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