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Commit | Line | Data |
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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 | ||
14bd6d20 | 44 | machine->id_hdr_size = 0; |
caf8a0d0 | 45 | machine->kptr_restrict_warned = false; |
cfe1c414 | 46 | machine->comm_exec = false; |
fbe2af45 | 47 | machine->kernel_start = 0; |
611a5ce8 | 48 | |
cc1121ab MH |
49 | memset(machine->vmlinux_maps, 0, sizeof(machine->vmlinux_maps)); |
50 | ||
69d2591a ACM |
51 | machine->root_dir = strdup(root_dir); |
52 | if (machine->root_dir == NULL) | |
53 | return -ENOMEM; | |
54 | ||
55 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 56 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 57 | pid); |
69d2591a ACM |
58 | char comm[64]; |
59 | ||
60 | if (thread == NULL) | |
61 | return -ENOMEM; | |
62 | ||
63 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 64 | thread__set_comm(thread, comm, 0); |
b91fc39f | 65 | thread__put(thread); |
69d2591a ACM |
66 | } |
67 | ||
b9d266ba AH |
68 | machine->current_tid = NULL; |
69 | ||
69d2591a ACM |
70 | return 0; |
71 | } | |
72 | ||
8fb598e5 DA |
73 | struct machine *machine__new_host(void) |
74 | { | |
75 | struct machine *machine = malloc(sizeof(*machine)); | |
76 | ||
77 | if (machine != NULL) { | |
78 | machine__init(machine, "", HOST_KERNEL_ID); | |
79 | ||
80 | if (machine__create_kernel_maps(machine) < 0) | |
81 | goto out_delete; | |
82 | } | |
83 | ||
84 | return machine; | |
85 | out_delete: | |
86 | free(machine); | |
87 | return NULL; | |
88 | } | |
89 | ||
d3a7c489 | 90 | static void dsos__purge(struct dsos *dsos) |
69d2591a ACM |
91 | { |
92 | struct dso *pos, *n; | |
93 | ||
e8807844 ACM |
94 | pthread_rwlock_wrlock(&dsos->lock); |
95 | ||
8fa7d87f | 96 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 97 | RB_CLEAR_NODE(&pos->rb_node); |
e266a753 | 98 | pos->root = NULL; |
d3a7c489 ACM |
99 | list_del_init(&pos->node); |
100 | dso__put(pos); | |
69d2591a | 101 | } |
e8807844 ACM |
102 | |
103 | pthread_rwlock_unlock(&dsos->lock); | |
d3a7c489 | 104 | } |
e8807844 | 105 | |
d3a7c489 ACM |
106 | static void dsos__exit(struct dsos *dsos) |
107 | { | |
108 | dsos__purge(dsos); | |
e8807844 | 109 | pthread_rwlock_destroy(&dsos->lock); |
69d2591a ACM |
110 | } |
111 | ||
3f067dca ACM |
112 | void machine__delete_threads(struct machine *machine) |
113 | { | |
b91fc39f | 114 | struct rb_node *nd; |
3f067dca | 115 | |
b91fc39f ACM |
116 | pthread_rwlock_wrlock(&machine->threads_lock); |
117 | nd = rb_first(&machine->threads); | |
3f067dca ACM |
118 | while (nd) { |
119 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
120 | ||
3f067dca | 121 | nd = rb_next(nd); |
b91fc39f | 122 | __machine__remove_thread(machine, t, false); |
3f067dca | 123 | } |
b91fc39f | 124 | pthread_rwlock_unlock(&machine->threads_lock); |
3f067dca ACM |
125 | } |
126 | ||
69d2591a ACM |
127 | void machine__exit(struct machine *machine) |
128 | { | |
ebe9729c | 129 | machine__destroy_kernel_maps(machine); |
69d2591a | 130 | map_groups__exit(&machine->kmaps); |
e8807844 | 131 | dsos__exit(&machine->dsos); |
9a4388c7 | 132 | machine__exit_vdso(machine); |
04662523 | 133 | zfree(&machine->root_dir); |
b9d266ba | 134 | zfree(&machine->current_tid); |
b91fc39f | 135 | pthread_rwlock_destroy(&machine->threads_lock); |
69d2591a ACM |
136 | } |
137 | ||
138 | void machine__delete(struct machine *machine) | |
139 | { | |
32ca678d ACM |
140 | if (machine) { |
141 | machine__exit(machine); | |
142 | free(machine); | |
143 | } | |
69d2591a ACM |
144 | } |
145 | ||
876650e6 ACM |
146 | void machines__init(struct machines *machines) |
147 | { | |
148 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
149 | machines->guests = RB_ROOT; | |
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 | ||
173 | while (*p != NULL) { | |
174 | parent = *p; | |
175 | pos = rb_entry(parent, struct machine, rb_node); | |
176 | if (pid < pos->pid) | |
177 | p = &(*p)->rb_left; | |
178 | else | |
179 | p = &(*p)->rb_right; | |
180 | } | |
181 | ||
182 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 183 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
184 | |
185 | return machine; | |
186 | } | |
187 | ||
cfe1c414 AH |
188 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
189 | { | |
190 | struct rb_node *nd; | |
191 | ||
192 | machines->host.comm_exec = comm_exec; | |
193 | ||
194 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
195 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
196 | ||
197 | machine->comm_exec = comm_exec; | |
198 | } | |
199 | } | |
200 | ||
876650e6 | 201 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 202 | { |
876650e6 | 203 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
204 | struct rb_node *parent = NULL; |
205 | struct machine *machine; | |
206 | struct machine *default_machine = NULL; | |
207 | ||
876650e6 ACM |
208 | if (pid == HOST_KERNEL_ID) |
209 | return &machines->host; | |
210 | ||
69d2591a ACM |
211 | while (*p != NULL) { |
212 | parent = *p; | |
213 | machine = rb_entry(parent, struct machine, rb_node); | |
214 | if (pid < machine->pid) | |
215 | p = &(*p)->rb_left; | |
216 | else if (pid > machine->pid) | |
217 | p = &(*p)->rb_right; | |
218 | else | |
219 | return machine; | |
220 | if (!machine->pid) | |
221 | default_machine = machine; | |
222 | } | |
223 | ||
224 | return default_machine; | |
225 | } | |
226 | ||
876650e6 | 227 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
228 | { |
229 | char path[PATH_MAX]; | |
230 | const char *root_dir = ""; | |
231 | struct machine *machine = machines__find(machines, pid); | |
232 | ||
233 | if (machine && (machine->pid == pid)) | |
234 | goto out; | |
235 | ||
236 | if ((pid != HOST_KERNEL_ID) && | |
237 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
238 | (symbol_conf.guestmount)) { | |
239 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
240 | if (access(path, R_OK)) { | |
241 | static struct strlist *seen; | |
242 | ||
243 | if (!seen) | |
4a77e218 | 244 | seen = strlist__new(NULL, NULL); |
69d2591a ACM |
245 | |
246 | if (!strlist__has_entry(seen, path)) { | |
247 | pr_err("Can't access file %s\n", path); | |
248 | strlist__add(seen, path); | |
249 | } | |
250 | machine = NULL; | |
251 | goto out; | |
252 | } | |
253 | root_dir = path; | |
254 | } | |
255 | ||
256 | machine = machines__add(machines, pid, root_dir); | |
257 | out: | |
258 | return machine; | |
259 | } | |
260 | ||
876650e6 ACM |
261 | void machines__process_guests(struct machines *machines, |
262 | machine__process_t process, void *data) | |
69d2591a ACM |
263 | { |
264 | struct rb_node *nd; | |
265 | ||
876650e6 | 266 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
267 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
268 | process(pos, data); | |
269 | } | |
270 | } | |
271 | ||
272 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
273 | { | |
274 | if (machine__is_host(machine)) | |
275 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
276 | else if (machine__is_default_guest(machine)) | |
277 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
278 | else { | |
279 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
280 | machine->pid); | |
281 | } | |
282 | ||
283 | return bf; | |
284 | } | |
285 | ||
876650e6 | 286 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
287 | { |
288 | struct rb_node *node; | |
289 | struct machine *machine; | |
290 | ||
876650e6 ACM |
291 | machines->host.id_hdr_size = id_hdr_size; |
292 | ||
293 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
294 | machine = rb_entry(node, struct machine, rb_node); |
295 | machine->id_hdr_size = id_hdr_size; | |
296 | } | |
297 | ||
298 | return; | |
299 | } | |
300 | ||
29ce3612 AH |
301 | static void machine__update_thread_pid(struct machine *machine, |
302 | struct thread *th, pid_t pid) | |
303 | { | |
304 | struct thread *leader; | |
305 | ||
306 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
307 | return; | |
308 | ||
309 | th->pid_ = pid; | |
310 | ||
311 | if (th->pid_ == th->tid) | |
312 | return; | |
313 | ||
b91fc39f | 314 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
315 | if (!leader) |
316 | goto out_err; | |
317 | ||
318 | if (!leader->mg) | |
11246c70 | 319 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
320 | |
321 | if (!leader->mg) | |
322 | goto out_err; | |
323 | ||
324 | if (th->mg == leader->mg) | |
325 | return; | |
326 | ||
327 | if (th->mg) { | |
328 | /* | |
329 | * Maps are created from MMAP events which provide the pid and | |
330 | * tid. Consequently there never should be any maps on a thread | |
331 | * with an unknown pid. Just print an error if there are. | |
332 | */ | |
333 | if (!map_groups__empty(th->mg)) | |
334 | pr_err("Discarding thread maps for %d:%d\n", | |
335 | th->pid_, th->tid); | |
8e160b2e | 336 | map_groups__put(th->mg); |
29ce3612 AH |
337 | } |
338 | ||
339 | th->mg = map_groups__get(leader->mg); | |
abd82868 ACM |
340 | out_put: |
341 | thread__put(leader); | |
29ce3612 | 342 | return; |
29ce3612 AH |
343 | out_err: |
344 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
abd82868 | 345 | goto out_put; |
29ce3612 AH |
346 | } |
347 | ||
abd82868 | 348 | /* |
bd1a0be5 | 349 | * Caller must eventually drop thread->refcnt returned with a successful |
abd82868 ACM |
350 | * lookup/new thread inserted. |
351 | */ | |
b91fc39f ACM |
352 | static struct thread *____machine__findnew_thread(struct machine *machine, |
353 | pid_t pid, pid_t tid, | |
354 | bool create) | |
9d2f8e22 ACM |
355 | { |
356 | struct rb_node **p = &machine->threads.rb_node; | |
357 | struct rb_node *parent = NULL; | |
358 | struct thread *th; | |
359 | ||
360 | /* | |
38051234 | 361 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
362 | * so most of the time we dont have to look up |
363 | * the full rbtree: | |
364 | */ | |
29ce3612 | 365 | th = machine->last_match; |
f3b623b8 ACM |
366 | if (th != NULL) { |
367 | if (th->tid == tid) { | |
368 | machine__update_thread_pid(machine, th, pid); | |
abd82868 | 369 | return thread__get(th); |
f3b623b8 ACM |
370 | } |
371 | ||
0ceb8f6e | 372 | machine->last_match = NULL; |
99d725fc | 373 | } |
9d2f8e22 ACM |
374 | |
375 | while (*p != NULL) { | |
376 | parent = *p; | |
377 | th = rb_entry(parent, struct thread, rb_node); | |
378 | ||
38051234 | 379 | if (th->tid == tid) { |
0ceb8f6e | 380 | machine->last_match = th; |
29ce3612 | 381 | machine__update_thread_pid(machine, th, pid); |
abd82868 | 382 | return thread__get(th); |
9d2f8e22 ACM |
383 | } |
384 | ||
38051234 | 385 | if (tid < th->tid) |
9d2f8e22 ACM |
386 | p = &(*p)->rb_left; |
387 | else | |
388 | p = &(*p)->rb_right; | |
389 | } | |
390 | ||
391 | if (!create) | |
392 | return NULL; | |
393 | ||
99d725fc | 394 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
395 | if (th != NULL) { |
396 | rb_link_node(&th->rb_node, parent, p); | |
397 | rb_insert_color(&th->rb_node, &machine->threads); | |
cddcef60 JO |
398 | |
399 | /* | |
400 | * We have to initialize map_groups separately | |
401 | * after rb tree is updated. | |
402 | * | |
403 | * The reason is that we call machine__findnew_thread | |
404 | * within thread__init_map_groups to find the thread | |
405 | * leader and that would screwed the rb tree. | |
406 | */ | |
418029b7 | 407 | if (thread__init_map_groups(th, machine)) { |
0170b14f | 408 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 409 | RB_CLEAR_NODE(&th->rb_node); |
abd82868 | 410 | thread__put(th); |
cddcef60 | 411 | return NULL; |
418029b7 | 412 | } |
f3b623b8 ACM |
413 | /* |
414 | * It is now in the rbtree, get a ref | |
415 | */ | |
416 | thread__get(th); | |
0ceb8f6e | 417 | machine->last_match = th; |
d2c11034 | 418 | ++machine->nr_threads; |
9d2f8e22 ACM |
419 | } |
420 | ||
421 | return th; | |
422 | } | |
423 | ||
b91fc39f ACM |
424 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
425 | { | |
426 | return ____machine__findnew_thread(machine, pid, tid, true); | |
427 | } | |
428 | ||
314add6b AH |
429 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
430 | pid_t tid) | |
9d2f8e22 | 431 | { |
b91fc39f ACM |
432 | struct thread *th; |
433 | ||
434 | pthread_rwlock_wrlock(&machine->threads_lock); | |
abd82868 | 435 | th = __machine__findnew_thread(machine, pid, tid); |
b91fc39f ACM |
436 | pthread_rwlock_unlock(&machine->threads_lock); |
437 | return th; | |
9d2f8e22 ACM |
438 | } |
439 | ||
d75e6097 JO |
440 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
441 | pid_t tid) | |
9d2f8e22 | 442 | { |
b91fc39f ACM |
443 | struct thread *th; |
444 | pthread_rwlock_rdlock(&machine->threads_lock); | |
abd82868 | 445 | th = ____machine__findnew_thread(machine, pid, tid, false); |
b91fc39f ACM |
446 | pthread_rwlock_unlock(&machine->threads_lock); |
447 | return th; | |
9d2f8e22 | 448 | } |
b0a7d1a0 | 449 | |
cfe1c414 AH |
450 | struct comm *machine__thread_exec_comm(struct machine *machine, |
451 | struct thread *thread) | |
452 | { | |
453 | if (machine->comm_exec) | |
454 | return thread__exec_comm(thread); | |
455 | else | |
456 | return thread__comm(thread); | |
457 | } | |
458 | ||
162f0bef FW |
459 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
460 | struct perf_sample *sample) | |
b0a7d1a0 | 461 | { |
314add6b AH |
462 | struct thread *thread = machine__findnew_thread(machine, |
463 | event->comm.pid, | |
464 | event->comm.tid); | |
65de51f9 | 465 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 466 | int err = 0; |
b0a7d1a0 | 467 | |
cfe1c414 AH |
468 | if (exec) |
469 | machine->comm_exec = true; | |
470 | ||
b0a7d1a0 ACM |
471 | if (dump_trace) |
472 | perf_event__fprintf_comm(event, stdout); | |
473 | ||
65de51f9 AH |
474 | if (thread == NULL || |
475 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 476 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 477 | err = -1; |
b0a7d1a0 ACM |
478 | } |
479 | ||
b91fc39f ACM |
480 | thread__put(thread); |
481 | ||
482 | return err; | |
b0a7d1a0 ACM |
483 | } |
484 | ||
485 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 486 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
487 | { |
488 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
489 | event->lost.id, event->lost.lost); | |
490 | return 0; | |
491 | } | |
492 | ||
c4937a91 KL |
493 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
494 | union perf_event *event, struct perf_sample *sample) | |
495 | { | |
496 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n", | |
497 | sample->id, event->lost_samples.lost); | |
498 | return 0; | |
499 | } | |
500 | ||
9f2de315 ACM |
501 | static struct dso *machine__findnew_module_dso(struct machine *machine, |
502 | struct kmod_path *m, | |
503 | const char *filename) | |
da17ea33 JO |
504 | { |
505 | struct dso *dso; | |
da17ea33 | 506 | |
e8807844 ACM |
507 | pthread_rwlock_wrlock(&machine->dsos.lock); |
508 | ||
509 | dso = __dsos__find(&machine->dsos, m->name, true); | |
da17ea33 | 510 | if (!dso) { |
e8807844 | 511 | dso = __dsos__addnew(&machine->dsos, m->name); |
da17ea33 | 512 | if (dso == NULL) |
e8807844 | 513 | goto out_unlock; |
da17ea33 JO |
514 | |
515 | if (machine__is_host(machine)) | |
516 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
517 | else | |
518 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
519 | ||
520 | /* _KMODULE_COMP should be next to _KMODULE */ | |
ca33380a | 521 | if (m->kmod && m->comp) |
da17ea33 | 522 | dso->symtab_type++; |
ca33380a JO |
523 | |
524 | dso__set_short_name(dso, strdup(m->name), true); | |
525 | dso__set_long_name(dso, strdup(filename), true); | |
da17ea33 JO |
526 | } |
527 | ||
d3a7c489 | 528 | dso__get(dso); |
e8807844 ACM |
529 | out_unlock: |
530 | pthread_rwlock_unlock(&machine->dsos.lock); | |
da17ea33 JO |
531 | return dso; |
532 | } | |
533 | ||
4a96f7a0 AH |
534 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
535 | union perf_event *event) | |
536 | { | |
537 | if (dump_trace) | |
538 | perf_event__fprintf_aux(event, stdout); | |
539 | return 0; | |
540 | } | |
541 | ||
0ad21f68 AH |
542 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
543 | union perf_event *event) | |
544 | { | |
545 | if (dump_trace) | |
546 | perf_event__fprintf_itrace_start(event, stdout); | |
547 | return 0; | |
548 | } | |
549 | ||
0286039f AH |
550 | int machine__process_switch_event(struct machine *machine __maybe_unused, |
551 | union perf_event *event) | |
552 | { | |
553 | if (dump_trace) | |
554 | perf_event__fprintf_switch(event, stdout); | |
555 | return 0; | |
556 | } | |
557 | ||
c03d5184 WN |
558 | static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename) |
559 | { | |
560 | const char *dup_filename; | |
561 | ||
562 | if (!filename || !dso || !dso->long_name) | |
563 | return; | |
564 | if (dso->long_name[0] != '[') | |
565 | return; | |
566 | if (!strchr(filename, '/')) | |
567 | return; | |
568 | ||
569 | dup_filename = strdup(filename); | |
570 | if (!dup_filename) | |
571 | return; | |
572 | ||
5dcf16df | 573 | dso__set_long_name(dso, dup_filename, true); |
c03d5184 WN |
574 | } |
575 | ||
9f2de315 ACM |
576 | struct map *machine__findnew_module_map(struct machine *machine, u64 start, |
577 | const char *filename) | |
3f067dca | 578 | { |
ca33380a | 579 | struct map *map = NULL; |
566c69c3 | 580 | struct dso *dso = NULL; |
ca33380a | 581 | struct kmod_path m; |
3f067dca | 582 | |
ca33380a | 583 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
584 | return NULL; |
585 | ||
bc84f464 JO |
586 | map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, |
587 | m.name); | |
c03d5184 WN |
588 | if (map) { |
589 | /* | |
590 | * If the map's dso is an offline module, give dso__load() | |
591 | * a chance to find the file path of that module by fixing | |
592 | * long_name. | |
593 | */ | |
594 | dso__adjust_kmod_long_name(map->dso, filename); | |
bc84f464 | 595 | goto out; |
c03d5184 | 596 | } |
bc84f464 | 597 | |
9f2de315 | 598 | dso = machine__findnew_module_dso(machine, &m, filename); |
ca33380a JO |
599 | if (dso == NULL) |
600 | goto out; | |
601 | ||
3f067dca ACM |
602 | map = map__new2(start, dso, MAP__FUNCTION); |
603 | if (map == NULL) | |
ca33380a | 604 | goto out; |
3f067dca | 605 | |
3f067dca | 606 | map_groups__insert(&machine->kmaps, map); |
ca33380a | 607 | |
9afcb420 MH |
608 | /* Put the map here because map_groups__insert alread got it */ |
609 | map__put(map); | |
ca33380a | 610 | out: |
566c69c3 MH |
611 | /* put the dso here, corresponding to machine__findnew_module_dso */ |
612 | dso__put(dso); | |
ca33380a | 613 | free(m.name); |
3f067dca ACM |
614 | return map; |
615 | } | |
616 | ||
876650e6 | 617 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
618 | { |
619 | struct rb_node *nd; | |
3d39ac53 | 620 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 621 | |
876650e6 | 622 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 623 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 624 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
625 | } |
626 | ||
627 | return ret; | |
628 | } | |
629 | ||
8fa7d87f | 630 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
631 | bool (skip)(struct dso *dso, int parm), int parm) |
632 | { | |
3d39ac53 | 633 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
634 | } |
635 | ||
876650e6 | 636 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
637 | bool (skip)(struct dso *dso, int parm), int parm) |
638 | { | |
639 | struct rb_node *nd; | |
876650e6 | 640 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 641 | |
876650e6 | 642 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
643 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
644 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
645 | } | |
646 | return ret; | |
647 | } | |
648 | ||
649 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
650 | { | |
651 | int i; | |
652 | size_t printed = 0; | |
a5e813c6 | 653 | struct dso *kdso = machine__kernel_map(machine)->dso; |
3f067dca ACM |
654 | |
655 | if (kdso->has_build_id) { | |
656 | char filename[PATH_MAX]; | |
657 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
658 | printed += fprintf(fp, "[0] %s\n", filename); | |
659 | } | |
660 | ||
661 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
662 | printed += fprintf(fp, "[%d] %s\n", | |
663 | i + kdso->has_build_id, vmlinux_path[i]); | |
664 | ||
665 | return printed; | |
666 | } | |
667 | ||
668 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
669 | { | |
d2c11034 | 670 | size_t ret; |
3f067dca ACM |
671 | struct rb_node *nd; |
672 | ||
b91fc39f ACM |
673 | pthread_rwlock_rdlock(&machine->threads_lock); |
674 | ||
d2c11034 ACM |
675 | ret = fprintf(fp, "Threads: %u\n", machine->nr_threads); |
676 | ||
3f067dca ACM |
677 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { |
678 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
679 | ||
680 | ret += thread__fprintf(pos, fp); | |
681 | } | |
682 | ||
b91fc39f ACM |
683 | pthread_rwlock_unlock(&machine->threads_lock); |
684 | ||
3f067dca ACM |
685 | return ret; |
686 | } | |
687 | ||
688 | static struct dso *machine__get_kernel(struct machine *machine) | |
689 | { | |
690 | const char *vmlinux_name = NULL; | |
691 | struct dso *kernel; | |
692 | ||
693 | if (machine__is_host(machine)) { | |
694 | vmlinux_name = symbol_conf.vmlinux_name; | |
695 | if (!vmlinux_name) | |
0a77582f | 696 | vmlinux_name = DSO__NAME_KALLSYMS; |
3f067dca | 697 | |
459ce518 ACM |
698 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
699 | "[kernel]", DSO_TYPE_KERNEL); | |
3f067dca ACM |
700 | } else { |
701 | char bf[PATH_MAX]; | |
702 | ||
703 | if (machine__is_default_guest(machine)) | |
704 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
705 | if (!vmlinux_name) | |
706 | vmlinux_name = machine__mmap_name(machine, bf, | |
707 | sizeof(bf)); | |
708 | ||
459ce518 ACM |
709 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
710 | "[guest.kernel]", | |
711 | DSO_TYPE_GUEST_KERNEL); | |
3f067dca ACM |
712 | } |
713 | ||
714 | if (kernel != NULL && (!kernel->has_build_id)) | |
715 | dso__read_running_kernel_build_id(kernel, machine); | |
716 | ||
717 | return kernel; | |
718 | } | |
719 | ||
720 | struct process_args { | |
721 | u64 start; | |
722 | }; | |
723 | ||
15a0a870 AH |
724 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
725 | size_t bufsz) | |
726 | { | |
727 | if (machine__is_default_guest(machine)) | |
728 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
729 | else | |
730 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
731 | } | |
732 | ||
a93f0e55 SQ |
733 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
734 | ||
735 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
736 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
737 | * symbol_name if it's not that important. | |
738 | */ | |
4b99375b AH |
739 | static u64 machine__get_running_kernel_start(struct machine *machine, |
740 | const char **symbol_name) | |
3f067dca | 741 | { |
15a0a870 | 742 | char filename[PATH_MAX]; |
a93f0e55 SQ |
743 | int i; |
744 | const char *name; | |
745 | u64 addr = 0; | |
3f067dca | 746 | |
15a0a870 | 747 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
748 | |
749 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
750 | return 0; | |
751 | ||
a93f0e55 SQ |
752 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
753 | addr = kallsyms__get_function_start(filename, name); | |
754 | if (addr) | |
755 | break; | |
756 | } | |
757 | ||
758 | if (symbol_name) | |
759 | *symbol_name = name; | |
3f067dca | 760 | |
a93f0e55 | 761 | return addr; |
3f067dca ACM |
762 | } |
763 | ||
764 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
765 | { | |
766 | enum map_type type; | |
4b99375b | 767 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca | 768 | |
cc1121ab MH |
769 | /* In case of renewal the kernel map, destroy previous one */ |
770 | machine__destroy_kernel_maps(machine); | |
771 | ||
3f067dca ACM |
772 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
773 | struct kmap *kmap; | |
77e65977 | 774 | struct map *map; |
3f067dca ACM |
775 | |
776 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
777 | if (machine->vmlinux_maps[type] == NULL) | |
778 | return -1; | |
779 | ||
780 | machine->vmlinux_maps[type]->map_ip = | |
781 | machine->vmlinux_maps[type]->unmap_ip = | |
782 | identity__map_ip; | |
a5e813c6 | 783 | map = __machine__kernel_map(machine, type); |
77e65977 | 784 | kmap = map__kmap(map); |
ba92732e WN |
785 | if (!kmap) |
786 | return -1; | |
787 | ||
3f067dca | 788 | kmap->kmaps = &machine->kmaps; |
77e65977 | 789 | map_groups__insert(&machine->kmaps, map); |
3f067dca ACM |
790 | } |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
795 | void machine__destroy_kernel_maps(struct machine *machine) | |
796 | { | |
797 | enum map_type type; | |
798 | ||
799 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
800 | struct kmap *kmap; | |
a5e813c6 | 801 | struct map *map = __machine__kernel_map(machine, type); |
3f067dca | 802 | |
77e65977 | 803 | if (map == NULL) |
3f067dca ACM |
804 | continue; |
805 | ||
77e65977 ACM |
806 | kmap = map__kmap(map); |
807 | map_groups__remove(&machine->kmaps, map); | |
ba92732e | 808 | if (kmap && kmap->ref_reloc_sym) { |
3f067dca ACM |
809 | /* |
810 | * ref_reloc_sym is shared among all maps, so free just | |
811 | * on one of them. | |
812 | */ | |
813 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
814 | zfree((char **)&kmap->ref_reloc_sym->name); |
815 | zfree(&kmap->ref_reloc_sym); | |
816 | } else | |
817 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
818 | } |
819 | ||
e96e4078 | 820 | map__put(machine->vmlinux_maps[type]); |
3f067dca ACM |
821 | machine->vmlinux_maps[type] = NULL; |
822 | } | |
823 | } | |
824 | ||
876650e6 | 825 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
826 | { |
827 | int ret = 0; | |
828 | struct dirent **namelist = NULL; | |
829 | int i, items = 0; | |
830 | char path[PATH_MAX]; | |
831 | pid_t pid; | |
832 | char *endp; | |
833 | ||
834 | if (symbol_conf.default_guest_vmlinux_name || | |
835 | symbol_conf.default_guest_modules || | |
836 | symbol_conf.default_guest_kallsyms) { | |
837 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
838 | } | |
839 | ||
840 | if (symbol_conf.guestmount) { | |
841 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
842 | if (items <= 0) | |
843 | return -ENOENT; | |
844 | for (i = 0; i < items; i++) { | |
845 | if (!isdigit(namelist[i]->d_name[0])) { | |
846 | /* Filter out . and .. */ | |
847 | continue; | |
848 | } | |
849 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
850 | if ((*endp != '\0') || | |
851 | (endp == namelist[i]->d_name) || | |
852 | (errno == ERANGE)) { | |
853 | pr_debug("invalid directory (%s). Skipping.\n", | |
854 | namelist[i]->d_name); | |
855 | continue; | |
856 | } | |
857 | sprintf(path, "%s/%s/proc/kallsyms", | |
858 | symbol_conf.guestmount, | |
859 | namelist[i]->d_name); | |
860 | ret = access(path, R_OK); | |
861 | if (ret) { | |
862 | pr_debug("Can't access file %s\n", path); | |
863 | goto failure; | |
864 | } | |
865 | machines__create_kernel_maps(machines, pid); | |
866 | } | |
867 | failure: | |
868 | free(namelist); | |
869 | } | |
870 | ||
871 | return ret; | |
872 | } | |
873 | ||
876650e6 | 874 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 875 | { |
876650e6 ACM |
876 | struct rb_node *next = rb_first(&machines->guests); |
877 | ||
878 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
879 | |
880 | while (next) { | |
881 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
882 | ||
883 | next = rb_next(&pos->rb_node); | |
876650e6 | 884 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
885 | machine__delete(pos); |
886 | } | |
887 | } | |
888 | ||
876650e6 | 889 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
890 | { |
891 | struct machine *machine = machines__findnew(machines, pid); | |
892 | ||
893 | if (machine == NULL) | |
894 | return -1; | |
895 | ||
896 | return machine__create_kernel_maps(machine); | |
897 | } | |
898 | ||
e02092b9 | 899 | int __machine__load_kallsyms(struct machine *machine, const char *filename, |
be39db9f | 900 | enum map_type type, bool no_kcore) |
3f067dca | 901 | { |
a5e813c6 | 902 | struct map *map = machine__kernel_map(machine); |
be39db9f | 903 | int ret = __dso__load_kallsyms(map->dso, filename, map, no_kcore); |
3f067dca ACM |
904 | |
905 | if (ret > 0) { | |
906 | dso__set_loaded(map->dso, type); | |
907 | /* | |
908 | * Since /proc/kallsyms will have multiple sessions for the | |
909 | * kernel, with modules between them, fixup the end of all | |
910 | * sections. | |
911 | */ | |
912 | __map_groups__fixup_end(&machine->kmaps, type); | |
913 | } | |
914 | ||
915 | return ret; | |
916 | } | |
917 | ||
e02092b9 | 918 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
be39db9f | 919 | enum map_type type) |
e02092b9 | 920 | { |
be39db9f | 921 | return __machine__load_kallsyms(machine, filename, type, false); |
e02092b9 ACM |
922 | } |
923 | ||
be39db9f | 924 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type) |
3f067dca | 925 | { |
a5e813c6 | 926 | struct map *map = machine__kernel_map(machine); |
be39db9f | 927 | int ret = dso__load_vmlinux_path(map->dso, map); |
3f067dca | 928 | |
39b12f78 | 929 | if (ret > 0) |
3f067dca | 930 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
931 | |
932 | return ret; | |
933 | } | |
934 | ||
935 | static void map_groups__fixup_end(struct map_groups *mg) | |
936 | { | |
937 | int i; | |
938 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
939 | __map_groups__fixup_end(mg, i); | |
940 | } | |
941 | ||
942 | static char *get_kernel_version(const char *root_dir) | |
943 | { | |
944 | char version[PATH_MAX]; | |
945 | FILE *file; | |
946 | char *name, *tmp; | |
947 | const char *prefix = "Linux version "; | |
948 | ||
949 | sprintf(version, "%s/proc/version", root_dir); | |
950 | file = fopen(version, "r"); | |
951 | if (!file) | |
952 | return NULL; | |
953 | ||
954 | version[0] = '\0'; | |
955 | tmp = fgets(version, sizeof(version), file); | |
956 | fclose(file); | |
957 | ||
958 | name = strstr(version, prefix); | |
959 | if (!name) | |
960 | return NULL; | |
961 | name += strlen(prefix); | |
962 | tmp = strchr(name, ' '); | |
963 | if (tmp) | |
964 | *tmp = '\0'; | |
965 | ||
966 | return strdup(name); | |
967 | } | |
968 | ||
bb58a8a4 JO |
969 | static bool is_kmod_dso(struct dso *dso) |
970 | { | |
971 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
972 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
973 | } | |
974 | ||
975 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
976 | struct kmod_path *m) | |
977 | { | |
978 | struct map *map; | |
979 | char *long_name; | |
980 | ||
981 | map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name); | |
982 | if (map == NULL) | |
983 | return 0; | |
984 | ||
985 | long_name = strdup(path); | |
986 | if (long_name == NULL) | |
987 | return -ENOMEM; | |
988 | ||
989 | dso__set_long_name(map->dso, long_name, true); | |
990 | dso__kernel_module_get_build_id(map->dso, ""); | |
991 | ||
992 | /* | |
993 | * Full name could reveal us kmod compression, so | |
994 | * we need to update the symtab_type if needed. | |
995 | */ | |
996 | if (m->comp && is_kmod_dso(map->dso)) | |
997 | map->dso->symtab_type++; | |
998 | ||
999 | return 0; | |
1000 | } | |
1001 | ||
3f067dca | 1002 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 1003 | const char *dir_name, int depth) |
3f067dca ACM |
1004 | { |
1005 | struct dirent *dent; | |
1006 | DIR *dir = opendir(dir_name); | |
1007 | int ret = 0; | |
1008 | ||
1009 | if (!dir) { | |
1010 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
1011 | return -1; | |
1012 | } | |
1013 | ||
1014 | while ((dent = readdir(dir)) != NULL) { | |
1015 | char path[PATH_MAX]; | |
1016 | struct stat st; | |
1017 | ||
1018 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1019 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
1020 | if (stat(path, &st)) | |
1021 | continue; | |
1022 | ||
1023 | if (S_ISDIR(st.st_mode)) { | |
1024 | if (!strcmp(dent->d_name, ".") || | |
1025 | !strcmp(dent->d_name, "..")) | |
1026 | continue; | |
1027 | ||
61d4290c RY |
1028 | /* Do not follow top-level source and build symlinks */ |
1029 | if (depth == 0) { | |
1030 | if (!strcmp(dent->d_name, "source") || | |
1031 | !strcmp(dent->d_name, "build")) | |
1032 | continue; | |
1033 | } | |
1034 | ||
1035 | ret = map_groups__set_modules_path_dir(mg, path, | |
1036 | depth + 1); | |
3f067dca ACM |
1037 | if (ret < 0) |
1038 | goto out; | |
1039 | } else { | |
bb58a8a4 | 1040 | struct kmod_path m; |
3f067dca | 1041 | |
bb58a8a4 JO |
1042 | ret = kmod_path__parse_name(&m, dent->d_name); |
1043 | if (ret) | |
1044 | goto out; | |
c00c48fc | 1045 | |
bb58a8a4 JO |
1046 | if (m.kmod) |
1047 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 1048 | |
bb58a8a4 | 1049 | free(m.name); |
3f067dca | 1050 | |
bb58a8a4 | 1051 | if (ret) |
3f067dca | 1052 | goto out; |
3f067dca ACM |
1053 | } |
1054 | } | |
1055 | ||
1056 | out: | |
1057 | closedir(dir); | |
1058 | return ret; | |
1059 | } | |
1060 | ||
1061 | static int machine__set_modules_path(struct machine *machine) | |
1062 | { | |
1063 | char *version; | |
1064 | char modules_path[PATH_MAX]; | |
1065 | ||
1066 | version = get_kernel_version(machine->root_dir); | |
1067 | if (!version) | |
1068 | return -1; | |
1069 | ||
61d4290c | 1070 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1071 | machine->root_dir, version); |
1072 | free(version); | |
1073 | ||
61d4290c | 1074 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca | 1075 | } |
203d8a4a SSG |
1076 | int __weak arch__fix_module_text_start(u64 *start __maybe_unused, |
1077 | const char *name __maybe_unused) | |
1078 | { | |
1079 | return 0; | |
1080 | } | |
3f067dca | 1081 | |
316d70d6 | 1082 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 1083 | { |
316d70d6 | 1084 | struct machine *machine = arg; |
3f067dca | 1085 | struct map *map; |
316d70d6 | 1086 | |
203d8a4a SSG |
1087 | if (arch__fix_module_text_start(&start, name) < 0) |
1088 | return -1; | |
1089 | ||
9f2de315 | 1090 | map = machine__findnew_module_map(machine, start, name); |
316d70d6 AH |
1091 | if (map == NULL) |
1092 | return -1; | |
1093 | ||
1094 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static int machine__create_modules(struct machine *machine) | |
1100 | { | |
3f067dca ACM |
1101 | const char *modules; |
1102 | char path[PATH_MAX]; | |
1103 | ||
f4be904d | 1104 | if (machine__is_default_guest(machine)) { |
3f067dca | 1105 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1106 | } else { |
1107 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1108 | modules = path; |
1109 | } | |
1110 | ||
aa7fe3b0 | 1111 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1112 | return -1; |
1113 | ||
316d70d6 | 1114 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1115 | return -1; |
1116 | ||
316d70d6 AH |
1117 | if (!machine__set_modules_path(machine)) |
1118 | return 0; | |
3f067dca | 1119 | |
316d70d6 | 1120 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1121 | |
8f76fcd9 | 1122 | return 0; |
3f067dca ACM |
1123 | } |
1124 | ||
1125 | int machine__create_kernel_maps(struct machine *machine) | |
1126 | { | |
1127 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 1128 | const char *name; |
45e90056 | 1129 | u64 addr; |
1154c957 MH |
1130 | int ret; |
1131 | ||
45e90056 | 1132 | if (kernel == NULL) |
5512cf24 | 1133 | return -1; |
3f067dca | 1134 | |
1154c957 MH |
1135 | ret = __machine__create_kernel_maps(machine, kernel); |
1136 | dso__put(kernel); | |
1137 | if (ret < 0) | |
3f067dca ACM |
1138 | return -1; |
1139 | ||
1140 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1141 | if (machine__is_host(machine)) | |
1142 | pr_debug("Problems creating module maps, " | |
1143 | "continuing anyway...\n"); | |
1144 | else | |
1145 | pr_debug("Problems creating module maps for guest %d, " | |
1146 | "continuing anyway...\n", machine->pid); | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Now that we have all the maps created, just set the ->end of them: | |
1151 | */ | |
1152 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 | 1153 | |
45e90056 ACM |
1154 | addr = machine__get_running_kernel_start(machine, &name); |
1155 | if (!addr) { | |
1156 | } else if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, addr)) { | |
5512cf24 AH |
1157 | machine__destroy_kernel_maps(machine); |
1158 | return -1; | |
1159 | } | |
1160 | ||
3f067dca ACM |
1161 | return 0; |
1162 | } | |
1163 | ||
b0a7d1a0 ACM |
1164 | static void machine__set_kernel_mmap_len(struct machine *machine, |
1165 | union perf_event *event) | |
1166 | { | |
4552cf0f NK |
1167 | int i; |
1168 | ||
1169 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1170 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1171 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1172 | event->mmap.len); | |
1173 | /* | |
1174 | * Be a bit paranoid here, some perf.data file came with | |
1175 | * a zero sized synthesized MMAP event for the kernel. | |
1176 | */ | |
1177 | if (machine->vmlinux_maps[i]->end == 0) | |
1178 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1179 | } | |
b0a7d1a0 ACM |
1180 | } |
1181 | ||
8e0cf965 AH |
1182 | static bool machine__uses_kcore(struct machine *machine) |
1183 | { | |
1184 | struct dso *dso; | |
1185 | ||
3d39ac53 | 1186 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1187 | if (dso__is_kcore(dso)) |
1188 | return true; | |
1189 | } | |
1190 | ||
1191 | return false; | |
1192 | } | |
1193 | ||
b0a7d1a0 ACM |
1194 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1195 | union perf_event *event) | |
1196 | { | |
1197 | struct map *map; | |
1198 | char kmmap_prefix[PATH_MAX]; | |
1199 | enum dso_kernel_type kernel_type; | |
1200 | bool is_kernel_mmap; | |
1201 | ||
8e0cf965 AH |
1202 | /* If we have maps from kcore then we do not need or want any others */ |
1203 | if (machine__uses_kcore(machine)) | |
1204 | return 0; | |
1205 | ||
b0a7d1a0 ACM |
1206 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1207 | if (machine__is_host(machine)) | |
1208 | kernel_type = DSO_TYPE_KERNEL; | |
1209 | else | |
1210 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1211 | ||
1212 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1213 | kmmap_prefix, | |
1214 | strlen(kmmap_prefix) - 1) == 0; | |
1215 | if (event->mmap.filename[0] == '/' || | |
1216 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
9f2de315 ACM |
1217 | map = machine__findnew_module_map(machine, event->mmap.start, |
1218 | event->mmap.filename); | |
b0a7d1a0 ACM |
1219 | if (map == NULL) |
1220 | goto out_problem; | |
1221 | ||
b0a7d1a0 ACM |
1222 | map->end = map->start + event->mmap.len; |
1223 | } else if (is_kernel_mmap) { | |
1224 | const char *symbol_name = (event->mmap.filename + | |
1225 | strlen(kmmap_prefix)); | |
1226 | /* | |
1227 | * Should be there already, from the build-id table in | |
1228 | * the header. | |
1229 | */ | |
b837a8bd NK |
1230 | struct dso *kernel = NULL; |
1231 | struct dso *dso; | |
1232 | ||
e8807844 ACM |
1233 | pthread_rwlock_rdlock(&machine->dsos.lock); |
1234 | ||
3d39ac53 | 1235 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1236 | |
1237 | /* | |
1238 | * The cpumode passed to is_kernel_module is not the | |
1239 | * cpumode of *this* event. If we insist on passing | |
1240 | * correct cpumode to is_kernel_module, we should | |
1241 | * record the cpumode when we adding this dso to the | |
1242 | * linked list. | |
1243 | * | |
1244 | * However we don't really need passing correct | |
1245 | * cpumode. We know the correct cpumode must be kernel | |
1246 | * mode (if not, we should not link it onto kernel_dsos | |
1247 | * list). | |
1248 | * | |
1249 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1250 | * is_kernel_module() treats it as a kernel cpumode. | |
1251 | */ | |
1252 | ||
1253 | if (!dso->kernel || | |
1254 | is_kernel_module(dso->long_name, | |
1255 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1256 | continue; |
1257 | ||
1f121b03 | 1258 | |
b837a8bd NK |
1259 | kernel = dso; |
1260 | break; | |
1261 | } | |
1262 | ||
e8807844 ACM |
1263 | pthread_rwlock_unlock(&machine->dsos.lock); |
1264 | ||
b837a8bd | 1265 | if (kernel == NULL) |
aa7cc2ae | 1266 | kernel = machine__findnew_dso(machine, kmmap_prefix); |
b0a7d1a0 ACM |
1267 | if (kernel == NULL) |
1268 | goto out_problem; | |
1269 | ||
1270 | kernel->kernel = kernel_type; | |
d3a7c489 ACM |
1271 | if (__machine__create_kernel_maps(machine, kernel) < 0) { |
1272 | dso__put(kernel); | |
b0a7d1a0 | 1273 | goto out_problem; |
d3a7c489 | 1274 | } |
b0a7d1a0 | 1275 | |
330dfa22 NK |
1276 | if (strstr(kernel->long_name, "vmlinux")) |
1277 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1278 | |
b0a7d1a0 ACM |
1279 | machine__set_kernel_mmap_len(machine, event); |
1280 | ||
1281 | /* | |
1282 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1283 | * symbol. Effectively having zero here means that at record | |
1284 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1285 | */ | |
1286 | if (event->mmap.pgoff != 0) { | |
1287 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1288 | symbol_name, | |
1289 | event->mmap.pgoff); | |
1290 | } | |
1291 | ||
1292 | if (machine__is_default_guest(machine)) { | |
1293 | /* | |
1294 | * preload dso of guest kernel and modules | |
1295 | */ | |
be39db9f | 1296 | dso__load(kernel, machine__kernel_map(machine)); |
b0a7d1a0 ACM |
1297 | } |
1298 | } | |
1299 | return 0; | |
1300 | out_problem: | |
1301 | return -1; | |
1302 | } | |
1303 | ||
5c5e854b | 1304 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef | 1305 | union perf_event *event, |
473398a2 | 1306 | struct perf_sample *sample) |
5c5e854b | 1307 | { |
5c5e854b SE |
1308 | struct thread *thread; |
1309 | struct map *map; | |
1310 | enum map_type type; | |
1311 | int ret = 0; | |
1312 | ||
1313 | if (dump_trace) | |
1314 | perf_event__fprintf_mmap2(event, stdout); | |
1315 | ||
473398a2 ACM |
1316 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1317 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
5c5e854b SE |
1318 | ret = machine__process_kernel_mmap_event(machine, event); |
1319 | if (ret < 0) | |
1320 | goto out_problem; | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1325 | event->mmap2.tid); |
5c5e854b SE |
1326 | if (thread == NULL) |
1327 | goto out_problem; | |
1328 | ||
1329 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1330 | type = MAP__VARIABLE; | |
1331 | else | |
1332 | type = MAP__FUNCTION; | |
1333 | ||
2a03068c | 1334 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1335 | event->mmap2.len, event->mmap2.pgoff, |
1336 | event->mmap2.pid, event->mmap2.maj, | |
1337 | event->mmap2.min, event->mmap2.ino, | |
1338 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1339 | event->mmap2.prot, |
1340 | event->mmap2.flags, | |
5835edda | 1341 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1342 | |
1343 | if (map == NULL) | |
b91fc39f | 1344 | goto out_problem_map; |
5c5e854b | 1345 | |
8132a2a8 HK |
1346 | ret = thread__insert_map(thread, map); |
1347 | if (ret) | |
1348 | goto out_problem_insert; | |
1349 | ||
b91fc39f | 1350 | thread__put(thread); |
84c2cafa | 1351 | map__put(map); |
5c5e854b SE |
1352 | return 0; |
1353 | ||
8132a2a8 HK |
1354 | out_problem_insert: |
1355 | map__put(map); | |
b91fc39f ACM |
1356 | out_problem_map: |
1357 | thread__put(thread); | |
5c5e854b SE |
1358 | out_problem: |
1359 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1360 | return 0; | |
1361 | } | |
1362 | ||
162f0bef | 1363 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
473398a2 | 1364 | struct perf_sample *sample) |
b0a7d1a0 | 1365 | { |
b0a7d1a0 ACM |
1366 | struct thread *thread; |
1367 | struct map *map; | |
bad40917 | 1368 | enum map_type type; |
b0a7d1a0 ACM |
1369 | int ret = 0; |
1370 | ||
1371 | if (dump_trace) | |
1372 | perf_event__fprintf_mmap(event, stdout); | |
1373 | ||
473398a2 ACM |
1374 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1375 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
b0a7d1a0 ACM |
1376 | ret = machine__process_kernel_mmap_event(machine, event); |
1377 | if (ret < 0) | |
1378 | goto out_problem; | |
1379 | return 0; | |
1380 | } | |
1381 | ||
314add6b | 1382 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1383 | event->mmap.tid); |
b0a7d1a0 ACM |
1384 | if (thread == NULL) |
1385 | goto out_problem; | |
bad40917 SE |
1386 | |
1387 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1388 | type = MAP__VARIABLE; | |
1389 | else | |
1390 | type = MAP__FUNCTION; | |
1391 | ||
2a03068c | 1392 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1393 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1394 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1395 | event->mmap.filename, |
5835edda | 1396 | type, thread); |
bad40917 | 1397 | |
b0a7d1a0 | 1398 | if (map == NULL) |
b91fc39f | 1399 | goto out_problem_map; |
b0a7d1a0 | 1400 | |
8132a2a8 HK |
1401 | ret = thread__insert_map(thread, map); |
1402 | if (ret) | |
1403 | goto out_problem_insert; | |
1404 | ||
b91fc39f | 1405 | thread__put(thread); |
84c2cafa | 1406 | map__put(map); |
b0a7d1a0 ACM |
1407 | return 0; |
1408 | ||
8132a2a8 HK |
1409 | out_problem_insert: |
1410 | map__put(map); | |
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 | 1747 | struct ip_callchain *chain = sample->callchain; |
18ef15c6 | 1748 | int chain_nr = min(max_stack, (int)chain->nr), i; |
73dbcd65 | 1749 | u8 cpumode = PERF_RECORD_MISC_USER; |
384b6055 KL |
1750 | u64 ip; |
1751 | ||
1752 | for (i = 0; i < chain_nr; i++) { | |
1753 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
1754 | break; | |
1755 | } | |
1756 | ||
1757 | /* LBR only affects the user callchain */ | |
1758 | if (i != chain_nr) { | |
1759 | struct branch_stack *lbr_stack = sample->branch_stack; | |
18ef15c6 | 1760 | int lbr_nr = lbr_stack->nr, j; |
384b6055 KL |
1761 | /* |
1762 | * LBR callstack can only get user call chain. | |
1763 | * The mix_chain_nr is kernel call chain | |
1764 | * number plus LBR user call chain number. | |
1765 | * i is kernel call chain number, | |
1766 | * 1 is PERF_CONTEXT_USER, | |
1767 | * lbr_nr + 1 is the user call chain number. | |
1768 | * For details, please refer to the comments | |
1769 | * in callchain__printf | |
1770 | */ | |
1771 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
1772 | ||
384b6055 | 1773 | for (j = 0; j < mix_chain_nr; j++) { |
18ef15c6 | 1774 | int err; |
384b6055 KL |
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) { | |
be39db9f | 2098 | err = map__load(map); |
fbe2af45 AH |
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; | |
be39db9f | 2114 | struct symbol *sym = map_groups__find_symbol(&machine->kmaps, MAP__FUNCTION, *addrp, &map); |
c3168b0d ACM |
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 | } |