; |
1890 | ops->to_store_registers = record_btrace_store_registers; | |
1891 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
cecac1ab | 1892 | ops->to_get_unwinder = &record_btrace_frame_unwind; |
0b722aec | 1893 | ops->to_get_tailcall_unwinder = &record_btrace_tailcall_frame_unwind; |
b2f4cfde MM |
1894 | ops->to_resume = record_btrace_resume; |
1895 | ops->to_wait = record_btrace_wait; | |
e2887aa3 MM |
1896 | ops->to_find_new_threads = record_btrace_find_new_threads; |
1897 | ops->to_thread_alive = record_btrace_thread_alive; | |
066ce621 MM |
1898 | ops->to_goto_record_begin = record_btrace_goto_begin; |
1899 | ops->to_goto_record_end = record_btrace_goto_end; | |
1900 | ops->to_goto_record = record_btrace_goto; | |
52834460 MM |
1901 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
1902 | ops->to_decr_pc_after_break = record_btrace_decr_pc_after_break; | |
afedecd3 MM |
1903 | ops->to_stratum = record_stratum; |
1904 | ops->to_magic = OPS_MAGIC; | |
1905 | } | |
1906 | ||
1907 | /* Alias for "target record". */ | |
1908 | ||
1909 | static void | |
1910 | cmd_record_btrace_start (char *args, int from_tty) | |
1911 | { | |
1912 | if (args != NULL && *args != 0) | |
1913 | error (_("Invalid argument.")); | |
1914 | ||
1915 | execute_command ("target record-btrace", from_tty); | |
1916 | } | |
1917 | ||
1918 | void _initialize_record_btrace (void); | |
1919 | ||
1920 | /* Initialize btrace commands. */ | |
1921 | ||
1922 | void | |
1923 | _initialize_record_btrace (void) | |
1924 | { | |
1925 | add_cmd ("btrace", class_obscure, cmd_record_btrace_start, | |
1926 | _("Start branch trace recording."), | |
1927 | &record_cmdlist); | |
1928 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); | |
1929 | ||
1930 | init_record_btrace_ops (); | |
1931 | add_target (&record_btrace_ops); | |
0b722aec MM |
1932 | |
1933 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
1934 | xcalloc, xfree); | |
afedecd3 | 1935 | } |