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; | |
e8807844 | 23 | pthread_rwlock_init(&dsos->lock, NULL); |
e167f995 ACM |
24 | } |
25 | ||
69d2591a ACM |
26 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
27 | { | |
11246c70 | 28 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 29 | RB_CLEAR_NODE(&machine->rb_node); |
3d39ac53 | 30 | dsos__init(&machine->dsos); |
69d2591a ACM |
31 | |
32 | machine->threads = RB_ROOT; | |
b91fc39f | 33 | pthread_rwlock_init(&machine->threads_lock, NULL); |
69d2591a ACM |
34 | INIT_LIST_HEAD(&machine->dead_threads); |
35 | machine->last_match = NULL; | |
36 | ||
d027b640 | 37 | machine->vdso_info = NULL; |
4cde998d | 38 | machine->env = NULL; |
d027b640 | 39 | |
69d2591a ACM |
40 | machine->pid = pid; |
41 | ||
611a5ce8 | 42 | machine->symbol_filter = NULL; |
14bd6d20 | 43 | machine->id_hdr_size = 0; |
cfe1c414 | 44 | machine->comm_exec = false; |
fbe2af45 | 45 | machine->kernel_start = 0; |
611a5ce8 | 46 | |
cc1121ab MH |
47 | memset(machine->vmlinux_maps, 0, sizeof(machine->vmlinux_maps)); |
48 | ||
69d2591a ACM |
49 | machine->root_dir = strdup(root_dir); |
50 | if (machine->root_dir == NULL) | |
51 | return -ENOMEM; | |
52 | ||
53 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 54 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 55 | pid); |
69d2591a ACM |
56 | char comm[64]; |
57 | ||
58 | if (thread == NULL) | |
59 | return -ENOMEM; | |
60 | ||
61 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 62 | thread__set_comm(thread, comm, 0); |
b91fc39f | 63 | thread__put(thread); |
69d2591a ACM |
64 | } |
65 | ||
b9d266ba AH |
66 | machine->current_tid = NULL; |
67 | ||
69d2591a ACM |
68 | return 0; |
69 | } | |
70 | ||
8fb598e5 DA |
71 | struct machine *machine__new_host(void) |
72 | { | |
73 | struct machine *machine = malloc(sizeof(*machine)); | |
74 | ||
75 | if (machine != NULL) { | |
76 | machine__init(machine, "", HOST_KERNEL_ID); | |
77 | ||
78 | if (machine__create_kernel_maps(machine) < 0) | |
79 | goto out_delete; | |
80 | } | |
81 | ||
82 | return machine; | |
83 | out_delete: | |
84 | free(machine); | |
85 | return NULL; | |
86 | } | |
87 | ||
d3a7c489 | 88 | static void dsos__purge(struct dsos *dsos) |
69d2591a ACM |
89 | { |
90 | struct dso *pos, *n; | |
91 | ||
e8807844 ACM |
92 | pthread_rwlock_wrlock(&dsos->lock); |
93 | ||
8fa7d87f | 94 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 95 | RB_CLEAR_NODE(&pos->rb_node); |
e266a753 | 96 | pos->root = NULL; |
d3a7c489 ACM |
97 | list_del_init(&pos->node); |
98 | dso__put(pos); | |
69d2591a | 99 | } |
e8807844 ACM |
100 | |
101 | pthread_rwlock_unlock(&dsos->lock); | |
d3a7c489 | 102 | } |
e8807844 | 103 | |
d3a7c489 ACM |
104 | static void dsos__exit(struct dsos *dsos) |
105 | { | |
106 | dsos__purge(dsos); | |
e8807844 | 107 | pthread_rwlock_destroy(&dsos->lock); |
69d2591a ACM |
108 | } |
109 | ||
3f067dca ACM |
110 | void machine__delete_threads(struct machine *machine) |
111 | { | |
b91fc39f | 112 | struct rb_node *nd; |
3f067dca | 113 | |
b91fc39f ACM |
114 | pthread_rwlock_wrlock(&machine->threads_lock); |
115 | nd = rb_first(&machine->threads); | |
3f067dca ACM |
116 | while (nd) { |
117 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
118 | ||
3f067dca | 119 | nd = rb_next(nd); |
b91fc39f | 120 | __machine__remove_thread(machine, t, false); |
3f067dca | 121 | } |
b91fc39f | 122 | pthread_rwlock_unlock(&machine->threads_lock); |
3f067dca ACM |
123 | } |
124 | ||
69d2591a ACM |
125 | void machine__exit(struct machine *machine) |
126 | { | |
ebe9729c | 127 | machine__destroy_kernel_maps(machine); |
69d2591a | 128 | map_groups__exit(&machine->kmaps); |
e8807844 | 129 | dsos__exit(&machine->dsos); |
9a4388c7 | 130 | machine__exit_vdso(machine); |
04662523 | 131 | zfree(&machine->root_dir); |
b9d266ba | 132 | zfree(&machine->current_tid); |
b91fc39f | 133 | pthread_rwlock_destroy(&machine->threads_lock); |
69d2591a ACM |
134 | } |
135 | ||
136 | void machine__delete(struct machine *machine) | |
137 | { | |
138 | machine__exit(machine); | |
139 | free(machine); | |
140 | } | |
141 | ||
876650e6 ACM |
142 | void machines__init(struct machines *machines) |
143 | { | |
144 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
145 | machines->guests = RB_ROOT; | |
611a5ce8 | 146 | machines->symbol_filter = NULL; |
876650e6 ACM |
147 | } |
148 | ||
149 | void machines__exit(struct machines *machines) | |
150 | { | |
151 | machine__exit(&machines->host); | |
152 | /* XXX exit guest */ | |
153 | } | |
154 | ||
155 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
156 | const char *root_dir) |
157 | { | |
876650e6 | 158 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
159 | struct rb_node *parent = NULL; |
160 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
161 | ||
162 | if (machine == NULL) | |
163 | return NULL; | |
164 | ||
165 | if (machine__init(machine, root_dir, pid) != 0) { | |
166 | free(machine); | |
167 | return NULL; | |
168 | } | |
169 | ||
611a5ce8 AH |
170 | machine->symbol_filter = machines->symbol_filter; |
171 | ||
69d2591a ACM |
172 | while (*p != NULL) { |
173 | parent = *p; | |
174 | pos = rb_entry(parent, struct machine, rb_node); | |
175 | if (pid < pos->pid) | |
176 | p = &(*p)->rb_left; | |
177 | else | |
178 | p = &(*p)->rb_right; | |
179 | } | |
180 | ||
181 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 182 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
183 | |
184 | return machine; | |
185 | } | |
186 | ||
611a5ce8 AH |
187 | void machines__set_symbol_filter(struct machines *machines, |
188 | symbol_filter_t symbol_filter) | |
189 | { | |
190 | struct rb_node *nd; | |
191 | ||
192 | machines->symbol_filter = symbol_filter; | |
193 | machines->host.symbol_filter = symbol_filter; | |
194 | ||
195 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
196 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
197 | ||
198 | machine->symbol_filter = symbol_filter; | |
199 | } | |
200 | } | |
201 | ||
cfe1c414 AH |
202 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
203 | { | |
204 | struct rb_node *nd; | |
205 | ||
206 | machines->host.comm_exec = comm_exec; | |
207 | ||
208 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
209 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
210 | ||
211 | machine->comm_exec = comm_exec; | |
212 | } | |
213 | } | |
214 | ||
876650e6 | 215 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 216 | { |
876650e6 | 217 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
218 | struct rb_node *parent = NULL; |
219 | struct machine *machine; | |
220 | struct machine *default_machine = NULL; | |
221 | ||
876650e6 ACM |
222 | if (pid == HOST_KERNEL_ID) |
223 | return &machines->host; | |
224 | ||
69d2591a ACM |
225 | while (*p != NULL) { |
226 | parent = *p; | |
227 | machine = rb_entry(parent, struct machine, rb_node); | |
228 | if (pid < machine->pid) | |
229 | p = &(*p)->rb_left; | |
230 | else if (pid > machine->pid) | |
231 | p = &(*p)->rb_right; | |
232 | else | |
233 | return machine; | |
234 | if (!machine->pid) | |
235 | default_machine = machine; | |
236 | } | |
237 | ||
238 | return default_machine; | |
239 | } | |
240 | ||
876650e6 | 241 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
242 | { |
243 | char path[PATH_MAX]; | |
244 | const char *root_dir = ""; | |
245 | struct machine *machine = machines__find(machines, pid); | |
246 | ||
247 | if (machine && (machine->pid == pid)) | |
248 | goto out; | |
249 | ||
250 | if ((pid != HOST_KERNEL_ID) && | |
251 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
252 | (symbol_conf.guestmount)) { | |
253 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
254 | if (access(path, R_OK)) { | |
255 | static struct strlist *seen; | |
256 | ||
257 | if (!seen) | |
4a77e218 | 258 | seen = strlist__new(NULL, NULL); |
69d2591a ACM |
259 | |
260 | if (!strlist__has_entry(seen, path)) { | |
261 | pr_err("Can't access file %s\n", path); | |
262 | strlist__add(seen, path); | |
263 | } | |
264 | machine = NULL; | |
265 | goto out; | |
266 | } | |
267 | root_dir = path; | |
268 | } | |
269 | ||
270 | machine = machines__add(machines, pid, root_dir); | |
271 | out: | |
272 | return machine; | |
273 | } | |
274 | ||
876650e6 ACM |
275 | void machines__process_guests(struct machines *machines, |
276 | machine__process_t process, void *data) | |
69d2591a ACM |
277 | { |
278 | struct rb_node *nd; | |
279 | ||
876650e6 | 280 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
281 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
282 | process(pos, data); | |
283 | } | |
284 | } | |
285 | ||
286 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
287 | { | |
288 | if (machine__is_host(machine)) | |
289 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
290 | else if (machine__is_default_guest(machine)) | |
291 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
292 | else { | |
293 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
294 | machine->pid); | |
295 | } | |
296 | ||
297 | return bf; | |
298 | } | |
299 | ||
876650e6 | 300 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
301 | { |
302 | struct rb_node *node; | |
303 | struct machine *machine; | |
304 | ||
876650e6 ACM |
305 | machines->host.id_hdr_size = id_hdr_size; |
306 | ||
307 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
308 | machine = rb_entry(node, struct machine, rb_node); |
309 | machine->id_hdr_size = id_hdr_size; | |
310 | } | |
311 | ||
312 | return; | |
313 | } | |
314 | ||
29ce3612 AH |
315 | static void machine__update_thread_pid(struct machine *machine, |
316 | struct thread *th, pid_t pid) | |
317 | { | |
318 | struct thread *leader; | |
319 | ||
320 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
321 | return; | |
322 | ||
323 | th->pid_ = pid; | |
324 | ||
325 | if (th->pid_ == th->tid) | |
326 | return; | |
327 | ||
b91fc39f | 328 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
329 | if (!leader) |
330 | goto out_err; | |
331 | ||
332 | if (!leader->mg) | |
11246c70 | 333 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
334 | |
335 | if (!leader->mg) | |
336 | goto out_err; | |
337 | ||
338 | if (th->mg == leader->mg) | |
339 | return; | |
340 | ||
341 | if (th->mg) { | |
342 | /* | |
343 | * Maps are created from MMAP events which provide the pid and | |
344 | * tid. Consequently there never should be any maps on a thread | |
345 | * with an unknown pid. Just print an error if there are. | |
346 | */ | |
347 | if (!map_groups__empty(th->mg)) | |
348 | pr_err("Discarding thread maps for %d:%d\n", | |
349 | th->pid_, th->tid); | |
8e160b2e | 350 | map_groups__put(th->mg); |
29ce3612 AH |
351 | } |
352 | ||
353 | th->mg = map_groups__get(leader->mg); | |
354 | ||
355 | return; | |
356 | ||
357 | out_err: | |
358 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
359 | } | |
360 | ||
b91fc39f ACM |
361 | static struct thread *____machine__findnew_thread(struct machine *machine, |
362 | pid_t pid, pid_t tid, | |
363 | bool create) | |
9d2f8e22 ACM |
364 | { |
365 | struct rb_node **p = &machine->threads.rb_node; | |
366 | struct rb_node *parent = NULL; | |
367 | struct thread *th; | |
368 | ||
369 | /* | |
38051234 | 370 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
371 | * so most of the time we dont have to look up |
372 | * the full rbtree: | |
373 | */ | |
29ce3612 | 374 | th = machine->last_match; |
f3b623b8 ACM |
375 | if (th != NULL) { |
376 | if (th->tid == tid) { | |
377 | machine__update_thread_pid(machine, th, pid); | |
378 | return th; | |
379 | } | |
380 | ||
0ceb8f6e | 381 | machine->last_match = NULL; |
99d725fc | 382 | } |
9d2f8e22 ACM |
383 | |
384 | while (*p != NULL) { | |
385 | parent = *p; | |
386 | th = rb_entry(parent, struct thread, rb_node); | |
387 | ||
38051234 | 388 | if (th->tid == tid) { |
0ceb8f6e | 389 | machine->last_match = th; |
29ce3612 | 390 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
391 | return th; |
392 | } | |
393 | ||
38051234 | 394 | if (tid < th->tid) |
9d2f8e22 ACM |
395 | p = &(*p)->rb_left; |
396 | else | |
397 | p = &(*p)->rb_right; | |
398 | } | |
399 | ||
400 | if (!create) | |
401 | return NULL; | |
402 | ||
99d725fc | 403 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
404 | if (th != NULL) { |
405 | rb_link_node(&th->rb_node, parent, p); | |
406 | rb_insert_color(&th->rb_node, &machine->threads); | |
cddcef60 JO |
407 | |
408 | /* | |
409 | * We have to initialize map_groups separately | |
410 | * after rb tree is updated. | |
411 | * | |
412 | * The reason is that we call machine__findnew_thread | |
413 | * within thread__init_map_groups to find the thread | |
414 | * leader and that would screwed the rb tree. | |
415 | */ | |
418029b7 | 416 | if (thread__init_map_groups(th, machine)) { |
0170b14f | 417 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 418 | RB_CLEAR_NODE(&th->rb_node); |
418029b7 | 419 | thread__delete(th); |
cddcef60 | 420 | return NULL; |
418029b7 | 421 | } |
f3b623b8 ACM |
422 | /* |
423 | * It is now in the rbtree, get a ref | |
424 | */ | |
425 | thread__get(th); | |
0ceb8f6e | 426 | machine->last_match = th; |
9d2f8e22 ACM |
427 | } |
428 | ||
429 | return th; | |
430 | } | |
431 | ||
b91fc39f ACM |
432 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
433 | { | |
434 | return ____machine__findnew_thread(machine, pid, tid, true); | |
435 | } | |
436 | ||
314add6b AH |
437 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
438 | pid_t tid) | |
9d2f8e22 | 439 | { |
b91fc39f ACM |
440 | struct thread *th; |
441 | ||
442 | pthread_rwlock_wrlock(&machine->threads_lock); | |
443 | th = thread__get(__machine__findnew_thread(machine, pid, tid)); | |
444 | pthread_rwlock_unlock(&machine->threads_lock); | |
445 | return th; | |
9d2f8e22 ACM |
446 | } |
447 | ||
d75e6097 JO |
448 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
449 | pid_t tid) | |
9d2f8e22 | 450 | { |
b91fc39f ACM |
451 | struct thread *th; |
452 | pthread_rwlock_rdlock(&machine->threads_lock); | |
453 | th = thread__get(____machine__findnew_thread(machine, pid, tid, false)); | |
454 | pthread_rwlock_unlock(&machine->threads_lock); | |
455 | return th; | |
9d2f8e22 | 456 | } |
b0a7d1a0 | 457 | |
cfe1c414 AH |
458 | struct comm *machine__thread_exec_comm(struct machine *machine, |
459 | struct thread *thread) | |
460 | { | |
461 | if (machine->comm_exec) | |
462 | return thread__exec_comm(thread); | |
463 | else | |
464 | return thread__comm(thread); | |
465 | } | |
466 | ||
162f0bef FW |
467 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
468 | struct perf_sample *sample) | |
b0a7d1a0 | 469 | { |
314add6b AH |
470 | struct thread *thread = machine__findnew_thread(machine, |
471 | event->comm.pid, | |
472 | event->comm.tid); | |
65de51f9 | 473 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 474 | int err = 0; |
b0a7d1a0 | 475 | |
cfe1c414 AH |
476 | if (exec) |
477 | machine->comm_exec = true; | |
478 | ||
b0a7d1a0 ACM |
479 | if (dump_trace) |
480 | perf_event__fprintf_comm(event, stdout); | |
481 | ||
65de51f9 AH |
482 | if (thread == NULL || |
483 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 484 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 485 | err = -1; |
b0a7d1a0 ACM |
486 | } |
487 | ||
b91fc39f ACM |
488 | thread__put(thread); |
489 | ||
490 | return err; | |
b0a7d1a0 ACM |
491 | } |
492 | ||
493 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 494 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
495 | { |
496 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
497 | event->lost.id, event->lost.lost); | |
498 | return 0; | |
499 | } | |
500 | ||
c4937a91 KL |
501 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
502 | union perf_event *event, struct perf_sample *sample) | |
503 | { | |
504 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n", | |
505 | sample->id, event->lost_samples.lost); | |
506 | return 0; | |
507 | } | |
508 | ||
9f2de315 ACM |
509 | static struct dso *machine__findnew_module_dso(struct machine *machine, |
510 | struct kmod_path *m, | |
511 | const char *filename) | |
da17ea33 JO |
512 | { |
513 | struct dso *dso; | |
da17ea33 | 514 | |
e8807844 ACM |
515 | pthread_rwlock_wrlock(&machine->dsos.lock); |
516 | ||
517 | dso = __dsos__find(&machine->dsos, m->name, true); | |
da17ea33 | 518 | if (!dso) { |
e8807844 | 519 | dso = __dsos__addnew(&machine->dsos, m->name); |
da17ea33 | 520 | if (dso == NULL) |
e8807844 | 521 | goto out_unlock; |
da17ea33 JO |
522 | |
523 | if (machine__is_host(machine)) | |
524 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
525 | else | |
526 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
527 | ||
528 | /* _KMODULE_COMP should be next to _KMODULE */ | |
ca33380a | 529 | if (m->kmod && m->comp) |
da17ea33 | 530 | dso->symtab_type++; |
ca33380a JO |
531 | |
532 | dso__set_short_name(dso, strdup(m->name), true); | |
533 | dso__set_long_name(dso, strdup(filename), true); | |
da17ea33 JO |
534 | } |
535 | ||
d3a7c489 | 536 | dso__get(dso); |
e8807844 ACM |
537 | out_unlock: |
538 | pthread_rwlock_unlock(&machine->dsos.lock); | |
da17ea33 JO |
539 | return dso; |
540 | } | |
541 | ||
4a96f7a0 AH |
542 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
543 | union perf_event *event) | |
544 | { | |
545 | if (dump_trace) | |
546 | perf_event__fprintf_aux(event, stdout); | |
547 | return 0; | |
548 | } | |
549 | ||
0ad21f68 AH |
550 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
551 | union perf_event *event) | |
552 | { | |
553 | if (dump_trace) | |
554 | perf_event__fprintf_itrace_start(event, stdout); | |
555 | return 0; | |
556 | } | |
557 | ||
0286039f AH |
558 | int machine__process_switch_event(struct machine *machine __maybe_unused, |
559 | union perf_event *event) | |
560 | { | |
561 | if (dump_trace) | |
562 | perf_event__fprintf_switch(event, stdout); | |
563 | return 0; | |
564 | } | |
565 | ||
c03d5184 WN |
566 | static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename) |
567 | { | |
568 | const char *dup_filename; | |
569 | ||
570 | if (!filename || !dso || !dso->long_name) | |
571 | return; | |
572 | if (dso->long_name[0] != '[') | |
573 | return; | |
574 | if (!strchr(filename, '/')) | |
575 | return; | |
576 | ||
577 | dup_filename = strdup(filename); | |
578 | if (!dup_filename) | |
579 | return; | |
580 | ||
5dcf16df | 581 | dso__set_long_name(dso, dup_filename, true); |
c03d5184 WN |
582 | } |
583 | ||
9f2de315 ACM |
584 | struct map *machine__findnew_module_map(struct machine *machine, u64 start, |
585 | const char *filename) | |
3f067dca | 586 | { |
ca33380a | 587 | struct map *map = NULL; |
566c69c3 | 588 | struct dso *dso = NULL; |
ca33380a | 589 | struct kmod_path m; |
3f067dca | 590 | |
ca33380a | 591 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
592 | return NULL; |
593 | ||
bc84f464 JO |
594 | map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, |
595 | m.name); | |
c03d5184 WN |
596 | if (map) { |
597 | /* | |
598 | * If the map's dso is an offline module, give dso__load() | |
599 | * a chance to find the file path of that module by fixing | |
600 | * long_name. | |
601 | */ | |
602 | dso__adjust_kmod_long_name(map->dso, filename); | |
bc84f464 | 603 | goto out; |
c03d5184 | 604 | } |
bc84f464 | 605 | |
9f2de315 | 606 | dso = machine__findnew_module_dso(machine, &m, filename); |
ca33380a JO |
607 | if (dso == NULL) |
608 | goto out; | |
609 | ||
3f067dca ACM |
610 | map = map__new2(start, dso, MAP__FUNCTION); |
611 | if (map == NULL) | |
ca33380a | 612 | goto out; |
3f067dca | 613 | |
3f067dca | 614 | map_groups__insert(&machine->kmaps, map); |
ca33380a | 615 | |
9afcb420 MH |
616 | /* Put the map here because map_groups__insert alread got it */ |
617 | map__put(map); | |
ca33380a | 618 | out: |
566c69c3 MH |
619 | /* put the dso here, corresponding to machine__findnew_module_dso */ |
620 | dso__put(dso); | |
ca33380a | 621 | free(m.name); |
3f067dca ACM |
622 | return map; |
623 | } | |
624 | ||
876650e6 | 625 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
626 | { |
627 | struct rb_node *nd; | |
3d39ac53 | 628 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 629 | |
876650e6 | 630 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 631 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 632 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
633 | } |
634 | ||
635 | return ret; | |
636 | } | |
637 | ||
8fa7d87f | 638 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
639 | bool (skip)(struct dso *dso, int parm), int parm) |
640 | { | |
3d39ac53 | 641 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
642 | } |
643 | ||
876650e6 | 644 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
645 | bool (skip)(struct dso *dso, int parm), int parm) |
646 | { | |
647 | struct rb_node *nd; | |
876650e6 | 648 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 649 | |
876650e6 | 650 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
651 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
652 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
653 | } | |
654 | return ret; | |
655 | } | |
656 | ||
657 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
658 | { | |
659 | int i; | |
660 | size_t printed = 0; | |
a5e813c6 | 661 | struct dso *kdso = machine__kernel_map(machine)->dso; |
3f067dca ACM |
662 | |
663 | if (kdso->has_build_id) { | |
664 | char filename[PATH_MAX]; | |
665 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
666 | printed += fprintf(fp, "[0] %s\n", filename); | |
667 | } | |
668 | ||
669 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
670 | printed += fprintf(fp, "[%d] %s\n", | |
671 | i + kdso->has_build_id, vmlinux_path[i]); | |
672 | ||
673 | return printed; | |
674 | } | |
675 | ||
676 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
677 | { | |
678 | size_t ret = 0; | |
679 | struct rb_node *nd; | |
680 | ||
b91fc39f ACM |
681 | pthread_rwlock_rdlock(&machine->threads_lock); |
682 | ||
3f067dca ACM |
683 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { |
684 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
685 | ||
686 | ret += thread__fprintf(pos, fp); | |
687 | } | |
688 | ||
b91fc39f ACM |
689 | pthread_rwlock_unlock(&machine->threads_lock); |
690 | ||
3f067dca ACM |
691 | return ret; |
692 | } | |
693 | ||
694 | static struct dso *machine__get_kernel(struct machine *machine) | |
695 | { | |
696 | const char *vmlinux_name = NULL; | |
697 | struct dso *kernel; | |
698 | ||
699 | if (machine__is_host(machine)) { | |
700 | vmlinux_name = symbol_conf.vmlinux_name; | |
701 | if (!vmlinux_name) | |
702 | vmlinux_name = "[kernel.kallsyms]"; | |
703 | ||
459ce518 ACM |
704 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
705 | "[kernel]", DSO_TYPE_KERNEL); | |
3f067dca ACM |
706 | } else { |
707 | char bf[PATH_MAX]; | |
708 | ||
709 | if (machine__is_default_guest(machine)) | |
710 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
711 | if (!vmlinux_name) | |
712 | vmlinux_name = machine__mmap_name(machine, bf, | |
713 | sizeof(bf)); | |
714 | ||
459ce518 ACM |
715 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
716 | "[guest.kernel]", | |
717 | DSO_TYPE_GUEST_KERNEL); | |
3f067dca ACM |
718 | } |
719 | ||
720 | if (kernel != NULL && (!kernel->has_build_id)) | |
721 | dso__read_running_kernel_build_id(kernel, machine); | |
722 | ||
723 | return kernel; | |
724 | } | |
725 | ||
726 | struct process_args { | |
727 | u64 start; | |
728 | }; | |
729 | ||
15a0a870 AH |
730 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
731 | size_t bufsz) | |
732 | { | |
733 | if (machine__is_default_guest(machine)) | |
734 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
735 | else | |
736 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
737 | } | |
738 | ||
a93f0e55 SQ |
739 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
740 | ||
741 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
742 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
743 | * symbol_name if it's not that important. | |
744 | */ | |
4b99375b AH |
745 | static u64 machine__get_running_kernel_start(struct machine *machine, |
746 | const char **symbol_name) | |
3f067dca | 747 | { |
15a0a870 | 748 | char filename[PATH_MAX]; |
a93f0e55 SQ |
749 | int i; |
750 | const char *name; | |
751 | u64 addr = 0; | |
3f067dca | 752 | |
15a0a870 | 753 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
754 | |
755 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
756 | return 0; | |
757 | ||
a93f0e55 SQ |
758 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
759 | addr = kallsyms__get_function_start(filename, name); | |
760 | if (addr) | |
761 | break; | |
762 | } | |
763 | ||
764 | if (symbol_name) | |
765 | *symbol_name = name; | |
3f067dca | 766 | |
a93f0e55 | 767 | return addr; |
3f067dca ACM |
768 | } |
769 | ||
770 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
771 | { | |
772 | enum map_type type; | |
4b99375b | 773 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca | 774 | |
cc1121ab MH |
775 | /* In case of renewal the kernel map, destroy previous one */ |
776 | machine__destroy_kernel_maps(machine); | |
777 | ||
3f067dca ACM |
778 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
779 | struct kmap *kmap; | |
77e65977 | 780 | struct map *map; |
3f067dca ACM |
781 | |
782 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
783 | if (machine->vmlinux_maps[type] == NULL) | |
784 | return -1; | |
785 | ||
786 | machine->vmlinux_maps[type]->map_ip = | |
787 | machine->vmlinux_maps[type]->unmap_ip = | |
788 | identity__map_ip; | |
a5e813c6 | 789 | map = __machine__kernel_map(machine, type); |
77e65977 | 790 | kmap = map__kmap(map); |
ba92732e WN |
791 | if (!kmap) |
792 | return -1; | |
793 | ||
3f067dca | 794 | kmap->kmaps = &machine->kmaps; |
77e65977 | 795 | map_groups__insert(&machine->kmaps, map); |
3f067dca ACM |
796 | } |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | void machine__destroy_kernel_maps(struct machine *machine) | |
802 | { | |
803 | enum map_type type; | |
804 | ||
805 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
806 | struct kmap *kmap; | |
a5e813c6 | 807 | struct map *map = __machine__kernel_map(machine, type); |
3f067dca | 808 | |
77e65977 | 809 | if (map == NULL) |
3f067dca ACM |
810 | continue; |
811 | ||
77e65977 ACM |
812 | kmap = map__kmap(map); |
813 | map_groups__remove(&machine->kmaps, map); | |
ba92732e | 814 | if (kmap && kmap->ref_reloc_sym) { |
3f067dca ACM |
815 | /* |
816 | * ref_reloc_sym is shared among all maps, so free just | |
817 | * on one of them. | |
818 | */ | |
819 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
820 | zfree((char **)&kmap->ref_reloc_sym->name); |
821 | zfree(&kmap->ref_reloc_sym); | |
822 | } else | |
823 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
824 | } |
825 | ||
e96e4078 | 826 | map__put(machine->vmlinux_maps[type]); |
3f067dca ACM |
827 | machine->vmlinux_maps[type] = NULL; |
828 | } | |
829 | } | |
830 | ||
876650e6 | 831 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
832 | { |
833 | int ret = 0; | |
834 | struct dirent **namelist = NULL; | |
835 | int i, items = 0; | |
836 | char path[PATH_MAX]; | |
837 | pid_t pid; | |
838 | char *endp; | |
839 | ||
840 | if (symbol_conf.default_guest_vmlinux_name || | |
841 | symbol_conf.default_guest_modules || | |
842 | symbol_conf.default_guest_kallsyms) { | |
843 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
844 | } | |
845 | ||
846 | if (symbol_conf.guestmount) { | |
847 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
848 | if (items <= 0) | |
849 | return -ENOENT; | |
850 | for (i = 0; i < items; i++) { | |
851 | if (!isdigit(namelist[i]->d_name[0])) { | |
852 | /* Filter out . and .. */ | |
853 | continue; | |
854 | } | |
855 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
856 | if ((*endp != '\0') || | |
857 | (endp == namelist[i]->d_name) || | |
858 | (errno == ERANGE)) { | |
859 | pr_debug("invalid directory (%s). Skipping.\n", | |
860 | namelist[i]->d_name); | |
861 | continue; | |
862 | } | |
863 | sprintf(path, "%s/%s/proc/kallsyms", | |
864 | symbol_conf.guestmount, | |
865 | namelist[i]->d_name); | |
866 | ret = access(path, R_OK); | |
867 | if (ret) { | |
868 | pr_debug("Can't access file %s\n", path); | |
869 | goto failure; | |
870 | } | |
871 | machines__create_kernel_maps(machines, pid); | |
872 | } | |
873 | failure: | |
874 | free(namelist); | |
875 | } | |
876 | ||
877 | return ret; | |
878 | } | |
879 | ||
876650e6 | 880 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 881 | { |
876650e6 ACM |
882 | struct rb_node *next = rb_first(&machines->guests); |
883 | ||
884 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
885 | |
886 | while (next) { | |
887 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
888 | ||
889 | next = rb_next(&pos->rb_node); | |
876650e6 | 890 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
891 | machine__delete(pos); |
892 | } | |
893 | } | |
894 | ||
876650e6 | 895 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
896 | { |
897 | struct machine *machine = machines__findnew(machines, pid); | |
898 | ||
899 | if (machine == NULL) | |
900 | return -1; | |
901 | ||
902 | return machine__create_kernel_maps(machine); | |
903 | } | |
904 | ||
905 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
906 | enum map_type type, symbol_filter_t filter) | |
907 | { | |
a5e813c6 | 908 | struct map *map = machine__kernel_map(machine); |
3f067dca ACM |
909 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
910 | ||
911 | if (ret > 0) { | |
912 | dso__set_loaded(map->dso, type); | |
913 | /* | |
914 | * Since /proc/kallsyms will have multiple sessions for the | |
915 | * kernel, with modules between them, fixup the end of all | |
916 | * sections. | |
917 | */ | |
918 | __map_groups__fixup_end(&machine->kmaps, type); | |
919 | } | |
920 | ||
921 | return ret; | |
922 | } | |
923 | ||
924 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
925 | symbol_filter_t filter) | |
926 | { | |
a5e813c6 | 927 | struct map *map = machine__kernel_map(machine); |
3f067dca ACM |
928 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
929 | ||
39b12f78 | 930 | if (ret > 0) |
3f067dca | 931 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
932 | |
933 | return ret; | |
934 | } | |
935 | ||
936 | static void map_groups__fixup_end(struct map_groups *mg) | |
937 | { | |
938 | int i; | |
939 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
940 | __map_groups__fixup_end(mg, i); | |
941 | } | |
942 | ||
943 | static char *get_kernel_version(const char *root_dir) | |
944 | { | |
945 | char version[PATH_MAX]; | |
946 | FILE *file; | |
947 | char *name, *tmp; | |
948 | const char *prefix = "Linux version "; | |
949 | ||
950 | sprintf(version, "%s/proc/version", root_dir); | |
951 | file = fopen(version, "r"); | |
952 | if (!file) | |
953 | return NULL; | |
954 | ||
955 | version[0] = '\0'; | |
956 | tmp = fgets(version, sizeof(version), file); | |
957 | fclose(file); | |
958 | ||
959 | name = strstr(version, prefix); | |
960 | if (!name) | |
961 | return NULL; | |
962 | name += strlen(prefix); | |
963 | tmp = strchr(name, ' '); | |
964 | if (tmp) | |
965 | *tmp = '\0'; | |
966 | ||
967 | return strdup(name); | |
968 | } | |
969 | ||
bb58a8a4 JO |
970 | static bool is_kmod_dso(struct dso *dso) |
971 | { | |
972 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
973 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
974 | } | |
975 | ||
976 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
977 | struct kmod_path *m) | |
978 | { | |
979 | struct map *map; | |
980 | char *long_name; | |
981 | ||
982 | map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name); | |
983 | if (map == NULL) | |
984 | return 0; | |
985 | ||
986 | long_name = strdup(path); | |
987 | if (long_name == NULL) | |
988 | return -ENOMEM; | |
989 | ||
990 | dso__set_long_name(map->dso, long_name, true); | |
991 | dso__kernel_module_get_build_id(map->dso, ""); | |
992 | ||
993 | /* | |
994 | * Full name could reveal us kmod compression, so | |
995 | * we need to update the symtab_type if needed. | |
996 | */ | |
997 | if (m->comp && is_kmod_dso(map->dso)) | |
998 | map->dso->symtab_type++; | |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
3f067dca | 1003 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 1004 | const char *dir_name, int depth) |
3f067dca ACM |
1005 | { |
1006 | struct dirent *dent; | |
1007 | DIR *dir = opendir(dir_name); | |
1008 | int ret = 0; | |
1009 | ||
1010 | if (!dir) { | |
1011 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
1012 | return -1; | |
1013 | } | |
1014 | ||
1015 | while ((dent = readdir(dir)) != NULL) { | |
1016 | char path[PATH_MAX]; | |
1017 | struct stat st; | |
1018 | ||
1019 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1020 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
1021 | if (stat(path, &st)) | |
1022 | continue; | |
1023 | ||
1024 | if (S_ISDIR(st.st_mode)) { | |
1025 | if (!strcmp(dent->d_name, ".") || | |
1026 | !strcmp(dent->d_name, "..")) | |
1027 | continue; | |
1028 | ||
61d4290c RY |
1029 | /* Do not follow top-level source and build symlinks */ |
1030 | if (depth == 0) { | |
1031 | if (!strcmp(dent->d_name, "source") || | |
1032 | !strcmp(dent->d_name, "build")) | |
1033 | continue; | |
1034 | } | |
1035 | ||
1036 | ret = map_groups__set_modules_path_dir(mg, path, | |
1037 | depth + 1); | |
3f067dca ACM |
1038 | if (ret < 0) |
1039 | goto out; | |
1040 | } else { | |
bb58a8a4 | 1041 | struct kmod_path m; |
3f067dca | 1042 | |
bb58a8a4 JO |
1043 | ret = kmod_path__parse_name(&m, dent->d_name); |
1044 | if (ret) | |
1045 | goto out; | |
c00c48fc | 1046 | |
bb58a8a4 JO |
1047 | if (m.kmod) |
1048 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 1049 | |
bb58a8a4 | 1050 | free(m.name); |
3f067dca | 1051 | |
bb58a8a4 | 1052 | if (ret) |
3f067dca | 1053 | goto out; |
3f067dca ACM |
1054 | } |
1055 | } | |
1056 | ||
1057 | out: | |
1058 | closedir(dir); | |
1059 | return ret; | |
1060 | } | |
1061 | ||
1062 | static int machine__set_modules_path(struct machine *machine) | |
1063 | { | |
1064 | char *version; | |
1065 | char modules_path[PATH_MAX]; | |
1066 | ||
1067 | version = get_kernel_version(machine->root_dir); | |
1068 | if (!version) | |
1069 | return -1; | |
1070 | ||
61d4290c | 1071 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1072 | machine->root_dir, version); |
1073 | free(version); | |
1074 | ||
61d4290c | 1075 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
1076 | } |
1077 | ||
316d70d6 | 1078 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 1079 | { |
316d70d6 | 1080 | struct machine *machine = arg; |
3f067dca | 1081 | struct map *map; |
316d70d6 | 1082 | |
9f2de315 | 1083 | map = machine__findnew_module_map(machine, start, name); |
316d70d6 AH |
1084 | if (map == NULL) |
1085 | return -1; | |
1086 | ||
1087 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | static int machine__create_modules(struct machine *machine) | |
1093 | { | |
3f067dca ACM |
1094 | const char *modules; |
1095 | char path[PATH_MAX]; | |
1096 | ||
f4be904d | 1097 | if (machine__is_default_guest(machine)) { |
3f067dca | 1098 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1099 | } else { |
1100 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1101 | modules = path; |
1102 | } | |
1103 | ||
aa7fe3b0 | 1104 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1105 | return -1; |
1106 | ||
316d70d6 | 1107 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1108 | return -1; |
1109 | ||
316d70d6 AH |
1110 | if (!machine__set_modules_path(machine)) |
1111 | return 0; | |
3f067dca | 1112 | |
316d70d6 | 1113 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1114 | |
8f76fcd9 | 1115 | return 0; |
3f067dca ACM |
1116 | } |
1117 | ||
1118 | int machine__create_kernel_maps(struct machine *machine) | |
1119 | { | |
1120 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 1121 | const char *name; |
4b99375b | 1122 | u64 addr = machine__get_running_kernel_start(machine, &name); |
1154c957 MH |
1123 | int ret; |
1124 | ||
1125 | if (!addr || kernel == NULL) | |
5512cf24 | 1126 | return -1; |
3f067dca | 1127 | |
1154c957 MH |
1128 | ret = __machine__create_kernel_maps(machine, kernel); |
1129 | dso__put(kernel); | |
1130 | if (ret < 0) | |
3f067dca ACM |
1131 | return -1; |
1132 | ||
1133 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1134 | if (machine__is_host(machine)) | |
1135 | pr_debug("Problems creating module maps, " | |
1136 | "continuing anyway...\n"); | |
1137 | else | |
1138 | pr_debug("Problems creating module maps for guest %d, " | |
1139 | "continuing anyway...\n", machine->pid); | |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | * Now that we have all the maps created, just set the ->end of them: | |
1144 | */ | |
1145 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
1146 | |
1147 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
1148 | addr)) { | |
1149 | machine__destroy_kernel_maps(machine); | |
1150 | return -1; | |
1151 | } | |
1152 | ||
3f067dca ACM |
1153 | return 0; |
1154 | } | |
1155 | ||
b0a7d1a0 ACM |
1156 | static void machine__set_kernel_mmap_len(struct machine *machine, |
1157 | union perf_event *event) | |
1158 | { | |
4552cf0f NK |
1159 | int i; |
1160 | ||
1161 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1162 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1163 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1164 | event->mmap.len); | |
1165 | /* | |
1166 | * Be a bit paranoid here, some perf.data file came with | |
1167 | * a zero sized synthesized MMAP event for the kernel. | |
1168 | */ | |
1169 | if (machine->vmlinux_maps[i]->end == 0) | |
1170 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1171 | } | |
b0a7d1a0 ACM |
1172 | } |
1173 | ||
8e0cf965 AH |
1174 | static bool machine__uses_kcore(struct machine *machine) |
1175 | { | |
1176 | struct dso *dso; | |
1177 | ||
3d39ac53 | 1178 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1179 | if (dso__is_kcore(dso)) |
1180 | return true; | |
1181 | } | |
1182 | ||
1183 | return false; | |
1184 | } | |
1185 | ||
b0a7d1a0 ACM |
1186 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1187 | union perf_event *event) | |
1188 | { | |
1189 | struct map *map; | |
1190 | char kmmap_prefix[PATH_MAX]; | |
1191 | enum dso_kernel_type kernel_type; | |
1192 | bool is_kernel_mmap; | |
1193 | ||
8e0cf965 AH |
1194 | /* If we have maps from kcore then we do not need or want any others */ |
1195 | if (machine__uses_kcore(machine)) | |
1196 | return 0; | |
1197 | ||
b0a7d1a0 ACM |
1198 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1199 | if (machine__is_host(machine)) | |
1200 | kernel_type = DSO_TYPE_KERNEL; | |
1201 | else | |
1202 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1203 | ||
1204 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1205 | kmmap_prefix, | |
1206 | strlen(kmmap_prefix) - 1) == 0; | |
1207 | if (event->mmap.filename[0] == '/' || | |
1208 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
9f2de315 ACM |
1209 | map = machine__findnew_module_map(machine, event->mmap.start, |
1210 | event->mmap.filename); | |
b0a7d1a0 ACM |
1211 | if (map == NULL) |
1212 | goto out_problem; | |
1213 | ||
b0a7d1a0 ACM |
1214 | map->end = map->start + event->mmap.len; |
1215 | } else if (is_kernel_mmap) { | |
1216 | const char *symbol_name = (event->mmap.filename + | |
1217 | strlen(kmmap_prefix)); | |
1218 | /* | |
1219 | * Should be there already, from the build-id table in | |
1220 | * the header. | |
1221 | */ | |
b837a8bd NK |
1222 | struct dso *kernel = NULL; |
1223 | struct dso *dso; | |
1224 | ||
e8807844 ACM |
1225 | pthread_rwlock_rdlock(&machine->dsos.lock); |
1226 | ||
3d39ac53 | 1227 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1228 | |
1229 | /* | |
1230 | * The cpumode passed to is_kernel_module is not the | |
1231 | * cpumode of *this* event. If we insist on passing | |
1232 | * correct cpumode to is_kernel_module, we should | |
1233 | * record the cpumode when we adding this dso to the | |
1234 | * linked list. | |
1235 | * | |
1236 | * However we don't really need passing correct | |
1237 | * cpumode. We know the correct cpumode must be kernel | |
1238 | * mode (if not, we should not link it onto kernel_dsos | |
1239 | * list). | |
1240 | * | |
1241 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1242 | * is_kernel_module() treats it as a kernel cpumode. | |
1243 | */ | |
1244 | ||
1245 | if (!dso->kernel || | |
1246 | is_kernel_module(dso->long_name, | |
1247 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1248 | continue; |
1249 | ||
1f121b03 | 1250 | |
b837a8bd NK |
1251 | kernel = dso; |
1252 | break; | |
1253 | } | |
1254 | ||
e8807844 ACM |
1255 | pthread_rwlock_unlock(&machine->dsos.lock); |
1256 | ||
b837a8bd | 1257 | if (kernel == NULL) |
aa7cc2ae | 1258 | kernel = machine__findnew_dso(machine, kmmap_prefix); |
b0a7d1a0 ACM |
1259 | if (kernel == NULL) |
1260 | goto out_problem; | |
1261 | ||
1262 | kernel->kernel = kernel_type; | |
d3a7c489 ACM |
1263 | if (__machine__create_kernel_maps(machine, kernel) < 0) { |
1264 | dso__put(kernel); | |
b0a7d1a0 | 1265 | goto out_problem; |
d3a7c489 | 1266 | } |
b0a7d1a0 | 1267 | |
330dfa22 NK |
1268 | if (strstr(kernel->long_name, "vmlinux")) |
1269 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1270 | |
b0a7d1a0 ACM |
1271 | machine__set_kernel_mmap_len(machine, event); |
1272 | ||
1273 | /* | |
1274 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1275 | * symbol. Effectively having zero here means that at record | |
1276 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1277 | */ | |
1278 | if (event->mmap.pgoff != 0) { | |
1279 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1280 | symbol_name, | |
1281 | event->mmap.pgoff); | |
1282 | } | |
1283 | ||
1284 | if (machine__is_default_guest(machine)) { | |
1285 | /* | |
1286 | * preload dso of guest kernel and modules | |
1287 | */ | |
a5e813c6 | 1288 | dso__load(kernel, machine__kernel_map(machine), NULL); |
b0a7d1a0 ACM |
1289 | } |
1290 | } | |
1291 | return 0; | |
1292 | out_problem: | |
1293 | return -1; | |
1294 | } | |
1295 | ||
5c5e854b | 1296 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1297 | union perf_event *event, |
1298 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1299 | { |
1300 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1301 | struct thread *thread; | |
1302 | struct map *map; | |
1303 | enum map_type type; | |
1304 | int ret = 0; | |
1305 | ||
1306 | if (dump_trace) | |
1307 | perf_event__fprintf_mmap2(event, stdout); | |
1308 | ||
1309 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1310 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1311 | ret = machine__process_kernel_mmap_event(machine, event); | |
1312 | if (ret < 0) | |
1313 | goto out_problem; | |
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1318 | event->mmap2.tid); |
5c5e854b SE |
1319 | if (thread == NULL) |
1320 | goto out_problem; | |
1321 | ||
1322 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1323 | type = MAP__VARIABLE; | |
1324 | else | |
1325 | type = MAP__FUNCTION; | |
1326 | ||
2a03068c | 1327 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1328 | event->mmap2.len, event->mmap2.pgoff, |
1329 | event->mmap2.pid, event->mmap2.maj, | |
1330 | event->mmap2.min, event->mmap2.ino, | |
1331 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1332 | event->mmap2.prot, |
1333 | event->mmap2.flags, | |
5835edda | 1334 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1335 | |
1336 | if (map == NULL) | |
b91fc39f | 1337 | goto out_problem_map; |
5c5e854b SE |
1338 | |
1339 | thread__insert_map(thread, map); | |
b91fc39f | 1340 | thread__put(thread); |
84c2cafa | 1341 | map__put(map); |
5c5e854b SE |
1342 | return 0; |
1343 | ||
b91fc39f ACM |
1344 | out_problem_map: |
1345 | thread__put(thread); | |
5c5e854b SE |
1346 | out_problem: |
1347 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1348 | return 0; | |
1349 | } | |
1350 | ||
162f0bef FW |
1351 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1352 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1353 | { |
1354 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1355 | struct thread *thread; | |
1356 | struct map *map; | |
bad40917 | 1357 | enum map_type type; |
b0a7d1a0 ACM |
1358 | int ret = 0; |
1359 | ||
1360 | if (dump_trace) | |
1361 | perf_event__fprintf_mmap(event, stdout); | |
1362 | ||
1363 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1364 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1365 | ret = machine__process_kernel_mmap_event(machine, event); | |
1366 | if (ret < 0) | |
1367 | goto out_problem; | |
1368 | return 0; | |
1369 | } | |
1370 | ||
314add6b | 1371 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1372 | event->mmap.tid); |
b0a7d1a0 ACM |
1373 | if (thread == NULL) |
1374 | goto out_problem; | |
bad40917 SE |
1375 | |
1376 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1377 | type = MAP__VARIABLE; | |
1378 | else | |
1379 | type = MAP__FUNCTION; | |
1380 | ||
2a03068c | 1381 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1382 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1383 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1384 | event->mmap.filename, |
5835edda | 1385 | type, thread); |
bad40917 | 1386 | |
b0a7d1a0 | 1387 | if (map == NULL) |
b91fc39f | 1388 | goto out_problem_map; |
b0a7d1a0 ACM |
1389 | |
1390 | thread__insert_map(thread, map); | |
b91fc39f | 1391 | thread__put(thread); |
84c2cafa | 1392 | map__put(map); |
b0a7d1a0 ACM |
1393 | return 0; |
1394 | ||
b91fc39f ACM |
1395 | out_problem_map: |
1396 | thread__put(thread); | |
b0a7d1a0 ACM |
1397 | out_problem: |
1398 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1399 | return 0; | |
1400 | } | |
1401 | ||
b91fc39f | 1402 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1403 | { |
f3b623b8 | 1404 | if (machine->last_match == th) |
0ceb8f6e | 1405 | machine->last_match = NULL; |
f3b623b8 | 1406 | |
59a51c1d | 1407 | BUG_ON(atomic_read(&th->refcnt) == 0); |
b91fc39f ACM |
1408 | if (lock) |
1409 | pthread_rwlock_wrlock(&machine->threads_lock); | |
0170b14f | 1410 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 1411 | RB_CLEAR_NODE(&th->rb_node); |
236a3bbd | 1412 | /* |
f3b623b8 ACM |
1413 | * Move it first to the dead_threads list, then drop the reference, |
1414 | * if this is the last reference, then the thread__delete destructor | |
1415 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd DA |
1416 | */ |
1417 | list_add_tail(&th->node, &machine->dead_threads); | |
b91fc39f ACM |
1418 | if (lock) |
1419 | pthread_rwlock_unlock(&machine->threads_lock); | |
f3b623b8 | 1420 | thread__put(th); |
236a3bbd DA |
1421 | } |
1422 | ||
b91fc39f ACM |
1423 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1424 | { | |
1425 | return __machine__remove_thread(machine, th, true); | |
1426 | } | |
1427 | ||
162f0bef FW |
1428 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1429 | struct perf_sample *sample) | |
b0a7d1a0 | 1430 | { |
d75e6097 JO |
1431 | struct thread *thread = machine__find_thread(machine, |
1432 | event->fork.pid, | |
1433 | event->fork.tid); | |
314add6b AH |
1434 | struct thread *parent = machine__findnew_thread(machine, |
1435 | event->fork.ppid, | |
1436 | event->fork.ptid); | |
b91fc39f | 1437 | int err = 0; |
b0a7d1a0 | 1438 | |
5cb73340 AH |
1439 | if (dump_trace) |
1440 | perf_event__fprintf_task(event, stdout); | |
1441 | ||
1442 | /* | |
1443 | * There may be an existing thread that is not actually the parent, | |
1444 | * either because we are processing events out of order, or because the | |
1445 | * (fork) event that would have removed the thread was lost. Assume the | |
1446 | * latter case and continue on as best we can. | |
1447 | */ | |
1448 | if (parent->pid_ != (pid_t)event->fork.ppid) { | |
1449 | dump_printf("removing erroneous parent thread %d/%d\n", | |
1450 | parent->pid_, parent->tid); | |
1451 | machine__remove_thread(machine, parent); | |
1452 | thread__put(parent); | |
1453 | parent = machine__findnew_thread(machine, event->fork.ppid, | |
1454 | event->fork.ptid); | |
1455 | } | |
1456 | ||
236a3bbd | 1457 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1458 | if (thread != NULL) { |
236a3bbd | 1459 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1460 | thread__put(thread); |
1461 | } | |
236a3bbd | 1462 | |
314add6b AH |
1463 | thread = machine__findnew_thread(machine, event->fork.pid, |
1464 | event->fork.tid); | |
b0a7d1a0 ACM |
1465 | |
1466 | if (thread == NULL || parent == NULL || | |
162f0bef | 1467 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 | 1468 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1469 | err = -1; |
b0a7d1a0 | 1470 | } |
b91fc39f ACM |
1471 | thread__put(thread); |
1472 | thread__put(parent); | |
b0a7d1a0 | 1473 | |
b91fc39f | 1474 | return err; |
b0a7d1a0 ACM |
1475 | } |
1476 | ||
162f0bef FW |
1477 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1478 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1479 | { |
d75e6097 JO |
1480 | struct thread *thread = machine__find_thread(machine, |
1481 | event->fork.pid, | |
1482 | event->fork.tid); | |
b0a7d1a0 ACM |
1483 | |
1484 | if (dump_trace) | |
1485 | perf_event__fprintf_task(event, stdout); | |
1486 | ||
b91fc39f | 1487 | if (thread != NULL) { |
236a3bbd | 1488 | thread__exited(thread); |
b91fc39f ACM |
1489 | thread__put(thread); |
1490 | } | |
b0a7d1a0 ACM |
1491 | |
1492 | return 0; | |
1493 | } | |
1494 | ||
162f0bef FW |
1495 | int machine__process_event(struct machine *machine, union perf_event *event, |
1496 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1497 | { |
1498 | int ret; | |
1499 | ||
1500 | switch (event->header.type) { | |
1501 | case PERF_RECORD_COMM: | |
162f0bef | 1502 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1503 | case PERF_RECORD_MMAP: |
162f0bef | 1504 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1505 | case PERF_RECORD_MMAP2: |
162f0bef | 1506 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1507 | case PERF_RECORD_FORK: |
162f0bef | 1508 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1509 | case PERF_RECORD_EXIT: |
162f0bef | 1510 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1511 | case PERF_RECORD_LOST: |
162f0bef | 1512 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
1513 | case PERF_RECORD_AUX: |
1514 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 | 1515 | case PERF_RECORD_ITRACE_START: |
ceb92913 | 1516 | ret = machine__process_itrace_start_event(machine, event); break; |
c4937a91 KL |
1517 | case PERF_RECORD_LOST_SAMPLES: |
1518 | ret = machine__process_lost_samples_event(machine, event, sample); break; | |
0286039f AH |
1519 | case PERF_RECORD_SWITCH: |
1520 | case PERF_RECORD_SWITCH_CPU_WIDE: | |
1521 | ret = machine__process_switch_event(machine, event); break; | |
b0a7d1a0 ACM |
1522 | default: |
1523 | ret = -1; | |
1524 | break; | |
1525 | } | |
1526 | ||
1527 | return ret; | |
1528 | } | |
3f067dca | 1529 | |
b21484f1 | 1530 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1531 | { |
b21484f1 | 1532 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1533 | return 1; |
3f067dca ACM |
1534 | return 0; |
1535 | } | |
1536 | ||
bb871a9c | 1537 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1538 | struct addr_map_symbol *ams, |
1539 | u64 ip) | |
1540 | { | |
1541 | struct addr_location al; | |
3f067dca ACM |
1542 | |
1543 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1544 | /* |
1545 | * We cannot use the header.misc hint to determine whether a | |
1546 | * branch stack address is user, kernel, guest, hypervisor. | |
1547 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1548 | * Thus, we have to try consecutively until we find a match | |
1549 | * or else, the symbol is unknown | |
1550 | */ | |
bb871a9c | 1551 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1552 | |
3f067dca ACM |
1553 | ams->addr = ip; |
1554 | ams->al_addr = al.addr; | |
1555 | ams->sym = al.sym; | |
1556 | ams->map = al.map; | |
1557 | } | |
1558 | ||
bb871a9c | 1559 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1560 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1561 | { | |
1562 | struct addr_location al; | |
1563 | ||
1564 | memset(&al, 0, sizeof(al)); | |
1565 | ||
bb871a9c | 1566 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1567 | if (al.map == NULL) { |
1568 | /* | |
1569 | * some shared data regions have execute bit set which puts | |
1570 | * their mapping in the MAP__FUNCTION type array. | |
1571 | * Check there as a fallback option before dropping the sample. | |
1572 | */ | |
bb871a9c | 1573 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1574 | } |
1575 | ||
98a3b32c SE |
1576 | ams->addr = addr; |
1577 | ams->al_addr = al.addr; | |
1578 | ams->sym = al.sym; | |
1579 | ams->map = al.map; | |
1580 | } | |
1581 | ||
e80faac0 ACM |
1582 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1583 | struct addr_location *al) | |
98a3b32c SE |
1584 | { |
1585 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1586 | ||
1587 | if (!mi) | |
1588 | return NULL; | |
1589 | ||
bb871a9c ACM |
1590 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1591 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1592 | mi->data_src.val = sample->data_src; |
1593 | ||
1594 | return mi; | |
1595 | } | |
1596 | ||
37592b8a AK |
1597 | static int add_callchain_ip(struct thread *thread, |
1598 | struct symbol **parent, | |
1599 | struct addr_location *root_al, | |
73dbcd65 | 1600 | u8 *cpumode, |
37592b8a AK |
1601 | u64 ip) |
1602 | { | |
1603 | struct addr_location al; | |
1604 | ||
1605 | al.filtered = 0; | |
1606 | al.sym = NULL; | |
73dbcd65 | 1607 | if (!cpumode) { |
8b7bad58 AK |
1608 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, |
1609 | ip, &al); | |
73dbcd65 | 1610 | } else { |
2e77784b KL |
1611 | if (ip >= PERF_CONTEXT_MAX) { |
1612 | switch (ip) { | |
1613 | case PERF_CONTEXT_HV: | |
73dbcd65 | 1614 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
1615 | break; |
1616 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 1617 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
1618 | break; |
1619 | case PERF_CONTEXT_USER: | |
73dbcd65 | 1620 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
1621 | break; |
1622 | default: | |
1623 | pr_debug("invalid callchain context: " | |
1624 | "%"PRId64"\n", (s64) ip); | |
1625 | /* | |
1626 | * It seems the callchain is corrupted. | |
1627 | * Discard all. | |
1628 | */ | |
1629 | callchain_cursor_reset(&callchain_cursor); | |
1630 | return 1; | |
1631 | } | |
1632 | return 0; | |
1633 | } | |
73dbcd65 DH |
1634 | thread__find_addr_location(thread, *cpumode, MAP__FUNCTION, |
1635 | ip, &al); | |
2e77784b KL |
1636 | } |
1637 | ||
37592b8a AK |
1638 | if (al.sym != NULL) { |
1639 | if (sort__has_parent && !*parent && | |
1640 | symbol__match_regex(al.sym, &parent_regex)) | |
1641 | *parent = al.sym; | |
1642 | else if (have_ignore_callees && root_al && | |
1643 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1644 | /* Treat this symbol as the root, | |
1645 | forgetting its callees. */ | |
1646 | *root_al = al; | |
1647 | callchain_cursor_reset(&callchain_cursor); | |
1648 | } | |
1649 | } | |
1650 | ||
b49a8fe5 NK |
1651 | if (symbol_conf.hide_unresolved && al.sym == NULL) |
1652 | return 0; | |
5550171b | 1653 | return callchain_cursor_append(&callchain_cursor, al.addr, al.map, al.sym); |
37592b8a AK |
1654 | } |
1655 | ||
644f2df2 ACM |
1656 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1657 | struct addr_location *al) | |
3f067dca | 1658 | { |
3f067dca | 1659 | unsigned int i; |
644f2df2 ACM |
1660 | const struct branch_stack *bs = sample->branch_stack; |
1661 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1662 | |
3f067dca ACM |
1663 | if (!bi) |
1664 | return NULL; | |
1665 | ||
1666 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1667 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1668 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1669 | bi[i].flags = bs->entries[i].flags; |
1670 | } | |
1671 | return bi; | |
1672 | } | |
1673 | ||
8b7bad58 AK |
1674 | #define CHASHSZ 127 |
1675 | #define CHASHBITS 7 | |
1676 | #define NO_ENTRY 0xff | |
1677 | ||
1678 | #define PERF_MAX_BRANCH_DEPTH 127 | |
1679 | ||
1680 | /* Remove loops. */ | |
1681 | static int remove_loops(struct branch_entry *l, int nr) | |
1682 | { | |
1683 | int i, j, off; | |
1684 | unsigned char chash[CHASHSZ]; | |
1685 | ||
1686 | memset(chash, NO_ENTRY, sizeof(chash)); | |
1687 | ||
1688 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
1689 | ||
1690 | for (i = 0; i < nr; i++) { | |
1691 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
1692 | ||
1693 | /* no collision handling for now */ | |
1694 | if (chash[h] == NO_ENTRY) { | |
1695 | chash[h] = i; | |
1696 | } else if (l[chash[h]].from == l[i].from) { | |
1697 | bool is_loop = true; | |
1698 | /* check if it is a real loop */ | |
1699 | off = 0; | |
1700 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
1701 | if (l[j].from != l[i + off].from) { | |
1702 | is_loop = false; | |
1703 | break; | |
1704 | } | |
1705 | if (is_loop) { | |
1706 | memmove(l + i, l + i + off, | |
1707 | (nr - (i + off)) * sizeof(*l)); | |
1708 | nr -= off; | |
1709 | } | |
1710 | } | |
1711 | } | |
1712 | return nr; | |
1713 | } | |
1714 | ||
384b6055 KL |
1715 | /* |
1716 | * Recolve LBR callstack chain sample | |
1717 | * Return: | |
1718 | * 1 on success get LBR callchain information | |
1719 | * 0 no available LBR callchain information, should try fp | |
1720 | * negative error code on other errors. | |
1721 | */ | |
1722 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
1723 | struct perf_sample *sample, | |
1724 | struct symbol **parent, | |
1725 | struct addr_location *root_al, | |
1726 | int max_stack) | |
3f067dca | 1727 | { |
384b6055 KL |
1728 | struct ip_callchain *chain = sample->callchain; |
1729 | int chain_nr = min(max_stack, (int)chain->nr); | |
73dbcd65 | 1730 | u8 cpumode = PERF_RECORD_MISC_USER; |
384b6055 KL |
1731 | int i, j, err; |
1732 | u64 ip; | |
1733 | ||
1734 | for (i = 0; i < chain_nr; i++) { | |
1735 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
1736 | break; | |
1737 | } | |
1738 | ||
1739 | /* LBR only affects the user callchain */ | |
1740 | if (i != chain_nr) { | |
1741 | struct branch_stack *lbr_stack = sample->branch_stack; | |
1742 | int lbr_nr = lbr_stack->nr; | |
1743 | /* | |
1744 | * LBR callstack can only get user call chain. | |
1745 | * The mix_chain_nr is kernel call chain | |
1746 | * number plus LBR user call chain number. | |
1747 | * i is kernel call chain number, | |
1748 | * 1 is PERF_CONTEXT_USER, | |
1749 | * lbr_nr + 1 is the user call chain number. | |
1750 | * For details, please refer to the comments | |
1751 | * in callchain__printf | |
1752 | */ | |
1753 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
1754 | ||
1755 | if (mix_chain_nr > PERF_MAX_STACK_DEPTH + PERF_MAX_BRANCH_DEPTH) { | |
1756 | pr_warning("corrupted callchain. skipping...\n"); | |
1757 | return 0; | |
1758 | } | |
1759 | ||
1760 | for (j = 0; j < mix_chain_nr; j++) { | |
1761 | if (callchain_param.order == ORDER_CALLEE) { | |
1762 | if (j < i + 1) | |
1763 | ip = chain->ips[j]; | |
1764 | else if (j > i + 1) | |
1765 | ip = lbr_stack->entries[j - i - 2].from; | |
1766 | else | |
1767 | ip = lbr_stack->entries[0].to; | |
1768 | } else { | |
1769 | if (j < lbr_nr) | |
1770 | ip = lbr_stack->entries[lbr_nr - j - 1].from; | |
1771 | else if (j > lbr_nr) | |
1772 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
1773 | else | |
1774 | ip = lbr_stack->entries[0].to; | |
1775 | } | |
1776 | ||
73dbcd65 | 1777 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
384b6055 KL |
1778 | if (err) |
1779 | return (err < 0) ? err : 0; | |
1780 | } | |
1781 | return 1; | |
1782 | } | |
1783 | ||
1784 | return 0; | |
1785 | } | |
1786 | ||
1787 | static int thread__resolve_callchain_sample(struct thread *thread, | |
1788 | struct perf_evsel *evsel, | |
1789 | struct perf_sample *sample, | |
1790 | struct symbol **parent, | |
1791 | struct addr_location *root_al, | |
1792 | int max_stack) | |
1793 | { | |
1794 | struct branch_stack *branch = sample->branch_stack; | |
1795 | struct ip_callchain *chain = sample->callchain; | |
91e95617 | 1796 | int chain_nr = min(max_stack, (int)chain->nr); |
73dbcd65 | 1797 | u8 cpumode = PERF_RECORD_MISC_USER; |
2e77784b | 1798 | int i, j, err; |
8b7bad58 AK |
1799 | int skip_idx = -1; |
1800 | int first_call = 0; | |
1801 | ||
384b6055 KL |
1802 | callchain_cursor_reset(&callchain_cursor); |
1803 | ||
1804 | if (has_branch_callstack(evsel)) { | |
1805 | err = resolve_lbr_callchain_sample(thread, sample, parent, | |
1806 | root_al, max_stack); | |
1807 | if (err) | |
1808 | return (err < 0) ? err : 0; | |
1809 | } | |
1810 | ||
8b7bad58 AK |
1811 | /* |
1812 | * Based on DWARF debug information, some architectures skip | |
1813 | * a callchain entry saved by the kernel. | |
1814 | */ | |
1815 | if (chain->nr < PERF_MAX_STACK_DEPTH) | |
1816 | skip_idx = arch_skip_callchain_idx(thread, chain); | |
3f067dca | 1817 | |
8b7bad58 AK |
1818 | /* |
1819 | * Add branches to call stack for easier browsing. This gives | |
1820 | * more context for a sample than just the callers. | |
1821 | * | |
1822 | * This uses individual histograms of paths compared to the | |
1823 | * aggregated histograms the normal LBR mode uses. | |
1824 | * | |
1825 | * Limitations for now: | |
1826 | * - No extra filters | |
1827 | * - No annotations (should annotate somehow) | |
1828 | */ | |
1829 | ||
1830 | if (branch && callchain_param.branch_callstack) { | |
1831 | int nr = min(max_stack, (int)branch->nr); | |
1832 | struct branch_entry be[nr]; | |
1833 | ||
1834 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
1835 | pr_warning("corrupted branch chain. skipping...\n"); | |
1836 | goto check_calls; | |
1837 | } | |
1838 | ||
1839 | for (i = 0; i < nr; i++) { | |
1840 | if (callchain_param.order == ORDER_CALLEE) { | |
1841 | be[i] = branch->entries[i]; | |
1842 | /* | |
1843 | * Check for overlap into the callchain. | |
1844 | * The return address is one off compared to | |
1845 | * the branch entry. To adjust for this | |
1846 | * assume the calling instruction is not longer | |
1847 | * than 8 bytes. | |
1848 | */ | |
1849 | if (i == skip_idx || | |
1850 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
1851 | first_call++; | |
1852 | else if (be[i].from < chain->ips[first_call] && | |
1853 | be[i].from >= chain->ips[first_call] - 8) | |
1854 | first_call++; | |
1855 | } else | |
1856 | be[i] = branch->entries[branch->nr - i - 1]; | |
1857 | } | |
1858 | ||
1859 | nr = remove_loops(be, nr); | |
1860 | ||
1861 | for (i = 0; i < nr; i++) { | |
1862 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1863 | NULL, be[i].to); |
8b7bad58 AK |
1864 | if (!err) |
1865 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1866 | NULL, be[i].from); |
8b7bad58 AK |
1867 | if (err == -EINVAL) |
1868 | break; | |
1869 | if (err) | |
1870 | return err; | |
1871 | } | |
1872 | chain_nr -= nr; | |
1873 | } | |
1874 | ||
1875 | check_calls: | |
0edd4533 | 1876 | if (chain->nr > PERF_MAX_STACK_DEPTH && (int)chain->nr > max_stack) { |
3f067dca ACM |
1877 | pr_warning("corrupted callchain. skipping...\n"); |
1878 | return 0; | |
1879 | } | |
1880 | ||
8b7bad58 | 1881 | for (i = first_call; i < chain_nr; i++) { |
3f067dca | 1882 | u64 ip; |
3f067dca ACM |
1883 | |
1884 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1885 | j = i; |
3f067dca | 1886 | else |
a60335ba SB |
1887 | j = chain->nr - i - 1; |
1888 | ||
1889 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1890 | if (j == skip_idx) | |
1891 | continue; | |
1892 | #endif | |
1893 | ip = chain->ips[j]; | |
3f067dca | 1894 | |
73dbcd65 | 1895 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
3f067dca | 1896 | |
3f067dca | 1897 | if (err) |
2e77784b | 1898 | return (err < 0) ? err : 0; |
3f067dca ACM |
1899 | } |
1900 | ||
1901 | return 0; | |
1902 | } | |
1903 | ||
1904 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1905 | { | |
1906 | struct callchain_cursor *cursor = arg; | |
b49a8fe5 NK |
1907 | |
1908 | if (symbol_conf.hide_unresolved && entry->sym == NULL) | |
1909 | return 0; | |
3f067dca ACM |
1910 | return callchain_cursor_append(cursor, entry->ip, |
1911 | entry->map, entry->sym); | |
1912 | } | |
1913 | ||
cc8b7c2b ACM |
1914 | int thread__resolve_callchain(struct thread *thread, |
1915 | struct perf_evsel *evsel, | |
1916 | struct perf_sample *sample, | |
1917 | struct symbol **parent, | |
1918 | struct addr_location *root_al, | |
1919 | int max_stack) | |
3f067dca | 1920 | { |
384b6055 KL |
1921 | int ret = thread__resolve_callchain_sample(thread, evsel, |
1922 | sample, parent, | |
1923 | root_al, max_stack); | |
3f067dca ACM |
1924 | if (ret) |
1925 | return ret; | |
1926 | ||
1927 | /* Can we do dwarf post unwind? */ | |
1928 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1929 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1930 | return 0; | |
1931 | ||
1932 | /* Bail out if nothing was captured. */ | |
1933 | if ((!sample->user_regs.regs) || | |
1934 | (!sample->user_stack.size)) | |
1935 | return 0; | |
1936 | ||
dd8c17a5 | 1937 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1938 | thread, sample, max_stack); |
3f067dca ACM |
1939 | |
1940 | } | |
35feee19 DA |
1941 | |
1942 | int machine__for_each_thread(struct machine *machine, | |
1943 | int (*fn)(struct thread *thread, void *p), | |
1944 | void *priv) | |
1945 | { | |
1946 | struct rb_node *nd; | |
1947 | struct thread *thread; | |
1948 | int rc = 0; | |
1949 | ||
1950 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1951 | thread = rb_entry(nd, struct thread, rb_node); | |
1952 | rc = fn(thread, priv); | |
1953 | if (rc != 0) | |
1954 | return rc; | |
1955 | } | |
1956 | ||
1957 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1958 | rc = fn(thread, priv); | |
1959 | if (rc != 0) | |
1960 | return rc; | |
1961 | } | |
1962 | return rc; | |
1963 | } | |
58d925dc | 1964 | |
a5499b37 AH |
1965 | int machines__for_each_thread(struct machines *machines, |
1966 | int (*fn)(struct thread *thread, void *p), | |
1967 | void *priv) | |
1968 | { | |
1969 | struct rb_node *nd; | |
1970 | int rc = 0; | |
1971 | ||
1972 | rc = machine__for_each_thread(&machines->host, fn, priv); | |
1973 | if (rc != 0) | |
1974 | return rc; | |
1975 | ||
1976 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
1977 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
1978 | ||
1979 | rc = machine__for_each_thread(machine, fn, priv); | |
1980 | if (rc != 0) | |
1981 | return rc; | |
1982 | } | |
1983 | return rc; | |
1984 | } | |
1985 | ||
a33fbd56 | 1986 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1987 | struct target *target, struct thread_map *threads, |
9d9cad76 KL |
1988 | perf_event__handler_t process, bool data_mmap, |
1989 | unsigned int proc_map_timeout) | |
58d925dc | 1990 | { |
602ad878 | 1991 | if (target__has_task(target)) |
9d9cad76 | 1992 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, proc_map_timeout); |
602ad878 | 1993 | else if (target__has_cpu(target)) |
9d9cad76 | 1994 | return perf_event__synthesize_threads(tool, process, machine, data_mmap, proc_map_timeout); |
58d925dc ACM |
1995 | /* command specified */ |
1996 | return 0; | |
1997 | } | |
b9d266ba AH |
1998 | |
1999 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
2000 | { | |
2001 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
2002 | return -1; | |
2003 | ||
2004 | return machine->current_tid[cpu]; | |
2005 | } | |
2006 | ||
2007 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
2008 | pid_t tid) | |
2009 | { | |
2010 | struct thread *thread; | |
2011 | ||
2012 | if (cpu < 0) | |
2013 | return -EINVAL; | |
2014 | ||
2015 | if (!machine->current_tid) { | |
2016 | int i; | |
2017 | ||
2018 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
2019 | if (!machine->current_tid) | |
2020 | return -ENOMEM; | |
2021 | for (i = 0; i < MAX_NR_CPUS; i++) | |
2022 | machine->current_tid[i] = -1; | |
2023 | } | |
2024 | ||
2025 | if (cpu >= MAX_NR_CPUS) { | |
2026 | pr_err("Requested CPU %d too large. ", cpu); | |
2027 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
2028 | return -EINVAL; | |
2029 | } | |
2030 | ||
2031 | machine->current_tid[cpu] = tid; | |
2032 | ||
2033 | thread = machine__findnew_thread(machine, pid, tid); | |
2034 | if (!thread) | |
2035 | return -ENOMEM; | |
2036 | ||
2037 | thread->cpu = cpu; | |
b91fc39f | 2038 | thread__put(thread); |
b9d266ba AH |
2039 | |
2040 | return 0; | |
2041 | } | |
fbe2af45 AH |
2042 | |
2043 | int machine__get_kernel_start(struct machine *machine) | |
2044 | { | |
a5e813c6 | 2045 | struct map *map = machine__kernel_map(machine); |
fbe2af45 AH |
2046 | int err = 0; |
2047 | ||
2048 | /* | |
2049 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
2050 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
2051 | * all addresses including kernel addresses are less than 2^32. In | |
2052 | * that case (32-bit system), if the kernel mapping is unknown, all | |
2053 | * addresses will be assumed to be in user space - see | |
2054 | * machine__kernel_ip(). | |
2055 | */ | |
2056 | machine->kernel_start = 1ULL << 63; | |
2057 | if (map) { | |
2058 | err = map__load(map, machine->symbol_filter); | |
2059 | if (map->start) | |
2060 | machine->kernel_start = map->start; | |
2061 | } | |
2062 | return err; | |
2063 | } | |
aa7cc2ae ACM |
2064 | |
2065 | struct dso *machine__findnew_dso(struct machine *machine, const char *filename) | |
2066 | { | |
e8807844 | 2067 | return dsos__findnew(&machine->dsos, filename); |
aa7cc2ae | 2068 | } |
c3168b0d ACM |
2069 | |
2070 | char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) | |
2071 | { | |
2072 | struct machine *machine = vmachine; | |
2073 | struct map *map; | |
2074 | struct symbol *sym = map_groups__find_symbol(&machine->kmaps, MAP__FUNCTION, *addrp, &map, NULL); | |
2075 | ||
2076 | if (sym == NULL) | |
2077 | return NULL; | |
2078 | ||
2079 | *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL; | |
2080 | *addrp = map->unmap_ip(map, sym->start); | |
2081 | return sym->name; | |
2082 | } |