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