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afedecd3 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
213516ef | 3 | Copyright (C) 2013-2023 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" | |
c0272db5 | 24 | #include "record-btrace.h" |
afedecd3 MM |
25 | #include "gdbthread.h" |
26 | #include "target.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "disasm.h" | |
76727919 | 29 | #include "observable.h" |
afedecd3 MM |
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" |
45741a9c | 38 | #include "infrun.h" |
400b5eca | 39 | #include "gdbsupport/event-loop.h" |
70ad5bff | 40 | #include "inf-loop.h" |
00431a78 | 41 | #include "inferior.h" |
325fac50 | 42 | #include <algorithm> |
0d12e84c | 43 | #include "gdbarch.h" |
e43b10e1 | 44 | #include "cli/cli-style.h" |
93b54c8e | 45 | #include "async-event.h" |
159ed7d9 | 46 | #include <forward_list> |
1acc9dca | 47 | #include "objfiles.h" |
44fbffc6 | 48 | #include "interps.h" |
afedecd3 | 49 | |
d9f719f1 PA |
50 | static const target_info record_btrace_target_info = { |
51 | "record-btrace", | |
52 | N_("Branch tracing target"), | |
53 | N_("Collect control-flow trace and provide the execution history.") | |
54 | }; | |
55 | ||
afedecd3 | 56 | /* The target_ops of record-btrace. */ |
f6ac5f3d PA |
57 | |
58 | class record_btrace_target final : public target_ops | |
59 | { | |
60 | public: | |
d9f719f1 PA |
61 | const target_info &info () const override |
62 | { return record_btrace_target_info; } | |
f6ac5f3d | 63 | |
66b4deae PA |
64 | strata stratum () const override { return record_stratum; } |
65 | ||
f6ac5f3d | 66 | void close () override; |
4a570176 | 67 | void async (bool) override; |
f6ac5f3d PA |
68 | |
69 | void detach (inferior *inf, int from_tty) override | |
70 | { record_detach (this, inf, from_tty); } | |
71 | ||
72 | void disconnect (const char *, int) override; | |
73 | ||
74 | void mourn_inferior () override | |
75 | { record_mourn_inferior (this); } | |
76 | ||
77 | void kill () override | |
78 | { record_kill (this); } | |
79 | ||
80 | enum record_method record_method (ptid_t ptid) override; | |
81 | ||
82 | void stop_recording () override; | |
83 | void info_record () override; | |
84 | ||
85 | void insn_history (int size, gdb_disassembly_flags flags) override; | |
86 | void insn_history_from (ULONGEST from, int size, | |
87 | gdb_disassembly_flags flags) override; | |
88 | void insn_history_range (ULONGEST begin, ULONGEST end, | |
89 | gdb_disassembly_flags flags) override; | |
90 | void call_history (int size, record_print_flags flags) override; | |
91 | void call_history_from (ULONGEST begin, int size, record_print_flags flags) | |
92 | override; | |
93 | void call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) | |
94 | override; | |
95 | ||
57810aa7 PA |
96 | bool record_is_replaying (ptid_t ptid) override; |
97 | bool record_will_replay (ptid_t ptid, int dir) override; | |
f6ac5f3d PA |
98 | void record_stop_replaying () override; |
99 | ||
100 | enum target_xfer_status xfer_partial (enum target_object object, | |
101 | const char *annex, | |
102 | gdb_byte *readbuf, | |
103 | const gdb_byte *writebuf, | |
104 | ULONGEST offset, ULONGEST len, | |
105 | ULONGEST *xfered_len) override; | |
106 | ||
107 | int insert_breakpoint (struct gdbarch *, | |
108 | struct bp_target_info *) override; | |
109 | int remove_breakpoint (struct gdbarch *, struct bp_target_info *, | |
110 | enum remove_bp_reason) override; | |
111 | ||
112 | void fetch_registers (struct regcache *, int) override; | |
113 | ||
114 | void store_registers (struct regcache *, int) override; | |
115 | void prepare_to_store (struct regcache *) override; | |
116 | ||
117 | const struct frame_unwind *get_unwinder () override; | |
118 | ||
119 | const struct frame_unwind *get_tailcall_unwinder () override; | |
120 | ||
f6ac5f3d | 121 | void resume (ptid_t, int, enum gdb_signal) override; |
b60cea74 | 122 | ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override; |
f6ac5f3d PA |
123 | |
124 | void stop (ptid_t) override; | |
125 | void update_thread_list () override; | |
57810aa7 | 126 | bool thread_alive (ptid_t ptid) override; |
f6ac5f3d PA |
127 | void goto_record_begin () override; |
128 | void goto_record_end () override; | |
129 | void goto_record (ULONGEST insn) override; | |
130 | ||
57810aa7 | 131 | bool can_execute_reverse () override; |
f6ac5f3d | 132 | |
57810aa7 PA |
133 | bool stopped_by_sw_breakpoint () override; |
134 | bool supports_stopped_by_sw_breakpoint () override; | |
f6ac5f3d | 135 | |
57810aa7 PA |
136 | bool stopped_by_hw_breakpoint () override; |
137 | bool supports_stopped_by_hw_breakpoint () override; | |
f6ac5f3d PA |
138 | |
139 | enum exec_direction_kind execution_direction () override; | |
140 | void prepare_to_generate_core () override; | |
141 | void done_generating_core () override; | |
142 | }; | |
143 | ||
144 | static record_btrace_target record_btrace_ops; | |
145 | ||
146 | /* Initialize the record-btrace target ops. */ | |
afedecd3 | 147 | |
76727919 TT |
148 | /* Token associated with a new-thread observer enabling branch tracing |
149 | for the new thread. */ | |
3dcfdc58 | 150 | static const gdb::observers::token record_btrace_thread_observer_token {}; |
afedecd3 | 151 | |
67b5c0c1 MM |
152 | /* Memory access types used in set/show record btrace replay-memory-access. */ |
153 | static const char replay_memory_access_read_only[] = "read-only"; | |
154 | static const char replay_memory_access_read_write[] = "read-write"; | |
155 | static const char *const replay_memory_access_types[] = | |
156 | { | |
157 | replay_memory_access_read_only, | |
158 | replay_memory_access_read_write, | |
159 | NULL | |
160 | }; | |
161 | ||
162 | /* The currently allowed replay memory access type. */ | |
163 | static const char *replay_memory_access = replay_memory_access_read_only; | |
164 | ||
4a4495d6 MM |
165 | /* The cpu state kinds. */ |
166 | enum record_btrace_cpu_state_kind | |
167 | { | |
168 | CS_AUTO, | |
169 | CS_NONE, | |
170 | CS_CPU | |
171 | }; | |
172 | ||
173 | /* The current cpu state. */ | |
174 | static enum record_btrace_cpu_state_kind record_btrace_cpu_state = CS_AUTO; | |
175 | ||
176 | /* The current cpu for trace decode. */ | |
177 | static struct btrace_cpu record_btrace_cpu; | |
178 | ||
67b5c0c1 MM |
179 | /* Command lists for "set/show record btrace". */ |
180 | static struct cmd_list_element *set_record_btrace_cmdlist; | |
181 | static struct cmd_list_element *show_record_btrace_cmdlist; | |
633785ff | 182 | |
70ad5bff MM |
183 | /* The execution direction of the last resume we got. See record-full.c. */ |
184 | static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD; | |
185 | ||
186 | /* The async event handler for reverse/replay execution. */ | |
187 | static struct async_event_handler *record_btrace_async_inferior_event_handler; | |
188 | ||
aef92902 MM |
189 | /* A flag indicating that we are currently generating a core file. */ |
190 | static int record_btrace_generating_corefile; | |
191 | ||
f4abbc16 MM |
192 | /* The current branch trace configuration. */ |
193 | static struct btrace_config record_btrace_conf; | |
194 | ||
195 | /* Command list for "record btrace". */ | |
196 | static struct cmd_list_element *record_btrace_cmdlist; | |
197 | ||
d33501a5 MM |
198 | /* Command lists for "set/show record btrace bts". */ |
199 | static struct cmd_list_element *set_record_btrace_bts_cmdlist; | |
200 | static struct cmd_list_element *show_record_btrace_bts_cmdlist; | |
201 | ||
b20a6524 MM |
202 | /* Command lists for "set/show record btrace pt". */ |
203 | static struct cmd_list_element *set_record_btrace_pt_cmdlist; | |
204 | static struct cmd_list_element *show_record_btrace_pt_cmdlist; | |
205 | ||
4a4495d6 MM |
206 | /* Command list for "set record btrace cpu". */ |
207 | static struct cmd_list_element *set_record_btrace_cpu_cmdlist; | |
208 | ||
afedecd3 MM |
209 | /* Print a record-btrace debug message. Use do ... while (0) to avoid |
210 | ambiguities when used in if statements. */ | |
211 | ||
212 | #define DEBUG(msg, args...) \ | |
213 | do \ | |
214 | { \ | |
215 | if (record_debug != 0) \ | |
6cb06a8c TT |
216 | gdb_printf (gdb_stdlog, \ |
217 | "[record-btrace] " msg "\n", ##args); \ | |
afedecd3 MM |
218 | } \ |
219 | while (0) | |
220 | ||
221 | ||
4a4495d6 MM |
222 | /* Return the cpu configured by the user. Returns NULL if the cpu was |
223 | configured as auto. */ | |
224 | const struct btrace_cpu * | |
225 | record_btrace_get_cpu (void) | |
226 | { | |
227 | switch (record_btrace_cpu_state) | |
228 | { | |
229 | case CS_AUTO: | |
230 | return nullptr; | |
231 | ||
232 | case CS_NONE: | |
233 | record_btrace_cpu.vendor = CV_UNKNOWN; | |
234 | /* Fall through. */ | |
235 | case CS_CPU: | |
236 | return &record_btrace_cpu; | |
237 | } | |
238 | ||
239 | error (_("Internal error: bad record btrace cpu state.")); | |
240 | } | |
241 | ||
afedecd3 | 242 | /* Update the branch trace for the current thread and return a pointer to its |
066ce621 | 243 | thread_info. |
afedecd3 MM |
244 | |
245 | Throws an error if there is no thread or no trace. This function never | |
246 | returns NULL. */ | |
247 | ||
066ce621 MM |
248 | static struct thread_info * |
249 | require_btrace_thread (void) | |
afedecd3 | 250 | { |
afedecd3 MM |
251 | DEBUG ("require"); |
252 | ||
00431a78 | 253 | if (inferior_ptid == null_ptid) |
afedecd3 MM |
254 | error (_("No thread.")); |
255 | ||
00431a78 PA |
256 | thread_info *tp = inferior_thread (); |
257 | ||
cd4007e4 MM |
258 | validate_registers_access (); |
259 | ||
4a4495d6 | 260 | btrace_fetch (tp, record_btrace_get_cpu ()); |
afedecd3 | 261 | |
6e07b1d2 | 262 | if (btrace_is_empty (tp)) |
afedecd3 MM |
263 | error (_("No trace.")); |
264 | ||
066ce621 MM |
265 | return tp; |
266 | } | |
267 | ||
268 | /* Update the branch trace for the current thread and return a pointer to its | |
269 | branch trace information struct. | |
270 | ||
271 | Throws an error if there is no thread or no trace. This function never | |
272 | returns NULL. */ | |
273 | ||
274 | static struct btrace_thread_info * | |
275 | require_btrace (void) | |
276 | { | |
277 | struct thread_info *tp; | |
278 | ||
279 | tp = require_btrace_thread (); | |
280 | ||
281 | return &tp->btrace; | |
afedecd3 MM |
282 | } |
283 | ||
b02b0962 | 284 | /* The new thread observer. */ |
afedecd3 MM |
285 | |
286 | static void | |
b02b0962 | 287 | record_btrace_on_new_thread (struct thread_info *tp) |
afedecd3 | 288 | { |
d89edf9b MM |
289 | /* Ignore this thread if its inferior is not recorded by us. */ |
290 | target_ops *rec = tp->inf->target_at (record_stratum); | |
291 | if (rec != &record_btrace_ops) | |
292 | return; | |
293 | ||
a70b8144 | 294 | try |
492d29ea PA |
295 | { |
296 | btrace_enable (tp, &record_btrace_conf); | |
297 | } | |
230d2906 | 298 | catch (const gdb_exception_error &error) |
492d29ea | 299 | { |
3d6e9d23 | 300 | warning ("%s", error.what ()); |
492d29ea | 301 | } |
afedecd3 MM |
302 | } |
303 | ||
afedecd3 MM |
304 | /* Enable automatic tracing of new threads. */ |
305 | ||
306 | static void | |
307 | record_btrace_auto_enable (void) | |
308 | { | |
309 | DEBUG ("attach thread observer"); | |
310 | ||
b02b0962 | 311 | gdb::observers::new_thread.attach (record_btrace_on_new_thread, |
c90e7d63 SM |
312 | record_btrace_thread_observer_token, |
313 | "record-btrace"); | |
afedecd3 MM |
314 | } |
315 | ||
316 | /* Disable automatic tracing of new threads. */ | |
317 | ||
318 | static void | |
319 | record_btrace_auto_disable (void) | |
320 | { | |
afedecd3 MM |
321 | DEBUG ("detach thread observer"); |
322 | ||
76727919 | 323 | gdb::observers::new_thread.detach (record_btrace_thread_observer_token); |
afedecd3 MM |
324 | } |
325 | ||
70ad5bff MM |
326 | /* The record-btrace async event handler function. */ |
327 | ||
328 | static void | |
329 | record_btrace_handle_async_inferior_event (gdb_client_data data) | |
330 | { | |
b1a35af2 | 331 | inferior_event_handler (INF_REG_EVENT); |
70ad5bff MM |
332 | } |
333 | ||
c0272db5 TW |
334 | /* See record-btrace.h. */ |
335 | ||
336 | void | |
337 | record_btrace_push_target (void) | |
338 | { | |
339 | const char *format; | |
340 | ||
341 | record_btrace_auto_enable (); | |
342 | ||
02980c56 | 343 | current_inferior ()->push_target (&record_btrace_ops); |
c0272db5 TW |
344 | |
345 | record_btrace_async_inferior_event_handler | |
346 | = create_async_event_handler (record_btrace_handle_async_inferior_event, | |
db20ebdf | 347 | NULL, "record-btrace"); |
c0272db5 TW |
348 | record_btrace_generating_corefile = 0; |
349 | ||
350 | format = btrace_format_short_string (record_btrace_conf.format); | |
44fbffc6 | 351 | interps_notify_record_changed (current_inferior (), 1, "btrace", format); |
c0272db5 TW |
352 | } |
353 | ||
228f1508 SM |
354 | /* Disable btrace on a set of threads on scope exit. */ |
355 | ||
356 | struct scoped_btrace_disable | |
357 | { | |
358 | scoped_btrace_disable () = default; | |
359 | ||
360 | DISABLE_COPY_AND_ASSIGN (scoped_btrace_disable); | |
361 | ||
362 | ~scoped_btrace_disable () | |
363 | { | |
364 | for (thread_info *tp : m_threads) | |
365 | btrace_disable (tp); | |
366 | } | |
367 | ||
368 | void add_thread (thread_info *thread) | |
369 | { | |
370 | m_threads.push_front (thread); | |
371 | } | |
372 | ||
373 | void discard () | |
374 | { | |
375 | m_threads.clear (); | |
376 | } | |
377 | ||
378 | private: | |
379 | std::forward_list<thread_info *> m_threads; | |
380 | }; | |
381 | ||
d9f719f1 | 382 | /* Open target record-btrace. */ |
afedecd3 | 383 | |
d9f719f1 PA |
384 | static void |
385 | record_btrace_target_open (const char *args, int from_tty) | |
afedecd3 | 386 | { |
228f1508 SM |
387 | /* If we fail to enable btrace for one thread, disable it for the threads for |
388 | which it was successfully enabled. */ | |
389 | scoped_btrace_disable btrace_disable; | |
afedecd3 MM |
390 | |
391 | DEBUG ("open"); | |
392 | ||
8213266a | 393 | record_preopen (); |
afedecd3 | 394 | |
55f6301a | 395 | if (!target_has_execution ()) |
afedecd3 MM |
396 | error (_("The program is not being run.")); |
397 | ||
d89edf9b | 398 | for (thread_info *tp : current_inferior ()->non_exited_threads ()) |
5d5658a1 | 399 | if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num)) |
afedecd3 | 400 | { |
f4abbc16 | 401 | btrace_enable (tp, &record_btrace_conf); |
afedecd3 | 402 | |
228f1508 | 403 | btrace_disable.add_thread (tp); |
afedecd3 MM |
404 | } |
405 | ||
c0272db5 | 406 | record_btrace_push_target (); |
afedecd3 | 407 | |
228f1508 | 408 | btrace_disable.discard (); |
afedecd3 MM |
409 | } |
410 | ||
f6ac5f3d | 411 | /* The stop_recording method of target record-btrace. */ |
afedecd3 | 412 | |
f6ac5f3d PA |
413 | void |
414 | record_btrace_target::stop_recording () | |
afedecd3 | 415 | { |
afedecd3 MM |
416 | DEBUG ("stop recording"); |
417 | ||
418 | record_btrace_auto_disable (); | |
419 | ||
d89edf9b | 420 | for (thread_info *tp : current_inferior ()->non_exited_threads ()) |
afedecd3 MM |
421 | if (tp->btrace.target != NULL) |
422 | btrace_disable (tp); | |
423 | } | |
424 | ||
f6ac5f3d | 425 | /* The disconnect method of target record-btrace. */ |
c0272db5 | 426 | |
f6ac5f3d PA |
427 | void |
428 | record_btrace_target::disconnect (const char *args, | |
429 | int from_tty) | |
c0272db5 | 430 | { |
b6a8c27b | 431 | struct target_ops *beneath = this->beneath (); |
c0272db5 TW |
432 | |
433 | /* Do not stop recording, just clean up GDB side. */ | |
fadf6add | 434 | current_inferior ()->unpush_target (this); |
c0272db5 TW |
435 | |
436 | /* Forward disconnect. */ | |
f6ac5f3d | 437 | beneath->disconnect (args, from_tty); |
c0272db5 TW |
438 | } |
439 | ||
f6ac5f3d | 440 | /* The close method of target record-btrace. */ |
afedecd3 | 441 | |
f6ac5f3d PA |
442 | void |
443 | record_btrace_target::close () | |
afedecd3 | 444 | { |
70ad5bff MM |
445 | if (record_btrace_async_inferior_event_handler != NULL) |
446 | delete_async_event_handler (&record_btrace_async_inferior_event_handler); | |
447 | ||
99c819ee MM |
448 | /* Make sure automatic recording gets disabled even if we did not stop |
449 | recording before closing the record-btrace target. */ | |
450 | record_btrace_auto_disable (); | |
451 | ||
568e808b MM |
452 | /* We should have already stopped recording. |
453 | Tear down btrace in case we have not. */ | |
d89edf9b | 454 | for (thread_info *tp : current_inferior ()->non_exited_threads ()) |
568e808b | 455 | btrace_teardown (tp); |
afedecd3 MM |
456 | } |
457 | ||
f6ac5f3d | 458 | /* The async method of target record-btrace. */ |
b7d2e916 | 459 | |
f6ac5f3d | 460 | void |
4a570176 | 461 | record_btrace_target::async (bool enable) |
b7d2e916 | 462 | { |
6a3753b3 | 463 | if (enable) |
b7d2e916 PA |
464 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
465 | else | |
466 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
467 | ||
b6a8c27b | 468 | this->beneath ()->async (enable); |
b7d2e916 PA |
469 | } |
470 | ||
d33501a5 MM |
471 | /* Adjusts the size and returns a human readable size suffix. */ |
472 | ||
473 | static const char * | |
474 | record_btrace_adjust_size (unsigned int *size) | |
475 | { | |
476 | unsigned int sz; | |
477 | ||
478 | sz = *size; | |
479 | ||
480 | if ((sz & ((1u << 30) - 1)) == 0) | |
481 | { | |
482 | *size = sz >> 30; | |
483 | return "GB"; | |
484 | } | |
485 | else if ((sz & ((1u << 20) - 1)) == 0) | |
486 | { | |
487 | *size = sz >> 20; | |
488 | return "MB"; | |
489 | } | |
490 | else if ((sz & ((1u << 10) - 1)) == 0) | |
491 | { | |
492 | *size = sz >> 10; | |
493 | return "kB"; | |
494 | } | |
495 | else | |
496 | return ""; | |
497 | } | |
498 | ||
499 | /* Print a BTS configuration. */ | |
500 | ||
501 | static void | |
502 | record_btrace_print_bts_conf (const struct btrace_config_bts *conf) | |
503 | { | |
504 | const char *suffix; | |
505 | unsigned int size; | |
506 | ||
507 | size = conf->size; | |
508 | if (size > 0) | |
509 | { | |
510 | suffix = record_btrace_adjust_size (&size); | |
6cb06a8c | 511 | gdb_printf (_("Buffer size: %u%s.\n"), size, suffix); |
d33501a5 MM |
512 | } |
513 | } | |
514 | ||
bc504a31 | 515 | /* Print an Intel Processor Trace configuration. */ |
b20a6524 MM |
516 | |
517 | static void | |
518 | record_btrace_print_pt_conf (const struct btrace_config_pt *conf) | |
519 | { | |
520 | const char *suffix; | |
521 | unsigned int size; | |
522 | ||
523 | size = conf->size; | |
524 | if (size > 0) | |
525 | { | |
526 | suffix = record_btrace_adjust_size (&size); | |
6cb06a8c | 527 | gdb_printf (_("Buffer size: %u%s.\n"), size, suffix); |
b20a6524 MM |
528 | } |
529 | } | |
530 | ||
d33501a5 MM |
531 | /* Print a branch tracing configuration. */ |
532 | ||
533 | static void | |
534 | record_btrace_print_conf (const struct btrace_config *conf) | |
535 | { | |
6cb06a8c TT |
536 | gdb_printf (_("Recording format: %s.\n"), |
537 | btrace_format_string (conf->format)); | |
d33501a5 MM |
538 | |
539 | switch (conf->format) | |
540 | { | |
541 | case BTRACE_FORMAT_NONE: | |
542 | return; | |
543 | ||
544 | case BTRACE_FORMAT_BTS: | |
545 | record_btrace_print_bts_conf (&conf->bts); | |
546 | return; | |
b20a6524 MM |
547 | |
548 | case BTRACE_FORMAT_PT: | |
549 | record_btrace_print_pt_conf (&conf->pt); | |
550 | return; | |
d33501a5 MM |
551 | } |
552 | ||
f34652de | 553 | internal_error (_("Unknown branch trace format.")); |
d33501a5 MM |
554 | } |
555 | ||
f6ac5f3d | 556 | /* The info_record method of target record-btrace. */ |
afedecd3 | 557 | |
f6ac5f3d PA |
558 | void |
559 | record_btrace_target::info_record () | |
afedecd3 MM |
560 | { |
561 | struct btrace_thread_info *btinfo; | |
f4abbc16 | 562 | const struct btrace_config *conf; |
afedecd3 | 563 | struct thread_info *tp; |
31fd9caa | 564 | unsigned int insns, calls, gaps; |
afedecd3 MM |
565 | |
566 | DEBUG ("info"); | |
567 | ||
5b6d1e4f | 568 | if (inferior_ptid == null_ptid) |
afedecd3 MM |
569 | error (_("No thread.")); |
570 | ||
5b6d1e4f PA |
571 | tp = inferior_thread (); |
572 | ||
cd4007e4 MM |
573 | validate_registers_access (); |
574 | ||
f4abbc16 MM |
575 | btinfo = &tp->btrace; |
576 | ||
f6ac5f3d | 577 | conf = ::btrace_conf (btinfo); |
f4abbc16 | 578 | if (conf != NULL) |
d33501a5 | 579 | record_btrace_print_conf (conf); |
f4abbc16 | 580 | |
4a4495d6 | 581 | btrace_fetch (tp, record_btrace_get_cpu ()); |
afedecd3 | 582 | |
23a7fe75 MM |
583 | insns = 0; |
584 | calls = 0; | |
31fd9caa | 585 | gaps = 0; |
23a7fe75 | 586 | |
6e07b1d2 | 587 | if (!btrace_is_empty (tp)) |
23a7fe75 MM |
588 | { |
589 | struct btrace_call_iterator call; | |
590 | struct btrace_insn_iterator insn; | |
591 | ||
592 | btrace_call_end (&call, btinfo); | |
593 | btrace_call_prev (&call, 1); | |
5de9129b | 594 | calls = btrace_call_number (&call); |
23a7fe75 MM |
595 | |
596 | btrace_insn_end (&insn, btinfo); | |
5de9129b | 597 | insns = btrace_insn_number (&insn); |
31fd9caa | 598 | |
69090cee TW |
599 | /* If the last instruction is not a gap, it is the current instruction |
600 | that is not actually part of the record. */ | |
601 | if (btrace_insn_get (&insn) != NULL) | |
602 | insns -= 1; | |
31fd9caa MM |
603 | |
604 | gaps = btinfo->ngaps; | |
23a7fe75 | 605 | } |
afedecd3 | 606 | |
6cb06a8c TT |
607 | gdb_printf (_("Recorded %u instructions in %u functions (%u gaps) " |
608 | "for thread %s (%s).\n"), insns, calls, gaps, | |
609 | print_thread_id (tp), | |
610 | target_pid_to_str (tp->ptid).c_str ()); | |
07bbe694 MM |
611 | |
612 | if (btrace_is_replaying (tp)) | |
6cb06a8c TT |
613 | gdb_printf (_("Replay in progress. At instruction %u.\n"), |
614 | btrace_insn_number (btinfo->replay)); | |
afedecd3 MM |
615 | } |
616 | ||
31fd9caa MM |
617 | /* Print a decode error. */ |
618 | ||
619 | static void | |
620 | btrace_ui_out_decode_error (struct ui_out *uiout, int errcode, | |
621 | enum btrace_format format) | |
622 | { | |
508352a9 | 623 | const char *errstr = btrace_decode_error (format, errcode); |
31fd9caa | 624 | |
112e8700 | 625 | uiout->text (_("[")); |
508352a9 TW |
626 | /* ERRCODE > 0 indicates notifications on BTRACE_FORMAT_PT. */ |
627 | if (!(format == BTRACE_FORMAT_PT && errcode > 0)) | |
31fd9caa | 628 | { |
112e8700 | 629 | uiout->text (_("decode error (")); |
381befee | 630 | uiout->field_signed ("errcode", errcode); |
112e8700 | 631 | uiout->text (_("): ")); |
31fd9caa | 632 | } |
112e8700 SM |
633 | uiout->text (errstr); |
634 | uiout->text (_("]\n")); | |
31fd9caa MM |
635 | } |
636 | ||
f94cc897 MM |
637 | /* A range of source lines. */ |
638 | ||
639 | struct btrace_line_range | |
640 | { | |
641 | /* The symtab this line is from. */ | |
642 | struct symtab *symtab; | |
643 | ||
644 | /* The first line (inclusive). */ | |
645 | int begin; | |
646 | ||
647 | /* The last line (exclusive). */ | |
648 | int end; | |
649 | }; | |
650 | ||
651 | /* Construct a line range. */ | |
652 | ||
653 | static struct btrace_line_range | |
654 | btrace_mk_line_range (struct symtab *symtab, int begin, int end) | |
655 | { | |
656 | struct btrace_line_range range; | |
657 | ||
658 | range.symtab = symtab; | |
659 | range.begin = begin; | |
660 | range.end = end; | |
661 | ||
662 | return range; | |
663 | } | |
664 | ||
665 | /* Add a line to a line range. */ | |
666 | ||
667 | static struct btrace_line_range | |
668 | btrace_line_range_add (struct btrace_line_range range, int line) | |
669 | { | |
670 | if (range.end <= range.begin) | |
671 | { | |
672 | /* This is the first entry. */ | |
673 | range.begin = line; | |
674 | range.end = line + 1; | |
675 | } | |
676 | else if (line < range.begin) | |
677 | range.begin = line; | |
678 | else if (range.end < line) | |
679 | range.end = line; | |
680 | ||
681 | return range; | |
682 | } | |
683 | ||
684 | /* Return non-zero if RANGE is empty, zero otherwise. */ | |
685 | ||
686 | static int | |
687 | btrace_line_range_is_empty (struct btrace_line_range range) | |
688 | { | |
689 | return range.end <= range.begin; | |
690 | } | |
691 | ||
692 | /* Return non-zero if LHS contains RHS, zero otherwise. */ | |
693 | ||
694 | static int | |
695 | btrace_line_range_contains_range (struct btrace_line_range lhs, | |
696 | struct btrace_line_range rhs) | |
697 | { | |
698 | return ((lhs.symtab == rhs.symtab) | |
699 | && (lhs.begin <= rhs.begin) | |
700 | && (rhs.end <= lhs.end)); | |
701 | } | |
702 | ||
703 | /* Find the line range associated with PC. */ | |
704 | ||
705 | static struct btrace_line_range | |
706 | btrace_find_line_range (CORE_ADDR pc) | |
707 | { | |
708 | struct btrace_line_range range; | |
977a0c16 TT |
709 | const linetable_entry *lines; |
710 | const linetable *ltable; | |
f94cc897 MM |
711 | struct symtab *symtab; |
712 | int nlines, i; | |
713 | ||
714 | symtab = find_pc_line_symtab (pc); | |
715 | if (symtab == NULL) | |
716 | return btrace_mk_line_range (NULL, 0, 0); | |
717 | ||
5b607461 | 718 | ltable = symtab->linetable (); |
f94cc897 MM |
719 | if (ltable == NULL) |
720 | return btrace_mk_line_range (symtab, 0, 0); | |
721 | ||
722 | nlines = ltable->nitems; | |
723 | lines = ltable->item; | |
724 | if (nlines <= 0) | |
725 | return btrace_mk_line_range (symtab, 0, 0); | |
726 | ||
1acc9dca | 727 | struct objfile *objfile = symtab->compunit ()->objfile (); |
48e0f38c TT |
728 | unrelocated_addr unrel_pc |
729 | = unrelocated_addr (pc - objfile->text_section_offset ()); | |
1acc9dca | 730 | |
f94cc897 MM |
731 | range = btrace_mk_line_range (symtab, 0, 0); |
732 | for (i = 0; i < nlines - 1; i++) | |
733 | { | |
8c95582d AB |
734 | /* The test of is_stmt here was added when the is_stmt field was |
735 | introduced to the 'struct linetable_entry' structure. This | |
736 | ensured that this loop maintained the same behaviour as before we | |
737 | introduced is_stmt. That said, it might be that we would be | |
738 | better off not checking is_stmt here, this would lead to us | |
739 | possibly adding more line numbers to the range. At the time this | |
740 | change was made I was unsure how to test this so chose to go with | |
741 | maintaining the existing experience. */ | |
0434c3ef | 742 | if (lines[i].unrelocated_pc () == unrel_pc && lines[i].line != 0 |
ddc6677b | 743 | && lines[i].is_stmt) |
f94cc897 MM |
744 | range = btrace_line_range_add (range, lines[i].line); |
745 | } | |
746 | ||
747 | return range; | |
748 | } | |
749 | ||
750 | /* Print source lines in LINES to UIOUT. | |
751 | ||
752 | UI_ITEM_CHAIN is a cleanup chain for the last source line and the | |
753 | instructions corresponding to that source line. When printing a new source | |
754 | line, we do the cleanups for the open chain and open a new cleanup chain for | |
755 | the new source line. If the source line range in LINES is not empty, this | |
756 | function will leave the cleanup chain for the last printed source line open | |
757 | so instructions can be added to it. */ | |
758 | ||
759 | static void | |
760 | btrace_print_lines (struct btrace_line_range lines, struct ui_out *uiout, | |
7ea78b59 SM |
761 | gdb::optional<ui_out_emit_tuple> *src_and_asm_tuple, |
762 | gdb::optional<ui_out_emit_list> *asm_list, | |
763 | gdb_disassembly_flags flags) | |
f94cc897 | 764 | { |
8d297bbf | 765 | print_source_lines_flags psl_flags; |
f94cc897 | 766 | |
f94cc897 MM |
767 | if (flags & DISASSEMBLY_FILENAME) |
768 | psl_flags |= PRINT_SOURCE_LINES_FILENAME; | |
769 | ||
7ea78b59 | 770 | for (int line = lines.begin; line < lines.end; ++line) |
f94cc897 | 771 | { |
7ea78b59 | 772 | asm_list->reset (); |
f94cc897 | 773 | |
7ea78b59 | 774 | src_and_asm_tuple->emplace (uiout, "src_and_asm_line"); |
f94cc897 MM |
775 | |
776 | print_source_lines (lines.symtab, line, line + 1, psl_flags); | |
777 | ||
7ea78b59 | 778 | asm_list->emplace (uiout, "line_asm_insn"); |
f94cc897 MM |
779 | } |
780 | } | |
781 | ||
afedecd3 MM |
782 | /* Disassemble a section of the recorded instruction trace. */ |
783 | ||
784 | static void | |
23a7fe75 | 785 | btrace_insn_history (struct ui_out *uiout, |
31fd9caa | 786 | const struct btrace_thread_info *btinfo, |
23a7fe75 | 787 | const struct btrace_insn_iterator *begin, |
9a24775b PA |
788 | const struct btrace_insn_iterator *end, |
789 | gdb_disassembly_flags flags) | |
afedecd3 | 790 | { |
9a24775b PA |
791 | DEBUG ("itrace (0x%x): [%u; %u)", (unsigned) flags, |
792 | btrace_insn_number (begin), btrace_insn_number (end)); | |
afedecd3 | 793 | |
f94cc897 MM |
794 | flags |= DISASSEMBLY_SPECULATIVE; |
795 | ||
99d9c3b9 | 796 | gdbarch *gdbarch = current_inferior ()->arch (); |
7ea78b59 | 797 | btrace_line_range last_lines = btrace_mk_line_range (NULL, 0, 0); |
f94cc897 | 798 | |
7ea78b59 | 799 | ui_out_emit_list list_emitter (uiout, "asm_insns"); |
f94cc897 | 800 | |
7ea78b59 SM |
801 | gdb::optional<ui_out_emit_tuple> src_and_asm_tuple; |
802 | gdb::optional<ui_out_emit_list> asm_list; | |
afedecd3 | 803 | |
046bebe1 | 804 | gdb_pretty_print_disassembler disasm (gdbarch, uiout); |
8b172ce7 | 805 | |
7ea78b59 | 806 | for (btrace_insn_iterator it = *begin; btrace_insn_cmp (&it, end) != 0; |
dda83cd7 | 807 | btrace_insn_next (&it, 1)) |
afedecd3 | 808 | { |
23a7fe75 MM |
809 | const struct btrace_insn *insn; |
810 | ||
811 | insn = btrace_insn_get (&it); | |
812 | ||
31fd9caa MM |
813 | /* A NULL instruction indicates a gap in the trace. */ |
814 | if (insn == NULL) | |
815 | { | |
816 | const struct btrace_config *conf; | |
817 | ||
818 | conf = btrace_conf (btinfo); | |
afedecd3 | 819 | |
31fd9caa MM |
820 | /* We have trace so we must have a configuration. */ |
821 | gdb_assert (conf != NULL); | |
822 | ||
69090cee TW |
823 | uiout->field_fmt ("insn-number", "%u", |
824 | btrace_insn_number (&it)); | |
825 | uiout->text ("\t"); | |
826 | ||
827 | btrace_ui_out_decode_error (uiout, btrace_insn_get_error (&it), | |
31fd9caa MM |
828 | conf->format); |
829 | } | |
830 | else | |
831 | { | |
f94cc897 | 832 | struct disasm_insn dinsn; |
da8c46d2 | 833 | |
f94cc897 | 834 | if ((flags & DISASSEMBLY_SOURCE) != 0) |
da8c46d2 | 835 | { |
f94cc897 MM |
836 | struct btrace_line_range lines; |
837 | ||
838 | lines = btrace_find_line_range (insn->pc); | |
839 | if (!btrace_line_range_is_empty (lines) | |
840 | && !btrace_line_range_contains_range (last_lines, lines)) | |
841 | { | |
7ea78b59 SM |
842 | btrace_print_lines (lines, uiout, &src_and_asm_tuple, &asm_list, |
843 | flags); | |
f94cc897 MM |
844 | last_lines = lines; |
845 | } | |
7ea78b59 | 846 | else if (!src_and_asm_tuple.has_value ()) |
f94cc897 | 847 | { |
7ea78b59 SM |
848 | gdb_assert (!asm_list.has_value ()); |
849 | ||
850 | src_and_asm_tuple.emplace (uiout, "src_and_asm_line"); | |
851 | ||
f94cc897 | 852 | /* No source information. */ |
7ea78b59 | 853 | asm_list.emplace (uiout, "line_asm_insn"); |
f94cc897 MM |
854 | } |
855 | ||
7ea78b59 SM |
856 | gdb_assert (src_and_asm_tuple.has_value ()); |
857 | gdb_assert (asm_list.has_value ()); | |
da8c46d2 | 858 | } |
da8c46d2 | 859 | |
f94cc897 MM |
860 | memset (&dinsn, 0, sizeof (dinsn)); |
861 | dinsn.number = btrace_insn_number (&it); | |
862 | dinsn.addr = insn->pc; | |
31fd9caa | 863 | |
da8c46d2 | 864 | if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) |
f94cc897 | 865 | dinsn.is_speculative = 1; |
da8c46d2 | 866 | |
046bebe1 | 867 | disasm.pretty_print_insn (&dinsn, flags); |
31fd9caa | 868 | } |
afedecd3 MM |
869 | } |
870 | } | |
871 | ||
f6ac5f3d | 872 | /* The insn_history method of target record-btrace. */ |
afedecd3 | 873 | |
f6ac5f3d PA |
874 | void |
875 | record_btrace_target::insn_history (int size, gdb_disassembly_flags flags) | |
afedecd3 MM |
876 | { |
877 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
878 | struct btrace_insn_history *history; |
879 | struct btrace_insn_iterator begin, end; | |
afedecd3 | 880 | struct ui_out *uiout; |
23a7fe75 | 881 | unsigned int context, covered; |
afedecd3 MM |
882 | |
883 | uiout = current_uiout; | |
2e783024 | 884 | ui_out_emit_tuple tuple_emitter (uiout, "insn history"); |
afedecd3 | 885 | context = abs (size); |
afedecd3 MM |
886 | if (context == 0) |
887 | error (_("Bad record instruction-history-size.")); | |
888 | ||
23a7fe75 MM |
889 | btinfo = require_btrace (); |
890 | history = btinfo->insn_history; | |
891 | if (history == NULL) | |
afedecd3 | 892 | { |
07bbe694 | 893 | struct btrace_insn_iterator *replay; |
afedecd3 | 894 | |
9a24775b | 895 | DEBUG ("insn-history (0x%x): %d", (unsigned) flags, size); |
afedecd3 | 896 | |
07bbe694 MM |
897 | /* If we're replaying, we start at the replay position. Otherwise, we |
898 | start at the tail of the trace. */ | |
899 | replay = btinfo->replay; | |
900 | if (replay != NULL) | |
901 | begin = *replay; | |
902 | else | |
903 | btrace_insn_end (&begin, btinfo); | |
904 | ||
905 | /* We start from here and expand in the requested direction. Then we | |
906 | expand in the other direction, as well, to fill up any remaining | |
907 | context. */ | |
908 | end = begin; | |
909 | if (size < 0) | |
910 | { | |
911 | /* We want the current position covered, as well. */ | |
912 | covered = btrace_insn_next (&end, 1); | |
913 | covered += btrace_insn_prev (&begin, context - covered); | |
914 | covered += btrace_insn_next (&end, context - covered); | |
915 | } | |
916 | else | |
917 | { | |
918 | covered = btrace_insn_next (&end, context); | |
919 | covered += btrace_insn_prev (&begin, context - covered); | |
920 | } | |
afedecd3 MM |
921 | } |
922 | else | |
923 | { | |
23a7fe75 MM |
924 | begin = history->begin; |
925 | end = history->end; | |
afedecd3 | 926 | |
9a24775b | 927 | DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", (unsigned) flags, size, |
23a7fe75 | 928 | btrace_insn_number (&begin), btrace_insn_number (&end)); |
afedecd3 | 929 | |
23a7fe75 MM |
930 | if (size < 0) |
931 | { | |
932 | end = begin; | |
933 | covered = btrace_insn_prev (&begin, context); | |
934 | } | |
935 | else | |
936 | { | |
937 | begin = end; | |
938 | covered = btrace_insn_next (&end, context); | |
939 | } | |
afedecd3 MM |
940 | } |
941 | ||
23a7fe75 | 942 | if (covered > 0) |
31fd9caa | 943 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
944 | else |
945 | { | |
946 | if (size < 0) | |
6cb06a8c | 947 | gdb_printf (_("At the start of the branch trace record.\n")); |
23a7fe75 | 948 | else |
6cb06a8c | 949 | gdb_printf (_("At the end of the branch trace record.\n")); |
23a7fe75 | 950 | } |
afedecd3 | 951 | |
23a7fe75 | 952 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
953 | } |
954 | ||
f6ac5f3d | 955 | /* The insn_history_range method of target record-btrace. */ |
afedecd3 | 956 | |
f6ac5f3d PA |
957 | void |
958 | record_btrace_target::insn_history_range (ULONGEST from, ULONGEST to, | |
959 | gdb_disassembly_flags flags) | |
afedecd3 MM |
960 | { |
961 | struct btrace_thread_info *btinfo; | |
23a7fe75 | 962 | struct btrace_insn_iterator begin, end; |
afedecd3 | 963 | struct ui_out *uiout; |
23a7fe75 MM |
964 | unsigned int low, high; |
965 | int found; | |
afedecd3 MM |
966 | |
967 | uiout = current_uiout; | |
2e783024 | 968 | ui_out_emit_tuple tuple_emitter (uiout, "insn history"); |
23a7fe75 MM |
969 | low = from; |
970 | high = to; | |
afedecd3 | 971 | |
9a24775b | 972 | DEBUG ("insn-history (0x%x): [%u; %u)", (unsigned) flags, low, high); |
afedecd3 MM |
973 | |
974 | /* Check for wrap-arounds. */ | |
23a7fe75 | 975 | if (low != from || high != to) |
afedecd3 MM |
976 | error (_("Bad range.")); |
977 | ||
0688d04e | 978 | if (high < low) |
afedecd3 MM |
979 | error (_("Bad range.")); |
980 | ||
23a7fe75 | 981 | btinfo = require_btrace (); |
afedecd3 | 982 | |
23a7fe75 MM |
983 | found = btrace_find_insn_by_number (&begin, btinfo, low); |
984 | if (found == 0) | |
985 | error (_("Range out of bounds.")); | |
afedecd3 | 986 | |
23a7fe75 MM |
987 | found = btrace_find_insn_by_number (&end, btinfo, high); |
988 | if (found == 0) | |
0688d04e MM |
989 | { |
990 | /* Silently truncate the range. */ | |
991 | btrace_insn_end (&end, btinfo); | |
992 | } | |
993 | else | |
994 | { | |
995 | /* We want both begin and end to be inclusive. */ | |
996 | btrace_insn_next (&end, 1); | |
997 | } | |
afedecd3 | 998 | |
31fd9caa | 999 | btrace_insn_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1000 | btrace_set_insn_history (btinfo, &begin, &end); |
afedecd3 MM |
1001 | } |
1002 | ||
f6ac5f3d | 1003 | /* The insn_history_from method of target record-btrace. */ |
afedecd3 | 1004 | |
f6ac5f3d PA |
1005 | void |
1006 | record_btrace_target::insn_history_from (ULONGEST from, int size, | |
1007 | gdb_disassembly_flags flags) | |
afedecd3 MM |
1008 | { |
1009 | ULONGEST begin, end, context; | |
1010 | ||
1011 | context = abs (size); | |
0688d04e MM |
1012 | if (context == 0) |
1013 | error (_("Bad record instruction-history-size.")); | |
afedecd3 MM |
1014 | |
1015 | if (size < 0) | |
1016 | { | |
1017 | end = from; | |
1018 | ||
1019 | if (from < context) | |
1020 | begin = 0; | |
1021 | else | |
0688d04e | 1022 | begin = from - context + 1; |
afedecd3 MM |
1023 | } |
1024 | else | |
1025 | { | |
1026 | begin = from; | |
0688d04e | 1027 | end = from + context - 1; |
afedecd3 MM |
1028 | |
1029 | /* Check for wrap-around. */ | |
1030 | if (end < begin) | |
1031 | end = ULONGEST_MAX; | |
1032 | } | |
1033 | ||
f6ac5f3d | 1034 | insn_history_range (begin, end, flags); |
afedecd3 MM |
1035 | } |
1036 | ||
1037 | /* Print the instruction number range for a function call history line. */ | |
1038 | ||
1039 | static void | |
23a7fe75 MM |
1040 | btrace_call_history_insn_range (struct ui_out *uiout, |
1041 | const struct btrace_function *bfun) | |
afedecd3 | 1042 | { |
7acbe133 MM |
1043 | unsigned int begin, end, size; |
1044 | ||
0860c437 | 1045 | size = bfun->insn.size (); |
7acbe133 | 1046 | gdb_assert (size > 0); |
afedecd3 | 1047 | |
23a7fe75 | 1048 | begin = bfun->insn_offset; |
7acbe133 | 1049 | end = begin + size - 1; |
afedecd3 | 1050 | |
1f77b012 | 1051 | uiout->field_unsigned ("insn begin", begin); |
112e8700 | 1052 | uiout->text (","); |
1f77b012 | 1053 | uiout->field_unsigned ("insn end", end); |
afedecd3 MM |
1054 | } |
1055 | ||
ce0dfbea MM |
1056 | /* Compute the lowest and highest source line for the instructions in BFUN |
1057 | and return them in PBEGIN and PEND. | |
1058 | Ignore instructions that can't be mapped to BFUN, e.g. instructions that | |
1059 | result from inlining or macro expansion. */ | |
1060 | ||
1061 | static void | |
1062 | btrace_compute_src_line_range (const struct btrace_function *bfun, | |
1063 | int *pbegin, int *pend) | |
1064 | { | |
ce0dfbea MM |
1065 | struct symtab *symtab; |
1066 | struct symbol *sym; | |
ce0dfbea MM |
1067 | int begin, end; |
1068 | ||
1069 | begin = INT_MAX; | |
1070 | end = INT_MIN; | |
1071 | ||
1072 | sym = bfun->sym; | |
1073 | if (sym == NULL) | |
1074 | goto out; | |
1075 | ||
4206d69e | 1076 | symtab = sym->symtab (); |
ce0dfbea | 1077 | |
0860c437 | 1078 | for (const btrace_insn &insn : bfun->insn) |
ce0dfbea MM |
1079 | { |
1080 | struct symtab_and_line sal; | |
1081 | ||
0860c437 | 1082 | sal = find_pc_line (insn.pc, 0); |
ce0dfbea MM |
1083 | if (sal.symtab != symtab || sal.line == 0) |
1084 | continue; | |
1085 | ||
325fac50 PA |
1086 | begin = std::min (begin, sal.line); |
1087 | end = std::max (end, sal.line); | |
ce0dfbea MM |
1088 | } |
1089 | ||
1090 | out: | |
1091 | *pbegin = begin; | |
1092 | *pend = end; | |
1093 | } | |
1094 | ||
afedecd3 MM |
1095 | /* Print the source line information for a function call history line. */ |
1096 | ||
1097 | static void | |
23a7fe75 MM |
1098 | btrace_call_history_src_line (struct ui_out *uiout, |
1099 | const struct btrace_function *bfun) | |
afedecd3 MM |
1100 | { |
1101 | struct symbol *sym; | |
23a7fe75 | 1102 | int begin, end; |
afedecd3 MM |
1103 | |
1104 | sym = bfun->sym; | |
1105 | if (sym == NULL) | |
1106 | return; | |
1107 | ||
112e8700 | 1108 | uiout->field_string ("file", |
4206d69e | 1109 | symtab_to_filename_for_display (sym->symtab ()), |
e43b10e1 | 1110 | file_name_style.style ()); |
afedecd3 | 1111 | |
ce0dfbea | 1112 | btrace_compute_src_line_range (bfun, &begin, &end); |
23a7fe75 | 1113 | if (end < begin) |
afedecd3 MM |
1114 | return; |
1115 | ||
112e8700 | 1116 | uiout->text (":"); |
381befee | 1117 | uiout->field_signed ("min line", begin); |
afedecd3 | 1118 | |
23a7fe75 | 1119 | if (end == begin) |
afedecd3 MM |
1120 | return; |
1121 | ||
112e8700 | 1122 | uiout->text (","); |
381befee | 1123 | uiout->field_signed ("max line", end); |
afedecd3 MM |
1124 | } |
1125 | ||
0b722aec MM |
1126 | /* Get the name of a branch trace function. */ |
1127 | ||
1128 | static const char * | |
1129 | btrace_get_bfun_name (const struct btrace_function *bfun) | |
1130 | { | |
1131 | struct minimal_symbol *msym; | |
1132 | struct symbol *sym; | |
1133 | ||
1134 | if (bfun == NULL) | |
1135 | return "??"; | |
1136 | ||
1137 | msym = bfun->msym; | |
1138 | sym = bfun->sym; | |
1139 | ||
1140 | if (sym != NULL) | |
987012b8 | 1141 | return sym->print_name (); |
0b722aec | 1142 | else if (msym != NULL) |
c9d95fa3 | 1143 | return msym->print_name (); |
0b722aec MM |
1144 | else |
1145 | return "??"; | |
1146 | } | |
1147 | ||
afedecd3 MM |
1148 | /* Disassemble a section of the recorded function trace. */ |
1149 | ||
1150 | static void | |
23a7fe75 | 1151 | btrace_call_history (struct ui_out *uiout, |
8710b709 | 1152 | const struct btrace_thread_info *btinfo, |
23a7fe75 MM |
1153 | const struct btrace_call_iterator *begin, |
1154 | const struct btrace_call_iterator *end, | |
8d297bbf | 1155 | int int_flags) |
afedecd3 | 1156 | { |
23a7fe75 | 1157 | struct btrace_call_iterator it; |
8d297bbf | 1158 | record_print_flags flags = (enum record_print_flag) int_flags; |
afedecd3 | 1159 | |
8d297bbf | 1160 | DEBUG ("ftrace (0x%x): [%u; %u)", int_flags, btrace_call_number (begin), |
23a7fe75 | 1161 | btrace_call_number (end)); |
afedecd3 | 1162 | |
23a7fe75 | 1163 | for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1)) |
afedecd3 | 1164 | { |
23a7fe75 MM |
1165 | const struct btrace_function *bfun; |
1166 | struct minimal_symbol *msym; | |
1167 | struct symbol *sym; | |
1168 | ||
1169 | bfun = btrace_call_get (&it); | |
23a7fe75 | 1170 | sym = bfun->sym; |
0b722aec | 1171 | msym = bfun->msym; |
23a7fe75 | 1172 | |
afedecd3 | 1173 | /* Print the function index. */ |
1f77b012 | 1174 | uiout->field_unsigned ("index", bfun->number); |
112e8700 | 1175 | uiout->text ("\t"); |
afedecd3 | 1176 | |
31fd9caa MM |
1177 | /* Indicate gaps in the trace. */ |
1178 | if (bfun->errcode != 0) | |
1179 | { | |
1180 | const struct btrace_config *conf; | |
1181 | ||
1182 | conf = btrace_conf (btinfo); | |
1183 | ||
1184 | /* We have trace so we must have a configuration. */ | |
1185 | gdb_assert (conf != NULL); | |
1186 | ||
1187 | btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format); | |
1188 | ||
1189 | continue; | |
1190 | } | |
1191 | ||
8710b709 MM |
1192 | if ((flags & RECORD_PRINT_INDENT_CALLS) != 0) |
1193 | { | |
1194 | int level = bfun->level + btinfo->level, i; | |
1195 | ||
1196 | for (i = 0; i < level; ++i) | |
112e8700 | 1197 | uiout->text (" "); |
8710b709 MM |
1198 | } |
1199 | ||
1200 | if (sym != NULL) | |
987012b8 | 1201 | uiout->field_string ("function", sym->print_name (), |
e43b10e1 | 1202 | function_name_style.style ()); |
8710b709 | 1203 | else if (msym != NULL) |
c9d95fa3 | 1204 | uiout->field_string ("function", msym->print_name (), |
e43b10e1 | 1205 | function_name_style.style ()); |
112e8700 | 1206 | else if (!uiout->is_mi_like_p ()) |
cbe56571 | 1207 | uiout->field_string ("function", "??", |
e43b10e1 | 1208 | function_name_style.style ()); |
8710b709 | 1209 | |
1e038f67 | 1210 | if ((flags & RECORD_PRINT_INSN_RANGE) != 0) |
afedecd3 | 1211 | { |
112e8700 | 1212 | uiout->text (_("\tinst ")); |
23a7fe75 | 1213 | btrace_call_history_insn_range (uiout, bfun); |
afedecd3 MM |
1214 | } |
1215 | ||
1e038f67 | 1216 | if ((flags & RECORD_PRINT_SRC_LINE) != 0) |
afedecd3 | 1217 | { |
112e8700 | 1218 | uiout->text (_("\tat ")); |
23a7fe75 | 1219 | btrace_call_history_src_line (uiout, bfun); |
afedecd3 MM |
1220 | } |
1221 | ||
112e8700 | 1222 | uiout->text ("\n"); |
afedecd3 MM |
1223 | } |
1224 | } | |
1225 | ||
f6ac5f3d | 1226 | /* The call_history method of target record-btrace. */ |
afedecd3 | 1227 | |
f6ac5f3d PA |
1228 | void |
1229 | record_btrace_target::call_history (int size, record_print_flags flags) | |
afedecd3 MM |
1230 | { |
1231 | struct btrace_thread_info *btinfo; | |
23a7fe75 MM |
1232 | struct btrace_call_history *history; |
1233 | struct btrace_call_iterator begin, end; | |
afedecd3 | 1234 | struct ui_out *uiout; |
23a7fe75 | 1235 | unsigned int context, covered; |
afedecd3 MM |
1236 | |
1237 | uiout = current_uiout; | |
2e783024 | 1238 | ui_out_emit_tuple tuple_emitter (uiout, "insn history"); |
afedecd3 | 1239 | context = abs (size); |
afedecd3 MM |
1240 | if (context == 0) |
1241 | error (_("Bad record function-call-history-size.")); | |
1242 | ||
23a7fe75 MM |
1243 | btinfo = require_btrace (); |
1244 | history = btinfo->call_history; | |
1245 | if (history == NULL) | |
afedecd3 | 1246 | { |
07bbe694 | 1247 | struct btrace_insn_iterator *replay; |
afedecd3 | 1248 | |
0cb7c7b0 | 1249 | DEBUG ("call-history (0x%x): %d", (int) flags, size); |
afedecd3 | 1250 | |
07bbe694 MM |
1251 | /* If we're replaying, we start at the replay position. Otherwise, we |
1252 | start at the tail of the trace. */ | |
1253 | replay = btinfo->replay; | |
1254 | if (replay != NULL) | |
1255 | { | |
07bbe694 | 1256 | begin.btinfo = btinfo; |
a0f1b963 | 1257 | begin.index = replay->call_index; |
07bbe694 MM |
1258 | } |
1259 | else | |
1260 | btrace_call_end (&begin, btinfo); | |
1261 | ||
1262 | /* We start from here and expand in the requested direction. Then we | |
1263 | expand in the other direction, as well, to fill up any remaining | |
1264 | context. */ | |
1265 | end = begin; | |
1266 | if (size < 0) | |
1267 | { | |
1268 | /* We want the current position covered, as well. */ | |
1269 | covered = btrace_call_next (&end, 1); | |
1270 | covered += btrace_call_prev (&begin, context - covered); | |
1271 | covered += btrace_call_next (&end, context - covered); | |
1272 | } | |
1273 | else | |
1274 | { | |
1275 | covered = btrace_call_next (&end, context); | |
1276 | covered += btrace_call_prev (&begin, context- covered); | |
1277 | } | |
afedecd3 MM |
1278 | } |
1279 | else | |
1280 | { | |
23a7fe75 MM |
1281 | begin = history->begin; |
1282 | end = history->end; | |
afedecd3 | 1283 | |
0cb7c7b0 | 1284 | DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", (int) flags, size, |
23a7fe75 | 1285 | btrace_call_number (&begin), btrace_call_number (&end)); |
afedecd3 | 1286 | |
23a7fe75 MM |
1287 | if (size < 0) |
1288 | { | |
1289 | end = begin; | |
1290 | covered = btrace_call_prev (&begin, context); | |
1291 | } | |
1292 | else | |
1293 | { | |
1294 | begin = end; | |
1295 | covered = btrace_call_next (&end, context); | |
1296 | } | |
afedecd3 MM |
1297 | } |
1298 | ||
23a7fe75 | 1299 | if (covered > 0) |
8710b709 | 1300 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 MM |
1301 | else |
1302 | { | |
1303 | if (size < 0) | |
6cb06a8c | 1304 | gdb_printf (_("At the start of the branch trace record.\n")); |
23a7fe75 | 1305 | else |
6cb06a8c | 1306 | gdb_printf (_("At the end of the branch trace record.\n")); |
23a7fe75 | 1307 | } |
afedecd3 | 1308 | |
23a7fe75 | 1309 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1310 | } |
1311 | ||
f6ac5f3d | 1312 | /* The call_history_range method of target record-btrace. */ |
afedecd3 | 1313 | |
f6ac5f3d PA |
1314 | void |
1315 | record_btrace_target::call_history_range (ULONGEST from, ULONGEST to, | |
1316 | record_print_flags flags) | |
afedecd3 MM |
1317 | { |
1318 | struct btrace_thread_info *btinfo; | |
23a7fe75 | 1319 | struct btrace_call_iterator begin, end; |
afedecd3 | 1320 | struct ui_out *uiout; |
23a7fe75 MM |
1321 | unsigned int low, high; |
1322 | int found; | |
afedecd3 MM |
1323 | |
1324 | uiout = current_uiout; | |
2e783024 | 1325 | ui_out_emit_tuple tuple_emitter (uiout, "func history"); |
23a7fe75 MM |
1326 | low = from; |
1327 | high = to; | |
afedecd3 | 1328 | |
0cb7c7b0 | 1329 | DEBUG ("call-history (0x%x): [%u; %u)", (int) flags, low, high); |
afedecd3 MM |
1330 | |
1331 | /* Check for wrap-arounds. */ | |
23a7fe75 | 1332 | if (low != from || high != to) |
afedecd3 MM |
1333 | error (_("Bad range.")); |
1334 | ||
0688d04e | 1335 | if (high < low) |
afedecd3 MM |
1336 | error (_("Bad range.")); |
1337 | ||
23a7fe75 | 1338 | btinfo = require_btrace (); |
afedecd3 | 1339 | |
23a7fe75 MM |
1340 | found = btrace_find_call_by_number (&begin, btinfo, low); |
1341 | if (found == 0) | |
1342 | error (_("Range out of bounds.")); | |
afedecd3 | 1343 | |
23a7fe75 MM |
1344 | found = btrace_find_call_by_number (&end, btinfo, high); |
1345 | if (found == 0) | |
0688d04e MM |
1346 | { |
1347 | /* Silently truncate the range. */ | |
1348 | btrace_call_end (&end, btinfo); | |
1349 | } | |
1350 | else | |
1351 | { | |
1352 | /* We want both begin and end to be inclusive. */ | |
1353 | btrace_call_next (&end, 1); | |
1354 | } | |
afedecd3 | 1355 | |
8710b709 | 1356 | btrace_call_history (uiout, btinfo, &begin, &end, flags); |
23a7fe75 | 1357 | btrace_set_call_history (btinfo, &begin, &end); |
afedecd3 MM |
1358 | } |
1359 | ||
f6ac5f3d | 1360 | /* The call_history_from method of target record-btrace. */ |
afedecd3 | 1361 | |
f6ac5f3d PA |
1362 | void |
1363 | record_btrace_target::call_history_from (ULONGEST from, int size, | |
1364 | record_print_flags flags) | |
afedecd3 MM |
1365 | { |
1366 | ULONGEST begin, end, context; | |
1367 | ||
1368 | context = abs (size); | |
0688d04e MM |
1369 | if (context == 0) |
1370 | error (_("Bad record function-call-history-size.")); | |
afedecd3 MM |
1371 | |
1372 | if (size < 0) | |
1373 | { | |
1374 | end = from; | |
1375 | ||
1376 | if (from < context) | |
1377 | begin = 0; | |
1378 | else | |
0688d04e | 1379 | begin = from - context + 1; |
afedecd3 MM |
1380 | } |
1381 | else | |
1382 | { | |
1383 | begin = from; | |
0688d04e | 1384 | end = from + context - 1; |
afedecd3 MM |
1385 | |
1386 | /* Check for wrap-around. */ | |
1387 | if (end < begin) | |
1388 | end = ULONGEST_MAX; | |
1389 | } | |
1390 | ||
f6ac5f3d | 1391 | call_history_range ( begin, end, flags); |
afedecd3 MM |
1392 | } |
1393 | ||
f6ac5f3d | 1394 | /* The record_method method of target record-btrace. */ |
b158a20f | 1395 | |
f6ac5f3d PA |
1396 | enum record_method |
1397 | record_btrace_target::record_method (ptid_t ptid) | |
b158a20f | 1398 | { |
5b6d1e4f | 1399 | process_stratum_target *proc_target = current_inferior ()->process_target (); |
9213a6d7 | 1400 | thread_info *const tp = proc_target->find_thread (ptid); |
b158a20f TW |
1401 | |
1402 | if (tp == NULL) | |
1403 | error (_("No thread.")); | |
1404 | ||
1405 | if (tp->btrace.target == NULL) | |
1406 | return RECORD_METHOD_NONE; | |
1407 | ||
1408 | return RECORD_METHOD_BTRACE; | |
1409 | } | |
1410 | ||
f6ac5f3d | 1411 | /* The record_is_replaying method of target record-btrace. */ |
07bbe694 | 1412 | |
57810aa7 | 1413 | bool |
f6ac5f3d | 1414 | record_btrace_target::record_is_replaying (ptid_t ptid) |
07bbe694 | 1415 | { |
5b6d1e4f PA |
1416 | process_stratum_target *proc_target = current_inferior ()->process_target (); |
1417 | for (thread_info *tp : all_non_exited_threads (proc_target, ptid)) | |
08036331 | 1418 | if (btrace_is_replaying (tp)) |
57810aa7 | 1419 | return true; |
07bbe694 | 1420 | |
57810aa7 | 1421 | return false; |
07bbe694 MM |
1422 | } |
1423 | ||
f6ac5f3d | 1424 | /* The record_will_replay method of target record-btrace. */ |
7ff27e9b | 1425 | |
57810aa7 | 1426 | bool |
f6ac5f3d | 1427 | record_btrace_target::record_will_replay (ptid_t ptid, int dir) |
7ff27e9b | 1428 | { |
f6ac5f3d | 1429 | return dir == EXEC_REVERSE || record_is_replaying (ptid); |
7ff27e9b MM |
1430 | } |
1431 | ||
f6ac5f3d | 1432 | /* The xfer_partial method of target record-btrace. */ |
633785ff | 1433 | |
f6ac5f3d PA |
1434 | enum target_xfer_status |
1435 | record_btrace_target::xfer_partial (enum target_object object, | |
1436 | const char *annex, gdb_byte *readbuf, | |
1437 | const gdb_byte *writebuf, ULONGEST offset, | |
1438 | ULONGEST len, ULONGEST *xfered_len) | |
633785ff | 1439 | { |
633785ff | 1440 | /* Filter out requests that don't make sense during replay. */ |
67b5c0c1 | 1441 | if (replay_memory_access == replay_memory_access_read_only |
aef92902 | 1442 | && !record_btrace_generating_corefile |
f6ac5f3d | 1443 | && record_is_replaying (inferior_ptid)) |
633785ff MM |
1444 | { |
1445 | switch (object) | |
1446 | { | |
1447 | case TARGET_OBJECT_MEMORY: | |
1448 | { | |
19cf757a | 1449 | const struct target_section *section; |
633785ff MM |
1450 | |
1451 | /* We do not allow writing memory in general. */ | |
1452 | if (writebuf != NULL) | |
9b409511 YQ |
1453 | { |
1454 | *xfered_len = len; | |
bc113b4e | 1455 | return TARGET_XFER_UNAVAILABLE; |
9b409511 | 1456 | } |
633785ff MM |
1457 | |
1458 | /* We allow reading readonly memory. */ | |
f6ac5f3d | 1459 | section = target_section_by_addr (this, offset); |
633785ff MM |
1460 | if (section != NULL) |
1461 | { | |
1462 | /* Check if the section we found is readonly. */ | |
fd361982 | 1463 | if ((bfd_section_flags (section->the_bfd_section) |
633785ff MM |
1464 | & SEC_READONLY) != 0) |
1465 | { | |
1466 | /* Truncate the request to fit into this section. */ | |
325fac50 | 1467 | len = std::min (len, section->endaddr - offset); |
633785ff MM |
1468 | break; |
1469 | } | |
1470 | } | |
1471 | ||
9b409511 | 1472 | *xfered_len = len; |
bc113b4e | 1473 | return TARGET_XFER_UNAVAILABLE; |
633785ff MM |
1474 | } |
1475 | } | |
1476 | } | |
1477 | ||
1478 | /* Forward the request. */ | |
b6a8c27b PA |
1479 | return this->beneath ()->xfer_partial (object, annex, readbuf, writebuf, |
1480 | offset, len, xfered_len); | |
633785ff MM |
1481 | } |
1482 | ||
f6ac5f3d | 1483 | /* The insert_breakpoint method of target record-btrace. */ |
633785ff | 1484 | |
f6ac5f3d PA |
1485 | int |
1486 | record_btrace_target::insert_breakpoint (struct gdbarch *gdbarch, | |
1487 | struct bp_target_info *bp_tgt) | |
633785ff | 1488 | { |
67b5c0c1 MM |
1489 | const char *old; |
1490 | int ret; | |
633785ff MM |
1491 | |
1492 | /* Inserting breakpoints requires accessing memory. Allow it for the | |
1493 | duration of this function. */ | |
67b5c0c1 MM |
1494 | old = replay_memory_access; |
1495 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1496 | |
1497 | ret = 0; | |
a70b8144 | 1498 | try |
492d29ea | 1499 | { |
b6a8c27b | 1500 | ret = this->beneath ()->insert_breakpoint (gdbarch, bp_tgt); |
492d29ea | 1501 | } |
230d2906 | 1502 | catch (const gdb_exception &except) |
492d29ea | 1503 | { |
6c63c96a | 1504 | replay_memory_access = old; |
eedc3f4f | 1505 | throw; |
492d29ea | 1506 | } |
6c63c96a | 1507 | replay_memory_access = old; |
633785ff MM |
1508 | |
1509 | return ret; | |
1510 | } | |
1511 | ||
f6ac5f3d | 1512 | /* The remove_breakpoint method of target record-btrace. */ |
633785ff | 1513 | |
f6ac5f3d PA |
1514 | int |
1515 | record_btrace_target::remove_breakpoint (struct gdbarch *gdbarch, | |
1516 | struct bp_target_info *bp_tgt, | |
1517 | enum remove_bp_reason reason) | |
633785ff | 1518 | { |
67b5c0c1 MM |
1519 | const char *old; |
1520 | int ret; | |
633785ff MM |
1521 | |
1522 | /* Removing breakpoints requires accessing memory. Allow it for the | |
1523 | duration of this function. */ | |
67b5c0c1 MM |
1524 | old = replay_memory_access; |
1525 | replay_memory_access = replay_memory_access_read_write; | |
633785ff MM |
1526 | |
1527 | ret = 0; | |
a70b8144 | 1528 | try |
492d29ea | 1529 | { |
b6a8c27b | 1530 | ret = this->beneath ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
492d29ea | 1531 | } |
230d2906 | 1532 | catch (const gdb_exception &except) |
492d29ea | 1533 | { |
6c63c96a | 1534 | replay_memory_access = old; |
eedc3f4f | 1535 | throw; |
492d29ea | 1536 | } |
6c63c96a | 1537 | replay_memory_access = old; |
633785ff MM |
1538 | |
1539 | return ret; | |
1540 | } | |
1541 | ||
f6ac5f3d | 1542 | /* The fetch_registers method of target record-btrace. */ |
1f3ef581 | 1543 | |
f6ac5f3d PA |
1544 | void |
1545 | record_btrace_target::fetch_registers (struct regcache *regcache, int regno) | |
1f3ef581 | 1546 | { |
1a476b6d MM |
1547 | btrace_insn_iterator *replay = nullptr; |
1548 | ||
1549 | /* Thread-db may ask for a thread's registers before GDB knows about the | |
1550 | thread. We forward the request to the target beneath in this | |
1551 | case. */ | |
2b214d3e SM |
1552 | thread_info *tp |
1553 | = current_inferior ()->process_target ()->find_thread (regcache->ptid ()); | |
1a476b6d MM |
1554 | if (tp != nullptr) |
1555 | replay = tp->btrace.replay; | |
1f3ef581 | 1556 | |
1a476b6d | 1557 | if (replay != nullptr && !record_btrace_generating_corefile) |
1f3ef581 MM |
1558 | { |
1559 | const struct btrace_insn *insn; | |
1560 | struct gdbarch *gdbarch; | |
1561 | int pcreg; | |
1562 | ||
ac7936df | 1563 | gdbarch = regcache->arch (); |
1f3ef581 MM |
1564 | pcreg = gdbarch_pc_regnum (gdbarch); |
1565 | if (pcreg < 0) | |
1566 | return; | |
1567 | ||
1568 | /* We can only provide the PC register. */ | |
1569 | if (regno >= 0 && regno != pcreg) | |
1570 | return; | |
1571 | ||
1572 | insn = btrace_insn_get (replay); | |
1573 | gdb_assert (insn != NULL); | |
1574 | ||
73e1c03f | 1575 | regcache->raw_supply (regno, &insn->pc); |
1f3ef581 MM |
1576 | } |
1577 | else | |
b6a8c27b | 1578 | this->beneath ()->fetch_registers (regcache, regno); |
1f3ef581 MM |
1579 | } |
1580 | ||
f6ac5f3d | 1581 | /* The store_registers method of target record-btrace. */ |
1f3ef581 | 1582 | |
f6ac5f3d PA |
1583 | void |
1584 | record_btrace_target::store_registers (struct regcache *regcache, int regno) | |
1f3ef581 | 1585 | { |
a52eab48 | 1586 | if (!record_btrace_generating_corefile |
222312d3 | 1587 | && record_is_replaying (regcache->ptid ())) |
4d10e986 | 1588 | error (_("Cannot write registers while replaying.")); |
1f3ef581 | 1589 | |
491144b5 | 1590 | gdb_assert (may_write_registers); |
1f3ef581 | 1591 | |
b6a8c27b | 1592 | this->beneath ()->store_registers (regcache, regno); |
1f3ef581 MM |
1593 | } |
1594 | ||
f6ac5f3d | 1595 | /* The prepare_to_store method of target record-btrace. */ |
1f3ef581 | 1596 | |
f6ac5f3d PA |
1597 | void |
1598 | record_btrace_target::prepare_to_store (struct regcache *regcache) | |
1f3ef581 | 1599 | { |
a52eab48 | 1600 | if (!record_btrace_generating_corefile |
222312d3 | 1601 | && record_is_replaying (regcache->ptid ())) |
1f3ef581 MM |
1602 | return; |
1603 | ||
b6a8c27b | 1604 | this->beneath ()->prepare_to_store (regcache); |
1f3ef581 MM |
1605 | } |
1606 | ||
0b722aec MM |
1607 | /* The branch trace frame cache. */ |
1608 | ||
1609 | struct btrace_frame_cache | |
1610 | { | |
1611 | /* The thread. */ | |
1612 | struct thread_info *tp; | |
1613 | ||
1614 | /* The frame info. */ | |
bd2b40ac | 1615 | frame_info *frame; |
0b722aec MM |
1616 | |
1617 | /* The branch trace function segment. */ | |
1618 | const struct btrace_function *bfun; | |
1619 | }; | |
1620 | ||
1621 | /* A struct btrace_frame_cache hash table indexed by NEXT. */ | |
1622 | ||
1623 | static htab_t bfcache; | |
1624 | ||
1625 | /* hash_f for htab_create_alloc of bfcache. */ | |
1626 | ||
1627 | static hashval_t | |
1628 | bfcache_hash (const void *arg) | |
1629 | { | |
19ba03f4 SM |
1630 | const struct btrace_frame_cache *cache |
1631 | = (const struct btrace_frame_cache *) arg; | |
0b722aec MM |
1632 | |
1633 | return htab_hash_pointer (cache->frame); | |
1634 | } | |
1635 | ||
1636 | /* eq_f for htab_create_alloc of bfcache. */ | |
1637 | ||
1638 | static int | |
1639 | bfcache_eq (const void *arg1, const void *arg2) | |
1640 | { | |
19ba03f4 SM |
1641 | const struct btrace_frame_cache *cache1 |
1642 | = (const struct btrace_frame_cache *) arg1; | |
1643 | const struct btrace_frame_cache *cache2 | |
1644 | = (const struct btrace_frame_cache *) arg2; | |
0b722aec MM |
1645 | |
1646 | return cache1->frame == cache2->frame; | |
1647 | } | |
1648 | ||
1649 | /* Create a new btrace frame cache. */ | |
1650 | ||
1651 | static struct btrace_frame_cache * | |
bd2b40ac | 1652 | bfcache_new (frame_info_ptr frame) |
0b722aec MM |
1653 | { |
1654 | struct btrace_frame_cache *cache; | |
1655 | void **slot; | |
1656 | ||
1657 | cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache); | |
bd2b40ac | 1658 | cache->frame = frame.get (); |
0b722aec MM |
1659 | |
1660 | slot = htab_find_slot (bfcache, cache, INSERT); | |
1661 | gdb_assert (*slot == NULL); | |
1662 | *slot = cache; | |
1663 | ||
1664 | return cache; | |
1665 | } | |
1666 | ||
1667 | /* Extract the branch trace function from a branch trace frame. */ | |
1668 | ||
1669 | static const struct btrace_function * | |
bd2b40ac | 1670 | btrace_get_frame_function (frame_info_ptr frame) |
0b722aec MM |
1671 | { |
1672 | const struct btrace_frame_cache *cache; | |
0b722aec MM |
1673 | struct btrace_frame_cache pattern; |
1674 | void **slot; | |
1675 | ||
bd2b40ac | 1676 | pattern.frame = frame.get (); |
0b722aec MM |
1677 | |
1678 | slot = htab_find_slot (bfcache, &pattern, NO_INSERT); | |
1679 | if (slot == NULL) | |
1680 | return NULL; | |
1681 | ||
19ba03f4 | 1682 | cache = (const struct btrace_frame_cache *) *slot; |
0b722aec MM |
1683 | return cache->bfun; |
1684 | } | |
1685 | ||
cecac1ab MM |
1686 | /* Implement stop_reason method for record_btrace_frame_unwind. */ |
1687 | ||
1688 | static enum unwind_stop_reason | |
bd2b40ac | 1689 | record_btrace_frame_unwind_stop_reason (frame_info_ptr this_frame, |
cecac1ab MM |
1690 | void **this_cache) |
1691 | { | |
0b722aec MM |
1692 | const struct btrace_frame_cache *cache; |
1693 | const struct btrace_function *bfun; | |
1694 | ||
19ba03f4 | 1695 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1696 | bfun = cache->bfun; |
1697 | gdb_assert (bfun != NULL); | |
1698 | ||
42bfe59e | 1699 | if (bfun->up == 0) |
0b722aec MM |
1700 | return UNWIND_UNAVAILABLE; |
1701 | ||
1702 | return UNWIND_NO_REASON; | |
cecac1ab MM |
1703 | } |
1704 | ||
1705 | /* Implement this_id method for record_btrace_frame_unwind. */ | |
1706 | ||
1707 | static void | |
bd2b40ac | 1708 | record_btrace_frame_this_id (frame_info_ptr this_frame, void **this_cache, |
cecac1ab MM |
1709 | struct frame_id *this_id) |
1710 | { | |
0b722aec MM |
1711 | const struct btrace_frame_cache *cache; |
1712 | const struct btrace_function *bfun; | |
4aeb0dfc | 1713 | struct btrace_call_iterator it; |
0b722aec MM |
1714 | CORE_ADDR code, special; |
1715 | ||
19ba03f4 | 1716 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1717 | |
1718 | bfun = cache->bfun; | |
1719 | gdb_assert (bfun != NULL); | |
1720 | ||
4aeb0dfc TW |
1721 | while (btrace_find_call_by_number (&it, &cache->tp->btrace, bfun->prev) != 0) |
1722 | bfun = btrace_call_get (&it); | |
0b722aec MM |
1723 | |
1724 | code = get_frame_func (this_frame); | |
1725 | special = bfun->number; | |
1726 | ||
1727 | *this_id = frame_id_build_unavailable_stack_special (code, special); | |
1728 | ||
1729 | DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)", | |
1730 | btrace_get_bfun_name (cache->bfun), | |
1731 | core_addr_to_string_nz (this_id->code_addr), | |
1732 | core_addr_to_string_nz (this_id->special_addr)); | |
cecac1ab MM |
1733 | } |
1734 | ||
1735 | /* Implement prev_register method for record_btrace_frame_unwind. */ | |
1736 | ||
1737 | static struct value * | |
bd2b40ac | 1738 | record_btrace_frame_prev_register (frame_info_ptr this_frame, |
cecac1ab MM |
1739 | void **this_cache, |
1740 | int regnum) | |
1741 | { | |
0b722aec MM |
1742 | const struct btrace_frame_cache *cache; |
1743 | const struct btrace_function *bfun, *caller; | |
42bfe59e | 1744 | struct btrace_call_iterator it; |
0b722aec MM |
1745 | struct gdbarch *gdbarch; |
1746 | CORE_ADDR pc; | |
1747 | int pcreg; | |
1748 | ||
1749 | gdbarch = get_frame_arch (this_frame); | |
1750 | pcreg = gdbarch_pc_regnum (gdbarch); | |
1751 | if (pcreg < 0 || regnum != pcreg) | |
1752 | throw_error (NOT_AVAILABLE_ERROR, | |
1753 | _("Registers are not available in btrace record history")); | |
1754 | ||
19ba03f4 | 1755 | cache = (const struct btrace_frame_cache *) *this_cache; |
0b722aec MM |
1756 | bfun = cache->bfun; |
1757 | gdb_assert (bfun != NULL); | |
1758 | ||
42bfe59e | 1759 | if (btrace_find_call_by_number (&it, &cache->tp->btrace, bfun->up) == 0) |
0b722aec MM |
1760 | throw_error (NOT_AVAILABLE_ERROR, |
1761 | _("No caller in btrace record history")); | |
1762 | ||
42bfe59e TW |
1763 | caller = btrace_call_get (&it); |
1764 | ||
0b722aec | 1765 | if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0) |
0860c437 | 1766 | pc = caller->insn.front ().pc; |
0b722aec MM |
1767 | else |
1768 | { | |
0860c437 | 1769 | pc = caller->insn.back ().pc; |
0b722aec MM |
1770 | pc += gdb_insn_length (gdbarch, pc); |
1771 | } | |
1772 | ||
1773 | DEBUG ("[frame] unwound PC in %s on level %d: %s", | |
1774 | btrace_get_bfun_name (bfun), bfun->level, | |
1775 | core_addr_to_string_nz (pc)); | |
1776 | ||
1777 | return frame_unwind_got_address (this_frame, regnum, pc); | |
cecac1ab MM |
1778 | } |
1779 | ||
1780 | /* Implement sniffer method for record_btrace_frame_unwind. */ | |
1781 | ||
1782 | static int | |
1783 | record_btrace_frame_sniffer (const struct frame_unwind *self, | |
bd2b40ac | 1784 | frame_info_ptr this_frame, |
cecac1ab MM |
1785 | void **this_cache) |
1786 | { | |
0b722aec MM |
1787 | const struct btrace_function *bfun; |
1788 | struct btrace_frame_cache *cache; | |
cecac1ab | 1789 | struct thread_info *tp; |
bd2b40ac | 1790 | frame_info_ptr next; |
cecac1ab MM |
1791 | |
1792 | /* THIS_FRAME does not contain a reference to its thread. */ | |
00431a78 | 1793 | tp = inferior_thread (); |
cecac1ab | 1794 | |
0b722aec MM |
1795 | bfun = NULL; |
1796 | next = get_next_frame (this_frame); | |
1797 | if (next == NULL) | |
1798 | { | |
1799 | const struct btrace_insn_iterator *replay; | |
1800 | ||
1801 | replay = tp->btrace.replay; | |
1802 | if (replay != NULL) | |
08c3f6d2 | 1803 | bfun = &replay->btinfo->functions[replay->call_index]; |
0b722aec MM |
1804 | } |
1805 | else | |
1806 | { | |
1807 | const struct btrace_function *callee; | |
42bfe59e | 1808 | struct btrace_call_iterator it; |
0b722aec MM |
1809 | |
1810 | callee = btrace_get_frame_function (next); | |
42bfe59e TW |
1811 | if (callee == NULL || (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) != 0) |
1812 | return 0; | |
1813 | ||
1814 | if (btrace_find_call_by_number (&it, &tp->btrace, callee->up) == 0) | |
1815 | return 0; | |
1816 | ||
1817 | bfun = btrace_call_get (&it); | |
0b722aec MM |
1818 | } |
1819 | ||
1820 | if (bfun == NULL) | |
1821 | return 0; | |
1822 | ||
1823 | DEBUG ("[frame] sniffed frame for %s on level %d", | |
1824 | btrace_get_bfun_name (bfun), bfun->level); | |
1825 | ||
1826 | /* This is our frame. Initialize the frame cache. */ | |
1827 | cache = bfcache_new (this_frame); | |
1828 | cache->tp = tp; | |
1829 | cache->bfun = bfun; | |
1830 | ||
1831 | *this_cache = cache; | |
1832 | return 1; | |
1833 | } | |
1834 | ||
1835 | /* Implement sniffer method for record_btrace_tailcall_frame_unwind. */ | |
1836 | ||
1837 | static int | |
1838 | record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self, | |
bd2b40ac | 1839 | frame_info_ptr this_frame, |
0b722aec MM |
1840 | void **this_cache) |
1841 | { | |
1842 | const struct btrace_function *bfun, *callee; | |
1843 | struct btrace_frame_cache *cache; | |
42bfe59e | 1844 | struct btrace_call_iterator it; |
bd2b40ac | 1845 | frame_info_ptr next; |
42bfe59e | 1846 | struct thread_info *tinfo; |
0b722aec MM |
1847 | |
1848 | next = get_next_frame (this_frame); | |
1849 | if (next == NULL) | |
1850 | return 0; | |
1851 | ||
1852 | callee = btrace_get_frame_function (next); | |
1853 | if (callee == NULL) | |
1854 | return 0; | |
1855 | ||
1856 | if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0) | |
1857 | return 0; | |
1858 | ||
00431a78 | 1859 | tinfo = inferior_thread (); |
42bfe59e | 1860 | if (btrace_find_call_by_number (&it, &tinfo->btrace, callee->up) == 0) |
0b722aec MM |
1861 | return 0; |
1862 | ||
42bfe59e TW |
1863 | bfun = btrace_call_get (&it); |
1864 | ||
0b722aec MM |
1865 | DEBUG ("[frame] sniffed tailcall frame for %s on level %d", |
1866 | btrace_get_bfun_name (bfun), bfun->level); | |
1867 | ||
1868 | /* This is our frame. Initialize the frame cache. */ | |
1869 | cache = bfcache_new (this_frame); | |
42bfe59e | 1870 | cache->tp = tinfo; |
0b722aec MM |
1871 | cache->bfun = bfun; |
1872 | ||
1873 | *this_cache = cache; | |
1874 | return 1; | |
1875 | } | |
1876 | ||
1877 | static void | |
bd2b40ac | 1878 | record_btrace_frame_dealloc_cache (frame_info *self, void *this_cache) |
0b722aec MM |
1879 | { |
1880 | struct btrace_frame_cache *cache; | |
1881 | void **slot; | |
1882 | ||
19ba03f4 | 1883 | cache = (struct btrace_frame_cache *) this_cache; |
0b722aec MM |
1884 | |
1885 | slot = htab_find_slot (bfcache, cache, NO_INSERT); | |
1886 | gdb_assert (slot != NULL); | |
1887 | ||
1888 | htab_remove_elt (bfcache, cache); | |
cecac1ab MM |
1889 | } |
1890 | ||
1891 | /* btrace recording does not store previous memory content, neither the stack | |
30baf67b | 1892 | frames content. Any unwinding would return erroneous results as the stack |
cecac1ab MM |
1893 | contents no longer matches the changed PC value restored from history. |
1894 | Therefore this unwinder reports any possibly unwound registers as | |
1895 | <unavailable>. */ | |
1896 | ||
0b722aec | 1897 | const struct frame_unwind record_btrace_frame_unwind = |
cecac1ab | 1898 | { |
a154d838 | 1899 | "record-btrace", |
cecac1ab MM |
1900 | NORMAL_FRAME, |
1901 | record_btrace_frame_unwind_stop_reason, | |
1902 | record_btrace_frame_this_id, | |
1903 | record_btrace_frame_prev_register, | |
1904 | NULL, | |
0b722aec MM |
1905 | record_btrace_frame_sniffer, |
1906 | record_btrace_frame_dealloc_cache | |
1907 | }; | |
1908 | ||
1909 | const struct frame_unwind record_btrace_tailcall_frame_unwind = | |
1910 | { | |
a154d838 | 1911 | "record-btrace tailcall", |
0b722aec MM |
1912 | TAILCALL_FRAME, |
1913 | record_btrace_frame_unwind_stop_reason, | |
1914 | record_btrace_frame_this_id, | |
1915 | record_btrace_frame_prev_register, | |
1916 | NULL, | |
1917 | record_btrace_tailcall_frame_sniffer, | |
1918 | record_btrace_frame_dealloc_cache | |
cecac1ab | 1919 | }; |
b2f4cfde | 1920 | |
f6ac5f3d | 1921 | /* Implement the get_unwinder method. */ |
ac01945b | 1922 | |
f6ac5f3d PA |
1923 | const struct frame_unwind * |
1924 | record_btrace_target::get_unwinder () | |
ac01945b TT |
1925 | { |
1926 | return &record_btrace_frame_unwind; | |
1927 | } | |
1928 | ||
f6ac5f3d | 1929 | /* Implement the get_tailcall_unwinder method. */ |
ac01945b | 1930 | |
f6ac5f3d PA |
1931 | const struct frame_unwind * |
1932 | record_btrace_target::get_tailcall_unwinder () | |
ac01945b TT |
1933 | { |
1934 | return &record_btrace_tailcall_frame_unwind; | |
1935 | } | |
1936 | ||
987e68b1 MM |
1937 | /* Return a human-readable string for FLAG. */ |
1938 | ||
1939 | static const char * | |
04902b09 | 1940 | btrace_thread_flag_to_str (btrace_thread_flags flag) |
987e68b1 MM |
1941 | { |
1942 | switch (flag) | |
1943 | { | |
1944 | case BTHR_STEP: | |
1945 | return "step"; | |
1946 | ||
1947 | case BTHR_RSTEP: | |
1948 | return "reverse-step"; | |
1949 | ||
1950 | case BTHR_CONT: | |
1951 | return "cont"; | |
1952 | ||
1953 | case BTHR_RCONT: | |
1954 | return "reverse-cont"; | |
1955 | ||
1956 | case BTHR_STOP: | |
1957 | return "stop"; | |
1958 | } | |
1959 | ||
1960 | return "<invalid>"; | |
1961 | } | |
1962 | ||
52834460 MM |
1963 | /* Indicate that TP should be resumed according to FLAG. */ |
1964 | ||
1965 | static void | |
1966 | record_btrace_resume_thread (struct thread_info *tp, | |
1967 | enum btrace_thread_flag flag) | |
1968 | { | |
1969 | struct btrace_thread_info *btinfo; | |
1970 | ||
43792cf0 | 1971 | DEBUG ("resuming thread %s (%s): %x (%s)", print_thread_id (tp), |
e53c95d4 | 1972 | tp->ptid.to_string ().c_str (), flag, |
a068643d | 1973 | btrace_thread_flag_to_str (flag)); |
52834460 MM |
1974 | |
1975 | btinfo = &tp->btrace; | |
1976 | ||
52834460 | 1977 | /* Fetch the latest branch trace. */ |
4a4495d6 | 1978 | btrace_fetch (tp, record_btrace_get_cpu ()); |
52834460 | 1979 | |
0ca912df MM |
1980 | /* A resume request overwrites a preceding resume or stop request. */ |
1981 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 MM |
1982 | btinfo->flags |= flag; |
1983 | } | |
1984 | ||
ec71cc2f MM |
1985 | /* Get the current frame for TP. */ |
1986 | ||
79b8d3b0 TT |
1987 | static struct frame_id |
1988 | get_thread_current_frame_id (struct thread_info *tp) | |
ec71cc2f | 1989 | { |
00431a78 PA |
1990 | /* Set current thread, which is implicitly used by |
1991 | get_current_frame. */ | |
1992 | scoped_restore_current_thread restore_thread; | |
1993 | ||
1994 | switch_to_thread (tp); | |
ec71cc2f | 1995 | |
5b6d1e4f PA |
1996 | process_stratum_target *proc_target = tp->inf->process_target (); |
1997 | ||
ec71cc2f MM |
1998 | /* Clear the executing flag to allow changes to the current frame. |
1999 | We are not actually running, yet. We just started a reverse execution | |
2000 | command or a record goto command. | |
2001 | For the latter, EXECUTING is false and this has no effect. | |
f6ac5f3d | 2002 | For the former, EXECUTING is true and we're in wait, about to |
ec71cc2f | 2003 | move the thread. Since we need to recompute the stack, we temporarily |
85102364 | 2004 | set EXECUTING to false. */ |
391c90ee | 2005 | bool executing = tp->executing (); |
5b6d1e4f | 2006 | set_executing (proc_target, inferior_ptid, false); |
391c90ee | 2007 | SCOPE_EXIT |
ec71cc2f | 2008 | { |
5b6d1e4f | 2009 | set_executing (proc_target, inferior_ptid, executing); |
391c90ee AB |
2010 | }; |
2011 | return get_frame_id (get_current_frame ()); | |
ec71cc2f MM |
2012 | } |
2013 | ||
52834460 MM |
2014 | /* Start replaying a thread. */ |
2015 | ||
2016 | static struct btrace_insn_iterator * | |
2017 | record_btrace_start_replaying (struct thread_info *tp) | |
2018 | { | |
52834460 MM |
2019 | struct btrace_insn_iterator *replay; |
2020 | struct btrace_thread_info *btinfo; | |
52834460 MM |
2021 | |
2022 | btinfo = &tp->btrace; | |
2023 | replay = NULL; | |
2024 | ||
2025 | /* We can't start replaying without trace. */ | |
b54b03bd | 2026 | if (btinfo->functions.empty ()) |
49a73ab9 | 2027 | error (_("No trace.")); |
52834460 | 2028 | |
52834460 MM |
2029 | /* GDB stores the current frame_id when stepping in order to detects steps |
2030 | into subroutines. | |
2031 | Since frames are computed differently when we're replaying, we need to | |
2032 | recompute those stored frames and fix them up so we can still detect | |
2033 | subroutines after we started replaying. */ | |
a70b8144 | 2034 | try |
52834460 | 2035 | { |
52834460 MM |
2036 | struct frame_id frame_id; |
2037 | int upd_step_frame_id, upd_step_stack_frame_id; | |
2038 | ||
2039 | /* The current frame without replaying - computed via normal unwind. */ | |
79b8d3b0 | 2040 | frame_id = get_thread_current_frame_id (tp); |
52834460 MM |
2041 | |
2042 | /* Check if we need to update any stepping-related frame id's. */ | |
a0cbd650 TT |
2043 | upd_step_frame_id = (frame_id == tp->control.step_frame_id); |
2044 | upd_step_stack_frame_id = (frame_id == tp->control.step_stack_frame_id); | |
52834460 MM |
2045 | |
2046 | /* We start replaying at the end of the branch trace. This corresponds | |
2047 | to the current instruction. */ | |
8d749320 | 2048 | replay = XNEW (struct btrace_insn_iterator); |
52834460 MM |
2049 | btrace_insn_end (replay, btinfo); |
2050 | ||
31fd9caa MM |
2051 | /* Skip gaps at the end of the trace. */ |
2052 | while (btrace_insn_get (replay) == NULL) | |
2053 | { | |
2054 | unsigned int steps; | |
2055 | ||
2056 | steps = btrace_insn_prev (replay, 1); | |
2057 | if (steps == 0) | |
2058 | error (_("No trace.")); | |
2059 | } | |
2060 | ||
52834460 MM |
2061 | /* We're not replaying, yet. */ |
2062 | gdb_assert (btinfo->replay == NULL); | |
2063 | btinfo->replay = replay; | |
2064 | ||
2065 | /* Make sure we're not using any stale registers. */ | |
00431a78 | 2066 | registers_changed_thread (tp); |
52834460 MM |
2067 | |
2068 | /* The current frame with replaying - computed via btrace unwind. */ | |
79b8d3b0 | 2069 | frame_id = get_thread_current_frame_id (tp); |
52834460 MM |
2070 | |
2071 | /* Replace stepping related frames where necessary. */ | |
2072 | if (upd_step_frame_id) | |
2073 | tp->control.step_frame_id = frame_id; | |
2074 | if (upd_step_stack_frame_id) | |
2075 | tp->control.step_stack_frame_id = frame_id; | |
2076 | } | |
230d2906 | 2077 | catch (const gdb_exception &except) |
52834460 MM |
2078 | { |
2079 | xfree (btinfo->replay); | |
2080 | btinfo->replay = NULL; | |
2081 | ||
00431a78 | 2082 | registers_changed_thread (tp); |
52834460 | 2083 | |
eedc3f4f | 2084 | throw; |
52834460 MM |
2085 | } |
2086 | ||
2087 | return replay; | |
2088 | } | |
2089 | ||
2090 | /* Stop replaying a thread. */ | |
2091 | ||
2092 | static void | |
2093 | record_btrace_stop_replaying (struct thread_info *tp) | |
2094 | { | |
2095 | struct btrace_thread_info *btinfo; | |
2096 | ||
2097 | btinfo = &tp->btrace; | |
2098 | ||
2099 | xfree (btinfo->replay); | |
2100 | btinfo->replay = NULL; | |
2101 | ||
2102 | /* Make sure we're not leaving any stale registers. */ | |
00431a78 | 2103 | registers_changed_thread (tp); |
52834460 MM |
2104 | } |
2105 | ||
e3cfc1c7 MM |
2106 | /* Stop replaying TP if it is at the end of its execution history. */ |
2107 | ||
2108 | static void | |
2109 | record_btrace_stop_replaying_at_end (struct thread_info *tp) | |
2110 | { | |
2111 | struct btrace_insn_iterator *replay, end; | |
2112 | struct btrace_thread_info *btinfo; | |
2113 | ||
2114 | btinfo = &tp->btrace; | |
2115 | replay = btinfo->replay; | |
2116 | ||
2117 | if (replay == NULL) | |
2118 | return; | |
2119 | ||
2120 | btrace_insn_end (&end, btinfo); | |
2121 | ||
2122 | if (btrace_insn_cmp (replay, &end) == 0) | |
2123 | record_btrace_stop_replaying (tp); | |
2124 | } | |
2125 | ||
f6ac5f3d | 2126 | /* The resume method of target record-btrace. */ |
b2f4cfde | 2127 | |
f6ac5f3d PA |
2128 | void |
2129 | record_btrace_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
b2f4cfde | 2130 | { |
d2939ba2 | 2131 | enum btrace_thread_flag flag, cflag; |
52834460 | 2132 | |
e53c95d4 | 2133 | DEBUG ("resume %s: %s%s", ptid.to_string ().c_str (), |
f6ac5f3d | 2134 | ::execution_direction == EXEC_REVERSE ? "reverse-" : "", |
987e68b1 | 2135 | step ? "step" : "cont"); |
52834460 | 2136 | |
0ca912df MM |
2137 | /* Store the execution direction of the last resume. |
2138 | ||
f6ac5f3d | 2139 | If there is more than one resume call, we have to rely on infrun |
0ca912df | 2140 | to not change the execution direction in-between. */ |
f6ac5f3d | 2141 | record_btrace_resume_exec_dir = ::execution_direction; |
70ad5bff | 2142 | |
0ca912df | 2143 | /* As long as we're not replaying, just forward the request. |
52834460 | 2144 | |
0ca912df MM |
2145 | For non-stop targets this means that no thread is replaying. In order to |
2146 | make progress, we may need to explicitly move replaying threads to the end | |
2147 | of their execution history. */ | |
f6ac5f3d PA |
2148 | if ((::execution_direction != EXEC_REVERSE) |
2149 | && !record_is_replaying (minus_one_ptid)) | |
b2f4cfde | 2150 | { |
b6a8c27b | 2151 | this->beneath ()->resume (ptid, step, signal); |
04c4fe8c | 2152 | return; |
b2f4cfde MM |
2153 | } |
2154 | ||
52834460 | 2155 | /* Compute the btrace thread flag for the requested move. */ |
f6ac5f3d | 2156 | if (::execution_direction == EXEC_REVERSE) |
d2939ba2 MM |
2157 | { |
2158 | flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP; | |
2159 | cflag = BTHR_RCONT; | |
2160 | } | |
52834460 | 2161 | else |
d2939ba2 MM |
2162 | { |
2163 | flag = step == 0 ? BTHR_CONT : BTHR_STEP; | |
2164 | cflag = BTHR_CONT; | |
2165 | } | |
52834460 | 2166 | |
52834460 | 2167 | /* We just indicate the resume intent here. The actual stepping happens in |
d2939ba2 MM |
2168 | record_btrace_wait below. |
2169 | ||
2170 | For all-stop targets, we only step INFERIOR_PTID and continue others. */ | |
5b6d1e4f PA |
2171 | |
2172 | process_stratum_target *proc_target = current_inferior ()->process_target (); | |
2173 | ||
d2939ba2 MM |
2174 | if (!target_is_non_stop_p ()) |
2175 | { | |
26a57c92 | 2176 | gdb_assert (inferior_ptid.matches (ptid)); |
d2939ba2 | 2177 | |
5b6d1e4f | 2178 | for (thread_info *tp : all_non_exited_threads (proc_target, ptid)) |
08036331 PA |
2179 | { |
2180 | if (tp->ptid.matches (inferior_ptid)) | |
2181 | record_btrace_resume_thread (tp, flag); | |
2182 | else | |
2183 | record_btrace_resume_thread (tp, cflag); | |
2184 | } | |
d2939ba2 MM |
2185 | } |
2186 | else | |
2187 | { | |
5b6d1e4f | 2188 | for (thread_info *tp : all_non_exited_threads (proc_target, ptid)) |
08036331 | 2189 | record_btrace_resume_thread (tp, flag); |
d2939ba2 | 2190 | } |
70ad5bff MM |
2191 | |
2192 | /* Async support. */ | |
2193 | if (target_can_async_p ()) | |
2194 | { | |
4a570176 | 2195 | target_async (true); |
70ad5bff MM |
2196 | mark_async_event_handler (record_btrace_async_inferior_event_handler); |
2197 | } | |
52834460 MM |
2198 | } |
2199 | ||
987e68b1 MM |
2200 | /* Cancel resuming TP. */ |
2201 | ||
2202 | static void | |
2203 | record_btrace_cancel_resume (struct thread_info *tp) | |
2204 | { | |
04902b09 | 2205 | btrace_thread_flags flags; |
987e68b1 MM |
2206 | |
2207 | flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP); | |
2208 | if (flags == 0) | |
2209 | return; | |
2210 | ||
43792cf0 PA |
2211 | DEBUG ("cancel resume thread %s (%s): %x (%s)", |
2212 | print_thread_id (tp), | |
e53c95d4 | 2213 | tp->ptid.to_string ().c_str (), flags.raw (), |
987e68b1 MM |
2214 | btrace_thread_flag_to_str (flags)); |
2215 | ||
2216 | tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP); | |
e3cfc1c7 | 2217 | record_btrace_stop_replaying_at_end (tp); |
52834460 MM |
2218 | } |
2219 | ||
2220 | /* Return a target_waitstatus indicating that we ran out of history. */ | |
2221 | ||
2222 | static struct target_waitstatus | |
2223 | btrace_step_no_history (void) | |
2224 | { | |
2225 | struct target_waitstatus status; | |
2226 | ||
183be222 | 2227 | status.set_no_history (); |
52834460 MM |
2228 | |
2229 | return status; | |
2230 | } | |
2231 | ||
2232 | /* Return a target_waitstatus indicating that a step finished. */ | |
2233 | ||
2234 | static struct target_waitstatus | |
2235 | btrace_step_stopped (void) | |
2236 | { | |
2237 | struct target_waitstatus status; | |
2238 | ||
183be222 | 2239 | status.set_stopped (GDB_SIGNAL_TRAP); |
52834460 MM |
2240 | |
2241 | return status; | |
2242 | } | |
2243 | ||
6e4879f0 MM |
2244 | /* Return a target_waitstatus indicating that a thread was stopped as |
2245 | requested. */ | |
2246 | ||
2247 | static struct target_waitstatus | |
2248 | btrace_step_stopped_on_request (void) | |
2249 | { | |
2250 | struct target_waitstatus status; | |
2251 | ||
183be222 | 2252 | status.set_stopped (GDB_SIGNAL_0); |
6e4879f0 MM |
2253 | |
2254 | return status; | |
2255 | } | |
2256 | ||
d825d248 MM |
2257 | /* Return a target_waitstatus indicating a spurious stop. */ |
2258 | ||
2259 | static struct target_waitstatus | |
2260 | btrace_step_spurious (void) | |
2261 | { | |
2262 | struct target_waitstatus status; | |
2263 | ||
183be222 | 2264 | status.set_spurious (); |
d825d248 MM |
2265 | |
2266 | return status; | |
2267 | } | |
2268 | ||
e3cfc1c7 MM |
2269 | /* Return a target_waitstatus indicating that the thread was not resumed. */ |
2270 | ||
2271 | static struct target_waitstatus | |
2272 | btrace_step_no_resumed (void) | |
2273 | { | |
2274 | struct target_waitstatus status; | |
2275 | ||
183be222 | 2276 | status.set_no_resumed (); |
e3cfc1c7 MM |
2277 | |
2278 | return status; | |
2279 | } | |
2280 | ||
2281 | /* Return a target_waitstatus indicating that we should wait again. */ | |
2282 | ||
2283 | static struct target_waitstatus | |
2284 | btrace_step_again (void) | |
2285 | { | |
2286 | struct target_waitstatus status; | |
2287 | ||
183be222 | 2288 | status.set_ignore (); |
e3cfc1c7 MM |
2289 | |
2290 | return status; | |
2291 | } | |
2292 | ||
52834460 MM |
2293 | /* Clear the record histories. */ |
2294 | ||
2295 | static void | |
2296 | record_btrace_clear_histories (struct btrace_thread_info *btinfo) | |
2297 | { | |
2298 | xfree (btinfo->insn_history); | |
2299 | xfree (btinfo->call_history); | |
2300 | ||
2301 | btinfo->insn_history = NULL; | |
2302 | btinfo->call_history = NULL; | |
2303 | } | |
2304 | ||
3c615f99 MM |
2305 | /* Check whether TP's current replay position is at a breakpoint. */ |
2306 | ||
2307 | static int | |
2308 | record_btrace_replay_at_breakpoint (struct thread_info *tp) | |
2309 | { | |
2310 | struct btrace_insn_iterator *replay; | |
2311 | struct btrace_thread_info *btinfo; | |
2312 | const struct btrace_insn *insn; | |
3c615f99 MM |
2313 | |
2314 | btinfo = &tp->btrace; | |
2315 | replay = btinfo->replay; | |
2316 | ||
2317 | if (replay == NULL) | |
2318 | return 0; | |
2319 | ||
2320 | insn = btrace_insn_get (replay); | |
2321 | if (insn == NULL) | |
2322 | return 0; | |
2323 | ||
00431a78 | 2324 | return record_check_stopped_by_breakpoint (tp->inf->aspace, insn->pc, |
3c615f99 MM |
2325 | &btinfo->stop_reason); |
2326 | } | |
2327 | ||
d825d248 | 2328 | /* Step one instruction in forward direction. */ |
52834460 MM |
2329 | |
2330 | static struct target_waitstatus | |
d825d248 | 2331 | record_btrace_single_step_forward (struct thread_info *tp) |
52834460 | 2332 | { |
b61ce85c | 2333 | struct btrace_insn_iterator *replay, end, start; |
52834460 | 2334 | struct btrace_thread_info *btinfo; |
52834460 | 2335 | |
d825d248 MM |
2336 | btinfo = &tp->btrace; |
2337 | replay = btinfo->replay; | |
2338 | ||
2339 | /* We're done if we're not replaying. */ | |
2340 | if (replay == NULL) | |
2341 | return btrace_step_no_history (); | |
2342 | ||
011c71b6 MM |
2343 | /* Check if we're stepping a breakpoint. */ |
2344 | if (record_btrace_replay_at_breakpoint (tp)) | |
2345 | return btrace_step_stopped (); | |
2346 | ||
b61ce85c MM |
2347 | /* Skip gaps during replay. If we end up at a gap (at the end of the trace), |
2348 | jump back to the instruction at which we started. */ | |
2349 | start = *replay; | |
d825d248 MM |
2350 | do |
2351 | { | |
2352 | unsigned int steps; | |
2353 | ||
e3cfc1c7 MM |
2354 | /* We will bail out here if we continue stepping after reaching the end |
2355 | of the execution history. */ | |
d825d248 MM |
2356 | steps = btrace_insn_next (replay, 1); |
2357 | if (steps == 0) | |
b61ce85c MM |
2358 | { |
2359 | *replay = start; | |
2360 | return btrace_step_no_history (); | |
2361 | } | |
d825d248 MM |
2362 | } |
2363 | while (btrace_insn_get (replay) == NULL); | |
2364 | ||
2365 | /* Determine the end of the instruction trace. */ | |
2366 | btrace_insn_end (&end, btinfo); | |
2367 | ||
e3cfc1c7 MM |
2368 | /* The execution trace contains (and ends with) the current instruction. |
2369 | This instruction has not been executed, yet, so the trace really ends | |
2370 | one instruction earlier. */ | |
d825d248 | 2371 | if (btrace_insn_cmp (replay, &end) == 0) |
e3cfc1c7 | 2372 | return btrace_step_no_history (); |
d825d248 MM |
2373 | |
2374 | return btrace_step_spurious (); | |
2375 | } | |
2376 | ||
2377 | /* Step one instruction in backward direction. */ | |
2378 | ||
2379 | static struct target_waitstatus | |
2380 | record_btrace_single_step_backward (struct thread_info *tp) | |
2381 | { | |
b61ce85c | 2382 | struct btrace_insn_iterator *replay, start; |
d825d248 | 2383 | struct btrace_thread_info *btinfo; |
e59fa00f | 2384 | |
52834460 MM |
2385 | btinfo = &tp->btrace; |
2386 | replay = btinfo->replay; | |
2387 | ||
d825d248 MM |
2388 | /* Start replaying if we're not already doing so. */ |
2389 | if (replay == NULL) | |
2390 | replay = record_btrace_start_replaying (tp); | |
2391 | ||
2392 | /* If we can't step any further, we reached the end of the history. | |
b61ce85c MM |
2393 | Skip gaps during replay. If we end up at a gap (at the beginning of |
2394 | the trace), jump back to the instruction at which we started. */ | |
2395 | start = *replay; | |
d825d248 MM |
2396 | do |
2397 | { | |
2398 | unsigned int steps; | |
2399 | ||
2400 | steps = btrace_insn_prev (replay, 1); | |
2401 | if (steps == 0) | |
b61ce85c MM |
2402 | { |
2403 | *replay = start; | |
2404 | return btrace_step_no_history (); | |
2405 | } | |
d825d248 MM |
2406 | } |
2407 | while (btrace_insn_get (replay) == NULL); | |
2408 | ||
011c71b6 MM |
2409 | /* Check if we're stepping a breakpoint. |
2410 | ||
2411 | For reverse-stepping, this check is after the step. There is logic in | |
2412 | infrun.c that handles reverse-stepping separately. See, for example, | |
2413 | proceed and adjust_pc_after_break. | |
2414 | ||
2415 | This code assumes that for reverse-stepping, PC points to the last | |
2416 | de-executed instruction, whereas for forward-stepping PC points to the | |
2417 | next to-be-executed instruction. */ | |
2418 | if (record_btrace_replay_at_breakpoint (tp)) | |
2419 | return btrace_step_stopped (); | |
2420 | ||
d825d248 MM |
2421 | return btrace_step_spurious (); |
2422 | } | |
2423 | ||
2424 | /* Step a single thread. */ | |
2425 | ||
2426 | static struct target_waitstatus | |
2427 | record_btrace_step_thread (struct thread_info *tp) | |
2428 | { | |
2429 | struct btrace_thread_info *btinfo; | |
2430 | struct target_waitstatus status; | |
04902b09 | 2431 | btrace_thread_flags flags; |
d825d248 MM |
2432 | |
2433 | btinfo = &tp->btrace; | |
2434 | ||
6e4879f0 MM |
2435 | flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP); |
2436 | btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP); | |
52834460 | 2437 | |
43792cf0 | 2438 | DEBUG ("stepping thread %s (%s): %x (%s)", print_thread_id (tp), |
e53c95d4 | 2439 | tp->ptid.to_string ().c_str (), flags.raw (), |
987e68b1 | 2440 | btrace_thread_flag_to_str (flags)); |
52834460 | 2441 | |
6e4879f0 MM |
2442 | /* We can't step without an execution history. */ |
2443 | if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp)) | |
2444 | return btrace_step_no_history (); | |
2445 | ||
52834460 MM |
2446 | switch (flags) |
2447 | { | |
2448 | default: | |
f34652de | 2449 | internal_error (_("invalid stepping type.")); |
52834460 | 2450 | |
6e4879f0 MM |
2451 | case BTHR_STOP: |
2452 | return btrace_step_stopped_on_request (); | |
2453 | ||
52834460 | 2454 | case BTHR_STEP: |
d825d248 | 2455 | status = record_btrace_single_step_forward (tp); |
183be222 | 2456 | if (status.kind () != TARGET_WAITKIND_SPURIOUS) |
e3cfc1c7 | 2457 | break; |
52834460 MM |
2458 | |
2459 | return btrace_step_stopped (); | |
2460 | ||
2461 | case BTHR_RSTEP: | |
d825d248 | 2462 | status = record_btrace_single_step_backward (tp); |
183be222 | 2463 | if (status.kind () != TARGET_WAITKIND_SPURIOUS) |
e3cfc1c7 | 2464 | break; |
52834460 MM |
2465 | |
2466 | return btrace_step_stopped (); | |
2467 | ||
2468 | case BTHR_CONT: | |
e3cfc1c7 | 2469 | status = record_btrace_single_step_forward (tp); |
183be222 | 2470 | if (status.kind () != TARGET_WAITKIND_SPURIOUS) |
e3cfc1c7 | 2471 | break; |
52834460 | 2472 | |
e3cfc1c7 MM |
2473 | btinfo->flags |= flags; |
2474 | return btrace_step_again (); | |
52834460 MM |
2475 | |
2476 | case BTHR_RCONT: | |
e3cfc1c7 | 2477 | status = record_btrace_single_step_backward (tp); |
183be222 | 2478 | if (status.kind () != TARGET_WAITKIND_SPURIOUS) |
e3cfc1c7 | 2479 | break; |
52834460 | 2480 | |
e3cfc1c7 MM |
2481 | btinfo->flags |= flags; |
2482 | return btrace_step_again (); | |
2483 | } | |
d825d248 | 2484 | |
f6ac5f3d | 2485 | /* We keep threads moving at the end of their execution history. The wait |
e3cfc1c7 | 2486 | method will stop the thread for whom the event is reported. */ |
183be222 | 2487 | if (status.kind () == TARGET_WAITKIND_NO_HISTORY) |
e3cfc1c7 | 2488 | btinfo->flags |= flags; |
52834460 | 2489 | |
e3cfc1c7 | 2490 | return status; |
b2f4cfde MM |
2491 | } |
2492 | ||
a6b5be76 MM |
2493 | /* Announce further events if necessary. */ |
2494 | ||
2495 | static void | |
53127008 SM |
2496 | record_btrace_maybe_mark_async_event |
2497 | (const std::vector<thread_info *> &moving, | |
2498 | const std::vector<thread_info *> &no_history) | |
a6b5be76 | 2499 | { |
53127008 SM |
2500 | bool more_moving = !moving.empty (); |
2501 | bool more_no_history = !no_history.empty ();; | |
a6b5be76 MM |
2502 | |
2503 | if (!more_moving && !more_no_history) | |
2504 | return; | |
2505 | ||
2506 | if (more_moving) | |
2507 | DEBUG ("movers pending"); | |
2508 | ||
2509 | if (more_no_history) | |
2510 | DEBUG ("no-history pending"); | |
2511 | ||
2512 | mark_async_event_handler (record_btrace_async_inferior_event_handler); | |
2513 | } | |
2514 | ||
f6ac5f3d | 2515 | /* The wait method of target record-btrace. */ |
b2f4cfde | 2516 | |
f6ac5f3d PA |
2517 | ptid_t |
2518 | record_btrace_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
b60cea74 | 2519 | target_wait_flags options) |
b2f4cfde | 2520 | { |
53127008 SM |
2521 | std::vector<thread_info *> moving; |
2522 | std::vector<thread_info *> no_history; | |
52834460 | 2523 | |
85d3ad8e SM |
2524 | /* Clear this, if needed we'll re-mark it below. */ |
2525 | clear_async_event_handler (record_btrace_async_inferior_event_handler); | |
2526 | ||
e53c95d4 | 2527 | DEBUG ("wait %s (0x%x)", ptid.to_string ().c_str (), |
b60cea74 | 2528 | (unsigned) options); |
52834460 | 2529 | |
b2f4cfde | 2530 | /* As long as we're not replaying, just forward the request. */ |
f6ac5f3d PA |
2531 | if ((::execution_direction != EXEC_REVERSE) |
2532 | && !record_is_replaying (minus_one_ptid)) | |
b2f4cfde | 2533 | { |
b6a8c27b | 2534 | return this->beneath ()->wait (ptid, status, options); |
b2f4cfde MM |
2535 | } |
2536 | ||
e3cfc1c7 | 2537 | /* Keep a work list of moving threads. */ |
5b6d1e4f PA |
2538 | process_stratum_target *proc_target = current_inferior ()->process_target (); |
2539 | for (thread_info *tp : all_non_exited_threads (proc_target, ptid)) | |
08036331 PA |
2540 | if ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0) |
2541 | moving.push_back (tp); | |
e3cfc1c7 | 2542 | |
53127008 | 2543 | if (moving.empty ()) |
52834460 | 2544 | { |
e3cfc1c7 | 2545 | *status = btrace_step_no_resumed (); |
52834460 | 2546 | |
e53c95d4 | 2547 | DEBUG ("wait ended by %s: %s", null_ptid.to_string ().c_str (), |
7dca2ea7 | 2548 | status->to_string ().c_str ()); |
e3cfc1c7 | 2549 | |
e3cfc1c7 | 2550 | return null_ptid; |
52834460 MM |
2551 | } |
2552 | ||
e3cfc1c7 MM |
2553 | /* Step moving threads one by one, one step each, until either one thread |
2554 | reports an event or we run out of threads to step. | |
2555 | ||
2556 | When stepping more than one thread, chances are that some threads reach | |
2557 | the end of their execution history earlier than others. If we reported | |
2558 | this immediately, all-stop on top of non-stop would stop all threads and | |
2559 | resume the same threads next time. And we would report the same thread | |
2560 | having reached the end of its execution history again. | |
2561 | ||
2562 | In the worst case, this would starve the other threads. But even if other | |
2563 | threads would be allowed to make progress, this would result in far too | |
2564 | many intermediate stops. | |
2565 | ||
2566 | We therefore delay the reporting of "no execution history" until we have | |
2567 | nothing else to report. By this time, all threads should have moved to | |
2568 | either the beginning or the end of their execution history. There will | |
2569 | be a single user-visible stop. */ | |
53127008 SM |
2570 | struct thread_info *eventing = NULL; |
2571 | while ((eventing == NULL) && !moving.empty ()) | |
e3cfc1c7 | 2572 | { |
53127008 | 2573 | for (unsigned int ix = 0; eventing == NULL && ix < moving.size ();) |
e3cfc1c7 | 2574 | { |
53127008 SM |
2575 | thread_info *tp = moving[ix]; |
2576 | ||
e3cfc1c7 MM |
2577 | *status = record_btrace_step_thread (tp); |
2578 | ||
183be222 | 2579 | switch (status->kind ()) |
e3cfc1c7 MM |
2580 | { |
2581 | case TARGET_WAITKIND_IGNORE: | |
2582 | ix++; | |
2583 | break; | |
2584 | ||
2585 | case TARGET_WAITKIND_NO_HISTORY: | |
53127008 | 2586 | no_history.push_back (ordered_remove (moving, ix)); |
e3cfc1c7 MM |
2587 | break; |
2588 | ||
2589 | default: | |
53127008 | 2590 | eventing = unordered_remove (moving, ix); |
e3cfc1c7 MM |
2591 | break; |
2592 | } | |
2593 | } | |
2594 | } | |
2595 | ||
2596 | if (eventing == NULL) | |
2597 | { | |
2598 | /* We started with at least one moving thread. This thread must have | |
2599 | either stopped or reached the end of its execution history. | |
2600 | ||
2601 | In the former case, EVENTING must not be NULL. | |
2602 | In the latter case, NO_HISTORY must not be empty. */ | |
53127008 | 2603 | gdb_assert (!no_history.empty ()); |
e3cfc1c7 MM |
2604 | |
2605 | /* We kept threads moving at the end of their execution history. Stop | |
2606 | EVENTING now that we are going to report its stop. */ | |
53127008 | 2607 | eventing = unordered_remove (no_history, 0); |
e3cfc1c7 MM |
2608 | eventing->btrace.flags &= ~BTHR_MOVE; |
2609 | ||
2610 | *status = btrace_step_no_history (); | |
2611 | } | |
2612 | ||
2613 | gdb_assert (eventing != NULL); | |
2614 | ||
2615 | /* We kept threads replaying at the end of their execution history. Stop | |
2616 | replaying EVENTING now that we are going to report its stop. */ | |
2617 | record_btrace_stop_replaying_at_end (eventing); | |
52834460 MM |
2618 | |
2619 | /* Stop all other threads. */ | |
5953356c | 2620 | if (!target_is_non_stop_p ()) |
53127008 | 2621 | { |
d89edf9b | 2622 | for (thread_info *tp : current_inferior ()->non_exited_threads ()) |
53127008 SM |
2623 | record_btrace_cancel_resume (tp); |
2624 | } | |
52834460 | 2625 | |
a6b5be76 MM |
2626 | /* In async mode, we need to announce further events. */ |
2627 | if (target_is_async_p ()) | |
2628 | record_btrace_maybe_mark_async_event (moving, no_history); | |
2629 | ||
52834460 | 2630 | /* Start record histories anew from the current position. */ |
e3cfc1c7 | 2631 | record_btrace_clear_histories (&eventing->btrace); |
52834460 MM |
2632 | |
2633 | /* We moved the replay position but did not update registers. */ | |
00431a78 | 2634 | registers_changed_thread (eventing); |
e3cfc1c7 | 2635 | |
43792cf0 PA |
2636 | DEBUG ("wait ended by thread %s (%s): %s", |
2637 | print_thread_id (eventing), | |
e53c95d4 | 2638 | eventing->ptid.to_string ().c_str (), |
7dca2ea7 | 2639 | status->to_string ().c_str ()); |
52834460 | 2640 | |
e3cfc1c7 | 2641 | return eventing->ptid; |
52834460 MM |
2642 | } |
2643 | ||
f6ac5f3d | 2644 | /* The stop method of target record-btrace. */ |
6e4879f0 | 2645 | |
f6ac5f3d PA |
2646 | void |
2647 | record_btrace_target::stop (ptid_t ptid) | |
6e4879f0 | 2648 | { |
e53c95d4 | 2649 | DEBUG ("stop %s", ptid.to_string ().c_str ()); |
6e4879f0 MM |
2650 | |
2651 | /* As long as we're not replaying, just forward the request. */ | |
f6ac5f3d PA |
2652 | if ((::execution_direction != EXEC_REVERSE) |
2653 | && !record_is_replaying (minus_one_ptid)) | |
6e4879f0 | 2654 | { |
b6a8c27b | 2655 | this->beneath ()->stop (ptid); |
6e4879f0 MM |
2656 | } |
2657 | else | |
2658 | { | |
5b6d1e4f PA |
2659 | process_stratum_target *proc_target |
2660 | = current_inferior ()->process_target (); | |
2661 | ||
2662 | for (thread_info *tp : all_non_exited_threads (proc_target, ptid)) | |
08036331 PA |
2663 | { |
2664 | tp->btrace.flags &= ~BTHR_MOVE; | |
2665 | tp->btrace.flags |= BTHR_STOP; | |
2666 | } | |
6e4879f0 MM |
2667 | } |
2668 | } | |
2669 | ||
f6ac5f3d | 2670 | /* The can_execute_reverse method of target record-btrace. */ |
52834460 | 2671 | |
57810aa7 | 2672 | bool |
f6ac5f3d | 2673 | record_btrace_target::can_execute_reverse () |
52834460 | 2674 | { |
57810aa7 | 2675 | return true; |
52834460 MM |
2676 | } |
2677 | ||
f6ac5f3d | 2678 | /* The stopped_by_sw_breakpoint method of target record-btrace. */ |
52834460 | 2679 | |
57810aa7 | 2680 | bool |
f6ac5f3d | 2681 | record_btrace_target::stopped_by_sw_breakpoint () |
52834460 | 2682 | { |
f6ac5f3d | 2683 | if (record_is_replaying (minus_one_ptid)) |
9e8915c6 PA |
2684 | { |
2685 | struct thread_info *tp = inferior_thread (); | |
2686 | ||
2687 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
2688 | } | |
2689 | ||
b6a8c27b | 2690 | return this->beneath ()->stopped_by_sw_breakpoint (); |
9e8915c6 PA |
2691 | } |
2692 | ||
f6ac5f3d | 2693 | /* The supports_stopped_by_sw_breakpoint method of target |
9e8915c6 PA |
2694 | record-btrace. */ |
2695 | ||
57810aa7 | 2696 | bool |
f6ac5f3d | 2697 | record_btrace_target::supports_stopped_by_sw_breakpoint () |
9e8915c6 | 2698 | { |
f6ac5f3d | 2699 | if (record_is_replaying (minus_one_ptid)) |
57810aa7 | 2700 | return true; |
9e8915c6 | 2701 | |
b6a8c27b | 2702 | return this->beneath ()->supports_stopped_by_sw_breakpoint (); |
9e8915c6 PA |
2703 | } |
2704 | ||
f6ac5f3d | 2705 | /* The stopped_by_sw_breakpoint method of target record-btrace. */ |
9e8915c6 | 2706 | |
57810aa7 | 2707 | bool |
f6ac5f3d | 2708 | record_btrace_target::stopped_by_hw_breakpoint () |
9e8915c6 | 2709 | { |
f6ac5f3d | 2710 | if (record_is_replaying (minus_one_ptid)) |
9e8915c6 PA |
2711 | { |
2712 | struct thread_info *tp = inferior_thread (); | |
2713 | ||
2714 | return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
2715 | } | |
2716 | ||
b6a8c27b | 2717 | return this->beneath ()->stopped_by_hw_breakpoint (); |
9e8915c6 PA |
2718 | } |
2719 | ||
f6ac5f3d | 2720 | /* The supports_stopped_by_hw_breakpoint method of target |
9e8915c6 PA |
2721 | record-btrace. */ |
2722 | ||
57810aa7 | 2723 | bool |
f6ac5f3d | 2724 | record_btrace_target::supports_stopped_by_hw_breakpoint () |
9e8915c6 | 2725 | { |
f6ac5f3d | 2726 | if (record_is_replaying (minus_one_ptid)) |
57810aa7 | 2727 | return true; |
52834460 | 2728 | |
b6a8c27b | 2729 | return this->beneath ()->supports_stopped_by_hw_breakpoint (); |
b2f4cfde MM |
2730 | } |
2731 | ||
f6ac5f3d | 2732 | /* The update_thread_list method of target record-btrace. */ |
e2887aa3 | 2733 | |
f6ac5f3d PA |
2734 | void |
2735 | record_btrace_target::update_thread_list () | |
e2887aa3 | 2736 | { |
e8032dde | 2737 | /* We don't add or remove threads during replay. */ |
f6ac5f3d | 2738 | if (record_is_replaying (minus_one_ptid)) |
e2887aa3 MM |
2739 | return; |
2740 | ||
2741 | /* Forward the request. */ | |
b6a8c27b | 2742 | this->beneath ()->update_thread_list (); |
e2887aa3 MM |
2743 | } |
2744 | ||
f6ac5f3d | 2745 | /* The thread_alive method of target record-btrace. */ |
e2887aa3 | 2746 | |
57810aa7 | 2747 | bool |
f6ac5f3d | 2748 | record_btrace_target::thread_alive (ptid_t ptid) |
e2887aa3 MM |
2749 | { |
2750 | /* We don't add or remove threads during replay. */ | |
f6ac5f3d | 2751 | if (record_is_replaying (minus_one_ptid)) |
00431a78 | 2752 | return true; |
e2887aa3 MM |
2753 | |
2754 | /* Forward the request. */ | |
b6a8c27b | 2755 | return this->beneath ()->thread_alive (ptid); |
e2887aa3 MM |
2756 | } |
2757 | ||
066ce621 MM |
2758 | /* Set the replay branch trace instruction iterator. If IT is NULL, replay |
2759 | is stopped. */ | |
2760 | ||
2761 | static void | |
2762 | record_btrace_set_replay (struct thread_info *tp, | |
2763 | const struct btrace_insn_iterator *it) | |
2764 | { | |
2765 | struct btrace_thread_info *btinfo; | |
2766 | ||
2767 | btinfo = &tp->btrace; | |
2768 | ||
a0f1b963 | 2769 | if (it == NULL) |
52834460 | 2770 | record_btrace_stop_replaying (tp); |
066ce621 MM |
2771 | else |
2772 | { | |
2773 | if (btinfo->replay == NULL) | |
52834460 | 2774 | record_btrace_start_replaying (tp); |
066ce621 MM |
2775 | else if (btrace_insn_cmp (btinfo->replay, it) == 0) |
2776 | return; | |
2777 | ||
2778 | *btinfo->replay = *it; | |
00431a78 | 2779 | registers_changed_thread (tp); |
066ce621 MM |
2780 | } |
2781 | ||
52834460 MM |
2782 | /* Start anew from the new replay position. */ |
2783 | record_btrace_clear_histories (btinfo); | |
485668e5 | 2784 | |
1edb66d8 | 2785 | inferior_thread ()->set_stop_pc (regcache_read_pc (get_current_regcache ())); |
485668e5 | 2786 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
066ce621 MM |
2787 | } |
2788 | ||
f6ac5f3d | 2789 | /* The goto_record_begin method of target record-btrace. */ |
066ce621 | 2790 | |
f6ac5f3d PA |
2791 | void |
2792 | record_btrace_target::goto_record_begin () | |
066ce621 MM |
2793 | { |
2794 | struct thread_info *tp; | |
2795 | struct btrace_insn_iterator begin; | |
2796 | ||
2797 | tp = require_btrace_thread (); | |
2798 | ||
2799 | btrace_insn_begin (&begin, &tp->btrace); | |
b61ce85c MM |
2800 | |
2801 | /* Skip gaps at the beginning of the trace. */ | |
2802 | while (btrace_insn_get (&begin) == NULL) | |
2803 | { | |
2804 | unsigned int steps; | |
2805 | ||
2806 | steps = btrace_insn_next (&begin, 1); | |
2807 | if (steps == 0) | |
2808 | error (_("No trace.")); | |
2809 | } | |
2810 | ||
066ce621 | 2811 | record_btrace_set_replay (tp, &begin); |
066ce621 MM |
2812 | } |
2813 | ||
f6ac5f3d | 2814 | /* The goto_record_end method of target record-btrace. */ |
066ce621 | 2815 | |
f6ac5f3d PA |
2816 | void |
2817 | record_btrace_target::goto_record_end () | |
066ce621 MM |
2818 | { |
2819 | struct thread_info *tp; | |
2820 | ||
2821 | tp = require_btrace_thread (); | |
2822 | ||
2823 | record_btrace_set_replay (tp, NULL); | |
066ce621 MM |
2824 | } |
2825 | ||
f6ac5f3d | 2826 | /* The goto_record method of target record-btrace. */ |
066ce621 | 2827 | |
f6ac5f3d PA |
2828 | void |
2829 | record_btrace_target::goto_record (ULONGEST insn) | |
066ce621 MM |
2830 | { |
2831 | struct thread_info *tp; | |
2832 | struct btrace_insn_iterator it; | |
2833 | unsigned int number; | |
2834 | int found; | |
2835 | ||
2836 | number = insn; | |
2837 | ||
2838 | /* Check for wrap-arounds. */ | |
2839 | if (number != insn) | |
2840 | error (_("Instruction number out of range.")); | |
2841 | ||
2842 | tp = require_btrace_thread (); | |
2843 | ||
2844 | found = btrace_find_insn_by_number (&it, &tp->btrace, number); | |
69090cee TW |
2845 | |
2846 | /* Check if the instruction could not be found or is a gap. */ | |
2847 | if (found == 0 || btrace_insn_get (&it) == NULL) | |
066ce621 MM |
2848 | error (_("No such instruction.")); |
2849 | ||
2850 | record_btrace_set_replay (tp, &it); | |
066ce621 MM |
2851 | } |
2852 | ||
f6ac5f3d | 2853 | /* The record_stop_replaying method of target record-btrace. */ |
797094dd | 2854 | |
f6ac5f3d PA |
2855 | void |
2856 | record_btrace_target::record_stop_replaying () | |
797094dd | 2857 | { |
d89edf9b | 2858 | for (thread_info *tp : current_inferior ()->non_exited_threads ()) |
797094dd MM |
2859 | record_btrace_stop_replaying (tp); |
2860 | } | |
2861 | ||
f6ac5f3d | 2862 | /* The execution_direction target method. */ |
70ad5bff | 2863 | |
f6ac5f3d PA |
2864 | enum exec_direction_kind |
2865 | record_btrace_target::execution_direction () | |
70ad5bff MM |
2866 | { |
2867 | return record_btrace_resume_exec_dir; | |
2868 | } | |
2869 | ||
f6ac5f3d | 2870 | /* The prepare_to_generate_core target method. */ |
aef92902 | 2871 | |
f6ac5f3d PA |
2872 | void |
2873 | record_btrace_target::prepare_to_generate_core () | |
aef92902 MM |
2874 | { |
2875 | record_btrace_generating_corefile = 1; | |
2876 | } | |
2877 | ||
f6ac5f3d | 2878 | /* The done_generating_core target method. */ |
aef92902 | 2879 | |
f6ac5f3d PA |
2880 | void |
2881 | record_btrace_target::done_generating_core () | |
aef92902 MM |
2882 | { |
2883 | record_btrace_generating_corefile = 0; | |
2884 | } | |
2885 | ||
f4abbc16 MM |
2886 | /* Start recording in BTS format. */ |
2887 | ||
2888 | static void | |
cdb34d4a | 2889 | cmd_record_btrace_bts_start (const char *args, int from_tty) |
f4abbc16 | 2890 | { |
f4abbc16 MM |
2891 | if (args != NULL && *args != 0) |
2892 | error (_("Invalid argument.")); | |
2893 | ||
2894 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2895 | ||
a70b8144 | 2896 | try |
492d29ea | 2897 | { |
95a6b0a1 | 2898 | execute_command ("target record-btrace", from_tty); |
492d29ea | 2899 | } |
230d2906 | 2900 | catch (const gdb_exception &exception) |
f4abbc16 MM |
2901 | { |
2902 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
eedc3f4f | 2903 | throw; |
f4abbc16 MM |
2904 | } |
2905 | } | |
2906 | ||
bc504a31 | 2907 | /* Start recording in Intel Processor Trace format. */ |
afedecd3 MM |
2908 | |
2909 | static void | |
cdb34d4a | 2910 | cmd_record_btrace_pt_start (const char *args, int from_tty) |
afedecd3 MM |
2911 | { |
2912 | if (args != NULL && *args != 0) | |
2913 | error (_("Invalid argument.")); | |
2914 | ||
b20a6524 | 2915 | record_btrace_conf.format = BTRACE_FORMAT_PT; |
f4abbc16 | 2916 | |
a70b8144 | 2917 | try |
492d29ea | 2918 | { |
95a6b0a1 | 2919 | execute_command ("target record-btrace", from_tty); |
492d29ea | 2920 | } |
230d2906 | 2921 | catch (const gdb_exception &exception) |
492d29ea PA |
2922 | { |
2923 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
eedc3f4f | 2924 | throw; |
492d29ea | 2925 | } |
afedecd3 MM |
2926 | } |
2927 | ||
b20a6524 MM |
2928 | /* Alias for "target record". */ |
2929 | ||
2930 | static void | |
981a3fb3 | 2931 | cmd_record_btrace_start (const char *args, int from_tty) |
b20a6524 MM |
2932 | { |
2933 | if (args != NULL && *args != 0) | |
2934 | error (_("Invalid argument.")); | |
2935 | ||
2936 | record_btrace_conf.format = BTRACE_FORMAT_PT; | |
2937 | ||
a70b8144 | 2938 | try |
b20a6524 | 2939 | { |
95a6b0a1 | 2940 | execute_command ("target record-btrace", from_tty); |
b20a6524 | 2941 | } |
b1ffd112 | 2942 | catch (const gdb_exception_error &exception) |
b20a6524 MM |
2943 | { |
2944 | record_btrace_conf.format = BTRACE_FORMAT_BTS; | |
2945 | ||
a70b8144 | 2946 | try |
b20a6524 | 2947 | { |
95a6b0a1 | 2948 | execute_command ("target record-btrace", from_tty); |
b20a6524 | 2949 | } |
230d2906 | 2950 | catch (const gdb_exception &ex) |
b20a6524 MM |
2951 | { |
2952 | record_btrace_conf.format = BTRACE_FORMAT_NONE; | |
eedc3f4f | 2953 | throw; |
b20a6524 | 2954 | } |
b20a6524 | 2955 | } |
b20a6524 MM |
2956 | } |
2957 | ||
67b5c0c1 MM |
2958 | /* The "show record btrace replay-memory-access" command. */ |
2959 | ||
2960 | static void | |
2961 | cmd_show_replay_memory_access (struct ui_file *file, int from_tty, | |
2962 | struct cmd_list_element *c, const char *value) | |
2963 | { | |
6cb06a8c TT |
2964 | gdb_printf (file, _("Replay memory access is %s.\n"), |
2965 | replay_memory_access); | |
67b5c0c1 MM |
2966 | } |
2967 | ||
4a4495d6 MM |
2968 | /* The "set record btrace cpu none" command. */ |
2969 | ||
2970 | static void | |
2971 | cmd_set_record_btrace_cpu_none (const char *args, int from_tty) | |
2972 | { | |
2973 | if (args != nullptr && *args != 0) | |
2974 | error (_("Trailing junk: '%s'."), args); | |
2975 | ||
2976 | record_btrace_cpu_state = CS_NONE; | |
2977 | } | |
2978 | ||
2979 | /* The "set record btrace cpu auto" command. */ | |
2980 | ||
2981 | static void | |
2982 | cmd_set_record_btrace_cpu_auto (const char *args, int from_tty) | |
2983 | { | |
2984 | if (args != nullptr && *args != 0) | |
2985 | error (_("Trailing junk: '%s'."), args); | |
2986 | ||
2987 | record_btrace_cpu_state = CS_AUTO; | |
2988 | } | |
2989 | ||
2990 | /* The "set record btrace cpu" command. */ | |
2991 | ||
2992 | static void | |
2993 | cmd_set_record_btrace_cpu (const char *args, int from_tty) | |
2994 | { | |
2995 | if (args == nullptr) | |
2996 | args = ""; | |
2997 | ||
2998 | /* We use a hard-coded vendor string for now. */ | |
2999 | unsigned int family, model, stepping; | |
3000 | int l1, l2, matches = sscanf (args, "intel: %u/%u%n/%u%n", &family, | |
3001 | &model, &l1, &stepping, &l2); | |
3002 | if (matches == 3) | |
3003 | { | |
3004 | if (strlen (args) != l2) | |
3005 | error (_("Trailing junk: '%s'."), args + l2); | |
3006 | } | |
3007 | else if (matches == 2) | |
3008 | { | |
3009 | if (strlen (args) != l1) | |
3010 | error (_("Trailing junk: '%s'."), args + l1); | |
3011 | ||
3012 | stepping = 0; | |
3013 | } | |
3014 | else | |
3015 | error (_("Bad format. See \"help set record btrace cpu\".")); | |
3016 | ||
3017 | if (USHRT_MAX < family) | |
3018 | error (_("Cpu family too big.")); | |
3019 | ||
3020 | if (UCHAR_MAX < model) | |
3021 | error (_("Cpu model too big.")); | |
3022 | ||
3023 | if (UCHAR_MAX < stepping) | |
3024 | error (_("Cpu stepping too big.")); | |
3025 | ||
3026 | record_btrace_cpu.vendor = CV_INTEL; | |
3027 | record_btrace_cpu.family = family; | |
3028 | record_btrace_cpu.model = model; | |
3029 | record_btrace_cpu.stepping = stepping; | |
3030 | ||
3031 | record_btrace_cpu_state = CS_CPU; | |
3032 | } | |
3033 | ||
3034 | /* The "show record btrace cpu" command. */ | |
3035 | ||
3036 | static void | |
3037 | cmd_show_record_btrace_cpu (const char *args, int from_tty) | |
3038 | { | |
4a4495d6 MM |
3039 | if (args != nullptr && *args != 0) |
3040 | error (_("Trailing junk: '%s'."), args); | |
3041 | ||
3042 | switch (record_btrace_cpu_state) | |
3043 | { | |
3044 | case CS_AUTO: | |
6cb06a8c | 3045 | gdb_printf (_("btrace cpu is 'auto'.\n")); |
4a4495d6 MM |
3046 | return; |
3047 | ||
3048 | case CS_NONE: | |
6cb06a8c | 3049 | gdb_printf (_("btrace cpu is 'none'.\n")); |
4a4495d6 MM |
3050 | return; |
3051 | ||
3052 | case CS_CPU: | |
3053 | switch (record_btrace_cpu.vendor) | |
3054 | { | |
3055 | case CV_INTEL: | |
3056 | if (record_btrace_cpu.stepping == 0) | |
6cb06a8c TT |
3057 | gdb_printf (_("btrace cpu is 'intel: %u/%u'.\n"), |
3058 | record_btrace_cpu.family, | |
3059 | record_btrace_cpu.model); | |
4a4495d6 | 3060 | else |
6cb06a8c TT |
3061 | gdb_printf (_("btrace cpu is 'intel: %u/%u/%u'.\n"), |
3062 | record_btrace_cpu.family, | |
3063 | record_btrace_cpu.model, | |
3064 | record_btrace_cpu.stepping); | |
4a4495d6 MM |
3065 | return; |
3066 | } | |
3067 | } | |
3068 | ||
3069 | error (_("Internal error: bad cpu state.")); | |
3070 | } | |
3071 | ||
b20a6524 MM |
3072 | /* The "record bts buffer-size" show value function. */ |
3073 | ||
3074 | static void | |
3075 | show_record_bts_buffer_size_value (struct ui_file *file, int from_tty, | |
3076 | struct cmd_list_element *c, | |
3077 | const char *value) | |
3078 | { | |
6cb06a8c TT |
3079 | gdb_printf (file, _("The record/replay bts buffer size is %s.\n"), |
3080 | value); | |
b20a6524 MM |
3081 | } |
3082 | ||
3083 | /* The "record pt buffer-size" show value function. */ | |
3084 | ||
3085 | static void | |
3086 | show_record_pt_buffer_size_value (struct ui_file *file, int from_tty, | |
3087 | struct cmd_list_element *c, | |
3088 | const char *value) | |
3089 | { | |
6cb06a8c TT |
3090 | gdb_printf (file, _("The record/replay pt buffer size is %s.\n"), |
3091 | value); | |
b20a6524 MM |
3092 | } |
3093 | ||
afedecd3 MM |
3094 | /* Initialize btrace commands. */ |
3095 | ||
6c265988 | 3096 | void _initialize_record_btrace (); |
afedecd3 | 3097 | void |
6c265988 | 3098 | _initialize_record_btrace () |
afedecd3 | 3099 | { |
5e84b7ee SM |
3100 | cmd_list_element *record_btrace_cmd |
3101 | = add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start, | |
3102 | _("Start branch trace recording."), | |
3103 | &record_btrace_cmdlist, 0, &record_cmdlist); | |
3104 | add_alias_cmd ("b", record_btrace_cmd, class_obscure, 1, &record_cmdlist); | |
3105 | ||
3106 | cmd_list_element *record_btrace_bts_cmd | |
3107 | = add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start, | |
3108 | _("\ | |
f4abbc16 MM |
3109 | Start branch trace recording in Branch Trace Store (BTS) format.\n\n\ |
3110 | The processor stores a from/to record for each branch into a cyclic buffer.\n\ | |
3111 | This format may not be available on all processors."), | |
5e84b7ee SM |
3112 | &record_btrace_cmdlist); |
3113 | add_alias_cmd ("bts", record_btrace_bts_cmd, class_obscure, 1, | |
3114 | &record_cmdlist); | |
f4abbc16 | 3115 | |
5e84b7ee SM |
3116 | cmd_list_element *record_btrace_pt_cmd |
3117 | = add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start, | |
3118 | _("\ | |
bc504a31 | 3119 | Start branch trace recording in Intel Processor Trace format.\n\n\ |
b20a6524 | 3120 | This format may not be available on all processors."), |
5e84b7ee SM |
3121 | &record_btrace_cmdlist); |
3122 | add_alias_cmd ("pt", record_btrace_pt_cmd, class_obscure, 1, &record_cmdlist); | |
b20a6524 | 3123 | |
f54bdb6d SM |
3124 | add_setshow_prefix_cmd ("btrace", class_support, |
3125 | _("Set record options."), | |
3126 | _("Show record options."), | |
3127 | &set_record_btrace_cmdlist, | |
3128 | &show_record_btrace_cmdlist, | |
3129 | &set_record_cmdlist, &show_record_cmdlist); | |
67b5c0c1 MM |
3130 | |
3131 | add_setshow_enum_cmd ("replay-memory-access", no_class, | |
3132 | replay_memory_access_types, &replay_memory_access, _("\ | |
3133 | Set what memory accesses are allowed during replay."), _("\ | |
3134 | Show what memory accesses are allowed during replay."), | |
3135 | _("Default is READ-ONLY.\n\n\ | |
3136 | The btrace record target does not trace data.\n\ | |
3137 | The memory therefore corresponds to the live target and not \ | |
3138 | to the current replay position.\n\n\ | |
3139 | When READ-ONLY, allow accesses to read-only memory during replay.\n\ | |
3140 | When READ-WRITE, allow accesses to read-only and read-write memory during \ | |
3141 | replay."), | |
3142 | NULL, cmd_show_replay_memory_access, | |
3143 | &set_record_btrace_cmdlist, | |
3144 | &show_record_btrace_cmdlist); | |
3145 | ||
4a4495d6 MM |
3146 | add_prefix_cmd ("cpu", class_support, cmd_set_record_btrace_cpu, |
3147 | _("\ | |
3148 | Set the cpu to be used for trace decode.\n\n\ | |
55063ddb TT |
3149 | The format is \"VENDOR:IDENTIFIER\" or \"none\" or \"auto\" (default).\n\ |
3150 | For vendor \"intel\" the format is \"FAMILY/MODEL[/STEPPING]\".\n\n\ | |
4a4495d6 MM |
3151 | When decoding branch trace, enable errata workarounds for the specified cpu.\n\ |
3152 | The default is \"auto\", which uses the cpu on which the trace was recorded.\n\ | |
3153 | When GDB does not support that cpu, this option can be used to enable\n\ | |
3154 | workarounds for a similar cpu that GDB supports.\n\n\ | |
3155 | When set to \"none\", errata workarounds are disabled."), | |
3156 | &set_record_btrace_cpu_cmdlist, | |
2f822da5 | 3157 | 1, |
4a4495d6 MM |
3158 | &set_record_btrace_cmdlist); |
3159 | ||
3160 | add_cmd ("auto", class_support, cmd_set_record_btrace_cpu_auto, _("\ | |
3161 | Automatically determine the cpu to be used for trace decode."), | |
3162 | &set_record_btrace_cpu_cmdlist); | |
3163 | ||
3164 | add_cmd ("none", class_support, cmd_set_record_btrace_cpu_none, _("\ | |
3165 | Do not enable errata workarounds for trace decode."), | |
3166 | &set_record_btrace_cpu_cmdlist); | |
3167 | ||
3168 | add_cmd ("cpu", class_support, cmd_show_record_btrace_cpu, _("\ | |
3169 | Show the cpu to be used for trace decode."), | |
3170 | &show_record_btrace_cmdlist); | |
3171 | ||
f54bdb6d SM |
3172 | add_setshow_prefix_cmd ("bts", class_support, |
3173 | _("Set record btrace bts options."), | |
3174 | _("Show record btrace bts options."), | |
3175 | &set_record_btrace_bts_cmdlist, | |
3176 | &show_record_btrace_bts_cmdlist, | |
3177 | &set_record_btrace_cmdlist, | |
3178 | &show_record_btrace_cmdlist); | |
d33501a5 MM |
3179 | |
3180 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3181 | &record_btrace_conf.bts.size, | |
3182 | _("Set the record/replay bts buffer size."), | |
3183 | _("Show the record/replay bts buffer size."), _("\ | |
3184 | When starting recording request a trace buffer of this size. \ | |
3185 | The actual buffer size may differ from the requested size. \ | |
3186 | Use \"info record\" to see the actual buffer size.\n\n\ | |
3187 | Bigger buffers allow longer recording but also take more time to process \ | |
3188 | the recorded execution trace.\n\n\ | |
b20a6524 MM |
3189 | The trace buffer size may not be changed while recording."), NULL, |
3190 | show_record_bts_buffer_size_value, | |
d33501a5 MM |
3191 | &set_record_btrace_bts_cmdlist, |
3192 | &show_record_btrace_bts_cmdlist); | |
3193 | ||
f54bdb6d SM |
3194 | add_setshow_prefix_cmd ("pt", class_support, |
3195 | _("Set record btrace pt options."), | |
3196 | _("Show record btrace pt options."), | |
3197 | &set_record_btrace_pt_cmdlist, | |
3198 | &show_record_btrace_pt_cmdlist, | |
3199 | &set_record_btrace_cmdlist, | |
3200 | &show_record_btrace_cmdlist); | |
b20a6524 MM |
3201 | |
3202 | add_setshow_uinteger_cmd ("buffer-size", no_class, | |
3203 | &record_btrace_conf.pt.size, | |
3204 | _("Set the record/replay pt buffer size."), | |
3205 | _("Show the record/replay pt buffer size."), _("\ | |
3206 | Bigger buffers allow longer recording but also take more time to process \ | |
3207 | the recorded execution.\n\ | |
3208 | The actual buffer size may differ from the requested size. Use \"info record\" \ | |
3209 | to see the actual buffer size."), NULL, show_record_pt_buffer_size_value, | |
3210 | &set_record_btrace_pt_cmdlist, | |
3211 | &show_record_btrace_pt_cmdlist); | |
3212 | ||
d9f719f1 | 3213 | add_target (record_btrace_target_info, record_btrace_target_open); |
0b722aec MM |
3214 | |
3215 | bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL, | |
3216 | xcalloc, xfree); | |
d33501a5 MM |
3217 | |
3218 | record_btrace_conf.bts.size = 64 * 1024; | |
b20a6524 | 3219 | record_btrace_conf.pt.size = 16 * 1024; |
afedecd3 | 3220 | } |