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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 | |
c6cd7c02 | 198 | record_btrace_stop_recording (struct target_ops *self) |
afedecd3 MM |
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 | |
de90e03d | 214 | record_btrace_close (struct target_ops *self) |
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 | |
630d6a4a | 231 | record_btrace_info (struct target_ops *self) |
afedecd3 MM |
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 | |
7a6c5609 | 315 | record_btrace_insn_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
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 | |
4e99c6b7 TT |
401 | record_btrace_insn_history_range (struct target_ops *self, |
402 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
403 | { |
404 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
405 | struct btrace_insn_history *history; |
406 | struct btrace_insn_iterator begin, end; | |
afedecd3 MM |
407 | struct cleanup *uiout_cleanup; |
408 | struct ui_out *uiout; | |
23a7fe75 MM |
409 | unsigned int low, high; |
410 | int found; | |
afedecd3 MM |
411 | |
412 | uiout = current_uiout; | |
413 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
414 | "insn history"); | |
23a7fe75 MM |
415 | low = from; |
416 | high = to; | |
afedecd3 | 417 | |
23a7fe75 | 418 | DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
419 | |
420 | /* Check for wrap-arounds. */ | |
23a7fe75 | 421 | if (low != from || high != to) |
afedecd3 MM |
422 | error (_("Bad range.")); |
423 | ||
0688d04e | 424 | if (high < low) |
afedecd3 MM |
425 | error (_("Bad range.")); |
426 | ||
23a7fe75 | 427 | btinfo = require_btrace (); |
afedecd3 | 428 | |
23a7fe75 MM |
429 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
430 | if (found == 0) | |
431 | error (_("Range out of bounds.")); | |
afedecd3 | 432 | |
23a7fe75 MM |
433 | found = btrace_find_insn_by_number (&end, btinfo, high); |
434 | if (found == 0) | |
0688d04e MM |
435 | { |
436 | /* Silently truncate the range. */ | |
437 | btrace_insn_end (&end, btinfo); | |
438 | } | |
439 | else | |
440 | { | |
441 | /* We want both begin and end to be inclusive. */ | |
442 | btrace_insn_next (&end, 1); | |
443 | } | |
afedecd3 | 444 | |
23a7fe75 MM |
445 | btrace_insn_history (uiout, &begin, &end, flags); |
446 | btrace_set_insn_history (btinfo, &begin, &end); | |
afedecd3 MM |
447 | |
448 | do_cleanups (uiout_cleanup); | |
449 | } | |
450 | ||
451 | /* The to_insn_history_from method of target record-btrace. */ | |
452 | ||
453 | static void | |
9abc3ff3 TT |
454 | record_btrace_insn_history_from (struct target_ops *self, |
455 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
456 | { |
457 | ULONGEST begin, end, context; | |
458 | ||
459 | context = abs (size); | |
0688d04e MM |
460 | if (context == 0) |
461 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
462 | |
463 | if (size < 0) | |
464 | { | |
465 | end = from; | |
466 | ||
467 | if (from < context) | |
468 | begin = 0; | |
469 | else | |
0688d04e | 470 | begin = from - context + 1; |
afedecd3 MM |
471 | } |
472 | else | |
473 | { | |
474 | begin = from; | |
0688d04e | 475 | end = from + context - 1; |
afedecd3 MM |
476 | |
477 | /* Check for wrap-around. */ | |
478 | if (end < begin) | |
479 | end = ULONGEST_MAX; | |
480 | } | |
481 | ||
4e99c6b7 | 482 | record_btrace_insn_history_range (self, begin, end, flags); |
afedecd3 MM |
483 | } |
484 | ||
485 | /* Print the instruction number range for a function call history line. */ | |
486 | ||
487 | static void | |
23a7fe75 MM |
488 | btrace_call_history_insn_range (struct ui_out *uiout, |
489 | const struct btrace_function *bfun) | |
afedecd3 | 490 | { |
7acbe133 MM |
491 | unsigned int begin, end, size; |
492 | ||
493 | size = VEC_length (btrace_insn_s, bfun->insn); | |
494 | gdb_assert (size > 0); | |
afedecd3 | 495 | |
23a7fe75 | 496 | begin = bfun->insn_offset; |
7acbe133 | 497 | end = begin + size - 1; |
afedecd3 | 498 | |
23a7fe75 | 499 | ui_out_field_uint (uiout, "insn begin", begin); |
8710b709 | 500 | ui_out_text (uiout, ","); |
23a7fe75 | 501 | ui_out_field_uint (uiout, "insn end", end); |
afedecd3 MM |
502 | } |
503 | ||
504 | /* Print the source line information for a function call history line. */ | |
505 | ||
506 | static void | |
23a7fe75 MM |
507 | btrace_call_history_src_line (struct ui_out *uiout, |
508 | const struct btrace_function *bfun) | |
afedecd3 MM |
509 | { |
510 | struct symbol *sym; | |
23a7fe75 | 511 | int begin, end; |
afedecd3 MM |
512 | |
513 | sym = bfun->sym; | |
514 | if (sym == NULL) | |
515 | return; | |
516 | ||
517 | ui_out_field_string (uiout, "file", | |
518 | symtab_to_filename_for_display (sym->symtab)); | |
519 | ||
23a7fe75 MM |
520 | begin = bfun->lbegin; |
521 | end = bfun->lend; | |
522 | ||
523 | if (end < begin) | |
afedecd3 MM |
524 | return; |
525 | ||
526 | ui_out_text (uiout, ":"); | |
23a7fe75 | 527 | ui_out_field_int (uiout, "min line", begin); |
afedecd3 | 528 | |
23a7fe75 | 529 | if (end == begin) |
afedecd3 MM |
530 | return; |
531 | ||
8710b709 | 532 | ui_out_text (uiout, ","); |
23a7fe75 | 533 | ui_out_field_int (uiout, "max line", end); |
afedecd3 MM |
534 | } |
535 | ||
0b722aec MM |
536 | /* Get the name of a branch trace function. */ |
537 | ||
538 | static const char * | |
539 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
540 | { | |
541 | struct minimal_symbol *msym; | |
542 | struct symbol *sym; | |
543 | ||
544 | if (bfun == NULL) | |
545 | return "??"; | |
546 | ||
547 | msym = bfun->msym; | |
548 | sym = bfun->sym; | |
549 | ||
550 | if (sym != NULL) | |
551 | return SYMBOL_PRINT_NAME (sym); | |
552 | else if (msym != NULL) | |
efd66ac6 | 553 | return MSYMBOL_PRINT_NAME (msym); |
0b722aec MM |
554 | else |
555 | return "??"; | |
556 | } | |
557 | ||
afedecd3 MM |
558 | /* Disassemble a section of the recorded function trace. */ |
559 | ||
560 | static void | |
23a7fe75 | 561 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 562 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
563 | const struct btrace_call_iterator *begin, |
564 | const struct btrace_call_iterator *end, | |
afedecd3 MM |
565 | enum record_print_flag flags) |
566 | { | |
23a7fe75 | 567 | struct btrace_call_iterator it; |
afedecd3 | 568 | |
23a7fe75 MM |
569 | DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin), |
570 | btrace_call_number (end)); | |
afedecd3 | 571 | |
23a7fe75 | 572 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 573 | { |
23a7fe75 MM |
574 | const struct btrace_function *bfun; |
575 | struct minimal_symbol *msym; | |
576 | struct symbol *sym; | |
577 | ||
578 | bfun = btrace_call_get (&it); | |
23a7fe75 | 579 | sym = bfun->sym; |
0b722aec | 580 | msym = bfun->msym; |
23a7fe75 | 581 | |
afedecd3 | 582 | /* Print the function index. */ |
23a7fe75 | 583 | ui_out_field_uint (uiout, "index", bfun->number); |
afedecd3 MM |
584 | ui_out_text (uiout, "\t"); |
585 | ||
8710b709 MM |
586 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
587 | { | |
588 | int level = bfun->level + btinfo->level, i; | |
589 | ||
590 | for (i = 0; i < level; ++i) | |
591 | ui_out_text (uiout, " "); | |
592 | } | |
593 | ||
594 | if (sym != NULL) | |
595 | ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym)); | |
596 | else if (msym != NULL) | |
efd66ac6 | 597 | ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym)); |
8710b709 MM |
598 | else if (!ui_out_is_mi_like_p (uiout)) |
599 | ui_out_field_string (uiout, "function", "??"); | |
600 | ||
1e038f67 | 601 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 602 | { |
8710b709 | 603 | ui_out_text (uiout, _("\tinst ")); |
23a7fe75 | 604 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
605 | } |
606 | ||
1e038f67 | 607 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 608 | { |
8710b709 | 609 | ui_out_text (uiout, _("\tat ")); |
23a7fe75 | 610 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
611 | } |
612 | ||
afedecd3 MM |
613 | ui_out_text (uiout, "\n"); |
614 | } | |
615 | } | |
616 | ||
617 | /* The to_call_history method of target record-btrace. */ | |
618 | ||
619 | static void | |
5df2fcba | 620 | record_btrace_call_history (struct target_ops *self, int size, int flags) |
afedecd3 MM |
621 | { |
622 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
623 | struct btrace_call_history *history; |
624 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
625 | struct cleanup *uiout_cleanup; |
626 | struct ui_out *uiout; | |
23a7fe75 | 627 | unsigned int context, covered; |
afedecd3 MM |
628 | |
629 | uiout = current_uiout; | |
630 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
631 | "insn history"); | |
afedecd3 | 632 | context = abs (size); |
afedecd3 MM |
633 | if (context == 0) |
634 | error (_("Bad record function-call-history-size.")); | |
635 | ||
23a7fe75 MM |
636 | btinfo = require_btrace (); |
637 | history = btinfo->call_history; | |
638 | if (history == NULL) | |
afedecd3 | 639 | { |
07bbe694 | 640 | struct btrace_insn_iterator *replay; |
afedecd3 | 641 | |
23a7fe75 | 642 | DEBUG ("call-history (0x%x): %d", flags, size); |
afedecd3 | 643 | |
07bbe694 MM |
644 | /* If we're replaying, we start at the replay position. Otherwise, we |
645 | start at the tail of the trace. */ | |
646 | replay = btinfo->replay; | |
647 | if (replay != NULL) | |
648 | { | |
649 | begin.function = replay->function; | |
650 | begin.btinfo = btinfo; | |
651 | } | |
652 | else | |
653 | btrace_call_end (&begin, btinfo); | |
654 | ||
655 | /* We start from here and expand in the requested direction. Then we | |
656 | expand in the other direction, as well, to fill up any remaining | |
657 | context. */ | |
658 | end = begin; | |
659 | if (size < 0) | |
660 | { | |
661 | /* We want the current position covered, as well. */ | |
662 | covered = btrace_call_next (&end, 1); | |
663 | covered += btrace_call_prev (&begin, context - covered); | |
664 | covered += btrace_call_next (&end, context - covered); | |
665 | } | |
666 | else | |
667 | { | |
668 | covered = btrace_call_next (&end, context); | |
669 | covered += btrace_call_prev (&begin, context- covered); | |
670 | } | |
afedecd3 MM |
671 | } |
672 | else | |
673 | { | |
23a7fe75 MM |
674 | begin = history->begin; |
675 | end = history->end; | |
afedecd3 | 676 | |
23a7fe75 MM |
677 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size, |
678 | btrace_call_number (&begin), btrace_call_number (&end)); | |
afedecd3 | 679 | |
23a7fe75 MM |
680 | if (size < 0) |
681 | { | |
682 | end = begin; | |
683 | covered = btrace_call_prev (&begin, context); | |
684 | } | |
685 | else | |
686 | { | |
687 | begin = end; | |
688 | covered = btrace_call_next (&end, context); | |
689 | } | |
afedecd3 MM |
690 | } |
691 | ||
23a7fe75 | 692 | if (covered > 0) |
8710b709 | 693 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
694 | else |
695 | { | |
696 | if (size < 0) | |
697 | printf_unfiltered (_("At the start of the branch trace record.\n")); | |
698 | else | |
699 | printf_unfiltered (_("At the end of the branch trace record.\n")); | |
700 | } | |
afedecd3 | 701 | |
23a7fe75 | 702 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
703 | do_cleanups (uiout_cleanup); |
704 | } | |
705 | ||
706 | /* The to_call_history_range method of target record-btrace. */ | |
707 | ||
708 | static void | |
f0d960ea TT |
709 | record_btrace_call_history_range (struct target_ops *self, |
710 | ULONGEST from, ULONGEST to, int flags) | |
afedecd3 MM |
711 | { |
712 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
713 | struct btrace_call_history *history; |
714 | struct btrace_call_iterator begin, end; | |
afedecd3 MM |
715 | struct cleanup *uiout_cleanup; |
716 | struct ui_out *uiout; | |
23a7fe75 MM |
717 | unsigned int low, high; |
718 | int found; | |
afedecd3 MM |
719 | |
720 | uiout = current_uiout; | |
721 | uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, | |
722 | "func history"); | |
23a7fe75 MM |
723 | low = from; |
724 | high = to; | |
afedecd3 | 725 | |
23a7fe75 | 726 | DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high); |
afedecd3 MM |
727 | |
728 | /* Check for wrap-arounds. */ | |
23a7fe75 | 729 | if (low != from || high != to) |
afedecd3 MM |
730 | error (_("Bad range.")); |
731 | ||
0688d04e | 732 | if (high < low) |
afedecd3 MM |
733 | error (_("Bad range.")); |
734 | ||
23a7fe75 | 735 | btinfo = require_btrace (); |
afedecd3 | 736 | |
23a7fe75 MM |
737 | found = btrace_find_call_by_number (&begin, btinfo, low); |
738 | if (found == 0) | |
739 | error (_("Range out of bounds.")); | |
afedecd3 | 740 | |
23a7fe75 MM |
741 | found = btrace_find_call_by_number (&end, btinfo, high); |
742 | if (found == 0) | |
0688d04e MM |
743 | { |
744 | /* Silently truncate the range. */ | |
745 | btrace_call_end (&end, btinfo); | |
746 | } | |
747 | else | |
748 | { | |
749 | /* We want both begin and end to be inclusive. */ | |
750 | btrace_call_next (&end, 1); | |
751 | } | |
afedecd3 | 752 | |
8710b709 | 753 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 754 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
755 | |
756 | do_cleanups (uiout_cleanup); | |
757 | } | |
758 | ||
759 | /* The to_call_history_from method of target record-btrace. */ | |
760 | ||
761 | static void | |
ec0aea04 TT |
762 | record_btrace_call_history_from (struct target_ops *self, |
763 | ULONGEST from, int size, int flags) | |
afedecd3 MM |
764 | { |
765 | ULONGEST begin, end, context; | |
766 | ||
767 | context = abs (size); | |
0688d04e MM |
768 | if (context == 0) |
769 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
770 | |
771 | if (size < 0) | |
772 | { | |
773 | end = from; | |
774 | ||
775 | if (from < context) | |
776 | begin = 0; | |
777 | else | |
0688d04e | 778 | begin = from - context + 1; |
afedecd3 MM |
779 | } |
780 | else | |
781 | { | |
782 | begin = from; | |
0688d04e | 783 | end = from + context - 1; |
afedecd3 MM |
784 | |
785 | /* Check for wrap-around. */ | |
786 | if (end < begin) | |
787 | end = ULONGEST_MAX; | |
788 | } | |
789 | ||
f0d960ea | 790 | record_btrace_call_history_range (self, begin, end, flags); |
afedecd3 MM |
791 | } |
792 | ||
07bbe694 MM |
793 | /* The to_record_is_replaying method of target record-btrace. */ |
794 | ||
795 | static int | |
1c63c994 | 796 | record_btrace_is_replaying (struct target_ops *self) |
07bbe694 MM |
797 | { |
798 | struct thread_info *tp; | |
799 | ||
800 | ALL_THREADS (tp) | |
801 | if (btrace_is_replaying (tp)) | |
802 | return 1; | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
633785ff MM |
807 | /* The to_xfer_partial method of target record-btrace. */ |
808 | ||
9b409511 | 809 | static enum target_xfer_status |
633785ff MM |
810 | record_btrace_xfer_partial (struct target_ops *ops, enum target_object object, |
811 | const char *annex, gdb_byte *readbuf, | |
812 | const gdb_byte *writebuf, ULONGEST offset, | |
9b409511 | 813 | ULONGEST len, ULONGEST *xfered_len) |
633785ff MM |
814 | { |
815 | struct target_ops *t; | |
816 | ||
817 | /* Filter out requests that don't make sense during replay. */ | |
1c63c994 | 818 | if (!record_btrace_allow_memory_access && record_btrace_is_replaying (ops)) |
633785ff MM |
819 | { |
820 | switch (object) | |
821 | { | |
822 | case TARGET_OBJECT_MEMORY: | |
823 | { | |
824 | struct target_section *section; | |
825 | ||
826 | /* We do not allow writing memory in general. */ | |
827 | if (writebuf != NULL) | |
9b409511 YQ |
828 | { |
829 | *xfered_len = len; | |
bc113b4e | 830 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 831 | } |
633785ff MM |
832 | |
833 | /* We allow reading readonly memory. */ | |
834 | section = target_section_by_addr (ops, offset); | |
835 | if (section != NULL) | |
836 | { | |
837 | /* Check if the section we found is readonly. */ | |
838 | if ((bfd_get_section_flags (section->the_bfd_section->owner, | |
839 | section->the_bfd_section) | |
840 | & SEC_READONLY) != 0) | |
841 | { | |
842 | /* Truncate the request to fit into this section. */ | |
843 | len = min (len, section->endaddr - offset); | |
844 | break; | |
845 | } | |
846 | } | |
847 | ||
9b409511 | 848 | *xfered_len = len; |
bc113b4e | 849 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
850 | } |
851 | } | |
852 | } | |
853 | ||
854 | /* Forward the request. */ | |
855 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
856 | if (ops->to_xfer_partial != NULL) | |
857 | return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, | |
9b409511 | 858 | offset, len, xfered_len); |
633785ff | 859 | |
9b409511 | 860 | *xfered_len = len; |
bc113b4e | 861 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
862 | } |
863 | ||
864 | /* The to_insert_breakpoint method of target record-btrace. */ | |
865 | ||
866 | static int | |
867 | record_btrace_insert_breakpoint (struct target_ops *ops, | |
868 | struct gdbarch *gdbarch, | |
869 | struct bp_target_info *bp_tgt) | |
870 | { | |
871 | volatile struct gdb_exception except; | |
872 | int old, ret; | |
873 | ||
874 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
875 | duration of this function. */ | |
876 | old = record_btrace_allow_memory_access; | |
877 | record_btrace_allow_memory_access = 1; | |
878 | ||
879 | ret = 0; | |
880 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 881 | ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff MM |
882 | |
883 | record_btrace_allow_memory_access = old; | |
884 | ||
885 | if (except.reason < 0) | |
886 | throw_exception (except); | |
887 | ||
888 | return ret; | |
889 | } | |
890 | ||
891 | /* The to_remove_breakpoint method of target record-btrace. */ | |
892 | ||
893 | static int | |
894 | record_btrace_remove_breakpoint (struct target_ops *ops, | |
895 | struct gdbarch *gdbarch, | |
896 | struct bp_target_info *bp_tgt) | |
897 | { | |
898 | volatile struct gdb_exception except; | |
899 | int old, ret; | |
900 | ||
901 | /* Removing breakpoints requires accessing memory. Allow it for the | |
902 | duration of this function. */ | |
903 | old = record_btrace_allow_memory_access; | |
904 | record_btrace_allow_memory_access = 1; | |
905 | ||
906 | ret = 0; | |
907 | TRY_CATCH (except, RETURN_MASK_ALL) | |
6b84065d | 908 | ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt); |
633785ff MM |
909 | |
910 | record_btrace_allow_memory_access = old; | |
911 | ||
912 | if (except.reason < 0) | |
913 | throw_exception (except); | |
914 | ||
915 | return ret; | |
916 | } | |
917 | ||
1f3ef581 MM |
918 | /* The to_fetch_registers method of target record-btrace. */ |
919 | ||
920 | static void | |
921 | record_btrace_fetch_registers (struct target_ops *ops, | |
922 | struct regcache *regcache, int regno) | |
923 | { | |
924 | struct btrace_insn_iterator *replay; | |
925 | struct thread_info *tp; | |
926 | ||
927 | tp = find_thread_ptid (inferior_ptid); | |
928 | gdb_assert (tp != NULL); | |
929 | ||
930 | replay = tp->btrace.replay; | |
931 | if (replay != NULL) | |
932 | { | |
933 | const struct btrace_insn *insn; | |
934 | struct gdbarch *gdbarch; | |
935 | int pcreg; | |
936 | ||
937 | gdbarch = get_regcache_arch (regcache); | |
938 | pcreg = gdbarch_pc_regnum (gdbarch); | |
939 | if (pcreg < 0) | |
940 | return; | |
941 | ||
942 | /* We can only provide the PC register. */ | |
943 | if (regno >= 0 && regno != pcreg) | |
944 | return; | |
945 | ||
946 | insn = btrace_insn_get (replay); | |
947 | gdb_assert (insn != NULL); | |
948 | ||
949 | regcache_raw_supply (regcache, regno, &insn->pc); | |
950 | } | |
951 | else | |
952 | { | |
953 | struct target_ops *t; | |
954 | ||
955 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
956 | if (t->to_fetch_registers != NULL) | |
957 | { | |
958 | t->to_fetch_registers (t, regcache, regno); | |
959 | break; | |
960 | } | |
961 | } | |
962 | } | |
963 | ||
964 | /* The to_store_registers method of target record-btrace. */ | |
965 | ||
966 | static void | |
967 | record_btrace_store_registers (struct target_ops *ops, | |
968 | struct regcache *regcache, int regno) | |
969 | { | |
970 | struct target_ops *t; | |
971 | ||
1c63c994 | 972 | if (record_btrace_is_replaying (ops)) |
1f3ef581 MM |
973 | error (_("This record target does not allow writing registers.")); |
974 | ||
975 | gdb_assert (may_write_registers != 0); | |
976 | ||
977 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
978 | if (t->to_store_registers != NULL) | |
979 | { | |
980 | t->to_store_registers (t, regcache, regno); | |
981 | return; | |
982 | } | |
983 | ||
984 | noprocess (); | |
985 | } | |
986 | ||
987 | /* The to_prepare_to_store method of target record-btrace. */ | |
988 | ||
989 | static void | |
990 | record_btrace_prepare_to_store (struct target_ops *ops, | |
991 | struct regcache *regcache) | |
992 | { | |
993 | struct target_ops *t; | |
994 | ||
1c63c994 | 995 | if (record_btrace_is_replaying (ops)) |
1f3ef581 MM |
996 | return; |
997 | ||
998 | for (t = ops->beneath; t != NULL; t = t->beneath) | |
999 | if (t->to_prepare_to_store != NULL) | |
1000 | { | |
1001 | t->to_prepare_to_store (t, regcache); | |
1002 | return; | |
1003 | } | |
1004 | } | |
1005 | ||
0b722aec MM |
1006 | /* The branch trace frame cache. */ |
1007 | ||
1008 | struct btrace_frame_cache | |
1009 | { | |
1010 | /* The thread. */ | |
1011 | struct thread_info *tp; | |
1012 | ||
1013 | /* The frame info. */ | |
1014 | struct frame_info *frame; | |
1015 | ||
1016 | /* The branch trace function segment. */ | |
1017 | const struct btrace_function *bfun; | |
1018 | }; | |
1019 | ||
1020 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1021 | ||
1022 | static htab_t bfcache; | |
1023 | ||
1024 | /* hash_f for htab_create_alloc of bfcache. */ | |
1025 | ||
1026 | static hashval_t | |
1027 | bfcache_hash (const void *arg) | |
1028 | { | |
1029 | const struct btrace_frame_cache *cache = arg; | |
1030 | ||
1031 | return htab_hash_pointer (cache->frame); | |
1032 | } | |
1033 | ||
1034 | /* eq_f for htab_create_alloc of bfcache. */ | |
1035 | ||
1036 | static int | |
1037 | bfcache_eq (const void *arg1, const void *arg2) | |
1038 | { | |
1039 | const struct btrace_frame_cache *cache1 = arg1; | |
1040 | const struct btrace_frame_cache *cache2 = arg2; | |
1041 | ||
1042 | return cache1->frame == cache2->frame; | |
1043 | } | |
1044 | ||
1045 | /* Create a new btrace frame cache. */ | |
1046 | ||
1047 | static struct btrace_frame_cache * | |
1048 | bfcache_new (struct frame_info *frame) | |
1049 | { | |
1050 | struct btrace_frame_cache *cache; | |
1051 | void **slot; | |
1052 | ||
1053 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
1054 | cache->frame = frame; | |
1055 | ||
1056 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1057 | gdb_assert (*slot == NULL); | |
1058 | *slot = cache; | |
1059 | ||
1060 | return cache; | |
1061 | } | |
1062 | ||
1063 | /* Extract the branch trace function from a branch trace frame. */ | |
1064 | ||
1065 | static const struct btrace_function * | |
1066 | btrace_get_frame_function (struct frame_info *frame) | |
1067 | { | |
1068 | const struct btrace_frame_cache *cache; | |
1069 | const struct btrace_function *bfun; | |
1070 | struct btrace_frame_cache pattern; | |
1071 | void **slot; | |
1072 | ||
1073 | pattern.frame = frame; | |
1074 | ||
1075 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1076 | if (slot == NULL) | |
1077 | return NULL; | |
1078 | ||
1079 | cache = *slot; | |
1080 | return cache->bfun; | |
1081 | } | |
1082 | ||
cecac1ab MM |
1083 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1084 | ||
1085 | static enum unwind_stop_reason | |
1086 | record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame, | |
1087 | void **this_cache) | |
1088 | { | |
0b722aec MM |
1089 | const struct btrace_frame_cache *cache; |
1090 | const struct btrace_function *bfun; | |
1091 | ||
1092 | cache = *this_cache; | |
1093 | bfun = cache->bfun; | |
1094 | gdb_assert (bfun != NULL); | |
1095 | ||
1096 | if (bfun->up == NULL) | |
1097 | return UNWIND_UNAVAILABLE; | |
1098 | ||
1099 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1100 | } |
1101 | ||
1102 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1103 | ||
1104 | static void | |
1105 | record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache, | |
1106 | struct frame_id *this_id) | |
1107 | { | |
0b722aec MM |
1108 | const struct btrace_frame_cache *cache; |
1109 | const struct btrace_function *bfun; | |
1110 | CORE_ADDR code, special; | |
1111 | ||
1112 | cache = *this_cache; | |
1113 | ||
1114 | bfun = cache->bfun; | |
1115 | gdb_assert (bfun != NULL); | |
1116 | ||
1117 | while (bfun->segment.prev != NULL) | |
1118 | bfun = bfun->segment.prev; | |
1119 | ||
1120 | code = get_frame_func (this_frame); | |
1121 | special = bfun->number; | |
1122 | ||
1123 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1124 | ||
1125 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1126 | btrace_get_bfun_name (cache->bfun), | |
1127 | core_addr_to_string_nz (this_id->code_addr), | |
1128 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1129 | } |
1130 | ||
1131 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1132 | ||
1133 | static struct value * | |
1134 | record_btrace_frame_prev_register (struct frame_info *this_frame, | |
1135 | void **this_cache, | |
1136 | int regnum) | |
1137 | { | |
0b722aec MM |
1138 | const struct btrace_frame_cache *cache; |
1139 | const struct btrace_function *bfun, *caller; | |
1140 | const struct btrace_insn *insn; | |
1141 | struct gdbarch *gdbarch; | |
1142 | CORE_ADDR pc; | |
1143 | int pcreg; | |
1144 | ||
1145 | gdbarch = get_frame_arch (this_frame); | |
1146 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1147 | if (pcreg < 0 || regnum != pcreg) | |
1148 | throw_error (NOT_AVAILABLE_ERROR, | |
1149 | _("Registers are not available in btrace record history")); | |
1150 | ||
1151 | cache = *this_cache; | |
1152 | bfun = cache->bfun; | |
1153 | gdb_assert (bfun != NULL); | |
1154 | ||
1155 | caller = bfun->up; | |
1156 | if (caller == NULL) | |
1157 | throw_error (NOT_AVAILABLE_ERROR, | |
1158 | _("No caller in btrace record history")); | |
1159 | ||
1160 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) | |
1161 | { | |
1162 | insn = VEC_index (btrace_insn_s, caller->insn, 0); | |
1163 | pc = insn->pc; | |
1164 | } | |
1165 | else | |
1166 | { | |
1167 | insn = VEC_last (btrace_insn_s, caller->insn); | |
1168 | pc = insn->pc; | |
1169 | ||
1170 | pc += gdb_insn_length (gdbarch, pc); | |
1171 | } | |
1172 | ||
1173 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1174 | btrace_get_bfun_name (bfun), bfun->level, | |
1175 | core_addr_to_string_nz (pc)); | |
1176 | ||
1177 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1178 | } |
1179 | ||
1180 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1181 | ||
1182 | static int | |
1183 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
1184 | struct frame_info *this_frame, | |
1185 | void **this_cache) | |
1186 | { | |
0b722aec MM |
1187 | const struct btrace_function *bfun; |
1188 | struct btrace_frame_cache *cache; | |
cecac1ab | 1189 | struct thread_info *tp; |
0b722aec | 1190 | struct frame_info *next; |
cecac1ab MM |
1191 | |
1192 | /* THIS_FRAME does not contain a reference to its thread. */ | |
1193 | tp = find_thread_ptid (inferior_ptid); | |
1194 | gdb_assert (tp != NULL); | |
1195 | ||
0b722aec MM |
1196 | bfun = NULL; |
1197 | next = get_next_frame (this_frame); | |
1198 | if (next == NULL) | |
1199 | { | |
1200 | const struct btrace_insn_iterator *replay; | |
1201 | ||
1202 | replay = tp->btrace.replay; | |
1203 | if (replay != NULL) | |
1204 | bfun = replay->function; | |
1205 | } | |
1206 | else | |
1207 | { | |
1208 | const struct btrace_function *callee; | |
1209 | ||
1210 | callee = btrace_get_frame_function (next); | |
1211 | if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1212 | bfun = callee->up; | |
1213 | } | |
1214 | ||
1215 | if (bfun == NULL) | |
1216 | return 0; | |
1217 | ||
1218 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1219 | btrace_get_bfun_name (bfun), bfun->level); | |
1220 | ||
1221 | /* This is our frame. Initialize the frame cache. */ | |
1222 | cache = bfcache_new (this_frame); | |
1223 | cache->tp = tp; | |
1224 | cache->bfun = bfun; | |
1225 | ||
1226 | *this_cache = cache; | |
1227 | return 1; | |
1228 | } | |
1229 | ||
1230 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1231 | ||
1232 | static int | |
1233 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
1234 | struct frame_info *this_frame, | |
1235 | void **this_cache) | |
1236 | { | |
1237 | const struct btrace_function *bfun, *callee; | |
1238 | struct btrace_frame_cache *cache; | |
1239 | struct frame_info *next; | |
1240 | ||
1241 | next = get_next_frame (this_frame); | |
1242 | if (next == NULL) | |
1243 | return 0; | |
1244 | ||
1245 | callee = btrace_get_frame_function (next); | |
1246 | if (callee == NULL) | |
1247 | return 0; | |
1248 | ||
1249 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1250 | return 0; | |
1251 | ||
1252 | bfun = callee->up; | |
1253 | if (bfun == NULL) | |
1254 | return 0; | |
1255 | ||
1256 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", | |
1257 | btrace_get_bfun_name (bfun), bfun->level); | |
1258 | ||
1259 | /* This is our frame. Initialize the frame cache. */ | |
1260 | cache = bfcache_new (this_frame); | |
1261 | cache->tp = find_thread_ptid (inferior_ptid); | |
1262 | cache->bfun = bfun; | |
1263 | ||
1264 | *this_cache = cache; | |
1265 | return 1; | |
1266 | } | |
1267 | ||
1268 | static void | |
1269 | record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
1270 | { | |
1271 | struct btrace_frame_cache *cache; | |
1272 | void **slot; | |
1273 | ||
1274 | cache = this_cache; | |
1275 | ||
1276 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1277 | gdb_assert (slot != NULL); | |
1278 | ||
1279 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1280 | } |
1281 | ||
1282 | /* btrace recording does not store previous memory content, neither the stack | |
1283 | frames content. Any unwinding would return errorneous results as the stack | |
1284 | contents no longer matches the changed PC value restored from history. | |
1285 | Therefore this unwinder reports any possibly unwound registers as | |
1286 | <unavailable>. */ | |
1287 | ||
0b722aec | 1288 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab MM |
1289 | { |
1290 | NORMAL_FRAME, | |
1291 | record_btrace_frame_unwind_stop_reason, | |
1292 | record_btrace_frame_this_id, | |
1293 | record_btrace_frame_prev_register, | |
1294 | NULL, | |
0b722aec MM |
1295 | record_btrace_frame_sniffer, |
1296 | record_btrace_frame_dealloc_cache | |
1297 | }; | |
1298 | ||
1299 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1300 | { | |
1301 | TAILCALL_FRAME, | |
1302 | record_btrace_frame_unwind_stop_reason, | |
1303 | record_btrace_frame_this_id, | |
1304 | record_btrace_frame_prev_register, | |
1305 | NULL, | |
1306 | record_btrace_tailcall_frame_sniffer, | |
1307 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1308 | }; |
b2f4cfde | 1309 | |
ac01945b TT |
1310 | /* Implement the to_get_unwinder method. */ |
1311 | ||
1312 | static const struct frame_unwind * | |
1313 | record_btrace_to_get_unwinder (struct target_ops *self) | |
1314 | { | |
1315 | return &record_btrace_frame_unwind; | |
1316 | } | |
1317 | ||
1318 | /* Implement the to_get_tailcall_unwinder method. */ | |
1319 | ||
1320 | static const struct frame_unwind * | |
1321 | record_btrace_to_get_tailcall_unwinder (struct target_ops *self) | |
1322 | { | |
1323 | return &record_btrace_tailcall_frame_unwind; | |
1324 | } | |
1325 | ||
52834460 MM |
1326 | /* Indicate that TP should be resumed according to FLAG. */ |
1327 | ||
1328 | static void | |
1329 | record_btrace_resume_thread (struct thread_info *tp, | |
1330 | enum btrace_thread_flag flag) | |
1331 | { | |
1332 | struct btrace_thread_info *btinfo; | |
1333 | ||
1334 | DEBUG ("resuming %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flag); | |
1335 | ||
1336 | btinfo = &tp->btrace; | |
1337 | ||
1338 | if ((btinfo->flags & BTHR_MOVE) != 0) | |
1339 | error (_("Thread already moving.")); | |
1340 | ||
1341 | /* Fetch the latest branch trace. */ | |
1342 | btrace_fetch (tp); | |
1343 | ||
1344 | btinfo->flags |= flag; | |
1345 | } | |
1346 | ||
1347 | /* Find the thread to resume given a PTID. */ | |
1348 | ||
1349 | static struct thread_info * | |
1350 | record_btrace_find_resume_thread (ptid_t ptid) | |
1351 | { | |
1352 | struct thread_info *tp; | |
1353 | ||
1354 | /* When asked to resume everything, we pick the current thread. */ | |
1355 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
1356 | ptid = inferior_ptid; | |
1357 | ||
1358 | return find_thread_ptid (ptid); | |
1359 | } | |
1360 | ||
1361 | /* Start replaying a thread. */ | |
1362 | ||
1363 | static struct btrace_insn_iterator * | |
1364 | record_btrace_start_replaying (struct thread_info *tp) | |
1365 | { | |
1366 | volatile struct gdb_exception except; | |
1367 | struct btrace_insn_iterator *replay; | |
1368 | struct btrace_thread_info *btinfo; | |
1369 | int executing; | |
1370 | ||
1371 | btinfo = &tp->btrace; | |
1372 | replay = NULL; | |
1373 | ||
1374 | /* We can't start replaying without trace. */ | |
1375 | if (btinfo->begin == NULL) | |
1376 | return NULL; | |
1377 | ||
1378 | /* Clear the executing flag to allow changes to the current frame. | |
1379 | We are not actually running, yet. We just started a reverse execution | |
1380 | command or a record goto command. | |
1381 | For the latter, EXECUTING is false and this has no effect. | |
1382 | For the former, EXECUTING is true and we're in to_wait, about to | |
1383 | move the thread. Since we need to recompute the stack, we temporarily | |
1384 | set EXECUTING to flase. */ | |
1385 | executing = is_executing (tp->ptid); | |
1386 | set_executing (tp->ptid, 0); | |
1387 | ||
1388 | /* GDB stores the current frame_id when stepping in order to detects steps | |
1389 | into subroutines. | |
1390 | Since frames are computed differently when we're replaying, we need to | |
1391 | recompute those stored frames and fix them up so we can still detect | |
1392 | subroutines after we started replaying. */ | |
1393 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1394 | { | |
1395 | struct frame_info *frame; | |
1396 | struct frame_id frame_id; | |
1397 | int upd_step_frame_id, upd_step_stack_frame_id; | |
1398 | ||
1399 | /* The current frame without replaying - computed via normal unwind. */ | |
1400 | frame = get_current_frame (); | |
1401 | frame_id = get_frame_id (frame); | |
1402 | ||
1403 | /* Check if we need to update any stepping-related frame id's. */ | |
1404 | upd_step_frame_id = frame_id_eq (frame_id, | |
1405 | tp->control.step_frame_id); | |
1406 | upd_step_stack_frame_id = frame_id_eq (frame_id, | |
1407 | tp->control.step_stack_frame_id); | |
1408 | ||
1409 | /* We start replaying at the end of the branch trace. This corresponds | |
1410 | to the current instruction. */ | |
1411 | replay = xmalloc (sizeof (*replay)); | |
1412 | btrace_insn_end (replay, btinfo); | |
1413 | ||
1414 | /* We're not replaying, yet. */ | |
1415 | gdb_assert (btinfo->replay == NULL); | |
1416 | btinfo->replay = replay; | |
1417 | ||
1418 | /* Make sure we're not using any stale registers. */ | |
1419 | registers_changed_ptid (tp->ptid); | |
1420 | ||
1421 | /* The current frame with replaying - computed via btrace unwind. */ | |
1422 | frame = get_current_frame (); | |
1423 | frame_id = get_frame_id (frame); | |
1424 | ||
1425 | /* Replace stepping related frames where necessary. */ | |
1426 | if (upd_step_frame_id) | |
1427 | tp->control.step_frame_id = frame_id; | |
1428 | if (upd_step_stack_frame_id) | |
1429 | tp->control.step_stack_frame_id = frame_id; | |
1430 | } | |
1431 | ||
1432 | /* Restore the previous execution state. */ | |
1433 | set_executing (tp->ptid, executing); | |
1434 | ||
1435 | if (except.reason < 0) | |
1436 | { | |
1437 | xfree (btinfo->replay); | |
1438 | btinfo->replay = NULL; | |
1439 | ||
1440 | registers_changed_ptid (tp->ptid); | |
1441 | ||
1442 | throw_exception (except); | |
1443 | } | |
1444 | ||
1445 | return replay; | |
1446 | } | |
1447 | ||
1448 | /* Stop replaying a thread. */ | |
1449 | ||
1450 | static void | |
1451 | record_btrace_stop_replaying (struct thread_info *tp) | |
1452 | { | |
1453 | struct btrace_thread_info *btinfo; | |
1454 | ||
1455 | btinfo = &tp->btrace; | |
1456 | ||
1457 | xfree (btinfo->replay); | |
1458 | btinfo->replay = NULL; | |
1459 | ||
1460 | /* Make sure we're not leaving any stale registers. */ | |
1461 | registers_changed_ptid (tp->ptid); | |
1462 | } | |
1463 | ||
b2f4cfde MM |
1464 | /* The to_resume method of target record-btrace. */ |
1465 | ||
1466 | static void | |
1467 | record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step, | |
1468 | enum gdb_signal signal) | |
1469 | { | |
52834460 MM |
1470 | struct thread_info *tp, *other; |
1471 | enum btrace_thread_flag flag; | |
1472 | ||
1473 | DEBUG ("resume %s: %s", target_pid_to_str (ptid), step ? "step" : "cont"); | |
1474 | ||
1475 | tp = record_btrace_find_resume_thread (ptid); | |
1476 | if (tp == NULL) | |
1477 | error (_("Cannot find thread to resume.")); | |
1478 | ||
1479 | /* Stop replaying other threads if the thread to resume is not replaying. */ | |
1480 | if (!btrace_is_replaying (tp) && execution_direction != EXEC_REVERSE) | |
1481 | ALL_THREADS (other) | |
1482 | record_btrace_stop_replaying (other); | |
1483 | ||
b2f4cfde | 1484 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 1485 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde MM |
1486 | { |
1487 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1488 | if (ops->to_resume != NULL) | |
1489 | return ops->to_resume (ops, ptid, step, signal); | |
1490 | ||
1491 | error (_("Cannot find target for stepping.")); | |
1492 | } | |
1493 | ||
52834460 MM |
1494 | /* Compute the btrace thread flag for the requested move. */ |
1495 | if (step == 0) | |
1496 | flag = execution_direction == EXEC_REVERSE ? BTHR_RCONT : BTHR_CONT; | |
1497 | else | |
1498 | flag = execution_direction == EXEC_REVERSE ? BTHR_RSTEP : BTHR_STEP; | |
1499 | ||
1500 | /* At the moment, we only move a single thread. We could also move | |
1501 | all threads in parallel by single-stepping each resumed thread | |
1502 | until the first runs into an event. | |
1503 | When we do that, we would want to continue all other threads. | |
1504 | For now, just resume one thread to not confuse to_wait. */ | |
1505 | record_btrace_resume_thread (tp, flag); | |
1506 | ||
1507 | /* We just indicate the resume intent here. The actual stepping happens in | |
1508 | record_btrace_wait below. */ | |
1509 | } | |
1510 | ||
1511 | /* Find a thread to move. */ | |
1512 | ||
1513 | static struct thread_info * | |
1514 | record_btrace_find_thread_to_move (ptid_t ptid) | |
1515 | { | |
1516 | struct thread_info *tp; | |
1517 | ||
1518 | /* First check the parameter thread. */ | |
1519 | tp = find_thread_ptid (ptid); | |
1520 | if (tp != NULL && (tp->btrace.flags & BTHR_MOVE) != 0) | |
1521 | return tp; | |
1522 | ||
1523 | /* Otherwise, find one other thread that has been resumed. */ | |
1524 | ALL_THREADS (tp) | |
1525 | if ((tp->btrace.flags & BTHR_MOVE) != 0) | |
1526 | return tp; | |
1527 | ||
1528 | return NULL; | |
1529 | } | |
1530 | ||
1531 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
1532 | ||
1533 | static struct target_waitstatus | |
1534 | btrace_step_no_history (void) | |
1535 | { | |
1536 | struct target_waitstatus status; | |
1537 | ||
1538 | status.kind = TARGET_WAITKIND_NO_HISTORY; | |
1539 | ||
1540 | return status; | |
1541 | } | |
1542 | ||
1543 | /* Return a target_waitstatus indicating that a step finished. */ | |
1544 | ||
1545 | static struct target_waitstatus | |
1546 | btrace_step_stopped (void) | |
1547 | { | |
1548 | struct target_waitstatus status; | |
1549 | ||
1550 | status.kind = TARGET_WAITKIND_STOPPED; | |
1551 | status.value.sig = GDB_SIGNAL_TRAP; | |
1552 | ||
1553 | return status; | |
1554 | } | |
1555 | ||
1556 | /* Clear the record histories. */ | |
1557 | ||
1558 | static void | |
1559 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
1560 | { | |
1561 | xfree (btinfo->insn_history); | |
1562 | xfree (btinfo->call_history); | |
1563 | ||
1564 | btinfo->insn_history = NULL; | |
1565 | btinfo->call_history = NULL; | |
1566 | } | |
1567 | ||
1568 | /* Step a single thread. */ | |
1569 | ||
1570 | static struct target_waitstatus | |
1571 | record_btrace_step_thread (struct thread_info *tp) | |
1572 | { | |
1573 | struct btrace_insn_iterator *replay, end; | |
1574 | struct btrace_thread_info *btinfo; | |
1575 | struct address_space *aspace; | |
1576 | struct inferior *inf; | |
1577 | enum btrace_thread_flag flags; | |
1578 | unsigned int steps; | |
1579 | ||
1580 | btinfo = &tp->btrace; | |
1581 | replay = btinfo->replay; | |
1582 | ||
1583 | flags = btinfo->flags & BTHR_MOVE; | |
1584 | btinfo->flags &= ~BTHR_MOVE; | |
1585 | ||
1586 | DEBUG ("stepping %d (%s): %u", tp->num, target_pid_to_str (tp->ptid), flags); | |
1587 | ||
1588 | switch (flags) | |
1589 | { | |
1590 | default: | |
1591 | internal_error (__FILE__, __LINE__, _("invalid stepping type.")); | |
1592 | ||
1593 | case BTHR_STEP: | |
1594 | /* We're done if we're not replaying. */ | |
1595 | if (replay == NULL) | |
1596 | return btrace_step_no_history (); | |
1597 | ||
1598 | /* We are always able to step at least once. */ | |
1599 | steps = btrace_insn_next (replay, 1); | |
1600 | gdb_assert (steps == 1); | |
1601 | ||
1602 | /* Determine the end of the instruction trace. */ | |
1603 | btrace_insn_end (&end, btinfo); | |
1604 | ||
1605 | /* We stop replaying if we reached the end of the trace. */ | |
1606 | if (btrace_insn_cmp (replay, &end) == 0) | |
1607 | record_btrace_stop_replaying (tp); | |
1608 | ||
1609 | return btrace_step_stopped (); | |
1610 | ||
1611 | case BTHR_RSTEP: | |
1612 | /* Start replaying if we're not already doing so. */ | |
1613 | if (replay == NULL) | |
1614 | replay = record_btrace_start_replaying (tp); | |
1615 | ||
1616 | /* If we can't step any further, we reached the end of the history. */ | |
1617 | steps = btrace_insn_prev (replay, 1); | |
1618 | if (steps == 0) | |
1619 | return btrace_step_no_history (); | |
1620 | ||
1621 | return btrace_step_stopped (); | |
1622 | ||
1623 | case BTHR_CONT: | |
1624 | /* We're done if we're not replaying. */ | |
1625 | if (replay == NULL) | |
1626 | return btrace_step_no_history (); | |
1627 | ||
1628 | inf = find_inferior_pid (ptid_get_pid (tp->ptid)); | |
1629 | aspace = inf->aspace; | |
1630 | ||
1631 | /* Determine the end of the instruction trace. */ | |
1632 | btrace_insn_end (&end, btinfo); | |
1633 | ||
1634 | for (;;) | |
1635 | { | |
1636 | const struct btrace_insn *insn; | |
1637 | ||
1638 | /* We are always able to step at least once. */ | |
1639 | steps = btrace_insn_next (replay, 1); | |
1640 | gdb_assert (steps == 1); | |
1641 | ||
1642 | /* We stop replaying if we reached the end of the trace. */ | |
1643 | if (btrace_insn_cmp (replay, &end) == 0) | |
1644 | { | |
1645 | record_btrace_stop_replaying (tp); | |
1646 | return btrace_step_no_history (); | |
1647 | } | |
1648 | ||
1649 | insn = btrace_insn_get (replay); | |
1650 | gdb_assert (insn); | |
1651 | ||
1652 | DEBUG ("stepping %d (%s) ... %s", tp->num, | |
1653 | target_pid_to_str (tp->ptid), | |
1654 | core_addr_to_string_nz (insn->pc)); | |
1655 | ||
1656 | if (breakpoint_here_p (aspace, insn->pc)) | |
1657 | return btrace_step_stopped (); | |
1658 | } | |
1659 | ||
1660 | case BTHR_RCONT: | |
1661 | /* Start replaying if we're not already doing so. */ | |
1662 | if (replay == NULL) | |
1663 | replay = record_btrace_start_replaying (tp); | |
1664 | ||
1665 | inf = find_inferior_pid (ptid_get_pid (tp->ptid)); | |
1666 | aspace = inf->aspace; | |
1667 | ||
1668 | for (;;) | |
1669 | { | |
1670 | const struct btrace_insn *insn; | |
1671 | ||
1672 | /* If we can't step any further, we're done. */ | |
1673 | steps = btrace_insn_prev (replay, 1); | |
1674 | if (steps == 0) | |
1675 | return btrace_step_no_history (); | |
1676 | ||
1677 | insn = btrace_insn_get (replay); | |
1678 | gdb_assert (insn); | |
1679 | ||
1680 | DEBUG ("reverse-stepping %d (%s) ... %s", tp->num, | |
1681 | target_pid_to_str (tp->ptid), | |
1682 | core_addr_to_string_nz (insn->pc)); | |
1683 | ||
1684 | if (breakpoint_here_p (aspace, insn->pc)) | |
1685 | return btrace_step_stopped (); | |
1686 | } | |
1687 | } | |
b2f4cfde MM |
1688 | } |
1689 | ||
1690 | /* The to_wait method of target record-btrace. */ | |
1691 | ||
1692 | static ptid_t | |
1693 | record_btrace_wait (struct target_ops *ops, ptid_t ptid, | |
1694 | struct target_waitstatus *status, int options) | |
1695 | { | |
52834460 MM |
1696 | struct thread_info *tp, *other; |
1697 | ||
1698 | DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options); | |
1699 | ||
b2f4cfde | 1700 | /* As long as we're not replaying, just forward the request. */ |
1c63c994 | 1701 | if (!record_btrace_is_replaying (ops) && execution_direction != EXEC_REVERSE) |
b2f4cfde MM |
1702 | { |
1703 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1704 | if (ops->to_wait != NULL) | |
1705 | return ops->to_wait (ops, ptid, status, options); | |
1706 | ||
1707 | error (_("Cannot find target for waiting.")); | |
1708 | } | |
1709 | ||
52834460 MM |
1710 | /* Let's find a thread to move. */ |
1711 | tp = record_btrace_find_thread_to_move (ptid); | |
1712 | if (tp == NULL) | |
1713 | { | |
1714 | DEBUG ("wait %s: no thread", target_pid_to_str (ptid)); | |
1715 | ||
1716 | status->kind = TARGET_WAITKIND_IGNORE; | |
1717 | return minus_one_ptid; | |
1718 | } | |
1719 | ||
1720 | /* We only move a single thread. We're not able to correlate threads. */ | |
1721 | *status = record_btrace_step_thread (tp); | |
1722 | ||
1723 | /* Stop all other threads. */ | |
1724 | if (!non_stop) | |
1725 | ALL_THREADS (other) | |
1726 | other->btrace.flags &= ~BTHR_MOVE; | |
1727 | ||
1728 | /* Start record histories anew from the current position. */ | |
1729 | record_btrace_clear_histories (&tp->btrace); | |
1730 | ||
1731 | /* We moved the replay position but did not update registers. */ | |
1732 | registers_changed_ptid (tp->ptid); | |
1733 | ||
1734 | return tp->ptid; | |
1735 | } | |
1736 | ||
1737 | /* The to_can_execute_reverse method of target record-btrace. */ | |
1738 | ||
1739 | static int | |
19db3e69 | 1740 | record_btrace_can_execute_reverse (struct target_ops *self) |
52834460 MM |
1741 | { |
1742 | return 1; | |
1743 | } | |
1744 | ||
1745 | /* The to_decr_pc_after_break method of target record-btrace. */ | |
1746 | ||
1747 | static CORE_ADDR | |
1748 | record_btrace_decr_pc_after_break (struct target_ops *ops, | |
1749 | struct gdbarch *gdbarch) | |
1750 | { | |
1751 | /* When replaying, we do not actually execute the breakpoint instruction | |
1752 | so there is no need to adjust the PC after hitting a breakpoint. */ | |
1c63c994 | 1753 | if (record_btrace_is_replaying (ops)) |
52834460 MM |
1754 | return 0; |
1755 | ||
c0eca49f | 1756 | return ops->beneath->to_decr_pc_after_break (ops->beneath, gdbarch); |
b2f4cfde MM |
1757 | } |
1758 | ||
e2887aa3 MM |
1759 | /* The to_find_new_threads method of target record-btrace. */ |
1760 | ||
1761 | static void | |
1762 | record_btrace_find_new_threads (struct target_ops *ops) | |
1763 | { | |
1764 | /* Don't expect new threads if we're replaying. */ | |
1c63c994 | 1765 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
1766 | return; |
1767 | ||
1768 | /* Forward the request. */ | |
1769 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1770 | if (ops->to_find_new_threads != NULL) | |
1771 | { | |
1772 | ops->to_find_new_threads (ops); | |
1773 | break; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | /* The to_thread_alive method of target record-btrace. */ | |
1778 | ||
1779 | static int | |
1780 | record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid) | |
1781 | { | |
1782 | /* We don't add or remove threads during replay. */ | |
1c63c994 | 1783 | if (record_btrace_is_replaying (ops)) |
e2887aa3 MM |
1784 | return find_thread_ptid (ptid) != NULL; |
1785 | ||
1786 | /* Forward the request. */ | |
1787 | for (ops = ops->beneath; ops != NULL; ops = ops->beneath) | |
1788 | if (ops->to_thread_alive != NULL) | |
1789 | return ops->to_thread_alive (ops, ptid); | |
1790 | ||
1791 | return 0; | |
1792 | } | |
1793 | ||
066ce621 MM |
1794 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
1795 | is stopped. */ | |
1796 | ||
1797 | static void | |
1798 | record_btrace_set_replay (struct thread_info *tp, | |
1799 | const struct btrace_insn_iterator *it) | |
1800 | { | |
1801 | struct btrace_thread_info *btinfo; | |
1802 | ||
1803 | btinfo = &tp->btrace; | |
1804 | ||
1805 | if (it == NULL || it->function == NULL) | |
52834460 | 1806 | record_btrace_stop_replaying (tp); |
066ce621 MM |
1807 | else |
1808 | { | |
1809 | if (btinfo->replay == NULL) | |
52834460 | 1810 | record_btrace_start_replaying (tp); |
066ce621 MM |
1811 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
1812 | return; | |
1813 | ||
1814 | *btinfo->replay = *it; | |
52834460 | 1815 | registers_changed_ptid (tp->ptid); |
066ce621 MM |
1816 | } |
1817 | ||
52834460 MM |
1818 | /* Start anew from the new replay position. */ |
1819 | record_btrace_clear_histories (btinfo); | |
066ce621 MM |
1820 | } |
1821 | ||
1822 | /* The to_goto_record_begin method of target record-btrace. */ | |
1823 | ||
1824 | static void | |
08475817 | 1825 | record_btrace_goto_begin (struct target_ops *self) |
066ce621 MM |
1826 | { |
1827 | struct thread_info *tp; | |
1828 | struct btrace_insn_iterator begin; | |
1829 | ||
1830 | tp = require_btrace_thread (); | |
1831 | ||
1832 | btrace_insn_begin (&begin, &tp->btrace); | |
1833 | record_btrace_set_replay (tp, &begin); | |
1834 | ||
1835 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1836 | } | |
1837 | ||
1838 | /* The to_goto_record_end method of target record-btrace. */ | |
1839 | ||
1840 | static void | |
307a1b91 | 1841 | record_btrace_goto_end (struct target_ops *ops) |
066ce621 MM |
1842 | { |
1843 | struct thread_info *tp; | |
1844 | ||
1845 | tp = require_btrace_thread (); | |
1846 | ||
1847 | record_btrace_set_replay (tp, NULL); | |
1848 | ||
1849 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1850 | } | |
1851 | ||
1852 | /* The to_goto_record method of target record-btrace. */ | |
1853 | ||
1854 | static void | |
606183ac | 1855 | record_btrace_goto (struct target_ops *self, ULONGEST insn) |
066ce621 MM |
1856 | { |
1857 | struct thread_info *tp; | |
1858 | struct btrace_insn_iterator it; | |
1859 | unsigned int number; | |
1860 | int found; | |
1861 | ||
1862 | number = insn; | |
1863 | ||
1864 | /* Check for wrap-arounds. */ | |
1865 | if (number != insn) | |
1866 | error (_("Instruction number out of range.")); | |
1867 | ||
1868 | tp = require_btrace_thread (); | |
1869 | ||
1870 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
1871 | if (found == 0) | |
1872 | error (_("No such instruction.")); | |
1873 | ||
1874 | record_btrace_set_replay (tp, &it); | |
1875 | ||
1876 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); | |
1877 | } | |
1878 | ||
afedecd3 MM |
1879 | /* Initialize the record-btrace target ops. */ |
1880 | ||
1881 | static void | |
1882 | init_record_btrace_ops (void) | |
1883 | { | |
1884 | struct target_ops *ops; | |
1885 | ||
1886 | ops = &record_btrace_ops; | |
1887 | ops->to_shortname = "record-btrace"; | |
1888 | ops->to_longname = "Branch tracing target"; | |
1889 | ops->to_doc = "Collect control-flow trace and provide the execution history."; | |
1890 | ops->to_open = record_btrace_open; | |
1891 | ops->to_close = record_btrace_close; | |
1892 | ops->to_detach = record_detach; | |
1893 | ops->to_disconnect = record_disconnect; | |
1894 | ops->to_mourn_inferior = record_mourn_inferior; | |
1895 | ops->to_kill = record_kill; | |
afedecd3 MM |
1896 | ops->to_stop_recording = record_btrace_stop_recording; |
1897 | ops->to_info_record = record_btrace_info; | |
1898 | ops->to_insn_history = record_btrace_insn_history; | |
1899 | ops->to_insn_history_from = record_btrace_insn_history_from; | |
1900 | ops->to_insn_history_range = record_btrace_insn_history_range; | |
1901 | ops->to_call_history = record_btrace_call_history; | |
1902 | ops->to_call_history_from = record_btrace_call_history_from; | |
1903 | ops->to_call_history_range = record_btrace_call_history_range; | |
07bbe694 | 1904 | ops->to_record_is_replaying = record_btrace_is_replaying; |
633785ff MM |
1905 | ops->to_xfer_partial = record_btrace_xfer_partial; |
1906 | ops->to_remove_breakpoint = record_btrace_remove_breakpoint; | |
1907 | ops->to_insert_breakpoint = record_btrace_insert_breakpoint; | |
1f3ef581 MM |
1908 | ops->to_fetch_registers = record_btrace_fetch_registers; |
1909 | ops->to_store_registers = record_btrace_store_registers; | |
1910 | ops->to_prepare_to_store = record_btrace_prepare_to_store; | |
ac01945b TT |
1911 | ops->to_get_unwinder = &record_btrace_to_get_unwinder; |
1912 | ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder; | |
b2f4cfde MM |
1913 | ops->to_resume = record_btrace_resume; |
1914 | ops->to_wait = record_btrace_wait; | |
e2887aa3 MM |
1915 | ops->to_find_new_threads = record_btrace_find_new_threads; |
1916 | ops->to_thread_alive = record_btrace_thread_alive; | |
066ce621 MM |
1917 | ops->to_goto_record_begin = record_btrace_goto_begin; |
1918 | ops->to_goto_record_end = record_btrace_goto_end; | |
1919 | ops->to_goto_record = record_btrace_goto; | |
52834460 MM |
1920 | ops->to_can_execute_reverse = record_btrace_can_execute_reverse; |
1921 | ops->to_decr_pc_after_break = record_btrace_decr_pc_after_break; | |
afedecd3 MM |
1922 | ops->to_stratum = record_stratum; |
1923 | ops->to_magic = OPS_MAGIC; | |
1924 | } | |
1925 | ||
1926 | /* Alias for "target record". */ | |
1927 | ||
1928 | static void | |
1929 | cmd_record_btrace_start (char *args, int from_tty) | |
1930 | { | |
1931 | if (args != NULL && *args != 0) | |
1932 | error (_("Invalid argument.")); | |
1933 | ||
1934 | execute_command ("target record-btrace", from_tty); | |
1935 | } | |
1936 | ||
1937 | void _initialize_record_btrace (void); | |
1938 | ||
1939 | /* Initialize btrace commands. */ | |
1940 | ||
1941 | void | |
1942 | _initialize_record_btrace (void) | |
1943 | { | |
1944 | add_cmd ("btrace", class_obscure, cmd_record_btrace_start, | |
1945 | _("Start branch trace recording."), | |
1946 | &record_cmdlist); | |
1947 | add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist); | |
1948 | ||
1949 | init_record_btrace_ops (); | |
1950 | add_target (&record_btrace_ops); | |
0b722aec MM |
1951 | |
1952 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
1953 | xcalloc, xfree); | |
afedecd3 | 1954 | } |