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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); |
69d2591a ACM |
35 | INIT_LIST_HEAD(&machine->dead_threads); |
36 | machine->last_match = NULL; | |
37 | ||
d027b640 | 38 | machine->vdso_info = NULL; |
4cde998d | 39 | machine->env = NULL; |
d027b640 | 40 | |
69d2591a ACM |
41 | machine->pid = pid; |
42 | ||
611a5ce8 | 43 | machine->symbol_filter = NULL; |
14bd6d20 | 44 | machine->id_hdr_size = 0; |
cfe1c414 | 45 | machine->comm_exec = false; |
fbe2af45 | 46 | machine->kernel_start = 0; |
611a5ce8 | 47 | |
cc1121ab MH |
48 | memset(machine->vmlinux_maps, 0, sizeof(machine->vmlinux_maps)); |
49 | ||
69d2591a ACM |
50 | machine->root_dir = strdup(root_dir); |
51 | if (machine->root_dir == NULL) | |
52 | return -ENOMEM; | |
53 | ||
54 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 55 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 56 | pid); |
69d2591a ACM |
57 | char comm[64]; |
58 | ||
59 | if (thread == NULL) | |
60 | return -ENOMEM; | |
61 | ||
62 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 63 | thread__set_comm(thread, comm, 0); |
b91fc39f | 64 | thread__put(thread); |
69d2591a ACM |
65 | } |
66 | ||
b9d266ba AH |
67 | machine->current_tid = NULL; |
68 | ||
69d2591a ACM |
69 | return 0; |
70 | } | |
71 | ||
8fb598e5 DA |
72 | struct machine *machine__new_host(void) |
73 | { | |
74 | struct machine *machine = malloc(sizeof(*machine)); | |
75 | ||
76 | if (machine != NULL) { | |
77 | machine__init(machine, "", HOST_KERNEL_ID); | |
78 | ||
79 | if (machine__create_kernel_maps(machine) < 0) | |
80 | goto out_delete; | |
81 | } | |
82 | ||
83 | return machine; | |
84 | out_delete: | |
85 | free(machine); | |
86 | return NULL; | |
87 | } | |
88 | ||
d3a7c489 | 89 | static void dsos__purge(struct dsos *dsos) |
69d2591a ACM |
90 | { |
91 | struct dso *pos, *n; | |
92 | ||
e8807844 ACM |
93 | pthread_rwlock_wrlock(&dsos->lock); |
94 | ||
8fa7d87f | 95 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 96 | RB_CLEAR_NODE(&pos->rb_node); |
e266a753 | 97 | pos->root = NULL; |
d3a7c489 ACM |
98 | list_del_init(&pos->node); |
99 | dso__put(pos); | |
69d2591a | 100 | } |
e8807844 ACM |
101 | |
102 | pthread_rwlock_unlock(&dsos->lock); | |
d3a7c489 | 103 | } |
e8807844 | 104 | |
d3a7c489 ACM |
105 | static void dsos__exit(struct dsos *dsos) |
106 | { | |
107 | dsos__purge(dsos); | |
e8807844 | 108 | pthread_rwlock_destroy(&dsos->lock); |
69d2591a ACM |
109 | } |
110 | ||
3f067dca ACM |
111 | void machine__delete_threads(struct machine *machine) |
112 | { | |
b91fc39f | 113 | struct rb_node *nd; |
3f067dca | 114 | |
b91fc39f ACM |
115 | pthread_rwlock_wrlock(&machine->threads_lock); |
116 | nd = rb_first(&machine->threads); | |
3f067dca ACM |
117 | while (nd) { |
118 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
119 | ||
3f067dca | 120 | nd = rb_next(nd); |
b91fc39f | 121 | __machine__remove_thread(machine, t, false); |
3f067dca | 122 | } |
b91fc39f | 123 | pthread_rwlock_unlock(&machine->threads_lock); |
3f067dca ACM |
124 | } |
125 | ||
69d2591a ACM |
126 | void machine__exit(struct machine *machine) |
127 | { | |
ebe9729c | 128 | machine__destroy_kernel_maps(machine); |
69d2591a | 129 | map_groups__exit(&machine->kmaps); |
e8807844 | 130 | dsos__exit(&machine->dsos); |
9a4388c7 | 131 | machine__exit_vdso(machine); |
04662523 | 132 | zfree(&machine->root_dir); |
b9d266ba | 133 | zfree(&machine->current_tid); |
b91fc39f | 134 | pthread_rwlock_destroy(&machine->threads_lock); |
69d2591a ACM |
135 | } |
136 | ||
137 | void machine__delete(struct machine *machine) | |
138 | { | |
139 | machine__exit(machine); | |
140 | free(machine); | |
141 | } | |
142 | ||
876650e6 ACM |
143 | void machines__init(struct machines *machines) |
144 | { | |
145 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
146 | machines->guests = RB_ROOT; | |
611a5ce8 | 147 | machines->symbol_filter = NULL; |
876650e6 ACM |
148 | } |
149 | ||
150 | void machines__exit(struct machines *machines) | |
151 | { | |
152 | machine__exit(&machines->host); | |
153 | /* XXX exit guest */ | |
154 | } | |
155 | ||
156 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
157 | const char *root_dir) |
158 | { | |
876650e6 | 159 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
160 | struct rb_node *parent = NULL; |
161 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
162 | ||
163 | if (machine == NULL) | |
164 | return NULL; | |
165 | ||
166 | if (machine__init(machine, root_dir, pid) != 0) { | |
167 | free(machine); | |
168 | return NULL; | |
169 | } | |
170 | ||
611a5ce8 AH |
171 | machine->symbol_filter = machines->symbol_filter; |
172 | ||
69d2591a ACM |
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 | ||
611a5ce8 AH |
188 | void machines__set_symbol_filter(struct machines *machines, |
189 | symbol_filter_t symbol_filter) | |
190 | { | |
191 | struct rb_node *nd; | |
192 | ||
193 | machines->symbol_filter = symbol_filter; | |
194 | machines->host.symbol_filter = symbol_filter; | |
195 | ||
196 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
197 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
198 | ||
199 | machine->symbol_filter = symbol_filter; | |
200 | } | |
201 | } | |
202 | ||
cfe1c414 AH |
203 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
204 | { | |
205 | struct rb_node *nd; | |
206 | ||
207 | machines->host.comm_exec = comm_exec; | |
208 | ||
209 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
210 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
211 | ||
212 | machine->comm_exec = comm_exec; | |
213 | } | |
214 | } | |
215 | ||
876650e6 | 216 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 217 | { |
876650e6 | 218 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
219 | struct rb_node *parent = NULL; |
220 | struct machine *machine; | |
221 | struct machine *default_machine = NULL; | |
222 | ||
876650e6 ACM |
223 | if (pid == HOST_KERNEL_ID) |
224 | return &machines->host; | |
225 | ||
69d2591a ACM |
226 | while (*p != NULL) { |
227 | parent = *p; | |
228 | machine = rb_entry(parent, struct machine, rb_node); | |
229 | if (pid < machine->pid) | |
230 | p = &(*p)->rb_left; | |
231 | else if (pid > machine->pid) | |
232 | p = &(*p)->rb_right; | |
233 | else | |
234 | return machine; | |
235 | if (!machine->pid) | |
236 | default_machine = machine; | |
237 | } | |
238 | ||
239 | return default_machine; | |
240 | } | |
241 | ||
876650e6 | 242 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
243 | { |
244 | char path[PATH_MAX]; | |
245 | const char *root_dir = ""; | |
246 | struct machine *machine = machines__find(machines, pid); | |
247 | ||
248 | if (machine && (machine->pid == pid)) | |
249 | goto out; | |
250 | ||
251 | if ((pid != HOST_KERNEL_ID) && | |
252 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
253 | (symbol_conf.guestmount)) { | |
254 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
255 | if (access(path, R_OK)) { | |
256 | static struct strlist *seen; | |
257 | ||
258 | if (!seen) | |
4a77e218 | 259 | seen = strlist__new(NULL, NULL); |
69d2591a ACM |
260 | |
261 | if (!strlist__has_entry(seen, path)) { | |
262 | pr_err("Can't access file %s\n", path); | |
263 | strlist__add(seen, path); | |
264 | } | |
265 | machine = NULL; | |
266 | goto out; | |
267 | } | |
268 | root_dir = path; | |
269 | } | |
270 | ||
271 | machine = machines__add(machines, pid, root_dir); | |
272 | out: | |
273 | return machine; | |
274 | } | |
275 | ||
876650e6 ACM |
276 | void machines__process_guests(struct machines *machines, |
277 | machine__process_t process, void *data) | |
69d2591a ACM |
278 | { |
279 | struct rb_node *nd; | |
280 | ||
876650e6 | 281 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
282 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
283 | process(pos, data); | |
284 | } | |
285 | } | |
286 | ||
287 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
288 | { | |
289 | if (machine__is_host(machine)) | |
290 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
291 | else if (machine__is_default_guest(machine)) | |
292 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
293 | else { | |
294 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
295 | machine->pid); | |
296 | } | |
297 | ||
298 | return bf; | |
299 | } | |
300 | ||
876650e6 | 301 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
302 | { |
303 | struct rb_node *node; | |
304 | struct machine *machine; | |
305 | ||
876650e6 ACM |
306 | machines->host.id_hdr_size = id_hdr_size; |
307 | ||
308 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
309 | machine = rb_entry(node, struct machine, rb_node); |
310 | machine->id_hdr_size = id_hdr_size; | |
311 | } | |
312 | ||
313 | return; | |
314 | } | |
315 | ||
29ce3612 AH |
316 | static void machine__update_thread_pid(struct machine *machine, |
317 | struct thread *th, pid_t pid) | |
318 | { | |
319 | struct thread *leader; | |
320 | ||
321 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
322 | return; | |
323 | ||
324 | th->pid_ = pid; | |
325 | ||
326 | if (th->pid_ == th->tid) | |
327 | return; | |
328 | ||
b91fc39f | 329 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
330 | if (!leader) |
331 | goto out_err; | |
332 | ||
333 | if (!leader->mg) | |
11246c70 | 334 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
335 | |
336 | if (!leader->mg) | |
337 | goto out_err; | |
338 | ||
339 | if (th->mg == leader->mg) | |
340 | return; | |
341 | ||
342 | if (th->mg) { | |
343 | /* | |
344 | * Maps are created from MMAP events which provide the pid and | |
345 | * tid. Consequently there never should be any maps on a thread | |
346 | * with an unknown pid. Just print an error if there are. | |
347 | */ | |
348 | if (!map_groups__empty(th->mg)) | |
349 | pr_err("Discarding thread maps for %d:%d\n", | |
350 | th->pid_, th->tid); | |
8e160b2e | 351 | map_groups__put(th->mg); |
29ce3612 AH |
352 | } |
353 | ||
354 | th->mg = map_groups__get(leader->mg); | |
355 | ||
356 | return; | |
357 | ||
358 | out_err: | |
359 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
360 | } | |
361 | ||
b91fc39f ACM |
362 | static struct thread *____machine__findnew_thread(struct machine *machine, |
363 | pid_t pid, pid_t tid, | |
364 | bool create) | |
9d2f8e22 ACM |
365 | { |
366 | struct rb_node **p = &machine->threads.rb_node; | |
367 | struct rb_node *parent = NULL; | |
368 | struct thread *th; | |
369 | ||
370 | /* | |
38051234 | 371 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
372 | * so most of the time we dont have to look up |
373 | * the full rbtree: | |
374 | */ | |
29ce3612 | 375 | th = machine->last_match; |
f3b623b8 ACM |
376 | if (th != NULL) { |
377 | if (th->tid == tid) { | |
378 | machine__update_thread_pid(machine, th, pid); | |
379 | return th; | |
380 | } | |
381 | ||
0ceb8f6e | 382 | machine->last_match = NULL; |
99d725fc | 383 | } |
9d2f8e22 ACM |
384 | |
385 | while (*p != NULL) { | |
386 | parent = *p; | |
387 | th = rb_entry(parent, struct thread, rb_node); | |
388 | ||
38051234 | 389 | if (th->tid == tid) { |
0ceb8f6e | 390 | machine->last_match = th; |
29ce3612 | 391 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
392 | return th; |
393 | } | |
394 | ||
38051234 | 395 | if (tid < th->tid) |
9d2f8e22 ACM |
396 | p = &(*p)->rb_left; |
397 | else | |
398 | p = &(*p)->rb_right; | |
399 | } | |
400 | ||
401 | if (!create) | |
402 | return NULL; | |
403 | ||
99d725fc | 404 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
405 | if (th != NULL) { |
406 | rb_link_node(&th->rb_node, parent, p); | |
407 | rb_insert_color(&th->rb_node, &machine->threads); | |
cddcef60 JO |
408 | |
409 | /* | |
410 | * We have to initialize map_groups separately | |
411 | * after rb tree is updated. | |
412 | * | |
413 | * The reason is that we call machine__findnew_thread | |
414 | * within thread__init_map_groups to find the thread | |
415 | * leader and that would screwed the rb tree. | |
416 | */ | |
418029b7 | 417 | if (thread__init_map_groups(th, machine)) { |
0170b14f | 418 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 419 | RB_CLEAR_NODE(&th->rb_node); |
418029b7 | 420 | thread__delete(th); |
cddcef60 | 421 | return NULL; |
418029b7 | 422 | } |
f3b623b8 ACM |
423 | /* |
424 | * It is now in the rbtree, get a ref | |
425 | */ | |
426 | thread__get(th); | |
0ceb8f6e | 427 | machine->last_match = th; |
9d2f8e22 ACM |
428 | } |
429 | ||
430 | return th; | |
431 | } | |
432 | ||
b91fc39f ACM |
433 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
434 | { | |
435 | return ____machine__findnew_thread(machine, pid, tid, true); | |
436 | } | |
437 | ||
314add6b AH |
438 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
439 | pid_t tid) | |
9d2f8e22 | 440 | { |
b91fc39f ACM |
441 | struct thread *th; |
442 | ||
443 | pthread_rwlock_wrlock(&machine->threads_lock); | |
444 | th = thread__get(__machine__findnew_thread(machine, pid, tid)); | |
445 | pthread_rwlock_unlock(&machine->threads_lock); | |
446 | return th; | |
9d2f8e22 ACM |
447 | } |
448 | ||
d75e6097 JO |
449 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
450 | pid_t tid) | |
9d2f8e22 | 451 | { |
b91fc39f ACM |
452 | struct thread *th; |
453 | pthread_rwlock_rdlock(&machine->threads_lock); | |
454 | th = thread__get(____machine__findnew_thread(machine, pid, tid, false)); | |
455 | pthread_rwlock_unlock(&machine->threads_lock); | |
456 | return th; | |
9d2f8e22 | 457 | } |
b0a7d1a0 | 458 | |
cfe1c414 AH |
459 | struct comm *machine__thread_exec_comm(struct machine *machine, |
460 | struct thread *thread) | |
461 | { | |
462 | if (machine->comm_exec) | |
463 | return thread__exec_comm(thread); | |
464 | else | |
465 | return thread__comm(thread); | |
466 | } | |
467 | ||
162f0bef FW |
468 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
469 | struct perf_sample *sample) | |
b0a7d1a0 | 470 | { |
314add6b AH |
471 | struct thread *thread = machine__findnew_thread(machine, |
472 | event->comm.pid, | |
473 | event->comm.tid); | |
65de51f9 | 474 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 475 | int err = 0; |
b0a7d1a0 | 476 | |
cfe1c414 AH |
477 | if (exec) |
478 | machine->comm_exec = true; | |
479 | ||
b0a7d1a0 ACM |
480 | if (dump_trace) |
481 | perf_event__fprintf_comm(event, stdout); | |
482 | ||
65de51f9 AH |
483 | if (thread == NULL || |
484 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 485 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 486 | err = -1; |
b0a7d1a0 ACM |
487 | } |
488 | ||
b91fc39f ACM |
489 | thread__put(thread); |
490 | ||
491 | return err; | |
b0a7d1a0 ACM |
492 | } |
493 | ||
494 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 495 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
496 | { |
497 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
498 | event->lost.id, event->lost.lost); | |
499 | return 0; | |
500 | } | |
501 | ||
c4937a91 KL |
502 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
503 | union perf_event *event, struct perf_sample *sample) | |
504 | { | |
505 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n", | |
506 | sample->id, event->lost_samples.lost); | |
507 | return 0; | |
508 | } | |
509 | ||
9f2de315 ACM |
510 | static struct dso *machine__findnew_module_dso(struct machine *machine, |
511 | struct kmod_path *m, | |
512 | const char *filename) | |
da17ea33 JO |
513 | { |
514 | struct dso *dso; | |
da17ea33 | 515 | |
e8807844 ACM |
516 | pthread_rwlock_wrlock(&machine->dsos.lock); |
517 | ||
518 | dso = __dsos__find(&machine->dsos, m->name, true); | |
da17ea33 | 519 | if (!dso) { |
e8807844 | 520 | dso = __dsos__addnew(&machine->dsos, m->name); |
da17ea33 | 521 | if (dso == NULL) |
e8807844 | 522 | goto out_unlock; |
da17ea33 JO |
523 | |
524 | if (machine__is_host(machine)) | |
525 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
526 | else | |
527 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
528 | ||
529 | /* _KMODULE_COMP should be next to _KMODULE */ | |
ca33380a | 530 | if (m->kmod && m->comp) |
da17ea33 | 531 | dso->symtab_type++; |
ca33380a JO |
532 | |
533 | dso__set_short_name(dso, strdup(m->name), true); | |
534 | dso__set_long_name(dso, strdup(filename), true); | |
da17ea33 JO |
535 | } |
536 | ||
d3a7c489 | 537 | dso__get(dso); |
e8807844 ACM |
538 | out_unlock: |
539 | pthread_rwlock_unlock(&machine->dsos.lock); | |
da17ea33 JO |
540 | return dso; |
541 | } | |
542 | ||
4a96f7a0 AH |
543 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
544 | union perf_event *event) | |
545 | { | |
546 | if (dump_trace) | |
547 | perf_event__fprintf_aux(event, stdout); | |
548 | return 0; | |
549 | } | |
550 | ||
0ad21f68 AH |
551 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
552 | union perf_event *event) | |
553 | { | |
554 | if (dump_trace) | |
555 | perf_event__fprintf_itrace_start(event, stdout); | |
556 | return 0; | |
557 | } | |
558 | ||
0286039f AH |
559 | int machine__process_switch_event(struct machine *machine __maybe_unused, |
560 | union perf_event *event) | |
561 | { | |
562 | if (dump_trace) | |
563 | perf_event__fprintf_switch(event, stdout); | |
564 | return 0; | |
565 | } | |
566 | ||
c03d5184 WN |
567 | static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename) |
568 | { | |
569 | const char *dup_filename; | |
570 | ||
571 | if (!filename || !dso || !dso->long_name) | |
572 | return; | |
573 | if (dso->long_name[0] != '[') | |
574 | return; | |
575 | if (!strchr(filename, '/')) | |
576 | return; | |
577 | ||
578 | dup_filename = strdup(filename); | |
579 | if (!dup_filename) | |
580 | return; | |
581 | ||
5dcf16df | 582 | dso__set_long_name(dso, dup_filename, true); |
c03d5184 WN |
583 | } |
584 | ||
9f2de315 ACM |
585 | struct map *machine__findnew_module_map(struct machine *machine, u64 start, |
586 | const char *filename) | |
3f067dca | 587 | { |
ca33380a | 588 | struct map *map = NULL; |
566c69c3 | 589 | struct dso *dso = NULL; |
ca33380a | 590 | struct kmod_path m; |
3f067dca | 591 | |
ca33380a | 592 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
593 | return NULL; |
594 | ||
bc84f464 JO |
595 | map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, |
596 | m.name); | |
c03d5184 WN |
597 | if (map) { |
598 | /* | |
599 | * If the map's dso is an offline module, give dso__load() | |
600 | * a chance to find the file path of that module by fixing | |
601 | * long_name. | |
602 | */ | |
603 | dso__adjust_kmod_long_name(map->dso, filename); | |
bc84f464 | 604 | goto out; |
c03d5184 | 605 | } |
bc84f464 | 606 | |
9f2de315 | 607 | dso = machine__findnew_module_dso(machine, &m, filename); |
ca33380a JO |
608 | if (dso == NULL) |
609 | goto out; | |
610 | ||
3f067dca ACM |
611 | map = map__new2(start, dso, MAP__FUNCTION); |
612 | if (map == NULL) | |
ca33380a | 613 | goto out; |
3f067dca | 614 | |
3f067dca | 615 | map_groups__insert(&machine->kmaps, map); |
ca33380a | 616 | |
9afcb420 MH |
617 | /* Put the map here because map_groups__insert alread got it */ |
618 | map__put(map); | |
ca33380a | 619 | out: |
566c69c3 MH |
620 | /* put the dso here, corresponding to machine__findnew_module_dso */ |
621 | dso__put(dso); | |
ca33380a | 622 | free(m.name); |
3f067dca ACM |
623 | return map; |
624 | } | |
625 | ||
876650e6 | 626 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
627 | { |
628 | struct rb_node *nd; | |
3d39ac53 | 629 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 630 | |
876650e6 | 631 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 632 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 633 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
634 | } |
635 | ||
636 | return ret; | |
637 | } | |
638 | ||
8fa7d87f | 639 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
640 | bool (skip)(struct dso *dso, int parm), int parm) |
641 | { | |
3d39ac53 | 642 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
643 | } |
644 | ||
876650e6 | 645 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
646 | bool (skip)(struct dso *dso, int parm), int parm) |
647 | { | |
648 | struct rb_node *nd; | |
876650e6 | 649 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 650 | |
876650e6 | 651 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
652 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
653 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
654 | } | |
655 | return ret; | |
656 | } | |
657 | ||
658 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
659 | { | |
660 | int i; | |
661 | size_t printed = 0; | |
a5e813c6 | 662 | struct dso *kdso = machine__kernel_map(machine)->dso; |
3f067dca ACM |
663 | |
664 | if (kdso->has_build_id) { | |
665 | char filename[PATH_MAX]; | |
666 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
667 | printed += fprintf(fp, "[0] %s\n", filename); | |
668 | } | |
669 | ||
670 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
671 | printed += fprintf(fp, "[%d] %s\n", | |
672 | i + kdso->has_build_id, vmlinux_path[i]); | |
673 | ||
674 | return printed; | |
675 | } | |
676 | ||
677 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
678 | { | |
679 | size_t ret = 0; | |
680 | struct rb_node *nd; | |
681 | ||
b91fc39f ACM |
682 | pthread_rwlock_rdlock(&machine->threads_lock); |
683 | ||
3f067dca ACM |
684 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { |
685 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
686 | ||
687 | ret += thread__fprintf(pos, fp); | |
688 | } | |
689 | ||
b91fc39f ACM |
690 | pthread_rwlock_unlock(&machine->threads_lock); |
691 | ||
3f067dca ACM |
692 | return ret; |
693 | } | |
694 | ||
695 | static struct dso *machine__get_kernel(struct machine *machine) | |
696 | { | |
697 | const char *vmlinux_name = NULL; | |
698 | struct dso *kernel; | |
699 | ||
700 | if (machine__is_host(machine)) { | |
701 | vmlinux_name = symbol_conf.vmlinux_name; | |
702 | if (!vmlinux_name) | |
703 | vmlinux_name = "[kernel.kallsyms]"; | |
704 | ||
459ce518 ACM |
705 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
706 | "[kernel]", DSO_TYPE_KERNEL); | |
3f067dca ACM |
707 | } else { |
708 | char bf[PATH_MAX]; | |
709 | ||
710 | if (machine__is_default_guest(machine)) | |
711 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
712 | if (!vmlinux_name) | |
713 | vmlinux_name = machine__mmap_name(machine, bf, | |
714 | sizeof(bf)); | |
715 | ||
459ce518 ACM |
716 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
717 | "[guest.kernel]", | |
718 | DSO_TYPE_GUEST_KERNEL); | |
3f067dca ACM |
719 | } |
720 | ||
721 | if (kernel != NULL && (!kernel->has_build_id)) | |
722 | dso__read_running_kernel_build_id(kernel, machine); | |
723 | ||
724 | return kernel; | |
725 | } | |
726 | ||
727 | struct process_args { | |
728 | u64 start; | |
729 | }; | |
730 | ||
15a0a870 AH |
731 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
732 | size_t bufsz) | |
733 | { | |
734 | if (machine__is_default_guest(machine)) | |
735 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
736 | else | |
737 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
738 | } | |
739 | ||
a93f0e55 SQ |
740 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
741 | ||
742 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
743 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
744 | * symbol_name if it's not that important. | |
745 | */ | |
4b99375b AH |
746 | static u64 machine__get_running_kernel_start(struct machine *machine, |
747 | const char **symbol_name) | |
3f067dca | 748 | { |
15a0a870 | 749 | char filename[PATH_MAX]; |
a93f0e55 SQ |
750 | int i; |
751 | const char *name; | |
752 | u64 addr = 0; | |
3f067dca | 753 | |
15a0a870 | 754 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
755 | |
756 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
757 | return 0; | |
758 | ||
a93f0e55 SQ |
759 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
760 | addr = kallsyms__get_function_start(filename, name); | |
761 | if (addr) | |
762 | break; | |
763 | } | |
764 | ||
765 | if (symbol_name) | |
766 | *symbol_name = name; | |
3f067dca | 767 | |
a93f0e55 | 768 | return addr; |
3f067dca ACM |
769 | } |
770 | ||
771 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
772 | { | |
773 | enum map_type type; | |
4b99375b | 774 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca | 775 | |
cc1121ab MH |
776 | /* In case of renewal the kernel map, destroy previous one */ |
777 | machine__destroy_kernel_maps(machine); | |
778 | ||
3f067dca ACM |
779 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
780 | struct kmap *kmap; | |
77e65977 | 781 | struct map *map; |
3f067dca ACM |
782 | |
783 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
784 | if (machine->vmlinux_maps[type] == NULL) | |
785 | return -1; | |
786 | ||
787 | machine->vmlinux_maps[type]->map_ip = | |
788 | machine->vmlinux_maps[type]->unmap_ip = | |
789 | identity__map_ip; | |
a5e813c6 | 790 | map = __machine__kernel_map(machine, type); |
77e65977 | 791 | kmap = map__kmap(map); |
ba92732e WN |
792 | if (!kmap) |
793 | return -1; | |
794 | ||
3f067dca | 795 | kmap->kmaps = &machine->kmaps; |
77e65977 | 796 | map_groups__insert(&machine->kmaps, map); |
3f067dca ACM |
797 | } |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | void machine__destroy_kernel_maps(struct machine *machine) | |
803 | { | |
804 | enum map_type type; | |
805 | ||
806 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
807 | struct kmap *kmap; | |
a5e813c6 | 808 | struct map *map = __machine__kernel_map(machine, type); |
3f067dca | 809 | |
77e65977 | 810 | if (map == NULL) |
3f067dca ACM |
811 | continue; |
812 | ||
77e65977 ACM |
813 | kmap = map__kmap(map); |
814 | map_groups__remove(&machine->kmaps, map); | |
ba92732e | 815 | if (kmap && kmap->ref_reloc_sym) { |
3f067dca ACM |
816 | /* |
817 | * ref_reloc_sym is shared among all maps, so free just | |
818 | * on one of them. | |
819 | */ | |
820 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
821 | zfree((char **)&kmap->ref_reloc_sym->name); |
822 | zfree(&kmap->ref_reloc_sym); | |
823 | } else | |
824 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
825 | } |
826 | ||
e96e4078 | 827 | map__put(machine->vmlinux_maps[type]); |
3f067dca ACM |
828 | machine->vmlinux_maps[type] = NULL; |
829 | } | |
830 | } | |
831 | ||
876650e6 | 832 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
833 | { |
834 | int ret = 0; | |
835 | struct dirent **namelist = NULL; | |
836 | int i, items = 0; | |
837 | char path[PATH_MAX]; | |
838 | pid_t pid; | |
839 | char *endp; | |
840 | ||
841 | if (symbol_conf.default_guest_vmlinux_name || | |
842 | symbol_conf.default_guest_modules || | |
843 | symbol_conf.default_guest_kallsyms) { | |
844 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
845 | } | |
846 | ||
847 | if (symbol_conf.guestmount) { | |
848 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
849 | if (items <= 0) | |
850 | return -ENOENT; | |
851 | for (i = 0; i < items; i++) { | |
852 | if (!isdigit(namelist[i]->d_name[0])) { | |
853 | /* Filter out . and .. */ | |
854 | continue; | |
855 | } | |
856 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
857 | if ((*endp != '\0') || | |
858 | (endp == namelist[i]->d_name) || | |
859 | (errno == ERANGE)) { | |
860 | pr_debug("invalid directory (%s). Skipping.\n", | |
861 | namelist[i]->d_name); | |
862 | continue; | |
863 | } | |
864 | sprintf(path, "%s/%s/proc/kallsyms", | |
865 | symbol_conf.guestmount, | |
866 | namelist[i]->d_name); | |
867 | ret = access(path, R_OK); | |
868 | if (ret) { | |
869 | pr_debug("Can't access file %s\n", path); | |
870 | goto failure; | |
871 | } | |
872 | machines__create_kernel_maps(machines, pid); | |
873 | } | |
874 | failure: | |
875 | free(namelist); | |
876 | } | |
877 | ||
878 | return ret; | |
879 | } | |
880 | ||
876650e6 | 881 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 882 | { |
876650e6 ACM |
883 | struct rb_node *next = rb_first(&machines->guests); |
884 | ||
885 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
886 | |
887 | while (next) { | |
888 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
889 | ||
890 | next = rb_next(&pos->rb_node); | |
876650e6 | 891 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
892 | machine__delete(pos); |
893 | } | |
894 | } | |
895 | ||
876650e6 | 896 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
897 | { |
898 | struct machine *machine = machines__findnew(machines, pid); | |
899 | ||
900 | if (machine == NULL) | |
901 | return -1; | |
902 | ||
903 | return machine__create_kernel_maps(machine); | |
904 | } | |
905 | ||
906 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
907 | enum map_type type, symbol_filter_t filter) | |
908 | { | |
a5e813c6 | 909 | struct map *map = machine__kernel_map(machine); |
3f067dca ACM |
910 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
911 | ||
912 | if (ret > 0) { | |
913 | dso__set_loaded(map->dso, type); | |
914 | /* | |
915 | * Since /proc/kallsyms will have multiple sessions for the | |
916 | * kernel, with modules between them, fixup the end of all | |
917 | * sections. | |
918 | */ | |
919 | __map_groups__fixup_end(&machine->kmaps, type); | |
920 | } | |
921 | ||
922 | return ret; | |
923 | } | |
924 | ||
925 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
926 | symbol_filter_t filter) | |
927 | { | |
a5e813c6 | 928 | struct map *map = machine__kernel_map(machine); |
3f067dca ACM |
929 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
930 | ||
39b12f78 | 931 | if (ret > 0) |
3f067dca | 932 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
933 | |
934 | return ret; | |
935 | } | |
936 | ||
937 | static void map_groups__fixup_end(struct map_groups *mg) | |
938 | { | |
939 | int i; | |
940 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
941 | __map_groups__fixup_end(mg, i); | |
942 | } | |
943 | ||
944 | static char *get_kernel_version(const char *root_dir) | |
945 | { | |
946 | char version[PATH_MAX]; | |
947 | FILE *file; | |
948 | char *name, *tmp; | |
949 | const char *prefix = "Linux version "; | |
950 | ||
951 | sprintf(version, "%s/proc/version", root_dir); | |
952 | file = fopen(version, "r"); | |
953 | if (!file) | |
954 | return NULL; | |
955 | ||
956 | version[0] = '\0'; | |
957 | tmp = fgets(version, sizeof(version), file); | |
958 | fclose(file); | |
959 | ||
960 | name = strstr(version, prefix); | |
961 | if (!name) | |
962 | return NULL; | |
963 | name += strlen(prefix); | |
964 | tmp = strchr(name, ' '); | |
965 | if (tmp) | |
966 | *tmp = '\0'; | |
967 | ||
968 | return strdup(name); | |
969 | } | |
970 | ||
bb58a8a4 JO |
971 | static bool is_kmod_dso(struct dso *dso) |
972 | { | |
973 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
974 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
975 | } | |
976 | ||
977 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
978 | struct kmod_path *m) | |
979 | { | |
980 | struct map *map; | |
981 | char *long_name; | |
982 | ||
983 | map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name); | |
984 | if (map == NULL) | |
985 | return 0; | |
986 | ||
987 | long_name = strdup(path); | |
988 | if (long_name == NULL) | |
989 | return -ENOMEM; | |
990 | ||
991 | dso__set_long_name(map->dso, long_name, true); | |
992 | dso__kernel_module_get_build_id(map->dso, ""); | |
993 | ||
994 | /* | |
995 | * Full name could reveal us kmod compression, so | |
996 | * we need to update the symtab_type if needed. | |
997 | */ | |
998 | if (m->comp && is_kmod_dso(map->dso)) | |
999 | map->dso->symtab_type++; | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
3f067dca | 1004 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 1005 | const char *dir_name, int depth) |
3f067dca ACM |
1006 | { |
1007 | struct dirent *dent; | |
1008 | DIR *dir = opendir(dir_name); | |
1009 | int ret = 0; | |
1010 | ||
1011 | if (!dir) { | |
1012 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
1013 | return -1; | |
1014 | } | |
1015 | ||
1016 | while ((dent = readdir(dir)) != NULL) { | |
1017 | char path[PATH_MAX]; | |
1018 | struct stat st; | |
1019 | ||
1020 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1021 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
1022 | if (stat(path, &st)) | |
1023 | continue; | |
1024 | ||
1025 | if (S_ISDIR(st.st_mode)) { | |
1026 | if (!strcmp(dent->d_name, ".") || | |
1027 | !strcmp(dent->d_name, "..")) | |
1028 | continue; | |
1029 | ||
61d4290c RY |
1030 | /* Do not follow top-level source and build symlinks */ |
1031 | if (depth == 0) { | |
1032 | if (!strcmp(dent->d_name, "source") || | |
1033 | !strcmp(dent->d_name, "build")) | |
1034 | continue; | |
1035 | } | |
1036 | ||
1037 | ret = map_groups__set_modules_path_dir(mg, path, | |
1038 | depth + 1); | |
3f067dca ACM |
1039 | if (ret < 0) |
1040 | goto out; | |
1041 | } else { | |
bb58a8a4 | 1042 | struct kmod_path m; |
3f067dca | 1043 | |
bb58a8a4 JO |
1044 | ret = kmod_path__parse_name(&m, dent->d_name); |
1045 | if (ret) | |
1046 | goto out; | |
c00c48fc | 1047 | |
bb58a8a4 JO |
1048 | if (m.kmod) |
1049 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 1050 | |
bb58a8a4 | 1051 | free(m.name); |
3f067dca | 1052 | |
bb58a8a4 | 1053 | if (ret) |
3f067dca | 1054 | goto out; |
3f067dca ACM |
1055 | } |
1056 | } | |
1057 | ||
1058 | out: | |
1059 | closedir(dir); | |
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | static int machine__set_modules_path(struct machine *machine) | |
1064 | { | |
1065 | char *version; | |
1066 | char modules_path[PATH_MAX]; | |
1067 | ||
1068 | version = get_kernel_version(machine->root_dir); | |
1069 | if (!version) | |
1070 | return -1; | |
1071 | ||
61d4290c | 1072 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1073 | machine->root_dir, version); |
1074 | free(version); | |
1075 | ||
61d4290c | 1076 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
1077 | } |
1078 | ||
316d70d6 | 1079 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 1080 | { |
316d70d6 | 1081 | struct machine *machine = arg; |
3f067dca | 1082 | struct map *map; |
316d70d6 | 1083 | |
9f2de315 | 1084 | map = machine__findnew_module_map(machine, start, name); |
316d70d6 AH |
1085 | if (map == NULL) |
1086 | return -1; | |
1087 | ||
1088 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1089 | ||
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | static int machine__create_modules(struct machine *machine) | |
1094 | { | |
3f067dca ACM |
1095 | const char *modules; |
1096 | char path[PATH_MAX]; | |
1097 | ||
f4be904d | 1098 | if (machine__is_default_guest(machine)) { |
3f067dca | 1099 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1100 | } else { |
1101 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1102 | modules = path; |
1103 | } | |
1104 | ||
aa7fe3b0 | 1105 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1106 | return -1; |
1107 | ||
316d70d6 | 1108 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1109 | return -1; |
1110 | ||
316d70d6 AH |
1111 | if (!machine__set_modules_path(machine)) |
1112 | return 0; | |
3f067dca | 1113 | |
316d70d6 | 1114 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1115 | |
8f76fcd9 | 1116 | return 0; |
3f067dca ACM |
1117 | } |
1118 | ||
1119 | int machine__create_kernel_maps(struct machine *machine) | |
1120 | { | |
1121 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 1122 | const char *name; |
4b99375b | 1123 | u64 addr = machine__get_running_kernel_start(machine, &name); |
1154c957 MH |
1124 | int ret; |
1125 | ||
1126 | if (!addr || kernel == NULL) | |
5512cf24 | 1127 | return -1; |
3f067dca | 1128 | |
1154c957 MH |
1129 | ret = __machine__create_kernel_maps(machine, kernel); |
1130 | dso__put(kernel); | |
1131 | if (ret < 0) | |
3f067dca ACM |
1132 | return -1; |
1133 | ||
1134 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1135 | if (machine__is_host(machine)) | |
1136 | pr_debug("Problems creating module maps, " | |
1137 | "continuing anyway...\n"); | |
1138 | else | |
1139 | pr_debug("Problems creating module maps for guest %d, " | |
1140 | "continuing anyway...\n", machine->pid); | |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * Now that we have all the maps created, just set the ->end of them: | |
1145 | */ | |
1146 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
1147 | |
1148 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
1149 | addr)) { | |
1150 | machine__destroy_kernel_maps(machine); | |
1151 | return -1; | |
1152 | } | |
1153 | ||
3f067dca ACM |
1154 | return 0; |
1155 | } | |
1156 | ||
b0a7d1a0 ACM |
1157 | static void machine__set_kernel_mmap_len(struct machine *machine, |
1158 | union perf_event *event) | |
1159 | { | |
4552cf0f NK |
1160 | int i; |
1161 | ||
1162 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1163 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1164 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1165 | event->mmap.len); | |
1166 | /* | |
1167 | * Be a bit paranoid here, some perf.data file came with | |
1168 | * a zero sized synthesized MMAP event for the kernel. | |
1169 | */ | |
1170 | if (machine->vmlinux_maps[i]->end == 0) | |
1171 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1172 | } | |
b0a7d1a0 ACM |
1173 | } |
1174 | ||
8e0cf965 AH |
1175 | static bool machine__uses_kcore(struct machine *machine) |
1176 | { | |
1177 | struct dso *dso; | |
1178 | ||
3d39ac53 | 1179 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1180 | if (dso__is_kcore(dso)) |
1181 | return true; | |
1182 | } | |
1183 | ||
1184 | return false; | |
1185 | } | |
1186 | ||
b0a7d1a0 ACM |
1187 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1188 | union perf_event *event) | |
1189 | { | |
1190 | struct map *map; | |
1191 | char kmmap_prefix[PATH_MAX]; | |
1192 | enum dso_kernel_type kernel_type; | |
1193 | bool is_kernel_mmap; | |
1194 | ||
8e0cf965 AH |
1195 | /* If we have maps from kcore then we do not need or want any others */ |
1196 | if (machine__uses_kcore(machine)) | |
1197 | return 0; | |
1198 | ||
b0a7d1a0 ACM |
1199 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1200 | if (machine__is_host(machine)) | |
1201 | kernel_type = DSO_TYPE_KERNEL; | |
1202 | else | |
1203 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1204 | ||
1205 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1206 | kmmap_prefix, | |
1207 | strlen(kmmap_prefix) - 1) == 0; | |
1208 | if (event->mmap.filename[0] == '/' || | |
1209 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
9f2de315 ACM |
1210 | map = machine__findnew_module_map(machine, event->mmap.start, |
1211 | event->mmap.filename); | |
b0a7d1a0 ACM |
1212 | if (map == NULL) |
1213 | goto out_problem; | |
1214 | ||
b0a7d1a0 ACM |
1215 | map->end = map->start + event->mmap.len; |
1216 | } else if (is_kernel_mmap) { | |
1217 | const char *symbol_name = (event->mmap.filename + | |
1218 | strlen(kmmap_prefix)); | |
1219 | /* | |
1220 | * Should be there already, from the build-id table in | |
1221 | * the header. | |
1222 | */ | |
b837a8bd NK |
1223 | struct dso *kernel = NULL; |
1224 | struct dso *dso; | |
1225 | ||
e8807844 ACM |
1226 | pthread_rwlock_rdlock(&machine->dsos.lock); |
1227 | ||
3d39ac53 | 1228 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1229 | |
1230 | /* | |
1231 | * The cpumode passed to is_kernel_module is not the | |
1232 | * cpumode of *this* event. If we insist on passing | |
1233 | * correct cpumode to is_kernel_module, we should | |
1234 | * record the cpumode when we adding this dso to the | |
1235 | * linked list. | |
1236 | * | |
1237 | * However we don't really need passing correct | |
1238 | * cpumode. We know the correct cpumode must be kernel | |
1239 | * mode (if not, we should not link it onto kernel_dsos | |
1240 | * list). | |
1241 | * | |
1242 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1243 | * is_kernel_module() treats it as a kernel cpumode. | |
1244 | */ | |
1245 | ||
1246 | if (!dso->kernel || | |
1247 | is_kernel_module(dso->long_name, | |
1248 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1249 | continue; |
1250 | ||
1f121b03 | 1251 | |
b837a8bd NK |
1252 | kernel = dso; |
1253 | break; | |
1254 | } | |
1255 | ||
e8807844 ACM |
1256 | pthread_rwlock_unlock(&machine->dsos.lock); |
1257 | ||
b837a8bd | 1258 | if (kernel == NULL) |
aa7cc2ae | 1259 | kernel = machine__findnew_dso(machine, kmmap_prefix); |
b0a7d1a0 ACM |
1260 | if (kernel == NULL) |
1261 | goto out_problem; | |
1262 | ||
1263 | kernel->kernel = kernel_type; | |
d3a7c489 ACM |
1264 | if (__machine__create_kernel_maps(machine, kernel) < 0) { |
1265 | dso__put(kernel); | |
b0a7d1a0 | 1266 | goto out_problem; |
d3a7c489 | 1267 | } |
b0a7d1a0 | 1268 | |
330dfa22 NK |
1269 | if (strstr(kernel->long_name, "vmlinux")) |
1270 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1271 | |
b0a7d1a0 ACM |
1272 | machine__set_kernel_mmap_len(machine, event); |
1273 | ||
1274 | /* | |
1275 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1276 | * symbol. Effectively having zero here means that at record | |
1277 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1278 | */ | |
1279 | if (event->mmap.pgoff != 0) { | |
1280 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1281 | symbol_name, | |
1282 | event->mmap.pgoff); | |
1283 | } | |
1284 | ||
1285 | if (machine__is_default_guest(machine)) { | |
1286 | /* | |
1287 | * preload dso of guest kernel and modules | |
1288 | */ | |
a5e813c6 | 1289 | dso__load(kernel, machine__kernel_map(machine), NULL); |
b0a7d1a0 ACM |
1290 | } |
1291 | } | |
1292 | return 0; | |
1293 | out_problem: | |
1294 | return -1; | |
1295 | } | |
1296 | ||
5c5e854b | 1297 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1298 | union perf_event *event, |
1299 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1300 | { |
1301 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1302 | struct thread *thread; | |
1303 | struct map *map; | |
1304 | enum map_type type; | |
1305 | int ret = 0; | |
1306 | ||
1307 | if (dump_trace) | |
1308 | perf_event__fprintf_mmap2(event, stdout); | |
1309 | ||
1310 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1311 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1312 | ret = machine__process_kernel_mmap_event(machine, event); | |
1313 | if (ret < 0) | |
1314 | goto out_problem; | |
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1319 | event->mmap2.tid); |
5c5e854b SE |
1320 | if (thread == NULL) |
1321 | goto out_problem; | |
1322 | ||
1323 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1324 | type = MAP__VARIABLE; | |
1325 | else | |
1326 | type = MAP__FUNCTION; | |
1327 | ||
2a03068c | 1328 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1329 | event->mmap2.len, event->mmap2.pgoff, |
1330 | event->mmap2.pid, event->mmap2.maj, | |
1331 | event->mmap2.min, event->mmap2.ino, | |
1332 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1333 | event->mmap2.prot, |
1334 | event->mmap2.flags, | |
5835edda | 1335 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1336 | |
1337 | if (map == NULL) | |
b91fc39f | 1338 | goto out_problem_map; |
5c5e854b SE |
1339 | |
1340 | thread__insert_map(thread, map); | |
b91fc39f | 1341 | thread__put(thread); |
84c2cafa | 1342 | map__put(map); |
5c5e854b SE |
1343 | return 0; |
1344 | ||
b91fc39f ACM |
1345 | out_problem_map: |
1346 | thread__put(thread); | |
5c5e854b SE |
1347 | out_problem: |
1348 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1349 | return 0; | |
1350 | } | |
1351 | ||
162f0bef FW |
1352 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1353 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1354 | { |
1355 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1356 | struct thread *thread; | |
1357 | struct map *map; | |
bad40917 | 1358 | enum map_type type; |
b0a7d1a0 ACM |
1359 | int ret = 0; |
1360 | ||
1361 | if (dump_trace) | |
1362 | perf_event__fprintf_mmap(event, stdout); | |
1363 | ||
1364 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1365 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1366 | ret = machine__process_kernel_mmap_event(machine, event); | |
1367 | if (ret < 0) | |
1368 | goto out_problem; | |
1369 | return 0; | |
1370 | } | |
1371 | ||
314add6b | 1372 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1373 | event->mmap.tid); |
b0a7d1a0 ACM |
1374 | if (thread == NULL) |
1375 | goto out_problem; | |
bad40917 SE |
1376 | |
1377 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1378 | type = MAP__VARIABLE; | |
1379 | else | |
1380 | type = MAP__FUNCTION; | |
1381 | ||
2a03068c | 1382 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1383 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1384 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1385 | event->mmap.filename, |
5835edda | 1386 | type, thread); |
bad40917 | 1387 | |
b0a7d1a0 | 1388 | if (map == NULL) |
b91fc39f | 1389 | goto out_problem_map; |
b0a7d1a0 ACM |
1390 | |
1391 | thread__insert_map(thread, map); | |
b91fc39f | 1392 | thread__put(thread); |
84c2cafa | 1393 | map__put(map); |
b0a7d1a0 ACM |
1394 | return 0; |
1395 | ||
b91fc39f ACM |
1396 | out_problem_map: |
1397 | thread__put(thread); | |
b0a7d1a0 ACM |
1398 | out_problem: |
1399 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1400 | return 0; | |
1401 | } | |
1402 | ||
b91fc39f | 1403 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1404 | { |
f3b623b8 | 1405 | if (machine->last_match == th) |
0ceb8f6e | 1406 | machine->last_match = NULL; |
f3b623b8 | 1407 | |
59a51c1d | 1408 | BUG_ON(atomic_read(&th->refcnt) == 0); |
b91fc39f ACM |
1409 | if (lock) |
1410 | pthread_rwlock_wrlock(&machine->threads_lock); | |
0170b14f | 1411 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 1412 | RB_CLEAR_NODE(&th->rb_node); |
236a3bbd | 1413 | /* |
f3b623b8 ACM |
1414 | * Move it first to the dead_threads list, then drop the reference, |
1415 | * if this is the last reference, then the thread__delete destructor | |
1416 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd DA |
1417 | */ |
1418 | list_add_tail(&th->node, &machine->dead_threads); | |
b91fc39f ACM |
1419 | if (lock) |
1420 | pthread_rwlock_unlock(&machine->threads_lock); | |
f3b623b8 | 1421 | thread__put(th); |
236a3bbd DA |
1422 | } |
1423 | ||
b91fc39f ACM |
1424 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1425 | { | |
1426 | return __machine__remove_thread(machine, th, true); | |
1427 | } | |
1428 | ||
162f0bef FW |
1429 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1430 | struct perf_sample *sample) | |
b0a7d1a0 | 1431 | { |
d75e6097 JO |
1432 | struct thread *thread = machine__find_thread(machine, |
1433 | event->fork.pid, | |
1434 | event->fork.tid); | |
314add6b AH |
1435 | struct thread *parent = machine__findnew_thread(machine, |
1436 | event->fork.ppid, | |
1437 | event->fork.ptid); | |
b91fc39f | 1438 | int err = 0; |
b0a7d1a0 | 1439 | |
5cb73340 AH |
1440 | if (dump_trace) |
1441 | perf_event__fprintf_task(event, stdout); | |
1442 | ||
1443 | /* | |
1444 | * There may be an existing thread that is not actually the parent, | |
1445 | * either because we are processing events out of order, or because the | |
1446 | * (fork) event that would have removed the thread was lost. Assume the | |
1447 | * latter case and continue on as best we can. | |
1448 | */ | |
1449 | if (parent->pid_ != (pid_t)event->fork.ppid) { | |
1450 | dump_printf("removing erroneous parent thread %d/%d\n", | |
1451 | parent->pid_, parent->tid); | |
1452 | machine__remove_thread(machine, parent); | |
1453 | thread__put(parent); | |
1454 | parent = machine__findnew_thread(machine, event->fork.ppid, | |
1455 | event->fork.ptid); | |
1456 | } | |
1457 | ||
236a3bbd | 1458 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1459 | if (thread != NULL) { |
236a3bbd | 1460 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1461 | thread__put(thread); |
1462 | } | |
236a3bbd | 1463 | |
314add6b AH |
1464 | thread = machine__findnew_thread(machine, event->fork.pid, |
1465 | event->fork.tid); | |
b0a7d1a0 ACM |
1466 | |
1467 | if (thread == NULL || parent == NULL || | |
162f0bef | 1468 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 | 1469 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1470 | err = -1; |
b0a7d1a0 | 1471 | } |
b91fc39f ACM |
1472 | thread__put(thread); |
1473 | thread__put(parent); | |
b0a7d1a0 | 1474 | |
b91fc39f | 1475 | return err; |
b0a7d1a0 ACM |
1476 | } |
1477 | ||
162f0bef FW |
1478 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1479 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1480 | { |
d75e6097 JO |
1481 | struct thread *thread = machine__find_thread(machine, |
1482 | event->fork.pid, | |
1483 | event->fork.tid); | |
b0a7d1a0 ACM |
1484 | |
1485 | if (dump_trace) | |
1486 | perf_event__fprintf_task(event, stdout); | |
1487 | ||
b91fc39f | 1488 | if (thread != NULL) { |
236a3bbd | 1489 | thread__exited(thread); |
b91fc39f ACM |
1490 | thread__put(thread); |
1491 | } | |
b0a7d1a0 ACM |
1492 | |
1493 | return 0; | |
1494 | } | |
1495 | ||
162f0bef FW |
1496 | int machine__process_event(struct machine *machine, union perf_event *event, |
1497 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1498 | { |
1499 | int ret; | |
1500 | ||
1501 | switch (event->header.type) { | |
1502 | case PERF_RECORD_COMM: | |
162f0bef | 1503 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1504 | case PERF_RECORD_MMAP: |
162f0bef | 1505 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1506 | case PERF_RECORD_MMAP2: |
162f0bef | 1507 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1508 | case PERF_RECORD_FORK: |
162f0bef | 1509 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1510 | case PERF_RECORD_EXIT: |
162f0bef | 1511 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1512 | case PERF_RECORD_LOST: |
162f0bef | 1513 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
1514 | case PERF_RECORD_AUX: |
1515 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 | 1516 | case PERF_RECORD_ITRACE_START: |
ceb92913 | 1517 | ret = machine__process_itrace_start_event(machine, event); break; |
c4937a91 KL |
1518 | case PERF_RECORD_LOST_SAMPLES: |
1519 | ret = machine__process_lost_samples_event(machine, event, sample); break; | |
0286039f AH |
1520 | case PERF_RECORD_SWITCH: |
1521 | case PERF_RECORD_SWITCH_CPU_WIDE: | |
1522 | ret = machine__process_switch_event(machine, event); break; | |
b0a7d1a0 ACM |
1523 | default: |
1524 | ret = -1; | |
1525 | break; | |
1526 | } | |
1527 | ||
1528 | return ret; | |
1529 | } | |
3f067dca | 1530 | |
b21484f1 | 1531 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1532 | { |
b21484f1 | 1533 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1534 | return 1; |
3f067dca ACM |
1535 | return 0; |
1536 | } | |
1537 | ||
bb871a9c | 1538 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1539 | struct addr_map_symbol *ams, |
1540 | u64 ip) | |
1541 | { | |
1542 | struct addr_location al; | |
3f067dca ACM |
1543 | |
1544 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1545 | /* |
1546 | * We cannot use the header.misc hint to determine whether a | |
1547 | * branch stack address is user, kernel, guest, hypervisor. | |
1548 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1549 | * Thus, we have to try consecutively until we find a match | |
1550 | * or else, the symbol is unknown | |
1551 | */ | |
bb871a9c | 1552 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1553 | |
3f067dca ACM |
1554 | ams->addr = ip; |
1555 | ams->al_addr = al.addr; | |
1556 | ams->sym = al.sym; | |
1557 | ams->map = al.map; | |
1558 | } | |
1559 | ||
bb871a9c | 1560 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1561 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1562 | { | |
1563 | struct addr_location al; | |
1564 | ||
1565 | memset(&al, 0, sizeof(al)); | |
1566 | ||
bb871a9c | 1567 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1568 | if (al.map == NULL) { |
1569 | /* | |
1570 | * some shared data regions have execute bit set which puts | |
1571 | * their mapping in the MAP__FUNCTION type array. | |
1572 | * Check there as a fallback option before dropping the sample. | |
1573 | */ | |
bb871a9c | 1574 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1575 | } |
1576 | ||
98a3b32c SE |
1577 | ams->addr = addr; |
1578 | ams->al_addr = al.addr; | |
1579 | ams->sym = al.sym; | |
1580 | ams->map = al.map; | |
1581 | } | |
1582 | ||
e80faac0 ACM |
1583 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1584 | struct addr_location *al) | |
98a3b32c SE |
1585 | { |
1586 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1587 | ||
1588 | if (!mi) | |
1589 | return NULL; | |
1590 | ||
bb871a9c ACM |
1591 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1592 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1593 | mi->data_src.val = sample->data_src; |
1594 | ||
1595 | return mi; | |
1596 | } | |
1597 | ||
37592b8a AK |
1598 | static int add_callchain_ip(struct thread *thread, |
1599 | struct symbol **parent, | |
1600 | struct addr_location *root_al, | |
73dbcd65 | 1601 | u8 *cpumode, |
37592b8a AK |
1602 | u64 ip) |
1603 | { | |
1604 | struct addr_location al; | |
1605 | ||
1606 | al.filtered = 0; | |
1607 | al.sym = NULL; | |
73dbcd65 | 1608 | if (!cpumode) { |
8b7bad58 AK |
1609 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, |
1610 | ip, &al); | |
73dbcd65 | 1611 | } else { |
2e77784b KL |
1612 | if (ip >= PERF_CONTEXT_MAX) { |
1613 | switch (ip) { | |
1614 | case PERF_CONTEXT_HV: | |
73dbcd65 | 1615 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
1616 | break; |
1617 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 1618 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
1619 | break; |
1620 | case PERF_CONTEXT_USER: | |
73dbcd65 | 1621 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
1622 | break; |
1623 | default: | |
1624 | pr_debug("invalid callchain context: " | |
1625 | "%"PRId64"\n", (s64) ip); | |
1626 | /* | |
1627 | * It seems the callchain is corrupted. | |
1628 | * Discard all. | |
1629 | */ | |
1630 | callchain_cursor_reset(&callchain_cursor); | |
1631 | return 1; | |
1632 | } | |
1633 | return 0; | |
1634 | } | |
73dbcd65 DH |
1635 | thread__find_addr_location(thread, *cpumode, MAP__FUNCTION, |
1636 | ip, &al); | |
2e77784b KL |
1637 | } |
1638 | ||
37592b8a AK |
1639 | if (al.sym != NULL) { |
1640 | if (sort__has_parent && !*parent && | |
1641 | symbol__match_regex(al.sym, &parent_regex)) | |
1642 | *parent = al.sym; | |
1643 | else if (have_ignore_callees && root_al && | |
1644 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1645 | /* Treat this symbol as the root, | |
1646 | forgetting its callees. */ | |
1647 | *root_al = al; | |
1648 | callchain_cursor_reset(&callchain_cursor); | |
1649 | } | |
1650 | } | |
1651 | ||
b49a8fe5 NK |
1652 | if (symbol_conf.hide_unresolved && al.sym == NULL) |
1653 | return 0; | |
5550171b | 1654 | return callchain_cursor_append(&callchain_cursor, al.addr, al.map, al.sym); |
37592b8a AK |
1655 | } |
1656 | ||
644f2df2 ACM |
1657 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1658 | struct addr_location *al) | |
3f067dca | 1659 | { |
3f067dca | 1660 | unsigned int i; |
644f2df2 ACM |
1661 | const struct branch_stack *bs = sample->branch_stack; |
1662 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1663 | |
3f067dca ACM |
1664 | if (!bi) |
1665 | return NULL; | |
1666 | ||
1667 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1668 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1669 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1670 | bi[i].flags = bs->entries[i].flags; |
1671 | } | |
1672 | return bi; | |
1673 | } | |
1674 | ||
8b7bad58 AK |
1675 | #define CHASHSZ 127 |
1676 | #define CHASHBITS 7 | |
1677 | #define NO_ENTRY 0xff | |
1678 | ||
1679 | #define PERF_MAX_BRANCH_DEPTH 127 | |
1680 | ||
1681 | /* Remove loops. */ | |
1682 | static int remove_loops(struct branch_entry *l, int nr) | |
1683 | { | |
1684 | int i, j, off; | |
1685 | unsigned char chash[CHASHSZ]; | |
1686 | ||
1687 | memset(chash, NO_ENTRY, sizeof(chash)); | |
1688 | ||
1689 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
1690 | ||
1691 | for (i = 0; i < nr; i++) { | |
1692 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
1693 | ||
1694 | /* no collision handling for now */ | |
1695 | if (chash[h] == NO_ENTRY) { | |
1696 | chash[h] = i; | |
1697 | } else if (l[chash[h]].from == l[i].from) { | |
1698 | bool is_loop = true; | |
1699 | /* check if it is a real loop */ | |
1700 | off = 0; | |
1701 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
1702 | if (l[j].from != l[i + off].from) { | |
1703 | is_loop = false; | |
1704 | break; | |
1705 | } | |
1706 | if (is_loop) { | |
1707 | memmove(l + i, l + i + off, | |
1708 | (nr - (i + off)) * sizeof(*l)); | |
1709 | nr -= off; | |
1710 | } | |
1711 | } | |
1712 | } | |
1713 | return nr; | |
1714 | } | |
1715 | ||
384b6055 KL |
1716 | /* |
1717 | * Recolve LBR callstack chain sample | |
1718 | * Return: | |
1719 | * 1 on success get LBR callchain information | |
1720 | * 0 no available LBR callchain information, should try fp | |
1721 | * negative error code on other errors. | |
1722 | */ | |
1723 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
1724 | struct perf_sample *sample, | |
1725 | struct symbol **parent, | |
1726 | struct addr_location *root_al, | |
1727 | int max_stack) | |
3f067dca | 1728 | { |
384b6055 KL |
1729 | struct ip_callchain *chain = sample->callchain; |
1730 | int chain_nr = min(max_stack, (int)chain->nr); | |
73dbcd65 | 1731 | u8 cpumode = PERF_RECORD_MISC_USER; |
384b6055 KL |
1732 | int i, j, err; |
1733 | u64 ip; | |
1734 | ||
1735 | for (i = 0; i < chain_nr; i++) { | |
1736 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
1737 | break; | |
1738 | } | |
1739 | ||
1740 | /* LBR only affects the user callchain */ | |
1741 | if (i != chain_nr) { | |
1742 | struct branch_stack *lbr_stack = sample->branch_stack; | |
1743 | int lbr_nr = lbr_stack->nr; | |
1744 | /* | |
1745 | * LBR callstack can only get user call chain. | |
1746 | * The mix_chain_nr is kernel call chain | |
1747 | * number plus LBR user call chain number. | |
1748 | * i is kernel call chain number, | |
1749 | * 1 is PERF_CONTEXT_USER, | |
1750 | * lbr_nr + 1 is the user call chain number. | |
1751 | * For details, please refer to the comments | |
1752 | * in callchain__printf | |
1753 | */ | |
1754 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
1755 | ||
1756 | if (mix_chain_nr > PERF_MAX_STACK_DEPTH + PERF_MAX_BRANCH_DEPTH) { | |
1757 | pr_warning("corrupted callchain. skipping...\n"); | |
1758 | return 0; | |
1759 | } | |
1760 | ||
1761 | for (j = 0; j < mix_chain_nr; j++) { | |
1762 | if (callchain_param.order == ORDER_CALLEE) { | |
1763 | if (j < i + 1) | |
1764 | ip = chain->ips[j]; | |
1765 | else if (j > i + 1) | |
1766 | ip = lbr_stack->entries[j - i - 2].from; | |
1767 | else | |
1768 | ip = lbr_stack->entries[0].to; | |
1769 | } else { | |
1770 | if (j < lbr_nr) | |
1771 | ip = lbr_stack->entries[lbr_nr - j - 1].from; | |
1772 | else if (j > lbr_nr) | |
1773 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
1774 | else | |
1775 | ip = lbr_stack->entries[0].to; | |
1776 | } | |
1777 | ||
73dbcd65 | 1778 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
384b6055 KL |
1779 | if (err) |
1780 | return (err < 0) ? err : 0; | |
1781 | } | |
1782 | return 1; | |
1783 | } | |
1784 | ||
1785 | return 0; | |
1786 | } | |
1787 | ||
1788 | static int thread__resolve_callchain_sample(struct thread *thread, | |
1789 | struct perf_evsel *evsel, | |
1790 | struct perf_sample *sample, | |
1791 | struct symbol **parent, | |
1792 | struct addr_location *root_al, | |
1793 | int max_stack) | |
1794 | { | |
1795 | struct branch_stack *branch = sample->branch_stack; | |
1796 | struct ip_callchain *chain = sample->callchain; | |
91e95617 | 1797 | int chain_nr = min(max_stack, (int)chain->nr); |
73dbcd65 | 1798 | u8 cpumode = PERF_RECORD_MISC_USER; |
2e77784b | 1799 | int i, j, err; |
8b7bad58 AK |
1800 | int skip_idx = -1; |
1801 | int first_call = 0; | |
1802 | ||
384b6055 KL |
1803 | callchain_cursor_reset(&callchain_cursor); |
1804 | ||
1805 | if (has_branch_callstack(evsel)) { | |
1806 | err = resolve_lbr_callchain_sample(thread, sample, parent, | |
1807 | root_al, max_stack); | |
1808 | if (err) | |
1809 | return (err < 0) ? err : 0; | |
1810 | } | |
1811 | ||
8b7bad58 AK |
1812 | /* |
1813 | * Based on DWARF debug information, some architectures skip | |
1814 | * a callchain entry saved by the kernel. | |
1815 | */ | |
1816 | if (chain->nr < PERF_MAX_STACK_DEPTH) | |
1817 | skip_idx = arch_skip_callchain_idx(thread, chain); | |
3f067dca | 1818 | |
8b7bad58 AK |
1819 | /* |
1820 | * Add branches to call stack for easier browsing. This gives | |
1821 | * more context for a sample than just the callers. | |
1822 | * | |
1823 | * This uses individual histograms of paths compared to the | |
1824 | * aggregated histograms the normal LBR mode uses. | |
1825 | * | |
1826 | * Limitations for now: | |
1827 | * - No extra filters | |
1828 | * - No annotations (should annotate somehow) | |
1829 | */ | |
1830 | ||
1831 | if (branch && callchain_param.branch_callstack) { | |
1832 | int nr = min(max_stack, (int)branch->nr); | |
1833 | struct branch_entry be[nr]; | |
1834 | ||
1835 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
1836 | pr_warning("corrupted branch chain. skipping...\n"); | |
1837 | goto check_calls; | |
1838 | } | |
1839 | ||
1840 | for (i = 0; i < nr; i++) { | |
1841 | if (callchain_param.order == ORDER_CALLEE) { | |
1842 | be[i] = branch->entries[i]; | |
1843 | /* | |
1844 | * Check for overlap into the callchain. | |
1845 | * The return address is one off compared to | |
1846 | * the branch entry. To adjust for this | |
1847 | * assume the calling instruction is not longer | |
1848 | * than 8 bytes. | |
1849 | */ | |
1850 | if (i == skip_idx || | |
1851 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
1852 | first_call++; | |
1853 | else if (be[i].from < chain->ips[first_call] && | |
1854 | be[i].from >= chain->ips[first_call] - 8) | |
1855 | first_call++; | |
1856 | } else | |
1857 | be[i] = branch->entries[branch->nr - i - 1]; | |
1858 | } | |
1859 | ||
1860 | nr = remove_loops(be, nr); | |
1861 | ||
1862 | for (i = 0; i < nr; i++) { | |
1863 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1864 | NULL, be[i].to); |
8b7bad58 AK |
1865 | if (!err) |
1866 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1867 | NULL, be[i].from); |
8b7bad58 AK |
1868 | if (err == -EINVAL) |
1869 | break; | |
1870 | if (err) | |
1871 | return err; | |
1872 | } | |
1873 | chain_nr -= nr; | |
1874 | } | |
1875 | ||
1876 | check_calls: | |
0edd4533 | 1877 | if (chain->nr > PERF_MAX_STACK_DEPTH && (int)chain->nr > max_stack) { |
3f067dca ACM |
1878 | pr_warning("corrupted callchain. skipping...\n"); |
1879 | return 0; | |
1880 | } | |
1881 | ||
8b7bad58 | 1882 | for (i = first_call; i < chain_nr; i++) { |
3f067dca | 1883 | u64 ip; |
3f067dca ACM |
1884 | |
1885 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1886 | j = i; |
3f067dca | 1887 | else |
a60335ba SB |
1888 | j = chain->nr - i - 1; |
1889 | ||
1890 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1891 | if (j == skip_idx) | |
1892 | continue; | |
1893 | #endif | |
1894 | ip = chain->ips[j]; | |
3f067dca | 1895 | |
73dbcd65 | 1896 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
3f067dca | 1897 | |
3f067dca | 1898 | if (err) |
2e77784b | 1899 | return (err < 0) ? err : 0; |
3f067dca ACM |
1900 | } |
1901 | ||
1902 | return 0; | |
1903 | } | |
1904 | ||
1905 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1906 | { | |
1907 | struct callchain_cursor *cursor = arg; | |
b49a8fe5 NK |
1908 | |
1909 | if (symbol_conf.hide_unresolved && entry->sym == NULL) | |
1910 | return 0; | |
3f067dca ACM |
1911 | return callchain_cursor_append(cursor, entry->ip, |
1912 | entry->map, entry->sym); | |
1913 | } | |
1914 | ||
cc8b7c2b ACM |
1915 | int thread__resolve_callchain(struct thread *thread, |
1916 | struct perf_evsel *evsel, | |
1917 | struct perf_sample *sample, | |
1918 | struct symbol **parent, | |
1919 | struct addr_location *root_al, | |
1920 | int max_stack) | |
3f067dca | 1921 | { |
384b6055 KL |
1922 | int ret = thread__resolve_callchain_sample(thread, evsel, |
1923 | sample, parent, | |
1924 | root_al, max_stack); | |
3f067dca ACM |
1925 | if (ret) |
1926 | return ret; | |
1927 | ||
1928 | /* Can we do dwarf post unwind? */ | |
1929 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1930 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1931 | return 0; | |
1932 | ||
1933 | /* Bail out if nothing was captured. */ | |
1934 | if ((!sample->user_regs.regs) || | |
1935 | (!sample->user_stack.size)) | |
1936 | return 0; | |
1937 | ||
dd8c17a5 | 1938 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1939 | thread, sample, max_stack); |
3f067dca ACM |
1940 | |
1941 | } | |
35feee19 DA |
1942 | |
1943 | int machine__for_each_thread(struct machine *machine, | |
1944 | int (*fn)(struct thread *thread, void *p), | |
1945 | void *priv) | |
1946 | { | |
1947 | struct rb_node *nd; | |
1948 | struct thread *thread; | |
1949 | int rc = 0; | |
1950 | ||
1951 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1952 | thread = rb_entry(nd, struct thread, rb_node); | |
1953 | rc = fn(thread, priv); | |
1954 | if (rc != 0) | |
1955 | return rc; | |
1956 | } | |
1957 | ||
1958 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1959 | rc = fn(thread, priv); | |
1960 | if (rc != 0) | |
1961 | return rc; | |
1962 | } | |
1963 | return rc; | |
1964 | } | |
58d925dc | 1965 | |
a5499b37 AH |
1966 | int machines__for_each_thread(struct machines *machines, |
1967 | int (*fn)(struct thread *thread, void *p), | |
1968 | void *priv) | |
1969 | { | |
1970 | struct rb_node *nd; | |
1971 | int rc = 0; | |
1972 | ||
1973 | rc = machine__for_each_thread(&machines->host, fn, priv); | |
1974 | if (rc != 0) | |
1975 | return rc; | |
1976 | ||
1977 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
1978 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
1979 | ||
1980 | rc = machine__for_each_thread(machine, fn, priv); | |
1981 | if (rc != 0) | |
1982 | return rc; | |
1983 | } | |
1984 | return rc; | |
1985 | } | |
1986 | ||
a33fbd56 | 1987 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1988 | struct target *target, struct thread_map *threads, |
9d9cad76 KL |
1989 | perf_event__handler_t process, bool data_mmap, |
1990 | unsigned int proc_map_timeout) | |
58d925dc | 1991 | { |
602ad878 | 1992 | if (target__has_task(target)) |
9d9cad76 | 1993 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, proc_map_timeout); |
602ad878 | 1994 | else if (target__has_cpu(target)) |
9d9cad76 | 1995 | return perf_event__synthesize_threads(tool, process, machine, data_mmap, proc_map_timeout); |
58d925dc ACM |
1996 | /* command specified */ |
1997 | return 0; | |
1998 | } | |
b9d266ba AH |
1999 | |
2000 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
2001 | { | |
2002 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
2003 | return -1; | |
2004 | ||
2005 | return machine->current_tid[cpu]; | |
2006 | } | |
2007 | ||
2008 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
2009 | pid_t tid) | |
2010 | { | |
2011 | struct thread *thread; | |
2012 | ||
2013 | if (cpu < 0) | |
2014 | return -EINVAL; | |
2015 | ||
2016 | if (!machine->current_tid) { | |
2017 | int i; | |
2018 | ||
2019 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
2020 | if (!machine->current_tid) | |
2021 | return -ENOMEM; | |
2022 | for (i = 0; i < MAX_NR_CPUS; i++) | |
2023 | machine->current_tid[i] = -1; | |
2024 | } | |
2025 | ||
2026 | if (cpu >= MAX_NR_CPUS) { | |
2027 | pr_err("Requested CPU %d too large. ", cpu); | |
2028 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
2029 | return -EINVAL; | |
2030 | } | |
2031 | ||
2032 | machine->current_tid[cpu] = tid; | |
2033 | ||
2034 | thread = machine__findnew_thread(machine, pid, tid); | |
2035 | if (!thread) | |
2036 | return -ENOMEM; | |
2037 | ||
2038 | thread->cpu = cpu; | |
b91fc39f | 2039 | thread__put(thread); |
b9d266ba AH |
2040 | |
2041 | return 0; | |
2042 | } | |
fbe2af45 AH |
2043 | |
2044 | int machine__get_kernel_start(struct machine *machine) | |
2045 | { | |
a5e813c6 | 2046 | struct map *map = machine__kernel_map(machine); |
fbe2af45 AH |
2047 | int err = 0; |
2048 | ||
2049 | /* | |
2050 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
2051 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
2052 | * all addresses including kernel addresses are less than 2^32. In | |
2053 | * that case (32-bit system), if the kernel mapping is unknown, all | |
2054 | * addresses will be assumed to be in user space - see | |
2055 | * machine__kernel_ip(). | |
2056 | */ | |
2057 | machine->kernel_start = 1ULL << 63; | |
2058 | if (map) { | |
2059 | err = map__load(map, machine->symbol_filter); | |
2060 | if (map->start) | |
2061 | machine->kernel_start = map->start; | |
2062 | } | |
2063 | return err; | |
2064 | } | |
aa7cc2ae ACM |
2065 | |
2066 | struct dso *machine__findnew_dso(struct machine *machine, const char *filename) | |
2067 | { | |
e8807844 | 2068 | return dsos__findnew(&machine->dsos, filename); |
aa7cc2ae | 2069 | } |
c3168b0d ACM |
2070 | |
2071 | char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) | |
2072 | { | |
2073 | struct machine *machine = vmachine; | |
2074 | struct map *map; | |
2075 | struct symbol *sym = map_groups__find_symbol(&machine->kmaps, MAP__FUNCTION, *addrp, &map, NULL); | |
2076 | ||
2077 | if (sym == NULL) | |
2078 | return NULL; | |
2079 | ||
2080 | *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL; | |
2081 | *addrp = map->unmap_ip(map, sym->start); | |
2082 | return sym->name; | |
2083 | } |