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 | { | |
93b0ba3c | 28 | memset(machine, 0, sizeof(*machine)); |
11246c70 | 29 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 30 | RB_CLEAR_NODE(&machine->rb_node); |
3d39ac53 | 31 | dsos__init(&machine->dsos); |
69d2591a ACM |
32 | |
33 | machine->threads = RB_ROOT; | |
b91fc39f | 34 | pthread_rwlock_init(&machine->threads_lock, NULL); |
d2c11034 | 35 | machine->nr_threads = 0; |
69d2591a ACM |
36 | INIT_LIST_HEAD(&machine->dead_threads); |
37 | machine->last_match = NULL; | |
38 | ||
d027b640 | 39 | machine->vdso_info = NULL; |
4cde998d | 40 | machine->env = NULL; |
d027b640 | 41 | |
69d2591a ACM |
42 | machine->pid = pid; |
43 | ||
611a5ce8 | 44 | machine->symbol_filter = NULL; |
14bd6d20 | 45 | machine->id_hdr_size = 0; |
caf8a0d0 | 46 | machine->kptr_restrict_warned = false; |
cfe1c414 | 47 | machine->comm_exec = false; |
fbe2af45 | 48 | machine->kernel_start = 0; |
611a5ce8 | 49 | |
cc1121ab MH |
50 | memset(machine->vmlinux_maps, 0, sizeof(machine->vmlinux_maps)); |
51 | ||
69d2591a ACM |
52 | machine->root_dir = strdup(root_dir); |
53 | if (machine->root_dir == NULL) | |
54 | return -ENOMEM; | |
55 | ||
56 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 57 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 58 | pid); |
69d2591a ACM |
59 | char comm[64]; |
60 | ||
61 | if (thread == NULL) | |
62 | return -ENOMEM; | |
63 | ||
64 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 65 | thread__set_comm(thread, comm, 0); |
b91fc39f | 66 | thread__put(thread); |
69d2591a ACM |
67 | } |
68 | ||
b9d266ba AH |
69 | machine->current_tid = NULL; |
70 | ||
69d2591a ACM |
71 | return 0; |
72 | } | |
73 | ||
8fb598e5 DA |
74 | struct machine *machine__new_host(void) |
75 | { | |
76 | struct machine *machine = malloc(sizeof(*machine)); | |
77 | ||
78 | if (machine != NULL) { | |
79 | machine__init(machine, "", HOST_KERNEL_ID); | |
80 | ||
81 | if (machine__create_kernel_maps(machine) < 0) | |
82 | goto out_delete; | |
83 | } | |
84 | ||
85 | return machine; | |
86 | out_delete: | |
87 | free(machine); | |
88 | return NULL; | |
89 | } | |
90 | ||
d3a7c489 | 91 | static void dsos__purge(struct dsos *dsos) |
69d2591a ACM |
92 | { |
93 | struct dso *pos, *n; | |
94 | ||
e8807844 ACM |
95 | pthread_rwlock_wrlock(&dsos->lock); |
96 | ||
8fa7d87f | 97 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 98 | RB_CLEAR_NODE(&pos->rb_node); |
e266a753 | 99 | pos->root = NULL; |
d3a7c489 ACM |
100 | list_del_init(&pos->node); |
101 | dso__put(pos); | |
69d2591a | 102 | } |
e8807844 ACM |
103 | |
104 | pthread_rwlock_unlock(&dsos->lock); | |
d3a7c489 | 105 | } |
e8807844 | 106 | |
d3a7c489 ACM |
107 | static void dsos__exit(struct dsos *dsos) |
108 | { | |
109 | dsos__purge(dsos); | |
e8807844 | 110 | pthread_rwlock_destroy(&dsos->lock); |
69d2591a ACM |
111 | } |
112 | ||
3f067dca ACM |
113 | void machine__delete_threads(struct machine *machine) |
114 | { | |
b91fc39f | 115 | struct rb_node *nd; |
3f067dca | 116 | |
b91fc39f ACM |
117 | pthread_rwlock_wrlock(&machine->threads_lock); |
118 | nd = rb_first(&machine->threads); | |
3f067dca ACM |
119 | while (nd) { |
120 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
121 | ||
3f067dca | 122 | nd = rb_next(nd); |
b91fc39f | 123 | __machine__remove_thread(machine, t, false); |
3f067dca | 124 | } |
b91fc39f | 125 | pthread_rwlock_unlock(&machine->threads_lock); |
3f067dca ACM |
126 | } |
127 | ||
69d2591a ACM |
128 | void machine__exit(struct machine *machine) |
129 | { | |
ebe9729c | 130 | machine__destroy_kernel_maps(machine); |
69d2591a | 131 | map_groups__exit(&machine->kmaps); |
e8807844 | 132 | dsos__exit(&machine->dsos); |
9a4388c7 | 133 | machine__exit_vdso(machine); |
04662523 | 134 | zfree(&machine->root_dir); |
b9d266ba | 135 | zfree(&machine->current_tid); |
b91fc39f | 136 | pthread_rwlock_destroy(&machine->threads_lock); |
69d2591a ACM |
137 | } |
138 | ||
139 | void machine__delete(struct machine *machine) | |
140 | { | |
141 | machine__exit(machine); | |
142 | free(machine); | |
143 | } | |
144 | ||
876650e6 ACM |
145 | void machines__init(struct machines *machines) |
146 | { | |
147 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
148 | machines->guests = RB_ROOT; | |
611a5ce8 | 149 | machines->symbol_filter = NULL; |
876650e6 ACM |
150 | } |
151 | ||
152 | void machines__exit(struct machines *machines) | |
153 | { | |
154 | machine__exit(&machines->host); | |
155 | /* XXX exit guest */ | |
156 | } | |
157 | ||
158 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
159 | const char *root_dir) |
160 | { | |
876650e6 | 161 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
162 | struct rb_node *parent = NULL; |
163 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
164 | ||
165 | if (machine == NULL) | |
166 | return NULL; | |
167 | ||
168 | if (machine__init(machine, root_dir, pid) != 0) { | |
169 | free(machine); | |
170 | return NULL; | |
171 | } | |
172 | ||
611a5ce8 AH |
173 | machine->symbol_filter = machines->symbol_filter; |
174 | ||
69d2591a ACM |
175 | while (*p != NULL) { |
176 | parent = *p; | |
177 | pos = rb_entry(parent, struct machine, rb_node); | |
178 | if (pid < pos->pid) | |
179 | p = &(*p)->rb_left; | |
180 | else | |
181 | p = &(*p)->rb_right; | |
182 | } | |
183 | ||
184 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 185 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
186 | |
187 | return machine; | |
188 | } | |
189 | ||
611a5ce8 AH |
190 | void machines__set_symbol_filter(struct machines *machines, |
191 | symbol_filter_t symbol_filter) | |
192 | { | |
193 | struct rb_node *nd; | |
194 | ||
195 | machines->symbol_filter = symbol_filter; | |
196 | machines->host.symbol_filter = symbol_filter; | |
197 | ||
198 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
199 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
200 | ||
201 | machine->symbol_filter = symbol_filter; | |
202 | } | |
203 | } | |
204 | ||
cfe1c414 AH |
205 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
206 | { | |
207 | struct rb_node *nd; | |
208 | ||
209 | machines->host.comm_exec = comm_exec; | |
210 | ||
211 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
212 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
213 | ||
214 | machine->comm_exec = comm_exec; | |
215 | } | |
216 | } | |
217 | ||
876650e6 | 218 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 219 | { |
876650e6 | 220 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
221 | struct rb_node *parent = NULL; |
222 | struct machine *machine; | |
223 | struct machine *default_machine = NULL; | |
224 | ||
876650e6 ACM |
225 | if (pid == HOST_KERNEL_ID) |
226 | return &machines->host; | |
227 | ||
69d2591a ACM |
228 | while (*p != NULL) { |
229 | parent = *p; | |
230 | machine = rb_entry(parent, struct machine, rb_node); | |
231 | if (pid < machine->pid) | |
232 | p = &(*p)->rb_left; | |
233 | else if (pid > machine->pid) | |
234 | p = &(*p)->rb_right; | |
235 | else | |
236 | return machine; | |
237 | if (!machine->pid) | |
238 | default_machine = machine; | |
239 | } | |
240 | ||
241 | return default_machine; | |
242 | } | |
243 | ||
876650e6 | 244 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
245 | { |
246 | char path[PATH_MAX]; | |
247 | const char *root_dir = ""; | |
248 | struct machine *machine = machines__find(machines, pid); | |
249 | ||
250 | if (machine && (machine->pid == pid)) | |
251 | goto out; | |
252 | ||
253 | if ((pid != HOST_KERNEL_ID) && | |
254 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
255 | (symbol_conf.guestmount)) { | |
256 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
257 | if (access(path, R_OK)) { | |
258 | static struct strlist *seen; | |
259 | ||
260 | if (!seen) | |
4a77e218 | 261 | seen = strlist__new(NULL, NULL); |
69d2591a ACM |
262 | |
263 | if (!strlist__has_entry(seen, path)) { | |
264 | pr_err("Can't access file %s\n", path); | |
265 | strlist__add(seen, path); | |
266 | } | |
267 | machine = NULL; | |
268 | goto out; | |
269 | } | |
270 | root_dir = path; | |
271 | } | |
272 | ||
273 | machine = machines__add(machines, pid, root_dir); | |
274 | out: | |
275 | return machine; | |
276 | } | |
277 | ||
876650e6 ACM |
278 | void machines__process_guests(struct machines *machines, |
279 | machine__process_t process, void *data) | |
69d2591a ACM |
280 | { |
281 | struct rb_node *nd; | |
282 | ||
876650e6 | 283 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
284 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
285 | process(pos, data); | |
286 | } | |
287 | } | |
288 | ||
289 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
290 | { | |
291 | if (machine__is_host(machine)) | |
292 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
293 | else if (machine__is_default_guest(machine)) | |
294 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
295 | else { | |
296 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
297 | machine->pid); | |
298 | } | |
299 | ||
300 | return bf; | |
301 | } | |
302 | ||
876650e6 | 303 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
304 | { |
305 | struct rb_node *node; | |
306 | struct machine *machine; | |
307 | ||
876650e6 ACM |
308 | machines->host.id_hdr_size = id_hdr_size; |
309 | ||
310 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
311 | machine = rb_entry(node, struct machine, rb_node); |
312 | machine->id_hdr_size = id_hdr_size; | |
313 | } | |
314 | ||
315 | return; | |
316 | } | |
317 | ||
29ce3612 AH |
318 | static void machine__update_thread_pid(struct machine *machine, |
319 | struct thread *th, pid_t pid) | |
320 | { | |
321 | struct thread *leader; | |
322 | ||
323 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
324 | return; | |
325 | ||
326 | th->pid_ = pid; | |
327 | ||
328 | if (th->pid_ == th->tid) | |
329 | return; | |
330 | ||
b91fc39f | 331 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
332 | if (!leader) |
333 | goto out_err; | |
334 | ||
335 | if (!leader->mg) | |
11246c70 | 336 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
337 | |
338 | if (!leader->mg) | |
339 | goto out_err; | |
340 | ||
341 | if (th->mg == leader->mg) | |
342 | return; | |
343 | ||
344 | if (th->mg) { | |
345 | /* | |
346 | * Maps are created from MMAP events which provide the pid and | |
347 | * tid. Consequently there never should be any maps on a thread | |
348 | * with an unknown pid. Just print an error if there are. | |
349 | */ | |
350 | if (!map_groups__empty(th->mg)) | |
351 | pr_err("Discarding thread maps for %d:%d\n", | |
352 | th->pid_, th->tid); | |
8e160b2e | 353 | map_groups__put(th->mg); |
29ce3612 AH |
354 | } |
355 | ||
356 | th->mg = map_groups__get(leader->mg); | |
abd82868 ACM |
357 | out_put: |
358 | thread__put(leader); | |
29ce3612 | 359 | return; |
29ce3612 AH |
360 | out_err: |
361 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
abd82868 | 362 | goto out_put; |
29ce3612 AH |
363 | } |
364 | ||
abd82868 | 365 | /* |
bd1a0be5 | 366 | * Caller must eventually drop thread->refcnt returned with a successful |
abd82868 ACM |
367 | * lookup/new thread inserted. |
368 | */ | |
b91fc39f ACM |
369 | static struct thread *____machine__findnew_thread(struct machine *machine, |
370 | pid_t pid, pid_t tid, | |
371 | bool create) | |
9d2f8e22 ACM |
372 | { |
373 | struct rb_node **p = &machine->threads.rb_node; | |
374 | struct rb_node *parent = NULL; | |
375 | struct thread *th; | |
376 | ||
377 | /* | |
38051234 | 378 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
379 | * so most of the time we dont have to look up |
380 | * the full rbtree: | |
381 | */ | |
29ce3612 | 382 | th = machine->last_match; |
f3b623b8 ACM |
383 | if (th != NULL) { |
384 | if (th->tid == tid) { | |
385 | machine__update_thread_pid(machine, th, pid); | |
abd82868 | 386 | return thread__get(th); |
f3b623b8 ACM |
387 | } |
388 | ||
0ceb8f6e | 389 | machine->last_match = NULL; |
99d725fc | 390 | } |
9d2f8e22 ACM |
391 | |
392 | while (*p != NULL) { | |
393 | parent = *p; | |
394 | th = rb_entry(parent, struct thread, rb_node); | |
395 | ||
38051234 | 396 | if (th->tid == tid) { |
0ceb8f6e | 397 | machine->last_match = th; |
29ce3612 | 398 | machine__update_thread_pid(machine, th, pid); |
abd82868 | 399 | return thread__get(th); |
9d2f8e22 ACM |
400 | } |
401 | ||
38051234 | 402 | if (tid < th->tid) |
9d2f8e22 ACM |
403 | p = &(*p)->rb_left; |
404 | else | |
405 | p = &(*p)->rb_right; | |
406 | } | |
407 | ||
408 | if (!create) | |
409 | return NULL; | |
410 | ||
99d725fc | 411 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
412 | if (th != NULL) { |
413 | rb_link_node(&th->rb_node, parent, p); | |
414 | rb_insert_color(&th->rb_node, &machine->threads); | |
cddcef60 JO |
415 | |
416 | /* | |
417 | * We have to initialize map_groups separately | |
418 | * after rb tree is updated. | |
419 | * | |
420 | * The reason is that we call machine__findnew_thread | |
421 | * within thread__init_map_groups to find the thread | |
422 | * leader and that would screwed the rb tree. | |
423 | */ | |
418029b7 | 424 | if (thread__init_map_groups(th, machine)) { |
0170b14f | 425 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 426 | RB_CLEAR_NODE(&th->rb_node); |
abd82868 | 427 | thread__put(th); |
cddcef60 | 428 | return NULL; |
418029b7 | 429 | } |
f3b623b8 ACM |
430 | /* |
431 | * It is now in the rbtree, get a ref | |
432 | */ | |
433 | thread__get(th); | |
0ceb8f6e | 434 | machine->last_match = th; |
d2c11034 | 435 | ++machine->nr_threads; |
9d2f8e22 ACM |
436 | } |
437 | ||
438 | return th; | |
439 | } | |
440 | ||
b91fc39f ACM |
441 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
442 | { | |
443 | return ____machine__findnew_thread(machine, pid, tid, true); | |
444 | } | |
445 | ||
314add6b AH |
446 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
447 | pid_t tid) | |
9d2f8e22 | 448 | { |
b91fc39f ACM |
449 | struct thread *th; |
450 | ||
451 | pthread_rwlock_wrlock(&machine->threads_lock); | |
abd82868 | 452 | th = __machine__findnew_thread(machine, pid, tid); |
b91fc39f ACM |
453 | pthread_rwlock_unlock(&machine->threads_lock); |
454 | return th; | |
9d2f8e22 ACM |
455 | } |
456 | ||
d75e6097 JO |
457 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
458 | pid_t tid) | |
9d2f8e22 | 459 | { |
b91fc39f ACM |
460 | struct thread *th; |
461 | pthread_rwlock_rdlock(&machine->threads_lock); | |
abd82868 | 462 | th = ____machine__findnew_thread(machine, pid, tid, false); |
b91fc39f ACM |
463 | pthread_rwlock_unlock(&machine->threads_lock); |
464 | return th; | |
9d2f8e22 | 465 | } |
b0a7d1a0 | 466 | |
cfe1c414 AH |
467 | struct comm *machine__thread_exec_comm(struct machine *machine, |
468 | struct thread *thread) | |
469 | { | |
470 | if (machine->comm_exec) | |
471 | return thread__exec_comm(thread); | |
472 | else | |
473 | return thread__comm(thread); | |
474 | } | |
475 | ||
162f0bef FW |
476 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
477 | struct perf_sample *sample) | |
b0a7d1a0 | 478 | { |
314add6b AH |
479 | struct thread *thread = machine__findnew_thread(machine, |
480 | event->comm.pid, | |
481 | event->comm.tid); | |
65de51f9 | 482 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 483 | int err = 0; |
b0a7d1a0 | 484 | |
cfe1c414 AH |
485 | if (exec) |
486 | machine->comm_exec = true; | |
487 | ||
b0a7d1a0 ACM |
488 | if (dump_trace) |
489 | perf_event__fprintf_comm(event, stdout); | |
490 | ||
65de51f9 AH |
491 | if (thread == NULL || |
492 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 493 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 494 | err = -1; |
b0a7d1a0 ACM |
495 | } |
496 | ||
b91fc39f ACM |
497 | thread__put(thread); |
498 | ||
499 | return err; | |
b0a7d1a0 ACM |
500 | } |
501 | ||
502 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 503 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
504 | { |
505 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
506 | event->lost.id, event->lost.lost); | |
507 | return 0; | |
508 | } | |
509 | ||
c4937a91 KL |
510 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
511 | union perf_event *event, struct perf_sample *sample) | |
512 | { | |
513 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n", | |
514 | sample->id, event->lost_samples.lost); | |
515 | return 0; | |
516 | } | |
517 | ||
9f2de315 ACM |
518 | static struct dso *machine__findnew_module_dso(struct machine *machine, |
519 | struct kmod_path *m, | |
520 | const char *filename) | |
da17ea33 JO |
521 | { |
522 | struct dso *dso; | |
da17ea33 | 523 | |
e8807844 ACM |
524 | pthread_rwlock_wrlock(&machine->dsos.lock); |
525 | ||
526 | dso = __dsos__find(&machine->dsos, m->name, true); | |
da17ea33 | 527 | if (!dso) { |
e8807844 | 528 | dso = __dsos__addnew(&machine->dsos, m->name); |
da17ea33 | 529 | if (dso == NULL) |
e8807844 | 530 | goto out_unlock; |
da17ea33 JO |
531 | |
532 | if (machine__is_host(machine)) | |
533 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
534 | else | |
535 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
536 | ||
537 | /* _KMODULE_COMP should be next to _KMODULE */ | |
ca33380a | 538 | if (m->kmod && m->comp) |
da17ea33 | 539 | dso->symtab_type++; |
ca33380a JO |
540 | |
541 | dso__set_short_name(dso, strdup(m->name), true); | |
542 | dso__set_long_name(dso, strdup(filename), true); | |
da17ea33 JO |
543 | } |
544 | ||
d3a7c489 | 545 | dso__get(dso); |
e8807844 ACM |
546 | out_unlock: |
547 | pthread_rwlock_unlock(&machine->dsos.lock); | |
da17ea33 JO |
548 | return dso; |
549 | } | |
550 | ||
4a96f7a0 AH |
551 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
552 | union perf_event *event) | |
553 | { | |
554 | if (dump_trace) | |
555 | perf_event__fprintf_aux(event, stdout); | |
556 | return 0; | |
557 | } | |
558 | ||
0ad21f68 AH |
559 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
560 | union perf_event *event) | |
561 | { | |
562 | if (dump_trace) | |
563 | perf_event__fprintf_itrace_start(event, stdout); | |
564 | return 0; | |
565 | } | |
566 | ||
0286039f AH |
567 | int machine__process_switch_event(struct machine *machine __maybe_unused, |
568 | union perf_event *event) | |
569 | { | |
570 | if (dump_trace) | |
571 | perf_event__fprintf_switch(event, stdout); | |
572 | return 0; | |
573 | } | |
574 | ||
c03d5184 WN |
575 | static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename) |
576 | { | |
577 | const char *dup_filename; | |
578 | ||
579 | if (!filename || !dso || !dso->long_name) | |
580 | return; | |
581 | if (dso->long_name[0] != '[') | |
582 | return; | |
583 | if (!strchr(filename, '/')) | |
584 | return; | |
585 | ||
586 | dup_filename = strdup(filename); | |
587 | if (!dup_filename) | |
588 | return; | |
589 | ||
5dcf16df | 590 | dso__set_long_name(dso, dup_filename, true); |
c03d5184 WN |
591 | } |
592 | ||
9f2de315 ACM |
593 | struct map *machine__findnew_module_map(struct machine *machine, u64 start, |
594 | const char *filename) | |
3f067dca | 595 | { |
ca33380a | 596 | struct map *map = NULL; |
566c69c3 | 597 | struct dso *dso = NULL; |
ca33380a | 598 | struct kmod_path m; |
3f067dca | 599 | |
ca33380a | 600 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
601 | return NULL; |
602 | ||
bc84f464 JO |
603 | map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, |
604 | m.name); | |
c03d5184 WN |
605 | if (map) { |
606 | /* | |
607 | * If the map's dso is an offline module, give dso__load() | |
608 | * a chance to find the file path of that module by fixing | |
609 | * long_name. | |
610 | */ | |
611 | dso__adjust_kmod_long_name(map->dso, filename); | |
bc84f464 | 612 | goto out; |
c03d5184 | 613 | } |
bc84f464 | 614 | |
9f2de315 | 615 | dso = machine__findnew_module_dso(machine, &m, filename); |
ca33380a JO |
616 | if (dso == NULL) |
617 | goto out; | |
618 | ||
3f067dca ACM |
619 | map = map__new2(start, dso, MAP__FUNCTION); |
620 | if (map == NULL) | |
ca33380a | 621 | goto out; |
3f067dca | 622 | |
3f067dca | 623 | map_groups__insert(&machine->kmaps, map); |
ca33380a | 624 | |
9afcb420 MH |
625 | /* Put the map here because map_groups__insert alread got it */ |
626 | map__put(map); | |
ca33380a | 627 | out: |
566c69c3 MH |
628 | /* put the dso here, corresponding to machine__findnew_module_dso */ |
629 | dso__put(dso); | |
ca33380a | 630 | free(m.name); |
3f067dca ACM |
631 | return map; |
632 | } | |
633 | ||
876650e6 | 634 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
635 | { |
636 | struct rb_node *nd; | |
3d39ac53 | 637 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 638 | |
876650e6 | 639 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 640 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 641 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
642 | } |
643 | ||
644 | return ret; | |
645 | } | |
646 | ||
8fa7d87f | 647 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
648 | bool (skip)(struct dso *dso, int parm), int parm) |
649 | { | |
3d39ac53 | 650 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
651 | } |
652 | ||
876650e6 | 653 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
654 | bool (skip)(struct dso *dso, int parm), int parm) |
655 | { | |
656 | struct rb_node *nd; | |
876650e6 | 657 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 658 | |
876650e6 | 659 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
660 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
661 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
662 | } | |
663 | return ret; | |
664 | } | |
665 | ||
666 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
667 | { | |
668 | int i; | |
669 | size_t printed = 0; | |
a5e813c6 | 670 | struct dso *kdso = machine__kernel_map(machine)->dso; |
3f067dca ACM |
671 | |
672 | if (kdso->has_build_id) { | |
673 | char filename[PATH_MAX]; | |
674 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
675 | printed += fprintf(fp, "[0] %s\n", filename); | |
676 | } | |
677 | ||
678 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
679 | printed += fprintf(fp, "[%d] %s\n", | |
680 | i + kdso->has_build_id, vmlinux_path[i]); | |
681 | ||
682 | return printed; | |
683 | } | |
684 | ||
685 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
686 | { | |
d2c11034 | 687 | size_t ret; |
3f067dca ACM |
688 | struct rb_node *nd; |
689 | ||
b91fc39f ACM |
690 | pthread_rwlock_rdlock(&machine->threads_lock); |
691 | ||
d2c11034 ACM |
692 | ret = fprintf(fp, "Threads: %u\n", machine->nr_threads); |
693 | ||
3f067dca ACM |
694 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { |
695 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
696 | ||
697 | ret += thread__fprintf(pos, fp); | |
698 | } | |
699 | ||
b91fc39f ACM |
700 | pthread_rwlock_unlock(&machine->threads_lock); |
701 | ||
3f067dca ACM |
702 | return ret; |
703 | } | |
704 | ||
705 | static struct dso *machine__get_kernel(struct machine *machine) | |
706 | { | |
707 | const char *vmlinux_name = NULL; | |
708 | struct dso *kernel; | |
709 | ||
710 | if (machine__is_host(machine)) { | |
711 | vmlinux_name = symbol_conf.vmlinux_name; | |
712 | if (!vmlinux_name) | |
0a77582f | 713 | vmlinux_name = DSO__NAME_KALLSYMS; |
3f067dca | 714 | |
459ce518 ACM |
715 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
716 | "[kernel]", DSO_TYPE_KERNEL); | |
3f067dca ACM |
717 | } else { |
718 | char bf[PATH_MAX]; | |
719 | ||
720 | if (machine__is_default_guest(machine)) | |
721 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
722 | if (!vmlinux_name) | |
723 | vmlinux_name = machine__mmap_name(machine, bf, | |
724 | sizeof(bf)); | |
725 | ||
459ce518 ACM |
726 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
727 | "[guest.kernel]", | |
728 | DSO_TYPE_GUEST_KERNEL); | |
3f067dca ACM |
729 | } |
730 | ||
731 | if (kernel != NULL && (!kernel->has_build_id)) | |
732 | dso__read_running_kernel_build_id(kernel, machine); | |
733 | ||
734 | return kernel; | |
735 | } | |
736 | ||
737 | struct process_args { | |
738 | u64 start; | |
739 | }; | |
740 | ||
15a0a870 AH |
741 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
742 | size_t bufsz) | |
743 | { | |
744 | if (machine__is_default_guest(machine)) | |
745 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
746 | else | |
747 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
748 | } | |
749 | ||
a93f0e55 SQ |
750 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
751 | ||
752 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
753 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
754 | * symbol_name if it's not that important. | |
755 | */ | |
4b99375b AH |
756 | static u64 machine__get_running_kernel_start(struct machine *machine, |
757 | const char **symbol_name) | |
3f067dca | 758 | { |
15a0a870 | 759 | char filename[PATH_MAX]; |
a93f0e55 SQ |
760 | int i; |
761 | const char *name; | |
762 | u64 addr = 0; | |
3f067dca | 763 | |
15a0a870 | 764 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
765 | |
766 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
767 | return 0; | |
768 | ||
a93f0e55 SQ |
769 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
770 | addr = kallsyms__get_function_start(filename, name); | |
771 | if (addr) | |
772 | break; | |
773 | } | |
774 | ||
775 | if (symbol_name) | |
776 | *symbol_name = name; | |
3f067dca | 777 | |
a93f0e55 | 778 | return addr; |
3f067dca ACM |
779 | } |
780 | ||
781 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
782 | { | |
783 | enum map_type type; | |
4b99375b | 784 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca | 785 | |
cc1121ab MH |
786 | /* In case of renewal the kernel map, destroy previous one */ |
787 | machine__destroy_kernel_maps(machine); | |
788 | ||
3f067dca ACM |
789 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
790 | struct kmap *kmap; | |
77e65977 | 791 | struct map *map; |
3f067dca ACM |
792 | |
793 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
794 | if (machine->vmlinux_maps[type] == NULL) | |
795 | return -1; | |
796 | ||
797 | machine->vmlinux_maps[type]->map_ip = | |
798 | machine->vmlinux_maps[type]->unmap_ip = | |
799 | identity__map_ip; | |
a5e813c6 | 800 | map = __machine__kernel_map(machine, type); |
77e65977 | 801 | kmap = map__kmap(map); |
ba92732e WN |
802 | if (!kmap) |
803 | return -1; | |
804 | ||
3f067dca | 805 | kmap->kmaps = &machine->kmaps; |
77e65977 | 806 | map_groups__insert(&machine->kmaps, map); |
3f067dca ACM |
807 | } |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | void machine__destroy_kernel_maps(struct machine *machine) | |
813 | { | |
814 | enum map_type type; | |
815 | ||
816 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
817 | struct kmap *kmap; | |
a5e813c6 | 818 | struct map *map = __machine__kernel_map(machine, type); |
3f067dca | 819 | |
77e65977 | 820 | if (map == NULL) |
3f067dca ACM |
821 | continue; |
822 | ||
77e65977 ACM |
823 | kmap = map__kmap(map); |
824 | map_groups__remove(&machine->kmaps, map); | |
ba92732e | 825 | if (kmap && kmap->ref_reloc_sym) { |
3f067dca ACM |
826 | /* |
827 | * ref_reloc_sym is shared among all maps, so free just | |
828 | * on one of them. | |
829 | */ | |
830 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
831 | zfree((char **)&kmap->ref_reloc_sym->name); |
832 | zfree(&kmap->ref_reloc_sym); | |
833 | } else | |
834 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
835 | } |
836 | ||
e96e4078 | 837 | map__put(machine->vmlinux_maps[type]); |
3f067dca ACM |
838 | machine->vmlinux_maps[type] = NULL; |
839 | } | |
840 | } | |
841 | ||
876650e6 | 842 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
843 | { |
844 | int ret = 0; | |
845 | struct dirent **namelist = NULL; | |
846 | int i, items = 0; | |
847 | char path[PATH_MAX]; | |
848 | pid_t pid; | |
849 | char *endp; | |
850 | ||
851 | if (symbol_conf.default_guest_vmlinux_name || | |
852 | symbol_conf.default_guest_modules || | |
853 | symbol_conf.default_guest_kallsyms) { | |
854 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
855 | } | |
856 | ||
857 | if (symbol_conf.guestmount) { | |
858 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
859 | if (items <= 0) | |
860 | return -ENOENT; | |
861 | for (i = 0; i < items; i++) { | |
862 | if (!isdigit(namelist[i]->d_name[0])) { | |
863 | /* Filter out . and .. */ | |
864 | continue; | |
865 | } | |
866 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
867 | if ((*endp != '\0') || | |
868 | (endp == namelist[i]->d_name) || | |
869 | (errno == ERANGE)) { | |
870 | pr_debug("invalid directory (%s). Skipping.\n", | |
871 | namelist[i]->d_name); | |
872 | continue; | |
873 | } | |
874 | sprintf(path, "%s/%s/proc/kallsyms", | |
875 | symbol_conf.guestmount, | |
876 | namelist[i]->d_name); | |
877 | ret = access(path, R_OK); | |
878 | if (ret) { | |
879 | pr_debug("Can't access file %s\n", path); | |
880 | goto failure; | |
881 | } | |
882 | machines__create_kernel_maps(machines, pid); | |
883 | } | |
884 | failure: | |
885 | free(namelist); | |
886 | } | |
887 | ||
888 | return ret; | |
889 | } | |
890 | ||
876650e6 | 891 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 892 | { |
876650e6 ACM |
893 | struct rb_node *next = rb_first(&machines->guests); |
894 | ||
895 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
896 | |
897 | while (next) { | |
898 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
899 | ||
900 | next = rb_next(&pos->rb_node); | |
876650e6 | 901 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
902 | machine__delete(pos); |
903 | } | |
904 | } | |
905 | ||
876650e6 | 906 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
907 | { |
908 | struct machine *machine = machines__findnew(machines, pid); | |
909 | ||
910 | if (machine == NULL) | |
911 | return -1; | |
912 | ||
913 | return machine__create_kernel_maps(machine); | |
914 | } | |
915 | ||
e02092b9 ACM |
916 | int __machine__load_kallsyms(struct machine *machine, const char *filename, |
917 | enum map_type type, bool no_kcore, symbol_filter_t filter) | |
3f067dca | 918 | { |
a5e813c6 | 919 | struct map *map = machine__kernel_map(machine); |
e02092b9 | 920 | int ret = __dso__load_kallsyms(map->dso, filename, map, no_kcore, filter); |
3f067dca ACM |
921 | |
922 | if (ret > 0) { | |
923 | dso__set_loaded(map->dso, type); | |
924 | /* | |
925 | * Since /proc/kallsyms will have multiple sessions for the | |
926 | * kernel, with modules between them, fixup the end of all | |
927 | * sections. | |
928 | */ | |
929 | __map_groups__fixup_end(&machine->kmaps, type); | |
930 | } | |
931 | ||
932 | return ret; | |
933 | } | |
934 | ||
e02092b9 ACM |
935 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
936 | enum map_type type, symbol_filter_t filter) | |
937 | { | |
938 | return __machine__load_kallsyms(machine, filename, type, false, filter); | |
939 | } | |
940 | ||
3f067dca ACM |
941 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, |
942 | symbol_filter_t filter) | |
943 | { | |
a5e813c6 | 944 | struct map *map = machine__kernel_map(machine); |
3f067dca ACM |
945 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
946 | ||
39b12f78 | 947 | if (ret > 0) |
3f067dca | 948 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
949 | |
950 | return ret; | |
951 | } | |
952 | ||
953 | static void map_groups__fixup_end(struct map_groups *mg) | |
954 | { | |
955 | int i; | |
956 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
957 | __map_groups__fixup_end(mg, i); | |
958 | } | |
959 | ||
960 | static char *get_kernel_version(const char *root_dir) | |
961 | { | |
962 | char version[PATH_MAX]; | |
963 | FILE *file; | |
964 | char *name, *tmp; | |
965 | const char *prefix = "Linux version "; | |
966 | ||
967 | sprintf(version, "%s/proc/version", root_dir); | |
968 | file = fopen(version, "r"); | |
969 | if (!file) | |
970 | return NULL; | |
971 | ||
972 | version[0] = '\0'; | |
973 | tmp = fgets(version, sizeof(version), file); | |
974 | fclose(file); | |
975 | ||
976 | name = strstr(version, prefix); | |
977 | if (!name) | |
978 | return NULL; | |
979 | name += strlen(prefix); | |
980 | tmp = strchr(name, ' '); | |
981 | if (tmp) | |
982 | *tmp = '\0'; | |
983 | ||
984 | return strdup(name); | |
985 | } | |
986 | ||
bb58a8a4 JO |
987 | static bool is_kmod_dso(struct dso *dso) |
988 | { | |
989 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
990 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
991 | } | |
992 | ||
993 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
994 | struct kmod_path *m) | |
995 | { | |
996 | struct map *map; | |
997 | char *long_name; | |
998 | ||
999 | map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name); | |
1000 | if (map == NULL) | |
1001 | return 0; | |
1002 | ||
1003 | long_name = strdup(path); | |
1004 | if (long_name == NULL) | |
1005 | return -ENOMEM; | |
1006 | ||
1007 | dso__set_long_name(map->dso, long_name, true); | |
1008 | dso__kernel_module_get_build_id(map->dso, ""); | |
1009 | ||
1010 | /* | |
1011 | * Full name could reveal us kmod compression, so | |
1012 | * we need to update the symtab_type if needed. | |
1013 | */ | |
1014 | if (m->comp && is_kmod_dso(map->dso)) | |
1015 | map->dso->symtab_type++; | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
3f067dca | 1020 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 1021 | const char *dir_name, int depth) |
3f067dca ACM |
1022 | { |
1023 | struct dirent *dent; | |
1024 | DIR *dir = opendir(dir_name); | |
1025 | int ret = 0; | |
1026 | ||
1027 | if (!dir) { | |
1028 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
1029 | return -1; | |
1030 | } | |
1031 | ||
1032 | while ((dent = readdir(dir)) != NULL) { | |
1033 | char path[PATH_MAX]; | |
1034 | struct stat st; | |
1035 | ||
1036 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1037 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
1038 | if (stat(path, &st)) | |
1039 | continue; | |
1040 | ||
1041 | if (S_ISDIR(st.st_mode)) { | |
1042 | if (!strcmp(dent->d_name, ".") || | |
1043 | !strcmp(dent->d_name, "..")) | |
1044 | continue; | |
1045 | ||
61d4290c RY |
1046 | /* Do not follow top-level source and build symlinks */ |
1047 | if (depth == 0) { | |
1048 | if (!strcmp(dent->d_name, "source") || | |
1049 | !strcmp(dent->d_name, "build")) | |
1050 | continue; | |
1051 | } | |
1052 | ||
1053 | ret = map_groups__set_modules_path_dir(mg, path, | |
1054 | depth + 1); | |
3f067dca ACM |
1055 | if (ret < 0) |
1056 | goto out; | |
1057 | } else { | |
bb58a8a4 | 1058 | struct kmod_path m; |
3f067dca | 1059 | |
bb58a8a4 JO |
1060 | ret = kmod_path__parse_name(&m, dent->d_name); |
1061 | if (ret) | |
1062 | goto out; | |
c00c48fc | 1063 | |
bb58a8a4 JO |
1064 | if (m.kmod) |
1065 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 1066 | |
bb58a8a4 | 1067 | free(m.name); |
3f067dca | 1068 | |
bb58a8a4 | 1069 | if (ret) |
3f067dca | 1070 | goto out; |
3f067dca ACM |
1071 | } |
1072 | } | |
1073 | ||
1074 | out: | |
1075 | closedir(dir); | |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | static int machine__set_modules_path(struct machine *machine) | |
1080 | { | |
1081 | char *version; | |
1082 | char modules_path[PATH_MAX]; | |
1083 | ||
1084 | version = get_kernel_version(machine->root_dir); | |
1085 | if (!version) | |
1086 | return -1; | |
1087 | ||
61d4290c | 1088 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1089 | machine->root_dir, version); |
1090 | free(version); | |
1091 | ||
61d4290c | 1092 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
1093 | } |
1094 | ||
316d70d6 | 1095 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 1096 | { |
316d70d6 | 1097 | struct machine *machine = arg; |
3f067dca | 1098 | struct map *map; |
316d70d6 | 1099 | |
9f2de315 | 1100 | map = machine__findnew_module_map(machine, start, name); |
316d70d6 AH |
1101 | if (map == NULL) |
1102 | return -1; | |
1103 | ||
1104 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | static int machine__create_modules(struct machine *machine) | |
1110 | { | |
3f067dca ACM |
1111 | const char *modules; |
1112 | char path[PATH_MAX]; | |
1113 | ||
f4be904d | 1114 | if (machine__is_default_guest(machine)) { |
3f067dca | 1115 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1116 | } else { |
1117 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1118 | modules = path; |
1119 | } | |
1120 | ||
aa7fe3b0 | 1121 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1122 | return -1; |
1123 | ||
316d70d6 | 1124 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1125 | return -1; |
1126 | ||
316d70d6 AH |
1127 | if (!machine__set_modules_path(machine)) |
1128 | return 0; | |
3f067dca | 1129 | |
316d70d6 | 1130 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1131 | |
8f76fcd9 | 1132 | return 0; |
3f067dca ACM |
1133 | } |
1134 | ||
1135 | int machine__create_kernel_maps(struct machine *machine) | |
1136 | { | |
1137 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 1138 | const char *name; |
45e90056 | 1139 | u64 addr; |
1154c957 MH |
1140 | int ret; |
1141 | ||
45e90056 | 1142 | if (kernel == NULL) |
5512cf24 | 1143 | return -1; |
3f067dca | 1144 | |
1154c957 MH |
1145 | ret = __machine__create_kernel_maps(machine, kernel); |
1146 | dso__put(kernel); | |
1147 | if (ret < 0) | |
3f067dca ACM |
1148 | return -1; |
1149 | ||
1150 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1151 | if (machine__is_host(machine)) | |
1152 | pr_debug("Problems creating module maps, " | |
1153 | "continuing anyway...\n"); | |
1154 | else | |
1155 | pr_debug("Problems creating module maps for guest %d, " | |
1156 | "continuing anyway...\n", machine->pid); | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * Now that we have all the maps created, just set the ->end of them: | |
1161 | */ | |
1162 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 | 1163 | |
45e90056 ACM |
1164 | addr = machine__get_running_kernel_start(machine, &name); |
1165 | if (!addr) { | |
1166 | } else if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, addr)) { | |
5512cf24 AH |
1167 | machine__destroy_kernel_maps(machine); |
1168 | return -1; | |
1169 | } | |
1170 | ||
3f067dca ACM |
1171 | return 0; |
1172 | } | |
1173 | ||
b0a7d1a0 ACM |
1174 | static void machine__set_kernel_mmap_len(struct machine *machine, |
1175 | union perf_event *event) | |
1176 | { | |
4552cf0f NK |
1177 | int i; |
1178 | ||
1179 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1180 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1181 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1182 | event->mmap.len); | |
1183 | /* | |
1184 | * Be a bit paranoid here, some perf.data file came with | |
1185 | * a zero sized synthesized MMAP event for the kernel. | |
1186 | */ | |
1187 | if (machine->vmlinux_maps[i]->end == 0) | |
1188 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1189 | } | |
b0a7d1a0 ACM |
1190 | } |
1191 | ||
8e0cf965 AH |
1192 | static bool machine__uses_kcore(struct machine *machine) |
1193 | { | |
1194 | struct dso *dso; | |
1195 | ||
3d39ac53 | 1196 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1197 | if (dso__is_kcore(dso)) |
1198 | return true; | |
1199 | } | |
1200 | ||
1201 | return false; | |
1202 | } | |
1203 | ||
b0a7d1a0 ACM |
1204 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1205 | union perf_event *event) | |
1206 | { | |
1207 | struct map *map; | |
1208 | char kmmap_prefix[PATH_MAX]; | |
1209 | enum dso_kernel_type kernel_type; | |
1210 | bool is_kernel_mmap; | |
1211 | ||
8e0cf965 AH |
1212 | /* If we have maps from kcore then we do not need or want any others */ |
1213 | if (machine__uses_kcore(machine)) | |
1214 | return 0; | |
1215 | ||
b0a7d1a0 ACM |
1216 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1217 | if (machine__is_host(machine)) | |
1218 | kernel_type = DSO_TYPE_KERNEL; | |
1219 | else | |
1220 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1221 | ||
1222 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1223 | kmmap_prefix, | |
1224 | strlen(kmmap_prefix) - 1) == 0; | |
1225 | if (event->mmap.filename[0] == '/' || | |
1226 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
9f2de315 ACM |
1227 | map = machine__findnew_module_map(machine, event->mmap.start, |
1228 | event->mmap.filename); | |
b0a7d1a0 ACM |
1229 | if (map == NULL) |
1230 | goto out_problem; | |
1231 | ||
b0a7d1a0 ACM |
1232 | map->end = map->start + event->mmap.len; |
1233 | } else if (is_kernel_mmap) { | |
1234 | const char *symbol_name = (event->mmap.filename + | |
1235 | strlen(kmmap_prefix)); | |
1236 | /* | |
1237 | * Should be there already, from the build-id table in | |
1238 | * the header. | |
1239 | */ | |
b837a8bd NK |
1240 | struct dso *kernel = NULL; |
1241 | struct dso *dso; | |
1242 | ||
e8807844 ACM |
1243 | pthread_rwlock_rdlock(&machine->dsos.lock); |
1244 | ||
3d39ac53 | 1245 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1246 | |
1247 | /* | |
1248 | * The cpumode passed to is_kernel_module is not the | |
1249 | * cpumode of *this* event. If we insist on passing | |
1250 | * correct cpumode to is_kernel_module, we should | |
1251 | * record the cpumode when we adding this dso to the | |
1252 | * linked list. | |
1253 | * | |
1254 | * However we don't really need passing correct | |
1255 | * cpumode. We know the correct cpumode must be kernel | |
1256 | * mode (if not, we should not link it onto kernel_dsos | |
1257 | * list). | |
1258 | * | |
1259 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1260 | * is_kernel_module() treats it as a kernel cpumode. | |
1261 | */ | |
1262 | ||
1263 | if (!dso->kernel || | |
1264 | is_kernel_module(dso->long_name, | |
1265 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1266 | continue; |
1267 | ||
1f121b03 | 1268 | |
b837a8bd NK |
1269 | kernel = dso; |
1270 | break; | |
1271 | } | |
1272 | ||
e8807844 ACM |
1273 | pthread_rwlock_unlock(&machine->dsos.lock); |
1274 | ||
b837a8bd | 1275 | if (kernel == NULL) |
aa7cc2ae | 1276 | kernel = machine__findnew_dso(machine, kmmap_prefix); |
b0a7d1a0 ACM |
1277 | if (kernel == NULL) |
1278 | goto out_problem; | |
1279 | ||
1280 | kernel->kernel = kernel_type; | |
d3a7c489 ACM |
1281 | if (__machine__create_kernel_maps(machine, kernel) < 0) { |
1282 | dso__put(kernel); | |
b0a7d1a0 | 1283 | goto out_problem; |
d3a7c489 | 1284 | } |
b0a7d1a0 | 1285 | |
330dfa22 NK |
1286 | if (strstr(kernel->long_name, "vmlinux")) |
1287 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1288 | |
b0a7d1a0 ACM |
1289 | machine__set_kernel_mmap_len(machine, event); |
1290 | ||
1291 | /* | |
1292 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1293 | * symbol. Effectively having zero here means that at record | |
1294 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1295 | */ | |
1296 | if (event->mmap.pgoff != 0) { | |
1297 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1298 | symbol_name, | |
1299 | event->mmap.pgoff); | |
1300 | } | |
1301 | ||
1302 | if (machine__is_default_guest(machine)) { | |
1303 | /* | |
1304 | * preload dso of guest kernel and modules | |
1305 | */ | |
a5e813c6 | 1306 | dso__load(kernel, machine__kernel_map(machine), NULL); |
b0a7d1a0 ACM |
1307 | } |
1308 | } | |
1309 | return 0; | |
1310 | out_problem: | |
1311 | return -1; | |
1312 | } | |
1313 | ||
5c5e854b | 1314 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef | 1315 | union perf_event *event, |
473398a2 | 1316 | struct perf_sample *sample) |
5c5e854b | 1317 | { |
5c5e854b SE |
1318 | struct thread *thread; |
1319 | struct map *map; | |
1320 | enum map_type type; | |
1321 | int ret = 0; | |
1322 | ||
1323 | if (dump_trace) | |
1324 | perf_event__fprintf_mmap2(event, stdout); | |
1325 | ||
473398a2 ACM |
1326 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1327 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
5c5e854b SE |
1328 | ret = machine__process_kernel_mmap_event(machine, event); |
1329 | if (ret < 0) | |
1330 | goto out_problem; | |
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1335 | event->mmap2.tid); |
5c5e854b SE |
1336 | if (thread == NULL) |
1337 | goto out_problem; | |
1338 | ||
1339 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1340 | type = MAP__VARIABLE; | |
1341 | else | |
1342 | type = MAP__FUNCTION; | |
1343 | ||
2a03068c | 1344 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1345 | event->mmap2.len, event->mmap2.pgoff, |
1346 | event->mmap2.pid, event->mmap2.maj, | |
1347 | event->mmap2.min, event->mmap2.ino, | |
1348 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1349 | event->mmap2.prot, |
1350 | event->mmap2.flags, | |
5835edda | 1351 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1352 | |
1353 | if (map == NULL) | |
b91fc39f | 1354 | goto out_problem_map; |
5c5e854b SE |
1355 | |
1356 | thread__insert_map(thread, map); | |
b91fc39f | 1357 | thread__put(thread); |
84c2cafa | 1358 | map__put(map); |
5c5e854b SE |
1359 | return 0; |
1360 | ||
b91fc39f ACM |
1361 | out_problem_map: |
1362 | thread__put(thread); | |
5c5e854b SE |
1363 | out_problem: |
1364 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1365 | return 0; | |
1366 | } | |
1367 | ||
162f0bef | 1368 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
473398a2 | 1369 | struct perf_sample *sample) |
b0a7d1a0 | 1370 | { |
b0a7d1a0 ACM |
1371 | struct thread *thread; |
1372 | struct map *map; | |
bad40917 | 1373 | enum map_type type; |
b0a7d1a0 ACM |
1374 | int ret = 0; |
1375 | ||
1376 | if (dump_trace) | |
1377 | perf_event__fprintf_mmap(event, stdout); | |
1378 | ||
473398a2 ACM |
1379 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1380 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
b0a7d1a0 ACM |
1381 | ret = machine__process_kernel_mmap_event(machine, event); |
1382 | if (ret < 0) | |
1383 | goto out_problem; | |
1384 | return 0; | |
1385 | } | |
1386 | ||
314add6b | 1387 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1388 | event->mmap.tid); |
b0a7d1a0 ACM |
1389 | if (thread == NULL) |
1390 | goto out_problem; | |
bad40917 SE |
1391 | |
1392 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1393 | type = MAP__VARIABLE; | |
1394 | else | |
1395 | type = MAP__FUNCTION; | |
1396 | ||
2a03068c | 1397 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1398 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1399 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1400 | event->mmap.filename, |
5835edda | 1401 | type, thread); |
bad40917 | 1402 | |
b0a7d1a0 | 1403 | if (map == NULL) |
b91fc39f | 1404 | goto out_problem_map; |
b0a7d1a0 ACM |
1405 | |
1406 | thread__insert_map(thread, map); | |
b91fc39f | 1407 | thread__put(thread); |
84c2cafa | 1408 | map__put(map); |
b0a7d1a0 ACM |
1409 | return 0; |
1410 | ||
b91fc39f ACM |
1411 | out_problem_map: |
1412 | thread__put(thread); | |
b0a7d1a0 ACM |
1413 | out_problem: |
1414 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1415 | return 0; | |
1416 | } | |
1417 | ||
b91fc39f | 1418 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1419 | { |
f3b623b8 | 1420 | if (machine->last_match == th) |
0ceb8f6e | 1421 | machine->last_match = NULL; |
f3b623b8 | 1422 | |
59a51c1d | 1423 | BUG_ON(atomic_read(&th->refcnt) == 0); |
b91fc39f ACM |
1424 | if (lock) |
1425 | pthread_rwlock_wrlock(&machine->threads_lock); | |
0170b14f | 1426 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 1427 | RB_CLEAR_NODE(&th->rb_node); |
d2c11034 | 1428 | --machine->nr_threads; |
236a3bbd | 1429 | /* |
f3b623b8 ACM |
1430 | * Move it first to the dead_threads list, then drop the reference, |
1431 | * if this is the last reference, then the thread__delete destructor | |
1432 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd DA |
1433 | */ |
1434 | list_add_tail(&th->node, &machine->dead_threads); | |
b91fc39f ACM |
1435 | if (lock) |
1436 | pthread_rwlock_unlock(&machine->threads_lock); | |
f3b623b8 | 1437 | thread__put(th); |
236a3bbd DA |
1438 | } |
1439 | ||
b91fc39f ACM |
1440 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1441 | { | |
1442 | return __machine__remove_thread(machine, th, true); | |
1443 | } | |
1444 | ||
162f0bef FW |
1445 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1446 | struct perf_sample *sample) | |
b0a7d1a0 | 1447 | { |
d75e6097 JO |
1448 | struct thread *thread = machine__find_thread(machine, |
1449 | event->fork.pid, | |
1450 | event->fork.tid); | |
314add6b AH |
1451 | struct thread *parent = machine__findnew_thread(machine, |
1452 | event->fork.ppid, | |
1453 | event->fork.ptid); | |
b91fc39f | 1454 | int err = 0; |
b0a7d1a0 | 1455 | |
5cb73340 AH |
1456 | if (dump_trace) |
1457 | perf_event__fprintf_task(event, stdout); | |
1458 | ||
1459 | /* | |
1460 | * There may be an existing thread that is not actually the parent, | |
1461 | * either because we are processing events out of order, or because the | |
1462 | * (fork) event that would have removed the thread was lost. Assume the | |
1463 | * latter case and continue on as best we can. | |
1464 | */ | |
1465 | if (parent->pid_ != (pid_t)event->fork.ppid) { | |
1466 | dump_printf("removing erroneous parent thread %d/%d\n", | |
1467 | parent->pid_, parent->tid); | |
1468 | machine__remove_thread(machine, parent); | |
1469 | thread__put(parent); | |
1470 | parent = machine__findnew_thread(machine, event->fork.ppid, | |
1471 | event->fork.ptid); | |
1472 | } | |
1473 | ||
236a3bbd | 1474 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1475 | if (thread != NULL) { |
236a3bbd | 1476 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1477 | thread__put(thread); |
1478 | } | |
236a3bbd | 1479 | |
314add6b AH |
1480 | thread = machine__findnew_thread(machine, event->fork.pid, |
1481 | event->fork.tid); | |
b0a7d1a0 ACM |
1482 | |
1483 | if (thread == NULL || parent == NULL || | |
162f0bef | 1484 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 | 1485 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1486 | err = -1; |
b0a7d1a0 | 1487 | } |
b91fc39f ACM |
1488 | thread__put(thread); |
1489 | thread__put(parent); | |
b0a7d1a0 | 1490 | |
b91fc39f | 1491 | return err; |
b0a7d1a0 ACM |
1492 | } |
1493 | ||
162f0bef FW |
1494 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1495 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1496 | { |
d75e6097 JO |
1497 | struct thread *thread = machine__find_thread(machine, |
1498 | event->fork.pid, | |
1499 | event->fork.tid); | |
b0a7d1a0 ACM |
1500 | |
1501 | if (dump_trace) | |
1502 | perf_event__fprintf_task(event, stdout); | |
1503 | ||
b91fc39f | 1504 | if (thread != NULL) { |
236a3bbd | 1505 | thread__exited(thread); |
b91fc39f ACM |
1506 | thread__put(thread); |
1507 | } | |
b0a7d1a0 ACM |
1508 | |
1509 | return 0; | |
1510 | } | |
1511 | ||
162f0bef FW |
1512 | int machine__process_event(struct machine *machine, union perf_event *event, |
1513 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1514 | { |
1515 | int ret; | |
1516 | ||
1517 | switch (event->header.type) { | |
1518 | case PERF_RECORD_COMM: | |
162f0bef | 1519 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1520 | case PERF_RECORD_MMAP: |
162f0bef | 1521 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1522 | case PERF_RECORD_MMAP2: |
162f0bef | 1523 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1524 | case PERF_RECORD_FORK: |
162f0bef | 1525 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1526 | case PERF_RECORD_EXIT: |
162f0bef | 1527 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1528 | case PERF_RECORD_LOST: |
162f0bef | 1529 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
1530 | case PERF_RECORD_AUX: |
1531 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 | 1532 | case PERF_RECORD_ITRACE_START: |
ceb92913 | 1533 | ret = machine__process_itrace_start_event(machine, event); break; |
c4937a91 KL |
1534 | case PERF_RECORD_LOST_SAMPLES: |
1535 | ret = machine__process_lost_samples_event(machine, event, sample); break; | |
0286039f AH |
1536 | case PERF_RECORD_SWITCH: |
1537 | case PERF_RECORD_SWITCH_CPU_WIDE: | |
1538 | ret = machine__process_switch_event(machine, event); break; | |
b0a7d1a0 ACM |
1539 | default: |
1540 | ret = -1; | |
1541 | break; | |
1542 | } | |
1543 | ||
1544 | return ret; | |
1545 | } | |
3f067dca | 1546 | |
b21484f1 | 1547 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1548 | { |
b21484f1 | 1549 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1550 | return 1; |
3f067dca ACM |
1551 | return 0; |
1552 | } | |
1553 | ||
bb871a9c | 1554 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1555 | struct addr_map_symbol *ams, |
1556 | u64 ip) | |
1557 | { | |
1558 | struct addr_location al; | |
3f067dca ACM |
1559 | |
1560 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1561 | /* |
1562 | * We cannot use the header.misc hint to determine whether a | |
1563 | * branch stack address is user, kernel, guest, hypervisor. | |
1564 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1565 | * Thus, we have to try consecutively until we find a match | |
1566 | * or else, the symbol is unknown | |
1567 | */ | |
bb871a9c | 1568 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1569 | |
3f067dca ACM |
1570 | ams->addr = ip; |
1571 | ams->al_addr = al.addr; | |
1572 | ams->sym = al.sym; | |
1573 | ams->map = al.map; | |
1574 | } | |
1575 | ||
bb871a9c | 1576 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1577 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1578 | { | |
1579 | struct addr_location al; | |
1580 | ||
1581 | memset(&al, 0, sizeof(al)); | |
1582 | ||
bb871a9c | 1583 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1584 | if (al.map == NULL) { |
1585 | /* | |
1586 | * some shared data regions have execute bit set which puts | |
1587 | * their mapping in the MAP__FUNCTION type array. | |
1588 | * Check there as a fallback option before dropping the sample. | |
1589 | */ | |
bb871a9c | 1590 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1591 | } |
1592 | ||
98a3b32c SE |
1593 | ams->addr = addr; |
1594 | ams->al_addr = al.addr; | |
1595 | ams->sym = al.sym; | |
1596 | ams->map = al.map; | |
1597 | } | |
1598 | ||
e80faac0 ACM |
1599 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1600 | struct addr_location *al) | |
98a3b32c SE |
1601 | { |
1602 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1603 | ||
1604 | if (!mi) | |
1605 | return NULL; | |
1606 | ||
bb871a9c ACM |
1607 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1608 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1609 | mi->data_src.val = sample->data_src; |
1610 | ||
1611 | return mi; | |
1612 | } | |
1613 | ||
37592b8a | 1614 | static int add_callchain_ip(struct thread *thread, |
91d7b2de | 1615 | struct callchain_cursor *cursor, |
37592b8a AK |
1616 | struct symbol **parent, |
1617 | struct addr_location *root_al, | |
73dbcd65 | 1618 | u8 *cpumode, |
37592b8a AK |
1619 | u64 ip) |
1620 | { | |
1621 | struct addr_location al; | |
1622 | ||
1623 | al.filtered = 0; | |
1624 | al.sym = NULL; | |
73dbcd65 | 1625 | if (!cpumode) { |
8b7bad58 AK |
1626 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, |
1627 | ip, &al); | |
73dbcd65 | 1628 | } else { |
2e77784b KL |
1629 | if (ip >= PERF_CONTEXT_MAX) { |
1630 | switch (ip) { | |
1631 | case PERF_CONTEXT_HV: | |
73dbcd65 | 1632 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
1633 | break; |
1634 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 1635 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
1636 | break; |
1637 | case PERF_CONTEXT_USER: | |
73dbcd65 | 1638 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
1639 | break; |
1640 | default: | |
1641 | pr_debug("invalid callchain context: " | |
1642 | "%"PRId64"\n", (s64) ip); | |
1643 | /* | |
1644 | * It seems the callchain is corrupted. | |
1645 | * Discard all. | |
1646 | */ | |
91d7b2de | 1647 | callchain_cursor_reset(cursor); |
2e77784b KL |
1648 | return 1; |
1649 | } | |
1650 | return 0; | |
1651 | } | |
73dbcd65 DH |
1652 | thread__find_addr_location(thread, *cpumode, MAP__FUNCTION, |
1653 | ip, &al); | |
2e77784b KL |
1654 | } |
1655 | ||
37592b8a | 1656 | if (al.sym != NULL) { |
de7e6a7c | 1657 | if (perf_hpp_list.parent && !*parent && |
37592b8a AK |
1658 | symbol__match_regex(al.sym, &parent_regex)) |
1659 | *parent = al.sym; | |
1660 | else if (have_ignore_callees && root_al && | |
1661 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1662 | /* Treat this symbol as the root, | |
1663 | forgetting its callees. */ | |
1664 | *root_al = al; | |
91d7b2de | 1665 | callchain_cursor_reset(cursor); |
37592b8a AK |
1666 | } |
1667 | } | |
1668 | ||
b49a8fe5 NK |
1669 | if (symbol_conf.hide_unresolved && al.sym == NULL) |
1670 | return 0; | |
91d7b2de | 1671 | return callchain_cursor_append(cursor, al.addr, al.map, al.sym); |
37592b8a AK |
1672 | } |
1673 | ||
644f2df2 ACM |
1674 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1675 | struct addr_location *al) | |
3f067dca | 1676 | { |
3f067dca | 1677 | unsigned int i; |
644f2df2 ACM |
1678 | const struct branch_stack *bs = sample->branch_stack; |
1679 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1680 | |
3f067dca ACM |
1681 | if (!bi) |
1682 | return NULL; | |
1683 | ||
1684 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1685 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1686 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1687 | bi[i].flags = bs->entries[i].flags; |
1688 | } | |
1689 | return bi; | |
1690 | } | |
1691 | ||
8b7bad58 AK |
1692 | #define CHASHSZ 127 |
1693 | #define CHASHBITS 7 | |
1694 | #define NO_ENTRY 0xff | |
1695 | ||
1696 | #define PERF_MAX_BRANCH_DEPTH 127 | |
1697 | ||
1698 | /* Remove loops. */ | |
1699 | static int remove_loops(struct branch_entry *l, int nr) | |
1700 | { | |
1701 | int i, j, off; | |
1702 | unsigned char chash[CHASHSZ]; | |
1703 | ||
1704 | memset(chash, NO_ENTRY, sizeof(chash)); | |
1705 | ||
1706 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
1707 | ||
1708 | for (i = 0; i < nr; i++) { | |
1709 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
1710 | ||
1711 | /* no collision handling for now */ | |
1712 | if (chash[h] == NO_ENTRY) { | |
1713 | chash[h] = i; | |
1714 | } else if (l[chash[h]].from == l[i].from) { | |
1715 | bool is_loop = true; | |
1716 | /* check if it is a real loop */ | |
1717 | off = 0; | |
1718 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
1719 | if (l[j].from != l[i + off].from) { | |
1720 | is_loop = false; | |
1721 | break; | |
1722 | } | |
1723 | if (is_loop) { | |
1724 | memmove(l + i, l + i + off, | |
1725 | (nr - (i + off)) * sizeof(*l)); | |
1726 | nr -= off; | |
1727 | } | |
1728 | } | |
1729 | } | |
1730 | return nr; | |
1731 | } | |
1732 | ||
384b6055 KL |
1733 | /* |
1734 | * Recolve LBR callstack chain sample | |
1735 | * Return: | |
1736 | * 1 on success get LBR callchain information | |
1737 | * 0 no available LBR callchain information, should try fp | |
1738 | * negative error code on other errors. | |
1739 | */ | |
1740 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
91d7b2de | 1741 | struct callchain_cursor *cursor, |
384b6055 KL |
1742 | struct perf_sample *sample, |
1743 | struct symbol **parent, | |
1744 | struct addr_location *root_al, | |
1745 | int max_stack) | |
3f067dca | 1746 | { |
384b6055 KL |
1747 | struct ip_callchain *chain = sample->callchain; |
1748 | int chain_nr = min(max_stack, (int)chain->nr); | |
73dbcd65 | 1749 | u8 cpumode = PERF_RECORD_MISC_USER; |
384b6055 KL |
1750 | int i, j, err; |
1751 | u64 ip; | |
1752 | ||
1753 | for (i = 0; i < chain_nr; i++) { | |
1754 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
1755 | break; | |
1756 | } | |
1757 | ||
1758 | /* LBR only affects the user callchain */ | |
1759 | if (i != chain_nr) { | |
1760 | struct branch_stack *lbr_stack = sample->branch_stack; | |
1761 | int lbr_nr = lbr_stack->nr; | |
1762 | /* | |
1763 | * LBR callstack can only get user call chain. | |
1764 | * The mix_chain_nr is kernel call chain | |
1765 | * number plus LBR user call chain number. | |
1766 | * i is kernel call chain number, | |
1767 | * 1 is PERF_CONTEXT_USER, | |
1768 | * lbr_nr + 1 is the user call chain number. | |
1769 | * For details, please refer to the comments | |
1770 | * in callchain__printf | |
1771 | */ | |
1772 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
1773 | ||
384b6055 KL |
1774 | for (j = 0; j < mix_chain_nr; j++) { |
1775 | if (callchain_param.order == ORDER_CALLEE) { | |
1776 | if (j < i + 1) | |
1777 | ip = chain->ips[j]; | |
1778 | else if (j > i + 1) | |
1779 | ip = lbr_stack->entries[j - i - 2].from; | |
1780 | else | |
1781 | ip = lbr_stack->entries[0].to; | |
1782 | } else { | |
1783 | if (j < lbr_nr) | |
1784 | ip = lbr_stack->entries[lbr_nr - j - 1].from; | |
1785 | else if (j > lbr_nr) | |
1786 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
1787 | else | |
1788 | ip = lbr_stack->entries[0].to; | |
1789 | } | |
1790 | ||
91d7b2de | 1791 | err = add_callchain_ip(thread, cursor, parent, root_al, &cpumode, ip); |
384b6055 KL |
1792 | if (err) |
1793 | return (err < 0) ? err : 0; | |
1794 | } | |
1795 | return 1; | |
1796 | } | |
1797 | ||
1798 | return 0; | |
1799 | } | |
1800 | ||
1801 | static int thread__resolve_callchain_sample(struct thread *thread, | |
91d7b2de | 1802 | struct callchain_cursor *cursor, |
384b6055 KL |
1803 | struct perf_evsel *evsel, |
1804 | struct perf_sample *sample, | |
1805 | struct symbol **parent, | |
1806 | struct addr_location *root_al, | |
1807 | int max_stack) | |
1808 | { | |
1809 | struct branch_stack *branch = sample->branch_stack; | |
1810 | struct ip_callchain *chain = sample->callchain; | |
a29d5c9b | 1811 | int chain_nr = chain->nr; |
73dbcd65 | 1812 | u8 cpumode = PERF_RECORD_MISC_USER; |
bf8bddbf | 1813 | int i, j, err, nr_entries; |
8b7bad58 AK |
1814 | int skip_idx = -1; |
1815 | int first_call = 0; | |
1816 | ||
acf2abbd | 1817 | if (perf_evsel__has_branch_callstack(evsel)) { |
91d7b2de | 1818 | err = resolve_lbr_callchain_sample(thread, cursor, sample, parent, |
384b6055 KL |
1819 | root_al, max_stack); |
1820 | if (err) | |
1821 | return (err < 0) ? err : 0; | |
1822 | } | |
1823 | ||
8b7bad58 AK |
1824 | /* |
1825 | * Based on DWARF debug information, some architectures skip | |
1826 | * a callchain entry saved by the kernel. | |
1827 | */ | |
bf8bddbf | 1828 | skip_idx = arch_skip_callchain_idx(thread, chain); |
3f067dca | 1829 | |
8b7bad58 AK |
1830 | /* |
1831 | * Add branches to call stack for easier browsing. This gives | |
1832 | * more context for a sample than just the callers. | |
1833 | * | |
1834 | * This uses individual histograms of paths compared to the | |
1835 | * aggregated histograms the normal LBR mode uses. | |
1836 | * | |
1837 | * Limitations for now: | |
1838 | * - No extra filters | |
1839 | * - No annotations (should annotate somehow) | |
1840 | */ | |
1841 | ||
1842 | if (branch && callchain_param.branch_callstack) { | |
1843 | int nr = min(max_stack, (int)branch->nr); | |
1844 | struct branch_entry be[nr]; | |
1845 | ||
1846 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
1847 | pr_warning("corrupted branch chain. skipping...\n"); | |
1848 | goto check_calls; | |
1849 | } | |
1850 | ||
1851 | for (i = 0; i < nr; i++) { | |
1852 | if (callchain_param.order == ORDER_CALLEE) { | |
1853 | be[i] = branch->entries[i]; | |
1854 | /* | |
1855 | * Check for overlap into the callchain. | |
1856 | * The return address is one off compared to | |
1857 | * the branch entry. To adjust for this | |
1858 | * assume the calling instruction is not longer | |
1859 | * than 8 bytes. | |
1860 | */ | |
1861 | if (i == skip_idx || | |
1862 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
1863 | first_call++; | |
1864 | else if (be[i].from < chain->ips[first_call] && | |
1865 | be[i].from >= chain->ips[first_call] - 8) | |
1866 | first_call++; | |
1867 | } else | |
1868 | be[i] = branch->entries[branch->nr - i - 1]; | |
1869 | } | |
1870 | ||
1871 | nr = remove_loops(be, nr); | |
1872 | ||
1873 | for (i = 0; i < nr; i++) { | |
91d7b2de | 1874 | err = add_callchain_ip(thread, cursor, parent, root_al, |
73dbcd65 | 1875 | NULL, be[i].to); |
8b7bad58 | 1876 | if (!err) |
91d7b2de | 1877 | err = add_callchain_ip(thread, cursor, parent, root_al, |
73dbcd65 | 1878 | NULL, be[i].from); |
8b7bad58 AK |
1879 | if (err == -EINVAL) |
1880 | break; | |
1881 | if (err) | |
1882 | return err; | |
1883 | } | |
1884 | chain_nr -= nr; | |
1885 | } | |
1886 | ||
1887 | check_calls: | |
bf8bddbf | 1888 | for (i = first_call, nr_entries = 0; |
a29d5c9b | 1889 | i < chain_nr && nr_entries < max_stack; i++) { |
3f067dca | 1890 | u64 ip; |
3f067dca ACM |
1891 | |
1892 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1893 | j = i; |
3f067dca | 1894 | else |
a60335ba SB |
1895 | j = chain->nr - i - 1; |
1896 | ||
1897 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1898 | if (j == skip_idx) | |
1899 | continue; | |
1900 | #endif | |
1901 | ip = chain->ips[j]; | |
3f067dca | 1902 | |
bf8bddbf ACM |
1903 | if (ip < PERF_CONTEXT_MAX) |
1904 | ++nr_entries; | |
a29d5c9b | 1905 | |
91d7b2de | 1906 | err = add_callchain_ip(thread, cursor, parent, root_al, &cpumode, ip); |
3f067dca | 1907 | |
3f067dca | 1908 | if (err) |
2e77784b | 1909 | return (err < 0) ? err : 0; |
3f067dca ACM |
1910 | } |
1911 | ||
1912 | return 0; | |
1913 | } | |
1914 | ||
1915 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1916 | { | |
1917 | struct callchain_cursor *cursor = arg; | |
b49a8fe5 NK |
1918 | |
1919 | if (symbol_conf.hide_unresolved && entry->sym == NULL) | |
1920 | return 0; | |
3f067dca ACM |
1921 | return callchain_cursor_append(cursor, entry->ip, |
1922 | entry->map, entry->sym); | |
1923 | } | |
1924 | ||
9919a65e CP |
1925 | static int thread__resolve_callchain_unwind(struct thread *thread, |
1926 | struct callchain_cursor *cursor, | |
1927 | struct perf_evsel *evsel, | |
1928 | struct perf_sample *sample, | |
1929 | int max_stack) | |
3f067dca | 1930 | { |
3f067dca ACM |
1931 | /* Can we do dwarf post unwind? */ |
1932 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1933 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1934 | return 0; | |
1935 | ||
1936 | /* Bail out if nothing was captured. */ | |
1937 | if ((!sample->user_regs.regs) || | |
1938 | (!sample->user_stack.size)) | |
1939 | return 0; | |
1940 | ||
91d7b2de | 1941 | return unwind__get_entries(unwind_entry, cursor, |
352ea45a | 1942 | thread, sample, max_stack); |
9919a65e | 1943 | } |
3f067dca | 1944 | |
9919a65e CP |
1945 | int thread__resolve_callchain(struct thread *thread, |
1946 | struct callchain_cursor *cursor, | |
1947 | struct perf_evsel *evsel, | |
1948 | struct perf_sample *sample, | |
1949 | struct symbol **parent, | |
1950 | struct addr_location *root_al, | |
1951 | int max_stack) | |
1952 | { | |
1953 | int ret = 0; | |
1954 | ||
1955 | callchain_cursor_reset(&callchain_cursor); | |
1956 | ||
1957 | if (callchain_param.order == ORDER_CALLEE) { | |
1958 | ret = thread__resolve_callchain_sample(thread, cursor, | |
1959 | evsel, sample, | |
1960 | parent, root_al, | |
1961 | max_stack); | |
1962 | if (ret) | |
1963 | return ret; | |
1964 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
1965 | evsel, sample, | |
1966 | max_stack); | |
1967 | } else { | |
1968 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
1969 | evsel, sample, | |
1970 | max_stack); | |
1971 | if (ret) | |
1972 | return ret; | |
1973 | ret = thread__resolve_callchain_sample(thread, cursor, | |
1974 | evsel, sample, | |
1975 | parent, root_al, | |
1976 | max_stack); | |
1977 | } | |
1978 | ||
1979 | return ret; | |
3f067dca | 1980 | } |
35feee19 DA |
1981 | |
1982 | int machine__for_each_thread(struct machine *machine, | |
1983 | int (*fn)(struct thread *thread, void *p), | |
1984 | void *priv) | |
1985 | { | |
1986 | struct rb_node *nd; | |
1987 | struct thread *thread; | |
1988 | int rc = 0; | |
1989 | ||
1990 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1991 | thread = rb_entry(nd, struct thread, rb_node); | |
1992 | rc = fn(thread, priv); | |
1993 | if (rc != 0) | |
1994 | return rc; | |
1995 | } | |
1996 | ||
1997 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1998 | rc = fn(thread, priv); | |
1999 | if (rc != 0) | |
2000 | return rc; | |
2001 | } | |
2002 | return rc; | |
2003 | } | |
58d925dc | 2004 | |
a5499b37 AH |
2005 | int machines__for_each_thread(struct machines *machines, |
2006 | int (*fn)(struct thread *thread, void *p), | |
2007 | void *priv) | |
2008 | { | |
2009 | struct rb_node *nd; | |
2010 | int rc = 0; | |
2011 | ||
2012 | rc = machine__for_each_thread(&machines->host, fn, priv); | |
2013 | if (rc != 0) | |
2014 | return rc; | |
2015 | ||
2016 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
2017 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
2018 | ||
2019 | rc = machine__for_each_thread(machine, fn, priv); | |
2020 | if (rc != 0) | |
2021 | return rc; | |
2022 | } | |
2023 | return rc; | |
2024 | } | |
2025 | ||
a33fbd56 | 2026 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 2027 | struct target *target, struct thread_map *threads, |
9d9cad76 KL |
2028 | perf_event__handler_t process, bool data_mmap, |
2029 | unsigned int proc_map_timeout) | |
58d925dc | 2030 | { |
602ad878 | 2031 | if (target__has_task(target)) |
9d9cad76 | 2032 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, proc_map_timeout); |
602ad878 | 2033 | else if (target__has_cpu(target)) |
9d9cad76 | 2034 | return perf_event__synthesize_threads(tool, process, machine, data_mmap, proc_map_timeout); |
58d925dc ACM |
2035 | /* command specified */ |
2036 | return 0; | |
2037 | } | |
b9d266ba AH |
2038 | |
2039 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
2040 | { | |
2041 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
2042 | return -1; | |
2043 | ||
2044 | return machine->current_tid[cpu]; | |
2045 | } | |
2046 | ||
2047 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
2048 | pid_t tid) | |
2049 | { | |
2050 | struct thread *thread; | |
2051 | ||
2052 | if (cpu < 0) | |
2053 | return -EINVAL; | |
2054 | ||
2055 | if (!machine->current_tid) { | |
2056 | int i; | |
2057 | ||
2058 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
2059 | if (!machine->current_tid) | |
2060 | return -ENOMEM; | |
2061 | for (i = 0; i < MAX_NR_CPUS; i++) | |
2062 | machine->current_tid[i] = -1; | |
2063 | } | |
2064 | ||
2065 | if (cpu >= MAX_NR_CPUS) { | |
2066 | pr_err("Requested CPU %d too large. ", cpu); | |
2067 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
2068 | return -EINVAL; | |
2069 | } | |
2070 | ||
2071 | machine->current_tid[cpu] = tid; | |
2072 | ||
2073 | thread = machine__findnew_thread(machine, pid, tid); | |
2074 | if (!thread) | |
2075 | return -ENOMEM; | |
2076 | ||
2077 | thread->cpu = cpu; | |
b91fc39f | 2078 | thread__put(thread); |
b9d266ba AH |
2079 | |
2080 | return 0; | |
2081 | } | |
fbe2af45 AH |
2082 | |
2083 | int machine__get_kernel_start(struct machine *machine) | |
2084 | { | |
a5e813c6 | 2085 | struct map *map = machine__kernel_map(machine); |
fbe2af45 AH |
2086 | int err = 0; |
2087 | ||
2088 | /* | |
2089 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
2090 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
2091 | * all addresses including kernel addresses are less than 2^32. In | |
2092 | * that case (32-bit system), if the kernel mapping is unknown, all | |
2093 | * addresses will be assumed to be in user space - see | |
2094 | * machine__kernel_ip(). | |
2095 | */ | |
2096 | machine->kernel_start = 1ULL << 63; | |
2097 | if (map) { | |
2098 | err = map__load(map, machine->symbol_filter); | |
2099 | if (map->start) | |
2100 | machine->kernel_start = map->start; | |
2101 | } | |
2102 | return err; | |
2103 | } | |
aa7cc2ae ACM |
2104 | |
2105 | struct dso *machine__findnew_dso(struct machine *machine, const char *filename) | |
2106 | { | |
e8807844 | 2107 | return dsos__findnew(&machine->dsos, filename); |
aa7cc2ae | 2108 | } |
c3168b0d ACM |
2109 | |
2110 | char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) | |
2111 | { | |
2112 | struct machine *machine = vmachine; | |
2113 | struct map *map; | |
2114 | struct symbol *sym = map_groups__find_symbol(&machine->kmaps, MAP__FUNCTION, *addrp, &map, NULL); | |
2115 | ||
2116 | if (sym == NULL) | |
2117 | return NULL; | |
2118 | ||
2119 | *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL; | |
2120 | *addrp = map->unmap_ip(map, sym->start); | |
2121 | return sym->name; | |
2122 | } |