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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 | |
f3b623b8 ACM |
17 | static void machine__remove_thread(struct machine *machine, struct thread *th); |
18 | ||
e167f995 ACM |
19 | static void dsos__init(struct dsos *dsos) |
20 | { | |
21 | INIT_LIST_HEAD(&dsos->head); | |
22 | dsos->root = RB_ROOT; | |
23 | } | |
24 | ||
69d2591a ACM |
25 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
26 | { | |
11246c70 | 27 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 28 | RB_CLEAR_NODE(&machine->rb_node); |
e167f995 ACM |
29 | dsos__init(&machine->user_dsos); |
30 | dsos__init(&machine->kernel_dsos); | |
69d2591a ACM |
31 | |
32 | machine->threads = RB_ROOT; | |
33 | INIT_LIST_HEAD(&machine->dead_threads); | |
34 | machine->last_match = NULL; | |
35 | ||
d027b640 AH |
36 | machine->vdso_info = NULL; |
37 | ||
69d2591a ACM |
38 | machine->pid = pid; |
39 | ||
611a5ce8 | 40 | machine->symbol_filter = NULL; |
14bd6d20 | 41 | machine->id_hdr_size = 0; |
cfe1c414 | 42 | machine->comm_exec = false; |
fbe2af45 | 43 | machine->kernel_start = 0; |
611a5ce8 | 44 | |
69d2591a ACM |
45 | machine->root_dir = strdup(root_dir); |
46 | if (machine->root_dir == NULL) | |
47 | return -ENOMEM; | |
48 | ||
49 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 50 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 51 | pid); |
69d2591a ACM |
52 | char comm[64]; |
53 | ||
54 | if (thread == NULL) | |
55 | return -ENOMEM; | |
56 | ||
57 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 58 | thread__set_comm(thread, comm, 0); |
69d2591a ACM |
59 | } |
60 | ||
b9d266ba AH |
61 | machine->current_tid = NULL; |
62 | ||
69d2591a ACM |
63 | return 0; |
64 | } | |
65 | ||
8fb598e5 DA |
66 | struct machine *machine__new_host(void) |
67 | { | |
68 | struct machine *machine = malloc(sizeof(*machine)); | |
69 | ||
70 | if (machine != NULL) { | |
71 | machine__init(machine, "", HOST_KERNEL_ID); | |
72 | ||
73 | if (machine__create_kernel_maps(machine) < 0) | |
74 | goto out_delete; | |
75 | } | |
76 | ||
77 | return machine; | |
78 | out_delete: | |
79 | free(machine); | |
80 | return NULL; | |
81 | } | |
82 | ||
8fa7d87f | 83 | static void dsos__delete(struct dsos *dsos) |
69d2591a ACM |
84 | { |
85 | struct dso *pos, *n; | |
86 | ||
8fa7d87f | 87 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 88 | RB_CLEAR_NODE(&pos->rb_node); |
69d2591a ACM |
89 | list_del(&pos->node); |
90 | dso__delete(pos); | |
91 | } | |
92 | } | |
93 | ||
3f067dca ACM |
94 | void machine__delete_threads(struct machine *machine) |
95 | { | |
96 | struct rb_node *nd = rb_first(&machine->threads); | |
97 | ||
98 | while (nd) { | |
99 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
100 | ||
3f067dca | 101 | nd = rb_next(nd); |
f3b623b8 | 102 | machine__remove_thread(machine, t); |
3f067dca ACM |
103 | } |
104 | } | |
105 | ||
69d2591a ACM |
106 | void machine__exit(struct machine *machine) |
107 | { | |
108 | map_groups__exit(&machine->kmaps); | |
109 | dsos__delete(&machine->user_dsos); | |
110 | dsos__delete(&machine->kernel_dsos); | |
d027b640 | 111 | vdso__exit(machine); |
04662523 | 112 | zfree(&machine->root_dir); |
b9d266ba | 113 | zfree(&machine->current_tid); |
69d2591a ACM |
114 | } |
115 | ||
116 | void machine__delete(struct machine *machine) | |
117 | { | |
118 | machine__exit(machine); | |
119 | free(machine); | |
120 | } | |
121 | ||
876650e6 ACM |
122 | void machines__init(struct machines *machines) |
123 | { | |
124 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
125 | machines->guests = RB_ROOT; | |
611a5ce8 | 126 | machines->symbol_filter = NULL; |
876650e6 ACM |
127 | } |
128 | ||
129 | void machines__exit(struct machines *machines) | |
130 | { | |
131 | machine__exit(&machines->host); | |
132 | /* XXX exit guest */ | |
133 | } | |
134 | ||
135 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
136 | const char *root_dir) |
137 | { | |
876650e6 | 138 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
139 | struct rb_node *parent = NULL; |
140 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
141 | ||
142 | if (machine == NULL) | |
143 | return NULL; | |
144 | ||
145 | if (machine__init(machine, root_dir, pid) != 0) { | |
146 | free(machine); | |
147 | return NULL; | |
148 | } | |
149 | ||
611a5ce8 AH |
150 | machine->symbol_filter = machines->symbol_filter; |
151 | ||
69d2591a ACM |
152 | while (*p != NULL) { |
153 | parent = *p; | |
154 | pos = rb_entry(parent, struct machine, rb_node); | |
155 | if (pid < pos->pid) | |
156 | p = &(*p)->rb_left; | |
157 | else | |
158 | p = &(*p)->rb_right; | |
159 | } | |
160 | ||
161 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 162 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
163 | |
164 | return machine; | |
165 | } | |
166 | ||
611a5ce8 AH |
167 | void machines__set_symbol_filter(struct machines *machines, |
168 | symbol_filter_t symbol_filter) | |
169 | { | |
170 | struct rb_node *nd; | |
171 | ||
172 | machines->symbol_filter = symbol_filter; | |
173 | machines->host.symbol_filter = symbol_filter; | |
174 | ||
175 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
176 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
177 | ||
178 | machine->symbol_filter = symbol_filter; | |
179 | } | |
180 | } | |
181 | ||
cfe1c414 AH |
182 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
183 | { | |
184 | struct rb_node *nd; | |
185 | ||
186 | machines->host.comm_exec = comm_exec; | |
187 | ||
188 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
189 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
190 | ||
191 | machine->comm_exec = comm_exec; | |
192 | } | |
193 | } | |
194 | ||
876650e6 | 195 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 196 | { |
876650e6 | 197 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
198 | struct rb_node *parent = NULL; |
199 | struct machine *machine; | |
200 | struct machine *default_machine = NULL; | |
201 | ||
876650e6 ACM |
202 | if (pid == HOST_KERNEL_ID) |
203 | return &machines->host; | |
204 | ||
69d2591a ACM |
205 | while (*p != NULL) { |
206 | parent = *p; | |
207 | machine = rb_entry(parent, struct machine, rb_node); | |
208 | if (pid < machine->pid) | |
209 | p = &(*p)->rb_left; | |
210 | else if (pid > machine->pid) | |
211 | p = &(*p)->rb_right; | |
212 | else | |
213 | return machine; | |
214 | if (!machine->pid) | |
215 | default_machine = machine; | |
216 | } | |
217 | ||
218 | return default_machine; | |
219 | } | |
220 | ||
876650e6 | 221 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
222 | { |
223 | char path[PATH_MAX]; | |
224 | const char *root_dir = ""; | |
225 | struct machine *machine = machines__find(machines, pid); | |
226 | ||
227 | if (machine && (machine->pid == pid)) | |
228 | goto out; | |
229 | ||
230 | if ((pid != HOST_KERNEL_ID) && | |
231 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
232 | (symbol_conf.guestmount)) { | |
233 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
234 | if (access(path, R_OK)) { | |
235 | static struct strlist *seen; | |
236 | ||
237 | if (!seen) | |
238 | seen = strlist__new(true, NULL); | |
239 | ||
240 | if (!strlist__has_entry(seen, path)) { | |
241 | pr_err("Can't access file %s\n", path); | |
242 | strlist__add(seen, path); | |
243 | } | |
244 | machine = NULL; | |
245 | goto out; | |
246 | } | |
247 | root_dir = path; | |
248 | } | |
249 | ||
250 | machine = machines__add(machines, pid, root_dir); | |
251 | out: | |
252 | return machine; | |
253 | } | |
254 | ||
876650e6 ACM |
255 | void machines__process_guests(struct machines *machines, |
256 | machine__process_t process, void *data) | |
69d2591a ACM |
257 | { |
258 | struct rb_node *nd; | |
259 | ||
876650e6 | 260 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
261 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
262 | process(pos, data); | |
263 | } | |
264 | } | |
265 | ||
266 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
267 | { | |
268 | if (machine__is_host(machine)) | |
269 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
270 | else if (machine__is_default_guest(machine)) | |
271 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
272 | else { | |
273 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
274 | machine->pid); | |
275 | } | |
276 | ||
277 | return bf; | |
278 | } | |
279 | ||
876650e6 | 280 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
281 | { |
282 | struct rb_node *node; | |
283 | struct machine *machine; | |
284 | ||
876650e6 ACM |
285 | machines->host.id_hdr_size = id_hdr_size; |
286 | ||
287 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
288 | machine = rb_entry(node, struct machine, rb_node); |
289 | machine->id_hdr_size = id_hdr_size; | |
290 | } | |
291 | ||
292 | return; | |
293 | } | |
294 | ||
29ce3612 AH |
295 | static void machine__update_thread_pid(struct machine *machine, |
296 | struct thread *th, pid_t pid) | |
297 | { | |
298 | struct thread *leader; | |
299 | ||
300 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
301 | return; | |
302 | ||
303 | th->pid_ = pid; | |
304 | ||
305 | if (th->pid_ == th->tid) | |
306 | return; | |
307 | ||
308 | leader = machine__findnew_thread(machine, th->pid_, th->pid_); | |
309 | if (!leader) | |
310 | goto out_err; | |
311 | ||
312 | if (!leader->mg) | |
11246c70 | 313 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
314 | |
315 | if (!leader->mg) | |
316 | goto out_err; | |
317 | ||
318 | if (th->mg == leader->mg) | |
319 | return; | |
320 | ||
321 | if (th->mg) { | |
322 | /* | |
323 | * Maps are created from MMAP events which provide the pid and | |
324 | * tid. Consequently there never should be any maps on a thread | |
325 | * with an unknown pid. Just print an error if there are. | |
326 | */ | |
327 | if (!map_groups__empty(th->mg)) | |
328 | pr_err("Discarding thread maps for %d:%d\n", | |
329 | th->pid_, th->tid); | |
330 | map_groups__delete(th->mg); | |
331 | } | |
332 | ||
333 | th->mg = map_groups__get(leader->mg); | |
334 | ||
335 | return; | |
336 | ||
337 | out_err: | |
338 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
339 | } | |
340 | ||
99d725fc AH |
341 | static struct thread *__machine__findnew_thread(struct machine *machine, |
342 | pid_t pid, pid_t tid, | |
9d2f8e22 ACM |
343 | bool create) |
344 | { | |
345 | struct rb_node **p = &machine->threads.rb_node; | |
346 | struct rb_node *parent = NULL; | |
347 | struct thread *th; | |
348 | ||
349 | /* | |
38051234 | 350 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
351 | * so most of the time we dont have to look up |
352 | * the full rbtree: | |
353 | */ | |
29ce3612 | 354 | th = machine->last_match; |
f3b623b8 ACM |
355 | if (th != NULL) { |
356 | if (th->tid == tid) { | |
357 | machine__update_thread_pid(machine, th, pid); | |
358 | return th; | |
359 | } | |
360 | ||
361 | thread__zput(machine->last_match); | |
99d725fc | 362 | } |
9d2f8e22 ACM |
363 | |
364 | while (*p != NULL) { | |
365 | parent = *p; | |
366 | th = rb_entry(parent, struct thread, rb_node); | |
367 | ||
38051234 | 368 | if (th->tid == tid) { |
f3b623b8 | 369 | machine->last_match = thread__get(th); |
29ce3612 | 370 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
371 | return th; |
372 | } | |
373 | ||
38051234 | 374 | if (tid < th->tid) |
9d2f8e22 ACM |
375 | p = &(*p)->rb_left; |
376 | else | |
377 | p = &(*p)->rb_right; | |
378 | } | |
379 | ||
380 | if (!create) | |
381 | return NULL; | |
382 | ||
99d725fc | 383 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
384 | if (th != NULL) { |
385 | rb_link_node(&th->rb_node, parent, p); | |
386 | rb_insert_color(&th->rb_node, &machine->threads); | |
cddcef60 JO |
387 | |
388 | /* | |
389 | * We have to initialize map_groups separately | |
390 | * after rb tree is updated. | |
391 | * | |
392 | * The reason is that we call machine__findnew_thread | |
393 | * within thread__init_map_groups to find the thread | |
394 | * leader and that would screwed the rb tree. | |
395 | */ | |
418029b7 | 396 | if (thread__init_map_groups(th, machine)) { |
260d819e | 397 | rb_erase(&th->rb_node, &machine->threads); |
418029b7 | 398 | thread__delete(th); |
cddcef60 | 399 | return NULL; |
418029b7 | 400 | } |
f3b623b8 ACM |
401 | /* |
402 | * It is now in the rbtree, get a ref | |
403 | */ | |
404 | thread__get(th); | |
405 | machine->last_match = thread__get(th); | |
9d2f8e22 ACM |
406 | } |
407 | ||
408 | return th; | |
409 | } | |
410 | ||
314add6b AH |
411 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
412 | pid_t tid) | |
9d2f8e22 | 413 | { |
314add6b | 414 | return __machine__findnew_thread(machine, pid, tid, true); |
9d2f8e22 ACM |
415 | } |
416 | ||
d75e6097 JO |
417 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
418 | pid_t tid) | |
9d2f8e22 | 419 | { |
d75e6097 | 420 | return __machine__findnew_thread(machine, pid, tid, false); |
9d2f8e22 | 421 | } |
b0a7d1a0 | 422 | |
cfe1c414 AH |
423 | struct comm *machine__thread_exec_comm(struct machine *machine, |
424 | struct thread *thread) | |
425 | { | |
426 | if (machine->comm_exec) | |
427 | return thread__exec_comm(thread); | |
428 | else | |
429 | return thread__comm(thread); | |
430 | } | |
431 | ||
162f0bef FW |
432 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
433 | struct perf_sample *sample) | |
b0a7d1a0 | 434 | { |
314add6b AH |
435 | struct thread *thread = machine__findnew_thread(machine, |
436 | event->comm.pid, | |
437 | event->comm.tid); | |
65de51f9 | 438 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b0a7d1a0 | 439 | |
cfe1c414 AH |
440 | if (exec) |
441 | machine->comm_exec = true; | |
442 | ||
b0a7d1a0 ACM |
443 | if (dump_trace) |
444 | perf_event__fprintf_comm(event, stdout); | |
445 | ||
65de51f9 AH |
446 | if (thread == NULL || |
447 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 ACM |
448 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
449 | return -1; | |
450 | } | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 456 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
457 | { |
458 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
459 | event->lost.id, event->lost.lost); | |
460 | return 0; | |
461 | } | |
462 | ||
ca33380a JO |
463 | static struct dso* |
464 | machine__module_dso(struct machine *machine, struct kmod_path *m, | |
465 | const char *filename) | |
da17ea33 JO |
466 | { |
467 | struct dso *dso; | |
da17ea33 | 468 | |
ca33380a | 469 | dso = dsos__find(&machine->kernel_dsos, m->name, true); |
da17ea33 | 470 | if (!dso) { |
ca33380a | 471 | dso = dsos__addnew(&machine->kernel_dsos, m->name); |
da17ea33 JO |
472 | if (dso == NULL) |
473 | return NULL; | |
474 | ||
475 | if (machine__is_host(machine)) | |
476 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
477 | else | |
478 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
479 | ||
480 | /* _KMODULE_COMP should be next to _KMODULE */ | |
ca33380a | 481 | if (m->kmod && m->comp) |
da17ea33 | 482 | dso->symtab_type++; |
ca33380a JO |
483 | |
484 | dso__set_short_name(dso, strdup(m->name), true); | |
485 | dso__set_long_name(dso, strdup(filename), true); | |
da17ea33 JO |
486 | } |
487 | ||
488 | return dso; | |
489 | } | |
490 | ||
3f067dca ACM |
491 | struct map *machine__new_module(struct machine *machine, u64 start, |
492 | const char *filename) | |
493 | { | |
ca33380a JO |
494 | struct map *map = NULL; |
495 | struct dso *dso; | |
496 | struct kmod_path m; | |
3f067dca | 497 | |
ca33380a | 498 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
499 | return NULL; |
500 | ||
bc84f464 JO |
501 | map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, |
502 | m.name); | |
503 | if (map) | |
504 | goto out; | |
505 | ||
ca33380a JO |
506 | dso = machine__module_dso(machine, &m, filename); |
507 | if (dso == NULL) | |
508 | goto out; | |
509 | ||
3f067dca ACM |
510 | map = map__new2(start, dso, MAP__FUNCTION); |
511 | if (map == NULL) | |
ca33380a | 512 | goto out; |
3f067dca | 513 | |
3f067dca | 514 | map_groups__insert(&machine->kmaps, map); |
ca33380a JO |
515 | |
516 | out: | |
517 | free(m.name); | |
3f067dca ACM |
518 | return map; |
519 | } | |
520 | ||
876650e6 | 521 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
522 | { |
523 | struct rb_node *nd; | |
8fa7d87f WL |
524 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) + |
525 | __dsos__fprintf(&machines->host.user_dsos.head, fp); | |
3f067dca | 526 | |
876650e6 | 527 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 528 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
8fa7d87f WL |
529 | ret += __dsos__fprintf(&pos->kernel_dsos.head, fp); |
530 | ret += __dsos__fprintf(&pos->user_dsos.head, fp); | |
3f067dca ACM |
531 | } |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
8fa7d87f | 536 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
537 | bool (skip)(struct dso *dso, int parm), int parm) |
538 | { | |
8fa7d87f WL |
539 | return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) + |
540 | __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm); | |
3f067dca ACM |
541 | } |
542 | ||
876650e6 | 543 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
544 | bool (skip)(struct dso *dso, int parm), int parm) |
545 | { | |
546 | struct rb_node *nd; | |
876650e6 | 547 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 548 | |
876650e6 | 549 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
550 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
551 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
552 | } | |
553 | return ret; | |
554 | } | |
555 | ||
556 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
557 | { | |
558 | int i; | |
559 | size_t printed = 0; | |
560 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
561 | ||
562 | if (kdso->has_build_id) { | |
563 | char filename[PATH_MAX]; | |
564 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
565 | printed += fprintf(fp, "[0] %s\n", filename); | |
566 | } | |
567 | ||
568 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
569 | printed += fprintf(fp, "[%d] %s\n", | |
570 | i + kdso->has_build_id, vmlinux_path[i]); | |
571 | ||
572 | return printed; | |
573 | } | |
574 | ||
575 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
576 | { | |
577 | size_t ret = 0; | |
578 | struct rb_node *nd; | |
579 | ||
580 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
581 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
582 | ||
583 | ret += thread__fprintf(pos, fp); | |
584 | } | |
585 | ||
586 | return ret; | |
587 | } | |
588 | ||
589 | static struct dso *machine__get_kernel(struct machine *machine) | |
590 | { | |
591 | const char *vmlinux_name = NULL; | |
592 | struct dso *kernel; | |
593 | ||
594 | if (machine__is_host(machine)) { | |
595 | vmlinux_name = symbol_conf.vmlinux_name; | |
596 | if (!vmlinux_name) | |
597 | vmlinux_name = "[kernel.kallsyms]"; | |
598 | ||
599 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
600 | "[kernel]", | |
601 | DSO_TYPE_KERNEL); | |
602 | } else { | |
603 | char bf[PATH_MAX]; | |
604 | ||
605 | if (machine__is_default_guest(machine)) | |
606 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
607 | if (!vmlinux_name) | |
608 | vmlinux_name = machine__mmap_name(machine, bf, | |
609 | sizeof(bf)); | |
610 | ||
611 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
612 | "[guest.kernel]", | |
613 | DSO_TYPE_GUEST_KERNEL); | |
614 | } | |
615 | ||
616 | if (kernel != NULL && (!kernel->has_build_id)) | |
617 | dso__read_running_kernel_build_id(kernel, machine); | |
618 | ||
619 | return kernel; | |
620 | } | |
621 | ||
622 | struct process_args { | |
623 | u64 start; | |
624 | }; | |
625 | ||
15a0a870 AH |
626 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
627 | size_t bufsz) | |
628 | { | |
629 | if (machine__is_default_guest(machine)) | |
630 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
631 | else | |
632 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
633 | } | |
634 | ||
a93f0e55 SQ |
635 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
636 | ||
637 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
638 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
639 | * symbol_name if it's not that important. | |
640 | */ | |
4b99375b AH |
641 | static u64 machine__get_running_kernel_start(struct machine *machine, |
642 | const char **symbol_name) | |
3f067dca | 643 | { |
15a0a870 | 644 | char filename[PATH_MAX]; |
a93f0e55 SQ |
645 | int i; |
646 | const char *name; | |
647 | u64 addr = 0; | |
3f067dca | 648 | |
15a0a870 | 649 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
650 | |
651 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
652 | return 0; | |
653 | ||
a93f0e55 SQ |
654 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
655 | addr = kallsyms__get_function_start(filename, name); | |
656 | if (addr) | |
657 | break; | |
658 | } | |
659 | ||
660 | if (symbol_name) | |
661 | *symbol_name = name; | |
3f067dca | 662 | |
a93f0e55 | 663 | return addr; |
3f067dca ACM |
664 | } |
665 | ||
666 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
667 | { | |
668 | enum map_type type; | |
4b99375b | 669 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
670 | |
671 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
672 | struct kmap *kmap; | |
673 | ||
674 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
675 | if (machine->vmlinux_maps[type] == NULL) | |
676 | return -1; | |
677 | ||
678 | machine->vmlinux_maps[type]->map_ip = | |
679 | machine->vmlinux_maps[type]->unmap_ip = | |
680 | identity__map_ip; | |
681 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
682 | kmap->kmaps = &machine->kmaps; | |
683 | map_groups__insert(&machine->kmaps, | |
684 | machine->vmlinux_maps[type]); | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
690 | void machine__destroy_kernel_maps(struct machine *machine) | |
691 | { | |
692 | enum map_type type; | |
693 | ||
694 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
695 | struct kmap *kmap; | |
696 | ||
697 | if (machine->vmlinux_maps[type] == NULL) | |
698 | continue; | |
699 | ||
700 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
701 | map_groups__remove(&machine->kmaps, | |
702 | machine->vmlinux_maps[type]); | |
703 | if (kmap->ref_reloc_sym) { | |
704 | /* | |
705 | * ref_reloc_sym is shared among all maps, so free just | |
706 | * on one of them. | |
707 | */ | |
708 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
709 | zfree((char **)&kmap->ref_reloc_sym->name); |
710 | zfree(&kmap->ref_reloc_sym); | |
711 | } else | |
712 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
713 | } |
714 | ||
715 | map__delete(machine->vmlinux_maps[type]); | |
716 | machine->vmlinux_maps[type] = NULL; | |
717 | } | |
718 | } | |
719 | ||
876650e6 | 720 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
721 | { |
722 | int ret = 0; | |
723 | struct dirent **namelist = NULL; | |
724 | int i, items = 0; | |
725 | char path[PATH_MAX]; | |
726 | pid_t pid; | |
727 | char *endp; | |
728 | ||
729 | if (symbol_conf.default_guest_vmlinux_name || | |
730 | symbol_conf.default_guest_modules || | |
731 | symbol_conf.default_guest_kallsyms) { | |
732 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
733 | } | |
734 | ||
735 | if (symbol_conf.guestmount) { | |
736 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
737 | if (items <= 0) | |
738 | return -ENOENT; | |
739 | for (i = 0; i < items; i++) { | |
740 | if (!isdigit(namelist[i]->d_name[0])) { | |
741 | /* Filter out . and .. */ | |
742 | continue; | |
743 | } | |
744 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
745 | if ((*endp != '\0') || | |
746 | (endp == namelist[i]->d_name) || | |
747 | (errno == ERANGE)) { | |
748 | pr_debug("invalid directory (%s). Skipping.\n", | |
749 | namelist[i]->d_name); | |
750 | continue; | |
751 | } | |
752 | sprintf(path, "%s/%s/proc/kallsyms", | |
753 | symbol_conf.guestmount, | |
754 | namelist[i]->d_name); | |
755 | ret = access(path, R_OK); | |
756 | if (ret) { | |
757 | pr_debug("Can't access file %s\n", path); | |
758 | goto failure; | |
759 | } | |
760 | machines__create_kernel_maps(machines, pid); | |
761 | } | |
762 | failure: | |
763 | free(namelist); | |
764 | } | |
765 | ||
766 | return ret; | |
767 | } | |
768 | ||
876650e6 | 769 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 770 | { |
876650e6 ACM |
771 | struct rb_node *next = rb_first(&machines->guests); |
772 | ||
773 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
774 | |
775 | while (next) { | |
776 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
777 | ||
778 | next = rb_next(&pos->rb_node); | |
876650e6 | 779 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
780 | machine__delete(pos); |
781 | } | |
782 | } | |
783 | ||
876650e6 | 784 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
785 | { |
786 | struct machine *machine = machines__findnew(machines, pid); | |
787 | ||
788 | if (machine == NULL) | |
789 | return -1; | |
790 | ||
791 | return machine__create_kernel_maps(machine); | |
792 | } | |
793 | ||
794 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
795 | enum map_type type, symbol_filter_t filter) | |
796 | { | |
797 | struct map *map = machine->vmlinux_maps[type]; | |
798 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
799 | ||
800 | if (ret > 0) { | |
801 | dso__set_loaded(map->dso, type); | |
802 | /* | |
803 | * Since /proc/kallsyms will have multiple sessions for the | |
804 | * kernel, with modules between them, fixup the end of all | |
805 | * sections. | |
806 | */ | |
807 | __map_groups__fixup_end(&machine->kmaps, type); | |
808 | } | |
809 | ||
810 | return ret; | |
811 | } | |
812 | ||
813 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
814 | symbol_filter_t filter) | |
815 | { | |
816 | struct map *map = machine->vmlinux_maps[type]; | |
817 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
818 | ||
39b12f78 | 819 | if (ret > 0) |
3f067dca | 820 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
821 | |
822 | return ret; | |
823 | } | |
824 | ||
825 | static void map_groups__fixup_end(struct map_groups *mg) | |
826 | { | |
827 | int i; | |
828 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
829 | __map_groups__fixup_end(mg, i); | |
830 | } | |
831 | ||
832 | static char *get_kernel_version(const char *root_dir) | |
833 | { | |
834 | char version[PATH_MAX]; | |
835 | FILE *file; | |
836 | char *name, *tmp; | |
837 | const char *prefix = "Linux version "; | |
838 | ||
839 | sprintf(version, "%s/proc/version", root_dir); | |
840 | file = fopen(version, "r"); | |
841 | if (!file) | |
842 | return NULL; | |
843 | ||
844 | version[0] = '\0'; | |
845 | tmp = fgets(version, sizeof(version), file); | |
846 | fclose(file); | |
847 | ||
848 | name = strstr(version, prefix); | |
849 | if (!name) | |
850 | return NULL; | |
851 | name += strlen(prefix); | |
852 | tmp = strchr(name, ' '); | |
853 | if (tmp) | |
854 | *tmp = '\0'; | |
855 | ||
856 | return strdup(name); | |
857 | } | |
858 | ||
bb58a8a4 JO |
859 | static bool is_kmod_dso(struct dso *dso) |
860 | { | |
861 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
862 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
863 | } | |
864 | ||
865 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
866 | struct kmod_path *m) | |
867 | { | |
868 | struct map *map; | |
869 | char *long_name; | |
870 | ||
871 | map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name); | |
872 | if (map == NULL) | |
873 | return 0; | |
874 | ||
875 | long_name = strdup(path); | |
876 | if (long_name == NULL) | |
877 | return -ENOMEM; | |
878 | ||
879 | dso__set_long_name(map->dso, long_name, true); | |
880 | dso__kernel_module_get_build_id(map->dso, ""); | |
881 | ||
882 | /* | |
883 | * Full name could reveal us kmod compression, so | |
884 | * we need to update the symtab_type if needed. | |
885 | */ | |
886 | if (m->comp && is_kmod_dso(map->dso)) | |
887 | map->dso->symtab_type++; | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
3f067dca | 892 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 893 | const char *dir_name, int depth) |
3f067dca ACM |
894 | { |
895 | struct dirent *dent; | |
896 | DIR *dir = opendir(dir_name); | |
897 | int ret = 0; | |
898 | ||
899 | if (!dir) { | |
900 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
901 | return -1; | |
902 | } | |
903 | ||
904 | while ((dent = readdir(dir)) != NULL) { | |
905 | char path[PATH_MAX]; | |
906 | struct stat st; | |
907 | ||
908 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
909 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
910 | if (stat(path, &st)) | |
911 | continue; | |
912 | ||
913 | if (S_ISDIR(st.st_mode)) { | |
914 | if (!strcmp(dent->d_name, ".") || | |
915 | !strcmp(dent->d_name, "..")) | |
916 | continue; | |
917 | ||
61d4290c RY |
918 | /* Do not follow top-level source and build symlinks */ |
919 | if (depth == 0) { | |
920 | if (!strcmp(dent->d_name, "source") || | |
921 | !strcmp(dent->d_name, "build")) | |
922 | continue; | |
923 | } | |
924 | ||
925 | ret = map_groups__set_modules_path_dir(mg, path, | |
926 | depth + 1); | |
3f067dca ACM |
927 | if (ret < 0) |
928 | goto out; | |
929 | } else { | |
bb58a8a4 | 930 | struct kmod_path m; |
3f067dca | 931 | |
bb58a8a4 JO |
932 | ret = kmod_path__parse_name(&m, dent->d_name); |
933 | if (ret) | |
934 | goto out; | |
c00c48fc | 935 | |
bb58a8a4 JO |
936 | if (m.kmod) |
937 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 938 | |
bb58a8a4 | 939 | free(m.name); |
3f067dca | 940 | |
bb58a8a4 | 941 | if (ret) |
3f067dca | 942 | goto out; |
3f067dca ACM |
943 | } |
944 | } | |
945 | ||
946 | out: | |
947 | closedir(dir); | |
948 | return ret; | |
949 | } | |
950 | ||
951 | static int machine__set_modules_path(struct machine *machine) | |
952 | { | |
953 | char *version; | |
954 | char modules_path[PATH_MAX]; | |
955 | ||
956 | version = get_kernel_version(machine->root_dir); | |
957 | if (!version) | |
958 | return -1; | |
959 | ||
61d4290c | 960 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
961 | machine->root_dir, version); |
962 | free(version); | |
963 | ||
61d4290c | 964 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
965 | } |
966 | ||
316d70d6 | 967 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 968 | { |
316d70d6 | 969 | struct machine *machine = arg; |
3f067dca | 970 | struct map *map; |
316d70d6 AH |
971 | |
972 | map = machine__new_module(machine, start, name); | |
973 | if (map == NULL) | |
974 | return -1; | |
975 | ||
976 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
981 | static int machine__create_modules(struct machine *machine) | |
982 | { | |
3f067dca ACM |
983 | const char *modules; |
984 | char path[PATH_MAX]; | |
985 | ||
f4be904d | 986 | if (machine__is_default_guest(machine)) { |
3f067dca | 987 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
988 | } else { |
989 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
990 | modules = path; |
991 | } | |
992 | ||
aa7fe3b0 | 993 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
994 | return -1; |
995 | ||
316d70d6 | 996 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
997 | return -1; |
998 | ||
316d70d6 AH |
999 | if (!machine__set_modules_path(machine)) |
1000 | return 0; | |
3f067dca | 1001 | |
316d70d6 | 1002 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1003 | |
8f76fcd9 | 1004 | return 0; |
3f067dca ACM |
1005 | } |
1006 | ||
1007 | int machine__create_kernel_maps(struct machine *machine) | |
1008 | { | |
1009 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 1010 | const char *name; |
4b99375b | 1011 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
1012 | if (!addr) |
1013 | return -1; | |
3f067dca ACM |
1014 | |
1015 | if (kernel == NULL || | |
1016 | __machine__create_kernel_maps(machine, kernel) < 0) | |
1017 | return -1; | |
1018 | ||
1019 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1020 | if (machine__is_host(machine)) | |
1021 | pr_debug("Problems creating module maps, " | |
1022 | "continuing anyway...\n"); | |
1023 | else | |
1024 | pr_debug("Problems creating module maps for guest %d, " | |
1025 | "continuing anyway...\n", machine->pid); | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Now that we have all the maps created, just set the ->end of them: | |
1030 | */ | |
1031 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
1032 | |
1033 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
1034 | addr)) { | |
1035 | machine__destroy_kernel_maps(machine); | |
1036 | return -1; | |
1037 | } | |
1038 | ||
3f067dca ACM |
1039 | return 0; |
1040 | } | |
1041 | ||
b0a7d1a0 ACM |
1042 | static void machine__set_kernel_mmap_len(struct machine *machine, |
1043 | union perf_event *event) | |
1044 | { | |
4552cf0f NK |
1045 | int i; |
1046 | ||
1047 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1048 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1049 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1050 | event->mmap.len); | |
1051 | /* | |
1052 | * Be a bit paranoid here, some perf.data file came with | |
1053 | * a zero sized synthesized MMAP event for the kernel. | |
1054 | */ | |
1055 | if (machine->vmlinux_maps[i]->end == 0) | |
1056 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1057 | } | |
b0a7d1a0 ACM |
1058 | } |
1059 | ||
8e0cf965 AH |
1060 | static bool machine__uses_kcore(struct machine *machine) |
1061 | { | |
1062 | struct dso *dso; | |
1063 | ||
8fa7d87f | 1064 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { |
8e0cf965 AH |
1065 | if (dso__is_kcore(dso)) |
1066 | return true; | |
1067 | } | |
1068 | ||
1069 | return false; | |
1070 | } | |
1071 | ||
b0a7d1a0 ACM |
1072 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1073 | union perf_event *event) | |
1074 | { | |
1075 | struct map *map; | |
1076 | char kmmap_prefix[PATH_MAX]; | |
1077 | enum dso_kernel_type kernel_type; | |
1078 | bool is_kernel_mmap; | |
1079 | ||
8e0cf965 AH |
1080 | /* If we have maps from kcore then we do not need or want any others */ |
1081 | if (machine__uses_kcore(machine)) | |
1082 | return 0; | |
1083 | ||
b0a7d1a0 ACM |
1084 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1085 | if (machine__is_host(machine)) | |
1086 | kernel_type = DSO_TYPE_KERNEL; | |
1087 | else | |
1088 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1089 | ||
1090 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1091 | kmmap_prefix, | |
1092 | strlen(kmmap_prefix) - 1) == 0; | |
1093 | if (event->mmap.filename[0] == '/' || | |
1094 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
b0a7d1a0 ACM |
1095 | map = machine__new_module(machine, event->mmap.start, |
1096 | event->mmap.filename); | |
1097 | if (map == NULL) | |
1098 | goto out_problem; | |
1099 | ||
b0a7d1a0 ACM |
1100 | map->end = map->start + event->mmap.len; |
1101 | } else if (is_kernel_mmap) { | |
1102 | const char *symbol_name = (event->mmap.filename + | |
1103 | strlen(kmmap_prefix)); | |
1104 | /* | |
1105 | * Should be there already, from the build-id table in | |
1106 | * the header. | |
1107 | */ | |
b837a8bd NK |
1108 | struct dso *kernel = NULL; |
1109 | struct dso *dso; | |
1110 | ||
1111 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { | |
e746b3ea | 1112 | if (is_kernel_module(dso->long_name)) |
b837a8bd NK |
1113 | continue; |
1114 | ||
1115 | kernel = dso; | |
1116 | break; | |
1117 | } | |
1118 | ||
1119 | if (kernel == NULL) | |
1120 | kernel = __dsos__findnew(&machine->kernel_dsos, | |
1121 | kmmap_prefix); | |
b0a7d1a0 ACM |
1122 | if (kernel == NULL) |
1123 | goto out_problem; | |
1124 | ||
1125 | kernel->kernel = kernel_type; | |
1126 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1127 | goto out_problem; | |
1128 | ||
330dfa22 NK |
1129 | if (strstr(kernel->long_name, "vmlinux")) |
1130 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1131 | |
b0a7d1a0 ACM |
1132 | machine__set_kernel_mmap_len(machine, event); |
1133 | ||
1134 | /* | |
1135 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1136 | * symbol. Effectively having zero here means that at record | |
1137 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1138 | */ | |
1139 | if (event->mmap.pgoff != 0) { | |
1140 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1141 | symbol_name, | |
1142 | event->mmap.pgoff); | |
1143 | } | |
1144 | ||
1145 | if (machine__is_default_guest(machine)) { | |
1146 | /* | |
1147 | * preload dso of guest kernel and modules | |
1148 | */ | |
1149 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1150 | NULL); | |
1151 | } | |
1152 | } | |
1153 | return 0; | |
1154 | out_problem: | |
1155 | return -1; | |
1156 | } | |
1157 | ||
5c5e854b | 1158 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1159 | union perf_event *event, |
1160 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1161 | { |
1162 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1163 | struct thread *thread; | |
1164 | struct map *map; | |
1165 | enum map_type type; | |
1166 | int ret = 0; | |
1167 | ||
1168 | if (dump_trace) | |
1169 | perf_event__fprintf_mmap2(event, stdout); | |
1170 | ||
1171 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1172 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1173 | ret = machine__process_kernel_mmap_event(machine, event); | |
1174 | if (ret < 0) | |
1175 | goto out_problem; | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1180 | event->mmap2.tid); |
5c5e854b SE |
1181 | if (thread == NULL) |
1182 | goto out_problem; | |
1183 | ||
1184 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1185 | type = MAP__VARIABLE; | |
1186 | else | |
1187 | type = MAP__FUNCTION; | |
1188 | ||
2a03068c | 1189 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1190 | event->mmap2.len, event->mmap2.pgoff, |
1191 | event->mmap2.pid, event->mmap2.maj, | |
1192 | event->mmap2.min, event->mmap2.ino, | |
1193 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1194 | event->mmap2.prot, |
1195 | event->mmap2.flags, | |
5835edda | 1196 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1197 | |
1198 | if (map == NULL) | |
1199 | goto out_problem; | |
1200 | ||
1201 | thread__insert_map(thread, map); | |
1202 | return 0; | |
1203 | ||
1204 | out_problem: | |
1205 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1206 | return 0; | |
1207 | } | |
1208 | ||
162f0bef FW |
1209 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1210 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1211 | { |
1212 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1213 | struct thread *thread; | |
1214 | struct map *map; | |
bad40917 | 1215 | enum map_type type; |
b0a7d1a0 ACM |
1216 | int ret = 0; |
1217 | ||
1218 | if (dump_trace) | |
1219 | perf_event__fprintf_mmap(event, stdout); | |
1220 | ||
1221 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1222 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1223 | ret = machine__process_kernel_mmap_event(machine, event); | |
1224 | if (ret < 0) | |
1225 | goto out_problem; | |
1226 | return 0; | |
1227 | } | |
1228 | ||
314add6b | 1229 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1230 | event->mmap.tid); |
b0a7d1a0 ACM |
1231 | if (thread == NULL) |
1232 | goto out_problem; | |
bad40917 SE |
1233 | |
1234 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1235 | type = MAP__VARIABLE; | |
1236 | else | |
1237 | type = MAP__FUNCTION; | |
1238 | ||
2a03068c | 1239 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1240 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1241 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1242 | event->mmap.filename, |
5835edda | 1243 | type, thread); |
bad40917 | 1244 | |
b0a7d1a0 ACM |
1245 | if (map == NULL) |
1246 | goto out_problem; | |
1247 | ||
1248 | thread__insert_map(thread, map); | |
1249 | return 0; | |
1250 | ||
1251 | out_problem: | |
1252 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1253 | return 0; | |
1254 | } | |
1255 | ||
236a3bbd DA |
1256 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1257 | { | |
f3b623b8 ACM |
1258 | if (machine->last_match == th) |
1259 | thread__zput(machine->last_match); | |
1260 | ||
236a3bbd DA |
1261 | rb_erase(&th->rb_node, &machine->threads); |
1262 | /* | |
f3b623b8 ACM |
1263 | * Move it first to the dead_threads list, then drop the reference, |
1264 | * if this is the last reference, then the thread__delete destructor | |
1265 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd DA |
1266 | */ |
1267 | list_add_tail(&th->node, &machine->dead_threads); | |
f3b623b8 | 1268 | thread__put(th); |
236a3bbd DA |
1269 | } |
1270 | ||
162f0bef FW |
1271 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1272 | struct perf_sample *sample) | |
b0a7d1a0 | 1273 | { |
d75e6097 JO |
1274 | struct thread *thread = machine__find_thread(machine, |
1275 | event->fork.pid, | |
1276 | event->fork.tid); | |
314add6b AH |
1277 | struct thread *parent = machine__findnew_thread(machine, |
1278 | event->fork.ppid, | |
1279 | event->fork.ptid); | |
b0a7d1a0 | 1280 | |
236a3bbd DA |
1281 | /* if a thread currently exists for the thread id remove it */ |
1282 | if (thread != NULL) | |
1283 | machine__remove_thread(machine, thread); | |
1284 | ||
314add6b AH |
1285 | thread = machine__findnew_thread(machine, event->fork.pid, |
1286 | event->fork.tid); | |
b0a7d1a0 ACM |
1287 | if (dump_trace) |
1288 | perf_event__fprintf_task(event, stdout); | |
1289 | ||
1290 | if (thread == NULL || parent == NULL || | |
162f0bef | 1291 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1292 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1293 | return -1; | |
1294 | } | |
1295 | ||
1296 | return 0; | |
1297 | } | |
1298 | ||
162f0bef FW |
1299 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1300 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1301 | { |
d75e6097 JO |
1302 | struct thread *thread = machine__find_thread(machine, |
1303 | event->fork.pid, | |
1304 | event->fork.tid); | |
b0a7d1a0 ACM |
1305 | |
1306 | if (dump_trace) | |
1307 | perf_event__fprintf_task(event, stdout); | |
1308 | ||
1309 | if (thread != NULL) | |
236a3bbd | 1310 | thread__exited(thread); |
b0a7d1a0 ACM |
1311 | |
1312 | return 0; | |
1313 | } | |
1314 | ||
162f0bef FW |
1315 | int machine__process_event(struct machine *machine, union perf_event *event, |
1316 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1317 | { |
1318 | int ret; | |
1319 | ||
1320 | switch (event->header.type) { | |
1321 | case PERF_RECORD_COMM: | |
162f0bef | 1322 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1323 | case PERF_RECORD_MMAP: |
162f0bef | 1324 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1325 | case PERF_RECORD_MMAP2: |
162f0bef | 1326 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1327 | case PERF_RECORD_FORK: |
162f0bef | 1328 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1329 | case PERF_RECORD_EXIT: |
162f0bef | 1330 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1331 | case PERF_RECORD_LOST: |
162f0bef | 1332 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1333 | default: |
1334 | ret = -1; | |
1335 | break; | |
1336 | } | |
1337 | ||
1338 | return ret; | |
1339 | } | |
3f067dca | 1340 | |
b21484f1 | 1341 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1342 | { |
b21484f1 | 1343 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1344 | return 1; |
3f067dca ACM |
1345 | return 0; |
1346 | } | |
1347 | ||
bb871a9c | 1348 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1349 | struct addr_map_symbol *ams, |
1350 | u64 ip) | |
1351 | { | |
1352 | struct addr_location al; | |
3f067dca ACM |
1353 | |
1354 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1355 | /* |
1356 | * We cannot use the header.misc hint to determine whether a | |
1357 | * branch stack address is user, kernel, guest, hypervisor. | |
1358 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1359 | * Thus, we have to try consecutively until we find a match | |
1360 | * or else, the symbol is unknown | |
1361 | */ | |
bb871a9c | 1362 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1363 | |
3f067dca ACM |
1364 | ams->addr = ip; |
1365 | ams->al_addr = al.addr; | |
1366 | ams->sym = al.sym; | |
1367 | ams->map = al.map; | |
1368 | } | |
1369 | ||
bb871a9c | 1370 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1371 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1372 | { | |
1373 | struct addr_location al; | |
1374 | ||
1375 | memset(&al, 0, sizeof(al)); | |
1376 | ||
bb871a9c | 1377 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1378 | if (al.map == NULL) { |
1379 | /* | |
1380 | * some shared data regions have execute bit set which puts | |
1381 | * their mapping in the MAP__FUNCTION type array. | |
1382 | * Check there as a fallback option before dropping the sample. | |
1383 | */ | |
bb871a9c | 1384 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1385 | } |
1386 | ||
98a3b32c SE |
1387 | ams->addr = addr; |
1388 | ams->al_addr = al.addr; | |
1389 | ams->sym = al.sym; | |
1390 | ams->map = al.map; | |
1391 | } | |
1392 | ||
e80faac0 ACM |
1393 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1394 | struct addr_location *al) | |
98a3b32c SE |
1395 | { |
1396 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1397 | ||
1398 | if (!mi) | |
1399 | return NULL; | |
1400 | ||
bb871a9c ACM |
1401 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1402 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1403 | mi->data_src.val = sample->data_src; |
1404 | ||
1405 | return mi; | |
1406 | } | |
1407 | ||
37592b8a AK |
1408 | static int add_callchain_ip(struct thread *thread, |
1409 | struct symbol **parent, | |
1410 | struct addr_location *root_al, | |
73dbcd65 | 1411 | u8 *cpumode, |
37592b8a AK |
1412 | u64 ip) |
1413 | { | |
1414 | struct addr_location al; | |
1415 | ||
1416 | al.filtered = 0; | |
1417 | al.sym = NULL; | |
73dbcd65 | 1418 | if (!cpumode) { |
8b7bad58 AK |
1419 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, |
1420 | ip, &al); | |
73dbcd65 | 1421 | } else { |
2e77784b KL |
1422 | if (ip >= PERF_CONTEXT_MAX) { |
1423 | switch (ip) { | |
1424 | case PERF_CONTEXT_HV: | |
73dbcd65 | 1425 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
1426 | break; |
1427 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 1428 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
1429 | break; |
1430 | case PERF_CONTEXT_USER: | |
73dbcd65 | 1431 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
1432 | break; |
1433 | default: | |
1434 | pr_debug("invalid callchain context: " | |
1435 | "%"PRId64"\n", (s64) ip); | |
1436 | /* | |
1437 | * It seems the callchain is corrupted. | |
1438 | * Discard all. | |
1439 | */ | |
1440 | callchain_cursor_reset(&callchain_cursor); | |
1441 | return 1; | |
1442 | } | |
1443 | return 0; | |
1444 | } | |
73dbcd65 DH |
1445 | thread__find_addr_location(thread, *cpumode, MAP__FUNCTION, |
1446 | ip, &al); | |
2e77784b KL |
1447 | } |
1448 | ||
37592b8a AK |
1449 | if (al.sym != NULL) { |
1450 | if (sort__has_parent && !*parent && | |
1451 | symbol__match_regex(al.sym, &parent_regex)) | |
1452 | *parent = al.sym; | |
1453 | else if (have_ignore_callees && root_al && | |
1454 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1455 | /* Treat this symbol as the root, | |
1456 | forgetting its callees. */ | |
1457 | *root_al = al; | |
1458 | callchain_cursor_reset(&callchain_cursor); | |
1459 | } | |
1460 | } | |
1461 | ||
5550171b | 1462 | return callchain_cursor_append(&callchain_cursor, al.addr, al.map, al.sym); |
37592b8a AK |
1463 | } |
1464 | ||
644f2df2 ACM |
1465 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1466 | struct addr_location *al) | |
3f067dca | 1467 | { |
3f067dca | 1468 | unsigned int i; |
644f2df2 ACM |
1469 | const struct branch_stack *bs = sample->branch_stack; |
1470 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1471 | |
3f067dca ACM |
1472 | if (!bi) |
1473 | return NULL; | |
1474 | ||
1475 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1476 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1477 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1478 | bi[i].flags = bs->entries[i].flags; |
1479 | } | |
1480 | return bi; | |
1481 | } | |
1482 | ||
8b7bad58 AK |
1483 | #define CHASHSZ 127 |
1484 | #define CHASHBITS 7 | |
1485 | #define NO_ENTRY 0xff | |
1486 | ||
1487 | #define PERF_MAX_BRANCH_DEPTH 127 | |
1488 | ||
1489 | /* Remove loops. */ | |
1490 | static int remove_loops(struct branch_entry *l, int nr) | |
1491 | { | |
1492 | int i, j, off; | |
1493 | unsigned char chash[CHASHSZ]; | |
1494 | ||
1495 | memset(chash, NO_ENTRY, sizeof(chash)); | |
1496 | ||
1497 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
1498 | ||
1499 | for (i = 0; i < nr; i++) { | |
1500 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
1501 | ||
1502 | /* no collision handling for now */ | |
1503 | if (chash[h] == NO_ENTRY) { | |
1504 | chash[h] = i; | |
1505 | } else if (l[chash[h]].from == l[i].from) { | |
1506 | bool is_loop = true; | |
1507 | /* check if it is a real loop */ | |
1508 | off = 0; | |
1509 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
1510 | if (l[j].from != l[i + off].from) { | |
1511 | is_loop = false; | |
1512 | break; | |
1513 | } | |
1514 | if (is_loop) { | |
1515 | memmove(l + i, l + i + off, | |
1516 | (nr - (i + off)) * sizeof(*l)); | |
1517 | nr -= off; | |
1518 | } | |
1519 | } | |
1520 | } | |
1521 | return nr; | |
1522 | } | |
1523 | ||
384b6055 KL |
1524 | /* |
1525 | * Recolve LBR callstack chain sample | |
1526 | * Return: | |
1527 | * 1 on success get LBR callchain information | |
1528 | * 0 no available LBR callchain information, should try fp | |
1529 | * negative error code on other errors. | |
1530 | */ | |
1531 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
1532 | struct perf_sample *sample, | |
1533 | struct symbol **parent, | |
1534 | struct addr_location *root_al, | |
1535 | int max_stack) | |
3f067dca | 1536 | { |
384b6055 KL |
1537 | struct ip_callchain *chain = sample->callchain; |
1538 | int chain_nr = min(max_stack, (int)chain->nr); | |
73dbcd65 | 1539 | u8 cpumode = PERF_RECORD_MISC_USER; |
384b6055 KL |
1540 | int i, j, err; |
1541 | u64 ip; | |
1542 | ||
1543 | for (i = 0; i < chain_nr; i++) { | |
1544 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
1545 | break; | |
1546 | } | |
1547 | ||
1548 | /* LBR only affects the user callchain */ | |
1549 | if (i != chain_nr) { | |
1550 | struct branch_stack *lbr_stack = sample->branch_stack; | |
1551 | int lbr_nr = lbr_stack->nr; | |
1552 | /* | |
1553 | * LBR callstack can only get user call chain. | |
1554 | * The mix_chain_nr is kernel call chain | |
1555 | * number plus LBR user call chain number. | |
1556 | * i is kernel call chain number, | |
1557 | * 1 is PERF_CONTEXT_USER, | |
1558 | * lbr_nr + 1 is the user call chain number. | |
1559 | * For details, please refer to the comments | |
1560 | * in callchain__printf | |
1561 | */ | |
1562 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
1563 | ||
1564 | if (mix_chain_nr > PERF_MAX_STACK_DEPTH + PERF_MAX_BRANCH_DEPTH) { | |
1565 | pr_warning("corrupted callchain. skipping...\n"); | |
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | for (j = 0; j < mix_chain_nr; j++) { | |
1570 | if (callchain_param.order == ORDER_CALLEE) { | |
1571 | if (j < i + 1) | |
1572 | ip = chain->ips[j]; | |
1573 | else if (j > i + 1) | |
1574 | ip = lbr_stack->entries[j - i - 2].from; | |
1575 | else | |
1576 | ip = lbr_stack->entries[0].to; | |
1577 | } else { | |
1578 | if (j < lbr_nr) | |
1579 | ip = lbr_stack->entries[lbr_nr - j - 1].from; | |
1580 | else if (j > lbr_nr) | |
1581 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
1582 | else | |
1583 | ip = lbr_stack->entries[0].to; | |
1584 | } | |
1585 | ||
73dbcd65 | 1586 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
384b6055 KL |
1587 | if (err) |
1588 | return (err < 0) ? err : 0; | |
1589 | } | |
1590 | return 1; | |
1591 | } | |
1592 | ||
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | static int thread__resolve_callchain_sample(struct thread *thread, | |
1597 | struct perf_evsel *evsel, | |
1598 | struct perf_sample *sample, | |
1599 | struct symbol **parent, | |
1600 | struct addr_location *root_al, | |
1601 | int max_stack) | |
1602 | { | |
1603 | struct branch_stack *branch = sample->branch_stack; | |
1604 | struct ip_callchain *chain = sample->callchain; | |
91e95617 | 1605 | int chain_nr = min(max_stack, (int)chain->nr); |
73dbcd65 | 1606 | u8 cpumode = PERF_RECORD_MISC_USER; |
2e77784b | 1607 | int i, j, err; |
8b7bad58 AK |
1608 | int skip_idx = -1; |
1609 | int first_call = 0; | |
1610 | ||
384b6055 KL |
1611 | callchain_cursor_reset(&callchain_cursor); |
1612 | ||
1613 | if (has_branch_callstack(evsel)) { | |
1614 | err = resolve_lbr_callchain_sample(thread, sample, parent, | |
1615 | root_al, max_stack); | |
1616 | if (err) | |
1617 | return (err < 0) ? err : 0; | |
1618 | } | |
1619 | ||
8b7bad58 AK |
1620 | /* |
1621 | * Based on DWARF debug information, some architectures skip | |
1622 | * a callchain entry saved by the kernel. | |
1623 | */ | |
1624 | if (chain->nr < PERF_MAX_STACK_DEPTH) | |
1625 | skip_idx = arch_skip_callchain_idx(thread, chain); | |
3f067dca | 1626 | |
8b7bad58 AK |
1627 | /* |
1628 | * Add branches to call stack for easier browsing. This gives | |
1629 | * more context for a sample than just the callers. | |
1630 | * | |
1631 | * This uses individual histograms of paths compared to the | |
1632 | * aggregated histograms the normal LBR mode uses. | |
1633 | * | |
1634 | * Limitations for now: | |
1635 | * - No extra filters | |
1636 | * - No annotations (should annotate somehow) | |
1637 | */ | |
1638 | ||
1639 | if (branch && callchain_param.branch_callstack) { | |
1640 | int nr = min(max_stack, (int)branch->nr); | |
1641 | struct branch_entry be[nr]; | |
1642 | ||
1643 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
1644 | pr_warning("corrupted branch chain. skipping...\n"); | |
1645 | goto check_calls; | |
1646 | } | |
1647 | ||
1648 | for (i = 0; i < nr; i++) { | |
1649 | if (callchain_param.order == ORDER_CALLEE) { | |
1650 | be[i] = branch->entries[i]; | |
1651 | /* | |
1652 | * Check for overlap into the callchain. | |
1653 | * The return address is one off compared to | |
1654 | * the branch entry. To adjust for this | |
1655 | * assume the calling instruction is not longer | |
1656 | * than 8 bytes. | |
1657 | */ | |
1658 | if (i == skip_idx || | |
1659 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
1660 | first_call++; | |
1661 | else if (be[i].from < chain->ips[first_call] && | |
1662 | be[i].from >= chain->ips[first_call] - 8) | |
1663 | first_call++; | |
1664 | } else | |
1665 | be[i] = branch->entries[branch->nr - i - 1]; | |
1666 | } | |
1667 | ||
1668 | nr = remove_loops(be, nr); | |
1669 | ||
1670 | for (i = 0; i < nr; i++) { | |
1671 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1672 | NULL, be[i].to); |
8b7bad58 AK |
1673 | if (!err) |
1674 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1675 | NULL, be[i].from); |
8b7bad58 AK |
1676 | if (err == -EINVAL) |
1677 | break; | |
1678 | if (err) | |
1679 | return err; | |
1680 | } | |
1681 | chain_nr -= nr; | |
1682 | } | |
1683 | ||
1684 | check_calls: | |
3f067dca ACM |
1685 | if (chain->nr > PERF_MAX_STACK_DEPTH) { |
1686 | pr_warning("corrupted callchain. skipping...\n"); | |
1687 | return 0; | |
1688 | } | |
1689 | ||
8b7bad58 | 1690 | for (i = first_call; i < chain_nr; i++) { |
3f067dca | 1691 | u64 ip; |
3f067dca ACM |
1692 | |
1693 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1694 | j = i; |
3f067dca | 1695 | else |
a60335ba SB |
1696 | j = chain->nr - i - 1; |
1697 | ||
1698 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1699 | if (j == skip_idx) | |
1700 | continue; | |
1701 | #endif | |
1702 | ip = chain->ips[j]; | |
3f067dca | 1703 | |
73dbcd65 | 1704 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
3f067dca | 1705 | |
3f067dca | 1706 | if (err) |
2e77784b | 1707 | return (err < 0) ? err : 0; |
3f067dca ACM |
1708 | } |
1709 | ||
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1714 | { | |
1715 | struct callchain_cursor *cursor = arg; | |
1716 | return callchain_cursor_append(cursor, entry->ip, | |
1717 | entry->map, entry->sym); | |
1718 | } | |
1719 | ||
cc8b7c2b ACM |
1720 | int thread__resolve_callchain(struct thread *thread, |
1721 | struct perf_evsel *evsel, | |
1722 | struct perf_sample *sample, | |
1723 | struct symbol **parent, | |
1724 | struct addr_location *root_al, | |
1725 | int max_stack) | |
3f067dca | 1726 | { |
384b6055 KL |
1727 | int ret = thread__resolve_callchain_sample(thread, evsel, |
1728 | sample, parent, | |
1729 | root_al, max_stack); | |
3f067dca ACM |
1730 | if (ret) |
1731 | return ret; | |
1732 | ||
1733 | /* Can we do dwarf post unwind? */ | |
1734 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1735 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1736 | return 0; | |
1737 | ||
1738 | /* Bail out if nothing was captured. */ | |
1739 | if ((!sample->user_regs.regs) || | |
1740 | (!sample->user_stack.size)) | |
1741 | return 0; | |
1742 | ||
dd8c17a5 | 1743 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1744 | thread, sample, max_stack); |
3f067dca ACM |
1745 | |
1746 | } | |
35feee19 DA |
1747 | |
1748 | int machine__for_each_thread(struct machine *machine, | |
1749 | int (*fn)(struct thread *thread, void *p), | |
1750 | void *priv) | |
1751 | { | |
1752 | struct rb_node *nd; | |
1753 | struct thread *thread; | |
1754 | int rc = 0; | |
1755 | ||
1756 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1757 | thread = rb_entry(nd, struct thread, rb_node); | |
1758 | rc = fn(thread, priv); | |
1759 | if (rc != 0) | |
1760 | return rc; | |
1761 | } | |
1762 | ||
1763 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1764 | rc = fn(thread, priv); | |
1765 | if (rc != 0) | |
1766 | return rc; | |
1767 | } | |
1768 | return rc; | |
1769 | } | |
58d925dc | 1770 | |
a33fbd56 | 1771 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1772 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1773 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1774 | { |
602ad878 | 1775 | if (target__has_task(target)) |
58d925dc | 1776 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1777 | else if (target__has_cpu(target)) |
58d925dc ACM |
1778 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1779 | /* command specified */ | |
1780 | return 0; | |
1781 | } | |
b9d266ba AH |
1782 | |
1783 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1784 | { | |
1785 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1786 | return -1; | |
1787 | ||
1788 | return machine->current_tid[cpu]; | |
1789 | } | |
1790 | ||
1791 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1792 | pid_t tid) | |
1793 | { | |
1794 | struct thread *thread; | |
1795 | ||
1796 | if (cpu < 0) | |
1797 | return -EINVAL; | |
1798 | ||
1799 | if (!machine->current_tid) { | |
1800 | int i; | |
1801 | ||
1802 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1803 | if (!machine->current_tid) | |
1804 | return -ENOMEM; | |
1805 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1806 | machine->current_tid[i] = -1; | |
1807 | } | |
1808 | ||
1809 | if (cpu >= MAX_NR_CPUS) { | |
1810 | pr_err("Requested CPU %d too large. ", cpu); | |
1811 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1812 | return -EINVAL; | |
1813 | } | |
1814 | ||
1815 | machine->current_tid[cpu] = tid; | |
1816 | ||
1817 | thread = machine__findnew_thread(machine, pid, tid); | |
1818 | if (!thread) | |
1819 | return -ENOMEM; | |
1820 | ||
1821 | thread->cpu = cpu; | |
1822 | ||
1823 | return 0; | |
1824 | } | |
fbe2af45 AH |
1825 | |
1826 | int machine__get_kernel_start(struct machine *machine) | |
1827 | { | |
1828 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1829 | int err = 0; | |
1830 | ||
1831 | /* | |
1832 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1833 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1834 | * all addresses including kernel addresses are less than 2^32. In | |
1835 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1836 | * addresses will be assumed to be in user space - see | |
1837 | * machine__kernel_ip(). | |
1838 | */ | |
1839 | machine->kernel_start = 1ULL << 63; | |
1840 | if (map) { | |
1841 | err = map__load(map, machine->symbol_filter); | |
1842 | if (map->start) | |
1843 | machine->kernel_start = map->start; | |
1844 | } | |
1845 | return err; | |
1846 | } |