]>
Commit | Line | Data |
---|---|---|
3f067dca | 1 | #include "callchain.h" |
b0a7d1a0 ACM |
2 | #include "debug.h" |
3 | #include "event.h" | |
3f067dca ACM |
4 | #include "evsel.h" |
5 | #include "hist.h" | |
9d2f8e22 ACM |
6 | #include "machine.h" |
7 | #include "map.h" | |
3f067dca | 8 | #include "sort.h" |
69d2591a | 9 | #include "strlist.h" |
9d2f8e22 | 10 | #include "thread.h" |
d027b640 | 11 | #include "vdso.h" |
9d2f8e22 | 12 | #include <stdbool.h> |
c506c96b | 13 | #include <symbol/kallsyms.h> |
3f067dca | 14 | #include "unwind.h" |
8b7bad58 | 15 | #include "linux/hash.h" |
9d2f8e22 | 16 | |
b91fc39f ACM |
17 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock); |
18 | ||
e167f995 ACM |
19 | static void dsos__init(struct dsos *dsos) |
20 | { | |
21 | INIT_LIST_HEAD(&dsos->head); | |
22 | dsos->root = RB_ROOT; | |
23 | } | |
24 | ||
69d2591a ACM |
25 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
26 | { | |
11246c70 | 27 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 28 | RB_CLEAR_NODE(&machine->rb_node); |
3d39ac53 | 29 | dsos__init(&machine->dsos); |
69d2591a ACM |
30 | |
31 | machine->threads = RB_ROOT; | |
b91fc39f | 32 | pthread_rwlock_init(&machine->threads_lock, NULL); |
69d2591a ACM |
33 | INIT_LIST_HEAD(&machine->dead_threads); |
34 | machine->last_match = NULL; | |
35 | ||
d027b640 AH |
36 | machine->vdso_info = NULL; |
37 | ||
69d2591a ACM |
38 | machine->pid = pid; |
39 | ||
611a5ce8 | 40 | machine->symbol_filter = NULL; |
14bd6d20 | 41 | machine->id_hdr_size = 0; |
cfe1c414 | 42 | machine->comm_exec = false; |
fbe2af45 | 43 | machine->kernel_start = 0; |
611a5ce8 | 44 | |
69d2591a ACM |
45 | machine->root_dir = strdup(root_dir); |
46 | if (machine->root_dir == NULL) | |
47 | return -ENOMEM; | |
48 | ||
49 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 50 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 51 | pid); |
69d2591a ACM |
52 | char comm[64]; |
53 | ||
54 | if (thread == NULL) | |
55 | return -ENOMEM; | |
56 | ||
57 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 58 | thread__set_comm(thread, comm, 0); |
b91fc39f | 59 | thread__put(thread); |
69d2591a ACM |
60 | } |
61 | ||
b9d266ba AH |
62 | machine->current_tid = NULL; |
63 | ||
69d2591a ACM |
64 | return 0; |
65 | } | |
66 | ||
8fb598e5 DA |
67 | struct machine *machine__new_host(void) |
68 | { | |
69 | struct machine *machine = malloc(sizeof(*machine)); | |
70 | ||
71 | if (machine != NULL) { | |
72 | machine__init(machine, "", HOST_KERNEL_ID); | |
73 | ||
74 | if (machine__create_kernel_maps(machine) < 0) | |
75 | goto out_delete; | |
76 | } | |
77 | ||
78 | return machine; | |
79 | out_delete: | |
80 | free(machine); | |
81 | return NULL; | |
82 | } | |
83 | ||
8fa7d87f | 84 | static void dsos__delete(struct dsos *dsos) |
69d2591a ACM |
85 | { |
86 | struct dso *pos, *n; | |
87 | ||
8fa7d87f | 88 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 89 | RB_CLEAR_NODE(&pos->rb_node); |
69d2591a ACM |
90 | list_del(&pos->node); |
91 | dso__delete(pos); | |
92 | } | |
93 | } | |
94 | ||
3f067dca ACM |
95 | void machine__delete_threads(struct machine *machine) |
96 | { | |
b91fc39f | 97 | struct rb_node *nd; |
3f067dca | 98 | |
b91fc39f ACM |
99 | pthread_rwlock_wrlock(&machine->threads_lock); |
100 | nd = rb_first(&machine->threads); | |
3f067dca ACM |
101 | while (nd) { |
102 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
103 | ||
3f067dca | 104 | nd = rb_next(nd); |
b91fc39f | 105 | __machine__remove_thread(machine, t, false); |
3f067dca | 106 | } |
b91fc39f | 107 | pthread_rwlock_unlock(&machine->threads_lock); |
3f067dca ACM |
108 | } |
109 | ||
69d2591a ACM |
110 | void machine__exit(struct machine *machine) |
111 | { | |
112 | map_groups__exit(&machine->kmaps); | |
3d39ac53 | 113 | dsos__delete(&machine->dsos); |
9a4388c7 | 114 | machine__exit_vdso(machine); |
04662523 | 115 | zfree(&machine->root_dir); |
b9d266ba | 116 | zfree(&machine->current_tid); |
b91fc39f | 117 | pthread_rwlock_destroy(&machine->threads_lock); |
69d2591a ACM |
118 | } |
119 | ||
120 | void machine__delete(struct machine *machine) | |
121 | { | |
122 | machine__exit(machine); | |
123 | free(machine); | |
124 | } | |
125 | ||
876650e6 ACM |
126 | void machines__init(struct machines *machines) |
127 | { | |
128 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
129 | machines->guests = RB_ROOT; | |
611a5ce8 | 130 | machines->symbol_filter = NULL; |
876650e6 ACM |
131 | } |
132 | ||
133 | void machines__exit(struct machines *machines) | |
134 | { | |
135 | machine__exit(&machines->host); | |
136 | /* XXX exit guest */ | |
137 | } | |
138 | ||
139 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
140 | const char *root_dir) |
141 | { | |
876650e6 | 142 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
143 | struct rb_node *parent = NULL; |
144 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
145 | ||
146 | if (machine == NULL) | |
147 | return NULL; | |
148 | ||
149 | if (machine__init(machine, root_dir, pid) != 0) { | |
150 | free(machine); | |
151 | return NULL; | |
152 | } | |
153 | ||
611a5ce8 AH |
154 | machine->symbol_filter = machines->symbol_filter; |
155 | ||
69d2591a ACM |
156 | while (*p != NULL) { |
157 | parent = *p; | |
158 | pos = rb_entry(parent, struct machine, rb_node); | |
159 | if (pid < pos->pid) | |
160 | p = &(*p)->rb_left; | |
161 | else | |
162 | p = &(*p)->rb_right; | |
163 | } | |
164 | ||
165 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 166 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
167 | |
168 | return machine; | |
169 | } | |
170 | ||
611a5ce8 AH |
171 | void machines__set_symbol_filter(struct machines *machines, |
172 | symbol_filter_t symbol_filter) | |
173 | { | |
174 | struct rb_node *nd; | |
175 | ||
176 | machines->symbol_filter = symbol_filter; | |
177 | machines->host.symbol_filter = symbol_filter; | |
178 | ||
179 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
180 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
181 | ||
182 | machine->symbol_filter = symbol_filter; | |
183 | } | |
184 | } | |
185 | ||
cfe1c414 AH |
186 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
187 | { | |
188 | struct rb_node *nd; | |
189 | ||
190 | machines->host.comm_exec = comm_exec; | |
191 | ||
192 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
193 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
194 | ||
195 | machine->comm_exec = comm_exec; | |
196 | } | |
197 | } | |
198 | ||
876650e6 | 199 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 200 | { |
876650e6 | 201 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
202 | struct rb_node *parent = NULL; |
203 | struct machine *machine; | |
204 | struct machine *default_machine = NULL; | |
205 | ||
876650e6 ACM |
206 | if (pid == HOST_KERNEL_ID) |
207 | return &machines->host; | |
208 | ||
69d2591a ACM |
209 | while (*p != NULL) { |
210 | parent = *p; | |
211 | machine = rb_entry(parent, struct machine, rb_node); | |
212 | if (pid < machine->pid) | |
213 | p = &(*p)->rb_left; | |
214 | else if (pid > machine->pid) | |
215 | p = &(*p)->rb_right; | |
216 | else | |
217 | return machine; | |
218 | if (!machine->pid) | |
219 | default_machine = machine; | |
220 | } | |
221 | ||
222 | return default_machine; | |
223 | } | |
224 | ||
876650e6 | 225 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
226 | { |
227 | char path[PATH_MAX]; | |
228 | const char *root_dir = ""; | |
229 | struct machine *machine = machines__find(machines, pid); | |
230 | ||
231 | if (machine && (machine->pid == pid)) | |
232 | goto out; | |
233 | ||
234 | if ((pid != HOST_KERNEL_ID) && | |
235 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
236 | (symbol_conf.guestmount)) { | |
237 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
238 | if (access(path, R_OK)) { | |
239 | static struct strlist *seen; | |
240 | ||
241 | if (!seen) | |
242 | seen = strlist__new(true, NULL); | |
243 | ||
244 | if (!strlist__has_entry(seen, path)) { | |
245 | pr_err("Can't access file %s\n", path); | |
246 | strlist__add(seen, path); | |
247 | } | |
248 | machine = NULL; | |
249 | goto out; | |
250 | } | |
251 | root_dir = path; | |
252 | } | |
253 | ||
254 | machine = machines__add(machines, pid, root_dir); | |
255 | out: | |
256 | return machine; | |
257 | } | |
258 | ||
876650e6 ACM |
259 | void machines__process_guests(struct machines *machines, |
260 | machine__process_t process, void *data) | |
69d2591a ACM |
261 | { |
262 | struct rb_node *nd; | |
263 | ||
876650e6 | 264 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
265 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
266 | process(pos, data); | |
267 | } | |
268 | } | |
269 | ||
270 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
271 | { | |
272 | if (machine__is_host(machine)) | |
273 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
274 | else if (machine__is_default_guest(machine)) | |
275 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
276 | else { | |
277 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
278 | machine->pid); | |
279 | } | |
280 | ||
281 | return bf; | |
282 | } | |
283 | ||
876650e6 | 284 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
285 | { |
286 | struct rb_node *node; | |
287 | struct machine *machine; | |
288 | ||
876650e6 ACM |
289 | machines->host.id_hdr_size = id_hdr_size; |
290 | ||
291 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
292 | machine = rb_entry(node, struct machine, rb_node); |
293 | machine->id_hdr_size = id_hdr_size; | |
294 | } | |
295 | ||
296 | return; | |
297 | } | |
298 | ||
29ce3612 AH |
299 | static void machine__update_thread_pid(struct machine *machine, |
300 | struct thread *th, pid_t pid) | |
301 | { | |
302 | struct thread *leader; | |
303 | ||
304 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
305 | return; | |
306 | ||
307 | th->pid_ = pid; | |
308 | ||
309 | if (th->pid_ == th->tid) | |
310 | return; | |
311 | ||
b91fc39f | 312 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
313 | if (!leader) |
314 | goto out_err; | |
315 | ||
316 | if (!leader->mg) | |
11246c70 | 317 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
318 | |
319 | if (!leader->mg) | |
320 | goto out_err; | |
321 | ||
322 | if (th->mg == leader->mg) | |
323 | return; | |
324 | ||
325 | if (th->mg) { | |
326 | /* | |
327 | * Maps are created from MMAP events which provide the pid and | |
328 | * tid. Consequently there never should be any maps on a thread | |
329 | * with an unknown pid. Just print an error if there are. | |
330 | */ | |
331 | if (!map_groups__empty(th->mg)) | |
332 | pr_err("Discarding thread maps for %d:%d\n", | |
333 | th->pid_, th->tid); | |
8e160b2e | 334 | map_groups__put(th->mg); |
29ce3612 AH |
335 | } |
336 | ||
337 | th->mg = map_groups__get(leader->mg); | |
338 | ||
339 | return; | |
340 | ||
341 | out_err: | |
342 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
343 | } | |
344 | ||
b91fc39f ACM |
345 | static struct thread *____machine__findnew_thread(struct machine *machine, |
346 | pid_t pid, pid_t tid, | |
347 | bool create) | |
9d2f8e22 ACM |
348 | { |
349 | struct rb_node **p = &machine->threads.rb_node; | |
350 | struct rb_node *parent = NULL; | |
351 | struct thread *th; | |
352 | ||
353 | /* | |
38051234 | 354 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
355 | * so most of the time we dont have to look up |
356 | * the full rbtree: | |
357 | */ | |
29ce3612 | 358 | th = machine->last_match; |
f3b623b8 ACM |
359 | if (th != NULL) { |
360 | if (th->tid == tid) { | |
361 | machine__update_thread_pid(machine, th, pid); | |
362 | return th; | |
363 | } | |
364 | ||
0ceb8f6e | 365 | machine->last_match = NULL; |
99d725fc | 366 | } |
9d2f8e22 ACM |
367 | |
368 | while (*p != NULL) { | |
369 | parent = *p; | |
370 | th = rb_entry(parent, struct thread, rb_node); | |
371 | ||
38051234 | 372 | if (th->tid == tid) { |
0ceb8f6e | 373 | machine->last_match = th; |
29ce3612 | 374 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
375 | return th; |
376 | } | |
377 | ||
38051234 | 378 | if (tid < th->tid) |
9d2f8e22 ACM |
379 | p = &(*p)->rb_left; |
380 | else | |
381 | p = &(*p)->rb_right; | |
382 | } | |
383 | ||
384 | if (!create) | |
385 | return NULL; | |
386 | ||
99d725fc | 387 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
388 | if (th != NULL) { |
389 | rb_link_node(&th->rb_node, parent, p); | |
390 | rb_insert_color(&th->rb_node, &machine->threads); | |
cddcef60 JO |
391 | |
392 | /* | |
393 | * We have to initialize map_groups separately | |
394 | * after rb tree is updated. | |
395 | * | |
396 | * The reason is that we call machine__findnew_thread | |
397 | * within thread__init_map_groups to find the thread | |
398 | * leader and that would screwed the rb tree. | |
399 | */ | |
418029b7 | 400 | if (thread__init_map_groups(th, machine)) { |
0170b14f | 401 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 402 | RB_CLEAR_NODE(&th->rb_node); |
418029b7 | 403 | thread__delete(th); |
cddcef60 | 404 | return NULL; |
418029b7 | 405 | } |
f3b623b8 ACM |
406 | /* |
407 | * It is now in the rbtree, get a ref | |
408 | */ | |
409 | thread__get(th); | |
0ceb8f6e | 410 | machine->last_match = th; |
9d2f8e22 ACM |
411 | } |
412 | ||
413 | return th; | |
414 | } | |
415 | ||
b91fc39f ACM |
416 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
417 | { | |
418 | return ____machine__findnew_thread(machine, pid, tid, true); | |
419 | } | |
420 | ||
314add6b AH |
421 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
422 | pid_t tid) | |
9d2f8e22 | 423 | { |
b91fc39f ACM |
424 | struct thread *th; |
425 | ||
426 | pthread_rwlock_wrlock(&machine->threads_lock); | |
427 | th = thread__get(__machine__findnew_thread(machine, pid, tid)); | |
428 | pthread_rwlock_unlock(&machine->threads_lock); | |
429 | return th; | |
9d2f8e22 ACM |
430 | } |
431 | ||
d75e6097 JO |
432 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
433 | pid_t tid) | |
9d2f8e22 | 434 | { |
b91fc39f ACM |
435 | struct thread *th; |
436 | pthread_rwlock_rdlock(&machine->threads_lock); | |
437 | th = thread__get(____machine__findnew_thread(machine, pid, tid, false)); | |
438 | pthread_rwlock_unlock(&machine->threads_lock); | |
439 | return th; | |
9d2f8e22 | 440 | } |
b0a7d1a0 | 441 | |
cfe1c414 AH |
442 | struct comm *machine__thread_exec_comm(struct machine *machine, |
443 | struct thread *thread) | |
444 | { | |
445 | if (machine->comm_exec) | |
446 | return thread__exec_comm(thread); | |
447 | else | |
448 | return thread__comm(thread); | |
449 | } | |
450 | ||
162f0bef FW |
451 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
452 | struct perf_sample *sample) | |
b0a7d1a0 | 453 | { |
314add6b AH |
454 | struct thread *thread = machine__findnew_thread(machine, |
455 | event->comm.pid, | |
456 | event->comm.tid); | |
65de51f9 | 457 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 458 | int err = 0; |
b0a7d1a0 | 459 | |
cfe1c414 AH |
460 | if (exec) |
461 | machine->comm_exec = true; | |
462 | ||
b0a7d1a0 ACM |
463 | if (dump_trace) |
464 | perf_event__fprintf_comm(event, stdout); | |
465 | ||
65de51f9 AH |
466 | if (thread == NULL || |
467 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 468 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 469 | err = -1; |
b0a7d1a0 ACM |
470 | } |
471 | ||
b91fc39f ACM |
472 | thread__put(thread); |
473 | ||
474 | return err; | |
b0a7d1a0 ACM |
475 | } |
476 | ||
477 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 478 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
479 | { |
480 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
481 | event->lost.id, event->lost.lost); | |
482 | return 0; | |
483 | } | |
484 | ||
c4937a91 KL |
485 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
486 | union perf_event *event, struct perf_sample *sample) | |
487 | { | |
488 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n", | |
489 | sample->id, event->lost_samples.lost); | |
490 | return 0; | |
491 | } | |
492 | ||
ca33380a JO |
493 | static struct dso* |
494 | machine__module_dso(struct machine *machine, struct kmod_path *m, | |
495 | const char *filename) | |
da17ea33 JO |
496 | { |
497 | struct dso *dso; | |
da17ea33 | 498 | |
3d39ac53 | 499 | dso = dsos__find(&machine->dsos, m->name, true); |
da17ea33 | 500 | if (!dso) { |
3d39ac53 | 501 | dso = dsos__addnew(&machine->dsos, m->name); |
da17ea33 JO |
502 | if (dso == NULL) |
503 | return NULL; | |
504 | ||
505 | if (machine__is_host(machine)) | |
506 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
507 | else | |
508 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
509 | ||
510 | /* _KMODULE_COMP should be next to _KMODULE */ | |
ca33380a | 511 | if (m->kmod && m->comp) |
da17ea33 | 512 | dso->symtab_type++; |
ca33380a JO |
513 | |
514 | dso__set_short_name(dso, strdup(m->name), true); | |
515 | dso__set_long_name(dso, strdup(filename), true); | |
da17ea33 JO |
516 | } |
517 | ||
518 | return dso; | |
519 | } | |
520 | ||
4a96f7a0 AH |
521 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
522 | union perf_event *event) | |
523 | { | |
524 | if (dump_trace) | |
525 | perf_event__fprintf_aux(event, stdout); | |
526 | return 0; | |
527 | } | |
528 | ||
0ad21f68 AH |
529 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
530 | union perf_event *event) | |
531 | { | |
532 | if (dump_trace) | |
533 | perf_event__fprintf_itrace_start(event, stdout); | |
534 | return 0; | |
535 | } | |
536 | ||
3f067dca ACM |
537 | struct map *machine__new_module(struct machine *machine, u64 start, |
538 | const char *filename) | |
539 | { | |
ca33380a JO |
540 | struct map *map = NULL; |
541 | struct dso *dso; | |
542 | struct kmod_path m; | |
3f067dca | 543 | |
ca33380a | 544 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
545 | return NULL; |
546 | ||
bc84f464 JO |
547 | map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, |
548 | m.name); | |
549 | if (map) | |
550 | goto out; | |
551 | ||
ca33380a JO |
552 | dso = machine__module_dso(machine, &m, filename); |
553 | if (dso == NULL) | |
554 | goto out; | |
555 | ||
3f067dca ACM |
556 | map = map__new2(start, dso, MAP__FUNCTION); |
557 | if (map == NULL) | |
ca33380a | 558 | goto out; |
3f067dca | 559 | |
3f067dca | 560 | map_groups__insert(&machine->kmaps, map); |
ca33380a JO |
561 | |
562 | out: | |
563 | free(m.name); | |
3f067dca ACM |
564 | return map; |
565 | } | |
566 | ||
876650e6 | 567 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
568 | { |
569 | struct rb_node *nd; | |
3d39ac53 | 570 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 571 | |
876650e6 | 572 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 573 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 574 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
575 | } |
576 | ||
577 | return ret; | |
578 | } | |
579 | ||
8fa7d87f | 580 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
581 | bool (skip)(struct dso *dso, int parm), int parm) |
582 | { | |
3d39ac53 | 583 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
584 | } |
585 | ||
876650e6 | 586 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
587 | bool (skip)(struct dso *dso, int parm), int parm) |
588 | { | |
589 | struct rb_node *nd; | |
876650e6 | 590 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 591 | |
876650e6 | 592 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
593 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
594 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
595 | } | |
596 | return ret; | |
597 | } | |
598 | ||
599 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
600 | { | |
601 | int i; | |
602 | size_t printed = 0; | |
603 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
604 | ||
605 | if (kdso->has_build_id) { | |
606 | char filename[PATH_MAX]; | |
607 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
608 | printed += fprintf(fp, "[0] %s\n", filename); | |
609 | } | |
610 | ||
611 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
612 | printed += fprintf(fp, "[%d] %s\n", | |
613 | i + kdso->has_build_id, vmlinux_path[i]); | |
614 | ||
615 | return printed; | |
616 | } | |
617 | ||
618 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
619 | { | |
620 | size_t ret = 0; | |
621 | struct rb_node *nd; | |
622 | ||
b91fc39f ACM |
623 | pthread_rwlock_rdlock(&machine->threads_lock); |
624 | ||
3f067dca ACM |
625 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { |
626 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
627 | ||
628 | ret += thread__fprintf(pos, fp); | |
629 | } | |
630 | ||
b91fc39f ACM |
631 | pthread_rwlock_unlock(&machine->threads_lock); |
632 | ||
3f067dca ACM |
633 | return ret; |
634 | } | |
635 | ||
636 | static struct dso *machine__get_kernel(struct machine *machine) | |
637 | { | |
638 | const char *vmlinux_name = NULL; | |
639 | struct dso *kernel; | |
640 | ||
641 | if (machine__is_host(machine)) { | |
642 | vmlinux_name = symbol_conf.vmlinux_name; | |
643 | if (!vmlinux_name) | |
644 | vmlinux_name = "[kernel.kallsyms]"; | |
645 | ||
459ce518 ACM |
646 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
647 | "[kernel]", DSO_TYPE_KERNEL); | |
3f067dca ACM |
648 | } else { |
649 | char bf[PATH_MAX]; | |
650 | ||
651 | if (machine__is_default_guest(machine)) | |
652 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
653 | if (!vmlinux_name) | |
654 | vmlinux_name = machine__mmap_name(machine, bf, | |
655 | sizeof(bf)); | |
656 | ||
459ce518 ACM |
657 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
658 | "[guest.kernel]", | |
659 | DSO_TYPE_GUEST_KERNEL); | |
3f067dca ACM |
660 | } |
661 | ||
662 | if (kernel != NULL && (!kernel->has_build_id)) | |
663 | dso__read_running_kernel_build_id(kernel, machine); | |
664 | ||
665 | return kernel; | |
666 | } | |
667 | ||
668 | struct process_args { | |
669 | u64 start; | |
670 | }; | |
671 | ||
15a0a870 AH |
672 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
673 | size_t bufsz) | |
674 | { | |
675 | if (machine__is_default_guest(machine)) | |
676 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
677 | else | |
678 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
679 | } | |
680 | ||
a93f0e55 SQ |
681 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
682 | ||
683 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
684 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
685 | * symbol_name if it's not that important. | |
686 | */ | |
4b99375b AH |
687 | static u64 machine__get_running_kernel_start(struct machine *machine, |
688 | const char **symbol_name) | |
3f067dca | 689 | { |
15a0a870 | 690 | char filename[PATH_MAX]; |
a93f0e55 SQ |
691 | int i; |
692 | const char *name; | |
693 | u64 addr = 0; | |
3f067dca | 694 | |
15a0a870 | 695 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
696 | |
697 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
698 | return 0; | |
699 | ||
a93f0e55 SQ |
700 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
701 | addr = kallsyms__get_function_start(filename, name); | |
702 | if (addr) | |
703 | break; | |
704 | } | |
705 | ||
706 | if (symbol_name) | |
707 | *symbol_name = name; | |
3f067dca | 708 | |
a93f0e55 | 709 | return addr; |
3f067dca ACM |
710 | } |
711 | ||
712 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
713 | { | |
714 | enum map_type type; | |
4b99375b | 715 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
716 | |
717 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
718 | struct kmap *kmap; | |
719 | ||
720 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
721 | if (machine->vmlinux_maps[type] == NULL) | |
722 | return -1; | |
723 | ||
724 | machine->vmlinux_maps[type]->map_ip = | |
725 | machine->vmlinux_maps[type]->unmap_ip = | |
726 | identity__map_ip; | |
727 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
ba92732e WN |
728 | if (!kmap) |
729 | return -1; | |
730 | ||
3f067dca ACM |
731 | kmap->kmaps = &machine->kmaps; |
732 | map_groups__insert(&machine->kmaps, | |
733 | machine->vmlinux_maps[type]); | |
734 | } | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | void machine__destroy_kernel_maps(struct machine *machine) | |
740 | { | |
741 | enum map_type type; | |
742 | ||
743 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
744 | struct kmap *kmap; | |
745 | ||
746 | if (machine->vmlinux_maps[type] == NULL) | |
747 | continue; | |
748 | ||
749 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
750 | map_groups__remove(&machine->kmaps, | |
751 | machine->vmlinux_maps[type]); | |
ba92732e | 752 | if (kmap && kmap->ref_reloc_sym) { |
3f067dca ACM |
753 | /* |
754 | * ref_reloc_sym is shared among all maps, so free just | |
755 | * on one of them. | |
756 | */ | |
757 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
758 | zfree((char **)&kmap->ref_reloc_sym->name); |
759 | zfree(&kmap->ref_reloc_sym); | |
760 | } else | |
761 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
762 | } |
763 | ||
3f067dca ACM |
764 | machine->vmlinux_maps[type] = NULL; |
765 | } | |
766 | } | |
767 | ||
876650e6 | 768 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
769 | { |
770 | int ret = 0; | |
771 | struct dirent **namelist = NULL; | |
772 | int i, items = 0; | |
773 | char path[PATH_MAX]; | |
774 | pid_t pid; | |
775 | char *endp; | |
776 | ||
777 | if (symbol_conf.default_guest_vmlinux_name || | |
778 | symbol_conf.default_guest_modules || | |
779 | symbol_conf.default_guest_kallsyms) { | |
780 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
781 | } | |
782 | ||
783 | if (symbol_conf.guestmount) { | |
784 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
785 | if (items <= 0) | |
786 | return -ENOENT; | |
787 | for (i = 0; i < items; i++) { | |
788 | if (!isdigit(namelist[i]->d_name[0])) { | |
789 | /* Filter out . and .. */ | |
790 | continue; | |
791 | } | |
792 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
793 | if ((*endp != '\0') || | |
794 | (endp == namelist[i]->d_name) || | |
795 | (errno == ERANGE)) { | |
796 | pr_debug("invalid directory (%s). Skipping.\n", | |
797 | namelist[i]->d_name); | |
798 | continue; | |
799 | } | |
800 | sprintf(path, "%s/%s/proc/kallsyms", | |
801 | symbol_conf.guestmount, | |
802 | namelist[i]->d_name); | |
803 | ret = access(path, R_OK); | |
804 | if (ret) { | |
805 | pr_debug("Can't access file %s\n", path); | |
806 | goto failure; | |
807 | } | |
808 | machines__create_kernel_maps(machines, pid); | |
809 | } | |
810 | failure: | |
811 | free(namelist); | |
812 | } | |
813 | ||
814 | return ret; | |
815 | } | |
816 | ||
876650e6 | 817 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 818 | { |
876650e6 ACM |
819 | struct rb_node *next = rb_first(&machines->guests); |
820 | ||
821 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
822 | |
823 | while (next) { | |
824 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
825 | ||
826 | next = rb_next(&pos->rb_node); | |
876650e6 | 827 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
828 | machine__delete(pos); |
829 | } | |
830 | } | |
831 | ||
876650e6 | 832 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
833 | { |
834 | struct machine *machine = machines__findnew(machines, pid); | |
835 | ||
836 | if (machine == NULL) | |
837 | return -1; | |
838 | ||
839 | return machine__create_kernel_maps(machine); | |
840 | } | |
841 | ||
842 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
843 | enum map_type type, symbol_filter_t filter) | |
844 | { | |
845 | struct map *map = machine->vmlinux_maps[type]; | |
846 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
847 | ||
848 | if (ret > 0) { | |
849 | dso__set_loaded(map->dso, type); | |
850 | /* | |
851 | * Since /proc/kallsyms will have multiple sessions for the | |
852 | * kernel, with modules between them, fixup the end of all | |
853 | * sections. | |
854 | */ | |
855 | __map_groups__fixup_end(&machine->kmaps, type); | |
856 | } | |
857 | ||
858 | return ret; | |
859 | } | |
860 | ||
861 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
862 | symbol_filter_t filter) | |
863 | { | |
864 | struct map *map = machine->vmlinux_maps[type]; | |
865 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
866 | ||
39b12f78 | 867 | if (ret > 0) |
3f067dca | 868 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
869 | |
870 | return ret; | |
871 | } | |
872 | ||
873 | static void map_groups__fixup_end(struct map_groups *mg) | |
874 | { | |
875 | int i; | |
876 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
877 | __map_groups__fixup_end(mg, i); | |
878 | } | |
879 | ||
880 | static char *get_kernel_version(const char *root_dir) | |
881 | { | |
882 | char version[PATH_MAX]; | |
883 | FILE *file; | |
884 | char *name, *tmp; | |
885 | const char *prefix = "Linux version "; | |
886 | ||
887 | sprintf(version, "%s/proc/version", root_dir); | |
888 | file = fopen(version, "r"); | |
889 | if (!file) | |
890 | return NULL; | |
891 | ||
892 | version[0] = '\0'; | |
893 | tmp = fgets(version, sizeof(version), file); | |
894 | fclose(file); | |
895 | ||
896 | name = strstr(version, prefix); | |
897 | if (!name) | |
898 | return NULL; | |
899 | name += strlen(prefix); | |
900 | tmp = strchr(name, ' '); | |
901 | if (tmp) | |
902 | *tmp = '\0'; | |
903 | ||
904 | return strdup(name); | |
905 | } | |
906 | ||
bb58a8a4 JO |
907 | static bool is_kmod_dso(struct dso *dso) |
908 | { | |
909 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
910 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
911 | } | |
912 | ||
913 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
914 | struct kmod_path *m) | |
915 | { | |
916 | struct map *map; | |
917 | char *long_name; | |
918 | ||
919 | map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name); | |
920 | if (map == NULL) | |
921 | return 0; | |
922 | ||
923 | long_name = strdup(path); | |
924 | if (long_name == NULL) | |
925 | return -ENOMEM; | |
926 | ||
927 | dso__set_long_name(map->dso, long_name, true); | |
928 | dso__kernel_module_get_build_id(map->dso, ""); | |
929 | ||
930 | /* | |
931 | * Full name could reveal us kmod compression, so | |
932 | * we need to update the symtab_type if needed. | |
933 | */ | |
934 | if (m->comp && is_kmod_dso(map->dso)) | |
935 | map->dso->symtab_type++; | |
936 | ||
937 | return 0; | |
938 | } | |
939 | ||
3f067dca | 940 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 941 | const char *dir_name, int depth) |
3f067dca ACM |
942 | { |
943 | struct dirent *dent; | |
944 | DIR *dir = opendir(dir_name); | |
945 | int ret = 0; | |
946 | ||
947 | if (!dir) { | |
948 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
949 | return -1; | |
950 | } | |
951 | ||
952 | while ((dent = readdir(dir)) != NULL) { | |
953 | char path[PATH_MAX]; | |
954 | struct stat st; | |
955 | ||
956 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
957 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
958 | if (stat(path, &st)) | |
959 | continue; | |
960 | ||
961 | if (S_ISDIR(st.st_mode)) { | |
962 | if (!strcmp(dent->d_name, ".") || | |
963 | !strcmp(dent->d_name, "..")) | |
964 | continue; | |
965 | ||
61d4290c RY |
966 | /* Do not follow top-level source and build symlinks */ |
967 | if (depth == 0) { | |
968 | if (!strcmp(dent->d_name, "source") || | |
969 | !strcmp(dent->d_name, "build")) | |
970 | continue; | |
971 | } | |
972 | ||
973 | ret = map_groups__set_modules_path_dir(mg, path, | |
974 | depth + 1); | |
3f067dca ACM |
975 | if (ret < 0) |
976 | goto out; | |
977 | } else { | |
bb58a8a4 | 978 | struct kmod_path m; |
3f067dca | 979 | |
bb58a8a4 JO |
980 | ret = kmod_path__parse_name(&m, dent->d_name); |
981 | if (ret) | |
982 | goto out; | |
c00c48fc | 983 | |
bb58a8a4 JO |
984 | if (m.kmod) |
985 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 986 | |
bb58a8a4 | 987 | free(m.name); |
3f067dca | 988 | |
bb58a8a4 | 989 | if (ret) |
3f067dca | 990 | goto out; |
3f067dca ACM |
991 | } |
992 | } | |
993 | ||
994 | out: | |
995 | closedir(dir); | |
996 | return ret; | |
997 | } | |
998 | ||
999 | static int machine__set_modules_path(struct machine *machine) | |
1000 | { | |
1001 | char *version; | |
1002 | char modules_path[PATH_MAX]; | |
1003 | ||
1004 | version = get_kernel_version(machine->root_dir); | |
1005 | if (!version) | |
1006 | return -1; | |
1007 | ||
61d4290c | 1008 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1009 | machine->root_dir, version); |
1010 | free(version); | |
1011 | ||
61d4290c | 1012 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
1013 | } |
1014 | ||
316d70d6 | 1015 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 1016 | { |
316d70d6 | 1017 | struct machine *machine = arg; |
3f067dca | 1018 | struct map *map; |
316d70d6 AH |
1019 | |
1020 | map = machine__new_module(machine, start, name); | |
1021 | if (map == NULL) | |
1022 | return -1; | |
1023 | ||
1024 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static int machine__create_modules(struct machine *machine) | |
1030 | { | |
3f067dca ACM |
1031 | const char *modules; |
1032 | char path[PATH_MAX]; | |
1033 | ||
f4be904d | 1034 | if (machine__is_default_guest(machine)) { |
3f067dca | 1035 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1036 | } else { |
1037 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1038 | modules = path; |
1039 | } | |
1040 | ||
aa7fe3b0 | 1041 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1042 | return -1; |
1043 | ||
316d70d6 | 1044 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1045 | return -1; |
1046 | ||
316d70d6 AH |
1047 | if (!machine__set_modules_path(machine)) |
1048 | return 0; | |
3f067dca | 1049 | |
316d70d6 | 1050 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1051 | |
8f76fcd9 | 1052 | return 0; |
3f067dca ACM |
1053 | } |
1054 | ||
1055 | int machine__create_kernel_maps(struct machine *machine) | |
1056 | { | |
1057 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 1058 | const char *name; |
4b99375b | 1059 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
1060 | if (!addr) |
1061 | return -1; | |
3f067dca ACM |
1062 | |
1063 | if (kernel == NULL || | |
1064 | __machine__create_kernel_maps(machine, kernel) < 0) | |
1065 | return -1; | |
1066 | ||
1067 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1068 | if (machine__is_host(machine)) | |
1069 | pr_debug("Problems creating module maps, " | |
1070 | "continuing anyway...\n"); | |
1071 | else | |
1072 | pr_debug("Problems creating module maps for guest %d, " | |
1073 | "continuing anyway...\n", machine->pid); | |
1074 | } | |
1075 | ||
1076 | /* | |
1077 | * Now that we have all the maps created, just set the ->end of them: | |
1078 | */ | |
1079 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
1080 | |
1081 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
1082 | addr)) { | |
1083 | machine__destroy_kernel_maps(machine); | |
1084 | return -1; | |
1085 | } | |
1086 | ||
3f067dca ACM |
1087 | return 0; |
1088 | } | |
1089 | ||
b0a7d1a0 ACM |
1090 | static void machine__set_kernel_mmap_len(struct machine *machine, |
1091 | union perf_event *event) | |
1092 | { | |
4552cf0f NK |
1093 | int i; |
1094 | ||
1095 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1096 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1097 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1098 | event->mmap.len); | |
1099 | /* | |
1100 | * Be a bit paranoid here, some perf.data file came with | |
1101 | * a zero sized synthesized MMAP event for the kernel. | |
1102 | */ | |
1103 | if (machine->vmlinux_maps[i]->end == 0) | |
1104 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1105 | } | |
b0a7d1a0 ACM |
1106 | } |
1107 | ||
8e0cf965 AH |
1108 | static bool machine__uses_kcore(struct machine *machine) |
1109 | { | |
1110 | struct dso *dso; | |
1111 | ||
3d39ac53 | 1112 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1113 | if (dso__is_kcore(dso)) |
1114 | return true; | |
1115 | } | |
1116 | ||
1117 | return false; | |
1118 | } | |
1119 | ||
b0a7d1a0 ACM |
1120 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1121 | union perf_event *event) | |
1122 | { | |
1123 | struct map *map; | |
1124 | char kmmap_prefix[PATH_MAX]; | |
1125 | enum dso_kernel_type kernel_type; | |
1126 | bool is_kernel_mmap; | |
1127 | ||
8e0cf965 AH |
1128 | /* If we have maps from kcore then we do not need or want any others */ |
1129 | if (machine__uses_kcore(machine)) | |
1130 | return 0; | |
1131 | ||
b0a7d1a0 ACM |
1132 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1133 | if (machine__is_host(machine)) | |
1134 | kernel_type = DSO_TYPE_KERNEL; | |
1135 | else | |
1136 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1137 | ||
1138 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1139 | kmmap_prefix, | |
1140 | strlen(kmmap_prefix) - 1) == 0; | |
1141 | if (event->mmap.filename[0] == '/' || | |
1142 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
b0a7d1a0 ACM |
1143 | map = machine__new_module(machine, event->mmap.start, |
1144 | event->mmap.filename); | |
1145 | if (map == NULL) | |
1146 | goto out_problem; | |
1147 | ||
b0a7d1a0 ACM |
1148 | map->end = map->start + event->mmap.len; |
1149 | } else if (is_kernel_mmap) { | |
1150 | const char *symbol_name = (event->mmap.filename + | |
1151 | strlen(kmmap_prefix)); | |
1152 | /* | |
1153 | * Should be there already, from the build-id table in | |
1154 | * the header. | |
1155 | */ | |
b837a8bd NK |
1156 | struct dso *kernel = NULL; |
1157 | struct dso *dso; | |
1158 | ||
3d39ac53 | 1159 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1160 | |
1161 | /* | |
1162 | * The cpumode passed to is_kernel_module is not the | |
1163 | * cpumode of *this* event. If we insist on passing | |
1164 | * correct cpumode to is_kernel_module, we should | |
1165 | * record the cpumode when we adding this dso to the | |
1166 | * linked list. | |
1167 | * | |
1168 | * However we don't really need passing correct | |
1169 | * cpumode. We know the correct cpumode must be kernel | |
1170 | * mode (if not, we should not link it onto kernel_dsos | |
1171 | * list). | |
1172 | * | |
1173 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1174 | * is_kernel_module() treats it as a kernel cpumode. | |
1175 | */ | |
1176 | ||
1177 | if (!dso->kernel || | |
1178 | is_kernel_module(dso->long_name, | |
1179 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1180 | continue; |
1181 | ||
1f121b03 | 1182 | |
b837a8bd NK |
1183 | kernel = dso; |
1184 | break; | |
1185 | } | |
1186 | ||
1187 | if (kernel == NULL) | |
aa7cc2ae | 1188 | kernel = machine__findnew_dso(machine, kmmap_prefix); |
b0a7d1a0 ACM |
1189 | if (kernel == NULL) |
1190 | goto out_problem; | |
1191 | ||
1192 | kernel->kernel = kernel_type; | |
1193 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1194 | goto out_problem; | |
1195 | ||
330dfa22 NK |
1196 | if (strstr(kernel->long_name, "vmlinux")) |
1197 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1198 | |
b0a7d1a0 ACM |
1199 | machine__set_kernel_mmap_len(machine, event); |
1200 | ||
1201 | /* | |
1202 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1203 | * symbol. Effectively having zero here means that at record | |
1204 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1205 | */ | |
1206 | if (event->mmap.pgoff != 0) { | |
1207 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1208 | symbol_name, | |
1209 | event->mmap.pgoff); | |
1210 | } | |
1211 | ||
1212 | if (machine__is_default_guest(machine)) { | |
1213 | /* | |
1214 | * preload dso of guest kernel and modules | |
1215 | */ | |
1216 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1217 | NULL); | |
1218 | } | |
1219 | } | |
1220 | return 0; | |
1221 | out_problem: | |
1222 | return -1; | |
1223 | } | |
1224 | ||
5c5e854b | 1225 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1226 | union perf_event *event, |
1227 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1228 | { |
1229 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1230 | struct thread *thread; | |
1231 | struct map *map; | |
1232 | enum map_type type; | |
1233 | int ret = 0; | |
1234 | ||
1235 | if (dump_trace) | |
1236 | perf_event__fprintf_mmap2(event, stdout); | |
1237 | ||
1238 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1239 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1240 | ret = machine__process_kernel_mmap_event(machine, event); | |
1241 | if (ret < 0) | |
1242 | goto out_problem; | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1247 | event->mmap2.tid); |
5c5e854b SE |
1248 | if (thread == NULL) |
1249 | goto out_problem; | |
1250 | ||
1251 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1252 | type = MAP__VARIABLE; | |
1253 | else | |
1254 | type = MAP__FUNCTION; | |
1255 | ||
2a03068c | 1256 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1257 | event->mmap2.len, event->mmap2.pgoff, |
1258 | event->mmap2.pid, event->mmap2.maj, | |
1259 | event->mmap2.min, event->mmap2.ino, | |
1260 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1261 | event->mmap2.prot, |
1262 | event->mmap2.flags, | |
5835edda | 1263 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1264 | |
1265 | if (map == NULL) | |
b91fc39f | 1266 | goto out_problem_map; |
5c5e854b SE |
1267 | |
1268 | thread__insert_map(thread, map); | |
b91fc39f | 1269 | thread__put(thread); |
84c2cafa | 1270 | map__put(map); |
5c5e854b SE |
1271 | return 0; |
1272 | ||
b91fc39f ACM |
1273 | out_problem_map: |
1274 | thread__put(thread); | |
5c5e854b SE |
1275 | out_problem: |
1276 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1277 | return 0; | |
1278 | } | |
1279 | ||
162f0bef FW |
1280 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1281 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1282 | { |
1283 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1284 | struct thread *thread; | |
1285 | struct map *map; | |
bad40917 | 1286 | enum map_type type; |
b0a7d1a0 ACM |
1287 | int ret = 0; |
1288 | ||
1289 | if (dump_trace) | |
1290 | perf_event__fprintf_mmap(event, stdout); | |
1291 | ||
1292 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1293 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1294 | ret = machine__process_kernel_mmap_event(machine, event); | |
1295 | if (ret < 0) | |
1296 | goto out_problem; | |
1297 | return 0; | |
1298 | } | |
1299 | ||
314add6b | 1300 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1301 | event->mmap.tid); |
b0a7d1a0 ACM |
1302 | if (thread == NULL) |
1303 | goto out_problem; | |
bad40917 SE |
1304 | |
1305 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1306 | type = MAP__VARIABLE; | |
1307 | else | |
1308 | type = MAP__FUNCTION; | |
1309 | ||
2a03068c | 1310 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1311 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1312 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1313 | event->mmap.filename, |
5835edda | 1314 | type, thread); |
bad40917 | 1315 | |
b0a7d1a0 | 1316 | if (map == NULL) |
b91fc39f | 1317 | goto out_problem_map; |
b0a7d1a0 ACM |
1318 | |
1319 | thread__insert_map(thread, map); | |
b91fc39f | 1320 | thread__put(thread); |
84c2cafa | 1321 | map__put(map); |
b0a7d1a0 ACM |
1322 | return 0; |
1323 | ||
b91fc39f ACM |
1324 | out_problem_map: |
1325 | thread__put(thread); | |
b0a7d1a0 ACM |
1326 | out_problem: |
1327 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1328 | return 0; | |
1329 | } | |
1330 | ||
b91fc39f | 1331 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1332 | { |
f3b623b8 | 1333 | if (machine->last_match == th) |
0ceb8f6e | 1334 | machine->last_match = NULL; |
f3b623b8 | 1335 | |
59a51c1d | 1336 | BUG_ON(atomic_read(&th->refcnt) == 0); |
b91fc39f ACM |
1337 | if (lock) |
1338 | pthread_rwlock_wrlock(&machine->threads_lock); | |
0170b14f | 1339 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 1340 | RB_CLEAR_NODE(&th->rb_node); |
236a3bbd | 1341 | /* |
f3b623b8 ACM |
1342 | * Move it first to the dead_threads list, then drop the reference, |
1343 | * if this is the last reference, then the thread__delete destructor | |
1344 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd DA |
1345 | */ |
1346 | list_add_tail(&th->node, &machine->dead_threads); | |
b91fc39f ACM |
1347 | if (lock) |
1348 | pthread_rwlock_unlock(&machine->threads_lock); | |
f3b623b8 | 1349 | thread__put(th); |
236a3bbd DA |
1350 | } |
1351 | ||
b91fc39f ACM |
1352 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1353 | { | |
1354 | return __machine__remove_thread(machine, th, true); | |
1355 | } | |
1356 | ||
162f0bef FW |
1357 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1358 | struct perf_sample *sample) | |
b0a7d1a0 | 1359 | { |
d75e6097 JO |
1360 | struct thread *thread = machine__find_thread(machine, |
1361 | event->fork.pid, | |
1362 | event->fork.tid); | |
314add6b AH |
1363 | struct thread *parent = machine__findnew_thread(machine, |
1364 | event->fork.ppid, | |
1365 | event->fork.ptid); | |
b91fc39f | 1366 | int err = 0; |
b0a7d1a0 | 1367 | |
236a3bbd | 1368 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1369 | if (thread != NULL) { |
236a3bbd | 1370 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1371 | thread__put(thread); |
1372 | } | |
236a3bbd | 1373 | |
314add6b AH |
1374 | thread = machine__findnew_thread(machine, event->fork.pid, |
1375 | event->fork.tid); | |
b0a7d1a0 ACM |
1376 | if (dump_trace) |
1377 | perf_event__fprintf_task(event, stdout); | |
1378 | ||
1379 | if (thread == NULL || parent == NULL || | |
162f0bef | 1380 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 | 1381 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1382 | err = -1; |
b0a7d1a0 | 1383 | } |
b91fc39f ACM |
1384 | thread__put(thread); |
1385 | thread__put(parent); | |
b0a7d1a0 | 1386 | |
b91fc39f | 1387 | return err; |
b0a7d1a0 ACM |
1388 | } |
1389 | ||
162f0bef FW |
1390 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1391 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1392 | { |
d75e6097 JO |
1393 | struct thread *thread = machine__find_thread(machine, |
1394 | event->fork.pid, | |
1395 | event->fork.tid); | |
b0a7d1a0 ACM |
1396 | |
1397 | if (dump_trace) | |
1398 | perf_event__fprintf_task(event, stdout); | |
1399 | ||
b91fc39f | 1400 | if (thread != NULL) { |
236a3bbd | 1401 | thread__exited(thread); |
b91fc39f ACM |
1402 | thread__put(thread); |
1403 | } | |
b0a7d1a0 ACM |
1404 | |
1405 | return 0; | |
1406 | } | |
1407 | ||
162f0bef FW |
1408 | int machine__process_event(struct machine *machine, union perf_event *event, |
1409 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1410 | { |
1411 | int ret; | |
1412 | ||
1413 | switch (event->header.type) { | |
1414 | case PERF_RECORD_COMM: | |
162f0bef | 1415 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1416 | case PERF_RECORD_MMAP: |
162f0bef | 1417 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1418 | case PERF_RECORD_MMAP2: |
162f0bef | 1419 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1420 | case PERF_RECORD_FORK: |
162f0bef | 1421 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1422 | case PERF_RECORD_EXIT: |
162f0bef | 1423 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1424 | case PERF_RECORD_LOST: |
162f0bef | 1425 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
1426 | case PERF_RECORD_AUX: |
1427 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 AH |
1428 | case PERF_RECORD_ITRACE_START: |
1429 | ret = machine__process_itrace_start_event(machine, event); | |
c4937a91 KL |
1430 | case PERF_RECORD_LOST_SAMPLES: |
1431 | ret = machine__process_lost_samples_event(machine, event, sample); break; | |
0ad21f68 | 1432 | break; |
b0a7d1a0 ACM |
1433 | default: |
1434 | ret = -1; | |
1435 | break; | |
1436 | } | |
1437 | ||
1438 | return ret; | |
1439 | } | |
3f067dca | 1440 | |
b21484f1 | 1441 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1442 | { |
b21484f1 | 1443 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1444 | return 1; |
3f067dca ACM |
1445 | return 0; |
1446 | } | |
1447 | ||
bb871a9c | 1448 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1449 | struct addr_map_symbol *ams, |
1450 | u64 ip) | |
1451 | { | |
1452 | struct addr_location al; | |
3f067dca ACM |
1453 | |
1454 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1455 | /* |
1456 | * We cannot use the header.misc hint to determine whether a | |
1457 | * branch stack address is user, kernel, guest, hypervisor. | |
1458 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1459 | * Thus, we have to try consecutively until we find a match | |
1460 | * or else, the symbol is unknown | |
1461 | */ | |
bb871a9c | 1462 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1463 | |
3f067dca ACM |
1464 | ams->addr = ip; |
1465 | ams->al_addr = al.addr; | |
1466 | ams->sym = al.sym; | |
1467 | ams->map = al.map; | |
1468 | } | |
1469 | ||
bb871a9c | 1470 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1471 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1472 | { | |
1473 | struct addr_location al; | |
1474 | ||
1475 | memset(&al, 0, sizeof(al)); | |
1476 | ||
bb871a9c | 1477 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1478 | if (al.map == NULL) { |
1479 | /* | |
1480 | * some shared data regions have execute bit set which puts | |
1481 | * their mapping in the MAP__FUNCTION type array. | |
1482 | * Check there as a fallback option before dropping the sample. | |
1483 | */ | |
bb871a9c | 1484 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1485 | } |
1486 | ||
98a3b32c SE |
1487 | ams->addr = addr; |
1488 | ams->al_addr = al.addr; | |
1489 | ams->sym = al.sym; | |
1490 | ams->map = al.map; | |
1491 | } | |
1492 | ||
e80faac0 ACM |
1493 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1494 | struct addr_location *al) | |
98a3b32c SE |
1495 | { |
1496 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1497 | ||
1498 | if (!mi) | |
1499 | return NULL; | |
1500 | ||
bb871a9c ACM |
1501 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1502 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1503 | mi->data_src.val = sample->data_src; |
1504 | ||
1505 | return mi; | |
1506 | } | |
1507 | ||
37592b8a AK |
1508 | static int add_callchain_ip(struct thread *thread, |
1509 | struct symbol **parent, | |
1510 | struct addr_location *root_al, | |
73dbcd65 | 1511 | u8 *cpumode, |
37592b8a AK |
1512 | u64 ip) |
1513 | { | |
1514 | struct addr_location al; | |
1515 | ||
1516 | al.filtered = 0; | |
1517 | al.sym = NULL; | |
73dbcd65 | 1518 | if (!cpumode) { |
8b7bad58 AK |
1519 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, |
1520 | ip, &al); | |
73dbcd65 | 1521 | } else { |
2e77784b KL |
1522 | if (ip >= PERF_CONTEXT_MAX) { |
1523 | switch (ip) { | |
1524 | case PERF_CONTEXT_HV: | |
73dbcd65 | 1525 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
1526 | break; |
1527 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 1528 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
1529 | break; |
1530 | case PERF_CONTEXT_USER: | |
73dbcd65 | 1531 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
1532 | break; |
1533 | default: | |
1534 | pr_debug("invalid callchain context: " | |
1535 | "%"PRId64"\n", (s64) ip); | |
1536 | /* | |
1537 | * It seems the callchain is corrupted. | |
1538 | * Discard all. | |
1539 | */ | |
1540 | callchain_cursor_reset(&callchain_cursor); | |
1541 | return 1; | |
1542 | } | |
1543 | return 0; | |
1544 | } | |
73dbcd65 DH |
1545 | thread__find_addr_location(thread, *cpumode, MAP__FUNCTION, |
1546 | ip, &al); | |
2e77784b KL |
1547 | } |
1548 | ||
37592b8a AK |
1549 | if (al.sym != NULL) { |
1550 | if (sort__has_parent && !*parent && | |
1551 | symbol__match_regex(al.sym, &parent_regex)) | |
1552 | *parent = al.sym; | |
1553 | else if (have_ignore_callees && root_al && | |
1554 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1555 | /* Treat this symbol as the root, | |
1556 | forgetting its callees. */ | |
1557 | *root_al = al; | |
1558 | callchain_cursor_reset(&callchain_cursor); | |
1559 | } | |
1560 | } | |
1561 | ||
5550171b | 1562 | return callchain_cursor_append(&callchain_cursor, al.addr, al.map, al.sym); |
37592b8a AK |
1563 | } |
1564 | ||
644f2df2 ACM |
1565 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1566 | struct addr_location *al) | |
3f067dca | 1567 | { |
3f067dca | 1568 | unsigned int i; |
644f2df2 ACM |
1569 | const struct branch_stack *bs = sample->branch_stack; |
1570 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1571 | |
3f067dca ACM |
1572 | if (!bi) |
1573 | return NULL; | |
1574 | ||
1575 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1576 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1577 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1578 | bi[i].flags = bs->entries[i].flags; |
1579 | } | |
1580 | return bi; | |
1581 | } | |
1582 | ||
8b7bad58 AK |
1583 | #define CHASHSZ 127 |
1584 | #define CHASHBITS 7 | |
1585 | #define NO_ENTRY 0xff | |
1586 | ||
1587 | #define PERF_MAX_BRANCH_DEPTH 127 | |
1588 | ||
1589 | /* Remove loops. */ | |
1590 | static int remove_loops(struct branch_entry *l, int nr) | |
1591 | { | |
1592 | int i, j, off; | |
1593 | unsigned char chash[CHASHSZ]; | |
1594 | ||
1595 | memset(chash, NO_ENTRY, sizeof(chash)); | |
1596 | ||
1597 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
1598 | ||
1599 | for (i = 0; i < nr; i++) { | |
1600 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
1601 | ||
1602 | /* no collision handling for now */ | |
1603 | if (chash[h] == NO_ENTRY) { | |
1604 | chash[h] = i; | |
1605 | } else if (l[chash[h]].from == l[i].from) { | |
1606 | bool is_loop = true; | |
1607 | /* check if it is a real loop */ | |
1608 | off = 0; | |
1609 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
1610 | if (l[j].from != l[i + off].from) { | |
1611 | is_loop = false; | |
1612 | break; | |
1613 | } | |
1614 | if (is_loop) { | |
1615 | memmove(l + i, l + i + off, | |
1616 | (nr - (i + off)) * sizeof(*l)); | |
1617 | nr -= off; | |
1618 | } | |
1619 | } | |
1620 | } | |
1621 | return nr; | |
1622 | } | |
1623 | ||
384b6055 KL |
1624 | /* |
1625 | * Recolve LBR callstack chain sample | |
1626 | * Return: | |
1627 | * 1 on success get LBR callchain information | |
1628 | * 0 no available LBR callchain information, should try fp | |
1629 | * negative error code on other errors. | |
1630 | */ | |
1631 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
1632 | struct perf_sample *sample, | |
1633 | struct symbol **parent, | |
1634 | struct addr_location *root_al, | |
1635 | int max_stack) | |
3f067dca | 1636 | { |
384b6055 KL |
1637 | struct ip_callchain *chain = sample->callchain; |
1638 | int chain_nr = min(max_stack, (int)chain->nr); | |
73dbcd65 | 1639 | u8 cpumode = PERF_RECORD_MISC_USER; |
384b6055 KL |
1640 | int i, j, err; |
1641 | u64 ip; | |
1642 | ||
1643 | for (i = 0; i < chain_nr; i++) { | |
1644 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
1645 | break; | |
1646 | } | |
1647 | ||
1648 | /* LBR only affects the user callchain */ | |
1649 | if (i != chain_nr) { | |
1650 | struct branch_stack *lbr_stack = sample->branch_stack; | |
1651 | int lbr_nr = lbr_stack->nr; | |
1652 | /* | |
1653 | * LBR callstack can only get user call chain. | |
1654 | * The mix_chain_nr is kernel call chain | |
1655 | * number plus LBR user call chain number. | |
1656 | * i is kernel call chain number, | |
1657 | * 1 is PERF_CONTEXT_USER, | |
1658 | * lbr_nr + 1 is the user call chain number. | |
1659 | * For details, please refer to the comments | |
1660 | * in callchain__printf | |
1661 | */ | |
1662 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
1663 | ||
1664 | if (mix_chain_nr > PERF_MAX_STACK_DEPTH + PERF_MAX_BRANCH_DEPTH) { | |
1665 | pr_warning("corrupted callchain. skipping...\n"); | |
1666 | return 0; | |
1667 | } | |
1668 | ||
1669 | for (j = 0; j < mix_chain_nr; j++) { | |
1670 | if (callchain_param.order == ORDER_CALLEE) { | |
1671 | if (j < i + 1) | |
1672 | ip = chain->ips[j]; | |
1673 | else if (j > i + 1) | |
1674 | ip = lbr_stack->entries[j - i - 2].from; | |
1675 | else | |
1676 | ip = lbr_stack->entries[0].to; | |
1677 | } else { | |
1678 | if (j < lbr_nr) | |
1679 | ip = lbr_stack->entries[lbr_nr - j - 1].from; | |
1680 | else if (j > lbr_nr) | |
1681 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
1682 | else | |
1683 | ip = lbr_stack->entries[0].to; | |
1684 | } | |
1685 | ||
73dbcd65 | 1686 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
384b6055 KL |
1687 | if (err) |
1688 | return (err < 0) ? err : 0; | |
1689 | } | |
1690 | return 1; | |
1691 | } | |
1692 | ||
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | static int thread__resolve_callchain_sample(struct thread *thread, | |
1697 | struct perf_evsel *evsel, | |
1698 | struct perf_sample *sample, | |
1699 | struct symbol **parent, | |
1700 | struct addr_location *root_al, | |
1701 | int max_stack) | |
1702 | { | |
1703 | struct branch_stack *branch = sample->branch_stack; | |
1704 | struct ip_callchain *chain = sample->callchain; | |
91e95617 | 1705 | int chain_nr = min(max_stack, (int)chain->nr); |
73dbcd65 | 1706 | u8 cpumode = PERF_RECORD_MISC_USER; |
2e77784b | 1707 | int i, j, err; |
8b7bad58 AK |
1708 | int skip_idx = -1; |
1709 | int first_call = 0; | |
1710 | ||
384b6055 KL |
1711 | callchain_cursor_reset(&callchain_cursor); |
1712 | ||
1713 | if (has_branch_callstack(evsel)) { | |
1714 | err = resolve_lbr_callchain_sample(thread, sample, parent, | |
1715 | root_al, max_stack); | |
1716 | if (err) | |
1717 | return (err < 0) ? err : 0; | |
1718 | } | |
1719 | ||
8b7bad58 AK |
1720 | /* |
1721 | * Based on DWARF debug information, some architectures skip | |
1722 | * a callchain entry saved by the kernel. | |
1723 | */ | |
1724 | if (chain->nr < PERF_MAX_STACK_DEPTH) | |
1725 | skip_idx = arch_skip_callchain_idx(thread, chain); | |
3f067dca | 1726 | |
8b7bad58 AK |
1727 | /* |
1728 | * Add branches to call stack for easier browsing. This gives | |
1729 | * more context for a sample than just the callers. | |
1730 | * | |
1731 | * This uses individual histograms of paths compared to the | |
1732 | * aggregated histograms the normal LBR mode uses. | |
1733 | * | |
1734 | * Limitations for now: | |
1735 | * - No extra filters | |
1736 | * - No annotations (should annotate somehow) | |
1737 | */ | |
1738 | ||
1739 | if (branch && callchain_param.branch_callstack) { | |
1740 | int nr = min(max_stack, (int)branch->nr); | |
1741 | struct branch_entry be[nr]; | |
1742 | ||
1743 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
1744 | pr_warning("corrupted branch chain. skipping...\n"); | |
1745 | goto check_calls; | |
1746 | } | |
1747 | ||
1748 | for (i = 0; i < nr; i++) { | |
1749 | if (callchain_param.order == ORDER_CALLEE) { | |
1750 | be[i] = branch->entries[i]; | |
1751 | /* | |
1752 | * Check for overlap into the callchain. | |
1753 | * The return address is one off compared to | |
1754 | * the branch entry. To adjust for this | |
1755 | * assume the calling instruction is not longer | |
1756 | * than 8 bytes. | |
1757 | */ | |
1758 | if (i == skip_idx || | |
1759 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
1760 | first_call++; | |
1761 | else if (be[i].from < chain->ips[first_call] && | |
1762 | be[i].from >= chain->ips[first_call] - 8) | |
1763 | first_call++; | |
1764 | } else | |
1765 | be[i] = branch->entries[branch->nr - i - 1]; | |
1766 | } | |
1767 | ||
1768 | nr = remove_loops(be, nr); | |
1769 | ||
1770 | for (i = 0; i < nr; i++) { | |
1771 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1772 | NULL, be[i].to); |
8b7bad58 AK |
1773 | if (!err) |
1774 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1775 | NULL, be[i].from); |
8b7bad58 AK |
1776 | if (err == -EINVAL) |
1777 | break; | |
1778 | if (err) | |
1779 | return err; | |
1780 | } | |
1781 | chain_nr -= nr; | |
1782 | } | |
1783 | ||
1784 | check_calls: | |
3f067dca ACM |
1785 | if (chain->nr > PERF_MAX_STACK_DEPTH) { |
1786 | pr_warning("corrupted callchain. skipping...\n"); | |
1787 | return 0; | |
1788 | } | |
1789 | ||
8b7bad58 | 1790 | for (i = first_call; i < chain_nr; i++) { |
3f067dca | 1791 | u64 ip; |
3f067dca ACM |
1792 | |
1793 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1794 | j = i; |
3f067dca | 1795 | else |
a60335ba SB |
1796 | j = chain->nr - i - 1; |
1797 | ||
1798 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1799 | if (j == skip_idx) | |
1800 | continue; | |
1801 | #endif | |
1802 | ip = chain->ips[j]; | |
3f067dca | 1803 | |
73dbcd65 | 1804 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
3f067dca | 1805 | |
3f067dca | 1806 | if (err) |
2e77784b | 1807 | return (err < 0) ? err : 0; |
3f067dca ACM |
1808 | } |
1809 | ||
1810 | return 0; | |
1811 | } | |
1812 | ||
1813 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1814 | { | |
1815 | struct callchain_cursor *cursor = arg; | |
1816 | return callchain_cursor_append(cursor, entry->ip, | |
1817 | entry->map, entry->sym); | |
1818 | } | |
1819 | ||
cc8b7c2b ACM |
1820 | int thread__resolve_callchain(struct thread *thread, |
1821 | struct perf_evsel *evsel, | |
1822 | struct perf_sample *sample, | |
1823 | struct symbol **parent, | |
1824 | struct addr_location *root_al, | |
1825 | int max_stack) | |
3f067dca | 1826 | { |
384b6055 KL |
1827 | int ret = thread__resolve_callchain_sample(thread, evsel, |
1828 | sample, parent, | |
1829 | root_al, max_stack); | |
3f067dca ACM |
1830 | if (ret) |
1831 | return ret; | |
1832 | ||
1833 | /* Can we do dwarf post unwind? */ | |
1834 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1835 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1836 | return 0; | |
1837 | ||
1838 | /* Bail out if nothing was captured. */ | |
1839 | if ((!sample->user_regs.regs) || | |
1840 | (!sample->user_stack.size)) | |
1841 | return 0; | |
1842 | ||
dd8c17a5 | 1843 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1844 | thread, sample, max_stack); |
3f067dca ACM |
1845 | |
1846 | } | |
35feee19 DA |
1847 | |
1848 | int machine__for_each_thread(struct machine *machine, | |
1849 | int (*fn)(struct thread *thread, void *p), | |
1850 | void *priv) | |
1851 | { | |
1852 | struct rb_node *nd; | |
1853 | struct thread *thread; | |
1854 | int rc = 0; | |
1855 | ||
1856 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1857 | thread = rb_entry(nd, struct thread, rb_node); | |
1858 | rc = fn(thread, priv); | |
1859 | if (rc != 0) | |
1860 | return rc; | |
1861 | } | |
1862 | ||
1863 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1864 | rc = fn(thread, priv); | |
1865 | if (rc != 0) | |
1866 | return rc; | |
1867 | } | |
1868 | return rc; | |
1869 | } | |
58d925dc | 1870 | |
a33fbd56 | 1871 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1872 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1873 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1874 | { |
602ad878 | 1875 | if (target__has_task(target)) |
58d925dc | 1876 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1877 | else if (target__has_cpu(target)) |
58d925dc ACM |
1878 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1879 | /* command specified */ | |
1880 | return 0; | |
1881 | } | |
b9d266ba AH |
1882 | |
1883 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1884 | { | |
1885 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1886 | return -1; | |
1887 | ||
1888 | return machine->current_tid[cpu]; | |
1889 | } | |
1890 | ||
1891 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1892 | pid_t tid) | |
1893 | { | |
1894 | struct thread *thread; | |
1895 | ||
1896 | if (cpu < 0) | |
1897 | return -EINVAL; | |
1898 | ||
1899 | if (!machine->current_tid) { | |
1900 | int i; | |
1901 | ||
1902 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1903 | if (!machine->current_tid) | |
1904 | return -ENOMEM; | |
1905 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1906 | machine->current_tid[i] = -1; | |
1907 | } | |
1908 | ||
1909 | if (cpu >= MAX_NR_CPUS) { | |
1910 | pr_err("Requested CPU %d too large. ", cpu); | |
1911 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1912 | return -EINVAL; | |
1913 | } | |
1914 | ||
1915 | machine->current_tid[cpu] = tid; | |
1916 | ||
1917 | thread = machine__findnew_thread(machine, pid, tid); | |
1918 | if (!thread) | |
1919 | return -ENOMEM; | |
1920 | ||
1921 | thread->cpu = cpu; | |
b91fc39f | 1922 | thread__put(thread); |
b9d266ba AH |
1923 | |
1924 | return 0; | |
1925 | } | |
fbe2af45 AH |
1926 | |
1927 | int machine__get_kernel_start(struct machine *machine) | |
1928 | { | |
1929 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1930 | int err = 0; | |
1931 | ||
1932 | /* | |
1933 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1934 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1935 | * all addresses including kernel addresses are less than 2^32. In | |
1936 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1937 | * addresses will be assumed to be in user space - see | |
1938 | * machine__kernel_ip(). | |
1939 | */ | |
1940 | machine->kernel_start = 1ULL << 63; | |
1941 | if (map) { | |
1942 | err = map__load(map, machine->symbol_filter); | |
1943 | if (map->start) | |
1944 | machine->kernel_start = map->start; | |
1945 | } | |
1946 | return err; | |
1947 | } | |
aa7cc2ae ACM |
1948 | |
1949 | struct dso *machine__findnew_dso(struct machine *machine, const char *filename) | |
1950 | { | |
1951 | return __dsos__findnew(&machine->dsos, filename); | |
1952 | } |